blob: 9b358f61ed7fb4c7ba612b644665b3d221c9a785 [file] [log] [blame]
Francois Romieu1202d6f2007-09-17 17:13:55 -07001/*
2 * ipg.c: Device Driver for the IP1000 Gigabit Ethernet Adapter
3 *
4 * Copyright (C) 2003, 2007 IC Plus Corp
5 *
6 * Original Author:
7 *
8 * Craig Rich
9 * Sundance Technology, Inc.
10 * www.sundanceti.com
11 * craig_rich@sundanceti.com
12 *
13 * Current Maintainer:
14 *
15 * Sorbica Shieh.
16 * http://www.icplus.com.tw
17 * sorbica@icplus.com.tw
18 *
19 * Jesse Huang
20 * http://www.icplus.com.tw
21 * jesse@icplus.com.tw
22 */
23#include <linux/crc32.h>
24#include <linux/ethtool.h>
25#include <linux/mii.h>
26#include <linux/mutex.h>
27
trem1dad9392007-10-02 14:04:38 -070028#include <asm/div64.h>
29
Francois Romieu1202d6f2007-09-17 17:13:55 -070030#define IPG_RX_RING_BYTES (sizeof(struct ipg_rx) * IPG_RFDLIST_LENGTH)
31#define IPG_TX_RING_BYTES (sizeof(struct ipg_tx) * IPG_TFDLIST_LENGTH)
32#define IPG_RESET_MASK \
33 (IPG_AC_GLOBAL_RESET | IPG_AC_RX_RESET | IPG_AC_TX_RESET | \
34 IPG_AC_DMA | IPG_AC_FIFO | IPG_AC_NETWORK | IPG_AC_HOST | \
35 IPG_AC_AUTO_INIT)
36
Pekka Enberg8da5bb72007-11-30 09:55:43 +020037#define ipg_w32(val32, reg) iowrite32((val32), ioaddr + (reg))
38#define ipg_w16(val16, reg) iowrite16((val16), ioaddr + (reg))
39#define ipg_w8(val8, reg) iowrite8((val8), ioaddr + (reg))
Francois Romieu1202d6f2007-09-17 17:13:55 -070040
41#define ipg_r32(reg) ioread32(ioaddr + (reg))
42#define ipg_r16(reg) ioread16(ioaddr + (reg))
43#define ipg_r8(reg) ioread8(ioaddr + (reg))
44
45#define JUMBO_FRAME_4k_ONLY
46enum {
47 netdev_io_size = 128
48};
49
50#include "ipg.h"
51#define DRV_NAME "ipg"
52
53MODULE_AUTHOR("IC Plus Corp. 2003");
Pekka Enberg1662e4b2007-11-30 09:54:06 +020054MODULE_DESCRIPTION("IC Plus IP1000 Gigabit Ethernet Adapter Linux Driver");
Francois Romieu1202d6f2007-09-17 17:13:55 -070055MODULE_LICENSE("GPL");
56
Pekka Enberg8da5bb72007-11-30 09:55:43 +020057/*
58 * Variable record -- index by leading revision/length
59 * Revision/Length(=N*4), Address1, Data1, Address2, Data2,...,AddressN,DataN
60 */
Adrian Bunk96fd74b2007-10-24 18:23:19 +020061static unsigned short DefaultPhyParam[] = {
Pekka Enberg8da5bb72007-11-30 09:55:43 +020062 /* 11/12/03 IP1000A v1-3 rev=0x40 */
Adrian Bunk96fd74b2007-10-24 18:23:19 +020063 /*--------------------------------------------------------------------------
64 (0x4000|(15*4)), 31, 0x0001, 27, 0x01e0, 31, 0x0002, 22, 0x85bd, 24, 0xfff2,
65 27, 0x0c10, 28, 0x0c10, 29, 0x2c10, 31, 0x0003, 23, 0x92f6,
66 31, 0x0000, 23, 0x003d, 30, 0x00de, 20, 0x20e7, 9, 0x0700,
67 --------------------------------------------------------------------------*/
Pekka Enberg8da5bb72007-11-30 09:55:43 +020068 /* 12/17/03 IP1000A v1-4 rev=0x40 */
Adrian Bunk96fd74b2007-10-24 18:23:19 +020069 (0x4000 | (07 * 4)), 31, 0x0001, 27, 0x01e0, 31, 0x0002, 27, 0xeb8e, 31,
70 0x0000,
71 30, 0x005e, 9, 0x0700,
Pekka Enberg8da5bb72007-11-30 09:55:43 +020072 /* 01/09/04 IP1000A v1-5 rev=0x41 */
Adrian Bunk96fd74b2007-10-24 18:23:19 +020073 (0x4100 | (07 * 4)), 31, 0x0001, 27, 0x01e0, 31, 0x0002, 27, 0xeb8e, 31,
74 0x0000,
75 30, 0x005e, 9, 0x0700,
76 0x0000
77};
78
Francois Romieu1202d6f2007-09-17 17:13:55 -070079static const char *ipg_brand_name[] = {
80 "IC PLUS IP1000 1000/100/10 based NIC",
81 "Sundance Technology ST2021 based NIC",
82 "Tamarack Microelectronics TC9020/9021 based NIC",
83 "Tamarack Microelectronics TC9020/9021 based NIC",
84 "D-Link NIC",
85 "D-Link NIC IP1000A"
86};
87
88static struct pci_device_id ipg_pci_tbl[] __devinitdata = {
89 { PCI_VDEVICE(SUNDANCE, 0x1023), 0 },
90 { PCI_VDEVICE(SUNDANCE, 0x2021), 1 },
91 { PCI_VDEVICE(SUNDANCE, 0x1021), 2 },
92 { PCI_VDEVICE(DLINK, 0x9021), 3 },
93 { PCI_VDEVICE(DLINK, 0x4000), 4 },
94 { PCI_VDEVICE(DLINK, 0x4020), 5 },
95 { 0, }
96};
97
98MODULE_DEVICE_TABLE(pci, ipg_pci_tbl);
99
100static inline void __iomem *ipg_ioaddr(struct net_device *dev)
101{
102 struct ipg_nic_private *sp = netdev_priv(dev);
103 return sp->ioaddr;
104}
105
106#ifdef IPG_DEBUG
107static void ipg_dump_rfdlist(struct net_device *dev)
108{
109 struct ipg_nic_private *sp = netdev_priv(dev);
110 void __iomem *ioaddr = sp->ioaddr;
111 unsigned int i;
112 u32 offset;
113
114 IPG_DEBUG_MSG("_dump_rfdlist\n");
115
116 printk(KERN_INFO "rx_current = %2.2x\n", sp->rx_current);
117 printk(KERN_INFO "rx_dirty = %2.2x\n", sp->rx_dirty);
118 printk(KERN_INFO "RFDList start address = %16.16lx\n",
119 (unsigned long) sp->rxd_map);
120 printk(KERN_INFO "RFDListPtr register = %8.8x%8.8x\n",
121 ipg_r32(IPG_RFDLISTPTR1), ipg_r32(IPG_RFDLISTPTR0));
122
123 for (i = 0; i < IPG_RFDLIST_LENGTH; i++) {
124 offset = (u32) &sp->rxd[i].next_desc - (u32) sp->rxd;
125 printk(KERN_INFO "%2.2x %4.4x RFDNextPtr = %16.16lx\n", i,
126 offset, (unsigned long) sp->rxd[i].next_desc);
127 offset = (u32) &sp->rxd[i].rfs - (u32) sp->rxd;
128 printk(KERN_INFO "%2.2x %4.4x RFS = %16.16lx\n", i,
129 offset, (unsigned long) sp->rxd[i].rfs);
130 offset = (u32) &sp->rxd[i].frag_info - (u32) sp->rxd;
131 printk(KERN_INFO "%2.2x %4.4x frag_info = %16.16lx\n", i,
132 offset, (unsigned long) sp->rxd[i].frag_info);
133 }
134}
135
136static void ipg_dump_tfdlist(struct net_device *dev)
137{
138 struct ipg_nic_private *sp = netdev_priv(dev);
139 void __iomem *ioaddr = sp->ioaddr;
140 unsigned int i;
141 u32 offset;
142
143 IPG_DEBUG_MSG("_dump_tfdlist\n");
144
145 printk(KERN_INFO "tx_current = %2.2x\n", sp->tx_current);
146 printk(KERN_INFO "tx_dirty = %2.2x\n", sp->tx_dirty);
147 printk(KERN_INFO "TFDList start address = %16.16lx\n",
148 (unsigned long) sp->txd_map);
149 printk(KERN_INFO "TFDListPtr register = %8.8x%8.8x\n",
150 ipg_r32(IPG_TFDLISTPTR1), ipg_r32(IPG_TFDLISTPTR0));
151
152 for (i = 0; i < IPG_TFDLIST_LENGTH; i++) {
153 offset = (u32) &sp->txd[i].next_desc - (u32) sp->txd;
154 printk(KERN_INFO "%2.2x %4.4x TFDNextPtr = %16.16lx\n", i,
155 offset, (unsigned long) sp->txd[i].next_desc);
156
157 offset = (u32) &sp->txd[i].tfc - (u32) sp->txd;
158 printk(KERN_INFO "%2.2x %4.4x TFC = %16.16lx\n", i,
159 offset, (unsigned long) sp->txd[i].tfc);
160 offset = (u32) &sp->txd[i].frag_info - (u32) sp->txd;
161 printk(KERN_INFO "%2.2x %4.4x frag_info = %16.16lx\n", i,
162 offset, (unsigned long) sp->txd[i].frag_info);
163 }
164}
165#endif
166
167static void ipg_write_phy_ctl(void __iomem *ioaddr, u8 data)
168{
169 ipg_w8(IPG_PC_RSVD_MASK & data, PHY_CTRL);
170 ndelay(IPG_PC_PHYCTRLWAIT_NS);
171}
172
173static void ipg_drive_phy_ctl_low_high(void __iomem *ioaddr, u8 data)
174{
175 ipg_write_phy_ctl(ioaddr, IPG_PC_MGMTCLK_LO | data);
176 ipg_write_phy_ctl(ioaddr, IPG_PC_MGMTCLK_HI | data);
177}
178
179static void send_three_state(void __iomem *ioaddr, u8 phyctrlpolarity)
180{
181 phyctrlpolarity |= (IPG_PC_MGMTDATA & 0) | IPG_PC_MGMTDIR;
182
183 ipg_drive_phy_ctl_low_high(ioaddr, phyctrlpolarity);
184}
185
186static void send_end(void __iomem *ioaddr, u8 phyctrlpolarity)
187{
188 ipg_w8((IPG_PC_MGMTCLK_LO | (IPG_PC_MGMTDATA & 0) | IPG_PC_MGMTDIR |
189 phyctrlpolarity) & IPG_PC_RSVD_MASK, PHY_CTRL);
190}
191
Pekka Enberg8da5bb72007-11-30 09:55:43 +0200192static u16 read_phy_bit(void __iomem *ioaddr, u8 phyctrlpolarity)
Francois Romieu1202d6f2007-09-17 17:13:55 -0700193{
194 u16 bit_data;
195
196 ipg_write_phy_ctl(ioaddr, IPG_PC_MGMTCLK_LO | phyctrlpolarity);
197
198 bit_data = ((ipg_r8(PHY_CTRL) & IPG_PC_MGMTDATA) >> 1) & 1;
199
200 ipg_write_phy_ctl(ioaddr, IPG_PC_MGMTCLK_HI | phyctrlpolarity);
201
202 return bit_data;
203}
204
205/*
206 * Read a register from the Physical Layer device located
207 * on the IPG NIC, using the IPG PHYCTRL register.
208 */
Pekka Enberg8da5bb72007-11-30 09:55:43 +0200209static int mdio_read(struct net_device *dev, int phy_id, int phy_reg)
Francois Romieu1202d6f2007-09-17 17:13:55 -0700210{
211 void __iomem *ioaddr = ipg_ioaddr(dev);
212 /*
213 * The GMII mangement frame structure for a read is as follows:
214 *
215 * |Preamble|st|op|phyad|regad|ta| data |idle|
216 * |< 32 1s>|01|10|AAAAA|RRRRR|z0|DDDDDDDDDDDDDDDD|z |
217 *
218 * <32 1s> = 32 consecutive logic 1 values
219 * A = bit of Physical Layer device address (MSB first)
220 * R = bit of register address (MSB first)
221 * z = High impedance state
222 * D = bit of read data (MSB first)
223 *
224 * Transmission order is 'Preamble' field first, bits transmitted
225 * left to right (first to last).
226 */
227 struct {
228 u32 field;
229 unsigned int len;
230 } p[] = {
231 { GMII_PREAMBLE, 32 }, /* Preamble */
232 { GMII_ST, 2 }, /* ST */
233 { GMII_READ, 2 }, /* OP */
234 { phy_id, 5 }, /* PHYAD */
235 { phy_reg, 5 }, /* REGAD */
236 { 0x0000, 2 }, /* TA */
237 { 0x0000, 16 }, /* DATA */
238 { 0x0000, 1 } /* IDLE */
239 };
240 unsigned int i, j;
241 u8 polarity, data;
242
243 polarity = ipg_r8(PHY_CTRL);
244 polarity &= (IPG_PC_DUPLEX_POLARITY | IPG_PC_LINK_POLARITY);
245
246 /* Create the Preamble, ST, OP, PHYAD, and REGAD field. */
247 for (j = 0; j < 5; j++) {
248 for (i = 0; i < p[j].len; i++) {
249 /* For each variable length field, the MSB must be
250 * transmitted first. Rotate through the field bits,
251 * starting with the MSB, and move each bit into the
252 * the 1st (2^1) bit position (this is the bit position
253 * corresponding to the MgmtData bit of the PhyCtrl
254 * register for the IPG).
255 *
256 * Example: ST = 01;
257 *
258 * First write a '0' to bit 1 of the PhyCtrl
259 * register, then write a '1' to bit 1 of the
260 * PhyCtrl register.
