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1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 | // SPDX-License-Identifier: GPL-1.0+ /* 82596.c: A generic 82596 ethernet driver for linux. */ /* Based on Apricot.c Written 1994 by Mark Evans. This driver is for the Apricot 82596 bus-master interface Modularised 12/94 Mark Evans Modified to support the 82596 ethernet chips on 680x0 VME boards. by Richard Hirst <richard@sleepie.demon.co.uk> Renamed to be 82596.c 980825: Changed to receive directly in to sk_buffs which are allocated at open() time. Eliminates copy on incoming frames (small ones are still copied). Shared data now held in a non-cached page, so we can run on 68060 in copyback mode. TBD: * look at deferring rx frames rather than discarding (as per tulip) * handle tx ring full as per tulip * performance test to tune rx_copybreak Most of my modifications relate to the braindead big-endian implementation by Intel. When the i596 is operating in 'big-endian' mode, it thinks a 32 bit value of 0x12345678 should be stored as 0x56781234. This is a real pain, when you have linked lists which are shared by the 680x0 and the i596. Driver skeleton Written 1993 by Donald Becker. Copyright 1993 United States Government as represented by the Director, National Security Agency. The author may be reached as becker@scyld.com, or C/O Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403 */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/string.h> #include <linux/errno.h> #include <linux/ioport.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> #include <linux/init.h> #include <linux/bitops.h> #include <linux/gfp.h> #include <linux/pgtable.h> #include <asm/io.h> #include <asm/dma.h> #include <asm/cacheflush.h> static char version[] __initdata = "82596.c $Revision: 1.5 $\n"; #define DRV_NAME "82596" /* DEBUG flags */ #define DEB_INIT 0x0001 #define DEB_PROBE 0x0002 #define DEB_SERIOUS 0x0004 #define DEB_ERRORS 0x0008 #define DEB_MULTI 0x0010 #define DEB_TDR 0x0020 #define DEB_OPEN 0x0040 #define DEB_RESET 0x0080 #define DEB_ADDCMD 0x0100 #define DEB_STATUS 0x0200 #define DEB_STARTTX 0x0400 #define DEB_RXADDR 0x0800 #define DEB_TXADDR 0x1000 #define DEB_RXFRAME 0x2000 #define DEB_INTS 0x4000 #define DEB_STRUCT 0x8000 #define DEB_ANY 0xffff #define DEB(x,y) if (i596_debug & (x)) y #if IS_ENABLED(CONFIG_MVME16x_NET) #define ENABLE_MVME16x_NET #endif #if IS_ENABLED(CONFIG_BVME6000_NET) #define ENABLE_BVME6000_NET #endif #ifdef ENABLE_MVME16x_NET #include <asm/mvme16xhw.h> #endif #ifdef ENABLE_BVME6000_NET #include <asm/bvme6000hw.h> #endif /* * Define various macros for Channel Attention, word swapping etc., dependent * on architecture. MVME and BVME are 680x0 based, otherwise it is Intel. */ #ifdef __mc68000__ #define WSWAPrfd(x) ((struct i596_rfd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) #define WSWAPrbd(x) ((struct i596_rbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) #define WSWAPiscp(x) ((struct i596_iscp *)(((u32)(x)<<16) | ((((u32)(x)))>>16))) #define WSWAPscb(x) ((struct i596_scb *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) #define WSWAPcmd(x) ((struct i596_cmd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) #define WSWAPtbd(x) ((struct i596_tbd *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) #define WSWAPchar(x) ((char *) (((u32)(x)<<16) | ((((u32)(x)))>>16))) #define ISCP_BUSY 0x00010000 #else #error 82596.c: unknown architecture #endif /* * These were the intel versions, left here for reference. There * are currently no x86 users of this legacy i82596 chip. */ #if 0 #define WSWAPrfd(x) ((struct i596_rfd *)((long)x)) #define WSWAPrbd(x) ((struct i596_rbd *)((long)x)) #define WSWAPiscp(x) ((struct i596_iscp *)((long)x)) #define WSWAPscb(x) ((struct i596_scb *)((long)x)) #define WSWAPcmd(x) ((struct i596_cmd *)((long)x)) #define WSWAPtbd(x) ((struct i596_tbd *)((long)x)) #define WSWAPchar(x) ((char *)((long)x)) #define ISCP_BUSY 0x0001 #endif /* * The MPU_PORT command allows direct access to the 82596. With PORT access * the following commands are available (p5-18). The 32-bit port command * must be word-swapped with the most significant word written first. * This only applies to VME boards. */ #define PORT_RESET 0x00 /* reset 82596 */ #define PORT_SELFTEST 0x01 /* selftest */ #define PORT_ALTSCP 0x02 /* alternate SCB address */ #define PORT_ALTDUMP 0x03 /* Alternate DUMP address */ static int i596_debug = (DEB_SERIOUS|DEB_PROBE); MODULE_AUTHOR("Richard Hirst"); MODULE_DESCRIPTION("i82596 driver"); MODULE_LICENSE("GPL"); module_param(i596_debug, int, 