[PATCH v8 33/33] crypto: rockchip: Add support for RK3399

From: Corentin Labbe
Date: Wed Jul 06 2022 - 05:08:15 EST

The RK3399 has 2 rk3288 compatible crypto device named crypto0 and
crypto1. The only difference is lack of RSA in crypto1.

We need to add driver support for 2 parallel instance as only one need
to register crypto algorithms.
Then the driver will round robin each request on each device.

For avoiding complexity (device bringup after a TFM is created), PM is
modified to be handled per request.
Signed-off-by: Corentin Labbe <clabbe@xxxxxxxxxxxx>
---
drivers/crypto/rockchip/rk3288_crypto.c | 92 +++++++++++++++----
drivers/crypto/rockchip/rk3288_crypto.h | 25 +++--
drivers/crypto/rockchip/rk3288_crypto_ahash.c | 37 ++++----
.../crypto/rockchip/rk3288_crypto_skcipher.c | 37 ++++----
4 files changed, 123 insertions(+), 68 deletions(-)

diff --git a/drivers/crypto/rockchip/rk3288_crypto.c b/drivers/crypto/rockchip/rk3288_crypto.c
index d96f375423d5..6217e73ba4c4 100644
--- a/drivers/crypto/rockchip/rk3288_crypto.c
+++ b/drivers/crypto/rockchip/rk3288_crypto.c
@@ -19,6 +19,23 @@
#include <linux/crypto.h>
#include <linux/reset.h>

+static struct rockchip_ip rocklist = {
+ .dev_list = LIST_HEAD_INIT(rocklist.dev_list),
+ .lock = __SPIN_LOCK_UNLOCKED(rocklist.lock),
+};
+
+struct rk_crypto_info *get_rk_crypto(void)
+{
+ struct rk_crypto_info *first;
+
+ spin_lock(&rocklist.lock);
+ first = list_first_entry_or_null(&rocklist.dev_list,
+ struct rk_crypto_info, list);
+ list_rotate_left(&rocklist.dev_list);
+ spin_unlock(&rocklist.lock);
+ return first;
+}
+
static const struct rk_variant rk3288_variant = {
.num_clks = 4,
.rkclks = {
@@ -30,6 +47,10 @@ static const struct rk_variant rk3328_variant = {
.num_clks = 3,
};

+static const struct rk_variant rk3399_variant = {
+ .num_clks = 3,
+};
+
static int rk_crypto_get_clks(struct rk_crypto_info *dev)
{
int i, j, err;
@@ -83,8 +104,8 @@ static void rk_crypto_disable_clk(struct rk_crypto_info *dev)
}

/*
- * Power management strategy: The device is suspended unless a TFM exists for
- * one of the algorithms proposed by this driver.
+ * Power management strategy: The device is suspended until a request
+ * is handled. For avoiding suspend/resume yoyo, the autosuspend is set to 2s.
*/
static int rk_crypto_pm_suspend(struct device *dev)
{
@@ -166,8 +187,17 @@ static struct rk_crypto_tmp *rk_cipher_algs[] = {
#ifdef CONFIG_CRYPTO_DEV_ROCKCHIP_DEBUG
static int rk_crypto_debugfs_show(struct seq_file *seq, void *v)
{
+ struct rk_crypto_info *dd;
unsigned int i;

+ spin_lock(&rocklist.lock);
+ list_for_each_entry(dd, &rocklist.dev_list, list) {
+ seq_printf(seq, "%s %s requests: %lu\n",
+ dev_driver_string(dd->dev), dev_name(dd->dev),
+ dd->nreq);
+ }
+ spin_unlock(&rocklist.lock);
+
for (i = 0; i < ARRAY_SIZE(rk_cipher_algs); i++) {
if (!rk_cipher_algs[i]->dev)
continue;
@@ -198,6 +228,18 @@ static int rk_crypto_debugfs_show(struct seq_file *seq, void *v)
DEFINE_SHOW_ATTRIBUTE(rk_crypto_debugfs);
#endif

