[PATCH v8 09/16] crypto: caam - make CAAM_PTR_SZ dynamic

[Andrey Smirnov <andrew.smirnov@gmail.com>]

In order to be able to configure CAAM pointer size at run-time, which
needed to support i.MX8MQ, which is 64-bit SoC with 32-bit pointer
size, convert CAAM_PTR_SZ to refer to a global variable of the same
name ("caam_ptr_sz") and adjust the rest of the code accordingly. No
functional change intended.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Chris Spencer <christopher.spencer@sea.co.uk>
Cc: Cory Tusar <cory.tusar@zii.aero>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Horia Geantă <horia.geanta@nxp.com>
Cc: Aymen Sghaier <aymen.sghaier@nxp.com>
Cc: Leonard Crestez <leonard.crestez@nxp.com>
Cc: linux-crypto@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/crypto/caam/caamalg.c     |  2 +-
 drivers/crypto/caam/caamhash.c    |  2 +-
 drivers/crypto/caam/caamrng.c     |  2 +-
 drivers/crypto/caam/ctrl.c        |  1 +
 drivers/crypto/caam/desc_constr.h | 12 +++++++++---
 drivers/crypto/caam/error.c       |  3 +++
 6 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index 947ba8ef487a..2053b3a71b48 100644
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -74,7 +74,7 @@
 
 #define CHACHAPOLY_DESC_JOB_IO_LEN	(AEAD_DESC_JOB_IO_LEN + CAAM_CMD_SZ * 6)
 
-#define DESC_MAX_USED_BYTES		(CAAM_DESC_BYTES_MAX - DESC_JOB_IO_LEN)
+#define DESC_MAX_USED_BYTES		(CAAM_DESC_BYTES_MAX - DESC_JOB_IO_LEN_MIN)
 #define DESC_MAX_USED_LEN		(DESC_MAX_USED_BYTES / CAAM_CMD_SZ)
 
 struct caam_alg_entry {
diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
index 8a07edb45dad..65399cb2a770 100644
--- a/drivers/crypto/caam/caamhash.c
+++ b/drivers/crypto/caam/caamhash.c
@@ -560,7 +560,7 @@ struct ahash_edesc {
 	dma_addr_t sec4_sg_dma;
 	int src_nents;
 	int sec4_sg_bytes;
-	u32 hw_desc[DESC_JOB_IO_LEN / sizeof(u32)] ____cacheline_aligned;
+	u32 hw_desc[DESC_JOB_IO_LEN_MAX / sizeof(u32)] ____cacheline_aligned;
 	struct sec4_sg_entry sec4_sg[0];
 };
 
diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c
index 7fbda1b08360..e8baacaabe07 100644
--- a/drivers/crypto/caam/caamrng.c
+++ b/drivers/crypto/caam/caamrng.c
@@ -53,7 +53,7 @@
 					 L1_CACHE_BYTES)
 
 /* length of descriptors */
-#define DESC_JOB_O_LEN			(CAAM_CMD_SZ * 2 + CAAM_PTR_SZ * 2)
+#define DESC_JOB_O_LEN			(CAAM_CMD_SZ * 2 + CAAM_PTR_SZ_MAX * 2)
 #define DESC_RNG_LEN			(3 * CAAM_CMD_SZ)
 
 /* Buffer, its dma address and lock */
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index 0b4007068c31..47b92451756f 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -602,6 +602,7 @@ static int caam_probe(struct platform_device *pdev)
 	caam_imx = (bool)imx_soc_match;
 
 	comp_params = rd_reg32(&ctrl->perfmon.comp_parms_ms);
+	caam_ptr_sz = sizeof(dma_addr_t);
 	caam_dpaa2 = !!(comp_params & CTPR_MS_DPAA2);
 	ctrlpriv->qi_present = !!(comp_params & CTPR_MS_QI_MASK);
 
diff --git a/drivers/crypto/caam/desc_constr.h b/drivers/crypto/caam/desc_constr.h
index 1fe50a4fefaa..89187831d74f 100644
--- a/drivers/crypto/caam/desc_constr.h
+++ b/drivers/crypto/caam/desc_constr.h
@@ -14,9 +14,14 @@
 
 #define IMMEDIATE (1 << 23)
 #define CAAM_CMD_SZ sizeof(u32)
-#define CAAM_PTR_SZ sizeof(dma_addr_t)
+#define CAAM_PTR_SZ caam_ptr_sz
+#define CAAM_PTR_SZ_MAX sizeof(dma_addr_t)
+#define CAAM_PTR_SZ_MIN sizeof(u32)
 #define CAAM_DESC_BYTES_MAX (CAAM_CMD_SZ * MAX_CAAM_DESCSIZE)
-#define DESC_JOB_IO_LEN (CAAM_CMD_SZ * 5 + CAAM_PTR_SZ * 3)
+#define __DESC_JOB_IO_LEN(n) (CAAM_CMD_SZ * 5 + (n) * 3)
+#define DESC_JOB_IO_LEN __DESC_JOB_IO_LEN(CAAM_PTR_SZ)
+#define DESC_JOB_IO_LEN_MAX __DESC_JOB_IO_LEN(CAAM_PTR_SZ_MAX)
+#define DESC_JOB_IO_LEN_MIN __DESC_JOB_IO_LEN(CAAM_PTR_SZ_MIN)
 
 /*
  * The CAAM QI hardware constructs a job descriptor which points
@@ -43,7 +48,7 @@
  * get loaded in deco buffer are '8' or '11'. The remaining words
  * in deco buffer can be used for storing shared descriptor.
  */
-#define MAX_SDLEN	((CAAM_DESC_BYTES_MAX - DESC_JOB_IO_LEN) / CAAM_CMD_SZ)
+#define MAX_SDLEN	((CAAM_DESC_BYTES_MAX - DESC_JOB_IO_LEN_MIN) / CAAM_CMD_SZ)
 
 #ifdef DEBUG
 #define PRINT_POS do { printk(KERN_DEBUG "%02d: %s\n", desc_len(desc),\
@@ -64,6 +69,7 @@
 			       (LDOFF_ENABLE_AUTO_NFIFO << LDST_OFFSET_SHIFT))
 
 extern bool caam_little_end;
+extern size_t caam_ptr_sz;
 
 /*
  * HW fetches 4 S/G table entries at a time, irrespective of how many entries
diff --git a/drivers/crypto/caam/error.c b/drivers/crypto/caam/error.c
index b7fbf1be37a4..17c6108b6d41 100644
--- a/drivers/crypto/caam/error.c
+++ b/drivers/crypto/caam/error.c
@@ -56,6 +56,9 @@ EXPORT_SYMBOL(caam_little_end);
 bool caam_imx;
 EXPORT_SYMBOL(caam_imx);
 
+size_t caam_ptr_sz;
+EXPORT_SYMBOL(caam_ptr_sz);
+
 static const struct {
 	u8 value;
 	const char *error_text;
-- 
2.21.0