| /* myri_sbus.c: MyriCOM MyriNET SBUS card driver. |
| * |
| * Copyright (C) 1996, 1999, 2006 David S. Miller (davem@davemloft.net) |
| */ |
| |
| static char version[] = |
| "myri_sbus.c:v2.0 June 23, 2006 David S. Miller (davem@davemloft.net)\n"; |
| |
| #include <linux/module.h> |
| #include <linux/errno.h> |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/fcntl.h> |
| #include <linux/interrupt.h> |
| #include <linux/ioport.h> |
| #include <linux/in.h> |
| #include <linux/slab.h> |
| #include <linux/string.h> |
| #include <linux/delay.h> |
| #include <linux/init.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/skbuff.h> |
| #include <linux/bitops.h> |
| |
| #include <net/dst.h> |
| #include <net/arp.h> |
| #include <net/sock.h> |
| #include <net/ipv6.h> |
| |
| #include <asm/system.h> |
| #include <asm/io.h> |
| #include <asm/dma.h> |
| #include <asm/byteorder.h> |
| #include <asm/idprom.h> |
| #include <asm/sbus.h> |
| #include <asm/openprom.h> |
| #include <asm/oplib.h> |
| #include <asm/auxio.h> |
| #include <asm/pgtable.h> |
| #include <asm/irq.h> |
| #include <asm/checksum.h> |
| |
| #include "myri_sbus.h" |
| #include "myri_code.h" |
| |
| /* #define DEBUG_DETECT */ |
| /* #define DEBUG_IRQ */ |
| /* #define DEBUG_TRANSMIT */ |
| /* #define DEBUG_RECEIVE */ |
| /* #define DEBUG_HEADER */ |
| |
| #ifdef DEBUG_DETECT |
| #define DET(x) printk x |
| #else |
| #define DET(x) |
| #endif |
| |
| #ifdef DEBUG_IRQ |
| #define DIRQ(x) printk x |
| #else |
| #define DIRQ(x) |
| #endif |
| |
| #ifdef DEBUG_TRANSMIT |
| #define DTX(x) printk x |
| #else |
| #define DTX(x) |
| #endif |
| |
| #ifdef DEBUG_RECEIVE |
| #define DRX(x) printk x |
| #else |
| #define DRX(x) |
| #endif |
| |
| #ifdef DEBUG_HEADER |
| #define DHDR(x) printk x |
| #else |
| #define DHDR(x) |
| #endif |
| |
| static void myri_reset_off(void __iomem *lp, void __iomem *cregs) |
| { |
| /* Clear IRQ mask. */ |
| sbus_writel(0, lp + LANAI_EIMASK); |
| |
| /* Turn RESET function off. */ |
| sbus_writel(CONTROL_ROFF, cregs + MYRICTRL_CTRL); |
| } |
| |
| static void myri_reset_on(void __iomem *cregs) |
| { |
| /* Enable RESET function. */ |
| sbus_writel(CONTROL_RON, cregs + MYRICTRL_CTRL); |
| |
| /* Disable IRQ's. */ |
| sbus_writel(CONTROL_DIRQ, cregs + MYRICTRL_CTRL); |
| } |
| |
| static void myri_disable_irq(void __iomem *lp, void __iomem *cregs) |
| { |
| sbus_writel(CONTROL_DIRQ, cregs + MYRICTRL_CTRL); |
| sbus_writel(0, lp + LANAI_EIMASK); |
| sbus_writel(ISTAT_HOST, lp + LANAI_ISTAT); |
| } |
| |
| static void myri_enable_irq(void __iomem *lp, void __iomem *cregs) |
| { |
| sbus_writel(CONTROL_EIRQ, cregs + MYRICTRL_CTRL); |
| sbus_writel(ISTAT_HOST, lp + LANAI_EIMASK); |
| } |
| |
| static inline void bang_the_chip(struct myri_eth *mp) |
| { |
| struct myri_shmem __iomem *shmem = mp->shmem; |
| void __iomem *cregs = mp->cregs; |
| |
| sbus_writel(1, &shmem->send); |
| sbus_writel(CONTROL_WON, cregs + MYRICTRL_CTRL); |
| } |
| |
| static int myri_do_handshake(struct myri_eth *mp) |
| { |
| struct myri_shmem __iomem *shmem = mp->shmem; |
