| /* lasi_82596.c -- driver for the intel 82596 ethernet controller, as |
| munged into HPPA boxen . |
| |
| This driver is based upon 82596.c, original credits are below... |
| but there were too many hoops which HP wants jumped through to |
| keep this code in there in a sane manner. |
| |
| 3 primary sources of the mess -- |
| 1) hppa needs *lots* of cacheline flushing to keep this kind of |
| MMIO running. |
| |
| 2) The 82596 needs to see all of its pointers as their physical |
| address. Thus virt_to_bus/bus_to_virt are *everywhere*. |
| |
| 3) The implementation HP is using seems to be significantly pickier |
| about when and how the command and RX units are started. some |
| command ordering was changed. |
| |
| Examination of the mach driver leads one to believe that there |
| might be a saner way to pull this off... anyone who feels like a |
| full rewrite can be my guest. |
| |
| Split 02/13/2000 Sam Creasey (sammy@oh.verio.com) |
| |
| 02/01/2000 Initial modifications for parisc by Helge Deller (deller@gmx.de) |
| 03/02/2000 changes for better/correct(?) cache-flushing (deller) |
| */ |
| |
| /* 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. This software may only be used and distributed |
| according to the terms of the GNU General Public License as modified by SRC, |
| incorporated herein by reference. |
| |
| 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/types.h> |
| #include <linux/bitops.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/io.h> |
| #include <linux/irq.h> |
| #include <linux/gfp.h> |
| |
| /* 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; } |
| |
| |
| /* |
| * 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); |
| |
| /* 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 ISCP_BUSY 0x0001 |
| |
| #define I596_NULL ((u32)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; |
| u32 ca; |
| }; |
| |
| #define EOF 0x8000 |
| #define SIZE_MASK 0x3fff |
| |
| struct i596_tbd { |
| unsigned short size; |
| unsigned short pad; |
| u32 next; |
| u32 data; |
| u32 cache_pad[5]; /* Total 32 bytes... */ |
| }; |
| |
| /* 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; |
| u32 b_next; /* Address from i596 viewpoint */ |
| }; |
| |
| struct tx_cmd { |
| struct i596_cmd cmd; |
| u32 tbd; |
| unsigned short size; |
| unsigned short pad; |
| struct sk_buff *skb; /* So we can free it after tx */ |
| dma_addr_t dma_addr; |
| #ifdef __LP64__ |
| u32 cache_pad[6]; /* Total 64 bytes... */ |
| #else |
| u32 cache_pad[1]; /* Total 32 bytes... */ |
| #endif |
| }; |
| |
| 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; |
| u32 b_next; /* Address from i596 viewpoint */ |
| u32 rbd; |
| unsigned short count; |
| unsigned short size; |
| struct i596_rfd *v_next; /* Address from CPUs viewpoint */ |
| struct i596_rfd *v_prev; |
| #ifndef __LP64__ |
| u32 cache_pad[2]; /* Total 32 bytes... */ |
| #endif |
| }; |
| |
| struct i596_rbd { |
| /* hardware data */ |
| unsigned short count; |
| unsigned short zero1; |
| u32 b_next; |
| u32 b_data; /* Address from i596 viewpoint */ |
| unsigned short size; |
| unsigned short zero2; |
| /* driver data */ |
| struct sk_buff *skb; |
| struct i596_rbd *v_next; |
| u32 b_addr; /* This rbd addr from i596 view */ |
| unsigned char *v_data; /* Address from CPUs viewpoint */ |
| /* Total 32 bytes... */ |
| #ifdef __LP64__ |
| u32 cache_pad[4]; |
| #endif |
| }; |
| |
| /* These values as chosen so struct i596_dma fits in one page... */ |
| |
| #define TX_RING_SIZE 32 |
| #define RX_RING_SIZE 16 |
| |
| struct i596_scb { |
| unsigned short status; |
| unsigned short command; |
| u32 cmd; |
| u32 rfd; |
| u32 crc_err; |
| u32 align_err; |
| u32 resource_err; |
| u32 over_err; |
| u32 rcvdt_err; |
| u32 short_err; |
| unsigned short t_on; |
| unsigned short t_off; |
| }; |
| |
| struct i596_iscp { |
| u32 stat; |
| u32 scb; |
| }; |
| |
| struct i596_scp { |
| u32 sysbus; |
| u32 pad; |
