diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/net/ethernet/mellanox/mlx4/mr.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/net/ethernet/mellanox/mlx4/mr.c | 900 |
1 files changed, 0 insertions, 900 deletions
diff --git a/ANDROID_3.4.5/drivers/net/ethernet/mellanox/mlx4/mr.c b/ANDROID_3.4.5/drivers/net/ethernet/mellanox/mlx4/mr.c deleted file mode 100644 index fe2ac844..00000000 --- a/ANDROID_3.4.5/drivers/net/ethernet/mellanox/mlx4/mr.c +++ /dev/null @@ -1,900 +0,0 @@ -/* - * Copyright (c) 2004 Topspin Communications. All rights reserved. - * Copyright (c) 2005, 2006, 2007, 2008 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/export.h> -#include <linux/slab.h> -#include <linux/kernel.h> - -#include <linux/mlx4/cmd.h> - -#include "mlx4.h" -#include "icm.h" - -#define MLX4_MPT_FLAG_SW_OWNS (0xfUL << 28) -#define MLX4_MPT_FLAG_FREE (0x3UL << 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_MPT_PD_FLAG_FAST_REG (1 << 27) -#define MLX4_MPT_PD_FLAG_RAE (1 << 28) -#define MLX4_MPT_PD_FLAG_EN_INV (3 << 24) - -#define MLX4_MPT_STATUS_SW 0xF0 -#define MLX4_MPT_STATUS_HW 0x00 - -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) - if (buddy->num_free[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]); - --buddy->num_free[o]; - - while (o > order) { - --o; - seg <<= 1; - set_bit(seg ^ 1, buddy->bits[o]); - ++buddy->num_free[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]); - --buddy->num_free[order]; - seg >>= 1; - ++order; - } - - set_bit(seg, buddy->bits[order]); - ++buddy->num_free[order]; - - spin_unlock(&buddy->lock); -} - -static int 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); - buddy->num_free = kcalloc((buddy->max_order + 1), sizeof *buddy->num_free, - GFP_KERNEL); - if (!buddy->bits || !buddy->num_free) - 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]); - buddy->num_free[buddy->max_order] = 1; - - return 0; - -err_out_free: - for (i = 0; i <= buddy->max_order; ++i) - kfree(buddy->bits[i]); - -err_out: - kfree(buddy->bits); - kfree(buddy->num_free); - - 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); - kfree(buddy->num_free); -} - -u32 __mlx4_alloc_mtt_range(struct mlx4_dev *dev, int order) -{ - struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; - u32 seg; - int seg_order; - u32 offset; - - seg_order = max_t(int, order - log_mtts_per_seg, 0); - - seg = mlx4_buddy_alloc(&mr_table->mtt_buddy, seg_order); - if (seg == -1) - return -1; - - offset = seg * (1 << log_mtts_per_seg); - - if (mlx4_table_get_range(dev, &mr_table->mtt_table, offset, - offset + (1 << order) - 1)) { - mlx4_buddy_free(&mr_table->mtt_buddy, seg, seg_order); - return -1; - } - - return offset; -} - -static u32 mlx4_alloc_mtt_range(struct mlx4_dev *dev, int order) -{ - u64 in_param; - u64 out_param; - int err; - - if (mlx4_is_mfunc(dev)) { - set_param_l(&in_param, order); - err = mlx4_cmd_imm(dev, in_param, &out_param, RES_MTT, - RES_OP_RESERVE_AND_MAP, - MLX4_CMD_ALLOC_RES, - MLX4_CMD_TIME_CLASS_A, - MLX4_CMD_WRAPPED); - if (err) - return -1; - return get_param_l(&out_param); - } - return __mlx4_alloc_mtt_range(dev, order); -} - -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 = 1; i < npages; i <<= 1) - ++mtt->order; - - mtt->offset = mlx4_alloc_mtt_range(dev, mtt->order); - if (mtt->offset == -1) - return -ENOMEM; - - return 0; -} -EXPORT_SYMBOL_GPL(mlx4_mtt_init); - -void __mlx4_free_mtt_range(struct mlx4_dev *dev, u32 offset, int order) -{ - u32 first_seg; - int