1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-or-later
2 /*
3 * Copyright 2008 - 2015 Freescale Semiconductor Inc.
4 */
5
6 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
7
8 #include "fman_dtsec.h"
9 #include "fman.h"
10 #include "mac.h"
11
12 #include <linux/slab.h>
13 #include <linux/bitrev.h>
14 #include <linux/io.h>
15 #include <linux/delay.h>
16 #include <linux/phy.h>
17 #include <linux/crc32.h>
18 #include <linux/of_mdio.h>
19 #include <linux/mii.h>
20 #include <linux/netdevice.h>
21
22 /* TBI register addresses */
23 #define MII_TBICON 0x11
24
25 /* TBICON register bit fields */
26 #define TBICON_SOFT_RESET 0x8000 /* Soft reset */
27 #define TBICON_DISABLE_RX_DIS 0x2000 /* Disable receive disparity */
28 #define TBICON_DISABLE_TX_DIS 0x1000 /* Disable transmit disparity */
29 #define TBICON_AN_SENSE 0x0100 /* Auto-negotiation sense enable */
30 #define TBICON_CLK_SELECT 0x0020 /* Clock select */
31 #define TBICON_MI_MODE 0x0010 /* GMII mode (TBI if not set) */
32
33 /* Interrupt Mask Register (IMASK) */
34 #define DTSEC_IMASK_BREN 0x80000000
35 #define DTSEC_IMASK_RXCEN 0x40000000
36 #define DTSEC_IMASK_MSROEN 0x04000000
37 #define DTSEC_IMASK_GTSCEN 0x02000000
38 #define DTSEC_IMASK_BTEN 0x01000000
39 #define DTSEC_IMASK_TXCEN 0x00800000
40 #define DTSEC_IMASK_TXEEN 0x00400000
41 #define DTSEC_IMASK_LCEN 0x00040000
42 #define DTSEC_IMASK_CRLEN 0x00020000
43 #define DTSEC_IMASK_XFUNEN 0x00010000
44 #define DTSEC_IMASK_ABRTEN 0x00008000
45 #define DTSEC_IMASK_IFERREN 0x00004000
46 #define DTSEC_IMASK_MAGEN 0x00000800
47 #define DTSEC_IMASK_MMRDEN 0x00000400
48 #define DTSEC_IMASK_MMWREN 0x00000200
49 #define DTSEC_IMASK_GRSCEN 0x00000100
50 #define DTSEC_IMASK_TDPEEN 0x00000002
51 #define DTSEC_IMASK_RDPEEN 0x00000001
52
53 #define DTSEC_EVENTS_MASK \
54 ((u32)(DTSEC_IMASK_BREN | \
55 DTSEC_IMASK_RXCEN | \
56 DTSEC_IMASK_BTEN | \
57 DTSEC_IMASK_TXCEN | \
58 DTSEC_IMASK_TXEEN | \
59 DTSEC_IMASK_ABRTEN | \
60 DTSEC_IMASK_LCEN | \
61 DTSEC_IMASK_CRLEN | \
62 DTSEC_IMASK_XFUNEN | \
63 DTSEC_IMASK_IFERREN | \
64 DTSEC_IMASK_MAGEN | \
65 DTSEC_IMASK_TDPEEN | \
66 DTSEC_IMASK_RDPEEN))
67
68 /* dtsec timestamp event bits */
69 #define TMR_PEMASK_TSREEN 0x00010000
70 #define TMR_PEVENT_TSRE 0x00010000
71
72 /* Group address bit indication */
73 #define MAC_GROUP_ADDRESS 0x0000010000000000ULL
74
75 /* Defaults */
76 #define DEFAULT_HALFDUP_RETRANSMIT 0xf
77 #define DEFAULT_HALFDUP_COLL_WINDOW 0x37
78 #define DEFAULT_TX_PAUSE_TIME 0xf000
79 #define DEFAULT_RX_PREPEND 0
80 #define DEFAULT_PREAMBLE_LEN 7
81 #define DEFAULT_TX_PAUSE_TIME_EXTD 0
82 #define DEFAULT_NON_BACK_TO_BACK_IPG1 0x40
83 #define DEFAULT_NON_BACK_TO_BACK_IPG2 0x60
84 #define DEFAULT_MIN_IFG_ENFORCEMENT 0x50
85 #define DEFAULT_BACK_TO_BACK_IPG 0x60
86 #define DEFAULT_MAXIMUM_FRAME 0x600
87
88 /* register related defines (bits, field offsets..) */
89 #define DTSEC_ID2_INT_REDUCED_OFF 0x00010000
90
91 #define DTSEC_ECNTRL_GMIIM 0x00000040
92 #define DTSEC_ECNTRL_TBIM 0x00000020
93 #define DTSEC_ECNTRL_RPM 0x00000010
94 #define DTSEC_ECNTRL_R100M 0x00000008
95 #define DTSEC_ECNTRL_RMM 0x00000004
96 #define DTSEC_ECNTRL_SGMIIM 0x00000002
97 #define DTSEC_ECNTRL_QSGMIIM 0x00000001
98
99 #define TCTRL_TTSE 0x00000040
100 #define TCTRL_GTS 0x00000020
101
102 #define RCTRL_PAL_MASK 0x001f0000
103 #define RCTRL_PAL_SHIFT 16
104 #define RCTRL_GHTX 0x00000400
105 #define RCTRL_RTSE 0x00000040
106 #define RCTRL_GRS 0x00000020
107 #define RCTRL_MPROM 0x00000008
108 #define RCTRL_RSF 0x00000004
109 #define RCTRL_UPROM 0x00000001
110
111 #define MACCFG1_SOFT_RESET 0x80000000
112 #define MACCFG1_RX_FLOW 0x00000020
113 #define MACCFG1_TX_FLOW 0x00000010
114 #define MACCFG1_TX_EN 0x00000001
115 #define MACCFG1_RX_EN 0x00000004
116
117 #define MACCFG2_NIBBLE_MODE 0x00000100
118 #define MACCFG2_BYTE_MODE 0x00000200
119 #define MACCFG2_PAD_CRC_EN 0x00000004
120 #define MACCFG2_FULL_DUPLEX 0x00000001
121 #define MACCFG2_PREAMBLE_LENGTH_MASK 0x0000f000
122 #define MACCFG2_PREAMBLE_LENGTH_SHIFT 12
123
124 #define IPGIFG_NON_BACK_TO_BACK_IPG_1_SHIFT 24
125 #define IPGIFG_NON_BACK_TO_BACK_IPG_2_SHIFT 16
126 #define IPGIFG_MIN_IFG_ENFORCEMENT_SHIFT 8
127
128 #define IPGIFG_NON_BACK_TO_BACK_IPG_1 0x7F000000
129 #define IPGIFG_NON_BACK_TO_BACK_IPG_2 0x007F0000
130 #define IPGIFG_MIN_IFG_ENFORCEMENT 0x0000FF00
131 #define IPGIFG_BACK_TO_BACK_IPG 0x0000007F
132
133 #define HAFDUP_EXCESS_DEFER 0x00010000
134 #define HAFDUP_COLLISION_WINDOW 0x000003ff
135 #define HAFDUP_RETRANSMISSION_MAX_SHIFT 12
136 #define HAFDUP_RETRANSMISSION_MAX 0x0000f000
137
138 #define NUM_OF_HASH_REGS 8 /* Number of hash table registers */
139
140 #define PTV_PTE_MASK 0xffff0000
141 #define PTV_PT_MASK 0x0000ffff
142 #define PTV_PTE_SHIFT 16
143
144 #define MAX_PACKET_ALIGNMENT 31
145 #define MAX_INTER_PACKET_GAP 0x7f
146 #define MAX_RETRANSMISSION 0x0f
147 #define MAX_COLLISION_WINDOW 0x03ff
148
149 /* Hash table size (32 bits*8 regs) */
150 #define DTSEC_HASH_TABLE_SIZE 256
151 /* Extended Hash table size (32 bits*16 regs) */
152 #define EXTENDED_HASH_TABLE_SIZE 512
153
154 /* dTSEC Memory Map registers */
155 struct dtsec_regs {
156 /* dTSEC General Control and Status Registers */
157 u32 tsec_id; /* 0x000 ETSEC_ID register */
158 u32 tsec_id2; /* 0x004 ETSEC_ID2 register */
159 u32 ievent; /* 0x008 Interrupt event register */
160 u32 imask; /* 0x00C Interrupt mask register */
161 u32 reserved0010[1];
162 u32 ecntrl; /* 0x014 E control register */
163 u32 ptv; /* 0x018 Pause time value register */
164 u32 tbipa; /* 0x01C TBI PHY address register */
165 u32 tmr_ctrl; /* 0x020 Time-stamp Control register */
