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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
To clearly state the intent of copying from linear sk_buffs, _offset being a overly long variant but interesting for the sake of saving some bytes. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1178 lines
32 KiB
C
1178 lines
32 KiB
C
/* myri_sbus.c: MyriCOM MyriNET SBUS card driver.
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*
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* Copyright (C) 1996, 1999, 2006 David S. Miller (davem@davemloft.net)
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*/
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static char version[] =
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"myri_sbus.c:v2.0 June 23, 2006 David S. Miller (davem@davemloft.net)\n";
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/in.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/bitops.h>
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#include <net/dst.h>
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#include <net/arp.h>
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#include <net/sock.h>
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#include <net/ipv6.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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#include <asm/byteorder.h>
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#include <asm/idprom.h>
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#include <asm/sbus.h>
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#include <asm/openprom.h>
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#include <asm/oplib.h>
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#include <asm/auxio.h>
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#include <asm/pgtable.h>
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#include <asm/irq.h>
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#include "myri_sbus.h"
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#include "myri_code.h"
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/* #define DEBUG_DETECT */
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/* #define DEBUG_IRQ */
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/* #define DEBUG_TRANSMIT */
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/* #define DEBUG_RECEIVE */
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/* #define DEBUG_HEADER */
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#ifdef DEBUG_DETECT
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#define DET(x) printk x
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#else
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#define DET(x)
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#endif
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#ifdef DEBUG_IRQ
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#define DIRQ(x) printk x
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#else
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#define DIRQ(x)
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#endif
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#ifdef DEBUG_TRANSMIT
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#define DTX(x) printk x
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#else
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#define DTX(x)
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#endif
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#ifdef DEBUG_RECEIVE
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#define DRX(x) printk x
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#else
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#define DRX(x)
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#endif
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#ifdef DEBUG_HEADER
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#define DHDR(x) printk x
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#else
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#define DHDR(x)
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#endif
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static void myri_reset_off(void __iomem *lp, void __iomem *cregs)
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{
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/* Clear IRQ mask. */
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sbus_writel(0, lp + LANAI_EIMASK);
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/* Turn RESET function off. */
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sbus_writel(CONTROL_ROFF, cregs + MYRICTRL_CTRL);
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}
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static void myri_reset_on(void __iomem *cregs)
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{
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/* Enable RESET function. */
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sbus_writel(CONTROL_RON, cregs + MYRICTRL_CTRL);
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/* Disable IRQ's. */
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sbus_writel(CONTROL_DIRQ, cregs + MYRICTRL_CTRL);
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}
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static void myri_disable_irq(void __iomem *lp, void __iomem *cregs)
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{
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sbus_writel(CONTROL_DIRQ, cregs + MYRICTRL_CTRL);
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sbus_writel(0, lp + LANAI_EIMASK);
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sbus_writel(ISTAT_HOST, lp + LANAI_ISTAT);
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}
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static void myri_enable_irq(void __iomem *lp, void __iomem *cregs)
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{
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sbus_writel(CONTROL_EIRQ, cregs + MYRICTRL_CTRL);
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sbus_writel(ISTAT_HOST, lp + LANAI_EIMASK);
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}
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static inline void bang_the_chip(struct myri_eth *mp)
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{
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struct myri_shmem __iomem *shmem = mp->shmem;
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void __iomem *cregs = mp->cregs;
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sbus_writel(1, &shmem->send);
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sbus_writel(CONTROL_WON, cregs + MYRICTRL_CTRL);
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}
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static int myri_do_handshake(struct myri_eth *mp)
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{
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struct myri_shmem __iomem *shmem = mp->shmem;
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void __iomem *cregs = mp->cregs;
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struct myri_channel __iomem *chan = &shmem->channel;
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int tick = 0;
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DET(("myri_do_handshake: "));
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if (sbus_readl(&chan->state) == STATE_READY) {
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DET(("Already STATE_READY, failed.\n"));
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return -1; /* We're hosed... */
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}
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myri_disable_irq(mp->lregs, cregs);
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while (tick++ <= 25) {
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u32 softstate;
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/* Wake it up. */
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DET(("shakedown, CONTROL_WON, "));
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sbus_writel(1, &shmem->shakedown);
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sbus_writel(CONTROL_WON, cregs + MYRICTRL_CTRL);
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softstate = sbus_readl(&chan->state);
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DET(("chanstate[%08x] ", softstate));
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if (softstate == STATE_READY) {
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DET(("wakeup successful, "));
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break;
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}
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if (softstate != STATE_WFN) {
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DET(("not WFN setting that, "));
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sbus_writel(STATE_WFN, &chan->state);
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}
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udelay(20);
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}
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myri_enable_irq(mp->lregs, cregs);
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if (tick > 25) {
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DET(("25 ticks we lose, failure.\n"));
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return -1;
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}
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DET(("success\n"));
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return 0;
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}
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static int __devinit myri_load_lanai(struct myri_eth *mp)
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{
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struct net_device *dev = mp->dev;
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struct myri_shmem __iomem *shmem = mp->shmem;
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void __iomem *rptr;
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int i;
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myri_disable_irq(mp->lregs, mp->cregs);
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myri_reset_on(mp->cregs);
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rptr = mp->lanai;
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for (i = 0; i < mp->eeprom.ramsz; i++)
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sbus_writeb(0, rptr + i);
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if (mp->eeprom.cpuvers >= CPUVERS_3_0)
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sbus_writel(mp->eeprom.cval, mp->lregs + LANAI_CVAL);
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/* Load executable code. */
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for (i = 0; i < sizeof(lanai4_code); i++)
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sbus_writeb(lanai4_code[i], rptr + (lanai4_code_off * 2) + i);
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/* Load data segment. */
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for (i = 0; i < sizeof(lanai4_data); i++)
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sbus_writeb(lanai4_data[i], rptr + (lanai4_data_off * 2) + i);
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/* Set device address. */
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sbus_writeb(0, &shmem->addr[0]);
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sbus_writeb(0, &shmem->addr[1]);
