1 /* lasi_82596.c -- driver for the intel 82596 ethernet controller, as 2 munged into HPPA boxen . 3 4 This driver is based upon 82596.c, original credits are below... 5 but there were too many hoops which HP wants jumped through to 6 keep this code in there in a sane manner. 7 8 3 primary sources of the mess -- 9 1) hppa needs *lots* of cacheline flushing to keep this kind of 10 MMIO running. 11 12 2) The 82596 needs to see all of its pointers as their physical 13 address. Thus virt_to_bus/bus_to_virt are *everywhere*. 14 15 3) The implementation HP is using seems to be significantly pickier 16 about when and how the command and RX units are started. some 17 command ordering was changed. 18 19 Examination of the mach driver leads one to believe that there 20 might be a saner way to pull this off... anyone who feels like a 21 full rewrite can be my guest. 22 23 Split 02/13/2000 Sam Creasey (sammy@oh.verio.com) 24 25 02/01/2000 Initial modifications for parisc by Helge Deller (deller@gmx.de) 26 03/02/2000 changes for better/correct(?) cache-flushing (deller) 27 */ 28 29 /* 82596.c: A generic 82596 ethernet driver for linux. */ 30 /* 31 Based on Apricot.c 32 Written 1994 by Mark Evans. 33 This driver is for the Apricot 82596 bus-master interface 34 35 Modularised 12/94 Mark Evans 36 37 38 Modified to support the 82596 ethernet chips on 680x0 VME boards. 39 by Richard Hirst <richard@sleepie.demon.co.uk> 40 Renamed to be 82596.c 41 42 980825: Changed to receive directly in to sk_buffs which are 43 allocated at open() time. Eliminates copy on incoming frames 44 (small ones are still copied). Shared data now held in a 45 non-cached page, so we can run on 68060 in copyback mode. 46 47 TBD: 48 * look at deferring rx frames rather than discarding (as per tulip) 49 * handle tx ring full as per tulip 50 * performance test to tune rx_copybreak 51 52 Most of my modifications relate to the braindead big-endian 53 implementation by Intel. When the i596 is operating in 54 'big-endian' mode, it thinks a 32 bit value of 0x12345678 55 should be stored as 0x56781234. This is a real pain, when 56 you have linked lists which are shared by the 680x0 and the 57 i596. 58 59 Driver skeleton 60 Written 1993 by Donald Becker. 61 Copyright 1993 United States Government as represented by the Director, 62 National Security Agency. This software may only be used and distributed 63 according to the terms of the GNU General Public License as modified by SRC, 64 incorporated herein by reference. 65 66 The author may be reached as becker@scyld.com, or C/O 67 Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403 68 69 */ 70 71 #include <linux/module.h> 72 #include <linux/kernel.h> 73 #include <linux/string.h> 74 #include <linux/errno.h> 75 #include <linux/ioport.h> 76 #include <linux/interrupt.h> 77 #include <linux/delay.h> 78 #include <linux/netdevice.h> 79 #include <linux/etherdevice.h> 80 #include <linux/skbuff.h> 81 #include <linux/init.h> 82 #include <linux/types.h> 83 #include <linux/bitops.h> 84 #include <linux/dma-mapping.h> 85 #include <linux/io.h> 86 #include <linux/irq.h> 87 #include <linux/gfp.h> 88 89 /* DEBUG flags 90 */ 91 92 #define DEB_INIT 0x0001 93 #define DEB_PROBE 0x0002 94 #define DEB_SERIOUS 0x0004 95 #define DEB_ERRORS 0x0008 96 #define DEB_MULTI 0x0010 97 #define DEB_TDR 0x0020 98 #define DEB_OPEN 0x0040 99 #define DEB_RESET 0x0080 100 #define DEB_ADDCMD 0x0100 101 #define DEB_STATUS 0x0200 102 #define DEB_STARTTX 0x0400 103 #define DEB_RXADDR 0x0800 104 #define DEB_TXADDR 0x1000 105 #define DEB_RXFRAME 0x2000 106 #define DEB_INTS 0x4000 107 #define DEB_STRUCT 0x8000 108 #define DEB_ANY 0xffff 109 110 111 #define DEB(x, y) if (i596_debug & (x)) { y; } 112 113 114 /* 115 * The MPU_PORT command allows direct access to the 82596. With PORT access 116 * the following commands are available (p5-18). The 32-bit port command 117 * must be word-swapped with the most significant word written first. 118 * This only applies to VME boards. 119 */ 120 #define PORT_RESET 0x00 /* reset 82596 */ 121 #define PORT_SELFTEST 0x01 /* selftest */ 122 #define PORT_ALTSCP 0x02 /* alternate SCB address */ 123 #define PORT_ALTDUMP 0x03 /* Alternate DUMP address */ 124 125 static int i596_debug = (DEB_SERIOUS|DEB_PROBE); 126 127 /* Copy frames shorter than rx_copybreak, otherwise pass on up in 128 * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha). 129 */ 130 static int rx_copybreak = 100; 131 132 #define PKT_BUF_SZ 1536 133 #define MAX_MC_CNT 64 134 135 #define ISCP_BUSY 0x0001 136 137 #define I596_NULL ((u32)0xffffffff) 138 139 #define CMD_EOL 0x8000 /* The last command of the list, stop. */ 140 #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */ 141 #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */ 142 143 #define CMD_FLEX 0x0008 /* Enable flexible memory model */ 144 145 enum commands { 146 CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3, 147 CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7 148 }; 149 150 #define STAT_C 0x8000 /* Set to 0 after execution */ 151 #define STAT_B 0x4000 /* Command being executed */ 152 #define STAT_OK 0x2000 /* Command executed ok */ 153 #define STAT_A 0x1000 /* Command aborted */ 