xref: /linux/drivers/net/ethernet/atheros/atlx/atl1.c (revision 621cde16e49b3ecf7d59a8106a20aaebfb4a59a9)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright(c) 2005 - 2006 Attansic Corporation. All rights reserved.
4  * Copyright(c) 2006 - 2007 Chris Snook <csnook@redhat.com>
5  * Copyright(c) 2006 - 2008 Jay Cliburn <jcliburn@gmail.com>
6  *
7  * Derived from Intel e1000 driver
8  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
9  *
10  * Contact Information:
11  * Xiong Huang <xiong.huang@atheros.com>
12  * Jie Yang <jie.yang@atheros.com>
13  * Chris Snook <csnook@redhat.com>
14  * Jay Cliburn <jcliburn@gmail.com>
15  *
16  * This version is adapted from the Attansic reference driver.
17  *
18  * TODO:
19  * Add more ethtool functions.
20  * Fix abstruse irq enable/disable condition described here:
21  *	http://marc.theaimsgroup.com/?l=linux-netdev&m=116398508500553&w=2
22  *
23  * NEEDS TESTING:
24  * VLAN
25  * multicast
26  * promiscuous mode
27  * interrupt coalescing
28  * SMP torture testing
29  */
30 
31 #include <linux/atomic.h>
32 #include <asm/byteorder.h>
33 
34 #include <linux/compiler.h>
35 #include <linux/crc32.h>
36 #include <linux/delay.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/etherdevice.h>
39 #include <linux/hardirq.h>
40 #include <linux/if_ether.h>
41 #include <linux/if_vlan.h>
42 #include <linux/in.h>
43 #include <linux/interrupt.h>
44 #include <linux/ip.h>
45 #include <linux/irqflags.h>
46 #include <linux/irqreturn.h>
47 #include <linux/jiffies.h>
48 #include <linux/mii.h>
49 #include <linux/module.h>
50 #include <linux/net.h>
51 #include <linux/netdevice.h>
52 #include <linux/pci.h>
53 #include <linux/pci_ids.h>
54 #include <linux/pm.h>
55 #include <linux/skbuff.h>
56 #include <linux/slab.h>
57 #include <linux/spinlock.h>
58 #include <linux/string.h>
59 #include <linux/tcp.h>
60 #include <linux/timer.h>
61 #include <linux/types.h>
62 #include <linux/workqueue.h>
63 
64 #include <net/checksum.h>
65 
66 #include "atl1.h"
67 
68 MODULE_AUTHOR("Xiong Huang <xiong.huang@atheros.com>, "
69 	      "Chris Snook <csnook@redhat.com>, "
70 	      "Jay Cliburn <jcliburn@gmail.com>");
71 MODULE_LICENSE("GPL");
72 
73 /* Temporary hack for merging atl1 and atl2 */
74 #include "atlx.c"
75 
76 static const struct ethtool_ops atl1_ethtool_ops;
77 
78 /*
79  * This is the only thing that needs to be changed to adjust the
80  * maximum number of ports that the driver can manage.
81  */
82 #define ATL1_MAX_NIC 4
83 
84 #define OPTION_UNSET    -1
85 #define OPTION_DISABLED 0
86 #define OPTION_ENABLED  1
87 
88 #define ATL1_PARAM_INIT { [0 ... ATL1_MAX_NIC] = OPTION_UNSET }
89 
90 /*
91  * Interrupt Moderate Timer in units of 2 us
92  *
93  * Valid Range: 10-65535
94  *
95  * Default Value: 100 (200us)
96  */
97 static int int_mod_timer[ATL1_MAX_NIC+1] = ATL1_PARAM_INIT;
98 static unsigned int num_int_mod_timer;
99 module_param_array_named(int_mod_timer, int_mod_timer, int,
100 	&num_int_mod_timer, 0);
101 MODULE_PARM_DESC(int_mod_timer, "Interrupt moderator timer");
102 
103 #define DEFAULT_INT_MOD_CNT	100	/* 200us */
104 #define MAX_INT_MOD_CNT		65000
105 #define MIN_INT_MOD_CNT		50
106 
107 struct atl1_option {
108 	enum { enable_option, range_option, list_option } type;
109 	char *name;
110 	char *err;
111 	int def;
112 	union {
113 		struct {	/* range_option info */
114 			int min;
115 			int max;
116 		} r;
117 		struct {	/* list_option info */
118 			int nr;
119 			struct atl1_opt_list {
120 				int i;
121 				char *str;
122 			} *p;
123 		} l;
124 	} arg;
125 };
126 
atl1_validate_option(int * value,struct atl1_option * opt,struct pci_dev * pdev)127 static int atl1_validate_option(int *value, struct atl1_option *opt,
128 				struct pci_dev *pdev)
129 {
130 	if (*value == OPTION_UNSET) {
131 		*value = opt->def;
132 		return 0;
133 	}
134 
135 	switch (opt->type) {
136 	case enable_option:
137 		switch (*value) {
138 		case OPTION_ENABLED:
139 			dev_info(&pdev->dev, "%s enabled\n", opt->name);
140 			return 0;
141 		case OPTION_DISABLED:
142 			dev_info(&pdev->dev, "%s disabled\n", opt->name);
143 			return 0;
144 		}
145 		break;
146 	case range_option:
147 		if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) {
148 			dev_info(&pdev->dev, "%s set to %i\n", opt->name,
149 				*value);
150 			return 0;
151 		}
152 		break;
153 	case list_option:{
154 			int i;
155 			struct atl1_opt_list *ent;
156 
157 			for (i = 0; i < opt->arg.l.nr; i++) {
158 				ent = &opt->arg.l.p[i];
159 				if (*value == ent->i) {
160 					if (ent->str[0] != '\0')
161 						dev_info(&pdev->dev, "%s\n",
162 							ent->str);
163 					return 0;
164 				}
165 			}
166 		}
167 		break;
168 
169 	default:
170 		break;
171 	}
172 
173 	dev_info(&pdev->dev, "invalid %s specified (%i) %s\n",
174 		opt->name, *value, opt->err);
175 	*value = opt->def;
176 	return -1;
177 }
178 
179 /**
180  * atl1_check_options - Range Checking for Command Line Parameters
181  * @adapter: board private structure
182  *
183  * This routine checks all command line parameters for valid user
184  * input.  If an invalid value is given, or if no user specified
185  * value exists, a default value is used.  The final value is stored
186  * in a variable in the adapter structure.
187  */
atl1_check_options(struct atl1_adapter * adapter)188 static void atl1_check_options(struct atl1_adapter *adapter)
189 {
190 	struct pci_dev *pdev = adapter->pdev;
191 	int bd = adapter->bd_number;
192 	if (bd >= ATL1_MAX_NIC) {
193 		dev_notice(&pdev->dev, "no configuration for board#%i\n", bd);
194 		dev_notice(&pdev->dev, "using defaults for all values\n");
195 	}
196 	{			/* Interrupt Moderate Timer */
197 		struct atl1_option opt = {
198 			.type = range_option,
199 			.name = "Interrupt Moderator Timer",
200 			.err = "using default of "
201 				__MODULE_STRING(DEFAULT_INT_MOD_CNT),
202 			.def = DEFAULT_INT_MOD_CNT,
203 			.arg = {.r = {.min = MIN_INT_MOD_CNT,
204 					.max = MAX_INT_MOD_CNT} }
205 		};
206 		int val;
207 		if (num_int_mod_timer > bd) {
208 			val = int_mod_timer[bd];
209 			atl1_validate_option(&val, &opt, pdev);
210 			adapter->imt = (u16) val;
211 		} else
212 			adapter->imt = (u16) (opt.def);
213 	}
214 }
215 
216 /*
217  * atl1_pci_tbl - PCI Device ID Table
218  */
219 static const struct pci_device_id atl1_pci_tbl[] = {
220 	{PCI_DEVICE(PCI_VENDOR_ID_ATTANSIC, PCI_DEVICE_ID_ATTANSIC_L1)},
221 	/* required last entry */
222 	{0,}
223 };
224 MODULE_DEVICE_TABLE(pci, atl1_pci_tbl);
225 
226 static const u32 atl1_default_msg = NETIF_MSG_DRV | NETIF_MSG_PROBE |
227 	NETIF_MSG_LINK | NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP;
228 
229 static int debug = -1;
230 module_param(debug, int, 0);
231 MODULE_PARM_DESC(debug, "Message level (0=none,...,16=all)");
232 
233 /*
234  * Reset the transmit and receive units; mask and clear all interrupts.
235  * hw - Struct containing variables accessed by shared code
236  * return : 0  or  idle status (if error)
237  */
atl1_reset_hw(struct atl1_hw * hw)238 static s32 atl1_reset_hw(struct atl1_hw *hw)
239 {
240 	struct pci_dev *pdev = hw->back->pdev;
241 	struct atl1_adapter *adapter = hw->back;
242 	u32 icr;
243 	int i;
244 
245 	/*
246 	 * Clear Interrupt mask to stop board from generating
247 	 * interrupts & Clear any pending interrupt events
248 	 */
249 	/*
250 	 * atlx_irq_disable(adapter);
251 	 * iowrite32(0xffffffff, hw->hw_addr + REG_ISR);
252 	 */
253 
254 	/*
255 	 * Issue Soft Reset to the MAC.  This will reset the chip's
256 	 * transmit, receive, DMA.  It will not effect
257 	 * the current PCI configuration.  The global reset bit is self-
258 	 * clearing, and should clear within a microsecond.
259 	 */
260 	iowrite32(MASTER_CTRL_SOFT_RST, hw->hw_addr + REG_MASTER_CTRL);
261 	ioread32(hw->hw_addr + REG_MASTER_CTRL);
262 
263 	iowrite16(1, hw->hw_addr + REG_PHY_ENABLE);
264 	ioread16(hw->hw_addr + REG_PHY_ENABLE);
265 
266 	/* delay about 1ms */
267 	msleep(1);
268 
269 	/* Wait at least 10ms for All module to be Idle */
270 	for (i = 0; i < 10; i++) {
271 		icr = ioread32(hw->hw_addr + REG_IDLE_STATUS);
272 		if (!icr)
273 			break;
274 		/* delay 1 ms */
275 		msleep(1);
276 		/* FIXME: still the right way to do this? */
277 		cpu_relax();
278 	}
279 
280 	if (icr) {
281 		if (netif_msg_hw(adapter))
282 			dev_dbg(&pdev->dev, "ICR = 0x%x\n", icr);
283 		return icr;
284 	}
285 
286 	return 0;
287 }
288 
289 /* function about EEPROM
290  *
291  * check_eeprom_exist
292  * return 0 if eeprom exist
293  */
atl1_check_eeprom_exist(struct atl1_hw * hw)294 static int atl1_check_eeprom_exist(struct atl1_hw *hw)
295 {
296 	u32 value;
297 	value = ioread32(hw->hw_addr + REG_SPI_FLASH_CTRL);
298 	if (value & SPI_FLASH_CTRL_EN_VPD) {
299 		value &= ~SPI_FLASH_CTRL_EN_VPD;
300 		iowrite32(value, hw->hw_addr + REG_SPI_FLASH_CTRL);
301 	}
302 
303 	value = ioread16(hw->hw_addr + REG_PCIE_CAP_LIST);
304 	return ((value & 0xFF00) == 0x6C00) ? 0 : 1;
305 }
306 
atl1_read_eeprom(struct atl1_hw * hw,u32 offset,u32 * p_value)307 static bool atl1_read_eeprom(struct atl1_hw *hw, u32 offset, u32 *p_value)
308 {
309 	int i;
310 	u32 control;
311 
312 	if (offset & 3)
313 		/* address do not align */
314 		return false;
315 
316 	iowrite32(0, hw->hw_addr + REG_VPD_DATA);
317 	control = (offset & VPD_CAP_VPD_ADDR_MASK) << VPD_CAP_VPD_ADDR_SHIFT;
318 	iowrite32(control, hw->hw_addr + REG_VPD_CAP);
319 	ioread32(hw->hw_addr + REG_VPD_CAP);
320 
321 	for (i = 0; i < 10; i++) {
322 		msleep(2);
323 		control = ioread32(hw->hw_addr + REG_VPD_CAP);
324 		if (control & VPD_CAP_VPD_FLAG)
325 			break;
326 	}
327 	if (control & VPD_CAP_VPD_FLAG) {
328 		*p_value = ioread32(hw->hw_addr + REG_VPD_DATA);
329 		return true;
330 	}
331 	/* timeout */
332 	return false;
333 }
334 
335 /*
336  * Reads the value from a PHY register
337  * hw - Struct containing variables accessed by shared code
338  * reg_addr - address of the PHY register to read
339  */
atl1_read_phy_reg(struct atl1_hw * hw,u16 reg_addr,u16 * phy_data)340 static s32 atl1_read_phy_reg(struct atl1_hw *hw, u16 reg_addr, u16 *phy_data)
341 {
342 	u32 val;
343 	int i;
344 
345 	val = ((u32) (reg_addr & MDIO_REG_ADDR_MASK)) << MDIO_REG_ADDR_SHIFT |
346 		MDIO_START | MDIO_SUP_PREAMBLE | MDIO_RW | MDIO_CLK_25_4 <<
347 		MDIO_CLK_SEL_SHIFT;
348 	iowrite32(val, hw->hw_addr + REG_MDIO_CTRL);
349 	ioread32(hw->hw_addr + REG_MDIO_CTRL);
350 
351 	for (i = 0; i < MDIO_WAIT_TIMES; i++) {
352 		udelay(2);
353 		val = ioread32(hw->hw_addr + REG_MDIO_CTRL);
354 		if (!(val & (MDIO_START | MDIO_BUSY)))
355 			break;
356 	}
357 	if (!(val & (MDIO_START | MDIO_BUSY))) {
358 		*phy_data = (u16) val;
359 		return 0;
360 	}
361 	return ATLX_ERR_PHY;
362 }
363 
364 #define CUSTOM_SPI_CS_SETUP	2
365 #define CUSTOM_SPI_CLK_HI	2
366 #define CUSTOM_SPI_CLK_LO	2
367 #define CUSTOM_SPI_CS_HOLD	2
368 #define CUSTOM_SPI_CS_HI	3
369 
atl1_spi_read(struct atl1_hw * hw,u32 addr,u32 * buf)370 static bool atl1_spi_read(struct atl1_hw *hw, u32 addr, u32 *buf)
371 {
372 	int i;
373 	u32 value;
374 
375 	iowrite32(0, hw->hw_addr + REG_SPI_DATA);
376 	iowrite32(addr, hw->hw_addr + REG_SPI_ADDR);
377 
378 	value = SPI_FLASH_CTRL_WAIT_READY |
379 	    (CUSTOM_SPI_CS_SETUP & SPI_FLASH_CTRL_CS_SETUP_MASK) <<
380 	    SPI_FLASH_CTRL_CS_SETUP_SHIFT | (CUSTOM_SPI_CLK_HI &
381 					     SPI_FLASH_CTRL_CLK_HI_MASK) <<
382 	    SPI_FLASH_CTRL_CLK_HI_SHIFT | (CUSTOM_SPI_CLK_LO &
383 					   SPI_FLASH_CTRL_CLK_LO_MASK) <<
384 	    SPI_FLASH_CTRL_CLK_LO_SHIFT | (CUSTOM_SPI_CS_HOLD &
385 					   SPI_FLASH_CTRL_CS_HOLD_MASK) <<
386 	    SPI_FLASH_CTRL_CS_HOLD_SHIFT | (CUSTOM_SPI_CS_HI &
387 					    SPI_FLASH_CTRL_CS_HI_MASK) <<
388 	    SPI_FLASH_CTRL_CS_HI_SHIFT | (1 & SPI_FLASH_CTRL_INS_MASK) <<
389 	    SPI_FLASH_CTRL_INS_SHIFT;
390 
391 	iowrite32(value, hw->hw_addr + REG_SPI_FLASH_CTRL);
392 
393 	value |= SPI_FLASH_CTRL_START;
394 	iowrite32(value, hw->hw_addr + REG_SPI_FLASH_CTRL);
395 	ioread32(hw->hw_addr + REG_SPI_FLASH_CTRL);
396 
397 	for (i = 0; i < 10; i++) {
398 		msleep(1);
399 		value = ioread32(hw->hw_addr + REG_SPI_FLASH_CTRL);
400 		if (!(value & SPI_FLASH_CTRL_START))
401 			break;
402 	}
403 
404 	if (value & SPI_FLASH_CTRL_START)
405 		return false;
406 
407 	*buf = ioread32(hw->hw_addr + REG_SPI_DATA);
408 
409 	return true;
410 }
411 
412 /*
413  * get_permanent_address
414  * return 0 if get valid mac address,
415  */
atl1_get_permanent_address(struct atl1_hw * hw)416 static int atl1_get_permanent_address(struct atl1_hw *hw)
417 {
418 	u32 addr[2];
419 	u32 i, control;
420 	u16 reg;
421 	u8 eth_addr[ETH_ALEN];
422 	bool key_valid;
423 
424 	if (is_valid_ether_addr(hw->perm_mac_addr))
425 		return 0;
426 
427 	/* init */
428 	addr[0] = addr[1] = 0;
429 
430 	if (!atl1_check_eeprom_exist(hw)) {
431 		reg = 0;
432 		key_valid = false;
433 		/* Read out all EEPROM content */
434 		i = 0;
435 		while (1) {
436 			if (atl1_read_eeprom(hw, i + 0x100, &control)) {
437 				if (key_valid) {
438 					if (reg == REG_MAC_STA_ADDR)
439 						addr[0] = control;
440 					else if (reg == (REG_MAC_STA_ADDR + 4))
441 						addr[1] = control;
442 					key_valid = false;
443 				} else if ((control & 0xff) == 0x5A) {
444 					key_valid = true;
445 					reg = (u16) (control >> 16);
446 				} else
447 					break;
448 			} else
449 				/* read error */
450 				break;
451 			i += 4;
452 		}
453 
454 		*(u32 *) &eth_addr[2] = swab32(addr[0]);
455 		*(u16 *) &eth_addr[0] = swab16(*(u16 *) &addr[1]);
456 		if (is_valid_ether_addr(eth_addr)) {
457 			memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
458 			return 0;
459 		}
460 	}
461 
462 	/* see if SPI FLAGS exist ? */
463 	addr[0] = addr[1] = 0;
464 	reg = 0;
465 	key_valid = false;
466 	i = 0;
467 	while (1) {
468 		if (atl1_spi_read(hw, i + 0x1f000, &control)) {
469 			if (key_valid) {
470 				if (reg == REG_MAC_STA_ADDR)
471 					addr[0] = control;
472 				else if (reg == (REG_MAC_STA_ADDR + 4))
473 					addr[1] = control;
474 				key_valid = false;
475 			} else if ((control & 0xff) == 0x5A) {
476 				key_valid = true;
477 				reg = (u16) (control >> 16);
478 			} else
479 				/* data end */
480 				break;
481 		} else
482 			/* read error */
483 			break;
484 		i += 4;
485 	}
486 
487 	*(u32 *) &eth_addr[2] = swab32(addr[0]);
488 	*(u16 *) &eth_addr[0] = swab16(*(u16 *) &addr[1]);
489 	if (is_valid_ether_addr(eth_addr)) {
490 		memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
491 		return 0;
492 	}
493 
494 	/*
495 	 * On some motherboards, the MAC address is written by the
496 	 * BIOS directly to the MAC register during POST, and is
497 	 * not stored in eeprom.  If all else thus far has failed
498 	 * to fetch the permanent MAC address, try reading it directly.
