1 files changed, 304 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_misc.c b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_misc.c
new file mode 100644
index 000000000000..948b5ccd2a70
--- /dev/null
+++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_misc.c
@@ -0,0 +1,304 @@
+/*
+ * Copyright (c) 2012-2016 VMware, Inc.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of EITHER the GNU General Public License
+ * version 2 as published by the Free Software Foundation or the BSD
+ * 2-Clause License. This program is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License version 2 for more details at
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program available in the file COPYING in the main
+ * directory of this source tree.
+ *
+ * The BSD 2-Clause License
+ *
+ *     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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/bitmap.h>
+
+#include "pvrdma.h"
+
+int pvrdma_page_dir_init(struct pvrdma_dev *dev, struct pvrdma_page_dir *pdir,
+			 u64 npages, bool alloc_pages)
+{
+	u64 i;
+
+	if (npages > PVRDMA_PAGE_DIR_MAX_PAGES)
+		return -EINVAL;
+
+	memset(pdir, 0, sizeof(*pdir));
+
+	pdir->dir = dma_alloc_coherent(&dev->pdev->dev, PAGE_SIZE,
+				       &pdir->dir_dma, GFP_KERNEL);
+	if (!pdir->dir)
+		goto err;
+
+	pdir->ntables = PVRDMA_PAGE_DIR_TABLE(npages - 1) + 1;
+	pdir->tables = kcalloc(pdir->ntables, sizeof(*pdir->tables),
+			       GFP_KERNEL);
+	if (!pdir->tables)
+		goto err;
+
+	for (i = 0; i < pdir->ntables; i++) {
+		pdir->tables[i] = dma_alloc_coherent(&dev->pdev->dev, PAGE_SIZE,
+						(dma_addr_t *)&pdir->dir[i],
+						GFP_KERNEL);
+		if (!pdir->tables[i])
+			goto err;
+	}
+
+	pdir->npages = npages;
+
+	if (alloc_pages) {
+		pdir->pages = kcalloc(npages, sizeof(*pdir->pages),
+				      GFP_KERNEL);
+		if (!pdir->pages)
+			goto err;
+
+		for (i = 0; i < pdir->npages; i++) {
+			dma_addr_t page_dma;
+
+			pdir->pages[i] = dma_alloc_coherent(&dev->pdev->dev,
+							    PAGE_SIZE,
+							    &page_dma,
+							    GFP_KERNEL);
+			if (!pdir->pages[i])
+				goto err;
+
+			pvrdma_page_dir_insert_dma(pdir, i, page_dma);
+		}
+	}
+
+	return 0;
+
+err:
+	pvrdma_page_dir_cleanup(dev, pdir);
+
+	return -ENOMEM;
+}
+
+static u64 *pvrdma_page_dir_table(struct pvrdma_page_dir *pdir, u64 idx)
+{
+	return pdir->tables[PVRDMA_PAGE_DIR_TABLE(idx)];
+}
+
+dma_addr_t pvrdma_page_dir_get_dma(struct pvrdma_page_dir *pdir, u64 idx)
+{
+	return pvrdma_page_dir_table(pdir, idx)[PVRDMA_PAGE_DIR_PAGE(idx)];
+}
+
+static void pvrdma_page_dir_cleanup_pages(struct pvrdma_dev *dev,
+					  struct pvrdma_page_dir *pdir)
+{
+	if (pdir->pages) {
+		u64 i;
+
+		for (i = 0; i < pdir->npages && pdir->pages[i]; i++) {
+			dma_addr_t page_dma = pvrdma_page_dir_get_dma(pdir, i);
+
+			dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
+					  pdir->pages[i], page_dma);
+		}
+
+		kfree(pdir->pages);
+	}
+}
+
+static void pvrdma_page_dir_cleanup_tables(struct pvrdma_dev *dev,
+					   struct pvrdma_page_dir *pdir)
+{
+	if (pdir->tables) {
+		int i;
+
+		pvrdma_page_dir_cleanup_pages(dev, pdir);
+
+		for (i = 0; i < pdir->ntables; i++) {
+			u64 *table = pdir->tables[i];
+
+			if (table)
+				dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
+						  table, pdir->dir[i]);
+		}
+
+		kfree(pdir->tables);
+	}
+}
+
+void pvrdma_page_dir_cleanup(struct pvrdma_dev *dev,
+			     struct pvrdma_page_dir *pdir)
+{
+	if (pdir->dir) {
+		pvrdma_page_dir_cleanup_tables(dev, pdir);
+		dma_free_coherent(&dev->pdev->dev, PAGE_SIZE,
+				  pdir->dir, pdir->dir_dma);
