[PATCH v5 04/12] crypto: qce - Add support for crypto address read

Md Sadre Alam
2024-12-12T04:17:31Z

Get crypto base address from DT. This will use for
command descriptor support for crypto register r/w
via BAM/DMA.

Signed-off-by: Md Sadre Alam <quic_mdalam@quicinc.com>
---

Change in [v5]

* No Change

Change in [v4]

* Added error handling path for dma_map_resource()

Change in [v3]

* Added dma_unmap_resource() in qce_crypto_remove()

Change in [v2]

* Added crypto added read from device tree

Change in [v1]

* This patch was not included in [v1]

drivers/crypto/qce/core.c | 14 ++++++++++++--
drivers/crypto/qce/core.h | 1 +
2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/qce/core.c b/drivers/crypto/qce/core.c
index e228a31fe28d..9306e09d0d80 100644
--- a/drivers/crypto/qce/core.c
+++ b/drivers/crypto/qce/core.c
@@ -192,6 +192,7 @@ static int qce_crypto_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct qce_device *qce;
+ struct resource *res;
int ret;

qce = devm_kzalloc(dev, sizeof(*qce), GFP_KERNEL);
@@ -201,7 +202,7 @@ static int qce_crypto_probe(struct platform_device *pdev)
qce->dev = dev;
platform_set_drvdata(pdev, qce);

- qce->base = devm_platform_ioremap_resource(pdev, 0);
+ qce->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
if (IS_ERR(qce->base))
return PTR_ERR(qce->base);

@@ -261,7 +262,12 @@ static int qce_crypto_probe(struct platform_device *pdev)
if (ret)
goto err_dma;

- return 0;
+ qce->base_dma = dma_map_resource(dev, res->start,
+ resource_size(res),
+ DMA_BIDIRECTIONAL, 0);
+ ret = dma_mapping_error(dev, qce->base_dma);
+ if (!ret)
+ return 0;

err_dma:
qce_dma_release(&qce->dma);
@@ -280,6 +286,7 @@ static int qce_crypto_probe(struct platform_device *pdev)
static void qce_crypto_remove(struct platform_device *pdev)
{
struct qce_device *qce = platform_get_drvdata(pdev);
+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

tasklet_kill(&qce->done_tasklet);
qce_unregister_algs(qce);
@@ -287,6 +294,9 @@ static void qce_crypto_remove(struct platform_device *pdev)
clk_disable_unprepare(qce->bus);
clk_disable_unprepare(qce->iface);
clk_disable_unprepare(qce->core);
+
+ dma_unmap_resource(&pdev->dev, qce->base_dma, resource_size(res),
+ DMA_BIDIRECTIONAL, 0);
}

static const struct of_device_id qce_crypto_of_match[] = {
diff --git a/drivers/crypto/qce/core.h b/drivers/crypto/qce/core.h
index 228fcd69ec51..25e2af45c047 100644
--- a/drivers/crypto/qce/core.h
+++ b/drivers/crypto/qce/core.h
@@ -39,6 +39,7 @@ struct qce_device {
struct qce_dma_data dma;
int burst_size;
unsigned int pipe_pair_id;
+ dma_addr_t base_dma;
int (*async_req_enqueue)(struct qce_device *qce,
struct crypto_async_request *req);
void (*async_req_done)(struct qce_device *qce, int ret);
--
2.34.1