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drivers/net: use vzalloc()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / pch_gbe / pch_gbe_main.c
blobafb75066b14d1cce3505963d74d4f0b26d83f8fe
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_WATCHDOG_PERIOD (1 * HZ) /* watchdog time */
33 #define PCH_GBE_COPYBREAK_DEFAULT 256
34 #define PCH_GBE_PCI_BAR 1
35
36 #define PCH_GBE_TX_WEIGHT 64
37 #define PCH_GBE_RX_WEIGHT 64
38 #define PCH_GBE_RX_BUFFER_WRITE 16
39
40 /* Initialize the wake-on-LAN settings */
41 #define PCH_GBE_WL_INIT_SETTING (PCH_GBE_WLC_MP)
42
43 #define PCH_GBE_MAC_RGMII_CTRL_SETTING ( \
44 PCH_GBE_CHIP_TYPE_INTERNAL | \
45 PCH_GBE_RGMII_MODE_RGMII | \
46 PCH_GBE_CRS_SEL \
47 )
48
49 /* Ethertype field values */
50 #define PCH_GBE_MAX_JUMBO_FRAME_SIZE 10318
51 #define PCH_GBE_FRAME_SIZE_2048 2048
52 #define PCH_GBE_FRAME_SIZE_4096 4096
53 #define PCH_GBE_FRAME_SIZE_8192 8192
54
55 #define PCH_GBE_GET_DESC(R, i, type) (&(((struct type *)((R).desc))[i]))
56 #define PCH_GBE_RX_DESC(R, i) PCH_GBE_GET_DESC(R, i, pch_gbe_rx_desc)
57 #define PCH_GBE_TX_DESC(R, i) PCH_GBE_GET_DESC(R, i, pch_gbe_tx_desc)
58 #define PCH_GBE_DESC_UNUSED(R) \
59 ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
60 (R)->next_to_clean - (R)->next_to_use - 1)
61
62 /* Pause packet value */
63 #define PCH_GBE_PAUSE_PKT1_VALUE 0x00C28001
64 #define PCH_GBE_PAUSE_PKT2_VALUE 0x00000100
65 #define PCH_GBE_PAUSE_PKT4_VALUE 0x01000888
66 #define PCH_GBE_PAUSE_PKT5_VALUE 0x0000FFFF
67
68 #define PCH_GBE_ETH_ALEN 6
69
70 /* This defines the bits that are set in the Interrupt Mask
71 * Set/Read Register. Each bit is documented below:
72 * o RXT0 = Receiver Timer Interrupt (ring 0)
73 * o TXDW = Transmit Descriptor Written Back
74 * o RXDMT0 = Receive Descriptor Minimum Threshold hit (ring 0)
75 * o RXSEQ = Receive Sequence Error
76 * o LSC = Link Status Change
77 */
78 #define PCH_GBE_INT_ENABLE_MASK ( \
79 PCH_GBE_INT_RX_DMA_CMPLT | \
80 PCH_GBE_INT_RX_DSC_EMP | \
81 PCH_GBE_INT_WOL_DET | \
82 PCH_GBE_INT_TX_CMPLT \
83 )
84
85
86 static unsigned int copybreak __read_mostly = PCH_GBE_COPYBREAK_DEFAULT;
87
88 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg);
89 static void pch_gbe_mdio_write(struct net_device *netdev, int addr, int reg,
90 int data);
91 /**
92 * pch_gbe_mac_read_mac_addr - Read MAC address
93 * @hw: Pointer to the HW structure
94 * Returns
95 * 0: Successful.
96 */
97 s32 pch_gbe_mac_read_mac_addr(struct pch_gbe_hw *hw)
98 {
99 u32 adr1a, adr1b;
100
101 adr1a = ioread32(&hw->reg->mac_adr[0].high);
102 adr1b = ioread32(&hw->reg->mac_adr[0].low);
103
104 hw->mac.addr[0] = (u8)(adr1a & 0xFF);
105 hw->mac.addr[1] = (u8)((adr1a >> 8) & 0xFF);
106 hw->mac.addr[2] = (u8)((adr1a >> 16) & 0xFF);
107 hw->mac.addr[3] = (u8)((adr1a >> 24) & 0xFF);
108 hw->mac.addr[4] = (u8)(adr1b & 0xFF);
109 hw->mac.addr[5] = (u8)((adr1b >> 8) & 0xFF);
110
111 pr_debug("hw->mac.addr : %pM\n", hw->mac.addr);
112 return 0;
113 }
114
115 /**
116 * pch_gbe_wait_clr_bit - Wait to clear a bit
117 * @reg: Pointer of register
118 * @busy: Busy bit
119 */
120 static void pch_gbe_wait_clr_bit(void *reg, u32 bit)
121 {
122 u32 tmp;
123 /* wait busy */
124 tmp = 1000;
125 while ((ioread32(reg) & bit) && --tmp)
126 cpu_relax();
127 if (!tmp)
128 pr_err("Error: busy bit is not cleared\n");
129 }
130 /**
131 * pch_gbe_mac_mar_set - Set MAC address register
132 * @hw: Pointer to the HW structure
133 * @addr: Pointer to the MAC address
134 * @index: MAC address array register
135 */
136 static void pch_gbe_mac_mar_set(struct pch_gbe_hw *hw, u8 * addr, u32 index)
137 {
138 u32 mar_low, mar_high, adrmask;
139
140 pr_debug("index : 0x%x\n", index);
141
142 /*
143 * HW expects these in little endian so we reverse the byte order
144 * from network order (big endian) to little endian
145 */
146 mar_high = ((u32) addr[0] | ((u32) addr[1] << 8) |
147 ((u32) addr[2] << 16) | ((u32) addr[3] << 24));
148 mar_low = ((u32) addr[4] | ((u32) addr[5] << 8));
149 /* Stop the MAC Address of index. */
150 adrmask = ioread32(&hw->reg->ADDR_MASK);
151 iowrite32((adrmask | (0x0001 << index)), &hw->reg->ADDR_MASK);
152 /* wait busy */
153 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
154 /* Set the MAC address to the MAC address 1A/1B register */
155 iowrite32(mar_high, &hw->reg->mac_adr[index].high);
156 iowrite32(mar_low, &hw->reg->mac_adr[index].low);
157 /* Start the MAC address of index */
158 iowrite32((adrmask & ~(0x0001 << index)), &hw->reg->ADDR_MASK);
159 /* wait busy */
160 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
161 }
162
163 /**
164 * pch_gbe_mac_reset_hw - Reset hardware
165 * @hw: Pointer to the HW structure
166 */
167 static void pch_gbe_mac_reset_hw(struct pch_gbe_hw *hw)
168 {
169 /* Read the MAC address. and store to the private data */
170 pch_gbe_mac_read_mac_addr(hw);
171 iowrite32(PCH_GBE_ALL_RST, &hw->reg->RESET);
172 #ifdef PCH_GBE_MAC_IFOP_RGMII
173 iowrite32(PCH_GBE_MODE_GMII_ETHER, &hw->reg->MODE);
174 #endif
175 pch_gbe_wait_clr_bit(&hw->reg->RESET, PCH_GBE_ALL_RST);
176 /* Setup the receive address */
177 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
178 return;
179 }
180
181 /**
182 * pch_gbe_mac_init_rx_addrs - Initialize receive address's
183 * @hw: Pointer to the HW structure
184 * @mar_count: Receive address registers
185 */
186 static void pch_gbe_mac_init_rx_addrs(struct pch_gbe_hw *hw, u16 mar_count)
187 {
188 u32 i;
189
190 /* Setup the receive address */
191 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
192
193 /* Zero out the other receive addresses */
194 for (i = 1; i < mar_count; i++) {
195 iowrite32(0, &hw->reg->mac_adr[i].high);
196 iowrite32(0, &hw->reg->mac_adr[i].low);
197 }
198 iowrite32(0xFFFE, &hw->reg->ADDR_MASK);
199 /* wait busy */
200 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
201 }
202
203
204 /**
205 * pch_gbe_mac_mc_addr_list_update - Update Multicast addresses
206 * @hw: Pointer to the HW structure
207 * @mc_addr_list: Array of multicast addresses to program
208 * @mc_addr_count: Number of multicast addresses to program
209 * @mar_used_count: The first MAC Address register free to program
210 * @mar_total_num: Total number of supported MAC Address Registers
211 */
212 static void pch_gbe_mac_mc_addr_list_update(struct pch_gbe_hw *hw,
213 u8 *mc_addr_list, u32 mc_addr_count,
214 u32 mar_used_count, u32 mar_total_num)
215 {
216 u32 i, adrmask;
217
218 /* Load the first set of multicast addresses into the exact
219 * filters (RAR). If there are not enough to fill the RAR
220 * array, clear the filters.
221 */
222 for (i = mar_used_count; i < mar_total_num; i++) {
223 if (mc_addr_count) {
224 pch_gbe_mac_mar_set(hw, mc_addr_list, i);
225 mc_addr_count--;
226 mc_addr_list += PCH_GBE_ETH_ALEN;
227 } else {
228 /* Clear MAC address mask */
229 adrmask = ioread32(&hw->reg->ADDR_MASK);
230 iowrite32((adrmask | (0x0001 << i)),
231 &hw->reg->ADDR_MASK);
232 /* wait busy */
233 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
234 /* Clear MAC address */
235 iowrite32(0, &hw->reg->mac_adr[i].high);
236 iowrite32(0, &hw->reg->mac_adr[i].low);
237 }
238 }
239 }
240
241 /**
242 * pch_gbe_mac_force_mac_fc - Force the MAC's flow control settings
243 * @hw: Pointer to the HW structure
244 * Returns
245 * 0: Successful.
246 * Negative value: Failed.
247 */
248 s32 pch_gbe_mac_force_mac_fc(struct pch_gbe_hw *hw)
249 {
250 struct pch_gbe_mac_info *mac = &hw->mac;
251 u32 rx_fctrl;
252
253 pr_debug("mac->fc = %u\n", mac->fc);
254
255 rx_fctrl = ioread32(&hw->reg->RX_FCTRL);
256
257 switch (mac->fc) {
258 case PCH_GBE_FC_NONE:
259 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
260 mac->tx_fc_enable = false;
261 break;
262 case PCH_GBE_FC_RX_PAUSE:
263 rx_fctrl |= PCH_GBE_FL_CTRL_EN;
264 mac->tx_fc_enable = false;
265 break;
266 case PCH_GBE_FC_TX_PAUSE:
267 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
268 mac->tx_fc_enable = true;
269 break;
270 case PCH_GBE_FC_FULL:
271 rx_fctrl |= PCH_GBE_FL_CTRL_EN;
272 mac->tx_fc_enable = true;
273 break;
274 default:
275 pr_err("Flow control param set incorrectly\n");
276 return -EINVAL;
277 }
278 if (mac->link_duplex == DUPLEX_HALF)
279 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
280 iowrite32(rx_fctrl, &hw->reg->RX_FCTRL);
281 pr_debug("RX_FCTRL reg : 0x%08x mac->tx_fc_enable : %d\n",
282 ioread32(&hw->reg->RX_FCTRL), mac->tx_fc_enable);
283 return 0;
284 }
285
286 /**
287 * pch_gbe_mac_set_wol_event - Set wake-on-lan event
288 * @hw: Pointer to the HW structure
289 * @wu_evt: Wake up event
290 */
291 static void pch_gbe_mac_set_wol_event(struct pch_gbe_hw *hw, u32 wu_evt)
292 {
293 u32 addr_mask;
294
295 pr_debug("wu_evt : 0x%08x ADDR_MASK reg : 0x%08x\n",
296 wu_evt, ioread32(&hw->reg->ADDR_MASK));
297
298 if (wu_evt) {
299 /* Set Wake-On-Lan address mask */
300 addr_mask = ioread32(&hw->reg->ADDR_MASK);
301 iowrite32(addr_mask, &hw->reg->WOL_ADDR_MASK);
302 /* wait busy */
303 pch_gbe_wait_clr_bit(&hw->reg->WOL_ADDR_MASK, PCH_GBE_WLA_BUSY);
304 iowrite32(0, &hw->reg->WOL_ST);
305 iowrite32((wu_evt | PCH_GBE_WLC_WOL_MODE), &hw->reg->WOL_CTRL);
306 iowrite32(0x02, &hw->reg->TCPIP_ACC);
307 iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
308 } else {
309 iowrite32(0, &hw->reg->WOL_CTRL);
310 iowrite32(0, &hw->reg->WOL_ST);
311 }
312 return;
313 }
314
315 /**
316 * pch_gbe_mac_ctrl_miim - Control MIIM interface
317 * @hw: Pointer to the HW structure
318 * @addr: Address of PHY
319 * @dir: Operetion. (Write or Read)
320 * @reg: Access register of PHY
321 * @data: Write data.
