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Merge branch 'for-linus' of git://git.infradead.org/users/sameo/mfd-2.6
[linux-btrfs-devel.git] / drivers / net / pch_gbe / pch_gbe_main.c
blob567ff10889be62e670eb352684b7bfdf7802af71
1 /*
2 * Copyright (C) 1999 - 2010 Intel Corporation.
3 * Copyright (C) 2010 OKI SEMICONDUCTOR CO., LTD.
4 *
5 * This code was derived from the Intel e1000e Linux driver.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21 #include "pch_gbe.h"
22 #include "pch_gbe_api.h"
23
24 #define DRV_VERSION "1.00"
25 const char pch_driver_version[] = DRV_VERSION;
26
27 #define PCI_DEVICE_ID_INTEL_IOH1_GBE 0x8802 /* Pci device ID */
28 #define PCH_GBE_MAR_ENTRIES 16
29 #define PCH_GBE_SHORT_PKT 64
30 #define DSC_INIT16 0xC000
31 #define PCH_GBE_DMA_ALIGN 0
32 #define PCH_GBE_DMA_PADDING 2
33 #define PCH_GBE_WATCHDOG_PERIOD (1 * HZ) /* watchdog time */
34 #define PCH_GBE_COPYBREAK_DEFAULT 256
35 #define PCH_GBE_PCI_BAR 1
36 #define PCH_GBE_RESERVE_MEMORY 0x200000 /* 2MB */
37
38 /* Macros for ML7223 */
39 #define PCI_VENDOR_ID_ROHM 0x10db
40 #define PCI_DEVICE_ID_ROHM_ML7223_GBE 0x8013
41
42 /* Macros for ML7831 */
43 #define PCI_DEVICE_ID_ROHM_ML7831_GBE 0x8802
44
45 #define PCH_GBE_TX_WEIGHT 64
46 #define PCH_GBE_RX_WEIGHT 64
47 #define PCH_GBE_RX_BUFFER_WRITE 16
48
49 /* Initialize the wake-on-LAN settings */
50 #define PCH_GBE_WL_INIT_SETTING (PCH_GBE_WLC_MP)
51
52 #define PCH_GBE_MAC_RGMII_CTRL_SETTING ( \
53 PCH_GBE_CHIP_TYPE_INTERNAL | \
54 PCH_GBE_RGMII_MODE_RGMII \
55 )
56
57 /* Ethertype field values */
58 #define PCH_GBE_MAX_RX_BUFFER_SIZE 0x2880
59 #define PCH_GBE_MAX_JUMBO_FRAME_SIZE 10318
60 #define PCH_GBE_FRAME_SIZE_2048 2048
61 #define PCH_GBE_FRAME_SIZE_4096 4096
62 #define PCH_GBE_FRAME_SIZE_8192 8192
63
64 #define PCH_GBE_GET_DESC(R, i, type) (&(((struct type *)((R).desc))[i]))
65 #define PCH_GBE_RX_DESC(R, i) PCH_GBE_GET_DESC(R, i, pch_gbe_rx_desc)
66 #define PCH_GBE_TX_DESC(R, i) PCH_GBE_GET_DESC(R, i, pch_gbe_tx_desc)
67 #define PCH_GBE_DESC_UNUSED(R) \
68 ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
69 (R)->next_to_clean - (R)->next_to_use - 1)
70
71 /* Pause packet value */
72 #define PCH_GBE_PAUSE_PKT1_VALUE 0x00C28001
73 #define PCH_GBE_PAUSE_PKT2_VALUE 0x00000100
74 #define PCH_GBE_PAUSE_PKT4_VALUE 0x01000888
75 #define PCH_GBE_PAUSE_PKT5_VALUE 0x0000FFFF
76
77 #define PCH_GBE_ETH_ALEN 6
78
79 /* This defines the bits that are set in the Interrupt Mask
80 * Set/Read Register. Each bit is documented below:
81 * o RXT0 = Receiver Timer Interrupt (ring 0)
82 * o TXDW = Transmit Descriptor Written Back
83 * o RXDMT0 = Receive Descriptor Minimum Threshold hit (ring 0)
84 * o RXSEQ = Receive Sequence Error
85 * o LSC = Link Status Change
86 */
87 #define PCH_GBE_INT_ENABLE_MASK ( \
88 PCH_GBE_INT_RX_DMA_CMPLT | \
89 PCH_GBE_INT_RX_DSC_EMP | \
90 PCH_GBE_INT_RX_FIFO_ERR | \
91 PCH_GBE_INT_WOL_DET | \
92 PCH_GBE_INT_TX_CMPLT \
93 )
94
95 #define PCH_GBE_INT_DISABLE_ALL 0
96
97 static unsigned int copybreak __read_mostly = PCH_GBE_COPYBREAK_DEFAULT;
98
99 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg);
100 static void pch_gbe_mdio_write(struct net_device *netdev, int addr, int reg,
101 int data);
102
103 inline void pch_gbe_mac_load_mac_addr(struct pch_gbe_hw *hw)
104 {
105 iowrite32(0x01, &hw->reg->MAC_ADDR_LOAD);
106 }
107
108 /**
109 * pch_gbe_mac_read_mac_addr - Read MAC address
110 * @hw: Pointer to the HW structure
111 * Returns
112 * 0: Successful.
113 */
114 s32 pch_gbe_mac_read_mac_addr(struct pch_gbe_hw *hw)
115 {
116 u32 adr1a, adr1b;
117
118 adr1a = ioread32(&hw->reg->mac_adr[0].high);
119 adr1b = ioread32(&hw->reg->mac_adr[0].low);
120
121 hw->mac.addr[0] = (u8)(adr1a & 0xFF);
122 hw->mac.addr[1] = (u8)((adr1a >> 8) & 0xFF);
123 hw->mac.addr[2] = (u8)((adr1a >> 16) & 0xFF);
124 hw->mac.addr[3] = (u8)((adr1a >> 24) & 0xFF);
125 hw->mac.addr[4] = (u8)(adr1b & 0xFF);
126 hw->mac.addr[5] = (u8)((adr1b >> 8) & 0xFF);
127
128 pr_debug("hw->mac.addr : %pM\n", hw->mac.addr);
129 return 0;
130 }
131
132 /**
133 * pch_gbe_wait_clr_bit - Wait to clear a bit
134 * @reg: Pointer of register
135 * @busy: Busy bit
136 */
137 static void pch_gbe_wait_clr_bit(void *reg, u32 bit)
138 {
139 u32 tmp;
140 /* wait busy */
141 tmp = 1000;
142 while ((ioread32(reg) & bit) && --tmp)
143 cpu_relax();
144 if (!tmp)
145 pr_err("Error: busy bit is not cleared\n");
146 }
147
148 /**
149 * pch_gbe_wait_clr_bit_irq - Wait to clear a bit for interrupt context
150 * @reg: Pointer of register
151 * @busy: Busy bit
152 */
153 static int pch_gbe_wait_clr_bit_irq(void *reg, u32 bit)
154 {
155 u32 tmp;
156 int ret = -1;
157 /* wait busy */
158 tmp = 20;
159 while ((ioread32(reg) & bit) && --tmp)
160 udelay(5);
161 if (!tmp)
162 pr_err("Error: busy bit is not cleared\n");
163 else
164 ret = 0;
165 return ret;
166 }
167
168 /**
169 * pch_gbe_mac_mar_set - Set MAC address register
170 * @hw: Pointer to the HW structure
171 * @addr: Pointer to the MAC address
172 * @index: MAC address array register
173 */
174 static void pch_gbe_mac_mar_set(struct pch_gbe_hw *hw, u8 * addr, u32 index)
175 {
176 u32 mar_low, mar_high, adrmask;
177
178 pr_debug("index : 0x%x\n", index);
179
180 /*
181 * HW expects these in little endian so we reverse the byte order
182 * from network order (big endian) to little endian
183 */
184 mar_high = ((u32) addr[0] | ((u32) addr[1] << 8) |
185 ((u32) addr[2] << 16) | ((u32) addr[3] << 24));
186 mar_low = ((u32) addr[4] | ((u32) addr[5] << 8));
187 /* Stop the MAC Address of index. */
188 adrmask = ioread32(&hw->reg->ADDR_MASK);
189 iowrite32((adrmask | (0x0001 << index)), &hw->reg->ADDR_MASK);
190 /* wait busy */
191 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
192 /* Set the MAC address to the MAC address 1A/1B register */
193 iowrite32(mar_high, &hw->reg->mac_adr[index].high);
194 iowrite32(mar_low, &hw->reg->mac_adr[index].low);
195 /* Start the MAC address of index */
196 iowrite32((adrmask & ~(0x0001 << index)), &hw->reg->ADDR_MASK);
197 /* wait busy */
198 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
199 }
200
201 /**
202 * pch_gbe_mac_reset_hw - Reset hardware
203 * @hw: Pointer to the HW structure
204 */
205 static void pch_gbe_mac_reset_hw(struct pch_gbe_hw *hw)
206 {
207 /* Read the MAC address. and store to the private data */
208 pch_gbe_mac_read_mac_addr(hw);
209 iowrite32(PCH_GBE_ALL_RST, &hw->reg->RESET);
210 #ifdef PCH_GBE_MAC_IFOP_RGMII
211 iowrite32(PCH_GBE_MODE_GMII_ETHER, &hw->reg->MODE);
212 #endif
213 pch_gbe_wait_clr_bit(&hw->reg->RESET, PCH_GBE_ALL_RST);
214 /* Setup the receive address */
215 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
216 return;
217 }
218
219 static void pch_gbe_mac_reset_rx(struct pch_gbe_hw *hw)
220 {
221 /* Read the MAC address. and store to the private data */
222 pch_gbe_mac_read_mac_addr(hw);
223 iowrite32(PCH_GBE_RX_RST, &hw->reg->RESET);
224 pch_gbe_wait_clr_bit_irq(&hw->reg->RESET, PCH_GBE_RX_RST);
225 /* Setup the MAC address */
226 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
227 return;
228 }
229
230 /**
231 * pch_gbe_mac_init_rx_addrs - Initialize receive address's
232 * @hw: Pointer to the HW structure
233 * @mar_count: Receive address registers
234 */
235 static void pch_gbe_mac_init_rx_addrs(struct pch_gbe_hw *hw, u16 mar_count)
236 {
237 u32 i;
238
239 /* Setup the receive address */
240 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
241
242 /* Zero out the other receive addresses */
243 for (i = 1; i < mar_count; i++) {
244 iowrite32(0, &hw->reg->mac_adr[i].high);
245 iowrite32(0, &hw->reg->mac_adr[i].low);
246 }
247 iowrite32(0xFFFE, &hw->reg->ADDR_MASK);
248 /* wait busy */
249 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
250 }
251
252
253 /**
254 * pch_gbe_mac_mc_addr_list_update - Update Multicast addresses
255 * @hw: Pointer to the HW structure
256 * @mc_addr_list: Array of multicast addresses to program
257 * @mc_addr_count: Number of multicast addresses to program
258 * @mar_used_count: The first MAC Address register free to program
259 * @mar_total_num: Total number of supported MAC Address Registers
260 */
261 static void pch_gbe_mac_mc_addr_list_update(struct pch_gbe_hw *hw,
262 u8 *mc_addr_list, u32 mc_addr_count,
263 u32 mar_used_count, u32 mar_total_num)
264 {
265 u32 i, adrmask;
266
267 /* Load the first set of multicast addresses into the exact
268 * filters (RAR). If there are not enough to fill the RAR
269 * array, clear the filters.
270 */
271 for (i = mar_used_count; i < mar_total_num; i++) {
272 if (mc_addr_count) {
273 pch_gbe_mac_mar_set(hw, mc_addr_list, i);
274 mc_addr_count--;
275 mc_addr_list += PCH_GBE_ETH_ALEN;
276 } else {
277 /* Clear MAC address mask */
278 adrmask = ioread32(&hw->reg->ADDR_MASK);
279 iowrite32((adrmask | (0x0001 << i)),
280 &hw->reg->ADDR_MASK);
281 /* wait busy */
282 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
283 /* Clear MAC address */
284 iowrite32(0, &hw->reg->mac_adr[i].high);
285 iowrite32(0, &hw->reg->mac_adr[i].low);
286 }
287 }
288 }
289
290 /**
291 * pch_gbe_mac_force_mac_fc - Force the MAC's flow control settings
292 * @hw: Pointer to the HW structure
293 * Returns
294 * 0: Successful.
295 * Negative value: Failed.
