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path: root/drivers/infiniband/hw/mlx4/mr.c
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Diffstat (limited to 'drivers/infiniband/hw/mlx4/mr.c')
-rw-r--r--drivers/infiniband/hw/mlx4/mr.c359
1 files changed, 359 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c
new file mode 100644
index 00000000..dca55b19
--- /dev/null
+++ b/drivers/infiniband/hw/mlx4/mr.c
@@ -0,0 +1,359 @@
+/*
+ * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
+ * Copyright (c) 2007, 2008 Mellanox Technologies. 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 <linux/slab.h>
+
+#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 mlx4_write_mtt() and
+ * pass it chunks of appropriate size.
+ */
+ if (i == PAGE_SIZE / sizeof (u64)) {
+ 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, 0);
+ 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;
+}
+
+struct ib_mr *mlx4_ib_alloc_fast_reg_mr(struct ib_pd *pd,
+ int max_page_list_len)
+{
+ struct mlx4_ib_dev *dev = to_mdev(pd->device);
+ struct mlx4_ib_mr *mr;
+ int err;
+
+ mr = kmalloc(sizeof *mr, GFP_KERNEL);
+ if (!mr)
+ return ERR_PTR(-ENOMEM);
+
+ err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, 0, 0, 0,
+ max_page_list_len, 0, &mr->mmr);
+ if (err)
+ goto err_free;
+
+ err = mlx4_mr_enable(dev->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(dev->dev, &mr->mmr);
+
+err_free:
+ kfree(mr);
+ return ERR_PTR(err);
+}
+
+struct ib_fast_reg_page_list *mlx4_ib_alloc_fast_reg_page_list(struct ib_device *ibdev,
+ int page_list_len)
+{
+ struct mlx4_ib_dev *dev = to_mdev(ibdev);
+ struct mlx4_ib_fast_reg_page_list *mfrpl;
+ int size = page_list_len * sizeof (u64);
+
+ if (page_list_len > MLX4_MAX_FAST_REG_PAGES)
+ return ERR_PTR(-EINVAL);
+
+ mfrpl = kmalloc(sizeof *mfrpl, GFP_KERNEL);
+ if (!mfrpl)
+ return ERR_PTR(-ENOMEM);
+
+ mfrpl->ibfrpl.page_list = kmalloc(size, GFP_KERNEL);
+ if (!mfrpl->ibfrpl.page_list)
+ goto err_free;
+
+ mfrpl->mapped_page_list = dma_alloc_coherent(&dev->dev->pdev->dev,
+ size, &mfrpl->map,
+ GFP_KERNEL);
+ if (!mfrpl->mapped_page_list)
+ goto err_free;
+
+ WARN_ON(mfrpl->map & 0x3f);
+
+ return &mfrpl->ibfrpl;
+
+err_free:
+ kfree(mfrpl->ibfrpl.page_list);
+ kfree(mfrpl);
+ return ERR_PTR(-ENOMEM);
+}
+
+void mlx4_ib_free_fast_reg_page_list(struct ib_fast_reg_page_list *page_list)
+{
+ struct mlx4_ib_dev *dev = to_mdev(page_list->device);
+ struct mlx4_ib_fast_reg_page_list *mfrpl = to_mfrpl(page_list);
+ int size = page_list->max_page_list_len * sizeof (u64);
+
+ dma_free_coherent(&dev->dev->pdev->dev, size, mfrpl->mapped_page_list,
+ mfrpl->map);
+ kfree(mfrpl->ibfrpl.page_list);
+ kfree(mfrpl);
+}
+
+struct ib_fmr *mlx4_ib_fmr_alloc(struct ib_pd *pd, int acc,
+ struct ib_fmr_attr *fmr_attr)
+{
+ struct mlx4_ib_dev *dev = to_mdev(pd->device);
+ struct mlx4_ib_fmr *fmr;
+ int err = -ENOMEM;
+
+ fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
+ if (!fmr)
+ return ERR_PTR(-ENOMEM);
+
+ err = mlx4_fmr_alloc(dev->dev, to_mpd(pd)->pdn, convert_access(acc),
+ fmr_attr->max_pages, fmr_attr->max_maps,
+ fmr_attr->page_shift, &fmr->mfmr);
+ if (err)
+ goto err_free;
+
+ err = mlx4_fmr_enable(to_mdev(pd->device)->dev, &fmr->mfmr);
+ if (err)
+ goto err_mr;
+
+ fmr->ibfmr.rkey = fmr->ibfmr.lkey = fmr->mfmr.mr.key;
+
+ return &fmr->ibfmr;
+
+err_mr:
+ mlx4_mr_free(to_mdev(pd->device)->dev, &fmr->mfmr.mr);
+
+err_free:
+ kfree(fmr);
+
+ return ERR_PTR(err);
+}
+
+int mlx4_ib_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
+ int npages, u64 iova)
+{
+ struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
+ struct mlx4_ib_dev *dev = to_mdev(ifmr->ibfmr.device);
+
+ return mlx4_map_phys_fmr(dev->dev, &ifmr->mfmr, page_list, npages, iova,
+ &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
+}
+
+int mlx4_ib_unmap_fmr(struct list_head *fmr_list)
+{
+ struct ib_fmr *ibfmr;
+ int err;
+ struct mlx4_dev *mdev = NULL;
+
+ list_for_each_entry(ibfmr, fmr_list, list) {
+ if (mdev && to_mdev(ibfmr->device)->dev != mdev)
+ return -EINVAL;
+ mdev = to_mdev(ibfmr->device)->dev;
+ }
+
+ if (!mdev)
+ return 0;
+
+ list_for_each_entry(ibfmr, fmr_list, list) {
+ struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
+
+ mlx4_fmr_unmap(mdev, &ifmr->mfmr, &ifmr->ibfmr.lkey, &ifmr->ibfmr.rkey);
+ }
+
+ /*
+ * Make sure all MPT status updates are visible before issuing
+ * SYNC_TPT firmware command.
+ */
+ wmb();
+
+ err = mlx4_SYNC_TPT(mdev);
+ if (err)
+ printk(KERN_WARNING "mlx4_ib: SYNC_TPT error %d when "
+ "unmapping FMRs\n", err);
+
+ return 0;
+}
+
+int mlx4_ib_fmr_dealloc(struct ib_fmr *ibfmr)
+{
+ struct mlx4_ib_fmr *ifmr = to_mfmr(ibfmr);
+ struct mlx4_ib_dev *dev = to_mdev(ibfmr->device);
+ int err;
+
+ err = mlx4_fmr_free(dev->dev, &ifmr->mfmr);
+
+ if (!err)
+ kfree(ifmr);
+
+ return err;
+}
generated by cgit (git 2.34.1) at 2025-01-13 07:38:30 +0000