499 	 */
500 	addr[0] = ioread32(hw->hw_addr + REG_MAC_STA_ADDR);
501 	addr[1] = ioread16(hw->hw_addr + (REG_MAC_STA_ADDR + 4));
502 	*(u32 *) &eth_addr[2] = swab32(addr[0]);
503 	*(u16 *) &eth_addr[0] = swab16(*(u16 *) &addr[1]);
504 	if (is_valid_ether_addr(eth_addr)) {
505 		memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
506 		return 0;
507 	}
508 
509 	return 1;
510 }
511 
512 /*
513  * Reads the adapter's MAC address from the EEPROM
514  * hw - Struct containing variables accessed by shared code
515  */
atl1_read_mac_addr(struct atl1_hw * hw)516 static s32 atl1_read_mac_addr(struct atl1_hw *hw)
517 {
518 	s32 ret = 0;
519 	u16 i;
520 
521 	if (atl1_get_permanent_address(hw)) {
522 		eth_random_addr(hw->perm_mac_addr);
523 		ret = 1;
524 	}
525 
526 	for (i = 0; i < ETH_ALEN; i++)
527 		hw->mac_addr[i] = hw->perm_mac_addr[i];
528 	return ret;
529 }
530 
531 /*
532  * Hashes an address to determine its location in the multicast table
533  * hw - Struct containing variables accessed by shared code
534  * mc_addr - the multicast address to hash
535  *
536  * atl1_hash_mc_addr
537  *  purpose
538  *      set hash value for a multicast address
539  *      hash calcu processing :
540  *          1. calcu 32bit CRC for multicast address
541  *          2. reverse crc with MSB to LSB
542  */
atl1_hash_mc_addr(struct atl1_hw * hw,u8 * mc_addr)543 static u32 atl1_hash_mc_addr(struct atl1_hw *hw, u8 *mc_addr)
544 {
545 	u32 crc32, value = 0;
546 	int i;
547 
548 	crc32 = ether_crc_le(6, mc_addr);
549 	for (i = 0; i < 32; i++)
550 		value |= (((crc32 >> i) & 1) << (31 - i));
551 
552 	return value;
553 }
554 
555 /*
556  * Sets the bit in the multicast table corresponding to the hash value.
557  * hw - Struct containing variables accessed by shared code
558  * hash_value - Multicast address hash value
559  */
atl1_hash_set(struct atl1_hw * hw,u32 hash_value)560 static void atl1_hash_set(struct atl1_hw *hw, u32 hash_value)
561 {
562 	u32 hash_bit, hash_reg;
563 	u32 mta;
564 
565 	/*
566 	 * The HASH Table  is a register array of 2 32-bit registers.
567 	 * It is treated like an array of 64 bits.  We want to set
568 	 * bit BitArray[hash_value]. So we figure out what register
569 	 * the bit is in, read it, OR in the new bit, then write
570 	 * back the new value.  The register is determined by the
571 	 * upper 7 bits of the hash value and the bit within that
572 	 * register are determined by the lower 5 bits of the value.
573 	 */
574 	hash_reg = (hash_value >> 31) & 0x1;
575 	hash_bit = (hash_value >> 26) & 0x1F;
576 	mta = ioread32((hw->hw_addr + REG_RX_HASH_TABLE) + (hash_reg << 2));
577 	mta |= (1 << hash_bit);
578 	iowrite32(mta, (hw->hw_addr + REG_RX_HASH_TABLE) + (hash_reg << 2));
579 }
580 
581 /*
582  * Writes a value to a PHY register
583  * hw - Struct containing variables accessed by shared code
584  * reg_addr - address of the PHY register to write
585  * data - data to write to the PHY
586  */
atl1_write_phy_reg(struct atl1_hw * hw,u32 reg_addr,u16 phy_data)587 static s32 atl1_write_phy_reg(struct atl1_hw *hw, u32 reg_addr, u16 phy_data)
588 {
589 	int i;
590 	u32 val;
591 
592 	val = ((u32) (phy_data & MDIO_DATA_MASK)) << MDIO_DATA_SHIFT |
593 	    (reg_addr & MDIO_REG_ADDR_MASK) << MDIO_REG_ADDR_SHIFT |
594 	    MDIO_SUP_PREAMBLE |
595 	    MDIO_START | MDIO_CLK_25_4 << MDIO_CLK_SEL_SHIFT;
596 	iowrite32(val, hw->hw_addr + REG_MDIO_CTRL);
597 	ioread32(hw->hw_addr + REG_MDIO_CTRL);
598 
599 	for (i = 0; i < MDIO_WAIT_TIMES; i++) {
600 		udelay(2);
601 		val = ioread32(hw->hw_addr + REG_MDIO_CTRL);
602 		if (!(val & (MDIO_START | MDIO_BUSY)))
603 			break;
604 	}
605 
606 	if (!(val & (MDIO_START | MDIO_BUSY)))
607 		return 0;
608 
609 	return ATLX_ERR_PHY;
610 }
611 
612 /*
613  * Make L001's PHY out of Power Saving State (bug)
614  * hw - Struct containing variables accessed by shared code
615  * when power on, L001's PHY always on Power saving State
616  * (Gigabit Link forbidden)
617  */
atl1_phy_leave_power_saving(struct atl1_hw * hw)618 static s32 atl1_phy_leave_power_saving(struct atl1_hw *hw)
619 {
620 	s32 ret;
621 	ret = atl1_write_phy_reg(hw, 29, 0x0029);
622 	if (ret)
623 		return ret;
624 	return atl1_write_phy_reg(hw, 30, 0);
625 }
626 
627 /*
628  * Resets the PHY and make all config validate
629  * hw - Struct containing variables accessed by shared code
630  *
631  * Sets bit 15 and 12 of the MII Control regiser (for F001 bug)
632  */
atl1_phy_reset(struct atl1_hw * hw)633 static s32 atl1_phy_reset(struct atl1_hw *hw)
634 {
635 	struct pci_dev *pdev = hw->back->pdev;
636 	struct atl1_adapter *adapter = hw->back;
637 	s32 ret_val;
638 	u16 phy_data;
639 
640 	if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
641 	    hw->media_type == MEDIA_TYPE_1000M_FULL)
642 		phy_data = MII_CR_RESET | MII_CR_AUTO_NEG_EN;
643 	else {
644 		switch (hw->media_type) {
645 		case MEDIA_TYPE_100M_FULL:
646 			phy_data =
647 			    MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
648 			    MII_CR_RESET;
649 			break;
650 		case MEDIA_TYPE_100M_HALF:
651 			phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
652 			break;
653 		case MEDIA_TYPE_10M_FULL:
654 			phy_data =
655 			    MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
656 			break;
657 		default:
658 			/* MEDIA_TYPE_10M_HALF: */
659 			phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
660 			break;
661 		}
662 	}
663 
664 	ret_val = atl1_write_phy_reg(hw, MII_BMCR, phy_data);
665 	if (ret_val) {
666 		u32 val;
667 		int i;
668 		/* pcie serdes link may be down! */
669 		if (netif_msg_hw(adapter))
670 			dev_dbg(&pdev->dev, "pcie phy link down\n");
671 
672 		for (i = 0; i < 25; i++) {
673 			msleep(1);
674 			val = ioread32(hw->hw_addr + REG_MDIO_CTRL);
675 			if (!(val & (MDIO_START | MDIO_BUSY)))
676 				break;
677 		}
678 
679 		if ((val & (MDIO_START | MDIO_BUSY)) != 0) {
680 			if (netif_msg_hw(adapter))
681 				dev_warn(&pdev->dev,
682 					"pcie link down at least 25ms\n");
683 			return ret_val;
684 		}
685 	}
686 	return 0;
687 }
688 
689 /*
690  * Configures PHY autoneg and flow control advertisement settings
691  * hw - Struct containing variables accessed by shared code
692  */
atl1_phy_setup_autoneg_adv(struct atl1_hw * hw)693 static s32 atl1_phy_setup_autoneg_adv(struct atl1_hw *hw)
694 {
695 	s32 ret_val;
696 	s16 mii_autoneg_adv_reg;
697 	s16 mii_1000t_ctrl_reg;
698 
699 	/* Read the MII Auto-Neg Advertisement Register (Address 4). */
700 	mii_autoneg_adv_reg = MII_AR_DEFAULT_CAP_MASK;
701 
702 	/* Read the MII 1000Base-T Control Register (Address 9). */
703 	mii_1000t_ctrl_reg = MII_ATLX_CR_1000T_DEFAULT_CAP_MASK;
704 
705 	/*
706 	 * First we clear all the 10/100 mb speed bits in the Auto-Neg
707 	 * Advertisement Register (Address 4) and the 1000 mb speed bits in
708 	 * the  1000Base-T Control Register (Address 9).
709 	 */
710 	mii_autoneg_adv_reg &= ~MII_AR_SPEED_MASK;
711 	mii_1000t_ctrl_reg &= ~MII_ATLX_CR_1000T_SPEED_MASK;
712 
713 	/*
714 	 * Need to parse media_type  and set up
715 	 * the appropriate PHY registers.
716 	 */
717 	switch (hw->media_type) {
718 	case MEDIA_TYPE_AUTO_SENSOR:
719 		mii_autoneg_adv_reg |= (MII_AR_10T_HD_CAPS |
720 					MII_AR_10T_FD_CAPS |
721 					MII_AR_100TX_HD_CAPS |
722 					MII_AR_100TX_FD_CAPS);
723 		mii_1000t_ctrl_reg |= MII_ATLX_CR_1000T_FD_CAPS;
724 		break;
725 
726 	case MEDIA_TYPE_1000M_FULL:
727 		mii_1000t_ctrl_reg |= MII_ATLX_CR_1000T_FD_CAPS;
728 		break;
729 
730 	case MEDIA_TYPE_100M_FULL:
731 		mii_autoneg_adv_reg |= MII_AR_100TX_FD_CAPS;
732 		break;
733 
734 	case MEDIA_TYPE_100M_HALF:
735 		mii_autoneg_adv_reg |= MII_AR_100TX_HD_CAPS;
736 		break;
737 
738 	case MEDIA_TYPE_10M_FULL:
739 		mii_autoneg_adv_reg |= MII_AR_10T_FD_CAPS;
740 		break;
741 
742 	default:
743 		mii_autoneg_adv_reg |= MII_AR_10T_HD_CAPS;
744 		break;
745 	}
746 
747 	/* flow control fixed to enable all */
748 	mii_autoneg_adv_reg |= (MII_AR_ASM_DIR | MII_AR_PAUSE);
749 
750 	hw->mii_autoneg_adv_reg = mii_autoneg_adv_reg;
751 	hw->mii_1000t_ctrl_reg = mii_1000t_ctrl_reg;
752 
753 	ret_val = atl1_write_phy_reg(hw, MII_ADVERTISE, mii_autoneg_adv_reg);
754 	if (ret_val)
755 		return ret_val;
756 
757 	ret_val = atl1_write_phy_reg(hw, MII_ATLX_CR, mii_1000t_ctrl_reg);
758 	if (ret_val)
759 		return ret_val;
760 
761 	return 0;
762 }
763 
764 /*
765  * Configures link settings.
766  * hw - Struct containing variables accessed by shared code
767  * Assumes the hardware has previously been reset and the
768  * transmitter and receiver are not enabled.
769  */
atl1_setup_link(struct atl1_hw * hw)770 static s32 atl1_setup_link(struct atl1_hw *hw)
771 {
772 	struct pci_dev *pdev = hw->back->pdev;
773 	struct atl1_adapter *adapter = hw->back;
774 	s32 ret_val;
775 
776 	/*
777 	 * Options:
778 	 *  PHY will advertise value(s) parsed from
779 	 *  autoneg_advertised and fc
780 	 *  no matter what autoneg is , We will not wait link result.
781 	 */
782 	ret_val = atl1_phy_setup_autoneg_adv(hw);
783 	if (ret_val) {
784 		if (netif_msg_link(adapter))
785 			dev_dbg(&pdev->dev,
786 				"error setting up autonegotiation\n");
787 		return ret_val;
788 	}
789 	/* SW.Reset , En-Auto-Neg if needed */
790 	ret_val = atl1_phy_reset(hw);
791 	if (ret_val) {
792 		if (netif_msg_link(adapter))
793 			dev_dbg(&pdev->dev, "error resetting phy\n");
794 		return ret_val;
795 	}
796 	hw->phy_configured = true;
797 	return ret_val;
798 }
799 
atl1_init_flash_opcode(struct atl1_hw * hw)800 static void atl1_init_flash_opcode(struct atl1_hw *hw)
801 {
802 	if (hw->flash_vendor >= ARRAY_SIZE(flash_table))
803 		/* Atmel */
804 		hw->flash_vendor = 0;
805 
806 	/* Init OP table */
807 	iowrite8(flash_table[hw->flash_vendor].cmd_program,
808 		hw->hw_addr + REG_SPI_FLASH_OP_PROGRAM);
809 	iowrite8(flash_table[hw->flash_vendor].cmd_sector_erase,
810 		hw->hw_addr + REG_SPI_FLASH_OP_SC_ERASE);
811 	iowrite8(flash_table[hw->flash_vendor].cmd_chip_erase,
812 		hw->hw_addr + REG_SPI_FLASH_OP_CHIP_ERASE);
813 	iowrite8(flash_table[hw->flash_vendor].cmd_rdid,
814 		hw->hw_addr + REG_SPI_FLASH_OP_RDID);
815 	iowrite8(flash_table[hw->flash_vendor].cmd_wren,
816 		hw->hw_addr + REG_SPI_FLASH_OP_WREN);
817 	iowrite8(flash_table[hw->flash_vendor].cmd_rdsr,
818 		hw->hw_addr + REG_SPI_FLASH_OP_RDSR);
819 	iowrite8(flash_table[hw->flash_vendor].cmd_wrsr,
820 		hw->hw_addr + REG_SPI_FLASH_OP_WRSR);
821 	iowrite8(flash_table[hw->flash_vendor].cmd_read,
822 		hw->hw_addr + REG_SPI_FLASH_OP_READ);
823 }
824 
825 /*
826  * Performs basic configuration of the adapter.
827  * hw - Struct containing variables accessed by shared code
828  * Assumes that the controller has previously been reset and is in a
829  * post-reset uninitialized state. Initializes multicast table,
830  * and  Calls routines to setup link
831  * Leaves the transmit and receive units disabled and uninitialized.
832  */
atl1_init_hw(struct atl1_hw * hw)833 static s32 atl1_init_hw(struct atl1_hw *hw)
834 {
835 	u32 ret_val = 0;
836 
837 	/* Zero out the Multicast HASH table */
838 	iowrite32(0, hw->hw_addr + REG_RX_HASH_TABLE);
839 	/* clear the old settings from the multicast hash table */
840 	iowrite32(0, (hw->hw_addr + REG_RX_HASH_TABLE) + (1 << 2));
841 
842 	atl1_init_flash_opcode(hw);
843 
844 	if (!hw->phy_configured) {
845 		/* enable GPHY LinkChange Interrupt */
846 		ret_val = atl1_write_phy_reg(hw, 18, 0xC00);
847 		if (ret_val)
848 			return ret_val;
849 		/* make PHY out of power-saving state */
850 		ret_val = atl1_phy_leave_power_saving(hw);
851 		if (ret_val)
852 			return ret_val;
853 		/* Call a subroutine to configure the link */
854 		ret_val = atl1_setup_link(hw);
855 	}
856 	return ret_val;
857 }
858 
859 /*
860  * Detects the current speed and duplex settings of the hardware.
861  * hw - Struct containing variables accessed by shared code
862  * speed - Speed of the connection
863  * duplex - Duplex setting of the connection
864  */
atl1_get_speed_and_duplex(struct atl1_hw * hw,u16 * speed,u16 * duplex)865 static s32 atl1_get_speed_and_duplex(struct atl1_hw *hw, u16 *speed, u16 *duplex)
866 {
867 	struct pci_dev *pdev = hw->back->pdev;
868 	struct atl1_adapter *adapter = hw->back;
869 	s32 ret_val;
870 	u16 phy_data;
871 
872 	/* ; --- Read   PHY Specific Status Register (17) */
873 	ret_val = atl1_read_phy_reg(hw, MII_ATLX_PSSR, &phy_data);
874 	if (ret_val)
875 		return ret_val;
876 
877 	if (!(phy_data & MII_ATLX_PSSR_SPD_DPLX_RESOLVED))
878 		return ATLX_ERR_PHY_RES;
879 
880 	switch (phy_data & MII_ATLX_PSSR_SPEED) {
881 	case MII_ATLX_PSSR_1000MBS:
882 		*speed = SPEED_1000;
883 		break;
884 	case MII_ATLX_PSSR_100MBS:
885 		*speed = SPEED_100;
886 		break;
887 	case MII_ATLX_PSSR_10MBS:
888 		*speed = SPEED_10;
889 		break;
890 	default:
891 		if (netif_msg_hw(adapter))
892 			dev_dbg(&pdev->dev, "error getting speed\n");
893 		return ATLX_ERR_PHY_SPEED;
894 	}
895 	if (phy_data & MII_ATLX_PSSR_DPLX)
896 		*duplex = FULL_DUPLEX;
897 	else
898 		*duplex = HALF_DUPLEX;
899 
900 	return 0;
901 }
902 
atl1_set_mac_addr(struct atl1_hw * hw)903 static void atl1_set_mac_addr(struct atl1_hw *hw)
904 {
905 	u32 value;
906 	/*
907 	 * 00-0B-6A-F6-00-DC
908 	 * 0:  6AF600DC   1: 000B
909 	 * low dword
910 	 */
911 	value = (((u32) hw->mac_addr[2]) << 24) |
912 	    (((u32) hw->mac_addr[3]) << 16) |
913 	    (((u32) hw->mac_addr[4]) << 8) | (((u32) hw->mac_addr[5]));
914 	iowrite32(value, hw->hw_addr + REG_MAC_STA_ADDR);
915 	/* high dword */
916 	value = (((u32) hw->mac_addr[0]) << 8) | (((u32) hw->mac_addr[1]));
917 	iowrite32(value, (hw->hw_addr + REG_MAC_STA_ADDR) + (1 << 2));
918 }
919 
920 /**
921  * atl1_sw_init - Initialize general software structures (struct atl1_adapter)
922  * @adapter: board private structure to initialize
923  *
924  * atl1_sw_init initializes the Adapter private data structure.
925  * Fields are initialized based on PCI device information and
926  * OS network device settings (MTU size).
927  */
atl1_sw_init(struct atl1_adapter * adapter)928 static int atl1_sw_init(struct atl1_adapter *adapter)
929 {
930 	struct atl1_hw *hw = &adapter->hw;
931 	struct net_device *netdev = adapter->netdev;
932 
933 	hw->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
934 	hw->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
935 
936 	adapter->wol = 0;
937 	device_set_wakeup_enable(&adapter->pdev->dev, false);
938 	adapter->rx_buffer_len = (hw->max_frame_size + 7) & ~7;
939 	adapter->ict = 50000;		/* 100ms */
940 	adapter->link_speed = SPEED_0;	/* hardware init */
941 	adapter->link_duplex = FULL_DUPLEX;
942 
943 	hw->phy_configured = false;
944 	hw->preamble_len = 7;
945 	hw->ipgt = 0x60;
946 	hw->min_ifg = 0x50;
947 	hw->ipgr1 = 0x40;
948 	hw->ipgr2 = 0x60;
949 	hw->max_retry = 0xf;
950 	hw->lcol = 0x37;
951 	hw->jam_ipg = 7;
952 	hw->rfd_burst = 8;
953 	hw->rrd_burst = 8;
954 	hw->rfd_fetch_gap = 1;
955 	hw->rx_jumbo_th = adapter->rx_buffer_len / 8;
956 	hw->rx_jumbo_lkah = 1;
957 	hw->rrd_ret_timer = 16;
958 	hw->tpd_burst = 4;
959 	hw->tpd_fetch_th = 16;
960 	hw->txf_burst = 0x100;
961 	hw->tx_jumbo_task_th = (hw->max_frame_size + 7) >> 3;
962 	hw->tpd_fetch_gap = 1;
963 	hw->rcb_value = atl1_rcb_64;
964 	hw->dma_ord = atl1_dma_ord_enh;
965 	hw->dmar_block = atl1_dma_req_256;
966 	hw->dmaw_block = atl1_dma_req_256;
967 	hw->cmb_rrd = 4;
968 	hw->cmb_tpd = 4;
969 	hw->cmb_rx_timer = 1;	/* about 2us */
970 	hw->cmb_tx_timer = 1;	/* about 2us */
971 	hw->smb_timer = 100000;	/* about 200ms */
972 
973 	spin_lock_init(&adapter->lock);
974 	spin_lock_init(&adapter->mb_lock);
975 
976 	return 0;
977 }
978 
mdio_read(struct net_device * netdev,int phy_id,int reg_num)979 static int mdio_read(struct net_device *netdev, int phy_id, int reg_num)
980 {
981 	struct atl1_adapter *adapter = netdev_priv(netdev);
982 	u16 result;
983 
984 	atl1_read_phy_reg(&adapter->hw, reg_num & 0x1f, &result);
985 
986 	return result;
987 }
988 
mdio_write(struct net_device * netdev,int phy_id,int reg_num,int val)989 static void mdio_write(struct net_device *netdev, int phy_id, int reg_num,
990 	int val)
991 {
992 	struct atl1_adapter *adapter = netdev_priv(netdev);
993 
994 	atl1_write_phy_reg(&adapter->hw, reg_num, val);
995 }
996 
atl1_mii_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)997 static int atl1_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
998 {
999 	struct atl1_adapter *adapter = netdev_priv(netdev);
1000 	unsigned long flags;
1001 	int retval;
1002 
1003 	if (!netif_running(netdev))
1004 		return -EINVAL;
1005 
1006 	spin_lock_irqsave(&adapter->lock, flags);
1007 	retval = generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
1008 	spin_unlock_irqrestore(&adapter->lock, flags);
1009 
1010 	return retval;
1011 }
1012 
1013 /**
1014  * atl1_setup_ring_resources - allocate Tx / RX descriptor resources
1015  * @adapter: board private structure
1016  *
1017  * Return 0 on success, negative on failure
1018  */
atl1_setup_ring_resources(struct atl1_adapter * adapter)1019 static s32 atl1_setup_ring_resources(struct atl1_adapter *adapter)
1020 {
1021 	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1022 	struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1023 	struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1024 	struct atl1_ring_header *ring_header = &adapter->ring_header;
1025 	struct pci_dev *pdev = adapter->pdev;
1026 	int size;
1027 	u8 offset = 0;
1028 
1029 	size = sizeof(struct atl1_buffer) * (tpd_ring->count + rfd_ring->count);
1030 	tpd_ring->buffer_info = kzalloc(size, GFP_KERNEL);
1031 	if (unlikely(!tpd_ring->buffer_info)) {
1032 		if (netif_msg_drv(adapter))
1033 			dev_err(&pdev->dev, "kzalloc failed , size = D%d\n",
1034 				size);
1035 		goto err_nomem;
1036 	}
1037 	rfd_ring->buffer_info =
1038 		(tpd_ring->buffer_info + tpd_ring->count);
1039 
1040 	/*
1041 	 * real ring DMA buffer
1042 	 * each ring/block may need up to 8 bytes for alignment, hence the
1043 	 * additional 40 bytes tacked onto the end.
