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added 2.6.29.6 aldebaran kernel
[nao-ulib.git] / kernel / 2.6.29.6-aldebaran-rt / drivers / net / e100.c
blob86bb876fb123a312088b7d3edae3e4f91c2771e4
1 /*******************************************************************************
2
3 Intel PRO/100 Linux driver
4 Copyright(c) 1999 - 2006 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27 *******************************************************************************/
28
29 /*
30 * e100.c: Intel(R) PRO/100 ethernet driver
31 *
32 * (Re)written 2003 by scott.feldman@intel.com. Based loosely on
33 * original e100 driver, but better described as a munging of
34 * e100, e1000, eepro100, tg3, 8139cp, and other drivers.
35 *
36 * References:
37 * Intel 8255x 10/100 Mbps Ethernet Controller Family,
38 * Open Source Software Developers Manual,
39 * http://sourceforge.net/projects/e1000
40 *
41 *
42 * Theory of Operation
43 *
44 * I. General
45 *
46 * The driver supports Intel(R) 10/100 Mbps PCI Fast Ethernet
47 * controller family, which includes the 82557, 82558, 82559, 82550,
48 * 82551, and 82562 devices. 82558 and greater controllers
49 * integrate the Intel 82555 PHY. The controllers are used in
50 * server and client network interface cards, as well as in
51 * LAN-On-Motherboard (LOM), CardBus, MiniPCI, and ICHx
52 * configurations. 8255x supports a 32-bit linear addressing
53 * mode and operates at 33Mhz PCI clock rate.
54 *
55 * II. Driver Operation
56 *
57 * Memory-mapped mode is used exclusively to access the device's
58 * shared-memory structure, the Control/Status Registers (CSR). All
59 * setup, configuration, and control of the device, including queuing
60 * of Tx, Rx, and configuration commands is through the CSR.
61 * cmd_lock serializes accesses to the CSR command register. cb_lock
62 * protects the shared Command Block List (CBL).
63 *
64 * 8255x is highly MII-compliant and all access to the PHY go
65 * through the Management Data Interface (MDI). Consequently, the
66 * driver leverages the mii.c library shared with other MII-compliant
67 * devices.
68 *
69 * Big- and Little-Endian byte order as well as 32- and 64-bit
70 * archs are supported. Weak-ordered memory and non-cache-coherent
71 * archs are supported.
72 *
73 * III. Transmit
74 *
75 * A Tx skb is mapped and hangs off of a TCB. TCBs are linked
76 * together in a fixed-size ring (CBL) thus forming the flexible mode
77 * memory structure. A TCB marked with the suspend-bit indicates
78 * the end of the ring. The last TCB processed suspends the
79 * controller, and the controller can be restarted by issue a CU
80 * resume command to continue from the suspend point, or a CU start
81 * command to start at a given position in the ring.
82 *
83 * Non-Tx commands (config, multicast setup, etc) are linked
84 * into the CBL ring along with Tx commands. The common structure
85 * used for both Tx and non-Tx commands is the Command Block (CB).
86 *
87 * cb_to_use is the next CB to use for queuing a command; cb_to_clean
88 * is the next CB to check for completion; cb_to_send is the first
89 * CB to start on in case of a previous failure to resume. CB clean
90 * up happens in interrupt context in response to a CU interrupt.
91 * cbs_avail keeps track of number of free CB resources available.
92 *
93 * Hardware padding of short packets to minimum packet size is
94 * enabled. 82557 pads with 7Eh, while the later controllers pad
95 * with 00h.
96 *
97 * IV. Receive
98 *
99 * The Receive Frame Area (RFA) comprises a ring of Receive Frame
100 * Descriptors (RFD) + data buffer, thus forming the simplified mode
101 * memory structure. Rx skbs are allocated to contain both the RFD
102 * and the data buffer, but the RFD is pulled off before the skb is
103 * indicated. The data buffer is aligned such that encapsulated
104 * protocol headers are u32-aligned. Since the RFD is part of the
105 * mapped shared memory, and completion status is contained within
106 * the RFD, the RFD must be dma_sync'ed to maintain a consistent
107 * view from software and hardware.
108 *
109 * In order to keep updates to the RFD link field from colliding with
110 * hardware writes to mark packets complete, we use the feature that
111 * hardware will not write to a size 0 descriptor and mark the previous
112 * packet as end-of-list (EL). After updating the link, we remove EL
113 * and only then restore the size such that hardware may use the
114 * previous-to-end RFD.
115 *
116 * Under typical operation, the receive unit (RU) is start once,
117 * and the controller happily fills RFDs as frames arrive. If
118 * replacement RFDs cannot be allocated, or the RU goes non-active,
119 * the RU must be restarted. Frame arrival generates an interrupt,
120 * and Rx indication and re-allocation happen in the same context,
121 * therefore no locking is required. A software-generated interrupt
122 * is generated from the watchdog to recover from a failed allocation
123 * scenario where all Rx resources have been indicated and none re-
124 * placed.
125 *
126 * V. Miscellaneous
127 *
128 * VLAN offloading of tagging, stripping and filtering is not
129 * supported, but driver will accommodate the extra 4-byte VLAN tag
130 * for processing by upper layers. Tx/Rx Checksum offloading is not
131 * supported. Tx Scatter/Gather is not supported. Jumbo Frames is
132 * not supported (hardware limitation).
133 *
134 * MagicPacket(tm) WoL support is enabled/disabled via ethtool.
135 *
136 * Thanks to JC (jchapman@katalix.com) for helping with
137 * testing/troubleshooting the development driver.
138 *
139 * TODO:
140 * o several entry points race with dev->close
141 * o check for tx-no-resources/stop Q races with tx clean/wake Q
142 *
143 * FIXES:
144 * 2005/12/02 - Michael O'Donnell <Michael.ODonnell at stratus dot com>
145 * - Stratus87247: protect MDI control register manipulations
146 */
147
148 #include <linux/module.h>
149 #include <linux/moduleparam.h>
150 #include <linux/kernel.h>
151 #include <linux/types.h>
152 #include <linux/slab.h>
153 #include <linux/delay.h>
154 #include <linux/init.h>
155 #include <linux/pci.h>
156 #include <linux/dma-mapping.h>
157 #include <linux/netdevice.h>
158 #include <linux/etherdevice.h>
159 #include <linux/mii.h>
160 #include <linux/if_vlan.h>
161 #include <linux/skbuff.h>
162 #include <linux/ethtool.h>
163 #include <linux/string.h>
164 #include <linux/firmware.h>
165 #include <asm/unaligned.h>
166
167
168 #define DRV_NAME "e100"
169 #define DRV_EXT "-NAPI"
170 #define DRV_VERSION "3.5.23-k6"DRV_EXT
171 #define DRV_DESCRIPTION "Intel(R) PRO/100 Network Driver"
172 #define DRV_COPYRIGHT "Copyright(c) 1999-2006 Intel Corporation"
173 #define PFX DRV_NAME ": "
174
175 #define E100_WATCHDOG_PERIOD (2 * HZ)
176 #define E100_NAPI_WEIGHT 16
177
178 #define FIRMWARE_D101M "e100/d101m_ucode.bin"
179 #define FIRMWARE_D101S "e100/d101s_ucode.bin"
180 #define FIRMWARE_D102E "e100/d102e_ucode.bin"
181
182 MODULE_DESCRIPTION(DRV_DESCRIPTION);
183 MODULE_AUTHOR(DRV_COPYRIGHT);
184 MODULE_LICENSE("GPL");
185 MODULE_VERSION(DRV_VERSION);
186 MODULE_FIRMWARE(FIRMWARE_D101M);
187 MODULE_FIRMWARE(FIRMWARE_D101S);
188 MODULE_FIRMWARE(FIRMWARE_D102E);
189
190 static int debug = 3;
191 static int eeprom_bad_csum_allow = 0;
192 static int use_io = 0;
193 module_param(debug, int, 0);
194 module_param(eeprom_bad_csum_allow, int, 0);
195 module_param(use_io, int, 0);
196 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
197 MODULE_PARM_DESC(eeprom_bad_csum_allow, "Allow bad eeprom checksums");
198 MODULE_PARM_DESC(use_io, "Force use of i/o access mode");
199 #define DPRINTK(nlevel, klevel, fmt, args...) \
200 (void)((NETIF_MSG_##nlevel & nic->msg_enable) && \
201 printk(KERN_##klevel PFX "%s: %s: " fmt, nic->netdev->name, \
202 __func__ , ## args))
203
204 #define INTEL_8255X_ETHERNET_DEVICE(device_id, ich) {\
205 PCI_VENDOR_ID_INTEL, device_id, PCI_ANY_ID, PCI_ANY_ID, \
206 PCI_CLASS_NETWORK_ETHERNET << 8, 0xFFFF00, ich }
207 static struct pci_device_id e100_id_table[] = {
208 INTEL_8255X_ETHERNET_DEVICE(0x1029, 0),
209 INTEL_8255X_ETHERNET_DEVICE(0x1030, 0),
210 INTEL_8255X_ETHERNET_DEVICE(0x1031, 3),
211 INTEL_8255X_ETHERNET_DEVICE(0x1032, 3),
212 INTEL_8255X_ETHERNET_DEVICE(0x1033, 3),
213 INTEL_8255X_ETHERNET_DEVICE(0x1034, 3),
214 INTEL_8255X_ETHERNET_DEVICE(0x1038, 3),
215 INTEL_8255X_ETHERNET_DEVICE(0x1039, 4),
216 INTEL_8255X_ETHERNET_DEVICE(0x103A, 4),
217 INTEL_8255X_ETHERNET_DEVICE(0x103B, 4),
218 INTEL_8255X_ETHERNET_DEVICE(0x103C, 4),
219 INTEL_8255X_ETHERNET_DEVICE(0x103D, 4),
220 INTEL_8255X_ETHERNET_DEVICE(0x103E, 4),
221 INTEL_8255X_ETHERNET_DEVICE(0x1050, 5),
222 INTEL_8255X_ETHERNET_DEVICE(0x1051, 5),
223 INTEL_8255X_ETHERNET_DEVICE(0x1052, 5),
224 INTEL_8255X_ETHERNET_DEVICE(0x1053, 5),
225 INTEL_8255X_ETHERNET_DEVICE(0x1054, 5),
226 INTEL_8255X_ETHERNET_DEVICE(0x1055, 5),
227 INTEL_8255X_ETHERNET_DEVICE(0x1056, 5),
228 INTEL_8255X_ETHERNET_DEVICE(0x1057, 5),
229 INTEL_8255X_ETHERNET_DEVICE(0x1059, 0),
230 INTEL_8255X_ETHERNET_DEVICE(0x1064, 6),
231 INTEL_8255X_ETHERNET_DEVICE(0x1065, 6),
232 INTEL_8255X_ETHERNET_DEVICE(0x1066, 6),
233 INTEL_8255X_ETHERNET_DEVICE(0x1067, 6),
234 INTEL_8255X_ETHERNET_DEVICE(0x1068, 6),
235 INTEL_8255X_ETHERNET_DEVICE(0x1069, 6),
236 INTEL_8255X_ETHERNET_DEVICE(0x106A, 6),
237 INTEL_8255X_ETHERNET_DEVICE(0x106B, 6),
238 INTEL_8255X_ETHERNET_DEVICE(0x1091, 7),
239 INTEL_8255X_ETHERNET_DEVICE(0x1092, 7),
240 INTEL_8255X_ETHERNET_DEVICE(0x1093, 7),
241 INTEL_8255X_ETHERNET_DEVICE(0x1094, 7),
242 INTEL_8255X_ETHERNET_DEVICE(0x1095, 7),
243 INTEL_8255X_ETHERNET_DEVICE(0x1209, 0),
244 INTEL_8255X_ETHERNET_DEVICE(0x1229, 0),
245 INTEL_8255X_ETHERNET_DEVICE(0x2449, 2),
246 INTEL_8255X_ETHERNET_DEVICE(0x2459, 2),
247 INTEL_8255X_ETHERNET_DEVICE(0x245D, 2),
248 INTEL_8255X_ETHERNET_DEVICE(0x27DC, 7),
249 { 0, }
250 };
251 MODULE_DEVICE_TABLE(pci, e100_id_table);
252
253 enum mac {
254 mac_82557_D100_A = 0,
255 mac_82557_D100_B = 1,
256 mac_82557_D100_C = 2,
257 mac_82558_D101_A4 = 4,
258 mac_82558_D101_B0 = 5,
259 mac_82559_D101M = 8,
260 mac_82559_D101S = 9,
261 mac_82550_D102 = 12,
262 mac_82550_D102_C = 13,
263 mac_82551_E = 14,
264 mac_82551_F = 15,
265 mac_82551_10 = 16,
266 mac_unknown = 0xFF,
267 };
268
269 enum phy {
270 phy_100a = 0x000003E0,
271 phy_100c = 0x035002A8,
272 phy_82555_tx = 0x015002A8,
273 phy_nsc_tx = 0x5C002000,
274 phy_82562_et = 0x033002A8,
275 phy_82562_em = 0x032002A8,
276 phy_82562_ek = 0x031002A8,
277 phy_82562_eh = 0x017002A8,
278 phy_unknown = 0xFFFFFFFF,
279 };
280
281 /* CSR (Control/Status Registers) */
282 struct csr {
283 struct {
284 u8 status;
285 u8 stat_ack;
286 u8 cmd_lo;
