[PATCH/RFC 2.6.21] ehca: ehca_uverbs.c: refactor ehca_mmap() for better readability
Hoang-Nam Nguyen
hnguyen at linux.vnet.ibm.com
Thu Jan 18 09:12:13 EST 2007
Hello,
here is a patch for ehca_uverbs.c with the following changes:
- Rename mm_open/close() to ehca_mm_open/close() respectively
- Refactor ehca_mmap() into sub-functions ehca_mmap_cq/qp(),
which then call the new common sub-functions ehca_mmap_fw()
and ehca_mmap_queue() to register firmware memory block and
queue pages respectively
Roland, please note that I applied the previous patches to
your git tree for-2.6.21 before creating this patch. I also
realized a compile issue with the patch from Michael T. in
ehca_reqs.c regarding "return qp pointer in ib_wc". For this
I'll send another patch.
Thanks!
Nam
Signed-off-by Hoang-Nam Nguyen <hnguyen at de.ibm.com>
---
ehca_uverbs.c | 266 +++++++++++++++++++++++++++++++---------------------------
1 file changed, 146 insertions(+), 120 deletions(-)
diff -Nurp infiniband/drivers/infiniband/hw/ehca/ehca_uverbs.c infiniband_work/drivers/infiniband/hw/ehca/ehca_uverbs.c
--- infiniband/drivers/infiniband/hw/ehca/ehca_uverbs.c 2007-01-17 21:39:01.000000000 +0100
+++ infiniband_work/drivers/infiniband/hw/ehca/ehca_uverbs.c 2007-01-17 21:17:00.000000000 +0100
@@ -68,7 +68,7 @@ int ehca_dealloc_ucontext(struct ib_ucon
return 0;
}
-static void mm_open(struct vm_area_struct *vma)
+static void ehca_mm_open(struct vm_area_struct *vma)
{
u32 *count = (u32*)vma->vm_private_data;
if (!count) {
@@ -84,7 +84,7 @@ static void mm_open(struct vm_area_struc
vma->vm_start, vma->vm_end, *count);
}
-static void mm_close(struct vm_area_struct *vma)
+static void ehca_mm_close(struct vm_area_struct *vma)
{
u32 *count = (u32*)vma->vm_private_data;
if (!count) {
@@ -98,26 +98,150 @@ static void mm_close(struct vm_area_stru
}
static struct vm_operations_struct vm_ops = {
- .open = mm_open,
- .close = mm_close,
+ .open = ehca_mm_open,
+ .close = ehca_mm_close,
};
-static int ehca_mmap_qpages(struct vm_area_struct *vma, struct ipz_queue *queue)
+static int ehca_mmap_fw(struct vm_area_struct *vma, struct h_galpas *galpas,
+ u32 *mm_count)
{
+ int ret;
+ u64 vsize, physical;
+
+ vsize = vma->vm_end - vma->vm_start;
+ if (vsize != EHCA_PAGESIZE) {
+ ehca_gen_err("invalid vsize=%lx", vma->vm_end - vma->vm_start);
+ return -EINVAL;
+ }
+
+ physical = galpas->user.fw_handle;
+ 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);
+ if (unlikely(ret)) {
+ ehca_gen_err("remap_pfn_range() failed ret=%x", ret);
+ return -ENOMEM;
+ }
+
+ vma->vm_private_data = mm_count;
+ (*mm_count)++;
+ vma->vm_ops = &vm_ops;
+
+ return 0;
+}
+
+static int ehca_mmap_queue(struct vm_area_struct *vma, struct ipz_queue *queue,
+ u32 *mm_count)
+{
+ int ret;
u64 start, ofs;
struct page *page;
- int rc = 0;
+
+ vma->vm_flags |= VM_RESERVED;
start = vma->vm_start;
for (ofs = 0; ofs < queue->queue_length; ofs += PAGE_SIZE) {
u64 virt_addr = (u64)ipz_qeit_calc(queue, ofs);
page = virt_to_page(virt_addr);
- rc = vm_insert_page(vma, start, page);
- if (unlikely(rc)) {
- ehca_gen_err("vm_insert_page() failed rc=%x", rc);
