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, ETH_ALEN); 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 } 721 memory_squeeze: 722 if (skb == NULL) { 723 /* XXX tulip.c can defer packets here!! */ 724 dev->stats.rx_dropped++; 725 } else { 726 if (!rx_in_place) { 727 /* 16 byte align the data fields */ 728 dma_sync_single_for_cpu(dev->dev.parent, 729 (dma_addr_t)SWAP32(rbd->b_data), 730 PKT_BUF_SZ, DMA_FROM_DEVICE); 731 memcpy(skb_put(skb, pkt_len), rbd->v_data, pkt_len); 732 dma_sync_single_for_device(dev->dev.parent, 733 (dma_addr_t)SWAP32(rbd->b_data), 734 PKT_BUF_SZ, DMA_FROM_DEVICE); 735 } 736 skb->len = pkt_len; 737 skb->protocol = eth_type_trans(skb, dev); 738 netif_rx(skb); 739 dev->stats.rx_packets++; 740 dev->stats.rx_bytes += pkt_len; 741 } 742 } else { 743 DEB(DEB_ERRORS, printk(KERN_DEBUG 744 "%s: Error, rfd.stat = 0x%04x\n", 745 dev->name, rfd->stat)); 746 dev->stats.rx_errors++; 747 if (rfd->stat & SWAP16(0x0100)) 748 dev->stats.collisions++; 749 if (rfd->stat & SWAP16(0x8000)) 750 dev->stats.rx_length_errors++; 751 if (rfd->stat & SWAP16(0x0001)) 752 dev->stats.rx_over_errors++; 753 if (rfd->stat & SWAP16(0x0002)) 754 dev->stats.rx_fifo_errors++; 755 if (rfd->stat & SWAP16(0x0004)) 756 dev->stats.rx_frame_errors++; 757 if (rfd->stat & SWAP16(0x0008)) 758 dev->stats.rx_crc_errors++; 759 if (rfd->stat & SWAP16(0x0010)) 760 dev->stats.rx_length_errors++; 761 } 762 763 /* Clear the buffer descriptor count and EOF + F flags */ 764 765 if (rbd != NULL && (rbd->count & SWAP16(0x4000))) { 766 rbd->count = 0; 767 lp->rbd_head = rbd->v_next; 768 DMA_WBACK_INV(dev, rbd, sizeof(struct i596_rbd)); 769 } 770 771 /* Tidy the frame descriptor, marking it as end of list */ 772 773 rfd->rbd = I596_NULL; 774 rfd->stat = 0; 775 rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX); 776 rfd->count = 0; 777 778 /* Update record of next frame descriptor to process */ 779 780 lp->dma->scb.rfd = rfd->b_next; 781 lp->rfd_head = rfd->v_next; 782 DMA_WBACK_INV(dev, rfd, sizeof(struct i596_rfd)); 783 784 /* Remove end-of-list from old end descriptor */ 785 786 rfd->v_prev->cmd = SWAP16(CMD_FLEX); 787 DMA_WBACK_INV(dev, rfd->v_prev, sizeof(struct i596_rfd)); 788 rfd = lp->rfd_head; 789 DMA_INV(dev, rfd, sizeof(struct i596_rfd)); 790 } 791 792 DEB(DEB_RXFRAME, printk(KERN_DEBUG "frames %d\n", frames)); 793 794 return 0; 795 } 796 797 798 static inline void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp) 799 { 800 struct i596_cmd *ptr; 801 802 while (lp->cmd_head != NULL) { 803 ptr = lp->cmd_head; 804 lp->cmd_head = ptr->v_next; 805 lp->cmd_backlog--; 806 807 switch (SWAP16(ptr->command) & 0x7) { 808 case CmdTx: 809 { 810 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; 811 struct sk_buff *skb = tx_cmd->skb; 