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1da177e4 LT |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Driver for SGI's IOC3 based Ethernet cards as found in the PCI card. | |
7 | * | |
bbfb86c5 | 8 | * Copyright (C) 1999, 2000, 01, 03, 06 Ralf Baechle |
1da177e4 LT |
9 | * Copyright (C) 1995, 1999, 2000, 2001 by Silicon Graphics, Inc. |
10 | * | |
11 | * References: | |
12 | * o IOC3 ASIC specification 4.51, 1996-04-18 | |
13 | * o IEEE 802.3 specification, 2000 edition | |
14 | * o DP38840A Specification, National Semiconductor, March 1997 | |
15 | * | |
16 | * To do: | |
17 | * | |
18 | * o Handle allocation failures in ioc3_alloc_skb() more gracefully. | |
19 | * o Handle allocation failures in ioc3_init_rings(). | |
20 | * o Use prefetching for large packets. What is a good lower limit for | |
21 | * prefetching? | |
22 | * o We're probably allocating a bit too much memory. | |
23 | * o Use hardware checksums. | |
24 | * o Convert to using a IOC3 meta driver. | |
25 | * o Which PHYs might possibly be attached to the IOC3 in real live, | |
26 | * which workarounds are required for them? Do we ever have Lucent's? | |
27 | * o For the 2.5 branch kill the mii-tool ioctls. | |
28 | */ | |
29 | ||
30 | #define IOC3_NAME "ioc3-eth" | |
d5b20697 | 31 | #define IOC3_VERSION "2.6.3-4" |
1da177e4 | 32 | |
1da177e4 LT |
33 | #include <linux/delay.h> |
34 | #include <linux/kernel.h> | |
35 | #include <linux/mm.h> | |
36 | #include <linux/errno.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/pci.h> | |
39 | #include <linux/crc32.h> | |
40 | #include <linux/mii.h> | |
41 | #include <linux/in.h> | |
42 | #include <linux/ip.h> | |
43 | #include <linux/tcp.h> | |
44 | #include <linux/udp.h> | |
910638ae | 45 | #include <linux/dma-mapping.h> |
5a0e3ad6 | 46 | #include <linux/gfp.h> |
1da177e4 LT |
47 | |
48 | #ifdef CONFIG_SERIAL_8250 | |
15a93807 RB |
49 | #include <linux/serial_core.h> |
50 | #include <linux/serial_8250.h> | |
0491d1f3 | 51 | #include <linux/serial_reg.h> |
1da177e4 LT |
52 | #endif |
53 | ||
54 | #include <linux/netdevice.h> | |
55 | #include <linux/etherdevice.h> | |
56 | #include <linux/ethtool.h> | |
57 | #include <linux/skbuff.h> | |
58 | #include <net/ip.h> | |
59 | ||
60 | #include <asm/byteorder.h> | |
1da177e4 LT |
61 | #include <asm/io.h> |
62 | #include <asm/pgtable.h> | |
7c0f6ba6 | 63 | #include <linux/uaccess.h> |
1da177e4 | 64 | #include <asm/sn/types.h> |
1da177e4 | 65 | #include <asm/sn/ioc3.h> |
1da177e4 LT |
66 | #include <asm/pci/bridge.h> |
67 | ||
68 | /* | |
69 | * 64 RX buffers. This is tunable in the range of 16 <= x < 512. The | |
70 | * value must be a power of two. | |
71 | */ | |
72 | #define RX_BUFFS 64 | |
73 | ||
74 | #define ETCSR_FD ((17<<ETCSR_IPGR2_SHIFT) | (11<<ETCSR_IPGR1_SHIFT) | 21) | |
75 | #define ETCSR_HD ((21<<ETCSR_IPGR2_SHIFT) | (21<<ETCSR_IPGR1_SHIFT) | 21) | |
76 | ||
77 | /* Private per NIC data of the driver. */ | |
78 | struct ioc3_private { | |
79 | struct ioc3 *regs; | |
80 | unsigned long *rxr; /* pointer to receiver ring */ | |
81 | struct ioc3_etxd *txr; | |
82 | struct sk_buff *rx_skbs[512]; | |
83 | struct sk_buff *tx_skbs[128]; | |
1da177e4 LT |
84 | int rx_ci; /* RX consumer index */ |
85 | int rx_pi; /* RX producer index */ | |
86 | int tx_ci; /* TX consumer index */ | |
87 | int tx_pi; /* TX producer index */ | |
88 | int txqlen; | |
89 | u32 emcr, ehar_h, ehar_l; | |
90 | spinlock_t ioc3_lock; | |
91 | struct mii_if_info mii; | |
bbfb86c5 | 92 | |
1da177e4 LT |
93 | struct pci_dev *pdev; |
94 | ||
95 | /* Members used by autonegotiation */ | |
96 | struct timer_list ioc3_timer; | |
97 | }; | |
98 | ||
99 | static inline struct net_device *priv_netdev(struct ioc3_private *dev) | |
100 | { | |
101 | return (void *)dev - ((sizeof(struct net_device) + 31) & ~31); | |
102 | } | |
103 | ||
104 | static int ioc3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); | |
105 | static void ioc3_set_multicast_list(struct net_device *dev); | |
106 | static int ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev); | |
107 | static void ioc3_timeout(struct net_device *dev); | |
108 | static inline unsigned int ioc3_hash(const unsigned char *addr); | |
109 | static inline void ioc3_stop(struct ioc3_private *ip); | |
110 | static void ioc3_init(struct net_device *dev); | |
111 | ||
112 | static const char ioc3_str[] = "IOC3 Ethernet"; | |
7282d491 | 113 | static const struct ethtool_ops ioc3_ethtool_ops; |
1da177e4 LT |
114 | |
115 | /* We use this to acquire receive skb's that we can DMA directly into. */ | |
116 | ||
117 | #define IOC3_CACHELINE 128UL | |
118 | ||
119 | static inline unsigned long aligned_rx_skb_addr(unsigned long addr) | |
120 | { | |
121 | return (~addr + 1) & (IOC3_CACHELINE - 1UL); | |
122 | } | |
123 | ||
124 | static inline struct sk_buff * ioc3_alloc_skb(unsigned long length, | |
125 | unsigned int gfp_mask) | |
126 | { | |
127 | struct sk_buff *skb; | |
128 | ||
129 | skb = alloc_skb(length + IOC3_CACHELINE - 1, gfp_mask); | |
130 | if (likely(skb)) { | |
131 | int offset = aligned_rx_skb_addr((unsigned long) skb->data); | |
132 | if (offset) | |
133 | skb_reserve(skb, offset); | |
134 | } | |
135 | ||
136 | return skb; | |
137 | } | |
138 | ||
139 | static inline unsigned long ioc3_map(void *ptr, unsigned long vdev) | |
140 | { | |
141 | #ifdef CONFIG_SGI_IP27 | |
d955d90b | 142 | vdev <<= 57; /* Shift to PCI64_ATTR_VIRTUAL */ |
1da177e4 LT |
143 | |
144 | return vdev | (0xaUL << PCI64_ATTR_TARG_SHFT) | PCI64_ATTR_PREF | | |
145 | ((unsigned long)ptr & TO_PHYS_MASK); | |
146 | #else | |
147 | return virt_to_bus(ptr); | |
148 | #endif | |
149 | } | |
150 | ||
151 | /* BEWARE: The IOC3 documentation documents the size of rx buffers as | |
152 | 1644 while it's actually 1664. This one was nasty to track down ... */ | |
153 | #define RX_OFFSET 10 | |
154 | #define RX_BUF_ALLOC_SIZE (1664 + RX_OFFSET + IOC3_CACHELINE) | |
155 | ||
156 | /* DMA barrier to separate cached and uncached accesses. */ | |
157 | #define BARRIER() \ | |
158 | __asm__("sync" ::: "memory") | |
159 | ||
160 | ||
161 | #define IOC3_SIZE 0x100000 | |
162 | ||
163 | /* | |
164 | * IOC3 is a big endian device | |
165 | * | |
166 | * Unorthodox but makes the users of these macros more readable - the pointer | |
167 | * to the IOC3's memory mapped registers is expected as struct ioc3 * ioc3 | |
168 | * in the environment. | |
169 | */ | |
170 | #define ioc3_r_mcr() be32_to_cpu(ioc3->mcr) | |
171 | #define ioc3_w_mcr(v) do { ioc3->mcr = cpu_to_be32(v); } while (0) | |
172 | #define ioc3_w_gpcr_s(v) do { ioc3->gpcr_s = cpu_to_be32(v); } while (0) | |
173 | #define ioc3_r_emcr() be32_to_cpu(ioc3->emcr) | |
174 | #define ioc3_w_emcr(v) do { ioc3->emcr = cpu_to_be32(v); } while (0) | |
175 | #define ioc3_r_eisr() be32_to_cpu(ioc3->eisr) | |
176 | #define ioc3_w_eisr(v) do { ioc3->eisr = cpu_to_be32(v); } while (0) | |
177 | #define ioc3_r_eier() be32_to_cpu(ioc3->eier) | |
178 | #define ioc3_w_eier(v) do { ioc3->eier = cpu_to_be32(v); } while (0) | |
179 | #define ioc3_r_ercsr() be32_to_cpu(ioc3->ercsr) | |
180 | #define ioc3_w_ercsr(v) do { ioc3->ercsr = cpu_to_be32(v); } while (0) | |
181 | #define ioc3_r_erbr_h() be32_to_cpu(ioc3->erbr_h) | |
182 | #define ioc3_w_erbr_h(v) do { ioc3->erbr_h = cpu_to_be32(v); } while (0) | |
183 | #define ioc3_r_erbr_l() be32_to_cpu(ioc3->erbr_l) | |
184 | #define ioc3_w_erbr_l(v) do { ioc3->erbr_l = cpu_to_be32(v); } while (0) | |
185 | #define ioc3_r_erbar() be32_to_cpu(ioc3->erbar) | |
186 | #define ioc3_w_erbar(v) do { ioc3->erbar = cpu_to_be32(v); } while (0) | |
187 | #define ioc3_r_ercir() be32_to_cpu(ioc3->ercir) | |