| u32 iscp; |
| }; |
| |
| struct i596_dma { |
| struct i596_scp scp __attribute__((aligned(32))); |
| volatile struct i596_iscp iscp __attribute__((aligned(32))); |
| volatile struct i596_scb scb __attribute__((aligned(32))); |
| struct sa_cmd sa_cmd __attribute__((aligned(32))); |
| struct cf_cmd cf_cmd __attribute__((aligned(32))); |
| struct tdr_cmd tdr_cmd __attribute__((aligned(32))); |
| struct mc_cmd mc_cmd __attribute__((aligned(32))); |
| struct i596_rfd rfds[RX_RING_SIZE] __attribute__((aligned(32))); |
| struct i596_rbd rbds[RX_RING_SIZE] __attribute__((aligned(32))); |
| struct tx_cmd tx_cmds[TX_RING_SIZE] __attribute__((aligned(32))); |
| struct i596_tbd tbds[TX_RING_SIZE] __attribute__((aligned(32))); |
| }; |
| |
| struct i596_private { |
| struct i596_dma *dma; |
| u32 stat; |
| int last_restart; |
| struct i596_rfd *rfd_head; |
| struct i596_rbd *rbd_head; |
| struct i596_cmd *cmd_tail; |
| struct i596_cmd *cmd_head; |
| int cmd_backlog; |
| u32 last_cmd; |
| int next_tx_cmd; |
| int options; |
| spinlock_t lock; /* serialize access to chip */ |
| dma_addr_t dma_addr; |
| void __iomem *mpu_port; |
| void __iomem *ca; |
| }; |
| |
| static const char init_setup[] = |
| { |
| 0x8E, /* length, prefetch on */ |
| 0xC8, /* fifo to 8, monitor off */ |
| 0x80, /* don't save bad frames */ |
| 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); |
| static void print_eth(unsigned char *buf, char *str); |
| static void set_multicast_list(struct net_device *dev); |
| static inline void ca(struct net_device *dev); |
| static void mpu_port(struct net_device *dev, int c, dma_addr_t x); |
| |
| static int rx_ring_size = RX_RING_SIZE; |
| static int ticks_limit = 100; |
| static int max_cmd_backlog = TX_RING_SIZE-1; |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| static void i596_poll_controller(struct net_device *dev); |
| #endif |
| |
| |
| static inline int wait_istat(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str) |
| { |
| DMA_INV(dev, &(dma->iscp), sizeof(struct i596_iscp)); |
| while (--delcnt && dma->iscp.stat) { |
| udelay(10); |
| DMA_INV(dev, &(dma->iscp), sizeof(struct i596_iscp)); |
| } |
| if (!delcnt) { |
| printk(KERN_ERR "%s: %s, iscp.stat %04x, didn't clear\n", |
| dev->name, str, SWAP16(dma->iscp.stat)); |
| return -1; |
| } else |
| return 0; |
| } |
| |
| |
| static inline int wait_cmd(struct net_device *dev, struct i596_dma *dma, int delcnt, char *str) |
| { |
| DMA_INV(dev, &(dma->scb), sizeof(struct i596_scb)); |
| while (--delcnt && dma->scb.command) { |
| udelay(10); |
| DMA_INV(dev, &(dma->scb), sizeof(struct i596_scb)); |
| } |
| if (!delcnt) { |
| printk(KERN_ERR "%s: %s, status %4.4x, cmd %4.4x.\n", |
| dev->name, str, |
| SWAP16(dma->scb.status), |
| SWAP16(dma->scb.command)); |
| return -1; |
| } else |
| return 0; |
| } |
| |
| |
| static void i596_display_data(struct net_device *dev) |
| { |
| struct i596_private *lp = netdev_priv(dev); |
| struct i596_dma *dma = lp->dma; |
| struct i596_cmd *cmd; |
| struct i596_rfd *rfd; |
| struct i596_rbd *rbd; |
| |
| printk(KERN_DEBUG "lp and scp at %p, .sysbus = %08x, .iscp = %08x\n", |
| &dma->scp, dma->scp.sysbus, SWAP32(dma->scp.iscp)); |
| printk(KERN_DEBUG "iscp at %p, iscp.stat = %08x, .scb = %08x\n", |
| &dma->iscp, SWAP32(dma->iscp.stat), SWAP32(dma->iscp.scb)); |
| printk(KERN_DEBUG "scb at %p, scb.status = %04x, .command = %04x," |
| " .cmd = %08x, .rfd = %08x\n", |
| &dma->scb, SWAP16(dma->scb.status), SWAP16(dma->scb.command), |
| SWAP16(dma->scb.cmd), SWAP32(dma->scb.rfd)); |
| printk(KERN_DEBUG " errors: crc %x, align %x, resource %x," |
| " over %x, rcvdt %x, short %x\n", |
| SWAP32(dma->scb.crc_err), SWAP32(dma->scb.align_err), |
| SWAP32(dma->scb.resource_err), SWAP32(dma->scb.over_err), |
| SWAP32(dma->scb.rcvdt_err), SWAP32(dma->scb.short_err)); |
| cmd = lp->cmd_head; |
| while (cmd != NULL) { |
| printk(KERN_DEBUG |
| "cmd at %p, .status = %04x, .command = %04x," |