287 u8 cmd_hi;
288 u32 gen_ptr;
289 } scb;
290 u32 port;
291 u16 flash_ctrl;
292 u8 eeprom_ctrl_lo;
293 u8 eeprom_ctrl_hi;
294 u32 mdi_ctrl;
295 u32 rx_dma_count;
296 };
297
298 enum scb_status {
299 rus_no_res = 0x08,
300 rus_ready = 0x10,
301 rus_mask = 0x3C,
302 };
303
304 enum ru_state {
305 RU_SUSPENDED = 0,
306 RU_RUNNING = 1,
307 RU_UNINITIALIZED = -1,
308 };
309
310 enum scb_stat_ack {
311 stat_ack_not_ours = 0x00,
312 stat_ack_sw_gen = 0x04,
313 stat_ack_rnr = 0x10,
314 stat_ack_cu_idle = 0x20,
315 stat_ack_frame_rx = 0x40,
316 stat_ack_cu_cmd_done = 0x80,
317 stat_ack_not_present = 0xFF,
318 stat_ack_rx = (stat_ack_sw_gen | stat_ack_rnr | stat_ack_frame_rx),
319 stat_ack_tx = (stat_ack_cu_idle | stat_ack_cu_cmd_done),
320 };
321
322 enum scb_cmd_hi {
323 irq_mask_none = 0x00,
324 irq_mask_all = 0x01,
325 irq_sw_gen = 0x02,
326 };
327
328 enum scb_cmd_lo {
329 cuc_nop = 0x00,
330 ruc_start = 0x01,
331 ruc_load_base = 0x06,
332 cuc_start = 0x10,
333 cuc_resume = 0x20,
334 cuc_dump_addr = 0x40,
335 cuc_dump_stats = 0x50,
336 cuc_load_base = 0x60,
337 cuc_dump_reset = 0x70,
338 };
339
340 enum cuc_dump {
341 cuc_dump_complete = 0x0000A005,
342 cuc_dump_reset_complete = 0x0000A007,
343 };
344
345 enum port {
346 software_reset = 0x0000,
347 selftest = 0x0001,
348 selective_reset = 0x0002,
349 };
350
351 enum eeprom_ctrl_lo {
352 eesk = 0x01,
353 eecs = 0x02,
354 eedi = 0x04,
355 eedo = 0x08,
356 };
357
358 enum mdi_ctrl {
359 mdi_write = 0x04000000,
360 mdi_read = 0x08000000,
361 mdi_ready = 0x10000000,
362 };
363
364 enum eeprom_op {
365 op_write = 0x05,
366 op_read = 0x06,
367 op_ewds = 0x10,
368 op_ewen = 0x13,
369 };
370
371 enum eeprom_offsets {
372 eeprom_cnfg_mdix = 0x03,
373 eeprom_id = 0x0A,
374 eeprom_config_asf = 0x0D,
375 eeprom_smbus_addr = 0x90,
376 };
377
378 enum eeprom_cnfg_mdix {
379 eeprom_mdix_enabled = 0x0080,
380 };
381
382 enum eeprom_id {
383 eeprom_id_wol = 0x0020,
384 };
385
386 enum eeprom_config_asf {
387 eeprom_asf = 0x8000,
388 eeprom_gcl = 0x4000,
389 };
390
391 enum cb_status {
392 cb_complete = 0x8000,
393 cb_ok = 0x2000,
394 };
395
396 enum cb_command {
397 cb_nop = 0x0000,
398 cb_iaaddr = 0x0001,
399 cb_config = 0x0002,
400 cb_multi = 0x0003,
401 cb_tx = 0x0004,
402 cb_ucode = 0x0005,
403 cb_dump = 0x0006,
404 cb_tx_sf = 0x0008,
405 cb_cid = 0x1f00,
406 cb_i = 0x2000,
407 cb_s = 0x4000,
408 cb_el = 0x8000,
409 };
410
411 struct rfd {
412 __le16 status;
413 __le16 command;
414 __le32 link;
415 __le32 rbd;
416 __le16 actual_size;
417 __le16 size;
418 };
419
420 struct rx {
421 struct rx *next, *prev;
422 struct sk_buff *skb;
423 dma_addr_t dma_addr;
424 };
425
426 #if defined(__BIG_ENDIAN_BITFIELD)
427 #define X(a,b) b,a
428 #else
429 #define X(a,b) a,b
430 #endif
431 struct config {
432 /*0*/ u8 X(byte_count:6, pad0:2);
433 /*1*/ u8 X(X(rx_fifo_limit:4, tx_fifo_limit:3), pad1:1);
434 /*2*/ u8 adaptive_ifs;
435 /*3*/ u8 X(X(X(X(mwi_enable:1, type_enable:1), read_align_enable:1),
436 term_write_cache_line:1), pad3:4);
437 /*4*/ u8 X(rx_dma_max_count:7, pad4:1);
438 /*5*/ u8 X(tx_dma_max_count:7, dma_max_count_enable:1);
439 /*6*/ u8 X(X(X(X(X(X(X(late_scb_update:1, direct_rx_dma:1),
440 tno_intr:1), cna_intr:1), standard_tcb:1), standard_stat_counter:1),
441 rx_discard_overruns:1), rx_save_bad_frames:1);
442 /*7*/ u8 X(X(X(X(X(rx_discard_short_frames:1, tx_underrun_retry:2),
443 pad7:2), rx_extended_rfd:1), tx_two_frames_in_fifo:1),
444 tx_dynamic_tbd:1);
445 /*8*/ u8 X(X(mii_mode:1, pad8:6), csma_disabled:1);
446 /*9*/ u8 X(X(X(X(X(rx_tcpudp_checksum:1, pad9:3), vlan_arp_tco:1),
447 link_status_wake:1), arp_wake:1), mcmatch_wake:1);
448 /*10*/ u8 X(X(X(pad10:3, no_source_addr_insertion:1), preamble_length:2),
449 loopback:2);
450 /*11*/ u8 X(linear_priority:3, pad11:5);
451 /*12*/ u8 X(X(linear_priority_mode:1, pad12:3), ifs:4);
452 /*13*/ u8 ip_addr_lo;
453 /*14*/ u8 ip_addr_hi;
454 /*15*/ u8 X(X(X(X(X(X(X(promiscuous_mode:1, broadcast_disabled:1),
455 wait_after_win:1), pad15_1:1), ignore_ul_bit:1), crc_16_bit:1),
456 pad15_2:1), crs_or_cdt:1);
457 /*16*/ u8 fc_delay_lo;
458 /*17*/ u8 fc_delay_hi;
459 /*18*/ u8 X(X(X(X(X(rx_stripping:1, tx_padding:1), rx_crc_transfer:1),
460 rx_long_ok:1), fc_priority_threshold:3), pad18:1);
461 /*19*/ u8 X(X(X(X(X(X(X(addr_wake:1, magic_packet_disable:1),
462 fc_disable:1), fc_restop:1), fc_restart:1), fc_reject:1),
463 full_duplex_force:1), full_duplex_pin:1);
464 /*20*/ u8 X(X(X(pad20_1:5, fc_priority_location:1), multi_ia:1), pad20_2:1);
465 /*21*/ u8 X(X(pad21_1:3, multicast_all:1), pad21_2:4);
466 /*22*/ u8 X(X(rx_d102_mode:1, rx_vlan_drop:1), pad22:6);
467 u8 pad_d102[9];
468 };
469
470 #define E100_MAX_MULTICAST_ADDRS 64
471 struct multi {
472 __le16 count;
473 u8 addr[E100_MAX_MULTICAST_ADDRS * ETH_ALEN + 2/*pad*/];
474 };
475
476 /* Important: keep total struct u32-aligned */
477 #define UCODE_SIZE 134
478 struct cb {
479 __le16 status;
480 __le16 command;
481 __le32 link;
482 union {
483 u8 iaaddr[ETH_ALEN];
484 __le32 ucode[UCODE_SIZE];
485 struct config config;
486 struct multi multi;
487 struct {
488 u32 tbd_array;
489 u16 tcb_byte_count;
490 u8 threshold;
491 u8 tbd_count;
492 struct {
493 __le32 buf_addr;
494 __le16 size;
495 u16 eol;
496 } tbd;
497 } tcb;
498 __le32 dump_buffer_addr;
499 } u;
500 struct cb *next, *prev;
501 dma_addr_t dma_addr;
502 struct sk_buff *skb;
503 };
504
505 enum loopback {
506 lb_none = 0, lb_mac = 1, lb_phy = 3,
507 };
508
509 struct stats {
510 __le32 tx_good_frames, tx_max_collisions, tx_late_collisions,
511 tx_underruns, tx_lost_crs, tx_deferred, tx_single_collisions,
512 tx_multiple_collisions, tx_total_collisions;
513 __le32 rx_good_frames, rx_crc_errors, rx_alignment_errors,
514 rx_resource_errors, rx_overrun_errors, rx_cdt_errors,
515 rx_short_frame_errors;
516 __le32 fc_xmt_pause, fc_rcv_pause, fc_rcv_unsupported;
517 __le16 xmt_tco_frames, rcv_tco_frames;
518 __le32 complete;
519 };
520
521 struct mem {
522 struct {
523 u32 signature;
524 u32 result;
525 } selftest;
526 struct stats stats;
527 u8 dump_buf[596];
528 };
529
530 struct param_range {
531 u32 min;
532 u32 max;
533 u32 count;
534 };
535
536 struct params {
537 struct param_range rfds;
538 struct param_range cbs;
539 };
540
541 struct nic {
542 /* Begin: frequently used values: keep adjacent for cache effect */
543 u32 msg_enable ____cacheline_aligned;
544 struct net_device *netdev;
545 struct pci_dev *pdev;
546
547 struct rx *rxs ____cacheline_aligned;
548 struct rx *rx_to_use;
549 struct rx *rx_to_clean;
550 struct rfd blank_rfd;
551 enum ru_state ru_running;
552
553 spinlock_t cb_lock ____cacheline_aligned;
554 spinlock_t cmd_lock;
555 struct csr __iomem *csr;
556 enum scb_cmd_lo cuc_cmd;
557 unsigned int cbs_avail;
558 struct napi_struct napi;
559 struct cb *cbs;
560 struct cb *cb_to_use;
561 struct cb *cb_to_send;
562 struct cb *cb_to_clean;
563 __le16 tx_command;
564 /* End: frequently used values: keep adjacent for cache effect */
565
566 enum {
567 ich = (1 << 0),
568 promiscuous = (1 << 1),
569 multicast_all = (1 << 2),
570 wol_magic = (1 << 3),
571 ich_10h_workaround = (1 << 4),
572 } flags ____cacheline_aligned;
573
574 enum mac mac;
575 enum phy phy;
576 struct params params;
577 struct timer_list watchdog;
578 struct timer_list blink_timer;
579 struct mii_if_info mii;
580 struct work_struct tx_timeout_task;
581 enum loopback loopback;
582
583 struct mem *mem;
584 dma_addr_t dma_addr;
585
586 dma_addr_t cbs_dma_addr;
587 u8 adaptive_ifs;
588 u8 tx_threshold;
589 u32 tx_frames;
590 u32 tx_collisions;
591 u32 tx_deferred;
592 u32 tx_single_collisions;
593 u32 tx_multiple_collisions;
594 u32 tx_fc_pause;
595 u32 tx_tco_frames;
596
597 u32 rx_fc_pause;
598 u32 rx_fc_unsupported;
599 u32 rx_tco_frames;
600 u32 rx_over_length_errors;
601
602 u16 leds;
603 u16 eeprom_wc;
604 __le16 eeprom[256];
605 spinlock_t mdio_lock;
606 };
607
608 static inline void e100_write_flush(struct nic *nic)
609 {
610 /* Flush previous PCI writes through intermediate bridges
611 * by doing a benign read */
612 (void)ioread8(&nic->csr->scb.status);
613 }
614
615 static void e100_enable_irq(struct nic *nic)
616 {
617 unsigned long flags;
618
619 spin_lock_irqsave(&nic->cmd_lock, flags);
620 iowrite8(irq_mask_none, &nic->csr->scb.cmd_hi);
621 e100_write_flush(nic);
622 spin_unlock_irqrestore(&nic->cmd_lock, flags);
623 }
624
625 static void e100_disable_irq(struct nic *nic)
626 {
627 unsigned long flags;
628
629 spin_lock_irqsave(&nic->cmd_lock, flags);
630 iowrite8(irq_mask_all, &nic->csr->scb.cmd_hi);
631 e100_write_flush(nic);
632 spin_unlock_irqrestore(&nic->cmd_lock, flags);
633 }
634
635 static void e100_hw_reset(struct nic *nic)
636 {
637 /* Put CU and RU into idle with a selective reset to get
638 * device off of PCI bus */
639 iowrite32(selective_reset, &nic->csr->port);
640 e100_write_flush(nic); udelay(20);
641
642 /* Now fully reset device */
643 iowrite32(software_reset, &nic->csr->port);
644 e100_write_flush(nic); udelay(20);
645
646 /* Mask off our interrupt line - it's unmasked after reset */
647 e100_disable_irq(nic);
648 }
649
650 static int e100_self_test(struct nic *nic)
651 {
652 u32 dma_addr = nic->dma_addr + offsetof(struct mem, selftest);
653
654 /* Passing the self-test is a pretty good indication
655 * that the device can DMA to/from host memory */
656
657 nic->mem->selftest.signature = 0;
658 nic->mem->selftest.result = 0xFFFFFFFF;
659
660 iowrite32(selftest | dma_addr, &nic->csr->port);
661 e100_write_flush(nic);
662 /* Wait 10 msec for self-test to complete */
663 msleep(10);
664
665 /* Interrupts are enabled after self-test */
666 e100_disable_irq(nic);
667
668 /* Check results of self-test */
669 if (nic->mem->selftest.result != 0) {
670 DPRINTK(HW, ERR, "Self-test failed: result=0x%08X\n",
671 nic->mem->selftest.result);
672 return -ETIMEDOUT;
673 }
674 if (nic->mem->selftest.signature == 0) {
675 DPRINTK(HW, ERR, "Self-test failed: timed out\n");
676 return -ETIMEDOUT;
677 }
678
679 return 0;
680 }
681
682 static void e100_eeprom_write(struct nic *nic, u16 addr_len, u16 addr, __le16 data)
683 {
684 u32 cmd_addr_data[3];
685 u8 ctrl;
686 int i, j;
687
688 /* Three cmds: write/erase enable, write data, write/erase disable */
689 cmd_addr_data[0] = op_ewen << (addr_len - 2);
690 cmd_addr_data[1] = (((op_write << addr_len) | addr) << 16) |
691 le16_to_cpu(data);
692 cmd_addr_data[2] = op_ewds << (addr_len - 2);
693
694 /* Bit-bang cmds to write word to eeprom */
695 for (j = 0; j < 3; j++) {
696
697 /* Chip select */
698 iowrite8(eecs | eesk, &nic->csr->eeprom_ctrl_lo);
699 e100_write_flush(nic); udelay(4);
700
701 for (i = 31; i >= 0; i--) {
702 ctrl = (cmd_addr_data[j] & (1 << i)) ?
