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 #include <linux/module.h>
24
25 #define DRV_VERSION "1.00"
26 const char pch_driver_version[] = DRV_VERSION;
27
28 #define PCI_DEVICE_ID_INTEL_IOH1_GBE 0x8802 /* Pci device ID */
29 #define PCH_GBE_MAR_ENTRIES 16
30 #define PCH_GBE_SHORT_PKT 64
31 #define DSC_INIT16 0xC000
32 #define PCH_GBE_DMA_ALIGN 0
33 #define PCH_GBE_DMA_PADDING 2
34 #define PCH_GBE_WATCHDOG_PERIOD (1 * HZ) /* watchdog time */
35 #define PCH_GBE_COPYBREAK_DEFAULT 256
36 #define PCH_GBE_PCI_BAR 1
37 #define PCH_GBE_RESERVE_MEMORY 0x200000 /* 2MB */
38
39 /* Macros for ML7223 */
40 #define PCI_VENDOR_ID_ROHM 0x10db
41 #define PCI_DEVICE_ID_ROHM_ML7223_GBE 0x8013
42
43 /* Macros for ML7831 */
44 #define PCI_DEVICE_ID_ROHM_ML7831_GBE 0x8802
45
46 #define PCH_GBE_TX_WEIGHT 64
47 #define PCH_GBE_RX_WEIGHT 64
48 #define PCH_GBE_RX_BUFFER_WRITE 16
49
50 /* Initialize the wake-on-LAN settings */
51 #define PCH_GBE_WL_INIT_SETTING (PCH_GBE_WLC_MP)
52
53 #define PCH_GBE_MAC_RGMII_CTRL_SETTING ( \
54 PCH_GBE_CHIP_TYPE_INTERNAL | \
55 PCH_GBE_RGMII_MODE_RGMII \
56 )
57
58 /* Ethertype field values */
59 #define PCH_GBE_MAX_RX_BUFFER_SIZE 0x2880
60 #define PCH_GBE_MAX_JUMBO_FRAME_SIZE 10318
61 #define PCH_GBE_FRAME_SIZE_2048 2048
62 #define PCH_GBE_FRAME_SIZE_4096 4096
63 #define PCH_GBE_FRAME_SIZE_8192 8192
64
65 #define PCH_GBE_GET_DESC(R, i, type) (&(((struct type *)((R).desc))[i]))
66 #define PCH_GBE_RX_DESC(R, i) PCH_GBE_GET_DESC(R, i, pch_gbe_rx_desc)
67 #define PCH_GBE_TX_DESC(R, i) PCH_GBE_GET_DESC(R, i, pch_gbe_tx_desc)
68 #define PCH_GBE_DESC_UNUSED(R) \
69 ((((R)->next_to_clean > (R)->next_to_use) ? 0 : (R)->count) + \
70 (R)->next_to_clean - (R)->next_to_use - 1)
71
72 /* Pause packet value */
73 #define PCH_GBE_PAUSE_PKT1_VALUE 0x00C28001
74 #define PCH_GBE_PAUSE_PKT2_VALUE 0x00000100
75 #define PCH_GBE_PAUSE_PKT4_VALUE 0x01000888
76 #define PCH_GBE_PAUSE_PKT5_VALUE 0x0000FFFF
77
78 #define PCH_GBE_ETH_ALEN 6
79
80 /* This defines the bits that are set in the Interrupt Mask
81 * Set/Read Register. Each bit is documented below:
82 * o RXT0 = Receiver Timer Interrupt (ring 0)
83 * o TXDW = Transmit Descriptor Written Back
84 * o RXDMT0 = Receive Descriptor Minimum Threshold hit (ring 0)
85 * o RXSEQ = Receive Sequence Error
86 * o LSC = Link Status Change
87 */
88 #define PCH_GBE_INT_ENABLE_MASK ( \
89 PCH_GBE_INT_RX_DMA_CMPLT | \
90 PCH_GBE_INT_RX_DSC_EMP | \
91 PCH_GBE_INT_RX_FIFO_ERR | \
92 PCH_GBE_INT_WOL_DET | \
93 PCH_GBE_INT_TX_CMPLT \
94 )
95
96 #define PCH_GBE_INT_DISABLE_ALL 0
97
98 static unsigned int copybreak __read_mostly = PCH_GBE_COPYBREAK_DEFAULT;
99
100 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg);
101 static void pch_gbe_mdio_write(struct net_device *netdev, int addr, int reg,
102 int data);
103
pch_gbe_mac_load_mac_addr(struct pch_gbe_hw * hw)104 inline void pch_gbe_mac_load_mac_addr(struct pch_gbe_hw *hw)
105 {
106 iowrite32(0x01, &hw->reg->MAC_ADDR_LOAD);
107 }
108
109 /**
110 * pch_gbe_mac_read_mac_addr - Read MAC address
111 * @hw: Pointer to the HW structure
112 * Returns
113 * 0: Successful.
114 */
pch_gbe_mac_read_mac_addr(struct pch_gbe_hw * hw)115 s32 pch_gbe_mac_read_mac_addr(struct pch_gbe_hw *hw)
116 {
117 u32 adr1a, adr1b;
118
119 adr1a = ioread32(&hw->reg->mac_adr[0].high);
120 adr1b = ioread32(&hw->reg->mac_adr[0].low);
121
122 hw->mac.addr[0] = (u8)(adr1a & 0xFF);
123 hw->mac.addr[1] = (u8)((adr1a >> 8) & 0xFF);
124 hw->mac.addr[2] = (u8)((adr1a >> 16) & 0xFF);
125 hw->mac.addr[3] = (u8)((adr1a >> 24) & 0xFF);
126 hw->mac.addr[4] = (u8)(adr1b & 0xFF);
127 hw->mac.addr[5] = (u8)((adr1b >> 8) & 0xFF);
128
129 pr_debug("hw->mac.addr : %pM\n", hw->mac.addr);
130 return 0;
131 }
132
133 /**
134 * pch_gbe_wait_clr_bit - Wait to clear a bit
135 * @reg: Pointer of register
136 * @busy: Busy bit
137 */
pch_gbe_wait_clr_bit(void * reg,u32 bit)138 static void pch_gbe_wait_clr_bit(void *reg, u32 bit)
139 {
140 u32 tmp;
141 /* wait busy */
142 tmp = 1000;
143 while ((ioread32(reg) & bit) && --tmp)
144 cpu_relax();
145 if (!tmp)
146 pr_err("Error: busy bit is not cleared\n");
147 }
148
149 /**
150 * pch_gbe_wait_clr_bit_irq - Wait to clear a bit for interrupt context
151 * @reg: Pointer of register
152 * @busy: Busy bit
153 */
pch_gbe_wait_clr_bit_irq(void * reg,u32 bit)154 static int pch_gbe_wait_clr_bit_irq(void *reg, u32 bit)
155 {
156 u32 tmp;
157 int ret = -1;
158 /* wait busy */
159 tmp = 20;
160 while ((ioread32(reg) & bit) && --tmp)
161 udelay(5);
162 if (!tmp)
163 pr_err("Error: busy bit is not cleared\n");
164 else
165 ret = 0;
166 return ret;
167 }
168
169 /**
170 * pch_gbe_mac_mar_set - Set MAC address register
171 * @hw: Pointer to the HW structure
172 * @addr: Pointer to the MAC address
173 * @index: MAC address array register
174 */
pch_gbe_mac_mar_set(struct pch_gbe_hw * hw,u8 * addr,u32 index)175 static void pch_gbe_mac_mar_set(struct pch_gbe_hw *hw, u8 * addr, u32 index)
176 {
177 u32 mar_low, mar_high, adrmask;
178
179 pr_debug("index : 0x%x\n", index);
180
181 /*
182 * HW expects these in little endian so we reverse the byte order
183 * from network order (big endian) to little endian
184 */
185 mar_high = ((u32) addr[0] | ((u32) addr[1] << 8) |
186 ((u32) addr[2] << 16) | ((u32) addr[3] << 24));
187 mar_low = ((u32) addr[4] | ((u32) addr[5] << 8));
188 /* Stop the MAC Address of index. */
189 adrmask = ioread32(&hw->reg->ADDR_MASK);
190 iowrite32((adrmask | (0x0001 << index)), &hw->reg->ADDR_MASK);
191 /* wait busy */
192 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
193 /* Set the MAC address to the MAC address 1A/1B register */
194 iowrite32(mar_high, &hw->reg->mac_adr[index].high);
195 iowrite32(mar_low, &hw->reg->mac_adr[index].low);
196 /* Start the MAC address of index */
197 iowrite32((adrmask & ~(0x0001 << index)), &hw->reg->ADDR_MASK);
198 /* wait busy */
199 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
200 }
201
202 /**
203 * pch_gbe_mac_reset_hw - Reset hardware
204 * @hw: Pointer to the HW structure
205 */
pch_gbe_mac_reset_hw(struct pch_gbe_hw * hw)206 static void pch_gbe_mac_reset_hw(struct pch_gbe_hw *hw)
207 {
208 /* Read the MAC address. and store to the private data */
209 pch_gbe_mac_read_mac_addr(hw);
210 iowrite32(PCH_GBE_ALL_RST, &hw->reg->RESET);
211 #ifdef PCH_GBE_MAC_IFOP_RGMII
212 iowrite32(PCH_GBE_MODE_GMII_ETHER, &hw->reg->MODE);
213 #endif
214 pch_gbe_wait_clr_bit(&hw->reg->RESET, PCH_GBE_ALL_RST);
215 /* Setup the receive address */
216 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
217 return;
218 }
219
pch_gbe_mac_reset_rx(struct pch_gbe_hw * hw)220 static void pch_gbe_mac_reset_rx(struct pch_gbe_hw *hw)
221 {
222 /* Read the MAC address. and store to the private data */
223 pch_gbe_mac_read_mac_addr(hw);
224 iowrite32(PCH_GBE_RX_RST, &hw->reg->RESET);
225 pch_gbe_wait_clr_bit_irq(&hw->reg->RESET, PCH_GBE_RX_RST);
226 /* Setup the MAC address */
227 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
228 return;
229 }
230
231 /**
232 * pch_gbe_mac_init_rx_addrs - Initialize receive address's
233 * @hw: Pointer to the HW structure
234 * @mar_count: Receive address registers
235 */
pch_gbe_mac_init_rx_addrs(struct pch_gbe_hw * hw,u16 mar_count)236 static void pch_gbe_mac_init_rx_addrs(struct pch_gbe_hw *hw, u16 mar_count)
237 {
238 u32 i;
239
240 /* Setup the receive address */
241 pch_gbe_mac_mar_set(hw, hw->mac.addr, 0);
242
243 /* Zero out the other receive addresses */
244 for (i = 1; i < mar_count; i++) {
245 iowrite32(0, &hw->reg->mac_adr[i].high);
246 iowrite32(0, &hw->reg->mac_adr[i].low);
247 }
248 iowrite32(0xFFFE, &hw->reg->ADDR_MASK);
249 /* wait busy */
250 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
251 }
252
253
254 /**
255 * pch_gbe_mac_mc_addr_list_update - Update Multicast addresses
256 * @hw: Pointer to the HW structure
257 * @mc_addr_list: Array of multicast addresses to program
258 * @mc_addr_count: Number of multicast addresses to program
259 * @mar_used_count: The first MAC Address register free to program
260 * @mar_total_num: Total number of supported MAC Address Registers
261 */
pch_gbe_mac_mc_addr_list_update(struct pch_gbe_hw * hw,u8 * mc_addr_list,u32 mc_addr_count,u32 mar_used_count,u32 mar_total_num)262 static void pch_gbe_mac_mc_addr_list_update(struct pch_gbe_hw *hw,
263 u8 *mc_addr_list, u32 mc_addr_count,
264 u32 mar_used_count, u32 mar_total_num)
265 {
266 u32 i, adrmask;
267
268 /* Load the first set of multicast addresses into the exact
269 * filters (RAR). If there are not enough to fill the RAR
270 * array, clear the filters.
