Commit | Line | Data |
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10096974 | 1 | #define VERSION "0.23" |
1da177e4 LT |
2 | /* 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. | |
1da177e4 LT |
66 | * 20040828 0.21 - add hardware vlan accleration |
67 | * by Neil Horman <nhorman@redhat.com> | |
6aa20a22 | 68 | * 20050406 0.22 - improved DAC ifdefs from Andi Kleen |
c16ef1ce BL |
69 | * - removal of dead code from Adrian Bunk |
70 | * - fix half duplex collision behaviour | |
1da177e4 LT |
71 | * 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 | ||
1da177e4 LT |
99 | #include <linux/module.h> |
100 | #include <linux/moduleparam.h> | |
101 | #include <linux/types.h> | |
102 | #include <linux/pci.h> | |
1e7f0bd8 | 103 | #include <linux/dma-mapping.h> |
1da177e4 LT |
104 | #include <linux/netdevice.h> |
105 | #include <linux/etherdevice.h> | |
106 | #include <linux/delay.h> | |
1da177e4 LT |
107 | #include <linux/workqueue.h> |
108 | #include <linux/init.h> | |
109 | #include <linux/ip.h> /* for iph */ | |
110 | #include <linux/in.h> /* for IPPROTO_... */ | |
1da177e4 LT |
111 | #include <linux/compiler.h> |
112 | #include <linux/prefetch.h> | |
113 | #include <linux/ethtool.h> | |
114 | #include <linux/timer.h> | |
115 | #include <linux/if_vlan.h> | |
14c85021 | 116 | #include <linux/rtnetlink.h> |
ff5688ae | 117 | #include <linux/jiffies.h> |
1da177e4 LT |
118 | |
119 | #include <asm/io.h> | |
120 | #include <asm/uaccess.h> | |
121 | #include <asm/system.h> | |
122 | ||
123 | #define DRV_NAME "ns83820" | |
124 | ||
125 | /* Global parameters. See module_param near the bottom. */ | |
126 | static int ihr = 2; | |
127 | static int reset_phy = 0; | |
128 | static int lnksts = 0; /* CFG_LNKSTS bit polarity */ | |
129 | ||
130 | /* Dprintk is used for more interesting debug events */ | |
131 | #undef Dprintk | |
132 | #define Dprintk dprintk | |
133 | ||
1da177e4 LT |
134 | /* tunables */ |
135 | #define RX_BUF_SIZE 1500 /* 8192 */ | |
136 | #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) | |
137 | #define NS83820_VLAN_ACCEL_SUPPORT | |
138 | #endif | |
139 | ||
140 | /* Must not exceed ~65000. */ | |
141 | #define NR_RX_DESC 64 | |
142 | #define NR_TX_DESC 128 | |
143 | ||
144 | /* not tunable */ | |
145 | #define REAL_RX_BUF_SIZE (RX_BUF_SIZE + 14) /* rx/tx mac addr + type */ | |
146 | ||
147 | #define MIN_TX_DESC_FREE 8 | |
148 | ||
149 | /* register defines */ | |
150 | #define CFGCS 0x04 | |
151 | ||
152 | #define CR_TXE 0x00000001 | |
153 | #define CR_TXD 0x00000002 | |
154 | /* Ramit : Here's a tip, don't do a RXD immediately followed by an RXE | |
155 | * The Receive engine skips one descriptor and moves | |
156 | * onto the next one!! */ | |
157 | #define CR_RXE 0x00000004 | |
158 | #define CR_RXD 0x00000008 | |
159 | #define CR_TXR 0x00000010 | |
160 | #define CR_RXR 0x00000020 | |
161 | #define CR_SWI 0x00000080 | |
162 | #define CR_RST 0x00000100 | |
163 | ||
164 | #define PTSCR_EEBIST_FAIL 0x00000001 | |
165 | #define PTSCR_EEBIST_EN 0x00000002 | |
166 | #define PTSCR_EELOAD_EN 0x00000004 | |
167 | #define PTSCR_RBIST_FAIL 0x000001b8 | |
168 | #define PTSCR_RBIST_DONE 0x00000200 | |
169 | #define PTSCR_RBIST_EN 0x00000400 | |
170 | #define PTSCR_RBIST_RST 0x00002000 | |
171 | ||
172 | #define MEAR_EEDI 0x00000001 | |
173 | #define MEAR_EEDO 0x00000002 | |
174 | #define MEAR_EECLK 0x00000004 | |
175 | #define MEAR_EESEL 0x00000008 | |
176 | #define MEAR_MDIO 0x00000010 | |
177 | #define MEAR_MDDIR 0x00000020 | |
178 | #define MEAR_MDC 0x00000040 | |
179 | ||
180 | #define ISR_TXDESC3 0x40000000 | |
181 | #define ISR_TXDESC2 0x20000000 | |
182 | #define ISR_TXDESC1 0x10000000 | |
183 | #define ISR_TXDESC0 0x08000000 | |
184 | #define ISR_RXDESC3 0x04000000 | |
185 | #define ISR_RXDESC2 0x02000000 | |
186 | #define ISR_RXDESC1 0x01000000 | |
187 | #define ISR_RXDESC0 0x00800000 | |
188 | #define ISR_TXRCMP 0x00400000 | |
189 | #define ISR_RXRCMP 0x00200000 | |
190 | #define ISR_DPERR 0x00100000 | |
191 | #define ISR_SSERR 0x00080000 | |
192 | #define ISR_RMABT 0x00040000 | |
193 | #define ISR_RTABT 0x00020000 | |
194 | #define ISR_RXSOVR 0x00010000 | |
195 | #define ISR_HIBINT 0x00008000 | |
196 | #define ISR_PHY 0x00004000 | |
197 | #define ISR_PME 0x00002000 | |
198 | #define ISR_SWI 0x00001000 | |
199 | #define ISR_MIB 0x00000800 | |
200 | #define ISR_TXURN 0x00000400 | |
201 | #define ISR_TXIDLE 0x00000200 | |
202 | #define ISR_TXERR 0x00000100 | |
203 | #define ISR_TXDESC 0x00000080 | |
204 | #define ISR_TXOK 0x00000040 | |
205 | #define ISR_RXORN 0x00000020 | |
206 | #define ISR_RXIDLE 0x00000010 | |
207 | #define ISR_RXEARLY 0x00000008 | |
208 | #define ISR_RXERR 0x00000004 | |
209 | #define ISR_RXDESC 0x00000002 | |
210 | #define ISR_RXOK 0x00000001 | |
211 | ||
212 | #define TXCFG_CSI 0x80000000 | |
213 | #define TXCFG_HBI 0x40000000 | |
214 | #define TXCFG_MLB 0x20000000 | |
215 | #define TXCFG_ATP 0x10000000 | |
216 | #define TXCFG_ECRETRY 0x00800000 | |
217 | #define TXCFG_BRST_DIS 0x00080000 | |
218 | #define TXCFG_MXDMA1024 0x00000000 | |
219 | #define TXCFG_MXDMA512 0x00700000 | |
220 | #define TXCFG_MXDMA256 0x00600000 | |
221 | #define TXCFG_MXDMA128 0x00500000 | |
222 | #define TXCFG_MXDMA64 0x00400000 | |
223 | #define TXCFG_MXDMA32 0x00300000 | |
224 | #define TXCFG_MXDMA16 0x00200000 | |
225 | #define TXCFG_MXDMA8 0x00100000 | |
226 | ||
227 | #define CFG_LNKSTS 0x80000000 | |
228 | #define CFG_SPDSTS 0x60000000 | |
229 | #define CFG_SPDSTS1 0x40000000 | |
230 | #define CFG_SPDSTS0 0x20000000 | |
231 | #define CFG_DUPSTS 0x10000000 | |
232 | #define CFG_TBI_EN 0x01000000 | |
233 | #define CFG_MODE_1000 0x00400000 | |
234 | /* Ramit : Dont' ever use AUTO_1000, it never works and is buggy. | |
235 | * Read the Phy response and then configure the MAC accordingly */ | |
236 | #define CFG_AUTO_1000 0x00200000 | |
237 | #define CFG_PINT_CTL 0x001c0000 | |
238 | #define CFG_PINT_DUPSTS 0x00100000 | |
239 | #define CFG_PINT_LNKSTS 0x00080000 | |
240 | #define CFG_PINT_SPDSTS 0x00040000 | |
241 | #define CFG_TMRTEST 0x00020000 | |
242 | #define CFG_MRM_DIS 0x00010000 | |
243 | #define CFG_MWI_DIS 0x00008000 | |
244 | #define CFG_T64ADDR 0x00004000 | |
245 | #define CFG_PCI64_DET 0x00002000 | |
246 | #define CFG_DATA64_EN 0x00001000 | |
247 | #define CFG_M64ADDR 0x00000800 | |
248 | #define CFG_PHY_RST 0x00000400 | |
249 | #define CFG_PHY_DIS 0x00000200 | |
250 | #define CFG_EXTSTS_EN 0x00000100 | |
251 | #define CFG_REQALG 0x00000080 | |
252 | #define CFG_SB 0x00000040 | |
253 | #define CFG_POW 0x00000020 | |
254 | #define CFG_EXD 0x00000010 | |
255 | #define CFG_PESEL 0x00000008 | |
256 | #define CFG_BROM_DIS 0x00000004 | |
257 | #define CFG_EXT_125 0x00000002 | |
258 | #define CFG_BEM 0x00000001 | |
259 | ||
260 | #define EXTSTS_UDPPKT 0x00200000 | |
261 | #define EXTSTS_TCPPKT 0x00080000 | |
262 | #define EXTSTS_IPPKT 0x00020000 | |
263 | #define EXTSTS_VPKT 0x00010000 | |
264 | #define EXTSTS_VTG_MASK 0x0000ffff | |
265 | ||
266 | #define SPDSTS_POLARITY (CFG_SPDSTS1 | CFG_SPDSTS0 | CFG_DUPSTS | (lnksts ? CFG_LNKSTS : 0)) | |
267 | ||
268 | #define MIBC_MIBS 0x00000008 | |
269 | #define MIBC_ACLR 0x00000004 | |
270 | #define MIBC_FRZ 0x00000002 | |
271 | #define MIBC_WRN 0x00000001 | |
272 | ||
273 | #define PCR_PSEN (1 << 31) | |
274 | #define PCR_PS_MCAST (1 << 30) | |
275 | #define PCR_PS_DA (1 << 29) | |
276 | #define PCR_STHI_8 (3 << 23) | |
277 | #define PCR_STLO_4 (1 << 23) | |
278 | #define PCR_FFHI_8K (3 << 21) | |
279 | #define PCR_FFLO_4K (1 << 21) | |
280 | #define PCR_PAUSE_CNT 0xFFFE | |
281 | ||
282 | #define RXCFG_AEP 0x80000000 | |
283 | #define RXCFG_ARP 0x40000000 | |
284 | #define RXCFG_STRIPCRC 0x20000000 | |
285 | #define RXCFG_RX_FD 0x10000000 | |
286 | #define RXCFG_ALP 0x08000000 | |
287 | #define RXCFG_AIRL 0x04000000 | |
288 | #define RXCFG_MXDMA512 0x00700000 | |
289 | #define RXCFG_DRTH 0x0000003e | |
290 | #define RXCFG_DRTH0 0x00000002 | |
291 | ||
292 | #define RFCR_RFEN 0x80000000 | |
293 | #define RFCR_AAB 0x40000000 | |
294 | #define RFCR_AAM 0x20000000 | |
295 | #define RFCR_AAU 0x10000000 | |
296 | #define RFCR_APM 0x08000000 | |
297 | #define RFCR_APAT 0x07800000 | |
298 | #define RFCR_APAT3 0x04000000 | |
299 | #define RFCR_APAT2 0x02000000 | |
300 | #define RFCR_APAT1 0x01000000 | |
301 | #define RFCR_APAT0 0x00800000 | |
302 | #define RFCR_AARP 0x00400000 | |
303 | #define RFCR_MHEN 0x00200000 | |
304 | #define RFCR_UHEN 0x00100000 | |
305 | #define RFCR_ULM 0x00080000 | |
306 | ||
307 | #define VRCR_RUDPE 0x00000080 | |
308 | #define VRCR_RTCPE 0x00000040 | |
309 | #define VRCR_RIPE 0x00000020 | |
310 | #define VRCR_IPEN 0x00000010 | |
311 | #define VRCR_DUTF 0x00000008 | |
312 | #define VRCR_DVTF 0x00000004 | |
313 | #define VRCR_VTREN 0x00000002 | |
314 | #define VRCR_VTDEN 0x00000001 | |
315 | ||
316 | #define VTCR_PPCHK 0x00000008 | |
317 | #define VTCR_GCHK 0x00000004 | |
318 | #define VTCR_VPPTI 0x00000002 | |
319 | #define VTCR_VGTI 0x00000001 | |
320 | ||
321 | #define CR 0x00 | |
322 | #define CFG 0x04 | |