| void __iomem *cregs = mp->cregs; |
| struct myri_channel __iomem *chan = &shmem->channel; |
| int tick = 0; |
| |
| DET(("myri_do_handshake: ")); |
| if (sbus_readl(&chan->state) == STATE_READY) { |
| DET(("Already STATE_READY, failed.\n")); |
| return -1; /* We're hosed... */ |
| } |
| |
| myri_disable_irq(mp->lregs, cregs); |
| |
| while (tick++ <= 25) { |
| u32 softstate; |
| |
| /* Wake it up. */ |
| DET(("shakedown, CONTROL_WON, ")); |
| sbus_writel(1, &shmem->shakedown); |
| sbus_writel(CONTROL_WON, cregs + MYRICTRL_CTRL); |
| |
| softstate = sbus_readl(&chan->state); |
| DET(("chanstate[%08x] ", softstate)); |
| if (softstate == STATE_READY) { |
| DET(("wakeup successful, ")); |
| break; |
| } |
| |
| if (softstate != STATE_WFN) { |
| DET(("not WFN setting that, ")); |
| sbus_writel(STATE_WFN, &chan->state); |
| } |
| |
| udelay(20); |
| } |
| |
| myri_enable_irq(mp->lregs, cregs); |
| |
| if (tick > 25) { |
| DET(("25 ticks we lose, failure.\n")); |
| return -1; |
| } |
| DET(("success\n")); |
| return 0; |
| } |
| |
| static int __devinit myri_load_lanai(struct myri_eth *mp) |
| { |
| struct net_device *dev = mp->dev; |
| struct myri_shmem __iomem *shmem = mp->shmem; |
| void __iomem *rptr; |
| int i; |
| |
| myri_disable_irq(mp->lregs, mp->cregs); |
| myri_reset_on(mp->cregs); |
| |
| rptr = mp->lanai; |
| for (i = 0; i < mp->eeprom.ramsz; i++) |
| sbus_writeb(0, rptr + i); |
| |
| if (mp->eeprom.cpuvers >= CPUVERS_3_0) |
| sbus_writel(mp->eeprom.cval, mp->lregs + LANAI_CVAL); |
| |
| /* Load executable code. */ |
| for (i = 0; i < sizeof(lanai4_code); i++) |
| sbus_writeb(lanai4_code[i], rptr + (lanai4_code_off * 2) + i); |
| |
| /* Load data segment. */ |
| for (i = 0; i < sizeof(lanai4_data); i++) |
| sbus_writeb(lanai4_data[i], rptr + (lanai4_data_off * 2) + i); |
| |
| /* Set device address. */ |
| sbus_writeb(0, &shmem->addr[0]); |
| sbus_writeb(0, &shmem->addr[1]); |
| for (i = 0; i < 6; i++) |
| sbus_writeb(dev->dev_addr[i], |
| &shmem->addr[i + 2]); |
| |
| /* Set SBUS bursts and interrupt mask. */ |
| sbus_writel(((mp->myri_bursts & 0xf8) >> 3), &shmem->burst); |
| sbus_writel(SHMEM_IMASK_RX, &shmem->imask); |
| |
| /* Release the LANAI. */ |
| myri_disable_irq(mp->lregs, mp->cregs); |
| myri_reset_off(mp->lregs, mp->cregs); |
| myri_disable_irq(mp->lregs, mp->cregs); |
| |
| /* Wait for the reset to complete. */ |
| for (i = 0; i < 5000; i++) { |
| if (sbus_readl(&shmem->channel.state) != STATE_READY) |
| break; |
| else |
| udelay(10); |
| } |
| |
| if (i == 5000) |
| printk(KERN_ERR "myricom: Chip would not reset after firmware load.\n"); |
| |
| i = myri_do_handshake(mp); |
| if (i) |
| printk(KERN_ERR "myricom: Handshake with LANAI failed.\n"); |
| |
| if (mp->eeprom.cpuvers == CPUVERS_4_0) |
| sbus_writel(0, mp->lregs + LANAI_VERS); |
| |
| return i; |
| } |
| |
| static void myri_clean_rings(struct myri_eth *mp) |
| { |
| struct sendq __iomem *sq = mp->sq; |
| struct recvq __iomem *rq = mp->rq; |
| int i; |
| |
| sbus_writel(0, &rq->tail); |
