1 /* 82596.c: A generic 82596 ethernet driver for linux. */
4 Written 1994 by Mark Evans.
5 This driver is for the Apricot 82596 bus-master interface
7 Modularised 12/94 Mark Evans
10 Modified to support the 82596 ethernet chips on 680x0 VME boards.
11 by Richard Hirst <richard@sleepie.demon.co.uk>
14 980825: Changed to receive directly in to sk_buffs which are
15 allocated at open() time. Eliminates copy on incoming frames
16 (small ones are still copied). Shared data now held in a
17 non-cached page, so we can run on 68060 in copyback mode.
20 * look at deferring rx frames rather than discarding (as per tulip)
21 * handle tx ring full as per tulip
22 * performance test to tune rx_copybreak
24 Most of my modifications relate to the braindead big-endian
25 implementation by Intel. When the i596 is operating in
26 'big-endian' mode, it thinks a 32 bit value of 0x12345678
27 should be stored as 0x56781234. This is a real pain, when
28 you have linked lists which are shared by the 680x0 and the
32 Written 1993 by Donald Becker.
33 Copyright 1993 United States Government as represented by the Director,
34 National Security Agency. This software may only be used and distributed
35 according to the terms of the GNU General Public License as modified by SRC,
36 incorporated herein by reference.
38 The author may be reached as becker@scyld.com, or C/O
39 Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
43 #include <linux/module.h>
44 #include <linux/kernel.h>
45 #include <linux/string.h>
46 #include <linux/errno.h>
47 #include <linux/ioport.h>
48 #include <linux/interrupt.h>
49 #include <linux/delay.h>
50 #include <linux/netdevice.h>
51 #include <linux/etherdevice.h>
52 #include <linux/skbuff.h>
53 #include <linux/init.h>
54 #include <linux/bitops.h>
55 #include <linux/gfp.h>
59 #include <asm/pgtable.h>
60 #include <asm/cacheflush.h>
62 static char version[] __initdata =
63 "82596.c $Revision: 1.5 $\n";
65 #define DRV_NAME "82596"
70 #define DEB_INIT 0x0001
71 #define DEB_PROBE 0x0002
72 #define DEB_SERIOUS 0x0004
73 #define DEB_ERRORS 0x0008
74 #define DEB_MULTI 0x0010
75 #define DEB_TDR 0x0020
76 #define DEB_OPEN 0x0040
77 #define DEB_RESET 0x0080
78 #define DEB_ADDCMD 0x0100
79 #define DEB_STATUS 0x0200
80 #define DEB_STARTTX 0x0400
81 #define DEB_RXADDR 0x0800
82 #define DEB_TXADDR 0x1000
83 #define DEB_RXFRAME 0x2000
84 #define DEB_INTS 0x4000
85 #define DEB_STRUCT 0x8000
86 #define DEB_ANY 0xffff
89 #define DEB(x,y) if (i596_debug & (x)) y
92 #if defined(CONFIG_MVME16x_NET) || defined(CONFIG_MVME16x_NET_MODULE)
93 #define ENABLE_MVME16x_NET
95 #if defined(CONFIG_BVME6000_NET) || defined(CONFIG_BVME6000_NET_MODULE)
96 #define ENABLE_BVME6000_NET
99 #ifdef ENABLE_MVME16x_NET
100 #include <asm/mvme16xhw.h>
102 #ifdef ENABLE_BVME6000_NET
103 #include <asm/bvme6000hw.h>
107 * Define various macros for Channel Attention, word swapping etc., dependent
108 * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel.
112 #define WSWAPrfd(x) ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
113 #define WSWAPrbd(x) ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
114 #define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16)))
115 #define WSWAPscb(x) ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
116 #define WSWAPcmd(x) ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
117 #define WSWAPtbd(x) ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
118 #define WSWAPchar(x) ((char *) (((u32)(x)<<16) | ((((u32)(x)))>>16)))
119 #define ISCP_BUSY 0x00010000
121 #error 82596.c: unknown architecture
125 * These were the intel versions, left here for reference. There
126 * are currently no x86 users of this legacy i82596 chip.
129 #define WSWAPrfd(x) ((struct i596_rfd *)((long)x))
130 #define WSWAPrbd(x) ((struct i596_rbd *)((long)x))
131 #define WSWAPiscp(x) ((struct i596_iscp *)((long)x))
132 #define WSWAPscb(x) ((struct i596_scb *)((long)x))
133 #define WSWAPcmd(x) ((struct i596_cmd *)((long)x))
134 #define WSWAPtbd(x) ((struct i596_tbd *)((long)x))
135 #define WSWAPchar(x) ((char *)((long)x))
136 #define ISCP_BUSY 0x0001
140 * The MPU_PORT command allows direct access to the 82596. With PORT access
141 * the following commands are available (p5-18). The 32-bit port command
142 * must be word-swapped with the most significant word written first.