261 *
262 * To do this, right shift the MSB of ST by the value:
263 * [field length - 1 - #ST bits already written]
264 * then left shift this result by 1.
265 */
266 data = (p[j].field >> (p[j].len - 1 - i)) << 1;
267 data &= IPG_PC_MGMTDATA;
268 data |= polarity | IPG_PC_MGMTDIR;
269
270 ipg_drive_phy_ctl_low_high(ioaddr, data);
271 }
272 }
273
274 send_three_state(ioaddr, polarity);
275
276 read_phy_bit(ioaddr, polarity);
277
278 /*
279 * For a read cycle, the bits for the next two fields (TA and
280 * DATA) are driven by the PHY (the IPG reads these bits).
281 */
282 for (i = 0; i < p[6].len; i++) {
283 p[6].field |=
284 (read_phy_bit(ioaddr, polarity) << (p[6].len - 1 - i));
285 }
286
287 send_three_state(ioaddr, polarity);
288 send_three_state(ioaddr, polarity);
289 send_three_state(ioaddr, polarity);
290 send_end(ioaddr, polarity);
291
292 /* Return the value of the DATA field. */
293 return p[6].field;
294}
295
296/*
297 * Write to a register from the Physical Layer device located
298 * on the IPG NIC, using the IPG PHYCTRL register.
299 */
300static void mdio_write(struct net_device *dev, int phy_id, int phy_reg, int val)
301{
302 void __iomem *ioaddr = ipg_ioaddr(dev);
303 /*
304 * The GMII mangement frame structure for a read is as follows:
305 *
306 * |Preamble|st|op|phyad|regad|ta| data |idle|
307 * |< 32 1s>|01|10|AAAAA|RRRRR|z0|DDDDDDDDDDDDDDDD|z |
308 *
309 * <32 1s> = 32 consecutive logic 1 values
310 * A = bit of Physical Layer device address (MSB first)
311 * R = bit of register address (MSB first)
312 * z = High impedance state
313 * D = bit of write data (MSB first)
314 *
315 * Transmission order is 'Preamble' field first, bits transmitted
316 * left to right (first to last).
317 */
318 struct {
319 u32 field;
320 unsigned int len;
321 } p[] = {
322 { GMII_PREAMBLE, 32 }, /* Preamble */
323 { GMII_ST, 2 }, /* ST */
324 { GMII_WRITE, 2 }, /* OP */
325 { phy_id, 5 }, /* PHYAD */
326 { phy_reg, 5 }, /* REGAD */
327 { 0x0002, 2 }, /* TA */
328 { val & 0xffff, 16 }, /* DATA */
329 { 0x0000, 1 } /* IDLE */
330 };
331 unsigned int i, j;
332 u8 polarity, data;
333
334 polarity = ipg_r8(PHY_CTRL);
335 polarity &= (IPG_PC_DUPLEX_POLARITY | IPG_PC_LINK_POLARITY);
336
337 /* Create the Preamble, ST, OP, PHYAD, and REGAD field. */
338 for (j = 0; j < 7; j++) {
339 for (i = 0; i < p[j].len; i++) {
340 /* For each variable length field, the MSB must be
341 * transmitted first. Rotate through the field bits,
342 * starting with the MSB, and move each bit into the
343 * the 1st (2^1) bit position (this is the bit position
344 * corresponding to the MgmtData bit of the PhyCtrl
345 * register for the IPG).
346 *
347 * Example: ST = 01;
348 *
349 * First write a '0' to bit 1 of the PhyCtrl
350 * register, then write a '1' to bit 1 of the
351 * PhyCtrl register.
352 *
353 * To do this, right shift the MSB of ST by the value:
354 * [field length - 1 - #ST bits already written]
355 * then left shift this result by 1.
356 */
357 data = (p[j].field >> (p[j].len - 1 - i)) << 1;
358 data &= IPG_PC_MGMTDATA;
359 data |= polarity | IPG_PC_MGMTDIR;
360
361 ipg_drive_phy_ctl_low_high(ioaddr, data);
362 }
363 }
364
365 /* The last cycle is a tri-state, so read from the PHY. */
366 for (j = 7; j < 8; j++) {
367 for (i = 0; i < p[j].len; i++) {
368 ipg_write_phy_ctl(ioaddr, IPG_PC_MGMTCLK_LO | polarity);
369
370 p[j].field |= ((ipg_r8(PHY_CTRL) &
371 IPG_PC_MGMTDATA) >> 1) << (p[j].len - 1 - i);
372
373 ipg_write_phy_ctl(ioaddr, IPG_PC_MGMTCLK_HI | polarity);
374 }
375 }
376}
377
Francois Romieu1202d6f2007-09-17 17:13:55 -0700378static void ipg_set_led_mode(struct net_device *dev)
379{
380 struct ipg_nic_private *sp = netdev_priv(dev);
381 void __iomem *ioaddr = sp->ioaddr;
382 u32 mode;
383
384 mode = ipg_r32(ASIC_CTRL);
385 mode &= ~(IPG_AC_LED_MODE_BIT_1 | IPG_AC_LED_MODE | IPG_AC_LED_SPEED);
386
Pekka Enberg9893ba12008-01-24 02:01:17 -0800387 if ((sp->led_mode & 0x03) > 1)
Francois Romieu1202d6f2007-09-17 17:13:55 -0700388 mode |= IPG_AC_LED_MODE_BIT_1; /* Write Asic Control Bit 29 */
389
Pekka Enberg9893ba12008-01-24 02:01:17 -0800390 if ((sp->led_mode & 0x01) == 1)
Francois Romieu1202d6f2007-09-17 17:13:55 -0700391 mode |= IPG_AC_LED_MODE; /* Write Asic Control Bit 14 */
392
Pekka Enberg9893ba12008-01-24 02:01:17 -0800393 if ((sp->led_mode & 0x08) == 8)
Francois Romieu1202d6f2007-09-17 17:13:55 -0700394 mode |= IPG_AC_LED_SPEED; /* Write Asic Control Bit 27 */
395
396 ipg_w32(mode, ASIC_CTRL);
397}
398
Francois Romieu1202d6f2007-09-17 17:13:55 -0700399static void ipg_set_phy_set(struct net_device *dev)
400{
401 struct ipg_nic_private *sp = netdev_priv(dev);
402 void __iomem *ioaddr = sp->ioaddr;
403 int physet;
404
405 physet = ipg_r8(PHY_SET);
406 physet &= ~(IPG_PS_MEM_LENB9B | IPG_PS_MEM_LEN9 | IPG_PS_NON_COMPDET);
Pekka Enberg9893ba12008-01-24 02:01:17 -0800407 physet |= ((sp->led_mode & 0x70) >> 4);
Francois Romieu1202d6f2007-09-17 17:13:55 -0700408 ipg_w8(physet, PHY_SET);
409}
410
411static int ipg_reset(struct net_device *dev, u32 resetflags)
412{
413 /* Assert functional resets via the IPG AsicCtrl
414 * register as specified by the 'resetflags' input
415 * parameter.
416 */
Pekka Enbergdea4a872007-11-30 09:54:51 +0200417 void __iomem *ioaddr = ipg_ioaddr(dev);
Francois Romieu1202d6f2007-09-17 17:13:55 -0700418 unsigned int timeout_count = 0;
419
420 IPG_DEBUG_MSG("_reset\n");
421
422 ipg_w32(ipg_r32(ASIC_CTRL) | resetflags, ASIC_CTRL);
423
424 /* Delay added to account for problem with 10Mbps reset. */
425 mdelay(IPG_AC_RESETWAIT);
426
427 while (IPG_AC_RESET_BUSY & ipg_r32(ASIC_CTRL)) {
428 mdelay(IPG_AC_RESETWAIT);
429 if (++timeout_count > IPG_AC_RESET_TIMEOUT)
430 return -ETIME;
431 }
Pekka Enbergdea4a872007-11-30 09:54:51 +0200432 /* Set LED Mode in Asic Control */
Francois Romieu1202d6f2007-09-17 17:13:55 -0700433 ipg_set_led_mode(dev);
434
Pekka Enbergdea4a872007-11-30 09:54:51 +0200435 /* Set PHYSet Register Value */
Francois Romieu1202d6f2007-09-17 17:13:55 -0700436 ipg_set_phy_set(dev);
437 return 0;
438}
439
440/* Find the GMII PHY address. */
441static int ipg_find_phyaddr(struct net_device *dev)
442{
443 unsigned int phyaddr, i;
444
445 for (i = 0; i < 32; i++) {
446 u32 status;
447
448 /* Search for the correct PHY address among 32 possible. */
449 phyaddr = (IPG_NIC_PHY_ADDRESS + i) % 32;
450
451 /* 10/22/03 Grace change verify from GMII_PHY_STATUS to
452 GMII_PHY_ID1
453 */
454
455 status = mdio_read(dev, phyaddr, MII_BMSR);
456
457 if ((status != 0xFFFF) && (status != 0))
458 return phyaddr;
459 }
460
461 return 0x1f;
462}
463
464/*
465 * Configure IPG based on result of IEEE 802.3 PHY
466 * auto-negotiation.
467 */
468static int ipg_config_autoneg(struct net_device *dev)
469{
470 struct ipg_nic_private *sp = netdev_priv(dev);
471 void __iomem *ioaddr = sp->ioaddr;
472 unsigned int txflowcontrol;
473 unsigned int rxflowcontrol;
474 unsigned int fullduplex;
Francois Romieu1202d6f2007-09-17 17:13:55 -0700475 u32 mac_ctrl_val;
476 u32 asicctrl;
477 u8 phyctrl;
478
479 IPG_DEBUG_MSG("_config_autoneg\n");
480
481 asicctrl = ipg_r32(ASIC_CTRL);
482 phyctrl = ipg_r8(PHY_CTRL);
483 mac_ctrl_val = ipg_r32(MAC_CTRL);
484
485 /* Set flags for use in resolving auto-negotation, assuming
486 * non-1000Mbps, half duplex, no flow control.
487 */
488 fullduplex = 0;
489 txflowcontrol = 0;
490 rxflowcontrol = 0;
Francois Romieu1202d6f2007-09-17 17:13:55 -0700491
492 /* To accomodate a problem in 10Mbps operation,
493 * set a global flag if PHY running in 10Mbps mode.
494 */
495 sp->tenmbpsmode = 0;
496
497 printk(KERN_INFO "%s: Link speed = ", dev->name);
498
499 /* Determine actual speed of operation. */
500 switch (phyctrl & IPG_PC_LINK_SPEED) {
501 case IPG_PC_LINK_SPEED_10MBPS:
502 printk("10Mbps.\n");
503 printk(KERN_INFO "%s: 10Mbps operational mode enabled.\n",
504 dev->name);
505 sp->tenmbpsmode = 1;
506 break;
507 case IPG_PC_LINK_SPEED_100MBPS:
508 printk("100Mbps.\n");
509 break;
510 case IPG_PC_LINK_SPEED_1000MBPS:
511 printk("1000Mbps.\n");
Francois Romieu1202d6f2007-09-17 17:13:55 -0700512 break;
513 default:
514 printk("undefined!\n");
515 return 0;
516 }
517
518 if (phyctrl & IPG_PC_DUPLEX_STATUS) {
519 fullduplex = 1;
520 txflowcontrol = 1;
521 rxflowcontrol = 1;
522 }
523
524 /* Configure full duplex, and flow control. */
525 if (fullduplex == 1) {
526 /* Configure IPG for full duplex operation. */
527 printk(KERN_INFO "%s: setting full duplex, ", dev->name);
528
529 mac_ctrl_val |= IPG_MC_DUPLEX_SELECT_FD;
530
531 if (txflowcontrol == 1) {
532 printk("TX flow control");
533 mac_ctrl_val |= IPG_MC_TX_FLOW_CONTROL_ENABLE;
534 } else {
535 printk("no TX flow control");
536 mac_ctrl_val &= ~IPG_MC_TX_FLOW_CONTROL_ENABLE;
537 }
538
539 if (rxflowcontrol == 1) {
540 printk(", RX flow control.");
541 mac_ctrl_val |= IPG_MC_RX_FLOW_CONTROL_ENABLE;
542 } else {
543 printk(", no RX flow control.");
544 mac_ctrl_val &= ~IPG_MC_RX_FLOW_CONTROL_ENABLE;
545 }
546
547 printk("\n");
548 } else {
549 /* Configure IPG for half duplex operation. */
Pekka Enberg8da5bb72007-11-30 09:55:43 +0200550 printk(KERN_INFO "%s: setting half duplex, "
Francois Romieu1202d6f2007-09-17 17:13:55 -0700551 "no TX flow control, no RX flow control.\n", dev->name);
552
553 mac_ctrl_val &= ~IPG_MC_DUPLEX_SELECT_FD &
554 ~IPG_MC_TX_FLOW_CONTROL_ENABLE &
555 ~IPG_MC_RX_FLOW_CONTROL_ENABLE;
556 }
557 ipg_w32(mac_ctrl_val, MAC_CTRL);
558 return 0;
559}
560
561/* Determine and configure multicast operation and set
562 * receive mode for IPG.
563 */
564static void ipg_nic_set_multicast_list(struct net_device *dev)
565{
566 void __iomem *ioaddr = ipg_ioaddr(dev);
567 struct dev_mc_list *mc_list_ptr;
568 unsigned int hashindex;
569 u32 hashtable[2];
570 u8 receivemode;
571
572 IPG_DEBUG_MSG("_nic_set_multicast_list\n");
573
574 receivemode = IPG_RM_RECEIVEUNICAST | IPG_RM_RECEIVEBROADCAST;
575
576 if (dev->flags & IFF_PROMISC) {
577 /* NIC to be configured in promiscuous mode. */
578 receivemode = IPG_RM_RECEIVEALLFRAMES;
579 } else if ((dev->flags & IFF_ALLMULTI) ||
580 (dev->flags & IFF_MULTICAST &
581 (dev->mc_count > IPG_MULTICAST_HASHTABLE_SIZE))) {
582 /* NIC to be configured to receive all multicast
583 * frames. */
584 receivemode |= IPG_RM_RECEIVEMULTICAST;
585 } else if (dev->flags & IFF_MULTICAST & (dev->mc_count > 0)) {
586 /* NIC to be configured to receive selected
587 * multicast addresses. */
588 receivemode |= IPG_RM_RECEIVEMULTICASTHASH;
589 }
590
591 /* Calculate the bits to set for the 64 bit, IPG HASHTABLE.
