blob: 6667e0667a88e15b82c8f0b65564046c9fe88202 [file] [log] [blame]
Jeff Garzik10096972007-08-14 01:24:56 -04001#define VERSION "0.23"
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/* ns83820.c by Benjamin LaHaise with contributions.
3 *
4 * Questions/comments/discussion to linux-ns83820@kvack.org.
5 *
6 * $Revision: 1.34.2.23 $
7 *
8 * Copyright 2001 Benjamin LaHaise.
9 * Copyright 2001, 2002 Red Hat.
10 *
11 * Mmmm, chocolate vanilla mocha...
12 *
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 *
28 *
29 * ChangeLog
30 * =========
31 * 20010414 0.1 - created
32 * 20010622 0.2 - basic rx and tx.
33 * 20010711 0.3 - added duplex and link state detection support.
34 * 20010713 0.4 - zero copy, no hangs.
35 * 0.5 - 64 bit dma support (davem will hate me for this)
36 * - disable jumbo frames to avoid tx hangs
37 * - work around tx deadlocks on my 1.02 card via
38 * fiddling with TXCFG
39 * 20010810 0.6 - use pci dma api for ringbuffers, work on ia64
40 * 20010816 0.7 - misc cleanups
41 * 20010826 0.8 - fix critical zero copy bugs
42 * 0.9 - internal experiment
43 * 20010827 0.10 - fix ia64 unaligned access.
44 * 20010906 0.11 - accept all packets with checksum errors as
45 * otherwise fragments get lost
46 * - fix >> 32 bugs
47 * 0.12 - add statistics counters
48 * - add allmulti/promisc support
49 * 20011009 0.13 - hotplug support, other smaller pci api cleanups
50 * 20011204 0.13a - optical transceiver support added
51 * by Michael Clark <michael@metaparadigm.com>
52 * 20011205 0.13b - call register_netdev earlier in initialization
53 * suppress duplicate link status messages
54 * 20011117 0.14 - ethtool GDRVINFO, GLINK support from jgarzik
55 * 20011204 0.15 get ppc (big endian) working
56 * 20011218 0.16 various cleanups
57 * 20020310 0.17 speedups
58 * 20020610 0.18 - actually use the pci dma api for highmem
59 * - remove pci latency register fiddling
60 * 0.19 - better bist support
61 * - add ihr and reset_phy parameters
62 * - gmii bus probing
63 * - fix missed txok introduced during performance
64 * tuning
65 * 0.20 - fix stupid RFEN thinko. i am such a smurf.
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 * 20040828 0.21 - add hardware vlan accleration
67 * by Neil Horman <nhorman@redhat.com>
Jeff Garzik6aa20a22006-09-13 13:24:59 -040068 * 20050406 0.22 - improved DAC ifdefs from Andi Kleen
Benjamin LaHaisec16ef1c2005-04-06 11:17:59 -040069 * - removal of dead code from Adrian Bunk
70 * - fix half duplex collision behaviour
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 * Driver Overview
72 * ===============
73 *
74 * This driver was originally written for the National Semiconductor
75 * 83820 chip, a 10/100/1000 Mbps 64 bit PCI ethernet NIC. Hopefully
76 * this code will turn out to be a) clean, b) correct, and c) fast.
77 * With that in mind, I'm aiming to split the code up as much as
78 * reasonably possible. At present there are X major sections that
79 * break down into a) packet receive, b) packet transmit, c) link
80 * management, d) initialization and configuration. Where possible,
81 * these code paths are designed to run in parallel.
82 *
83 * This driver has been tested and found to work with the following
84 * cards (in no particular order):
85 *
86 * Cameo SOHO-GA2000T SOHO-GA2500T
87 * D-Link DGE-500T
88 * PureData PDP8023Z-TG
89 * SMC SMC9452TX SMC9462TX
90 * Netgear GA621
91 *
92 * Special thanks to SMC for providing hardware to test this driver on.
93 *
94 * Reports of success or failure would be greatly appreciated.
95 */
96//#define dprintk printk
97#define dprintk(x...) do { } while (0)
98
Linus Torvalds1da177e2005-04-16 15:20:36 -070099#include <linux/module.h>
100#include <linux/moduleparam.h>
101#include <linux/types.h>
102#include <linux/pci.h>
Domen Puncer1e7f0bd2005-06-26 18:22:14 -0400103#include <linux/dma-mapping.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104#include <linux/netdevice.h>
105#include <linux/etherdevice.h>
106#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107#include <linux/workqueue.h>
108#include <linux/init.h>
109#include <linux/ip.h> /* for iph */
110#include <linux/in.h> /* for IPPROTO_... */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111#include <linux/compiler.h>
112#include <linux/prefetch.h>
113#include <linux/ethtool.h>
Alexey Dobriyand43c36d2009-10-07 17:09:06 +0400114#include <linux/sched.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115#include <linux/timer.h>
116#include <linux/if_vlan.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -0200117#include <linux/rtnetlink.h>
Marcelo Feitoza Parisiff5688a2006-01-09 18:37:15 -0800118#include <linux/jiffies.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +0900119#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
121#include <asm/io.h>
122#include <asm/uaccess.h>
123#include <asm/system.h>
124
125#define DRV_NAME "ns83820"
126
127/* Global parameters. See module_param near the bottom. */
128static int ihr = 2;
129static int reset_phy = 0;
130static int lnksts = 0; /* CFG_LNKSTS bit polarity */
131
132/* Dprintk is used for more interesting debug events */
133#undef Dprintk
134#define Dprintk dprintk
135
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136/* tunables */
137#define RX_BUF_SIZE 1500 /* 8192 */
138#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
139#define NS83820_VLAN_ACCEL_SUPPORT
140#endif
141
142/* Must not exceed ~65000. */
143#define NR_RX_DESC 64
144#define NR_TX_DESC 128
145
146/* not tunable */
147#define REAL_RX_BUF_SIZE (RX_BUF_SIZE + 14) /* rx/tx mac addr + type */
148
149#define MIN_TX_DESC_FREE 8
150
151/* register defines */
152#define CFGCS 0x04
153
154#define CR_TXE 0x00000001
155#define CR_TXD 0x00000002
156/* Ramit : Here's a tip, don't do a RXD immediately followed by an RXE
157 * The Receive engine skips one descriptor and moves
158 * onto the next one!! */
159#define CR_RXE 0x00000004
160#define CR_RXD 0x00000008
161#define CR_TXR 0x00000010
162#define CR_RXR 0x00000020
163#define CR_SWI 0x00000080
164#define CR_RST 0x00000100
165
166#define PTSCR_EEBIST_FAIL 0x00000001
167#define PTSCR_EEBIST_EN 0x00000002
168#define PTSCR_EELOAD_EN 0x00000004
169#define PTSCR_RBIST_FAIL 0x000001b8
170#define PTSCR_RBIST_DONE 0x00000200
171#define PTSCR_RBIST_EN 0x00000400
172#define PTSCR_RBIST_RST 0x00002000
173
174#define MEAR_EEDI 0x00000001
175#define MEAR_EEDO 0x00000002
176#define MEAR_EECLK 0x00000004
177#define MEAR_EESEL 0x00000008
178#define MEAR_MDIO 0x00000010
179#define MEAR_MDDIR 0x00000020
180#define MEAR_MDC 0x00000040
181
182#define ISR_TXDESC3 0x40000000
183#define ISR_TXDESC2 0x20000000
184#define ISR_TXDESC1 0x10000000
185#define ISR_TXDESC0 0x08000000
186#define ISR_RXDESC3 0x04000000
187#define ISR_RXDESC2 0x02000000
188#define ISR_RXDESC1 0x01000000
189#define ISR_RXDESC0 0x00800000
190#define ISR_TXRCMP 0x00400000
191#define ISR_RXRCMP 0x00200000
192#define ISR_DPERR 0x00100000
193#define ISR_SSERR 0x00080000
194#define ISR_RMABT 0x00040000
195#define ISR_RTABT 0x00020000
196#define ISR_RXSOVR 0x00010000
197#define ISR_HIBINT 0x00008000
198#define ISR_PHY 0x00004000
199#define ISR_PME 0x00002000
200#define ISR_SWI 0x00001000
201#define ISR_MIB 0x00000800
202#define ISR_TXURN 0x00000400
203#define ISR_TXIDLE 0x00000200
204#define ISR_TXERR 0x00000100
205#define ISR_TXDESC 0x00000080
206#define ISR_TXOK 0x00000040
207#define ISR_RXORN 0x00000020
208#define ISR_RXIDLE 0x00000010
209#define ISR_RXEARLY 0x00000008
210#define ISR_RXERR 0x00000004
211#define ISR_RXDESC 0x00000002
212#define ISR_RXOK 0x00000001
213
214#define TXCFG_CSI 0x80000000
215#define TXCFG_HBI 0x40000000
216#define TXCFG_MLB 0x20000000
217#define TXCFG_ATP 0x10000000
218#define TXCFG_ECRETRY 0x00800000
219#define TXCFG_BRST_DIS 0x00080000
220#define TXCFG_MXDMA1024 0x00000000
221#define TXCFG_MXDMA512 0x00700000
222#define TXCFG_MXDMA256 0x00600000
223#define TXCFG_MXDMA128 0x00500000
224#define TXCFG_MXDMA64 0x00400000
225#define TXCFG_MXDMA32 0x00300000
226#define TXCFG_MXDMA16 0x00200000
227#define TXCFG_MXDMA8 0x00100000
228
229#define CFG_LNKSTS 0x80000000
230#define CFG_SPDSTS 0x60000000
231#define CFG_SPDSTS1 0x40000000
232#define CFG_SPDSTS0 0x20000000
233#define CFG_DUPSTS 0x10000000
234#define CFG_TBI_EN 0x01000000
235#define CFG_MODE_1000 0x00400000
236/* Ramit : Dont' ever use AUTO_1000, it never works and is buggy.
