xref: /linux/drivers/net/ethernet/nvidia/forcedeth.c (revision 621cde16e49b3ecf7d59a8106a20aaebfb4a59a9)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * forcedeth: Ethernet driver for NVIDIA nForce media access controllers.
4  *
5  * Note: This driver is a cleanroom reimplementation based on reverse
6  *      engineered documentation written by Carl-Daniel Hailfinger
7  *      and Andrew de Quincey.
8  *
9  * NVIDIA, nForce and other NVIDIA marks are trademarks or registered
10  * trademarks of NVIDIA Corporation in the United States and other
11  * countries.
12  *
13  * Copyright (C) 2003,4,5 Manfred Spraul
14  * Copyright (C) 2004 Andrew de Quincey (wol support)
15  * Copyright (C) 2004 Carl-Daniel Hailfinger (invalid MAC handling, insane
16  *		IRQ rate fixes, bigendian fixes, cleanups, verification)
17  * Copyright (c) 2004,2005,2006,2007,2008,2009 NVIDIA Corporation
18  *
19  * Known bugs:
20  * We suspect that on some hardware no TX done interrupts are generated.
21  * This means recovery from netif_stop_queue only happens if the hw timer
22  * interrupt fires (100 times/second, configurable with NVREG_POLL_DEFAULT)
23  * and the timer is active in the IRQMask, or if a rx packet arrives by chance.
24  * If your hardware reliably generates tx done interrupts, then you can remove
25  * DEV_NEED_TIMERIRQ from the driver_data flags.
26  * DEV_NEED_TIMERIRQ will not harm you on sane hardware, only generating a few
27  * superfluous timer interrupts from the nic.
28  */
29 
30 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31 
32 #define FORCEDETH_VERSION		"0.64"
33 #define DRV_NAME			"forcedeth"
34 
35 #include <linux/module.h>
36 #include <linux/types.h>
37 #include <linux/pci.h>
38 #include <linux/interrupt.h>
39 #include <linux/netdevice.h>
40 #include <linux/etherdevice.h>
41 #include <linux/delay.h>
42 #include <linux/sched.h>
43 #include <linux/spinlock.h>
44 #include <linux/ethtool.h>
45 #include <linux/timer.h>
46 #include <linux/skbuff.h>
47 #include <linux/mii.h>
48 #include <linux/random.h>
49 #include <linux/if_vlan.h>
50 #include <linux/dma-mapping.h>
51 #include <linux/slab.h>
52 #include <linux/uaccess.h>
53 #include <linux/prefetch.h>
54 #include <linux/u64_stats_sync.h>
55 #include <linux/io.h>
56 
57 #include <asm/irq.h>
58 
59 #define TX_WORK_PER_LOOP  NAPI_POLL_WEIGHT
60 #define RX_WORK_PER_LOOP  NAPI_POLL_WEIGHT
61 
62 /*
63  * Hardware access:
64  */
65 
66 #define DEV_NEED_TIMERIRQ          0x0000001  /* set the timer irq flag in the irq mask */
67 #define DEV_NEED_LINKTIMER         0x0000002  /* poll link settings. Relies on the timer irq */
68 #define DEV_HAS_LARGEDESC          0x0000004  /* device supports jumbo frames and needs packet format 2 */
69 #define DEV_HAS_HIGH_DMA           0x0000008  /* device supports 64bit dma */
70 #define DEV_HAS_CHECKSUM           0x0000010  /* device supports tx and rx checksum offloads */
71 #define DEV_HAS_VLAN               0x0000020  /* device supports vlan tagging and striping */
72 #define DEV_HAS_MSI                0x0000040  /* device supports MSI */
73 #define DEV_HAS_MSI_X              0x0000080  /* device supports MSI-X */
74 #define DEV_HAS_POWER_CNTRL        0x0000100  /* device supports power savings */
75 #define DEV_HAS_STATISTICS_V1      0x0000200  /* device supports hw statistics version 1 */
76 #define DEV_HAS_STATISTICS_V2      0x0000400  /* device supports hw statistics version 2 */
77 #define DEV_HAS_STATISTICS_V3      0x0000800  /* device supports hw statistics version 3 */
78 #define DEV_HAS_STATISTICS_V12     0x0000600  /* device supports hw statistics version 1 and 2 */
79 #define DEV_HAS_STATISTICS_V123    0x0000e00  /* device supports hw statistics version 1, 2, and 3 */
80 #define DEV_HAS_TEST_EXTENDED      0x0001000  /* device supports extended diagnostic test */
81 #define DEV_HAS_MGMT_UNIT          0x0002000  /* device supports management unit */
82 #define DEV_HAS_CORRECT_MACADDR    0x0004000  /* device supports correct mac address order */
83 #define DEV_HAS_COLLISION_FIX      0x0008000  /* device supports tx collision fix */
84 #define DEV_HAS_PAUSEFRAME_TX_V1   0x0010000  /* device supports tx pause frames version 1 */
85 #define DEV_HAS_PAUSEFRAME_TX_V2   0x0020000  /* device supports tx pause frames version 2 */
86 #define DEV_HAS_PAUSEFRAME_TX_V3   0x0040000  /* device supports tx pause frames version 3 */
87 #define DEV_NEED_TX_LIMIT          0x0080000  /* device needs to limit tx */
88 #define DEV_NEED_TX_LIMIT2         0x0180000  /* device needs to limit tx, expect for some revs */
89 #define DEV_HAS_GEAR_MODE          0x0200000  /* device supports gear mode */
90 #define DEV_NEED_PHY_INIT_FIX      0x0400000  /* device needs specific phy workaround */
91 #define DEV_NEED_LOW_POWER_FIX     0x0800000  /* device needs special power up workaround */
92 #define DEV_NEED_MSI_FIX           0x1000000  /* device needs msi workaround */
93 
94 enum {
95 	NvRegIrqStatus = 0x000,
96 #define NVREG_IRQSTAT_MIIEVENT	0x040
97 #define NVREG_IRQSTAT_MASK		0x83ff
98 	NvRegIrqMask = 0x004,
99 #define NVREG_IRQ_RX_ERROR		0x0001
100 #define NVREG_IRQ_RX			0x0002
101 #define NVREG_IRQ_RX_NOBUF		0x0004
102 #define NVREG_IRQ_TX_ERR		0x0008
103 #define NVREG_IRQ_TX_OK			0x0010
104 #define NVREG_IRQ_TIMER			0x0020
105 #define NVREG_IRQ_LINK			0x0040
106 #define NVREG_IRQ_RX_FORCED		0x0080
107 #define NVREG_IRQ_TX_FORCED		0x0100
108 #define NVREG_IRQ_RECOVER_ERROR		0x8200
109 #define NVREG_IRQMASK_THROUGHPUT	0x00df
110 #define NVREG_IRQMASK_CPU		0x0060
111 #define NVREG_IRQ_TX_ALL		(NVREG_IRQ_TX_ERR|NVREG_IRQ_TX_OK|NVREG_IRQ_TX_FORCED)
112 #define NVREG_IRQ_RX_ALL		(NVREG_IRQ_RX_ERROR|NVREG_IRQ_RX|NVREG_IRQ_RX_NOBUF|NVREG_IRQ_RX_FORCED)
113 #define NVREG_IRQ_OTHER			(NVREG_IRQ_TIMER|NVREG_IRQ_LINK|NVREG_IRQ_RECOVER_ERROR)
114 
115 	NvRegUnknownSetupReg6 = 0x008,
116 #define NVREG_UNKSETUP6_VAL		3
117 
118 /*
119  * NVREG_POLL_DEFAULT is the interval length of the timer source on the nic
120  * NVREG_POLL_DEFAULT=97 would result in an interval length of 1 ms
121  */
122 	NvRegPollingInterval = 0x00c,
123 #define NVREG_POLL_DEFAULT_THROUGHPUT	65535 /* backup tx cleanup if loop max reached */
124 #define NVREG_POLL_DEFAULT_CPU	13
125 	NvRegMSIMap0 = 0x020,
126 	NvRegMSIMap1 = 0x024,
127 	NvRegMSIIrqMask = 0x030,
128 #define NVREG_MSI_VECTOR_0_ENABLED 0x01
129 	NvRegMisc1 = 0x080,
130 #define NVREG_MISC1_PAUSE_TX	0x01
131 #define NVREG_MISC1_HD		0x02
132 #define NVREG_MISC1_FORCE	0x3b0f3c
133 
134 	NvRegMacReset = 0x34,
135 #define NVREG_MAC_RESET_ASSERT	0x0F3
136 	NvRegTransmitterControl = 0x084,
137 #define NVREG_XMITCTL_START	0x01
138 #define NVREG_XMITCTL_MGMT_ST	0x40000000
139 #define NVREG_XMITCTL_SYNC_MASK		0x000f0000
140 #define NVREG_XMITCTL_SYNC_NOT_READY	0x0
141 #define NVREG_XMITCTL_SYNC_PHY_INIT	0x00040000
142 #define NVREG_XMITCTL_MGMT_SEMA_MASK	0x00000f00
143 #define NVREG_XMITCTL_MGMT_SEMA_FREE	0x0
144 #define NVREG_XMITCTL_HOST_SEMA_MASK	0x0000f000
145 #define NVREG_XMITCTL_HOST_SEMA_ACQ	0x0000f000
146 #define NVREG_XMITCTL_HOST_LOADED	0x00004000
147 #define NVREG_XMITCTL_TX_PATH_EN	0x01000000
148 #define NVREG_XMITCTL_DATA_START	0x00100000
149 #define NVREG_XMITCTL_DATA_READY	0x00010000
150 #define NVREG_XMITCTL_DATA_ERROR	0x00020000
151 	NvRegTransmitterStatus = 0x088,
152 #define NVREG_XMITSTAT_BUSY	0x01
153 
154 	NvRegPacketFilterFlags = 0x8c,
155 #define NVREG_PFF_PAUSE_RX	0x08
156 #define NVREG_PFF_ALWAYS	0x7F0000
157 #define NVREG_PFF_PROMISC	0x80
158 #define NVREG_PFF_MYADDR	0x20
159 #define NVREG_PFF_LOOPBACK	0x10
160 
161 	NvRegOffloadConfig = 0x90,
162 #define NVREG_OFFLOAD_HOMEPHY	0x601
163 #define NVREG_OFFLOAD_NORMAL	RX_NIC_BUFSIZE
164 	NvRegReceiverControl = 0x094,
165 #define NVREG_RCVCTL_START	0x01
166 #define NVREG_RCVCTL_RX_PATH_EN	0x01000000
167 	NvRegReceiverStatus = 0x98,
168 #define NVREG_RCVSTAT_BUSY	0x01
169 
170 	NvRegSlotTime = 0x9c,
171 #define NVREG_SLOTTIME_LEGBF_ENABLED	0x80000000
172 #define NVREG_SLOTTIME_10_100_FULL	0x00007f00
173 #define NVREG_SLOTTIME_1000_FULL	0x0003ff00
174 #define NVREG_SLOTTIME_HALF		0x0000ff00
175 #define NVREG_SLOTTIME_DEFAULT		0x00007f00
176 #define NVREG_SLOTTIME_MASK		0x000000ff
177 
178 	NvRegTxDeferral = 0xA0,
179 #define NVREG_TX_DEFERRAL_DEFAULT		0x15050f
180 #define NVREG_TX_DEFERRAL_RGMII_10_100		0x16070f
181 #define NVREG_TX_DEFERRAL_RGMII_1000		0x14050f
182 #define NVREG_TX_DEFERRAL_RGMII_STRETCH_10	0x16190f
183 #define NVREG_TX_DEFERRAL_RGMII_STRETCH_100	0x16300f
184 #define NVREG_TX_DEFERRAL_MII_STRETCH		0x152000
185 	NvRegRxDeferral = 0xA4,
186 #define NVREG_RX_DEFERRAL_DEFAULT	0x16
187 	NvRegMacAddrA = 0xA8,
188 	NvRegMacAddrB = 0xAC,
189 	NvRegMulticastAddrA = 0xB0,
190 #define NVREG_MCASTADDRA_FORCE	0x01
191 	NvRegMulticastAddrB = 0xB4,
192 	NvRegMulticastMaskA = 0xB8,
193 #define NVREG_MCASTMASKA_NONE		0xffffffff
194 	NvRegMulticastMaskB = 0xBC,
195 #define NVREG_MCASTMASKB_NONE		0xffff
196 
197 	NvRegPhyInterface = 0xC0,
198 #define PHY_RGMII		0x10000000
199 	NvRegBackOffControl = 0xC4,
200 #define NVREG_BKOFFCTRL_DEFAULT			0x70000000
201 #define NVREG_BKOFFCTRL_SEED_MASK		0x000003ff
202 #define NVREG_BKOFFCTRL_SELECT			24
203 #define NVREG_BKOFFCTRL_GEAR			12
204 
205 	NvRegTxRingPhysAddr = 0x100,
206 	NvRegRxRingPhysAddr = 0x104,
207 	NvRegRingSizes = 0x108,
208 #define NVREG_RINGSZ_TXSHIFT 0
209 #define NVREG_RINGSZ_RXSHIFT 16
210 	NvRegTransmitPoll = 0x10c,
211 #define NVREG_TRANSMITPOLL_MAC_ADDR_REV	0x00008000
212 	NvRegLinkSpeed = 0x110,
213 #define NVREG_LINKSPEED_FORCE 0x10000
214 #define NVREG_LINKSPEED_10	1000
215 #define NVREG_LINKSPEED_100	100
216 #define NVREG_LINKSPEED_1000	50
217 #define NVREG_LINKSPEED_MASK	(0xFFF)
218 	NvRegUnknownSetupReg5 = 0x130,
219 #define NVREG_UNKSETUP5_BIT31	(1<<31)
220 	NvRegTxWatermark = 0x13c,
221 #define NVREG_TX_WM_DESC1_DEFAULT	0x0200010
222 #define NVREG_TX_WM_DESC2_3_DEFAULT	0x1e08000
223 #define NVREG_TX_WM_DESC2_3_1000	0xfe08000
224 	NvRegTxRxControl = 0x144,
225 #define NVREG_TXRXCTL_KICK	0x0001
226 #define NVREG_TXRXCTL_BIT1	0x0002
227 #define NVREG_TXRXCTL_BIT2	0x0004
228 #define NVREG_TXRXCTL_IDLE	0x0008
229 #define NVREG_TXRXCTL_RESET	0x0010
230 #define NVREG_TXRXCTL_RXCHECK	0x0400
231 #define NVREG_TXRXCTL_DESC_1	0
232 #define NVREG_TXRXCTL_DESC_2	0x002100
233 #define NVREG_TXRXCTL_DESC_3	0xc02200
234 #define NVREG_TXRXCTL_VLANSTRIP 0x00040
235 #define NVREG_TXRXCTL_VLANINS	0x00080
236 	NvRegTxRingPhysAddrHigh = 0x148,
237 	NvRegRxRingPhysAddrHigh = 0x14C,
238 	NvRegTxPauseFrame = 0x170,
239 #define NVREG_TX_PAUSEFRAME_DISABLE	0x0fff0080
240 #define NVREG_TX_PAUSEFRAME_ENABLE_V1	0x01800010
241 #define NVREG_TX_PAUSEFRAME_ENABLE_V2	0x056003f0
242 #define NVREG_TX_PAUSEFRAME_ENABLE_V3	0x09f00880
243 	NvRegTxPauseFrameLimit = 0x174,
244 #define NVREG_TX_PAUSEFRAMELIMIT_ENABLE	0x00010000
245 	NvRegMIIStatus = 0x180,
246 #define NVREG_MIISTAT_ERROR		0x0001
247 #define NVREG_MIISTAT_LINKCHANGE	0x0008
248 #define NVREG_MIISTAT_MASK_RW		0x0007
249 #define NVREG_MIISTAT_MASK_ALL		0x000f
250 	NvRegMIIMask = 0x184,
251 #define NVREG_MII_LINKCHANGE		0x0008
252 
253 	NvRegAdapterControl = 0x188,
254 #define NVREG_ADAPTCTL_START	0x02
255 #define NVREG_ADAPTCTL_LINKUP	0x04
256 #define NVREG_ADAPTCTL_PHYVALID	0x40000
257 #define NVREG_ADAPTCTL_RUNNING	0x100000
258 #define NVREG_ADAPTCTL_PHYSHIFT	24
259 	NvRegMIISpeed = 0x18c,
260 #define NVREG_MIISPEED_BIT8	(1<<8)
261 #define NVREG_MIIDELAY	5
262 	NvRegMIIControl = 0x190,
263 #define NVREG_MIICTL_INUSE	0x08000
264 #define NVREG_MIICTL_WRITE	0x00400
265 #define NVREG_MIICTL_ADDRSHIFT	5
266 	NvRegMIIData = 0x194,
267 	NvRegTxUnicast = 0x1a0,
268 	NvRegTxMulticast = 0x1a4,
269 	NvRegTxBroadcast = 0x1a8,
270 	NvRegWakeUpFlags = 0x200,
271 #define NVREG_WAKEUPFLAGS_VAL		0x7770
272 #define NVREG_WAKEUPFLAGS_BUSYSHIFT	24
273 #define NVREG_WAKEUPFLAGS_ENABLESHIFT	16
274 #define NVREG_WAKEUPFLAGS_D3SHIFT	12
275 #define NVREG_WAKEUPFLAGS_D2SHIFT	8
276 #define NVREG_WAKEUPFLAGS_D1SHIFT	4
277 #define NVREG_WAKEUPFLAGS_D0SHIFT	0
278 #define NVREG_WAKEUPFLAGS_ACCEPT_MAGPAT		0x01
279 #define NVREG_WAKEUPFLAGS_ACCEPT_WAKEUPPAT	0x02
280 #define NVREG_WAKEUPFLAGS_ACCEPT_LINKCHANGE	0x04
281 #define NVREG_WAKEUPFLAGS_ENABLE	0x1111
282 
283 	NvRegMgmtUnitGetVersion = 0x204,
284 #define NVREG_MGMTUNITGETVERSION	0x01
285 	NvRegMgmtUnitVersion = 0x208,
286 #define NVREG_MGMTUNITVERSION		0x08
287 	NvRegPowerCap = 0x268,
288 #define NVREG_POWERCAP_D3SUPP	(1<<30)
289 #define NVREG_POWERCAP_D2SUPP	(1<<26)
290 #define NVREG_POWERCAP_D1SUPP	(1<<25)
291 	NvRegPowerState = 0x26c,
292 #define NVREG_POWERSTATE_POWEREDUP	0x8000
293 #define NVREG_POWERSTATE_VALID		0x0100
294 #define NVREG_POWERSTATE_MASK		0x0003
295 #define NVREG_POWERSTATE_D0		0x0000
296 #define NVREG_POWERSTATE_D1		0x0001
297 #define NVREG_POWERSTATE_D2		0x0002
298 #define NVREG_POWERSTATE_D3		0x0003
299 	NvRegMgmtUnitControl = 0x278,
300 #define NVREG_MGMTUNITCONTROL_INUSE	0x20000
301 	NvRegTxCnt = 0x280,
302 	NvRegTxZeroReXmt = 0x284,
303 	NvRegTxOneReXmt = 0x288,
304 	NvRegTxManyReXmt = 0x28c,
305 	NvRegTxLateCol = 0x290,
306 	NvRegTxUnderflow = 0x294,
307 	NvRegTxLossCarrier = 0x298,
308 	NvRegTxExcessDef = 0x29c,
309 	NvRegTxRetryErr = 0x2a0,
310 	NvRegRxFrameErr = 0x2a4,
311 	NvRegRxExtraByte = 0x2a8,
312 	NvRegRxLateCol = 0x2ac,
313 	NvRegRxRunt = 0x2b0,
314 	NvRegRxFrameTooLong = 0x2b4,
315 	NvRegRxOverflow = 0x2b8,
316 	NvRegRxFCSErr = 0x2bc,
317 	NvRegRxFrameAlignErr = 0x2c0,
318 	NvRegRxLenErr = 0x2c4,
319 	NvRegRxUnicast = 0x2c8,
320 	NvRegRxMulticast = 0x2cc,
321 	NvRegRxBroadcast = 0x2d0,
322 	NvRegTxDef = 0x2d4,
323 	NvRegTxFrame = 0x2d8,
324 	NvRegRxCnt = 0x2dc,
325 	NvRegTxPause = 0x2e0,
326 	NvRegRxPause = 0x2e4,
327 	NvRegRxDropFrame = 0x2e8,
328 	NvRegVlanControl = 0x300,
329 #define NVREG_VLANCONTROL_ENABLE	0x2000
330 	NvRegMSIXMap0 = 0x3e0,
331 	NvRegMSIXMap1 = 0x3e4,
332 	NvRegMSIXIrqStatus = 0x3f0,
333 
334 	NvRegPowerState2 = 0x600,
335 #define NVREG_POWERSTATE2_POWERUP_MASK		0x0F15
336 #define NVREG_POWERSTATE2_POWERUP_REV_A3	0x0001
337 #define NVREG_POWERSTATE2_PHY_RESET		0x0004
338 #define NVREG_POWERSTATE2_GATE_CLOCKS		0x0F00
339 };
340 
341 /* Big endian: should work, but is untested */
342 struct ring_desc {
343 	__le32 buf;
344 	__le32 flaglen;
345 };
346 
347 struct ring_desc_ex {
348 	__le32 bufhigh;
349 	__le32 buflow;
350 	__le32 txvlan;
351 	__le32 flaglen;
352 };
353 
354 union ring_type {
355 	struct ring_desc *orig;
356 	struct ring_desc_ex *ex;
357 };
358 
359 #define FLAG_MASK_V1 0xffff0000
360 #define FLAG_MASK_V2 0xffffc000
361 #define LEN_MASK_V1 (0xffffffff ^ FLAG_MASK_V1)
362 #define LEN_MASK_V2 (0xffffffff ^ FLAG_MASK_V2)
363 
364 #define NV_TX_LASTPACKET	(1<<16)
365 #define NV_TX_RETRYERROR	(1<<19)
366 #define NV_TX_RETRYCOUNT_MASK	(0xF<<20)
367 #define NV_TX_FORCED_INTERRUPT	(1<<24)
368 #define NV_TX_DEFERRED		(1<<26)
369 #define NV_TX_CARRIERLOST	(1<<27)
370 #define NV_TX_LATECOLLISION	(1<<28)
371 #define NV_TX_UNDERFLOW		(1<<29)
372 #define NV_TX_ERROR		(1<<30)
373 #define NV_TX_VALID		(1<<31)
374 
375 #define NV_TX2_LASTPACKET	(1<<29)
376 #define NV_TX2_RETRYERROR	(1<<18)
377 #define NV_TX2_RETRYCOUNT_MASK	(0xF<<19)
378 #define NV_TX2_FORCED_INTERRUPT	(1<<30)
379 #define NV_TX2_DEFERRED		(1<<25)
380 #define NV_TX2_CARRIERLOST	(1<<26)
381 #define NV_TX2_LATECOLLISION	(1<<27)
382 #define NV_TX2_UNDERFLOW	(1<<28)
383 /* error and valid are the same for both */
384 #define NV_TX2_ERROR		(1<<30)
385 #define NV_TX2_VALID		(1<<31)
386 #define NV_TX2_TSO		(1<<28)
387 #define NV_TX2_TSO_SHIFT	14
388 #define NV_TX2_TSO_MAX_SHIFT	14
389 #define NV_TX2_TSO_MAX_SIZE	(1<<NV_TX2_TSO_MAX_SHIFT)
390 #define NV_TX2_CHECKSUM_L3	(1<<27)
391 #define NV_TX2_CHECKSUM_L4	(1<<26)
392 
393 #define NV_TX3_VLAN_TAG_PRESENT (1<<18)
394 
395 #define NV_RX_DESCRIPTORVALID	(1<<16)
396 #define NV_RX_MISSEDFRAME	(1<<17)
397 #define NV_RX_SUBTRACT1		(1<<18)
398 #define NV_RX_ERROR1		(1<<23)
399 #define NV_RX_ERROR2		(1<<24)
400 #define NV_RX_ERROR3		(1<<25)
401 #define NV_RX_ERROR4		(1<<26)
402 #define NV_RX_CRCERR		(1<<27)
403 #define NV_RX_OVERFLOW		(1<<28)
404 #define NV_RX_FRAMINGERR	(1<<29)
405 #define NV_RX_ERROR		(1<<30)
406 #define NV_RX_AVAIL		(1<<31)
407 #define NV_RX_ERROR_MASK	(NV_RX_ERROR1|NV_RX_ERROR2|NV_RX_ERROR3|NV_RX_ERROR4|NV_RX_CRCERR|NV_RX_OVERFLOW|NV_RX_FRAMINGERR)
408 
409 #define NV_RX2_CHECKSUMMASK	(0x1C000000)
410 #define NV_RX2_CHECKSUM_IP	(0x10000000)
411 #define NV_RX2_CHECKSUM_IP_TCP	(0x14000000)
412 #define NV_RX2_CHECKSUM_IP_UDP	(0x18000000)
413 #define NV_RX2_DESCRIPTORVALID	(1<<29)
414 #define NV_RX2_SUBTRACT1	(1<<25)
415 #define NV_RX2_ERROR1		(1<<18)
416 #define NV_RX2_ERROR2		(1<<19)
417 #define NV_RX2_ERROR3		(1<<20)
418 #define NV_RX2_ERROR4		(1<<21)
419 #define NV_RX2_CRCERR		(1<<22)
420 #define NV_RX2_OVERFLOW		(1<<23)
421 #define NV_RX2_FRAMINGERR	(1<<24)
422 /* error and avail are the same for both */
423 #define NV_RX2_ERROR		(1<<30)
424 #define NV_RX2_AVAIL		(1<<31)
425 #define NV_RX2_ERROR_MASK	(NV_RX2_ERROR1|NV_RX2_ERROR2|NV_RX2_ERROR3|NV_RX2_ERROR4|NV_RX2_CRCERR|NV_RX2_OVERFLOW|NV_RX2_FRAMINGERR)
426 
427 #define NV_RX3_VLAN_TAG_PRESENT (1<<16)
428 #define NV_RX3_VLAN_TAG_MASK	(0x0000FFFF)
429 
430 /* Miscellaneous hardware related defines: */
431 #define NV_PCI_REGSZ_VER1	0x270
432 #define NV_PCI_REGSZ_VER2	0x2d4
433 #define NV_PCI_REGSZ_VER3	0x604
434 #define NV_PCI_REGSZ_MAX	0x604
435 
436 /* various timeout delays: all in usec */
437 #define NV_TXRX_RESET_DELAY	4
438 #define NV_TXSTOP_DELAY1	10
439 #define NV_TXSTOP_DELAY1MAX	500000
440 #define NV_TXSTOP_DELAY2	100
441 #define NV_RXSTOP_DELAY1	10
442 #define NV_RXSTOP_DELAY1MAX	500000
443 #define NV_RXSTOP_DELAY2	100
444 #define NV_SETUP5_DELAY		5
445 #define NV_SETUP5_DELAYMAX	50000
446 #define NV_POWERUP_DELAY	5
447 #define NV_POWERUP_DELAYMAX	5000
448 #define NV_MIIBUSY_DELAY	50
449 #define NV_MIIPHY_DELAY	10
450 #define NV_MIIPHY_DELAYMAX	10000
451 #define NV_MAC_RESET_DELAY	64
452 
453 #define NV_WAKEUPPATTERNS	5
454 #define NV_WAKEUPMASKENTRIES	4
455 
456 /* General driver defaults */
457 #define NV_WATCHDOG_TIMEO	(5*HZ)
458 
459 #define RX_RING_DEFAULT		512
460 #define TX_RING_DEFAULT		256
461 #define RX_RING_MIN		128
462 #define TX_RING_MIN		64
463 #define RING_MAX_DESC_VER_1	1024
464 #define RING_MAX_DESC_VER_2_3	16384
465 
466 /* rx/tx mac addr + type + vlan + align + slack*/
467 #define NV_RX_HEADERS		(64)
468 /* even more slack. */
469 #define NV_RX_ALLOC_PAD		(64)
470 
471 /* maximum mtu size */
472 #define NV_PKTLIMIT_1	ETH_DATA_LEN	/* hard limit not known */
473 #define NV_PKTLIMIT_2	9100	/* Actual limit according to NVidia: 9202 */
474 
475 #define OOM_REFILL	(1+HZ/20)
476 #define POLL_WAIT	(1+HZ/100)
477 #define LINK_TIMEOUT	(3*HZ)
478 #define STATS_INTERVAL	(10*HZ)
479 
480 /*
481  * desc_ver values:
482  * The nic supports three different descriptor types:
483  * - DESC_VER_1: Original
484  * - DESC_VER_2: support for jumbo frames.
485  * - DESC_VER_3: 64-bit format.
486  */
487 #define DESC_VER_1	1
488 #define DESC_VER_2	2
489 #define DESC_VER_3	3
490 
491 /* PHY defines */
492 #define PHY_OUI_MARVELL		0x5043
493 #define PHY_OUI_CICADA		0x03f1
494 #define PHY_OUI_VITESSE		0x01c1
495 #define PHY_OUI_REALTEK		0x0732
496 #define PHY_OUI_REALTEK2	0x0020
497 #define PHYID1_OUI_MASK	0x03ff
498 #define PHYID1_OUI_SHFT	6
499 #define PHYID2_OUI_MASK	0xfc00
500 #define PHYID2_OUI_SHFT	10
501 #define PHYID2_MODEL_MASK		0x03f0
502 #define PHY_MODEL_REALTEK_8211		0x0110
503 #define PHY_REV_MASK			0x0001
504 #define PHY_REV_REALTEK_8211B		0x0000
505 #define PHY_REV_REALTEK_8211C		0x0001
506 #define PHY_MODEL_REALTEK_8201		0x0200
507 #define PHY_MODEL_MARVELL_E3016		0x0220
508 #define PHY_MARVELL_E3016_INITMASK	0x0300
509 #define PHY_CICADA_INIT1	0x0f000
510 #define PHY_CICADA_INIT2	0x0e00
511 #define PHY_CICADA_INIT3	0x01000
512 #define PHY_CICADA_INIT4	0x0200
513 #define PHY_CICADA_INIT5	0x0004
514 #define PHY_CICADA_INIT6	0x02000
515 #define PHY_VITESSE_INIT_REG1	0x1f
516 #define PHY_VITESSE_INIT_REG2	0x10
517 #define PHY_VITESSE_INIT_REG3	0x11
518 #define PHY_VITESSE_INIT_REG4	0x12
519 #define PHY_VITESSE_INIT_MSK1	0xc
520 #define PHY_VITESSE_INIT_MSK2	0x0180
521 #define PHY_VITESSE_INIT1	0x52b5
522 #define PHY_VITESSE_INIT2	0xaf8a
523 #define PHY_VITESSE_INIT3	0x8
524 #define PHY_VITESSE_INIT4	0x8f8a
525 #define PHY_VITESSE_INIT5	0xaf86
526 #define PHY_VITESSE_INIT6	0x8f86
527 #define PHY_VITESSE_INIT7	0xaf82
528 #define PHY_VITESSE_INIT8	0x0100
529 #define PHY_VITESSE_INIT9	0x8f82
530 #define PHY_VITESSE_INIT10	0x0
531 #define PHY_REALTEK_INIT_REG1	0x1f
532 #define PHY_REALTEK_INIT_REG2	0x19
533 #define PHY_REALTEK_INIT_REG3	0x13
534 #define PHY_REALTEK_INIT_REG4	0x14
535 #define PHY_REALTEK_INIT_REG5	0x18
536 #define PHY_REALTEK_INIT_REG6	0x11
537 #define PHY_REALTEK_INIT_REG7	0x01
538 #define PHY_REALTEK_INIT1	0x0000
539 #define PHY_REALTEK_INIT2	0x8e00
540 #define PHY_REALTEK_INIT3	0x0001
541 #define PHY_REALTEK_INIT4	0xad17
542 #define PHY_REALTEK_INIT5	0xfb54
543 #define PHY_REALTEK_INIT6	0xf5c7
544 #define PHY_REALTEK_INIT7	0x1000
545 #define PHY_REALTEK_INIT8	0x0003
546 #define PHY_REALTEK_INIT9	0x0008
547 #define PHY_REALTEK_INIT10	0x0005
548 #define PHY_REALTEK_INIT11	0x0200
549 #define PHY_REALTEK_INIT_MSK1	0x0003
550 
551 #define PHY_GIGABIT	0x0100
552 
553 #define PHY_TIMEOUT	0x1
554 #define PHY_ERROR	0x2
555 
556 #define PHY_100	0x1
557 #define PHY_1000	0x2
558 #define PHY_HALF	0x100
559 
560 #define NV_PAUSEFRAME_RX_CAPABLE 0x0001
561 #define NV_PAUSEFRAME_TX_CAPABLE 0x0002
562 #define NV_PAUSEFRAME_RX_ENABLE  0x0004
563 #define NV_PAUSEFRAME_TX_ENABLE  0x0008
564 #define NV_PAUSEFRAME_RX_REQ     0x0010
565 #define NV_PAUSEFRAME_TX_REQ     0x0020
566 #define NV_PAUSEFRAME_AUTONEG    0x0040
567 
568 /* MSI/MSI-X defines */
569 #define NV_MSI_X_MAX_VECTORS  8
570 #define NV_MSI_X_VECTORS_MASK 0x000f
571 #define NV_MSI_CAPABLE        0x0010
572 #define NV_MSI_X_CAPABLE      0x0020
573 #define NV_MSI_ENABLED        0x0040
574 #define NV_MSI_X_ENABLED      0x0080
575 
576 #define NV_MSI_X_VECTOR_ALL   0x0
577 #define NV_MSI_X_VECTOR_RX    0x0
578 #define NV_MSI_X_VECTOR_TX    0x1
579 #define NV_MSI_X_VECTOR_OTHER 0x2
580 
581 #define NV_MSI_PRIV_OFFSET 0x68
582 #define NV_MSI_PRIV_VALUE  0xffffffff
583 
584 #define NV_RESTART_TX         0x1
585 #define NV_RESTART_RX         0x2
586 
587 #define NV_TX_LIMIT_COUNT     16
588 
589 #define NV_DYNAMIC_THRESHOLD        4
590 #define NV_DYNAMIC_MAX_QUIET_COUNT  2048
591 
592 /* statistics */
593 struct nv_ethtool_str {
594 	char name[ETH_GSTRING_LEN];
595 };
596 
597 static const struct nv_ethtool_str nv_estats_str[] = {
598 	{ "tx_bytes" }, /* includes Ethernet FCS CRC */
599 	{ "tx_zero_rexmt" },
600 	{ "tx_one_rexmt" },
601 	{ "tx_many_rexmt" },
602 	{ "tx_late_collision" },
603 	{ "tx_fifo_errors" },
604 	{ "tx_carrier_errors" },
605 	{ "tx_excess_deferral" },
606 	{ "tx_retry_error" },
607 	{ "rx_frame_error" },
608 	{ "rx_extra_byte" },
609 	{ "rx_late_collision" },
610 	{ "rx_runt" },
611 	{ "rx_frame_too_long" },
612 	{ "rx_over_errors" },
613 	{ "rx_crc_errors" },
614 	{ "rx_frame_align_error" },
615 	{ "rx_length_error" },
616 	{ "rx_unicast" },
617 	{ "rx_multicast" },
618 	{ "rx_broadcast" },
619 	{ "rx_packets" },
620 	{ "rx_errors_total" },
621 	{ "tx_errors_total" },
622 
623 	/* version 2 stats */
624 	{ "tx_deferral" },
625 	{ "tx_packets" },
626 	{ "rx_bytes" }, /* includes Ethernet FCS CRC */
627 	{ "tx_pause" },
628 	{ "rx_pause" },
629 	{ "rx_drop_frame" },
630 
631 	/* version 3 stats */
632 	{ "tx_unicast" },
633 	{ "tx_multicast" },
634 	{ "tx_broadcast" }
635 };
636 
637 struct nv_ethtool_stats {
638 	u64 tx_bytes; /* should be ifconfig->tx_bytes + 4*tx_packets */
639 	u64 tx_zero_rexmt;
640 	u64 tx_one_rexmt;
641 	u64 tx_many_rexmt;
642 	u64 tx_late_collision;
643 	u64 tx_fifo_errors;
644 	u64 tx_carrier_errors;
645 	u64 tx_excess_deferral;
646 	u64 tx_retry_error;
647 	u64 rx_frame_error;
648 	u64 rx_extra_byte;
649 	u64 rx_late_collision;
650 	u64 rx_runt;
651 	u64 rx_frame_too_long;
652 	u64 rx_over_errors;
653 	u64 rx_crc_errors;
654 	u64 rx_frame_align_error;
655 	u64 rx_length_error;
656 	u64 rx_unicast;
657 	u64 rx_multicast;
658 	u64 rx_broadcast;
659 	u64 rx_packets; /* should be ifconfig->rx_packets */
660 	u64 rx_errors_total;
661 	u64 tx_errors_total;
662 
663 	/* version 2 stats */
664 	u64 tx_deferral;
665 	u64 tx_packets; /* should be ifconfig->tx_packets */
666 	u64 rx_bytes;   /* should be ifconfig->rx_bytes + 4*rx_packets */
667 	u64 tx_pause;
668 	u64 rx_pause;
669 	u64 rx_drop_frame;
670 
671 	/* version 3 stats */
672 	u64 tx_unicast;
673 	u64 tx_multicast;
674 	u64 tx_broadcast;
675 };
676 
677 #define NV_DEV_STATISTICS_V3_COUNT (sizeof(struct nv_ethtool_stats)/sizeof(u64))
678 #define NV_DEV_STATISTICS_V2_COUNT (NV_DEV_STATISTICS_V3_COUNT - 3)
679 #define NV_DEV_STATISTICS_V1_COUNT (NV_DEV_STATISTICS_V2_COUNT - 6)
680 
681 /* diagnostics */
682 #define NV_TEST_COUNT_BASE 3
683 #define NV_TEST_COUNT_EXTENDED 4
684 
685 static const struct nv_ethtool_str nv_etests_str[] = {
686 	{ "link      (online/offline)" },
687 	{ "register  (offline)       " },
688 	{ "interrupt (offline)       " },
689 	{ "loopback  (offline)       " }
690 };
691 
692 struct register_test {
693 	__u32 reg;
694 	__u32 mask;
695 };
696 
697 static const struct register_test nv_registers_test[] = {
698 	{ NvRegUnknownSetupReg6, 0x01 },
699 	{ NvRegMisc1, 0x03c },
700 	{ NvRegOffloadConfig, 0x03ff },
701 	{ NvRegMulticastAddrA, 0xffffffff },
702 	{ NvRegTxWatermark, 0x0ff },
703 	{ NvRegWakeUpFlags, 0x07777 },
704 	{ 0, 0 }
705 };
706 
707 struct nv_skb_map {
708 	struct sk_buff *skb;
709 	dma_addr_t dma;
710 	unsigned int dma_len:31;
711 	unsigned int dma_single:1;
712 	struct ring_desc_ex *first_tx_desc;
713 	struct nv_skb_map *next_tx_ctx;
714 };
715 
716 struct nv_txrx_stats {
717 	u64 stat_rx_packets;
718 	u64 stat_rx_bytes; /* not always available in HW */
719 	u64 stat_rx_missed_errors;
720 	u64 stat_rx_dropped;
721 	u64 stat_tx_packets; /* not always available in HW */
722 	u64 stat_tx_bytes;
723 	u64 stat_tx_dropped;
724 };
725 
726 #define nv_txrx_stats_inc(member) \
727 		__this_cpu_inc(np->txrx_stats->member)
728 #define nv_txrx_stats_add(member, count) \
729 		__this_cpu_add(np->txrx_stats->member, (count))
730 
731 /*
732  * SMP locking:
733  * All hardware access under netdev_priv(dev)->lock, except the performance
734  * critical parts:
735  * - rx is (pseudo-) lockless: it relies on the single-threading provided
736  *	by the arch code for interrupts.