188 | #define ioc3_w_ercir(v) do { ioc3->ercir = cpu_to_be32(v); } while (0) | |
189 | #define ioc3_r_erpir() be32_to_cpu(ioc3->erpir) | |
190 | #define ioc3_w_erpir(v) do { ioc3->erpir = cpu_to_be32(v); } while (0) | |
191 | #define ioc3_r_ertr() be32_to_cpu(ioc3->ertr) | |
192 | #define ioc3_w_ertr(v) do { ioc3->ertr = cpu_to_be32(v); } while (0) | |
193 | #define ioc3_r_etcsr() be32_to_cpu(ioc3->etcsr) | |
194 | #define ioc3_w_etcsr(v) do { ioc3->etcsr = cpu_to_be32(v); } while (0) | |
195 | #define ioc3_r_ersr() be32_to_cpu(ioc3->ersr) | |
196 | #define ioc3_w_ersr(v) do { ioc3->ersr = cpu_to_be32(v); } while (0) | |
197 | #define ioc3_r_etcdc() be32_to_cpu(ioc3->etcdc) | |
198 | #define ioc3_w_etcdc(v) do { ioc3->etcdc = cpu_to_be32(v); } while (0) | |
199 | #define ioc3_r_ebir() be32_to_cpu(ioc3->ebir) | |
200 | #define ioc3_w_ebir(v) do { ioc3->ebir = cpu_to_be32(v); } while (0) | |
201 | #define ioc3_r_etbr_h() be32_to_cpu(ioc3->etbr_h) | |
202 | #define ioc3_w_etbr_h(v) do { ioc3->etbr_h = cpu_to_be32(v); } while (0) | |
203 | #define ioc3_r_etbr_l() be32_to_cpu(ioc3->etbr_l) | |
204 | #define ioc3_w_etbr_l(v) do { ioc3->etbr_l = cpu_to_be32(v); } while (0) | |
205 | #define ioc3_r_etcir() be32_to_cpu(ioc3->etcir) | |
206 | #define ioc3_w_etcir(v) do { ioc3->etcir = cpu_to_be32(v); } while (0) | |
207 | #define ioc3_r_etpir() be32_to_cpu(ioc3->etpir) | |
208 | #define ioc3_w_etpir(v) do { ioc3->etpir = cpu_to_be32(v); } while (0) | |
209 | #define ioc3_r_emar_h() be32_to_cpu(ioc3->emar_h) | |
210 | #define ioc3_w_emar_h(v) do { ioc3->emar_h = cpu_to_be32(v); } while (0) | |
211 | #define ioc3_r_emar_l() be32_to_cpu(ioc3->emar_l) | |
212 | #define ioc3_w_emar_l(v) do { ioc3->emar_l = cpu_to_be32(v); } while (0) | |
213 | #define ioc3_r_ehar_h() be32_to_cpu(ioc3->ehar_h) | |
214 | #define ioc3_w_ehar_h(v) do { ioc3->ehar_h = cpu_to_be32(v); } while (0) | |
215 | #define ioc3_r_ehar_l() be32_to_cpu(ioc3->ehar_l) | |
216 | #define ioc3_w_ehar_l(v) do { ioc3->ehar_l = cpu_to_be32(v); } while (0) | |
217 | #define ioc3_r_micr() be32_to_cpu(ioc3->micr) | |
218 | #define ioc3_w_micr(v) do { ioc3->micr = cpu_to_be32(v); } while (0) | |
219 | #define ioc3_r_midr_r() be32_to_cpu(ioc3->midr_r) | |
220 | #define ioc3_w_midr_r(v) do { ioc3->midr_r = cpu_to_be32(v); } while (0) | |
221 | #define ioc3_r_midr_w() be32_to_cpu(ioc3->midr_w) | |
222 | #define ioc3_w_midr_w(v) do { ioc3->midr_w = cpu_to_be32(v); } while (0) | |
223 | ||
224 | static inline u32 mcr_pack(u32 pulse, u32 sample) | |
225 | { | |
226 | return (pulse << 10) | (sample << 2); | |
227 | } | |
228 | ||
229 | static int nic_wait(struct ioc3 *ioc3) | |
230 | { | |
231 | u32 mcr; | |
232 | ||
233 | do { | |
234 | mcr = ioc3_r_mcr(); | |
235 | } while (!(mcr & 2)); | |
236 | ||
237 | return mcr & 1; | |
238 | } | |
239 | ||
240 | static int nic_reset(struct ioc3 *ioc3) | |
241 | { | |
242 | int presence; | |
243 | ||
244 | ioc3_w_mcr(mcr_pack(500, 65)); | |
245 | presence = nic_wait(ioc3); | |
246 | ||
247 | ioc3_w_mcr(mcr_pack(0, 500)); | |
248 | nic_wait(ioc3); | |
249 | ||
250 | return presence; | |
251 | } | |
252 | ||
253 | static inline int nic_read_bit(struct ioc3 *ioc3) | |
254 | { | |
255 | int result; | |
256 | ||
257 | ioc3_w_mcr(mcr_pack(6, 13)); | |
258 | result = nic_wait(ioc3); | |
259 | ioc3_w_mcr(mcr_pack(0, 100)); | |
260 | nic_wait(ioc3); | |
261 | ||
262 | return result; | |
263 | } | |
264 | ||
265 | static inline void nic_write_bit(struct ioc3 *ioc3, int bit) | |
266 | { | |
267 | if (bit) | |
268 | ioc3_w_mcr(mcr_pack(6, 110)); | |
269 | else | |
270 | ioc3_w_mcr(mcr_pack(80, 30)); | |
271 | ||
272 | nic_wait(ioc3); | |
273 | } | |
274 | ||
275 | /* | |
276 | * Read a byte from an iButton device | |
277 | */ | |
278 | static u32 nic_read_byte(struct ioc3 *ioc3) | |
279 | { | |
280 | u32 result = 0; | |
281 | int i; | |
282 | ||
283 | for (i = 0; i < 8; i++) | |
284 | result = (result >> 1) | (nic_read_bit(ioc3) << 7); | |
285 | ||
286 | return result; | |
287 | } | |
288 | ||
289 | /* | |
290 | * Write a byte to an iButton device | |
291 | */ | |
292 | static void nic_write_byte(struct ioc3 *ioc3, int byte) | |
293 | { | |
294 | int i, bit; | |
295 | ||
296 | for (i = 8; i; i--) { | |
297 | bit = byte & 1; | |
298 | byte >>= 1; | |
299 | ||
300 | nic_write_bit(ioc3, bit); | |
301 | } | |
302 | } | |
303 | ||
304 | static u64 nic_find(struct ioc3 *ioc3, int *last) | |
305 | { | |
306 | int a, b, index, disc; | |
307 | u64 address = 0; | |
308 | ||
309 | nic_reset(ioc3); | |
310 | /* Search ROM. */ | |
311 | nic_write_byte(ioc3, 0xf0); | |
312 | ||
313 | /* Algorithm from ``Book of iButton Standards''. */ | |
314 | for (index = 0, disc = 0; index < 64; index++) { | |
315 | a = nic_read_bit(ioc3); | |
316 | b = nic_read_bit(ioc3); | |
317 | ||
318 | if (a && b) { | |
319 | printk("NIC search failed (not fatal).\n"); | |
320 | *last = 0; | |
321 | return 0; | |
322 | } | |
323 | ||
324 | if (!a && !b) { | |
325 | if (index == *last) { | |
326 | address |= 1UL << index; | |
327 | } else if (index > *last) { | |
328 | address &= ~(1UL << index); | |
329 | disc = index; | |
330 | } else if ((address & (1UL << index)) == 0) | |
331 | disc = index; | |
332 | nic_write_bit(ioc3, address & (1UL << index)); | |
333 | continue; | |
334 | } else { | |
335 | if (a) | |
336 | address |= 1UL << index; | |
337 | else | |
338 | address &= ~(1UL << index); | |
339 | nic_write_bit(ioc3, a); | |
340 | continue; | |
341 | } | |
342 | } | |
343 | ||
344 | *last = disc; | |
345 | ||
346 | return address; | |
347 | } | |
348 | ||
349 | static int nic_init(struct ioc3 *ioc3) | |
350 | { | |
f49343a5 AC |
351 | const char *unknown = "unknown"; |
352 | const char *type = unknown; | |
1da177e4 LT |
353 | u8 crc; |
354 | u8 serial[6]; | |
355 | int save = 0, i; | |
356 | ||
1da177e4 LT |
357 | while (1) { |
358 | u64 reg; | |
359 | reg = nic_find(ioc3, &save); | |
360 | ||
361 | switch (reg & 0xff) { | |
362 | case 0x91: | |
363 | type = "DS1981U"; | |
364 | break; | |
365 | default: | |
366 | if (save == 0) { | |
367 | /* Let the caller try again. */ | |
368 | return -1; | |
369 | } | |
370 | continue; | |
371 | } | |
372 | ||
373 | nic_reset(ioc3); | |
374 | ||
375 | /* Match ROM. */ | |
376 | nic_write_byte(ioc3, 0x55); | |
377 | for (i = 0; i < 8; i++) | |
378 | nic_write_byte(ioc3, (reg >> (i << 3)) & 0xff); | |
379 | ||
380 | reg >>= 8; /* Shift out type. */ | |
381 | for (i = 0; i < 6; i++) { | |
382 | serial[i] = reg & 0xff; | |
383 | reg >>= 8; | |
384 | } | |
385 | crc = reg & 0xff; | |
386 | break; | |
387 | } | |
388 | ||
389 | printk("Found %s NIC", type); | |
7c510e4b JB |
390 | if (type != unknown) |
391 | printk (" registration number %pM, CRC %02x", serial, crc); | |
1da177e4 LT |
392 | printk(".\n"); |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
397 | /* | |
398 | * Read the NIC (Number-In-a-Can) device used to store the MAC address on | |
399 | * SN0 / SN00 nodeboards and PCI cards. | |
400 | */ | |
401 | static void ioc3_get_eaddr_nic(struct ioc3_private *ip) | |
402 | { | |
403 | struct ioc3 *ioc3 = ip->regs; | |
404 | u8 nic[14]; | |
405 | int tries = 2; /* There may be some problem with the battery? */ | |
406 | int i; | |
407 | ||
408 | ioc3_w_gpcr_s(1 << 21); | |
409 | ||
410 | while (tries--) { | |
411 | if (!nic_init(ioc3)) | |
412 | break; | |
413 | udelay(500); | |
414 | } | |
415 | ||
416 | if (tries < 0) { | |
417 | printk("Failed to read MAC address\n"); | |
418 | return; | |
419 | } | |
420 | ||
421 | /* Read Memory. */ | |
422 | nic_write_byte(ioc3, 0xf0); | |
423 | nic_write_byte(ioc3, 0x00); | |
