1// SPDX-License-Identifier: GPL-1.0+ 2/* lasi_82596.c -- driver for the intel 82596 ethernet controller, as 3 munged into HPPA boxen . 4 5 This driver is based upon 82596.c, original credits are below... 6 but there were too many hoops which HP wants jumped through to 7 keep this code in there in a sane manner. 8 9 3 primary sources of the mess -- 10 1) hppa needs *lots* of cacheline flushing to keep this kind of 11 MMIO running. 12 13 2) The 82596 needs to see all of its pointers as their physical 14 address. Thus virt_to_bus/bus_to_virt are *everywhere*. 15 16 3) The implementation HP is using seems to be significantly pickier 17 about when and how the command and RX units are started. some 18 command ordering was changed. 19 20 Examination of the mach driver leads one to believe that there 21 might be a saner way to pull this off... anyone who feels like a 22 full rewrite can be my guest. 23 24 Split 02/13/2000 Sam Creasey (sammy@oh.verio.com) 25 26 02/01/2000 Initial modifications for parisc by Helge Deller (deller@gmx.de) 27 03/02/2000 changes for better/correct(?) cache-flushing (deller) 28*/ 29 30/* 82596.c: A generic 82596 ethernet driver for linux. */ 31/* 32 Based on Apricot.c 33 Written 1994 by Mark Evans. 34 This driver is for the Apricot 82596 bus-master interface 35 36 Modularised 12/94 Mark Evans 37 38 39 Modified to support the 82596 ethernet chips on 680x0 VME boards. 40 by Richard Hirst <richard@sleepie.demon.co.uk> 41 Renamed to be 82596.c 42 43 980825: Changed to receive directly in to sk_buffs which are 44 allocated at open() time. Eliminates copy on incoming frames 45 (small ones are still copied). Shared data now held in a 46 non-cached page, so we can run on 68060 in copyback mode. 47 48 TBD: 49 * look at deferring rx frames rather than discarding (as per tulip) 50 * handle tx ring full as per tulip 51 * performance test to tune rx_copybreak 52 53 Most of my modifications relate to the braindead big-endian 54 implementation by Intel. When the i596 is operating in 55 'big-endian' mode, it thinks a 32 bit value of 0x12345678 56 should be stored as 0x56781234. This is a real pain, when 57 you have linked lists which are shared by the 680x0 and the 58 i596. 59 60 Driver skeleton 61 Written 1993 by Donald Becker. 62 Copyright 1993 United States Government as represented by the Director, 63 National Security Agency. 64 65 The author may be reached as becker@scyld.com, or C/O 66 Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403 67 68 */ 69 70#include <linux/module.h> 71#include <linux/kernel.h> 72#include <linux/string.h> 73#include <linux/errno.h> 74#include <linux/ioport.h> 75#include <linux/interrupt.h> 76#include <linux/delay.h> 77#include <linux/netdevice.h> 78#include <linux/etherdevice.h> 79#include <linux/skbuff.h> 80#include <linux/types.h> 81#include <linux/bitops.h> 82#include <linux/dma-mapping.h> 83#include <linux/io.h> 84#include <linux/irq.h> 85#include <linux/gfp.h> 86 87/* DEBUG flags 88 */ 89 90#define DEB_INIT 0x0001 91#define DEB_PROBE 0x0002 92#define DEB_SERIOUS 0x0004 93#define DEB_ERRORS 0x0008 94#define DEB_MULTI 0x0010 95#define DEB_TDR 0x0020 96#define DEB_OPEN 0x0040 97#define DEB_RESET 0x0080 98#define DEB_ADDCMD 0x0100 99#define DEB_STATUS 0x0200 100#define DEB_STARTTX 0x0400 101#define DEB_RXADDR 0x0800 102#define DEB_TXADDR 0x1000 103#define DEB_RXFRAME 0x2000 104#define DEB_INTS 0x4000 105#define DEB_STRUCT 0x8000 106#define DEB_ANY 0xffff 107 108 109#define DEB(x, y) if (i596_debug & (x)) { y; } 110 111 112/* 113 * The MPU_PORT command allows direct access to the 82596. With PORT access 114 * the following commands are available (p5-18). The 32-bit port command 115 * must be word-swapped with the most significant word written first. 116 * This only applies to VME boards. 117 */ 118#define PORT_RESET 0x00 /* reset 82596 */ 119#define PORT_SELFTEST 0x01 /* selftest */ 120#define PORT_ALTSCP 0x02 /* alternate SCB address */ 121#define PORT_ALTDUMP 0x03 /* Alternate DUMP address */ 122 123static int i596_debug = (DEB_SERIOUS|DEB_PROBE); 124 125/* Copy frames shorter than rx_copybreak, otherwise pass on up in 126 * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha). 127 */ 128static int rx_copybreak = 100; 129 130#define PKT_BUF_SZ 1536 131#define MAX_MC_CNT 64 132 133#define ISCP_BUSY 0x0001 134 135#define I596_NULL ((u32)0xffffffff) 136 137#define CMD_EOL 0x8000 /* The last command of the list, stop. */ 138#define CMD_SUSP 0x4000 /* Suspend after doing cmd. */ 139#define CMD_INTR 0x2000 /* Interrupt after doing cmd. */ 140 141#define CMD_FLEX 0x0008 /* Enable flexible memory model */ 142 143enum commands { 144 CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3, 145 CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7 146}; 147 148#define STAT_C 0x8000 /* Set to 0 after execution */ 149#define STAT_B 0x4000 /* Command being executed */ 150#define STAT_OK 0x2000 /* Command executed ok */ 151#define STAT_A 0x1000 /* Command aborted */ 152 153#define CUC_START 0x0100 154#define CUC_RESUME 0x0200 155#define CUC_SUSPEND 0x0300 156#define CUC_ABORT 0x0400 157#define RX_START 0x0010 158#define RX_RESUME 0x0020 159#define RX_SUSPEND 0x0030 160#define RX_ABORT 0x0040 