+static void register_debugfs(struct rk_crypto_info *crypto_info)
+{
+#ifdef CONFIG_CRYPTO_DEV_ROCKCHIP_DEBUG
+ /* Ignore error of debugfs */
+ rocklist.dbgfs_dir = debugfs_create_dir("rk3288_crypto", NULL);
+ rocklist.dbgfs_stats = debugfs_create_file("stats", 0444,
+ rocklist.dbgfs_dir,
+ &rocklist,
+ &rk_crypto_debugfs_fops);
+#endif
+}
+
static int rk_crypto_register(struct rk_crypto_info *crypto_info)
{
unsigned int i, k;
@@ -255,6 +297,9 @@ static const struct of_device_id crypto_of_id_table[] = {
{ .compatible = "rockchip,rk3328-crypto",
.data = &rk3328_variant,
},
+ { .compatible = "rockchip,rk3399-crypto",
+ .data = &rk3399_variant,
+ },
{}
};
MODULE_DEVICE_TABLE(of, crypto_of_id_table);
@@ -262,7 +307,7 @@ MODULE_DEVICE_TABLE(of, crypto_of_id_table);
static int rk_crypto_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct rk_crypto_info *crypto_info;
+ struct rk_crypto_info *crypto_info, *first;
int err = 0;

crypto_info = devm_kzalloc(&pdev->dev,
@@ -325,22 +370,22 @@ static int rk_crypto_probe(struct platform_device *pdev)
if (err)
goto err_pm;

- err = rk_crypto_register(crypto_info);
- if (err) {
- dev_err(dev, "err in register alg");
- goto err_register_alg;
- }
+ spin_lock(&rocklist.lock);
+ first = list_first_entry_or_null(&rocklist.dev_list,
+ struct rk_crypto_info, list);
+ list_add_tail(&crypto_info->list, &rocklist.dev_list);
+ spin_unlock(&rocklist.lock);
+
+ if (!first) {
+ err = rk_crypto_register(crypto_info);
+ if (err) {
+ dev_err(dev, "Fail to register crypto algorithms");
+ goto err_register_alg;
+ }

-#ifdef CONFIG_CRYPTO_DEV_ROCKCHIP_DEBUG
- /* Ignore error of debugfs */
- crypto_info->dbgfs_dir = debugfs_create_dir("rk3288_crypto", NULL);
- crypto_info->dbgfs_stats = debugfs_create_file("stats", 0444,
- crypto_info->dbgfs_dir,
- crypto_info,
- &rk_crypto_debugfs_fops);
-#endif
+ register_debugfs(crypto_info);
+ }

- dev_info(dev, "Crypto Accelerator successfully registered\n");
return 0;

err_register_alg:
@@ -355,11 +400,20 @@ static int rk_crypto_probe(struct platform_device *pdev)
static int rk_crypto_remove(struct platform_device *pdev)
{
struct rk_crypto_info *crypto_tmp = platform_get_drvdata(pdev);
+ struct rk_crypto_info *first;
+
+ spin_lock_bh(&rocklist.lock);
+ list_del(&crypto_tmp->list);
+ first = list_first_entry_or_null(&rocklist.dev_list,
+ struct rk_crypto_info, list);
+ spin_unlock_bh(&rocklist.lock);

+ if (!first) {
#ifdef CONFIG_CRYPTO_DEV_ROCKCHIP_DEBUG
- debugfs_remove_recursive(crypto_tmp->dbgfs_dir);
+ debugfs_remove_recursive(rocklist.dbgfs_dir);
#endif
- rk_crypto_unregister();
+ rk_crypto_unregister();
+ }
rk_crypto_pm_exit(crypto_tmp);
crypto_engine_exit(crypto_tmp->engine);
return 0;
diff --git a/drivers/crypto/rockchip/rk3288_crypto.h b/drivers/crypto/rockchip/rk3288_crypto.h
index ac979d67ced9..b2695258cade 100644
--- a/drivers/crypto/rockchip/rk3288_crypto.h
+++ b/drivers/crypto/rockchip/rk3288_crypto.h
@@ -190,6 +190,20 @@