296 */
297 s32 pch_gbe_mac_force_mac_fc(struct pch_gbe_hw *hw)
298 {
299 struct pch_gbe_mac_info *mac = &hw->mac;
300 u32 rx_fctrl;
301
302 pr_debug("mac->fc = %u\n", mac->fc);
303
304 rx_fctrl = ioread32(&hw->reg->RX_FCTRL);
305
306 switch (mac->fc) {
307 case PCH_GBE_FC_NONE:
308 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
309 mac->tx_fc_enable = false;
310 break;
311 case PCH_GBE_FC_RX_PAUSE:
312 rx_fctrl |= PCH_GBE_FL_CTRL_EN;
313 mac->tx_fc_enable = false;
314 break;
315 case PCH_GBE_FC_TX_PAUSE:
316 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
317 mac->tx_fc_enable = true;
318 break;
319 case PCH_GBE_FC_FULL:
320 rx_fctrl |= PCH_GBE_FL_CTRL_EN;
321 mac->tx_fc_enable = true;
322 break;
323 default:
324 pr_err("Flow control param set incorrectly\n");
325 return -EINVAL;
326 }
327 if (mac->link_duplex == DUPLEX_HALF)
328 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
329 iowrite32(rx_fctrl, &hw->reg->RX_FCTRL);
330 pr_debug("RX_FCTRL reg : 0x%08x mac->tx_fc_enable : %d\n",
331 ioread32(&hw->reg->RX_FCTRL), mac->tx_fc_enable);
332 return 0;
333 }
334
335 /**
336 * pch_gbe_mac_set_wol_event - Set wake-on-lan event
337 * @hw: Pointer to the HW structure
338 * @wu_evt: Wake up event
339 */
340 static void pch_gbe_mac_set_wol_event(struct pch_gbe_hw *hw, u32 wu_evt)
341 {
342 u32 addr_mask;
343
344 pr_debug("wu_evt : 0x%08x ADDR_MASK reg : 0x%08x\n",
345 wu_evt, ioread32(&hw->reg->ADDR_MASK));
346
347 if (wu_evt) {
348 /* Set Wake-On-Lan address mask */
349 addr_mask = ioread32(&hw->reg->ADDR_MASK);
350 iowrite32(addr_mask, &hw->reg->WOL_ADDR_MASK);
351 /* wait busy */
352 pch_gbe_wait_clr_bit(&hw->reg->WOL_ADDR_MASK, PCH_GBE_WLA_BUSY);
353 iowrite32(0, &hw->reg->WOL_ST);
354 iowrite32((wu_evt | PCH_GBE_WLC_WOL_MODE), &hw->reg->WOL_CTRL);
355 iowrite32(0x02, &hw->reg->TCPIP_ACC);
356 iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
357 } else {
358 iowrite32(0, &hw->reg->WOL_CTRL);
359 iowrite32(0, &hw->reg->WOL_ST);
360 }
361 return;
362 }
363
364 /**
365 * pch_gbe_mac_ctrl_miim - Control MIIM interface
366 * @hw: Pointer to the HW structure
367 * @addr: Address of PHY
368 * @dir: Operetion. (Write or Read)
369 * @reg: Access register of PHY
370 * @data: Write data.
371 *
372 * Returns: Read date.
373 */
374 u16 pch_gbe_mac_ctrl_miim(struct pch_gbe_hw *hw, u32 addr, u32 dir, u32 reg,
375 u16 data)
376 {
377 u32 data_out = 0;
378 unsigned int i;
379 unsigned long flags;
380
381 spin_lock_irqsave(&hw->miim_lock, flags);
382
383 for (i = 100; i; --i) {
384 if ((ioread32(&hw->reg->MIIM) & PCH_GBE_MIIM_OPER_READY))
385 break;
386 udelay(20);
387 }
388 if (i == 0) {
389 pr_err("pch-gbe.miim won't go Ready\n");
390 spin_unlock_irqrestore(&hw->miim_lock, flags);
391 return 0; /* No way to indicate timeout error */
392 }
393 iowrite32(((reg << PCH_GBE_MIIM_REG_ADDR_SHIFT) |
394 (addr << PCH_GBE_MIIM_PHY_ADDR_SHIFT) |
395 dir | data), &hw->reg->MIIM);
396 for (i = 0; i < 100; i++) {
397 udelay(20);
398 data_out = ioread32(&hw->reg->MIIM);
399 if ((data_out & PCH_GBE_MIIM_OPER_READY))
400 break;
401 }
402 spin_unlock_irqrestore(&hw->miim_lock, flags);
403
404 pr_debug("PHY %s: reg=%d, data=0x%04X\n",
405 dir == PCH_GBE_MIIM_OPER_READ ? "READ" : "WRITE", reg,
406 dir == PCH_GBE_MIIM_OPER_READ ? data_out : data);
407 return (u16) data_out;
408 }
409
410 /**
411 * pch_gbe_mac_set_pause_packet - Set pause packet
412 * @hw: Pointer to the HW structure
413 */
414 static void pch_gbe_mac_set_pause_packet(struct pch_gbe_hw *hw)
415 {
416 unsigned long tmp2, tmp3;
417
418 /* Set Pause packet */
419 tmp2 = hw->mac.addr[1];
420 tmp2 = (tmp2 << 8) | hw->mac.addr[0];
421 tmp2 = PCH_GBE_PAUSE_PKT2_VALUE | (tmp2 << 16);
422
423 tmp3 = hw->mac.addr[5];
424 tmp3 = (tmp3 << 8) | hw->mac.addr[4];
425 tmp3 = (tmp3 << 8) | hw->mac.addr[3];
426 tmp3 = (tmp3 << 8) | hw->mac.addr[2];
427
428 iowrite32(PCH_GBE_PAUSE_PKT1_VALUE, &hw->reg->PAUSE_PKT1);
429 iowrite32(tmp2, &hw->reg->PAUSE_PKT2);
430 iowrite32(tmp3, &hw->reg->PAUSE_PKT3);
431 iowrite32(PCH_GBE_PAUSE_PKT4_VALUE, &hw->reg->PAUSE_PKT4);
432 iowrite32(PCH_GBE_PAUSE_PKT5_VALUE, &hw->reg->PAUSE_PKT5);
433
434 /* Transmit Pause Packet */
435 iowrite32(PCH_GBE_PS_PKT_RQ, &hw->reg->PAUSE_REQ);
436
437 pr_debug("PAUSE_PKT1-5 reg : 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n",
438 ioread32(&hw->reg->PAUSE_PKT1), ioread32(&hw->reg->PAUSE_PKT2),
439 ioread32(&hw->reg->PAUSE_PKT3), ioread32(&hw->reg->PAUSE_PKT4),
440 ioread32(&hw->reg->PAUSE_PKT5));
441
442 return;
443 }
444
445
446 /**
447 * pch_gbe_alloc_queues - Allocate memory for all rings
448 * @adapter: Board private structure to initialize
449 * Returns
450 * 0: Successfully
451 * Negative value: Failed
452 */
453 static int pch_gbe_alloc_queues(struct pch_gbe_adapter *adapter)
454 {
455 int size;
456
457 size = (int)sizeof(struct pch_gbe_tx_ring);
458 adapter->tx_ring = kzalloc(size, GFP_KERNEL);
459 if (!adapter->tx_ring)
460 return -ENOMEM;
461 size = (int)sizeof(struct pch_gbe_rx_ring);
462 adapter->rx_ring = kzalloc(size, GFP_KERNEL);
463 if (!adapter->rx_ring) {
464 kfree(adapter->tx_ring);
465 return -ENOMEM;
466 }
467 return 0;
468 }
469
470 /**
471 * pch_gbe_init_stats - Initialize status
472 * @adapter: Board private structure to initialize
473 */
474 static void pch_gbe_init_stats(struct pch_gbe_adapter *adapter)
475 {
476 memset(&adapter->stats, 0, sizeof(adapter->stats));
477 return;
478 }
479
480 /**
481 * pch_gbe_init_phy - Initialize PHY
482 * @adapter: Board private structure to initialize
483 * Returns
484 * 0: Successfully
485 * Negative value: Failed
486 */
487 static int pch_gbe_init_phy(struct pch_gbe_adapter *adapter)
488 {
489 struct net_device *netdev = adapter->netdev;
490 u32 addr;
491 u16 bmcr, stat;
492
493 /* Discover phy addr by searching addrs in order {1,0,2,..., 31} */
494 for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
495 adapter->mii.phy_id = (addr == 0) ? 1 : (addr == 1) ? 0 : addr;
496 bmcr = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMCR);
497 stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
498 stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
499 if (!((bmcr == 0xFFFF) || ((stat == 0) && (bmcr == 0))))
500 break;
501 }
502 adapter->hw.phy.addr = adapter->mii.phy_id;
503 pr_debug("phy_addr = %d\n", adapter->mii.phy_id);
504 if (addr == 32)
505 return -EAGAIN;
506 /* Selected the phy and isolate the rest */
507 for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
508 if (addr != adapter->mii.phy_id) {
509 pch_gbe_mdio_write(netdev, addr, MII_BMCR,
510 BMCR_ISOLATE);
511 } else {
512 bmcr = pch_gbe_mdio_read(netdev, addr, MII_BMCR);
513 pch_gbe_mdio_write(netdev, addr, MII_BMCR,
514 bmcr & ~BMCR_ISOLATE);
515 }
516 }
517
518 /* MII setup */
519 adapter->mii.phy_id_mask = 0x1F;
520 adapter->mii.reg_num_mask = 0x1F;
521 adapter->mii.dev = adapter->netdev;
522 adapter->mii.mdio_read = pch_gbe_mdio_read;
523 adapter->mii.mdio_write = pch_gbe_mdio_write;
524 adapter->mii.supports_gmii = mii_check_gmii_support(&adapter->mii);
525 return 0;
526 }
527
528 /**
529 * pch_gbe_mdio_read - The read function for mii
530 * @netdev: Network interface device structure
531 * @addr: Phy ID
532 * @reg: Access location
533 * Returns
534 * 0: Successfully
535 * Negative value: Failed
536 */
537 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg)
538 {
539 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
540 struct pch_gbe_hw *hw = &adapter->hw;
541
542 return pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_READ, reg,
543 (u16) 0);
544 }
545
546 /**
547 * pch_gbe_mdio_write - The write function for mii
548 * @netdev: Network interface device structure
549 * @addr: Phy ID (not used)
550 * @reg: Access location
551 * @data: Write data
552 */
553 static void pch_gbe_mdio_write(struct net_device *netdev,
554 int addr, int reg, int data)
555 {
556 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
557 struct pch_gbe_hw *hw = &adapter->hw;
558
559 pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_WRITE, reg, data);
560 }
561
562 /**
563 * pch_gbe_reset_task - Reset processing at the time of transmission timeout
564 * @work: Pointer of board private structure
565 */
566 static void pch_gbe_reset_task(struct work_struct *work)
567 {
568 struct pch_gbe_adapter *adapter;
569 adapter = container_of(work, struct pch_gbe_adapter, reset_task);
570
571 rtnl_lock();
572 pch_gbe_reinit_locked(adapter);
573 rtnl_unlock();
574 }
575
576 /**
577 * pch_gbe_reinit_locked- Re-initialization
578 * @adapter: Board private structure
579 */
580 void pch_gbe_reinit_locked(struct pch_gbe_adapter *adapter)
581 {
582 pch_gbe_down(adapter);
583 pch_gbe_up(adapter);
584 }
585
586 /**
587 * pch_gbe_reset - Reset GbE
588 * @adapter: Board private structure
589 */
590 void pch_gbe_reset(struct pch_gbe_adapter *adapter)
591 {
592 pch_gbe_mac_reset_hw(&adapter->hw);
593 /* Setup the receive address. */
594 pch_gbe_mac_init_rx_addrs(&adapter->hw, PCH_GBE_MAR_ENTRIES);
595 if (pch_gbe_hal_init_hw(&adapter->hw))
596 pr_err("Hardware Error\n");
597 }
598
599 /**
600 * pch_gbe_free_irq - Free an interrupt
601 * @adapter: Board private structure
602 */
603 static void pch_gbe_free_irq(struct pch_gbe_adapter *adapter)
604 {
605 struct net_device *netdev = adapter->netdev;
606
607 free_irq(adapter->pdev->irq, netdev);
608 if (adapter->have_msi) {
609 pci_disable_msi(adapter->pdev);
610 pr_debug("call pci_disable_msi\n");
611 }
612 }
613
614 /**
615 * pch_gbe_irq_disable - Mask off interrupt generation on the NIC
616 * @adapter: Board private structure
617 */
618 static void pch_gbe_irq_disable(struct pch_gbe_adapter *adapter)
619 {
620 struct pch_gbe_hw *hw = &adapter->hw;
621
622 atomic_inc(&adapter->irq_sem);
623 iowrite32(0, &hw->reg->INT_EN);
624 ioread32(&hw->reg->INT_ST);
625 synchronize_irq(adapter->pdev->irq);
626
627 pr_debug("INT_EN reg : 0x%08x\n", ioread32(&hw->reg->INT_EN));
628 }
629
630 /**
631 * pch_gbe_irq_enable - Enable default interrupt generation settings
632 * @adapter: Board private structure
633 */
634 static void pch_gbe_irq_enable(struct pch_gbe_adapter *adapter)
635 {
636 struct pch_gbe_hw *hw = &adapter->hw;
637
638 if (likely(atomic_dec_and_test(&adapter->irq_sem)))
639 iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
640 ioread32(&hw->reg->INT_ST);
641 pr_debug("INT_EN reg : 0x%08x\n", ioread32(&hw->reg->INT_EN));
642 }
643
644
645
646 /**
647 * pch_gbe_setup_tctl - configure the Transmit control registers
648 * @adapter: Board private structure
649 */
650 static void pch_gbe_setup_tctl(struct pch_gbe_adapter *adapter)
651 {