161 162#define TX_TIMEOUT (HZ/20) 163 164 165struct i596_reg { 166 unsigned short porthi; 167 unsigned short portlo; 168 u32 ca; 169}; 170 171#define EOF 0x8000 172#define SIZE_MASK 0x3fff 173 174struct i596_tbd { 175 unsigned short size; 176 unsigned short pad; 177 u32 next; 178 u32 data; 179 u32 cache_pad[5]; /* Total 32 bytes... */ 180}; 181 182/* The command structure has two 'next' pointers; v_next is the address of 183 * the next command as seen by the CPU, b_next is the address of the next 184 * command as seen by the 82596. The b_next pointer, as used by the 82596 185 * always references the status field of the next command, rather than the 186 * v_next field, because the 82596 is unaware of v_next. It may seem more 187 * logical to put v_next at the end of the structure, but we cannot do that 188 * because the 82596 expects other fields to be there, depending on command 189 * type. 190 */ 191 192struct i596_cmd { 193 struct i596_cmd *v_next; /* Address from CPUs viewpoint */ 194 unsigned short status; 195 unsigned short command; 196 u32 b_next; /* Address from i596 viewpoint */ 197}; 198 199struct tx_cmd { 200 struct i596_cmd cmd; 201 u32 tbd; 202 unsigned short size; 203 unsigned short pad; 204 struct sk_buff *skb; /* So we can free it after tx */ 205 dma_addr_t dma_addr; 206#ifdef __LP64__ 207 u32 cache_pad[6]; /* Total 64 bytes... */ 208#else 209 u32 cache_pad[1]; /* Total 32 bytes... */ 210#endif 211}; 212 213struct tdr_cmd { 214 struct i596_cmd cmd; 215 unsigned short status; 216 unsigned short pad; 217}; 218 219struct mc_cmd { 220 struct i596_cmd cmd; 221 short mc_cnt; 222 char mc_addrs[MAX_MC_CNT*6]; 223}; 224 225struct sa_cmd { 226 struct i596_cmd cmd; 227 char eth_addr[8]; 228}; 229 230struct cf_cmd { 231 struct i596_cmd cmd; 232 char i596_config[16]; 233}; 234 235struct i596_rfd { 236 unsigned short stat; 237 unsigned short cmd; 238 u32 b_next; /* Address from i596 viewpoint */ 239 u32 rbd; 240 unsigned short count; 241 unsigned short size; 242 struct i596_rfd *v_next; /* Address from CPUs viewpoint */ 243 struct i596_rfd *v_prev; 244#ifndef __LP64__ 245 u32 cache_pad[2]; /* Total 32 bytes... */ 246#endif 247}; 248 249struct i596_rbd { 250 /* hardware data */ 251 unsigned short count; 252 unsigned short zero1; 253 u32 b_next; 254 u32 b_data; /* Address from i596 viewpoint */ 255 unsigned short size; 256 unsigned short zero2; 257 /* driver data */ 258 struct sk_buff *skb; 259 struct i596_rbd *v_next; 260 u32 b_addr; /* This rbd addr from i596 view */ 261 unsigned char *v_data; /* Address from CPUs viewpoint */ 262 /* Total 32 bytes... */ 263#ifdef __LP64__ 264 u32 cache_pad[4]; 265#endif 266}; 267 268/* These values as chosen so struct i596_dma fits in one page... */ 269 270#define TX_RING_SIZE 32 271#define RX_RING_SIZE 16 272 273struct i596_scb { 274 unsigned short status; 275 unsigned short command; 276 u32 cmd; 277 u32 rfd; 278 u32 crc_err; 279 u32 align_err; 280 u32 resource_err; 281 u32 over_err; 282 u32 rcvdt_err; 283 u32 short_err; 284 unsigned short t_on; 285 unsigned short t_off; 286}; 287 288struct i596_iscp { 289 u32 stat; 290 u32 scb; 291}; 292 293struct i596_scp { 294 u32 sysbus; 295 u32 pad; 296 u32 iscp; 297}; 298 299struct i596_dma { 300 struct i596_scp scp __attribute__((aligned(32))); 301 volatile struct i596_iscp iscp __attribute__((aligned(32))); 302 volatile struct i596_scb scb __attribute__((aligned(32))); 303 struct sa_cmd sa_cmd __attribute__((aligned(32))); 304 struct cf_cmd cf_cmd __attribute__((aligned(32))); 305 struct tdr_cmd tdr_cmd __attribute__((aligned(32))); 306 struct mc_cmd mc_cmd __attribute__((aligned(32))); 307 struct i596_rfd rfds[RX_RING_SIZE] __attribute__((aligned(32))); 308 struct i596_rbd rbds[RX_RING_SIZE] __attribute__((aligned(32))); 309 struct tx_cmd tx_cmds[TX_RING_SIZE] __attribute__((aligned(32))); 310 struct i596_tbd tbds[TX_RING_SIZE] __attribute__((aligned(32))); 311}; 312 313struct i596_private { 314 struct i596_dma *dma; 315 u32 stat; 316 int last_restart; 317 struct i596_rfd *rfd_head; 318 struct i596_rbd *rbd_head; 319 struct i596_cmd *cmd_tail; 320 struct i596_cmd *cmd_head; 321 int cmd_backlog; 322 u32 last_cmd; 323 int next_tx_cmd; 324 int options; 325 spinlock_t lock; /* serialize access to chip */ 326 dma_addr_t dma_addr; 327 void __iomem *mpu_port; 328 void __iomem *ca; 329}; 330 331static const char init_setup[] = 332{ 333 0x8E, /* length, prefetch on */ 334 0xC8, /* fifo to 8, monitor off */ 335 0x80, /* don't save bad frames */ 336 0x2E, /* No source address insertion, 8 byte preamble */ 337 0x00, /* priority and backoff defaults */ 338 0x60, /* interframe spacing */ 339 0x00, /* slot time LSB */ 340 0xf2, /* slot time and retries */ 341 0x00, /* promiscuous mode */ 342 0x00, /* collision detect */ 343 0x40, /* minimum frame length */ 344 0xff, 345 0x00, 346 0x7f /* *multi IA */ }; 347 348static int i596_open(struct net_device *dev); 349static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev); 350static irqreturn_t i596_interrupt(int irq, void *dev_id); 351static int i596_close(struct net_device *dev); 352static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd); 353static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue); 