| " .b_next = %08x\n", |
| cmd, SWAP16(cmd->status), SWAP16(cmd->command), |
| SWAP32(cmd->b_next)); |
| cmd = cmd->v_next; |
| } |
| rfd = lp->rfd_head; |
| printk(KERN_DEBUG "rfd_head = %p\n", rfd); |
| do { |
| printk(KERN_DEBUG |
| " %p .stat %04x, .cmd %04x, b_next %08x, rbd %08x," |
| " count %04x\n", |
| rfd, SWAP16(rfd->stat), SWAP16(rfd->cmd), |
| SWAP32(rfd->b_next), SWAP32(rfd->rbd), |
| SWAP16(rfd->count)); |
| rfd = rfd->v_next; |
| } while (rfd != lp->rfd_head); |
| rbd = lp->rbd_head; |
| printk(KERN_DEBUG "rbd_head = %p\n", rbd); |
| do { |
| printk(KERN_DEBUG |
| " %p .count %04x, b_next %08x, b_data %08x," |
| " size %04x\n", |
| rbd, SWAP16(rbd->count), SWAP32(rbd->b_next), |
| SWAP32(rbd->b_data), SWAP16(rbd->size)); |
| rbd = rbd->v_next; |
| } while (rbd != lp->rbd_head); |
| DMA_INV(dev, dma, sizeof(struct i596_dma)); |
| } |
| |
| |
| #define virt_to_dma(lp, v) ((lp)->dma_addr + (dma_addr_t)((unsigned long)(v)-(unsigned long)((lp)->dma))) |
| |
| static inline int init_rx_bufs(struct net_device *dev) |
| { |
| struct i596_private *lp = netdev_priv(dev); |
| struct i596_dma *dma = lp->dma; |
| int i; |
| struct i596_rfd *rfd; |
| struct i596_rbd *rbd; |
| |
| /* First build the Receive Buffer Descriptor List */ |
| |
| for (i = 0, rbd = dma->rbds; i < rx_ring_size; i++, rbd++) { |
| dma_addr_t dma_addr; |
| struct sk_buff *skb; |
| |
| skb = netdev_alloc_skb_ip_align(dev, PKT_BUF_SZ); |
| if (skb == NULL) |
| return -1; |
| dma_addr = dma_map_single(dev->dev.parent, skb->data, |
| PKT_BUF_SZ, DMA_FROM_DEVICE); |
| rbd->v_next = rbd+1; |
| rbd->b_next = SWAP32(virt_to_dma(lp, rbd+1)); |
| rbd->b_addr = SWAP32(virt_to_dma(lp, rbd)); |
| rbd->skb = skb; |
| rbd->v_data = skb->data; |
| rbd->b_data = SWAP32(dma_addr); |
| rbd->size = SWAP16(PKT_BUF_SZ); |
| } |
| lp->rbd_head = dma->rbds; |
| rbd = dma->rbds + rx_ring_size - 1; |
| rbd->v_next = dma->rbds; |
| rbd->b_next = SWAP32(virt_to_dma(lp, dma->rbds)); |
| |
| /* Now build the Receive Frame Descriptor List */ |
| |
| for (i = 0, rfd = dma->rfds; i < rx_ring_size; i++, rfd++) { |
| rfd->rbd = I596_NULL; |
| rfd->v_next = rfd+1; |
| rfd->v_prev = rfd-1; |
| rfd->b_next = SWAP32(virt_to_dma(lp, rfd+1)); |
| rfd->cmd = SWAP16(CMD_FLEX); |
| } |
| lp->rfd_head = dma->rfds; |
| dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); |
| rfd = dma->rfds; |
| rfd->rbd = SWAP32(virt_to_dma(lp, lp->rbd_head)); |
| rfd->v_prev = dma->rfds + rx_ring_size - 1; |
| rfd = dma->rfds + rx_ring_size - 1; |
| rfd->v_next = dma->rfds; |
| rfd->b_next = SWAP32(virt_to_dma(lp, dma->rfds)); |
| rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX); |
| |
| DMA_WBACK_INV(dev, dma, sizeof(struct i596_dma)); |
| return 0; |
| } |
| |
| static inline void remove_rx_bufs(struct net_device *dev) |
| { |
| struct i596_private *lp = netdev_priv(dev); |
| struct i596_rbd *rbd; |
| int i; |
| |
| for (i = 0, rbd = lp->dma->rbds; i < rx_ring_size; i++, rbd++) { |
| if (rbd->skb == NULL) |
| break; |
| dma_unmap_single(dev->dev.parent, |
| (dma_addr_t)SWAP32(rbd->b_data), |
| PKT_BUF_SZ, DMA_FROM_DEVICE); |
| dev_kfree_skb(rbd->skb); |
| } |
| } |
| |
| |
| static void rebuild_rx_bufs(struct net_device *dev) |
| { |
| struct i596_private *lp = netdev_priv(dev); |
| struct i596_dma *dma = lp->dma; |
| int i; |
| |
| /* Ensure rx frame/buffer descriptors are tidy */ |
| |
| for (i = 0; i < rx_ring_size; i++) { |
| dma->rfds[i].rbd = I596_NULL; |
| dma->rfds[i].cmd = SWAP16(CMD_FLEX); |
| } |
| dma->rfds[rx_ring_size-1].cmd = SWAP16(CMD_EOL|CMD_FLEX); |
| lp->rfd_head = dma->rfds; |
| dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); |
| lp->rbd_head = dma->rbds; |
| dma->rfds[0].rbd = SWAP32(virt_to_dma(lp, dma->rbds)); |
| |
| DMA_WBACK_INV(dev, dma, sizeof(struct i596_dma)); |
| } |
| |
| |
| static int init_i596_mem(struct net_device *dev) |
| { |
| struct i596_private *lp = netdev_priv(dev); |
| struct i596_dma *dma = lp->dma; |