592 * The IPG applies a cyclic-redundancy-check (the same CRC
593 * used to calculate the frame data FCS) to the destination
594 * address all incoming multicast frames whose destination
595 * address has the multicast bit set. The least significant
596 * 6 bits of the CRC result are used as an addressing index
597 * into the hash table. If the value of the bit addressed by
598 * this index is a 1, the frame is passed to the host system.
599 */
600
601 /* Clear hashtable. */
602 hashtable[0] = 0x00000000;
603 hashtable[1] = 0x00000000;
604
605 /* Cycle through all multicast addresses to filter. */
606 for (mc_list_ptr = dev->mc_list;
607 mc_list_ptr != NULL; mc_list_ptr = mc_list_ptr->next) {
608 /* Calculate CRC result for each multicast address. */
609 hashindex = crc32_le(0xffffffff, mc_list_ptr->dmi_addr,
610 ETH_ALEN);
611
612 /* Use only the least significant 6 bits. */
613 hashindex = hashindex & 0x3F;
614
615 /* Within "hashtable", set bit number "hashindex"
616 * to a logic 1.
617 */
618 set_bit(hashindex, (void *)hashtable);
619 }
620
621 /* Write the value of the hashtable, to the 4, 16 bit
622 * HASHTABLE IPG registers.
623 */
624 ipg_w32(hashtable[0], HASHTABLE_0);
625 ipg_w32(hashtable[1], HASHTABLE_1);
626
627 ipg_w8(IPG_RM_RSVD_MASK & receivemode, RECEIVE_MODE);
628
629 IPG_DEBUG_MSG("ReceiveMode = %x\n", ipg_r8(RECEIVE_MODE));
630}
631
632static int ipg_io_config(struct net_device *dev)
633{
634 void __iomem *ioaddr = ipg_ioaddr(dev);
635 u32 origmacctrl;
636 u32 restoremacctrl;
637
638 IPG_DEBUG_MSG("_io_config\n");
639
640 origmacctrl = ipg_r32(MAC_CTRL);
641
642 restoremacctrl = origmacctrl | IPG_MC_STATISTICS_ENABLE;
643
644 /* Based on compilation option, determine if FCS is to be
645 * stripped on receive frames by IPG.
646 */
647 if (!IPG_STRIP_FCS_ON_RX)
648 restoremacctrl |= IPG_MC_RCV_FCS;
649
650 /* Determine if transmitter and/or receiver are
651 * enabled so we may restore MACCTRL correctly.
652 */
653 if (origmacctrl & IPG_MC_TX_ENABLED)
654 restoremacctrl |= IPG_MC_TX_ENABLE;
655
656 if (origmacctrl & IPG_MC_RX_ENABLED)
657 restoremacctrl |= IPG_MC_RX_ENABLE;
658
659 /* Transmitter and receiver must be disabled before setting
660 * IFSSelect.
661 */
662 ipg_w32((origmacctrl & (IPG_MC_RX_DISABLE | IPG_MC_TX_DISABLE)) &
663 IPG_MC_RSVD_MASK, MAC_CTRL);
664
665 /* Now that transmitter and receiver are disabled, write
666 * to IFSSelect.
667 */
668 ipg_w32((origmacctrl & IPG_MC_IFS_96BIT) & IPG_MC_RSVD_MASK, MAC_CTRL);
669
670 /* Set RECEIVEMODE register. */
671 ipg_nic_set_multicast_list(dev);
672
673 ipg_w16(IPG_MAX_RXFRAME_SIZE, MAX_FRAME_SIZE);
674
675 ipg_w8(IPG_RXDMAPOLLPERIOD_VALUE, RX_DMA_POLL_PERIOD);
676 ipg_w8(IPG_RXDMAURGENTTHRESH_VALUE, RX_DMA_URGENT_THRESH);
677 ipg_w8(IPG_RXDMABURSTTHRESH_VALUE, RX_DMA_BURST_THRESH);
678 ipg_w8(IPG_TXDMAPOLLPERIOD_VALUE, TX_DMA_POLL_PERIOD);
679 ipg_w8(IPG_TXDMAURGENTTHRESH_VALUE, TX_DMA_URGENT_THRESH);
680 ipg_w8(IPG_TXDMABURSTTHRESH_VALUE, TX_DMA_BURST_THRESH);
681 ipg_w16((IPG_IE_HOST_ERROR | IPG_IE_TX_DMA_COMPLETE |
682 IPG_IE_TX_COMPLETE | IPG_IE_INT_REQUESTED |
683 IPG_IE_UPDATE_STATS | IPG_IE_LINK_EVENT |
684 IPG_IE_RX_DMA_COMPLETE | IPG_IE_RX_DMA_PRIORITY), INT_ENABLE);
685 ipg_w16(IPG_FLOWONTHRESH_VALUE, FLOW_ON_THRESH);
686 ipg_w16(IPG_FLOWOFFTHRESH_VALUE, FLOW_OFF_THRESH);
687
688 /* IPG multi-frag frame bug workaround.
689 * Per silicon revision B3 eratta.
690 */
691 ipg_w16(ipg_r16(DEBUG_CTRL) | 0x0200, DEBUG_CTRL);
692
693 /* IPG TX poll now bug workaround.
694 * Per silicon revision B3 eratta.
695 */
696 ipg_w16(ipg_r16(DEBUG_CTRL) | 0x0010, DEBUG_CTRL);
697
698 /* IPG RX poll now bug workaround.
699 * Per silicon revision B3 eratta.
700 */
701 ipg_w16(ipg_r16(DEBUG_CTRL) | 0x0020, DEBUG_CTRL);
702
703 /* Now restore MACCTRL to original setting. */
704 ipg_w32(IPG_MC_RSVD_MASK & restoremacctrl, MAC_CTRL);
705
706 /* Disable unused RMON statistics. */
707 ipg_w32(IPG_RZ_ALL, RMON_STATISTICS_MASK);
708
709 /* Disable unused MIB statistics. */
710 ipg_w32(IPG_SM_MACCONTROLFRAMESXMTD | IPG_SM_MACCONTROLFRAMESRCVD |
711 IPG_SM_BCSTOCTETXMTOK_BCSTFRAMESXMTDOK | IPG_SM_TXJUMBOFRAMES |
712 IPG_SM_MCSTOCTETXMTOK_MCSTFRAMESXMTDOK | IPG_SM_RXJUMBOFRAMES |
713 IPG_SM_BCSTOCTETRCVDOK_BCSTFRAMESRCVDOK |
714 IPG_SM_UDPCHECKSUMERRORS | IPG_SM_TCPCHECKSUMERRORS |
715 IPG_SM_IPCHECKSUMERRORS, STATISTICS_MASK);
716
717 return 0;
718}
719
720/*
721 * Create a receive buffer within system memory and update
722 * NIC private structure appropriately.
723 */
724static int ipg_get_rxbuff(struct net_device *dev, int entry)
725{
726 struct ipg_nic_private *sp = netdev_priv(dev);
727 struct ipg_rx *rxfd = sp->rxd + entry;
728 struct sk_buff *skb;
729 u64 rxfragsize;
730
731 IPG_DEBUG_MSG("_get_rxbuff\n");
732
733 skb = netdev_alloc_skb(dev, IPG_RXSUPPORT_SIZE + NET_IP_ALIGN);
734 if (!skb) {
Pekka Enberg9893ba12008-01-24 02:01:17 -0800735 sp->rx_buff[entry] = NULL;
Francois Romieu1202d6f2007-09-17 17:13:55 -0700736 return -ENOMEM;
737 }
738
739 /* Adjust the data start location within the buffer to
740 * align IP address field to a 16 byte boundary.
741 */
742 skb_reserve(skb, NET_IP_ALIGN);
743
744 /* Associate the receive buffer with the IPG NIC. */
745 skb->dev = dev;
746
747 /* Save the address of the sk_buff structure. */
Pekka Enberg9893ba12008-01-24 02:01:17 -0800748 sp->rx_buff[entry] = skb;
Francois Romieu1202d6f2007-09-17 17:13:55 -0700749
750 rxfd->frag_info = cpu_to_le64(pci_map_single(sp->pdev, skb->data,
751 sp->rx_buf_sz, PCI_DMA_FROMDEVICE));
752
753 /* Set the RFD fragment length. */
754 rxfragsize = IPG_RXFRAG_SIZE;
755 rxfd->frag_info |= cpu_to_le64((rxfragsize << 48) & IPG_RFI_FRAGLEN);
756
757 return 0;
758}
759
760static int init_rfdlist(struct net_device *dev)
761{
762 struct ipg_nic_private *sp = netdev_priv(dev);
763 void __iomem *ioaddr = sp->ioaddr;
764 unsigned int i;
765
766 IPG_DEBUG_MSG("_init_rfdlist\n");
767
768 for (i = 0; i < IPG_RFDLIST_LENGTH; i++) {
769 struct ipg_rx *rxfd = sp->rxd + i;
770
Pekka Enberg9893ba12008-01-24 02:01:17 -0800771 if (sp->rx_buff[i]) {
Francois Romieu1202d6f2007-09-17 17:13:55 -0700772 pci_unmap_single(sp->pdev,
Al Viro325a8072007-10-14 19:41:29 +0100773 le64_to_cpu(rxfd->frag_info) & ~IPG_RFI_FRAGLEN,
Francois Romieu1202d6f2007-09-17 17:13:55 -0700774 sp->rx_buf_sz, PCI_DMA_FROMDEVICE);
Pekka Enberg9893ba12008-01-24 02:01:17 -0800775 dev_kfree_skb_irq(sp->rx_buff[i]);
776 sp->rx_buff[i] = NULL;
Francois Romieu1202d6f2007-09-17 17:13:55 -0700777 }
778
779 /* Clear out the RFS field. */
780 rxfd->rfs = 0x0000000000000000;
781
782 if (ipg_get_rxbuff(dev, i) < 0) {
783 /*
784 * A receive buffer was not ready, break the
785 * RFD list here.
786 */
787 IPG_DEBUG_MSG("Cannot allocate Rx buffer.\n");
788
789 /* Just in case we cannot allocate a single RFD.
790 * Should not occur.
791 */
792 if (i == 0) {
793 printk(KERN_ERR "%s: No memory available"
794 " for RFD list.\n", dev->name);
795 return -ENOMEM;
796 }
797 }
798
799 rxfd->next_desc = cpu_to_le64(sp->rxd_map +
800 sizeof(struct ipg_rx)*(i + 1));
801 }
802 sp->rxd[i - 1].next_desc = cpu_to_le64(sp->rxd_map);
803
804 sp->rx_current = 0;
805 sp->rx_dirty = 0;
806
807 /* Write the location of the RFDList to the IPG. */
808 ipg_w32((u32) sp->rxd_map, RFD_LIST_PTR_0);
809 ipg_w32(0x00000000, RFD_LIST_PTR_1);
810
811 return 0;
812}
813
814static void init_tfdlist(struct net_device *dev)
815{
816 struct ipg_nic_private *sp = netdev_priv(dev);
817 void __iomem *ioaddr = sp->ioaddr;
818 unsigned int i;
819
820 IPG_DEBUG_MSG("_init_tfdlist\n");
821
822 for (i = 0; i < IPG_TFDLIST_LENGTH; i++) {
823 struct ipg_tx *txfd = sp->txd + i;
824
825 txfd->tfc = cpu_to_le64(IPG_TFC_TFDDONE);
826
Pekka Enberg9893ba12008-01-24 02:01:17 -0800827 if (sp->tx_buff[i]) {
828 dev_kfree_skb_irq(sp->tx_buff[i]);
829 sp->tx_buff[i] = NULL;
Francois Romieu1202d6f2007-09-17 17:13:55 -0700830 }
831
832 txfd->next_desc = cpu_to_le64(sp->txd_map +
833 sizeof(struct ipg_tx)*(i + 1));
834 }
835 sp->txd[i - 1].next_desc = cpu_to_le64(sp->txd_map);
836
837 sp->tx_current = 0;
838 sp->tx_dirty = 0;
839
840 /* Write the location of the TFDList to the IPG. */
841 IPG_DDEBUG_MSG("Starting TFDListPtr = %8.8x\n",
842 (u32) sp->txd_map);
843 ipg_w32((u32) sp->txd_map, TFD_LIST_PTR_0);
844 ipg_w32(0x00000000, TFD_LIST_PTR_1);
845
Pekka Enberg9893ba12008-01-24 02:01:17 -0800846 sp->reset_current_tfd = 1;
Francois Romieu1202d6f2007-09-17 17:13:55 -0700847}
848
849/*
850 * Free all transmit buffers which have already been transfered
851 * via DMA to the IPG.
852 */
853static void ipg_nic_txfree(struct net_device *dev)
854{
855 struct ipg_nic_private *sp = netdev_priv(dev);
Francois Romieu0da1b992008-01-10 23:40:59 +0100856 unsigned int released, pending, dirty;
trem1dad9392007-10-02 14:04:38 -0700857
Francois Romieu1202d6f2007-09-17 17:13:55 -0700858 IPG_DEBUG_MSG("_nic_txfree\n");
859
860 pending = sp->tx_current - sp->tx_dirty;
Francois Romieu0da1b992008-01-10 23:40:59 +0100861 dirty = sp->tx_dirty % IPG_TFDLIST_LENGTH;
Francois Romieu1202d6f2007-09-17 17:13:55 -0700862
863 for (released = 0; released < pending; released++) {
Pekka Enberg9893ba12008-01-24 02:01:17 -0800864 struct sk_buff *skb = sp->tx_buff[dirty];
Francois Romieu1202d6f2007-09-17 17:13:55 -0700865 struct ipg_tx *txfd = sp->txd + dirty;
866
867 IPG_DEBUG_MSG("TFC = %16.16lx\n", (unsigned long) txfd->tfc);
868
869 /* Look at each TFD's TFC field beginning
870 * at the last freed TFD up to the current TFD.