354static void print_eth(unsigned char *buf, char *str); 355static void set_multicast_list(struct net_device *dev); 356static inline void ca(struct net_device *dev); 357static void mpu_port(struct net_device *dev, int c, dma_addr_t x); 358 359static int rx_ring_size = RX_RING_SIZE; 360static int ticks_limit = 100; 361static int max_cmd_backlog = TX_RING_SIZE-1; 362 363#ifdef CONFIG_NET_POLL_CONTROLLER 364static void i596_poll_controller(struct net_device *dev); 365#endif 366 367static inline dma_addr_t virt_to_dma(struct i596_private *lp, volatile void *v) 368{ 369 return lp->dma_addr + ((unsigned long)v - (unsigned long)lp->dma); 370} 371 372#ifdef NONCOHERENT_DMA 373static inline void dma_sync_dev(struct net_device *ndev, volatile void *addr, 374 size_t len) 375{ 376 dma_sync_single_for_device(ndev->dev.parent, 377 virt_to_dma(netdev_priv(ndev), addr), len, 378 DMA_BIDIRECTIONAL); 379} 380 381static inline void dma_sync_cpu(struct net_device *ndev, volatile void *addr, 382 size_t len) 383{ 384 dma_sync_single_for_cpu(ndev->dev.parent, 385 virt_to_dma(netdev_priv(ndev), addr), len, 386 DMA_BIDIRECTIONAL); 387} 388#else 389static inline void dma_sync_dev(struct net_device *ndev, volatile void *addr, 390 size_t len) 391{ 392} 393static inline void dma_sync_cpu(struct net_device *ndev, volatile void *addr, 394 size_t len) 395{ 396} 397#endif /* NONCOHERENT_DMA */ 398 399static inline int wait_istat(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str) 400{ 401 dma_sync_cpu(dev, &(dma->iscp), sizeof(struct i596_iscp)); 402 while (--delcnt && dma->iscp.stat) { 403 udelay(10); 404 dma_sync_cpu(dev, &(dma->iscp), sizeof(struct i596_iscp)); 405 } 406 if (!delcnt) { 407 printk(KERN_ERR "%s: %s, iscp.stat %04x, didn't clear\n", 408 dev->name, str, SWAP16(dma->iscp.stat)); 409 return -1; 410 } else 411 return 0; 412} 413 414 415static inline int wait_cmd(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str) 416{ 417 dma_sync_cpu(dev, &(dma->scb), sizeof(struct i596_scb)); 418 while (--delcnt && dma->scb.command) { 419 udelay(10); 420 dma_sync_cpu(dev, &(dma->scb), sizeof(struct i596_scb)); 421 } 422 if (!delcnt) { 423 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n", 424 dev->name, str, 425 SWAP16(dma->scb.status), 426 SWAP16(dma->scb.command)); 427 return -1; 428 } else 429 return 0; 430} 431 432 433static void i596_display_data(struct net_device *dev) 434{ 435 struct i596_private *lp = netdev_priv(dev); 436 struct i596_dma *dma = lp->dma; 437 struct i596_cmd *cmd; 438 struct i596_rfd *rfd; 439 struct i596_rbd *rbd; 440 441 printk(KERN_DEBUG "lp and scp at %p, .sysbus = %08x, .iscp = %08x\n", 442 &dma->scp, dma->scp.sysbus, SWAP32(dma->scp.iscp)); 443 printk(KERN_DEBUG "iscp at %p, iscp.stat = %08x, .scb = %08x\n", 444 &dma->iscp, SWAP32(dma->iscp.stat), SWAP32(dma->iscp.scb)); 445 printk(KERN_DEBUG "scb at %p, scb.status = %04x, .command = %04x," 446 " .cmd = %08x, .rfd = %08x\n", 447 &dma->scb, SWAP16(dma->scb.status), SWAP16(dma->scb.command), 448 SWAP16(dma->scb.cmd), SWAP32(dma->scb.rfd)); 449 printk(KERN_DEBUG " errors: crc %x, align %x, resource %x," 450 " over %x, rcvdt %x, short %x\n", 451 SWAP32(dma->scb.crc_err), SWAP32(dma->scb.align_err), 452 SWAP32(dma->scb.resource_err), SWAP32(dma->scb.over_err), 453 SWAP32(dma->scb.rcvdt_err), SWAP32(dma->scb.short_err)); 454 cmd = lp->cmd_head; 455 while (cmd != NULL) { 456 printk(KERN_DEBUG 457 "cmd at %p, .status = %04x, .command = %04x," 458 " .b_next = %08x\n", 459 cmd, SWAP16(cmd->status), SWAP16(cmd->command), 460 SWAP32(cmd->b_next)); 461 cmd = cmd->v_next; 462 } 463 rfd = lp->rfd_head; 464 printk(KERN_DEBUG "rfd_head = %p\n", rfd); 465 do { 466 printk(KERN_DEBUG 467 " %p .stat %04x, .cmd %04x, b_next %08x, rbd %08x," 468 " count %04x\n", 469 rfd, SWAP16(rfd->stat), SWAP16(rfd->cmd), 470 SWAP32(rfd->b_next), SWAP32(rfd->rbd), 471 SWAP16(rfd->count)); 472 rfd = rfd->v_next; 473 } while (rfd != lp->rfd_head); 474 rbd = lp->rbd_head; 475 printk(KERN_DEBUG "rbd_head = %p\n", rbd); 476 do { 477 printk(KERN_DEBUG 478 " %p .count %04x, b_next %08x, b_data %08x," 479 " size %04x\n", 480 rbd, SWAP16(rbd->count), SWAP32(rbd->b_next), 481 SWAP32(rbd->b_data), SWAP16(rbd->size)); 482 rbd = rbd->v_next; 483 } while (rbd != lp->rbd_head); 484 dma_sync_cpu(dev, dma, sizeof(struct i596_dma)); 485} 486 487static inline int init_rx_bufs(struct net_device *dev) 488{ 489 struct i596_private *lp = netdev_priv(dev); 490 struct i596_dma *dma = lp->dma; 491 int i; 492 struct i596_rfd *rfd; 493 struct i596_rbd *rbd; 494 495 /* First build the Receive Buffer Descriptor List */ 496 497 for (i = 0, rbd = dma->rbds; i < rx_ring_size; i++, rbd++) { 498 dma_addr_t dma_addr; 499 struct sk_buff *skb; 500 501 skb = netdev_alloc_skb_ip_align(dev, PKT_BUF_SZ); 502 if (skb == NULL) 503 return -1; 504 dma_addr = dma_map_single(dev->dev.parent, skb->data, 505 PKT_BUF_SZ, DMA_FROM_DEVICE); 506 rbd->v_next = rbd+1; 507 rbd->b_next = SWAP32(virt_to_dma(lp, rbd+1)); 508 rbd->b_addr = SWAP32(virt_to_dma(lp, rbd)); 509 rbd->skb = skb; 510 rbd->v_data = skb->data; 511 rbd->b_data = SWAP32(dma_addr); 512 rbd->size = SWAP16(PKT_BUF_SZ); 513 } 514 lp->rbd_head = dma->rbds; 515 rbd = dma->rbds + rx_ring_size - 1; 516 rbd->v_next = dma->rbds; 517 rbd->b_next = SWAP32(virt_to_dma(lp, dma->rbds)); 518 519 /* Now build the Receive Frame Descriptor List */ 520 521 for (i = 0, rfd = dma->rfds; i < rx_ring_size; i++, rfd++) { 522 rfd->rbd = I596_NULL; 523 rfd->v_next = rfd+1; 524 rfd->v_prev = rfd-1; 525 rfd->b_next = SWAP32(virt_to_dma(lp, rfd+1)); 526 rfd->cmd = SWAP16(CMD_FLEX); 527 } 528 lp->rfd_head = dma->rfds; 529 dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); 530 rfd = dma->rfds; 531 rfd->rbd = SWAP32(virt_to_dma(lp, lp->rbd_head)); 532 rfd->v_prev = dma->rfds + rx_ring_size - 1; 533 rfd = dma->rfds + rx_ring_size - 1; 534 rfd->v_next = dma->rfds; 535 rfd->b_next = SWAP32(virt_to_dma(lp, dma->rfds)); 536 rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX); 537 538 dma_sync_dev(dev, dma, sizeof(struct i596_dma)); 539 return 0; 540} 541 542static inline void remove_rx_bufs(struct net_device *dev) 543{ 544 struct i596_private *lp = netdev_priv(dev); 545 struct i596_rbd *rbd; 546 int i; 547 548 for (i = 0, rbd = lp->dma->rbds; i < rx_ring_size; i++, rbd++) { 549 if (rbd->skb == NULL) 550 break; 551 dma_unmap_single(dev->dev.parent, 552 (dma_addr_t)SWAP32(rbd->b_data), 553 PKT_BUF_SZ, DMA_FROM_DEVICE); 554 dev_kfree_skb(rbd->skb); 555 } 556} 557 558 559static void rebuild_rx_bufs(struct net_device *dev) 560{ 561 struct i596_private *lp = netdev_priv(dev); 562 struct i596_dma *dma = lp->dma; 563 int i; 564 565 /* Ensure rx frame/buffer descriptors are tidy */ 566 567 for (i = 0; i < rx_ring_size; i++) { 568 dma->rfds[i].rbd = I596_NULL; 569 dma->rfds[i].cmd = SWAP16(CMD_FLEX); 570 } 571 dma->rfds[rx_ring_size-1].cmd = SWAP16(CMD_EOL|CMD_FLEX); 572 lp->rfd_head = dma->rfds; 573 dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); 574 lp->rbd_head = dma->rbds; 575 dma->rfds[0].rbd = SWAP32(virt_to_dma(lp, dma->rbds)); 576 577 dma_sync_dev(dev, dma, sizeof(struct i596_dma)); 578} 579 580 581static int init_i596_mem(struct net_device *dev) 582{ 583 struct i596_private *lp = netdev_priv(dev); 584 struct i596_dma *dma = lp->dma; 585 unsigned long flags; 586 587 mpu_port(dev, PORT_RESET, 0); 588 udelay(100); /* Wait 100us - seems to help */ 589 590 /* change the scp address */ 591 592 lp->last_cmd = jiffies; 593 594 dma->scp.sysbus = SYSBUS; 595 dma->scp.iscp = SWAP32(virt_to_dma(lp, &(dma->iscp))); 596 dma->iscp.scb = SWAP32(virt_to_dma(lp, &(dma->scb))); 597 dma->iscp.stat = SWAP32(ISCP_BUSY); 598 lp->cmd_backlog = 0; 599 600 lp->cmd_head = NULL; 601 dma->scb.cmd = I596_NULL; 602 603 DEB(DEB_INIT, printk(KERN_DEBUG "%s: starting i82596.\n", dev->name)); 604 605 dma_sync_dev(dev, &(dma->scp), sizeof(struct i596_scp)); 606 dma_sync_dev(dev, &(dma->iscp), sizeof(struct i596_iscp)); 607 dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb)); 608 609 mpu_port(dev, PORT_ALTSCP, virt_to_dma(lp, &dma->scp)); 610 ca(dev); 611 if (wait_istat(dev, dma, 1000, "initialization timed out")) 612 goto failed; 613 DEB(DEB_INIT, printk(KERN_DEBUG 614 "%s: i82596 initialization successful\n", 615 dev->name)); 616 617 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) { 618 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq); 619 goto failed; 620 } 621 622 /* Ensure rx frame/buffer descriptors are tidy */ 623 rebuild_rx_bufs(dev); 624 625 dma->scb.command = 0; 626 dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb)); 627 628 DEB(DEB_INIT, printk(KERN_DEBUG 629 "%s: queuing CmdConfigure\n", dev->name)); 630 memcpy(dma->cf_cmd.i596_config, init_setup, 14); 631 dma->cf_cmd.cmd.command = SWAP16(CmdConfigure); 632 dma_sync_dev(dev, &(dma->cf_cmd), sizeof(struct cf_cmd)); 633 i596_add_cmd(dev, &dma->cf_cmd.cmd); 634 635 DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name)); 636 memcpy(dma->sa_cmd.eth_addr, dev->dev_addr, ETH_ALEN); 637 dma->sa_cmd.cmd.command = SWAP16(CmdSASetup); 638 dma_sync_dev(dev, &(dma->sa_cmd), sizeof(struct sa_cmd)); 639 i596_add_cmd(dev, &dma->sa_cmd.cmd); 640 641 DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name)); 642 dma->tdr_cmd.cmd.command = SWAP16(CmdTDR); 643 dma_sync_dev(dev, &(dma->tdr_cmd), sizeof(struct tdr_cmd)); 644 i596_add_cmd(dev, &dma->tdr_cmd.cmd); 645 646 spin_lock_irqsave (&lp->lock, flags); 647 648 if (wait_cmd(dev, dma, 1000, "timed out waiting to issue RX_START")) { 649 spin_unlock_irqrestore (&lp->lock, flags); 650 goto failed_free_irq; 651 } 652 DEB(DEB_INIT, printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name)); 653 dma->scb.command = SWAP16(RX_START); 654 dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); 655 dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb)); 656 657 ca(dev); 658 659 spin_unlock_irqrestore (&lp->lock, flags); 660 if (wait_cmd(dev, dma, 1000, "RX_START not processed")) 661 goto failed_free_irq; 662 DEB(DEB_INIT, printk(KERN_DEBUG 663 "%s: Receive unit started OK\n", dev->name)); 664 return 0; 665 666failed_free_irq: 667 free_irq(dev->irq, dev); 668failed: 669 printk(KERN_ERR "%s: Failed to initialise 82596\n", dev->name); 670 mpu_port(dev, PORT_RESET, 0); 671 return -1; 672} 673 674 675static inline int i596_rx(struct net_device *dev) 676{ 677 struct i596_private *lp = netdev_priv(dev); 678 struct i596_rfd *rfd; 679 struct i596_rbd *rbd; 680 int frames = 0; 681 682 DEB(DEB_RXFRAME, printk(KERN_DEBUG 683 "i596_rx(), rfd_head %p, rbd_head %p\n", 684 lp->rfd_head, lp->rbd_head)); 685 686 687 rfd = lp->rfd_head; /* Ref next frame to check */ 688 689 dma_sync_cpu(dev, rfd, sizeof(struct i596_rfd)); 690 while (rfd->stat & SWAP16(STAT_C)) { /* Loop while complete frames */ 691 if (rfd->rbd == I596_NULL) 692 rbd = NULL; 693 else if (rfd->rbd == lp->rbd_head->b_addr) { 694 rbd = lp->rbd_head; 695 dma_sync_cpu(dev, rbd, sizeof(struct i596_rbd)); 696 } else { 697 printk(KERN_ERR "%s: rbd chain broken!