703 eecs | eedi : eecs;
704 iowrite8(ctrl, &nic->csr->eeprom_ctrl_lo);
705 e100_write_flush(nic); udelay(4);
706
707 iowrite8(ctrl | eesk, &nic->csr->eeprom_ctrl_lo);
708 e100_write_flush(nic); udelay(4);
709 }
710 /* Wait 10 msec for cmd to complete */
711 msleep(10);
712
713 /* Chip deselect */
714 iowrite8(0, &nic->csr->eeprom_ctrl_lo);
715 e100_write_flush(nic); udelay(4);
716 }
717 };
718
719 /* General technique stolen from the eepro100 driver - very clever */
720 static __le16 e100_eeprom_read(struct nic *nic, u16 *addr_len, u16 addr)
721 {
722 u32 cmd_addr_data;
723 u16 data = 0;
724 u8 ctrl;
725 int i;
726
727 cmd_addr_data = ((op_read << *addr_len) | addr) << 16;
728
729 /* Chip select */
730 iowrite8(eecs | eesk, &nic->csr->eeprom_ctrl_lo);
731 e100_write_flush(nic); udelay(4);
732
733 /* Bit-bang to read word from eeprom */
734 for (i = 31; i >= 0; i--) {
735 ctrl = (cmd_addr_data & (1 << i)) ? eecs | eedi : eecs;
736 iowrite8(ctrl, &nic->csr->eeprom_ctrl_lo);
737 e100_write_flush(nic); udelay(4);
738
739 iowrite8(ctrl | eesk, &nic->csr->eeprom_ctrl_lo);
740 e100_write_flush(nic); udelay(4);
741
742 /* Eeprom drives a dummy zero to EEDO after receiving
743 * complete address. Use this to adjust addr_len. */
744 ctrl = ioread8(&nic->csr->eeprom_ctrl_lo);
745 if (!(ctrl & eedo) && i > 16) {
746 *addr_len -= (i - 16);
747 i = 17;
748 }
749
750 data = (data << 1) | (ctrl & eedo ? 1 : 0);
751 }
752
753 /* Chip deselect */
754 iowrite8(0, &nic->csr->eeprom_ctrl_lo);
755 e100_write_flush(nic); udelay(4);
756
757 return cpu_to_le16(data);
758 };
759
760 /* Load entire EEPROM image into driver cache and validate checksum */
761 static int e100_eeprom_load(struct nic *nic)
762 {
763 u16 addr, addr_len = 8, checksum = 0;
764
765 /* Try reading with an 8-bit addr len to discover actual addr len */
766 e100_eeprom_read(nic, &addr_len, 0);
767 nic->eeprom_wc = 1 << addr_len;
768
769 for (addr = 0; addr < nic->eeprom_wc; addr++) {
770 nic->eeprom[addr] = e100_eeprom_read(nic, &addr_len, addr);
771 if (addr < nic->eeprom_wc - 1)
772 checksum += le16_to_cpu(nic->eeprom[addr]);
773 }
774
775 /* The checksum, stored in the last word, is calculated such that
776 * the sum of words should be 0xBABA */
777 if (cpu_to_le16(0xBABA - checksum) != nic->eeprom[nic->eeprom_wc - 1]) {
778 DPRINTK(PROBE, ERR, "EEPROM corrupted\n");
779 if (!eeprom_bad_csum_allow)
780 return -EAGAIN;
781 }
782
783 return 0;
784 }
785
786 /* Save (portion of) driver EEPROM cache to device and update checksum */
787 static int e100_eeprom_save(struct nic *nic, u16 start, u16 count)
788 {
789 u16 addr, addr_len = 8, checksum = 0;
790
791 /* Try reading with an 8-bit addr len to discover actual addr len */
792 e100_eeprom_read(nic, &addr_len, 0);
793 nic->eeprom_wc = 1 << addr_len;
794
795 if (start + count >= nic->eeprom_wc)
796 return -EINVAL;
797
798 for (addr = start; addr < start + count; addr++)
799 e100_eeprom_write(nic, addr_len, addr, nic->eeprom[addr]);
800
801 /* The checksum, stored in the last word, is calculated such that
802 * the sum of words should be 0xBABA */
803 for (addr = 0; addr < nic->eeprom_wc - 1; addr++)
804 checksum += le16_to_cpu(nic->eeprom[addr]);
805 nic->eeprom[nic->eeprom_wc - 1] = cpu_to_le16(0xBABA - checksum);
806 e100_eeprom_write(nic, addr_len, nic->eeprom_wc - 1,
807 nic->eeprom[nic->eeprom_wc - 1]);
808
809 return 0;
810 }
811
812 #define E100_WAIT_SCB_TIMEOUT 20000 /* we might have to wait 100ms!!! */
813 #define E100_WAIT_SCB_FAST 20 /* delay like the old code */
814 static int e100_exec_cmd(struct nic *nic, u8 cmd, dma_addr_t dma_addr)
815 {
816 unsigned long flags;
817 unsigned int i;
818 int err = 0;
819
820 spin_lock_irqsave(&nic->cmd_lock, flags);
821
822 /* Previous command is accepted when SCB clears */
823 for (i = 0; i < E100_WAIT_SCB_TIMEOUT; i++) {
824 if (likely(!ioread8(&nic->csr->scb.cmd_lo)))
825 break;
826 cpu_relax();
827 if (unlikely(i > E100_WAIT_SCB_FAST))
828 udelay(5);
829 }
830 if (unlikely(i == E100_WAIT_SCB_TIMEOUT)) {
831 err = -EAGAIN;
832 goto err_unlock;
833 }
834
835 if (unlikely(cmd != cuc_resume))
836 iowrite32(dma_addr, &nic->csr->scb.gen_ptr);
837 iowrite8(cmd, &nic->csr->scb.cmd_lo);
838
839 err_unlock:
840 spin_unlock_irqrestore(&nic->cmd_lock, flags);
841
842 return err;
843 }
844
845 static int e100_exec_cb(struct nic *nic, struct sk_buff *skb,
846 void (*cb_prepare)(struct nic *, struct cb *, struct sk_buff *))
847 {
848 struct cb *cb;
849 unsigned long flags;
850 int err = 0;
851
852 spin_lock_irqsave(&nic->cb_lock, flags);
853
854 if (unlikely(!nic->cbs_avail)) {
855 err = -ENOMEM;
856 goto err_unlock;
857 }
858
859 cb = nic->cb_to_use;
860 nic->cb_to_use = cb->next;
861 nic->cbs_avail--;
862 cb->skb = skb;
863
864 if (unlikely(!nic->cbs_avail))
865 err = -ENOSPC;
866
867 cb_prepare(nic, cb, skb);
868
869 /* Order is important otherwise we'll be in a race with h/w:
870 * set S-bit in current first, then clear S-bit in previous. */
871 cb->command |= cpu_to_le16(cb_s);
872 wmb();
873 cb->prev->command &= cpu_to_le16(~cb_s);
874
875 while (nic->cb_to_send != nic->cb_to_use) {
876 if (unlikely(e100_exec_cmd(nic, nic->cuc_cmd,
877 nic->cb_to_send->dma_addr))) {
878 /* Ok, here's where things get sticky. It's
879 * possible that we can't schedule the command
880 * because the controller is too busy, so
881 * let's just queue the command and try again
882 * when another command is scheduled. */
883 if (err == -ENOSPC) {
884 //request a reset
885 schedule_work(&nic->tx_timeout_task);
886 }
887 break;
888 } else {
889 nic->cuc_cmd = cuc_resume;
890 nic->cb_to_send = nic->cb_to_send->next;
891 }
892 }
893
894 err_unlock:
895 spin_unlock_irqrestore(&nic->cb_lock, flags);
896
897 return err;
898 }
899
900 static u16 mdio_ctrl(struct nic *nic, u32 addr, u32 dir, u32 reg, u16 data)
901 {
902 u32 data_out = 0;
903 unsigned int i;
904 unsigned long flags;
905
906
907 /*
908 * Stratus87247: we shouldn't be writing the MDI control
909 * register until the Ready bit shows True. Also, since
910 * manipulation of the MDI control registers is a multi-step
911 * procedure it should be done under lock.
912 */
913 spin_lock_irqsave(&nic->mdio_lock, flags);
914 for (i = 100; i; --i) {
915 if (ioread32(&nic->csr->mdi_ctrl) & mdi_ready)
916 break;
917 udelay(20);
918 }
919 if (unlikely(!i)) {
920 printk("e100.mdio_ctrl(%s) won't go Ready\n",
921 nic->netdev->name );
922 spin_unlock_irqrestore(&nic->mdio_lock, flags);
923 return 0; /* No way to indicate timeout error */
924 }
925 iowrite32((reg << 16) | (addr << 21) | dir | data, &nic->csr->mdi_ctrl);
926
927 for (i = 0; i < 100; i++) {
928 udelay(20);
929 if ((data_out = ioread32(&nic->csr->mdi_ctrl)) & mdi_ready)
930 break;
931 }
932 spin_unlock_irqrestore(&nic->mdio_lock, flags);
933 DPRINTK(HW, DEBUG,
934 "%s:addr=%d, reg=%d, data_in=0x%04X, data_out=0x%04X\n",
935 dir == mdi_read ? "READ" : "WRITE", addr, reg, data, data_out);
936 return (u16)data_out;
937 }
938
939 static int mdio_read(struct net_device *netdev, int addr, int reg)
940 {
941 return mdio_ctrl(netdev_priv(netdev), addr, mdi_read, reg, 0);
942 }
943
944 static void mdio_write(struct net_device *netdev, int addr, int reg, int data)
945 {
946 mdio_ctrl(netdev_priv(netdev), addr, mdi_write, reg, data);
947 }
948
949 static void e100_get_defaults(struct nic *nic)
950 {
951 struct param_range rfds = { .min = 16, .max = 256, .count = 256 };
952 struct param_range cbs = { .min = 64, .max = 256, .count = 128 };
953
954 /* MAC type is encoded as rev ID; exception: ICH is treated as 82559 */
955 nic->mac = (nic->flags & ich) ? mac_82559_D101M : nic->pdev->revision;
956 if (nic->mac == mac_unknown)
957 nic->mac = mac_82557_D100_A;
958
959 nic->params.rfds = rfds;
960 nic->params.cbs = cbs;
961
962 /* Quadwords to DMA into FIFO before starting frame transmit */
963 nic->tx_threshold = 0xE0;
964
965 /* no interrupt for every tx completion, delay = 256us if not 557 */
966 nic->tx_command = cpu_to_le16(cb_tx | cb_tx_sf |
967 ((nic->mac >= mac_82558_D101_A4) ? cb_cid : cb_i));
968
969 /* Template for a freshly allocated RFD */
970 nic->blank_rfd.command = 0;
971 nic->blank_rfd.rbd = cpu_to_le32(0xFFFFFFFF);
972 nic->blank_rfd.size = cpu_to_le16(VLAN_ETH_FRAME_LEN);
973
974 /* MII setup */
975 nic->mii.phy_id_mask = 0x1F;
976 nic->mii.reg_num_mask = 0x1F;
977 nic->mii.dev = nic->netdev;
978 nic->mii.mdio_read = mdio_read;
979 nic->mii.mdio_write = mdio_write;
980 }
981
982 static void e100_configure(struct nic *nic, struct cb *cb, struct sk_buff *skb)
983 {
984 struct config *config = &cb->u.config;
985 u8 *c = (u8 *)config;
986
987 cb->command = cpu_to_le16(cb_config);
988
989 memset(config, 0, sizeof(struct config));
990
991 config->byte_count = 0x16; /* bytes in this struct */
992 config->rx_fifo_limit = 0x8; /* bytes in FIFO before DMA */
993 config->direct_rx_dma = 0x1; /* reserved */
994 config->standard_tcb = 0x1; /* 1=standard, 0=extended */
995 config->standard_stat_counter = 0x1; /* 1=standard, 0=extended */
996 config->rx_discard_short_frames = 0x1; /* 1=discard, 0=pass */
997 config->tx_underrun_retry = 0x3; /* # of underrun retries */
998 config->mii_mode = 0x1; /* 1=MII mode, 0=503 mode */
999 config->pad10 = 0x6;
1000 config->no_source_addr_insertion = 0x1; /* 1=no, 0=yes */
1001 config->preamble_length = 0x2; /* 0=1, 1=3, 2=7, 3=15 bytes */
1002 config->ifs = 0x6; /* x16 = inter frame spacing */
1003 config->ip_addr_hi = 0xF2; /* ARP IP filter - not used */
1004 config->pad15_1 = 0x1;
1005 config->pad15_2 = 0x1;
1006 config->crs_or_cdt = 0x0; /* 0=CRS only, 1=CRS or CDT */
1007 config->fc_delay_hi = 0x40; /* time delay for fc frame */
1008 config->tx_padding = 0x1; /* 1=pad short frames */
1009 config->fc_priority_threshold = 0x7; /* 7=priority fc disabled */
1010 config->pad18 = 0x1;
1011 config->full_duplex_pin = 0x1; /* 1=examine FDX# pin */
1012 config->pad20_1 = 0x1F;
1013 config->fc_priority_location = 0x1; /* 1=byte#31, 0=byte#19 */
1014 config->pad21_1 = 0x5;
1015
1016 config->adaptive_ifs = nic->adaptive_ifs;
1017 config->loopback = nic->loopback;
1018
1019 if (nic->mii.force_media && nic->mii.full_duplex)
1020 config->full_duplex_force = 0x1; /* 1=force, 0=auto */
1021
1022 if (nic->flags & promiscuous || nic->loopback) {
1023 config->rx_save_bad_frames = 0x1; /* 1=save, 0=discard */
1024 config->rx_discard_short_frames = 0x0; /* 1=discard, 0=save */
1025 config->promiscuous_mode = 0x1; /* 1=on, 0=off */
1026 }
1027
1028 if (nic->flags & multicast_all)
1029 config->multicast_all = 0x1; /* 1=accept, 0=no */
1030
1031 /* disable WoL when up */
1032 if (netif_running(nic->netdev) || !(nic->flags & wol_magic))
1033 config->magic_packet_disable = 0x1; /* 1=off, 0=on */
1034
1035 if (nic->mac >= mac_82558_D101_A4) {
1036 config->fc_disable = 0x1; /* 1=Tx fc off, 0=Tx fc on */
1037 config->mwi_enable = 0x1; /* 1=enable, 0=disable */
1038 config->standard_tcb = 0x0; /* 1=standard, 0=extended */
1039 config->rx_long_ok = 0x1; /* 1=VLANs ok, 0=standard */
1040 if (nic->mac >= mac_82559_D101M) {
1041 config->tno_intr = 0x1; /* TCO stats enable */
1042 /* Enable TCO in extended config */
1043 if (nic->mac >= mac_82551_10) {
1044 config->byte_count = 0x20; /* extended bytes */
1045 config->rx_d102_mode = 0x1; /* GMRC for TCO */
1046 }
1047 } else {
1048 config->standard_stat_counter = 0x0;
1049 }
1050 }
1051
1052 DPRINTK(HW, DEBUG, "[00-07]=%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
1053 c[0], c[1], c[2], c[3], c[4], c[5], c[6], c[7]);
1054 DPRINTK(HW, DEBUG, "[08-15]=%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
1055 c[8], c[9], c[10], c[11], c[12], c[13], c[14], c[15]);
1056 DPRINTK(HW, DEBUG, "[16-23]=%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
1057 c[16], c[17], c[18], c[19], c[20], c[21], c[22], c[23]);
1058 }
1059
1060 /*************************************************************************
1061 * CPUSaver parameters
1062 *
1063 * All CPUSaver parameters are 16-bit literals that are part of a
1064 * "move immediate value" instruction. By changing the value of
1065 * the literal in the instruction before the code is loaded, the
1066 * driver can change the algorithm.
1067 *
1068 * INTDELAY - This loads the dead-man timer with its initial value.
1069 * When this timer expires the interrupt is asserted, and the
1070 * timer is reset each time a new packet is received. (see
1071 * BUNDLEMAX below to set the limit on number of chained packets)
1072 * The current default is 0x600 or 1536. Experiments show that
1073 * the value should probably stay within the 0x200 - 0x1000.
1074 *
1075 * BUNDLEMAX -
1076 * This sets the maximum number of frames that will be bundled. In
1077 * some situations, such as the TCP windowing algorithm, it may be
1078 * better to limit the growth of the bundle size than let it go as
1079 * high as it can, because that could cause too much added latency.
1080 * The default is six, because this is the number of packets in the
1081 * default TCP window size. A value of 1 would make CPUSaver indicate
1082 * an interrupt for every frame received. If you do not want to put
1083 * a limit on the bundle size, set this value to xFFFF.