| unsigned long flags; |
| |
| mpu_port(dev, PORT_RESET, 0); |
| udelay(100); /* Wait 100us - seems to help */ |
| |
| /* change the scp address */ |
| |
| lp->last_cmd = jiffies; |
| |
| dma->scp.sysbus = SYSBUS; |
| dma->scp.iscp = SWAP32(virt_to_dma(lp, &(dma->iscp))); |
| dma->iscp.scb = SWAP32(virt_to_dma(lp, &(dma->scb))); |
| dma->iscp.stat = SWAP32(ISCP_BUSY); |
| lp->cmd_backlog = 0; |
| |
| lp->cmd_head = NULL; |
| dma->scb.cmd = I596_NULL; |
| |
| DEB(DEB_INIT, printk(KERN_DEBUG "%s: starting i82596.\n", dev->name)); |
| |
| DMA_WBACK(dev, &(dma->scp), sizeof(struct i596_scp)); |
| DMA_WBACK(dev, &(dma->iscp), sizeof(struct i596_iscp)); |
| DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb)); |
| |
| mpu_port(dev, PORT_ALTSCP, virt_to_dma(lp, &dma->scp)); |
| ca(dev); |
| if (wait_istat(dev, dma, 1000, "initialization timed out")) |
| goto failed; |
| DEB(DEB_INIT, printk(KERN_DEBUG |
| "%s: i82596 initialization successful\n", |
| dev->name)); |
| |
| if (request_irq(dev->irq, i596_interrupt, 0, "i82596", dev)) { |
| printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq); |
| goto failed; |
| } |
| |
| /* Ensure rx frame/buffer descriptors are tidy */ |
| rebuild_rx_bufs(dev); |
| |
| dma->scb.command = 0; |
| DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb)); |
| |
| DEB(DEB_INIT, printk(KERN_DEBUG |
| "%s: queuing CmdConfigure\n", dev->name)); |
| memcpy(dma->cf_cmd.i596_config, init_setup, 14); |
| dma->cf_cmd.cmd.command = SWAP16(CmdConfigure); |
| DMA_WBACK(dev, &(dma->cf_cmd), sizeof(struct cf_cmd)); |
| i596_add_cmd(dev, &dma->cf_cmd.cmd); |
| |
| DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdSASetup\n", dev->name)); |
| memcpy(dma->sa_cmd.eth_addr, dev->dev_addr, ETH_ALEN); |
| dma->sa_cmd.cmd.command = SWAP16(CmdSASetup); |
| DMA_WBACK(dev, &(dma->sa_cmd), sizeof(struct sa_cmd)); |
| i596_add_cmd(dev, &dma->sa_cmd.cmd); |
| |
| DEB(DEB_INIT, printk(KERN_DEBUG "%s: queuing CmdTDR\n", dev->name)); |
| dma->tdr_cmd.cmd.command = SWAP16(CmdTDR); |
| DMA_WBACK(dev, &(dma->tdr_cmd), sizeof(struct tdr_cmd)); |
| i596_add_cmd(dev, &dma->tdr_cmd.cmd); |
| |
| spin_lock_irqsave (&lp->lock, flags); |
| |
| if (wait_cmd(dev, dma, 1000, "timed out waiting to issue RX_START")) { |
| spin_unlock_irqrestore (&lp->lock, flags); |
| goto failed_free_irq; |
| } |
| DEB(DEB_INIT, printk(KERN_DEBUG "%s: Issuing RX_START\n", dev->name)); |
| dma->scb.command = SWAP16(RX_START); |
| dma->scb.rfd = SWAP32(virt_to_dma(lp, dma->rfds)); |
| DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb)); |
| |
| ca(dev); |
| |
| spin_unlock_irqrestore (&lp->lock, flags); |
| if (wait_cmd(dev, dma, 1000, "RX_START not processed")) |
| goto failed_free_irq; |
| DEB(DEB_INIT, printk(KERN_DEBUG |
| "%s: Receive unit started OK\n", dev->name)); |
| return 0; |
| |
| failed_free_irq: |
| free_irq(dev->irq, dev); |
| failed: |
| printk(KERN_ERR "%s: Failed to initialise 82596\n", dev->name); |
| mpu_port(dev, PORT_RESET, 0); |
| return -1; |
| } |
| |
| |
| static inline int i596_rx(struct net_device *dev) |
| { |
| struct i596_private *lp = netdev_priv(dev); |
| 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 */ |
| |
| DMA_INV(dev, rfd, sizeof(struct i596_rfd)); |
| while (rfd->stat & SWAP16(STAT_C)) { /* Loop while complete frames */ |
| if (rfd->rbd == I596_NULL) |
| rbd = NULL; |
| else if (rfd->rbd == lp->rbd_head->b_addr) { |
| rbd = lp->rbd_head; |
| DMA_INV(dev, rbd, sizeof(struct i596_rbd)); |
| } else { |
| printk(KERN_ERR "%s: rbd chain broken!\n", dev->name); |
| /* XXX Now what? */ |
| rbd = NULL; |
| } |
| DEB(DEB_RXFRAME, printk(KERN_DEBUG |
| " rfd %p, rfd.rbd %08x, rfd.stat %04x\n", |
| rfd, rfd->rbd, rfd->stat)); |
| |
| if (rbd != NULL && (rfd->stat & SWAP16(STAT_OK))) { |
| /* a good frame */ |
| int pkt_len = SWAP16(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; |
| dma_addr_t dma_addr; |
| |
| dma_unmap_single(dev->dev.parent, |
