1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * acenic.c: Linux driver for the Alteon AceNIC Gigabit Ethernet card
4 * and other Tigon based cards.
5 *
6 * Copyright 1998-2002 by Jes Sorensen, <jes@trained-monkey.org>.
7 *
8 * Thanks to Alteon and 3Com for providing hardware and documentation
9 * enabling me to write this driver.
10 *
11 * A mailing list for discussing the use of this driver has been
12 * setup, please subscribe to the lists if you have any questions
13 * about the driver. Send mail to linux-acenic-help@sunsite.auc.dk to
14 * see how to subscribe.
15 *
16 * Additional credits:
17 * Pete Wyckoff <wyckoff@ca.sandia.gov>: Initial Linux/Alpha and trace
18 * dump support. The trace dump support has not been
19 * integrated yet however.
20 * Troy Benjegerdes: Big Endian (PPC) patches.
21 * Nate Stahl: Better out of memory handling and stats support.
22 * Aman Singla: Nasty race between interrupt handler and tx code dealing
23 * with 'testing the tx_ret_csm and setting tx_full'
24 * David S. Miller <davem@redhat.com>: conversion to new PCI dma mapping
25 * infrastructure and Sparc support
26 * Pierrick Pinasseau (CERN): For lending me an Ultra 5 to test the
27 * driver under Linux/Sparc64
28 * Matt Domsch <Matt_Domsch@dell.com>: Detect Alteon 1000baseT cards
29 * ETHTOOL_GDRVINFO support
30 * Chip Salzenberg <chip@valinux.com>: Fix race condition between tx
31 * handler and close() cleanup.
32 * Ken Aaker <kdaaker@rchland.vnet.ibm.com>: Correct check for whether
33 * memory mapped IO is enabled to
34 * make the driver work on RS/6000.
35 * Takayoshi Kouchi <kouchi@hpc.bs1.fc.nec.co.jp>: Identifying problem
36 * where the driver would disable
37 * bus master mode if it had to disable
38 * write and invalidate.
39 * Stephen Hack <stephen_hack@hp.com>: Fixed ace_set_mac_addr for little
40 * endian systems.
41 * Val Henson <vhenson@esscom.com>: Reset Jumbo skb producer and
42 * rx producer index when
43 * flushing the Jumbo ring.
44 * Hans Grobler <grobh@sun.ac.za>: Memory leak fixes in the
45 * driver init path.
46 * Grant Grundler <grundler@cup.hp.com>: PCI write posting fixes.
47 */
48
49#include <linux/module.h>
50#include <linux/moduleparam.h>
51#include <linux/types.h>
52#include <linux/errno.h>
53#include <linux/ioport.h>
54#include <linux/pci.h>
55#include <linux/dma-mapping.h>
56#include <linux/kernel.h>
57#include <linux/netdevice.h>
58#include <linux/etherdevice.h>
59#include <linux/skbuff.h>
60#include <linux/delay.h>
61#include <linux/mm.h>
62#include <linux/highmem.h>
63#include <linux/sockios.h>
64#include <linux/firmware.h>
65#include <linux/slab.h>
66#include <linux/prefetch.h>
67#include <linux/if_vlan.h>
68
69#ifdef SIOCETHTOOL
70#include <linux/ethtool.h>
71#endif
72
73#include <net/sock.h>
74#include <net/ip.h>
75
76#include <asm/io.h>
77#include <asm/irq.h>
78#include <asm/byteorder.h>
79#include <linux/uaccess.h>
80
81
82#define DRV_NAME "acenic"
83
84#undef INDEX_DEBUG
85
86#ifdef CONFIG_ACENIC_OMIT_TIGON_I
87#define ACE_IS_TIGON_I(ap) 0
88#define ACE_TX_RING_ENTRIES(ap) MAX_TX_RING_ENTRIES
89#else
90#define ACE_IS_TIGON_I(ap) (ap->version == 1)
91#define ACE_TX_RING_ENTRIES(ap) ap->tx_ring_entries
92#endif
93
94#ifndef PCI_VENDOR_ID_ALTEON
95#define PCI_VENDOR_ID_ALTEON 0x12ae
96#endif
97#ifndef PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE
98#define PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE 0x0001
99#define PCI_DEVICE_ID_ALTEON_ACENIC_COPPER 0x0002
100#endif
101#ifndef PCI_DEVICE_ID_3COM_3C985
102#define PCI_DEVICE_ID_3COM_3C985 0x0001
103#endif
104#ifndef PCI_VENDOR_ID_NETGEAR
105#define PCI_VENDOR_ID_NETGEAR 0x1385
106#define PCI_DEVICE_ID_NETGEAR_GA620 0x620a
107#endif
108#ifndef PCI_DEVICE_ID_NETGEAR_GA620T
109#define PCI_DEVICE_ID_NETGEAR_GA620T 0x630a
110#endif
111
112
113/*
114 * Farallon used the DEC vendor ID by mistake and they seem not
115 * to care - stinky!
116 */
117#ifndef PCI_DEVICE_ID_FARALLON_PN9000SX
118#define PCI_DEVICE_ID_FARALLON_PN9000SX 0x1a
119#endif
120#ifndef PCI_DEVICE_ID_FARALLON_PN9100T
121#define PCI_DEVICE_ID_FARALLON_PN9100T 0xfa
122#endif
123#ifndef PCI_VENDOR_ID_SGI
124#define PCI_VENDOR_ID_SGI 0x10a9
125#endif
126#ifndef PCI_DEVICE_ID_SGI_ACENIC
127#define PCI_DEVICE_ID_SGI_ACENIC 0x0009
128#endif
129
130static const struct pci_device_id acenic_pci_tbl[] = {
131 { PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_ALTEON_ACENIC_FIBRE,
132 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
133 { PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_ALTEON_ACENIC_COPPER,
134 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
135 { PCI_VENDOR_ID_3COM, PCI_DEVICE_ID_3COM_3C985,
136 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
137 { PCI_VENDOR_ID_NETGEAR, PCI_DEVICE_ID_NETGEAR_GA620,
138 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
139 { PCI_VENDOR_ID_NETGEAR, PCI_DEVICE_ID_NETGEAR_GA620T,
140 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
141 /*
142 * Farallon used the DEC vendor ID on their cards incorrectly,
143 * then later Alteon's ID.
144 */
145 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_FARALLON_PN9000SX,
146 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
147 { PCI_VENDOR_ID_ALTEON, PCI_DEVICE_ID_FARALLON_PN9100T,
148 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
149 { PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_ACENIC,
150 PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET << 8, 0xffff00, },
151 { }
152};
153MODULE_DEVICE_TABLE(pci, acenic_pci_tbl);
154
155#define ace_sync_irq(irq) synchronize_irq(irq)
156
157#ifndef offset_in_page
158#define offset_in_page(ptr) ((unsigned long)(ptr) & ~PAGE_MASK)
159#endif
160
161#define ACE_MAX_MOD_PARMS 8
162#define BOARD_IDX_STATIC 0
163#define BOARD_IDX_OVERFLOW -1
164
165#include "acenic.h"
166
167/*
168 * These must be defined before the firmware is included.
169 */
170#define MAX_TEXT_LEN 96*1024
171#define MAX_RODATA_LEN 8*1024
172#define MAX_DATA_LEN 2*1024
173
174#ifndef tigon2FwReleaseLocal
175#define tigon2FwReleaseLocal 0
176#endif
177
178/*
179 * This driver currently supports Tigon I and Tigon II based cards
180 * including the Alteon AceNIC, the 3Com 3C985[B] and NetGear
181 * GA620. The driver should also work on the SGI, DEC and Farallon
182 * versions of the card, however I have not been able to test that
183 * myself.
184 *
185 * This card is really neat, it supports receive hardware checksumming
186 * and jumbo frames (up to 9000 bytes) and does a lot of work in the
187 * firmware. Also the programming interface is quite neat, except for
188 * the parts dealing with the i2c eeprom on the card ;-)
189 *
190 * Using jumbo frames:
191 *
192 * To enable jumbo frames, simply specify an mtu between 1500 and 9000
193 * bytes to ifconfig. Jumbo frames can be enabled or disabled at any time
194 * by running `ifconfig eth<X> mtu <MTU>' with <X> being the Ethernet
195 * interface number and <MTU> being the MTU value.
196 *
197 * Module parameters:
198 *
199 * When compiled as a loadable module, the driver allows for a number
200 * of module parameters to be specified. The driver supports the
201 * following module parameters:
202 *
203 * trace=<val> - Firmware trace level. This requires special traced
204 * firmware to replace the firmware supplied with
205 * the driver - for debugging purposes only.
206 *
207 * link=<val> - Link state. Normally you want to use the default link
208 * parameters set by the driver. This can be used to
209 * override these in case your switch doesn't negotiate
210 * the link properly. Valid values are:
211 * 0x0001 - Force half duplex link.
212 * 0x0002 - Do not negotiate line speed with the other end.
213 * 0x0010 - 10Mbit/sec link.
214 * 0x0020 - 100Mbit/sec link.
215 * 0x0040 - 1000Mbit/sec link.
216 * 0x0100 - Do not negotiate flow control.
217 * 0x0200 - Enable RX flow control Y
218 * 0x0400 - Enable TX flow control Y (Tigon II NICs only).
219 * Default value is 0x0270, ie. enable link+flow
220 * control negotiation. Negotiating the highest
221 * possible link speed with RX flow control enabled.
222 *
223 * When disabling link speed negotiation, only one link
224 * speed is allowed to be specified!
225 *
226 * tx_coal_tick=<val> - number of coalescing clock ticks (us) allowed
227 * to wait for more packets to arive before
228 * interrupting the host, from the time the first
229 * packet arrives.
230 *
231 * rx_coal_tick=<val> - number of coalescing clock ticks (us) allowed
232 * to wait for more packets to arive in the transmit ring,
233 * before interrupting the host, after transmitting the
234 * first packet in the ring.
235 *
236 * max_tx_desc=<val> - maximum number of transmit descriptors
237 * (packets) transmitted before interrupting the host.
238 *
239 * max_rx_desc=<val> - maximum number of receive descriptors
240 * (packets) received before interrupting the host.
241 *
242 * tx_ratio=<val> - 7 bit value (0 - 63) specifying the split in 64th
243 * increments of the NIC's on board memory to be used for
244 * transmit and receive buffers. For the 1MB NIC app. 800KB
245 * is available, on the 1/2MB NIC app. 300KB is available.
246 * 68KB will always be available as a minimum for both
247 * directions. The default value is a 50/50 split.
248 * dis_pci_mem_inval=<val> - disable PCI memory write and invalidate
249 * operations, default (1) is to always disable this as
250 * that is what Alteon does on NT. I have not been able
251 * to measure any real performance differences with
252 * this on my systems. Set <val>=0 if you want to
253 * enable these operations.
254 *
255 * If you use more than one NIC, specify the parameters for the
256 * individual NICs with a comma, ie. trace=0,0x00001fff,0 you want to
257 * run tracing on NIC #2 but not on NIC #1 and #3.
258 *
259 * TODO:
260 *
261 * - Proper multicast support.
262 * - NIC dump support.
263 * - More tuning parameters.
264 *
265 * The mini ring is not used under Linux and I am not sure it makes sense
266 * to actually use it.
267 *
268 * New interrupt handler strategy:
269 *
270 * The old interrupt handler worked using the traditional method of
271 * replacing an skbuff with a new one when a packet arrives. However
272 * the rx rings do not need to contain a static number of buffer
273 * descriptors, thus it makes sense to move the memory allocation out
274 * of the main interrupt handler and do it in a bottom half handler
275 * and only allocate new buffers when the number of buffers in the
276 * ring is below a certain threshold. In order to avoid starving the
277 * NIC under heavy load it is however necessary to force allocation
278 * when hitting a minimum threshold. The strategy for alloction is as
279 * follows:
280 *
281 * RX_LOW_BUF_THRES - allocate buffers in the bottom half
282 * RX_PANIC_LOW_THRES - we are very low on buffers, allocate
283 * the buffers in the interrupt handler
284 * RX_RING_THRES - maximum number of buffers in the rx ring
285 * RX_MINI_THRES - maximum number of buffers in the mini ring
286 * RX_JUMBO_THRES - maximum number of buffers in the jumbo ring
287 *
288 * One advantagous side effect of this allocation approach is that the
289 * entire rx processing can be done without holding any spin lock
290 * since the rx rings and registers are totally independent of the tx
291 * ring and its registers. This of course includes the kmalloc's of
292 * new skb's. Thus start_xmit can run in parallel with rx processing
293 * and the memory allocation on SMP systems.
294 *
295 * Note that running the skb reallocation in a bottom half opens up
296 * another can of races which needs to be handled properly. In
297 * particular it can happen that the interrupt handler tries to run
298 * the reallocation while the bottom half is either running on another
299 * CPU or was interrupted on the same CPU. To get around this the
300 * driver uses bitops to prevent the reallocation routines from being
301 * reentered.
302 *
303 * TX handling can also be done without holding any spin lock, wheee
304 * this is fun! since tx_ret_csm is only written to by the interrupt
305 * handler. The case to be aware of is when shutting down the device
306 * and cleaning up where it is necessary to make sure that
307 * start_xmit() is not running while this is happening. Well DaveM
308 * informs me that this case is already protected against ... bye bye
309 * Mr. Spin Lock, it was nice to know you.
310 *
311 * TX interrupts are now partly disabled so the NIC will only generate
312 * TX interrupts for the number of coal ticks, not for the number of
313 * TX packets in the queue. This should reduce the number of TX only,
314 * ie. when no RX processing is done, interrupts seen.
315 */
316
317/*
318 * Threshold values for RX buffer allocation - the low water marks for
319 * when to start refilling the rings are set to 75% of the ring
320 * sizes. It seems to make sense to refill the rings entirely from the
321 * intrrupt handler once it gets below the panic threshold, that way
322 * we don't risk that the refilling is moved to another CPU when the
323 * one running the interrupt handler just got the slab code hot in its
324 * cache.
325 */
326#define RX_RING_SIZE 72
327#define RX_MINI_SIZE 64
328#define RX_JUMBO_SIZE 48
329
330#define RX_PANIC_STD_THRES 16
331#define RX_PANIC_STD_REFILL (3*RX_PANIC_STD_THRES)/2
332#define RX_LOW_STD_THRES (3*RX_RING_SIZE)/4
333#define RX_PANIC_MINI_THRES 12
334#define RX_PANIC_MINI_REFILL (3*RX_PANIC_MINI_THRES)/2
335#define RX_LOW_MINI_THRES (3*RX_MINI_SIZE)/4
336#define RX_PANIC_JUMBO_THRES 6
337#define RX_PANIC_JUMBO_REFILL (3*RX_PANIC_JUMBO_THRES)/2
338#define RX_LOW_JUMBO_THRES (3*RX_JUMBO_SIZE)/4
339
340
341/*
342 * Size of the mini ring entries, basically these just should be big
343 * enough to take TCP ACKs
344 */
345#define ACE_MINI_SIZE 100
346
347#define ACE_MINI_BUFSIZE ACE_MINI_SIZE
348#define ACE_STD_BUFSIZE (ACE_STD_MTU + ETH_HLEN + 4)
349#define ACE_JUMBO_BUFSIZE (ACE_JUMBO_MTU + ETH_HLEN + 4)
350
351/*
352 * There seems to be a magic difference in the effect between 995 and 996
353 * but little difference between 900 and 995 ... no idea why.
354 *
355 * There is now a default set of tuning parameters which is set, depending
356 * on whether or not the user enables Jumbo frames. It's assumed that if
357 * Jumbo frames are enabled, the user wants optimal tuning for that case.
