The send_request() function was doing too much. Break it up for
better readability and as basis for next patch in series
Signed-off-by: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
---
drivers/staging/ccree/ssi_aead.c | 6 +-
drivers/staging/ccree/ssi_cipher.c | 3 +-
drivers/staging/ccree/ssi_hash.c | 22 ++--
drivers/staging/ccree/ssi_request_mgr.c | 180 ++++++++++++++++++--------------
drivers/staging/ccree/ssi_request_mgr.h | 11 +-
5 files changed, 128 insertions(+), 94 deletions(-)
diff --git a/drivers/staging/ccree/ssi_aead.c b/drivers/staging/ccree/ssi_aead.c
index b120bc9..939b1b1 100644
--- a/drivers/staging/ccree/ssi_aead.c
+++ b/drivers/staging/ccree/ssi_aead.c
@@ -531,7 +531,7 @@ cc_get_plain_hmac_key(struct crypto_aead *tfm, const u8 *key,
idx++;
}
- rc = send_request(ctx->drvdata, &cc_req, desc, idx, 0);
+ rc = cc_send_sync_request(ctx->drvdata, &cc_req, desc, idx);
if (rc)
dev_err(dev, "send_request() failed (rc=%d)\n", rc);
@@ -630,7 +630,7 @@ cc_aead_setkey(struct crypto_aead *tfm, const u8 *key, unsigned int keylen)
/* STAT_PHASE_3: Submit sequence to HW */
if (seq_len > 0) { /* For CCM there is no sequence to setup the key */
- rc = send_request(ctx->drvdata, &cc_req, desc, seq_len, 0);
+ rc = cc_send_sync_request(ctx->drvdata, &cc_req, desc, seq_len);
if (rc) {
dev_err(dev, "send_request() failed (rc=%d)\n", rc);
goto setkey_error;
@@ -2039,7 +2039,7 @@ static int cc_proc_aead(struct aead_request *req,
/* STAT_PHASE_3: Lock HW and push sequence */
- rc = send_request(ctx->drvdata, &cc_req, desc, seq_len, 1);
+ rc = cc_send_request(ctx->drvdata, &cc_req, desc, seq_len, &req->base);
if (rc != -EINPROGRESS) {
dev_err(dev, "send_request() failed (rc=%d)\n", rc);
diff --git a/drivers/staging/ccree/ssi_cipher.c b/drivers/staging/ccree/ssi_cipher.c
index 24196d1..6098d21 100644
--- a/drivers/staging/ccree/ssi_cipher.c
+++ b/drivers/staging/ccree/ssi_cipher.c
@@ -717,7 +717,8 @@ static int cc_cipher_process(struct ablkcipher_request *req,
/* STAT_PHASE_3: Lock HW and push sequence */
- rc = send_request(ctx_p->drvdata, &cc_req, desc, seq_len, 1);
+ rc = cc_send_request(ctx_p->drvdata, &cc_req, desc, seq_len,
+ &req->base);
if (rc != -EINPROGRESS) {
/* Failed to send the request or request completed
* synchronously
diff --git a/drivers/staging/ccree/ssi_hash.c b/drivers/staging/ccree/ssi_hash.c
index 1564854..076162c 100644
--- a/drivers/staging/ccree/ssi_hash.c
+++ b/drivers/staging/ccree/ssi_hash.c
@@ -532,7 +532,7 @@ static int cc_hash_digest(struct ahash_request *req)
cc_set_endianity(ctx->hash_mode, &desc[idx]);
idx++;
- rc = send_request(ctx->drvdata, &cc_req, desc, idx, 1);
+ rc = cc_send_request(ctx->drvdata, &cc_req, desc, idx, &req->base);
if (rc != -EINPROGRESS) {
dev_err(dev, "send_request() failed (rc=%d)\n", rc);
cc_unmap_hash_request(dev, state, src, true);