322 *
323 * Returns: Read date.
324 */
325 u16 pch_gbe_mac_ctrl_miim(struct pch_gbe_hw *hw, u32 addr, u32 dir, u32 reg,
326 u16 data)
327 {
328 u32 data_out = 0;
329 unsigned int i;
330 unsigned long flags;
331
332 spin_lock_irqsave(&hw->miim_lock, flags);
333
334 for (i = 100; i; --i) {
335 if ((ioread32(&hw->reg->MIIM) & PCH_GBE_MIIM_OPER_READY))
336 break;
337 udelay(20);
338 }
339 if (i == 0) {
340 pr_err("pch-gbe.miim won't go Ready\n");
341 spin_unlock_irqrestore(&hw->miim_lock, flags);
342 return 0; /* No way to indicate timeout error */
343 }
344 iowrite32(((reg << PCH_GBE_MIIM_REG_ADDR_SHIFT) |
345 (addr << PCH_GBE_MIIM_PHY_ADDR_SHIFT) |
346 dir | data), &hw->reg->MIIM);
347 for (i = 0; i < 100; i++) {
348 udelay(20);
349 data_out = ioread32(&hw->reg->MIIM);
350 if ((data_out & PCH_GBE_MIIM_OPER_READY))
351 break;
352 }
353 spin_unlock_irqrestore(&hw->miim_lock, flags);
354
355 pr_debug("PHY %s: reg=%d, data=0x%04X\n",
356 dir == PCH_GBE_MIIM_OPER_READ ? "READ" : "WRITE", reg,
357 dir == PCH_GBE_MIIM_OPER_READ ? data_out : data);
358 return (u16) data_out;
359 }
360
361 /**
362 * pch_gbe_mac_set_pause_packet - Set pause packet
363 * @hw: Pointer to the HW structure
364 */
365 static void pch_gbe_mac_set_pause_packet(struct pch_gbe_hw *hw)
366 {
367 unsigned long tmp2, tmp3;
368
369 /* Set Pause packet */
370 tmp2 = hw->mac.addr[1];
371 tmp2 = (tmp2 << 8) | hw->mac.addr[0];
372 tmp2 = PCH_GBE_PAUSE_PKT2_VALUE | (tmp2 << 16);
373
374 tmp3 = hw->mac.addr[5];
375 tmp3 = (tmp3 << 8) | hw->mac.addr[4];
376 tmp3 = (tmp3 << 8) | hw->mac.addr[3];
377 tmp3 = (tmp3 << 8) | hw->mac.addr[2];
378
379 iowrite32(PCH_GBE_PAUSE_PKT1_VALUE, &hw->reg->PAUSE_PKT1);
380 iowrite32(tmp2, &hw->reg->PAUSE_PKT2);
381 iowrite32(tmp3, &hw->reg->PAUSE_PKT3);
382 iowrite32(PCH_GBE_PAUSE_PKT4_VALUE, &hw->reg->PAUSE_PKT4);
383 iowrite32(PCH_GBE_PAUSE_PKT5_VALUE, &hw->reg->PAUSE_PKT5);
384
385 /* Transmit Pause Packet */
386 iowrite32(PCH_GBE_PS_PKT_RQ, &hw->reg->PAUSE_REQ);
387
388 pr_debug("PAUSE_PKT1-5 reg : 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n",
389 ioread32(&hw->reg->PAUSE_PKT1), ioread32(&hw->reg->PAUSE_PKT2),
390 ioread32(&hw->reg->PAUSE_PKT3), ioread32(&hw->reg->PAUSE_PKT4),
391 ioread32(&hw->reg->PAUSE_PKT5));
392
393 return;
394 }
395
396
397 /**
398 * pch_gbe_alloc_queues - Allocate memory for all rings
399 * @adapter: Board private structure to initialize
400 * Returns
401 * 0: Successfully
402 * Negative value: Failed
403 */
404 static int pch_gbe_alloc_queues(struct pch_gbe_adapter *adapter)
405 {
406 int size;
407
408 size = (int)sizeof(struct pch_gbe_tx_ring);
409 adapter->tx_ring = kzalloc(size, GFP_KERNEL);
410 if (!adapter->tx_ring)
411 return -ENOMEM;
412 size = (int)sizeof(struct pch_gbe_rx_ring);
413 adapter->rx_ring = kzalloc(size, GFP_KERNEL);
414 if (!adapter->rx_ring) {
415 kfree(adapter->tx_ring);
416 return -ENOMEM;
417 }
418 return 0;
419 }
420
421 /**
422 * pch_gbe_init_stats - Initialize status
423 * @adapter: Board private structure to initialize
424 */
425 static void pch_gbe_init_stats(struct pch_gbe_adapter *adapter)
426 {
427 memset(&adapter->stats, 0, sizeof(adapter->stats));
428 return;
429 }
430
431 /**
432 * pch_gbe_init_phy - Initialize PHY
433 * @adapter: Board private structure to initialize
434 * Returns
435 * 0: Successfully
436 * Negative value: Failed
437 */
438 static int pch_gbe_init_phy(struct pch_gbe_adapter *adapter)
439 {
440 struct net_device *netdev = adapter->netdev;
441 u32 addr;
442 u16 bmcr, stat;
443
444 /* Discover phy addr by searching addrs in order {1,0,2,..., 31} */
445 for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
446 adapter->mii.phy_id = (addr == 0) ? 1 : (addr == 1) ? 0 : addr;
447 bmcr = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMCR);
448 stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
449 stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
450 if (!((bmcr == 0xFFFF) || ((stat == 0) && (bmcr == 0))))
451 break;
452 }
453 adapter->hw.phy.addr = adapter->mii.phy_id;
454 pr_debug("phy_addr = %d\n", adapter->mii.phy_id);
455 if (addr == 32)
456 return -EAGAIN;
457 /* Selected the phy and isolate the rest */
458 for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
459 if (addr != adapter->mii.phy_id) {
460 pch_gbe_mdio_write(netdev, addr, MII_BMCR,
461 BMCR_ISOLATE);
462 } else {
463 bmcr = pch_gbe_mdio_read(netdev, addr, MII_BMCR);
464 pch_gbe_mdio_write(netdev, addr, MII_BMCR,
465 bmcr & ~BMCR_ISOLATE);
466 }
467 }
468
469 /* MII setup */
470 adapter->mii.phy_id_mask = 0x1F;
471 adapter->mii.reg_num_mask = 0x1F;
472 adapter->mii.dev = adapter->netdev;
473 adapter->mii.mdio_read = pch_gbe_mdio_read;
474 adapter->mii.mdio_write = pch_gbe_mdio_write;
475 adapter->mii.supports_gmii = mii_check_gmii_support(&adapter->mii);
476 return 0;
477 }
478
479 /**
480 * pch_gbe_mdio_read - The read function for mii
481 * @netdev: Network interface device structure
482 * @addr: Phy ID
483 * @reg: Access location
484 * Returns
485 * 0: Successfully
486 * Negative value: Failed
487 */
488 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg)
489 {
490 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
491 struct pch_gbe_hw *hw = &adapter->hw;
492
493 return pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_READ, reg,
494 (u16) 0);
495 }
496
497 /**
498 * pch_gbe_mdio_write - The write function for mii
499 * @netdev: Network interface device structure
500 * @addr: Phy ID (not used)
501 * @reg: Access location
502 * @data: Write data
503 */
504 static void pch_gbe_mdio_write(struct net_device *netdev,
505 int addr, int reg, int data)
506 {
507 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
508 struct pch_gbe_hw *hw = &adapter->hw;
509
510 pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_WRITE, reg, data);
511 }
512
513 /**
514 * pch_gbe_reset_task - Reset processing at the time of transmission timeout
515 * @work: Pointer of board private structure
516 */
517 static void pch_gbe_reset_task(struct work_struct *work)
518 {
519 struct pch_gbe_adapter *adapter;
520 adapter = container_of(work, struct pch_gbe_adapter, reset_task);
521
522 pch_gbe_reinit_locked(adapter);
523 }
524
525 /**
526 * pch_gbe_reinit_locked- Re-initialization
527 * @adapter: Board private structure
528 */
529 void pch_gbe_reinit_locked(struct pch_gbe_adapter *adapter)
530 {
531 struct net_device *netdev = adapter->netdev;
532
533 rtnl_lock();
534 if (netif_running(netdev)) {
535 pch_gbe_down(adapter);
536 pch_gbe_up(adapter);
537 }
538 rtnl_unlock();
539 }
540
541 /**
542 * pch_gbe_reset - Reset GbE
543 * @adapter: Board private structure
544 */
545 void pch_gbe_reset(struct pch_gbe_adapter *adapter)
546 {
547 pch_gbe_mac_reset_hw(&adapter->hw);
548 /* Setup the receive address. */
549 pch_gbe_mac_init_rx_addrs(&adapter->hw, PCH_GBE_MAR_ENTRIES);
550 if (pch_gbe_hal_init_hw(&adapter->hw))
551 pr_err("Hardware Error\n");
552 }
553
554 /**
555 * pch_gbe_free_irq - Free an interrupt
556 * @adapter: Board private structure
557 */
558 static void pch_gbe_free_irq(struct pch_gbe_adapter *adapter)
559 {
560 struct net_device *netdev = adapter->netdev;
561
562 free_irq(adapter->pdev->irq, netdev);
563 if (adapter->have_msi) {
564 pci_disable_msi(adapter->pdev);
565 pr_debug("call pci_disable_msi\n");
566 }
567 }
568
569 /**
570 * pch_gbe_irq_disable - Mask off interrupt generation on the NIC
571 * @adapter: Board private structure
572 */
573 static void pch_gbe_irq_disable(struct pch_gbe_adapter *adapter)
574 {
575 struct pch_gbe_hw *hw = &adapter->hw;
576
577 atomic_inc(&adapter->irq_sem);
578 iowrite32(0, &hw->reg->INT_EN);
579 ioread32(&hw->reg->INT_ST);
580 synchronize_irq(adapter->pdev->irq);
581
582 pr_debug("INT_EN reg : 0x%08x\n", ioread32(&hw->reg->INT_EN));
583 }
584
585 /**
586 * pch_gbe_irq_enable - Enable default interrupt generation settings
587 * @adapter: Board private structure
588 */
589 static void pch_gbe_irq_enable(struct pch_gbe_adapter *adapter)
590 {
591 struct pch_gbe_hw *hw = &adapter->hw;
592
593 if (likely(atomic_dec_and_test(&adapter->irq_sem)))
594 iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
595 ioread32(&hw->reg->INT_ST);
596 pr_debug("INT_EN reg : 0x%08x\n", ioread32(&hw->reg->INT_EN));
597 }
598
599
600
601 /**
602 * pch_gbe_setup_tctl - configure the Transmit control registers
603 * @adapter: Board private structure
604 */
605 static void pch_gbe_setup_tctl(struct pch_gbe_adapter *adapter)
606 {
607 struct pch_gbe_hw *hw = &adapter->hw;
608 u32 tx_mode, tcpip;
609
610 tx_mode = PCH_GBE_TM_LONG_PKT |
611 PCH_GBE_TM_ST_AND_FD |
612 PCH_GBE_TM_SHORT_PKT |
613 PCH_GBE_TM_TH_TX_STRT_8 |
614 PCH_GBE_TM_TH_ALM_EMP_4 | PCH_GBE_TM_TH_ALM_FULL_8;
615
616 iowrite32(tx_mode, &hw->reg->TX_MODE);
617
618 tcpip = ioread32(&hw->reg->TCPIP_ACC);
619 tcpip |= PCH_GBE_TX_TCPIPACC_EN;
620 iowrite32(tcpip, &hw->reg->TCPIP_ACC);
621 return;
622 }
623
624 /**
625 * pch_gbe_configure_tx - Configure Transmit Unit after Reset
626 * @adapter: Board private structure
627 */
628 static void pch_gbe_configure_tx(struct pch_gbe_adapter *adapter)
629 {
630 struct pch_gbe_hw *hw = &adapter->hw;
631 u32 tdba, tdlen, dctrl;
632
633 pr_debug("dma addr = 0x%08llx size = 0x%08x\n",
634 (unsigned long long)adapter->tx_ring->dma,
635 adapter->tx_ring->size);
636
637 /* Setup the HW Tx Head and Tail descriptor pointers */
638 tdba = adapter->tx_ring->dma;
639 tdlen = adapter->tx_ring->size - 0x10;
640 iowrite32(tdba, &hw->reg->TX_DSC_BASE);
641 iowrite32(tdlen, &hw->reg->TX_DSC_SIZE);
642 iowrite32(tdba, &hw->reg->TX_DSC_SW_P);
643
644 /* Enables Transmission DMA */
645 dctrl = ioread32(&hw->reg->DMA_CTRL);
646 dctrl |= PCH_GBE_TX_DMA_EN;