154 155 #define CUC_START 0x0100 156 #define CUC_RESUME 0x0200 157 #define CUC_SUSPEND 0x0300 158 #define CUC_ABORT 0x0400 159 #define RX_START 0x0010 160 #define RX_RESUME 0x0020 161 #define RX_SUSPEND 0x0030 162 #define RX_ABORT 0x0040 163 164 #define TX_TIMEOUT (HZ/20) 165 166 167 struct i596_reg { 168 unsigned short porthi; 169 unsigned short portlo; 170 u32 ca; 171 }; 172 173 #define EOF 0x8000 174 #define SIZE_MASK 0x3fff 175 176 struct i596_tbd { 177 unsigned short size; 178 unsigned short pad; 179 u32 next; 180 u32 data; 181 u32 cache_pad[5]; /* Total 32 bytes... */ 182 }; 183 184 /* The command structure has two 'next' pointers; v_next is the address of 185 * the next command as seen by the CPU, b_next is the address of the next 186 * command as seen by the 82596. The b_next pointer, as used by the 82596 187 * always references the status field of the next command, rather than the 188 * v_next field, because the 82596 is unaware of v_next. It may seem more 189 * logical to put v_next at the end of the structure, but we cannot do that 190 * because the 82596 expects other fields to be there, depending on command 191 * type. 192 */ 193 194 struct i596_cmd { 195 struct i596_cmd *v_next; /* Address from CPUs viewpoint */ 196 unsigned short status; 197 unsigned short command; 198 u32 b_next; /* Address from i596 viewpoint */ 199 }; 200 201 struct tx_cmd { 202 struct i596_cmd cmd; 203 u32 tbd; 204 unsigned short size; 205 unsigned short pad; 206 struct sk_buff *skb; /* So we can free it after tx */ 207 dma_addr_t dma_addr; 208 #ifdef __LP64__ 209 u32 cache_pad[6]; /* Total 64 bytes... */ 210 #else 211 u32 cache_pad[1]; /* Total 32 bytes... */ 212 #endif 213 }; 214 215 struct tdr_cmd { 216 struct i596_cmd cmd; 217 unsigned short status; 218 unsigned short pad; 219 }; 220 221 struct mc_cmd { 222 struct i596_cmd cmd; 223 short mc_cnt; 224 char mc_addrs[MAX_MC_CNT*6]; 225 }; 226 227 struct sa_cmd { 228 struct i596_cmd cmd; 229 char eth_addr[8]; 230 }; 231 232 struct cf_cmd { 233 struct i596_cmd cmd; 234 char i596_config[16]; 235 }; 236 237 struct i596_rfd { 238 unsigned short stat; 239 unsigned short cmd; 240 u32 b_next; /* Address from i596 viewpoint */ 241 u32 rbd; 242 unsigned short count; 243 unsigned short size; 244 struct i596_rfd *v_next; /* Address from CPUs viewpoint */ 245 struct i596_rfd *v_prev; 246 #ifndef __LP64__ 247 u32 cache_pad[2]; /* Total 32 bytes... */ 248 #endif 249 }; 250 251 struct i596_rbd { 252 /* hardware data */ 253 unsigned short count; 254 unsigned short zero1; 255 u32 b_next; 256 u32 b_data; /* Address from i596 viewpoint */ 257 unsigned short size; 258 unsigned short zero2; 259 /* driver data */ 260 struct sk_buff *skb; 261 struct i596_rbd *v_next; 262 u32 b_addr; /* This rbd addr from i596 view */ 263 unsigned char *v_data; /* Address from CPUs viewpoint */ 264 /* Total 32 bytes... */ 265 #ifdef __LP64__ 266 u32 cache_pad[4]; 267 #endif 268 }; 269 270 /* These values as chosen so struct i596_dma fits in one page... */ 271 272 #define TX_RING_SIZE 32 273 #define RX_RING_SIZE 16 274 275 struct i596_scb { 276 unsigned short status; 277 unsigned short command; 278 u32 cmd; 279 u32 rfd; 280 u32 crc_err; 281 u32 align_err; 282 u32 resource_err; 283 u32 over_err; 284 u32 rcvdt_err; 285 u32 short_err; 286 unsigned short t_on; 287 unsigned short t_off; 288 }; 289 290 struct i596_iscp { 291 u32 stat; 292 u32 scb; 293 }; 294 295 struct i596_scp { 296 u32 sysbus; 297 u32 pad; 298 u32 iscp; 299 }; 300 301 struct i596_dma { 302 struct i596_scp scp __attribute__((aligned(32))); 303 volatile struct i596_iscp iscp __attribute__((aligned(32))); 304 volatile struct i596_scb scb __attribute__((aligned(32))); 305 struct sa_cmd sa_cmd __attribute__((aligned(32))); 306 struct cf_cmd cf_cmd __attribute__((aligned(32))); 307 struct tdr_cmd tdr_cmd __attribute__((aligned(32))); 308 struct mc_cmd mc_cmd __attribute__((aligned(32))); 309 struct i596_rfd rfds[RX_RING_SIZE] __attribute__((aligned(32))); 310 struct i596_rbd rbds[RX_RING_SIZE] __attribute__((aligned(32))); 311 struct tx_cmd tx_cmds[TX_RING_SIZE] __attribute__((aligned(32))); 312 struct i596_tbd tbds[TX_RING_SIZE] __attribute__((aligned(32))); 313 }; 314 315 struct i596_private { 316 struct i596_dma *dma; 317 u32 stat; 318 int last_restart; 319 struct i596_rfd *rfd_head; 320 struct i596_rbd *rbd_head; 321 struct i596_cmd *cmd_tail; 322 struct i596_cmd *cmd_head; 323 int cmd_backlog; 324 u32 last_cmd; 325 int next_tx_cmd; 326 int options; 327 spinlock_t lock; /* serialize access to chip */ 328 dma_addr_t dma_addr; 329 void __iomem *mpu_port; 330 void __iomem *ca; 331 }; 332 333 static const char init_setup[] = 334 { 335 0x8E, /* length, prefetch on */ 336 0xC8, /* fifo to 8, monitor off */ 337 0x80, /* don't save bad frames */ 338 0x2E, /* No source address insertion, 8 byte preamble */ 339 0x00, /* priority and backoff defaults */ 340 0x60, /* interframe spacing */ 341 0x00, /* slot time LSB */ 342 0xf2, /* slot time and retries */ 343 0x00, /* promiscuous mode */ 344 0x00, /* collision detect */ 345 0x40, /* minimum frame length */ 346 0xff, 347 0x00, 348 0x7f /* *multi IA */ }; 349 350 static int i596_open(struct net_device *dev); 351 