871 * If the TFDDone bit is set, free the associated
872 * buffer.
873 */
Francois Romieu0da1b992008-01-10 23:40:59 +0100874 if (!(txfd->tfc & cpu_to_le64(IPG_TFC_TFDDONE)))
875 break;
Francois Romieu1202d6f2007-09-17 17:13:55 -0700876
877 /* Free the transmit buffer. */
878 if (skb) {
879 pci_unmap_single(sp->pdev,
Al Viro325a8072007-10-14 19:41:29 +0100880 le64_to_cpu(txfd->frag_info) & ~IPG_TFI_FRAGLEN,
Francois Romieu1202d6f2007-09-17 17:13:55 -0700881 skb->len, PCI_DMA_TODEVICE);
882
Pekka Enberg85d68a52007-11-30 09:53:51 +0200883 dev_kfree_skb_irq(skb);
Francois Romieu1202d6f2007-09-17 17:13:55 -0700884
Pekka Enberg9893ba12008-01-24 02:01:17 -0800885 sp->tx_buff[dirty] = NULL;
Francois Romieu1202d6f2007-09-17 17:13:55 -0700886 }
Francois Romieu0da1b992008-01-10 23:40:59 +0100887 dirty = (dirty + 1) % IPG_TFDLIST_LENGTH;
Francois Romieu1202d6f2007-09-17 17:13:55 -0700888 }
889
890 sp->tx_dirty += released;
891
892 if (netif_queue_stopped(dev) &&
893 (sp->tx_current != (sp->tx_dirty + IPG_TFDLIST_LENGTH))) {
894 netif_wake_queue(dev);
895 }
896}
897
898static void ipg_tx_timeout(struct net_device *dev)
899{
900 struct ipg_nic_private *sp = netdev_priv(dev);
901 void __iomem *ioaddr = sp->ioaddr;
902
903 ipg_reset(dev, IPG_AC_TX_RESET | IPG_AC_DMA | IPG_AC_NETWORK |
904 IPG_AC_FIFO);
905
906 spin_lock_irq(&sp->lock);
907
908 /* Re-configure after DMA reset. */
909 if (ipg_io_config(dev) < 0) {
910 printk(KERN_INFO "%s: Error during re-configuration.\n",
911 dev->name);
912 }
913
914 init_tfdlist(dev);
915
916 spin_unlock_irq(&sp->lock);
917
918 ipg_w32((ipg_r32(MAC_CTRL) | IPG_MC_TX_ENABLE) & IPG_MC_RSVD_MASK,
919 MAC_CTRL);
920}
921
922/*
923 * For TxComplete interrupts, free all transmit
924 * buffers which have already been transfered via DMA
925 * to the IPG.
926 */
927static void ipg_nic_txcleanup(struct net_device *dev)
928{
929 struct ipg_nic_private *sp = netdev_priv(dev);
930 void __iomem *ioaddr = sp->ioaddr;
931 unsigned int i;
932
933 IPG_DEBUG_MSG("_nic_txcleanup\n");
934
935 for (i = 0; i < IPG_TFDLIST_LENGTH; i++) {
936 /* Reading the TXSTATUS register clears the
937 * TX_COMPLETE interrupt.
938 */
939 u32 txstatusdword = ipg_r32(TX_STATUS);
940
941 IPG_DEBUG_MSG("TxStatus = %8.8x\n", txstatusdword);
942
943 /* Check for Transmit errors. Error bits only valid if
944 * TX_COMPLETE bit in the TXSTATUS register is a 1.
945 */
946 if (!(txstatusdword & IPG_TS_TX_COMPLETE))
947 break;
948
949 /* If in 10Mbps mode, indicate transmit is ready. */
950 if (sp->tenmbpsmode) {
951 netif_wake_queue(dev);
952 }
953
954 /* Transmit error, increment stat counters. */
955 if (txstatusdword & IPG_TS_TX_ERROR) {
956 IPG_DEBUG_MSG("Transmit error.\n");
957 sp->stats.tx_errors++;
958 }
959
960 /* Late collision, re-enable transmitter. */
961 if (txstatusdword & IPG_TS_LATE_COLLISION) {
962 IPG_DEBUG_MSG("Late collision on transmit.\n");
963 ipg_w32((ipg_r32(MAC_CTRL) | IPG_MC_TX_ENABLE) &
964 IPG_MC_RSVD_MASK, MAC_CTRL);
965 }
966
967 /* Maximum collisions, re-enable transmitter. */
968 if (txstatusdword & IPG_TS_TX_MAX_COLL) {
969 IPG_DEBUG_MSG("Maximum collisions on transmit.\n");
970 ipg_w32((ipg_r32(MAC_CTRL) | IPG_MC_TX_ENABLE) &
971 IPG_MC_RSVD_MASK, MAC_CTRL);
972 }
973
974 /* Transmit underrun, reset and re-enable
975 * transmitter.
976 */
977 if (txstatusdword & IPG_TS_TX_UNDERRUN) {
978 IPG_DEBUG_MSG("Transmitter underrun.\n");
979 sp->stats.tx_fifo_errors++;
980 ipg_reset(dev, IPG_AC_TX_RESET | IPG_AC_DMA |
981 IPG_AC_NETWORK | IPG_AC_FIFO);
982
983 /* Re-configure after DMA reset. */
984 if (ipg_io_config(dev) < 0) {
985 printk(KERN_INFO
986 "%s: Error during re-configuration.\n",
987 dev->name);
988 }
989 init_tfdlist(dev);
990
991 ipg_w32((ipg_r32(MAC_CTRL) | IPG_MC_TX_ENABLE) &
992 IPG_MC_RSVD_MASK, MAC_CTRL);
993 }
994 }
995
996 ipg_nic_txfree(dev);
997}
998
999/* Provides statistical information about the IPG NIC. */
Adrian Bunk96fd74b2007-10-24 18:23:19 +02001000static struct net_device_stats *ipg_nic_get_stats(struct net_device *dev)
Francois Romieu1202d6f2007-09-17 17:13:55 -07001001{
1002 struct ipg_nic_private *sp = netdev_priv(dev);
1003 void __iomem *ioaddr = sp->ioaddr;
1004 u16 temp1;
1005 u16 temp2;
1006
1007 IPG_DEBUG_MSG("_nic_get_stats\n");
1008
1009 /* Check to see if the NIC has been initialized via nic_open,
1010 * before trying to read statistic registers.
1011 */
1012 if (!test_bit(__LINK_STATE_START, &dev->state))
1013 return &sp->stats;
1014
1015 sp->stats.rx_packets += ipg_r32(IPG_FRAMESRCVDOK);
1016 sp->stats.tx_packets += ipg_r32(IPG_FRAMESXMTDOK);
1017 sp->stats.rx_bytes += ipg_r32(IPG_OCTETRCVOK);
1018 sp->stats.tx_bytes += ipg_r32(IPG_OCTETXMTOK);
1019 temp1 = ipg_r16(IPG_FRAMESLOSTRXERRORS);
1020 sp->stats.rx_errors += temp1;
1021 sp->stats.rx_missed_errors += temp1;
1022 temp1 = ipg_r32(IPG_SINGLECOLFRAMES) + ipg_r32(IPG_MULTICOLFRAMES) +
1023 ipg_r32(IPG_LATECOLLISIONS);
1024 temp2 = ipg_r16(IPG_CARRIERSENSEERRORS);
1025 sp->stats.collisions += temp1;
1026 sp->stats.tx_dropped += ipg_r16(IPG_FRAMESABORTXSCOLLS);
1027 sp->stats.tx_errors += ipg_r16(IPG_FRAMESWEXDEFERRAL) +
1028 ipg_r32(IPG_FRAMESWDEFERREDXMT) + temp1 + temp2;
1029 sp->stats.multicast += ipg_r32(IPG_MCSTOCTETRCVDOK);
1030
1031 /* detailed tx_errors */
1032 sp->stats.tx_carrier_errors += temp2;
1033
1034 /* detailed rx_errors */
1035 sp->stats.rx_length_errors += ipg_r16(IPG_INRANGELENGTHERRORS) +
1036 ipg_r16(IPG_FRAMETOOLONGERRRORS);
1037 sp->stats.rx_crc_errors += ipg_r16(IPG_FRAMECHECKSEQERRORS);
1038
1039 /* Unutilized IPG statistic registers. */
1040 ipg_r32(IPG_MCSTFRAMESRCVDOK);
1041
1042 return &sp->stats;
1043}
1044
1045/* Restore used receive buffers. */
1046static int ipg_nic_rxrestore(struct net_device *dev)
1047{
1048 struct ipg_nic_private *sp = netdev_priv(dev);
1049 const unsigned int curr = sp->rx_current;
1050 unsigned int dirty = sp->rx_dirty;
1051
1052 IPG_DEBUG_MSG("_nic_rxrestore\n");
1053
1054 for (dirty = sp->rx_dirty; curr - dirty > 0; dirty++) {
1055 unsigned int entry = dirty % IPG_RFDLIST_LENGTH;
1056
1057 /* rx_copybreak may poke hole here and there. */
Pekka Enberg9893ba12008-01-24 02:01:17 -08001058 if (sp->rx_buff[entry])
Francois Romieu1202d6f2007-09-17 17:13:55 -07001059 continue;
1060
1061 /* Generate a new receive buffer to replace the
1062 * current buffer (which will be released by the
1063 * Linux system).
1064 */
1065 if (ipg_get_rxbuff(dev, entry) < 0) {
1066 IPG_DEBUG_MSG("Cannot allocate new Rx buffer.\n");
1067
1068 break;
1069 }
1070
1071 /* Reset the RFS field. */
1072 sp->rxd[entry].rfs = 0x0000000000000000;
1073 }
1074 sp->rx_dirty = dirty;
1075
1076 return 0;
1077}
1078
1079#ifdef JUMBO_FRAME
1080
1081/* use jumboindex and jumbosize to control jumbo frame status
Pekka Enberg8da5bb72007-11-30 09:55:43 +02001082 * initial status is jumboindex=-1 and jumbosize=0
1083 * 1. jumboindex = -1 and jumbosize=0 : previous jumbo frame has been done.
1084 * 2. jumboindex != -1 and jumbosize != 0 : jumbo frame is not over size and receiving
1085 * 3. jumboindex = -1 and jumbosize != 0 : jumbo frame is over size, already dump
1086 * previous receiving and need to continue dumping the current one
1087 */
Francois Romieu1202d6f2007-09-17 17:13:55 -07001088enum {
Pekka Enberg9893ba12008-01-24 02:01:17 -08001089 NORMAL_PACKET,
1090 ERROR_PACKET
Francois Romieu1202d6f2007-09-17 17:13:55 -07001091};
1092
1093enum {
Pekka Enberg9893ba12008-01-24 02:01:17 -08001094 FRAME_NO_START_NO_END = 0,
1095 FRAME_WITH_START = 1,
1096 FRAME_WITH_END = 10,
1097 FRAME_WITH_START_WITH_END = 11
Francois Romieu1202d6f2007-09-17 17:13:55 -07001098};
1099
1100inline void ipg_nic_rx_free_skb(struct net_device *dev)
1101{
1102 struct ipg_nic_private *sp = netdev_priv(dev);
1103 unsigned int entry = sp->rx_current % IPG_RFDLIST_LENGTH;
1104
Pekka Enberg9893ba12008-01-24 02:01:17 -08001105 if (sp->rx_buff[entry]) {
Francois Romieu1202d6f2007-09-17 17:13:55 -07001106 struct ipg_rx *rxfd = sp->rxd + entry;
1107
1108 pci_unmap_single(sp->pdev,
1109 le64_to_cpu(rxfd->frag_info & ~IPG_RFI_FRAGLEN),
1110 sp->rx_buf_sz, PCI_DMA_FROMDEVICE);
Pekka Enberg9893ba12008-01-24 02:01:17 -08001111 dev_kfree_skb_irq(sp->rx_buff[entry]);
1112 sp->rx_buff[entry] = NULL;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001113 }
1114}
1115
1116inline int ipg_nic_rx_check_frame_type(struct net_device *dev)
1117{
1118 struct ipg_nic_private *sp = netdev_priv(dev);
1119 struct ipg_rx *rxfd = sp->rxd + (sp->rx_current % IPG_RFDLIST_LENGTH);
Pekka Enberg9893ba12008-01-24 02:01:17 -08001120 int type = FRAME_NO_START_NO_END;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001121
1122 if (le64_to_cpu(rxfd->rfs) & IPG_RFS_FRAMESTART)
Pekka Enberg9893ba12008-01-24 02:01:17 -08001123 type += FRAME_WITH_START;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001124 if (le64_to_cpu(rxfd->rfs) & IPG_RFS_FRAMEEND)
Pekka Enberg9893ba12008-01-24 02:01:17 -08001125 type += FRAME_WITH_END;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001126 return type;
1127}
1128
1129inline int ipg_nic_rx_check_error(struct net_device *dev)
1130{
1131 struct ipg_nic_private *sp = netdev_priv(dev);
1132 unsigned int entry = sp->rx_current % IPG_RFDLIST_LENGTH;
1133 struct ipg_rx *rxfd = sp->rxd + entry;
1134
1135 if (IPG_DROP_ON_RX_ETH_ERRORS && (le64_to_cpu(rxfd->rfs) &
1136 (IPG_RFS_RXFIFOOVERRUN | IPG_RFS_RXRUNTFRAME |
1137 IPG_RFS_RXALIGNMENTERROR | IPG_RFS_RXFCSERROR |
1138 IPG_RFS_RXOVERSIZEDFRAME | IPG_RFS_RXLENGTHERROR))) {
1139 IPG_DEBUG_MSG("Rx error, RFS = %16.16lx\n",
1140 (unsigned long) rxfd->rfs);
1141
1142 /* Increment general receive error statistic. */
1143 sp->stats.rx_errors++;
1144
1145 /* Increment detailed receive error statistics. */
1146 if (le64_to_cpu(rxfd->rfs) & IPG_RFS_RXFIFOOVERRUN) {
1147 IPG_DEBUG_MSG("RX FIFO overrun occured.\n");
1148
1149 sp->stats.rx_fifo_errors++;
1150 }
1151
1152 if (le64_to_cpu(rxfd->rfs) & IPG_RFS_RXRUNTFRAME) {
1153 IPG_DEBUG_MSG("RX runt occured.\n");
1154 sp->stats.rx_length_errors++;
1155 }
1156
1157 /* Do nothing for IPG_RFS_RXOVERSIZEDFRAME,
1158 * error count handled by a IPG statistic register.
