[PATCH 00/20] GSC support for XeHP SDV and DG2 platforms

[PATCH 00/20] GSC support for XeHP SDV and DG2 platforms

[Alexander Usyskin]

Add GSC support for XeHP SDV and DG2 platforms.

The series includes changes for the mei driver:
- add ability to use polling instead of interrupts
- add ability to use extended timeouts
- setup extended operational memory for GSC

The series includes changes for the i915 driver:
- allocate extended operational memory for GSC
- GSC on XeHP SDV offsets and definitions
- GSC on DG2 offsets and definitions

The first six patches of the series are copied from the
already reviewed series [1] to provide series that
can be built in CI.
This series will be rebased and merged only after
series [1] merge.

Greg KH, please review and ACK the MEI patches.
We are pushing these patches through gfx tree as
the auxiliary device belongs there.

[1] https://patchwork.freedesktop.org/series/102160/

Alexander Usyskin (7):
  mei: gsc: setup char driver alive in spite of firmware handshake
    failure
  mei: gsc: retrieve the firmware version
  drm/i915/gsc: add slow_fw flag to the mei auxiliary device
  drm/i915/gsc: add slow_fw flag to the gsc device definition
  drm/i915/gsc: add GSC XeHP SDV platform definition
  mei: gsc: wait for reset thread on stop
  mei: extend timeouts on slow devices.

Daniele Ceraolo Spurio (1):
  HAX: drm/i915: force INTEL_MEI_GSC on for CI

Tomas Winkler (9):
  drm/i915/gsc: add gsc as a mei auxiliary device
  mei: add support for graphics system controller (gsc) devices
  mei: gsc: add runtime pm handlers
  mei: gsc: use polling instead of interrupts
  drm/i915/dg2: add gsc with special gsc bar offsets
  mei: mkhi: add memory ready command
  mei: gsc: setup gsc extended operational memory
  mei: debugfs: add pxp mode to devstate in debugfs
  drm/i915/gsc: allocate extended operational memory in LMEM

Vitaly Lubart (3):
  drm/i915/gsc: skip irq initialization if using polling
  mei: bus: export common mkhi definitions into a separate header
  mei: gsc: add transition to PXP mode in resume flow

 MAINTAINERS                              |   1 +
 drivers/gpu/drm/i915/Kconfig             |   1 +
 drivers/gpu/drm/i915/Kconfig.debug       |   1 +
 drivers/gpu/drm/i915/Makefile            |   3 +
 drivers/gpu/drm/i915/gt/intel_gsc.c      | 323 +++++++++++++++++++++++
 drivers/gpu/drm/i915/gt/intel_gsc.h      |  40 +++
 drivers/gpu/drm/i915/gt/intel_gt.c       |   3 +
 drivers/gpu/drm/i915/gt/intel_gt.h       |   5 +
 drivers/gpu/drm/i915/gt/intel_gt_irq.c   |  13 +
 drivers/gpu/drm/i915/gt/intel_gt_regs.h  |   1 +
 drivers/gpu/drm/i915/gt/intel_gt_types.h |   2 +
 drivers/gpu/drm/i915/i915_drv.h          |   8 +
 drivers/gpu/drm/i915/i915_pci.c          |   4 +-
 drivers/gpu/drm/i915/i915_reg.h          |   4 +
 drivers/gpu/drm/i915/intel_device_info.h |   2 +
 drivers/misc/mei/Kconfig                 |  14 +
 drivers/misc/mei/Makefile                |   3 +
 drivers/misc/mei/bus-fixup.c             | 128 ++++++---
 drivers/misc/mei/client.c                |  14 +-
 drivers/misc/mei/debugfs.c               |  17 ++
 drivers/misc/mei/gsc-me.c                | 316 ++++++++++++++++++++++
 drivers/misc/mei/hbm.c                   |  12 +-
 drivers/misc/mei/hw-me-regs.h            |   7 +
 drivers/misc/mei/hw-me.c                 | 145 ++++++++--
 drivers/misc/mei/hw-me.h                 |  16 +-
 drivers/misc/mei/hw-txe.c                |   2 +-
 drivers/misc/mei/hw.h                    |   5 +
 drivers/misc/mei/init.c                  |  21 +-
 drivers/misc/mei/main.c                  |   2 +-
 drivers/misc/mei/mei_dev.h               |  26 ++
 drivers/misc/mei/mkhi.h                  |  57 ++++
 drivers/misc/mei/pci-me.c                |   2 +-
 include/linux/mei_aux.h                  |  21 ++
 33 files changed, 1146 insertions(+), 73 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/gt/intel_gsc.c
 create mode 100644 drivers/gpu/drm/i915/gt/intel_gsc.h
 create mode 100644 drivers/misc/mei/gsc-me.c
 create mode 100644 drivers/misc/mei/mkhi.h
 create mode 100644 include/linux/mei_aux.h

-- 
2.32.0

[Intel-gfx] [PATCH 00/20] GSC support for XeHP SDV and DG2 platforms

[Alexander Usyskin]

Add GSC support for XeHP SDV and DG2 platforms.

