--- /dev/null
+/*
+ * rrunner.c: Linux driver for the Essential RoadRunner HIPPI board.
+ *
+ * Copyright (C) 1998-2002 by Jes Sorensen, <jes@wildopensource.com>.
+ *
+ * Thanks to Essential Communication for providing us with hardware
+ * and very comprehensive documentation without which I would not have
+ * been able to write this driver. A special thank you to John Gibbon
+ * for sorting out the legal issues, with the NDA, allowing the code to
+ * be released under the GPL.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Thanks to Jayaram Bhat from ODS/Essential for fixing some of the
+ * stupid bugs in my code.
+ *
+ * Softnet support and various other patches from Val Henson of
+ * ODS/Essential.
+ *
+ * PCI DMA mapping code partly based on work by Francois Romieu.
+ */
+
+
+#define DEBUG 1
+#define RX_DMA_SKBUFF 1
+#define PKT_COPY_THRESHOLD 512
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/hippidevice.h>
+#include <linux/skbuff.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <net/sock.h>
+
+#include <asm/cache.h>
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+
+#define rr_if_busy(dev) netif_queue_stopped(dev)
+#define rr_if_running(dev) netif_running(dev)
+
+#include "rrunner.h"
+
+#define RUN_AT(x) (jiffies + (x))
+
+
+MODULE_AUTHOR("Jes Sorensen <jes@wildopensource.com>");
+MODULE_DESCRIPTION("Essential RoadRunner HIPPI driver");
+MODULE_LICENSE("GPL");
+
+static char version[] = "rrunner.c: v0.50 11/11/2002 Jes Sorensen (jes@wildopensource.com)\n";
+
+
+static const struct net_device_ops rr_netdev_ops = {
+ .ndo_open = rr_open,
+ .ndo_stop = rr_close,
+ .ndo_do_ioctl = rr_ioctl,
+ .ndo_start_xmit = rr_start_xmit,
+ .ndo_change_mtu = hippi_change_mtu,
+ .ndo_set_mac_address = hippi_mac_addr,
+};
+
+/*
+ * Implementation notes:
+ *
+ * The DMA engine only allows for DMA within physical 64KB chunks of
+ * memory. The current approach of the driver (and stack) is to use
+ * linear blocks of memory for the skbuffs. However, as the data block
+ * is always the first part of the skb and skbs are 2^n aligned so we
+ * are guarantted to get the whole block within one 64KB align 64KB
+ * chunk.
+ *
+ * On the long term, relying on being able to allocate 64KB linear
+ * chunks of memory is not feasible and the skb handling code and the
+ * stack will need to know about I/O vectors or something similar.
+ */
+
+static int rr_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ struct net_device *dev;
+ static int version_disp;
+ u8 pci_latency;
+ struct rr_private *rrpriv;
+ void *tmpptr;
+ dma_addr_t ring_dma;
+ int ret = -ENOMEM;
+
+ dev = alloc_hippi_dev(sizeof(struct rr_private));
+ if (!dev)
+ goto out3;
+
+ ret = pci_enable_device(pdev);
+ if (ret) {
+ ret = -ENODEV;
+ goto out2;
+ }
+
+ rrpriv = netdev_priv(dev);
+
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ ret = pci_request_regions(pdev, "rrunner");
+ if (ret < 0)
+ goto out;
+
+ pci_set_drvdata(pdev, dev);
+
+ rrpriv->pci_dev = pdev;
+
+ spin_lock_init(&rrpriv->lock);
+
+ dev->netdev_ops = &rr_netdev_ops;
+
+ /* display version info if adapter is found */
+ if (!version_disp) {
+ /* set display flag to TRUE so that */
+ /* we only display this string ONCE */
+ version_disp = 1;
+ printk(version);
+ }
+
+ pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &pci_latency);
+ if (pci_latency <= 0x58){
+ pci_latency = 0x58;
+ pci_write_config_byte(pdev, PCI_LATENCY_TIMER, pci_latency);
+ }
+
+ pci_set_master(pdev);
+
+ printk(KERN_INFO "%s: Essential RoadRunner serial HIPPI "
+ "at 0x%llx, irq %i, PCI latency %i\n", dev->name,
+ (unsigned long long)pci_resource_start(pdev, 0),
+ pdev->irq, pci_latency);
+
+ /*
+ * Remap the MMIO regs into kernel space.
+ */
+ rrpriv->regs = pci_iomap(pdev, 0, 0x1000);
+ if (!rrpriv->regs) {
+ printk(KERN_ERR "%s: Unable to map I/O register, "
+ "RoadRunner will be disabled.\n", dev->name);
+ ret = -EIO;
+ goto out;
+ }
+
+ tmpptr = pci_alloc_consistent(pdev, TX_TOTAL_SIZE, &ring_dma);
+ rrpriv->tx_ring = tmpptr;
+ rrpriv->tx_ring_dma = ring_dma;
+
+ if (!tmpptr) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ tmpptr = pci_alloc_consistent(pdev, RX_TOTAL_SIZE, &ring_dma);
+ rrpriv->rx_ring = tmpptr;
+ rrpriv->rx_ring_dma = ring_dma;
+
+ if (!tmpptr) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ tmpptr = pci_alloc_consistent(pdev, EVT_RING_SIZE, &ring_dma);
+ rrpriv->evt_ring = tmpptr;
+ rrpriv->evt_ring_dma = ring_dma;
+
+ if (!tmpptr) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ /*
+ * Don't access any register before this point!
+ */
+#ifdef __BIG_ENDIAN
+ writel(readl(&rrpriv->regs->HostCtrl) | NO_SWAP,
+ &rrpriv->regs->HostCtrl);
+#endif
+ /*
+ * Need to add a case for little-endian 64-bit hosts here.
+ */
+
+ rr_init(dev);
+
+ ret = register_netdev(dev);
+ if (ret)
+ goto out;
+ return 0;
+
+ out:
+ if (rrpriv->evt_ring)
+ pci_free_consistent(pdev, EVT_RING_SIZE, rrpriv->evt_ring,
+ rrpriv->evt_ring_dma);
+ if (rrpriv->rx_ring)
+ pci_free_consistent(pdev, RX_TOTAL_SIZE, rrpriv->rx_ring,
+ rrpriv->rx_ring_dma);
+ if (rrpriv->tx_ring)
+ pci_free_consistent(pdev, TX_TOTAL_SIZE, rrpriv->tx_ring,
+ rrpriv->tx_ring_dma);
+ if (rrpriv->regs)
+ pci_iounmap(pdev, rrpriv->regs);
+ if (pdev)
+ pci_release_regions(pdev);
+ out2:
+ free_netdev(dev);
+ out3:
+ return ret;
+}
+
+static void rr_remove_one(struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+ struct rr_private *rr = netdev_priv(dev);
+
+ if (!(readl(&rr->regs->HostCtrl) & NIC_HALTED)) {
+ printk(KERN_ERR "%s: trying to unload running NIC\n",
+ dev->name);
+ writel(HALT_NIC, &rr->regs->HostCtrl);
+ }
+
+ unregister_netdev(dev);
+ pci_free_consistent(pdev, EVT_RING_SIZE, rr->evt_ring,
+ rr->evt_ring_dma);
+ pci_free_consistent(pdev, RX_TOTAL_SIZE, rr->rx_ring,
+ rr->rx_ring_dma);
+ pci_free_consistent(pdev, TX_TOTAL_SIZE, rr->tx_ring,
+ rr->tx_ring_dma);
+ pci_iounmap(pdev, rr->regs);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ free_netdev(dev);
+}
+
+
+/*
+ * Commands are considered to be slow, thus there is no reason to
+ * inline this.