\n", dev->name); 698 /* XXX Now what? */ 699 rbd = NULL; 700 } 701 DEB(DEB_RXFRAME, printk(KERN_DEBUG 702 " rfd %p, rfd.rbd %08x, rfd.stat %04x\n", 703 rfd, rfd->rbd, rfd->stat)); 704 705 if (rbd != NULL && (rfd->stat & SWAP16(STAT_OK))) { 706 /* a good frame */ 707 int pkt_len = SWAP16(rbd->count) & 0x3fff; 708 struct sk_buff *skb = rbd->skb; 709 int rx_in_place = 0; 710 711 DEB(DEB_RXADDR, print_eth(rbd->v_data, "received")); 712 frames++; 713 714 /* Check if the packet is long enough to just accept 715 * without copying to a properly sized skbuff. 716 */ 717 718 if (pkt_len > rx_copybreak) { 719 struct sk_buff *newskb; 720 dma_addr_t dma_addr; 721 722 dma_unmap_single(dev->dev.parent, 723 (dma_addr_t)SWAP32(rbd->b_data), 724 PKT_BUF_SZ, DMA_FROM_DEVICE); 725 /* Get fresh skbuff to replace filled one. */ 726 newskb = netdev_alloc_skb_ip_align(dev, 727 PKT_BUF_SZ); 728 if (newskb == NULL) { 729 skb = NULL; /* drop pkt */ 730 goto memory_squeeze; 731 } 732 733 /* Pass up the skb already on the Rx ring. */ 734 skb_put(skb, pkt_len); 735 rx_in_place = 1; 736 rbd->skb = newskb; 737 dma_addr = dma_map_single(dev->dev.parent, 738 newskb->data, 739 PKT_BUF_SZ, 740 DMA_FROM_DEVICE); 741 rbd->v_data = newskb->data; 742 rbd->b_data = SWAP32(dma_addr); 743 dma_sync_dev(dev, rbd, sizeof(struct i596_rbd)); 744 } else { 745 skb = netdev_alloc_skb_ip_align(dev, pkt_len); 746 } 747memory_squeeze: 748 if (skb == NULL) { 749 /* XXX tulip.c can defer packets here!! */ 750 dev->stats.rx_dropped++; 751 } else { 752 if (!rx_in_place) { 753 /* 16 byte align the data fields */ 754 dma_sync_single_for_cpu(dev->dev.parent, 755 (dma_addr_t)SWAP32(rbd->b_data), 756 PKT_BUF_SZ, DMA_FROM_DEVICE); 757 skb_put_data(skb, rbd->v_data, 758 pkt_len); 759 dma_sync_single_for_device(dev->dev.parent, 760 (dma_addr_t)SWAP32(rbd->b_data), 761 PKT_BUF_SZ, DMA_FROM_DEVICE); 762 } 763 skb->len = pkt_len; 764 skb->protocol = eth_type_trans(skb, dev); 765 netif_rx(skb); 766 dev->stats.rx_packets++; 767 dev->stats.rx_bytes += pkt_len; 768 } 769 } else { 770 DEB(DEB_ERRORS, printk(KERN_DEBUG 771 "%s: Error, rfd.stat = 0x%04x\n", 772 dev->name, rfd->stat)); 773 dev->stats.rx_errors++; 774 if (rfd->stat & SWAP16(0x0100)) 775 dev->stats.collisions++; 776 if (rfd->stat & SWAP16(0x8000)) 777 dev->stats.rx_length_errors++; 778 if (rfd->stat & SWAP16(0x0001)) 779 dev->stats.rx_over_errors++; 780 if (rfd->stat & SWAP16(0x0002)) 781 dev->stats.rx_fifo_errors++; 782 if (rfd->stat & SWAP16(0x0004)) 783 dev->stats.rx_frame_errors++; 784 if (rfd->stat & SWAP16(0x0008)) 785 dev->stats.rx_crc_errors++; 786 if (rfd->stat & SWAP16(0x0010)) 787 dev->stats.rx_length_errors++; 788 } 789 790 /* Clear the buffer descriptor count and EOF + F flags */ 791 792 if (rbd != NULL && (rbd->count & SWAP16(0x4000))) { 793 rbd->count = 0; 794 lp->rbd_head = rbd->v_next; 795 dma_sync_dev(dev, rbd, sizeof(struct i596_rbd)); 796 } 797 798 /* Tidy the frame descriptor, marking it as end of list */ 799 800 rfd->rbd = I596_NULL; 801 rfd->stat = 0; 802 rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX); 803 rfd->count = 0; 804 805 /* Update record of next frame descriptor to process */ 806 807 lp->dma->scb.rfd = rfd->b_next; 808 lp->rfd_head = rfd->v_next; 809 dma_sync_dev(dev, rfd, sizeof(struct i596_rfd)); 810 811 /* Remove end-of-list from old end descriptor */ 812 813 rfd->v_prev->cmd = SWAP16(CMD_FLEX); 814 dma_sync_dev(dev, rfd->v_prev, sizeof(struct i596_rfd)); 815 rfd = lp->rfd_head; 816 dma_sync_cpu(dev, rfd, sizeof(struct i596_rfd)); 817 } 818 819 DEB(DEB_RXFRAME, printk(KERN_DEBUG "frames %d\n", frames)); 820 821 return 0; 822} 823 824 825static inline void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp) 826{ 827 struct i596_cmd *ptr; 828 829 while (lp->cmd_head != NULL) { 830 ptr = lp->cmd_head; 831 lp->cmd_head = ptr->v_next; 832 lp->cmd_backlog--; 833 834 switch (SWAP16(ptr->command) & 0x7) { 835 case CmdTx: 836 { 837 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; 838 struct sk_buff *skb = tx_cmd->skb; 839 dma_unmap_single(dev->dev.parent, 840 tx_cmd->dma_addr, 841 skb->len, DMA_TO_DEVICE); 842 843 dev_kfree_skb(skb); 844 845 dev->stats.tx_errors++; 846 dev->stats.tx_aborted_errors++; 847 848 ptr->v_next = NULL; 849 ptr->b_next = I596_NULL; 850 tx_cmd->cmd.command = 0; /* Mark as free */ 851 break; 852 } 853 default: 854 ptr->v_next = NULL; 855 ptr->b_next = I596_NULL; 856 } 857 dma_sync_dev(dev, ptr, sizeof(struct i596_cmd)); 858 } 859 860 wait_cmd(dev, lp->dma, 100, "i596_cleanup_cmd timed out"); 861 lp->dma->scb.cmd = I596_NULL; 862 dma_sync_dev(dev, &(lp->dma->scb), sizeof(struct i596_scb)); 863} 864 