diff options
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/ahci.c | 73 |
1 files changed, 63 insertions, 10 deletions
diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c index da5bd33d982d..5e2a1e8b9039 100644 --- a/drivers/scsi/ahci.c +++ b/drivers/scsi/ahci.c @@ -152,6 +152,7 @@ struct ahci_sg { struct ahci_host_priv { unsigned long flags; + unsigned int have_msi; /* is PCI MSI enabled? */ u32 cap; /* cache of HOST_CAP register */ u32 port_map; /* cache of HOST_PORTS_IMPL reg */ }; @@ -182,6 +183,7 @@ 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, @@ -271,7 +273,7 @@ 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, }; @@ -876,15 +878,19 @@ 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) @@ -966,7 +972,7 @@ 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"); @@ -984,12 +990,17 @@ 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)); @@ -1022,6 +1033,8 @@ 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; + hpriv->have_msi = have_msi; + /* initialize adapter */ rc = ahci_host_init(probe_ent); if (rc) @@ -1041,7 +1054,11 @@ 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) @@ -1049,6 +1066,42 @@ 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->have_msi; + free_irq(host_set->irq, host_set); + host_set->ops->host_stop(host_set); + iounmap(host_set->mmio_base); + + for (i = 0; i < host_set->n_ports; i++) { + ap = host_set->ports[i]; + + ata_scsi_release(ap->host); + scsi_host_put(ap->host); + } + + if (have_msi) + pci_disable_msi(pdev); + else + pci_intx(pdev, 0); + pci_release_regions(pdev); + kfree(host_set); + pci_disable_device(pdev); + dev_set_drvdata(dev, NULL); +} static int __init ahci_init(void) { |