[PATCH v7 13/15] crypto: caam - force DMA address to 32-bit on 64-bit i.MX SoCs

[Andrey Smirnov]

i.MX8 mScale SoC still use 32-bit addresses in its CAAM implmentation,
so change all of the code to be able to handle that.

Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
Cc: Chris Spencer <christopher.spencer@xxxxxxxxx>
Cc: Cory Tusar <cory.tusar@xxxxxxxx>
Cc: Chris Healy <cphealy@xxxxxxxxx>
Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Cc: Horia GeantÄ <horia.geanta@xxxxxxx>
Cc: Aymen Sghaier <aymen.sghaier@xxxxxxx>
Cc: Leonard Crestez <leonard.crestez@xxxxxxx>
Cc: linux-crypto@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
 drivers/crypto/caam/caampkc.c     |  8 +++----
 drivers/crypto/caam/ctrl.c        |  6 +++--
 drivers/crypto/caam/desc_constr.h | 10 ++++++--
 drivers/crypto/caam/intern.h      |  2 +-
 drivers/crypto/caam/pdb.h         | 16 +++++++++----
 drivers/crypto/caam/pkc_desc.c    |  8 +++----
 drivers/crypto/caam/regs.h        | 39 +++++++++++++++++++++++--------
 7 files changed, 62 insertions(+), 27 deletions(-)

diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c
index 80574106af29..0e95ad555156 100644
--- a/drivers/crypto/caam/caampkc.c
+++ b/drivers/crypto/caam/caampkc.c
@@ -17,13 +17,13 @@
 #include "sg_sw_sec4.h"
 #include "caampkc.h"
 
-#define DESC_RSA_PUB_LEN	(2 * CAAM_CMD_SZ + sizeof(struct rsa_pub_pdb))
+#define DESC_RSA_PUB_LEN	(2 * CAAM_CMD_SZ + SIZEOF_RSA_PUB_PDB)
 #define DESC_RSA_PRIV_F1_LEN	(2 * CAAM_CMD_SZ + \
-				 sizeof(struct rsa_priv_f1_pdb))
+				 SIZEOF_RSA_PRIV_F1_PDB)
 #define DESC_RSA_PRIV_F2_LEN	(2 * CAAM_CMD_SZ + \
-				 sizeof(struct rsa_priv_f2_pdb))
+				 SIZEOF_RSA_PRIV_F2_PDB)
 #define DESC_RSA_PRIV_F3_LEN	(2 * CAAM_CMD_SZ + \
-				 sizeof(struct rsa_priv_f3_pdb))
+				 SIZEOF_RSA_PRIV_F3_PDB)
 #define CAAM_RSA_MAX_INPUT_SIZE	512 /* for a 4096-bit modulus */
 
 /* buffer filled with zeros, used for padding */
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index 2f608206947a..7f6022a73865 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -598,11 +598,13 @@ static int caam_probe(struct platform_device *pdev)
 		ret = init_clocks(dev, imx_soc_match->data);
 		if (ret)
 			return ret;
+
+		caam_ptr_sz = sizeof(u32);
+	} else {
+		caam_ptr_sz = sizeof(dma_addr_t);
 	}
 	caam_imx = (bool)imx_soc_match;
 
-	caam_ptr_sz = sizeof(dma_addr_t);
-
 	/* Get configuration properties from device tree */
 	/* First, get register page */
 	ctrl = of_iomap(nprop, 0);
diff --git a/drivers/crypto/caam/desc_constr.h b/drivers/crypto/caam/desc_constr.h
index e0dc1e27ee80..53b9c1ab5098 100644
--- a/drivers/crypto/caam/desc_constr.h
+++ b/drivers/crypto/caam/desc_constr.h
@@ -136,9 +136,15 @@ static inline void init_job_desc_pdb(u32 * const desc, u32 options,
 
 static inline void append_ptr(u32 * const desc, dma_addr_t ptr)
 {
-	dma_addr_t *offset = (dma_addr_t *)desc_end(desc);
+	if (caam_ptr_sz == sizeof(dma_addr_t)) {
+		dma_addr_t *offset = (dma_addr_t *)desc_end(desc);
 
-	*offset = cpu_to_caam_dma(ptr);
+		*offset = cpu_to_caam_dma(ptr);
+	} else {
+		u32 *offset = (u32 *)desc_end(desc);
+
+		*offset = cpu_to_caam_dma(ptr);
+	}
 