424 | nic_write_byte(ioc3, 0x00); | |
425 | ||
426 | for (i = 13; i >= 0; i--) | |
427 | nic[i] = nic_read_byte(ioc3); | |
428 | ||
429 | for (i = 2; i < 8; i++) | |
430 | priv_netdev(ip)->dev_addr[i - 2] = nic[i]; | |
431 | } | |
432 | ||
433 | /* | |
434 | * Ok, this is hosed by design. It's necessary to know what machine the | |
435 | * NIC is in in order to know how to read the NIC address. We also have | |
436 | * to know if it's a PCI card or a NIC in on the node board ... | |
437 | */ | |
438 | static void ioc3_get_eaddr(struct ioc3_private *ip) | |
439 | { | |
1da177e4 LT |
440 | ioc3_get_eaddr_nic(ip); |
441 | ||
e174961c | 442 | printk("Ethernet address is %pM.\n", priv_netdev(ip)->dev_addr); |
1da177e4 LT |
443 | } |
444 | ||
445 | static void __ioc3_set_mac_address(struct net_device *dev) | |
446 | { | |
447 | struct ioc3_private *ip = netdev_priv(dev); | |
448 | struct ioc3 *ioc3 = ip->regs; | |
449 | ||
450 | ioc3_w_emar_h((dev->dev_addr[5] << 8) | dev->dev_addr[4]); | |
451 | ioc3_w_emar_l((dev->dev_addr[3] << 24) | (dev->dev_addr[2] << 16) | | |
452 | (dev->dev_addr[1] << 8) | dev->dev_addr[0]); | |
453 | } | |
454 | ||
455 | static int ioc3_set_mac_address(struct net_device *dev, void *addr) | |
456 | { | |
457 | struct ioc3_private *ip = netdev_priv(dev); | |
458 | struct sockaddr *sa = addr; | |
459 | ||
460 | memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); | |
461 | ||
462 | spin_lock_irq(&ip->ioc3_lock); | |
463 | __ioc3_set_mac_address(dev); | |
464 | spin_unlock_irq(&ip->ioc3_lock); | |
465 | ||
466 | return 0; | |
467 | } | |
468 | ||
469 | /* | |
470 | * Caller must hold the ioc3_lock ever for MII readers. This is also | |
471 | * used to protect the transmitter side but it's low contention. | |
472 | */ | |
473 | static int ioc3_mdio_read(struct net_device *dev, int phy, int reg) | |
474 | { | |
475 | struct ioc3_private *ip = netdev_priv(dev); | |
476 | struct ioc3 *ioc3 = ip->regs; | |
477 | ||
478 | while (ioc3_r_micr() & MICR_BUSY); | |
479 | ioc3_w_micr((phy << MICR_PHYADDR_SHIFT) | reg | MICR_READTRIG); | |
480 | while (ioc3_r_micr() & MICR_BUSY); | |
481 | ||
852ea22a | 482 | return ioc3_r_midr_r() & MIDR_DATA_MASK; |
1da177e4 LT |
483 | } |
484 | ||
485 | static void ioc3_mdio_write(struct net_device *dev, int phy, int reg, int data) | |
486 | { | |
487 | struct ioc3_private *ip = netdev_priv(dev); | |
488 | struct ioc3 *ioc3 = ip->regs; | |
489 | ||
490 | while (ioc3_r_micr() & MICR_BUSY); | |
491 | ioc3_w_midr_w(data); | |
492 | ioc3_w_micr((phy << MICR_PHYADDR_SHIFT) | reg); | |
493 | while (ioc3_r_micr() & MICR_BUSY); | |
494 | } | |
495 | ||
496 | static int ioc3_mii_init(struct ioc3_private *ip); | |
497 | ||
498 | static struct net_device_stats *ioc3_get_stats(struct net_device *dev) | |
499 | { | |
500 | struct ioc3_private *ip = netdev_priv(dev); | |
501 | struct ioc3 *ioc3 = ip->regs; | |
502 | ||
0a17ee90 RB |
503 | dev->stats.collisions += (ioc3_r_etcdc() & ETCDC_COLLCNT_MASK); |
504 | return &dev->stats; | |
1da177e4 LT |
505 | } |
506 | ||
1da177e4 LT |
507 | static void ioc3_tcpudp_checksum(struct sk_buff *skb, uint32_t hwsum, int len) |
508 | { | |
509 | struct ethhdr *eh = eth_hdr(skb); | |
510 | uint32_t csum, ehsum; | |
511 | unsigned int proto; | |
512 | struct iphdr *ih; | |
513 | uint16_t *ew; | |
514 | unsigned char *cp; | |
515 | ||
516 | /* | |
517 | * Did hardware handle the checksum at all? The cases we can handle | |
518 | * are: | |
519 | * | |
520 | * - TCP and UDP checksums of IPv4 only. | |
521 | * - IPv6 would be doable but we keep that for later ... | |
522 | * - Only unfragmented packets. Did somebody already tell you | |
523 | * fragmentation is evil? | |
524 | * - don't care about packet size. Worst case when processing a | |
525 | * malformed packet we'll try to access the packet at ip header + | |
526 | * 64 bytes which is still inside the skb. Even in the unlikely | |
527 | * case where the checksum is right the higher layers will still | |
528 | * drop the packet as appropriate. | |
529 | */ | |
17d0cdfa | 530 | if (eh->h_proto != htons(ETH_P_IP)) |
1da177e4 LT |
531 | return; |
532 | ||
533 | ih = (struct iphdr *) ((char *)eh + ETH_HLEN); | |
56f8a75c | 534 | if (ip_is_fragment(ih)) |
1da177e4 LT |
535 | return; |
536 | ||
537 | proto = ih->protocol; | |
538 | if (proto != IPPROTO_TCP && proto != IPPROTO_UDP) | |
539 | return; | |
540 | ||
541 | /* Same as tx - compute csum of pseudo header */ | |
542 | csum = hwsum + | |
543 | (ih->tot_len - (ih->ihl << 2)) + | |
544 | htons((uint16_t)ih->protocol) + | |
545 | (ih->saddr >> 16) + (ih->saddr & 0xffff) + | |
546 | (ih->daddr >> 16) + (ih->daddr & 0xffff); | |
547 | ||
548 | /* Sum up ethernet dest addr, src addr and protocol */ | |
549 | ew = (uint16_t *) eh; | |
550 | ehsum = ew[0] + ew[1] + ew[2] + ew[3] + ew[4] + ew[5] + ew[6]; | |
551 | ||
552 | ehsum = (ehsum & 0xffff) + (ehsum >> 16); | |
553 | ehsum = (ehsum & 0xffff) + (ehsum >> 16); | |
554 | ||
555 | csum += 0xffff ^ ehsum; | |
556 | ||
557 | /* In the next step we also subtract the 1's complement | |
558 | checksum of the trailing ethernet CRC. */ | |
559 | cp = (char *)eh + len; /* points at trailing CRC */ | |
560 | if (len & 1) { | |
561 | csum += 0xffff ^ (uint16_t) ((cp[1] << 8) | cp[0]); | |
562 | csum += 0xffff ^ (uint16_t) ((cp[3] << 8) | cp[2]); | |
563 | } else { | |
564 | csum += 0xffff ^ (uint16_t) ((cp[0] << 8) | cp[1]); | |
565 | csum += 0xffff ^ (uint16_t) ((cp[2] << 8) | cp[3]); | |
566 | } | |
567 | ||
568 | csum = (csum & 0xffff) + (csum >> 16); | |
569 | csum = (csum & 0xffff) + (csum >> 16); | |
570 | ||
571 | if (csum == 0xffff) | |
572 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
573 | } | |
1da177e4 | 574 | |
0a17ee90 | 575 | static inline void ioc3_rx(struct net_device *dev) |
1da177e4 | 576 | { |
0a17ee90 | 577 | struct ioc3_private *ip = netdev_priv(dev); |
1da177e4 LT |
578 | struct sk_buff *skb, *new_skb; |
579 | struct ioc3 *ioc3 = ip->regs; | |
580 | int rx_entry, n_entry, len; | |
581 | struct ioc3_erxbuf *rxb; | |
582 | unsigned long *rxr; | |
583 | u32 w0, err; | |
584 | ||
64699336 | 585 | rxr = ip->rxr; /* Ring base */ |
1da177e4 LT |
586 | rx_entry = ip->rx_ci; /* RX consume index */ |
587 | n_entry = ip->rx_pi; | |
588 | ||
589 | skb = ip->rx_skbs[rx_entry]; | |
590 | rxb = (struct ioc3_erxbuf *) (skb->data - RX_OFFSET); | |
591 | w0 = be32_to_cpu(rxb->w0); | |
592 | ||
593 | while (w0 & ERXBUF_V) { | |
594 | err = be32_to_cpu(rxb->err); /* It's valid ... */ | |
595 | if (err & ERXBUF_GOODPKT) { | |
596 | len = ((w0 >> ERXBUF_BYTECNT_SHIFT) & 0x7ff) - 4; | |
597 | skb_trim(skb, len); | |
0a17ee90 | 598 | skb->protocol = eth_type_trans(skb, dev); |
1da177e4 LT |
599 | |
600 | new_skb = ioc3_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC); | |
601 | if (!new_skb) { | |
602 | /* Ouch, drop packet and just recycle packet | |
603 | to keep the ring filled. */ | |
0a17ee90 | 604 | dev->stats.rx_dropped++; |
1da177e4 LT |
605 | new_skb = skb; |
606 | goto next; | |
607 | } | |
608 | ||
6d95ff97 | 609 | if (likely(dev->features & NETIF_F_RXCSUM)) |
bbfb86c5 RB |
610 | ioc3_tcpudp_checksum(skb, |
611 | w0 & ERXBUF_IPCKSUM_MASK, len); | |
1da177e4 LT |
612 | |
613 | netif_rx(skb); | |
614 | ||
615 | ip->rx_skbs[rx_entry] = NULL; /* Poison */ | |
616 | ||
1da177e4 LT |
617 | /* Because we reserve afterwards. */ |
618 | skb_put(new_skb, (1664 + RX_OFFSET)); | |
619 | rxb = (struct ioc3_erxbuf *) new_skb->data; | |
620 | skb_reserve(new_skb, RX_OFFSET); | |
621 | ||
0a17ee90 RB |
622 | dev->stats.rx_packets++; /* Statistics */ |
623 | dev->stats.rx_bytes += len; | |