647 iowrite32(dctrl, &hw->reg->DMA_CTRL);
648 }
649
650 /**
651 * pch_gbe_setup_rctl - Configure the receive control registers
652 * @adapter: Board private structure
653 */
654 static void pch_gbe_setup_rctl(struct pch_gbe_adapter *adapter)
655 {
656 struct pch_gbe_hw *hw = &adapter->hw;
657 u32 rx_mode, tcpip;
658
659 rx_mode = PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN |
660 PCH_GBE_RH_ALM_EMP_4 | PCH_GBE_RH_ALM_FULL_4 | PCH_GBE_RH_RD_TRG_8;
661
662 iowrite32(rx_mode, &hw->reg->RX_MODE);
663
664 tcpip = ioread32(&hw->reg->TCPIP_ACC);
665
666 if (adapter->rx_csum) {
667 tcpip &= ~PCH_GBE_RX_TCPIPACC_OFF;
668 tcpip |= PCH_GBE_RX_TCPIPACC_EN;
669 } else {
670 tcpip |= PCH_GBE_RX_TCPIPACC_OFF;
671 tcpip &= ~PCH_GBE_RX_TCPIPACC_EN;
672 }
673 iowrite32(tcpip, &hw->reg->TCPIP_ACC);
674 return;
675 }
676
677 /**
678 * pch_gbe_configure_rx - Configure Receive Unit after Reset
679 * @adapter: Board private structure
680 */
681 static void pch_gbe_configure_rx(struct pch_gbe_adapter *adapter)
682 {
683 struct pch_gbe_hw *hw = &adapter->hw;
684 u32 rdba, rdlen, rctl, rxdma;
685
686 pr_debug("dma adr = 0x%08llx size = 0x%08x\n",
687 (unsigned long long)adapter->rx_ring->dma,
688 adapter->rx_ring->size);
689
690 pch_gbe_mac_force_mac_fc(hw);
691
692 /* Disables Receive MAC */
693 rctl = ioread32(&hw->reg->MAC_RX_EN);
694 iowrite32((rctl & ~PCH_GBE_MRE_MAC_RX_EN), &hw->reg->MAC_RX_EN);
695
696 /* Disables Receive DMA */
697 rxdma = ioread32(&hw->reg->DMA_CTRL);
698 rxdma &= ~PCH_GBE_RX_DMA_EN;
699 iowrite32(rxdma, &hw->reg->DMA_CTRL);
700
701 pr_debug("MAC_RX_EN reg = 0x%08x DMA_CTRL reg = 0x%08x\n",
702 ioread32(&hw->reg->MAC_RX_EN),
703 ioread32(&hw->reg->DMA_CTRL));
704
705 /* Setup the HW Rx Head and Tail Descriptor Pointers and
706 * the Base and Length of the Rx Descriptor Ring */
707 rdba = adapter->rx_ring->dma;
708 rdlen = adapter->rx_ring->size - 0x10;
709 iowrite32(rdba, &hw->reg->RX_DSC_BASE);
710 iowrite32(rdlen, &hw->reg->RX_DSC_SIZE);
711 iowrite32((rdba + rdlen), &hw->reg->RX_DSC_SW_P);
712
713 /* Enables Receive DMA */
714 rxdma = ioread32(&hw->reg->DMA_CTRL);
715 rxdma |= PCH_GBE_RX_DMA_EN;
716 iowrite32(rxdma, &hw->reg->DMA_CTRL);
717 /* Enables Receive */
718 iowrite32(PCH_GBE_MRE_MAC_RX_EN, &hw->reg->MAC_RX_EN);
719 }
720
721 /**
722 * pch_gbe_unmap_and_free_tx_resource - Unmap and free tx socket buffer
723 * @adapter: Board private structure
724 * @buffer_info: Buffer information structure
725 */
726 static void pch_gbe_unmap_and_free_tx_resource(
727 struct pch_gbe_adapter *adapter, struct pch_gbe_buffer *buffer_info)
728 {
729 if (buffer_info->mapped) {
730 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
731 buffer_info->length, DMA_TO_DEVICE);
732 buffer_info->mapped = false;
733 }
734 if (buffer_info->skb) {
735 dev_kfree_skb_any(buffer_info->skb);
736 buffer_info->skb = NULL;
737 }
738 }
739
740 /**
741 * pch_gbe_unmap_and_free_rx_resource - Unmap and free rx socket buffer
742 * @adapter: Board private structure
743 * @buffer_info: Buffer information structure
744 */
745 static void pch_gbe_unmap_and_free_rx_resource(
746 struct pch_gbe_adapter *adapter,
747 struct pch_gbe_buffer *buffer_info)
748 {
749 if (buffer_info->mapped) {
750 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
751 buffer_info->length, DMA_FROM_DEVICE);
752 buffer_info->mapped = false;
753 }
754 if (buffer_info->skb) {
755 dev_kfree_skb_any(buffer_info->skb);
756 buffer_info->skb = NULL;
757 }
758 }
759
760 /**
761 * pch_gbe_clean_tx_ring - Free Tx Buffers
762 * @adapter: Board private structure
763 * @tx_ring: Ring to be cleaned
764 */
765 static void pch_gbe_clean_tx_ring(struct pch_gbe_adapter *adapter,
766 struct pch_gbe_tx_ring *tx_ring)
767 {
768 struct pch_gbe_hw *hw = &adapter->hw;
769 struct pch_gbe_buffer *buffer_info;
770 unsigned long size;
771 unsigned int i;
772
773 /* Free all the Tx ring sk_buffs */
774 for (i = 0; i < tx_ring->count; i++) {
775 buffer_info = &tx_ring->buffer_info[i];
776 pch_gbe_unmap_and_free_tx_resource(adapter, buffer_info);
777 }
778 pr_debug("call pch_gbe_unmap_and_free_tx_resource() %d count\n", i);
779
780 size = (unsigned long)sizeof(struct pch_gbe_buffer) * tx_ring->count;
781 memset(tx_ring->buffer_info, 0, size);
782
783 /* Zero out the descriptor ring */
784 memset(tx_ring->desc, 0, tx_ring->size);
785 tx_ring->next_to_use = 0;
786 tx_ring->next_to_clean = 0;
787 iowrite32(tx_ring->dma, &hw->reg->TX_DSC_HW_P);
788 iowrite32((tx_ring->size - 0x10), &hw->reg->TX_DSC_SIZE);
789 }
790
791 /**
792 * pch_gbe_clean_rx_ring - Free Rx Buffers
793 * @adapter: Board private structure
794 * @rx_ring: Ring to free buffers from
795 */
796 static void
797 pch_gbe_clean_rx_ring(struct pch_gbe_adapter *adapter,
798 struct pch_gbe_rx_ring *rx_ring)
799 {
800 struct pch_gbe_hw *hw = &adapter->hw;
801 struct pch_gbe_buffer *buffer_info;
802 unsigned long size;
803 unsigned int i;
804
805 /* Free all the Rx ring sk_buffs */
806 for (i = 0; i < rx_ring->count; i++) {
807 buffer_info = &rx_ring->buffer_info[i];
808 pch_gbe_unmap_and_free_rx_resource(adapter, buffer_info);
809 }
810 pr_debug("call pch_gbe_unmap_and_free_rx_resource() %d count\n", i);
811 size = (unsigned long)sizeof(struct pch_gbe_buffer) * rx_ring->count;
812 memset(rx_ring->buffer_info, 0, size);
813
814 /* Zero out the descriptor ring */
815 memset(rx_ring->desc, 0, rx_ring->size);
816 rx_ring->next_to_clean = 0;
817 rx_ring->next_to_use = 0;
818 iowrite32(rx_ring->dma, &hw->reg->RX_DSC_HW_P);
819 iowrite32((rx_ring->size - 0x10), &hw->reg->RX_DSC_SIZE);
820 }
821
822 static void pch_gbe_set_rgmii_ctrl(struct pch_gbe_adapter *adapter, u16 speed,
823 u16 duplex)
824 {
825 struct pch_gbe_hw *hw = &adapter->hw;
826 unsigned long rgmii = 0;
827
828 /* Set the RGMII control. */
829 #ifdef PCH_GBE_MAC_IFOP_RGMII
830 switch (speed) {
831 case SPEED_10:
832 rgmii = (PCH_GBE_RGMII_RATE_2_5M |
833 PCH_GBE_MAC_RGMII_CTRL_SETTING);
834 break;
835 case SPEED_100:
836 rgmii = (PCH_GBE_RGMII_RATE_25M |
837 PCH_GBE_MAC_RGMII_CTRL_SETTING);
838 break;
839 case SPEED_1000:
840 rgmii = (PCH_GBE_RGMII_RATE_125M |
841 PCH_GBE_MAC_RGMII_CTRL_SETTING);
842 break;
843 }
844 iowrite32(rgmii, &hw->reg->RGMII_CTRL);
845 #else /* GMII */
846 rgmii = 0;
847 iowrite32(rgmii, &hw->reg->RGMII_CTRL);
848 #endif
849 }
850 static void pch_gbe_set_mode(struct pch_gbe_adapter *adapter, u16 speed,
851 u16 duplex)
852 {
853 struct net_device *netdev = adapter->netdev;
854 struct pch_gbe_hw *hw = &adapter->hw;
855 unsigned long mode = 0;
856
857 /* Set the communication mode */
858 switch (speed) {
859 case SPEED_10:
860 mode = PCH_GBE_MODE_MII_ETHER;
861 netdev->tx_queue_len = 10;
862 break;
863 case SPEED_100:
864 mode = PCH_GBE_MODE_MII_ETHER;
865 netdev->tx_queue_len = 100;
866 break;
867 case SPEED_1000:
868 mode = PCH_GBE_MODE_GMII_ETHER;
869 break;
870 }
871 if (duplex == DUPLEX_FULL)
872 mode |= PCH_GBE_MODE_FULL_DUPLEX;
873 else
874 mode |= PCH_GBE_MODE_HALF_DUPLEX;
875 iowrite32(mode, &hw->reg->MODE);
876 }
877
878 /**
879 * pch_gbe_watchdog - Watchdog process
880 * @data: Board private structure
881 */
882 static void pch_gbe_watchdog(unsigned long data)
883 {
884 struct pch_gbe_adapter *adapter = (struct pch_gbe_adapter *)data;
885 struct net_device *netdev = adapter->netdev;
886 struct pch_gbe_hw *hw = &adapter->hw;
887 struct ethtool_cmd cmd;
888
889 pr_debug("right now = %ld\n", jiffies);
890
891 pch_gbe_update_stats(adapter);
892 if ((mii_link_ok(&adapter->mii)) && (!netif_carrier_ok(netdev))) {
893 netdev->tx_queue_len = adapter->tx_queue_len;
894 /* mii library handles link maintenance tasks */
895 if (mii_ethtool_gset(&adapter->mii, &cmd)) {
896 pr_err("ethtool get setting Error\n");
897 mod_timer(&adapter->watchdog_timer,
898 round_jiffies(jiffies +
899 PCH_GBE_WATCHDOG_PERIOD));
900 return;
901 }
902 hw->mac.link_speed = cmd.speed;
903 hw->mac.link_duplex = cmd.duplex;
904 /* Set the RGMII control. */
905 pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
906 hw->mac.link_duplex);
907 /* Set the communication mode */
908 pch_gbe_set_mode(adapter, hw->mac.link_speed,
909 hw->mac.link_duplex);
910 netdev_dbg(netdev,
911 "Link is Up %d Mbps %s-Duplex\n",
912 cmd.speed,
913 cmd.duplex == DUPLEX_FULL ? "Full" : "Half");
914 netif_carrier_on(netdev);
915 netif_wake_queue(netdev);
916 } else if ((!mii_link_ok(&adapter->mii)) &&
917 (netif_carrier_ok(netdev))) {
918 netdev_dbg(netdev, "NIC Link is Down\n");
919 hw->mac.link_speed = SPEED_10;
920 hw->mac.link_duplex = DUPLEX_HALF;
921 netif_carrier_off(netdev);
922 netif_stop_queue(netdev);
923 }
924 mod_timer(&adapter->watchdog_timer,
925 round_jiffies(jiffies + PCH_GBE_WATCHDOG_PERIOD));
926 }
927
928 /**
929 * pch_gbe_tx_queue - Carry out queuing of the transmission data
930 * @adapter: Board private structure
931 * @tx_ring: Tx descriptor ring structure
932 * @skb: Sockt buffer structure
933 */
934 static void pch_gbe_tx_queue(struct pch_gbe_adapter *adapter,
935 struct pch_gbe_tx_ring *tx_ring,
936 struct sk_buff *skb)
937 {
938 struct pch_gbe_hw *hw = &adapter->hw;
939 struct pch_gbe_tx_desc *tx_desc;
940 struct pch_gbe_buffer *buffer_info;
941 struct sk_buff *tmp_skb;
942 unsigned int frame_ctrl;
943 unsigned int ring_num;
944 unsigned long flags;
945
946 /*-- Set frame control --*/
947 frame_ctrl = 0;
948 if (unlikely(skb->len < PCH_GBE_SHORT_PKT))
949 frame_ctrl |= PCH_GBE_TXD_CTRL_APAD;
950 if (unlikely(!adapter->tx_csum))
951 frame_ctrl |= PCH_GBE_TXD_CTRL_TCPIP_ACC_OFF;
952
953 /* Performs checksum processing */
954 /*
955 * It is because the hardware accelerator does not support a checksum,
956 * when the received data size is less than 64 bytes.