865 866static inline void i596_reset(struct net_device *dev, struct i596_private *lp) 867{ 868 unsigned long flags; 869 870 DEB(DEB_RESET, printk(KERN_DEBUG "i596_reset\n")); 871 872 spin_lock_irqsave (&lp->lock, flags); 873 874 wait_cmd(dev, lp->dma, 100, "i596_reset timed out"); 875 876 netif_stop_queue(dev); 877 878 /* FIXME: this command might cause an lpmc */ 879 lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT); 880 dma_sync_dev(dev, &(lp->dma->scb), sizeof(struct i596_scb)); 881 ca(dev); 882 883 /* wait for shutdown */ 884 wait_cmd(dev, lp->dma, 1000, "i596_reset 2 timed out"); 885 spin_unlock_irqrestore (&lp->lock, flags); 886 887 i596_cleanup_cmd(dev, lp); 888 i596_rx(dev); 889 890 netif_start_queue(dev); 891 init_i596_mem(dev); 892} 893 894 895static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) 896{ 897 struct i596_private *lp = netdev_priv(dev); 898 struct i596_dma *dma = lp->dma; 899 unsigned long flags; 900 901 DEB(DEB_ADDCMD, printk(KERN_DEBUG "i596_add_cmd cmd_head %p\n", 902 lp->cmd_head)); 903 904 cmd->status = 0; 905 cmd->command |= SWAP16(CMD_EOL | CMD_INTR); 906 cmd->v_next = NULL; 907 cmd->b_next = I596_NULL; 908 dma_sync_dev(dev, cmd, sizeof(struct i596_cmd)); 909 910 spin_lock_irqsave (&lp->lock, flags); 911 912 if (lp->cmd_head != NULL) { 913 lp->cmd_tail->v_next = cmd; 914 lp->cmd_tail->b_next = SWAP32(virt_to_dma(lp, &cmd->status)); 915 dma_sync_dev(dev, lp->cmd_tail, sizeof(struct i596_cmd)); 916 } else { 917 lp->cmd_head = cmd; 918 wait_cmd(dev, dma, 100, "i596_add_cmd timed out"); 919 dma->scb.cmd = SWAP32(virt_to_dma(lp, &cmd->status)); 920 dma->scb.command = SWAP16(CUC_START); 921 dma_sync_dev(dev, &(dma->scb), sizeof(struct i596_scb)); 922 ca(dev); 923 } 924 lp->cmd_tail = cmd; 925 lp->cmd_backlog++; 926 927 spin_unlock_irqrestore (&lp->lock, flags); 928 929 if (lp->cmd_backlog > max_cmd_backlog) { 930 unsigned long tickssofar = jiffies - lp->last_cmd; 931 932 if (tickssofar < ticks_limit) 933 return; 934 935 printk(KERN_ERR 936 "%s: command unit timed out, status resetting.\n", 937 dev->name); 938#if 1 939 i596_reset(dev, lp); 940#endif 941 } 942} 943 944static int i596_open(struct net_device *dev) 945{ 946 DEB(DEB_OPEN, printk(KERN_DEBUG 947 "%s: i596_open() irq %d.\n", dev->name, dev->irq)); 948 949 if (init_rx_bufs(dev)) { 950 printk(KERN_ERR "%s: Failed to init rx bufs\n", dev->name); 951 return -EAGAIN; 952 } 953 if (init_i596_mem(dev)) { 954 printk(KERN_ERR "%s: Failed to init memory\n", dev->name); 955 goto out_remove_rx_bufs; 956 } 957 netif_start_queue(dev); 958 959 return 0; 960 961out_remove_rx_bufs: 962 remove_rx_bufs(dev); 963 return -EAGAIN; 964} 965 966static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue) 967{ 968 struct i596_private *lp = netdev_priv(dev); 969 970 /* Transmitter timeout, serious problems. */ 971 DEB(DEB_ERRORS, printk(KERN_DEBUG 972 "%s: transmit timed out, status resetting.\n", 973 dev->name)); 974 975 dev->stats.tx_errors++; 976 977 /* Try to restart the adaptor */ 978 if (lp->last_restart == dev->stats.tx_packets) { 979 DEB(DEB_ERRORS, printk(KERN_DEBUG "Resetting board.\n")); 980 /* Shutdown and restart */ 981 i596_reset (dev, lp); 982 } else { 983 /* Issue a channel attention signal */ 984 DEB(DEB_ERRORS, printk(KERN_DEBUG "Kicking board.\n")); 985 lp->dma->scb.command = SWAP16(CUC_START | RX_START); 986 dma_sync_dev(dev, &(lp->dma->scb), sizeof(struct i596_scb)); 987 ca (dev); 988 lp->last_restart = dev->stats.tx_packets; 989 } 990 991 netif_trans_update(dev); /* prevent tx timeout */ 992 netif_wake_queue (dev); 993} 994 995 996static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev) 997{ 998 struct i596_private *lp = netdev_priv(dev); 999 struct tx_cmd *tx_cmd; 1000 struct i596_tbd *tbd; 1001 short length = skb->len; 1002 1003 DEB(DEB_STARTTX, printk(KERN_DEBUG 1004 "%s: i596_start_xmit(%x,%p) called\n", 1005 dev->name, skb->len, skb->data)); 1006 1007 if (length < ETH_ZLEN) { 1008 if (skb_padto(skb, ETH_ZLEN)) 1009 return NETDEV_TX_OK; 1010 length = ETH_ZLEN; 1011 } 1012 1013 netif_stop_queue(dev); 1014 1015 tx_cmd = lp->dma->tx_cmds + lp->next_tx_cmd; 1016 tbd = lp->dma->tbds + lp->next_tx_cmd; 1017 1018 if (tx_cmd->cmd.command) { 1019 DEB(DEB_ERRORS, printk(KERN_DEBUG 1020 "%s: xmit ring full, dropping packet.\n", 1021 dev->name)); 1022 dev->stats.tx_dropped++; 1023 1024 dev_kfree_skb_any(skb); 1025 } else { 1026 if (++lp->next_tx_cmd == TX_RING_SIZE) 1027 lp->next_tx_cmd = 0; 1028 tx_cmd->tbd = SWAP32(virt_to_dma(lp, tbd)); 1029 tbd->next = I596_NULL; 1030 1031 tx_cmd->cmd.command = SWAP16(CMD_FLEX | CmdTx); 1032 tx_cmd->skb = skb; 1033 1034 tx_cmd->pad = 0; 1035 tx_cmd->size = 0; 1036 tbd->pad = 0; 1037 tbd->size = SWAP16(EOF | length); 1038 1039 tx_cmd->dma_addr = dma_map_single(dev->dev.parent, skb->data, 1040 skb->len, DMA_TO_DEVICE); 1041 tbd->data = SWAP32(tx_cmd->dma_addr); 1042 1043 DEB(DEB_TXADDR, print_eth(skb->data, "tx-queued")); 1044 dma_sync_dev(dev, tx_cmd, sizeof(struct tx_cmd)); 1045 dma_sync_dev(dev, tbd, sizeof(struct i596_tbd)); 1046 i596_add_cmd(dev, &tx_cmd->cmd); 1047 1048 dev->stats.tx_packets++; 1049 dev->stats.tx_bytes += length; 1050 } 1051 1052 netif_start_queue(dev); 1053 1054 return