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for (i = 0; i < 6; i++)
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sbus_writeb(dev->dev_addr[i],
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&shmem->addr[i + 2]);
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/* Set SBUS bursts and interrupt mask. */
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sbus_writel(((mp->myri_bursts & 0xf8) >> 3), &shmem->burst);
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sbus_writel(SHMEM_IMASK_RX, &shmem->imask);
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/* Release the LANAI. */
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myri_disable_irq(mp->lregs, mp->cregs);
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myri_reset_off(mp->lregs, mp->cregs);
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myri_disable_irq(mp->lregs, mp->cregs);
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/* Wait for the reset to complete. */
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for (i = 0; i < 5000; i++) {
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if (sbus_readl(&shmem->channel.state) != STATE_READY)
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break;
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else
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udelay(10);
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}
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if (i == 5000)
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printk(KERN_ERR "myricom: Chip would not reset after firmware load.\n");
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i = myri_do_handshake(mp);
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if (i)
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printk(KERN_ERR "myricom: Handshake with LANAI failed.\n");
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if (mp->eeprom.cpuvers == CPUVERS_4_0)
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sbus_writel(0, mp->lregs + LANAI_VERS);
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return i;
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}
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static void myri_clean_rings(struct myri_eth *mp)
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{
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struct sendq __iomem *sq = mp->sq;
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struct recvq __iomem *rq = mp->rq;
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int i;
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sbus_writel(0, &rq->tail);
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sbus_writel(0, &rq->head);
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for (i = 0; i < (RX_RING_SIZE+1); i++) {
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if (mp->rx_skbs[i] != NULL) {
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struct myri_rxd __iomem *rxd = &rq->myri_rxd[i];
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u32 dma_addr;
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dma_addr = sbus_readl(&rxd->myri_scatters[0].addr);
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sbus_unmap_single(mp->myri_sdev, dma_addr, RX_ALLOC_SIZE, SBUS_DMA_FROMDEVICE);
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dev_kfree_skb(mp->rx_skbs[i]);
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mp->rx_skbs[i] = NULL;
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}
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}
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mp->tx_old = 0;
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sbus_writel(0, &sq->tail);
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sbus_writel(0, &sq->head);
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for (i = 0; i < TX_RING_SIZE; i++) {
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if (mp->tx_skbs[i] != NULL) {
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struct sk_buff *skb = mp->tx_skbs[i];
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struct myri_txd __iomem *txd = &sq->myri_txd[i];
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u32 dma_addr;
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dma_addr = sbus_readl(&txd->myri_gathers[0].addr);
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sbus_unmap_single(mp->myri_sdev, dma_addr, (skb->len + 3) & ~3, SBUS_DMA_TODEVICE);
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dev_kfree_skb(mp->tx_skbs[i]);
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mp->tx_skbs[i] = NULL;
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}
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}
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}
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static void myri_init_rings(struct myri_eth *mp, int from_irq)
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{
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struct recvq __iomem *rq = mp->rq;
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struct myri_rxd __iomem *rxd = &rq->myri_rxd[0];
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struct net_device *dev = mp->dev;
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gfp_t gfp_flags = GFP_KERNEL;
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int i;
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if (from_irq || in_interrupt())
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gfp_flags = GFP_ATOMIC;
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myri_clean_rings(mp);
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for (i = 0; i < RX_RING_SIZE; i++) {
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struct sk_buff *skb = myri_alloc_skb(RX_ALLOC_SIZE, gfp_flags);
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u32 dma_addr;
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if (!skb)
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continue;
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mp->rx_skbs[i] = skb;
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skb->dev = dev;
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skb_put(skb, RX_ALLOC_SIZE);
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dma_addr = sbus_map_single(mp->myri_sdev, skb->data, RX_ALLOC_SIZE, SBUS_DMA_FROMDEVICE);
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sbus_writel(dma_addr, &rxd[i].myri_scatters[0].addr);
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sbus_writel(RX_ALLOC_SIZE, &rxd[i].myri_scatters[0].len);
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sbus_writel(i, &rxd[i].ctx);
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sbus_writel(1, &rxd[i].num_sg);
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}
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sbus_writel(0, &rq->head);
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sbus_writel(RX_RING_SIZE, &rq->tail);
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}
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static int myri_init(struct myri_eth *mp, int from_irq)
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{
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myri_init_rings(mp, from_irq);
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return 0;
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}
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static void myri_is_not_so_happy(struct myri_eth *mp)
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{
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}
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#ifdef DEBUG_HEADER
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static void dump_ehdr(struct ethhdr *ehdr)
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{
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printk("ehdr[h_dst(%02x:%02x:%02x:%02x:%02x:%02x)"
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"h_source(%02x:%02x:%02x:%02x:%02x:%02x)h_proto(%04x)]\n",
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ehdr->h_dest[0], ehdr->h_dest[1], ehdr->h_dest[2],
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ehdr->h_dest[3], ehdr->h_dest[4], ehdr->h_dest[4],
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ehdr->h_source[0], ehdr->h_source[1], ehdr->h_source[2],
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ehdr->h_source[3], ehdr->h_source[4], ehdr->h_source[4],
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ehdr->h_proto);
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}
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static void dump_ehdr_and_myripad(unsigned char *stuff)
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{
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struct ethhdr *ehdr = (struct ethhdr *) (stuff + 2);
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printk("pad[%02x:%02x]", stuff[0], stuff[1]);
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printk("ehdr[h_dst(%02x:%02x:%02x:%02x:%02x:%02x)"
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"h_source(%02x:%02x:%02x:%02x:%02x:%02x)h_proto(%04x)]\n",
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ehdr->h_dest[0], ehdr->h_dest[1], ehdr->h_dest[2],
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ehdr->h_dest[3], ehdr->h_dest[4], ehdr->h_dest[4],
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ehdr->h_source[0], ehdr->h_source[1], ehdr->h_source[2],
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ehdr->h_source[3], ehdr->h_source[4], ehdr->h_source[4],
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ehdr->h_proto);
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}
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#endif
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static void myri_tx(struct myri_eth *mp, struct net_device *dev)
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{
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struct sendq __iomem *sq= mp->sq;
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int entry = mp->tx_old;
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int limit = sbus_readl(&sq->head);
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DTX(("entry[%d] limit[%d] ", entry, limit));
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if (entry == limit)
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return;
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while (entry != limit) {
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struct sk_buff *skb = mp->tx_skbs[entry];
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u32 dma_addr;
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DTX(("SKB[%d] ", entry));
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dma_addr = sbus_readl(&sq->myri_txd[entry].myri_gathers[0].addr);
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sbus_unmap_single(mp->myri_sdev, dma_addr, skb->len, SBUS_DMA_TODEVICE);
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dev_kfree_skb(skb);
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mp->tx_skbs[entry] = NULL;
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mp->enet_stats.tx_packets++;
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entry = NEXT_TX(entry);
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}
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mp->tx_old = entry;
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}
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/* Determine the packet's protocol ID. The rule here is that we
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* assume 802.3 if the type field is short enough to be a length.