358 */
359#define DEF_TX_COAL 400 /* 996 */
360#define DEF_TX_MAX_DESC 60 /* was 40 */
361#define DEF_RX_COAL 120 /* 1000 */
362#define DEF_RX_MAX_DESC 25
363#define DEF_TX_RATIO 21 /* 24 */
364
365#define DEF_JUMBO_TX_COAL 20
366#define DEF_JUMBO_TX_MAX_DESC 60
367#define DEF_JUMBO_RX_COAL 30
368#define DEF_JUMBO_RX_MAX_DESC 6
369#define DEF_JUMBO_TX_RATIO 21
370
371#if tigon2FwReleaseLocal < 20001118
372/*
373 * Standard firmware and early modifications duplicate
374 * IRQ load without this flag (coal timer is never reset).
375 * Note that with this flag tx_coal should be less than
376 * time to xmit full tx ring.
377 * 400usec is not so bad for tx ring size of 128.
378 */
379#define TX_COAL_INTS_ONLY 1 /* worth it */
380#else
381/*
382 * With modified firmware, this is not necessary, but still useful.
383 */
384#define TX_COAL_INTS_ONLY 1
385#endif
386
387#define DEF_TRACE 0
388#define DEF_STAT (2 * TICKS_PER_SEC)
389
390
391static int link_state[ACE_MAX_MOD_PARMS];
392static int trace[ACE_MAX_MOD_PARMS];
393static int tx_coal_tick[ACE_MAX_MOD_PARMS];
394static int rx_coal_tick[ACE_MAX_MOD_PARMS];
395static int max_tx_desc[ACE_MAX_MOD_PARMS];
396static int max_rx_desc[ACE_MAX_MOD_PARMS];
397static int tx_ratio[ACE_MAX_MOD_PARMS];
398static int dis_pci_mem_inval[ACE_MAX_MOD_PARMS] = {1, 1, 1, 1, 1, 1, 1, 1};
399
400MODULE_AUTHOR("Jes Sorensen <jes@trained-monkey.org>");
401MODULE_LICENSE("GPL");
402MODULE_DESCRIPTION("AceNIC/3C985/GA620 Gigabit Ethernet driver");
403#ifndef CONFIG_ACENIC_OMIT_TIGON_I
404MODULE_FIRMWARE("acenic/tg1.bin");
405#endif
406MODULE_FIRMWARE("acenic/tg2.bin");
407
408module_param_array_named(link, link_state, int, NULL, 0);
409module_param_array(trace, int, NULL, 0);
410module_param_array(tx_coal_tick, int, NULL, 0);
411module_param_array(max_tx_desc, int, NULL, 0);
412module_param_array(rx_coal_tick, int, NULL, 0);
413module_param_array(max_rx_desc, int, NULL, 0);
414module_param_array(tx_ratio, int, NULL, 0);
415MODULE_PARM_DESC(link, "AceNIC/3C985/NetGear link state");
416MODULE_PARM_DESC(trace, "AceNIC/3C985/NetGear firmware trace level");
417MODULE_PARM_DESC(tx_coal_tick, "AceNIC/3C985/GA620 max clock ticks to wait from first tx descriptor arrives");
418MODULE_PARM_DESC(max_tx_desc, "AceNIC/3C985/GA620 max number of transmit descriptors to wait");
419MODULE_PARM_DESC(rx_coal_tick, "AceNIC/3C985/GA620 max clock ticks to wait from first rx descriptor arrives");
420MODULE_PARM_DESC(max_rx_desc, "AceNIC/3C985/GA620 max number of receive descriptors to wait");
421MODULE_PARM_DESC(tx_ratio, "AceNIC/3C985/GA620 ratio of NIC memory used for TX/RX descriptors (range 0-63)");
422
423
424static const char version[] =
425 "acenic.c: v0.92 08/05/2002 Jes Sorensen, linux-acenic@SunSITE.dk\n"
426 " http://home.cern.ch/~jes/gige/acenic.html\n";
427
428static int ace_get_link_ksettings(struct net_device *,
429 struct ethtool_link_ksettings *);
430static int ace_set_link_ksettings(struct net_device *,
431 const struct ethtool_link_ksettings *);
432static void ace_get_drvinfo(struct net_device *, struct ethtool_drvinfo *);
433
434static const struct ethtool_ops ace_ethtool_ops = {
435 .get_drvinfo = ace_get_drvinfo,
436 .get_link_ksettings = ace_get_link_ksettings,
437 .set_link_ksettings = ace_set_link_ksettings,
438};
439
440static void ace_watchdog(struct net_device *dev, unsigned int txqueue);
441
442static const struct net_device_ops ace_netdev_ops = {
443 .ndo_open = ace_open,
444 .ndo_stop = ace_close,
445 .ndo_tx_timeout = ace_watchdog,
446 .ndo_get_stats = ace_get_stats,
447 .ndo_start_xmit = ace_start_xmit,
448 .ndo_set_rx_mode = ace_set_multicast_list,
449 .ndo_validate_addr = eth_validate_addr,
450 .ndo_set_mac_address = ace_set_mac_addr,
451 .ndo_change_mtu = ace_change_mtu,
452};
453
454static int acenic_probe_one(struct pci_dev *pdev,
455 const struct pci_device_id *id)
456{
457 struct net_device *dev;
458 struct ace_private *ap;
459 static int boards_found;
460
461 dev = alloc_etherdev(sizeof(struct ace_private));
462 if (dev == NULL)
463 return -ENOMEM;
464
465 SET_NETDEV_DEV(dev, &pdev->dev);
466
467 ap = netdev_priv(dev);
468 ap->ndev = dev;
469 ap->pdev = pdev;
470 ap->name = pci_name(pdev);
471
472 dev->features |= NETIF_F_SG | NETIF_F_IP_CSUM;
473 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
474
475 dev->watchdog_timeo = 5*HZ;
476 dev->min_mtu = 0;
477 dev->max_mtu = ACE_JUMBO_MTU;
478
479 dev->netdev_ops = &ace_netdev_ops;
480 dev->ethtool_ops = &ace_ethtool_ops;
481
482 /* we only display this string ONCE */
483 if (!boards_found)
484 printk(version);
485
486 if (pci_enable_device(pdev))
487 goto fail_free_netdev;
488
489 /*
490 * Enable master mode before we start playing with the
491 * pci_command word since pci_set_master() will modify
492 * it.
493 */
494 pci_set_master(pdev);
495
496 pci_read_config_word(pdev, PCI_COMMAND, &ap->pci_command);
497
498 /* OpenFirmware on Mac's does not set this - DOH.. */
499 if (!(ap->pci_command & PCI_COMMAND_MEMORY)) {
500 printk(KERN_INFO "%s: Enabling PCI Memory Mapped "
501 "access - was not enabled by BIOS/Firmware\n",
502 ap->name);
503 ap->pci_command = ap->pci_command | PCI_COMMAND_MEMORY;
504 pci_write_config_word(ap->pdev, PCI_COMMAND,
505 ap->pci_command);
506 wmb();
507 }
508
509 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &ap->pci_latency);
510 if (ap->pci_latency <= 0x40) {
511 ap->pci_latency = 0x40;
512 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, ap->pci_latency);
513 }
514
515 /*
516 * Remap the regs into kernel space - this is abuse of
517 * dev->base_addr since it was means for I/O port
518 * addresses but who gives a damn.
519 */
520 dev->base_addr = pci_resource_start(pdev, 0);
521 ap->regs = ioremap(dev->base_addr, 0x4000);
522 if (!ap->regs) {
523 printk(KERN_ERR "%s: Unable to map I/O register, "
524 "AceNIC %i will be disabled.\n",
525 ap->name, boards_found);
526 goto fail_free_netdev;
527 }
528
529 switch(pdev->vendor) {
530 case PCI_VENDOR_ID_ALTEON:
531 if (pdev->device == PCI_DEVICE_ID_FARALLON_PN9100T) {
532 printk(KERN_INFO "%s: Farallon PN9100-T ",
533 ap->name);
534 } else {
535 printk(KERN_INFO "%s: Alteon AceNIC ",
536 ap->name);
537 }
538 break;
539 case PCI_VENDOR_ID_3COM:
540 printk(KERN_INFO "%s: 3Com 3C985 ", ap->name);
541 break;
542 case PCI_VENDOR_ID_NETGEAR:
543 printk(KERN_INFO "%s: NetGear GA620 ", ap->name);
544 break;
545 case PCI_VENDOR_ID_DEC:
546 if (pdev->device == PCI_DEVICE_ID_FARALLON_PN9000SX) {
547 printk(KERN_INFO "%s: Farallon PN9000-SX ",
548 ap->name);
549 break;
550 }
551 fallthrough;
552 case PCI_VENDOR_ID_SGI:
553 printk(KERN_INFO "%s: SGI AceNIC ", ap->name);
554 break;
555 default:
556 printk(KERN_INFO "%s: Unknown AceNIC ", ap->name);
557 break;
558 }
559
560 printk("Gigabit Ethernet at 0x%08lx, ", dev->base_addr);
561 printk("irq %d\n", pdev->irq);
562
563#ifdef CONFIG_ACENIC_OMIT_TIGON_I
564 if ((readl(&ap->regs->HostCtrl) >> 28) == 4) {
565 printk(KERN_ERR "%s: Driver compiled without Tigon I"
566 " support - NIC disabled\n", dev->name);
567 goto fail_uninit;
568 }
569#endif
570
571 if (ace_allocate_descriptors(dev))
572 goto fail_free_netdev;
573
574#ifdef MODULE
575 if (boards_found >= ACE_MAX_MOD_PARMS)
576 ap->board_idx = BOARD_IDX_OVERFLOW;
577 else
578 ap->board_idx = boards_found;
579#else
580 ap->board_idx = BOARD_IDX_STATIC;
581#endif
582
583 if (ace_init(dev))
584 goto fail_free_netdev;
585
586 if (register_netdev(dev)) {
587 printk(KERN_ERR "acenic: device registration failed\n");
588 goto fail_uninit;
589 }
590 ap->name = dev->name;
591
592 dev->features |= NETIF_F_HIGHDMA;
593
594 pci_set_drvdata(pdev, dev);
595
596 boards_found++;
597 return 0;
598
599 fail_uninit:
600 ace_init_cleanup(dev);
601 fail_free_netdev:
602 free_netdev(dev);
603 return -ENODEV;
604}
605
606static void acenic_remove_one(struct pci_dev *pdev)
607{
608 struct net_device *dev = pci_get_drvdata(pdev);
609 struct ace_private *ap = netdev_priv(dev);
610 struct ace_regs __iomem *regs = ap->regs;
611 short i;
612
613 unregister_netdev(dev);
614
615 writel(readl(&regs->CpuCtrl) | CPU_HALT, &regs->CpuCtrl);
616 if (ap->version >= 2)
617 writel(readl(&regs->CpuBCtrl) | CPU_HALT, &regs->CpuBCtrl);
618
619 /*
620 * This clears any pending interrupts
621 */
622 writel(1, &regs->Mb0Lo);
623 readl(&regs->CpuCtrl); /* flush */
624
625 /*
626 * Make sure no other CPUs are processing interrupts
627 * on the card before the buffers are being released.
628 * Otherwise one might experience some `interesting'
629 * effects.
630 *
631 * Then release the RX buffers - jumbo buffers were
632 * already released in ace_close().
633 */
634 ace_sync_irq(dev->irq);
635
636 for (i = 0; i < RX_STD_RING_ENTRIES; i++) {
637 struct sk_buff *skb = ap->skb->rx_std_skbuff[i].skb;
638
639 if (skb) {
640 struct ring_info *ringp;
641 dma_addr_t mapping;
642
643 ringp = &ap->skb->rx_std_skbuff[i];
644 mapping = dma_unmap_addr(ringp, mapping);
645 dma_unmap_page(&ap->pdev->dev, mapping,
646 ACE_STD_BUFSIZE, DMA_FROM_DEVICE);
647
648 ap->rx_std_ring[i].size = 0;
649 ap->skb->rx_std_skbuff[i].skb = NULL;
650 dev_kfree_skb(skb);
651 }
652 }
653
654 if (ap->version >= 2) {
655 for (i = 0; i < RX_MINI_RING_ENTRIES; i++) {
656 struct sk_buff *skb = ap->skb->rx_mini_skbuff[i].skb;
657
658 if (skb) {
659 struct ring_info *ringp;
660 dma_addr_t mapping;
661
662 ringp = &ap->skb->rx_mini_skbuff[i];
663 mapping = dma_unmap_addr(ringp,mapping);
664 dma_unmap_page(&ap->pdev->dev, mapping,
665 ACE_MINI_BUFSIZE,
666 DMA_FROM_DEVICE);
667
668 ap->rx_mini_ring[i].size = 0;
669 ap->skb->rx_mini_skbuff[i].skb = NULL;
670 dev_kfree_skb(skb);
671 }
672 }
673 }
674
675 for (i = 0; i < RX_JUMBO_RING_ENTRIES; i++) {
676 struct sk_buff *skb = ap->skb->rx_jumbo_skbuff[i].skb;
677 if (skb) {
678 struct ring_info *ringp;
679 dma_addr_t mapping;
680
681 ringp = &ap->skb->rx_jumbo_skbuff[i];
682 mapping = dma_unmap_addr(ringp, mapping);
683 dma_unmap_page(&ap->pdev->dev, mapping,
684 ACE_JUMBO_BUFSIZE, DMA_FROM_DEVICE);
685
686 ap->rx_jumbo_ring[i].size = 0;
687 ap->skb->rx_jumbo_skbuff[i].skb = NULL;
688 dev_kfree_skb(skb);
689 }
690 }
691
692 ace_init_cleanup(dev);
693 free_netdev(dev);
694}
695
696static struct pci_driver acenic_pci_driver = {
697 .name = "acenic",
698 .id_table = acenic_pci_tbl,
699 .probe = acenic_probe_one,
700 .remove = acenic_remove_one,
701};
702
703static void ace_free_descriptors(struct net_device *dev)
704{
705 struct ace_private *ap = netdev_priv(dev);
706 int size;
707
708 if (ap->rx_std_ring != NULL) {
709 size = (sizeof(struct rx_desc) *
710 (RX_STD_RING_ENTRIES +
711 RX_JUMBO_RING_ENTRIES +
712 RX_MINI_RING_ENTRIES +
713 RX_RETURN_RING_ENTRIES));
714 dma_free_coherent(&ap->pdev->dev, size, ap->rx_std_ring,
715 ap->rx_ring_base_dma);
716 ap->rx_std_ring = NULL;
717 ap->rx_jumbo_ring = NULL;
718 ap->rx_mini_ring = NULL;
719 ap->rx_return_ring = NULL;
720 }
721 if (ap->evt_ring != NULL) {
722 size = (sizeof(struct event) * EVT_RING_ENTRIES);
723 dma_free_coherent(&ap->pdev->dev, size, ap->evt_ring,
724 ap->evt_ring_dma);
725 ap->evt_ring = NULL;
726 }
727 if (ap->tx_ring != NULL && !ACE_IS_TIGON_I(ap)) {
728 size = (sizeof(struct tx_desc) * MAX_TX_RING_ENTRIES);
729 dma_free_coherent(&ap->pdev->dev, size, ap->tx_ring,
730 ap->tx_ring_dma);
731 }
732 ap->tx_ring = NULL;
733
734 if (ap->evt_prd != NULL) {
735 dma_free_coherent(&ap->pdev->dev, sizeof(u32),
736 (void *)ap->evt_prd, ap->evt_prd_dma);
737 ap->evt_prd = NULL;
738 }
739 if (ap->rx_ret_prd != NULL) {
740 dma_free_coherent(&ap->pdev->dev, sizeof(u32),
741 (void *)ap->rx_ret_prd, ap->rx_ret_prd_dma);
742 ap->rx_ret_prd = NULL;
743 }
744 if (ap->tx_csm != NULL) {
745 dma_free_coherent(&ap->pdev->dev, sizeof(u32),
746 (void *)ap->tx_csm, ap->tx_csm_dma);
747 ap->tx_csm = NULL;
748 }
749}
750
751
752static int ace_allocate_descriptors(struct net_device *dev)
753{
754 struct ace_private *ap = netdev_priv(dev);
755 int size;
756
757 size = (sizeof(struct rx_desc) *
758 (RX_STD_RING_ENTRIES +
759 RX_JUMBO_RING_ENTRIES +
760 RX_MINI_RING_ENTRIES +
761 RX_RETURN_RING_ENTRIES));
762
763 ap->rx_std_ring = dma_alloc_coherent(&ap->pdev->dev, size,
764 &ap->rx_ring_base_dma, GFP_KERNEL);
765 if (ap->rx_std_ring == NULL)
766 goto fail;
767
768 ap->rx_jumbo_ring = ap->rx_std_ring + RX_STD_RING_ENTRIES;
769 ap->rx_mini_ring = ap->rx_jumbo_ring + RX_JUMBO_RING_ENTRIES;
770 ap->rx_return_ring = ap->rx_mini_ring + RX_MINI_RING_ENTRIES;
771
772 size = (sizeof(struct event) * EVT_RING_ENTRIES);
773
774 ap->evt_ring = dma_alloc_coherent(&ap->pdev->dev, size,
775 &ap->evt_ring_dma, GFP_KERNEL);
776
777 if (ap->evt_ring == NULL)
778 goto fail;
779
780 /*
781 * Only allocate a host TX ring for the Tigon II, the Tigon I
782 * has to use PCI registers for this ;-(
783 */
784 if (!ACE_IS_TIGON_I(ap)) {
785 size = (sizeof(struct tx_desc) * MAX_TX_RING_ENTRIES);
786
787 ap->tx_ring = dma_alloc_coherent(&ap->pdev->dev, size,
788 &ap->tx_ring_dma, GFP_KERNEL);
789
790 if (ap->tx_ring == NULL)
791 goto fail;
792 }
793
794 ap->evt_prd = dma_alloc_coherent(&ap->pdev->dev, sizeof(u32),
795 &ap->evt_prd_dma, GFP_KERNEL);
796 if (ap->evt_prd == NULL)
797 goto fail;
798
799 ap->rx_ret_prd = dma_alloc_coherent(&ap->pdev->dev, sizeof(u32),
800 &ap->rx_ret_prd_dma, GFP_KERNEL);
801 if (ap->rx_ret_prd == NULL)
802 goto fail;
803
804 ap->tx_csm = dma_alloc_coherent(&ap->pdev->dev, sizeof(u32),
805 &ap->tx_csm_dma, GFP_KERNEL);
806 if (ap->tx_csm == NULL)
807 goto fail;
808
809 return 0;
810
811fail:
812 /* Clean up. */
813 ace_init_cleanup(dev);
814 return 1;
815}
816
817
818/*
819 * Generic cleanup handling data allocated during init. Used when the
820 * module is unloaded or if an error occurs during initialization
821 */
822static void ace_init_cleanup(struct net_device *dev)
823{
824 struct ace_private *ap;
825
826 ap = netdev_priv(dev);
827
828 ace_free_descriptors(dev);
829
830 if (ap->info)
831 dma_free_coherent(&ap->pdev->dev, sizeof(struct ace_info),
832 ap->info, ap->info_dma);
833 kfree(ap->skb);
834 kfree(ap->trace_buf);
835
836 if (dev->irq)
837 free_irq(dev->irq, dev);
838
839 iounmap(ap->regs);
840}
841
842
843/*
844 * Commands are considered to be slow.