NETDEV_TX_OK; 1055} 1056 1057static void print_eth(unsigned char *add, char *str) 1058{ 1059 printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n", 1060 add, add + 6, add, add[12], add[13], str); 1061} 1062static const struct net_device_ops i596_netdev_ops = { 1063 .ndo_open = i596_open, 1064 .ndo_stop = i596_close, 1065 .ndo_start_xmit = i596_start_xmit, 1066 .ndo_set_rx_mode = set_multicast_list, 1067 .ndo_tx_timeout = i596_tx_timeout, 1068 .ndo_validate_addr = eth_validate_addr, 1069 .ndo_set_mac_address = eth_mac_addr, 1070#ifdef CONFIG_NET_POLL_CONTROLLER 1071 .ndo_poll_controller = i596_poll_controller, 1072#endif 1073}; 1074 1075static int i82596_probe(struct net_device *dev) 1076{ 1077 struct i596_private *lp = netdev_priv(dev); 1078 int ret; 1079 1080 /* This lot is ensure things have been cache line aligned. */ 1081 BUILD_BUG_ON(sizeof(struct i596_rfd) != 32); 1082 BUILD_BUG_ON(sizeof(struct i596_rbd) & 31); 1083 BUILD_BUG_ON(sizeof(struct tx_cmd) & 31); 1084 BUILD_BUG_ON(sizeof(struct i596_tbd) != 32); 1085#ifndef __LP64__ 1086 BUILD_BUG_ON(sizeof(struct i596_dma) > 4096); 1087#endif 1088 1089 if (!dev->base_addr || !dev->irq) 1090 return -ENODEV; 1091 1092 dev->netdev_ops = &i596_netdev_ops; 1093 dev->watchdog_timeo = TX_TIMEOUT; 1094 1095 memset(lp->dma, 0, sizeof(struct i596_dma)); 1096 lp->dma->scb.command = 0; 1097 lp->dma->scb.cmd = I596_NULL; 1098 lp->dma->scb.rfd = I596_NULL; 1099 spin_lock_init(&lp->lock); 1100 1101 dma_sync_dev(dev, lp->dma, sizeof(struct i596_dma)); 1102 1103 ret = register_netdev(dev); 1104 if (ret) 1105 return ret; 1106 1107 DEB(DEB_PROBE, printk(KERN_INFO "%s: 82596 at %#3lx, %pM IRQ %d.\n", 1108 dev->name, dev->base_addr, dev->dev_addr, 1109 dev->irq)); 1110 DEB(DEB_INIT, printk(KERN_INFO 1111 "%s: dma at 0x%p (%d bytes), lp->scb at 0x%p\n", 1112 dev->name, lp->dma, (int)sizeof(struct i596_dma), 1113 &lp->dma->scb)); 1114 1115 return 0; 1116} 1117 1118#ifdef CONFIG_NET_POLL_CONTROLLER 1119static void i596_poll_controller(struct net_device *dev) 1120{ 1121 disable_irq(dev->irq); 1122 i596_interrupt(dev->irq, dev); 1123 enable_irq(dev->irq); 1124} 1125#endif 1126 1127static irqreturn_t i596_interrupt(int irq, void *dev_id) 1128{ 1129 struct net_device *dev = dev_id; 1130 struct i596_private *lp; 1131 struct i596_dma *dma; 1132 unsigned short status, ack_cmd = 0; 1133 1134 lp = netdev_priv(dev); 1135 dma = lp->dma; 1136 1137 spin_lock (&lp->lock); 1138 1139 wait_cmd(dev, dma, 100, "i596 interrupt, timeout"); 1140 status = SWAP16(dma->scb.status); 1141 1142 DEB(DEB_INTS, printk(KERN_DEBUG 1143 "%s: i596 interrupt, IRQ %d, status %4.4x.\n", 1144 dev->name, dev->irq, status)); 1145 1146 ack_cmd = status & 0xf000; 1147 1148 if (!ack_cmd) { 1149 DEB(DEB_ERRORS, printk(KERN_DEBUG 1150 "%s: interrupt with no events\n", 1151 dev->name)); 1152 spin_unlock (&lp->lock); 1153 return IRQ_NONE; 1154 } 1155 1156 if ((status & 0x8000) || (status & 0x2000)) { 1157 struct i596_cmd *ptr; 1158 1159 if ((status & 0x8000)) 1160 DEB(DEB_INTS, 1161 printk(KERN_DEBUG 1162 "%s: i596 interrupt completed command.\n", 1163 dev->name)); 1164 if ((status & 0x2000)) 1165 DEB(DEB_INTS, 1166 printk(KERN_DEBUG 1167 "%s: i596 interrupt command unit inactive %x.\n", 1168 dev->name, status & 0x0700)); 1169 1170 while (lp->cmd_head != NULL) { 1171 dma_sync_cpu(dev, lp->cmd_head, sizeof(struct i596_cmd)); 1172 if (!(lp->cmd_head->status & SWAP16(STAT_C))) 1173 break; 1174 1175 ptr = lp->cmd_head; 1176 1177 DEB(DEB_STATUS, 1178 printk(KERN_DEBUG 1179 "cmd_head->status = %04x, ->command = %04x\n", 1180 SWAP16(lp->cmd_head->status), 1181 SWAP16(lp->cmd_head->command))); 1182 lp->cmd_head = ptr->v_next; 1183 lp->cmd_backlog--; 1184 1185 switch (SWAP16(ptr->command) & 0x7) { 1186 case CmdTx: 1187 { 1188 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; 1189 struct sk_buff *skb = tx_cmd->skb; 1190 1191 if (ptr->status & SWAP16(STAT_OK)) { 1192 DEB(DEB_TXADDR, 1193 print_eth(skb->data, "tx-done")); 1194 } else { 1195 dev->stats.tx_errors++; 1196 if (ptr->status & SWAP16(0x0020)) 1197 dev->stats.collisions++; 1198 if (!(ptr->status & SWAP16(0x0040))) 1199 dev->stats.tx_heartbeat_errors++; 1200 if (ptr->status & SWAP16(0x0400)) 1201 dev->stats.tx_carrier_errors++; 1202 if (ptr->status & SWAP16(0x0800)) 1203 dev->stats.collisions++; 1204 if (ptr->status & SWAP16(0x1000)) 1205 dev->stats.tx_aborted_errors++; 1206 } 1207 dma_unmap_single(dev->dev.parent, 1208 tx_cmd->dma_addr, 1209 skb->len, DMA_TO_DEVICE); 1210 dev_consume_skb_irq(skb); 1211 1212 tx_cmd->cmd.command = 0; /* Mark free */ 1213 break; 1214 } 1215 case CmdTDR: 1216 { 1217 unsigned short status = SWAP16(((struct tdr_cmd *)ptr)->status); 1218 1219 if (status & 0x8000) { 1220 DEB(DEB_ANY, 1221 printk(KERN_DEBUG "%s: link ok.\n", 1222 dev->name)); 1223 } else { 1224 if (status & 0x4000) 1225 printk(KERN_ERR 1226 "%s: Transceiver problem.\n", 1227 dev->name); 1228 if (status & 0x2000) 1229 printk(KERN_ERR 1230 "%s: Termination problem.\n", 1231 dev->name); 1232 if (status & 0x1000) 1233 printk(KERN_ERR 1234 "%s: Short circuit.\n", 1235 dev->name); 1236 1237 DEB(DEB_TDR, 1238 printk(KERN_DEBUG "%s: Time %d.