The series includes changes for the mei driver:
- add ability to use polling instead of interrupts
- add ability to use extended timeouts
- setup extended operational memory for GSC

The series includes changes for the i915 driver:
- allocate extended operational memory for GSC
- GSC on XeHP SDV offsets and definitions
- GSC on DG2 offsets and definitions

The first six patches of the series are copied from the
already reviewed series [1] to provide series that
can be built in CI.
This series will be rebased and merged only after
series [1] merge.

Greg KH, please review and ACK the MEI patches.
We are pushing these patches through gfx tree as
the auxiliary device belongs there.

[1] https://patchwork.freedesktop.org/series/102160/

Alexander Usyskin (7):
  mei: gsc: setup char driver alive in spite of firmware handshake
    failure
  mei: gsc: retrieve the firmware version
  drm/i915/gsc: add slow_fw flag to the mei auxiliary device
  drm/i915/gsc: add slow_fw flag to the gsc device definition
  drm/i915/gsc: add GSC XeHP SDV platform definition
  mei: gsc: wait for reset thread on stop
  mei: extend timeouts on slow devices.

Daniele Ceraolo Spurio (1):
  HAX: drm/i915: force INTEL_MEI_GSC on for CI

Tomas Winkler (9):
  drm/i915/gsc: add gsc as a mei auxiliary device
  mei: add support for graphics system controller (gsc) devices
  mei: gsc: add runtime pm handlers
  mei: gsc: use polling instead of interrupts
  drm/i915/dg2: add gsc with special gsc bar offsets
  mei: mkhi: add memory ready command
  mei: gsc: setup gsc extended operational memory
  mei: debugfs: add pxp mode to devstate in debugfs
  drm/i915/gsc: allocate extended operational memory in LMEM

Vitaly Lubart (3):
  drm/i915/gsc: skip irq initialization if using polling
  mei: bus: export common mkhi definitions into a separate header
  mei: gsc: add transition to PXP mode in resume flow

 MAINTAINERS                              |   1 +
 drivers/gpu/drm/i915/Kconfig             |   1 +
 drivers/gpu/drm/i915/Kconfig.debug       |   1 +
 drivers/gpu/drm/i915/Makefile            |   3 +
 drivers/gpu/drm/i915/gt/intel_gsc.c      | 323 +++++++++++++++++++++++
 drivers/gpu/drm/i915/gt/intel_gsc.h      |  40 +++
 drivers/gpu/drm/i915/gt/intel_gt.c       |   3 +
 drivers/gpu/drm/i915/gt/intel_gt.h       |   5 +
 drivers/gpu/drm/i915/gt/intel_gt_irq.c   |  13 +
 drivers/gpu/drm/i915/gt/intel_gt_regs.h  |   1 +
 drivers/gpu/drm/i915/gt/intel_gt_types.h |   2 +
 drivers/gpu/drm/i915/i915_drv.h          |   8 +
 drivers/gpu/drm/i915/i915_pci.c          |   4 +-
 drivers/gpu/drm/i915/i915_reg.h          |   4 +
 drivers/gpu/drm/i915/intel_device_info.h |   2 +
 drivers/misc/mei/Kconfig                 |  14 +
 drivers/misc/mei/Makefile                |   3 +
 drivers/misc/mei/bus-fixup.c             | 128 ++++++---
 drivers/misc/mei/client.c                |  14 +-
 drivers/misc/mei/debugfs.c               |  17 ++
 drivers/misc/mei/gsc-me.c                | 316 ++++++++++++++++++++++
 drivers/misc/mei/hbm.c                   |  12 +-
 drivers/misc/mei/hw-me-regs.h            |   7 +
 drivers/misc/mei/hw-me.c                 | 145 ++++++++--
 drivers/misc/mei/hw-me.h                 |  16 +-
 drivers/misc/mei/hw-txe.c                |   2 +-
 drivers/misc/mei/hw.h                    |   5 +
 drivers/misc/mei/init.c                  |  21 +-
 drivers/misc/mei/main.c                  |   2 +-
 drivers/misc/mei/mei_dev.h               |  26 ++
 drivers/misc/mei/mkhi.h                  |  57 ++++
 drivers/misc/mei/pci-me.c                |   2 +-
 include/linux/mei_aux.h                  |  21 ++
 33 files changed, 1146 insertions(+), 73 deletions(-)
 create mode 100644 drivers/gpu/drm/i915/gt/intel_gsc.c
 create mode 100644 drivers/gpu/drm/i915/gt/intel_gsc.h
 create mode 100644 drivers/misc/mei/gsc-me.c
 create mode 100644 drivers/misc/mei/mkhi.h
 create mode 100644 include/linux/mei_aux.h

-- 
2.32.0

[PATCH 01/20] drm/i915/gsc: add gsc as a mei auxiliary device

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

GSC is a graphics system controller, it provides
a chassis controller for graphics discrete cards.

There are two MEI interfaces in GSC: HECI1 and HECI2.

Both interfaces are on the BAR0 at offsets 0x00258000 and 0x00259000.
GSC is a GT Engine (class 4: instance 6). HECI1 interrupt is signaled
via bit 15 and HECI2 via bit 14 in the interrupt register.

This patch exports GSC as auxiliary device for mei driver to bind to
for HECI2 interface and prepares for HECI1 interface as
it will follow up soon.