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev); 352 static irqreturn_t i596_interrupt(int irq, void *dev_id); 353 static int i596_close(struct net_device *dev); 354 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd); 355 static void i596_tx_timeout (struct net_device *dev); 356 static void print_eth(unsigned char *buf, char *str); 357 static void set_multicast_list(struct net_device *dev); 358 static inline void ca(struct net_device *dev); 359 static void mpu_port(struct net_device *dev, int c, dma_addr_t x); 360 361 static int rx_ring_size = RX_RING_SIZE; 362 static int ticks_limit = 100; 363 static int max_cmd_backlog = TX_RING_SIZE-1; 364 365 #ifdef CONFIG_NET_POLL_CONTROLLER 366 static void i596_poll_controller(struct net_device *dev); 367 #endif 368 369 370 static inline int wait_istat(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str) 371 { 372 DMA_INV(dev, &(dma->iscp), sizeof(struct i596_iscp)); 373 while (--delcnt && dma->iscp.stat) { 374 udelay(10); 375 DMA_INV(dev, &(dma->iscp), sizeof(struct i596_iscp)); 376 } 377 if (!delcnt) { 378 printk(KERN_ERR "%s: %s, iscp.stat %04x, didn't clear\n", 379 dev->name, str, SWAP16(dma->iscp.stat)); 380 return -1; 381 } else 382 return 0; 383 } 384 385 386 static inline int wait_cmd(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str) 387 { 388 DMA_INV(dev, &(dma->scb), sizeof(struct i596_scb)); 389 while (--delcnt && dma->scb.command) { 390 udelay(10); 391 DMA_INV(dev, &(dma->scb), sizeof(struct i596_scb)); 392 } 393 if (!delcnt) { 394 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n", 395 dev->name, str, 396 SWAP16(dma->scb.status), 397 SWAP16(dma->scb.command)); 398 return -1; 399 } else 400 return 0; 401 } 402 403 404 static void i596_display_data(struct net_device *dev) 405 { 406 struct i596_private *lp = netdev_priv(dev); 407 struct i596_dma *dma = lp->dma; 408 struct i596_cmd *cmd; 409 struct i596_rfd *rfd; 410 struct i596_rbd *rbd; 411 412 printk(KERN_DEBUG "lp and scp at %p, .sysbus = %08x, .iscp = %08x\n", 413 &dma->scp, dma->scp.sysbus, SWAP32(dma->scp.iscp)); 414 printk(KERN_DEBUG "iscp at %p, iscp.stat = %08x, .scb = %08x\n", 415 &dma->iscp, SWAP32(dma->iscp.stat), SWAP32(dma->iscp.scb)); 416 printk(KERN_DEBUG "scb at %p, scb.status = %04x, .command = %04x," 417 " .cmd = %08x, .rfd = %08x\n", 418 &dma->scb, SWAP16(dma->scb.status), SWAP16(dma->scb.command), 419 SWAP16(dma->scb.cmd), SWAP32(dma->scb.rfd)); 420 printk(KERN_DEBUG " errors: crc %x, align %x, resource %x," 421 " over %x, rcvdt %x, short %x\n", 422 SWAP32(dma->scb.crc_err), SWAP32(dma->scb.align_err), 423 SWAP32(dma->scb.resource_err), SWAP32(dma->scb.over_err), 424 SWAP32(dma->scb.rcvdt_err), SWAP32(dma->scb.short_err)); 425 cmd = lp->cmd_head; 426 while (cmd != NULL) { 427 printk(KERN_DEBUG 428 "cmd at %p, .status = %04x, .command = %04x," 429 " .b_next = %08x\n", 430 cmd, SWAP16(cmd->status), SWAP16(cmd->command), 431 SWAP32(cmd->b_next)); 432 cmd = cmd->v_next; 433 } 434 rfd = lp->rfd_head; 435 printk(KERN_DEBUG "rfd_head = %p\n", rfd); 436 do { 437 printk(KERN_DEBUG 438 " %p .stat %04x, .cmd %04x, b_next %08x, rbd %08x," 439 " count %04x\n", 440 rfd, SWAP16(rfd->stat), SWAP16(rfd->cmd), 441 SWAP32(rfd->b_next), SWAP32(rfd->rbd), 442 SWAP16(rfd->count)); 443 rfd = rfd->v_next; 444 } while (rfd != lp->rfd_head); 445 rbd = lp->rbd_head; 446 printk(KERN_DEBUG "rbd_head = %p\n", rbd); 447 do { 448 printk(KERN_DEBUG 449 " %p .count %04x, b_next %08x, b_data %08x," 450 " size %04x\n", 451 rbd, SWAP16(rbd->count), SWAP32(rbd->b_next), 452 SWAP32(rbd->b_data), SWAP16(rbd->size)); 453 rbd = rbd->v_next; 454 } while (rbd != lp->rbd_head); 455 DMA_INV(dev, dma, sizeof(struct i596_dma)); 456 } 457 458 459 #define virt_to_dma(lp, v) ((lp)->dma_addr + (dma_addr_t)((unsigned long)(v)-(unsigned long)((lp)->dma))) 460 461 static inline int init_rx_bufs(struct net_device *dev) 462 { 463 struct i596_private *lp = netdev_priv(dev); 464 struct i596_dma *dma = lp->dma; 465 int i; 466 struct i596_rfd *rfd; 467 struct i596_rbd *rbd; 468 469 /* First build the Receive Buffer Descriptor List */ 470 471 for (i = 0, rbd = dma->rbds; i < rx_ring_size; i++, rbd++) { 472 dma_addr_t dma_addr; 473 struct sk_buff *skb; 474 475 skb = netdev_alloc_skb_ip_align(dev, PKT_BUF_SZ); 476 if (skb == NULL) 477 return -1; 478 dma_addr = dma_map_single(dev->dev.parent, skb->data, 479 PKT_BUF_SZ, DMA_FROM_DEVICE); 480 rbd->v_next = rbd+1; 481 rbd->b_next = SWAP32(virt_to_dma(lp, rbd+1)); 482 rbd->b_addr = SWAP32(virt_to_dma(lp, rbd)); 483 rbd->skb = skb; 484 rbd->v_data = skb->data; 485 rbd->b_data = SWAP32(dma_addr); 486 rbd->size = SWAP16(PKT_BUF_SZ); 487 } 488 lp->rbd_head = dma->rbds; 489 rbd = dma->rbds + rx_ring_size - 1; 490 rbd->v_next = dma->rbds; 491 rbd->b_next = SWAP32(virt_to_dma(lp, dma->rbds)); 492 493 /* Now build the Receive Frame Descriptor List */ 494 495 for (i = 0, rfd = dma->rfds; i < rx_ring_size; i++, rfd++) { 496 rfd->rbd = I596_NULL; 497 rfd->v_next = rfd+1; 498 rfd->v_prev = rfd-1; 499 rfd->b_next = SWAP32(virt_to_dma(lp, rfd+1)); 500 rfd->cmd = SWAP16(CMD_FLEX); 501 } 502 lp->rfd_head = dma->rfds; 503 dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); 504 rfd = dma->rfds; 505 