1084 *
1085 * BUNDLESMALL -
1086 * This contains a bit-mask describing the minimum size frame that
1087 * will be bundled. The default masks the lower 7 bits, which means
1088 * that any frame less than 128 bytes in length will not be bundled,
1089 * but will instead immediately generate an interrupt. This does
1090 * not affect the current bundle in any way. Any frame that is 128
1091 * bytes or large will be bundled normally. This feature is meant
1092 * to provide immediate indication of ACK frames in a TCP environment.
1093 * Customers were seeing poor performance when a machine with CPUSaver
1094 * enabled was sending but not receiving. The delay introduced when
1095 * the ACKs were received was enough to reduce total throughput, because
1096 * the sender would sit idle until the ACK was finally seen.
1097 *
1098 * The current default is 0xFF80, which masks out the lower 7 bits.
1099 * This means that any frame which is x7F (127) bytes or smaller
1100 * will cause an immediate interrupt. Because this value must be a
1101 * bit mask, there are only a few valid values that can be used. To
1102 * turn this feature off, the driver can write the value xFFFF to the
1103 * lower word of this instruction (in the same way that the other
1104 * parameters are used). Likewise, a value of 0xF800 (2047) would
1105 * cause an interrupt to be generated for every frame, because all
1106 * standard Ethernet frames are <= 2047 bytes in length.
1107 *************************************************************************/
1108
1109 /* if you wish to disable the ucode functionality, while maintaining the
1110 * workarounds it provides, set the following defines to:
1111 * BUNDLESMALL 0
1112 * BUNDLEMAX 1
1113 * INTDELAY 1
1114 */
1115 #define BUNDLESMALL 1
1116 #define BUNDLEMAX (u16)6
1117 #define INTDELAY (u16)1536 /* 0x600 */
1118
1119 /* Initialize firmware */
1120 static const struct firmware *e100_request_firmware(struct nic *nic)
1121 {
1122 const char *fw_name;
1123 const struct firmware *fw;
1124 u8 timer, bundle, min_size;
1125 int err;
1126
1127 /* do not load u-code for ICH devices */
1128 if (nic->flags & ich)
1129 return NULL;
1130
1131 /* Search for ucode match against h/w revision */
1132 if (nic->mac == mac_82559_D101M)
1133 fw_name = FIRMWARE_D101M;
1134 else if (nic->mac == mac_82559_D101S)
1135 fw_name = FIRMWARE_D101S;
1136 else if (nic->mac == mac_82551_F || nic->mac == mac_82551_10)
1137 fw_name = FIRMWARE_D102E;
1138 else /* No ucode on other devices */
1139 return NULL;
1140
1141 err = request_firmware(&fw, fw_name, &nic->pdev->dev);
1142 if (err) {
1143 DPRINTK(PROBE, ERR, "Failed to load firmware \"%s\": %d\n",
1144 fw_name, err);
1145 return ERR_PTR(err);
1146 }
1147 /* Firmware should be precisely UCODE_SIZE (words) plus three bytes
1148 indicating the offsets for BUNDLESMALL, BUNDLEMAX, INTDELAY */
1149 if (fw->size != UCODE_SIZE * 4 + 3) {
1150 DPRINTK(PROBE, ERR, "Firmware \"%s\" has wrong size %zu\n",
1151 fw_name, fw->size);
1152 release_firmware(fw);
1153 return ERR_PTR(-EINVAL);
1154 }
1155
1156 /* Read timer, bundle and min_size from end of firmware blob */
1157 timer = fw->data[UCODE_SIZE * 4];
1158 bundle = fw->data[UCODE_SIZE * 4 + 1];
1159 min_size = fw->data[UCODE_SIZE * 4 + 2];
1160
1161 if (timer >= UCODE_SIZE || bundle >= UCODE_SIZE ||
1162 min_size >= UCODE_SIZE) {
1163 DPRINTK(PROBE, ERR,
1164 "\"%s\" has bogus offset values (0x%x,0x%x,0x%x)\n",
1165 fw_name, timer, bundle, min_size);
1166 release_firmware(fw);
1167 return ERR_PTR(-EINVAL);
1168 }
1169 /* OK, firmware is validated and ready to use... */
1170 return fw;
1171 }
1172
1173 static void e100_setup_ucode(struct nic *nic, struct cb *cb,
1174 struct sk_buff *skb)
1175 {
1176 const struct firmware *fw = (void *)skb;
1177 u8 timer, bundle, min_size;
1178
1179 /* It's not a real skb; we just abused the fact that e100_exec_cb
1180 will pass it through to here... */
1181 cb->skb = NULL;
1182
1183 /* firmware is stored as little endian already */
1184 memcpy(cb->u.ucode, fw->data, UCODE_SIZE * 4);
1185
1186 /* Read timer, bundle and min_size from end of firmware blob */
1187 timer = fw->data[UCODE_SIZE * 4];
1188 bundle = fw->data[UCODE_SIZE * 4 + 1];
1189 min_size = fw->data[UCODE_SIZE * 4 + 2];
1190
1191 /* Insert user-tunable settings in cb->u.ucode */
1192 cb->u.ucode[timer] &= cpu_to_le32(0xFFFF0000);
1193 cb->u.ucode[timer] |= cpu_to_le32(INTDELAY);
1194 cb->u.ucode[bundle] &= cpu_to_le32(0xFFFF0000);
1195 cb->u.ucode[bundle] |= cpu_to_le32(BUNDLEMAX);
1196 cb->u.ucode[min_size] &= cpu_to_le32(0xFFFF0000);
1197 cb->u.ucode[min_size] |= cpu_to_le32((BUNDLESMALL) ? 0xFFFF : 0xFF80);
1198
1199 cb->command = cpu_to_le16(cb_ucode | cb_el);
1200 }
1201
1202 static inline int e100_load_ucode_wait(struct nic *nic)
1203 {
1204 const struct firmware *fw;
1205 int err = 0, counter = 50;
1206 struct cb *cb = nic->cb_to_clean;
1207
1208 fw = e100_request_firmware(nic);
1209 /* If it's NULL, then no ucode is required */
1210 if (!fw || IS_ERR(fw))
1211 return PTR_ERR(fw);
1212
1213 if ((err = e100_exec_cb(nic, (void *)fw, e100_setup_ucode)))
1214 DPRINTK(PROBE,ERR, "ucode cmd failed with error %d\n", err);
1215
1216 /* must restart cuc */
1217 nic->cuc_cmd = cuc_start;
1218
1219 /* wait for completion */
1220 e100_write_flush(nic);
1221 udelay(10);
1222
1223 /* wait for possibly (ouch) 500ms */
1224 while (!(cb->status & cpu_to_le16(cb_complete))) {
1225 msleep(10);
1226 if (!--counter) break;
1227 }
1228
1229 /* ack any interrupts, something could have been set */
1230 iowrite8(~0, &nic->csr->scb.stat_ack);
1231
1232 /* if the command failed, or is not OK, notify and return */
1233 if (!counter || !(cb->status & cpu_to_le16(cb_ok))) {
1234 DPRINTK(PROBE,ERR, "ucode load failed\n");
1235 err = -EPERM;
1236 }
1237
1238 return err;
1239 }
1240
1241 static void e100_setup_iaaddr(struct nic *nic, struct cb *cb,
1242 struct sk_buff *skb)
1243 {
1244 cb->command = cpu_to_le16(cb_iaaddr);
1245 memcpy(cb->u.iaaddr, nic->netdev->dev_addr, ETH_ALEN);
1246 }
1247
1248 static void e100_dump(struct nic *nic, struct cb *cb, struct sk_buff *skb)
1249 {
1250 cb->command = cpu_to_le16(cb_dump);
1251 cb->u.dump_buffer_addr = cpu_to_le32(nic->dma_addr +
1252 offsetof(struct mem, dump_buf));
1253 }
1254
1255 #define NCONFIG_AUTO_SWITCH 0x0080
1256 #define MII_NSC_CONG MII_RESV1
1257 #define NSC_CONG_ENABLE 0x0100
1258 #define NSC_CONG_TXREADY 0x0400
1259 #define ADVERTISE_FC_SUPPORTED 0x0400
1260 static int e100_phy_init(struct nic *nic)
1261 {
1262 struct net_device *netdev = nic->netdev;
1263 u32 addr;
1264 u16 bmcr, stat, id_lo, id_hi, cong;
1265
1266 /* Discover phy addr by searching addrs in order {1,0,2,..., 31} */
1267 for (addr = 0; addr < 32; addr++) {
1268 nic->mii.phy_id = (addr == 0) ? 1 : (addr == 1) ? 0 : addr;
1269 bmcr = mdio_read(netdev, nic->mii.phy_id, MII_BMCR);
1270 stat = mdio_read(netdev, nic->mii.phy_id, MII_BMSR);
1271 stat = mdio_read(netdev, nic->mii.phy_id, MII_BMSR);
1272 if (!((bmcr == 0xFFFF) || ((stat == 0) && (bmcr == 0))))
1273 break;
1274 }
1275 DPRINTK(HW, DEBUG, "phy_addr = %d\n", nic->mii.phy_id);
1276 if (addr == 32)
1277 return -EAGAIN;
1278
1279 /* Selected the phy and isolate the rest */
1280 for (addr = 0; addr < 32; addr++) {
1281 if (addr != nic->mii.phy_id) {
1282 mdio_write(netdev, addr, MII_BMCR, BMCR_ISOLATE);
1283 } else {
1284 bmcr = mdio_read(netdev, addr, MII_BMCR);
1285 mdio_write(netdev, addr, MII_BMCR,
1286 bmcr & ~BMCR_ISOLATE);
1287 }
1288 }
1289
1290 /* Get phy ID */
1291 id_lo = mdio_read(netdev, nic->mii.phy_id, MII_PHYSID1);
1292 id_hi = mdio_read(netdev, nic->mii.phy_id, MII_PHYSID2);
1293 nic->phy = (u32)id_hi << 16 | (u32)id_lo;
1294 DPRINTK(HW, DEBUG, "phy ID = 0x%08X\n", nic->phy);
1295
1296 /* Handle National tx phys */
1297 #define NCS_PHY_MODEL_MASK 0xFFF0FFFF
1298 if ((nic->phy & NCS_PHY_MODEL_MASK) == phy_nsc_tx) {
1299 /* Disable congestion control */
1300 cong = mdio_read(netdev, nic->mii.phy_id, MII_NSC_CONG);
1301 cong |= NSC_CONG_TXREADY;
1302 cong &= ~NSC_CONG_ENABLE;
1303 mdio_write(netdev, nic->mii.phy_id, MII_NSC_CONG, cong);
1304 }
1305
1306 if ((nic->mac >= mac_82550_D102) || ((nic->flags & ich) &&
1307 (mdio_read(netdev, nic->mii.phy_id, MII_TPISTATUS) & 0x8000) &&
1308 !(nic->eeprom[eeprom_cnfg_mdix] & eeprom_mdix_enabled))) {
1309 /* enable/disable MDI/MDI-X auto-switching. */
1310 mdio_write(netdev, nic->mii.phy_id, MII_NCONFIG,
1311 nic->mii.force_media ? 0 : NCONFIG_AUTO_SWITCH);
1312 }
1313
1314 return 0;
1315 }
1316
1317 static int e100_hw_init(struct nic *nic)
1318 {
1319 int err;
1320
1321 e100_hw_reset(nic);
1322
1323 DPRINTK(HW, ERR, "e100_hw_init\n");
1324 if (!in_interrupt() && (err = e100_self_test(nic)))
1325 return err;
1326
1327 if ((err = e100_phy_init(nic)))
1328 return err;
1329 if ((err = e100_exec_cmd(nic, cuc_load_base, 0)))
1330 return err;
1331 if ((err = e100_exec_cmd(nic, ruc_load_base, 0)))
1332 return err;
1333 if ((err = e100_load_ucode_wait(nic)))
1334 return err;
1335 if ((err = e100_exec_cb(nic, NULL, e100_configure)))
1336 return err;
1337 if ((err = e100_exec_cb(nic, NULL, e100_setup_iaaddr)))
1338 return err;
1339 if ((err = e100_exec_cmd(nic, cuc_dump_addr,
1340 nic->dma_addr + offsetof(struct mem, stats))))
1341 return err;
1342 if ((err = e100_exec_cmd(nic, cuc_dump_reset, 0)))
1343 return err;
1344
1345 e100_disable_irq(nic);
1346
1347 return 0;
1348 }
1349
1350 static void e100_multi(struct nic *nic, struct cb *cb, struct sk_buff *skb)
1351 {
1352 struct net_device *netdev = nic->netdev;
1353 struct dev_mc_list *list = netdev->mc_list;
1354 u16 i, count = min(netdev->mc_count, E100_MAX_MULTICAST_ADDRS);
1355
1356 cb->command = cpu_to_le16(cb_multi);
1357 cb->u.multi.count = cpu_to_le16(count * ETH_ALEN);
1358 for (i = 0; list && i < count; i++, list = list->next)
1359 memcpy(&cb->u.multi.addr[i*ETH_ALEN], &list->dmi_addr,
1360 ETH_ALEN);
1361 }
1362
1363 static void e100_set_multicast_list(struct net_device *netdev)
1364 {
1365 struct nic *nic = netdev_priv(netdev);
1366
1367 DPRINTK(HW, DEBUG, "mc_count=%d, flags=0x%04X\n",
1368 netdev->mc_count, netdev->flags);
1369
1370 if (netdev->flags & IFF_PROMISC)
1371 nic->flags |= promiscuous;
1372 else
1373 nic->flags &= ~promiscuous;
1374
1375 if (netdev->flags & IFF_ALLMULTI ||
1376 netdev->mc_count > E100_MAX_MULTICAST_ADDRS)
1377 nic->flags |= multicast_all;
1378 else
1379 nic->flags &= ~multicast_all;
1380
1381 e100_exec_cb(nic, NULL, e100_configure);
1382 e100_exec_cb(nic, NULL, e100_multi);
1383 }
1384
1385 static void e100_update_stats(struct nic *nic)
1386 {
1387 struct net_device *dev = nic->netdev;
1388 struct net_device_stats *ns = &dev->stats;
1389 struct stats *s = &nic->mem->stats;
1390 __le32 *complete = (nic->mac < mac_82558_D101_A4) ? &s->fc_xmt_pause :
1391 (nic->mac < mac_82559_D101M) ? (__le32 *)&s->xmt_tco_frames :
1392 &s->complete;
1393
1394 /* Device's stats reporting may take several microseconds to
1395 * complete, so we're always waiting for results of the
1396 * previous command. */
1397
1398 if (*complete == cpu_to_le32(cuc_dump_reset_complete)) {
1399 *complete = 0;
1400 nic->tx_frames = le32_to_cpu(s->tx_good_frames);
1401 nic->tx_collisions = le32_to_cpu(s->tx_total_collisions);
1402 ns->tx_aborted_errors += le32_to_cpu(s->tx_max_collisions);
1403 ns->tx_window_errors += le32_to_cpu(s->tx_late_collisions);
1404 ns->tx_carrier_errors += le32_to_cpu(s->tx_lost_crs);
1405 ns->tx_fifo_errors += le32_to_cpu(s->tx_underruns);
1406 ns->collisions += nic->tx_collisions;
1407 ns->tx_errors += le32_to_cpu(s->tx_max_collisions) +
1408 le32_to_cpu(s->tx_lost_crs);
1409 ns->rx_length_errors += le32_to_cpu(s->rx_short_frame_errors) +
1410 nic->rx_over_length_errors;
1411 ns->rx_crc_errors += le32_to_cpu(s->rx_crc_errors);
1412 ns->rx_frame_errors += le32_to_cpu(s->rx_alignment_errors);
1413 ns->rx_over_errors += le32_to_cpu(s->rx_overrun_errors);
1414 ns->rx_fifo_errors += le32_to_cpu(s->rx_overrun_errors);
1415 ns->rx_missed_errors += le32_to_cpu(s->rx_resource_errors);
1416 ns->rx_errors += le32_to_cpu(s->rx_crc_errors) +
1417 le32_to_cpu(s->rx_alignment_errors) +
1418 le32_to_cpu(s->rx_short_frame_errors) +
1419 le32_to_cpu(s->rx_cdt_errors);
1420 nic->tx_deferred += le32_to_cpu(s->tx_deferred);
1421 nic->tx_single_collisions +=
1422 le32_to_cpu(s->tx_single_collisions);
1423 nic->tx_multiple_collisions +=
1424 le32_to_cpu(s->tx_multiple_collisions);
1425 if (nic->mac >= mac_82558_D101_A4) {
1426 nic->tx_fc_pause += le32_to_cpu(s->fc_xmt_pause);
1427 nic->rx_fc_pause += le32_to_cpu(s->fc_rcv_pause);
1428 nic->rx_fc_unsupported +=
1429 le32_to_cpu(s->fc_rcv_unsupported);
1430 if (nic->mac >= mac_82559_D101M) {
1431 nic->tx_tco_frames +=
1432 le16_to_cpu(s->xmt_tco_frames);
1433 nic->rx_tco_frames +=
1434 le16_to_cpu(s->rcv_tco_frames);
1435 }
1436 }
1437 }
1438
1439
1440 if (e100_exec_cmd(nic, cuc_dump_reset, 0))
1441 DPRINTK(TX_ERR, DEBUG, "exec cuc_dump_reset failed\n");
1442 }
1443
1444 static void e100_adjust_adaptive_ifs(struct nic *nic, int speed, int duplex)
1445 {
1446 /* Adjust inter-frame-spacing (IFS) between two transmits if
1447 * we're getting collisions on a half-duplex connection. */
1448
1449 if (duplex == DUPLEX_HALF) {
1450 u32 prev = nic->adaptive_ifs;
1451 u32 min_frames = (speed == SPEED_100) ? 1000 : 100;
1452
1453 if ((nic->tx_frames / 32 < nic->tx_collisions) &&
1454 (nic->tx_frames > min_frames)) {
1455 if (nic->adaptive_ifs < 60)
1456 nic->adaptive_ifs += 5;
1457 } else if (nic->tx_frames < min_frames) {
1458 if (nic->adaptive_ifs >= 5)
1459 nic->adaptive_ifs -= 5;
1460 }
1461 if (nic->adaptive_ifs != prev)
1462 e100_exec_cb(nic, NULL, e100_configure);
1463 }
1464 }
1465
1466 static void e100_watchdog(unsigned long data)
1467 {
1468 struct nic *nic = (struct nic *)data;
1469 struct ethtool_cmd cmd;
1470
1471 DPRINTK(TIMER, DEBUG, "right now = %ld\n", jiffies);
1472
1473 /* mii library handles link maintenance tasks */
1474
1475 mii_ethtool_gset(&nic->mii, &cmd);
1476
1477 if (mii_link_ok(&nic->mii) && !netif_carrier_ok(nic->netdev)) {
1478 printk(KERN_INFO "e100: %s NIC Link is Up %s Mbps %s Duplex\n",
1479 nic->netdev->name,
1480 cmd.speed == SPEED_100 ? "100" : "10",
1481 cmd.duplex == DUPLEX_FULL ? "Full" : "Half");
1482 } else if (!mii_link_ok(&nic->mii) && netif_carrier_ok(nic->netdev)) {
1483 printk(KERN_INFO "e100: %s NIC Link is Down\n",
1484 nic->netdev->name);
1485 }
1486
1487 mii_check_link(&nic->mii);
1488
1489 /* Software generated interrupt to recover from (rare) Rx
1490 * allocation failure.