143 * This only applies to VME boards.
145 #define PORT_RESET 0x00 /* reset 82596 */
146 #define PORT_SELFTEST 0x01 /* selftest */
147 #define PORT_ALTSCP 0x02 /* alternate SCB address */
148 #define PORT_ALTDUMP 0x03 /* Alternate DUMP address */
150 static int i596_debug = (DEB_SERIOUS|DEB_PROBE);
152 MODULE_AUTHOR("Richard Hirst");
153 MODULE_DESCRIPTION("i82596 driver");
154 MODULE_LICENSE("GPL");
156 module_param(i596_debug, int, 0);
157 MODULE_PARM_DESC(i596_debug, "i82596 debug mask");
160 /* Copy frames shorter than rx_copybreak, otherwise pass on up in
161 * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha).
163 static int rx_copybreak = 100;
165 #define PKT_BUF_SZ 1536
166 #define MAX_MC_CNT 64
168 #define I596_TOTAL_SIZE 17
170 #define I596_NULL ((void *)0xffffffff)
172 #define CMD_EOL 0x8000 /* The last command of the list, stop. */
173 #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
174 #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
176 #define CMD_FLEX 0x0008 /* Enable flexible memory model */
179 CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
180 CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7
183 #define STAT_C 0x8000 /* Set to 0 after execution */
184 #define STAT_B 0x4000 /* Command being executed */
185 #define STAT_OK 0x2000 /* Command executed ok */
186 #define STAT_A 0x1000 /* Command aborted */
188 #define CUC_START 0x0100
189 #define CUC_RESUME 0x0200
190 #define CUC_SUSPEND 0x0300
191 #define CUC_ABORT 0x0400
192 #define RX_START 0x0010
193 #define RX_RESUME 0x0020
194 #define RX_SUSPEND 0x0030
195 #define RX_ABORT 0x0040
197 #define TX_TIMEOUT (HZ/20)
201 unsigned short porthi;
202 unsigned short portlo;
207 #define SIZE_MASK 0x3fff
212 struct i596_tbd *next;
216 /* The command structure has two 'next' pointers; v_next is the address of
217 * the next command as seen by the CPU, b_next is the address of the next
218 * command as seen by the 82596. The b_next pointer, as used by the 82596
219 * always references the status field of the next command, rather than the
220 * v_next field, because the 82596 is unaware of v_next. It may seem more
221 * logical to put v_next at the end of the structure, but we cannot do that
222 * because the 82596 expects other fields to be there, depending on command
227 struct i596_cmd *v_next; /* Address from CPUs viewpoint */
228 unsigned short status;
229 unsigned short command;
230 struct i596_cmd *b_next; /* Address from i596 viewpoint */
235 struct i596_tbd *tbd;
238 struct sk_buff *skb; /* So we can free it after tx */
243 unsigned short status;
250 char mc_addrs[MAX_MC_CNT*6];
260 char i596_config[16];
266 struct i596_rfd *b_next; /* Address from i596 viewpoint */
267 struct i596_rbd *rbd;
268 unsigned short count;
270 struct i596_rfd *v_next; /* Address from CPUs viewpoint */
271 struct i596_rfd *v_prev;
275 unsigned short count;
276 unsigned short zero1;
277 struct i596_rbd *b_next;
278 unsigned char *b_data; /* Address from i596 viewpoint */
280 unsigned short zero2;
282 struct i596_rbd *v_next;
283 struct i596_rbd *b_addr; /* This rbd addr from i596 view */
284 unsigned char *v_data; /* Address from CPUs viewpoint */
287 #define TX_RING_SIZE 64
288 #define RX_RING_SIZE 16
291 unsigned short status;
292 unsigned short command;
293 struct i596_cmd *cmd;
294 struct i596_rfd *rfd;
295 unsigned long crc_err;
296 unsigned long align_err;
297 unsigned long resource_err;
298 unsigned long over_err;
299 unsigned long rcvdt_err;
300 unsigned long short_err;
302 unsigned short t_off;
307 struct i596_scb *scb;
311 unsigned long sysbus;
313 struct i596_iscp *iscp;
316 struct i596_private {
317 volatile struct i596_scp scp;
318 volatile struct i596_iscp iscp;
319 volatile struct i596_scb scb;
320 struct sa_cmd sa_cmd;
321 struct cf_cmd cf_cmd;
322 struct tdr_cmd tdr_cmd;
323 struct mc_cmd mc_cmd;
325 int last_restart __attribute__((aligned(4)));
326 struct i596_rfd *rfd_head;
327 struct i596_rbd *rbd_head;
328 struct i596_cmd *cmd_tail;
329 struct i596_cmd *cmd_head;
331 unsigned long last_cmd;
332 struct i596_rfd rfds[RX_RING_SIZE];
333 struct i596_rbd rbds[RX_RING_SIZE];
334 struct tx_cmd tx_cmds[TX_RING_SIZE];
335 struct i596_tbd tbds[TX_RING_SIZE];
340 static char init_setup[] =
342 0x8E, /* length, prefetch on */
343 0xC8, /* fifo to 8, monitor off */
345 0xc0, /* don't save bad frames */
347 0x80, /* don't save bad frames */
349 0x2E, /* No source address insertion, 8 byte preamble */
350 0x00, /* priority and backoff defaults */
351 0x60, /* interframe spacing */
352 0x00, /* slot time LSB */
353 0xf2, /* slot time and retries */
354 0x00, /* promiscuous mode */
355 0x00, /* collision detect */
356 0x40, /* minimum frame length */
359 0x7f /* *multi IA */ };
361 static int i596_open(struct net_device *dev);
362 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