+ */
+static void rr_issue_cmd(struct rr_private *rrpriv, struct cmd *cmd)
+{
+ struct rr_regs __iomem *regs;
+ u32 idx;
+
+ regs = rrpriv->regs;
+ /*
+ * This is temporary - it will go away in the final version.
+ * We probably also want to make this function inline.
+ */
+ if (readl(®s->HostCtrl) & NIC_HALTED){
+ printk("issuing command for halted NIC, code 0x%x, "
+ "HostCtrl %08x\n", cmd->code, readl(®s->HostCtrl));
+ if (readl(®s->Mode) & FATAL_ERR)
+ printk("error codes Fail1 %02x, Fail2 %02x\n",
+ readl(®s->Fail1), readl(®s->Fail2));
+ }
+
+ idx = rrpriv->info->cmd_ctrl.pi;
+
+ writel(*(u32*)(cmd), ®s->CmdRing[idx]);
+ wmb();
+
+ idx = (idx - 1) % CMD_RING_ENTRIES;
+ rrpriv->info->cmd_ctrl.pi = idx;
+ wmb();
+
+ if (readl(®s->Mode) & FATAL_ERR)
+ printk("error code %02x\n", readl(®s->Fail1));
+}
+
+
+/*
+ * Reset the board in a sensible manner. The NIC is already halted
+ * when we get here and a spin-lock is held.
+ */
+static int rr_reset(struct net_device *dev)
+{
+ struct rr_private *rrpriv;
+ struct rr_regs __iomem *regs;
+ u32 start_pc;
+ int i;
+
+ rrpriv = netdev_priv(dev);
+ regs = rrpriv->regs;
+
+ rr_load_firmware(dev);
+
+ writel(0x01000000, ®s->TX_state);
+ writel(0xff800000, ®s->RX_state);
+ writel(0, ®s->AssistState);
+ writel(CLEAR_INTA, ®s->LocalCtrl);
+ writel(0x01, ®s->BrkPt);
+ writel(0, ®s->Timer);
+ writel(0, ®s->TimerRef);
+ writel(RESET_DMA, ®s->DmaReadState);
+ writel(RESET_DMA, ®s->DmaWriteState);
+ writel(0, ®s->DmaWriteHostHi);
+ writel(0, ®s->DmaWriteHostLo);
+ writel(0, ®s->DmaReadHostHi);
+ writel(0, ®s->DmaReadHostLo);
+ writel(0, ®s->DmaReadLen);
+ writel(0, ®s->DmaWriteLen);
+ writel(0, ®s->DmaWriteLcl);
+ writel(0, ®s->DmaWriteIPchecksum);
+ writel(0, ®s->DmaReadLcl);
+ writel(0, ®s->DmaReadIPchecksum);
+ writel(0, ®s->PciState);
+#if (BITS_PER_LONG == 64) && defined __LITTLE_ENDIAN
+ writel(SWAP_DATA | PTR64BIT | PTR_WD_SWAP, ®s->Mode);
+#elif (BITS_PER_LONG == 64)
+ writel(SWAP_DATA | PTR64BIT | PTR_WD_NOSWAP, ®s->Mode);
+#else
+ writel(SWAP_DATA | PTR32BIT | PTR_WD_NOSWAP, ®s->Mode);
+#endif
+
+#if 0
+ /*
+ * Don't worry, this is just black magic.
+ */
+ writel(0xdf000, ®s->RxBase);
+ writel(0xdf000, ®s->RxPrd);
+ writel(0xdf000, ®s->RxCon);
+ writel(0xce000, ®s->TxBase);
+ writel(0xce000, ®s->TxPrd);
+ writel(0xce000, ®s->TxCon);
+ writel(0, ®s->RxIndPro);
+ writel(0, ®s->RxIndCon);
+ writel(0, ®s->RxIndRef);
+ writel(0, ®s->TxIndPro);
+ writel(0, ®s->TxIndCon);
+ writel(0, ®s->TxIndRef);
+ writel(0xcc000, ®s->pad10[0]);
+ writel(0, ®s->DrCmndPro);
+ writel(0, ®s->DrCmndCon);
+ writel(0, ®s->DwCmndPro);
+ writel(0, ®s->DwCmndCon);
+ writel(0, ®s->DwCmndRef);
+ writel(0, ®s->DrDataPro);
+ writel(0, ®s->DrDataCon);
+ writel(0, ®s->DrDataRef);
+ writel(0, ®s->DwDataPro);
+ writel(0, ®s->DwDataCon);
+ writel(0, ®s->DwDataRef);
+#endif
+
+ writel(0xffffffff, ®s->MbEvent);
+ writel(0, ®s->Event);
+
+ writel(0, ®s->TxPi);
+ writel(0, ®s->IpRxPi);
+
+ writel(0, ®s->EvtCon);
+ writel(0, ®s->EvtPrd);
+
+ rrpriv->info->evt_ctrl.pi = 0;
+
+ for (i = 0; i < CMD_RING_ENTRIES; i++)
+ writel(0, ®s->CmdRing[i]);
+
+/*
+ * Why 32 ? is this not cache line size dependent?
+ */
+ writel(RBURST_64|WBURST_64, ®s->PciState);
+ wmb();
+
+ start_pc = rr_read_eeprom_word(rrpriv,
+ offsetof(struct eeprom, rncd_info.FwStart));
+
+#if (DEBUG > 1)
+ printk("%s: Executing firmware at address 0x%06x\n",
+ dev->name, start_pc);
+#endif
+
+ writel(start_pc + 0x800, ®s->Pc);
+ wmb();
+ udelay(5);
+
+ writel(start_pc, ®s->Pc);
+ wmb();
+
+ return 0;
+}
+
+
+/*
+ * Read a string from the EEPROM.
+ */
+static unsigned int rr_read_eeprom(struct rr_private *rrpriv,
+ unsigned long offset,
+ unsigned char *buf,
+ unsigned long length)
+{
+ struct rr_regs __iomem *regs = rrpriv->regs;
+ u32 misc, io, host, i;
+
+ io = readl(®s->ExtIo);
+ writel(0, ®s->ExtIo);
+ misc = readl(®s->LocalCtrl);
+ writel(0, ®s->LocalCtrl);
+ host = readl(®s->HostCtrl);
+ writel(host | HALT_NIC, ®s->HostCtrl);
+ mb();
+
+ for (i = 0; i < length; i++){
+ writel((EEPROM_BASE + ((offset+i) << 3)), ®s->WinBase);
+ mb();
+ buf[i] = (readl(®s->WinData) >> 24) & 0xff;
+ mb();
+ }
+
+ writel(host, ®s->HostCtrl);
+ writel(misc, ®s->LocalCtrl);
+ writel(io, ®s->ExtIo);
+ mb();
+ return i;
+}
+
+
+/*
+ * Shortcut to read one word (4 bytes) out of the EEPROM and convert
+ * it to our CPU byte-order.
+ */
+static u32 rr_read_eeprom_word(struct rr_private *rrpriv,
+ size_t offset)
+{
+ __be32 word;
+
+ if ((rr_read_eeprom(rrpriv, offset,
+ (unsigned char *)&word, 4) == 4))
+ return be32_to_cpu(word);
+ return 0;
+}
+
+
+/*
+ * Write a string to the EEPROM.
+ *
+ * This is only called when the firmware is not running.