1044 	 */
1045 	ring_header->size =
1046 		sizeof(struct tx_packet_desc) * tpd_ring->count
1047 		+ sizeof(struct rx_free_desc) * rfd_ring->count
1048 		+ sizeof(struct rx_return_desc) * rrd_ring->count
1049 		+ sizeof(struct coals_msg_block)
1050 		+ sizeof(struct stats_msg_block)
1051 		+ 40;
1052 
1053 	ring_header->desc = dma_alloc_coherent(&pdev->dev, ring_header->size,
1054 					       &ring_header->dma, GFP_KERNEL);
1055 	if (unlikely(!ring_header->desc)) {
1056 		if (netif_msg_drv(adapter))
1057 			dev_err(&pdev->dev, "dma_alloc_coherent failed\n");
1058 		goto err_nomem;
1059 	}
1060 
1061 	/* init TPD ring */
1062 	tpd_ring->dma = ring_header->dma;
1063 	offset = (tpd_ring->dma & 0x7) ? (8 - (ring_header->dma & 0x7)) : 0;
1064 	tpd_ring->dma += offset;
1065 	tpd_ring->desc = (u8 *) ring_header->desc + offset;
1066 	tpd_ring->size = sizeof(struct tx_packet_desc) * tpd_ring->count;
1067 
1068 	/* init RFD ring */
1069 	rfd_ring->dma = tpd_ring->dma + tpd_ring->size;
1070 	offset = (rfd_ring->dma & 0x7) ? (8 - (rfd_ring->dma & 0x7)) : 0;
1071 	rfd_ring->dma += offset;
1072 	rfd_ring->desc = (u8 *) tpd_ring->desc + (tpd_ring->size + offset);
1073 	rfd_ring->size = sizeof(struct rx_free_desc) * rfd_ring->count;
1074 
1075 
1076 	/* init RRD ring */
1077 	rrd_ring->dma = rfd_ring->dma + rfd_ring->size;
1078 	offset = (rrd_ring->dma & 0x7) ? (8 - (rrd_ring->dma & 0x7)) : 0;
1079 	rrd_ring->dma += offset;
1080 	rrd_ring->desc = (u8 *) rfd_ring->desc + (rfd_ring->size + offset);
1081 	rrd_ring->size = sizeof(struct rx_return_desc) * rrd_ring->count;
1082 
1083 
1084 	/* init CMB */
1085 	adapter->cmb.dma = rrd_ring->dma + rrd_ring->size;
1086 	offset = (adapter->cmb.dma & 0x7) ? (8 - (adapter->cmb.dma & 0x7)) : 0;
1087 	adapter->cmb.dma += offset;
1088 	adapter->cmb.cmb = (struct coals_msg_block *)
1089 		((u8 *) rrd_ring->desc + (rrd_ring->size + offset));
1090 
1091 	/* init SMB */
1092 	adapter->smb.dma = adapter->cmb.dma + sizeof(struct coals_msg_block);
1093 	offset = (adapter->smb.dma & 0x7) ? (8 - (adapter->smb.dma & 0x7)) : 0;
1094 	adapter->smb.dma += offset;
1095 	adapter->smb.smb = (struct stats_msg_block *)
1096 		((u8 *) adapter->cmb.cmb +
1097 		(sizeof(struct coals_msg_block) + offset));
1098 
1099 	return 0;
1100 
1101 err_nomem:
1102 	kfree(tpd_ring->buffer_info);
1103 	return -ENOMEM;
1104 }
1105 
atl1_init_ring_ptrs(struct atl1_adapter * adapter)1106 static void atl1_init_ring_ptrs(struct atl1_adapter *adapter)
1107 {
1108 	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1109 	struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1110 	struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1111 
1112 	atomic_set(&tpd_ring->next_to_use, 0);
1113 	atomic_set(&tpd_ring->next_to_clean, 0);
1114 
1115 	rfd_ring->next_to_clean = 0;
1116 	atomic_set(&rfd_ring->next_to_use, 0);
1117 
1118 	rrd_ring->next_to_use = 0;
1119 	atomic_set(&rrd_ring->next_to_clean, 0);
1120 }
1121 
1122 /**
1123  * atl1_clean_rx_ring - Free RFD Buffers
1124  * @adapter: board private structure
1125  */
atl1_clean_rx_ring(struct atl1_adapter * adapter)1126 static void atl1_clean_rx_ring(struct atl1_adapter *adapter)
1127 {
1128 	struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1129 	struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1130 	struct atl1_buffer *buffer_info;
1131 	struct pci_dev *pdev = adapter->pdev;
1132 	unsigned long size;
1133 	unsigned int i;
1134 
1135 	/* Free all the Rx ring sk_buffs */
1136 	for (i = 0; i < rfd_ring->count; i++) {
1137 		buffer_info = &rfd_ring->buffer_info[i];
1138 		if (buffer_info->dma) {
1139 			dma_unmap_page(&pdev->dev, buffer_info->dma,
1140 				       buffer_info->length, DMA_FROM_DEVICE);
1141 			buffer_info->dma = 0;
1142 		}
1143 		if (buffer_info->skb) {
1144 			dev_kfree_skb(buffer_info->skb);
1145 			buffer_info->skb = NULL;
1146 		}
1147 	}
1148 
1149 	size = sizeof(struct atl1_buffer) * rfd_ring->count;
1150 	memset(rfd_ring->buffer_info, 0, size);
1151 
1152 	/* Zero out the descriptor ring */
1153 	memset(rfd_ring->desc, 0, rfd_ring->size);
1154 
1155 	rfd_ring->next_to_clean = 0;
1156 	atomic_set(&rfd_ring->next_to_use, 0);
1157 
1158 	rrd_ring->next_to_use = 0;
1159 	atomic_set(&rrd_ring->next_to_clean, 0);
1160 }
1161 
1162 /**
1163  * atl1_clean_tx_ring - Free Tx Buffers
1164  * @adapter: board private structure
1165  */
atl1_clean_tx_ring(struct atl1_adapter * adapter)1166 static void atl1_clean_tx_ring(struct atl1_adapter *adapter)
1167 {
1168 	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1169 	struct atl1_buffer *buffer_info;
1170 	struct pci_dev *pdev = adapter->pdev;
1171 	unsigned long size;
1172 	unsigned int i;
1173 
1174 	/* Free all the Tx ring sk_buffs */
1175 	for (i = 0; i < tpd_ring->count; i++) {
1176 		buffer_info = &tpd_ring->buffer_info[i];
1177 		if (buffer_info->dma) {
1178 			dma_unmap_page(&pdev->dev, buffer_info->dma,
1179 				       buffer_info->length, DMA_TO_DEVICE);
1180 			buffer_info->dma = 0;
1181 		}
1182 	}
1183 
1184 	for (i = 0; i < tpd_ring->count; i++) {
1185 		buffer_info = &tpd_ring->buffer_info[i];
1186 		if (buffer_info->skb) {
1187 			dev_kfree_skb_any(buffer_info->skb);
1188 			buffer_info->skb = NULL;
1189 		}
1190 	}
1191 
1192 	size = sizeof(struct atl1_buffer) * tpd_ring->count;
1193 	memset(tpd_ring->buffer_info, 0, size);
1194 
1195 	/* Zero out the descriptor ring */
1196 	memset(tpd_ring->desc, 0, tpd_ring->size);
1197 
1198 	atomic_set(&tpd_ring->next_to_use, 0);
1199 	atomic_set(&tpd_ring->next_to_clean, 0);
1200 }
1201 
1202 /**
1203  * atl1_free_ring_resources - Free Tx / RX descriptor Resources
1204  * @adapter: board private structure
1205  *
1206  * Free all transmit software resources
1207  */
atl1_free_ring_resources(struct atl1_adapter * adapter)1208 static void atl1_free_ring_resources(struct atl1_adapter *adapter)
1209 {
1210 	struct pci_dev *pdev = adapter->pdev;
1211 	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
1212 	struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1213 	struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1214 	struct atl1_ring_header *ring_header = &adapter->ring_header;
1215 
1216 	atl1_clean_tx_ring(adapter);
1217 	atl1_clean_rx_ring(adapter);
1218 
1219 	kfree(tpd_ring->buffer_info);
1220 	dma_free_coherent(&pdev->dev, ring_header->size, ring_header->desc,
1221 			  ring_header->dma);
1222 
1223 	tpd_ring->buffer_info = NULL;
1224 	tpd_ring->desc = NULL;
1225 	tpd_ring->dma = 0;
1226 
1227 	rfd_ring->buffer_info = NULL;
1228 	rfd_ring->desc = NULL;
1229 	rfd_ring->dma = 0;
1230 
1231 	rrd_ring->desc = NULL;
1232 	rrd_ring->dma = 0;
1233 
1234 	adapter->cmb.dma = 0;
1235 	adapter->cmb.cmb = NULL;
1236 
1237 	adapter->smb.dma = 0;
1238 	adapter->smb.smb = NULL;
1239 }
1240 
atl1_setup_mac_ctrl(struct atl1_adapter * adapter)1241 static void atl1_setup_mac_ctrl(struct atl1_adapter *adapter)
1242 {
1243 	u32 value;
1244 	struct atl1_hw *hw = &adapter->hw;
1245 	struct net_device *netdev = adapter->netdev;
1246 	/* Config MAC CTRL Register */
1247 	value = MAC_CTRL_TX_EN | MAC_CTRL_RX_EN;
1248 	/* duplex */
1249 	if (FULL_DUPLEX == adapter->link_duplex)
1250 		value |= MAC_CTRL_DUPLX;
1251 	/* speed */
1252 	value |= ((u32) ((SPEED_1000 == adapter->link_speed) ?
1253 			 MAC_CTRL_SPEED_1000 : MAC_CTRL_SPEED_10_100) <<
1254 		  MAC_CTRL_SPEED_SHIFT);
1255 	/* flow control */
1256 	value |= (MAC_CTRL_TX_FLOW | MAC_CTRL_RX_FLOW);
1257 	/* PAD & CRC */
1258 	value |= (MAC_CTRL_ADD_CRC | MAC_CTRL_PAD);
1259 	/* preamble length */
1260 	value |= (((u32) adapter->hw.preamble_len
1261 		   & MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
1262 	/* vlan */
1263 	__atlx_vlan_mode(netdev->features, &value);
1264 	/* rx checksum
1265 	   if (adapter->rx_csum)
1266 	   value |= MAC_CTRL_RX_CHKSUM_EN;
1267 	 */
1268 	/* filter mode */
1269 	value |= MAC_CTRL_BC_EN;
1270 	if (netdev->flags & IFF_PROMISC)
1271 		value |= MAC_CTRL_PROMIS_EN;
1272 	else if (netdev->flags & IFF_ALLMULTI)
1273 		value |= MAC_CTRL_MC_ALL_EN;
1274 	/* value |= MAC_CTRL_LOOPBACK; */
1275 	iowrite32(value, hw->hw_addr + REG_MAC_CTRL);
1276 }
1277 
atl1_check_link(struct atl1_adapter * adapter)1278 static u32 atl1_check_link(struct atl1_adapter *adapter)
1279 {
1280 	struct atl1_hw *hw = &adapter->hw;
1281 	struct net_device *netdev = adapter->netdev;
1282 	u32 ret_val;
1283 	u16 speed, duplex, phy_data;
1284 	int reconfig = 0;
1285 
1286 	/* MII_BMSR must read twice */
1287 	atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
1288 	atl1_read_phy_reg(hw, MII_BMSR, &phy_data);
1289 	if (!(phy_data & BMSR_LSTATUS)) {
1290 		/* link down */
1291 		if (netif_carrier_ok(netdev)) {
1292 			/* old link state: Up */
1293 			if (netif_msg_link(adapter))
1294 				dev_info(&adapter->pdev->dev, "link is down\n");
1295 			adapter->link_speed = SPEED_0;
1296 			netif_carrier_off(netdev);
1297 		}
1298 		return 0;
1299 	}
1300 
1301 	/* Link Up */
1302 	ret_val = atl1_get_speed_and_duplex(hw, &speed, &duplex);
1303 	if (ret_val)
1304 		return ret_val;
1305 
1306 	switch (hw->media_type) {
1307 	case MEDIA_TYPE_1000M_FULL:
1308 		if (speed != SPEED_1000 || duplex != FULL_DUPLEX)
1309 			reconfig = 1;
1310 		break;
1311 	case MEDIA_TYPE_100M_FULL:
1312 		if (speed != SPEED_100 || duplex != FULL_DUPLEX)
1313 			reconfig = 1;
1314 		break;
1315 	case MEDIA_TYPE_100M_HALF:
1316 		if (speed != SPEED_100 || duplex != HALF_DUPLEX)
1317 			reconfig = 1;
1318 		break;
1319 	case MEDIA_TYPE_10M_FULL:
1320 		if (speed != SPEED_10 || duplex != FULL_DUPLEX)
1321 			reconfig = 1;
1322 		break;
1323 	case MEDIA_TYPE_10M_HALF:
1324 		if (speed != SPEED_10 || duplex != HALF_DUPLEX)
1325 			reconfig = 1;
1326 		break;
1327 	}
1328 
1329 	/* link result is our setting */
1330 	if (!reconfig) {
1331 		if (adapter->link_speed != speed ||
1332 		    adapter->link_duplex != duplex) {
1333 			adapter->link_speed = speed;
1334 			adapter->link_duplex = duplex;
1335 			atl1_setup_mac_ctrl(adapter);
1336 			if (netif_msg_link(adapter))
1337 				dev_info(&adapter->pdev->dev,
1338 					"%s link is up %d Mbps %s\n",
1339 					netdev->name, adapter->link_speed,
1340 					adapter->link_duplex == FULL_DUPLEX ?
1341 					"full duplex" : "half duplex");
1342 		}
1343 		if (!netif_carrier_ok(netdev)) {
1344 			/* Link down -> Up */
1345 			netif_carrier_on(netdev);
1346 		}
1347 		return 0;
1348 	}
1349 
1350 	/* change original link status */
1351 	if (netif_carrier_ok(netdev)) {
1352 		adapter->link_speed = SPEED_0;
1353 		netif_carrier_off(netdev);
1354 		netif_stop_queue(netdev);
1355 	}
1356 
1357 	if (hw->media_type != MEDIA_TYPE_AUTO_SENSOR &&
1358 	    hw->media_type != MEDIA_TYPE_1000M_FULL) {
1359 		switch (hw->media_type) {
1360 		case MEDIA_TYPE_100M_FULL:
1361 			phy_data = MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
1362 			           MII_CR_RESET;
1363 			break;
1364 		case MEDIA_TYPE_100M_HALF:
1365 			phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
1366 			break;
1367 		case MEDIA_TYPE_10M_FULL:
1368 			phy_data =
1369 			    MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
1370 			break;
1371 		default:
1372 			/* MEDIA_TYPE_10M_HALF: */
1373 			phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
1374 			break;
1375 		}
1376 		atl1_write_phy_reg(hw, MII_BMCR, phy_data);
1377 		return 0;
1378 	}
1379 
1380 	/* auto-neg, insert timer to re-config phy */
1381 	if (!adapter->phy_timer_pending) {
1382 		adapter->phy_timer_pending = true;
1383 		mod_timer(&adapter->phy_config_timer,
1384 			  round_jiffies(jiffies + 3 * HZ));
1385 	}
1386 
1387 	return 0;
1388 }
1389 
set_flow_ctrl_old(struct atl1_adapter * adapter)1390 static void set_flow_ctrl_old(struct atl1_adapter *adapter)
1391 {
1392 	u32 hi, lo, value;
1393 
1394 	/* RFD Flow Control */
1395 	value = adapter->rfd_ring.count;
1396 	hi = value / 16;
1397 	if (hi < 2)
1398 		hi = 2;
1399 	lo = value * 7 / 8;
1400 
1401 	value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
1402 		((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
1403 	iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RXF_PAUSE_THRESH);
1404 
1405 	/* RRD Flow Control */
1406 	value = adapter->rrd_ring.count;
1407 	lo = value / 16;
1408 	hi = value * 7 / 8;
1409 	if (lo < 2)
1410 		lo = 2;
1411 	value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
1412 		((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
1413 	iowrite32(value, adapter->hw.hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
1414 }
1415 
set_flow_ctrl_new(struct atl1_hw * hw)1416 static void set_flow_ctrl_new(struct atl1_hw *hw)
1417 {
1418 	u32 hi, lo, value;
1419 
1420 	/* RXF Flow Control */
1421 	value = ioread32(hw->hw_addr + REG_SRAM_RXF_LEN);
1422 	lo = value / 16;
1423 	if (lo < 192)
1424 		lo = 192;
1425 	hi = value * 7 / 8;
1426 	if (hi < lo)
1427 		hi = lo + 16;
1428 	value = ((hi & RXQ_RXF_PAUSE_TH_HI_MASK) << RXQ_RXF_PAUSE_TH_HI_SHIFT) |
1429 		((lo & RXQ_RXF_PAUSE_TH_LO_MASK) << RXQ_RXF_PAUSE_TH_LO_SHIFT);
1430 	iowrite32(value, hw->hw_addr + REG_RXQ_RXF_PAUSE_THRESH);
1431 
1432 	/* RRD Flow Control */
1433 	value = ioread32(hw->hw_addr + REG_SRAM_RRD_LEN);
1434 	lo = value / 8;
1435 	hi = value * 7 / 8;
1436 	if (lo < 2)
1437 		lo = 2;
1438 	if (hi < lo)
1439 		hi = lo + 3;
1440 	value = ((hi & RXQ_RRD_PAUSE_TH_HI_MASK) << RXQ_RRD_PAUSE_TH_HI_SHIFT) |
1441 		((lo & RXQ_RRD_PAUSE_TH_LO_MASK) << RXQ_RRD_PAUSE_TH_LO_SHIFT);
1442 	iowrite32(value, hw->hw_addr + REG_RXQ_RRD_PAUSE_THRESH);
1443 }
1444 
1445 /**
1446  * atl1_configure - Configure Transmit&Receive Unit after Reset
1447  * @adapter: board private structure
1448  *
1449  * Configure the Tx /Rx unit of the MAC after a reset.