\n", 1239 dev->name, status & 0x07ff)); 1240 } 1241 break; 1242 } 1243 case CmdConfigure: 1244 /* 1245 * Zap command so set_multicast_list() know 1246 * it is free 1247 */ 1248 ptr->command = 0; 1249 break; 1250 } 1251 ptr->v_next = NULL; 1252 ptr->b_next = I596_NULL; 1253 dma_sync_dev(dev, ptr, sizeof(struct i596_cmd)); 1254 lp->last_cmd = jiffies; 1255 } 1256 1257 /* This mess is arranging that only the last of any outstanding 1258 * commands has the interrupt bit set. Should probably really 1259 * only add to the cmd queue when the CU is stopped. 1260 */ 1261 ptr = lp->cmd_head; 1262 while ((ptr != NULL) && (ptr != lp->cmd_tail)) { 1263 struct i596_cmd *prev = ptr; 1264 1265 ptr->command &= SWAP16(0x1fff); 1266 ptr = ptr->v_next; 1267 dma_sync_dev(dev, prev, sizeof(struct i596_cmd)); 1268 } 1269 1270 if (lp->cmd_head != NULL) 1271 ack_cmd |= CUC_START; 1272 dma->scb.cmd = SWAP32(virt_to_dma(lp, &lp->cmd_head->status)); 1273 dma_sync_dev(dev, &dma->scb, sizeof(struct i596_scb)); 1274 } 1275 if ((status & 0x1000) || (status & 0x4000)) { 1276 if ((status & 0x4000)) 1277 DEB(DEB_INTS, 1278 printk(KERN_DEBUG 1279 "%s: i596 interrupt received a frame.\n", 1280 dev->name)); 1281 i596_rx(dev); 1282 /* Only RX_START if stopped - RGH 07-07-96 */ 1283 if (status & 0x1000) { 1284 if (netif_running(dev)) { 1285 DEB(DEB_ERRORS, 1286 printk(KERN_DEBUG 1287 "%s: i596 interrupt receive unit inactive, status 0x%x\n", 1288 dev->name, status)); 1289 ack_cmd |= RX_START; 1290 dev->stats.rx_errors++; 1291 dev->stats.rx_fifo_errors++; 1292 rebuild_rx_bufs(dev); 1293 } 1294 } 1295 } 1296 wait_cmd(dev, dma, 100, "i596 interrupt, timeout"); 1297 dma->scb.command = SWAP16(ack_cmd); 1298 dma_sync_dev(dev, &dma->scb, sizeof(struct i596_scb)); 1299 1300 /* DANGER: I suspect that some kind of interrupt 1301 acknowledgement aside from acking the 82596 might be needed 1302 here... but it's running acceptably without */ 1303 1304 ca(dev); 1305 1306 wait_cmd(dev, dma, 100, "i596 interrupt, exit timeout"); 1307 DEB(DEB_INTS, printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name)); 1308 1309 spin_unlock (&lp->lock); 1310 return IRQ_HANDLED; 1311} 1312 1313static int i596_close(struct net_device *dev) 1314{ 1315 struct i596_private *lp = netdev_priv(dev); 1316 unsigned long flags; 1317 1318 netif_stop_queue(dev); 1319 1320 DEB(DEB_INIT, 1321 printk(KERN_DEBUG 1322 "%s: Shutting down ethercard, status was %4.4x.\n", 1323 dev->name, SWAP16(lp->dma->scb.status))); 1324 1325 spin_lock_irqsave(&lp->lock, flags); 1326 1327 wait_cmd(dev, lp->dma, 100, "close1 timed out"); 1328 lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT); 1329 dma_sync_dev(dev, &lp->dma->scb, sizeof(struct i596_scb)); 1330 1331 ca(dev); 1332 1333 wait_cmd(dev, lp->dma, 100, "close2 timed out"); 1334 spin_unlock_irqrestore(&lp->lock, flags); 1335 DEB(DEB_STRUCT, i596_display_data(dev)); 1336 i596_cleanup_cmd(dev, lp); 1337 1338 free_irq(dev->irq, dev); 1339 remove_rx_bufs(dev); 1340 1341 return 0; 1342} 1343 1344/* 1345 * Set or clear the multicast filter for this adaptor. 1346 */ 1347 1348static void set_multicast_list(struct net_device *dev) 1349{ 1350 struct i596_private *lp = netdev_priv(dev); 1351 struct i596_dma *dma = lp->dma; 1352 int config = 0, cnt; 1353 1354 DEB(DEB_MULTI, 1355 printk(KERN_DEBUG 1356 "%s: set multicast list, %d entries, promisc %s, allmulti %s\n", 1357 dev->name, netdev_mc_count(dev), 1358 dev->flags & IFF_PROMISC ? "ON" : "OFF", 1359 dev->flags & IFF_ALLMULTI ? "ON" : "OFF")); 1360 1361 if ((dev->flags & IFF_PROMISC) && 1362 !(dma->cf_cmd.i596_config[8] & 0x01)) { 1363 dma->cf_cmd.i596_config[8] |= 0x01; 1364 config = 1; 1365 } 1366 if (!(dev->flags & IFF_PROMISC) && 1367 (dma->cf_cmd.i596_config[8] & 0x01)) { 1368 dma->cf_cmd.i596_config[8] &= ~0x01; 1369 config = 1; 1370 } 1371 if ((dev->flags & IFF_ALLMULTI) && 1372 (dma->cf_cmd.i596_config[11] & 0x20)) { 1373 dma->cf_cmd.i596_config[11] &= ~0x20; 1374 config = 1; 1375 } 1376 if (!(dev->flags & IFF_ALLMULTI) && 1377 !(dma->cf_cmd.i596_config[11] & 0x20)) { 1378 dma->cf_cmd.i596_config[11] |= 0x20; 1379 config = 1; 1380 } 1381 if (config) { 1382 if (dma->cf_cmd.cmd.command) 1383 printk(KERN_INFO 1384 "%s: config change request already queued\n", 1385 dev->name); 1386 else { 1387 dma->cf_cmd.cmd.command = SWAP16(CmdConfigure); 1388 dma_sync_dev(dev, &dma->cf_cmd, sizeof(struct cf_cmd)); 1389 i596_add_cmd(dev, &dma->cf_cmd.cmd); 1390 } 1391 } 1392 1393 cnt = netdev_mc_count(dev); 1394 if (cnt > MAX_MC_CNT) { 1395 cnt = MAX_MC_CNT; 1396 printk(KERN_NOTICE "%s: Only %d multicast addresses supported", 1397 dev->name, cnt); 1398 } 1399 1400 if (!netdev_mc_empty(dev)) { 1401 struct netdev_hw_addr *ha; 1402 unsigned char *cp; 1403 struct mc_cmd *cmd; 1404 1405 cmd = &dma->mc_cmd; 1406 cmd->cmd.command = SWAP16(CmdMulticastList); 1407 cmd->mc_cnt = SWAP16(netdev_mc_count(dev) * 6); 1408 cp = cmd->mc_addrs; 1409 netdev_for_each_mc_addr(ha, dev) { 1410 if (!cnt--) 1411 break; 1412 memcpy(cp, ha->addr, ETH_ALEN); 1413 if (i596_debug > 1) 1414 DEB(DEB_MULTI, 1415 printk(KERN_DEBUG 1416 "%s: Adding address %pM\n", 1417 dev->name, cp)); 1418 cp += ETH_ALEN; 1419 } 1420 dma_sync_dev(dev, &dma->mc_cmd, sizeof(struct mc_cmd)); 1421 i596_add_cmd(dev, &cmd->cmd); 1422 } 1423} 1424