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Diffstat (limited to 'drivers/net/mlx4/mr.c')
-rw-r--r--drivers/net/mlx4/mr.c472
1 files changed, 0 insertions, 472 deletions
diff --git a/drivers/net/mlx4/mr.c b/drivers/net/mlx4/mr.c
deleted file mode 100644
index 5b87183e62c..00000000000
--- a/drivers/net/mlx4/mr.c
+++ /dev/null
@@ -1,472 +0,0 @@
-/*
- * Copyright (c) 2004 Topspin Communications. All rights reserved.
- * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
- * Copyright (c) 2006, 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 <linux/init.h>
-#include <linux/errno.h>
-
-#include <linux/mlx4/cmd.h>
-
-#include "mlx4.h"
-#include "icm.h"
-
-/*
- * Must be packed because mtt_seg is 64 bits but only aligned to 32 bits.
- */
-struct mlx4_mpt_entry {
- __be32 flags;
- __be32 qpn;
- __be32 key;
- __be32 pd;
- __be64 start;
- __be64 length;
- __be32 lkey;
- __be32 win_cnt;
- u8 reserved1[3];
- u8 mtt_rep;
- __be64 mtt_seg;
- __be32 mtt_sz;
- __be32 entity_size;
- __be32 first_byte_offset;
-} __attribute__((packed));
-
-#define MLX4_MPT_FLAG_SW_OWNS (0xfUL << 28)
-#define MLX4_MPT_FLAG_MIO (1 << 17)
-#define MLX4_MPT_FLAG_BIND_ENABLE (1 << 15)
-#define MLX4_MPT_FLAG_PHYSICAL (1 << 9)
-#define MLX4_MPT_FLAG_REGION (1 << 8)
-
-#define MLX4_MTT_FLAG_PRESENT 1
-
-static u32 mlx4_buddy_alloc(struct mlx4_buddy *buddy, int order)
-{
- int o;
- int m;
- u32 seg;
-
- spin_lock(&buddy->lock);
-
- for (o = order; o <= buddy->max_order; ++o) {
- m = 1 << (buddy->max_order - o);
- seg = find_first_bit(buddy->bits[o], m);
- if (seg < m)
- goto found;
- }
-
- spin_unlock(&buddy->lock);
- return -1;
-
- found:
- clear_bit(seg, buddy->bits[o]);
-
- while (o > order) {
- --o;
- seg <<= 1;
- set_bit(seg ^ 1, buddy->bits[o]);
- }
-
- spin_unlock(&buddy->lock);
-
- seg <<= order;
-
- return seg;
-}
-
-static void mlx4_buddy_free(struct mlx4_buddy *buddy, u32 seg, int order)
-{
- seg >>= order;
-
- spin_lock(&buddy->lock);
-
- while (test_bit(seg ^ 1, buddy->bits[order])) {
- clear_bit(seg ^ 1, buddy->bits[order]);
- seg >>= 1;
- ++order;
- }
-
- set_bit(seg, buddy->bits[order]);
-
- spin_unlock(&buddy->lock);
-}
-
-static int __devinit mlx4_buddy_init(struct mlx4_buddy *buddy, int max_order)
-{
- int i, s;
-
- buddy->max_order = max_order;
- spin_lock_init(&buddy->lock);
-
- buddy->bits = kzalloc((buddy->max_order + 1) * sizeof (long *),
- GFP_KERNEL);
- if (!buddy->bits)
- goto err_out;
-
- for (i = 0; i <= buddy->max_order; ++i) {
- s = BITS_TO_LONGS(1 << (buddy->max_order - i));
- buddy->bits[i] = kmalloc(s * sizeof (long), GFP_KERNEL);
- if (!buddy->bits[i])
- goto err_out_free;
- bitmap_zero(buddy->bits[i], 1 << (buddy->max_order - i));
- }
-
- set_bit(0, buddy->bits[buddy->max_order]);
-
- return 0;
-
-err_out_free:
- for (i = 0; i <= buddy->max_order; ++i)
- kfree(buddy->bits[i]);
-
- kfree(buddy->bits);
-
-err_out:
- return -ENOMEM;
-}
-
-static void mlx4_buddy_cleanup(struct mlx4_buddy *buddy)
-{
- int i;
-
- for (i = 0; i <= buddy->max_order; ++i)
- kfree(buddy->bits[i]);
-
- kfree(buddy->bits);
-}
-
-static u32 mlx4_alloc_mtt_range(struct mlx4_dev *dev, int order)
-{
- struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table;
- u32 seg;
-
- seg = mlx4_buddy_alloc(&mr_table->mtt_buddy, order);
- if (seg == -1)
- return -1;
-
- if (mlx4_table_get_range(dev, &mr_table->mtt_table, seg,
- seg + (1 << order) - 1)) {
- mlx4_buddy_free(&mr_table->mtt_buddy, seg, order);
- return -1;
- }
-
- return seg;
-}
-