1da177e4 | 624 | } else { |
0a17ee90 RB |
625 | /* The frame is invalid and the skb never |
626 | reached the network layer so we can just | |
627 | recycle it. */ | |
628 | new_skb = skb; | |
629 | dev->stats.rx_errors++; | |
1da177e4 LT |
630 | } |
631 | if (err & ERXBUF_CRCERR) /* Statistics */ | |
0a17ee90 | 632 | dev->stats.rx_crc_errors++; |
1da177e4 | 633 | if (err & ERXBUF_FRAMERR) |
0a17ee90 | 634 | dev->stats.rx_frame_errors++; |
1da177e4 LT |
635 | next: |
636 | ip->rx_skbs[n_entry] = new_skb; | |
637 | rxr[n_entry] = cpu_to_be64(ioc3_map(rxb, 1)); | |
638 | rxb->w0 = 0; /* Clear valid flag */ | |
639 | n_entry = (n_entry + 1) & 511; /* Update erpir */ | |
640 | ||
641 | /* Now go on to the next ring entry. */ | |
642 | rx_entry = (rx_entry + 1) & 511; | |
643 | skb = ip->rx_skbs[rx_entry]; | |
644 | rxb = (struct ioc3_erxbuf *) (skb->data - RX_OFFSET); | |
645 | w0 = be32_to_cpu(rxb->w0); | |
646 | } | |
647 | ioc3_w_erpir((n_entry << 3) | ERPIR_ARM); | |
648 | ip->rx_pi = n_entry; | |
649 | ip->rx_ci = rx_entry; | |
650 | } | |
651 | ||
0a17ee90 | 652 | static inline void ioc3_tx(struct net_device *dev) |
1da177e4 | 653 | { |
0a17ee90 | 654 | struct ioc3_private *ip = netdev_priv(dev); |
1da177e4 LT |
655 | unsigned long packets, bytes; |
656 | struct ioc3 *ioc3 = ip->regs; | |
657 | int tx_entry, o_entry; | |
658 | struct sk_buff *skb; | |
659 | u32 etcir; | |
660 | ||
661 | spin_lock(&ip->ioc3_lock); | |
662 | etcir = ioc3_r_etcir(); | |
663 | ||
664 | tx_entry = (etcir >> 7) & 127; | |
665 | o_entry = ip->tx_ci; | |
666 | packets = 0; | |
667 | bytes = 0; | |
668 | ||
669 | while (o_entry != tx_entry) { | |
670 | packets++; | |
671 | skb = ip->tx_skbs[o_entry]; | |
672 | bytes += skb->len; | |
673 | dev_kfree_skb_irq(skb); | |
674 | ip->tx_skbs[o_entry] = NULL; | |
675 | ||
676 | o_entry = (o_entry + 1) & 127; /* Next */ | |
677 | ||
678 | etcir = ioc3_r_etcir(); /* More pkts sent? */ | |
679 | tx_entry = (etcir >> 7) & 127; | |
680 | } | |
681 | ||
0a17ee90 RB |
682 | dev->stats.tx_packets += packets; |
683 | dev->stats.tx_bytes += bytes; | |
1da177e4 LT |
684 | ip->txqlen -= packets; |
685 | ||
686 | if (ip->txqlen < 128) | |
0a17ee90 | 687 | netif_wake_queue(dev); |
1da177e4 LT |
688 | |
689 | ip->tx_ci = o_entry; | |
690 | spin_unlock(&ip->ioc3_lock); | |
691 | } | |
692 | ||
693 | /* | |
694 | * Deal with fatal IOC3 errors. This condition might be caused by a hard or | |
695 | * software problems, so we should try to recover | |
696 | * more gracefully if this ever happens. In theory we might be flooded | |
697 | * with such error interrupts if something really goes wrong, so we might | |
698 | * also consider to take the interface down. | |
699 | */ | |
0a17ee90 | 700 | static void ioc3_error(struct net_device *dev, u32 eisr) |
1da177e4 | 701 | { |
0a17ee90 | 702 | struct ioc3_private *ip = netdev_priv(dev); |
1da177e4 LT |
703 | unsigned char *iface = dev->name; |
704 | ||
705 | spin_lock(&ip->ioc3_lock); | |
706 | ||
707 | if (eisr & EISR_RXOFLO) | |
708 | printk(KERN_ERR "%s: RX overflow.\n", iface); | |
709 | if (eisr & EISR_RXBUFOFLO) | |
710 | printk(KERN_ERR "%s: RX buffer overflow.\n", iface); | |
711 | if (eisr & EISR_RXMEMERR) | |
712 | printk(KERN_ERR "%s: RX PCI error.\n", iface); | |
713 | if (eisr & EISR_RXPARERR) | |
714 | printk(KERN_ERR "%s: RX SSRAM parity error.\n", iface); | |
715 | if (eisr & EISR_TXBUFUFLO) | |
716 | printk(KERN_ERR "%s: TX buffer underflow.\n", iface); | |
717 | if (eisr & EISR_TXMEMERR) | |
718 | printk(KERN_ERR "%s: TX PCI error.\n", iface); | |
719 | ||
720 | ioc3_stop(ip); | |
721 | ioc3_init(dev); | |
722 | ioc3_mii_init(ip); | |
723 | ||
724 | netif_wake_queue(dev); | |
725 | ||
726 | spin_unlock(&ip->ioc3_lock); | |
727 | } | |
728 | ||
729 | /* The interrupt handler does all of the Rx thread work and cleans up | |
730 | after the Tx thread. */ | |
7d12e780 | 731 | static irqreturn_t ioc3_interrupt(int irq, void *_dev) |
1da177e4 LT |
732 | { |
733 | struct net_device *dev = (struct net_device *)_dev; | |
734 | struct ioc3_private *ip = netdev_priv(dev); | |
735 | struct ioc3 *ioc3 = ip->regs; | |
736 | const u32 enabled = EISR_RXTIMERINT | EISR_RXOFLO | EISR_RXBUFOFLO | | |
737 | EISR_RXMEMERR | EISR_RXPARERR | EISR_TXBUFUFLO | | |
738 | EISR_TXEXPLICIT | EISR_TXMEMERR; | |
739 | u32 eisr; | |
740 | ||
741 | eisr = ioc3_r_eisr() & enabled; | |
742 | ||
743 | ioc3_w_eisr(eisr); | |
744 | (void) ioc3_r_eisr(); /* Flush */ | |
745 | ||
746 | if (eisr & (EISR_RXOFLO | EISR_RXBUFOFLO | EISR_RXMEMERR | | |
747 | EISR_RXPARERR | EISR_TXBUFUFLO | EISR_TXMEMERR)) | |
0a17ee90 | 748 | ioc3_error(dev, eisr); |
1da177e4 | 749 | if (eisr & EISR_RXTIMERINT) |
0a17ee90 | 750 | ioc3_rx(dev); |
1da177e4 | 751 | if (eisr & EISR_TXEXPLICIT) |
0a17ee90 | 752 | ioc3_tx(dev); |
1da177e4 LT |
753 | |
754 | return IRQ_HANDLED; | |
755 | } | |
756 | ||
757 | static inline void ioc3_setup_duplex(struct ioc3_private *ip) | |
758 | { | |
759 | struct ioc3 *ioc3 = ip->regs; | |
760 | ||
761 | if (ip->mii.full_duplex) { | |
762 | ioc3_w_etcsr(ETCSR_FD); | |
763 | ip->emcr |= EMCR_DUPLEX; | |
764 | } else { | |
765 | ioc3_w_etcsr(ETCSR_HD); | |
766 | ip->emcr &= ~EMCR_DUPLEX; | |
767 | } | |
768 | ioc3_w_emcr(ip->emcr); | |
769 | } | |
770 | ||
771 | static void ioc3_timer(unsigned long data) | |
772 | { | |
773 | struct ioc3_private *ip = (struct ioc3_private *) data; | |
774 | ||
775 | /* Print the link status if it has changed */ | |
776 | mii_check_media(&ip->mii, 1, 0); | |
777 | ioc3_setup_duplex(ip); | |
778 | ||
779 | ip->ioc3_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2s */ | |
780 | add_timer(&ip->ioc3_timer); | |
781 | } | |
782 | ||
783 | /* | |
784 | * Try to find a PHY. There is no apparent relation between the MII addresses | |
785 | * in the SGI documentation and what we find in reality, so we simply probe | |
786 | * for the PHY. It seems IOC3 PHYs usually live on address 31. One of my | |
787 | * onboard IOC3s has the special oddity that probing doesn't seem to find it | |
788 | * yet the interface seems to work fine, so if probing fails we for now will | |
789 | * simply default to PHY 31 instead of bailing out. | |
790 | */ | |
791 | static int ioc3_mii_init(struct ioc3_private *ip) | |
792 | { | |
793 | struct net_device *dev = priv_netdev(ip); | |
794 | int i, found = 0, res = 0; | |
795 | int ioc3_phy_workaround = 1; | |
796 | u16 word; | |
797 | ||
798 | for (i = 0; i < 32; i++) { | |
799 | word = ioc3_mdio_read(dev, i, MII_PHYSID1); | |
800 | ||
801 | if (word != 0xffff && word != 0x0000) { | |
802 | found = 1; | |
803 | break; /* Found a PHY */ | |
804 | } | |
805 | } | |
806 | ||
807 | if (!found) { | |
808 | if (ioc3_phy_workaround) | |
809 | i = 31; | |
810 | else { | |
811 | ip->mii.phy_id = -1; | |
812 | res = -ENODEV; | |
813 | goto out; | |
814 | } | |
815 | } | |
816 | ||
817 | ip->mii.phy_id = i; | |
f0ba7358 RB |
818 | |
819 | out: | |
820 | return res; | |
821 | } | |
822 | ||
823 | static void ioc3_mii_start(struct ioc3_private *ip) | |
824 | { | |
1da177e4 LT |
825 | ip->ioc3_timer.expires = jiffies + (12 * HZ)/10; /* 1.2 sec. */ |
826 | ip->ioc3_timer.data = (unsigned long) ip; | |
c061b18d | 827 | ip->ioc3_timer.function = ioc3_timer; |
1da177e4 | 828 | add_timer(&ip->ioc3_timer); |
1da177e4 LT |
829 | } |
830 | ||
831 | static inline void ioc3_clean_rx_ring(struct ioc3_private *ip) | |
832 | { | |
833 | struct sk_buff *skb; | |
834 | int i; | |
835 | ||
836 | for (i = ip->rx_ci; i & 15; i++) { | |
837 | ip->rx_skbs[ip->rx_pi] = ip->rx_skbs[ip->rx_ci]; | |
838 | ip->rxr[ip->rx_pi++] = ip->rxr[ip->rx_ci++]; | |
839 | } | |