1159 */
1160
1161 if (le64_to_cpu(rxfd->rfs) & IPG_RFS_RXALIGNMENTERROR) {
1162 IPG_DEBUG_MSG("RX alignment error occured.\n");
1163 sp->stats.rx_frame_errors++;
1164 }
1165
1166 /* Do nothing for IPG_RFS_RXFCSERROR, error count
1167 * handled by a IPG statistic register.
1168 */
1169
1170 /* Free the memory associated with the RX
1171 * buffer since it is erroneous and we will
1172 * not pass it to higher layer processes.
1173 */
Pekka Enberg9893ba12008-01-24 02:01:17 -08001174 if (sp->rx_buff[entry]) {
Francois Romieu1202d6f2007-09-17 17:13:55 -07001175 pci_unmap_single(sp->pdev,
1176 le64_to_cpu(rxfd->frag_info & ~IPG_RFI_FRAGLEN),
1177 sp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1178
Pekka Enberg9893ba12008-01-24 02:01:17 -08001179 dev_kfree_skb_irq(sp->rx_buff[entry]);
1180 sp->rx_buff[entry] = NULL;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001181 }
Pekka Enberg9893ba12008-01-24 02:01:17 -08001182 return ERROR_PACKET;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001183 }
Pekka Enberg9893ba12008-01-24 02:01:17 -08001184 return NORMAL_PACKET;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001185}
1186
1187static void ipg_nic_rx_with_start_and_end(struct net_device *dev,
1188 struct ipg_nic_private *sp,
1189 struct ipg_rx *rxfd, unsigned entry)
1190{
Pekka Enberg9893ba12008-01-24 02:01:17 -08001191 struct ipg_jumbo *jumbo = &sp->jumbo;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001192 struct sk_buff *skb;
1193 int framelen;
1194
Pekka Enberg9893ba12008-01-24 02:01:17 -08001195 if (jumbo->found_start) {
Pekka Enberg85d68a52007-11-30 09:53:51 +02001196 dev_kfree_skb_irq(jumbo->skb);
Pekka Enberg9893ba12008-01-24 02:01:17 -08001197 jumbo->found_start = 0;
1198 jumbo->current_size = 0;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001199 jumbo->skb = NULL;
1200 }
1201
Pekka Enberg8da5bb72007-11-30 09:55:43 +02001202 /* 1: found error, 0 no error */
Pekka Enberg9893ba12008-01-24 02:01:17 -08001203 if (ipg_nic_rx_check_error(dev) != NORMAL_PACKET)
Francois Romieu1202d6f2007-09-17 17:13:55 -07001204 return;
1205
Pekka Enberg9893ba12008-01-24 02:01:17 -08001206 skb = sp->rx_buff[entry];
Francois Romieu1202d6f2007-09-17 17:13:55 -07001207 if (!skb)
1208 return;
1209
Pekka Enberg8da5bb72007-11-30 09:55:43 +02001210 /* accept this frame and send to upper layer */
Francois Romieu1202d6f2007-09-17 17:13:55 -07001211 framelen = le64_to_cpu(rxfd->rfs) & IPG_RFS_RXFRAMELEN;
1212 if (framelen > IPG_RXFRAG_SIZE)
1213 framelen = IPG_RXFRAG_SIZE;
1214
1215 skb_put(skb, framelen);
1216 skb->protocol = eth_type_trans(skb, dev);
1217 skb->ip_summed = CHECKSUM_NONE;
1218 netif_rx(skb);
1219 dev->last_rx = jiffies;
Pekka Enberg9893ba12008-01-24 02:01:17 -08001220 sp->rx_buff[entry] = NULL;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001221}
1222
1223static void ipg_nic_rx_with_start(struct net_device *dev,
1224 struct ipg_nic_private *sp,
1225 struct ipg_rx *rxfd, unsigned entry)
1226{
Pekka Enberg9893ba12008-01-24 02:01:17 -08001227 struct ipg_jumbo *jumbo = &sp->jumbo;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001228 struct pci_dev *pdev = sp->pdev;
1229 struct sk_buff *skb;
1230
Pekka Enberg8da5bb72007-11-30 09:55:43 +02001231 /* 1: found error, 0 no error */
Pekka Enberg9893ba12008-01-24 02:01:17 -08001232 if (ipg_nic_rx_check_error(dev) != NORMAL_PACKET)
Francois Romieu1202d6f2007-09-17 17:13:55 -07001233 return;
1234
Pekka Enberg8da5bb72007-11-30 09:55:43 +02001235 /* accept this frame and send to upper layer */
Pekka Enberg9893ba12008-01-24 02:01:17 -08001236 skb = sp->rx_buff[entry];
Francois Romieu1202d6f2007-09-17 17:13:55 -07001237 if (!skb)
1238 return;
1239
Pekka Enberg9893ba12008-01-24 02:01:17 -08001240 if (jumbo->found_start)
Pekka Enberg85d68a52007-11-30 09:53:51 +02001241 dev_kfree_skb_irq(jumbo->skb);
Francois Romieu1202d6f2007-09-17 17:13:55 -07001242
1243 pci_unmap_single(pdev, le64_to_cpu(rxfd->frag_info & ~IPG_RFI_FRAGLEN),
1244 sp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1245
1246 skb_put(skb, IPG_RXFRAG_SIZE);
1247
Pekka Enberg9893ba12008-01-24 02:01:17 -08001248 jumbo->found_start = 1;
1249 jumbo->current_size = IPG_RXFRAG_SIZE;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001250 jumbo->skb = skb;
1251
Pekka Enberg9893ba12008-01-24 02:01:17 -08001252 sp->rx_buff[entry] = NULL;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001253 dev->last_rx = jiffies;
1254}
1255
1256static void ipg_nic_rx_with_end(struct net_device *dev,
1257 struct ipg_nic_private *sp,
1258 struct ipg_rx *rxfd, unsigned entry)
1259{
Pekka Enberg9893ba12008-01-24 02:01:17 -08001260 struct ipg_jumbo *jumbo = &sp->jumbo;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001261
Pekka Enberg8da5bb72007-11-30 09:55:43 +02001262 /* 1: found error, 0 no error */
Pekka Enberg9893ba12008-01-24 02:01:17 -08001263 if (ipg_nic_rx_check_error(dev) == NORMAL_PACKET) {
1264 struct sk_buff *skb = sp->rx_buff[entry];
Francois Romieu1202d6f2007-09-17 17:13:55 -07001265
1266 if (!skb)
1267 return;
1268
Pekka Enberg9893ba12008-01-24 02:01:17 -08001269 if (jumbo->found_start) {
Francois Romieu1202d6f2007-09-17 17:13:55 -07001270 int framelen, endframelen;
1271
1272 framelen = le64_to_cpu(rxfd->rfs) & IPG_RFS_RXFRAMELEN;
1273
Pekka Enberg9893ba12008-01-24 02:01:17 -08001274 endframeLen = framelen - jumbo->current_size;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001275 /*
1276 if (framelen > IPG_RXFRAG_SIZE)
1277 framelen=IPG_RXFRAG_SIZE;
1278 */
1279 if (framelen > IPG_RXSUPPORT_SIZE)
Pekka Enberg85d68a52007-11-30 09:53:51 +02001280 dev_kfree_skb_irq(jumbo->skb);
Francois Romieu1202d6f2007-09-17 17:13:55 -07001281 else {
1282 memcpy(skb_put(jumbo->skb, endframeLen),
1283 skb->data, endframeLen);
1284
1285 jumbo->skb->protocol =
1286 eth_type_trans(jumbo->skb, dev);
1287
1288 jumbo->skb->ip_summed = CHECKSUM_NONE;
1289 netif_rx(jumbo->skb);
1290 }
1291 }
1292
1293 dev->last_rx = jiffies;
Pekka Enberg9893ba12008-01-24 02:01:17 -08001294 jumbo->found_start = 0;
1295 jumbo->current_size = 0;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001296 jumbo->skb = NULL;
1297
1298 ipg_nic_rx_free_skb(dev);
1299 } else {
Pekka Enberg85d68a52007-11-30 09:53:51 +02001300 dev_kfree_skb_irq(jumbo->skb);
Pekka Enberg9893ba12008-01-24 02:01:17 -08001301 jumbo->found_start = 0;
1302 jumbo->current_size = 0;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001303 jumbo->skb = NULL;
1304 }
1305}
1306
1307static void ipg_nic_rx_no_start_no_end(struct net_device *dev,
1308 struct ipg_nic_private *sp,
1309 struct ipg_rx *rxfd, unsigned entry)
1310{
Pekka Enberg9893ba12008-01-24 02:01:17 -08001311 struct ipg_jumbo *jumbo = &sp->jumbo;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001312
Pekka Enberg8da5bb72007-11-30 09:55:43 +02001313 /* 1: found error, 0 no error */
Pekka Enberg9893ba12008-01-24 02:01:17 -08001314 if (ipg_nic_rx_check_error(dev) == NORMAL_PACKET) {
1315 struct sk_buff *skb = sp->rx_buff[entry];
Francois Romieu1202d6f2007-09-17 17:13:55 -07001316
1317 if (skb) {
Pekka Enberg9893ba12008-01-24 02:01:17 -08001318 if (jumbo->found_start) {
1319 jumbo->current_size += IPG_RXFRAG_SIZE;
1320 if (jumbo->current_size <= IPG_RXSUPPORT_SIZE) {
Francois Romieu1202d6f2007-09-17 17:13:55 -07001321 memcpy(skb_put(jumbo->skb,
1322 IPG_RXFRAG_SIZE),
1323 skb->data, IPG_RXFRAG_SIZE);
1324 }
1325 }
1326 dev->last_rx = jiffies;
1327 ipg_nic_rx_free_skb(dev);
1328 }
1329 } else {
Pekka Enberg85d68a52007-11-30 09:53:51 +02001330 dev_kfree_skb_irq(jumbo->skb);
Pekka Enberg9893ba12008-01-24 02:01:17 -08001331 jumbo->found_start = 0;
1332 jumbo->current_size = 0;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001333 jumbo->skb = NULL;
1334 }
1335}
1336
1337static int ipg_nic_rx(struct net_device *dev)
1338{
1339 struct ipg_nic_private *sp = netdev_priv(dev);
1340 unsigned int curr = sp->rx_current;
1341 void __iomem *ioaddr = sp->ioaddr;
1342 unsigned int i;
1343
1344 IPG_DEBUG_MSG("_nic_rx\n");
1345
1346 for (i = 0; i < IPG_MAXRFDPROCESS_COUNT; i++, curr++) {
1347 unsigned int entry = curr % IPG_RFDLIST_LENGTH;
1348 struct ipg_rx *rxfd = sp->rxd + entry;
1349
1350 if (!(rxfd->rfs & le64_to_cpu(IPG_RFS_RFDDONE)))
1351 break;
1352
1353 switch (ipg_nic_rx_check_frame_type(dev)) {
Pekka Enberg9893ba12008-01-24 02:01:17 -08001354 case FRAME_WITH_START_WITH_END:
Francois Romieu1202d6f2007-09-17 17:13:55 -07001355 ipg_nic_rx_with_start_and_end(dev, tp, rxfd, entry);
1356 break;
Pekka Enberg9893ba12008-01-24 02:01:17 -08001357 case FRAME_WITH_START:
Francois Romieu1202d6f2007-09-17 17:13:55 -07001358 ipg_nic_rx_with_start(dev, tp, rxfd, entry);
1359 break;
Pekka Enberg9893ba12008-01-24 02:01:17 -08001360 case FRAME_WITH_END:
Francois Romieu1202d6f2007-09-17 17:13:55 -07001361 ipg_nic_rx_with_end(dev, tp, rxfd, entry);
1362 break;
Pekka Enberg9893ba12008-01-24 02:01:17 -08001363 case FRAME_NO_START_NO_END:
Francois Romieu1202d6f2007-09-17 17:13:55 -07001364 ipg_nic_rx_no_start_no_end(dev, tp, rxfd, entry);
1365 break;
1366 }
1367 }
1368
1369 sp->rx_current = curr;
1370
1371 if (i == IPG_MAXRFDPROCESS_COUNT) {
1372 /* There are more RFDs to process, however the
1373 * allocated amount of RFD processing time has
1374 * expired. Assert Interrupt Requested to make
1375 * sure we come back to process the remaining RFDs.
1376 */
1377 ipg_w32(ipg_r32(ASIC_CTRL) | IPG_AC_INT_REQUEST, ASIC_CTRL);
1378 }
1379
1380 ipg_nic_rxrestore(dev);
1381
1382 return 0;
1383}
1384
1385#else
1386static int ipg_nic_rx(struct net_device *dev)
1387{
1388 /* Transfer received Ethernet frames to higher network layers. */
1389 struct ipg_nic_private *sp = netdev_priv(dev);
1390 unsigned int curr = sp->rx_current;
1391 void __iomem *ioaddr = sp->ioaddr;
1392 struct ipg_rx *rxfd;
1393 unsigned int i;
1394
1395 IPG_DEBUG_MSG("_nic_rx\n");
1396
1397#define __RFS_MASK \
1398 cpu_to_le64(IPG_RFS_RFDDONE | IPG_RFS_FRAMESTART | IPG_RFS_FRAMEEND)
1399
1400 for (i = 0; i < IPG_MAXRFDPROCESS_COUNT; i++, curr++) {
1401 unsigned int entry = curr % IPG_RFDLIST_LENGTH;
Pekka Enberg9893ba12008-01-24 02:01:17 -08001402 struct sk_buff *skb = sp->rx_buff[entry];
Francois Romieu1202d6f2007-09-17 17:13:55 -07001403 unsigned int framelen;
1404
1405 rxfd = sp->rxd + entry;
1406
1407 if (((rxfd->rfs & __RFS_MASK) != __RFS_MASK) || !skb)
1408 break;
1409
1410 /* Get received frame length. */
1411 framelen = le64_to_cpu(rxfd->rfs) & IPG_RFS_RXFRAMELEN;
1412
1413 /* Check for jumbo frame arrival with too small
1414 * RXFRAG_SIZE.
