494 lines
12 KiB
C
494 lines
12 KiB
C
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/*
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* Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/errno.h>
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#include <linux/mm.h>
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#include <linux/scatterlist.h>
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#include <linux/slab.h>
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#include <linux/mlx4/cmd.h>
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#include "mlx4.h"
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#include "icm.h"
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#include "fw.h"
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/*
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* We allocate in as big chunks as we can, up to a maximum of 256 KB
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* per chunk. Note that the chunks are not necessarily in contiguous
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* physical memory.
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*/
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enum {
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MLX4_ICM_ALLOC_SIZE = 1 << 18,
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MLX4_TABLE_CHUNK_SIZE = 1 << 18,
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};
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static void mlx4_free_icm_pages(struct mlx4_dev *dev, struct mlx4_icm_chunk *chunk)
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{
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int i;
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if (chunk->nsg > 0)
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dma_unmap_sg(&dev->persist->pdev->dev, chunk->sg, chunk->npages,
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DMA_BIDIRECTIONAL);
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for (i = 0; i < chunk->npages; ++i)
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__free_pages(sg_page(&chunk->sg[i]),
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get_order(chunk->sg[i].length));
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}
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static void mlx4_free_icm_coherent(struct mlx4_dev *dev, struct mlx4_icm_chunk *chunk)
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{
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int i;
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for (i = 0; i < chunk->npages; ++i)
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dma_free_coherent(&dev->persist->pdev->dev,
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chunk->buf[i].size,
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chunk->buf[i].addr,
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chunk->buf[i].dma_addr);
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}
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void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm, int coherent)
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{
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struct mlx4_icm_chunk *chunk, *tmp;
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if (!icm)
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return;
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list_for_each_entry_safe(chunk, tmp, &icm->chunk_list, list) {
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if (coherent)
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mlx4_free_icm_coherent(dev, chunk);
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else
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mlx4_free_icm_pages(dev, chunk);
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kfree(chunk);
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}
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kfree(icm);
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}
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static int mlx4_alloc_icm_pages(struct scatterlist *mem, int order,
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gfp_t gfp_mask, int node)
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{
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struct page *page;
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page = alloc_pages_node(node, gfp_mask, order);
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if (!page) {
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page = alloc_pages(gfp_mask, order);
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if (!page)
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return -ENOMEM;
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}
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sg_set_page(mem, page, PAGE_SIZE << order, 0);
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return 0;
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}
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static int mlx4_alloc_icm_coherent(struct device *dev, struct mlx4_icm_buf *buf,
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int order, gfp_t gfp_mask)
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{
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buf->addr = dma_alloc_coherent(dev, PAGE_SIZE << order,
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&buf->dma_addr, gfp_mask);
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if (!buf->addr)
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return -ENOMEM;
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if (offset_in_page(buf->addr)) {
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dma_free_coherent(dev, PAGE_SIZE << order, buf->addr,
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buf->dma_addr);
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return -ENOMEM;
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}
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buf->size = PAGE_SIZE << order;
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return 0;
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}
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struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages,
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gfp_t gfp_mask, int coherent)
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{
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struct mlx4_icm *icm;
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struct mlx4_icm_chunk *chunk = NULL;
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int cur_order;
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gfp_t mask;
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int ret;
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/* We use sg_set_buf for coherent allocs, which assumes low memory */
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BUG_ON(coherent && (gfp_mask & __GFP_HIGHMEM));
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icm = kmalloc_node(sizeof(*icm),
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gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN),
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dev->numa_node);
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if (!icm) {
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icm = kmalloc(sizeof(*icm),
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gfp_mask & ~(__GFP_HIGHMEM | __GFP_NOWARN));
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if (!icm)
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return NULL;
