bus/pci: avoid call to DMA mask check

Calling rte_mem_check_dma_mask when memory has not been initialized
yet is wrong. This patch use rte_mem_set_dma_mask instead.

Once memory initialization is done, the dma mask set will be used
for checking memory mapped is within the specified mask.

Fixes: fe822eb8c565 ("bus/pci: use IOVA DMA mask check when setting IOVA mode")

Signed-off-by: Alejandro Lucero <alejandro.lucero@netronome.com>
Tested-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/drivers/bus/pci/linux/pci.c b/drivers/bus/pci/linux/pci.c
index 7576b0e..f87533c 100644 (file)
--- a/drivers/bus/pci/linux/pci.c
+++ b/drivers/bus/pci/linux/pci.c
@@ -615,7 +615,16 @@ pci_one_device_iommu_support_va(struct rte_pci_device *dev)
 
        mgaw = ((vtd_cap_reg & VTD_CAP_MGAW_MASK) >> VTD_CAP_MGAW_SHIFT) + 1;
 
-       return rte_mem_check_dma_mask(mgaw) == 0 ? true : false;
+       /*
+        * Assuming there is no limitation by now. We can not know at this point
+        * because the memory has not been initialized yet. Setting the dma mask
+        * will force a check once memory initialization is done. We can not do
+        * a fallback to IOVA PA now, but if the dma check fails, the error
+        * message should advice for using '--iova-mode pa' if IOVA VA is the
+        * current mode.
+        */
+       rte_mem_set_dma_mask(mgaw);
+       return true;
 }
 #elif defined(RTE_ARCH_PPC_64)
 static bool