1415 */
1416 if (framelen > IPG_RXFRAG_SIZE) {
1417 IPG_DEBUG_MSG
1418 ("RFS FrameLen > allocated fragment size.\n");
1419
1420 framelen = IPG_RXFRAG_SIZE;
1421 }
1422
Al Viro325a8072007-10-14 19:41:29 +01001423 if ((IPG_DROP_ON_RX_ETH_ERRORS && (le64_to_cpu(rxfd->rfs) &
Francois Romieu1202d6f2007-09-17 17:13:55 -07001424 (IPG_RFS_RXFIFOOVERRUN | IPG_RFS_RXRUNTFRAME |
1425 IPG_RFS_RXALIGNMENTERROR | IPG_RFS_RXFCSERROR |
Al Viro325a8072007-10-14 19:41:29 +01001426 IPG_RFS_RXOVERSIZEDFRAME | IPG_RFS_RXLENGTHERROR)))) {
Francois Romieu1202d6f2007-09-17 17:13:55 -07001427
1428 IPG_DEBUG_MSG("Rx error, RFS = %16.16lx\n",
1429 (unsigned long int) rxfd->rfs);
1430
1431 /* Increment general receive error statistic. */
1432 sp->stats.rx_errors++;
1433
1434 /* Increment detailed receive error statistics. */
Al Viro325a8072007-10-14 19:41:29 +01001435 if (le64_to_cpu(rxfd->rfs) & IPG_RFS_RXFIFOOVERRUN) {
Francois Romieu1202d6f2007-09-17 17:13:55 -07001436 IPG_DEBUG_MSG("RX FIFO overrun occured.\n");
1437 sp->stats.rx_fifo_errors++;
1438 }
1439
Al Viro325a8072007-10-14 19:41:29 +01001440 if (le64_to_cpu(rxfd->rfs) & IPG_RFS_RXRUNTFRAME) {
Francois Romieu1202d6f2007-09-17 17:13:55 -07001441 IPG_DEBUG_MSG("RX runt occured.\n");
1442 sp->stats.rx_length_errors++;
1443 }
1444
Al Viro325a8072007-10-14 19:41:29 +01001445 if (le64_to_cpu(rxfd->rfs) & IPG_RFS_RXOVERSIZEDFRAME) ;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001446 /* Do nothing, error count handled by a IPG
1447 * statistic register.
1448 */
1449
Al Viro325a8072007-10-14 19:41:29 +01001450 if (le64_to_cpu(rxfd->rfs) & IPG_RFS_RXALIGNMENTERROR) {
Francois Romieu1202d6f2007-09-17 17:13:55 -07001451 IPG_DEBUG_MSG("RX alignment error occured.\n");
1452 sp->stats.rx_frame_errors++;
1453 }
1454
Al Viro325a8072007-10-14 19:41:29 +01001455 if (le64_to_cpu(rxfd->rfs) & IPG_RFS_RXFCSERROR) ;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001456 /* Do nothing, error count handled by a IPG
1457 * statistic register.
1458 */
1459
1460 /* Free the memory associated with the RX
1461 * buffer since it is erroneous and we will
1462 * not pass it to higher layer processes.
1463 */
1464 if (skb) {
Al Viro325a8072007-10-14 19:41:29 +01001465 __le64 info = rxfd->frag_info;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001466
1467 pci_unmap_single(sp->pdev,
Al Viro325a8072007-10-14 19:41:29 +01001468 le64_to_cpu(info) & ~IPG_RFI_FRAGLEN,
Francois Romieu1202d6f2007-09-17 17:13:55 -07001469 sp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1470
Pekka Enberg85d68a52007-11-30 09:53:51 +02001471 dev_kfree_skb_irq(skb);
Francois Romieu1202d6f2007-09-17 17:13:55 -07001472 }
1473 } else {
1474
1475 /* Adjust the new buffer length to accomodate the size
1476 * of the received frame.
1477 */
1478 skb_put(skb, framelen);
1479
1480 /* Set the buffer's protocol field to Ethernet. */
1481 skb->protocol = eth_type_trans(skb, dev);
1482
Pekka Enberg6d3b2cb2007-11-30 09:54:33 +02001483 /* The IPG encountered an error with (or
1484 * there were no) IP/TCP/UDP checksums.
1485 * This may or may not indicate an invalid
1486 * IP/TCP/UDP frame was received. Let the
1487 * upper layer decide.
Francois Romieu1202d6f2007-09-17 17:13:55 -07001488 */
Pekka Enberg6d3b2cb2007-11-30 09:54:33 +02001489 skb->ip_summed = CHECKSUM_NONE;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001490
1491 /* Hand off frame for higher layer processing.
1492 * The function netif_rx() releases the sk_buff
1493 * when processing completes.
1494 */
1495 netif_rx(skb);
1496
1497 /* Record frame receive time (jiffies = Linux
1498 * kernel current time stamp).
1499 */
1500 dev->last_rx = jiffies;
1501 }
1502
1503 /* Assure RX buffer is not reused by IPG. */
Pekka Enberg9893ba12008-01-24 02:01:17 -08001504 sp->rx_buff[entry] = NULL;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001505 }
1506
1507 /*
1508 * If there are more RFDs to proces and the allocated amount of RFD
1509 * processing time has expired, assert Interrupt Requested to make
1510 * sure we come back to process the remaining RFDs.
1511 */
1512 if (i == IPG_MAXRFDPROCESS_COUNT)
1513 ipg_w32(ipg_r32(ASIC_CTRL) | IPG_AC_INT_REQUEST, ASIC_CTRL);
1514
1515#ifdef IPG_DEBUG
1516 /* Check if the RFD list contained no receive frame data. */
1517 if (!i)
1518 sp->EmptyRFDListCount++;
1519#endif
Al Viro325a8072007-10-14 19:41:29 +01001520 while ((le64_to_cpu(rxfd->rfs) & IPG_RFS_RFDDONE) &&
1521 !((le64_to_cpu(rxfd->rfs) & IPG_RFS_FRAMESTART) &&
1522 (le64_to_cpu(rxfd->rfs) & IPG_RFS_FRAMEEND))) {
Francois Romieu1202d6f2007-09-17 17:13:55 -07001523 unsigned int entry = curr++ % IPG_RFDLIST_LENGTH;
1524
1525 rxfd = sp->rxd + entry;
1526
1527 IPG_DEBUG_MSG("Frame requires multiple RFDs.\n");
1528
1529 /* An unexpected event, additional code needed to handle
1530 * properly. So for the time being, just disregard the
1531 * frame.
1532 */
1533
1534 /* Free the memory associated with the RX
1535 * buffer since it is erroneous and we will
1536 * not pass it to higher layer processes.
1537 */
Pekka Enberg9893ba12008-01-24 02:01:17 -08001538 if (sp->rx_buff[entry]) {
Francois Romieu1202d6f2007-09-17 17:13:55 -07001539 pci_unmap_single(sp->pdev,
Al Viro325a8072007-10-14 19:41:29 +01001540 le64_to_cpu(rxfd->frag_info) & ~IPG_RFI_FRAGLEN,
Francois Romieu1202d6f2007-09-17 17:13:55 -07001541 sp->rx_buf_sz, PCI_DMA_FROMDEVICE);
Pekka Enberg9893ba12008-01-24 02:01:17 -08001542 dev_kfree_skb_irq(sp->rx_buff[entry]);
Francois Romieu1202d6f2007-09-17 17:13:55 -07001543 }
1544
1545 /* Assure RX buffer is not reused by IPG. */
Pekka Enberg9893ba12008-01-24 02:01:17 -08001546 sp->rx_buff[entry] = NULL;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001547 }
1548
1549 sp->rx_current = curr;
1550
1551 /* Check to see if there are a minimum number of used
1552 * RFDs before restoring any (should improve performance.)
1553 */
1554 if ((curr - sp->rx_dirty) >= IPG_MINUSEDRFDSTOFREE)
1555 ipg_nic_rxrestore(dev);
1556
1557 return 0;
1558}
1559#endif
1560
1561static void ipg_reset_after_host_error(struct work_struct *work)
1562{
1563 struct ipg_nic_private *sp =
1564 container_of(work, struct ipg_nic_private, task.work);
1565 struct net_device *dev = sp->dev;
1566
1567 IPG_DDEBUG_MSG("DMACtrl = %8.8x\n", ioread32(sp->ioaddr + IPG_DMACTRL));
1568
1569 /*
1570 * Acknowledge HostError interrupt by resetting
1571 * IPG DMA and HOST.
1572 */
1573 ipg_reset(dev, IPG_AC_GLOBAL_RESET | IPG_AC_HOST | IPG_AC_DMA);
1574
1575 init_rfdlist(dev);
1576 init_tfdlist(dev);
1577
1578 if (ipg_io_config(dev) < 0) {
1579 printk(KERN_INFO "%s: Cannot recover from PCI error.\n",
1580 dev->name);
1581 schedule_delayed_work(&sp->task, HZ);
1582 }
1583}
1584
1585static irqreturn_t ipg_interrupt_handler(int irq, void *dev_inst)
1586{
1587 struct net_device *dev = dev_inst;
1588 struct ipg_nic_private *sp = netdev_priv(dev);
1589 void __iomem *ioaddr = sp->ioaddr;
1590 unsigned int handled = 0;
1591 u16 status;
1592
1593 IPG_DEBUG_MSG("_interrupt_handler\n");
1594
1595#ifdef JUMBO_FRAME
1596 ipg_nic_rxrestore(dev);
1597#endif
Francois Romieu227bc242008-01-10 23:25:30 +01001598 spin_lock(&sp->lock);
1599
Francois Romieu1202d6f2007-09-17 17:13:55 -07001600 /* Get interrupt source information, and acknowledge
1601 * some (i.e. TxDMAComplete, RxDMAComplete, RxEarly,
1602 * IntRequested, MacControlFrame, LinkEvent) interrupts
1603 * if issued. Also, all IPG interrupts are disabled by
1604 * reading IntStatusAck.
1605 */
1606 status = ipg_r16(INT_STATUS_ACK);
1607
1608 IPG_DEBUG_MSG("IntStatusAck = %4.4x\n", status);
1609
1610 /* Shared IRQ of remove event. */
1611 if (!(status & IPG_IS_RSVD_MASK))
1612 goto out_enable;
1613
1614 handled = 1;
1615
1616 if (unlikely(!netif_running(dev)))
Francois Romieu227bc242008-01-10 23:25:30 +01001617 goto out_unlock;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001618
1619 /* If RFDListEnd interrupt, restore all used RFDs. */
1620 if (status & IPG_IS_RFD_LIST_END) {
1621 IPG_DEBUG_MSG("RFDListEnd Interrupt.\n");
1622
1623 /* The RFD list end indicates an RFD was encountered
1624 * with a 0 NextPtr, or with an RFDDone bit set to 1
1625 * (indicating the RFD is not read for use by the
1626 * IPG.) Try to restore all RFDs.
1627 */
1628 ipg_nic_rxrestore(dev);
1629
1630#ifdef IPG_DEBUG
1631 /* Increment the RFDlistendCount counter. */
1632 sp->RFDlistendCount++;
1633#endif
1634 }
1635
1636 /* If RFDListEnd, RxDMAPriority, RxDMAComplete, or
1637 * IntRequested interrupt, process received frames. */
1638 if ((status & IPG_IS_RX_DMA_PRIORITY) ||
1639 (status & IPG_IS_RFD_LIST_END) ||
1640 (status & IPG_IS_RX_DMA_COMPLETE) ||
1641 (status & IPG_IS_INT_REQUESTED)) {
1642#ifdef IPG_DEBUG
1643 /* Increment the RFD list checked counter if interrupted
1644 * only to check the RFD list. */
1645 if (status & (~(IPG_IS_RX_DMA_PRIORITY | IPG_IS_RFD_LIST_END |
1646 IPG_IS_RX_DMA_COMPLETE | IPG_IS_INT_REQUESTED) &
1647 (IPG_IS_HOST_ERROR | IPG_IS_TX_DMA_COMPLETE |
1648 IPG_IS_LINK_EVENT | IPG_IS_TX_COMPLETE |
1649 IPG_IS_UPDATE_STATS)))
1650 sp->RFDListCheckedCount++;
1651#endif
1652
1653 ipg_nic_rx(dev);
1654 }
1655
1656 /* If TxDMAComplete interrupt, free used TFDs. */
1657 if (status & IPG_IS_TX_DMA_COMPLETE)
1658 ipg_nic_txfree(dev);
1659
1660 /* TxComplete interrupts indicate one of numerous actions.
1661 * Determine what action to take based on TXSTATUS register.
