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ARM: PL08x: ensure loops use cpu_relax()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / e100.c
blobb0aa9e68990a70e783118ca78c39f969f56098d0
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 * 2009/06/01 - Andreas Mohr <andi at lisas dot de>
147 * - add clean lowlevel I/O emulation for cards with MII-lacking PHYs
148 */
149
150 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
151
152 #include <linux/module.h>
153 #include <linux/moduleparam.h>
154 #include <linux/kernel.h>
155 #include <linux/types.h>
156 #include <linux/sched.h>
157 #include <linux/slab.h>
158 #include <linux/delay.h>
159 #include <linux/init.h>
160 #include <linux/pci.h>
161 #include <linux/dma-mapping.h>
162 #include <linux/dmapool.h>
163 #include <linux/netdevice.h>
164 #include <linux/etherdevice.h>
165 #include <linux/mii.h>
166 #include <linux/if_vlan.h>
167 #include <linux/skbuff.h>
168 #include <linux/ethtool.h>
169 #include <linux/string.h>
170 #include <linux/firmware.h>
171 #include <linux/rtnetlink.h>
172 #include <asm/unaligned.h>
173
174
175 #define DRV_NAME "e100"
176 #define DRV_EXT "-NAPI"
177 #define DRV_VERSION "3.5.24-k2"DRV_EXT
178 #define DRV_DESCRIPTION "Intel(R) PRO/100 Network Driver"
179 #define DRV_COPYRIGHT "Copyright(c) 1999-2006 Intel Corporation"
180
181 #define E100_WATCHDOG_PERIOD (2 * HZ)
182 #define E100_NAPI_WEIGHT 16
183
184 #define FIRMWARE_D101M "e100/d101m_ucode.bin"
185 #define FIRMWARE_D101S "e100/d101s_ucode.bin"
186 #define FIRMWARE_D102E "e100/d102e_ucode.bin"
187
188 MODULE_DESCRIPTION(DRV_DESCRIPTION);
189 MODULE_AUTHOR(DRV_COPYRIGHT);
190 MODULE_LICENSE("GPL");
191 MODULE_VERSION(DRV_VERSION);
192 MODULE_FIRMWARE(FIRMWARE_D101M);
193 MODULE_FIRMWARE(FIRMWARE_D101S);
194 MODULE_FIRMWARE(FIRMWARE_D102E);
195
196 static int debug = 3;
197 static int eeprom_bad_csum_allow = 0;
198 static int use_io = 0;
199 module_param(debug, int, 0);
200 module_param(eeprom_bad_csum_allow, int, 0);
201 module_param(use_io, int, 0);
202 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
203 MODULE_PARM_DESC(eeprom_bad_csum_allow, "Allow bad eeprom checksums");
204 MODULE_PARM_DESC(use_io, "Force use of i/o access mode");
205
206 #define INTEL_8255X_ETHERNET_DEVICE(device_id, ich) {\
207 PCI_VENDOR_ID_INTEL, device_id, PCI_ANY_ID, PCI_ANY_ID, \
208 PCI_CLASS_NETWORK_ETHERNET << 8, 0xFFFF00, ich }
209 static DEFINE_PCI_DEVICE_TABLE(e100_id_table) = {
210 INTEL_8255X_ETHERNET_DEVICE(0x1029, 0),
211 INTEL_8255X_ETHERNET_DEVICE(0x1030, 0),
212 INTEL_8255X_ETHERNET_DEVICE(0x1031, 3),
213 INTEL_8255X_ETHERNET_DEVICE(0x1032, 3),
214 INTEL_8255X_ETHERNET_DEVICE(0x1033, 3),
215 INTEL_8255X_ETHERNET_DEVICE(0x1034, 3),
216 INTEL_8255X_ETHERNET_DEVICE(0x1038, 3),
217 INTEL_8255X_ETHERNET_DEVICE(0x1039, 4),
218 INTEL_8255X_ETHERNET_DEVICE(0x103A, 4),
219 INTEL_8255X_ETHERNET_DEVICE(0x103B, 4),
220 INTEL_8255X_ETHERNET_DEVICE(0x103C, 4),
221 INTEL_8255X_ETHERNET_DEVICE(0x103D, 4),
222 INTEL_8255X_ETHERNET_DEVICE(0x103E, 4),
223 INTEL_8255X_ETHERNET_DEVICE(0x1050, 5),
224 INTEL_8255X_ETHERNET_DEVICE(0x1051, 5),
225 INTEL_8255X_ETHERNET_DEVICE(0x1052, 5),
226 INTEL_8255X_ETHERNET_DEVICE(0x1053, 5),
227 INTEL_8255X_ETHERNET_DEVICE(0x1054, 5),
228 INTEL_8255X_ETHERNET_DEVICE(0x1055, 5),
229 INTEL_8255X_ETHERNET_DEVICE(0x1056, 5),
230 INTEL_8255X_ETHERNET_DEVICE(0x1057, 5),
231 INTEL_8255X_ETHERNET_DEVICE(0x1059, 0),
232 INTEL_8255X_ETHERNET_DEVICE(0x1064, 6),
233 INTEL_8255X_ETHERNET_DEVICE(0x1065, 6),
234 INTEL_8255X_ETHERNET_DEVICE(0x1066, 6),
235 INTEL_8255X_ETHERNET_DEVICE(0x1067, 6),
236 INTEL_8255X_ETHERNET_DEVICE(0x1068, 6),
237 INTEL_8255X_ETHERNET_DEVICE(0x1069, 6),
238 INTEL_8255X_ETHERNET_DEVICE(0x106A, 6),
239 INTEL_8255X_ETHERNET_DEVICE(0x106B, 6),
240 INTEL_8255X_ETHERNET_DEVICE(0x1091, 7),
241 INTEL_8255X_ETHERNET_DEVICE(0x1092, 7),
242 INTEL_8255X_ETHERNET_DEVICE(0x1093, 7),
243 INTEL_8255X_ETHERNET_DEVICE(0x1094, 7),
244 INTEL_8255X_ETHERNET_DEVICE(0x1095, 7),
245 INTEL_8255X_ETHERNET_DEVICE(0x10fe, 7),
246 INTEL_8255X_ETHERNET_DEVICE(0x1209, 0),
247 INTEL_8255X_ETHERNET_DEVICE(0x1229, 0),
248 INTEL_8255X_ETHERNET_DEVICE(0x2449, 2),
249 INTEL_8255X_ETHERNET_DEVICE(0x2459, 2),
250 INTEL_8255X_ETHERNET_DEVICE(0x245D, 2),
251 INTEL_8255X_ETHERNET_DEVICE(0x27DC, 7),
252 { 0, }
253 };
254 MODULE_DEVICE_TABLE(pci, e100_id_table);
255
256 enum mac {
257 mac_82557_D100_A = 0,
258 mac_82557_D100_B = 1,
259 mac_82557_D100_C = 2,
260 mac_82558_D101_A4 = 4,
261 mac_82558_D101_B0 = 5,
262 mac_82559_D101M = 8,
263 mac_82559_D101S = 9,
264 mac_82550_D102 = 12,
265 mac_82550_D102_C = 13,
266 mac_82551_E = 14,
267 mac_82551_F = 15,
268 mac_82551_10 = 16,
269 mac_unknown = 0xFF,
270 };
271
272 enum phy {
273 phy_100a = 0x000003E0,
274 phy_100c = 0x035002A8,
275 phy_82555_tx = 0x015002A8,
276 phy_nsc_tx = 0x5C002000,
277 phy_82562_et = 0x033002A8,
278 phy_82562_em = 0x032002A8,
279 phy_82562_ek = 0x031002A8,
280 phy_82562_eh = 0x017002A8,
281 phy_82552_v = 0xd061004d,
282 phy_unknown = 0xFFFFFFFF,
283 };
284
285 /* CSR (Control/Status Registers) */
286 struct csr {
287 struct {
288 u8 status;
289 u8 stat_ack;
290 u8 cmd_lo;
291 u8 cmd_hi;
292 u32 gen_ptr;
293 } scb;
294 u32 port;
295 u16 flash_ctrl;
296 u8 eeprom_ctrl_lo;
297 u8 eeprom_ctrl_hi;
298 u32 mdi_ctrl;
299 u32 rx_dma_count;
300 };
301
302 enum scb_status {
303 rus_no_res = 0x08,
304 rus_ready = 0x10,
305 rus_mask = 0x3C,
306 };
307
308 enum ru_state {
309 RU_SUSPENDED = 0,
310 RU_RUNNING = 1,
311 RU_UNINITIALIZED = -1,
312 };
313
314 enum scb_stat_ack {
315 stat_ack_not_ours = 0x00,
316 stat_ack_sw_gen = 0x04,
317 stat_ack_rnr = 0x10,
318 stat_ack_cu_idle = 0x20,
319 stat_ack_frame_rx = 0x40,
320 stat_ack_cu_cmd_done = 0x80,
321 stat_ack_not_present = 0xFF,
322 stat_ack_rx = (stat_ack_sw_gen | stat_ack_rnr | stat_ack_frame_rx),
323 stat_ack_tx = (stat_ack_cu_idle | stat_ack_cu_cmd_done),
324 };
325
326 enum scb_cmd_hi {
327 irq_mask_none = 0x00,
328 irq_mask_all = 0x01,
329 irq_sw_gen = 0x02,
330 };
331
332 enum scb_cmd_lo {
333 cuc_nop = 0x00,
334 ruc_start = 0x01,
335 ruc_load_base = 0x06,
336 cuc_start = 0x10,
337 cuc_resume = 0x20,
338 cuc_dump_addr = 0x40,
339 cuc_dump_stats = 0x50,
340 cuc_load_base = 0x60,
341 cuc_dump_reset = 0x70,
342 };
343
344 enum cuc_dump {
345 cuc_dump_complete = 0x0000A005,
346 cuc_dump_reset_complete = 0x0000A007,
347 };
348
349 enum port {
350 software_reset = 0x0000,
351 selftest = 0x0001,
352 selective_reset = 0x0002,
353 };
354
355 enum eeprom_ctrl_lo {
356 eesk = 0x01,
357 eecs = 0x02,
358 eedi = 0x04,
359 eedo = 0x08,
360 };
361
362 enum mdi_ctrl {
363 mdi_write = 0x04000000,
364 mdi_read = 0x08000000,
365 mdi_ready = 0x10000000,
366 };
367
368 enum eeprom_op {
369 op_write = 0x05,
370 op_read = 0x06,
371 op_ewds = 0x10,
372 op_ewen = 0x13,
373 };
374
375 enum eeprom_offsets {
376 eeprom_cnfg_mdix = 0x03,
377 eeprom_phy_iface = 0x06,
378 eeprom_id = 0x0A,
379 eeprom_config_asf = 0x0D,
380 eeprom_smbus_addr = 0x90,
381 };
382
383 enum eeprom_cnfg_mdix {
384 eeprom_mdix_enabled = 0x0080,
385 };
386
387 enum eeprom_phy_iface {
388 NoSuchPhy = 0,
389 I82553AB,
390 I82553C,
391 I82503,
392 DP83840,
393 S80C240,
394 S80C24,
395 I82555,
396 DP83840A = 10,
397 };
398
399 enum eeprom_id {
400 eeprom_id_wol = 0x0020,
401 };
402
403 enum eeprom_config_asf {
404 eeprom_asf = 0x8000,
405 eeprom_gcl = 0x4000,
406 };
407
408 enum cb_status {
409 cb_complete = 0x8000,
410 cb_ok = 0x2000,
411 };
412
413 enum cb_command {
414 cb_nop = 0x0000,
415 cb_iaaddr = 0x0001,
416 cb_config = 0x0002,
417 cb_multi = 0x0003,
418 cb_tx = 0x0004,
419 cb_ucode = 0x0005,
420 cb_dump = 0x0006,
421 cb_tx_sf = 0x0008,
422 cb_cid = 0x1f00,
423 cb_i = 0x2000,
424 cb_s = 0x4000,
425 cb_el = 0x8000,
426 };
427
428 struct rfd {
429 __le16 status;
430 __le16 command;
431 __le32 link;
432 __le32 rbd;
433 __le16 actual_size;
434 __le16 size;
435 };
436
437 struct rx {
438 struct rx *next, *prev;
439 struct sk_buff *skb;
440 dma_addr_t dma_addr;
441 };
442
443 #if defined(__BIG_ENDIAN_BITFIELD)
444 #define X(a,b) b,a
445 #else
446 #define X(a,b) a,b
447 #endif
448 struct config {
449 /*0*/ u8 X(byte_count:6, pad0:2);
450 /*1*/ u8 X(X(rx_fifo_limit:4, tx_fifo_limit:3), pad1:1);
451 /*2*/ u8 adaptive_ifs;
452 /*3*/ u8 X(X(X(X(mwi_enable:1, type_enable:1), read_align_enable:1),
453 term_write_cache_line:1), pad3:4);
454 /*4*/ u8 X(rx_dma_max_count:7, pad4:1);
455 /*5*/ u8 X(tx_dma_max_count:7, dma_max_count_enable:1);
456 /*6*/ u8 X(X(X(X(X(X(X(late_scb_update:1, direct_rx_dma:1),
457 tno_intr:1), cna_intr:1), standard_tcb:1), standard_stat_counter:1),
458 rx_discard_overruns:1), rx_save_bad_frames:1);
459 /*7*/ u8 X(X(X(X(X(rx_discard_short_frames:1, tx_underrun_retry:2),
460 pad7:2), rx_extended_rfd:1), tx_two_frames_in_fifo:1),
461 tx_dynamic_tbd:1);
462 /*8*/ u8 X(X(mii_mode:1, pad8:6), csma_disabled:1);
463 /*9*/ u8 X(X(X(X(X(rx_tcpudp_checksum:1, pad9:3), vlan_arp_tco:1),
464 link_status_wake:1), arp_wake:1), mcmatch_wake:1);
465 /*10*/ u8 X(X(X(pad10:3, no_source_addr_insertion:1), preamble_length:2),
466 loopback:2);
467 /*11*/ u8 X(linear_priority:3, pad11:5);
468 /*12*/ u8 X(X(linear_priority_mode:1, pad12:3), ifs:4);
469 /*13*/ u8 ip_addr_lo;
470 /*14*/ u8 ip_addr_hi;
471 /*15*/ u8 X(X(X(X(X(X(X(promiscuous_mode:1, broadcast_disabled:1),
472 wait_after_win:1), pad15_1:1), ignore_ul_bit:1), crc_16_bit:1),
473 pad15_2:1), crs_or_cdt:1);
474 /*16*/ u8 fc_delay_lo;
475 /*17*/ u8 fc_delay_hi;
476 /*18*/ u8 X(X(X(X(X(rx_stripping:1, tx_padding:1), rx_crc_transfer:1),
477 rx_long_ok:1), fc_priority_threshold:3), pad18:1);
478 /*19*/ u8 X(X(X(X(X(X(X(addr_wake:1, magic_packet_disable:1),
479 fc_disable:1), fc_restop:1), fc_restart:1), fc_reject:1),
480 full_duplex_force:1), full_duplex_pin:1);
481 /*20*/ u8 X(X(X(pad20_1:5, fc_priority_location:1), multi_ia:1), pad20_2:1);
482 /*21*/ u8 X(X(pad21_1:3, multicast_all:1), pad21_2:4);
483 /*22*/ u8 X(X(rx_d102_mode:1, rx_vlan_drop:1), pad22:6);
484 u8 pad_d102[9];
485 };
486
487 #define E100_MAX_MULTICAST_ADDRS 64
488 struct multi {
489 __le16 count;
490 u8 addr[E100_MAX_MULTICAST_ADDRS * ETH_ALEN + 2/*pad*/];
491 };
492
493 /* Important: keep total struct u32-aligned */
494 #define UCODE_SIZE 134
495 struct cb {
496 __le16 status;
497 __le16 command;
498 __le32 link;
499 union {
500 u8 iaaddr[ETH_ALEN];
501 __le32 ucode[UCODE_SIZE];
502 struct config config;
503 struct multi multi;
504 struct {
505 u32 tbd_array;
506 u16 tcb_byte_count;
507 u8 threshold;
508 u8 tbd_count;
509 struct {
510 __le32 buf_addr;
511 __le16 size;
512 u16 eol;
513 } tbd;
514 } tcb;
515 __le32 dump_buffer_addr;
516 } u;
517 struct cb *next, *prev;
518 dma_addr_t dma_addr;
519 struct sk_buff *skb;
520 };
521
522 enum loopback {
523 lb_none = 0, lb_mac = 1, lb_phy = 3,
524 };
525
526 struct stats {
527 __le32 tx_good_frames, tx_max_collisions, tx_late_collisions,
528 tx_underruns, tx_lost_crs, tx_deferred, tx_single_collisions,
529 tx_multiple_collisions, tx_total_collisions;
530 __le32 rx_good_frames, rx_crc_errors, rx_alignment_errors,
531 rx_resource_errors, rx_overrun_errors, rx_cdt_errors,
532 rx_short_frame_errors;
533 __le32 fc_xmt_pause, fc_rcv_pause, fc_rcv_unsupported;
534 __le16 xmt_tco_frames, rcv_tco_frames;
535 __le32 complete;
536 };
537
538 struct mem {
539 struct {
540 u32 signature;
541 u32 result;
542 } selftest;
543 struct stats stats;
544 u8 dump_buf[596];
545 };
