X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=drivers%2Fnet%2Fmlx4%2Ficm.c;h=250e2488757880ada43cdc3d68a983f90823b83b;hp=b7a4aa8476fb48b095819276b4e6732fe7e83ac4;hb=5b0bf5e25efe;hpb=5b58e21a27028a9f0399449d8bc8494fd9d9ff70 diff --git a/drivers/net/mlx4/icm.c b/drivers/net/mlx4/icm.c index b7a4aa8476fb..250e24887578 100644 --- a/drivers/net/mlx4/icm.c +++ b/drivers/net/mlx4/icm.c @@ -34,6 +34,7 @@ #include #include #include +#include #include @@ -50,19 +51,41 @@ enum { MLX4_TABLE_CHUNK_SIZE = 1 << 18 }; -void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm) +static void mlx4_free_icm_pages(struct mlx4_dev *dev, struct mlx4_icm_chunk *chunk) { - struct mlx4_icm_chunk *chunk, *tmp; int i; - list_for_each_entry_safe(chunk, tmp, &icm->chunk_list, list) { - if (chunk->nsg > 0) - pci_unmap_sg(dev->pdev, chunk->mem, chunk->npages, - PCI_DMA_BIDIRECTIONAL); + 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(chunk->mem[i].page, + get_order(chunk->mem[i].length)); +} - for (i = 0; i < chunk->npages; ++i) - __free_pages(chunk->mem[i].page, - 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(chunk->mem[i].page), + 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); } @@ -70,16 +93,45 @@ void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm) kfree(icm); } +static int mlx4_alloc_icm_pages(struct scatterlist *mem, int order, gfp_t gfp_mask) +{ + mem->page = alloc_pages(gfp_mask, order); + if (!mem->page) + return -ENOMEM; + + mem->length = PAGE_SIZE << order; + mem->offset = 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) + 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 icm; + return NULL; icm->refcount = 0; INIT_LIST_HEAD(&icm->chunk_list); @@ -101,12 +153,20 @@ struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages, while (1 << cur_order > npages) --cur_order; - chunk->mem[chunk->npages].page = alloc_pages(gfp_mask, cur_order); - if (chunk->mem[chunk->npages].page) { - chunk->mem[chunk->npages].length = PAGE_SIZE << cur_order; - chunk->mem[chunk->npages].offset = 0; + 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) { + ++chunk->npages; - if (++chunk->npages == MLX4_ICM_CHUNK_LEN) { + 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); @@ -125,7 +185,7 @@ struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages, } } - if (chunk) { + if (!coherent && chunk) { chunk->nsg = pci_map_sg(dev->pdev, chunk->mem, chunk->npages, PCI_DMA_BIDIRECTIONAL); @@ -137,7 +197,7 @@ struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages, return icm; fail: - mlx4_free_icm(dev, icm); + mlx4_free_icm(dev, icm, coherent); return NULL; } @@ -202,7 +262,7 @@ int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj) table->icm[i] = mlx4_alloc_icm(dev, MLX4_TABLE_CHUNK_SIZE >> PAGE_SHIFT, (table->lowmem ? GFP_KERNEL : GFP_HIGHUSER) | - __GFP_NOWARN); + __GFP_NOWARN, table->coherent); if (!table->icm[i]) { ret = -ENOMEM; goto out; @@ -210,7 +270,7 @@ int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj) if (mlx4_MAP_ICM(dev, table->icm[i], table->virt + (u64) i * MLX4_TABLE_CHUNK_SIZE)) { - mlx4_free_icm(dev, table->icm[i]); + mlx4_free_icm(dev, table->icm[i], table->coherent); table->icm[i] = NULL; ret = -ENOMEM; goto out; @@ -234,7 +294,7 @@ void mlx4_table_put(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj) 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]); + mlx4_free_icm(dev, table->icm[i], table->coherent); table->icm[i] = NULL; } @@ -309,7 +369,7 @@ void mlx4_table_put_range(struct mlx4_dev *dev, struct mlx4_icm_table *table, 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_lowmem, int use_coherent) { int obj_per_chunk; int num_icm; @@ -327,6 +387,7 @@ int mlx4_init_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table, 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) { @@ -336,11 +397,11 @@ int mlx4_init_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table, table->icm[i] = mlx4_alloc_icm(dev, chunk_size >> PAGE_SHIFT, (use_lowmem ? GFP_KERNEL : GFP_HIGHUSER) | - __GFP_NOWARN); + __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]); + mlx4_free_icm(dev, table->icm[i], use_coherent); table->icm[i] = NULL; goto err; } @@ -359,7 +420,7 @@ err: 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]); + mlx4_free_icm(dev, table->icm[i], use_coherent); } return -ENOMEM; @@ -373,7 +434,7 @@ void mlx4_cleanup_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table) 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]); + mlx4_free_icm(dev, table->icm[i], table->coherent); } kfree(table->icm);