1662 */
1663 if (status & IPG_IS_TX_COMPLETE)
1664 ipg_nic_txcleanup(dev);
1665
1666 /* If UpdateStats interrupt, update Linux Ethernet statistics */
1667 if (status & IPG_IS_UPDATE_STATS)
1668 ipg_nic_get_stats(dev);
1669
1670 /* If HostError interrupt, reset IPG. */
1671 if (status & IPG_IS_HOST_ERROR) {
1672 IPG_DDEBUG_MSG("HostError Interrupt\n");
1673
1674 schedule_delayed_work(&sp->task, 0);
1675 }
1676
1677 /* If LinkEvent interrupt, resolve autonegotiation. */
1678 if (status & IPG_IS_LINK_EVENT) {
1679 if (ipg_config_autoneg(dev) < 0)
1680 printk(KERN_INFO "%s: Auto-negotiation error.\n",
1681 dev->name);
1682 }
1683
1684 /* If MACCtrlFrame interrupt, do nothing. */
1685 if (status & IPG_IS_MAC_CTRL_FRAME)
1686 IPG_DEBUG_MSG("MACCtrlFrame interrupt.\n");
1687
1688 /* If RxComplete interrupt, do nothing. */
1689 if (status & IPG_IS_RX_COMPLETE)
1690 IPG_DEBUG_MSG("RxComplete interrupt.\n");
1691
1692 /* If RxEarly interrupt, do nothing. */
1693 if (status & IPG_IS_RX_EARLY)
1694 IPG_DEBUG_MSG("RxEarly interrupt.\n");
1695
1696out_enable:
1697 /* Re-enable IPG interrupts. */
1698 ipg_w16(IPG_IE_TX_DMA_COMPLETE | IPG_IE_RX_DMA_COMPLETE |
1699 IPG_IE_HOST_ERROR | IPG_IE_INT_REQUESTED | IPG_IE_TX_COMPLETE |
1700 IPG_IE_LINK_EVENT | IPG_IE_UPDATE_STATS, INT_ENABLE);
Francois Romieu227bc242008-01-10 23:25:30 +01001701out_unlock:
Francois Romieu1202d6f2007-09-17 17:13:55 -07001702 spin_unlock(&sp->lock);
Francois Romieu227bc242008-01-10 23:25:30 +01001703
Francois Romieu1202d6f2007-09-17 17:13:55 -07001704 return IRQ_RETVAL(handled);
1705}
1706
1707static void ipg_rx_clear(struct ipg_nic_private *sp)
1708{
1709 unsigned int i;
1710
1711 for (i = 0; i < IPG_RFDLIST_LENGTH; i++) {
Pekka Enberg9893ba12008-01-24 02:01:17 -08001712 if (sp->rx_buff[i]) {
Francois Romieu1202d6f2007-09-17 17:13:55 -07001713 struct ipg_rx *rxfd = sp->rxd + i;
1714
Pekka Enberg9893ba12008-01-24 02:01:17 -08001715 dev_kfree_skb_irq(sp->rx_buff[i]);
1716 sp->rx_buff[i] = NULL;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001717 pci_unmap_single(sp->pdev,
Al Viro325a8072007-10-14 19:41:29 +01001718 le64_to_cpu(rxfd->frag_info) & ~IPG_RFI_FRAGLEN,
Francois Romieu1202d6f2007-09-17 17:13:55 -07001719 sp->rx_buf_sz, PCI_DMA_FROMDEVICE);
1720 }
1721 }
1722}
1723
1724static void ipg_tx_clear(struct ipg_nic_private *sp)
1725{
1726 unsigned int i;
1727
1728 for (i = 0; i < IPG_TFDLIST_LENGTH; i++) {
Pekka Enberg9893ba12008-01-24 02:01:17 -08001729 if (sp->tx_buff[i]) {
Francois Romieu1202d6f2007-09-17 17:13:55 -07001730 struct ipg_tx *txfd = sp->txd + i;
1731
1732 pci_unmap_single(sp->pdev,
Al Viro325a8072007-10-14 19:41:29 +01001733 le64_to_cpu(txfd->frag_info) & ~IPG_TFI_FRAGLEN,
Pekka Enberg9893ba12008-01-24 02:01:17 -08001734 sp->tx_buff[i]->len, PCI_DMA_TODEVICE);
Francois Romieu1202d6f2007-09-17 17:13:55 -07001735
Pekka Enberg9893ba12008-01-24 02:01:17 -08001736 dev_kfree_skb_irq(sp->tx_buff[i]);
Francois Romieu1202d6f2007-09-17 17:13:55 -07001737
Pekka Enberg9893ba12008-01-24 02:01:17 -08001738 sp->tx_buff[i] = NULL;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001739 }
1740 }
1741}
1742
1743static int ipg_nic_open(struct net_device *dev)
1744{
1745 struct ipg_nic_private *sp = netdev_priv(dev);
1746 void __iomem *ioaddr = sp->ioaddr;
1747 struct pci_dev *pdev = sp->pdev;
1748 int rc;
1749
1750 IPG_DEBUG_MSG("_nic_open\n");
1751
1752 sp->rx_buf_sz = IPG_RXSUPPORT_SIZE;
1753
1754 /* Check for interrupt line conflicts, and request interrupt
1755 * line for IPG.
1756 *
1757 * IMPORTANT: Disable IPG interrupts prior to registering
1758 * IRQ.
1759 */
1760 ipg_w16(0x0000, INT_ENABLE);
1761
1762 /* Register the interrupt line to be used by the IPG within
1763 * the Linux system.
1764 */
1765 rc = request_irq(pdev->irq, &ipg_interrupt_handler, IRQF_SHARED,
1766 dev->name, dev);
1767 if (rc < 0) {
1768 printk(KERN_INFO "%s: Error when requesting interrupt.\n",
1769 dev->name);
1770 goto out;
1771 }
1772
1773 dev->irq = pdev->irq;
1774
1775 rc = -ENOMEM;
1776
1777 sp->rxd = dma_alloc_coherent(&pdev->dev, IPG_RX_RING_BYTES,
1778 &sp->rxd_map, GFP_KERNEL);
1779 if (!sp->rxd)
1780 goto err_free_irq_0;
1781
1782 sp->txd = dma_alloc_coherent(&pdev->dev, IPG_TX_RING_BYTES,
1783 &sp->txd_map, GFP_KERNEL);
1784 if (!sp->txd)
1785 goto err_free_rx_1;
1786
1787 rc = init_rfdlist(dev);
1788 if (rc < 0) {
1789 printk(KERN_INFO "%s: Error during configuration.\n",
1790 dev->name);
1791 goto err_free_tx_2;
1792 }
1793
1794 init_tfdlist(dev);
1795
1796 rc = ipg_io_config(dev);
1797 if (rc < 0) {
1798 printk(KERN_INFO "%s: Error during configuration.\n",
1799 dev->name);
1800 goto err_release_tfdlist_3;
1801 }
1802
1803 /* Resolve autonegotiation. */
1804 if (ipg_config_autoneg(dev) < 0)
1805 printk(KERN_INFO "%s: Auto-negotiation error.\n", dev->name);
1806
1807#ifdef JUMBO_FRAME
1808 /* initialize JUMBO Frame control variable */
Pekka Enberg9893ba12008-01-24 02:01:17 -08001809 sp->jumbo.found_start = 0;
1810 sp->jumbo.current_size = 0;
1811 sp->jumbo.skb = 0;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001812 dev->mtu = IPG_TXFRAG_SIZE;
1813#endif
1814
1815 /* Enable transmit and receive operation of the IPG. */
1816 ipg_w32((ipg_r32(MAC_CTRL) | IPG_MC_RX_ENABLE | IPG_MC_TX_ENABLE) &
1817 IPG_MC_RSVD_MASK, MAC_CTRL);
1818
1819 netif_start_queue(dev);
1820out:
1821 return rc;
1822
1823err_release_tfdlist_3:
1824 ipg_tx_clear(sp);
1825 ipg_rx_clear(sp);
1826err_free_tx_2:
1827 dma_free_coherent(&pdev->dev, IPG_TX_RING_BYTES, sp->txd, sp->txd_map);
1828err_free_rx_1:
1829 dma_free_coherent(&pdev->dev, IPG_RX_RING_BYTES, sp->rxd, sp->rxd_map);
1830err_free_irq_0:
1831 free_irq(pdev->irq, dev);
1832 goto out;
1833}
1834
1835static int ipg_nic_stop(struct net_device *dev)
1836{
1837 struct ipg_nic_private *sp = netdev_priv(dev);
1838 void __iomem *ioaddr = sp->ioaddr;
1839 struct pci_dev *pdev = sp->pdev;
1840
1841 IPG_DEBUG_MSG("_nic_stop\n");
1842
1843 netif_stop_queue(dev);
1844
1845 IPG_DDEBUG_MSG("RFDlistendCount = %i\n", sp->RFDlistendCount);
1846 IPG_DDEBUG_MSG("RFDListCheckedCount = %i\n", sp->rxdCheckedCount);
1847 IPG_DDEBUG_MSG("EmptyRFDListCount = %i\n", sp->EmptyRFDListCount);
1848 IPG_DUMPTFDLIST(dev);
1849
1850 do {
1851 (void) ipg_r16(INT_STATUS_ACK);
1852
1853 ipg_reset(dev, IPG_AC_GLOBAL_RESET | IPG_AC_HOST | IPG_AC_DMA);
1854
1855 synchronize_irq(pdev->irq);
1856 } while (ipg_r16(INT_ENABLE) & IPG_IE_RSVD_MASK);
1857
1858 ipg_rx_clear(sp);
1859
1860 ipg_tx_clear(sp);
1861
1862 pci_free_consistent(pdev, IPG_RX_RING_BYTES, sp->rxd, sp->rxd_map);
1863 pci_free_consistent(pdev, IPG_TX_RING_BYTES, sp->txd, sp->txd_map);
1864
1865 free_irq(pdev->irq, dev);
1866
1867 return 0;
1868}
1869
1870static int ipg_nic_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
1871{
1872 struct ipg_nic_private *sp = netdev_priv(dev);
1873 void __iomem *ioaddr = sp->ioaddr;
1874 unsigned int entry = sp->tx_current % IPG_TFDLIST_LENGTH;
1875 unsigned long flags;
1876 struct ipg_tx *txfd;
1877
1878 IPG_DDEBUG_MSG("_nic_hard_start_xmit\n");
1879
1880 /* If in 10Mbps mode, stop the transmit queue so
1881 * no more transmit frames are accepted.
1882 */
1883 if (sp->tenmbpsmode)
1884 netif_stop_queue(dev);
1885
Pekka Enberg9893ba12008-01-24 02:01:17 -08001886 if (sp->reset_current_tfd) {
1887 sp->reset_current_tfd = 0;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001888 entry = 0;
1889 }
1890
1891 txfd = sp->txd + entry;
1892
Pekka Enberg9893ba12008-01-24 02:01:17 -08001893 sp->tx_buff[entry] = skb;
Francois Romieu1202d6f2007-09-17 17:13:55 -07001894
1895 /* Clear all TFC fields, except TFDDONE. */
1896 txfd->tfc = cpu_to_le64(IPG_TFC_TFDDONE);
1897
1898 /* Specify the TFC field within the TFD. */
1899 txfd->tfc |= cpu_to_le64(IPG_TFC_WORDALIGNDISABLED |
Al Viro48f5fec2008-03-16 22:22:14 +00001900 (IPG_TFC_FRAMEID & sp->tx_current) |
Francois Romieu1202d6f2007-09-17 17:13:55 -07001901 (IPG_TFC_FRAGCOUNT & (1 << 24)));
Al Viro48f5fec2008-03-16 22:22:14 +00001902 /*
1903 * 16--17 (WordAlign) <- 3 (disable),
1904 * 0--15 (FrameId) <- sp->tx_current,
1905 * 24--27 (FragCount) <- 1
1906 */
Francois Romieu1202d6f2007-09-17 17:13:55 -07001907
1908 /* Request TxComplete interrupts at an interval defined
1909 * by the constant IPG_FRAMESBETWEENTXCOMPLETES.
1910 * Request TxComplete interrupt for every frame
1911 * if in 10Mbps mode to accomodate problem with 10Mbps
1912 * processing.
1913 */
1914 if (sp->tenmbpsmode)
1915 txfd->tfc |= cpu_to_le64(IPG_TFC_TXINDICATE);
Francois Romieu47cccd72008-01-10 23:53:15 +01001916 txfd->tfc |= cpu_to_le64(IPG_TFC_TXDMAINDICATE);
Francois Romieu1202d6f2007-09-17 17:13:55 -07001917 /* Based on compilation option, determine if FCS is to be
1918 * appended to transmit frame by IPG.
1919 */
1920 if (!(IPG_APPEND_FCS_ON_TX))
1921 txfd->tfc |= cpu_to_le64(IPG_TFC_FCSAPPENDDISABLE);
1922
1923 /* Based on compilation option, determine if IP, TCP and/or
1924 * UDP checksums are to be added to transmit frame by IPG.
1925 */
1926 if (IPG_ADD_IPCHECKSUM_ON_TX)
1927 txfd->tfc |= cpu_to_le64(IPG_TFC_IPCHECKSUMENABLE);
1928
1929 if (IPG_ADD_TCPCHECKSUM_ON_TX)
1930 txfd->tfc |= cpu_to_le64(IPG_TFC_TCPCHECKSUMENABLE);
1931
1932 if (IPG_ADD_UDPCHECKSUM_ON_TX)
1933 txfd->tfc |= cpu_to_le64(IPG_TFC_UDPCHECKSUMENABLE);
1934
1935 /* Based on compilation option, determine if VLAN tag info is to be
1936 * inserted into transmit frame by IPG.
1937 */
1938 if (IPG_INSERT_MANUAL_VLAN_TAG) {
1939 txfd->tfc |= cpu_to_le64(IPG_TFC_VLANTAGINSERT |
1940 ((u64) IPG_MANUAL_VLAN_VID << 32) |
1941 ((u64) IPG_MANUAL_VLAN_CFI << 44) |
1942 ((u64) IPG_MANUAL_VLAN_USERPRIORITY << 45));
1943 }
1944
1945 /* The fragment start location within system memory is defined
1946 * by the sk_buff structure's data field. The physical address
1947 * of this location within the system's virtual memory space
1948 * is determined using the IPG_HOST2BUS_MAP function.
1949 */
1950 txfd->frag_info = cpu_to_le64(pci_map_single(sp->pdev, skb->data,
1951 skb->len, PCI_DMA_TODEVICE));
1952
1953 /* The length of the fragment within system memory is defined by
1954 * the sk_buff structure's len field.