237 * Read the Phy response and then configure the MAC accordingly */
238#define CFG_AUTO_1000 0x00200000
239#define CFG_PINT_CTL 0x001c0000
240#define CFG_PINT_DUPSTS 0x00100000
241#define CFG_PINT_LNKSTS 0x00080000
242#define CFG_PINT_SPDSTS 0x00040000
243#define CFG_TMRTEST 0x00020000
244#define CFG_MRM_DIS 0x00010000
245#define CFG_MWI_DIS 0x00008000
246#define CFG_T64ADDR 0x00004000
247#define CFG_PCI64_DET 0x00002000
248#define CFG_DATA64_EN 0x00001000
249#define CFG_M64ADDR 0x00000800
250#define CFG_PHY_RST 0x00000400
251#define CFG_PHY_DIS 0x00000200
252#define CFG_EXTSTS_EN 0x00000100
253#define CFG_REQALG 0x00000080
254#define CFG_SB 0x00000040
255#define CFG_POW 0x00000020
256#define CFG_EXD 0x00000010
257#define CFG_PESEL 0x00000008
258#define CFG_BROM_DIS 0x00000004
259#define CFG_EXT_125 0x00000002
260#define CFG_BEM 0x00000001
261
262#define EXTSTS_UDPPKT 0x00200000
263#define EXTSTS_TCPPKT 0x00080000
264#define EXTSTS_IPPKT 0x00020000
265#define EXTSTS_VPKT 0x00010000
266#define EXTSTS_VTG_MASK 0x0000ffff
267
268#define SPDSTS_POLARITY (CFG_SPDSTS1 | CFG_SPDSTS0 | CFG_DUPSTS | (lnksts ? CFG_LNKSTS : 0))
269
270#define MIBC_MIBS 0x00000008
271#define MIBC_ACLR 0x00000004
272#define MIBC_FRZ 0x00000002
273#define MIBC_WRN 0x00000001
274
275#define PCR_PSEN (1 << 31)
276#define PCR_PS_MCAST (1 << 30)
277#define PCR_PS_DA (1 << 29)
278#define PCR_STHI_8 (3 << 23)
279#define PCR_STLO_4 (1 << 23)
280#define PCR_FFHI_8K (3 << 21)
281#define PCR_FFLO_4K (1 << 21)
282#define PCR_PAUSE_CNT 0xFFFE
283
284#define RXCFG_AEP 0x80000000
285#define RXCFG_ARP 0x40000000
286#define RXCFG_STRIPCRC 0x20000000
287#define RXCFG_RX_FD 0x10000000
288#define RXCFG_ALP 0x08000000
289#define RXCFG_AIRL 0x04000000
290#define RXCFG_MXDMA512 0x00700000
291#define RXCFG_DRTH 0x0000003e
292#define RXCFG_DRTH0 0x00000002
293
294#define RFCR_RFEN 0x80000000
295#define RFCR_AAB 0x40000000
296#define RFCR_AAM 0x20000000
297#define RFCR_AAU 0x10000000
298#define RFCR_APM 0x08000000
299#define RFCR_APAT 0x07800000
300#define RFCR_APAT3 0x04000000
301#define RFCR_APAT2 0x02000000
302#define RFCR_APAT1 0x01000000
303#define RFCR_APAT0 0x00800000
304#define RFCR_AARP 0x00400000
305#define RFCR_MHEN 0x00200000
306#define RFCR_UHEN 0x00100000
307#define RFCR_ULM 0x00080000
308
309#define VRCR_RUDPE 0x00000080
310#define VRCR_RTCPE 0x00000040
311#define VRCR_RIPE 0x00000020
312#define VRCR_IPEN 0x00000010
313#define VRCR_DUTF 0x00000008
314#define VRCR_DVTF 0x00000004
315#define VRCR_VTREN 0x00000002
316#define VRCR_VTDEN 0x00000001
317
318#define VTCR_PPCHK 0x00000008
319#define VTCR_GCHK 0x00000004
320#define VTCR_VPPTI 0x00000002
321#define VTCR_VGTI 0x00000001
322
323#define CR 0x00
324#define CFG 0x04
325#define MEAR 0x08
326#define PTSCR 0x0c
327#define ISR 0x10
328#define IMR 0x14
329#define IER 0x18
330#define IHR 0x1c
331#define TXDP 0x20
332#define TXDP_HI 0x24
333#define TXCFG 0x28
334#define GPIOR 0x2c
335#define RXDP 0x30
336#define RXDP_HI 0x34
337#define RXCFG 0x38
338#define PQCR 0x3c
339#define WCSR 0x40
340#define PCR 0x44
341#define RFCR 0x48
342#define RFDR 0x4c
343
344#define SRR 0x58
345
346#define VRCR 0xbc
347#define VTCR 0xc0
348#define VDR 0xc4
349#define CCSR 0xcc
350
351#define TBICR 0xe0
352#define TBISR 0xe4
353#define TANAR 0xe8
354#define TANLPAR 0xec
355#define TANER 0xf0
356#define TESR 0xf4
357
358#define TBICR_MR_AN_ENABLE 0x00001000
359#define TBICR_MR_RESTART_AN 0x00000200
360
361#define TBISR_MR_LINK_STATUS 0x00000020
362#define TBISR_MR_AN_COMPLETE 0x00000004
363
364#define TANAR_PS2 0x00000100
365#define TANAR_PS1 0x00000080
366#define TANAR_HALF_DUP 0x00000040
367#define TANAR_FULL_DUP 0x00000020
368
369#define GPIOR_GP5_OE 0x00000200
370#define GPIOR_GP4_OE 0x00000100
371#define GPIOR_GP3_OE 0x00000080
372#define GPIOR_GP2_OE 0x00000040
373#define GPIOR_GP1_OE 0x00000020
374#define GPIOR_GP3_OUT 0x00000004
375#define GPIOR_GP1_OUT 0x00000001
376
377#define LINK_AUTONEGOTIATE 0x01
378#define LINK_DOWN 0x02
379#define LINK_UP 0x04
380
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400381#define HW_ADDR_LEN sizeof(dma_addr_t)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382#define desc_addr_set(desc, addr) \
383 do { \
Benjamin LaHaisec16ef1c2005-04-06 11:17:59 -0400384 ((desc)[0] = cpu_to_le32(addr)); \
385 if (HW_ADDR_LEN == 8) \
386 (desc)[1] = cpu_to_le32(((u64)addr) >> 32); \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 } while(0)
388#define desc_addr_get(desc) \
Benjamin LaHaisec16ef1c2005-04-06 11:17:59 -0400389 (le32_to_cpu((desc)[0]) | \
390 (HW_ADDR_LEN == 8 ? ((dma_addr_t)le32_to_cpu((desc)[1]))<<32 : 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
392#define DESC_LINK 0
393#define DESC_BUFPTR (DESC_LINK + HW_ADDR_LEN/4)
394#define DESC_CMDSTS (DESC_BUFPTR + HW_ADDR_LEN/4)
395#define DESC_EXTSTS (DESC_CMDSTS + 4/4)
396
397#define CMDSTS_OWN 0x80000000
398#define CMDSTS_MORE 0x40000000
399#define CMDSTS_INTR 0x20000000
400#define CMDSTS_ERR 0x10000000
401#define CMDSTS_OK 0x08000000
402#define CMDSTS_RUNT 0x00200000
403#define CMDSTS_LEN_MASK 0x0000ffff
404
405#define CMDSTS_DEST_MASK 0x01800000
406#define CMDSTS_DEST_SELF 0x00800000
407#define CMDSTS_DEST_MULTI 0x01000000
408
409#define DESC_SIZE 8 /* Should be cache line sized */
410
411struct rx_info {
412 spinlock_t lock;
413 int up;
Hannes Eder5d7dce72009-02-14 11:12:36 +0000414 unsigned long idle;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
416 struct sk_buff *skbs[NR_RX_DESC];
417
Al Viroc69fda42006-11-20 14:12:54 -0500418 __le32 *next_rx_desc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 u16 next_rx, next_empty;
420
Al Viroc69fda42006-11-20 14:12:54 -0500421 __le32 *descs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 dma_addr_t phy_descs;
423};
424
425
426struct ns83820 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 u8 __iomem *base;
428
429 struct pci_dev *pci_dev;
David Howellsc4028952006-11-22 14:57:56 +0000430 struct net_device *ndev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432#ifdef NS83820_VLAN_ACCEL_SUPPORT
433 struct vlan_group *vlgrp;
434#endif
435
436 struct rx_info rx_info;
437 struct tasklet_struct rx_tasklet;
438
439 unsigned ihr;
440 struct work_struct tq_refill;
441
442 /* protects everything below. irqsave when using. */
443 spinlock_t misc_lock;
444
445 u32 CFG_cache;
446
447 u32 MEAR_cache;
448 u32 IMR_cache;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449
450 unsigned linkstate;
451
452 spinlock_t tx_lock;
453
454 u16 tx_done_idx;
455 u16 tx_idx;
456 volatile u16 tx_free_idx; /* idx of free desc chain */
457 u16 tx_intr_idx;
458
459 atomic_t nr_tx_skbs;
460 struct sk_buff *tx_skbs[NR_TX_DESC];
461
462 char pad[16] __attribute__((aligned(16)));
Al Viroc69fda42006-11-20 14:12:54 -0500463 __le32 *tx_descs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 dma_addr_t tx_phy_descs;
465
466 struct timer_list tx_watchdog;
467};
468
469static inline struct ns83820 *PRIV(struct net_device *dev)
470{
471 return netdev_priv(dev);
472}
473
474#define __kick_rx(dev) writel(CR_RXE, dev->base + CR)
475
476static inline void kick_rx(struct net_device *ndev)
477{
478 struct ns83820 *dev = PRIV(ndev);
479 dprintk("kick_rx: maybe kicking\n");
480 if (test_and_clear_bit(0, &dev->rx_info.idle)) {
481 dprintk("actually kicking\n");
482 writel(dev->rx_info.phy_descs +
483 (4 * DESC_SIZE * dev->rx_info.next_rx),
484 dev->base + RXDP);
485 if (dev->rx_info.next_rx == dev->rx_info.next_empty)
486 printk(KERN_DEBUG "%s: uh-oh: next_rx == next_empty???\n",
487 ndev->name);
488 __kick_rx(dev);
489 }
490}
491
492//free = (tx_done_idx + NR_TX_DESC-2 - free_idx) % NR_TX_DESC
493#define start_tx_okay(dev) \
494 (((NR_TX_DESC-2 + dev->tx_done_idx - dev->tx_free_idx) % NR_TX_DESC) > MIN_TX_DESC_FREE)
495
496
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400497#ifdef NS83820_VLAN_ACCEL_SUPPORT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498static void ns83820_vlan_rx_register(struct net_device *ndev, struct vlan_group *grp)
499{
500 struct ns83820 *dev = PRIV(ndev);
501
502 spin_lock_irq(&dev->misc_lock);
503 spin_lock(&dev->tx_lock);
504
505 dev->vlgrp = grp;
506
507 spin_unlock(&dev->tx_lock);
508 spin_unlock_irq(&dev->misc_lock);
509}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510#endif
511
512/* Packet Receiver
513 *
514 * The hardware supports linked lists of receive descriptors for
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300515 * which ownership is transferred back and forth by means of an
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 * ownership bit. While the hardware does support the use of a
517 * ring for receive descriptors, we only make use of a chain in
518 * an attempt to reduce bus traffic under heavy load scenarios.
519 * This will also make bugs a bit more obvious. The current code
520 * only makes use of a single rx chain; I hope to implement
521 * priority based rx for version 1.0. Goal: even under overload
522 * conditions, still route realtime traffic with as low jitter as
523 * possible.
524 */
Al Viroc69fda42006-11-20 14:12:54 -0500525static inline void build_rx_desc(struct ns83820 *dev, __le32 *desc, dma_addr_t link, dma_addr_t buf, u32 cmdsts, u32 extsts)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526{
527 desc_addr_set(desc + DESC_LINK, link);
528 desc_addr_set(desc + DESC_BUFPTR, buf);
529 desc[DESC_EXTSTS] = cpu_to_le32(extsts);
530 mb();
531 desc[DESC_CMDSTS] = cpu_to_le32(cmdsts);
532}
533
534#define nr_rx_empty(dev) ((NR_RX_DESC-2 + dev->rx_info.next_rx - dev->rx_info.next_empty) % NR_RX_DESC)
535static inline int ns83820_add_rx_skb(struct ns83820 *dev, struct sk_buff *skb)
536{
537 unsigned next_empty;
538 u32 cmdsts;
Al Viroc69fda42006-11-20 14:12:54 -0500539 __le32 *sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 dma_addr_t buf;
541
542 next_empty = dev->rx_info.next_empty;
543
544 /* don't overrun last rx marker */
545 if (unlikely(nr_rx_empty(dev) <= 2)) {
546 kfree_skb(skb);
547 return 1;
548 }
549
550#if 0
551 dprintk("next_empty[%d] nr_used[%d] next_rx[%d]\n",
552 dev->rx_info.next_empty,
553 dev->rx_info.nr_used,
554 dev->rx_info.next_rx
555 );
556#endif
557
558 sg = dev->rx_info.descs + (next_empty * DESC_SIZE);
Eric Sesterhenn5d9428d2006-04-02 13:52:48 +0200559 BUG_ON(NULL != dev->rx_info.skbs[next_empty]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 dev->rx_info.skbs[next_empty] = skb;
561
562 dev->rx_info.next_empty = (next_empty + 1) % NR_RX_DESC;
563 cmdsts = REAL_RX_BUF_SIZE | CMDSTS_INTR;
David S. Miller689be432005-06-28 15:25:31 -0700564 buf = pci_map_single(dev->pci_dev, skb->data,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 REAL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
566 build_rx_desc(dev, sg, 0, buf, cmdsts, 0);
567 /* update link of previous rx */
568 if (likely(next_empty != dev->rx_info.next_rx))
569 dev->rx_info.descs[((NR_RX_DESC + next_empty - 1) % NR_RX_DESC) * DESC_SIZE] = cpu_to_le32(dev->rx_info.phy_descs + (next_empty * DESC_SIZE * 4));
570
571 return 0;
572}
573
Al Virodd0fc662005-10-07 07:46:04 +0100574static inline int rx_refill(struct net_device *ndev, gfp_t gfp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575{
576 struct ns83820 *dev = PRIV(ndev);
577 unsigned i;
578 unsigned long flags = 0;
579
580 if (unlikely(nr_rx_empty(dev) <= 2))
581 return 0;
582
583 dprintk("rx_refill(%p)\n", ndev);
584 if (gfp == GFP_ATOMIC)