-int mlx4_mtt_init(struct mlx4_dev *dev, int npages, int page_shift,
- struct mlx4_mtt *mtt)
-{
- int i;
-
- if (!npages) {
- mtt->order = -1;
- mtt->page_shift = MLX4_ICM_PAGE_SHIFT;
- return 0;
- } else
- mtt->page_shift = page_shift;
-
- for (mtt->order = 0, i = MLX4_MTT_ENTRY_PER_SEG; i < npages; i <<= 1)
- ++mtt->order;
-
- mtt->first_seg = mlx4_alloc_mtt_range(dev, mtt->order);
- if (mtt->first_seg == -1)
- return -ENOMEM;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(mlx4_mtt_init);
-
-void mlx4_mtt_cleanup(struct mlx4_dev *dev, struct mlx4_mtt *mtt)
-{
- struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table;
-
- if (mtt->order < 0)
- return;
-
- mlx4_buddy_free(&mr_table->mtt_buddy, mtt->first_seg, mtt->order);
- mlx4_table_put_range(dev, &mr_table->mtt_table, mtt->first_seg,
- mtt->first_seg + (1 << mtt->order) - 1);
-}
-EXPORT_SYMBOL_GPL(mlx4_mtt_cleanup);
-
-u64 mlx4_mtt_addr(struct mlx4_dev *dev, struct mlx4_mtt *mtt)
-{
- return (u64) mtt->first_seg * dev->caps.mtt_entry_sz;
-}
-EXPORT_SYMBOL_GPL(mlx4_mtt_addr);
-
-static u32 hw_index_to_key(u32 ind)
-{
- return (ind >> 24) | (ind << 8);
-}
-
-static u32 key_to_hw_index(u32 key)
-{
- return (key << 24) | (key >> 8);
-}
-
-static int mlx4_SW2HW_MPT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
- int mpt_index)
-{
- return mlx4_cmd(dev, mailbox->dma, mpt_index, 0, MLX4_CMD_SW2HW_MPT,
- MLX4_CMD_TIME_CLASS_B);
-}
-
-static int mlx4_HW2SW_MPT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
- int mpt_index)
-{
- return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, mpt_index,
- !mailbox, MLX4_CMD_HW2SW_MPT, MLX4_CMD_TIME_CLASS_B);
-}
-
-int mlx4_mr_alloc(struct mlx4_dev *dev, u32 pd, u64 iova, u64 size, u32 access,
- int npages, int page_shift, struct mlx4_mr *mr)
-{
- struct mlx4_priv *priv = mlx4_priv(dev);
- u32 index;
- int err;
-
- index = mlx4_bitmap_alloc(&priv->mr_table.mpt_bitmap);
- if (index == -1)
- return -ENOMEM;
-
- mr->iova = iova;
- mr->size = size;
- mr->pd = pd;
- mr->access = access;
- mr->enabled = 0;
- mr->key = hw_index_to_key(index);
-
- err = mlx4_mtt_init(dev, npages, page_shift, &mr->mtt);
- if (err)
- mlx4_bitmap_free(&priv->mr_table.mpt_bitmap, index);
-
- return err;
-}
-EXPORT_SYMBOL_GPL(mlx4_mr_alloc);
-
-void mlx4_mr_free(struct mlx4_dev *dev, struct mlx4_mr *mr)
-{
- struct mlx4_priv *priv = mlx4_priv(dev);
- int err;
-
- if (mr->enabled) {
- err = mlx4_HW2SW_MPT(dev, NULL,
- key_to_hw_index(mr->key) &
- (dev->caps.num_mpts - 1));
- if (err)
- mlx4_warn(dev, "HW2SW_MPT failed (%d)\n", err);
- }
-
- mlx4_mtt_cleanup(dev, &mr->mtt);
- mlx4_bitmap_free(&priv->mr_table.mpt_bitmap, key_to_hw_index(mr->key));
-}
-EXPORT_SYMBOL_GPL(mlx4_mr_free);
-
-int mlx4_mr_enable(struct mlx4_dev *dev, struct mlx4_mr *mr)
-{
- struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table;
- struct mlx4_cmd_mailbox *mailbox;
- struct mlx4_mpt_entry *mpt_entry;
- int err;
-
- err = mlx4_table_get(dev, &mr_table->dmpt_table, key_to_hw_index(mr->key));
- if (err)
- return err;
-
- mailbox = mlx4_alloc_cmd_mailbox(dev);
- if (IS_ERR(mailbox)) {
- err = PTR_ERR(mailbox);
- goto err_table;
- }
- mpt_entry = mailbox->buf;
-
- memset(mpt_entry, 0, sizeof *mpt_entry);
-
- mpt_entry->flags = cpu_to_be32(MLX4_MPT_FLAG_SW_OWNS |
- MLX4_MPT_FLAG_MIO |
- MLX4_MPT_FLAG_REGION |
- mr->access);
-
- mpt_entry->key = cpu_to_be32(key_to_hw_index(mr->key));
- mpt_entry->pd = cpu_to_be32(mr->pd);
- mpt_entry->start = cpu_to_be64(mr->iova);
- mpt_entry->length = cpu_to_be64(mr->size);