957 */
958 if ((skb->len < PCH_GBE_SHORT_PKT) && (adapter->tx_csum)) {
959 frame_ctrl |= PCH_GBE_TXD_CTRL_APAD |
960 PCH_GBE_TXD_CTRL_TCPIP_ACC_OFF;
961 if (skb->protocol == htons(ETH_P_IP)) {
962 struct iphdr *iph = ip_hdr(skb);
963 unsigned int offset;
964 iph->check = 0;
965 iph->check = ip_fast_csum((u8 *) iph, iph->ihl);
966 offset = skb_transport_offset(skb);
967 if (iph->protocol == IPPROTO_TCP) {
968 skb->csum = 0;
969 tcp_hdr(skb)->check = 0;
970 skb->csum = skb_checksum(skb, offset,
971 skb->len - offset, 0);
972 tcp_hdr(skb)->check =
973 csum_tcpudp_magic(iph->saddr,
974 iph->daddr,
975 skb->len - offset,
976 IPPROTO_TCP,
977 skb->csum);
978 } else if (iph->protocol == IPPROTO_UDP) {
979 skb->csum = 0;
980 udp_hdr(skb)->check = 0;
981 skb->csum =
982 skb_checksum(skb, offset,
983 skb->len - offset, 0);
984 udp_hdr(skb)->check =
985 csum_tcpudp_magic(iph->saddr,
986 iph->daddr,
987 skb->len - offset,
988 IPPROTO_UDP,
989 skb->csum);
990 }
991 }
992 }
993 spin_lock_irqsave(&tx_ring->tx_lock, flags);
994 ring_num = tx_ring->next_to_use;
995 if (unlikely((ring_num + 1) == tx_ring->count))
996 tx_ring->next_to_use = 0;
997 else
998 tx_ring->next_to_use = ring_num + 1;
999
1000 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1001 buffer_info = &tx_ring->buffer_info[ring_num];
1002 tmp_skb = buffer_info->skb;
1003
1004 /* [Header:14][payload] ---> [Header:14][paddong:2][payload] */
1005 memcpy(tmp_skb->data, skb->data, ETH_HLEN);
1006 tmp_skb->data[ETH_HLEN] = 0x00;
1007 tmp_skb->data[ETH_HLEN + 1] = 0x00;
1008 tmp_skb->len = skb->len;
1009 memcpy(&tmp_skb->data[ETH_HLEN + 2], &skb->data[ETH_HLEN],
1010 (skb->len - ETH_HLEN));
1011 /*-- Set Buffer infomation --*/
1012 buffer_info->length = tmp_skb->len;
1013 buffer_info->dma = dma_map_single(&adapter->pdev->dev, tmp_skb->data,
1014 buffer_info->length,
1015 DMA_TO_DEVICE);
1016 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
1017 pr_err("TX DMA map failed\n");
1018 buffer_info->dma = 0;
1019 buffer_info->time_stamp = 0;
1020 tx_ring->next_to_use = ring_num;
1021 return;
1022 }
1023 buffer_info->mapped = true;
1024 buffer_info->time_stamp = jiffies;
1025
1026 /*-- Set Tx descriptor --*/
1027 tx_desc = PCH_GBE_TX_DESC(*tx_ring, ring_num);
1028 tx_desc->buffer_addr = (buffer_info->dma);
1029 tx_desc->length = (tmp_skb->len);
1030 tx_desc->tx_words_eob = ((tmp_skb->len + 3));
1031 tx_desc->tx_frame_ctrl = (frame_ctrl);
1032 tx_desc->gbec_status = (DSC_INIT16);
1033
1034 if (unlikely(++ring_num == tx_ring->count))
1035 ring_num = 0;
1036
1037 /* Update software pointer of TX descriptor */
1038 iowrite32(tx_ring->dma +
1039 (int)sizeof(struct pch_gbe_tx_desc) * ring_num,
1040 &hw->reg->TX_DSC_SW_P);
1041 dev_kfree_skb_any(skb);
1042 }
1043
1044 /**
1045 * pch_gbe_update_stats - Update the board statistics counters
1046 * @adapter: Board private structure
1047 */
1048 void pch_gbe_update_stats(struct pch_gbe_adapter *adapter)
1049 {
1050 struct net_device *netdev = adapter->netdev;
1051 struct pci_dev *pdev = adapter->pdev;
1052 struct pch_gbe_hw_stats *stats = &adapter->stats;
1053 unsigned long flags;
1054
1055 /*
1056 * Prevent stats update while adapter is being reset, or if the pci
1057 * connection is down.
1058 */
1059 if ((pdev->error_state) && (pdev->error_state != pci_channel_io_normal))
1060 return;
1061
1062 spin_lock_irqsave(&adapter->stats_lock, flags);
1063
1064 /* Update device status "adapter->stats" */
1065 stats->rx_errors = stats->rx_crc_errors + stats->rx_frame_errors;
1066 stats->tx_errors = stats->tx_length_errors +
1067 stats->tx_aborted_errors +
1068 stats->tx_carrier_errors + stats->tx_timeout_count;
1069
1070 /* Update network device status "adapter->net_stats" */
1071 netdev->stats.rx_packets = stats->rx_packets;
1072 netdev->stats.rx_bytes = stats->rx_bytes;
1073 netdev->stats.rx_dropped = stats->rx_dropped;
1074 netdev->stats.tx_packets = stats->tx_packets;
1075 netdev->stats.tx_bytes = stats->tx_bytes;
1076 netdev->stats.tx_dropped = stats->tx_dropped;
1077 /* Fill out the OS statistics structure */
1078 netdev->stats.multicast = stats->multicast;
1079 netdev->stats.collisions = stats->collisions;
1080 /* Rx Errors */
1081 netdev->stats.rx_errors = stats->rx_errors;
1082 netdev->stats.rx_crc_errors = stats->rx_crc_errors;
1083 netdev->stats.rx_frame_errors = stats->rx_frame_errors;
1084 /* Tx Errors */
1085 netdev->stats.tx_errors = stats->tx_errors;
1086 netdev->stats.tx_aborted_errors = stats->tx_aborted_errors;
1087 netdev->stats.tx_carrier_errors = stats->tx_carrier_errors;
1088
1089 spin_unlock_irqrestore(&adapter->stats_lock, flags);
1090 }
1091
1092 /**
1093 * pch_gbe_intr - Interrupt Handler
1094 * @irq: Interrupt number
1095 * @data: Pointer to a network interface device structure
1096 * Returns
1097 * - IRQ_HANDLED: Our interrupt
1098 * - IRQ_NONE: Not our interrupt
1099 */
1100 static irqreturn_t pch_gbe_intr(int irq, void *data)
1101 {
1102 struct net_device *netdev = data;
1103 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1104 struct pch_gbe_hw *hw = &adapter->hw;
1105 u32 int_st;
1106 u32 int_en;
1107
1108 /* Check request status */
1109 int_st = ioread32(&hw->reg->INT_ST);
1110 int_st = int_st & ioread32(&hw->reg->INT_EN);
1111 /* When request status is no interruption factor */
1112 if (unlikely(!int_st))
1113 return IRQ_NONE; /* Not our interrupt. End processing. */
1114 pr_debug("%s occur int_st = 0x%08x\n", __func__, int_st);
1115 if (int_st & PCH_GBE_INT_RX_FRAME_ERR)
1116 adapter->stats.intr_rx_frame_err_count++;
1117 if (int_st & PCH_GBE_INT_RX_FIFO_ERR)
1118 adapter->stats.intr_rx_fifo_err_count++;
1119 if (int_st & PCH_GBE_INT_RX_DMA_ERR)
1120 adapter->stats.intr_rx_dma_err_count++;
1121 if (int_st & PCH_GBE_INT_TX_FIFO_ERR)
1122 adapter->stats.intr_tx_fifo_err_count++;
1123 if (int_st & PCH_GBE_INT_TX_DMA_ERR)
1124 adapter->stats.intr_tx_dma_err_count++;
1125 if (int_st & PCH_GBE_INT_TCPIP_ERR)
1126 adapter->stats.intr_tcpip_err_count++;
1127 /* When Rx descriptor is empty */
1128 if ((int_st & PCH_GBE_INT_RX_DSC_EMP)) {
1129 adapter->stats.intr_rx_dsc_empty_count++;
1130 pr_err("Rx descriptor is empty\n");
1131 int_en = ioread32(&hw->reg->INT_EN);
1132 iowrite32((int_en & ~PCH_GBE_INT_RX_DSC_EMP), &hw->reg->INT_EN);
1133 if (hw->mac.tx_fc_enable) {
1134 /* Set Pause packet */
1135 pch_gbe_mac_set_pause_packet(hw);
1136 }
1137 if ((int_en & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT))
1138 == 0) {
1139 return IRQ_HANDLED;
1140 }
1141 }
1142
1143 /* When request status is Receive interruption */
1144 if ((int_st & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT))) {
1145 if (likely(napi_schedule_prep(&adapter->napi))) {
1146 /* Enable only Rx Descriptor empty */
1147 atomic_inc(&adapter->irq_sem);
1148 int_en = ioread32(&hw->reg->INT_EN);
1149 int_en &=
1150 ~(PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT);
1151 iowrite32(int_en, &hw->reg->INT_EN);
1152 /* Start polling for NAPI */
1153 __napi_schedule(&adapter->napi);
1154 }
1155 }
1156 pr_debug("return = 0x%08x INT_EN reg = 0x%08x\n",
1157 IRQ_HANDLED, ioread32(&hw->reg->INT_EN));
1158 return IRQ_HANDLED;
1159 }
1160
1161 /**
1162 * pch_gbe_alloc_rx_buffers - Replace used receive buffers; legacy & extended
1163 * @adapter: Board private structure
1164 * @rx_ring: Rx descriptor ring
1165 * @cleaned_count: Cleaned count
1166 */
1167 static void
1168 pch_gbe_alloc_rx_buffers(struct pch_gbe_adapter *adapter,
1169 struct pch_gbe_rx_ring *rx_ring, int cleaned_count)
1170 {
1171 struct net_device *netdev = adapter->netdev;
1172 struct pci_dev *pdev = adapter->pdev;
1173 struct pch_gbe_hw *hw = &adapter->hw;
1174 struct pch_gbe_rx_desc *rx_desc;
1175 struct pch_gbe_buffer *buffer_info;
1176 struct sk_buff *skb;
1177 unsigned int i;
1178 unsigned int bufsz;
1179
1180 bufsz = adapter->rx_buffer_len + PCH_GBE_DMA_ALIGN;
1181 i = rx_ring->next_to_use;
1182
1183 while ((cleaned_count--)) {
1184 buffer_info = &rx_ring->buffer_info[i];
1185 skb = buffer_info->skb;
1186 if (skb) {
1187 skb_trim(skb, 0);
1188 } else {
1189 skb = netdev_alloc_skb(netdev, bufsz);
1190 if (unlikely(!skb)) {
1191 /* Better luck next round */
1192 adapter->stats.rx_alloc_buff_failed++;
1193 break;
1194 }
1195 /* 64byte align */
1196 skb_reserve(skb, PCH_GBE_DMA_ALIGN);
1197
1198 buffer_info->skb = skb;
1199 buffer_info->length = adapter->rx_buffer_len;
1200 }
1201 buffer_info->dma = dma_map_single(&pdev->dev,
1202 skb->data,
1203 buffer_info->length,
1204 DMA_FROM_DEVICE);
1205 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
1206 dev_kfree_skb(skb);
1207 buffer_info->skb = NULL;
1208 buffer_info->dma = 0;
1209 adapter->stats.rx_alloc_buff_failed++;
1210 break; /* while !buffer_info->skb */
1211 }
1212 buffer_info->mapped = true;
1213 rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
1214 rx_desc->buffer_addr = (buffer_info->dma);
1215 rx_desc->gbec_status = DSC_INIT16;
1216
1217 pr_debug("i = %d buffer_info->dma = 0x08%llx buffer_info->length = 0x%x\n",
1218 i, (unsigned long long)buffer_info->dma,
1219 buffer_info->length);
1220
1221 if (unlikely(++i == rx_ring->count))
1222 i = 0;
1223 }
1224 if (likely(rx_ring->next_to_use != i)) {
1225 rx_ring->next_to_use = i;
1226 if (unlikely(i-- == 0))
1227 i = (rx_ring->count - 1);
1228 iowrite32(rx_ring->dma +
1229 (int)sizeof(struct pch_gbe_rx_desc) * i,
1230 &hw->reg->RX_DSC_SW_P);
1231 }
1232 return;
1233 }
1234
1235 /**
1236 * pch_gbe_alloc_tx_buffers - Allocate transmit buffers
1237 * @adapter: Board private structure
1238 * @tx_ring: Tx descriptor ring
1239 */
1240 static void pch_gbe_alloc_tx_buffers(struct pch_gbe_adapter *adapter,