323 | #define MEAR 0x08 | |
324 | #define PTSCR 0x0c | |
325 | #define ISR 0x10 | |
326 | #define IMR 0x14 | |
327 | #define IER 0x18 | |
328 | #define IHR 0x1c | |
329 | #define TXDP 0x20 | |
330 | #define TXDP_HI 0x24 | |
331 | #define TXCFG 0x28 | |
332 | #define GPIOR 0x2c | |
333 | #define RXDP 0x30 | |
334 | #define RXDP_HI 0x34 | |
335 | #define RXCFG 0x38 | |
336 | #define PQCR 0x3c | |
337 | #define WCSR 0x40 | |
338 | #define PCR 0x44 | |
339 | #define RFCR 0x48 | |
340 | #define RFDR 0x4c | |
341 | ||
342 | #define SRR 0x58 | |
343 | ||
344 | #define VRCR 0xbc | |
345 | #define VTCR 0xc0 | |
346 | #define VDR 0xc4 | |
347 | #define CCSR 0xcc | |
348 | ||
349 | #define TBICR 0xe0 | |
350 | #define TBISR 0xe4 | |
351 | #define TANAR 0xe8 | |
352 | #define TANLPAR 0xec | |
353 | #define TANER 0xf0 | |
354 | #define TESR 0xf4 | |
355 | ||
356 | #define TBICR_MR_AN_ENABLE 0x00001000 | |
357 | #define TBICR_MR_RESTART_AN 0x00000200 | |
358 | ||
359 | #define TBISR_MR_LINK_STATUS 0x00000020 | |
360 | #define TBISR_MR_AN_COMPLETE 0x00000004 | |
361 | ||
362 | #define TANAR_PS2 0x00000100 | |
363 | #define TANAR_PS1 0x00000080 | |
364 | #define TANAR_HALF_DUP 0x00000040 | |
365 | #define TANAR_FULL_DUP 0x00000020 | |
366 | ||
367 | #define GPIOR_GP5_OE 0x00000200 | |
368 | #define GPIOR_GP4_OE 0x00000100 | |
369 | #define GPIOR_GP3_OE 0x00000080 | |
370 | #define GPIOR_GP2_OE 0x00000040 | |
371 | #define GPIOR_GP1_OE 0x00000020 | |
372 | #define GPIOR_GP3_OUT 0x00000004 | |
373 | #define GPIOR_GP1_OUT 0x00000001 | |
374 | ||
375 | #define LINK_AUTONEGOTIATE 0x01 | |
376 | #define LINK_DOWN 0x02 | |
377 | #define LINK_UP 0x04 | |
378 | ||
6aa20a22 | 379 | #define HW_ADDR_LEN sizeof(dma_addr_t) |
1da177e4 LT |
380 | #define desc_addr_set(desc, addr) \ |
381 | do { \ | |
c16ef1ce BL |
382 | ((desc)[0] = cpu_to_le32(addr)); \ |
383 | if (HW_ADDR_LEN == 8) \ | |
384 | (desc)[1] = cpu_to_le32(((u64)addr) >> 32); \ | |
1da177e4 LT |
385 | } while(0) |
386 | #define desc_addr_get(desc) \ | |
c16ef1ce BL |
387 | (le32_to_cpu((desc)[0]) | \ |
388 | (HW_ADDR_LEN == 8 ? ((dma_addr_t)le32_to_cpu((desc)[1]))<<32 : 0)) | |
1da177e4 LT |
389 | |
390 | #define DESC_LINK 0 | |
391 | #define DESC_BUFPTR (DESC_LINK + HW_ADDR_LEN/4) | |
392 | #define DESC_CMDSTS (DESC_BUFPTR + HW_ADDR_LEN/4) | |
393 | #define DESC_EXTSTS (DESC_CMDSTS + 4/4) | |
394 | ||
395 | #define CMDSTS_OWN 0x80000000 | |
396 | #define CMDSTS_MORE 0x40000000 | |
397 | #define CMDSTS_INTR 0x20000000 | |
398 | #define CMDSTS_ERR 0x10000000 | |
399 | #define CMDSTS_OK 0x08000000 | |
400 | #define CMDSTS_RUNT 0x00200000 | |
401 | #define CMDSTS_LEN_MASK 0x0000ffff | |
402 | ||
403 | #define CMDSTS_DEST_MASK 0x01800000 | |
404 | #define CMDSTS_DEST_SELF 0x00800000 | |
405 | #define CMDSTS_DEST_MULTI 0x01000000 | |
406 | ||
407 | #define DESC_SIZE 8 /* Should be cache line sized */ | |
408 | ||
409 | struct rx_info { | |
410 | spinlock_t lock; | |
411 | int up; | |
412 | long idle; | |
413 | ||
414 | struct sk_buff *skbs[NR_RX_DESC]; | |
415 | ||
c69fda4e | 416 | __le32 *next_rx_desc; |
1da177e4 LT |
417 | u16 next_rx, next_empty; |
418 | ||
c69fda4e | 419 | __le32 *descs; |
1da177e4 LT |
420 | dma_addr_t phy_descs; |
421 | }; | |
422 | ||
423 | ||
424 | struct ns83820 { | |
425 | struct net_device_stats stats; | |
426 | u8 __iomem *base; | |
427 | ||
428 | struct pci_dev *pci_dev; | |
c4028958 | 429 | struct net_device *ndev; |
1da177e4 LT |
430 | |
431 | #ifdef NS83820_VLAN_ACCEL_SUPPORT | |
432 | struct vlan_group *vlgrp; | |
433 | #endif | |
434 | ||
435 | struct rx_info rx_info; | |
436 | struct tasklet_struct rx_tasklet; | |
437 | ||
438 | unsigned ihr; | |
439 | struct work_struct tq_refill; | |
440 | ||
441 | /* protects everything below. irqsave when using. */ | |
442 | spinlock_t misc_lock; | |
443 | ||
444 | u32 CFG_cache; | |
445 | ||
446 | u32 MEAR_cache; | |
447 | u32 IMR_cache; | |
1da177e4 LT |
448 | |
449 | unsigned linkstate; | |
450 | ||
451 | spinlock_t tx_lock; | |
452 | ||
453 | u16 tx_done_idx; | |
454 | u16 tx_idx; | |
455 | volatile u16 tx_free_idx; /* idx of free desc chain */ | |
456 | u16 tx_intr_idx; | |
457 | ||
458 | atomic_t nr_tx_skbs; | |
459 | struct sk_buff *tx_skbs[NR_TX_DESC]; | |
460 | ||
461 | char pad[16] __attribute__((aligned(16))); | |
c69fda4e | 462 | __le32 *tx_descs; |
1da177e4 LT |
463 | dma_addr_t tx_phy_descs; |
464 | ||
465 | struct timer_list tx_watchdog; | |
466 | }; | |
467 | ||
468 | static inline struct ns83820 *PRIV(struct net_device *dev) | |
469 | { | |
470 | return netdev_priv(dev); | |
471 | } | |
472 | ||
473 | #define __kick_rx(dev) writel(CR_RXE, dev->base + CR) | |
474 | ||
475 | static inline void kick_rx(struct net_device *ndev) | |
476 | { | |
477 | struct ns83820 *dev = PRIV(ndev); | |
478 | dprintk("kick_rx: maybe kicking\n"); | |
479 | if (test_and_clear_bit(0, &dev->rx_info.idle)) { | |
480 | dprintk("actually kicking\n"); | |
481 | writel(dev->rx_info.phy_descs + | |
482 | (4 * DESC_SIZE * dev->rx_info.next_rx), | |
483 | dev->base + RXDP); | |
484 | if (dev->rx_info.next_rx == dev->rx_info.next_empty) | |
485 | printk(KERN_DEBUG "%s: uh-oh: next_rx == next_empty???\n", | |
486 | ndev->name); | |
487 | __kick_rx(dev); | |
488 | } | |
489 | } | |
490 | ||
491 | //free = (tx_done_idx + NR_TX_DESC-2 - free_idx) % NR_TX_DESC | |
492 | #define start_tx_okay(dev) \ | |
493 | (((NR_TX_DESC-2 + dev->tx_done_idx - dev->tx_free_idx) % NR_TX_DESC) > MIN_TX_DESC_FREE) | |
494 | ||
495 | ||
6aa20a22 | 496 | #ifdef NS83820_VLAN_ACCEL_SUPPORT |
1da177e4 LT |
497 | static void ns83820_vlan_rx_register(struct net_device *ndev, struct vlan_group *grp) |
498 | { | |
499 | struct ns83820 *dev = PRIV(ndev); | |
500 | ||
501 | spin_lock_irq(&dev->misc_lock); | |
502 | spin_lock(&dev->tx_lock); | |
503 | ||
504 | dev->vlgrp = grp; | |
505 | ||
506 | spin_unlock(&dev->tx_lock); | |
507 | spin_unlock_irq(&dev->misc_lock); | |
508 | } | |
1da177e4 LT |
509 | #endif |
510 | ||
511 | /* Packet Receiver | |
512 | * | |
513 | * The hardware supports linked lists of receive descriptors for | |
514 | * which ownership is transfered back and forth by means of an | |
515 | * ownership bit. While the hardware does support the use of a | |
516 | * ring for receive descriptors, we only make use of a chain in | |
517 | * an attempt to reduce bus traffic under heavy load scenarios. | |
518 | * This will also make bugs a bit more obvious. The current code | |
519 | * only makes use of a single rx chain; I hope to implement | |
520 | * priority based rx for version 1.0. Goal: even under overload | |
521 | * conditions, still route realtime traffic with as low jitter as | |
522 | * possible. | |
523 | */ | |
c69fda4e | 524 | static inline void build_rx_desc(struct ns83820 *dev, __le32 *desc, dma_addr_t link, dma_addr_t buf, u32 cmdsts, u32 extsts) |
1da177e4 LT |
525 | { |
526 | desc_addr_set(desc + DESC_LINK, link); | |
527 | desc_addr_set(desc + DESC_BUFPTR, buf); | |
528 | desc[DESC_EXTSTS] = cpu_to_le32(extsts); | |
529 | mb(); | |
530 | desc[DESC_CMDSTS] = cpu_to_le32(cmdsts); | |
531 | } | |
532 | ||
533 | #define nr_rx_empty(dev) ((NR_RX_DESC-2 + dev->rx_info.next_rx - dev->rx_info.next_empty) % NR_RX_DESC) | |
534 | static inline int ns83820_add_rx_skb(struct ns83820 *dev, struct sk_buff *skb) | |
535 | { | |
536 | unsigned next_empty; | |
537 | u32 cmdsts; | |
c69fda4e | 538 | __le32 *sg; |
1da177e4 LT |
539 | dma_addr_t buf; |
540 | ||
541 | next_empty = dev->rx_info.next_empty; | |
542 | ||
543 | /* don't overrun last rx marker */ | |
544 | if (unlikely(nr_rx_empty(dev) <= 2)) { | |
545 | kfree_skb(skb); | |
546 | return 1; | |
547 | } | |
548 | ||
549 | #if 0 | |
550 | dprintk("next_empty[%d] nr_used[%d] next_rx[%d]\n", | |
551 | dev->rx_info.next_empty, | |
552 | dev->rx_info.nr_used, | |
553 | dev->rx_info.next_rx | |
554 | ); | |
555 | #endif | |
556 | ||
557 | sg = dev->rx_info.descs + (next_empty * DESC_SIZE); | |
5d9428de | 558 | BUG_ON(NULL != dev->rx_info.skbs[next_empty]); |
1da177e4 LT |
559 | dev->rx_info.skbs[next_empty] = skb; |
560 | ||
561 | dev->rx_info.next_empty = (next_empty + 1) % NR_RX_DESC; | |
562 | cmdsts = REAL_RX_BUF_SIZE | CMDSTS_INTR; | |
689be439 | 563 | buf = pci_map_single(dev->pci_dev, skb->data, |
1da177e4 LT |
564 | REAL_RX_BUF_SIZE, PCI_DMA_FROMDEVICE); |
565 | build_rx_desc(dev, sg, 0, buf, cmdsts, 0); | |
566 | /* update link of previous rx */ | |
567 | if (likely(next_empty != dev->rx_info.next_rx)) | |
568 | 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)); | |
569 | ||
570 | return 0; | |
571 | } | |
572 | ||
dd0fc66f | 573 | static inline int rx_refill(struct net_device *ndev, gfp_t gfp) |
1da177e4 LT |
574 | { |
575 | struct ns83820 *dev = PRIV(ndev); | |
576 | unsigned i; | |
577 | unsigned long flags = 0; | |
578 | ||
579 | if (unlikely(nr_rx_empty(dev) <= 2)) | |
580 | return 0; | |
581 | ||
582 | dprintk("rx_refill(%p)\n", ndev); | |
583 | if (gfp == GFP_ATOMIC) | |
584 | spin_lock_irqsave(&dev->rx_info.lock, flags); | |
585 | for (i=0; i<NR_RX_DESC; i++) { | |