| sbus_writel(0, &rq->head); |
| for (i = 0; i < (RX_RING_SIZE+1); i++) { |
| if (mp->rx_skbs[i] != NULL) { |
| struct myri_rxd __iomem *rxd = &rq->myri_rxd[i]; |
| u32 dma_addr; |
| |
| dma_addr = sbus_readl(&rxd->myri_scatters[0].addr); |
| sbus_unmap_single(mp->myri_sdev, dma_addr, RX_ALLOC_SIZE, SBUS_DMA_FROMDEVICE); |
| dev_kfree_skb(mp->rx_skbs[i]); |
| mp->rx_skbs[i] = NULL; |
| } |
| } |
| |
| mp->tx_old = 0; |
| sbus_writel(0, &sq->tail); |
| sbus_writel(0, &sq->head); |
| for (i = 0; i < TX_RING_SIZE; i++) { |
| if (mp->tx_skbs[i] != NULL) { |
| struct sk_buff *skb = mp->tx_skbs[i]; |
| struct myri_txd __iomem *txd = &sq->myri_txd[i]; |
| u32 dma_addr; |
| |
| dma_addr = sbus_readl(&txd->myri_gathers[0].addr); |
| sbus_unmap_single(mp->myri_sdev, dma_addr, (skb->len + 3) & ~3, SBUS_DMA_TODEVICE); |
| dev_kfree_skb(mp->tx_skbs[i]); |
| mp->tx_skbs[i] = NULL; |
| } |
| } |
| } |
| |
| static void myri_init_rings(struct myri_eth *mp, int from_irq) |
| { |
| struct recvq __iomem *rq = mp->rq; |
| struct myri_rxd __iomem *rxd = &rq->myri_rxd[0]; |
| struct net_device *dev = mp->dev; |
| gfp_t gfp_flags = GFP_KERNEL; |
| int i; |
| |
| if (from_irq || in_interrupt()) |
| gfp_flags = GFP_ATOMIC; |
| |
| myri_clean_rings(mp); |
| for (i = 0; i < RX_RING_SIZE; i++) { |
| struct sk_buff *skb = myri_alloc_skb(RX_ALLOC_SIZE, gfp_flags); |
| u32 dma_addr; |
| |
| if (!skb) |
| continue; |
| mp->rx_skbs[i] = skb; |
| skb->dev = dev; |
| skb_put(skb, RX_ALLOC_SIZE); |
| |
| dma_addr = sbus_map_single(mp->myri_sdev, skb->data, RX_ALLOC_SIZE, SBUS_DMA_FROMDEVICE); |
| sbus_writel(dma_addr, &rxd[i].myri_scatters[0].addr); |
| sbus_writel(RX_ALLOC_SIZE, &rxd[i].myri_scatters[0].len); |
| sbus_writel(i, &rxd[i].ctx); |
| sbus_writel(1, &rxd[i].num_sg); |
| } |
| sbus_writel(0, &rq->head); |
| sbus_writel(RX_RING_SIZE, &rq->tail); |
| } |
| |
| static int myri_init(struct myri_eth *mp, int from_irq) |
| { |
| myri_init_rings(mp, from_irq); |
| return 0; |
| } |
| |
| static void myri_is_not_so_happy(struct myri_eth *mp) |
| { |
| } |
| |
| #ifdef DEBUG_HEADER |
| static void dump_ehdr(struct ethhdr *ehdr) |
| { |
| printk("ehdr[h_dst(%02x:%02x:%02x:%02x:%02x:%02x)" |
| "h_source(%02x:%02x:%02x:%02x:%02x:%02x)h_proto(%04x)]\n", |
| ehdr->h_dest[0], ehdr->h_dest[1], ehdr->h_dest[2], |
| ehdr->h_dest[3], ehdr->h_dest[4], ehdr->h_dest[4], |
| ehdr->h_source[0], ehdr->h_source[1], ehdr->h_source[2], |
| ehdr->h_source[3], ehdr->h_source[4], ehdr->h_source[4], |
| ehdr->h_proto); |
| } |
| |
| static void dump_ehdr_and_myripad(unsigned char *stuff) |
| { |
| struct ethhdr *ehdr = (struct ethhdr *) (stuff + 2); |
| |
| printk("pad[%02x:%02x]", stuff[0], stuff[1]); |
| printk("ehdr[h_dst(%02x:%02x:%02x:%02x:%02x:%02x)" |
| "h_source(%02x:%02x:%02x:%02x:%02x:%02x)h_proto(%04x)]\n", |
| ehdr->h_dest[0], ehdr->h_dest[1], ehdr->h_dest[2], |
| ehdr->h_dest[3], ehdr->h_dest[4], ehdr->h_dest[4], |
| ehdr->h_source[0], ehdr->h_source[1], ehdr->h_source[2], |
| ehdr->h_source[3], ehdr->h_source[4], ehdr->h_source[4], |
| ehdr->h_proto); |
| } |