546
547 struct param_range {
548 u32 min;
549 u32 max;
550 u32 count;
551 };
552
553 struct params {
554 struct param_range rfds;
555 struct param_range cbs;
556 };
557
558 struct nic {
559 /* Begin: frequently used values: keep adjacent for cache effect */
560 u32 msg_enable ____cacheline_aligned;
561 struct net_device *netdev;
562 struct pci_dev *pdev;
563 u16 (*mdio_ctrl)(struct nic *nic, u32 addr, u32 dir, u32 reg, u16 data);
564
565 struct rx *rxs ____cacheline_aligned;
566 struct rx *rx_to_use;
567 struct rx *rx_to_clean;
568 struct rfd blank_rfd;
569 enum ru_state ru_running;
570
571 spinlock_t cb_lock ____cacheline_aligned;
572 spinlock_t cmd_lock;
573 struct csr __iomem *csr;
574 enum scb_cmd_lo cuc_cmd;
575 unsigned int cbs_avail;
576 struct napi_struct napi;
577 struct cb *cbs;
578 struct cb *cb_to_use;
579 struct cb *cb_to_send;
580 struct cb *cb_to_clean;
581 __le16 tx_command;
582 /* End: frequently used values: keep adjacent for cache effect */
583
584 enum {
585 ich = (1 << 0),
586 promiscuous = (1 << 1),
587 multicast_all = (1 << 2),
588 wol_magic = (1 << 3),
589 ich_10h_workaround = (1 << 4),
590 } flags ____cacheline_aligned;
591
592 enum mac mac;
593 enum phy phy;
594 struct params params;
595 struct timer_list watchdog;
596 struct timer_list blink_timer;
597 struct mii_if_info mii;
598 struct work_struct tx_timeout_task;
599 enum loopback loopback;
600
601 struct mem *mem;
602 dma_addr_t dma_addr;
603
604 struct pci_pool *cbs_pool;
605 dma_addr_t cbs_dma_addr;
606 u8 adaptive_ifs;
607 u8 tx_threshold;
608 u32 tx_frames;
609 u32 tx_collisions;
610 u32 tx_deferred;
611 u32 tx_single_collisions;
612 u32 tx_multiple_collisions;
613 u32 tx_fc_pause;
614 u32 tx_tco_frames;
615
616 u32 rx_fc_pause;
617 u32 rx_fc_unsupported;
618 u32 rx_tco_frames;
619 u32 rx_over_length_errors;
620
621 u16 leds;
622 u16 eeprom_wc;
623 __le16 eeprom[256];
624 spinlock_t mdio_lock;
625 const struct firmware *fw;
626 };
627
628 static inline void e100_write_flush(struct nic *nic)
629 {
630 /* Flush previous PCI writes through intermediate bridges
631 * by doing a benign read */
632 (void)ioread8(&nic->csr->scb.status);
633 }
634
635 static void e100_enable_irq(struct nic *nic)
636 {
637 unsigned long flags;
638
639 spin_lock_irqsave(&nic->cmd_lock, flags);
640 iowrite8(irq_mask_none, &nic->csr->scb.cmd_hi);
641 e100_write_flush(nic);
642 spin_unlock_irqrestore(&nic->cmd_lock, flags);
643 }
644
645 static void e100_disable_irq(struct nic *nic)
646 {
647 unsigned long flags;
648
649 spin_lock_irqsave(&nic->cmd_lock, flags);
650 iowrite8(irq_mask_all, &nic->csr->scb.cmd_hi);
651 e100_write_flush(nic);
652 spin_unlock_irqrestore(&nic->cmd_lock, flags);
653 }
654
655 static void e100_hw_reset(struct nic *nic)
656 {
657 /* Put CU and RU into idle with a selective reset to get
658 * device off of PCI bus */
659 iowrite32(selective_reset, &nic->csr->port);
660 e100_write_flush(nic); udelay(20);
661
662 /* Now fully reset device */
663 iowrite32(software_reset, &nic->csr->port);
664 e100_write_flush(nic); udelay(20);
665
666 /* Mask off our interrupt line - it's unmasked after reset */
667 e100_disable_irq(nic);
668 }
669
670 static int e100_self_test(struct nic *nic)
671 {
672 u32 dma_addr = nic->dma_addr + offsetof(struct mem, selftest);
673
674 /* Passing the self-test is a pretty good indication
675 * that the device can DMA to/from host memory */
676
677 nic->mem->selftest.signature = 0;
678 nic->mem->selftest.result = 0xFFFFFFFF;
679
680 iowrite32(selftest | dma_addr, &nic->csr->port);
681 e100_write_flush(nic);
682 /* Wait 10 msec for self-test to complete */
683 msleep(10);
684
685 /* Interrupts are enabled after self-test */
686 e100_disable_irq(nic);
687
688 /* Check results of self-test */
689 if (nic->mem->selftest.result != 0) {
690 netif_err(nic, hw, nic->netdev,
691 "Self-test failed: result=0x%08X\n",
692 nic->mem->selftest.result);
693 return -ETIMEDOUT;
694 }
695 if (nic->mem->selftest.signature == 0) {
696 netif_err(nic, hw, nic->netdev, "Self-test failed: timed out\n");
697 return -ETIMEDOUT;
698 }
699
700 return 0;
701 }
702
703 static void e100_eeprom_write(struct nic *nic, u16 addr_len, u16 addr, __le16 data)
704 {
705 u32 cmd_addr_data[3];
706 u8 ctrl;
707 int i, j;
708
709 /* Three cmds: write/erase enable, write data, write/erase disable */
710 cmd_addr_data[0] = op_ewen << (addr_len - 2);
711 cmd_addr_data[1] = (((op_write << addr_len) | addr) << 16) |
712 le16_to_cpu(data);
713 cmd_addr_data[2] = op_ewds << (addr_len - 2);
714
715 /* Bit-bang cmds to write word to eeprom */
716 for (j = 0; j < 3; j++) {
717
718 /* Chip select */
719 iowrite8(eecs | eesk, &nic->csr->eeprom_ctrl_lo);
720 e100_write_flush(nic); udelay(4);
721
722 for (i = 31; i >= 0; i--) {
723 ctrl = (cmd_addr_data[j] & (1 << i)) ?
724 eecs | eedi : eecs;
725 iowrite8(ctrl, &nic->csr->eeprom_ctrl_lo);
726 e100_write_flush(nic); udelay(4);
727
728 iowrite8(ctrl | eesk, &nic->csr->eeprom_ctrl_lo);
729 e100_write_flush(nic); udelay(4);
730 }
731 /* Wait 10 msec for cmd to complete */
732 msleep(10);
733
734 /* Chip deselect */
735 iowrite8(0, &nic->csr->eeprom_ctrl_lo);
736 e100_write_flush(nic); udelay(4);
737 }
738 };
739
740 /* General technique stolen from the eepro100 driver - very clever */
741 static __le16 e100_eeprom_read(struct nic *nic, u16 *addr_len, u16 addr)
742 {
743 u32 cmd_addr_data;
744 u16 data = 0;
745 u8 ctrl;
746 int i;
747
748 cmd_addr_data = ((op_read << *addr_len) | addr) << 16;
749
750 /* Chip select */
751 iowrite8(eecs | eesk, &nic->csr->eeprom_ctrl_lo);
752 e100_write_flush(nic); udelay(4);
753
754 /* Bit-bang to read word from eeprom */
755 for (i = 31; i >= 0; i--) {
756 ctrl = (cmd_addr_data & (1 << i)) ? eecs | eedi : eecs;
757 iowrite8(ctrl, &nic->csr->eeprom_ctrl_lo);
758 e100_write_flush(nic); udelay(4);
759
760 iowrite8(ctrl | eesk, &nic->csr->eeprom_ctrl_lo);
761 e100_write_flush(nic); udelay(4);
762
763 /* Eeprom drives a dummy zero to EEDO after receiving
764 * complete address. Use this to adjust addr_len. */
765 ctrl = ioread8(&nic->csr->eeprom_ctrl_lo);
766 if (!(ctrl & eedo) && i > 16) {
767 *addr_len -= (i - 16);
768 i = 17;
769 }
770
771 data = (data << 1) | (ctrl & eedo ? 1 : 0);
772 }
773
774 /* Chip deselect */
775 iowrite8(0, &nic->csr->eeprom_ctrl_lo);
776 e100_write_flush(nic); udelay(4);
777
778 return cpu_to_le16(data);
779 };
780
781 /* Load entire EEPROM image into driver cache and validate checksum */
782 static int e100_eeprom_load(struct nic *nic)
783 {
784 u16 addr, addr_len = 8, checksum = 0;
785
786 /* Try reading with an 8-bit addr len to discover actual addr len */
787 e100_eeprom_read(nic, &addr_len, 0);
788 nic->eeprom_wc = 1 << addr_len;
789
790 for (addr = 0; addr < nic->eeprom_wc; addr++) {
791 nic->eeprom[addr] = e100_eeprom_read(nic, &addr_len, addr);
792 if (addr < nic->eeprom_wc - 1)
793 checksum += le16_to_cpu(nic->eeprom[addr]);
794 }
795
796 /* The checksum, stored in the last word, is calculated such that
797 * the sum of words should be 0xBABA */
798 if (cpu_to_le16(0xBABA - checksum) != nic->eeprom[nic->eeprom_wc - 1]) {
799 netif_err(nic, probe, nic->netdev, "EEPROM corrupted\n");
800 if (!eeprom_bad_csum_allow)
801 return -EAGAIN;
802 }
803
804 return 0;
805 }
806
807 /* Save (portion of) driver EEPROM cache to device and update checksum */
808 static int e100_eeprom_save(struct nic *nic, u16 start, u16 count)
809 {
810 u16 addr, addr_len = 8, checksum = 0;
811
812 /* Try reading with an 8-bit addr len to discover actual addr len */
813 e100_eeprom_read(nic, &addr_len, 0);
814 nic->eeprom_wc = 1 << addr_len;
815
816 if (start + count >= nic->eeprom_wc)
817 return -EINVAL;
818
819 for (addr = start; addr < start + count; addr++)
820 e100_eeprom_write(nic, addr_len, addr, nic->eeprom[addr]);
821
822 /* The checksum, stored in the last word, is calculated such that
823 * the sum of words should be 0xBABA */
824 for (addr = 0; addr < nic->eeprom_wc - 1; addr++)
825 checksum += le16_to_cpu(nic->eeprom[addr]);
826 nic->eeprom[nic->eeprom_wc - 1] = cpu_to_le16(0xBABA - checksum);
827 e100_eeprom_write(nic, addr_len, nic->eeprom_wc - 1,
828 nic->eeprom[nic->eeprom_wc - 1]);
829
830 return 0;
831 }
832
833 #define E100_WAIT_SCB_TIMEOUT 20000 /* we might have to wait 100ms!!! */
834 #define E100_WAIT_SCB_FAST 20 /* delay like the old code */
835 static int e100_exec_cmd(struct nic *nic, u8 cmd, dma_addr_t dma_addr)
836 {
837 unsigned long flags;
838 unsigned int i;
839 int err = 0;
840
841 spin_lock_irqsave(&nic->cmd_lock, flags);
842
843 /* Previous command is accepted when SCB clears */
844 for (i = 0; i < E100_WAIT_SCB_TIMEOUT; i++) {
845 if (likely(!ioread8(&nic->csr->scb.cmd_lo)))
846 break;
847 cpu_relax();
848 if (unlikely(i > E100_WAIT_SCB_FAST))
849 udelay(5);
850 }
851 if (unlikely(i == E100_WAIT_SCB_TIMEOUT)) {
852 err = -EAGAIN;
853 goto err_unlock;
854 }
855
856 if (unlikely(cmd != cuc_resume))
857 iowrite32(dma_addr, &nic->csr->scb.gen_ptr);
858 iowrite8(cmd, &nic->csr->scb.cmd_lo);
859
860 err_unlock:
861 spin_unlock_irqrestore(&nic->cmd_lock, flags);
862
863 return err;
864 }
865
866 static int e100_exec_cb(struct nic *nic, struct sk_buff *skb,
867 void (*cb_prepare)(struct nic *, struct cb *, struct sk_buff *))
868 {
869 struct cb *cb;
870 unsigned long flags;
871 int err = 0;
872
873 spin_lock_irqsave(&nic->cb_lock, flags);
874
875 if (unlikely(!nic->cbs_avail)) {
876 err = -ENOMEM;
877 goto err_unlock;
878 }
879
880 cb = nic->cb_to_use;
881 nic->cb_to_use = cb->next;
882 nic->cbs_avail--;
883 cb->skb = skb;
884
885 if (unlikely(!nic->cbs_avail))
886 err = -ENOSPC;
887
888 cb_prepare(nic, cb, skb);
889
890 /* Order is important otherwise we'll be in a race with h/w:
891 * set S-bit in current first, then clear S-bit in previous. */
892 cb->command |= cpu_to_le16(cb_s);
893 wmb();
894 cb->prev->command &= cpu_to_le16(~cb_s);
895
896 while (nic->cb_to_send != nic->cb_to_use) {
897 if (unlikely(e100_exec_cmd(nic, nic->cuc_cmd,
898 nic->cb_to_send->dma_addr))) {
899 /* Ok, here's where things get sticky. It's
900 * possible that we can't schedule the command
901 * because the controller is too busy, so
902 * let's just queue the command and try again
903 * when another command is scheduled. */
904 if (err == -ENOSPC) {
905 //request a reset
906 schedule_work(&nic->tx_timeout_task);
907 }
908 break;
909 } else {
910 nic->cuc_cmd = cuc_resume;
911 nic->cb_to_send = nic->cb_to_send->next;
912 }
913 }
914
915 err_unlock:
916 spin_unlock_irqrestore(&nic->cb_lock, flags);
917
918 return err;
919 }
920
921 static int mdio_read(struct net_device *netdev, int addr, int reg)
922 {
923 struct nic *nic = netdev_priv(netdev);
924 return nic->mdio_ctrl(nic, addr, mdi_read, reg, 0);
925 }
926
927 static void mdio_write(struct net_device *netdev, int addr, int reg, int data)
928 {
929 struct nic *nic = netdev_priv(netdev);
930
931 nic->mdio_ctrl(nic, addr, mdi_write, reg, data);
932 }
933
934 /* the standard mdio_ctrl() function for usual MII-compliant hardware */
935 static u16 mdio_ctrl_hw(struct nic *nic, u32 addr, u32 dir, u32 reg, u16 data)
936 {
937 u32 data_out = 0;
938 unsigned int i;
939 unsigned long flags;
940
941
942 /*
943 * Stratus87247: we shouldn't be writing the MDI control
944 * register until the Ready bit shows True. Also, since
945 * manipulation of the MDI control registers is a multi-step
946 * procedure it should be done under lock.