652 struct pch_gbe_hw *hw = &adapter->hw;
653 u32 tx_mode, tcpip;
654
655 tx_mode = PCH_GBE_TM_LONG_PKT |
656 PCH_GBE_TM_ST_AND_FD |
657 PCH_GBE_TM_SHORT_PKT |
658 PCH_GBE_TM_TH_TX_STRT_8 |
659 PCH_GBE_TM_TH_ALM_EMP_4 | PCH_GBE_TM_TH_ALM_FULL_8;
660
661 iowrite32(tx_mode, &hw->reg->TX_MODE);
662
663 tcpip = ioread32(&hw->reg->TCPIP_ACC);
664 tcpip |= PCH_GBE_TX_TCPIPACC_EN;
665 iowrite32(tcpip, &hw->reg->TCPIP_ACC);
666 return;
667 }
668
669 /**
670 * pch_gbe_configure_tx - Configure Transmit Unit after Reset
671 * @adapter: Board private structure
672 */
673 static void pch_gbe_configure_tx(struct pch_gbe_adapter *adapter)
674 {
675 struct pch_gbe_hw *hw = &adapter->hw;
676 u32 tdba, tdlen, dctrl;
677
678 pr_debug("dma addr = 0x%08llx size = 0x%08x\n",
679 (unsigned long long)adapter->tx_ring->dma,
680 adapter->tx_ring->size);
681
682 /* Setup the HW Tx Head and Tail descriptor pointers */
683 tdba = adapter->tx_ring->dma;
684 tdlen = adapter->tx_ring->size - 0x10;
685 iowrite32(tdba, &hw->reg->TX_DSC_BASE);
686 iowrite32(tdlen, &hw->reg->TX_DSC_SIZE);
687 iowrite32(tdba, &hw->reg->TX_DSC_SW_P);
688
689 /* Enables Transmission DMA */
690 dctrl = ioread32(&hw->reg->DMA_CTRL);
691 dctrl |= PCH_GBE_TX_DMA_EN;
692 iowrite32(dctrl, &hw->reg->DMA_CTRL);
693 }
694
695 /**
696 * pch_gbe_setup_rctl - Configure the receive control registers
697 * @adapter: Board private structure
698 */
699 static void pch_gbe_setup_rctl(struct pch_gbe_adapter *adapter)
700 {
701 struct net_device *netdev = adapter->netdev;
702 struct pch_gbe_hw *hw = &adapter->hw;
703 u32 rx_mode, tcpip;
704
705 rx_mode = PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN |
706 PCH_GBE_RH_ALM_EMP_4 | PCH_GBE_RH_ALM_FULL_4 | PCH_GBE_RH_RD_TRG_8;
707
708 iowrite32(rx_mode, &hw->reg->RX_MODE);
709
710 tcpip = ioread32(&hw->reg->TCPIP_ACC);
711
712 tcpip |= PCH_GBE_RX_TCPIPACC_OFF;
713 tcpip &= ~PCH_GBE_RX_TCPIPACC_EN;
714 iowrite32(tcpip, &hw->reg->TCPIP_ACC);
715 return;
716 }
717
718 /**
719 * pch_gbe_configure_rx - Configure Receive Unit after Reset
720 * @adapter: Board private structure
721 */
722 static void pch_gbe_configure_rx(struct pch_gbe_adapter *adapter)
723 {
724 struct pch_gbe_hw *hw = &adapter->hw;
725 u32 rdba, rdlen, rctl, rxdma;
726
727 pr_debug("dma adr = 0x%08llx size = 0x%08x\n",
728 (unsigned long long)adapter->rx_ring->dma,
729 adapter->rx_ring->size);
730
731 pch_gbe_mac_force_mac_fc(hw);
732
733 /* Disables Receive MAC */
734 rctl = ioread32(&hw->reg->MAC_RX_EN);
735 iowrite32((rctl & ~PCH_GBE_MRE_MAC_RX_EN), &hw->reg->MAC_RX_EN);
736
737 /* Disables Receive DMA */
738 rxdma = ioread32(&hw->reg->DMA_CTRL);
739 rxdma &= ~PCH_GBE_RX_DMA_EN;
740 iowrite32(rxdma, &hw->reg->DMA_CTRL);
741
742 pr_debug("MAC_RX_EN reg = 0x%08x DMA_CTRL reg = 0x%08x\n",
743 ioread32(&hw->reg->MAC_RX_EN),
744 ioread32(&hw->reg->DMA_CTRL));
745
746 /* Setup the HW Rx Head and Tail Descriptor Pointers and
747 * the Base and Length of the Rx Descriptor Ring */
748 rdba = adapter->rx_ring->dma;
749 rdlen = adapter->rx_ring->size - 0x10;
750 iowrite32(rdba, &hw->reg->RX_DSC_BASE);
751 iowrite32(rdlen, &hw->reg->RX_DSC_SIZE);
752 iowrite32((rdba + rdlen), &hw->reg->RX_DSC_SW_P);
753 }
754
755 /**
756 * pch_gbe_unmap_and_free_tx_resource - Unmap and free tx socket buffer
757 * @adapter: Board private structure
758 * @buffer_info: Buffer information structure
759 */
760 static void pch_gbe_unmap_and_free_tx_resource(
761 struct pch_gbe_adapter *adapter, struct pch_gbe_buffer *buffer_info)
762 {
763 if (buffer_info->mapped) {
764 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
765 buffer_info->length, DMA_TO_DEVICE);
766 buffer_info->mapped = false;
767 }
768 if (buffer_info->skb) {
769 dev_kfree_skb_any(buffer_info->skb);
770 buffer_info->skb = NULL;
771 }
772 }
773
774 /**
775 * pch_gbe_unmap_and_free_rx_resource - Unmap and free rx socket buffer
776 * @adapter: Board private structure
777 * @buffer_info: Buffer information structure
778 */
779 static void pch_gbe_unmap_and_free_rx_resource(
780 struct pch_gbe_adapter *adapter,
781 struct pch_gbe_buffer *buffer_info)
782 {
783 if (buffer_info->mapped) {
784 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
785 buffer_info->length, DMA_FROM_DEVICE);
786 buffer_info->mapped = false;
787 }
788 if (buffer_info->skb) {
789 dev_kfree_skb_any(buffer_info->skb);
790 buffer_info->skb = NULL;
791 }
792 }
793
794 /**
795 * pch_gbe_clean_tx_ring - Free Tx Buffers
796 * @adapter: Board private structure
797 * @tx_ring: Ring to be cleaned
798 */
799 static void pch_gbe_clean_tx_ring(struct pch_gbe_adapter *adapter,
800 struct pch_gbe_tx_ring *tx_ring)
801 {
802 struct pch_gbe_hw *hw = &adapter->hw;
803 struct pch_gbe_buffer *buffer_info;
804 unsigned long size;
805 unsigned int i;
806
807 /* Free all the Tx ring sk_buffs */
808 for (i = 0; i < tx_ring->count; i++) {
809 buffer_info = &tx_ring->buffer_info[i];
810 pch_gbe_unmap_and_free_tx_resource(adapter, buffer_info);
811 }
812 pr_debug("call pch_gbe_unmap_and_free_tx_resource() %d count\n", i);
813
814 size = (unsigned long)sizeof(struct pch_gbe_buffer) * tx_ring->count;
815 memset(tx_ring->buffer_info, 0, size);
816
817 /* Zero out the descriptor ring */
818 memset(tx_ring->desc, 0, tx_ring->size);
819 tx_ring->next_to_use = 0;
820 tx_ring->next_to_clean = 0;
821 iowrite32(tx_ring->dma, &hw->reg->TX_DSC_HW_P);
822 iowrite32((tx_ring->size - 0x10), &hw->reg->TX_DSC_SIZE);
823 }
824
825 /**
826 * pch_gbe_clean_rx_ring - Free Rx Buffers
827 * @adapter: Board private structure
828 * @rx_ring: Ring to free buffers from
829 */
830 static void
831 pch_gbe_clean_rx_ring(struct pch_gbe_adapter *adapter,
832 struct pch_gbe_rx_ring *rx_ring)
833 {
834 struct pch_gbe_hw *hw = &adapter->hw;
835 struct pch_gbe_buffer *buffer_info;
836 unsigned long size;
837 unsigned int i;
838
839 /* Free all the Rx ring sk_buffs */
840 for (i = 0; i < rx_ring->count; i++) {
841 buffer_info = &rx_ring->buffer_info[i];
842 pch_gbe_unmap_and_free_rx_resource(adapter, buffer_info);
843 }
844 pr_debug("call pch_gbe_unmap_and_free_rx_resource() %d count\n", i);
845 size = (unsigned long)sizeof(struct pch_gbe_buffer) * rx_ring->count;
846 memset(rx_ring->buffer_info, 0, size);
847
848 /* Zero out the descriptor ring */
849 memset(rx_ring->desc, 0, rx_ring->size);
850 rx_ring->next_to_clean = 0;
851 rx_ring->next_to_use = 0;
852 iowrite32(rx_ring->dma, &hw->reg->RX_DSC_HW_P);
853 iowrite32((rx_ring->size - 0x10), &hw->reg->RX_DSC_SIZE);
854 }
855
856 static void pch_gbe_set_rgmii_ctrl(struct pch_gbe_adapter *adapter, u16 speed,
857 u16 duplex)
858 {
859 struct pch_gbe_hw *hw = &adapter->hw;
860 unsigned long rgmii = 0;
861
862 /* Set the RGMII control. */
863 #ifdef PCH_GBE_MAC_IFOP_RGMII
864 switch (speed) {
865 case SPEED_10:
866 rgmii = (PCH_GBE_RGMII_RATE_2_5M |
867 PCH_GBE_MAC_RGMII_CTRL_SETTING);
868 break;
869 case SPEED_100:
870 rgmii = (PCH_GBE_RGMII_RATE_25M |
871 PCH_GBE_MAC_RGMII_CTRL_SETTING);
872 break;
873 case SPEED_1000:
874 rgmii = (PCH_GBE_RGMII_RATE_125M |
875 PCH_GBE_MAC_RGMII_CTRL_SETTING);
876 break;
877 }
878 iowrite32(rgmii, &hw->reg->RGMII_CTRL);
879 #else /* GMII */
880 rgmii = 0;
881 iowrite32(rgmii, &hw->reg->RGMII_CTRL);
882 #endif
883 }
884 static void pch_gbe_set_mode(struct pch_gbe_adapter *adapter, u16 speed,
885 u16 duplex)
886 {
887 struct net_device *netdev = adapter->netdev;
888 struct pch_gbe_hw *hw = &adapter->hw;
889 unsigned long mode = 0;
890
891 /* Set the communication mode */
892 switch (speed) {
893 case SPEED_10:
894 mode = PCH_GBE_MODE_MII_ETHER;
895 netdev->tx_queue_len = 10;
896 break;
897 case SPEED_100:
898 mode = PCH_GBE_MODE_MII_ETHER;
899 netdev->tx_queue_len = 100;
900 break;
901 case SPEED_1000:
902 mode = PCH_GBE_MODE_GMII_ETHER;
903 break;
904 }
905 if (duplex == DUPLEX_FULL)
906 mode |= PCH_GBE_MODE_FULL_DUPLEX;
907 else
908 mode |= PCH_GBE_MODE_HALF_DUPLEX;
909 iowrite32(mode, &hw->reg->MODE);
910 }
911
912 /**
913 * pch_gbe_watchdog - Watchdog process
914 * @data: Board private structure
915 */
916 static void pch_gbe_watchdog(unsigned long data)
917 {
918 struct pch_gbe_adapter *adapter = (struct pch_gbe_adapter *)data;
919 struct net_device *netdev = adapter->netdev;
920 struct pch_gbe_hw *hw = &adapter->hw;
921
922 pr_debug("right now = %ld\n", jiffies);
923
924 pch_gbe_update_stats(adapter);
925 if ((mii_link_ok(&adapter->mii)) && (!netif_carrier_ok(netdev))) {
926 struct ethtool_cmd cmd = { .cmd = ETHTOOL_GSET };
927 netdev->tx_queue_len = adapter->tx_queue_len;
928 /* mii library handles link maintenance tasks */
929 if (mii_ethtool_gset(&adapter->mii, &cmd)) {
930 pr_err("ethtool get setting Error\n");
931 mod_timer(&adapter->watchdog_timer,
932 round_jiffies(jiffies +
933 PCH_GBE_WATCHDOG_PERIOD));
934 return;
935 }
936 hw->mac.link_speed = ethtool_cmd_speed(&cmd);
937 hw->mac.link_duplex = cmd.duplex;
938 /* Set the RGMII control. */
939 pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
940 hw->mac.link_duplex);
941 /* Set the communication mode */
942 pch_gbe_set_mode(adapter, hw->mac.link_speed,
943 hw->mac.link_duplex);
944 netdev_dbg(netdev,
945 "Link is Up %d Mbps %s-Duplex\n",
946 hw->mac.link_speed,
947 cmd.duplex == DUPLEX_FULL ? "Full" : "Half");
948 netif_carrier_on(netdev);
949 netif_wake_queue(netdev);
950 } else if ((!mii_link_ok(&adapter->mii)) &&
951 (netif_carrier_ok(netdev))) {
952 netdev_dbg(netdev, "NIC Link is Down\n");
953 hw->mac.link_speed = SPEED_10;
954 hw->mac.link_duplex = DUPLEX_HALF;
955 netif_carrier_off(netdev);
956 netif_stop_queue(netdev);
957 }
958 mod_timer(&adapter->watchdog_timer,
959 round_jiffies(jiffies + PCH_GBE_WATCHDOG_PERIOD));
960 }
961
962 /**
963 * pch_gbe_tx_queue - Carry out queuing of the transmission data
964 * @adapter: Board private structure
965 * @tx_ring: Tx descriptor ring structure
966 * @skb: Sockt buffer structure
967 */
968 static void pch_gbe_tx_queue(struct pch_gbe_adapter *adapter,
969 struct pch_gbe_tx_ring *tx_ring,
970 struct sk_buff *skb)
971 {
972 struct pch_gbe_hw *hw = &adapter->hw;
973 struct pch_gbe_tx_desc *tx_desc;
974 struct pch_gbe_buffer *buffer_info;
975 struct sk_buff *tmp_skb;
976 unsigned int frame_ctrl;
977 unsigned int ring_num;
978 unsigned long flags;
979
980 /*-- Set frame control --*/
981 frame_ctrl = 0;
982 if (unlikely(skb->len < PCH_GBE_SHORT_PKT))
983 frame_ctrl |= PCH_GBE_TXD_CTRL_APAD;
984 if (skb->ip_summed == CHECKSUM_NONE)
985 frame_ctrl |= PCH_GBE_TXD_CTRL_TCPIP_ACC_OFF;
986
987 /* Performs checksum processing */
988 /*
989 * It is because the hardware accelerator does not support a checksum,
990 * when the received data size is less than 64 bytes.