585 spin_lock_irqsave(&dev->rx_info.lock, flags);
586 for (i=0; i<NR_RX_DESC; i++) {
587 struct sk_buff *skb;
588 long res;
Stephen Hemmingere83728c2008-04-16 16:37:35 -0700589
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 /* extra 16 bytes for alignment */
Stephen Hemmingere83728c2008-04-16 16:37:35 -0700591 skb = __netdev_alloc_skb(ndev, REAL_RX_BUF_SIZE+16, gfp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 if (unlikely(!skb))
593 break;
594
Stephen Hemmingere83728c2008-04-16 16:37:35 -0700595 skb_reserve(skb, skb->data - PTR_ALIGN(skb->data, 16));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 if (gfp != GFP_ATOMIC)
597 spin_lock_irqsave(&dev->rx_info.lock, flags);
598 res = ns83820_add_rx_skb(dev, skb);
599 if (gfp != GFP_ATOMIC)
600 spin_unlock_irqrestore(&dev->rx_info.lock, flags);
601 if (res) {
602 i = 1;
603 break;
604 }
605 }
606 if (gfp == GFP_ATOMIC)
607 spin_unlock_irqrestore(&dev->rx_info.lock, flags);
608
609 return i ? 0 : -ENOMEM;
610}
611
David Miller7eefb042007-12-20 04:14:42 -0800612static void rx_refill_atomic(struct net_device *ndev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613{
614 rx_refill(ndev, GFP_ATOMIC);
615}
616
617/* REFILL */
David Howellsc4028952006-11-22 14:57:56 +0000618static inline void queue_refill(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619{
David Howellsc4028952006-11-22 14:57:56 +0000620 struct ns83820 *dev = container_of(work, struct ns83820, tq_refill);
621 struct net_device *ndev = dev->ndev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622
623 rx_refill(ndev, GFP_KERNEL);
624 if (dev->rx_info.up)
625 kick_rx(ndev);
626}
627
628static inline void clear_rx_desc(struct ns83820 *dev, unsigned i)
629{
630 build_rx_desc(dev, dev->rx_info.descs + (DESC_SIZE * i), 0, 0, CMDSTS_OWN, 0);
631}
632
David Miller7eefb042007-12-20 04:14:42 -0800633static void phy_intr(struct net_device *ndev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634{
635 struct ns83820 *dev = PRIV(ndev);
Arjan van de Venf71e1302006-03-03 21:33:57 -0500636 static const char *speeds[] = { "10", "100", "1000", "1000(?)", "1000F" };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 u32 cfg, new_cfg;
638 u32 tbisr, tanar, tanlpar;
639 int speed, fullduplex, newlinkstate;
640
641 cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY;
642
643 if (dev->CFG_cache & CFG_TBI_EN) {
644 /* we have an optical transceiver */
645 tbisr = readl(dev->base + TBISR);
646 tanar = readl(dev->base + TANAR);
647 tanlpar = readl(dev->base + TANLPAR);
648 dprintk("phy_intr: tbisr=%08x, tanar=%08x, tanlpar=%08x\n",
649 tbisr, tanar, tanlpar);
650
Joe Perches8e95a202009-12-03 07:58:21 +0000651 if ( (fullduplex = (tanlpar & TANAR_FULL_DUP) &&
652 (tanar & TANAR_FULL_DUP)) ) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653
654 /* both of us are full duplex */
655 writel(readl(dev->base + TXCFG)
656 | TXCFG_CSI | TXCFG_HBI | TXCFG_ATP,
657 dev->base + TXCFG);
658 writel(readl(dev->base + RXCFG) | RXCFG_RX_FD,
659 dev->base + RXCFG);
660 /* Light up full duplex LED */
661 writel(readl(dev->base + GPIOR) | GPIOR_GP1_OUT,
662 dev->base + GPIOR);
663
Joe Perches8e95a202009-12-03 07:58:21 +0000664 } else if (((tanlpar & TANAR_HALF_DUP) &&
665 (tanar & TANAR_HALF_DUP)) ||
666 ((tanlpar & TANAR_FULL_DUP) &&
667 (tanar & TANAR_HALF_DUP)) ||
668 ((tanlpar & TANAR_HALF_DUP) &&
669 (tanar & TANAR_FULL_DUP))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670
671 /* one or both of us are half duplex */
672 writel((readl(dev->base + TXCFG)
673 & ~(TXCFG_CSI | TXCFG_HBI)) | TXCFG_ATP,
674 dev->base + TXCFG);
675 writel(readl(dev->base + RXCFG) & ~RXCFG_RX_FD,
676 dev->base + RXCFG);
677 /* Turn off full duplex LED */
678 writel(readl(dev->base + GPIOR) & ~GPIOR_GP1_OUT,
679 dev->base + GPIOR);
680 }
681
682 speed = 4; /* 1000F */
683
684 } else {
685 /* we have a copper transceiver */
686 new_cfg = dev->CFG_cache & ~(CFG_SB | CFG_MODE_1000 | CFG_SPDSTS);
687
688 if (cfg & CFG_SPDSTS1)
689 new_cfg |= CFG_MODE_1000;
690 else
691 new_cfg &= ~CFG_MODE_1000;
692
693 speed = ((cfg / CFG_SPDSTS0) & 3);
694 fullduplex = (cfg & CFG_DUPSTS);
695
Benjamin LaHaisec16ef1c2005-04-06 11:17:59 -0400696 if (fullduplex) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 new_cfg |= CFG_SB;
Benjamin LaHaisec16ef1c2005-04-06 11:17:59 -0400698 writel(readl(dev->base + TXCFG)
699 | TXCFG_CSI | TXCFG_HBI,
700 dev->base + TXCFG);
701 writel(readl(dev->base + RXCFG) | RXCFG_RX_FD,
702 dev->base + RXCFG);
703 } else {
704 writel(readl(dev->base + TXCFG)
705 & ~(TXCFG_CSI | TXCFG_HBI),
706 dev->base + TXCFG);
707 writel(readl(dev->base + RXCFG) & ~(RXCFG_RX_FD),
708 dev->base + RXCFG);
709 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710
711 if ((cfg & CFG_LNKSTS) &&
Benjamin LaHaisec16ef1c2005-04-06 11:17:59 -0400712 ((new_cfg ^ dev->CFG_cache) != 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 writel(new_cfg, dev->base + CFG);
714 dev->CFG_cache = new_cfg;
715 }
716
717 dev->CFG_cache &= ~CFG_SPDSTS;
718 dev->CFG_cache |= cfg & CFG_SPDSTS;
719 }
720
721 newlinkstate = (cfg & CFG_LNKSTS) ? LINK_UP : LINK_DOWN;
722
Joe Perches8e95a202009-12-03 07:58:21 +0000723 if (newlinkstate & LINK_UP &&
724 dev->linkstate != newlinkstate) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 netif_start_queue(ndev);
726 netif_wake_queue(ndev);
727 printk(KERN_INFO "%s: link now %s mbps, %s duplex and up.\n",
728 ndev->name,
729 speeds[speed],
730 fullduplex ? "full" : "half");
Joe Perches8e95a202009-12-03 07:58:21 +0000731 } else if (newlinkstate & LINK_DOWN &&
732 dev->linkstate != newlinkstate) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 netif_stop_queue(ndev);
734 printk(KERN_INFO "%s: link now down.\n", ndev->name);
735 }
736
737 dev->linkstate = newlinkstate;
738}
739
740static int ns83820_setup_rx(struct net_device *ndev)
741{
742 struct ns83820 *dev = PRIV(ndev);
743 unsigned i;
744 int ret;
745
746 dprintk("ns83820_setup_rx(%p)\n", ndev);
747
748 dev->rx_info.idle = 1;
749 dev->rx_info.next_rx = 0;
750 dev->rx_info.next_rx_desc = dev->rx_info.descs;
751 dev->rx_info.next_empty = 0;
752
753 for (i=0; i<NR_RX_DESC; i++)
754 clear_rx_desc(dev, i);
755
756 writel(0, dev->base + RXDP_HI);
757 writel(dev->rx_info.phy_descs, dev->base + RXDP);
758
759 ret = rx_refill(ndev, GFP_KERNEL);
760 if (!ret) {
761 dprintk("starting receiver\n");
762 /* prevent the interrupt handler from stomping on us */
763 spin_lock_irq(&dev->rx_info.lock);
764
765 writel(0x0001, dev->base + CCSR);
766 writel(0, dev->base + RFCR);
767 writel(0x7fc00000, dev->base + RFCR);
768 writel(0xffc00000, dev->base + RFCR);
769
770 dev->rx_info.up = 1;
771
772 phy_intr(ndev);
773
774 /* Okay, let it rip */
Dan Carpentercdd861d2010-10-13 09:18:53 +0000775 spin_lock(&dev->misc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 dev->IMR_cache |= ISR_PHY;
777 dev->IMR_cache |= ISR_RXRCMP;
778 //dev->IMR_cache |= ISR_RXERR;
779 //dev->IMR_cache |= ISR_RXOK;
780 dev->IMR_cache |= ISR_RXORN;
781 dev->IMR_cache |= ISR_RXSOVR;
782 dev->IMR_cache |= ISR_RXDESC;
783 dev->IMR_cache |= ISR_RXIDLE;
784 dev->IMR_cache |= ISR_TXDESC;
785 dev->IMR_cache |= ISR_TXIDLE;
786
787 writel(dev->IMR_cache, dev->base + IMR);
788 writel(1, dev->base + IER);
Ingo Molnar3a10cce2006-06-30 02:25:06 -0700789 spin_unlock(&dev->misc_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790
791 kick_rx(ndev);
792
793 spin_unlock_irq(&dev->rx_info.lock);
794 }
795 return ret;
796}
797
798static void ns83820_cleanup_rx(struct ns83820 *dev)
799{
800 unsigned i;
801 unsigned long flags;
802
803 dprintk("ns83820_cleanup_rx(%p)\n", dev);
804
805 /* disable receive interrupts */
806 spin_lock_irqsave(&dev->misc_lock, flags);
807 dev->IMR_cache &= ~(ISR_RXOK | ISR_RXDESC | ISR_RXERR | ISR_RXEARLY | ISR_RXIDLE);
808 writel(dev->IMR_cache, dev->base + IMR);
809 spin_unlock_irqrestore(&dev->misc_lock, flags);
810
811 /* synchronize with the interrupt handler and kill it */
812 dev->rx_info.up = 0;
813 synchronize_irq(dev->pci_dev->irq);
814
815 /* touch the pci bus... */
816 readl(dev->base + IMR);
817
818 /* assumes the transmitter is already disabled and reset */
819 writel(0, dev->base + RXDP_HI);
820 writel(0, dev->base + RXDP);
821
822 for (i=0; i<NR_RX_DESC; i++) {
823 struct sk_buff *skb = dev->rx_info.skbs[i];
824 dev->rx_info.skbs[i] = NULL;
825 clear_rx_desc(dev, i);
Wei Yongjun893d7de2009-02-25 00:47:26 +0000826 kfree_skb(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827 }
828}
829
David Miller7eefb042007-12-20 04:14:42 -0800830static void ns83820_rx_kick(struct net_device *ndev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831{
832 struct ns83820 *dev = PRIV(ndev);
833 /*if (nr_rx_empty(dev) >= NR_RX_DESC/4)*/ {
834 if (dev->rx_info.up) {
835 rx_refill_atomic(ndev);
836 kick_rx(ndev);
837 }
838 }
839
840 if (dev->rx_info.up && nr_rx_empty(dev) > NR_RX_DESC*3/4)
841 schedule_work(&dev->tq_refill);
842 else
843 kick_rx(ndev);
844 if (dev->rx_info.idle)
845 printk(KERN_DEBUG "%s: BAD\n", ndev->name);
846}
847
848/* rx_irq
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400849 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 */
David Miller7eefb042007-12-20 04:14:42 -0800851static void rx_irq(struct net_device *ndev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852{
853 struct ns83820 *dev = PRIV(ndev);
854 struct rx_info *info = &dev->rx_info;
855 unsigned next_rx;
856 int rx_rc, len;
Al Viroc69fda42006-11-20 14:12:54 -0500857 u32 cmdsts;
858 __le32 *desc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 unsigned long flags;
860 int nr = 0;
861
862 dprintk("rx_irq(%p)\n", ndev);
863 dprintk("rxdp: %08x, descs: %08lx next_rx[%d]: %p next_empty[%d]: %p\n",
864 readl(dev->base + RXDP),
865 (long)(dev->rx_info.phy_descs),
866 (int)dev->rx_info.next_rx,
867 (dev->rx_info.descs + (DESC_SIZE * dev->rx_info.next_rx)),
868 (int)dev->rx_info.next_empty,
869 (dev->rx_info.descs + (DESC_SIZE * dev->rx_info.next_empty))
870 );
871
872 spin_lock_irqsave(&info->lock, flags);
873 if (!info->up)
874 goto out;
875
876 dprintk("walking descs\n");
877 next_rx = info->next_rx;
878 desc = info->next_rx_desc;
879 while ((CMDSTS_OWN & (cmdsts = le32_to_cpu(desc[DESC_CMDSTS]))) &&
880 (cmdsts != CMDSTS_OWN)) {
881 struct sk_buff *skb;
882 u32 extsts = le32_to_cpu(desc[DESC_EXTSTS]);
883 dma_addr_t bufptr = desc_addr_get(desc + DESC_BUFPTR);
884
885 dprintk("cmdsts: %08x\n", cmdsts);
886 dprintk("link: %08x\n", cpu_to_le32(desc[DESC_LINK]));
887 dprintk("extsts: %08x\n", extsts);
888
889 skb = info->skbs[next_rx];
890 info->skbs[next_rx] = NULL;
891 info->next_rx = (next_rx + 1) % NR_RX_DESC;
892
893 mb();
894 clear_rx_desc(dev, next_rx);
895
896 pci_unmap_single(dev->pci_dev, bufptr,
897 RX_BUF_SIZE, PCI_DMA_FROMDEVICE);
898 len = cmdsts & CMDSTS_LEN_MASK;
899#ifdef NS83820_VLAN_ACCEL_SUPPORT
900 /* NH: As was mentioned below, this chip is kinda
901 * brain dead about vlan tag stripping. Frames
902 * that are 64 bytes with a vlan header appended
903 * like arp frames, or pings, are flagged as Runts
904 * when the tag is stripped and hardware. This
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400905 * also means that the OK bit in the descriptor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 * is cleared when the frame comes in so we have
907 * to do a specific length check here to make sure
908 * the frame would have been ok, had we not stripped
909 * the tag.