271 */
272 for (i = mar_used_count; i < mar_total_num; i++) {
273 if (mc_addr_count) {
274 pch_gbe_mac_mar_set(hw, mc_addr_list, i);
275 mc_addr_count--;
276 mc_addr_list += PCH_GBE_ETH_ALEN;
277 } else {
278 /* Clear MAC address mask */
279 adrmask = ioread32(&hw->reg->ADDR_MASK);
280 iowrite32((adrmask | (0x0001 << i)),
281 &hw->reg->ADDR_MASK);
282 /* wait busy */
283 pch_gbe_wait_clr_bit(&hw->reg->ADDR_MASK, PCH_GBE_BUSY);
284 /* Clear MAC address */
285 iowrite32(0, &hw->reg->mac_adr[i].high);
286 iowrite32(0, &hw->reg->mac_adr[i].low);
287 }
288 }
289 }
290
291 /**
292 * pch_gbe_mac_force_mac_fc - Force the MAC's flow control settings
293 * @hw: Pointer to the HW structure
294 * Returns
295 * 0: Successful.
296 * Negative value: Failed.
297 */
pch_gbe_mac_force_mac_fc(struct pch_gbe_hw * hw)298 s32 pch_gbe_mac_force_mac_fc(struct pch_gbe_hw *hw)
299 {
300 struct pch_gbe_mac_info *mac = &hw->mac;
301 u32 rx_fctrl;
302
303 pr_debug("mac->fc = %u\n", mac->fc);
304
305 rx_fctrl = ioread32(&hw->reg->RX_FCTRL);
306
307 switch (mac->fc) {
308 case PCH_GBE_FC_NONE:
309 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
310 mac->tx_fc_enable = false;
311 break;
312 case PCH_GBE_FC_RX_PAUSE:
313 rx_fctrl |= PCH_GBE_FL_CTRL_EN;
314 mac->tx_fc_enable = false;
315 break;
316 case PCH_GBE_FC_TX_PAUSE:
317 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
318 mac->tx_fc_enable = true;
319 break;
320 case PCH_GBE_FC_FULL:
321 rx_fctrl |= PCH_GBE_FL_CTRL_EN;
322 mac->tx_fc_enable = true;
323 break;
324 default:
325 pr_err("Flow control param set incorrectly\n");
326 return -EINVAL;
327 }
328 if (mac->link_duplex == DUPLEX_HALF)
329 rx_fctrl &= ~PCH_GBE_FL_CTRL_EN;
330 iowrite32(rx_fctrl, &hw->reg->RX_FCTRL);
331 pr_debug("RX_FCTRL reg : 0x%08x mac->tx_fc_enable : %d\n",
332 ioread32(&hw->reg->RX_FCTRL), mac->tx_fc_enable);
333 return 0;
334 }
335
336 /**
337 * pch_gbe_mac_set_wol_event - Set wake-on-lan event
338 * @hw: Pointer to the HW structure
339 * @wu_evt: Wake up event
340 */
pch_gbe_mac_set_wol_event(struct pch_gbe_hw * hw,u32 wu_evt)341 static void pch_gbe_mac_set_wol_event(struct pch_gbe_hw *hw, u32 wu_evt)
342 {
343 u32 addr_mask;
344
345 pr_debug("wu_evt : 0x%08x ADDR_MASK reg : 0x%08x\n",
346 wu_evt, ioread32(&hw->reg->ADDR_MASK));
347
348 if (wu_evt) {
349 /* Set Wake-On-Lan address mask */
350 addr_mask = ioread32(&hw->reg->ADDR_MASK);
351 iowrite32(addr_mask, &hw->reg->WOL_ADDR_MASK);
352 /* wait busy */
353 pch_gbe_wait_clr_bit(&hw->reg->WOL_ADDR_MASK, PCH_GBE_WLA_BUSY);
354 iowrite32(0, &hw->reg->WOL_ST);
355 iowrite32((wu_evt | PCH_GBE_WLC_WOL_MODE), &hw->reg->WOL_CTRL);
356 iowrite32(0x02, &hw->reg->TCPIP_ACC);
357 iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
358 } else {
359 iowrite32(0, &hw->reg->WOL_CTRL);
360 iowrite32(0, &hw->reg->WOL_ST);
361 }
362 return;
363 }
364
365 /**
366 * pch_gbe_mac_ctrl_miim - Control MIIM interface
367 * @hw: Pointer to the HW structure
368 * @addr: Address of PHY
369 * @dir: Operetion. (Write or Read)
370 * @reg: Access register of PHY
371 * @data: Write data.
372 *
373 * Returns: Read date.
374 */
pch_gbe_mac_ctrl_miim(struct pch_gbe_hw * hw,u32 addr,u32 dir,u32 reg,u16 data)375 u16 pch_gbe_mac_ctrl_miim(struct pch_gbe_hw *hw, u32 addr, u32 dir, u32 reg,
376 u16 data)
377 {
378 u32 data_out = 0;
379 unsigned int i;
380 unsigned long flags;
381
382 spin_lock_irqsave(&hw->miim_lock, flags);
383
384 for (i = 100; i; --i) {
385 if ((ioread32(&hw->reg->MIIM) & PCH_GBE_MIIM_OPER_READY))
386 break;
387 udelay(20);
388 }
389 if (i == 0) {
390 pr_err("pch-gbe.miim won't go Ready\n");
391 spin_unlock_irqrestore(&hw->miim_lock, flags);
392 return 0; /* No way to indicate timeout error */
393 }
394 iowrite32(((reg << PCH_GBE_MIIM_REG_ADDR_SHIFT) |
395 (addr << PCH_GBE_MIIM_PHY_ADDR_SHIFT) |
396 dir | data), &hw->reg->MIIM);
397 for (i = 0; i < 100; i++) {
398 udelay(20);
399 data_out = ioread32(&hw->reg->MIIM);
400 if ((data_out & PCH_GBE_MIIM_OPER_READY))
401 break;
402 }
403 spin_unlock_irqrestore(&hw->miim_lock, flags);
404
405 pr_debug("PHY %s: reg=%d, data=0x%04X\n",
406 dir == PCH_GBE_MIIM_OPER_READ ? "READ" : "WRITE", reg,
407 dir == PCH_GBE_MIIM_OPER_READ ? data_out : data);
408 return (u16) data_out;
409 }
410
411 /**
412 * pch_gbe_mac_set_pause_packet - Set pause packet
413 * @hw: Pointer to the HW structure
414 */
pch_gbe_mac_set_pause_packet(struct pch_gbe_hw * hw)415 static void pch_gbe_mac_set_pause_packet(struct pch_gbe_hw *hw)
416 {
417 unsigned long tmp2, tmp3;
418
419 /* Set Pause packet */
420 tmp2 = hw->mac.addr[1];
421 tmp2 = (tmp2 << 8) | hw->mac.addr[0];
422 tmp2 = PCH_GBE_PAUSE_PKT2_VALUE | (tmp2 << 16);
423
424 tmp3 = hw->mac.addr[5];
425 tmp3 = (tmp3 << 8) | hw->mac.addr[4];
426 tmp3 = (tmp3 << 8) | hw->mac.addr[3];
427 tmp3 = (tmp3 << 8) | hw->mac.addr[2];
428
429 iowrite32(PCH_GBE_PAUSE_PKT1_VALUE, &hw->reg->PAUSE_PKT1);
430 iowrite32(tmp2, &hw->reg->PAUSE_PKT2);
431 iowrite32(tmp3, &hw->reg->PAUSE_PKT3);
432 iowrite32(PCH_GBE_PAUSE_PKT4_VALUE, &hw->reg->PAUSE_PKT4);
433 iowrite32(PCH_GBE_PAUSE_PKT5_VALUE, &hw->reg->PAUSE_PKT5);
434
435 /* Transmit Pause Packet */
436 iowrite32(PCH_GBE_PS_PKT_RQ, &hw->reg->PAUSE_REQ);
437
438 pr_debug("PAUSE_PKT1-5 reg : 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n",
439 ioread32(&hw->reg->PAUSE_PKT1), ioread32(&hw->reg->PAUSE_PKT2),
440 ioread32(&hw->reg->PAUSE_PKT3), ioread32(&hw->reg->PAUSE_PKT4),
441 ioread32(&hw->reg->PAUSE_PKT5));
442
443 return;
444 }
445
446
447 /**
448 * pch_gbe_alloc_queues - Allocate memory for all rings
449 * @adapter: Board private structure to initialize
450 * Returns
451 * 0: Successfully
452 * Negative value: Failed
453 */
pch_gbe_alloc_queues(struct pch_gbe_adapter * adapter)454 static int pch_gbe_alloc_queues(struct pch_gbe_adapter *adapter)
455 {
456 int size;
457
458 size = (int)sizeof(struct pch_gbe_tx_ring);
459 adapter->tx_ring = kzalloc(size, GFP_KERNEL);
460 if (!adapter->tx_ring)
461 return -ENOMEM;
462 size = (int)sizeof(struct pch_gbe_rx_ring);
463 adapter->rx_ring = kzalloc(size, GFP_KERNEL);
464 if (!adapter->rx_ring) {
465 kfree(adapter->tx_ring);
466 return -ENOMEM;
467 }
468 return 0;
469 }
470
471 /**
472 * pch_gbe_init_stats - Initialize status
473 * @adapter: Board private structure to initialize
474 */
pch_gbe_init_stats(struct pch_gbe_adapter * adapter)475 static void pch_gbe_init_stats(struct pch_gbe_adapter *adapter)
476 {
477 memset(&adapter->stats, 0, sizeof(adapter->stats));
478 return;
479 }
480
481 /**
482 * pch_gbe_init_phy - Initialize PHY
483 * @adapter: Board private structure to initialize
484 * Returns
485 * 0: Successfully
486 * Negative value: Failed
487 */
pch_gbe_init_phy(struct pch_gbe_adapter * adapter)488 static int pch_gbe_init_phy(struct pch_gbe_adapter *adapter)
489 {
490 struct net_device *netdev = adapter->netdev;
491 u32 addr;
492 u16 bmcr, stat;
493
494 /* Discover phy addr by searching addrs in order {1,0,2,..., 31} */
495 for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
496 adapter->mii.phy_id = (addr == 0) ? 1 : (addr == 1) ? 0 : addr;
497 bmcr = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMCR);
498 stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
499 stat = pch_gbe_mdio_read(netdev, adapter->mii.phy_id, MII_BMSR);
500 if (!((bmcr == 0xFFFF) || ((stat == 0) && (bmcr == 0))))
501 break;
502 }
503 adapter->hw.phy.addr = adapter->mii.phy_id;
504 pr_debug("phy_addr = %d\n", adapter->mii.phy_id);
505 if (addr == 32)
506 return -EAGAIN;
507 /* Selected the phy and isolate the rest */
508 for (addr = 0; addr < PCH_GBE_PHY_REGS_LEN; addr++) {