840 | ip->rx_pi &= 511; | |
841 | ip->rx_ci &= 511; | |
842 | ||
843 | for (i = ip->rx_ci; i != ip->rx_pi; i = (i+1) & 511) { | |
844 | struct ioc3_erxbuf *rxb; | |
845 | skb = ip->rx_skbs[i]; | |
846 | rxb = (struct ioc3_erxbuf *) (skb->data - RX_OFFSET); | |
847 | rxb->w0 = 0; | |
848 | } | |
849 | } | |
850 | ||
851 | static inline void ioc3_clean_tx_ring(struct ioc3_private *ip) | |
852 | { | |
853 | struct sk_buff *skb; | |
854 | int i; | |
855 | ||
856 | for (i=0; i < 128; i++) { | |
857 | skb = ip->tx_skbs[i]; | |
858 | if (skb) { | |
859 | ip->tx_skbs[i] = NULL; | |
860 | dev_kfree_skb_any(skb); | |
861 | } | |
862 | ip->txr[i].cmd = 0; | |
863 | } | |
864 | ip->tx_pi = 0; | |
865 | ip->tx_ci = 0; | |
866 | } | |
867 | ||
868 | static void ioc3_free_rings(struct ioc3_private *ip) | |
869 | { | |
870 | struct sk_buff *skb; | |
871 | int rx_entry, n_entry; | |
872 | ||
873 | if (ip->txr) { | |
874 | ioc3_clean_tx_ring(ip); | |
875 | free_pages((unsigned long)ip->txr, 2); | |
876 | ip->txr = NULL; | |
877 | } | |
878 | ||
879 | if (ip->rxr) { | |
880 | n_entry = ip->rx_ci; | |
881 | rx_entry = ip->rx_pi; | |
882 | ||
883 | while (n_entry != rx_entry) { | |
884 | skb = ip->rx_skbs[n_entry]; | |
885 | if (skb) | |
886 | dev_kfree_skb_any(skb); | |
887 | ||
888 | n_entry = (n_entry + 1) & 511; | |
889 | } | |
890 | free_page((unsigned long)ip->rxr); | |
891 | ip->rxr = NULL; | |
892 | } | |
893 | } | |
894 | ||
895 | static void ioc3_alloc_rings(struct net_device *dev) | |
896 | { | |
897 | struct ioc3_private *ip = netdev_priv(dev); | |
898 | struct ioc3_erxbuf *rxb; | |
899 | unsigned long *rxr; | |
900 | int i; | |
901 | ||
902 | if (ip->rxr == NULL) { | |
903 | /* Allocate and initialize rx ring. 4kb = 512 entries */ | |
904 | ip->rxr = (unsigned long *) get_zeroed_page(GFP_ATOMIC); | |
64699336 | 905 | rxr = ip->rxr; |
1da177e4 LT |
906 | if (!rxr) |
907 | printk("ioc3_alloc_rings(): get_zeroed_page() failed!\n"); | |
908 | ||
909 | /* Now the rx buffers. The RX ring may be larger but | |
910 | we only allocate 16 buffers for now. Need to tune | |
911 | this for performance and memory later. */ | |
912 | for (i = 0; i < RX_BUFFS; i++) { | |
913 | struct sk_buff *skb; | |
914 | ||
915 | skb = ioc3_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC); | |
916 | if (!skb) { | |
7bf02ea2 | 917 | show_free_areas(0); |
1da177e4 LT |
918 | continue; |
919 | } | |
920 | ||
921 | ip->rx_skbs[i] = skb; | |
1da177e4 LT |
922 | |
923 | /* Because we reserve afterwards. */ | |
924 | skb_put(skb, (1664 + RX_OFFSET)); | |
925 | rxb = (struct ioc3_erxbuf *) skb->data; | |
926 | rxr[i] = cpu_to_be64(ioc3_map(rxb, 1)); | |
927 | skb_reserve(skb, RX_OFFSET); | |
928 | } | |
929 | ip->rx_ci = 0; | |
930 | ip->rx_pi = RX_BUFFS; | |
931 | } | |
932 | ||
933 | if (ip->txr == NULL) { | |
934 | /* Allocate and initialize tx rings. 16kb = 128 bufs. */ | |
935 | ip->txr = (struct ioc3_etxd *)__get_free_pages(GFP_KERNEL, 2); | |
936 | if (!ip->txr) | |
937 | printk("ioc3_alloc_rings(): __get_free_pages() failed!\n"); | |
938 | ip->tx_pi = 0; | |
939 | ip->tx_ci = 0; | |
940 | } | |
941 | } | |
942 | ||
943 | static void ioc3_init_rings(struct net_device *dev) | |
944 | { | |
945 | struct ioc3_private *ip = netdev_priv(dev); | |
946 | struct ioc3 *ioc3 = ip->regs; | |
947 | unsigned long ring; | |
948 | ||
949 | ioc3_free_rings(ip); | |
950 | ioc3_alloc_rings(dev); | |
951 | ||
952 | ioc3_clean_rx_ring(ip); | |
953 | ioc3_clean_tx_ring(ip); | |
954 | ||
955 | /* Now the rx ring base, consume & produce registers. */ | |
956 | ring = ioc3_map(ip->rxr, 0); | |
957 | ioc3_w_erbr_h(ring >> 32); | |
958 | ioc3_w_erbr_l(ring & 0xffffffff); | |
959 | ioc3_w_ercir(ip->rx_ci << 3); | |
960 | ioc3_w_erpir((ip->rx_pi << 3) | ERPIR_ARM); | |
961 | ||
962 | ring = ioc3_map(ip->txr, 0); | |
963 | ||
964 | ip->txqlen = 0; /* nothing queued */ | |
965 | ||
966 | /* Now the tx ring base, consume & produce registers. */ | |
967 | ioc3_w_etbr_h(ring >> 32); | |
968 | ioc3_w_etbr_l(ring & 0xffffffff); | |
969 | ioc3_w_etpir(ip->tx_pi << 7); | |
970 | ioc3_w_etcir(ip->tx_ci << 7); | |
971 | (void) ioc3_r_etcir(); /* Flush */ | |
972 | } | |
973 | ||
974 | static inline void ioc3_ssram_disc(struct ioc3_private *ip) | |
975 | { | |
976 | struct ioc3 *ioc3 = ip->regs; | |
977 | volatile u32 *ssram0 = &ioc3->ssram[0x0000]; | |
978 | volatile u32 *ssram1 = &ioc3->ssram[0x4000]; | |
979 | unsigned int pattern = 0x5555; | |
980 | ||
981 | /* Assume the larger size SSRAM and enable parity checking */ | |
982 | ioc3_w_emcr(ioc3_r_emcr() | (EMCR_BUFSIZ | EMCR_RAMPAR)); | |
983 | ||
984 | *ssram0 = pattern; | |
985 | *ssram1 = ~pattern & IOC3_SSRAM_DM; | |
986 | ||
987 | if ((*ssram0 & IOC3_SSRAM_DM) != pattern || | |
988 | (*ssram1 & IOC3_SSRAM_DM) != (~pattern & IOC3_SSRAM_DM)) { | |
989 | /* set ssram size to 64 KB */ | |
990 | ip->emcr = EMCR_RAMPAR; | |
991 | ioc3_w_emcr(ioc3_r_emcr() & ~EMCR_BUFSIZ); | |
992 | } else | |
993 | ip->emcr = EMCR_BUFSIZ | EMCR_RAMPAR; | |
994 | } | |
995 | ||
996 | static void ioc3_init(struct net_device *dev) | |
997 | { | |
998 | struct ioc3_private *ip = netdev_priv(dev); | |
999 | struct ioc3 *ioc3 = ip->regs; | |
1000 | ||
cfadbd29 | 1001 | del_timer_sync(&ip->ioc3_timer); /* Kill if running */ |
1da177e4 LT |
1002 | |
1003 | ioc3_w_emcr(EMCR_RST); /* Reset */ | |
1004 | (void) ioc3_r_emcr(); /* Flush WB */ | |
1005 | udelay(4); /* Give it time ... */ | |
1006 | ioc3_w_emcr(0); | |
1007 | (void) ioc3_r_emcr(); | |
1008 | ||
1009 | /* Misc registers */ | |
1010 | #ifdef CONFIG_SGI_IP27 | |
1011 | ioc3_w_erbar(PCI64_ATTR_BAR >> 32); /* Barrier on last store */ | |
1012 | #else | |
1013 | ioc3_w_erbar(0); /* Let PCI API get it right */ | |
1014 | #endif | |
1015 | (void) ioc3_r_etcdc(); /* Clear on read */ | |
1016 | ioc3_w_ercsr(15); /* RX low watermark */ | |
1017 | ioc3_w_ertr(0); /* Interrupt immediately */ | |
1018 | __ioc3_set_mac_address(dev); | |
1019 | ioc3_w_ehar_h(ip->ehar_h); | |
1020 | ioc3_w_ehar_l(ip->ehar_l); | |
1021 | ioc3_w_ersr(42); /* XXX should be random */ | |
1022 | ||
1023 | ioc3_init_rings(dev); | |
1024 | ||
1025 | ip->emcr |= ((RX_OFFSET / 2) << EMCR_RXOFF_SHIFT) | EMCR_TXDMAEN | | |
1026 | EMCR_TXEN | EMCR_RXDMAEN | EMCR_RXEN | EMCR_PADEN; | |
1027 | ioc3_w_emcr(ip->emcr); | |
1028 | ioc3_w_eier(EISR_RXTIMERINT | EISR_RXOFLO | EISR_RXBUFOFLO | | |
1029 | EISR_RXMEMERR | EISR_RXPARERR | EISR_TXBUFUFLO | | |
1030 | EISR_TXEXPLICIT | EISR_TXMEMERR); | |
1031 | (void) ioc3_r_eier(); | |
1032 | } | |
1033 | ||
1034 | static inline void ioc3_stop(struct ioc3_private *ip) | |
1035 | { | |
1036 | struct ioc3 *ioc3 = ip->regs; | |
1037 | ||
1038 | ioc3_w_emcr(0); /* Shutup */ | |
1039 | ioc3_w_eier(0); /* Disable interrupts */ | |
1040 | (void) ioc3_r_eier(); /* Flush */ | |
1041 | } | |
1042 | ||
1043 | static int ioc3_open(struct net_device *dev) | |
1044 | { | |
1045 | struct ioc3_private *ip = netdev_priv(dev); | |
1046 | ||
1fb9df5d | 1047 | if (request_irq(dev->irq, ioc3_interrupt, IRQF_SHARED, ioc3_str, dev)) { |
1da177e4 LT |
1048 | printk(KERN_ERR "%s: Can't get irq %d\n", dev->name, dev->irq); |
1049 | ||
1050 | return -EAGAIN; | |
1051 | } | |
1052 | ||
1053 | ip->ehar_h = 0; | |
1054 | ip->ehar_l = 0; | |
1055 | ioc3_init(dev); | |
f0ba7358 | 1056 | ioc3_mii_start(ip); |
1da177e4 LT |
1057 | |
1058 | netif_start_queue(dev); | |
1059 | return 0; | |
1060 | } | |
1061 | ||
1062 | static int ioc3_close(struct net_device *dev) | |
1063 | { | |
1064 | struct ioc3_private *ip = netdev_priv(dev); | |
1065 | ||
cfadbd29 | 1066 | del_timer_sync(&ip->ioc3_timer); |
1da177e4 LT |
1067 | |