1450  */
atl1_configure(struct atl1_adapter * adapter)1451 static u32 atl1_configure(struct atl1_adapter *adapter)
1452 {
1453 	struct atl1_hw *hw = &adapter->hw;
1454 	u32 value;
1455 
1456 	/* clear interrupt status */
1457 	iowrite32(0xffffffff, adapter->hw.hw_addr + REG_ISR);
1458 
1459 	/* set MAC Address */
1460 	value = (((u32) hw->mac_addr[2]) << 24) |
1461 		(((u32) hw->mac_addr[3]) << 16) |
1462 		(((u32) hw->mac_addr[4]) << 8) |
1463 		(((u32) hw->mac_addr[5]));
1464 	iowrite32(value, hw->hw_addr + REG_MAC_STA_ADDR);
1465 	value = (((u32) hw->mac_addr[0]) << 8) | (((u32) hw->mac_addr[1]));
1466 	iowrite32(value, hw->hw_addr + (REG_MAC_STA_ADDR + 4));
1467 
1468 	/* tx / rx ring */
1469 
1470 	/* HI base address */
1471 	iowrite32((u32) ((adapter->tpd_ring.dma & 0xffffffff00000000ULL) >> 32),
1472 		hw->hw_addr + REG_DESC_BASE_ADDR_HI);
1473 	/* LO base address */
1474 	iowrite32((u32) (adapter->rfd_ring.dma & 0x00000000ffffffffULL),
1475 		hw->hw_addr + REG_DESC_RFD_ADDR_LO);
1476 	iowrite32((u32) (adapter->rrd_ring.dma & 0x00000000ffffffffULL),
1477 		hw->hw_addr + REG_DESC_RRD_ADDR_LO);
1478 	iowrite32((u32) (adapter->tpd_ring.dma & 0x00000000ffffffffULL),
1479 		hw->hw_addr + REG_DESC_TPD_ADDR_LO);
1480 	iowrite32((u32) (adapter->cmb.dma & 0x00000000ffffffffULL),
1481 		hw->hw_addr + REG_DESC_CMB_ADDR_LO);
1482 	iowrite32((u32) (adapter->smb.dma & 0x00000000ffffffffULL),
1483 		hw->hw_addr + REG_DESC_SMB_ADDR_LO);
1484 
1485 	/* element count */
1486 	value = adapter->rrd_ring.count;
1487 	value <<= 16;
1488 	value += adapter->rfd_ring.count;
1489 	iowrite32(value, hw->hw_addr + REG_DESC_RFD_RRD_RING_SIZE);
1490 	iowrite32(adapter->tpd_ring.count, hw->hw_addr +
1491 		REG_DESC_TPD_RING_SIZE);
1492 
1493 	/* Load Ptr */
1494 	iowrite32(1, hw->hw_addr + REG_LOAD_PTR);
1495 
1496 	/* config Mailbox */
1497 	value = ((atomic_read(&adapter->tpd_ring.next_to_use)
1498 		  & MB_TPD_PROD_INDX_MASK) << MB_TPD_PROD_INDX_SHIFT) |
1499 		((atomic_read(&adapter->rrd_ring.next_to_clean)
1500 		& MB_RRD_CONS_INDX_MASK) << MB_RRD_CONS_INDX_SHIFT) |
1501 		((atomic_read(&adapter->rfd_ring.next_to_use)
1502 		& MB_RFD_PROD_INDX_MASK) << MB_RFD_PROD_INDX_SHIFT);
1503 	iowrite32(value, hw->hw_addr + REG_MAILBOX);
1504 
1505 	/* config IPG/IFG */
1506 	value = (((u32) hw->ipgt & MAC_IPG_IFG_IPGT_MASK)
1507 		 << MAC_IPG_IFG_IPGT_SHIFT) |
1508 		(((u32) hw->min_ifg & MAC_IPG_IFG_MIFG_MASK)
1509 		<< MAC_IPG_IFG_MIFG_SHIFT) |
1510 		(((u32) hw->ipgr1 & MAC_IPG_IFG_IPGR1_MASK)
1511 		<< MAC_IPG_IFG_IPGR1_SHIFT) |
1512 		(((u32) hw->ipgr2 & MAC_IPG_IFG_IPGR2_MASK)
1513 		<< MAC_IPG_IFG_IPGR2_SHIFT);
1514 	iowrite32(value, hw->hw_addr + REG_MAC_IPG_IFG);
1515 
1516 	/* config  Half-Duplex Control */
1517 	value = ((u32) hw->lcol & MAC_HALF_DUPLX_CTRL_LCOL_MASK) |
1518 		(((u32) hw->max_retry & MAC_HALF_DUPLX_CTRL_RETRY_MASK)
1519 		<< MAC_HALF_DUPLX_CTRL_RETRY_SHIFT) |
1520 		MAC_HALF_DUPLX_CTRL_EXC_DEF_EN |
1521 		(0xa << MAC_HALF_DUPLX_CTRL_ABEBT_SHIFT) |
1522 		(((u32) hw->jam_ipg & MAC_HALF_DUPLX_CTRL_JAMIPG_MASK)
1523 		<< MAC_HALF_DUPLX_CTRL_JAMIPG_SHIFT);
1524 	iowrite32(value, hw->hw_addr + REG_MAC_HALF_DUPLX_CTRL);
1525 
1526 	/* set Interrupt Moderator Timer */
1527 	iowrite16(adapter->imt, hw->hw_addr + REG_IRQ_MODU_TIMER_INIT);
1528 	iowrite32(MASTER_CTRL_ITIMER_EN, hw->hw_addr + REG_MASTER_CTRL);
1529 
1530 	/* set Interrupt Clear Timer */
1531 	iowrite16(adapter->ict, hw->hw_addr + REG_CMBDISDMA_TIMER);
1532 
1533 	/* set max frame size hw will accept */
1534 	iowrite32(hw->max_frame_size, hw->hw_addr + REG_MTU);
1535 
1536 	/* jumbo size & rrd retirement timer */
1537 	value = (((u32) hw->rx_jumbo_th & RXQ_JMBOSZ_TH_MASK)
1538 		 << RXQ_JMBOSZ_TH_SHIFT) |
1539 		(((u32) hw->rx_jumbo_lkah & RXQ_JMBO_LKAH_MASK)
1540 		<< RXQ_JMBO_LKAH_SHIFT) |
1541 		(((u32) hw->rrd_ret_timer & RXQ_RRD_TIMER_MASK)
1542 		<< RXQ_RRD_TIMER_SHIFT);
1543 	iowrite32(value, hw->hw_addr + REG_RXQ_JMBOSZ_RRDTIM);
1544 
1545 	/* Flow Control */
1546 	switch (hw->dev_rev) {
1547 	case 0x8001:
1548 	case 0x9001:
1549 	case 0x9002:
1550 	case 0x9003:
1551 		set_flow_ctrl_old(adapter);
1552 		break;
1553 	default:
1554 		set_flow_ctrl_new(hw);
1555 		break;
1556 	}
1557 
1558 	/* config TXQ */
1559 	value = (((u32) hw->tpd_burst & TXQ_CTRL_TPD_BURST_NUM_MASK)
1560 		 << TXQ_CTRL_TPD_BURST_NUM_SHIFT) |
1561 		(((u32) hw->txf_burst & TXQ_CTRL_TXF_BURST_NUM_MASK)
1562 		<< TXQ_CTRL_TXF_BURST_NUM_SHIFT) |
1563 		(((u32) hw->tpd_fetch_th & TXQ_CTRL_TPD_FETCH_TH_MASK)
1564 		<< TXQ_CTRL_TPD_FETCH_TH_SHIFT) | TXQ_CTRL_ENH_MODE |
1565 		TXQ_CTRL_EN;
1566 	iowrite32(value, hw->hw_addr + REG_TXQ_CTRL);
1567 
1568 	/* min tpd fetch gap & tx jumbo packet size threshold for taskoffload */
1569 	value = (((u32) hw->tx_jumbo_task_th & TX_JUMBO_TASK_TH_MASK)
1570 		<< TX_JUMBO_TASK_TH_SHIFT) |
1571 		(((u32) hw->tpd_fetch_gap & TX_TPD_MIN_IPG_MASK)
1572 		<< TX_TPD_MIN_IPG_SHIFT);
1573 	iowrite32(value, hw->hw_addr + REG_TX_JUMBO_TASK_TH_TPD_IPG);
1574 
1575 	/* config RXQ */
1576 	value = (((u32) hw->rfd_burst & RXQ_CTRL_RFD_BURST_NUM_MASK)
1577 		<< RXQ_CTRL_RFD_BURST_NUM_SHIFT) |
1578 		(((u32) hw->rrd_burst & RXQ_CTRL_RRD_BURST_THRESH_MASK)
1579 		<< RXQ_CTRL_RRD_BURST_THRESH_SHIFT) |
1580 		(((u32) hw->rfd_fetch_gap & RXQ_CTRL_RFD_PREF_MIN_IPG_MASK)
1581 		<< RXQ_CTRL_RFD_PREF_MIN_IPG_SHIFT) | RXQ_CTRL_CUT_THRU_EN |
1582 		RXQ_CTRL_EN;
1583 	iowrite32(value, hw->hw_addr + REG_RXQ_CTRL);
1584 
1585 	/* config DMA Engine */
1586 	value = ((((u32) hw->dmar_block) & DMA_CTRL_DMAR_BURST_LEN_MASK)
1587 		<< DMA_CTRL_DMAR_BURST_LEN_SHIFT) |
1588 		((((u32) hw->dmaw_block) & DMA_CTRL_DMAW_BURST_LEN_MASK)
1589 		<< DMA_CTRL_DMAW_BURST_LEN_SHIFT) | DMA_CTRL_DMAR_EN |
1590 		DMA_CTRL_DMAW_EN;
1591 	value |= (u32) hw->dma_ord;
1592 	if (atl1_rcb_128 == hw->rcb_value)
1593 		value |= DMA_CTRL_RCB_VALUE;
1594 	iowrite32(value, hw->hw_addr + REG_DMA_CTRL);
1595 
1596 	/* config CMB / SMB */
1597 	value = (hw->cmb_tpd > adapter->tpd_ring.count) ?
1598 		hw->cmb_tpd : adapter->tpd_ring.count;
1599 	value <<= 16;
1600 	value |= hw->cmb_rrd;
1601 	iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TH);
1602 	value = hw->cmb_rx_timer | ((u32) hw->cmb_tx_timer << 16);
1603 	iowrite32(value, hw->hw_addr + REG_CMB_WRITE_TIMER);
1604 	iowrite32(hw->smb_timer, hw->hw_addr + REG_SMB_TIMER);
1605 
1606 	/* --- enable CMB / SMB */
1607 	value = CSMB_CTRL_CMB_EN | CSMB_CTRL_SMB_EN;
1608 	iowrite32(value, hw->hw_addr + REG_CSMB_CTRL);
1609 
1610 	value = ioread32(adapter->hw.hw_addr + REG_ISR);
1611 	if (unlikely((value & ISR_PHY_LINKDOWN) != 0))
1612 		value = 1;	/* config failed */
1613 	else
1614 		value = 0;
1615 
1616 	/* clear all interrupt status */
1617 	iowrite32(0x3fffffff, adapter->hw.hw_addr + REG_ISR);
1618 	iowrite32(0, adapter->hw.hw_addr + REG_ISR);
1619 	return value;
1620 }
1621 
1622 /*
1623  * atl1_pcie_patch - Patch for PCIE module
1624  */
atl1_pcie_patch(struct atl1_adapter * adapter)1625 static void atl1_pcie_patch(struct atl1_adapter *adapter)
1626 {
1627 	u32 value;
1628 
1629 	/* much vendor magic here */
1630 	value = 0x6500;
1631 	iowrite32(value, adapter->hw.hw_addr + 0x12FC);
1632 	/* pcie flow control mode change */
1633 	value = ioread32(adapter->hw.hw_addr + 0x1008);
1634 	value |= 0x8000;
1635 	iowrite32(value, adapter->hw.hw_addr + 0x1008);
1636 }
1637 
1638 /*
1639  * When ACPI resume on some VIA MotherBoard, the Interrupt Disable bit/0x400
1640  * on PCI Command register is disable.
1641  * The function enable this bit.
1642  * Brackett, 2006/03/15
1643  */
atl1_via_workaround(struct atl1_adapter * adapter)1644 static void atl1_via_workaround(struct atl1_adapter *adapter)
1645 {
1646 	unsigned long value;
1647 
1648 	value = ioread16(adapter->hw.hw_addr + PCI_COMMAND);
1649 	if (value & PCI_COMMAND_INTX_DISABLE)
1650 		value &= ~PCI_COMMAND_INTX_DISABLE;
1651 	iowrite32(value, adapter->hw.hw_addr + PCI_COMMAND);
1652 }
1653 
atl1_inc_smb(struct atl1_adapter * adapter)1654 static void atl1_inc_smb(struct atl1_adapter *adapter)
1655 {
1656 	struct net_device *netdev = adapter->netdev;
1657 	struct stats_msg_block *smb = adapter->smb.smb;
1658 
1659 	u64 new_rx_errors = smb->rx_frag +
1660 			    smb->rx_fcs_err +
1661 			    smb->rx_len_err +
1662 			    smb->rx_sz_ov +
1663 			    smb->rx_rxf_ov +
1664 			    smb->rx_rrd_ov +
1665 			    smb->rx_align_err;
1666 	u64 new_tx_errors = smb->tx_late_col +
1667 			    smb->tx_abort_col +
1668 			    smb->tx_underrun +
1669 			    smb->tx_trunc;
1670 
1671 	/* Fill out the OS statistics structure */
1672 	adapter->soft_stats.rx_packets += smb->rx_ok + new_rx_errors;
1673 	adapter->soft_stats.tx_packets += smb->tx_ok + new_tx_errors;
1674 	adapter->soft_stats.rx_bytes += smb->rx_byte_cnt;
1675 	adapter->soft_stats.tx_bytes += smb->tx_byte_cnt;
1676 	adapter->soft_stats.multicast += smb->rx_mcast;
1677 	adapter->soft_stats.collisions += smb->tx_1_col +
1678 					  smb->tx_2_col +
1679 					  smb->tx_late_col +
1680 					  smb->tx_abort_col;
1681 
1682 	/* Rx Errors */
1683 	adapter->soft_stats.rx_errors += new_rx_errors;
1684 	adapter->soft_stats.rx_fifo_errors += smb->rx_rxf_ov;
1685 	adapter->soft_stats.rx_length_errors += smb->rx_len_err;
1686 	adapter->soft_stats.rx_crc_errors += smb->rx_fcs_err;
1687 	adapter->soft_stats.rx_frame_errors += smb->rx_align_err;
1688 
1689 	adapter->soft_stats.rx_pause += smb->rx_pause;
1690 	adapter->soft_stats.rx_rrd_ov += smb->rx_rrd_ov;
1691 	adapter->soft_stats.rx_trunc += smb->rx_sz_ov;
1692 
1693 	/* Tx Errors */
1694 	adapter->soft_stats.tx_errors += new_tx_errors;
1695 	adapter->soft_stats.tx_fifo_errors += smb->tx_underrun;
1696 	adapter->soft_stats.tx_aborted_errors += smb->tx_abort_col;
1697 	adapter->soft_stats.tx_window_errors += smb->tx_late_col;
1698 
1699 	adapter->soft_stats.excecol += smb->tx_abort_col;
1700 	adapter->soft_stats.deffer += smb->tx_defer;
1701 	adapter->soft_stats.scc += smb->tx_1_col;
1702 	adapter->soft_stats.mcc += smb->tx_2_col;
1703 	adapter->soft_stats.latecol += smb->tx_late_col;
1704 	adapter->soft_stats.tx_underrun += smb->tx_underrun;
1705 	adapter->soft_stats.tx_trunc += smb->tx_trunc;
1706 	adapter->soft_stats.tx_pause += smb->tx_pause;
1707 
1708 	netdev->stats.rx_bytes = adapter->soft_stats.rx_bytes;
1709 	netdev->stats.tx_bytes = adapter->soft_stats.tx_bytes;
1710 	netdev->stats.multicast = adapter->soft_stats.multicast;
1711 	netdev->stats.collisions = adapter->soft_stats.collisions;
1712 	netdev->stats.rx_errors = adapter->soft_stats.rx_errors;
1713 	netdev->stats.rx_length_errors =
1714 		adapter->soft_stats.rx_length_errors;
1715 	netdev->stats.rx_crc_errors = adapter->soft_stats.rx_crc_errors;
1716 	netdev->stats.rx_frame_errors =
1717 		adapter->soft_stats.rx_frame_errors;
1718 	netdev->stats.rx_fifo_errors = adapter->soft_stats.rx_fifo_errors;
1719 	netdev->stats.rx_dropped = adapter->soft_stats.rx_rrd_ov;
1720 	netdev->stats.tx_errors = adapter->soft_stats.tx_errors;
1721 	netdev->stats.tx_fifo_errors = adapter->soft_stats.tx_fifo_errors;
1722 	netdev->stats.tx_aborted_errors =
1723 		adapter->soft_stats.tx_aborted_errors;
1724 	netdev->stats.tx_window_errors =
1725 		adapter->soft_stats.tx_window_errors;
1726 	netdev->stats.tx_carrier_errors =
1727 		adapter->soft_stats.tx_carrier_errors;
1728 
1729 	netdev->stats.rx_packets = adapter->soft_stats.rx_packets;
1730 	netdev->stats.tx_packets = adapter->soft_stats.tx_packets;
1731 }
1732 
atl1_update_mailbox(struct atl1_adapter * adapter)1733 static void atl1_update_mailbox(struct atl1_adapter *adapter)
1734 {
1735 	unsigned long flags;
1736 	u32 tpd_next_to_use;
1737 	u32 rfd_next_to_use;
1738 	u32 rrd_next_to_clean;
1739 	u32 value;
1740 
1741 	spin_lock_irqsave(&adapter->mb_lock, flags);
1742 
1743 	tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
1744 	rfd_next_to_use = atomic_read(&adapter->rfd_ring.next_to_use);
1745 	rrd_next_to_clean = atomic_read(&adapter->rrd_ring.next_to_clean);
1746 
1747 	value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
1748 		MB_RFD_PROD_INDX_SHIFT) |
1749 		((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
1750 		MB_RRD_CONS_INDX_SHIFT) |
1751 		((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
1752 		MB_TPD_PROD_INDX_SHIFT);
1753 	iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
1754 
1755 	spin_unlock_irqrestore(&adapter->mb_lock, flags);
1756 }
1757 
atl1_clean_alloc_flag(struct atl1_adapter * adapter,struct rx_return_desc * rrd,u16 offset)1758 static void atl1_clean_alloc_flag(struct atl1_adapter *adapter,
1759 	struct rx_return_desc *rrd, u16 offset)
1760 {
1761 	struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1762 
1763 	while (rfd_ring->next_to_clean != (rrd->buf_indx + offset)) {
1764 		rfd_ring->buffer_info[rfd_ring->next_to_clean].alloced = 0;
1765 		if (++rfd_ring->next_to_clean == rfd_ring->count) {
1766 			rfd_ring->next_to_clean = 0;
1767 		}
1768 	}
1769 }
1770 
atl1_update_rfd_index(struct atl1_adapter * adapter,struct rx_return_desc * rrd)1771 static void atl1_update_rfd_index(struct atl1_adapter *adapter,
1772 	struct rx_return_desc *rrd)
1773 {
1774 	u16 num_buf;
1775 
1776 	num_buf = (rrd->xsz.xsum_sz.pkt_size + adapter->rx_buffer_len - 1) /
1777 		adapter->rx_buffer_len;
1778 	if (rrd->num_buf == num_buf)
1779 		/* clean alloc flag for bad rrd */
1780 		atl1_clean_alloc_flag(adapter, rrd, num_buf);
1781 }
1782 
atl1_rx_checksum(struct atl1_adapter * adapter,struct rx_return_desc * rrd,struct sk_buff * skb)1783 static void atl1_rx_checksum(struct atl1_adapter *adapter,
1784 	struct rx_return_desc *rrd, struct sk_buff *skb)
1785 {
1786 	struct pci_dev *pdev = adapter->pdev;
1787 
1788 	/*
1789 	 * The L1 hardware contains a bug that erroneously sets the
1790 	 * PACKET_FLAG_ERR and ERR_FLAG_L4_CHKSUM bits whenever a
1791 	 * fragmented IP packet is received, even though the packet
1792 	 * is perfectly valid and its checksum is correct. There's
1793 	 * no way to distinguish between one of these good packets
1794 	 * and a packet that actually contains a TCP/UDP checksum
1795 	 * error, so all we can do is allow it to be handed up to
1796 	 * the higher layers and let it be sorted out there.