@@ -620,7 +620,7 @@ static int cc_hash_update(struct ahash_request *req)
set_setup_mode(&desc[idx], SETUP_WRITE_STATE1);
idx++;
- rc = send_request(ctx->drvdata, &cc_req, desc, idx, 1);
+ rc = cc_send_request(ctx->drvdata, &cc_req, desc, idx, &req->base);
if (rc != -EINPROGRESS) {
dev_err(dev, "send_request() failed (rc=%d)\n", rc);
cc_unmap_hash_request(dev, state, src, true);
@@ -741,7 +741,7 @@ static int cc_hash_finup(struct ahash_request *req)
set_cipher_mode(&desc[idx], ctx->hw_mode);
idx++;
- rc = send_request(ctx->drvdata, &cc_req, desc, idx, 1);
+ rc = cc_send_request(ctx->drvdata, &cc_req, desc, idx, &req->base);
if (rc != -EINPROGRESS) {
dev_err(dev, "send_request() failed (rc=%d)\n", rc);
cc_unmap_hash_request(dev, state, src, true);
@@ -873,7 +873,7 @@ static int cc_hash_final(struct ahash_request *req)
set_cipher_mode(&desc[idx], ctx->hw_mode);
idx++;
- rc = send_request(ctx->drvdata, &cc_req, desc, idx, 1);
+ rc = cc_send_request(ctx->drvdata, &cc_req, desc, idx, &req->base);
if (rc != -EINPROGRESS) {
dev_err(dev, "send_request() failed (rc=%d)\n", rc);
cc_unmap_hash_request(dev, state, src, true);
@@ -1014,7 +1014,7 @@ static int cc_hash_setkey(struct crypto_ahash *ahash, const u8 *key,
idx++;
}
- rc = send_request(ctx->drvdata, &cc_req, desc, idx, 0);
+ rc = cc_send_sync_request(ctx->drvdata, &cc_req, desc, idx);
if (rc) {
dev_err(dev, "send_request() failed (rc=%d)\n", rc);
goto out;
@@ -1071,7 +1071,7 @@ static int cc_hash_setkey(struct crypto_ahash *ahash, const u8 *key,
idx++;
}
- rc = send_request(ctx->drvdata, &cc_req, desc, idx, 0);
+ rc = cc_send_sync_request(ctx->drvdata, &cc_req, desc, idx);
out:
if (rc)
@@ -1154,7 +1154,7 @@ static int cc_xcbc_setkey(struct crypto_ahash *ahash,
CC_AES_128_BIT_KEY_SIZE, NS_BIT, 0);
idx++;
- rc = send_request(ctx->drvdata, &cc_req, desc, idx, 0);
+ rc = cc_send_sync_request(ctx->drvdata, &cc_req, desc, idx);
if (rc)
crypto_ahash_set_flags(ahash, CRYPTO_TFM_RES_BAD_KEY_LEN);
@@ -1355,7 +1355,7 @@ static int cc_mac_update(struct ahash_request *req)
cc_req.user_cb = (void *)cc_update_complete;
cc_req.user_arg = (void *)req;
- rc = send_request(ctx->drvdata, &cc_req, desc, idx, 1);
+ rc = cc_send_request(ctx->drvdata, &cc_req, desc, idx, &req->base);
if (rc != -EINPROGRESS) {
dev_err(dev, "send_request() failed (rc=%d)\n", rc);
cc_unmap_hash_request(dev, state, req->src, true);
@@ -1468,7 +1468,7 @@ static int cc_mac_final(struct ahash_request *req)
set_cipher_mode(&desc[idx], ctx->hw_mode);
idx++;
- rc = send_request(ctx->drvdata, &cc_req, desc, idx, 1);
+ rc = cc_send_request(ctx->drvdata, &cc_req, desc, idx, &req->base);
if (rc != -EINPROGRESS) {
dev_err(dev, "send_request() failed (rc=%d)\n", rc);
cc_unmap_hash_request(dev, state, req->src, true);
@@ -1541,7 +1541,7 @@ static int cc_mac_finup(struct ahash_request *req)
set_cipher_mode(&desc[idx], ctx->hw_mode);
