diff options
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 03f919f..cb3e9f7 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); +} |