1241 struct pch_gbe_tx_ring *tx_ring)
1242 {
1243 struct pch_gbe_buffer *buffer_info;
1244 struct sk_buff *skb;
1245 unsigned int i;
1246 unsigned int bufsz;
1247 struct pch_gbe_tx_desc *tx_desc;
1248
1249 bufsz =
1250 adapter->hw.mac.max_frame_size + PCH_GBE_DMA_ALIGN + NET_IP_ALIGN;
1251
1252 for (i = 0; i < tx_ring->count; i++) {
1253 buffer_info = &tx_ring->buffer_info[i];
1254 skb = netdev_alloc_skb(adapter->netdev, bufsz);
1255 skb_reserve(skb, PCH_GBE_DMA_ALIGN);
1256 buffer_info->skb = skb;
1257 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1258 tx_desc->gbec_status = (DSC_INIT16);
1259 }
1260 return;
1261 }
1262
1263 /**
1264 * pch_gbe_clean_tx - Reclaim resources after transmit completes
1265 * @adapter: Board private structure
1266 * @tx_ring: Tx descriptor ring
1267 * Returns
1268 * true: Cleaned the descriptor
1269 * false: Not cleaned the descriptor
1270 */
1271 static bool
1272 pch_gbe_clean_tx(struct pch_gbe_adapter *adapter,
1273 struct pch_gbe_tx_ring *tx_ring)
1274 {
1275 struct pch_gbe_tx_desc *tx_desc;
1276 struct pch_gbe_buffer *buffer_info;
1277 struct sk_buff *skb;
1278 unsigned int i;
1279 unsigned int cleaned_count = 0;
1280 bool cleaned = false;
1281
1282 pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean);
1283
1284 i = tx_ring->next_to_clean;
1285 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1286 pr_debug("gbec_status:0x%04x dma_status:0x%04x\n",
1287 tx_desc->gbec_status, tx_desc->dma_status);
1288
1289 while ((tx_desc->gbec_status & DSC_INIT16) == 0x0000) {
1290 pr_debug("gbec_status:0x%04x\n", tx_desc->gbec_status);
1291 cleaned = true;
1292 buffer_info = &tx_ring->buffer_info[i];
1293 skb = buffer_info->skb;
1294
1295 if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_ABT)) {
1296 adapter->stats.tx_aborted_errors++;
1297 pr_err("Transfer Abort Error\n");
1298 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CRSER)
1299 ) {
1300 adapter->stats.tx_carrier_errors++;
1301 pr_err("Transfer Carrier Sense Error\n");
1302 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_EXCOL)
1303 ) {
1304 adapter->stats.tx_aborted_errors++;
1305 pr_err("Transfer Collision Abort Error\n");
1306 } else if ((tx_desc->gbec_status &
1307 (PCH_GBE_TXD_GMAC_STAT_SNGCOL |
1308 PCH_GBE_TXD_GMAC_STAT_MLTCOL))) {
1309 adapter->stats.collisions++;
1310 adapter->stats.tx_packets++;
1311 adapter->stats.tx_bytes += skb->len;
1312 pr_debug("Transfer Collision\n");
1313 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CMPLT)
1314 ) {
1315 adapter->stats.tx_packets++;
1316 adapter->stats.tx_bytes += skb->len;
1317 }
1318 if (buffer_info->mapped) {
1319 pr_debug("unmap buffer_info->dma : %d\n", i);
1320 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1321 buffer_info->length, DMA_TO_DEVICE);
1322 buffer_info->mapped = false;
1323 }
1324 if (buffer_info->skb) {
1325 pr_debug("trim buffer_info->skb : %d\n", i);
1326 skb_trim(buffer_info->skb, 0);
1327 }
1328 tx_desc->gbec_status = DSC_INIT16;
1329 if (unlikely(++i == tx_ring->count))
1330 i = 0;
1331 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1332
1333 /* weight of a sort for tx, to avoid endless transmit cleanup */
1334 if (cleaned_count++ == PCH_GBE_TX_WEIGHT)
1335 break;
1336 }
1337 pr_debug("called pch_gbe_unmap_and_free_tx_resource() %d count\n",
1338 cleaned_count);
1339 /* Recover from running out of Tx resources in xmit_frame */
1340 if (unlikely(cleaned && (netif_queue_stopped(adapter->netdev)))) {
1341 netif_wake_queue(adapter->netdev);
1342 adapter->stats.tx_restart_count++;
1343 pr_debug("Tx wake queue\n");
1344 }
1345 spin_lock(&adapter->tx_queue_lock);
1346 tx_ring->next_to_clean = i;
1347 spin_unlock(&adapter->tx_queue_lock);
1348 pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean);
1349 return cleaned;
1350 }
1351
1352 /**
1353 * pch_gbe_clean_rx - Send received data up the network stack; legacy
1354 * @adapter: Board private structure
1355 * @rx_ring: Rx descriptor ring
1356 * @work_done: Completed count
1357 * @work_to_do: Request count
1358 * Returns
1359 * true: Cleaned the descriptor
1360 * false: Not cleaned the descriptor
1361 */
1362 static bool
1363 pch_gbe_clean_rx(struct pch_gbe_adapter *adapter,
1364 struct pch_gbe_rx_ring *rx_ring,
1365 int *work_done, int work_to_do)
1366 {
1367 struct net_device *netdev = adapter->netdev;
1368 struct pci_dev *pdev = adapter->pdev;
1369 struct pch_gbe_buffer *buffer_info;
1370 struct pch_gbe_rx_desc *rx_desc;
1371 u32 length;
1372 unsigned char tmp_packet[ETH_HLEN];
1373 unsigned int i;
1374 unsigned int cleaned_count = 0;
1375 bool cleaned = false;
1376 struct sk_buff *skb;
1377 u8 dma_status;
1378 u16 gbec_status;
1379 u32 tcp_ip_status;
1380 u8 skb_copy_flag = 0;
1381 u8 skb_padding_flag = 0;
1382
1383 i = rx_ring->next_to_clean;
1384
1385 while (*work_done < work_to_do) {
1386 /* Check Rx descriptor status */
1387 rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
1388 if (rx_desc->gbec_status == DSC_INIT16)
1389 break;
1390 cleaned = true;
1391 cleaned_count++;
1392
1393 dma_status = rx_desc->dma_status;
1394 gbec_status = rx_desc->gbec_status;
1395 tcp_ip_status = rx_desc->tcp_ip_status;
1396 rx_desc->gbec_status = DSC_INIT16;
1397 buffer_info = &rx_ring->buffer_info[i];
1398 skb = buffer_info->skb;
1399
1400 /* unmap dma */
1401 dma_unmap_single(&pdev->dev, buffer_info->dma,
1402 buffer_info->length, DMA_FROM_DEVICE);
1403 buffer_info->mapped = false;
1404 /* Prefetch the packet */
1405 prefetch(skb->data);
1406
1407 pr_debug("RxDecNo = 0x%04x Status[DMA:0x%02x GBE:0x%04x "
1408 "TCP:0x%08x] BufInf = 0x%p\n",
1409 i, dma_status, gbec_status, tcp_ip_status,
1410 buffer_info);
1411 /* Error check */
1412 if (unlikely(gbec_status & PCH_GBE_RXD_GMAC_STAT_NOTOCTAL)) {
1413 adapter->stats.rx_frame_errors++;
1414 pr_err("Receive Not Octal Error\n");
1415 } else if (unlikely(gbec_status &
1416 PCH_GBE_RXD_GMAC_STAT_NBLERR)) {
1417 adapter->stats.rx_frame_errors++;
1418 pr_err("Receive Nibble Error\n");
1419 } else if (unlikely(gbec_status &
1420 PCH_GBE_RXD_GMAC_STAT_CRCERR)) {
1421 adapter->stats.rx_crc_errors++;
1422 pr_err("Receive CRC Error\n");
1423 } else {
1424 /* get receive length */
1425 /* length convert[-3], padding[-2] */
1426 length = (rx_desc->rx_words_eob) - 3 - 2;
1427
1428 /* Decide the data conversion method */
1429 if (!adapter->rx_csum) {
1430 /* [Header:14][payload] */
1431 skb_padding_flag = 0;
1432 skb_copy_flag = 1;
1433 } else {
1434 /* [Header:14][padding:2][payload] */
1435 skb_padding_flag = 1;
1436 if (length < copybreak)
1437 skb_copy_flag = 1;
1438 else
1439 skb_copy_flag = 0;
1440 }
1441
1442 /* Data conversion */
1443 if (skb_copy_flag) { /* recycle skb */
1444 struct sk_buff *new_skb;
1445 new_skb =
1446 netdev_alloc_skb(netdev,
1447 length + NET_IP_ALIGN);
1448 if (new_skb) {
1449 if (!skb_padding_flag) {
1450 skb_reserve(new_skb,
1451 NET_IP_ALIGN);
1452 }
1453 memcpy(new_skb->data, skb->data,
1454 length);
1455 /* save the skb
1456 * in buffer_info as good */
1457 skb = new_skb;
1458 } else if (!skb_padding_flag) {
1459 /* dorrop error */
1460 pr_err("New skb allocation Error\n");
1461 goto dorrop;
1462 }
1463 } else {
1464 buffer_info->skb = NULL;
1465 }
1466 if (skb_padding_flag) {
1467 memcpy(&tmp_packet[0], &skb->data[0], ETH_HLEN);
1468 memcpy(&skb->data[NET_IP_ALIGN], &tmp_packet[0],
1469 ETH_HLEN);
1470 skb_reserve(skb, NET_IP_ALIGN);
1471
1472 }
1473
1474 /* update status of driver */
1475 adapter->stats.rx_bytes += length;
1476 adapter->stats.rx_packets++;
1477 if ((gbec_status & PCH_GBE_RXD_GMAC_STAT_MARMLT))
1478 adapter->stats.multicast++;
1479 /* Write meta date of skb */
1480 skb_put(skb, length);
1481 skb->protocol = eth_type_trans(skb, netdev);
1482 if ((tcp_ip_status & PCH_GBE_RXD_ACC_STAT_TCPIPOK) ==
1483 PCH_GBE_RXD_ACC_STAT_TCPIPOK) {
1484 skb->ip_summed = CHECKSUM_UNNECESSARY;
1485 } else {
1486 skb->ip_summed = CHECKSUM_NONE;
1487 }
1488 napi_gro_receive(&adapter->napi, skb);
1489 (*work_done)++;
1490 pr_debug("Receive skb->ip_summed: %d length: %d\n",
1491 skb->ip_summed, length);
1492 }
1493 dorrop:
1494 /* return some buffers to hardware, one at a time is too slow */
1495 if (unlikely(cleaned_count >= PCH_GBE_RX_BUFFER_WRITE)) {
1496 pch_gbe_alloc_rx_buffers(adapter, rx_ring,
1497 cleaned_count);
1498 cleaned_count = 0;
1499 }
1500 if (++i == rx_ring->count)
1501 i = 0;
1502 }
1503 rx_ring->next_to_clean = i;
1504 if (cleaned_count)
1505 pch_gbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
1506 return cleaned;
1507 }
1508
1509 /**
1510 * pch_gbe_setup_tx_resources - Allocate Tx resources (Descriptors)
1511 * @adapter: Board private structure
1512 * @tx_ring: Tx descriptor ring (for a specific queue) to setup
1513 * Returns
1514 * 0: Successfully
1515 * Negative value: Failed
1516 */
1517 int pch_gbe_setup_tx_resources(struct pch_gbe_adapter *adapter,
1518 struct pch_gbe_tx_ring *tx_ring)
1519 {
1520 struct pci_dev *pdev = adapter->pdev;
1521 struct pch_gbe_tx_desc *tx_desc;
1522 int size;
1523 int desNo;
1524
1525 size = (int)sizeof(struct pch_gbe_buffer) * tx_ring->count;
1526 tx_ring->buffer_info = vzalloc(size);
1527 if (!tx_ring->buffer_info) {
1528 pr_err("Unable to allocate memory for the buffer infomation\n");
1529 return -ENOMEM;
1530 }
1531
1532 tx_ring->size = tx_ring->count * (int)sizeof(struct pch_gbe_tx_desc);
1533
1534 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
1535 &tx_ring->dma, GFP_KERNEL);
1536 if (!tx_ring->desc) {
1537 vfree(tx_ring->buffer_info);
1538 pr_err("Unable to allocate memory for the transmit descriptor ring\n");
1539 return -ENOMEM;
1540 }
1541 memset(tx_ring->desc, 0, tx_ring->size);
1542