- return rc;
+ ret = vm_insert_page(vma, start, page);
+ if (unlikely(ret)) {
+ ehca_gen_err("vm_insert_page() failed rc=%x", ret);
+ return ret;
}
start += PAGE_SIZE;
}
+ vma->vm_private_data = mm_count;
+ (*mm_count)++;
+ vma->vm_ops = &vm_ops;
+
+ return 0;
+}
+
+static int ehca_mmap_cq(struct vm_area_struct *vma, struct ehca_cq *cq,
+ u32 rsrc_type)
+{
+ int ret;
+
+ switch (rsrc_type) {
+ case 1: /* galpa fw handle */
+ ehca_dbg(cq->ib_cq.device, "cq_num=%x fw", cq->cq_number);
+ ret = ehca_mmap_fw(vma, &cq->galpas, &cq->mm_count_galpa);
+ if (unlikely(ret)) {
+ ehca_err(cq->ib_cq.device,
+ "ehca_mmap_fw() failed rc=%x cq_num=%x",
+ ret, cq->cq_number);
+ return ret;
+ }
+ break;
+
+ case 2: /* cq queue_addr */
+ ehca_dbg(cq->ib_cq.device, "cq_num=%x queue", cq->cq_number);
+ ret = ehca_mmap_queue(vma, &cq->ipz_queue, &cq->mm_count_queue);
+ if (unlikely(ret)) {
+ ehca_err(cq->ib_cq.device,
+ "ehca_mmap_queue() failed rc=%x cq_num=%x",
+ ret, cq->cq_number);
+ return ret;
+ }
+ break;
+
+ default:
+ ehca_err(cq->ib_cq.device, "bad resource type=%x cq_num=%x",
+ rsrc_type, cq->cq_number);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int ehca_mmap_qp(struct vm_area_struct *vma, struct ehca_qp *qp,
+ u32 rsrc_type)
+{
+ int ret;
+
+ switch (rsrc_type) {
+ case 1: /* galpa fw handle */
+ ehca_dbg(qp->ib_qp.device, "qp_num=%x fw", qp->ib_qp.qp_num);
+ ret = ehca_mmap_fw(vma, &qp->galpas, &qp->mm_count_galpa);
+ if (unlikely(ret)) {
+ ehca_err(qp->ib_qp.device,
+ "remap_pfn_range() failed ret=%x qp_num=%x",
+ ret, qp->ib_qp.qp_num);
+ return -ENOMEM;
+ }
+ break;
+
+ case 2: /* qp rqueue_addr */
+ ehca_dbg(qp->ib_qp.device, "qp_num=%x rqueue",
+ qp->ib_qp.qp_num);
+ ret = ehca_mmap_queue(vma, &qp->ipz_rqueue, &qp->mm_count_rqueue);
+ if (unlikely(ret)) {
+ ehca_err(qp->ib_qp.device,
+ "ehca_mmap_queue(rq) failed rc=%x qp_num=%x",
+ ret, qp->ib_qp.qp_num);
+ return ret;
+ }
+ break;
+
+ case 3: /* qp squeue_addr */
+ ehca_dbg(qp->ib_qp.device, "qp_num=%x squeue",
+ qp->ib_qp.qp_num);
+ ret = ehca_mmap_queue(vma, &qp->ipz_squeue, &qp->mm_count_squeue);
+ if (unlikely(ret)) {
+ ehca_err(qp->ib_qp.device,
+ "ehca_mmap_queue(sq) failed rc=%x qp_num=%x",
+ ret, qp->ib_qp.qp_num);
+ return ret;
+ }
+ break;
+
+ default:
+ ehca_err(qp->ib_qp.device, "bad resource type=%x qp=num=%x",
+ rsrc_type, qp->ib_qp.qp_num);
+ return -EINVAL;
+ }
+
return 0;
}
@@ -129,7 +253,6 @@ int ehca_mmap(struct ib_ucontext *contex
u32 rsrc_type = (fileoffset >> 24) & 0xF; /* sq,rq,cmnd_window */
u32 cur_pid = current->tgid;
u32 ret;
- u64 vsize, physical;
unsigned long flags;
struct ehca_cq *cq;
struct ehca_qp *qp;
@@ -155,52 +278,12 @@ int ehca_mmap(struct ib_ucontext *contex
if (!cq->ib_cq.uobject || cq->ib_cq.uobject->context != context)
return -EINVAL;
- switch (rsrc_type) {
- case 1: /* galpa fw handle */
- ehca_dbg(cq->ib_cq.device, "cq=%p cq triggerarea", cq);
- vsize = vma->vm_end - vma->vm_start;
- if (vsize != EHCA_PAGESIZE) {
- ehca_err(cq->ib_cq.device, "invalid vsize=%lx",
- vma->vm_end - vma->vm_start);
- return -EINVAL;