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* This is normal practice and works for any 'now in use' protocol.
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*/
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static __be16 myri_type_trans(struct sk_buff *skb, struct net_device *dev)
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{
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struct ethhdr *eth;
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unsigned char *rawp;
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skb_set_mac_header(skb, MYRI_PAD_LEN);
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skb_pull(skb, dev->hard_header_len);
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eth = eth_hdr(skb);
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#ifdef DEBUG_HEADER
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DHDR(("myri_type_trans: "));
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dump_ehdr(eth);
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#endif
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if (*eth->h_dest & 1) {
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if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN)==0)
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skb->pkt_type = PACKET_BROADCAST;
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else
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skb->pkt_type = PACKET_MULTICAST;
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} else if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI)) {
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if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
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skb->pkt_type = PACKET_OTHERHOST;
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}
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if (ntohs(eth->h_proto) >= 1536)
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return eth->h_proto;
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rawp = skb->data;
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/* This is a magic hack to spot IPX packets. Older Novell breaks
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* the protocol design and runs IPX over 802.3 without an 802.2 LLC
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* layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
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* won't work for fault tolerant netware but does for the rest.
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*/
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if (*(unsigned short *)rawp == 0xFFFF)
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return htons(ETH_P_802_3);
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/* Real 802.2 LLC */
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return htons(ETH_P_802_2);
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}
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static void myri_rx(struct myri_eth *mp, struct net_device *dev)
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{
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struct recvq __iomem *rq = mp->rq;
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struct recvq __iomem *rqa = mp->rqack;
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int entry = sbus_readl(&rqa->head);
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int limit = sbus_readl(&rqa->tail);
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int drops;
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DRX(("entry[%d] limit[%d] ", entry, limit));
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if (entry == limit)
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return;
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drops = 0;
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DRX(("\n"));
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while (entry != limit) {
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struct myri_rxd __iomem *rxdack = &rqa->myri_rxd[entry];
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u32 csum = sbus_readl(&rxdack->csum);
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int len = sbus_readl(&rxdack->myri_scatters[0].len);
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int index = sbus_readl(&rxdack->ctx);
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struct myri_rxd __iomem *rxd = &rq->myri_rxd[sbus_readl(&rq->tail)];
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struct sk_buff *skb = mp->rx_skbs[index];
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/* Ack it. */
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sbus_writel(NEXT_RX(entry), &rqa->head);
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/* Check for errors. */
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DRX(("rxd[%d]: %p len[%d] csum[%08x] ", entry, rxd, len, csum));