+ */
+static unsigned int write_eeprom(struct rr_private *rrpriv,
+ unsigned long offset,
+ unsigned char *buf,
+ unsigned long length)
+{
+ struct rr_regs __iomem *regs = rrpriv->regs;
+ u32 misc, io, data, i, j, ready, error = 0;
+
+ io = readl(®s->ExtIo);
+ writel(0, ®s->ExtIo);
+ misc = readl(®s->LocalCtrl);
+ writel(ENABLE_EEPROM_WRITE, ®s->LocalCtrl);
+ mb();
+
+ for (i = 0; i < length; i++){
+ writel((EEPROM_BASE + ((offset+i) << 3)), ®s->WinBase);
+ mb();
+ data = buf[i] << 24;
+ /*
+ * Only try to write the data if it is not the same
+ * value already.
+ */
+ if ((readl(®s->WinData) & 0xff000000) != data){
+ writel(data, ®s->WinData);
+ ready = 0;
+ j = 0;
+ mb();
+ while(!ready){
+ udelay(20);
+ if ((readl(®s->WinData) & 0xff000000) ==
+ data)
+ ready = 1;
+ mb();
+ if (j++ > 5000){
+ printk("data mismatch: %08x, "
+ "WinData %08x\n", data,
+ readl(®s->WinData));
+ ready = 1;
+ error = 1;
+ }
+ }
+ }
+ }
+
+ writel(misc, ®s->LocalCtrl);
+ writel(io, ®s->ExtIo);
+ mb();
+
+ return error;
+}
+
+
+static int rr_init(struct net_device *dev)
+{
+ struct rr_private *rrpriv;
+ struct rr_regs __iomem *regs;
+ u32 sram_size, rev;
+
+ rrpriv = netdev_priv(dev);
+ regs = rrpriv->regs;
+
+ rev = readl(®s->FwRev);
+ rrpriv->fw_rev = rev;
+ if (rev > 0x00020024)
+ printk(" Firmware revision: %i.%i.%i\n", (rev >> 16),
+ ((rev >> 8) & 0xff), (rev & 0xff));
+ else if (rev >= 0x00020000) {
+ printk(" Firmware revision: %i.%i.%i (2.0.37 or "
+ "later is recommended)\n", (rev >> 16),
+ ((rev >> 8) & 0xff), (rev & 0xff));
+ }else{
+ printk(" Firmware revision too old: %i.%i.%i, please "
+ "upgrade to 2.0.37 or later.\n",
+ (rev >> 16), ((rev >> 8) & 0xff), (rev & 0xff));
+ }
+
+#if (DEBUG > 2)
+ printk(" Maximum receive rings %i\n", readl(®s->MaxRxRng));
+#endif
+
+ /*
+ * Read the hardware address from the eeprom. The HW address
+ * is not really necessary for HIPPI but awfully convenient.
+ * The pointer arithmetic to put it in dev_addr is ugly, but
+ * Donald Becker does it this way for the GigE version of this
+ * card and it's shorter and more portable than any
+ * other method I've seen. -VAL
+ */
+
+ *(__be16 *)(dev->dev_addr) =
+ htons(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA)));
+ *(__be32 *)(dev->dev_addr+2) =
+ htonl(rr_read_eeprom_word(rrpriv, offsetof(struct eeprom, manf.BoardULA[4])));
+
+ printk(" MAC: %pM\n", dev->dev_addr);
+
+ sram_size = rr_read_eeprom_word(rrpriv, 8);
+ printk(" SRAM size 0x%06x\n", sram_size);
+
+ return 0;
+}
+
+
+static int rr_init1(struct net_device *dev)
+{
+ struct rr_private *rrpriv;
+ struct rr_regs __iomem *regs;
+ unsigned long myjif, flags;
+ struct cmd cmd;
+ u32 hostctrl;
+ int ecode = 0;
+ short i;
+
+ rrpriv = netdev_priv(dev);
+ regs = rrpriv->regs;
+
+ spin_lock_irqsave(&rrpriv->lock, flags);
+
+ hostctrl = readl(®s->HostCtrl);
+ writel(hostctrl | HALT_NIC | RR_CLEAR_INT, ®s->HostCtrl);
+ wmb();
+
+ if (hostctrl & PARITY_ERR){
+ printk("%s: Parity error halting NIC - this is serious!\n",
+ dev->name);
+ spin_unlock_irqrestore(&rrpriv->lock, flags);
+ ecode = -EFAULT;
+ goto error;
+ }
+
+ set_rxaddr(regs, rrpriv->rx_ctrl_dma);
+ set_infoaddr(regs, rrpriv->info_dma);
+
+ rrpriv->info->evt_ctrl.entry_size = sizeof(struct event);
+ rrpriv->info->evt_ctrl.entries = EVT_RING_ENTRIES;
+ rrpriv->info->evt_ctrl.mode = 0;
+ rrpriv->info->evt_ctrl.pi = 0;
+ set_rraddr(&rrpriv->info->evt_ctrl.rngptr, rrpriv->evt_ring_dma);
+
+ rrpriv->info->cmd_ctrl.entry_size = sizeof(struct cmd);
+ rrpriv->info->cmd_ctrl.entries = CMD_RING_ENTRIES;
+ rrpriv->info->cmd_ctrl.mode = 0;
+ rrpriv->info->cmd_ctrl.pi = 15;
+
+ for (i = 0; i < CMD_RING_ENTRIES; i++) {
+ writel(0, ®s->CmdRing[i]);
+ }
+
+ for (i = 0; i < TX_RING_ENTRIES; i++) {
+ rrpriv->tx_ring[i].size = 0;
+ set_rraddr(&rrpriv->tx_ring[i].addr, 0);
+ rrpriv->tx_skbuff[i] = NULL;
+ }
+ rrpriv->info->tx_ctrl.entry_size = sizeof(struct tx_desc);
+ rrpriv->info->tx_ctrl.entries = TX_RING_ENTRIES;
+ rrpriv->info->tx_ctrl.mode = 0;
+ rrpriv->info->tx_ctrl.pi = 0;
+ set_rraddr(&rrpriv->info->tx_ctrl.rngptr, rrpriv->tx_ring_dma);
+
+ /*
+ * Set dirty_tx before we start receiving interrupts, otherwise
+ * the interrupt handler might think it is supposed to process
+ * tx ints before we are up and running, which may cause a null
+ * pointer access in the int handler.
+ */
+ rrpriv->tx_full = 0;
+ rrpriv->cur_rx = 0;
+ rrpriv->dirty_rx = rrpriv->dirty_tx = 0;
+
+ rr_reset(dev);
+
+ /* Tuning values */
+ writel(0x5000, ®s->ConRetry);
+ writel(0x100, ®s->ConRetryTmr);
+ writel(0x500000, ®s->ConTmout);
+ writel(0x60, ®s->IntrTmr);
+ writel(0x500000, ®s->TxDataMvTimeout);
+ writel(0x200000, ®s->RxDataMvTimeout);
+ writel(0x80, ®s->WriteDmaThresh);
+ writel(0x80, ®s->ReadDmaThresh);
+
+ rrpriv->fw_running = 0;
+ wmb();
+
+ hostctrl &= ~(HALT_NIC | INVALID_INST_B | PARITY_ERR);
+ writel(hostctrl, ®s->HostCtrl);
+ wmb();
+
+ spin_unlock_irqrestore(&rrpriv->lock, flags);
+
+ for (i = 0; i < RX_RING_ENTRIES; i++) {
+ struct sk_buff *skb;
+ dma_addr_t addr;
+
+ rrpriv->rx_ring[i].mode = 0;
+ skb = alloc_skb(dev->mtu + HIPPI_HLEN, GFP_ATOMIC);
+ if (!skb) {
+ printk(KERN_WARNING "%s: Unable to allocate memory "
+ "for receive ring - halting NIC\n", dev->name);
+ ecode = -ENOMEM;
+ goto error;
+ }
+ rrpriv->rx_skbuff[i] = skb;
+ addr = pci_map_single(rrpriv->pci_dev, skb->data,
+ dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
+ /*
+ * Sanity test to see if we conflict with the DMA
+ * limitations of the Roadrunner.