845 */
846static inline void ace_issue_cmd(struct ace_regs __iomem *regs, struct cmd *cmd)
847{
848 u32 idx;
849
850 idx = readl(&regs->CmdPrd);
851
852 writel(*(u32 *)(cmd), &regs->CmdRng[idx]);
853 idx = (idx + 1) % CMD_RING_ENTRIES;
854
855 writel(idx, &regs->CmdPrd);
856}
857
858
859static int ace_init(struct net_device *dev)
860{
861 struct ace_private *ap;
862 struct ace_regs __iomem *regs;
863 struct ace_info *info = NULL;
864 struct pci_dev *pdev;
865 unsigned long myjif;
866 u64 tmp_ptr;
867 u32 tig_ver, mac1, mac2, tmp, pci_state;
868 int board_idx, ecode = 0;
869 short i;
870 unsigned char cache_size;
871 u8 addr[ETH_ALEN];
872
873 ap = netdev_priv(dev);
874 regs = ap->regs;
875
876 board_idx = ap->board_idx;
877
878 /*
879 * aman@sgi.com - its useful to do a NIC reset here to
880 * address the `Firmware not running' problem subsequent
881 * to any crashes involving the NIC
882 */
883 writel(HW_RESET | (HW_RESET << 24), &regs->HostCtrl);
884 readl(&regs->HostCtrl); /* PCI write posting */
885 udelay(5);
886
887 /*
888 * Don't access any other registers before this point!
889 */
890#ifdef __BIG_ENDIAN
891 /*
892 * This will most likely need BYTE_SWAP once we switch
893 * to using __raw_writel()
894 */
895 writel((WORD_SWAP | CLR_INT | ((WORD_SWAP | CLR_INT) << 24)),
896 &regs->HostCtrl);
897#else
898 writel((CLR_INT | WORD_SWAP | ((CLR_INT | WORD_SWAP) << 24)),
899 &regs->HostCtrl);
900#endif
901 readl(&regs->HostCtrl); /* PCI write posting */
902
903 /*
904 * Stop the NIC CPU and clear pending interrupts
905 */
906 writel(readl(&regs->CpuCtrl) | CPU_HALT, &regs->CpuCtrl);
907 readl(&regs->CpuCtrl); /* PCI write posting */
908 writel(0, &regs->Mb0Lo);
909
910 tig_ver = readl(&regs->HostCtrl) >> 28;
911
912 switch(tig_ver){
913#ifndef CONFIG_ACENIC_OMIT_TIGON_I
914 case 4:
915 case 5:
916 printk(KERN_INFO " Tigon I (Rev. %i), Firmware: %i.%i.%i, ",
917 tig_ver, ap->firmware_major, ap->firmware_minor,
918 ap->firmware_fix);
919 writel(0, &regs->LocalCtrl);
920 ap->version = 1;
921 ap->tx_ring_entries = TIGON_I_TX_RING_ENTRIES;
922 break;
923#endif
924 case 6:
925 printk(KERN_INFO " Tigon II (Rev. %i), Firmware: %i.%i.%i, ",
926 tig_ver, ap->firmware_major, ap->firmware_minor,
927 ap->firmware_fix);
928 writel(readl(&regs->CpuBCtrl) | CPU_HALT, &regs->CpuBCtrl);
929 readl(&regs->CpuBCtrl); /* PCI write posting */
930 /*
931 * The SRAM bank size does _not_ indicate the amount
932 * of memory on the card, it controls the _bank_ size!
933 * Ie. a 1MB AceNIC will have two banks of 512KB.
934 */
935 writel(SRAM_BANK_512K, &regs->LocalCtrl);
936 writel(SYNC_SRAM_TIMING, &regs->MiscCfg);
937 ap->version = 2;
938 ap->tx_ring_entries = MAX_TX_RING_ENTRIES;
939 break;
940 default:
941 printk(KERN_WARNING " Unsupported Tigon version detected "
942 "(%i)\n", tig_ver);
943 ecode = -ENODEV;
944 goto init_error;
945 }
946
947 /*
948 * ModeStat _must_ be set after the SRAM settings as this change
949 * seems to corrupt the ModeStat and possible other registers.
950 * The SRAM settings survive resets and setting it to the same
951 * value a second time works as well. This is what caused the
952 * `Firmware not running' problem on the Tigon II.
953 */
954#ifdef __BIG_ENDIAN
955 writel(ACE_BYTE_SWAP_DMA | ACE_WARN | ACE_FATAL | ACE_BYTE_SWAP_BD |
956 ACE_WORD_SWAP_BD | ACE_NO_JUMBO_FRAG, &regs->ModeStat);
957#else
958 writel(ACE_BYTE_SWAP_DMA | ACE_WARN | ACE_FATAL |
959 ACE_WORD_SWAP_BD | ACE_NO_JUMBO_FRAG, &regs->ModeStat);
960#endif
961 readl(&regs->ModeStat); /* PCI write posting */
962
963 mac1 = 0;
964 for(i = 0; i < 4; i++) {
965 int t;
966
967 mac1 = mac1 << 8;
968 t = read_eeprom_byte(dev, 0x8c+i);
969 if (t < 0) {
970 ecode = -EIO;
971 goto init_error;
972 } else
973 mac1 |= (t & 0xff);
974 }
975 mac2 = 0;
976 for(i = 4; i < 8; i++) {
977 int t;
978
979 mac2 = mac2 << 8;
980 t = read_eeprom_byte(dev, 0x8c+i);
981 if (t < 0) {
982 ecode = -EIO;
983 goto init_error;
984 } else
985 mac2 |= (t & 0xff);
986 }
987
988 writel(mac1, &regs->MacAddrHi);
989 writel(mac2, &regs->MacAddrLo);
990
991 addr[0] = (mac1 >> 8) & 0xff;
992 addr[1] = mac1 & 0xff;
993 addr[2] = (mac2 >> 24) & 0xff;
994 addr[3] = (mac2 >> 16) & 0xff;
995 addr[4] = (mac2 >> 8) & 0xff;
996 addr[5] = mac2 & 0xff;
997 eth_hw_addr_set(dev, addr);
998
999 printk("MAC: %pM\n", dev->dev_addr);
1000
1001 /*
1002 * Looks like this is necessary to deal with on all architectures,
1003 * even this %$#%$# N440BX Intel based thing doesn't get it right.
1004 * Ie. having two NICs in the machine, one will have the cache
1005 * line set at boot time, the other will not.
1006 */
1007 pdev = ap->pdev;
1008 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_size);
1009 cache_size <<= 2;
1010 if (cache_size != SMP_CACHE_BYTES) {
1011 printk(KERN_INFO " PCI cache line size set incorrectly "
1012 "(%i bytes) by BIOS/FW, ", cache_size);
1013 if (cache_size > SMP_CACHE_BYTES)
1014 printk("expecting %i\n", SMP_CACHE_BYTES);
1015 else {
1016 printk("correcting to %i\n", SMP_CACHE_BYTES);
1017 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE,
1018 SMP_CACHE_BYTES >> 2);
1019 }
1020 }
1021
1022 pci_state = readl(&regs->PciState);
1023 printk(KERN_INFO " PCI bus width: %i bits, speed: %iMHz, "
1024 "latency: %i clks\n",
1025 (pci_state & PCI_32BIT) ? 32 : 64,
1026 (pci_state & PCI_66MHZ) ? 66 : 33,
1027 ap->pci_latency);
1028
1029 /*
1030 * Set the max DMA transfer size. Seems that for most systems
1031 * the performance is better when no MAX parameter is
1032 * set. However for systems enabling PCI write and invalidate,
1033 * DMA writes must be set to the L1 cache line size to get
1034 * optimal performance.
1035 *
1036 * The default is now to turn the PCI write and invalidate off
1037 * - that is what Alteon does for NT.
1038 */
1039 tmp = READ_CMD_MEM | WRITE_CMD_MEM;
1040 if (ap->version >= 2) {
1041 tmp |= (MEM_READ_MULTIPLE | (pci_state & PCI_66MHZ));
1042 /*
1043 * Tuning parameters only supported for 8 cards
1044 */
1045 if (board_idx == BOARD_IDX_OVERFLOW ||
1046 dis_pci_mem_inval[board_idx]) {
1047 if (ap->pci_command & PCI_COMMAND_INVALIDATE) {
1048 ap->pci_command &= ~PCI_COMMAND_INVALIDATE;
1049 pci_write_config_word(pdev, PCI_COMMAND,
1050 ap->pci_command);
1051 printk(KERN_INFO " Disabling PCI memory "
1052 "write and invalidate\n");
1053 }
1054 } else if (ap->pci_command & PCI_COMMAND_INVALIDATE) {
1055 printk(KERN_INFO " PCI memory write & invalidate "
1056 "enabled by BIOS, enabling counter measures\n");
1057
1058 switch(SMP_CACHE_BYTES) {
1059 case 16:
1060 tmp |= DMA_WRITE_MAX_16;
1061 break;
1062 case 32:
1063 tmp |= DMA_WRITE_MAX_32;
1064 break;
1065 case 64:
1066 tmp |= DMA_WRITE_MAX_64;
1067 break;
1068 case 128:
1069 tmp |= DMA_WRITE_MAX_128;
1070 break;
1071 default:
1072 printk(KERN_INFO " Cache line size %i not "
1073 "supported, PCI write and invalidate "
1074 "disabled\n", SMP_CACHE_BYTES);
1075 ap->pci_command &= ~PCI_COMMAND_INVALIDATE;
1076 pci_write_config_word(pdev, PCI_COMMAND,
1077 ap->pci_command);
1078 }
1079 }
1080 }
1081
1082#ifdef __sparc__
1083 /*
1084 * On this platform, we know what the best dma settings
1085 * are. We use 64-byte maximum bursts, because if we
1086 * burst larger than the cache line size (or even cross
1087 * a 64byte boundary in a single burst) the UltraSparc
1088 * PCI controller will disconnect at 64-byte multiples.
1089 *
1090 * Read-multiple will be properly enabled above, and when
1091 * set will give the PCI controller proper hints about
1092 * prefetching.
1093 */
1094 tmp &= ~DMA_READ_WRITE_MASK;
1095 tmp |= DMA_READ_MAX_64;
1096 tmp |= DMA_WRITE_MAX_64;
1097#endif
1098#ifdef __alpha__
1099 tmp &= ~DMA_READ_WRITE_MASK;
1100 tmp |= DMA_READ_MAX_128;
1101 /*
1102 * All the docs say MUST NOT. Well, I did.
1103 * Nothing terrible happens, if we load wrong size.
1104 * Bit w&i still works better!
1105 */
1106 tmp |= DMA_WRITE_MAX_128;
1107#endif
1108 writel(tmp, &regs->PciState);
1109
1110#if 0
1111 /*
1112 * The Host PCI bus controller driver has to set FBB.
1113 * If all devices on that PCI bus support FBB, then the controller
1114 * can enable FBB support in the Host PCI Bus controller (or on
1115 * the PCI-PCI bridge if that applies).
1116 * -ggg
1117 */
1118 /*
1119 * I have received reports from people having problems when this
1120 * bit is enabled.
1121 */
1122 if (!(ap->pci_command & PCI_COMMAND_FAST_BACK)) {
1123 printk(KERN_INFO " Enabling PCI Fast Back to Back\n");
1124 ap->pci_command |= PCI_COMMAND_FAST_BACK;
1125 pci_write_config_word(pdev, PCI_COMMAND, ap->pci_command);
1126 }
1127#endif
1128
1129 /*
1130 * Configure DMA attributes.
1131 */
1132 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
1133 ecode = -ENODEV;
1134 goto init_error;
1135 }
1136
1137 /*
1138 * Initialize the generic info block and the command+event rings
1139 * and the control blocks for the transmit and receive rings
1140 * as they need to be setup once and for all.
1141 */
1142 if (!(info = dma_alloc_coherent(&ap->pdev->dev, sizeof(struct ace_info),
1143 &ap->info_dma, GFP_KERNEL))) {
1144 ecode = -EAGAIN;
1145 goto init_error;
1146 }
1147 ap->info = info;
1148
1149 /*
1150 * Get the memory for the skb rings.