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400910 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 if (likely((CMDSTS_OK & cmdsts) ||
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400912 ((cmdsts & CMDSTS_RUNT) && len >= 56))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913#else
914 if (likely(CMDSTS_OK & cmdsts)) {
915#endif
916 skb_put(skb, len);
917 if (unlikely(!skb))
918 goto netdev_mangle_me_harder_failed;
919 if (cmdsts & CMDSTS_DEST_MULTI)
Kulikov Vasiliye929bc32010-07-05 02:14:28 +0000920 ndev->stats.multicast++;
921 ndev->stats.rx_packets++;
922 ndev->stats.rx_bytes += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700923 if ((extsts & 0x002a0000) && !(extsts & 0x00540000)) {
924 skb->ip_summed = CHECKSUM_UNNECESSARY;
925 } else {
Eric Dumazetbc8acf22010-09-02 13:07:41 -0700926 skb_checksum_none_assert(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 }
928 skb->protocol = eth_type_trans(skb, ndev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400929#ifdef NS83820_VLAN_ACCEL_SUPPORT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 if(extsts & EXTSTS_VPKT) {
931 unsigned short tag;
932 tag = ntohs(extsts & EXTSTS_VTG_MASK);
933 rx_rc = vlan_hwaccel_rx(skb,dev->vlgrp,tag);
934 } else {
935 rx_rc = netif_rx(skb);
936 }
937#else
938 rx_rc = netif_rx(skb);
939#endif
940 if (NET_RX_DROP == rx_rc) {
941netdev_mangle_me_harder_failed:
Kulikov Vasiliye929bc32010-07-05 02:14:28 +0000942 ndev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 }
944 } else {
945 kfree_skb(skb);
946 }
947
948 nr++;
949 next_rx = info->next_rx;
950 desc = info->descs + (DESC_SIZE * next_rx);
951 }
952 info->next_rx = next_rx;
953 info->next_rx_desc = info->descs + (DESC_SIZE * next_rx);
954
955out:
956 if (0 && !nr) {
957 Dprintk("dazed: cmdsts_f: %08x\n", cmdsts);
958 }
959
960 spin_unlock_irqrestore(&info->lock, flags);
961}
962
963static void rx_action(unsigned long _dev)
964{
965 struct net_device *ndev = (void *)_dev;
966 struct ns83820 *dev = PRIV(ndev);
967 rx_irq(ndev);
968 writel(ihr, dev->base + IHR);
969
970 spin_lock_irq(&dev->misc_lock);
971 dev->IMR_cache |= ISR_RXDESC;
972 writel(dev->IMR_cache, dev->base + IMR);
973 spin_unlock_irq(&dev->misc_lock);
974
975 rx_irq(ndev);
976 ns83820_rx_kick(ndev);
977}
978
979/* Packet Transmit code
980 */
981static inline void kick_tx(struct ns83820 *dev)
982{
983 dprintk("kick_tx(%p): tx_idx=%d free_idx=%d\n",
984 dev, dev->tx_idx, dev->tx_free_idx);
985 writel(CR_TXE, dev->base + CR);
986}
987
988/* No spinlock needed on the transmit irq path as the interrupt handler is
989 * serialized.
990 */
991static void do_tx_done(struct net_device *ndev)
992{
993 struct ns83820 *dev = PRIV(ndev);
Al Viroc69fda42006-11-20 14:12:54 -0500994 u32 cmdsts, tx_done_idx;
995 __le32 *desc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 dprintk("do_tx_done(%p)\n", ndev);
998 tx_done_idx = dev->tx_done_idx;
999 desc = dev->tx_descs + (tx_done_idx * DESC_SIZE);
1000
1001 dprintk("tx_done_idx=%d free_idx=%d cmdsts=%08x\n",
1002 tx_done_idx, dev->tx_free_idx, le32_to_cpu(desc[DESC_CMDSTS]));
1003 while ((tx_done_idx != dev->tx_free_idx) &&
1004 !(CMDSTS_OWN & (cmdsts = le32_to_cpu(desc[DESC_CMDSTS]))) ) {
1005 struct sk_buff *skb;
1006 unsigned len;
1007 dma_addr_t addr;
1008
1009 if (cmdsts & CMDSTS_ERR)
Kulikov Vasiliye929bc32010-07-05 02:14:28 +00001010 ndev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011 if (cmdsts & CMDSTS_OK)
Kulikov Vasiliye929bc32010-07-05 02:14:28 +00001012 ndev->stats.tx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 if (cmdsts & CMDSTS_OK)
Kulikov Vasiliye929bc32010-07-05 02:14:28 +00001014 ndev->stats.tx_bytes += cmdsts & 0xffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015
1016 dprintk("tx_done_idx=%d free_idx=%d cmdsts=%08x\n",
1017 tx_done_idx, dev->tx_free_idx, cmdsts);
1018 skb = dev->tx_skbs[tx_done_idx];
1019 dev->tx_skbs[tx_done_idx] = NULL;
1020 dprintk("done(%p)\n", skb);
1021
1022 len = cmdsts & CMDSTS_LEN_MASK;
1023 addr = desc_addr_get(desc + DESC_BUFPTR);
1024 if (skb) {
1025 pci_unmap_single(dev->pci_dev,
1026 addr,
1027 len,
1028 PCI_DMA_TODEVICE);
1029 dev_kfree_skb_irq(skb);
1030 atomic_dec(&dev->nr_tx_skbs);
1031 } else
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001032 pci_unmap_page(dev->pci_dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 addr,
1034 len,
1035 PCI_DMA_TODEVICE);
1036
1037 tx_done_idx = (tx_done_idx + 1) % NR_TX_DESC;
1038 dev->tx_done_idx = tx_done_idx;
1039 desc[DESC_CMDSTS] = cpu_to_le32(0);
1040 mb();
1041 desc = dev->tx_descs + (tx_done_idx * DESC_SIZE);
1042 }
1043
1044 /* Allow network stack to resume queueing packets after we've
1045 * finished transmitting at least 1/4 of the packets in the queue.
1046 */
1047 if (netif_queue_stopped(ndev) && start_tx_okay(dev)) {
1048 dprintk("start_queue(%p)\n", ndev);
1049 netif_start_queue(ndev);
1050 netif_wake_queue(ndev);
1051 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052}
1053
1054static void ns83820_cleanup_tx(struct ns83820 *dev)
1055{
1056 unsigned i;
1057
1058 for (i=0; i<NR_TX_DESC; i++) {
1059 struct sk_buff *skb = dev->tx_skbs[i];
1060 dev->tx_skbs[i] = NULL;
1061 if (skb) {
Al Viroc69fda42006-11-20 14:12:54 -05001062 __le32 *desc = dev->tx_descs + (i * DESC_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 pci_unmap_single(dev->pci_dev,
1064 desc_addr_get(desc + DESC_BUFPTR),
1065 le32_to_cpu(desc[DESC_CMDSTS]) & CMDSTS_LEN_MASK,
1066 PCI_DMA_TODEVICE);
1067 dev_kfree_skb_irq(skb);
1068 atomic_dec(&dev->nr_tx_skbs);
1069 }
1070 }
1071
1072 memset(dev->tx_descs, 0, NR_TX_DESC * DESC_SIZE * 4);
1073}
1074
1075/* transmit routine. This code relies on the network layer serializing
1076 * its calls in, but will run happily in parallel with the interrupt
1077 * handler. This code currently has provisions for fragmenting tx buffers
1078 * while trying to track down a bug in either the zero copy code or
1079 * the tx fifo (hence the MAX_FRAG_LEN).
1080 */
Stephen Hemminger613573252009-08-31 19:50:58 +00001081static netdev_tx_t ns83820_hard_start_xmit(struct sk_buff *skb,
1082 struct net_device *ndev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083{
1084 struct ns83820 *dev = PRIV(ndev);
1085 u32 free_idx, cmdsts, extsts;
1086 int nr_free, nr_frags;
1087 unsigned tx_done_idx, last_idx;
1088 dma_addr_t buf;
1089 unsigned len;
1090 skb_frag_t *frag;
1091 int stopped = 0;
1092 int do_intr = 0;
Al Viroc69fda42006-11-20 14:12:54 -05001093 volatile __le32 *first_desc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094
1095 dprintk("ns83820_hard_start_xmit\n");
1096
1097 nr_frags = skb_shinfo(skb)->nr_frags;
1098again:
1099 if (unlikely(dev->CFG_cache & CFG_LNKSTS)) {
1100 netif_stop_queue(ndev);
1101 if (unlikely(dev->CFG_cache & CFG_LNKSTS))
Patrick McHardy5b548142009-06-12 06:22:29 +00001102 return NETDEV_TX_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 netif_start_queue(ndev);
1104 }
1105
1106 last_idx = free_idx = dev->tx_free_idx;
1107 tx_done_idx = dev->tx_done_idx;
1108 nr_free = (tx_done_idx + NR_TX_DESC-2 - free_idx) % NR_TX_DESC;
1109 nr_free -= 1;
1110 if (nr_free <= nr_frags) {
1111 dprintk("stop_queue - not enough(%p)\n", ndev);
1112 netif_stop_queue(ndev);
1113
1114 /* Check again: we may have raced with a tx done irq */
1115 if (dev->tx_done_idx != tx_done_idx) {
1116 dprintk("restart queue(%p)\n", ndev);
1117 netif_start_queue(ndev);
1118 goto again;
1119 }
Patrick McHardy5b548142009-06-12 06:22:29 +00001120 return NETDEV_TX_BUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 }
1122
1123 if (free_idx == dev->tx_intr_idx) {
1124 do_intr = 1;
1125 dev->tx_intr_idx = (dev->tx_intr_idx + NR_TX_DESC/4) % NR_TX_DESC;
1126 }
1127
1128 nr_free -= nr_frags;
1129 if (nr_free < MIN_TX_DESC_FREE) {
1130 dprintk("stop_queue - last entry(%p)\n", ndev);
1131 netif_stop_queue(ndev);
1132 stopped = 1;
1133 }
1134
1135 frag = skb_shinfo(skb)->frags;
1136 if (!nr_frags)
1137 frag = NULL;
1138 extsts = 0;
Patrick McHardy84fa7932006-08-29 16:44:56 -07001139 if (skb->ip_summed == CHECKSUM_PARTIAL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 extsts |= EXTSTS_IPPKT;
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -07001141 if (IPPROTO_TCP == ip_hdr(skb)->protocol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 extsts |= EXTSTS_TCPPKT;
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -07001143 else if (IPPROTO_UDP == ip_hdr(skb)->protocol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 extsts |= EXTSTS_UDPPKT;
1145 }
1146
1147#ifdef NS83820_VLAN_ACCEL_SUPPORT
1148 if(vlan_tx_tag_present(skb)) {
1149 /* fetch the vlan tag info out of the
Lucas De Marchi25985ed2011-03-30 22:57:33 -03001150 * ancillary data if the vlan code
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 * is using hw vlan acceleration
1152 */
1153 short tag = vlan_tx_tag_get(skb);
1154 extsts |= (EXTSTS_VPKT | htons(tag));
1155 }
1156#endif
1157
1158 len = skb->len;
1159 if (nr_frags)
1160 len -= skb->data_len;
1161 buf = pci_map_single(dev->pci_dev, skb->data, len, PCI_DMA_TODEVICE);
1162
1163 first_desc = dev->tx_descs + (free_idx * DESC_SIZE);
1164
1165 for (;;) {
Al Viroc69fda42006-11-20 14:12:54 -05001166 volatile __le32 *desc = dev->tx_descs + (free_idx * DESC_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167
1168 dprintk("frag[%3u]: %4u @ 0x%08Lx\n", free_idx, len,
1169 (unsigned long long)buf);
1170 last_idx = free_idx;
1171 free_idx = (free_idx + 1) % NR_TX_DESC;
1172 desc[DESC_LINK] = cpu_to_le32(dev->tx_phy_descs + (free_idx * DESC_SIZE * 4));
1173 desc_addr_set(desc + DESC_BUFPTR, buf);
1174 desc[DESC_EXTSTS] = cpu_to_le32(extsts);
1175
Benjamin LaHaisec16ef1c2005-04-06 11:17:59 -04001176 cmdsts = ((nr_frags) ? CMDSTS_MORE : do_intr ? CMDSTS_INTR : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 cmdsts |= (desc == first_desc) ? 0 : CMDSTS_OWN;
1178 cmdsts |= len;
1179 desc[DESC_CMDSTS] = cpu_to_le32(cmdsts);
1180
Linus Torvalds1da177e2005-04-16 15:20:36 -07001181 if (!nr_frags)
1182 break;
1183
1184 buf = pci_map_page(dev->pci_dev, frag->page,
1185 frag->page_offset,
1186 frag->size, PCI_DMA_TODEVICE);
1187 dprintk("frag: buf=%08Lx page=%08lx offset=%08lx\n",
1188 (long long)buf, (long) page_to_pfn(frag->page),
1189 frag->page_offset);
1190 len = frag->size;
1191 frag++;
1192 nr_frags--;
1193 }
1194 dprintk("done pkt\n");
1195
1196 spin_lock_irq(&dev->tx_lock);
1197 dev->tx_skbs[last_idx] = skb;
1198 first_desc[DESC_CMDSTS] |= cpu_to_le32(CMDSTS_OWN);
1199 dev->tx_free_idx = free_idx;
1200 atomic_inc(&dev->nr_tx_skbs);
1201 spin_unlock_irq(&dev->tx_lock);
1202
1203 kick_tx(dev);
1204
1205 /* Check again: we may have raced with a tx done irq */
