From af6d28024743b8b72ebb5b59affe5a1c248f3cea Mon Sep 17 00:00:00 2001
From: paul luse <paul.e.luse@intel.com>
Date: Wed, 5 Jan 2022 14:38:52 -0700
Subject: [PATCH] idxd: disable the idxd device on shutdown

Required by spec.

Signed-off-by: paul luse <paul.e.luse@intel.com>
Change-Id: Ib13ca2d7ab7045a87ddc483dc1f70e649b3b9294
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/10982
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: John Kariuki <John.K.Kariuki@intel.com>
Reviewed-by: Monica Kenguva <monica.kenguva@intel.com>
---
 lib/idxd/idxd_user.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/lib/idxd/idxd_user.c b/lib/idxd/idxd_user.c
index 9e4e406db..27ff4e1a1 100644
--- a/lib/idxd/idxd_user.c
+++ b/lib/idxd/idxd_user.c
@@ -180,6 +180,18 @@ idxd_map_pci_bars(struct spdk_idxd_device *idxd)
 	return 0;
 }
 
+static void
+idxd_disable_dev(struct spdk_idxd_device *idxd)
+{
+	int rc;
+
+	_idxd_write_4(idxd, IDXD_CMD_OFFSET, IDXD_DISABLE_DEV << IDXD_CMD_SHIFT);
+	rc = idxd_wait_cmd(idxd, IDXD_REGISTER_TIMEOUT_US);
+	if (rc < 0) {
+		SPDK_ERRLOG("Error disabling device %u\n", rc);
+	}
+}
+
 static int
 idxd_reset_dev(struct spdk_idxd_device *idxd)
 {
@@ -427,6 +439,8 @@ user_idxd_device_destruct(struct spdk_idxd_device *idxd)
 {
 	struct spdk_user_idxd_device *user_idxd = __user_idxd(idxd);
 
+	idxd_disable_dev(idxd);
+
 	idxd_unmap_pci_bar(idxd, IDXD_MMIO_BAR);
 	idxd_unmap_pci_bar(idxd, IDXD_WQ_BAR);
 	free(idxd->groups);