737  * - tx setup is lockless: it relies on netif_tx_lock. Actual submission
738  *	needs netdev_priv(dev)->lock :-(
739  * - set_multicast_list: preparation lockless, relies on netif_tx_lock.
740  *
741  * Hardware stats updates are protected by hwstats_lock:
742  * - updated by nv_do_stats_poll (timer). This is meant to avoid
743  *   integer wraparound in the NIC stats registers, at low frequency
744  *   (0.1 Hz)
745  * - updated by nv_get_ethtool_stats + nv_get_stats64
746  *
747  * Software stats are accessed only through 64b synchronization points
748  * and are not subject to other synchronization techniques (single
749  * update thread on the TX or RX paths).
750  */
751 
752 /* in dev: base, irq */
753 struct fe_priv {
754 	spinlock_t lock;
755 
756 	struct net_device *dev;
757 	struct napi_struct napi;
758 
759 	/* hardware stats are updated in syscall and timer */
760 	spinlock_t hwstats_lock;
761 	struct nv_ethtool_stats estats;
762 
763 	int in_shutdown;
764 	u32 linkspeed;
765 	int duplex;
766 	int autoneg;
767 	int fixed_mode;
768 	int phyaddr;
769 	int wolenabled;
770 	unsigned int phy_oui;
771 	unsigned int phy_model;
772 	unsigned int phy_rev;
773 	u16 gigabit;
774 	int intr_test;
775 	int recover_error;
776 	int quiet_count;
777 
778 	/* General data: RO fields */
779 	dma_addr_t ring_addr;
780 	struct pci_dev *pci_dev;
781 	u32 orig_mac[2];
782 	u32 events;
783 	u32 irqmask;
784 	u32 desc_ver;
785 	u32 txrxctl_bits;
786 	u32 vlanctl_bits;
787 	u32 driver_data;
788 	u32 device_id;
789 	u32 register_size;
790 	u32 mac_in_use;
791 	int mgmt_version;
792 	int mgmt_sema;
793 
794 	void __iomem *base;
795 
796 	/* rx specific fields.
797 	 * Locking: Within irq hander or disable_irq+spin_lock(&np->lock);
798 	 */
799 	union ring_type get_rx, put_rx, last_rx;
800 	struct nv_skb_map *get_rx_ctx, *put_rx_ctx;
801 	struct nv_skb_map *last_rx_ctx;
802 	struct nv_skb_map *rx_skb;
803 
804 	union ring_type rx_ring;
805 	unsigned int rx_buf_sz;
806 	unsigned int pkt_limit;
807 	struct timer_list oom_kick;
808 	struct timer_list nic_poll;
809 	struct timer_list stats_poll;
810 	u32 nic_poll_irq;
811 	int rx_ring_size;
812 
813 	/* RX software stats */
814 	struct u64_stats_sync swstats_rx_syncp;
815 	struct nv_txrx_stats __percpu *txrx_stats;
816 
817 	/* media detection workaround.
818 	 * Locking: Within irq hander or disable_irq+spin_lock(&np->lock);
819 	 */
820 	int need_linktimer;
821 	unsigned long link_timeout;
822 	/*
823 	 * tx specific fields.
824 	 */
825 	union ring_type get_tx, put_tx, last_tx;
826 	struct nv_skb_map *get_tx_ctx, *put_tx_ctx;
827 	struct nv_skb_map *last_tx_ctx;
828 	struct nv_skb_map *tx_skb;
829 
830 	union ring_type tx_ring;
831 	u32 tx_flags;
832 	int tx_ring_size;
833 	int tx_limit;
834 	u32 tx_pkts_in_progress;
835 	struct nv_skb_map *tx_change_owner;
836 	struct nv_skb_map *tx_end_flip;
837 	int tx_stop;
838 
839 	/* TX software stats */
840 	struct u64_stats_sync swstats_tx_syncp;
841 
842 	/* msi/msi-x fields */
843 	u32 msi_flags;
844 	struct msix_entry msi_x_entry[NV_MSI_X_MAX_VECTORS];
845 
846 	/* flow control */
847 	u32 pause_flags;
848 
849 	/* power saved state */
850 	u32 saved_config_space[NV_PCI_REGSZ_MAX/4];
851 
852 	/* for different msi-x irq type */
853 	char name_rx[IFNAMSIZ + 3];       /* -rx    */
854 	char name_tx[IFNAMSIZ + 3];       /* -tx    */
855 	char name_other[IFNAMSIZ + 6];    /* -other */
856 };
857 
858 /*
859  * Maximum number of loops until we assume that a bit in the irq mask
860  * is stuck. Overridable with module param.
861  */
862 static int max_interrupt_work = 4;
863 
864 /*
865  * Optimization can be either throuput mode or cpu mode
866  *
867  * Throughput Mode: Every tx and rx packet will generate an interrupt.
868  * CPU Mode: Interrupts are controlled by a timer.
869  */
870 enum {
871 	NV_OPTIMIZATION_MODE_THROUGHPUT,
872 	NV_OPTIMIZATION_MODE_CPU,
873 	NV_OPTIMIZATION_MODE_DYNAMIC
874 };
875 static int optimization_mode = NV_OPTIMIZATION_MODE_DYNAMIC;
876 
877 /*
878  * Poll interval for timer irq
879  *
880  * This interval determines how frequent an interrupt is generated.
881  * The is value is determined by [(time_in_micro_secs * 100) / (2^10)]
882  * Min = 0, and Max = 65535
883  */
884 static int poll_interval = -1;
885 
886 /*
887  * MSI interrupts
888  */
889 enum {
890 	NV_MSI_INT_DISABLED,
891 	NV_MSI_INT_ENABLED
892 };
893 static int msi = NV_MSI_INT_ENABLED;
894 
895 /*
896  * MSIX interrupts
897  */
898 enum {
899 	NV_MSIX_INT_DISABLED,
900 	NV_MSIX_INT_ENABLED
901 };
902 static int msix = NV_MSIX_INT_ENABLED;
903 
904 /*
905  * DMA 64bit
906  */
907 enum {
908 	NV_DMA_64BIT_DISABLED,
909 	NV_DMA_64BIT_ENABLED
910 };
911 static int dma_64bit = NV_DMA_64BIT_ENABLED;
912 
913 /*
914  * Debug output control for tx_timeout
915  */
916 static bool debug_tx_timeout = false;
917 
918 /*
919  * Crossover Detection
920  * Realtek 8201 phy + some OEM boards do not work properly.
921  */
922 enum {
923 	NV_CROSSOVER_DETECTION_DISABLED,
924 	NV_CROSSOVER_DETECTION_ENABLED
925 };
926 static int phy_cross = NV_CROSSOVER_DETECTION_DISABLED;
927 
928 /*
929  * Power down phy when interface is down (persists through reboot;
930  * older Linux and other OSes may not power it up again)
931  */
932 static int phy_power_down;
933 
get_nvpriv(struct net_device * dev)934 static inline struct fe_priv *get_nvpriv(struct net_device *dev)
935 {
936 	return netdev_priv(dev);
937 }
938 
get_hwbase(struct net_device * dev)939 static inline u8 __iomem *get_hwbase(struct net_device *dev)
940 {
941 	return ((struct fe_priv *)netdev_priv(dev))->base;
942 }
943 
pci_push(u8 __iomem * base)944 static inline void pci_push(u8 __iomem *base)
945 {
946 	/* force out pending posted writes */
947 	readl(base);
948 }
949 
nv_descr_getlength(struct ring_desc * prd,u32 v)950 static inline u32 nv_descr_getlength(struct ring_desc *prd, u32 v)
951 {
952 	return le32_to_cpu(prd->flaglen)
953 		& ((v == DESC_VER_1) ? LEN_MASK_V1 : LEN_MASK_V2);
954 }
955 
nv_descr_getlength_ex(struct ring_desc_ex * prd,u32 v)956 static inline u32 nv_descr_getlength_ex(struct ring_desc_ex *prd, u32 v)
957 {
958 	return le32_to_cpu(prd->flaglen) & LEN_MASK_V2;
959 }
960 
nv_optimized(struct fe_priv * np)961 static bool nv_optimized(struct fe_priv *np)
962 {
963 	if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2)
964 		return false;
965 	return true;
966 }
967 
reg_delay(struct net_device * dev,int offset,u32 mask,u32 target,int delay,int delaymax)968 static int reg_delay(struct net_device *dev, int offset, u32 mask, u32 target,
969 		     int delay, int delaymax)
970 {
971 	u8 __iomem *base = get_hwbase(dev);
972 
973 	pci_push(base);
974 	do {
975 		udelay(delay);
976 		delaymax -= delay;
977 		if (delaymax < 0)
978 			return 1;
979 	} while ((readl(base + offset) & mask) != target);
980 	return 0;
981 }
982 
983 #define NV_SETUP_RX_RING 0x01
984 #define NV_SETUP_TX_RING 0x02
985 
dma_low(dma_addr_t addr)986 static inline u32 dma_low(dma_addr_t addr)
987 {
988 	return addr;
989 }
990 
dma_high(dma_addr_t addr)991 static inline u32 dma_high(dma_addr_t addr)
992 {
993 	return addr>>31>>1;	/* 0 if 32bit, shift down by 32 if 64bit */
994 }
995 
setup_hw_rings(struct net_device * dev,int rxtx_flags)996 static void setup_hw_rings(struct net_device *dev, int rxtx_flags)
997 {
998 	struct fe_priv *np = get_nvpriv(dev);
999 	u8 __iomem *base = get_hwbase(dev);
1000 
1001 	if (!nv_optimized(np)) {
1002 		if (rxtx_flags & NV_SETUP_RX_RING)
1003 			writel(dma_low(np->ring_addr), base + NvRegRxRingPhysAddr);
1004 		if (rxtx_flags & NV_SETUP_TX_RING)
1005 			writel(dma_low(np->ring_addr + np->rx_ring_size*sizeof(struct ring_desc)), base + NvRegTxRingPhysAddr);
1006 	} else {
1007 		if (rxtx_flags & NV_SETUP_RX_RING) {
1008 			writel(dma_low(np->ring_addr), base + NvRegRxRingPhysAddr);
1009 			writel(dma_high(np->ring_addr), base + NvRegRxRingPhysAddrHigh);
1010 		}
1011 		if (rxtx_flags & NV_SETUP_TX_RING) {
1012 			writel(dma_low(np->ring_addr + np->rx_ring_size*sizeof(struct ring_desc_ex)), base + NvRegTxRingPhysAddr);
1013 			writel(dma_high(np->ring_addr + np->rx_ring_size*sizeof(struct ring_desc_ex)), base + NvRegTxRingPhysAddrHigh);
1014 		}
1015 	}
1016 }
1017 
free_rings(struct net_device * dev)1018 static void free_rings(struct net_device *dev)
1019 {
1020 	struct fe_priv *np = get_nvpriv(dev);
1021 
1022 	if (!nv_optimized(np)) {
1023 		if (np->rx_ring.orig)
1024 			dma_free_coherent(&np->pci_dev->dev,
1025 					  sizeof(struct ring_desc) *
1026 					  (np->rx_ring_size +
1027 					  np->tx_ring_size),
1028 					  np->rx_ring.orig, np->ring_addr);
1029 	} else {
1030 		if (np->rx_ring.ex)
1031 			dma_free_coherent(&np->pci_dev->dev,
1032 					  sizeof(struct ring_desc_ex) *
1033 					  (np->rx_ring_size +
1034 					  np->tx_ring_size),
1035 					  np->rx_ring.ex, np->ring_addr);
1036 	}
1037 	kfree(np->rx_skb);
1038 	kfree(np->tx_skb);
1039 }
1040 
using_multi_irqs(struct net_device * dev)1041 static int using_multi_irqs(struct net_device *dev)
1042 {
1043 	struct fe_priv *np = get_nvpriv(dev);
1044 
1045 	if (!(np->msi_flags & NV_MSI_X_ENABLED) ||
1046 	    ((np->msi_flags & NV_MSI_X_VECTORS_MASK) == 0x1))
1047 		return 0;
1048 	else
1049 		return 1;
1050 }
1051 
nv_txrx_gate(struct net_device * dev,bool gate)1052 static void nv_txrx_gate(struct net_device *dev, bool gate)
1053 {
1054 	struct fe_priv *np = get_nvpriv(dev);
1055 	u8 __iomem *base = get_hwbase(dev);
1056 	u32 powerstate;
1057 
1058 	if (!np->mac_in_use &&
1059 	    (np->driver_data & DEV_HAS_POWER_CNTRL)) {
1060 		powerstate = readl(base + NvRegPowerState2);
1061 		if (gate)
1062 			powerstate |= NVREG_POWERSTATE2_GATE_CLOCKS;
1063 		else
1064 			powerstate &= ~NVREG_POWERSTATE2_GATE_CLOCKS;
1065 		writel(powerstate, base + NvRegPowerState2);
1066 	}
1067 }
1068 
nv_enable_irq(struct net_device * dev)1069 static void nv_enable_irq(struct net_device *dev)
1070 {
1071 	struct fe_priv *np = get_nvpriv(dev);
1072 
1073 	if (!using_multi_irqs(dev)) {
1074 		if (np->msi_flags & NV_MSI_X_ENABLED)
1075 			enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector);
1076 		else
1077 			enable_irq(np->pci_dev->irq);
1078 	} else {
1079 		enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector);
1080 		enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_TX].vector);
1081 		enable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_OTHER].vector);
1082 	}
1083 }
1084 
nv_disable_irq(struct net_device * dev)1085 static void nv_disable_irq(struct net_device *dev)
1086 {
1087 	struct fe_priv *np = get_nvpriv(dev);
1088 
1089 	if (!using_multi_irqs(dev)) {
1090 		if (np->msi_flags & NV_MSI_X_ENABLED)
1091 			disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector);
1092 		else
1093 			disable_irq(np->pci_dev->irq);
1094 	} else {
1095 		disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector);
1096 		disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_TX].vector);
1097 		disable_irq(np->msi_x_entry[NV_MSI_X_VECTOR_OTHER].vector);
1098 	}
1099 }
1100 
1101 /* In MSIX mode, a write to irqmask behaves as XOR */
nv_enable_hw_interrupts(struct net_device * dev,u32 mask)1102 static void nv_enable_hw_interrupts(struct net_device *dev, u32 mask)
1103 {
1104 	u8 __iomem *base = get_hwbase(dev);
1105 
1106 	writel(mask, base + NvRegIrqMask);
1107 }
1108 
nv_disable_hw_interrupts(struct net_device * dev,u32 mask)1109 static void nv_disable_hw_interrupts(struct net_device *dev, u32 mask)
1110 {
1111 	struct fe_priv *np = get_nvpriv(dev);
1112 	u8 __iomem *base = get_hwbase(dev);
1113 
1114 	if (np->msi_flags & NV_MSI_X_ENABLED) {
1115 		writel(mask, base + NvRegIrqMask);
1116 	} else {
1117 		if (np->msi_flags & NV_MSI_ENABLED)
1118 			writel(0, base + NvRegMSIIrqMask);
1119 		writel(0, base + NvRegIrqMask);
1120 	}
1121 }
1122 
nv_napi_enable(struct net_device * dev)1123 static void nv_napi_enable(struct net_device *dev)
1124 {
1125 	struct fe_priv *np = get_nvpriv(dev);
1126 
1127 	napi_enable(&np->napi);
1128 }
1129 
nv_napi_disable(struct net_device * dev)1130 static void nv_napi_disable(struct net_device *dev)
1131 {
1132 	struct fe_priv *np = get_nvpriv(dev);
1133 
1134 	napi_disable(&np->napi);
1135 }
1136 
1137 #define MII_READ	(-1)
1138 /* mii_rw: read/write a register on the PHY.
1139  *
1140  * Caller must guarantee serialization
1141  */
mii_rw(struct net_device * dev,int addr,int miireg,int value)1142 static int mii_rw(struct net_device *dev, int addr, int miireg, int value)
1143 {
1144 	u8 __iomem *base = get_hwbase(dev);
1145 	u32 reg;
1146 	int retval;
1147 
1148 	writel(NVREG_MIISTAT_MASK_RW, base + NvRegMIIStatus);
1149 
1150 	reg = readl(base + NvRegMIIControl);
1151 	if (reg & NVREG_MIICTL_INUSE) {
1152 		writel(NVREG_MIICTL_INUSE, base + NvRegMIIControl);
1153 		udelay(NV_MIIBUSY_DELAY);
1154 	}
1155 
1156 	reg = (addr << NVREG_MIICTL_ADDRSHIFT) | miireg;
1157 	if (value != MII_READ) {
1158 		writel(value, base + NvRegMIIData);
1159 		reg |= NVREG_MIICTL_WRITE;
1160 	}
1161 	writel(reg, base + NvRegMIIControl);
1162 
1163 	if (reg_delay(dev, NvRegMIIControl, NVREG_MIICTL_INUSE, 0,
1164 			NV_MIIPHY_DELAY, NV_MIIPHY_DELAYMAX)) {
1165 		retval = -1;
1166 	} else if (value != MII_READ) {
1167 		/* it was a write operation - fewer failures are detectable */
1168 		retval = 0;
1169 	} else if (readl(base + NvRegMIIStatus) & NVREG_MIISTAT_ERROR) {
1170 		retval = -1;
1171 	} else {
1172 		retval = readl(base + NvRegMIIData);
1173 	}
1174 
1175 	return retval;
1176 }
1177 
phy_reset(struct net_device * dev,u32 bmcr_setup)1178 static int phy_reset(struct net_device *dev, u32 bmcr_setup)
1179 {
1180 	struct fe_priv *np = netdev_priv(dev);
1181 	u32 miicontrol;
1182 	unsigned int tries = 0;
1183 
1184 	miicontrol = BMCR_RESET | bmcr_setup;
1185 	if (mii_rw(dev, np->phyaddr, MII_BMCR, miicontrol))
1186 		return -1;
1187 
1188 	/* wait for 500ms */
1189 	msleep(500);
1190 
1191 	/* must wait till reset is deasserted */
1192 	while (miicontrol & BMCR_RESET) {
1193 		usleep_range(10000, 20000);
1194 		miicontrol = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
1195 		/* FIXME: 100 tries seem excessive */
1196 		if (tries++ > 100)
1197 			return -1;
1198 	}
1199 	return 0;
1200 }
1201 
init_realtek_8211b(struct net_device * dev,struct fe_priv * np)1202 static int init_realtek_8211b(struct net_device *dev, struct fe_priv *np)
1203 {
1204 	static const struct {
1205 		int reg;
1206 		int init;
1207 	} ri[] = {
1208 		{ PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT1 },
1209 		{ PHY_REALTEK_INIT_REG2, PHY_REALTEK_INIT2 },
1210 		{ PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT3 },
1211 		{ PHY_REALTEK_INIT_REG3, PHY_REALTEK_INIT4 },
1212 		{ PHY_REALTEK_INIT_REG4, PHY_REALTEK_INIT5 },
1213 		{ PHY_REALTEK_INIT_REG5, PHY_REALTEK_INIT6 },
1214 		{ PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT1 },
1215 	};
1216 	int i;
1217 
1218 	for (i = 0; i < ARRAY_SIZE(ri); i++) {
1219 		if (mii_rw(dev, np->phyaddr, ri[i].reg, ri[i].init))
1220 			return PHY_ERROR;
1221 	}
1222 
1223 	return 0;
1224 }
1225 
init_realtek_8211c(struct net_device * dev,struct fe_priv * np)1226 static int init_realtek_8211c(struct net_device *dev, struct fe_priv *np)
1227 {
1228 	u32 reg;
1229 	u8 __iomem *base = get_hwbase(dev);
1230 	u32 powerstate = readl(base + NvRegPowerState2);
1231 
1232 	/* need to perform hw phy reset */
1233 	powerstate |= NVREG_POWERSTATE2_PHY_RESET;
1234 	writel(powerstate, base + NvRegPowerState2);
1235 	msleep(25);
1236 
1237 	powerstate &= ~NVREG_POWERSTATE2_PHY_RESET;
1238 	writel(powerstate, base + NvRegPowerState2);
1239 	msleep(25);
1240 
1241 	reg = mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG6, MII_READ);
1242 	reg |= PHY_REALTEK_INIT9;
1243 	if (mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG6, reg))
1244 		return PHY_ERROR;
1245 	if (mii_rw(dev, np->phyaddr,
1246 		   PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT10))
1247 		return PHY_ERROR;
1248 	reg = mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG7, MII_READ);
1249 	if (!(reg & PHY_REALTEK_INIT11)) {
1250 		reg |= PHY_REALTEK_INIT11;
1251 		if (mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG7, reg))
1252 			return PHY_ERROR;
1253 	}
1254 	if (mii_rw(dev, np->phyaddr,
1255 		   PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT1))
1256 		return PHY_ERROR;
1257 
1258 	return 0;
1259 }
1260 
init_realtek_8201(struct net_device * dev,struct fe_priv * np)1261 static int init_realtek_8201(struct net_device *dev, struct fe_priv *np)
1262 {
1263 	u32 phy_reserved;
1264 
1265 	if (np->driver_data & DEV_NEED_PHY_INIT_FIX) {
1266 		phy_reserved = mii_rw(dev, np->phyaddr,
1267 				      PHY_REALTEK_INIT_REG6, MII_READ);
1268 		phy_reserved |= PHY_REALTEK_INIT7;
1269 		if (mii_rw(dev, np->phyaddr,
1270 			   PHY_REALTEK_INIT_REG6, phy_reserved))
1271 			return PHY_ERROR;
1272 	}
1273 
1274 	return 0;
1275 }
1276 
init_realtek_8201_cross(struct net_device * dev,struct fe_priv * np)1277 static int init_realtek_8201_cross(struct net_device *dev, struct fe_priv *np)
1278 {
1279 	u32 phy_reserved;
1280 
1281 	if (phy_cross == NV_CROSSOVER_DETECTION_DISABLED) {
1282 		if (mii_rw(dev, np->phyaddr,
1283 			   PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT3))
1284 			return PHY_ERROR;
1285 		phy_reserved = mii_rw(dev, np->phyaddr,
1286 				      PHY_REALTEK_INIT_REG2, MII_READ);
1287 		phy_reserved &= ~PHY_REALTEK_INIT_MSK1;
1288 		phy_reserved |= PHY_REALTEK_INIT3;
1289 		if (mii_rw(dev, np->phyaddr,
1290 			   PHY_REALTEK_INIT_REG2, phy_reserved))
1291 			return PHY_ERROR;
1292 		if (mii_rw(dev, np->phyaddr,
1293 			   PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT1))
1294 			return PHY_ERROR;
1295 	}
1296 
1297 	return 0;
1298 }
1299 
init_cicada(struct net_device * dev,struct fe_priv * np,u32 phyinterface)1300 static int init_cicada(struct net_device *dev, struct fe_priv *np,
1301 		       u32 phyinterface)
1302 {
1303 	u32 phy_reserved;
1304 
1305 	if (phyinterface & PHY_RGMII) {
1306 		phy_reserved = mii_rw(dev, np->phyaddr, MII_RESV1, MII_READ);
1307 		phy_reserved &= ~(PHY_CICADA_INIT1 | PHY_CICADA_INIT2);
1308 		phy_reserved |= (PHY_CICADA_INIT3 | PHY_CICADA_INIT4);
1309 		if (mii_rw(dev, np->phyaddr, MII_RESV1, phy_reserved))
1310 			return PHY_ERROR;
1311 		phy_reserved = mii_rw(dev, np->phyaddr, MII_NCONFIG, MII_READ);
1312 		phy_reserved |= PHY_CICADA_INIT5;
1313 		if (mii_rw(dev, np->phyaddr, MII_NCONFIG, phy_reserved))
1314 			return PHY_ERROR;
1315 	}
1316 	phy_reserved = mii_rw(dev, np->phyaddr, MII_SREVISION, MII_READ);
1317 	phy_reserved |= PHY_CICADA_INIT6;
1318 	if (mii_rw(dev, np->phyaddr, MII_SREVISION, phy_reserved))
1319 		return PHY_ERROR;
1320 
1321 	return 0;
1322 }
1323 
init_vitesse(struct net_device * dev,struct fe_priv * np)1324 static int init_vitesse(struct net_device *dev, struct fe_priv *np)
1325 {
1326 	u32 phy_reserved;
1327 
1328 	if (mii_rw(dev, np->phyaddr,
1329 		   PHY_VITESSE_INIT_REG1, PHY_VITESSE_INIT1))
1330 		return PHY_ERROR;
1331 	if (mii_rw(dev, np->phyaddr,
1332 		   PHY_VITESSE_INIT_REG2, PHY_VITESSE_INIT2))
1333 		return PHY_ERROR;
1334 	phy_reserved = mii_rw(dev, np->phyaddr,
1335 			      PHY_VITESSE_INIT_REG4, MII_READ);
1336 	if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG4, phy_reserved))
1337 		return PHY_ERROR;
1338 	phy_reserved = mii_rw(dev, np->phyaddr,
1339 			      PHY_VITESSE_INIT_REG3, MII_READ);
1340 	phy_reserved &= ~PHY_VITESSE_INIT_MSK1;
1341 	phy_reserved |= PHY_VITESSE_INIT3;
1342 	if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG3, phy_reserved))
1343 		return PHY_ERROR;
1344 	if (mii_rw(dev, np->phyaddr,
1345 		   PHY_VITESSE_INIT_REG2, PHY_VITESSE_INIT4))
1346 		return PHY_ERROR;
1347 	if (mii_rw(dev, np->phyaddr,
1348 		   PHY_VITESSE_INIT_REG2, PHY_VITESSE_INIT5))
1349 		return PHY_ERROR;
1350 	phy_reserved = mii_rw(dev, np->phyaddr,
1351 			      PHY_VITESSE_INIT_REG4, MII_READ);
1352 	phy_reserved &= ~PHY_VITESSE_INIT_MSK1;
1353 	phy_reserved |= PHY_VITESSE_INIT3;
1354 	if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG4, phy_reserved))
1355 		return PHY_ERROR;
1356 	phy_reserved = mii_rw(dev, np->phyaddr,
1357 			      PHY_VITESSE_INIT_REG3, MII_READ);
1358 	if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG3, phy_reserved))
1359 		return PHY_ERROR;
1360 	if (mii_rw(dev, np->phyaddr,
1361 		   PHY_VITESSE_INIT_REG2, PHY_VITESSE_INIT6))
1362 		return PHY_ERROR;
1363 	if (mii_rw(dev, np->phyaddr,
1364 		   PHY_VITESSE_INIT_REG2, PHY_VITESSE_INIT7))
1365 		return PHY_ERROR;
1366 	phy_reserved = mii_rw(dev, np->phyaddr,
1367 			      PHY_VITESSE_INIT_REG4, MII_READ);
1368 	if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG4, phy_reserved))
1369 		return PHY_ERROR;
1370 	phy_reserved = mii_rw(dev, np->phyaddr,
1371 			      PHY_VITESSE_INIT_REG3, MII_READ);
1372 	phy_reserved &= ~PHY_VITESSE_INIT_MSK2;
1373 	phy_reserved |= PHY_VITESSE_INIT8;
1374 	if (mii_rw(dev, np->phyaddr, PHY_VITESSE_INIT_REG3, phy_reserved))
1375 		return PHY_ERROR;
1376 	if (mii_rw(dev, np->phyaddr,
1377 		   PHY_VITESSE_INIT_REG2, PHY_VITESSE_INIT9))
1378 		return PHY_ERROR;
1379 	if (mii_rw(dev, np->phyaddr,
1380 		   PHY_VITESSE_INIT_REG1, PHY_VITESSE_INIT10))
1381 		return PHY_ERROR;
1382 
1383 	return 0;
1384 }
1385 
phy_init(struct net_device * dev)1386 static int phy_init(struct net_device *dev)
1387 {
1388 	struct fe_priv *np = get_nvpriv(dev);
1389 	u8 __iomem *base = get_hwbase(dev);
1390 	u32 phyinterface;
1391 	u32 mii_status, mii_control, mii_control_1000, reg;
1392 
1393 	/* phy errata for E3016 phy */
1394 	if (np->phy_model == PHY_MODEL_MARVELL_E3016) {
1395 		reg = mii_rw(dev, np->phyaddr, MII_NCONFIG, MII_READ);
1396 		reg &= ~PHY_MARVELL_E3016_INITMASK;
1397 		if (mii_rw(dev, np->phyaddr, MII_NCONFIG, reg)) {
1398 			netdev_info(dev, "%s: phy write to errata reg failed\n",
1399 				    pci_name(np->pci_dev));
1400 			return PHY_ERROR;
1401 		}
1402 	}
1403 	if (np->phy_oui == PHY_OUI_REALTEK) {
1404 		if (np->phy_model == PHY_MODEL_REALTEK_8211 &&
1405 		    np->phy_rev == PHY_REV_REALTEK_8211B) {
1406 			if (init_realtek_8211b(dev, np)) {
1407 				netdev_info(dev, "%s: phy init failed\n",
1408 					    pci_name(np->pci_dev));
1409 				return PHY_ERROR;
1410 			}
1411 		} else if (np->phy_model == PHY_MODEL_REALTEK_8211 &&
1412 			   np->phy_rev == PHY_REV_REALTEK_8211C) {
1413 			if (init_realtek_8211c(dev, np)) {
1414 				netdev_info(dev, "%s: phy init failed\n",
1415 					    pci_name(np->pci_dev));
1416 				return PHY_ERROR;
1417 			}
1418 		} else if (np->phy_model == PHY_MODEL_REALTEK_8201) {
1419 			if (init_realtek_8201(dev, np)) {
1420 				netdev_info(dev, "%s: phy init failed\n",
1421 					    pci_name(np->pci_dev));
1422 				return PHY_ERROR;
1423 			}
1424 		}
1425 	}
1426 
1427 	/* set advertise register */
1428 	reg = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ);
1429 	reg |= (ADVERTISE_10HALF | ADVERTISE_10FULL |
1430 		ADVERTISE_100HALF | ADVERTISE_100FULL |
1431 		ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
1432 	if (mii_rw(dev, np->phyaddr, MII_ADVERTISE, reg)) {
1433 		netdev_info(dev, "%s: phy write to advertise failed\n",
1434 			    pci_name(np->pci_dev));
1435 		return PHY_ERROR;
1436 	}
1437 
1438 	/* get phy interface type */
1439 	phyinterface = readl(base + NvRegPhyInterface);
1440 
1441 	/* see if gigabit phy */
1442 	mii_status = mii_rw(dev, np->phyaddr, MII_BMSR, MII_READ);
1443 	if (mii_status & PHY_GIGABIT) {
1444 		np->gigabit = PHY_GIGABIT;
1445 		mii_control_1000 = mii_rw(dev, np->phyaddr,
1446 					  MII_CTRL1000, MII_READ);
1447 		mii_control_1000 &= ~ADVERTISE_1000HALF;
1448 		if (phyinterface & PHY_RGMII)
1449 			mii_control_1000 |= ADVERTISE_1000FULL;
1450 		else
1451 			mii_control_1000 &= ~ADVERTISE_1000FULL;
1452 
1453 		if (mii_rw(dev, np->phyaddr, MII_CTRL1000, mii_control_1000)) {
1454 			netdev_info(dev, "%s: phy init failed\n",
1455 				    pci_name(np->pci_dev));
1456 			return PHY_ERROR;
1457 		}
1458 	} else
1459 		np->gigabit = 0;
1460 
1461 	mii_control = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
1462 	mii_control |= BMCR_ANENABLE;
1463 
1464 	if (np->phy_oui == PHY_OUI_REALTEK &&
1465 	    np->phy_model == PHY_MODEL_REALTEK_8211 &&
1466 	    np->phy_rev == PHY_REV_REALTEK_8211C) {
1467 		/* start autoneg since we already performed hw reset above */
1468 		mii_control |= BMCR_ANRESTART;
1469 		if (mii_rw(dev, np->phyaddr, MII_BMCR, mii_control)) {
1470 			netdev_info(dev, "%s: phy init failed\n",
1471 				    pci_name(np->pci_dev));
1472 			return PHY_ERROR;
1473 		}
1474 	} else {
1475 		/* reset the phy
1476 		 * (certain phys need bmcr to be setup with reset)
1477 		 */
1478 		if (phy_reset(dev, mii_control)) {
1479 			netdev_info(dev, "%s: phy reset failed\n",
1480 				    pci_name(np->pci_dev));
1481 			return PHY_ERROR;
1482 		}
1483 	}
1484 
1485 	/* phy vendor specific configuration */
1486 	if (np->phy_oui == PHY_OUI_CICADA) {
1487 		if (init_cicada(dev, np, phyinterface)) {
1488 			netdev_info(dev, "%s: phy init failed\n",
1489 				    pci_name(np->pci_dev));
1490 			return PHY_ERROR;
1491 		}
1492 	} else if (np->phy_oui == PHY_OUI_VITESSE) {
1493 		if (init_vitesse(dev, np)) {
1494 			netdev_info(dev, "%s: phy init failed\n",
1495 				    pci_name(np->pci_dev));
1496 			return PHY_ERROR;
1497 		}
1498 	} else if (np->phy_oui == PHY_OUI_REALTEK) {
1499 		if (np->phy_model == PHY_MODEL_REALTEK_8211 &&
1500 		    np->phy_rev == PHY_REV_REALTEK_8211B) {
1501 			/* reset could have cleared these out, set them back */
1502 			if (init_realtek_8211b(dev, np)) {
1503 				netdev_info(dev, "%s: phy init failed\n",
1504 					    pci_name(np->pci_dev));
1505 				return PHY_ERROR;
1506 			}
1507 		} else if (np->phy_model == PHY_MODEL_REALTEK_8201) {
1508 			if (init_realtek_8201(dev, np) ||
1509 			    init_realtek_8201_cross(dev, np)) {
1510 				netdev_info(dev, "%s: phy init failed\n",
1511 					    pci_name(np->pci_dev));
1512 				return PHY_ERROR;
1513 			}
1514 		}
1515 	}
1516 
1517 	/* some phys clear out pause advertisement on reset, set it back */
1518 	mii_rw(dev, np->phyaddr, MII_ADVERTISE, reg);
1519 
1520 	/* restart auto negotiation, power down phy */
1521 	mii_control = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
1522 	mii_control |= (BMCR_ANRESTART | BMCR_ANENABLE);
1523 	if (phy_power_down)
1524 		mii_control |= BMCR_PDOWN;
1525 	if (mii_rw(dev, np->phyaddr, MII_BMCR, mii_control))
1526 		return PHY_ERROR;
1527 
1528 	return 0;
1529 }
1530 
nv_start_rx(struct net_device * dev)1531 static void nv_start_rx(struct net_device *dev)
1532 {
1533 	struct fe_priv *np = netdev_priv(dev);
1534 	u8 __iomem *base = get_hwbase(dev);
1535 	u32 rx_ctrl = readl(base + NvRegReceiverControl);
1536 
1537 	/* Already running? Stop it. */
1538 	if ((readl(base + NvRegReceiverControl) & NVREG_RCVCTL_START) && !np->mac_in_use) {
1539 		rx_ctrl &= ~NVREG_RCVCTL_START;
1540 		writel(rx_ctrl, base + NvRegReceiverControl);
1541 		pci_push(base);
1542 	}
1543 	writel(np->linkspeed, base + NvRegLinkSpeed);
1544 	pci_push(base);
1545 	rx_ctrl |= NVREG_RCVCTL_START;
1546 	if (np->mac_in_use)
1547 		rx_ctrl &= ~NVREG_RCVCTL_RX_PATH_EN;
1548 	writel(rx_ctrl, base + NvRegReceiverControl);
1549 	pci_push(base);
1550 }
1551 
nv_stop_rx(struct net_device * dev)1552 static void nv_stop_rx(struct net_device *dev)
1553 {
1554 	struct fe_priv *np = netdev_priv(dev);
1555 	u8 __iomem *base = get_hwbase(dev);
1556 	u32 rx_ctrl = readl(base + NvRegReceiverControl);
1557 
1558 	if (!np->mac_in_use)
1559 		rx_ctrl &= ~NVREG_RCVCTL_START;
1560 	else
1561 		rx_ctrl |= NVREG_RCVCTL_RX_PATH_EN;
1562 	writel(rx_ctrl, base + NvRegReceiverControl);
1563 	if (reg_delay(dev, NvRegReceiverStatus, NVREG_RCVSTAT_BUSY, 0,
1564 		      NV_RXSTOP_DELAY1, NV_RXSTOP_DELAY1MAX))
1565 		netdev_info(dev, "%s: ReceiverStatus remained busy\n",
1566 			    __func__);
1567 
1568 	udelay(NV_RXSTOP_DELAY2);
1569 	if (!np->mac_in_use)
1570 		writel(0, base + NvRegLinkSpeed);
1571 }
1572 
nv_start_tx(struct net_device * dev)1573 static void nv_start_tx(struct net_device *dev)
1574 {
1575 	struct fe_priv *np = netdev_priv(dev);
1576 	u8 __iomem *base = get_hwbase(dev);
1577 	u32 tx_ctrl = readl(base + NvRegTransmitterControl);
1578 
1579 	tx_ctrl |= NVREG_XMITCTL_START;
1580 	if (np->mac_in_use)
1581 		tx_ctrl &= ~NVREG_XMITCTL_TX_PATH_EN;
1582 	writel(tx_ctrl, base + NvRegTransmitterControl);
1583 	pci_push(base);
1584 }
1585 
nv_stop_tx(struct net_device * dev)1586 static void nv_stop_tx(struct net_device *dev)
1587 {
1588 	struct fe_priv *np = netdev_priv(dev);
1589 	u8 __iomem *base = get_hwbase(dev);
1590 	u32 tx_ctrl = readl(base + NvRegTransmitterControl);
1591 
1592 	if (!np->mac_in_use)
1593 		tx_ctrl &= ~NVREG_XMITCTL_START;
1594 	else
1595 		tx_ctrl |= NVREG_XMITCTL_TX_PATH_EN;
1596 	writel(tx_ctrl, base + NvRegTransmitterControl);
1597 	if (reg_delay(dev, NvRegTransmitterStatus, NVREG_XMITSTAT_BUSY, 0,
1598 		      NV_TXSTOP_DELAY1, NV_TXSTOP_DELAY1MAX))
1599 		netdev_info(dev, "%s: TransmitterStatus remained busy\n",
1600 			    __func__);
1601 
1602 	udelay(NV_TXSTOP_DELAY2);
1603 	if (!np->mac_in_use)
1604 		writel(readl(base + NvRegTransmitPoll) & NVREG_TRANSMITPOLL_MAC_ADDR_REV,
1605 		       base + NvRegTransmitPoll);
1606 }
1607 
nv_start_rxtx(struct net_device * dev)1608 static void nv_start_rxtx(struct net_device *dev)
1609 {
1610 	nv_start_rx(dev);
1611 	nv_start_tx(dev);
1612 }
1613 
nv_stop_rxtx(struct net_device * dev)1614 static void nv_stop_rxtx(struct net_device *dev)
1615 {
1616 	nv_stop_rx(dev);
1617 	nv_stop_tx(dev);
1618 }
1619 
nv_txrx_reset(struct net_device * dev)1620 static void nv_txrx_reset(struct net_device *dev)
1621 {
1622 	struct fe_priv *np = netdev_priv(dev);
1623 	u8 __iomem *base = get_hwbase(dev);
1624 
1625 	writel(NVREG_TXRXCTL_BIT2 | NVREG_TXRXCTL_RESET | np->txrxctl_bits, base + NvRegTxRxControl);
1626 	pci_push(base);
1627 	udelay(NV_TXRX_RESET_DELAY);
1628 	writel(NVREG_TXRXCTL_BIT2 | np->txrxctl_bits, base + NvRegTxRxControl);
1629 	pci_push(base);
1630 }
1631 
nv_mac_reset(struct net_device * dev)1632 static void nv_mac_reset(struct net_device *dev)
1633 {
1634 	struct fe_priv *np = netdev_priv(dev);
1635 	u8 __iomem *base = get_hwbase(dev);
1636 	u32 temp1, temp2, temp3;
1637 
1638 	writel(NVREG_TXRXCTL_BIT2 | NVREG_TXRXCTL_RESET | np->txrxctl_bits, base + NvRegTxRxControl);
1639 	pci_push(base);
1640 
1641 	/* save registers since they will be cleared on reset */
1642 	temp1 = readl(base + NvRegMacAddrA);
1643 	temp2 = readl(base + NvRegMacAddrB);
1644 	temp3 = readl(base + NvRegTransmitPoll);
1645 
1646 	writel(NVREG_MAC_RESET_ASSERT, base + NvRegMacReset);
1647 	pci_push(base);
1648 	udelay(NV_MAC_RESET_DELAY);
1649 	writel(0, base + NvRegMacReset);
1650 	pci_push(base);
1651 	udelay(NV_MAC_RESET_DELAY);
1652 
1653 	/* restore saved registers */
1654 	writel(temp1, base + NvRegMacAddrA);
1655 	writel(temp2, base + NvRegMacAddrB);
1656 	writel(temp3, base + NvRegTransmitPoll);
1657 
1658 	writel(NVREG_TXRXCTL_BIT2 | np->txrxctl_bits, base + NvRegTxRxControl);
1659 	pci_push(base);
1660 }
1661 
1662 /* Caller must appropriately lock netdev_priv(dev)->hwstats_lock */
nv_update_stats(struct net_device * dev)1663 static void nv_update_stats(struct net_device *dev)
1664 {
1665 	struct fe_priv *np = netdev_priv(dev);
1666 	u8 __iomem *base = get_hwbase(dev);
1667 
1668 	lockdep_assert_held(&np->hwstats_lock);
1669 
1670 	/* query hardware */
1671 	np->estats.tx_bytes += readl(base + NvRegTxCnt);
1672 	np->estats.tx_zero_rexmt += readl(base + NvRegTxZeroReXmt);
1673 	np->estats.tx_one_rexmt += readl(base + NvRegTxOneReXmt);
1674 	np->estats.tx_many_rexmt += readl(base + NvRegTxManyReXmt);
1675 	np->estats.tx_late_collision += readl(base + NvRegTxLateCol);
1676 	np->estats.tx_fifo_errors += readl(base + NvRegTxUnderflow);
1677 	np->estats.tx_carrier_errors += readl(base + NvRegTxLossCarrier);
1678 	np->estats.tx_excess_deferral += readl(base + NvRegTxExcessDef);
1679 	np->estats.tx_retry_error += readl(base + NvRegTxRetryErr);
1680 	np->estats.rx_frame_error += readl(base + NvRegRxFrameErr);
1681 	np->estats.rx_extra_byte += readl(base + NvRegRxExtraByte);
1682 	np->estats.rx_late_collision += readl(base + NvRegRxLateCol);
1683 	np->estats.rx_runt += readl(base + NvRegRxRunt);
1684 	np->estats.rx_frame_too_long += readl(base + NvRegRxFrameTooLong);
1685 	np->estats.rx_over_errors += readl(base + NvRegRxOverflow);
1686 	np->estats.rx_crc_errors += readl(base + NvRegRxFCSErr);
1687 	np->estats.rx_frame_align_error += readl(base + NvRegRxFrameAlignErr);
1688 	np->estats.rx_length_error += readl(base + NvRegRxLenErr);
1689 	np->estats.rx_unicast += readl(base + NvRegRxUnicast);
1690 	np->estats.rx_multicast += readl(base + NvRegRxMulticast);
1691 	np->estats.rx_broadcast += readl(base + NvRegRxBroadcast);
1692 	np->estats.rx_packets =
1693 		np->estats.rx_unicast +
1694 		np->estats.rx_multicast +
1695 		np->estats.rx_broadcast;
1696 	np->estats.rx_errors_total =
1697 		np->estats.rx_crc_errors +
1698 		np->estats.rx_over_errors +
1699 		np->estats.rx_frame_error +
1700 		(np->estats.rx_frame_align_error - np->estats.rx_extra_byte) +
1701 		np->estats.rx_late_collision +
1702 		np->estats.rx_runt +
1703 		np->estats.rx_frame_too_long;
1704 	np->estats.tx_errors_total =
1705 		np->estats.tx_late_collision +
1706 		np->estats.tx_fifo_errors +
1707 		np->estats.tx_carrier_errors +
1708 		np->estats.tx_excess_deferral +
1709 		np->estats.tx_retry_error;
1710 
1711 	if (np->driver_data & DEV_HAS_STATISTICS_V2) {
1712 		np->estats.tx_deferral += readl(base + NvRegTxDef);
1713 		np->estats.tx_packets += readl(base + NvRegTxFrame);
1714 		np->estats.rx_bytes += readl(base + NvRegRxCnt);
1715 		np->estats.tx_pause += readl(base + NvRegTxPause);
1716 		np->estats.rx_pause += readl(base + NvRegRxPause);
1717 		np->estats.rx_drop_frame += readl(base + NvRegRxDropFrame);
1718 		np->estats.rx_errors_total += np->estats.rx_drop_frame;
1719 	}
1720 
1721 	if (np->driver_data & DEV_HAS_STATISTICS_V3) {
1722 		np->estats.tx_unicast += readl(base + NvRegTxUnicast);
1723 		np->estats.tx_multicast += readl(base + NvRegTxMulticast);
1724 		np->estats.tx_broadcast += readl(base + NvRegTxBroadcast);
1725 	}
1726 }
1727 
nv_get_stats(int cpu,struct fe_priv * np,struct rtnl_link_stats64 * storage)1728 static void nv_get_stats(int cpu, struct fe_priv *np,
1729 			 struct rtnl_link_stats64 *storage)
1730 {
1731 	struct nv_txrx_stats *src = per_cpu_ptr(np->txrx_stats, cpu);
1732 	unsigned int syncp_start;
1733 	u64 rx_packets, rx_bytes, rx_dropped, rx_missed_errors;
1734 	u64 tx_packets, tx_bytes, tx_dropped;
1735 
1736 	do {
1737 		syncp_start = u64_stats_fetch_begin(&np->swstats_rx_syncp);
1738 		rx_packets       = src->stat_rx_packets;
1739 		rx_bytes         = src->stat_rx_bytes;
1740 		rx_dropped       = src->stat_rx_dropped;
1741 		rx_missed_errors = src->stat_rx_missed_errors;
1742 	} while (u64_stats_fetch_retry(&np->swstats_rx_syncp, syncp_start));
1743 
1744 	storage->rx_packets       += rx_packets;
1745 	storage->rx_bytes         += rx_bytes;
1746 	storage->rx_dropped       += rx_dropped;
1747 	storage->rx_missed_errors += rx_missed_errors;
1748 
1749 	do {
1750 		syncp_start = u64_stats_fetch_begin(&np->swstats_tx_syncp);
1751 		tx_packets  = src->stat_tx_packets;
1752 		tx_bytes    = src->stat_tx_bytes;
1753 		tx_dropped  = src->stat_tx_dropped;
1754 	} while (u64_stats_fetch_retry(&np->swstats_tx_syncp, syncp_start));
1755 
1756 	storage->tx_packets += tx_packets;
1757 	storage->tx_bytes   += tx_bytes;
1758 	storage->tx_dropped += tx_dropped;
1759 }
1760 
1761 /*
1762  * nv_get_stats64: dev->ndo_get_stats64 function
1763  * Get latest stats value from the nic.
