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Subject[PATCH v2 05/27] staging: ccree: pick alloc mem flags based on req flags
Date
The ccree driver was allocating memory using GFP_KERNEL flag
always, ignoring the flags set in the crypto request. Fix it
by choosing gfp flags based on crypto request flags.

Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
---
drivers/staging/ccree/ssi_buffer_mgr.c | 19 +++++++------
drivers/staging/ccree/ssi_buffer_mgr.h | 6 ++--
drivers/staging/ccree/ssi_cipher.c | 8 ++++--
drivers/staging/ccree/ssi_driver.h | 6 ++++
drivers/staging/ccree/ssi_hash.c | 50 ++++++++++++++++++++--------------
5 files changed, 54 insertions(+), 35 deletions(-)

diff --git a/drivers/staging/ccree/ssi_buffer_mgr.c b/drivers/staging/ccree/ssi_buffer_mgr.c
index 60fcee4..5e3cff3 100644
--- a/drivers/staging/ccree/ssi_buffer_mgr.c
+++ b/drivers/staging/ccree/ssi_buffer_mgr.c
@@ -217,7 +217,7 @@ static int cc_render_sg_to_mlli(struct device *dev, struct scatterlist *sgl,
}

static int cc_generate_mlli(struct device *dev, struct buffer_array *sg_data,
- struct mlli_params *mlli_params)
+ struct mlli_params *mlli_params, gfp_t flags)
{
u32 *mlli_p;
u32 total_nents = 0, prev_total_nents = 0;
@@ -227,7 +227,7 @@ static int cc_generate_mlli(struct device *dev, struct buffer_array *sg_data,

/* Allocate memory from the pointed pool */
mlli_params->mlli_virt_addr =
- dma_pool_alloc(mlli_params->curr_pool, GFP_KERNEL,
+ dma_pool_alloc(mlli_params->curr_pool, flags,
&mlli_params->mlli_dma_addr);
if (!mlli_params->mlli_virt_addr) {
dev_err(dev, "dma_pool_alloc() failed\n");
@@ -483,7 +483,7 @@ void cc_unmap_blkcipher_request(struct device *dev, void *ctx,
int cc_map_blkcipher_request(struct cc_drvdata *drvdata, void *ctx,
unsigned int ivsize, unsigned int nbytes,
void *info, struct scatterlist *src,
- struct scatterlist *dst)
+ struct scatterlist *dst, gfp_t flags)
{
struct blkcipher_req_ctx *req_ctx = (struct blkcipher_req_ctx *)ctx;
struct mlli_params *mlli_params = &req_ctx->mlli_params;
@@ -558,7 +558,7 @@ int cc_map_blkcipher_request(struct cc_drvdata *drvdata, void *ctx,

if (req_ctx->dma_buf_type == CC_DMA_BUF_MLLI) {
mlli_params->curr_pool = buff_mgr->mlli_buffs_pool;
- rc = cc_generate_mlli(dev, &sg_data, mlli_params);
+ rc = cc_generate_mlli(dev, &sg_data, mlli_params, flags);
if (rc)
goto ablkcipher_exit;
}
@@ -1200,6 +1200,7 @@ int cc_map_aead_request(struct cc_drvdata *drvdata, struct aead_request *req)
u32 mapped_nents = 0;
u32 dummy = 0; /*used for the assoc data fragments */
u32 size_to_map = 0;
+ gfp_t flags = cc_gfp_flags(&req->base);

mlli_params->curr_pool = NULL;
sg_data.num_of_buffers = 0;
@@ -1366,7 +1367,7 @@ int cc_map_aead_request(struct cc_drvdata *drvdata, struct aead_request *req)
if (areq_ctx->assoc_buff_type == CC_DMA_BUF_MLLI ||
areq_ctx->data_buff_type == CC_DMA_BUF_MLLI) {
mlli_params->curr_pool = buff_mgr->mlli_buffs_pool;
- rc = cc_generate_mlli(dev, &sg_data, mlli_params);
+ rc = cc_generate_mlli(dev, &sg_data, mlli_params, flags);
if (rc)
goto aead_map_failure;

