aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/i825xx/lib82596.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/ethernet/i825xx/lib82596.c')
-rw-r--r--drivers/net/ethernet/i825xx/lib82596.c1412
1 files changed, 1412 insertions, 0 deletions
diff --git a/drivers/net/ethernet/i825xx/lib82596.c b/drivers/net/ethernet/i825xx/lib82596.c
new file mode 100644
index 000000000000..3efbd8dbb63d
--- /dev/null
+++ b/drivers/net/ethernet/i825xx/lib82596.c
@@ -0,0 +1,1412 @@
+/* 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/init.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 int 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, 6);
+ 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!! */
+ printk(KERN_ERR
+ "%s: i596_rx Memory squeeze, dropping packet.\n",
+ dev->name);
+ 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);
+ memcpy(skb_put(skb, pkt_len), 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;
+ }
+
+ dev->trans_start = jiffies; /* prevent tx timeout */
+ netif_wake_queue (dev);
+}
+
+
+static int 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(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_change_mtu = eth_change_mtu,
+ .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 __devinit 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 = (struct i596_dma *) DMA_ALLOC(dev->dev.parent,
+ sizeof(struct i596_dma), &lp->dma_addr, GFP_KERNEL);
+ 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(dev->dev.parent, sizeof(struct i596_dma),
+ (void *)dma, lp->dma_addr);
+ 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_kfree_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, 6);
+ if (i596_debug > 1)
+ DEB(DEB_MULTI,
+ printk(KERN_DEBUG
+ "%s: Adding address %pM\n",
+ dev->name, cp));
+ cp += 6;
+ }
+ DMA_WBACK_INV(dev, &dma->mc_cmd, sizeof(struct mc_cmd));
+ i596_add_cmd(dev, &cmd->cmd);
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-26 20:34:26 +0000