 	(*desc) = cpu_to_caam32(caam32_to_cpu(*desc) +
 				CAAM_PTR_SZ / CAAM_CMD_SZ);
diff --git a/drivers/crypto/caam/intern.h b/drivers/crypto/caam/intern.h
index c00c7c84ec84..731b06becd9c 100644
--- a/drivers/crypto/caam/intern.h
+++ b/drivers/crypto/caam/intern.h
@@ -219,7 +219,7 @@ static inline u64 caam_get_dma_mask(struct device *dev)
 {
 	struct device_node *nprop = dev->of_node;
 
-	if (sizeof(dma_addr_t) != sizeof(u64))
+	if (caam_ptr_sz != sizeof(u64))
 		return DMA_BIT_MASK(32);
 
 	if (caam_dpaa2)
diff --git a/drivers/crypto/caam/pdb.h b/drivers/crypto/caam/pdb.h
index 810f0bef0652..68c1fd5dee5d 100644
--- a/drivers/crypto/caam/pdb.h
+++ b/drivers/crypto/caam/pdb.h
@@ -512,7 +512,9 @@ struct rsa_pub_pdb {
 	dma_addr_t	n_dma;
 	dma_addr_t	e_dma;
 	u32		f_len;
-} __packed;
+};
+
+#define SIZEOF_RSA_PUB_PDB	(2 * sizeof(u32) + 4 * caam_ptr_sz)
 
 /**
  * RSA Decrypt PDB - Private Key Form #1
@@ -528,7 +530,9 @@ struct rsa_priv_f1_pdb {
 	dma_addr_t	f_dma;
 	dma_addr_t	n_dma;
 	dma_addr_t	d_dma;
-} __packed;
+};
+
+#define SIZEOF_RSA_PRIV_F1_PDB	(sizeof(u32) + 4 * caam_ptr_sz)
 
 /**
  * RSA Decrypt PDB - Private Key Form #2
@@ -554,7 +558,9 @@ struct rsa_priv_f2_pdb {
 	dma_addr_t	tmp1_dma;
 	dma_addr_t	tmp2_dma;
 	u32		p_q_len;
-} __packed;
+};
+
+#define SIZEOF_RSA_PRIV_F2_PDB	(2 * sizeof(u32) + 7 * caam_ptr_sz)
 
 /**
  * RSA Decrypt PDB - Private Key Form #3
@@ -586,6 +592,8 @@ struct rsa_priv_f3_pdb {
 	dma_addr_t	tmp1_dma;
 	dma_addr_t	tmp2_dma;
 	u32		p_q_len;
-} __packed;
+};
+
+#define SIZEOF_RSA_PRIV_F3_PDB	(2 * sizeof(u32) + 9 * caam_ptr_sz)
 