166 u32 tmr_pevent; /* 0x024 Time-stamp event register */
167 u32 tmr_pemask; /* 0x028 Timer event mask register */
168 u32 reserved002c[5];
169 u32 tctrl; /* 0x040 Transmit control register */
170 u32 reserved0044[3];
171 u32 rctrl; /* 0x050 Receive control register */
172 u32 reserved0054[11];
173 u32 igaddr[8]; /* 0x080-0x09C Individual/group address */
174 u32 gaddr[8]; /* 0x0A0-0x0BC Group address registers 0-7 */
175 u32 reserved00c0[16];
176 u32 maccfg1; /* 0x100 MAC configuration #1 */
177 u32 maccfg2; /* 0x104 MAC configuration #2 */
178 u32 ipgifg; /* 0x108 IPG/IFG */
179 u32 hafdup; /* 0x10C Half-duplex */
180 u32 maxfrm; /* 0x110 Maximum frame */
181 u32 reserved0114[10];
182 u32 ifstat; /* 0x13C Interface status */
183 u32 macstnaddr1; /* 0x140 Station Address,part 1 */
184 u32 macstnaddr2; /* 0x144 Station Address,part 2 */
185 struct {
186 u32 exact_match1; /* octets 1-4 */
187 u32 exact_match2; /* octets 5-6 */
188 } macaddr[15]; /* 0x148-0x1BC mac exact match addresses 1-15 */
189 u32 reserved01c0[16];
190 u32 tr64; /* 0x200 Tx and Rx 64 byte frame counter */
191 u32 tr127; /* 0x204 Tx and Rx 65 to 127 byte frame counter */
192 u32 tr255; /* 0x208 Tx and Rx 128 to 255 byte frame counter */
193 u32 tr511; /* 0x20C Tx and Rx 256 to 511 byte frame counter */
194 u32 tr1k; /* 0x210 Tx and Rx 512 to 1023 byte frame counter */
195 u32 trmax; /* 0x214 Tx and Rx 1024 to 1518 byte frame counter */
196 u32 trmgv;
197 /* 0x218 Tx and Rx 1519 to 1522 byte good VLAN frame count */
198 u32 rbyt; /* 0x21C receive byte counter */
199 u32 rpkt; /* 0x220 receive packet counter */
200 u32 rfcs; /* 0x224 receive FCS error counter */
201 u32 rmca; /* 0x228 RMCA Rx multicast packet counter */
202 u32 rbca; /* 0x22C Rx broadcast packet counter */
203 u32 rxcf; /* 0x230 Rx control frame packet counter */
204 u32 rxpf; /* 0x234 Rx pause frame packet counter */
205 u32 rxuo; /* 0x238 Rx unknown OP code counter */
206 u32 raln; /* 0x23C Rx alignment error counter */
207 u32 rflr; /* 0x240 Rx frame length error counter */
208 u32 rcde; /* 0x244 Rx code error counter */
209 u32 rcse; /* 0x248 Rx carrier sense error counter */
210 u32 rund; /* 0x24C Rx undersize packet counter */
211 u32 rovr; /* 0x250 Rx oversize packet counter */
212 u32 rfrg; /* 0x254 Rx fragments counter */
213 u32 rjbr; /* 0x258 Rx jabber counter */
214 u32 rdrp; /* 0x25C Rx drop */
215 u32 tbyt; /* 0x260 Tx byte counter */
216 u32 tpkt; /* 0x264 Tx packet counter */
217 u32 tmca; /* 0x268 Tx multicast packet counter */
218 u32 tbca; /* 0x26C Tx broadcast packet counter */
219 u32 txpf; /* 0x270 Tx pause control frame counter */
220 u32 tdfr; /* 0x274 Tx deferral packet counter */
221 u32 tedf; /* 0x278 Tx excessive deferral packet counter */
222 u32 tscl; /* 0x27C Tx single collision packet counter */
223 u32 tmcl; /* 0x280 Tx multiple collision packet counter */
224 u32 tlcl; /* 0x284 Tx late collision packet counter */
225 u32 txcl; /* 0x288 Tx excessive collision packet counter */
226 u32 tncl; /* 0x28C Tx total collision counter */
227 u32 reserved0290[1];
228 u32 tdrp; /* 0x294 Tx drop frame counter */
229 u32 tjbr; /* 0x298 Tx jabber frame counter */
230 u32 tfcs; /* 0x29C Tx FCS error counter */
231 u32 txcf; /* 0x2A0 Tx control frame counter */
232 u32 tovr; /* 0x2A4 Tx oversize frame counter */
233 u32 tund; /* 0x2A8 Tx undersize frame counter */
234 u32 tfrg; /* 0x2AC Tx fragments frame counter */
235 u32 car1; /* 0x2B0 carry register one register* */
236 u32 car2; /* 0x2B4 carry register two register* */
237 u32 cam1; /* 0x2B8 carry register one mask register */
238 u32 cam2; /* 0x2BC carry register two mask register */
239 u32 reserved02c0[848];
240 };
241
242 /* struct dtsec_cfg - dTSEC configuration
243 * Transmit half-duplex flow control, under software control for 10/100-Mbps
244 * half-duplex media. If set, back pressure is applied to media by raising
245 * carrier.
246 * halfdup_retransmit:
247 * Number of retransmission attempts following a collision.
248 * If this is exceeded dTSEC aborts transmission due to excessive collisions.
249 * The standard specifies the attempt limit to be 15.
250 * halfdup_coll_window:
251 * The number of bytes of the frame during which collisions may occur.
252 * The default value of 55 corresponds to the frame byte at the end of the
253 * standard 512-bit slot time window. If collisions are detected after this
254 * byte, the late collision event is asserted and transmission of current
255 * frame is aborted.
256 * tx_pad_crc:
257 * Pad and append CRC. If set, the MAC pads all ransmitted short frames and
258 * appends a CRC to every frame regardless of padding requirement.
259 * tx_pause_time:
260 * Transmit pause time value. This pause value is used as part of the pause
261 * frame to be sent when a transmit pause frame is initiated.
262 * If set to 0 this disables transmission of pause frames.
263 * preamble_len:
264 * Length, in bytes, of the preamble field preceding each Ethernet
265 * start-of-frame delimiter byte. The default value of 0x7 should be used in
266 * order to guarantee reliable operation with IEEE 802.3 compliant hardware.
267 * rx_prepend:
268 * Packet alignment padding length. The specified number of bytes (1-31)
269 * of zero padding are inserted before the start of each received frame.
270 * For Ethernet, where optional preamble extraction is enabled, the padding
271 * appears before the preamble, otherwise the padding precedes the
272 * layer 2 header.
273 *
274 * This structure contains basic dTSEC configuration and must be passed to
275 * init() function. A default set of configuration values can be
276 * obtained by calling set_dflts().
