--- /dev/null
+/*
+ * 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) |
+ (acc & IB_ACCESS_MW_BIND ? MLX4_PERM_BIND_MW : 0) |
+ MLX4_PERM_LOCAL_READ;
+}
+
+static enum mlx4_mw_type to_mlx4_type(enum ib_mw_type type)
+{
+ switch (type) {
+ case IB_MW_TYPE_1: return MLX4_MW_TYPE_1;
+ case IB_MW_TYPE_2: return MLX4_MW_TYPE_2;
+ default: return -1;
+ }
+}
+
+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:
+ (void) 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;
+ int i, k, entry;
+ int n;
+ int len;
+ int err = 0;
+ struct scatterlist *sg;
+
+ pages = (u64 *) __get_free_page(GFP_KERNEL);
+ if (!pages)
+ return -ENOMEM;
+
+ i = n = 0;
+
+ for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
+ len = sg_dma_len(sg) >> mtt->page_shift;
+ for (k = 0; k < len; ++k) {
+ pages[i++] = sg_dma_address(sg) +
+ 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);
+
+ /* Force registering the memory as writable. */
+ /* Used for memory re-registeration. HCA protects the access */
+ mr->umem = ib_umem_get(pd->uobject->context, start, length,
+ access_flags | IB_ACCESS_LOCAL_WRITE, 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:
+ (void) 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_rereg_user_mr(struct ib_mr *mr, int flags,
+ u64 start, u64 length, u64 virt_addr,
+ int mr_access_flags, struct ib_pd *pd,
+ struct ib_udata *udata)
+{
+ struct mlx4_ib_dev *dev = to_mdev(mr->device);
+ struct mlx4_ib_mr *mmr = to_mmr(mr);
+ struct mlx4_mpt_entry *mpt_entry;
+ struct mlx4_mpt_entry **pmpt_entry = &mpt_entry;
+ int err;
+
+ /* Since we synchronize this call and mlx4_ib_dereg_mr via uverbs,
+ * we assume that the calls can't run concurrently. Otherwise, a
+ * race exists.
+ */
+ err = mlx4_mr_hw_get_mpt(dev->dev, &mmr->mmr, &pmpt_entry);
+
+ if (err)
+ return err;
+
+ if (flags & IB_MR_REREG_PD) {
+ err = mlx4_mr_hw_change_pd(dev->dev, *pmpt_entry,
+ to_mpd(pd)->pdn);
+
+ if (err)
+ goto release_mpt_entry;
+ }
+
+ if (flags & IB_MR_REREG_ACCESS) {
+ err = mlx4_mr_hw_change_access(dev->dev, *pmpt_entry,
+ convert_access(mr_access_flags));
+
+ if (err)
+ goto release_mpt_entry;
+ }
+
+ if (flags & IB_MR_REREG_TRANS) {
+ int shift;
+ int n;
+
+ mlx4_mr_rereg_mem_cleanup(dev->dev, &mmr->mmr);
+ ib_umem_release(mmr->umem);
+ mmr->umem = ib_umem_get(mr->uobject->context, start, length,
+ mr_access_flags |
+ IB_ACCESS_LOCAL_WRITE,
+ 0);
+ if (IS_ERR(mmr->umem)) {
+ err = PTR_ERR(mmr->umem);
+ /* Prevent mlx4_ib_dereg_mr from free'ing invalid pointer */
+ mmr->umem = NULL;
+ goto release_mpt_entry;
+ }
+ n = ib_umem_page_count(mmr->umem);
+ shift = ilog2(mmr->umem->page_size);
+
+ err = mlx4_mr_rereg_mem_write(dev->dev, &mmr->mmr,
+ virt_addr, length, n, shift,
+ *pmpt_entry);
+ if (err) {
+ ib_umem_release(mmr->umem);
+ goto release_mpt_entry;
+ }
+ mmr->mmr.iova = virt_addr;
+ mmr->mmr.size = length;
+
+ err = mlx4_ib_umem_write_mtt(dev, &mmr->mmr.mtt, mmr->umem);
+ if (err) {
+ mlx4_mr_rereg_mem_cleanup(dev->dev, &mmr->mmr);
+ ib_umem_release(mmr->umem);
+ goto release_mpt_entry;
+ }
+ }
+
+ /* If we couldn't transfer the MR to the HCA, just remember to
+ * return a failure. But dereg_mr will free the resources.
+ */
+ err = mlx4_mr_hw_write_mpt(dev->dev, &mmr->mmr, pmpt_entry);
+ if (!err && flags & IB_MR_REREG_ACCESS)
+ mmr->mmr.access = mr_access_flags;
+
+release_mpt_entry:
+ mlx4_mr_hw_put_mpt(dev->dev, pmpt_entry);
+
+ return err;
+}
+
+int mlx4_ib_dereg_mr(struct ib_mr *ibmr)
+{
+ struct mlx4_ib_mr *mr = to_mmr(ibmr);
+ int ret;
+
+ ret = mlx4_mr_free(to_mdev(ibmr->device)->dev, &mr->mmr);
+ if (ret)
+ return ret;
+ if (mr->umem)
+ ib_umem_release(mr->umem);
+ kfree(mr);
+
+ return 0;
+}
+
+struct ib_mw *mlx4_ib_alloc_mw(struct ib_pd *pd, enum ib_mw_type type)
+{
+ struct mlx4_ib_dev *dev = to_mdev(pd->device);
+ struct mlx4_ib_mw *mw;
+ int err;
+
+ mw = kmalloc(sizeof(*mw), GFP_KERNEL);
+ if (!mw)
+ return ERR_PTR(-ENOMEM);
+
+ err = mlx4_mw_alloc(dev->dev, to_mpd(pd)->pdn,
+ to_mlx4_type(type), &mw->mmw);
+ if (err)
+ goto err_free;
+
+ err = mlx4_mw_enable(dev->dev, &mw->mmw);
+ if (err)
+ goto err_mw;
+
+ mw->ibmw.rkey = mw->mmw.key;
+
+ return &mw->ibmw;
+
+err_mw:
+ mlx4_mw_free(dev->dev, &mw->mmw);
+
+err_free:
+ kfree(mw);
+
+ return ERR_PTR(err);
+}
+
+int mlx4_ib_bind_mw(struct ib_qp *qp, struct ib_mw *mw,
+ struct ib_mw_bind *mw_bind)
+{
+ struct ib_send_wr wr;
+ struct ib_send_wr *bad_wr;
+ int ret;
+
+ memset(&wr, 0, sizeof(wr));
+ wr.opcode = IB_WR_BIND_MW;
+ wr.wr_id = mw_bind->wr_id;
+ wr.send_flags = mw_bind->send_flags;
+ wr.wr.bind_mw.mw = mw;
+ wr.wr.bind_mw.bind_info = mw_bind->bind_info;
+ wr.wr.bind_mw.rkey = ib_inc_rkey(mw->rkey);
+
+ ret = mlx4_ib_post_send(qp, &wr, &bad_wr);
+ if (!ret)
+ mw->rkey = wr.wr.bind_mw.rkey;
+
+ return ret;
+}
+
+int mlx4_ib_dealloc_mw(struct ib_mw *ibmw)
+{
+ struct mlx4_ib_mw *mw = to_mmw(ibmw);
+
+ mlx4_mw_free(to_mdev(ibmw->device)->dev, &mw->mmw);
+ kfree(mw);
+
+ 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:
+ (void) 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->persist->
+ 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->persist->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:
+ (void) 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)
+ pr_warn("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;
+}
Code Review / kvmfornfv.git / blobdiff