991 */
992 if (skb->len < PCH_GBE_SHORT_PKT && skb->ip_summed != CHECKSUM_NONE) {
993 frame_ctrl |= PCH_GBE_TXD_CTRL_APAD |
994 PCH_GBE_TXD_CTRL_TCPIP_ACC_OFF;
995 if (skb->protocol == htons(ETH_P_IP)) {
996 struct iphdr *iph = ip_hdr(skb);
997 unsigned int offset;
998 iph->check = 0;
999 iph->check = ip_fast_csum((u8 *) iph, iph->ihl);
1000 offset = skb_transport_offset(skb);
1001 if (iph->protocol == IPPROTO_TCP) {
1002 skb->csum = 0;
1003 tcp_hdr(skb)->check = 0;
1004 skb->csum = skb_checksum(skb, offset,
1005 skb->len - offset, 0);
1006 tcp_hdr(skb)->check =
1007 csum_tcpudp_magic(iph->saddr,
1008 iph->daddr,
1009 skb->len - offset,
1010 IPPROTO_TCP,
1011 skb->csum);
1012 } else if (iph->protocol == IPPROTO_UDP) {
1013 skb->csum = 0;
1014 udp_hdr(skb)->check = 0;
1015 skb->csum =
1016 skb_checksum(skb, offset,
1017 skb->len - offset, 0);
1018 udp_hdr(skb)->check =
1019 csum_tcpudp_magic(iph->saddr,
1020 iph->daddr,
1021 skb->len - offset,
1022 IPPROTO_UDP,
1023 skb->csum);
1024 }
1025 }
1026 }
1027 spin_lock_irqsave(&tx_ring->tx_lock, flags);
1028 ring_num = tx_ring->next_to_use;
1029 if (unlikely((ring_num + 1) == tx_ring->count))
1030 tx_ring->next_to_use = 0;
1031 else
1032 tx_ring->next_to_use = ring_num + 1;
1033
1034 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1035 buffer_info = &tx_ring->buffer_info[ring_num];
1036 tmp_skb = buffer_info->skb;
1037
1038 /* [Header:14][payload] ---> [Header:14][paddong:2][payload] */
1039 memcpy(tmp_skb->data, skb->data, ETH_HLEN);
1040 tmp_skb->data[ETH_HLEN] = 0x00;
1041 tmp_skb->data[ETH_HLEN + 1] = 0x00;
1042 tmp_skb->len = skb->len;
1043 memcpy(&tmp_skb->data[ETH_HLEN + 2], &skb->data[ETH_HLEN],
1044 (skb->len - ETH_HLEN));
1045 /*-- Set Buffer information --*/
1046 buffer_info->length = tmp_skb->len;
1047 buffer_info->dma = dma_map_single(&adapter->pdev->dev, tmp_skb->data,
1048 buffer_info->length,
1049 DMA_TO_DEVICE);
1050 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
1051 pr_err("TX DMA map failed\n");
1052 buffer_info->dma = 0;
1053 buffer_info->time_stamp = 0;
1054 tx_ring->next_to_use = ring_num;
1055 return;
1056 }
1057 buffer_info->mapped = true;
1058 buffer_info->time_stamp = jiffies;
1059
1060 /*-- Set Tx descriptor --*/
1061 tx_desc = PCH_GBE_TX_DESC(*tx_ring, ring_num);
1062 tx_desc->buffer_addr = (buffer_info->dma);
1063 tx_desc->length = (tmp_skb->len);
1064 tx_desc->tx_words_eob = ((tmp_skb->len + 3));
1065 tx_desc->tx_frame_ctrl = (frame_ctrl);
1066 tx_desc->gbec_status = (DSC_INIT16);
1067
1068 if (unlikely(++ring_num == tx_ring->count))
1069 ring_num = 0;
1070
1071 /* Update software pointer of TX descriptor */
1072 iowrite32(tx_ring->dma +
1073 (int)sizeof(struct pch_gbe_tx_desc) * ring_num,
1074 &hw->reg->TX_DSC_SW_P);
1075 dev_kfree_skb_any(skb);
1076 }
1077
1078 /**
1079 * pch_gbe_update_stats - Update the board statistics counters
1080 * @adapter: Board private structure
1081 */
1082 void pch_gbe_update_stats(struct pch_gbe_adapter *adapter)
1083 {
1084 struct net_device *netdev = adapter->netdev;
1085 struct pci_dev *pdev = adapter->pdev;
1086 struct pch_gbe_hw_stats *stats = &adapter->stats;
1087 unsigned long flags;
1088
1089 /*
1090 * Prevent stats update while adapter is being reset, or if the pci
1091 * connection is down.
1092 */
1093 if ((pdev->error_state) && (pdev->error_state != pci_channel_io_normal))
1094 return;
1095
1096 spin_lock_irqsave(&adapter->stats_lock, flags);
1097
1098 /* Update device status "adapter->stats" */
1099 stats->rx_errors = stats->rx_crc_errors + stats->rx_frame_errors;
1100 stats->tx_errors = stats->tx_length_errors +
1101 stats->tx_aborted_errors +
1102 stats->tx_carrier_errors + stats->tx_timeout_count;
1103
1104 /* Update network device status "adapter->net_stats" */
1105 netdev->stats.rx_packets = stats->rx_packets;
1106 netdev->stats.rx_bytes = stats->rx_bytes;
1107 netdev->stats.rx_dropped = stats->rx_dropped;
1108 netdev->stats.tx_packets = stats->tx_packets;
1109 netdev->stats.tx_bytes = stats->tx_bytes;
1110 netdev->stats.tx_dropped = stats->tx_dropped;
1111 /* Fill out the OS statistics structure */
1112 netdev->stats.multicast = stats->multicast;
1113 netdev->stats.collisions = stats->collisions;
1114 /* Rx Errors */
1115 netdev->stats.rx_errors = stats->rx_errors;
1116 netdev->stats.rx_crc_errors = stats->rx_crc_errors;
1117 netdev->stats.rx_frame_errors = stats->rx_frame_errors;
1118 /* Tx Errors */
1119 netdev->stats.tx_errors = stats->tx_errors;
1120 netdev->stats.tx_aborted_errors = stats->tx_aborted_errors;
1121 netdev->stats.tx_carrier_errors = stats->tx_carrier_errors;
1122
1123 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1124 }
1125
1126 static void pch_gbe_stop_receive(struct pch_gbe_adapter *adapter)
1127 {
1128 struct pch_gbe_hw *hw = &adapter->hw;
1129 u32 rxdma;
1130 u16 value;
1131 int ret;
1132
1133 /* Disable Receive DMA */
1134 rxdma = ioread32(&hw->reg->DMA_CTRL);
1135 rxdma &= ~PCH_GBE_RX_DMA_EN;
1136 iowrite32(rxdma, &hw->reg->DMA_CTRL);
1137 /* Wait Rx DMA BUS is IDLE */
1138 ret = pch_gbe_wait_clr_bit_irq(&hw->reg->RX_DMA_ST, PCH_GBE_IDLE_CHECK);
1139 if (ret) {
1140 /* Disable Bus master */
1141 pci_read_config_word(adapter->pdev, PCI_COMMAND, &value);
1142 value &= ~PCI_COMMAND_MASTER;
1143 pci_write_config_word(adapter->pdev, PCI_COMMAND, value);
1144 /* Stop Receive */
1145 pch_gbe_mac_reset_rx(hw);
1146 /* Enable Bus master */
1147 value |= PCI_COMMAND_MASTER;
1148 pci_write_config_word(adapter->pdev, PCI_COMMAND, value);
1149 } else {
1150 /* Stop Receive */
1151 pch_gbe_mac_reset_rx(hw);
1152 }
1153 }
1154
1155 static void pch_gbe_start_receive(struct pch_gbe_hw *hw)
1156 {
1157 u32 rxdma;
1158
1159 /* Enables Receive DMA */
1160 rxdma = ioread32(&hw->reg->DMA_CTRL);
1161 rxdma |= PCH_GBE_RX_DMA_EN;
1162 iowrite32(rxdma, &hw->reg->DMA_CTRL);
1163 /* Enables Receive */
1164 iowrite32(PCH_GBE_MRE_MAC_RX_EN, &hw->reg->MAC_RX_EN);
1165 return;
1166 }
1167
1168 /**
1169 * pch_gbe_intr - Interrupt Handler
1170 * @irq: Interrupt number
1171 * @data: Pointer to a network interface device structure
1172 * Returns
1173 * - IRQ_HANDLED: Our interrupt
1174 * - IRQ_NONE: Not our interrupt
1175 */
1176 static irqreturn_t pch_gbe_intr(int irq, void *data)
1177 {
1178 struct net_device *netdev = data;
1179 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1180 struct pch_gbe_hw *hw = &adapter->hw;
1181 u32 int_st;
1182 u32 int_en;
1183
1184 /* Check request status */
1185 int_st = ioread32(&hw->reg->INT_ST);
1186 int_st = int_st & ioread32(&hw->reg->INT_EN);
1187 /* When request status is no interruption factor */
1188 if (unlikely(!int_st))
1189 return IRQ_NONE; /* Not our interrupt. End processing. */
1190 pr_debug("%s occur int_st = 0x%08x\n", __func__, int_st);
1191 if (int_st & PCH_GBE_INT_RX_FRAME_ERR)
1192 adapter->stats.intr_rx_frame_err_count++;
1193 if (int_st & PCH_GBE_INT_RX_FIFO_ERR)
1194 if (!adapter->rx_stop_flag) {
1195 adapter->stats.intr_rx_fifo_err_count++;
1196 pr_debug("Rx fifo over run\n");
1197 adapter->rx_stop_flag = true;
1198 int_en = ioread32(&hw->reg->INT_EN);
1199 iowrite32((int_en & ~PCH_GBE_INT_RX_FIFO_ERR),
1200 &hw->reg->INT_EN);
1201 pch_gbe_stop_receive(adapter);
1202 }
1203 if (int_st & PCH_GBE_INT_RX_DMA_ERR)
1204 adapter->stats.intr_rx_dma_err_count++;
1205 if (int_st & PCH_GBE_INT_TX_FIFO_ERR)
1206 adapter->stats.intr_tx_fifo_err_count++;
1207 if (int_st & PCH_GBE_INT_TX_DMA_ERR)
1208 adapter->stats.intr_tx_dma_err_count++;
1209 if (int_st & PCH_GBE_INT_TCPIP_ERR)
1210 adapter->stats.intr_tcpip_err_count++;
1211 /* When Rx descriptor is empty */
1212 if ((int_st & PCH_GBE_INT_RX_DSC_EMP)) {
1213 adapter->stats.intr_rx_dsc_empty_count++;
1214 pr_debug("Rx descriptor is empty\n");
1215 int_en = ioread32(&hw->reg->INT_EN);
1216 iowrite32((int_en & ~PCH_GBE_INT_RX_DSC_EMP), &hw->reg->INT_EN);
1217 if (hw->mac.tx_fc_enable) {
1218 /* Set Pause packet */
1219 pch_gbe_mac_set_pause_packet(hw);
1220 }
1221 if ((int_en & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT))
1222 == 0) {
1223 return IRQ_HANDLED;
1224 }
1225 }
1226
1227 /* When request status is Receive interruption */
1228 if ((int_st & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT))) {
1229 if (likely(napi_schedule_prep(&adapter->napi))) {
1230 /* Enable only Rx Descriptor empty */
1231 atomic_inc(&adapter->irq_sem);
1232 int_en = ioread32(&hw->reg->INT_EN);
1233 int_en &=
1234 ~(PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT);
1235 iowrite32(int_en, &hw->reg->INT_EN);
1236 /* Start polling for NAPI */
1237 __napi_schedule(&adapter->napi);
1238 }
1239 }
1240 pr_debug("return = 0x%08x INT_EN reg = 0x%08x\n",
1241 IRQ_HANDLED, ioread32(&hw->reg->INT_EN));
1242 return IRQ_HANDLED;
1243 }
1244
1245 /**
1246 * pch_gbe_alloc_rx_buffers - Replace used receive buffers; legacy & extended
1247 * @adapter: Board private structure
1248 * @rx_ring: Rx descriptor ring
1249 * @cleaned_count: Cleaned count
1250 */
1251 static void
1252 pch_gbe_alloc_rx_buffers(struct pch_gbe_adapter *adapter,
1253 struct pch_gbe_rx_ring *rx_ring, int cleaned_count)
1254 {
1255 struct net_device *netdev = adapter->netdev;
1256 struct pci_dev *pdev = adapter->pdev;
1257 struct pch_gbe_hw *hw = &adapter->hw;
1258 struct pch_gbe_rx_desc *rx_desc;
1259 struct pch_gbe_buffer *buffer_info;
1260 struct sk_buff *skb;
1261 unsigned int i;
1262 unsigned int bufsz;
1263
1264 bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
1265 i = rx_ring->next_to_use;
1266
1267 while ((cleaned_count--)) {
1268 buffer_info = &rx_ring->buffer_info[i];
1269 skb = netdev_alloc_skb(netdev, bufsz);
1270 if (unlikely(!skb)) {
1271 /* Better luck next round */
1272 adapter->stats.rx_alloc_buff_failed++;
1273 break;
1274 }
1275 /* align */
1276 skb_reserve(skb, NET_IP_ALIGN);
1277 buffer_info->skb = skb;
1278
1279 buffer_info->dma = dma_map_single(&pdev->dev,
1280 buffer_info->rx_buffer,
1281 buffer_info->length,
1282 DMA_FROM_DEVICE);
1283 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
1284 dev_kfree_skb(skb);
1285 buffer_info->skb = NULL;
1286 buffer_info->dma = 0;
1287 adapter->stats.rx_alloc_buff_failed++;
1288 break; /* while !buffer_info->skb */
1289 }
1290 buffer_info->mapped = true;
1291 rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
1292 rx_desc->buffer_addr = (buffer_info->dma);
1293 rx_desc->gbec_status = DSC_INIT16;
1294