seg_order; - struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; - - seg_order = max_t(int, order - log_mtts_per_seg, 0); - first_seg = offset / (1 << log_mtts_per_seg); - - mlx4_buddy_free(&mr_table->mtt_buddy, first_seg, seg_order); - mlx4_table_put_range(dev, &mr_table->mtt_table, offset, - offset + (1 << order) - 1); -} - -static void mlx4_free_mtt_range(struct mlx4_dev *dev, u32 offset, int order) -{ - u64 in_param; - int err; - - if (mlx4_is_mfunc(dev)) { - set_param_l(&in_param, offset); - set_param_h(&in_param, order); - err = mlx4_cmd(dev, in_param, RES_MTT, RES_OP_RESERVE_AND_MAP, - MLX4_CMD_FREE_RES, - MLX4_CMD_TIME_CLASS_A, - MLX4_CMD_WRAPPED); - if (err) - mlx4_warn(dev, "Failed to free mtt range at:" - "%d order:%d\n", offset, order); - return; - } - __mlx4_free_mtt_range(dev, offset, order); -} - -void mlx4_mtt_cleanup(struct mlx4_dev *dev, struct mlx4_mtt *mtt) -{ - if (mtt->order < 0) - return; - - mlx4_free_mtt_range(dev, mtt->offset, mtt->order); -} -EXPORT_SYMBOL_GPL(mlx4_mtt_cleanup); - -u64 mlx4_mtt_addr(struct mlx4_dev *dev, struct mlx4_mtt *mtt) -{ - return (u64) mtt->offset * 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, - MLX4_CMD_WRAPPED); -} - -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, MLX4_CMD_WRAPPED); -} - -static int mlx4_mr_alloc_reserved(struct mlx4_dev *dev, u32 mridx, u32 pd, - u64 iova, u64 size, u32 access, int npages, - int page_shift, struct mlx4_mr *mr) -{ - mr->iova = iova; - mr->size = size; - mr->pd = pd; - mr->access = access; - mr->enabled = MLX4_MR_DISABLED; - mr->key = hw_index_to_key(mridx); - - return mlx4_mtt_init(dev, npages, page_shift, &mr->mtt); -} - -static int mlx4_WRITE_MTT(struct mlx4_dev *dev, - struct mlx4_cmd_mailbox *mailbox, - int num_entries) -{ - return mlx4_cmd(dev, mailbox->dma, num_entries, 0, MLX4_CMD_WRITE_MTT, - MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); -} - -int __mlx4_mr_reserve(struct mlx4_dev *dev) -{ - struct mlx4_priv *priv = mlx4_priv(dev); - - return mlx4_bitmap_alloc(&priv->mr_table.mpt_bitmap); -} - -static int mlx4_mr_reserve(struct mlx4_dev *dev) -{ - u64 out_param; - - if (mlx4_is_mfunc(dev)) { - if (mlx4_cmd_imm(dev, 0, &out_param, RES_MPT, RES_OP_RESERVE, - MLX4_CMD_ALLOC_RES, - MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED)) - return -1; - return get_param_l(&out_param); - } - return __mlx4_mr_reserve(dev); -} - -void __mlx4_mr_release(struct mlx4_dev *dev, u32 index) -{ - struct mlx4_priv *priv = mlx4_priv(dev); - - mlx4_bitmap_free(&priv->mr_table.mpt_bitmap, index); -} - -static void mlx4_mr_release(struct mlx4_dev *dev, u32 index) -{ - u64 in_param; - - if (mlx4_is_mfunc(dev)) { - set_param_l(&in_param, index); - if (mlx4_cmd(dev, in_param, RES_MPT, RES_OP_RESERVE, - MLX4_CMD_FREE_RES, - MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED)) - mlx4_warn(dev, "Failed to release mr index:%d\n", - index); - return; - } - __mlx4_mr_release(dev, index); -} - -int __mlx4_mr_alloc_icm(struct mlx4_dev *dev, u32 index) -{ - struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; - - return mlx4_table_get(dev, &mr_table->dmpt_table, index); -} - -static int mlx4_mr_alloc_icm(struct mlx4_dev *dev, u32 index) -{ - u64 param; - - if (mlx4_is_mfunc(dev)) { - set_param_l(¶m, index); - return mlx4_cmd_imm(dev, param, ¶m, RES_MPT, RES_OP_MAP_ICM, - MLX4_CMD_ALLOC_RES, - MLX4_CMD_TIME_CLASS_A, - MLX4_CMD_WRAPPED); - } - return __mlx4_mr_alloc_icm(dev, index); -} - -void __mlx4_mr_free_icm(struct mlx4_dev *dev, u32 index) -{ - struct mlx4_mr_table *mr_table = &mlx4_priv(dev)->mr_table; - - mlx4_table_put(dev, &mr_table->dmpt_table, index); -} - -static void mlx4_mr_free_icm(struct mlx4_dev *dev, u32 index) -{ - u64 in_param; - - if (mlx4_is_mfunc(dev)) { - set_param_l(&in_param, index); - if (mlx4_cmd(dev, in_param, RES_MPT, RES_OP_MAP_ICM, - MLX4_CMD_FREE_RES, MLX4_CMD_TIME_CLASS_A, - MLX4_CMD_WRAPPED)) - mlx4_warn(dev, "Failed to free icm of mr index:%d\n", - index); - return; - } - return __mlx4_mr_free_icm(dev, index); -} - -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) -{ - u32 index; - int err; - - index = mlx4_mr_reserve(dev); - if (index == -1) - return -ENOMEM; - - err = mlx4_mr_alloc_reserved(dev, index, pd, iova, size, - access, npages, page_shift, mr); - if (err) - mlx4_mr_release(dev, index); - - return err; -} -EXPORT_SYMBOL_GPL(mlx4_mr_alloc); - -static void mlx4_mr_free_reserved(struct mlx4_dev *dev, struct mlx4_mr *mr) -{ - int err; - - if (mr->enabled == MLX4_MR_EN_HW) { - err = mlx4_HW2SW_MPT(dev, NULL, - key_to_hw_index(mr->key) & - (dev->caps.num_mpts - 1)); - if (err) - mlx4_warn(dev, "xxx HW2SW_MPT failed (%d)\n", err); - - mr->enabled = MLX4_MR_EN_SW; - } - mlx4_mtt_cleanup(dev, &mr->mtt); -} - -void mlx4_mr_free(struct mlx4_dev *dev, struct mlx4_mr *mr) -{ - mlx4_mr_free_reserved(dev, mr); - if (mr->enabled) - mlx4_mr_free_icm(dev, key_to_hw_index(mr->key)); - mlx4_mr_release(dev, 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_cmd_mailbox *mailbox; - struct mlx4_mpt_entry *mpt_entry; - int err; - - err = mlx4_mr_alloc_icm(dev, 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_MIO | - MLX4_MPT_FLAG_REGION | - mr->access); - - mpt_entry->key = cpu_to_be32(key_to_hw_index(mr->key)); - mpt_entry->pd_flags = cpu_to_be32(mr->pd | MLX4_MPT_PD_FLAG_EN_INV); - 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_addr = 0; - } else { - mpt_entry->mtt_addr = cpu_to_be64(mlx4_mtt_addr(dev, - &mr->mtt)); - } - - if (mr->mtt.order >= 0 && mr->mtt.page_shift == 0) { - /* fast register MR in free state */ - mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_FREE); - mpt_entry->pd_flags |= cpu_to_be32(MLX4_MPT_PD_FLAG_FAST_REG | - MLX4_MPT_PD_FLAG_RAE); - mpt_entry->mtt_sz = cpu_to_be32(1 << mr->mtt.order); - } else { - mpt_entry->flags |= cpu_to_be32(MLX4_MPT_FLAG_SW_OWNS); - } - - 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 = MLX4_MR_EN_HW; - - mlx4_free_cmd_mailbox(dev, mailbox); - - return 0; - -err_cmd: - mlx4_free_cmd_mailbox(dev, mailbox); - -err_table: - mlx4_mr_free_icm(dev, key_to_hw_index(mr->key)); - return err; -} -EXPORT_SYMBOL_GPL(mlx4_mr_enable); - -static int mlx4_write_mtt_chunk(struct mlx4_dev *dev, struct mlx4_mtt *mtt, - int start_index, int npages, u64 *page_list) -{ - struct mlx4_priv *priv = mlx4_priv(dev); - __be64 *mtts; - dma_addr_t dma_handle; - int i; - - mtts = mlx4_table_find(&priv->mr_table.mtt_table, mtt->offset + - start_index, &dma_handle); - - if (!mtts) - return -ENOMEM; - - dma_sync_single_for_cpu(&dev->pdev->dev, dma_handle, - npages * sizeof (u64), DMA_TO_DEVICE); - - for (i = 0; i < npages; ++i) - mtts[i] = cpu_to_be64(page_list[i] | MLX4_MTT_FLAG_PRESENT); - - dma_sync_single_for_device(&dev->pdev->dev, dma_handle, - npages * sizeof (u64), DMA_TO_DEVICE); - - return 0; -} - -int __mlx4_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt, - int start_index, int npages, u64 *page_list) -{ - int err = 0; - int chunk; - int mtts_per_page; - int max_mtts_first_page; - - /* compute