@@ -1385,7 +1386,7 @@ int cc_map_aead_request(struct cc_drvdata *drvdata, struct aead_request *req)

int cc_map_hash_request_final(struct cc_drvdata *drvdata, void *ctx,
struct scatterlist *src, unsigned int nbytes,
- bool do_update)
+ bool do_update, gfp_t flags)
{
struct ahash_req_ctx *areq_ctx = (struct ahash_req_ctx *)ctx;
struct device *dev = drvdata_to_dev(drvdata);
@@ -1445,7 +1446,7 @@ int cc_map_hash_request_final(struct cc_drvdata *drvdata, void *ctx,
/* add the src data to the sg_data */
cc_add_sg_entry(dev, &sg_data, areq_ctx->in_nents, src, nbytes,
0, true, &areq_ctx->mlli_nents);
- if (cc_generate_mlli(dev, &sg_data, mlli_params))
+ if (cc_generate_mlli(dev, &sg_data, mlli_params, flags))
goto fail_unmap_din;
}
/* change the buffer index for the unmap function */
@@ -1466,7 +1467,7 @@ int cc_map_hash_request_final(struct cc_drvdata *drvdata, void *ctx,

int cc_map_hash_request_update(struct cc_drvdata *drvdata, void *ctx,
struct scatterlist *src, unsigned int nbytes,
- unsigned int block_size)
+ unsigned int block_size, gfp_t flags)
{
struct ahash_req_ctx *areq_ctx = (struct ahash_req_ctx *)ctx;
struct device *dev = drvdata_to_dev(drvdata);
@@ -1562,7 +1563,7 @@ int cc_map_hash_request_update(struct cc_drvdata *drvdata, void *ctx,
cc_add_sg_entry(dev, &sg_data, areq_ctx->in_nents, src,
(update_data_len - *curr_buff_cnt), 0, true,
&areq_ctx->mlli_nents);
- if (cc_generate_mlli(dev, &sg_data, mlli_params))
+ if (cc_generate_mlli(dev, &sg_data, mlli_params, flags))
goto fail_unmap_din;
}
areq_ctx->buff_index = (areq_ctx->buff_index ^ swap_index);
diff --git a/drivers/staging/ccree/ssi_buffer_mgr.h b/drivers/staging/ccree/ssi_buffer_mgr.h
index a9c0b2e..8f238c0 100644
--- a/drivers/staging/ccree/ssi_buffer_mgr.h
+++ b/drivers/staging/ccree/ssi_buffer_mgr.h
@@ -43,7 +43,7 @@ int cc_buffer_mgr_fini(struct cc_drvdata *drvdata);
int cc_map_blkcipher_request(struct cc_drvdata *drvdata, void *ctx,
unsigned int ivsize, unsigned int nbytes,
void *info, struct scatterlist *src,
- struct scatterlist *dst);
+ struct scatterlist *dst, gfp_t flags);

void cc_unmap_blkcipher_request(struct device *dev, void *ctx,
unsigned int ivsize,
@@ -56,11 +56,11 @@ void cc_unmap_aead_request(struct device *dev, struct aead_request *req);

int cc_map_hash_request_final(struct cc_drvdata *drvdata, void *ctx,
struct scatterlist *src, unsigned int nbytes,
- bool do_update);
+ bool do_update, gfp_t flags);

int cc_map_hash_request_update(struct cc_drvdata *drvdata, void *ctx,
struct scatterlist *src, unsigned int nbytes,
- unsigned int block_size);
+ unsigned int block_size, gfp_t flags);

void cc_unmap_hash_request(struct device *dev, void *ctx,
struct scatterlist *src, bool do_revert);
diff --git a/drivers/staging/ccree/ssi_cipher.c b/drivers/staging/ccree/ssi_cipher.c
index 479186f..fe8d78d 100644
--- a/drivers/staging/ccree/ssi_cipher.c
+++ b/drivers/staging/ccree/ssi_cipher.c
@@ -639,6 +639,7 @@ static int cc_cipher_process(struct ablkcipher_request *req,
struct cc_hw_desc desc[MAX_ABLKCIPHER_SEQ_LEN];
struct cc_crypto_req cc_req = {};
int rc, seq_len = 0, cts_restore_flag = 0;
+ gfp_t flags = cc_gfp_flags(&req->base);