1295 pr_debug("i = %d buffer_info->dma = 0x08%llx buffer_info->length = 0x%x\n",
1296 i, (unsigned long long)buffer_info->dma,
1297 buffer_info->length);
1298
1299 if (unlikely(++i == rx_ring->count))
1300 i = 0;
1301 }
1302 if (likely(rx_ring->next_to_use != i)) {
1303 rx_ring->next_to_use = i;
1304 if (unlikely(i-- == 0))
1305 i = (rx_ring->count - 1);
1306 iowrite32(rx_ring->dma +
1307 (int)sizeof(struct pch_gbe_rx_desc) * i,
1308 &hw->reg->RX_DSC_SW_P);
1309 }
1310 return;
1311 }
1312
1313 static int
1314 pch_gbe_alloc_rx_buffers_pool(struct pch_gbe_adapter *adapter,
1315 struct pch_gbe_rx_ring *rx_ring, int cleaned_count)
1316 {
1317 struct pci_dev *pdev = adapter->pdev;
1318 struct pch_gbe_buffer *buffer_info;
1319 unsigned int i;
1320 unsigned int bufsz;
1321 unsigned int size;
1322
1323 bufsz = adapter->rx_buffer_len;
1324
1325 size = rx_ring->count * bufsz + PCH_GBE_RESERVE_MEMORY;
1326 rx_ring->rx_buff_pool = dma_alloc_coherent(&pdev->dev, size,
1327 &rx_ring->rx_buff_pool_logic,
1328 GFP_KERNEL);
1329 if (!rx_ring->rx_buff_pool) {
1330 pr_err("Unable to allocate memory for the receive poll buffer\n");
1331 return -ENOMEM;
1332 }
1333 memset(rx_ring->rx_buff_pool, 0, size);
1334 rx_ring->rx_buff_pool_size = size;
1335 for (i = 0; i < rx_ring->count; i++) {
1336 buffer_info = &rx_ring->buffer_info[i];
1337 buffer_info->rx_buffer = rx_ring->rx_buff_pool + bufsz * i;
1338 buffer_info->length = bufsz;
1339 }
1340 return 0;
1341 }
1342
1343 /**
1344 * pch_gbe_alloc_tx_buffers - Allocate transmit buffers
1345 * @adapter: Board private structure
1346 * @tx_ring: Tx descriptor ring
1347 */
1348 static void pch_gbe_alloc_tx_buffers(struct pch_gbe_adapter *adapter,
1349 struct pch_gbe_tx_ring *tx_ring)
1350 {
1351 struct pch_gbe_buffer *buffer_info;
1352 struct sk_buff *skb;
1353 unsigned int i;
1354 unsigned int bufsz;
1355 struct pch_gbe_tx_desc *tx_desc;
1356
1357 bufsz =
1358 adapter->hw.mac.max_frame_size + PCH_GBE_DMA_ALIGN + NET_IP_ALIGN;
1359
1360 for (i = 0; i < tx_ring->count; i++) {
1361 buffer_info = &tx_ring->buffer_info[i];
1362 skb = netdev_alloc_skb(adapter->netdev, bufsz);
1363 skb_reserve(skb, PCH_GBE_DMA_ALIGN);
1364 buffer_info->skb = skb;
1365 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1366 tx_desc->gbec_status = (DSC_INIT16);
1367 }
1368 return;
1369 }
1370
1371 /**
1372 * pch_gbe_clean_tx - Reclaim resources after transmit completes
1373 * @adapter: Board private structure
1374 * @tx_ring: Tx descriptor ring
1375 * Returns
1376 * true: Cleaned the descriptor
1377 * false: Not cleaned the descriptor
1378 */
1379 static bool
1380 pch_gbe_clean_tx(struct pch_gbe_adapter *adapter,
1381 struct pch_gbe_tx_ring *tx_ring)
1382 {
1383 struct pch_gbe_tx_desc *tx_desc;
1384 struct pch_gbe_buffer *buffer_info;
1385 struct sk_buff *skb;
1386 unsigned int i;
1387 unsigned int cleaned_count = 0;
1388 bool cleaned = false;
1389
1390 pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean);
1391
1392 i = tx_ring->next_to_clean;
1393 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1394 pr_debug("gbec_status:0x%04x dma_status:0x%04x\n",
1395 tx_desc->gbec_status, tx_desc->dma_status);
1396
1397 while ((tx_desc->gbec_status & DSC_INIT16) == 0x0000) {
1398 pr_debug("gbec_status:0x%04x\n", tx_desc->gbec_status);
1399 cleaned = true;
1400 buffer_info = &tx_ring->buffer_info[i];
1401 skb = buffer_info->skb;
1402
1403 if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_ABT)) {
1404 adapter->stats.tx_aborted_errors++;
1405 pr_err("Transfer Abort Error\n");
1406 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CRSER)
1407 ) {
1408 adapter->stats.tx_carrier_errors++;
1409 pr_err("Transfer Carrier Sense Error\n");
1410 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_EXCOL)
1411 ) {
1412 adapter->stats.tx_aborted_errors++;
1413 pr_err("Transfer Collision Abort Error\n");
1414 } else if ((tx_desc->gbec_status &
1415 (PCH_GBE_TXD_GMAC_STAT_SNGCOL |
1416 PCH_GBE_TXD_GMAC_STAT_MLTCOL))) {
1417 adapter->stats.collisions++;
1418 adapter->stats.tx_packets++;
1419 adapter->stats.tx_bytes += skb->len;
1420 pr_debug("Transfer Collision\n");
1421 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CMPLT)
1422 ) {
1423 adapter->stats.tx_packets++;
1424 adapter->stats.tx_bytes += skb->len;
1425 }
1426 if (buffer_info->mapped) {
1427 pr_debug("unmap buffer_info->dma : %d\n", i);
1428 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1429 buffer_info->length, DMA_TO_DEVICE);
1430 buffer_info->mapped = false;
1431 }
1432 if (buffer_info->skb) {
1433 pr_debug("trim buffer_info->skb : %d\n", i);
1434 skb_trim(buffer_info->skb, 0);
1435 }
1436 tx_desc->gbec_status = DSC_INIT16;
1437 if (unlikely(++i == tx_ring->count))
1438 i = 0;
1439 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1440
1441 /* weight of a sort for tx, to avoid endless transmit cleanup */
1442 if (cleaned_count++ == PCH_GBE_TX_WEIGHT)
1443 break;
1444 }
1445 pr_debug("called pch_gbe_unmap_and_free_tx_resource() %d count\n",
1446 cleaned_count);
1447 /* Recover from running out of Tx resources in xmit_frame */
1448 if (unlikely(cleaned && (netif_queue_stopped(adapter->netdev)))) {
1449 netif_wake_queue(adapter->netdev);
1450 adapter->stats.tx_restart_count++;
1451 pr_debug("Tx wake queue\n");
1452 }
1453 spin_lock(&adapter->tx_queue_lock);
1454 tx_ring->next_to_clean = i;
1455 spin_unlock(&adapter->tx_queue_lock);
1456 pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean);
1457 return cleaned;
1458 }
1459
1460 /**
1461 * pch_gbe_clean_rx - Send received data up the network stack; legacy
1462 * @adapter: Board private structure
1463 * @rx_ring: Rx descriptor ring
1464 * @work_done: Completed count
1465 * @work_to_do: Request count
1466 * Returns
1467 * true: Cleaned the descriptor
1468 * false: Not cleaned the descriptor
1469 */
1470 static bool
1471 pch_gbe_clean_rx(struct pch_gbe_adapter *adapter,
1472 struct pch_gbe_rx_ring *rx_ring,
1473 int *work_done, int work_to_do)
1474 {
1475 struct net_device *netdev = adapter->netdev;
1476 struct pci_dev *pdev = adapter->pdev;
1477 struct pch_gbe_buffer *buffer_info;
1478 struct pch_gbe_rx_desc *rx_desc;
1479 u32 length;
1480 unsigned int i;
1481 unsigned int cleaned_count = 0;
1482 bool cleaned = false;
1483 struct sk_buff *skb;
1484 u8 dma_status;
1485 u16 gbec_status;
1486 u32 tcp_ip_status;
1487
1488 i = rx_ring->next_to_clean;
1489
1490 while (*work_done < work_to_do) {
1491 /* Check Rx descriptor status */
1492 rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
1493 if (rx_desc->gbec_status == DSC_INIT16)
1494 break;
1495 cleaned = true;
1496 cleaned_count++;
1497
1498 dma_status = rx_desc->dma_status;
1499 gbec_status = rx_desc->gbec_status;
1500 tcp_ip_status = rx_desc->tcp_ip_status;
1501 rx_desc->gbec_status = DSC_INIT16;
1502 buffer_info = &rx_ring->buffer_info[i];
1503 skb = buffer_info->skb;
1504 buffer_info->skb = NULL;
1505
1506 /* unmap dma */
1507 dma_unmap_single(&pdev->dev, buffer_info->dma,
1508 buffer_info->length, DMA_FROM_DEVICE);
1509 buffer_info->mapped = false;
1510
1511 pr_debug("RxDecNo = 0x%04x Status[DMA:0x%02x GBE:0x%04x "
1512 "TCP:0x%08x] BufInf = 0x%p\n",
1513 i, dma_status, gbec_status, tcp_ip_status,
1514 buffer_info);
1515 /* Error check */
1516 if (unlikely(gbec_status & PCH_GBE_RXD_GMAC_STAT_NOTOCTAL)) {
1517 adapter->stats.rx_frame_errors++;
1518 pr_err("Receive Not Octal Error\n");
1519 } else if (unlikely(gbec_status &
1520 PCH_GBE_RXD_GMAC_STAT_NBLERR)) {
1521 adapter->stats.rx_frame_errors++;
1522 pr_err("Receive Nibble Error\n");
1523 } else if (unlikely(gbec_status &
1524 PCH_GBE_RXD_GMAC_STAT_CRCERR)) {
1525 adapter->stats.rx_crc_errors++;
1526 pr_err("Receive CRC Error\n");
1527 } else {
1528 /* get receive length */
1529 /* length convert[-3], length includes FCS length */
1530 length = (rx_desc->rx_words_eob) - 3 - ETH_FCS_LEN;
1531 if (rx_desc->rx_words_eob & 0x02)
1532 length = length - 4;
1533 /*
1534 * buffer_info->rx_buffer: [Header:14][payload]
1535 * skb->data: [Reserve:2][Header:14][payload]
1536 */
1537 memcpy(skb->data, buffer_info->rx_buffer, length);
1538
1539 /* update status of driver */
1540 adapter->stats.rx_bytes += length;
1541 adapter->stats.rx_packets++;
1542 if ((gbec_status & PCH_GBE_RXD_GMAC_STAT_MARMLT))
1543 adapter->stats.multicast++;
1544 /* Write meta date of skb */
1545 skb_put(skb, length);
1546 skb->protocol = eth_type_trans(skb, netdev);
1547 if (tcp_ip_status & PCH_GBE_RXD_ACC_STAT_TCPIPOK)
1548 skb->ip_summed = CHECKSUM_NONE;
1549 else
1550 skb->ip_summed = CHECKSUM_UNNECESSARY;
1551
1552 napi_gro_receive(&adapter->napi, skb);
1553 (*work_done)++;
1554 pr_debug("Receive skb->ip_summed: %d length: %d\n",
1555 skb->ip_summed, length);
1556 }
1557 /* return some buffers to hardware, one at a time is too slow */
1558 if (unlikely(cleaned_count >= PCH_GBE_RX_BUFFER_WRITE)) {
1559 pch_gbe_alloc_rx_buffers(adapter, rx_ring,
1560 cleaned_count);
1561 cleaned_count = 0;
1562 }
1563 if (++i == rx_ring->count)
1564 i = 0;
1565 }
1566 rx_ring->next_to_clean = i;
1567 if (cleaned_count)
1568 pch_gbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
1569 return cleaned;
1570 }
1571
1572 /**
1573 * pch_gbe_setup_tx_resources - Allocate Tx resources (Descriptors)
1574 * @adapter: Board private structure
1575 * @tx_ring: Tx descriptor ring (for a specific queue) to setup
1576 * Returns
1577 * 0: Successfully
1578 * Negative value: Failed
1579 */
1580 int pch_gbe_setup_tx_resources(struct pch_gbe_adapter *adapter,
1581 struct pch_gbe_tx_ring *tx_ring)
1582 {
1583 struct pci_dev *pdev = adapter->pdev;
1584 struct pch_gbe_tx_desc *tx_desc;
1585 int size;
1586 int desNo;
1587
1588 size = (int)sizeof(struct pch_gbe_buffer) * tx_ring->count;
1589 tx_ring->buffer_info = vzalloc(size);
1590 if (!tx_ring->buffer_info) {
1591 pr_err("Unable to allocate memory for the buffer information\n");
1592 return -ENOMEM;
1593 }
1594
1595 tx_ring->size = tx_ring->count * (int)sizeof(struct pch_gbe_tx_desc);
1596
1597 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
1598 &tx_ring->dma, GFP_KERNEL);
1599 if (!tx_ring->desc) {
1600 vfree(tx_ring->buffer_info);
1601 pr_err("Unable to allocate memory for the transmit descriptor ring\n");
1602 return -ENOMEM;
1603 }
1604 memset(tx_ring->desc, 0, tx_ring->size);
1605
1606 tx_ring->next_to_use = 0;
1607 tx_ring->next_to_clean = 0;