277 */
278 struct dtsec_cfg {
279 u16 halfdup_retransmit;
280 u16 halfdup_coll_window;
281 bool tx_pad_crc;
282 u16 tx_pause_time;
283 bool ptp_tsu_en;
284 bool ptp_exception_en;
285 u32 preamble_len;
286 u32 rx_prepend;
287 u16 tx_pause_time_extd;
288 u16 maximum_frame;
289 u32 non_back_to_back_ipg1;
290 u32 non_back_to_back_ipg2;
291 u32 min_ifg_enforcement;
292 u32 back_to_back_ipg;
293 };
294
295 struct fman_mac {
296 /* pointer to dTSEC memory mapped registers */
297 struct dtsec_regs __iomem *regs;
298 /* MAC address of device */
299 u64 addr;
300 /* Ethernet physical interface */
301 phy_interface_t phy_if;
302 u16 max_speed;
303 struct mac_device *dev_id; /* device cookie used by the exception cbs */
304 fman_mac_exception_cb *exception_cb;
305 fman_mac_exception_cb *event_cb;
306 /* Number of individual addresses in registers for this station */
307 u8 num_of_ind_addr_in_regs;
308 /* pointer to driver's global address hash table */
309 struct eth_hash_t *multicast_addr_hash;
310 /* pointer to driver's individual address hash table */
311 struct eth_hash_t *unicast_addr_hash;
312 u8 mac_id;
313 u32 exceptions;
314 bool ptp_tsu_enabled;
315 bool en_tsu_err_exception;
316 struct dtsec_cfg *dtsec_drv_param;
317 void *fm;
318 struct fman_rev_info fm_rev_info;
319 bool basex_if;
320 struct mdio_device *tbidev;
321 struct phylink_pcs pcs;
322 };
323
set_dflts(struct dtsec_cfg * cfg)324 static void set_dflts(struct dtsec_cfg *cfg)
325 {
326 cfg->halfdup_retransmit = DEFAULT_HALFDUP_RETRANSMIT;
327 cfg->halfdup_coll_window = DEFAULT_HALFDUP_COLL_WINDOW;
328 cfg->tx_pad_crc = true;
329 cfg->tx_pause_time = DEFAULT_TX_PAUSE_TIME;
330 /* PHY address 0 is reserved (DPAA RM) */
331 cfg->rx_prepend = DEFAULT_RX_PREPEND;
332 cfg->ptp_tsu_en = true;
333 cfg->ptp_exception_en = true;
334 cfg->preamble_len = DEFAULT_PREAMBLE_LEN;
335 cfg->tx_pause_time_extd = DEFAULT_TX_PAUSE_TIME_EXTD;
336 cfg->non_back_to_back_ipg1 = DEFAULT_NON_BACK_TO_BACK_IPG1;
337 cfg->non_back_to_back_ipg2 = DEFAULT_NON_BACK_TO_BACK_IPG2;
338 cfg->min_ifg_enforcement = DEFAULT_MIN_IFG_ENFORCEMENT;
339 cfg->back_to_back_ipg = DEFAULT_BACK_TO_BACK_IPG;
340 cfg->maximum_frame = DEFAULT_MAXIMUM_FRAME;
341 }
342
set_mac_address(struct dtsec_regs __iomem * regs,const u8 * adr)343 static void set_mac_address(struct dtsec_regs __iomem *regs, const u8 *adr)
344 {
345 u32 tmp;
346
347 tmp = (u32)((adr[5] << 24) |
348 (adr[4] << 16) | (adr[3] << 8) | adr[2]);
349 iowrite32be(tmp, ®s->macstnaddr1);
350
351 tmp = (u32)((adr[1] << 24) | (adr[0] << 16));
352 iowrite32be(tmp, ®s->macstnaddr2);
353 }
354
init(struct dtsec_regs __iomem * regs,struct dtsec_cfg * cfg,phy_interface_t iface,u16 iface_speed,u64 addr,u32 exception_mask,u8 tbi_addr)355 static int init(struct dtsec_regs __iomem *regs, struct dtsec_cfg *cfg,
356 phy_interface_t iface, u16 iface_speed, u64 addr,
357 u32 exception_mask, u8 tbi_addr)
358 {
359 enet_addr_t eth_addr;
360 u32 tmp = 0;
361 int i;
362
363 /* Soft reset */
364 iowrite32be(MACCFG1_SOFT_RESET, ®s->maccfg1);
365 iowrite32be(0, ®s->maccfg1);
366
367 if (cfg->tx_pause_time)
368 tmp |= cfg->tx_pause_time;
369 if (cfg->tx_pause_time_extd)
370 tmp |= cfg->tx_pause_time_extd << PTV_PTE_SHIFT;
371 iowrite32be(tmp, ®s->ptv);
372
373 tmp = 0;
374 tmp |= (cfg->rx_prepend << RCTRL_PAL_SHIFT) & RCTRL_PAL_MASK;
375 /* Accept short frames */
376 tmp |= RCTRL_RSF;
377
378 iowrite32be(tmp, ®s->rctrl);
379
380 /* Assign a Phy Address to the TBI (TBIPA).
381 * Done also in cases where TBI is not selected to avoid conflict with
382 * the external PHY's Physical address
383 */
384 iowrite32be(tbi_addr, ®s->tbipa);
385
386 iowrite32be(0, ®s->tmr_ctrl);
387
388 if (cfg->ptp_tsu_en) {
389 tmp = 0;
390 tmp |= TMR_PEVENT_TSRE;
391 iowrite32be(tmp, ®s->tmr_pevent);
392
393 if (cfg->ptp_exception_en) {
394 tmp = 0;
395 tmp |= TMR_PEMASK_TSREEN;
396 iowrite32be(tmp, ®s->tmr_pemask);
397 }
398 }
399
400 tmp = 0;
401 tmp |= MACCFG1_RX_FLOW;
402 tmp |= MACCFG1_TX_FLOW;
403 iowrite32be(tmp, ®s->maccfg1);
404
405 tmp = 0;
406
407 tmp |= (cfg->preamble_len << MACCFG2_PREAMBLE_LENGTH_SHIFT) &
408 MACCFG2_PREAMBLE_LENGTH_MASK;
409 if (cfg->tx_pad_crc)
410 tmp |= MACCFG2_PAD_CRC_EN;
411 iowrite32be(tmp, ®s->maccfg2);
412
413 tmp = (((cfg->non_back_to_back_ipg1 <<
414 IPGIFG_NON_BACK_TO_BACK_IPG_1_SHIFT)
415 & IPGIFG_NON_BACK_TO_BACK_IPG_1)
416 | ((cfg->non_back_to_back_ipg2 <<
417 IPGIFG_NON_BACK_TO_BACK_IPG_2_SHIFT)
418 & IPGIFG_NON_BACK_TO_BACK_IPG_2)
419 | ((cfg->min_ifg_enforcement << IPGIFG_MIN_IFG_ENFORCEMENT_SHIFT)
420 & IPGIFG_MIN_IFG_ENFORCEMENT)
421 | (cfg->back_to_back_ipg & IPGIFG_BACK_TO_BACK_IPG));
422 iowrite32be(tmp, ®s->ipgifg);
423
424 tmp = 0;
425 tmp |= HAFDUP_EXCESS_DEFER;
426 tmp |= ((cfg->halfdup_retransmit << HAFDUP_RETRANSMISSION_MAX_SHIFT)
427 & HAFDUP_RETRANSMISSION_MAX);
428 tmp |= (cfg->halfdup_coll_window & HAFDUP_COLLISION_WINDOW);
429
430 iowrite32be(tmp, ®s->hafdup);
431
432 /* Initialize Maximum frame length */
433 iowrite32be(cfg->maximum_frame, ®s->maxfrm);
434
435 iowrite32be(0xffffffff, ®s->cam1);
436 iowrite32be(0xffffffff, ®s->cam2);
437
438 iowrite32be(exception_mask, ®s->imask);
439
440 iowrite32be(0xffffffff, ®s->ievent);
441
442 if (addr) {
443 MAKE_ENET_ADDR_FROM_UINT64(addr, eth_addr);
444 set_mac_address(regs, (const u8 *)eth_addr);
445 }
446
447 /* HASH */
448 for (i = 0; i < NUM_OF_HASH_REGS; i++) {
449 /* Initialize IADDRx */
450 iowrite32be(0, ®s->igaddr[i]);
451 /* Initialize GADDRx */
452 iowrite32be(0, ®s->gaddr[i]);
453 }
454
455 return 0;
456 }
457
set_bucket(struct dtsec_regs __iomem * regs,int bucket,bool enable)458 static void set_bucket(struct dtsec_regs __iomem *regs, int bucket,
459 bool enable)
460 {
461 int reg_idx = (bucket >> 5) & 0xf;
462 int bit_idx = bucket & 0x1f;
463 u32 bit_mask = 0x80000000 >> bit_idx;
464 u32 __iomem *reg;
465
466 if (reg_idx > 7)
467 reg = ®s->gaddr[reg_idx - 8];
468 else
469 reg = ®s->igaddr[reg_idx];
470
471 if (enable)
472 iowrite32be(ioread32be(reg) | bit_mask, reg);
473 else
474 iowrite32be(ioread32be(reg) & (~bit_mask), reg);
475 }
476