1068 | netif_stop_queue(dev); | |
1069 | ||
1070 | ioc3_stop(ip); | |
1071 | free_irq(dev->irq, dev); | |
1072 | ||
1073 | ioc3_free_rings(ip); | |
1074 | return 0; | |
1075 | } | |
1076 | ||
1077 | /* | |
1078 | * MENET cards have four IOC3 chips, which are attached to two sets of | |
1079 | * PCI slot resources each: the primary connections are on slots | |
1080 | * 0..3 and the secondaries are on 4..7 | |
1081 | * | |
1082 | * All four ethernets are brought out to connectors; six serial ports | |
1083 | * (a pair from each of the first three IOC3s) are brought out to | |
1084 | * MiniDINs; all other subdevices are left swinging in the wind, leave | |
1085 | * them disabled. | |
1086 | */ | |
f49343a5 AC |
1087 | |
1088 | static int ioc3_adjacent_is_ioc3(struct pci_dev *pdev, int slot) | |
1089 | { | |
1090 | struct pci_dev *dev = pci_get_slot(pdev->bus, PCI_DEVFN(slot, 0)); | |
1091 | int ret = 0; | |
1092 | ||
1093 | if (dev) { | |
1094 | if (dev->vendor == PCI_VENDOR_ID_SGI && | |
1095 | dev->device == PCI_DEVICE_ID_SGI_IOC3) | |
1096 | ret = 1; | |
1097 | pci_dev_put(dev); | |
1098 | } | |
1099 | ||
1100 | return ret; | |
1101 | } | |
1102 | ||
1103 | static int ioc3_is_menet(struct pci_dev *pdev) | |
1da177e4 | 1104 | { |
f49343a5 AC |
1105 | return pdev->bus->parent == NULL && |
1106 | ioc3_adjacent_is_ioc3(pdev, 0) && | |
1107 | ioc3_adjacent_is_ioc3(pdev, 1) && | |
1108 | ioc3_adjacent_is_ioc3(pdev, 2); | |
1da177e4 LT |
1109 | } |
1110 | ||
1111 | #ifdef CONFIG_SERIAL_8250 | |
1112 | /* | |
1113 | * Note about serial ports and consoles: | |
1114 | * For console output, everyone uses the IOC3 UARTA (offset 0x178) | |
1115 | * connected to the master node (look in ip27_setup_console() and | |
1116 | * ip27prom_console_write()). | |
1117 | * | |
1118 | * For serial (/dev/ttyS0 etc), we can not have hardcoded serial port | |
1119 | * addresses on a partitioned machine. Since we currently use the ioc3 | |
1120 | * serial ports, we use dynamic serial port discovery that the serial.c | |
1121 | * driver uses for pci/pnp ports (there is an entry for the SGI ioc3 | |
1122 | * boards in pci_boards[]). Unfortunately, UARTA's pio address is greater | |
1123 | * than UARTB's, although UARTA on o200s has traditionally been known as | |
1124 | * port 0. So, we just use one serial port from each ioc3 (since the | |
1125 | * serial driver adds addresses to get to higher ports). | |
1126 | * | |
1127 | * The first one to do a register_console becomes the preferred console | |
1128 | * (if there is no kernel command line console= directive). /dev/console | |
1129 | * (ie 5, 1) is then "aliased" into the device number returned by the | |
1130 | * "device" routine referred to in this console structure | |
1131 | * (ip27prom_console_dev). | |
1132 | * | |
1133 | * Also look in ip27-pci.c:pci_fixup_ioc3() for some comments on working | |
1134 | * around ioc3 oddities in this respect. | |
1135 | * | |
0491d1f3 RB |
1136 | * The IOC3 serials use a 22MHz clock rate with an additional divider which |
1137 | * can be programmed in the SCR register if the DLAB bit is set. | |
1138 | * | |
1139 | * Register to interrupt zero because we share the interrupt with | |
1140 | * the serial driver which we don't properly support yet. | |
1141 | * | |
1142 | * Can't use UPF_IOREMAP as the whole of IOC3 resources have already been | |
1143 | * registered. | |
1da177e4 | 1144 | */ |
f48a3c2a | 1145 | static void ioc3_8250_register(struct ioc3_uartregs __iomem *uart) |
0491d1f3 RB |
1146 | { |
1147 | #define COSMISC_CONSTANT 6 | |
1148 | ||
ce7240e4 AC |
1149 | struct uart_8250_port port = { |
1150 | .port = { | |
1151 | .irq = 0, | |
1152 | .flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF, | |
1153 | .iotype = UPIO_MEM, | |
1154 | .regshift = 0, | |
1155 | .uartclk = (22000000 << 1) / COSMISC_CONSTANT, | |
1156 | ||
1157 | .membase = (unsigned char __iomem *) uart, | |
1158 | .mapbase = (unsigned long) uart, | |
1159 | } | |
0491d1f3 RB |
1160 | }; |
1161 | unsigned char lcr; | |
1162 | ||
1163 | lcr = uart->iu_lcr; | |
1164 | uart->iu_lcr = lcr | UART_LCR_DLAB; | |
1165 | uart->iu_scr = COSMISC_CONSTANT, | |
1166 | uart->iu_lcr = lcr; | |
1167 | uart->iu_lcr; | |
ce7240e4 | 1168 | serial8250_register_8250_port(&port); |
0491d1f3 | 1169 | } |
1da177e4 | 1170 | |
f48a3c2a | 1171 | static void ioc3_serial_probe(struct pci_dev *pdev, struct ioc3 *ioc3) |
1da177e4 | 1172 | { |
1da177e4 LT |
1173 | /* |
1174 | * We need to recognice and treat the fourth MENET serial as it | |
1175 | * does not have an SuperIO chip attached to it, therefore attempting | |
1176 | * to access it will result in bus errors. We call something an | |
1177 | * MENET if PCI slot 0, 1, 2 and 3 of a master PCI bus all have an IOC3 | |
1178 | * in it. This is paranoid but we want to avoid blowing up on a | |
1179 | * showhorn PCI box that happens to have 4 IOC3 cards in it so it's | |
1180 | * not paranoid enough ... | |
1181 | */ | |
1182 | if (ioc3_is_menet(pdev) && PCI_SLOT(pdev->devfn) == 3) | |
1183 | return; | |
1184 | ||
15a93807 | 1185 | /* |
0491d1f3 RB |
1186 | * Switch IOC3 to PIO mode. It probably already was but let's be |
1187 | * paranoid | |
15a93807 | 1188 | */ |
0491d1f3 RB |
1189 | ioc3->gpcr_s = GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL; |
1190 | ioc3->gpcr_s; | |
1191 | ioc3->gppr_6 = 0; | |
1192 | ioc3->gppr_6; | |
1193 | ioc3->gppr_7 = 0; | |
1194 | ioc3->gppr_7; | |
1195 | ioc3->sscr_a = ioc3->sscr_a & ~SSCR_DMA_EN; | |
1196 | ioc3->sscr_a; | |
1197 | ioc3->sscr_b = ioc3->sscr_b & ~SSCR_DMA_EN; | |
1198 | ioc3->sscr_b; | |
1199 | /* Disable all SA/B interrupts except for SA/B_INT in SIO_IEC. */ | |
1200 | ioc3->sio_iec &= ~ (SIO_IR_SA_TX_MT | SIO_IR_SA_RX_FULL | | |
1201 | SIO_IR_SA_RX_HIGH | SIO_IR_SA_RX_TIMER | | |
1202 | SIO_IR_SA_DELTA_DCD | SIO_IR_SA_DELTA_CTS | | |
1203 | SIO_IR_SA_TX_EXPLICIT | SIO_IR_SA_MEMERR); | |
1204 | ioc3->sio_iec |= SIO_IR_SA_INT; | |
1205 | ioc3->sscr_a = 0; | |
1206 | ioc3->sio_iec &= ~ (SIO_IR_SB_TX_MT | SIO_IR_SB_RX_FULL | | |
1207 | SIO_IR_SB_RX_HIGH | SIO_IR_SB_RX_TIMER | | |
1208 | SIO_IR_SB_DELTA_DCD | SIO_IR_SB_DELTA_CTS | | |
1209 | SIO_IR_SB_TX_EXPLICIT | SIO_IR_SB_MEMERR); | |
1210 | ioc3->sio_iec |= SIO_IR_SB_INT; | |
1211 | ioc3->sscr_b = 0; | |
1212 | ||
1213 | ioc3_8250_register(&ioc3->sregs.uarta); | |
1214 | ioc3_8250_register(&ioc3->sregs.uartb); | |
1da177e4 LT |
1215 | } |
1216 | #endif | |
1217 | ||
2b142542 AB |
1218 | static const struct net_device_ops ioc3_netdev_ops = { |
1219 | .ndo_open = ioc3_open, | |
1220 | .ndo_stop = ioc3_close, | |
1221 | .ndo_start_xmit = ioc3_start_xmit, | |
1222 | .ndo_tx_timeout = ioc3_timeout, | |
1223 | .ndo_get_stats = ioc3_get_stats, | |
afc4b13d | 1224 | .ndo_set_rx_mode = ioc3_set_multicast_list, |
2b142542 AB |
1225 | .ndo_do_ioctl = ioc3_ioctl, |
1226 | .ndo_validate_addr = eth_validate_addr, | |
1227 | .ndo_set_mac_address = ioc3_set_mac_address, | |
2b142542 AB |
1228 | }; |
1229 | ||
1dd06ae8 | 1230 | static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
1da177e4 LT |
1231 | { |
1232 | unsigned int sw_physid1, sw_physid2; | |
1233 | struct net_device *dev = NULL; | |
1234 | struct ioc3_private *ip; | |
1235 | struct ioc3 *ioc3; | |
1236 | unsigned long ioc3_base, ioc3_size; | |
1237 | u32 vendor, model, rev; | |
1238 | int err, pci_using_dac; | |
1239 | ||
1240 | /* Configure DMA attributes. */ | |
6a35528a | 1241 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); |
1da177e4 LT |
1242 | if (!err) { |
1243 | pci_using_dac = 1; | |
6a35528a | 1244 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
1da177e4 LT |
