From: Sean Anderson <seanga2@gmail.com>
Date: Sat, 4 Nov 2023 20:37:45 +0000 (-0400)
Subject: cmd: nand: Map memory before accessing it
X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=d2e0a9a6918503ff6fd649189427413935535040;p=u-boot.git

cmd: nand: Map memory before accessing it

In sandbox, all memory must be mapped before accessing it. Do so for the
nand command.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
---

diff --git a/cmd/nand.c b/cmd/nand.c
index 71b8f96442..fe834c4ac5 100644
--- a/cmd/nand.c
+++ b/cmd/nand.c
@@ -34,6 +34,7 @@
 #include <env.h>
 #include <watchdog.h>
 #include <malloc.h>
+#include <mapmem.h>
 #include <asm/byteorder.h>
 #include <jffs2/jffs2.h>
 #include <nand.h>
@@ -432,7 +433,7 @@ static void nand_print_and_set_info(int idx)
 	env_set_hex("nand_erasesize", mtd->erasesize);
 }
 
-static int raw_access(struct mtd_info *mtd, ulong addr, loff_t off,
+static int raw_access(struct mtd_info *mtd, void *buf, loff_t off,
 		      ulong count, int read, int no_verify)
 {
 	int ret = 0;
@@ -440,8 +441,8 @@ static int raw_access(struct mtd_info *mtd, ulong addr, loff_t off,
 	while (count--) {
 		/* Raw access */
 		mtd_oob_ops_t ops = {
-			.datbuf = (u8 *)addr,
-			.oobbuf = ((u8 *)addr) + mtd->writesize,
+			.datbuf = buf,
+			.oobbuf = buf + mtd->writesize,
 			.len = mtd->writesize,
 			.ooblen = mtd->oobsize,
 			.mode = MTD_OPS_RAW
@@ -461,7 +462,7 @@ static int raw_access(struct mtd_info *mtd, ulong addr, loff_t off,
 			break;
 		}
 
-		addr += mtd->writesize + mtd->oobsize;
+		buf += mtd->writesize + mtd->oobsize;
 		off += mtd->writesize;
 	}
 
@@ -675,6 +676,7 @@ static int do_nand(struct cmd_tbl *cmdtp, int flag, int argc,
 		int read;
 		int raw = 0;
 		int no_verify = 0;
+		void *buf;
 
 		if (argc < 4)
 			goto usage;
@@ -730,32 +732,32 @@ static int do_nand(struct cmd_tbl *cmdtp, int flag, int argc,
 		}
 
 		mtd = get_nand_dev_by_index(dev);
+		buf = map_sysmem(addr, maxsize);
 
 		if (!s || !strcmp(s, ".jffs2") ||
 		    !strcmp(s, ".e") || !strcmp(s, ".i")) {
 			if (read)
 				ret = nand_read_skip_bad(mtd, off, &rwsize,
-							 NULL, maxsize,
-							 (u_char *)addr);
+							 NULL, maxsize, buf);
 			else
 				ret = nand_write_skip_bad(mtd, off, &rwsize,
-							  NULL, maxsize,
-							  (u_char *)addr,
+							  NULL, maxsize, buf,
 							  WITH_WR_VERIFY);
 #ifdef CONFIG_CMD_NAND_TRIMFFS
 		} else if (!strcmp(s, ".trimffs")) {
 			if (read) {
 				printf("Unknown nand command suffix '%s'\n", s);
+				unmap_sysmem(buf);
 				return 1;
 			}
 			ret = nand_write_skip_bad(mtd, off, &rwsize, NULL,
-						maxsize, (u_char *)addr,
+						maxsize, buf,
 						WITH_DROP_FFS | WITH_WR_VERIFY);
 #endif
 		} else if (!strcmp(s, ".oob")) {
 			/* out-of-band data */
 			mtd_oob_ops_t ops = {
-				.oobbuf = (u8 *)addr,
+				.oobbuf = buf,
 				.ooblen = rwsize,
 				.mode = MTD_OPS_RAW
 			};
@@ -765,13 +767,15 @@ static int do_nand(struct cmd_tbl *cmdtp, int flag, int argc,
 			else
 				ret = mtd_write_oob(mtd, off, &ops);
 		} else if (raw) {
-			ret = raw_access(mtd, addr, off, pagecount, read,
+			ret = raw_access(mtd, buf, off, pagecount, read,
 					 no_verify);
 		} else {
 			printf("Unknown nand command suffix '%s'.\n", s);
+			unmap_sysmem(buf);
 			return 1;
 		}
 
+		unmap_sysmem(buf);
 		printf(" %zu bytes %s: %s\n", rwsize,
 		       read ? "read" : "written", ret ? "ERROR" : "OK");