check_init_parameters(struct fman_mac * dtsec)477 static int check_init_parameters(struct fman_mac *dtsec)
478 {
479 if ((dtsec->dtsec_drv_param)->rx_prepend >
480 MAX_PACKET_ALIGNMENT) {
481 pr_err("packetAlignmentPadding can't be > than %d\n",
482 MAX_PACKET_ALIGNMENT);
483 return -EINVAL;
484 }
485 if (((dtsec->dtsec_drv_param)->non_back_to_back_ipg1 >
486 MAX_INTER_PACKET_GAP) ||
487 ((dtsec->dtsec_drv_param)->non_back_to_back_ipg2 >
488 MAX_INTER_PACKET_GAP) ||
489 ((dtsec->dtsec_drv_param)->back_to_back_ipg >
490 MAX_INTER_PACKET_GAP)) {
491 pr_err("Inter packet gap can't be greater than %d\n",
492 MAX_INTER_PACKET_GAP);
493 return -EINVAL;
494 }
495 if ((dtsec->dtsec_drv_param)->halfdup_retransmit >
496 MAX_RETRANSMISSION) {
497 pr_err("maxRetransmission can't be greater than %d\n",
498 MAX_RETRANSMISSION);
499 return -EINVAL;
500 }
501 if ((dtsec->dtsec_drv_param)->halfdup_coll_window >
502 MAX_COLLISION_WINDOW) {
503 pr_err("collisionWindow can't be greater than %d\n",
504 MAX_COLLISION_WINDOW);
505 return -EINVAL;
506 /* If Auto negotiation process is disabled, need to set up the PHY
507 * using the MII Management Interface
508 */
509 }
510 if (!dtsec->exception_cb) {
511 pr_err("uninitialized exception_cb\n");
512 return -EINVAL;
513 }
514 if (!dtsec->event_cb) {
515 pr_err("uninitialized event_cb\n");
516 return -EINVAL;
517 }
518
519 return 0;
520 }
521
get_exception_flag(enum fman_mac_exceptions exception)522 static int get_exception_flag(enum fman_mac_exceptions exception)
523 {
524 u32 bit_mask;
525
526 switch (exception) {
527 case FM_MAC_EX_1G_BAB_RX:
528 bit_mask = DTSEC_IMASK_BREN;
529 break;
530 case FM_MAC_EX_1G_RX_CTL:
531 bit_mask = DTSEC_IMASK_RXCEN;
532 break;
533 case FM_MAC_EX_1G_GRATEFUL_TX_STP_COMPLET:
534 bit_mask = DTSEC_IMASK_GTSCEN;
535 break;
536 case FM_MAC_EX_1G_BAB_TX:
537 bit_mask = DTSEC_IMASK_BTEN;
538 break;
539 case FM_MAC_EX_1G_TX_CTL:
540 bit_mask = DTSEC_IMASK_TXCEN;
541 break;
542 case FM_MAC_EX_1G_TX_ERR:
543 bit_mask = DTSEC_IMASK_TXEEN;
544 break;
545 case FM_MAC_EX_1G_LATE_COL:
546 bit_mask = DTSEC_IMASK_LCEN;
547 break;
548 case FM_MAC_EX_1G_COL_RET_LMT:
549 bit_mask = DTSEC_IMASK_CRLEN;
550 break;
551 case FM_MAC_EX_1G_TX_FIFO_UNDRN:
552 bit_mask = DTSEC_IMASK_XFUNEN;
553 break;
554 case FM_MAC_EX_1G_MAG_PCKT:
555 bit_mask = DTSEC_IMASK_MAGEN;
556 break;
557 case FM_MAC_EX_1G_MII_MNG_RD_COMPLET:
558 bit_mask = DTSEC_IMASK_MMRDEN;
559 break;
560 case FM_MAC_EX_1G_MII_MNG_WR_COMPLET:
561 bit_mask = DTSEC_IMASK_MMWREN;
562 break;
563 case FM_MAC_EX_1G_GRATEFUL_RX_STP_COMPLET:
564 bit_mask = DTSEC_IMASK_GRSCEN;
565 break;
566 case FM_MAC_EX_1G_DATA_ERR:
567 bit_mask = DTSEC_IMASK_TDPEEN;
568 break;
569 case FM_MAC_EX_1G_RX_MIB_CNT_OVFL:
570 bit_mask = DTSEC_IMASK_MSROEN;
571 break;
572 default:
573 bit_mask = 0;
574 break;
575 }
576
577 return bit_mask;
578 }
579
dtsec_get_max_frame_length(struct fman_mac * dtsec)580 static u16 dtsec_get_max_frame_length(struct fman_mac *dtsec)
581 {
582 struct dtsec_regs __iomem *regs = dtsec->regs;
583
584 return (u16)ioread32be(®s->maxfrm);
585 }
586
dtsec_isr(void * handle)587 static void dtsec_isr(void *handle)
588 {
589 struct fman_mac *dtsec = (struct fman_mac *)handle;
590 struct dtsec_regs __iomem *regs = dtsec->regs;
591 u32 event;
592
593 /* do not handle MDIO events */
594 event = ioread32be(®s->ievent) &
595 (u32)(~(DTSEC_IMASK_MMRDEN | DTSEC_IMASK_MMWREN));
596
597 event &= ioread32be(®s->imask);
598
599 iowrite32be(event, ®s->ievent);
600
601 if (event & DTSEC_IMASK_BREN)
602 dtsec->exception_cb(dtsec->dev_id, FM_MAC_EX_1G_BAB_RX);
603 if (event & DTSEC_IMASK_RXCEN)
604 dtsec->exception_cb(dtsec->dev_id, FM_MAC_EX_1G_RX_CTL);
605 if (event & DTSEC_IMASK_GTSCEN)
606 dtsec->exception_cb(dtsec->dev_id,
607 FM_MAC_EX_1G_GRATEFUL_TX_STP_COMPLET);
608 if (event & DTSEC_IMASK_BTEN)
609 dtsec->exception_cb(dtsec->dev_id, FM_MAC_EX_1G_BAB_TX);
610 if (event & DTSEC_IMASK_TXCEN)
611 dtsec->exception_cb(dtsec->dev_id, FM_MAC_EX_1G_TX_CTL);
612 if (event & DTSEC_IMASK_TXEEN)
613 dtsec->exception_cb(dtsec->dev_id, FM_MAC_EX_1G_TX_ERR);
614 if (event & DTSEC_IMASK_LCEN)
615 dtsec->exception_cb(dtsec->dev_id, FM_MAC_EX_1G_LATE_COL);
616 if (event & DTSEC_IMASK_CRLEN)
617 dtsec->exception_cb(dtsec->dev_id, FM_MAC_EX_1G_COL_RET_LMT);
618 if (event & DTSEC_IMASK_XFUNEN) {
619 /* FM_TX_LOCKUP_ERRATA_DTSEC6 Errata workaround */
620 /* FIXME: This races with the rest of the driver! */
621 if (dtsec->fm_rev_info.major == 2) {
622 u32 tpkt1, tmp_reg1, tpkt2, tmp_reg2, i;
623 /* a. Write 0x00E0_0C00 to DTSEC_ID
624 * This is a read only register
625 * b. Read and save the value of TPKT
626 */
627 tpkt1 = ioread32be(®s->tpkt);
628
629 /* c. Read the register at dTSEC address offset 0x32C */
630 tmp_reg1 = ioread32be(®s->reserved02c0[27]);
631
632 /* d. Compare bits [9:15] to bits [25:31] of the
633 * register at address offset 0x32C.
634 */
635 if ((tmp_reg1 & 0x007F0000) !=
636 (tmp_reg1 & 0x0000007F)) {
637 /* If they are not equal, save the value of
638 * this register and wait for at least
639 * MAXFRM*16 ns
640 */
641 usleep_range((u32)(min
642 (dtsec_get_max_frame_length(dtsec) *
643 16 / 1000, 1)), (u32)
644 (min(dtsec_get_max_frame_length
645 (dtsec) * 16 / 1000, 1) + 1));
646 }
647
648 /* e. Read and save TPKT again and read the register
649 * at dTSEC address offset 0x32C again
650 */
651 tpkt2 = ioread32be(®s->tpkt);
652 tmp_reg2 = ioread32be(®s->reserved02c0[27]);
653
654 /* f. Compare the value of TPKT saved in step b to
655 * value read in step e. Also compare bits [9:15] of
656 * the register at offset 0x32C saved in step d to the
657 * value of bits [9:15] saved in step e. If the two
658 * registers values are unchanged, then the transmit
659 * portion of the dTSEC controller is locked up and
660 * the user should proceed to the recover sequence.
661 */
662 if ((tpkt1 == tpkt2) && ((tmp_reg1 & 0x007F0000) ==
663 (tmp_reg2 & 0x007F0000))) {
664 /* recover sequence */
665
666 /* a.Write a 1 to RCTRL[GRS] */
667
668 iowrite32be(ioread32be(®s->rctrl) |
669 RCTRL_GRS, ®s->rctrl);
670
671 /* b.Wait until IEVENT[GRSC]=1, or at least
672 * 100 us has elapsed.