1151 */
1152 if (!(ap->skb = kzalloc(sizeof(struct ace_skb), GFP_KERNEL))) {
1153 ecode = -EAGAIN;
1154 goto init_error;
1155 }
1156
1157 ecode = request_irq(pdev->irq, ace_interrupt, IRQF_SHARED,
1158 DRV_NAME, dev);
1159 if (ecode) {
1160 printk(KERN_WARNING "%s: Requested IRQ %d is busy\n",
1161 DRV_NAME, pdev->irq);
1162 goto init_error;
1163 } else
1164 dev->irq = pdev->irq;
1165
1166#ifdef INDEX_DEBUG
1167 spin_lock_init(&ap->debug_lock);
1168 ap->last_tx = ACE_TX_RING_ENTRIES(ap) - 1;
1169 ap->last_std_rx = 0;
1170 ap->last_mini_rx = 0;
1171#endif
1172
1173 ecode = ace_load_firmware(dev);
1174 if (ecode)
1175 goto init_error;
1176
1177 ap->fw_running = 0;
1178
1179 tmp_ptr = ap->info_dma;
1180 writel(tmp_ptr >> 32, &regs->InfoPtrHi);
1181 writel(tmp_ptr & 0xffffffff, &regs->InfoPtrLo);
1182
1183 memset(ap->evt_ring, 0, EVT_RING_ENTRIES * sizeof(struct event));
1184
1185 set_aceaddr(&info->evt_ctrl.rngptr, ap->evt_ring_dma);
1186 info->evt_ctrl.flags = 0;
1187
1188 *(ap->evt_prd) = 0;
1189 wmb();
1190 set_aceaddr(&info->evt_prd_ptr, ap->evt_prd_dma);
1191 writel(0, &regs->EvtCsm);
1192
1193 set_aceaddr(&info->cmd_ctrl.rngptr, 0x100);
1194 info->cmd_ctrl.flags = 0;
1195 info->cmd_ctrl.max_len = 0;
1196
1197 for (i = 0; i < CMD_RING_ENTRIES; i++)
1198 writel(0, &regs->CmdRng[i]);
1199
1200 writel(0, &regs->CmdPrd);
1201 writel(0, &regs->CmdCsm);
1202
1203 tmp_ptr = ap->info_dma;
1204 tmp_ptr += (unsigned long) &(((struct ace_info *)0)->s.stats);
1205 set_aceaddr(&info->stats2_ptr, (dma_addr_t) tmp_ptr);
1206
1207 set_aceaddr(&info->rx_std_ctrl.rngptr, ap->rx_ring_base_dma);
1208 info->rx_std_ctrl.max_len = ACE_STD_BUFSIZE;
1209 info->rx_std_ctrl.flags =
1210 RCB_FLG_TCP_UDP_SUM | RCB_FLG_NO_PSEUDO_HDR | RCB_FLG_VLAN_ASSIST;
1211
1212 memset(ap->rx_std_ring, 0,
1213 RX_STD_RING_ENTRIES * sizeof(struct rx_desc));
1214
1215 for (i = 0; i < RX_STD_RING_ENTRIES; i++)
1216 ap->rx_std_ring[i].flags = BD_FLG_TCP_UDP_SUM;
1217
1218 ap->rx_std_skbprd = 0;
1219 atomic_set(&ap->cur_rx_bufs, 0);
1220
1221 set_aceaddr(&info->rx_jumbo_ctrl.rngptr,
1222 (ap->rx_ring_base_dma +
1223 (sizeof(struct rx_desc) * RX_STD_RING_ENTRIES)));
1224 info->rx_jumbo_ctrl.max_len = 0;
1225 info->rx_jumbo_ctrl.flags =
1226 RCB_FLG_TCP_UDP_SUM | RCB_FLG_NO_PSEUDO_HDR | RCB_FLG_VLAN_ASSIST;
1227
1228 memset(ap->rx_jumbo_ring, 0,
1229 RX_JUMBO_RING_ENTRIES * sizeof(struct rx_desc));
1230
1231 for (i = 0; i < RX_JUMBO_RING_ENTRIES; i++)
1232 ap->rx_jumbo_ring[i].flags = BD_FLG_TCP_UDP_SUM | BD_FLG_JUMBO;
1233
1234 ap->rx_jumbo_skbprd = 0;
1235 atomic_set(&ap->cur_jumbo_bufs, 0);
1236
1237 memset(ap->rx_mini_ring, 0,
1238 RX_MINI_RING_ENTRIES * sizeof(struct rx_desc));
1239
1240 if (ap->version >= 2) {
1241 set_aceaddr(&info->rx_mini_ctrl.rngptr,
1242 (ap->rx_ring_base_dma +
1243 (sizeof(struct rx_desc) *
1244 (RX_STD_RING_ENTRIES +
1245 RX_JUMBO_RING_ENTRIES))));
1246 info->rx_mini_ctrl.max_len = ACE_MINI_SIZE;
1247 info->rx_mini_ctrl.flags =
1248 RCB_FLG_TCP_UDP_SUM|RCB_FLG_NO_PSEUDO_HDR|RCB_FLG_VLAN_ASSIST;
1249
1250 for (i = 0; i < RX_MINI_RING_ENTRIES; i++)
1251 ap->rx_mini_ring[i].flags =
1252 BD_FLG_TCP_UDP_SUM | BD_FLG_MINI;
1253 } else {
1254 set_aceaddr(&info->rx_mini_ctrl.rngptr, 0);
1255 info->rx_mini_ctrl.flags = RCB_FLG_RNG_DISABLE;
1256 info->rx_mini_ctrl.max_len = 0;
1257 }
1258
1259 ap->rx_mini_skbprd = 0;
1260 atomic_set(&ap->cur_mini_bufs, 0);
1261
1262 set_aceaddr(&info->rx_return_ctrl.rngptr,
1263 (ap->rx_ring_base_dma +
1264 (sizeof(struct rx_desc) *
1265 (RX_STD_RING_ENTRIES +
1266 RX_JUMBO_RING_ENTRIES +
1267 RX_MINI_RING_ENTRIES))));
1268 info->rx_return_ctrl.flags = 0;
1269 info->rx_return_ctrl.max_len = RX_RETURN_RING_ENTRIES;
1270
1271 memset(ap->rx_return_ring, 0,
1272 RX_RETURN_RING_ENTRIES * sizeof(struct rx_desc));
1273
1274 set_aceaddr(&info->rx_ret_prd_ptr, ap->rx_ret_prd_dma);
1275 *(ap->rx_ret_prd) = 0;
1276
1277 writel(TX_RING_BASE, &regs->WinBase);
1278
1279 if (ACE_IS_TIGON_I(ap)) {
1280 ap->tx_ring = (__force struct tx_desc *) regs->Window;
1281 for (i = 0; i < (TIGON_I_TX_RING_ENTRIES
1282 * sizeof(struct tx_desc)) / sizeof(u32); i++)
1283 writel(0, (__force void __iomem *)ap->tx_ring + i * 4);
1284
1285 set_aceaddr(&info->tx_ctrl.rngptr, TX_RING_BASE);
1286 } else {
1287 memset(ap->tx_ring, 0,
1288 MAX_TX_RING_ENTRIES * sizeof(struct tx_desc));
1289
1290 set_aceaddr(&info->tx_ctrl.rngptr, ap->tx_ring_dma);
1291 }
1292
1293 info->tx_ctrl.max_len = ACE_TX_RING_ENTRIES(ap);
1294 tmp = RCB_FLG_TCP_UDP_SUM | RCB_FLG_NO_PSEUDO_HDR | RCB_FLG_VLAN_ASSIST;
1295
1296 /*
1297 * The Tigon I does not like having the TX ring in host memory ;-(
1298 */
1299 if (!ACE_IS_TIGON_I(ap))
1300 tmp |= RCB_FLG_TX_HOST_RING;
1301#if TX_COAL_INTS_ONLY
1302 tmp |= RCB_FLG_COAL_INT_ONLY;
1303#endif
1304 info->tx_ctrl.flags = tmp;
1305
1306 set_aceaddr(&info->tx_csm_ptr, ap->tx_csm_dma);
1307
1308 /*
1309 * Potential item for tuning parameter
1310 */
1311#if 0 /* NO */
1312 writel(DMA_THRESH_16W, &regs->DmaReadCfg);
1313 writel(DMA_THRESH_16W, &regs->DmaWriteCfg);
1314#else
1315 writel(DMA_THRESH_8W, &regs->DmaReadCfg);
1316 writel(DMA_THRESH_8W, &regs->DmaWriteCfg);
1317#endif
1318
1319 writel(0, &regs->MaskInt);
1320 writel(1, &regs->IfIdx);
1321#if 0
1322 /*
1323 * McKinley boxes do not like us fiddling with AssistState
1324 * this early
1325 */
1326 writel(1, &regs->AssistState);
1327#endif
1328
1329 writel(DEF_STAT, &regs->TuneStatTicks);
1330 writel(DEF_TRACE, &regs->TuneTrace);
1331
1332 ace_set_rxtx_parms(dev, 0);
1333
1334 if (board_idx == BOARD_IDX_OVERFLOW) {
1335 printk(KERN_WARNING "%s: more than %i NICs detected, "
1336 "ignoring module parameters!\n",
1337 ap->name, ACE_MAX_MOD_PARMS);
1338 } else if (board_idx >= 0) {
1339 if (tx_coal_tick[board_idx])
1340 writel(tx_coal_tick[board_idx],
1341 &regs->TuneTxCoalTicks);
1342 if (max_tx_desc[board_idx])
1343 writel(max_tx_desc[board_idx], &regs->TuneMaxTxDesc);
1344
1345 if (rx_coal_tick[board_idx])
1346 writel(rx_coal_tick[board_idx],
1347 &regs->TuneRxCoalTicks);
1348 if (max_rx_desc[board_idx])
1349 writel(max_rx_desc[board_idx], &regs->TuneMaxRxDesc);
1350
1351 if (trace[board_idx])
1352 writel(trace[board_idx], &regs->TuneTrace);
1353
1354 if ((tx_ratio[board_idx] > 0) && (tx_ratio[board_idx] < 64))
1355 writel(tx_ratio[board_idx], &regs->TxBufRat);
1356 }
1357
1358 /*
1359 * Default link parameters
1360 */
1361 tmp = LNK_ENABLE | LNK_FULL_DUPLEX | LNK_1000MB | LNK_100MB |
1362 LNK_10MB | LNK_RX_FLOW_CTL_Y | LNK_NEG_FCTL | LNK_NEGOTIATE;
1363 if(ap->version >= 2)
1364 tmp |= LNK_TX_FLOW_CTL_Y;
1365
1366 /*
1367 * Override link default parameters
1368 */
1369 if ((board_idx >= 0) && link_state[board_idx]) {
1370 int option = link_state[board_idx];
1371
1372 tmp = LNK_ENABLE;
1373
1374 if (option & 0x01) {
1375 printk(KERN_INFO "%s: Setting half duplex link\n",
1376 ap->name);
1377 tmp &= ~LNK_FULL_DUPLEX;
1378 }
1379 if (option & 0x02)
1380 tmp &= ~LNK_NEGOTIATE;
1381 if (option & 0x10)
1382 tmp |= LNK_10MB;
1383 if (option & 0x20)
1384 tmp |= LNK_100MB;
1385 if (option & 0x40)
1386 tmp |= LNK_1000MB;
1387 if ((option & 0x70) == 0) {
1388 printk(KERN_WARNING "%s: No media speed specified, "
1389 "forcing auto negotiation\n", ap->name);
1390 tmp |= LNK_NEGOTIATE | LNK_1000MB |
1391 LNK_100MB | LNK_10MB;
1392 }
1393 if ((option & 0x100) == 0)
1394 tmp |= LNK_NEG_FCTL;
1395 else
1396 printk(KERN_INFO "%s: Disabling flow control "
1397 "negotiation\n", ap->name);
1398 if (option & 0x200)
1399 tmp |= LNK_RX_FLOW_CTL_Y;
1400 if ((option & 0x400) && (ap->version >= 2)) {
1401 printk(KERN_INFO "%s: Enabling TX flow control\n",
1402 ap->name);
1403 tmp |= LNK_TX_FLOW_CTL_Y;
1404 }
1405 }
1406
1407 ap->link = tmp;
1408 writel(tmp, &regs->TuneLink);
1409 if (ap->version >= 2)
1410 writel(tmp, &regs->TuneFastLink);
1411
1412 writel(ap->firmware_start, &regs->Pc);
1413
1414 writel(0, &regs->Mb0Lo);
1415
1416 /*
1417 * Set tx_csm before we start receiving interrupts, otherwise
1418 * the interrupt handler might think it is supposed to process
1419 * tx ints before we are up and running, which may cause a null
1420 * pointer access in the int handler.
1421 */
1422 ap->cur_rx = 0;
1423 ap->tx_prd = *(ap->tx_csm) = ap->tx_ret_csm = 0;
1424
1425 wmb();
1426 ace_set_txprd(regs, ap, 0);
1427 writel(0, &regs->RxRetCsm);
1428
1429 /*
1430 * Enable DMA engine now.
1431 * If we do this sooner, Mckinley box pukes.
1432 * I assume it's because Tigon II DMA engine wants to check
1433 * *something* even before the CPU is started.
1434 */
1435 writel(1, &regs->AssistState); /* enable DMA */
1436
1437 /*
1438 * Start the NIC CPU
1439 */
1440 writel(readl(&regs->CpuCtrl) & ~(CPU_HALT|CPU_TRACE), &regs->CpuCtrl);
1441 readl(&regs->CpuCtrl);
1442
1443 /*
1444 * Wait for the firmware to spin up - max 3 seconds.
1445 */
1446 myjif = jiffies + 3 * HZ;
1447 while (time_before(jiffies, myjif) && !ap->fw_running)
1448 cpu_relax();
1449
1450 if (!ap->fw_running) {
1451 printk(KERN_ERR "%s: Firmware NOT running!\n", ap->name);
1452
1453 ace_dump_trace(ap);
1454 writel(readl(&regs->CpuCtrl) | CPU_HALT, &regs->CpuCtrl);
1455 readl(&regs->CpuCtrl);
1456
1457 /* aman@sgi.com - account for badly behaving firmware/NIC:
1458 * - have observed that the NIC may continue to generate
1459 * interrupts for some reason; attempt to stop it - halt
1460 * second CPU for Tigon II cards, and also clear Mb0
1461 * - if we're a module, we'll fail to load if this was
1462 * the only GbE card in the system => if the kernel does
1463 * see an interrupt from the NIC, code to handle it is
1464 * gone and OOps! - so free_irq also
1465 */
1466 if (ap->version >= 2)
1467 writel(readl(&regs->CpuBCtrl) | CPU_HALT,
1468 &regs->CpuBCtrl);
1469 writel(0, &regs->Mb0Lo);
1470 readl(&regs->Mb0Lo);
1471
1472 ecode = -EBUSY;
1473 goto init_error;
1474 }
1475
1476 /*
1477 * We load the ring here as there seem to be no way to tell the
1478 * firmware to wipe the ring without re-initializing it.