1206 if (stopped && (dev->tx_done_idx != tx_done_idx) && start_tx_okay(dev))
1207 netif_start_queue(ndev);
1208
Eric Dumazetcdd0db02009-05-28 00:00:41 +00001209 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210}
1211
1212static void ns83820_update_stats(struct ns83820 *dev)
1213{
Kulikov Vasiliye929bc32010-07-05 02:14:28 +00001214 struct net_device *ndev = dev->ndev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 u8 __iomem *base = dev->base;
1216
1217 /* the DP83820 will freeze counters, so we need to read all of them */
Kulikov Vasiliye929bc32010-07-05 02:14:28 +00001218 ndev->stats.rx_errors += readl(base + 0x60) & 0xffff;
1219 ndev->stats.rx_crc_errors += readl(base + 0x64) & 0xffff;
1220 ndev->stats.rx_missed_errors += readl(base + 0x68) & 0xffff;
1221 ndev->stats.rx_frame_errors += readl(base + 0x6c) & 0xffff;
1222 /*ndev->stats.rx_symbol_errors +=*/ readl(base + 0x70);
1223 ndev->stats.rx_length_errors += readl(base + 0x74) & 0xffff;
1224 ndev->stats.rx_length_errors += readl(base + 0x78) & 0xffff;
1225 /*ndev->stats.rx_badopcode_errors += */ readl(base + 0x7c);
1226 /*ndev->stats.rx_pause_count += */ readl(base + 0x80);
1227 /*ndev->stats.tx_pause_count += */ readl(base + 0x84);
1228 ndev->stats.tx_carrier_errors += readl(base + 0x88) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229}
1230
1231static struct net_device_stats *ns83820_get_stats(struct net_device *ndev)
1232{
1233 struct ns83820 *dev = PRIV(ndev);
1234
1235 /* somewhat overkill */
1236 spin_lock_irq(&dev->misc_lock);
1237 ns83820_update_stats(dev);
1238 spin_unlock_irq(&dev->misc_lock);
1239
Kulikov Vasiliye929bc32010-07-05 02:14:28 +00001240 return &ndev->stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241}
1242
Jeff Garzik10096972007-08-14 01:24:56 -04001243/* Let ethtool retrieve info */
1244static int ns83820_get_settings(struct net_device *ndev,
1245 struct ethtool_cmd *cmd)
1246{
1247 struct ns83820 *dev = PRIV(ndev);
1248 u32 cfg, tanar, tbicr;
Jeff Garzik10096972007-08-14 01:24:56 -04001249 int fullduplex = 0;
1250
1251 /*
1252 * Here's the list of available ethtool commands from other drivers:
1253 * cmd->advertising =
1254 * cmd->speed =
1255 * cmd->duplex =
1256 * cmd->port = 0;
1257 * cmd->phy_address =
1258 * cmd->transceiver = 0;
1259 * cmd->autoneg =
1260 * cmd->maxtxpkt = 0;
1261 * cmd->maxrxpkt = 0;
1262 */
1263
1264 /* read current configuration */
1265 cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY;
1266 tanar = readl(dev->base + TANAR);
1267 tbicr = readl(dev->base + TBICR);
1268
Denis Kirjanov7457e912010-09-03 10:05:39 +00001269 fullduplex = (cfg & CFG_DUPSTS) ? 1 : 0;
Jeff Garzik10096972007-08-14 01:24:56 -04001270
1271 cmd->supported = SUPPORTED_Autoneg;
1272
Jeff Garzik10096972007-08-14 01:24:56 -04001273 if (dev->CFG_cache & CFG_TBI_EN) {
Denis Kirjanov3c083ed2010-09-03 10:05:40 +00001274 /* we have optical interface */
Jeff Garzik10096972007-08-14 01:24:56 -04001275 cmd->supported |= SUPPORTED_1000baseT_Half |
1276 SUPPORTED_1000baseT_Full |
1277 SUPPORTED_FIBRE;
1278 cmd->port = PORT_FIBRE;
Denis Kirjanov3c083ed2010-09-03 10:05:40 +00001279 } else {
1280 /* we have copper */
1281 cmd->supported |= SUPPORTED_10baseT_Half |
1282 SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Half |
1283 SUPPORTED_100baseT_Full | SUPPORTED_1000baseT_Half |
1284 SUPPORTED_1000baseT_Full |
1285 SUPPORTED_MII;
1286 cmd->port = PORT_MII;
1287 }
Jeff Garzik10096972007-08-14 01:24:56 -04001288
1289 cmd->duplex = fullduplex ? DUPLEX_FULL : DUPLEX_HALF;
1290 switch (cfg / CFG_SPDSTS0 & 3) {
1291 case 2:
1292 cmd->speed = SPEED_1000;
1293 break;
1294 case 1:
1295 cmd->speed = SPEED_100;
1296 break;
1297 default:
1298 cmd->speed = SPEED_10;
1299 break;
1300 }
Denis Kirjanova5d31e02010-09-03 10:05:41 +00001301 cmd->autoneg = (tbicr & TBICR_MR_AN_ENABLE)
1302 ? AUTONEG_ENABLE : AUTONEG_DISABLE;
Jeff Garzik10096972007-08-14 01:24:56 -04001303 return 0;
1304}
1305
1306/* Let ethool change settings*/
1307static int ns83820_set_settings(struct net_device *ndev,
1308 struct ethtool_cmd *cmd)
1309{
1310 struct ns83820 *dev = PRIV(ndev);
1311 u32 cfg, tanar;
1312 int have_optical = 0;
1313 int fullduplex = 0;
1314
1315 /* read current configuration */
1316 cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY;
1317 tanar = readl(dev->base + TANAR);
1318
1319 if (dev->CFG_cache & CFG_TBI_EN) {
1320 /* we have optical */
1321 have_optical = 1;
1322 fullduplex = (tanar & TANAR_FULL_DUP);
1323
1324 } else {
1325 /* we have copper */
1326 fullduplex = cfg & CFG_DUPSTS;
1327 }
1328
1329 spin_lock_irq(&dev->misc_lock);
1330 spin_lock(&dev->tx_lock);
1331
1332 /* Set duplex */
1333 if (cmd->duplex != fullduplex) {
1334 if (have_optical) {
1335 /*set full duplex*/
1336 if (cmd->duplex == DUPLEX_FULL) {
1337 /* force full duplex */
1338 writel(readl(dev->base + TXCFG)
1339 | TXCFG_CSI | TXCFG_HBI | TXCFG_ATP,
1340 dev->base + TXCFG);
1341 writel(readl(dev->base + RXCFG) | RXCFG_RX_FD,
1342 dev->base + RXCFG);
1343 /* Light up full duplex LED */
1344 writel(readl(dev->base + GPIOR) | GPIOR_GP1_OUT,
1345 dev->base + GPIOR);
1346 } else {
1347 /*TODO: set half duplex */
1348 }
1349
1350 } else {
1351 /*we have copper*/
1352 /* TODO: Set duplex for copper cards */
1353 }
1354 printk(KERN_INFO "%s: Duplex set via ethtool\n",
1355 ndev->name);
1356 }
1357
1358 /* Set autonegotiation */
1359 if (1) {
1360 if (cmd->autoneg == AUTONEG_ENABLE) {
1361 /* restart auto negotiation */
1362 writel(TBICR_MR_AN_ENABLE | TBICR_MR_RESTART_AN,
1363 dev->base + TBICR);
1364 writel(TBICR_MR_AN_ENABLE, dev->base + TBICR);
1365 dev->linkstate = LINK_AUTONEGOTIATE;
1366
1367 printk(KERN_INFO "%s: autoneg enabled via ethtool\n",
1368 ndev->name);
1369 } else {
1370 /* disable auto negotiation */
1371 writel(0x00000000, dev->base + TBICR);
1372 }
1373
1374 printk(KERN_INFO "%s: autoneg %s via ethtool\n", ndev->name,
1375 cmd->autoneg ? "ENABLED" : "DISABLED");
1376 }
1377
1378 phy_intr(ndev);
1379 spin_unlock(&dev->tx_lock);
1380 spin_unlock_irq(&dev->misc_lock);
1381
1382 return 0;
1383}
1384/* end ethtool get/set support -df */
1385
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386static void ns83820_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info)
1387{
1388 struct ns83820 *dev = PRIV(ndev);
1389 strcpy(info->driver, "ns83820");
1390 strcpy(info->version, VERSION);
1391 strcpy(info->bus_info, pci_name(dev->pci_dev));
1392}
1393
1394static u32 ns83820_get_link(struct net_device *ndev)
1395{
1396 struct ns83820 *dev = PRIV(ndev);
1397 u32 cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY;
1398 return cfg & CFG_LNKSTS ? 1 : 0;
1399}
1400
Jeff Garzik7282d492006-09-13 14:30:00 -04001401static const struct ethtool_ops ops = {
Jeff Garzik10096972007-08-14 01:24:56 -04001402 .get_settings = ns83820_get_settings,
1403 .set_settings = ns83820_set_settings,
1404 .get_drvinfo = ns83820_get_drvinfo,
1405 .get_link = ns83820_get_link
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406};
1407
Denis Kirjanov1a9f28c2010-08-30 21:19:15 +00001408static inline void ns83820_disable_interrupts(struct ns83820 *dev)
1409{
1410 writel(0, dev->base + IMR);
1411 writel(0, dev->base + IER);
1412 readl(dev->base + IER);
1413}
1414
Ingo Molnar3a10cce2006-06-30 02:25:06 -07001415/* this function is called in irq context from the ISR */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416static void ns83820_mib_isr(struct ns83820 *dev)
1417{
Ingo Molnar3a10cce2006-06-30 02:25:06 -07001418 unsigned long flags;
1419 spin_lock_irqsave(&dev->misc_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420 ns83820_update_stats(dev);
Ingo Molnar3a10cce2006-06-30 02:25:06 -07001421 spin_unlock_irqrestore(&dev->misc_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422}
1423
1424static void ns83820_do_isr(struct net_device *ndev, u32 isr);
David Howells7d12e782006-10-05 14:55:46 +01001425static irqreturn_t ns83820_irq(int foo, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426{
1427 struct net_device *ndev = data;
1428 struct ns83820 *dev = PRIV(ndev);
1429 u32 isr;
1430 dprintk("ns83820_irq(%p)\n", ndev);
1431
1432 dev->ihr = 0;
1433
1434 isr = readl(dev->base + ISR);
1435 dprintk("irq: %08x\n", isr);
1436 ns83820_do_isr(ndev, isr);
1437 return IRQ_HANDLED;
1438}
1439
1440static void ns83820_do_isr(struct net_device *ndev, u32 isr)
1441{
1442 struct ns83820 *dev = PRIV(ndev);
Ingo Molnar3a10cce2006-06-30 02:25:06 -07001443 unsigned long flags;
1444
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445#ifdef DEBUG
1446 if (isr & ~(ISR_PHY | ISR_RXDESC | ISR_RXEARLY | ISR_RXOK | ISR_RXERR | ISR_TXIDLE | ISR_TXOK | ISR_TXDESC))
1447 Dprintk("odd isr? 0x%08x\n", isr);
1448#endif
1449
1450 if (ISR_RXIDLE & isr) {
1451 dev->rx_info.idle = 1;
1452 Dprintk("oh dear, we are idle\n");
1453 ns83820_rx_kick(ndev);
1454 }
1455
1456 if ((ISR_RXDESC | ISR_RXOK) & isr) {
1457 prefetch(dev->rx_info.next_rx_desc);
1458
Ingo Molnar3a10cce2006-06-30 02:25:06 -07001459 spin_lock_irqsave(&dev->misc_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460 dev->IMR_cache &= ~(ISR_RXDESC | ISR_RXOK);
1461 writel(dev->IMR_cache, dev->base + IMR);
Ingo Molnar3a10cce2006-06-30 02:25:06 -07001462 spin_unlock_irqrestore(&dev->misc_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463
1464 tasklet_schedule(&dev->rx_tasklet);
1465 //rx_irq(ndev);
1466 //writel(4, dev->base + IHR);
1467 }
1468
1469 if ((ISR_RXIDLE | ISR_RXORN | ISR_RXDESC | ISR_RXOK | ISR_RXERR) & isr)
1470 ns83820_rx_kick(ndev);
1471
1472 if (unlikely(ISR_RXSOVR & isr)) {
1473 //printk("overrun: rxsovr\n");
Kulikov Vasiliye929bc32010-07-05 02:14:28 +00001474 ndev->stats.rx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001475 }
1476
1477 if (unlikely(ISR_RXORN & isr)) {
1478 //printk("overrun: rxorn\n");
Kulikov Vasiliye929bc32010-07-05 02:14:28 +00001479 ndev->stats.rx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 }
1481
1482 if ((ISR_RXRCMP & isr) && dev->rx_info.up)
1483 writel(CR_RXE, dev->base + CR);
1484
1485 if (ISR_TXIDLE & isr) {
1486 u32 txdp;
1487 txdp = readl(dev->base + TXDP);
1488 dprintk("txdp: %08x\n", txdp);
1489 txdp -= dev->tx_phy_descs;
1490 dev->tx_idx = txdp / (DESC_SIZE * 4);
1491 if (dev->tx_idx >= NR_TX_DESC) {
1492 printk(KERN_ALERT "%s: BUG -- txdp out of range\n", ndev->name);
1493 dev->tx_idx = 0;
1494 }
1495 /* The may have been a race between a pci originated read
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001496 * and the descriptor update from the cpu. Just in case,
1497 * kick the transmitter if the hardware thinks it is on a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498 * different descriptor than we are.