1608 spin_lock_init(&tx_ring->tx_lock);
1609
1610 for (desNo = 0; desNo < tx_ring->count; desNo++) {
1611 tx_desc = PCH_GBE_TX_DESC(*tx_ring, desNo);
1612 tx_desc->gbec_status = DSC_INIT16;
1613 }
1614 pr_debug("tx_ring->desc = 0x%p tx_ring->dma = 0x%08llx\n"
1615 "next_to_clean = 0x%08x next_to_use = 0x%08x\n",
1616 tx_ring->desc, (unsigned long long)tx_ring->dma,
1617 tx_ring->next_to_clean, tx_ring->next_to_use);
1618 return 0;
1619 }
1620
1621 /**
1622 * pch_gbe_setup_rx_resources - Allocate Rx resources (Descriptors)
1623 * @adapter: Board private structure
1624 * @rx_ring: Rx descriptor ring (for a specific queue) to setup
1625 * Returns
1626 * 0: Successfully
1627 * Negative value: Failed
1628 */
1629 int pch_gbe_setup_rx_resources(struct pch_gbe_adapter *adapter,
1630 struct pch_gbe_rx_ring *rx_ring)
1631 {
1632 struct pci_dev *pdev = adapter->pdev;
1633 struct pch_gbe_rx_desc *rx_desc;
1634 int size;
1635 int desNo;
1636
1637 size = (int)sizeof(struct pch_gbe_buffer) * rx_ring->count;
1638 rx_ring->buffer_info = vzalloc(size);
1639 if (!rx_ring->buffer_info) {
1640 pr_err("Unable to allocate memory for the receive descriptor ring\n");
1641 return -ENOMEM;
1642 }
1643 rx_ring->size = rx_ring->count * (int)sizeof(struct pch_gbe_rx_desc);
1644 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
1645 &rx_ring->dma, GFP_KERNEL);
1646
1647 if (!rx_ring->desc) {
1648 pr_err("Unable to allocate memory for the receive descriptor ring\n");
1649 vfree(rx_ring->buffer_info);
1650 return -ENOMEM;
1651 }
1652 memset(rx_ring->desc, 0, rx_ring->size);
1653 rx_ring->next_to_clean = 0;
1654 rx_ring->next_to_use = 0;
1655 for (desNo = 0; desNo < rx_ring->count; desNo++) {
1656 rx_desc = PCH_GBE_RX_DESC(*rx_ring, desNo);
1657 rx_desc->gbec_status = DSC_INIT16;
1658 }
1659 pr_debug("rx_ring->desc = 0x%p rx_ring->dma = 0x%08llx "
1660 "next_to_clean = 0x%08x next_to_use = 0x%08x\n",
1661 rx_ring->desc, (unsigned long long)rx_ring->dma,
1662 rx_ring->next_to_clean, rx_ring->next_to_use);
1663 return 0;
1664 }
1665
1666 /**
1667 * pch_gbe_free_tx_resources - Free Tx Resources
1668 * @adapter: Board private structure
1669 * @tx_ring: Tx descriptor ring for a specific queue
1670 */
1671 void pch_gbe_free_tx_resources(struct pch_gbe_adapter *adapter,
1672 struct pch_gbe_tx_ring *tx_ring)
1673 {
1674 struct pci_dev *pdev = adapter->pdev;
1675
1676 pch_gbe_clean_tx_ring(adapter, tx_ring);
1677 vfree(tx_ring->buffer_info);
1678 tx_ring->buffer_info = NULL;
1679 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1680 tx_ring->desc = NULL;
1681 }
1682
1683 /**
1684 * pch_gbe_free_rx_resources - Free Rx Resources
1685 * @adapter: Board private structure
1686 * @rx_ring: Ring to clean the resources from
1687 */
1688 void pch_gbe_free_rx_resources(struct pch_gbe_adapter *adapter,
1689 struct pch_gbe_rx_ring *rx_ring)
1690 {
1691 struct pci_dev *pdev = adapter->pdev;
1692
1693 pch_gbe_clean_rx_ring(adapter, rx_ring);
1694 vfree(rx_ring->buffer_info);
1695 rx_ring->buffer_info = NULL;
1696 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1697 rx_ring->desc = NULL;
1698 }
1699
1700 /**
1701 * pch_gbe_request_irq - Allocate an interrupt line
1702 * @adapter: Board private structure
1703 * Returns
1704 * 0: Successfully
1705 * Negative value: Failed
1706 */
1707 static int pch_gbe_request_irq(struct pch_gbe_adapter *adapter)
1708 {
1709 struct net_device *netdev = adapter->netdev;
1710 int err;
1711 int flags;
1712
1713 flags = IRQF_SHARED;
1714 adapter->have_msi = false;
1715 err = pci_enable_msi(adapter->pdev);
1716 pr_debug("call pci_enable_msi\n");
1717 if (err) {
1718 pr_debug("call pci_enable_msi - Error: %d\n", err);
1719 } else {
1720 flags = 0;
1721 adapter->have_msi = true;
1722 }
1723 err = request_irq(adapter->pdev->irq, &pch_gbe_intr,
1724 flags, netdev->name, netdev);
1725 if (err)
1726 pr_err("Unable to allocate interrupt Error: %d\n", err);
1727 pr_debug("adapter->have_msi : %d flags : 0x%04x return : 0x%04x\n",
1728 adapter->have_msi, flags, err);
1729 return err;
1730 }
1731
1732
1733 static void pch_gbe_set_multi(struct net_device *netdev);
1734 /**
1735 * pch_gbe_up - Up GbE network device
1736 * @adapter: Board private structure
1737 * Returns
1738 * 0: Successfully
1739 * Negative value: Failed
1740 */
1741 int pch_gbe_up(struct pch_gbe_adapter *adapter)
1742 {
1743 struct net_device *netdev = adapter->netdev;
1744 struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
1745 struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
1746 int err;
1747
1748 /* hardware has been reset, we need to reload some things */
1749 pch_gbe_set_multi(netdev);
1750
1751 pch_gbe_setup_tctl(adapter);
1752 pch_gbe_configure_tx(adapter);
1753 pch_gbe_setup_rctl(adapter);
1754 pch_gbe_configure_rx(adapter);
1755
1756 err = pch_gbe_request_irq(adapter);
1757 if (err) {
1758 pr_err("Error: can't bring device up\n");
1759 return err;
1760 }
1761 err = pch_gbe_alloc_rx_buffers_pool(adapter, rx_ring, rx_ring->count);
1762 if (err) {
1763 pr_err("Error: can't bring device up\n");
1764 return err;
1765 }
1766 pch_gbe_alloc_tx_buffers(adapter, tx_ring);
1767 pch_gbe_alloc_rx_buffers(adapter, rx_ring, rx_ring->count);
1768 adapter->tx_queue_len = netdev->tx_queue_len;
1769 pch_gbe_start_receive(&adapter->hw);
1770
1771 mod_timer(&adapter->watchdog_timer, jiffies);
1772
1773 napi_enable(&adapter->napi);
1774 pch_gbe_irq_enable(adapter);
1775 netif_start_queue(adapter->netdev);
1776
1777 return 0;
1778 }
1779
1780 /**
1781 * pch_gbe_down - Down GbE network device
1782 * @adapter: Board private structure
1783 */
1784 void pch_gbe_down(struct pch_gbe_adapter *adapter)
1785 {
1786 struct net_device *netdev = adapter->netdev;
1787 struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
1788
1789 /* signal that we're down so the interrupt handler does not
1790 * reschedule our watchdog timer */
1791 napi_disable(&adapter->napi);
1792 atomic_set(&adapter->irq_sem, 0);
1793
1794 pch_gbe_irq_disable(adapter);
1795 pch_gbe_free_irq(adapter);
1796
1797 del_timer_sync(&adapter->watchdog_timer);
1798
1799 netdev->tx_queue_len = adapter->tx_queue_len;
1800 netif_carrier_off(netdev);
1801 netif_stop_queue(netdev);
1802
1803 pch_gbe_reset(adapter);
1804 pch_gbe_clean_tx_ring(adapter, adapter->tx_ring);
1805 pch_gbe_clean_rx_ring(adapter, adapter->rx_ring);
1806
1807 pci_free_consistent(adapter->pdev, rx_ring->rx_buff_pool_size,
1808 rx_ring->rx_buff_pool, rx_ring->rx_buff_pool_logic);
1809 rx_ring->rx_buff_pool_logic = 0;
1810 rx_ring->rx_buff_pool_size = 0;
1811 rx_ring->rx_buff_pool = NULL;
1812 }
1813
1814 /**
1815 * pch_gbe_sw_init - Initialize general software structures (struct pch_gbe_adapter)
1816 * @adapter: Board private structure to initialize
1817 * Returns
1818 * 0: Successfully
1819 * Negative value: Failed
1820 */
1821 static int pch_gbe_sw_init(struct pch_gbe_adapter *adapter)
1822 {
1823 struct pch_gbe_hw *hw = &adapter->hw;
1824 struct net_device *netdev = adapter->netdev;
1825
1826 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
1827 hw->mac.max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1828 hw->mac.min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1829
1830 /* Initialize the hardware-specific values */
1831 if (pch_gbe_hal_setup_init_funcs(hw)) {
1832 pr_err("Hardware Initialization Failure\n");
1833 return -EIO;
1834 }
1835 if (pch_gbe_alloc_queues(adapter)) {
1836 pr_err("Unable to allocate memory for queues\n");
1837 return -ENOMEM;
1838 }
1839 spin_lock_init(&adapter->hw.miim_lock);
1840 spin_lock_init(&adapter->tx_queue_lock);
1841 spin_lock_init(&adapter->stats_lock);
1842 spin_lock_init(&adapter->ethtool_lock);
1843 atomic_set(&adapter->irq_sem, 0);
1844 pch_gbe_irq_disable(adapter);
1845
1846 pch_gbe_init_stats(adapter);
1847
1848 pr_debug("rx_buffer_len : %d mac.min_frame_size : %d mac.max_frame_size : %d\n",
1849 (u32) adapter->rx_buffer_len,
1850 hw->mac.min_frame_size, hw->mac.max_frame_size);
1851 return 0;
1852 }
1853
1854 /**
1855 * pch_gbe_open - Called when a network interface is made active
1856 * @netdev: Network interface device structure
1857 * Returns
1858 * 0: Successfully
1859 * Negative value: Failed
1860 */
1861 static int pch_gbe_open(struct net_device *netdev)
1862 {
1863 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1864 struct pch_gbe_hw *hw = &adapter->hw;
1865 int err;
1866
1867 /* allocate transmit descriptors */
1868 err = pch_gbe_setup_tx_resources(adapter, adapter->tx_ring);
1869 if (err)
1870 goto err_setup_tx;
1871 /* allocate receive descriptors */
1872 err = pch_gbe_setup_rx_resources(adapter, adapter->rx_ring);
1873 if (err)
1874 goto err_setup_rx;
1875 pch_gbe_hal_power_up_phy(hw);
1876 err = pch_gbe_up(adapter);
1877 if (err)
1878 goto err_up;
1879 pr_debug("Success End\n");
1880 return 0;
1881
1882 err_up:
1883 if (!adapter->wake_up_evt)
1884 pch_gbe_hal_power_down_phy(hw);
1885 pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
1886 err_setup_rx:
1887 pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
1888 err_setup_tx:
1889 pch_gbe_reset(adapter);
1890 pr_err("Error End\n");
1891 return err;
1892 }
1893
1894 /**
1895 * pch_gbe_stop - Disables a network interface
1896 * @netdev: Network interface device structure
1897 * Returns
1898 * 0: Successfully
1899 */
1900 static int pch_gbe_stop(struct net_device *netdev)
1901 {
1902 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1903 struct pch_gbe_hw *hw = &adapter->hw;
1904
1905 pch_gbe_down(adapter);
1906 if (!adapter->wake_up_evt)
1907 pch_gbe_hal_power_down_phy(hw);
1908 pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
1909 pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
1910 return 0;
1911 }
1912
1913 /**
1914 * pch_gbe_xmit_frame - Packet transmitting start
1915 * @skb: Socket buffer structure
1916 * @netdev: Network interface device structure
1917 * Returns
1918 * - NETDEV_TX_OK: Normal end
1919 * - NETDEV_TX_BUSY: Error end
1920 */
1921 static int pch_gbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1922 {
1923 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1924 struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
1925 unsigned long flags;
1926
1927 if (unlikely(skb->len > (adapter->hw.mac.max_frame_size - 4))) {
1928 pr_err("Transfer length Error: skb len: %d > max: %d\n",
1929 skb->len, adapter->hw.mac.max_frame_size);
1930 dev_kfree_skb_any(skb);
