nvme: Enable PCI bus mastering

U-Boot sets up devices ready for use, but coreboot does not. Enable this
so that NVMe works OK from coreboot.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

diff --git a/drivers/nvme/nvme_pci.c b/drivers/nvme/nvme_pci.c
index 36bf9c5..5bb43d2 100644 (file)
--- a/drivers/nvme/nvme_pci.c
+++ b/drivers/nvme/nvme_pci.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <init.h>
 #include <pci.h>
 #include "nvme.h"
 
@@ -30,6 +31,10 @@ static int nvme_probe(struct udevice *udev)
        ndev->instance = trailing_strtol(udev->name);
        ndev->bar = dm_pci_map_bar(udev, PCI_BASE_ADDRESS_0, 0, 0,
                                   PCI_REGION_TYPE, PCI_REGION_MEM);
+
+       /* Turn on bus-mastering */
+       dm_pci_clrset_config16(udev, PCI_COMMAND, 0, PCI_COMMAND_MASTER);
+
        return nvme_init(udev);
 }