From: Simon Glass <sjg@chromium.org>
Date: Thu, 4 May 2023 22:55:07 +0000 (-0600)
Subject: nvme: Enable PCI bus mastering
X-Git-Url: http://git.dujemihanovic.xyz/%22http:/www.sics.se/static/git-logo.png?a=commitdiff_plain;h=38534712cd4c4d8acdf760ee87ba219f82d738c9;p=u-boot.git

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 36bf9c5ffb..5bb43d299f 100644
--- 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);
 }