1764  * Called with rcu_read_lock() held -
1765  * only synchronized against unregister_netdevice.
1766  */
1767 static void
nv_get_stats64(struct net_device * dev,struct rtnl_link_stats64 * storage)1768 nv_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *storage)
1769 	__acquires(&netdev_priv(dev)->hwstats_lock)
1770 	__releases(&netdev_priv(dev)->hwstats_lock)
1771 {
1772 	struct fe_priv *np = netdev_priv(dev);
1773 	int cpu;
1774 
1775 	/*
1776 	 * Note: because HW stats are not always available and for
1777 	 * consistency reasons, the following ifconfig stats are
1778 	 * managed by software: rx_bytes, tx_bytes, rx_packets and
1779 	 * tx_packets. The related hardware stats reported by ethtool
1780 	 * should be equivalent to these ifconfig stats, with 4
1781 	 * additional bytes per packet (Ethernet FCS CRC), except for
1782 	 * tx_packets when TSO kicks in.
1783 	 */
1784 
1785 	/* software stats */
1786 	for_each_online_cpu(cpu)
1787 		nv_get_stats(cpu, np, storage);
1788 
1789 	/* If the nic supports hw counters then retrieve latest values */
1790 	if (np->driver_data & DEV_HAS_STATISTICS_V123) {
1791 		spin_lock_bh(&np->hwstats_lock);
1792 
1793 		nv_update_stats(dev);
1794 
1795 		/* generic stats */
1796 		storage->rx_errors = np->estats.rx_errors_total;
1797 		storage->tx_errors = np->estats.tx_errors_total;
1798 
1799 		/* meaningful only when NIC supports stats v3 */
1800 		storage->multicast = np->estats.rx_multicast;
1801 
1802 		/* detailed rx_errors */
1803 		storage->rx_length_errors = np->estats.rx_length_error;
1804 		storage->rx_over_errors   = np->estats.rx_over_errors;
1805 		storage->rx_crc_errors    = np->estats.rx_crc_errors;
1806 		storage->rx_frame_errors  = np->estats.rx_frame_align_error;
1807 		storage->rx_fifo_errors   = np->estats.rx_drop_frame;
1808 
1809 		/* detailed tx_errors */
1810 		storage->tx_carrier_errors = np->estats.tx_carrier_errors;
1811 		storage->tx_fifo_errors    = np->estats.tx_fifo_errors;
1812 
1813 		spin_unlock_bh(&np->hwstats_lock);
1814 	}
1815 }
1816 
1817 /*
1818  * nv_alloc_rx: fill rx ring entries.
1819  * Return 1 if the allocations for the skbs failed and the
1820  * rx engine is without Available descriptors
1821  */
nv_alloc_rx(struct net_device * dev)1822 static int nv_alloc_rx(struct net_device *dev)
1823 {
1824 	struct fe_priv *np = netdev_priv(dev);
1825 	struct ring_desc *less_rx;
1826 
1827 	less_rx = np->get_rx.orig;
1828 	if (less_rx-- == np->rx_ring.orig)
1829 		less_rx = np->last_rx.orig;
1830 
1831 	while (np->put_rx.orig != less_rx) {
1832 		struct sk_buff *skb = netdev_alloc_skb(dev, np->rx_buf_sz + NV_RX_ALLOC_PAD);
1833 		if (likely(skb)) {
1834 			np->put_rx_ctx->skb = skb;
1835 			np->put_rx_ctx->dma = dma_map_single(&np->pci_dev->dev,
1836 							     skb->data,
1837 							     skb_tailroom(skb),
1838 							     DMA_FROM_DEVICE);
1839 			if (unlikely(dma_mapping_error(&np->pci_dev->dev,
1840 						       np->put_rx_ctx->dma))) {
1841 				kfree_skb(skb);
1842 				goto packet_dropped;
1843 			}
1844 			np->put_rx_ctx->dma_len = skb_tailroom(skb);
1845 			np->put_rx.orig->buf = cpu_to_le32(np->put_rx_ctx->dma);
1846 			wmb();
1847 			np->put_rx.orig->flaglen = cpu_to_le32(np->rx_buf_sz | NV_RX_AVAIL);
1848 			if (unlikely(np->put_rx.orig++ == np->last_rx.orig))
1849 				np->put_rx.orig = np->rx_ring.orig;
1850 			if (unlikely(np->put_rx_ctx++ == np->last_rx_ctx))
1851 				np->put_rx_ctx = np->rx_skb;
1852 		} else {
1853 packet_dropped:
1854 			u64_stats_update_begin(&np->swstats_rx_syncp);
1855 			nv_txrx_stats_inc(stat_rx_dropped);
1856 			u64_stats_update_end(&np->swstats_rx_syncp);
1857 			return 1;
1858 		}
1859 	}
1860 	return 0;
1861 }
1862 
nv_alloc_rx_optimized(struct net_device * dev)1863 static int nv_alloc_rx_optimized(struct net_device *dev)
1864 {
1865 	struct fe_priv *np = netdev_priv(dev);
1866 	struct ring_desc_ex *less_rx;
1867 
1868 	less_rx = np->get_rx.ex;
1869 	if (less_rx-- == np->rx_ring.ex)
1870 		less_rx = np->last_rx.ex;
1871 
1872 	while (np->put_rx.ex != less_rx) {
1873 		struct sk_buff *skb = netdev_alloc_skb(dev, np->rx_buf_sz + NV_RX_ALLOC_PAD);
1874 		if (likely(skb)) {
1875 			np->put_rx_ctx->skb = skb;
1876 			np->put_rx_ctx->dma = dma_map_single(&np->pci_dev->dev,
1877 							     skb->data,
1878 							     skb_tailroom(skb),
1879 							     DMA_FROM_DEVICE);
1880 			if (unlikely(dma_mapping_error(&np->pci_dev->dev,
1881 						       np->put_rx_ctx->dma))) {
1882 				kfree_skb(skb);
1883 				goto packet_dropped;
1884 			}
1885 			np->put_rx_ctx->dma_len = skb_tailroom(skb);
1886 			np->put_rx.ex->bufhigh = cpu_to_le32(dma_high(np->put_rx_ctx->dma));
1887 			np->put_rx.ex->buflow = cpu_to_le32(dma_low(np->put_rx_ctx->dma));
1888 			wmb();
1889 			np->put_rx.ex->flaglen = cpu_to_le32(np->rx_buf_sz | NV_RX2_AVAIL);
1890 			if (unlikely(np->put_rx.ex++ == np->last_rx.ex))
1891 				np->put_rx.ex = np->rx_ring.ex;
1892 			if (unlikely(np->put_rx_ctx++ == np->last_rx_ctx))
1893 				np->put_rx_ctx = np->rx_skb;
1894 		} else {
1895 packet_dropped:
1896 			u64_stats_update_begin(&np->swstats_rx_syncp);
1897 			nv_txrx_stats_inc(stat_rx_dropped);
1898 			u64_stats_update_end(&np->swstats_rx_syncp);
1899 			return 1;
1900 		}
1901 	}
1902 	return 0;
1903 }
1904 
1905 /* If rx bufs are exhausted called after 50ms to attempt to refresh */
nv_do_rx_refill(struct timer_list * t)1906 static void nv_do_rx_refill(struct timer_list *t)
1907 {
1908 	struct fe_priv *np = from_timer(np, t, oom_kick);
1909 
1910 	/* Just reschedule NAPI rx processing */
1911 	napi_schedule(&np->napi);
1912 }
1913 
nv_init_rx(struct net_device * dev)1914 static void nv_init_rx(struct net_device *dev)
1915 {
1916 	struct fe_priv *np = netdev_priv(dev);
1917 	int i;
1918 
1919 	np->get_rx = np->rx_ring;
1920 	np->put_rx = np->rx_ring;
1921 
1922 	if (!nv_optimized(np))
1923 		np->last_rx.orig = &np->rx_ring.orig[np->rx_ring_size-1];
1924 	else
1925 		np->last_rx.ex = &np->rx_ring.ex[np->rx_ring_size-1];
1926 	np->get_rx_ctx = np->rx_skb;
1927 	np->put_rx_ctx = np->rx_skb;
1928 	np->last_rx_ctx = &np->rx_skb[np->rx_ring_size-1];
1929 
1930 	for (i = 0; i < np->rx_ring_size; i++) {
1931 		if (!nv_optimized(np)) {
1932 			np->rx_ring.orig[i].flaglen = 0;
1933 			np->rx_ring.orig[i].buf = 0;
1934 		} else {
1935 			np->rx_ring.ex[i].flaglen = 0;
1936 			np->rx_ring.ex[i].txvlan = 0;
1937 			np->rx_ring.ex[i].bufhigh = 0;
1938 			np->rx_ring.ex[i].buflow = 0;
1939 		}
1940 		np->rx_skb[i].skb = NULL;
1941 		np->rx_skb[i].dma = 0;
1942 	}
1943 }
1944 
nv_init_tx(struct net_device * dev)1945 static void nv_init_tx(struct net_device *dev)
1946 {
1947 	struct fe_priv *np = netdev_priv(dev);
1948 	int i;
1949 
1950 	np->get_tx = np->tx_ring;
1951 	np->put_tx = np->tx_ring;
1952 
1953 	if (!nv_optimized(np))
1954 		np->last_tx.orig = &np->tx_ring.orig[np->tx_ring_size-1];
1955 	else
1956 		np->last_tx.ex = &np->tx_ring.ex[np->tx_ring_size-1];
1957 	np->get_tx_ctx = np->tx_skb;
1958 	np->put_tx_ctx = np->tx_skb;
1959 	np->last_tx_ctx = &np->tx_skb[np->tx_ring_size-1];
1960 	netdev_reset_queue(np->dev);
1961 	np->tx_pkts_in_progress = 0;
1962 	np->tx_change_owner = NULL;
1963 	np->tx_end_flip = NULL;
1964 	np->tx_stop = 0;
1965 
1966 	for (i = 0; i < np->tx_ring_size; i++) {
1967 		if (!nv_optimized(np)) {
1968 			np->tx_ring.orig[i].flaglen = 0;
1969 			np->tx_ring.orig[i].buf = 0;
1970 		} else {
1971 			np->tx_ring.ex[i].flaglen = 0;
1972 			np->tx_ring.ex[i].txvlan = 0;
1973 			np->tx_ring.ex[i].bufhigh = 0;
1974 			np->tx_ring.ex[i].buflow = 0;
1975 		}
1976 		np->tx_skb[i].skb = NULL;
1977 		np->tx_skb[i].dma = 0;
1978 		np->tx_skb[i].dma_len = 0;
1979 		np->tx_skb[i].dma_single = 0;
1980 		np->tx_skb[i].first_tx_desc = NULL;
1981 		np->tx_skb[i].next_tx_ctx = NULL;
1982 	}
1983 }
1984 
nv_init_ring(struct net_device * dev)1985 static int nv_init_ring(struct net_device *dev)
1986 {
1987 	struct fe_priv *np = netdev_priv(dev);
1988 
1989 	nv_init_tx(dev);
1990 	nv_init_rx(dev);
1991 
1992 	if (!nv_optimized(np))
1993 		return nv_alloc_rx(dev);
1994 	else
1995 		return nv_alloc_rx_optimized(dev);
1996 }
1997 
nv_unmap_txskb(struct fe_priv * np,struct nv_skb_map * tx_skb)1998 static void nv_unmap_txskb(struct fe_priv *np, struct nv_skb_map *tx_skb)
1999 {
2000 	if (tx_skb->dma) {
2001 		if (tx_skb->dma_single)
2002 			dma_unmap_single(&np->pci_dev->dev, tx_skb->dma,
2003 					 tx_skb->dma_len,
2004 					 DMA_TO_DEVICE);
2005 		else
2006 			dma_unmap_page(&np->pci_dev->dev, tx_skb->dma,
2007 				       tx_skb->dma_len,
2008 				       DMA_TO_DEVICE);
2009 		tx_skb->dma = 0;
2010 	}
2011 }
2012 
nv_release_txskb(struct fe_priv * np,struct nv_skb_map * tx_skb)2013 static int nv_release_txskb(struct fe_priv *np, struct nv_skb_map *tx_skb)
2014 {
2015 	nv_unmap_txskb(np, tx_skb);
2016 	if (tx_skb->skb) {
2017 		dev_kfree_skb_any(tx_skb->skb);
2018 		tx_skb->skb = NULL;
2019 		return 1;
2020 	}
2021 	return 0;
2022 }
2023 
nv_drain_tx(struct net_device * dev)2024 static void nv_drain_tx(struct net_device *dev)
2025 {
2026 	struct fe_priv *np = netdev_priv(dev);
2027 	unsigned int i;
2028 
2029 	for (i = 0; i < np->tx_ring_size; i++) {
2030 		if (!nv_optimized(np)) {
2031 			np->tx_ring.orig[i].flaglen = 0;
2032 			np->tx_ring.orig[i].buf = 0;
2033 		} else {
2034 			np->tx_ring.ex[i].flaglen = 0;
2035 			np->tx_ring.ex[i].txvlan = 0;
2036 			np->tx_ring.ex[i].bufhigh = 0;
2037 			np->tx_ring.ex[i].buflow = 0;
2038 		}
2039 		if (nv_release_txskb(np, &np->tx_skb[i])) {
2040 			u64_stats_update_begin(&np->swstats_tx_syncp);
2041 			nv_txrx_stats_inc(stat_tx_dropped);
2042 			u64_stats_update_end(&np->swstats_tx_syncp);
2043 		}
2044 		np->tx_skb[i].dma = 0;
2045 		np->tx_skb[i].dma_len = 0;
2046 		np->tx_skb[i].dma_single = 0;
2047 		np->tx_skb[i].first_tx_desc = NULL;
2048 		np->tx_skb[i].next_tx_ctx = NULL;
2049 	}
2050 	np->tx_pkts_in_progress = 0;
2051 	np->tx_change_owner = NULL;
2052 	np->tx_end_flip = NULL;
2053 }
2054 
nv_drain_rx(struct net_device * dev)2055 static void nv_drain_rx(struct net_device *dev)
2056 {
2057 	struct fe_priv *np = netdev_priv(dev);
2058 	int i;
2059 
2060 	for (i = 0; i < np->rx_ring_size; i++) {
2061 		if (!nv_optimized(np)) {
2062 			np->rx_ring.orig[i].flaglen = 0;
2063 			np->rx_ring.orig[i].buf = 0;
2064 		} else {
2065 			np->rx_ring.ex[i].flaglen = 0;
2066 			np->rx_ring.ex[i].txvlan = 0;
2067 			np->rx_ring.ex[i].bufhigh = 0;
2068 			np->rx_ring.ex[i].buflow = 0;
2069 		}
2070 		wmb();
2071 		if (np->rx_skb[i].skb) {
2072 			dma_unmap_single(&np->pci_dev->dev, np->rx_skb[i].dma,
2073 					 (skb_end_pointer(np->rx_skb[i].skb) -
2074 					 np->rx_skb[i].skb->data),
2075 					 DMA_FROM_DEVICE);
2076 			dev_kfree_skb(np->rx_skb[i].skb);
2077 			np->rx_skb[i].skb = NULL;
2078 		}
2079 	}
2080 }
2081 
nv_drain_rxtx(struct net_device * dev)2082 static void nv_drain_rxtx(struct net_device *dev)
2083 {
2084 	nv_drain_tx(dev);
2085 	nv_drain_rx(dev);
2086 }
2087 
nv_get_empty_tx_slots(struct fe_priv * np)2088 static inline u32 nv_get_empty_tx_slots(struct fe_priv *np)
2089 {
2090 	return (u32)(np->tx_ring_size - ((np->tx_ring_size + (np->put_tx_ctx - np->get_tx_ctx)) % np->tx_ring_size));
2091 }
2092 
nv_legacybackoff_reseed(struct net_device * dev)2093 static void nv_legacybackoff_reseed(struct net_device *dev)
2094 {
2095 	u8 __iomem *base = get_hwbase(dev);
2096 	u32 reg;
2097 	u32 low;
2098 	int tx_status = 0;
2099 
2100 	reg = readl(base + NvRegSlotTime) & ~NVREG_SLOTTIME_MASK;
2101 	get_random_bytes(&low, sizeof(low));
2102 	reg |= low & NVREG_SLOTTIME_MASK;
2103 
2104 	/* Need to stop tx before change takes effect.
2105 	 * Caller has already gained np->lock.
2106 	 */
2107 	tx_status = readl(base + NvRegTransmitterControl) & NVREG_XMITCTL_START;
2108 	if (tx_status)
2109 		nv_stop_tx(dev);
2110 	nv_stop_rx(dev);
2111 	writel(reg, base + NvRegSlotTime);
2112 	if (tx_status)
2113 		nv_start_tx(dev);
2114 	nv_start_rx(dev);
2115 }
2116 
2117 /* Gear Backoff Seeds */
2118 #define BACKOFF_SEEDSET_ROWS	8
2119 #define BACKOFF_SEEDSET_LFSRS	15
2120 
2121 /* Known Good seed sets */
2122 static const u32 main_seedset[BACKOFF_SEEDSET_ROWS][BACKOFF_SEEDSET_LFSRS] = {
2123 	{145, 155, 165, 175, 185, 196, 235, 245, 255, 265, 275, 285, 660, 690, 874},
2124 	{245, 255, 265, 575, 385, 298, 335, 345, 355, 366, 375, 385, 761, 790, 974},
2125 	{145, 155, 165, 175, 185, 196, 235, 245, 255, 265, 275, 285, 660, 690, 874},
2126 	{245, 255, 265, 575, 385, 298, 335, 345, 355, 366, 375, 386, 761, 790, 974},
2127 	{266, 265, 276, 585, 397, 208, 345, 355, 365, 376, 385, 396, 771, 700, 984},
2128 	{266, 265, 276, 586, 397, 208, 346, 355, 365, 376, 285, 396, 771, 700, 984},
2129 	{366, 365, 376, 686, 497, 308, 447, 455, 466, 476, 485, 496, 871, 800,  84},
2130 	{466, 465, 476, 786, 597, 408, 547, 555, 566, 576, 585, 597, 971, 900, 184} };
2131 
2132 static const u32 gear_seedset[BACKOFF_SEEDSET_ROWS][BACKOFF_SEEDSET_LFSRS] = {
2133 	{251, 262, 273, 324, 319, 508, 375, 364, 341, 371, 398, 193, 375,  30, 295},
2134 	{351, 375, 373, 469, 551, 639, 477, 464, 441, 472, 498, 293, 476, 130, 395},
2135 	{351, 375, 373, 469, 551, 639, 477, 464, 441, 472, 498, 293, 476, 130, 397},
2136 	{251, 262, 273, 324, 319, 508, 375, 364, 341, 371, 398, 193, 375,  30, 295},
2137 	{251, 262, 273, 324, 319, 508, 375, 364, 341, 371, 398, 193, 375,  30, 295},
2138 	{351, 375, 373, 469, 551, 639, 477, 464, 441, 472, 498, 293, 476, 130, 395},
2139 	{351, 375, 373, 469, 551, 639, 477, 464, 441, 472, 498, 293, 476, 130, 395},
2140 	{351, 375, 373, 469, 551, 639, 477, 464, 441, 472, 498, 293, 476, 130, 395} };
2141 
nv_gear_backoff_reseed(struct net_device * dev)2142 static void nv_gear_backoff_reseed(struct net_device *dev)
2143 {
2144 	u8 __iomem *base = get_hwbase(dev);
2145 	u32 miniseed1, miniseed2, miniseed2_reversed, miniseed3, miniseed3_reversed;
2146 	u32 temp, seedset, combinedSeed;
2147 	int i;
2148 
2149 	/* Setup seed for free running LFSR */
2150 	/* We are going to read the time stamp counter 3 times
2151 	   and swizzle bits around to increase randomness */
2152 	get_random_bytes(&miniseed1, sizeof(miniseed1));
2153 	miniseed1 &= 0x0fff;
2154 	if (miniseed1 == 0)
2155 		miniseed1 = 0xabc;
2156 
2157 	get_random_bytes(&miniseed2, sizeof(miniseed2));
2158 	miniseed2 &= 0x0fff;
2159 	if (miniseed2 == 0)
2160 		miniseed2 = 0xabc;
2161 	miniseed2_reversed =
2162 		((miniseed2 & 0xF00) >> 8) |
2163 		 (miniseed2 & 0x0F0) |
2164 		 ((miniseed2 & 0x00F) << 8);
2165 
2166 	get_random_bytes(&miniseed3, sizeof(miniseed3));
2167 	miniseed3 &= 0x0fff;
2168 	if (miniseed3 == 0)
2169 		miniseed3 = 0xabc;
2170 	miniseed3_reversed =
2171 		((miniseed3 & 0xF00) >> 8) |
2172 		 (miniseed3 & 0x0F0) |
2173 		 ((miniseed3 & 0x00F) << 8);
2174 
2175 	combinedSeed = ((miniseed1 ^ miniseed2_reversed) << 12) |
2176 		       (miniseed2 ^ miniseed3_reversed);
2177 
2178 	/* Seeds can not be zero */
2179 	if ((combinedSeed & NVREG_BKOFFCTRL_SEED_MASK) == 0)
2180 		combinedSeed |= 0x08;
2181 	if ((combinedSeed & (NVREG_BKOFFCTRL_SEED_MASK << NVREG_BKOFFCTRL_GEAR)) == 0)
2182 		combinedSeed |= 0x8000;
2183 
2184 	/* No need to disable tx here */
2185 	temp = NVREG_BKOFFCTRL_DEFAULT | (0 << NVREG_BKOFFCTRL_SELECT);
2186 	temp |= combinedSeed & NVREG_BKOFFCTRL_SEED_MASK;
2187 	temp |= combinedSeed >> NVREG_BKOFFCTRL_GEAR;
2188 	writel(temp, base + NvRegBackOffControl);
2189 
2190 	/* Setup seeds for all gear LFSRs. */
2191 	get_random_bytes(&seedset, sizeof(seedset));
2192 	seedset = seedset % BACKOFF_SEEDSET_ROWS;
2193 	for (i = 1; i <= BACKOFF_SEEDSET_LFSRS; i++) {
2194 		temp = NVREG_BKOFFCTRL_DEFAULT | (i << NVREG_BKOFFCTRL_SELECT);
2195 		temp |= main_seedset[seedset][i-1] & 0x3ff;
2196 		temp |= ((gear_seedset[seedset][i-1] & 0x3ff) << NVREG_BKOFFCTRL_GEAR);
2197 		writel(temp, base + NvRegBackOffControl);
2198 	}
2199 }
2200 
2201 /*
2202  * nv_start_xmit: dev->hard_start_xmit function
2203  * Called with netif_tx_lock held.
2204  */
nv_start_xmit(struct sk_buff * skb,struct net_device * dev)2205 static netdev_tx_t nv_start_xmit(struct sk_buff *skb, struct net_device *dev)
2206 {
2207 	struct fe_priv *np = netdev_priv(dev);
2208 	u32 tx_flags = 0;
2209 	u32 tx_flags_extra = (np->desc_ver == DESC_VER_1 ? NV_TX_LASTPACKET : NV_TX2_LASTPACKET);
2210 	unsigned int fragments = skb_shinfo(skb)->nr_frags;
2211 	unsigned int i;
2212 	u32 offset = 0;
2213 	u32 bcnt;
2214 	u32 size = skb_headlen(skb);
2215 	u32 entries = (size >> NV_TX2_TSO_MAX_SHIFT) + ((size & (NV_TX2_TSO_MAX_SIZE-1)) ? 1 : 0);
2216 	u32 empty_slots;
2217 	struct ring_desc *put_tx;
2218 	struct ring_desc *start_tx;
2219 	struct ring_desc *prev_tx;
2220 	struct nv_skb_map *prev_tx_ctx;
2221 	struct nv_skb_map *tmp_tx_ctx = NULL, *start_tx_ctx = NULL;
2222 	unsigned long flags;
2223 	netdev_tx_t ret = NETDEV_TX_OK;
2224 
2225 	/* add fragments to entries count */
2226 	for (i = 0; i < fragments; i++) {
2227 		u32 frag_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
2228 
2229 		entries += (frag_size >> NV_TX2_TSO_MAX_SHIFT) +
2230 			   ((frag_size & (NV_TX2_TSO_MAX_SIZE-1)) ? 1 : 0);
2231 	}
2232 
2233 	spin_lock_irqsave(&np->lock, flags);
2234 	empty_slots = nv_get_empty_tx_slots(np);
2235 	if (unlikely(empty_slots <= entries)) {
2236 		netif_stop_queue(dev);
2237 		np->tx_stop = 1;
2238 		spin_unlock_irqrestore(&np->lock, flags);
2239 
2240 		/* When normal packets and/or xmit_more packets fill up
2241 		 * tx_desc, it is necessary to trigger NIC tx reg.
2242 		 */
2243 		ret = NETDEV_TX_BUSY;
2244 		goto txkick;
2245 	}
2246 	spin_unlock_irqrestore(&np->lock, flags);
2247 
2248 	start_tx = put_tx = np->put_tx.orig;
2249 
2250 	/* setup the header buffer */
2251 	do {
2252 		bcnt = (size > NV_TX2_TSO_MAX_SIZE) ? NV_TX2_TSO_MAX_SIZE : size;
2253 		np->put_tx_ctx->dma = dma_map_single(&np->pci_dev->dev,
2254 						     skb->data + offset, bcnt,
2255 						     DMA_TO_DEVICE);
2256 		if (unlikely(dma_mapping_error(&np->pci_dev->dev,
2257 					       np->put_tx_ctx->dma))) {
2258 			/* on DMA mapping error - drop the packet */
2259 			dev_kfree_skb_any(skb);
2260 			u64_stats_update_begin(&np->swstats_tx_syncp);
2261 			nv_txrx_stats_inc(stat_tx_dropped);
2262 			u64_stats_update_end(&np->swstats_tx_syncp);
2263 
2264 			ret = NETDEV_TX_OK;
2265 
2266 			goto dma_error;
2267 		}
2268 		np->put_tx_ctx->dma_len = bcnt;
2269 		np->put_tx_ctx->dma_single = 1;
2270 		put_tx->buf = cpu_to_le32(np->put_tx_ctx->dma);
2271 		put_tx->flaglen = cpu_to_le32((bcnt-1) | tx_flags);
2272 
2273 		tx_flags = np->tx_flags;
2274 		offset += bcnt;
2275 		size -= bcnt;
2276 		if (unlikely(put_tx++ == np->last_tx.orig))
2277 			put_tx = np->tx_ring.orig;
2278 		if (unlikely(np->put_tx_ctx++ == np->last_tx_ctx))
2279 			np->put_tx_ctx = np->tx_skb;
2280 	} while (size);
2281 
2282 	/* setup the fragments */
2283 	for (i = 0; i < fragments; i++) {
2284 		const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2285 		u32 frag_size = skb_frag_size(frag);
2286 		offset = 0;
2287 
2288 		do {
2289 			if (!start_tx_ctx)
2290 				start_tx_ctx = tmp_tx_ctx = np->put_tx_ctx;
2291 
2292 			bcnt = (frag_size > NV_TX2_TSO_MAX_SIZE) ? NV_TX2_TSO_MAX_SIZE : frag_size;
2293 			np->put_tx_ctx->dma = skb_frag_dma_map(
2294 							&np->pci_dev->dev,
2295 							frag, offset,
2296 							bcnt,
2297 							DMA_TO_DEVICE);
2298 			if (unlikely(dma_mapping_error(&np->pci_dev->dev,
2299 						       np->put_tx_ctx->dma))) {
2300 
2301 				/* Unwind the mapped fragments */
2302 				do {
2303 					nv_unmap_txskb(np, start_tx_ctx);
2304 					if (unlikely(tmp_tx_ctx++ == np->last_tx_ctx))
2305 						tmp_tx_ctx = np->tx_skb;
2306 				} while (tmp_tx_ctx != np->put_tx_ctx);
2307 				dev_kfree_skb_any(skb);
2308 				np->put_tx_ctx = start_tx_ctx;
2309 				u64_stats_update_begin(&np->swstats_tx_syncp);
2310 				nv_txrx_stats_inc(stat_tx_dropped);
2311 				u64_stats_update_end(&np->swstats_tx_syncp);
2312 
2313 				ret = NETDEV_TX_OK;
2314 
2315 				goto dma_error;
2316 			}
2317 
2318 			np->put_tx_ctx->dma_len = bcnt;
2319 			np->put_tx_ctx->dma_single = 0;
2320 			put_tx->buf = cpu_to_le32(np->put_tx_ctx->dma);
2321 			put_tx->flaglen = cpu_to_le32((bcnt-1) | tx_flags);
2322 
2323 			offset += bcnt;
2324 			frag_size -= bcnt;
2325 			if (unlikely(put_tx++ == np->last_tx.orig))
2326 				put_tx = np->tx_ring.orig;
2327 			if (unlikely(np->put_tx_ctx++ == np->last_tx_ctx))
2328 				np->put_tx_ctx = np->tx_skb;
2329 		} while (frag_size);
2330 	}
2331 
2332 	if (unlikely(put_tx == np->tx_ring.orig))
2333 		prev_tx = np->last_tx.orig;
2334 	else
2335 		prev_tx = put_tx - 1;
2336 
2337 	if (unlikely(np->put_tx_ctx == np->tx_skb))
2338 		prev_tx_ctx = np->last_tx_ctx;
2339 	else
2340 		prev_tx_ctx = np->put_tx_ctx - 1;
2341 
2342 	/* set last fragment flag  */
2343 	prev_tx->flaglen |= cpu_to_le32(tx_flags_extra);
2344 
2345 	/* save skb in this slot's context area */
2346 	prev_tx_ctx->skb = skb;
2347 
2348 	if (skb_is_gso(skb))
2349 		tx_flags_extra = NV_TX2_TSO | (skb_shinfo(skb)->gso_size << NV_TX2_TSO_SHIFT);
2350 	else
2351 		tx_flags_extra = skb->ip_summed == CHECKSUM_PARTIAL ?
2352 			 NV_TX2_CHECKSUM_L3 | NV_TX2_CHECKSUM_L4 : 0;
2353 
2354 	spin_lock_irqsave(&np->lock, flags);
2355 
2356 	/* set tx flags */
2357 	start_tx->flaglen |= cpu_to_le32(tx_flags | tx_flags_extra);
2358 
2359 	netdev_sent_queue(np->dev, skb->len);
2360 
2361 	skb_tx_timestamp(skb);
2362 
2363 	np->put_tx.orig = put_tx;
2364 
2365 	spin_unlock_irqrestore(&np->lock, flags);
2366 
2367 txkick:
2368 	if (netif_queue_stopped(dev) || !netdev_xmit_more()) {
2369 		u32 txrxctl_kick;
2370 dma_error:
2371 		txrxctl_kick = NVREG_TXRXCTL_KICK | np->txrxctl_bits;
2372 		writel(txrxctl_kick, get_hwbase(dev) + NvRegTxRxControl);
2373 	}
2374 
2375 	return ret;
2376 }
2377 
nv_start_xmit_optimized(struct sk_buff * skb,struct net_device * dev)2378 static netdev_tx_t nv_start_xmit_optimized(struct sk_buff *skb,
2379 					   struct net_device *dev)
2380 {
2381 	struct fe_priv *np = netdev_priv(dev);
2382 	u32 tx_flags = 0;
2383 	u32 tx_flags_extra;
2384 	unsigned int fragments = skb_shinfo(skb)->nr_frags;
2385 	unsigned int i;
2386 	u32 offset = 0;
2387 	u32 bcnt;
2388 	u32 size = skb_headlen(skb);
2389 	u32 entries = (size >> NV_TX2_TSO_MAX_SHIFT) + ((size & (NV_TX2_TSO_MAX_SIZE-1)) ? 1 : 0);
2390 	u32 empty_slots;
2391 	struct ring_desc_ex *put_tx;
2392 	struct ring_desc_ex *start_tx;
2393 	struct ring_desc_ex *prev_tx;
2394 	struct nv_skb_map *prev_tx_ctx;
2395 	struct nv_skb_map *start_tx_ctx = NULL;
2396 	struct nv_skb_map *tmp_tx_ctx = NULL;
2397 	unsigned long flags;
2398 	netdev_tx_t ret = NETDEV_TX_OK;
2399 
2400 	/* add fragments to entries count */
2401 	for (i = 0; i < fragments; i++) {
2402 		u32 frag_size = skb_frag_size(&skb_shinfo(skb)->frags[i]);
2403 
2404 		entries += (frag_size >> NV_TX2_TSO_MAX_SHIFT) +
2405 			   ((frag_size & (NV_TX2_TSO_MAX_SIZE-1)) ? 1 : 0);
2406 	}
2407 
2408 	spin_lock_irqsave(&np->lock, flags);
2409 	empty_slots = nv_get_empty_tx_slots(np);
2410 	if (unlikely(empty_slots <= entries)) {
2411 		netif_stop_queue(dev);
2412 		np->tx_stop = 1;
2413 		spin_unlock_irqrestore(&np->lock, flags);
2414 
2415 		/* When normal packets and/or xmit_more packets fill up
2416 		 * tx_desc, it is necessary to trigger NIC tx reg.