1491 * Unfortunately have to use a spinlock to not re-enable interrupts
1492 * accidentally, due to hardware that shares a register between the
1493 * interrupt mask bit and the SW Interrupt generation bit */
1494 spin_lock_irq(&nic->cmd_lock);
1495 iowrite8(ioread8(&nic->csr->scb.cmd_hi) | irq_sw_gen,&nic->csr->scb.cmd_hi);
1496 e100_write_flush(nic);
1497 spin_unlock_irq(&nic->cmd_lock);
1498
1499 e100_update_stats(nic);
1500 e100_adjust_adaptive_ifs(nic, cmd.speed, cmd.duplex);
1501
1502 if (nic->mac <= mac_82557_D100_C)
1503 /* Issue a multicast command to workaround a 557 lock up */
1504 e100_set_multicast_list(nic->netdev);
1505
1506 if (nic->flags & ich && cmd.speed==SPEED_10 && cmd.duplex==DUPLEX_HALF)
1507 /* Need SW workaround for ICH[x] 10Mbps/half duplex Tx hang. */
1508 nic->flags |= ich_10h_workaround;
1509 else
1510 nic->flags &= ~ich_10h_workaround;
1511
1512 mod_timer(&nic->watchdog,
1513 round_jiffies(jiffies + E100_WATCHDOG_PERIOD));
1514 }
1515
1516 static void e100_xmit_prepare(struct nic *nic, struct cb *cb,
1517 struct sk_buff *skb)
1518 {
1519 cb->command = nic->tx_command;
1520 /* interrupt every 16 packets regardless of delay */
1521 if ((nic->cbs_avail & ~15) == nic->cbs_avail)
1522 cb->command |= cpu_to_le16(cb_i);
1523 cb->u.tcb.tbd_array = cb->dma_addr + offsetof(struct cb, u.tcb.tbd);
1524 cb->u.tcb.tcb_byte_count = 0;
1525 cb->u.tcb.threshold = nic->tx_threshold;
1526 cb->u.tcb.tbd_count = 1;
1527 cb->u.tcb.tbd.buf_addr = cpu_to_le32(pci_map_single(nic->pdev,
1528 skb->data, skb->len, PCI_DMA_TODEVICE));
1529 /* check for mapping failure? */
1530 cb->u.tcb.tbd.size = cpu_to_le16(skb->len);
1531 }
1532
1533 static int e100_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1534 {
1535 struct nic *nic = netdev_priv(netdev);
1536 int err;
1537
1538 if (nic->flags & ich_10h_workaround) {
1539 /* SW workaround for ICH[x] 10Mbps/half duplex Tx hang.
1540 Issue a NOP command followed by a 1us delay before
1541 issuing the Tx command. */
1542 if (e100_exec_cmd(nic, cuc_nop, 0))
1543 DPRINTK(TX_ERR, DEBUG, "exec cuc_nop failed\n");
1544 udelay(1);
1545 }
1546
1547 err = e100_exec_cb(nic, skb, e100_xmit_prepare);
1548
1549 switch (err) {
1550 case -ENOSPC:
1551 /* We queued the skb, but now we're out of space. */
1552 DPRINTK(TX_ERR, DEBUG, "No space for CB\n");
1553 netif_stop_queue(netdev);
1554 break;
1555 case -ENOMEM:
1556 /* This is a hard error - log it. */
1557 DPRINTK(TX_ERR, DEBUG, "Out of Tx resources, returning skb\n");
1558 netif_stop_queue(netdev);
1559 return 1;
1560 }
1561
1562 netdev->trans_start = jiffies;
1563 return 0;
1564 }
1565
1566 static int e100_tx_clean(struct nic *nic)
1567 {
1568 struct net_device *dev = nic->netdev;
1569 struct cb *cb;
1570 int tx_cleaned = 0;
1571
1572 spin_lock(&nic->cb_lock);
1573
1574 /* Clean CBs marked complete */
1575 for (cb = nic->cb_to_clean;
1576 cb->status & cpu_to_le16(cb_complete);
1577 cb = nic->cb_to_clean = cb->next) {
1578 DPRINTK(TX_DONE, DEBUG, "cb[%d]->status = 0x%04X\n",
1579 (int)(((void*)cb - (void*)nic->cbs)/sizeof(struct cb)),
1580 cb->status);
1581
1582 if (likely(cb->skb != NULL)) {
1583 dev->stats.tx_packets++;
1584 dev->stats.tx_bytes += cb->skb->len;
1585
1586 pci_unmap_single(nic->pdev,
1587 le32_to_cpu(cb->u.tcb.tbd.buf_addr),
1588 le16_to_cpu(cb->u.tcb.tbd.size),
1589 PCI_DMA_TODEVICE);
1590 dev_kfree_skb_any(cb->skb);
1591 cb->skb = NULL;
1592 tx_cleaned = 1;
1593 }
1594 cb->status = 0;
1595 nic->cbs_avail++;
1596 }
1597
1598 spin_unlock(&nic->cb_lock);
1599
1600 /* Recover from running out of Tx resources in xmit_frame */
1601 if (unlikely(tx_cleaned && netif_queue_stopped(nic->netdev)))
1602 netif_wake_queue(nic->netdev);
1603
1604 return tx_cleaned;
1605 }
1606
1607 static void e100_clean_cbs(struct nic *nic)
1608 {
1609 if (nic->cbs) {
1610 while (nic->cbs_avail != nic->params.cbs.count) {
1611 struct cb *cb = nic->cb_to_clean;
1612 if (cb->skb) {
1613 pci_unmap_single(nic->pdev,
1614 le32_to_cpu(cb->u.tcb.tbd.buf_addr),
1615 le16_to_cpu(cb->u.tcb.tbd.size),
1616 PCI_DMA_TODEVICE);
1617 dev_kfree_skb(cb->skb);
1618 }
1619 nic->cb_to_clean = nic->cb_to_clean->next;
1620 nic->cbs_avail++;
1621 }
1622 pci_free_consistent(nic->pdev,
1623 sizeof(struct cb) * nic->params.cbs.count,
1624 nic->cbs, nic->cbs_dma_addr);
1625 nic->cbs = NULL;
1626 nic->cbs_avail = 0;
1627 }
1628 nic->cuc_cmd = cuc_start;
1629 nic->cb_to_use = nic->cb_to_send = nic->cb_to_clean =
1630 nic->cbs;
1631 }
1632
1633 static int e100_alloc_cbs(struct nic *nic)
1634 {
1635 struct cb *cb;
1636 unsigned int i, count = nic->params.cbs.count;
1637
1638 nic->cuc_cmd = cuc_start;
1639 nic->cb_to_use = nic->cb_to_send = nic->cb_to_clean = NULL;
1640 nic->cbs_avail = 0;
1641
1642 nic->cbs = pci_alloc_consistent(nic->pdev,
1643 sizeof(struct cb) * count, &nic->cbs_dma_addr);
1644 if (!nic->cbs)
1645 return -ENOMEM;
1646
1647 for (cb = nic->cbs, i = 0; i < count; cb++, i++) {
1648 cb->next = (i + 1 < count) ? cb + 1 : nic->cbs;
1649 cb->prev = (i == 0) ? nic->cbs + count - 1 : cb - 1;
1650
1651 cb->dma_addr = nic->cbs_dma_addr + i * sizeof(struct cb);
1652 cb->link = cpu_to_le32(nic->cbs_dma_addr +
1653 ((i+1) % count) * sizeof(struct cb));
1654 cb->skb = NULL;
1655 }
1656
1657 nic->cb_to_use = nic->cb_to_send = nic->cb_to_clean = nic->cbs;
1658 nic->cbs_avail = count;
1659
1660 return 0;
1661 }
1662
1663 static inline void e100_start_receiver(struct nic *nic, struct rx *rx)
1664 {
1665 if (!nic->rxs) return;
1666 if (RU_SUSPENDED != nic->ru_running) return;
1667
1668 /* handle init time starts */
1669 if (!rx) rx = nic->rxs;
1670
1671 /* (Re)start RU if suspended or idle and RFA is non-NULL */
1672 if (rx->skb) {
1673 e100_exec_cmd(nic, ruc_start, rx->dma_addr);
1674 nic->ru_running = RU_RUNNING;
1675 }
1676 }
1677
1678 #define RFD_BUF_LEN (sizeof(struct rfd) + VLAN_ETH_FRAME_LEN)
1679 static int e100_rx_alloc_skb(struct nic *nic, struct rx *rx)
1680 {
1681 if (!(rx->skb = netdev_alloc_skb(nic->netdev, RFD_BUF_LEN + NET_IP_ALIGN)))
1682 return -ENOMEM;
1683
1684 /* Align, init, and map the RFD. */
1685 skb_reserve(rx->skb, NET_IP_ALIGN);
1686 skb_copy_to_linear_data(rx->skb, &nic->blank_rfd, sizeof(struct rfd));
1687 rx->dma_addr = pci_map_single(nic->pdev, rx->skb->data,
1688 RFD_BUF_LEN, PCI_DMA_BIDIRECTIONAL);
1689
1690 if (pci_dma_mapping_error(nic->pdev, rx->dma_addr)) {
1691 dev_kfree_skb_any(rx->skb);
1692 rx->skb = NULL;
1693 rx->dma_addr = 0;
1694 return -ENOMEM;
1695 }
1696
1697 /* Link the RFD to end of RFA by linking previous RFD to
1698 * this one. We are safe to touch the previous RFD because
1699 * it is protected by the before last buffer's el bit being set */
1700 if (rx->prev->skb) {
1701 struct rfd *prev_rfd = (struct rfd *)rx->prev->skb->data;
1702 put_unaligned_le32(rx->dma_addr, &prev_rfd->link);
1703 pci_dma_sync_single_for_device(nic->pdev, rx->prev->dma_addr,
1704 sizeof(struct rfd), PCI_DMA_BIDIRECTIONAL);
1705 }
1706
1707 return 0;
1708 }
1709
1710 static int e100_rx_indicate(struct nic *nic, struct rx *rx,
1711 unsigned int *work_done, unsigned int work_to_do)
1712 {
1713 struct net_device *dev = nic->netdev;
1714 struct sk_buff *skb = rx->skb;
1715 struct rfd *rfd = (struct rfd *)skb->data;
1716 u16 rfd_status, actual_size;
1717
1718 if (unlikely(work_done && *work_done >= work_to_do))
1719 return -EAGAIN;
1720
1721 /* Need to sync before taking a peek at cb_complete bit */
1722 pci_dma_sync_single_for_cpu(nic->pdev, rx->dma_addr,
1723 sizeof(struct rfd), PCI_DMA_BIDIRECTIONAL);
1724 rfd_status = le16_to_cpu(rfd->status);
1725
1726 DPRINTK(RX_STATUS, DEBUG, "status=0x%04X\n", rfd_status);
1727
1728 /* If data isn't ready, nothing to indicate */
1729 if (unlikely(!(rfd_status & cb_complete))) {
1730 /* If the next buffer has the el bit, but we think the receiver
1731 * is still running, check to see if it really stopped while
1732 * we had interrupts off.