how may mtts fit in the first page */ - mtts_per_page = PAGE_SIZE / sizeof(u64); - max_mtts_first_page = mtts_per_page - (mtt->offset + start_index) - % mtts_per_page; - - chunk = min_t(int, max_mtts_first_page, npages); - - while (npages > 0) { - err = mlx4_write_mtt_chunk(dev, mtt, start_index, chunk, page_list); - if (err) - return err; - npages -= chunk; - start_index += chunk; - page_list += chunk; - - chunk = min_t(int, mtts_per_page, npages); - } - return err; -} - -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 = NULL; - __be64 *inbox = NULL; - int chunk; - int err = 0; - int i; - - if (mtt->order < 0) - return -EINVAL; - - if (mlx4_is_mfunc(dev)) { - mailbox = mlx4_alloc_cmd_mailbox(dev); - if (IS_ERR(mailbox)) - return PTR_ERR(mailbox); - inbox = mailbox->buf; - - while (npages > 0) { - chunk = min_t(int, MLX4_MAILBOX_SIZE / sizeof(u64) - 2, - npages); - inbox[0] = cpu_to_be64(mtt->offset + start_index); - inbox[1] = 0; - for (i = 0; i < chunk; ++i) - inbox[i + 2] = cpu_to_be64(page_list[i] | - MLX4_MTT_FLAG_PRESENT); - err = mlx4_WRITE_MTT(dev, mailbox, chunk); - if (err) { - mlx4_free_cmd_mailbox(dev, mailbox); - return err; - } - - npages -= chunk; - start_index += chunk; - page_list += chunk; - } - mlx4_free_cmd_mailbox(dev, mailbox); - return err; - } - - return __mlx4_write_mtt(dev, mtt, start_index, npages, page_list); -} -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->direct.map + (i << buf->page_shift); - else - page_list[i] = buf->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 mlx4_init_mr_table(struct mlx4_dev *dev) -{ - struct mlx4_priv *priv = mlx4_priv(dev); - struct mlx4_mr_table *mr_table = &priv->mr_table; - int err; - - if (!is_power_of_2(dev->caps.num_mpts)) - return -EINVAL; - - /* Nothing to do for slaves - all MR handling is forwarded - * to the master */ - if (mlx4_is_slave(dev)) - return 0; - - err = mlx4_bitmap_init(&mr_table->mpt_bitmap, dev->caps.num_mpts, - ~0, dev->caps.reserved_mrws, 0); - if (err) - return err; - - err = mlx4_buddy_init(&mr_table->mtt_buddy, - ilog2(dev->caps.num_mtts / - (1 << log_mtts_per_seg))); - if (err) - goto err_buddy; - - if (dev->caps.reserved_mtts) { - priv->reserved_mtts = - mlx4_alloc_mtt_range(dev, - fls(dev->caps.reserved_mtts - 1)); - if (priv->reserved_mtts < 0) { - 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_priv *priv = mlx4_priv(dev); - struct mlx4_mr_table *mr_table = &priv->mr_table; - - if (mlx4_is_slave(dev)) - return; - if (priv->reserved_mtts >= 0) - mlx4_free_mtt_range(dev, priv->reserved_mtts, - fls(dev->caps.reserved_mtts - 1)); - mlx4_buddy_cleanup(&mr_table->mtt_buddy); - mlx4_bitmap_cleanup(&mr_table->mpt_bitmap); -} - -static inline int mlx4_check_fmr(struct mlx4_fmr *fmr, u64 *page_list, - int npages, u64 iova) -{ - int i, page_mask; - - if (npages > fmr->max_pages) - return -EINVAL; - - page_mask = (1 << fmr->page_shift) - 1; - - /* We are getting page lists, so va must be page aligned. */ - if (iova & page_mask) - return -EINVAL; - - /* Trust the user not to pass misaligned data in page_list */ - if (0) - for (i = 0; i < npages; ++i) { - if (page_list[i] & ~page_mask) - return -EINVAL; - } - - if (fmr->maps >= fmr->max_maps) - return -EINVAL; - - return 0; -} - -int mlx4_map_phys_fmr(struct mlx4_dev *dev, struct mlx4_fmr *fmr, u64 *page_list, - int npages, u64 iova, u32 *lkey, u32 *rkey) -{ - u32 key; - int i, err; - - err = mlx4_check_fmr(fmr, page_list, npages, iova); - if (err) - return err; - - ++fmr->maps; - - key = key_to_hw_index(fmr->mr.key); - key += dev->caps.num_mpts; - *lkey = *rkey = fmr->mr.key = hw_index_to_key(key); - - *(u8 *) fmr->mpt = MLX4_MPT_STATUS_SW; - - /* Make sure MPT status is visible before writing MTT entries */ - wmb(); - - dma_sync_single_for_cpu(&dev->pdev->dev, fmr->dma_handle, - npages * sizeof(u64), DMA_TO_DEVICE); - - for (i = 0; i < npages; ++i) - fmr->mtts[i] = cpu_to_be64(page_list[i] | MLX4_MTT_FLAG_PRESENT); - - dma_sync_single_for_device(&dev->pdev->dev, fmr->dma_handle, - npages * sizeof(u64), DMA_TO_DEVICE); - - fmr->mpt->key = cpu_to_be32(key); - fmr->mpt->lkey = cpu_to_be32(key); - fmr->mpt->length = cpu_to_be64(npages * (1ull << fmr->page_shift)); - fmr->mpt->start = cpu_to_be64(iova); - - /* Make MTT entries are visible before setting MPT status */ - wmb(); - - *(u8 *) fmr->mpt = MLX4_MPT_STATUS_HW; - - /* Make sure MPT status is visible before consumer can use FMR */ - wmb(); - - return 0; -} -EXPORT_SYMBOL_GPL(mlx4_map_phys_fmr); - -int mlx4_fmr_alloc(struct mlx4_dev *dev, u32 pd, u32 access, int max_pages, - int max_maps, u8 page_shift, struct mlx4_fmr *fmr) -{ - struct mlx4_priv *priv = mlx4_priv(dev); - u64 mtt_offset; - int err = -ENOMEM; - - if (max_maps > dev->caps.max_fmr_maps) - return -EINVAL; - - if (page_shift < (ffs(dev->caps.page_size_cap) - 1) || page_shift >= 32) - return -EINVAL; - - /* All MTTs must fit in the same page */ - if (max_pages * sizeof *fmr->mtts > PAGE_SIZE) - return -EINVAL; - - fmr->page_shift = page_shift; - fmr->max_pages = max_pages; - fmr->max_maps = max_maps; - fmr->maps = 0; - - err = mlx4_mr_alloc(dev, pd, 0, 0, access, max_pages, - page_shift, &fmr->mr); - if (err) - return err; - - mtt_offset = fmr->mr.mtt.offset * dev->caps.mtt_entry_sz; - - fmr->mtts = mlx4_table_find(&priv->mr_table.mtt_table, - fmr->mr.mtt.offset, - &fmr->dma_handle); - - if (!fmr->mtts) { - err = -ENOMEM; - goto err_free; - } - - return 0; - -err_free: - mlx4_mr_free(dev, &fmr->mr); - return err; -} -EXPORT_SYMBOL_GPL(mlx4_fmr_alloc); - -int mlx4_fmr_enable(struct mlx4_dev *dev, struct mlx4_fmr *fmr) -{ - struct mlx4_priv *priv = mlx4_priv(dev); - int err; - - err = mlx4_mr_enable(dev, &fmr->mr); - if (err) - return err; - - fmr->mpt = mlx4_table_find(&priv->mr_table.dmpt_table, - key_to_hw_index(fmr->mr.key), NULL); - if (!fmr->mpt) - return -ENOMEM; - - return 0; -} -EXPORT_SYMBOL_GPL(mlx4_fmr_enable); - -void mlx4_fmr_unmap(struct mlx4_dev *dev, struct mlx4_fmr *fmr, - u32 *lkey, u32 *rkey) -{ - struct mlx4_cmd_mailbox *mailbox; - int err; - - if (!fmr->maps) - return; - - fmr->maps = 0; - - mailbox = mlx4_alloc_cmd_mailbox(dev); - if (IS_ERR(mailbox)) { - err = PTR_ERR(mailbox); - printk(KERN_WARNING "mlx4_ib: mlx4_alloc_cmd_mailbox" - " failed (%d)\n", err); - return; - } - - err = mlx4_HW2SW_MPT(dev, NULL, - key_to_hw_index(fmr->mr.key) & - (dev->caps.num_mpts - 1)); - mlx4_free_cmd_mailbox(dev, mailbox); - if (err) { - printk(KERN_WARNING "mlx4_ib: mlx4_HW2SW_MPT failed (%d)\n", - err); - return; - } - fmr->mr.enabled = MLX4_MR_EN_SW; -} -EXPORT_SYMBOL_GPL(mlx4_fmr_unmap); - -int mlx4_fmr_free(struct mlx4_dev *dev, struct mlx4_fmr *fmr) -{ - if (fmr->maps) - return -EBUSY; - - mlx4_mr_free(dev, &fmr->mr); - fmr->mr.enabled = MLX4_MR_DISABLED; - - return 0; -} -EXPORT_SYMBOL_GPL(mlx4_fmr_free); - -int mlx4_SYNC_TPT(struct mlx4_dev *dev) -{ - return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_SYNC_TPT, 1000, - MLX4_CMD_WRAPPED); -} -EXPORT_SYMBOL_GPL(mlx4_SYNC_TPT); |