crypto: caam/jr - add support for DPAA2 parts

Add support for using the caam/jr backend on DPAA2-based SoCs.
These have some particularities we have to account for:
-HW S/G format is different
-Management Complex (MC) firmware initializes / manages (partially)
the CAAM block: MCFGR, QI enablement in QICTL, RNG

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/caam/caamhash.c

@@ -791,8 +791,8 @@ static int ahash_update_ctx(struct ahash_request *req)
 							 to_hash - *buflen,
 							 *next_buflen, 0);
 		} else {
-			(edesc->sec4_sg + sec4_sg_src_index - 1)->len |=
-				cpu_to_caam32(SEC4_SG_LEN_FIN);
+			sg_to_sec4_set_last(edesc->sec4_sg + sec4_sg_src_index -
+					    1);
 		}
 
 		desc = edesc->hw_desc;
@@ -882,8 +882,7 @@ static int ahash_final_ctx(struct ahash_request *req)
 	if (ret)
 		goto unmap_ctx;
 
-	(edesc->sec4_sg + sec4_sg_src_index - 1)->len |=
-		cpu_to_caam32(SEC4_SG_LEN_FIN);
+	sg_to_sec4_set_last(edesc->sec4_sg + sec4_sg_src_index - 1);
 
 	edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
 					    sec4_sg_bytes, DMA_TO_DEVICE);

drivers/crypto/caam/ctrl.c

@@ -17,6 +17,8 @@
 
 bool caam_little_end;
 EXPORT_SYMBOL(caam_little_end);
+bool caam_dpaa2;
+EXPORT_SYMBOL(caam_dpaa2);
 
 #ifdef CONFIG_CAAM_QI
 #include "qi.h"
@@ -319,8 +321,11 @@ static int caam_remove(struct platform_device *pdev)
 		caam_qi_shutdown(ctrlpriv->qidev);
 #endif
 
-	/* De-initialize RNG state handles initialized by this driver. */
-	if (ctrlpriv->rng4_sh_init)
+	/*
+	 * De-initialize RNG state handles initialized by this driver.
+	 * In case of DPAA 2.x, RNG is managed by MC firmware.
+	 */
+	if (!caam_dpaa2 && ctrlpriv->rng4_sh_init)
 		deinstantiate_rng(ctrldev, ctrlpriv->rng4_sh_init);
 
 	/* Shut down debug views */
@@ -552,12 +557,17 @@ static int caam_probe(struct platform_device *pdev)
 
 	/*
 	 * Enable DECO watchdogs and, if this is a PHYS_ADDR_T_64BIT kernel,
-	 * long pointers in master configuration register
+	 * long pointers in master configuration register.
+	 * In case of DPAA 2.x, Management Complex firmware performs
+	 * the configuration.
 	 */
-	clrsetbits_32(&ctrl->mcr, MCFGR_AWCACHE_MASK | MCFGR_LONG_PTR,
-		      MCFGR_AWCACHE_CACH | MCFGR_AWCACHE_BUFF |
-		      MCFGR_WDENABLE | MCFGR_LARGE_BURST |
-		      (sizeof(dma_addr_t) == sizeof(u64) ? MCFGR_LONG_PTR : 0));
+	caam_dpaa2 = !!(comp_params & CTPR_MS_DPAA2);
+	if (!caam_dpaa2)
+		clrsetbits_32(&ctrl->mcr, MCFGR_AWCACHE_MASK | MCFGR_LONG_PTR,
+			      MCFGR_AWCACHE_CACH | MCFGR_AWCACHE_BUFF |
+			      MCFGR_WDENABLE | MCFGR_LARGE_BURST |
+			      (sizeof(dma_addr_t) == sizeof(u64) ?
+			       MCFGR_LONG_PTR : 0));
 
 	/*
 	 *  Read the Compile Time paramters and SCFGR to determine
@@ -586,7 +596,9 @@ static int caam_probe(struct platform_device *pdev)
 			      JRSTART_JR3_START);
 
 	if (sizeof(dma_addr_t) == sizeof(u64)) {
-		if (of_device_is_compatible(nprop, "fsl,sec-v5.0"))
+		if (caam_dpaa2)
+			ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(49));
+		else if (of_device_is_compatible(nprop, "fsl,sec-v5.0"))
 			ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
 		else
 			ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(36));
@@ -629,11 +641,9 @@ static int caam_probe(struct platform_device *pdev)
 			ring++;
 		}
 