947 */
948 spin_lock_irqsave(&nic->mdio_lock, flags);
949 for (i = 100; i; --i) {
950 if (ioread32(&nic->csr->mdi_ctrl) & mdi_ready)
951 break;
952 udelay(20);
953 }
954 if (unlikely(!i)) {
955 netdev_err(nic->netdev, "e100.mdio_ctrl won't go Ready\n");
956 spin_unlock_irqrestore(&nic->mdio_lock, flags);
957 return 0; /* No way to indicate timeout error */
958 }
959 iowrite32((reg << 16) | (addr << 21) | dir | data, &nic->csr->mdi_ctrl);
960
961 for (i = 0; i < 100; i++) {
962 udelay(20);
963 if ((data_out = ioread32(&nic->csr->mdi_ctrl)) & mdi_ready)
964 break;
965 }
966 spin_unlock_irqrestore(&nic->mdio_lock, flags);
967 netif_printk(nic, hw, KERN_DEBUG, nic->netdev,
968 "%s:addr=%d, reg=%d, data_in=0x%04X, data_out=0x%04X\n",
969 dir == mdi_read ? "READ" : "WRITE",
970 addr, reg, data, data_out);
971 return (u16)data_out;
972 }
973
974 /* slightly tweaked mdio_ctrl() function for phy_82552_v specifics */
975 static u16 mdio_ctrl_phy_82552_v(struct nic *nic,
976 u32 addr,
977 u32 dir,
978 u32 reg,
979 u16 data)
980 {
981 if ((reg == MII_BMCR) && (dir == mdi_write)) {
982 if (data & (BMCR_ANRESTART | BMCR_ANENABLE)) {
983 u16 advert = mdio_read(nic->netdev, nic->mii.phy_id,
984 MII_ADVERTISE);
985
986 /*
987 * Workaround Si issue where sometimes the part will not
988 * autoneg to 100Mbps even when advertised.
989 */
990 if (advert & ADVERTISE_100FULL)
991 data |= BMCR_SPEED100 | BMCR_FULLDPLX;
992 else if (advert & ADVERTISE_100HALF)
993 data |= BMCR_SPEED100;
994 }
995 }
996 return mdio_ctrl_hw(nic, addr, dir, reg, data);
997 }
998
999 /* Fully software-emulated mdio_ctrl() function for cards without
1000 * MII-compliant PHYs.
1001 * For now, this is mainly geared towards 80c24 support; in case of further
1002 * requirements for other types (i82503, ...?) either extend this mechanism
1003 * or split it, whichever is cleaner.
1004 */
1005 static u16 mdio_ctrl_phy_mii_emulated(struct nic *nic,
1006 u32 addr,
1007 u32 dir,
1008 u32 reg,
1009 u16 data)
1010 {
1011 /* might need to allocate a netdev_priv'ed register array eventually
1012 * to be able to record state changes, but for now
1013 * some fully hardcoded register handling ought to be ok I guess. */
1014
1015 if (dir == mdi_read) {
1016 switch (reg) {
1017 case MII_BMCR:
1018 /* Auto-negotiation, right? */
1019 return BMCR_ANENABLE |
1020 BMCR_FULLDPLX;
1021 case MII_BMSR:
1022 return BMSR_LSTATUS /* for mii_link_ok() */ |
1023 BMSR_ANEGCAPABLE |
1024 BMSR_10FULL;
1025 case MII_ADVERTISE:
1026 /* 80c24 is a "combo card" PHY, right? */
1027 return ADVERTISE_10HALF |
1028 ADVERTISE_10FULL;
1029 default:
1030 netif_printk(nic, hw, KERN_DEBUG, nic->netdev,
1031 "%s:addr=%d, reg=%d, data=0x%04X: unimplemented emulation!\n",
1032 dir == mdi_read ? "READ" : "WRITE",
1033 addr, reg, data);
1034 return 0xFFFF;
1035 }
1036 } else {
1037 switch (reg) {
1038 default:
1039 netif_printk(nic, hw, KERN_DEBUG, nic->netdev,
1040 "%s:addr=%d, reg=%d, data=0x%04X: unimplemented emulation!\n",
1041 dir == mdi_read ? "READ" : "WRITE",
1042 addr, reg, data);
1043 return 0xFFFF;
1044 }
1045 }
1046 }
1047 static inline int e100_phy_supports_mii(struct nic *nic)
1048 {
1049 /* for now, just check it by comparing whether we
1050 are using MII software emulation.
1051 */
1052 return (nic->mdio_ctrl != mdio_ctrl_phy_mii_emulated);
1053 }
1054
1055 static void e100_get_defaults(struct nic *nic)
1056 {
1057 struct param_range rfds = { .min = 16, .max = 256, .count = 256 };
1058 struct param_range cbs = { .min = 64, .max = 256, .count = 128 };
1059
1060 /* MAC type is encoded as rev ID; exception: ICH is treated as 82559 */
1061 nic->mac = (nic->flags & ich) ? mac_82559_D101M : nic->pdev->revision;
1062 if (nic->mac == mac_unknown)
1063 nic->mac = mac_82557_D100_A;
1064
1065 nic->params.rfds = rfds;
1066 nic->params.cbs = cbs;
1067
1068 /* Quadwords to DMA into FIFO before starting frame transmit */
1069 nic->tx_threshold = 0xE0;
1070
1071 /* no interrupt for every tx completion, delay = 256us if not 557 */
1072 nic->tx_command = cpu_to_le16(cb_tx | cb_tx_sf |
1073 ((nic->mac >= mac_82558_D101_A4) ? cb_cid : cb_i));
1074
1075 /* Template for a freshly allocated RFD */
1076 nic->blank_rfd.command = 0;
1077 nic->blank_rfd.rbd = cpu_to_le32(0xFFFFFFFF);
1078 nic->blank_rfd.size = cpu_to_le16(VLAN_ETH_FRAME_LEN);
1079
1080 /* MII setup */
1081 nic->mii.phy_id_mask = 0x1F;
1082 nic->mii.reg_num_mask = 0x1F;
1083 nic->mii.dev = nic->netdev;
1084 nic->mii.mdio_read = mdio_read;
1085 nic->mii.mdio_write = mdio_write;
1086 }
1087
1088 static void e100_configure(struct nic *nic, struct cb *cb, struct sk_buff *skb)
1089 {
1090 struct config *config = &cb->u.config;
1091 u8 *c = (u8 *)config;
1092
1093 cb->command = cpu_to_le16(cb_config);
1094
1095 memset(config, 0, sizeof(struct config));
1096
1097 config->byte_count = 0x16; /* bytes in this struct */
1098 config->rx_fifo_limit = 0x8; /* bytes in FIFO before DMA */
1099 config->direct_rx_dma = 0x1; /* reserved */
1100 config->standard_tcb = 0x1; /* 1=standard, 0=extended */
1101 config->standard_stat_counter = 0x1; /* 1=standard, 0=extended */
1102 config->rx_discard_short_frames = 0x1; /* 1=discard, 0=pass */
1103 config->tx_underrun_retry = 0x3; /* # of underrun retries */
1104 if (e100_phy_supports_mii(nic))
1105 config->mii_mode = 1; /* 1=MII mode, 0=i82503 mode */
1106 config->pad10 = 0x6;
1107 config->no_source_addr_insertion = 0x1; /* 1=no, 0=yes */
1108 config->preamble_length = 0x2; /* 0=1, 1=3, 2=7, 3=15 bytes */
1109 config->ifs = 0x6; /* x16 = inter frame spacing */
1110 config->ip_addr_hi = 0xF2; /* ARP IP filter - not used */
1111 config->pad15_1 = 0x1;
1112 config->pad15_2 = 0x1;
1113 config->crs_or_cdt = 0x0; /* 0=CRS only, 1=CRS or CDT */
1114 config->fc_delay_hi = 0x40; /* time delay for fc frame */
1115 config->tx_padding = 0x1; /* 1=pad short frames */
1116 config->fc_priority_threshold = 0x7; /* 7=priority fc disabled */
1117 config->pad18 = 0x1;
1118 config->full_duplex_pin = 0x1; /* 1=examine FDX# pin */
1119 config->pad20_1 = 0x1F;
1120 config->fc_priority_location = 0x1; /* 1=byte#31, 0=byte#19 */
1121 config->pad21_1 = 0x5;
1122
1123 config->adaptive_ifs = nic->adaptive_ifs;
1124 config->loopback = nic->loopback;
1125
1126 if (nic->mii.force_media && nic->mii.full_duplex)
1127 config->full_duplex_force = 0x1; /* 1=force, 0=auto */
1128
1129 if (nic->flags & promiscuous || nic->loopback) {
1130 config->rx_save_bad_frames = 0x1; /* 1=save, 0=discard */
1131 config->rx_discard_short_frames = 0x0; /* 1=discard, 0=save */
1132 config->promiscuous_mode = 0x1; /* 1=on, 0=off */
1133 }
1134
1135 if (nic->flags & multicast_all)
1136 config->multicast_all = 0x1; /* 1=accept, 0=no */
1137
1138 /* disable WoL when up */
1139 if (netif_running(nic->netdev) || !(nic->flags & wol_magic))
1140 config->magic_packet_disable = 0x1; /* 1=off, 0=on */
1141
1142 if (nic->mac >= mac_82558_D101_A4) {
1143 config->fc_disable = 0x1; /* 1=Tx fc off, 0=Tx fc on */
1144 config->mwi_enable = 0x1; /* 1=enable, 0=disable */
1145 config->standard_tcb = 0x0; /* 1=standard, 0=extended */
1146 config->rx_long_ok = 0x1; /* 1=VLANs ok, 0=standard */
1147 if (nic->mac >= mac_82559_D101M) {
1148 config->tno_intr = 0x1; /* TCO stats enable */
1149 /* Enable TCO in extended config */
1150 if (nic->mac >= mac_82551_10) {
1151 config->byte_count = 0x20; /* extended bytes */
1152 config->rx_d102_mode = 0x1; /* GMRC for TCO */
1153 }
1154 } else {
1155 config->standard_stat_counter = 0x0;
1156 }
1157 }
1158
1159 netif_printk(nic, hw, KERN_DEBUG, nic->netdev,
1160 "[00-07]=%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
1161 c[0], c[1], c[2], c[3], c[4], c[5], c[6], c[7]);
1162 netif_printk(nic, hw, KERN_DEBUG, nic->netdev,
1163 "[08-15]=%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
1164 c[8], c[9], c[10], c[11], c[12], c[13], c[14], c[15]);
1165 netif_printk(nic, hw, KERN_DEBUG, nic->netdev,
1166 "[16-23]=%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
1167 c[16], c[17], c[18], c[19], c[20], c[21], c[22], c[23]);
1168 }
1169
1170 /*************************************************************************
1171 * CPUSaver parameters
1172 *
1173 * All CPUSaver parameters are 16-bit literals that are part of a
1174 * "move immediate value" instruction. By changing the value of
1175 * the literal in the instruction before the code is loaded, the
1176 * driver can change the algorithm.
1177 *
1178 * INTDELAY - This loads the dead-man timer with its initial value.
1179 * When this timer expires the interrupt is asserted, and the
1180 * timer is reset each time a new packet is received. (see
1181 * BUNDLEMAX below to set the limit on number of chained packets)
1182 * The current default is 0x600 or 1536. Experiments show that
1183 * the value should probably stay within the 0x200 - 0x1000.
1184 *
1185 * BUNDLEMAX -
1186 * This sets the maximum number of frames that will be bundled. In
1187 * some situations, such as the TCP windowing algorithm, it may be
1188 * better to limit the growth of the bundle size than let it go as
1189 * high as it can, because that could cause too much added latency.
1190 * The default is six, because this is the number of packets in the
1191 * default TCP window size. A value of 1 would make CPUSaver indicate
1192 * an interrupt for every frame received. If you do not want to put
1193 * a limit on the bundle size, set this value to xFFFF.
1194 *
1195 * BUNDLESMALL -
1196 * This contains a bit-mask describing the minimum size frame that
1197 * will be bundled. The default masks the lower 7 bits, which means
1198 * that any frame less than 128 bytes in length will not be bundled,
1199 * but will instead immediately generate an interrupt. This does
1200 * not affect the current bundle in any way. Any frame that is 128
1201 * bytes or large will be bundled normally. This feature is meant
1202 * to provide immediate indication of ACK frames in a TCP environment.
1203 * Customers were seeing poor performance when a machine with CPUSaver
1204 * enabled was sending but not receiving. The delay introduced when
1205 * the ACKs were received was enough to reduce total throughput, because
1206 * the sender would sit idle until the ACK was finally seen.
1207 *
1208 * The current default is 0xFF80, which masks out the lower 7 bits.
1209 * This means that any frame which is x7F (127) bytes or smaller
1210 * will cause an immediate interrupt. Because this value must be a
1211 * bit mask, there are only a few valid values that can be used. To
1212 * turn this feature off, the driver can write the value xFFFF to the
1213 * lower word of this instruction (in the same way that the other
1214 * parameters are used). Likewise, a value of 0xF800 (2047) would
1215 * cause an interrupt to be generated for every frame, because all
1216 * standard Ethernet frames are <= 2047 bytes in length.
1217 *************************************************************************/
1218
1219 /* if you wish to disable the ucode functionality, while maintaining the
1220 * workarounds it provides, set the following defines to:
1221 * BUNDLESMALL 0
1222 * BUNDLEMAX 1
1223 * INTDELAY 1
1224 */
1225 #define BUNDLESMALL 1
1226 #define BUNDLEMAX (u16)6
1227 #define INTDELAY (u16)1536 /* 0x600 */
1228
1229 /* Initialize firmware */
1230 static const struct firmware *e100_request_firmware(struct nic *nic)
1231 {
1232 const char *fw_name;
1233 const struct firmware *fw = nic->fw;
1234 u8 timer, bundle, min_size;
1235 int err = 0;
1236
1237 /* do not load u-code for ICH devices */
1238 if (nic->flags & ich)
1239 return NULL;
1240
1241 /* Search for ucode match against h/w revision */
1242 if (nic->mac == mac_82559_D101M)
1243 fw_name = FIRMWARE_D101M;
1244 else if (nic->mac == mac_82559_D101S)
1245 fw_name = FIRMWARE_D101S;
1246 else if (nic->mac == mac_82551_F || nic->mac == mac_82551_10)
1247 fw_name = FIRMWARE_D102E;
1248 else /* No ucode on other devices */
1249 return NULL;
1250
1251 /* If the firmware has not previously been loaded, request a pointer
1252 * to it. If it was previously loaded, we are reinitializing the
1253 * adapter, possibly in a resume from hibernate, in which case
1254 * request_firmware() cannot be used.
