- This is needed for avoiding problems with devices not being able to address
all the physical available memory.
Signed-off-by: Alejandro Lucero <alejandro.lucero at netronome.com>
---
lib/librte_eal/common/include/rte_memory.h | 6 ++++++
lib/librte_eal/linuxapp/eal/eal_memory.c | 27 +++++++++++++++++++++++++++
2 files changed, 33 insertions(+)
diff --git a/lib/librte_eal/common/include/rte_memory.h
b/lib/librte_eal/common/include/rte_memory.h
index f8dbece..67b0b28 100644
--- a/lib/librte_eal/common/include/rte_memory.h
+++ b/lib/librte_eal/common/include/rte_memory.h
@@ -256,6 +256,12 @@ rte_mem_phy2mch(uint32_t memseg_id __rte_unused, const
phys_addr_t phy_addr)
}
#endif
+/**
+ * Check hugepages are within the supported
+ * device address space range.
+ */
+int rte_eal_hugepage_check_address_mask(uint64_t dma_mask);
+
#ifdef __cplusplus
}
#endif
diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c
b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 5b9132c..2cd046d 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -1037,6 +1037,33 @@ calc_num_pages_per_socket(uint64_t * memory,
}
/*
+ * Some devices have addressing limitations. A PMD will indirectly call this
+ * function raising an error if any hugepage is out of address range supported.
+ * As hugepages are ordered by physical address, there is nothing to do as
+ * any other hugepage available will be out of range as well.
+ */
+int
+rte_eal_hugepage_check_address_mask(uint64_t dma_mask)
+{
+ const struct rte_mem_config *mcfg =
rte_eal_get_configuration()->mem_config;
+ phys_addr_t physaddr;
+ int i =0;
+
+ while (i < RTE_MAX_MEMSEG && mcfg->memseg[i].len > 0) {
+ physaddr = mcfg->memseg[i].phys_addr + mcfg->memseg[i].len;
+ RTE_LOG(DEBUG, EAL, "Checking page with address %"PRIx64" and
device"
+ " mask 0x%"PRIx64"\n", physaddr, dma_mask);
+ if (physaddr & ~dma_mask) {
+ RTE_LOG(ERR, EAL, "Allocated hugepages are out of
device address"
+ " range.");
+ return -1;
+ }
+ i++;
+ }
+ return 0;
+}
+
+/*
* Prepare physical memory mapping: fill configuration structure with
* these infos, return 0 on success.
* 1. map N huge pages in separate files in hugetlbfs
--
1.9.1
