diff options
author | Gilad Ben-Yossef <gilad@benyossef.com> | 2017-06-25 10:47:23 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-25 16:29:15 +0200 |
commit | d255b343f52b78acff3d0af95b235a3b4f353377 (patch) | |
tree | 48b307894f0a42cf37bb64085fea8e25464b77c3 | |
parent | 675ef02fcb1b958eebbd6cd013ab227396f1d2d5 (diff) | |
download | linux-d255b343f52b78acff3d0af95b235a3b4f353377.tar.bz2 |
staging: ccree: add DT bus coherency detection
The ccree driver has build time configurable support
to work on top of coherent (e.g. ACP) vs. none coherent bus
connections. Turn it to run-time configurable option
based on device tree.
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | drivers/staging/ccree/Kconfig | 9 | ||||
-rw-r--r-- | drivers/staging/ccree/ssi_buffer_mgr.c | 37 | ||||
-rw-r--r-- | drivers/staging/ccree/ssi_config.h | 20 | ||||
-rw-r--r-- | drivers/staging/ccree/ssi_driver.c | 12 | ||||
-rw-r--r-- | drivers/staging/ccree/ssi_driver.h | 3 |
5 files changed, 32 insertions, 49 deletions
diff --git a/drivers/staging/ccree/Kconfig b/drivers/staging/ccree/Kconfig index 4be87f503e3b..ec3749d318d2 100644 --- a/drivers/staging/ccree/Kconfig +++ b/drivers/staging/ccree/Kconfig @@ -32,12 +32,3 @@ config CCREE_FIPS_SUPPORT Say 'Y' to enable support for FIPS compliant mode by the CCREE driver. If unsure say N. - -config CCREE_DISABLE_COHERENT_DMA_OPS - bool "Disable Coherent DMA operations for the CCREE driver" - depends on CRYPTO_DEV_CCREE - default n - help - Say 'Y' to disable the use of coherent DMA operations by the - CCREE driver for debugging purposes. - If unsure say N. diff --git a/drivers/staging/ccree/ssi_buffer_mgr.c b/drivers/staging/ccree/ssi_buffer_mgr.c index 88ebda854377..4373d1dcc408 100644 --- a/drivers/staging/ccree/ssi_buffer_mgr.c +++ b/drivers/staging/ccree/ssi_buffer_mgr.c @@ -627,6 +627,7 @@ void ssi_buffer_mgr_unmap_aead_request( struct aead_req_ctx *areq_ctx = aead_request_ctx(req); unsigned int hw_iv_size = areq_ctx->hw_iv_size; struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct ssi_drvdata *drvdata = dev_get_drvdata(dev); u32 dummy; bool chained; u32 size_to_unmap = 0; @@ -700,8 +701,8 @@ void ssi_buffer_mgr_unmap_aead_request( dma_unmap_sg(dev, req->dst, ssi_buffer_mgr_get_sgl_nents(req->dst,size_to_unmap,&dummy,&chained), DMA_BIDIRECTIONAL); } -#if DX_HAS_ACP - if ((areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT) && + if (drvdata->coherent && + (areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT) && likely(req->src == req->dst)) { u32 size_to_skip = req->assoclen; @@ -716,7 +717,6 @@ void ssi_buffer_mgr_unmap_aead_request( size_to_skip+ req->cryptlen - areq_ctx->req_authsize, size_to_skip+ req->cryptlen, SSI_SG_FROM_BUF); } -#endif } static inline int ssi_buffer_mgr_get_aead_icv_nents( @@ -981,20 +981,24 @@ static inline int ssi_buffer_mgr_prepare_aead_data_mlli( * MAC verification upon request completion */ if (direct == DRV_CRYPTO_DIRECTION_DECRYPT) { -#if !DX_HAS_ACP - /* In ACP platform we already copying ICV - * for any INPLACE-DECRYPT operation, hence + if (!drvdata->coherent) { + /* In coherent platforms (e.g. ACP) + * already copying ICV for any + * INPLACE-DECRYPT operation, hence * we must neglect this code. */ - u32 size_to_skip = req->assoclen; - if (areq_ctx->is_gcm4543) { - size_to_skip += crypto_aead_ivsize(tfm); + u32 skip = req->assoclen; + + if (areq_ctx->is_gcm4543) + skip += crypto_aead_ivsize(tfm); + + ssi_buffer_mgr_copy_scatterlist_portion( + areq_ctx->backup_mac, req->src, + (skip + req->cryptlen - + areq_ctx->req_authsize), + skip + req->cryptlen, + SSI_SG_TO_BUF); } - ssi_buffer_mgr_copy_scatterlist_portion( - areq_ctx->backup_mac, req->src, - size_to_skip+ req->cryptlen - areq_ctx->req_authsize, - size_to_skip+ req->cryptlen, SSI_SG_TO_BUF); -#endif areq_ctx->icv_virt_addr = areq_ctx->backup_mac; } else { areq_ctx->icv_virt_addr = areq_ctx->mac_buf; @@ -1281,8 +1285,8 @@ int ssi_buffer_mgr_map_aead_request( mlli_params->curr_pool = NULL; sg_data.num_of_buffers = 0; -#if