1255 */
1256 if (!fw)
1257 err = request_firmware(&fw, fw_name, &nic->pdev->dev);
1258
1259 if (err) {
1260 netif_err(nic, probe, nic->netdev,
1261 "Failed to load firmware \"%s\": %d\n",
1262 fw_name, err);
1263 return ERR_PTR(err);
1264 }
1265
1266 /* Firmware should be precisely UCODE_SIZE (words) plus three bytes
1267 indicating the offsets for BUNDLESMALL, BUNDLEMAX, INTDELAY */
1268 if (fw->size != UCODE_SIZE * 4 + 3) {
1269 netif_err(nic, probe, nic->netdev,
1270 "Firmware \"%s\" has wrong size %zu\n",
1271 fw_name, fw->size);
1272 release_firmware(fw);
1273 return ERR_PTR(-EINVAL);
1274 }
1275
1276 /* Read timer, bundle and min_size from end of firmware blob */
1277 timer = fw->data[UCODE_SIZE * 4];
1278 bundle = fw->data[UCODE_SIZE * 4 + 1];
1279 min_size = fw->data[UCODE_SIZE * 4 + 2];
1280
1281 if (timer >= UCODE_SIZE || bundle >= UCODE_SIZE ||
1282 min_size >= UCODE_SIZE) {
1283 netif_err(nic, probe, nic->netdev,
1284 "\"%s\" has bogus offset values (0x%x,0x%x,0x%x)\n",
1285 fw_name, timer, bundle, min_size);
1286 release_firmware(fw);
1287 return ERR_PTR(-EINVAL);
1288 }
1289
1290 /* OK, firmware is validated and ready to use. Save a pointer
1291 * to it in the nic */
1292 nic->fw = fw;
1293 return fw;
1294 }
1295
1296 static void e100_setup_ucode(struct nic *nic, struct cb *cb,
1297 struct sk_buff *skb)
1298 {
1299 const struct firmware *fw = (void *)skb;
1300 u8 timer, bundle, min_size;
1301
1302 /* It's not a real skb; we just abused the fact that e100_exec_cb
1303 will pass it through to here... */
1304 cb->skb = NULL;
1305
1306 /* firmware is stored as little endian already */
1307 memcpy(cb->u.ucode, fw->data, UCODE_SIZE * 4);
1308
1309 /* Read timer, bundle and min_size from end of firmware blob */
1310 timer = fw->data[UCODE_SIZE * 4];
1311 bundle = fw->data[UCODE_SIZE * 4 + 1];
1312 min_size = fw->data[UCODE_SIZE * 4 + 2];
1313
1314 /* Insert user-tunable settings in cb->u.ucode */
1315 cb->u.ucode[timer] &= cpu_to_le32(0xFFFF0000);
1316 cb->u.ucode[timer] |= cpu_to_le32(INTDELAY);
1317 cb->u.ucode[bundle] &= cpu_to_le32(0xFFFF0000);
1318 cb->u.ucode[bundle] |= cpu_to_le32(BUNDLEMAX);
1319 cb->u.ucode[min_size] &= cpu_to_le32(0xFFFF0000);
1320 cb->u.ucode[min_size] |= cpu_to_le32((BUNDLESMALL) ? 0xFFFF : 0xFF80);
1321
1322 cb->command = cpu_to_le16(cb_ucode | cb_el);
1323 }
1324
1325 static inline int e100_load_ucode_wait(struct nic *nic)
1326 {
1327 const struct firmware *fw;
1328 int err = 0, counter = 50;
1329 struct cb *cb = nic->cb_to_clean;
1330
1331 fw = e100_request_firmware(nic);
1332 /* If it's NULL, then no ucode is required */
1333 if (!fw || IS_ERR(fw))
1334 return PTR_ERR(fw);
1335
1336 if ((err = e100_exec_cb(nic, (void *)fw, e100_setup_ucode)))
1337 netif_err(nic, probe, nic->netdev,
1338 "ucode cmd failed with error %d\n", err);
1339
1340 /* must restart cuc */
1341 nic->cuc_cmd = cuc_start;
1342
1343 /* wait for completion */
1344 e100_write_flush(nic);
1345 udelay(10);
1346
1347 /* wait for possibly (ouch) 500ms */
1348 while (!(cb->status & cpu_to_le16(cb_complete))) {
1349 msleep(10);
1350 if (!--counter) break;
1351 }
1352
1353 /* ack any interrupts, something could have been set */
1354 iowrite8(~0, &nic->csr->scb.stat_ack);
1355
1356 /* if the command failed, or is not OK, notify and return */
1357 if (!counter || !(cb->status & cpu_to_le16(cb_ok))) {
1358 netif_err(nic, probe, nic->netdev, "ucode load failed\n");
1359 err = -EPERM;
1360 }
1361
1362 return err;
1363 }
1364
1365 static void e100_setup_iaaddr(struct nic *nic, struct cb *cb,
1366 struct sk_buff *skb)
1367 {
1368 cb->command = cpu_to_le16(cb_iaaddr);
1369 memcpy(cb->u.iaaddr, nic->netdev->dev_addr, ETH_ALEN);
1370 }
1371
1372 static void e100_dump(struct nic *nic, struct cb *cb, struct sk_buff *skb)
1373 {
1374 cb->command = cpu_to_le16(cb_dump);
1375 cb->u.dump_buffer_addr = cpu_to_le32(nic->dma_addr +
1376 offsetof(struct mem, dump_buf));
1377 }
1378
1379 static int e100_phy_check_without_mii(struct nic *nic)
1380 {
1381 u8 phy_type;
1382 int without_mii;
1383
1384 phy_type = (nic->eeprom[eeprom_phy_iface] >> 8) & 0x0f;
1385
1386 switch (phy_type) {
1387 case NoSuchPhy: /* Non-MII PHY; UNTESTED! */
1388 case I82503: /* Non-MII PHY; UNTESTED! */
1389 case S80C24: /* Non-MII PHY; tested and working */
1390 /* paragraph from the FreeBSD driver, "FXP_PHY_80C24":
1391 * The Seeq 80c24 AutoDUPLEX(tm) Ethernet Interface Adapter
1392 * doesn't have a programming interface of any sort. The
1393 * media is sensed automatically based on how the link partner
1394 * is configured. This is, in essence, manual configuration.
1395 */
1396 netif_info(nic, probe, nic->netdev,
1397 "found MII-less i82503 or 80c24 or other PHY\n");
1398
1399 nic->mdio_ctrl = mdio_ctrl_phy_mii_emulated;
1400 nic->mii.phy_id = 0; /* is this ok for an MII-less PHY? */
1401
1402 /* these might be needed for certain MII-less cards...
1403 * nic->flags |= ich;
1404 * nic->flags |= ich_10h_workaround; */
1405
1406 without_mii = 1;
1407 break;
1408 default:
1409 without_mii = 0;
1410 break;
1411 }
1412 return without_mii;
1413 }
1414
1415 #define NCONFIG_AUTO_SWITCH 0x0080
1416 #define MII_NSC_CONG MII_RESV1
1417 #define NSC_CONG_ENABLE 0x0100
1418 #define NSC_CONG_TXREADY 0x0400
1419 #define ADVERTISE_FC_SUPPORTED 0x0400
1420 static int e100_phy_init(struct nic *nic)
1421 {
1422 struct net_device *netdev = nic->netdev;
1423 u32 addr;
1424 u16 bmcr, stat, id_lo, id_hi, cong;
1425
1426 /* Discover phy addr by searching addrs in order {1,0,2,..., 31} */
1427 for (addr = 0; addr < 32; addr++) {
1428 nic->mii.phy_id = (addr == 0) ? 1 : (addr == 1) ? 0 : addr;
1429 bmcr = mdio_read(netdev, nic->mii.phy_id, MII_BMCR);
1430 stat = mdio_read(netdev, nic->mii.phy_id, MII_BMSR);
1431 stat = mdio_read(netdev, nic->mii.phy_id, MII_BMSR);
1432 if (!((bmcr == 0xFFFF) || ((stat == 0) && (bmcr == 0))))
1433 break;
1434 }
1435 if (addr == 32) {
1436 /* uhoh, no PHY detected: check whether we seem to be some
1437 * weird, rare variant which is *known* to not have any MII.
1438 * But do this AFTER MII checking only, since this does
1439 * lookup of EEPROM values which may easily be unreliable. */
1440 if (e100_phy_check_without_mii(nic))
1441 return 0; /* simply return and hope for the best */
1442 else {
1443 /* for unknown cases log a fatal error */
1444 netif_err(nic, hw, nic->netdev,
1445 "Failed to locate any known PHY, aborting\n");
1446 return -EAGAIN;
1447 }
1448 } else
1449 netif_printk(nic, hw, KERN_DEBUG, nic->netdev,
1450 "phy_addr = %d\n", nic->mii.phy_id);
1451
1452 /* Get phy ID */
1453 id_lo = mdio_read(netdev, nic->mii.phy_id, MII_PHYSID1);
1454 id_hi = mdio_read(netdev, nic->mii.phy_id, MII_PHYSID2);
1455 nic->phy = (u32)id_hi << 16 | (u32)id_lo;
1456 netif_printk(nic, hw, KERN_DEBUG, nic->netdev,
1457 "phy ID = 0x%08X\n", nic->phy);
1458
1459 /* Select the phy and isolate the rest */
1460 for (addr = 0; addr < 32; addr++) {
1461 if (addr != nic->mii.phy_id) {
1462 mdio_write(netdev, addr, MII_BMCR, BMCR_ISOLATE);
1463 } else if (nic->phy != phy_82552_v) {
1464 bmcr = mdio_read(netdev, addr, MII_BMCR);
1465 mdio_write(netdev, addr, MII_BMCR,
1466 bmcr & ~BMCR_ISOLATE);
1467 }
1468 }
1469 /*
1470 * Workaround for 82552:
1471 * Clear the ISOLATE bit on selected phy_id last (mirrored on all
1472 * other phy_id's) using bmcr value from addr discovery loop above.
1473 */
1474 if (nic->phy == phy_82552_v)
1475 mdio_write(netdev, nic->mii.phy_id, MII_BMCR,
1476 bmcr & ~BMCR_ISOLATE);
1477
1478 /* Handle National tx phys */
1479 #define NCS_PHY_MODEL_MASK 0xFFF0FFFF
1480 if ((nic->phy & NCS_PHY_MODEL_MASK) == phy_nsc_tx) {
1481 /* Disable congestion control */
1482 cong = mdio_read(netdev, nic->mii.phy_id, MII_NSC_CONG);
1483 cong |= NSC_CONG_TXREADY;
1484 cong &= ~NSC_CONG_ENABLE;
1485 mdio_write(netdev, nic->mii.phy_id, MII_NSC_CONG, cong);
1486 }
1487
1488 if (nic->phy == phy_82552_v) {
1489 u16 advert = mdio_read(netdev, nic->mii.phy_id, MII_ADVERTISE);
1490
1491 /* assign special tweaked mdio_ctrl() function */
1492 nic->mdio_ctrl = mdio_ctrl_phy_82552_v;
1493
1494 /* Workaround Si not advertising flow-control during autoneg */
1495 advert |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
1496 mdio_write(netdev, nic->mii.phy_id, MII_ADVERTISE, advert);
1497
1498 /* Reset for the above changes to take effect */
1499 bmcr = mdio_read(netdev, nic->mii.phy_id, MII_BMCR);
1500 bmcr |= BMCR_RESET;
1501 mdio_write(netdev, nic->mii.phy_id, MII_BMCR, bmcr);
1502 } else if ((nic->mac >= mac_82550_D102) || ((nic->flags & ich) &&
1503 (mdio_read(netdev, nic->mii.phy_id, MII_TPISTATUS) & 0x8000) &&
1504 !(nic->eeprom[eeprom_cnfg_mdix] & eeprom_mdix_enabled))) {
1505 /* enable/disable MDI/MDI-X auto-switching. */
1506 mdio_write(netdev, nic->mii.phy_id, MII_NCONFIG,
1507 nic->mii.force_media ? 0 : NCONFIG_AUTO_SWITCH);
1508 }
1509
1510 return 0;
1511 }
1512
1513 static int e100_hw_init(struct nic *nic)
1514 {
1515 int err;
1516
1517 e100_hw_reset(nic);
1518
1519 netif_err(nic, hw, nic->netdev, "e100_hw_init\n");
1520 if (!in_interrupt() && (err = e100_self_test(nic)))
1521 return err;
1522
1523 if ((err = e100_phy_init(nic)))
1524 return err;
1525 if ((err = e100_exec_cmd(nic, cuc_load_base, 0)))
1526 return err;
1527 if ((err = e100_exec_cmd(nic, ruc_load_base, 0)))
1528 return err;
1529 if ((err = e100_load_ucode_wait(nic)))
1530 return err;
1531 if ((err = e100_exec_cb(nic, NULL, e100_configure)))
1532 return err;
1533 if ((err = e100_exec_cb(nic, NULL, e100_setup_iaaddr)))
1534 return err;
1535 if ((err = e100_exec_cmd(nic, cuc_dump_addr,
1536 nic->dma_addr + offsetof(struct mem, stats))))
1537 return err;
1538 if ((err = e100_exec_cmd(nic, cuc_dump_reset, 0)))
1539 return err;
1540
1541 e100_disable_irq(nic);
1542
1543 return 0;
1544 }
1545
1546 static void e100_multi(struct nic *nic, struct cb *cb, struct sk_buff *skb)
1547 {
1548 struct net_device *netdev = nic->netdev;
1549 struct netdev_hw_addr *ha;
1550 u16 i, count = min(netdev_mc_count(netdev), E100_MAX_MULTICAST_ADDRS);
1551
1552 cb->command = cpu_to_le16(cb_multi);
1553 cb->u.multi.count = cpu_to_le16(count * ETH_ALEN);
1554 i = 0;
1555 netdev_for_each_mc_addr(ha, netdev) {
1556 if (i == count)
1557 break;
1558 memcpy(&cb->u.multi.addr[i++ * ETH_ALEN], &ha->addr,
1559 ETH_ALEN);
1560 }
1561 }
1562
1563 static void e100_set_multicast_list(struct net_device *netdev)
1564 {
1565 struct nic *nic = netdev_priv(netdev);
1566
1567 netif_printk(nic, hw, KERN_DEBUG, nic->netdev,
1568 "mc_count=%d, flags=0x%04X\n",
1569 netdev_mc_count(netdev), netdev->flags);
1570
1571 if (netdev->flags & IFF_PROMISC)
1572 nic->flags |= promiscuous;
1573 else
1574 nic->flags &= ~promiscuous;
1575
1576 if (netdev->flags & IFF_ALLMULTI ||
1577 netdev_mc_count(netdev) > E100_MAX_MULTICAST_ADDRS)
1578 nic->flags |= multicast_all;
1579 else
1580 nic->flags &= ~multicast_all;
1581
1582 e100_exec_cb(nic, NULL, e100_configure);
1583 e100_exec_cb(nic, NULL, e100_multi);
1584 }
1585
1586 static void e100_update_stats(struct nic *nic)
1587 {
1588 struct net_device *dev = nic->netdev;
1589 struct net_device_stats *ns = &dev->stats;
1590 struct stats *s = &nic->mem->stats;
1591 __le32 *complete = (nic->mac < mac_82558_D101_A4) ? &s->fc_xmt_pause :
1592 (nic->mac < mac_82559_D101M) ? (__le32 *)&s->xmt_tco_frames :
1593 &s->complete;
1594
1595 /* Device's stats reporting may take several microseconds to
1596 * complete, so we're always waiting for results of the
1597 * previous command. */
1598
1599 if (*complete == cpu_to_le32(cuc_dump_reset_complete)) {
1600 *complete = 0;
1601 nic->tx_frames = le32_to_cpu(s->tx_good_frames);
1602 nic->tx_collisions = le32_to_cpu(s->tx_total_collisions);
1603 ns->tx_aborted_errors += le32_to_cpu(s->tx_max_collisions);
1604 ns->tx_window_errors += le32_to_cpu(s->tx_late_collisions);
1605 ns->tx_carrier_errors += le32_to_cpu(s->tx_lost_crs);
1606 ns->tx_fifo_errors += le32_to_cpu(s->tx_underruns);
1607 ns->collisions += nic->tx_collisions;
1608 ns->tx_errors += le32_to_cpu(s->tx_max_collisions) +
1609 le32_to_cpu(s->tx_lost_crs);
1610 ns->rx_length_errors += le32_to_cpu(s->rx_short_frame_errors) +
1611 nic->rx_over_length_errors;
1612 ns->rx_crc_errors += le32_to_cpu(s->rx_crc_errors);
1613 ns->rx_frame_errors += le32_to_cpu(s->rx_alignment_errors);
1614 ns->rx_over_errors += le32_to_cpu(s->rx_overrun_errors);
1615 ns->rx_fifo_errors += le32_to_cpu(s->rx_overrun_errors);
1616 ns->rx_missed_errors += le32_to_cpu(s->rx_resource_errors);
1617 ns->rx_errors += le32_to_cpu(s->rx_crc_errors) +
1618 le32_to_cpu(s->rx_alignment_errors) +
1619 le32_to_cpu(s->rx_short_frame_errors) +
1620 le32_to_cpu(s->rx_cdt_errors);
1621 nic->tx_deferred += le32_to_cpu(s->tx_deferred);
1622 nic->tx_single_collisions +=
1623 le32_to_cpu(s->tx_single_collisions);
1624 nic->tx_multiple_collisions +=
1625 le32_to_cpu(s->tx_multiple_collisions);
1626 if (nic->mac >= mac_82558_D101_A4) {
1627 nic->tx_fc_pause += le32_to_cpu(s->fc_xmt_pause);
1628 nic->rx_fc_pause += le32_to_cpu(s->fc_rcv_pause);
1629 nic->rx_fc_unsupported +=
1630 le32_to_cpu(s->fc_rcv_unsupported);
1631 if (nic->mac >= mac_82559_D101M) {
1632 nic->tx_tco_frames +=
1633 le16_to_cpu(s->xmt_tco_frames);
1634 nic->rx_tco_frames +=
1635 le16_to_cpu(s->rcv_tco_frames);
1636 }
1637 }
1638 }
1639
1640
1641 if (e100_exec_cmd(nic, cuc_dump_reset, 0))
1642 netif_printk(nic, tx_err, KERN_DEBUG, nic->netdev,
1643 "exec cuc_dump_reset failed\n");
1644 }
1645
1646 static void e100_adjust_adaptive_ifs(struct nic *nic, int speed, int duplex)
1647 {
1648 /* Adjust inter-frame-spacing (IFS) between two transmits if
1649 * we're getting collisions on a half-duplex connection. */
1650
1651 if (duplex == DUPLEX_HALF) {
1652 u32 prev = nic->adaptive_ifs;
1653 u32 min_frames = (speed == SPEED_100) ? 1000 : 100;
1654
1655 if ((nic->tx_frames / 32 < nic->tx_collisions) &&
1656 (nic->tx_frames > min_frames)) {
1657 if (nic->adaptive_ifs < 60)
1658 nic->adaptive_ifs += 5;
1659 } else if (nic->tx_frames < min_frames) {
1660 if (nic->adaptive_ifs >= 5)
1661 nic->adaptive_ifs -= 5;
1662 }
1663 if (nic->adaptive_ifs != prev)
1664 e100_exec_cb(nic, NULL, e100_configure);
1665 }
1666 }
1667
1668 static void e100_watchdog(unsigned long data)
1669 {
1670 struct nic *nic = (struct nic *)data;
1671 struct ethtool_cmd cmd;
1672
1673 netif_printk(nic, timer, KERN_DEBUG, nic->netdev,
1674 "right now = %ld\n", jiffies);
1675
1676 /* mii library handles link maintenance tasks */
1677
1678 mii_ethtool_gset(&nic->mii, &cmd);
1679
1680 if (mii_link_ok(&nic->mii) && !netif_carrier_ok(nic->netdev)) {
1681 netdev_info(nic->netdev, "NIC Link is Up %u Mbps %s Duplex\n",
1682 cmd.speed == SPEED_100 ? 100 : 10,
1683 cmd.duplex == DUPLEX_FULL ? "Full" : "Half");
1684 } else if (!mii_link_ok(&nic->mii) && netif_carrier_ok(nic->netdev)) {
1685 netdev_info(nic->netdev, "NIC Link is Down\n");
1686 }
1687
1688 mii_check_link(&nic->mii);
1689
1690 /* Software generated interrupt to recover from (rare) Rx
1691 * allocation failure.