0); MODULE_PARM_DESC(i596_debug, "i82596 debug mask"); /* Copy frames shorter than rx_copybreak, otherwise pass on up in * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha). */ static int rx_copybreak = 100; #define PKT_BUF_SZ 1536 #define MAX_MC_CNT 64 #define I596_TOTAL_SIZE 17 #define I596_NULL ((void *)0xffffffff) #define CMD_EOL 0x8000 /* The last command of the list, stop. */ #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */ #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */ #define CMD_FLEX 0x0008 /* Enable flexible memory model */ enum commands { CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3, CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7 }; #define STAT_C 0x8000 /* Set to 0 after execution */ #define STAT_B 0x4000 /* Command being executed */ #define STAT_OK 0x2000 /* Command executed ok */ #define STAT_A 0x1000 /* Command aborted */ #define CUC_START 0x0100 #define CUC_RESUME 0x0200 #define CUC_SUSPEND 0x0300 #define CUC_ABORT 0x0400 #define RX_START 0x0010 #define RX_RESUME 0x0020 #define RX_SUSPEND 0x0030 #define RX_ABORT 0x0040 #define TX_TIMEOUT (HZ/20) struct i596_reg { unsigned short porthi; unsigned short portlo; unsigned long ca; }; #define EOF 0x8000 #define SIZE_MASK 0x3fff struct i596_tbd { unsigned short size; unsigned short pad; struct i596_tbd *next; char *data; }; /* The command structure has two 'next' pointers; v_next is the address of * the next command as seen by the CPU, b_next is the address of the next * command as seen by the 82596. The b_next pointer, as used by the 82596 * always references the status field of the next command, rather than the * v_next field, because the 82596 is unaware of v_next. It may seem more * logical to put v_next at the end of the structure, but we cannot do that * because the 82596 expects other fields to be there, depending on command * type. */ struct i596_cmd { struct i596_cmd *v_next; /* Address from CPUs viewpoint */ unsigned short status; unsigned short command; struct i596_cmd *b_next; /* Address from i596 viewpoint */ }; struct tx_cmd { struct i596_cmd cmd; struct i596_tbd *tbd; unsigned short size; unsigned short pad; struct sk_buff *skb; /* So we can free it after tx */ }; struct tdr_cmd { struct i596_cmd cmd; unsigned short status; unsigned short pad; }; struct mc_cmd { struct i596_cmd cmd; short mc_cnt; char mc_addrs[MAX_MC_CNT*6]; }; struct sa_cmd { struct i596_cmd cmd; char eth_addr[8]; }; struct cf_cmd { struct i596_cmd cmd; char i596_config[16]; }; struct i596_rfd { unsigned short stat; unsigned short cmd; struct i596_rfd *b_next; /* Address from i596 viewpoint */ struct i596_rbd *rbd; unsigned short count; unsigned short size; struct i596_rfd *v_next; /* Address from CPUs viewpoint */ struct i596_rfd *v_prev; }; struct i596_rbd { unsigned short count; unsigned short zero1; struct i596_rbd *b_next; unsigned char *b_data; /* Address from i596 viewpoint */ unsigned short size; unsigned short zero2; struct sk_buff *skb; struct i596_rbd *v_next; struct i596_rbd *b_addr; /* This rbd addr from i596 view */ unsigned char *v_data; /* Address from CPUs viewpoint */ }; #define TX_RING_SIZE 64 #define RX_RING_SIZE 16 struct i596_scb { unsigned short status; unsigned short command; struct i596_cmd *cmd; struct i596_rfd *rfd; unsigned long crc_err; unsigned long align_err; unsigned long resource_err; unsigned long over_err; unsigned long rcvdt_err; unsigned long short_err; unsigned short t_on; unsigned short t_off; }; struct i596_iscp { unsigned long stat; struct i596_scb *scb; }; struct i596_scp { unsigned long sysbus; unsigned long pad; struct i596_iscp *iscp; }; struct i596_private { volatile struct i596_scp scp; volatile struct i596_iscp iscp; volatile struct i596_scb scb; struct sa_cmd sa_cmd; struct cf_cmd cf_cmd; struct tdr_cmd tdr_cmd; struct mc_cmd mc_cmd; unsigned long stat; int last_restart __attribute__((aligned(4))); struct i596_rfd *rfd_head; struct i596_rbd *rbd_head; struct i596_cmd *cmd_tail; struct i596_cmd *cmd_head; int cmd_backlog; unsigned long last_cmd; struct i596_rfd rfds[RX_RING_SIZE]; struct i596_rbd rbds[RX_RING_SIZE]; struct tx_cmd tx_cmds[TX_RING_SIZE]; struct i596_tbd tbds[TX_RING_SIZE]; int next_tx_cmd; spinlock_t lock; }; static char init_setup[] = { 0x8E, /* length, prefetch on */ 0xC8, /* fifo to 8, monitor off */ #ifdef CONFIG_VME 0xc0, /* don't save bad frames */ #else 0x80, /* don't save bad frames */ #endif 0x2E, /* No source address insertion, 8 byte preamble */ 0x00, /* priority and backoff defaults */ 0x60, /* interframe spacing */ 0x00, /* slot time LSB */ 0xf2, /* slot time and retries */ 