#define RK_MAX_CLKS 4

+/*
+ * struct rockchip_ip - struct for managing a list of RK crypto instance
+ * @dev_list: Used for doing a list of rk_crypto_info
+ * @lock: Control access to dev_list
+ * @dbgfs_dir: Debugfs dentry for statistic directory
+ * @dbgfs_stats: Debugfs dentry for statistic counters
+ */
+struct rockchip_ip {
+ struct list_head dev_list;
+ spinlock_t lock; /* Control access to dev_list */
+ struct dentry *dbgfs_dir;
+ struct dentry *dbgfs_stats;
+};
+
struct rk_clks {
const char *name;
unsigned long max;
@@ -201,6 +215,7 @@ struct rk_variant {
};

struct rk_crypto_info {
+ struct list_head list;
struct device *dev;
struct clk_bulk_data *clks;
int num_clks;
@@ -208,19 +223,15 @@ struct rk_crypto_info {
void __iomem *reg;
int irq;
const struct rk_variant *variant;
+ unsigned long nreq;
struct crypto_engine *engine;
struct completion complete;
int status;
-#ifdef CONFIG_CRYPTO_DEV_ROCKCHIP_DEBUG
- struct dentry *dbgfs_dir;
- struct dentry *dbgfs_stats;
-#endif
};

/* the private variable of hash */
struct rk_ahash_ctx {
struct crypto_engine_ctx enginectx;
- struct rk_crypto_info *dev;
/* for fallback */
struct crypto_ahash *fallback_tfm;
};
@@ -236,7 +247,6 @@ struct rk_ahash_rctx {
/* the private variable of cipher */
struct rk_cipher_ctx {
struct crypto_engine_ctx enginectx;
- struct rk_crypto_info *dev;
unsigned int keylen;
u8 key[AES_MAX_KEY_SIZE];
u8 iv[AES_BLOCK_SIZE];
@@ -252,7 +262,7 @@ struct rk_cipher_rctx {

struct rk_crypto_tmp {
u32 type;
- struct rk_crypto_info *dev;
+ struct rk_crypto_info *dev;
union {
struct skcipher_alg skcipher;
struct ahash_alg hash;
@@ -276,4 +286,5 @@ extern struct rk_crypto_tmp rk_ahash_sha1;
extern struct rk_crypto_tmp rk_ahash_sha256;
extern struct rk_crypto_tmp rk_ahash_md5;

+struct rk_crypto_info *get_rk_crypto(void);
#endif
diff --git a/drivers/crypto/rockchip/rk3288_crypto_ahash.c b/drivers/crypto/rockchip/rk3288_crypto_ahash.c
index 30f78256c955..a78ff3dcd0b1 100644
--- a/drivers/crypto/rockchip/rk3288_crypto_ahash.c
+++ b/drivers/crypto/rockchip/rk3288_crypto_ahash.c
@@ -199,8 +199,8 @@ static int rk_ahash_export(struct ahash_request *req, void *out)
static int rk_ahash_digest(struct ahash_request *req)
{
struct rk_ahash_rctx *rctx = ahash_request_ctx(req);
- struct rk_ahash_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
- struct rk_crypto_info *dev = tctx->dev;
+ struct rk_crypto_info *dev;
+ struct crypto_engine *engine;

if (rk_ahash_need_fallback(req))
return rk_ahash_digest_fb(req);
@@ -208,9 +208,12 @@ static int rk_ahash_digest(struct ahash_request *req)
if (!req->nbytes)
return zero_message_process(req);