812 dma_unmap_single(dev->dev.parent, 813 tx_cmd->dma_addr, 814 skb->len, DMA_TO_DEVICE); 815 816 dev_kfree_skb(skb); 817 818 dev->stats.tx_errors++; 819 dev->stats.tx_aborted_errors++; 820 821 ptr->v_next = NULL; 822 ptr->b_next = I596_NULL; 823 tx_cmd->cmd.command = 0; /* Mark as free */ 824 break; 825 } 826 default: 827 ptr->v_next = NULL; 828 ptr->b_next = I596_NULL; 829 } 830 DMA_WBACK_INV(dev, ptr, sizeof(struct i596_cmd)); 831 } 832 833 wait_cmd(dev, lp->dma, 100, "i596_cleanup_cmd timed out"); 834 lp->dma->scb.cmd = I596_NULL; 835 DMA_WBACK(dev, &(lp->dma->scb), sizeof(struct i596_scb)); 836 } 837 838 839 static inline void i596_reset(struct net_device *dev, struct i596_private *lp) 840 { 841 unsigned long flags; 842 843 DEB(DEB_RESET, printk(KERN_DEBUG "i596_reset\n")); 844 845 spin_lock_irqsave (&lp->lock, flags); 846 847 wait_cmd(dev, lp->dma, 100, "i596_reset timed out"); 848 849 netif_stop_queue(dev); 850 851 /* FIXME: this command might cause an lpmc */ 852 lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT); 853 DMA_WBACK(dev, &(lp->dma->scb), sizeof(struct i596_scb)); 854 ca(dev); 855 856 /* wait for shutdown */ 857 wait_cmd(dev, lp->dma, 1000, "i596_reset 2 timed out"); 858 spin_unlock_irqrestore (&lp->lock, flags); 859 860 i596_cleanup_cmd(dev, lp); 861 i596_rx(dev); 862 863 netif_start_queue(dev); 864 init_i596_mem(dev); 865 } 866 867 868 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) 869 { 870 struct i596_private *lp = netdev_priv(dev); 871 struct i596_dma *dma = lp->dma; 872 unsigned long flags; 873 874 DEB(DEB_ADDCMD, printk(KERN_DEBUG "i596_add_cmd cmd_head %p\n", 875 lp->cmd_head)); 876 877 cmd->status = 0; 878 cmd->command |= SWAP16(CMD_EOL | CMD_INTR); 879 cmd->v_next = NULL; 880 cmd->b_next = I596_NULL; 881 DMA_WBACK(dev, cmd, sizeof(struct i596_cmd)); 882 883 spin_lock_irqsave (&lp->lock, flags); 884 885 if (lp->cmd_head != NULL) { 886 lp->cmd_tail->v_next = cmd; 887 lp->cmd_tail->b_next = SWAP32(virt_to_dma(lp, &cmd->status)); 888 DMA_WBACK(dev, lp->cmd_tail, sizeof(struct i596_cmd)); 889 } else { 890 lp->cmd_head = cmd; 891 wait_cmd(dev, dma, 100, "i596_add_cmd timed out"); 892 dma->scb.cmd = SWAP32(virt_to_dma(lp, &cmd->status)); 893 dma->scb.command = SWAP16(CUC_START); 894 DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb)); 895 ca(dev); 896 } 897 lp->cmd_tail = cmd; 898 lp->cmd_backlog++; 899 900 spin_unlock_irqrestore (&lp->lock, flags); 901 902 if (lp->cmd_backlog > max_cmd_backlog) { 903 unsigned long tickssofar = jiffies - lp->last_cmd; 904 905 if (tickssofar < ticks_limit) 906 return; 907 908 printk(KERN_ERR 909 "%s: command unit timed out, status resetting.\n", 910 dev->name); 911 #if 1 912 i596_reset(dev, lp); 913 #endif 914 } 915 } 916 917 static int i596_open(struct net_device *dev) 918 { 919 DEB(DEB_OPEN, printk(KERN_DEBUG 920 "%s: i596_open() irq %d.