586 | struct sk_buff *skb; | |
587 | long res; | |
e83728c7 | 588 | |
1da177e4 | 589 | /* extra 16 bytes for alignment */ |
e83728c7 | 590 | skb = __netdev_alloc_skb(ndev, REAL_RX_BUF_SIZE+16, gfp); |
1da177e4 LT |
591 | if (unlikely(!skb)) |
592 | break; | |
593 | ||
e83728c7 | 594 | skb_reserve(skb, skb->data - PTR_ALIGN(skb->data, 16)); |
1da177e4 LT |
595 | if (gfp != GFP_ATOMIC) |
596 | spin_lock_irqsave(&dev->rx_info.lock, flags); | |
597 | res = ns83820_add_rx_skb(dev, skb); | |
598 | if (gfp != GFP_ATOMIC) | |
599 | spin_unlock_irqrestore(&dev->rx_info.lock, flags); | |
600 | if (res) { | |
601 | i = 1; | |
602 | break; | |
603 | } | |
604 | } | |
605 | if (gfp == GFP_ATOMIC) | |
606 | spin_unlock_irqrestore(&dev->rx_info.lock, flags); | |
607 | ||
608 | return i ? 0 : -ENOMEM; | |
609 | } | |
610 | ||
7eefb04e | 611 | static void rx_refill_atomic(struct net_device *ndev) |
1da177e4 LT |
612 | { |
613 | rx_refill(ndev, GFP_ATOMIC); | |
614 | } | |
615 | ||
616 | /* REFILL */ | |
c4028958 | 617 | static inline void queue_refill(struct work_struct *work) |
1da177e4 | 618 | { |
c4028958 DH |
619 | struct ns83820 *dev = container_of(work, struct ns83820, tq_refill); |
620 | struct net_device *ndev = dev->ndev; | |
1da177e4 LT |
621 | |
622 | rx_refill(ndev, GFP_KERNEL); | |
623 | if (dev->rx_info.up) | |
624 | kick_rx(ndev); | |
625 | } | |
626 | ||
627 | static inline void clear_rx_desc(struct ns83820 *dev, unsigned i) | |
628 | { | |
629 | build_rx_desc(dev, dev->rx_info.descs + (DESC_SIZE * i), 0, 0, CMDSTS_OWN, 0); | |
630 | } | |
631 | ||
7eefb04e | 632 | static void phy_intr(struct net_device *ndev) |
1da177e4 LT |
633 | { |
634 | struct ns83820 *dev = PRIV(ndev); | |
f71e1309 | 635 | static const char *speeds[] = { "10", "100", "1000", "1000(?)", "1000F" }; |
1da177e4 LT |
636 | u32 cfg, new_cfg; |
637 | u32 tbisr, tanar, tanlpar; | |
638 | int speed, fullduplex, newlinkstate; | |
639 | ||
640 | cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY; | |
641 | ||
642 | if (dev->CFG_cache & CFG_TBI_EN) { | |
643 | /* we have an optical transceiver */ | |
644 | tbisr = readl(dev->base + TBISR); | |
645 | tanar = readl(dev->base + TANAR); | |
646 | tanlpar = readl(dev->base + TANLPAR); | |
647 | dprintk("phy_intr: tbisr=%08x, tanar=%08x, tanlpar=%08x\n", | |
648 | tbisr, tanar, tanlpar); | |
649 | ||
650 | if ( (fullduplex = (tanlpar & TANAR_FULL_DUP) | |
651 | && (tanar & TANAR_FULL_DUP)) ) { | |
652 | ||
653 | /* both of us are full duplex */ | |
654 | writel(readl(dev->base + TXCFG) | |
655 | | TXCFG_CSI | TXCFG_HBI | TXCFG_ATP, | |
656 | dev->base + TXCFG); | |
657 | writel(readl(dev->base + RXCFG) | RXCFG_RX_FD, | |
658 | dev->base + RXCFG); | |
659 | /* Light up full duplex LED */ | |
660 | writel(readl(dev->base + GPIOR) | GPIOR_GP1_OUT, | |
661 | dev->base + GPIOR); | |
662 | ||
663 | } else if(((tanlpar & TANAR_HALF_DUP) | |
664 | && (tanar & TANAR_HALF_DUP)) | |
665 | || ((tanlpar & TANAR_FULL_DUP) | |
666 | && (tanar & TANAR_HALF_DUP)) | |
667 | || ((tanlpar & TANAR_HALF_DUP) | |
668 | && (tanar & TANAR_FULL_DUP))) { | |
669 | ||
670 | /* one or both of us are half duplex */ | |
671 | writel((readl(dev->base + TXCFG) | |
672 | & ~(TXCFG_CSI | TXCFG_HBI)) | TXCFG_ATP, | |
673 | dev->base + TXCFG); | |
674 | writel(readl(dev->base + RXCFG) & ~RXCFG_RX_FD, | |
675 | dev->base + RXCFG); | |
676 | /* Turn off full duplex LED */ | |
677 | writel(readl(dev->base + GPIOR) & ~GPIOR_GP1_OUT, | |
678 | dev->base + GPIOR); | |
679 | } | |
680 | ||
681 | speed = 4; /* 1000F */ | |
682 | ||
683 | } else { | |
684 | /* we have a copper transceiver */ | |
685 | new_cfg = dev->CFG_cache & ~(CFG_SB | CFG_MODE_1000 | CFG_SPDSTS); | |
686 | ||
687 | if (cfg & CFG_SPDSTS1) | |
688 | new_cfg |= CFG_MODE_1000; | |
689 | else | |
690 | new_cfg &= ~CFG_MODE_1000; | |
691 | ||
692 | speed = ((cfg / CFG_SPDSTS0) & 3); | |
693 | fullduplex = (cfg & CFG_DUPSTS); | |
694 | ||
c16ef1ce | 695 | if (fullduplex) { |
1da177e4 | 696 | new_cfg |= CFG_SB; |
c16ef1ce BL |
697 | writel(readl(dev->base + TXCFG) |
698 | | TXCFG_CSI | TXCFG_HBI, | |
699 | dev->base + TXCFG); | |
700 | writel(readl(dev->base + RXCFG) | RXCFG_RX_FD, | |
701 | dev->base + RXCFG); | |
702 | } else { | |
703 | writel(readl(dev->base + TXCFG) | |
704 | & ~(TXCFG_CSI | TXCFG_HBI), | |
705 | dev->base + TXCFG); | |
706 | writel(readl(dev->base + RXCFG) & ~(RXCFG_RX_FD), | |
707 | dev->base + RXCFG); | |
708 | } | |
1da177e4 LT |
709 | |
710 | if ((cfg & CFG_LNKSTS) && | |
c16ef1ce | 711 | ((new_cfg ^ dev->CFG_cache) != 0)) { |
1da177e4 LT |
712 | writel(new_cfg, dev->base + CFG); |
713 | dev->CFG_cache = new_cfg; | |
714 | } | |
715 | ||
716 | dev->CFG_cache &= ~CFG_SPDSTS; | |
717 | dev->CFG_cache |= cfg & CFG_SPDSTS; | |
718 | } | |
719 | ||
720 | newlinkstate = (cfg & CFG_LNKSTS) ? LINK_UP : LINK_DOWN; | |
721 | ||
722 | if (newlinkstate & LINK_UP | |
723 | && dev->linkstate != newlinkstate) { | |
724 | netif_start_queue(ndev); | |
725 | netif_wake_queue(ndev); | |
726 | printk(KERN_INFO "%s: link now %s mbps, %s duplex and up.\n", | |
727 | ndev->name, | |
728 | speeds[speed], | |
729 | fullduplex ? "full" : "half"); | |
730 | } else if (newlinkstate & LINK_DOWN | |
731 | && dev->linkstate != newlinkstate) { | |
732 | netif_stop_queue(ndev); | |
733 | printk(KERN_INFO "%s: link now down.\n", ndev->name); | |
734 | } | |
735 | ||
736 | dev->linkstate = newlinkstate; | |
737 | } | |
738 | ||
739 | static int ns83820_setup_rx(struct net_device *ndev) | |
740 | { | |
741 | struct ns83820 *dev = PRIV(ndev); | |
742 | unsigned i; | |
743 | int ret; | |
744 | ||
745 | dprintk("ns83820_setup_rx(%p)\n", ndev); | |
746 | ||
747 | dev->rx_info.idle = 1; | |
748 | dev->rx_info.next_rx = 0; | |
749 | dev->rx_info.next_rx_desc = dev->rx_info.descs; | |
750 | dev->rx_info.next_empty = 0; | |
751 | ||
752 | for (i=0; i<NR_RX_DESC; i++) | |
753 | clear_rx_desc(dev, i); | |
754 | ||
755 | writel(0, dev->base + RXDP_HI); | |
756 | writel(dev->rx_info.phy_descs, dev->base + RXDP); | |
757 | ||
758 | ret = rx_refill(ndev, GFP_KERNEL); | |
759 | if (!ret) { | |
760 | dprintk("starting receiver\n"); | |
761 | /* prevent the interrupt handler from stomping on us */ | |
762 | spin_lock_irq(&dev->rx_info.lock); | |
763 | ||
764 | writel(0x0001, dev->base + CCSR); | |
765 | writel(0, dev->base + RFCR); | |
766 | writel(0x7fc00000, dev->base + RFCR); | |
767 | writel(0xffc00000, dev->base + RFCR); | |
768 | ||
769 | dev->rx_info.up = 1; | |
770 | ||
771 | phy_intr(ndev); | |
772 | ||
773 | /* Okay, let it rip */ | |
774 | spin_lock_irq(&dev->misc_lock); | |
775 | dev->IMR_cache |= ISR_PHY; | |
776 | dev->IMR_cache |= ISR_RXRCMP; | |
777 | //dev->IMR_cache |= ISR_RXERR; | |
778 | //dev->IMR_cache |= ISR_RXOK; | |
779 | dev->IMR_cache |= ISR_RXORN; | |
780 | dev->IMR_cache |= ISR_RXSOVR; | |
781 | dev->IMR_cache |= ISR_RXDESC; | |
782 | dev->IMR_cache |= ISR_RXIDLE; | |
783 | dev->IMR_cache |= ISR_TXDESC; | |
784 | dev->IMR_cache |= ISR_TXIDLE; | |
785 | ||
786 | writel(dev->IMR_cache, dev->base + IMR); | |
787 | writel(1, dev->base + IER); | |
3a10cceb | 788 | spin_unlock(&dev->misc_lock); |
1da177e4 LT |
789 | |
790 | kick_rx(ndev); | |
791 | ||
792 | spin_unlock_irq(&dev->rx_info.lock); | |
793 | } | |
794 | return ret; | |
795 | } | |
796 | ||
797 | static void ns83820_cleanup_rx(struct ns83820 *dev) | |
798 | { | |
799 | unsigned i; | |
800 | unsigned long flags; | |
801 | ||
802 | dprintk("ns83820_cleanup_rx(%p)\n", dev); | |
803 | ||
804 | /* disable receive interrupts */ | |
805 | spin_lock_irqsave(&dev->misc_lock, flags); | |
806 | dev->IMR_cache &= ~(ISR_RXOK | ISR_RXDESC | ISR_RXERR | ISR_RXEARLY | ISR_RXIDLE); | |
807 | writel(dev->IMR_cache, dev->base + IMR); | |
808 | spin_unlock_irqrestore(&dev->misc_lock, flags); | |
809 | ||
810 | /* synchronize with the interrupt handler and kill it */ | |
811 | dev->rx_info.up = 0; | |
812 | synchronize_irq(dev->pci_dev->irq); | |
813 | ||
814 | /* touch the pci bus... */ | |
815 | readl(dev->base + IMR); | |
816 | ||
817 | /* assumes the transmitter is already disabled and reset */ | |
818 | writel(0, dev->base + RXDP_HI); | |
819 | writel(0, dev->base + RXDP); | |
820 | ||
821 | for (i=0; i<NR_RX_DESC; i++) { | |
822 | struct sk_buff *skb = dev->rx_info.skbs[i]; | |
823 | dev->rx_info.skbs[i] = NULL; | |
824 | clear_rx_desc(dev, i); | |
825 | if (skb) | |
826 | kfree_skb(skb); | |
827 | } | |
828 | } | |
829 | ||
7eefb04e | 830 | static void ns83820_rx_kick(struct net_device *ndev) |
1da177e4 LT |
831 | { |
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 | |
6aa20a22 | 849 | * |
1da177e4 | 850 | */ |
7eefb04e | 851 | static void rx_irq(struct net_device *ndev) |
1da177e4 LT |
852 | { |
853 | struct ns83820 *dev = PRIV(ndev); | |
854 | struct rx_info *info = &dev->rx_info; | |
855 | unsigned next_rx; | |
856 | int rx_rc, len; | |
c69fda4e AV |
857 | u32 cmdsts; |
858 | __le32 *desc; | |
1da177e4 LT |
859 | 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 | |
6aa20a22 | 905 | * also means that the OK bit in the descriptor |
