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crypto: hisilicon - fix large sgl memory allocation problem when disable smmu

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When disabling SMMU, it may fail to allocate large continuous memory. This
patch fixes this by allocating memory as blocks.

Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Shukun Tan <tanshukun1@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Zhou Wang 2019-09-30 15:08:54 +08:00 committed by Herbert Xu
parent f081fda293
commit d8ac7b8523
1 changed files with 68 additions and 15 deletions
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83
drivers/crypto/hisilicon/sgl.c
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@ -8,6 +8,7 @@
#define HISI_ACC_SGL_SGE_NR_MIN 1
#define HISI_ACC_SGL_NR_MAX 256
#define HISI_ACC_SGL_ALIGN_SIZE 64
#define HISI_ACC_MEM_BLOCK_NR 5
struct acc_hw_sge {
dma_addr_t buf;
@ -31,9 +32,13 @@ struct hisi_acc_hw_sgl {
} __aligned(1);
struct hisi_acc_sgl_pool {
struct hisi_acc_hw_sgl *sgl;
dma_addr_t sgl_dma;
size_t size;
struct mem_block {
struct hisi_acc_hw_sgl *sgl;
dma_addr_t sgl_dma;
size_t size;
} mem_block[HISI_ACC_MEM_BLOCK_NR];
u32 sgl_num_per_block;
u32 block_num;
u32 count;
u32 sge_nr;
size_t sgl_size;
@ -51,33 +56,66 @@ struct hisi_acc_sgl_pool {
struct hisi_acc_sgl_pool *hisi_acc_create_sgl_pool(struct device *dev,
u32 count, u32 sge_nr)
{
u32 sgl_size, block_size, sgl_num_per_block, block_num, remain_sgl = 0;
struct hisi_acc_sgl_pool *pool;
u32 sgl_size;
u32 size;
struct mem_block *block;
u32 i, j;
if (!dev || !count || !sge_nr || sge_nr > HISI_ACC_SGL_SGE_NR_MAX)
return ERR_PTR(-EINVAL);
sgl_size = sizeof(struct acc_hw_sge) * sge_nr +
sizeof(struct hisi_acc_hw_sgl);
size = sgl_size * count;
block_size = PAGE_SIZE * (1 << (MAX_ORDER - 1));
sgl_num_per_block = block_size / sgl_size;
block_num = count / sgl_num_per_block;
remain_sgl = count % sgl_num_per_block;
if ((!remain_sgl && block_num > HISI_ACC_MEM_BLOCK_NR) ||
(remain_sgl > 0 && block_num > HISI_ACC_MEM_BLOCK_NR - 1))
return ERR_PTR(-EINVAL);
pool = kzalloc(sizeof(*pool), GFP_KERNEL);
if (!pool)
return ERR_PTR(-ENOMEM);
block = pool->mem_block;
pool->sgl = dma_alloc_coherent(dev, size, &pool->sgl_dma, GFP_KERNEL);
if (!pool->sgl) {
kfree(pool);
return ERR_PTR(-ENOMEM);
for (i = 0; i < block_num; i++) {
block[i].sgl = dma_alloc_coherent(dev, block_size,
&block[i].sgl_dma,
GFP_KERNEL);
if (!block[i].sgl)
goto err_free_mem;
block[i].size = block_size;
}
pool->size = size;
if (remain_sgl > 0) {
block[i].sgl = dma_alloc_coherent(dev, remain_sgl * sgl_size,
&block[i].sgl_dma,
GFP_KERNEL);
if (!block[i].sgl)
goto err_free_mem;
block[i].size = remain_sgl * sgl_size;
}
pool->sgl_num_per_block = sgl_num_per_block;
pool->block_num = remain_sgl ? block_num + 1 : block_num;
pool->count = count;
pool->sgl_size = sgl_size;
pool->sge_nr = sge_nr;
return pool;
err_free_mem:
for (j = 0; j < i; j++) {
dma_free_coherent(dev, block_size, block[j].sgl,
block[j].sgl_dma);
memset(block + j, 0, sizeof(*block));
}
kfree(pool);
return ERR_PTR(-ENOMEM);
}
EXPORT_SYMBOL_GPL(hisi_acc_create_sgl_pool);
@ -90,10 +128,18 @@ EXPORT_SYMBOL_GPL(hisi_acc_create_sgl_pool);
*/
void hisi_acc_free_sgl_pool(struct device *dev, struct hisi_acc_sgl_pool *pool)
{
struct mem_block *block;
int i;
if (!dev || !pool)
return;
dma_free_coherent(dev, pool->size, pool->sgl, pool->sgl_dma);
block = pool->mem_block;
for (i = 0; i < pool->block_num; i++)
dma_free_coherent(dev, block[i].size, block[i].sgl,
block[i].sgl_dma);
kfree(pool);
}
EXPORT_SYMBOL_GPL(hisi_acc_free_sgl_pool);
@ -101,11 +147,18 @@ EXPORT_SYMBOL_GPL(hisi_acc_free_sgl_pool);
struct hisi_acc_hw_sgl *acc_get_sgl(struct hisi_acc_sgl_pool *pool, u32 index,
dma_addr_t *hw_sgl_dma)
{
if (!pool || !hw_sgl_dma || index >= pool->count || !pool->sgl)
struct mem_block *block;
u32 block_index, offset;
if (!pool || !hw_sgl_dma || index >= pool->count)
return ERR_PTR(-EINVAL);
*hw_sgl_dma = pool->sgl_dma + pool->sgl_size * index;
return (void *)pool->sgl + pool->sgl_size * index;
block = pool->mem_block;
block_index = index / pool->sgl_num_per_block;
offset = index % pool->sgl_num_per_block;
*hw_sgl_dma = block[block_index].sgl_dma + pool->sgl_size * offset;
return (void *)block[block_index].sgl + pool->sgl_size * offset;
}
void acc_put_sgl(struct hisi_acc_sgl_pool *pool, u32 index) {}