1499 */
1500 if (dev->tx_idx != dev->tx_free_idx)
1501 kick_tx(dev);
1502 }
1503
1504 /* Defer tx ring processing until more than a minimum amount of
1505 * work has accumulated
1506 */
1507 if ((ISR_TXDESC | ISR_TXIDLE | ISR_TXOK | ISR_TXERR) & isr) {
Ingo Molnar3a10cce2006-06-30 02:25:06 -07001508 spin_lock_irqsave(&dev->tx_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509 do_tx_done(ndev);
Ingo Molnar3a10cce2006-06-30 02:25:06 -07001510 spin_unlock_irqrestore(&dev->tx_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001511
1512 /* Disable TxOk if there are no outstanding tx packets.
1513 */
1514 if ((dev->tx_done_idx == dev->tx_free_idx) &&
1515 (dev->IMR_cache & ISR_TXOK)) {
Ingo Molnar3a10cce2006-06-30 02:25:06 -07001516 spin_lock_irqsave(&dev->misc_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517 dev->IMR_cache &= ~ISR_TXOK;
1518 writel(dev->IMR_cache, dev->base + IMR);
Ingo Molnar3a10cce2006-06-30 02:25:06 -07001519 spin_unlock_irqrestore(&dev->misc_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520 }
1521 }
1522
1523 /* The TxIdle interrupt can come in before the transmit has
1524 * completed. Normally we reap packets off of the combination
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001525 * of TxDesc and TxIdle and leave TxOk disabled (since it
1526 * occurs on every packet), but when no further irqs of this
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 * nature are expected, we must enable TxOk.
1528 */
1529 if ((ISR_TXIDLE & isr) && (dev->tx_done_idx != dev->tx_free_idx)) {
Ingo Molnar3a10cce2006-06-30 02:25:06 -07001530 spin_lock_irqsave(&dev->misc_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531 dev->IMR_cache |= ISR_TXOK;
1532 writel(dev->IMR_cache, dev->base + IMR);
Ingo Molnar3a10cce2006-06-30 02:25:06 -07001533 spin_unlock_irqrestore(&dev->misc_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534 }
1535
1536 /* MIB interrupt: one of the statistics counters is about to overflow */
1537 if (unlikely(ISR_MIB & isr))
1538 ns83820_mib_isr(dev);
1539
1540 /* PHY: Link up/down/negotiation state change */
1541 if (unlikely(ISR_PHY & isr))
1542 phy_intr(ndev);
1543
1544#if 0 /* Still working on the interrupt mitigation strategy */
1545 if (dev->ihr)
1546 writel(dev->ihr, dev->base + IHR);
1547#endif
1548}
1549
1550static void ns83820_do_reset(struct ns83820 *dev, u32 which)
1551{
1552 Dprintk("resetting chip...\n");
1553 writel(which, dev->base + CR);
1554 do {
1555 schedule();
1556 } while (readl(dev->base + CR) & which);
1557 Dprintk("okay!\n");
1558}
1559
1560static int ns83820_stop(struct net_device *ndev)
1561{
1562 struct ns83820 *dev = PRIV(ndev);
1563
1564 /* FIXME: protect against interrupt handler? */
1565 del_timer_sync(&dev->tx_watchdog);
1566
Denis Kirjanov1a9f28c2010-08-30 21:19:15 +00001567 ns83820_disable_interrupts(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568
1569 dev->rx_info.up = 0;
1570 synchronize_irq(dev->pci_dev->irq);
1571
1572 ns83820_do_reset(dev, CR_RST);
1573
1574 synchronize_irq(dev->pci_dev->irq);
1575
1576 spin_lock_irq(&dev->misc_lock);
1577 dev->IMR_cache &= ~(ISR_TXURN | ISR_TXIDLE | ISR_TXERR | ISR_TXDESC | ISR_TXOK);
1578 spin_unlock_irq(&dev->misc_lock);
1579
1580 ns83820_cleanup_rx(dev);
1581 ns83820_cleanup_tx(dev);
1582
1583 return 0;
1584}
1585
1586static void ns83820_tx_timeout(struct net_device *ndev)
1587{
1588 struct ns83820 *dev = PRIV(ndev);
Al Viroc69fda42006-11-20 14:12:54 -05001589 u32 tx_done_idx;
1590 __le32 *desc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001591 unsigned long flags;
1592
Ingo Molnar3a10cce2006-06-30 02:25:06 -07001593 spin_lock_irqsave(&dev->tx_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594
1595 tx_done_idx = dev->tx_done_idx;
1596 desc = dev->tx_descs + (tx_done_idx * DESC_SIZE);
1597
1598 printk(KERN_INFO "%s: tx_timeout: tx_done_idx=%d free_idx=%d cmdsts=%08x\n",
1599 ndev->name,
1600 tx_done_idx, dev->tx_free_idx, le32_to_cpu(desc[DESC_CMDSTS]));
1601
1602#if defined(DEBUG)
1603 {
1604 u32 isr;
1605 isr = readl(dev->base + ISR);
1606 printk("irq: %08x imr: %08x\n", isr, dev->IMR_cache);
1607 ns83820_do_isr(ndev, isr);
1608 }
1609#endif
1610
1611 do_tx_done(ndev);
1612
1613 tx_done_idx = dev->tx_done_idx;
1614 desc = dev->tx_descs + (tx_done_idx * DESC_SIZE);
1615
1616 printk(KERN_INFO "%s: after: tx_done_idx=%d free_idx=%d cmdsts=%08x\n",
1617 ndev->name,
1618 tx_done_idx, dev->tx_free_idx, le32_to_cpu(desc[DESC_CMDSTS]));
1619
Ingo Molnar3a10cce2006-06-30 02:25:06 -07001620 spin_unlock_irqrestore(&dev->tx_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621}
1622
1623static void ns83820_tx_watch(unsigned long data)
1624{
1625 struct net_device *ndev = (void *)data;
1626 struct ns83820 *dev = PRIV(ndev);
1627
1628#if defined(DEBUG)
1629 printk("ns83820_tx_watch: %u %u %d\n",
1630 dev->tx_done_idx, dev->tx_free_idx, atomic_read(&dev->nr_tx_skbs)
1631 );
1632#endif
1633
Eric Dumazetcdd0db02009-05-28 00:00:41 +00001634 if (time_after(jiffies, dev_trans_start(ndev) + 1*HZ) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -07001635 dev->tx_done_idx != dev->tx_free_idx) {
1636 printk(KERN_DEBUG "%s: ns83820_tx_watch: %u %u %d\n",
1637 ndev->name,
1638 dev->tx_done_idx, dev->tx_free_idx,
1639 atomic_read(&dev->nr_tx_skbs));
1640 ns83820_tx_timeout(ndev);
1641 }
1642
1643 mod_timer(&dev->tx_watchdog, jiffies + 2*HZ);
1644}
1645
1646static int ns83820_open(struct net_device *ndev)
1647{
1648 struct ns83820 *dev = PRIV(ndev);
1649 unsigned i;
1650 u32 desc;
1651 int ret;
1652
1653 dprintk("ns83820_open\n");
1654
1655 writel(0, dev->base + PQCR);
1656
1657 ret = ns83820_setup_rx(ndev);
1658 if (ret)
1659 goto failed;
1660
1661 memset(dev->tx_descs, 0, 4 * NR_TX_DESC * DESC_SIZE);
1662 for (i=0; i<NR_TX_DESC; i++) {
1663 dev->tx_descs[(i * DESC_SIZE) + DESC_LINK]
1664 = cpu_to_le32(
1665 dev->tx_phy_descs
1666 + ((i+1) % NR_TX_DESC) * DESC_SIZE * 4);
1667 }
1668
1669 dev->tx_idx = 0;
1670 dev->tx_done_idx = 0;
1671 desc = dev->tx_phy_descs;
1672 writel(0, dev->base + TXDP_HI);
1673 writel(desc, dev->base + TXDP);
1674
1675 init_timer(&dev->tx_watchdog);
1676 dev->tx_watchdog.data = (unsigned long)ndev;
1677 dev->tx_watchdog.function = ns83820_tx_watch;
1678 mod_timer(&dev->tx_watchdog, jiffies + 2*HZ);
1679
1680 netif_start_queue(ndev); /* FIXME: wait for phy to come up */
1681
1682 return 0;
1683
1684failed:
1685 ns83820_stop(ndev);
1686 return ret;
1687}
1688
1689static void ns83820_getmac(struct ns83820 *dev, u8 *mac)
1690{
1691 unsigned i;
1692 for (i=0; i<3; i++) {
1693 u32 data;
Adrian Bunk48888cc2005-11-05 20:01:47 +01001694
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695 /* Read from the perfect match memory: this is loaded by
1696 * the chip from the EEPROM via the EELOAD self test.
1697 */
1698 writel(i*2, dev->base + RFCR);
1699 data = readl(dev->base + RFDR);
Adrian Bunk48888cc2005-11-05 20:01:47 +01001700
Linus Torvalds1da177e2005-04-16 15:20:36 -07001701 *mac++ = data;
1702 *mac++ = data >> 8;
1703 }
1704}
1705
1706static int ns83820_change_mtu(struct net_device *ndev, int new_mtu)
1707{
1708 if (new_mtu > RX_BUF_SIZE)
1709 return -EINVAL;
1710 ndev->mtu = new_mtu;
1711 return 0;
1712}
1713
1714static void ns83820_set_multicast(struct net_device *ndev)
1715{
1716 struct ns83820 *dev = PRIV(ndev);
1717 u8 __iomem *rfcr = dev->base + RFCR;
1718 u32 and_mask = 0xffffffff;
1719 u32 or_mask = 0;
1720 u32 val;
1721
1722 if (ndev->flags & IFF_PROMISC)
1723 or_mask |= RFCR_AAU | RFCR_AAM;
1724 else
1725 and_mask &= ~(RFCR_AAU | RFCR_AAM);
1726
Jiri Pirko4cd24ea2010-02-08 04:30:35 +00001727 if (ndev->flags & IFF_ALLMULTI || netdev_mc_count(ndev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728 or_mask |= RFCR_AAM;
1729 else
1730 and_mask &= ~RFCR_AAM;
1731
1732 spin_lock_irq(&dev->misc_lock);
1733 val = (readl(rfcr) & and_mask) | or_mask;
1734 /* Ramit : RFCR Write Fix doc says RFEN must be 0 modify other bits */
1735 writel(val & ~RFCR_RFEN, rfcr);
1736 writel(val, rfcr);
1737 spin_unlock_irq(&dev->misc_lock);
1738}
1739
1740static void ns83820_run_bist(struct net_device *ndev, const char *name, u32 enable, u32 done, u32 fail)
1741{
1742 struct ns83820 *dev = PRIV(ndev);
1743 int timed_out = 0;
Marcelo Feitoza Parisiff5688a2006-01-09 18:37:15 -08001744 unsigned long start;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001745 u32 status;
1746 int loops = 0;
1747
1748 dprintk("%s: start %s\n", ndev->name, name);
1749
1750 start = jiffies;
1751
1752 writel(enable, dev->base + PTSCR);
1753 for (;;) {
1754 loops++;
1755 status = readl(dev->base + PTSCR);
1756 if (!(status & enable))
1757 break;
1758 if (status & done)
1759 break;
1760 if (status & fail)
1761 break;
Marcelo Feitoza Parisiff5688a2006-01-09 18:37:15 -08001762 if (time_after_eq(jiffies, start + HZ)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001763 timed_out = 1;
1764 break;
1765 }
Nishanth Aravamudan3173c892005-09-11 02:09:55 -07001766 schedule_timeout_uninterruptible(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 }
1768
1769 if (status & fail)
1770 printk(KERN_INFO "%s: %s failed! (0x%08x & 0x%08x)\n",
1771 ndev->name, name, status, fail);
1772 else if (timed_out)
1773 printk(KERN_INFO "%s: run_bist %s timed out! (%08x)\n",
1774 ndev->name, name, status);
1775
1776 dprintk("%s: done %s in %d loops\n", ndev->name, name, loops);
1777}
1778
1779#ifdef PHY_CODE_IS_FINISHED
1780static void ns83820_mii_write_bit(struct ns83820 *dev, int bit)
