Save and restore PCI states where ever needed.
Cc: Lucas De Marchi <lucas.demar...@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.v...@intel.com>
Signed-off-by: Aravind Iddamsetty <aravind.iddamse...@linux.intel.com>
---
drivers/gpu/drm/xe/xe_device_types.h | 3 ++
drivers/gpu/drm/xe/xe_pci.c | 48 ++++++++++++++++++++++++++--
drivers/gpu/drm/xe/xe_pci.h | 4 ++-
3 files changed, 51 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/xe/xe_device_types.h
b/drivers/gpu/drm/xe/xe_device_types.h
index 8244b177a6a3..0a66555229e9 100644
--- a/drivers/gpu/drm/xe/xe_device_types.h
+++ b/drivers/gpu/drm/xe/xe_device_types.h
@@ -462,6 +462,9 @@ struct xe_device {
/** @needs_flr_on_fini: requests function-reset on fini */
bool needs_flr_on_fini;
+ /** @pci_state: PCI state of device */
+ struct pci_saved_state *pci_state;
+
/* private: */
#if IS_ENABLED(CONFIG_DRM_XE_DISPLAY)
diff --git a/drivers/gpu/drm/xe/xe_pci.c b/drivers/gpu/drm/xe/xe_pci.c
index fa2cc80a08a3..f9957cd16356 100644
--- a/drivers/gpu/drm/xe/xe_pci.c
+++ b/drivers/gpu/drm/xe/xe_pci.c
@@ -391,6 +391,41 @@ MODULE_DEVICE_TABLE(pci, pciidlist);
#undef INTEL_VGA_DEVICE
+static bool xe_save_pci_state(struct pci_dev *pdev)
+{
+ struct xe_device *xe = pci_get_drvdata(pdev);
+
+ if (pci_save_state(pdev))
+ return false;
+
+ kfree(xe->pci_state);
+
+ xe->pci_state = pci_store_saved_state(pdev);
+ if (!xe->pci_state) {
+ drm_err(&xe->drm, "Failed to store PCI saved state\n");
+ return false;
+ }
+
+ return true;
+}
+
+void xe_load_pci_state(struct pci_dev *pdev)
+{
+ struct xe_device *xe = pci_get_drvdata(pdev);
+ int ret;
+
+ if (!xe->pci_state)
+ return;
+
+ ret = pci_load_saved_state(pdev, xe->pci_state);
+ if (ret) {
+ drm_warn(&xe->drm, "Failed to load PCI state err:%d\n", ret);
+ return;
+ }
+
+ pci_restore_state(pdev);
+}
+
/* is device_id present in comma separated list of ids */
static bool device_id_in_list(u16 device_id, const char *devices, bool
negative)
{
@@ -696,6 +731,8 @@ static void xe_pci_remove(struct pci_dev *pdev)
xe_device_remove(xe);
xe_pm_runtime_fini(xe);
+
+ kfree(xe->pci_state);
pci_set_drvdata(pdev, NULL);
}
@@ -792,6 +829,9 @@ static int xe_pci_probe(struct pci_dev *pdev, const struct
pci_device_id *ent)
drm_dbg(&xe->drm, "d3cold: capable=%s\n",
str_yes_no(xe->d3cold.capable));
+ if (xe_save_pci_state(pdev))
+ pci_restore_state(pdev);
+
return 0;
}
@@ -839,7 +879,7 @@ static int xe_pci_suspend(struct device *dev)
*/
d3cold_toggle(pdev, D3COLD_ENABLE);
- pci_save_state(pdev);
+ xe_save_pci_state(pdev);
pci_disable_device(pdev);
return 0;
@@ -863,6 +903,8 @@ static int xe_pci_resume(struct device *dev)
pci_set_master(pdev);
+ xe_load_pci_state(pdev);
+
err = xe_pm_resume(pdev_to_xe_device(pdev));
if (err)
return err;
@@ -880,7 +922,7 @@ static int xe_pci_runtime_suspend(struct device *dev)
if (err)
return err;
- pci_save_state(pdev);
+ xe_save_pci_state(pdev);
if (xe->d3cold.allowed) {
d3cold_toggle(pdev, D3COLD_ENABLE);
@@ -905,7 +947,7 @@ static int xe_pci_runtime_resume(struct device *dev)
if (err)
return err;
- pci_restore_state(pdev);
+ xe_load_pci_state(pdev);
if (xe->d3cold.allowed) {
err = pci_enable_device(pdev);
diff --git a/drivers/gpu/drm/xe/xe_pci.h b/drivers/gpu/drm/xe/xe_pci.h
index 611c1209b14c..73b90a430d1f 100644
--- a/drivers/gpu/drm/xe/xe_pci.h
+++ b/drivers/gpu/drm/xe/xe_pci.h
@@ -6,7 +6,9 @@
#ifndef _XE_PCI_H_
#define _XE_PCI_H_
+struct pci_dev;
+
int xe_register_pci_driver(void);
void xe_unregister_pci_driver(void);
-
+void xe_load_pci_state(struct pci_dev *pdev);
#endif
--
2.25.1