| #endif |
| |
| static void myri_tx(struct myri_eth *mp, struct net_device *dev) |
| { |
| struct sendq __iomem *sq= mp->sq; |
| int entry = mp->tx_old; |
| int limit = sbus_readl(&sq->head); |
| |
| DTX(("entry[%d] limit[%d] ", entry, limit)); |
| if (entry == limit) |
| return; |
| while (entry != limit) { |
| struct sk_buff *skb = mp->tx_skbs[entry]; |
| u32 dma_addr; |
| |
| DTX(("SKB[%d] ", entry)); |
| dma_addr = sbus_readl(&sq->myri_txd[entry].myri_gathers[0].addr); |
| sbus_unmap_single(mp->myri_sdev, dma_addr, skb->len, SBUS_DMA_TODEVICE); |
| dev_kfree_skb(skb); |
| mp->tx_skbs[entry] = NULL; |
| mp->enet_stats.tx_packets++; |
| entry = NEXT_TX(entry); |
| } |
| mp->tx_old = entry; |
| } |
| |
| /* Determine the packet's protocol ID. The rule here is that we |
| * assume 802.3 if the type field is short enough to be a length. |
| * This is normal practice and works for any 'now in use' protocol. |
| */ |
| static __be16 myri_type_trans(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct ethhdr *eth; |
| unsigned char *rawp; |
| |
| skb->mac.raw = (((unsigned char *)skb->data) + MYRI_PAD_LEN); |
| skb_pull(skb, dev->hard_header_len); |
| eth = eth_hdr(skb); |
| |
| #ifdef DEBUG_HEADER |
| DHDR(("myri_type_trans: ")); |
| dump_ehdr(eth); |
| #endif |
| if (*eth->h_dest & 1) { |
| if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN)==0) |
| skb->pkt_type = PACKET_BROADCAST; |
| else |
| skb->pkt_type = PACKET_MULTICAST; |
| } else if (dev->flags & (IFF_PROMISC|IFF_ALLMULTI)) { |
| if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN)) |
| skb->pkt_type = PACKET_OTHERHOST; |
| } |
| |
| if (ntohs(eth->h_proto) >= 1536) |
| return eth->h_proto; |
| |
| rawp = skb->data; |
| |
| /* This is a magic hack to spot IPX packets. Older Novell breaks |
| * the protocol design and runs IPX over 802.3 without an 802.2 LLC |
| * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This |
| * won't work for fault tolerant netware but does for the rest. |
| */ |
| if (*(unsigned short *)rawp == 0xFFFF) |
| return htons(ETH_P_802_3); |
| |
| /* Real 802.2 LLC */ |
| return htons(ETH_P_802_2); |
| } |
| |
| static void myri_rx(struct myri_eth *mp, struct net_device *dev) |
| { |
| struct recvq __iomem *rq = mp->rq; |
| struct recvq __iomem *rqa = mp->rqack; |
| int entry = sbus_readl(&rqa->head); |
| int limit = sbus_readl(&rqa->tail); |
| int drops; |
| |
| DRX(("entry[%d] limit[%d] ", entry, limit)); |
| if (entry == limit) |
| return; |
| drops = 0; |
| DRX(("\n")); |
| while (entry != limit) { |
| struct myri_rxd __iomem *rxdack = &rqa->myri_rxd[entry]; |
| u32 csum = sbus_readl(&rxdack->csum); |
| int len = sbus_readl(&rxdack->myri_scatters[0].len); |
| int index = sbus_readl(&rxdack->ctx); |
| struct myri_rxd __iomem *rxd = &rq->myri_rxd[sbus_readl(&rq->tail)]; |
| struct sk_buff *skb = mp->rx_skbs[index]; |
| |
| /* Ack it. */ |
| sbus_writel(NEXT_RX(entry), &rqa->head); |
| |
| /* Check for errors. */ |
| DRX(("rxd[%d]: %p len[%d] csum[%08x] ", entry, rxd, len, csum)); |