+ */
+ if ((((unsigned long)skb->data) & 0xfff) > ~65320)
+ printk("skb alloc error\n");
+
+ set_rraddr(&rrpriv->rx_ring[i].addr, addr);
+ rrpriv->rx_ring[i].size = dev->mtu + HIPPI_HLEN;
+ }
+
+ rrpriv->rx_ctrl[4].entry_size = sizeof(struct rx_desc);
+ rrpriv->rx_ctrl[4].entries = RX_RING_ENTRIES;
+ rrpriv->rx_ctrl[4].mode = 8;
+ rrpriv->rx_ctrl[4].pi = 0;
+ wmb();
+ set_rraddr(&rrpriv->rx_ctrl[4].rngptr, rrpriv->rx_ring_dma);
+
+ udelay(1000);
+
+ /*
+ * Now start the FirmWare.
+ */
+ cmd.code = C_START_FW;
+ cmd.ring = 0;
+ cmd.index = 0;
+
+ rr_issue_cmd(rrpriv, &cmd);
+
+ /*
+ * Give the FirmWare time to chew on the `get running' command.
+ */
+ myjif = jiffies + 5 * HZ;
+ while (time_before(jiffies, myjif) && !rrpriv->fw_running)
+ cpu_relax();
+
+ netif_start_queue(dev);
+
+ return ecode;
+
+ error:
+ /*
+ * We might have gotten here because we are out of memory,
+ * make sure we release everything we allocated before failing
+ */
+ for (i = 0; i < RX_RING_ENTRIES; i++) {
+ struct sk_buff *skb = rrpriv->rx_skbuff[i];
+
+ if (skb) {
+ pci_unmap_single(rrpriv->pci_dev,
+ rrpriv->rx_ring[i].addr.addrlo,
+ dev->mtu + HIPPI_HLEN,
+ PCI_DMA_FROMDEVICE);
+ rrpriv->rx_ring[i].size = 0;
+ set_rraddr(&rrpriv->rx_ring[i].addr, 0);
+ dev_kfree_skb(skb);
+ rrpriv->rx_skbuff[i] = NULL;
+ }
+ }
+ return ecode;
+}
+
+
+/*
+ * All events are considered to be slow (RX/TX ints do not generate
+ * events) and are handled here, outside the main interrupt handler,
+ * to reduce the size of the handler.
+ */
+static u32 rr_handle_event(struct net_device *dev, u32 prodidx, u32 eidx)
+{
+ struct rr_private *rrpriv;
+ struct rr_regs __iomem *regs;
+ u32 tmp;
+
+ rrpriv = netdev_priv(dev);
+ regs = rrpriv->regs;
+
+ while (prodidx != eidx){
+ switch (rrpriv->evt_ring[eidx].code){
+ case E_NIC_UP:
+ tmp = readl(®s->FwRev);
+ printk(KERN_INFO "%s: Firmware revision %i.%i.%i "
+ "up and running\n", dev->name,
+ (tmp >> 16), ((tmp >> 8) & 0xff), (tmp & 0xff));
+ rrpriv->fw_running = 1;
+ writel(RX_RING_ENTRIES - 1, ®s->IpRxPi);
+ wmb();
+ break;
+ case E_LINK_ON:
+ printk(KERN_INFO "%s: Optical link ON\n", dev->name);
+ break;
+ case E_LINK_OFF:
+ printk(KERN_INFO "%s: Optical link OFF\n", dev->name);
+ break;
+ case E_RX_IDLE:
+ printk(KERN_WARNING "%s: RX data not moving\n",
+ dev->name);
+ goto drop;
+ case E_WATCHDOG:
+ printk(KERN_INFO "%s: The watchdog is here to see "
+ "us\n", dev->name);
+ break;
+ case E_INTERN_ERR:
+ printk(KERN_ERR "%s: HIPPI Internal NIC error\n",
+ dev->name);
+ writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
+ ®s->HostCtrl);
+ wmb();
+ break;
+ case E_HOST_ERR:
+ printk(KERN_ERR "%s: Host software error\n",
+ dev->name);
+ writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
+ ®s->HostCtrl);
+ wmb();
+ break;
+ /*
+ * TX events.
+ */
+ case E_CON_REJ:
+ printk(KERN_WARNING "%s: Connection rejected\n",
+ dev->name);
+ dev->stats.tx_aborted_errors++;
+ break;
+ case E_CON_TMOUT:
+ printk(KERN_WARNING "%s: Connection timeout\n",
+ dev->name);
+ break;
+ case E_DISC_ERR:
+ printk(KERN_WARNING "%s: HIPPI disconnect error\n",
+ dev->name);
+ dev->stats.tx_aborted_errors++;
+ break;
+ case E_INT_PRTY:
+ printk(KERN_ERR "%s: HIPPI Internal Parity error\n",
+ dev->name);
+ writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
+ ®s->HostCtrl);
+ wmb();
+ break;
+ case E_TX_IDLE:
+ printk(KERN_WARNING "%s: Transmitter idle\n",
+ dev->name);
+ break;
+ case E_TX_LINK_DROP:
+ printk(KERN_WARNING "%s: Link lost during transmit\n",
+ dev->name);
+ dev->stats.tx_aborted_errors++;
+ writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
+ ®s->HostCtrl);
+ wmb();
+ break;
+ case E_TX_INV_RNG:
+ printk(KERN_ERR "%s: Invalid send ring block\n",
+ dev->name);
+ writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
+ ®s->HostCtrl);
+ wmb();
+ break;
+ case E_TX_INV_BUF:
+ printk(KERN_ERR "%s: Invalid send buffer address\n",
+ dev->name);
+ writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
+ ®s->HostCtrl);
+ wmb();
+ break;
+ case E_TX_INV_DSC:
+ printk(KERN_ERR "%s: Invalid descriptor address\n",
+ dev->name);
+ writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
+ ®s->HostCtrl);
+ wmb();
+ break;
+ /*
+ * RX events.