509 if (addr != adapter->mii.phy_id) {
510 pch_gbe_mdio_write(netdev, addr, MII_BMCR,
511 BMCR_ISOLATE);
512 } else {
513 bmcr = pch_gbe_mdio_read(netdev, addr, MII_BMCR);
514 pch_gbe_mdio_write(netdev, addr, MII_BMCR,
515 bmcr & ~BMCR_ISOLATE);
516 }
517 }
518
519 /* MII setup */
520 adapter->mii.phy_id_mask = 0x1F;
521 adapter->mii.reg_num_mask = 0x1F;
522 adapter->mii.dev = adapter->netdev;
523 adapter->mii.mdio_read = pch_gbe_mdio_read;
524 adapter->mii.mdio_write = pch_gbe_mdio_write;
525 adapter->mii.supports_gmii = mii_check_gmii_support(&adapter->mii);
526 return 0;
527 }
528
529 /**
530 * pch_gbe_mdio_read - The read function for mii
531 * @netdev: Network interface device structure
532 * @addr: Phy ID
533 * @reg: Access location
534 * Returns
535 * 0: Successfully
536 * Negative value: Failed
537 */
pch_gbe_mdio_read(struct net_device * netdev,int addr,int reg)538 static int pch_gbe_mdio_read(struct net_device *netdev, int addr, int reg)
539 {
540 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
541 struct pch_gbe_hw *hw = &adapter->hw;
542
543 return pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_READ, reg,
544 (u16) 0);
545 }
546
547 /**
548 * pch_gbe_mdio_write - The write function for mii
549 * @netdev: Network interface device structure
550 * @addr: Phy ID (not used)
551 * @reg: Access location
552 * @data: Write data
553 */
pch_gbe_mdio_write(struct net_device * netdev,int addr,int reg,int data)554 static void pch_gbe_mdio_write(struct net_device *netdev,
555 int addr, int reg, int data)
556 {
557 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
558 struct pch_gbe_hw *hw = &adapter->hw;
559
560 pch_gbe_mac_ctrl_miim(hw, addr, PCH_GBE_HAL_MIIM_WRITE, reg, data);
561 }
562
563 /**
564 * pch_gbe_reset_task - Reset processing at the time of transmission timeout
565 * @work: Pointer of board private structure
566 */
pch_gbe_reset_task(struct work_struct * work)567 static void pch_gbe_reset_task(struct work_struct *work)
568 {
569 struct pch_gbe_adapter *adapter;
570 adapter = container_of(work, struct pch_gbe_adapter, reset_task);
571
572 rtnl_lock();
573 pch_gbe_reinit_locked(adapter);
574 rtnl_unlock();
575 }
576
577 /**
578 * pch_gbe_reinit_locked- Re-initialization
579 * @adapter: Board private structure
580 */
pch_gbe_reinit_locked(struct pch_gbe_adapter * adapter)581 void pch_gbe_reinit_locked(struct pch_gbe_adapter *adapter)
582 {
583 pch_gbe_down(adapter);
584 pch_gbe_up(adapter);
585 }
586
587 /**
588 * pch_gbe_reset - Reset GbE
589 * @adapter: Board private structure
590 */
pch_gbe_reset(struct pch_gbe_adapter * adapter)591 void pch_gbe_reset(struct pch_gbe_adapter *adapter)
592 {
593 pch_gbe_mac_reset_hw(&adapter->hw);
594 /* Setup the receive address. */
595 pch_gbe_mac_init_rx_addrs(&adapter->hw, PCH_GBE_MAR_ENTRIES);
596 if (pch_gbe_hal_init_hw(&adapter->hw))
597 pr_err("Hardware Error\n");
598 }
599
600 /**
601 * pch_gbe_free_irq - Free an interrupt
602 * @adapter: Board private structure
603 */
pch_gbe_free_irq(struct pch_gbe_adapter * adapter)604 static void pch_gbe_free_irq(struct pch_gbe_adapter *adapter)
605 {
606 struct net_device *netdev = adapter->netdev;
607
608 free_irq(adapter->pdev->irq, netdev);
609 if (adapter->have_msi) {
610 pci_disable_msi(adapter->pdev);
611 pr_debug("call pci_disable_msi\n");
612 }
613 }
614
615 /**
616 * pch_gbe_irq_disable - Mask off interrupt generation on the NIC
617 * @adapter: Board private structure
618 */
pch_gbe_irq_disable(struct pch_gbe_adapter * adapter)619 static void pch_gbe_irq_disable(struct pch_gbe_adapter *adapter)
620 {
621 struct pch_gbe_hw *hw = &adapter->hw;
622
623 atomic_inc(&adapter->irq_sem);
624 iowrite32(0, &hw->reg->INT_EN);
625 ioread32(&hw->reg->INT_ST);
626 synchronize_irq(adapter->pdev->irq);
627
628 pr_debug("INT_EN reg : 0x%08x\n", ioread32(&hw->reg->INT_EN));
629 }
630
631 /**
632 * pch_gbe_irq_enable - Enable default interrupt generation settings
633 * @adapter: Board private structure
634 */
pch_gbe_irq_enable(struct pch_gbe_adapter * adapter)635 static void pch_gbe_irq_enable(struct pch_gbe_adapter *adapter)
636 {
637 struct pch_gbe_hw *hw = &adapter->hw;
638
639 if (likely(atomic_dec_and_test(&adapter->irq_sem)))
640 iowrite32(PCH_GBE_INT_ENABLE_MASK, &hw->reg->INT_EN);
641 ioread32(&hw->reg->INT_ST);
642 pr_debug("INT_EN reg : 0x%08x\n", ioread32(&hw->reg->INT_EN));
643 }
644
645
646
647 /**
648 * pch_gbe_setup_tctl - configure the Transmit control registers
649 * @adapter: Board private structure
650 */
pch_gbe_setup_tctl(struct pch_gbe_adapter * adapter)651 static void pch_gbe_setup_tctl(struct pch_gbe_adapter *adapter)
652 {
653 struct pch_gbe_hw *hw = &adapter->hw;
654 u32 tx_mode, tcpip;
655
656 tx_mode = PCH_GBE_TM_LONG_PKT |
657 PCH_GBE_TM_ST_AND_FD |
658 PCH_GBE_TM_SHORT_PKT |
659 PCH_GBE_TM_TH_TX_STRT_8 |
660 PCH_GBE_TM_TH_ALM_EMP_4 | PCH_GBE_TM_TH_ALM_FULL_8;
661
662 iowrite32(tx_mode, &hw->reg->TX_MODE);
663
664 tcpip = ioread32(&hw->reg->TCPIP_ACC);
665 tcpip |= PCH_GBE_TX_TCPIPACC_EN;
666 iowrite32(tcpip, &hw->reg->TCPIP_ACC);
667 return;
668 }
669
670 /**
671 * pch_gbe_configure_tx - Configure Transmit Unit after Reset
672 * @adapter: Board private structure
673 */
pch_gbe_configure_tx(struct pch_gbe_adapter * adapter)674 static void pch_gbe_configure_tx(struct pch_gbe_adapter *adapter)
675 {
676 struct pch_gbe_hw *hw = &adapter->hw;
677 u32 tdba, tdlen, dctrl;
678
679 pr_debug("dma addr = 0x%08llx size = 0x%08x\n",
680 (unsigned long long)adapter->tx_ring->dma,
681 adapter->tx_ring->size);
682
683 /* Setup the HW Tx Head and Tail descriptor pointers */
684 tdba = adapter->tx_ring->dma;
685 tdlen = adapter->tx_ring->size - 0x10;
686 iowrite32(tdba, &hw->reg->TX_DSC_BASE);
687 iowrite32(tdlen, &hw->reg->TX_DSC_SIZE);
688 iowrite32(tdba, &hw->reg->TX_DSC_SW_P);
689
690 /* Enables Transmission DMA */
691 dctrl = ioread32(&hw->reg->DMA_CTRL);
692 dctrl |= PCH_GBE_TX_DMA_EN;
693 iowrite32(dctrl, &hw->reg->DMA_CTRL);
694 }
695
696 /**
697 * pch_gbe_setup_rctl - Configure the receive control registers
698 * @adapter: Board private structure
699 */
pch_gbe_setup_rctl(struct pch_gbe_adapter * adapter)700 static void pch_gbe_setup_rctl(struct pch_gbe_adapter *adapter)
701 {
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 */
pch_gbe_configure_rx(struct pch_gbe_adapter * adapter)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 */
pch_gbe_unmap_and_free_tx_resource(struct pch_gbe_adapter * adapter,struct pch_gbe_buffer * buffer_info)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 */
pch_gbe_unmap_and_free_rx_resource(struct pch_gbe_adapter * adapter,struct pch_gbe_buffer * buffer_info)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 */
pch_gbe_clean_tx_ring(struct pch_gbe_adapter * adapter,struct pch_gbe_tx_ring * tx_ring)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
pch_gbe_clean_rx_ring(struct pch_gbe_adapter * adapter,struct pch_gbe_rx_ring * rx_ring)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
pch_gbe_set_rgmii_ctrl(struct pch_gbe_adapter * adapter,u16 speed,u16 duplex)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 }
pch_gbe_set_mode(struct pch_gbe_adapter * adapter,u16 speed,u16 duplex)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 */
pch_gbe_watchdog(unsigned long data)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 */
pch_gbe_tx_queue(struct pch_gbe_adapter * adapter,struct pch_gbe_tx_ring * tx_ring,struct sk_buff * skb)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 */