 #endif
diff --git a/drivers/crypto/caam/pkc_desc.c b/drivers/crypto/caam/pkc_desc.c
index 2a8d87ea94bf..0d5ee762e036 100644
--- a/drivers/crypto/caam/pkc_desc.c
+++ b/drivers/crypto/caam/pkc_desc.c
@@ -13,7 +13,7 @@
 /* Descriptor for RSA Public operation */
 void init_rsa_pub_desc(u32 *desc, struct rsa_pub_pdb *pdb)
 {
-	init_job_desc_pdb(desc, 0, sizeof(*pdb));
+	init_job_desc_pdb(desc, 0, SIZEOF_RSA_PUB_PDB);
 	append_cmd(desc, pdb->sgf);
 	append_ptr(desc, pdb->f_dma);
 	append_ptr(desc, pdb->g_dma);
@@ -26,7 +26,7 @@ void init_rsa_pub_desc(u32 *desc, struct rsa_pub_pdb *pdb)
 /* Descriptor for RSA Private operation - Private Key Form #1 */
 void init_rsa_priv_f1_desc(u32 *desc, struct rsa_priv_f1_pdb *pdb)
 {
-	init_job_desc_pdb(desc, 0, sizeof(*pdb));
+	init_job_desc_pdb(desc, 0, SIZEOF_RSA_PRIV_F1_PDB);
 	append_cmd(desc, pdb->sgf);
 	append_ptr(desc, pdb->g_dma);
 	append_ptr(desc, pdb->f_dma);
@@ -39,7 +39,7 @@ void init_rsa_priv_f1_desc(u32 *desc, struct rsa_priv_f1_pdb *pdb)
 /* Descriptor for RSA Private operation - Private Key Form #2 */
 void init_rsa_priv_f2_desc(u32 *desc, struct rsa_priv_f2_pdb *pdb)
 {
-	init_job_desc_pdb(desc, 0, sizeof(*pdb));
+	init_job_desc_pdb(desc, 0, SIZEOF_RSA_PRIV_F2_PDB);
 	append_cmd(desc, pdb->sgf);
 	append_ptr(desc, pdb->g_dma);
 	append_ptr(desc, pdb->f_dma);
@@ -56,7 +56,7 @@ void init_rsa_priv_f2_desc(u32 *desc, struct rsa_priv_f2_pdb *pdb)
 /* Descriptor for RSA Private operation - Private Key Form #3 */
 void init_rsa_priv_f3_desc(u32 *desc, struct rsa_priv_f3_pdb *pdb)
 {
-	init_job_desc_pdb(desc, 0, sizeof(*pdb));
+	init_job_desc_pdb(desc, 0, SIZEOF_RSA_PRIV_F3_PDB);
 	append_cmd(desc, pdb->sgf);
 	append_ptr(desc, pdb->g_dma);
 	append_ptr(desc, pdb->f_dma);
diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h
index ec49f5ba9689..f7a1584046ea 100644
--- a/drivers/crypto/caam/regs.h
+++ b/drivers/crypto/caam/regs.h
@@ -191,7 +191,8 @@ static inline u64 caam_dma64_to_cpu(u64 value)
 
 static inline u64 cpu_to_caam_dma(u64 value)
 {
-	if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT))
+	if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) &&
+	    caam_ptr_sz == sizeof(u64))
 		return cpu_to_caam_dma64(value);
 	else
 		return cpu_to_caam32(value);
@@ -199,7 +200,8 @@ static inline u64 cpu_to_caam_dma(u64 value)
 
 static inline u64 caam_dma_to_cpu(u64 value)
 {
-	if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT))
+	if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) &&
+	    caam_ptr_sz == sizeof(u64))
 		return caam_dma64_to_cpu(value);
 	else
 		return caam32_to_cpu(value);
@@ -213,13 +215,24 @@ static inline u64 caam_dma_to_cpu(u64 value)
 static inline void jr_outentry_get(void *outring, int hw_idx, dma_addr_t *desc,
 				   u32 *jrstatus)
 {
-	struct {
-		dma_addr_t desc;/* Pointer to completed descriptor */
-		u32 jrstatus;	/* Status for completed descriptor */
-	} __packed *outentry = outring;
 
-	*desc = outentry[hw_idx].desc;
-	*jrstatus = outentry[hw_idx].jrstatus;
+	if (caam_ptr_sz == sizeof(u32)) {
+		struct {
+			u32 desc;
+			u32 jrstatus;
+		} __packed *outentry = outring;
+
+		*desc = outentry[hw_idx].desc;
+		*jrstatus = outentry[hw_idx].jrstatus;
+	} else {
+		struct {
+			dma_addr_t desc;/* Pointer to completed descriptor */
+			u32 jrstatus;	/* Status for completed descriptor */
+		} __packed *outentry = outring;
+
+		*desc = outentry[hw_idx].desc;
+		*jrstatus = outentry[hw_idx].jrstatus;
+	}
 }
 
 #define SIZEOF_JR_OUTENTRY	(caam_ptr_sz + sizeof(u32))
@@ -246,9 +259,15 @@ static inline u32 jr_outentry_jrstatus(void *outring, int hw_idx)
 
 static inline void jr_inpentry_set(void *inpring, int hw_idx, dma_addr_t val)
 {
-	dma_addr_t *inpentry = inpring;
+	if (caam_ptr_sz == sizeof(u32)) {
+		u32 *inpentry = inpring;
 
-	inpentry[hw_idx] = val;
+		inpentry[hw_idx] = val;
+	} else {
+		dma_addr_t *inpentry = inpring;
+
+		inpentry[hw_idx] = val;
+	}
 }
 
 #define SIZEOF_JR_INPENTRY	caam_ptr_sz
-- 
2.21.0