363 static irqreturn_t i596_interrupt(int irq, void *dev_id);
364 static int i596_close(struct net_device *dev);
365 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
366 static void i596_tx_timeout (struct net_device *dev);
367 static void print_eth(unsigned char *buf, char *str);
368 static void set_multicast_list(struct net_device *dev);
370 static int rx_ring_size = RX_RING_SIZE;
371 static int ticks_limit = 25;
372 static int max_cmd_backlog = TX_RING_SIZE-1;
375 static inline void CA(struct net_device *dev)
377 #ifdef ENABLE_MVME16x_NET
378 if (MACH_IS_MVME16x) {
379 ((struct i596_reg *) dev->base_addr)->ca = 1;
382 #ifdef ENABLE_BVME6000_NET
383 if (MACH_IS_BVME6000) {
386 i = *(volatile u32 *) (dev->base_addr);
392 static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x)
394 #ifdef ENABLE_MVME16x_NET
395 if (MACH_IS_MVME16x) {
396 struct i596_reg *p = (struct i596_reg *) (dev->base_addr);
397 p->porthi = ((c) | (u32) (x)) & 0xffff;
398 p->portlo = ((c) | (u32) (x)) >> 16;
401 #ifdef ENABLE_BVME6000_NET
402 if (MACH_IS_BVME6000) {
403 u32 v = (u32) (c) | (u32) (x);
404 v = ((u32) (v) << 16) | ((u32) (v) >> 16);
405 *(volatile u32 *) dev->base_addr = v;
407 *(volatile u32 *) dev->base_addr = v;
413 static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
415 while (--delcnt && lp->iscp.stat)
418 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
419 dev->name, str, lp->scb.status, lp->scb.command);
427 static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str)
429 while (--delcnt && lp->scb.command)
432 printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n",
433 dev->name, str, lp->scb.status, lp->scb.command);
441 static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str)
443 volatile struct i596_cmd *c = cmd;
445 while (--delcnt && c->command)
448 printk(KERN_ERR "%s: %s.\n", dev->name, str);
456 static void i596_display_data(struct net_device *dev)
458 struct i596_private *lp = dev->ml_priv;
459 struct i596_cmd *cmd;
460 struct i596_rfd *rfd;
461 struct i596_rbd *rbd;
463 printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n",
464 &lp->scp, lp->scp.sysbus, lp->scp.iscp);
465 printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n",
466 &lp->iscp, lp->iscp.stat, lp->iscp.scb);
467 printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x,"
468 " .cmd = %p, .rfd = %p\n",
469 &lp->scb, lp->scb.status, lp->scb.command,
470 lp->scb.cmd, lp->scb.rfd);
471 printk(KERN_ERR " errors: crc %lx, align %lx, resource %lx,"
472 " over %lx, rcvdt %lx, short %lx\n",
473 lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err,
474 lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err);
476 while (cmd != I596_NULL) {
477 printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n",
478 cmd, cmd->status, cmd->command, cmd->b_next);
482 printk(KERN_ERR "rfd_head = %p\n", rfd);
484 printk(KERN_ERR " %p .stat %04x, .cmd %04x, b_next %p, rbd %p,"
486 rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd,
489 } while (rfd != lp->rfd_head);
491 printk(KERN_ERR "rbd_head = %p\n", rbd);
493 printk(KERN_ERR " %p .count %04x, b_next %p, b_data %p, size %04x\n",
494 rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size);
496 } while (rbd != lp->rbd_head);
500 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
501 static irqreturn_t i596_error(int irq, void *dev_id)
503 struct net_device *dev = dev_id;
504 #ifdef ENABLE_MVME16x_NET
505 if (MACH_IS_MVME16x) {
506 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
512 #ifdef ENABLE_BVME6000_NET
513 if (MACH_IS_BVME6000) {
514 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
520 printk(KERN_ERR "%s: Error interrupt\n", dev->name);
521 i596_display_data(dev);
526 static inline void remove_rx_bufs(struct net_device *dev)
528 struct i596_private *lp = dev->ml_priv;
529 struct i596_rbd *rbd;
532 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
533 if (rbd->skb == NULL)
535 dev_kfree_skb(rbd->skb);
540 static inline int init_rx_bufs(struct net_device *dev)
542 struct i596_private *lp = dev->ml_priv;
544 struct i596_rfd *rfd;
545 struct i596_rbd *rbd;
547 /* First build the Receive Buffer Descriptor List */
549 for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) {
550 struct sk_buff *skb = netdev_alloc_skb(dev, PKT_BUF_SZ);
558 rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1));
559 rbd->b_addr = WSWAPrbd(virt_to_bus(rbd));
561 rbd->v_data = skb->data;
562 rbd->b_data = WSWAPchar(virt_to_bus(skb->data));
563 rbd->size = PKT_BUF_SZ;
565 cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ);
568 lp->rbd_head = lp->rbds;
569 rbd = lp->rbds + rx_ring_size - 1;
570 rbd->v_next = lp->rbds;
571 rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds));
573 /* Now build the Receive Frame Descriptor List */