pch_gbe_update_stats(struct pch_gbe_adapter * adapter)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
pch_gbe_stop_receive(struct pch_gbe_adapter * adapter)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
pch_gbe_start_receive(struct pch_gbe_hw * hw)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 */
pch_gbe_intr(int irq,void * data)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 int_st |= ioread32(&hw->reg->INT_ST);
1203 int_st = int_st & ioread32(&hw->reg->INT_EN);
1204 }
1205 if (int_st & PCH_GBE_INT_RX_DMA_ERR)
1206 adapter->stats.intr_rx_dma_err_count++;
1207 if (int_st & PCH_GBE_INT_TX_FIFO_ERR)
1208 adapter->stats.intr_tx_fifo_err_count++;
1209 if (int_st & PCH_GBE_INT_TX_DMA_ERR)
1210 adapter->stats.intr_tx_dma_err_count++;
1211 if (int_st & PCH_GBE_INT_TCPIP_ERR)
1212 adapter->stats.intr_tcpip_err_count++;
1213 /* When Rx descriptor is empty */
1214 if ((int_st & PCH_GBE_INT_RX_DSC_EMP)) {
1215 adapter->stats.intr_rx_dsc_empty_count++;
1216 pr_debug("Rx descriptor is empty\n");
1217 int_en = ioread32(&hw->reg->INT_EN);
1218 iowrite32((int_en & ~PCH_GBE_INT_RX_DSC_EMP), &hw->reg->INT_EN);
1219 if (hw->mac.tx_fc_enable) {
1220 /* Set Pause packet */
1221 pch_gbe_mac_set_pause_packet(hw);
1222 }
1223 }
1224
1225 /* When request status is Receive interruption */
1226 if ((int_st & (PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT)) ||
1227 (adapter->rx_stop_flag == true)) {
1228 if (likely(napi_schedule_prep(&adapter->napi))) {
1229 /* Enable only Rx Descriptor empty */
1230 atomic_inc(&adapter->irq_sem);
1231 int_en = ioread32(&hw->reg->INT_EN);
1232 int_en &=
1233 ~(PCH_GBE_INT_RX_DMA_CMPLT | PCH_GBE_INT_TX_CMPLT);
1234 iowrite32(int_en, &hw->reg->INT_EN);
1235 /* Start polling for NAPI */
1236 __napi_schedule(&adapter->napi);
1237 }
1238 }
1239 pr_debug("return = 0x%08x INT_EN reg = 0x%08x\n",
1240 IRQ_HANDLED, ioread32(&hw->reg->INT_EN));
1241 return IRQ_HANDLED;
1242 }
1243
1244 /**
1245 * pch_gbe_alloc_rx_buffers - Replace used receive buffers; legacy & extended
1246 * @adapter: Board private structure
1247 * @rx_ring: Rx descriptor ring
1248 * @cleaned_count: Cleaned count
1249 */
1250 static void
pch_gbe_alloc_rx_buffers(struct pch_gbe_adapter * adapter,struct pch_gbe_rx_ring * rx_ring,int cleaned_count)1251 pch_gbe_alloc_rx_buffers(struct pch_gbe_adapter *adapter,
1252 struct pch_gbe_rx_ring *rx_ring, int cleaned_count)
1253 {
1254 struct net_device *netdev = adapter->netdev;
1255 struct pci_dev *pdev = adapter->pdev;
1256 struct pch_gbe_hw *hw = &adapter->hw;
1257 struct pch_gbe_rx_desc *rx_desc;
1258 struct pch_gbe_buffer *buffer_info;
1259 struct sk_buff *skb;
1260 unsigned int i;
1261 unsigned int bufsz;
1262
1263 bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
1264 i = rx_ring->next_to_use;
1265
1266 while ((cleaned_count--)) {
1267 buffer_info = &rx_ring->buffer_info[i];
1268 skb = netdev_alloc_skb(netdev, bufsz);
1269 if (unlikely(!skb)) {
1270 /* Better luck next round */
1271 adapter->stats.rx_alloc_buff_failed++;
1272 break;
1273 }
1274 /* align */
1275 skb_reserve(skb, NET_IP_ALIGN);
1276 buffer_info->skb = skb;
1277
1278 buffer_info->dma = dma_map_single(&pdev->dev,
1279 buffer_info->rx_buffer,
1280 buffer_info->length,
1281 DMA_FROM_DEVICE);
1282 if (dma_mapping_error(&adapter->pdev->dev, buffer_info->dma)) {
1283 dev_kfree_skb(skb);
1284 buffer_info->skb = NULL;
1285 buffer_info->dma = 0;
1286 adapter->stats.rx_alloc_buff_failed++;
1287 break; /* while !buffer_info->skb */
1288 }
1289 buffer_info->mapped = true;
1290 rx_desc = PCH_GBE_RX_DESC(*rx_ring, i);
1291 rx_desc->buffer_addr = (buffer_info->dma);
1292 rx_desc->gbec_status = DSC_INIT16;
1293
1294 pr_debug("i = %d buffer_info->dma = 0x08%llx buffer_info->length = 0x%x\n",
1295 i, (unsigned long long)buffer_info->dma,
1296 buffer_info->length);
1297
1298 if (unlikely(++i == rx_ring->count))
1299 i = 0;
1300 }
1301 if (likely(rx_ring->next_to_use != i)) {
1302 rx_ring->next_to_use = i;
1303 if (unlikely(i-- == 0))
1304 i = (rx_ring->count - 1);
1305 iowrite32(rx_ring->dma +
1306 (int)sizeof(struct pch_gbe_rx_desc) * i,
1307 &hw->reg->RX_DSC_SW_P);
1308 }
1309 return;
1310 }
1311
1312 static int
pch_gbe_alloc_rx_buffers_pool(struct pch_gbe_adapter * adapter,struct pch_gbe_rx_ring * rx_ring,int cleaned_count)1313 pch_gbe_alloc_rx_buffers_pool(struct pch_gbe_adapter *adapter,
1314 struct pch_gbe_rx_ring *rx_ring, int cleaned_count)
1315 {
1316 struct pci_dev *pdev = adapter->pdev;
1317 struct pch_gbe_buffer *buffer_info;
1318 unsigned int i;
1319 unsigned int bufsz;
1320 unsigned int size;
1321
1322 bufsz = adapter->rx_buffer_len;
1323
1324 size = rx_ring->count * bufsz + PCH_GBE_RESERVE_MEMORY;
1325 rx_ring->rx_buff_pool = dma_alloc_coherent(&pdev->dev, size,
1326 &rx_ring->rx_buff_pool_logic,
1327 GFP_KERNEL);
1328 if (!rx_ring->rx_buff_pool) {
1329 pr_err("Unable to allocate memory for the receive poll buffer\n");
1330 return -ENOMEM;
1331 }
1332 memset(rx_ring->rx_buff_pool, 0, size);
1333 rx_ring->rx_buff_pool_size = size;
1334 for (i = 0; i < rx_ring->count; i++) {
1335 buffer_info = &rx_ring->buffer_info[i];
1336 buffer_info->rx_buffer = rx_ring->rx_buff_pool + bufsz * i;
1337 buffer_info->length = bufsz;
1338 }
1339 return 0;
1340 }
1341
1342 /**
1343 * pch_gbe_alloc_tx_buffers - Allocate transmit buffers
1344 * @adapter: Board private structure
1345 * @tx_ring: Tx descriptor ring
1346 */
pch_gbe_alloc_tx_buffers(struct pch_gbe_adapter * adapter,struct pch_gbe_tx_ring * tx_ring)1347 static void pch_gbe_alloc_tx_buffers(struct pch_gbe_adapter *adapter,
1348 struct pch_gbe_tx_ring *tx_ring)
1349 {
1350 struct pch_gbe_buffer *buffer_info;
1351 struct sk_buff *skb;
1352 unsigned int i;
1353 unsigned int bufsz;
1354 struct pch_gbe_tx_desc *tx_desc;
1355
1356 bufsz =
1357 adapter->hw.mac.max_frame_size + PCH_GBE_DMA_ALIGN + NET_IP_ALIGN;
1358
1359 for (i = 0; i < tx_ring->count; i++) {
1360 buffer_info = &tx_ring->buffer_info[i];
1361 skb = netdev_alloc_skb(adapter->netdev, bufsz);
1362 skb_reserve(skb, PCH_GBE_DMA_ALIGN);
1363 buffer_info->skb = skb;
1364 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1365 tx_desc->gbec_status = (DSC_INIT16);
1366 }
1367 return;
1368 }
1369
1370 /**
1371 * pch_gbe_clean_tx - Reclaim resources after transmit completes
1372 * @adapter: Board private structure
1373 * @tx_ring: Tx descriptor ring
1374 * Returns
1375 * true: Cleaned the descriptor
1376 * false: Not cleaned the descriptor
1377 */
1378 static bool
pch_gbe_clean_tx(struct pch_gbe_adapter * adapter,struct pch_gbe_tx_ring * tx_ring)1379 pch_gbe_clean_tx(struct pch_gbe_adapter *adapter,
1380 struct pch_gbe_tx_ring *tx_ring)
1381 {
1382 struct pch_gbe_tx_desc *tx_desc;
1383 struct pch_gbe_buffer *buffer_info;
1384 struct sk_buff *skb;
1385 unsigned int i;
1386 unsigned int cleaned_count = 0;
1387 bool cleaned = true;
1388
1389 pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean);
1390
1391 i = tx_ring->next_to_clean;
1392 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1393 pr_debug("gbec_status:0x%04x dma_status:0x%04x\n",
1394 tx_desc->gbec_status, tx_desc->dma_status);
1395
1396 while ((tx_desc->gbec_status & DSC_INIT16) == 0x0000) {
1397 pr_debug("gbec_status:0x%04x\n", tx_desc->gbec_status);
1398 buffer_info = &tx_ring->buffer_info[i];
1399 skb = buffer_info->skb;
1400
1401 if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_ABT)) {
1402 adapter->stats.tx_aborted_errors++;
1403 pr_err("Transfer Abort Error\n");
1404 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CRSER)
1405 ) {
1406 adapter->stats.tx_carrier_errors++;
1407 pr_err("Transfer Carrier Sense Error\n");
