1 files changed, 184 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c
new file mode 100644
index 000000000000..85ae906f1d12
--- /dev/null
+++ b/drivers/infiniband/hw/mlx4/mr.c
@@ -0,0 +1,184 @@
+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "mlx4_ib.h"
+
+static u32 convert_access(int acc)
+{
+        return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX4_PERM_ATOMIC       : 0) |
+               (acc & IB_ACCESS_REMOTE_WRITE  ? MLX4_PERM_REMOTE_WRITE : 0) |
+               (acc & IB_ACCESS_REMOTE_READ   ? MLX4_PERM_REMOTE_READ  : 0) |
+               (acc & IB_ACCESS_LOCAL_WRITE   ? MLX4_PERM_LOCAL_WRITE  : 0) |
+               MLX4_PERM_LOCAL_READ;
+}
+
+struct ib_mr *mlx4_ib_get_dma_mr(struct ib_pd *pd, int acc)
+{
+        struct mlx4_ib_mr *mr;
+        int err;
+
+        mr = kmalloc(sizeof *mr, GFP_KERNEL);
+        if (!mr)
+                return ERR_PTR(-ENOMEM);
+
+        err = mlx4_mr_alloc(to_mdev(pd->device)->dev, to_mpd(pd)->pdn, 0,
+                            ~0ull, convert_access(acc), 0, 0, &mr->mmr);
+        if (err)
+                goto err_free;
+
+        err = mlx4_mr_enable(to_mdev(pd->device)->dev, &mr->mmr);
+        if (err)
+                goto err_mr;
+
+        mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
+        mr->umem = NULL;
+
+        return &mr->ibmr;
+
+err_mr:
+        mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
+
+err_free:
+        kfree(mr);
+
+        return ERR_PTR(err);
+}
+
+int mlx4_ib_umem_write_mtt(struct mlx4_ib_dev *dev, struct mlx4_mtt *mtt,
+                           struct ib_umem *umem)
+{
+        u64 *pages;
+        struct ib_umem_chunk *chunk;
+        int i, j, k;
+        int n;
+        int len;
+        int err = 0;
+
+        pages = (u64 *) __get_free_page(GFP_KERNEL);
+        if (!pages)
+                return -ENOMEM;
+
+        i = n = 0;
+
+        list_for_each_entry(chunk, &umem->chunk_list, list)
+                for (j = 0; j < chunk->nmap; ++j) {
+                        len = sg_dma_len(&chunk->page_list[j]) >> mtt->page_shift;
+                        for (k = 0; k < len; ++k) {
+                                pages[i++] = sg_dma_address(&chunk->page_list[j]) +
+                                        umem->page_size * k;
+                                /*
+                                 * Be friendly to WRITE_MTT firmware
+                                 * command, and pass it chunks of
+                                 * appropriate size.
+                                 */
+                                if (i == PAGE_SIZE / sizeof (u64) - 2) {
+                                        err = mlx4_write_mtt(dev->dev, mtt, n,
+                                                             i, pages);
+                                        if (err)
+                                                goto out;
+                                        n += i;
+                                        i = 0;
+                                }
+                        }
+                }
+
+        if (i)
+                err = mlx4_write_mtt(dev->dev, mtt, n, i, pages);
+
+out:
+        free_page((unsigned long) pages);
+        return err;
+}
+
+struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
+                                  u64 virt_addr, int access_flags,
+                                  struct ib_udata *udata)
+{
+        struct mlx4_ib_dev *dev = to_mdev(pd->device);
+        struct mlx4_ib_mr *mr;
+        int shift;
+        int err;
+        int n;
+
+        mr = kmalloc(sizeof *mr, GFP_KERNEL);
+        if (!mr)
+                return ERR_PTR(-ENOMEM);
+
+        mr->umem = ib_umem_get(pd->uobject->context, start, length, access_flags);
+        if (IS_ERR(mr->umem)) {
+                err = PTR_ERR(mr->umem);
+                goto err_free;
+        }
+
+        n = ib_umem_page_count(mr->umem);
+        shift = ilog2(mr->umem->page_size);
+
+        err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length,
+                            convert_access(access_flags), n, shift, &mr->mmr);
+        if (err)
+                goto err_umem;
+
+        err = mlx4_ib_umem_write_mtt(dev, &mr->mmr.mtt, mr->umem);
+        if (err)
+                goto err_mr;
+
+        err = mlx4_mr_enable(dev->dev, &mr->mmr);
+        if (err)
+                goto err_mr;
+
+        mr->ibmr.rkey = mr->ibmr.lkey = mr->mmr.key;
+
+        return &mr->ibmr;
+
+err_mr:
+        mlx4_mr_free(to_mdev(pd->device)->dev, &mr->mmr);
+
+err_umem:
+        ib_umem_release(mr->umem);
+
+err_free:
+        kfree(mr);
+
+        return ERR_PTR(err);
+}
+
+int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
+{
+        struct mlx4_ib_mr *mr = to_mmr(ibmr);
+
+        mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr);
+        if (mr->umem)
+                ib_umem_release(mr->umem);
+        kfree(mr);
+
+        return 0;
+}