+	}
+}
+
+int pvrdma_page_dir_insert_dma(struct pvrdma_page_dir *pdir, u64 idx,
+			       dma_addr_t daddr)
+{
+	u64 *table;
+
+	if (idx >= pdir->npages)
+		return -EINVAL;
+
+	table = pvrdma_page_dir_table(pdir, idx);
+	table[PVRDMA_PAGE_DIR_PAGE(idx)] = daddr;
+
+	return 0;
+}
+
+int pvrdma_page_dir_insert_umem(struct pvrdma_page_dir *pdir,
+				struct ib_umem *umem, u64 offset)
+{
+	u64 i = offset;
+	int j, entry;
+	int ret = 0, len = 0;
+	struct scatterlist *sg;
+
+	if (offset >= pdir->npages)
+		return -EINVAL;
+
+	for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
+		len = sg_dma_len(sg) >> PAGE_SHIFT;
+		for (j = 0; j < len; j++) {
+			dma_addr_t addr = sg_dma_address(sg) +
+					  umem->page_size * j;
+
+			ret = pvrdma_page_dir_insert_dma(pdir, i, addr);
+			if (ret)
+				goto exit;
+
+			i++;
+		}
+	}
+
+exit:
+	return ret;
+}
+
+int pvrdma_page_dir_insert_page_list(struct pvrdma_page_dir *pdir,
+				     u64 *page_list,
+				     int num_pages)
+{
+	int i;
+	int ret;
+
+	if (num_pages > pdir->npages)
+		return -EINVAL;
+
+	for (i = 0; i < num_pages; i++) {
+		ret = pvrdma_page_dir_insert_dma(pdir, i, page_list[i]);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+void pvrdma_qp_cap_to_ib(struct ib_qp_cap *dst, const struct pvrdma_qp_cap *src)
+{
+	dst->max_send_wr = src->max_send_wr;
+	dst->max_recv_wr = src->max_recv_wr;
+	dst->max_send_sge = src->max_send_sge;
+	dst->max_recv_sge = src->max_recv_sge;
+	dst->max_inline_data = src->max_inline_data;
+}
+
+void ib_qp_cap_to_pvrdma(struct pvrdma_qp_cap *dst, const struct ib_qp_cap *src)
+{
+	dst->max_send_wr = src->max_send_wr;
+	dst->max_recv_wr = src->max_recv_wr;
+	dst->max_send_sge = src->max_send_sge;
+	dst->max_recv_sge = src->max_recv_sge;
+	dst->max_inline_data = src->max_inline_data;
+}
+
+void pvrdma_gid_to_ib(union ib_gid *dst, const union pvrdma_gid *src)
+{
+	BUILD_BUG_ON(sizeof(union pvrdma_gid) != sizeof(union ib_gid));
+	memcpy(dst, src, sizeof(*src));
+}
+
+void ib_gid_to_pvrdma(union pvrdma_gid *dst, const union ib_gid *src)
+{
+	BUILD_BUG_ON(sizeof(union pvrdma_gid) != sizeof(union ib_gid));
+	memcpy(dst, src, sizeof(*src));
+}
+
+void pvrdma_global_route_to_ib(struct ib_global_route *dst,
+			       const struct pvrdma_global_route *src)
+{
+	pvrdma_gid_to_ib(&dst->dgid, &src->dgid);
+	dst->flow_label = src->flow_label;
+	dst->sgid_index = src->sgid_index;
+	dst->hop_limit = src->hop_limit;
+	dst->traffic_class = src->traffic_class;
+}
+
+void ib_global_route_to_pvrdma(struct pvrdma_global_route *dst,
+			       const struct ib_global_route *src)
+{
+	ib_gid_to_pvrdma(&dst->dgid, &src->dgid);
+	dst->flow_label = src->flow_label;
+	dst->sgid_index = src->sgid_index;
+	dst->hop_limit = src->hop_limit;
+	dst->traffic_class = src->traffic_class;
+}
+
+void pvrdma_ah_attr_to_ib(struct ib_ah_attr *dst,
+			  const struct pvrdma_ah_attr *src)
+{
+	pvrdma_global_route_to_ib(&dst->grh, &src->grh);
+	dst->dlid = src->dlid;
+	dst->sl = src->sl;
+	dst->src_path_bits = src->src_path_bits;
+	dst->static_rate = src->static_rate;
+	dst->ah_flags = src->ah_flags;
+	dst->port_num = src->port_num;
+	memcpy(&dst->dmac, &src->dmac, sizeof(dst->dmac));
+}
+
+void ib_ah_attr_to_pvrdma(struct pvrdma_ah_attr *dst,
+			  const struct ib_ah_attr *src)
+{
+	ib_global_route_to_pvrdma(&dst->grh, &src->grh);
+	dst->dlid = src->dlid;
+	dst->sl = src->sl;
+	dst->src_path_bits = src->src_path_bits;
+	dst->static_rate = src->static_rate;
+	dst->ah_flags = src->ah_flags;
+	dst->port_num = src->port_num;
+	memcpy(&dst->dmac, &src->dmac, sizeof(dst->dmac));
+}