2417 		 */
2418 		ret = NETDEV_TX_BUSY;
2419 
2420 		goto txkick;
2421 	}
2422 	spin_unlock_irqrestore(&np->lock, flags);
2423 
2424 	start_tx = put_tx = np->put_tx.ex;
2425 	start_tx_ctx = np->put_tx_ctx;
2426 
2427 	/* setup the header buffer */
2428 	do {
2429 		bcnt = (size > NV_TX2_TSO_MAX_SIZE) ? NV_TX2_TSO_MAX_SIZE : size;
2430 		np->put_tx_ctx->dma = dma_map_single(&np->pci_dev->dev,
2431 						     skb->data + offset, bcnt,
2432 						     DMA_TO_DEVICE);
2433 		if (unlikely(dma_mapping_error(&np->pci_dev->dev,
2434 					       np->put_tx_ctx->dma))) {
2435 			/* on DMA mapping error - drop the packet */
2436 			dev_kfree_skb_any(skb);
2437 			u64_stats_update_begin(&np->swstats_tx_syncp);
2438 			nv_txrx_stats_inc(stat_tx_dropped);
2439 			u64_stats_update_end(&np->swstats_tx_syncp);
2440 
2441 			ret = NETDEV_TX_OK;
2442 
2443 			goto dma_error;
2444 		}
2445 		np->put_tx_ctx->dma_len = bcnt;
2446 		np->put_tx_ctx->dma_single = 1;
2447 		put_tx->bufhigh = cpu_to_le32(dma_high(np->put_tx_ctx->dma));
2448 		put_tx->buflow = cpu_to_le32(dma_low(np->put_tx_ctx->dma));
2449 		put_tx->flaglen = cpu_to_le32((bcnt-1) | tx_flags);
2450 
2451 		tx_flags = NV_TX2_VALID;
2452 		offset += bcnt;
2453 		size -= bcnt;
2454 		if (unlikely(put_tx++ == np->last_tx.ex))
2455 			put_tx = np->tx_ring.ex;
2456 		if (unlikely(np->put_tx_ctx++ == np->last_tx_ctx))
2457 			np->put_tx_ctx = np->tx_skb;
2458 	} while (size);
2459 
2460 	/* setup the fragments */
2461 	for (i = 0; i < fragments; i++) {
2462 		skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2463 		u32 frag_size = skb_frag_size(frag);
2464 		offset = 0;
2465 
2466 		do {
2467 			bcnt = (frag_size > NV_TX2_TSO_MAX_SIZE) ? NV_TX2_TSO_MAX_SIZE : frag_size;
2468 			if (!start_tx_ctx)
2469 				start_tx_ctx = tmp_tx_ctx = np->put_tx_ctx;
2470 			np->put_tx_ctx->dma = skb_frag_dma_map(
2471 							&np->pci_dev->dev,
2472 							frag, offset,
2473 							bcnt,
2474 							DMA_TO_DEVICE);
2475 
2476 			if (unlikely(dma_mapping_error(&np->pci_dev->dev,
2477 						       np->put_tx_ctx->dma))) {
2478 
2479 				/* Unwind the mapped fragments */
2480 				do {
2481 					nv_unmap_txskb(np, start_tx_ctx);
2482 					if (unlikely(tmp_tx_ctx++ == np->last_tx_ctx))
2483 						tmp_tx_ctx = np->tx_skb;
2484 				} while (tmp_tx_ctx != np->put_tx_ctx);
2485 				dev_kfree_skb_any(skb);
2486 				np->put_tx_ctx = start_tx_ctx;
2487 				u64_stats_update_begin(&np->swstats_tx_syncp);
2488 				nv_txrx_stats_inc(stat_tx_dropped);
2489 				u64_stats_update_end(&np->swstats_tx_syncp);
2490 
2491 				ret = NETDEV_TX_OK;
2492 
2493 				goto dma_error;
2494 			}
2495 			np->put_tx_ctx->dma_len = bcnt;
2496 			np->put_tx_ctx->dma_single = 0;
2497 			put_tx->bufhigh = cpu_to_le32(dma_high(np->put_tx_ctx->dma));
2498 			put_tx->buflow = cpu_to_le32(dma_low(np->put_tx_ctx->dma));
2499 			put_tx->flaglen = cpu_to_le32((bcnt-1) | tx_flags);
2500 
2501 			offset += bcnt;
2502 			frag_size -= bcnt;
2503 			if (unlikely(put_tx++ == np->last_tx.ex))
2504 				put_tx = np->tx_ring.ex;
2505 			if (unlikely(np->put_tx_ctx++ == np->last_tx_ctx))
2506 				np->put_tx_ctx = np->tx_skb;
2507 		} while (frag_size);
2508 	}
2509 
2510 	if (unlikely(put_tx == np->tx_ring.ex))
2511 		prev_tx = np->last_tx.ex;
2512 	else
2513 		prev_tx = put_tx - 1;
2514 
2515 	if (unlikely(np->put_tx_ctx == np->tx_skb))
2516 		prev_tx_ctx = np->last_tx_ctx;
2517 	else
2518 		prev_tx_ctx = np->put_tx_ctx - 1;
2519 
2520 	/* set last fragment flag  */
2521 	prev_tx->flaglen |= cpu_to_le32(NV_TX2_LASTPACKET);
2522 
2523 	/* save skb in this slot's context area */
2524 	prev_tx_ctx->skb = skb;
2525 
2526 	if (skb_is_gso(skb))
2527 		tx_flags_extra = NV_TX2_TSO | (skb_shinfo(skb)->gso_size << NV_TX2_TSO_SHIFT);
2528 	else
2529 		tx_flags_extra = skb->ip_summed == CHECKSUM_PARTIAL ?
2530 			 NV_TX2_CHECKSUM_L3 | NV_TX2_CHECKSUM_L4 : 0;
2531 
2532 	/* vlan tag */
2533 	if (skb_vlan_tag_present(skb))
2534 		start_tx->txvlan = cpu_to_le32(NV_TX3_VLAN_TAG_PRESENT |
2535 					skb_vlan_tag_get(skb));
2536 	else
2537 		start_tx->txvlan = 0;
2538 
2539 	spin_lock_irqsave(&np->lock, flags);
2540 
2541 	if (np->tx_limit) {
2542 		/* Limit the number of outstanding tx. Setup all fragments, but
2543 		 * do not set the VALID bit on the first descriptor. Save a pointer
2544 		 * to that descriptor and also for next skb_map element.
2545 		 */
2546 
2547 		if (np->tx_pkts_in_progress == NV_TX_LIMIT_COUNT) {
2548 			if (!np->tx_change_owner)
2549 				np->tx_change_owner = start_tx_ctx;
2550 
2551 			/* remove VALID bit */
2552 			tx_flags &= ~NV_TX2_VALID;
2553 			start_tx_ctx->first_tx_desc = start_tx;
2554 			start_tx_ctx->next_tx_ctx = np->put_tx_ctx;
2555 			np->tx_end_flip = np->put_tx_ctx;
2556 		} else {
2557 			np->tx_pkts_in_progress++;
2558 		}
2559 	}
2560 
2561 	/* set tx flags */
2562 	start_tx->flaglen |= cpu_to_le32(tx_flags | tx_flags_extra);
2563 
2564 	netdev_sent_queue(np->dev, skb->len);
2565 
2566 	skb_tx_timestamp(skb);
2567 
2568 	np->put_tx.ex = put_tx;
2569 
2570 	spin_unlock_irqrestore(&np->lock, flags);
2571 
2572 txkick:
2573 	if (netif_queue_stopped(dev) || !netdev_xmit_more()) {
2574 		u32 txrxctl_kick;
2575 dma_error:
2576 		txrxctl_kick = NVREG_TXRXCTL_KICK | np->txrxctl_bits;
2577 		writel(txrxctl_kick, get_hwbase(dev) + NvRegTxRxControl);
2578 	}
2579 
2580 	return ret;
2581 }
2582 
nv_tx_flip_ownership(struct net_device * dev)2583 static inline void nv_tx_flip_ownership(struct net_device *dev)
2584 {
2585 	struct fe_priv *np = netdev_priv(dev);
2586 
2587 	np->tx_pkts_in_progress--;
2588 	if (np->tx_change_owner) {
2589 		np->tx_change_owner->first_tx_desc->flaglen |=
2590 			cpu_to_le32(NV_TX2_VALID);
2591 		np->tx_pkts_in_progress++;
2592 
2593 		np->tx_change_owner = np->tx_change_owner->next_tx_ctx;
2594 		if (np->tx_change_owner == np->tx_end_flip)
2595 			np->tx_change_owner = NULL;
2596 
2597 		writel(NVREG_TXRXCTL_KICK|np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl);
2598 	}
2599 }
2600 
2601 /*
2602  * nv_tx_done: check for completed packets, release the skbs.
2603  *
2604  * Caller must own np->lock.
2605  */
nv_tx_done(struct net_device * dev,int limit)2606 static int nv_tx_done(struct net_device *dev, int limit)
2607 {
2608 	struct fe_priv *np = netdev_priv(dev);
2609 	u32 flags;
2610 	int tx_work = 0;
2611 	struct ring_desc *orig_get_tx = np->get_tx.orig;
2612 	unsigned int bytes_compl = 0;
2613 
2614 	while ((np->get_tx.orig != np->put_tx.orig) &&
2615 	       !((flags = le32_to_cpu(np->get_tx.orig->flaglen)) & NV_TX_VALID) &&
2616 	       (tx_work < limit)) {
2617 
2618 		nv_unmap_txskb(np, np->get_tx_ctx);
2619 
2620 		if (np->desc_ver == DESC_VER_1) {
2621 			if (flags & NV_TX_LASTPACKET) {
2622 				if (unlikely(flags & NV_TX_ERROR)) {
2623 					if ((flags & NV_TX_RETRYERROR)
2624 					    && !(flags & NV_TX_RETRYCOUNT_MASK))
2625 						nv_legacybackoff_reseed(dev);
2626 				} else {
2627 					unsigned int len;
2628 
2629 					u64_stats_update_begin(&np->swstats_tx_syncp);
2630 					nv_txrx_stats_inc(stat_tx_packets);
2631 					len = np->get_tx_ctx->skb->len;
2632 					nv_txrx_stats_add(stat_tx_bytes, len);
2633 					u64_stats_update_end(&np->swstats_tx_syncp);
2634 				}
2635 				bytes_compl += np->get_tx_ctx->skb->len;
2636 				dev_kfree_skb_any(np->get_tx_ctx->skb);
2637 				np->get_tx_ctx->skb = NULL;
2638 				tx_work++;
2639 			}
2640 		} else {
2641 			if (flags & NV_TX2_LASTPACKET) {
2642 				if (unlikely(flags & NV_TX2_ERROR)) {
2643 					if ((flags & NV_TX2_RETRYERROR)
2644 					    && !(flags & NV_TX2_RETRYCOUNT_MASK))
2645 						nv_legacybackoff_reseed(dev);
2646 				} else {
2647 					unsigned int len;
2648 
2649 					u64_stats_update_begin(&np->swstats_tx_syncp);
2650 					nv_txrx_stats_inc(stat_tx_packets);
2651 					len = np->get_tx_ctx->skb->len;
2652 					nv_txrx_stats_add(stat_tx_bytes, len);
2653 					u64_stats_update_end(&np->swstats_tx_syncp);
2654 				}
2655 				bytes_compl += np->get_tx_ctx->skb->len;
2656 				dev_kfree_skb_any(np->get_tx_ctx->skb);
2657 				np->get_tx_ctx->skb = NULL;
2658 				tx_work++;
2659 			}
2660 		}
2661 		if (unlikely(np->get_tx.orig++ == np->last_tx.orig))
2662 			np->get_tx.orig = np->tx_ring.orig;
2663 		if (unlikely(np->get_tx_ctx++ == np->last_tx_ctx))
2664 			np->get_tx_ctx = np->tx_skb;
2665 	}
2666 
2667 	netdev_completed_queue(np->dev, tx_work, bytes_compl);
2668 
2669 	if (unlikely((np->tx_stop == 1) && (np->get_tx.orig != orig_get_tx))) {
2670 		np->tx_stop = 0;
2671 		netif_wake_queue(dev);
2672 	}
2673 	return tx_work;
2674 }
2675 
nv_tx_done_optimized(struct net_device * dev,int limit)2676 static int nv_tx_done_optimized(struct net_device *dev, int limit)
2677 {
2678 	struct fe_priv *np = netdev_priv(dev);
2679 	u32 flags;
2680 	int tx_work = 0;
2681 	struct ring_desc_ex *orig_get_tx = np->get_tx.ex;
2682 	unsigned long bytes_cleaned = 0;
2683 
2684 	while ((np->get_tx.ex != np->put_tx.ex) &&
2685 	       !((flags = le32_to_cpu(np->get_tx.ex->flaglen)) & NV_TX2_VALID) &&
2686 	       (tx_work < limit)) {
2687 
2688 		nv_unmap_txskb(np, np->get_tx_ctx);
2689 
2690 		if (flags & NV_TX2_LASTPACKET) {
2691 			if (unlikely(flags & NV_TX2_ERROR)) {
2692 				if ((flags & NV_TX2_RETRYERROR)
2693 				    && !(flags & NV_TX2_RETRYCOUNT_MASK)) {
2694 					if (np->driver_data & DEV_HAS_GEAR_MODE)
2695 						nv_gear_backoff_reseed(dev);
2696 					else
2697 						nv_legacybackoff_reseed(dev);
2698 				}
2699 			} else {
2700 				unsigned int len;
2701 
2702 				u64_stats_update_begin(&np->swstats_tx_syncp);
2703 				nv_txrx_stats_inc(stat_tx_packets);
2704 				len = np->get_tx_ctx->skb->len;
2705 				nv_txrx_stats_add(stat_tx_bytes, len);
2706 				u64_stats_update_end(&np->swstats_tx_syncp);
2707 			}
2708 
2709 			bytes_cleaned += np->get_tx_ctx->skb->len;
2710 			dev_kfree_skb_any(np->get_tx_ctx->skb);
2711 			np->get_tx_ctx->skb = NULL;
2712 			tx_work++;
2713 
2714 			if (np->tx_limit)
2715 				nv_tx_flip_ownership(dev);
2716 		}
2717 
2718 		if (unlikely(np->get_tx.ex++ == np->last_tx.ex))
2719 			np->get_tx.ex = np->tx_ring.ex;
2720 		if (unlikely(np->get_tx_ctx++ == np->last_tx_ctx))
2721 			np->get_tx_ctx = np->tx_skb;
2722 	}
2723 
2724 	netdev_completed_queue(np->dev, tx_work, bytes_cleaned);
2725 
2726 	if (unlikely((np->tx_stop == 1) && (np->get_tx.ex != orig_get_tx))) {
2727 		np->tx_stop = 0;
2728 		netif_wake_queue(dev);
2729 	}
2730 	return tx_work;
2731 }
2732 
2733 /*
2734  * nv_tx_timeout: dev->tx_timeout function
2735  * Called with netif_tx_lock held.
2736  */
nv_tx_timeout(struct net_device * dev,unsigned int txqueue)2737 static void nv_tx_timeout(struct net_device *dev, unsigned int txqueue)
2738 {
2739 	struct fe_priv *np = netdev_priv(dev);
2740 	u8 __iomem *base = get_hwbase(dev);
2741 	u32 status;
2742 	union ring_type put_tx;
2743 	int saved_tx_limit;
2744 
2745 	if (np->msi_flags & NV_MSI_X_ENABLED)
2746 		status = readl(base + NvRegMSIXIrqStatus) & NVREG_IRQSTAT_MASK;
2747 	else
2748 		status = readl(base + NvRegIrqStatus) & NVREG_IRQSTAT_MASK;
2749 
2750 	netdev_warn(dev, "Got tx_timeout. irq status: %08x\n", status);
2751 
2752 	if (unlikely(debug_tx_timeout)) {
2753 		int i;
2754 
2755 		netdev_info(dev, "Ring at %lx\n", (unsigned long)np->ring_addr);
2756 		netdev_info(dev, "Dumping tx registers\n");
2757 		for (i = 0; i <= np->register_size; i += 32) {
2758 			netdev_info(dev,
2759 				    "%3x: %08x %08x %08x %08x "
2760 				    "%08x %08x %08x %08x\n",
2761 				    i,
2762 				    readl(base + i + 0), readl(base + i + 4),
2763 				    readl(base + i + 8), readl(base + i + 12),
2764 				    readl(base + i + 16), readl(base + i + 20),
2765 				    readl(base + i + 24), readl(base + i + 28));
2766 		}
2767 		netdev_info(dev, "Dumping tx ring\n");
2768 		for (i = 0; i < np->tx_ring_size; i += 4) {
2769 			if (!nv_optimized(np)) {
2770 				netdev_info(dev,
2771 					    "%03x: %08x %08x // %08x %08x "
2772 					    "// %08x %08x // %08x %08x\n",
2773 					    i,
2774 					    le32_to_cpu(np->tx_ring.orig[i].buf),
2775 					    le32_to_cpu(np->tx_ring.orig[i].flaglen),
2776 					    le32_to_cpu(np->tx_ring.orig[i+1].buf),
2777 					    le32_to_cpu(np->tx_ring.orig[i+1].flaglen),
2778 					    le32_to_cpu(np->tx_ring.orig[i+2].buf),
2779 					    le32_to_cpu(np->tx_ring.orig[i+2].flaglen),
2780 					    le32_to_cpu(np->tx_ring.orig[i+3].buf),
2781 					    le32_to_cpu(np->tx_ring.orig[i+3].flaglen));
2782 			} else {
2783 				netdev_info(dev,
2784 					    "%03x: %08x %08x %08x "
2785 					    "// %08x %08x %08x "
2786 					    "// %08x %08x %08x "
2787 					    "// %08x %08x %08x\n",
2788 					    i,
2789 					    le32_to_cpu(np->tx_ring.ex[i].bufhigh),
2790 					    le32_to_cpu(np->tx_ring.ex[i].buflow),
2791 					    le32_to_cpu(np->tx_ring.ex[i].flaglen),
2792 					    le32_to_cpu(np->tx_ring.ex[i+1].bufhigh),
2793 					    le32_to_cpu(np->tx_ring.ex[i+1].buflow),
2794 					    le32_to_cpu(np->tx_ring.ex[i+1].flaglen),
2795 					    le32_to_cpu(np->tx_ring.ex[i+2].bufhigh),
2796 					    le32_to_cpu(np->tx_ring.ex[i+2].buflow),
2797 					    le32_to_cpu(np->tx_ring.ex[i+2].flaglen),
2798 					    le32_to_cpu(np->tx_ring.ex[i+3].bufhigh),
2799 					    le32_to_cpu(np->tx_ring.ex[i+3].buflow),
2800 					    le32_to_cpu(np->tx_ring.ex[i+3].flaglen));
2801 			}
2802 		}
2803 	}
2804 
2805 	spin_lock_irq(&np->lock);
2806 
2807 	/* 1) stop tx engine */
2808 	nv_stop_tx(dev);
2809 
2810 	/* 2) complete any outstanding tx and do not give HW any limited tx pkts */
2811 	saved_tx_limit = np->tx_limit;
2812 	np->tx_limit = 0; /* prevent giving HW any limited pkts */
2813 	np->tx_stop = 0;  /* prevent waking tx queue */
2814 	if (!nv_optimized(np))
2815 		nv_tx_done(dev, np->tx_ring_size);
2816 	else
2817 		nv_tx_done_optimized(dev, np->tx_ring_size);
2818 
2819 	/* save current HW position */
2820 	if (np->tx_change_owner)
2821 		put_tx.ex = np->tx_change_owner->first_tx_desc;
2822 	else
2823 		put_tx = np->put_tx;
2824 
2825 	/* 3) clear all tx state */
2826 	nv_drain_tx(dev);
2827 	nv_init_tx(dev);
2828 
2829 	/* 4) restore state to current HW position */
2830 	np->get_tx = np->put_tx = put_tx;
2831 	np->tx_limit = saved_tx_limit;
2832 
2833 	/* 5) restart tx engine */
2834 	nv_start_tx(dev);
2835 	netif_wake_queue(dev);
2836 	spin_unlock_irq(&np->lock);
2837 }
2838 
2839 /*
2840  * Called when the nic notices a mismatch between the actual data len on the
2841  * wire and the len indicated in the 802 header
2842  */
nv_getlen(struct net_device * dev,void * packet,int datalen)2843 static int nv_getlen(struct net_device *dev, void *packet, int datalen)
2844 {
2845 	int hdrlen;	/* length of the 802 header */
2846 	int protolen;	/* length as stored in the proto field */
2847 
2848 	/* 1) calculate len according to header */
2849 	if (((struct vlan_ethhdr *)packet)->h_vlan_proto == htons(ETH_P_8021Q)) {
2850 		protolen = ntohs(((struct vlan_ethhdr *)packet)->h_vlan_encapsulated_proto);
2851 		hdrlen = VLAN_HLEN;
2852 	} else {
2853 		protolen = ntohs(((struct ethhdr *)packet)->h_proto);
2854 		hdrlen = ETH_HLEN;
2855 	}
2856 	if (protolen > ETH_DATA_LEN)
2857 		return datalen; /* Value in proto field not a len, no checks possible */
2858 
2859 	protolen += hdrlen;
2860 	/* consistency checks: */
2861 	if (datalen > ETH_ZLEN) {
2862 		if (datalen >= protolen) {
2863 			/* more data on wire than in 802 header, trim of
2864 			 * additional data.
2865 			 */
2866 			return protolen;
2867 		} else {
2868 			/* less data on wire than mentioned in header.
2869 			 * Discard the packet.
2870 			 */
2871 			return -1;
2872 		}
2873 	} else {
2874 		/* short packet. Accept only if 802 values are also short */
2875 		if (protolen > ETH_ZLEN) {
2876 			return -1;
2877 		}
2878 		return datalen;
2879 	}
2880 }
2881 
rx_missing_handler(u32 flags,struct fe_priv * np)2882 static void rx_missing_handler(u32 flags, struct fe_priv *np)
2883 {
2884 	if (flags & NV_RX_MISSEDFRAME) {
2885 		u64_stats_update_begin(&np->swstats_rx_syncp);
2886 		nv_txrx_stats_inc(stat_rx_missed_errors);
2887 		u64_stats_update_end(&np->swstats_rx_syncp);
2888 	}
2889 }
2890 
nv_rx_process(struct net_device * dev,int limit)2891 static int nv_rx_process(struct net_device *dev, int limit)
2892 {
2893 	struct fe_priv *np = netdev_priv(dev);
2894 	u32 flags;
2895 	int rx_work = 0;
2896 	struct sk_buff *skb;
2897 	int len;
2898 
2899 	while ((np->get_rx.orig != np->put_rx.orig) &&
2900 	      !((flags = le32_to_cpu(np->get_rx.orig->flaglen)) & NV_RX_AVAIL) &&
2901 		(rx_work < limit)) {
2902 
2903 		/*
2904 		 * the packet is for us - immediately tear down the pci mapping.
2905 		 * TODO: check if a prefetch of the first cacheline improves
2906 		 * the performance.
2907 		 */
2908 		dma_unmap_single(&np->pci_dev->dev, np->get_rx_ctx->dma,
2909 				 np->get_rx_ctx->dma_len,
2910 				 DMA_FROM_DEVICE);
2911 		skb = np->get_rx_ctx->skb;
2912 		np->get_rx_ctx->skb = NULL;
2913 
2914 		/* look at what we actually got: */
2915 		if (np->desc_ver == DESC_VER_1) {
2916 			if (likely(flags & NV_RX_DESCRIPTORVALID)) {
2917 				len = flags & LEN_MASK_V1;
2918 				if (unlikely(flags & NV_RX_ERROR)) {
2919 					if ((flags & NV_RX_ERROR_MASK) == NV_RX_ERROR4) {
2920 						len = nv_getlen(dev, skb->data, len);
2921 						if (len < 0) {
2922 							dev_kfree_skb(skb);
2923 							goto next_pkt;
2924 						}
2925 					}
2926 					/* framing errors are soft errors */
2927 					else if ((flags & NV_RX_ERROR_MASK) == NV_RX_FRAMINGERR) {
2928 						if (flags & NV_RX_SUBTRACT1)
2929 							len--;
2930 					}
2931 					/* the rest are hard errors */
2932 					else {
2933 						rx_missing_handler(flags, np);
2934 						dev_kfree_skb(skb);
2935 						goto next_pkt;
2936 					}
2937 				}
2938 			} else {
2939 				dev_kfree_skb(skb);
2940 				goto next_pkt;
2941 			}
2942 		} else {
2943 			if (likely(flags & NV_RX2_DESCRIPTORVALID)) {
2944 				len = flags & LEN_MASK_V2;
2945 				if (unlikely(flags & NV_RX2_ERROR)) {
2946 					if ((flags & NV_RX2_ERROR_MASK) == NV_RX2_ERROR4) {
2947 						len = nv_getlen(dev, skb->data, len);
2948 						if (len < 0) {
2949 							dev_kfree_skb(skb);
2950 							goto next_pkt;
2951 						}
2952 					}
2953 					/* framing errors are soft errors */
2954 					else if ((flags & NV_RX2_ERROR_MASK) == NV_RX2_FRAMINGERR) {
2955 						if (flags & NV_RX2_SUBTRACT1)
2956 							len--;
2957 					}
2958 					/* the rest are hard errors */
2959 					else {
2960 						dev_kfree_skb(skb);
2961 						goto next_pkt;
2962 					}
2963 				}
2964 				if (((flags & NV_RX2_CHECKSUMMASK) == NV_RX2_CHECKSUM_IP_TCP) || /*ip and tcp */
2965 				    ((flags & NV_RX2_CHECKSUMMASK) == NV_RX2_CHECKSUM_IP_UDP))   /*ip and udp */
2966 					skb->ip_summed = CHECKSUM_UNNECESSARY;
2967 			} else {
2968 				dev_kfree_skb(skb);
2969 				goto next_pkt;
2970 			}
2971 		}
2972 		/* got a valid packet - forward it to the network core */
2973 		skb_put(skb, len);
2974 		skb->protocol = eth_type_trans(skb, dev);
2975 		napi_gro_receive(&np->napi, skb);
2976 		u64_stats_update_begin(&np->swstats_rx_syncp);
2977 		nv_txrx_stats_inc(stat_rx_packets);
2978 		nv_txrx_stats_add(stat_rx_bytes, len);
2979 		u64_stats_update_end(&np->swstats_rx_syncp);
2980 next_pkt:
2981 		if (unlikely(np->get_rx.orig++ == np->last_rx.orig))
2982 			np->get_rx.orig = np->rx_ring.orig;
2983 		if (unlikely(np->get_rx_ctx++ == np->last_rx_ctx))
2984 			np->get_rx_ctx = np->rx_skb;
2985 
2986 		rx_work++;
2987 	}
2988 
2989 	return rx_work;
2990 }
2991 
nv_rx_process_optimized(struct net_device * dev,int limit)2992 static int nv_rx_process_optimized(struct net_device *dev, int limit)
2993 {
2994 	struct fe_priv *np = netdev_priv(dev);
2995 	u32 flags;
2996 	u32 vlanflags = 0;
2997 	int rx_work = 0;
2998 	struct sk_buff *skb;
2999 	int len;
3000 
3001 	while ((np->get_rx.ex != np->put_rx.ex) &&
3002 	      !((flags = le32_to_cpu(np->get_rx.ex->flaglen)) & NV_RX2_AVAIL) &&
3003 	      (rx_work < limit)) {
3004 
3005 		/*
3006 		 * the packet is for us - immediately tear down the pci mapping.
3007 		 * TODO: check if a prefetch of the first cacheline improves
3008 		 * the performance.
3009 		 */
3010 		dma_unmap_single(&np->pci_dev->dev, np->get_rx_ctx->dma,
3011 				 np->get_rx_ctx->dma_len,
3012 				 DMA_FROM_DEVICE);
3013 		skb = np->get_rx_ctx->skb;
3014 		np->get_rx_ctx->skb = NULL;
3015 
3016 		/* look at what we actually got: */
3017 		if (likely(flags & NV_RX2_DESCRIPTORVALID)) {
3018 			len = flags & LEN_MASK_V2;
3019 			if (unlikely(flags & NV_RX2_ERROR)) {
3020 				if ((flags & NV_RX2_ERROR_MASK) == NV_RX2_ERROR4) {
3021 					len = nv_getlen(dev, skb->data, len);
3022 					if (len < 0) {
3023 						dev_kfree_skb(skb);
3024 						goto next_pkt;
3025 					}
3026 				}
3027 				/* framing errors are soft errors */
3028 				else if ((flags & NV_RX2_ERROR_MASK) == NV_RX2_FRAMINGERR) {
3029 					if (flags & NV_RX2_SUBTRACT1)
3030 						len--;
3031 				}
3032 				/* the rest are hard errors */
3033 				else {
3034 					dev_kfree_skb(skb);
3035 					goto next_pkt;
3036 				}
3037 			}
3038 
3039 			if (((flags & NV_RX2_CHECKSUMMASK) == NV_RX2_CHECKSUM_IP_TCP) || /*ip and tcp */
3040 			    ((flags & NV_RX2_CHECKSUMMASK) == NV_RX2_CHECKSUM_IP_UDP))   /*ip and udp */
3041 				skb->ip_summed = CHECKSUM_UNNECESSARY;
3042 
3043 			/* got a valid packet - forward it to the network core */
3044 			skb_put(skb, len);
3045 			skb->protocol = eth_type_trans(skb, dev);
3046 			prefetch(skb->data);
3047 
3048 			vlanflags = le32_to_cpu(np->get_rx.ex->buflow);
3049 
3050 			/*
3051 			 * There's need to check for NETIF_F_HW_VLAN_CTAG_RX
3052 			 * here. Even if vlan rx accel is disabled,
3053 			 * NV_RX3_VLAN_TAG_PRESENT is pseudo randomly set.
3054 			 */
3055 			if (dev->features & NETIF_F_HW_VLAN_CTAG_RX &&
3056 			    vlanflags & NV_RX3_VLAN_TAG_PRESENT) {
3057 				u16 vid = vlanflags & NV_RX3_VLAN_TAG_MASK;
3058 
3059 				__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
3060 			}
3061 			napi_gro_receive(&np->napi, skb);
3062 			u64_stats_update_begin(&np->swstats_rx_syncp);
3063 			nv_txrx_stats_inc(stat_rx_packets);
3064 			nv_txrx_stats_add(stat_rx_bytes, len);
3065 			u64_stats_update_end(&np->swstats_rx_syncp);
3066 		} else {
3067 			dev_kfree_skb(skb);
3068 		}
3069 next_pkt:
3070 		if (unlikely(np->get_rx.ex++ == np->last_rx.ex))
3071 			np->get_rx.ex = np->rx_ring.ex;
3072 		if (unlikely(np->get_rx_ctx++ == np->last_rx_ctx))
3073 			np->get_rx_ctx = np->rx_skb;
3074 
3075 		rx_work++;
3076 	}
3077 
3078 	return rx_work;
3079 }
3080 
set_bufsize(struct net_device * dev)3081 static void set_bufsize(struct net_device *dev)
3082 {
3083 	struct fe_priv *np = netdev_priv(dev);
3084 
3085 	if (dev->mtu <= ETH_DATA_LEN)
3086 		np->rx_buf_sz = ETH_DATA_LEN + NV_RX_HEADERS;
3087 	else
3088 		np->rx_buf_sz = dev->mtu + NV_RX_HEADERS;
3089 }
3090 
3091 /*
3092  * nv_change_mtu: dev->change_mtu function
3093  * Called with RTNL held for read.
3094  */
nv_change_mtu(struct net_device * dev,int new_mtu)3095 static int nv_change_mtu(struct net_device *dev, int new_mtu)
3096 {
3097 	struct fe_priv *np = netdev_priv(dev);
3098 	int old_mtu;
3099 
3100 	old_mtu = dev->mtu;
3101 	WRITE_ONCE(dev->mtu, new_mtu);
3102 
3103 	/* return early if the buffer sizes will not change */
3104 	if (old_mtu <= ETH_DATA_LEN && new_mtu <= ETH_DATA_LEN)
3105 		return 0;
3106 
3107 	/* synchronized against open : rtnl_lock() held by caller */
3108 	if (netif_running(dev)) {
3109 		u8 __iomem *base = get_hwbase(dev);
3110 		/*
3111 		 * It seems that the nic preloads valid ring entries into an
3112 		 * internal buffer. The procedure for flushing everything is
3113 		 * guessed, there is probably a simpler approach.
3114 		 * Changing the MTU is a rare event, it shouldn't matter.
3115 		 */
3116 		nv_disable_irq(dev);
3117 		nv_napi_disable(dev);
3118 		netif_tx_lock_bh(dev);
3119 		netif_addr_lock(dev);
3120 		spin_lock(&np->lock);
3121 		/* stop engines */
3122 		nv_stop_rxtx(dev);
3123 		nv_txrx_reset(dev);
3124 		/* drain rx queue */
3125 		nv_drain_rxtx(dev);
3126 		/* reinit driver view of the rx queue */
3127 		set_bufsize(dev);
3128 		if (nv_init_ring(dev)) {
3129 			if (!np->in_shutdown)
3130 				mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
3131 		}
3132 		/* reinit nic view of the rx queue */
3133 		writel(np->rx_buf_sz, base + NvRegOffloadConfig);
3134 		setup_hw_rings(dev, NV_SETUP_RX_RING | NV_SETUP_TX_RING);
3135 		writel(((np->rx_ring_size-1) << NVREG_RINGSZ_RXSHIFT) + ((np->tx_ring_size-1) << NVREG_RINGSZ_TXSHIFT),
3136 			base + NvRegRingSizes);
3137 		pci_push(base);
3138 		writel(NVREG_TXRXCTL_KICK|np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl);
3139 		pci_push(base);
3140 
3141 		/* restart rx engine */
3142 		nv_start_rxtx(dev);
3143 		spin_unlock(&np->lock);
3144 		netif_addr_unlock(dev);
3145 		netif_tx_unlock_bh(dev);
3146 		nv_napi_enable(dev);
3147 		nv_enable_irq(dev);
3148 	}
3149 	return 0;
3150 }
3151 
nv_copy_mac_to_hw(struct net_device * dev)3152 static void nv_copy_mac_to_hw(struct net_device *dev)
3153 {
3154 	u8 __iomem *base = get_hwbase(dev);
3155 	u32 mac[2];
3156 
3157 	mac[0] = (dev->dev_addr[0] << 0) + (dev->dev_addr[1] << 8) +
3158 			(dev->dev_addr[2] << 16) + (dev->dev_addr[3] << 24);
3159 	mac[1] = (dev->dev_addr[4] << 0) + (dev->dev_addr[5] << 8);
3160 
3161 	writel(mac[0], base + NvRegMacAddrA);
3162 	writel(mac[1], base + NvRegMacAddrB);
3163 }
3164 
3165 /*
3166  * nv_set_mac_address: dev->set_mac_address function
3167  * Called with rtnl_lock() held.
3168  */
nv_set_mac_address(struct net_device * dev,void * addr)3169 static int nv_set_mac_address(struct net_device *dev, void *addr)
3170 {
3171 	struct fe_priv *np = netdev_priv(dev);
3172 	struct sockaddr *macaddr = (struct sockaddr *)addr;
3173 
3174 	if (!is_valid_ether_addr(macaddr->sa_data))
3175 		return -EADDRNOTAVAIL;
3176 
3177 	/* synchronized against open : rtnl_lock() held by caller */
3178 	eth_hw_addr_set(dev, macaddr->sa_data);
3179 
3180 	if (netif_running(dev)) {
3181 		netif_tx_lock_bh(dev);
3182 		netif_addr_lock(dev);
3183 		spin_lock_irq(&np->lock);
3184 
3185 		/* stop rx engine */
3186 		nv_stop_rx(dev);
3187 
3188 		/* set mac address */
3189 		nv_copy_mac_to_hw(dev);
3190 
3191 		/* restart rx engine */
3192 		nv_start_rx(dev);
3193 		spin_unlock_irq(&np->lock);
3194 		netif_addr_unlock(dev);
3195 		netif_tx_unlock_bh(dev);
3196 	} else {
3197 		nv_copy_mac_to_hw(dev);
3198 	}
3199 	return 0;
3200 }
3201 
3202 /*
3203  * nv_set_multicast: dev->set_multicast function
3204  * Called with netif_tx_lock held.