1781{
1782 /* drive MDC low */
1783 dev->MEAR_cache &= ~MEAR_MDC;
1784 writel(dev->MEAR_cache, dev->base + MEAR);
1785 readl(dev->base + MEAR);
1786
1787 /* enable output, set bit */
1788 dev->MEAR_cache |= MEAR_MDDIR;
1789 if (bit)
1790 dev->MEAR_cache |= MEAR_MDIO;
1791 else
1792 dev->MEAR_cache &= ~MEAR_MDIO;
1793
1794 /* set the output bit */
1795 writel(dev->MEAR_cache, dev->base + MEAR);
1796 readl(dev->base + MEAR);
1797
1798 /* Wait. Max clock rate is 2.5MHz, this way we come in under 1MHz */
1799 udelay(1);
1800
1801 /* drive MDC high causing the data bit to be latched */
1802 dev->MEAR_cache |= MEAR_MDC;
1803 writel(dev->MEAR_cache, dev->base + MEAR);
1804 readl(dev->base + MEAR);
1805
1806 /* Wait again... */
1807 udelay(1);
1808}
1809
1810static int ns83820_mii_read_bit(struct ns83820 *dev)
1811{
1812 int bit;
1813
1814 /* drive MDC low, disable output */
1815 dev->MEAR_cache &= ~MEAR_MDC;
1816 dev->MEAR_cache &= ~MEAR_MDDIR;
1817 writel(dev->MEAR_cache, dev->base + MEAR);
1818 readl(dev->base + MEAR);
1819
1820 /* Wait. Max clock rate is 2.5MHz, this way we come in under 1MHz */
1821 udelay(1);
1822
1823 /* drive MDC high causing the data bit to be latched */
1824 bit = (readl(dev->base + MEAR) & MEAR_MDIO) ? 1 : 0;
1825 dev->MEAR_cache |= MEAR_MDC;
1826 writel(dev->MEAR_cache, dev->base + MEAR);
1827
1828 /* Wait again... */
1829 udelay(1);
1830
1831 return bit;
1832}
1833
1834static unsigned ns83820_mii_read_reg(struct ns83820 *dev, unsigned phy, unsigned reg)
1835{
1836 unsigned data = 0;
1837 int i;
1838
1839 /* read some garbage so that we eventually sync up */
1840 for (i=0; i<64; i++)
1841 ns83820_mii_read_bit(dev);
1842
1843 ns83820_mii_write_bit(dev, 0); /* start */
1844 ns83820_mii_write_bit(dev, 1);
1845 ns83820_mii_write_bit(dev, 1); /* opcode read */
1846 ns83820_mii_write_bit(dev, 0);
1847
1848 /* write out the phy address: 5 bits, msb first */
1849 for (i=0; i<5; i++)
1850 ns83820_mii_write_bit(dev, phy & (0x10 >> i));
1851
1852 /* write out the register address, 5 bits, msb first */
1853 for (i=0; i<5; i++)
1854 ns83820_mii_write_bit(dev, reg & (0x10 >> i));
1855
1856 ns83820_mii_read_bit(dev); /* turn around cycles */
1857 ns83820_mii_read_bit(dev);
1858
1859 /* read in the register data, 16 bits msb first */
1860 for (i=0; i<16; i++) {
1861 data <<= 1;
1862 data |= ns83820_mii_read_bit(dev);
1863 }
1864
1865 return data;
1866}
1867
1868static unsigned ns83820_mii_write_reg(struct ns83820 *dev, unsigned phy, unsigned reg, unsigned data)
1869{
1870 int i;
1871
1872 /* read some garbage so that we eventually sync up */
1873 for (i=0; i<64; i++)
1874 ns83820_mii_read_bit(dev);
1875
1876 ns83820_mii_write_bit(dev, 0); /* start */
1877 ns83820_mii_write_bit(dev, 1);
1878 ns83820_mii_write_bit(dev, 0); /* opcode read */
1879 ns83820_mii_write_bit(dev, 1);
1880
1881 /* write out the phy address: 5 bits, msb first */
1882 for (i=0; i<5; i++)
1883 ns83820_mii_write_bit(dev, phy & (0x10 >> i));
1884
1885 /* write out the register address, 5 bits, msb first */
1886 for (i=0; i<5; i++)
1887 ns83820_mii_write_bit(dev, reg & (0x10 >> i));
1888
1889 ns83820_mii_read_bit(dev); /* turn around cycles */
1890 ns83820_mii_read_bit(dev);
1891
1892 /* read in the register data, 16 bits msb first */
1893 for (i=0; i<16; i++)
1894 ns83820_mii_write_bit(dev, (data >> (15 - i)) & 1);
1895
1896 return data;
1897}
1898
1899static void ns83820_probe_phy(struct net_device *ndev)
1900{
1901 struct ns83820 *dev = PRIV(ndev);
1902 static int first;
1903 int i;
1904#define MII_PHYIDR1 0x02
1905#define MII_PHYIDR2 0x03
1906
1907#if 0
1908 if (!first) {
1909 unsigned tmp;
1910 ns83820_mii_read_reg(dev, 1, 0x09);
1911 ns83820_mii_write_reg(dev, 1, 0x10, 0x0d3e);
1912
1913 tmp = ns83820_mii_read_reg(dev, 1, 0x00);
1914 ns83820_mii_write_reg(dev, 1, 0x00, tmp | 0x8000);
1915 udelay(1300);
1916 ns83820_mii_read_reg(dev, 1, 0x09);
1917 }
1918#endif
1919 first = 1;
1920
1921 for (i=1; i<2; i++) {
1922 int j;
1923 unsigned a, b;
1924 a = ns83820_mii_read_reg(dev, i, MII_PHYIDR1);
1925 b = ns83820_mii_read_reg(dev, i, MII_PHYIDR2);
1926
1927 //printk("%s: phy %d: 0x%04x 0x%04x\n",
1928 // ndev->name, i, a, b);
1929
1930 for (j=0; j<0x16; j+=4) {
1931 dprintk("%s: [0x%02x] %04x %04x %04x %04x\n",
1932 ndev->name, j,
1933 ns83820_mii_read_reg(dev, i, 0 + j),
1934 ns83820_mii_read_reg(dev, i, 1 + j),
1935 ns83820_mii_read_reg(dev, i, 2 + j),
1936 ns83820_mii_read_reg(dev, i, 3 + j)
1937 );
1938 }
1939 }
1940 {
1941 unsigned a, b;
1942 /* read firmware version: memory addr is 0x8402 and 0x8403 */
1943 ns83820_mii_write_reg(dev, 1, 0x16, 0x000d);
1944 ns83820_mii_write_reg(dev, 1, 0x1e, 0x810e);
1945 a = ns83820_mii_read_reg(dev, 1, 0x1d);
1946
1947 ns83820_mii_write_reg(dev, 1, 0x16, 0x000d);
1948 ns83820_mii_write_reg(dev, 1, 0x1e, 0x810e);
1949 b = ns83820_mii_read_reg(dev, 1, 0x1d);
1950 dprintk("version: 0x%04x 0x%04x\n", a, b);
1951 }
1952}
1953#endif
1954
Stephen Hemminger6557d7b2008-11-21 17:35:40 -08001955static const struct net_device_ops netdev_ops = {
1956 .ndo_open = ns83820_open,
1957 .ndo_stop = ns83820_stop,
1958 .ndo_start_xmit = ns83820_hard_start_xmit,
1959 .ndo_get_stats = ns83820_get_stats,
1960 .ndo_change_mtu = ns83820_change_mtu,
1961 .ndo_set_multicast_list = ns83820_set_multicast,
1962 .ndo_validate_addr = eth_validate_addr,
Stephen Hemmingerfe96aaa2009-01-09 11:13:14 +00001963 .ndo_set_mac_address = eth_mac_addr,
Stephen Hemminger6557d7b2008-11-21 17:35:40 -08001964 .ndo_tx_timeout = ns83820_tx_timeout,
Stephen Hemmingera7d1de22009-01-07 17:36:07 -08001965#ifdef NS83820_VLAN_ACCEL_SUPPORT
1966 .ndo_vlan_rx_register = ns83820_vlan_rx_register,
1967#endif
Stephen Hemminger6557d7b2008-11-21 17:35:40 -08001968};
1969
1970static int __devinit ns83820_init_one(struct pci_dev *pci_dev,
1971 const struct pci_device_id *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001972{
1973 struct net_device *ndev;
1974 struct ns83820 *dev;
1975 long addr;
1976 int err;
1977 int using_dac = 0;
1978
1979 /* See if we can set the dma mask early on; failure is fatal. */
Matthias Gehre910638a2006-03-28 01:56:48 -08001980 if (sizeof(dma_addr_t) == 8 &&
Yang Hongyang6a355282009-04-06 19:01:13 -07001981 !pci_set_dma_mask(pci_dev, DMA_BIT_MASK(64))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001982 using_dac = 1;
Yang Hongyang284901a2009-04-06 19:01:15 -07001983 } else if (!pci_set_dma_mask(pci_dev, DMA_BIT_MASK(32))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001984 using_dac = 0;
1985 } else {
Jeff Garzik9b91cf92006-06-27 11:39:50 -04001986 dev_warn(&pci_dev->dev, "pci_set_dma_mask failed!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001987 return -ENODEV;
1988 }
1989
1990 ndev = alloc_etherdev(sizeof(struct ns83820));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001991 err = -ENOMEM;
Jesper Juhl1956cc52011-01-17 10:24:57 +00001992 if (!ndev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993 goto out;
1994
Jesper Juhl1956cc52011-01-17 10:24:57 +00001995 dev = PRIV(ndev);
Adrian Bunkd14e37e2007-07-01 22:21:10 +02001996 dev->ndev = ndev;
1997
Linus Torvalds1da177e2005-04-16 15:20:36 -07001998 spin_lock_init(&dev->rx_info.lock);
1999 spin_lock_init(&dev->tx_lock);
2000 spin_lock_init(&dev->misc_lock);
2001 dev->pci_dev = pci_dev;
2002
Linus Torvalds1da177e2005-04-16 15:20:36 -07002003 SET_NETDEV_DEV(ndev, &pci_dev->dev);
2004
David Howellsc4028952006-11-22 14:57:56 +00002005 INIT_WORK(&dev->tq_refill, queue_refill);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002006 tasklet_init(&dev->rx_tasklet, rx_action, (unsigned long)ndev);
2007
2008 err = pci_enable_device(pci_dev);
2009 if (err) {
Jeff Garzik9b91cf92006-06-27 11:39:50 -04002010 dev_info(&pci_dev->dev, "pci_enable_dev failed: %d\n", err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011 goto out_free;
2012 }
2013
2014 pci_set_master(pci_dev);
2015 addr = pci_resource_start(pci_dev, 1);
2016 dev->base = ioremap_nocache(addr, PAGE_SIZE);
2017 dev->tx_descs = pci_alloc_consistent(pci_dev,
2018 4 * DESC_SIZE * NR_TX_DESC, &dev->tx_phy_descs);
2019 dev->rx_info.descs = pci_alloc_consistent(pci_dev,
2020 4 * DESC_SIZE * NR_RX_DESC, &dev->rx_info.phy_descs);
2021 err = -ENOMEM;
2022 if (!dev->base || !dev->tx_descs || !dev->rx_info.descs)
2023 goto out_disable;
2024
2025 dprintk("%p: %08lx %p: %08lx\n",
2026 dev->tx_descs, (long)dev->tx_phy_descs,
2027 dev->rx_info.descs, (long)dev->rx_info.phy_descs);
2028
Denis Kirjanov1a9f28c2010-08-30 21:19:15 +00002029 ns83820_disable_interrupts(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002030
2031 dev->IMR_cache = 0;
2032
Thomas Gleixner1fb9df52006-07-01 19:29:39 -07002033 err = request_irq(pci_dev->irq, ns83820_irq, IRQF_SHARED,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002034 DRV_NAME, ndev);
2035 if (err) {
Jeff Garzik9b91cf92006-06-27 11:39:50 -04002036 dev_info(&pci_dev->dev, "unable to register irq %d, err %d\n",
Jeff Garzik2e8a5382006-06-27 10:47:51 -04002037 pci_dev->irq, err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002038 goto out_disable;
2039 }
2040
2041 /*
2042 * FIXME: we are holding rtnl_lock() over obscenely long area only
2043 * because some of the setup code uses dev->name. It's Wrong(tm) -
2044 * we should be using driver-specific names for all that stuff.
2045 * For now that will do, but we really need to come back and kill
2046 * most of the dev_alloc_name() users later.
