Automatic merge of /spare/repo/libata-dev branch ahci-msi

1 files changed, 67 insertions, 13 deletions

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index fc5263c6b102..1799233dcf9f 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -39,7 +39,7 @@
 #include <asm/io.h>
 
 #define DRV_NAME        "ahci"
-#define DRV_VERSION     "1.00"
+#define DRV_VERSION     "1.01"
 
 
 enum {
@@ -134,6 +134,9 @@ enum {
         PORT_CMD_ICC_ACTIVE     = (0x1 << 28), /* Put i/f in active state */
         PORT_CMD_ICC_PARTIAL    = (0x2 << 28), /* Put i/f in partial state */
         PORT_CMD_ICC_SLUMBER    = (0x6 << 28), /* Put i/f in slumber state */
+
+        /* hpriv->flags bits */
+        AHCI_FLAG_MSI           = (1 << 0),
 };
 
 struct ahci_cmd_hdr {
@@ -183,6 +186,7 @@ static void ahci_qc_prep(struct ata_queued_cmd *qc);
 static u8 ahci_check_status(struct ata_port *ap);
 static u8 ahci_check_err(struct ata_port *ap);
 static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
+static void ahci_remove_one (struct pci_dev *pdev);
 
 static Scsi_Host_Template ahci_sht = {
         .module                 = THIS_MODULE,
@@ -272,7 +276,7 @@ static struct pci_driver ahci_pci_driver = {
         .name                   = DRV_NAME,
         .id_table               = ahci_pci_tbl,
         .probe                  = ahci_init_one,
-        .remove                 = ata_pci_remove_one,
+        .remove                 = ahci_remove_one,
 };
 
 
@@ -795,8 +799,6 @@ static int ahci_host_init(struct ata_probe_ent *probe_ent)
                                 return rc;
                         }
                 }
-
-                hpriv->flags |= HOST_CAP_64;
         } else {
                 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
                 if (rc) {
@@ -879,15 +881,19 @@ static int ahci_host_init(struct ata_probe_ent *probe_ent)
 }
 
 /* move to PCI layer, integrate w/ MSI stuff */
-static void pci_enable_intx(struct pci_dev *pdev)
+static void pci_intx(struct pci_dev *pdev, int enable)
 {
-        u16 pci_command;
+        u16 pci_command, new;
 
         pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
-        if (pci_command & PCI_COMMAND_INTX_DISABLE) {
-                pci_command &= ~PCI_COMMAND_INTX_DISABLE;
+
+        if (enable)
+                new = pci_command & ~PCI_COMMAND_INTX_DISABLE;
+        else
+                new = pci_command | PCI_COMMAND_INTX_DISABLE;
+
+        if (new != pci_command)
                 pci_write_config_word(pdev, PCI_COMMAND, pci_command);
-        }
 }
 
 static void ahci_print_info(struct ata_probe_ent *probe_ent)
@@ -969,7 +975,7 @@ static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
         unsigned long base;
         void *mmio_base;
         unsigned int board_idx = (unsigned int) ent->driver_data;
-        int pci_dev_busy = 0;
+        int have_msi, pci_dev_busy = 0;
         int rc;
 
         VPRINTK("ENTER\n");
@@ -987,12 +993,17 @@ static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
                 goto err_out;
         }
 
-        pci_enable_intx(pdev);
+        if (pci_enable_msi(pdev) == 0)
+                have_msi = 1;
+        else {
+                pci_intx(pdev, 1);
+                have_msi = 0;
+        }
 
         probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
         if (probe_ent == NULL) {
                 rc = -ENOMEM;
-                goto err_out_regions;
+                goto err_out_msi;
         }
 
         memset(probe_ent, 0, sizeof(*probe_ent));
@@ -1025,6 +1036,9 @@ static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
         probe_ent->mmio_base = mmio_base;
         probe_ent->private_data = hpriv;
 
+        if (have_msi)
+                hpriv->flags |= AHCI_FLAG_MSI;
+
         /* initialize adapter */
         rc = ahci_host_init(probe_ent);
         if (rc)
@@ -1044,7 +1058,11 @@ err_out_iounmap:
         iounmap(mmio_base);
 err_out_free_ent:
         kfree(probe_ent);
-err_out_regions:
+err_out_msi:
+        if (have_msi)
+                pci_disable_msi(pdev);
+        else
+                pci_intx(pdev, 0);
         pci_release_regions(pdev);
 err_out:
         if (!pci_dev_busy)
@@ -1052,6 +1070,42 @@ err_out:
         return rc;
 }
 
+static void ahci_remove_one (struct pci_dev *pdev)
+{
+        struct device *dev = pci_dev_to_dev(pdev);
+        struct ata_host_set *host_set = dev_get_drvdata(dev);
+        struct ahci_host_priv *hpriv = host_set->private_data;
+        struct ata_port *ap;
+        unsigned int i;
+        int have_msi;
+
+        for (i = 0; i < host_set->n_ports; i++) {
+                ap = host_set->ports[i];
+
+                scsi_remove_host(ap->host);
+        }
+
+        have_msi = hpriv->flags & AHCI_FLAG_MSI;
+        free_irq(host_set->irq, host_set);
+
+        for (i = 0; i < host_set->n_ports; i++) {
+                ap = host_set->ports[i];
+
+                ata_scsi_release(ap->host);
+                scsi_host_put(ap->host);
+        }
+
+        host_set->ops->host_stop(host_set);
+        kfree(host_set);
+
+        if (have_msi)
+                pci_disable_msi(pdev);
+        else
+                pci_intx(pdev, 0);
+        pci_release_regions(pdev);
+        pci_disable_device(pdev);
+        dev_set_drvdata(dev, NULL);
+}
 
 static int __init ahci_init(void)
 {