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sbus_dma_sync_single_for_cpu(mp->myri_sdev,
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sbus_readl(&rxd->myri_scatters[0].addr),
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RX_ALLOC_SIZE, SBUS_DMA_FROMDEVICE);
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if (len < (ETH_HLEN + MYRI_PAD_LEN) || (skb->data[0] != MYRI_PAD_LEN)) {
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DRX(("ERROR["));
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mp->enet_stats.rx_errors++;
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if (len < (ETH_HLEN + MYRI_PAD_LEN)) {
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DRX(("BAD_LENGTH] "));
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mp->enet_stats.rx_length_errors++;
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} else {
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DRX(("NO_PADDING] "));
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mp->enet_stats.rx_frame_errors++;
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}
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/* Return it to the LANAI. */
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drop_it:
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drops++;
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DRX(("DROP "));
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mp->enet_stats.rx_dropped++;
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sbus_dma_sync_single_for_device(mp->myri_sdev,
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sbus_readl(&rxd->myri_scatters[0].addr),
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RX_ALLOC_SIZE,
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SBUS_DMA_FROMDEVICE);
|
|
sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len);
|
|
sbus_writel(index, &rxd->ctx);
|
|
sbus_writel(1, &rxd->num_sg);
|
|
sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail);
|
|
goto next;
|
|
}
|
|
|
|
DRX(("len[%d] ", len));
|
|
if (len > RX_COPY_THRESHOLD) {
|
|
struct sk_buff *new_skb;
|
|
u32 dma_addr;
|
|
|
|
DRX(("BIGBUFF "));
|
|
new_skb = myri_alloc_skb(RX_ALLOC_SIZE, GFP_ATOMIC);
|
|
if (new_skb == NULL) {
|
|
DRX(("skb_alloc(FAILED) "));
|
|
goto drop_it;
|
|
}
|
|
sbus_unmap_single(mp->myri_sdev,
|
|
sbus_readl(&rxd->myri_scatters[0].addr),
|
|
RX_ALLOC_SIZE,
|
|
SBUS_DMA_FROMDEVICE);
|
|
mp->rx_skbs[index] = new_skb;
|
|
new_skb->dev = dev;
|
|
skb_put(new_skb, RX_ALLOC_SIZE);
|
|
dma_addr = sbus_map_single(mp->myri_sdev,
|
|
new_skb->data,
|
|
RX_ALLOC_SIZE,
|
|
SBUS_DMA_FROMDEVICE);
|
|
sbus_writel(dma_addr, &rxd->myri_scatters[0].addr);
|
|
sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len);
|
|
sbus_writel(index, &rxd->ctx);
|
|
sbus_writel(1, &rxd->num_sg);
|
|
sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail);
|
|
|
|
/* Trim the original skb for the netif. */
|
|
DRX(("trim(%d) ", len));
|
|
skb_trim(skb, len);
|
|
} else {
|
|
struct sk_buff *copy_skb = dev_alloc_skb(len);
|
|
|
|
DRX(("SMALLBUFF "));
|
|
if (copy_skb == NULL) {
|
|
DRX(("dev_alloc_skb(FAILED) "));
|
|
goto drop_it;
|
|
}
|
|
/* DMA sync already done above. */
|
|
copy_skb->dev = dev;
|
|
DRX(("resv_and_put "));
|
|
skb_put(copy_skb, len);
|
|
skb_copy_from_linear_data(skb, copy_skb->data, len);
|
|
|
|
/* Reuse original ring buffer. */
|
|
DRX(("reuse "));
|
|
sbus_dma_sync_single_for_device(mp->myri_sdev,
|
|
sbus_readl(&rxd->myri_scatters[0].addr),
|
|
RX_ALLOC_SIZE,
|
|
SBUS_DMA_FROMDEVICE);
|
|
sbus_writel(RX_ALLOC_SIZE, &rxd->myri_scatters[0].len);
|
|
sbus_writel(index, &rxd->ctx);
|
|
sbus_writel(1, &rxd->num_sg);
|
|
sbus_writel(NEXT_RX(sbus_readl(&rq->tail)), &rq->tail);
|
|
|
|
skb = copy_skb;
|
|
}
|
|
|
|
/* Just like the happy meal we get checksums from this card. */
|
|
skb->csum = csum;
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY; /* XXX */
|
|
|
|
skb->protocol = myri_type_trans(skb, dev);
|
|
DRX(("prot[%04x] netif_rx ", skb->protocol));
|
|
netif_rx(skb);
|
|
|
|
dev->last_rx = jiffies;
|
|
mp->enet_stats.rx_packets++;
|
|
mp->enet_stats.rx_bytes += len;
|
|
next:
|
|
DRX(("NEXT\n"));
|
|
entry = NEXT_RX(entry);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t myri_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = (struct net_device *) dev_id;
|
|
struct myri_eth *mp = (struct myri_eth *) dev->priv;
|
|
void __iomem *lregs = mp->lregs;
|
|
struct myri_channel __iomem *chan = &mp->shmem->channel;
|
|
unsigned long flags;
|
|
u32 status;
|
|
int handled = 0;
|
|
|
|
spin_lock_irqsave(&mp->irq_lock, flags);
|
|
|
|
status = sbus_readl(lregs + LANAI_ISTAT);
|
|
DIRQ(("myri_interrupt: status[%08x] ", status));
|
|
if (status & ISTAT_HOST) {
|
|
u32 softstate;
|
|
|
|
handled = 1;
|
|
DIRQ(("IRQ_DISAB "));
|
|
myri_disable_irq(lregs, mp->cregs);
|
|
softstate = sbus_readl(&chan->state);
|
|
DIRQ(("state[%08x] ", softstate));
|
|
if (softstate != STATE_READY) {