CC: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 MAINTAINERS                              |   1 +
 drivers/gpu/drm/i915/Kconfig             |   1 +
 drivers/gpu/drm/i915/Makefile            |   3 +
 drivers/gpu/drm/i915/gt/intel_gsc.c      | 204 +++++++++++++++++++++++
 drivers/gpu/drm/i915/gt/intel_gsc.h      |  37 ++++
 drivers/gpu/drm/i915/gt/intel_gt.c       |   3 +
 drivers/gpu/drm/i915/gt/intel_gt.h       |   5 +
 drivers/gpu/drm/i915/gt/intel_gt_irq.c   |  13 ++
 drivers/gpu/drm/i915/gt/intel_gt_regs.h  |   1 +
 drivers/gpu/drm/i915/gt/intel_gt_types.h |   2 +
 drivers/gpu/drm/i915/i915_drv.h          |   8 +
 drivers/gpu/drm/i915/i915_pci.c          |   3 +-
 drivers/gpu/drm/i915/i915_reg.h          |   2 +
 drivers/gpu/drm/i915/intel_device_info.h |   2 +
 include/linux/mei_aux.h                  |  19 +++
 15 files changed, 303 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/i915/gt/intel_gsc.c
 create mode 100644 drivers/gpu/drm/i915/gt/intel_gsc.h
 create mode 100644 include/linux/mei_aux.h

diff --git a/MAINTAINERS b/MAINTAINERS
index d54b9f15ffce..42ca741074cc 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9995,6 +9995,7 @@ S:	Supported
 F:	Documentation/driver-api/mei/*
 F:	drivers/misc/mei/
 F:	drivers/watchdog/mei_wdt.c
+F:	include/linux/mei_aux.h
 F:	include/linux/mei_cl_bus.h
 F:	include/uapi/linux/mei.h
 F:	samples/mei/*
diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
index b8d45d259337..aa1e7f0b1fe4 100644
--- a/drivers/gpu/drm/i915/Kconfig
+++ b/drivers/gpu/drm/i915/Kconfig
@@ -30,6 +30,7 @@ config DRM_I915
 	select VMAP_PFN
 	select DRM_TTM
 	select DRM_BUDDY
+	select AUXILIARY_BUS
 	help
 	  Choose this option if you have a system that has "Intel Graphics
 	  Media Accelerator" or "HD Graphics" integrated graphics,
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 7e37455ba88d..cd0bf6806228 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -204,6 +204,9 @@ i915-y += gt/uc/intel_uc.o \
 	  gt/uc/intel_huc_debugfs.o \
 	  gt/uc/intel_huc_fw.o
 
