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authorTejun Heo <tj@kernel.org>2010-05-19 22:10:24 +0200
committerJeff Garzik <jgarzik@redhat.com>2010-05-25 19:41:12 -0400
commit9a7780c9acb821fe1c2b6fc53f74cc2556ff5364 (patch)
tree9590f79a1a0631120322ecfa8a86f610859d7aec /drivers/ata/libata-sff.c
parentd6b0de8c28ef32d081cfee938e443ce2a2429cfe (diff)
libata-sff: make BMDMA optional
Make BMDMA optional depending on new config variable CONFIG_ATA_BMDMA. In Kconfig, drivers are grouped into five groups - non-SFF native, SFF w/ custom DMA interface, SFF w/ BMDMA, PIO-only SFF, and generic fallback / legacy ones. Kconfig and Makefile are reorganized according to the groups and ordered alphabetically inside each group. ata_ioports.bmdma_addr and ata_port.bmdma_prd[_dma] are put into CONFIG_ATA_BMDMA, as are all bmdma related ops, variables and functions. This increase the binary size slightly when BMDMA is enabled but on both native-only and PIO-only configurations the size is slightly reduced. Either way, the size difference is insignificant. This change is more meaningful to signify the separation between SFF and BMDMA and as a tool to verify the separation. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/libata-sff.c')
-rw-r--r--drivers/ata/libata-sff.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index c29f1468e164..efa4a18cfb9d 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -798,11 +798,15 @@ static void atapi_send_cdb(struct ata_port *ap, struct ata_queued_cmd *qc)
case ATAPI_PROT_NODATA:
ap->hsm_task_state = HSM_ST_LAST;
break;
+#ifdef CONFIG_ATA_BMDMA
case ATAPI_PROT_DMA:
ap->hsm_task_state = HSM_ST_LAST;
/* initiate bmdma */
ap->ops->bmdma_start(qc);
break;
+#endif /* CONFIG_ATA_BMDMA */
+ default:
+ BUG();
}
}
@@ -2535,6 +2539,12 @@ EXPORT_SYMBOL_GPL(ata_pci_sff_init_one);
#endif /* CONFIG_PCI */
+/*
+ * BMDMA support
+ */
+
+#ifdef CONFIG_ATA_BMDMA
+
const struct ata_port_operations ata_bmdma_port_ops = {
.inherits = &ata_sff_port_ops,
@@ -3287,6 +3297,7 @@ int ata_pci_bmdma_init_one(struct pci_dev *pdev,
EXPORT_SYMBOL_GPL(ata_pci_bmdma_init_one);
#endif /* CONFIG_PCI */
+#endif /* CONFIG_ATA_BMDMA */
/**
* ata_sff_port_init - Initialize SFF/BMDMA ATA port