1245 | if (err < 0) { |
1246 | printk(KERN_ERR "%s: Unable to obtain 64 bit DMA " | |
1247 | "for consistent allocations\n", pci_name(pdev)); | |
1248 | goto out; | |
1249 | } | |
1250 | } else { | |
284901a9 | 1251 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
1da177e4 LT |
1252 | if (err) { |
1253 | printk(KERN_ERR "%s: No usable DMA configuration, " | |
1254 | "aborting.\n", pci_name(pdev)); | |
1255 | goto out; | |
1256 | } | |
1257 | pci_using_dac = 0; | |
1258 | } | |
1259 | ||
1260 | if (pci_enable_device(pdev)) | |
1261 | return -ENODEV; | |
1262 | ||
1263 | dev = alloc_etherdev(sizeof(struct ioc3_private)); | |
1264 | if (!dev) { | |
1265 | err = -ENOMEM; | |
1266 | goto out_disable; | |
1267 | } | |
1268 | ||
1269 | if (pci_using_dac) | |
1270 | dev->features |= NETIF_F_HIGHDMA; | |
1271 | ||
1272 | err = pci_request_regions(pdev, "ioc3"); | |
1273 | if (err) | |
1274 | goto out_free; | |
1275 | ||
1da177e4 LT |
1276 | SET_NETDEV_DEV(dev, &pdev->dev); |
1277 | ||
1278 | ip = netdev_priv(dev); | |
1279 | ||
1280 | dev->irq = pdev->irq; | |
1281 | ||
1282 | ioc3_base = pci_resource_start(pdev, 0); | |
1283 | ioc3_size = pci_resource_len(pdev, 0); | |
1284 | ioc3 = (struct ioc3 *) ioremap(ioc3_base, ioc3_size); | |
1285 | if (!ioc3) { | |
1286 | printk(KERN_CRIT "ioc3eth(%s): ioremap failed, goodbye.\n", | |
1287 | pci_name(pdev)); | |
1288 | err = -ENOMEM; | |
1289 | goto out_res; | |
1290 | } | |
1291 | ip->regs = ioc3; | |
1292 | ||
1293 | #ifdef CONFIG_SERIAL_8250 | |
1294 | ioc3_serial_probe(pdev, ioc3); | |
1295 | #endif | |
1296 | ||
1297 | spin_lock_init(&ip->ioc3_lock); | |
1298 | init_timer(&ip->ioc3_timer); | |
1299 | ||
1300 | ioc3_stop(ip); | |
1301 | ioc3_init(dev); | |
1302 | ||
1303 | ip->pdev = pdev; | |
1304 | ||
1305 | ip->mii.phy_id_mask = 0x1f; | |
1306 | ip->mii.reg_num_mask = 0x1f; | |
1307 | ip->mii.dev = dev; | |
1308 | ip->mii.mdio_read = ioc3_mdio_read; | |
1309 | ip->mii.mdio_write = ioc3_mdio_write; | |
1310 | ||
1311 | ioc3_mii_init(ip); | |
1312 | ||
1313 | if (ip->mii.phy_id == -1) { | |
1314 | printk(KERN_CRIT "ioc3-eth(%s): Didn't find a PHY, goodbye.\n", | |
1315 | pci_name(pdev)); | |
1316 | err = -ENODEV; | |
1317 | goto out_stop; | |
1318 | } | |
1319 | ||
f0ba7358 | 1320 | ioc3_mii_start(ip); |
1da177e4 LT |
1321 | ioc3_ssram_disc(ip); |
1322 | ioc3_get_eaddr(ip); | |
1323 | ||
1324 | /* The IOC3-specific entries in the device structure. */ | |
1da177e4 | 1325 | dev->watchdog_timeo = 5 * HZ; |
2b142542 | 1326 | dev->netdev_ops = &ioc3_netdev_ops; |
1da177e4 | 1327 | dev->ethtool_ops = &ioc3_ethtool_ops; |
6d95ff97 | 1328 | dev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; |
1da177e4 | 1329 | dev->features = NETIF_F_IP_CSUM; |
1da177e4 | 1330 | |
1da177e4 LT |
1331 | sw_physid1 = ioc3_mdio_read(dev, ip->mii.phy_id, MII_PHYSID1); |
1332 | sw_physid2 = ioc3_mdio_read(dev, ip->mii.phy_id, MII_PHYSID2); | |
1333 | ||
1334 | err = register_netdev(dev); | |
1335 | if (err) | |
1336 | goto out_stop; | |
1337 | ||
1338 | mii_check_media(&ip->mii, 1, 1); | |
852ea22a | 1339 | ioc3_setup_duplex(ip); |
1da177e4 LT |
1340 | |
1341 | vendor = (sw_physid1 << 12) | (sw_physid2 >> 4); | |
1342 | model = (sw_physid2 >> 4) & 0x3f; | |
1343 | rev = sw_physid2 & 0xf; | |
1344 | printk(KERN_INFO "%s: Using PHY %d, vendor 0x%x, model %d, " | |
1345 | "rev %d.\n", dev->name, ip->mii.phy_id, vendor, model, rev); | |
1346 | printk(KERN_INFO "%s: IOC3 SSRAM has %d kbyte.\n", dev->name, | |
1347 | ip->emcr & EMCR_BUFSIZ ? 128 : 64); | |
1348 | ||
1349 | return 0; | |
1350 | ||
1351 | out_stop: | |
1352 | ioc3_stop(ip); | |
f0ba7358 | 1353 | del_timer_sync(&ip->ioc3_timer); |
1da177e4 LT |
1354 | ioc3_free_rings(ip); |
1355 | out_res: | |
1356 | pci_release_regions(pdev); | |
1357 | out_free: | |
1358 | free_netdev(dev); | |
1359 | out_disable: | |
1360 | /* | |
1361 | * We should call pci_disable_device(pdev); here if the IOC3 wasn't | |
1362 | * such a weird device ... | |
1363 | */ | |
1364 | out: | |
1365 | return err; | |
1366 | } | |
1367 | ||
f48a3c2a | 1368 | static void ioc3_remove_one(struct pci_dev *pdev) |
1da177e4 LT |
1369 | { |
1370 | struct net_device *dev = pci_get_drvdata(pdev); | |
1371 | struct ioc3_private *ip = netdev_priv(dev); | |
1372 | struct ioc3 *ioc3 = ip->regs; | |
1373 | ||
1374 | unregister_netdev(dev); | |
f0ba7358 RB |
1375 | del_timer_sync(&ip->ioc3_timer); |
1376 | ||
1da177e4 LT |
1377 | iounmap(ioc3); |
1378 | pci_release_regions(pdev); | |
1379 | free_netdev(dev); | |
1380 | /* | |
1381 | * We should call pci_disable_device(pdev); here if the IOC3 wasn't | |
1382 | * such a weird device ... | |
1383 | */ | |
1384 | } | |
1385 | ||
9baa3c34 | 1386 | static const struct pci_device_id ioc3_pci_tbl[] = { |
1da177e4 LT |
1387 | { PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3, PCI_ANY_ID, PCI_ANY_ID }, |
1388 | { 0 } | |
1389 | }; | |
1390 | MODULE_DEVICE_TABLE(pci, ioc3_pci_tbl); | |
1391 | ||
1392 | static struct pci_driver ioc3_driver = { | |
1393 | .name = "ioc3-eth", | |
1394 | .id_table = ioc3_pci_tbl, | |
1395 | .probe = ioc3_probe, | |
f48a3c2a | 1396 | .remove = ioc3_remove_one, |
1da177e4 LT |
1397 | }; |
1398 | ||
1da177e4 LT |
1399 | static int ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev) |
1400 | { | |
1401 | unsigned long data; | |
1402 | struct ioc3_private *ip = netdev_priv(dev); | |
1403 | struct ioc3 *ioc3 = ip->regs; | |
1404 | unsigned int len; | |
1405 | struct ioc3_etxd *desc; | |
1406 | uint32_t w0 = 0; | |
1407 | int produce; | |
1408 | ||
1da177e4 LT |
1409 | /* |
1410 | * IOC3 has a fairly simple minded checksumming hardware which simply | |
1411 | * adds up the 1's complement checksum for the entire packet and | |
1412 | * inserts it at an offset which can be specified in the descriptor | |
1413 | * into the transmit packet. This means we have to compensate for the | |
1414 | * MAC header which should not be summed and the TCP/UDP pseudo headers | |
1415 | * manually. | |
1416 | */ | |
84fa7933 | 1417 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
eddc9ec5 ACM |
1418 | const struct iphdr *ih = ip_hdr(skb); |
1419 | const int proto = ntohs(ih->protocol); | |
1da177e4 | 1420 | unsigned int csoff; |
1da177e4 LT |
1421 | uint32_t csum, ehsum; |
1422 | uint16_t *eh; | |
1423 | ||
1424 | /* The MAC header. skb->mac seem the logic approach | |
1425 | to find the MAC header - except it's a NULL pointer ... */ | |
1426 | eh = (uint16_t *) skb->data; | |
1427 | ||
1428 | /* Sum up dest addr, src addr and protocol */ | |
1429 | ehsum = eh[0] + eh[1] + eh[2] + eh[3] + eh[4] + eh[5] + eh[6]; | |
1430 | ||
1431 | /* Fold ehsum. can't use csum_fold which negates also ... */ | |
1432 | ehsum = (ehsum & 0xffff) + (ehsum >> 16); | |
1433 | ehsum = (ehsum & 0xffff) + (ehsum >> 16); | |
1434 | ||
1435 | /* Skip IP header; it's sum is always zero and was | |
1436 | already filled in by ip_output.c */ | |
1437 | csum = csum_tcpudp_nofold(ih->saddr, ih->daddr, | |
1438 | ih->tot_len - (ih->ihl << 2), | |
1439 | proto, 0xffff ^ ehsum); | |
1440 | ||
1441 | csum = (csum & 0xffff) + (csum >> 16); /* Fold again */ | |
1442 | csum = (csum & 0xffff) + (csum >> 16); | |
1443 | ||
1444 | csoff = ETH_HLEN + (ih->ihl << 2); | |
1445 | if (proto == IPPROTO_UDP) { | |
1446 | csoff += offsetof(struct udphdr, check); | |
4bedb452 | 1447 | udp_hdr(skb)->check = csum; |
1da177e4 LT |
1448 | } |
1449 | if (proto == IPPROTO_TCP) { | |
1450 | csoff += offsetof(struct tcphdr, check); | |
aa8223c7 | 1451 | tcp_hdr(skb)->check = csum; |
1da177e4 LT |
1452 | } |
1453 | ||
1454 | w0 = ETXD_DOCHECKSUM | (csoff << ETXD_CHKOFF_SHIFT); | |