1543 tx_ring->next_to_use = 0;
1544 tx_ring->next_to_clean = 0;
1545 spin_lock_init(&tx_ring->tx_lock);
1546
1547 for (desNo = 0; desNo < tx_ring->count; desNo++) {
1548 tx_desc = PCH_GBE_TX_DESC(*tx_ring, desNo);
1549 tx_desc->gbec_status = DSC_INIT16;
1550 }
1551 pr_debug("tx_ring->desc = 0x%p tx_ring->dma = 0x%08llx\n"
1552 "next_to_clean = 0x%08x next_to_use = 0x%08x\n",
1553 tx_ring->desc, (unsigned long long)tx_ring->dma,
1554 tx_ring->next_to_clean, tx_ring->next_to_use);
1555 return 0;
1556 }
1557
1558 /**
1559 * pch_gbe_setup_rx_resources - Allocate Rx resources (Descriptors)
1560 * @adapter: Board private structure
1561 * @rx_ring: Rx descriptor ring (for a specific queue) to setup
1562 * Returns
1563 * 0: Successfully
1564 * Negative value: Failed
1565 */
1566 int pch_gbe_setup_rx_resources(struct pch_gbe_adapter *adapter,
1567 struct pch_gbe_rx_ring *rx_ring)
1568 {
1569 struct pci_dev *pdev = adapter->pdev;
1570 struct pch_gbe_rx_desc *rx_desc;
1571 int size;
1572 int desNo;
1573
1574 size = (int)sizeof(struct pch_gbe_buffer) * rx_ring->count;
1575 rx_ring->buffer_info = vzalloc(size);
1576 if (!rx_ring->buffer_info) {
1577 pr_err("Unable to allocate memory for the receive descriptor ring\n");
1578 return -ENOMEM;
1579 }
1580 rx_ring->size = rx_ring->count * (int)sizeof(struct pch_gbe_rx_desc);
1581 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
1582 &rx_ring->dma, GFP_KERNEL);
1583
1584 if (!rx_ring->desc) {
1585 pr_err("Unable to allocate memory for the receive descriptor ring\n");
1586 vfree(rx_ring->buffer_info);
1587 return -ENOMEM;
1588 }
1589 memset(rx_ring->desc, 0, rx_ring->size);
1590 rx_ring->next_to_clean = 0;
1591 rx_ring->next_to_use = 0;
1592 for (desNo = 0; desNo < rx_ring->count; desNo++) {
1593 rx_desc = PCH_GBE_RX_DESC(*rx_ring, desNo);
1594 rx_desc->gbec_status = DSC_INIT16;
1595 }
1596 pr_debug("rx_ring->desc = 0x%p rx_ring->dma = 0x%08llx "
1597 "next_to_clean = 0x%08x next_to_use = 0x%08x\n",
1598 rx_ring->desc, (unsigned long long)rx_ring->dma,
1599 rx_ring->next_to_clean, rx_ring->next_to_use);
1600 return 0;
1601 }
1602
1603 /**
1604 * pch_gbe_free_tx_resources - Free Tx Resources
1605 * @adapter: Board private structure
1606 * @tx_ring: Tx descriptor ring for a specific queue
1607 */
1608 void pch_gbe_free_tx_resources(struct pch_gbe_adapter *adapter,
1609 struct pch_gbe_tx_ring *tx_ring)
1610 {
1611 struct pci_dev *pdev = adapter->pdev;
1612
1613 pch_gbe_clean_tx_ring(adapter, tx_ring);
1614 vfree(tx_ring->buffer_info);
1615 tx_ring->buffer_info = NULL;
1616 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
1617 tx_ring->desc = NULL;
1618 }
1619
1620 /**
1621 * pch_gbe_free_rx_resources - Free Rx Resources
1622 * @adapter: Board private structure
1623 * @rx_ring: Ring to clean the resources from
1624 */
1625 void pch_gbe_free_rx_resources(struct pch_gbe_adapter *adapter,
1626 struct pch_gbe_rx_ring *rx_ring)
1627 {
1628 struct pci_dev *pdev = adapter->pdev;
1629
1630 pch_gbe_clean_rx_ring(adapter, rx_ring);
1631 vfree(rx_ring->buffer_info);
1632 rx_ring->buffer_info = NULL;
1633 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
1634 rx_ring->desc = NULL;
1635 }
1636
1637 /**
1638 * pch_gbe_request_irq - Allocate an interrupt line
1639 * @adapter: Board private structure
1640 * Returns
1641 * 0: Successfully
1642 * Negative value: Failed
1643 */
1644 static int pch_gbe_request_irq(struct pch_gbe_adapter *adapter)
1645 {
1646 struct net_device *netdev = adapter->netdev;
1647 int err;
1648 int flags;
1649
1650 flags = IRQF_SHARED;
1651 adapter->have_msi = false;
1652 err = pci_enable_msi(adapter->pdev);
1653 pr_debug("call pci_enable_msi\n");
1654 if (err) {
1655 pr_debug("call pci_enable_msi - Error: %d\n", err);
1656 } else {
1657 flags = 0;
1658 adapter->have_msi = true;
1659 }
1660 err = request_irq(adapter->pdev->irq, &pch_gbe_intr,
1661 flags, netdev->name, netdev);
1662 if (err)
1663 pr_err("Unable to allocate interrupt Error: %d\n", err);
1664 pr_debug("adapter->have_msi : %d flags : 0x%04x return : 0x%04x\n",
1665 adapter->have_msi, flags, err);
1666 return err;
1667 }
1668
1669
1670 static void pch_gbe_set_multi(struct net_device *netdev);
1671 /**
1672 * pch_gbe_up - Up GbE network device
1673 * @adapter: Board private structure
1674 * Returns
1675 * 0: Successfully
1676 * Negative value: Failed
1677 */
1678 int pch_gbe_up(struct pch_gbe_adapter *adapter)
1679 {
1680 struct net_device *netdev = adapter->netdev;
1681 struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
1682 struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
1683 int err;
1684
1685 /* hardware has been reset, we need to reload some things */
1686 pch_gbe_set_multi(netdev);
1687
1688 pch_gbe_setup_tctl(adapter);
1689 pch_gbe_configure_tx(adapter);
1690 pch_gbe_setup_rctl(adapter);
1691 pch_gbe_configure_rx(adapter);
1692
1693 err = pch_gbe_request_irq(adapter);
1694 if (err) {
1695 pr_err("Error: can't bring device up\n");
1696 return err;
1697 }
1698 pch_gbe_alloc_tx_buffers(adapter, tx_ring);
1699 pch_gbe_alloc_rx_buffers(adapter, rx_ring, rx_ring->count);
1700 adapter->tx_queue_len = netdev->tx_queue_len;
1701
1702 mod_timer(&adapter->watchdog_timer, jiffies);
1703
1704 napi_enable(&adapter->napi);
1705 pch_gbe_irq_enable(adapter);
1706 netif_start_queue(adapter->netdev);
1707
1708 return 0;
1709 }
1710
1711 /**
1712 * pch_gbe_down - Down GbE network device
1713 * @adapter: Board private structure
1714 */
1715 void pch_gbe_down(struct pch_gbe_adapter *adapter)
1716 {
1717 struct net_device *netdev = adapter->netdev;
1718
1719 /* signal that we're down so the interrupt handler does not
1720 * reschedule our watchdog timer */
1721 napi_disable(&adapter->napi);
1722 atomic_set(&adapter->irq_sem, 0);
1723
1724 pch_gbe_irq_disable(adapter);
1725 pch_gbe_free_irq(adapter);
1726
1727 del_timer_sync(&adapter->watchdog_timer);
1728
1729 netdev->tx_queue_len = adapter->tx_queue_len;
1730 netif_carrier_off(netdev);
1731 netif_stop_queue(netdev);
1732
1733 pch_gbe_reset(adapter);
1734 pch_gbe_clean_tx_ring(adapter, adapter->tx_ring);
1735 pch_gbe_clean_rx_ring(adapter, adapter->rx_ring);
1736 }
1737
1738 /**
1739 * pch_gbe_sw_init - Initialize general software structures (struct pch_gbe_adapter)
1740 * @adapter: Board private structure to initialize
1741 * Returns
1742 * 0: Successfully
1743 * Negative value: Failed
1744 */
1745 static int pch_gbe_sw_init(struct pch_gbe_adapter *adapter)
1746 {
1747 struct pch_gbe_hw *hw = &adapter->hw;
1748 struct net_device *netdev = adapter->netdev;
1749
1750 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
1751 hw->mac.max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1752 hw->mac.min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1753
1754 /* Initialize the hardware-specific values */
1755 if (pch_gbe_hal_setup_init_funcs(hw)) {
1756 pr_err("Hardware Initialization Failure\n");
1757 return -EIO;
1758 }
1759 if (pch_gbe_alloc_queues(adapter)) {
1760 pr_err("Unable to allocate memory for queues\n");
1761 return -ENOMEM;
1762 }
1763 spin_lock_init(&adapter->hw.miim_lock);
1764 spin_lock_init(&adapter->tx_queue_lock);
1765 spin_lock_init(&adapter->stats_lock);
1766 spin_lock_init(&adapter->ethtool_lock);
1767 atomic_set(&adapter->irq_sem, 0);
1768 pch_gbe_irq_disable(adapter);
1769
1770 pch_gbe_init_stats(adapter);
1771
1772 pr_debug("rx_buffer_len : %d mac.min_frame_size : %d mac.max_frame_size : %d\n",
1773 (u32) adapter->rx_buffer_len,
1774 hw->mac.min_frame_size, hw->mac.max_frame_size);
1775 return 0;
1776 }
1777
1778 /**
1779 * pch_gbe_open - Called when a network interface is made active
1780 * @netdev: Network interface device structure
1781 * Returns
1782 * 0: Successfully
1783 * Negative value: Failed
1784 */
1785 static int pch_gbe_open(struct net_device *netdev)
1786 {
1787 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1788 struct pch_gbe_hw *hw = &adapter->hw;
1789 int err;
1790
1791 /* allocate transmit descriptors */
1792 err = pch_gbe_setup_tx_resources(adapter, adapter->tx_ring);
1793 if (err)
1794 goto err_setup_tx;
1795 /* allocate receive descriptors */
1796 err = pch_gbe_setup_rx_resources(adapter, adapter->rx_ring);
1797 if (err)
1798 goto err_setup_rx;
1799 pch_gbe_hal_power_up_phy(hw);
1800 err = pch_gbe_up(adapter);
1801 if (err)
1802 goto err_up;
1803 pr_debug("Success End\n");
1804 return 0;
1805
1806 err_up:
1807 if (!adapter->wake_up_evt)
1808 pch_gbe_hal_power_down_phy(hw);
1809 pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
1810 err_setup_rx:
1811 pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
1812 err_setup_tx:
1813 pch_gbe_reset(adapter);
1814 pr_err("Error End\n");
1815 return err;
1816 }
1817
1818 /**
1819 * pch_gbe_stop - Disables a network interface
1820 * @netdev: Network interface device structure
1821 * Returns
1822 * 0: Successfully
1823 */
1824 static int pch_gbe_stop(struct net_device *netdev)
1825 {
1826 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1827 struct pch_gbe_hw *hw = &adapter->hw;
1828
1829 pch_gbe_down(adapter);
1830 if (!adapter->wake_up_evt)
1831 pch_gbe_hal_power_down_phy(hw);
1832 pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
1833 pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
1834 return 0;
1835 }
1836
1837 /**
1838 * pch_gbe_xmit_frame - Packet transmitting start
1839 * @skb: Socket buffer structure
1840 * @netdev: Network interface device structure
1841 * Returns
1842 * - NETDEV_TX_OK: Normal end
1843 * - NETDEV_TX_BUSY: Error end
1844 */
1845 static int pch_gbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1846 {