1da177e4 LT |
906 | * 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. | |
6aa20a22 | 910 | */ |
1da177e4 | 911 | if (likely((CMDSTS_OK & cmdsts) || |
6aa20a22 | 912 | ((cmdsts & CMDSTS_RUNT) && len >= 56))) { |
1da177e4 LT |
913 | #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) | |
920 | dev->stats.multicast ++; | |
921 | dev->stats.rx_packets ++; | |
922 | dev->stats.rx_bytes += len; | |
923 | if ((extsts & 0x002a0000) && !(extsts & 0x00540000)) { | |
924 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
925 | } else { | |
926 | skb->ip_summed = CHECKSUM_NONE; | |
927 | } | |
928 | skb->protocol = eth_type_trans(skb, ndev); | |
6aa20a22 | 929 | #ifdef NS83820_VLAN_ACCEL_SUPPORT |
1da177e4 LT |
930 | 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) { | |
941 | netdev_mangle_me_harder_failed: | |
942 | dev->stats.rx_dropped ++; | |
943 | } | |
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 | ||
955 | out: | |
956 | if (0 && !nr) { | |
957 | Dprintk("dazed: cmdsts_f: %08x\n", cmdsts); | |
958 | } | |
959 | ||
960 | spin_unlock_irqrestore(&info->lock, flags); | |
961 | } | |
962 | ||
963 | static 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 | */ | |
981 | static 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 | */ | |
991 | static void do_tx_done(struct net_device *ndev) | |
992 | { | |
993 | struct ns83820 *dev = PRIV(ndev); | |
c69fda4e AV |
994 | u32 cmdsts, tx_done_idx; |
995 | __le32 *desc; | |
1da177e4 | 996 | |
1da177e4 LT |
997 | 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) | |
1010 | dev->stats.tx_errors ++; | |
1011 | if (cmdsts & CMDSTS_OK) | |
1012 | dev->stats.tx_packets ++; | |
1013 | if (cmdsts & CMDSTS_OK) | |
1014 | dev->stats.tx_bytes += cmdsts & 0xffff; | |
1015 | ||
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 | |
6aa20a22 | 1032 | pci_unmap_page(dev->pci_dev, |
1da177e4 LT |
1033 | 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 | } | |
1da177e4 LT |
1052 | } |
1053 | ||
1054 | static 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) { | |
c69fda4e | 1062 | __le32 *desc = dev->tx_descs + (i * DESC_SIZE); |
1da177e4 LT |
1063 | 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 | */ | |
1081 | static int ns83820_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev) | |
1082 | { | |
1083 | struct ns83820 *dev = PRIV(ndev); | |
1084 | u32 free_idx, cmdsts, extsts; | |
1085 | int nr_free, nr_frags; | |
1086 | unsigned tx_done_idx, last_idx; | |
1087 | dma_addr_t buf; | |
1088 | unsigned len; | |
1089 | skb_frag_t *frag; | |
1090 | int stopped = 0; | |
1091 | int do_intr = 0; | |
c69fda4e | 1092 | volatile __le32 *first_desc; |
1da177e4 LT |
1093 | |
1094 | dprintk("ns83820_hard_start_xmit\n"); | |
1095 | ||
1096 | nr_frags = skb_shinfo(skb)->nr_frags; | |
1097 | again: | |
1098 | if (unlikely(dev->CFG_cache & CFG_LNKSTS)) { | |
1099 | netif_stop_queue(ndev); | |
1100 | if (unlikely(dev->CFG_cache & CFG_LNKSTS)) | |
1101 | return 1; | |
1102 | netif_start_queue(ndev); | |
1103 | } | |
1104 | ||
1105 | last_idx = free_idx = dev->tx_free_idx; | |
1106 | tx_done_idx = dev->tx_done_idx; | |
1107 | nr_free = (tx_done_idx + NR_TX_DESC-2 - free_idx) % NR_TX_DESC; | |
1108 | nr_free -= 1; | |
1109 | if (nr_free <= nr_frags) { | |
1110 | dprintk("stop_queue - not enough(%p)\n", ndev); | |
1111 | netif_stop_queue(ndev); | |
1112 | ||
1113 | /* Check again: we may have raced with a tx done irq */ | |
1114 | if (dev->tx_done_idx != tx_done_idx) { | |
1115 | dprintk("restart queue(%p)\n", ndev); | |
1116 | netif_start_queue(ndev); | |
1117 | goto again; | |
1118 | } | |
1119 | return 1; | |
1120 | } | |
1121 | ||
1122 | if (free_idx == dev->tx_intr_idx) { | |
1123 | do_intr = 1; | |
1124 | dev->tx_intr_idx = (dev->tx_intr_idx + NR_TX_DESC/4) % NR_TX_DESC; | |
1125 | } | |
1126 | ||
1127 | nr_free -= nr_frags; | |
1128 | if (nr_free < MIN_TX_DESC_FREE) { | |
1129 | dprintk("stop_queue - last entry(%p)\n", ndev); | |
1130 | netif_stop_queue(ndev); | |
1131 | stopped = 1; | |
1132 | } | |
1133 | ||
1134 | frag = skb_shinfo(skb)->frags; | |
1135 | if (!nr_frags) | |
1136 | frag = NULL; | |
1137 | extsts = 0; | |
84fa7933 | 1138 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
1da177e4 | 1139 | extsts |= EXTSTS_IPPKT; |
eddc9ec5 | 1140 | if (IPPROTO_TCP == ip_hdr(skb)->protocol) |
1da177e4 | 1141 | extsts |= EXTSTS_TCPPKT; |
eddc9ec5 | 1142 | else if (IPPROTO_UDP == ip_hdr(skb)->protocol) |
1da177e4 LT |
1143 | extsts |= EXTSTS_UDPPKT; |
1144 | } | |
1145 | ||
1146 | #ifdef NS83820_VLAN_ACCEL_SUPPORT | |
1147 | if(vlan_tx_tag_present(skb)) { | |
1148 | /* fetch the vlan tag info out of the | |
1149 | * ancilliary data if the vlan code | |
1150 | * is using hw vlan acceleration | |
1151 | */ | |
1152 | short tag = vlan_tx_tag_get(skb); | |
1153 | extsts |= (EXTSTS_VPKT | htons(tag)); | |
1154 | } | |
1155 | #endif | |
1156 | ||
1157 | len = skb->len; | |
1158 | if (nr_frags) | |
1159 | len -= skb->data_len; | |
1160 | buf = pci_map_single(dev->pci_dev, skb->data, len, PCI_DMA_TODEVICE); | |
1161 | ||
1162 | first_desc = dev->tx_descs + (free_idx * DESC_SIZE); | |
1163 | ||
1164 | for (;;) { | |
c69fda4e | 1165 | volatile __le32 *desc = dev->tx_descs + (free_idx * DESC_SIZE); |
1da177e4 LT |
1166 | |
1167 | dprintk("frag[%3u]: %4u @ 0x%08Lx\n", free_idx, len, | |
1168 | (unsigned long long)buf); | |
1169 | last_idx = free_idx; | |
1170 | free_idx = (free_idx + 1) % NR_TX_DESC; | |
1171 | desc[DESC_LINK] = cpu_to_le32(dev->tx_phy_descs + (free_idx * DESC_SIZE * 4)); | |
1172 | desc_addr_set(desc + DESC_BUFPTR, buf); | |
1173 | desc[DESC_EXTSTS] = cpu_to_le32(extsts); | |
1174 | ||
c16ef1ce | 1175 | cmdsts = ((nr_frags) ? CMDSTS_MORE : do_intr ? CMDSTS_INTR : 0); |
1da177e4 LT |
1176 | cmdsts |= (desc == first_desc) ? 0 : CMDSTS_OWN; |
1177 | cmdsts |= len; | |
1178 | desc[DESC_CMDSTS] = cpu_to_le32(cmdsts); | |
1179 | ||
1da177e4 LT |
1180 | if (!nr_frags) |
1181 | break; | |
1182 | ||
1183 | buf = pci_map_page(dev->pci_dev, frag->page, | |
1184 | frag->page_offset, | |
1185 | frag->size, PCI_DMA_TODEVICE); | |
1186 | dprintk("frag: buf=%08Lx page=%08lx offset=%08lx\n", | |
1187 | (long long)buf, (long) page_to_pfn(frag->page), | |
1188 | frag->page_offset); | |
1189 | len = frag->size; | |
1190 | frag++; | |
1191 | nr_frags--; | |
1192 | } | |
1193 | dprintk("done pkt\n"); | |
1194 | ||
1195 | spin_lock_irq(&dev->tx_lock); | |
1196 | dev->tx_skbs[last_idx] = skb; | |
1197 | first_desc[DESC_CMDSTS] |= cpu_to_le32(CMDSTS_OWN); | |
1198 | dev->tx_free_idx = free_idx; | |
1199 | atomic_inc(&dev->nr_tx_skbs); | |
1200 | spin_unlock_irq(&dev->tx_lock); | |
1201 | ||
1202 | kick_tx(dev); | |
1203 | ||
1204 | /* Check again: we may have raced with a tx done irq */ | |
1205 | if (stopped && (dev->tx_done_idx != tx_done_idx) && start_tx_okay(dev)) | |
1206 | netif_start_queue(ndev); | |
1207 | ||
1208 | /* set the transmit start time to catch transmit timeouts */ | |
1209 | ndev->trans_start = jiffies; | |
1210 | return 0; | |
1211 | } | |
1212 | ||
1213 | static void ns83820_update_stats(struct ns83820 *dev) | |
1214 | { | |
1215 | u8 __iomem *base = dev->base; | |
1216 | ||
1217 | /* the DP83820 will freeze counters, so we need to read all of them */ | |
1218 | dev->stats.rx_errors += readl(base + 0x60) & 0xffff; | |
1219 | dev->stats.rx_crc_errors += readl(base + 0x64) & 0xffff; | |
1220 | dev->stats.rx_missed_errors += readl(base + 0x68) & 0xffff; | |
1221 | dev->stats.rx_frame_errors += readl(base + 0x6c) & 0xffff; | |
1222 | /*dev->stats.rx_symbol_errors +=*/ readl(base + 0x70); | |
1223 | dev->stats.rx_length_errors += readl(base + 0x74) & 0xffff; | |
1224 | dev->stats.rx_length_errors += readl(base + 0x78) & 0xffff; | |
1225 | /*dev->stats.rx_badopcode_errors += */ readl(base + 0x7c); | |
1226 | /*dev->stats.rx_pause_count += */ readl(base + 0x80); | |
1227 | /*dev->stats.tx_pause_count += */ readl(base + 0x84); | |
1228 | dev->stats.tx_carrier_errors += readl(base + 0x88) & 0xff; | |
1229 | } | |
1230 | ||
1231 | static 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 | ||
1240 | return &dev->stats; | |
1241 | } | |
1242 | ||
10096974 JG |
1243 | /* Let ethtool retrieve info */ |
1244 | static 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; | |
1249 | int have_optical = 0; | |
1250 | int fullduplex = 0; | |
1251 | ||
1252 | /* | |
1253 | * Here's the list of available ethtool commands from other drivers: | |
1254 | * cmd->advertising = | |
1255 | * cmd->speed = | |
1256 | * cmd->duplex = | |
1257 | * cmd->port = 0; | |
1258 | * cmd->phy_address = | |
1259 | * cmd->transceiver = 0; | |
1260 | * cmd->autoneg = | |
1261 | * cmd->maxtxpkt = 0; | |
1262 | * cmd->maxrxpkt = 0; | |
1263 | */ | |
1264 | ||
1265 | /* read current configuration */ | |
1266 | cfg = readl(dev->base + CFG) ^ SPDSTS_POLARITY; | |
1267 | tanar = readl(dev->base + TANAR); | |
1268 | tbicr = readl(dev->base + TBICR); | |
1269 | ||
1270 | if (dev->CFG_cache & CFG_TBI_EN) { | |
1271 | /* we have an optical interface */ | |