\n", dev->name, dev->irq)); 921 922 if (init_rx_bufs(dev)) { 923 printk(KERN_ERR "%s: Failed to init rx bufs\n", dev->name); 924 return -EAGAIN; 925 } 926 if (init_i596_mem(dev)) { 927 printk(KERN_ERR "%s: Failed to init memory\n", dev->name); 928 goto out_remove_rx_bufs; 929 } 930 netif_start_queue(dev); 931 932 return 0; 933 934 out_remove_rx_bufs: 935 remove_rx_bufs(dev); 936 return -EAGAIN; 937 } 938 939 static void i596_tx_timeout (struct net_device *dev) 940 { 941 struct i596_private *lp = netdev_priv(dev); 942 943 /* Transmitter timeout, serious problems. */ 944 DEB(DEB_ERRORS, printk(KERN_DEBUG 945 "%s: transmit timed out, status resetting.\n", 946 dev->name)); 947 948 dev->stats.tx_errors++; 949 950 /* Try to restart the adaptor */ 951 if (lp->last_restart == dev->stats.tx_packets) { 952 DEB(DEB_ERRORS, printk(KERN_DEBUG "Resetting board.\n")); 953 /* Shutdown and restart */ 954 i596_reset (dev, lp); 955 } else { 956 /* Issue a channel attention signal */ 957 DEB(DEB_ERRORS, printk(KERN_DEBUG "Kicking board.\n")); 958 lp->dma->scb.command = SWAP16(CUC_START | RX_START); 959 DMA_WBACK_INV(dev, &(lp->dma->scb), sizeof(struct i596_scb)); 960 ca (dev); 961 lp->last_restart = dev->stats.tx_packets; 962 } 963 964 dev->trans_start = jiffies; /* prevent tx timeout */ 965 netif_wake_queue (dev); 966 } 967 968 969 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev) 970 { 971 struct i596_private *lp = netdev_priv(dev); 972 struct tx_cmd *tx_cmd; 973 struct i596_tbd *tbd; 974 short length = skb->len; 975 976 DEB(DEB_STARTTX, printk(KERN_DEBUG 977 "%s: i596_start_xmit(%x,%p) called\n", 978 dev->name, skb->len, skb->data)); 979 980 if (length < ETH_ZLEN) { 981 if (skb_padto(skb, ETH_ZLEN)) 982 return NETDEV_TX_OK; 983 length = ETH_ZLEN; 984 } 985 986 netif_stop_queue(dev); 987 988 tx_cmd = lp->dma->tx_cmds + lp->next_tx_cmd; 989 tbd = lp->dma->tbds + lp->next_tx_cmd; 990 991 if (tx_cmd->cmd.command) { 992 DEB(DEB_ERRORS, printk(KERN_DEBUG 993 "%s: xmit ring full, dropping packet.\n", 994 dev->name)); 995 dev->stats.tx_dropped++; 996 997 dev_kfree_skb(skb); 998 } else { 999 if (++lp->next_tx_cmd == TX_RING_SIZE) 1000 lp->next_tx_cmd = 0; 1001 tx_cmd->tbd = SWAP32(virt_to_dma(lp, tbd)); 1002 tbd->next = I596_NULL; 1003 1004 tx_cmd->cmd.command = SWAP16(CMD_FLEX | CmdTx); 1005 tx_cmd->skb = skb; 1006 1007 tx_cmd->pad = 0; 1008 tx_cmd->size = 0; 1009 tbd->pad = 0; 1010 tbd->size = SWAP16(EOF | length); 1011 1012 tx_cmd->dma_addr = dma_map_single(dev->dev.parent, skb->data, 1013 skb->len, DMA_TO_DEVICE); 1014 tbd->data = SWAP32(tx_cmd->dma_addr); 1015 1016 DEB(DEB_TXADDR, print_eth(skb->data, "tx-queued")); 1017 DMA_WBACK_INV(dev, tx_cmd, sizeof(struct