1479 */
1480 if (!test_and_set_bit(0, &ap->std_refill_busy))
1481 ace_load_std_rx_ring(dev, RX_RING_SIZE);
1482 else
1483 printk(KERN_ERR "%s: Someone is busy refilling the RX ring\n",
1484 ap->name);
1485 if (ap->version >= 2) {
1486 if (!test_and_set_bit(0, &ap->mini_refill_busy))
1487 ace_load_mini_rx_ring(dev, RX_MINI_SIZE);
1488 else
1489 printk(KERN_ERR "%s: Someone is busy refilling "
1490 "the RX mini ring\n", ap->name);
1491 }
1492 return 0;
1493
1494 init_error:
1495 ace_init_cleanup(dev);
1496 return ecode;
1497}
1498
1499
1500static void ace_set_rxtx_parms(struct net_device *dev, int jumbo)
1501{
1502 struct ace_private *ap = netdev_priv(dev);
1503 struct ace_regs __iomem *regs = ap->regs;
1504 int board_idx = ap->board_idx;
1505
1506 if (board_idx >= 0) {
1507 if (!jumbo) {
1508 if (!tx_coal_tick[board_idx])
1509 writel(DEF_TX_COAL, &regs->TuneTxCoalTicks);
1510 if (!max_tx_desc[board_idx])
1511 writel(DEF_TX_MAX_DESC, &regs->TuneMaxTxDesc);
1512 if (!rx_coal_tick[board_idx])
1513 writel(DEF_RX_COAL, &regs->TuneRxCoalTicks);
1514 if (!max_rx_desc[board_idx])
1515 writel(DEF_RX_MAX_DESC, &regs->TuneMaxRxDesc);
1516 if (!tx_ratio[board_idx])
1517 writel(DEF_TX_RATIO, &regs->TxBufRat);
1518 } else {
1519 if (!tx_coal_tick[board_idx])
1520 writel(DEF_JUMBO_TX_COAL,
1521 &regs->TuneTxCoalTicks);
1522 if (!max_tx_desc[board_idx])
1523 writel(DEF_JUMBO_TX_MAX_DESC,
1524 &regs->TuneMaxTxDesc);
1525 if (!rx_coal_tick[board_idx])
1526 writel(DEF_JUMBO_RX_COAL,
1527 &regs->TuneRxCoalTicks);
1528 if (!max_rx_desc[board_idx])
1529 writel(DEF_JUMBO_RX_MAX_DESC,
1530 &regs->TuneMaxRxDesc);
1531 if (!tx_ratio[board_idx])
1532 writel(DEF_JUMBO_TX_RATIO, &regs->TxBufRat);
1533 }
1534 }
1535}
1536
1537
1538static void ace_watchdog(struct net_device *data, unsigned int txqueue)
1539{
1540 struct net_device *dev = data;
1541 struct ace_private *ap = netdev_priv(dev);
1542 struct ace_regs __iomem *regs = ap->regs;
1543
1544 /*
1545 * We haven't received a stats update event for more than 2.5
1546 * seconds and there is data in the transmit queue, thus we
1547 * assume the card is stuck.
1548 */
1549 if (*ap->tx_csm != ap->tx_ret_csm) {
1550 printk(KERN_WARNING "%s: Transmitter is stuck, %08x\n",
1551 dev->name, (unsigned int)readl(&regs->HostCtrl));
1552 /* This can happen due to ieee flow control. */
1553 } else {
1554 printk(KERN_DEBUG "%s: BUG... transmitter died. Kicking it.\n",
1555 dev->name);
1556#if 0
1557 netif_wake_queue(dev);
1558#endif
1559 }
1560}
1561
1562
1563static void ace_tasklet(struct tasklet_struct *t)
1564{
1565 struct ace_private *ap = from_tasklet(ap, t, ace_tasklet);
1566 struct net_device *dev = ap->ndev;
1567 int cur_size;
1568
1569 cur_size = atomic_read(&ap->cur_rx_bufs);
1570 if ((cur_size < RX_LOW_STD_THRES) &&
1571 !test_and_set_bit(0, &ap->std_refill_busy)) {
1572#ifdef DEBUG
1573 printk("refilling buffers (current %i)\n", cur_size);
1574#endif
1575 ace_load_std_rx_ring(dev, RX_RING_SIZE - cur_size);
1576 }
1577
1578 if (ap->version >= 2) {
1579 cur_size = atomic_read(&ap->cur_mini_bufs);
1580 if ((cur_size < RX_LOW_MINI_THRES) &&
1581 !test_and_set_bit(0, &ap->mini_refill_busy)) {
1582#ifdef DEBUG
1583 printk("refilling mini buffers (current %i)\n",
1584 cur_size);
1585#endif
1586 ace_load_mini_rx_ring(dev, RX_MINI_SIZE - cur_size);
1587 }
1588 }
1589
1590 cur_size = atomic_read(&ap->cur_jumbo_bufs);
1591 if (ap->jumbo && (cur_size < RX_LOW_JUMBO_THRES) &&
1592 !test_and_set_bit(0, &ap->jumbo_refill_busy)) {
1593#ifdef DEBUG
1594 printk("refilling jumbo buffers (current %i)\n", cur_size);
1595#endif
1596 ace_load_jumbo_rx_ring(dev, RX_JUMBO_SIZE - cur_size);
1597 }
1598 ap->tasklet_pending = 0;
1599}
1600
1601
1602/*
1603 * Copy the contents of the NIC's trace buffer to kernel memory.
1604 */
1605static void ace_dump_trace(struct ace_private *ap)
1606{
1607#if 0
1608 if (!ap->trace_buf)
1609 if (!(ap->trace_buf = kmalloc(ACE_TRACE_SIZE, GFP_KERNEL)))
1610 return;
1611#endif
1612}
1613
1614
1615/*
1616 * Load the standard rx ring.
1617 *
1618 * Loading rings is safe without holding the spin lock since this is
1619 * done only before the device is enabled, thus no interrupts are
1620 * generated and by the interrupt handler/tasklet handler.
1621 */
1622static void ace_load_std_rx_ring(struct net_device *dev, int nr_bufs)
1623{
1624 struct ace_private *ap = netdev_priv(dev);
1625 struct ace_regs __iomem *regs = ap->regs;
1626 short i, idx;
1627
1628
1629 prefetchw(&ap->cur_rx_bufs);
1630
1631 idx = ap->rx_std_skbprd;
1632
1633 for (i = 0; i < nr_bufs; i++) {
1634 struct sk_buff *skb;
1635 struct rx_desc *rd;
1636 dma_addr_t mapping;
1637
1638 skb = netdev_alloc_skb_ip_align(dev, ACE_STD_BUFSIZE);
1639 if (!skb)
1640 break;
1641
1642 mapping = dma_map_page(&ap->pdev->dev,
1643 virt_to_page(skb->data),
1644 offset_in_page(skb->data),
1645 ACE_STD_BUFSIZE, DMA_FROM_DEVICE);
1646 ap->skb->rx_std_skbuff[idx].skb = skb;
1647 dma_unmap_addr_set(&ap->skb->rx_std_skbuff[idx],
1648 mapping, mapping);
1649
1650 rd = &ap->rx_std_ring[idx];
1651 set_aceaddr(&rd->addr, mapping);
1652 rd->size = ACE_STD_BUFSIZE;
1653 rd->idx = idx;
1654 idx = (idx + 1) % RX_STD_RING_ENTRIES;
1655 }
1656
1657 if (!i)
1658 goto error_out;
1659
1660 atomic_add(i, &ap->cur_rx_bufs);
1661 ap->rx_std_skbprd = idx;
1662
1663 if (ACE_IS_TIGON_I(ap)) {
1664 struct cmd cmd;
1665 cmd.evt = C_SET_RX_PRD_IDX;
1666 cmd.code = 0;
1667 cmd.idx = ap->rx_std_skbprd;
1668 ace_issue_cmd(regs, &cmd);
1669 } else {
1670 writel(idx, &regs->RxStdPrd);
1671 wmb();
1672 }
1673
1674 out:
1675 clear_bit(0, &ap->std_refill_busy);
1676 return;
1677
1678 error_out:
1679 printk(KERN_INFO "Out of memory when allocating "
1680 "standard receive buffers\n");
1681 goto out;
1682}
1683
1684
1685static void ace_load_mini_rx_ring(struct net_device *dev, int nr_bufs)
1686{
1687 struct ace_private *ap = netdev_priv(dev);
1688 struct ace_regs __iomem *regs = ap->regs;
1689 short i, idx;
1690
1691 prefetchw(&ap->cur_mini_bufs);
1692
1693 idx = ap->rx_mini_skbprd;
1694 for (i = 0; i < nr_bufs; i++) {
1695 struct sk_buff *skb;
1696 struct rx_desc *rd;
1697 dma_addr_t mapping;
1698
1699 skb = netdev_alloc_skb_ip_align(dev, ACE_MINI_BUFSIZE);
1700 if (!skb)
1701 break;
1702
1703 mapping = dma_map_page(&ap->pdev->dev,
1704 virt_to_page(skb->data),
1705 offset_in_page(skb->data),
1706 ACE_MINI_BUFSIZE, DMA_FROM_DEVICE);
1707 ap->skb->rx_mini_skbuff[idx].skb = skb;
1708 dma_unmap_addr_set(&ap->skb->rx_mini_skbuff[idx],
1709 mapping, mapping);
1710
1711 rd = &ap->rx_mini_ring[idx];
1712 set_aceaddr(&rd->addr, mapping);
1713 rd->size = ACE_MINI_BUFSIZE;
1714 rd->idx = idx;
1715 idx = (idx + 1) % RX_MINI_RING_ENTRIES;
1716 }
1717
1718 if (!i)
1719 goto error_out;
1720
1721 atomic_add(i, &ap->cur_mini_bufs);
1722
1723 ap->rx_mini_skbprd = idx;
1724
1725 writel(idx, &regs->RxMiniPrd);
1726 wmb();
1727
1728 out:
1729 clear_bit(0, &ap->mini_refill_busy);
1730 return;
1731 error_out:
1732 printk(KERN_INFO "Out of memory when allocating "
1733 "mini receive buffers\n");
1734 goto out;
1735}
1736
1737
1738/*
1739 * Load the jumbo rx ring, this may happen at any time if the MTU
1740 * is changed to a value > 1500.
1741 */
1742static void ace_load_jumbo_rx_ring(struct net_device *dev, int nr_bufs)
1743{
1744 struct ace_private *ap = netdev_priv(dev);
1745 struct ace_regs __iomem *regs = ap->regs;
1746 short i, idx;
1747
1748 idx = ap->rx_jumbo_skbprd;
1749
1750 for (i = 0; i < nr_bufs; i++) {
1751 struct sk_buff *skb;
1752 struct rx_desc *rd;
1753 dma_addr_t mapping;
1754
1755 skb = netdev_alloc_skb_ip_align(dev, ACE_JUMBO_BUFSIZE);
1756 if (!skb)
1757 break;
1758
1759 mapping = dma_map_page(&ap->pdev->dev,
1760 virt_to_page(skb->data),
1761 offset_in_page(skb->data),
1762 ACE_JUMBO_BUFSIZE, DMA_FROM_DEVICE);
1763 ap->skb->rx_jumbo_skbuff[idx].skb = skb;
1764 dma_unmap_addr_set(&ap->skb->rx_jumbo_skbuff[idx],
1765 mapping, mapping);
1766
1767 rd = &ap->rx_jumbo_ring[idx];
1768 set_aceaddr(&rd->addr, mapping);
1769 rd->size = ACE_JUMBO_BUFSIZE;
1770 rd->idx = idx;
1771 idx = (idx + 1) % RX_JUMBO_RING_ENTRIES;
1772 }
1773
1774 if (!i)
1775 goto error_out;
1776
1777 atomic_add(i, &ap->cur_jumbo_bufs);
1778 ap->rx_jumbo_skbprd = idx;
1779
1780 if (ACE_IS_TIGON_I(ap)) {
1781 struct cmd cmd;
1782 cmd.evt = C_SET_RX_JUMBO_PRD_IDX;
1783 cmd.code = 0;
1784 cmd.idx = ap->rx_jumbo_skbprd;
1785 ace_issue_cmd(regs, &cmd);
1786 } else {
1787 writel(idx, &regs->RxJumboPrd);
1788 wmb();
1789 }
1790
1791 out:
1792 clear_bit(0, &ap->jumbo_refill_busy);
1793 return;
1794 error_out:
1795 if (net_ratelimit())
1796 printk(KERN_INFO "Out of memory when allocating "
1797 "jumbo receive buffers\n");
1798 goto out;
1799}
1800
1801
1802/*
1803 * All events are considered to be slow (RX/TX ints do not generate
1804 * events) and are handled here, outside the main interrupt handler,
1805 * to reduce the size of the handler.
1806 */
1807static u32 ace_handle_event(struct net_device *dev, u32 evtcsm, u32 evtprd)
1808{
1809 struct ace_private *ap;
1810
1811 ap = netdev_priv(dev);
1812
1813 while (evtcsm != evtprd) {
1814 switch (ap->evt_ring[evtcsm].evt) {
1815 case E_FW_RUNNING:
1816 printk(KERN_INFO "%s: Firmware up and running\n",
1817 ap->name);
1818 ap->fw_running = 1;
1819 wmb();
1820 break;
1821 case E_STATS_UPDATED:
1822 break;
1823 case E_LNK_STATE:
1824 {
1825 u16 code = ap->evt_ring[evtcsm].code;
1826 switch (code) {
1827 case E_C_LINK_UP:
1828 {
1829 u32 state = readl(&ap->regs->GigLnkState);
1830 printk(KERN_WARNING "%s: Optical link UP "
1831 "(%s Duplex, Flow Control: %s%s)\n",
1832 ap->name,
1833 state & LNK_FULL_DUPLEX ? "Full":"Half",
1834 state & LNK_TX_FLOW_CTL_Y ? "TX " : "",
1835 state & LNK_RX_FLOW_CTL_Y ? "RX" : "");
1836 break;
1837 }
1838 case E_C_LINK_DOWN:
1839 printk(KERN_WARNING "%s: Optical link DOWN\n",
1840 ap->name);
1841 break;
1842 case E_C_LINK_10_100:
1843 printk(KERN_WARNING "%s: 10/100BaseT link "
1844 "UP\n", ap->name);
1845 break;
1846 default:
1847 printk(KERN_ERR "%s: Unknown optical link "
1848 "state %02x\n", ap->name, code);
1849 }
1850 break;
1851 }
1852 case E_ERROR:
1853 switch(ap->evt_ring[evtcsm].code) {
1854 case E_C_ERR_INVAL_CMD:
1855 printk(KERN_ERR "%s: invalid command error\n",
1856 ap->name);
1857 break;
1858 case E_C_ERR_UNIMP_CMD:
1859 printk(KERN_ERR "%s: unimplemented command "
1860 "error\n", ap->name);
1861 break;
1862 case E_C_ERR_BAD_CFG:
1863 printk(KERN_ERR "%s: bad config error\n",
1864 ap->name);
1865 break;
1866 default:
1867 printk(KERN_ERR "%s: unknown error %02x\n",
1868 ap->name, ap->evt_ring[evtcsm].code);
1869 }
1870 break;
1871 case E_RESET_JUMBO_RNG:
1872 {
1873 int i;
1874 for (i = 0; i < RX_JUMBO_RING_ENTRIES; i++) {
1875 if (ap->skb->rx_jumbo_skbuff[i].skb) {
1876 ap->rx_jumbo_ring[i].size = 0;
1877 set_aceaddr(&ap->rx_jumbo_ring[i].addr, 0);
1878 dev_kfree_skb(ap->skb->rx_jumbo_skbuff[i].skb);
1879 ap->skb->rx_jumbo_skbuff[i].skb = NULL;
1880 }
1881 }
1882
1883 if (ACE_IS_TIGON_I(ap)) {
1884 struct cmd cmd;
1885 cmd.evt = C_SET_RX_JUMBO_PRD_IDX;
1886 cmd.code = 0;
1887 cmd.idx = 0;
1888 ace_issue_cmd(ap->regs, &cmd);
1889 } else {
1890 writel(0, &((ap->regs)->RxJumboPrd));
1891 wmb();
1892 }
1893
1894 ap->jumbo = 0;
1895 ap->rx_jumbo_skbprd = 0;
1896 printk(KERN_INFO "%s: Jumbo ring flushed\n",
1897 ap->name);
1898 clear_bit(0, &ap->jumbo_refill_busy);
1899 break;
1900 }
1901 default:
1902 printk(KERN_ERR "%s: Unhandled event 0x%02x\n",
1903 ap->name, ap->evt_ring[evtcsm].evt);
1904 }
1905 evtcsm = (evtcsm + 1) % EVT_RING_ENTRIES;
1906 }
1907
1908 return evtcsm;
1909}
1910
1911
1912static void ace_rx_int(struct net_device *dev, u32 rxretprd, u32 rxretcsm)
1913{
1914 struct ace_private *ap = netdev_priv(dev);
1915 u32 idx;
1916 int mini_count = 0, std_count = 0;
1917
1918 idx = rxretcsm;
1919
1920 prefetchw(&ap->cur_rx_bufs);
1921 prefetchw(&ap->cur_mini_bufs);
1922
1923 while (idx != rxretprd) {
1924 struct ring_info *rip;
1925 struct sk_buff *skb;
1926 struct rx_desc *retdesc;
1927 u32 skbidx;
1928 int bd_flags, desc_type, mapsize;
1929 u16 csum;
1930
1931
1932 /* make sure the rx descriptor isn't read before rxretprd */
1933 if (idx == rxretcsm)
1934 rmb();
1935
1936 retdesc = &ap->rx_return_ring[idx];
1937 skbidx = retdesc->idx;
1938 bd_flags = retdesc->flags;
1939 desc_type = bd_flags & (BD_FLG_JUMBO | BD_FLG_MINI);
1940
1941 switch(desc_type) {
1942 /*
1943 * Normal frames do not have any flags set
1944 *
1945 * Mini and normal frames arrive frequently,
1946 * so use a local counter to avoid doing
1947 * atomic operations for each packet arriving.