+ */
+ case E_RX_RNG_OUT:
+ printk(KERN_INFO "%s: Receive ring full\n", dev->name);
+ break;
+
+ case E_RX_PAR_ERR:
+ printk(KERN_WARNING "%s: Receive parity error\n",
+ dev->name);
+ goto drop;
+ case E_RX_LLRC_ERR:
+ printk(KERN_WARNING "%s: Receive LLRC error\n",
+ dev->name);
+ goto drop;
+ case E_PKT_LN_ERR:
+ printk(KERN_WARNING "%s: Receive packet length "
+ "error\n", dev->name);
+ goto drop;
+ case E_DTA_CKSM_ERR:
+ printk(KERN_WARNING "%s: Data checksum error\n",
+ dev->name);
+ goto drop;
+ case E_SHT_BST:
+ printk(KERN_WARNING "%s: Unexpected short burst "
+ "error\n", dev->name);
+ goto drop;
+ case E_STATE_ERR:
+ printk(KERN_WARNING "%s: Recv. state transition"
+ " error\n", dev->name);
+ goto drop;
+ case E_UNEXP_DATA:
+ printk(KERN_WARNING "%s: Unexpected data error\n",
+ dev->name);
+ goto drop;
+ case E_LST_LNK_ERR:
+ printk(KERN_WARNING "%s: Link lost error\n",
+ dev->name);
+ goto drop;
+ case E_FRM_ERR:
+ printk(KERN_WARNING "%s: Framming Error\n",
+ dev->name);
+ goto drop;
+ case E_FLG_SYN_ERR:
+ printk(KERN_WARNING "%s: Flag sync. lost during "
+ "packet\n", dev->name);
+ goto drop;
+ case E_RX_INV_BUF:
+ printk(KERN_ERR "%s: Invalid receive buffer "
+ "address\n", dev->name);
+ writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
+ ®s->HostCtrl);
+ wmb();
+ break;
+ case E_RX_INV_DSC:
+ printk(KERN_ERR "%s: Invalid receive descriptor "
+ "address\n", dev->name);
+ writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
+ ®s->HostCtrl);
+ wmb();
+ break;
+ case E_RNG_BLK:
+ printk(KERN_ERR "%s: Invalid ring block\n",
+ dev->name);
+ writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
+ ®s->HostCtrl);
+ wmb();
+ break;
+ drop:
+ /* Label packet to be dropped.
+ * Actual dropping occurs in rx
+ * handling.
+ *
+ * The index of packet we get to drop is
+ * the index of the packet following
+ * the bad packet. -kbf
+ */
+ {
+ u16 index = rrpriv->evt_ring[eidx].index;
+ index = (index + (RX_RING_ENTRIES - 1)) %
+ RX_RING_ENTRIES;
+ rrpriv->rx_ring[index].mode |=
+ (PACKET_BAD | PACKET_END);
+ }
+ break;
+ default:
+ printk(KERN_WARNING "%s: Unhandled event 0x%02x\n",
+ dev->name, rrpriv->evt_ring[eidx].code);
+ }
+ eidx = (eidx + 1) % EVT_RING_ENTRIES;
+ }
+
+ rrpriv->info->evt_ctrl.pi = eidx;
+ wmb();
+ return eidx;
+}
+
+
+static void rx_int(struct net_device *dev, u32 rxlimit, u32 index)
+{
+ struct rr_private *rrpriv = netdev_priv(dev);
+ struct rr_regs __iomem *regs = rrpriv->regs;
+
+ do {
+ struct rx_desc *desc;
+ u32 pkt_len;
+
+ desc = &(rrpriv->rx_ring[index]);
+ pkt_len = desc->size;
+#if (DEBUG > 2)
+ printk("index %i, rxlimit %i\n", index, rxlimit);
+ printk("len %x, mode %x\n", pkt_len, desc->mode);
+#endif
+ if ( (rrpriv->rx_ring[index].mode & PACKET_BAD) == PACKET_BAD){
+ dev->stats.rx_dropped++;
+ goto defer;
+ }
+
+ if (pkt_len > 0){
+ struct sk_buff *skb, *rx_skb;
+
+ rx_skb = rrpriv->rx_skbuff[index];
+
+ if (pkt_len < PKT_COPY_THRESHOLD) {
+ skb = alloc_skb(pkt_len, GFP_ATOMIC);
+ if (skb == NULL){
+ printk(KERN_WARNING "%s: Unable to allocate skb (%i bytes), deferring packet\n", dev->name, pkt_len);
+ dev->stats.rx_dropped++;
+ goto defer;
+ } else {
+ pci_dma_sync_single_for_cpu(rrpriv->pci_dev,
+ desc->addr.addrlo,
+ pkt_len,
+ PCI_DMA_FROMDEVICE);
+
+ memcpy(skb_put(skb, pkt_len),
+ rx_skb->data, pkt_len);
+
+ pci_dma_sync_single_for_device(rrpriv->pci_dev,
+ desc->addr.addrlo,
+ pkt_len,
+ PCI_DMA_FROMDEVICE);
+ }
+ }else{
+ struct sk_buff *newskb;
+
+ newskb = alloc_skb(dev->mtu + HIPPI_HLEN,
+ GFP_ATOMIC);
+ if (newskb){
+ dma_addr_t addr;
+
+ pci_unmap_single(rrpriv->pci_dev,
+ desc->addr.addrlo, dev->mtu +
+ HIPPI_HLEN, PCI_DMA_FROMDEVICE);
+ skb = rx_skb;
+ skb_put(skb, pkt_len);
+ rrpriv->rx_skbuff[index] = newskb;
+ addr = pci_map_single(rrpriv->pci_dev,
+ newskb->data,
+ dev->mtu + HIPPI_HLEN,
+ PCI_DMA_FROMDEVICE);
+ set_rraddr(&desc->addr, addr);
+ } else {
+ printk("%s: Out of memory, deferring "
+ "packet\n", dev->name);
+ dev->stats.rx_dropped++;
+ goto defer;
+ }
+ }
+ skb->protocol = hippi_type_trans(skb, dev);
+
+ netif_rx(skb); /* send it up */
+
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += pkt_len;
+ }
+ defer:
+ desc->mode = 0;
+ desc->size = dev->mtu + HIPPI_HLEN;
+
+ if ((index & 7) == 7)
+ writel(index, ®s->IpRxPi);
+
+ index = (index + 1) % RX_RING_ENTRIES;
+ } while(index != rxlimit);
+
+ rrpriv->cur_rx = index;
+ wmb();
+}
+
+
+static irqreturn_t rr_interrupt(int irq, void *dev_id)
+{
+ struct rr_private *rrpriv;
+ struct rr_regs __iomem *regs;
+ struct net_device *dev = (struct net_device *)dev_id;
+ u32 prodidx, rxindex, eidx, txcsmr, rxlimit, txcon;
+
+ rrpriv = netdev_priv(dev);
+ regs = rrpriv->regs;
+
+ if (!(readl(®s->HostCtrl) & RR_INT))
+ return IRQ_NONE;
+
+ spin_lock(&rrpriv->lock);
+
+ prodidx = readl(®s->EvtPrd);
+ txcsmr = (prodidx >> 8) & 0xff;
+ rxlimit = (prodidx >> 16) & 0xff;
+ prodidx &= 0xff;
+
+#if (DEBUG > 2)
+ printk("%s: interrupt, prodidx = %i, eidx = %i\n", dev->name,
+ prodidx, rrpriv->info->evt_ctrl.pi);
+#endif
+ /*
+ * Order here is important. We must handle events
+ * before doing anything else in order to catch
+ * such things as LLRC errors, etc -kbf
+ */
+
+ eidx = rrpriv->info->evt_ctrl.pi;