673 */
674 for (i = 0; i < 100; i++) {
675 if (ioread32be(®s->ievent) &
676 DTSEC_IMASK_GRSCEN)
677 break;
678 udelay(1);
679 }
680 if (ioread32be(®s->ievent) &
681 DTSEC_IMASK_GRSCEN)
682 iowrite32be(DTSEC_IMASK_GRSCEN,
683 ®s->ievent);
684 else
685 pr_debug("Rx lockup due to Tx lockup\n");
686
687 /* c.Write a 1 to bit n of FM_RSTC
688 * (offset 0x0CC of FPM)
689 */
690 fman_reset_mac(dtsec->fm, dtsec->mac_id);
691
692 /* d.Wait 4 Tx clocks (32 ns) */
693 udelay(1);
694
695 /* e.Write a 0 to bit n of FM_RSTC. */
696 /* cleared by FMAN
697 */
698 }
699 }
700
701 dtsec->exception_cb(dtsec->dev_id, FM_MAC_EX_1G_TX_FIFO_UNDRN);
702 }
703 if (event & DTSEC_IMASK_MAGEN)
704 dtsec->exception_cb(dtsec->dev_id, FM_MAC_EX_1G_MAG_PCKT);
705 if (event & DTSEC_IMASK_GRSCEN)
706 dtsec->exception_cb(dtsec->dev_id,
707 FM_MAC_EX_1G_GRATEFUL_RX_STP_COMPLET);
708 if (event & DTSEC_IMASK_TDPEEN)
709 dtsec->exception_cb(dtsec->dev_id, FM_MAC_EX_1G_DATA_ERR);
710 if (event & DTSEC_IMASK_RDPEEN)
711 dtsec->exception_cb(dtsec->dev_id, FM_MAC_1G_RX_DATA_ERR);
712
713 /* masked interrupts */
714 WARN_ON(event & DTSEC_IMASK_ABRTEN);
715 WARN_ON(event & DTSEC_IMASK_IFERREN);
716 }
717
dtsec_1588_isr(void * handle)718 static void dtsec_1588_isr(void *handle)
719 {
720 struct fman_mac *dtsec = (struct fman_mac *)handle;
721 struct dtsec_regs __iomem *regs = dtsec->regs;
722 u32 event;
723
724 if (dtsec->ptp_tsu_enabled) {
725 event = ioread32be(®s->tmr_pevent);
726 event &= ioread32be(®s->tmr_pemask);
727
728 if (event) {
729 iowrite32be(event, ®s->tmr_pevent);
730 WARN_ON(event & TMR_PEVENT_TSRE);
731 dtsec->exception_cb(dtsec->dev_id,
732 FM_MAC_EX_1G_1588_TS_RX_ERR);
733 }
734 }
735 }
736
free_init_resources(struct fman_mac * dtsec)737 static void free_init_resources(struct fman_mac *dtsec)
738 {
739 fman_unregister_intr(dtsec->fm, FMAN_MOD_MAC, dtsec->mac_id,
740 FMAN_INTR_TYPE_ERR);
741 fman_unregister_intr(dtsec->fm, FMAN_MOD_MAC, dtsec->mac_id,
742 FMAN_INTR_TYPE_NORMAL);
743
744 /* release the driver's group hash table */
745 free_hash_table(dtsec->multicast_addr_hash);
746 dtsec->multicast_addr_hash = NULL;
747
748 /* release the driver's individual hash table */
749 free_hash_table(dtsec->unicast_addr_hash);
750 dtsec->unicast_addr_hash = NULL;
751 }
752
pcs_to_dtsec(struct phylink_pcs * pcs)753 static struct fman_mac *pcs_to_dtsec(struct phylink_pcs *pcs)
754 {
755 return container_of(pcs, struct fman_mac, pcs);
756 }
757
dtsec_pcs_get_state(struct phylink_pcs * pcs,struct phylink_link_state * state)758 static void dtsec_pcs_get_state(struct phylink_pcs *pcs,
759 struct phylink_link_state *state)
760 {
761 struct fman_mac *dtsec = pcs_to_dtsec(pcs);
762
763 phylink_mii_c22_pcs_get_state(dtsec->tbidev, state);
764 }
765
dtsec_pcs_config(struct phylink_pcs * pcs,unsigned int neg_mode,phy_interface_t interface,const unsigned long * advertising,bool permit_pause_to_mac)766 static int dtsec_pcs_config(struct phylink_pcs *pcs, unsigned int neg_mode,
767 phy_interface_t interface,
768 const unsigned long *advertising,
769 bool permit_pause_to_mac)
770 {
771 struct fman_mac *dtsec = pcs_to_dtsec(pcs);
772
773 return phylink_mii_c22_pcs_config(dtsec->tbidev, interface,
774 advertising, neg_mode);
775 }
776
dtsec_pcs_an_restart(struct phylink_pcs * pcs)777 static void dtsec_pcs_an_restart(struct phylink_pcs *pcs)
778 {
779 struct fman_mac *dtsec = pcs_to_dtsec(pcs);
780
781 phylink_mii_c22_pcs_an_restart(dtsec->tbidev);
782 }
783
784 static const struct phylink_pcs_ops dtsec_pcs_ops = {
785 .pcs_get_state = dtsec_pcs_get_state,
786 .pcs_config = dtsec_pcs_config,
787 .pcs_an_restart = dtsec_pcs_an_restart,
788 };
789
graceful_start(struct fman_mac * dtsec)790 static void graceful_start(struct fman_mac *dtsec)
791 {
792 struct dtsec_regs __iomem *regs = dtsec->regs;
793
794 iowrite32be(ioread32be(®s->tctrl) & ~TCTRL_GTS, ®s->tctrl);
795 iowrite32be(ioread32be(®s->rctrl) & ~RCTRL_GRS, ®s->rctrl);
796 }
797
graceful_stop(struct fman_mac * dtsec)798 static void graceful_stop(struct fman_mac *dtsec)
799 {
800 struct dtsec_regs __iomem *regs = dtsec->regs;
801 u32 tmp;
802
803 /* Graceful stop - Assert the graceful Rx stop bit */
804 tmp = ioread32be(®s->rctrl) | RCTRL_GRS;
805 iowrite32be(tmp, ®s->rctrl);
806
807 if (dtsec->fm_rev_info.major == 2) {
808 /* Workaround for dTSEC Errata A002 */
809 usleep_range(100, 200);
810 } else {
811 /* Workaround for dTSEC Errata A004839 */
812 usleep_range(10, 50);
813 }
814
815 /* Graceful stop - Assert the graceful Tx stop bit */
816 if (dtsec->fm_rev_info.major == 2) {
817 /* dTSEC Errata A004: Do not use TCTRL[GTS]=1 */
818 pr_debug("GTS not supported due to DTSEC_A004 Errata.\n");
819 } else {
820 tmp = ioread32be(®s->tctrl) | TCTRL_GTS;
821 iowrite32be(tmp, ®s->tctrl);
822
823 /* Workaround for dTSEC Errata A0012, A0014 */
824 usleep_range(10, 50);
825 }
826 }
827
dtsec_enable(struct fman_mac * dtsec)828 static int dtsec_enable(struct fman_mac *dtsec)
829 {
830 return 0;
831 }
832
dtsec_disable(struct fman_mac * dtsec)833 static void dtsec_disable(struct fman_mac *dtsec)
834 {
835 }
836
dtsec_set_tx_pause_frames(struct fman_mac * dtsec,u8 __maybe_unused priority,u16 pause_time,u16 __maybe_unused thresh_time)837 static int dtsec_set_tx_pause_frames(struct fman_mac *dtsec,
838 u8 __maybe_unused priority,
839 u16 pause_time,
840 u16 __maybe_unused thresh_time)
841 {
842 struct dtsec_regs __iomem *regs = dtsec->regs;
843 u32 ptv = 0;
844
845 if (pause_time) {
846 /* FM_BAD_TX_TS_IN_B_2_B_ERRATA_DTSEC_A003 Errata workaround */
847 if (dtsec->fm_rev_info.major == 2 && pause_time <= 320) {
848 pr_warn("pause-time: %d illegal.Should be > 320\n",
849 pause_time);
850 return -EINVAL;
851 }
852
853 ptv = ioread32be(®s->ptv);
854 ptv &= PTV_PTE_MASK;
855 ptv |= pause_time & PTV_PT_MASK;
856 iowrite32be(ptv, ®s->ptv);
857
858 /* trigger the transmission of a flow-control pause frame */
859 iowrite32be(ioread32be(®s->maccfg1) | MACCFG1_TX_FLOW,
860 ®s->maccfg1);
861 } else
862 iowrite32be(ioread32be(®s->maccfg1) & ~MACCFG1_TX_FLOW,
863 ®s->maccfg1);
864
865 return 0;
866 }
867
dtsec_accept_rx_pause_frames(struct fman_mac * dtsec,bool en)868 static int dtsec_accept_rx_pause_frames(struct fman_mac *dtsec, bool en)
869 {
870 struct dtsec_regs __iomem *regs = dtsec->regs;
871 u32 tmp;
872
873 tmp = ioread32be(®s->maccfg1);
874 if (en)
875 tmp |= MACCFG1_RX_FLOW;
876 else
877 tmp &= ~MACCFG1_RX_FLOW;
878 iowrite32be(tmp, ®s->maccfg1);
879
880 return 0;
881 }
882
dtsec_select_pcs(struct phylink_config * config,phy_interface_t iface)883 static struct phylink_pcs *dtsec_select_pcs(struct phylink_config *config,
884 phy_interface_t iface)
885 {
886 struct fman_mac *dtsec = fman_config_to_mac(config)->fman_mac;
887
888 switch (iface) {
889 case PHY_INTERFACE_MODE_SGMII:
890 case PHY_INTERFACE_MODE_1000BASEX:
891 case PHY_INTERFACE_MODE_2500BASEX:
892 return &dtsec->pcs;
893 default:
894 return NULL;
895 }
896 }
897
dtsec_mac_config(struct phylink_config * config,unsigned int mode,const struct phylink_link_state * state)898 static void dtsec_mac_config(struct phylink_config *config, unsigned int mode,
899 const struct phylink_link_state *state)
900 {
901 struct mac_device *mac_dev = fman_config_to_mac(config);
902 struct dtsec_regs __iomem *regs = mac_dev->fman_mac->regs;
903 u32 tmp;
904
905 switch (state->interface) {
906 case PHY_INTERFACE_MODE_RMII:
907 tmp = DTSEC_ECNTRL_RMM;