| (dma_addr_t)SWAP32(rbd->b_data), |
| PKT_BUF_SZ, DMA_FROM_DEVICE); |
| /* Get fresh skbuff to replace filled one. */ |
| newskb = netdev_alloc_skb_ip_align(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; |
| dma_addr = dma_map_single(dev->dev.parent, |
| newskb->data, |
| PKT_BUF_SZ, |
| DMA_FROM_DEVICE); |
| rbd->v_data = newskb->data; |
| rbd->b_data = SWAP32(dma_addr); |
| DMA_WBACK_INV(dev, rbd, sizeof(struct i596_rbd)); |
| } else { |
| skb = netdev_alloc_skb_ip_align(dev, pkt_len); |
| } |
| 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 */ |
| dma_sync_single_for_cpu(dev->dev.parent, |
| (dma_addr_t)SWAP32(rbd->b_data), |
| PKT_BUF_SZ, DMA_FROM_DEVICE); |
| skb_put_data(skb, rbd->v_data, |
| pkt_len); |
| dma_sync_single_for_device(dev->dev.parent, |
| (dma_addr_t)SWAP32(rbd->b_data), |
| PKT_BUF_SZ, DMA_FROM_DEVICE); |
| } |
| skb->len = pkt_len; |
| skb->protocol = eth_type_trans(skb, dev); |
| 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 & SWAP16(0x0100)) |
| dev->stats.collisions++; |
| if (rfd->stat & SWAP16(0x8000)) |
| dev->stats.rx_length_errors++; |
| if (rfd->stat & SWAP16(0x0001)) |
| dev->stats.rx_over_errors++; |
| if (rfd->stat & SWAP16(0x0002)) |
| dev->stats.rx_fifo_errors++; |
| if (rfd->stat & SWAP16(0x0004)) |
| dev->stats.rx_frame_errors++; |
| if (rfd->stat & SWAP16(0x0008)) |
| dev->stats.rx_crc_errors++; |
| if (rfd->stat & SWAP16(0x0010)) |
| dev->stats.rx_length_errors++; |
| } |
| |
| /* Clear the buffer descriptor count and EOF + F flags */ |
| |
| if (rbd != NULL && (rbd->count & SWAP16(0x4000))) { |
| rbd->count = 0; |
| lp->rbd_head = rbd->v_next; |
| DMA_WBACK_INV(dev, rbd, sizeof(struct i596_rbd)); |
| } |
| |
| /* Tidy the frame descriptor, marking it as end of list */ |
| |
| rfd->rbd = I596_NULL; |
| rfd->stat = 0; |
| rfd->cmd = SWAP16(CMD_EOL|CMD_FLEX); |
| rfd->count = 0; |
| |
| /* Update record of next frame descriptor to process */ |
| |
| lp->dma->scb.rfd = rfd->b_next; |
| lp->rfd_head = rfd->v_next; |
| DMA_WBACK_INV(dev, rfd, sizeof(struct i596_rfd)); |
| |
| /* Remove end-of-list from old end descriptor */ |
| |
| rfd->v_prev->cmd = SWAP16(CMD_FLEX); |
| DMA_WBACK_INV(dev, rfd->v_prev, sizeof(struct i596_rfd)); |
| rfd = lp->rfd_head; |
| DMA_INV(dev, rfd, sizeof(struct i596_rfd)); |
| } |
| |
| DEB(DEB_RXFRAME, printk(KERN_DEBUG "frames %d\n", frames)); |
| |
| return 0; |
| } |
| |
| |
| static inline void i596_cleanup_cmd(struct net_device *dev, struct i596_private *lp) |
| { |
| struct i596_cmd *ptr; |
| |
| while (lp->cmd_head != NULL) { |
| ptr = lp->cmd_head; |
| lp->cmd_head = ptr->v_next; |
| lp->cmd_backlog--; |
| |
| switch (SWAP16(ptr->command) & 0x7) { |
| case CmdTx: |
| { |
| struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; |
| struct sk_buff *skb = tx_cmd->skb; |
| dma_unmap_single(dev->dev.parent, |
| tx_cmd->dma_addr, |
| skb->len, DMA_TO_DEVICE); |
| |
| dev_kfree_skb(skb); |
| |
| dev->stats.tx_errors++; |
| dev->stats.tx_aborted_errors++; |
| |
| ptr->v_next = NULL; |
| ptr->b_next = I596_NULL; |
| tx_cmd->cmd.command = 0; /* Mark as free */ |
| break; |
| } |
| default: |
| ptr->v_next = NULL; |
| ptr->b_next = I596_NULL; |
| } |
| DMA_WBACK_INV(dev, ptr, sizeof(struct i596_cmd)); |
| } |
| |
| wait_cmd(dev, lp->dma, 100, "i596_cleanup_cmd timed out"); |
| lp->dma->scb.cmd = I596_NULL; |
| DMA_WBACK(dev, &(lp->dma->scb), sizeof(struct i596_scb)); |
| } |
| |
| |
| static inline void i596_reset(struct net_device *dev, struct i596_private *lp) |
| { |
| unsigned long flags; |
| |
| DEB(DEB_RESET, printk(KERN_DEBUG "i596_reset\n")); |
| |
| spin_lock_irqsave (&lp->lock, flags); |
| |
| wait_cmd(dev, lp->dma, 100, "i596_reset timed out"); |
| |
| netif_stop_queue(dev); |
| |
| /* FIXME: this command might cause an lpmc */ |
| lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT); |
| DMA_WBACK(dev, &(lp->dma->scb), sizeof(struct i596_scb)); |
| ca(dev); |