1692 * Unfortunately have to use a spinlock to not re-enable interrupts
1693 * accidentally, due to hardware that shares a register between the
1694 * interrupt mask bit and the SW Interrupt generation bit */
1695 spin_lock_irq(&nic->cmd_lock);
1696 iowrite8(ioread8(&nic->csr->scb.cmd_hi) | irq_sw_gen,&nic->csr->scb.cmd_hi);
1697 e100_write_flush(nic);
1698 spin_unlock_irq(&nic->cmd_lock);
1699
1700 e100_update_stats(nic);
1701 e100_adjust_adaptive_ifs(nic, cmd.speed, cmd.duplex);
1702
1703 if (nic->mac <= mac_82557_D100_C)
1704 /* Issue a multicast command to workaround a 557 lock up */
1705 e100_set_multicast_list(nic->netdev);
1706
1707 if (nic->flags & ich && cmd.speed==SPEED_10 && cmd.duplex==DUPLEX_HALF)
1708 /* Need SW workaround for ICH[x] 10Mbps/half duplex Tx hang. */
1709 nic->flags |= ich_10h_workaround;
1710 else
1711 nic->flags &= ~ich_10h_workaround;
1712
1713 mod_timer(&nic->watchdog,
1714 round_jiffies(jiffies + E100_WATCHDOG_PERIOD));
1715 }
1716
1717 static void e100_xmit_prepare(struct nic *nic, struct cb *cb,
1718 struct sk_buff *skb)
1719 {
1720 cb->command = nic->tx_command;
1721 /* interrupt every 16 packets regardless of delay */
1722 if ((nic->cbs_avail & ~15) == nic->cbs_avail)
1723 cb->command |= cpu_to_le16(cb_i);
1724 cb->u.tcb.tbd_array = cb->dma_addr + offsetof(struct cb, u.tcb.tbd);
1725 cb->u.tcb.tcb_byte_count = 0;
1726 cb->u.tcb.threshold = nic->tx_threshold;
1727 cb->u.tcb.tbd_count = 1;
1728 cb->u.tcb.tbd.buf_addr = cpu_to_le32(pci_map_single(nic->pdev,
1729 skb->data, skb->len, PCI_DMA_TODEVICE));
1730 /* check for mapping failure? */
1731 cb->u.tcb.tbd.size = cpu_to_le16(skb->len);
1732 }
1733
1734 static netdev_tx_t e100_xmit_frame(struct sk_buff *skb,
1735 struct net_device *netdev)
1736 {
1737 struct nic *nic = netdev_priv(netdev);
1738 int err;
1739
1740 if (nic->flags & ich_10h_workaround) {
1741 /* SW workaround for ICH[x] 10Mbps/half duplex Tx hang.
1742 Issue a NOP command followed by a 1us delay before
1743 issuing the Tx command. */
1744 if (e100_exec_cmd(nic, cuc_nop, 0))
1745 netif_printk(nic, tx_err, KERN_DEBUG, nic->netdev,
1746 "exec cuc_nop failed\n");
1747 udelay(1);
1748 }
1749
1750 err = e100_exec_cb(nic, skb, e100_xmit_prepare);
1751
1752 switch (err) {
1753 case -ENOSPC:
1754 /* We queued the skb, but now we're out of space. */
1755 netif_printk(nic, tx_err, KERN_DEBUG, nic->netdev,
1756 "No space for CB\n");
1757 netif_stop_queue(netdev);
1758 break;
1759 case -ENOMEM:
1760 /* This is a hard error - log it. */
1761 netif_printk(nic, tx_err, KERN_DEBUG, nic->netdev,
1762 "Out of Tx resources, returning skb\n");
1763 netif_stop_queue(netdev);
1764 return NETDEV_TX_BUSY;
1765 }
1766
1767 return NETDEV_TX_OK;
1768 }
1769
1770 static int e100_tx_clean(struct nic *nic)
1771 {
1772 struct net_device *dev = nic->netdev;
1773 struct cb *cb;
1774 int tx_cleaned = 0;
1775
1776 spin_lock(&nic->cb_lock);
1777
1778 /* Clean CBs marked complete */
1779 for (cb = nic->cb_to_clean;
1780 cb->status & cpu_to_le16(cb_complete);
1781 cb = nic->cb_to_clean = cb->next) {
1782 rmb(); /* read skb after status */
1783 netif_printk(nic, tx_done, KERN_DEBUG, nic->netdev,
1784 "cb[%d]->status = 0x%04X\n",
1785 (int)(((void*)cb - (void*)nic->cbs)/sizeof(struct cb)),
1786 cb->status);
1787
1788 if (likely(cb->skb != NULL)) {
1789 dev->stats.tx_packets++;
1790 dev->stats.tx_bytes += cb->skb->len;
1791
1792 pci_unmap_single(nic->pdev,
1793 le32_to_cpu(cb->u.tcb.tbd.buf_addr),
1794 le16_to_cpu(cb->u.tcb.tbd.size),
1795 PCI_DMA_TODEVICE);
1796 dev_kfree_skb_any(cb->skb);
1797 cb->skb = NULL;
1798 tx_cleaned = 1;
1799 }
1800 cb->status = 0;
1801 nic->cbs_avail++;
1802 }
1803
1804 spin_unlock(&nic->cb_lock);
1805
1806 /* Recover from running out of Tx resources in xmit_frame */
1807 if (unlikely(tx_cleaned && netif_queue_stopped(nic->netdev)))
1808 netif_wake_queue(nic->netdev);
1809
1810 return tx_cleaned;
1811 }
1812
1813 static void e100_clean_cbs(struct nic *nic)
1814 {
1815 if (nic->cbs) {
1816 while (nic->cbs_avail != nic->params.cbs.count) {
1817 struct cb *cb = nic->cb_to_clean;
1818 if (cb->skb) {
1819 pci_unmap_single(nic->pdev,
1820 le32_to_cpu(cb->u.tcb.tbd.buf_addr),
1821 le16_to_cpu(cb->u.tcb.tbd.size),
1822 PCI_DMA_TODEVICE);
1823 dev_kfree_skb(cb->skb);
1824 }
1825 nic->cb_to_clean = nic->cb_to_clean->next;
1826 nic->cbs_avail++;
1827 }
1828 pci_pool_free(nic->cbs_pool, nic->cbs, nic->cbs_dma_addr);
1829 nic->cbs = NULL;
1830 nic->cbs_avail = 0;
1831 }
1832 nic->cuc_cmd = cuc_start;
1833 nic->cb_to_use = nic->cb_to_send = nic->cb_to_clean =
1834 nic->cbs;
1835 }
1836
1837 static int e100_alloc_cbs(struct nic *nic)
1838 {
1839 struct cb *cb;
1840 unsigned int i, count = nic->params.cbs.count;
1841
1842 nic->cuc_cmd = cuc_start;
1843 nic->cb_to_use = nic->cb_to_send = nic->cb_to_clean = NULL;
1844 nic->cbs_avail = 0;
1845
1846 nic->cbs = pci_pool_alloc(nic->cbs_pool, GFP_KERNEL,
1847 &nic->cbs_dma_addr);
1848 if (!nic->cbs)
1849 return -ENOMEM;
1850 memset(nic->cbs, 0, count * sizeof(struct cb));
1851
1852 for (cb = nic->cbs, i = 0; i < count; cb++, i++) {
1853 cb->next = (i + 1 < count) ? cb + 1 : nic->cbs;
1854 cb->prev = (i == 0) ? nic->cbs + count - 1 : cb - 1;
1855
1856 cb->dma_addr = nic->cbs_dma_addr + i * sizeof(struct cb);
1857 cb->link = cpu_to_le32(nic->cbs_dma_addr +
1858 ((i+1) % count) * sizeof(struct cb));
1859 }
1860
1861 nic->cb_to_use = nic->cb_to_send = nic->cb_to_clean = nic->cbs;
1862 nic->cbs_avail = count;
1863
1864 return 0;
1865 }
1866
1867 static inline void e100_start_receiver(struct nic *nic, struct rx *rx)
1868 {
1869 if (!nic->rxs) return;
1870 if (RU_SUSPENDED != nic->ru_running) return;
1871
1872 /* handle init time starts */
1873 if (!rx) rx = nic->rxs;
1874
1875 /* (Re)start RU if suspended or idle and RFA is non-NULL */
1876 if (rx->skb) {
1877 e100_exec_cmd(nic, ruc_start, rx->dma_addr);
1878 nic->ru_running = RU_RUNNING;
1879 }
1880 }
1881
1882 #define RFD_BUF_LEN (sizeof(struct rfd) + VLAN_ETH_FRAME_LEN)
1883 static int e100_rx_alloc_skb(struct nic *nic, struct rx *rx)
1884 {
1885 if (!(rx->skb = netdev_alloc_skb_ip_align(nic->netdev, RFD_BUF_LEN)))
1886 return -ENOMEM;
1887
1888 /* Init, and map the RFD. */
1889 skb_copy_to_linear_data(rx->skb, &nic->blank_rfd, sizeof(struct rfd));
1890 rx->dma_addr = pci_map_single(nic->pdev, rx->skb->data,
1891 RFD_BUF_LEN, PCI_DMA_BIDIRECTIONAL);
1892
1893 if (pci_dma_mapping_error(nic->pdev, rx->dma_addr)) {
1894 dev_kfree_skb_any(rx->skb);
1895 rx->skb = NULL;
1896 rx->dma_addr = 0;
1897 return -ENOMEM;
1898 }
1899
1900 /* Link the RFD to end of RFA by linking previous RFD to
1901 * this one. We are safe to touch the previous RFD because
1902 * it is protected by the before last buffer's el bit being set */
1903 if (rx->prev->skb) {
1904 struct rfd *prev_rfd = (struct rfd *)rx->prev->skb->data;
1905 put_unaligned_le32(rx->dma_addr, &prev_rfd->link);
1906 pci_dma_sync_single_for_device(nic->pdev, rx->prev->dma_addr,
1907 sizeof(struct rfd), PCI_DMA_BIDIRECTIONAL);
1908 }
1909
1910 return 0;
1911 }
1912
1913 static int e100_rx_indicate(struct nic *nic, struct rx *rx,
1914 unsigned int *work_done, unsigned int work_to_do)
1915 {
1916 struct net_device *dev = nic->netdev;
1917 struct sk_buff *skb = rx->skb;
1918 struct rfd *rfd = (struct rfd *)skb->data;
1919 u16 rfd_status, actual_size;
1920
1921 if (unlikely(work_done && *work_done >= work_to_do))
1922 return -EAGAIN;
1923
1924 /* Need to sync before taking a peek at cb_complete bit */
1925 pci_dma_sync_single_for_cpu(nic->pdev, rx->dma_addr,
1926 sizeof(struct rfd), PCI_DMA_BIDIRECTIONAL);
1927 rfd_status = le16_to_cpu(rfd->status);
1928
1929 netif_printk(nic, rx_status, KERN_DEBUG, nic->netdev,
1930 "status=0x%04X\n", rfd_status);
1931 rmb(); /* read size after status bit */
1932
1933 /* If data isn't ready, nothing to indicate */
1934 if (unlikely(!(rfd_status & cb_complete))) {
1935 /* If the next buffer has the el bit, but we think the receiver
1936 * is still running, check to see if it really stopped while
1937 * we had interrupts off.