1955 */
1956 txfd->frag_info |= cpu_to_le64(IPG_TFI_FRAGLEN &
1957 ((u64) (skb->len & 0xffff) << 48));
1958
1959 /* Clear the TFDDone bit last to indicate the TFD is ready
1960 * for transfer to the IPG.
1961 */
1962 txfd->tfc &= cpu_to_le64(~IPG_TFC_TFDDONE);
1963
1964 spin_lock_irqsave(&sp->lock, flags);
1965
1966 sp->tx_current++;
1967
1968 mmiowb();
1969
1970 ipg_w32(IPG_DC_TX_DMA_POLL_NOW, DMA_CTRL);
1971
1972 if (sp->tx_current == (sp->tx_dirty + IPG_TFDLIST_LENGTH))
Francois Romieudafdec72008-01-10 23:45:05 +01001973 netif_stop_queue(dev);
Francois Romieu1202d6f2007-09-17 17:13:55 -07001974
1975 spin_unlock_irqrestore(&sp->lock, flags);
1976
1977 return NETDEV_TX_OK;
1978}
1979
1980static void ipg_set_phy_default_param(unsigned char rev,
1981 struct net_device *dev, int phy_address)
1982{
1983 unsigned short length;
1984 unsigned char revision;
1985 unsigned short *phy_param;
1986 unsigned short address, value;
1987
1988 phy_param = &DefaultPhyParam[0];
1989 length = *phy_param & 0x00FF;
1990 revision = (unsigned char)((*phy_param) >> 8);
1991 phy_param++;
1992 while (length != 0) {
1993 if (rev == revision) {
1994 while (length > 1) {
1995 address = *phy_param;
1996 value = *(phy_param + 1);
1997 phy_param += 2;
1998 mdio_write(dev, phy_address, address, value);
1999 length -= 4;
2000 }
2001 break;
2002 } else {
2003 phy_param += length / 2;
2004 length = *phy_param & 0x00FF;
2005 revision = (unsigned char)((*phy_param) >> 8);
2006 phy_param++;
2007 }
2008 }
2009}
2010
Francois Romieu1202d6f2007-09-17 17:13:55 -07002011static int read_eeprom(struct net_device *dev, int eep_addr)
2012{
2013 void __iomem *ioaddr = ipg_ioaddr(dev);
2014 unsigned int i;
2015 int ret = 0;
2016 u16 value;
2017
2018 value = IPG_EC_EEPROM_READOPCODE | (eep_addr & 0xff);
2019 ipg_w16(value, EEPROM_CTRL);
2020
2021 for (i = 0; i < 1000; i++) {
2022 u16 data;
2023
2024 mdelay(10);
2025 data = ipg_r16(EEPROM_CTRL);
2026 if (!(data & IPG_EC_EEPROM_BUSY)) {
2027 ret = ipg_r16(EEPROM_DATA);
2028 break;
2029 }
2030 }
2031 return ret;
2032}
2033
2034static void ipg_init_mii(struct net_device *dev)
2035{
2036 struct ipg_nic_private *sp = netdev_priv(dev);
2037 struct mii_if_info *mii_if = &sp->mii_if;
2038 int phyaddr;
2039
2040 mii_if->dev = dev;
2041 mii_if->mdio_read = mdio_read;
2042 mii_if->mdio_write = mdio_write;
2043 mii_if->phy_id_mask = 0x1f;
2044 mii_if->reg_num_mask = 0x1f;
2045
2046 mii_if->phy_id = phyaddr = ipg_find_phyaddr(dev);
2047
2048 if (phyaddr != 0x1f) {
2049 u16 mii_phyctrl, mii_1000cr;
2050 u8 revisionid = 0;
2051
2052 mii_1000cr = mdio_read(dev, phyaddr, MII_CTRL1000);
2053 mii_1000cr |= ADVERTISE_1000FULL | ADVERTISE_1000HALF |
2054 GMII_PHY_1000BASETCONTROL_PreferMaster;
2055 mdio_write(dev, phyaddr, MII_CTRL1000, mii_1000cr);
2056
2057 mii_phyctrl = mdio_read(dev, phyaddr, MII_BMCR);
2058
2059 /* Set default phyparam */
2060 pci_read_config_byte(sp->pdev, PCI_REVISION_ID, &revisionid);
2061 ipg_set_phy_default_param(revisionid, dev, phyaddr);
2062
2063 /* Reset PHY */
2064 mii_phyctrl |= BMCR_RESET | BMCR_ANRESTART;
2065 mdio_write(dev, phyaddr, MII_BMCR, mii_phyctrl);
2066
2067 }
2068}
2069
2070static int ipg_hw_init(struct net_device *dev)
2071{
2072 struct ipg_nic_private *sp = netdev_priv(dev);
2073 void __iomem *ioaddr = sp->ioaddr;
2074 unsigned int i;
2075 int rc;
2076
Pekka Enbergdea4a872007-11-30 09:54:51 +02002077 /* Read/Write and Reset EEPROM Value */
Francois Romieu1202d6f2007-09-17 17:13:55 -07002078 /* Read LED Mode Configuration from EEPROM */
Pekka Enberg9893ba12008-01-24 02:01:17 -08002079 sp->led_mode = read_eeprom(dev, 6);
Francois Romieu1202d6f2007-09-17 17:13:55 -07002080
2081 /* Reset all functions within the IPG. Do not assert
2082 * RST_OUT as not compatible with some PHYs.
2083 */
2084 rc = ipg_reset(dev, IPG_RESET_MASK);
2085 if (rc < 0)
2086 goto out;
2087
2088 ipg_init_mii(dev);
2089
2090 /* Read MAC Address from EEPROM */
2091 for (i = 0; i < 3; i++)
2092 sp->station_addr[i] = read_eeprom(dev, 16 + i);
2093
2094 for (i = 0; i < 3; i++)
2095 ipg_w16(sp->station_addr[i], STATION_ADDRESS_0 + 2*i);
2096
2097 /* Set station address in ethernet_device structure. */
2098 dev->dev_addr[0] = ipg_r16(STATION_ADDRESS_0) & 0x00ff;
2099 dev->dev_addr[1] = (ipg_r16(STATION_ADDRESS_0) & 0xff00) >> 8;
2100 dev->dev_addr[2] = ipg_r16(STATION_ADDRESS_1) & 0x00ff;
2101 dev->dev_addr[3] = (ipg_r16(STATION_ADDRESS_1) & 0xff00) >> 8;
2102 dev->dev_addr[4] = ipg_r16(STATION_ADDRESS_2) & 0x00ff;
2103 dev->dev_addr[5] = (ipg_r16(STATION_ADDRESS_2) & 0xff00) >> 8;
2104out:
2105 return rc;
2106}
2107
2108static int ipg_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
2109{
2110 struct ipg_nic_private *sp = netdev_priv(dev);
2111 int rc;
2112
2113 mutex_lock(&sp->mii_mutex);
2114 rc = generic_mii_ioctl(&sp->mii_if, if_mii(ifr), cmd, NULL);
2115 mutex_unlock(&sp->mii_mutex);
2116
2117 return rc;
2118}
2119
2120static int ipg_nic_change_mtu(struct net_device *dev, int new_mtu)
2121{
2122 /* Function to accomodate changes to Maximum Transfer Unit
2123 * (or MTU) of IPG NIC. Cannot use default function since
2124 * the default will not allow for MTU > 1500 bytes.
2125 */
2126
2127 IPG_DEBUG_MSG("_nic_change_mtu\n");
2128
2129 /* Check that the new MTU value is between 68 (14 byte header, 46
2130 * byte payload, 4 byte FCS) and IPG_MAX_RXFRAME_SIZE, which
2131 * corresponds to the MAXFRAMESIZE register in the IPG.
2132 */
2133 if ((new_mtu < 68) || (new_mtu > IPG_MAX_RXFRAME_SIZE))
2134 return -EINVAL;
2135
2136 dev->mtu = new_mtu;
2137
2138 return 0;
2139}
2140
2141static int ipg_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2142{
2143 struct ipg_nic_private *sp = netdev_priv(dev);
2144 int rc;
2145
2146 mutex_lock(&sp->mii_mutex);
2147 rc = mii_ethtool_gset(&sp->mii_if, cmd);
2148 mutex_unlock(&sp->mii_mutex);
2149
2150 return rc;
2151}
2152
2153static int ipg_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
2154{
2155 struct ipg_nic_private *sp = netdev_priv(dev);
2156 int rc;
2157
2158 mutex_lock(&sp->mii_mutex);
2159 rc = mii_ethtool_sset(&sp->mii_if, cmd);
2160 mutex_unlock(&sp->mii_mutex);
2161
2162 return rc;
2163}
2164
2165static int ipg_nway_reset(struct net_device *dev)
2166{
2167 struct ipg_nic_private *sp = netdev_priv(dev);
2168 int rc;
2169
2170 mutex_lock(&sp->mii_mutex);
2171 rc = mii_nway_restart(&sp->mii_if);
2172 mutex_unlock(&sp->mii_mutex);
2173
2174 return rc;
2175}
2176
2177static struct ethtool_ops ipg_ethtool_ops = {
2178 .get_settings = ipg_get_settings,
2179 .set_settings = ipg_set_settings,
2180 .nway_reset = ipg_nway_reset,
2181};
2182
Adrian Bunkef312242007-12-11 23:20:30 +01002183static void __devexit ipg_remove(struct pci_dev *pdev)
Francois Romieu1202d6f2007-09-17 17:13:55 -07002184{
2185 struct net_device *dev = pci_get_drvdata(pdev);
2186 struct ipg_nic_private *sp = netdev_priv(dev);
2187
2188 IPG_DEBUG_MSG("_remove\n");
2189
2190 /* Un-register Ethernet device. */
2191 unregister_netdev(dev);
2192
2193 pci_iounmap(pdev, sp->ioaddr);
2194
2195 pci_release_regions(pdev);
2196
2197 free_netdev(dev);
2198 pci_disable_device(pdev);
2199 pci_set_drvdata(pdev, NULL);
2200}
2201
2202static int __devinit ipg_probe(struct pci_dev *pdev,
2203 const struct pci_device_id *id)
2204{
2205 unsigned int i = id->driver_data;
2206 struct ipg_nic_private *sp;
2207 struct net_device *dev;
2208 void __iomem *ioaddr;
2209 int rc;
2210
2211 rc = pci_enable_device(pdev);
2212 if (rc < 0)
2213 goto out;
2214
2215 printk(KERN_INFO "%s: %s\n", pci_name(pdev), ipg_brand_name[i]);
2216
2217 pci_set_master(pdev);
2218
2219 rc = pci_set_dma_mask(pdev, DMA_40BIT_MASK);
2220 if (rc < 0) {
2221 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2222 if (rc < 0) {
2223 printk(KERN_ERR "%s: DMA config failed.\n",
2224 pci_name(pdev));
2225 goto err_disable_0;
2226 }
2227 }
2228
2229 /*
2230 * Initialize net device.
2231 */
2232 dev = alloc_etherdev(sizeof(struct ipg_nic_private));
2233 if (!dev) {
2234 printk(KERN_ERR "%s: alloc_etherdev failed\n", pci_name(pdev));
2235 rc = -ENOMEM;
2236 goto err_disable_0;
2237 }
2238
2239 sp = netdev_priv(dev);
2240 spin_lock_init(&sp->lock);
2241 mutex_init(&sp->mii_mutex);
2242
2243 /* Declare IPG NIC functions for Ethernet device methods.
2244 */
2245 dev->open = &ipg_nic_open;
2246 dev->stop = &ipg_nic_stop;
2247 dev->hard_start_xmit = &ipg_nic_hard_start_xmit;
2248 dev->get_stats = &ipg_nic_get_stats;
2249 dev->set_multicast_list = &ipg_nic_set_multicast_list;
2250 dev->do_ioctl = ipg_ioctl;
2251 dev->tx_timeout = ipg_tx_timeout;
2252 dev->change_mtu = &ipg_nic_change_mtu;
2253
2254 SET_NETDEV_DEV(dev, &pdev->dev);
2255 SET_ETHTOOL_OPS(dev, &ipg_ethtool_ops);
2256
2257 rc = pci_request_regions(pdev, DRV_NAME);
2258 if (rc)
2259 goto err_free_dev_1;
2260
2261 ioaddr = pci_iomap(pdev, 1, pci_resource_len(pdev, 1));
2262 if (!ioaddr) {
2263 printk(KERN_ERR "%s cannot map MMIO\n", pci_name(pdev));
2264 rc = -EIO;
2265 goto err_release_regions_2;
2266 }
2267
2268 /* Save the pointer to the PCI device information. */
2269 sp->ioaddr = ioaddr;
2270 sp->pdev = pdev;
2271 sp->dev = dev;
2272
2273 INIT_DELAYED_WORK(&sp->task, ipg_reset_after_host_error);
2274
2275 pci_set_drvdata(pdev, dev);
2276
2277 rc = ipg_hw_init(dev);
2278 if (rc < 0)
2279 goto err_unmap_3;
2280
2281 rc = register_netdev(dev);
2282 if (rc < 0)
2283 goto err_unmap_3;
2284
2285 printk(KERN_INFO "Ethernet device registered as: %s\n", dev->name);
2286out:
2287 return rc;
2288
2289err_unmap_3:
2290 pci_iounmap(pdev, ioaddr);
2291err_release_regions_2:
2292 pci_release_regions(pdev);
2293err_free_dev_1:
2294 free_netdev(dev);
2295err_disable_0:
2296 pci_disable_device(pdev);
2297 goto out;
2298}
2299
2300static struct pci_driver ipg_pci_driver = {
2301 .name = IPG_DRIVER_NAME,
2302 .id_table = ipg_pci_tbl,
2303 .probe = ipg_probe,
2304 .remove = __devexit_p(ipg_remove),
2305};
2306
2307static int __init ipg_init_module(void)
2308{
2309 return pci_register_driver(&ipg_pci_driver);
2310}
2311
2312static void __exit ipg_exit_module(void)
2313{
2314 pci_unregister_driver(&ipg_pci_driver);
2315}
2316
2317module_init(ipg_init_module);
2318module_exit(ipg_exit_module);