1931 adapter->stats.tx_length_errors++;
1932 return NETDEV_TX_OK;
1933 }
1934 if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags)) {
1935 /* Collision - tell upper layer to requeue */
1936 return NETDEV_TX_LOCKED;
1937 }
1938 if (unlikely(!PCH_GBE_DESC_UNUSED(tx_ring))) {
1939 netif_stop_queue(netdev);
1940 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1941 pr_debug("Return : BUSY next_to use : 0x%08x next_to clean : 0x%08x\n",
1942 tx_ring->next_to_use, tx_ring->next_to_clean);
1943 return NETDEV_TX_BUSY;
1944 }
1945 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1946
1947 /* CRC,ITAG no support */
1948 pch_gbe_tx_queue(adapter, tx_ring, skb);
1949 return NETDEV_TX_OK;
1950 }
1951
1952 /**
1953 * pch_gbe_get_stats - Get System Network Statistics
1954 * @netdev: Network interface device structure
1955 * Returns: The current stats
1956 */
1957 static struct net_device_stats *pch_gbe_get_stats(struct net_device *netdev)
1958 {
1959 /* only return the current stats */
1960 return &netdev->stats;
1961 }
1962
1963 /**
1964 * pch_gbe_set_multi - Multicast and Promiscuous mode set
1965 * @netdev: Network interface device structure
1966 */
1967 static void pch_gbe_set_multi(struct net_device *netdev)
1968 {
1969 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1970 struct pch_gbe_hw *hw = &adapter->hw;
1971 struct netdev_hw_addr *ha;
1972 u8 *mta_list;
1973 u32 rctl;
1974 int i;
1975 int mc_count;
1976
1977 pr_debug("netdev->flags : 0x%08x\n", netdev->flags);
1978
1979 /* Check for Promiscuous and All Multicast modes */
1980 rctl = ioread32(&hw->reg->RX_MODE);
1981 mc_count = netdev_mc_count(netdev);
1982 if ((netdev->flags & IFF_PROMISC)) {
1983 rctl &= ~PCH_GBE_ADD_FIL_EN;
1984 rctl &= ~PCH_GBE_MLT_FIL_EN;
1985 } else if ((netdev->flags & IFF_ALLMULTI)) {
1986 /* all the multicasting receive permissions */
1987 rctl |= PCH_GBE_ADD_FIL_EN;
1988 rctl &= ~PCH_GBE_MLT_FIL_EN;
1989 } else {
1990 if (mc_count >= PCH_GBE_MAR_ENTRIES) {
1991 /* all the multicasting receive permissions */
1992 rctl |= PCH_GBE_ADD_FIL_EN;
1993 rctl &= ~PCH_GBE_MLT_FIL_EN;
1994 } else {
1995 rctl |= (PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN);
1996 }
1997 }
1998 iowrite32(rctl, &hw->reg->RX_MODE);
1999
2000 if (mc_count >= PCH_GBE_MAR_ENTRIES)
2001 return;
2002 mta_list = kmalloc(mc_count * ETH_ALEN, GFP_ATOMIC);
2003 if (!mta_list)
2004 return;
2005
2006 /* The shared function expects a packed array of only addresses. */
2007 i = 0;
2008 netdev_for_each_mc_addr(ha, netdev) {
2009 if (i == mc_count)
2010 break;
2011 memcpy(mta_list + (i++ * ETH_ALEN), &ha->addr, ETH_ALEN);
2012 }
2013 pch_gbe_mac_mc_addr_list_update(hw, mta_list, i, 1,
2014 PCH_GBE_MAR_ENTRIES);
2015 kfree(mta_list);
2016
2017 pr_debug("RX_MODE reg(check bit31,30 ADD,MLT) : 0x%08x netdev->mc_count : 0x%08x\n",
2018 ioread32(&hw->reg->RX_MODE), mc_count);
2019 }
2020
2021 /**
2022 * pch_gbe_set_mac - Change the Ethernet Address of the NIC
2023 * @netdev: Network interface device structure
2024 * @addr: Pointer to an address structure
2025 * Returns
2026 * 0: Successfully
2027 * -EADDRNOTAVAIL: Failed
2028 */
2029 static int pch_gbe_set_mac(struct net_device *netdev, void *addr)
2030 {
2031 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2032 struct sockaddr *skaddr = addr;
2033 int ret_val;
2034
2035 if (!is_valid_ether_addr(skaddr->sa_data)) {
2036 ret_val = -EADDRNOTAVAIL;
2037 } else {
2038 memcpy(netdev->dev_addr, skaddr->sa_data, netdev->addr_len);
2039 memcpy(adapter->hw.mac.addr, skaddr->sa_data, netdev->addr_len);
2040 pch_gbe_mac_mar_set(&adapter->hw, adapter->hw.mac.addr, 0);
2041 ret_val = 0;
2042 }
2043 pr_debug("ret_val : 0x%08x\n", ret_val);
2044 pr_debug("dev_addr : %pM\n", netdev->dev_addr);
2045 pr_debug("mac_addr : %pM\n", adapter->hw.mac.addr);
2046 pr_debug("MAC_ADR1AB reg : 0x%08x 0x%08x\n",
2047 ioread32(&adapter->hw.reg->mac_adr[0].high),
2048 ioread32(&adapter->hw.reg->mac_adr[0].low));
2049 return ret_val;
2050 }
2051
2052 /**
2053 * pch_gbe_change_mtu - Change the Maximum Transfer Unit
2054 * @netdev: Network interface device structure
2055 * @new_mtu: New value for maximum frame size
2056 * Returns
2057 * 0: Successfully
2058 * -EINVAL: Failed
2059 */
2060 static int pch_gbe_change_mtu(struct net_device *netdev, int new_mtu)
2061 {
2062 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2063 int max_frame;
2064 unsigned long old_rx_buffer_len = adapter->rx_buffer_len;
2065 int err;
2066
2067 max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2068 if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
2069 (max_frame > PCH_GBE_MAX_JUMBO_FRAME_SIZE)) {
2070 pr_err("Invalid MTU setting\n");
2071 return -EINVAL;
2072 }
2073 if (max_frame <= PCH_GBE_FRAME_SIZE_2048)
2074 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
2075 else if (max_frame <= PCH_GBE_FRAME_SIZE_4096)
2076 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_4096;
2077 else if (max_frame <= PCH_GBE_FRAME_SIZE_8192)
2078 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_8192;
2079 else
2080 adapter->rx_buffer_len = PCH_GBE_MAX_RX_BUFFER_SIZE;
2081
2082 if (netif_running(netdev)) {
2083 pch_gbe_down(adapter);
2084 err = pch_gbe_up(adapter);
2085 if (err) {
2086 adapter->rx_buffer_len = old_rx_buffer_len;
2087 pch_gbe_up(adapter);
2088 return -ENOMEM;
2089 } else {
2090 netdev->mtu = new_mtu;
2091 adapter->hw.mac.max_frame_size = max_frame;
2092 }
2093 } else {
2094 pch_gbe_reset(adapter);
2095 netdev->mtu = new_mtu;
2096 adapter->hw.mac.max_frame_size = max_frame;
2097 }
2098
2099 pr_debug("max_frame : %d rx_buffer_len : %d mtu : %d max_frame_size : %d\n",
2100 max_frame, (u32) adapter->rx_buffer_len, netdev->mtu,
2101 adapter->hw.mac.max_frame_size);
2102 return 0;
2103 }
2104
2105 /**
2106 * pch_gbe_set_features - Reset device after features changed
2107 * @netdev: Network interface device structure
2108 * @features: New features
2109 * Returns
2110 * 0: HW state updated successfully
2111 */
2112 static int pch_gbe_set_features(struct net_device *netdev, u32 features)
2113 {
2114 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2115 u32 changed = features ^ netdev->features;
2116
2117 if (!(changed & NETIF_F_RXCSUM))
2118 return 0;
2119
2120 if (netif_running(netdev))
2121 pch_gbe_reinit_locked(adapter);
2122 else
2123 pch_gbe_reset(adapter);
2124
2125 return 0;
2126 }
2127
2128 /**
2129 * pch_gbe_ioctl - Controls register through a MII interface
2130 * @netdev: Network interface device structure
2131 * @ifr: Pointer to ifr structure
2132 * @cmd: Control command
2133 * Returns
2134 * 0: Successfully
2135 * Negative value: Failed
2136 */
2137 static int pch_gbe_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2138 {
2139 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2140
2141 pr_debug("cmd : 0x%04x\n", cmd);
2142
2143 return generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
2144 }
2145
2146 /**
2147 * pch_gbe_tx_timeout - Respond to a Tx Hang
2148 * @netdev: Network interface device structure
2149 */
2150 static void pch_gbe_tx_timeout(struct net_device *netdev)
2151 {
2152 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2153
2154 /* Do the reset outside of interrupt context */
2155 adapter->stats.tx_timeout_count++;
2156 schedule_work(&adapter->reset_task);
2157 }
2158
2159 /**
2160 * pch_gbe_napi_poll - NAPI receive and transfer polling callback
2161 * @napi: Pointer of polling device struct
2162 * @budget: The maximum number of a packet
2163 * Returns
2164 * false: Exit the polling mode
2165 * true: Continue the polling mode
2166 */
2167 static int pch_gbe_napi_poll(struct napi_struct *napi, int budget)
2168 {
2169 struct pch_gbe_adapter *adapter =
2170 container_of(napi, struct pch_gbe_adapter, napi);
2171 struct net_device *netdev = adapter->netdev;
2172 int work_done = 0;
2173 bool poll_end_flag = false;
2174 bool cleaned = false;
2175 u32 int_en;
2176
2177 pr_debug("budget : %d\n", budget);
2178
2179 /* Keep link state information with original netdev */
2180 if (!netif_carrier_ok(netdev)) {
2181 poll_end_flag = true;
2182 } else {
2183 pch_gbe_clean_rx(adapter, adapter->rx_ring, &work_done, budget);
2184 if (adapter->rx_stop_flag) {
2185 adapter->rx_stop_flag = false;
2186 pch_gbe_start_receive(&adapter->hw);
2187 int_en = ioread32(&adapter->hw.reg->INT_EN);
2188 iowrite32((int_en | PCH_GBE_INT_RX_FIFO_ERR),
2189 &adapter->hw.reg->INT_EN);
2190 }
2191 cleaned = pch_gbe_clean_tx(adapter, adapter->tx_ring);
2192
2193 if (cleaned)
2194 work_done = budget;
2195 /* If no Tx and not enough Rx work done,
2196 * exit the polling mode
2197 */
2198 if ((work_done < budget) || !netif_running(netdev))
2199 poll_end_flag = true;
2200 }
2201
2202 if (poll_end_flag) {
2203 napi_complete(napi);
2204 pch_gbe_irq_enable(adapter);
2205 }
2206
2207 pr_debug("poll_end_flag : %d work_done : %d budget : %d\n",
2208 poll_end_flag, work_done, budget);
2209
2210 return work_done;
2211 }
2212
2213 #ifdef CONFIG_NET_POLL_CONTROLLER
2214 /**
2215 * pch_gbe_netpoll - Used by things like netconsole to send skbs
2216 * @netdev: Network interface device structure
2217 */
2218 static void pch_gbe_netpoll(struct net_device *netdev)
2219 {
2220 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2221
2222 disable_irq(adapter->pdev->irq);
2223 pch_gbe_intr(adapter->pdev->irq, netdev);
2224 enable_irq(adapter->pdev->irq);
2225 }
2226 #endif
2227
2228 static const struct net_device_ops pch_gbe_netdev_ops = {
2229 .ndo_open = pch_gbe_open,
2230 .ndo_stop = pch_gbe_stop,
2231 .ndo_start_xmit = pch_gbe_xmit_frame,
2232 .ndo_get_stats = pch_gbe_get_stats,
2233 .ndo_set_mac_address = pch_gbe_set_mac,
2234 .ndo_tx_timeout = pch_gbe_tx_timeout,
2235 .ndo_change_mtu = pch_gbe_change_mtu,
2236 .ndo_set_features = pch_gbe_set_features,
2237 .ndo_do_ioctl = pch_gbe_ioctl,
2238 .ndo_set_multicast_list = &pch_gbe_set_multi,
2239 #ifdef CONFIG_NET_POLL_CONTROLLER
2240 .ndo_poll_controller = pch_gbe_netpoll,
2241 #endif
2242 };
2243
2244 static pci_ers_result_t pch_gbe_io_error_detected(struct pci_dev *pdev,
2245 pci_channel_state_t state)
2246 {
2247 struct net_device *netdev = pci_get_drvdata(pdev);
2248 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2249
2250 netif_device_detach(netdev);
2251 if (netif_running(netdev))
2252 pch_gbe_down(adapter);
2253 pci_disable_device(pdev);