575 for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) {
576 rfd->rbd = I596_NULL;
579 rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1));
582 lp->rfd_head = lp->rfds;
583 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
585 rfd->rbd = lp->rbd_head;
586 rfd->v_prev = lp->rfds + rx_ring_size - 1;
587 rfd = lp->rfds + rx_ring_size - 1;
588 rfd->v_next = lp->rfds;
589 rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds));
590 rfd->cmd = CMD_EOL|CMD_FLEX;
596 static void rebuild_rx_bufs(struct net_device *dev)
598 struct i596_private *lp = dev->ml_priv;
601 /* Ensure rx frame/buffer descriptors are tidy */
603 for (i = 0; i < rx_ring_size; i++) {
604 lp->rfds[i].rbd = I596_NULL;
605 lp->rfds[i].cmd = CMD_FLEX;
607 lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX;
608 lp->rfd_head = lp->rfds;
609 lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds));
610 lp->rbd_head = lp->rbds;
611 lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds));
615 static int init_i596_mem(struct net_device *dev)
617 struct i596_private *lp = dev->ml_priv;
620 MPU_PORT(dev, PORT_RESET, NULL);
622 udelay(100); /* Wait 100us - seems to help */
624 #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET)
625 #ifdef ENABLE_MVME16x_NET
626 if (MACH_IS_MVME16x) {
627 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
629 /* Disable all ints for now */
632 /* Following disables snooping. Snooping is not required
633 * as we make appropriate use of non-cached pages for
634 * shared data, and cache_push/cache_clear.
639 #ifdef ENABLE_BVME6000_NET
640 if (MACH_IS_BVME6000) {
641 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
647 /* change the scp address */
649 MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp));
653 lp->last_cmd = jiffies;
655 #ifdef ENABLE_MVME16x_NET
657 lp->scp.sysbus = 0x00000054;
659 #ifdef ENABLE_BVME6000_NET
660 if (MACH_IS_BVME6000)
661 lp->scp.sysbus = 0x0000004c;
664 lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp));
665 lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb));
666 lp->iscp.stat = ISCP_BUSY;
669 lp->cmd_head = lp->scb.cmd = I596_NULL;
671 #ifdef ENABLE_BVME6000_NET
672 if (MACH_IS_BVME6000) {
673 lp->scb.t_on = 7 * 25;
674 lp->scb.t_off = 1 * 25;
678 DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name));
682 if (wait_istat(dev,lp,1000,"initialization timed out"))
684 DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name));
686 /* Ensure rx frame/buffer descriptors are tidy */
687 rebuild_rx_bufs(dev);
690 #ifdef ENABLE_MVME16x_NET
691 if (MACH_IS_MVME16x) {
692 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
694 /* Enable ints, etc. now */
695 pcc2[0x2a] = 0x55; /* Edge sensitive */
699 #ifdef ENABLE_BVME6000_NET
700 if (MACH_IS_BVME6000) {
701 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
708 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name));
709 memcpy(lp->cf_cmd.i596_config, init_setup, 14);
710 lp->cf_cmd.cmd.command = CmdConfigure;
711 i596_add_cmd(dev, &lp->cf_cmd.cmd);
713 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name));
714 memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, 6);
715 lp->sa_cmd.cmd.command = CmdSASetup;
716 i596_add_cmd(dev, &lp->sa_cmd.cmd);
718 DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name));
719 lp->tdr_cmd.cmd.command = CmdTDR;
720 i596_add_cmd(dev, &lp->tdr_cmd.cmd);
722 spin_lock_irqsave (&lp->lock, flags);
724 if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) {
725 spin_unlock_irqrestore (&lp->lock, flags);
728 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name));
729 lp->scb.command = RX_START;
732 spin_unlock_irqrestore (&lp->lock, flags);
734 if (wait_cmd(dev,lp,1000,"RX_START not processed"))
736 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name));
740 printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name);
741 MPU_PORT(dev, PORT_RESET, NULL);
745 static inline int i596_rx(struct net_device *dev)
747 struct i596_private *lp = dev->ml_priv;
748 struct i596_rfd *rfd;
749 struct i596_rbd *rbd;
752 DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n",
753 lp->rfd_head, lp->rbd_head));
755 rfd = lp->rfd_head; /* Ref next frame to check */
757 while ((rfd->stat) & STAT_C) { /* Loop while complete frames */
758 if (rfd->rbd == I596_NULL)
760 else if (rfd->rbd == lp->rbd_head->b_addr)
763 printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name);
767 DEB(DEB_RXFRAME, printk(KERN_DEBUG " rfd %p, rfd.rbd %p, rfd.stat %04x\n",
768 rfd, rfd->rbd, rfd->stat));
770 if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) {
772 int pkt_len = rbd->count & 0x3fff;
773 struct sk_buff *skb = rbd->skb;
776 DEB(DEB_RXADDR,print_eth(rbd->v_data, "received"));
779 /* Check if the packet is long enough to just accept
780 * without copying to a properly sized skbuff.