-	/* Check to see if QI present. If so, enable */
-	ctrlpriv->qi_present =
-			!!(rd_reg32(&ctrl->perfmon.comp_parms_ms) &
-			   CTPR_MS_QI_MASK);
-	if (ctrlpriv->qi_present) {
+	/* Check to see if (DPAA 1.x) QI present. If so, enable */
+	ctrlpriv->qi_present = !!(comp_params & CTPR_MS_QI_MASK);
+	if (ctrlpriv->qi_present && !caam_dpaa2) {
 		ctrlpriv->qi = (struct caam_queue_if __iomem __force *)
 			       ((__force uint8_t *)ctrl +
 				 BLOCK_OFFSET * QI_BLOCK_NUMBER
@@ -661,8 +671,10 @@ static int caam_probe(struct platform_device *pdev)
 	/*
 	 * If SEC has RNG version >= 4 and RNG state handle has not been
 	 * already instantiated, do RNG instantiation
+	 * In case of DPAA 2.x, RNG is managed by MC firmware.
 	 */
-	if ((cha_vid_ls & CHA_ID_LS_RNG_MASK) >> CHA_ID_LS_RNG_SHIFT >= 4) {
+	if (!caam_dpaa2 &&
+	    (cha_vid_ls & CHA_ID_LS_RNG_MASK) >> CHA_ID_LS_RNG_SHIFT >= 4) {
 		ctrlpriv->rng4_sh_init =
 			rd_reg32(&ctrl->r4tst[0].rdsta);
 		/*
@@ -730,8 +742,9 @@ static int caam_probe(struct platform_device *pdev)
 	/* Report "alive" for developer to see */
 	dev_info(dev, "device ID = 0x%016llx (Era %d)\n", caam_id,
 		 caam_get_era());
-	dev_info(dev, "job rings = %d, qi = %d\n",
-		 ctrlpriv->total_jobrs, ctrlpriv->qi_present);
+	dev_info(dev, "job rings = %d, qi = %d, dpaa2 = %s\n",
+		 ctrlpriv->total_jobrs, ctrlpriv->qi_present,
+		 caam_dpaa2 ? "yes" : "no");
 
 #ifdef CONFIG_DEBUG_FS
 

drivers/crypto/caam/ctrl.h

@@ -10,4 +10,6 @@
 /* Prototypes for backend-level services exposed to APIs */
 int caam_get_era(void);
 
+extern bool caam_dpaa2;
+
 #endif /* CTRL_H */

drivers/crypto/caam/jr.c

@@ -9,6 +9,7 @@
 #include <linux/of_address.h>
 
 #include "compat.h"
+#include "ctrl.h"
 #include "regs.h"
 #include "jr.h"
 #include "desc.h"
@@ -499,7 +500,11 @@ static int caam_jr_probe(struct platform_device *pdev)
 	jrpriv->rregs = (struct caam_job_ring __iomem __force *)ctrl;
 
 	if (sizeof(dma_addr_t) == sizeof(u64)) {
-		if (of_device_is_compatible(nprop, "fsl,sec-v5.0-job-ring"))
+		if (caam_dpaa2)
+			error = dma_set_mask_and_coherent(jrdev,
+							  DMA_BIT_MASK(49));
+		else if (of_device_is_compatible(nprop,
+						 "fsl,sec-v5.0-job-ring"))
 			error = dma_set_mask_and_coherent(jrdev,
 							  DMA_BIT_MASK(40));
 		else

drivers/crypto/caam/regs.h

@@ -293,6 +293,7 @@ struct caam_perfmon {
 	u32 cha_rev_ls;		/* CRNR - CHA Rev No. Least significant half*/
 #define CTPR_MS_QI_SHIFT	25
 #define CTPR_MS_QI_MASK		(0x1ull << CTPR_MS_QI_SHIFT)
+#define CTPR_MS_DPAA2		BIT(13)
 #define CTPR_MS_VIRT_EN_INCL	0x00000001
 #define CTPR_MS_VIRT_EN_POR	0x00000002
 #define CTPR_MS_PG_SZ_MASK	0x10

