Linux-f2fs-devel Archive on lore.kernel.org
 help / color / Atom feed
* [f2fs-dev] [PATCH 3/9] mmc: dw_mmc: support crypto operation
       [not found] <CGME20190821064219epcas2p28b42391923012ecc7875313b8b2b9a1a@epcas2p2.samsung.com>
@ 2019-08-21  6:42 ` boojin.kim
  0 siblings, 0 replies; only message in thread
From: boojin.kim @ 2019-08-21  6:42 UTC (permalink / raw)
  To: Jaehoon Chung, Ulf Hansson, linux-mmc, linux-kernel
  Cc: Ulf Hansson, Mike Snitzer, dm-devel, Andreas Dilger,
	Alasdair Kergon, Eric Biggers, linux-samsung-soc, Herbert Xu,
	Krzysztof Kozlowski, Jaehoon Chung, Kukjin Kim, linux-ext4,
	linux-block, linux-fscrypt, Jaegeuk Kim, linux-arm-kernel,
	Jens Axboe, Theodore Ts'o, linux-mmc, linux-kernel,
	linux-f2fs-devel, linux-crypto, linux-fsdevel, David S. Miller

This patch supports the crypto operation in mmc driver.
Two vops are added to dw_mci_drv_data for it.
The crypto_engine_cfg() is required to set crypto information such as
key and algorithm modes before I/O.
The crypto_engine_clear() is required to clear the crypto information
set in the H/W after I/O.

Cc: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Boojin Kim <boojin.kim@samsung.com>
---
 drivers/mmc/host/dw_mmc.c | 22 +++++++++++++++++++++-
 drivers/mmc/host/dw_mmc.h |  6 ++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index eea52e2..0cdf574 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -470,6 +470,7 @@ static void dw_mci_dmac_complete_dma(void *arg)
 {
 	struct dw_mci *host = arg;
 	struct mmc_data *data = host->data;
+	const struct dw_mci_drv_data *drv_data = host->drv_data;
 
 	dev_vdbg(host->dev, "DMA complete\n");
 
@@ -481,6 +482,9 @@ static void dw_mci_dmac_complete_dma(void *arg)
 				    data->sg_len,
 				    DMA_FROM_DEVICE);
 
+	if (drv_data && drv_data->crypto_engine_clear)
+		drv_data->crypto_engine_clear(host, host->sg_cpu, false);
+
 	host->dma_ops->cleanup(host);
 
 	/*
@@ -577,8 +581,10 @@ static inline int dw_mci_prepare_desc64(struct dw_mci
*host,
 {
 	unsigned int desc_len;
 	struct idmac_desc_64addr *desc_first, *desc_last, *desc;
+	int i, ret;
+	const struct dw_mci_drv_data *drv_data = host->drv_data;
+	int sector_offset = 0;
 	u32 val;
-	int i;
 
 	desc_first = desc_last = desc = host->sg_cpu;
 
@@ -618,6 +624,20 @@ static inline int dw_mci_prepare_desc64(struct dw_mci
*host,
 			desc->des4 = mem_addr & 0xffffffff;
 			desc->des5 = mem_addr >> 32;
 
+			if (drv_data && drv_data->crypto_engine_cfg) {
+				ret = drv_data->crypto_engine_cfg(host,
desc,
+						data, sg_page(&data->sg[i]),
i,
+						sector_offset, false);
+				if (ret) {
+					dev_err(host->dev,
+						"%s: fail to set
crypto(%d)\n",
+						__func__, ret);
+					return -EPERM;
+				}
+				/* mmc sector size */
+				sector_offset += desc_len / 512;
+			}
+
 			/* Update physical address for the next desc */
 			mem_addr += desc_len;
 
diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index da5923a..b32d39b 100644
--- a/drivers/mmc/host/dw_mmc.h
+++ b/drivers/mmc/host/dw_mmc.h
@@ -563,5 +563,11 @@ struct dw_mci_drv_data {
 						struct mmc_ios *ios);
 	int		(*switch_voltage)(struct mmc_host *mmc,
 					  struct mmc_ios *ios);
+	int		(*crypto_engine_cfg)(struct dw_mci *host, void
*desc,
+				struct mmc_data *data, struct page *page,
+				int page_offset, int sector_offset,
+				bool cmdq_enabled);
+	int		(*crypto_engine_clear)(struct dw_mci *host,
+				void *desc, bool cmdq_enabled);
 };
 #endif /* _DW_MMC_H_ */
-- 
2.7.4



_______________________________________________
Linux-f2fs-devel mailing list
Linux-f2fs-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel

^ permalink raw reply	[flat|nested] only message in thread

only message in thread, back to index

Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <CGME20190821064219epcas2p28b42391923012ecc7875313b8b2b9a1a@epcas2p2.samsung.com>
2019-08-21  6:42 ` [f2fs-dev] [PATCH 3/9] mmc: dw_mmc: support crypto operation boojin.kim

Linux-f2fs-devel Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-f2fs-devel/0 linux-f2fs-devel/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-f2fs-devel linux-f2fs-devel/ https://lore.kernel.org/linux-f2fs-devel \
		linux-f2fs-devel@lists.sourceforge.net linux-f2fs-devel@archiver.kernel.org
	public-inbox-index linux-f2fs-devel


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/net.sourceforge.lists.linux-f2fs-devel


AGPL code for this site: git clone https://public-inbox.org/ public-inbox