diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2011-02-24 02:57:27 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2011-07-03 14:55:28 +0400 |
| commit | 6389a77596f36cf04ad8b1c7d43ec1d6cdfe89cb (patch) | |
| tree | 71790cd9538bed25e1e448f83c6d92269993b2ae /drivers/scsi/isci/core/sci_util.c | |
| parent | 103a00c200ab3bb9e598923eb7ba3354fcb3de8d (diff) | |
| download | linux-6389a77596f36cf04ad8b1c7d43ec1d6cdfe89cb.tar.xz | |
isci: have the driver use native SG calls and DMA-API
Remove abstraction for SG building and get rid of callbacks for getting
DMA memory mapping.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/scsi/isci/core/sci_util.c')
| -rw-r--r-- | drivers/scsi/isci/core/sci_util.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/scsi/isci/core/sci_util.c b/drivers/scsi/isci/core/sci_util.c index 03f919ffb413..cb3e9f73828d 100644 --- a/drivers/scsi/isci/core/sci_util.c +++ b/drivers/scsi/isci/core/sci_util.c @@ -84,3 +84,18 @@ void *scic_request_get_virt_addr(struct scic_sds_request *sci_req, dma_addr_t ph return (char *)ireq + offset; } +dma_addr_t scic_io_request_get_dma_addr(struct scic_sds_request *sds_request, + void *virt_addr) +{ + struct isci_request *isci_request = + (struct isci_request *)sci_object_get_association(sds_request); + + char *requested_addr = (char *)virt_addr; + char *base_addr = (char *)isci_request; + + BUG_ON(requested_addr < base_addr); + BUG_ON((requested_addr - base_addr) >= + isci_request->request_alloc_size); + + return isci_request->request_daddr + (requested_addr - base_addr); +} |