|
|
DIRQ(("myri_not_so_happy "));
|
|
myri_is_not_so_happy(mp);
|
|
}
|
|
DIRQ(("\nmyri_rx: "));
|
|
myri_rx(mp, dev);
|
|
DIRQ(("\nistat=ISTAT_HOST "));
|
|
sbus_writel(ISTAT_HOST, lregs + LANAI_ISTAT);
|
|
DIRQ(("IRQ_ENAB "));
|
|
myri_enable_irq(lregs, mp->cregs);
|
|
}
|
|
DIRQ(("\n"));
|
|
|
|
spin_unlock_irqrestore(&mp->irq_lock, flags);
|
|
|
|
return IRQ_RETVAL(handled);
|
|
}
|
|
|
|
static int myri_open(struct net_device *dev)
|
|
{
|
|
struct myri_eth *mp = (struct myri_eth *) dev->priv;
|
|
|
|
return myri_init(mp, in_interrupt());
|
|
}
|
|
|
|
static int myri_close(struct net_device *dev)
|
|
{
|
|
struct myri_eth *mp = (struct myri_eth *) dev->priv;
|
|
|
|
myri_clean_rings(mp);
|
|
return 0;
|
|
}
|
|
|
|
static void myri_tx_timeout(struct net_device *dev)
|
|
{
|
|
struct myri_eth *mp = (struct myri_eth *) dev->priv;
|
|
|
|
printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
|
|
|
|
mp->enet_stats.tx_errors++;
|
|
myri_init(mp, 0);
|
|
netif_wake_queue(dev);
|
|
}
|
|
|
|
static int myri_start_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct myri_eth *mp = (struct myri_eth *) dev->priv;
|
|
struct sendq __iomem *sq = mp->sq;
|
|
struct myri_txd __iomem *txd;
|
|
unsigned long flags;
|
|
unsigned int head, tail;
|
|
int len, entry;
|
|
u32 dma_addr;
|
|
|
|
DTX(("myri_start_xmit: "));
|
|
|
|
myri_tx(mp, dev);
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
/* This is just to prevent multiple PIO reads for TX_BUFFS_AVAIL. */
|
|
head = sbus_readl(&sq->head);
|
|
tail = sbus_readl(&sq->tail);
|
|
|
|
if (!TX_BUFFS_AVAIL(head, tail)) {
|
|
DTX(("no buffs available, returning 1\n"));
|
|
return 1;
|
|
}
|
|
|
|
spin_lock_irqsave(&mp->irq_lock, flags);
|
|
|
|
DHDR(("xmit[skbdata(%p)]\n", skb->data));
|
|
#ifdef DEBUG_HEADER
|
|
dump_ehdr_and_myripad(((unsigned char *) skb->data));
|
|
#endif
|
|
|
|
/* XXX Maybe this can go as well. */
|
|
len = skb->len;
|
|
if (len & 3) {
|
|
DTX(("len&3 "));
|
|
len = (len + 4) & (~3);
|
|
}
|
|
|
|
entry = sbus_readl(&sq->tail);
|
|
|
|
txd = &sq->myri_txd[entry];
|
|
mp->tx_skbs[entry] = skb;
|
|
|
|
/* Must do this before we sbus map it. */
|
|
if (skb->data[MYRI_PAD_LEN] & 0x1) {
|
|
sbus_writew(0xffff, &txd->addr[0]);
|
|
sbus_writew(0xffff, &txd->addr[1]);
|
|
sbus_writew(0xffff, &txd->addr[2]);
|
|
sbus_writew(0xffff, &txd->addr[3]);
|
|
} else {
|
|
sbus_writew(0xffff, &txd->addr[0]);
|
|
sbus_writew((skb->data[0] << 8) | skb->data[1], &txd->addr[1]);
|
|
sbus_writew((skb->data[2] << 8) | skb->data[3], &txd->addr[2]);
|
|
sbus_writew((skb->data[4] << 8) | skb->data[5], &txd->addr[3]);
|
|
}
|
|
|
|
dma_addr = sbus_map_single(mp->myri_sdev, skb->data, len, SBUS_DMA_TODEVICE);
|
|
sbus_writel(dma_addr, &txd->myri_gathers[0].addr);
|
|
sbus_writel(len, &txd->myri_gathers[0].len);
|
|
sbus_writel(1, &txd->num_sg);
|
|
sbus_writel(KERNEL_CHANNEL, &txd->chan);
|
|
sbus_writel(len, &txd->len);
|
|
sbus_writel((u32)-1, &txd->csum_off);
|
|
sbus_writel(0, &txd->csum_field);
|
|
|
|
sbus_writel(NEXT_TX(entry), &sq->tail);
|
|
DTX(("BangTheChip "));
|
|
bang_the_chip(mp);
|
|
|
|
DTX(("tbusy=0, returning 0\n"));
|
|
netif_start_queue(dev);
|
|
spin_unlock_irqrestore(&mp->irq_lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
/* Create the MyriNet MAC header for an arbitrary protocol layer
|
|
*
|
|
* saddr=NULL means use device source address
|
|
* daddr=NULL means leave destination address (eg unresolved arp)
|
|
*/
|
|
static int myri_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
|
|
void *daddr, void *saddr, unsigned len)
|
|
{
|
|
struct ethhdr *eth = (struct ethhdr *) skb_push(skb, ETH_HLEN);
|
|
unsigned char *pad = (unsigned char *) skb_push(skb, MYRI_PAD_LEN);
|
|
|
|
#ifdef DEBUG_HEADER
|
|
DHDR(("myri_header: pad[%02x,%02x] ", pad[0], pad[1]));
|
|
dump_ehdr(eth);
|
|
#endif
|
|
|
|
/* Set the MyriNET padding identifier. */
|
|
pad[0] = MYRI_PAD_LEN;
|
|
pad[1] = 0xab;
|
|
|
|
/* Set the protocol type. For a packet of type ETH_P_802_3 we put the length
|
|
* in here instead. It is up to the 802.2 layer to carry protocol information.
|
|
*/
|
|
if (type != ETH_P_802_3)
|
|
eth->h_proto = htons(type);
|
|
else
|
|
eth->h_proto = htons(len);
|
|
|
|
/* Set the source hardware address. */
|
|
if (saddr)
|
|
memcpy(eth->h_source, saddr, dev->addr_len);
|
|
else
|
|
memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
|
|
|
|
/* Anyway, the loopback-device should never use this function... */
|
|
if (dev->flags & IFF_LOOPBACK) {
|
|
int i;
|
|
for (i = 0; i < dev->addr_len; i++)
|
|
eth->h_dest[i] = 0;
|
|
return(dev->hard_header_len);
|
|
}
|
|
|
|
if (daddr) {
|
|
memcpy(eth->h_dest, daddr, dev->addr_len);
|
|
return dev->hard_header_len;
|
|
}
|
|
return -dev->hard_header_len;
|
|
}
|
|
|
|
/* Rebuild the MyriNet MAC header. This is called after an ARP
|
|
* (or in future other address resolution) has completed on this
|
|
* sk_buff. We now let ARP fill in the other fields.