idx++;
- rc = send_request(ctx->drvdata, &cc_req, desc, idx, 1);
+ rc = cc_send_request(ctx->drvdata, &cc_req, desc, idx, &req->base);
if (rc != -EINPROGRESS) {
dev_err(dev, "send_request() failed (rc=%d)\n", rc);
cc_unmap_hash_request(dev, state, req->src, true);
@@ -1615,7 +1615,7 @@ static int cc_mac_digest(struct ahash_request *req)
set_cipher_mode(&desc[idx], ctx->hw_mode);
idx++;
- rc = send_request(ctx->drvdata, &cc_req, desc, idx, 1);
+ rc = cc_send_request(ctx->drvdata, &cc_req, desc, idx, &req->base);
if (rc != -EINPROGRESS) {
dev_err(dev, "send_request() failed (rc=%d)\n", rc);
cc_unmap_hash_request(dev, state, req->src, true);
diff --git a/drivers/staging/ccree/ssi_request_mgr.c b/drivers/staging/ccree/ssi_request_mgr.c
index 5812ffd..f52cd72 100644
--- a/drivers/staging/ccree/ssi_request_mgr.c
+++ b/drivers/staging/ccree/ssi_request_mgr.c
@@ -172,7 +172,7 @@ static void enqueue_seq(struct cc_drvdata *drvdata, struct cc_hw_desc seq[],
/*!
* Completion will take place if and only if user requested completion
- * by setting "is_dout = 0" in send_request().
+ * by cc_send_sync_request().
*
* \param dev
* \param dx_compl_h The completion event to signal
@@ -199,7 +199,7 @@ static int cc_queues_status(struct cc_drvdata *drvdata,
req_mgr_h->req_queue_tail) {
dev_err(dev, "SW FIFO is full. req_queue_head=%d sw_fifo_len=%d\n",
req_mgr_h->req_queue_head, MAX_REQUEST_QUEUE_SIZE);
- return -EBUSY;
+ return -ENOSPC;
}
if (req_mgr_h->q_free_slots >= total_seq_len)
@@ -224,24 +224,25 @@ static int cc_queues_status(struct cc_drvdata *drvdata,
dev_dbg(dev, "HW FIFO full, timeout. req_queue_head=%d sw_fifo_len=%d q_free_slots=%d total_seq_len=%d\n",
req_mgr_h->req_queue_head, MAX_REQUEST_QUEUE_SIZE,
req_mgr_h->q_free_slots, total_seq_len);
- return -EAGAIN;
+ return -ENOSPC;
}
/*!
* Enqueue caller request to crypto hardware.
+ * Need to be called with HW lock held and PM running
*
* \param drvdata
* \param cc_req The request to enqueue
* \param desc The crypto sequence
* \param len The crypto sequence length
- * \param is_dout If "true": completion is handled by the caller
- * If "false": this function adds a dummy descriptor completion
- * and waits upon completion signal.
+ * \param add_comp If "true": add an artificial dout DMA to mark completion
*
- * \return int Returns -EINPROGRESS if "is_dout=true"; "0" if "is_dout=false"
+ * \return int Returns -EINPROGRESS or error code
*/
-int send_request(struct cc_drvdata *drvdata, struct cc_crypto_req *cc_req,
- struct cc_hw_desc *desc, unsigned int len, bool is_dout)
+static int cc_do_send_request(struct cc_drvdata *drvdata,
+ struct cc_crypto_req *cc_req,
+ struct cc_hw_desc *desc, unsigned int len,
+ bool add_comp, bool ivgen)
{
struct cc_req_mgr_handle *req_mgr_h = drvdata->request_mgr_handle;
unsigned int used_sw_slots;