dev_dbg(dev, "%s req=%p info=%p nbytes=%d\n",
((direction == DRV_CRYPTO_DIRECTION_ENCRYPT) ?
@@ -662,7 +663,7 @@ static int cc_cipher_process(struct ablkcipher_request *req,
/* The IV we are handed may be allocted from the stack so
* we must copy it to a DMAable buffer before use.
*/
- req_ctx->iv = kmalloc(ivsize, GFP_KERNEL);
+ req_ctx->iv = kmalloc(ivsize, flags);
if (!req_ctx->iv) {
rc = -ENOMEM;
goto exit_process;
@@ -692,7 +693,7 @@ static int cc_cipher_process(struct ablkcipher_request *req,
/* STAT_PHASE_1: Map buffers */

rc = cc_map_blkcipher_request(ctx_p->drvdata, req_ctx, ivsize, nbytes,
- req_ctx->iv, src, dst);
+ req_ctx->iv, src, dst, flags);
if (rc) {
dev_err(dev, "map_request() failed\n");
goto exit_process;
@@ -751,12 +752,13 @@ static int cc_cipher_decrypt(struct ablkcipher_request *req)
struct crypto_ablkcipher *ablk_tfm = crypto_ablkcipher_reqtfm(req);
struct blkcipher_req_ctx *req_ctx = ablkcipher_request_ctx(req);
unsigned int ivsize = crypto_ablkcipher_ivsize(ablk_tfm);
+ gfp_t flags = cc_gfp_flags(&req->base);

/*
* Allocate and save the last IV sized bytes of the source, which will
* be lost in case of in-place decryption and might be needed for CTS.
*/
- req_ctx->backup_info = kmalloc(ivsize, GFP_KERNEL);
+ req_ctx->backup_info = kmalloc(ivsize, flags);
if (!req_ctx->backup_info)
return -ENOMEM;

diff --git a/drivers/staging/ccree/ssi_driver.h b/drivers/staging/ccree/ssi_driver.h
index 3810740..4548f78 100644
--- a/drivers/staging/ccree/ssi_driver.h
+++ b/drivers/staging/ccree/ssi_driver.h
@@ -184,5 +184,11 @@ static inline u32 cc_ioread(struct cc_drvdata *drvdata, u32 reg)
return ioread32(drvdata->cc_base + reg);
}

+static inline gfp_t cc_gfp_flags(struct crypto_async_request *req)
+{
+ return (req->flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
+ GFP_KERNEL : GFP_ATOMIC;
+}
+
#endif /*__CC_DRIVER_H__*/

diff --git a/drivers/staging/ccree/ssi_hash.c b/drivers/staging/ccree/ssi_hash.c
index a6702cf..5324914 100644
--- a/drivers/staging/ccree/ssi_hash.c
+++ b/drivers/staging/ccree/ssi_hash.c
@@ -123,7 +123,7 @@ static int cc_map_result(struct device *dev, struct ahash_req_ctx *state,
}

static int cc_map_req(struct device *dev, struct ahash_req_ctx *state,
- struct cc_hash_ctx *ctx)
+ struct cc_hash_ctx *ctx, gfp_t flags)
{
bool is_hmac = ctx->is_hmac;
cc_sram_addr_t larval_digest_addr =
@@ -132,27 +132,26 @@ static int cc_map_req(struct device *dev, struct ahash_req_ctx *state,
struct cc_hw_desc desc;
int rc = -ENOMEM;

- state->buff0 = kzalloc(CC_MAX_HASH_BLCK_SIZE, GFP_KERNEL);
+ state->buff0 = kzalloc(CC_MAX_HASH_BLCK_SIZE, flags);
if (!state->buff0)
goto fail0;

- state->buff1 = kzalloc(CC_MAX_HASH_BLCK_SIZE, GFP_KERNEL);
+ state->buff1 = kzalloc(CC_MAX_HASH_BLCK_SIZE, flags);
if (!state->buff1)
goto fail_buff0;