rfd->rbd = SWAP32(virt_to_dma(lp, lp->rbd_head)); 506 rfd->v_prev = dma->rfds + rx_ring_size - 1; 507 rfd = dma->rfds + rx_ring_size - 1; 508 rfd->v_next = dma->rfds; 509 rfd->b_next = SWAP32(virt_to_dma(lp, dma->rfds)); 510 rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX); 511 512 DMA_WBACK_INV(dev, dma, sizeof(struct i596_dma)); 513 return 0; 514 } 515 516 static inline void remove_rx_bufs(struct net_device *dev) 517 { 518 struct i596_private *lp = netdev_priv(dev); 519 struct i596_rbd *rbd; 520 int i; 521 522 for (i = 0, rbd = lp->dma->rbds; i < rx_ring_size; i++, rbd++) { 523 if (rbd->skb == NULL) 524 break; 525 dma_unmap_single(dev->dev.parent, 526 (dma_addr_t)SWAP32(rbd->b_data), 527 PKT_BUF_SZ, DMA_FROM_DEVICE); 528 dev_kfree_skb(rbd->skb); 529 } 530 } 531 532 533 static void rebuild_rx_bufs(struct net_device *dev) 534 { 535 struct i596_private *lp = netdev_priv(dev); 536 struct i596_dma *dma = lp->dma; 537 int i; 538 539 /* Ensure rx frame/buffer descriptors are tidy */ 540 541 for (i = 0; i < rx_ring_size; i++) { 542 dma->rfds[i].rbd = I596_NULL; 543 dma->rfds[i].cmd = SWAP16(CMD_FLEX); 544 } 545 dma->rfds[rx_ring_size-1].cmd = SWAP16(CMD_EOL|CMD_FLEX); 546 lp->rfd_head = dma->rfds; 547 dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); 548 lp->rbd_head = dma->rbds; 549 dma->rfds[0].rbd = SWAP32(virt_to_dma(lp, dma->rbds)); 550 551 DMA_WBACK_INV(dev, dma, sizeof(struct i596_dma)); 552 } 553 554 555 static int init_i596_mem(struct net_device *dev) 556 { 557 struct i596_private *lp = netdev_priv(dev); 558 struct i596_dma *dma = lp->dma; 559 unsigned long flags; 560 561 mpu_port(dev, PORT_RESET, 0); 562 udelay(100); /* Wait 100us - seems to help */ 563 564 /* change the scp address */ 565 566 lp->last_cmd = jiffies; 567 568 dma->scp.sysbus = SYSBUS; 569 dma->scp.iscp = SWAP32(virt_to_dma(lp, &(dma->iscp))); 570 dma->iscp.scb = SWAP32(virt_to_dma(lp, &(dma->scb))); 571 dma->iscp.stat = SWAP32(ISCP_BUSY); 572 lp->cmd_backlog = 0; 573 574 lp->cmd_head = NULL; 575 dma->scb.cmd = I596_NULL; 576 577 DEB(DEB_INIT, printk(KERN_DEBUG "%s: starting i82596.\n", dev->name)); 578 579 DMA_WBACK(dev, &(dma->scp), sizeof(struct i596_scp)); 580 DMA_WBACK(dev, &(dma->iscp), sizeof(struct i596_iscp)); 581 DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb)); 582 583 mpu_port(dev, PORT_ALTSCP, virt_to_dma(lp, &dma->scp)); 584 ca(dev); 585 if (wait_istat(dev, dma, 1000, "initialization timed out")) 586 goto failed; 587 DEB(DEB_INIT, printk(KERN_DEBUG 588 "%s: i82596 initialization successful\n", 589 dev->name)); 590 591 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) { 592 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq); 593 goto failed; 594 } 595 596 /* Ensure rx frame/buffer descriptors are tidy */ 597 rebuild_rx_bufs(dev); 598 599 dma->scb.command = 0; 600 DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb)); 601 602 DEB(DEB_INIT, printk(KERN_DEBUG 603 "%s: queuing CmdConfigure\n", dev->name)); 604 memcpy(dma->cf_cmd.i596_config, init_setup, 14); 605 dma->cf_cmd.cmd.command = SWAP16(CmdConfigure); 606 DMA_WBACK(dev, &(dma->cf_cmd), sizeof(struct cf_cmd)); 607 i596_add_cmd(dev, &dma->cf_cmd.cmd); 608 609 DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name)); 610 memcpy(dma->sa_cmd.eth_addr, dev->dev_addr, 6); 611 dma->sa_cmd.cmd.command = SWAP16(CmdSASetup); 612 DMA_WBACK(dev, &(dma->sa_cmd), sizeof(struct sa_cmd)); 613 i596_add_cmd(dev, &dma->sa_cmd.cmd); 614 615 DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name)); 616 dma->tdr_cmd.cmd.command = SWAP16(CmdTDR); 617 DMA_WBACK(dev, &(dma->tdr_cmd), sizeof(struct tdr_cmd)); 618 i596_add_cmd(dev, &dma->tdr_cmd.cmd); 619 620 spin_lock_irqsave (&lp->lock, flags); 621 622 if (wait_cmd(dev, dma, 1000, "timed out waiting to issue RX_START")) { 623 spin_unlock_irqrestore (&lp->lock, flags); 624 goto failed_free_irq; 625 } 626 DEB(DEB_INIT, printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name)); 627 dma->scb.command = SWAP16(RX_START); 628 dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); 629 DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb)); 630 631 ca(dev); 632 633 spin_unlock_irqrestore (&lp->lock, flags); 634 if (wait_cmd(dev, dma, 1000, "RX_START not processed")) 635 goto failed_free_irq; 636 DEB(DEB_INIT, printk(KERN_DEBUG 637 "%s: Receive unit started OK\n", dev->name)); 638 return 0; 639 640 failed_free_irq: 641 free_irq(dev->irq, dev); 642 failed: 643 printk(KERN_ERR "%s: Failed to initialise 82596\n", dev->name); 644 mpu_port(dev, PORT_RESET, 0); 645 return -1; 646 } 647 648 649 static inline int i596_rx(struct net_device *dev) 650 { 651 struct i596_private *lp = netdev_priv(dev); 652 struct i596_rfd *rfd; 653 struct i596_rbd *rbd; 654 int frames = 0; 655 656 DEB(DEB_RXFRAME, printk(KERN_DEBUG 657 "i596_rx(), rfd_head %p, rbd_head %p\n", 658 lp->rfd_head, lp->rbd_head)); 659 660 661 rfd = lp->rfd_head; /* Ref next frame to check */ 662 663 DMA_INV(dev, rfd, sizeof(struct i596_rfd)); 664 while (rfd->stat & SWAP16(STAT_C)) { /* Loop while complete frames */ 665 if (rfd->rbd == I596_NULL) 666 rbd = NULL; 667 else if (rfd->rbd == lp->rbd_head->b_addr) { 668 rbd = lp->rbd_head; 669 DMA_INV(dev, rbd, sizeof(struct i596_rbd)); 670 } else { 671 printk(KERN_ERR "%s: rbd chain broken!