1408 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_EXCOL)
1409 ) {
1410 adapter->stats.tx_aborted_errors++;
1411 pr_err("Transfer Collision Abort Error\n");
1412 } else if ((tx_desc->gbec_status &
1413 (PCH_GBE_TXD_GMAC_STAT_SNGCOL |
1414 PCH_GBE_TXD_GMAC_STAT_MLTCOL))) {
1415 adapter->stats.collisions++;
1416 adapter->stats.tx_packets++;
1417 adapter->stats.tx_bytes += skb->len;
1418 pr_debug("Transfer Collision\n");
1419 } else if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_CMPLT)
1420 ) {
1421 adapter->stats.tx_packets++;
1422 adapter->stats.tx_bytes += skb->len;
1423 }
1424 if (buffer_info->mapped) {
1425 pr_debug("unmap buffer_info->dma : %d\n", i);
1426 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1427 buffer_info->length, DMA_TO_DEVICE);
1428 buffer_info->mapped = false;
1429 }
1430 if (buffer_info->skb) {
1431 pr_debug("trim buffer_info->skb : %d\n", i);
1432 skb_trim(buffer_info->skb, 0);
1433 }
1434 tx_desc->gbec_status = DSC_INIT16;
1435 if (unlikely(++i == tx_ring->count))
1436 i = 0;
1437 tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
1438
1439 /* weight of a sort for tx, to avoid endless transmit cleanup */
1440 if (cleaned_count++ == PCH_GBE_TX_WEIGHT) {
1441 cleaned = false;
1442 break;
1443 }
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
pch_gbe_clean_rx(struct pch_gbe_adapter * adapter,struct pch_gbe_rx_ring * rx_ring,int * work_done,int work_to_do)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 */
pch_gbe_setup_tx_resources(struct pch_gbe_adapter * adapter,struct pch_gbe_tx_ring * tx_ring)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 */
pch_gbe_setup_rx_resources(struct pch_gbe_adapter * adapter,struct pch_gbe_rx_ring * rx_ring)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 */
pch_gbe_free_tx_resources(struct pch_gbe_adapter * adapter,struct pch_gbe_tx_ring * tx_ring)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 */
pch_gbe_free_rx_resources(struct pch_gbe_adapter * adapter,struct pch_gbe_rx_ring * rx_ring)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 */
pch_gbe_request_irq(struct pch_gbe_adapter * adapter)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 */
pch_gbe_up(struct pch_gbe_adapter * adapter)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 /* Ensure we have a valid MAC */
1749 if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
1750 pr_err("Error: Invalid MAC address\n");
1751 return -EINVAL;
1752 }
1753
1754 /* hardware has been reset, we need to reload some things */
1755 pch_gbe_set_multi(netdev);
1756
1757 pch_gbe_setup_tctl(adapter);
1758 pch_gbe_configure_tx(adapter);
1759 pch_gbe_setup_rctl(adapter);
1760 pch_gbe_configure_rx(adapter);
1761
1762 err = pch_gbe_request_irq(adapter);
1763 if (err) {
1764 pr_err("Error: can't bring device up\n");
1765 return err;
1766 }
1767 err = pch_gbe_alloc_rx_buffers_pool(adapter, rx_ring, rx_ring->count);
1768 if (err) {
1769 pr_err("Error: can't bring device up\n");
1770 return err;
1771 }
1772 pch_gbe_alloc_tx_buffers(adapter, tx_ring);
1773 pch_gbe_alloc_rx_buffers(adapter, rx_ring, rx_ring->count);
1774 adapter->tx_queue_len = netdev->tx_queue_len;
1775 pch_gbe_start_receive(&adapter->hw);
1776
1777 mod_timer(&adapter->watchdog_timer, jiffies);
1778
1779 napi_enable(&adapter->napi);
1780 pch_gbe_irq_enable(adapter);
1781 netif_start_queue(adapter->netdev);
1782
1783 return 0;
1784 }
1785
1786 /**
1787 * pch_gbe_down - Down GbE network device
1788 * @adapter: Board private structure
1789 */
pch_gbe_down(struct pch_gbe_adapter * adapter)1790 void pch_gbe_down(struct pch_gbe_adapter *adapter)
1791 {
1792 struct net_device *netdev = adapter->netdev;
1793 struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
1794
1795 /* signal that we're down so the interrupt handler does not
1796 * reschedule our watchdog timer */
1797 napi_disable(&adapter->napi);
1798 atomic_set(&adapter->irq_sem, 0);
1799
1800 pch_gbe_irq_disable(adapter);
1801 pch_gbe_free_irq(adapter);
1802
1803 del_timer_sync(&adapter->watchdog_timer);
1804
1805 netdev->tx_queue_len = adapter->tx_queue_len;
1806 netif_carrier_off(netdev);
1807 netif_stop_queue(netdev);
1808
1809 pch_gbe_reset(adapter);
1810 pch_gbe_clean_tx_ring(adapter, adapter->tx_ring);
1811 pch_gbe_clean_rx_ring(adapter, adapter->rx_ring);
1812
1813 pci_free_consistent(adapter->pdev, rx_ring->rx_buff_pool_size,
1814 rx_ring->rx_buff_pool, rx_ring->rx_buff_pool_logic);
1815 rx_ring->rx_buff_pool_logic = 0;
1816 rx_ring->rx_buff_pool_size = 0;
1817 rx_ring->rx_buff_pool = NULL;
1818 }
1819
1820 /**
1821 * pch_gbe_sw_init - Initialize general software structures (struct pch_gbe_adapter)
1822 * @adapter: Board private structure to initialize
1823 * Returns
1824 * 0: Successfully
1825 * Negative value: Failed
1826 */
pch_gbe_sw_init(struct pch_gbe_adapter * adapter)1827 static int pch_gbe_sw_init(struct pch_gbe_adapter *adapter)
1828 {
1829 struct pch_gbe_hw *hw = &adapter->hw;
1830 struct net_device *netdev = adapter->netdev;
1831
1832 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
1833 hw->mac.max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1834 hw->mac.min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1835
1836 /* Initialize the hardware-specific values */
1837 if (pch_gbe_hal_setup_init_funcs(hw)) {
1838 pr_err("Hardware Initialization Failure\n");
1839 return -EIO;
1840 }
1841 if (pch_gbe_alloc_queues(adapter)) {
1842 pr_err("Unable to allocate memory for queues\n");
1843 return -ENOMEM;
1844 }
1845 spin_lock_init(&adapter->hw.miim_lock);
1846 spin_lock_init(&adapter->tx_queue_lock);
1847 spin_lock_init(&adapter->stats_lock);
1848 spin_lock_init(&adapter->ethtool_lock);
1849 atomic_set(&adapter->irq_sem, 0);
1850 pch_gbe_irq_disable(adapter);
1851
1852 pch_gbe_init_stats(adapter);
1853
1854 pr_debug("rx_buffer_len : %d mac.min_frame_size : %d mac.max_frame_size : %d\n",
1855 (u32) adapter->rx_buffer_len,
1856 hw->mac.min_frame_size, hw->mac.max_frame_size);
1857 return 0;
1858 }
1859
1860 /**
1861 * pch_gbe_open - Called when a network interface is made active
1862 * @netdev: Network interface device structure
1863 * Returns
1864 * 0: Successfully
1865 * Negative value: Failed
1866 */
pch_gbe_open(struct net_device * netdev)1867 static int pch_gbe_open(struct net_device *netdev)
1868 {
1869 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1870 struct pch_gbe_hw *hw = &adapter->hw;
1871 int err;
1872
1873 /* allocate transmit descriptors */
1874 err = pch_gbe_setup_tx_resources(adapter, adapter->tx_ring);
1875 if (err)
1876 goto err_setup_tx;
1877 /* allocate receive descriptors */
1878 err = pch_gbe_setup_rx_resources(adapter, adapter->rx_ring);
1879 if (err)
1880 goto err_setup_rx;
1881 pch_gbe_hal_power_up_phy(hw);
1882 err = pch_gbe_up(adapter);
1883 if (err)
1884 goto err_up;
1885 pr_debug("Success End\n");
1886 return 0;
1887
1888 err_up:
1889 if (!adapter->wake_up_evt)
1890 pch_gbe_hal_power_down_phy(hw);
1891 pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
1892 err_setup_rx:
1893 pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
1894 err_setup_tx:
1895 pch_gbe_reset(adapter);
1896 pr_err("Error End\n");
1897 return err;
1898 }
1899
1900 /**
1901 * pch_gbe_stop - Disables a network interface
1902 * @netdev: Network interface device structure
1903 * Returns
1904 * 0: Successfully
1905 */
pch_gbe_stop(struct net_device * netdev)1906 static int pch_gbe_stop(struct net_device *netdev)
1907 {
1908 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1909 struct pch_gbe_hw *hw = &adapter->hw;