- state->digest_result_buff = kzalloc(CC_MAX_HASH_DIGEST_SIZE,
- GFP_KERNEL);
+ state->digest_result_buff = kzalloc(CC_MAX_HASH_DIGEST_SIZE, flags);
if (!state->digest_result_buff)
goto fail_buff1;

- state->digest_buff = kzalloc(ctx->inter_digestsize, GFP_KERNEL);
+ state->digest_buff = kzalloc(ctx->inter_digestsize, flags);
if (!state->digest_buff)
goto fail_digest_result_buff;

dev_dbg(dev, "Allocated digest-buffer in context ctx->digest_buff=@%p\n",
state->digest_buff);
if (ctx->hw_mode != DRV_CIPHER_XCBC_MAC) {
- state->digest_bytes_len = kzalloc(HASH_LEN_SIZE, GFP_KERNEL);
+ state->digest_bytes_len = kzalloc(HASH_LEN_SIZE, flags);
if (!state->digest_bytes_len)
goto fail1;

@@ -162,7 +161,7 @@ static int cc_map_req(struct device *dev, struct ahash_req_ctx *state,
state->digest_bytes_len = NULL;
}

- state->opad_digest_buff = kzalloc(ctx->inter_digestsize, GFP_KERNEL);
+ state->opad_digest_buff = kzalloc(ctx->inter_digestsize, flags);
if (!state->opad_digest_buff)
goto fail2;

@@ -415,11 +414,12 @@ static int cc_hash_digest(struct ahash_request *req)
cc_larval_digest_addr(ctx->drvdata, ctx->hash_mode);
int idx = 0;
int rc = 0;
+ gfp_t flags = cc_gfp_flags(&req->base);

dev_dbg(dev, "===== %s-digest (%d) ====\n", is_hmac ? "hmac" : "hash",
nbytes);

- if (cc_map_req(dev, state, ctx)) {
+ if (cc_map_req(dev, state, ctx, flags)) {
dev_err(dev, "map_ahash_source() failed\n");
return -ENOMEM;
}
@@ -429,7 +429,8 @@ static int cc_hash_digest(struct ahash_request *req)
return -ENOMEM;
}

- if (cc_map_hash_request_final(ctx->drvdata, state, src, nbytes, 1)) {
+ if (cc_map_hash_request_final(ctx->drvdata, state, src, nbytes, 1,
+ flags)) {
dev_err(dev, "map_ahash_request_final() failed\n");
return -ENOMEM;
}
@@ -566,6 +567,7 @@ static int cc_hash_update(struct ahash_request *req)
struct cc_hw_desc desc[CC_MAX_HASH_SEQ_LEN];
u32 idx = 0;
int rc;
+ gfp_t flags = cc_gfp_flags(&req->base);

dev_dbg(dev, "===== %s-update (%d) ====\n", ctx->is_hmac ?
"hmac" : "hash", nbytes);
@@ -576,7 +578,7 @@ static int cc_hash_update(struct ahash_request *req)
}

rc = cc_map_hash_request_update(ctx->drvdata, state, src, nbytes,
- block_size);
+ block_size, flags);
if (rc) {
if (rc == 1) {
dev_dbg(dev, " data size not require HW update %x\n",
@@ -653,11 +655,13 @@ static int cc_hash_finup(struct ahash_request *req)
struct cc_hw_desc desc[CC_MAX_HASH_SEQ_LEN];
int idx = 0;
int rc;
+ gfp_t flags = cc_gfp_flags(&req->base);

dev_dbg(dev, "===== %s-finup (%d) ====\n", is_hmac ? "hmac" : "hash",
nbytes);

- if (cc_map_hash_request_final(ctx->drvdata, state, src, nbytes, 1)) {
+ if (cc_map_hash_request_final(ctx->drvdata, state, src, nbytes, 1,
+ flags)) {
dev_err(dev, "map_ahash_request_final() failed\n");
return -ENOMEM;
}
@@ -773,11 +777,13 @@ static int cc_hash_final(struct ahash_request *req)
struct cc_hw_desc desc[CC_MAX_HASH_SEQ_LEN];
int idx = 0;
int rc;
+ gfp_t flags = cc_gfp_flags(&req->base);

dev_dbg(dev, "===== %s-final (%d) ====\n", is_hmac ? "hmac" : "hash",
nbytes);