1272 | have_optical = 1; | |
1273 | fullduplex = (cfg & CFG_DUPSTS) ? 1 : 0; | |
1274 | ||
1275 | } else { | |
1276 | /* We have copper */ | |
1277 | fullduplex = (cfg & CFG_DUPSTS) ? 1 : 0; | |
1278 | } | |
1279 | ||
1280 | cmd->supported = SUPPORTED_Autoneg; | |
1281 | ||
1282 | /* we have optical interface */ | |
1283 | if (dev->CFG_cache & CFG_TBI_EN) { | |
1284 | cmd->supported |= SUPPORTED_1000baseT_Half | | |
1285 | SUPPORTED_1000baseT_Full | | |
1286 | SUPPORTED_FIBRE; | |
1287 | cmd->port = PORT_FIBRE; | |
1288 | } /* TODO: else copper related support */ | |
1289 | ||
1290 | cmd->duplex = fullduplex ? DUPLEX_FULL : DUPLEX_HALF; | |
1291 | switch (cfg / CFG_SPDSTS0 & 3) { | |
1292 | case 2: | |
1293 | cmd->speed = SPEED_1000; | |
1294 | break; | |
1295 | case 1: | |
1296 | cmd->speed = SPEED_100; | |
1297 | break; | |
1298 | default: | |
1299 | cmd->speed = SPEED_10; | |
1300 | break; | |
1301 | } | |
1302 | cmd->autoneg = (tbicr & TBICR_MR_AN_ENABLE) ? 1: 0; | |
1303 | return 0; | |
1304 | } | |
1305 | ||
1306 | /* Let ethool change settings*/ | |
1307 | static 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 | ||
1da177e4 LT |
1386 | static 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 | ||
1394 | static 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 | ||
7282d491 | 1401 | static const struct ethtool_ops ops = { |
10096974 JG |
1402 | .get_settings = ns83820_get_settings, |
1403 | .set_settings = ns83820_set_settings, | |
1404 | .get_drvinfo = ns83820_get_drvinfo, | |
1405 | .get_link = ns83820_get_link | |
1da177e4 LT |
1406 | }; |
1407 | ||
3a10cceb | 1408 | /* this function is called in irq context from the ISR */ |
1da177e4 LT |
1409 | static void ns83820_mib_isr(struct ns83820 *dev) |
1410 | { | |
3a10cceb IM |
1411 | unsigned long flags; |
1412 | spin_lock_irqsave(&dev->misc_lock, flags); | |
1da177e4 | 1413 | ns83820_update_stats(dev); |
3a10cceb | 1414 | spin_unlock_irqrestore(&dev->misc_lock, flags); |
1da177e4 LT |
1415 | } |
1416 | ||
1417 | static void ns83820_do_isr(struct net_device *ndev, u32 isr); | |
7d12e780 | 1418 | static irqreturn_t ns83820_irq(int foo, void *data) |
1da177e4 LT |
1419 | { |
1420 | struct net_device *ndev = data; | |
1421 | struct ns83820 *dev = PRIV(ndev); | |
1422 | u32 isr; | |
1423 | dprintk("ns83820_irq(%p)\n", ndev); | |
1424 | ||
1425 | dev->ihr = 0; | |
1426 | ||
1427 | isr = readl(dev->base + ISR); | |
1428 | dprintk("irq: %08x\n", isr); | |
1429 | ns83820_do_isr(ndev, isr); | |
1430 | return IRQ_HANDLED; | |
1431 | } | |
1432 | ||
1433 | static void ns83820_do_isr(struct net_device *ndev, u32 isr) | |
1434 | { | |
1435 | struct ns83820 *dev = PRIV(ndev); | |
3a10cceb IM |
1436 | unsigned long flags; |
1437 | ||
1da177e4 LT |
1438 | #ifdef DEBUG |
1439 | if (isr & ~(ISR_PHY | ISR_RXDESC | ISR_RXEARLY | ISR_RXOK | ISR_RXERR | ISR_TXIDLE | ISR_TXOK | ISR_TXDESC)) | |
1440 | Dprintk("odd isr? 0x%08x\n", isr); | |
1441 | #endif | |
1442 | ||
1443 | if (ISR_RXIDLE & isr) { | |
1444 | dev->rx_info.idle = 1; | |
1445 | Dprintk("oh dear, we are idle\n"); | |
1446 | ns83820_rx_kick(ndev); | |
1447 | } | |
1448 | ||
1449 | if ((ISR_RXDESC | ISR_RXOK) & isr) { | |
1450 | prefetch(dev->rx_info.next_rx_desc); | |
1451 | ||
3a10cceb | 1452 | spin_lock_irqsave(&dev->misc_lock, flags); |
1da177e4 LT |
1453 | dev->IMR_cache &= ~(ISR_RXDESC | ISR_RXOK); |
1454 | writel(dev->IMR_cache, dev->base + IMR); | |
3a10cceb | 1455 | spin_unlock_irqrestore(&dev->misc_lock, flags); |
1da177e4 LT |
1456 | |
1457 | tasklet_schedule(&dev->rx_tasklet); | |
1458 | //rx_irq(ndev); | |
1459 | //writel(4, dev->base + IHR); | |
1460 | } | |
1461 | ||
1462 | if ((ISR_RXIDLE | ISR_RXORN | ISR_RXDESC | ISR_RXOK | ISR_RXERR) & isr) | |
1463 | ns83820_rx_kick(ndev); | |
1464 | ||
1465 | if (unlikely(ISR_RXSOVR & isr)) { | |
1466 | //printk("overrun: rxsovr\n"); | |
1467 | dev->stats.rx_fifo_errors ++; | |
1468 | } | |
1469 | ||
1470 | if (unlikely(ISR_RXORN & isr)) { | |
1471 | //printk("overrun: rxorn\n"); | |
1472 | dev->stats.rx_fifo_errors ++; | |
1473 | } | |
1474 | ||
1475 | if ((ISR_RXRCMP & isr) && dev->rx_info.up) | |
1476 | writel(CR_RXE, dev->base + CR); | |
1477 | ||
1478 | if (ISR_TXIDLE & isr) { | |
1479 | u32 txdp; | |
1480 | txdp = readl(dev->base + TXDP); | |
1481 | dprintk("txdp: %08x\n", txdp); | |
1482 | txdp -= dev->tx_phy_descs; | |
1483 | dev->tx_idx = txdp / (DESC_SIZE * 4); | |
1484 | if (dev->tx_idx >= NR_TX_DESC) { | |
1485 | printk(KERN_ALERT "%s: BUG -- txdp out of range\n", ndev->name); | |
1486 | dev->tx_idx = 0; | |
1487 | } | |
1488 | /* The may have been a race between a pci originated read | |
6aa20a22 JG |
1489 | * and the descriptor update from the cpu. Just in case, |
1490 | * kick the transmitter if the hardware thinks it is on a | |
1da177e4 LT |
1491 | * different descriptor than we are. |
1492 | */ | |
1493 | if (dev->tx_idx != dev->tx_free_idx) | |
1494 | kick_tx(dev); | |
1495 | } | |
1496 | ||
1497 | /* Defer tx ring processing until more than a minimum amount of | |
1498 | * work has accumulated | |
1499 | */ | |
1500 | if ((ISR_TXDESC | ISR_TXIDLE | ISR_TXOK | ISR_TXERR) & isr) { | |
3a10cceb | 1501 | spin_lock_irqsave(&dev->tx_lock, flags); |
1da177e4 | 1502 | do_tx_done(ndev); |
3a10cceb | 1503 | spin_unlock_irqrestore(&dev->tx_lock, flags); |
1da177e4 LT |
1504 | |
1505 | /* Disable TxOk if there are no outstanding tx packets. | |
1506 | */ | |
1507 | if ((dev->tx_done_idx == dev->tx_free_idx) && | |
1508 | (dev->IMR_cache & ISR_TXOK)) { | |
3a10cceb | 1509 | spin_lock_irqsave(&dev->misc_lock, flags); |
1da177e4 LT |
1510 | dev->IMR_cache &= ~ISR_TXOK; |
1511 | writel(dev->IMR_cache, dev->base + IMR); | |
3a10cceb | 1512 | spin_unlock_irqrestore(&dev->misc_lock, flags); |
1da177e4 LT |
1513 | } |
1514 | } | |
1515 | ||
1516 | /* The TxIdle interrupt can come in before the transmit has | |
1517 | * completed. Normally we reap packets off of the combination | |
6aa20a22 JG |
1518 | * of TxDesc and TxIdle and leave TxOk disabled (since it |
1519 | * occurs on every packet), but when no further irqs of this | |
1da177e4 LT |
1520 | * nature are expected, we must enable TxOk. |
1521 | */ | |
1522 | if ((ISR_TXIDLE & isr) && (dev->tx_done_idx != dev->tx_free_idx)) { | |
3a10cceb | 1523 | spin_lock_irqsave(&dev->misc_lock, flags); |
1da177e4 LT |
1524 | dev->IMR_cache |= ISR_TXOK; |
1525 | writel(dev->IMR_cache, dev->base + IMR); | |
3a10cceb | 1526 | spin_unlock_irqrestore(&dev->misc_lock, flags); |
1da177e4 LT |
1527 | } |
1528 | ||
1529 | /* MIB interrupt: one of the statistics counters is about to overflow */ | |
1530 | if (unlikely(ISR_MIB & isr)) | |
1531 | ns83820_mib_isr(dev); | |
1532 | ||
1533 | /* PHY: Link up/down/negotiation state change */ | |
1534 | if (unlikely(ISR_PHY & isr)) | |
1535 | phy_intr(ndev); | |
1536 | ||
1537 | #if 0 /* Still working on the interrupt mitigation strategy */ | |
1538 | if (dev->ihr) | |
1539 | writel(dev->ihr, dev->base + IHR); | |
1540 | #endif | |
1541 | } | |
1542 | ||
1543 | static void ns83820_do_reset(struct ns83820 *dev, u32 which) | |
1544 | { | |
1545 | Dprintk("resetting chip...\n"); | |
1546 | writel(which, dev->base + CR); | |
1547 | do { | |
1548 | schedule(); | |
1549 | } while (readl(dev->base + CR) & which); | |
1550 | Dprintk("okay!\n"); | |
1551 | } | |
1552 | ||
1553 | static int ns83820_stop(struct net_device *ndev) | |
1554 | { | |
1555 | struct ns83820 *dev = PRIV(ndev); | |
1556 | ||
1557 | /* FIXME: protect against interrupt handler? */ | |
1558 | del_timer_sync(&dev->tx_watchdog); | |
1559 | ||
1560 | /* disable interrupts */ | |
1561 | writel(0, dev->base + IMR); | |
1562 | writel(0, dev->base + IER); | |
1563 | readl(dev->base + IER); | |
1564 | ||
1565 | dev->rx_info.up = 0; | |
1566 | synchronize_irq(dev->pci_dev->irq); | |
1567 | ||
1568 | ns83820_do_reset(dev, CR_RST); | |
1569 | ||
1570 | synchronize_irq(dev->pci_dev->irq); | |
1571 | ||
1572 | spin_lock_irq(&dev->misc_lock); | |
1573 | dev->IMR_cache &= ~(ISR_TXURN | ISR_TXIDLE | ISR_TXERR | ISR_TXDESC | ISR_TXOK); | |
1574 | spin_unlock_irq(&dev->misc_lock); | |
1575 | ||
1576 | ns83820_cleanup_rx(dev); | |
1577 | ns83820_cleanup_tx(dev); | |
1578 | ||
1579 | return 0; | |
1580 | } | |
1581 | ||
1582 | static void ns83820_tx_timeout(struct net_device *ndev) | |
1583 | { | |
1584 | struct ns83820 *dev = PRIV(ndev); | |
c69fda4e AV |
1585 | u32 tx_done_idx; |
1586 | __le32 *desc; | |
1da177e4 LT |
1587 | unsigned long flags; |
1588 | ||
3a10cceb | 1589 | spin_lock_irqsave(&dev->tx_lock, flags); |
1da177e4 LT |
1590 | |
1591 | tx_done_idx = dev->tx_done_idx; | |
1592 | desc = dev->tx_descs + (tx_done_idx * DESC_SIZE); | |
1593 | ||
1594 | printk(KERN_INFO "%s: tx_timeout: tx_done_idx=%d free_idx=%d cmdsts=%08x\n", | |
1595 | ndev->name, | |
1596 | tx_done_idx, dev->tx_free_idx, le32_to_cpu(desc[DESC_CMDSTS])); | |
1597 | ||
1598 | #if defined(DEBUG) | |
1599 | { | |
1600 | u32 isr; | |
1601 | isr = readl(dev->base + ISR); | |
1602 | printk("irq: %08x imr: %08x\n", isr, dev->IMR_cache); | |