1938 * This allows for a fast restart without re-enabling
1939 * interrupts */
1940 if ((le16_to_cpu(rfd->command) & cb_el) &&
1941 (RU_RUNNING == nic->ru_running))
1942
1943 if (ioread8(&nic->csr->scb.status) & rus_no_res)
1944 nic->ru_running = RU_SUSPENDED;
1945 pci_dma_sync_single_for_device(nic->pdev, rx->dma_addr,
1946 sizeof(struct rfd),
1947 PCI_DMA_FROMDEVICE);
1948 return -ENODATA;
1949 }
1950
1951 /* Get actual data size */
1952 actual_size = le16_to_cpu(rfd->actual_size) & 0x3FFF;
1953 if (unlikely(actual_size > RFD_BUF_LEN - sizeof(struct rfd)))
1954 actual_size = RFD_BUF_LEN - sizeof(struct rfd);
1955
1956 /* Get data */
1957 pci_unmap_single(nic->pdev, rx->dma_addr,
1958 RFD_BUF_LEN, PCI_DMA_BIDIRECTIONAL);
1959
1960 /* If this buffer has the el bit, but we think the receiver
1961 * is still running, check to see if it really stopped while
1962 * we had interrupts off.
1963 * This allows for a fast restart without re-enabling interrupts.
1964 * This can happen when the RU sees the size change but also sees
1965 * the el bit set. */
1966 if ((le16_to_cpu(rfd->command) & cb_el) &&
1967 (RU_RUNNING == nic->ru_running)) {
1968
1969 if (ioread8(&nic->csr->scb.status) & rus_no_res)
1970 nic->ru_running = RU_SUSPENDED;
1971 }
1972
1973 /* Pull off the RFD and put the actual data (minus eth hdr) */
1974 skb_reserve(skb, sizeof(struct rfd));
1975 skb_put(skb, actual_size);
1976 skb->protocol = eth_type_trans(skb, nic->netdev);
1977
1978 if (unlikely(!(rfd_status & cb_ok))) {
1979 /* Don't indicate if hardware indicates errors */
1980 dev_kfree_skb_any(skb);
1981 } else if (actual_size > ETH_DATA_LEN + VLAN_ETH_HLEN) {
1982 /* Don't indicate oversized frames */
1983 nic->rx_over_length_errors++;
1984 dev_kfree_skb_any(skb);
1985 } else {
1986 dev->stats.rx_packets++;
1987 dev->stats.rx_bytes += actual_size;
1988 netif_receive_skb(skb);
1989 if (work_done)
1990 (*work_done)++;
1991 }
1992
1993 rx->skb = NULL;
1994
1995 return 0;
1996 }
1997
1998 static void e100_rx_clean(struct nic *nic, unsigned int *work_done,
1999 unsigned int work_to_do)
2000 {
2001 struct rx *rx;
2002 int restart_required = 0, err = 0;
2003 struct rx *old_before_last_rx, *new_before_last_rx;
2004 struct rfd *old_before_last_rfd, *new_before_last_rfd;
2005
2006 /* Indicate newly arrived packets */
2007 for (rx = nic->rx_to_clean; rx->skb; rx = nic->rx_to_clean = rx->next) {
2008 err = e100_rx_indicate(nic, rx, work_done, work_to_do);
2009 /* Hit quota or no more to clean */
2010 if (-EAGAIN == err || -ENODATA == err)
2011 break;
2012 }
2013
2014
2015 /* On EAGAIN, hit quota so have more work to do, restart once
2016 * cleanup is complete.
2017 * Else, are we already rnr? then pay attention!!! this ensures that
2018 * the state machine progression never allows a start with a
2019 * partially cleaned list, avoiding a race between hardware
2020 * and rx_to_clean when in NAPI mode */
2021 if (-EAGAIN != err && RU_SUSPENDED == nic->ru_running)
2022 restart_required = 1;
2023
2024 old_before_last_rx = nic->rx_to_use->prev->prev;
2025 old_before_last_rfd = (struct rfd *)old_before_last_rx->skb->data;
2026
2027 /* Alloc new skbs to refill list */
2028 for (rx = nic->rx_to_use; !rx->skb; rx = nic->rx_to_use = rx->next) {
2029 if (unlikely(e100_rx_alloc_skb(nic, rx)))
2030 break; /* Better luck next time (see watchdog) */
2031 }
2032
2033 new_before_last_rx = nic->rx_to_use->prev->prev;
2034 if (new_before_last_rx != old_before_last_rx) {
2035 /* Set the el-bit on the buffer that is before the last buffer.
2036 * This lets us update the next pointer on the last buffer
2037 * without worrying about hardware touching it.
2038 * We set the size to 0 to prevent hardware from touching this
2039 * buffer.
2040 * When the hardware hits the before last buffer with el-bit
2041 * and size of 0, it will RNR interrupt, the RUS will go into
2042 * the No Resources state. It will not complete nor write to
2043 * this buffer. */
2044 new_before_last_rfd =
2045 (struct rfd *)new_before_last_rx->skb->data;
2046 new_before_last_rfd->size = 0;
2047 new_before_last_rfd->command |= cpu_to_le16(cb_el);
2048 pci_dma_sync_single_for_device(nic->pdev,
2049 new_before_last_rx->dma_addr, sizeof(struct rfd),
2050 PCI_DMA_BIDIRECTIONAL);
2051
2052 /* Now that we have a new stopping point, we can clear the old
2053 * stopping point. We must sync twice to get the proper
2054 * ordering on the hardware side of things. */
2055 old_before_last_rfd->command &= ~cpu_to_le16(cb_el);
2056 pci_dma_sync_single_for_device(nic->pdev,
2057 old_before_last_rx->dma_addr, sizeof(struct rfd),
2058 PCI_DMA_BIDIRECTIONAL);
2059 old_before_last_rfd->size = cpu_to_le16(VLAN_ETH_FRAME_LEN);
2060 pci_dma_sync_single_for_device(nic->pdev,
2061 old_before_last_rx->dma_addr, sizeof(struct rfd),
2062 PCI_DMA_BIDIRECTIONAL);
2063 }
2064
2065 if (restart_required) {
2066 // ack the rnr?
2067 iowrite8(stat_ack_rnr, &nic->csr->scb.stat_ack);
2068 e100_start_receiver(nic, nic->rx_to_clean);
2069 if (work_done)
2070 (*work_done)++;
2071 }
2072 }
2073
2074 static void e100_rx_clean_list(struct nic *nic)
2075 {
2076 struct rx *rx;
2077 unsigned int i, count = nic->params.rfds.count;
2078
2079 nic->ru_running = RU_UNINITIALIZED;
2080
2081 if (nic->rxs) {
2082 for (rx = nic->rxs, i = 0; i < count; rx++, i++) {
2083 if (rx->skb) {
2084 pci_unmap_single(nic->pdev, rx->dma_addr,
2085 RFD_BUF_LEN, PCI_DMA_BIDIRECTIONAL);
2086 dev_kfree_skb(rx->skb);
2087 }
2088 }
2089 kfree(nic->rxs);
2090 nic->rxs = NULL;
2091 }
2092
2093 nic->rx_to_use = nic->rx_to_clean = NULL;
2094 }
2095
2096 static int e100_rx_alloc_list(struct nic *nic)
2097 {
2098 struct rx *rx;
2099 unsigned int i, count = nic->params.rfds.count;
2100 struct rfd *before_last;
2101
2102 nic->rx_to_use = nic->rx_to_clean = NULL;
2103 nic->ru_running = RU_UNINITIALIZED;
2104
2105 if (!(nic->rxs = kcalloc(count, sizeof(struct rx), GFP_ATOMIC)))
2106 return -ENOMEM;
2107
2108 for (rx = nic->rxs, i = 0; i < count; rx++, i++) {
2109 rx->next = (i + 1 < count) ? rx + 1 : nic->rxs;
2110 rx->prev = (i == 0) ? nic->rxs + count - 1 : rx - 1;
2111 if (e100_rx_alloc_skb(nic, rx)) {
2112 e100_rx_clean_list(nic);
2113 return -ENOMEM;
2114 }
2115 }
2116 /* Set the el-bit on the buffer that is before the last buffer.
2117 * This lets us update the next pointer on the last buffer without
2118 * worrying about hardware touching it.
2119 * We set the size to 0 to prevent hardware from touching this buffer.
2120 * When the hardware hits the before last buffer with el-bit and size
2121 * of 0, it will RNR interrupt, the RU will go into the No Resources
2122 * state. It will not complete nor write to this buffer. */
2123 rx = nic->rxs->prev->prev;
2124 before_last = (struct rfd *)rx->skb->data;
2125 before_last->command |= cpu_to_le16(cb_el);
2126 before_last->size = 0;
2127 pci_dma_sync_single_for_device(nic->pdev, rx->dma_addr,
2128 sizeof(struct rfd), PCI_DMA_BIDIRECTIONAL);
2129
2130 nic->rx_to_use = nic->rx_to_clean = nic->rxs;
2131 nic->ru_running = RU_SUSPENDED;
2132
2133 return 0;
2134 }
2135
2136 static irqreturn_t e100_intr(int irq, void *dev_id)
2137 {
2138 struct net_device *netdev = dev_id;
2139 struct nic *nic = netdev_priv(netdev);
2140 u8 stat_ack = ioread8(&nic->csr->scb.stat_ack);
2141
2142 netif_printk(nic, intr, KERN_DEBUG, nic->netdev,
2143 "stat_ack = 0x%02X\n", stat_ack);
2144
2145 if (stat_ack == stat_ack_not_ours || /* Not our interrupt */
2146 stat_ack == stat_ack_not_present) /* Hardware is ejected */
2147 return IRQ_NONE;
2148
2149 /* Ack interrupt(s) */
2150 iowrite8(stat_ack, &nic->csr->scb.stat_ack);
2151
2152 /* We hit Receive No Resource (RNR); restart RU after cleaning */
2153 if (stat_ack & stat_ack_rnr)
2154 nic->ru_running = RU_SUSPENDED;
2155
2156 if (likely(napi_schedule_prep(&nic->napi))) {
2157 e100_disable_irq(nic);
2158 __napi_schedule(&nic->napi);
2159 }
2160
2161 return IRQ_HANDLED;
2162 }
2163
2164 static int e100_poll(struct napi_struct *napi, int budget)
2165 {
2166 struct nic *nic = container_of(napi, struct nic, napi);
2167 unsigned int work_done = 0;
2168
2169 e100_rx_clean(nic, &work_done, budget);
2170 e100_tx_clean(nic);
2171
2172 /* If budget not fully consumed, exit the polling mode */
2173 if (work_done < budget) {
2174 napi_complete(napi);
2175 e100_enable_irq(nic);
2176 }
2177
2178 return work_done;
2179 }
2180
2181 #ifdef CONFIG_NET_POLL_CONTROLLER
2182 static void e100_netpoll(struct net_device *netdev)
2183 {
2184 struct nic *nic = netdev_priv(netdev);
2185
2186 e100_disable_irq(nic);
2187 e100_intr(nic->pdev->irq, netdev);
2188 e100_tx_clean(nic);
2189 e100_enable_irq(nic);
2190 }
2191 #endif
2192
2193 static int e100_set_mac_address(struct net_device *netdev, void *p)
2194 {
2195 struct nic *nic = netdev_priv(netdev);
2196 struct sockaddr *addr = p;
2197
2198 if (!is_valid_ether_addr(addr->sa_data))
2199 return -EADDRNOTAVAIL;
2200
2201 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2202 e100_exec_cb(nic, NULL, e100_setup_iaaddr);
2203
2204 return 0;
2205 }
2206
2207 static int e100_change_mtu(struct net_device *netdev, int new_mtu)
2208 {
2209 if (new_mtu < ETH_ZLEN || new_mtu > ETH_DATA_LEN)
2210 return -EINVAL;
2211 netdev->mtu = new_mtu;
2212 return 0;
2213 }
2214
2215 static int e100_asf(struct nic *nic)
2216 {
2217 /* ASF can be enabled from eeprom */
2218 return (nic->pdev->device >= 0x1050) && (nic->pdev->device <= 0x1057) &&
2219 (nic->eeprom[eeprom_config_asf] & eeprom_asf) &&
2220 !(nic->eeprom[eeprom_config_asf] & eeprom_gcl) &&
2221 ((nic->eeprom[eeprom_smbus_addr] & 0xFF) != 0xFE);
2222 }
2223
2224 static int e100_up(struct nic *nic)
2225 {
2226 int err;
2227
2228 if ((err = e100_rx_alloc_list(nic)))
2229 return err;
2230 if ((err = e100_alloc_cbs(nic)))
2231 goto err_rx_clean_list;
2232 if ((err = e100_hw_init(nic)))
2233 goto err_clean_cbs;
2234 e100_set_multicast_list(nic->netdev);
2235 e100_start_receiver(nic, NULL);
2236 mod_timer(&nic->watchdog, jiffies);
2237 if ((err = request_irq(nic->pdev->irq, e100_intr, IRQF_SHARED,
2238 nic->netdev->name, nic->netdev)))
2239 goto err_no_irq;
2240 netif_wake_queue(nic->netdev);
2241 napi_enable(&nic->napi);
2242 /* enable ints _after_ enabling poll, preventing a race between
2243 * disable ints+schedule */
2244 e100_enable_irq(nic);
2245 return 0;
2246
2247 err_no_irq:
2248 del_timer_sync(&nic->watchdog);
2249 err_clean_cbs:
2250 e100_clean_cbs(nic);
2251 err_rx_clean_list:
2252 e100_rx_clean_list(nic);
2253 return err;
2254 }
2255
2256 static void e100_down(struct nic *nic)
2257 {
2258 /* wait here for poll to complete */
2259 napi_disable(&nic->napi);
2260 netif_stop_queue(nic->netdev);
2261 e100_hw_reset(nic);
2262 free_irq(nic->pdev->irq, nic->netdev);
2263 del_timer_sync(&nic->watchdog);
2264 netif_carrier_off(nic->netdev);
2265 e100_clean_cbs(nic);
2266 e100_rx_clean_list(nic);
2267 }
2268
2269 static void e100_tx_timeout(struct net_device *netdev)
2270 {
2271 struct nic *nic = netdev_priv(netdev);
2272
2273 /* Reset outside of interrupt context, to avoid request_irq
2274 * in interrupt context */
2275 schedule_work(&nic->tx_timeout_task);
2276 }
2277
2278 static void e100_tx_timeout_task(struct work_struct *work)
2279 {
2280 struct nic *nic = container_of(work, struct nic, tx_timeout_task);
2281 struct net_device *netdev = nic->netdev;
2282
2283 netif_printk(nic, tx_err, KERN_DEBUG, nic->netdev,
2284 "scb.status=0x%02X\n", ioread8(&nic->csr->scb.status));
2285
2286 rtnl_lock();
2287 if (netif_running(netdev)) {
2288 e100_down(netdev_priv(netdev));
2289 e100_up(netdev_priv(netdev));
2290 }
2291 rtnl_unlock();
2292 }
2293
2294 static int e100_loopback_test(struct nic *nic, enum loopback loopback_mode)
2295 {
2296 int err;
2297 struct sk_buff *skb;
2298
2299 /* Use driver resources to perform internal MAC or PHY
2300 * loopback test. A single packet is prepared and transmitted
2301 * in loopback mode, and the test passes if the received
2302 * packet compares byte-for-byte to the transmitted packet. */
2303
2304 if ((err = e100_rx_alloc_list(nic)))
2305 return err;
2306 if ((err = e100_alloc_cbs(nic)))
2307 goto err_clean_rx;
2308
2309 /* ICH PHY loopback is broken so do MAC loopback instead */
2310 if (nic->flags & ich && loopback_mode == lb_phy)
2311 loopback_mode = lb_mac;
2312
2313 nic->loopback = loopback_mode;
2314 if ((err = e100_hw_init(nic)))
2315 goto err_loopback_none;
2316
2317 if (loopback_mode == lb_phy)
2318 mdio_write(nic->netdev, nic->mii.phy_id, MII_BMCR,
2319 BMCR_LOOPBACK);
2320
2321 e100_start_receiver(nic, NULL);
2322
2323 if (!(skb = netdev_alloc_skb(nic->netdev, ETH_DATA_LEN))) {
2324 err = -ENOMEM;
2325 goto err_loopback_none;
2326 }
2327 skb_put(skb, ETH_DATA_LEN);
2328 memset(skb->data, 0xFF, ETH_DATA_LEN);
2329 e100_xmit_frame(skb, nic->netdev);
2330
2331 msleep(10);
2332
2333 pci_dma_sync_single_for_cpu(nic->pdev, nic->rx_to_clean->dma_addr,
2334 RFD_BUF_LEN, PCI_DMA_BIDIRECTIONAL);
2335
2336 if (memcmp(nic->rx_to_clean->skb->data + sizeof(struct rfd),
2337 skb->data, ETH_DATA_LEN))
2338 err = -EAGAIN;
2339
2340 err_loopback_none:
2341 mdio_write(nic->netdev, nic->mii.phy_id, MII_BMCR, 0);
2342 nic->loopback = lb_none;
2343 e100_clean_cbs(nic);
2344 e100_hw_reset(nic);
2345 err_clean_rx:
2346 e100_rx_clean_list(nic);
2347 return err;
2348 }
2349
2350 #define MII_LED_CONTROL 0x1B
2351 #define E100_82552_LED_OVERRIDE 0x19
2352 #define E100_82552_LED_ON 0x000F /* LEDTX and LED_RX both on */
2353 #define E100_82552_LED_OFF 0x000A /* LEDTX and LED_RX both off */
2354 static void e100_blink_led(unsigned long data)
2355 {
2356 struct nic *nic = (struct nic *)data;
2357 enum led_state {
2358 led_on = 0x01,
2359 led_off = 0x04,
2360 led_on_559 = 0x05,
2361 led_on_557 = 0x07,
2362 };
2363 u16 led_reg = MII_LED_CONTROL;
2364
2365 if (nic->phy == phy_82552_v) {
2366 led_reg = E100_82552_LED_OVERRIDE;
2367
2368 nic->leds = (nic->leds == E100_82552_LED_ON) ?