908 break;
909 case PHY_INTERFACE_MODE_RGMII:
910 case PHY_INTERFACE_MODE_RGMII_ID:
911 case PHY_INTERFACE_MODE_RGMII_RXID:
912 case PHY_INTERFACE_MODE_RGMII_TXID:
913 tmp = DTSEC_ECNTRL_GMIIM | DTSEC_ECNTRL_RPM;
914 break;
915 case PHY_INTERFACE_MODE_SGMII:
916 case PHY_INTERFACE_MODE_1000BASEX:
917 case PHY_INTERFACE_MODE_2500BASEX:
918 tmp = DTSEC_ECNTRL_TBIM | DTSEC_ECNTRL_SGMIIM;
919 break;
920 default:
921 dev_warn(mac_dev->dev, "cannot configure dTSEC for %s\n",
922 phy_modes(state->interface));
923 return;
924 }
925
926 iowrite32be(tmp, ®s->ecntrl);
927 }
928
dtsec_link_up(struct phylink_config * config,struct phy_device * phy,unsigned int mode,phy_interface_t interface,int speed,int duplex,bool tx_pause,bool rx_pause)929 static void dtsec_link_up(struct phylink_config *config, struct phy_device *phy,
930 unsigned int mode, phy_interface_t interface,
931 int speed, int duplex, bool tx_pause, bool rx_pause)
932 {
933 struct mac_device *mac_dev = fman_config_to_mac(config);
934 struct fman_mac *dtsec = mac_dev->fman_mac;
935 struct dtsec_regs __iomem *regs = dtsec->regs;
936 u16 pause_time = tx_pause ? FSL_FM_PAUSE_TIME_ENABLE :
937 FSL_FM_PAUSE_TIME_DISABLE;
938 u32 tmp;
939
940 dtsec_set_tx_pause_frames(dtsec, 0, pause_time, 0);
941 dtsec_accept_rx_pause_frames(dtsec, rx_pause);
942
943 tmp = ioread32be(®s->ecntrl);
944 if (speed == SPEED_100)
945 tmp |= DTSEC_ECNTRL_R100M;
946 else
947 tmp &= ~DTSEC_ECNTRL_R100M;
948 iowrite32be(tmp, ®s->ecntrl);
949
950 tmp = ioread32be(®s->maccfg2);
951 tmp &= ~(MACCFG2_NIBBLE_MODE | MACCFG2_BYTE_MODE | MACCFG2_FULL_DUPLEX);
952 if (speed >= SPEED_1000)
953 tmp |= MACCFG2_BYTE_MODE;
954 else
955 tmp |= MACCFG2_NIBBLE_MODE;
956
957 if (duplex == DUPLEX_FULL)
958 tmp |= MACCFG2_FULL_DUPLEX;
959
960 iowrite32be(tmp, ®s->maccfg2);
961
962 mac_dev->update_speed(mac_dev, speed);
963
964 /* Enable */
965 tmp = ioread32be(®s->maccfg1);
966 tmp |= MACCFG1_RX_EN | MACCFG1_TX_EN;
967 iowrite32be(tmp, ®s->maccfg1);
968
969 /* Graceful start - clear the graceful Rx/Tx stop bit */
970 graceful_start(dtsec);
971 }
972
dtsec_link_down(struct phylink_config * config,unsigned int mode,phy_interface_t interface)973 static void dtsec_link_down(struct phylink_config *config, unsigned int mode,
974 phy_interface_t interface)
975 {
976 struct fman_mac *dtsec = fman_config_to_mac(config)->fman_mac;
977 struct dtsec_regs __iomem *regs = dtsec->regs;
978 u32 tmp;
979
980 /* Graceful stop - Assert the graceful Rx/Tx stop bit */
981 graceful_stop(dtsec);
982
983 tmp = ioread32be(®s->maccfg1);
984 tmp &= ~(MACCFG1_RX_EN | MACCFG1_TX_EN);
985 iowrite32be(tmp, ®s->maccfg1);
986 }
987
988 static const struct phylink_mac_ops dtsec_mac_ops = {
989 .mac_select_pcs = dtsec_select_pcs,
990 .mac_config = dtsec_mac_config,
991 .mac_link_up = dtsec_link_up,
992 .mac_link_down = dtsec_link_down,
993 };
994
dtsec_modify_mac_address(struct fman_mac * dtsec,const enet_addr_t * enet_addr)995 static int dtsec_modify_mac_address(struct fman_mac *dtsec,
996 const enet_addr_t *enet_addr)
997 {
998 graceful_stop(dtsec);
999
1000 /* Initialize MAC Station Address registers (1 & 2)
1001 * Station address have to be swapped (big endian to little endian
1002 */
1003 dtsec->addr = ENET_ADDR_TO_UINT64(*enet_addr);
1004 set_mac_address(dtsec->regs, (const u8 *)(*enet_addr));
1005
1006 graceful_start(dtsec);
1007
1008 return 0;
1009 }
1010
dtsec_add_hash_mac_address(struct fman_mac * dtsec,enet_addr_t * eth_addr)1011 static int dtsec_add_hash_mac_address(struct fman_mac *dtsec,
1012 enet_addr_t *eth_addr)
1013 {
1014 struct dtsec_regs __iomem *regs = dtsec->regs;
1015 struct eth_hash_entry *hash_entry;
1016 u64 addr;
1017 s32 bucket;
1018 u32 crc = 0xFFFFFFFF;
1019 bool mcast, ghtx;
1020
1021 addr = ENET_ADDR_TO_UINT64(*eth_addr);
1022
1023 ghtx = (bool)((ioread32be(®s->rctrl) & RCTRL_GHTX) ? true : false);
1024 mcast = (bool)((addr & MAC_GROUP_ADDRESS) ? true : false);
1025
1026 /* Cannot handle unicast mac addr when GHTX is on */
1027 if (ghtx && !mcast) {
1028 pr_err("Could not compute hash bucket\n");
1029 return -EINVAL;
1030 }
1031 crc = crc32_le(crc, (u8 *)eth_addr, ETH_ALEN);
1032 crc = bitrev32(crc);
1033
1034 /* considering the 9 highest order bits in crc H[8:0]:
1035 *if ghtx = 0 H[8:6] (highest order 3 bits) identify the hash register
1036 *and H[5:1] (next 5 bits) identify the hash bit
1037 *if ghts = 1 H[8:5] (highest order 4 bits) identify the hash register
1038 *and H[4:0] (next 5 bits) identify the hash bit.
1039 *
1040 *In bucket index output the low 5 bits identify the hash register
1041 *bit, while the higher 4 bits identify the hash register
1042 */
1043
1044 if (ghtx) {
1045 bucket = (s32)((crc >> 23) & 0x1ff);
1046 } else {
1047 bucket = (s32)((crc >> 24) & 0xff);
1048 /* if !ghtx and mcast the bit must be set in gaddr instead of
1049 *igaddr.
1050 */
1051 if (mcast)
1052 bucket += 0x100;
1053 }
1054
1055 set_bucket(dtsec->regs, bucket, true);
1056
1057 /* Create element to be added to the driver hash table */
1058 hash_entry = kmalloc(sizeof(*hash_entry), GFP_ATOMIC);
1059 if (!hash_entry)
1060 return -ENOMEM;
1061 hash_entry->addr = addr;
1062 INIT_LIST_HEAD(&hash_entry->node);
1063
1064 if (addr & MAC_GROUP_ADDRESS)
1065 /* Group Address */
1066 list_add_tail(&hash_entry->node,
1067 &dtsec->multicast_addr_hash->lsts[bucket]);
1068 else
1069 list_add_tail(&hash_entry->node,
1070 &dtsec->unicast_addr_hash->lsts[bucket]);
1071
1072 return 0;
1073 }
1074
dtsec_set_allmulti(struct fman_mac * dtsec,bool enable)1075 static int dtsec_set_allmulti(struct fman_mac *dtsec, bool enable)
1076 {
1077 u32 tmp;
1078 struct dtsec_regs __iomem *regs = dtsec->regs;
1079
1080 tmp = ioread32be(®s->rctrl);
1081 if (enable)
1082 tmp |= RCTRL_MPROM;
1083 else
1084 tmp &= ~RCTRL_MPROM;
1085
1086 iowrite32be(tmp, ®s->rctrl);
1087
1088 return 0;
1089 }
1090
dtsec_set_tstamp(struct fman_mac * dtsec,bool enable)1091 static int dtsec_set_tstamp(struct fman_mac *dtsec, bool enable)
1092 {
1093 struct dtsec_regs __iomem *regs = dtsec->regs;
1094 u32 rctrl, tctrl;
1095
1096 rctrl = ioread32be(®s->rctrl);
1097 tctrl = ioread32be(®s->tctrl);
1098
1099 if (enable) {
1100 rctrl |= RCTRL_RTSE;
1101 tctrl |= TCTRL_TTSE;
1102 } else {
1103 rctrl &= ~RCTRL_RTSE;
1104 tctrl &= ~TCTRL_TTSE;
1105 }
1106
1107 iowrite32be(rctrl, ®s->rctrl);
1108 iowrite32be(tctrl, ®s->tctrl);
1109
1110 return 0;
1111 }
1112
dtsec_del_hash_mac_address(struct fman_mac * dtsec,enet_addr_t * eth_addr)1113 static int dtsec_del_hash_mac_address(struct fman_mac *dtsec,
1114 enet_addr_t *eth_addr)
1115 {
1116 struct dtsec_regs __iomem *regs = dtsec->regs;
1117 struct list_head *pos;
1118 struct eth_hash_entry *hash_entry = NULL;
1119 u64 addr;
1120 s32 bucket;
1121 u32 crc = 0xFFFFFFFF;
1122 bool mcast, ghtx;
1123
1124 addr = ENET_ADDR_TO_UINT64(*eth_addr);
1125
1126 ghtx = (bool)((ioread32be(®s->rctrl) & RCTRL_GHTX) ? true : false);
1127 mcast = (bool)((addr & MAC_GROUP_ADDRESS) ? true : false);
1128
1129 /* Cannot handle unicast mac addr when GHTX is on */
1130 if (ghtx && !mcast) {
1131 pr_err("Could not compute hash bucket\n");
1132 return -EINVAL;
1133 }
1134 crc = crc32_le(crc, (u8 *)eth_addr, ETH_ALEN);
1135 crc = bitrev32(crc);
1136
1137 if (ghtx) {
1138 bucket = (s32)((crc >> 23) & 0x1ff);
1139 } else {
1140 bucket = (s32)((crc >> 24) & 0xff);
1141 /* if !ghtx and mcast the bit must be set
1142 * in gaddr instead of igaddr.
