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RDMA/ocrdma: Convert kernel VA to PA for mmap in user 

In some platforms, when iommu is enabled, the bus address returned by
dma_alloc_coherent is different than the physical address.  ocrdma
should use physical address for mmap-ing the queue memory for the
applications.

This patch adds the use of virt_to_phys() at all such places where
kernel buffer is mapped to user process context.

Signed-off-by: Devesh Sharma <devesh.sharma@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
hifive-unleashed-5.1
Devesh Sharma 2014-09-05 19:35:40 +05:30 committed by Roland Dreier
parent bf67472ca1
commit 1b76d38332
1 changed files with 5 additions and 5 deletions
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10
drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
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@ -388,7 +388,7 @@ struct ib_ucontext *ocrdma_alloc_ucontext(struct ib_device *ibdev,
memset(&resp, 0, sizeof(resp));
resp.ah_tbl_len = ctx->ah_tbl.len;
resp.ah_tbl_page = ctx->ah_tbl.pa;
resp.ah_tbl_page = virt_to_phys(ctx->ah_tbl.va);
status = ocrdma_add_mmap(ctx, resp.ah_tbl_page, resp.ah_tbl_len);
if (status)
@ -870,7 +870,7 @@ static int ocrdma_copy_cq_uresp(struct ocrdma_dev *dev, struct ocrdma_cq *cq,
uresp.page_size = PAGE_ALIGN(cq->len);
uresp.num_pages = 1;
uresp.max_hw_cqe = cq->max_hw_cqe;
uresp.page_addr[0] = cq->pa;
uresp.page_addr[0] = virt_to_phys(cq->va);
uresp.db_page_addr = ocrdma_get_db_addr(dev, uctx->cntxt_pd->id);
uresp.db_page_size = dev->nic_info.db_page_size;
uresp.phase_change = cq->phase_change ? 1 : 0;
@ -1123,13 +1123,13 @@ static int ocrdma_copy_qp_uresp(struct ocrdma_qp *qp,
uresp.sq_dbid = qp->sq.dbid;
uresp.num_sq_pages = 1;
uresp.sq_page_size = PAGE_ALIGN(qp->sq.len);
uresp.sq_page_addr[0] = qp->sq.pa;
uresp.sq_page_addr[0] = virt_to_phys(qp->sq.va);
uresp.num_wqe_allocated = qp->sq.max_cnt;
if (!srq) {
uresp.rq_dbid = qp->rq.dbid;
uresp.num_rq_pages = 1;
uresp.rq_page_size = PAGE_ALIGN(qp->rq.len);
uresp.rq_page_addr[0] = qp->rq.pa;
uresp.rq_page_addr[0] = virt_to_phys(qp->rq.va);
uresp.num_rqe_allocated = qp->rq.max_cnt;
}
uresp.db_page_addr = usr_db;
@ -1680,7 +1680,7 @@ static int ocrdma_copy_srq_uresp(struct ocrdma_dev *dev, struct ocrdma_srq *srq,
memset(&uresp, 0, sizeof(uresp));
uresp.rq_dbid = srq->rq.dbid;
uresp.num_rq_pages = 1;
uresp.rq_page_addr[0] = srq->rq.pa;
uresp.rq_page_addr[0] = virt_to_phys(srq->rq.va);
uresp.rq_page_size = srq->rq.len;
uresp.db_page_addr = dev->nic_info.unmapped_db +
(srq->pd->id * dev->nic_info.db_page_size);