1455 | } | |
1da177e4 LT |
1456 | |
1457 | spin_lock_irq(&ip->ioc3_lock); | |
1458 | ||
1459 | data = (unsigned long) skb->data; | |
1460 | len = skb->len; | |
1461 | ||
1462 | produce = ip->tx_pi; | |
1463 | desc = &ip->txr[produce]; | |
1464 | ||
1465 | if (len <= 104) { | |
1466 | /* Short packet, let's copy it directly into the ring. */ | |
d626f62b | 1467 | skb_copy_from_linear_data(skb, desc->data, skb->len); |
1da177e4 LT |
1468 | if (len < ETH_ZLEN) { |
1469 | /* Very short packet, pad with zeros at the end. */ | |
1470 | memset(desc->data + len, 0, ETH_ZLEN - len); | |
1471 | len = ETH_ZLEN; | |
1472 | } | |
1473 | desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE | ETXD_D0V | w0); | |
1474 | desc->bufcnt = cpu_to_be32(len); | |
1475 | } else if ((data ^ (data + len - 1)) & 0x4000) { | |
1476 | unsigned long b2 = (data | 0x3fffUL) + 1UL; | |
1477 | unsigned long s1 = b2 - data; | |
1478 | unsigned long s2 = data + len - b2; | |
1479 | ||
1480 | desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE | | |
1481 | ETXD_B1V | ETXD_B2V | w0); | |
1482 | desc->bufcnt = cpu_to_be32((s1 << ETXD_B1CNT_SHIFT) | | |
1483 | (s2 << ETXD_B2CNT_SHIFT)); | |
1484 | desc->p1 = cpu_to_be64(ioc3_map(skb->data, 1)); | |
1485 | desc->p2 = cpu_to_be64(ioc3_map((void *) b2, 1)); | |
1486 | } else { | |
1487 | /* Normal sized packet that doesn't cross a page boundary. */ | |
1488 | desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE | ETXD_B1V | w0); | |
1489 | desc->bufcnt = cpu_to_be32(len << ETXD_B1CNT_SHIFT); | |
1490 | desc->p1 = cpu_to_be64(ioc3_map(skb->data, 1)); | |
1491 | } | |
1492 | ||
1493 | BARRIER(); | |
1494 | ||
1da177e4 LT |
1495 | ip->tx_skbs[produce] = skb; /* Remember skb */ |
1496 | produce = (produce + 1) & 127; | |
1497 | ip->tx_pi = produce; | |
1498 | ioc3_w_etpir(produce << 7); /* Fire ... */ | |
1499 | ||
1500 | ip->txqlen++; | |
1501 | ||
1502 | if (ip->txqlen >= 127) | |
1503 | netif_stop_queue(dev); | |
1504 | ||
1505 | spin_unlock_irq(&ip->ioc3_lock); | |
1506 | ||
6ed10654 | 1507 | return NETDEV_TX_OK; |
1da177e4 LT |
1508 | } |
1509 | ||
1510 | static void ioc3_timeout(struct net_device *dev) | |
1511 | { | |
1512 | struct ioc3_private *ip = netdev_priv(dev); | |
1513 | ||
1514 | printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name); | |
1515 | ||
1516 | spin_lock_irq(&ip->ioc3_lock); | |
1517 | ||
1518 | ioc3_stop(ip); | |
1519 | ioc3_init(dev); | |
1520 | ioc3_mii_init(ip); | |
f0ba7358 | 1521 | ioc3_mii_start(ip); |
1da177e4 LT |
1522 | |
1523 | spin_unlock_irq(&ip->ioc3_lock); | |
1524 | ||
1525 | netif_wake_queue(dev); | |
1526 | } | |
1527 | ||
1528 | /* | |
1529 | * Given a multicast ethernet address, this routine calculates the | |
1530 | * address's bit index in the logical address filter mask | |
1531 | */ | |
1532 | ||
1533 | static inline unsigned int ioc3_hash(const unsigned char *addr) | |
1534 | { | |
1535 | unsigned int temp = 0; | |
1536 | u32 crc; | |
1537 | int bits; | |
1538 | ||
1539 | crc = ether_crc_le(ETH_ALEN, addr); | |
1540 | ||
1541 | crc &= 0x3f; /* bit reverse lowest 6 bits for hash index */ | |
1542 | for (bits = 6; --bits >= 0; ) { | |
1543 | temp <<= 1; | |
1544 | temp |= (crc & 0x1); | |
1545 | crc >>= 1; | |
1546 | } | |
1547 | ||
1548 | return temp; | |
1549 | } | |
1550 | ||
1551 | static void ioc3_get_drvinfo (struct net_device *dev, | |
1552 | struct ethtool_drvinfo *info) | |
1553 | { | |
1554 | struct ioc3_private *ip = netdev_priv(dev); | |
852ea22a | 1555 | |
7826d43f JP |
1556 | strlcpy(info->driver, IOC3_NAME, sizeof(info->driver)); |
1557 | strlcpy(info->version, IOC3_VERSION, sizeof(info->version)); | |
1558 | strlcpy(info->bus_info, pci_name(ip->pdev), sizeof(info->bus_info)); | |
1da177e4 LT |
1559 | } |
1560 | ||
1561 | static int ioc3_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1562 | { | |
1563 | struct ioc3_private *ip = netdev_priv(dev); | |
1564 | int rc; | |
1565 | ||
1566 | spin_lock_irq(&ip->ioc3_lock); | |
1567 | rc = mii_ethtool_gset(&ip->mii, cmd); | |
1568 | spin_unlock_irq(&ip->ioc3_lock); | |
1569 | ||
1570 | return rc; | |
1571 | } | |
1572 | ||
1573 | static int ioc3_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) | |
1574 | { | |
1575 | struct ioc3_private *ip = netdev_priv(dev); | |
1576 | int rc; | |
1577 | ||
1578 | spin_lock_irq(&ip->ioc3_lock); | |
1579 | rc = mii_ethtool_sset(&ip->mii, cmd); | |
1580 | spin_unlock_irq(&ip->ioc3_lock); | |
852ea22a | 1581 | |
1da177e4 LT |
1582 | return rc; |
1583 | } | |
1584 | ||
1585 | static int ioc3_nway_reset(struct net_device *dev) | |
1586 | { | |
1587 | struct ioc3_private *ip = netdev_priv(dev); | |
1588 | int rc; | |
1589 | ||
1590 | spin_lock_irq(&ip->ioc3_lock); | |
1591 | rc = mii_nway_restart(&ip->mii); | |
1592 | spin_unlock_irq(&ip->ioc3_lock); | |
1593 | ||
1594 | return rc; | |
1595 | } | |
1596 | ||
1597 | static u32 ioc3_get_link(struct net_device *dev) | |
1598 | { | |
1599 | struct ioc3_private *ip = netdev_priv(dev); | |
1600 | int rc; | |
1601 | ||
1602 | spin_lock_irq(&ip->ioc3_lock); | |
1603 | rc = mii_link_ok(&ip->mii); | |
1604 | spin_unlock_irq(&ip->ioc3_lock); | |
1605 | ||
1606 | return rc; | |
1607 | } | |
1608 | ||
7282d491 | 1609 | static const struct ethtool_ops ioc3_ethtool_ops = { |
1da177e4 LT |
1610 | .get_drvinfo = ioc3_get_drvinfo, |
1611 | .get_settings = ioc3_get_settings, | |
1612 | .set_settings = ioc3_set_settings, | |
1613 | .nway_reset = ioc3_nway_reset, | |
1614 | .get_link = ioc3_get_link, | |
1615 | }; | |
1616 | ||
1617 | static int ioc3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) | |
1618 | { | |
1619 | struct ioc3_private *ip = netdev_priv(dev); | |
1620 | int rc; | |
1621 | ||
1622 | spin_lock_irq(&ip->ioc3_lock); | |
1623 | rc = generic_mii_ioctl(&ip->mii, if_mii(rq), cmd, NULL); | |
1624 | spin_unlock_irq(&ip->ioc3_lock); | |
1625 | ||
1626 | return rc; | |
1627 | } | |
1628 | ||
1629 | static void ioc3_set_multicast_list(struct net_device *dev) | |
1630 | { | |
22bedad3 | 1631 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1632 | struct ioc3_private *ip = netdev_priv(dev); |
1633 | struct ioc3 *ioc3 = ip->regs; | |
1634 | u64 ehar = 0; | |
1da177e4 LT |
1635 | |
1636 | netif_stop_queue(dev); /* Lock out others. */ | |
1637 | ||
1638 | if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */ | |
1da177e4 LT |
1639 | ip->emcr |= EMCR_PROMISC; |
1640 | ioc3_w_emcr(ip->emcr); | |
1641 | (void) ioc3_r_emcr(); | |
1642 | } else { | |
1643 | ip->emcr &= ~EMCR_PROMISC; | |
1644 | ioc3_w_emcr(ip->emcr); /* Clear promiscuous. */ | |
1645 | (void) ioc3_r_emcr(); | |
1646 | ||
4cd24eaf JP |
1647 | if ((dev->flags & IFF_ALLMULTI) || |
1648 | (netdev_mc_count(dev) > 64)) { | |
1da177e4 LT |
1649 | /* Too many for hashing to make sense or we want all |
1650 | multicast packets anyway, so skip computing all the | |
1651 | hashes and just accept all packets. */ | |
1652 | ip->ehar_h = 0xffffffff; | |
1653 | ip->ehar_l = 0xffffffff; | |
1654 | } else { | |
22bedad3 | 1655 | netdev_for_each_mc_addr(ha, dev) { |
498d8e23 | 1656 | ehar |= (1UL << ioc3_hash(ha->addr)); |
1da177e4 LT |
1657 | } |
1658 | ip->ehar_h = ehar >> 32; | |
1659 | ip->ehar_l = ehar & 0xffffffff; | |
1660 | } | |
1661 | ioc3_w_ehar_h(ip->ehar_h); | |
1662 | ioc3_w_ehar_l(ip->ehar_l); | |
1663 | } | |
1664 | ||
1665 | netif_wake_queue(dev); /* Let us get going again. */ | |
1666 | } | |
1667 | ||
e0fc4441 | 1668 | module_pci_driver(ioc3_driver); |
1da177e4 LT |
1669 | MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>"); |
1670 | MODULE_DESCRIPTION("SGI IOC3 Ethernet driver"); | |
1671 | MODULE_LICENSE("GPL"); |