1733 * This allows for a fast restart without re-enabling
1734 * interrupts */
1735 if ((le16_to_cpu(rfd->command) & cb_el) &&
1736 (RU_RUNNING == nic->ru_running))
1737
1738 if (ioread8(&nic->csr->scb.status) & rus_no_res)
1739 nic->ru_running = RU_SUSPENDED;
1740 return -ENODATA;
1741 }
1742
1743 /* Get actual data size */
1744 actual_size = le16_to_cpu(rfd->actual_size) & 0x3FFF;
1745 if (unlikely(actual_size > RFD_BUF_LEN - sizeof(struct rfd)))
1746 actual_size = RFD_BUF_LEN - sizeof(struct rfd);
1747
1748 /* Get data */
1749 pci_unmap_single(nic->pdev, rx->dma_addr,
1750 RFD_BUF_LEN, PCI_DMA_BIDIRECTIONAL);
1751
1752 /* If this buffer has the el bit, but we think the receiver
1753 * is still running, check to see if it really stopped while
1754 * we had interrupts off.
1755 * This allows for a fast restart without re-enabling interrupts.
1756 * This can happen when the RU sees the size change but also sees
1757 * the el bit set. */
1758 if ((le16_to_cpu(rfd->command) & cb_el) &&
1759 (RU_RUNNING == nic->ru_running)) {
1760
1761 if (ioread8(&nic->csr->scb.status) & rus_no_res)
1762 nic->ru_running = RU_SUSPENDED;
1763 }
1764
1765 /* Pull off the RFD and put the actual data (minus eth hdr) */
1766 skb_reserve(skb, sizeof(struct rfd));
1767 skb_put(skb, actual_size);
1768 skb->protocol = eth_type_trans(skb, nic->netdev);
1769
1770 if (unlikely(!(rfd_status & cb_ok))) {
1771 /* Don't indicate if hardware indicates errors */
1772 dev_kfree_skb_any(skb);
1773 } else if (actual_size > ETH_DATA_LEN + VLAN_ETH_HLEN) {
1774 /* Don't indicate oversized frames */
1775 nic->rx_over_length_errors++;
1776 dev_kfree_skb_any(skb);
1777 } else {
1778 dev->stats.rx_packets++;
1779 dev->stats.rx_bytes += actual_size;
1780 netif_receive_skb(skb);
1781 if (work_done)
1782 (*work_done)++;
1783 }
1784
1785 rx->skb = NULL;
1786
1787 return 0;
1788 }
1789
1790 static void e100_rx_clean(struct nic *nic, unsigned int *work_done,
1791 unsigned int work_to_do)
1792 {
1793 struct rx *rx;
1794 int restart_required = 0, err = 0;
1795 struct rx *old_before_last_rx, *new_before_last_rx;
1796 struct rfd *old_before_last_rfd, *new_before_last_rfd;
1797
1798 /* Indicate newly arrived packets */
1799 for (rx = nic->rx_to_clean; rx->skb; rx = nic->rx_to_clean = rx->next) {
1800 err = e100_rx_indicate(nic, rx, work_done, work_to_do);
1801 /* Hit quota or no more to clean */
1802 if (-EAGAIN == err || -ENODATA == err)
1803 break;
1804 }
1805
1806
1807 /* On EAGAIN, hit quota so have more work to do, restart once
1808 * cleanup is complete.
1809 * Else, are we already rnr? then pay attention!!! this ensures that
1810 * the state machine progression never allows a start with a
1811 * partially cleaned list, avoiding a race between hardware
1812 * and rx_to_clean when in NAPI mode */
1813 if (-EAGAIN != err && RU_SUSPENDED == nic->ru_running)
1814 restart_required = 1;
1815
1816 old_before_last_rx = nic->rx_to_use->prev->prev;
1817 old_before_last_rfd = (struct rfd *)old_before_last_rx->skb->data;
1818
1819 /* Alloc new skbs to refill list */
1820 for (rx = nic->rx_to_use; !rx->skb; rx = nic->rx_to_use = rx->next) {
1821 if (unlikely(e100_rx_alloc_skb(nic, rx)))
1822 break; /* Better luck next time (see watchdog) */
1823 }
1824
1825 new_before_last_rx = nic->rx_to_use->prev->prev;
1826 if (new_before_last_rx != old_before_last_rx) {
1827 /* Set the el-bit on the buffer that is before the last buffer.
1828 * This lets us update the next pointer on the last buffer
1829 * without worrying about hardware touching it.
1830 * We set the size to 0 to prevent hardware from touching this
1831 * buffer.
1832 * When the hardware hits the before last buffer with el-bit
1833 * and size of 0, it will RNR interrupt, the RUS will go into
1834 * the No Resources state. It will not complete nor write to
1835 * this buffer. */
1836 new_before_last_rfd =
1837 (struct rfd *)new_before_last_rx->skb->data;
1838 new_before_last_rfd->size = 0;
1839 new_before_last_rfd->command |= cpu_to_le16(cb_el);
1840 pci_dma_sync_single_for_device(nic->pdev,
1841 new_before_last_rx->dma_addr, sizeof(struct rfd),
1842 PCI_DMA_BIDIRECTIONAL);
1843
1844 /* Now that we have a new stopping point, we can clear the old
1845 * stopping point. We must sync twice to get the proper
1846 * ordering on the hardware side of things. */
1847 old_before_last_rfd->command &= ~cpu_to_le16(cb_el);
1848 pci_dma_sync_single_for_device(nic->pdev,
1849 old_before_last_rx->dma_addr, sizeof(struct rfd),
1850 PCI_DMA_BIDIRECTIONAL);
1851 old_before_last_rfd->size = cpu_to_le16(VLAN_ETH_FRAME_LEN);
1852 pci_dma_sync_single_for_device(nic->pdev,
1853 old_before_last_rx->dma_addr, sizeof(struct rfd),
1854 PCI_DMA_BIDIRECTIONAL);
1855 }
1856
1857 if (restart_required) {
1858 // ack the rnr?
1859 iowrite8(stat_ack_rnr, &nic->csr->scb.stat_ack);
1860 e100_start_receiver(nic, nic->rx_to_clean);
1861 if (work_done)
1862 (*work_done)++;
1863 }
1864 }
1865
1866 static void e100_rx_clean_list(struct nic *nic)
1867 {
1868 struct rx *rx;
1869 unsigned int i, count = nic->params.rfds.count;
1870
1871 nic->ru_running = RU_UNINITIALIZED;
1872
1873 if (nic->rxs) {
1874 for (rx = nic->rxs, i = 0; i < count; rx++, i++) {
1875 if (rx->skb) {
1876 pci_unmap_single(nic->pdev, rx->dma_addr,
1877 RFD_BUF_LEN, PCI_DMA_BIDIRECTIONAL);
1878 dev_kfree_skb(rx->skb);
1879 }
1880 }
1881 kfree(nic->rxs);
1882 nic->rxs = NULL;
1883 }
1884
1885 nic->rx_to_use = nic->rx_to_clean = NULL;
1886 }
1887
1888 static int e100_rx_alloc_list(struct nic *nic)
1889 {
1890 struct rx *rx;
1891 unsigned int i, count = nic->params.rfds.count;
1892 struct rfd *before_last;
1893
1894 nic->rx_to_use = nic->rx_to_clean = NULL;
1895 nic->ru_running = RU_UNINITIALIZED;
1896
1897 if (!(nic->rxs = kcalloc(count, sizeof(struct rx), GFP_ATOMIC)))
1898 return -ENOMEM;
1899
1900 for (rx = nic->rxs, i = 0; i < count; rx++, i++) {
1901 rx->next = (i + 1 < count) ? rx + 1 : nic->rxs;
1902 rx->prev = (i == 0) ? nic->rxs + count - 1 : rx - 1;
1903 if (e100_rx_alloc_skb(nic, rx)) {
1904 e100_rx_clean_list(nic);
1905 return -ENOMEM;
1906 }
1907 }
1908 /* Set the el-bit on the buffer that is before the last buffer.
1909 * This lets us update the next pointer on the last buffer without
1910 * worrying about hardware touching it.
1911 * We set the size to 0 to prevent hardware from touching this buffer.
1912 * When the hardware hits the before last buffer with el-bit and size
1913 * of 0, it will RNR interrupt, the RU will go into the No Resources
1914 * state. It will not complete nor write to this buffer. */
1915 rx = nic->rxs->prev->prev;
1916 before_last = (struct rfd *)rx->skb->data;
1917 before_last->command |= cpu_to_le16(cb_el);
1918 before_last->size = 0;
1919 pci_dma_sync_single_for_device(nic->pdev, rx->dma_addr,
1920 sizeof(struct rfd), PCI_DMA_BIDIRECTIONAL);
1921
1922 nic->rx_to_use = nic->rx_to_clean = nic->rxs;
1923 nic->ru_running = RU_SUSPENDED;
1924
1925 return 0;
1926 }
1927
1928 static irqreturn_t e100_intr(int irq, void *dev_id)
1929 {
1930 struct net_device *netdev = dev_id;
1931 struct nic *nic = netdev_priv(netdev);
1932 u8 stat_ack = ioread8(&nic->csr->scb.stat_ack);
1933
1934 DPRINTK(INTR, DEBUG, "stat_ack = 0x%02X\n", stat_ack);
1935
1936 if (stat_ack == stat_ack_not_ours || /* Not our interrupt */
1937 stat_ack == stat_ack_not_present) /* Hardware is ejected */
1938 return IRQ_NONE;
1939
1940 /* Ack interrupt(s) */
1941 iowrite8(stat_ack, &nic->csr->scb.stat_ack);
1942
1943 /* We hit Receive No Resource (RNR); restart RU after cleaning */
1944 if (stat_ack & stat_ack_rnr)
1945 nic->ru_running = RU_SUSPENDED;
1946
1947 if (likely(netif_rx_schedule_prep(&nic->napi))) {
1948 e100_disable_irq(nic);
1949 __netif_rx_schedule(&nic->napi);
1950 }
1951
1952 return IRQ_HANDLED;
1953 }
1954
1955 static int e100_poll(struct napi_struct *napi, int budget)
1956 {
1957 struct nic *nic = container_of(napi, struct nic, napi);
1958 unsigned int work_done = 0;
1959
1960 e100_rx_clean(nic, &work_done, budget);
1961 e100_tx_clean(nic);
1962
1963 /* If budget not fully consumed, exit the polling mode */
1964 if (work_done < budget) {
1965 netif_rx_complete(napi);
1966 e100_enable_irq(nic);
1967 }
1968
1969 return work_done;
1970 }
1971
1972 #ifdef CONFIG_NET_POLL_CONTROLLER
1973 static void e100_netpoll(struct net_device *netdev)
1974 {
1975 struct nic *nic = netdev_priv(netdev);
1976
1977 e100_disable_irq(nic);
1978 e100_intr(nic->pdev->irq, netdev);
1979 e100_tx_clean(nic);
1980 e100_enable_irq(nic);
1981 }
1982 #endif
1983
1984 static int e100_set_mac_address(struct net_device *netdev, void *p)
1985 {
1986 struct nic *nic = netdev_priv(netdev);
1987 struct sockaddr *addr = p;
1988
1989 if (!is_valid_ether_addr(addr->sa_data))
1990 return -EADDRNOTAVAIL;
1991
1992 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1993 e100_exec_cb(nic, NULL, e100_setup_iaaddr);
1994
1995 return 0;
1996 }
1997
1998 static int e100_change_mtu(struct net_device *netdev, int new_mtu)
1999 {
2000 if (new_mtu < ETH_ZLEN || new_mtu > ETH_DATA_LEN)
2001 return -EINVAL;
2002 netdev->mtu = new_mtu;
2003 return 0;
2004 }
2005
2006 static int e100_asf(struct nic *nic)
2007 {
2008 /* ASF can be enabled from eeprom */
2009 return((nic->pdev->device >= 0x1050) && (nic->pdev->device <= 0x1057) &&
2010 (nic->eeprom[eeprom_config_asf] & eeprom_asf) &&
2011 !(nic->eeprom[eeprom_config_asf] & eeprom_gcl) &&
2012 ((nic->eeprom[eeprom_smbus_addr] & 0xFF) != 0xFE));
2013 }
2014
2015 static int e100_up(struct nic *nic)
2016 {
2017 int err;
2018
2019 if ((err = e100_rx_alloc_list(nic)))
2020 return err;
2021 if ((err = e100_alloc_cbs(nic)))
2022 goto err_rx_clean_list;
2023 if ((err = e100_hw_init(nic)))
2024 goto err_clean_cbs;
2025 e100_set_multicast_list(nic->netdev);
2026 e100_start_receiver(nic, NULL);
2027 mod_timer(&nic->watchdog, jiffies);
2028 if ((err = request_irq(nic->pdev->irq, e100_intr, IRQF_SHARED,
2029 nic->netdev->name, nic->netdev)))
2030 goto err_no_irq;
2031 netif_wake_queue(nic->netdev);
2032 napi_enable(&nic->napi);
2033 /* enable ints _after_ enabling poll, preventing a race between
2034 * disable ints+schedule */
2035 e100_enable_irq(nic);
2036 return 0;
2037
2038 err_no_irq:
2039 del_timer_sync(&nic->watchdog);
2040 err_clean_cbs:
2041 e100_clean_cbs(nic);
2042 err_rx_clean_list:
2043 e100_rx_clean_list(nic);
2044 return err;
2045 }
2046
2047 static void e100_down(struct nic *nic)
2048 {
2049 /* wait here for poll to complete */
2050 napi_disable(&nic->napi);
2051 netif_stop_queue(nic->netdev);
2052 e100_hw_reset(nic);
2053 free_irq(nic->pdev->irq, nic->netdev);
2054 del_timer_sync(&nic->watchdog);
2055 netif_carrier_off(nic->netdev);
2056 e100_clean_cbs(nic);
2057 e100_rx_clean_list(nic);
2058 }
2059
2060 static void e100_tx_timeout(struct net_device *netdev)
2061 {
2062 struct nic *nic = netdev_priv(netdev);
2063
2064 /* Reset outside of interrupt context, to avoid request_irq
2065 * in interrupt context */
2066 schedule_work(&nic->tx_timeout_task);
2067 }
2068
2069 static void e100_tx_timeout_task(struct work_struct *work)
2070 {
2071 struct nic *nic = container_of(work, struct nic, tx_timeout_task);
2072 struct net_device *netdev = nic->netdev;
2073
2074 DPRINTK(TX_ERR, DEBUG, "scb.status=0x%02X\n",
2075 ioread8(&nic->csr->scb.status));
2076 e100_down(netdev_priv(netdev));
2077 e100_up(netdev_priv(netdev));
2078 }
2079
2080 static int e100_loopback_test(struct nic *nic, enum loopback loopback_mode)
2081 {
2082 int err;
2083 struct sk_buff *skb;