+# graphics system controller (GSC) support
+i915-y += gt/intel_gsc.o
+
 # modesetting core code
 i915-y += \
 	display/hsw_ips.o \
diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
new file mode 100644
index 000000000000..21e860861f0b
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
@@ -0,0 +1,204 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright(c) 2019-2022, Intel Corporation. All rights reserved.
+ */
+
+#include <linux/irq.h>
+#include <linux/mei_aux.h>
+#include "i915_drv.h"
+#include "i915_reg.h"
+#include "gt/intel_gsc.h"
+#include "gt/intel_gt.h"
+
+#define GSC_BAR_LENGTH  0x00000FFC
+
+static void gsc_irq_mask(struct irq_data *d)
+{
+	/* generic irq handling */
+}
+
+static void gsc_irq_unmask(struct irq_data *d)
+{
+	/* generic irq handling */
+}
+
+static struct irq_chip gsc_irq_chip = {
+	.name = "gsc_irq_chip",
+	.irq_mask = gsc_irq_mask,
+	.irq_unmask = gsc_irq_unmask,
+};
+
+static int gsc_irq_init(int irq)
+{
+	irq_set_chip_and_handler_name(irq, &gsc_irq_chip,
+				      handle_simple_irq, "gsc_irq_handler");
+
+	return irq_set_chip_data(irq, NULL);
+}
+
+struct gsc_def {
+	const char *name;
+	unsigned long bar;
+	size_t bar_size;
+};
+
+/* gsc resources and definitions (HECI1 and HECI2) */
+static const struct gsc_def gsc_def_dg1[] = {
+	{
+		/* HECI1 not yet implemented. */
+	},
+	{
+		.name = "mei-gscfi",
+		.bar = DG1_GSC_HECI2_BASE,
+		.bar_size = GSC_BAR_LENGTH,
+	}
+};
+
+static void gsc_release_dev(struct device *dev)
+{
+	struct auxiliary_device *aux_dev = to_auxiliary_dev(dev);
+	struct mei_aux_device *adev = auxiliary_dev_to_mei_aux_dev(aux_dev);
+
+	kfree(adev);
+}
+
+static void gsc_destroy_one(struct intel_gsc_intf *intf)
+{
+	if (intf->adev) {
+		auxiliary_device_delete(&intf->adev->aux_dev);
+		auxiliary_device_uninit(&intf->adev->aux_dev);
+		intf->adev = NULL;
+	}
+	if (intf->irq >= 0)
+		irq_free_desc(intf->irq);
+	intf->irq = -1;
+}
+
+static void gsc_init_one(struct drm_i915_private *i915,
+			 struct intel_gsc_intf *intf,
+			 unsigned int intf_id)
+{
+	struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
+	struct mei_aux_device *adev;
+	struct auxiliary_device *aux_dev;
+	const struct gsc_def *def;
+	int ret;
+
+	intf->irq = -1;
+	intf->id = intf_id;
+
+	if (intf_id == 0 && !HAS_HECI_PXP(i915))
+		return;
+
+	def = &gsc_def_dg1[intf_id];
+
+	if (!def->name) {
+		drm_warn_once(&i915->drm, "HECI%d is not implemented!\n", intf_id + 1);
+		return;
+	}
+
+	intf->irq = irq_alloc_desc(0);
+	if (intf->irq < 0) {
+		drm_err(&i915->drm, "gsc irq error %d\n", intf->irq);
+		return;
+	}
+
+	ret = gsc_irq_init(intf->irq);
+	if (ret < 0) {
+		drm_err(&i915->drm, "gsc irq init failed %d\n", ret);
+		goto fail;
+	}
+
+	adev = kzalloc(sizeof(*adev), GFP_KERNEL);
+	if (!adev)
+		goto fail;
+
+	adev->irq = intf->irq;
+	adev->bar.parent = &pdev->resource[0];
+	adev->bar.start = def->bar + pdev->resource[0].start;
+	adev->bar.end = adev->bar.start + def->bar_size - 1;
+	adev->bar.flags = IORESOURCE_MEM;
+	adev->bar.desc = IORES_DESC_NONE;
+
+	aux_dev = &adev->aux_dev;
+	aux_dev->name = def->name;
+	aux_dev->id = (pci_domain_nr(pdev->bus) << 16) |
+		      PCI_DEVID(pdev->bus->number, pdev->devfn);
+	aux_dev->dev.parent = &pdev->dev;
+	aux_dev->dev.release = gsc_release_dev;
+
+	ret = auxiliary_device_init(aux_dev);
+	if (ret < 0) {
+		drm_err(&i915->drm, "gsc aux init failed %d\n", ret);
+		kfree(adev);
+		goto fail;
+	}
+
+	ret = auxiliary_device_add(aux_dev);
+	if (ret < 0) {
+		drm_err(&i915->drm, "gsc aux add failed %d\n", ret);
+		/* adev will be freed with the put_device() and .release sequence */
+		auxiliary_device_uninit(aux_dev);
+		goto fail;
+	}
+	intf->adev = adev;
+
+	return;
+fail:
+	gsc_destroy_one(intf);
+}
+
+static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
+{
+	int ret;
+
+	if (intf_id >= INTEL_GSC_NUM_INTERFACES) {
+		drm_warn_once(&gt->i915->drm, "GSC irq: intf_id %d is out of range", intf_id);
+		return;
+	}
+
+	if (!HAS_HECI_GSC(gt->i915)) {
+		drm_warn_once(&gt->i915->drm, "GSC irq: not supported");
+		return;
+	}
+
+	if (gt->gsc.intf[intf_id].irq < 0) {
+		drm_err_ratelimited(&gt->i915->drm, "GSC irq: irq not set");
+		return;
+	}
+
+	ret = generic_handle_irq(gt->gsc.intf[intf_id].irq);
+	if (ret)
+		drm_err_ratelimited(&gt->i915->drm, "error handling GSC irq: %d\n", ret);
+}
+
+void intel_gsc_irq_handler(struct intel_gt *gt, u32 iir)
+{
+	if (iir & GSC_IRQ_INTF(0))
+		gsc_irq_handler(gt, 0);
+	if (iir & GSC_IRQ_INTF(1))
+		gsc_irq_handler(gt, 1);
+}
+
+void intel_gsc_init(struct intel_gsc *gsc, struct drm_i915_private *i915)
+{
+	unsigned int i;
+
+	if (!HAS_HECI_GSC(i915))
+		return;
+
+	for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
+		gsc_init_one(i915, &gsc->intf[i], i);
+}
+
+void intel_gsc_fini(struct intel_gsc *gsc)
+{
+	struct intel_gt *gt = gsc_to_gt(gsc);
+	unsigned int i;
+
+	if (!HAS_HECI_GSC(gt->i915))
+		return;
+
+	for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
+		gsc_destroy_one(&gsc->intf[i]);
+}
diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.h b/drivers/gpu/drm/i915/gt/intel_gsc.h
new file mode 100644
index 000000000000..68582f912b21
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright(c) 2019-2022, Intel Corporation. All rights reserved.
+ */
+#ifndef __INTEL_GSC_DEV_H__
+#define __INTEL_GSC_DEV_H__
+
+#include <linux/types.h>
+
+struct drm_i915_private;
+struct intel_gt;
+struct mei_aux_device;
+
+#define INTEL_GSC_NUM_INTERFACES 2
+/*
+ * The HECI1 bit corresponds to bit15 and HECI2 to bit14.
+ * The reason for this is to allow growth for more interfaces in the future.
+ */
+#define GSC_IRQ_INTF(_x)  BIT(15 - (_x))
+
+/**
+ * struct intel_gsc - graphics security controller
+ * @intf : gsc interface
+ */
+struct intel_gsc {
+	struct intel_gsc_intf {
+		struct mei_aux_device *adev;
+		int irq;
+		unsigned int id;
+	} intf[INTEL_GSC_NUM_INTERFACES];
+};
+
+void intel_gsc_init(struct intel_gsc *gsc, struct drm_i915_private *dev_priv);
+void intel_gsc_fini(struct intel_gsc *gsc);
+void intel_gsc_irq_handler(struct intel_gt *gt, u32 iir);
+
+#endif /* __INTEL_GSC_DEV_H__ */
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index f0014c5072c9..92394f13b42f 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -456,6 +456,8 @@ void intel_gt_chipset_flush(struct intel_gt *gt)
 