+ dev = get_rk_crypto();
+
rctx->dev = dev;
+ engine = dev->engine;

- return crypto_transfer_hash_request_to_engine(dev->engine, req);
+ return crypto_transfer_hash_request_to_engine(engine, req);
}

static void crypto_ahash_dma_start(struct rk_crypto_info *dev, struct scatterlist *sg)
@@ -260,9 +263,14 @@ static int rk_hash_run(struct crypto_engine *engine, void *breq)
int i;
u32 v;

+ err = pm_runtime_resume_and_get(rkc->dev);
+ if (err)
+ return err;
+
rctx->mode = 0;

algt->stat_req++;
+ rkc->nreq++;

switch (crypto_ahash_digestsize(tfm)) {
case SHA1_DIGEST_SIZE:
@@ -313,6 +321,8 @@ static int rk_hash_run(struct crypto_engine *engine, void *breq)
}

theend:
+ pm_runtime_put_autosuspend(rkc->dev);
+
local_bh_disable();
crypto_finalize_hash_request(engine, breq, err);
local_bh_enable();
@@ -323,21 +333,15 @@ static int rk_hash_run(struct crypto_engine *engine, void *breq)
static int rk_cra_hash_init(struct crypto_tfm *tfm)
{
struct rk_ahash_ctx *tctx = crypto_tfm_ctx(tfm);
- struct rk_crypto_tmp *algt;
- struct ahash_alg *alg = __crypto_ahash_alg(tfm->__crt_alg);
-
const char *alg_name = crypto_tfm_alg_name(tfm);
- int err;
-
- algt = container_of(alg, struct rk_crypto_tmp, alg.hash);
-
- tctx->dev = algt->dev;
+ struct ahash_alg *alg = __crypto_ahash_alg(tfm->__crt_alg);
+ struct rk_crypto_tmp *algt = container_of(alg, struct rk_crypto_tmp, alg.hash);

/* for fallback */
tctx->fallback_tfm = crypto_alloc_ahash(alg_name, 0,
CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(tctx->fallback_tfm)) {
- dev_err(tctx->dev->dev, "Could not load fallback driver.\n");
+ dev_err(algt->dev->dev, "Could not load fallback driver.\n");
return PTR_ERR(tctx->fallback_tfm);
}

@@ -349,15 +353,7 @@ static int rk_cra_hash_init(struct crypto_tfm *tfm)
tctx->enginectx.op.prepare_request = rk_hash_prepare;
tctx->enginectx.op.unprepare_request = rk_hash_unprepare;

- err = pm_runtime_resume_and_get(tctx->dev->dev);
- if (err < 0)
- goto error_pm;
-
return 0;
-error_pm:
- crypto_free_ahash(tctx->fallback_tfm);
-
- return err;
}

static void rk_cra_hash_exit(struct crypto_tfm *tfm)
@@ -365,7 +361,6 @@ static void rk_cra_hash_exit(struct crypto_tfm *tfm)
struct rk_ahash_ctx *tctx = crypto_tfm_ctx(tfm);

crypto_free_ahash(tctx->fallback_tfm);
- pm_runtime_put_autosuspend(tctx->dev->dev);
}

struct rk_crypto_tmp rk_ahash_sha1 = {
diff --git a/drivers/crypto/rockchip/rk3288_crypto_skcipher.c b/drivers/crypto/rockchip/rk3288_crypto_skcipher.c
index 0b1c90ababb7..59069457582b 100644
--- a/drivers/crypto/rockchip/rk3288_crypto_skcipher.c
+++ b/drivers/crypto/rockchip/rk3288_crypto_skcipher.c
@@ -17,11 +17,11 @@
static int rk_cipher_need_fallback(struct skcipher_request *req)
{
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
- unsigned int bs = crypto_skcipher_blocksize(tfm);
struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
struct rk_crypto_tmp *algt = container_of(alg, struct rk_crypto_tmp, alg.skcipher);
struct scatterlist *sgs, *sgd;
unsigned int stodo, dtodo, len;
+ unsigned int bs = crypto_skcipher_blocksize(tfm);