783 if (pkt_len > rx_copybreak) {
784 struct sk_buff *newskb;
786 /* Get fresh skbuff to replace filled one. */
787 newskb = netdev_alloc_skb(dev, PKT_BUF_SZ);
788 if (newskb == NULL) {
789 skb = NULL; /* drop pkt */
792 /* Pass up the skb already on the Rx ring. */
793 skb_put(skb, pkt_len);
796 rbd->v_data = newskb->data;
797 rbd->b_data = WSWAPchar(virt_to_bus(newskb->data));
799 cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ);
803 skb = netdev_alloc_skb(dev, pkt_len + 2);
806 /* XXX tulip.c can defer packets here!! */
807 printk(KERN_WARNING "%s: i596_rx Memory squeeze, dropping packet.\n", dev->name);
808 dev->stats.rx_dropped++;
812 /* 16 byte align the data fields */
814 memcpy(skb_put(skb,pkt_len), rbd->v_data, pkt_len);
816 skb->protocol=eth_type_trans(skb,dev);
819 cache_clear(virt_to_phys(rbd->skb->data),
823 dev->stats.rx_packets++;
824 dev->stats.rx_bytes+=pkt_len;
828 DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n",
829 dev->name, rfd->stat));
830 dev->stats.rx_errors++;
831 if ((rfd->stat) & 0x0001)
832 dev->stats.collisions++;
833 if ((rfd->stat) & 0x0080)
834 dev->stats.rx_length_errors++;
835 if ((rfd->stat) & 0x0100)
836 dev->stats.rx_over_errors++;
837 if ((rfd->stat) & 0x0200)
838 dev->stats.rx_fifo_errors++;
839 if ((rfd->stat) & 0x0400)
840 dev->stats.rx_frame_errors++;
841 if ((rfd->stat) & 0x0800)
842 dev->stats.rx_crc_errors++;
843 if ((rfd->stat) & 0x1000)
844 dev->stats.rx_length_errors++;
847 /* Clear the buffer descriptor count and EOF + F flags */
849 if (rbd != I596_NULL && (rbd->count & 0x4000)) {
851 lp->rbd_head = rbd->v_next;
854 /* Tidy the frame descriptor, marking it as end of list */
856 rfd->rbd = I596_NULL;
858 rfd->cmd = CMD_EOL|CMD_FLEX;
861 /* Remove end-of-list from old end descriptor */
863 rfd->v_prev->cmd = CMD_FLEX;
865 /* Update record of next frame descriptor to process */
867 lp->scb.rfd = rfd->b_next;
868 lp->rfd_head = rfd->v_next;
872 DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames));
878 static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp)
880 struct i596_cmd *ptr;
882 while (lp->cmd_head != I596_NULL) {
884 lp->cmd_head = ptr->v_next;
887 switch ((ptr->command) & 0x7) {
890 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
891 struct sk_buff *skb = tx_cmd->skb;
895 dev->stats.tx_errors++;
896 dev->stats.tx_aborted_errors++;
898 ptr->v_next = ptr->b_next = I596_NULL;
899 tx_cmd->cmd.command = 0; /* Mark as free */
903 ptr->v_next = ptr->b_next = I596_NULL;
907 wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out");
908 lp->scb.cmd = I596_NULL;
911 static void i596_reset(struct net_device *dev, struct i596_private *lp,
916 DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n"));
918 spin_lock_irqsave (&lp->lock, flags);
920 wait_cmd(dev,lp,100,"i596_reset timed out");
922 netif_stop_queue(dev);
924 lp->scb.command = CUC_ABORT | RX_ABORT;
927 /* wait for shutdown */
928 wait_cmd(dev,lp,1000,"i596_reset 2 timed out");
929 spin_unlock_irqrestore (&lp->lock, flags);
931 i596_cleanup_cmd(dev,lp);
934 netif_start_queue(dev);
938 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd)
940 struct i596_private *lp = dev->ml_priv;
941 int ioaddr = dev->base_addr;
944 DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n"));
947 cmd->command |= (CMD_EOL | CMD_INTR);
948 cmd->v_next = cmd->b_next = I596_NULL;
950 spin_lock_irqsave (&lp->lock, flags);
952 if (lp->cmd_head != I596_NULL) {
953 lp->cmd_tail->v_next = cmd;
954 lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status));
957 wait_cmd(dev,lp,100,"i596_add_cmd timed out");
958 lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status));
959 lp->scb.command = CUC_START;
965 spin_unlock_irqrestore (&lp->lock, flags);
967 if (lp->cmd_backlog > max_cmd_backlog) {
968 unsigned long tickssofar = jiffies - lp->last_cmd;
970 if (tickssofar < ticks_limit)
973 printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name);
975 i596_reset(dev, lp, ioaddr);
979 static int i596_open(struct net_device *dev)
983 DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq));
