Merge branch 'work'

[linux-2.6] / drivers / scsi / ahci.c

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index 7b0640bc0079f2d1aab13204ba01da99e1e2b315..d113290b5fc01ccf977902881eb60b2f699c4bc1 100644 (file)
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -48,7 +48,7 @@
 #include <asm/io.h>
 
 #define DRV_NAME       "ahci"
-#define DRV_VERSION    "1.01"
+#define DRV_VERSION    "1.2"
 
 
 enum {
@@ -134,6 +134,7 @@ enum {
                                  PORT_IRQ_D2H_REG_FIS,
 
        /* PORT_CMD bits */
+       PORT_CMD_ATAPI          = (1 << 24), /* Device is ATAPI */
        PORT_CMD_LIST_ON        = (1 << 15), /* cmd list DMA engine running */
        PORT_CMD_FIS_ON         = (1 << 14), /* FIS DMA engine running */
        PORT_CMD_FIS_RX         = (1 << 4), /* Enable FIS receive DMA engine */
@@ -213,7 +214,6 @@ static struct scsi_host_template ahci_sht = {
        .dma_boundary           = AHCI_DMA_BOUNDARY,
        .slave_configure        = ata_scsi_slave_config,
        .bios_param             = ata_std_bios_param,
-       .ordered_flush          = 1,
 };
 
 static const struct ata_port_operations ahci_ops = {
@@ -242,7 +242,7 @@ static const struct ata_port_operations ahci_ops = {
        .port_stop              = ahci_port_stop,
 };
 
-static struct ata_port_info ahci_port_info[] = {
+static const struct ata_port_info ahci_port_info[] = {
        /* board_ahci */
        {
                .sht            = &ahci_sht,
@@ -441,7 +441,7 @@ static void ahci_phy_reset(struct ata_port *ap)
        void __iomem *port_mmio = (void __iomem *) ap->ioaddr.cmd_addr;
        struct ata_taskfile tf;
        struct ata_device *dev = &ap->device[0];
-       u32 tmp;
+       u32 new_tmp, tmp;
 
        __sata_phy_reset(ap);
 
@@ -455,8 +455,21 @@ static void ahci_phy_reset(struct ata_port *ap)
        tf.nsect        = (tmp)         & 0xff;
 
        dev->class = ata_dev_classify(&tf);
-       if (!ata_dev_present(dev))
+       if (!ata_dev_present(dev)) {
                ata_port_disable(ap);
+               return;
+       }
+
+       /* Make sure port's ATAPI bit is set appropriately */
+       new_tmp = tmp = readl(port_mmio + PORT_CMD);
+       if (dev->class == ATA_DEV_ATAPI)
+               new_tmp |= PORT_CMD_ATAPI;
+       else
+               new_tmp &= ~PORT_CMD_ATAPI;
+       if (new_tmp != tmp) {
+               writel(new_tmp, port_mmio + PORT_CMD);
+               readl(port_mmio + PORT_CMD); /* flush */
+       }
 }
 
 static u8 ahci_check_status(struct ata_port *ap)
@@ -544,13 +557,26 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc)
        pp->cmd_slot[0].opts |= cpu_to_le32(n_elem << 16);
 }
 
-static void ahci_intr_error(struct ata_port *ap, u32 irq_stat)
+static void ahci_restart_port(struct ata_port *ap, u32 irq_stat)
 {
        void __iomem *mmio = ap->host_set->mmio_base;
        void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
        u32 tmp;
        int work;
 
+       if ((ap->device[0].class != ATA_DEV_ATAPI) ||
+           ((irq_stat & PORT_IRQ_TF_ERR) == 0))
+               printk(KERN_WARNING "ata%u: port reset, "
+                      "p_is %x is %x pis %x cmd %x tf %x ss %x se %x\n",
+                       ap->id,
+                       irq_stat,
+                       readl(mmio + HOST_IRQ_STAT),
+                       readl(port_mmio + PORT_IRQ_STAT),
+                       readl(port_mmio + PORT_CMD),
+                       readl(port_mmio + PORT_TFDATA),
+                       readl(port_mmio + PORT_SCR_STAT),
+                       readl(port_mmio + PORT_SCR_ERR));
+
        /* stop DMA */
        tmp = readl(port_mmio + PORT_CMD);
        tmp &= ~PORT_CMD_START;
@@ -588,8 +614,6 @@ static void ahci_intr_error(struct ata_port *ap, u32 irq_stat)
        tmp |= PORT_CMD_START;
        writel(tmp, port_mmio + PORT_CMD);
        readl(port_mmio + PORT_CMD); /* flush */
-
-       printk(KERN_WARNING "ata%u: error occurred, port reset\n", ap->id);
 }
 
 static void ahci_eng_timeout(struct ata_port *ap)
@@ -600,17 +624,17 @@ static void ahci_eng_timeout(struct ata_port *ap)
        struct ata_queued_cmd *qc;
        unsigned long flags;
 
-       DPRINTK("ENTER\n");
+       printk(KERN_WARNING "ata%u: handling error/timeout\n", ap->id);
 
        spin_lock_irqsave(&host_set->lock, flags);
 
-       ahci_intr_error(ap, readl(port_mmio + PORT_IRQ_STAT));
-
        qc = ata_qc_from_tag(ap, ap->active_tag);
        if (!qc) {
                printk(KERN_ERR "ata%u: BUG: timeout without command\n",
                       ap->id);
        } else {
+               ahci_restart_port(ap, readl(port_mmio + PORT_IRQ_STAT));
+
                /* hack alert!  We cannot use the supplied completion
                 * function from inside the ->eh_strategy_handler() thread.
                 * libata is the only user of ->eh_strategy_handler() in
@@ -618,7 +642,8 @@ static void ahci_eng_timeout(struct ata_port *ap)
                 * not being called from the SCSI EH.
                 */
                qc->scsidone = scsi_finish_command;
-               ata_qc_complete(qc, AC_ERR_OTHER);
+               qc->err_mask |= AC_ERR_OTHER;
+               ata_qc_complete(qc);
        }
 
        spin_unlock_irqrestore(&host_set->lock, flags);
@@ -639,15 +664,28 @@ static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc)
        ci = readl(port_mmio + PORT_CMD_ISSUE);
        if (likely((ci & 0x1) == 0)) {
                if (qc) {
-                       ata_qc_complete(qc, 0);
+                       assert(qc->err_mask == 0);
+                       ata_qc_complete(qc);
                        qc = NULL;
                }
        }
 
        if (status & PORT_IRQ_FATAL) {
-               ahci_intr_error(ap, status);
-               if (qc)
-                       ata_qc_complete(qc, AC_ERR_OTHER);
+               unsigned int err_mask;
+               if (status & PORT_IRQ_TF_ERR)
+                       err_mask = AC_ERR_DEV;
+               else if (status & PORT_IRQ_IF_ERR)
+                       err_mask = AC_ERR_ATA_BUS;
+               else
+                       err_mask = AC_ERR_HOST_BUS;
+
+               /* command processing has stopped due to error; restart */
+               ahci_restart_port(ap, status);
+
+               if (qc) {
+                       qc->err_mask |= AC_ERR_OTHER;
+                       ata_qc_complete(qc);
+               }
        }
 
        return 1;