 void intel_gt_driver_register(struct intel_gt *gt)
 {
+	intel_gsc_init(&gt->gsc, gt->i915);
+
 	intel_rps_driver_register(&gt->rps);
 
 	intel_gt_debugfs_register(gt);
@@ -784,6 +786,7 @@ void intel_gt_driver_unregister(struct intel_gt *gt)
 	intel_wakeref_t wakeref;
 
 	intel_rps_driver_unregister(&gt->rps);
+	intel_gsc_fini(&gt->gsc);
 
 	intel_pxp_fini(&gt->pxp);
 
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.h b/drivers/gpu/drm/i915/gt/intel_gt.h
index 0163bba0959e..44c6cb63ccbc 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt.h
@@ -46,6 +46,11 @@ static inline struct intel_gt *huc_to_gt(struct intel_huc *huc)
 	return container_of(huc, struct intel_gt, uc.huc);
 }
 
+static inline struct intel_gt *gsc_to_gt(struct intel_gsc *gsc)
+{
+	return container_of(gsc, struct intel_gt, gsc);
+}
+
 void intel_root_gt_init_early(struct drm_i915_private *i915);
 int intel_gt_assign_ggtt(struct intel_gt *gt);
 int intel_gt_init_mmio(struct intel_gt *gt);
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_irq.c b/drivers/gpu/drm/i915/gt/intel_gt_irq.c
index e443ac4c8059..88b4becfcb17 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_irq.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_irq.c
@@ -68,6 +68,9 @@ gen11_other_irq_handler(struct intel_gt *gt, const u8 instance,
 	if (instance == OTHER_KCR_INSTANCE)
 		return intel_pxp_irq_handler(&gt->pxp, iir);
 
+	if (instance == OTHER_GSC_INSTANCE)
+		return intel_gsc_irq_handler(gt, iir);
+
 	WARN_ONCE(1, "unhandled other interrupt instance=0x%x, iir=0x%x\n",
 		  instance, iir);
 }
@@ -184,6 +187,8 @@ void gen11_gt_irq_reset(struct intel_gt *gt)
 	intel_uncore_write(uncore, GEN11_VCS_VECS_INTR_ENABLE,	  0);
 	if (CCS_MASK(gt))
 		intel_uncore_write(uncore, GEN12_CCS_RSVD_INTR_ENABLE, 0);
+	if (HAS_HECI_GSC(gt->i915))
+		intel_uncore_write(uncore, GEN11_GUNIT_CSME_INTR_ENABLE, 0);
 
 	/* Restore masks irqs on RCS, BCS, VCS and VECS engines. */
 	intel_uncore_write(uncore, GEN11_RCS0_RSVD_INTR_MASK,	~0);
@@ -201,6 +206,8 @@ void gen11_gt_irq_reset(struct intel_gt *gt)
 		intel_uncore_write(uncore, GEN12_CCS0_CCS1_INTR_MASK, ~0);
 	if (HAS_ENGINE(gt, CCS2) || HAS_ENGINE(gt, CCS3))
 		intel_uncore_write(uncore, GEN12_CCS2_CCS3_INTR_MASK, ~0);
+	if (HAS_HECI_GSC(gt->i915))
+		intel_uncore_write(uncore, GEN11_GUNIT_CSME_INTR_MASK, ~0);
 
 	intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_ENABLE, 0);
 	intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_MASK,  ~0);
@@ -215,6 +222,7 @@ void gen11_gt_irq_postinstall(struct intel_gt *gt)
 {
 	struct intel_uncore *uncore = gt->uncore;
 	u32 irqs = GT_RENDER_USER_INTERRUPT;
+	const u32 gsc_mask = GSC_IRQ_INTF(0) | GSC_IRQ_INTF(1);
 	u32 dmask;
 	u32 smask;
 
@@ -233,6 +241,9 @@ void gen11_gt_irq_postinstall(struct intel_gt *gt)
 	intel_uncore_write(uncore, GEN11_VCS_VECS_INTR_ENABLE, dmask);
 	if (CCS_MASK(gt))
 		intel_uncore_write(uncore, GEN12_CCS_RSVD_INTR_ENABLE, smask);
+	if (HAS_HECI_GSC(gt->i915))
+		intel_uncore_write(uncore, GEN11_GUNIT_CSME_INTR_ENABLE,
+				   gsc_mask);
 
 	/* Unmask irqs on RCS, BCS, VCS and VECS engines. */
 	intel_uncore_write(uncore, GEN11_RCS0_RSVD_INTR_MASK, ~smask);
@@ -250,6 +261,8 @@ void gen11_gt_irq_postinstall(struct intel_gt *gt)
 		intel_uncore_write(uncore, GEN12_CCS0_CCS1_INTR_MASK, ~dmask);
 	if (HAS_ENGINE(gt, CCS2) || HAS_ENGINE(gt, CCS3))
 		intel_uncore_write(uncore, GEN12_CCS2_CCS3_INTR_MASK, ~dmask);
+	if (HAS_HECI_GSC(gt->i915))
+		intel_uncore_write(uncore, GEN11_GUNIT_CSME_INTR_MASK, ~gsc_mask);
 
