From: Lance Richardson <lance.richardson@broadcom.com>
Date: Sat, 8 May 2021 14:27:53 +0000 (-0400)
Subject: eal: fix memory mapping on 32-bit target
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=6beb2d294743aad1488234109a3ad95a8d5a273f;p=dpdk.git

eal: fix memory mapping on 32-bit target

For 32-bit targets, size_t is normally a 32-bit type and
does not have sufficient range to represent 64-bit offsets
that are needed when mapping PCI addresses.
Use uint64_t instead.

Found when attempting to run 32-bit Linux dpdk-testpmd
using VFIO driver:

    EAL: pci_map_resource(): cannot map resource(63, 0xc0010000, \
    0x200000, 0x20000000000): Invalid argument ((nil))

Fixes: c4b89ecb64ea ("eal: introduce memory management wrappers")
Cc: stable@dpdk.org

Signed-off-by: Lance Richardson <lance.richardson@broadcom.com>
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
---

diff --git a/lib/eal/include/rte_eal_paging.h b/lib/eal/include/rte_eal_paging.h
index ed98e70e9e..c60317d0f5 100644
--- a/lib/eal/include/rte_eal_paging.h
+++ b/lib/eal/include/rte_eal_paging.h
@@ -61,7 +61,7 @@ enum rte_map_flags {
 __rte_internal
 void *
 rte_mem_map(void *requested_addr, size_t size, int prot, int flags,
-	int fd, size_t offset);
+	int fd, uint64_t offset);
 
 /**
  * OS-independent implementation of POSIX munmap(3).
diff --git a/lib/eal/unix/eal_unix_memory.c b/lib/eal/unix/eal_unix_memory.c
index ec7156df96..68ae93bd6e 100644
--- a/lib/eal/unix/eal_unix_memory.c
+++ b/lib/eal/unix/eal_unix_memory.c
@@ -5,6 +5,7 @@
 #include <string.h>
 #include <sys/mman.h>
 #include <unistd.h>
+#include <inttypes.h>
 
 #include <rte_eal_paging.h>
 #include <rte_errno.h>
@@ -24,14 +25,14 @@
 
 static void *
 mem_map(void *requested_addr, size_t size, int prot, int flags,
-	int fd, size_t offset)
+	int fd, uint64_t offset)
 {
 	void *virt = mmap(requested_addr, size, prot, flags, fd, offset);
 	if (virt == MAP_FAILED) {
 		RTE_LOG(DEBUG, EAL,
-			"Cannot mmap(%p, 0x%zx, 0x%x, 0x%x, %d, 0x%zx): %s\n",
-			requested_addr, size, prot, flags, fd, offset,
-			strerror(errno));
+		    "Cannot mmap(%p, 0x%zx, 0x%x, 0x%x, %d, 0x%"PRIx64"): %s\n",
+		    requested_addr, size, prot, flags, fd, offset,
+		    strerror(errno));
 		rte_errno = errno;
 		return NULL;
 	}
@@ -106,7 +107,7 @@ mem_rte_to_sys_prot(int prot)
 
 void *
 rte_mem_map(void *requested_addr, size_t size, int prot, int flags,
-	int fd, size_t offset)
+	int fd, uint64_t offset)
 {
 	int sys_flags = 0;
 	int sys_prot;
diff --git a/lib/eal/windows/eal_memory.c b/lib/eal/windows/eal_memory.c
index 2cf5a5e649..4db048ccb5 100644
--- a/lib/eal/windows/eal_memory.c
+++ b/lib/eal/windows/eal_memory.c
@@ -508,7 +508,7 @@ eal_mem_set_dump(void *virt, size_t size, bool dump)
 
 void *
 rte_mem_map(void *requested_addr, size_t size, int prot, int flags,
-	int fd, size_t offset)
+	int fd, uint64_t offset)
 {
 	HANDLE file_handle = INVALID_HANDLE_VALUE;
 	HANDLE mapping_handle = INVALID_HANDLE_VALUE;