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}
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icm->refcount = 0;
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INIT_LIST_HEAD(&icm->chunk_list);
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cur_order = get_order(MLX4_ICM_ALLOC_SIZE);
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while (npages > 0) {
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if (!chunk) {
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chunk = kzalloc_node(sizeof(*chunk),
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gfp_mask & ~(__GFP_HIGHMEM |
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__GFP_NOWARN),
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dev->numa_node);
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if (!chunk) {
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chunk = kzalloc(sizeof(*chunk),
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gfp_mask & ~(__GFP_HIGHMEM |
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__GFP_NOWARN));
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if (!chunk)
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goto fail;
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}
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chunk->coherent = coherent;
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if (!coherent)
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sg_init_table(chunk->sg, MLX4_ICM_CHUNK_LEN);
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list_add_tail(&chunk->list, &icm->chunk_list);
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}
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while (1 << cur_order > npages)
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--cur_order;
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mask = gfp_mask;
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if (cur_order)
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mask &= ~__GFP_DIRECT_RECLAIM;
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if (coherent)
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ret = mlx4_alloc_icm_coherent(&dev->persist->pdev->dev,
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&chunk->buf[chunk->npages],
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cur_order, mask);
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else
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ret = mlx4_alloc_icm_pages(&chunk->sg[chunk->npages],
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cur_order, mask,
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dev->numa_node);
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if (ret) {
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if (--cur_order < 0)
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goto fail;
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else
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continue;
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}
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++chunk->npages;
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if (coherent)
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++chunk->nsg;
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else if (chunk->npages == MLX4_ICM_CHUNK_LEN) {
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chunk->nsg = dma_map_sg(&dev->persist->pdev->dev,
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chunk->sg, chunk->npages,
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DMA_BIDIRECTIONAL);
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if (chunk->nsg <= 0)
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goto fail;
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}
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if (chunk->npages == MLX4_ICM_CHUNK_LEN)
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chunk = NULL;
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npages -= 1 << cur_order;
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}
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if (!coherent && chunk) {
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chunk->nsg = dma_map_sg(&dev->persist->pdev->dev, chunk->sg,
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chunk->npages, DMA_BIDIRECTIONAL);
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if (chunk->nsg <= 0)
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goto fail;
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}
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return icm;
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fail:
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mlx4_free_icm(dev, icm, coherent);
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return NULL;
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}
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static int mlx4_MAP_ICM(struct mlx4_dev *dev, struct mlx4_icm *icm, u64 virt)
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{
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return mlx4_map_cmd(dev, MLX4_CMD_MAP_ICM, icm, virt);
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}
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static int mlx4_UNMAP_ICM(struct mlx4_dev *dev, u64 virt, u32 page_count)
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{
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return mlx4_cmd(dev, virt, page_count, 0, MLX4_CMD_UNMAP_ICM,
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MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
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}
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int mlx4_MAP_ICM_AUX(struct mlx4_dev *dev, struct mlx4_icm *icm)
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{
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return mlx4_map_cmd(dev, MLX4_CMD_MAP_ICM_AUX, icm, -1);
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}
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int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev)
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{
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return mlx4_cmd(dev, 0, 0, 0, MLX4_CMD_UNMAP_ICM_AUX,
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MLX4_CMD_TIME_CLASS_B, MLX4_CMD_NATIVE);
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}
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int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj)
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{
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u32 i = (obj & (table->num_obj - 1)) /
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(MLX4_TABLE_CHUNK_SIZE / table->obj_size);
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int ret = 0;
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mutex_lock(&table->mutex);
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if (table->icm[i]) {
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++table->icm[i]->refcount;
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goto out;
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}
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table->icm[i] = mlx4_alloc_icm(dev, MLX4_TABLE_CHUNK_SIZE >> PAGE_SHIFT,
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(table->lowmem ? GFP_KERNEL : GFP_HIGHUSER) |
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__GFP_NOWARN, table->coherent);
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if (!table->icm[i]) {
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ret = -ENOMEM;
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goto out;