2047 */
2048 rtnl_lock();
2049 err = dev_alloc_name(ndev, ndev->name);
2050 if (err < 0) {
Jeff Garzik9b91cf92006-06-27 11:39:50 -04002051 dev_info(&pci_dev->dev, "unable to get netdev name: %d\n", err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052 goto out_free_irq;
2053 }
2054
2055 printk("%s: ns83820.c: 0x22c: %08x, subsystem: %04x:%04x\n",
2056 ndev->name, le32_to_cpu(readl(dev->base + 0x22c)),
2057 pci_dev->subsystem_vendor, pci_dev->subsystem_device);
2058
Stephen Hemminger6557d7b2008-11-21 17:35:40 -08002059 ndev->netdev_ops = &netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002060 SET_ETHTOOL_OPS(ndev, &ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002061 ndev->watchdog_timeo = 5 * HZ;
2062 pci_set_drvdata(pci_dev, ndev);
2063
2064 ns83820_do_reset(dev, CR_RST);
2065
2066 /* Must reset the ram bist before running it */
2067 writel(PTSCR_RBIST_RST, dev->base + PTSCR);
2068 ns83820_run_bist(ndev, "sram bist", PTSCR_RBIST_EN,
2069 PTSCR_RBIST_DONE, PTSCR_RBIST_FAIL);
2070 ns83820_run_bist(ndev, "eeprom bist", PTSCR_EEBIST_EN, 0,
2071 PTSCR_EEBIST_FAIL);
2072 ns83820_run_bist(ndev, "eeprom load", PTSCR_EELOAD_EN, 0, 0);
2073
2074 /* I love config registers */
2075 dev->CFG_cache = readl(dev->base + CFG);
2076
2077 if ((dev->CFG_cache & CFG_PCI64_DET)) {
2078 printk(KERN_INFO "%s: detected 64 bit PCI data bus.\n",
2079 ndev->name);
2080 /*dev->CFG_cache |= CFG_DATA64_EN;*/
2081 if (!(dev->CFG_cache & CFG_DATA64_EN))
2082 printk(KERN_INFO "%s: EEPROM did not enable 64 bit bus. Disabled.\n",
2083 ndev->name);
2084 } else
2085 dev->CFG_cache &= ~(CFG_DATA64_EN);
2086
2087 dev->CFG_cache &= (CFG_TBI_EN | CFG_MRM_DIS | CFG_MWI_DIS |
2088 CFG_T64ADDR | CFG_DATA64_EN | CFG_EXT_125 |
2089 CFG_M64ADDR);
2090 dev->CFG_cache |= CFG_PINT_DUPSTS | CFG_PINT_LNKSTS | CFG_PINT_SPDSTS |
2091 CFG_EXTSTS_EN | CFG_EXD | CFG_PESEL;
2092 dev->CFG_cache |= CFG_REQALG;
2093 dev->CFG_cache |= CFG_POW;
2094 dev->CFG_cache |= CFG_TMRTEST;
2095
2096 /* When compiled with 64 bit addressing, we must always enable
2097 * the 64 bit descriptor format.
2098 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002099 if (sizeof(dma_addr_t) == 8)
Benjamin LaHaisec16ef1c2005-04-06 11:17:59 -04002100 dev->CFG_cache |= CFG_M64ADDR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101 if (using_dac)
2102 dev->CFG_cache |= CFG_T64ADDR;
2103
2104 /* Big endian mode does not seem to do what the docs suggest */
2105 dev->CFG_cache &= ~CFG_BEM;
2106
2107 /* setup optical transceiver if we have one */
2108 if (dev->CFG_cache & CFG_TBI_EN) {
2109 printk(KERN_INFO "%s: enabling optical transceiver\n",
2110 ndev->name);
2111 writel(readl(dev->base + GPIOR) | 0x3e8, dev->base + GPIOR);
2112
2113 /* setup auto negotiation feature advertisement */
2114 writel(readl(dev->base + TANAR)
2115 | TANAR_HALF_DUP | TANAR_FULL_DUP,
2116 dev->base + TANAR);
2117
2118 /* start auto negotiation */
2119 writel(TBICR_MR_AN_ENABLE | TBICR_MR_RESTART_AN,
2120 dev->base + TBICR);
2121 writel(TBICR_MR_AN_ENABLE, dev->base + TBICR);
2122 dev->linkstate = LINK_AUTONEGOTIATE;
2123
2124 dev->CFG_cache |= CFG_MODE_1000;
2125 }
2126
2127 writel(dev->CFG_cache, dev->base + CFG);
2128 dprintk("CFG: %08x\n", dev->CFG_cache);
2129
2130 if (reset_phy) {
2131 printk(KERN_INFO "%s: resetting phy\n", ndev->name);
2132 writel(dev->CFG_cache | CFG_PHY_RST, dev->base + CFG);
2133 msleep(10);
2134 writel(dev->CFG_cache, dev->base + CFG);
2135 }
2136
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002137#if 0 /* Huh? This sets the PCI latency register. Should be done via
Linus Torvalds1da177e2005-04-16 15:20:36 -07002138 * the PCI layer. FIXME.
2139 */
2140 if (readl(dev->base + SRR))
2141 writel(readl(dev->base+0x20c) | 0xfe00, dev->base + 0x20c);
2142#endif
2143
2144 /* Note! The DMA burst size interacts with packet
2145 * transmission, such that the largest packet that
2146 * can be transmitted is 8192 - FLTH - burst size.
2147 * If only the transmit fifo was larger...
2148 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002149 /* Ramit : 1024 DMA is not a good idea, it ends up banging
Linus Torvalds1da177e2005-04-16 15:20:36 -07002150 * some DELL and COMPAQ SMP systems */
2151 writel(TXCFG_CSI | TXCFG_HBI | TXCFG_ATP | TXCFG_MXDMA512
2152 | ((1600 / 32) * 0x100),
2153 dev->base + TXCFG);
2154
2155 /* Flush the interrupt holdoff timer */
2156 writel(0x000, dev->base + IHR);
2157 writel(0x100, dev->base + IHR);
2158 writel(0x000, dev->base + IHR);
2159
2160 /* Set Rx to full duplex, don't accept runt, errored, long or length
2161 * range errored packets. Use 512 byte DMA.
2162 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002163 /* Ramit : 1024 DMA is not a good idea, it ends up banging
2164 * some DELL and COMPAQ SMP systems
Linus Torvalds1da177e2005-04-16 15:20:36 -07002165 * Turn on ALP, only we are accpeting Jumbo Packets */
2166 writel(RXCFG_AEP | RXCFG_ARP | RXCFG_AIRL | RXCFG_RX_FD
2167 | RXCFG_STRIPCRC
2168 //| RXCFG_ALP
2169 | (RXCFG_MXDMA512) | 0, dev->base + RXCFG);
2170
2171 /* Disable priority queueing */
2172 writel(0, dev->base + PQCR);
2173
2174 /* Enable IP checksum validation and detetion of VLAN headers.
2175 * Note: do not set the reject options as at least the 0x102
2176 * revision of the chip does not properly accept IP fragments
2177 * at least for UDP.
2178 */
2179 /* Ramit : Be sure to turn on RXCFG_ARP if VLAN's are enabled, since
2180 * the MAC it calculates the packetsize AFTER stripping the VLAN
2181 * header, and if a VLAN Tagged packet of 64 bytes is received (like
2182 * a ping with a VLAN header) then the card, strips the 4 byte VLAN
2183 * tag and then checks the packet size, so if RXCFG_ARP is not enabled,
2184 * it discrards it!. These guys......
2185 * also turn on tag stripping if hardware acceleration is enabled
2186 */
2187#ifdef NS83820_VLAN_ACCEL_SUPPORT
Jeff Garzik6aa20a22006-09-13 13:24:59 -04002188#define VRCR_INIT_VALUE (VRCR_IPEN|VRCR_VTDEN|VRCR_VTREN)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002189#else
2190#define VRCR_INIT_VALUE (VRCR_IPEN|VRCR_VTDEN)
2191#endif
2192 writel(VRCR_INIT_VALUE, dev->base + VRCR);
2193
2194 /* Enable per-packet TCP/UDP/IP checksumming
2195 * and per packet vlan tag insertion if
2196 * vlan hardware acceleration is enabled
2197 */
2198#ifdef NS83820_VLAN_ACCEL_SUPPORT
2199#define VTCR_INIT_VALUE (VTCR_PPCHK|VTCR_VPPTI)
2200#else
2201#define VTCR_INIT_VALUE VTCR_PPCHK
2202#endif
2203 writel(VTCR_INIT_VALUE, dev->base + VTCR);
2204
2205 /* Ramit : Enable async and sync pause frames */
2206 /* writel(0, dev->base + PCR); */
2207 writel((PCR_PS_MCAST | PCR_PS_DA | PCR_PSEN | PCR_FFLO_4K |
2208 PCR_FFHI_8K | PCR_STLO_4 | PCR_STHI_8 | PCR_PAUSE_CNT),
2209 dev->base + PCR);
2210
2211 /* Disable Wake On Lan */
2212 writel(0, dev->base + WCSR);
2213
2214 ns83820_getmac(dev, ndev->dev_addr);
2215
2216 /* Yes, we support dumb IP checksum on transmit */
2217 ndev->features |= NETIF_F_SG;
2218 ndev->features |= NETIF_F_IP_CSUM;
2219
2220#ifdef NS83820_VLAN_ACCEL_SUPPORT
2221 /* We also support hardware vlan acceleration */
2222 ndev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002223#endif
2224
2225 if (using_dac) {
2226 printk(KERN_INFO "%s: using 64 bit addressing.\n",
2227 ndev->name);
2228 ndev->features |= NETIF_F_HIGHDMA;
2229 }
2230
Johannes Berge1749612008-10-27 15:59:26 -07002231 printk(KERN_INFO "%s: ns83820 v" VERSION ": DP83820 v%u.%u: %pM io=0x%08lx irq=%d f=%s\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07002232 ndev->name,
2233 (unsigned)readl(dev->base + SRR) >> 8,
2234 (unsigned)readl(dev->base + SRR) & 0xff,
Johannes Berge1749612008-10-27 15:59:26 -07002235 ndev->dev_addr, addr, pci_dev->irq,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002236 (ndev->features & NETIF_F_HIGHDMA) ? "h,sg" : "sg"
2237 );
2238
2239#ifdef PHY_CODE_IS_FINISHED
2240 ns83820_probe_phy(ndev);
2241#endif
2242
2243 err = register_netdevice(ndev);
2244 if (err) {
2245 printk(KERN_INFO "ns83820: unable to register netdev: %d\n", err);
2246 goto out_cleanup;
2247 }
2248 rtnl_unlock();
2249
2250 return 0;
2251
2252out_cleanup:
Denis Kirjanov1a9f28c2010-08-30 21:19:15 +00002253 ns83820_disable_interrupts(dev); /* paranoia */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254out_free_irq:
2255 rtnl_unlock();
2256 free_irq(pci_dev->irq, ndev);
2257out_disable:
2258 if (dev->base)
2259 iounmap(dev->base);
2260 pci_free_consistent(pci_dev, 4 * DESC_SIZE * NR_TX_DESC, dev->tx_descs, dev->tx_phy_descs);
2261 pci_free_consistent(pci_dev, 4 * DESC_SIZE * NR_RX_DESC, dev->rx_info.descs, dev->rx_info.phy_descs);
2262 pci_disable_device(pci_dev);
2263out_free:
2264 free_netdev(ndev);
2265 pci_set_drvdata(pci_dev, NULL);
2266out:
2267 return err;
2268}
2269
2270static void __devexit ns83820_remove_one(struct pci_dev *pci_dev)
2271{
2272 struct net_device *ndev = pci_get_drvdata(pci_dev);
2273 struct ns83820 *dev = PRIV(ndev); /* ok even if NULL */
2274
2275 if (!ndev) /* paranoia */
2276 return;
2277
Denis Kirjanov1a9f28c2010-08-30 21:19:15 +00002278 ns83820_disable_interrupts(dev); /* paranoia */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002279
2280 unregister_netdev(ndev);
2281 free_irq(dev->pci_dev->irq, ndev);
2282 iounmap(dev->base);
2283 pci_free_consistent(dev->pci_dev, 4 * DESC_SIZE * NR_TX_DESC,
2284 dev->tx_descs, dev->tx_phy_descs);
2285 pci_free_consistent(dev->pci_dev, 4 * DESC_SIZE * NR_RX_DESC,
2286 dev->rx_info.descs, dev->rx_info.phy_descs);
2287 pci_disable_device(dev->pci_dev);
2288 free_netdev(ndev);
2289 pci_set_drvdata(pci_dev, NULL);
2290}
2291
Alexey Dobriyana3aa1882010-01-07 11:58:11 +00002292static DEFINE_PCI_DEVICE_TABLE(ns83820_pci_tbl) = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002293 { 0x100b, 0x0022, PCI_ANY_ID, PCI_ANY_ID, 0, .driver_data = 0, },
2294 { 0, },
2295};
2296
2297static struct pci_driver driver = {
2298 .name = "ns83820",
2299 .id_table = ns83820_pci_tbl,
2300 .probe = ns83820_init_one,
2301 .remove = __devexit_p(ns83820_remove_one),
2302#if 0 /* FIXME: implement */
2303 .suspend = ,
2304 .resume = ,
2305#endif
2306};
2307
2308
2309static int __init ns83820_init(void)
2310{
2311 printk(KERN_INFO "ns83820.c: National Semiconductor DP83820 10/100/1000 driver.\n");
Jeff Garzik29917622006-08-19 17:48:59 -04002312 return pci_register_driver(&driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313}
2314
2315static void __exit ns83820_exit(void)
2316{
2317 pci_unregister_driver(&driver);
2318}
2319
2320MODULE_AUTHOR("Benjamin LaHaise <bcrl@kvack.org>");
2321MODULE_DESCRIPTION("National Semiconductor DP83820 10/100/1000 driver");
2322MODULE_LICENSE("GPL");
2323
2324MODULE_DEVICE_TABLE(pci, ns83820_pci_tbl);
2325
2326module_param(lnksts, int, 0);
2327MODULE_PARM_DESC(lnksts, "Polarity of LNKSTS bit");
2328
2329module_param(ihr, int, 0);
2330MODULE_PARM_DESC(ihr, "Time in 100 us increments to delay interrupts (range 0-127)");
2331
2332module_param(reset_phy, int, 0);
2333MODULE_PARM_DESC(reset_phy, "Set to 1 to reset the PHY on startup");
2334
2335module_init(ns83820_init);
2336module_exit(ns83820_exit);