2084
2085 /* Use driver resources to perform internal MAC or PHY
2086 * loopback test. A single packet is prepared and transmitted
2087 * in loopback mode, and the test passes if the received
2088 * packet compares byte-for-byte to the transmitted packet. */
2089
2090 if ((err = e100_rx_alloc_list(nic)))
2091 return err;
2092 if ((err = e100_alloc_cbs(nic)))
2093 goto err_clean_rx;
2094
2095 /* ICH PHY loopback is broken so do MAC loopback instead */
2096 if (nic->flags & ich && loopback_mode == lb_phy)
2097 loopback_mode = lb_mac;
2098
2099 nic->loopback = loopback_mode;
2100 if ((err = e100_hw_init(nic)))
2101 goto err_loopback_none;
2102
2103 if (loopback_mode == lb_phy)
2104 mdio_write(nic->netdev, nic->mii.phy_id, MII_BMCR,
2105 BMCR_LOOPBACK);
2106
2107 e100_start_receiver(nic, NULL);
2108
2109 if (!(skb = netdev_alloc_skb(nic->netdev, ETH_DATA_LEN))) {
2110 err = -ENOMEM;
2111 goto err_loopback_none;
2112 }
2113 skb_put(skb, ETH_DATA_LEN);
2114 memset(skb->data, 0xFF, ETH_DATA_LEN);
2115 e100_xmit_frame(skb, nic->netdev);
2116
2117 msleep(10);
2118
2119 pci_dma_sync_single_for_cpu(nic->pdev, nic->rx_to_clean->dma_addr,
2120 RFD_BUF_LEN, PCI_DMA_BIDIRECTIONAL);
2121
2122 if (memcmp(nic->rx_to_clean->skb->data + sizeof(struct rfd),
2123 skb->data, ETH_DATA_LEN))
2124 err = -EAGAIN;
2125
2126 err_loopback_none:
2127 mdio_write(nic->netdev, nic->mii.phy_id, MII_BMCR, 0);
2128 nic->loopback = lb_none;
2129 e100_clean_cbs(nic);
2130 e100_hw_reset(nic);
2131 err_clean_rx:
2132 e100_rx_clean_list(nic);
2133 return err;
2134 }
2135
2136 #define MII_LED_CONTROL 0x1B
2137 static void e100_blink_led(unsigned long data)
2138 {
2139 struct nic *nic = (struct nic *)data;
2140 enum led_state {
2141 led_on = 0x01,
2142 led_off = 0x04,
2143 led_on_559 = 0x05,
2144 led_on_557 = 0x07,
2145 };
2146
2147 nic->leds = (nic->leds & led_on) ? led_off :
2148 (nic->mac < mac_82559_D101M) ? led_on_557 : led_on_559;
2149 mdio_write(nic->netdev, nic->mii.phy_id, MII_LED_CONTROL, nic->leds);
2150 mod_timer(&nic->blink_timer, jiffies + HZ / 4);
2151 }
2152
2153 static int e100_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
2154 {
2155 struct nic *nic = netdev_priv(netdev);
2156 return mii_ethtool_gset(&nic->mii, cmd);
2157 }
2158
2159 static int e100_set_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
2160 {
2161 struct nic *nic = netdev_priv(netdev);
2162 int err;
2163
2164 mdio_write(netdev, nic->mii.phy_id, MII_BMCR, BMCR_RESET);
2165 err = mii_ethtool_sset(&nic->mii, cmd);
2166 e100_exec_cb(nic, NULL, e100_configure);
2167
2168 return err;
2169 }
2170
2171 static void e100_get_drvinfo(struct net_device *netdev,
2172 struct ethtool_drvinfo *info)
2173 {
2174 struct nic *nic = netdev_priv(netdev);
2175 strcpy(info->driver, DRV_NAME);
2176 strcpy(info->version, DRV_VERSION);
2177 strcpy(info->fw_version, "N/A");
2178 strcpy(info->bus_info, pci_name(nic->pdev));
2179 }
2180
2181 #define E100_PHY_REGS 0x1C
2182 static int e100_get_regs_len(struct net_device *netdev)
2183 {
2184 struct nic *nic = netdev_priv(netdev);
2185 return 1 + E100_PHY_REGS + sizeof(nic->mem->dump_buf);
2186 }
2187
2188 static void e100_get_regs(struct net_device *netdev,
2189 struct ethtool_regs *regs, void *p)
2190 {
2191 struct nic *nic = netdev_priv(netdev);
2192 u32 *buff = p;
2193 int i;
2194
2195 regs->version = (1 << 24) | nic->pdev->revision;
2196 buff[0] = ioread8(&nic->csr->scb.cmd_hi) << 24 |
2197 ioread8(&nic->csr->scb.cmd_lo) << 16 |
2198 ioread16(&nic->csr->scb.status);
2199 for (i = E100_PHY_REGS; i >= 0; i--)
2200 buff[1 + E100_PHY_REGS - i] =
2201 mdio_read(netdev, nic->mii.phy_id, i);
2202 memset(nic->mem->dump_buf, 0, sizeof(nic->mem->dump_buf));
2203 e100_exec_cb(nic, NULL, e100_dump);
2204 msleep(10);
2205 memcpy(&buff[2 + E100_PHY_REGS], nic->mem->dump_buf,
2206 sizeof(nic->mem->dump_buf));
2207 }
2208
2209 static void e100_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
2210 {
2211 struct nic *nic = netdev_priv(netdev);
2212 wol->supported = (nic->mac >= mac_82558_D101_A4) ? WAKE_MAGIC : 0;
2213 wol->wolopts = (nic->flags & wol_magic) ? WAKE_MAGIC : 0;
2214 }
2215
2216 static int e100_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
2217 {
2218 struct nic *nic = netdev_priv(netdev);
2219
2220 if ((wol->wolopts && wol->wolopts != WAKE_MAGIC) ||
2221 !device_can_wakeup(&nic->pdev->dev))
2222 return -EOPNOTSUPP;
2223
2224 if (wol->wolopts)
2225 nic->flags |= wol_magic;
2226 else
2227 nic->flags &= ~wol_magic;
2228
2229 device_set_wakeup_enable(&nic->pdev->dev, wol->wolopts);
2230
2231 e100_exec_cb(nic, NULL, e100_configure);
2232
2233 return 0;
2234 }
2235
2236 static u32 e100_get_msglevel(struct net_device *netdev)
2237 {
2238 struct nic *nic = netdev_priv(netdev);
2239 return nic->msg_enable;
2240 }
2241
2242 static void e100_set_msglevel(struct net_device *netdev, u32 value)
2243 {
2244 struct nic *nic = netdev_priv(netdev);
2245 nic->msg_enable = value;
2246 }
2247
2248 static int e100_nway_reset(struct net_device *netdev)
2249 {
2250 struct nic *nic = netdev_priv(netdev);
2251 return mii_nway_restart(&nic->mii);
2252 }
2253
2254 static u32 e100_get_link(struct net_device *netdev)
2255 {
2256 struct nic *nic = netdev_priv(netdev);
2257 return mii_link_ok(&nic->mii);
2258 }
2259
2260 static int e100_get_eeprom_len(struct net_device *netdev)
2261 {
2262 struct nic *nic = netdev_priv(netdev);
2263 return nic->eeprom_wc << 1;
2264 }
2265
2266 #define E100_EEPROM_MAGIC 0x1234
2267 static int e100_get_eeprom(struct net_device *netdev,
2268 struct ethtool_eeprom *eeprom, u8 *bytes)
2269 {
2270 struct nic *nic = netdev_priv(netdev);
2271
2272 eeprom->magic = E100_EEPROM_MAGIC;
2273 memcpy(bytes, &((u8 *)nic->eeprom)[eeprom->offset], eeprom->len);
2274
2275 return 0;
2276 }
2277
2278 static int e100_set_eeprom(struct net_device *netdev,
2279 struct ethtool_eeprom *eeprom, u8 *bytes)
2280 {
2281 struct nic *nic = netdev_priv(netdev);
2282
2283 if (eeprom->magic != E100_EEPROM_MAGIC)
2284 return -EINVAL;
2285
2286 memcpy(&((u8 *)nic->eeprom)[eeprom->offset], bytes, eeprom->len);
2287
2288 return e100_eeprom_save(nic, eeprom->offset >> 1,
2289 (eeprom->len >> 1) + 1);
2290 }
2291
2292 static void e100_get_ringparam(struct net_device *netdev,
2293 struct ethtool_ringparam *ring)
2294 {
2295 struct nic *nic = netdev_priv(netdev);
2296 struct param_range *rfds = &nic->params.rfds;
2297 struct param_range *cbs = &nic->params.cbs;
2298
2299 ring->rx_max_pending = rfds->max;
2300 ring->tx_max_pending = cbs->max;
2301 ring->rx_mini_max_pending = 0;
2302 ring->rx_jumbo_max_pending = 0;
2303 ring->rx_pending = rfds->count;
2304 ring->tx_pending = cbs->count;
2305 ring->rx_mini_pending = 0;
2306 ring->rx_jumbo_pending = 0;
2307 }
2308
2309 static int e100_set_ringparam(struct net_device *netdev,
2310 struct ethtool_ringparam *ring)
2311 {
2312 struct nic *nic = netdev_priv(netdev);
2313 struct param_range *rfds = &nic->params.rfds;
2314 struct param_range *cbs = &nic->params.cbs;
2315
2316 if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
2317 return -EINVAL;
2318
2319 if (netif_running(netdev))
2320 e100_down(nic);
2321 rfds->count = max(ring->rx_pending, rfds->min);
2322 rfds->count = min(rfds->count, rfds->max);
2323 cbs->count = max(ring->tx_pending, cbs->min);
2324 cbs->count = min(cbs->count, cbs->max);
2325 DPRINTK(DRV, INFO, "Ring Param settings: rx: %d, tx %d\n",
2326 rfds->count, cbs->count);
2327 if (netif_running(netdev))
2328 e100_up(nic);
2329
2330 return 0;
2331 }
2332
2333 static const char e100_gstrings_test[][ETH_GSTRING_LEN] = {
2334 "Link test (on/offline)",
2335 "Eeprom test (on/offline)",
2336 "Self test (offline)",
2337 "Mac loopback (offline)",
2338 "Phy loopback (offline)",
2339 };
2340 #define E100_TEST_LEN ARRAY_SIZE(e100_gstrings_test)
2341
2342 static void e100_diag_test(struct net_device *netdev,
2343 struct ethtool_test *test, u64 *data)
2344 {
2345 struct ethtool_cmd cmd;
2346 struct nic *nic = netdev_priv(netdev);
2347 int i, err;
2348
2349 memset(data, 0, E100_TEST_LEN * sizeof(u64));
2350 data[0] = !mii_link_ok(&nic->mii);
2351 data[1] = e100_eeprom_load(nic);
2352 if (test->flags & ETH_TEST_FL_OFFLINE) {
2353
2354 /* save speed, duplex & autoneg settings */
2355 err = mii_ethtool_gset(&nic->mii, &cmd);
2356
2357 if (netif_running(netdev))
2358 e100_down(nic);
2359 data[2] = e100_self_test(nic);
2360 data[3] = e100_loopback_test(nic, lb_mac);
2361 data[4] = e100_loopback_test(nic, lb_phy);
2362
2363 /* restore speed, duplex & autoneg settings */
2364 err = mii_ethtool_sset(&nic->mii, &cmd);
2365
2366 if (netif_running(netdev))
2367 e100_up(nic);
2368 }
2369 for (i = 0; i < E100_TEST_LEN; i++)
2370 test->flags |= data[i] ? ETH_TEST_FL_FAILED : 0;
2371
2372 msleep_interruptible(4 * 1000);
2373 }
2374
2375 static int e100_phys_id(struct net_device *netdev, u32 data)
2376 {
2377 struct nic *nic = netdev_priv(netdev);
2378
2379 if (!data || data > (u32)(MAX_SCHEDULE_TIMEOUT / HZ))
2380 data = (u32)(MAX_SCHEDULE_TIMEOUT / HZ);
2381 mod_timer(&nic->blink_timer, jiffies);
2382 msleep_interruptible(data * 1000);
2383 del_timer_sync(&nic->blink_timer);
2384 mdio_write(netdev, nic->mii.phy_id, MII_LED_CONTROL, 0);
2385
2386 return 0;
2387 }
2388
2389 static const char e100_gstrings_stats[][ETH_GSTRING_LEN] = {
2390 "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
2391 "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
2392 "rx_length_errors", "rx_over_errors", "rx_crc_errors",
2393 "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
2394 "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
2395 "tx_heartbeat_errors", "tx_window_errors",
2396 /* device-specific stats */
2397 "tx_deferred", "tx_single_collisions", "tx_multi_collisions",
2398 "tx_flow_control_pause", "rx_flow_control_pause",
2399 "rx_flow_control_unsupported", "tx_tco_packets", "rx_tco_packets",
2400 };
2401 #define E100_NET_STATS_LEN 21
2402 #define E100_STATS_LEN ARRAY_SIZE(e100_gstrings_stats)
2403
2404 static int e100_get_sset_count(struct net_device *netdev, int sset)
2405 {
2406 switch (sset) {
2407 case ETH_SS_TEST:
2408 return E100_TEST_LEN;
2409 case ETH_SS_STATS:
2410 return E100_STATS_LEN;
2411 default:
2412 return -EOPNOTSUPP;
2413 }
2414 }
2415
2416 static void e100_get_ethtool_stats(struct net_device *netdev,
2417 struct ethtool_stats *stats, u64 *data)
2418 {
2419 struct nic *nic = netdev_priv(netdev);
2420 int i;
2421
2422 for (i = 0; i < E100_NET_STATS_LEN; i++)
2423 data[i] = ((unsigned long *)&netdev->stats)[i];
2424
2425 data[i++] = nic->tx_deferred;
2426 data[i++] = nic->tx_single_collisions;
2427 data[i++] = nic->tx_multiple_collisions;
2428 data[i++] = nic->tx_fc_pause;
2429 data[i++] = nic->rx_fc_pause;
2430 data[i++] = nic->rx_fc_unsupported;
2431 data[i++] = nic->tx_tco_frames;
2432 data[i++] = nic->rx_tco_frames;
2433 }
2434
2435 static void e100_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
2436 {
2437 switch (stringset) {
2438 case ETH_SS_TEST:
2439 memcpy(data, *e100_gstrings_test, sizeof(e100_gstrings_test));
2440 break;
2441 case ETH_SS_STATS:
2442 memcpy(data, *e100_gstrings_stats, sizeof(e100_gstrings_stats));
2443 break;
2444 }
2445 }
2446
2447 static const struct ethtool_ops e100_ethtool_ops = {
2448 .get_settings = e100_get_settings,
2449 .set_settings = e100_set_settings,
2450 .get_drvinfo = e100_get_drvinfo,
2451 .get_regs_len = e100_get_regs_len,
2452 .get_regs = e100_get_regs,
2453 .get_wol = e100_get_wol,
2454 .set_wol = e100_set_wol,
