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Subject[PATCH RFC 05/10] crypto: engine: transform cur_req in an array
Date
For having the ability of doing a batch of request in one do_one_request(), we
should be able to store them in an array. (for unpreparing them later).
This patch converts cur_req in an array of request, but for the moment
hardcode the maximum to 1.

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
---
crypto/crypto_engine.c | 32 ++++++++++++++++++--------------
include/crypto/engine.h | 19 +++++++++++++++----
2 files changed, 33 insertions(+), 18 deletions(-)

diff --git a/crypto/crypto_engine.c b/crypto/crypto_engine.c
index eb029ff1e05a..b72873550587 100644
--- a/crypto/crypto_engine.c
+++ b/crypto/crypto_engine.c
@@ -30,26 +30,27 @@ static void crypto_finalize_request(struct crypto_engine *engine,
struct crypto_engine_ctx *enginectx;

spin_lock_irqsave(&engine->queue_lock, flags);
- if (engine->cur_req == req)
+ if (engine->cur_reqs[0].req == req)
finalize_cur_req = true;
spin_unlock_irqrestore(&engine->queue_lock, flags);

if (finalize_cur_req) {
- enginectx = crypto_tfm_ctx(req->tfm);
- if (engine->cur_req_prepared &&
+ enginectx = crypto_tfm_ctx(engine->cur_reqs[0].req->tfm);
+ if (engine->cur_reqs[0].prepared &&
enginectx->op.unprepare_request) {
- ret = enginectx->op.unprepare_request(engine, req);
+ ret = enginectx->op.unprepare_request(engine, engine->cur_reqs[0].req);
if (ret)
dev_err(engine->dev, "failed to unprepare request\n");
}
+ engine->cur_reqs[0].req->complete(engine->cur_reqs[0].req, err);
spin_lock_irqsave(&engine->queue_lock, flags);
- engine->cur_req = NULL;
- engine->cur_req_prepared = false;
+ engine->cur_reqs[0].prepared = false;
+ engine->cur_reqs[0].req = NULL;
spin_unlock_irqrestore(&engine->queue_lock, flags);
+ } else {
+ req->complete(req, err);
}

- req->complete(req, err);
-
kthread_queue_work(engine->kworker, &engine->pump_requests);
}

@@ -74,7 +75,7 @@ static void crypto_pump_requests(struct crypto_engine *engine,
spin_lock_irqsave(&engine->queue_lock, flags);

/* Make sure we are not already running a request */
- if (engine->cur_req)
+ if (engine->cur_reqs[0].req)
goto out;

/* If another context is idling then defer */
@@ -114,7 +115,7 @@ static void crypto_pump_requests(struct crypto_engine *engine,
if (!async_req)
goto out;

- engine->cur_req = async_req;
+ engine->cur_reqs[0].req = async_req;
if (backlog)
backlog->complete(backlog, -EINPROGRESS);

@@ -143,14 +144,14 @@ static void crypto_pump_requests(struct crypto_engine *engine,
ret);
goto req_err;
}
- engine->cur_req_prepared = true;
+ engine->cur_reqs[0].prepared = true;
}
if (!enginectx->op.do_one_request) {
dev_err(engine->dev, "failed to do request\n");
ret = -EINVAL;
goto req_err;
}
- ret = enginectx->op.do_one_request(engine, async_req);
+ ret = enginectx->op.do_one_request(engine, engine->cur_reqs[0].req);
if (ret) {
dev_err(engine->dev, "Failed to do one request from queue: %d\n", ret);
goto req_err;
@@ -158,7 +159,7 @@ static void crypto_pump_requests(struct crypto_engine *engine,
return;

req_err:
- crypto_finalize_request(engine, async_req, ret);
+ crypto_finalize_request(engine, engine->cur_reqs[0].req, ret);
return;

out:
@@ -411,10 +412,13 @@ struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt)
engine->running = false;
engine->busy = false;
engine->idling = false;
- engine->cur_req_prepared = false;
engine->priv_data = dev;
snprintf(engine->name, sizeof(engine->name),
"%s-engine", dev_name(dev));
+ engine->rmax = 1;
+ engine->cur_reqs = devm_kzalloc(dev, sizeof(struct cur_req) * engine->rmax, GFP_KERNEL);
+ if (!engine->cur_reqs)
+ return NULL;

crypto_init_queue(&engine->queue, CRYPTO_ENGINE_MAX_QLEN);
spin_lock_init(&engine->queue_lock);
diff --git a/include/crypto/engine.h b/include/crypto/engine.h
index e29cd67f93c7..362134e226f4 100644
--- a/include/crypto/engine.h
+++ b/include/crypto/engine.h
@@ -18,13 +18,23 @@
#include <crypto/skcipher.h>

#define ENGINE_NAME_LEN 30
+
+/*
+ * struct cur_req - Represent a request to be processed
+ * @prepared: Does the request was prepared
+ * @req: The request to be processed
+ */
+struct cur_req {
+ bool prepared;
+ struct crypto_async_request *req;
+};
+
/*
* struct crypto_engine - crypto hardware engine
* @name: the engine name
* @idling: the engine is entering idle state
* @busy: request pump is busy
* @running: the engine is on working
- * @cur_req_prepared: current request is prepared
* @list: link with the global crypto engine list
* @queue_lock: spinlock to syncronise access to request queue
* @queue: the crypto queue of the engine
@@ -38,14 +48,14 @@
* @kworker: kthread worker struct for request pump
* @pump_requests: work struct for scheduling work to the request pump
* @priv_data: the engine private data
- * @cur_req: the current request which is on processing
+ * @rmax: The number of request which can be processed in one batch
+ * @cur_reqs: A list for requests to be processed
*/
struct crypto_engine {
char name[ENGINE_NAME_LEN];
bool idling;
bool busy;
bool running;
- bool cur_req_prepared;

struct list_head list;
spinlock_t queue_lock;
@@ -61,7 +71,8 @@ struct crypto_engine {
struct kthread_work pump_requests;

void *priv_data;
- struct crypto_async_request *cur_req;
+ int rmax;
+ struct cur_req *cur_reqs;
};

/*
--
2.24.1
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