| sbus_dma_sync_single_for_cpu(mp->myri_sdev, |
| sbus_readl(&rxd->myri_scatters[0].addr), |
| RX_ALLOC_SIZE, SBUS_DMA_FROMDEVICE); |
| if (len < (ETH_HLEN + MYRI_PAD_LEN) || (skb->data[0] != MYRI_PAD_LEN)) { |
| DRX(("ERROR[")); |
| mp->enet_stats.rx_errors++; |
| if (len < (ETH_HLEN + MYRI_PAD_LEN)) { |
| DRX(("BAD_LENGTH] ")); |
| mp->enet_stats.rx_length_errors++; |
| } else { |
| DRX(("NO_PADDING] ")); |
| mp->enet_stats.rx_frame_errors++; |
| } |
| |
| /* Return it to the LANAI. */ |
| drop_it: |
| drops++; |
| DRX(("DROP ")); |
| mp->enet_stats.rx_dropped++; |
| 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); |
| 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); |
| memcpy(copy_skb->data, 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) |
| { |
| static int num; |
| static unsigned version_printed; |
| struct net_device *dev; |
| struct myri_eth *mp; |
| unsigned char prop_buf[32]; |
| int i; |
| |
| DET(("myri_ether_init(%p,%d):\n", sdev, num)); |
| dev = alloc_etherdev(sizeof(struct myri_eth)); |
| |
| if (!dev) |
| return -ENOMEM; |
| |
| if (version_printed++ == 0) |
| printk(version); |
| |
| SET_MODULE_OWNER(dev); |
| SET_NETDEV_DEV(dev, &sdev->ofdev.dev); |
| |
| mp = (struct myri_eth *) dev->priv; |
| spin_lock_init(&mp->irq_lock); |
| mp->myri_sdev = sdev; |
| |
| /* Clean out skb arrays. */ |
| for (i = 0; i < (RX_RING_SIZE + 1); i++) |
| mp->rx_skbs[i] = NULL; |
| |
| for (i = 0; i < TX_RING_SIZE; i++) |
| mp->tx_skbs[i] = NULL; |
| |
| /* First check for EEPROM information. */ |
| i = prom_getproperty(sdev->prom_node, "myrinet-eeprom-info", |
| (char *)&mp->eeprom, sizeof(struct myri_eeprom)); |
| DET(("prom_getprop(myrinet-eeprom-info) returns %d\n", i)); |
| if (i == 0 || i == -1) { |
| /* No eeprom property, must cook up the values ourselves. */ |
| DET(("No EEPROM: ")); |
| mp->eeprom.bus_type = BUS_TYPE_SBUS; |
| mp->eeprom.cpuvers = prom_getintdefault(sdev->prom_node,"cpu_version",0); |
| mp->eeprom.cval = prom_getintdefault(sdev->prom_node,"clock_value",0); |
| mp->eeprom.ramsz = prom_getintdefault(sdev->prom_node,"sram_size",0); |
| DET(("cpuvers[%d] cval[%d] ramsz[%d]\n", mp->eeprom.cpuvers, |
| mp->eeprom.cval, mp->eeprom.ramsz)); |
| if (mp->eeprom.cpuvers == 0) { |
| DET(("EEPROM: cpuvers was zero, setting to %04x\n",CPUVERS_2_3)); |
| mp->eeprom.cpuvers = CPUVERS_2_3; |
| } |
| if (mp->eeprom.cpuvers < CPUVERS_3_0) { |
| DET(("EEPROM: cpuvers < CPUVERS_3_0, clockval set to zero.\n")); |
| mp->eeprom.cval = 0; |
| } |
| if (mp->eeprom.ramsz == 0) { |
| DET(("EEPROM: ramsz == 0, setting to 128k\n")); |
| mp->eeprom.ramsz = (128 * 1024); |
| } |
| i = prom_getproperty(sdev->prom_node, "myrinet-board-id", |
| &prop_buf[0], 10); |
| DET(("EEPROM: prom_getprop(myrinet-board-id) returns %d\n", i)); |
| if ((i != 0) && (i != -1)) |
| memcpy(&mp->eeprom.id[0], &prop_buf[0], 6); |
| else |
| set_boardid_from_idprom(mp, num); |
| i = prom_getproperty(sdev->prom_node, "fpga_version", |
| &mp->eeprom.fvers[0], 32); |
| DET(("EEPROM: prom_getprop(fpga_version) returns %d\n", i)); |
