Messages in this thread Patch in this message |  | | From | Bartosz Golaszewski <> | | Date | Tue, 10 Mar 2026 16:44:24 +0100 | | Subject | [PATCH v12 10/12] crypto: qce - Map crypto memory for DMA |
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From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
As the first step in converting the driver to using DMA for register I/O, let's map the crypto memory range.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> --- drivers/crypto/qce/core.c | 25 +++++++++++++++++++++++-- drivers/crypto/qce/core.h | 6 ++++++ 2 files changed, 29 insertions(+), 2 deletions(-)
diff --git a/drivers/crypto/qce/core.c b/drivers/crypto/qce/core.c index 8b7bcd0c420c45caf8b29e5455e0f384fd5c5616..2667fcd67fee826a44080da8f88a3e2abbb9b2cf 100644 --- a/drivers/crypto/qce/core.c +++ b/drivers/crypto/qce/core.c @@ -185,10 +185,19 @@ static int qce_check_version(struct qce_device *qce) return 0; } +static void qce_crypto_unmap_dma(void *data) +{ + struct qce_device *qce = data; + + dma_unmap_resource(qce->dev, qce->base_dma, qce->dma_size, + DMA_BIDIRECTIONAL, 0); +} + 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); @@ -198,7 +207,7 @@ 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); @@ -244,7 +253,19 @@ static int qce_crypto_probe(struct platform_device *pdev) qce->async_req_enqueue = qce_async_request_enqueue; qce->async_req_done = qce_async_request_done; - return devm_qce_register_algs(qce); + ret = devm_qce_register_algs(qce); + if (ret) + return ret; + + qce->dma_size = resource_size(res); + qce->base_dma = dma_map_resource(dev, res->start, qce->dma_size, + DMA_BIDIRECTIONAL, 0); + qce->base_phys = res->start; + ret = dma_mapping_error(dev, qce->base_dma); + if (ret) + return ret; + + return devm_add_action_or_reset(qce->dev, qce_crypto_unmap_dma, qce); } 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 f092ce2d3b04a936a37805c20ac5ba78d8fdd2df..a80e12eac6c87e5321cce16c56a4bf5003474ef0 100644 --- a/drivers/crypto/qce/core.h +++ b/drivers/crypto/qce/core.h @@ -27,6 +27,9 @@ * @dma: pointer to dma data * @burst_size: the crypto burst size * @pipe_pair_id: which pipe pair id the device using + * @base_dma: base DMA address + * @base_phys: base physical address + * @dma_size: size of memory mapped for DMA * @async_req_enqueue: invoked by every algorithm to enqueue a request * @async_req_done: invoked by every algorithm to finish its request */ @@ -43,6 +46,9 @@ struct qce_device { struct qce_dma_data dma; int burst_size; unsigned int pipe_pair_id; + dma_addr_t base_dma; + phys_addr_t base_phys; + size_t dma_size; int (*async_req_enqueue)(struct qce_device *qce, struct crypto_async_request *req); void (*async_req_done)(struct qce_device *qce, int ret); -- 2.47.3
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