crypto: ux500/hash - Set DMA configuration though dma_slave_config()

The DMA controller currently takes configuration information from
information passed though dma_channel_request(), but it shouldn't.
Using the API, the DMA channel should only be configured during
a dma_slave_config() call.

Cc: David S. Miller <davem@davemloft.net>
Cc: Andreas Westin <andreas.westin@stericsson.com>
Cc: linux-crypto@vger.kernel.org
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

2 files changed, 14 insertions, 1 deletions

diff --git a/drivers/crypto/ux500/hash/hash_alg.h b/drivers/crypto/ux500/hash/hash_alg.h
index cd9351cb24df..be6eb54da40f 100644
--- a/drivers/crypto/ux500/hash/hash_alg.h
+++ b/drivers/crypto/ux500/hash/hash_alg.h
@@ -11,6 +11,7 @@
 #include <linux/bitops.h>
 
 #define HASH_BLOCK_SIZE                 64
+#define HASH_DMA_FIFO                   4
 #define HASH_DMA_ALIGN_SIZE             4
 #define HASH_DMA_PERFORMANCE_MIN_SIZE   1024
 #define HASH_BYTES_PER_WORD             4
@@ -347,7 +348,8 @@ struct hash_req_ctx {
 
 /**
  * struct hash_device_data - structure for a hash device.
- * @base:               Pointer to the hardware base address.
+ * @base:               Pointer to virtual base address of the hash device.
+ * @phybase:            Pointer to physical memory location of the hash device.
  * @list_node:          For inclusion in klist.
  * @dev:                Pointer to the device dev structure.
  * @ctx_lock:           Spinlock for current_ctx.
@@ -361,6 +363,7 @@ struct hash_req_ctx {
  */
 struct hash_device_data {
         struct hash_register __iomem    *base;
+        phys_addr_t             phybase;
         struct klist_node       list_node;
         struct device           *dev;
         struct spinlock         ctx_lock;
diff --git a/drivers/crypto/ux500/hash/hash_core.c b/drivers/crypto/ux500/hash/hash_core.c
index 4b024280def1..62695764de1c 100644
--- a/drivers/crypto/ux500/hash/hash_core.c
+++ b/drivers/crypto/ux500/hash/hash_core.c
@@ -122,6 +122,13 @@ static void hash_dma_setup_channel(struct hash_device_data *device_data,
                                 struct device *dev)
 {
         struct hash_platform_data *platform_data = dev->platform_data;
+        struct dma_slave_config conf = {
+                .direction = DMA_MEM_TO_DEV,
+                .dst_addr = device_data->phybase + HASH_DMA_FIFO,
+                .dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES,
+                .dst_maxburst = 16,
+        };
+
         dma_cap_zero(device_data->dma.mask);
         dma_cap_set(DMA_SLAVE, device_data->dma.mask);
 
@@ -131,6 +138,8 @@ static void hash_dma_setup_channel(struct hash_device_data *device_data,
                                 platform_data->dma_filter,
                                 device_data->dma.cfg_mem2hash);
 
+        dmaengine_slave_config(device_data->dma.chan_mem2hash, &conf);
+
         init_completion(&device_data->dma.complete);
 }
 
@@ -1699,6 +1708,7 @@ static int ux500_hash_probe(struct platform_device *pdev)
                 goto out_kfree;
         }
 
+        device_data->phybase = res->start;
         device_data->base = ioremap(res->start, resource_size(res));
         if (!device_data->base) {
                 dev_err(dev, "[%s] ioremap() failed!",