3205  */
nv_set_multicast(struct net_device * dev)3206 static void nv_set_multicast(struct net_device *dev)
3207 {
3208 	struct fe_priv *np = netdev_priv(dev);
3209 	u8 __iomem *base = get_hwbase(dev);
3210 	u32 addr[2];
3211 	u32 mask[2];
3212 	u32 pff = readl(base + NvRegPacketFilterFlags) & NVREG_PFF_PAUSE_RX;
3213 
3214 	memset(addr, 0, sizeof(addr));
3215 	memset(mask, 0, sizeof(mask));
3216 
3217 	if (dev->flags & IFF_PROMISC) {
3218 		pff |= NVREG_PFF_PROMISC;
3219 	} else {
3220 		pff |= NVREG_PFF_MYADDR;
3221 
3222 		if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) {
3223 			u32 alwaysOff[2];
3224 			u32 alwaysOn[2];
3225 
3226 			alwaysOn[0] = alwaysOn[1] = alwaysOff[0] = alwaysOff[1] = 0xffffffff;
3227 			if (dev->flags & IFF_ALLMULTI) {
3228 				alwaysOn[0] = alwaysOn[1] = alwaysOff[0] = alwaysOff[1] = 0;
3229 			} else {
3230 				struct netdev_hw_addr *ha;
3231 
3232 				netdev_for_each_mc_addr(ha, dev) {
3233 					unsigned char *hw_addr = ha->addr;
3234 					u32 a, b;
3235 
3236 					a = le32_to_cpu(*(__le32 *) hw_addr);
3237 					b = le16_to_cpu(*(__le16 *) (&hw_addr[4]));
3238 					alwaysOn[0] &= a;
3239 					alwaysOff[0] &= ~a;
3240 					alwaysOn[1] &= b;
3241 					alwaysOff[1] &= ~b;
3242 				}
3243 			}
3244 			addr[0] = alwaysOn[0];
3245 			addr[1] = alwaysOn[1];
3246 			mask[0] = alwaysOn[0] | alwaysOff[0];
3247 			mask[1] = alwaysOn[1] | alwaysOff[1];
3248 		} else {
3249 			mask[0] = NVREG_MCASTMASKA_NONE;
3250 			mask[1] = NVREG_MCASTMASKB_NONE;
3251 		}
3252 	}
3253 	addr[0] |= NVREG_MCASTADDRA_FORCE;
3254 	pff |= NVREG_PFF_ALWAYS;
3255 	spin_lock_irq(&np->lock);
3256 	nv_stop_rx(dev);
3257 	writel(addr[0], base + NvRegMulticastAddrA);
3258 	writel(addr[1], base + NvRegMulticastAddrB);
3259 	writel(mask[0], base + NvRegMulticastMaskA);
3260 	writel(mask[1], base + NvRegMulticastMaskB);
3261 	writel(pff, base + NvRegPacketFilterFlags);
3262 	nv_start_rx(dev);
3263 	spin_unlock_irq(&np->lock);
3264 }
3265 
nv_update_pause(struct net_device * dev,u32 pause_flags)3266 static void nv_update_pause(struct net_device *dev, u32 pause_flags)
3267 {
3268 	struct fe_priv *np = netdev_priv(dev);
3269 	u8 __iomem *base = get_hwbase(dev);
3270 
3271 	np->pause_flags &= ~(NV_PAUSEFRAME_TX_ENABLE | NV_PAUSEFRAME_RX_ENABLE);
3272 
3273 	if (np->pause_flags & NV_PAUSEFRAME_RX_CAPABLE) {
3274 		u32 pff = readl(base + NvRegPacketFilterFlags) & ~NVREG_PFF_PAUSE_RX;
3275 		if (pause_flags & NV_PAUSEFRAME_RX_ENABLE) {
3276 			writel(pff|NVREG_PFF_PAUSE_RX, base + NvRegPacketFilterFlags);
3277 			np->pause_flags |= NV_PAUSEFRAME_RX_ENABLE;
3278 		} else {
3279 			writel(pff, base + NvRegPacketFilterFlags);
3280 		}
3281 	}
3282 	if (np->pause_flags & NV_PAUSEFRAME_TX_CAPABLE) {
3283 		u32 regmisc = readl(base + NvRegMisc1) & ~NVREG_MISC1_PAUSE_TX;
3284 		if (pause_flags & NV_PAUSEFRAME_TX_ENABLE) {
3285 			u32 pause_enable = NVREG_TX_PAUSEFRAME_ENABLE_V1;
3286 			if (np->driver_data & DEV_HAS_PAUSEFRAME_TX_V2)
3287 				pause_enable = NVREG_TX_PAUSEFRAME_ENABLE_V2;
3288 			if (np->driver_data & DEV_HAS_PAUSEFRAME_TX_V3) {
3289 				pause_enable = NVREG_TX_PAUSEFRAME_ENABLE_V3;
3290 				/* limit the number of tx pause frames to a default of 8 */
3291 				writel(readl(base + NvRegTxPauseFrameLimit)|NVREG_TX_PAUSEFRAMELIMIT_ENABLE, base + NvRegTxPauseFrameLimit);
3292 			}
3293 			writel(pause_enable,  base + NvRegTxPauseFrame);
3294 			writel(regmisc|NVREG_MISC1_PAUSE_TX, base + NvRegMisc1);
3295 			np->pause_flags |= NV_PAUSEFRAME_TX_ENABLE;
3296 		} else {
3297 			writel(NVREG_TX_PAUSEFRAME_DISABLE,  base + NvRegTxPauseFrame);
3298 			writel(regmisc, base + NvRegMisc1);
3299 		}
3300 	}
3301 }
3302 
nv_force_linkspeed(struct net_device * dev,int speed,int duplex)3303 static void nv_force_linkspeed(struct net_device *dev, int speed, int duplex)
3304 {
3305 	struct fe_priv *np = netdev_priv(dev);
3306 	u8 __iomem *base = get_hwbase(dev);
3307 	u32 phyreg, txreg;
3308 	int mii_status;
3309 
3310 	np->linkspeed = NVREG_LINKSPEED_FORCE|speed;
3311 	np->duplex = duplex;
3312 
3313 	/* see if gigabit phy */
3314 	mii_status = mii_rw(dev, np->phyaddr, MII_BMSR, MII_READ);
3315 	if (mii_status & PHY_GIGABIT) {
3316 		np->gigabit = PHY_GIGABIT;
3317 		phyreg = readl(base + NvRegSlotTime);
3318 		phyreg &= ~(0x3FF00);
3319 		if ((np->linkspeed & 0xFFF) == NVREG_LINKSPEED_10)
3320 			phyreg |= NVREG_SLOTTIME_10_100_FULL;
3321 		else if ((np->linkspeed & 0xFFF) == NVREG_LINKSPEED_100)
3322 			phyreg |= NVREG_SLOTTIME_10_100_FULL;
3323 		else if ((np->linkspeed & 0xFFF) == NVREG_LINKSPEED_1000)
3324 			phyreg |= NVREG_SLOTTIME_1000_FULL;
3325 		writel(phyreg, base + NvRegSlotTime);
3326 	}
3327 
3328 	phyreg = readl(base + NvRegPhyInterface);
3329 	phyreg &= ~(PHY_HALF|PHY_100|PHY_1000);
3330 	if (np->duplex == 0)
3331 		phyreg |= PHY_HALF;
3332 	if ((np->linkspeed & NVREG_LINKSPEED_MASK) == NVREG_LINKSPEED_100)
3333 		phyreg |= PHY_100;
3334 	else if ((np->linkspeed & NVREG_LINKSPEED_MASK) ==
3335 							NVREG_LINKSPEED_1000)
3336 		phyreg |= PHY_1000;
3337 	writel(phyreg, base + NvRegPhyInterface);
3338 
3339 	if (phyreg & PHY_RGMII) {
3340 		if ((np->linkspeed & NVREG_LINKSPEED_MASK) ==
3341 							NVREG_LINKSPEED_1000)
3342 			txreg = NVREG_TX_DEFERRAL_RGMII_1000;
3343 		else
3344 			txreg = NVREG_TX_DEFERRAL_RGMII_10_100;
3345 	} else {
3346 		txreg = NVREG_TX_DEFERRAL_DEFAULT;
3347 	}
3348 	writel(txreg, base + NvRegTxDeferral);
3349 
3350 	if (np->desc_ver == DESC_VER_1) {
3351 		txreg = NVREG_TX_WM_DESC1_DEFAULT;
3352 	} else {
3353 		if ((np->linkspeed & NVREG_LINKSPEED_MASK) ==
3354 					 NVREG_LINKSPEED_1000)
3355 			txreg = NVREG_TX_WM_DESC2_3_1000;
3356 		else
3357 			txreg = NVREG_TX_WM_DESC2_3_DEFAULT;
3358 	}
3359 	writel(txreg, base + NvRegTxWatermark);
3360 
3361 	writel(NVREG_MISC1_FORCE | (np->duplex ? 0 : NVREG_MISC1_HD),
3362 			base + NvRegMisc1);
3363 	pci_push(base);
3364 	writel(np->linkspeed, base + NvRegLinkSpeed);
3365 	pci_push(base);
3366 }
3367 
3368 /**
3369  * nv_update_linkspeed - Setup the MAC according to the link partner
3370  * @dev: Network device to be configured
3371  *
3372  * The function queries the PHY and checks if there is a link partner.
3373  * If yes, then it sets up the MAC accordingly. Otherwise, the MAC is
3374  * set to 10 MBit HD.
3375  *
3376  * The function returns 0 if there is no link partner and 1 if there is
3377  * a good link partner.
3378  */
nv_update_linkspeed(struct net_device * dev)3379 static int nv_update_linkspeed(struct net_device *dev)
3380 {
3381 	struct fe_priv *np = netdev_priv(dev);
3382 	u8 __iomem *base = get_hwbase(dev);
3383 	int adv = 0;
3384 	int lpa = 0;
3385 	int adv_lpa, adv_pause, lpa_pause;
3386 	int newls = np->linkspeed;
3387 	int newdup = np->duplex;
3388 	int mii_status;
3389 	u32 bmcr;
3390 	int retval = 0;
3391 	u32 control_1000, status_1000, phyreg, pause_flags, txreg;
3392 	u32 txrxFlags = 0;
3393 	u32 phy_exp;
3394 
3395 	/* If device loopback is enabled, set carrier on and enable max link
3396 	 * speed.
3397 	 */
3398 	bmcr = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
3399 	if (bmcr & BMCR_LOOPBACK) {
3400 		if (netif_running(dev)) {
3401 			nv_force_linkspeed(dev, NVREG_LINKSPEED_1000, 1);
3402 			if (!netif_carrier_ok(dev))
3403 				netif_carrier_on(dev);
3404 		}
3405 		return 1;
3406 	}
3407 
3408 	/* BMSR_LSTATUS is latched, read it twice:
3409 	 * we want the current value.
3410 	 */
3411 	mii_rw(dev, np->phyaddr, MII_BMSR, MII_READ);
3412 	mii_status = mii_rw(dev, np->phyaddr, MII_BMSR, MII_READ);
3413 
3414 	if (!(mii_status & BMSR_LSTATUS)) {
3415 		newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
3416 		newdup = 0;
3417 		retval = 0;
3418 		goto set_speed;
3419 	}
3420 
3421 	if (np->autoneg == 0) {
3422 		if (np->fixed_mode & LPA_100FULL) {
3423 			newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_100;
3424 			newdup = 1;
3425 		} else if (np->fixed_mode & LPA_100HALF) {
3426 			newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_100;
3427 			newdup = 0;
3428 		} else if (np->fixed_mode & LPA_10FULL) {
3429 			newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
3430 			newdup = 1;
3431 		} else {
3432 			newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
3433 			newdup = 0;
3434 		}
3435 		retval = 1;
3436 		goto set_speed;
3437 	}
3438 	/* check auto negotiation is complete */
3439 	if (!(mii_status & BMSR_ANEGCOMPLETE)) {
3440 		/* still in autonegotiation - configure nic for 10 MBit HD and wait. */
3441 		newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
3442 		newdup = 0;
3443 		retval = 0;
3444 		goto set_speed;
3445 	}
3446 
3447 	adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ);
3448 	lpa = mii_rw(dev, np->phyaddr, MII_LPA, MII_READ);
3449 
3450 	retval = 1;
3451 	if (np->gigabit == PHY_GIGABIT) {
3452 		control_1000 = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ);
3453 		status_1000 = mii_rw(dev, np->phyaddr, MII_STAT1000, MII_READ);
3454 
3455 		if ((control_1000 & ADVERTISE_1000FULL) &&
3456 			(status_1000 & LPA_1000FULL)) {
3457 			newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_1000;
3458 			newdup = 1;
3459 			goto set_speed;
3460 		}
3461 	}
3462 
3463 	/* FIXME: handle parallel detection properly */
3464 	adv_lpa = lpa & adv;
3465 	if (adv_lpa & LPA_100FULL) {
3466 		newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_100;
3467 		newdup = 1;
3468 	} else if (adv_lpa & LPA_100HALF) {
3469 		newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_100;
3470 		newdup = 0;
3471 	} else if (adv_lpa & LPA_10FULL) {
3472 		newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
3473 		newdup = 1;
3474 	} else if (adv_lpa & LPA_10HALF) {
3475 		newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
3476 		newdup = 0;
3477 	} else {
3478 		newls = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
3479 		newdup = 0;
3480 	}
3481 
3482 set_speed:
3483 	if (np->duplex == newdup && np->linkspeed == newls)
3484 		return retval;
3485 
3486 	np->duplex = newdup;
3487 	np->linkspeed = newls;
3488 
3489 	/* The transmitter and receiver must be restarted for safe update */
3490 	if (readl(base + NvRegTransmitterControl) & NVREG_XMITCTL_START) {
3491 		txrxFlags |= NV_RESTART_TX;
3492 		nv_stop_tx(dev);
3493 	}
3494 	if (readl(base + NvRegReceiverControl) & NVREG_RCVCTL_START) {
3495 		txrxFlags |= NV_RESTART_RX;
3496 		nv_stop_rx(dev);
3497 	}
3498 
3499 	if (np->gigabit == PHY_GIGABIT) {
3500 		phyreg = readl(base + NvRegSlotTime);
3501 		phyreg &= ~(0x3FF00);
3502 		if (((np->linkspeed & 0xFFF) == NVREG_LINKSPEED_10) ||
3503 		    ((np->linkspeed & 0xFFF) == NVREG_LINKSPEED_100))
3504 			phyreg |= NVREG_SLOTTIME_10_100_FULL;
3505 		else if ((np->linkspeed & 0xFFF) == NVREG_LINKSPEED_1000)
3506 			phyreg |= NVREG_SLOTTIME_1000_FULL;
3507 		writel(phyreg, base + NvRegSlotTime);
3508 	}
3509 
3510 	phyreg = readl(base + NvRegPhyInterface);
3511 	phyreg &= ~(PHY_HALF|PHY_100|PHY_1000);
3512 	if (np->duplex == 0)
3513 		phyreg |= PHY_HALF;
3514 	if ((np->linkspeed & NVREG_LINKSPEED_MASK) == NVREG_LINKSPEED_100)
3515 		phyreg |= PHY_100;
3516 	else if ((np->linkspeed & NVREG_LINKSPEED_MASK) == NVREG_LINKSPEED_1000)
3517 		phyreg |= PHY_1000;
3518 	writel(phyreg, base + NvRegPhyInterface);
3519 
3520 	phy_exp = mii_rw(dev, np->phyaddr, MII_EXPANSION, MII_READ) & EXPANSION_NWAY; /* autoneg capable */
3521 	if (phyreg & PHY_RGMII) {
3522 		if ((np->linkspeed & NVREG_LINKSPEED_MASK) == NVREG_LINKSPEED_1000) {
3523 			txreg = NVREG_TX_DEFERRAL_RGMII_1000;
3524 		} else {
3525 			if (!phy_exp && !np->duplex && (np->driver_data & DEV_HAS_COLLISION_FIX)) {
3526 				if ((np->linkspeed & NVREG_LINKSPEED_MASK) == NVREG_LINKSPEED_10)
3527 					txreg = NVREG_TX_DEFERRAL_RGMII_STRETCH_10;
3528 				else
3529 					txreg = NVREG_TX_DEFERRAL_RGMII_STRETCH_100;
3530 			} else {
3531 				txreg = NVREG_TX_DEFERRAL_RGMII_10_100;
3532 			}
3533 		}
3534 	} else {
3535 		if (!phy_exp && !np->duplex && (np->driver_data & DEV_HAS_COLLISION_FIX))
3536 			txreg = NVREG_TX_DEFERRAL_MII_STRETCH;
3537 		else
3538 			txreg = NVREG_TX_DEFERRAL_DEFAULT;
3539 	}
3540 	writel(txreg, base + NvRegTxDeferral);
3541 
3542 	if (np->desc_ver == DESC_VER_1) {
3543 		txreg = NVREG_TX_WM_DESC1_DEFAULT;
3544 	} else {
3545 		if ((np->linkspeed & NVREG_LINKSPEED_MASK) == NVREG_LINKSPEED_1000)
3546 			txreg = NVREG_TX_WM_DESC2_3_1000;
3547 		else
3548 			txreg = NVREG_TX_WM_DESC2_3_DEFAULT;
3549 	}
3550 	writel(txreg, base + NvRegTxWatermark);
3551 
3552 	writel(NVREG_MISC1_FORCE | (np->duplex ? 0 : NVREG_MISC1_HD),
3553 		base + NvRegMisc1);
3554 	pci_push(base);
3555 	writel(np->linkspeed, base + NvRegLinkSpeed);
3556 	pci_push(base);
3557 
3558 	pause_flags = 0;
3559 	/* setup pause frame */
3560 	if (netif_running(dev) && (np->duplex != 0)) {
3561 		if (np->autoneg && np->pause_flags & NV_PAUSEFRAME_AUTONEG) {
3562 			adv_pause = adv & (ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
3563 			lpa_pause = lpa & (LPA_PAUSE_CAP | LPA_PAUSE_ASYM);
3564 
3565 			switch (adv_pause) {
3566 			case ADVERTISE_PAUSE_CAP:
3567 				if (lpa_pause & LPA_PAUSE_CAP) {
3568 					pause_flags |= NV_PAUSEFRAME_RX_ENABLE;
3569 					if (np->pause_flags & NV_PAUSEFRAME_TX_REQ)
3570 						pause_flags |= NV_PAUSEFRAME_TX_ENABLE;
3571 				}
3572 				break;
3573 			case ADVERTISE_PAUSE_ASYM:
3574 				if (lpa_pause == (LPA_PAUSE_CAP | LPA_PAUSE_ASYM))
3575 					pause_flags |= NV_PAUSEFRAME_TX_ENABLE;
3576 				break;
3577 			case ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM:
3578 				if (lpa_pause & LPA_PAUSE_CAP) {
3579 					pause_flags |=  NV_PAUSEFRAME_RX_ENABLE;
3580 					if (np->pause_flags & NV_PAUSEFRAME_TX_REQ)
3581 						pause_flags |= NV_PAUSEFRAME_TX_ENABLE;
3582 				}
3583 				if (lpa_pause == LPA_PAUSE_ASYM)
3584 					pause_flags |= NV_PAUSEFRAME_RX_ENABLE;
3585 				break;
3586 			}
3587 		} else {
3588 			pause_flags = np->pause_flags;
3589 		}
3590 	}
3591 	nv_update_pause(dev, pause_flags);
3592 
3593 	if (txrxFlags & NV_RESTART_TX)
3594 		nv_start_tx(dev);
3595 	if (txrxFlags & NV_RESTART_RX)
3596 		nv_start_rx(dev);
3597 
3598 	return retval;
3599 }
3600 
nv_linkchange(struct net_device * dev)3601 static void nv_linkchange(struct net_device *dev)
3602 {
3603 	if (nv_update_linkspeed(dev)) {
3604 		if (!netif_carrier_ok(dev)) {
3605 			netif_carrier_on(dev);
3606 			netdev_info(dev, "link up\n");
3607 			nv_txrx_gate(dev, false);
3608 			nv_start_rx(dev);
3609 		}
3610 	} else {
3611 		if (netif_carrier_ok(dev)) {
3612 			netif_carrier_off(dev);
3613 			netdev_info(dev, "link down\n");
3614 			nv_txrx_gate(dev, true);
3615 			nv_stop_rx(dev);
3616 		}
3617 	}
3618 }
3619 
nv_link_irq(struct net_device * dev)3620 static void nv_link_irq(struct net_device *dev)
3621 {
3622 	u8 __iomem *base = get_hwbase(dev);
3623 	u32 miistat;
3624 
3625 	miistat = readl(base + NvRegMIIStatus);
3626 	writel(NVREG_MIISTAT_LINKCHANGE, base + NvRegMIIStatus);
3627 
3628 	if (miistat & (NVREG_MIISTAT_LINKCHANGE))
3629 		nv_linkchange(dev);
3630 }
3631 
nv_msi_workaround(struct fe_priv * np)3632 static void nv_msi_workaround(struct fe_priv *np)
3633 {
3634 
3635 	/* Need to toggle the msi irq mask within the ethernet device,
3636 	 * otherwise, future interrupts will not be detected.
3637 	 */
3638 	if (np->msi_flags & NV_MSI_ENABLED) {
3639 		u8 __iomem *base = np->base;
3640 
3641 		writel(0, base + NvRegMSIIrqMask);
3642 		writel(NVREG_MSI_VECTOR_0_ENABLED, base + NvRegMSIIrqMask);
3643 	}
3644 }
3645 
nv_change_interrupt_mode(struct net_device * dev,int total_work)3646 static inline int nv_change_interrupt_mode(struct net_device *dev, int total_work)
3647 {
3648 	struct fe_priv *np = netdev_priv(dev);
3649 
3650 	if (optimization_mode == NV_OPTIMIZATION_MODE_DYNAMIC) {
3651 		if (total_work > NV_DYNAMIC_THRESHOLD) {
3652 			/* transition to poll based interrupts */
3653 			np->quiet_count = 0;
3654 			if (np->irqmask != NVREG_IRQMASK_CPU) {
3655 				np->irqmask = NVREG_IRQMASK_CPU;
3656 				return 1;
3657 			}
3658 		} else {
3659 			if (np->quiet_count < NV_DYNAMIC_MAX_QUIET_COUNT) {
3660 				np->quiet_count++;
3661 			} else {
3662 				/* reached a period of low activity, switch
3663 				   to per tx/rx packet interrupts */
3664 				if (np->irqmask != NVREG_IRQMASK_THROUGHPUT) {
3665 					np->irqmask = NVREG_IRQMASK_THROUGHPUT;
3666 					return 1;
3667 				}
3668 			}
3669 		}
3670 	}
3671 	return 0;
3672 }
3673 
nv_nic_irq(int foo,void * data)3674 static irqreturn_t nv_nic_irq(int foo, void *data)
3675 {
3676 	struct net_device *dev = (struct net_device *) data;
3677 	struct fe_priv *np = netdev_priv(dev);
3678 	u8 __iomem *base = get_hwbase(dev);
3679 
3680 	if (!(np->msi_flags & NV_MSI_X_ENABLED)) {
3681 		np->events = readl(base + NvRegIrqStatus);
3682 		writel(np->events, base + NvRegIrqStatus);
3683 	} else {
3684 		np->events = readl(base + NvRegMSIXIrqStatus);
3685 		writel(np->events, base + NvRegMSIXIrqStatus);
3686 	}
3687 	if (!(np->events & np->irqmask))
3688 		return IRQ_NONE;
3689 
3690 	nv_msi_workaround(np);
3691 
3692 	if (napi_schedule_prep(&np->napi)) {
3693 		/*
3694 		 * Disable further irq's (msix not enabled with napi)
3695 		 */
3696 		writel(0, base + NvRegIrqMask);
3697 		__napi_schedule(&np->napi);
3698 	}
3699 
3700 	return IRQ_HANDLED;
3701 }
3702 
3703 /* All _optimized functions are used to help increase performance
3704  * (reduce CPU and increase throughput). They use descripter version 3,
3705  * compiler directives, and reduce memory accesses.
3706  */
nv_nic_irq_optimized(int foo,void * data)3707 static irqreturn_t nv_nic_irq_optimized(int foo, void *data)
3708 {
3709 	struct net_device *dev = (struct net_device *) data;
3710 	struct fe_priv *np = netdev_priv(dev);
3711 	u8 __iomem *base = get_hwbase(dev);
3712 
3713 	if (!(np->msi_flags & NV_MSI_X_ENABLED)) {
3714 		np->events = readl(base + NvRegIrqStatus);
3715 		writel(np->events, base + NvRegIrqStatus);
3716 	} else {
3717 		np->events = readl(base + NvRegMSIXIrqStatus);
3718 		writel(np->events, base + NvRegMSIXIrqStatus);
3719 	}
3720 	if (!(np->events & np->irqmask))
3721 		return IRQ_NONE;
3722 
3723 	nv_msi_workaround(np);
3724 
3725 	if (napi_schedule_prep(&np->napi)) {
3726 		/*
3727 		 * Disable further irq's (msix not enabled with napi)
3728 		 */
3729 		writel(0, base + NvRegIrqMask);
3730 		__napi_schedule(&np->napi);
3731 	}
3732 
3733 	return IRQ_HANDLED;
3734 }
3735 
nv_nic_irq_tx(int foo,void * data)3736 static irqreturn_t nv_nic_irq_tx(int foo, void *data)
3737 {
3738 	struct net_device *dev = (struct net_device *) data;
3739 	struct fe_priv *np = netdev_priv(dev);
3740 	u8 __iomem *base = get_hwbase(dev);
3741 	u32 events;
3742 	int i;
3743 	unsigned long flags;
3744 
3745 	for (i = 0;; i++) {
3746 		events = readl(base + NvRegMSIXIrqStatus) & NVREG_IRQ_TX_ALL;
3747 		writel(events, base + NvRegMSIXIrqStatus);
3748 		netdev_dbg(dev, "tx irq events: %08x\n", events);
3749 		if (!(events & np->irqmask))
3750 			break;
3751 
3752 		spin_lock_irqsave(&np->lock, flags);
3753 		nv_tx_done_optimized(dev, TX_WORK_PER_LOOP);
3754 		spin_unlock_irqrestore(&np->lock, flags);
3755 
3756 		if (unlikely(i > max_interrupt_work)) {
3757 			spin_lock_irqsave(&np->lock, flags);
3758 			/* disable interrupts on the nic */
3759 			writel(NVREG_IRQ_TX_ALL, base + NvRegIrqMask);
3760 			pci_push(base);
3761 
3762 			if (!np->in_shutdown) {
3763 				np->nic_poll_irq |= NVREG_IRQ_TX_ALL;
3764 				mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
3765 			}
3766 			spin_unlock_irqrestore(&np->lock, flags);
3767 			netdev_dbg(dev, "%s: too many iterations (%d)\n",
3768 				   __func__, i);
3769 			break;
3770 		}
3771 
3772 	}
3773 
3774 	return IRQ_RETVAL(i);
3775 }
3776 
nv_napi_poll(struct napi_struct * napi,int budget)3777 static int nv_napi_poll(struct napi_struct *napi, int budget)
3778 {
3779 	struct fe_priv *np = container_of(napi, struct fe_priv, napi);
3780 	struct net_device *dev = np->dev;
3781 	u8 __iomem *base = get_hwbase(dev);
3782 	unsigned long flags;
3783 	int retcode;
3784 	int rx_count, tx_work = 0, rx_work = 0;
3785 
3786 	do {
3787 		if (!nv_optimized(np)) {
3788 			spin_lock_irqsave(&np->lock, flags);
3789 			tx_work += nv_tx_done(dev, np->tx_ring_size);
3790 			spin_unlock_irqrestore(&np->lock, flags);
3791 
3792 			rx_count = nv_rx_process(dev, budget - rx_work);
3793 			retcode = nv_alloc_rx(dev);
3794 		} else {
3795 			spin_lock_irqsave(&np->lock, flags);
3796 			tx_work += nv_tx_done_optimized(dev, np->tx_ring_size);
3797 			spin_unlock_irqrestore(&np->lock, flags);
3798 
3799 			rx_count = nv_rx_process_optimized(dev,
3800 			    budget - rx_work);
3801 			retcode = nv_alloc_rx_optimized(dev);
3802 		}
3803 	} while (retcode == 0 &&
3804 		 rx_count > 0 && (rx_work += rx_count) < budget);
3805 
3806 	if (retcode) {
3807 		spin_lock_irqsave(&np->lock, flags);
3808 		if (!np->in_shutdown)
3809 			mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
3810 		spin_unlock_irqrestore(&np->lock, flags);
3811 	}
3812 
3813 	nv_change_interrupt_mode(dev, tx_work + rx_work);
3814 
3815 	if (unlikely(np->events & NVREG_IRQ_LINK)) {
3816 		spin_lock_irqsave(&np->lock, flags);
3817 		nv_link_irq(dev);
3818 		spin_unlock_irqrestore(&np->lock, flags);
3819 	}
3820 	if (unlikely(np->need_linktimer && time_after(jiffies, np->link_timeout))) {
3821 		spin_lock_irqsave(&np->lock, flags);
3822 		nv_linkchange(dev);
3823 		spin_unlock_irqrestore(&np->lock, flags);
3824 		np->link_timeout = jiffies + LINK_TIMEOUT;
3825 	}
3826 	if (unlikely(np->events & NVREG_IRQ_RECOVER_ERROR)) {
3827 		spin_lock_irqsave(&np->lock, flags);
3828 		if (!np->in_shutdown) {
3829 			np->nic_poll_irq = np->irqmask;
3830 			np->recover_error = 1;
3831 			mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
3832 		}
3833 		spin_unlock_irqrestore(&np->lock, flags);
3834 		napi_complete(napi);
3835 		return rx_work;
3836 	}
3837 
3838 	if (rx_work < budget) {
3839 		/* re-enable interrupts
3840 		   (msix not enabled in napi) */
3841 		napi_complete_done(napi, rx_work);
3842 
3843 		writel(np->irqmask, base + NvRegIrqMask);
3844 	}
3845 	return rx_work;
3846 }
3847 
nv_nic_irq_rx(int foo,void * data)3848 static irqreturn_t nv_nic_irq_rx(int foo, void *data)
3849 {
3850 	struct net_device *dev = (struct net_device *) data;
3851 	struct fe_priv *np = netdev_priv(dev);
3852 	u8 __iomem *base = get_hwbase(dev);
3853 	u32 events;
3854 	int i;
3855 	unsigned long flags;
3856 
3857 	for (i = 0;; i++) {
3858 		events = readl(base + NvRegMSIXIrqStatus) & NVREG_IRQ_RX_ALL;
3859 		writel(events, base + NvRegMSIXIrqStatus);
3860 		netdev_dbg(dev, "rx irq events: %08x\n", events);
3861 		if (!(events & np->irqmask))
3862 			break;
3863 
3864 		if (nv_rx_process_optimized(dev, RX_WORK_PER_LOOP)) {
3865 			if (unlikely(nv_alloc_rx_optimized(dev))) {
3866 				spin_lock_irqsave(&np->lock, flags);
3867 				if (!np->in_shutdown)
3868 					mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
3869 				spin_unlock_irqrestore(&np->lock, flags);
3870 			}
3871 		}
3872 
3873 		if (unlikely(i > max_interrupt_work)) {
3874 			spin_lock_irqsave(&np->lock, flags);
3875 			/* disable interrupts on the nic */
3876 			writel(NVREG_IRQ_RX_ALL, base + NvRegIrqMask);
3877 			pci_push(base);
3878 
3879 			if (!np->in_shutdown) {
3880 				np->nic_poll_irq |= NVREG_IRQ_RX_ALL;
3881 				mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
3882 			}
3883 			spin_unlock_irqrestore(&np->lock, flags);
3884 			netdev_dbg(dev, "%s: too many iterations (%d)\n",
3885 				   __func__, i);
3886 			break;
3887 		}
3888 	}
3889 
3890 	return IRQ_RETVAL(i);
3891 }
3892 
nv_nic_irq_other(int foo,void * data)3893 static irqreturn_t nv_nic_irq_other(int foo, void *data)
3894 {
3895 	struct net_device *dev = (struct net_device *) data;
3896 	struct fe_priv *np = netdev_priv(dev);
3897 	u8 __iomem *base = get_hwbase(dev);
3898 	u32 events;
3899 	int i;
3900 	unsigned long flags;
3901 
3902 	for (i = 0;; i++) {
3903 		events = readl(base + NvRegMSIXIrqStatus) & NVREG_IRQ_OTHER;
3904 		writel(events, base + NvRegMSIXIrqStatus);
3905 		netdev_dbg(dev, "irq events: %08x\n", events);
3906 		if (!(events & np->irqmask))
3907 			break;
3908 
3909 		/* check tx in case we reached max loop limit in tx isr */
3910 		spin_lock_irqsave(&np->lock, flags);
3911 		nv_tx_done_optimized(dev, TX_WORK_PER_LOOP);
3912 		spin_unlock_irqrestore(&np->lock, flags);
3913 
3914 		if (events & NVREG_IRQ_LINK) {
3915 			spin_lock_irqsave(&np->lock, flags);
3916 			nv_link_irq(dev);
3917 			spin_unlock_irqrestore(&np->lock, flags);
3918 		}
3919 		if (np->need_linktimer && time_after(jiffies, np->link_timeout)) {
3920 			spin_lock_irqsave(&np->lock, flags);
3921 			nv_linkchange(dev);
3922 			spin_unlock_irqrestore(&np->lock, flags);
3923 			np->link_timeout = jiffies + LINK_TIMEOUT;
3924 		}
3925 		if (events & NVREG_IRQ_RECOVER_ERROR) {
3926 			spin_lock_irqsave(&np->lock, flags);
3927 			/* disable interrupts on the nic */
3928 			writel(NVREG_IRQ_OTHER, base + NvRegIrqMask);
3929 			pci_push(base);
3930 
3931 			if (!np->in_shutdown) {
3932 				np->nic_poll_irq |= NVREG_IRQ_OTHER;
3933 				np->recover_error = 1;
3934 				mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
3935 			}
3936 			spin_unlock_irqrestore(&np->lock, flags);
3937 			break;
3938 		}
3939 		if (unlikely(i > max_interrupt_work)) {
3940 			spin_lock_irqsave(&np->lock, flags);
3941 			/* disable interrupts on the nic */
3942 			writel(NVREG_IRQ_OTHER, base + NvRegIrqMask);
3943 			pci_push(base);
3944 
3945 			if (!np->in_shutdown) {
3946 				np->nic_poll_irq |= NVREG_IRQ_OTHER;
3947 				mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
3948 			}
3949 			spin_unlock_irqrestore(&np->lock, flags);
3950 			netdev_dbg(dev, "%s: too many iterations (%d)\n",
3951 				   __func__, i);
3952 			break;
3953 		}
3954 
3955 	}
3956 
3957 	return IRQ_RETVAL(i);
3958 }
3959 
nv_nic_irq_test(int foo,void * data)3960 static irqreturn_t nv_nic_irq_test(int foo, void *data)
3961 {
3962 	struct net_device *dev = (struct net_device *) data;
3963 	struct fe_priv *np = netdev_priv(dev);
3964 	u8 __iomem *base = get_hwbase(dev);
3965 	u32 events;
3966 
3967 	if (!(np->msi_flags & NV_MSI_X_ENABLED)) {
3968 		events = readl(base + NvRegIrqStatus) & NVREG_IRQSTAT_MASK;
3969 		writel(events & NVREG_IRQ_TIMER, base + NvRegIrqStatus);
3970 	} else {
3971 		events = readl(base + NvRegMSIXIrqStatus) & NVREG_IRQSTAT_MASK;
3972 		writel(events & NVREG_IRQ_TIMER, base + NvRegMSIXIrqStatus);
3973 	}
3974 	pci_push(base);
3975 	if (!(events & NVREG_IRQ_TIMER))
3976 		return IRQ_RETVAL(0);
3977 
3978 	nv_msi_workaround(np);
3979 
3980 	spin_lock(&np->lock);
3981 	np->intr_test = 1;
3982 	spin_unlock(&np->lock);
3983 
3984 	return IRQ_RETVAL(1);
3985 }
3986 
set_msix_vector_map(struct net_device * dev,u32 vector,u32 irqmask)3987 static void set_msix_vector_map(struct net_device *dev, u32 vector, u32 irqmask)
3988 {
3989 	u8 __iomem *base = get_hwbase(dev);
3990 	int i;
3991 	u32 msixmap = 0;
3992 
3993 	/* Each interrupt bit can be mapped to a MSIX vector (4 bits).
3994 	 * MSIXMap0 represents the first 8 interrupts and MSIXMap1 represents
3995 	 * the remaining 8 interrupts.