2369 E100_82552_LED_OFF : E100_82552_LED_ON;
2370 } else {
2371 nic->leds = (nic->leds & led_on) ? led_off :
2372 (nic->mac < mac_82559_D101M) ? led_on_557 :
2373 led_on_559;
2374 }
2375 mdio_write(nic->netdev, nic->mii.phy_id, led_reg, nic->leds);
2376 mod_timer(&nic->blink_timer, jiffies + HZ / 4);
2377 }
2378
2379 static int e100_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
2380 {
2381 struct nic *nic = netdev_priv(netdev);
2382 return mii_ethtool_gset(&nic->mii, cmd);
2383 }
2384
2385 static int e100_set_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
2386 {
2387 struct nic *nic = netdev_priv(netdev);
2388 int err;
2389
2390 mdio_write(netdev, nic->mii.phy_id, MII_BMCR, BMCR_RESET);
2391 err = mii_ethtool_sset(&nic->mii, cmd);
2392 e100_exec_cb(nic, NULL, e100_configure);
2393
2394 return err;
2395 }
2396
2397 static void e100_get_drvinfo(struct net_device *netdev,
2398 struct ethtool_drvinfo *info)
2399 {
2400 struct nic *nic = netdev_priv(netdev);
2401 strcpy(info->driver, DRV_NAME);
2402 strcpy(info->version, DRV_VERSION);
2403 strcpy(info->fw_version, "N/A");
2404 strcpy(info->bus_info, pci_name(nic->pdev));
2405 }
2406
2407 #define E100_PHY_REGS 0x1C
2408 static int e100_get_regs_len(struct net_device *netdev)
2409 {
2410 struct nic *nic = netdev_priv(netdev);
2411 return 1 + E100_PHY_REGS + sizeof(nic->mem->dump_buf);
2412 }
2413
2414 static void e100_get_regs(struct net_device *netdev,
2415 struct ethtool_regs *regs, void *p)
2416 {
2417 struct nic *nic = netdev_priv(netdev);
2418 u32 *buff = p;
2419 int i;
2420
2421 regs->version = (1 << 24) | nic->pdev->revision;
2422 buff[0] = ioread8(&nic->csr->scb.cmd_hi) << 24 |
2423 ioread8(&nic->csr->scb.cmd_lo) << 16 |
2424 ioread16(&nic->csr->scb.status);
2425 for (i = E100_PHY_REGS; i >= 0; i--)
2426 buff[1 + E100_PHY_REGS - i] =
2427 mdio_read(netdev, nic->mii.phy_id, i);
2428 memset(nic->mem->dump_buf, 0, sizeof(nic->mem->dump_buf));
2429 e100_exec_cb(nic, NULL, e100_dump);
2430 msleep(10);
2431 memcpy(&buff[2 + E100_PHY_REGS], nic->mem->dump_buf,
2432 sizeof(nic->mem->dump_buf));
2433 }
2434
2435 static void e100_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
2436 {
2437 struct nic *nic = netdev_priv(netdev);
2438 wol->supported = (nic->mac >= mac_82558_D101_A4) ? WAKE_MAGIC : 0;
2439 wol->wolopts = (nic->flags & wol_magic) ? WAKE_MAGIC : 0;
2440 }
2441
2442 static int e100_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
2443 {
2444 struct nic *nic = netdev_priv(netdev);
2445
2446 if ((wol->wolopts && wol->wolopts != WAKE_MAGIC) ||
2447 !device_can_wakeup(&nic->pdev->dev))
2448 return -EOPNOTSUPP;
2449
2450 if (wol->wolopts)
2451 nic->flags |= wol_magic;
2452 else
2453 nic->flags &= ~wol_magic;
2454
2455 device_set_wakeup_enable(&nic->pdev->dev, wol->wolopts);
2456
2457 e100_exec_cb(nic, NULL, e100_configure);
2458
2459 return 0;
2460 }
2461
2462 static u32 e100_get_msglevel(struct net_device *netdev)
2463 {
2464 struct nic *nic = netdev_priv(netdev);
2465 return nic->msg_enable;
2466 }
2467
2468 static void e100_set_msglevel(struct net_device *netdev, u32 value)
2469 {
2470 struct nic *nic = netdev_priv(netdev);
2471 nic->msg_enable = value;
2472 }
2473
2474 static int e100_nway_reset(struct net_device *netdev)
2475 {
2476 struct nic *nic = netdev_priv(netdev);
2477 return mii_nway_restart(&nic->mii);
2478 }
2479
2480 static u32 e100_get_link(struct net_device *netdev)
2481 {
2482 struct nic *nic = netdev_priv(netdev);
2483 return mii_link_ok(&nic->mii);
2484 }
2485
2486 static int e100_get_eeprom_len(struct net_device *netdev)
2487 {
2488 struct nic *nic = netdev_priv(netdev);
2489 return nic->eeprom_wc << 1;
2490 }
2491
2492 #define E100_EEPROM_MAGIC 0x1234
2493 static int e100_get_eeprom(struct net_device *netdev,
2494 struct ethtool_eeprom *eeprom, u8 *bytes)
2495 {
2496 struct nic *nic = netdev_priv(netdev);
2497
2498 eeprom->magic = E100_EEPROM_MAGIC;
2499 memcpy(bytes, &((u8 *)nic->eeprom)[eeprom->offset], eeprom->len);
2500
2501 return 0;
2502 }
2503
2504 static int e100_set_eeprom(struct net_device *netdev,
2505 struct ethtool_eeprom *eeprom, u8 *bytes)
2506 {
2507 struct nic *nic = netdev_priv(netdev);
2508
2509 if (eeprom->magic != E100_EEPROM_MAGIC)
2510 return -EINVAL;
2511
2512 memcpy(&((u8 *)nic->eeprom)[eeprom->offset], bytes, eeprom->len);
2513
2514 return e100_eeprom_save(nic, eeprom->offset >> 1,
2515 (eeprom->len >> 1) + 1);
2516 }
2517
2518 static void e100_get_ringparam(struct net_device *netdev,
2519 struct ethtool_ringparam *ring)
2520 {
2521 struct nic *nic = netdev_priv(netdev);
2522 struct param_range *rfds = &nic->params.rfds;
2523 struct param_range *cbs = &nic->params.cbs;
2524
2525 ring->rx_max_pending = rfds->max;
2526 ring->tx_max_pending = cbs->max;
2527 ring->rx_mini_max_pending = 0;
2528 ring->rx_jumbo_max_pending = 0;
2529 ring->rx_pending = rfds->count;
2530 ring->tx_pending = cbs->count;
2531 ring->rx_mini_pending = 0;
2532 ring->rx_jumbo_pending = 0;
2533 }
2534
2535 static int e100_set_ringparam(struct net_device *netdev,
2536 struct ethtool_ringparam *ring)
2537 {
2538 struct nic *nic = netdev_priv(netdev);
2539 struct param_range *rfds = &nic->params.rfds;
2540 struct param_range *cbs = &nic->params.cbs;
2541
2542 if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
2543 return -EINVAL;
2544
2545 if (netif_running(netdev))
2546 e100_down(nic);
2547 rfds->count = max(ring->rx_pending, rfds->min);
2548 rfds->count = min(rfds->count, rfds->max);
2549 cbs->count = max(ring->tx_pending, cbs->min);
2550 cbs->count = min(cbs->count, cbs->max);
2551 netif_info(nic, drv, nic->netdev, "Ring Param settings: rx: %d, tx %d\n",
2552 rfds->count, cbs->count);
2553 if (netif_running(netdev))
2554 e100_up(nic);
2555
2556 return 0;
2557 }
2558
2559 static const char e100_gstrings_test[][ETH_GSTRING_LEN] = {
2560 "Link test (on/offline)",
2561 "Eeprom test (on/offline)",
2562 "Self test (offline)",
2563 "Mac loopback (offline)",
2564 "Phy loopback (offline)",
2565 };
2566 #define E100_TEST_LEN ARRAY_SIZE(e100_gstrings_test)
2567
2568 static void e100_diag_test(struct net_device *netdev,
2569 struct ethtool_test *test, u64 *data)
2570 {
2571 struct ethtool_cmd cmd;
2572 struct nic *nic = netdev_priv(netdev);
2573 int i, err;
2574
2575 memset(data, 0, E100_TEST_LEN * sizeof(u64));
2576 data[0] = !mii_link_ok(&nic->mii);
2577 data[1] = e100_eeprom_load(nic);
2578 if (test->flags & ETH_TEST_FL_OFFLINE) {
2579
2580 /* save speed, duplex & autoneg settings */
2581 err = mii_ethtool_gset(&nic->mii, &cmd);
2582
2583 if (netif_running(netdev))
2584 e100_down(nic);
2585 data[2] = e100_self_test(nic);
2586 data[3] = e100_loopback_test(nic, lb_mac);
2587 data[4] = e100_loopback_test(nic, lb_phy);
2588
2589 /* restore speed, duplex & autoneg settings */
2590 err = mii_ethtool_sset(&nic->mii, &cmd);
2591
2592 if (netif_running(netdev))
2593 e100_up(nic);
2594 }
2595 for (i = 0; i < E100_TEST_LEN; i++)
2596 test->flags |= data[i] ? ETH_TEST_FL_FAILED : 0;
2597
2598 msleep_interruptible(4 * 1000);
2599 }
2600
2601 static int e100_phys_id(struct net_device *netdev, u32 data)
2602 {
2603 struct nic *nic = netdev_priv(netdev);
2604 u16 led_reg = (nic->phy == phy_82552_v) ? E100_82552_LED_OVERRIDE :
2605 MII_LED_CONTROL;
2606
2607 if (!data || data > (u32)(MAX_SCHEDULE_TIMEOUT / HZ))
2608 data = (u32)(MAX_SCHEDULE_TIMEOUT / HZ);
2609 mod_timer(&nic->blink_timer, jiffies);
2610 msleep_interruptible(data * 1000);
2611 del_timer_sync(&nic->blink_timer);
2612 mdio_write(netdev, nic->mii.phy_id, led_reg, 0);
2613
2614 return 0;
2615 }
2616
2617 static const char e100_gstrings_stats[][ETH_GSTRING_LEN] = {
2618 "rx_packets", "tx_packets", "rx_bytes", "tx_bytes", "rx_errors",
2619 "tx_errors", "rx_dropped", "tx_dropped", "multicast", "collisions",
2620 "rx_length_errors", "rx_over_errors", "rx_crc_errors",
2621 "rx_frame_errors", "rx_fifo_errors", "rx_missed_errors",
2622 "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
2623 "tx_heartbeat_errors", "tx_window_errors",
2624 /* device-specific stats */
2625 "tx_deferred", "tx_single_collisions", "tx_multi_collisions",
2626 "tx_flow_control_pause", "rx_flow_control_pause",
2627 "rx_flow_control_unsupported", "tx_tco_packets", "rx_tco_packets",
2628 };
2629 #define E100_NET_STATS_LEN 21
2630 #define E100_STATS_LEN ARRAY_SIZE(e100_gstrings_stats)
2631
2632 static int e100_get_sset_count(struct net_device *netdev, int sset)
2633 {
2634 switch (sset) {
2635 case ETH_SS_TEST:
2636 return E100_TEST_LEN;
2637 case ETH_SS_STATS:
2638 return E100_STATS_LEN;
2639 default:
2640 return -EOPNOTSUPP;
2641 }
2642 }
2643
2644 static void e100_get_ethtool_stats(struct net_device *netdev,
2645 struct ethtool_stats *stats, u64 *data)
2646 {
2647 struct nic *nic = netdev_priv(netdev);
2648 int i;
2649
2650 for (i = 0; i < E100_NET_STATS_LEN; i++)
2651 data[i] = ((unsigned long *)&netdev->stats)[i];
2652
2653 data[i++] = nic->tx_deferred;
2654 data[i++] = nic->tx_single_collisions;
2655 data[i++] = nic->tx_multiple_collisions;
2656 data[i++] = nic->tx_fc_pause;
2657 data[i++] = nic->rx_fc_pause;
2658 data[i++] = nic->rx_fc_unsupported;
2659 data[i++] = nic->tx_tco_frames;
2660 data[i++] = nic->rx_tco_frames;
2661 }
2662
2663 static void e100_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
2664 {
2665 switch (stringset) {
2666 case ETH_SS_TEST:
2667 memcpy(data, *e100_gstrings_test, sizeof(e100_gstrings_test));
2668 break;
2669 case ETH_SS_STATS:
2670 memcpy(data, *e100_gstrings_stats, sizeof(e100_gstrings_stats));
2671 break;
2672 }
2673 }
2674
2675 static const struct ethtool_ops e100_ethtool_ops = {
2676 .get_settings = e100_get_settings,
2677 .set_settings = e100_set_settings,
2678 .get_drvinfo = e100_get_drvinfo,
2679 .get_regs_len = e100_get_regs_len,
2680 .get_regs = e100_get_regs,
2681 .get_wol = e100_get_wol,
2682 .set_wol = e100_set_wol,
2683 .get_msglevel = e100_get_msglevel,
2684 .set_msglevel = e100_set_msglevel,
2685 .nway_reset = e100_nway_reset,
2686 .get_link = e100_get_link,
2687 .get_eeprom_len = e100_get_eeprom_len,
2688 .get_eeprom = e100_get_eeprom,
2689 .set_eeprom = e100_set_eeprom,
2690 .get_ringparam = e100_get_ringparam,
2691 .set_ringparam = e100_set_ringparam,
2692 .self_test = e100_diag_test,
2693 .get_strings = e100_get_strings,
2694 .phys_id = e100_phys_id,
2695 .get_ethtool_stats = e100_get_ethtool_stats,
2696 .get_sset_count = e100_get_sset_count,
2697 };
2698
2699 static int e100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2700 {
2701 struct nic *nic = netdev_priv(netdev);
2702
2703 return generic_mii_ioctl(&nic->mii, if_mii(ifr), cmd, NULL);
2704 }
2705
2706 static int e100_alloc(struct nic *nic)
2707 {
2708 nic->mem = pci_alloc_consistent(nic->pdev, sizeof(struct mem),
2709 &nic->dma_addr);
2710 return nic->mem ? 0 : -ENOMEM;
2711 }
2712
2713 static void e100_free(struct nic *nic)
2714 {
2715 if (nic->mem) {
2716 pci_free_consistent(nic->pdev, sizeof(struct mem),
2717 nic->mem, nic->dma_addr);
2718 nic->mem = NULL;
2719 }
2720 }
2721
2722 static int e100_open(struct net_device *netdev)
2723 {
2724 struct nic *nic = netdev_priv(netdev);
2725 int err = 0;
2726
2727 netif_carrier_off(netdev);
2728 if ((err = e100_up(nic)))
2729 netif_err(nic, ifup, nic->netdev, "Cannot open interface, aborting\n");
2730 return err;
2731 }
2732
2733 static int e100_close(struct net_device *netdev)
2734 {
2735 e100_down(netdev_priv(netdev));