\n", dev->name); 672 /* XXX Now what? */ 673 rbd = NULL; 674 } 675 DEB(DEB_RXFRAME, printk(KERN_DEBUG 676 " rfd %p, rfd.rbd %08x, rfd.stat %04x\n", 677 rfd, rfd->rbd, rfd->stat)); 678 679 if (rbd != NULL && (rfd->stat & SWAP16(STAT_OK))) { 680 /* a good frame */ 681 int pkt_len = SWAP16(rbd->count) & 0x3fff; 682 struct sk_buff *skb = rbd->skb; 683 int rx_in_place = 0; 684 685 DEB(DEB_RXADDR, print_eth(rbd->v_data, "received")); 686 frames++; 687 688 /* Check if the packet is long enough to just accept 689 * without copying to a properly sized skbuff. 690 */ 691 692 if (pkt_len > rx_copybreak) { 693 struct sk_buff *newskb; 694 dma_addr_t dma_addr; 695 696 dma_unmap_single(dev->dev.parent, 697 (dma_addr_t)SWAP32(rbd->b_data), 698 PKT_BUF_SZ, DMA_FROM_DEVICE); 699 /* Get fresh skbuff to replace filled one. */ 700 newskb = netdev_alloc_skb_ip_align(dev, 701 PKT_BUF_SZ); 702 if (newskb == NULL) { 703 skb = NULL; /* drop pkt */ 704 goto memory_squeeze; 705 } 706 707 /* Pass up the skb already on the Rx ring. */ 708 skb_put(skb, pkt_len); 709 rx_in_place = 1; 710 rbd->skb = newskb; 711 dma_addr = dma_map_single(dev->dev.parent, 712 newskb->data, 713 PKT_BUF_SZ, 714 DMA_FROM_DEVICE); 715 rbd->v_data = newskb->data; 716 rbd->b_data = SWAP32(dma_addr); 717 DMA_WBACK_INV(dev, rbd, sizeof(struct i596_rbd)); 718 } else 719 skb = netdev_alloc_skb_ip_align(dev, pkt_len); 720 memory_squeeze: 721 if (skb == NULL) { 722 /* XXX tulip.c can defer packets here!! */ 723 printk(KERN_ERR 724 "%s: i596_rx Memory squeeze, dropping packet.\n", 725 dev->name); 726 dev->stats.rx_dropped++; 727 } else { 728 if (!rx_in_place) { 729 /* 16 byte align the data fields */ 730 dma_sync_single_for_cpu(dev->dev.parent, 731 (dma_addr_t)SWAP32(rbd->b_data), 732 PKT_BUF_SZ, DMA_FROM_DEVICE); 733 memcpy(skb_put(skb, pkt_len), rbd->v_data, pkt_len); 734 dma_sync_single_for_device(dev->dev.parent, 735 (dma_addr_t)SWAP32(rbd->b_data), 736 PKT_BUF_SZ, DMA_FROM_DEVICE); 737 } 738 skb->len = pkt_len; 739 skb->protocol = eth_type_trans(skb, dev); 740 netif_rx(skb); 741 dev->stats.rx_packets++; 742 dev->stats.rx_bytes += pkt_len; 743 } 744 } else { 745 DEB(DEB_ERRORS, printk(KERN_DEBUG 746 "%s: Error, rfd.stat = 0x%04x\n", 747 dev->name, rfd->stat)); 748 dev->stats.rx_errors++; 749 if (rfd->stat & SWAP16(0x0100)) 750 dev->stats.collisions++; 751 if (rfd->stat & SWAP16(0x8000)) 752 dev->stats.rx_length_errors++; 753 if (rfd->stat & SWAP16(0x0001)) 754 dev->stats.rx_over_errors++; 755 if (rfd->stat & SWAP16(0x0002)) 756 dev->stats.rx_fifo_errors++; 757 if (rfd->stat & SWAP16(0x0004)) 758 dev->stats.rx_frame_errors++; 759 if (rfd->stat & SWAP16(0x0008)) 760 dev->stats.rx_crc_errors++; 761 if (rfd->stat & SWAP16(0x0010)) 762 dev->stats.rx_length_errors++; 763 } 764 765 /* Clear the buffer descriptor count and EOF + F flags */ 766 767 if (rbd != NULL && (rbd->count & SWAP16(0x4000))) { 768 rbd->count = 0; 769 lp->rbd_head = rbd->v_next; 770 DMA_WBACK_INV(dev, rbd, sizeof(struct i596_rbd)); 771 } 772 773 /* Tidy the frame descriptor, marking it as end of list */ 774 775 rfd->rbd = I596_NULL; 776 rfd->stat = 0; 777 rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX); 778 rfd->count = 0; 779 780 /* Update record of next frame descriptor to process */ 781 782 lp->dma->scb.rfd = rfd->b_next; 783 lp->rfd_head = rfd->v_next; 784 DMA_WBACK_INV(dev, rfd, sizeof(struct i596_rfd)); 785 786 /* Remove end-of-list from old end descriptor */ 787 788 rfd->v_prev->cmd = SWAP16(CMD_FLEX); 789 DMA_WBACK_INV(dev, rfd->v_prev, sizeof(struct i596_rfd)); 790 rfd = lp->rfd_head; 791 DMA_INV(dev, rfd, sizeof(struct i596_rfd)); 792 } 793 794 DEB(DEB_RXFRAME, printk(KERN_DEBUG "frames %d\n", frames)); 795 796 return 0; 797 } 798 799 800 static inline void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp) 801 { 802 struct i596_cmd *ptr; 803 804 while (lp->cmd_head != NULL) { 805 ptr = lp->cmd_head; 806 lp->cmd_head = ptr->v_next; 807 lp->cmd_backlog--; 808 809 switch (SWAP16(ptr->command) & 0x7) { 810 case CmdTx: 811 { 812 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; 813 struct sk_buff *skb = tx_cmd->skb; 814 dma_unmap_single(dev->dev.parent, 815 tx_cmd->dma_addr, 816 skb->len, DMA_TO_DEVICE); 817 818 dev_kfree_skb(skb); 819 820 dev->stats.tx_errors++; 821 dev->stats.tx_aborted_errors++; 822 823 ptr->v_next = NULL; 824 ptr->b_next = I596_NULL; 825 tx_cmd->cmd.command = 0; /* Mark as free */ 826 break; 827 } 828 default: 829 ptr->v_next = NULL; 830 ptr->b_next = I596_NULL; 831 } 832 DMA_WBACK_INV(dev, ptr, sizeof(struct i596_cmd)); 833 } 834 835 wait_cmd(dev, lp->dma, 100, "i596_cleanup_cmd timed out"); 836 lp->dma->scb.cmd = I596_NULL; 837 DMA_WBACK(dev, &(lp->dma->scb), sizeof(struct i596_scb)); 838 } 839 840 841 static inline void i596_reset(struct net_device *dev, struct i596_private *lp) 842 { 843 unsigned long flags; 844 845 DEB(DEB_RESET, printk(KERN_DEBUG "i596_reset\n")); 846 847 spin_lock_irqsave (&lp->lock, flags); 848 849 wait_cmd(dev, lp->dma, 100, "i596_reset timed out"); 850 851 netif_stop_queue(dev); 852 853 /* FIXME: this command might cause an lpmc */ 854 lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT); 855 DMA_WBACK(dev, &(lp->dma->scb), sizeof(struct i596_scb)); 856 ca(dev); 857 858 /* wait for shutdown */ 859 wait_cmd(dev, lp->dma, 1000, "i596_reset 2 timed out"); 860 spin_unlock_irqrestore (&lp->lock, flags); 861 862 i596_cleanup_cmd(dev, lp); 863 i596_rx(dev); 864 865 netif_start_queue(dev); 866 init_i596_mem(dev); 867 } 868 869 870 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) 871 { 872 struct i596_private *lp = netdev_priv(dev); 873 struct i596_dma *dma = lp->dma; 874 unsigned long flags; 875 876 DEB(DEB_ADDCMD, printk(KERN_DEBUG "i596_add_cmd cmd_head %p\n", 877 lp->cmd_head)); 878 879 cmd->status = 0; 880 cmd->command |= SWAP16(CMD_EOL | CMD_INTR); 881 cmd->v_next = NULL; 882 cmd->b_next = I596_NULL; 883 DMA_WBACK(dev, cmd, sizeof(struct i596_cmd)); 884 885 spin_lock_irqsave (&lp->lock, flags); 886 887 if (lp->cmd_head != NULL) { 888 lp->cmd_tail->v_next = cmd; 889 lp->cmd_tail->b_next = SWAP32(virt_to_dma(lp, &cmd->status)); 890 DMA_WBACK(dev, lp->cmd_tail, sizeof(struct i596_cmd)); 891 } else { 892 lp->cmd_head = cmd; 893 wait_cmd(dev, dma, 100, "i596_add_cmd timed out"); 894 dma->scb.cmd = SWAP32(virt_to_dma(lp, &cmd->status)); 895 dma->scb.command = SWAP16(CUC_START); 896 DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb)); 897 ca(dev); 898 } 899 lp->cmd_tail = cmd; 900 lp->cmd_backlog++; 901 902 spin_unlock_irqrestore (&lp->lock, flags); 903 904 if (lp->cmd_backlog > max_cmd_backlog) { 905 unsigned long tickssofar = jiffies - lp->last_cmd; 906 907 if (tickssofar < ticks_limit) 908 return; 909 910 printk(KERN_ERR 911 "%s: command unit timed out, status resetting.\n", 912 dev->name); 913 #if 1 914 i596_reset(dev, lp); 915 #endif 916 } 917 } 918 919 static int i596_open(struct net_device *dev) 920 { 921 DEB(DEB_OPEN, printk(KERN_DEBUG 922 "%s: i596_open() irq %d.\n", dev->name, dev->irq)); 923 924 if (init_rx_bufs(dev)) { 925 printk(KERN_ERR "%s: Failed to init rx bufs\n", dev->name); 926 return -EAGAIN; 927 } 928 if (init_i596_mem(dev)) { 929 printk(KERN_ERR "%s: Failed to init memory\n", dev->name); 930 goto out_remove_rx_bufs; 931 } 932 netif_start_queue(dev); 933 934 return 0; 935 936 out_remove_rx_bufs: 937 remove_rx_bufs(dev); 938 return -EAGAIN; 939 } 940 941 static void i596_tx_timeout (struct net_device *dev) 942 { 943 struct i596_private *lp = netdev_priv(dev); 944 945 /* Transmitter timeout, serious problems. */ 946 DEB(DEB_ERRORS, printk(KERN_DEBUG 947 "%s: transmit timed out, status resetting.\n", 948 dev->name)); 949 950 dev->stats.tx_errors++; 951 952 /* Try to restart the adaptor */ 953 if (lp->last_restart == dev->stats.tx_packets) { 954 DEB(DEB_ERRORS, printk(KERN_DEBUG "Resetting board.\n")); 955 /* Shutdown and restart */ 956 i596_reset (dev, lp); 957 } else { 958 /* Issue a channel attention signal */ 959 DEB(DEB_ERRORS, printk(KERN_DEBUG "Kicking board.\n")); 960 lp->dma->scb.command = SWAP16(CUC_START | RX_START); 961 DMA_WBACK_INV(dev, &(lp->dma->scb), sizeof(struct i596_scb)); 962 ca (dev); 963 lp->last_restart = dev->stats.tx_packets; 964 } 965 966 dev->trans_start = jiffies; /* prevent tx timeout */ 967 netif_wake_queue (dev); 968 } 969 970 971 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev) 972 { 973 struct i596_private *lp = netdev_priv(dev); 974 struct tx_cmd *tx_cmd; 975 struct i596_tbd *tbd; 976 short length = skb->len; 977 978 DEB(DEB_STARTTX, printk(KERN_DEBUG 979 "%s: i596_start_xmit(%x,%p) called\n", 980 dev->name, skb->len, skb->data)); 981 982 if (length < ETH_ZLEN) { 983 if (skb_padto(skb, ETH_ZLEN)) 984 return NETDEV_TX_OK; 985 length = ETH_ZLEN; 986 } 987 988 netif_stop_queue(dev); 989 990 tx_cmd = lp->dma->tx_cmds + lp->next_tx_cmd; 991 tbd = lp->dma->tbds + lp->next_tx_cmd; 992 993 if (tx_cmd->cmd.command) { 994 DEB(DEB_ERRORS, printk(KERN_DEBUG 995 "%s: xmit ring full, dropping packet.\n", 996 dev->name)); 997 dev->stats.tx_dropped++; 998 999 dev_kfree_skb(skb); 1000 } else { 1001 if (++lp->next_tx_cmd == TX_RING_SIZE) 1002 lp->next_tx_cmd = 0; 1003 tx_cmd->tbd = SWAP32(virt_to_dma(lp, tbd)); 1004 tbd->next = I596_NULL; 1005 1006 tx_cmd->cmd.command = SWAP16(CMD_FLEX | CmdTx); 1007 tx_cmd->skb = skb; 1008 1009 tx_cmd->pad = 0; 1010 tx_cmd->size = 0; 1011 tbd->pad = 0; 1012 tbd->size = SWAP16(EOF | length); 1013 1014 tx_cmd->dma_addr = dma_map_single(dev->dev.parent, skb->data, 1015 skb->len, DMA_TO_DEVICE); 1016 tbd->data = SWAP32(tx_cmd->dma_addr); 1017 1018 DEB(DEB_TXADDR, print_eth(skb->data, "tx-queued")); 1019 DMA_WBACK_INV(dev, tx_cmd, sizeof(struct tx_cmd)); 1020 DMA_WBACK_INV(dev, tbd, sizeof(struct i596_tbd)); 1021 i596_add_cmd(dev, &tx_cmd->cmd); 1022 1023 dev->stats.tx_packets++; 1024 dev->stats.tx_bytes += length; 1025 } 1026 1027 netif_start_queue(dev); 1028 1029 return NETDEV_TX_OK; 1030 } 1031 1032 static void print_eth(unsigned char *add, char *str) 1033 { 1034 printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n", 1035 add, add + 6, add, add[12], add[13], str); 1036 } 1037 static const struct net_device_ops i596_netdev_ops = { 1038 .ndo_open = i596_open, 1039 .ndo_stop = i596_close, 1040 .ndo_start_xmit = i596_start_xmit, 1041 .ndo_set_rx_mode = set_multicast_list, 1042 .ndo_tx_timeout = i596_tx_timeout, 1043 .ndo_change_mtu = eth_change_mtu, 1044 .ndo_validate_addr = eth_validate_addr, 1045 .ndo_set_mac_address = eth_mac_addr, 1046 #ifdef CONFIG_NET_POLL_CONTROLLER 1047 .ndo_poll_controller = i596_poll_controller, 1048 #endif 1049 }; 1050 1051 static int __devinit i82596_probe(struct net_device *dev) 1052 { 1053 int i; 1054 struct i596_private *lp = netdev_priv(dev); 1055 struct i596_dma *dma; 1056 1057 /* This lot is ensure things have been cache line aligned. */ 1058 BUILD_BUG_ON(sizeof(struct i596_rfd) != 32); 1059 BUILD_BUG_ON(sizeof(struct i596_rbd) & 31); 1060 BUILD_BUG_ON(sizeof(struct tx_cmd) & 31); 1061 BUILD_BUG_ON(sizeof(struct i596_tbd) != 32); 1062 #ifndef __LP64__ 1063 BUILD_BUG_ON(sizeof(struct i596_dma) > 4096); 1064 #endif 1065 1066 if (!dev->base_addr || !dev->irq) 1067 return -ENODEV; 1068 1069 dma = (struct i596_dma *) DMA_ALLOC(dev->dev.parent, 1070 sizeof(struct i596_dma), &lp->dma_addr, GFP_KERNEL); 1071 if (!dma) { 1072 printk(KERN_ERR "%s: Couldn't get shared memory\n", __FILE__); 1073 return -ENOMEM; 1074 } 1075 1076 dev->netdev_ops = &i596_netdev_ops; 1077 dev->watchdog_timeo = TX_TIMEOUT; 1078 1079 memset(dma, 0, sizeof(struct i596_dma)); 1080 lp->dma = dma; 1081 1082 dma->scb.command = 0; 1083 dma->scb.cmd = I596_NULL; 1084 dma->scb.rfd = I596_NULL; 1085 spin_lock_init(&lp->lock); 1086 1087 DMA_WBACK_INV(dev, dma, sizeof(struct i596_dma)); 1088 1089 i = register_netdev(dev); 1090 if (i) { 1091 DMA_FREE(dev->dev.parent, sizeof(struct i596_dma), 1092 (void *)dma, lp->dma_addr); 1093 return i; 1094 } 1095 1096 DEB(DEB_PROBE, printk(KERN_INFO "%s: 82596 at %#3lx, %pM IRQ %d.\n", 1097 dev->name, dev->base_addr, dev->dev_addr, 1098 dev->irq)); 1099 DEB(DEB_INIT, printk(KERN_INFO 1100 "%s: dma at 0x%p (%d bytes), lp->scb at 0x%p\n", 1101 dev->name, dma, (int)sizeof(struct i596_dma), 1102 &dma->scb)); 1103 1104 return 0; 1105 } 1106 1107 #ifdef CONFIG_NET_POLL_CONTROLLER 1108 static void i596_poll_controller(struct net_device *dev) 1109 { 1110 disable_irq(dev->irq); 1111 i596_interrupt(dev->irq, dev); 1112 enable_irq(dev->irq); 1113 } 1114 #endif 1115 1116 static irqreturn_t i596_interrupt(int irq, void *dev_id) 1117 { 1118 struct net_device *dev = dev_id; 1119 struct i596_private *lp; 1120 struct i596_dma *dma; 1121 unsigned short status, ack_cmd = 0; 1122 1123 lp = netdev_priv(dev); 1124 dma = lp->dma; 1125 1126 spin_lock (&lp->lock); 1127 1128 wait_cmd(dev, dma, 100, "i596 interrupt, timeout"); 1129 status = SWAP16(dma->scb.status); 1130 1131 DEB(DEB_INTS, printk(KERN_DEBUG 1132 "%s: i596 interrupt, IRQ %d, status %4.4x.\n", 1133 dev->name, dev->irq, status)); 1134 1135 ack_cmd = status & 0xf000; 1136 1137 if (!ack_cmd) { 1138 DEB(DEB_ERRORS, printk(KERN_DEBUG 1139 "%s: interrupt with no events\n", 1140 dev->name)); 1141 spin_unlock (&lp->lock); 1142 return IRQ_NONE; 1143 } 1144 1145 if ((status & 0x8000) || (status & 0x2000)) { 1146 struct i596_cmd *ptr; 1147 1148 if ((status & 0x8000)) 1149 DEB(DEB_INTS, 1150 printk(KERN_DEBUG 1151 "%s: i596 interrupt completed command.\n", 1152 dev->name)); 1153 if ((status & 0x2000)) 1154 DEB(DEB_INTS, 1155 printk(KERN_DEBUG 1156 "%s: i596 interrupt command unit inactive %x.\n", 1157 dev->name, status & 0x0700)); 1158 1159 while (lp->cmd_head != NULL) { 1160 DMA_INV(dev, lp->cmd_head, sizeof(struct i596_cmd)); 1161 if (!(lp->cmd_head->status & SWAP16(STAT_C))) 1162 break; 1163 1164 ptr = lp->cmd_head; 1165 1166 DEB(DEB_STATUS, 1167 printk(KERN_DEBUG 1168 "cmd_head->status = %04x, ->command = %04x\n", 1169 SWAP16(lp->cmd_head->status), 1170 SWAP16(lp->cmd_head->command))); 1171 lp->cmd_head = ptr->v_next; 1172 lp->cmd_backlog--; 1173 1174 switch (SWAP16(ptr->command) & 0x7) { 1175 case CmdTx: 1176 { 1177 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; 1178 struct sk_buff *skb = tx_cmd->skb; 1179 1180 if (ptr->status & SWAP16(STAT_OK)) { 1181 DEB(DEB_TXADDR, 1182 print_eth(skb->data, "tx-done")); 1183 } else { 1184 dev->stats.tx_errors++; 1185 if (ptr->status & SWAP16(0x0020)) 1186 dev->stats.collisions++; 1187 if (!(ptr->status & SWAP16(0x0040))) 1188 dev->stats.tx_heartbeat_errors++; 1189 if (ptr->status & SWAP16(0x0400)) 1190 dev->stats.tx_carrier_errors++; 1191 if (ptr->status & SWAP16(0x0800)) 1192 dev->stats.collisions++; 1193 if (ptr->status & SWAP16(0x1000)) 1194 dev->stats.tx_aborted_errors++; 1195 } 1196 dma_unmap_single(dev->dev.parent, 1197 tx_cmd->dma_addr, 1198 skb->len, DMA_TO_DEVICE); 1199 dev_kfree_skb_irq(skb); 1200 1201 tx_cmd->cmd.command = 0; /* Mark free */ 1202 break; 1203 } 1204 case CmdTDR: 1205 { 1206 unsigned short status = SWAP16(((struct tdr_cmd *)ptr)->status); 1207 1208 if (status & 0x8000) { 1209 DEB(DEB_ANY, 1210 printk(KERN_DEBUG "%s: link ok.\n", 1211 dev->name)); 1212 } else { 1213 if (status & 0x4000) 1214 printk(KERN_ERR 1215 "%s: Transceiver problem.\n", 1216 dev->name); 1217 if (status & 0x2000) 1218 printk(KERN_ERR 1219 "%s: Termination problem.\n", 1220 dev->name); 1221 if (status & 0x1000) 1222 printk(KERN_ERR 1223 "%s: Short circuit.\n", 1224 dev->name); 1225 1226 DEB(DEB_TDR, 1227 printk(KERN_DEBUG "%s: Time %d.