1948 */
1949 case 0:
1950 rip = &ap->skb->rx_std_skbuff[skbidx];
1951 mapsize = ACE_STD_BUFSIZE;
1952 std_count++;
1953 break;
1954 case BD_FLG_JUMBO:
1955 rip = &ap->skb->rx_jumbo_skbuff[skbidx];
1956 mapsize = ACE_JUMBO_BUFSIZE;
1957 atomic_dec(&ap->cur_jumbo_bufs);
1958 break;
1959 case BD_FLG_MINI:
1960 rip = &ap->skb->rx_mini_skbuff[skbidx];
1961 mapsize = ACE_MINI_BUFSIZE;
1962 mini_count++;
1963 break;
1964 default:
1965 printk(KERN_INFO "%s: unknown frame type (0x%02x) "
1966 "returned by NIC\n", dev->name,
1967 retdesc->flags);
1968 goto error;
1969 }
1970
1971 skb = rip->skb;
1972 rip->skb = NULL;
1973 dma_unmap_page(&ap->pdev->dev, dma_unmap_addr(rip, mapping),
1974 mapsize, DMA_FROM_DEVICE);
1975 skb_put(skb, retdesc->size);
1976
1977 /*
1978 * Fly baby, fly!
1979 */
1980 csum = retdesc->tcp_udp_csum;
1981
1982 skb->protocol = eth_type_trans(skb, dev);
1983
1984 /*
1985 * Instead of forcing the poor tigon mips cpu to calculate
1986 * pseudo hdr checksum, we do this ourselves.
1987 */
1988 if (bd_flags & BD_FLG_TCP_UDP_SUM) {
1989 skb->csum = htons(csum);
1990 skb->ip_summed = CHECKSUM_COMPLETE;
1991 } else {
1992 skb_checksum_none_assert(skb);
1993 }
1994
1995 /* send it up */
1996 if ((bd_flags & BD_FLG_VLAN_TAG))
1997 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), retdesc->vlan);
1998 netif_rx(skb);
1999
2000 dev->stats.rx_packets++;
2001 dev->stats.rx_bytes += retdesc->size;
2002
2003 idx = (idx + 1) % RX_RETURN_RING_ENTRIES;
2004 }
2005
2006 atomic_sub(std_count, &ap->cur_rx_bufs);
2007 if (!ACE_IS_TIGON_I(ap))
2008 atomic_sub(mini_count, &ap->cur_mini_bufs);
2009
2010 out:
2011 /*
2012 * According to the documentation RxRetCsm is obsolete with
2013 * the 12.3.x Firmware - my Tigon I NICs seem to disagree!
2014 */
2015 if (ACE_IS_TIGON_I(ap)) {
2016 writel(idx, &ap->regs->RxRetCsm);
2017 }
2018 ap->cur_rx = idx;
2019
2020 return;
2021 error:
2022 idx = rxretprd;
2023 goto out;
2024}
2025
2026
2027static inline void ace_tx_int(struct net_device *dev,
2028 u32 txcsm, u32 idx)
2029{
2030 struct ace_private *ap = netdev_priv(dev);
2031
2032 do {
2033 struct sk_buff *skb;
2034 struct tx_ring_info *info;
2035
2036 info = ap->skb->tx_skbuff + idx;
2037 skb = info->skb;
2038
2039 if (dma_unmap_len(info, maplen)) {
2040 dma_unmap_page(&ap->pdev->dev,
2041 dma_unmap_addr(info, mapping),
2042 dma_unmap_len(info, maplen),
2043 DMA_TO_DEVICE);
2044 dma_unmap_len_set(info, maplen, 0);
2045 }
2046
2047 if (skb) {
2048 dev->stats.tx_packets++;
2049 dev->stats.tx_bytes += skb->len;
2050 dev_consume_skb_irq(skb);
2051 info->skb = NULL;
2052 }
2053
2054 idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap);
2055 } while (idx != txcsm);
2056
2057 if (netif_queue_stopped(dev))
2058 netif_wake_queue(dev);
2059
2060 wmb();
2061 ap->tx_ret_csm = txcsm;
2062
2063 /* So... tx_ret_csm is advanced _after_ check for device wakeup.
2064 *
2065 * We could try to make it before. In this case we would get
2066 * the following race condition: hard_start_xmit on other cpu
2067 * enters after we advanced tx_ret_csm and fills space,
2068 * which we have just freed, so that we make illegal device wakeup.
2069 * There is no good way to workaround this (at entry
2070 * to ace_start_xmit detects this condition and prevents
2071 * ring corruption, but it is not a good workaround.)
2072 *
2073 * When tx_ret_csm is advanced after, we wake up device _only_
2074 * if we really have some space in ring (though the core doing
2075 * hard_start_xmit can see full ring for some period and has to
2076 * synchronize.) Superb.
2077 * BUT! We get another subtle race condition. hard_start_xmit
2078 * may think that ring is full between wakeup and advancing
2079 * tx_ret_csm and will stop device instantly! It is not so bad.
2080 * We are guaranteed that there is something in ring, so that
2081 * the next irq will resume transmission. To speedup this we could
2082 * mark descriptor, which closes ring with BD_FLG_COAL_NOW
2083 * (see ace_start_xmit).
2084 *
2085 * Well, this dilemma exists in all lock-free devices.
2086 * We, following scheme used in drivers by Donald Becker,
2087 * select the least dangerous.
2088 * --ANK
2089 */
2090}
2091
2092
2093static irqreturn_t ace_interrupt(int irq, void *dev_id)
2094{
2095 struct net_device *dev = (struct net_device *)dev_id;
2096 struct ace_private *ap = netdev_priv(dev);
2097 struct ace_regs __iomem *regs = ap->regs;
2098 u32 idx;
2099 u32 txcsm, rxretcsm, rxretprd;
2100 u32 evtcsm, evtprd;
2101
2102 /*
2103 * In case of PCI shared interrupts or spurious interrupts,
2104 * we want to make sure it is actually our interrupt before
2105 * spending any time in here.
2106 */
2107 if (!(readl(&regs->HostCtrl) & IN_INT))
2108 return IRQ_NONE;
2109
2110 /*
2111 * ACK intr now. Otherwise we will lose updates to rx_ret_prd,
2112 * which happened _after_ rxretprd = *ap->rx_ret_prd; but before
2113 * writel(0, &regs->Mb0Lo).
2114 *
2115 * "IRQ avoidance" recommended in docs applies to IRQs served
2116 * threads and it is wrong even for that case.
2117 */
2118 writel(0, &regs->Mb0Lo);
2119 readl(&regs->Mb0Lo);
2120
2121 /*
2122 * There is no conflict between transmit handling in
2123 * start_xmit and receive processing, thus there is no reason
2124 * to take a spin lock for RX handling. Wait until we start
2125 * working on the other stuff - hey we don't need a spin lock
2126 * anymore.
2127 */
2128 rxretprd = *ap->rx_ret_prd;
2129 rxretcsm = ap->cur_rx;
2130
2131 if (rxretprd != rxretcsm)
2132 ace_rx_int(dev, rxretprd, rxretcsm);
2133
2134 txcsm = *ap->tx_csm;
2135 idx = ap->tx_ret_csm;
2136
2137 if (txcsm != idx) {
2138 /*
2139 * If each skb takes only one descriptor this check degenerates
2140 * to identity, because new space has just been opened.
2141 * But if skbs are fragmented we must check that this index
2142 * update releases enough of space, otherwise we just
2143 * wait for device to make more work.
2144 */
2145 if (!tx_ring_full(ap, txcsm, ap->tx_prd))
2146 ace_tx_int(dev, txcsm, idx);
2147 }
2148
2149 evtcsm = readl(&regs->EvtCsm);
2150 evtprd = *ap->evt_prd;
2151
2152 if (evtcsm != evtprd) {
2153 evtcsm = ace_handle_event(dev, evtcsm, evtprd);
2154 writel(evtcsm, &regs->EvtCsm);
2155 }
2156
2157 /*
2158 * This has to go last in the interrupt handler and run with
2159 * the spin lock released ... what lock?
2160 */
2161 if (netif_running(dev)) {
2162 int cur_size;
2163 int run_tasklet = 0;
2164
2165 cur_size = atomic_read(&ap->cur_rx_bufs);
2166 if (cur_size < RX_LOW_STD_THRES) {
2167 if ((cur_size < RX_PANIC_STD_THRES) &&
2168 !test_and_set_bit(0, &ap->std_refill_busy)) {
2169#ifdef DEBUG
2170 printk("low on std buffers %i\n", cur_size);
2171#endif
2172 ace_load_std_rx_ring(dev,
2173 RX_RING_SIZE - cur_size);
2174 } else
2175 run_tasklet = 1;
2176 }
2177
2178 if (!ACE_IS_TIGON_I(ap)) {
2179 cur_size = atomic_read(&ap->cur_mini_bufs);
2180 if (cur_size < RX_LOW_MINI_THRES) {
2181 if ((cur_size < RX_PANIC_MINI_THRES) &&
2182 !test_and_set_bit(0,
2183 &ap->mini_refill_busy)) {
2184#ifdef DEBUG
2185 printk("low on mini buffers %i\n",
2186 cur_size);
2187#endif
2188 ace_load_mini_rx_ring(dev,
2189 RX_MINI_SIZE - cur_size);
2190 } else
2191 run_tasklet = 1;
2192 }
2193 }
2194
2195 if (ap->jumbo) {
2196 cur_size = atomic_read(&ap->cur_jumbo_bufs);
2197 if (cur_size < RX_LOW_JUMBO_THRES) {
2198 if ((cur_size < RX_PANIC_JUMBO_THRES) &&
2199 !test_and_set_bit(0,
2200 &ap->jumbo_refill_busy)){
2201#ifdef DEBUG
2202 printk("low on jumbo buffers %i\n",
2203 cur_size);
2204#endif
2205 ace_load_jumbo_rx_ring(dev,
2206 RX_JUMBO_SIZE - cur_size);
2207 } else
2208 run_tasklet = 1;
2209 }
2210 }
2211 if (run_tasklet && !ap->tasklet_pending) {
2212 ap->tasklet_pending = 1;
2213 tasklet_schedule(&ap->ace_tasklet);
2214 }
2215 }
2216
2217 return IRQ_HANDLED;
2218}
2219
2220static int ace_open(struct net_device *dev)
2221{
2222 struct ace_private *ap = netdev_priv(dev);
2223 struct ace_regs __iomem *regs = ap->regs;
2224 struct cmd cmd;
2225
2226 if (!(ap->fw_running)) {
2227 printk(KERN_WARNING "%s: Firmware not running!\n", dev->name);
2228 return -EBUSY;
2229 }
2230
2231 writel(dev->mtu + ETH_HLEN + 4, &regs->IfMtu);
2232
2233 cmd.evt = C_CLEAR_STATS;
2234 cmd.code = 0;
2235 cmd.idx = 0;
2236 ace_issue_cmd(regs, &cmd);
2237
2238 cmd.evt = C_HOST_STATE;
2239 cmd.code = C_C_STACK_UP;
2240 cmd.idx = 0;
2241 ace_issue_cmd(regs, &cmd);
2242
2243 if (ap->jumbo &&
2244 !test_and_set_bit(0, &ap->jumbo_refill_busy))
2245 ace_load_jumbo_rx_ring(dev, RX_JUMBO_SIZE);
2246
2247 if (dev->flags & IFF_PROMISC) {
2248 cmd.evt = C_SET_PROMISC_MODE;
2249 cmd.code = C_C_PROMISC_ENABLE;
2250 cmd.idx = 0;
2251 ace_issue_cmd(regs, &cmd);
2252
2253 ap->promisc = 1;
2254 }else
2255 ap->promisc = 0;
2256 ap->mcast_all = 0;
2257
2258#if 0
2259 cmd.evt = C_LNK_NEGOTIATION;
2260 cmd.code = 0;
2261 cmd.idx = 0;
2262 ace_issue_cmd(regs, &cmd);
2263#endif
2264
2265 netif_start_queue(dev);
2266
2267 /*
2268 * Setup the bottom half rx ring refill handler
2269 */
2270 tasklet_setup(&ap->ace_tasklet, ace_tasklet);
2271 return 0;
2272}
2273
2274
2275static int ace_close(struct net_device *dev)
2276{
2277 struct ace_private *ap = netdev_priv(dev);
2278 struct ace_regs __iomem *regs = ap->regs;
2279 struct cmd cmd;
2280 unsigned long flags;
2281 short i;
2282
2283 /*
2284 * Without (or before) releasing irq and stopping hardware, this
2285 * is an absolute non-sense, by the way. It will be reset instantly
2286 * by the first irq.
2287 */
2288 netif_stop_queue(dev);
2289
2290
2291 if (ap->promisc) {
2292 cmd.evt = C_SET_PROMISC_MODE;
2293 cmd.code = C_C_PROMISC_DISABLE;
2294 cmd.idx = 0;
2295 ace_issue_cmd(regs, &cmd);
2296 ap->promisc = 0;
2297 }
2298
2299 cmd.evt = C_HOST_STATE;
2300 cmd.code = C_C_STACK_DOWN;
2301 cmd.idx = 0;
2302 ace_issue_cmd(regs, &cmd);
2303
2304 tasklet_kill(&ap->ace_tasklet);
2305
2306 /*
2307 * Make sure one CPU is not processing packets while
2308 * buffers are being released by another.