1797 	 */
1798 
1799 	skb_checksum_none_assert(skb);
1800 
1801 	if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
1802 		if (rrd->err_flg & (ERR_FLAG_CRC | ERR_FLAG_TRUNC |
1803 					ERR_FLAG_CODE | ERR_FLAG_OV)) {
1804 			adapter->hw_csum_err++;
1805 			if (netif_msg_rx_err(adapter))
1806 				dev_printk(KERN_DEBUG, &pdev->dev,
1807 					"rx checksum error\n");
1808 			return;
1809 		}
1810 	}
1811 
1812 	/* not IPv4 */
1813 	if (!(rrd->pkt_flg & PACKET_FLAG_IPV4))
1814 		/* checksum is invalid, but it's not an IPv4 pkt, so ok */
1815 		return;
1816 
1817 	/* IPv4 packet */
1818 	if (likely(!(rrd->err_flg &
1819 		(ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM)))) {
1820 		skb->ip_summed = CHECKSUM_UNNECESSARY;
1821 		adapter->hw_csum_good++;
1822 		return;
1823 	}
1824 }
1825 
1826 /**
1827  * atl1_alloc_rx_buffers - Replace used receive buffers
1828  * @adapter: address of board private structure
1829  */
atl1_alloc_rx_buffers(struct atl1_adapter * adapter)1830 static u16 atl1_alloc_rx_buffers(struct atl1_adapter *adapter)
1831 {
1832 	struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1833 	struct pci_dev *pdev = adapter->pdev;
1834 	struct page *page;
1835 	unsigned long offset;
1836 	struct atl1_buffer *buffer_info, *next_info;
1837 	struct sk_buff *skb;
1838 	u16 num_alloc = 0;
1839 	u16 rfd_next_to_use, next_next;
1840 	struct rx_free_desc *rfd_desc;
1841 
1842 	next_next = rfd_next_to_use = atomic_read(&rfd_ring->next_to_use);
1843 	if (++next_next == rfd_ring->count)
1844 		next_next = 0;
1845 	buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1846 	next_info = &rfd_ring->buffer_info[next_next];
1847 
1848 	while (!buffer_info->alloced && !next_info->alloced) {
1849 		if (buffer_info->skb) {
1850 			buffer_info->alloced = 1;
1851 			goto next;
1852 		}
1853 
1854 		rfd_desc = ATL1_RFD_DESC(rfd_ring, rfd_next_to_use);
1855 
1856 		skb = netdev_alloc_skb_ip_align(adapter->netdev,
1857 						adapter->rx_buffer_len);
1858 		if (unlikely(!skb)) {
1859 			/* Better luck next round */
1860 			adapter->soft_stats.rx_dropped++;
1861 			break;
1862 		}
1863 
1864 		buffer_info->alloced = 1;
1865 		buffer_info->skb = skb;
1866 		buffer_info->length = (u16) adapter->rx_buffer_len;
1867 		page = virt_to_page(skb->data);
1868 		offset = offset_in_page(skb->data);
1869 		buffer_info->dma = dma_map_page(&pdev->dev, page, offset,
1870 						adapter->rx_buffer_len,
1871 						DMA_FROM_DEVICE);
1872 		rfd_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
1873 		rfd_desc->buf_len = cpu_to_le16(adapter->rx_buffer_len);
1874 		rfd_desc->coalese = 0;
1875 
1876 next:
1877 		rfd_next_to_use = next_next;
1878 		if (unlikely(++next_next == rfd_ring->count))
1879 			next_next = 0;
1880 
1881 		buffer_info = &rfd_ring->buffer_info[rfd_next_to_use];
1882 		next_info = &rfd_ring->buffer_info[next_next];
1883 		num_alloc++;
1884 	}
1885 
1886 	if (num_alloc) {
1887 		/*
1888 		 * Force memory writes to complete before letting h/w
1889 		 * know there are new descriptors to fetch.  (Only
1890 		 * applicable for weak-ordered memory model archs,
1891 		 * such as IA-64).
1892 		 */
1893 		wmb();
1894 		atomic_set(&rfd_ring->next_to_use, (int)rfd_next_to_use);
1895 	}
1896 	return num_alloc;
1897 }
1898 
atl1_intr_rx(struct atl1_adapter * adapter,int budget)1899 static int atl1_intr_rx(struct atl1_adapter *adapter, int budget)
1900 {
1901 	int i, count;
1902 	u16 length;
1903 	u16 rrd_next_to_clean;
1904 	u32 value;
1905 	struct atl1_rfd_ring *rfd_ring = &adapter->rfd_ring;
1906 	struct atl1_rrd_ring *rrd_ring = &adapter->rrd_ring;
1907 	struct atl1_buffer *buffer_info;
1908 	struct rx_return_desc *rrd;
1909 	struct sk_buff *skb;
1910 
1911 	count = 0;
1912 
1913 	rrd_next_to_clean = atomic_read(&rrd_ring->next_to_clean);
1914 
1915 	while (count < budget) {
1916 		rrd = ATL1_RRD_DESC(rrd_ring, rrd_next_to_clean);
1917 		i = 1;
1918 		if (likely(rrd->xsz.valid)) {	/* packet valid */
1919 chk_rrd:
1920 			/* check rrd status */
1921 			if (likely(rrd->num_buf == 1))
1922 				goto rrd_ok;
1923 			else if (netif_msg_rx_err(adapter)) {
1924 				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1925 					"unexpected RRD buffer count\n");
1926 				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1927 					"rx_buf_len = %d\n",
1928 					adapter->rx_buffer_len);
1929 				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1930 					"RRD num_buf = %d\n",
1931 					rrd->num_buf);
1932 				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1933 					"RRD pkt_len = %d\n",
1934 					rrd->xsz.xsum_sz.pkt_size);
1935 				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1936 					"RRD pkt_flg = 0x%08X\n",
1937 					rrd->pkt_flg);
1938 				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1939 					"RRD err_flg = 0x%08X\n",
1940 					rrd->err_flg);
1941 				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1942 					"RRD vlan_tag = 0x%08X\n",
1943 					rrd->vlan_tag);
1944 			}
1945 
1946 			/* rrd seems to be bad */
1947 			if (unlikely(i-- > 0)) {
1948 				/* rrd may not be DMAed completely */
1949 				udelay(1);
1950 				goto chk_rrd;
1951 			}
1952 			/* bad rrd */
1953 			if (netif_msg_rx_err(adapter))
1954 				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
1955 					"bad RRD\n");
1956 			/* see if update RFD index */
1957 			if (rrd->num_buf > 1)
1958 				atl1_update_rfd_index(adapter, rrd);
1959 
1960 			/* update rrd */
1961 			rrd->xsz.valid = 0;
1962 			if (++rrd_next_to_clean == rrd_ring->count)
1963 				rrd_next_to_clean = 0;
1964 			count++;
1965 			continue;
1966 		} else {	/* current rrd still not be updated */
1967 
1968 			break;
1969 		}
1970 rrd_ok:
1971 		/* clean alloc flag for bad rrd */
1972 		atl1_clean_alloc_flag(adapter, rrd, 0);
1973 
1974 		buffer_info = &rfd_ring->buffer_info[rrd->buf_indx];
1975 		if (++rfd_ring->next_to_clean == rfd_ring->count)
1976 			rfd_ring->next_to_clean = 0;
1977 
1978 		/* update rrd next to clean */
1979 		if (++rrd_next_to_clean == rrd_ring->count)
1980 			rrd_next_to_clean = 0;
1981 		count++;
1982 
1983 		if (unlikely(rrd->pkt_flg & PACKET_FLAG_ERR)) {
1984 			if (!(rrd->err_flg &
1985 				(ERR_FLAG_IP_CHKSUM | ERR_FLAG_L4_CHKSUM
1986 				| ERR_FLAG_LEN))) {
1987 				/* packet error, don't need upstream */
1988 				buffer_info->alloced = 0;
1989 				rrd->xsz.valid = 0;
1990 				continue;
1991 			}
1992 		}
1993 
1994 		/* Good Receive */
1995 		dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1996 			       buffer_info->length, DMA_FROM_DEVICE);
1997 		buffer_info->dma = 0;
1998 		skb = buffer_info->skb;
1999 		length = le16_to_cpu(rrd->xsz.xsum_sz.pkt_size);
2000 
2001 		skb_put(skb, length - ETH_FCS_LEN);
2002 
2003 		/* Receive Checksum Offload */
2004 		atl1_rx_checksum(adapter, rrd, skb);
2005 		skb->protocol = eth_type_trans(skb, adapter->netdev);
2006 
2007 		if (rrd->pkt_flg & PACKET_FLAG_VLAN_INS) {
2008 			u16 vlan_tag = (rrd->vlan_tag >> 4) |
2009 					((rrd->vlan_tag & 7) << 13) |
2010 					((rrd->vlan_tag & 8) << 9);
2011 
2012 			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag);
2013 		}
2014 		netif_receive_skb(skb);
2015 
2016 		/* let protocol layer free skb */
2017 		buffer_info->skb = NULL;
2018 		buffer_info->alloced = 0;
2019 		rrd->xsz.valid = 0;
2020 	}
2021 
2022 	atomic_set(&rrd_ring->next_to_clean, rrd_next_to_clean);
2023 
2024 	atl1_alloc_rx_buffers(adapter);
2025 
2026 	/* update mailbox ? */
2027 	if (count) {
2028 		u32 tpd_next_to_use;
2029 		u32 rfd_next_to_use;
2030 
2031 		spin_lock(&adapter->mb_lock);
2032 
2033 		tpd_next_to_use = atomic_read(&adapter->tpd_ring.next_to_use);
2034 		rfd_next_to_use =
2035 		    atomic_read(&adapter->rfd_ring.next_to_use);
2036 		rrd_next_to_clean =
2037 		    atomic_read(&adapter->rrd_ring.next_to_clean);
2038 		value = ((rfd_next_to_use & MB_RFD_PROD_INDX_MASK) <<
2039 			MB_RFD_PROD_INDX_SHIFT) |
2040                         ((rrd_next_to_clean & MB_RRD_CONS_INDX_MASK) <<
2041 			MB_RRD_CONS_INDX_SHIFT) |
2042                         ((tpd_next_to_use & MB_TPD_PROD_INDX_MASK) <<
2043 			MB_TPD_PROD_INDX_SHIFT);
2044 		iowrite32(value, adapter->hw.hw_addr + REG_MAILBOX);
2045 		spin_unlock(&adapter->mb_lock);
2046 	}
2047 
2048 	return count;
2049 }
2050 
atl1_intr_tx(struct atl1_adapter * adapter)2051 static int atl1_intr_tx(struct atl1_adapter *adapter)
2052 {
2053 	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
2054 	struct atl1_buffer *buffer_info;
2055 	u16 sw_tpd_next_to_clean;
2056 	u16 cmb_tpd_next_to_clean;
2057 	int count = 0;
2058 
2059 	sw_tpd_next_to_clean = atomic_read(&tpd_ring->next_to_clean);
2060 	cmb_tpd_next_to_clean = le16_to_cpu(adapter->cmb.cmb->tpd_cons_idx);
2061 
2062 	while (cmb_tpd_next_to_clean != sw_tpd_next_to_clean) {
2063 		buffer_info = &tpd_ring->buffer_info[sw_tpd_next_to_clean];
2064 		if (buffer_info->dma) {
2065 			dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
2066 				       buffer_info->length, DMA_TO_DEVICE);
2067 			buffer_info->dma = 0;
2068 		}
2069 
2070 		if (buffer_info->skb) {
2071 			dev_consume_skb_irq(buffer_info->skb);
2072 			buffer_info->skb = NULL;
2073 		}
2074 
2075 		if (++sw_tpd_next_to_clean == tpd_ring->count)
2076 			sw_tpd_next_to_clean = 0;
2077 
2078 		count++;
2079 	}
2080 	atomic_set(&tpd_ring->next_to_clean, sw_tpd_next_to_clean);
2081 
2082 	if (netif_queue_stopped(adapter->netdev) &&
2083 	    netif_carrier_ok(adapter->netdev))
2084 		netif_wake_queue(adapter->netdev);
2085 
2086 	return count;
2087 }
2088 
atl1_tpd_avail(struct atl1_tpd_ring * tpd_ring)2089 static u16 atl1_tpd_avail(struct atl1_tpd_ring *tpd_ring)
2090 {
2091 	u16 next_to_clean = atomic_read(&tpd_ring->next_to_clean);
2092 	u16 next_to_use = atomic_read(&tpd_ring->next_to_use);
2093 	return (next_to_clean > next_to_use) ?
2094 		next_to_clean - next_to_use - 1 :
2095 		tpd_ring->count + next_to_clean - next_to_use - 1;
2096 }
2097 
atl1_tso(struct atl1_adapter * adapter,struct sk_buff * skb,struct tx_packet_desc * ptpd)2098 static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
2099 		    struct tx_packet_desc *ptpd)
2100 {
2101 	u8 hdr_len, ip_off;
2102 	u32 real_len;
2103 
2104 	if (skb_shinfo(skb)->gso_size) {
2105 		int err;
2106 
2107 		err = skb_cow_head(skb, 0);
2108 		if (err < 0)
2109 			return err;
2110 
2111 		if (skb->protocol == htons(ETH_P_IP)) {
2112 			struct iphdr *iph = ip_hdr(skb);
2113 
2114 			real_len = (((unsigned char *)iph - skb->data) +
2115 				ntohs(iph->tot_len));
2116 			if (real_len < skb->len) {
2117 				err = pskb_trim(skb, real_len);
2118 				if (err)
2119 					return err;
2120 			}
2121 			hdr_len = skb_tcp_all_headers(skb);
2122 			if (skb->len == hdr_len) {
2123 				iph->check = 0;
2124 				tcp_hdr(skb)->check =
2125 					~csum_tcpudp_magic(iph->saddr,
2126 					iph->daddr, tcp_hdrlen(skb),
2127 					IPPROTO_TCP, 0);
2128 				ptpd->word3 |= (iph->ihl & TPD_IPHL_MASK) <<
2129 					TPD_IPHL_SHIFT;
2130 				ptpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
2131 					TPD_TCPHDRLEN_MASK) <<
2132 					TPD_TCPHDRLEN_SHIFT;
2133 				ptpd->word3 |= 1 << TPD_IP_CSUM_SHIFT;
2134 				ptpd->word3 |= 1 << TPD_TCP_CSUM_SHIFT;
2135 				return 1;
2136 			}
2137 
2138 			iph->check = 0;
2139 			tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2140 					iph->daddr, 0, IPPROTO_TCP, 0);
2141 			ip_off = (unsigned char *)iph -
2142 				(unsigned char *) skb_network_header(skb);
2143 			if (ip_off == 8) /* 802.3-SNAP frame */
2144 				ptpd->word3 |= 1 << TPD_ETHTYPE_SHIFT;
2145 			else if (ip_off != 0)
2146 				return -2;
2147 
2148 			ptpd->word3 |= (iph->ihl & TPD_IPHL_MASK) <<
2149 				TPD_IPHL_SHIFT;
2150 			ptpd->word3 |= ((tcp_hdrlen(skb) >> 2) &
2151 				TPD_TCPHDRLEN_MASK) << TPD_TCPHDRLEN_SHIFT;
2152 			ptpd->word3 |= (skb_shinfo(skb)->gso_size &
2153 				TPD_MSS_MASK) << TPD_MSS_SHIFT;
2154 			ptpd->word3 |= 1 << TPD_SEGMENT_EN_SHIFT;
2155 			return 3;
2156 		}
2157 	}
2158 	return 0;
2159 }
2160 
atl1_tx_csum(struct atl1_adapter * adapter,struct sk_buff * skb,struct tx_packet_desc * ptpd)2161 static int atl1_tx_csum(struct atl1_adapter *adapter, struct sk_buff *skb,
2162 	struct tx_packet_desc *ptpd)
2163 {
2164 	u8 css, cso;
2165 
2166 	if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
2167 		css = skb_checksum_start_offset(skb);
2168 		cso = css + (u8) skb->csum_offset;
2169 		if (unlikely(css & 0x1)) {
2170 			/* L1 hardware requires an even number here */
2171 			if (netif_msg_tx_err(adapter))
2172 				dev_printk(KERN_DEBUG, &adapter->pdev->dev,
2173 					"payload offset not an even number\n");
2174 			return -1;
2175 		}
2176 		ptpd->word3 |= (css & TPD_PLOADOFFSET_MASK) <<
2177 			TPD_PLOADOFFSET_SHIFT;
2178 		ptpd->word3 |= (cso & TPD_CCSUMOFFSET_MASK) <<
2179 			TPD_CCSUMOFFSET_SHIFT;
2180 		ptpd->word3 |= 1 << TPD_CUST_CSUM_EN_SHIFT;
2181 		return true;
2182 	}
2183 	return 0;
2184 }
2185 
atl1_tx_map(struct atl1_adapter * adapter,struct sk_buff * skb,struct tx_packet_desc * ptpd)2186 static void atl1_tx_map(struct atl1_adapter *adapter, struct sk_buff *skb,
2187 	struct tx_packet_desc *ptpd)
2188 {
2189 	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
2190 	struct atl1_buffer *buffer_info;
2191 	u16 buf_len = skb->len;
2192 	struct page *page;
2193 	unsigned long offset;
2194 	unsigned int nr_frags;
2195 	unsigned int f;
2196 	int retval;
2197 	u16 next_to_use;
2198 	u16 data_len;
2199 	u8 hdr_len;
2200 
2201 	buf_len -= skb->data_len;
2202 	nr_frags = skb_shinfo(skb)->nr_frags;
2203 	next_to_use = atomic_read(&tpd_ring->next_to_use);
2204 	buffer_info = &tpd_ring->buffer_info[next_to_use];
2205 	BUG_ON(buffer_info->skb);
2206 	/* put skb in last TPD */
2207 	buffer_info->skb = NULL;
2208 
2209 	retval = (ptpd->word3 >> TPD_SEGMENT_EN_SHIFT) & TPD_SEGMENT_EN_MASK;
2210 	if (retval) {
2211 		/* TSO */
2212 		hdr_len = skb_tcp_all_headers(skb);
2213 		buffer_info->length = hdr_len;
2214 		page = virt_to_page(skb->data);
2215 		offset = offset_in_page(skb->data);
2216 		buffer_info->dma = dma_map_page(&adapter->pdev->dev, page,
2217 						offset, hdr_len,
2218 						DMA_TO_DEVICE);
2219 
2220 		if (++next_to_use == tpd_ring->count)
2221 			next_to_use = 0;
2222 
2223 		if (buf_len > hdr_len) {
2224 			int i, nseg;
2225 
2226 			data_len = buf_len - hdr_len;
2227 			nseg = (data_len + ATL1_MAX_TX_BUF_LEN - 1) /
2228 				ATL1_MAX_TX_BUF_LEN;
2229 			for (i = 0; i < nseg; i++) {
2230 				buffer_info =
2231 				    &tpd_ring->buffer_info[next_to_use];
2232 				buffer_info->skb = NULL;
2233 				buffer_info->length =
2234 				    (ATL1_MAX_TX_BUF_LEN >=
2235 				     data_len) ? ATL1_MAX_TX_BUF_LEN : data_len;
2236 				data_len -= buffer_info->length;
2237 				page = virt_to_page(skb->data +
2238 					(hdr_len + i * ATL1_MAX_TX_BUF_LEN));
2239 				offset = offset_in_page(skb->data +
2240 					(hdr_len + i * ATL1_MAX_TX_BUF_LEN));
2241 				buffer_info->dma = dma_map_page(&adapter->pdev->dev,
2242 								page, offset,
2243 								buffer_info->length,
2244 								DMA_TO_DEVICE);
2245 				if (++next_to_use == tpd_ring->count)
2246 					next_to_use = 0;
2247 			}
2248 		}
2249 	} else {
2250 		/* not TSO */
2251 		buffer_info->length = buf_len;
2252 		page = virt_to_page(skb->data);
2253 		offset = offset_in_page(skb->data);
2254 		buffer_info->dma = dma_map_page(&adapter->pdev->dev, page,
2255 						offset, buf_len,
2256 						DMA_TO_DEVICE);
2257 		if (++next_to_use == tpd_ring->count)
2258 			next_to_use = 0;
2259 	}
2260 
2261 	for (f = 0; f < nr_frags; f++) {
2262 		const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
2263 		u16 i, nseg;
2264 
2265 		buf_len = skb_frag_size(frag);
2266 
2267 		nseg = (buf_len + ATL1_MAX_TX_BUF_LEN - 1) /
2268 			ATL1_MAX_TX_BUF_LEN;
2269 		for (i = 0; i < nseg; i++) {
2270 			buffer_info = &tpd_ring->buffer_info[next_to_use];
2271 			BUG_ON(buffer_info->skb);
2272 
2273 			buffer_info->skb = NULL;
2274 			buffer_info->length = (buf_len > ATL1_MAX_TX_BUF_LEN) ?