1910
1911 pch_gbe_down(adapter);
1912 if (!adapter->wake_up_evt)
1913 pch_gbe_hal_power_down_phy(hw);
1914 pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
1915 pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
1916 return 0;
1917 }
1918
1919 /**
1920 * pch_gbe_xmit_frame - Packet transmitting start
1921 * @skb: Socket buffer structure
1922 * @netdev: Network interface device structure
1923 * Returns
1924 * - NETDEV_TX_OK: Normal end
1925 * - NETDEV_TX_BUSY: Error end
1926 */
pch_gbe_xmit_frame(struct sk_buff * skb,struct net_device * netdev)1927 static int pch_gbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1928 {
1929 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1930 struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
1931 unsigned long flags;
1932
1933 if (unlikely(skb->len > (adapter->hw.mac.max_frame_size - 4))) {
1934 pr_err("Transfer length Error: skb len: %d > max: %d\n",
1935 skb->len, adapter->hw.mac.max_frame_size);
1936 dev_kfree_skb_any(skb);
1937 adapter->stats.tx_length_errors++;
1938 return NETDEV_TX_OK;
1939 }
1940 if (!spin_trylock_irqsave(&tx_ring->tx_lock, flags)) {
1941 /* Collision - tell upper layer to requeue */
1942 return NETDEV_TX_LOCKED;
1943 }
1944 if (unlikely(!PCH_GBE_DESC_UNUSED(tx_ring))) {
1945 netif_stop_queue(netdev);
1946 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1947 pr_debug("Return : BUSY next_to use : 0x%08x next_to clean : 0x%08x\n",
1948 tx_ring->next_to_use, tx_ring->next_to_clean);
1949 return NETDEV_TX_BUSY;
1950 }
1951 spin_unlock_irqrestore(&tx_ring->tx_lock, flags);
1952
1953 /* CRC,ITAG no support */
1954 pch_gbe_tx_queue(adapter, tx_ring, skb);
1955 return NETDEV_TX_OK;
1956 }
1957
1958 /**
1959 * pch_gbe_get_stats - Get System Network Statistics
1960 * @netdev: Network interface device structure
1961 * Returns: The current stats
1962 */
pch_gbe_get_stats(struct net_device * netdev)1963 static struct net_device_stats *pch_gbe_get_stats(struct net_device *netdev)
1964 {
1965 /* only return the current stats */
1966 return &netdev->stats;
1967 }
1968
1969 /**
1970 * pch_gbe_set_multi - Multicast and Promiscuous mode set
1971 * @netdev: Network interface device structure
1972 */
pch_gbe_set_multi(struct net_device * netdev)1973 static void pch_gbe_set_multi(struct net_device *netdev)
1974 {
1975 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
1976 struct pch_gbe_hw *hw = &adapter->hw;
1977 struct netdev_hw_addr *ha;
1978 u8 *mta_list;
1979 u32 rctl;
1980 int i;
1981 int mc_count;
1982
1983 pr_debug("netdev->flags : 0x%08x\n", netdev->flags);
1984
1985 /* Check for Promiscuous and All Multicast modes */
1986 rctl = ioread32(&hw->reg->RX_MODE);
1987 mc_count = netdev_mc_count(netdev);
1988 if ((netdev->flags & IFF_PROMISC)) {
1989 rctl &= ~PCH_GBE_ADD_FIL_EN;
1990 rctl &= ~PCH_GBE_MLT_FIL_EN;
1991 } else if ((netdev->flags & IFF_ALLMULTI)) {
1992 /* all the multicasting receive permissions */
1993 rctl |= PCH_GBE_ADD_FIL_EN;
1994 rctl &= ~PCH_GBE_MLT_FIL_EN;
1995 } else {
1996 if (mc_count >= PCH_GBE_MAR_ENTRIES) {
1997 /* all the multicasting receive permissions */
1998 rctl |= PCH_GBE_ADD_FIL_EN;
1999 rctl &= ~PCH_GBE_MLT_FIL_EN;
2000 } else {
2001 rctl |= (PCH_GBE_ADD_FIL_EN | PCH_GBE_MLT_FIL_EN);
2002 }
2003 }
2004 iowrite32(rctl, &hw->reg->RX_MODE);
2005
2006 if (mc_count >= PCH_GBE_MAR_ENTRIES)
2007 return;
2008 mta_list = kmalloc(mc_count * ETH_ALEN, GFP_ATOMIC);
2009 if (!mta_list)
2010 return;
2011
2012 /* The shared function expects a packed array of only addresses. */
2013 i = 0;
2014 netdev_for_each_mc_addr(ha, netdev) {
2015 if (i == mc_count)
2016 break;
2017 memcpy(mta_list + (i++ * ETH_ALEN), &ha->addr, ETH_ALEN);
2018 }
2019 pch_gbe_mac_mc_addr_list_update(hw, mta_list, i, 1,
2020 PCH_GBE_MAR_ENTRIES);
2021 kfree(mta_list);
2022
2023 pr_debug("RX_MODE reg(check bit31,30 ADD,MLT) : 0x%08x netdev->mc_count : 0x%08x\n",
2024 ioread32(&hw->reg->RX_MODE), mc_count);
2025 }
2026
2027 /**
2028 * pch_gbe_set_mac - Change the Ethernet Address of the NIC
2029 * @netdev: Network interface device structure
2030 * @addr: Pointer to an address structure
2031 * Returns
2032 * 0: Successfully
2033 * -EADDRNOTAVAIL: Failed
2034 */
pch_gbe_set_mac(struct net_device * netdev,void * addr)2035 static int pch_gbe_set_mac(struct net_device *netdev, void *addr)
2036 {
2037 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2038 struct sockaddr *skaddr = addr;
2039 int ret_val;
2040
2041 if (!is_valid_ether_addr(skaddr->sa_data)) {
2042 ret_val = -EADDRNOTAVAIL;
2043 } else {
2044 memcpy(netdev->dev_addr, skaddr->sa_data, netdev->addr_len);
2045 memcpy(adapter->hw.mac.addr, skaddr->sa_data, netdev->addr_len);
2046 pch_gbe_mac_mar_set(&adapter->hw, adapter->hw.mac.addr, 0);
2047 ret_val = 0;
2048 }
2049 pr_debug("ret_val : 0x%08x\n", ret_val);
2050 pr_debug("dev_addr : %pM\n", netdev->dev_addr);
2051 pr_debug("mac_addr : %pM\n", adapter->hw.mac.addr);
2052 pr_debug("MAC_ADR1AB reg : 0x%08x 0x%08x\n",
2053 ioread32(&adapter->hw.reg->mac_adr[0].high),
2054 ioread32(&adapter->hw.reg->mac_adr[0].low));
2055 return ret_val;
2056 }
2057
2058 /**
2059 * pch_gbe_change_mtu - Change the Maximum Transfer Unit
2060 * @netdev: Network interface device structure
2061 * @new_mtu: New value for maximum frame size
2062 * Returns
2063 * 0: Successfully
2064 * -EINVAL: Failed
2065 */
pch_gbe_change_mtu(struct net_device * netdev,int new_mtu)2066 static int pch_gbe_change_mtu(struct net_device *netdev, int new_mtu)
2067 {
2068 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2069 int max_frame;
2070 unsigned long old_rx_buffer_len = adapter->rx_buffer_len;
2071 int err;
2072
2073 max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2074 if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
2075 (max_frame > PCH_GBE_MAX_JUMBO_FRAME_SIZE)) {
2076 pr_err("Invalid MTU setting\n");
2077 return -EINVAL;
2078 }
2079 if (max_frame <= PCH_GBE_FRAME_SIZE_2048)
2080 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_2048;
2081 else if (max_frame <= PCH_GBE_FRAME_SIZE_4096)
2082 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_4096;
2083 else if (max_frame <= PCH_GBE_FRAME_SIZE_8192)
2084 adapter->rx_buffer_len = PCH_GBE_FRAME_SIZE_8192;
2085 else
2086 adapter->rx_buffer_len = PCH_GBE_MAX_RX_BUFFER_SIZE;
2087
2088 if (netif_running(netdev)) {
2089 pch_gbe_down(adapter);
2090 err = pch_gbe_up(adapter);
2091 if (err) {
2092 adapter->rx_buffer_len = old_rx_buffer_len;
2093 pch_gbe_up(adapter);
2094 return -ENOMEM;
2095 } else {
2096 netdev->mtu = new_mtu;
2097 adapter->hw.mac.max_frame_size = max_frame;
2098 }
2099 } else {
2100 pch_gbe_reset(adapter);
2101 netdev->mtu = new_mtu;
2102 adapter->hw.mac.max_frame_size = max_frame;
2103 }
2104
2105 pr_debug("max_frame : %d rx_buffer_len : %d mtu : %d max_frame_size : %d\n",
2106 max_frame, (u32) adapter->rx_buffer_len, netdev->mtu,
2107 adapter->hw.mac.max_frame_size);
2108 return 0;
2109 }
2110
2111 /**
2112 * pch_gbe_set_features - Reset device after features changed
2113 * @netdev: Network interface device structure
2114 * @features: New features
2115 * Returns
2116 * 0: HW state updated successfully
2117 */
pch_gbe_set_features(struct net_device * netdev,netdev_features_t features)2118 static int pch_gbe_set_features(struct net_device *netdev,
2119 netdev_features_t features)
2120 {
2121 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2122 netdev_features_t changed = features ^ netdev->features;
2123
2124 if (!(changed & NETIF_F_RXCSUM))
2125 return 0;
2126
2127 if (netif_running(netdev))
2128 pch_gbe_reinit_locked(adapter);
