diff options
author | Hoang-Nam Nguyen <hnguyen@de.ibm.com> | 2007-09-11 15:31:06 +0200 |
---|---|---|
committer | Roland Dreier <rolandd@cisco.com> | 2007-10-09 19:59:09 -0700 |
commit | e390d3b52f791fcea26312ba4982cda82052727b (patch) | |
tree | 399af315b321e57c88cca886cd3a69c05360891b /drivers/infiniband/hw/ehca | |
parent | 5281a4b8a0c6bac0c070913ec25868faa06a3115 (diff) | |
download | linux-e390d3b52f791fcea26312ba4982cda82052727b.tar.bz2 |
IB/ehca: Use remap_4k_pfn() to map firmware contexts to user space
Use Paul's new remap_4k_pfn() function to map our 4K firmware contexts
into user space on 64K-page machines without exposing neighboring
firmware contexts. Return the context's offset within a 64K page to
user space so it can determine the proper virtual address.
For details about remap_4k_pfn(), see commit 721151d0 or
http://patchwork.ozlabs.org/linuxppc/patch?id=10281
Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/ehca')
-rw-r--r-- | drivers/infiniband/hw/ehca/ehca_classes.h | 4 | ||||
-rw-r--r-- | drivers/infiniband/hw/ehca/ehca_cq.c | 2 | ||||
-rw-r--r-- | drivers/infiniband/hw/ehca/ehca_qp.c | 2 | ||||
-rw-r--r-- | drivers/infiniband/hw/ehca/ehca_uverbs.c | 6 |
4 files changed, 10 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/ehca/ehca_classes.h b/drivers/infiniband/hw/ehca/ehca_classes.h index 0d69f0f001d9..0942a173881c 100644 --- a/drivers/infiniband/hw/ehca/ehca_classes.h +++ b/drivers/infiniband/hw/ehca/ehca_classes.h @@ -338,6 +338,8 @@ struct ehca_create_cq_resp { u32 cq_number; u32 token; struct ipzu_queue_resp ipz_queue; + u32 fw_handle_ofs; + u32 dummy; }; struct ehca_create_qp_resp { @@ -348,7 +350,7 @@ struct ehca_create_qp_resp { u32 qkey; /* qp_num assigned by ehca: sqp0/1 may have got different numbers */ u32 real_qp_num; - u32 dummy; /* padding for 8 byte alignment */ + u32 fw_handle_ofs; struct ipzu_queue_resp ipz_squeue; struct ipzu_queue_resp ipz_rqueue; }; diff --git a/drivers/infiniband/hw/ehca/ehca_cq.c b/drivers/infiniband/hw/ehca/ehca_cq.c index a6f17e488c77..d68603ddfc2c 100644 --- a/drivers/infiniband/hw/ehca/ehca_cq.c +++ b/drivers/infiniband/hw/ehca/ehca_cq.c @@ -281,6 +281,8 @@ struct ib_cq *ehca_create_cq(struct ib_device *device, int cqe, int comp_vector, resp.ipz_queue.queue_length = ipz_queue->queue_length; resp.ipz_queue.pagesize = ipz_queue->pagesize; resp.ipz_queue.toggle_state = ipz_queue->toggle_state; + resp.fw_handle_ofs = (u32) + (my_cq->galpas.user.fw_handle & (PAGE_SIZE - 1)); if (ib_copy_to_udata(udata, &resp, sizeof(resp))) { ehca_err(device, "Copy to udata failed."); goto create_cq_exit4; diff --git a/drivers/infiniband/hw/ehca/ehca_qp.c b/drivers/infiniband/hw/ehca/ehca_qp.c index bfae1c228b2f..e89fdca7fa19 100644 --- a/drivers/infiniband/hw/ehca/ehca_qp.c +++ b/drivers/infiniband/hw/ehca/ehca_qp.c @@ -749,6 +749,8 @@ static struct ehca_qp *internal_create_qp( queue2resp(&resp.ipz_squeue, &my_qp->ipz_squeue); if (HAS_RQ(my_qp)) queue2resp(&resp.ipz_rqueue, &my_qp->ipz_rqueue); + resp.fw_handle_ofs = (u32) + (my_qp->galpas.user.fw_handle & (PAGE_SIZE - 1)); if (ib_copy_to_udata(udata, &resp, sizeof resp)) { ehca_err(pd->device, "Copy to udata failed"); diff --git a/drivers/infiniband/hw/ehca/ehca_uverbs.c b/drivers/infiniband/hw/ehca/ehca_uverbs.c index 3340f49f0211..84a16bcfd536 100644 --- a/drivers/infiniband/hw/ehca/ehca_uverbs.c +++ b/drivers/infiniband/hw/ehca/ehca_uverbs.c @@ -109,7 +109,7 @@ static int ehca_mmap_fw(struct vm_area_struct *vma, struct h_galpas *galpas, u64 vsize, physical; vsize = vma->vm_end - vma->vm_start; - if (vsize != EHCA_PAGESIZE) { + if (vsize < EHCA_PAGESIZE) { ehca_gen_err("invalid vsize=%lx", vma->vm_end - vma->vm_start); return -EINVAL; } @@ -118,8 +118,8 @@ static int ehca_mmap_fw(struct vm_area_struct *vma, struct h_galpas *galpas, vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); ehca_gen_dbg("vsize=%lx physical=%lx", vsize, physical); /* VM_IO | VM_RESERVED are set by remap_pfn_range() */ - ret = remap_pfn_range(vma, vma->vm_start, physical >> PAGE_SHIFT, - vsize, vma->vm_page_prot); + ret = remap_4k_pfn(vma, vma->vm_start, physical >> EHCA_PAGESHIFT, + vma->vm_page_prot); if (unlikely(ret)) { ehca_gen_err("remap_pfn_range() failed ret=%x", ret); return -ENOMEM; |