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authorTejun Heo <htejun@gmail.com>2007-04-17 23:44:07 +0900
committerJeff Garzik <jeff@garzik.org>2007-04-28 14:16:03 -0400
commit21b0ad4fb8306ac2bf5a249ffc978b1b8924c7d0 (patch)
tree9f82cc6a4bca146ce1021f0825cc12f18f9063b9 /drivers/ata/libata-sff.c
parentd491b27b1959565671e2c05dff09b5f535a854ce (diff)
downloadlinux-21b0ad4fb8306ac2bf5a249ffc978b1b8924c7d0.tar.bz2
libata: add init helpers including ata_pci_prepare_native_host()
These will be used to convert LLDs to new init model. * Add irq_handler field to port_info. In new init model, requesting IRQ is LLD's responsibility and libata doesn't need to know about irq_handler. Most LLDs can simply register their irq_handler but some need different irq_handler depending on specific chip. The added port_info->irq_handler field can be used by LLDs to select the matching IRQ handler in such cases. * Add ata_dummy_port_info. * Implement ata_pci_prepare_native_host(), a helper to alloc ATA host, acquire all resources and init the host in one go. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata/libata-sff.c')
-rw-r--r--drivers/ata/libata-sff.c67
1 files changed, 65 insertions, 2 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index d551fa1cb104..142120cab874 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -663,13 +663,12 @@ static int ata_pci_init_bmdma(struct ata_host *host)
for (i = 0; i < 2; i++) {
struct ata_port *ap = host->ports[i];
- struct ata_ioports *ioaddr = &ap->ioaddr;
void __iomem *bmdma = host->iomap[4] + 8 * i;
if (ata_port_is_dummy(ap))
continue;
- ioaddr->bmdma_addr = bmdma;
+ ap->ioaddr.bmdma_addr = bmdma;
if ((!(ap->flags & ATA_FLAG_IGN_SIMPLEX)) &&
(ioread8(bmdma + 2) & 0x80))
host->flags |= ATA_HOST_SIMPLEX;
@@ -742,6 +741,70 @@ int ata_pci_init_native_host(struct ata_host *host, unsigned int port_mask)
return 0;
}
+/**
+ * ata_pci_prepare_native_host - helper to prepare native PCI ATA host
+ * @pdev: target PCI device
+ * @ppi: array of port_info
+ * @n_ports: number of ports to allocate
+ * @r_host: out argument for the initialized ATA host
+ *
+ * Helper to allocate ATA host for @pdev, acquire all native PCI
+ * resources and initialize it accordingly in one go.
+ *
+ * LOCKING:
+ * Inherited from calling layer (may sleep).
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise.
+ */
+int ata_pci_prepare_native_host(struct pci_dev *pdev,
+ const struct ata_port_info * const * ppi,
+ int n_ports, struct ata_host **r_host)
+{
+ struct ata_host *host;
+ unsigned int port_mask;
+ int rc;
+
+ if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL))
+ return -ENOMEM;
+
+ host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2);
+ if (!host) {
+ dev_printk(KERN_ERR, &pdev->dev,
+ "failed to allocate ATA host\n");
+ rc = -ENOMEM;
+ goto err_out;
+ }
+
+ port_mask = ATA_PORT_PRIMARY;
+ if (n_ports > 1)
+ port_mask |= ATA_PORT_SECONDARY;
+
+ rc = ata_pci_init_native_host(host, port_mask);
+ if (rc)
+ goto err_out;
+
+ /* init DMA related stuff */
+ rc = ata_pci_init_bmdma(host);
+ if (rc)
+ goto err_bmdma;
+
+ devres_remove_group(&pdev->dev, NULL);
+ *r_host = host;
+ return 0;
+
+ err_bmdma:
+ /* This is necessary because PCI and iomap resources are
+ * merged and releasing the top group won't release the
+ * acquired resources if some of those have been acquired
+ * before entering this function.
+ */
+ pcim_iounmap_regions(pdev, 0xf);
+ err_out:
+ devres_release_group(&pdev->dev, NULL);
+ return rc;
+}
+
struct ata_legacy_devres {
unsigned int mask;
unsigned long cmd_port[2];