1143 */
1144 if (mcast)
1145 bucket += 0x100;
1146 }
1147
1148 if (addr & MAC_GROUP_ADDRESS) {
1149 /* Group Address */
1150 list_for_each(pos,
1151 &dtsec->multicast_addr_hash->lsts[bucket]) {
1152 hash_entry = ETH_HASH_ENTRY_OBJ(pos);
1153 if (hash_entry && hash_entry->addr == addr) {
1154 list_del_init(&hash_entry->node);
1155 kfree(hash_entry);
1156 break;
1157 }
1158 }
1159 if (list_empty(&dtsec->multicast_addr_hash->lsts[bucket]))
1160 set_bucket(dtsec->regs, bucket, false);
1161 } else {
1162 /* Individual Address */
1163 list_for_each(pos,
1164 &dtsec->unicast_addr_hash->lsts[bucket]) {
1165 hash_entry = ETH_HASH_ENTRY_OBJ(pos);
1166 if (hash_entry && hash_entry->addr == addr) {
1167 list_del_init(&hash_entry->node);
1168 kfree(hash_entry);
1169 break;
1170 }
1171 }
1172 if (list_empty(&dtsec->unicast_addr_hash->lsts[bucket]))
1173 set_bucket(dtsec->regs, bucket, false);
1174 }
1175
1176 /* address does not exist */
1177 WARN_ON(!hash_entry);
1178
1179 return 0;
1180 }
1181
dtsec_set_promiscuous(struct fman_mac * dtsec,bool new_val)1182 static int dtsec_set_promiscuous(struct fman_mac *dtsec, bool new_val)
1183 {
1184 struct dtsec_regs __iomem *regs = dtsec->regs;
1185 u32 tmp;
1186
1187 /* Set unicast promiscuous */
1188 tmp = ioread32be(®s->rctrl);
1189 if (new_val)
1190 tmp |= RCTRL_UPROM;
1191 else
1192 tmp &= ~RCTRL_UPROM;
1193
1194 iowrite32be(tmp, ®s->rctrl);
1195
1196 /* Set multicast promiscuous */
1197 tmp = ioread32be(®s->rctrl);
1198 if (new_val)
1199 tmp |= RCTRL_MPROM;
1200 else
1201 tmp &= ~RCTRL_MPROM;
1202
1203 iowrite32be(tmp, ®s->rctrl);
1204
1205 return 0;
1206 }
1207
dtsec_set_exception(struct fman_mac * dtsec,enum fman_mac_exceptions exception,bool enable)1208 static int dtsec_set_exception(struct fman_mac *dtsec,
1209 enum fman_mac_exceptions exception, bool enable)
1210 {
1211 struct dtsec_regs __iomem *regs = dtsec->regs;
1212 u32 bit_mask = 0;
1213
1214 if (exception != FM_MAC_EX_1G_1588_TS_RX_ERR) {
1215 bit_mask = get_exception_flag(exception);
1216 if (bit_mask) {
1217 if (enable)
1218 dtsec->exceptions |= bit_mask;
1219 else
1220 dtsec->exceptions &= ~bit_mask;
1221 } else {
1222 pr_err("Undefined exception\n");
1223 return -EINVAL;
1224 }
1225 if (enable)
1226 iowrite32be(ioread32be(®s->imask) | bit_mask,
1227 ®s->imask);
1228 else
1229 iowrite32be(ioread32be(®s->imask) & ~bit_mask,
1230 ®s->imask);
1231 } else {
1232 if (!dtsec->ptp_tsu_enabled) {
1233 pr_err("Exception valid for 1588 only\n");
1234 return -EINVAL;
1235 }
1236 switch (exception) {
1237 case FM_MAC_EX_1G_1588_TS_RX_ERR:
1238 if (enable) {
1239 dtsec->en_tsu_err_exception = true;
1240 iowrite32be(ioread32be(®s->tmr_pemask) |
1241 TMR_PEMASK_TSREEN,
1242 ®s->tmr_pemask);
1243 } else {
1244 dtsec->en_tsu_err_exception = false;
1245 iowrite32be(ioread32be(®s->tmr_pemask) &
1246 ~TMR_PEMASK_TSREEN,
1247 ®s->tmr_pemask);
1248 }
1249 break;
1250 default:
1251 pr_err("Undefined exception\n");
1252 return -EINVAL;
1253 }
1254 }
1255
1256 return 0;
1257 }
1258
dtsec_init(struct fman_mac * dtsec)1259 static int dtsec_init(struct fman_mac *dtsec)
1260 {
1261 struct dtsec_regs __iomem *regs = dtsec->regs;
1262 struct dtsec_cfg *dtsec_drv_param;
1263 u16 max_frm_ln, tbicon;
1264 int err;
1265
1266 if (DEFAULT_RESET_ON_INIT &&
1267 (fman_reset_mac(dtsec->fm, dtsec->mac_id) != 0)) {
1268 pr_err("Can't reset MAC!\n");
1269 return -EINVAL;
1270 }
1271
1272 err = check_init_parameters(dtsec);
1273 if (err)
1274 return err;
1275
1276 dtsec_drv_param = dtsec->dtsec_drv_param;
1277
1278 err = init(dtsec->regs, dtsec_drv_param, dtsec->phy_if,
1279 dtsec->max_speed, dtsec->addr, dtsec->exceptions,
1280 dtsec->tbidev->addr);
1281 if (err) {
1282 free_init_resources(dtsec);
1283 pr_err("DTSEC version doesn't support this i/f mode\n");
1284 return err;
1285 }
1286
1287 /* Configure the TBI PHY Control Register */
1288 tbicon = TBICON_CLK_SELECT | TBICON_SOFT_RESET;
1289 mdiodev_write(dtsec->tbidev, MII_TBICON, tbicon);
1290
1291 tbicon = TBICON_CLK_SELECT;
1292 mdiodev_write(dtsec->tbidev, MII_TBICON, tbicon);
1293
1294 /* Max Frame Length */
1295 max_frm_ln = (u16)ioread32be(®s->maxfrm);
1296 err = fman_set_mac_max_frame(dtsec->fm, dtsec->mac_id, max_frm_ln);
1297 if (err) {
1298 pr_err("Setting max frame length failed\n");
1299 free_init_resources(dtsec);
1300 return -EINVAL;
1301 }
1302
1303 dtsec->multicast_addr_hash =
1304 alloc_hash_table(EXTENDED_HASH_TABLE_SIZE);
1305 if (!dtsec->multicast_addr_hash) {
1306 free_init_resources(dtsec);
1307 pr_err("MC hash table is failed\n");
1308 return -ENOMEM;
1309 }
1310
1311 dtsec->unicast_addr_hash = alloc_hash_table(DTSEC_HASH_TABLE_SIZE);
1312 if (!dtsec->unicast_addr_hash) {
1313 free_init_resources(dtsec);
1314 pr_err("UC hash table is failed\n");
1315 return -ENOMEM;
1316 }
1317
1318 /* register err intr handler for dtsec to FPM (err) */
1319 fman_register_intr(dtsec->fm, FMAN_MOD_MAC, dtsec->mac_id,
1320 FMAN_INTR_TYPE_ERR, dtsec_isr, dtsec);
1321 /* register 1588 intr handler for TMR to FPM (normal) */
1322 fman_register_intr(dtsec->fm, FMAN_MOD_MAC, dtsec->mac_id,
1323 FMAN_INTR_TYPE_NORMAL, dtsec_1588_isr, dtsec);
1324
1325 kfree(dtsec_drv_param);
1326 dtsec->dtsec_drv_param = NULL;
1327
1328 return 0;
1329 }
1330
dtsec_free(struct fman_mac * dtsec)1331 static int dtsec_free(struct fman_mac *dtsec)
1332 {
1333 free_init_resources(dtsec);
1334
1335 kfree(dtsec->dtsec_drv_param);
1336 dtsec->dtsec_drv_param = NULL;
1337 if (!IS_ERR_OR_NULL(dtsec->tbidev))
1338 put_device(&dtsec->tbidev->dev);
1339 kfree(dtsec);
1340