3996 	 */
3997 	for (i = 0; i < 8; i++) {
3998 		if ((irqmask >> i) & 0x1)
3999 			msixmap |= vector << (i << 2);
4000 	}
4001 	writel(readl(base + NvRegMSIXMap0) | msixmap, base + NvRegMSIXMap0);
4002 
4003 	msixmap = 0;
4004 	for (i = 0; i < 8; i++) {
4005 		if ((irqmask >> (i + 8)) & 0x1)
4006 			msixmap |= vector << (i << 2);
4007 	}
4008 	writel(readl(base + NvRegMSIXMap1) | msixmap, base + NvRegMSIXMap1);
4009 }
4010 
nv_request_irq(struct net_device * dev,int intr_test)4011 static int nv_request_irq(struct net_device *dev, int intr_test)
4012 {
4013 	struct fe_priv *np = get_nvpriv(dev);
4014 	u8 __iomem *base = get_hwbase(dev);
4015 	int ret;
4016 	int i;
4017 	irqreturn_t (*handler)(int foo, void *data);
4018 
4019 	if (intr_test) {
4020 		handler = nv_nic_irq_test;
4021 	} else {
4022 		if (nv_optimized(np))
4023 			handler = nv_nic_irq_optimized;
4024 		else
4025 			handler = nv_nic_irq;
4026 	}
4027 
4028 	if (np->msi_flags & NV_MSI_X_CAPABLE) {
4029 		for (i = 0; i < (np->msi_flags & NV_MSI_X_VECTORS_MASK); i++)
4030 			np->msi_x_entry[i].entry = i;
4031 		ret = pci_enable_msix_range(np->pci_dev,
4032 					    np->msi_x_entry,
4033 					    np->msi_flags & NV_MSI_X_VECTORS_MASK,
4034 					    np->msi_flags & NV_MSI_X_VECTORS_MASK);
4035 		if (ret > 0) {
4036 			np->msi_flags |= NV_MSI_X_ENABLED;
4037 			if (optimization_mode == NV_OPTIMIZATION_MODE_THROUGHPUT && !intr_test) {
4038 				/* Request irq for rx handling */
4039 				sprintf(np->name_rx, "%s-rx", dev->name);
4040 				ret = request_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector,
4041 						  nv_nic_irq_rx, IRQF_SHARED, np->name_rx, dev);
4042 				if (ret) {
4043 					netdev_info(dev,
4044 						    "request_irq failed for rx %d\n",
4045 						    ret);
4046 					pci_disable_msix(np->pci_dev);
4047 					np->msi_flags &= ~NV_MSI_X_ENABLED;
4048 					goto out_err;
4049 				}
4050 				/* Request irq for tx handling */
4051 				sprintf(np->name_tx, "%s-tx", dev->name);
4052 				ret = request_irq(np->msi_x_entry[NV_MSI_X_VECTOR_TX].vector,
4053 						  nv_nic_irq_tx, IRQF_SHARED, np->name_tx, dev);
4054 				if (ret) {
4055 					netdev_info(dev,
4056 						    "request_irq failed for tx %d\n",
4057 						    ret);
4058 					pci_disable_msix(np->pci_dev);
4059 					np->msi_flags &= ~NV_MSI_X_ENABLED;
4060 					goto out_free_rx;
4061 				}
4062 				/* Request irq for link and timer handling */
4063 				sprintf(np->name_other, "%s-other", dev->name);
4064 				ret = request_irq(np->msi_x_entry[NV_MSI_X_VECTOR_OTHER].vector,
4065 						  nv_nic_irq_other, IRQF_SHARED, np->name_other, dev);
4066 				if (ret) {
4067 					netdev_info(dev,
4068 						    "request_irq failed for link %d\n",
4069 						    ret);
4070 					pci_disable_msix(np->pci_dev);
4071 					np->msi_flags &= ~NV_MSI_X_ENABLED;
4072 					goto out_free_tx;
4073 				}
4074 				/* map interrupts to their respective vector */
4075 				writel(0, base + NvRegMSIXMap0);
4076 				writel(0, base + NvRegMSIXMap1);
4077 				set_msix_vector_map(dev, NV_MSI_X_VECTOR_RX, NVREG_IRQ_RX_ALL);
4078 				set_msix_vector_map(dev, NV_MSI_X_VECTOR_TX, NVREG_IRQ_TX_ALL);
4079 				set_msix_vector_map(dev, NV_MSI_X_VECTOR_OTHER, NVREG_IRQ_OTHER);
4080 			} else {
4081 				/* Request irq for all interrupts */
4082 				ret = request_irq(np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector,
4083 						  handler, IRQF_SHARED, dev->name, dev);
4084 				if (ret) {
4085 					netdev_info(dev,
4086 						    "request_irq failed %d\n",
4087 						    ret);
4088 					pci_disable_msix(np->pci_dev);
4089 					np->msi_flags &= ~NV_MSI_X_ENABLED;
4090 					goto out_err;
4091 				}
4092 
4093 				/* map interrupts to vector 0 */
4094 				writel(0, base + NvRegMSIXMap0);
4095 				writel(0, base + NvRegMSIXMap1);
4096 			}
4097 			netdev_info(dev, "MSI-X enabled\n");
4098 			return 0;
4099 		}
4100 	}
4101 	if (np->msi_flags & NV_MSI_CAPABLE) {
4102 		ret = pci_enable_msi(np->pci_dev);
4103 		if (ret == 0) {
4104 			np->msi_flags |= NV_MSI_ENABLED;
4105 			ret = request_irq(np->pci_dev->irq, handler, IRQF_SHARED, dev->name, dev);
4106 			if (ret) {
4107 				netdev_info(dev, "request_irq failed %d\n",
4108 					    ret);
4109 				pci_disable_msi(np->pci_dev);
4110 				np->msi_flags &= ~NV_MSI_ENABLED;
4111 				goto out_err;
4112 			}
4113 
4114 			/* map interrupts to vector 0 */
4115 			writel(0, base + NvRegMSIMap0);
4116 			writel(0, base + NvRegMSIMap1);
4117 			/* enable msi vector 0 */
4118 			writel(NVREG_MSI_VECTOR_0_ENABLED, base + NvRegMSIIrqMask);
4119 			netdev_info(dev, "MSI enabled\n");
4120 			return 0;
4121 		}
4122 	}
4123 
4124 	if (request_irq(np->pci_dev->irq, handler, IRQF_SHARED, dev->name, dev) != 0)
4125 		goto out_err;
4126 
4127 	return 0;
4128 out_free_tx:
4129 	free_irq(np->msi_x_entry[NV_MSI_X_VECTOR_TX].vector, dev);
4130 out_free_rx:
4131 	free_irq(np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector, dev);
4132 out_err:
4133 	return 1;
4134 }
4135 
nv_free_irq(struct net_device * dev)4136 static void nv_free_irq(struct net_device *dev)
4137 {
4138 	struct fe_priv *np = get_nvpriv(dev);
4139 	int i;
4140 
4141 	if (np->msi_flags & NV_MSI_X_ENABLED) {
4142 		for (i = 0; i < (np->msi_flags & NV_MSI_X_VECTORS_MASK); i++)
4143 			free_irq(np->msi_x_entry[i].vector, dev);
4144 		pci_disable_msix(np->pci_dev);
4145 		np->msi_flags &= ~NV_MSI_X_ENABLED;
4146 	} else {
4147 		free_irq(np->pci_dev->irq, dev);
4148 		if (np->msi_flags & NV_MSI_ENABLED) {
4149 			pci_disable_msi(np->pci_dev);
4150 			np->msi_flags &= ~NV_MSI_ENABLED;
4151 		}
4152 	}
4153 }
4154 
nv_do_nic_poll(struct timer_list * t)4155 static void nv_do_nic_poll(struct timer_list *t)
4156 {
4157 	struct fe_priv *np = from_timer(np, t, nic_poll);
4158 	struct net_device *dev = np->dev;
4159 	u8 __iomem *base = get_hwbase(dev);
4160 	u32 mask = 0;
4161 	unsigned long flags;
4162 	unsigned int irq = 0;
4163 
4164 	/*
4165 	 * First disable irq(s) and then
4166 	 * reenable interrupts on the nic, we have to do this before calling
4167 	 * nv_nic_irq because that may decide to do otherwise
4168 	 */
4169 
4170 	if (!using_multi_irqs(dev)) {
4171 		if (np->msi_flags & NV_MSI_X_ENABLED)
4172 			irq = np->msi_x_entry[NV_MSI_X_VECTOR_ALL].vector;
4173 		else
4174 			irq = np->pci_dev->irq;
4175 		mask = np->irqmask;
4176 	} else {
4177 		if (np->nic_poll_irq & NVREG_IRQ_RX_ALL) {
4178 			irq = np->msi_x_entry[NV_MSI_X_VECTOR_RX].vector;
4179 			mask |= NVREG_IRQ_RX_ALL;
4180 		}
4181 		if (np->nic_poll_irq & NVREG_IRQ_TX_ALL) {
4182 			irq = np->msi_x_entry[NV_MSI_X_VECTOR_TX].vector;
4183 			mask |= NVREG_IRQ_TX_ALL;
4184 		}
4185 		if (np->nic_poll_irq & NVREG_IRQ_OTHER) {
4186 			irq = np->msi_x_entry[NV_MSI_X_VECTOR_OTHER].vector;
4187 			mask |= NVREG_IRQ_OTHER;
4188 		}
4189 	}
4190 
4191 	disable_irq_nosync_lockdep_irqsave(irq, &flags);
4192 	synchronize_irq(irq);
4193 
4194 	if (np->recover_error) {
4195 		np->recover_error = 0;
4196 		netdev_info(dev, "MAC in recoverable error state\n");
4197 		if (netif_running(dev)) {
4198 			netif_tx_lock_bh(dev);
4199 			netif_addr_lock(dev);
4200 			spin_lock(&np->lock);
4201 			/* stop engines */
4202 			nv_stop_rxtx(dev);
4203 			if (np->driver_data & DEV_HAS_POWER_CNTRL)
4204 				nv_mac_reset(dev);
4205 			nv_txrx_reset(dev);
4206 			/* drain rx queue */
4207 			nv_drain_rxtx(dev);
4208 			/* reinit driver view of the rx queue */
4209 			set_bufsize(dev);
4210 			if (nv_init_ring(dev)) {
4211 				if (!np->in_shutdown)
4212 					mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
4213 			}
4214 			/* reinit nic view of the rx queue */
4215 			writel(np->rx_buf_sz, base + NvRegOffloadConfig);
4216 			setup_hw_rings(dev, NV_SETUP_RX_RING | NV_SETUP_TX_RING);
4217 			writel(((np->rx_ring_size-1) << NVREG_RINGSZ_RXSHIFT) + ((np->tx_ring_size-1) << NVREG_RINGSZ_TXSHIFT),
4218 				base + NvRegRingSizes);
4219 			pci_push(base);
4220 			writel(NVREG_TXRXCTL_KICK|np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl);
4221 			pci_push(base);
4222 			/* clear interrupts */
4223 			if (!(np->msi_flags & NV_MSI_X_ENABLED))
4224 				writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus);
4225 			else
4226 				writel(NVREG_IRQSTAT_MASK, base + NvRegMSIXIrqStatus);
4227 
4228 			/* restart rx engine */
4229 			nv_start_rxtx(dev);
4230 			spin_unlock(&np->lock);
4231 			netif_addr_unlock(dev);
4232 			netif_tx_unlock_bh(dev);
4233 		}
4234 	}
4235 
4236 	writel(mask, base + NvRegIrqMask);
4237 	pci_push(base);
4238 
4239 	if (!using_multi_irqs(dev)) {
4240 		np->nic_poll_irq = 0;
4241 		if (nv_optimized(np))
4242 			nv_nic_irq_optimized(0, dev);
4243 		else
4244 			nv_nic_irq(0, dev);
4245 	} else {
4246 		if (np->nic_poll_irq & NVREG_IRQ_RX_ALL) {
4247 			np->nic_poll_irq &= ~NVREG_IRQ_RX_ALL;
4248 			nv_nic_irq_rx(0, dev);
4249 		}
4250 		if (np->nic_poll_irq & NVREG_IRQ_TX_ALL) {
4251 			np->nic_poll_irq &= ~NVREG_IRQ_TX_ALL;
4252 			nv_nic_irq_tx(0, dev);
4253 		}
4254 		if (np->nic_poll_irq & NVREG_IRQ_OTHER) {
4255 			np->nic_poll_irq &= ~NVREG_IRQ_OTHER;
4256 			nv_nic_irq_other(0, dev);
4257 		}
4258 	}
4259 
4260 	enable_irq_lockdep_irqrestore(irq, &flags);
4261 }
4262 
4263 #ifdef CONFIG_NET_POLL_CONTROLLER
nv_poll_controller(struct net_device * dev)4264 static void nv_poll_controller(struct net_device *dev)
4265 {
4266 	struct fe_priv *np = netdev_priv(dev);
4267 
4268 	nv_do_nic_poll(&np->nic_poll);
4269 }
4270 #endif
4271 
nv_do_stats_poll(struct timer_list * t)4272 static void nv_do_stats_poll(struct timer_list *t)
4273 	__acquires(&netdev_priv(dev)->hwstats_lock)
4274 	__releases(&netdev_priv(dev)->hwstats_lock)
4275 {
4276 	struct fe_priv *np = from_timer(np, t, stats_poll);
4277 	struct net_device *dev = np->dev;
4278 
4279 	/* If lock is currently taken, the stats are being refreshed
4280 	 * and hence fresh enough */
4281 	if (spin_trylock(&np->hwstats_lock)) {
4282 		nv_update_stats(dev);
4283 		spin_unlock(&np->hwstats_lock);
4284 	}
4285 
4286 	if (!np->in_shutdown)
4287 		mod_timer(&np->stats_poll,
4288 			round_jiffies(jiffies + STATS_INTERVAL));
4289 }
4290 
nv_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)4291 static void nv_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
4292 {
4293 	struct fe_priv *np = netdev_priv(dev);
4294 	strscpy(info->driver, DRV_NAME, sizeof(info->driver));
4295 	strscpy(info->version, FORCEDETH_VERSION, sizeof(info->version));
4296 	strscpy(info->bus_info, pci_name(np->pci_dev), sizeof(info->bus_info));
4297 }
4298 
nv_get_wol(struct net_device * dev,struct ethtool_wolinfo * wolinfo)4299 static void nv_get_wol(struct net_device *dev, struct ethtool_wolinfo *wolinfo)
4300 {
4301 	struct fe_priv *np = netdev_priv(dev);
4302 	wolinfo->supported = WAKE_MAGIC;
4303 
4304 	spin_lock_irq(&np->lock);
4305 	if (np->wolenabled)
4306 		wolinfo->wolopts = WAKE_MAGIC;
4307 	spin_unlock_irq(&np->lock);
4308 }
4309 
nv_set_wol(struct net_device * dev,struct ethtool_wolinfo * wolinfo)4310 static int nv_set_wol(struct net_device *dev, struct ethtool_wolinfo *wolinfo)
4311 {
4312 	struct fe_priv *np = netdev_priv(dev);
4313 	u8 __iomem *base = get_hwbase(dev);
4314 	u32 flags = 0;
4315 
4316 	if (wolinfo->wolopts == 0) {
4317 		np->wolenabled = 0;
4318 	} else if (wolinfo->wolopts & WAKE_MAGIC) {
4319 		np->wolenabled = 1;
4320 		flags = NVREG_WAKEUPFLAGS_ENABLE;
4321 	}
4322 	if (netif_running(dev)) {
4323 		spin_lock_irq(&np->lock);
4324 		writel(flags, base + NvRegWakeUpFlags);
4325 		spin_unlock_irq(&np->lock);
4326 	}
4327 	device_set_wakeup_enable(&np->pci_dev->dev, np->wolenabled);
4328 	return 0;
4329 }
4330 
nv_get_link_ksettings(struct net_device * dev,struct ethtool_link_ksettings * cmd)4331 static int nv_get_link_ksettings(struct net_device *dev,
4332 				 struct ethtool_link_ksettings *cmd)
4333 {
4334 	struct fe_priv *np = netdev_priv(dev);
4335 	u32 speed, supported, advertising;
4336 	int adv;
4337 
4338 	spin_lock_irq(&np->lock);
4339 	cmd->base.port = PORT_MII;
4340 	if (!netif_running(dev)) {
4341 		/* We do not track link speed / duplex setting if the
4342 		 * interface is disabled. Force a link check */
4343 		if (nv_update_linkspeed(dev)) {
4344 			netif_carrier_on(dev);
4345 		} else {
4346 			netif_carrier_off(dev);
4347 		}
4348 	}
4349 
4350 	if (netif_carrier_ok(dev)) {
4351 		switch (np->linkspeed & (NVREG_LINKSPEED_MASK)) {
4352 		case NVREG_LINKSPEED_10:
4353 			speed = SPEED_10;
4354 			break;
4355 		case NVREG_LINKSPEED_100:
4356 			speed = SPEED_100;
4357 			break;
4358 		case NVREG_LINKSPEED_1000:
4359 			speed = SPEED_1000;
4360 			break;
4361 		default:
4362 			speed = -1;
4363 			break;
4364 		}
4365 		cmd->base.duplex = DUPLEX_HALF;
4366 		if (np->duplex)
4367 			cmd->base.duplex = DUPLEX_FULL;
4368 	} else {
4369 		speed = SPEED_UNKNOWN;
4370 		cmd->base.duplex = DUPLEX_UNKNOWN;
4371 	}
4372 	cmd->base.speed = speed;
4373 	cmd->base.autoneg = np->autoneg;
4374 
4375 	advertising = ADVERTISED_MII;
4376 	if (np->autoneg) {
4377 		advertising |= ADVERTISED_Autoneg;
4378 		adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ);
4379 		if (adv & ADVERTISE_10HALF)
4380 			advertising |= ADVERTISED_10baseT_Half;
4381 		if (adv & ADVERTISE_10FULL)
4382 			advertising |= ADVERTISED_10baseT_Full;
4383 		if (adv & ADVERTISE_100HALF)
4384 			advertising |= ADVERTISED_100baseT_Half;
4385 		if (adv & ADVERTISE_100FULL)
4386 			advertising |= ADVERTISED_100baseT_Full;
4387 		if (np->gigabit == PHY_GIGABIT) {
4388 			adv = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ);
4389 			if (adv & ADVERTISE_1000FULL)
4390 				advertising |= ADVERTISED_1000baseT_Full;
4391 		}
4392 	}
4393 	supported = (SUPPORTED_Autoneg |
4394 		SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
4395 		SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
4396 		SUPPORTED_MII);
4397 	if (np->gigabit == PHY_GIGABIT)
4398 		supported |= SUPPORTED_1000baseT_Full;
4399 
4400 	cmd->base.phy_address = np->phyaddr;
4401 
4402 	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
4403 						supported);
4404 	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
4405 						advertising);
4406 
4407 	/* ignore maxtxpkt, maxrxpkt for now */
4408 	spin_unlock_irq(&np->lock);
4409 	return 0;
4410 }
4411 
nv_set_link_ksettings(struct net_device * dev,const struct ethtool_link_ksettings * cmd)4412 static int nv_set_link_ksettings(struct net_device *dev,
4413 				 const struct ethtool_link_ksettings *cmd)
4414 {
4415 	struct fe_priv *np = netdev_priv(dev);
4416 	u32 speed = cmd->base.speed;
4417 	u32 advertising;
4418 
4419 	ethtool_convert_link_mode_to_legacy_u32(&advertising,
4420 						cmd->link_modes.advertising);
4421 
4422 	if (cmd->base.port != PORT_MII)
4423 		return -EINVAL;
4424 	if (cmd->base.phy_address != np->phyaddr) {
4425 		/* TODO: support switching between multiple phys. Should be
4426 		 * trivial, but not enabled due to lack of test hardware. */
4427 		return -EINVAL;
4428 	}
4429 	if (cmd->base.autoneg == AUTONEG_ENABLE) {
4430 		u32 mask;
4431 
4432 		mask = ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full |
4433 			  ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full;
4434 		if (np->gigabit == PHY_GIGABIT)
4435 			mask |= ADVERTISED_1000baseT_Full;
4436 
4437 		if ((advertising & mask) == 0)
4438 			return -EINVAL;
4439 
4440 	} else if (cmd->base.autoneg == AUTONEG_DISABLE) {
4441 		/* Note: autonegotiation disable, speed 1000 intentionally
4442 		 * forbidden - no one should need that. */
4443 
4444 		if (speed != SPEED_10 && speed != SPEED_100)
4445 			return -EINVAL;
4446 		if (cmd->base.duplex != DUPLEX_HALF &&
4447 		    cmd->base.duplex != DUPLEX_FULL)
4448 			return -EINVAL;
4449 	} else {
4450 		return -EINVAL;
4451 	}
4452 
4453 	netif_carrier_off(dev);
4454 	if (netif_running(dev)) {
4455 		unsigned long flags;
4456 
4457 		nv_disable_irq(dev);
4458 		netif_tx_lock_bh(dev);
4459 		netif_addr_lock(dev);
4460 		/* with plain spinlock lockdep complains */
4461 		spin_lock_irqsave(&np->lock, flags);
4462 		/* stop engines */
4463 		/* FIXME:
4464 		 * this can take some time, and interrupts are disabled
4465 		 * due to spin_lock_irqsave, but let's hope no daemon
4466 		 * is going to change the settings very often...
4467 		 * Worst case:
4468 		 * NV_RXSTOP_DELAY1MAX + NV_TXSTOP_DELAY1MAX
4469 		 * + some minor delays, which is up to a second approximately
4470 		 */
4471 		nv_stop_rxtx(dev);
4472 		spin_unlock_irqrestore(&np->lock, flags);
4473 		netif_addr_unlock(dev);
4474 		netif_tx_unlock_bh(dev);
4475 	}
4476 
4477 	if (cmd->base.autoneg == AUTONEG_ENABLE) {
4478 		int adv, bmcr;
4479 
4480 		np->autoneg = 1;
4481 
4482 		/* advertise only what has been requested */
4483 		adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ);
4484 		adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
4485 		if (advertising & ADVERTISED_10baseT_Half)
4486 			adv |= ADVERTISE_10HALF;
4487 		if (advertising & ADVERTISED_10baseT_Full)
4488 			adv |= ADVERTISE_10FULL;
4489 		if (advertising & ADVERTISED_100baseT_Half)
4490 			adv |= ADVERTISE_100HALF;
4491 		if (advertising & ADVERTISED_100baseT_Full)
4492 			adv |= ADVERTISE_100FULL;
4493 		if (np->pause_flags & NV_PAUSEFRAME_RX_REQ)  /* for rx we set both advertisements but disable tx pause */
4494 			adv |=  ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
4495 		if (np->pause_flags & NV_PAUSEFRAME_TX_REQ)
4496 			adv |=  ADVERTISE_PAUSE_ASYM;
4497 		mii_rw(dev, np->phyaddr, MII_ADVERTISE, adv);
4498 
4499 		if (np->gigabit == PHY_GIGABIT) {
4500 			adv = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ);
4501 			adv &= ~ADVERTISE_1000FULL;
4502 			if (advertising & ADVERTISED_1000baseT_Full)
4503 				adv |= ADVERTISE_1000FULL;
4504 			mii_rw(dev, np->phyaddr, MII_CTRL1000, adv);
4505 		}
4506 
4507 		if (netif_running(dev))
4508 			netdev_info(dev, "link down\n");
4509 		bmcr = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
4510 		if (np->phy_model == PHY_MODEL_MARVELL_E3016) {
4511 			bmcr |= BMCR_ANENABLE;
4512 			/* reset the phy in order for settings to stick,
4513 			 * and cause autoneg to start */
4514 			if (phy_reset(dev, bmcr)) {
4515 				netdev_info(dev, "phy reset failed\n");
4516 				return -EINVAL;
4517 			}
4518 		} else {
4519 			bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
4520 			mii_rw(dev, np->phyaddr, MII_BMCR, bmcr);
4521 		}
4522 	} else {
4523 		int adv, bmcr;
4524 
4525 		np->autoneg = 0;
4526 
4527 		adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ);
4528 		adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
4529 		if (speed == SPEED_10 && cmd->base.duplex == DUPLEX_HALF)
4530 			adv |= ADVERTISE_10HALF;
4531 		if (speed == SPEED_10 && cmd->base.duplex == DUPLEX_FULL)
4532 			adv |= ADVERTISE_10FULL;
4533 		if (speed == SPEED_100 && cmd->base.duplex == DUPLEX_HALF)
4534 			adv |= ADVERTISE_100HALF;
4535 		if (speed == SPEED_100 && cmd->base.duplex == DUPLEX_FULL)
4536 			adv |= ADVERTISE_100FULL;
4537 		np->pause_flags &= ~(NV_PAUSEFRAME_AUTONEG|NV_PAUSEFRAME_RX_ENABLE|NV_PAUSEFRAME_TX_ENABLE);
4538 		if (np->pause_flags & NV_PAUSEFRAME_RX_REQ) {/* for rx we set both advertisements but disable tx pause */
4539 			adv |=  ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
4540 			np->pause_flags |= NV_PAUSEFRAME_RX_ENABLE;
4541 		}
4542 		if (np->pause_flags & NV_PAUSEFRAME_TX_REQ) {
4543 			adv |=  ADVERTISE_PAUSE_ASYM;
4544 			np->pause_flags |= NV_PAUSEFRAME_TX_ENABLE;
4545 		}
4546 		mii_rw(dev, np->phyaddr, MII_ADVERTISE, adv);
4547 		np->fixed_mode = adv;
4548 
4549 		if (np->gigabit == PHY_GIGABIT) {
4550 			adv = mii_rw(dev, np->phyaddr, MII_CTRL1000, MII_READ);
4551 			adv &= ~ADVERTISE_1000FULL;
4552 			mii_rw(dev, np->phyaddr, MII_CTRL1000, adv);
4553 		}
4554 
4555 		bmcr = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
4556 		bmcr &= ~(BMCR_ANENABLE|BMCR_SPEED100|BMCR_SPEED1000|BMCR_FULLDPLX);
4557 		if (np->fixed_mode & (ADVERTISE_10FULL|ADVERTISE_100FULL))
4558 			bmcr |= BMCR_FULLDPLX;
4559 		if (np->fixed_mode & (ADVERTISE_100HALF|ADVERTISE_100FULL))
4560 			bmcr |= BMCR_SPEED100;
4561 		if (np->phy_oui == PHY_OUI_MARVELL) {
4562 			/* reset the phy in order for forced mode settings to stick */
4563 			if (phy_reset(dev, bmcr)) {
4564 				netdev_info(dev, "phy reset failed\n");
4565 				return -EINVAL;
4566 			}
4567 		} else {
4568 			mii_rw(dev, np->phyaddr, MII_BMCR, bmcr);
4569 			if (netif_running(dev)) {
4570 				/* Wait a bit and then reconfigure the nic. */
4571 				udelay(10);
4572 				nv_linkchange(dev);
4573 			}
4574 		}
4575 	}
4576 
4577 	if (netif_running(dev)) {
4578 		nv_start_rxtx(dev);
4579 		nv_enable_irq(dev);
4580 	}
4581 
4582 	return 0;
4583 }
4584 
4585 #define FORCEDETH_REGS_VER	1
4586 
nv_get_regs_len(struct net_device * dev)4587 static int nv_get_regs_len(struct net_device *dev)
4588 {
4589 	struct fe_priv *np = netdev_priv(dev);
4590 	return np->register_size;
4591 }
4592 
nv_get_regs(struct net_device * dev,struct ethtool_regs * regs,void * buf)4593 static void nv_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *buf)
4594 {
4595 	struct fe_priv *np = netdev_priv(dev);
4596 	u8 __iomem *base = get_hwbase(dev);
4597 	u32 *rbuf = buf;
4598 	int i;
4599 
4600 	regs->version = FORCEDETH_REGS_VER;
4601 	spin_lock_irq(&np->lock);
4602 	for (i = 0; i < np->register_size/sizeof(u32); i++)
4603 		rbuf[i] = readl(base + i*sizeof(u32));
4604 	spin_unlock_irq(&np->lock);
4605 }
4606 
nv_nway_reset(struct net_device * dev)4607 static int nv_nway_reset(struct net_device *dev)
4608 {
4609 	struct fe_priv *np = netdev_priv(dev);
4610 	int ret;
4611 
4612 	if (np->autoneg) {
4613 		int bmcr;
4614 
4615 		netif_carrier_off(dev);
4616 		if (netif_running(dev)) {
4617 			nv_disable_irq(dev);
4618 			netif_tx_lock_bh(dev);
4619 			netif_addr_lock(dev);
4620 			spin_lock(&np->lock);
4621 			/* stop engines */
4622 			nv_stop_rxtx(dev);
4623 			spin_unlock(&np->lock);
4624 			netif_addr_unlock(dev);
4625 			netif_tx_unlock_bh(dev);
4626 			netdev_info(dev, "link down\n");
4627 		}
4628 
4629 		bmcr = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
4630 		if (np->phy_model == PHY_MODEL_MARVELL_E3016) {
4631 			bmcr |= BMCR_ANENABLE;
4632 			/* reset the phy in order for settings to stick*/
4633 			if (phy_reset(dev, bmcr)) {
4634 				netdev_info(dev, "phy reset failed\n");
4635 				return -EINVAL;
4636 			}
4637 		} else {
4638 			bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
4639 			mii_rw(dev, np->phyaddr, MII_BMCR, bmcr);
4640 		}
4641 
4642 		if (netif_running(dev)) {
4643 			nv_start_rxtx(dev);
4644 			nv_enable_irq(dev);
4645 		}
4646 		ret = 0;
4647 	} else {
4648 		ret = -EINVAL;
4649 	}
4650 
4651 	return ret;
4652 }
4653 
nv_get_ringparam(struct net_device * dev,struct ethtool_ringparam * ring,struct kernel_ethtool_ringparam * kernel_ring,struct netlink_ext_ack * extack)4654 static void nv_get_ringparam(struct net_device *dev,
4655 			     struct ethtool_ringparam *ring,
4656 			     struct kernel_ethtool_ringparam *kernel_ring,
4657 			     struct netlink_ext_ack *extack)
4658 {
4659 	struct fe_priv *np = netdev_priv(dev);
4660 
4661 	ring->rx_max_pending = (np->desc_ver == DESC_VER_1) ? RING_MAX_DESC_VER_1 : RING_MAX_DESC_VER_2_3;
4662 	ring->tx_max_pending = (np->desc_ver == DESC_VER_1) ? RING_MAX_DESC_VER_1 : RING_MAX_DESC_VER_2_3;
4663 
4664 	ring->rx_pending = np->rx_ring_size;
4665 	ring->tx_pending = np->tx_ring_size;
4666 }
4667 
nv_set_ringparam(struct net_device * dev,struct ethtool_ringparam * ring,struct kernel_ethtool_ringparam * kernel_ring,struct netlink_ext_ack * extack)4668 static int nv_set_ringparam(struct net_device *dev,
4669 			    struct ethtool_ringparam *ring,
4670 			    struct kernel_ethtool_ringparam *kernel_ring,
4671 			    struct netlink_ext_ack *extack)
4672 {
4673 	struct fe_priv *np = netdev_priv(dev);
4674 	u8 __iomem *base = get_hwbase(dev);
4675 	u8 *rxtx_ring, *rx_skbuff, *tx_skbuff;
4676 	dma_addr_t ring_addr;
4677 
4678 	if (ring->rx_pending < RX_RING_MIN ||
4679 	    ring->tx_pending < TX_RING_MIN ||
4680 	    ring->rx_mini_pending != 0 ||
4681 	    ring->rx_jumbo_pending != 0 ||
4682 	    (np->desc_ver == DESC_VER_1 &&
4683 	     (ring->rx_pending > RING_MAX_DESC_VER_1 ||
4684 	      ring->tx_pending > RING_MAX_DESC_VER_1)) ||
4685 	    (np->desc_ver != DESC_VER_1 &&
4686 	     (ring->rx_pending > RING_MAX_DESC_VER_2_3 ||
4687 	      ring->tx_pending > RING_MAX_DESC_VER_2_3))) {
4688 		return -EINVAL;
4689 	}
4690 
4691 	/* allocate new rings */
4692 	if (!nv_optimized(np)) {
4693 		rxtx_ring = dma_alloc_coherent(&np->pci_dev->dev,
4694 					       sizeof(struct ring_desc) *
4695 					       (ring->rx_pending +
4696 					       ring->tx_pending),
4697 					       &ring_addr, GFP_ATOMIC);
4698 	} else {
4699 		rxtx_ring = dma_alloc_coherent(&np->pci_dev->dev,
4700 					       sizeof(struct ring_desc_ex) *
4701 					       (ring->rx_pending +
4702 					       ring->tx_pending),
4703 					       &ring_addr, GFP_ATOMIC);
4704 	}
4705 	rx_skbuff = kmalloc_array(ring->rx_pending, sizeof(struct nv_skb_map),
4706 				  GFP_KERNEL);
4707 	tx_skbuff = kmalloc_array(ring->tx_pending, sizeof(struct nv_skb_map),
4708 				  GFP_KERNEL);
4709 	if (!rxtx_ring || !rx_skbuff || !tx_skbuff) {
4710 		/* fall back to old rings */
4711 		if (!nv_optimized(np)) {
4712 			if (rxtx_ring)
4713 				dma_free_coherent(&np->pci_dev->dev,
4714 						  sizeof(struct ring_desc) *
4715 						  (ring->rx_pending +
4716 						  ring->tx_pending),
4717 						  rxtx_ring, ring_addr);
4718 		} else {
4719 			if (rxtx_ring)
4720 				dma_free_coherent(&np->pci_dev->dev,
4721 						  sizeof(struct ring_desc_ex) *
4722 						  (ring->rx_pending +
4723 						  ring->tx_pending),
4724 						  rxtx_ring, ring_addr);
4725 		}
4726 
4727 		kfree(rx_skbuff);
4728 		kfree(tx_skbuff);
4729 		goto exit;
4730 	}
4731 
4732 	if (netif_running(dev)) {
4733 		nv_disable_irq(dev);
4734 		nv_napi_disable(dev);
4735 		netif_tx_lock_bh(dev);
4736 		netif_addr_lock(dev);
4737 		spin_lock(&np->lock);
4738 		/* stop engines */
4739 		nv_stop_rxtx(dev);
4740 		nv_txrx_reset(dev);
4741 		/* drain queues */
4742 		nv_drain_rxtx(dev);
4743 		/* delete queues */
4744 		free_rings(dev);
4745 	}
4746 
4747 	/* set new values */
4748 	np->rx_ring_size = ring->rx_pending;
4749 	np->tx_ring_size = ring->tx_pending;
4750 
4751 	if (!nv_optimized(np)) {
4752 		np->rx_ring.orig = (struct ring_desc *)rxtx_ring;
4753 		np->tx_ring.orig = &np->rx_ring.orig[np->rx_ring_size];
4754 	} else {
4755 		np->rx_ring.ex = (struct ring_desc_ex *)rxtx_ring;
4756 		np->tx_ring.ex = &np->rx_ring.ex[np->rx_ring_size];
4757 	}
4758 	np->rx_skb = (struct nv_skb_map *)rx_skbuff;
4759 	np->tx_skb = (struct nv_skb_map *)tx_skbuff;
4760 	np->ring_addr = ring_addr;
4761 
4762 	memset(np->rx_skb, 0, sizeof(struct nv_skb_map) * np->rx_ring_size);
4763 	memset(np->tx_skb, 0, sizeof(struct nv_skb_map) * np->tx_ring_size);
4764 
4765 	if (netif_running(dev)) {
4766 		/* reinit driver view of the queues */
4767 		set_bufsize(dev);
4768 		if (nv_init_ring(dev)) {
4769 			if (!np->in_shutdown)
4770 				mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
4771 		}
4772 
4773 		/* reinit nic view of the queues */
4774 		writel(np->rx_buf_sz, base + NvRegOffloadConfig);
4775 		setup_hw_rings(dev, NV_SETUP_RX_RING | NV_SETUP_TX_RING);
4776 		writel(((np->rx_ring_size-1) << NVREG_RINGSZ_RXSHIFT) + ((np->tx_ring_size-1) << NVREG_RINGSZ_TXSHIFT),
4777 			base + NvRegRingSizes);
4778 		pci_push(base);
4779 		writel(NVREG_TXRXCTL_KICK|np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl);
4780 		pci_push(base);
4781 
4782 		/* restart engines */
4783 		nv_start_rxtx(dev);
4784 		spin_unlock(&np->lock);
4785 		netif_addr_unlock(dev);
4786 		netif_tx_unlock_bh(dev);
4787 		nv_napi_enable(dev);
4788 		nv_enable_irq(dev);
4789 	}
4790 	return 0;
4791 exit:
4792 	return -ENOMEM;
4793 }
4794 
nv_get_pauseparam(struct net_device * dev,struct ethtool_pauseparam * pause)4795 static void nv_get_pauseparam(struct net_device *dev, struct ethtool_pauseparam* pause)
4796 {
4797 	struct fe_priv *np = netdev_priv(dev);
4798 
4799 	pause->autoneg = (np->pause_flags & NV_PAUSEFRAME_AUTONEG) != 0;
4800 	pause->rx_pause = (np->pause_flags & NV_PAUSEFRAME_RX_ENABLE) != 0;
4801 	pause->tx_pause = (np->pause_flags & NV_PAUSEFRAME_TX_ENABLE) != 0;
4802 }
4803 
nv_set_pauseparam(struct net_device * dev,struct ethtool_pauseparam * pause)4804 static int nv_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam* pause)
4805 {
4806 	struct fe_priv *np = netdev_priv(dev);
4807 	int adv, bmcr;
4808 
4809 	if ((!np->autoneg && np->duplex == 0) ||
4810 	    (np->autoneg && !pause->autoneg && np->duplex == 0)) {
4811 		netdev_info(dev, "can not set pause settings when forced link is in half duplex\n");
4812 		return -EINVAL;
4813 	}
4814 	if (pause->tx_pause && !(np->pause_flags & NV_PAUSEFRAME_TX_CAPABLE)) {
4815 		netdev_info(dev, "hardware does not support tx pause frames\n");
4816 		return -EINVAL;
4817 	}
4818 
4819 	netif_carrier_off(dev);
4820 	if (netif_running(dev)) {
4821 		nv_disable_irq(dev);
4822 		netif_tx_lock_bh(dev);
4823 		netif_addr_lock(dev);
4824 		spin_lock(&np->lock);
4825 		/* stop engines */
4826 		nv_stop_rxtx(dev);
4827 		spin_unlock(&np->lock);
4828 		netif_addr_unlock(dev);
4829 		netif_tx_unlock_bh(dev);
4830 	}
4831 
4832 	np->pause_flags &= ~(NV_PAUSEFRAME_RX_REQ|NV_PAUSEFRAME_TX_REQ);
4833 	if (pause->rx_pause)
4834 		np->pause_flags |= NV_PAUSEFRAME_RX_REQ;
4835 	if (pause->tx_pause)
4836 		np->pause_flags |= NV_PAUSEFRAME_TX_REQ;
4837 
4838 	if (np->autoneg && pause->autoneg) {
4839 		np->pause_flags |= NV_PAUSEFRAME_AUTONEG;
4840 
4841 		adv = mii_rw(dev, np->phyaddr, MII_ADVERTISE, MII_READ);
4842 		adv &= ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
4843 		if (np->pause_flags & NV_PAUSEFRAME_RX_REQ) /* for rx we set both advertisements but disable tx pause */
4844 			adv |=  ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
4845 		if (np->pause_flags & NV_PAUSEFRAME_TX_REQ)
4846 			adv |=  ADVERTISE_PAUSE_ASYM;
4847 		mii_rw(dev, np->phyaddr, MII_ADVERTISE, adv);
4848 
4849 		if (netif_running(dev))
4850 			netdev_info(dev, "link down\n");
4851 		bmcr = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
4852 		bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
4853 		mii_rw(dev, np->phyaddr, MII_BMCR, bmcr);
4854 	} else {
4855 		np->pause_flags &= ~(NV_PAUSEFRAME_AUTONEG|NV_PAUSEFRAME_RX_ENABLE|NV_PAUSEFRAME_TX_ENABLE);
4856 		if (pause->rx_pause)
4857 			np->pause_flags |= NV_PAUSEFRAME_RX_ENABLE;
4858 		if (pause->tx_pause)
4859 			np->pause_flags |= NV_PAUSEFRAME_TX_ENABLE;
4860 
4861 		if (!netif_running(dev))
4862 			nv_update_linkspeed(dev);
4863 		else
4864 			nv_update_pause(dev, np->pause_flags);
4865 	}
4866 
4867 	if (netif_running(dev)) {
4868 		nv_start_rxtx(dev);
4869 		nv_enable_irq(dev);
4870 	}
4871 	return 0;
4872 }
4873 
nv_set_loopback(struct net_device * dev,netdev_features_t features)4874 static int nv_set_loopback(struct net_device *dev, netdev_features_t features)
4875 {
4876 	struct fe_priv *np = netdev_priv(dev);
4877 	unsigned long flags;
4878 	u32 miicontrol;
4879 	int err, retval = 0;
4880 
4881 	spin_lock_irqsave(&np->lock, flags);
4882 	miicontrol = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
4883 	if (features & NETIF_F_LOOPBACK) {
4884 		if (miicontrol & BMCR_LOOPBACK) {
4885 			spin_unlock_irqrestore(&np->lock, flags);
4886 			netdev_info(dev, "Loopback already enabled\n");
4887 			return 0;
4888 		}
4889 		nv_disable_irq(dev);
4890 		/* Turn on loopback mode */
4891 		miicontrol |= BMCR_LOOPBACK | BMCR_FULLDPLX | BMCR_SPEED1000;
4892 		err = mii_rw(dev, np->phyaddr, MII_BMCR, miicontrol);
4893 		if (err) {
4894 			retval = PHY_ERROR;
4895 			spin_unlock_irqrestore(&np->lock, flags);
4896 			phy_init(dev);
4897 		} else {
4898 			if (netif_running(dev)) {
4899 				/* Force 1000 Mbps full-duplex */
4900 				nv_force_linkspeed(dev, NVREG_LINKSPEED_1000,
4901 									 1);
4902 				/* Force link up */
4903 				netif_carrier_on(dev);
4904 			}
4905 			spin_unlock_irqrestore(&np->lock, flags);
4906 			netdev_info(dev,
4907 				"Internal PHY loopback mode enabled.\n");
4908 		}
4909 	} else {
4910 		if (!(miicontrol & BMCR_LOOPBACK)) {
4911 			spin_unlock_irqrestore(&np->lock, flags);
4912 			netdev_info(dev, "Loopback already disabled\n");
4913 			return 0;
4914 		}
4915 		nv_disable_irq(dev);
4916 		/* Turn off loopback */
4917 		spin_unlock_irqrestore(&np->lock, flags);
4918 		netdev_info(dev, "Internal PHY loopback mode disabled.\n");
4919 		phy_init(dev);
4920 	}
4921 	msleep(500);
4922 	spin_lock_irqsave(&np->lock, flags);
4923 	nv_enable_irq(dev);
4924 	spin_unlock_irqrestore(&np->lock, flags);
4925 
4926 	return retval;
4927 }
4928 
nv_fix_features(struct net_device * dev,netdev_features_t features)4929 static netdev_features_t nv_fix_features(struct net_device *dev,
4930 	netdev_features_t features)
4931 {
4932 	/* vlan is dependent on rx checksum offload */
4933 	if (features & (NETIF_F_HW_VLAN_CTAG_TX|NETIF_F_HW_VLAN_CTAG_RX))
4934 		features |= NETIF_F_RXCSUM;
4935 
4936 	return features;
4937 }
4938 
nv_vlan_mode(struct net_device * dev,netdev_features_t features)4939 static void nv_vlan_mode(struct net_device *dev, netdev_features_t features)
