From 9a7780c9acb821fe1c2b6fc53f74cc2556ff5364 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 19 May 2010 22:10:24 +0200 Subject: 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 Signed-off-by: Jeff Garzik --- include/linux/libata.h | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) (limited to 'include/linux/libata.h') diff --git a/include/linux/libata.h b/include/linux/libata.h index fe2be88..4c5eca4 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -513,7 +513,9 @@ struct ata_ioports { void __iomem *command_addr; void __iomem *altstatus_addr; void __iomem *ctl_addr; +#ifdef CONFIG_ATA_BMDMA void __iomem *bmdma_addr; +#endif /* CONFIG_ATA_BMDMA */ void __iomem *scr_addr; }; #endif /* CONFIG_ATA_SFF */ @@ -721,8 +723,10 @@ struct ata_port { u8 ctl; /* cache of ATA control register */ u8 last_ctl; /* Cache last written value */ struct delayed_work sff_pio_task; +#ifdef CONFIG_ATA_BMDMA struct ata_bmdma_prd *bmdma_prd; /* BMDMA SG list */ dma_addr_t bmdma_prd_dma; /* and its DMA mapping */ +#endif /* CONFIG_ATA_BMDMA */ #endif /* CONFIG_ATA_SFF */ unsigned int pio_mask; @@ -856,10 +860,12 @@ struct ata_port_operations { void (*sff_irq_clear)(struct ata_port *); void (*sff_drain_fifo)(struct ata_queued_cmd *qc); +#ifdef CONFIG_ATA_BMDMA void (*bmdma_setup)(struct ata_queued_cmd *qc); void (*bmdma_start)(struct ata_queued_cmd *qc); void (*bmdma_stop)(struct ata_queued_cmd *qc); u8 (*bmdma_status)(struct ata_port *ap); +#endif /* CONFIG_ATA_BMDMA */ #endif /* CONFIG_ATA_SFF */ ssize_t (*em_show)(struct ata_port *ap, char *buf); @@ -1555,7 +1561,6 @@ extern void sata_pmp_error_handler(struct ata_port *ap); #ifdef CONFIG_ATA_SFF extern const struct ata_port_operations ata_sff_port_ops; -extern const struct ata_port_operations ata_bmdma_port_ops; extern const struct ata_port_operations ata_bmdma32_port_ops; /* PIO only, sg_tablesize and dma_boundary limits can be removed */ @@ -1564,11 +1569,6 @@ extern const struct ata_port_operations ata_bmdma32_port_ops; .sg_tablesize = LIBATA_MAX_PRD, \ .dma_boundary = ATA_DMA_BOUNDARY -#define ATA_BMDMA_SHT(drv_name) \ - ATA_BASE_SHT(drv_name), \ - .sg_tablesize = LIBATA_MAX_PRD, \ - .dma_boundary = ATA_DMA_BOUNDARY - extern void ata_sff_dev_select(struct ata_port *ap, unsigned int device); extern u8 ata_sff_check_status(struct ata_port *ap); extern void ata_sff_pause(struct ata_port *ap); @@ -1625,6 +1625,15 @@ extern int ata_pci_sff_init_one(struct pci_dev *pdev, struct scsi_host_template *sht, void *host_priv, int hflags); #endif /* CONFIG_PCI */ +#ifdef CONFIG_ATA_BMDMA + +extern const struct ata_port_operations ata_bmdma_port_ops; + +#define ATA_BMDMA_SHT(drv_name) \ + ATA_BASE_SHT(drv_name), \ + .sg_tablesize = LIBATA_MAX_PRD, \ + .dma_boundary = ATA_DMA_BOUNDARY + extern void ata_bmdma_qc_prep(struct ata_queued_cmd *qc); extern unsigned int ata_bmdma_qc_issue(struct ata_queued_cmd *qc); extern void ata_bmdma_dumb_qc_prep(struct ata_queued_cmd *qc); @@ -1652,6 +1661,7 @@ extern int ata_pci_bmdma_init_one(struct pci_dev *pdev, struct scsi_host_template *sht, void *host_priv, int hflags); #endif /* CONFIG_PCI */ +#endif /* CONFIG_ATA_BMDMA */ /** * ata_sff_busy_wait - Wait for a port status register -- cgit v1.1