2309 */
2310
2311 local_irq_save(flags);
2312 ace_mask_irq(dev);
2313
2314 for (i = 0; i < ACE_TX_RING_ENTRIES(ap); i++) {
2315 struct sk_buff *skb;
2316 struct tx_ring_info *info;
2317
2318 info = ap->skb->tx_skbuff + i;
2319 skb = info->skb;
2320
2321 if (dma_unmap_len(info, maplen)) {
2322 if (ACE_IS_TIGON_I(ap)) {
2323 /* NB: TIGON_1 is special, tx_ring is in io space */
2324 struct tx_desc __iomem *tx;
2325 tx = (__force struct tx_desc __iomem *) &ap->tx_ring[i];
2326 writel(0, &tx->addr.addrhi);
2327 writel(0, &tx->addr.addrlo);
2328 writel(0, &tx->flagsize);
2329 } else
2330 memset(ap->tx_ring + i, 0,
2331 sizeof(struct tx_desc));
2332 dma_unmap_page(&ap->pdev->dev,
2333 dma_unmap_addr(info, mapping),
2334 dma_unmap_len(info, maplen),
2335 DMA_TO_DEVICE);
2336 dma_unmap_len_set(info, maplen, 0);
2337 }
2338 if (skb) {
2339 dev_kfree_skb(skb);
2340 info->skb = NULL;
2341 }
2342 }
2343
2344 if (ap->jumbo) {
2345 cmd.evt = C_RESET_JUMBO_RNG;
2346 cmd.code = 0;
2347 cmd.idx = 0;
2348 ace_issue_cmd(regs, &cmd);
2349 }
2350
2351 ace_unmask_irq(dev);
2352 local_irq_restore(flags);
2353
2354 return 0;
2355}
2356
2357
2358static inline dma_addr_t
2359ace_map_tx_skb(struct ace_private *ap, struct sk_buff *skb,
2360 struct sk_buff *tail, u32 idx)
2361{
2362 dma_addr_t mapping;
2363 struct tx_ring_info *info;
2364
2365 mapping = dma_map_page(&ap->pdev->dev, virt_to_page(skb->data),
2366 offset_in_page(skb->data), skb->len,
2367 DMA_TO_DEVICE);
2368
2369 info = ap->skb->tx_skbuff + idx;
2370 info->skb = tail;
2371 dma_unmap_addr_set(info, mapping, mapping);
2372 dma_unmap_len_set(info, maplen, skb->len);
2373 return mapping;
2374}
2375
2376
2377static inline void
2378ace_load_tx_bd(struct ace_private *ap, struct tx_desc *desc, u64 addr,
2379 u32 flagsize, u32 vlan_tag)
2380{
2381#if !USE_TX_COAL_NOW
2382 flagsize &= ~BD_FLG_COAL_NOW;
2383#endif
2384
2385 if (ACE_IS_TIGON_I(ap)) {
2386 struct tx_desc __iomem *io = (__force struct tx_desc __iomem *) desc;
2387 writel(addr >> 32, &io->addr.addrhi);
2388 writel(addr & 0xffffffff, &io->addr.addrlo);
2389 writel(flagsize, &io->flagsize);
2390 writel(vlan_tag, &io->vlanres);
2391 } else {
2392 desc->addr.addrhi = addr >> 32;
2393 desc->addr.addrlo = addr;
2394 desc->flagsize = flagsize;
2395 desc->vlanres = vlan_tag;
2396 }
2397}
2398
2399
2400static netdev_tx_t ace_start_xmit(struct sk_buff *skb,
2401 struct net_device *dev)
2402{
2403 struct ace_private *ap = netdev_priv(dev);
2404 struct ace_regs __iomem *regs = ap->regs;
2405 struct tx_desc *desc;
2406 u32 idx, flagsize;
2407 unsigned long maxjiff = jiffies + 3*HZ;
2408
2409restart:
2410 idx = ap->tx_prd;
2411
2412 if (tx_ring_full(ap, ap->tx_ret_csm, idx))
2413 goto overflow;
2414
2415 if (!skb_shinfo(skb)->nr_frags) {
2416 dma_addr_t mapping;
2417 u32 vlan_tag = 0;
2418
2419 mapping = ace_map_tx_skb(ap, skb, skb, idx);
2420 flagsize = (skb->len << 16) | (BD_FLG_END);
2421 if (skb->ip_summed == CHECKSUM_PARTIAL)
2422 flagsize |= BD_FLG_TCP_UDP_SUM;
2423 if (skb_vlan_tag_present(skb)) {
2424 flagsize |= BD_FLG_VLAN_TAG;
2425 vlan_tag = skb_vlan_tag_get(skb);
2426 }
2427 desc = ap->tx_ring + idx;
2428 idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap);
2429
2430 /* Look at ace_tx_int for explanations. */
2431 if (tx_ring_full(ap, ap->tx_ret_csm, idx))
2432 flagsize |= BD_FLG_COAL_NOW;
2433
2434 ace_load_tx_bd(ap, desc, mapping, flagsize, vlan_tag);
2435 } else {
2436 dma_addr_t mapping;
2437 u32 vlan_tag = 0;
2438 int i, len = 0;
2439
2440 mapping = ace_map_tx_skb(ap, skb, NULL, idx);
2441 flagsize = (skb_headlen(skb) << 16);
2442 if (skb->ip_summed == CHECKSUM_PARTIAL)
2443 flagsize |= BD_FLG_TCP_UDP_SUM;
2444 if (skb_vlan_tag_present(skb)) {
2445 flagsize |= BD_FLG_VLAN_TAG;
2446 vlan_tag = skb_vlan_tag_get(skb);
2447 }
2448
2449 ace_load_tx_bd(ap, ap->tx_ring + idx, mapping, flagsize, vlan_tag);
2450
2451 idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap);
2452
2453 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
2454 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2455 struct tx_ring_info *info;
2456
2457 len += skb_frag_size(frag);
2458 info = ap->skb->tx_skbuff + idx;
2459 desc = ap->tx_ring + idx;
2460
2461 mapping = skb_frag_dma_map(&ap->pdev->dev, frag, 0,
2462 skb_frag_size(frag),
2463 DMA_TO_DEVICE);
2464
2465 flagsize = skb_frag_size(frag) << 16;
2466 if (skb->ip_summed == CHECKSUM_PARTIAL)
2467 flagsize |= BD_FLG_TCP_UDP_SUM;
2468 idx = (idx + 1) % ACE_TX_RING_ENTRIES(ap);
2469
2470 if (i == skb_shinfo(skb)->nr_frags - 1) {
2471 flagsize |= BD_FLG_END;
2472 if (tx_ring_full(ap, ap->tx_ret_csm, idx))
2473 flagsize |= BD_FLG_COAL_NOW;
2474
2475 /*
2476 * Only the last fragment frees
2477 * the skb!
2478 */
2479 info->skb = skb;
2480 } else {
2481 info->skb = NULL;
2482 }
2483 dma_unmap_addr_set(info, mapping, mapping);
2484 dma_unmap_len_set(info, maplen, skb_frag_size(frag));
2485 ace_load_tx_bd(ap, desc, mapping, flagsize, vlan_tag);
2486 }
2487 }
2488
2489 wmb();
2490 ap->tx_prd = idx;
2491 ace_set_txprd(regs, ap, idx);
2492
2493 if (flagsize & BD_FLG_COAL_NOW) {
2494 netif_stop_queue(dev);
2495
2496 /*
2497 * A TX-descriptor producer (an IRQ) might have gotten
2498 * between, making the ring free again. Since xmit is
2499 * serialized, this is the only situation we have to
2500 * re-test.
2501 */
2502 if (!tx_ring_full(ap, ap->tx_ret_csm, idx))
2503 netif_wake_queue(dev);
2504 }
2505
2506 return NETDEV_TX_OK;
2507
2508overflow:
2509 /*
2510 * This race condition is unavoidable with lock-free drivers.
2511 * We wake up the queue _before_ tx_prd is advanced, so that we can
2512 * enter hard_start_xmit too early, while tx ring still looks closed.
2513 * This happens ~1-4 times per 100000 packets, so that we can allow
2514 * to loop syncing to other CPU. Probably, we need an additional
2515 * wmb() in ace_tx_intr as well.
2516 *
2517 * Note that this race is relieved by reserving one more entry
2518 * in tx ring than it is necessary (see original non-SG driver).
2519 * However, with SG we need to reserve 2*MAX_SKB_FRAGS+1, which
2520 * is already overkill.
2521 *
2522 * Alternative is to return with 1 not throttling queue. In this
2523 * case loop becomes longer, no more useful effects.
2524 */
2525 if (time_before(jiffies, maxjiff)) {
2526 barrier();
2527 cpu_relax();
2528 goto restart;
2529 }
2530
2531 /* The ring is stuck full. */
2532 printk(KERN_WARNING "%s: Transmit ring stuck full\n", dev->name);
2533 return NETDEV_TX_BUSY;
2534}
2535
2536
2537static int ace_change_mtu(struct net_device *dev, int new_mtu)
2538{
2539 struct ace_private *ap = netdev_priv(dev);
2540 struct ace_regs __iomem *regs = ap->regs;
2541
2542 writel(new_mtu + ETH_HLEN + 4, &regs->IfMtu);
2543 dev->mtu = new_mtu;
2544
2545 if (new_mtu > ACE_STD_MTU) {
2546 if (!(ap->jumbo)) {
2547 printk(KERN_INFO "%s: Enabling Jumbo frame "
2548 "support\n", dev->name);
2549 ap->jumbo = 1;
2550 if (!test_and_set_bit(0, &ap->jumbo_refill_busy))
2551 ace_load_jumbo_rx_ring(dev, RX_JUMBO_SIZE);
2552 ace_set_rxtx_parms(dev, 1);
2553 }
2554 } else {
2555 while (test_and_set_bit(0, &ap->jumbo_refill_busy));
2556 ace_sync_irq(dev->irq);
2557 ace_set_rxtx_parms(dev, 0);
2558 if (ap->jumbo) {
2559 struct cmd cmd;
2560
2561 cmd.evt = C_RESET_JUMBO_RNG;
2562 cmd.code = 0;
2563 cmd.idx = 0;
2564 ace_issue_cmd(regs, &cmd);
2565 }
2566 }
2567
2568 return 0;
2569}
2570
2571static int ace_get_link_ksettings(struct net_device *dev,
2572 struct ethtool_link_ksettings *cmd)
2573{
2574 struct ace_private *ap = netdev_priv(dev);
2575 struct ace_regs __iomem *regs = ap->regs;
2576 u32 link;
2577 u32 supported;
2578
2579 memset(cmd, 0, sizeof(struct ethtool_link_ksettings));
2580
2581 supported = (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
2582 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
2583 SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full |
2584 SUPPORTED_Autoneg | SUPPORTED_FIBRE);
2585
2586 cmd->base.port = PORT_FIBRE;
2587
2588 link = readl(&regs->GigLnkState);
2589 if (link & LNK_1000MB) {
2590 cmd->base.speed = SPEED_1000;
2591 } else {
2592 link = readl(&regs->FastLnkState);
2593 if (link & LNK_100MB)
2594 cmd->base.speed = SPEED_100;
2595 else if (link & LNK_10MB)
2596 cmd->base.speed = SPEED_10;
2597 else
2598 cmd->base.speed = 0;
2599 }
2600 if (link & LNK_FULL_DUPLEX)
2601 cmd->base.duplex = DUPLEX_FULL;
2602 else
2603 cmd->base.duplex = DUPLEX_HALF;
2604
2605 if (link & LNK_NEGOTIATE)
2606 cmd->base.autoneg = AUTONEG_ENABLE;
2607 else
2608 cmd->base.autoneg = AUTONEG_DISABLE;
2609
2610#if 0
2611 /*
2612 * Current struct ethtool_cmd is insufficient
2613 */
2614 ecmd->trace = readl(&regs->TuneTrace);
2615
2616 ecmd->txcoal = readl(&regs->TuneTxCoalTicks);
2617 ecmd->rxcoal = readl(&regs->TuneRxCoalTicks);
2618#endif
2619
2620 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
2621 supported);
2622
2623 return 0;
2624}
2625
2626static int ace_set_link_ksettings(struct net_device *dev,
2627 const struct ethtool_link_ksettings *cmd)
2628{
2629 struct ace_private *ap = netdev_priv(dev);
2630 struct ace_regs __iomem *regs = ap->regs;
2631 u32 link, speed;
2632
2633 link = readl(&regs->GigLnkState);
2634 if (link & LNK_1000MB)
2635 speed = SPEED_1000;
2636 else {
2637 link = readl(&regs->FastLnkState);
2638 if (link & LNK_100MB)
2639 speed = SPEED_100;
2640 else if (link & LNK_10MB)
2641 speed = SPEED_10;
2642 else
2643 speed = SPEED_100;
2644 }
2645
2646 link = LNK_ENABLE | LNK_1000MB | LNK_100MB | LNK_10MB |
2647 LNK_RX_FLOW_CTL_Y | LNK_NEG_FCTL;
2648 if (!ACE_IS_TIGON_I(ap))
2649 link |= LNK_TX_FLOW_CTL_Y;
2650 if (cmd->base.autoneg == AUTONEG_ENABLE)
2651 link |= LNK_NEGOTIATE;
2652 if (cmd->base.speed != speed) {
2653 link &= ~(LNK_1000MB | LNK_100MB | LNK_10MB);
2654 switch (cmd->base.speed) {
2655 case SPEED_1000:
2656 link |= LNK_1000MB;
2657 break;
2658 case SPEED_100:
2659 link |= LNK_100MB;
2660 break;
2661 case SPEED_10:
2662 link |= LNK_10MB;
2663 break;
2664 }
2665 }
2666
2667 if (cmd->base.duplex == DUPLEX_FULL)
2668 link |= LNK_FULL_DUPLEX;
2669
2670 if (link != ap->link) {
2671 struct cmd cmd;
2672 printk(KERN_INFO "%s: Renegotiating link state\n",
2673 dev->name);
2674
2675 ap->link = link;
2676 writel(link, &regs->TuneLink);
2677 if (!ACE_IS_TIGON_I(ap))
2678 writel(link, &regs->TuneFastLink);
2679 wmb();
2680
2681 cmd.evt = C_LNK_NEGOTIATION;
2682 cmd.code = 0;
2683 cmd.idx = 0;
2684 ace_issue_cmd(regs, &cmd);
2685 }
2686 return 0;
2687}
2688
2689static void ace_get_drvinfo(struct net_device *dev,
2690 struct ethtool_drvinfo *info)
2691{
2692 struct ace_private *ap = netdev_priv(dev);
2693
2694 strlcpy(info->driver, "acenic", sizeof(info->driver));
2695 snprintf(info->fw_version, sizeof(info->version), "%i.%i.%i",
2696 ap->firmware_major, ap->firmware_minor, ap->firmware_fix);
2697
2698 if (ap->pdev)
2699 strlcpy(info->bus_info, pci_name(ap->pdev),
2700 sizeof(info->bus_info));
2701
2702}
2703
2704/*
2705 * Set the hardware MAC address.
2706 */
2707static int ace_set_mac_addr(struct net_device *dev, void *p)
2708{
2709 struct ace_private *ap = netdev_priv(dev);
2710 struct ace_regs __iomem *regs = ap->regs;
2711 struct sockaddr *addr=p;
2712 const u8 *da;
2713 struct cmd cmd;
2714
2715 if(netif_running(dev))
2716 return -EBUSY;
2717
2718 eth_hw_addr_set(dev, addr->sa_data);
2719
2720 da = (const u8 *)dev->dev_addr;
2721
2722 writel(da[0] << 8 | da[1], &regs->MacAddrHi);
2723 writel((da[2] << 24) | (da[3] << 16) | (da[4] << 8) | da[5],
2724 &regs->MacAddrLo);
2725
2726 cmd.evt = C_SET_MAC_ADDR;
2727 cmd.code = 0;
2728 cmd.idx = 0;
2729 ace_issue_cmd(regs, &cmd);
2730
2731 return 0;
2732}
2733
2734
2735static void ace_set_multicast_list(struct net_device *dev)
2736{
2737 struct ace_private *ap = netdev_priv(dev);
2738 struct ace_regs __iomem *regs = ap->regs;
2739 struct cmd cmd;
2740
2741 if ((dev->flags & IFF_ALLMULTI) && !(ap->mcast_all)) {
2742 cmd.evt = C_SET_MULTICAST_MODE;
2743 cmd.code = C_C_MCAST_ENABLE;
2744 cmd.idx = 0;
2745 ace_issue_cmd(regs, &cmd);
2746 ap->mcast_all = 1;
2747 } else if (ap->mcast_all) {
2748 cmd.evt = C_SET_MULTICAST_MODE;
2749 cmd.code = C_C_MCAST_DISABLE;
2750 cmd.idx = 0;
2751 ace_issue_cmd(regs, &cmd);
2752 ap->mcast_all = 0;
2753 }
2754
2755 if ((dev->flags & IFF_PROMISC) && !(ap->promisc)) {
2756 cmd.evt = C_SET_PROMISC_MODE;
2757 cmd.code = C_C_PROMISC_ENABLE;
2758 cmd.idx = 0;
2759 ace_issue_cmd(regs, &cmd);
2760 ap->promisc = 1;
2761 }else if (!(dev->flags & IFF_PROMISC) && (ap->promisc)) {
2762 cmd.evt = C_SET_PROMISC_MODE;
2763 cmd.code = C_C_PROMISC_DISABLE;
2764 cmd.idx = 0;
2765 ace_issue_cmd(regs, &cmd);
2766 ap->promisc = 0;
2767 }
2768
2769 /*
2770 * For the time being multicast relies on the upper layers
2771 * filtering it properly. The Firmware does not allow one to
2772 * set the entire multicast list at a time and keeping track of
2773 * it here is going to be messy.