0x00, /* promiscuous mode */ 0x00, /* collision detect */ 0x40, /* minimum frame length */ 0xff, 0x00, 0x7f /* *multi IA */ }; static int i596_open(struct net_device *dev); static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev); static irqreturn_t i596_interrupt(int irq, void *dev_id); static int i596_close(struct net_device *dev); static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd); static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue); static void print_eth(unsigned char *buf, char *str); static void set_multicast_list(struct net_device *dev); static int rx_ring_size = RX_RING_SIZE; static int ticks_limit = 25; static int max_cmd_backlog = TX_RING_SIZE-1; static inline void CA(struct net_device *dev) { #ifdef ENABLE_MVME16x_NET if (MACH_IS_MVME16x) { ((struct i596_reg *) dev->base_addr)->ca = 1; } #endif #ifdef ENABLE_BVME6000_NET if (MACH_IS_BVME6000) { volatile u32 i; i = *(volatile u32 *) (dev->base_addr); } #endif } static inline void MPU_PORT(struct net_device *dev, int c, volatile void *x) { #ifdef ENABLE_MVME16x_NET if (MACH_IS_MVME16x) { struct i596_reg *p = (struct i596_reg *) (dev->base_addr); p->porthi = ((c) | (u32) (x)) & 0xffff; p->portlo = ((c) | (u32) (x)) >> 16; } #endif #ifdef ENABLE_BVME6000_NET if (MACH_IS_BVME6000) { u32 v = (u32) (c) | (u32) (x); v = ((u32) (v) << 16) | ((u32) (v) >> 16); *(volatile u32 *) dev->base_addr = v; udelay(1); *(volatile u32 *) dev->base_addr = v; } #endif } static inline int wait_istat(struct net_device *dev, struct i596_private *lp, int delcnt, char *str) { while (--delcnt && lp->iscp.stat) udelay(10); if (!delcnt) { printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n", dev->name, str, lp->scb.status, lp->scb.command); return -1; } else return 0; } static inline int wait_cmd(struct net_device *dev, struct i596_private *lp, int delcnt, char *str) { while (--delcnt && lp->scb.command) udelay(10); if (!delcnt) { printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n", dev->name, str, lp->scb.status, lp->scb.command); return -1; } else return 0; } static inline int wait_cfg(struct net_device *dev, struct i596_cmd *cmd, int delcnt, char *str) { volatile struct i596_cmd *c = cmd; while (--delcnt && c->command) udelay(10); if (!delcnt) { printk(KERN_ERR "%s: %s.\n", dev->name, str); return -1; } else return 0; } static void i596_display_data(struct net_device *dev) { struct i596_private *lp = dev->ml_priv; struct i596_cmd *cmd; struct i596_rfd *rfd; struct i596_rbd *rbd; printk(KERN_ERR "lp and scp at %p, .sysbus = %08lx, .iscp = %p\n", &lp->scp, lp->scp.sysbus, lp->scp.iscp); printk(KERN_ERR "iscp at %p, iscp.stat = %08lx, .scb = %p\n", &lp->iscp, lp->iscp.stat, lp->iscp.scb); printk(KERN_ERR "scb at %p, scb.status = %04x, .command = %04x," " .cmd = %p, .rfd = %p\n", &lp->scb, lp->scb.status, lp->scb.command, lp->scb.cmd, lp->scb.rfd); printk(KERN_ERR " errors: crc %lx, align %lx, resource %lx," " over %lx, rcvdt %lx, short %lx\n", lp->scb.crc_err, lp->scb.align_err, lp->scb.resource_err, lp->scb.over_err, lp->scb.rcvdt_err, lp->scb.short_err); cmd = lp->cmd_head; while (cmd != I596_NULL) { printk(KERN_ERR "cmd at %p, .status = %04x, .command = %04x, .b_next = %p\n", cmd, cmd->status, cmd->command, cmd->b_next); cmd = cmd->v_next; } rfd = lp->rfd_head; printk(KERN_ERR "rfd_head = %p\n", rfd); do { printk(KERN_ERR " %p .stat %04x, .cmd %04x, b_next %p, rbd %p," " count %04x\n", rfd, rfd->stat, rfd->cmd, rfd->b_next, rfd->rbd, rfd->count); rfd = rfd->v_next; } while (rfd != lp->rfd_head); rbd = lp->rbd_head; printk(KERN_ERR "rbd_head = %p\n", rbd); do { printk(KERN_ERR " %p .count %04x, b_next %p, b_data %p, size %04x\n", rbd, rbd->count, rbd->b_next, rbd->b_data, rbd->size); rbd = rbd->v_next; } while (rbd != lp->rbd_head); } #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET) static irqreturn_t i596_error(int irq, void *dev_id) { struct net_device *dev = dev_id; #ifdef ENABLE_MVME16x_NET if (MACH_IS_MVME16x) { volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; pcc2[0x28] = 1; pcc2[0x2b] = 0x1d; } #endif #ifdef ENABLE_BVME6000_NET if (MACH_IS_BVME6000) { volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; *ethirq = 1; *ethirq = 3; } #endif printk(KERN_ERR "%s: Error interrupt\n", dev->name); i596_display_data(dev); return IRQ_HANDLED; } #endif static inline void remove_rx_bufs(struct net_device *dev) { struct i596_private *lp = dev->ml_priv; struct i596_rbd *rbd; int i; for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) { if (rbd->skb == NULL) break; dev_kfree_skb(rbd->skb); rbd->skb = NULL; } } static inline int