 	/*
 	 * RPS interrupts will get enabled/disabled on demand when RPS itself
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
index 0a5c2648aaf0..5d8c8b4e2f7b 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
@@ -1484,6 +1484,7 @@
 #define   OTHER_GUC_INSTANCE			0
 #define   OTHER_GTPM_INSTANCE			1
 #define   OTHER_KCR_INSTANCE			4
+#define   OTHER_GSC_INSTANCE			6
 
 #define GEN11_IIR_REG_SELECTOR(x)		_MMIO(0x190070 + ((x) * 4))
 
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h b/drivers/gpu/drm/i915/gt/intel_gt_types.h
index 937b2e1a305e..b06611c1d4ad 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h
@@ -16,6 +16,7 @@
 #include <linux/workqueue.h>
 
 #include "uc/intel_uc.h"
+#include "intel_gsc.h"
 
 #include "i915_vma.h"
 #include "intel_engine_types.h"
@@ -73,6 +74,7 @@ struct intel_gt {
 	struct i915_ggtt *ggtt;
 
 	struct intel_uc uc;
+	struct intel_gsc gsc;
 
 	struct mutex tlb_invalidate_lock;
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 06e7c2802c5e..907eda7edf1b 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1307,6 +1307,14 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
 
 #define HAS_DMC(dev_priv)	(INTEL_INFO(dev_priv)->display.has_dmc)
 
+#define HAS_HECI_PXP(dev_priv) \
+	(INTEL_INFO(dev_priv)->has_heci_pxp)
+
+#define HAS_HECI_GSCFI(dev_priv) \
+	(INTEL_INFO(dev_priv)->has_heci_gscfi)
+
+#define HAS_HECI_GSC(dev_priv) (HAS_HECI_PXP(dev_priv) || HAS_HECI_GSCFI(dev_priv))
+
 #define HAS_MSO(i915)		(DISPLAY_VER(i915) >= 12)
 
 #define HAS_RUNTIME_PM(dev_priv) (INTEL_INFO(dev_priv)->has_runtime_pm)
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 736e04078f56..06e6dad0d7f7 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -901,7 +901,8 @@ static const struct intel_device_info rkl_info = {
 	.has_llc = 0, \
 	.has_pxp = 0, \
 	.has_snoop = 1, \
-	.is_dgfx = 1
+	.is_dgfx = 1, \
+	.has_heci_gscfi = 1
 
 static const struct intel_device_info dg1_info = {
 	GEN12_FEATURES,
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index fef71b242706..1dd7b7de6002 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -976,6 +976,8 @@
 #define GEN12_COMPUTE2_RING_BASE	0x1e000
 #define GEN12_COMPUTE3_RING_BASE	0x26000
 #define BLT_RING_BASE		0x22000
+#define DG1_GSC_HECI1_BASE	0x00258000
+#define DG1_GSC_HECI2_BASE	0x00259000
 
 
 
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
index f9b955810593..576d15a04c9e 100644
--- a/drivers/gpu/drm/i915/intel_device_info.h
+++ b/drivers/gpu/drm/i915/intel_device_info.h
@@ -141,6 +141,8 @@ enum intel_ppgtt_type {
 	func(has_flat_ccs); \
 	func(has_global_mocs); \
 	func(has_gt_uc); \
+	func(has_heci_pxp); \
+	func(has_heci_gscfi); \
 	func(has_guc_deprivilege); \
 	func(has_l3_dpf); \
 	func(has_llc); \
diff --git a/include/linux/mei_aux.h b/include/linux/mei_aux.h
new file mode 100644
index 000000000000..587f25128848
--- /dev/null
+++ b/include/linux/mei_aux.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2022, Intel Corporation. All rights reserved.
+ */
+#ifndef _LINUX_MEI_AUX_H
+#define _LINUX_MEI_AUX_H
+
+#include <linux/auxiliary_bus.h>
+
+struct mei_aux_device {
+	struct auxiliary_device aux_dev;
+	int irq;
+	struct resource bar;
+};
+
+#define auxiliary_dev_to_mei_aux_dev(auxiliary_dev) \
+	container_of(auxiliary_dev, struct mei_aux_device, aux_dev)
+
+#endif /* _LINUX_MEI_AUX_H */
-- 
2.32.0

[Intel-gfx] [PATCH 01/20] drm/i915/gsc: add gsc as a mei auxiliary device

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

GSC is a graphics system controller, it provides
a chassis controller for graphics discrete cards.

There are two MEI interfaces in GSC: HECI1 and HECI2.

Both interfaces are on the BAR0 at offsets 0x00258000 and 0x00259000.
GSC is a GT Engine (class 4: instance 6). HECI1 interrupt is signaled
via bit 15 and HECI2 via bit 14 in the interrupt register.

This patch exports GSC as auxiliary device for mei driver to bind to
for HECI2 interface and prepares for HECI1 interface as
it will follow up soon.