1603 | ns83820_do_isr(ndev, isr); | |
1604 | } | |
1605 | #endif | |
1606 | ||
1607 | do_tx_done(ndev); | |
1608 | ||
1609 | tx_done_idx = dev->tx_done_idx; | |
1610 | desc = dev->tx_descs + (tx_done_idx * DESC_SIZE); | |
1611 | ||
1612 | printk(KERN_INFO "%s: after: tx_done_idx=%d free_idx=%d cmdsts=%08x\n", | |
1613 | ndev->name, | |
1614 | tx_done_idx, dev->tx_free_idx, le32_to_cpu(desc[DESC_CMDSTS])); | |
1615 | ||
3a10cceb | 1616 | spin_unlock_irqrestore(&dev->tx_lock, flags); |
1da177e4 LT |
1617 | } |
1618 | ||
1619 | static void ns83820_tx_watch(unsigned long data) | |
1620 | { | |
1621 | struct net_device *ndev = (void *)data; | |
1622 | struct ns83820 *dev = PRIV(ndev); | |
1623 | ||
1624 | #if defined(DEBUG) | |
1625 | printk("ns83820_tx_watch: %u %u %d\n", | |
1626 | dev->tx_done_idx, dev->tx_free_idx, atomic_read(&dev->nr_tx_skbs) | |
1627 | ); | |
1628 | #endif | |
1629 | ||
1630 | if (time_after(jiffies, ndev->trans_start + 1*HZ) && | |
1631 | dev->tx_done_idx != dev->tx_free_idx) { | |
1632 | printk(KERN_DEBUG "%s: ns83820_tx_watch: %u %u %d\n", | |
1633 | ndev->name, | |
1634 | dev->tx_done_idx, dev->tx_free_idx, | |
1635 | atomic_read(&dev->nr_tx_skbs)); | |
1636 | ns83820_tx_timeout(ndev); | |
1637 | } | |
1638 | ||
1639 | mod_timer(&dev->tx_watchdog, jiffies + 2*HZ); | |
1640 | } | |
1641 | ||
1642 | static int ns83820_open(struct net_device *ndev) | |
1643 | { | |
1644 | struct ns83820 *dev = PRIV(ndev); | |
1645 | unsigned i; | |
1646 | u32 desc; | |
1647 | int ret; | |
1648 | ||
1649 | dprintk("ns83820_open\n"); | |
1650 | ||
1651 | writel(0, dev->base + PQCR); | |
1652 | ||
1653 | ret = ns83820_setup_rx(ndev); | |
1654 | if (ret) | |
1655 | goto failed; | |
1656 | ||
1657 | memset(dev->tx_descs, 0, 4 * NR_TX_DESC * DESC_SIZE); | |
1658 | for (i=0; i<NR_TX_DESC; i++) { | |
1659 | dev->tx_descs[(i * DESC_SIZE) + DESC_LINK] | |
1660 | = cpu_to_le32( | |
1661 | dev->tx_phy_descs | |
1662 | + ((i+1) % NR_TX_DESC) * DESC_SIZE * 4); | |
1663 | } | |
1664 | ||
1665 | dev->tx_idx = 0; | |
1666 | dev->tx_done_idx = 0; | |
1667 | desc = dev->tx_phy_descs; | |
1668 | writel(0, dev->base + TXDP_HI); | |
1669 | writel(desc, dev->base + TXDP); | |
1670 | ||
1671 | init_timer(&dev->tx_watchdog); | |
1672 | dev->tx_watchdog.data = (unsigned long)ndev; | |
1673 | dev->tx_watchdog.function = ns83820_tx_watch; | |
1674 | mod_timer(&dev->tx_watchdog, jiffies + 2*HZ); | |
1675 | ||
1676 | netif_start_queue(ndev); /* FIXME: wait for phy to come up */ | |
1677 | ||
1678 | return 0; | |
1679 | ||
1680 | failed: | |
1681 | ns83820_stop(ndev); | |
1682 | return ret; | |
1683 | } | |
1684 | ||
1685 | static void ns83820_getmac(struct ns83820 *dev, u8 *mac) | |
1686 | { | |
1687 | unsigned i; | |
1688 | for (i=0; i<3; i++) { | |
1689 | u32 data; | |
48888cc6 | 1690 | |
1da177e4 LT |
1691 | /* Read from the perfect match memory: this is loaded by |
1692 | * the chip from the EEPROM via the EELOAD self test. | |
1693 | */ | |
1694 | writel(i*2, dev->base + RFCR); | |
1695 | data = readl(dev->base + RFDR); | |
48888cc6 | 1696 | |
1da177e4 LT |
1697 | *mac++ = data; |
1698 | *mac++ = data >> 8; | |
1699 | } | |
1700 | } | |
1701 | ||
1702 | static int ns83820_change_mtu(struct net_device *ndev, int new_mtu) | |
1703 | { | |
1704 | if (new_mtu > RX_BUF_SIZE) | |
1705 | return -EINVAL; | |
1706 | ndev->mtu = new_mtu; | |
1707 | return 0; | |
1708 | } | |
1709 | ||
1710 | static void ns83820_set_multicast(struct net_device *ndev) | |
1711 | { | |
1712 | struct ns83820 *dev = PRIV(ndev); | |
1713 | u8 __iomem *rfcr = dev->base + RFCR; | |
1714 | u32 and_mask = 0xffffffff; | |
1715 | u32 or_mask = 0; | |
1716 | u32 val; | |
1717 | ||
1718 | if (ndev->flags & IFF_PROMISC) | |
1719 | or_mask |= RFCR_AAU | RFCR_AAM; | |
1720 | else | |
1721 | and_mask &= ~(RFCR_AAU | RFCR_AAM); | |
1722 | ||
e78af366 | 1723 | if (ndev->flags & IFF_ALLMULTI || ndev->mc_count) |
1da177e4 LT |
1724 | or_mask |= RFCR_AAM; |
1725 | else | |
1726 | and_mask &= ~RFCR_AAM; | |
1727 | ||
1728 | spin_lock_irq(&dev->misc_lock); | |
1729 | val = (readl(rfcr) & and_mask) | or_mask; | |
1730 | /* Ramit : RFCR Write Fix doc says RFEN must be 0 modify other bits */ | |
1731 | writel(val & ~RFCR_RFEN, rfcr); | |
1732 | writel(val, rfcr); | |
1733 | spin_unlock_irq(&dev->misc_lock); | |
1734 | } | |
1735 | ||
1736 | static void ns83820_run_bist(struct net_device *ndev, const char *name, u32 enable, u32 done, u32 fail) | |
1737 | { | |
1738 | struct ns83820 *dev = PRIV(ndev); | |
1739 | int timed_out = 0; | |
ff5688ae | 1740 | unsigned long start; |
1da177e4 LT |
1741 | u32 status; |
1742 | int loops = 0; | |
1743 | ||
1744 | dprintk("%s: start %s\n", ndev->name, name); | |
1745 | ||
1746 | start = jiffies; | |
1747 | ||
1748 | writel(enable, dev->base + PTSCR); | |
1749 | for (;;) { | |
1750 | loops++; | |
1751 | status = readl(dev->base + PTSCR); | |
1752 | if (!(status & enable)) | |
1753 | break; | |
1754 | if (status & done) | |
1755 | break; | |
1756 | if (status & fail) | |
1757 | break; | |
ff5688ae | 1758 | if (time_after_eq(jiffies, start + HZ)) { |
1da177e4 LT |
1759 | timed_out = 1; |
1760 | break; | |
1761 | } | |
3173c890 | 1762 | schedule_timeout_uninterruptible(1); |
1da177e4 LT |
1763 | } |
1764 | ||
1765 | if (status & fail) | |
1766 | printk(KERN_INFO "%s: %s failed! (0x%08x & 0x%08x)\n", | |
1767 | ndev->name, name, status, fail); | |
1768 | else if (timed_out) | |
1769 | printk(KERN_INFO "%s: run_bist %s timed out! (%08x)\n", | |
1770 | ndev->name, name, status); | |
1771 | ||
1772 | dprintk("%s: done %s in %d loops\n", ndev->name, name, loops); | |
1773 | } | |
1774 | ||
1775 | #ifdef PHY_CODE_IS_FINISHED | |
1776 | static void ns83820_mii_write_bit(struct ns83820 *dev, int bit) | |
1777 | { | |
1778 | /* drive MDC low */ | |
1779 | dev->MEAR_cache &= ~MEAR_MDC; | |
1780 | writel(dev->MEAR_cache, dev->base + MEAR); | |
1781 | readl(dev->base + MEAR); | |
1782 | ||
1783 | /* enable output, set bit */ | |
1784 | dev->MEAR_cache |= MEAR_MDDIR; | |
1785 | if (bit) | |
1786 | dev->MEAR_cache |= MEAR_MDIO; | |
1787 | else | |
1788 | dev->MEAR_cache &= ~MEAR_MDIO; | |
1789 | ||
1790 | /* set the output bit */ | |
1791 | writel(dev->MEAR_cache, dev->base + MEAR); | |
1792 | readl(dev->base + MEAR); | |
1793 | ||
1794 | /* Wait. Max clock rate is 2.5MHz, this way we come in under 1MHz */ | |
1795 | udelay(1); | |
1796 | ||
1797 | /* drive MDC high causing the data bit to be latched */ | |
1798 | dev->MEAR_cache |= MEAR_MDC; | |
1799 | writel(dev->MEAR_cache, dev->base + MEAR); | |
1800 | readl(dev->base + MEAR); | |
1801 | ||
1802 | /* Wait again... */ | |
1803 | udelay(1); | |
1804 | } | |
1805 | ||
1806 | static int ns83820_mii_read_bit(struct ns83820 *dev) | |
1807 | { | |
1808 | int bit; | |
1809 | ||
1810 | /* drive MDC low, disable output */ | |
1811 | dev->MEAR_cache &= ~MEAR_MDC; | |
1812 | dev->MEAR_cache &= ~MEAR_MDDIR; | |
1813 | writel(dev->MEAR_cache, dev->base + MEAR); | |
1814 | readl(dev->base + MEAR); | |
1815 | ||
1816 | /* Wait. Max clock rate is 2.5MHz, this way we come in under 1MHz */ | |
1817 | udelay(1); | |
1818 | ||
1819 | /* drive MDC high causing the data bit to be latched */ | |
1820 | bit = (readl(dev->base + MEAR) & MEAR_MDIO) ? 1 : 0; | |
1821 | dev->MEAR_cache |= MEAR_MDC; | |
1822 | writel(dev->MEAR_cache, dev->base + MEAR); | |
1823 | ||
1824 | /* Wait again... */ | |
1825 | udelay(1); | |
1826 | ||
1827 | return bit; | |
1828 | } | |
1829 | ||
1830 | static unsigned ns83820_mii_read_reg(struct ns83820 *dev, unsigned phy, unsigned reg) | |
1831 | { | |
1832 | unsigned data = 0; | |
1833 | int i; | |
1834 | ||
1835 | /* read some garbage so that we eventually sync up */ | |
1836 | for (i=0; i<64; i++) | |
1837 | ns83820_mii_read_bit(dev); | |
1838 | ||
1839 | ns83820_mii_write_bit(dev, 0); /* start */ | |
1840 | ns83820_mii_write_bit(dev, 1); | |
1841 | ns83820_mii_write_bit(dev, 1); /* opcode read */ | |
1842 | ns83820_mii_write_bit(dev, 0); | |
1843 | ||
1844 | /* write out the phy address: 5 bits, msb first */ | |
1845 | for (i=0; i<5; i++) | |
1846 | ns83820_mii_write_bit(dev, phy & (0x10 >> i)); | |
1847 | ||
1848 | /* write out the register address, 5 bits, msb first */ | |
1849 | for (i=0; i<5; i++) | |
1850 | ns83820_mii_write_bit(dev, reg & (0x10 >> i)); | |
1851 | ||
1852 | ns83820_mii_read_bit(dev); /* turn around cycles */ | |
1853 | ns83820_mii_read_bit(dev); | |
1854 | ||
1855 | /* read in the register data, 16 bits msb first */ | |
1856 | for (i=0; i<16; i++) { | |
1857 | data <<= 1; | |
1858 | data |= ns83820_mii_read_bit(dev); | |
1859 | } | |
1860 | ||
1861 | return data; | |
1862 | } | |
1863 | ||
1864 | static unsigned ns83820_mii_write_reg(struct ns83820 *dev, unsigned phy, unsigned reg, unsigned data) | |
1865 | { | |
1866 | int i; | |
1867 | ||
1868 | /* read some garbage so that we eventually sync up */ | |
1869 | for (i=0; i<64; i++) | |
1870 | ns83820_mii_read_bit(dev); | |
1871 | ||
1872 | ns83820_mii_write_bit(dev, 0); /* start */ | |
1873 | ns83820_mii_write_bit(dev, 1); | |
