Devices can have addressing limitations and a driver can set a dma
mask. This patch adds a function for checking hugepages iovas are within
the range supported by the dma mask.
Signed-off-by: Alejandro Lucero <alejandro.luc...@netronome.com>
---
lib/librte_eal/linuxapp/eal/eal_memory.c | 36 ++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c
b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 17c20d4..4c196a6 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -1334,6 +1334,42 @@ void numa_error(char *where)
return -1;
}
+int
+rte_eal_memory_dma_mask_check(void)
+{
+ struct rte_mem_config *mcfg;
+ int i;
+ int total_segs_checked = 0;
+ uint64_t mask;
+
+ if (!internal_config.dma_mask)
+ return 0;
+
+ mask = 1ULL << internal_config.dma_mask;
+ mask -= 1;
+
+ /* get pointer to global configuration */
+ mcfg = rte_eal_get_configuration()->mem_config;
+
+ for (i = 0; i < RTE_MAX_MEMSEG; i++) {
+ RTE_LOG(DEBUG, EAL, "Memseg %d with iova %"PRIx64" and mask
%"PRIx64"\n", i,
+ mcfg->memseg[i].iova, mask);
+
+ if (!mcfg->memseg[i].iova)
+ break;
+
+ if (mcfg->memseg[i].iova & ~mask) {
+ return -1;
+ }
+ total_segs_checked++;
+ }
+
+ RTE_LOG(DEBUG, EAL, "ALEJ: %d segments successfully checked with dma
mask\n",
+ total_segs_checked);
+
+ return 0;
+}
+
/*
* uses fstat to report the size of a file on disk
*/
--
1.9.1