CC: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Acked-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 MAINTAINERS                              |   1 +
 drivers/gpu/drm/i915/Kconfig             |   1 +
 drivers/gpu/drm/i915/Makefile            |   3 +
 drivers/gpu/drm/i915/gt/intel_gsc.c      | 204 +++++++++++++++++++++++
 drivers/gpu/drm/i915/gt/intel_gsc.h      |  37 ++++
 drivers/gpu/drm/i915/gt/intel_gt.c       |   3 +
 drivers/gpu/drm/i915/gt/intel_gt.h       |   5 +
 drivers/gpu/drm/i915/gt/intel_gt_irq.c   |  13 ++
 drivers/gpu/drm/i915/gt/intel_gt_regs.h  |   1 +
 drivers/gpu/drm/i915/gt/intel_gt_types.h |   2 +
 drivers/gpu/drm/i915/i915_drv.h          |   8 +
 drivers/gpu/drm/i915/i915_pci.c          |   3 +-
 drivers/gpu/drm/i915/i915_reg.h          |   2 +
 drivers/gpu/drm/i915/intel_device_info.h |   2 +
 include/linux/mei_aux.h                  |  19 +++
 15 files changed, 303 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/i915/gt/intel_gsc.c
 create mode 100644 drivers/gpu/drm/i915/gt/intel_gsc.h
 create mode 100644 include/linux/mei_aux.h

diff --git a/MAINTAINERS b/MAINTAINERS
index d54b9f15ffce..42ca741074cc 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9995,6 +9995,7 @@ S:	Supported
 F:	Documentation/driver-api/mei/*
 F:	drivers/misc/mei/
 F:	drivers/watchdog/mei_wdt.c
+F:	include/linux/mei_aux.h
 F:	include/linux/mei_cl_bus.h
 F:	include/uapi/linux/mei.h
 F:	samples/mei/*
diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig
index b8d45d259337..aa1e7f0b1fe4 100644
--- a/drivers/gpu/drm/i915/Kconfig
+++ b/drivers/gpu/drm/i915/Kconfig
@@ -30,6 +30,7 @@ config DRM_I915
 	select VMAP_PFN
 	select DRM_TTM
 	select DRM_BUDDY
+	select AUXILIARY_BUS
 	help
 	  Choose this option if you have a system that has "Intel Graphics
 	  Media Accelerator" or "HD Graphics" integrated graphics,
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 7e37455ba88d..cd0bf6806228 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -204,6 +204,9 @@ i915-y += gt/uc/intel_uc.o \
 	  gt/uc/intel_huc_debugfs.o \
 	  gt/uc/intel_huc_fw.o
 