985 if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) {
986 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
989 #ifdef ENABLE_MVME16x_NET
990 if (MACH_IS_MVME16x) {
991 if (request_irq(0x56, i596_error, 0, "i82596_error", dev)) {
997 res = init_rx_bufs(dev);
1001 netif_start_queue(dev);
1003 if (init_i596_mem(dev)) {
1011 netif_stop_queue(dev);
1012 remove_rx_bufs(dev);
1014 #ifdef ENABLE_MVME16x_NET
1015 free_irq(0x56, dev);
1018 free_irq(dev->irq, dev);
1023 static void i596_tx_timeout (struct net_device *dev)
1025 struct i596_private *lp = dev->ml_priv;
1026 int ioaddr = dev->base_addr;
1028 /* Transmitter timeout, serious problems. */
1029 DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n",
1032 dev->stats.tx_errors++;
1034 /* Try to restart the adaptor */
1035 if (lp->last_restart == dev->stats.tx_packets) {
1036 DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n"));
1037 /* Shutdown and restart */
1038 i596_reset (dev, lp, ioaddr);
1040 /* Issue a channel attention signal */
1041 DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n"));
1042 lp->scb.command = CUC_START | RX_START;
1044 lp->last_restart = dev->stats.tx_packets;
1047 dev->trans_start = jiffies; /* prevent tx timeout */
1048 netif_wake_queue (dev);
1051 static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
1053 struct i596_private *lp = dev->ml_priv;
1054 struct tx_cmd *tx_cmd;
1055 struct i596_tbd *tbd;
1056 short length = skb->len;
1058 DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
1059 dev->name, skb->len, skb->data));
1061 if (skb->len < ETH_ZLEN) {
1062 if (skb_padto(skb, ETH_ZLEN))
1063 return NETDEV_TX_OK;
1066 netif_stop_queue(dev);
1068 tx_cmd = lp->tx_cmds + lp->next_tx_cmd;
1069 tbd = lp->tbds + lp->next_tx_cmd;
1071 if (tx_cmd->cmd.command) {
1072 printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n",
1074 dev->stats.tx_dropped++;
1078 if (++lp->next_tx_cmd == TX_RING_SIZE)
1079 lp->next_tx_cmd = 0;
1080 tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd));
1081 tbd->next = I596_NULL;
1083 tx_cmd->cmd.command = CMD_FLEX | CmdTx;
1089 tbd->size = EOF | length;
1091 tbd->data = WSWAPchar(virt_to_bus(skb->data));
1094 cache_push(virt_to_phys(skb->data), length);
1096 DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued"));
1097 i596_add_cmd(dev, &tx_cmd->cmd);
1099 dev->stats.tx_packets++;
1100 dev->stats.tx_bytes += length;
1103 netif_start_queue(dev);
1105 return NETDEV_TX_OK;
1108 static void print_eth(unsigned char *add, char *str)
1110 printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n",
1111 add, add + 6, add, add[12], add[13], str);
1114 static int io = 0x300;
1115 static int irq = 10;
1117 static const struct net_device_ops i596_netdev_ops = {
1118 .ndo_open = i596_open,
1119 .ndo_stop = i596_close,
1120 .ndo_start_xmit = i596_start_xmit,
1121 .ndo_set_rx_mode = set_multicast_list,
1122 .ndo_tx_timeout = i596_tx_timeout,
1123 .ndo_change_mtu = eth_change_mtu,
1124 .ndo_set_mac_address = eth_mac_addr,
1125 .ndo_validate_addr = eth_validate_addr,
1128 struct net_device * __init i82596_probe(int unit)
1130 struct net_device *dev;
1132 struct i596_private *lp;
1138 return ERR_PTR(-ENODEV);
1141 dev = alloc_etherdev(0);
1143 return ERR_PTR(-ENOMEM);
1146 sprintf(dev->name, "eth%d", unit);
1147 netdev_boot_setup_check(dev);
1149 dev->base_addr = io;
1153 #ifdef ENABLE_MVME16x_NET
1154 if (MACH_IS_MVME16x) {
1155 if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) {
1156 printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n");
1160 memcpy(eth_addr, (void *) 0xfffc1f2c, 6); /* YUCK! Get addr from NOVRAM */
1161 dev->base_addr = MVME_I596_BASE;
1162 dev->irq = (unsigned) MVME16x_IRQ_I596;
1166 #ifdef ENABLE_BVME6000_NET
1167 if (MACH_IS_BVME6000) {
1168 volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE;
1169 unsigned char msr = rtc[3];
1173 for (i = 0; i < 6; i++)
1174 eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */
1176 dev->base_addr = BVME_I596_BASE;
1177 dev->irq = (unsigned) BVME_IRQ_I596;