2275 				ATL1_MAX_TX_BUF_LEN : buf_len;
2276 			buf_len -= buffer_info->length;
2277 			buffer_info->dma = skb_frag_dma_map(&adapter->pdev->dev,
2278 				frag, i * ATL1_MAX_TX_BUF_LEN,
2279 				buffer_info->length, DMA_TO_DEVICE);
2280 
2281 			if (++next_to_use == tpd_ring->count)
2282 				next_to_use = 0;
2283 		}
2284 	}
2285 
2286 	/* last tpd's buffer-info */
2287 	buffer_info->skb = skb;
2288 }
2289 
atl1_tx_queue(struct atl1_adapter * adapter,u16 count,struct tx_packet_desc * ptpd)2290 static void atl1_tx_queue(struct atl1_adapter *adapter, u16 count,
2291        struct tx_packet_desc *ptpd)
2292 {
2293 	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
2294 	struct atl1_buffer *buffer_info;
2295 	struct tx_packet_desc *tpd;
2296 	u16 j;
2297 	u32 val;
2298 	u16 next_to_use = (u16) atomic_read(&tpd_ring->next_to_use);
2299 
2300 	for (j = 0; j < count; j++) {
2301 		buffer_info = &tpd_ring->buffer_info[next_to_use];
2302 		tpd = ATL1_TPD_DESC(&adapter->tpd_ring, next_to_use);
2303 		if (tpd != ptpd)
2304 			memcpy(tpd, ptpd, sizeof(struct tx_packet_desc));
2305 		tpd->buffer_addr = cpu_to_le64(buffer_info->dma);
2306 		tpd->word2 &= ~(TPD_BUFLEN_MASK << TPD_BUFLEN_SHIFT);
2307 		tpd->word2 |= (cpu_to_le16(buffer_info->length) &
2308 			TPD_BUFLEN_MASK) << TPD_BUFLEN_SHIFT;
2309 
2310 		/*
2311 		 * if this is the first packet in a TSO chain, set
2312 		 * TPD_HDRFLAG, otherwise, clear it.
2313 		 */
2314 		val = (tpd->word3 >> TPD_SEGMENT_EN_SHIFT) &
2315 			TPD_SEGMENT_EN_MASK;
2316 		if (val) {
2317 			if (!j)
2318 				tpd->word3 |= 1 << TPD_HDRFLAG_SHIFT;
2319 			else
2320 				tpd->word3 &= ~(1 << TPD_HDRFLAG_SHIFT);
2321 		}
2322 
2323 		if (j == (count - 1))
2324 			tpd->word3 |= 1 << TPD_EOP_SHIFT;
2325 
2326 		if (++next_to_use == tpd_ring->count)
2327 			next_to_use = 0;
2328 	}
2329 	/*
2330 	 * Force memory writes to complete before letting h/w
2331 	 * know there are new descriptors to fetch.  (Only
2332 	 * applicable for weak-ordered memory model archs,
2333 	 * such as IA-64).
2334 	 */
2335 	wmb();
2336 
2337 	atomic_set(&tpd_ring->next_to_use, next_to_use);
2338 }
2339 
atl1_xmit_frame(struct sk_buff * skb,struct net_device * netdev)2340 static netdev_tx_t atl1_xmit_frame(struct sk_buff *skb,
2341 					 struct net_device *netdev)
2342 {
2343 	struct atl1_adapter *adapter = netdev_priv(netdev);
2344 	struct atl1_tpd_ring *tpd_ring = &adapter->tpd_ring;
2345 	int len;
2346 	int tso;
2347 	int count = 1;
2348 	int ret_val;
2349 	struct tx_packet_desc *ptpd;
2350 	u16 vlan_tag;
2351 	unsigned int nr_frags = 0;
2352 	unsigned int mss = 0;
2353 	unsigned int f;
2354 	unsigned int proto_hdr_len;
2355 
2356 	len = skb_headlen(skb);
2357 
2358 	if (unlikely(skb->len <= 0)) {
2359 		dev_kfree_skb_any(skb);
2360 		return NETDEV_TX_OK;
2361 	}
2362 
2363 	nr_frags = skb_shinfo(skb)->nr_frags;
2364 	for (f = 0; f < nr_frags; f++) {
2365 		unsigned int f_size = skb_frag_size(&skb_shinfo(skb)->frags[f]);
2366 		count += (f_size + ATL1_MAX_TX_BUF_LEN - 1) /
2367 			 ATL1_MAX_TX_BUF_LEN;
2368 	}
2369 
2370 	mss = skb_shinfo(skb)->gso_size;
2371 	if (mss) {
2372 		if (skb->protocol == htons(ETH_P_IP)) {
2373 			proto_hdr_len = skb_tcp_all_headers(skb);
2374 			if (unlikely(proto_hdr_len > len)) {
2375 				dev_kfree_skb_any(skb);
2376 				return NETDEV_TX_OK;
2377 			}
2378 			/* need additional TPD ? */
2379 			if (proto_hdr_len != len)
2380 				count += (len - proto_hdr_len +
2381 					ATL1_MAX_TX_BUF_LEN - 1) /
2382 					ATL1_MAX_TX_BUF_LEN;
2383 		}
2384 	}
2385 
2386 	if (atl1_tpd_avail(&adapter->tpd_ring) < count) {
2387 		/* not enough descriptors */
2388 		netif_stop_queue(netdev);
2389 		if (netif_msg_tx_queued(adapter))
2390 			dev_printk(KERN_DEBUG, &adapter->pdev->dev,
2391 				"tx busy\n");
2392 		return NETDEV_TX_BUSY;
2393 	}
2394 
2395 	ptpd = ATL1_TPD_DESC(tpd_ring,
2396 		(u16) atomic_read(&tpd_ring->next_to_use));
2397 	memset(ptpd, 0, sizeof(struct tx_packet_desc));
2398 
2399 	if (skb_vlan_tag_present(skb)) {
2400 		vlan_tag = skb_vlan_tag_get(skb);
2401 		vlan_tag = (vlan_tag << 4) | (vlan_tag >> 13) |
2402 			((vlan_tag >> 9) & 0x8);
2403 		ptpd->word3 |= 1 << TPD_INS_VL_TAG_SHIFT;
2404 		ptpd->word2 |= (vlan_tag & TPD_VLANTAG_MASK) <<
2405 			TPD_VLANTAG_SHIFT;
2406 	}
2407 
2408 	tso = atl1_tso(adapter, skb, ptpd);
2409 	if (tso < 0) {
2410 		dev_kfree_skb_any(skb);
2411 		return NETDEV_TX_OK;
2412 	}
2413 
2414 	if (!tso) {
2415 		ret_val = atl1_tx_csum(adapter, skb, ptpd);
2416 		if (ret_val < 0) {
2417 			dev_kfree_skb_any(skb);
2418 			return NETDEV_TX_OK;
2419 		}
2420 	}
2421 
2422 	atl1_tx_map(adapter, skb, ptpd);
2423 	atl1_tx_queue(adapter, count, ptpd);
2424 	atl1_update_mailbox(adapter);
2425 	return NETDEV_TX_OK;
2426 }
2427 
atl1_rings_clean(struct napi_struct * napi,int budget)2428 static int atl1_rings_clean(struct napi_struct *napi, int budget)
2429 {
2430 	struct atl1_adapter *adapter = container_of(napi, struct atl1_adapter, napi);
2431 	int work_done = atl1_intr_rx(adapter, budget);
2432 
2433 	if (atl1_intr_tx(adapter))
2434 		work_done = budget;
2435 
2436 	/* Let's come again to process some more packets */
2437 	if (work_done >= budget)
2438 		return work_done;
2439 
2440 	napi_complete_done(napi, work_done);
2441 	/* re-enable Interrupt */
2442 	if (likely(adapter->int_enabled))
2443 		atlx_imr_set(adapter, IMR_NORMAL_MASK);
2444 	return work_done;
2445 }
2446 
atl1_sched_rings_clean(struct atl1_adapter * adapter)2447 static inline int atl1_sched_rings_clean(struct atl1_adapter* adapter)
2448 {
2449 	if (!napi_schedule(&adapter->napi))
2450 		/* It is possible in case even the RX/TX ints are disabled via IMR
2451 		 * register the ISR bits are set anyway (but do not produce IRQ).
2452 		 * To handle such situation the napi functions used to check is
2453 		 * something scheduled or not.
2454 		 */
2455 		return 0;
2456 
2457 	/*
2458 	 * Disable RX/TX ints via IMR register if it is
2459 	 * allowed. NAPI handler must reenable them in same
2460 	 * way.
2461 	 */
2462 	if (!adapter->int_enabled)
2463 		return 1;
2464 
2465 	atlx_imr_set(adapter, IMR_NORXTX_MASK);
2466 	return 1;
2467 }
2468 
2469 /**
2470  * atl1_intr - Interrupt Handler
2471  * @irq: interrupt number
2472  * @data: pointer to a network interface device structure
2473  */
atl1_intr(int irq,void * data)2474 static irqreturn_t atl1_intr(int irq, void *data)
2475 {
2476 	struct atl1_adapter *adapter = netdev_priv(data);
2477 	u32 status;
2478 
2479 	status = adapter->cmb.cmb->int_stats;
2480 	if (!status)
2481 		return IRQ_NONE;
2482 
2483 	/* clear CMB interrupt status at once,
2484 	 * but leave rx/tx interrupt status in case it should be dropped
2485 	 * only if rx/tx processing queued. In other case interrupt
2486 	 * can be lost.
2487 	 */
2488 	adapter->cmb.cmb->int_stats = status & (ISR_CMB_TX | ISR_CMB_RX);
2489 
2490 	if (status & ISR_GPHY)	/* clear phy status */
2491 		atlx_clear_phy_int(adapter);
2492 
2493 	/* clear ISR status, and Enable CMB DMA/Disable Interrupt */
2494 	iowrite32(status | ISR_DIS_INT, adapter->hw.hw_addr + REG_ISR);
2495 
2496 	/* check if SMB intr */
2497 	if (status & ISR_SMB)
2498 		atl1_inc_smb(adapter);
2499 
2500 	/* check if PCIE PHY Link down */
2501 	if (status & ISR_PHY_LINKDOWN) {
2502 		if (netif_msg_intr(adapter))
2503 			dev_printk(KERN_DEBUG, &adapter->pdev->dev,
2504 				"pcie phy link down %x\n", status);
2505 		if (netif_running(adapter->netdev)) {	/* reset MAC */
2506 			atlx_irq_disable(adapter);
2507 			schedule_work(&adapter->reset_dev_task);
2508 			return IRQ_HANDLED;
2509 		}
2510 	}
2511 
2512 	/* check if DMA read/write error ? */
2513 	if (status & (ISR_DMAR_TO_RST | ISR_DMAW_TO_RST)) {
2514 		if (netif_msg_intr(adapter))
2515 			dev_printk(KERN_DEBUG, &adapter->pdev->dev,
2516 				"pcie DMA r/w error (status = 0x%x)\n",
2517 				status);
2518 		atlx_irq_disable(adapter);
2519 		schedule_work(&adapter->reset_dev_task);
2520 		return IRQ_HANDLED;
2521 	}
2522 
2523 	/* link event */
2524 	if (status & ISR_GPHY) {
2525 		adapter->soft_stats.tx_carrier_errors++;
2526 		atl1_check_for_link(adapter);
2527 	}
2528 
2529 	/* transmit or receive event */
2530 	if (status & (ISR_CMB_TX | ISR_CMB_RX) &&
2531 	    atl1_sched_rings_clean(adapter))
2532 		adapter->cmb.cmb->int_stats = adapter->cmb.cmb->int_stats &
2533 					      ~(ISR_CMB_TX | ISR_CMB_RX);
2534 
2535 	/* rx exception */
2536 	if (unlikely(status & (ISR_RXF_OV | ISR_RFD_UNRUN |
2537 		ISR_RRD_OV | ISR_HOST_RFD_UNRUN |
2538 		ISR_HOST_RRD_OV))) {
2539 		if (netif_msg_intr(adapter))
2540 			dev_printk(KERN_DEBUG,
2541 				&adapter->pdev->dev,
2542 				"rx exception, ISR = 0x%x\n",
2543 				status);
2544 		atl1_sched_rings_clean(adapter);
2545 	}
2546 
2547 	/* re-enable Interrupt */
2548 	iowrite32(ISR_DIS_SMB | ISR_DIS_DMA, adapter->hw.hw_addr + REG_ISR);
2549 	return IRQ_HANDLED;
2550 }
2551 
2552 
2553 /**
2554  * atl1_phy_config - Timer Call-back
2555  * @t: timer_list containing pointer to netdev cast into an unsigned long
2556  */
atl1_phy_config(struct timer_list * t)2557 static void atl1_phy_config(struct timer_list *t)
2558 {
2559 	struct atl1_adapter *adapter = from_timer(adapter, t,
2560 						  phy_config_timer);
2561 	struct atl1_hw *hw = &adapter->hw;
2562 	unsigned long flags;
2563 
2564 	spin_lock_irqsave(&adapter->lock, flags);
2565 	adapter->phy_timer_pending = false;
2566 	atl1_write_phy_reg(hw, MII_ADVERTISE, hw->mii_autoneg_adv_reg);
2567 	atl1_write_phy_reg(hw, MII_ATLX_CR, hw->mii_1000t_ctrl_reg);
2568 	atl1_write_phy_reg(hw, MII_BMCR, MII_CR_RESET | MII_CR_AUTO_NEG_EN);
2569 	spin_unlock_irqrestore(&adapter->lock, flags);
2570 }
2571 
2572 /*
2573  * Orphaned vendor comment left intact here:
2574  * <vendor comment>
2575  * If TPD Buffer size equal to 0, PCIE DMAR_TO_INT
2576  * will assert. We do soft reset <0x1400=1> according
2577  * with the SPEC. BUT, it seemes that PCIE or DMA
2578  * state-machine will not be reset. DMAR_TO_INT will
2579  * assert again and again.
2580  * </vendor comment>
2581  */
2582 
atl1_reset(struct atl1_adapter * adapter)2583 static int atl1_reset(struct atl1_adapter *adapter)
2584 {
2585 	int ret;
2586 	ret = atl1_reset_hw(&adapter->hw);
2587 	if (ret)
2588 		return ret;
2589 	return atl1_init_hw(&adapter->hw);
2590 }
2591 
atl1_up(struct atl1_adapter * adapter)2592 static s32 atl1_up(struct atl1_adapter *adapter)
2593 {
2594 	struct net_device *netdev = adapter->netdev;
2595 	int err;
2596 	int irq_flags = 0;
2597 
2598 	/* hardware has been reset, we need to reload some things */
2599 	atlx_set_multi(netdev);
2600 	atl1_init_ring_ptrs(adapter);
2601 	atlx_restore_vlan(adapter);
2602 	err = atl1_alloc_rx_buffers(adapter);
2603 	if (unlikely(!err))
2604 		/* no RX BUFFER allocated */
2605 		return -ENOMEM;
2606 
2607 	if (unlikely(atl1_configure(adapter))) {
2608 		err = -EIO;
2609 		goto err_up;
2610 	}
2611 
2612 	err = pci_enable_msi(adapter->pdev);
2613 	if (err) {
2614 		if (netif_msg_ifup(adapter))
2615 			dev_info(&adapter->pdev->dev,
2616 				"Unable to enable MSI: %d\n", err);
2617 		irq_flags |= IRQF_SHARED;
2618 	}
2619 
2620 	err = request_irq(adapter->pdev->irq, atl1_intr, irq_flags,
2621 			netdev->name, netdev);
2622 	if (unlikely(err))
2623 		goto err_up;
2624 
2625 	napi_enable(&adapter->napi);
2626 	atlx_irq_enable(adapter);
2627 	atl1_check_link(adapter);
2628 	netif_start_queue(netdev);
2629 	return 0;
2630 
2631 err_up:
2632 	pci_disable_msi(adapter->pdev);
2633 	/* free rx_buffers */
2634 	atl1_clean_rx_ring(adapter);
2635 	return err;
2636 }
2637 
atl1_down(struct atl1_adapter * adapter)2638 static void atl1_down(struct atl1_adapter *adapter)
2639 {
2640 	struct net_device *netdev = adapter->netdev;
2641 
2642 	napi_disable(&adapter->napi);
2643 	netif_stop_queue(netdev);
2644 	del_timer_sync(&adapter->phy_config_timer);
2645 	adapter->phy_timer_pending = false;
2646 
2647 	atlx_irq_disable(adapter);
2648 	free_irq(adapter->pdev->irq, netdev);
2649 	pci_disable_msi(adapter->pdev);
2650 	atl1_reset_hw(&adapter->hw);
2651 	adapter->cmb.cmb->int_stats = 0;
2652 
2653 	adapter->link_speed = SPEED_0;
2654 	adapter->link_duplex = -1;
2655 	netif_carrier_off(netdev);
2656 
2657 	atl1_clean_tx_ring(adapter);
2658 	atl1_clean_rx_ring(adapter);
2659 }
2660 
atl1_reset_dev_task(struct work_struct * work)2661 static void atl1_reset_dev_task(struct work_struct *work)
2662 {
2663 	struct atl1_adapter *adapter =
2664 		container_of(work, struct atl1_adapter, reset_dev_task);
2665 	struct net_device *netdev = adapter->netdev;
2666 
2667 	netif_device_detach(netdev);
2668 	atl1_down(adapter);
2669 	atl1_up(adapter);
2670 	netif_device_attach(netdev);
2671 }
2672 
2673 /**
2674  * atl1_change_mtu - Change the Maximum Transfer Unit
2675  * @netdev: network interface device structure
2676  * @new_mtu: new value for maximum frame size
2677  *
2678  * Returns 0 on success, negative on failure
2679  */
atl1_change_mtu(struct net_device * netdev,int new_mtu)2680 static int atl1_change_mtu(struct net_device *netdev, int new_mtu)
2681 {
2682 	struct atl1_adapter *adapter = netdev_priv(netdev);
2683 	int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
2684 
2685 	adapter->hw.max_frame_size = max_frame;
2686 	adapter->hw.tx_jumbo_task_th = (max_frame + 7) >> 3;
2687 	adapter->rx_buffer_len = (max_frame + 7) & ~7;
2688 	adapter->hw.rx_jumbo_th = adapter->rx_buffer_len / 8;
2689 
2690 	WRITE_ONCE(netdev->mtu, new_mtu);
2691 	if (netif_running(netdev)) {
2692 		atl1_down(adapter);
2693 		atl1_up(adapter);
2694 	}
2695 
2696 	return 0;
2697 }
2698 
2699 /**
2700  * atl1_open - Called when a network interface is made active
2701  * @netdev: network interface device structure
2702  *
2703  * Returns 0 on success, negative value on failure
2704  *
2705  * The open entry point is called when a network interface is made
2706  * active by the system (IFF_UP).  At this point all resources needed
2707  * for transmit and receive operations are allocated, the interrupt
2708  * handler is registered with the OS, the watchdog timer is started,
2709  * and the stack is notified that the interface is ready.
2710  */
atl1_open(struct net_device * netdev)2711 static int atl1_open(struct net_device *netdev)
2712 {
2713 	struct atl1_adapter *adapter = netdev_priv(netdev);
2714 	int err;
2715 
2716 	netif_carrier_off(netdev);
2717 
2718 	/* allocate transmit descriptors */
2719 	err = atl1_setup_ring_resources(adapter);
2720 	if (err)
2721 		return err;
2722 
2723 	err = atl1_up(adapter);
2724 	if (err)
2725 		goto err_up;
2726 
2727 	return 0;
2728 
2729 err_up:
2730 	atl1_reset(adapter);
2731 	return err;
2732 }
2733 
2734 /**
2735  * atl1_close - Disables a network interface
2736  * @netdev: network interface device structure
2737  *
2738  * Returns 0, this is not allowed to fail
2739  *
2740  * The close entry point is called when an interface is de-activated
2741  * by the OS.  The hardware is still under the drivers control, but
2742  * needs to be disabled.  A global MAC reset is issued to stop the
2743  * hardware, and all transmit and receive resources are freed.