2736 return 0;
2737 }
2738
2739 static const struct net_device_ops e100_netdev_ops = {
2740 .ndo_open = e100_open,
2741 .ndo_stop = e100_close,
2742 .ndo_start_xmit = e100_xmit_frame,
2743 .ndo_validate_addr = eth_validate_addr,
2744 .ndo_set_multicast_list = e100_set_multicast_list,
2745 .ndo_set_mac_address = e100_set_mac_address,
2746 .ndo_change_mtu = e100_change_mtu,
2747 .ndo_do_ioctl = e100_do_ioctl,
2748 .ndo_tx_timeout = e100_tx_timeout,
2749 #ifdef CONFIG_NET_POLL_CONTROLLER
2750 .ndo_poll_controller = e100_netpoll,
2751 #endif
2752 };
2753
2754 static int __devinit e100_probe(struct pci_dev *pdev,
2755 const struct pci_device_id *ent)
2756 {
2757 struct net_device *netdev;
2758 struct nic *nic;
2759 int err;
2760
2761 if (!(netdev = alloc_etherdev(sizeof(struct nic)))) {
2762 if (((1 << debug) - 1) & NETIF_MSG_PROBE)
2763 pr_err("Etherdev alloc failed, aborting\n");
2764 return -ENOMEM;
2765 }
2766
2767 netdev->netdev_ops = &e100_netdev_ops;
2768 SET_ETHTOOL_OPS(netdev, &e100_ethtool_ops);
2769 netdev->watchdog_timeo = E100_WATCHDOG_PERIOD;
2770 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2771
2772 nic = netdev_priv(netdev);
2773 netif_napi_add(netdev, &nic->napi, e100_poll, E100_NAPI_WEIGHT);
2774 nic->netdev = netdev;
2775 nic->pdev = pdev;
2776 nic->msg_enable = (1 << debug) - 1;
2777 nic->mdio_ctrl = mdio_ctrl_hw;
2778 pci_set_drvdata(pdev, netdev);
2779
2780 if ((err = pci_enable_device(pdev))) {
2781 netif_err(nic, probe, nic->netdev, "Cannot enable PCI device, aborting\n");
2782 goto err_out_free_dev;
2783 }
2784
2785 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
2786 netif_err(nic, probe, nic->netdev, "Cannot find proper PCI device base address, aborting\n");
2787 err = -ENODEV;
2788 goto err_out_disable_pdev;
2789 }
2790
2791 if ((err = pci_request_regions(pdev, DRV_NAME))) {
2792 netif_err(nic, probe, nic->netdev, "Cannot obtain PCI resources, aborting\n");
2793 goto err_out_disable_pdev;
2794 }
2795
2796 if ((err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))) {
2797 netif_err(nic, probe, nic->netdev, "No usable DMA configuration, aborting\n");
2798 goto err_out_free_res;
2799 }
2800
2801 SET_NETDEV_DEV(netdev, &pdev->dev);
2802
2803 if (use_io)
2804 netif_info(nic, probe, nic->netdev, "using i/o access mode\n");
2805
2806 nic->csr = pci_iomap(pdev, (use_io ? 1 : 0), sizeof(struct csr));
2807 if (!nic->csr) {
2808 netif_err(nic, probe, nic->netdev, "Cannot map device registers, aborting\n");
2809 err = -ENOMEM;
2810 goto err_out_free_res;
2811 }
2812
2813 if (ent->driver_data)
2814 nic->flags |= ich;
2815 else
2816 nic->flags &= ~ich;
2817
2818 e100_get_defaults(nic);
2819
2820 /* locks must be initialized before calling hw_reset */
2821 spin_lock_init(&nic->cb_lock);
2822 spin_lock_init(&nic->cmd_lock);
2823 spin_lock_init(&nic->mdio_lock);
2824
2825 /* Reset the device before pci_set_master() in case device is in some
2826 * funky state and has an interrupt pending - hint: we don't have the
2827 * interrupt handler registered yet. */
2828 e100_hw_reset(nic);
2829
2830 pci_set_master(pdev);
2831
2832 init_timer(&nic->watchdog);
2833 nic->watchdog.function = e100_watchdog;
2834 nic->watchdog.data = (unsigned long)nic;
2835 init_timer(&nic->blink_timer);
2836 nic->blink_timer.function = e100_blink_led;
2837 nic->blink_timer.data = (unsigned long)nic;
2838
2839 INIT_WORK(&nic->tx_timeout_task, e100_tx_timeout_task);
2840
2841 if ((err = e100_alloc(nic))) {
2842 netif_err(nic, probe, nic->netdev, "Cannot alloc driver memory, aborting\n");
2843 goto err_out_iounmap;
2844 }
2845
2846 if ((err = e100_eeprom_load(nic)))
2847 goto err_out_free;
2848
2849 e100_phy_init(nic);
2850
2851 memcpy(netdev->dev_addr, nic->eeprom, ETH_ALEN);
2852 memcpy(netdev->perm_addr, nic->eeprom, ETH_ALEN);
2853 if (!is_valid_ether_addr(netdev->perm_addr)) {
2854 if (!eeprom_bad_csum_allow) {
2855 netif_err(nic, probe, nic->netdev, "Invalid MAC address from EEPROM, aborting\n");
2856 err = -EAGAIN;
2857 goto err_out_free;
2858 } else {
2859 netif_err(nic, probe, nic->netdev, "Invalid MAC address from EEPROM, you MUST configure one.\n");
2860 }
2861 }
2862
2863 /* Wol magic packet can be enabled from eeprom */
2864 if ((nic->mac >= mac_82558_D101_A4) &&
2865 (nic->eeprom[eeprom_id] & eeprom_id_wol)) {
2866 nic->flags |= wol_magic;
2867 device_set_wakeup_enable(&pdev->dev, true);
2868 }
2869
2870 /* ack any pending wake events, disable PME */
2871 pci_pme_active(pdev, false);
2872
2873 strcpy(netdev->name, "eth%d");
2874 if ((err = register_netdev(netdev))) {
2875 netif_err(nic, probe, nic->netdev, "Cannot register net device, aborting\n");
2876 goto err_out_free;
2877 }
2878 nic->cbs_pool = pci_pool_create(netdev->name,
2879 nic->pdev,
2880 nic->params.cbs.max * sizeof(struct cb),
2881 sizeof(u32),
2882 0);
2883 netif_info(nic, probe, nic->netdev,
2884 "addr 0x%llx, irq %d, MAC addr %pM\n",
2885 (unsigned long long)pci_resource_start(pdev, use_io ? 1 : 0),
2886 pdev->irq, netdev->dev_addr);
2887
2888 return 0;
2889
2890 err_out_free:
2891 e100_free(nic);
2892 err_out_iounmap:
2893 pci_iounmap(pdev, nic->csr);
2894 err_out_free_res:
2895 pci_release_regions(pdev);
2896 err_out_disable_pdev:
2897 pci_disable_device(pdev);
2898 err_out_free_dev:
2899 pci_set_drvdata(pdev, NULL);
2900 free_netdev(netdev);
2901 return err;
2902 }
2903
2904 static void __devexit e100_remove(struct pci_dev *pdev)
2905 {
2906 struct net_device *netdev = pci_get_drvdata(pdev);
2907
2908 if (netdev) {
2909 struct nic *nic = netdev_priv(netdev);
2910 unregister_netdev(netdev);
2911 e100_free(nic);
2912 pci_iounmap(pdev, nic->csr);
2913 pci_pool_destroy(nic->cbs_pool);
2914 free_netdev(netdev);
2915 pci_release_regions(pdev);
2916 pci_disable_device(pdev);
2917 pci_set_drvdata(pdev, NULL);
2918 }
2919 }
2920
2921 #define E100_82552_SMARTSPEED 0x14 /* SmartSpeed Ctrl register */
2922 #define E100_82552_REV_ANEG 0x0200 /* Reverse auto-negotiation */
2923 #define E100_82552_ANEG_NOW 0x0400 /* Auto-negotiate now */
2924 static void __e100_shutdown(struct pci_dev *pdev, bool *enable_wake)
2925 {
2926 struct net_device *netdev = pci_get_drvdata(pdev);
2927 struct nic *nic = netdev_priv(netdev);
2928
2929 if (netif_running(netdev))
2930 e100_down(nic);
2931 netif_device_detach(netdev);
2932
2933 pci_save_state(pdev);
2934
2935 if ((nic->flags & wol_magic) | e100_asf(nic)) {
2936 /* enable reverse auto-negotiation */
2937 if (nic->phy == phy_82552_v) {
2938 u16 smartspeed = mdio_read(netdev, nic->mii.phy_id,
2939 E100_82552_SMARTSPEED);
2940
2941 mdio_write(netdev, nic->mii.phy_id,
2942 E100_82552_SMARTSPEED, smartspeed |
2943 E100_82552_REV_ANEG | E100_82552_ANEG_NOW);
2944 }
2945 *enable_wake = true;
2946 } else {
2947 *enable_wake = false;
2948 }
2949
2950 pci_disable_device(pdev);
2951 }
2952
2953 static int __e100_power_off(struct pci_dev *pdev, bool wake)
2954 {
2955 if (wake)
2956 return pci_prepare_to_sleep(pdev);
2957
2958 pci_wake_from_d3(pdev, false);
2959 pci_set_power_state(pdev, PCI_D3hot);
2960
2961 return 0;
2962 }
2963
2964 #ifdef CONFIG_PM
2965 static int e100_suspend(struct pci_dev *pdev, pm_message_t state)
2966 {
2967 bool wake;
2968 __e100_shutdown(pdev, &wake);
2969 return __e100_power_off(pdev, wake);
2970 }
2971
2972 static int e100_resume(struct pci_dev *pdev)
2973 {
2974 struct net_device *netdev = pci_get_drvdata(pdev);
2975 struct nic *nic = netdev_priv(netdev);
2976
2977 pci_set_power_state(pdev, PCI_D0);
2978 pci_restore_state(pdev);
2979 /* ack any pending wake events, disable PME */
2980 pci_enable_wake(pdev, 0, 0);
2981
2982 /* disable reverse auto-negotiation */
2983 if (nic->phy == phy_82552_v) {
2984 u16 smartspeed = mdio_read(netdev, nic->mii.phy_id,
2985 E100_82552_SMARTSPEED);
2986
2987 mdio_write(netdev, nic->mii.phy_id,
2988 E100_82552_SMARTSPEED,
2989 smartspeed & ~(E100_82552_REV_ANEG));
2990 }
2991
2992 netif_device_attach(netdev);
2993 if (netif_running(netdev))
2994 e100_up(nic);
2995
2996 return 0;
2997 }
2998 #endif /* CONFIG_PM */
2999
3000 static void e100_shutdown(struct pci_dev *pdev)
3001 {
3002 bool wake;
3003 __e100_shutdown(pdev, &wake);
3004 if (system_state == SYSTEM_POWER_OFF)
3005 __e100_power_off(pdev, wake);
3006 }
3007
3008 /* ------------------ PCI Error Recovery infrastructure -------------- */
3009 /**
3010 * e100_io_error_detected - called when PCI error is detected.
3011 * @pdev: Pointer to PCI device
3012 * @state: The current pci connection state
3013 */
3014 static pci_ers_result_t e100_io_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
3015 {
3016 struct net_device *netdev = pci_get_drvdata(pdev);
3017 struct nic *nic = netdev_priv(netdev);
3018
3019 netif_device_detach(netdev);
3020
3021 if (state == pci_channel_io_perm_failure)
3022 return PCI_ERS_RESULT_DISCONNECT;
3023
3024 if (netif_running(netdev))
3025 e100_down(nic);
3026 pci_disable_device(pdev);
3027
3028 /* Request a slot reset. */
3029 return PCI_ERS_RESULT_NEED_RESET;
3030 }
3031
3032 /**
3033 * e100_io_slot_reset - called after the pci bus has been reset.
3034 * @pdev: Pointer to PCI device
3035 *
3036 * Restart the card from scratch.
3037 */
3038 static pci_ers_result_t e100_io_slot_reset(struct pci_dev *pdev)
3039 {
3040 struct net_device *netdev = pci_get_drvdata(pdev);
3041 struct nic *nic = netdev_priv(netdev);
3042
3043 if (pci_enable_device(pdev)) {
3044 pr_err("Cannot re-enable PCI device after reset\n");
3045 return PCI_ERS_RESULT_DISCONNECT;
3046 }
3047 pci_set_master(pdev);
3048
3049 /* Only one device per card can do a reset */
3050 if (0 != PCI_FUNC(pdev->devfn))
3051 return PCI_ERS_RESULT_RECOVERED;
3052 e100_hw_reset(nic);
3053 e100_phy_init(nic);
3054
3055 return PCI_ERS_RESULT_RECOVERED;
3056 }
3057
3058 /**
3059 * e100_io_resume - resume normal operations
3060 * @pdev: Pointer to PCI device
3061 *
3062 * Resume normal operations after an error recovery
3063 * sequence has been completed.
3064 */
3065 static void e100_io_resume(struct pci_dev *pdev)
3066 {
3067 struct net_device *netdev = pci_get_drvdata(pdev);
3068 struct nic *nic = netdev_priv(netdev);
3069
3070 /* ack any pending wake events, disable PME */
3071 pci_enable_wake(pdev, 0, 0);
3072
3073 netif_device_attach(netdev);
3074 if (netif_running(netdev)) {
3075 e100_open(netdev);
3076 mod_timer(&nic->watchdog, jiffies);
3077 }
3078 }
3079
3080 static struct pci_error_handlers e100_err_handler = {
3081 .error_detected = e100_io_error_detected,
3082 .slot_reset = e100_io_slot_reset,
3083 .resume = e100_io_resume,
3084 };
3085
3086 static struct pci_driver e100_driver = {
3087 .name = DRV_NAME,
3088 .id_table = e100_id_table,
3089 .probe = e100_probe,
3090 .remove = __devexit_p(e100_remove),
3091 #ifdef CONFIG_PM
3092 /* Power Management hooks */
3093 .suspend = e100_suspend,
3094 .resume = e100_resume,
3095 #endif
3096 .shutdown = e100_shutdown,
3097 .err_handler = &e100_err_handler,
3098 };
3099
3100 static int __init e100_init_module(void)
3101 {
3102 if (((1 << debug) - 1) & NETIF_MSG_DRV) {
3103 pr_info("%s, %s\n", DRV_DESCRIPTION, DRV_VERSION);
3104 pr_info("%s\n", DRV_COPYRIGHT);
3105 }
3106 return pci_register_driver(&e100_driver);
3107 }
3108
3109 static void __exit e100_cleanup_module(void)
3110 {
3111 pci_unregister_driver(&e100_driver);
3112 }
3113
3114 module_init(e100_init_module);
3115 module_exit(e100_cleanup_module);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree