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[SCSI] qla2xxx: Use dma_get_required_mask() in determining the 'ideal' DMA mask.

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In order to efficiently utilise the ISP's IOCB
request-queue, use the dma_get_required_mask() function to
determine the use of command-type 2 or 3 IOCBs when queueing
SCSI commands.  This applies to ISP2[123]xx chips only, as
the ISP24xx uses command-type 7 IOCBs which use 64bit DSDs.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Andrew Vasquez 2005-08-26 19:08:00 -07:00 committed by James Bottomley
parent c6678e0cfb
commit 7524f9b9e7
1 changed files with 10 additions and 23 deletions
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33
drivers/scsi/qla2xxx/qla_os.c
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@ -1113,36 +1113,23 @@ qla2xxx_slave_destroy(struct scsi_device *sdev)
static void
qla2x00_config_dma_addressing(scsi_qla_host_t *ha)
{
/* Assume 32bit DMA address */
/* Assume a 32bit DMA mask. */
ha->flags.enable_64bit_addressing = 0;
/*
* Given the two variants pci_set_dma_mask(), allow the compiler to
* assist in setting the proper dma mask.
*/
if (sizeof(dma_addr_t) > 4) {
if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
if (!dma_set_mask(&ha->pdev->dev, DMA_64BIT_MASK)) {
/* Any upper-dword bits set? */
if (MSD(dma_get_required_mask(&ha->pdev->dev)) &&
!pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) {
/* Ok, a 64bit DMA mask is applicable. */
ha->flags.enable_64bit_addressing = 1;
ha->isp_ops.calc_req_entries = qla2x00_calc_iocbs_64;
ha->isp_ops.build_iocbs = qla2x00_build_scsi_iocbs_64;
if (pci_set_consistent_dma_mask(ha->pdev,
DMA_64BIT_MASK)) {
qla_printk(KERN_DEBUG, ha,
"Failed to set 64 bit PCI consistent mask; "
"using 32 bit.\n");
pci_set_consistent_dma_mask(ha->pdev,
DMA_32BIT_MASK);
}
} else {
qla_printk(KERN_DEBUG, ha,
"Failed to set 64 bit PCI DMA mask, falling back "
"to 32 bit MASK.\n");
pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
return;
}
} else {
pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
}
dma_set_mask(&ha->pdev->dev, DMA_32BIT_MASK);
pci_set_consistent_dma_mask(ha->pdev, DMA_32BIT_MASK);
}
static int