|
|
*/
|
|
static int myri_rebuild_header(struct sk_buff *skb)
|
|
{
|
|
unsigned char *pad = (unsigned char *) skb->data;
|
|
struct ethhdr *eth = (struct ethhdr *) (pad + MYRI_PAD_LEN);
|
|
struct net_device *dev = skb->dev;
|
|
|
|
#ifdef DEBUG_HEADER
|
|
DHDR(("myri_rebuild_header: pad[%02x,%02x] ", pad[0], pad[1]));
|
|
dump_ehdr(eth);
|
|
#endif
|
|
|
|
/* Refill MyriNet padding identifiers, this is just being anal. */
|
|
pad[0] = MYRI_PAD_LEN;
|
|
pad[1] = 0xab;
|
|
|
|
switch (eth->h_proto)
|
|
{
|
|
#ifdef CONFIG_INET
|
|
case __constant_htons(ETH_P_IP):
|
|
return arp_find(eth->h_dest, skb);
|
|
#endif
|
|
|
|
default:
|
|
printk(KERN_DEBUG
|
|
"%s: unable to resolve type %X addresses.\n",
|
|
dev->name, (int)eth->h_proto);
|
|
|
|
memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
|
|
return 0;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int myri_header_cache(struct neighbour *neigh, struct hh_cache *hh)
|
|
{
|
|
unsigned short type = hh->hh_type;
|
|
unsigned char *pad;
|
|
struct ethhdr *eth;
|
|
struct net_device *dev = neigh->dev;
|
|
|
|
pad = ((unsigned char *) hh->hh_data) +
|
|
HH_DATA_OFF(sizeof(*eth) + MYRI_PAD_LEN);
|
|
eth = (struct ethhdr *) (pad + MYRI_PAD_LEN);
|
|
|
|
if (type == __constant_htons(ETH_P_802_3))
|
|
return -1;
|
|
|
|
/* Refill MyriNet padding identifiers, this is just being anal. */
|
|
pad[0] = MYRI_PAD_LEN;
|
|
pad[1] = 0xab;
|
|
|
|
eth->h_proto = type;
|
|
memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
|
|
memcpy(eth->h_dest, neigh->ha, dev->addr_len);
|
|
hh->hh_len = 16;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Called by Address Resolution module to notify changes in address. */
|
|
void myri_header_cache_update(struct hh_cache *hh, struct net_device *dev, unsigned char * haddr)
|
|
{
|
|
memcpy(((u8*)hh->hh_data) + HH_DATA_OFF(sizeof(struct ethhdr)),
|
|
haddr, dev->addr_len);
|
|
}
|
|
|
|
static int myri_change_mtu(struct net_device *dev, int new_mtu)
|
|
{
|
|
if ((new_mtu < (ETH_HLEN + MYRI_PAD_LEN)) || (new_mtu > MYRINET_MTU))
|
|
return -EINVAL;
|
|
dev->mtu = new_mtu;
|
|
return 0;
|
|
}
|
|
|
|
static struct net_device_stats *myri_get_stats(struct net_device *dev)
|
|
{ return &(((struct myri_eth *)dev->priv)->enet_stats); }
|
|
|
|
static void myri_set_multicast(struct net_device *dev)
|
|
{
|
|
/* Do nothing, all MyriCOM nodes transmit multicast frames
|
|
* as broadcast packets...
|
|
*/
|
|
}
|
|
|
|
static inline void set_boardid_from_idprom(struct myri_eth *mp, int num)
|
|
{
|
|
mp->eeprom.id[0] = 0;
|
|
mp->eeprom.id[1] = idprom->id_machtype;
|
|
mp->eeprom.id[2] = (idprom->id_sernum >> 16) & 0xff;
|
|
mp->eeprom.id[3] = (idprom->id_sernum >> 8) & 0xff;
|
|
mp->eeprom.id[4] = (idprom->id_sernum >> 0) & 0xff;
|
|
mp->eeprom.id[5] = num;
|
|
}
|
|
|
|
static inline void determine_reg_space_size(struct myri_eth *mp)
|
|
{
|
|
switch(mp->eeprom.cpuvers) {
|
|
case CPUVERS_2_3:
|
|
case CPUVERS_3_0:
|
|
case CPUVERS_3_1:
|
|
case CPUVERS_3_2:
|
|
mp->reg_size = (3 * 128 * 1024) + 4096;
|
|
break;
|
|
|
|
case CPUVERS_4_0:
|
|
case CPUVERS_4_1:
|
|
mp->reg_size = ((4096<<1) + mp->eeprom.ramsz);
|
|
break;
|
|
|
|
case CPUVERS_4_2:
|
|
case CPUVERS_5_0:
|
|
default:
|
|
printk("myricom: AIEEE weird cpu version %04x assuming pre4.0\n",
|
|
mp->eeprom.cpuvers);
|
|
mp->reg_size = (3 * 128 * 1024) + 4096;
|
|
};
|
|
}
|
|
|
|
#ifdef DEBUG_DETECT
|
|
static void dump_eeprom(struct myri_eth *mp)
|
|
{
|
|
printk("EEPROM: clockval[%08x] cpuvers[%04x] "
|
|
"id[%02x,%02x,%02x,%02x,%02x,%02x]\n",
|
|
mp->eeprom.cval, mp->eeprom.cpuvers,
|
|
mp->eeprom.id[0], mp->eeprom.id[1], mp->eeprom.id[2],
|
|
mp->eeprom.id[3], mp->eeprom.id[4], mp->eeprom.id[5]);
|
|
printk("EEPROM: ramsz[%08x]\n", mp->eeprom.ramsz);
|
|
printk("EEPROM: fvers[%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
|
|
mp->eeprom.fvers[0], mp->eeprom.fvers[1], mp->eeprom.fvers[2],
|
|
mp->eeprom.fvers[3], mp->eeprom.fvers[4], mp->eeprom.fvers[5],
|
|
mp->eeprom.fvers[6], mp->eeprom.fvers[7]);
|
|
printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
|
|
mp->eeprom.fvers[8], mp->eeprom.fvers[9], mp->eeprom.fvers[10],
|
|
mp->eeprom.fvers[11], mp->eeprom.fvers[12], mp->eeprom.fvers[13],
|
|
mp->eeprom.fvers[14], mp->eeprom.fvers[15]);
|
|
printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
|
|
mp->eeprom.fvers[16], mp->eeprom.fvers[17], mp->eeprom.fvers[18],
|
|
mp->eeprom.fvers[19], mp->eeprom.fvers[20], mp->eeprom.fvers[21],
|
|
mp->eeprom.fvers[22], mp->eeprom.fvers[23]);
|
|
printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x]\n",
|
|
mp->eeprom.fvers[24], mp->eeprom.fvers[25], mp->eeprom.fvers[26],
|
|
mp->eeprom.fvers[27], mp->eeprom.fvers[28], mp->eeprom.fvers[29],
|
|
mp->eeprom.fvers[30], mp->eeprom.fvers[31]);
|
|
printk("EEPROM: mvers[%02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x\n",
|
|
mp->eeprom.mvers[0], mp->eeprom.mvers[1], mp->eeprom.mvers[2],
|
|
mp->eeprom.mvers[3], mp->eeprom.mvers[4], mp->eeprom.mvers[5],
|
|
mp->eeprom.mvers[6], mp->eeprom.mvers[7]);
|
|
printk("EEPROM: %02x,%02x,%02x,%02x,%02x,%02x,%02x,%02x]\n",
|
|
mp->eeprom.mvers[8], mp->eeprom.mvers[9], mp->eeprom.mvers[10],
|
|
mp->eeprom.mvers[11], mp->eeprom.mvers[12], mp->eeprom.mvers[13],
|
|
mp->eeprom.mvers[14], mp->eeprom.mvers[15]);
|
|
printk("EEPROM: dlval[%04x] brd_type[%04x] bus_type[%04x] prod_code[%04x]\n",
|
|
mp->eeprom.dlval, mp->eeprom.brd_type, mp->eeprom.bus_type,
|
|
mp->eeprom.prod_code);
|
|
printk("EEPROM: serial_num[%08x]\n", mp->eeprom.serial_num);
|
|
}
|
|
#endif
|
|
|
|
static int __devinit myri_ether_init(struct sbus_dev *sdev)
|
|
{
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static int num;
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static unsigned version_printed;
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struct net_device *dev;
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struct myri_eth *mp;
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unsigned char prop_buf[32];
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int i;
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DET(("myri_ether_init(%p,%d):\n", sdev, num));
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dev = alloc_etherdev(sizeof(struct myri_eth));
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if (!dev)
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return -ENOMEM;
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if (version_printed++ == 0)