2455 .get_msglevel = e100_get_msglevel,
2456 .set_msglevel = e100_set_msglevel,
2457 .nway_reset = e100_nway_reset,
2458 .get_link = e100_get_link,
2459 .get_eeprom_len = e100_get_eeprom_len,
2460 .get_eeprom = e100_get_eeprom,
2461 .set_eeprom = e100_set_eeprom,
2462 .get_ringparam = e100_get_ringparam,
2463 .set_ringparam = e100_set_ringparam,
2464 .self_test = e100_diag_test,
2465 .get_strings = e100_get_strings,
2466 .phys_id = e100_phys_id,
2467 .get_ethtool_stats = e100_get_ethtool_stats,
2468 .get_sset_count = e100_get_sset_count,
2469 };
2470
2471 static int e100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2472 {
2473 struct nic *nic = netdev_priv(netdev);
2474
2475 return generic_mii_ioctl(&nic->mii, if_mii(ifr), cmd, NULL);
2476 }
2477
2478 static int e100_alloc(struct nic *nic)
2479 {
2480 nic->mem = pci_alloc_consistent(nic->pdev, sizeof(struct mem),
2481 &nic->dma_addr);
2482 return nic->mem ? 0 : -ENOMEM;
2483 }
2484
2485 static void e100_free(struct nic *nic)
2486 {
2487 if (nic->mem) {
2488 pci_free_consistent(nic->pdev, sizeof(struct mem),
2489 nic->mem, nic->dma_addr);
2490 nic->mem = NULL;
2491 }
2492 }
2493
2494 static int e100_open(struct net_device *netdev)
2495 {
2496 struct nic *nic = netdev_priv(netdev);
2497 int err = 0;
2498
2499 netif_carrier_off(netdev);
2500 if ((err = e100_up(nic)))
2501 DPRINTK(IFUP, ERR, "Cannot open interface, aborting.\n");
2502 return err;
2503 }
2504
2505 static int e100_close(struct net_device *netdev)
2506 {
2507 e100_down(netdev_priv(netdev));
2508 return 0;
2509 }
2510
2511 static const struct net_device_ops e100_netdev_ops = {
2512 .ndo_open = e100_open,
2513 .ndo_stop = e100_close,
2514 .ndo_start_xmit = e100_xmit_frame,
2515 .ndo_validate_addr = eth_validate_addr,
2516 .ndo_set_multicast_list = e100_set_multicast_list,
2517 .ndo_set_mac_address = e100_set_mac_address,
2518 .ndo_change_mtu = e100_change_mtu,
2519 .ndo_do_ioctl = e100_do_ioctl,
2520 .ndo_tx_timeout = e100_tx_timeout,
2521 #ifdef CONFIG_NET_POLL_CONTROLLER
2522 .ndo_poll_controller = e100_netpoll,
2523 #endif
2524 };
2525
2526 static int __devinit e100_probe(struct pci_dev *pdev,
2527 const struct pci_device_id *ent)
2528 {
2529 struct net_device *netdev;
2530 struct nic *nic;
2531 int err;
2532
2533 if (!(netdev = alloc_etherdev(sizeof(struct nic)))) {
2534 if (((1 << debug) - 1) & NETIF_MSG_PROBE)
2535 printk(KERN_ERR PFX "Etherdev alloc failed, abort.\n");
2536 return -ENOMEM;
2537 }
2538
2539 netdev->netdev_ops = &e100_netdev_ops;
2540 SET_ETHTOOL_OPS(netdev, &e100_ethtool_ops);
2541 netdev->watchdog_timeo = E100_WATCHDOG_PERIOD;
2542 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2543
2544 nic = netdev_priv(netdev);
2545 netif_napi_add(netdev, &nic->napi, e100_poll, E100_NAPI_WEIGHT);
2546 nic->netdev = netdev;
2547 nic->pdev = pdev;
2548 nic->msg_enable = (1 << debug) - 1;
2549 pci_set_drvdata(pdev, netdev);
2550
2551 if ((err = pci_enable_device(pdev))) {
2552 DPRINTK(PROBE, ERR, "Cannot enable PCI device, aborting.\n");
2553 goto err_out_free_dev;
2554 }
2555
2556 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2557 DPRINTK(PROBE, ERR, "Cannot find proper PCI device "
2558 "base address, aborting.\n");
2559 err = -ENODEV;
2560 goto err_out_disable_pdev;
2561 }
2562
2563 if ((err = pci_request_regions(pdev, DRV_NAME))) {
2564 DPRINTK(PROBE, ERR, "Cannot obtain PCI resources, aborting.\n");
2565 goto err_out_disable_pdev;
2566 }
2567
2568 if ((err = pci_set_dma_mask(pdev, DMA_32BIT_MASK))) {
2569 DPRINTK(PROBE, ERR, "No usable DMA configuration, aborting.\n");
2570 goto err_out_free_res;
2571 }
2572
2573 SET_NETDEV_DEV(netdev, &pdev->dev);
2574
2575 if (use_io)
2576 DPRINTK(PROBE, INFO, "using i/o access mode\n");
2577
2578 nic->csr = pci_iomap(pdev, (use_io ? 1 : 0), sizeof(struct csr));
2579 if (!nic->csr) {
2580 DPRINTK(PROBE, ERR, "Cannot map device registers, aborting.\n");
2581 err = -ENOMEM;
2582 goto err_out_free_res;
2583 }
2584
2585 if (ent->driver_data)
2586 nic->flags |= ich;
2587 else
2588 nic->flags &= ~ich;
2589
2590 e100_get_defaults(nic);
2591
2592 /* locks must be initialized before calling hw_reset */
2593 spin_lock_init(&nic->cb_lock);
2594 spin_lock_init(&nic->cmd_lock);
2595 spin_lock_init(&nic->mdio_lock);
2596
2597 /* Reset the device before pci_set_master() in case device is in some
2598 * funky state and has an interrupt pending - hint: we don't have the
2599 * interrupt handler registered yet. */
2600 e100_hw_reset(nic);
2601
2602 pci_set_master(pdev);
2603
2604 init_timer(&nic->watchdog);
2605 nic->watchdog.function = e100_watchdog;
2606 nic->watchdog.data = (unsigned long)nic;
2607 init_timer(&nic->blink_timer);
2608 nic->blink_timer.function = e100_blink_led;
2609 nic->blink_timer.data = (unsigned long)nic;
2610
2611 INIT_WORK(&nic->tx_timeout_task, e100_tx_timeout_task);
2612
2613 if ((err = e100_alloc(nic))) {
2614 DPRINTK(PROBE, ERR, "Cannot alloc driver memory, aborting.\n");
2615 goto err_out_iounmap;
2616 }
2617
2618 if ((err = e100_eeprom_load(nic)))
2619 goto err_out_free;
2620
2621 e100_phy_init(nic);
2622
2623 memcpy(netdev->dev_addr, nic->eeprom, ETH_ALEN);
2624 memcpy(netdev->perm_addr, nic->eeprom, ETH_ALEN);
2625 if (!is_valid_ether_addr(netdev->perm_addr)) {
2626 if (!eeprom_bad_csum_allow) {
2627 DPRINTK(PROBE, ERR, "Invalid MAC address from "
2628 "EEPROM, aborting.\n");
2629 err = -EAGAIN;
2630 goto err_out_free;
2631 } else {
2632 DPRINTK(PROBE, ERR, "Invalid MAC address from EEPROM, "
2633 "you MUST configure one.\n");
2634 }
2635 }
2636
2637 /* Wol magic packet can be enabled from eeprom */
2638 if ((nic->mac >= mac_82558_D101_A4) &&
2639 (nic->eeprom[eeprom_id] & eeprom_id_wol)) {
2640 nic->flags |= wol_magic;
2641 device_set_wakeup_enable(&pdev->dev, true);
2642 }
2643
2644 /* ack any pending wake events, disable PME */
2645 pci_pme_active(pdev, false);
2646
2647 strcpy(netdev->name, "eth%d");
2648 if ((err = register_netdev(netdev))) {
2649 DPRINTK(PROBE, ERR, "Cannot register net device, aborting.\n");
2650 goto err_out_free;
2651 }
2652
2653 DPRINTK(PROBE, INFO, "addr 0x%llx, irq %d, MAC addr %pM\n",
2654 (unsigned long long)pci_resource_start(pdev, use_io ? 1 : 0),
2655 pdev->irq, netdev->dev_addr);
2656
2657 return 0;
2658
2659 err_out_free:
2660 e100_free(nic);
2661 err_out_iounmap:
2662 pci_iounmap(pdev, nic->csr);
2663 err_out_free_res:
2664 pci_release_regions(pdev);
2665 err_out_disable_pdev:
2666 pci_disable_device(pdev);
2667 err_out_free_dev:
2668 pci_set_drvdata(pdev, NULL);
2669 free_netdev(netdev);
2670 return err;
2671 }
2672
2673 static void __devexit e100_remove(struct pci_dev *pdev)
2674 {
2675 struct net_device *netdev = pci_get_drvdata(pdev);
2676
2677 if (netdev) {
2678 struct nic *nic = netdev_priv(netdev);
2679 unregister_netdev(netdev);
2680 e100_free(nic);
2681 pci_iounmap(pdev, nic->csr);
2682 free_netdev(netdev);
2683 pci_release_regions(pdev);
2684 pci_disable_device(pdev);
2685 pci_set_drvdata(pdev, NULL);
2686 }
2687 }
2688
2689 static int e100_suspend(struct pci_dev *pdev, pm_message_t state)
2690 {
2691 struct net_device *netdev = pci_get_drvdata(pdev);
2692 struct nic *nic = netdev_priv(netdev);
2693
2694 if (netif_running(netdev))
2695 e100_down(nic);
2696 netif_device_detach(netdev);
2697
2698 pci_save_state(pdev);
2699
2700 if ((nic->flags & wol_magic) | e100_asf(nic)) {
2701 if (pci_enable_wake(pdev, PCI_D3cold, true))
2702 pci_enable_wake(pdev, PCI_D3hot, true);
2703 } else {
2704 pci_enable_wake(pdev, PCI_D3hot, false);
2705 }
2706
2707 pci_disable_device(pdev);
2708 pci_set_power_state(pdev, PCI_D3hot);
2709
2710 return 0;
2711 }
2712
2713 #ifdef CONFIG_PM
2714 static int e100_resume(struct pci_dev *pdev)
2715 {
2716 struct net_device *netdev = pci_get_drvdata(pdev);
2717 struct nic *nic = netdev_priv(netdev);
2718
2719 pci_set_power_state(pdev, PCI_D0);
2720 pci_restore_state(pdev);
2721 /* ack any pending wake events, disable PME */
2722 pci_enable_wake(pdev, 0, 0);
2723
2724 netif_device_attach(netdev);
2725 if (netif_running(netdev))
2726 e100_up(nic);
2727
2728 return 0;
2729 }
2730 #endif /* CONFIG_PM */
2731
2732 static void e100_shutdown(struct pci_dev *pdev)
2733 {
2734 e100_suspend(pdev, PMSG_SUSPEND);
2735 }
2736
2737 /* ------------------ PCI Error Recovery infrastructure -------------- */
2738 /**
2739 * e100_io_error_detected - called when PCI error is detected.
2740 * @pdev: Pointer to PCI device
2741 * @state: The current pci connection state
2742 */
2743 static pci_ers_result_t e100_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2744 {
2745 struct net_device *netdev = pci_get_drvdata(pdev);
2746 struct nic *nic = netdev_priv(netdev);
2747
2748 /* Similar to calling e100_down(), but avoids adapter I/O. */
2749 e100_close(netdev);
2750
2751 /* Detach; put netif into a state similar to hotplug unplug. */
2752 napi_enable(&nic->napi);
2753 netif_device_detach(netdev);
2754 pci_disable_device(pdev);
2755
2756 /* Request a slot reset. */
2757 return PCI_ERS_RESULT_NEED_RESET;
2758 }
2759
2760 /**
2761 * e100_io_slot_reset - called after the pci bus has been reset.
2762 * @pdev: Pointer to PCI device
2763 *
2764 * Restart the card from scratch.
2765 */
2766 static pci_ers_result_t e100_io_slot_reset(struct pci_dev *pdev)
2767 {
2768 struct net_device *netdev = pci_get_drvdata(pdev);
2769 struct nic *nic = netdev_priv(netdev);
2770
2771 if (pci_enable_device(pdev)) {
2772 printk(KERN_ERR "e100: Cannot re-enable PCI device after reset.\n");
2773 return PCI_ERS_RESULT_DISCONNECT;
2774 }
2775 pci_set_master(pdev);
2776
2777 /* Only one device per card can do a reset */
2778 if (0 != PCI_FUNC(pdev->devfn))
2779 return PCI_ERS_RESULT_RECOVERED;
2780 e100_hw_reset(nic);
2781 e100_phy_init(nic);
2782
2783 return PCI_ERS_RESULT_RECOVERED;
2784 }
2785
2786 /**
2787 * e100_io_resume - resume normal operations
2788 * @pdev: Pointer to PCI device
2789 *
2790 * Resume normal operations after an error recovery
2791 * sequence has been completed.
2792 */
2793 static void e100_io_resume(struct pci_dev *pdev)
2794 {
2795 struct net_device *netdev = pci_get_drvdata(pdev);
2796 struct nic *nic = netdev_priv(netdev);
2797
2798 /* ack any pending wake events, disable PME */
2799 pci_enable_wake(pdev, 0, 0);
2800
2801 netif_device_attach(netdev);
2802 if (netif_running(netdev)) {
2803 e100_open(netdev);
2804 mod_timer(&nic->watchdog, jiffies);
2805 }
2806 }
2807
2808 static struct pci_error_handlers e100_err_handler = {
2809 .error_detected = e100_io_error_detected,
2810 .slot_reset = e100_io_slot_reset,
2811 .resume = e100_io_resume,
2812 };
2813
2814 static struct pci_driver e100_driver = {
2815 .name = DRV_NAME,
2816 .id_table = e100_id_table,
2817 .probe = e100_probe,
2818 .remove = __devexit_p(e100_remove),
2819 #ifdef CONFIG_PM
2820 /* Power Management hooks */
2821 .suspend = e100_suspend,
2822 .resume = e100_resume,
2823 #endif
2824 .shutdown = e100_shutdown,
2825 .err_handler = &e100_err_handler,
2826 };
2827
2828 static int __init e100_init_module(void)
2829 {
2830 if (((1 << debug) - 1) & NETIF_MSG_DRV) {
2831 printk(KERN_INFO PFX "%s, %s\n", DRV_DESCRIPTION, DRV_VERSION);
2832 printk(KERN_INFO PFX "%s\n", DRV_COPYRIGHT);
2833 }
2834 return pci_register_driver(&e100_driver);
2835 }
2836
2837 static void __exit e100_cleanup_module(void)
2838 {
2839 pci_unregister_driver(&e100_driver);
2840 }
2841
2842 module_init(e100_init_module);
2843 module_exit(e100_cleanup_module);
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