+ if (prodidx != eidx)
+ eidx = rr_handle_event(dev, prodidx, eidx);
+
+ rxindex = rrpriv->cur_rx;
+ if (rxindex != rxlimit)
+ rx_int(dev, rxlimit, rxindex);
+
+ txcon = rrpriv->dirty_tx;
+ if (txcsmr != txcon) {
+ do {
+ /* Due to occational firmware TX producer/consumer out
+ * of sync. error need to check entry in ring -kbf
+ */
+ if(rrpriv->tx_skbuff[txcon]){
+ struct tx_desc *desc;
+ struct sk_buff *skb;
+
+ desc = &(rrpriv->tx_ring[txcon]);
+ skb = rrpriv->tx_skbuff[txcon];
+
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+
+ pci_unmap_single(rrpriv->pci_dev,
+ desc->addr.addrlo, skb->len,
+ PCI_DMA_TODEVICE);
+ dev_kfree_skb_irq(skb);
+
+ rrpriv->tx_skbuff[txcon] = NULL;
+ desc->size = 0;
+ set_rraddr(&rrpriv->tx_ring[txcon].addr, 0);
+ desc->mode = 0;
+ }
+ txcon = (txcon + 1) % TX_RING_ENTRIES;
+ } while (txcsmr != txcon);
+ wmb();
+
+ rrpriv->dirty_tx = txcon;
+ if (rrpriv->tx_full && rr_if_busy(dev) &&
+ (((rrpriv->info->tx_ctrl.pi + 1) % TX_RING_ENTRIES)
+ != rrpriv->dirty_tx)){
+ rrpriv->tx_full = 0;
+ netif_wake_queue(dev);
+ }
+ }
+
+ eidx |= ((txcsmr << 8) | (rxlimit << 16));
+ writel(eidx, ®s->EvtCon);
+ wmb();
+
+ spin_unlock(&rrpriv->lock);
+ return IRQ_HANDLED;
+}
+
+static inline void rr_raz_tx(struct rr_private *rrpriv,
+ struct net_device *dev)
+{
+ int i;
+
+ for (i = 0; i < TX_RING_ENTRIES; i++) {
+ struct sk_buff *skb = rrpriv->tx_skbuff[i];
+
+ if (skb) {
+ struct tx_desc *desc = &(rrpriv->tx_ring[i]);
+
+ pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
+ skb->len, PCI_DMA_TODEVICE);
+ desc->size = 0;
+ set_rraddr(&desc->addr, 0);
+ dev_kfree_skb(skb);
+ rrpriv->tx_skbuff[i] = NULL;
+ }
+ }
+}
+
+
+static inline void rr_raz_rx(struct rr_private *rrpriv,
+ struct net_device *dev)
+{
+ int i;
+
+ for (i = 0; i < RX_RING_ENTRIES; i++) {
+ struct sk_buff *skb = rrpriv->rx_skbuff[i];
+
+ if (skb) {
+ struct rx_desc *desc = &(rrpriv->rx_ring[i]);
+
+ pci_unmap_single(rrpriv->pci_dev, desc->addr.addrlo,
+ dev->mtu + HIPPI_HLEN, PCI_DMA_FROMDEVICE);
+ desc->size = 0;
+ set_rraddr(&desc->addr, 0);
+ dev_kfree_skb(skb);
+ rrpriv->rx_skbuff[i] = NULL;
+ }
+ }
+}
+
+static void rr_timer(unsigned long data)
+{
+ struct net_device *dev = (struct net_device *)data;
+ struct rr_private *rrpriv = netdev_priv(dev);
+ struct rr_regs __iomem *regs = rrpriv->regs;
+ unsigned long flags;
+
+ if (readl(®s->HostCtrl) & NIC_HALTED){
+ printk("%s: Restarting nic\n", dev->name);
+ memset(rrpriv->rx_ctrl, 0, 256 * sizeof(struct ring_ctrl));
+ memset(rrpriv->info, 0, sizeof(struct rr_info));
+ wmb();
+
+ rr_raz_tx(rrpriv, dev);
+ rr_raz_rx(rrpriv, dev);
+
+ if (rr_init1(dev)) {
+ spin_lock_irqsave(&rrpriv->lock, flags);
+ writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT,
+ ®s->HostCtrl);
+ spin_unlock_irqrestore(&rrpriv->lock, flags);
+ }
+ }
+ rrpriv->timer.expires = RUN_AT(5*HZ);
+ add_timer(&rrpriv->timer);
+}
+
+
+static int rr_open(struct net_device *dev)
+{
+ struct rr_private *rrpriv = netdev_priv(dev);
+ struct pci_dev *pdev = rrpriv->pci_dev;
+ struct rr_regs __iomem *regs;
+ int ecode = 0;
+ unsigned long flags;
+ dma_addr_t dma_addr;
+
+ regs = rrpriv->regs;
+
+ if (rrpriv->fw_rev < 0x00020000) {
+ printk(KERN_WARNING "%s: trying to configure device with "
+ "obsolete firmware\n", dev->name);
+ ecode = -EBUSY;
+ goto error;
+ }
+
+ rrpriv->rx_ctrl = pci_alloc_consistent(pdev,
+ 256 * sizeof(struct ring_ctrl),
+ &dma_addr);
+ if (!rrpriv->rx_ctrl) {
+ ecode = -ENOMEM;
+ goto error;
+ }
+ rrpriv->rx_ctrl_dma = dma_addr;
+ memset(rrpriv->rx_ctrl, 0, 256*sizeof(struct ring_ctrl));
+
+ rrpriv->info = pci_alloc_consistent(pdev, sizeof(struct rr_info),
+ &dma_addr);
+ if (!rrpriv->info) {
+ ecode = -ENOMEM;
+ goto error;
+ }
+ rrpriv->info_dma = dma_addr;
+ memset(rrpriv->info, 0, sizeof(struct rr_info));
+ wmb();
+
+ spin_lock_irqsave(&rrpriv->lock, flags);
+ writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, ®s->HostCtrl);
+ readl(®s->HostCtrl);
+ spin_unlock_irqrestore(&rrpriv->lock, flags);
+
+ if (request_irq(pdev->irq, rr_interrupt, IRQF_SHARED, dev->name, dev)) {
+ printk(KERN_WARNING "%s: Requested IRQ %d is busy\n",
+ dev->name, pdev->irq);
+ ecode = -EAGAIN;
+ goto error;
+ }
+
+ if ((ecode = rr_init1(dev)))
+ goto error;
+
+ /* Set the timer to switch to check for link beat and perhaps switch
+ to an alternate media type. */
+ init_timer(&rrpriv->timer);
+ rrpriv->timer.expires = RUN_AT(5*HZ); /* 5 sec. watchdog */
+ rrpriv->timer.data = (unsigned long)dev;
+ rrpriv->timer.function = rr_timer; /* timer handler */
+ add_timer(&rrpriv->timer);
+
+ netif_start_queue(dev);
+
+ return ecode;
+
+ error:
+ spin_lock_irqsave(&rrpriv->lock, flags);
+ writel(readl(®s->HostCtrl)|HALT_NIC|RR_CLEAR_INT, ®s->HostCtrl);
+ spin_unlock_irqrestore(&rrpriv->lock, flags);
+
+ if (rrpriv->info) {
+ pci_free_consistent(pdev, sizeof(struct rr_info), rrpriv->info,
+ rrpriv->info_dma);
+ rrpriv->info = NULL;
+ }
+ if (rrpriv->rx_ctrl) {
+ pci_free_consistent(pdev, sizeof(struct ring_ctrl),
+ rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
+ rrpriv->rx_ctrl = NULL;
+ }
+
+ netif_stop_queue(dev);
+
+ return ecode;
+}
+
+
+static void rr_dump(struct net_device *dev)
+{
+ struct rr_private *rrpriv;