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printk(version);
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SET_MODULE_OWNER(dev);
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SET_NETDEV_DEV(dev, &sdev->ofdev.dev);
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mp = (struct myri_eth *) dev->priv;
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spin_lock_init(&mp->irq_lock);
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mp->myri_sdev = sdev;
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/* Clean out skb arrays. */
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for (i = 0; i < (RX_RING_SIZE + 1); i++)
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mp->rx_skbs[i] = NULL;
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for (i = 0; i < TX_RING_SIZE; i++)
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mp->tx_skbs[i] = NULL;
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/* First check for EEPROM information. */
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i = prom_getproperty(sdev->prom_node, "myrinet-eeprom-info",
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(char *)&mp->eeprom, sizeof(struct myri_eeprom));
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DET(("prom_getprop(myrinet-eeprom-info) returns %d\n", i));
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if (i == 0 || i == -1) {
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/* No eeprom property, must cook up the values ourselves. */
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DET(("No EEPROM: "));
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mp->eeprom.bus_type = BUS_TYPE_SBUS;
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mp->eeprom.cpuvers = prom_getintdefault(sdev->prom_node,"cpu_version",0);
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mp->eeprom.cval = prom_getintdefault(sdev->prom_node,"clock_value",0);
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mp->eeprom.ramsz = prom_getintdefault(sdev->prom_node,"sram_size",0);
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DET(("cpuvers[%d] cval[%d] ramsz[%d]\n", mp->eeprom.cpuvers,
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mp->eeprom.cval, mp->eeprom.ramsz));
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if (mp->eeprom.cpuvers == 0) {
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DET(("EEPROM: cpuvers was zero, setting to %04x\n",CPUVERS_2_3));
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mp->eeprom.cpuvers = CPUVERS_2_3;
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}
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if (mp->eeprom.cpuvers < CPUVERS_3_0) {
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DET(("EEPROM: cpuvers < CPUVERS_3_0, clockval set to zero.\n"));
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mp->eeprom.cval = 0;
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}
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if (mp->eeprom.ramsz == 0) {
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DET(("EEPROM: ramsz == 0, setting to 128k\n"));
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mp->eeprom.ramsz = (128 * 1024);
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}
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i = prom_getproperty(sdev->prom_node, "myrinet-board-id",
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&prop_buf[0], 10);
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DET(("EEPROM: prom_getprop(myrinet-board-id) returns %d\n", i));
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if ((i != 0) && (i != -1))
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memcpy(&mp->eeprom.id[0], &prop_buf[0], 6);
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else
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set_boardid_from_idprom(mp, num);
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i = prom_getproperty(sdev->prom_node, "fpga_version",
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&mp->eeprom.fvers[0], 32);
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DET(("EEPROM: prom_getprop(fpga_version) returns %d\n", i));
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if (i == 0 || i == -1)
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memset(&mp->eeprom.fvers[0], 0, 32);
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if (mp->eeprom.cpuvers == CPUVERS_4_1) {
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DET(("EEPROM: cpuvers CPUVERS_4_1, "));
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if (mp->eeprom.ramsz == (128 * 1024)) {
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DET(("ramsize 128k, setting to 256k, "));
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mp->eeprom.ramsz = (256 * 1024);
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}
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if ((mp->eeprom.cval==0x40414041)||(mp->eeprom.cval==0x90449044)){
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DET(("changing cval from %08x to %08x ",
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mp->eeprom.cval, 0x50e450e4));
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mp->eeprom.cval = 0x50e450e4;
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}
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DET(("\n"));
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}
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}
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#ifdef DEBUG_DETECT
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dump_eeprom(mp);
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#endif
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for (i = 0; i < 6; i++)
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dev->dev_addr[i] = mp->eeprom.id[i];
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determine_reg_space_size(mp);
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/* Map in the MyriCOM register/localram set. */
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if (mp->eeprom.cpuvers < CPUVERS_4_0) {
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/* XXX Makes no sense, if control reg is non-existant this
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* XXX driver cannot function at all... maybe pre-4.0 is
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* XXX only a valid version for PCI cards? Ask feldy...