2129 else
2130 pch_gbe_reset(adapter);
2131
2132 return 0;
2133 }
2134
2135 /**
2136 * pch_gbe_ioctl - Controls register through a MII interface
2137 * @netdev: Network interface device structure
2138 * @ifr: Pointer to ifr structure
2139 * @cmd: Control command
2140 * Returns
2141 * 0: Successfully
2142 * Negative value: Failed
2143 */
pch_gbe_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)2144 static int pch_gbe_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2145 {
2146 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2147
2148 pr_debug("cmd : 0x%04x\n", cmd);
2149
2150 return generic_mii_ioctl(&adapter->mii, if_mii(ifr), cmd, NULL);
2151 }
2152
2153 /**
2154 * pch_gbe_tx_timeout - Respond to a Tx Hang
2155 * @netdev: Network interface device structure
2156 */
pch_gbe_tx_timeout(struct net_device * netdev)2157 static void pch_gbe_tx_timeout(struct net_device *netdev)
2158 {
2159 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2160
2161 /* Do the reset outside of interrupt context */
2162 adapter->stats.tx_timeout_count++;
2163 schedule_work(&adapter->reset_task);
2164 }
2165
2166 /**
2167 * pch_gbe_napi_poll - NAPI receive and transfer polling callback
2168 * @napi: Pointer of polling device struct
2169 * @budget: The maximum number of a packet
2170 * Returns
2171 * false: Exit the polling mode
2172 * true: Continue the polling mode
2173 */
pch_gbe_napi_poll(struct napi_struct * napi,int budget)2174 static int pch_gbe_napi_poll(struct napi_struct *napi, int budget)
2175 {
2176 struct pch_gbe_adapter *adapter =
2177 container_of(napi, struct pch_gbe_adapter, napi);
2178 int work_done = 0;
2179 bool poll_end_flag = false;
2180 bool cleaned = false;
2181 u32 int_en;
2182
2183 pr_debug("budget : %d\n", budget);
2184
2185 pch_gbe_clean_rx(adapter, adapter->rx_ring, &work_done, budget);
2186 cleaned = pch_gbe_clean_tx(adapter, adapter->tx_ring);
2187
2188 if (!cleaned)
2189 work_done = budget;
2190 /* If no Tx and not enough Rx work done,
2191 * exit the polling mode
2192 */
2193 if (work_done < budget)
2194 poll_end_flag = true;
2195
2196 if (poll_end_flag) {
2197 napi_complete(napi);
2198 if (adapter->rx_stop_flag) {
2199 adapter->rx_stop_flag = false;
2200 pch_gbe_start_receive(&adapter->hw);
2201 }
2202 pch_gbe_irq_enable(adapter);
2203 } else
2204 if (adapter->rx_stop_flag) {
2205 adapter->rx_stop_flag = false;
2206 pch_gbe_start_receive(&adapter->hw);
2207 int_en = ioread32(&adapter->hw.reg->INT_EN);
2208 iowrite32((int_en | PCH_GBE_INT_RX_FIFO_ERR),
2209 &adapter->hw.reg->INT_EN);
2210 }
2211
2212 pr_debug("poll_end_flag : %d work_done : %d budget : %d\n",
2213 poll_end_flag, work_done, budget);
2214
2215 return work_done;
2216 }
2217
2218 #ifdef CONFIG_NET_POLL_CONTROLLER
2219 /**
2220 * pch_gbe_netpoll - Used by things like netconsole to send skbs
2221 * @netdev: Network interface device structure
2222 */
pch_gbe_netpoll(struct net_device * netdev)2223 static void pch_gbe_netpoll(struct net_device *netdev)
2224 {
2225 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2226
2227 disable_irq(adapter->pdev->irq);
2228 pch_gbe_intr(adapter->pdev->irq, netdev);
2229 enable_irq(adapter->pdev->irq);
2230 }
2231 #endif
2232
2233 static const struct net_device_ops pch_gbe_netdev_ops = {
2234 .ndo_open = pch_gbe_open,
2235 .ndo_stop = pch_gbe_stop,
2236 .ndo_start_xmit = pch_gbe_xmit_frame,
2237 .ndo_get_stats = pch_gbe_get_stats,
2238 .ndo_set_mac_address = pch_gbe_set_mac,
2239 .ndo_tx_timeout = pch_gbe_tx_timeout,
2240 .ndo_change_mtu = pch_gbe_change_mtu,
2241 .ndo_set_features = pch_gbe_set_features,
2242 .ndo_do_ioctl = pch_gbe_ioctl,
2243 .ndo_set_rx_mode = pch_gbe_set_multi,
2244 #ifdef CONFIG_NET_POLL_CONTROLLER
2245 .ndo_poll_controller = pch_gbe_netpoll,
2246 #endif
2247 };
2248
pch_gbe_io_error_detected(struct pci_dev * pdev,pci_channel_state_t state)2249 static pci_ers_result_t pch_gbe_io_error_detected(struct pci_dev *pdev,
2250 pci_channel_state_t state)
2251 {
2252 struct net_device *netdev = pci_get_drvdata(pdev);
2253 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2254
2255 netif_device_detach(netdev);
2256 if (netif_running(netdev))
2257 pch_gbe_down(adapter);
2258 pci_disable_device(pdev);
2259 /* Request a slot slot reset. */
2260 return PCI_ERS_RESULT_NEED_RESET;
2261 }
2262
pch_gbe_io_slot_reset(struct pci_dev * pdev)2263 static pci_ers_result_t pch_gbe_io_slot_reset(struct pci_dev *pdev)
2264 {
2265 struct net_device *netdev = pci_get_drvdata(pdev);
2266 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2267 struct pch_gbe_hw *hw = &adapter->hw;
2268
2269 if (pci_enable_device(pdev)) {
2270 pr_err("Cannot re-enable PCI device after reset\n");
2271 return PCI_ERS_RESULT_DISCONNECT;
2272 }
2273 pci_set_master(pdev);
2274 pci_enable_wake(pdev, PCI_D0, 0);
2275 pch_gbe_hal_power_up_phy(hw);
2276 pch_gbe_reset(adapter);
2277 /* Clear wake up status */
2278 pch_gbe_mac_set_wol_event(hw, 0);
2279
2280 return PCI_ERS_RESULT_RECOVERED;
2281 }
2282
pch_gbe_io_resume(struct pci_dev * pdev)2283 static void pch_gbe_io_resume(struct pci_dev *pdev)
2284 {
2285 struct net_device *netdev = pci_get_drvdata(pdev);
2286 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2287
2288 if (netif_running(netdev)) {
2289 if (pch_gbe_up(adapter)) {
2290 pr_debug("can't bring device back up after reset\n");
2291 return;
2292 }
2293 }
2294 netif_device_attach(netdev);
2295 }
2296
__pch_gbe_suspend(struct pci_dev * pdev)2297 static int __pch_gbe_suspend(struct pci_dev *pdev)
2298 {
2299 struct net_device *netdev = pci_get_drvdata(pdev);
2300 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2301 struct pch_gbe_hw *hw = &adapter->hw;
2302 u32 wufc = adapter->wake_up_evt;
2303 int retval = 0;
2304
2305 netif_device_detach(netdev);
2306 if (netif_running(netdev))
2307 pch_gbe_down(adapter);
2308 if (wufc) {
2309 pch_gbe_set_multi(netdev);
2310 pch_gbe_setup_rctl(adapter);
2311 pch_gbe_configure_rx(adapter);
2312 pch_gbe_set_rgmii_ctrl(adapter, hw->mac.link_speed,
2313 hw->mac.link_duplex);
2314 pch_gbe_set_mode(adapter, hw->mac.link_speed,
2315 hw->mac.link_duplex);
2316 pch_gbe_mac_set_wol_event(hw, wufc);
2317 pci_disable_device(pdev);
2318 } else {
2319 pch_gbe_hal_power_down_phy(hw);
2320 pch_gbe_mac_set_wol_event(hw, wufc);
2321 pci_disable_device(pdev);
2322 }
2323 return retval;
2324 }
2325
2326 #ifdef CONFIG_PM
pch_gbe_suspend(struct device * device)2327 static int pch_gbe_suspend(struct device *device)
2328 {
2329 struct pci_dev *pdev = to_pci_dev(device);
2330
2331 return __pch_gbe_suspend(pdev);
2332 }
2333
pch_gbe_resume(struct device * device)2334 static int pch_gbe_resume(struct device *device)
2335 {
2336 struct pci_dev *pdev = to_pci_dev(device);
2337 struct net_device *netdev = pci_get_drvdata(pdev);
2338 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2339 struct pch_gbe_hw *hw = &adapter->hw;
2340 u32 err;
2341
2342 err = pci_enable_device(pdev);
2343 if (err) {
2344 pr_err("Cannot enable PCI device from suspend\n");
2345 return err;
2346 }
2347 pci_set_master(pdev);
2348 pch_gbe_hal_power_up_phy(hw);
2349 pch_gbe_reset(adapter);
2350 /* Clear wake on lan control and status */
2351 pch_gbe_mac_set_wol_event(hw, 0);
2352
2353 if (netif_running(netdev))
2354 pch_gbe_up(adapter);
2355 netif_device_attach(netdev);
2356
2357 return 0;
2358 }
2359 #endif /* CONFIG_PM */
2360
pch_gbe_shutdown(struct pci_dev * pdev)2361 static void pch_gbe_shutdown(struct pci_dev *pdev)
2362 {
2363 __pch_gbe_suspend(pdev);
2364 if (system_state == SYSTEM_POWER_OFF) {
2365 pci_wake_from_d3(pdev, true);