| |
| /* wait for shutdown */ |
| wait_cmd(dev, lp->dma, 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 = netdev_priv(dev); |
| struct i596_dma *dma = lp->dma; |
| unsigned long flags; |
| |
| DEB(DEB_ADDCMD, printk(KERN_DEBUG "i596_add_cmd cmd_head %p\n", |
| lp->cmd_head)); |
| |
| cmd->status = 0; |
| cmd->command |= SWAP16(CMD_EOL | CMD_INTR); |
| cmd->v_next = NULL; |
| cmd->b_next = I596_NULL; |
| DMA_WBACK(dev, cmd, sizeof(struct i596_cmd)); |
| |
| spin_lock_irqsave (&lp->lock, flags); |
| |
| if (lp->cmd_head != NULL) { |
| lp->cmd_tail->v_next = cmd; |
| lp->cmd_tail->b_next = SWAP32(virt_to_dma(lp, &cmd->status)); |
| DMA_WBACK(dev, lp->cmd_tail, sizeof(struct i596_cmd)); |
| } else { |
| lp->cmd_head = cmd; |
| wait_cmd(dev, dma, 100, "i596_add_cmd timed out"); |
| dma->scb.cmd = SWAP32(virt_to_dma(lp, &cmd->status)); |
| dma->scb.command = SWAP16(CUC_START); |
| DMA_WBACK(dev, &(dma->scb), sizeof(struct i596_scb)); |
| 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_ERR |
| "%s: command unit timed out, status resetting.\n", |
| dev->name); |
| #if 1 |
| i596_reset(dev, lp); |
| #endif |
| } |
| } |
| |
| static int i596_open(struct net_device *dev) |
| { |
| DEB(DEB_OPEN, printk(KERN_DEBUG |
| "%s: i596_open() irq %d.\n", dev->name, dev->irq)); |
| |
| if (init_rx_bufs(dev)) { |
| printk(KERN_ERR "%s: Failed to init rx bufs\n", dev->name); |
| return -EAGAIN; |
| } |
| if (init_i596_mem(dev)) { |
| printk(KERN_ERR "%s: Failed to init memory\n", dev->name); |
| goto out_remove_rx_bufs; |
| } |
| netif_start_queue(dev); |
| |
| return 0; |
| |
| out_remove_rx_bufs: |
| remove_rx_bufs(dev); |
| return -EAGAIN; |
| } |
| |
| static void i596_tx_timeout (struct net_device *dev) |
| { |
| struct i596_private *lp = netdev_priv(dev); |
| |
| /* Transmitter timeout, serious problems. */ |
| DEB(DEB_ERRORS, printk(KERN_DEBUG |
| "%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_DEBUG "Resetting board.\n")); |
| /* Shutdown and restart */ |
| i596_reset (dev, lp); |
| } else { |
| /* Issue a channel attention signal */ |
| DEB(DEB_ERRORS, printk(KERN_DEBUG "Kicking board.\n")); |
| lp->dma->scb.command = SWAP16(CUC_START | RX_START); |
| DMA_WBACK_INV(dev, &(lp->dma->scb), sizeof(struct i596_scb)); |
| 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 = netdev_priv(dev); |
| 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 (length < ETH_ZLEN) { |
| if (skb_padto(skb, ETH_ZLEN)) |
| return NETDEV_TX_OK; |
| length = ETH_ZLEN; |
| } |
| |
| netif_stop_queue(dev); |
| |
| tx_cmd = lp->dma->tx_cmds + lp->next_tx_cmd; |
| tbd = lp->dma->tbds + lp->next_tx_cmd; |
| |
| if (tx_cmd->cmd.command) { |
| DEB(DEB_ERRORS, printk(KERN_DEBUG |
| "%s: xmit ring full, dropping packet.\n", |
| dev->name)); |
| dev->stats.tx_dropped++; |
| |
| dev_kfree_skb_any(skb); |
| } else { |
| if (++lp->next_tx_cmd == TX_RING_SIZE) |
| lp->next_tx_cmd = 0; |
| tx_cmd->tbd = SWAP32(virt_to_dma(lp, tbd)); |
| tbd->next = I596_NULL; |
| |
| tx_cmd->cmd.command = SWAP16(CMD_FLEX | CmdTx); |
| tx_cmd->skb = skb; |
| |
| tx_cmd->pad = 0; |
| tx_cmd->size = 0; |
| tbd->pad = 0; |
| tbd->size = SWAP16(EOF | length); |
| |
| tx_cmd->dma_addr = dma_map_single(dev->dev.parent, skb->data, |
| skb->len, DMA_TO_DEVICE); |
| tbd->data = SWAP32(tx_cmd->dma_addr); |
| |
| DEB(DEB_TXADDR, print_eth(skb->data, "tx-queued")); |
| DMA_WBACK_INV(dev, tx_cmd, sizeof(struct tx_cmd)); |
| DMA_WBACK_INV(dev, tbd, sizeof(struct i596_tbd)); |
| 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_validate_addr = eth_validate_addr, |
| .ndo_set_mac_address = eth_mac_addr, |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| .ndo_poll_controller = i596_poll_controller, |
| #endif |
| }; |
| |
| static int i82596_probe(struct net_device *dev) |
| { |
| int i; |
| struct i596_private *lp = netdev_priv(dev); |
| struct i596_dma *dma; |
| |
| /* This lot is ensure things have been cache line aligned. */ |