1874 | ns83820_mii_write_bit(dev, 0); /* opcode read */ | |
1875 | ns83820_mii_write_bit(dev, 1); | |
1876 | ||
1877 | /* write out the phy address: 5 bits, msb first */ | |
1878 | for (i=0; i<5; i++) | |
1879 | ns83820_mii_write_bit(dev, phy & (0x10 >> i)); | |
1880 | ||
1881 | /* write out the register address, 5 bits, msb first */ | |
1882 | for (i=0; i<5; i++) | |
1883 | ns83820_mii_write_bit(dev, reg & (0x10 >> i)); | |
1884 | ||
1885 | ns83820_mii_read_bit(dev); /* turn around cycles */ | |
1886 | ns83820_mii_read_bit(dev); | |
1887 | ||
1888 | /* read in the register data, 16 bits msb first */ | |
1889 | for (i=0; i<16; i++) | |
1890 | ns83820_mii_write_bit(dev, (data >> (15 - i)) & 1); | |
1891 | ||
1892 | return data; | |
1893 | } | |
1894 | ||
1895 | static void ns83820_probe_phy(struct net_device *ndev) | |
1896 | { | |
1897 | struct ns83820 *dev = PRIV(ndev); | |
1898 | static int first; | |
1899 | int i; | |
1900 | #define MII_PHYIDR1 0x02 | |
1901 | #define MII_PHYIDR2 0x03 | |
1902 | ||
1903 | #if 0 | |
1904 | if (!first) { | |
1905 | unsigned tmp; | |
1906 | ns83820_mii_read_reg(dev, 1, 0x09); | |
1907 | ns83820_mii_write_reg(dev, 1, 0x10, 0x0d3e); | |
1908 | ||
1909 | tmp = ns83820_mii_read_reg(dev, 1, 0x00); | |
1910 | ns83820_mii_write_reg(dev, 1, 0x00, tmp | 0x8000); | |
1911 | udelay(1300); | |
1912 | ns83820_mii_read_reg(dev, 1, 0x09); | |
1913 | } | |
1914 | #endif | |
1915 | first = 1; | |
1916 | ||
1917 | for (i=1; i<2; i++) { | |
1918 | int j; | |
1919 | unsigned a, b; | |
1920 | a = ns83820_mii_read_reg(dev, i, MII_PHYIDR1); | |
1921 | b = ns83820_mii_read_reg(dev, i, MII_PHYIDR2); | |
1922 | ||
1923 | //printk("%s: phy %d: 0x%04x 0x%04x\n", | |
1924 | // ndev->name, i, a, b); | |
1925 | ||
1926 | for (j=0; j<0x16; j+=4) { | |
1927 | dprintk("%s: [0x%02x] %04x %04x %04x %04x\n", | |
1928 | ndev->name, j, | |
1929 | ns83820_mii_read_reg(dev, i, 0 + j), | |
1930 | ns83820_mii_read_reg(dev, i, 1 + j), | |
1931 | ns83820_mii_read_reg(dev, i, 2 + j), | |
1932 | ns83820_mii_read_reg(dev, i, 3 + j) | |
1933 | ); | |
1934 | } | |
1935 | } | |
1936 | { | |
1937 | unsigned a, b; | |
1938 | /* read firmware version: memory addr is 0x8402 and 0x8403 */ | |
1939 | ns83820_mii_write_reg(dev, 1, 0x16, 0x000d); | |
1940 | ns83820_mii_write_reg(dev, 1, 0x1e, 0x810e); | |
1941 | a = ns83820_mii_read_reg(dev, 1, 0x1d); | |
1942 | ||
1943 | ns83820_mii_write_reg(dev, 1, 0x16, 0x000d); | |
1944 | ns83820_mii_write_reg(dev, 1, 0x1e, 0x810e); | |
1945 | b = ns83820_mii_read_reg(dev, 1, 0x1d); | |
1946 | dprintk("version: 0x%04x 0x%04x\n", a, b); | |
1947 | } | |
1948 | } | |
1949 | #endif | |
1950 | ||
1951 | static int __devinit ns83820_init_one(struct pci_dev *pci_dev, const struct pci_device_id *id) | |
1952 | { | |
1953 | struct net_device *ndev; | |
1954 | struct ns83820 *dev; | |
1955 | long addr; | |
1956 | int err; | |
1957 | int using_dac = 0; | |
0795af57 | 1958 | DECLARE_MAC_BUF(mac); |
1da177e4 LT |
1959 | |
1960 | /* See if we can set the dma mask early on; failure is fatal. */ | |
910638ae MG |
1961 | if (sizeof(dma_addr_t) == 8 && |
1962 | !pci_set_dma_mask(pci_dev, DMA_64BIT_MASK)) { | |
1da177e4 | 1963 | using_dac = 1; |
910638ae | 1964 | } else if (!pci_set_dma_mask(pci_dev, DMA_32BIT_MASK)) { |
1da177e4 LT |
1965 | using_dac = 0; |
1966 | } else { | |
9b91cf9d | 1967 | dev_warn(&pci_dev->dev, "pci_set_dma_mask failed!\n"); |
1da177e4 LT |
1968 | return -ENODEV; |
1969 | } | |
1970 | ||
1971 | ndev = alloc_etherdev(sizeof(struct ns83820)); | |
1972 | dev = PRIV(ndev); | |
d14e37e1 | 1973 | |
1da177e4 LT |
1974 | err = -ENOMEM; |
1975 | if (!dev) | |
1976 | goto out; | |
1977 | ||
d14e37e1 AB |
1978 | dev->ndev = ndev; |
1979 | ||
1da177e4 LT |
1980 | spin_lock_init(&dev->rx_info.lock); |
1981 | spin_lock_init(&dev->tx_lock); | |
1982 | spin_lock_init(&dev->misc_lock); | |
1983 | dev->pci_dev = pci_dev; | |
1984 | ||
1da177e4 LT |
1985 | SET_NETDEV_DEV(ndev, &pci_dev->dev); |
1986 | ||
c4028958 | 1987 | INIT_WORK(&dev->tq_refill, queue_refill); |
1da177e4 LT |
1988 | tasklet_init(&dev->rx_tasklet, rx_action, (unsigned long)ndev); |
1989 | ||
1990 | err = pci_enable_device(pci_dev); | |
1991 | if (err) { | |
9b91cf9d | 1992 | dev_info(&pci_dev->dev, "pci_enable_dev failed: %d\n", err); |
1da177e4 LT |
1993 | goto out_free; |
1994 | } | |
1995 | ||
1996 | pci_set_master(pci_dev); | |
1997 | addr = pci_resource_start(pci_dev, 1); | |
1998 | dev->base = ioremap_nocache(addr, PAGE_SIZE); | |
1999 | dev->tx_descs = pci_alloc_consistent(pci_dev, | |
2000 | 4 * DESC_SIZE * NR_TX_DESC, &dev->tx_phy_descs); | |
2001 | dev->rx_info.descs = pci_alloc_consistent(pci_dev, | |
2002 | 4 * DESC_SIZE * NR_RX_DESC, &dev->rx_info.phy_descs); | |
2003 | err = -ENOMEM; | |
2004 | if (!dev->base || !dev->tx_descs || !dev->rx_info.descs) | |
2005 | goto out_disable; | |
2006 | ||
2007 | dprintk("%p: %08lx %p: %08lx\n", | |
2008 | dev->tx_descs, (long)dev->tx_phy_descs, | |
2009 | dev->rx_info.descs, (long)dev->rx_info.phy_descs); | |
2010 | ||
2011 | /* disable interrupts */ | |
2012 | writel(0, dev->base + IMR); | |
2013 | writel(0, dev->base + IER); | |
2014 | readl(dev->base + IER); | |
2015 | ||
2016 | dev->IMR_cache = 0; | |
2017 | ||
1fb9df5d | 2018 | err = request_irq(pci_dev->irq, ns83820_irq, IRQF_SHARED, |
1da177e4 LT |
2019 | DRV_NAME, ndev); |
2020 | if (err) { | |
9b91cf9d | 2021 | dev_info(&pci_dev->dev, "unable to register irq %d, err %d\n", |
2e8a538d | 2022 | pci_dev->irq, err); |
1da177e4 LT |
2023 | goto out_disable; |
2024 | } | |
2025 | ||
2026 | /* | |
2027 | * FIXME: we are holding rtnl_lock() over obscenely long area only | |
2028 | * because some of the setup code uses dev->name. It's Wrong(tm) - | |
2029 | * we should be using driver-specific names for all that stuff. | |
2030 | * For now that will do, but we really need to come back and kill | |
2031 | * most of the dev_alloc_name() users later. | |
2032 | */ | |
2033 | rtnl_lock(); | |
2034 | err = dev_alloc_name(ndev, ndev->name); | |
2035 | if (err < 0) { | |
9b91cf9d | 2036 | dev_info(&pci_dev->dev, "unable to get netdev name: %d\n", err); |
1da177e4 LT |
2037 | goto out_free_irq; |
2038 | } | |
2039 | ||
2040 | printk("%s: ns83820.c: 0x22c: %08x, subsystem: %04x:%04x\n", | |
2041 | ndev->name, le32_to_cpu(readl(dev->base + 0x22c)), | |
2042 | pci_dev->subsystem_vendor, pci_dev->subsystem_device); | |
2043 | ||
2044 | ndev->open = ns83820_open; | |
2045 | ndev->stop = ns83820_stop; | |
2046 | ndev->hard_start_xmit = ns83820_hard_start_xmit; | |
2047 | ndev->get_stats = ns83820_get_stats; | |
2048 | ndev->change_mtu = ns83820_change_mtu; | |
2049 | ndev->set_multicast_list = ns83820_set_multicast; | |
2050 | SET_ETHTOOL_OPS(ndev, &ops); | |
2051 | ndev->tx_timeout = ns83820_tx_timeout; | |
2052 | ndev->watchdog_timeo = 5 * HZ; | |
2053 | pci_set_drvdata(pci_dev, ndev); | |
2054 | ||
2055 | ns83820_do_reset(dev, CR_RST); | |
2056 | ||
2057 | /* Must reset the ram bist before running it */ | |
2058 | writel(PTSCR_RBIST_RST, dev->base + PTSCR); | |
2059 | ns83820_run_bist(ndev, "sram bist", PTSCR_RBIST_EN, | |
2060 | PTSCR_RBIST_DONE, PTSCR_RBIST_FAIL); | |
2061 | ns83820_run_bist(ndev, "eeprom bist", PTSCR_EEBIST_EN, 0, | |
2062 | PTSCR_EEBIST_FAIL); | |
2063 | ns83820_run_bist(ndev, "eeprom load", PTSCR_EELOAD_EN, 0, 0); | |
2064 | ||
2065 | /* I love config registers */ | |
2066 | dev->CFG_cache = readl(dev->base + CFG); | |
2067 | ||
2068 | if ((dev->CFG_cache & CFG_PCI64_DET)) { | |
2069 | printk(KERN_INFO "%s: detected 64 bit PCI data bus.\n", | |
2070 | ndev->name); | |
2071 | /*dev->CFG_cache |= CFG_DATA64_EN;*/ | |
2072 | if (!(dev->CFG_cache & CFG_DATA64_EN)) | |
2073 | printk(KERN_INFO "%s: EEPROM did not enable 64 bit bus. Disabled.\n", | |
2074 | ndev->name); | |
2075 | } else | |
2076 | dev->CFG_cache &= ~(CFG_DATA64_EN); | |
2077 | ||
2078 | dev->CFG_cache &= (CFG_TBI_EN | CFG_MRM_DIS | CFG_MWI_DIS | | |
2079 | CFG_T64ADDR | CFG_DATA64_EN | CFG_EXT_125 | | |
2080 | CFG_M64ADDR); | |
2081 | dev->CFG_cache |= CFG_PINT_DUPSTS | CFG_PINT_LNKSTS | CFG_PINT_SPDSTS | | |
2082 | CFG_EXTSTS_EN | CFG_EXD | CFG_PESEL; | |
2083 | dev->CFG_cache |= CFG_REQALG; | |
2084 | dev->CFG_cache |= CFG_POW; | |
2085 | dev->CFG_cache |= CFG_TMRTEST; | |
2086 | ||
2087 | /* When compiled with 64 bit addressing, we must always enable | |
2088 | * the 64 bit descriptor format. | |
2089 | */ | |
6aa20a22 | 2090 | if (sizeof(dma_addr_t) == 8) |
c16ef1ce | 2091 | dev->CFG_cache |= CFG_M64ADDR; |
1da177e4 LT |
2092 | if (using_dac) |
2093 | dev->CFG_cache |= CFG_T64ADDR; | |
2094 | ||
2095 | /* Big endian mode does not seem to do what the docs suggest */ | |
2096 | dev->CFG_cache &= ~CFG_BEM; | |
2097 | ||
2098 | /* setup optical transceiver if we have one */ | |
2099 | if (dev->CFG_cache & CFG_TBI_EN) { | |
2100 | printk(KERN_INFO "%s: enabling optical transceiver\n", | |
2101 | ndev->name); | |
2102 | writel(readl(dev->base + GPIOR) | 0x3e8, dev->base + GPIOR); | |
2103 | ||
2104 | /* setup auto negotiation feature advertisement */ | |