2744  */
atl1_close(struct net_device * netdev)2745 static int atl1_close(struct net_device *netdev)
2746 {
2747 	struct atl1_adapter *adapter = netdev_priv(netdev);
2748 	atl1_down(adapter);
2749 	atl1_free_ring_resources(adapter);
2750 	return 0;
2751 }
2752 
2753 #ifdef CONFIG_PM_SLEEP
atl1_suspend(struct device * dev)2754 static int atl1_suspend(struct device *dev)
2755 {
2756 	struct net_device *netdev = dev_get_drvdata(dev);
2757 	struct atl1_adapter *adapter = netdev_priv(netdev);
2758 	struct atl1_hw *hw = &adapter->hw;
2759 	u32 ctrl = 0;
2760 	u32 wufc = adapter->wol;
2761 	u32 val;
2762 	u16 speed;
2763 	u16 duplex;
2764 
2765 	netif_device_detach(netdev);
2766 	if (netif_running(netdev))
2767 		atl1_down(adapter);
2768 
2769 	atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
2770 	atl1_read_phy_reg(hw, MII_BMSR, (u16 *) & ctrl);
2771 	val = ctrl & BMSR_LSTATUS;
2772 	if (val)
2773 		wufc &= ~ATLX_WUFC_LNKC;
2774 	if (!wufc)
2775 		goto disable_wol;
2776 
2777 	if (val) {
2778 		val = atl1_get_speed_and_duplex(hw, &speed, &duplex);
2779 		if (val) {
2780 			if (netif_msg_ifdown(adapter))
2781 				dev_printk(KERN_DEBUG, dev,
2782 					"error getting speed/duplex\n");
2783 			goto disable_wol;
2784 		}
2785 
2786 		ctrl = 0;
2787 
2788 		/* enable magic packet WOL */
2789 		if (wufc & ATLX_WUFC_MAG)
2790 			ctrl |= (WOL_MAGIC_EN | WOL_MAGIC_PME_EN);
2791 		iowrite32(ctrl, hw->hw_addr + REG_WOL_CTRL);
2792 		ioread32(hw->hw_addr + REG_WOL_CTRL);
2793 
2794 		/* configure the mac */
2795 		ctrl = MAC_CTRL_RX_EN;
2796 		ctrl |= ((u32)((speed == SPEED_1000) ? MAC_CTRL_SPEED_1000 :
2797 			MAC_CTRL_SPEED_10_100) << MAC_CTRL_SPEED_SHIFT);
2798 		if (duplex == FULL_DUPLEX)
2799 			ctrl |= MAC_CTRL_DUPLX;
2800 		ctrl |= (((u32)adapter->hw.preamble_len &
2801 			MAC_CTRL_PRMLEN_MASK) << MAC_CTRL_PRMLEN_SHIFT);
2802 		__atlx_vlan_mode(netdev->features, &ctrl);
2803 		if (wufc & ATLX_WUFC_MAG)
2804 			ctrl |= MAC_CTRL_BC_EN;
2805 		iowrite32(ctrl, hw->hw_addr + REG_MAC_CTRL);
2806 		ioread32(hw->hw_addr + REG_MAC_CTRL);
2807 
2808 		/* poke the PHY */
2809 		ctrl = ioread32(hw->hw_addr + REG_PCIE_PHYMISC);
2810 		ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2811 		iowrite32(ctrl, hw->hw_addr + REG_PCIE_PHYMISC);
2812 		ioread32(hw->hw_addr + REG_PCIE_PHYMISC);
2813 	} else {
2814 		ctrl |= (WOL_LINK_CHG_EN | WOL_LINK_CHG_PME_EN);
2815 		iowrite32(ctrl, hw->hw_addr + REG_WOL_CTRL);
2816 		ioread32(hw->hw_addr + REG_WOL_CTRL);
2817 		iowrite32(0, hw->hw_addr + REG_MAC_CTRL);
2818 		ioread32(hw->hw_addr + REG_MAC_CTRL);
2819 		hw->phy_configured = false;
2820 	}
2821 
2822 	return 0;
2823 
2824  disable_wol:
2825 	iowrite32(0, hw->hw_addr + REG_WOL_CTRL);
2826 	ioread32(hw->hw_addr + REG_WOL_CTRL);
2827 	ctrl = ioread32(hw->hw_addr + REG_PCIE_PHYMISC);
2828 	ctrl |= PCIE_PHYMISC_FORCE_RCV_DET;
2829 	iowrite32(ctrl, hw->hw_addr + REG_PCIE_PHYMISC);
2830 	ioread32(hw->hw_addr + REG_PCIE_PHYMISC);
2831 	hw->phy_configured = false;
2832 
2833 	return 0;
2834 }
2835 
atl1_resume(struct device * dev)2836 static int atl1_resume(struct device *dev)
2837 {
2838 	struct net_device *netdev = dev_get_drvdata(dev);
2839 	struct atl1_adapter *adapter = netdev_priv(netdev);
2840 
2841 	iowrite32(0, adapter->hw.hw_addr + REG_WOL_CTRL);
2842 
2843 	atl1_reset_hw(&adapter->hw);
2844 
2845 	if (netif_running(netdev)) {
2846 		adapter->cmb.cmb->int_stats = 0;
2847 		atl1_up(adapter);
2848 	}
2849 	netif_device_attach(netdev);
2850 
2851 	return 0;
2852 }
2853 #endif
2854 
2855 static SIMPLE_DEV_PM_OPS(atl1_pm_ops, atl1_suspend, atl1_resume);
2856 
atl1_shutdown(struct pci_dev * pdev)2857 static void atl1_shutdown(struct pci_dev *pdev)
2858 {
2859 	struct net_device *netdev = pci_get_drvdata(pdev);
2860 	struct atl1_adapter *adapter = netdev_priv(netdev);
2861 
2862 #ifdef CONFIG_PM_SLEEP
2863 	atl1_suspend(&pdev->dev);
2864 #endif
2865 	pci_wake_from_d3(pdev, adapter->wol);
2866 	pci_set_power_state(pdev, PCI_D3hot);
2867 }
2868 
2869 #ifdef CONFIG_NET_POLL_CONTROLLER
atl1_poll_controller(struct net_device * netdev)2870 static void atl1_poll_controller(struct net_device *netdev)
2871 {
2872 	disable_irq(netdev->irq);
2873 	atl1_intr(netdev->irq, netdev);
2874 	enable_irq(netdev->irq);
2875 }
2876 #endif
2877 
2878 static const struct net_device_ops atl1_netdev_ops = {
2879 	.ndo_open		= atl1_open,
2880 	.ndo_stop		= atl1_close,
2881 	.ndo_start_xmit		= atl1_xmit_frame,
2882 	.ndo_set_rx_mode	= atlx_set_multi,
2883 	.ndo_validate_addr	= eth_validate_addr,
2884 	.ndo_set_mac_address	= atl1_set_mac,
2885 	.ndo_change_mtu		= atl1_change_mtu,
2886 	.ndo_fix_features	= atlx_fix_features,
2887 	.ndo_set_features	= atlx_set_features,
2888 	.ndo_eth_ioctl		= atlx_ioctl,
2889 	.ndo_tx_timeout		= atlx_tx_timeout,
2890 #ifdef CONFIG_NET_POLL_CONTROLLER
2891 	.ndo_poll_controller	= atl1_poll_controller,
2892 #endif
2893 };
2894 
2895 /**
2896  * atl1_probe - Device Initialization Routine
2897  * @pdev: PCI device information struct
2898  * @ent: entry in atl1_pci_tbl
2899  *
2900  * Returns 0 on success, negative on failure
2901  *
2902  * atl1_probe initializes an adapter identified by a pci_dev structure.
2903  * The OS initialization, configuring of the adapter private structure,
2904  * and a hardware reset occur.
2905  */
atl1_probe(struct pci_dev * pdev,const struct pci_device_id * ent)2906 static int atl1_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2907 {
2908 	struct net_device *netdev;
2909 	struct atl1_adapter *adapter;
2910 	static int cards_found = 0;
2911 	int err;
2912 
2913 	err = pci_enable_device(pdev);
2914 	if (err)
2915 		return err;
2916 
2917 	/*
2918 	 * The atl1 chip can DMA to 64-bit addresses, but it uses a single
2919 	 * shared register for the high 32 bits, so only a single, aligned,
2920 	 * 4 GB physical address range can be used at a time.
2921 	 *
2922 	 * Supporting 64-bit DMA on this hardware is more trouble than it's
2923 	 * worth.  It is far easier to limit to 32-bit DMA than update
2924 	 * various kernel subsystems to support the mechanics required by a
2925 	 * fixed-high-32-bit system.
2926 	 */
2927 	err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
2928 	if (err) {
2929 		dev_err(&pdev->dev, "no usable DMA configuration\n");
2930 		goto err_dma;
2931 	}
2932 	/*
2933 	 * Mark all PCI regions associated with PCI device
2934 	 * pdev as being reserved by owner atl1_driver_name
2935 	 */
2936 	err = pci_request_regions(pdev, ATLX_DRIVER_NAME);
2937 	if (err)
2938 		goto err_request_regions;
2939 
2940 	/*
2941 	 * Enables bus-mastering on the device and calls
2942 	 * pcibios_set_master to do the needed arch specific settings
2943 	 */
2944 	pci_set_master(pdev);
2945 
2946 	netdev = alloc_etherdev(sizeof(struct atl1_adapter));
2947 	if (!netdev) {
2948 		err = -ENOMEM;
2949 		goto err_alloc_etherdev;
2950 	}
2951 	SET_NETDEV_DEV(netdev, &pdev->dev);
2952 
2953 	pci_set_drvdata(pdev, netdev);
2954 	adapter = netdev_priv(netdev);
2955 	adapter->netdev = netdev;
2956 	adapter->pdev = pdev;
2957 	adapter->hw.back = adapter;
2958 	adapter->msg_enable = netif_msg_init(debug, atl1_default_msg);
2959 
2960 	adapter->hw.hw_addr = pci_iomap(pdev, 0, 0);
2961 	if (!adapter->hw.hw_addr) {
2962 		err = -EIO;
2963 		goto err_pci_iomap;
2964 	}
2965 	/* get device revision number */
2966 	adapter->hw.dev_rev = ioread16(adapter->hw.hw_addr +
2967 		(REG_MASTER_CTRL + 2));
2968 
2969 	/* set default ring resource counts */
2970 	adapter->rfd_ring.count = adapter->rrd_ring.count = ATL1_DEFAULT_RFD;
2971 	adapter->tpd_ring.count = ATL1_DEFAULT_TPD;
2972 
2973 	adapter->mii.dev = netdev;
2974 	adapter->mii.mdio_read = mdio_read;
2975 	adapter->mii.mdio_write = mdio_write;
2976 	adapter->mii.phy_id_mask = 0x1f;
2977 	adapter->mii.reg_num_mask = 0x1f;
2978 
2979 	netdev->netdev_ops = &atl1_netdev_ops;
2980 	netdev->watchdog_timeo = 5 * HZ;
2981 	netif_napi_add(netdev, &adapter->napi, atl1_rings_clean);
2982 
2983 	netdev->ethtool_ops = &atl1_ethtool_ops;
2984 	adapter->bd_number = cards_found;
2985 
2986 	/* setup the private structure */
2987 	err = atl1_sw_init(adapter);
2988 	if (err)
2989 		goto err_common;
2990 
2991 	netdev->features = NETIF_F_HW_CSUM;
2992 	netdev->features |= NETIF_F_SG;
2993 	netdev->features |= (NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX);
2994 
2995 	netdev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG | NETIF_F_TSO |
2996 			      NETIF_F_HW_VLAN_CTAG_RX;
2997 
2998 	/* is this valid? see atl1_setup_mac_ctrl() */
2999 	netdev->features |= NETIF_F_RXCSUM;
3000 
3001 	/* MTU range: 42 - 10218 */
3002 	netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN);
3003 	netdev->max_mtu = MAX_JUMBO_FRAME_SIZE -
3004 			  (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
3005 
3006 	/*
3007 	 * patch for some L1 of old version,
3008 	 * the final version of L1 may not need these
3009 	 * patches
3010 	 */
3011 	/* atl1_pcie_patch(adapter); */
3012 
3013 	/* really reset GPHY core */
3014 	iowrite16(0, adapter->hw.hw_addr + REG_PHY_ENABLE);
3015 
3016 	/*
3017 	 * reset the controller to
3018 	 * put the device in a known good starting state
3019 	 */
3020 	if (atl1_reset_hw(&adapter->hw)) {
3021 		err = -EIO;
3022 		goto err_common;
3023 	}
3024 
3025 	/* copy the MAC address out of the EEPROM */
3026 	if (atl1_read_mac_addr(&adapter->hw)) {
3027 		/* mark random mac */
3028 		netdev->addr_assign_type = NET_ADDR_RANDOM;
3029 	}
3030 	eth_hw_addr_set(netdev, adapter->hw.mac_addr);
3031 
3032 	if (!is_valid_ether_addr(netdev->dev_addr)) {
3033 		err = -EIO;
3034 		goto err_common;
3035 	}
3036 
3037 	atl1_check_options(adapter);
3038 
3039 	/* pre-init the MAC, and setup link */
3040 	err = atl1_init_hw(&adapter->hw);
3041 	if (err) {
3042 		err = -EIO;
3043 		goto err_common;
3044 	}
3045 
3046 	atl1_pcie_patch(adapter);
3047 	/* assume we have no link for now */
3048 	netif_carrier_off(netdev);
3049 
3050 	timer_setup(&adapter->phy_config_timer, atl1_phy_config, 0);
3051 	adapter->phy_timer_pending = false;
3052 
3053 	INIT_WORK(&adapter->reset_dev_task, atl1_reset_dev_task);
3054 
3055 	INIT_WORK(&adapter->link_chg_task, atlx_link_chg_task);
3056 
3057 	err = register_netdev(netdev);
3058 	if (err)
3059 		goto err_common;
3060 
3061 	cards_found++;
3062 	atl1_via_workaround(adapter);
3063 	return 0;
3064 
3065 err_common:
3066 	pci_iounmap(pdev, adapter->hw.hw_addr);
3067 err_pci_iomap:
3068 	free_netdev(netdev);
3069 err_alloc_etherdev:
3070 	pci_release_regions(pdev);
3071 err_dma:
3072 err_request_regions:
3073 	pci_disable_device(pdev);
3074 	return err;
3075 }
3076 
3077 /**
3078  * atl1_remove - Device Removal Routine
3079  * @pdev: PCI device information struct
3080  *
3081  * atl1_remove is called by the PCI subsystem to alert the driver
3082  * that it should release a PCI device.  The could be caused by a
3083  * Hot-Plug event, or because the driver is going to be removed from
3084  * memory.
3085  */
atl1_remove(struct pci_dev * pdev)3086 static void atl1_remove(struct pci_dev *pdev)
3087 {
3088 	struct net_device *netdev = pci_get_drvdata(pdev);
3089 	struct atl1_adapter *adapter;
3090 	/* Device not available. Return. */
3091 	if (!netdev)
3092 		return;
3093 
3094 	adapter = netdev_priv(netdev);
3095 
3096 	/*
3097 	 * Some atl1 boards lack persistent storage for their MAC, and get it
3098 	 * from the BIOS during POST.  If we've been messing with the MAC
3099 	 * address, we need to save the permanent one.