drivers/crypto/caam/sg_sw_qm2.h

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2015-2016 Freescale Semiconductor, Inc.
+ * Copyright 2017 NXP
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *	 notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *	 notice, this list of conditions and the following disclaimer in the
+ *	 documentation and/or other materials provided with the distribution.
+ *     * Neither the names of the above-listed copyright holders nor the
+ *	 names of any contributors may be used to endorse or promote products
+ *	 derived from this software without specific prior written permission.
+ *
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _SG_SW_QM2_H_
+#define _SG_SW_QM2_H_
+
+#include "../../../drivers/staging/fsl-mc/include/dpaa2-fd.h"
+
+static inline void dma_to_qm_sg_one(struct dpaa2_sg_entry *qm_sg_ptr,
+				    dma_addr_t dma, u32 len, u16 offset)
+{
+	dpaa2_sg_set_addr(qm_sg_ptr, dma);
+	dpaa2_sg_set_format(qm_sg_ptr, dpaa2_sg_single);
+	dpaa2_sg_set_final(qm_sg_ptr, false);
+	dpaa2_sg_set_len(qm_sg_ptr, len);
+	dpaa2_sg_set_bpid(qm_sg_ptr, 0);
+	dpaa2_sg_set_offset(qm_sg_ptr, offset);
+}
+
+/*
+ * convert scatterlist to h/w link table format
+ * but does not have final bit; instead, returns last entry
+ */
+static inline struct dpaa2_sg_entry *
+sg_to_qm_sg(struct scatterlist *sg, int sg_count,
+	    struct dpaa2_sg_entry *qm_sg_ptr, u16 offset)
+{
+	while (sg_count && sg) {
+		dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg),
+				 sg_dma_len(sg), offset);
+		qm_sg_ptr++;
+		sg = sg_next(sg);
+		sg_count--;
+	}
+	return qm_sg_ptr - 1;
+}
+
+/*
+ * convert scatterlist to h/w link table format
+ * scatterlist must have been previously dma mapped
+ */
+static inline void sg_to_qm_sg_last(struct scatterlist *sg, int sg_count,
+				    struct dpaa2_sg_entry *qm_sg_ptr,
+				    u16 offset)
+{
+	qm_sg_ptr = sg_to_qm_sg(sg, sg_count, qm_sg_ptr, offset);
+	dpaa2_sg_set_final(qm_sg_ptr, true);
+}
+
+#endif /* _SG_SW_QM2_H_ */

drivers/crypto/caam/sg_sw_sec4.h

@@ -5,7 +5,13 @@
  *
  */
 
+#ifndef _SG_SW_SEC4_H_
+#define _SG_SW_SEC4_H_
+
+#include "ctrl.h"
 #include "regs.h"
+#include "sg_sw_qm2.h"
+#include "../../../drivers/staging/fsl-mc/include/dpaa2-fd.h"
 
 struct sec4_sg_entry {
 	u64 ptr;
@@ -19,9 +25,15 @@ struct sec4_sg_entry {
 static inline void dma_to_sec4_sg_one(struct sec4_sg_entry *sec4_sg_ptr,
 				      dma_addr_t dma, u32 len, u16 offset)
 {
-	sec4_sg_ptr->ptr = cpu_to_caam_dma64(dma);
-	sec4_sg_ptr->len = cpu_to_caam32(len);
-	sec4_sg_ptr->bpid_offset = cpu_to_caam32(offset & SEC4_SG_OFFSET_MASK);
+	if (caam_dpaa2) {
+		dma_to_qm_sg_one((struct dpaa2_sg_entry *)sec4_sg_ptr, dma, len,
+				 offset);
+	} else {
+		sec4_sg_ptr->ptr = cpu_to_caam_dma64(dma);
+		sec4_sg_ptr->len = cpu_to_caam32(len);
+		sec4_sg_ptr->bpid_offset = cpu_to_caam32(offset &
+							 SEC4_SG_OFFSET_MASK);
+	}
 #ifdef DEBUG
 	print_hex_dump(KERN_ERR, "sec4_sg_ptr@: ",
 		       DUMP_PREFIX_ADDRESS, 16, 4, sec4_sg_ptr,
@@ -47,6 +59,14 @@ sg_to_sec4_sg(struct scatterlist *sg, int sg_count,
 	return sec4_sg_ptr - 1;
 }
 
+static inline void sg_to_sec4_set_last(struct sec4_sg_entry *sec4_sg_ptr)
+{
+	if (caam_dpaa2)
+		dpaa2_sg_set_final((struct dpaa2_sg_entry *)sec4_sg_ptr, true);
+	else
+		sec4_sg_ptr->len |= cpu_to_caam32(SEC4_SG_LEN_FIN);
+}
+
 /*
  * convert scatterlist to h/w link table format
  * scatterlist must have been previously dma mapped
@@ -56,5 +76,7 @@ static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int sg_count,
 				      u16 offset)
 {
 	sec4_sg_ptr = sg_to_sec4_sg(sg, sg_count, sec4_sg_ptr, offset);
-	sec4_sg_ptr->len |= cpu_to_caam32(SEC4_SG_LEN_FIN);
+	sg_to_sec4_set_last(sec4_sg_ptr);
 }
+
+#endif /* _SG_SW_SEC4_H_ */