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*/
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DET(("Mapping regs for cpuvers < CPUVERS_4_0\n"));
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mp->regs = sbus_ioremap(&sdev->resource[0], 0,
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mp->reg_size, "MyriCOM Regs");
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if (!mp->regs) {
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printk("MyriCOM: Cannot map MyriCOM registers.\n");
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goto err;
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}
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mp->lanai = mp->regs + (256 * 1024);
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mp->lregs = mp->lanai + (0x10000 * 2);
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} else {
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DET(("Mapping regs for cpuvers >= CPUVERS_4_0\n"));
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mp->cregs = sbus_ioremap(&sdev->resource[0], 0,
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PAGE_SIZE, "MyriCOM Control Regs");
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mp->lregs = sbus_ioremap(&sdev->resource[0], (256 * 1024),
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PAGE_SIZE, "MyriCOM LANAI Regs");
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mp->lanai =
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sbus_ioremap(&sdev->resource[0], (512 * 1024),
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mp->eeprom.ramsz, "MyriCOM SRAM");
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}
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DET(("Registers mapped: cregs[%p] lregs[%p] lanai[%p]\n",
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mp->cregs, mp->lregs, mp->lanai));
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if (mp->eeprom.cpuvers >= CPUVERS_4_0)
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mp->shmem_base = 0xf000;
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else
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mp->shmem_base = 0x8000;
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DET(("Shared memory base is %04x, ", mp->shmem_base));
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mp->shmem = (struct myri_shmem __iomem *)
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(mp->lanai + (mp->shmem_base * 2));
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DET(("shmem mapped at %p\n", mp->shmem));
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mp->rqack = &mp->shmem->channel.recvqa;
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mp->rq = &mp->shmem->channel.recvq;
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mp->sq = &mp->shmem->channel.sendq;
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/* Reset the board. */
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DET(("Resetting LANAI\n"));
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myri_reset_off(mp->lregs, mp->cregs);
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myri_reset_on(mp->cregs);
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/* Turn IRQ's off. */
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myri_disable_irq(mp->lregs, mp->cregs);
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/* Reset once more. */
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myri_reset_on(mp->cregs);
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/* Get the supported DVMA burst sizes from our SBUS. */
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mp->myri_bursts = prom_getintdefault(mp->myri_sdev->bus->prom_node,
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"burst-sizes", 0x00);
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if (!sbus_can_burst64(sdev))
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mp->myri_bursts &= ~(DMA_BURST64);
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DET(("MYRI bursts %02x\n", mp->myri_bursts));
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/* Encode SBUS interrupt level in second control register. */
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i = prom_getint(sdev->prom_node, "interrupts");
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if (i == 0)
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i = 4;
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DET(("prom_getint(interrupts)==%d, irqlvl set to %04x\n",
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i, (1 << i)));
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sbus_writel((1 << i), mp->cregs + MYRICTRL_IRQLVL);
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mp->dev = dev;
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dev->open = &myri_open;
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dev->stop = &myri_close;
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dev->hard_start_xmit = &myri_start_xmit;
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dev->tx_timeout = &myri_tx_timeout;
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dev->watchdog_timeo = 5*HZ;
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dev->get_stats = &myri_get_stats;
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dev->set_multicast_list = &myri_set_multicast;
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dev->irq = sdev->irqs[0];
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/* Register interrupt handler now. */
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DET(("Requesting MYRIcom IRQ line.\n"));
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if (request_irq(dev->irq, &myri_interrupt,
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IRQF_SHARED, "MyriCOM Ethernet", (void *) dev)) {
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printk("MyriCOM: Cannot register interrupt handler.\n");
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goto err;
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}
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dev->mtu = MYRINET_MTU;
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dev->change_mtu = myri_change_mtu;
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dev->hard_header = myri_header;
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dev->rebuild_header = myri_rebuild_header;
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dev->hard_header_len = (ETH_HLEN + MYRI_PAD_LEN);
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dev->hard_header_cache = myri_header_cache;
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dev->header_cache_update= myri_header_cache_update;
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/* Load code onto the LANai. */
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DET(("Loading LANAI firmware\n"));
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myri_load_lanai(mp);
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if (register_netdev(dev)) {
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printk("MyriCOM: Cannot register device.\n");
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goto err_free_irq;
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}
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dev_set_drvdata(&sdev->ofdev.dev, mp);
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num++;
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printk("%s: MyriCOM MyriNET Ethernet ", dev->name);
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for (i = 0; i < 6; i++)
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printk("%2.2x%c", dev->dev_addr[i],
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i == 5 ? ' ' : ':');
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printk("\n");
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return 0;
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err_free_irq:
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free_irq(dev->irq, dev);
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err:
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/* This will also free the co-allocated 'dev->priv' */
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free_netdev(dev);
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return -ENODEV;
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}
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static int __devinit myri_sbus_probe(struct of_device *dev, const struct of_device_id *match)
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{
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struct sbus_dev *sdev = to_sbus_device(&dev->dev);
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return myri_ether_init(sdev);
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}
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static int __devexit myri_sbus_remove(struct of_device *dev)
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{
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struct myri_eth *mp = dev_get_drvdata(&dev->dev);
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struct net_device *net_dev = mp->dev;
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unregister_netdevice(net_dev);
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free_irq(net_dev->irq, net_dev);
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if (mp->eeprom.cpuvers < CPUVERS_4_0) {
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sbus_iounmap(mp->regs, mp->reg_size);
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} else {
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sbus_iounmap(mp->cregs, PAGE_SIZE);
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sbus_iounmap(mp->lregs, (256 * 1024));
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sbus_iounmap(mp->lanai, (512 * 1024));
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}
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free_netdev(net_dev);
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dev_set_drvdata(&dev->dev, NULL);
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return 0;
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}
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static struct of_device_id myri_sbus_match[] = {
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{
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.name = "MYRICOM,mlanai",
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},
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{
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.name = "myri",
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, myri_sbus_match);
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static struct of_platform_driver myri_sbus_driver = {
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.name = "myri",
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.match_table = myri_sbus_match,
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.probe = myri_sbus_probe,
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.remove = __devexit_p(myri_sbus_remove),
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};
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static int __init myri_sbus_init(void)
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{
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return of_register_driver(&myri_sbus_driver, &sbus_bus_type);
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}
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static void __exit myri_sbus_exit(void)
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{
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of_unregister_driver(&myri_sbus_driver);
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}
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module_init(myri_sbus_init);
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module_exit(myri_sbus_exit);
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MODULE_LICENSE("GPL");
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