| // 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); |