tx_cmd)); 1018 DMA_WBACK_INV(dev, tbd, sizeof(struct i596_tbd)); 1019 i596_add_cmd(dev, &tx_cmd->cmd); 1020 1021 dev->stats.tx_packets++; 1022 dev->stats.tx_bytes += length; 1023 } 1024 1025 netif_start_queue(dev); 1026 1027 return NETDEV_TX_OK; 1028 } 1029 1030 static void print_eth(unsigned char *add, char *str) 1031 { 1032 printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n", 1033 add, add + 6, add, add[12], add[13], str); 1034 } 1035 static const struct net_device_ops i596_netdev_ops = { 1036 .ndo_open = i596_open, 1037 .ndo_stop = i596_close, 1038 .ndo_start_xmit = i596_start_xmit, 1039 .ndo_set_rx_mode = set_multicast_list, 1040 .ndo_tx_timeout = i596_tx_timeout, 1041 .ndo_change_mtu = eth_change_mtu, 1042 .ndo_validate_addr = eth_validate_addr, 1043 .ndo_set_mac_address = eth_mac_addr, 1044 #ifdef CONFIG_NET_POLL_CONTROLLER 1045 .ndo_poll_controller = i596_poll_controller, 1046 #endif 1047 }; 1048 1049 static int i82596_probe(struct net_device *dev) 1050 { 1051 int i; 1052 struct i596_private *lp = netdev_priv(dev); 1053 struct i596_dma *dma; 1054 1055 /* This lot is ensure things have been cache line aligned. */ 1056 BUILD_BUG_ON(sizeof(struct i596_rfd) != 32); 1057 BUILD_BUG_ON(sizeof(struct i596_rbd) & 31); 1058 BUILD_BUG_ON(sizeof(struct tx_cmd) & 31); 1059 BUILD_BUG_ON(sizeof(struct i596_tbd) != 32); 1060 #ifndef __LP64__ 1061 BUILD_BUG_ON(sizeof(struct i596_dma) > 4096); 1062 #endif 1063 1064 if (!dev->base_addr || !dev->irq) 1065 return -ENODEV; 1066 1067 dma = (struct i596_dma *) DMA_ALLOC(dev->dev.parent, 1068 sizeof(struct i596_dma), &lp->dma_addr, GFP_KERNEL); 1069 if (!dma) { 1070 printk(KERN_ERR "%s: Couldn't get shared memory\n", __FILE__); 1071 return -ENOMEM; 1072 } 1073 1074 dev->netdev_ops = &i596_netdev_ops; 1075 dev->watchdog_timeo = TX_TIMEOUT; 1076 1077 memset(dma, 0, sizeof(struct i596_dma)); 1078 lp->dma = dma; 1079 1080 dma->scb.command = 0; 1081 dma->scb.cmd = I596_NULL; 1082 dma->scb.rfd = I596_NULL; 1083 spin_lock_init(&lp->lock); 1084 1085 DMA_WBACK_INV(dev, dma, sizeof(struct i596_dma)); 1086 1087 i = register_netdev(dev); 1088 if (i) { 1089 DMA_FREE(dev->dev.parent, sizeof(struct i596_dma), 1090 (void *)dma, lp->dma_addr); 1091 return i; 1092 } 1093 1094 DEB(DEB_PROBE, printk(KERN_INFO "%s: 82596 at %#3lx, %pM IRQ %d.\n", 1095 dev->name, dev->base_addr, dev->dev_addr, 1096 dev->irq)); 1097 DEB(DEB_INIT, printk(KERN_INFO 1098 "%s: dma at 0x%p (%d bytes), lp->scb at 0x%p\n", 1099 dev->name, dma, (int)sizeof(struct i596_dma), 1100 &dma->scb)); 1101 1102 return 0; 1103 } 1104 1105 #ifdef CONFIG_NET_POLL_CONTROLLER 1106 static void i596_poll_controller(struct net_device *dev) 1107 { 1108 disable_irq(dev->irq); 1109 i596_interrupt(dev->irq, dev); 1110 enable_irq(dev->irq); 