1341 return 0;
1342 }
1343
dtsec_config(struct mac_device * mac_dev,struct fman_mac_params * params)1344 static struct fman_mac *dtsec_config(struct mac_device *mac_dev,
1345 struct fman_mac_params *params)
1346 {
1347 struct fman_mac *dtsec;
1348 struct dtsec_cfg *dtsec_drv_param;
1349
1350 /* allocate memory for the UCC GETH data structure. */
1351 dtsec = kzalloc(sizeof(*dtsec), GFP_KERNEL);
1352 if (!dtsec)
1353 return NULL;
1354
1355 /* allocate memory for the d_tsec driver parameters data structure. */
1356 dtsec_drv_param = kzalloc(sizeof(*dtsec_drv_param), GFP_KERNEL);
1357 if (!dtsec_drv_param)
1358 goto err_dtsec;
1359
1360 /* Plant parameter structure pointer */
1361 dtsec->dtsec_drv_param = dtsec_drv_param;
1362
1363 set_dflts(dtsec_drv_param);
1364
1365 dtsec->regs = mac_dev->vaddr;
1366 dtsec->addr = ENET_ADDR_TO_UINT64(mac_dev->addr);
1367 dtsec->phy_if = mac_dev->phy_if;
1368 dtsec->mac_id = params->mac_id;
1369 dtsec->exceptions = (DTSEC_IMASK_BREN |
1370 DTSEC_IMASK_RXCEN |
1371 DTSEC_IMASK_BTEN |
1372 DTSEC_IMASK_TXCEN |
1373 DTSEC_IMASK_TXEEN |
1374 DTSEC_IMASK_ABRTEN |
1375 DTSEC_IMASK_LCEN |
1376 DTSEC_IMASK_CRLEN |
1377 DTSEC_IMASK_XFUNEN |
1378 DTSEC_IMASK_IFERREN |
1379 DTSEC_IMASK_MAGEN |
1380 DTSEC_IMASK_TDPEEN |
1381 DTSEC_IMASK_RDPEEN);
1382 dtsec->exception_cb = params->exception_cb;
1383 dtsec->event_cb = params->event_cb;
1384 dtsec->dev_id = mac_dev;
1385 dtsec->ptp_tsu_enabled = dtsec->dtsec_drv_param->ptp_tsu_en;
1386 dtsec->en_tsu_err_exception = dtsec->dtsec_drv_param->ptp_exception_en;
1387
1388 dtsec->fm = params->fm;
1389
1390 /* Save FMan revision */
1391 fman_get_revision(dtsec->fm, &dtsec->fm_rev_info);
1392
1393 return dtsec;
1394
1395 err_dtsec:
1396 kfree(dtsec);
1397 return NULL;
1398 }
1399
dtsec_initialization(struct mac_device * mac_dev,struct device_node * mac_node,struct fman_mac_params * params)1400 int dtsec_initialization(struct mac_device *mac_dev,
1401 struct device_node *mac_node,
1402 struct fman_mac_params *params)
1403 {
1404 int err;
1405 struct fman_mac *dtsec;
1406 struct device_node *phy_node;
1407 unsigned long capabilities;
1408 unsigned long *supported;
1409
1410 mac_dev->phylink_ops = &dtsec_mac_ops;
1411 mac_dev->set_promisc = dtsec_set_promiscuous;
1412 mac_dev->change_addr = dtsec_modify_mac_address;
1413 mac_dev->add_hash_mac_addr = dtsec_add_hash_mac_address;
1414 mac_dev->remove_hash_mac_addr = dtsec_del_hash_mac_address;
1415 mac_dev->set_exception = dtsec_set_exception;
1416 mac_dev->set_allmulti = dtsec_set_allmulti;
1417 mac_dev->set_tstamp = dtsec_set_tstamp;
1418 mac_dev->set_multi = fman_set_multi;
1419 mac_dev->enable = dtsec_enable;
1420 mac_dev->disable = dtsec_disable;
1421
1422 mac_dev->fman_mac = dtsec_config(mac_dev, params);
1423 if (!mac_dev->fman_mac) {
1424 err = -EINVAL;
1425 goto _return;
1426 }
1427
1428 dtsec = mac_dev->fman_mac;
1429 dtsec->dtsec_drv_param->maximum_frame = fman_get_max_frm();
1430 dtsec->dtsec_drv_param->tx_pad_crc = true;
1431
1432 phy_node = of_parse_phandle(mac_node, "tbi-handle", 0);
1433 if (!phy_node || !of_device_is_available(phy_node)) {
1434 of_node_put(phy_node);
1435 err = -EINVAL;
1436 dev_err_probe(mac_dev->dev, err,
1437 "TBI PCS node is not available\n");
1438 goto _return_fm_mac_free;
1439 }
1440
1441 dtsec->tbidev = of_mdio_find_device(phy_node);
1442 of_node_put(phy_node);
1443 if (!dtsec->tbidev) {
1444 err = -EPROBE_DEFER;
1445 dev_err_probe(mac_dev->dev, err,
1446 "could not find mdiodev for PCS\n");
1447 goto _return_fm_mac_free;
1448 }
1449 dtsec->pcs.ops = &dtsec_pcs_ops;
1450 dtsec->pcs.neg_mode = true;
1451 dtsec->pcs.poll = true;
1452
1453 supported = mac_dev->phylink_config.supported_interfaces;
1454
1455 /* FIXME: Can we use DTSEC_ID2_INT_FULL_OFF to determine if these are
1456 * supported? If not, we can determine support via the phy if SerDes
1457 * support is added.
1458 */
1459 if (mac_dev->phy_if == PHY_INTERFACE_MODE_SGMII ||
1460 mac_dev->phy_if == PHY_INTERFACE_MODE_1000BASEX) {
1461 __set_bit(PHY_INTERFACE_MODE_SGMII, supported);
1462 __set_bit(PHY_INTERFACE_MODE_1000BASEX, supported);
1463 } else if (mac_dev->phy_if == PHY_INTERFACE_MODE_2500BASEX) {
1464 __set_bit(PHY_INTERFACE_MODE_2500BASEX, supported);
1465 }
1466
1467 if (!(ioread32be(&dtsec->regs->tsec_id2) & DTSEC_ID2_INT_REDUCED_OFF)) {
1468 phy_interface_set_rgmii(supported);
1469
1470 /* DTSEC_ID2_INT_REDUCED_OFF indicates that the dTSEC supports
1471 * RMII and RGMII. However, the only SoCs which support RMII
1472 * are the P1017 and P1023. Avoid advertising this mode on
1473 * other SoCs. This is a bit of a moot point, since there's no
1474 * in-tree support for ethernet on these platforms...
1475 */
1476 if (of_machine_is_compatible("fsl,P1023") ||
1477 of_machine_is_compatible("fsl,P1023RDB"))
1478 __set_bit(PHY_INTERFACE_MODE_RMII, supported);
1479 }
1480
1481 capabilities = MAC_SYM_PAUSE | MAC_ASYM_PAUSE;
1482 capabilities |= MAC_10 | MAC_100 | MAC_1000FD | MAC_2500FD;
1483 mac_dev->phylink_config.mac_capabilities = capabilities;
1484
1485 err = dtsec_init(dtsec);
1486 if (err < 0)
1487 goto _return_fm_mac_free;
1488
1489 /* For 1G MAC, disable by default the MIB counters overflow interrupt */
1490 err = dtsec_set_exception(dtsec, FM_MAC_EX_1G_RX_MIB_CNT_OVFL, false);
1491 if (err < 0)
1492 goto _return_fm_mac_free;
1493
1494 dev_info(mac_dev->dev, "FMan dTSEC version: 0x%08x\n",
1495 ioread32be(&dtsec->regs->tsec_id));
1496
1497 goto _return;
1498
1499 _return_fm_mac_free:
1500 dtsec_free(dtsec);
1501
1502 _return:
1503 return err;
1504 }
1505