+ struct rr_regs __iomem *regs;
+ u32 index, cons;
+ short i;
+ int len;
+
+ rrpriv = netdev_priv(dev);
+ regs = rrpriv->regs;
+
+ printk("%s: dumping NIC TX rings\n", dev->name);
+
+ printk("RxPrd %08x, TxPrd %02x, EvtPrd %08x, TxPi %02x, TxCtrlPi %02x\n",
+ readl(®s->RxPrd), readl(®s->TxPrd),
+ readl(®s->EvtPrd), readl(®s->TxPi),
+ rrpriv->info->tx_ctrl.pi);
+
+ printk("Error code 0x%x\n", readl(®s->Fail1));
+
+ index = (((readl(®s->EvtPrd) >> 8) & 0xff) - 1) % TX_RING_ENTRIES;
+ cons = rrpriv->dirty_tx;
+ printk("TX ring index %i, TX consumer %i\n",
+ index, cons);
+
+ if (rrpriv->tx_skbuff[index]){
+ len = min_t(int, 0x80, rrpriv->tx_skbuff[index]->len);
+ printk("skbuff for index %i is valid - dumping data (0x%x bytes - DMA len 0x%x)\n", index, len, rrpriv->tx_ring[index].size);
+ for (i = 0; i < len; i++){
+ if (!(i & 7))
+ printk("\n");
+ printk("%02x ", (unsigned char) rrpriv->tx_skbuff[index]->data[i]);
+ }
+ printk("\n");
+ }
+
+ if (rrpriv->tx_skbuff[cons]){
+ len = min_t(int, 0x80, rrpriv->tx_skbuff[cons]->len);
+ printk("skbuff for cons %i is valid - dumping data (0x%x bytes - skbuff len 0x%x)\n", cons, len, rrpriv->tx_skbuff[cons]->len);
+ printk("mode 0x%x, size 0x%x,\n phys %08Lx, skbuff-addr %08lx, truesize 0x%x\n",
+ rrpriv->tx_ring[cons].mode,
+ rrpriv->tx_ring[cons].size,
+ (unsigned long long) rrpriv->tx_ring[cons].addr.addrlo,
+ (unsigned long)rrpriv->tx_skbuff[cons]->data,
+ (unsigned int)rrpriv->tx_skbuff[cons]->truesize);
+ for (i = 0; i < len; i++){
+ if (!(i & 7))
+ printk("\n");
+ printk("%02x ", (unsigned char)rrpriv->tx_ring[cons].size);
+ }
+ printk("\n");
+ }
+
+ printk("dumping TX ring info:\n");
+ for (i = 0; i < TX_RING_ENTRIES; i++)
+ printk("mode 0x%x, size 0x%x, phys-addr %08Lx\n",
+ rrpriv->tx_ring[i].mode,
+ rrpriv->tx_ring[i].size,
+ (unsigned long long) rrpriv->tx_ring[i].addr.addrlo);
+
+}
+
+
+static int rr_close(struct net_device *dev)
+{
+ struct rr_private *rrpriv = netdev_priv(dev);
+ struct rr_regs __iomem *regs = rrpriv->regs;
+ struct pci_dev *pdev = rrpriv->pci_dev;
+ unsigned long flags;
+ u32 tmp;
+ short i;
+
+ netif_stop_queue(dev);
+
+
+ /*
+ * Lock to make sure we are not cleaning up while another CPU
+ * is handling interrupts.
+ */
+ spin_lock_irqsave(&rrpriv->lock, flags);
+
+ tmp = readl(®s->HostCtrl);
+ if (tmp & NIC_HALTED){
+ printk("%s: NIC already halted\n", dev->name);
+ rr_dump(dev);
+ }else{
+ tmp |= HALT_NIC | RR_CLEAR_INT;
+ writel(tmp, ®s->HostCtrl);
+ readl(®s->HostCtrl);
+ }
+
+ rrpriv->fw_running = 0;
+
+ del_timer_sync(&rrpriv->timer);
+
+ writel(0, ®s->TxPi);
+ writel(0, ®s->IpRxPi);
+
+ writel(0, ®s->EvtCon);
+ writel(0, ®s->EvtPrd);
+
+ for (i = 0; i < CMD_RING_ENTRIES; i++)
+ writel(0, ®s->CmdRing[i]);
+
+ rrpriv->info->tx_ctrl.entries = 0;
+ rrpriv->info->cmd_ctrl.pi = 0;
+ rrpriv->info->evt_ctrl.pi = 0;
+ rrpriv->rx_ctrl[4].entries = 0;
+
+ rr_raz_tx(rrpriv, dev);
+ rr_raz_rx(rrpriv, dev);
+
+ pci_free_consistent(pdev, 256 * sizeof(struct ring_ctrl),
+ rrpriv->rx_ctrl, rrpriv->rx_ctrl_dma);
+ rrpriv->rx_ctrl = NULL;
+
+ pci_free_consistent(pdev, sizeof(struct rr_info), rrpriv->info,
+ rrpriv->info_dma);
+ rrpriv->info = NULL;
+
+ free_irq(pdev->irq, dev);
+ spin_unlock_irqrestore(&rrpriv->lock, flags);
+
+ return 0;
+}
+
+
+static netdev_tx_t rr_start_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct rr_private *rrpriv = netdev_priv(dev);
+ struct rr_regs __iomem *regs = rrpriv->regs;
+ struct hippi_cb *hcb = (struct hippi_cb *) skb->cb;
+ struct ring_ctrl *txctrl;
+ unsigned long flags;
+ u32 index, len = skb->len;
+ u32 *ifield;
+ struct sk_buff *new_skb;
+
+ if (readl(®s->Mode) & FATAL_ERR)
+ printk("error codes Fail1 %02x, Fail2 %02x\n",
+ readl(®s->Fail1), readl(®s->Fail2));
+
+ /*
+ * We probably need to deal with tbusy here to prevent overruns.
+ */
+
+ if (skb_headroom(skb) < 8){
+ printk("incoming skb too small - reallocating\n");
+ if (!(new_skb = dev_alloc_skb(len + 8))) {
+ dev_kfree_skb(skb);
+ netif_wake_queue(dev);
+ return NETDEV_TX_OK;
+ }
+ skb_reserve(new_skb, 8);
+ skb_put(new_skb, len);
+ skb_copy_from_linear_data(skb, new_skb->data, len);
+ dev_kfree_skb(skb);
+ skb = new_skb;
+ }
+
+ ifield = (u32 *)skb_push(skb, 8);
+
+ ifield[0] = 0;
+ ifield[1] = hcb->ifield;
+
+ /*
+ * We don't need the lock before we are actually going to start
+ * fiddling with the control blocks.
+ */
+ spin_lock_irqsave(&rrpriv->lock, flags);
+
+ txctrl = &rrpriv->info->tx_ctrl;
+
+ index = txctrl->pi;
+
+ rrpriv->tx_skbuff[index] = skb;
+ set_rraddr(&rrpriv->tx_ring[index].addr, pci_map_single(
+ rrpriv->pci_dev, skb->data, len + 8, PCI_DMA_TODEVICE));
+ rrpriv->tx_ring[index].size = len + 8; /* include IFIELD */
+ rrpriv->tx_ring[index].mode = PACKET_START | PACKET_END;
+ txctrl->pi = (index + 1) % TX_RING_ENTRIES;
+ wmb();
+ writel(txctrl->pi, ®s->TxPi);
+
+ if (txctrl->pi == rrpriv->dirty_tx){
+ rrpriv->tx_full = 1;
+ netif_stop_queue(dev);
+ }
+
+ spin_unlock_irqrestore(&rrpriv->lock, flags);
+
+ return NETDEV_TX_OK;
+}
+
+
+/*
+ * Read the firmware out of the EEPROM and put it into the SRAM
+ * (or from user space - later)
+ *
+ * This operation requires the NIC to be halted and is performed with
+ * interrupts disabled and with the spinlock hold.