1111 } 1112 #endif 1113 1114 static irqreturn_t i596_interrupt(int irq, void *dev_id) 1115 { 1116 struct net_device *dev = dev_id; 1117 struct i596_private *lp; 1118 struct i596_dma *dma; 1119 unsigned short status, ack_cmd = 0; 1120 1121 lp = netdev_priv(dev); 1122 dma = lp->dma; 1123 1124 spin_lock (&lp->lock); 1125 1126 wait_cmd(dev, dma, 100, "i596 interrupt, timeout"); 1127 status = SWAP16(dma->scb.status); 1128 1129 DEB(DEB_INTS, printk(KERN_DEBUG 1130 "%s: i596 interrupt, IRQ %d, status %4.4x.\n", 1131 dev->name, dev->irq, status)); 1132 1133 ack_cmd = status & 0xf000; 1134 1135 if (!ack_cmd) { 1136 DEB(DEB_ERRORS, printk(KERN_DEBUG 1137 "%s: interrupt with no events\n", 1138 dev->name)); 1139 spin_unlock (&lp->lock); 1140 return IRQ_NONE; 1141 } 1142 1143 if ((status & 0x8000) || (status & 0x2000)) { 1144 struct i596_cmd *ptr; 1145 1146 if ((status & 0x8000)) 1147 DEB(DEB_INTS, 1148 printk(KERN_DEBUG 1149 "%s: i596 interrupt completed command.\n", 1150 dev->name)); 1151 if ((status & 0x2000)) 1152 DEB(DEB_INTS, 1153 printk(KERN_DEBUG 1154 "%s: i596 interrupt command unit inactive %x.\n", 1155 dev->name, status & 0x0700)); 1156 1157 while (lp->cmd_head != NULL) { 1158 DMA_INV(dev, lp->cmd_head, sizeof(struct i596_cmd)); 1159 if (!(lp->cmd_head->status & SWAP16(STAT_C))) 1160 break; 1161 1162 ptr = lp->cmd_head; 1163 1164 DEB(DEB_STATUS, 1165 printk(KERN_DEBUG 1166 "cmd_head->status = %04x, ->command = %04x\n", 1167 SWAP16(lp->cmd_head->status), 1168 SWAP16(lp->cmd_head->command))); 1169 lp->cmd_head = ptr->v_next; 1170 lp->cmd_backlog--; 1171 1172 switch (SWAP16(ptr->command) & 0x7) { 1173 case CmdTx: 1174 { 1175 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; 1176 struct sk_buff *skb = tx_cmd->skb; 1177 1178 if (ptr->status & SWAP16(STAT_OK)) { 1179 DEB(DEB_TXADDR, 1180 print_eth(skb->data, "tx-done")); 1181 } else { 1182 dev->stats.tx_errors++; 1183 if (ptr->status & SWAP16(0x0020)) 1184 dev->stats.collisions++; 1185 if (!(ptr->status & SWAP16(0x0040))) 1186 dev->stats.tx_heartbeat_errors++; 1187 if (ptr->status & SWAP16(0x0400)) 1188 dev->stats.tx_carrier_errors++; 1189 if (ptr->status & SWAP16(0x0800)) 1190 dev->stats.collisions++; 1191 if (ptr->status & SWAP16(0x1000)) 1192 dev->stats.tx_aborted_errors++; 1193 } 1194 dma_unmap_single(dev->dev.parent, 1195 tx_cmd->dma_addr, 1196 skb->len, DMA_TO_DEVICE); 1197 dev_kfree_skb_irq(skb); 1198 1199 tx_cmd->cmd.command = 0; /* Mark free */ 1200 break; 1201 } 1202 case CmdTDR: 1203 { 1204 unsigned short status = SWAP16(((struct tdr_cmd *)ptr)->status); 1205 1206 if (status & 0x8000) { 1207 DEB(DEB_ANY, 1208 printk(KERN_DEBUG "%s: link ok.\n", 1209 dev->name)); 1210 } else { 1211 if (status & 0x4000) 1212 printk(KERN_ERR 1213 "%s: Transceiver problem.