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}
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if (mlx4_MAP_ICM(dev, table->icm[i], table->virt +
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(u64) i * MLX4_TABLE_CHUNK_SIZE)) {
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mlx4_free_icm(dev, table->icm[i], table->coherent);
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table->icm[i] = NULL;
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ret = -ENOMEM;
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goto out;
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}
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++table->icm[i]->refcount;
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out:
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mutex_unlock(&table->mutex);
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return ret;
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}
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void mlx4_table_put(struct mlx4_dev *dev, struct mlx4_icm_table *table, u32 obj)
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{
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u32 i;
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u64 offset;
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i = (obj & (table->num_obj - 1)) / (MLX4_TABLE_CHUNK_SIZE / table->obj_size);
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mutex_lock(&table->mutex);
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if (--table->icm[i]->refcount == 0) {
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offset = (u64) i * MLX4_TABLE_CHUNK_SIZE;
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mlx4_UNMAP_ICM(dev, table->virt + offset,
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MLX4_TABLE_CHUNK_SIZE / MLX4_ICM_PAGE_SIZE);
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mlx4_free_icm(dev, table->icm[i], table->coherent);
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table->icm[i] = NULL;
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}
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mutex_unlock(&table->mutex);
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}
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void *mlx4_table_find(struct mlx4_icm_table *table, u32 obj,
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dma_addr_t *dma_handle)
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{
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int offset, dma_offset, i;
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u64 idx;
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struct mlx4_icm_chunk *chunk;
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struct mlx4_icm *icm;
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void *addr = NULL;
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if (!table->lowmem)
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return NULL;
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mutex_lock(&table->mutex);
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idx = (u64) (obj & (table->num_obj - 1)) * table->obj_size;
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icm = table->icm[idx / MLX4_TABLE_CHUNK_SIZE];
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dma_offset = offset = idx % MLX4_TABLE_CHUNK_SIZE;
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if (!icm)
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goto out;
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list_for_each_entry(chunk, &icm->chunk_list, list) {
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for (i = 0; i < chunk->npages; ++i) {
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dma_addr_t dma_addr;
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size_t len;
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if (table->coherent) {
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len = chunk->buf[i].size;
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dma_addr = chunk->buf[i].dma_addr;
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addr = chunk->buf[i].addr;
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} else {
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struct page *page;
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len = sg_dma_len(&chunk->sg[i]);
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dma_addr = sg_dma_address(&chunk->sg[i]);
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/* XXX: we should never do this for highmem
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* allocation. This function either needs
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* to be split, or the kernel virtual address
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* return needs to be made optional.
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*/
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page = sg_page(&chunk->sg[i]);
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addr = lowmem_page_address(page);
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}
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if (dma_handle && dma_offset >= 0) {
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if (len > dma_offset)
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*dma_handle = dma_addr + dma_offset;
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dma_offset -= len;
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}
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/*
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* DMA mapping can merge pages but not split them,
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|
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* so if we found the page, dma_handle has already
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* been assigned to.
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*/
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if (len > offset)
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goto out;
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offset -= len;
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}
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}
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|
|
addr = NULL;
|
||
|
|
out:
|
||
|
|
mutex_unlock(&table->mutex);
|
||
|
|
return addr ? addr + offset : NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
int mlx4_table_get_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
|
||
|
|
u32 start, u32 end)
|
||
|
|
{
|
||
|
|
int inc = MLX4_TABLE_CHUNK_SIZE / table->obj_size;
|
||
|
|
int err;
|
||
|
|
u32 i;
|
||
|
|
|
||
|
|
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,
|
||
|
|
u32 start, u32 end)
|
||
|
|
{
|
||
|
|
u32 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, u32 nobj, int reserved,
|
||
|
|
int use_lowmem, int use_coherent)
|
||
|
|
{
|
||
|
|
int obj_per_chunk;
|
||
|
|
int num_icm;
|
||
|
|
unsigned chunk_size;
|
||
|
|
int i;
|
||
|
|
u64 size;
|
||
|
|
|
||
|
|
obj_per_chunk = MLX4_TABLE_CHUNK_SIZE / obj_size;
|
||
|
|
if (WARN_ON(!obj_per_chunk))
|
||
|
|
return -EINVAL;
|
||
|
|
num_icm = DIV_ROUND_UP(nobj, obj_per_chunk);
|
||
|
|
|
||
|
|
table->icm = kvcalloc(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);
|
||
|
|
|
||
|
|
size = (u64) nobj * obj_size;
|
||
|
|
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 > size)
|
||
|
|
chunk_size = PAGE_ALIGN(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);
|
||
|
|
}
|
||
|
|
|
||
|
|
kvfree(table->icm);
|
||
|
|
|
||
|
|
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);
|
||
|
|
}
|
||
|
|
|
||
|
|
kvfree(table->icm);
|
||
|
|
}
|