2105 | writel(readl(dev->base + TANAR) | |
2106 | | TANAR_HALF_DUP | TANAR_FULL_DUP, | |
2107 | dev->base + TANAR); | |
2108 | ||
2109 | /* start auto negotiation */ | |
2110 | writel(TBICR_MR_AN_ENABLE | TBICR_MR_RESTART_AN, | |
2111 | dev->base + TBICR); | |
2112 | writel(TBICR_MR_AN_ENABLE, dev->base + TBICR); | |
2113 | dev->linkstate = LINK_AUTONEGOTIATE; | |
2114 | ||
2115 | dev->CFG_cache |= CFG_MODE_1000; | |
2116 | } | |
2117 | ||
2118 | writel(dev->CFG_cache, dev->base + CFG); | |
2119 | dprintk("CFG: %08x\n", dev->CFG_cache); | |
2120 | ||
2121 | if (reset_phy) { | |
2122 | printk(KERN_INFO "%s: resetting phy\n", ndev->name); | |
2123 | writel(dev->CFG_cache | CFG_PHY_RST, dev->base + CFG); | |
2124 | msleep(10); | |
2125 | writel(dev->CFG_cache, dev->base + CFG); | |
2126 | } | |
2127 | ||
6aa20a22 | 2128 | #if 0 /* Huh? This sets the PCI latency register. Should be done via |
1da177e4 LT |
2129 | * the PCI layer. FIXME. |
2130 | */ | |
2131 | if (readl(dev->base + SRR)) | |
2132 | writel(readl(dev->base+0x20c) | 0xfe00, dev->base + 0x20c); | |
2133 | #endif | |
2134 | ||
2135 | /* Note! The DMA burst size interacts with packet | |
2136 | * transmission, such that the largest packet that | |
2137 | * can be transmitted is 8192 - FLTH - burst size. | |
2138 | * If only the transmit fifo was larger... | |
2139 | */ | |
6aa20a22 | 2140 | /* Ramit : 1024 DMA is not a good idea, it ends up banging |
1da177e4 LT |
2141 | * some DELL and COMPAQ SMP systems */ |
2142 | writel(TXCFG_CSI | TXCFG_HBI | TXCFG_ATP | TXCFG_MXDMA512 | |
2143 | | ((1600 / 32) * 0x100), | |
2144 | dev->base + TXCFG); | |
2145 | ||
2146 | /* Flush the interrupt holdoff timer */ | |
2147 | writel(0x000, dev->base + IHR); | |
2148 | writel(0x100, dev->base + IHR); | |
2149 | writel(0x000, dev->base + IHR); | |
2150 | ||
2151 | /* Set Rx to full duplex, don't accept runt, errored, long or length | |
2152 | * range errored packets. Use 512 byte DMA. | |
2153 | */ | |
6aa20a22 JG |
2154 | /* Ramit : 1024 DMA is not a good idea, it ends up banging |
2155 | * some DELL and COMPAQ SMP systems | |
1da177e4 LT |
2156 | * Turn on ALP, only we are accpeting Jumbo Packets */ |
2157 | writel(RXCFG_AEP | RXCFG_ARP | RXCFG_AIRL | RXCFG_RX_FD | |
2158 | | RXCFG_STRIPCRC | |
2159 | //| RXCFG_ALP | |
2160 | | (RXCFG_MXDMA512) | 0, dev->base + RXCFG); | |
2161 | ||
2162 | /* Disable priority queueing */ | |
2163 | writel(0, dev->base + PQCR); | |
2164 | ||
2165 | /* Enable IP checksum validation and detetion of VLAN headers. | |
2166 | * Note: do not set the reject options as at least the 0x102 | |
2167 | * revision of the chip does not properly accept IP fragments | |
2168 | * at least for UDP. | |
2169 | */ | |
2170 | /* Ramit : Be sure to turn on RXCFG_ARP if VLAN's are enabled, since | |
2171 | * the MAC it calculates the packetsize AFTER stripping the VLAN | |
2172 | * header, and if a VLAN Tagged packet of 64 bytes is received (like | |
2173 | * a ping with a VLAN header) then the card, strips the 4 byte VLAN | |
2174 | * tag and then checks the packet size, so if RXCFG_ARP is not enabled, | |
2175 | * it discrards it!. These guys...... | |
2176 | * also turn on tag stripping if hardware acceleration is enabled | |
2177 | */ | |
2178 | #ifdef NS83820_VLAN_ACCEL_SUPPORT | |
6aa20a22 | 2179 | #define VRCR_INIT_VALUE (VRCR_IPEN|VRCR_VTDEN|VRCR_VTREN) |
1da177e4 LT |
2180 | #else |
2181 | #define VRCR_INIT_VALUE (VRCR_IPEN|VRCR_VTDEN) | |
2182 | #endif | |
2183 | writel(VRCR_INIT_VALUE, dev->base + VRCR); | |
2184 | ||
2185 | /* Enable per-packet TCP/UDP/IP checksumming | |
2186 | * and per packet vlan tag insertion if | |
2187 | * vlan hardware acceleration is enabled | |
2188 | */ | |
2189 | #ifdef NS83820_VLAN_ACCEL_SUPPORT | |
2190 | #define VTCR_INIT_VALUE (VTCR_PPCHK|VTCR_VPPTI) | |
2191 | #else | |
2192 | #define VTCR_INIT_VALUE VTCR_PPCHK | |
2193 | #endif | |
2194 | writel(VTCR_INIT_VALUE, dev->base + VTCR); | |
2195 | ||
2196 | /* Ramit : Enable async and sync pause frames */ | |
2197 | /* writel(0, dev->base + PCR); */ | |
2198 | writel((PCR_PS_MCAST | PCR_PS_DA | PCR_PSEN | PCR_FFLO_4K | | |
2199 | PCR_FFHI_8K | PCR_STLO_4 | PCR_STHI_8 | PCR_PAUSE_CNT), | |
2200 | dev->base + PCR); | |
2201 | ||
2202 | /* Disable Wake On Lan */ | |
2203 | writel(0, dev->base + WCSR); | |
2204 | ||
2205 | ns83820_getmac(dev, ndev->dev_addr); | |
2206 | ||
2207 | /* Yes, we support dumb IP checksum on transmit */ | |
2208 | ndev->features |= NETIF_F_SG; | |
2209 | ndev->features |= NETIF_F_IP_CSUM; | |
2210 | ||
2211 | #ifdef NS83820_VLAN_ACCEL_SUPPORT | |
2212 | /* We also support hardware vlan acceleration */ | |
2213 | ndev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; | |
2214 | ndev->vlan_rx_register = ns83820_vlan_rx_register; | |
1da177e4 LT |
2215 | #endif |
2216 | ||
2217 | if (using_dac) { | |
2218 | printk(KERN_INFO "%s: using 64 bit addressing.\n", | |
2219 | ndev->name); | |
2220 | ndev->features |= NETIF_F_HIGHDMA; | |
2221 | } | |
2222 | ||
0795af57 | 2223 | printk(KERN_INFO "%s: ns83820 v" VERSION ": DP83820 v%u.%u: %s io=0x%08lx irq=%d f=%s\n", |
1da177e4 LT |
2224 | ndev->name, |
2225 | (unsigned)readl(dev->base + SRR) >> 8, | |
2226 | (unsigned)readl(dev->base + SRR) & 0xff, | |
0795af57 | 2227 | print_mac(mac, ndev->dev_addr), |
1da177e4 LT |
2228 | addr, pci_dev->irq, |
2229 | (ndev->features & NETIF_F_HIGHDMA) ? "h,sg" : "sg" | |
2230 | ); | |
2231 | ||
2232 | #ifdef PHY_CODE_IS_FINISHED | |
2233 | ns83820_probe_phy(ndev); | |
2234 | #endif | |
2235 | ||
2236 | err = register_netdevice(ndev); | |
2237 | if (err) { | |
2238 | printk(KERN_INFO "ns83820: unable to register netdev: %d\n", err); | |
2239 | goto out_cleanup; | |
2240 | } | |
2241 | rtnl_unlock(); | |
2242 | ||
2243 | return 0; | |
2244 | ||
2245 | out_cleanup: | |
2246 | writel(0, dev->base + IMR); /* paranoia */ | |
2247 | writel(0, dev->base + IER); | |
2248 | readl(dev->base + IER); | |
2249 | out_free_irq: | |
2250 | rtnl_unlock(); | |
2251 | free_irq(pci_dev->irq, ndev); | |
2252 | out_disable: | |
2253 | if (dev->base) | |
2254 | iounmap(dev->base); | |
2255 | pci_free_consistent(pci_dev, 4 * DESC_SIZE * NR_TX_DESC, dev->tx_descs, dev->tx_phy_descs); | |
2256 | pci_free_consistent(pci_dev, 4 * DESC_SIZE * NR_RX_DESC, dev->rx_info.descs, dev->rx_info.phy_descs); | |
2257 | pci_disable_device(pci_dev); | |
2258 | out_free: | |
2259 | free_netdev(ndev); | |
2260 | pci_set_drvdata(pci_dev, NULL); | |
2261 | out: | |
2262 | return err; | |
2263 | } | |
2264 | ||
2265 | static void __devexit ns83820_remove_one(struct pci_dev *pci_dev) | |
2266 | { | |
2267 | struct net_device *ndev = pci_get_drvdata(pci_dev); | |
2268 | struct ns83820 *dev = PRIV(ndev); /* ok even if NULL */ | |
2269 | ||
2270 | if (!ndev) /* paranoia */ | |
2271 | return; | |
2272 | ||
2273 | writel(0, dev->base + IMR); /* paranoia */ | |
2274 | writel(0, dev->base + IER); | |
2275 | readl(dev->base + IER); | |
2276 | ||
2277 | unregister_netdev(ndev); | |
2278 | free_irq(dev->pci_dev->irq, ndev); | |
2279 | iounmap(dev->base); | |
2280 | pci_free_consistent(dev->pci_dev, 4 * DESC_SIZE * NR_TX_DESC, | |
2281 | dev->tx_descs, dev->tx_phy_descs); | |
2282 | pci_free_consistent(dev->pci_dev, 4 * DESC_SIZE * NR_RX_DESC, | |
2283 | dev->rx_info.descs, dev->rx_info.phy_descs); | |
2284 | pci_disable_device(dev->pci_dev); | |
2285 | free_netdev(ndev); | |
2286 | pci_set_drvdata(pci_dev, NULL); | |
2287 | } | |
2288 | ||
2289 | static struct pci_device_id ns83820_pci_tbl[] = { | |
2290 | { 0x100b, 0x0022, PCI_ANY_ID, PCI_ANY_ID, 0, .driver_data = 0, }, | |
2291 | { 0, }, | |
2292 | }; | |
2293 | ||
2294 | static struct pci_driver driver = { | |
2295 | .name = "ns83820", | |
2296 | .id_table = ns83820_pci_tbl, | |
2297 | .probe = ns83820_init_one, | |
2298 | .remove = __devexit_p(ns83820_remove_one), | |
2299 | #if 0 /* FIXME: implement */ | |
2300 | .suspend = , | |
2301 | .resume = , | |
2302 | #endif | |
2303 | }; | |
2304 | ||
2305 | ||
2306 | static int __init ns83820_init(void) | |
2307 | { | |
2308 | printk(KERN_INFO "ns83820.c: National Semiconductor DP83820 10/100/1000 driver.\n"); | |
29917620 | 2309 | return pci_register_driver(&driver); |
1da177e4 LT |
2310 | } |
2311 | ||
2312 | static void __exit ns83820_exit(void) | |
2313 | { | |
2314 | pci_unregister_driver(&driver); | |
2315 | } | |
2316 | ||
2317 | MODULE_AUTHOR("Benjamin LaHaise <bcrl@kvack.org>"); | |
2318 | MODULE_DESCRIPTION("National Semiconductor DP83820 10/100/1000 driver"); | |
2319 | MODULE_LICENSE("GPL"); | |
2320 | ||
2321 | MODULE_DEVICE_TABLE(pci, ns83820_pci_tbl); | |
2322 | ||
2323 | module_param(lnksts, int, 0); | |
2324 | MODULE_PARM_DESC(lnksts, "Polarity of LNKSTS bit"); | |
2325 | ||
2326 | module_param(ihr, int, 0); | |
2327 | MODULE_PARM_DESC(ihr, "Time in 100 us increments to delay interrupts (range 0-127)"); | |
2328 | ||
2329 | module_param(reset_phy, int, 0); | |
2330 | MODULE_PARM_DESC(reset_phy, "Set to 1 to reset the PHY on startup"); | |
2331 | ||
2332 | module_init(ns83820_init); | |
2333 | module_exit(ns83820_exit); |