\n", 1214 dev->name); 1215 if (status & 0x2000) 1216 printk(KERN_ERR 1217 "%s: Termination problem.\n", 1218 dev->name); 1219 if (status & 0x1000) 1220 printk(KERN_ERR 1221 "%s: Short circuit.\n", 1222 dev->name); 1223 1224 DEB(DEB_TDR, 1225 printk(KERN_DEBUG "%s: Time %d.\n", 1226 dev->name, status & 0x07ff)); 1227 } 1228 break; 1229 } 1230 case CmdConfigure: 1231 /* 1232 * Zap command so set_multicast_list() know 1233 * it is free 1234 */ 1235 ptr->command = 0; 1236 break; 1237 } 1238 ptr->v_next = NULL; 1239 ptr->b_next = I596_NULL; 1240 DMA_WBACK(dev, ptr, sizeof(struct i596_cmd)); 1241 lp->last_cmd = jiffies; 1242 } 1243 1244 /* This mess is arranging that only the last of any outstanding 1245 * commands has the interrupt bit set. Should probably really 1246 * only add to the cmd queue when the CU is stopped. 1247 */ 1248 ptr = lp->cmd_head; 1249 while ((ptr != NULL) && (ptr != lp->cmd_tail)) { 1250 struct i596_cmd *prev = ptr; 1251 1252 ptr->command &= SWAP16(0x1fff); 1253 ptr = ptr->v_next; 1254 DMA_WBACK_INV(dev, prev, sizeof(struct i596_cmd)); 1255 } 1256 1257 if (lp->cmd_head != NULL) 1258 ack_cmd |= CUC_START; 1259 dma->scb.cmd = SWAP32(virt_to_dma(lp, &lp->cmd_head->status)); 1260 DMA_WBACK_INV(dev, &dma->scb, sizeof(struct i596_scb)); 1261 } 1262 if ((status & 0x1000) || (status & 0x4000)) { 1263 if ((status & 0x4000)) 1264 DEB(DEB_INTS, 1265 printk(KERN_DEBUG 1266 "%s: i596 interrupt received a frame.\n", 1267 dev->name)); 1268 i596_rx(dev); 1269 /* Only RX_START if stopped - RGH 07-07-96 */ 1270 if (status & 0x1000) { 1271 if (netif_running(dev)) { 1272 DEB(DEB_ERRORS, 1273 printk(KERN_DEBUG 1274 "%s: i596 interrupt receive unit inactive, status 0x%x\n", 1275 dev->name, status)); 1276 ack_cmd |= RX_START; 1277 dev->stats.rx_errors++; 1278 dev->stats.rx_fifo_errors++; 1279 rebuild_rx_bufs(dev); 1280 } 1281 } 1282 } 1283 wait_cmd(dev, dma, 100, "i596 interrupt, timeout"); 1284 dma->scb.command = SWAP16(ack_cmd); 1285 DMA_WBACK(dev, &dma->scb, sizeof(struct i596_scb)); 1286 1287 /* DANGER: I suspect that some kind of interrupt 1288 acknowledgement aside from acking the 82596 might be needed 1289 here... but it's running acceptably without */ 1290 1291 ca(dev); 1292 1293 wait_cmd(dev, dma, 100, "i596 interrupt, exit timeout"); 1294 DEB(DEB_INTS, printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name)); 1295 1296 spin_unlock (&lp->lock); 1297 return IRQ_HANDLED; 1298 } 1299 1300 static int i596_close(struct net_device *dev) 1301 { 1302 struct i596_private *lp = netdev_priv(dev); 1303 unsigned long flags; 1304 1305 netif_stop_queue(dev); 1306 1307 DEB(DEB_INIT, 1308 printk(KERN_DEBUG 1309 "%s: Shutting down ethercard, status was %4.4x.