if (!req->cryptlen)
return true;
@@ -84,15 +84,16 @@ static int rk_cipher_fallback(struct skcipher_request *areq)

static int rk_cipher_handle_req(struct skcipher_request *req)
{
- struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
- struct rk_cipher_ctx *tctx = crypto_skcipher_ctx(tfm);
struct rk_cipher_rctx *rctx = skcipher_request_ctx(req);
- struct rk_crypto_info *rkc = tctx->dev;
- struct crypto_engine *engine = rkc->engine;
+ struct rk_crypto_info *rkc;
+ struct crypto_engine *engine;

if (rk_cipher_need_fallback(req))
return rk_cipher_fallback(req);

+ rkc = get_rk_crypto();
+
+ engine = rkc->engine;
rctx->dev = rkc;

return crypto_transfer_skcipher_request_to_engine(engine, req);
@@ -307,7 +308,12 @@ static int rk_cipher_run(struct crypto_engine *engine, void *async_req)
struct rk_crypto_tmp *algt = container_of(alg, struct rk_crypto_tmp, alg.skcipher);
struct rk_crypto_info *rkc = rctx->dev;

+ err = pm_runtime_resume_and_get(rkc->dev);
+ if (err)
+ return err;
+
algt->stat_req++;
+ rkc->nreq++;

ivsize = crypto_skcipher_ivsize(tfm);
if (areq->iv && crypto_skcipher_ivsize(tfm) > 0) {
@@ -401,6 +407,8 @@ static int rk_cipher_run(struct crypto_engine *engine, void *async_req)
}

theend:
+ pm_runtime_put_autosuspend(rkc->dev);
+
local_bh_disable();
crypto_finalize_skcipher_request(engine, areq, err);
local_bh_enable();
@@ -420,18 +428,13 @@ static int rk_cipher_run(struct crypto_engine *engine, void *async_req)
static int rk_cipher_tfm_init(struct crypto_skcipher *tfm)
{
struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
- struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
const char *name = crypto_tfm_alg_name(&tfm->base);
- struct rk_crypto_tmp *algt;
- int err;
-
- algt = container_of(alg, struct rk_crypto_tmp, alg.skcipher);
-
- ctx->dev = algt->dev;
+ struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
+ struct rk_crypto_tmp *algt = container_of(alg, struct rk_crypto_tmp, alg.skcipher);

ctx->fallback_tfm = crypto_alloc_skcipher(name, 0, CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(ctx->fallback_tfm)) {
- dev_err(ctx->dev->dev, "ERROR: Cannot allocate fallback for %s %ld\n",
+ dev_err(algt->dev->dev, "ERROR: Cannot allocate fallback for %s %ld\n",
name, PTR_ERR(ctx->fallback_tfm));
return PTR_ERR(ctx->fallback_tfm);
}
@@ -441,14 +444,7 @@ static int rk_cipher_tfm_init(struct crypto_skcipher *tfm)

ctx->enginectx.op.do_one_request = rk_cipher_run;

- err = pm_runtime_resume_and_get(ctx->dev->dev);
- if (err < 0)
- goto error_pm;
-
return 0;
-error_pm:
- crypto_free_skcipher(ctx->fallback_tfm);
- return err;
}

static void rk_cipher_tfm_exit(struct crypto_skcipher *tfm)
@@ -457,7 +453,6 @@ static void rk_cipher_tfm_exit(struct crypto_skcipher *tfm)

memzero_explicit(ctx->key, ctx->keylen);
crypto_free_skcipher(ctx->fallback_tfm);
- pm_runtime_put_autosuspend(ctx->dev->dev);
}

struct rk_crypto_tmp rk_ecb_aes_alg = {
--
2.35.1