1185 dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0);
1186 if (!dev->mem_start) {
1191 DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr));
1193 for (i = 0; i < 6; i++)
1194 DEB(DEB_PROBE,printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]));
1196 DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq));
1198 DEB(DEB_PROBE,printk(KERN_INFO "%s", version));
1200 /* The 82596-specific entries in the device structure. */
1201 dev->netdev_ops = &i596_netdev_ops;
1202 dev->watchdog_timeo = TX_TIMEOUT;
1204 dev->ml_priv = (void *)(dev->mem_start);
1207 DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), "
1208 "lp->scb at 0x%08lx\n",
1209 dev->name, (unsigned long)lp,
1210 sizeof(struct i596_private), (unsigned long)&lp->scb));
1211 memset((void *) lp, 0, sizeof(struct i596_private));
1214 cache_push(virt_to_phys((void *)(dev->mem_start)), 4096);
1215 cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096);
1216 kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER);
1218 lp->scb.command = 0;
1219 lp->scb.cmd = I596_NULL;
1220 lp->scb.rfd = I596_NULL;
1221 spin_lock_init(&lp->lock);
1223 err = register_netdev(dev);
1229 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1230 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1232 kernel_set_cachemode((void *)(dev->mem_start), 4096,
1233 IOMAP_FULL_CACHING);
1235 free_page ((u32)(dev->mem_start));
1239 return ERR_PTR(err);
1242 static irqreturn_t i596_interrupt(int irq, void *dev_id)
1244 struct net_device *dev = dev_id;
1245 struct i596_private *lp;
1247 unsigned short status, ack_cmd = 0;
1250 #ifdef ENABLE_BVME6000_NET
1251 if (MACH_IS_BVME6000) {
1252 if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) {
1253 i596_error(irq, dev_id);
1259 printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq);
1263 ioaddr = dev->base_addr;
1266 spin_lock (&lp->lock);
1268 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1269 status = lp->scb.status;
1271 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n",
1272 dev->name, irq, status));
1274 ack_cmd = status & 0xf000;
1276 if ((status & 0x8000) || (status & 0x2000)) {
1277 struct i596_cmd *ptr;
1280 if ((status & 0x8000))
1281 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name));
1282 if ((status & 0x2000))
1283 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700));
1285 while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) {
1288 DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n",
1289 lp->cmd_head->status, lp->cmd_head->command));
1290 lp->cmd_head = ptr->v_next;
1293 switch ((ptr->command) & 0x7) {
1296 struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr;
1297 struct sk_buff *skb = tx_cmd->skb;
1299 if ((ptr->status) & STAT_OK) {
1300 DEB(DEB_TXADDR,print_eth(skb->data, "tx-done"));
1302 dev->stats.tx_errors++;
1303 if ((ptr->status) & 0x0020)
1304 dev->stats.collisions++;
1305 if (!((ptr->status) & 0x0040))
1306 dev->stats.tx_heartbeat_errors++;
1307 if ((ptr->status) & 0x0400)
1308 dev->stats.tx_carrier_errors++;
1309 if ((ptr->status) & 0x0800)
1310 dev->stats.collisions++;
1311 if ((ptr->status) & 0x1000)
1312 dev->stats.tx_aborted_errors++;
1315 dev_kfree_skb_irq(skb);
1317 tx_cmd->cmd.command = 0; /* Mark free */
1322 unsigned short status = ((struct tdr_cmd *)ptr)->status;
1324 if (status & 0x8000) {
1325 DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name));
1327 if (status & 0x4000)
1328 printk(KERN_ERR "%s: Transceiver problem.\n", dev->name);
1329 if (status & 0x2000)
1330 printk(KERN_ERR "%s: Termination problem.\n", dev->name);
1331 if (status & 0x1000)
1332 printk(KERN_ERR "%s: Short circuit.\n", dev->name);
1334 DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff));
1339 case CmdMulticastList:
1340 /* Zap command so set_multicast_list() knows it is free */
1344 ptr->v_next = ptr->b_next = I596_NULL;
1345 lp->last_cmd = jiffies;
1349 while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) {
1350 ptr->command &= 0x1fff;
1354 if ((lp->cmd_head != I596_NULL))
1355 ack_cmd |= CUC_START;