- }
-
- physical = cq->galpas.user.fw_handle;
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-
- ehca_dbg(cq->ib_cq.device,
- "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);
- if (unlikely(ret)) {
- ehca_err(cq->ib_cq.device,
- "remap_pfn_range() failed ret=%x",
- ret);
- return -ENOMEM;
- }
- vma->vm_private_data = &cq->mm_count_galpa;
- cq->mm_count_galpa++;
- break;
-
- case 2: /* cq queue_addr */
- ehca_dbg(cq->ib_cq.device, "cq=%p cq q_addr", cq);
- vma->vm_flags |= VM_RESERVED;
- ret = ehca_mmap_qpages(vma, &cq->ipz_queue);
- if (unlikely(ret)) {
- ehca_gen_err("ehca_mmap_qpages() failed rc=%x "
- "cq_num=%x", ret, cq->cq_number);
- return ret;
- }
- vma->vm_private_data = &cq->mm_count_queue;
- cq->mm_count_queue++;
- break;
-
- default:
- ehca_err(cq->ib_cq.device, "bad resource type %x",
- rsrc_type);
- return -EINVAL;
+ ret = ehca_mmap_cq(vma, cq, rsrc_type);
+ if (unlikely(ret)) {
+ ehca_err(cq->ib_cq.device,
+ "ehca_mmap_cq() failed rc=%x cq_num=%x",
+ ret, cq->cq_number);
+ return ret;
}
break;
@@ -224,67 +307,12 @@ int ehca_mmap(struct ib_ucontext *contex
if (!qp->ib_qp.uobject || qp->ib_qp.uobject->context != context)
return -EINVAL;
- switch (rsrc_type) {
- case 1: /* galpa fw handle */
- ehca_dbg(qp->ib_qp.device, "qp=%p qp triggerarea", qp);
- vsize = vma->vm_end - vma->vm_start;
- if (vsize != EHCA_PAGESIZE) {
- ehca_err(qp->ib_qp.device, "invalid vsize=%lx",
- vma->vm_end - vma->vm_start);
- return -EINVAL;
- }
-
- physical = qp->galpas.user.fw_handle;
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-
- ehca_dbg(qp->ib_qp.device, "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);
- if (unlikely(ret)) {
- ehca_err(qp->ib_qp.device,
- "remap_pfn_range() failed ret=%x",
- ret);
- return -ENOMEM;
- }
- vma->vm_private_data = &qp->mm_count_galpa;
- qp->mm_count_galpa++;
- break;
-
- case 2: /* qp rqueue_addr */
- ehca_dbg(qp->ib_qp.device, "qp=%p qp rqueue_addr", qp);
- vma->vm_flags |= VM_RESERVED;
- ret = ehca_mmap_qpages(vma, &qp->ipz_rqueue);
- if (unlikely(ret)) {
- ehca_gen_err("ehca_mmap_qpages(rq) failed "
- "rc=%x qp_num=%x",
- ret, qp->ib_qp.qp_num);
- return ret;
- }
- vma->vm_private_data = &qp->mm_count_rqueue;
- qp->mm_count_rqueue++;
- break;
-
- case 3: /* qp squeue_addr */
- ehca_dbg(qp->ib_qp.device, "qp=%p qp squeue_addr", qp);
- vma->vm_flags |= VM_RESERVED;
- ret = ehca_mmap_qpages(vma, &qp->ipz_squeue);
- if (unlikely(ret)) {
- ehca_gen_err("ehca_mmap_qpages(sq) failed "
- "rc=%x qp_num=%x",
- ret, qp->ib_qp.qp_num);
- return ret;
- }
- vma->vm_private_data = &qp->mm_count_squeue;
- qp->mm_count_squeue++;
- break;
-
- default:
- ehca_err(qp->ib_qp.device, "bad resource type %x",
- rsrc_type);
- return -EINVAL;
+ ret = ehca_mmap_qp(vma, qp, rsrc_type);
+ if (unlikely(ret)) {
+ ehca_err(qp->ib_qp.device,
+ "ehca_mmap_qp() failed rc=%x qp_num=%x",
+ ret, qp->ib_qp.qp_num);
+ return ret;
}
break;
@@ -293,7 +321,5 @@ int ehca_mmap(struct ib_ucontext *contex
return -EINVAL;
}
- vma->vm_ops = &vm_ops;
-
return 0;
}
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