| BUILD_BUG_ON(sizeof(struct i596_rfd) != 32); |
| BUILD_BUG_ON(sizeof(struct i596_rbd) & 31); |
| BUILD_BUG_ON(sizeof(struct tx_cmd) & 31); |
| BUILD_BUG_ON(sizeof(struct i596_tbd) != 32); |
| #ifndef __LP64__ |
| BUILD_BUG_ON(sizeof(struct i596_dma) > 4096); |
| #endif |
| |
| if (!dev->base_addr || !dev->irq) |
| return -ENODEV; |
| |
| dma = dma_alloc_attrs(dev->dev.parent, sizeof(struct i596_dma), |
| &lp->dma_addr, GFP_KERNEL, |
| DMA_ATTR_NON_CONSISTENT); |
| if (!dma) { |
| printk(KERN_ERR "%s: Couldn't get shared memory\n", __FILE__); |
| return -ENOMEM; |
| } |
| |
| dev->netdev_ops = &i596_netdev_ops; |
| dev->watchdog_timeo = TX_TIMEOUT; |
| |
| memset(dma, 0, sizeof(struct i596_dma)); |
| lp->dma = dma; |
| |
| dma->scb.command = 0; |
| dma->scb.cmd = I596_NULL; |
| dma->scb.rfd = I596_NULL; |
| spin_lock_init(&lp->lock); |
| |
| DMA_WBACK_INV(dev, dma, sizeof(struct i596_dma)); |
| |
| i = register_netdev(dev); |
| if (i) { |
| dma_free_attrs(dev->dev.parent, sizeof(struct i596_dma), |
| dma, lp->dma_addr, DMA_ATTR_NON_CONSISTENT); |
| return i; |
| } |
| |
| DEB(DEB_PROBE, printk(KERN_INFO "%s: 82596 at %#3lx, %pM IRQ %d.\n", |
| dev->name, dev->base_addr, dev->dev_addr, |
| dev->irq)); |
| DEB(DEB_INIT, printk(KERN_INFO |
| "%s: dma at 0x%p (%d bytes), lp->scb at 0x%p\n", |
| dev->name, dma, (int)sizeof(struct i596_dma), |
| &dma->scb)); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| static void i596_poll_controller(struct net_device *dev) |
| { |
| disable_irq(dev->irq); |
| i596_interrupt(dev->irq, dev); |
| enable_irq(dev->irq); |
| } |
| #endif |
| |
| static irqreturn_t i596_interrupt(int irq, void *dev_id) |
| { |
| struct net_device *dev = dev_id; |
| struct i596_private *lp; |
| struct i596_dma *dma; |
| unsigned short status, ack_cmd = 0; |
| |
| lp = netdev_priv(dev); |
| dma = lp->dma; |
| |
| spin_lock (&lp->lock); |
| |
| wait_cmd(dev, dma, 100, "i596 interrupt, timeout"); |
| status = SWAP16(dma->scb.status); |
| |
| DEB(DEB_INTS, printk(KERN_DEBUG |
| "%s: i596 interrupt, IRQ %d, status %4.4x.\n", |
| dev->name, dev->irq, status)); |
| |
| ack_cmd = status & 0xf000; |
| |
| if (!ack_cmd) { |
| DEB(DEB_ERRORS, printk(KERN_DEBUG |
| "%s: interrupt with no events\n", |
| dev->name)); |
| spin_unlock (&lp->lock); |
| return IRQ_NONE; |
| } |
| |
| if ((status & 0x8000) || (status & 0x2000)) { |
| struct i596_cmd *ptr; |
| |
| 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 != NULL) { |
| DMA_INV(dev, lp->cmd_head, sizeof(struct i596_cmd)); |
| if (!(lp->cmd_head->status & SWAP16(STAT_C))) |
| break; |
| |
| ptr = lp->cmd_head; |
| |
| DEB(DEB_STATUS, |
| printk(KERN_DEBUG |
| "cmd_head->status = %04x, ->command = %04x\n", |
| SWAP16(lp->cmd_head->status), |
| SWAP16(lp->cmd_head->command))); |
| lp->cmd_head = ptr->v_next; |
| lp->cmd_backlog--; |
| |
| switch (SWAP16(ptr->command) & 0x7) { |
| case CmdTx: |
| { |
| struct tx_cmd *tx_cmd = (struct tx_cmd *) ptr; |
| struct sk_buff *skb = tx_cmd->skb; |
| |
| if (ptr->status & SWAP16(STAT_OK)) { |
| DEB(DEB_TXADDR, |
| print_eth(skb->data, "tx-done")); |
| } else { |
| dev->stats.tx_errors++; |
| if (ptr->status & SWAP16(0x0020)) |
| dev->stats.collisions++; |
| if (!(ptr->status & SWAP16(0x0040))) |
| dev->stats.tx_heartbeat_errors++; |
| if (ptr->status & SWAP16(0x0400)) |
| dev->stats.tx_carrier_errors++; |
| if (ptr->status & SWAP16(0x0800)) |
| dev->stats.collisions++; |
| if (ptr->status & SWAP16(0x1000)) |
| dev->stats.tx_aborted_errors++; |
| } |
| dma_unmap_single(dev->dev.parent, |
| tx_cmd->dma_addr, |
| skb->len, DMA_TO_DEVICE); |
| dev_consume_skb_irq(skb); |
| |
| tx_cmd->cmd.command = 0; /* Mark free */ |
| break; |
| } |
| case CmdTDR: |
| { |
| unsigned short status = SWAP16(((struct tdr_cmd *)ptr)->status); |
| |
| if (status & 0x8000) { |
| DEB(DEB_ANY, |
| printk(KERN_DEBUG "%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_DEBUG "%s: Time %d.\n", |