| if (i == 0 || i == -1) |
| memset(&mp->eeprom.fvers[0], 0, 32); |
| |
| if (mp->eeprom.cpuvers == CPUVERS_4_1) { |
| DET(("EEPROM: cpuvers CPUVERS_4_1, ")); |
| if (mp->eeprom.ramsz == (128 * 1024)) { |
| DET(("ramsize 128k, setting to 256k, ")); |
| mp->eeprom.ramsz = (256 * 1024); |
| } |
| if ((mp->eeprom.cval==0x40414041)||(mp->eeprom.cval==0x90449044)){ |
| DET(("changing cval from %08x to %08x ", |
| mp->eeprom.cval, 0x50e450e4)); |
| mp->eeprom.cval = 0x50e450e4; |
| } |
| DET(("\n")); |
| } |
| } |
| #ifdef DEBUG_DETECT |
| dump_eeprom(mp); |
| #endif |
| |
| for (i = 0; i < 6; i++) |
| dev->dev_addr[i] = mp->eeprom.id[i]; |
| |
| determine_reg_space_size(mp); |
| |
| /* Map in the MyriCOM register/localram set. */ |
| if (mp->eeprom.cpuvers < CPUVERS_4_0) { |
| /* XXX Makes no sense, if control reg is non-existant this |
| * XXX driver cannot function at all... maybe pre-4.0 is |
| * XXX only a valid version for PCI cards? Ask feldy... |
| */ |
| DET(("Mapping regs for cpuvers < CPUVERS_4_0\n")); |
| mp->regs = sbus_ioremap(&sdev->resource[0], 0, |
| mp->reg_size, "MyriCOM Regs"); |
| if (!mp->regs) { |
| printk("MyriCOM: Cannot map MyriCOM registers.\n"); |
| goto err; |
| } |
| mp->lanai = mp->regs + (256 * 1024); |
| mp->lregs = mp->lanai + (0x10000 * 2); |
| } else { |
| DET(("Mapping regs for cpuvers >= CPUVERS_4_0\n")); |
| mp->cregs = sbus_ioremap(&sdev->resource[0], 0, |
| PAGE_SIZE, "MyriCOM Control Regs"); |
| mp->lregs = sbus_ioremap(&sdev->resource[0], (256 * 1024), |
| PAGE_SIZE, "MyriCOM LANAI Regs"); |
| mp->lanai = |
| sbus_ioremap(&sdev->resource[0], (512 * 1024), |
| mp->eeprom.ramsz, "MyriCOM SRAM"); |
| } |
| DET(("Registers mapped: cregs[%p] lregs[%p] lanai[%p]\n", |
| mp->cregs, mp->lregs, mp->lanai)); |
| |
| if (mp->eeprom.cpuvers >= CPUVERS_4_0) |
| mp->shmem_base = 0xf000; |
| else |
| mp->shmem_base = 0x8000; |
| |
| DET(("Shared memory base is %04x, ", mp->shmem_base)); |
| |
| mp->shmem = (struct myri_shmem __iomem *) |
| (mp->lanai + (mp->shmem_base * 2)); |
| DET(("shmem mapped at %p\n", mp->shmem)); |
| |
| mp->rqack = &mp->shmem->channel.recvqa; |
| mp->rq = &mp->shmem->channel.recvq; |
| mp->sq = &mp->shmem->channel.sendq; |
| |
| /* Reset the board. */ |
| DET(("Resetting LANAI\n")); |
| myri_reset_off(mp->lregs, mp->cregs); |
| myri_reset_on(mp->cregs); |
| |
| /* Turn IRQ's off. */ |
| myri_disable_irq(mp->lregs, mp->cregs); |
| |
| /* Reset once more. */ |
| myri_reset_on(mp->cregs); |
| |
| /* Get the supported DVMA burst sizes from our SBUS. */ |
| mp->myri_bursts = prom_getintdefault(mp->myri_sdev->bus->prom_node, |
| "burst-sizes", 0x00); |
| |
| if (!sbus_can_burst64(sdev)) |
| mp->myri_bursts &= ~(DMA_BURST64); |
| |
| DET(("MYRI bursts %02x\n", mp->myri_bursts)); |
| |
| /* Encode SBUS interrupt level in second control register. */ |
| i = prom_getint(sdev->prom_node, "interrupts"); |
| if (i == 0) |
| i = 4; |
| DET(("prom_getint(interrupts)==%d, irqlvl set to %04x\n", |
| i, (1 << i))); |
| |
| sbus_writel((1 << i), mp->cregs + MYRICTRL_IRQLVL); |
| |