init_rx_bufs(struct net_device *dev) { struct i596_private *lp = dev->ml_priv; int i; struct i596_rfd *rfd; struct i596_rbd *rbd; /* First build the Receive Buffer Descriptor List */ for (i = 0, rbd = lp->rbds; i < rx_ring_size; i++, rbd++) { struct sk_buff *skb = netdev_alloc_skb(dev, PKT_BUF_SZ); if (skb == NULL) { remove_rx_bufs(dev); return -ENOMEM; } rbd->v_next = rbd+1; rbd->b_next = WSWAPrbd(virt_to_bus(rbd+1)); rbd->b_addr = WSWAPrbd(virt_to_bus(rbd)); rbd->skb = skb; rbd->v_data = skb->data; rbd->b_data = WSWAPchar(virt_to_bus(skb->data)); rbd->size = PKT_BUF_SZ; #ifdef __mc68000__ cache_clear(virt_to_phys(skb->data), PKT_BUF_SZ); #endif } lp->rbd_head = lp->rbds; rbd = lp->rbds + rx_ring_size - 1; rbd->v_next = lp->rbds; rbd->b_next = WSWAPrbd(virt_to_bus(lp->rbds)); /* Now build the Receive Frame Descriptor List */ for (i = 0, rfd = lp->rfds; i < rx_ring_size; i++, rfd++) { rfd->rbd = I596_NULL; rfd->v_next = rfd+1; rfd->v_prev = rfd-1; rfd->b_next = WSWAPrfd(virt_to_bus(rfd+1)); rfd->cmd = CMD_FLEX; } lp->rfd_head = lp->rfds; lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds)); rfd = lp->rfds; rfd->rbd = lp->rbd_head; rfd->v_prev = lp->rfds + rx_ring_size - 1; rfd = lp->rfds + rx_ring_size - 1; rfd->v_next = lp->rfds; rfd->b_next = WSWAPrfd(virt_to_bus(lp->rfds)); rfd->cmd = CMD_EOL|CMD_FLEX; return 0; } static void rebuild_rx_bufs(struct net_device *dev) { struct i596_private *lp = dev->ml_priv; int i; /* Ensure rx frame/buffer descriptors are tidy */ for (i = 0; i < rx_ring_size; i++) { lp->rfds[i].rbd = I596_NULL; lp->rfds[i].cmd = CMD_FLEX; } lp->rfds[rx_ring_size-1].cmd = CMD_EOL|CMD_FLEX; lp->rfd_head = lp->rfds; lp->scb.rfd = WSWAPrfd(virt_to_bus(lp->rfds)); lp->rbd_head = lp->rbds; lp->rfds[0].rbd = WSWAPrbd(virt_to_bus(lp->rbds)); } static int init_i596_mem(struct net_device *dev) { struct i596_private *lp = dev->ml_priv; unsigned long flags; MPU_PORT(dev, PORT_RESET, NULL); udelay(100); /* Wait 100us - seems to help */ #if defined(ENABLE_MVME16x_NET) || defined(ENABLE_BVME6000_NET) #ifdef ENABLE_MVME16x_NET if (MACH_IS_MVME16x) { volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; /* Disable all ints for now */ pcc2[0x28] = 1; pcc2[0x2a] = 0x48; /* Following disables snooping. Snooping is not required * as we make appropriate use of non-cached pages for * shared data, and cache_push/cache_clear. */ pcc2[0x2b] = 0x08; } #endif #ifdef ENABLE_BVME6000_NET if (MACH_IS_BVME6000) { volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; *ethirq = 1; } #endif /* change the scp address */ MPU_PORT(dev, PORT_ALTSCP, (void *)virt_to_bus((void *)&lp->scp)); #endif lp->last_cmd = jiffies; #ifdef ENABLE_MVME16x_NET if (MACH_IS_MVME16x) lp->scp.sysbus = 0x00000054; #endif #ifdef ENABLE_BVME6000_NET if (MACH_IS_BVME6000) lp->scp.sysbus = 0x0000004c; #endif lp->scp.iscp = WSWAPiscp(virt_to_bus((void *)&lp->iscp)); lp->iscp.scb = WSWAPscb(virt_to_bus((void *)&lp->scb)); lp->iscp.stat = ISCP_BUSY; lp->cmd_backlog = 0; lp->cmd_head = lp->scb.cmd = I596_NULL; #ifdef ENABLE_BVME6000_NET if (MACH_IS_BVME6000) { lp->scb.t_on = 7 * 25; lp->scb.t_off = 1 * 25; } #endif DEB(DEB_INIT,printk(KERN_DEBUG "%s: starting i82596.\n", dev->name)); CA(dev); if (wait_istat(dev,lp,1000,"initialization timed out")) goto failed; DEB(DEB_INIT,printk(KERN_DEBUG "%s: i82596 initialization successful\n", dev->name)); /* Ensure rx frame/buffer descriptors are tidy */ rebuild_rx_bufs(dev); lp->scb.command = 0; #ifdef ENABLE_MVME16x_NET if (MACH_IS_MVME16x) { volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; /* Enable ints, etc. now */ pcc2[0x2a] = 0x55; /* Edge sensitive */ pcc2[0x2b] = 0x15; } #endif #ifdef ENABLE_BVME6000_NET if (MACH_IS_BVME6000) { volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; *ethirq = 3; } #endif DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdConfigure\n", dev->name)); memcpy(lp->cf_cmd.i596_config, init_setup, 14); lp->cf_cmd.cmd.command = CmdConfigure; i596_add_cmd(dev, &lp->cf_cmd.cmd); DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name)); memcpy(lp->sa_cmd.eth_addr, dev->dev_addr, ETH_ALEN); lp->sa_cmd.cmd.command = CmdSASetup; i596_add_cmd(dev, &lp->sa_cmd.cmd); DEB(DEB_INIT,printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name)); lp->tdr_cmd.cmd.command = CmdTDR; i596_add_cmd(dev, &lp->tdr_cmd.cmd); spin_lock_irqsave (&lp->lock, flags); if (wait_cmd(dev,lp,1000,"timed out waiting to issue RX_START")) { spin_unlock_irqrestore (&lp->lock, flags); goto failed; } DEB(DEB_INIT,printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name)); lp->scb.command = RX_START; CA(dev); spin_unlock_irqrestore (&lp->lock, flags); if (wait_cmd(dev,lp,1000,"RX_START not processed")) goto failed; DEB(DEB_INIT,printk(KERN_DEBUG "%s: Receive unit started OK\n", dev->name)); return 0; failed: printk(KERN_CRIT "%s: Failed to initialise 82596\n", dev->name); MPU_PORT(dev, PORT_RESET, NULL); return -1; } static inline int i596_rx(struct net_device *dev) { struct i596_private *lp = dev->ml_priv; struct i596_rfd *rfd; struct i596_rbd *rbd; int frames = 0; DEB(DEB_RXFRAME,printk(KERN_DEBUG "i596_rx(), rfd_head %p, rbd_head %p\n", lp->rfd_head, lp->rbd_head)); rfd = lp->rfd_head; /* Ref next frame to check */ while ((rfd->stat) & STAT_C) { /* Loop while complete frames */ if (rfd->rbd == I596_NULL) rbd = I596_NULL; else if (rfd->rbd == lp->rbd_head->b_addr) rbd = lp->rbd_head; else { printk(KERN_CRIT "%s: rbd chain broken!\n", dev->name); /* XXX Now what? */ rbd = I596_NULL; } DEB(DEB_RXFRAME, printk(KERN_DEBUG " rfd %p, rfd.rbd %p, rfd.stat %04x\n", rfd, rfd->rbd, rfd->stat)); if (rbd != I596_NULL && ((rfd->stat) & STAT_OK)) { /* a good frame */ int pkt_len = rbd->count & 0x3fff; struct sk_buff *skb = rbd->skb; int rx_in_place = 0; DEB(DEB_RXADDR,print_eth(rbd->v_data, "received")); frames++; /* Check if the packet is long enough to just accept * without copying to a properly sized skbuff. */ if (pkt_len > rx_copybreak) { struct sk_buff *newskb; /* Get fresh skbuff to replace filled one. */ newskb = netdev_alloc_skb(dev, PKT_BUF_SZ); if (newskb == NULL) { skb = NULL; /* drop pkt */ goto memory_squeeze; } /* Pass up the skb already on the Rx ring. */ skb_put(skb, pkt_len); rx_in_place = 1; rbd->skb = newskb; rbd->v_data = newskb->data; rbd->b_data = WSWAPchar(virt_to_bus(newskb->data)); #ifdef __mc68000__ cache_clear(virt_to_phys(newskb->data), PKT_BUF_SZ); #endif } else { skb = netdev_alloc_skb(dev, pkt_len + 2); } memory_squeeze: if (skb == NULL) { /* XXX tulip.c can defer packets here!! */ dev->stats.rx_dropped++; } else { if (!rx_in_place) { /* 16 byte align the data fields */ skb_reserve(skb, 2); skb_put_data(skb, rbd->v_data, pkt_len); } skb->protocol=eth_type_trans(skb,dev); skb->len = pkt_len; #ifdef __mc68000__ cache_clear(virt_to_phys(rbd->skb->data), pkt_len); #endif netif_rx(skb); dev->stats.rx_packets++; dev->stats.rx_bytes+=pkt_len; } } else { DEB(DEB_ERRORS, printk(KERN_DEBUG "%s: Error, rfd.stat = 0x%04x\n", dev->name, rfd->stat)); dev->stats.rx_errors++; if ((rfd->stat) & 0x0001) dev->stats.collisions++; if ((rfd->stat) & 0x0080) dev->stats.rx_length_errors++; if ((rfd->stat) & 0x0100) dev->stats.rx_over_errors++; if ((rfd->stat) & 0x0200) dev->stats.rx_fifo_errors++; if ((rfd->stat) & 0x0400) dev->stats.rx_frame_errors++; if ((rfd->stat) & 0x0800) dev->stats.rx_crc_errors++; if ((rfd->stat) & 0x1000) dev->stats.rx_length_errors++; } /* Clear the buffer descriptor count and EOF + F flags */ if (rbd != I596_NULL && (rbd->count & 0x4000)) { rbd->count = 0; lp->rbd_head = rbd->v_next; } /* Tidy the frame descriptor, marking it as end of list */ rfd->rbd = I596_NULL; rfd->stat = 0; rfd->cmd = CMD_EOL|CMD_FLEX; rfd->count = 0; /* Remove end-of-list from old end descriptor */ rfd->v_prev->cmd = CMD_FLEX; /* Update record of next frame descriptor to process */ lp->scb.rfd = rfd->b_next; lp->rfd_head = rfd->v_next; rfd = lp->rfd_head; } DEB(DEB_RXFRAME,printk(KERN_DEBUG "frames %d\n", frames)); return 0; } static void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp) { struct i596_cmd *ptr; while (lp->cmd_head != I596_NULL) { ptr = lp->cmd_head; lp->cmd_head = ptr->v_next; lp->cmd_backlog--; switch ((ptr->command) & 0x7) { case CmdTx: { struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; struct sk_buff *skb = tx_cmd->skb; dev_kfree_skb(skb); dev->stats.tx_errors++; dev->stats.tx_aborted_errors++; ptr->v_next = ptr->b_next = I596_NULL; tx_cmd->cmd.command = 0; /* Mark as free */ break; } default: ptr->v_next = ptr->b_next = I596_NULL; } } wait_cmd(dev,lp,100,"i596_cleanup_cmd timed out"); lp->scb.cmd = I596_NULL; } static void i596_reset(struct net_device *dev, struct i596_private *lp, int ioaddr) { unsigned long flags; DEB(DEB_RESET,printk(KERN_DEBUG "i596_reset\n")); spin_lock_irqsave (&lp->lock, flags); wait_cmd(dev,lp,100,"i596_reset timed out"); netif_stop_queue(dev); lp->scb.command = CUC_ABORT | RX_ABORT; CA(dev); /* wait for shutdown */ wait_cmd(dev,lp,1000,"i596_reset 2 timed out"); spin_unlock_irqrestore (&lp->lock, flags); i596_cleanup_cmd(dev,lp); i596_rx(dev); netif_start_queue(dev); init_i596_mem(dev); } static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) { struct i596_private *lp = dev->ml_priv; int ioaddr = dev->base_addr; unsigned long flags; DEB(DEB_ADDCMD,printk(KERN_DEBUG "i596_add_cmd\n")); cmd->status = 0; cmd->command |= (CMD_EOL | CMD_INTR); cmd->v_next = cmd->b_next = I596_NULL; spin_lock_irqsave (&lp->lock, flags); if (lp->cmd_head != I596_NULL) { lp->cmd_tail->v_next = cmd; lp->cmd_tail->b_next = WSWAPcmd(virt_to_bus(&cmd->status)); } else { lp->cmd_head = cmd; wait_cmd(dev,lp,100,"i596_add_cmd timed out"); lp->scb.cmd = WSWAPcmd(virt_to_bus(&cmd->status)); lp->scb.command = CUC_START; CA(dev); } lp->cmd_tail = cmd; lp->cmd_backlog++; spin_unlock_irqrestore (&lp->lock, flags); if (lp->cmd_backlog > max_cmd_backlog) { unsigned long tickssofar = jiffies - lp->last_cmd; if (tickssofar < ticks_limit) return; printk(KERN_NOTICE "%s: command unit timed out, status resetting.\n", dev->name); i596_reset(dev, lp, ioaddr); } } static int i596_open(struct net_device *dev) { int res = 0; DEB(DEB_OPEN,printk(KERN_DEBUG "%s: i596_open() irq %d.\n", dev->name, dev->irq)); if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) { printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq); return -EAGAIN; } #ifdef ENABLE_MVME16x_NET if (MACH_IS_MVME16x) { if (request_irq(0x56, i596_error, 0, "i82596_error", dev)) { res = -EAGAIN; goto err_irq_dev; } } #endif res = init_rx_bufs(dev); if (res) goto err_irq_56; netif_start_queue(dev); if (init_i596_mem(dev)) { res = -EAGAIN; goto err_queue; } return 0; err_queue: netif_stop_queue(dev); remove_rx_bufs(dev); err_irq_56: #ifdef ENABLE_MVME16x_NET free_irq(0x56, dev); err_irq_dev: #endif free_irq(dev->irq, dev); return res; } static void i596_tx_timeout (struct net_device *dev, unsigned int txqueue) { struct i596_private *lp = dev->ml_priv; int ioaddr = dev->base_addr; /* Transmitter timeout, serious problems. */ DEB(DEB_ERRORS,printk(KERN_ERR "%s: transmit timed out, status resetting.\n", dev->name)); dev->stats.tx_errors++; /* Try to restart the adaptor */ if (lp->last_restart == dev->stats.tx_packets) { DEB(DEB_ERRORS,printk(KERN_ERR "Resetting board.\n")); /* Shutdown and restart */ i596_reset (dev, lp, ioaddr); } else { /* Issue a channel attention signal */ DEB(DEB_ERRORS,printk(KERN_ERR "Kicking board.\n")); lp->scb.command = CUC_START | RX_START; CA (dev); lp->last_restart = dev->stats.tx_packets; } netif_trans_update(dev); /* prevent tx timeout */ netif_wake_queue (dev); } static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct i596_private *lp = dev->ml_priv; struct tx_cmd *tx_cmd; struct i596_tbd *tbd; short length = skb->len; DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n", dev->name, skb->len, skb->data)); if (skb->len < ETH_ZLEN) { if (skb_padto(skb, ETH_ZLEN)) return NETDEV_TX_OK; length = ETH_ZLEN; } netif_stop_queue(dev); tx_cmd = lp->tx_cmds + lp->next_tx_cmd; tbd = lp->tbds + lp->next_tx_cmd; if (tx_cmd->cmd.command) { printk(KERN_NOTICE "%s: xmit ring full, dropping packet.\n", dev->name); dev->stats.tx_dropped++; dev_kfree_skb(skb); } else { if (++lp->next_tx_cmd == TX_RING_SIZE) lp->next_tx_cmd = 0; tx_cmd->tbd = WSWAPtbd(virt_to_bus(tbd)); tbd->next = I596_NULL; tx_cmd->cmd.command = CMD_FLEX | CmdTx; tx_cmd->skb = skb; tx_cmd->pad = 0; tx_cmd->size = 0; tbd->pad = 0; tbd->size = EOF | length; tbd->data = WSWAPchar(virt_to_bus(skb->data)); #ifdef __mc68000__ cache_push(virt_to_phys(skb->data), length); #endif DEB(DEB_TXADDR,print_eth(skb->data, "tx-queued")); i596_add_cmd(dev, &tx_cmd->cmd); dev->stats.tx_packets++; dev->stats.tx_bytes += length; } netif_start_queue(dev); return NETDEV_TX_OK; } static void print_eth(unsigned char *add, char *str) { printk(KERN_DEBUG "i596 0x%p, %pM --> %pM %02X%02X, %s\n", add, add + 6, add, add[12], add[13], str); } static const struct net_device_ops i596_netdev_ops = { .ndo_open = i596_open, .ndo_stop = i596_close, .ndo_start_xmit = i596_start_xmit, .ndo_set_rx_mode = set_multicast_list, .ndo_tx_timeout = i596_tx_timeout, .ndo_set_mac_address = eth_mac_addr, .ndo_validate_addr = eth_validate_addr, }; static struct net_device * __init i82596_probe(void) { struct net_device *dev; int i; struct i596_private *lp; char eth_addr[8]; static int probed; int err; if (probed) return ERR_PTR(-ENODEV); probed++; dev = alloc_etherdev(0); if (!dev) return ERR_PTR(-ENOMEM); #ifdef ENABLE_MVME16x_NET if (MACH_IS_MVME16x) { if (mvme16x_config & MVME16x_CONFIG_NO_ETHERNET) { printk(KERN_NOTICE "Ethernet probe disabled - chip not present\n"); err = -ENODEV; goto out; } memcpy(eth_addr, absolute_pointer(0xfffc1f2c), ETH_ALEN); /* YUCK! Get addr from NOVRAM */ dev->base_addr = MVME_I596_BASE; dev->irq = (unsigned) MVME16x_IRQ_I596; goto found; } #endif #ifdef ENABLE_BVME6000_NET if (MACH_IS_BVME6000) { volatile unsigned char *rtc = (unsigned char *) BVME_RTC_BASE; unsigned char msr = rtc[3]; int i; rtc[3] |= 0x80; for (i = 0; i < 6; i++) eth_addr[i] = rtc[i * 4 + 7]; /* Stored in RTC RAM at offset 1 */ rtc[3] = msr; dev->base_addr = BVME_I596_BASE; dev->irq = (unsigned) BVME_IRQ_I596; goto found; } #endif err = -ENODEV; goto out; found: dev->mem_start = (int)__get_free_pages(GFP_ATOMIC, 0); if (!dev->mem_start) { err = -ENOMEM; goto out1; } DEB(DEB_PROBE,printk(KERN_INFO "%s: 82596 at %#3lx,", dev->name, dev->base_addr)); for (i = 0; i < 6; i++) DEB(DEB_PROBE,printk(" %2.2X", eth_addr[i])); eth_hw_addr_set(dev, eth_addr); DEB(DEB_PROBE,printk(" IRQ %d.\n", dev->irq)); DEB(DEB_PROBE,printk(KERN_INFO "%s", version)); /* The 82596-specific entries in the device structure. */ dev->netdev_ops = &i596_netdev_ops; dev->watchdog_timeo = TX_TIMEOUT; dev->ml_priv = (void *)(dev->mem_start); lp = dev->ml_priv; DEB(DEB_INIT,printk(KERN_DEBUG "%s: lp at 0x%08lx (%zd bytes), " "lp->scb at 0x%08lx\n", dev->name, (unsigned long)lp, sizeof(struct i596_private), (unsigned long)&lp->scb)); memset((void *) lp, 0, sizeof(struct i596_private)); #ifdef __mc68000__ cache_push(virt_to_phys((void *)(dev->mem_start)), 4096); cache_clear(virt_to_phys((void *)(dev->mem_start)), 4096); kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_NOCACHE_SER); #endif lp->scb.command = 0; lp->scb.cmd = I596_NULL; lp->scb.rfd = I596_NULL; spin_lock_init(&lp->lock); err = register_netdev(dev); if (err) goto out2; return dev; out2: #ifdef __mc68000__ /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, * XXX which may be invalid (CONFIG_060_WRITETHROUGH) */ kernel_set_cachemode((void *)(dev->mem_start), 4096, IOMAP_FULL_CACHING); #endif free_page ((u32)(dev->mem_start)); out1: out: free_netdev(dev); return ERR_PTR(err); } static irqreturn_t i596_interrupt(int irq, void *dev_id) { struct net_device *dev = dev_id; struct i596_private *lp; short ioaddr; unsigned short status, ack_cmd = 0; int handled = 0; #ifdef ENABLE_BVME6000_NET if (MACH_IS_BVME6000) { if (*(char *) BVME_LOCAL_IRQ_STAT & BVME_ETHERR) { i596_error(irq, dev_id); return IRQ_HANDLED; } } #endif if (dev == NULL) { printk(KERN_ERR "i596_interrupt(): irq %d for unknown device.\n", irq); return IRQ_NONE; } ioaddr = dev->base_addr; lp = dev->ml_priv; spin_lock (&lp->lock); wait_cmd(dev,lp,100,"i596 interrupt, timeout"); status = lp->scb.status; DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt, IRQ %d, status %4.4x.\n", dev->name, irq, status)); ack_cmd = status & 0xf000; if ((status & 0x8000) || (status & 0x2000)) { struct i596_cmd *ptr; handled = 1; if ((status & 0x8000)) DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt completed command.\n", dev->name)); if ((status & 0x2000)) DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt command unit inactive %x.\n", dev->name, status & 0x0700)); while ((lp->cmd_head != I596_NULL) && (lp->cmd_head->status & STAT_C)) { ptr = lp->cmd_head; DEB(DEB_STATUS,printk(KERN_DEBUG "cmd_head->status = %04x, ->command = %04x\n", lp->cmd_head->status, lp->cmd_head->command)); lp->cmd_head = ptr->v_next; lp->cmd_backlog--; switch ((ptr->command) & 0x7) { case CmdTx: { struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; struct sk_buff *skb = tx_cmd->skb; if ((ptr->status) & STAT_OK) { DEB(DEB_TXADDR,print_eth(skb->data, "tx-done")); } else { dev->stats.tx_errors++; if ((ptr->status) & 0x0020) dev->stats.collisions++; if (!((ptr->status) & 0x0040)) dev->stats.tx_heartbeat_errors++; if ((ptr->status) & 0x0400) dev->stats.tx_carrier_errors++; if ((ptr->status) & 0x0800) dev->stats.collisions++; if ((ptr->status) & 0x1000) dev->stats.tx_aborted_errors++; } dev_consume_skb_irq(skb); tx_cmd->cmd.command = 0; /* Mark free */ break; } case CmdTDR: { unsigned short status = ((struct tdr_cmd *)ptr)->status; if (status & 0x8000) { DEB(DEB_TDR,printk(KERN_INFO "%s: link ok.\n", dev->name)); } else { if (status & 0x4000) printk(KERN_ERR "%s: Transceiver problem.\n", dev->name); if (status & 0x2000) printk(KERN_ERR "%s: Termination problem.\n", dev->name); if (status & 0x1000) printk(KERN_ERR "%s: Short circuit.\n", dev->name); DEB(DEB_TDR,printk(KERN_INFO "%s: Time %d.\n", dev->name, status & 0x07ff)); } break; } case CmdConfigure: case CmdMulticastList: /* Zap command so set_multicast_list() knows it is free */ ptr->command = 0; break; } ptr->v_next = ptr->b_next = I596_NULL; lp->last_cmd = jiffies; } ptr = lp->cmd_head; while ((ptr != I596_NULL) && (ptr != lp->cmd_tail)) { ptr->command &= 0x1fff; ptr = ptr->v_next; } if ((lp->cmd_head != I596_NULL)) ack_cmd |= CUC_START; lp->scb.cmd = WSWAPcmd(virt_to_bus(&lp->cmd_head->status)); } if ((status & 0x1000) || (status & 0x4000)) { if ((status & 0x4000)) DEB(DEB_INTS,printk(KERN_DEBUG "%s: i596 interrupt received a frame.\n", dev->name)); i596_rx(dev); /* Only RX_START if stopped - RGH 07-07-96 */ if (status & 0x1000) { if (netif_running(dev)) { DEB(DEB_ERRORS,printk(KERN_ERR "%s: i596 interrupt receive unit inactive, status 0x%x\n", dev->name, status)); ack_cmd |= RX_START; dev->stats.rx_errors++; dev->stats.rx_fifo_errors++; rebuild_rx_bufs(dev); } } } wait_cmd(dev,lp,100,"i596 interrupt, timeout"); lp->scb.command = ack_cmd; #ifdef ENABLE_MVME16x_NET if (MACH_IS_MVME16x) { /* Ack the interrupt */ volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; pcc2[0x2a] |= 0x08; } #endif #ifdef ENABLE_BVME6000_NET if (MACH_IS_BVME6000) { volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; *ethirq = 1; *ethirq = 3; } #endif CA(dev); DEB(DEB_INTS,printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name)); spin_unlock (&lp->lock); return IRQ_RETVAL(handled); } static int i596_close(struct net_device *dev) { struct i596_private *lp = dev->ml_priv; unsigned long flags; netif_stop_queue(dev); DEB(DEB_INIT,printk(KERN_DEBUG "%s: Shutting down ethercard, status was %4.4x.\n", dev->name, lp->scb.status)); spin_lock_irqsave(&lp->lock, flags); wait_cmd(dev,lp,100,"close1 timed out"); lp->scb.command = CUC_ABORT | RX_ABORT; CA(dev); wait_cmd(dev,lp,100,"close2 timed out"); spin_unlock_irqrestore(&lp->lock, flags); DEB(DEB_STRUCT,i596_display_data(dev)); i596_cleanup_cmd(dev,lp); #ifdef ENABLE_MVME16x_NET if (MACH_IS_MVME16x) { volatile unsigned char *pcc2 = (unsigned char *) 0xfff42000; /* Disable all ints */ pcc2[0x28] = 1; pcc2[0x2a] = 0x40; pcc2[0x2b] = 0x40; /* Set snooping bits now! */ } #endif #ifdef ENABLE_BVME6000_NET if (MACH_IS_BVME6000) { volatile unsigned char *ethirq = (unsigned char *) BVME_ETHIRQ_REG; *ethirq = 1; } #endif #ifdef ENABLE_MVME16x_NET free_irq(0x56, dev); #endif free_irq(dev->irq, dev); remove_rx_bufs(dev); return 0; } /* * Set or clear the multicast filter for this adaptor. */ static void set_multicast_list(struct net_device *dev) { struct i596_private *lp = dev->ml_priv; int config = 0, cnt; DEB(DEB_MULTI,printk(KERN_DEBUG "%s: set multicast list, %d entries, promisc %s, allmulti %s\n", dev->name, netdev_mc_count(dev), dev->flags & IFF_PROMISC ? "ON" : "OFF", dev->flags & IFF_ALLMULTI ? "ON" : "OFF")); if (wait_cfg(dev, &lp->cf_cmd.cmd, 1000, "config change request timed out")) return; if ((dev->flags & IFF_PROMISC) && !(lp->cf_cmd.i596_config[8] & 0x01)) { lp->cf_cmd.i596_config[8] |= 0x01; config = 1; } if (!(dev->flags & IFF_PROMISC) && (lp->cf_cmd.i596_config[8] & 0x01)) { lp->cf_cmd.i596_config[8] &= ~0x01; config = 1; } if ((dev->flags & IFF_ALLMULTI) && (lp->cf_cmd.i596_config[11] & 0x20)) { lp->cf_cmd.i596_config[11] &= ~0x20; config = 1; } if (!(dev->flags & IFF_ALLMULTI) && !(lp->cf_cmd.i596_config[11] & 0x20)) { lp->cf_cmd.i596_config[11] |= 0x20; config = 1; } if (config) { lp->cf_cmd.cmd.command = CmdConfigure; i596_add_cmd(dev, &lp->cf_cmd.cmd); } cnt = netdev_mc_count(dev); if (cnt > MAX_MC_CNT) { cnt = MAX_MC_CNT; printk(KERN_ERR "%s: Only %d multicast addresses supported", dev->name, cnt); } if (!netdev_mc_empty(dev)) { struct netdev_hw_addr *ha; unsigned char *cp; struct mc_cmd *cmd; if (wait_cfg(dev, &lp->mc_cmd.cmd, 1000, "multicast list change request timed out")) return; cmd = &lp->mc_cmd; cmd->cmd.command = CmdMulticastList; cmd->mc_cnt = cnt * ETH_ALEN; cp = cmd->mc_addrs; netdev_for_each_mc_addr(ha, dev) { if (!cnt--) break; memcpy(cp, ha->addr, ETH_ALEN); if (i596_debug > 1) DEB(DEB_MULTI,printk(KERN_INFO "%s: Adding address %pM\n", dev->name, cp)); cp += ETH_ALEN; } i596_add_cmd(dev, &cmd->cmd); } } static struct net_device *dev_82596; static int debug = -1; module_param(debug, int, 0); MODULE_PARM_DESC(debug, "i82596 debug mask"); static int __init i82596_init(void) { if (debug >= 0) i596_debug = debug; dev_82596 = i82596_probe(); return PTR_ERR_OR_ZERO(dev_82596); } module_init(i82596_init); static void __exit i82596_cleanup(void) { unregister_netdev(dev_82596); #ifdef __mc68000__ /* XXX This assumes default cache mode to be IOMAP_FULL_CACHING, * XXX which may be invalid (CONFIG_060_WRITETHROUGH) */ kernel_set_cachemode((void *)(dev_82596->mem_start), 4096, IOMAP_FULL_CACHING); #endif free_page ((u32)(dev_82596->mem_start)); free_netdev(dev_82596); } module_exit(i82596_cleanup); |