diff options
Diffstat (limited to 'drivers/ata/sata_mv.c')
| -rw-r--r-- | drivers/ata/sata_mv.c | 58 |
1 files changed, 41 insertions, 17 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index 11bf6c7..d9832e2 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -69,10 +69,11 @@ #include <linux/device.h> #include <scsi/scsi_host.h> #include <scsi/scsi_cmnd.h> +#include <scsi/scsi_device.h> #include <linux/libata.h> #define DRV_NAME "sata_mv" -#define DRV_VERSION "1.0" +#define DRV_VERSION "1.01" enum { /* BAR's are enumerated in terms of pci_resource_start() terms */ @@ -313,7 +314,10 @@ enum { #define IS_GEN_IIE(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_IIE) enum { - MV_DMA_BOUNDARY = 0xffffffffU, + /* DMA boundary 0xffff is required by the s/g splitting + * we need on /length/ in mv_fill-sg(). + */ + MV_DMA_BOUNDARY = 0xffffU, /* mask of register bits containing lower 32 bits * of EDMA request queue DMA address @@ -417,6 +421,7 @@ static void mv_error_handler(struct ata_port *ap); static void mv_post_int_cmd(struct ata_queued_cmd *qc); static void mv_eh_freeze(struct ata_port *ap); static void mv_eh_thaw(struct ata_port *ap); +static int mv_slave_config(struct scsi_device *sdev); static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio, @@ -448,13 +453,13 @@ static struct scsi_host_template mv5_sht = { .queuecommand = ata_scsi_queuecmd, .can_queue = ATA_DEF_QUEUE, .this_id = ATA_SHT_THIS_ID, - .sg_tablesize = MV_MAX_SG_CT, + .sg_tablesize = MV_MAX_SG_CT / 2, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, .emulated = ATA_SHT_EMULATED, .use_clustering = 1, .proc_name = DRV_NAME, .dma_boundary = MV_DMA_BOUNDARY, - .slave_configure = ata_scsi_slave_config, + .slave_configure = mv_slave_config, .slave_destroy = ata_scsi_slave_destroy, .bios_param = ata_std_bios_param, }; @@ -466,13 +471,13 @@ static struct scsi_host_template mv6_sht = { .queuecommand = ata_scsi_queuecmd, .can_queue = ATA_DEF_QUEUE, .this_id = ATA_SHT_THIS_ID, - .sg_tablesize = MV_MAX_SG_CT, + .sg_tablesize = MV_MAX_SG_CT / 2, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, .emulated = ATA_SHT_EMULATED, .use_clustering = 1, .proc_name = DRV_NAME, .dma_boundary = MV_DMA_BOUNDARY, - .slave_configure = ata_scsi_slave_config, + .slave_configure = mv_slave_config, .slave_destroy = ata_scsi_slave_destroy, .bios_param = ata_std_bios_param, }; @@ -760,6 +765,17 @@ static void mv_irq_clear(struct ata_port *ap) { } +static int mv_slave_config(struct scsi_device *sdev) +{ + int rc = ata_scsi_slave_config(sdev); + if (rc) + return rc; + + blk_queue_max_phys_segments(sdev->request_queue, MV_MAX_SG_CT / 2); + + return 0; /* scsi layer doesn't check return value, sigh */ +} + static void mv_set_edma_ptrs(void __iomem *port_mmio, struct mv_host_priv *hpriv, struct mv_port_priv *pp) @@ -1127,10 +1143,9 @@ static void mv_port_stop(struct ata_port *ap) * LOCKING: * Inherited from caller. */ -static unsigned int mv_fill_sg(struct ata_queued_cmd *qc) +static void mv_fill_sg(struct ata_queued_cmd *qc) { struct mv_port_priv *pp = qc->ap->private_data; - unsigned int n_sg = 0; struct scatterlist *sg; struct mv_sg *mv_sg; @@ -1139,18 +1154,27 @@ static unsigned int mv_fill_sg(struct ata_queued_cmd *qc) dma_addr_t addr = sg_dma_address(sg); u32 sg_len = sg_dma_len(sg); - mv_sg->addr = cpu_to_le32(addr & 0xffffffff); - mv_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16); - mv_sg->flags_size = cpu_to_le32(sg_len & 0xffff); + while (sg_len) { + u32 offset = addr & 0xffff; + u32 len = sg_len; - if (ata_sg_is_last(sg, qc)) - mv_sg->flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL); + if ((offset + sg_len > 0x10000)) + len = 0x10000 - offset; - mv_sg++; - n_sg++; - } + mv_sg->addr = cpu_to_le32(addr & 0xffffffff); + mv_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16); + mv_sg->flags_size = cpu_to_le32(len & 0xffff); + + sg_len -= len; + addr += len; + + if (!sg_len && ata_sg_is_last(sg, qc)) + mv_sg->flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL); - return n_sg; + mv_sg++; + } + + } } static inline void mv_crqb_pack_cmd(__le16 *cmdw, u8 data, u8 addr, unsigned last) |