1847 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1848 struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
1849 unsigned long flags;
1850
1851 if (unlikely(skb->len > (adapter->hw.mac.max_frame_size - 4))) {
1852 pr_err("Transfer length Error: skb len: %d > max: %d\n",
1853 skb->len, adapter->hw.mac.max_frame_size);
1854 dev_kfree_skb_any(skb);
1855 adapter->stats.tx_length_errors++;
1856 return NETDEV_TX_OK;
1857 }
1858 if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags)) {
1859 /* Collision - tell upper layer to requeue */
1860 return NETDEV_TX_LOCKED;
1861 }
1862 if (unlikely(!PCH_GBE_DESC_UNUSED(tx_ring))) {
1863 netif_stop_queue(netdev);
1864 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1865 pr_debug("Return : BUSY next_to use : 0x%08x next_to clean : 0x%08x\n",
1866 tx_ring->next_to_use, tx_ring->next_to_clean);
1867 return NETDEV_TX_BUSY;
1868 }
1869 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1870
1871 /* CRC,ITAG no support */
1872 pch_gbe_tx_queue(adapter, tx_ring, skb);
1873 return NETDEV_TX_OK;
1874 }
1875
1876 /**
1877 * pch_gbe_get_stats - Get System Network Statistics
1878 * @netdev: Network interface device structure
1879 * Returns: The current stats
1880 */
1881 static struct net_device_stats *pch_gbe_get_stats(struct net_device *netdev)
1882 {
1883 /* only return the current stats */
1884 return &netdev->stats;
1885 }
1886
1887 /**
1888 * pch_gbe_set_multi - Multicast and Promiscuous mode set
1889 * @netdev: Network interface device structure
1890 */
1891 static void pch_gbe_set_multi(struct net_device *netdev)
1892 {
1893 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1894 struct pch_gbe_hw *hw = &adapter->hw;
1895 struct netdev_hw_addr *ha;
1896 u8 *mta_list;
1897 u32 rctl;
1898 int i;
1899 int mc_count;
1900
1901 pr_debug("netdev->flags : 0x%08x\n", netdev->flags);
1902
1903 /* Check for Promiscuous and All Multicast modes */
1904 rctl = ioread32(&hw->reg->RX_MODE);
1905 mc_count = netdev_mc_count(netdev);
1906 if ((netdev->flags & IFF_PROMISC)) {
1907 rctl &= ~PCH_GBE_ADD_FIL_EN;
1908 rctl &= ~PCH_GBE_MLT_FIL_EN;
1909 } else if ((netdev->flags & IFF_ALLMULTI)) {
1910 /* all the multicasting receive permissions */
1911 rctl |= PCH_GBE_ADD_FIL_EN;
1912 rctl &= ~PCH_GBE_MLT_FIL_EN;
1913 } else {
1914 if (mc_count >= PCH_GBE_MAR_ENTRIES) {
1915 /* all the multicasting receive permissions */
1916 rctl |= PCH_GBE_ADD_FIL_EN;
1917 rctl &= ~PCH_GBE_MLT_FIL_EN;
1918 } else {
1919 rctl |= (PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN);
1920 }
1921 }
1922 iowrite32(rctl, &hw->reg->RX_MODE);
1923
1924 if (mc_count >= PCH_GBE_MAR_ENTRIES)
1925 return;
1926 mta_list = kmalloc(mc_count * ETH_ALEN, GFP_ATOMIC);
1927 if (!mta_list)
1928 return;
1929
1930 /* The shared function expects a packed array of only addresses. */
1931 i = 0;
1932 netdev_for_each_mc_addr(ha, netdev) {
1933 if (i == mc_count)
1934 break;
1935 memcpy(mta_list + (i++ * ETH_ALEN), &ha->addr, ETH_ALEN);
1936 }
1937 pch_gbe_mac_mc_addr_list_update(hw, mta_list, i, 1,
1938 PCH_GBE_MAR_ENTRIES);
1939 kfree(mta_list);
1940
1941 pr_debug("RX_MODE reg(check bit31,30 ADD,MLT) : 0x%08x netdev->mc_count : 0x%08x\n",
1942 ioread32(&hw->reg->RX_MODE), mc_count);
1943 }
1944
1945 /**
1946 * pch_gbe_set_mac - Change the Ethernet Address of the NIC
1947 * @netdev: Network interface device structure
1948 * @addr: Pointer to an address structure
1949 * Returns
1950 * 0: Successfully
1951 * -EADDRNOTAVAIL: Failed
1952 */
1953 static int pch_gbe_set_mac(struct net_device *netdev, void *addr)
1954 {
1955 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1956 struct sockaddr *skaddr = addr;
1957 int ret_val;
1958
1959 if (!is_valid_ether_addr(skaddr->sa_data)) {
1960 ret_val = -EADDRNOTAVAIL;
1961 } else {
1962 memcpy(netdev->dev_addr, skaddr->sa_data, netdev->addr_len);
1963 memcpy(adapter->hw.mac.addr, skaddr->sa_data, netdev->addr_len);
1964 pch_gbe_mac_mar_set(&adapter->hw, adapter->hw.mac.addr, 0);
1965 ret_val = 0;
1966 }
1967 pr_debug("ret_val : 0x%08x\n", ret_val);
1968 pr_debug("dev_addr : %pM\n", netdev->dev_addr);
1969 pr_debug("mac_addr : %pM\n", adapter->hw.mac.addr);
1970 pr_debug("MAC_ADR1AB reg : 0x%08x 0x%08x\n",
1971 ioread32(&adapter->hw.reg->mac_adr[0].high),
1972 ioread32(&adapter->hw.reg->mac_adr[0].low));
1973 return ret_val;
1974 }
1975
1976 /**
1977 * pch_gbe_change_mtu - Change the Maximum Transfer Unit
1978 * @netdev: Network interface device structure
1979 * @new_mtu: New value for maximum frame size
1980 * Returns
1981 * 0: Successfully
1982 * -EINVAL: Failed
1983 */
1984 static int pch_gbe_change_mtu(struct net_device *netdev, int new_mtu)
1985 {
1986 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1987 int max_frame;
1988
1989 max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1990 if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
1991 (max_frame > PCH_GBE_MAX_JUMBO_FRAME_SIZE)) {
1992 pr_err("Invalid MTU setting\n");
1993 return -EINVAL;
1994 }
1995 if (max_frame <= PCH_GBE_FRAME_SIZE_2048)
1996 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
1997 else if (max_frame <= PCH_GBE_FRAME_SIZE_4096)
1998 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_4096;
1999 else if (max_frame <= PCH_GBE_FRAME_SIZE_8192)
2000 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_8192;
2001 else
2002 adapter->rx_buffer_len = PCH_GBE_MAX_JUMBO_FRAME_SIZE;
2003 netdev->mtu = new_mtu;
2004 adapter->hw.mac.max_frame_size = max_frame;
2005
2006 if (netif_running(netdev))
2007 pch_gbe_reinit_locked(adapter);
2008 else
2009 pch_gbe_reset(adapter);
2010
2011 pr_debug("max_frame : %d rx_buffer_len : %d mtu : %d max_frame_size : %d\n",
2012 max_frame, (u32) adapter->rx_buffer_len, netdev->mtu,
2013 adapter->hw.mac.max_frame_size);
2014 return 0;
2015 }
2016
2017 /**
2018 * pch_gbe_ioctl - Controls register through a MII interface
2019 * @netdev: Network interface device structure
2020 * @ifr: Pointer to ifr structure
2021 * @cmd: Control command
2022 * Returns
2023 * 0: Successfully
2024 * Negative value: Failed
2025 */
2026 static int pch_gbe_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2027 {
2028 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2029
2030 pr_debug("cmd : 0x%04x\n", cmd);
2031
2032 return generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
2033 }
2034
2035 /**
2036 * pch_gbe_tx_timeout - Respond to a Tx Hang
2037 * @netdev: Network interface device structure
2038 */
2039 static void pch_gbe_tx_timeout(struct net_device *netdev)
2040 {
2041 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2042
2043 /* Do the reset outside of interrupt context */
2044 adapter->stats.tx_timeout_count++;
2045 schedule_work(&adapter->reset_task);
2046 }
2047
2048 /**
2049 * pch_gbe_napi_poll - NAPI receive and transfer polling callback
2050 * @napi: Pointer of polling device struct
2051 * @budget: The maximum number of a packet
2052 * Returns
2053 * false: Exit the polling mode
2054 * true: Continue the polling mode
2055 */
2056 static int pch_gbe_napi_poll(struct napi_struct *napi, int budget)
2057 {
2058 struct pch_gbe_adapter *adapter =
2059 container_of(napi, struct pch_gbe_adapter, napi);
2060 struct net_device *netdev = adapter->netdev;
2061 int work_done = 0;
2062 bool poll_end_flag = false;
2063 bool cleaned = false;
2064
2065 pr_debug("budget : %d\n", budget);
2066
2067 /* Keep link state information with original netdev */
2068 if (!netif_carrier_ok(netdev)) {
2069 poll_end_flag = true;
2070 } else {
2071 cleaned = pch_gbe_clean_tx(adapter, adapter->tx_ring);
2072 pch_gbe_clean_rx(adapter, adapter->rx_ring, &work_done, budget);
2073
2074 if (cleaned)
2075 work_done = budget;
2076 /* If no Tx and not enough Rx work done,
2077 * exit the polling mode
2078 */
2079 if ((work_done < budget) || !netif_running(netdev))
2080 poll_end_flag = true;
2081 }
2082
2083 if (poll_end_flag) {
2084 napi_complete(napi);
2085 pch_gbe_irq_enable(adapter);
2086 }
2087
2088 pr_debug("poll_end_flag : %d work_done : %d budget : %d\n",
2089 poll_end_flag, work_done, budget);
2090
2091 return work_done;
2092 }
2093
2094 #ifdef CONFIG_NET_POLL_CONTROLLER
2095 /**
2096 * pch_gbe_netpoll - Used by things like netconsole to send skbs
2097 * @netdev: Network interface device structure
2098 */
2099 static void pch_gbe_netpoll(struct net_device *netdev)
2100 {
2101 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2102
2103 disable_irq(adapter->pdev->irq);
2104 pch_gbe_intr(adapter->pdev->irq, netdev);
2105 enable_irq(adapter->pdev->irq);
2106 }
2107 #endif
2108
2109 static const struct net_device_ops pch_gbe_netdev_ops = {
2110 .ndo_open = pch_gbe_open,
2111 .ndo_stop = pch_gbe_stop,
2112 .ndo_start_xmit = pch_gbe_xmit_frame,
2113 .ndo_get_stats = pch_gbe_get_stats,
2114 .ndo_set_mac_address = pch_gbe_set_mac,
2115 .ndo_tx_timeout = pch_gbe_tx_timeout,
2116 .ndo_change_mtu = pch_gbe_change_mtu,
2117 .ndo_do_ioctl = pch_gbe_ioctl,
2118 .ndo_set_multicast_list = &pch_gbe_set_multi,
2119 #ifdef CONFIG_NET_POLL_CONTROLLER
2120 .ndo_poll_controller = pch_gbe_netpoll,
2121 #endif
2122 };
2123
2124 static pci_ers_result_t pch_gbe_io_error_detected(struct pci_dev *pdev,
2125 pci_channel_state_t state)
2126 {
2127 struct net_device *netdev = pci_get_drvdata(pdev);
2128 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2129
2130 netif_device_detach(netdev);
2131 if (netif_running(netdev))
2132 pch_gbe_down(adapter);
2133 pci_disable_device(pdev);
2134 /* Request a slot slot reset. */
2135 return PCI_ERS_RESULT_NEED_RESET;
2136 }
2137
2138 static pci_ers_result_t pch_gbe_io_slot_reset(struct pci_dev *pdev)
2139 {
2140 struct net_device *netdev = pci_get_drvdata(pdev);