| dev->name, status & 0x07ff)); |
| } |
| break; |
| } |
| case CmdConfigure: |
| /* |
| * Zap command so set_multicast_list() know |
| * it is free |
| */ |
| ptr->command = 0; |
| break; |
| } |
| ptr->v_next = NULL; |
| ptr->b_next = I596_NULL; |
| DMA_WBACK(dev, ptr, sizeof(struct i596_cmd)); |
| lp->last_cmd = jiffies; |
| } |
| |
| /* This mess is arranging that only the last of any outstanding |
| * commands has the interrupt bit set. Should probably really |
| * only add to the cmd queue when the CU is stopped. |
| */ |
| ptr = lp->cmd_head; |
| while ((ptr != NULL) && (ptr != lp->cmd_tail)) { |
| struct i596_cmd *prev = ptr; |
| |
| ptr->command &= SWAP16(0x1fff); |
| ptr = ptr->v_next; |
| DMA_WBACK_INV(dev, prev, sizeof(struct i596_cmd)); |
| } |
| |
| if (lp->cmd_head != NULL) |
| ack_cmd |= CUC_START; |
| dma->scb.cmd = SWAP32(virt_to_dma(lp, &lp->cmd_head->status)); |
| DMA_WBACK_INV(dev, &dma->scb, sizeof(struct i596_scb)); |
| } |
| 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_DEBUG |
| "%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, dma, 100, "i596 interrupt, timeout"); |
| dma->scb.command = SWAP16(ack_cmd); |
| DMA_WBACK(dev, &dma->scb, sizeof(struct i596_scb)); |
| |
| /* DANGER: I suspect that some kind of interrupt |
| acknowledgement aside from acking the 82596 might be needed |
| here... but it's running acceptably without */ |
| |
| ca(dev); |
| |
| wait_cmd(dev, dma, 100, "i596 interrupt, exit timeout"); |
| DEB(DEB_INTS, printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name)); |
| |
| spin_unlock (&lp->lock); |
| return IRQ_HANDLED; |
| } |
| |
| static int i596_close(struct net_device *dev) |
| { |
| struct i596_private *lp = netdev_priv(dev); |
| unsigned long flags; |
| |
| netif_stop_queue(dev); |
| |
| DEB(DEB_INIT, |
| printk(KERN_DEBUG |
| "%s: Shutting down ethercard, status was %4.4x.\n", |
| dev->name, SWAP16(lp->dma->scb.status))); |
| |
| spin_lock_irqsave(&lp->lock, flags); |
| |
| wait_cmd(dev, lp->dma, 100, "close1 timed out"); |
| lp->dma->scb.command = SWAP16(CUC_ABORT | RX_ABORT); |
| DMA_WBACK(dev, &lp->dma->scb, sizeof(struct i596_scb)); |
| |
| ca(dev); |
| |
| wait_cmd(dev, lp->dma, 100, "close2 timed out"); |
| spin_unlock_irqrestore(&lp->lock, flags); |
| DEB(DEB_STRUCT, i596_display_data(dev)); |
| i596_cleanup_cmd(dev, lp); |
| |
| 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 = netdev_priv(dev); |
| struct i596_dma *dma = lp->dma; |
| 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 ((dev->flags & IFF_PROMISC) && |
| !(dma->cf_cmd.i596_config[8] & 0x01)) { |
| dma->cf_cmd.i596_config[8] |= 0x01; |
| config = 1; |
| } |
| if (!(dev->flags & IFF_PROMISC) && |
| (dma->cf_cmd.i596_config[8] & 0x01)) { |
| dma->cf_cmd.i596_config[8] &= ~0x01; |
| config = 1; |
| } |
| if ((dev->flags & IFF_ALLMULTI) && |
| (dma->cf_cmd.i596_config[11] & 0x20)) { |
| dma->cf_cmd.i596_config[11] &= ~0x20; |
| config = 1; |
| } |
| if (!(dev->flags & IFF_ALLMULTI) && |
| !(dma->cf_cmd.i596_config[11] & 0x20)) { |
| dma->cf_cmd.i596_config[11] |= 0x20; |
| config = 1; |
| } |
| if (config) { |
| if (dma->cf_cmd.cmd.command) |
| printk(KERN_INFO |
| "%s: config change request already queued\n", |
| dev->name); |
| else { |
| dma->cf_cmd.cmd.command = SWAP16(CmdConfigure); |
| DMA_WBACK_INV(dev, &dma->cf_cmd, sizeof(struct cf_cmd)); |
| i596_add_cmd(dev, &dma->cf_cmd.cmd); |
| } |
| } |
| |
| cnt = netdev_mc_count(dev); |
| if (cnt > MAX_MC_CNT) { |
| cnt = MAX_MC_CNT; |
| printk(KERN_NOTICE "%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; |
| |
| cmd = &dma->mc_cmd; |
| cmd->cmd.command = SWAP16(CmdMulticastList); |
| cmd->mc_cnt = SWAP16(netdev_mc_count(dev) * 6); |
| 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_DEBUG |
| "%s: Adding address %pM\n", |
| dev->name, cp)); |
| cp += ETH_ALEN; |
| } |
| DMA_WBACK_INV(dev, &dma->mc_cmd, sizeof(struct mc_cmd)); |
| i596_add_cmd(dev, &cmd->cmd); |
| } |
| } |