@@ -250,59 +251,8 @@ int send_request(struct cc_drvdata *drvdata, struct cc_crypto_req *cc_req,
struct cc_hw_desc iv_seq[CC_IVPOOL_SEQ_LEN];
struct device *dev = drvdata_to_dev(drvdata);
int rc;
- unsigned int max_required_seq_len =
- (total_seq_len +
- ((cc_req->ivgen_dma_addr_len == 0) ? 0 :
- CC_IVPOOL_SEQ_LEN) + (!is_dout ? 1 : 0));
-
-#if defined(CONFIG_PM)
- rc = cc_pm_get(dev);
- if (rc) {
- dev_err(dev, "ssi_power_mgr_runtime_get returned %x\n", rc);
- return rc;
- }
-#endif
-
- do {
- spin_lock_bh(&req_mgr_h->hw_lock);
-
- /* Check if there is enough place in the SW/HW queues
- * in case iv gen add the max size and in case of no dout add 1
- * for the internal completion descriptor
- */
- rc = cc_queues_status(drvdata, req_mgr_h, max_required_seq_len);
- if (rc == 0)
- /* There is enough place in the queue */
- break;
- /* something wrong release the spinlock*/
- spin_unlock_bh(&req_mgr_h->hw_lock);
-
- if (rc != -EAGAIN) {
- /* Any error other than HW queue full
- * (SW queue is full)
- */
-#if defined(CONFIG_PM)
- cc_pm_put_suspend(dev);
-#endif
- return rc;
- }
-
- /* HW queue is full - wait for it to clear up */
- wait_for_completion_interruptible(&drvdata->hw_queue_avail);
- reinit_completion(&drvdata->hw_queue_avail);
- } while (1);
- /* Additional completion descriptor is needed incase caller did not
- * enabled any DLLI/MLLI DOUT bit in the given sequence
- */
- if (!is_dout) {
- init_completion(&cc_req->seq_compl);
- cc_req->user_cb = request_mgr_complete;
- cc_req->user_arg = &cc_req->seq_compl;
- total_seq_len++;
- }
-
- if (cc_req->ivgen_dma_addr_len > 0) {
+ if (ivgen) {
dev_dbg(dev, "Acquire IV from pool into %d DMA addresses %pad, %pad, %pad, IV-size=%u\n",
cc_req->ivgen_dma_addr_len,
&cc_req->ivgen_dma_addr[0],
@@ -318,10 +268,6 @@ int send_request(struct cc_drvdata *drvdata, struct cc_crypto_req *cc_req,
if (rc) {
dev_err(dev, "Failed to generate IV (rc=%d)\n", rc);
- spin_unlock_bh(&req_mgr_h->hw_lock);
-#if defined(CONFIG_PM)
- cc_pm_put_suspend(dev);
-#endif
return rc;
}
@@ -350,9 +296,15 @@ int send_request(struct cc_drvdata *drvdata, struct cc_crypto_req *cc_req,
wmb();
/* STAT_PHASE_4: Push sequence */
- enqueue_seq(drvdata, iv_seq, iv_seq_len);
+ if (ivgen)
+ enqueue_seq(drvdata, iv_seq, iv_seq_len);
+
enqueue_seq(drvdata, desc, len);
- enqueue_seq(drvdata, &req_mgr_h->compl_desc, (is_dout ? 0 : 1));
+
+ if (add_comp) {
+ enqueue_seq(drvdata, &req_mgr_h->compl_desc, 1);
+ total_seq_len++;
+ }
if (req_mgr_h->q_free_slots < total_seq_len) {
/* This situation should never occur. Maybe indicating problem
@@ -366,19 +318,95 @@ int send_request(struct cc_drvdata *drvdata, struct cc_crypto_req *cc_req,
req_mgr_h->q_free_slots -= total_seq_len;
}
- spin_unlock_bh(&req_mgr_h->hw_lock);
-
- if (!is_dout) {
- /* Wait upon sequence completion.
- * Return "0" -Operation done successfully.
