diff options
| -rw-r--r-- | Documentation/devicetree/bindings/crypto/amd-ccp.txt | 3 | ||||
| -rw-r--r-- | drivers/crypto/ccp/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/crypto/ccp/ccp-dev.c | 2 | ||||
| -rw-r--r-- | drivers/crypto/ccp/ccp-dev.h | 4 | ||||
| -rw-r--r-- | drivers/crypto/ccp/ccp-platform.c | 6 |
5 files changed, 15 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/crypto/amd-ccp.txt b/Documentation/devicetree/bindings/crypto/amd-ccp.txt index 6e0b11aa8995..8c61183b41e0 100644 --- a/Documentation/devicetree/bindings/crypto/amd-ccp.txt +++ b/Documentation/devicetree/bindings/crypto/amd-ccp.txt @@ -7,6 +7,9 @@ Required properties: that services interrupts for this device - interrupts: Should contain the CCP interrupt +Optional properties: +- dma-coherent: Present if dma operations are coherent + Example: ccp@e0100000 { compatible = "amd,ccp-seattle-v1a"; diff --git a/drivers/crypto/ccp/Kconfig b/drivers/crypto/ccp/Kconfig index 7639ffc36c68..474382d50ec4 100644 --- a/drivers/crypto/ccp/Kconfig +++ b/drivers/crypto/ccp/Kconfig @@ -3,6 +3,7 @@ config CRYPTO_DEV_CCP_DD depends on CRYPTO_DEV_CCP default m select HW_RANDOM + select OF if ARM64 help Provides the interface to use the AMD Cryptographic Coprocessor which can be used to accelerate or offload encryption operations diff --git a/drivers/crypto/ccp/ccp-dev.c b/drivers/crypto/ccp/ccp-dev.c index fa1ab10f960f..a7d110652a74 100644 --- a/drivers/crypto/ccp/ccp-dev.c +++ b/drivers/crypto/ccp/ccp-dev.c @@ -364,7 +364,7 @@ int ccp_init(struct ccp_device *ccp) #ifdef CONFIG_ARM64 /* For arm64 set the recommended queue cache settings */ - iowrite32(CACHE_WB_NO_ALLOC, ccp->io_regs + CMD_Q_CACHE_BASE + + iowrite32(ccp->axcache, ccp->io_regs + CMD_Q_CACHE_BASE + (CMD_Q_CACHE_INC * i)); #endif diff --git a/drivers/crypto/ccp/ccp-dev.h b/drivers/crypto/ccp/ccp-dev.h index 1c5651b09506..62ff35a6b9ec 100644 --- a/drivers/crypto/ccp/ccp-dev.h +++ b/drivers/crypto/ccp/ccp-dev.h @@ -30,6 +30,7 @@ #define TRNG_RETRIES 10 +#define CACHE_NONE 0x00 #define CACHE_WB_NO_ALLOC 0xb7 @@ -255,6 +256,9 @@ struct ccp_device { /* Suspend support */ unsigned int suspending; wait_queue_head_t suspend_queue; + + /* DMA caching attribute support */ + unsigned int axcache; }; diff --git a/drivers/crypto/ccp/ccp-platform.c b/drivers/crypto/ccp/ccp-platform.c index 65e58291c668..b0a2806908f1 100644 --- a/drivers/crypto/ccp/ccp-platform.c +++ b/drivers/crypto/ccp/ccp-platform.c @@ -22,6 +22,7 @@ #include <linux/spinlock.h> #include <linux/delay.h> #include <linux/ccp.h> +#include <linux/of.h> #include "ccp-dev.h" @@ -112,6 +113,11 @@ static int ccp_platform_probe(struct platform_device *pdev) *(dev->dma_mask) = DMA_BIT_MASK(48); dev->coherent_dma_mask = DMA_BIT_MASK(48); + if (of_property_read_bool(dev->of_node, "dma-coherent")) + ccp->axcache = CACHE_WB_NO_ALLOC; + else + ccp->axcache = CACHE_NONE; + dev_set_drvdata(dev, ccp); ret = ccp_init(ccp); |