1356 lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status));
1358 if ((status & 0x1000) || (status & 0x4000)) {
1359 if ((status & 0x4000))
1360 DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name));
1362 /* Only RX_START if stopped - RGH 07-07-96 */
1363 if (status & 0x1000) {
1364 if (netif_running(dev)) {
1365 DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status));
1366 ack_cmd |= RX_START;
1367 dev->stats.rx_errors++;
1368 dev->stats.rx_fifo_errors++;
1369 rebuild_rx_bufs(dev);
1373 wait_cmd(dev,lp,100,"i596 interrupt, timeout");
1374 lp->scb.command = ack_cmd;
1376 #ifdef ENABLE_MVME16x_NET
1377 if (MACH_IS_MVME16x) {
1378 /* Ack the interrupt */
1380 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1385 #ifdef ENABLE_BVME6000_NET
1386 if (MACH_IS_BVME6000) {
1387 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1395 DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name));
1397 spin_unlock (&lp->lock);
1398 return IRQ_RETVAL(handled);
1401 static int i596_close(struct net_device *dev)
1403 struct i596_private *lp = dev->ml_priv;
1404 unsigned long flags;
1406 netif_stop_queue(dev);
1408 DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n",
1409 dev->name, lp->scb.status));
1411 spin_lock_irqsave(&lp->lock, flags);
1413 wait_cmd(dev,lp,100,"close1 timed out");
1414 lp->scb.command = CUC_ABORT | RX_ABORT;
1417 wait_cmd(dev,lp,100,"close2 timed out");
1419 spin_unlock_irqrestore(&lp->lock, flags);
1420 DEB(DEB_STRUCT,i596_display_data(dev));
1421 i596_cleanup_cmd(dev,lp);
1423 #ifdef ENABLE_MVME16x_NET
1424 if (MACH_IS_MVME16x) {
1425 volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000;
1427 /* Disable all ints */
1430 pcc2[0x2b] = 0x40; /* Set snooping bits now! */
1433 #ifdef ENABLE_BVME6000_NET
1434 if (MACH_IS_BVME6000) {
1435 volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG;
1441 #ifdef ENABLE_MVME16x_NET
1442 free_irq(0x56, dev);
1444 free_irq(dev->irq, dev);
1445 remove_rx_bufs(dev);
1451 * Set or clear the multicast filter for this adaptor.
1454 static void set_multicast_list(struct net_device *dev)
1456 struct i596_private *lp = dev->ml_priv;
1457 int config = 0, cnt;
1459 DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n",
1460 dev->name, netdev_mc_count(dev),
1461 dev->flags & IFF_PROMISC ? "ON" : "OFF",
1462 dev->flags & IFF_ALLMULTI ? "ON" : "OFF"));
1464 if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out"))
1467 if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) {
1468 lp->cf_cmd.i596_config[8] |= 0x01;
1471 if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) {
1472 lp->cf_cmd.i596_config[8] &= ~0x01;
1475 if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) {
1476 lp->cf_cmd.i596_config[11] &= ~0x20;
1479 if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) {
1480 lp->cf_cmd.i596_config[11] |= 0x20;
1484 lp->cf_cmd.cmd.command = CmdConfigure;
1485 i596_add_cmd(dev, &lp->cf_cmd.cmd);
1488 cnt = netdev_mc_count(dev);
1489 if (cnt > MAX_MC_CNT)
1492 printk(KERN_ERR "%s: Only %d multicast addresses supported",
1496 if (!netdev_mc_empty(dev)) {
1497 struct netdev_hw_addr *ha;
1501 if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out"))
1504 cmd->cmd.command = CmdMulticastList;
1505 cmd->mc_cnt = cnt * ETH_ALEN;
1507 netdev_for_each_mc_addr(ha, dev) {
1510 memcpy(cp, ha->addr, ETH_ALEN);
1512 DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n",
1516 i596_add_cmd(dev, &cmd->cmd);
1521 static struct net_device *dev_82596;
1523 static int debug = -1;
1524 module_param(debug, int, 0);
1525 MODULE_PARM_DESC(debug, "i82596 debug mask");
1527 int __init init_module(void)
1531 dev_82596 = i82596_probe(-1);
1532 if (IS_ERR(dev_82596))
1533 return PTR_ERR(dev_82596);
1537 void __exit cleanup_module(void)
1539 unregister_netdev(dev_82596);
1541 /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING,
1542 * XXX which may be invalid (CONFIG_060_WRITETHROUGH)
1545 kernel_set_cachemode((void *)(dev_82596->mem_start), 4096,
1546 IOMAP_FULL_CACHING);
1548 free_page ((u32)(dev_82596->mem_start));
1549 free_netdev(dev_82596);