3100 	 */
3101 	if (!ether_addr_equal_unaligned(adapter->hw.mac_addr,
3102 					adapter->hw.perm_mac_addr)) {
3103 		memcpy(adapter->hw.mac_addr, adapter->hw.perm_mac_addr,
3104 			ETH_ALEN);
3105 		atl1_set_mac_addr(&adapter->hw);
3106 	}
3107 
3108 	iowrite16(0, adapter->hw.hw_addr + REG_PHY_ENABLE);
3109 	unregister_netdev(netdev);
3110 	pci_iounmap(pdev, adapter->hw.hw_addr);
3111 	pci_release_regions(pdev);
3112 	free_netdev(netdev);
3113 	pci_disable_device(pdev);
3114 }
3115 
3116 static struct pci_driver atl1_driver = {
3117 	.name = ATLX_DRIVER_NAME,
3118 	.id_table = atl1_pci_tbl,
3119 	.probe = atl1_probe,
3120 	.remove = atl1_remove,
3121 	.shutdown = atl1_shutdown,
3122 	.driver.pm = &atl1_pm_ops,
3123 };
3124 
3125 struct atl1_stats {
3126 	char stat_string[ETH_GSTRING_LEN];
3127 	int sizeof_stat;
3128 	int stat_offset;
3129 };
3130 
3131 #define ATL1_STAT(m) \
3132 	sizeof(((struct atl1_adapter *)0)->m), offsetof(struct atl1_adapter, m)
3133 
3134 static struct atl1_stats atl1_gstrings_stats[] = {
3135 	{"rx_packets", ATL1_STAT(soft_stats.rx_packets)},
3136 	{"tx_packets", ATL1_STAT(soft_stats.tx_packets)},
3137 	{"rx_bytes", ATL1_STAT(soft_stats.rx_bytes)},
3138 	{"tx_bytes", ATL1_STAT(soft_stats.tx_bytes)},
3139 	{"rx_errors", ATL1_STAT(soft_stats.rx_errors)},
3140 	{"tx_errors", ATL1_STAT(soft_stats.tx_errors)},
3141 	{"multicast", ATL1_STAT(soft_stats.multicast)},
3142 	{"collisions", ATL1_STAT(soft_stats.collisions)},
3143 	{"rx_length_errors", ATL1_STAT(soft_stats.rx_length_errors)},
3144 	{"rx_over_errors", ATL1_STAT(soft_stats.rx_missed_errors)},
3145 	{"rx_crc_errors", ATL1_STAT(soft_stats.rx_crc_errors)},
3146 	{"rx_frame_errors", ATL1_STAT(soft_stats.rx_frame_errors)},
3147 	{"rx_fifo_errors", ATL1_STAT(soft_stats.rx_fifo_errors)},
3148 	{"rx_missed_errors", ATL1_STAT(soft_stats.rx_missed_errors)},
3149 	{"tx_aborted_errors", ATL1_STAT(soft_stats.tx_aborted_errors)},
3150 	{"tx_carrier_errors", ATL1_STAT(soft_stats.tx_carrier_errors)},
3151 	{"tx_fifo_errors", ATL1_STAT(soft_stats.tx_fifo_errors)},
3152 	{"tx_window_errors", ATL1_STAT(soft_stats.tx_window_errors)},
3153 	{"tx_abort_exce_coll", ATL1_STAT(soft_stats.excecol)},
3154 	{"tx_abort_late_coll", ATL1_STAT(soft_stats.latecol)},
3155 	{"tx_deferred_ok", ATL1_STAT(soft_stats.deffer)},
3156 	{"tx_single_coll_ok", ATL1_STAT(soft_stats.scc)},
3157 	{"tx_multi_coll_ok", ATL1_STAT(soft_stats.mcc)},
3158 	{"tx_underrun", ATL1_STAT(soft_stats.tx_underrun)},
3159 	{"tx_trunc", ATL1_STAT(soft_stats.tx_trunc)},
3160 	{"tx_pause", ATL1_STAT(soft_stats.tx_pause)},
3161 	{"rx_pause", ATL1_STAT(soft_stats.rx_pause)},
3162 	{"rx_rrd_ov", ATL1_STAT(soft_stats.rx_rrd_ov)},
3163 	{"rx_trunc", ATL1_STAT(soft_stats.rx_trunc)}
3164 };
3165 
atl1_get_ethtool_stats(struct net_device * netdev,struct ethtool_stats * stats,u64 * data)3166 static void atl1_get_ethtool_stats(struct net_device *netdev,
3167 	struct ethtool_stats *stats, u64 *data)
3168 {
3169 	struct atl1_adapter *adapter = netdev_priv(netdev);
3170 	int i;
3171 	char *p;
3172 
3173 	for (i = 0; i < ARRAY_SIZE(atl1_gstrings_stats); i++) {
3174 		p = (char *)adapter+atl1_gstrings_stats[i].stat_offset;
3175 		data[i] = (atl1_gstrings_stats[i].sizeof_stat ==
3176 			sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
3177 	}
3178 
3179 }
3180 
atl1_get_sset_count(struct net_device * netdev,int sset)3181 static int atl1_get_sset_count(struct net_device *netdev, int sset)
3182 {
3183 	switch (sset) {
3184 	case ETH_SS_STATS:
3185 		return ARRAY_SIZE(atl1_gstrings_stats);
3186 	default:
3187 		return -EOPNOTSUPP;
3188 	}
3189 }
3190 
atl1_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * cmd)3191 static int atl1_get_link_ksettings(struct net_device *netdev,
3192 				   struct ethtool_link_ksettings *cmd)
3193 {
3194 	struct atl1_adapter *adapter = netdev_priv(netdev);
3195 	struct atl1_hw *hw = &adapter->hw;
3196 	u32 supported, advertising;
3197 
3198 	supported = (SUPPORTED_10baseT_Half |
3199 			   SUPPORTED_10baseT_Full |
3200 			   SUPPORTED_100baseT_Half |
3201 			   SUPPORTED_100baseT_Full |
3202 			   SUPPORTED_1000baseT_Full |
3203 			   SUPPORTED_Autoneg | SUPPORTED_TP);
3204 	advertising = ADVERTISED_TP;
3205 	if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
3206 	    hw->media_type == MEDIA_TYPE_1000M_FULL) {
3207 		advertising |= ADVERTISED_Autoneg;
3208 		if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR) {
3209 			advertising |= ADVERTISED_Autoneg;
3210 			advertising |=
3211 			    (ADVERTISED_10baseT_Half |
3212 			     ADVERTISED_10baseT_Full |
3213 			     ADVERTISED_100baseT_Half |
3214 			     ADVERTISED_100baseT_Full |
3215 			     ADVERTISED_1000baseT_Full);
3216 		} else
3217 			advertising |= (ADVERTISED_1000baseT_Full);
3218 	}
3219 	cmd->base.port = PORT_TP;
3220 	cmd->base.phy_address = 0;
3221 
3222 	if (netif_carrier_ok(adapter->netdev)) {
3223 		u16 link_speed, link_duplex;
3224 		atl1_get_speed_and_duplex(hw, &link_speed, &link_duplex);
3225 		cmd->base.speed = link_speed;
3226 		if (link_duplex == FULL_DUPLEX)
3227 			cmd->base.duplex = DUPLEX_FULL;
3228 		else
3229 			cmd->base.duplex = DUPLEX_HALF;
3230 	} else {
3231 		cmd->base.speed = SPEED_UNKNOWN;
3232 		cmd->base.duplex = DUPLEX_UNKNOWN;
3233 	}
3234 	if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
3235 	    hw->media_type == MEDIA_TYPE_1000M_FULL)
3236 		cmd->base.autoneg = AUTONEG_ENABLE;
3237 	else
3238 		cmd->base.autoneg = AUTONEG_DISABLE;
3239 
3240 	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
3241 						supported);
3242 	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
3243 						advertising);
3244 
3245 	return 0;
3246 }
3247 
atl1_set_link_ksettings(struct net_device * netdev,const struct ethtool_link_ksettings * cmd)3248 static int atl1_set_link_ksettings(struct net_device *netdev,
3249 				   const struct ethtool_link_ksettings *cmd)
3250 {
3251 	struct atl1_adapter *adapter = netdev_priv(netdev);
3252 	struct atl1_hw *hw = &adapter->hw;
3253 	u16 phy_data;
3254 	int ret_val = 0;
3255 	u16 old_media_type = hw->media_type;
3256 
3257 	if (netif_running(adapter->netdev)) {
3258 		if (netif_msg_link(adapter))
3259 			dev_dbg(&adapter->pdev->dev,
3260 				"ethtool shutting down adapter\n");
3261 		atl1_down(adapter);
3262 	}
3263 
3264 	if (cmd->base.autoneg == AUTONEG_ENABLE)
3265 		hw->media_type = MEDIA_TYPE_AUTO_SENSOR;
3266 	else {
3267 		u32 speed = cmd->base.speed;
3268 		if (speed == SPEED_1000) {
3269 			if (cmd->base.duplex != DUPLEX_FULL) {
3270 				if (netif_msg_link(adapter))
3271 					dev_warn(&adapter->pdev->dev,
3272 						"1000M half is invalid\n");
3273 				ret_val = -EINVAL;
3274 				goto exit_sset;
3275 			}
3276 			hw->media_type = MEDIA_TYPE_1000M_FULL;
3277 		} else if (speed == SPEED_100) {
3278 			if (cmd->base.duplex == DUPLEX_FULL)
3279 				hw->media_type = MEDIA_TYPE_100M_FULL;
3280 			else
3281 				hw->media_type = MEDIA_TYPE_100M_HALF;
3282 		} else {
3283 			if (cmd->base.duplex == DUPLEX_FULL)
3284 				hw->media_type = MEDIA_TYPE_10M_FULL;
3285 			else
3286 				hw->media_type = MEDIA_TYPE_10M_HALF;
3287 		}
3288 	}
3289 
3290 	if (atl1_phy_setup_autoneg_adv(hw)) {
3291 		ret_val = -EINVAL;
3292 		if (netif_msg_link(adapter))
3293 			dev_warn(&adapter->pdev->dev,
3294 				"invalid ethtool speed/duplex setting\n");
3295 		goto exit_sset;
3296 	}
3297 	if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
3298 	    hw->media_type == MEDIA_TYPE_1000M_FULL)
3299 		phy_data = MII_CR_RESET | MII_CR_AUTO_NEG_EN;
3300 	else {
3301 		switch (hw->media_type) {
3302 		case MEDIA_TYPE_100M_FULL:
3303 			phy_data =
3304 			    MII_CR_FULL_DUPLEX | MII_CR_SPEED_100 |
3305 			    MII_CR_RESET;
3306 			break;
3307 		case MEDIA_TYPE_100M_HALF:
3308 			phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
3309 			break;
3310 		case MEDIA_TYPE_10M_FULL:
3311 			phy_data =
3312 			    MII_CR_FULL_DUPLEX | MII_CR_SPEED_10 | MII_CR_RESET;
3313 			break;
3314 		default:
3315 			/* MEDIA_TYPE_10M_HALF: */
3316 			phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
3317 			break;
3318 		}
3319 	}
3320 	atl1_write_phy_reg(hw, MII_BMCR, phy_data);
3321 exit_sset:
3322 	if (ret_val)
3323 		hw->media_type = old_media_type;
3324 
3325 	if (netif_running(adapter->netdev)) {
3326 		if (netif_msg_link(adapter))
3327 			dev_dbg(&adapter->pdev->dev,
3328 				"ethtool starting adapter\n");
3329 		atl1_up(adapter);
3330 	} else if (!ret_val) {
3331 		if (netif_msg_link(adapter))
3332 			dev_dbg(&adapter->pdev->dev,
3333 				"ethtool resetting adapter\n");
3334 		atl1_reset(adapter);
3335 	}
3336 	return ret_val;
3337 }
3338 
atl1_get_drvinfo(struct net_device * netdev,struct ethtool_drvinfo * drvinfo)3339 static void atl1_get_drvinfo(struct net_device *netdev,
3340 	struct ethtool_drvinfo *drvinfo)
3341 {
3342 	struct atl1_adapter *adapter = netdev_priv(netdev);
3343 
3344 	strscpy(drvinfo->driver, ATLX_DRIVER_NAME, sizeof(drvinfo->driver));
3345 	strscpy(drvinfo->bus_info, pci_name(adapter->pdev),
3346 		sizeof(drvinfo->bus_info));
3347 }
3348 
atl1_get_wol(struct net_device * netdev,struct ethtool_wolinfo * wol)3349 static void atl1_get_wol(struct net_device *netdev,
3350 	struct ethtool_wolinfo *wol)
3351 {
3352 	struct atl1_adapter *adapter = netdev_priv(netdev);
3353 
3354 	wol->supported = WAKE_MAGIC;
3355 	wol->wolopts = 0;
3356 	if (adapter->wol & ATLX_WUFC_MAG)
3357 		wol->wolopts |= WAKE_MAGIC;
3358 }
3359 
atl1_set_wol(struct net_device * netdev,struct ethtool_wolinfo * wol)3360 static int atl1_set_wol(struct net_device *netdev,
3361 	struct ethtool_wolinfo *wol)
3362 {
3363 	struct atl1_adapter *adapter = netdev_priv(netdev);
3364 
3365 	if (wol->wolopts & (WAKE_PHY | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST |
3366 		WAKE_ARP | WAKE_MAGICSECURE))
3367 		return -EOPNOTSUPP;
3368 	adapter->wol = 0;
3369 	if (wol->wolopts & WAKE_MAGIC)
3370 		adapter->wol |= ATLX_WUFC_MAG;
3371 
3372 	device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
3373 
3374 	return 0;
3375 }
3376 
atl1_get_msglevel(struct net_device * netdev)3377 static u32 atl1_get_msglevel(struct net_device *netdev)
3378 {
3379 	struct atl1_adapter *adapter = netdev_priv(netdev);
3380 	return adapter->msg_enable;
3381 }
3382 
atl1_set_msglevel(struct net_device * netdev,u32 value)3383 static void atl1_set_msglevel(struct net_device *netdev, u32 value)
3384 {
3385 	struct atl1_adapter *adapter = netdev_priv(netdev);
3386 	adapter->msg_enable = value;
3387 }
3388 
atl1_get_regs_len(struct net_device * netdev)3389 static int atl1_get_regs_len(struct net_device *netdev)
3390 {
3391 	return ATL1_REG_COUNT * sizeof(u32);
3392 }
3393 
atl1_get_regs(struct net_device * netdev,struct ethtool_regs * regs,void * p)3394 static void atl1_get_regs(struct net_device *netdev, struct ethtool_regs *regs,
3395 	void *p)
3396 {
3397 	struct atl1_adapter *adapter = netdev_priv(netdev);
3398 	struct atl1_hw *hw = &adapter->hw;
3399 	unsigned int i;
3400 	u32 *regbuf = p;
3401 
3402 	for (i = 0; i < ATL1_REG_COUNT; i++) {
3403 		/*
3404 		 * This switch statement avoids reserved regions
3405 		 * of register space.
3406 		 */
3407 		switch (i) {
3408 		case 6 ... 9:
3409 		case 14:
3410 		case 29 ... 31:
3411 		case 34 ... 63:
3412 		case 75 ... 127:
3413 		case 136 ... 1023:
3414 		case 1027 ... 1087:
3415 		case 1091 ... 1151:
3416 		case 1194 ... 1195:
3417 		case 1200 ... 1201:
3418 		case 1206 ... 1213:
3419 		case 1216 ... 1279:
3420 		case 1290 ... 1311:
3421 		case 1323 ... 1343:
3422 		case 1358 ... 1359:
3423 		case 1368 ... 1375:
3424 		case 1378 ... 1383:
3425 		case 1388 ... 1391:
3426 		case 1393 ... 1395:
3427 		case 1402 ... 1403:
3428 		case 1410 ... 1471:
3429 		case 1522 ... 1535:
3430 			/* reserved region; don't read it */
3431 			regbuf[i] = 0;
3432 			break;
3433 		default:
3434 			/* unreserved region */
3435 			regbuf[i] = ioread32(hw->hw_addr + (i * sizeof(u32)));
3436 		}
3437 	}
3438 }
3439 
atl1_get_ringparam(struct net_device * netdev,struct ethtool_ringparam * ring,struct kernel_ethtool_ringparam * kernel_ring,struct netlink_ext_ack * extack)3440 static void atl1_get_ringparam(struct net_device *netdev,
3441 			       struct ethtool_ringparam *ring,
3442 			       struct kernel_ethtool_ringparam *kernel_ring,
3443 			       struct netlink_ext_ack *extack)
3444 {
3445 	struct atl1_adapter *adapter = netdev_priv(netdev);
3446 	struct atl1_tpd_ring *txdr = &adapter->tpd_ring;
3447 	struct atl1_rfd_ring *rxdr = &adapter->rfd_ring;
3448 
3449 	ring->rx_max_pending = ATL1_MAX_RFD;
3450 	ring->tx_max_pending = ATL1_MAX_TPD;
3451 	ring->rx_pending = rxdr->count;
3452 	ring->tx_pending = txdr->count;
3453 }
3454 
atl1_set_ringparam(struct net_device * netdev,struct ethtool_ringparam * ring,struct kernel_ethtool_ringparam * kernel_ring,struct netlink_ext_ack * extack)3455 static int atl1_set_ringparam(struct net_device *netdev,
3456 			      struct ethtool_ringparam *ring,
3457 			      struct kernel_ethtool_ringparam *kernel_ring,
3458 			      struct netlink_ext_ack *extack)
3459 {
3460 	struct atl1_adapter *adapter = netdev_priv(netdev);
3461 	struct atl1_tpd_ring *tpdr = &adapter->tpd_ring;
3462 	struct atl1_rrd_ring *rrdr = &adapter->rrd_ring;
3463 	struct atl1_rfd_ring *rfdr = &adapter->rfd_ring;
3464 
3465 	struct atl1_tpd_ring tpd_old, tpd_new;
3466 	struct atl1_rfd_ring rfd_old, rfd_new;
3467 	struct atl1_rrd_ring rrd_old, rrd_new;
3468 	struct atl1_ring_header rhdr_old, rhdr_new;
3469 	struct atl1_smb smb;
3470 	struct atl1_cmb cmb;
3471 	int err;
3472 
3473 	tpd_old = adapter->tpd_ring;
3474 	rfd_old = adapter->rfd_ring;
3475 	rrd_old = adapter->rrd_ring;
3476 	rhdr_old = adapter->ring_header;
3477 
3478 	if (netif_running(adapter->netdev))
3479 		atl1_down(adapter);
3480 
3481 	rfdr->count = (u16) max(ring->rx_pending, (u32) ATL1_MIN_RFD);
3482 	rfdr->count = rfdr->count > ATL1_MAX_RFD ? ATL1_MAX_RFD :
3483 			rfdr->count;
3484 	rfdr->count = (rfdr->count + 3) & ~3;
3485 	rrdr->count = rfdr->count;
3486 
3487 	tpdr->count = (u16) max(ring->tx_pending, (u32) ATL1_MIN_TPD);
3488 	tpdr->count = tpdr->count > ATL1_MAX_TPD ? ATL1_MAX_TPD :
3489 			tpdr->count;
3490 	tpdr->count = (tpdr->count + 3) & ~3;
3491 
3492 	if (netif_running(adapter->netdev)) {
3493 		/* try to get new resources before deleting old */
3494 		err = atl1_setup_ring_resources(adapter);
3495 		if (err)
3496 			goto err_setup_ring;
3497 
3498 		/*
3499 		 * save the new, restore the old in order to free it,
3500 		 * then restore the new back again
3501 		 */
3502 
3503 		rfd_new = adapter->rfd_ring;
3504 		rrd_new = adapter->rrd_ring;
3505 		tpd_new = adapter->tpd_ring;
3506 		rhdr_new = adapter->ring_header;
3507 		adapter->rfd_ring = rfd_old;
3508 		adapter->rrd_ring = rrd_old;
3509 		adapter->tpd_ring = tpd_old;
3510 		adapter->ring_header = rhdr_old;
3511 		/*
3512 		 * Save SMB and CMB, since atl1_free_ring_resources
3513 		 * will clear them.
3514 		 */
3515 		smb = adapter->smb;
3516 		cmb = adapter->cmb;
3517 		atl1_free_ring_resources(adapter);
3518 		adapter->rfd_ring = rfd_new;
3519 		adapter->rrd_ring = rrd_new;
3520 		adapter->tpd_ring = tpd_new;
3521 		adapter->ring_header = rhdr_new;
3522 		adapter->smb = smb;
3523 		adapter->cmb = cmb;
3524 
3525 		err = atl1_up(adapter);
3526 		if (err)
3527 			return err;
3528 	}
3529 	return 0;
3530 
3531 err_setup_ring:
3532 	adapter->rfd_ring = rfd_old;
3533 	adapter->rrd_ring = rrd_old;
3534 	adapter->tpd_ring = tpd_old;
3535 	adapter->ring_header = rhdr_old;
3536 	atl1_up(adapter);
3537 	return err;
3538 }
3539 
atl1_get_pauseparam(struct net_device * netdev,struct ethtool_pauseparam * epause)3540 static void atl1_get_pauseparam(struct net_device *netdev,
3541 	struct ethtool_pauseparam *epause)
3542 {
3543 	struct atl1_adapter *adapter = netdev_priv(netdev);
3544 	struct atl1_hw *hw = &adapter->hw;
3545 
3546 	if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
3547 	    hw->media_type == MEDIA_TYPE_1000M_FULL) {
3548 		epause->autoneg = AUTONEG_ENABLE;
3549 	} else {
3550 		epause->autoneg = AUTONEG_DISABLE;
3551 	}
3552 	epause->rx_pause = 1;
3553 	epause->tx_pause = 1;
3554 }
3555 
atl1_set_pauseparam(struct net_device * netdev,struct ethtool_pauseparam * epause)3556 static int atl1_set_pauseparam(struct net_device *netdev,
3557 	struct ethtool_pauseparam *epause)
3558 {
3559 	struct atl1_adapter *adapter = netdev_priv(netdev);
3560 	struct atl1_hw *hw = &adapter->hw;
3561 
3562 	if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
3563 	    hw->media_type == MEDIA_TYPE_1000M_FULL) {
3564 		epause->autoneg = AUTONEG_ENABLE;
3565 	} else {
3566 		epause->autoneg = AUTONEG_DISABLE;
3567 	}
3568 
3569 	epause->rx_pause = 1;
3570 	epause->tx_pause = 1;
3571 
3572 	return 0;
3573 }
3574 
atl1_get_strings(struct net_device * netdev,u32 stringset,u8 * data)3575 static void atl1_get_strings(struct net_device *netdev, u32 stringset,
3576 	u8 *data)
3577 {
3578 	u8 *p = data;
3579 	int i;
3580 
3581 	switch (stringset) {
3582 	case ETH_SS_STATS:
3583 		for (i = 0; i < ARRAY_SIZE(atl1_gstrings_stats); i++) {
3584 			memcpy(p, atl1_gstrings_stats[i].stat_string,
3585 				ETH_GSTRING_LEN);
3586 			p += ETH_GSTRING_LEN;
3587 		}
3588 		break;
3589 	}
3590 }
3591 
atl1_nway_reset(struct net_device * netdev)3592 static int atl1_nway_reset(struct net_device *netdev)
3593 {
3594 	struct atl1_adapter *adapter = netdev_priv(netdev);
3595 	struct atl1_hw *hw = &adapter->hw;
3596 
3597 	if (netif_running(netdev)) {
3598 		u16 phy_data;
3599 		atl1_down(adapter);
3600 
3601 		if (hw->media_type == MEDIA_TYPE_AUTO_SENSOR ||
3602 			hw->media_type == MEDIA_TYPE_1000M_FULL) {
3603 			phy_data = MII_CR_RESET | MII_CR_AUTO_NEG_EN;
3604 		} else {
3605 			switch (hw->media_type) {
3606 			case MEDIA_TYPE_100M_FULL:
3607 				phy_data = MII_CR_FULL_DUPLEX |
3608 					MII_CR_SPEED_100 | MII_CR_RESET;
3609 				break;
3610 			case MEDIA_TYPE_100M_HALF:
3611 				phy_data = MII_CR_SPEED_100 | MII_CR_RESET;
3612 				break;
3613 			case MEDIA_TYPE_10M_FULL:
3614 				phy_data = MII_CR_FULL_DUPLEX |
3615 					MII_CR_SPEED_10 | MII_CR_RESET;
3616 				break;
3617 			default:
3618 				/* MEDIA_TYPE_10M_HALF */
3619 				phy_data = MII_CR_SPEED_10 | MII_CR_RESET;
3620 			}
3621 		}
3622 		atl1_write_phy_reg(hw, MII_BMCR, phy_data);
3623 		atl1_up(adapter);
3624 	}
3625 	return 0;
3626 }
3627 
3628 static const struct ethtool_ops atl1_ethtool_ops = {
3629 	.get_drvinfo		= atl1_get_drvinfo,
3630 	.get_wol		= atl1_get_wol,
3631 	.set_wol		= atl1_set_wol,
3632 	.get_msglevel		= atl1_get_msglevel,
3633 	.set_msglevel		= atl1_set_msglevel,
3634 	.get_regs_len		= atl1_get_regs_len,
3635 	.get_regs		= atl1_get_regs,
3636 	.get_ringparam		= atl1_get_ringparam,
3637 	.set_ringparam		= atl1_set_ringparam,
3638 	.get_pauseparam		= atl1_get_pauseparam,
3639 	.set_pauseparam		= atl1_set_pauseparam,
3640 	.get_link		= ethtool_op_get_link,
3641 	.get_strings		= atl1_get_strings,
3642 	.nway_reset		= atl1_nway_reset,
3643 	.get_ethtool_stats	= atl1_get_ethtool_stats,
3644 	.get_sset_count		= atl1_get_sset_count,
3645 	.get_link_ksettings	= atl1_get_link_ksettings,
3646 	.set_link_ksettings	= atl1_set_link_ksettings,
3647 };
3648 
3649 module_pci_driver(atl1_driver);
3650