aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux
diff options
context:
space:
mode:
authorTejun Heo <htejun@gmail.com>2007-05-04 06:43:58 -0400
committerJeff Garzik <jeff@garzik.org>2007-05-11 18:09:18 -0400
commit1626aeb881236c8cb022b5e4ca594146a951d669 (patch)
tree30f3457e4b5d76e62ee192fcc0d52b0ee8a829df /include/linux
parent920a4b1038e442700a1cfac77ea7e20bd615a2c3 (diff)
libata: clean up SFF init mess
The intention of using port_mask in SFF init helpers was to eventually support exoctic configurations such as combination of legacy and native port on the same controller. This never became actually necessary and the related code always has been subtly broken one way or the other. Now that new init model is in place, there is no reason to make common helpers capable of handling all corner cases. Exotic cases can simply dealt within LLDs as necessary. This patch removes port_mask handling in SFF init helpers. SFF init helpers don't take n_ports argument and interpret it into port_mask anymore. All information is carried via port_info. n_ports argument is dropped and always two ports are allocated. LLD can tell SFF to skip certain port by marking it dummy. Note that SFF code has been treating unuvailable ports this way for a long time until recent breakage fix from Linus and is consistent with how other drivers handle with unavailable ports. This fixes 1-port legacy host handling still broken after the recent native mode fix and simplifies SFF init logic. The following changes are made... * ata_pci_init_native_host() and ata_init_legacy_host() both now try to initialized whatever they can and mark failed ports dummy. They return 0 if any port is successfully initialized. * ata_pci_prepare_native_host() and ata_pci_init_one() now doesn't take n_ports argument. All info should be specified via port_info array. Always two ports are allocated. * ata_pci_init_bmdma() exported to be used by LLDs in exotic cases. * port_info handling in all LLDs are standardized - all port_info arrays are const stack variable named ppi. Unless the second port is different from the first, its port_info is specified as NULL (tells libata that it's identical to the last non-NULL port_info). * pata_hpt37x/hpt3x2n: don't modify static variable directly. Make an on-stack copy instead as ata_piix does. * pata_uli: It has 4 ports instead of 2. Don't use ata_pci_prepare_native_host(). Allocate the host explicitly and use init helpers. It's simple enough. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/libata.h14
1 files changed, 5 insertions, 9 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 8a7cc13c8516..95b74ba7dbf4 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -253,10 +253,6 @@ enum {
253 ATA_DMA_PAD_SZ = 4, 253 ATA_DMA_PAD_SZ = 4,
254 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE, 254 ATA_DMA_PAD_BUF_SZ = ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
255 255
256 /* masks for port functions */
257 ATA_PORT_PRIMARY = (1 << 0),
258 ATA_PORT_SECONDARY = (1 << 1),
259
260 /* ering size */ 256 /* ering size */
261 ATA_ERING_SIZE = 32, 257 ATA_ERING_SIZE = 32,
262 258
@@ -688,8 +684,8 @@ extern void ata_std_postreset(struct ata_port *ap, unsigned int *classes);
688extern void ata_port_disable(struct ata_port *); 684extern void ata_port_disable(struct ata_port *);
689extern void ata_std_ports(struct ata_ioports *ioaddr); 685extern void ata_std_ports(struct ata_ioports *ioaddr);
690#ifdef CONFIG_PCI 686#ifdef CONFIG_PCI
691extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, 687extern int ata_pci_init_one (struct pci_dev *pdev,
692 unsigned int n_ports); 688 const struct ata_port_info * const * ppi);
693extern void ata_pci_remove_one (struct pci_dev *pdev); 689extern void ata_pci_remove_one (struct pci_dev *pdev);
694#ifdef CONFIG_PM 690#ifdef CONFIG_PM
695extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg); 691extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
@@ -854,11 +850,11 @@ struct pci_bits {
854 unsigned long val; 850 unsigned long val;
855}; 851};
856 852
857extern int ata_pci_init_native_host(struct ata_host *host, 853extern int ata_pci_init_native_host(struct ata_host *host);
858 unsigned int port_mask); 854extern int ata_pci_init_bmdma(struct ata_host *host);
859extern int ata_pci_prepare_native_host(struct pci_dev *pdev, 855extern int ata_pci_prepare_native_host(struct pci_dev *pdev,
860 const struct ata_port_info * const * ppi, 856 const struct ata_port_info * const * ppi,
861 int n_ports, struct ata_host **r_host); 857 struct ata_host **r_host);
862extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); 858extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
863extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long); 859extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
864#endif /* CONFIG_PCI */ 860#endif /* CONFIG_PCI */