2774 */
2775 if (!netdev_mc_empty(dev) && !ap->mcast_all) {
2776 cmd.evt = C_SET_MULTICAST_MODE;
2777 cmd.code = C_C_MCAST_ENABLE;
2778 cmd.idx = 0;
2779 ace_issue_cmd(regs, &cmd);
2780 }else if (!ap->mcast_all) {
2781 cmd.evt = C_SET_MULTICAST_MODE;
2782 cmd.code = C_C_MCAST_DISABLE;
2783 cmd.idx = 0;
2784 ace_issue_cmd(regs, &cmd);
2785 }
2786}
2787
2788
2789static struct net_device_stats *ace_get_stats(struct net_device *dev)
2790{
2791 struct ace_private *ap = netdev_priv(dev);
2792 struct ace_mac_stats __iomem *mac_stats =
2793 (struct ace_mac_stats __iomem *)ap->regs->Stats;
2794
2795 dev->stats.rx_missed_errors = readl(&mac_stats->drop_space);
2796 dev->stats.multicast = readl(&mac_stats->kept_mc);
2797 dev->stats.collisions = readl(&mac_stats->coll);
2798
2799 return &dev->stats;
2800}
2801
2802
2803static void ace_copy(struct ace_regs __iomem *regs, const __be32 *src,
2804 u32 dest, int size)
2805{
2806 void __iomem *tdest;
2807 short tsize, i;
2808
2809 if (size <= 0)
2810 return;
2811
2812 while (size > 0) {
2813 tsize = min_t(u32, ((~dest & (ACE_WINDOW_SIZE - 1)) + 1),
2814 min_t(u32, size, ACE_WINDOW_SIZE));
2815 tdest = (void __iomem *) &regs->Window +
2816 (dest & (ACE_WINDOW_SIZE - 1));
2817 writel(dest & ~(ACE_WINDOW_SIZE - 1), &regs->WinBase);
2818 for (i = 0; i < (tsize / 4); i++) {
2819 /* Firmware is big-endian */
2820 writel(be32_to_cpup(src), tdest);
2821 src++;
2822 tdest += 4;
2823 dest += 4;
2824 size -= 4;
2825 }
2826 }
2827}
2828
2829
2830static void ace_clear(struct ace_regs __iomem *regs, u32 dest, int size)
2831{
2832 void __iomem *tdest;
2833 short tsize = 0, i;
2834
2835 if (size <= 0)
2836 return;
2837
2838 while (size > 0) {
2839 tsize = min_t(u32, ((~dest & (ACE_WINDOW_SIZE - 1)) + 1),
2840 min_t(u32, size, ACE_WINDOW_SIZE));
2841 tdest = (void __iomem *) &regs->Window +
2842 (dest & (ACE_WINDOW_SIZE - 1));
2843 writel(dest & ~(ACE_WINDOW_SIZE - 1), &regs->WinBase);
2844
2845 for (i = 0; i < (tsize / 4); i++) {
2846 writel(0, tdest + i*4);
2847 }
2848
2849 dest += tsize;
2850 size -= tsize;
2851 }
2852}
2853
2854
2855/*
2856 * Download the firmware into the SRAM on the NIC
2857 *
2858 * This operation requires the NIC to be halted and is performed with
2859 * interrupts disabled and with the spinlock hold.
2860 */
2861static int ace_load_firmware(struct net_device *dev)
2862{
2863 const struct firmware *fw;
2864 const char *fw_name = "acenic/tg2.bin";
2865 struct ace_private *ap = netdev_priv(dev);
2866 struct ace_regs __iomem *regs = ap->regs;
2867 const __be32 *fw_data;
2868 u32 load_addr;
2869 int ret;
2870
2871 if (!(readl(&regs->CpuCtrl) & CPU_HALTED)) {
2872 printk(KERN_ERR "%s: trying to download firmware while the "
2873 "CPU is running!\n", ap->name);
2874 return -EFAULT;
2875 }
2876
2877 if (ACE_IS_TIGON_I(ap))
2878 fw_name = "acenic/tg1.bin";
2879
2880 ret = request_firmware(&fw, fw_name, &ap->pdev->dev);
2881 if (ret) {
2882 printk(KERN_ERR "%s: Failed to load firmware \"%s\"\n",
2883 ap->name, fw_name);
2884 return ret;
2885 }
2886
2887 fw_data = (void *)fw->data;
2888
2889 /* Firmware blob starts with version numbers, followed by
2890 load and start address. Remainder is the blob to be loaded
2891 contiguously from load address. We don't bother to represent
2892 the BSS/SBSS sections any more, since we were clearing the
2893 whole thing anyway. */
2894 ap->firmware_major = fw->data[0];
2895 ap->firmware_minor = fw->data[1];
2896 ap->firmware_fix = fw->data[2];
2897
2898 ap->firmware_start = be32_to_cpu(fw_data[1]);
2899 if (ap->firmware_start < 0x4000 || ap->firmware_start >= 0x80000) {
2900 printk(KERN_ERR "%s: bogus load address %08x in \"%s\"\n",
2901 ap->name, ap->firmware_start, fw_name);
2902 ret = -EINVAL;
2903 goto out;
2904 }
2905
2906 load_addr = be32_to_cpu(fw_data[2]);
2907 if (load_addr < 0x4000 || load_addr >= 0x80000) {
2908 printk(KERN_ERR "%s: bogus load address %08x in \"%s\"\n",
2909 ap->name, load_addr, fw_name);
2910 ret = -EINVAL;
2911 goto out;
2912 }
2913
2914 /*
2915 * Do not try to clear more than 512KiB or we end up seeing
2916 * funny things on NICs with only 512KiB SRAM
2917 */
2918 ace_clear(regs, 0x2000, 0x80000-0x2000);
2919 ace_copy(regs, &fw_data[3], load_addr, fw->size-12);
2920 out:
2921 release_firmware(fw);
2922 return ret;
2923}
2924
2925
2926/*
2927 * The eeprom on the AceNIC is an Atmel i2c EEPROM.
2928 *
2929 * Accessing the EEPROM is `interesting' to say the least - don't read
2930 * this code right after dinner.
2931 *
2932 * This is all about black magic and bit-banging the device .... I
2933 * wonder in what hospital they have put the guy who designed the i2c
2934 * specs.
2935 *
2936 * Oh yes, this is only the beginning!
2937 *
2938 * Thanks to Stevarino Webinski for helping tracking down the bugs in the
2939 * code i2c readout code by beta testing all my hacks.
2940 */
2941static void eeprom_start(struct ace_regs __iomem *regs)
2942{
2943 u32 local;
2944
2945 readl(&regs->LocalCtrl);
2946 udelay(ACE_SHORT_DELAY);
2947 local = readl(&regs->LocalCtrl);
2948 local |= EEPROM_DATA_OUT | EEPROM_WRITE_ENABLE;
2949 writel(local, &regs->LocalCtrl);
2950 readl(&regs->LocalCtrl);
2951 mb();
2952 udelay(ACE_SHORT_DELAY);
2953 local |= EEPROM_CLK_OUT;
2954 writel(local, &regs->LocalCtrl);
2955 readl(&regs->LocalCtrl);
2956 mb();
2957 udelay(ACE_SHORT_DELAY);
2958 local &= ~EEPROM_DATA_OUT;
2959 writel(local, &regs->LocalCtrl);
2960 readl(&regs->LocalCtrl);
2961 mb();
2962 udelay(ACE_SHORT_DELAY);
2963 local &= ~EEPROM_CLK_OUT;
2964 writel(local, &regs->LocalCtrl);
2965 readl(&regs->LocalCtrl);
2966 mb();
2967}
2968
2969
2970static void eeprom_prep(struct ace_regs __iomem *regs, u8 magic)
2971{
2972 short i;
2973 u32 local;
2974
2975 udelay(ACE_SHORT_DELAY);
2976 local = readl(&regs->LocalCtrl);
2977 local &= ~EEPROM_DATA_OUT;
2978 local |= EEPROM_WRITE_ENABLE;
2979 writel(local, &regs->LocalCtrl);
2980 readl(&regs->LocalCtrl);
2981 mb();
2982
2983 for (i = 0; i < 8; i++, magic <<= 1) {
2984 udelay(ACE_SHORT_DELAY);
2985 if (magic & 0x80)
2986 local |= EEPROM_DATA_OUT;
2987 else
2988 local &= ~EEPROM_DATA_OUT;
2989 writel(local, &regs->LocalCtrl);
2990 readl(&regs->LocalCtrl);
2991 mb();
2992
2993 udelay(ACE_SHORT_DELAY);
2994 local |= EEPROM_CLK_OUT;
2995 writel(local, &regs->LocalCtrl);
2996 readl(&regs->LocalCtrl);
2997 mb();
2998 udelay(ACE_SHORT_DELAY);
2999 local &= ~(EEPROM_CLK_OUT | EEPROM_DATA_OUT);
3000 writel(local, &regs->LocalCtrl);
3001 readl(&regs->LocalCtrl);
3002 mb();
3003 }
3004}
3005
3006
3007static int eeprom_check_ack(struct ace_regs __iomem *regs)
3008{
3009 int state;
3010 u32 local;
3011
3012 local = readl(&regs->LocalCtrl);
3013 local &= ~EEPROM_WRITE_ENABLE;
3014 writel(local, &regs->LocalCtrl);
3015 readl(&regs->LocalCtrl);
3016 mb();
3017 udelay(ACE_LONG_DELAY);
3018 local |= EEPROM_CLK_OUT;
3019 writel(local, &regs->LocalCtrl);
3020 readl(&regs->LocalCtrl);
3021 mb();
3022 udelay(ACE_SHORT_DELAY);
3023 /* sample data in middle of high clk */
3024 state = (readl(&regs->LocalCtrl) & EEPROM_DATA_IN) != 0;
3025 udelay(ACE_SHORT_DELAY);
3026 mb();
3027 writel(readl(&regs->LocalCtrl) & ~EEPROM_CLK_OUT, &regs->LocalCtrl);
3028 readl(&regs->LocalCtrl);
3029 mb();
3030
3031 return state;
3032}
3033
3034
3035static void eeprom_stop(struct ace_regs __iomem *regs)
3036{
3037 u32 local;
3038
3039 udelay(ACE_SHORT_DELAY);
3040 local = readl(&regs->LocalCtrl);
3041 local |= EEPROM_WRITE_ENABLE;
3042 writel(local, &regs->LocalCtrl);
3043 readl(&regs->LocalCtrl);
3044 mb();
3045 udelay(ACE_SHORT_DELAY);
3046 local &= ~EEPROM_DATA_OUT;
3047 writel(local, &regs->LocalCtrl);
3048 readl(&regs->LocalCtrl);
3049 mb();
3050 udelay(ACE_SHORT_DELAY);
3051 local |= EEPROM_CLK_OUT;
3052 writel(local, &regs->LocalCtrl);
3053 readl(&regs->LocalCtrl);
3054 mb();
3055 udelay(ACE_SHORT_DELAY);
3056 local |= EEPROM_DATA_OUT;
3057 writel(local, &regs->LocalCtrl);
3058 readl(&regs->LocalCtrl);
3059 mb();
3060 udelay(ACE_LONG_DELAY);
3061 local &= ~EEPROM_CLK_OUT;
3062 writel(local, &regs->LocalCtrl);
3063 mb();
3064}
3065
3066
3067/*
3068 * Read a whole byte from the EEPROM.
3069 */
3070static int read_eeprom_byte(struct net_device *dev, unsigned long offset)
3071{
3072 struct ace_private *ap = netdev_priv(dev);
3073 struct ace_regs __iomem *regs = ap->regs;
3074 unsigned long flags;
3075 u32 local;
3076 int result = 0;
3077 short i;
3078
3079 /*
3080 * Don't take interrupts on this CPU will bit banging
3081 * the %#%#@$ I2C device
3082 */
3083 local_irq_save(flags);
3084
3085 eeprom_start(regs);
3086
3087 eeprom_prep(regs, EEPROM_WRITE_SELECT);
3088 if (eeprom_check_ack(regs)) {
3089 local_irq_restore(flags);
3090 printk(KERN_ERR "%s: Unable to sync eeprom\n", ap->name);
3091 result = -EIO;
3092 goto eeprom_read_error;
3093 }
3094
3095 eeprom_prep(regs, (offset >> 8) & 0xff);
3096 if (eeprom_check_ack(regs)) {
3097 local_irq_restore(flags);
3098 printk(KERN_ERR "%s: Unable to set address byte 0\n",
3099 ap->name);
3100 result = -EIO;
3101 goto eeprom_read_error;
3102 }
3103
3104 eeprom_prep(regs, offset & 0xff);
3105 if (eeprom_check_ack(regs)) {
3106 local_irq_restore(flags);
3107 printk(KERN_ERR "%s: Unable to set address byte 1\n",
3108 ap->name);
3109 result = -EIO;
3110 goto eeprom_read_error;
3111 }
3112
3113 eeprom_start(regs);
3114 eeprom_prep(regs, EEPROM_READ_SELECT);
3115 if (eeprom_check_ack(regs)) {
3116 local_irq_restore(flags);
3117 printk(KERN_ERR "%s: Unable to set READ_SELECT\n",
3118 ap->name);
3119 result = -EIO;
3120 goto eeprom_read_error;
3121 }
3122
3123 for (i = 0; i < 8; i++) {
3124 local = readl(&regs->LocalCtrl);
3125 local &= ~EEPROM_WRITE_ENABLE;
3126 writel(local, &regs->LocalCtrl);
3127 readl(&regs->LocalCtrl);
3128 udelay(ACE_LONG_DELAY);
3129 mb();
3130 local |= EEPROM_CLK_OUT;
3131 writel(local, &regs->LocalCtrl);
3132 readl(&regs->LocalCtrl);
3133 mb();
3134 udelay(ACE_SHORT_DELAY);
3135 /* sample data mid high clk */
3136 result = (result << 1) |
3137 ((readl(&regs->LocalCtrl) & EEPROM_DATA_IN) != 0);
3138 udelay(ACE_SHORT_DELAY);
3139 mb();
3140 local = readl(&regs->LocalCtrl);
3141 local &= ~EEPROM_CLK_OUT;
3142 writel(local, &regs->LocalCtrl);
3143 readl(&regs->LocalCtrl);
3144 udelay(ACE_SHORT_DELAY);
3145 mb();
3146 if (i == 7) {
3147 local |= EEPROM_WRITE_ENABLE;
3148 writel(local, &regs->LocalCtrl);
3149 readl(&regs->LocalCtrl);
3150 mb();
3151 udelay(ACE_SHORT_DELAY);
3152 }
3153 }
3154
3155 local |= EEPROM_DATA_OUT;
3156 writel(local, &regs->LocalCtrl);
3157 readl(&regs->LocalCtrl);
3158 mb();
3159 udelay(ACE_SHORT_DELAY);
3160 writel(readl(&regs->LocalCtrl) | EEPROM_CLK_OUT, &regs->LocalCtrl);
3161 readl(&regs->LocalCtrl);
3162 udelay(ACE_LONG_DELAY);
3163 writel(readl(&regs->LocalCtrl) & ~EEPROM_CLK_OUT, &regs->LocalCtrl);
3164 readl(&regs->LocalCtrl);
3165 mb();
3166 udelay(ACE_SHORT_DELAY);
3167 eeprom_stop(regs);
3168
3169 local_irq_restore(flags);
3170 out:
3171 return result;
3172
3173 eeprom_read_error:
3174 printk(KERN_ERR "%s: Unable to read eeprom byte 0x%02lx\n",
3175 ap->name, offset);
3176 goto out;
3177}
3178
3179module_pci_driver(acenic_pci_driver);
3180

source code of linux/drivers/net/ethernet/alteon/acenic.c