- if (cc_map_hash_request_final(ctx->drvdata, state, src, nbytes, 0)) {
+ if (cc_map_hash_request_final(ctx->drvdata, state, src, nbytes, 0,
+ flags)) {
dev_err(dev, "map_ahash_request_final() failed\n");
return -ENOMEM;
}
@@ -894,11 +900,12 @@ static int cc_hash_init(struct ahash_request *req)
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
struct cc_hash_ctx *ctx = crypto_ahash_ctx(tfm);
struct device *dev = drvdata_to_dev(ctx->drvdata);
+ gfp_t flags = cc_gfp_flags(&req->base);

dev_dbg(dev, "===== init (%d) ====\n", req->nbytes);

state->xcbc_count = 0;
- cc_map_req(dev, state, ctx);
+ cc_map_req(dev, state, ctx, flags);

return 0;
}
@@ -1317,6 +1324,7 @@ static int cc_mac_update(struct ahash_request *req)
struct cc_hw_desc desc[CC_MAX_HASH_SEQ_LEN];
int rc;
u32 idx = 0;
+ gfp_t flags = cc_gfp_flags(&req->base);

if (req->nbytes == 0) {
/* no real updates required */
@@ -1326,7 +1334,7 @@ static int cc_mac_update(struct ahash_request *req)
state->xcbc_count++;

rc = cc_map_hash_request_update(ctx->drvdata, state, req->src,
- req->nbytes, block_size);
+ req->nbytes, block_size, flags);
if (rc) {
if (rc == 1) {
dev_dbg(dev, " data size not require HW update %x\n",
@@ -1379,7 +1387,7 @@ static int cc_mac_final(struct ahash_request *req)
int rc = 0;
u32 key_size, key_len;
u32 digestsize = crypto_ahash_digestsize(tfm);
-
+ gfp_t flags = cc_gfp_flags(&req->base);
u32 rem_cnt = state->buff_index ? state->buff1_cnt :
state->buff0_cnt;

@@ -1395,7 +1403,7 @@ static int cc_mac_final(struct ahash_request *req)
dev_dbg(dev, "===== final xcbc reminder (%d) ====\n", rem_cnt);

if (cc_map_hash_request_final(ctx->drvdata, state, req->src,
- req->nbytes, 0)) {
+ req->nbytes, 0, flags)) {
dev_err(dev, "map_ahash_request_final() failed\n");
return -ENOMEM;
}
@@ -1493,6 +1501,7 @@ static int cc_mac_finup(struct ahash_request *req)
int rc = 0;
u32 key_len = 0;
u32 digestsize = crypto_ahash_digestsize(tfm);
+ gfp_t flags = cc_gfp_flags(&req->base);

dev_dbg(dev, "===== finup xcbc(%d) ====\n", req->nbytes);
if (state->xcbc_count > 0 && req->nbytes == 0) {
@@ -1501,7 +1510,7 @@ static int cc_mac_finup(struct ahash_request *req)
}

if (cc_map_hash_request_final(ctx->drvdata, state, req->src,
- req->nbytes, 1)) {
+ req->nbytes, 1, flags)) {
dev_err(dev, "map_ahash_request_final() failed\n");
return -ENOMEM;
}
@@ -1565,10 +1574,11 @@ static int cc_mac_digest(struct ahash_request *req)
u32 key_len;
int idx = 0;
int rc;
+ gfp_t flags = cc_gfp_flags(&req->base);

dev_dbg(dev, "===== -digest mac (%d) ====\n", req->nbytes);

- if (cc_map_req(dev, state, ctx)) {
+ if (cc_map_req(dev, state, ctx, flags)) {
dev_err(dev, "map_ahash_source() failed\n");
return -ENOMEM;
}
@@ -1578,7 +1588,7 @@ static int cc_mac_digest(struct ahash_request *req)
}

if (cc_map_hash_request_final(ctx->drvdata, state, req->src,
- req->nbytes, 1)) {
+ req->nbytes, 1, flags)) {
dev_err(dev, "map_ahash_request_final() failed\n");
return -ENOMEM;
}
--
2.7.4
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