2254 /* Request a slot slot reset. */
2255 return PCI_ERS_RESULT_NEED_RESET;
2256 }
2257
2258 static pci_ers_result_t pch_gbe_io_slot_reset(struct pci_dev *pdev)
2259 {
2260 struct net_device *netdev = pci_get_drvdata(pdev);
2261 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2262 struct pch_gbe_hw *hw = &adapter->hw;
2263
2264 if (pci_enable_device(pdev)) {
2265 pr_err("Cannot re-enable PCI device after reset\n");
2266 return PCI_ERS_RESULT_DISCONNECT;
2267 }
2268 pci_set_master(pdev);
2269 pci_enable_wake(pdev, PCI_D0, 0);
2270 pch_gbe_hal_power_up_phy(hw);
2271 pch_gbe_reset(adapter);
2272 /* Clear wake up status */
2273 pch_gbe_mac_set_wol_event(hw, 0);
2274
2275 return PCI_ERS_RESULT_RECOVERED;
2276 }
2277
2278 static void pch_gbe_io_resume(struct pci_dev *pdev)
2279 {
2280 struct net_device *netdev = pci_get_drvdata(pdev);
2281 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2282
2283 if (netif_running(netdev)) {
2284 if (pch_gbe_up(adapter)) {
2285 pr_debug("can't bring device back up after reset\n");
2286 return;
2287 }
2288 }
2289 netif_device_attach(netdev);
2290 }
2291
2292 static int __pch_gbe_suspend(struct pci_dev *pdev)
2293 {
2294 struct net_device *netdev = pci_get_drvdata(pdev);
2295 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2296 struct pch_gbe_hw *hw = &adapter->hw;
2297 u32 wufc = adapter->wake_up_evt;
2298 int retval = 0;
2299
2300 netif_device_detach(netdev);
2301 if (netif_running(netdev))
2302 pch_gbe_down(adapter);
2303 if (wufc) {
2304 pch_gbe_set_multi(netdev);
2305 pch_gbe_setup_rctl(adapter);
2306 pch_gbe_configure_rx(adapter);
2307 pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
2308 hw->mac.link_duplex);
2309 pch_gbe_set_mode(adapter, hw->mac.link_speed,
2310 hw->mac.link_duplex);
2311 pch_gbe_mac_set_wol_event(hw, wufc);
2312 pci_disable_device(pdev);
2313 } else {
2314 pch_gbe_hal_power_down_phy(hw);
2315 pch_gbe_mac_set_wol_event(hw, wufc);
2316 pci_disable_device(pdev);
2317 }
2318 return retval;
2319 }
2320
2321 #ifdef CONFIG_PM
2322 static int pch_gbe_suspend(struct device *device)
2323 {
2324 struct pci_dev *pdev = to_pci_dev(device);
2325
2326 return __pch_gbe_suspend(pdev);
2327 }
2328
2329 static int pch_gbe_resume(struct device *device)
2330 {
2331 struct pci_dev *pdev = to_pci_dev(device);
2332 struct net_device *netdev = pci_get_drvdata(pdev);
2333 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2334 struct pch_gbe_hw *hw = &adapter->hw;
2335 u32 err;
2336
2337 err = pci_enable_device(pdev);
2338 if (err) {
2339 pr_err("Cannot enable PCI device from suspend\n");
2340 return err;
2341 }
2342 pci_set_master(pdev);
2343 pch_gbe_hal_power_up_phy(hw);
2344 pch_gbe_reset(adapter);
2345 /* Clear wake on lan control and status */
2346 pch_gbe_mac_set_wol_event(hw, 0);
2347
2348 if (netif_running(netdev))
2349 pch_gbe_up(adapter);
2350 netif_device_attach(netdev);
2351
2352 return 0;
2353 }
2354 #endif /* CONFIG_PM */
2355
2356 static void pch_gbe_shutdown(struct pci_dev *pdev)
2357 {
2358 __pch_gbe_suspend(pdev);
2359 if (system_state == SYSTEM_POWER_OFF) {
2360 pci_wake_from_d3(pdev, true);
2361 pci_set_power_state(pdev, PCI_D3hot);
2362 }
2363 }
2364
2365 static void pch_gbe_remove(struct pci_dev *pdev)
2366 {
2367 struct net_device *netdev = pci_get_drvdata(pdev);
2368 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2369
2370 cancel_work_sync(&adapter->reset_task);
2371 unregister_netdev(netdev);
2372
2373 pch_gbe_hal_phy_hw_reset(&adapter->hw);
2374
2375 kfree(adapter->tx_ring);
2376 kfree(adapter->rx_ring);
2377
2378 iounmap(adapter->hw.reg);
2379 pci_release_regions(pdev);
2380 free_netdev(netdev);
2381 pci_disable_device(pdev);
2382 }
2383
2384 static int pch_gbe_probe(struct pci_dev *pdev,
2385 const struct pci_device_id *pci_id)
2386 {
2387 struct net_device *netdev;
2388 struct pch_gbe_adapter *adapter;
2389 int ret;
2390
2391 ret = pci_enable_device(pdev);
2392 if (ret)
2393 return ret;
2394
2395 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
2396 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
2397 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2398 if (ret) {
2399 ret = pci_set_consistent_dma_mask(pdev,
2400 DMA_BIT_MASK(32));
2401 if (ret) {
2402 dev_err(&pdev->dev, "ERR: No usable DMA "
2403 "configuration, aborting\n");
2404 goto err_disable_device;
2405 }
2406 }
2407 }
2408
2409 ret = pci_request_regions(pdev, KBUILD_MODNAME);
2410 if (ret) {
2411 dev_err(&pdev->dev,
2412 "ERR: Can't reserve PCI I/O and memory resources\n");
2413 goto err_disable_device;
2414 }
2415 pci_set_master(pdev);
2416
2417 netdev = alloc_etherdev((int)sizeof(struct pch_gbe_adapter));
2418 if (!netdev) {
2419 ret = -ENOMEM;
2420 dev_err(&pdev->dev,
2421 "ERR: Can't allocate and set up an Ethernet device\n");
2422 goto err_release_pci;
2423 }
2424 SET_NETDEV_DEV(netdev, &pdev->dev);
2425
2426 pci_set_drvdata(pdev, netdev);
2427 adapter = netdev_priv(netdev);
2428 adapter->netdev = netdev;
2429 adapter->pdev = pdev;
2430 adapter->hw.back = adapter;
2431 adapter->hw.reg = pci_iomap(pdev, PCH_GBE_PCI_BAR, 0);
2432 if (!adapter->hw.reg) {
2433 ret = -EIO;
2434 dev_err(&pdev->dev, "Can't ioremap\n");
2435 goto err_free_netdev;
2436 }
2437
2438 netdev->netdev_ops = &pch_gbe_netdev_ops;
2439 netdev->watchdog_timeo = PCH_GBE_WATCHDOG_PERIOD;
2440 netif_napi_add(netdev, &adapter->napi,
2441 pch_gbe_napi_poll, PCH_GBE_RX_WEIGHT);
2442 netdev->hw_features = NETIF_F_RXCSUM |
2443 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2444 netdev->features = netdev->hw_features;
2445 pch_gbe_set_ethtool_ops(netdev);
2446
2447 pch_gbe_mac_load_mac_addr(&adapter->hw);
2448 pch_gbe_mac_reset_hw(&adapter->hw);
2449
2450 /* setup the private structure */
2451 ret = pch_gbe_sw_init(adapter);
2452 if (ret)
2453 goto err_iounmap;
2454
2455 /* Initialize PHY */
2456 ret = pch_gbe_init_phy(adapter);
2457 if (ret) {
2458 dev_err(&pdev->dev, "PHY initialize error\n");
2459 goto err_free_adapter;
2460 }
2461 pch_gbe_hal_get_bus_info(&adapter->hw);
2462
2463 /* Read the MAC address. and store to the private data */
2464 ret = pch_gbe_hal_read_mac_addr(&adapter->hw);
2465 if (ret) {
2466 dev_err(&pdev->dev, "MAC address Read Error\n");
2467 goto err_free_adapter;
2468 }
2469
2470 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2471 if (!is_valid_ether_addr(netdev->dev_addr)) {
2472 dev_err(&pdev->dev, "Invalid MAC Address\n");
2473 ret = -EIO;
2474 goto err_free_adapter;
2475 }
2476 setup_timer(&adapter->watchdog_timer, pch_gbe_watchdog,
2477 (unsigned long)adapter);
2478
2479 INIT_WORK(&adapter->reset_task, pch_gbe_reset_task);
2480
2481 pch_gbe_check_options(adapter);
2482
2483 /* initialize the wol settings based on the eeprom settings */
2484 adapter->wake_up_evt = PCH_GBE_WL_INIT_SETTING;
2485 dev_info(&pdev->dev, "MAC address : %pM\n", netdev->dev_addr);
2486
2487 /* reset the hardware with the new settings */
2488 pch_gbe_reset(adapter);
2489
2490 ret = register_netdev(netdev);
2491 if (ret)
2492 goto err_free_adapter;
2493 /* tell the stack to leave us alone until pch_gbe_open() is called */
2494 netif_carrier_off(netdev);
2495 netif_stop_queue(netdev);
2496
2497 dev_dbg(&pdev->dev, "OKIsemi(R) PCH Network Connection\n");
2498
2499 device_set_wakeup_enable(&pdev->dev, 1);
2500 return 0;
2501
2502 err_free_adapter:
2503 pch_gbe_hal_phy_hw_reset(&adapter->hw);
2504 kfree(adapter->tx_ring);
2505 kfree(adapter->rx_ring);
2506 err_iounmap:
2507 iounmap(adapter->hw.reg);
2508 err_free_netdev:
2509 free_netdev(netdev);
2510 err_release_pci:
2511 pci_release_regions(pdev);
2512 err_disable_device:
2513 pci_disable_device(pdev);
2514 return ret;
2515 }
2516
2517 static DEFINE_PCI_DEVICE_TABLE(pch_gbe_pcidev_id) = {
2518 {.vendor = PCI_VENDOR_ID_INTEL,
2519 .device = PCI_DEVICE_ID_INTEL_IOH1_GBE,
2520 .subvendor = PCI_ANY_ID,
2521 .subdevice = PCI_ANY_ID,
2522 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2523 .class_mask = (0xFFFF00)
2524 },
2525 {.vendor = PCI_VENDOR_ID_ROHM,
2526 .device = PCI_DEVICE_ID_ROHM_ML7223_GBE,
2527 .subvendor = PCI_ANY_ID,
2528 .subdevice = PCI_ANY_ID,
2529 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2530 .class_mask = (0xFFFF00)
2531 },
2532 {.vendor = PCI_VENDOR_ID_ROHM,
2533 .device = PCI_DEVICE_ID_ROHM_ML7831_GBE,
2534 .subvendor = PCI_ANY_ID,
2535 .subdevice = PCI_ANY_ID,
2536 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2537 .class_mask = (0xFFFF00)
2538 },
2539 /* required last entry */
2540 {0}
2541 };
2542
2543 #ifdef CONFIG_PM
2544 static const struct dev_pm_ops pch_gbe_pm_ops = {
2545 .suspend = pch_gbe_suspend,
2546 .resume = pch_gbe_resume,
2547 .freeze = pch_gbe_suspend,
2548 .thaw = pch_gbe_resume,
2549 .poweroff = pch_gbe_suspend,
2550 .restore = pch_gbe_resume,
2551 };
2552 #endif
2553
2554 static struct pci_error_handlers pch_gbe_err_handler = {
2555 .error_detected = pch_gbe_io_error_detected,
2556 .slot_reset = pch_gbe_io_slot_reset,
2557 .resume = pch_gbe_io_resume
2558 };
2559
2560 static struct pci_driver pch_gbe_driver = {
2561 .name = KBUILD_MODNAME,
2562 .id_table = pch_gbe_pcidev_id,
2563 .probe = pch_gbe_probe,
2564 .remove = pch_gbe_remove,
2565 #ifdef CONFIG_PM
2566 .driver.pm = &pch_gbe_pm_ops,
2567 #endif
2568 .shutdown = pch_gbe_shutdown,
2569 .err_handler = &pch_gbe_err_handler
2570 };
2571
2572
2573 static int __init pch_gbe_init_module(void)
2574 {
2575 int ret;
2576
2577 ret = pci_register_driver(&pch_gbe_driver);
2578 if (copybreak != PCH_GBE_COPYBREAK_DEFAULT) {
2579 if (copybreak == 0) {
2580 pr_info("copybreak disabled\n");
2581 } else {
2582 pr_info("copybreak enabled for packets <= %u bytes\n",
2583 copybreak);
2584 }
2585 }
2586 return ret;
2587 }
2588
2589 static void __exit pch_gbe_exit_module(void)
2590 {
2591 pci_unregister_driver(&pch_gbe_driver);
2592 }
2593
2594 module_init(pch_gbe_init_module);
2595 module_exit(pch_gbe_exit_module);
2596
2597 MODULE_DESCRIPTION("EG20T PCH Gigabit ethernet Driver");
2598 MODULE_AUTHOR("OKI SEMICONDUCTOR, <toshiharu-linux@dsn.okisemi.com>");
2599 MODULE_LICENSE("GPL");
2600 MODULE_VERSION(DRV_VERSION);
2601 MODULE_DEVICE_TABLE(pci, pch_gbe_pcidev_id);
2602
2603 module_param(copybreak, uint, 0644);
2604 MODULE_PARM_DESC(copybreak,
2605 "Maximum size of packet that is copied to a new buffer on receive");
2606
2607 /* pch_gbe_main.c */
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