diff options
author | Tejun Heo <htejun@gmail.com> | 2007-04-17 14:44:07 (GMT) |
---|---|---|
committer | Jeff Garzik <jeff@garzik.org> | 2007-04-28 18:16:03 (GMT) |
commit | 21b0ad4fb8306ac2bf5a249ffc978b1b8924c7d0 (patch) | |
tree | 9f82cc6a4bca146ce1021f0825cc12f18f9063b9 /drivers/ata/libata-sff.c | |
parent | d491b27b1959565671e2c05dff09b5f535a854ce (diff) | |
download | linux-fsl-qoriq-21b0ad4fb8306ac2bf5a249ffc978b1b8924c7d0.tar.xz |
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.c | 67 |
1 files changed, 65 insertions, 2 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index d551fa1..142120c 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]; |