tree cc7810ff27bc207e264ea183a150600cd8db7bd8
parent 99264c1ee2ce908f95c075cce97698758a793b58
author Roland Dreier <[EMAIL PROTECTED]> Fri, 08 Jul 2005 07:57:19 -0700
committer Linus Torvalds <[EMAIL PROTECTED]> Fri, 08 Jul 2005 08:23:49 -0700
[PATCH] IB uverbs: add mthca user MR support
Add support for userspace memory regions (MRs) to mthca.
Signed-off-by: Roland Dreier <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
drivers/infiniband/hw/mthca/mthca_provider.c | 82 +++++++++++++++++++++++++++
1 files changed, 82 insertions(+)
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c
b/drivers/infiniband/hw/mthca/mthca_provider.c
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -654,6 +654,87 @@ static struct ib_mr *mthca_reg_phys_mr(s
return &mr->ibmr;
}
+static struct ib_mr *mthca_reg_user_mr(struct ib_pd *pd, struct ib_umem
*region,
+ int acc, struct ib_udata *udata)
+{
+ struct mthca_dev *dev = to_mdev(pd->device);
+ struct ib_umem_chunk *chunk;
+ struct mthca_mr *mr;
+ u64 *pages;
+ int shift, n, len;
+ int i, j, k;
+ int err = 0;
+
+ shift = ffs(region->page_size) - 1;
+
+ mr = kmalloc(sizeof *mr, GFP_KERNEL);
+ if (!mr)
+ return ERR_PTR(-ENOMEM);
+
+ n = 0;
+ list_for_each_entry(chunk, ®ion->chunk_list, list)
+ n += chunk->nents;
+
+ mr->mtt = mthca_alloc_mtt(dev, n);
+ if (IS_ERR(mr->mtt)) {
+ err = PTR_ERR(mr->mtt);
+ goto err;
+ }
+
+ pages = (u64 *) __get_free_page(GFP_KERNEL);
+ if (!pages) {
+ err = -ENOMEM;
+ goto err_mtt;
+ }
+
+ i = n = 0;
+
+ list_for_each_entry(chunk, ®ion->chunk_list, list)
+ for (j = 0; j < chunk->nmap; ++j) {
+ len = sg_dma_len(&chunk->page_list[j]) >> shift;
+ for (k = 0; k < len; ++k) {
+ pages[i++] =
sg_dma_address(&chunk->page_list[j]) +
+ region->page_size * k;
+ /*
+ * Be friendly to WRITE_MTT command
+ * and leave two empty slots for the
+ * index and reserved fields of the
+ * mailbox.
+ */
+ if (i == PAGE_SIZE / sizeof (u64) - 2) {
+ err = mthca_write_mtt(dev, mr->mtt,
+ n, pages, i);
+ if (err)
+ goto mtt_done;
+ n += i;
+ i = 0;
+ }
+ }
+ }
+
+ if (i)
+ err = mthca_write_mtt(dev, mr->mtt, n, pages, i);
+mtt_done:
+ free_page((unsigned long) pages);
+ if (err)
+ goto err_mtt;
+
+ err = mthca_mr_alloc(dev, to_mpd(pd)->pd_num, shift, region->virt_base,
+ region->length, convert_access(acc), mr);
+
+ if (err)
+ goto err_mtt;
+
+ return &mr->ibmr;
+
+err_mtt:
+ mthca_free_mtt(dev, mr->mtt);
+
+err:
+ kfree(mr);
+ return ERR_PTR(err);
+}
+
static int mthca_dereg_mr(struct ib_mr *mr)
{
struct mthca_mr *mmr = to_mmr(mr);
@@ -804,6 +885,7 @@ int mthca_register_device(struct mthca_d
dev->ib_dev.poll_cq = mthca_poll_cq;
dev->ib_dev.get_dma_mr = mthca_get_dma_mr;
dev->ib_dev.reg_phys_mr = mthca_reg_phys_mr;
+ dev->ib_dev.reg_user_mr = mthca_reg_user_mr;
dev->ib_dev.dereg_mr = mthca_dereg_mr;
if (dev->mthca_flags & MTHCA_FLAG_FMR) {
-
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