DX_HAS_ACP - if ((areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT) && + if (drvdata->coherent && + (areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_DECRYPT) && likely(req->src == req->dst)) { u32 size_to_skip = req->assoclen; @@ -1297,7 +1301,6 @@ int ssi_buffer_mgr_map_aead_request( size_to_skip+ req->cryptlen - areq_ctx->req_authsize, size_to_skip+ req->cryptlen, SSI_SG_TO_BUF); } -#endif /* cacluate the size for cipher remove ICV in decrypt*/ areq_ctx->cryptlen = (areq_ctx->gen_ctx.op_type == diff --git a/drivers/staging/ccree/ssi_config.h b/drivers/staging/ccree/ssi_config.h index b7c05765b2bd..ff7597c2d77e 100644 --- a/drivers/staging/ccree/ssi_config.h +++ b/drivers/staging/ccree/ssi_config.h @@ -23,7 +23,6 @@ #include <linux/version.h> -#define DISABLE_COHERENT_DMA_OPS //#define FLUSH_CACHE_ALL //#define COMPLETION_DELAY //#define DX_DUMP_DESCS @@ -33,24 +32,5 @@ //#define DX_IRQ_DELAY 100000 #define DMA_BIT_MASK_LEN 48 /* was 32 bit, but for juno's sake it was enlarged to 48 bit */ -#if defined (CONFIG_ARM64) // TODO currently only this mode was test on Juno (which is ARM64), need to enable coherent also. -#define DISABLE_COHERENT_DMA_OPS -#endif - -/* Define the CryptoCell DMA cache coherency signals configuration */ -#if defined (DISABLE_COHERENT_DMA_OPS) - /* Software Controlled Cache Coherency (SCCC) */ - #define SSI_CACHE_PARAMS (0x000) - /* CC attached to NONE-ACP such as HPP/ACE/AMBA4. - * The customer is responsible to enable/disable this feature - * according to his platform type. - */ - #define DX_HAS_ACP 0 -#else - #define SSI_CACHE_PARAMS (0xEEE) - /* CC attached to ACP */ - #define DX_HAS_ACP 1 -#endif - #endif /*__DX_CONFIG_H__*/ diff --git a/drivers/staging/ccree/ssi_driver.c b/drivers/staging/ccree/ssi_driver.c index c516675558c9..151afcfa602d 100644 --- a/drivers/staging/ccree/ssi_driver.c +++ b/drivers/staging/ccree/ssi_driver.c @@ -58,6 +58,7 @@ #include <linux/random.h> #include <linux/of.h> #include <linux/clk.h> +#include <linux/of_address.h> #include "ssi_config.h" #include "ssi_driver.h" @@ -172,7 +173,7 @@ static irqreturn_t cc_isr(int irq, void *dev_id) int init_cc_regs(struct ssi_drvdata *drvdata, bool is_probe) { - unsigned int val; + unsigned int val, cache_params; void __iomem *cc_base = drvdata->cc_base; /* Unmask all AXI interrupt sources AXI_CFG1 register */ @@ -201,14 +202,18 @@ int init_cc_regs(struct ssi_drvdata *drvdata, bool is_probe) } #endif + cache_params = (drvdata->coherent ? CC_COHERENT_CACHE_PARAMS : 0x0); + val = CC_HAL_READ_REGISTER(CC_REG_OFFSET(CRY_KERNEL, AXIM_CACHE_PARAMS)); if (is_probe == true) { SSI_LOG_INFO("Cache params previous: 0x%08X\n", val); } - CC_HAL_WRITE_REGISTER(CC_REG_OFFSET(CRY_KERNEL, AXIM_CACHE_PARAMS), SSI_CACHE_PARAMS); + CC_HAL_WRITE_REGISTER(CC_REG_OFFSET(CRY_KERNEL, AXIM_CACHE_PARAMS), + cache_params); val = CC_HAL_READ_REGISTER(CC_REG_OFFSET(CRY_KERNEL, AXIM_CACHE_PARAMS)); if (is_probe == true) { - SSI_LOG_INFO("Cache params current: 0x%08X (expected: 0x%08X)\n", val, SSI_CACHE_PARAMS); + SSI_LOG_INFO("Cache params current: 0x%08X (expect: 0x%08X)\n", + val, cache_params); } return 0; @@ -232,6 +237,7 @@ static int init_cc_resources(struct platform_device *plat_dev) } new_drvdata->clk = of_clk_get(np, 0); + new_drvdata->coherent = of_dma_is_coherent(np); /*Initialize inflight counter used in dx_ablkcipher_secure_complete used for count of BYSPASS blocks operations*/ new_drvdata->inflight_counter = 0; diff --git a/drivers/staging/ccree/ssi_driver.h b/drivers/staging/ccree/ssi_driver.h index faf47b180134..1b8471bc1531 100644 --- a/drivers/staging/ccree/ssi_driver.h +++ b/drivers/staging/ccree/ssi_driver.h @@ -55,6 +55,8 @@ #define DRV_MODULE_VERSION "3.0" #define SSI_DEV_NAME_STR "cc715ree" +#define CC_COHERENT_CACHE_PARAMS 0xEEE + #define SSI_CC_HAS_AES_CCM 1 #define SSI_CC_HAS_AES_GCM 1 #define SSI_CC_HAS_AES_XTS 1 @@ -150,6 +152,7 @@ struct ssi_drvdata { void *sram_mgr_handle; u32 inflight_counter; struct clk *clk; + bool coherent; }; struct ssi_crypto_alg { |