4940 {
4941 	struct fe_priv *np = get_nvpriv(dev);
4942 
4943 	spin_lock_irq(&np->lock);
4944 
4945 	if (features & NETIF_F_HW_VLAN_CTAG_RX)
4946 		np->txrxctl_bits |= NVREG_TXRXCTL_VLANSTRIP;
4947 	else
4948 		np->txrxctl_bits &= ~NVREG_TXRXCTL_VLANSTRIP;
4949 
4950 	if (features & NETIF_F_HW_VLAN_CTAG_TX)
4951 		np->txrxctl_bits |= NVREG_TXRXCTL_VLANINS;
4952 	else
4953 		np->txrxctl_bits &= ~NVREG_TXRXCTL_VLANINS;
4954 
4955 	writel(np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl);
4956 
4957 	spin_unlock_irq(&np->lock);
4958 }
4959 
nv_set_features(struct net_device * dev,netdev_features_t features)4960 static int nv_set_features(struct net_device *dev, netdev_features_t features)
4961 {
4962 	struct fe_priv *np = netdev_priv(dev);
4963 	u8 __iomem *base = get_hwbase(dev);
4964 	netdev_features_t changed = dev->features ^ features;
4965 	int retval;
4966 
4967 	if ((changed & NETIF_F_LOOPBACK) && netif_running(dev)) {
4968 		retval = nv_set_loopback(dev, features);
4969 		if (retval != 0)
4970 			return retval;
4971 	}
4972 
4973 	if (changed & NETIF_F_RXCSUM) {
4974 		spin_lock_irq(&np->lock);
4975 
4976 		if (features & NETIF_F_RXCSUM)
4977 			np->txrxctl_bits |= NVREG_TXRXCTL_RXCHECK;
4978 		else
4979 			np->txrxctl_bits &= ~NVREG_TXRXCTL_RXCHECK;
4980 
4981 		if (netif_running(dev))
4982 			writel(np->txrxctl_bits, base + NvRegTxRxControl);
4983 
4984 		spin_unlock_irq(&np->lock);
4985 	}
4986 
4987 	if (changed & (NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX))
4988 		nv_vlan_mode(dev, features);
4989 
4990 	return 0;
4991 }
4992 
nv_get_sset_count(struct net_device * dev,int sset)4993 static int nv_get_sset_count(struct net_device *dev, int sset)
4994 {
4995 	struct fe_priv *np = netdev_priv(dev);
4996 
4997 	switch (sset) {
4998 	case ETH_SS_TEST:
4999 		if (np->driver_data & DEV_HAS_TEST_EXTENDED)
5000 			return NV_TEST_COUNT_EXTENDED;
5001 		else
5002 			return NV_TEST_COUNT_BASE;
5003 	case ETH_SS_STATS:
5004 		if (np->driver_data & DEV_HAS_STATISTICS_V3)
5005 			return NV_DEV_STATISTICS_V3_COUNT;
5006 		else if (np->driver_data & DEV_HAS_STATISTICS_V2)
5007 			return NV_DEV_STATISTICS_V2_COUNT;
5008 		else if (np->driver_data & DEV_HAS_STATISTICS_V1)
5009 			return NV_DEV_STATISTICS_V1_COUNT;
5010 		else
5011 			return 0;
5012 	default:
5013 		return -EOPNOTSUPP;
5014 	}
5015 }
5016 
nv_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * estats,u64 * buffer)5017 static void nv_get_ethtool_stats(struct net_device *dev,
5018 				 struct ethtool_stats *estats, u64 *buffer)
5019 	__acquires(&netdev_priv(dev)->hwstats_lock)
5020 	__releases(&netdev_priv(dev)->hwstats_lock)
5021 {
5022 	struct fe_priv *np = netdev_priv(dev);
5023 
5024 	spin_lock_bh(&np->hwstats_lock);
5025 	nv_update_stats(dev);
5026 	memcpy(buffer, &np->estats,
5027 	       nv_get_sset_count(dev, ETH_SS_STATS)*sizeof(u64));
5028 	spin_unlock_bh(&np->hwstats_lock);
5029 }
5030 
nv_link_test(struct net_device * dev)5031 static int nv_link_test(struct net_device *dev)
5032 {
5033 	struct fe_priv *np = netdev_priv(dev);
5034 	int mii_status;
5035 
5036 	mii_rw(dev, np->phyaddr, MII_BMSR, MII_READ);
5037 	mii_status = mii_rw(dev, np->phyaddr, MII_BMSR, MII_READ);
5038 
5039 	/* check phy link status */
5040 	if (!(mii_status & BMSR_LSTATUS))
5041 		return 0;
5042 	else
5043 		return 1;
5044 }
5045 
nv_register_test(struct net_device * dev)5046 static int nv_register_test(struct net_device *dev)
5047 {
5048 	u8 __iomem *base = get_hwbase(dev);
5049 	int i = 0;
5050 	u32 orig_read, new_read;
5051 
5052 	do {
5053 		orig_read = readl(base + nv_registers_test[i].reg);
5054 
5055 		/* xor with mask to toggle bits */
5056 		orig_read ^= nv_registers_test[i].mask;
5057 
5058 		writel(orig_read, base + nv_registers_test[i].reg);
5059 
5060 		new_read = readl(base + nv_registers_test[i].reg);
5061 
5062 		if ((new_read & nv_registers_test[i].mask) != (orig_read & nv_registers_test[i].mask))
5063 			return 0;
5064 
5065 		/* restore original value */
5066 		orig_read ^= nv_registers_test[i].mask;
5067 		writel(orig_read, base + nv_registers_test[i].reg);
5068 
5069 	} while (nv_registers_test[++i].reg != 0);
5070 
5071 	return 1;
5072 }
5073 
nv_interrupt_test(struct net_device * dev)5074 static int nv_interrupt_test(struct net_device *dev)
5075 {
5076 	struct fe_priv *np = netdev_priv(dev);
5077 	u8 __iomem *base = get_hwbase(dev);
5078 	int ret = 1;
5079 	int testcnt;
5080 	u32 save_msi_flags, save_poll_interval = 0;
5081 
5082 	if (netif_running(dev)) {
5083 		/* free current irq */
5084 		nv_free_irq(dev);
5085 		save_poll_interval = readl(base+NvRegPollingInterval);
5086 	}
5087 
5088 	/* flag to test interrupt handler */
5089 	np->intr_test = 0;
5090 
5091 	/* setup test irq */
5092 	save_msi_flags = np->msi_flags;
5093 	np->msi_flags &= ~NV_MSI_X_VECTORS_MASK;
5094 	np->msi_flags |= 0x001; /* setup 1 vector */
5095 	if (nv_request_irq(dev, 1))
5096 		return 0;
5097 
5098 	/* setup timer interrupt */
5099 	writel(NVREG_POLL_DEFAULT_CPU, base + NvRegPollingInterval);
5100 	writel(NVREG_UNKSETUP6_VAL, base + NvRegUnknownSetupReg6);
5101 
5102 	nv_enable_hw_interrupts(dev, NVREG_IRQ_TIMER);
5103 
5104 	/* wait for at least one interrupt */
5105 	msleep(100);
5106 
5107 	spin_lock_irq(&np->lock);
5108 
5109 	/* flag should be set within ISR */
5110 	testcnt = np->intr_test;
5111 	if (!testcnt)
5112 		ret = 2;
5113 
5114 	nv_disable_hw_interrupts(dev, NVREG_IRQ_TIMER);
5115 	if (!(np->msi_flags & NV_MSI_X_ENABLED))
5116 		writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus);
5117 	else
5118 		writel(NVREG_IRQSTAT_MASK, base + NvRegMSIXIrqStatus);
5119 
5120 	spin_unlock_irq(&np->lock);
5121 
5122 	nv_free_irq(dev);
5123 
5124 	np->msi_flags = save_msi_flags;
5125 
5126 	if (netif_running(dev)) {
5127 		writel(save_poll_interval, base + NvRegPollingInterval);
5128 		writel(NVREG_UNKSETUP6_VAL, base + NvRegUnknownSetupReg6);
5129 		/* restore original irq */
5130 		if (nv_request_irq(dev, 0))
5131 			return 0;
5132 	}
5133 
5134 	return ret;
5135 }
5136 
nv_loopback_test(struct net_device * dev)5137 static int nv_loopback_test(struct net_device *dev)
5138 {
5139 	struct fe_priv *np = netdev_priv(dev);
5140 	u8 __iomem *base = get_hwbase(dev);
5141 	struct sk_buff *tx_skb, *rx_skb;
5142 	dma_addr_t test_dma_addr;
5143 	u32 tx_flags_extra = (np->desc_ver == DESC_VER_1 ? NV_TX_LASTPACKET : NV_TX2_LASTPACKET);
5144 	u32 flags;
5145 	int len, i, pkt_len;
5146 	u8 *pkt_data;
5147 	u32 filter_flags = 0;
5148 	u32 misc1_flags = 0;
5149 	int ret = 1;
5150 
5151 	if (netif_running(dev)) {
5152 		nv_disable_irq(dev);
5153 		filter_flags = readl(base + NvRegPacketFilterFlags);
5154 		misc1_flags = readl(base + NvRegMisc1);
5155 	} else {
5156 		nv_txrx_reset(dev);
5157 	}
5158 
5159 	/* reinit driver view of the rx queue */
5160 	set_bufsize(dev);
5161 	nv_init_ring(dev);
5162 
5163 	/* setup hardware for loopback */
5164 	writel(NVREG_MISC1_FORCE, base + NvRegMisc1);
5165 	writel(NVREG_PFF_ALWAYS | NVREG_PFF_LOOPBACK, base + NvRegPacketFilterFlags);
5166 
5167 	/* reinit nic view of the rx queue */
5168 	writel(np->rx_buf_sz, base + NvRegOffloadConfig);
5169 	setup_hw_rings(dev, NV_SETUP_RX_RING | NV_SETUP_TX_RING);
5170 	writel(((np->rx_ring_size-1) << NVREG_RINGSZ_RXSHIFT) + ((np->tx_ring_size-1) << NVREG_RINGSZ_TXSHIFT),
5171 		base + NvRegRingSizes);
5172 	pci_push(base);
5173 
5174 	/* restart rx engine */
5175 	nv_start_rxtx(dev);
5176 
5177 	/* setup packet for tx */
5178 	pkt_len = ETH_DATA_LEN;
5179 	tx_skb = netdev_alloc_skb(dev, pkt_len);
5180 	if (!tx_skb) {
5181 		ret = 0;
5182 		goto out;
5183 	}
5184 	test_dma_addr = dma_map_single(&np->pci_dev->dev, tx_skb->data,
5185 				       skb_tailroom(tx_skb),
5186 				       DMA_FROM_DEVICE);
5187 	if (unlikely(dma_mapping_error(&np->pci_dev->dev,
5188 				       test_dma_addr))) {
5189 		dev_kfree_skb_any(tx_skb);
5190 		goto out;
5191 	}
5192 	pkt_data = skb_put(tx_skb, pkt_len);
5193 	for (i = 0; i < pkt_len; i++)
5194 		pkt_data[i] = (u8)(i & 0xff);
5195 
5196 	if (!nv_optimized(np)) {
5197 		np->tx_ring.orig[0].buf = cpu_to_le32(test_dma_addr);
5198 		np->tx_ring.orig[0].flaglen = cpu_to_le32((pkt_len-1) | np->tx_flags | tx_flags_extra);
5199 	} else {
5200 		np->tx_ring.ex[0].bufhigh = cpu_to_le32(dma_high(test_dma_addr));
5201 		np->tx_ring.ex[0].buflow = cpu_to_le32(dma_low(test_dma_addr));
5202 		np->tx_ring.ex[0].flaglen = cpu_to_le32((pkt_len-1) | np->tx_flags | tx_flags_extra);
5203 	}
5204 	writel(NVREG_TXRXCTL_KICK|np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl);
5205 	pci_push(get_hwbase(dev));
5206 
5207 	msleep(500);
5208 
5209 	/* check for rx of the packet */
5210 	if (!nv_optimized(np)) {
5211 		flags = le32_to_cpu(np->rx_ring.orig[0].flaglen);
5212 		len = nv_descr_getlength(&np->rx_ring.orig[0], np->desc_ver);
5213 
5214 	} else {
5215 		flags = le32_to_cpu(np->rx_ring.ex[0].flaglen);
5216 		len = nv_descr_getlength_ex(&np->rx_ring.ex[0], np->desc_ver);
5217 	}
5218 
5219 	if (flags & NV_RX_AVAIL) {
5220 		ret = 0;
5221 	} else if (np->desc_ver == DESC_VER_1) {
5222 		if (flags & NV_RX_ERROR)
5223 			ret = 0;
5224 	} else {
5225 		if (flags & NV_RX2_ERROR)
5226 			ret = 0;
5227 	}
5228 
5229 	if (ret) {
5230 		if (len != pkt_len) {
5231 			ret = 0;
5232 		} else {
5233 			rx_skb = np->rx_skb[0].skb;
5234 			for (i = 0; i < pkt_len; i++) {
5235 				if (rx_skb->data[i] != (u8)(i & 0xff)) {
5236 					ret = 0;
5237 					break;
5238 				}
5239 			}
5240 		}
5241 	}
5242 
5243 	dma_unmap_single(&np->pci_dev->dev, test_dma_addr,
5244 			 (skb_end_pointer(tx_skb) - tx_skb->data),
5245 			 DMA_TO_DEVICE);
5246 	dev_kfree_skb_any(tx_skb);
5247  out:
5248 	/* stop engines */
5249 	nv_stop_rxtx(dev);
5250 	nv_txrx_reset(dev);
5251 	/* drain rx queue */
5252 	nv_drain_rxtx(dev);
5253 
5254 	if (netif_running(dev)) {
5255 		writel(misc1_flags, base + NvRegMisc1);
5256 		writel(filter_flags, base + NvRegPacketFilterFlags);
5257 		nv_enable_irq(dev);
5258 	}
5259 
5260 	return ret;
5261 }
5262 
nv_self_test(struct net_device * dev,struct ethtool_test * test,u64 * buffer)5263 static void nv_self_test(struct net_device *dev, struct ethtool_test *test, u64 *buffer)
5264 {
5265 	struct fe_priv *np = netdev_priv(dev);
5266 	u8 __iomem *base = get_hwbase(dev);
5267 	int result, count;
5268 
5269 	count = nv_get_sset_count(dev, ETH_SS_TEST);
5270 	memset(buffer, 0, count * sizeof(u64));
5271 
5272 	if (!nv_link_test(dev)) {
5273 		test->flags |= ETH_TEST_FL_FAILED;
5274 		buffer[0] = 1;
5275 	}
5276 
5277 	if (test->flags & ETH_TEST_FL_OFFLINE) {
5278 		if (netif_running(dev)) {
5279 			netif_stop_queue(dev);
5280 			nv_napi_disable(dev);
5281 			netif_tx_lock_bh(dev);
5282 			netif_addr_lock(dev);
5283 			spin_lock_irq(&np->lock);
5284 			nv_disable_hw_interrupts(dev, np->irqmask);
5285 			if (!(np->msi_flags & NV_MSI_X_ENABLED))
5286 				writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus);
5287 			else
5288 				writel(NVREG_IRQSTAT_MASK, base + NvRegMSIXIrqStatus);
5289 			/* stop engines */
5290 			nv_stop_rxtx(dev);
5291 			nv_txrx_reset(dev);
5292 			/* drain rx queue */
5293 			nv_drain_rxtx(dev);
5294 			spin_unlock_irq(&np->lock);
5295 			netif_addr_unlock(dev);
5296 			netif_tx_unlock_bh(dev);
5297 		}
5298 
5299 		if (!nv_register_test(dev)) {
5300 			test->flags |= ETH_TEST_FL_FAILED;
5301 			buffer[1] = 1;
5302 		}
5303 
5304 		result = nv_interrupt_test(dev);
5305 		if (result != 1) {
5306 			test->flags |= ETH_TEST_FL_FAILED;
5307 			buffer[2] = 1;
5308 		}
5309 		if (result == 0) {
5310 			/* bail out */
5311 			return;
5312 		}
5313 
5314 		if (count > NV_TEST_COUNT_BASE && !nv_loopback_test(dev)) {
5315 			test->flags |= ETH_TEST_FL_FAILED;
5316 			buffer[3] = 1;
5317 		}
5318 
5319 		if (netif_running(dev)) {
5320 			/* reinit driver view of the rx queue */
5321 			set_bufsize(dev);
5322 			if (nv_init_ring(dev)) {
5323 				if (!np->in_shutdown)
5324 					mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
5325 			}
5326 			/* reinit nic view of the rx queue */
5327 			writel(np->rx_buf_sz, base + NvRegOffloadConfig);
5328 			setup_hw_rings(dev, NV_SETUP_RX_RING | NV_SETUP_TX_RING);
5329 			writel(((np->rx_ring_size-1) << NVREG_RINGSZ_RXSHIFT) + ((np->tx_ring_size-1) << NVREG_RINGSZ_TXSHIFT),
5330 				base + NvRegRingSizes);
5331 			pci_push(base);
5332 			writel(NVREG_TXRXCTL_KICK|np->txrxctl_bits, get_hwbase(dev) + NvRegTxRxControl);
5333 			pci_push(base);
5334 			/* restart rx engine */
5335 			nv_start_rxtx(dev);
5336 			netif_start_queue(dev);
5337 			nv_napi_enable(dev);
5338 			nv_enable_hw_interrupts(dev, np->irqmask);
5339 		}
5340 	}
5341 }
5342 
nv_get_strings(struct net_device * dev,u32 stringset,u8 * buffer)5343 static void nv_get_strings(struct net_device *dev, u32 stringset, u8 *buffer)
5344 {
5345 	switch (stringset) {
5346 	case ETH_SS_STATS:
5347 		memcpy(buffer, &nv_estats_str, nv_get_sset_count(dev, ETH_SS_STATS)*sizeof(struct nv_ethtool_str));
5348 		break;
5349 	case ETH_SS_TEST:
5350 		memcpy(buffer, &nv_etests_str, nv_get_sset_count(dev, ETH_SS_TEST)*sizeof(struct nv_ethtool_str));
5351 		break;
5352 	}
5353 }
5354 
5355 static const struct ethtool_ops ops = {
5356 	.get_drvinfo = nv_get_drvinfo,
5357 	.get_link = ethtool_op_get_link,
5358 	.get_wol = nv_get_wol,
5359 	.set_wol = nv_set_wol,
5360 	.get_regs_len = nv_get_regs_len,
5361 	.get_regs = nv_get_regs,
5362 	.nway_reset = nv_nway_reset,
5363 	.get_ringparam = nv_get_ringparam,
5364 	.set_ringparam = nv_set_ringparam,
5365 	.get_pauseparam = nv_get_pauseparam,
5366 	.set_pauseparam = nv_set_pauseparam,
5367 	.get_strings = nv_get_strings,
5368 	.get_ethtool_stats = nv_get_ethtool_stats,
5369 	.get_sset_count = nv_get_sset_count,
5370 	.self_test = nv_self_test,
5371 	.get_ts_info = ethtool_op_get_ts_info,
5372 	.get_link_ksettings = nv_get_link_ksettings,
5373 	.set_link_ksettings = nv_set_link_ksettings,
5374 };
5375 
5376 /* The mgmt unit and driver use a semaphore to access the phy during init */
nv_mgmt_acquire_sema(struct net_device * dev)5377 static int nv_mgmt_acquire_sema(struct net_device *dev)
5378 {
5379 	struct fe_priv *np = netdev_priv(dev);
5380 	u8 __iomem *base = get_hwbase(dev);
5381 	int i;
5382 	u32 tx_ctrl, mgmt_sema;
5383 
5384 	for (i = 0; i < 10; i++) {
5385 		mgmt_sema = readl(base + NvRegTransmitterControl) & NVREG_XMITCTL_MGMT_SEMA_MASK;
5386 		if (mgmt_sema == NVREG_XMITCTL_MGMT_SEMA_FREE)
5387 			break;
5388 		msleep(500);
5389 	}
5390 
5391 	if (mgmt_sema != NVREG_XMITCTL_MGMT_SEMA_FREE)
5392 		return 0;
5393 
5394 	for (i = 0; i < 2; i++) {
5395 		tx_ctrl = readl(base + NvRegTransmitterControl);
5396 		tx_ctrl |= NVREG_XMITCTL_HOST_SEMA_ACQ;
5397 		writel(tx_ctrl, base + NvRegTransmitterControl);
5398 
5399 		/* verify that semaphore was acquired */
5400 		tx_ctrl = readl(base + NvRegTransmitterControl);
5401 		if (((tx_ctrl & NVREG_XMITCTL_HOST_SEMA_MASK) == NVREG_XMITCTL_HOST_SEMA_ACQ) &&
5402 		    ((tx_ctrl & NVREG_XMITCTL_MGMT_SEMA_MASK) == NVREG_XMITCTL_MGMT_SEMA_FREE)) {
5403 			np->mgmt_sema = 1;
5404 			return 1;
5405 		} else
5406 			udelay(50);
5407 	}
5408 
5409 	return 0;
5410 }
5411 
nv_mgmt_release_sema(struct net_device * dev)5412 static void nv_mgmt_release_sema(struct net_device *dev)
5413 {
5414 	struct fe_priv *np = netdev_priv(dev);
5415 	u8 __iomem *base = get_hwbase(dev);
5416 	u32 tx_ctrl;
5417 
5418 	if (np->driver_data & DEV_HAS_MGMT_UNIT) {
5419 		if (np->mgmt_sema) {
5420 			tx_ctrl = readl(base + NvRegTransmitterControl);
5421 			tx_ctrl &= ~NVREG_XMITCTL_HOST_SEMA_ACQ;
5422 			writel(tx_ctrl, base + NvRegTransmitterControl);
5423 		}
5424 	}
5425 }
5426 
5427 
nv_mgmt_get_version(struct net_device * dev)5428 static int nv_mgmt_get_version(struct net_device *dev)
5429 {
5430 	struct fe_priv *np = netdev_priv(dev);
5431 	u8 __iomem *base = get_hwbase(dev);
5432 	u32 data_ready = readl(base + NvRegTransmitterControl);
5433 	u32 data_ready2 = 0;
5434 	unsigned long start;
5435 	int ready = 0;
5436 
5437 	writel(NVREG_MGMTUNITGETVERSION, base + NvRegMgmtUnitGetVersion);
5438 	writel(data_ready ^ NVREG_XMITCTL_DATA_START, base + NvRegTransmitterControl);
5439 	start = jiffies;
5440 	while (time_before(jiffies, start + 5*HZ)) {
5441 		data_ready2 = readl(base + NvRegTransmitterControl);
5442 		if ((data_ready & NVREG_XMITCTL_DATA_READY) != (data_ready2 & NVREG_XMITCTL_DATA_READY)) {
5443 			ready = 1;
5444 			break;
5445 		}
5446 		schedule_timeout_uninterruptible(1);
5447 	}
5448 
5449 	if (!ready || (data_ready2 & NVREG_XMITCTL_DATA_ERROR))
5450 		return 0;
5451 
5452 	np->mgmt_version = readl(base + NvRegMgmtUnitVersion) & NVREG_MGMTUNITVERSION;
5453 
5454 	return 1;
5455 }
5456 
nv_open(struct net_device * dev)5457 static int nv_open(struct net_device *dev)
5458 {
5459 	struct fe_priv *np = netdev_priv(dev);
5460 	u8 __iomem *base = get_hwbase(dev);
5461 	int ret = 1;
5462 	int oom, i;
5463 	u32 low;
5464 
5465 	/* power up phy */
5466 	mii_rw(dev, np->phyaddr, MII_BMCR,
5467 	       mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ) & ~BMCR_PDOWN);
5468 
5469 	nv_txrx_gate(dev, false);
5470 	/* erase previous misconfiguration */
5471 	if (np->driver_data & DEV_HAS_POWER_CNTRL)
5472 		nv_mac_reset(dev);
5473 	writel(NVREG_MCASTADDRA_FORCE, base + NvRegMulticastAddrA);
5474 	writel(0, base + NvRegMulticastAddrB);
5475 	writel(NVREG_MCASTMASKA_NONE, base + NvRegMulticastMaskA);
5476 	writel(NVREG_MCASTMASKB_NONE, base + NvRegMulticastMaskB);
5477 	writel(0, base + NvRegPacketFilterFlags);
5478 
5479 	writel(0, base + NvRegTransmitterControl);
5480 	writel(0, base + NvRegReceiverControl);
5481 
5482 	writel(0, base + NvRegAdapterControl);
5483 
5484 	if (np->pause_flags & NV_PAUSEFRAME_TX_CAPABLE)
5485 		writel(NVREG_TX_PAUSEFRAME_DISABLE,  base + NvRegTxPauseFrame);
5486 
5487 	/* initialize descriptor rings */
5488 	set_bufsize(dev);
5489 	oom = nv_init_ring(dev);
5490 
5491 	writel(0, base + NvRegLinkSpeed);
5492 	writel(readl(base + NvRegTransmitPoll) & NVREG_TRANSMITPOLL_MAC_ADDR_REV, base + NvRegTransmitPoll);
5493 	nv_txrx_reset(dev);
5494 	writel(0, base + NvRegUnknownSetupReg6);
5495 
5496 	np->in_shutdown = 0;
5497 
5498 	/* give hw rings */
5499 	setup_hw_rings(dev, NV_SETUP_RX_RING | NV_SETUP_TX_RING);
5500 	writel(((np->rx_ring_size-1) << NVREG_RINGSZ_RXSHIFT) + ((np->tx_ring_size-1) << NVREG_RINGSZ_TXSHIFT),
5501 		base + NvRegRingSizes);
5502 
5503 	writel(np->linkspeed, base + NvRegLinkSpeed);
5504 	if (np->desc_ver == DESC_VER_1)
5505 		writel(NVREG_TX_WM_DESC1_DEFAULT, base + NvRegTxWatermark);
5506 	else
5507 		writel(NVREG_TX_WM_DESC2_3_DEFAULT, base + NvRegTxWatermark);
5508 	writel(np->txrxctl_bits, base + NvRegTxRxControl);
5509 	writel(np->vlanctl_bits, base + NvRegVlanControl);
5510 	pci_push(base);
5511 	writel(NVREG_TXRXCTL_BIT1|np->txrxctl_bits, base + NvRegTxRxControl);
5512 	if (reg_delay(dev, NvRegUnknownSetupReg5,
5513 		      NVREG_UNKSETUP5_BIT31, NVREG_UNKSETUP5_BIT31,
5514 		      NV_SETUP5_DELAY, NV_SETUP5_DELAYMAX))
5515 		netdev_info(dev,
5516 			    "%s: SetupReg5, Bit 31 remained off\n", __func__);
5517 
5518 	writel(0, base + NvRegMIIMask);
5519 	writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus);
5520 	writel(NVREG_MIISTAT_MASK_ALL, base + NvRegMIIStatus);
5521 
5522 	writel(NVREG_MISC1_FORCE | NVREG_MISC1_HD, base + NvRegMisc1);
5523 	writel(readl(base + NvRegTransmitterStatus), base + NvRegTransmitterStatus);
5524 	writel(NVREG_PFF_ALWAYS, base + NvRegPacketFilterFlags);
5525 	writel(np->rx_buf_sz, base + NvRegOffloadConfig);
5526 
5527 	writel(readl(base + NvRegReceiverStatus), base + NvRegReceiverStatus);
5528 
5529 	get_random_bytes(&low, sizeof(low));
5530 	low &= NVREG_SLOTTIME_MASK;
5531 	if (np->desc_ver == DESC_VER_1) {
5532 		writel(low|NVREG_SLOTTIME_DEFAULT, base + NvRegSlotTime);
5533 	} else {
5534 		if (!(np->driver_data & DEV_HAS_GEAR_MODE)) {
5535 			/* setup legacy backoff */
5536 			writel(NVREG_SLOTTIME_LEGBF_ENABLED|NVREG_SLOTTIME_10_100_FULL|low, base + NvRegSlotTime);
5537 		} else {
5538 			writel(NVREG_SLOTTIME_10_100_FULL, base + NvRegSlotTime);
5539 			nv_gear_backoff_reseed(dev);
5540 		}
5541 	}
5542 	writel(NVREG_TX_DEFERRAL_DEFAULT, base + NvRegTxDeferral);
5543 	writel(NVREG_RX_DEFERRAL_DEFAULT, base + NvRegRxDeferral);
5544 	if (poll_interval == -1) {
5545 		if (optimization_mode == NV_OPTIMIZATION_MODE_THROUGHPUT)
5546 			writel(NVREG_POLL_DEFAULT_THROUGHPUT, base + NvRegPollingInterval);
5547 		else
5548 			writel(NVREG_POLL_DEFAULT_CPU, base + NvRegPollingInterval);
5549 	} else
5550 		writel(poll_interval & 0xFFFF, base + NvRegPollingInterval);
5551 	writel(NVREG_UNKSETUP6_VAL, base + NvRegUnknownSetupReg6);
5552 	writel((np->phyaddr << NVREG_ADAPTCTL_PHYSHIFT)|NVREG_ADAPTCTL_PHYVALID|NVREG_ADAPTCTL_RUNNING,
5553 			base + NvRegAdapterControl);
5554 	writel(NVREG_MIISPEED_BIT8|NVREG_MIIDELAY, base + NvRegMIISpeed);
5555 	writel(NVREG_MII_LINKCHANGE, base + NvRegMIIMask);
5556 	if (np->wolenabled)
5557 		writel(NVREG_WAKEUPFLAGS_ENABLE , base + NvRegWakeUpFlags);
5558 
5559 	i = readl(base + NvRegPowerState);
5560 	if ((i & NVREG_POWERSTATE_POWEREDUP) == 0)
5561 		writel(NVREG_POWERSTATE_POWEREDUP|i, base + NvRegPowerState);
5562 
5563 	pci_push(base);
5564 	udelay(10);
5565 	writel(readl(base + NvRegPowerState) | NVREG_POWERSTATE_VALID, base + NvRegPowerState);
5566 
5567 	nv_disable_hw_interrupts(dev, np->irqmask);
5568 	pci_push(base);
5569 	writel(NVREG_MIISTAT_MASK_ALL, base + NvRegMIIStatus);
5570 	writel(NVREG_IRQSTAT_MASK, base + NvRegIrqStatus);
5571 	pci_push(base);
5572 
5573 	if (nv_request_irq(dev, 0))
5574 		goto out_drain;
5575 
5576 	/* ask for interrupts */
5577 	nv_enable_hw_interrupts(dev, np->irqmask);
5578 
5579 	spin_lock_irq(&np->lock);
5580 	writel(NVREG_MCASTADDRA_FORCE, base + NvRegMulticastAddrA);
5581 	writel(0, base + NvRegMulticastAddrB);
5582 	writel(NVREG_MCASTMASKA_NONE, base + NvRegMulticastMaskA);
5583 	writel(NVREG_MCASTMASKB_NONE, base + NvRegMulticastMaskB);
5584 	writel(NVREG_PFF_ALWAYS|NVREG_PFF_MYADDR, base + NvRegPacketFilterFlags);
5585 	/* One manual link speed update: Interrupts are enabled, future link
5586 	 * speed changes cause interrupts and are handled by nv_link_irq().
5587 	 */
5588 	readl(base + NvRegMIIStatus);
5589 	writel(NVREG_MIISTAT_MASK_ALL, base + NvRegMIIStatus);
5590 
5591 	/* set linkspeed to invalid value, thus force nv_update_linkspeed
5592 	 * to init hw */
5593 	np->linkspeed = 0;
5594 	ret = nv_update_linkspeed(dev);
5595 	nv_start_rxtx(dev);
5596 	netif_start_queue(dev);
5597 	nv_napi_enable(dev);
5598 
5599 	if (ret) {
5600 		netif_carrier_on(dev);
5601 	} else {
5602 		netdev_info(dev, "no link during initialization\n");
5603 		netif_carrier_off(dev);
5604 	}
5605 	if (oom)
5606 		mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
5607 
5608 	/* start statistics timer */
5609 	if (np->driver_data & (DEV_HAS_STATISTICS_V1|DEV_HAS_STATISTICS_V2|DEV_HAS_STATISTICS_V3))
5610 		mod_timer(&np->stats_poll,
5611 			round_jiffies(jiffies + STATS_INTERVAL));
5612 
5613 	spin_unlock_irq(&np->lock);
5614 
5615 	/* If the loopback feature was set while the device was down, make sure
5616 	 * that it's set correctly now.
5617 	 */
5618 	if (dev->features & NETIF_F_LOOPBACK)
5619 		nv_set_loopback(dev, dev->features);
5620 
5621 	return 0;
5622 out_drain:
5623 	nv_drain_rxtx(dev);
5624 	return ret;
5625 }
5626 
nv_close(struct net_device * dev)5627 static int nv_close(struct net_device *dev)
5628 {
5629 	struct fe_priv *np = netdev_priv(dev);
5630 	u8 __iomem *base;
5631 
5632 	spin_lock_irq(&np->lock);
5633 	np->in_shutdown = 1;
5634 	spin_unlock_irq(&np->lock);
5635 	nv_napi_disable(dev);
5636 	synchronize_irq(np->pci_dev->irq);
5637 
5638 	del_timer_sync(&np->oom_kick);
5639 	del_timer_sync(&np->nic_poll);
5640 	del_timer_sync(&np->stats_poll);
5641 
5642 	netif_stop_queue(dev);
5643 	spin_lock_irq(&np->lock);
5644 	nv_update_pause(dev, 0); /* otherwise stop_tx bricks NIC */
5645 	nv_stop_rxtx(dev);
5646 	nv_txrx_reset(dev);
5647 
5648 	/* disable interrupts on the nic or we will lock up */
5649 	base = get_hwbase(dev);
5650 	nv_disable_hw_interrupts(dev, np->irqmask);
5651 	pci_push(base);
5652 
5653 	spin_unlock_irq(&np->lock);
5654 
5655 	nv_free_irq(dev);
5656 
5657 	nv_drain_rxtx(dev);
5658 
5659 	if (np->wolenabled || !phy_power_down) {
5660 		nv_txrx_gate(dev, false);
5661 		writel(NVREG_PFF_ALWAYS|NVREG_PFF_MYADDR, base + NvRegPacketFilterFlags);
5662 		nv_start_rx(dev);
5663 	} else {
5664 		/* power down phy */
5665 		mii_rw(dev, np->phyaddr, MII_BMCR,
5666 		       mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ)|BMCR_PDOWN);
5667 		nv_txrx_gate(dev, true);
5668 	}
5669 
5670 	/* FIXME: power down nic */
5671 
5672 	return 0;
5673 }
5674 
5675 static const struct net_device_ops nv_netdev_ops = {
5676 	.ndo_open		= nv_open,
5677 	.ndo_stop		= nv_close,
5678 	.ndo_get_stats64	= nv_get_stats64,
5679 	.ndo_start_xmit		= nv_start_xmit,
5680 	.ndo_tx_timeout		= nv_tx_timeout,
5681 	.ndo_change_mtu		= nv_change_mtu,
5682 	.ndo_fix_features	= nv_fix_features,
5683 	.ndo_set_features	= nv_set_features,
5684 	.ndo_validate_addr	= eth_validate_addr,
5685 	.ndo_set_mac_address	= nv_set_mac_address,
5686 	.ndo_set_rx_mode	= nv_set_multicast,
5687 #ifdef CONFIG_NET_POLL_CONTROLLER
5688 	.ndo_poll_controller	= nv_poll_controller,
5689 #endif
5690 };
5691 
5692 static const struct net_device_ops nv_netdev_ops_optimized = {
5693 	.ndo_open		= nv_open,
5694 	.ndo_stop		= nv_close,
5695 	.ndo_get_stats64	= nv_get_stats64,
5696 	.ndo_start_xmit		= nv_start_xmit_optimized,
5697 	.ndo_tx_timeout		= nv_tx_timeout,
5698 	.ndo_change_mtu		= nv_change_mtu,
5699 	.ndo_fix_features	= nv_fix_features,
5700 	.ndo_set_features	= nv_set_features,
5701 	.ndo_validate_addr	= eth_validate_addr,
5702 	.ndo_set_mac_address	= nv_set_mac_address,
5703 	.ndo_set_rx_mode	= nv_set_multicast,
5704 #ifdef CONFIG_NET_POLL_CONTROLLER
5705 	.ndo_poll_controller	= nv_poll_controller,
5706 #endif
5707 };
5708 
nv_probe(struct pci_dev * pci_dev,const struct pci_device_id * id)5709 static int nv_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
5710 {
5711 	struct net_device *dev;
5712 	struct fe_priv *np;
5713 	unsigned long addr;
5714 	u8 __iomem *base;
5715 	int err, i;
5716 	u32 powerstate, txreg;
5717 	u32 phystate_orig = 0, phystate;
5718 	int phyinitialized = 0;
5719 	static int printed_version;
5720 	u8 mac[ETH_ALEN];
5721 
5722 	if (!printed_version++)
5723 		pr_info("Reverse Engineered nForce ethernet driver. Version %s.\n",
5724 			FORCEDETH_VERSION);
5725 
5726 	dev = alloc_etherdev(sizeof(struct fe_priv));
5727 	err = -ENOMEM;
5728 	if (!dev)
5729 		goto out;
5730 
5731 	np = netdev_priv(dev);
5732 	np->dev = dev;
5733 	np->pci_dev = pci_dev;
5734 	spin_lock_init(&np->lock);
5735 	spin_lock_init(&np->hwstats_lock);
5736 	SET_NETDEV_DEV(dev, &pci_dev->dev);
5737 	u64_stats_init(&np->swstats_rx_syncp);
5738 	u64_stats_init(&np->swstats_tx_syncp);
5739 	np->txrx_stats = alloc_percpu(struct nv_txrx_stats);
5740 	if (!np->txrx_stats) {
5741 		pr_err("np->txrx_stats, alloc memory error.\n");
5742 		err = -ENOMEM;
5743 		goto out_alloc_percpu;
5744 	}
5745 
5746 	timer_setup(&np->oom_kick, nv_do_rx_refill, 0);
5747 	timer_setup(&np->nic_poll, nv_do_nic_poll, 0);
5748 	timer_setup(&np->stats_poll, nv_do_stats_poll, TIMER_DEFERRABLE);
5749 
5750 	err = pci_enable_device(pci_dev);
5751 	if (err)
5752 		goto out_free;
5753 
5754 	pci_set_master(pci_dev);
5755 
5756 	err = pci_request_regions(pci_dev, DRV_NAME);
5757 	if (err < 0)
5758 		goto out_disable;
5759 
5760 	if (id->driver_data & (DEV_HAS_VLAN|DEV_HAS_MSI_X|DEV_HAS_POWER_CNTRL|DEV_HAS_STATISTICS_V2|DEV_HAS_STATISTICS_V3))
5761 		np->register_size = NV_PCI_REGSZ_VER3;
5762 	else if (id->driver_data & DEV_HAS_STATISTICS_V1)
5763 		np->register_size = NV_PCI_REGSZ_VER2;
5764 	else
5765 		np->register_size = NV_PCI_REGSZ_VER1;
5766 
5767 	err = -EINVAL;
5768 	addr = 0;
5769 	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
5770 		if (pci_resource_flags(pci_dev, i) & IORESOURCE_MEM &&
5771 				pci_resource_len(pci_dev, i) >= np->register_size) {
5772 			addr = pci_resource_start(pci_dev, i);
5773 			break;
5774 		}
5775 	}
5776 	if (i == DEVICE_COUNT_RESOURCE) {
5777 		dev_info(&pci_dev->dev, "Couldn't find register window\n");
5778 		goto out_relreg;
5779 	}
5780 
5781 	/* copy of driver data */
5782 	np->driver_data = id->driver_data;
5783 	/* copy of device id */
5784 	np->device_id = id->device;
5785 
5786 	/* handle different descriptor versions */
5787 	if (id->driver_data & DEV_HAS_HIGH_DMA) {
5788 		/* packet format 3: supports 40-bit addressing */
5789 		np->desc_ver = DESC_VER_3;
5790 		np->txrxctl_bits = NVREG_TXRXCTL_DESC_3;
5791 		if (dma_64bit) {
5792 			if (dma_set_mask_and_coherent(&pci_dev->dev, DMA_BIT_MASK(39)))
5793 				dev_info(&pci_dev->dev,
5794 					 "64-bit DMA failed, using 32-bit addressing\n");
5795 			else
5796 				dev->features |= NETIF_F_HIGHDMA;
5797 		}
5798 	} else if (id->driver_data & DEV_HAS_LARGEDESC) {
5799 		/* packet format 2: supports jumbo frames */
5800 		np->desc_ver = DESC_VER_2;
5801 		np->txrxctl_bits = NVREG_TXRXCTL_DESC_2;
5802 	} else {
5803 		/* original packet format */
5804 		np->desc_ver = DESC_VER_1;
5805 		np->txrxctl_bits = NVREG_TXRXCTL_DESC_1;
5806 	}
5807 
5808 	np->pkt_limit = NV_PKTLIMIT_1;
5809 	if (id->driver_data & DEV_HAS_LARGEDESC)
5810 		np->pkt_limit = NV_PKTLIMIT_2;
5811 
5812 	if (id->driver_data & DEV_HAS_CHECKSUM) {
5813 		np->txrxctl_bits |= NVREG_TXRXCTL_RXCHECK;
5814 		dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_SG |
5815 			NETIF_F_TSO | NETIF_F_RXCSUM;
5816 	}
5817 
5818 	np->vlanctl_bits = 0;
5819 	if (id->driver_data & DEV_HAS_VLAN) {
5820 		np->vlanctl_bits = NVREG_VLANCONTROL_ENABLE;
5821 		dev->hw_features |= NETIF_F_HW_VLAN_CTAG_RX |
5822 				    NETIF_F_HW_VLAN_CTAG_TX;
5823 	}
5824 
5825 	dev->features |= dev->hw_features;
5826 
5827 	/* Add loopback capability to the device. */
5828 	dev->hw_features |= NETIF_F_LOOPBACK;
5829 
5830 	/* MTU range: 64 - 1500 or 9100 */
5831 	dev->min_mtu = ETH_ZLEN + ETH_FCS_LEN;
5832 	dev->max_mtu = np->pkt_limit;
5833 
5834 	np->pause_flags = NV_PAUSEFRAME_RX_CAPABLE | NV_PAUSEFRAME_RX_REQ | NV_PAUSEFRAME_AUTONEG;
5835 	if ((id->driver_data & DEV_HAS_PAUSEFRAME_TX_V1) ||
5836 	    (id->driver_data & DEV_HAS_PAUSEFRAME_TX_V2) ||
5837 	    (id->driver_data & DEV_HAS_PAUSEFRAME_TX_V3)) {
5838 		np->pause_flags |= NV_PAUSEFRAME_TX_CAPABLE | NV_PAUSEFRAME_TX_REQ;
5839 	}
5840 
5841 	err = -ENOMEM;
5842 	np->base = ioremap(addr, np->register_size);
5843 	if (!np->base)
5844 		goto out_relreg;
5845 
5846 	np->rx_ring_size = RX_RING_DEFAULT;
5847 	np->tx_ring_size = TX_RING_DEFAULT;
5848 
5849 	if (!nv_optimized(np)) {
5850 		np->rx_ring.orig = dma_alloc_coherent(&pci_dev->dev,
5851 						      sizeof(struct ring_desc) *
5852 						      (np->rx_ring_size +
5853 						      np->tx_ring_size),
5854 						      &np->ring_addr,
5855 						      GFP_KERNEL);
5856 		if (!np->rx_ring.orig)
5857 			goto out_unmap;
5858 		np->tx_ring.orig = &np->rx_ring.orig[np->rx_ring_size];
5859 	} else {
5860 		np->rx_ring.ex = dma_alloc_coherent(&pci_dev->dev,
5861 						    sizeof(struct ring_desc_ex) *
5862 						    (np->rx_ring_size +
5863 						    np->tx_ring_size),
5864 						    &np->ring_addr, GFP_KERNEL);
5865 		if (!np->rx_ring.ex)
5866 			goto out_unmap;
5867 		np->tx_ring.ex = &np->rx_ring.ex[np->rx_ring_size];
5868 	}
5869 	np->rx_skb = kcalloc(np->rx_ring_size, sizeof(struct nv_skb_map), GFP_KERNEL);
5870 	np->tx_skb = kcalloc(np->tx_ring_size, sizeof(struct nv_skb_map), GFP_KERNEL);
5871 	if (!np->rx_skb || !np->tx_skb)
5872 		goto out_freering;
5873 
5874 	if (!nv_optimized(np))
5875 		dev->netdev_ops = &nv_netdev_ops;
5876 	else
5877 		dev->netdev_ops = &nv_netdev_ops_optimized;
5878 
5879 	netif_napi_add(dev, &np->napi, nv_napi_poll);
5880 	dev->ethtool_ops = &ops;
5881 	dev->watchdog_timeo = NV_WATCHDOG_TIMEO;
5882 
5883 	pci_set_drvdata(pci_dev, dev);
5884 
5885 	/* read the mac address */
5886 	base = get_hwbase(dev);
5887 	np->orig_mac[0] = readl(base + NvRegMacAddrA);
5888 	np->orig_mac[1] = readl(base + NvRegMacAddrB);
5889 
5890 	/* check the workaround bit for correct mac address order */
5891 	txreg = readl(base + NvRegTransmitPoll);
5892 	if (id->driver_data & DEV_HAS_CORRECT_MACADDR) {
5893 		/* mac address is already in correct order */
5894 		mac[0] = (np->orig_mac[0] >>  0) & 0xff;
5895 		mac[1] = (np->orig_mac[0] >>  8) & 0xff;
5896 		mac[2] = (np->orig_mac[0] >> 16) & 0xff;
5897 		mac[3] = (np->orig_mac[0] >> 24) & 0xff;
5898 		mac[4] = (np->orig_mac[1] >>  0) & 0xff;
5899 		mac[5] = (np->orig_mac[1] >>  8) & 0xff;
5900 	} else if (txreg & NVREG_TRANSMITPOLL_MAC_ADDR_REV) {
5901 		/* mac address is already in correct order */
5902 		mac[0] = (np->orig_mac[0] >>  0) & 0xff;
5903 		mac[1] = (np->orig_mac[0] >>  8) & 0xff;
5904 		mac[2] = (np->orig_mac[0] >> 16) & 0xff;
5905 		mac[3] = (np->orig_mac[0] >> 24) & 0xff;
5906 		mac[4] = (np->orig_mac[1] >>  0) & 0xff;
5907 		mac[5] = (np->orig_mac[1] >>  8) & 0xff;
5908 		/*
5909 		 * Set orig mac address back to the reversed version.