\n", 1310 dev->name, SWAP16(lp->dma->scb.status))); 1311 1312 spin_lock_irqsave(&lp->lock, flags); 1313 1314 wait_cmd(dev, lp->dma, 100, "close1 timed out"); 1315 lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT); 1316 DMA_WBACK(dev, &lp->dma->scb, sizeof(struct i596_scb)); 1317 1318 ca(dev); 1319 1320 wait_cmd(dev, lp->dma, 100, "close2 timed out"); 1321 spin_unlock_irqrestore(&lp->lock, flags); 1322 DEB(DEB_STRUCT, i596_display_data(dev)); 1323 i596_cleanup_cmd(dev, lp); 1324 1325 free_irq(dev->irq, dev); 1326 remove_rx_bufs(dev); 1327 1328 return 0; 1329 } 1330 1331 /* 1332 * Set or clear the multicast filter for this adaptor. 1333 */ 1334 1335 static void set_multicast_list(struct net_device *dev) 1336 { 1337 struct i596_private *lp = netdev_priv(dev); 1338 struct i596_dma *dma = lp->dma; 1339 int config = 0, cnt; 1340 1341 DEB(DEB_MULTI, 1342 printk(KERN_DEBUG 1343 "%s: set multicast list, %d entries, promisc %s, allmulti %s\n", 1344 dev->name, netdev_mc_count(dev), 1345 dev->flags & IFF_PROMISC ? "ON" : "OFF", 1346 dev->flags & IFF_ALLMULTI ? "ON" : "OFF")); 1347 1348 if ((dev->flags & IFF_PROMISC) && 1349 !(dma->cf_cmd.i596_config[8] & 0x01)) { 1350 dma->cf_cmd.i596_config[8] |= 0x01; 1351 config = 1; 1352 } 1353 if (!(dev->flags & IFF_PROMISC) && 1354 (dma->cf_cmd.i596_config[8] & 0x01)) { 1355 dma->cf_cmd.i596_config[8] &= ~0x01; 1356 config = 1; 1357 } 1358 if ((dev->flags & IFF_ALLMULTI) && 1359 (dma->cf_cmd.i596_config[11] & 0x20)) { 1360 dma->cf_cmd.i596_config[11] &= ~0x20; 1361 config = 1; 1362 } 1363 if (!(dev->flags & IFF_ALLMULTI) && 1364 !(dma->cf_cmd.i596_config[11] & 0x20)) { 1365 dma->cf_cmd.i596_config[11] |= 0x20; 1366 config = 1; 1367 } 1368 if (config) { 1369 if (dma->cf_cmd.cmd.command) 1370 printk(KERN_INFO 1371 "%s: config change request already queued\n", 1372 dev->name); 1373 else { 1374 dma->cf_cmd.cmd.command = SWAP16(CmdConfigure); 1375 DMA_WBACK_INV(dev, &dma->cf_cmd, sizeof(struct cf_cmd)); 1376 i596_add_cmd(dev, &dma->cf_cmd.cmd); 1377 } 1378 } 1379 1380 cnt = netdev_mc_count(dev); 1381 if (cnt > MAX_MC_CNT) { 1382 cnt = MAX_MC_CNT; 1383 printk(KERN_NOTICE "%s: Only %d multicast addresses supported", 1384 dev->name, cnt); 1385 } 1386 1387 if (!netdev_mc_empty(dev)) { 1388 struct netdev_hw_addr *ha; 1389 unsigned char *cp; 1390 struct mc_cmd *cmd; 1391 1392 cmd = &dma->mc_cmd; 1393 cmd->cmd.command = SWAP16(CmdMulticastList); 1394 cmd->mc_cnt = SWAP16(netdev_mc_count(dev) * 6); 1395 cp = cmd->mc_addrs; 1396 netdev_for_each_mc_addr(ha, dev) { 1397 if (!cnt--) 1398 break; 1399 memcpy(cp, ha->addr, ETH_ALEN); 1400 if (i596_debug > 1) 1401 DEB(DEB_MULTI, 1402 printk(KERN_DEBUG 1403 "%s: Adding address %pM\n", 1404 dev->name, cp)); 1405 cp += ETH_ALEN; 1406 } 1407 DMA_WBACK_INV(dev, &dma->mc_cmd, sizeof(struct mc_cmd)); 1408 i596_add_cmd(dev, &cmd->cmd); 1409 } 1410 } 1411