+ */
+static int rr_load_firmware(struct net_device *dev)
+{
+ struct rr_private *rrpriv;
+ struct rr_regs __iomem *regs;
+ size_t eptr, segptr;
+ int i, j;
+ u32 localctrl, sptr, len, tmp;
+ u32 p2len, p2size, nr_seg, revision, io, sram_size;
+
+ rrpriv = netdev_priv(dev);
+ regs = rrpriv->regs;
+
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+
+ if (!(readl(®s->HostCtrl) & NIC_HALTED)){
+ printk("%s: Trying to load firmware to a running NIC.\n",
+ dev->name);
+ return -EBUSY;
+ }
+
+ localctrl = readl(®s->LocalCtrl);
+ writel(0, ®s->LocalCtrl);
+
+ writel(0, ®s->EvtPrd);
+ writel(0, ®s->RxPrd);
+ writel(0, ®s->TxPrd);
+
+ /*
+ * First wipe the entire SRAM, otherwise we might run into all
+ * kinds of trouble ... sigh, this took almost all afternoon
+ * to track down ;-(
+ */
+ io = readl(®s->ExtIo);
+ writel(0, ®s->ExtIo);
+ sram_size = rr_read_eeprom_word(rrpriv, 8);
+
+ for (i = 200; i < sram_size / 4; i++){
+ writel(i * 4, ®s->WinBase);
+ mb();
+ writel(0, ®s->WinData);
+ mb();
+ }
+ writel(io, ®s->ExtIo);
+ mb();
+
+ eptr = rr_read_eeprom_word(rrpriv,
+ offsetof(struct eeprom, rncd_info.AddrRunCodeSegs));
+ eptr = ((eptr & 0x1fffff) >> 3);
+
+ p2len = rr_read_eeprom_word(rrpriv, 0x83*4);
+ p2len = (p2len << 2);
+ p2size = rr_read_eeprom_word(rrpriv, 0x84*4);
+ p2size = ((p2size & 0x1fffff) >> 3);
+
+ if ((eptr < p2size) || (eptr > (p2size + p2len))){
+ printk("%s: eptr is invalid\n", dev->name);
+ goto out;
+ }
+
+ revision = rr_read_eeprom_word(rrpriv,
+ offsetof(struct eeprom, manf.HeaderFmt));
+
+ if (revision != 1){
+ printk("%s: invalid firmware format (%i)\n",
+ dev->name, revision);
+ goto out;
+ }
+
+ nr_seg = rr_read_eeprom_word(rrpriv, eptr);
+ eptr +=4;
+#if (DEBUG > 1)
+ printk("%s: nr_seg %i\n", dev->name, nr_seg);
+#endif
+
+ for (i = 0; i < nr_seg; i++){
+ sptr = rr_read_eeprom_word(rrpriv, eptr);
+ eptr += 4;
+ len = rr_read_eeprom_word(rrpriv, eptr);
+ eptr += 4;
+ segptr = rr_read_eeprom_word(rrpriv, eptr);
+ segptr = ((segptr & 0x1fffff) >> 3);
+ eptr += 4;
+#if (DEBUG > 1)
+ printk("%s: segment %i, sram address %06x, length %04x, segptr %06x\n",
+ dev->name, i, sptr, len, segptr);
+#endif
+ for (j = 0; j < len; j++){
+ tmp = rr_read_eeprom_word(rrpriv, segptr);
+ writel(sptr, ®s->WinBase);
+ mb();
+ writel(tmp, ®s->WinData);
+ mb();
+ segptr += 4;
+ sptr += 4;
+ }
+ }
+
+out:
+ writel(localctrl, ®s->LocalCtrl);
+ mb();
+ return 0;
+}
+
+
+static int rr_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+ struct rr_private *rrpriv;
+ unsigned char *image, *oldimage;
+ unsigned long flags;
+ unsigned int i;
+ int error = -EOPNOTSUPP;
+
+ rrpriv = netdev_priv(dev);
+
+ switch(cmd){
+ case SIOCRRGFW:
+ if (!capable(CAP_SYS_RAWIO)){
+ return -EPERM;
+ }
+
+ image = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
+ if (!image)
+ return -ENOMEM;
+
+ if (rrpriv->fw_running){
+ printk("%s: Firmware already running\n", dev->name);
+ error = -EPERM;
+ goto gf_out;
+ }
+
+ spin_lock_irqsave(&rrpriv->lock, flags);
+ i = rr_read_eeprom(rrpriv, 0, image, EEPROM_BYTES);
+ spin_unlock_irqrestore(&rrpriv->lock, flags);
+ if (i != EEPROM_BYTES){
+ printk(KERN_ERR "%s: Error reading EEPROM\n",
+ dev->name);
+ error = -EFAULT;
+ goto gf_out;
+ }
+ error = copy_to_user(rq->ifr_data, image, EEPROM_BYTES);
+ if (error)
+ error = -EFAULT;
+ gf_out:
+ kfree(image);
+ return error;
+
+ case SIOCRRPFW:
+ if (!capable(CAP_SYS_RAWIO)){
+ return -EPERM;
+ }
+
+ image = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
+ oldimage = kmalloc(EEPROM_WORDS * sizeof(u32), GFP_KERNEL);
+ if (!image || !oldimage) {
+ error = -ENOMEM;
+ goto wf_out;
+ }
+
+ error = copy_from_user(image, rq->ifr_data, EEPROM_BYTES);
+ if (error) {
+ error = -EFAULT;
+ goto wf_out;
+ }
+
+ if (rrpriv->fw_running){
+ printk("%s: Firmware already running\n", dev->name);
+ error = -EPERM;
+ goto wf_out;
+ }
+
+ printk("%s: Updating EEPROM firmware\n", dev->name);
+
+ spin_lock_irqsave(&rrpriv->lock, flags);
+ error = write_eeprom(rrpriv, 0, image, EEPROM_BYTES);
+ if (error)
+ printk(KERN_ERR "%s: Error writing EEPROM\n",
+ dev->name);
+
+ i = rr_read_eeprom(rrpriv, 0, oldimage, EEPROM_BYTES);
+ spin_unlock_irqrestore(&rrpriv->lock, flags);
+
+ if (i != EEPROM_BYTES)
+ printk(KERN_ERR "%s: Error reading back EEPROM "
+ "image\n", dev->name);
+
+ error = memcmp(image, oldimage, EEPROM_BYTES);
+ if (error){
+ printk(KERN_ERR "%s: Error verifying EEPROM image\n",
+ dev->name);
+ error = -EFAULT;
+ }
+ wf_out:
+ kfree(oldimage);
+ kfree(image);
+ return error;
+
+ case SIOCRRID:
+ return put_user(0x52523032, (int __user *)rq->ifr_data);
+ default:
+ return error;
+ }
+}
+
+static const struct pci_device_id rr_pci_tbl[] = {
+ { PCI_VENDOR_ID_ESSENTIAL, PCI_DEVICE_ID_ESSENTIAL_ROADRUNNER,
+ PCI_ANY_ID, PCI_ANY_ID, },
+ { 0,}
+};
+MODULE_DEVICE_TABLE(pci, rr_pci_tbl);
+
+static struct pci_driver rr_driver = {
+ .name = "rrunner",
+ .id_table = rr_pci_tbl,
+ .probe = rr_init_one,
+ .remove = rr_remove_one,
+};
+
+module_pci_driver(rr_driver);
Code Review / kvmfornfv.git / blobdiff