5910 		 * This flag will be cleared during low power transition.
5911 		 * Therefore, we should always put back the reversed address.
5912 		 */
5913 		np->orig_mac[0] = (mac[5] << 0) + (mac[4] << 8) +
5914 			(mac[3] << 16) + (mac[2] << 24);
5915 		np->orig_mac[1] = (mac[1] << 0) + (mac[0] << 8);
5916 	} else {
5917 		/* need to reverse mac address to correct order */
5918 		mac[0] = (np->orig_mac[1] >>  8) & 0xff;
5919 		mac[1] = (np->orig_mac[1] >>  0) & 0xff;
5920 		mac[2] = (np->orig_mac[0] >> 24) & 0xff;
5921 		mac[3] = (np->orig_mac[0] >> 16) & 0xff;
5922 		mac[4] = (np->orig_mac[0] >>  8) & 0xff;
5923 		mac[5] = (np->orig_mac[0] >>  0) & 0xff;
5924 		writel(txreg|NVREG_TRANSMITPOLL_MAC_ADDR_REV, base + NvRegTransmitPoll);
5925 		dev_dbg(&pci_dev->dev,
5926 			"%s: set workaround bit for reversed mac addr\n",
5927 			__func__);
5928 	}
5929 
5930 	if (is_valid_ether_addr(mac)) {
5931 		eth_hw_addr_set(dev, mac);
5932 	} else {
5933 		/*
5934 		 * Bad mac address. At least one bios sets the mac address
5935 		 * to 01:23:45:67:89:ab
5936 		 */
5937 		dev_err(&pci_dev->dev,
5938 			"Invalid MAC address detected: %pM - Please complain to your hardware vendor.\n",
5939 			mac);
5940 		eth_hw_addr_random(dev);
5941 		dev_err(&pci_dev->dev,
5942 			"Using random MAC address: %pM\n", dev->dev_addr);
5943 	}
5944 
5945 	/* set mac address */
5946 	nv_copy_mac_to_hw(dev);
5947 
5948 	/* disable WOL */
5949 	writel(0, base + NvRegWakeUpFlags);
5950 	np->wolenabled = 0;
5951 	device_set_wakeup_enable(&pci_dev->dev, false);
5952 
5953 	if (id->driver_data & DEV_HAS_POWER_CNTRL) {
5954 
5955 		/* take phy and nic out of low power mode */
5956 		powerstate = readl(base + NvRegPowerState2);
5957 		powerstate &= ~NVREG_POWERSTATE2_POWERUP_MASK;
5958 		if ((id->driver_data & DEV_NEED_LOW_POWER_FIX) &&
5959 		    pci_dev->revision >= 0xA3)
5960 			powerstate |= NVREG_POWERSTATE2_POWERUP_REV_A3;
5961 		writel(powerstate, base + NvRegPowerState2);
5962 	}
5963 
5964 	if (np->desc_ver == DESC_VER_1)
5965 		np->tx_flags = NV_TX_VALID;
5966 	else
5967 		np->tx_flags = NV_TX2_VALID;
5968 
5969 	np->msi_flags = 0;
5970 	if ((id->driver_data & DEV_HAS_MSI) && msi)
5971 		np->msi_flags |= NV_MSI_CAPABLE;
5972 
5973 	if ((id->driver_data & DEV_HAS_MSI_X) && msix) {
5974 		/* msix has had reported issues when modifying irqmask
5975 		   as in the case of napi, therefore, disable for now
5976 		*/
5977 #if 0
5978 		np->msi_flags |= NV_MSI_X_CAPABLE;
5979 #endif
5980 	}
5981 
5982 	if (optimization_mode == NV_OPTIMIZATION_MODE_CPU) {
5983 		np->irqmask = NVREG_IRQMASK_CPU;
5984 		if (np->msi_flags & NV_MSI_X_CAPABLE) /* set number of vectors */
5985 			np->msi_flags |= 0x0001;
5986 	} else if (optimization_mode == NV_OPTIMIZATION_MODE_DYNAMIC &&
5987 		   !(id->driver_data & DEV_NEED_TIMERIRQ)) {
5988 		/* start off in throughput mode */
5989 		np->irqmask = NVREG_IRQMASK_THROUGHPUT;
5990 		/* remove support for msix mode */
5991 		np->msi_flags &= ~NV_MSI_X_CAPABLE;
5992 	} else {
5993 		optimization_mode = NV_OPTIMIZATION_MODE_THROUGHPUT;
5994 		np->irqmask = NVREG_IRQMASK_THROUGHPUT;
5995 		if (np->msi_flags & NV_MSI_X_CAPABLE) /* set number of vectors */
5996 			np->msi_flags |= 0x0003;
5997 	}
5998 
5999 	if (id->driver_data & DEV_NEED_TIMERIRQ)
6000 		np->irqmask |= NVREG_IRQ_TIMER;
6001 	if (id->driver_data & DEV_NEED_LINKTIMER) {
6002 		np->need_linktimer = 1;
6003 		np->link_timeout = jiffies + LINK_TIMEOUT;
6004 	} else {
6005 		np->need_linktimer = 0;
6006 	}
6007 
6008 	/* Limit the number of tx's outstanding for hw bug */
6009 	if (id->driver_data & DEV_NEED_TX_LIMIT) {
6010 		np->tx_limit = 1;
6011 		if (((id->driver_data & DEV_NEED_TX_LIMIT2) == DEV_NEED_TX_LIMIT2) &&
6012 		    pci_dev->revision >= 0xA2)
6013 			np->tx_limit = 0;
6014 	}
6015 
6016 	/* clear phy state and temporarily halt phy interrupts */
6017 	writel(0, base + NvRegMIIMask);
6018 	phystate = readl(base + NvRegAdapterControl);
6019 	if (phystate & NVREG_ADAPTCTL_RUNNING) {
6020 		phystate_orig = 1;
6021 		phystate &= ~NVREG_ADAPTCTL_RUNNING;
6022 		writel(phystate, base + NvRegAdapterControl);
6023 	}
6024 	writel(NVREG_MIISTAT_MASK_ALL, base + NvRegMIIStatus);
6025 
6026 	if (id->driver_data & DEV_HAS_MGMT_UNIT) {
6027 		/* management unit running on the mac? */
6028 		if ((readl(base + NvRegTransmitterControl) & NVREG_XMITCTL_MGMT_ST) &&
6029 		    (readl(base + NvRegTransmitterControl) & NVREG_XMITCTL_SYNC_PHY_INIT) &&
6030 		    nv_mgmt_acquire_sema(dev) &&
6031 		    nv_mgmt_get_version(dev)) {
6032 			np->mac_in_use = 1;
6033 			if (np->mgmt_version > 0)
6034 				np->mac_in_use = readl(base + NvRegMgmtUnitControl) & NVREG_MGMTUNITCONTROL_INUSE;
6035 			/* management unit setup the phy already? */
6036 			if (np->mac_in_use &&
6037 			    ((readl(base + NvRegTransmitterControl) & NVREG_XMITCTL_SYNC_MASK) ==
6038 			     NVREG_XMITCTL_SYNC_PHY_INIT)) {
6039 				/* phy is inited by mgmt unit */
6040 				phyinitialized = 1;
6041 			} else {
6042 				/* we need to init the phy */
6043 			}
6044 		}
6045 	}
6046 
6047 	/* find a suitable phy */
6048 	for (i = 1; i <= 32; i++) {
6049 		int id1, id2;
6050 		int phyaddr = i & 0x1F;
6051 
6052 		spin_lock_irq(&np->lock);
6053 		id1 = mii_rw(dev, phyaddr, MII_PHYSID1, MII_READ);
6054 		spin_unlock_irq(&np->lock);
6055 		if (id1 < 0 || id1 == 0xffff)
6056 			continue;
6057 		spin_lock_irq(&np->lock);
6058 		id2 = mii_rw(dev, phyaddr, MII_PHYSID2, MII_READ);
6059 		spin_unlock_irq(&np->lock);
6060 		if (id2 < 0 || id2 == 0xffff)
6061 			continue;
6062 
6063 		np->phy_model = id2 & PHYID2_MODEL_MASK;
6064 		id1 = (id1 & PHYID1_OUI_MASK) << PHYID1_OUI_SHFT;
6065 		id2 = (id2 & PHYID2_OUI_MASK) >> PHYID2_OUI_SHFT;
6066 		np->phyaddr = phyaddr;
6067 		np->phy_oui = id1 | id2;
6068 
6069 		/* Realtek hardcoded phy id1 to all zero's on certain phys */
6070 		if (np->phy_oui == PHY_OUI_REALTEK2)
6071 			np->phy_oui = PHY_OUI_REALTEK;
6072 		/* Setup phy revision for Realtek */
6073 		if (np->phy_oui == PHY_OUI_REALTEK && np->phy_model == PHY_MODEL_REALTEK_8211)
6074 			np->phy_rev = mii_rw(dev, phyaddr, MII_RESV1, MII_READ) & PHY_REV_MASK;
6075 
6076 		break;
6077 	}
6078 	if (i == 33) {
6079 		dev_info(&pci_dev->dev, "open: Could not find a valid PHY\n");
6080 		goto out_error;
6081 	}
6082 
6083 	if (!phyinitialized) {
6084 		/* reset it */
6085 		phy_init(dev);
6086 	} else {
6087 		/* see if it is a gigabit phy */
6088 		u32 mii_status = mii_rw(dev, np->phyaddr, MII_BMSR, MII_READ);
6089 		if (mii_status & PHY_GIGABIT)
6090 			np->gigabit = PHY_GIGABIT;
6091 	}
6092 
6093 	/* set default link speed settings */
6094 	np->linkspeed = NVREG_LINKSPEED_FORCE|NVREG_LINKSPEED_10;
6095 	np->duplex = 0;
6096 	np->autoneg = 1;
6097 
6098 	err = register_netdev(dev);
6099 	if (err) {
6100 		dev_info(&pci_dev->dev, "unable to register netdev: %d\n", err);
6101 		goto out_error;
6102 	}
6103 
6104 	netif_carrier_off(dev);
6105 
6106 	/* Some NICs freeze when TX pause is enabled while NIC is
6107 	 * down, and this stays across warm reboots. The sequence
6108 	 * below should be enough to recover from that state.
6109 	 */
6110 	nv_update_pause(dev, 0);
6111 	nv_start_tx(dev);
6112 	nv_stop_tx(dev);
6113 
6114 	if (id->driver_data & DEV_HAS_VLAN)
6115 		nv_vlan_mode(dev, dev->features);
6116 
6117 	dev_info(&pci_dev->dev, "ifname %s, PHY OUI 0x%x @ %d, addr %pM\n",
6118 		 dev->name, np->phy_oui, np->phyaddr, dev->dev_addr);
6119 
6120 	dev_info(&pci_dev->dev, "%s%s%s%s%s%s%s%s%s%s%sdesc-v%u\n",
6121 		 dev->features & NETIF_F_HIGHDMA ? "highdma " : "",
6122 		 dev->features & (NETIF_F_IP_CSUM | NETIF_F_SG) ?
6123 			"csum " : "",
6124 		 dev->features & (NETIF_F_HW_VLAN_CTAG_RX |
6125 				  NETIF_F_HW_VLAN_CTAG_TX) ?
6126 			"vlan " : "",
6127 		 dev->features & (NETIF_F_LOOPBACK) ?
6128 			"loopback " : "",
6129 		 id->driver_data & DEV_HAS_POWER_CNTRL ? "pwrctl " : "",
6130 		 id->driver_data & DEV_HAS_MGMT_UNIT ? "mgmt " : "",
6131 		 id->driver_data & DEV_NEED_TIMERIRQ ? "timirq " : "",
6132 		 np->gigabit == PHY_GIGABIT ? "gbit " : "",
6133 		 np->need_linktimer ? "lnktim " : "",
6134 		 np->msi_flags & NV_MSI_CAPABLE ? "msi " : "",
6135 		 np->msi_flags & NV_MSI_X_CAPABLE ? "msi-x " : "",
6136 		 np->desc_ver);
6137 
6138 	return 0;
6139 
6140 out_error:
6141 	nv_mgmt_release_sema(dev);
6142 	if (phystate_orig)
6143 		writel(phystate|NVREG_ADAPTCTL_RUNNING, base + NvRegAdapterControl);
6144 out_freering:
6145 	free_rings(dev);
6146 out_unmap:
6147 	iounmap(get_hwbase(dev));
6148 out_relreg:
6149 	pci_release_regions(pci_dev);
6150 out_disable:
6151 	pci_disable_device(pci_dev);
6152 out_free:
6153 	free_percpu(np->txrx_stats);
6154 out_alloc_percpu:
6155 	free_netdev(dev);
6156 out:
6157 	return err;
6158 }
6159 
nv_restore_phy(struct net_device * dev)6160 static void nv_restore_phy(struct net_device *dev)
6161 {
6162 	struct fe_priv *np = netdev_priv(dev);
6163 	u16 phy_reserved, mii_control;
6164 
6165 	if (np->phy_oui == PHY_OUI_REALTEK &&
6166 	    np->phy_model == PHY_MODEL_REALTEK_8201 &&
6167 	    phy_cross == NV_CROSSOVER_DETECTION_DISABLED) {
6168 		mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT3);
6169 		phy_reserved = mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG2, MII_READ);
6170 		phy_reserved &= ~PHY_REALTEK_INIT_MSK1;
6171 		phy_reserved |= PHY_REALTEK_INIT8;
6172 		mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG2, phy_reserved);
6173 		mii_rw(dev, np->phyaddr, PHY_REALTEK_INIT_REG1, PHY_REALTEK_INIT1);
6174 
6175 		/* restart auto negotiation */
6176 		mii_control = mii_rw(dev, np->phyaddr, MII_BMCR, MII_READ);
6177 		mii_control |= (BMCR_ANRESTART | BMCR_ANENABLE);
6178 		mii_rw(dev, np->phyaddr, MII_BMCR, mii_control);
6179 	}
6180 }
6181 
nv_restore_mac_addr(struct pci_dev * pci_dev)6182 static void nv_restore_mac_addr(struct pci_dev *pci_dev)
6183 {
6184 	struct net_device *dev = pci_get_drvdata(pci_dev);
6185 	struct fe_priv *np = netdev_priv(dev);
6186 	u8 __iomem *base = get_hwbase(dev);
6187 
6188 	/* special op: write back the misordered MAC address - otherwise
6189 	 * the next nv_probe would see a wrong address.
6190 	 */
6191 	writel(np->orig_mac[0], base + NvRegMacAddrA);
6192 	writel(np->orig_mac[1], base + NvRegMacAddrB);
6193 	writel(readl(base + NvRegTransmitPoll) & ~NVREG_TRANSMITPOLL_MAC_ADDR_REV,
6194 	       base + NvRegTransmitPoll);
6195 }
6196 
nv_remove(struct pci_dev * pci_dev)6197 static void nv_remove(struct pci_dev *pci_dev)
6198 {
6199 	struct net_device *dev = pci_get_drvdata(pci_dev);
6200 	struct fe_priv *np = netdev_priv(dev);
6201 
6202 	free_percpu(np->txrx_stats);
6203 
6204 	unregister_netdev(dev);
6205 
6206 	nv_restore_mac_addr(pci_dev);
6207 
6208 	/* restore any phy related changes */
6209 	nv_restore_phy(dev);
6210 
6211 	nv_mgmt_release_sema(dev);
6212 
6213 	/* free all structures */
6214 	free_rings(dev);
6215 	iounmap(get_hwbase(dev));
6216 	pci_release_regions(pci_dev);
6217 	pci_disable_device(pci_dev);
6218 	free_netdev(dev);
6219 }
6220 
6221 #ifdef CONFIG_PM_SLEEP
nv_suspend(struct device * device)6222 static int nv_suspend(struct device *device)
6223 {
6224 	struct net_device *dev = dev_get_drvdata(device);
6225 	struct fe_priv *np = netdev_priv(dev);
6226 	u8 __iomem *base = get_hwbase(dev);
6227 	int i;
6228 
6229 	if (netif_running(dev)) {
6230 		/* Gross. */
6231 		nv_close(dev);
6232 	}
6233 	netif_device_detach(dev);
6234 
6235 	/* save non-pci configuration space */
6236 	for (i = 0; i <= np->register_size/sizeof(u32); i++)
6237 		np->saved_config_space[i] = readl(base + i*sizeof(u32));
6238 
6239 	return 0;
6240 }
6241 
nv_resume(struct device * device)6242 static int nv_resume(struct device *device)
6243 {
6244 	struct pci_dev *pdev = to_pci_dev(device);
6245 	struct net_device *dev = pci_get_drvdata(pdev);
6246 	struct fe_priv *np = netdev_priv(dev);
6247 	u8 __iomem *base = get_hwbase(dev);
6248 	int i, rc = 0;
6249 
6250 	/* restore non-pci configuration space */
6251 	for (i = 0; i <= np->register_size/sizeof(u32); i++)
6252 		writel(np->saved_config_space[i], base+i*sizeof(u32));
6253 
6254 	if (np->driver_data & DEV_NEED_MSI_FIX)
6255 		pci_write_config_dword(pdev, NV_MSI_PRIV_OFFSET, NV_MSI_PRIV_VALUE);
6256 
6257 	/* restore phy state, including autoneg */
6258 	phy_init(dev);
6259 
6260 	netif_device_attach(dev);
6261 	if (netif_running(dev)) {
6262 		rc = nv_open(dev);
6263 		nv_set_multicast(dev);
6264 	}
6265 	return rc;
6266 }
6267 
6268 static SIMPLE_DEV_PM_OPS(nv_pm_ops, nv_suspend, nv_resume);
6269 #define NV_PM_OPS (&nv_pm_ops)
6270 
6271 #else
6272 #define NV_PM_OPS NULL
6273 #endif /* CONFIG_PM_SLEEP */
6274 
6275 #ifdef CONFIG_PM
nv_shutdown(struct pci_dev * pdev)6276 static void nv_shutdown(struct pci_dev *pdev)
6277 {
6278 	struct net_device *dev = pci_get_drvdata(pdev);
6279 	struct fe_priv *np = netdev_priv(dev);
6280 
6281 	if (netif_running(dev))
6282 		nv_close(dev);
6283 
6284 	/*
6285 	 * Restore the MAC so a kernel started by kexec won't get confused.
6286 	 * If we really go for poweroff, we must not restore the MAC,
6287 	 * otherwise the MAC for WOL will be reversed at least on some boards.
6288 	 */
6289 	if (system_state != SYSTEM_POWER_OFF)
6290 		nv_restore_mac_addr(pdev);
6291 
6292 	pci_disable_device(pdev);
6293 	/*
6294 	 * Apparently it is not possible to reinitialise from D3 hot,
6295 	 * only put the device into D3 if we really go for poweroff.
6296 	 */
6297 	if (system_state == SYSTEM_POWER_OFF) {
6298 		pci_wake_from_d3(pdev, np->wolenabled);
6299 		pci_set_power_state(pdev, PCI_D3hot);
6300 	}
6301 }
6302 #else
6303 #define nv_shutdown NULL
6304 #endif /* CONFIG_PM */
6305 
6306 static const struct pci_device_id pci_tbl[] = {
6307 	{	/* nForce Ethernet Controller */
6308 		PCI_DEVICE(0x10DE, 0x01C3),
6309 		.driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER,
6310 	},
6311 	{	/* nForce2 Ethernet Controller */
6312 		PCI_DEVICE(0x10DE, 0x0066),
6313 		.driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER,
6314 	},
6315 	{	/* nForce3 Ethernet Controller */
6316 		PCI_DEVICE(0x10DE, 0x00D6),
6317 		.driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER,
6318 	},
6319 	{	/* nForce3 Ethernet Controller */
6320 		PCI_DEVICE(0x10DE, 0x0086),
6321 		.driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM,
6322 	},
6323 	{	/* nForce3 Ethernet Controller */
6324 		PCI_DEVICE(0x10DE, 0x008C),
6325 		.driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM,
6326 	},
6327 	{	/* nForce3 Ethernet Controller */
6328 		PCI_DEVICE(0x10DE, 0x00E6),
6329 		.driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM,
6330 	},
6331 	{	/* nForce3 Ethernet Controller */
6332 		PCI_DEVICE(0x10DE, 0x00DF),
6333 		.driver_data = DEV_NEED_TIMERIRQ|DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM,
6334 	},
6335 	{	/* CK804 Ethernet Controller */
6336 		PCI_DEVICE(0x10DE, 0x0056),
6337 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_STATISTICS_V1|DEV_NEED_TX_LIMIT,
6338 	},
6339 	{	/* CK804 Ethernet Controller */
6340 		PCI_DEVICE(0x10DE, 0x0057),
6341 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_STATISTICS_V1|DEV_NEED_TX_LIMIT,
6342 	},
6343 	{	/* MCP04 Ethernet Controller */
6344 		PCI_DEVICE(0x10DE, 0x0037),
6345 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_STATISTICS_V1|DEV_NEED_TX_LIMIT,
6346 	},
6347 	{	/* MCP04 Ethernet Controller */
6348 		PCI_DEVICE(0x10DE, 0x0038),
6349 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_STATISTICS_V1|DEV_NEED_TX_LIMIT,
6350 	},
6351 	{	/* MCP51 Ethernet Controller */
6352 		PCI_DEVICE(0x10DE, 0x0268),
6353 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_STATISTICS_V1|DEV_NEED_LOW_POWER_FIX,
6354 	},
6355 	{	/* MCP51 Ethernet Controller */
6356 		PCI_DEVICE(0x10DE, 0x0269),
6357 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_STATISTICS_V1|DEV_NEED_LOW_POWER_FIX,
6358 	},
6359 	{	/* MCP55 Ethernet Controller */
6360 		PCI_DEVICE(0x10DE, 0x0372),
6361 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_VLAN|DEV_HAS_MSI|DEV_HAS_MSI_X|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_NEED_TX_LIMIT|DEV_NEED_MSI_FIX,
6362 	},
6363 	{	/* MCP55 Ethernet Controller */
6364 		PCI_DEVICE(0x10DE, 0x0373),
6365 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_VLAN|DEV_HAS_MSI|DEV_HAS_MSI_X|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_NEED_TX_LIMIT|DEV_NEED_MSI_FIX,
6366 	},
6367 	{	/* MCP61 Ethernet Controller */
6368 		PCI_DEVICE(0x10DE, 0x03E5),
6369 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_NEED_MSI_FIX,
6370 	},
6371 	{	/* MCP61 Ethernet Controller */
6372 		PCI_DEVICE(0x10DE, 0x03E6),
6373 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_NEED_MSI_FIX,
6374 	},
6375 	{	/* MCP61 Ethernet Controller */
6376 		PCI_DEVICE(0x10DE, 0x03EE),
6377 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_NEED_MSI_FIX,
6378 	},
6379 	{	/* MCP61 Ethernet Controller */
6380 		PCI_DEVICE(0x10DE, 0x03EF),
6381 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_NEED_MSI_FIX,
6382 	},
6383 	{	/* MCP65 Ethernet Controller */
6384 		PCI_DEVICE(0x10DE, 0x0450),
6385 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_NEED_TX_LIMIT|DEV_HAS_GEAR_MODE|DEV_NEED_MSI_FIX,
6386 	},
6387 	{	/* MCP65 Ethernet Controller */
6388 		PCI_DEVICE(0x10DE, 0x0451),
6389 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_NEED_TX_LIMIT|DEV_HAS_GEAR_MODE|DEV_NEED_MSI_FIX,
6390 	},
6391 	{	/* MCP65 Ethernet Controller */
6392 		PCI_DEVICE(0x10DE, 0x0452),
6393 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_NEED_TX_LIMIT|DEV_HAS_GEAR_MODE|DEV_NEED_MSI_FIX,
6394 	},
6395 	{	/* MCP65 Ethernet Controller */
6396 		PCI_DEVICE(0x10DE, 0x0453),
6397 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_NEED_TX_LIMIT|DEV_HAS_GEAR_MODE|DEV_NEED_MSI_FIX,
6398 	},
6399 	{	/* MCP67 Ethernet Controller */
6400 		PCI_DEVICE(0x10DE, 0x054C),
6401 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_HAS_GEAR_MODE|DEV_NEED_MSI_FIX,
6402 	},
6403 	{	/* MCP67 Ethernet Controller */
6404 		PCI_DEVICE(0x10DE, 0x054D),
6405 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_HAS_GEAR_MODE|DEV_NEED_MSI_FIX,
6406 	},
6407 	{	/* MCP67 Ethernet Controller */
6408 		PCI_DEVICE(0x10DE, 0x054E),
6409 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_HAS_GEAR_MODE|DEV_NEED_MSI_FIX,
6410 	},
6411 	{	/* MCP67 Ethernet Controller */
6412 		PCI_DEVICE(0x10DE, 0x054F),
6413 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_HAS_GEAR_MODE|DEV_NEED_MSI_FIX,
6414 	},
6415 	{	/* MCP73 Ethernet Controller */
6416 		PCI_DEVICE(0x10DE, 0x07DC),
6417 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_HAS_COLLISION_FIX|DEV_HAS_GEAR_MODE|DEV_NEED_MSI_FIX,
6418 	},
6419 	{	/* MCP73 Ethernet Controller */
6420 		PCI_DEVICE(0x10DE, 0x07DD),
6421 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_HAS_COLLISION_FIX|DEV_HAS_GEAR_MODE|DEV_NEED_MSI_FIX,
6422 	},
6423 	{	/* MCP73 Ethernet Controller */
6424 		PCI_DEVICE(0x10DE, 0x07DE),
6425 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_HAS_COLLISION_FIX|DEV_HAS_GEAR_MODE|DEV_NEED_MSI_FIX,
6426 	},
6427 	{	/* MCP73 Ethernet Controller */
6428 		PCI_DEVICE(0x10DE, 0x07DF),
6429 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_HIGH_DMA|DEV_HAS_POWER_CNTRL|DEV_HAS_MSI|DEV_HAS_PAUSEFRAME_TX_V1|DEV_HAS_STATISTICS_V12|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_HAS_COLLISION_FIX|DEV_HAS_GEAR_MODE|DEV_NEED_MSI_FIX,
6430 	},
6431 	{	/* MCP77 Ethernet Controller */
6432 		PCI_DEVICE(0x10DE, 0x0760),
6433 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_MSI|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX_V2|DEV_HAS_STATISTICS_V123|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_HAS_COLLISION_FIX|DEV_NEED_TX_LIMIT2|DEV_HAS_GEAR_MODE|DEV_NEED_PHY_INIT_FIX|DEV_NEED_MSI_FIX,
6434 	},
6435 	{	/* MCP77 Ethernet Controller */
6436 		PCI_DEVICE(0x10DE, 0x0761),
6437 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_MSI|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX_V2|DEV_HAS_STATISTICS_V123|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_HAS_COLLISION_FIX|DEV_NEED_TX_LIMIT2|DEV_HAS_GEAR_MODE|DEV_NEED_PHY_INIT_FIX|DEV_NEED_MSI_FIX,
6438 	},
6439 	{	/* MCP77 Ethernet Controller */
6440 		PCI_DEVICE(0x10DE, 0x0762),
6441 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_MSI|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX_V2|DEV_HAS_STATISTICS_V123|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_HAS_COLLISION_FIX|DEV_NEED_TX_LIMIT2|DEV_HAS_GEAR_MODE|DEV_NEED_PHY_INIT_FIX|DEV_NEED_MSI_FIX,
6442 	},
6443 	{	/* MCP77 Ethernet Controller */
6444 		PCI_DEVICE(0x10DE, 0x0763),
6445 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_MSI|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX_V2|DEV_HAS_STATISTICS_V123|DEV_HAS_TEST_EXTENDED|DEV_HAS_MGMT_UNIT|DEV_HAS_CORRECT_MACADDR|DEV_HAS_COLLISION_FIX|DEV_NEED_TX_LIMIT2|DEV_HAS_GEAR_MODE|DEV_NEED_PHY_INIT_FIX|DEV_NEED_MSI_FIX,
6446 	},
6447 	{	/* MCP79 Ethernet Controller */
6448 		PCI_DEVICE(0x10DE, 0x0AB0),
6449 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_MSI|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX_V3|DEV_HAS_STATISTICS_V123|DEV_HAS_TEST_EXTENDED|DEV_HAS_CORRECT_MACADDR|DEV_HAS_COLLISION_FIX|DEV_NEED_TX_LIMIT2|DEV_HAS_GEAR_MODE|DEV_NEED_PHY_INIT_FIX|DEV_NEED_MSI_FIX,
6450 	},
6451 	{	/* MCP79 Ethernet Controller */
6452 		PCI_DEVICE(0x10DE, 0x0AB1),
6453 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_MSI|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX_V3|DEV_HAS_STATISTICS_V123|DEV_HAS_TEST_EXTENDED|DEV_HAS_CORRECT_MACADDR|DEV_HAS_COLLISION_FIX|DEV_NEED_TX_LIMIT2|DEV_HAS_GEAR_MODE|DEV_NEED_PHY_INIT_FIX|DEV_NEED_MSI_FIX,
6454 	},
6455 	{	/* MCP79 Ethernet Controller */
6456 		PCI_DEVICE(0x10DE, 0x0AB2),
6457 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_MSI|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX_V3|DEV_HAS_STATISTICS_V123|DEV_HAS_TEST_EXTENDED|DEV_HAS_CORRECT_MACADDR|DEV_HAS_COLLISION_FIX|DEV_NEED_TX_LIMIT2|DEV_HAS_GEAR_MODE|DEV_NEED_PHY_INIT_FIX|DEV_NEED_MSI_FIX,
6458 	},
6459 	{	/* MCP79 Ethernet Controller */
6460 		PCI_DEVICE(0x10DE, 0x0AB3),
6461 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_MSI|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX_V3|DEV_HAS_STATISTICS_V123|DEV_HAS_TEST_EXTENDED|DEV_HAS_CORRECT_MACADDR|DEV_HAS_COLLISION_FIX|DEV_NEED_TX_LIMIT2|DEV_HAS_GEAR_MODE|DEV_NEED_PHY_INIT_FIX|DEV_NEED_MSI_FIX,
6462 	},
6463 	{	/* MCP89 Ethernet Controller */
6464 		PCI_DEVICE(0x10DE, 0x0D7D),
6465 		.driver_data = DEV_NEED_LINKTIMER|DEV_HAS_LARGEDESC|DEV_HAS_CHECKSUM|DEV_HAS_HIGH_DMA|DEV_HAS_MSI|DEV_HAS_POWER_CNTRL|DEV_HAS_PAUSEFRAME_TX_V3|DEV_HAS_STATISTICS_V123|DEV_HAS_TEST_EXTENDED|DEV_HAS_CORRECT_MACADDR|DEV_HAS_COLLISION_FIX|DEV_HAS_GEAR_MODE|DEV_NEED_PHY_INIT_FIX,
6466 	},
6467 	{0,},
6468 };
6469 
6470 static struct pci_driver forcedeth_pci_driver = {
6471 	.name		= DRV_NAME,
6472 	.id_table	= pci_tbl,
6473 	.probe		= nv_probe,
6474 	.remove		= nv_remove,
6475 	.shutdown	= nv_shutdown,
6476 	.driver.pm	= NV_PM_OPS,
6477 };
6478 
6479 module_param(max_interrupt_work, int, 0);
6480 MODULE_PARM_DESC(max_interrupt_work, "forcedeth maximum events handled per interrupt");
6481 module_param(optimization_mode, int, 0);
6482 MODULE_PARM_DESC(optimization_mode, "In throughput mode (0), every tx & rx packet will generate an interrupt. In CPU mode (1), interrupts are controlled by a timer. In dynamic mode (2), the mode toggles between throughput and CPU mode based on network load.");
6483 module_param(poll_interval, int, 0);
6484 MODULE_PARM_DESC(poll_interval, "Interval determines how frequent timer interrupt is generated by [(time_in_micro_secs * 100) / (2^10)]. Min is 0 and Max is 65535.");
6485 module_param(msi, int, 0);
6486 MODULE_PARM_DESC(msi, "MSI interrupts are enabled by setting to 1 and disabled by setting to 0.");
6487 module_param(msix, int, 0);
6488 MODULE_PARM_DESC(msix, "MSIX interrupts are enabled by setting to 1 and disabled by setting to 0.");
6489 module_param(dma_64bit, int, 0);
6490 MODULE_PARM_DESC(dma_64bit, "High DMA is enabled by setting to 1 and disabled by setting to 0.");
6491 module_param(phy_cross, int, 0);
6492 MODULE_PARM_DESC(phy_cross, "Phy crossover detection for Realtek 8201 phy is enabled by setting to 1 and disabled by setting to 0.");
6493 module_param(phy_power_down, int, 0);
6494 MODULE_PARM_DESC(phy_power_down, "Power down phy and disable link when interface is down (1), or leave phy powered up (0).");
6495 module_param(debug_tx_timeout, bool, 0);
6496 MODULE_PARM_DESC(debug_tx_timeout,
6497 		 "Dump tx related registers and ring when tx_timeout happens");
6498 
6499 module_pci_driver(forcedeth_pci_driver);
6500 MODULE_AUTHOR("Manfred Spraul <manfred@colorfullife.com>");
6501 MODULE_DESCRIPTION("Reverse Engineered nForce ethernet driver");
6502 MODULE_LICENSE("GPL");
6503 MODULE_DEVICE_TABLE(pci, pci_tbl);
6504