| mp->dev = dev; |
| dev->open = &myri_open; |
| dev->stop = &myri_close; |
| dev->hard_start_xmit = &myri_start_xmit; |
| dev->tx_timeout = &myri_tx_timeout; |
| dev->watchdog_timeo = 5*HZ; |
| dev->get_stats = &myri_get_stats; |
| dev->set_multicast_list = &myri_set_multicast; |
| dev->irq = sdev->irqs[0]; |
| |
| /* Register interrupt handler now. */ |
| DET(("Requesting MYRIcom IRQ line.\n")); |
| if (request_irq(dev->irq, &myri_interrupt, |
| IRQF_SHARED, "MyriCOM Ethernet", (void *) dev)) { |
| printk("MyriCOM: Cannot register interrupt handler.\n"); |
| goto err; |
| } |
| |
| dev->mtu = MYRINET_MTU; |
| dev->change_mtu = myri_change_mtu; |
| dev->hard_header = myri_header; |
| dev->rebuild_header = myri_rebuild_header; |
| dev->hard_header_len = (ETH_HLEN + MYRI_PAD_LEN); |
| dev->hard_header_cache = myri_header_cache; |
| dev->header_cache_update= myri_header_cache_update; |
| |
| /* Load code onto the LANai. */ |
| DET(("Loading LANAI firmware\n")); |
| myri_load_lanai(mp); |
| |
| if (register_netdev(dev)) { |
| printk("MyriCOM: Cannot register device.\n"); |
| goto err_free_irq; |
| } |
| |
| dev_set_drvdata(&sdev->ofdev.dev, mp); |
| |
| num++; |
| |
| printk("%s: MyriCOM MyriNET Ethernet ", dev->name); |
| |
| for (i = 0; i < 6; i++) |
| printk("%2.2x%c", dev->dev_addr[i], |
| i == 5 ? ' ' : ':'); |
| printk("\n"); |
| |
| return 0; |
| |
| err_free_irq: |
| free_irq(dev->irq, dev); |
| err: |
| /* This will also free the co-allocated 'dev->priv' */ |
| free_netdev(dev); |
| return -ENODEV; |
| } |
| |
| |
| static int __devinit myri_sbus_probe(struct of_device *dev, const struct of_device_id *match) |
| { |
| struct sbus_dev *sdev = to_sbus_device(&dev->dev); |
| |
| return myri_ether_init(sdev); |
| } |
| |
| static int __devexit myri_sbus_remove(struct of_device *dev) |
| { |
| struct myri_eth *mp = dev_get_drvdata(&dev->dev); |
| struct net_device *net_dev = mp->dev; |
| |
| unregister_netdevice(net_dev); |
| |
| free_irq(net_dev->irq, net_dev); |
| |
| if (mp->eeprom.cpuvers < CPUVERS_4_0) { |
| sbus_iounmap(mp->regs, mp->reg_size); |
| } else { |
| sbus_iounmap(mp->cregs, PAGE_SIZE); |
| sbus_iounmap(mp->lregs, (256 * 1024)); |
| sbus_iounmap(mp->lanai, (512 * 1024)); |
| } |
| |
| free_netdev(net_dev); |
| |
| dev_set_drvdata(&dev->dev, NULL); |
| |
| return 0; |
| } |
| |
| static struct of_device_id myri_sbus_match[] = { |
| { |
| .name = "MYRICOM,mlanai", |
| }, |
| { |
| .name = "myri", |
| }, |
| {}, |
| }; |
| |
| MODULE_DEVICE_TABLE(of, myri_sbus_match); |
| |
| static struct of_platform_driver myri_sbus_driver = { |
| .name = "myri", |
| .match_table = myri_sbus_match, |
| .probe = myri_sbus_probe, |
| .remove = __devexit_p(myri_sbus_remove), |
| }; |
| |
| static int __init myri_sbus_init(void) |
| { |
| return of_register_driver(&myri_sbus_driver, &sbus_bus_type); |
| } |
| |
| static void __exit myri_sbus_exit(void) |
| { |
| of_unregister_driver(&myri_sbus_driver); |
| } |
| |
| module_init(myri_sbus_init); |
| module_exit(myri_sbus_exit); |
| |
| MODULE_LICENSE("GPL"); |