2141 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2142 struct pch_gbe_hw *hw = &adapter->hw;
2143
2144 if (pci_enable_device(pdev)) {
2145 pr_err("Cannot re-enable PCI device after reset\n");
2146 return PCI_ERS_RESULT_DISCONNECT;
2147 }
2148 pci_set_master(pdev);
2149 pci_enable_wake(pdev, PCI_D0, 0);
2150 pch_gbe_hal_power_up_phy(hw);
2151 pch_gbe_reset(adapter);
2152 /* Clear wake up status */
2153 pch_gbe_mac_set_wol_event(hw, 0);
2154
2155 return PCI_ERS_RESULT_RECOVERED;
2156 }
2157
2158 static void pch_gbe_io_resume(struct pci_dev *pdev)
2159 {
2160 struct net_device *netdev = pci_get_drvdata(pdev);
2161 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2162
2163 if (netif_running(netdev)) {
2164 if (pch_gbe_up(adapter)) {
2165 pr_debug("can't bring device back up after reset\n");
2166 return;
2167 }
2168 }
2169 netif_device_attach(netdev);
2170 }
2171
2172 static int __pch_gbe_suspend(struct pci_dev *pdev)
2173 {
2174 struct net_device *netdev = pci_get_drvdata(pdev);
2175 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2176 struct pch_gbe_hw *hw = &adapter->hw;
2177 u32 wufc = adapter->wake_up_evt;
2178 int retval = 0;
2179
2180 netif_device_detach(netdev);
2181 if (netif_running(netdev))
2182 pch_gbe_down(adapter);
2183 if (wufc) {
2184 pch_gbe_set_multi(netdev);
2185 pch_gbe_setup_rctl(adapter);
2186 pch_gbe_configure_rx(adapter);
2187 pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
2188 hw->mac.link_duplex);
2189 pch_gbe_set_mode(adapter, hw->mac.link_speed,
2190 hw->mac.link_duplex);
2191 pch_gbe_mac_set_wol_event(hw, wufc);
2192 pci_disable_device(pdev);
2193 } else {
2194 pch_gbe_hal_power_down_phy(hw);
2195 pch_gbe_mac_set_wol_event(hw, wufc);
2196 pci_disable_device(pdev);
2197 }
2198 return retval;
2199 }
2200
2201 #ifdef CONFIG_PM
2202 static int pch_gbe_suspend(struct device *device)
2203 {
2204 struct pci_dev *pdev = to_pci_dev(device);
2205
2206 return __pch_gbe_suspend(pdev);
2207 }
2208
2209 static int pch_gbe_resume(struct device *device)
2210 {
2211 struct pci_dev *pdev = to_pci_dev(device);
2212 struct net_device *netdev = pci_get_drvdata(pdev);
2213 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2214 struct pch_gbe_hw *hw = &adapter->hw;
2215 u32 err;
2216
2217 err = pci_enable_device(pdev);
2218 if (err) {
2219 pr_err("Cannot enable PCI device from suspend\n");
2220 return err;
2221 }
2222 pci_set_master(pdev);
2223 pch_gbe_hal_power_up_phy(hw);
2224 pch_gbe_reset(adapter);
2225 /* Clear wake on lan control and status */
2226 pch_gbe_mac_set_wol_event(hw, 0);
2227
2228 if (netif_running(netdev))
2229 pch_gbe_up(adapter);
2230 netif_device_attach(netdev);
2231
2232 return 0;
2233 }
2234 #endif /* CONFIG_PM */
2235
2236 static void pch_gbe_shutdown(struct pci_dev *pdev)
2237 {
2238 __pch_gbe_suspend(pdev);
2239 if (system_state == SYSTEM_POWER_OFF) {
2240 pci_wake_from_d3(pdev, true);
2241 pci_set_power_state(pdev, PCI_D3hot);
2242 }
2243 }
2244
2245 static void pch_gbe_remove(struct pci_dev *pdev)
2246 {
2247 struct net_device *netdev = pci_get_drvdata(pdev);
2248 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2249
2250 flush_scheduled_work();
2251 unregister_netdev(netdev);
2252
2253 pch_gbe_hal_phy_hw_reset(&adapter->hw);
2254
2255 kfree(adapter->tx_ring);
2256 kfree(adapter->rx_ring);
2257
2258 iounmap(adapter->hw.reg);
2259 pci_release_regions(pdev);
2260 free_netdev(netdev);
2261 pci_disable_device(pdev);
2262 }
2263
2264 static int pch_gbe_probe(struct pci_dev *pdev,
2265 const struct pci_device_id *pci_id)
2266 {
2267 struct net_device *netdev;
2268 struct pch_gbe_adapter *adapter;
2269 int ret;
2270
2271 ret = pci_enable_device(pdev);
2272 if (ret)
2273 return ret;
2274
2275 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
2276 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
2277 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2278 if (ret) {
2279 ret = pci_set_consistent_dma_mask(pdev,
2280 DMA_BIT_MASK(32));
2281 if (ret) {
2282 dev_err(&pdev->dev, "ERR: No usable DMA "
2283 "configuration, aborting\n");
2284 goto err_disable_device;
2285 }
2286 }
2287 }
2288
2289 ret = pci_request_regions(pdev, KBUILD_MODNAME);
2290 if (ret) {
2291 dev_err(&pdev->dev,
2292 "ERR: Can't reserve PCI I/O and memory resources\n");
2293 goto err_disable_device;
2294 }
2295 pci_set_master(pdev);
2296
2297 netdev = alloc_etherdev((int)sizeof(struct pch_gbe_adapter));
2298 if (!netdev) {
2299 ret = -ENOMEM;
2300 dev_err(&pdev->dev,
2301 "ERR: Can't allocate and set up an Ethernet device\n");
2302 goto err_release_pci;
2303 }
2304 SET_NETDEV_DEV(netdev, &pdev->dev);
2305
2306 pci_set_drvdata(pdev, netdev);
2307 adapter = netdev_priv(netdev);
2308 adapter->netdev = netdev;
2309 adapter->pdev = pdev;
2310 adapter->hw.back = adapter;
2311 adapter->hw.reg = pci_iomap(pdev, PCH_GBE_PCI_BAR, 0);
2312 if (!adapter->hw.reg) {
2313 ret = -EIO;
2314 dev_err(&pdev->dev, "Can't ioremap\n");
2315 goto err_free_netdev;
2316 }
2317
2318 netdev->netdev_ops = &pch_gbe_netdev_ops;
2319 netdev->watchdog_timeo = PCH_GBE_WATCHDOG_PERIOD;
2320 netif_napi_add(netdev, &adapter->napi,
2321 pch_gbe_napi_poll, PCH_GBE_RX_WEIGHT);
2322 netdev->features = NETIF_F_HW_CSUM | NETIF_F_GRO;
2323 pch_gbe_set_ethtool_ops(netdev);
2324
2325 pch_gbe_mac_reset_hw(&adapter->hw);
2326
2327 /* setup the private structure */
2328 ret = pch_gbe_sw_init(adapter);
2329 if (ret)
2330 goto err_iounmap;
2331
2332 /* Initialize PHY */
2333 ret = pch_gbe_init_phy(adapter);
2334 if (ret) {
2335 dev_err(&pdev->dev, "PHY initialize error\n");
2336 goto err_free_adapter;
2337 }
2338 pch_gbe_hal_get_bus_info(&adapter->hw);
2339
2340 /* Read the MAC address. and store to the private data */
2341 ret = pch_gbe_hal_read_mac_addr(&adapter->hw);
2342 if (ret) {
2343 dev_err(&pdev->dev, "MAC address Read Error\n");
2344 goto err_free_adapter;
2345 }
2346
2347 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2348 if (!is_valid_ether_addr(netdev->dev_addr)) {
2349 dev_err(&pdev->dev, "Invalid MAC Address\n");
2350 ret = -EIO;
2351 goto err_free_adapter;
2352 }
2353 setup_timer(&adapter->watchdog_timer, pch_gbe_watchdog,
2354 (unsigned long)adapter);
2355
2356 INIT_WORK(&adapter->reset_task, pch_gbe_reset_task);
2357
2358 pch_gbe_check_options(adapter);
2359
2360 if (adapter->tx_csum)
2361 netdev->features |= NETIF_F_HW_CSUM;
2362 else
2363 netdev->features &= ~NETIF_F_HW_CSUM;
2364
2365 /* initialize the wol settings based on the eeprom settings */
2366 adapter->wake_up_evt = PCH_GBE_WL_INIT_SETTING;
2367 dev_info(&pdev->dev, "MAC address : %pM\n", netdev->dev_addr);
2368
2369 /* reset the hardware with the new settings */
2370 pch_gbe_reset(adapter);
2371
2372 ret = register_netdev(netdev);
2373 if (ret)
2374 goto err_free_adapter;
2375 /* tell the stack to leave us alone until pch_gbe_open() is called */
2376 netif_carrier_off(netdev);
2377 netif_stop_queue(netdev);
2378
2379 dev_dbg(&pdev->dev, "OKIsemi(R) PCH Network Connection\n");
2380
2381 device_set_wakeup_enable(&pdev->dev, 1);
2382 return 0;
2383
2384 err_free_adapter:
2385 pch_gbe_hal_phy_hw_reset(&adapter->hw);
2386 kfree(adapter->tx_ring);
2387 kfree(adapter->rx_ring);
2388 err_iounmap:
2389 iounmap(adapter->hw.reg);
2390 err_free_netdev:
2391 free_netdev(netdev);
2392 err_release_pci:
2393 pci_release_regions(pdev);
2394 err_disable_device:
2395 pci_disable_device(pdev);
2396 return ret;
2397 }
2398
2399 static DEFINE_PCI_DEVICE_TABLE(pch_gbe_pcidev_id) = {
2400 {.vendor = PCI_VENDOR_ID_INTEL,
2401 .device = PCI_DEVICE_ID_INTEL_IOH1_GBE,
2402 .subvendor = PCI_ANY_ID,
2403 .subdevice = PCI_ANY_ID,
2404 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2405 .class_mask = (0xFFFF00)
2406 },
2407 /* required last entry */
2408 {0}
2409 };
2410
2411 #ifdef CONFIG_PM
2412 static const struct dev_pm_ops pch_gbe_pm_ops = {
2413 .suspend = pch_gbe_suspend,
2414 .resume = pch_gbe_resume,
2415 .freeze = pch_gbe_suspend,
2416 .thaw = pch_gbe_resume,
2417 .poweroff = pch_gbe_suspend,
2418 .restore = pch_gbe_resume,
2419 };
2420 #endif
2421
2422 static struct pci_error_handlers pch_gbe_err_handler = {
2423 .error_detected = pch_gbe_io_error_detected,
2424 .slot_reset = pch_gbe_io_slot_reset,
2425 .resume = pch_gbe_io_resume
2426 };
2427
2428 static struct pci_driver pch_gbe_pcidev = {
2429 .name = KBUILD_MODNAME,
2430 .id_table = pch_gbe_pcidev_id,
2431 .probe = pch_gbe_probe,
2432 .remove = pch_gbe_remove,
2433 #ifdef CONFIG_PM_OPS
2434 .driver.pm = &pch_gbe_pm_ops,
2435 #endif
2436 .shutdown = pch_gbe_shutdown,
2437 .err_handler = &pch_gbe_err_handler
2438 };
2439
2440
2441 static int __init pch_gbe_init_module(void)
2442 {
2443 int ret;
2444
2445 ret = pci_register_driver(&pch_gbe_pcidev);
2446 if (copybreak != PCH_GBE_COPYBREAK_DEFAULT) {
2447 if (copybreak == 0) {
2448 pr_info("copybreak disabled\n");
2449 } else {
2450 pr_info("copybreak enabled for packets <= %u bytes\n",
2451 copybreak);
2452 }
2453 }
2454 return ret;
2455 }
2456
2457 static void __exit pch_gbe_exit_module(void)
2458 {
2459 pci_unregister_driver(&pch_gbe_pcidev);
2460 }
2461
2462 module_init(pch_gbe_init_module);
2463 module_exit(pch_gbe_exit_module);
2464
2465 MODULE_DESCRIPTION("OKI semiconductor PCH Gigabit ethernet Driver");
2466 MODULE_AUTHOR("OKI semiconductor, <masa-korg@dsn.okisemi.com>");
2467 MODULE_LICENSE("GPL");
2468 MODULE_VERSION(DRV_VERSION);
2469 MODULE_DEVICE_TABLE(pci, pch_gbe_pcidev_id);
2470
2471 module_param(copybreak, uint, 0644);
2472 MODULE_PARM_DESC(copybreak,
2473 "Maximum size of packet that is copied to a new buffer on receive");
2474
2475 /* pch_gbe_main.c */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree