+++ /dev/null
-/*
- * 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/errno.h>
-#include <linux/mm.h>
-#include <linux/scatterlist.h>
-#include <linux/slab.h>
-
-#include <linux/mlx4/cmd.h>
-
-#include "mlx4.h"
-#include "icm.h"
-#include "fw.h"
-
-/*
- * We allocate in as big chunks as we can, up to a maximum of 256 KB
- * per chunk.
- */
-enum {
- MLX4_ICM_ALLOC_SIZE = 1 << 18,
- MLX4_TABLE_CHUNK_SIZE = 1 << 18
-};
-
-static void mlx4_free_icm_pages(struct mlx4_dev *dev, struct mlx4_icm_chunk *chunk)
-{
- int i;
-
- if (chunk->nsg > 0)
- pci_unmap_sg(dev->pdev, chunk->mem, chunk->npages,
- PCI_DMA_BIDIRECTIONAL);
-
- for (i = 0; i < chunk->npages; ++i)
- __free_pages(sg_page(&chunk->mem[i]),
- get_order(chunk->mem[i].length));
-}
-
-static void mlx4_free_icm_coherent(struct mlx4_dev *dev, struct mlx4_icm_chunk *chunk)
-{
- int i;
-
- for (i = 0; i < chunk->npages; ++i)
- dma_free_coherent(&dev->pdev->dev, chunk->mem[i].length,
- lowmem_page_address(sg_page(&chunk->mem[i])),
- sg_dma_address(&chunk->mem[i]));
-}
-
-void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm, int coherent)
-{
- struct mlx4_icm_chunk *chunk, *tmp;
-
- if (!icm)
- return;
-
- list_for_each_entry_safe(chunk, tmp, &icm->chunk_list, list) {
- if (coherent)
- mlx4_free_icm_coherent(dev, chunk);
- else
- mlx4_free_icm_pages(dev, chunk);
-
- kfree(chunk);
- }
-
- kfree(icm);
-}
-
-static int mlx4_alloc_icm_pages(struct scatterlist *mem, int order, gfp_t gfp_mask)
-{
- struct page *page;
-
- page = alloc_pages(gfp_mask, order);
- if (!page)
- return -ENOMEM;
-
- sg_set_page(mem, page, PAGE_SIZE << order, 0);
- return 0;
-}
-
-static int mlx4_alloc_icm_coherent(struct device *dev, struct scatterlist *mem,
- int order, gfp_t gfp_mask)
-{
- void *buf = dma_alloc_coherent(dev, PAGE_SIZE << order,
- &sg_dma_address(mem), gfp_mask);
- if (!buf)
- return -ENOMEM;
-
- sg_set_buf(mem, buf, PAGE_SIZE << order);
- BUG_ON(mem->offset);
- sg_dma_len(mem) = PAGE_SIZE << order;
- return 0;
-}
-
-struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages,
- gfp_t gfp_mask, int coherent)
-{
- struct mlx4_icm *icm;
- struct mlx4_icm_chunk *chunk = NULL;
- int cur_order;
- int ret;
-
- /* We use sg_set_buf for coherent allocs, which assumes low memory */
- BUG_ON(coherent && (gfp_mask & __GFP_HIGHMEM));
-
- icm = kmalloc(sizeof *icm, gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN));
- if (!icm)
- return NULL;
-
- icm->refcount = 0;
- INIT_LIST_HEAD(&icm->chunk_list);
-
- cur_order = get_order(MLX4_ICM_ALLOC_SIZE);
-
- while (npages > 0) {
- if (!chunk) {
- chunk = kmalloc(sizeof *chunk,
- gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN));
- if (!chunk)
- goto fail;
-
- sg_init_table(chunk->mem, MLX4_ICM_CHUNK_LEN);
- chunk->npages = 0;
- chunk->nsg = 0;
- list_add_tail(&chunk->list, &icm->chunk_list);
- }
-
- while (1 << cur_order > npages)
- --cur_order;
-
- if (coherent)
- ret = mlx4_alloc_icm_coherent(&dev->pdev->dev,
- &chunk->mem[chunk->npages],
- cur_order, gfp_mask);
- else
- ret = mlx4_alloc_icm_pages(&chunk->mem[chunk->npages],
- cur_order, gfp_mask);
-
- if (ret) {
- if (--cur_order < 0)
- goto fail;
- else
- continue;
- }
-
- ++chunk->npages;
-
- if (coherent)
- ++chunk->nsg;
- else if (chunk->npages == MLX4_ICM_CHUNK_LEN) {
- chunk->nsg = pci_map_sg(dev->pdev, chunk->mem,
- chunk->npages,
- PCI_DMA_BIDIRECTIONAL);
-
- if (chunk->nsg <= 0)
- goto fail;
- }
-
- if (chunk->npages == MLX4_ICM_CHUNK_LEN)
- chunk = NULL;
-
- npages -= 1 << cur_order;
- }
-
- if (!coherent && chunk) {
- chunk->nsg = pci_map_sg(dev->pdev, chunk->mem,
- chunk->npages,
- PCI_DMA_BIDIRECTIONAL);
-
- if (chunk->nsg <= 0)
- goto fail;
- }
-
- return icm;
-
-fail:
- mlx4_free_icm(dev, icm, coherent);
- return NULL;
-}
-
-static int mlx4_MAP_ICM(struct mlx4_dev *dev, struct mlx4_icm *icm, u64 virt)
-{
- return mlx4_map_cmd(dev, MLX4_CMD_MAP_ICM, icm, virt);
-}
-
-static int mlx4_UNMAP_ICM(struct mlx4_dev *dev, u64 virt, u32 page_count)
-{
- return mlx4_cmd(dev, virt, page_count, 0, MLX4_CMD_UNMAP_ICM,
- MLX4_CMD_TIME_CLASS_B);
-}
-
-int mlx4_MAP_ICM_AUX(struct mlx4_dev *dev, struct mlx4_icm *icm)
-{
- return mlx4_map_cmd(dev, MLX4_CMD_MAP_ICM_AUX, icm, -1);
-}
-
-int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev)
-{
- return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_UNMAP_ICM_AUX, MLX4_CMD_TIME_CLASS_B);
-}
-
-int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj)
-{
- int i = (obj & (table->num_obj - 1)) / (MLX4_TABLE_CHUNK_SIZE / table->obj_size);
- int ret = 0;
-
- mutex_lock(&table->mutex);
-
- if (table->icm[i]) {
- ++table->icm[i]->refcount;
- goto out;
- }
-
- table->icm[i] = mlx4_alloc_icm(dev, MLX4_TABLE_CHUNK_SIZE >> PAGE_SHIFT,
- (table->lowmem ? GFP_KERNEL : GFP_HIGHUSER) |
- __GFP_NOWARN, table->coherent);
- if (!table->icm[i]) {
- ret = -ENOMEM;
- goto out;
- }
-
- if (mlx4_MAP_ICM(dev, table->icm[i], table->virt +
- (u64) i * MLX4_TABLE_CHUNK_SIZE)) {
- mlx4_free_icm(dev, table->icm[i], table->coherent);
- table->icm[i] = NULL;
- ret = -ENOMEM;
- goto out;
- }
-
- ++table->icm[i]->refcount;
-
-out:
- mutex_unlock(&table->mutex);
- return ret;
-}
-
-void mlx4_table_put(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj)
-{
- int i;
-
- i = (obj & (table->num_obj - 1)) / (MLX4_TABLE_CHUNK_SIZE / table->obj_size);
-
- mutex_lock(&table->mutex);
-
- if (--table->icm[i]->refcount == 0) {
- mlx4_UNMAP_ICM(dev, table->virt + i * MLX4_TABLE_CHUNK_SIZE,
- MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE);
- mlx4_free_icm(dev, table->icm[i], table->coherent);
- table->icm[i] = NULL;
- }
-
- mutex_unlock(&table->mutex);
-}
-
-void *mlx4_table_find(struct mlx4_icm_table *table, int obj, dma_addr_t *dma_handle)
-{
- int idx, offset, dma_offset, i;
- struct mlx4_icm_chunk *chunk;
- struct mlx4_icm *icm;
- struct page *page = NULL;
-
- if (!table->lowmem)
- return NULL;
-
- mutex_lock(&table->mutex);
-
- idx = (obj & (table->num_obj - 1)) * table->obj_size;
- icm = table->icm[idx / MLX4_TABLE_CHUNK_SIZE];
- dma_offset = offset = idx % MLX4_TABLE_CHUNK_SIZE;
-
- if (!icm)
- goto out;
-
- list_for_each_entry(chunk, &icm->chunk_list, list) {
- for (i = 0; i < chunk->npages; ++i) {
- if (dma_handle && dma_offset >= 0) {
- if (sg_dma_len(&chunk->mem[i]) > dma_offset)
- *dma_handle = sg_dma_address(&chunk->mem[i]) +
- dma_offset;
- dma_offset -= sg_dma_len(&chunk->mem[i]);
- }
- /*
- * DMA mapping can merge pages but not split them,
- * so if we found the page, dma_handle has already
- * been assigned to.
- */
- if (chunk->mem[i].length > offset) {
- page = sg_page(&chunk->mem[i]);
- goto out;
- }
- offset -= chunk->mem[i].length;
- }
- }
-
-out:
- mutex_unlock(&table->mutex);
- return page ? lowmem_page_address(page) + offset : NULL;
-}
-
-int mlx4_table_get_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
- int start, int end)
-{
- int inc = MLX4_TABLE_CHUNK_SIZE / table->obj_size;
- int i, err;
-
- for (i = start; i <= end; i += inc) {
- err = mlx4_table_get(dev, table, i);
- if (err)
- goto fail;
- }
-
- return 0;
-
-fail:
- while (i > start) {
- i -= inc;
- mlx4_table_put(dev, table, i);
- }
-
- return err;
-}
-
-void mlx4_table_put_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
- int start, int end)
-{
- int i;
-
- for (i = start; i <= end; i += MLX4_TABLE_CHUNK_SIZE / table->obj_size)
- mlx4_table_put(dev, table, i);
-}
-
-int mlx4_init_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table,
- u64 virt, int obj_size, int nobj, int reserved,
- int use_lowmem, int use_coherent)
-{
- int obj_per_chunk;
- int num_icm;
- unsigned chunk_size;
- int i;
-
- obj_per_chunk = MLX4_TABLE_CHUNK_SIZE / obj_size;
- num_icm = (nobj + obj_per_chunk - 1) / obj_per_chunk;
-
- table->icm = kcalloc(num_icm, sizeof *table->icm, GFP_KERNEL);
- if (!table->icm)
- return -ENOMEM;
- table->virt = virt;
- table->num_icm = num_icm;
- table->num_obj = nobj;
- table->obj_size = obj_size;
- table->lowmem = use_lowmem;
- table->coherent = use_coherent;
- mutex_init(&table->mutex);
-
- for (i = 0; i * MLX4_TABLE_CHUNK_SIZE < reserved * obj_size; ++i) {
- chunk_size = MLX4_TABLE_CHUNK_SIZE;
- if ((i + 1) * MLX4_TABLE_CHUNK_SIZE > nobj * obj_size)
- chunk_size = PAGE_ALIGN(nobj * obj_size - i * MLX4_TABLE_CHUNK_SIZE);
-
- table->icm[i] = mlx4_alloc_icm(dev, chunk_size >> PAGE_SHIFT,
- (use_lowmem ? GFP_KERNEL : GFP_HIGHUSER) |
- __GFP_NOWARN, use_coherent);
- if (!table->icm[i])
- goto err;
- if (mlx4_MAP_ICM(dev, table->icm[i], virt + i * MLX4_TABLE_CHUNK_SIZE)) {
- mlx4_free_icm(dev, table->icm[i], use_coherent);
- table->icm[i] = NULL;
- goto err;
- }
-
- /*
- * Add a reference to this ICM chunk so that it never
- * gets freed (since it contains reserved firmware objects).
- */
- ++table->icm[i]->refcount;
- }
-
- return 0;
-
-err:
- for (i = 0; i < num_icm; ++i)
- if (table->icm[i]) {
- mlx4_UNMAP_ICM(dev, virt + i * MLX4_TABLE_CHUNK_SIZE,
- MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE);
- mlx4_free_icm(dev, table->icm[i], use_coherent);
- }
-
- return -ENOMEM;
-}
-
-void mlx4_cleanup_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table)
-{
- int i;
-
- for (i = 0; i < table->num_icm; ++i)
- if (table->icm[i]) {
- mlx4_UNMAP_ICM(dev, table->virt + i * MLX4_TABLE_CHUNK_SIZE,
- MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE);
- mlx4_free_icm(dev, table->icm[i], table->coherent);
- }
-
- kfree(table->icm);
-}
git.openpandora.org / pandora-kernel.git / blobdiff