- mpt_entry->entity_size = cpu_to_be32(mr->mtt.page_shift);
- if (mr->mtt.order < 0) {
- mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_PHYSICAL);
- mpt_entry->mtt_seg = 0;
- } else
- mpt_entry->mtt_seg = cpu_to_be64(mlx4_mtt_addr(dev, &mr->mtt));
-
- err = mlx4_SW2HW_MPT(dev, mailbox,
- key_to_hw_index(mr->key) & (dev->caps.num_mpts - 1));
- if (err) {
- mlx4_warn(dev, "SW2HW_MPT failed (%d)\n", err);
- goto err_cmd;
- }
-
- mr->enabled = 1;
-
- mlx4_free_cmd_mailbox(dev, mailbox);
-
- return 0;
-
-err_cmd:
- mlx4_free_cmd_mailbox(dev, mailbox);
-
-err_table:
- mlx4_table_put(dev, &mr_table->dmpt_table, key_to_hw_index(mr->key));
- return err;
-}
-EXPORT_SYMBOL_GPL(mlx4_mr_enable);
-
-static int mlx4_WRITE_MTT(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
- int num_mtt)
-{
- return mlx4_cmd(dev, mailbox->dma, num_mtt, 0, MLX4_CMD_WRITE_MTT,
- MLX4_CMD_TIME_CLASS_B);
-}
-
-int mlx4_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
- int start_index, int npages, u64 *page_list)
-{
- struct mlx4_cmd_mailbox *mailbox;
- __be64 *mtt_entry;
- int i;
- int err = 0;
-
- if (mtt->order < 0)
- return -EINVAL;
-
- mailbox = mlx4_alloc_cmd_mailbox(dev);
- if (IS_ERR(mailbox))
- return PTR_ERR(mailbox);
-
- mtt_entry = mailbox->buf;
-
- while (npages > 0) {
- mtt_entry[0] = cpu_to_be64(mlx4_mtt_addr(dev, mtt) + start_index * 8);
- mtt_entry[1] = 0;
-
- for (i = 0; i < npages && i < MLX4_MAILBOX_SIZE / 8 - 2; ++i)
- mtt_entry[i + 2] = cpu_to_be64(page_list[i] |
- MLX4_MTT_FLAG_PRESENT);
-
- /*
- * If we have an odd number of entries to write, add
- * one more dummy entry for firmware efficiency.
- */
- if (i & 1)
- mtt_entry[i + 2] = 0;
-
- err = mlx4_WRITE_MTT(dev, mailbox, (i + 1) & ~1);
- if (err)
- goto out;
-
- npages -= i;
- start_index += i;
- page_list += i;
- }
-
-out:
- mlx4_free_cmd_mailbox(dev, mailbox);
-
- return err;
-}
-EXPORT_SYMBOL_GPL(mlx4_write_mtt);
-
-int mlx4_buf_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
- struct mlx4_buf *buf)
-{
- u64 *page_list;
- int err;
- int i;
-
- page_list = kmalloc(buf->npages * sizeof *page_list, GFP_KERNEL);
- if (!page_list)
- return -ENOMEM;
-
- for (i = 0; i < buf->npages; ++i)
- if (buf->nbufs == 1)
- page_list[i] = buf->u.direct.map + (i << buf->page_shift);
- else
- page_list[i] = buf->u.page_list[i].map;
-
- err = mlx4_write_mtt(dev, mtt, 0, buf->npages, page_list);
-
- kfree(page_list);
- return err;
-}
-EXPORT_SYMBOL_GPL(mlx4_buf_write_mtt);
-
-int __devinit mlx4_init_mr_table(struct mlx4_dev *dev)
-{
- struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table;
- int err;
-
- err = mlx4_bitmap_init(&mr_table->mpt_bitmap, dev->caps.num_mpts,
- ~0, dev->caps.reserved_mrws);
- if (err)
- return err;
-
- err = mlx4_buddy_init(&mr_table->mtt_buddy,
- ilog2(dev->caps.num_mtt_segs));
- if (err)
- goto err_buddy;
-
- if (dev->caps.reserved_mtts) {
- if (mlx4_alloc_mtt_range(dev, ilog2(dev->caps.reserved_mtts)) == -1) {
- mlx4_warn(dev, "MTT table of order %d is too small.\n",
- mr_table->mtt_buddy.max_order);
- err = -ENOMEM;
- goto err_reserve_mtts;
- }
- }
-
- return 0;
-
-err_reserve_mtts:
- mlx4_buddy_cleanup(&mr_table->mtt_buddy);
-
-err_buddy:
- mlx4_bitmap_cleanup(&mr_table->mpt_bitmap);
-
- return err;
-}
-
-void mlx4_cleanup_mr_table(struct mlx4_dev *dev)
-{
- struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table;
-
- mlx4_buddy_cleanup(&mr_table->mtt_buddy);
- mlx4_bitmap_cleanup(&mr_table->mpt_bitmap);
-}
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