- */
- wait_for_completion(&cc_req->seq_compl);
- return 0;
- }
/* Operation still in process */
return -EINPROGRESS;
}
+int cc_send_request(struct cc_drvdata *drvdata, struct cc_crypto_req *cc_req,
+ struct cc_hw_desc *desc, unsigned int len,
+ struct crypto_async_request *req)
+{
+ int rc;
+ struct cc_req_mgr_handle *mgr = drvdata->request_mgr_handle;
+ bool ivgen = !!cc_req->ivgen_dma_addr_len;
+ unsigned int total_len = len + (ivgen ? CC_IVPOOL_SEQ_LEN : 0);
+ struct device *dev = drvdata_to_dev(drvdata);
+
+#if defined(CONFIG_PM)
+ rc = cc_pm_get(dev);
+ if (rc) {
+ dev_err(dev, "ssi_power_mgr_runtime_get returned %x\n", rc);
+ return rc;
+ }
+#endif
+ spin_lock_bh(&mgr->hw_lock);
+ rc = cc_queues_status(drvdata, mgr, total_len);
+
+ if (!rc)
+ rc = cc_do_send_request(drvdata, cc_req, desc, len, false,
+ ivgen);
+
+ spin_unlock_bh(&mgr->hw_lock);
+
+#if defined(CONFIG_PM)
+ if (rc != -EINPROGRESS)
+ cc_pm_put_suspend(dev);
+#endif
+
+ return rc;
+}
+
+int cc_send_sync_request(struct cc_drvdata *drvdata,
+ struct cc_crypto_req *cc_req, struct cc_hw_desc *desc,
+ unsigned int len)
+{
+ int rc;
+ struct device *dev = drvdata_to_dev(drvdata);
+ struct cc_req_mgr_handle *mgr = drvdata->request_mgr_handle;
+
+ init_completion(&cc_req->seq_compl);
+ cc_req->user_cb = request_mgr_complete;
+ cc_req->user_arg = &cc_req->seq_compl;
+
+#if defined(CONFIG_PM)
+ rc = cc_pm_get(dev);
+ if (rc) {
+ dev_err(dev, "ssi_power_mgr_runtime_get returned %x\n", rc);
+ return rc;
+ }
+#endif
+ while (true) {
+ spin_lock_bh(&mgr->hw_lock);
+ rc = cc_queues_status(drvdata, mgr, len + 1);
+
+ if (!rc)
+ break;
+
+ spin_unlock_bh(&mgr->hw_lock);
+ if (rc != -EAGAIN) {
+#if defined(CONFIG_PM)
+ cc_pm_put_suspend(dev);
+#endif
+ return rc;
+ }
+ wait_for_completion_interruptible(&drvdata->hw_queue_avail);
+ reinit_completion(&drvdata->hw_queue_avail);
+ }
+
+ rc = cc_do_send_request(drvdata, cc_req, desc, len, true, false);
+ spin_unlock_bh(&mgr->hw_lock);
+
+ if (rc != -EINPROGRESS) {
+#if defined(CONFIG_PM)
+ cc_pm_put_suspend(dev);
+#endif
+ return rc;
+ }
+
+ wait_for_completion(&cc_req->seq_compl);
+ return 0;
+}
+
/*!
* Enqueue caller request to crypto hardware during init process.
* assume this function is not called in middle of a flow,
diff --git a/drivers/staging/ccree/ssi_request_mgr.h b/drivers/staging/ccree/ssi_request_mgr.h
index 1aaa7e3..a53887a 100644
--- a/drivers/staging/ccree/ssi_request_mgr.h
+++ b/drivers/staging/ccree/ssi_request_mgr.h
@@ -23,10 +23,15 @@ int cc_req_mgr_init(struct cc_drvdata *drvdata);
* If "false": this function adds a dummy descriptor completion
* and waits upon completion signal.
*
- * \return int Returns -EINPROGRESS if "is_dout=true"; "0" if "is_dout=false"
+ * \return int Returns -EINPROGRESS or error
*/
-int send_request(struct cc_drvdata *drvdata, struct cc_crypto_req *cc_req,
- struct cc_hw_desc *desc, unsigned int len, bool is_dout);
+int cc_send_request(struct cc_drvdata *drvdata, struct cc_crypto_req *cc_req,
+ struct cc_hw_desc *desc, unsigned int len,
+ struct crypto_async_request *req);
+
+int cc_send_sync_request(struct cc_drvdata *drvdata,
+ struct cc_crypto_req *cc_req, struct cc_hw_desc *desc,
+ unsigned int len);
int send_request_init(struct cc_drvdata *drvdata, struct cc_hw_desc *desc,
unsigned int len);
--
2.7.4
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