2366 pci_set_power_state(pdev, PCI_D3hot);
2367 }
2368 }
2369
pch_gbe_remove(struct pci_dev * pdev)2370 static void pch_gbe_remove(struct pci_dev *pdev)
2371 {
2372 struct net_device *netdev = pci_get_drvdata(pdev);
2373 struct pch_gbe_adapter *adapter = netdev_priv(netdev);
2374
2375 cancel_work_sync(&adapter->reset_task);
2376 unregister_netdev(netdev);
2377
2378 pch_gbe_hal_phy_hw_reset(&adapter->hw);
2379
2380 kfree(adapter->tx_ring);
2381 kfree(adapter->rx_ring);
2382
2383 iounmap(adapter->hw.reg);
2384 pci_release_regions(pdev);
2385 free_netdev(netdev);
2386 pci_disable_device(pdev);
2387 }
2388
pch_gbe_probe(struct pci_dev * pdev,const struct pci_device_id * pci_id)2389 static int pch_gbe_probe(struct pci_dev *pdev,
2390 const struct pci_device_id *pci_id)
2391 {
2392 struct net_device *netdev;
2393 struct pch_gbe_adapter *adapter;
2394 int ret;
2395
2396 ret = pci_enable_device(pdev);
2397 if (ret)
2398 return ret;
2399
2400 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))
2401 || pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
2402 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2403 if (ret) {
2404 ret = pci_set_consistent_dma_mask(pdev,
2405 DMA_BIT_MASK(32));
2406 if (ret) {
2407 dev_err(&pdev->dev, "ERR: No usable DMA "
2408 "configuration, aborting\n");
2409 goto err_disable_device;
2410 }
2411 }
2412 }
2413
2414 ret = pci_request_regions(pdev, KBUILD_MODNAME);
2415 if (ret) {
2416 dev_err(&pdev->dev,
2417 "ERR: Can't reserve PCI I/O and memory resources\n");
2418 goto err_disable_device;
2419 }
2420 pci_set_master(pdev);
2421
2422 netdev = alloc_etherdev((int)sizeof(struct pch_gbe_adapter));
2423 if (!netdev) {
2424 ret = -ENOMEM;
2425 dev_err(&pdev->dev,
2426 "ERR: Can't allocate and set up an Ethernet device\n");
2427 goto err_release_pci;
2428 }
2429 SET_NETDEV_DEV(netdev, &pdev->dev);
2430
2431 pci_set_drvdata(pdev, netdev);
2432 adapter = netdev_priv(netdev);
2433 adapter->netdev = netdev;
2434 adapter->pdev = pdev;
2435 adapter->hw.back = adapter;
2436 adapter->hw.reg = pci_iomap(pdev, PCH_GBE_PCI_BAR, 0);
2437 if (!adapter->hw.reg) {
2438 ret = -EIO;
2439 dev_err(&pdev->dev, "Can't ioremap\n");
2440 goto err_free_netdev;
2441 }
2442
2443 netdev->netdev_ops = &pch_gbe_netdev_ops;
2444 netdev->watchdog_timeo = PCH_GBE_WATCHDOG_PERIOD;
2445 netif_napi_add(netdev, &adapter->napi,
2446 pch_gbe_napi_poll, PCH_GBE_RX_WEIGHT);
2447 netdev->hw_features = NETIF_F_RXCSUM |
2448 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2449 netdev->features = netdev->hw_features;
2450 pch_gbe_set_ethtool_ops(netdev);
2451
2452 pch_gbe_mac_load_mac_addr(&adapter->hw);
2453 pch_gbe_mac_reset_hw(&adapter->hw);
2454
2455 /* setup the private structure */
2456 ret = pch_gbe_sw_init(adapter);
2457 if (ret)
2458 goto err_iounmap;
2459
2460 /* Initialize PHY */
2461 ret = pch_gbe_init_phy(adapter);
2462 if (ret) {
2463 dev_err(&pdev->dev, "PHY initialize error\n");
2464 goto err_free_adapter;
2465 }
2466 pch_gbe_hal_get_bus_info(&adapter->hw);
2467
2468 /* Read the MAC address. and store to the private data */
2469 ret = pch_gbe_hal_read_mac_addr(&adapter->hw);
2470 if (ret) {
2471 dev_err(&pdev->dev, "MAC address Read Error\n");
2472 goto err_free_adapter;
2473 }
2474
2475 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2476 if (!is_valid_ether_addr(netdev->dev_addr)) {
2477 /*
2478 * If the MAC is invalid (or just missing), display a warning
2479 * but do not abort setting up the device. pch_gbe_up will
2480 * prevent the interface from being brought up until a valid MAC
2481 * is set.
2482 */
2483 dev_err(&pdev->dev, "Invalid MAC address, "
2484 "interface disabled.\n");
2485 }
2486 setup_timer(&adapter->watchdog_timer, pch_gbe_watchdog,
2487 (unsigned long)adapter);
2488
2489 INIT_WORK(&adapter->reset_task, pch_gbe_reset_task);
2490
2491 pch_gbe_check_options(adapter);
2492
2493 /* initialize the wol settings based on the eeprom settings */
2494 adapter->wake_up_evt = PCH_GBE_WL_INIT_SETTING;
2495 dev_info(&pdev->dev, "MAC address : %pM\n", netdev->dev_addr);
2496
2497 /* reset the hardware with the new settings */
2498 pch_gbe_reset(adapter);
2499
2500 ret = register_netdev(netdev);
2501 if (ret)
2502 goto err_free_adapter;
2503 /* tell the stack to leave us alone until pch_gbe_open() is called */
2504 netif_carrier_off(netdev);
2505 netif_stop_queue(netdev);
2506
2507 dev_dbg(&pdev->dev, "OKIsemi(R) PCH Network Connection\n");
2508
2509 device_set_wakeup_enable(&pdev->dev, 1);
2510 return 0;
2511
2512 err_free_adapter:
2513 pch_gbe_hal_phy_hw_reset(&adapter->hw);
2514 kfree(adapter->tx_ring);
2515 kfree(adapter->rx_ring);
2516 err_iounmap:
2517 iounmap(adapter->hw.reg);
2518 err_free_netdev:
2519 free_netdev(netdev);
2520 err_release_pci:
2521 pci_release_regions(pdev);
2522 err_disable_device:
2523 pci_disable_device(pdev);
2524 return ret;
2525 }
2526
2527 static DEFINE_PCI_DEVICE_TABLE(pch_gbe_pcidev_id) = {
2528 {.vendor = PCI_VENDOR_ID_INTEL,
2529 .device = PCI_DEVICE_ID_INTEL_IOH1_GBE,
2530 .subvendor = PCI_ANY_ID,
2531 .subdevice = PCI_ANY_ID,
2532 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2533 .class_mask = (0xFFFF00)
2534 },
2535 {.vendor = PCI_VENDOR_ID_ROHM,
2536 .device = PCI_DEVICE_ID_ROHM_ML7223_GBE,
2537 .subvendor = PCI_ANY_ID,
2538 .subdevice = PCI_ANY_ID,
2539 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2540 .class_mask = (0xFFFF00)
2541 },
2542 {.vendor = PCI_VENDOR_ID_ROHM,
2543 .device = PCI_DEVICE_ID_ROHM_ML7831_GBE,
2544 .subvendor = PCI_ANY_ID,
2545 .subdevice = PCI_ANY_ID,
2546 .class = (PCI_CLASS_NETWORK_ETHERNET << 8),
2547 .class_mask = (0xFFFF00)
2548 },
2549 /* required last entry */
2550 {0}
2551 };
2552
2553 #ifdef CONFIG_PM
2554 static const struct dev_pm_ops pch_gbe_pm_ops = {
2555 .suspend = pch_gbe_suspend,
2556 .resume = pch_gbe_resume,
2557 .freeze = pch_gbe_suspend,
2558 .thaw = pch_gbe_resume,
2559 .poweroff = pch_gbe_suspend,
2560 .restore = pch_gbe_resume,
2561 };
2562 #endif
2563
2564 static struct pci_error_handlers pch_gbe_err_handler = {
2565 .error_detected = pch_gbe_io_error_detected,
2566 .slot_reset = pch_gbe_io_slot_reset,
2567 .resume = pch_gbe_io_resume
2568 };
2569
2570 static struct pci_driver pch_gbe_driver = {
2571 .name = KBUILD_MODNAME,
2572 .id_table = pch_gbe_pcidev_id,
2573 .probe = pch_gbe_probe,
2574 .remove = pch_gbe_remove,
2575 #ifdef CONFIG_PM
2576 .driver.pm = &pch_gbe_pm_ops,
2577 #endif
2578 .shutdown = pch_gbe_shutdown,
2579 .err_handler = &pch_gbe_err_handler
2580 };
2581
2582
pch_gbe_init_module(void)2583 static int __init pch_gbe_init_module(void)
2584 {
2585 int ret;
2586
2587 ret = pci_register_driver(&pch_gbe_driver);
2588 if (copybreak != PCH_GBE_COPYBREAK_DEFAULT) {
2589 if (copybreak == 0) {
2590 pr_info("copybreak disabled\n");
2591 } else {
2592 pr_info("copybreak enabled for packets <= %u bytes\n",
2593 copybreak);
2594 }
2595 }
2596 return ret;
2597 }
2598
pch_gbe_exit_module(void)2599 static void __exit pch_gbe_exit_module(void)
2600 {
2601 pci_unregister_driver(&pch_gbe_driver);
2602 }
2603
2604 module_init(pch_gbe_init_module);
2605 module_exit(pch_gbe_exit_module);
2606
2607 MODULE_DESCRIPTION("EG20T PCH Gigabit ethernet Driver");
2608 MODULE_AUTHOR("OKI SEMICONDUCTOR, <toshiharu-linux@dsn.okisemi.com>");
2609 MODULE_LICENSE("GPL");
2610 MODULE_VERSION(DRV_VERSION);
2611 MODULE_DEVICE_TABLE(pci, pch_gbe_pcidev_id);
2612
2613 module_param(copybreak, uint, 0644);
2614 MODULE_PARM_DESC(copybreak,
2615 "Maximum size of packet that is copied to a new buffer on receive");
2616
2617 /* pch_gbe_main.c */
2618