\n", 1228 dev->name, status & 0x07ff)); 1229 } 1230 break; 1231 } 1232 case CmdConfigure: 1233 /* 1234 * Zap command so set_multicast_list() know 1235 * it is free 1236 */ 1237 ptr->command = 0; 1238 break; 1239 } 1240 ptr->v_next = NULL; 1241 ptr->b_next = I596_NULL; 1242 DMA_WBACK(dev, ptr, sizeof(struct i596_cmd)); 1243 lp->last_cmd = jiffies; 1244 } 1245 1246 /* This mess is arranging that only the last of any outstanding 1247 * commands has the interrupt bit set. Should probably really 1248 * only add to the cmd queue when the CU is stopped. 1249 */ 1250 ptr = lp->cmd_head; 1251 while ((ptr != NULL) && (ptr != lp->cmd_tail)) { 1252 struct i596_cmd *prev = ptr; 1253 1254 ptr->command &= SWAP16(0x1fff); 1255 ptr = ptr->v_next; 1256 DMA_WBACK_INV(dev, prev, sizeof(struct i596_cmd)); 1257 } 1258 1259 if (lp->cmd_head != NULL) 1260 ack_cmd |= CUC_START; 1261 dma->scb.cmd = SWAP32(virt_to_dma(lp, &lp->cmd_head->status)); 1262 DMA_WBACK_INV(dev, &dma->scb, sizeof(struct i596_scb)); 1263 } 1264 if ((status & 0x1000) || (status & 0x4000)) { 1265 if ((status & 0x4000)) 1266 DEB(DEB_INTS, 1267 printk(KERN_DEBUG 1268 "%s: i596 interrupt received a frame.\n", 1269 dev->name)); 1270 i596_rx(dev); 1271 /* Only RX_START if stopped - RGH 07-07-96 */ 1272 if (status & 0x1000) { 1273 if (netif_running(dev)) { 1274 DEB(DEB_ERRORS, 1275 printk(KERN_DEBUG 1276 "%s: i596 interrupt receive unit inactive, status 0x%x\n", 1277 dev->name, status)); 1278 ack_cmd |= RX_START; 1279 dev->stats.rx_errors++; 1280 dev->stats.rx_fifo_errors++; 1281 rebuild_rx_bufs(dev); 1282 } 1283 } 1284 } 1285 wait_cmd(dev, dma, 100, "i596 interrupt, timeout"); 1286 dma->scb.command = SWAP16(ack_cmd); 1287 DMA_WBACK(dev, &dma->scb, sizeof(struct i596_scb)); 1288 1289 /* DANGER: I suspect that some kind of interrupt 1290 acknowledgement aside from acking the 82596 might be needed 1291 here... but it's running acceptably without */ 1292 1293 ca(dev); 1294 1295 wait_cmd(dev, dma, 100, "i596 interrupt, exit timeout"); 1296 DEB(DEB_INTS, printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name)); 1297 1298 spin_unlock (&lp->lock); 1299 return IRQ_HANDLED; 1300 } 1301 1302 static int i596_close(struct net_device *dev) 1303 { 1304 struct i596_private *lp = netdev_priv(dev); 1305 unsigned long flags; 1306 1307 netif_stop_queue(dev); 1308 1309 DEB(DEB_INIT, 1310 printk(KERN_DEBUG 1311 "%s: Shutting down ethercard, status was %4.4x.\n", 1312 dev->name, SWAP16(lp->dma->scb.status))); 1313 1314 spin_lock_irqsave(&lp->lock, flags); 1315 1316 wait_cmd(dev, lp->dma, 100, "close1 timed out"); 1317 lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT); 1318 DMA_WBACK(dev, &lp->dma->scb, sizeof(struct i596_scb)); 1319 1320 ca(dev); 1321 1322 wait_cmd(dev, lp->dma, 100, "close2 timed out"); 1323 spin_unlock_irqrestore(&lp->lock, flags); 1324 DEB(DEB_STRUCT, i596_display_data(dev)); 1325 i596_cleanup_cmd(dev, lp); 1326 1327 free_irq(dev->irq, dev); 1328 remove_rx_bufs(dev); 1329 1330 return 0; 1331 } 1332 1333 /* 1334 * Set or clear the multicast filter for this adaptor. 1335 */ 1336 1337 static void set_multicast_list(struct net_device *dev) 1338 { 1339 struct i596_private *lp = netdev_priv(dev); 1340 struct i596_dma *dma = lp->dma; 1341 int config = 0, cnt; 1342 1343 DEB(DEB_MULTI, 1344 printk(KERN_DEBUG 1345 "%s: set multicast list, %d entries, promisc %s, allmulti %s\n", 1346 dev->name, netdev_mc_count(dev), 1347 dev->flags & IFF_PROMISC ? "ON" : "OFF", 1348 dev->flags & IFF_ALLMULTI ? "ON" : "OFF")); 1349 1350 if ((dev->flags & IFF_PROMISC) && 1351 !(dma->cf_cmd.i596_config[8] & 0x01)) { 1352 dma->cf_cmd.i596_config[8] |= 0x01; 1353 config = 1; 1354 } 1355 if (!(dev->flags & IFF_PROMISC) && 1356 (dma->cf_cmd.i596_config[8] & 0x01)) { 1357 dma->cf_cmd.i596_config[8] &= ~0x01; 1358 config = 1; 1359 } 1360 if ((dev->flags & IFF_ALLMULTI) && 1361 (dma->cf_cmd.i596_config[11] & 0x20)) { 1362 dma->cf_cmd.i596_config[11] &= ~0x20; 1363 config = 1; 1364 } 1365 if (!(dev->flags & IFF_ALLMULTI) && 1366 !(dma->cf_cmd.i596_config[11] & 0x20)) { 1367 dma->cf_cmd.i596_config[11] |= 0x20; 1368 config = 1; 1369 } 1370 if (config) { 1371 if (dma->cf_cmd.cmd.command) 1372 printk(KERN_INFO 1373 "%s: config change request already queued\n", 1374 dev->name); 1375 else { 1376 dma->cf_cmd.cmd.command = SWAP16(CmdConfigure); 1377 DMA_WBACK_INV(dev, &dma->cf_cmd, sizeof(struct cf_cmd)); 1378 i596_add_cmd(dev, &dma->cf_cmd.cmd); 1379 } 1380 } 1381 1382 cnt = netdev_mc_count(dev); 1383 if (cnt > MAX_MC_CNT) { 1384 cnt = MAX_MC_CNT; 1385 printk(KERN_NOTICE "%s: Only %d multicast addresses supported", 1386 dev->name, cnt); 1387 } 1388 1389 if (!netdev_mc_empty(dev)) { 1390 struct netdev_hw_addr *ha; 1391 unsigned char *cp; 1392 struct mc_cmd *cmd; 1393 1394 cmd = &dma->mc_cmd; 1395 cmd->cmd.command = SWAP16(CmdMulticastList); 1396 cmd->mc_cnt = SWAP16(netdev_mc_count(dev) * 6); 1397 cp = cmd->mc_addrs; 1398 netdev_for_each_mc_addr(ha, dev) { 1399 if (!cnt--) 1400 break; 1401 memcpy(cp, ha->addr, 6); 1402 if (i596_debug > 1) 1403 DEB(DEB_MULTI, 1404 printk(KERN_DEBUG 1405 "%s: Adding address %pM\n", 1406 dev->name, cp)); 1407 cp += 6; 1408 } 1409 DMA_WBACK_INV(dev, &dma->mc_cmd, sizeof(struct mc_cmd)); 1410 i596_add_cmd(dev, &cmd->cmd); 1411 } 1412 } 1413