+# graphics system controller (GSC) support
+i915-y += gt/intel_gsc.o
+
 # modesetting core code
 i915-y += \
 	display/hsw_ips.o \
diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
new file mode 100644
index 000000000000..21e860861f0b
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
@@ -0,0 +1,204 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright(c) 2019-2022, Intel Corporation. All rights reserved.
+ */
+
+#include <linux/irq.h>
+#include <linux/mei_aux.h>
+#include "i915_drv.h"
+#include "i915_reg.h"
+#include "gt/intel_gsc.h"
+#include "gt/intel_gt.h"
+
+#define GSC_BAR_LENGTH  0x00000FFC
+
+static void gsc_irq_mask(struct irq_data *d)
+{
+	/* generic irq handling */
+}
+
+static void gsc_irq_unmask(struct irq_data *d)
+{
+	/* generic irq handling */
+}
+
+static struct irq_chip gsc_irq_chip = {
+	.name = "gsc_irq_chip",
+	.irq_mask = gsc_irq_mask,
+	.irq_unmask = gsc_irq_unmask,
+};
+
+static int gsc_irq_init(int irq)
+{
+	irq_set_chip_and_handler_name(irq, &gsc_irq_chip,
+				      handle_simple_irq, "gsc_irq_handler");
+
+	return irq_set_chip_data(irq, NULL);
+}
+
+struct gsc_def {
+	const char *name;
+	unsigned long bar;
+	size_t bar_size;
+};
+
+/* gsc resources and definitions (HECI1 and HECI2) */
+static const struct gsc_def gsc_def_dg1[] = {
+	{
+		/* HECI1 not yet implemented. */
+	},
+	{
+		.name = "mei-gscfi",
+		.bar = DG1_GSC_HECI2_BASE,
+		.bar_size = GSC_BAR_LENGTH,
+	}
+};
+
+static void gsc_release_dev(struct device *dev)
+{
+	struct auxiliary_device *aux_dev = to_auxiliary_dev(dev);
+	struct mei_aux_device *adev = auxiliary_dev_to_mei_aux_dev(aux_dev);
+
+	kfree(adev);
+}
+
+static void gsc_destroy_one(struct intel_gsc_intf *intf)
+{
+	if (intf->adev) {
+		auxiliary_device_delete(&intf->adev->aux_dev);
+		auxiliary_device_uninit(&intf->adev->aux_dev);
+		intf->adev = NULL;
+	}
+	if (intf->irq >= 0)
+		irq_free_desc(intf->irq);
+	intf->irq = -1;
+}
+
+static void gsc_init_one(struct drm_i915_private *i915,
+			 struct intel_gsc_intf *intf,
+			 unsigned int intf_id)
+{
+	struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
+	struct mei_aux_device *adev;
+	struct auxiliary_device *aux_dev;
+	const struct gsc_def *def;
+	int ret;
+
+	intf->irq = -1;
+	intf->id = intf_id;
+
+	if (intf_id == 0 && !HAS_HECI_PXP(i915))
+		return;
+
+	def = &gsc_def_dg1[intf_id];
+
+	if (!def->name) {
+		drm_warn_once(&i915->drm, "HECI%d is not implemented!\n", intf_id + 1);
+		return;
+	}
+
+	intf->irq = irq_alloc_desc(0);
+	if (intf->irq < 0) {
+		drm_err(&i915->drm, "gsc irq error %d\n", intf->irq);
+		return;
+	}
+
+	ret = gsc_irq_init(intf->irq);
+	if (ret < 0) {
+		drm_err(&i915->drm, "gsc irq init failed %d\n", ret);
+		goto fail;
+	}
+
+	adev = kzalloc(sizeof(*adev), GFP_KERNEL);
+	if (!adev)
+		goto fail;
+
+	adev->irq = intf->irq;
+	adev->bar.parent = &pdev->resource[0];
+	adev->bar.start = def->bar + pdev->resource[0].start;
+	adev->bar.end = adev->bar.start + def->bar_size - 1;
+	adev->bar.flags = IORESOURCE_MEM;
+	adev->bar.desc = IORES_DESC_NONE;
+
+	aux_dev = &adev->aux_dev;
+	aux_dev->name = def->name;
+	aux_dev->id = (pci_domain_nr(pdev->bus) << 16) |
+		      PCI_DEVID(pdev->bus->number, pdev->devfn);
+	aux_dev->dev.parent = &pdev->dev;
+	aux_dev->dev.release = gsc_release_dev;
+
+	ret = auxiliary_device_init(aux_dev);
+	if (ret < 0) {
+		drm_err(&i915->drm, "gsc aux init failed %d\n", ret);
+		kfree(adev);
+		goto fail;
+	}
+
+	ret = auxiliary_device_add(aux_dev);
+	if (ret < 0) {
+		drm_err(&i915->drm, "gsc aux add failed %d\n", ret);
+		/* adev will be freed with the put_device() and .release sequence */
+		auxiliary_device_uninit(aux_dev);
+		goto fail;
+	}
+	intf->adev = adev;
+
+	return;
+fail:
+	gsc_destroy_one(intf);
+}
+
+static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
+{
+	int ret;
+
+	if (intf_id >= INTEL_GSC_NUM_INTERFACES) {
+		drm_warn_once(&gt->i915->drm, "GSC irq: intf_id %d is out of range", intf_id);
+		return;
+	}
+
+	if (!HAS_HECI_GSC(gt->i915)) {
+		drm_warn_once(&gt->i915->drm, "GSC irq: not supported");
+		return;
+	}
+
+	if (gt->gsc.intf[intf_id].irq < 0) {
+		drm_err_ratelimited(&gt->i915->drm, "GSC irq: irq not set");
+		return;
+	}
+
+	ret = generic_handle_irq(gt->gsc.intf[intf_id].irq);
+	if (ret)
+		drm_err_ratelimited(&gt->i915->drm, "error handling GSC irq: %d\n", ret);
+}
+
+void intel_gsc_irq_handler(struct intel_gt *gt, u32 iir)
+{
+	if (iir & GSC_IRQ_INTF(0))
+		gsc_irq_handler(gt, 0);
+	if (iir & GSC_IRQ_INTF(1))
+		gsc_irq_handler(gt, 1);
+}
+
+void intel_gsc_init(struct intel_gsc *gsc, struct drm_i915_private *i915)
+{
+	unsigned int i;
+
+	if (!HAS_HECI_GSC(i915))
+		return;
+
+	for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
+		gsc_init_one(i915, &gsc->intf[i], i);
+}
+
+void intel_gsc_fini(struct intel_gsc *gsc)
+{
+	struct intel_gt *gt = gsc_to_gt(gsc);
+	unsigned int i;
+
+	if (!HAS_HECI_GSC(gt->i915))
+		return;
+
+	for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
+		gsc_destroy_one(&gsc->intf[i]);
+}
diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.h b/drivers/gpu/drm/i915/gt/intel_gsc.h
new file mode 100644
index 000000000000..68582f912b21
--- /dev/null
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright(c) 2019-2022, Intel Corporation. All rights reserved.
+ */
+#ifndef __INTEL_GSC_DEV_H__
+#define __INTEL_GSC_DEV_H__
+
+#include <linux/types.h>
+
+struct drm_i915_private;
+struct intel_gt;
+struct mei_aux_device;
+
+#define INTEL_GSC_NUM_INTERFACES 2
+/*
+ * The HECI1 bit corresponds to bit15 and HECI2 to bit14.
+ * The reason for this is to allow growth for more interfaces in the future.
+ */
+#define GSC_IRQ_INTF(_x)  BIT(15 - (_x))
+
+/**
+ * struct intel_gsc - graphics security controller
+ * @intf : gsc interface
+ */
+struct intel_gsc {
+	struct intel_gsc_intf {
+		struct mei_aux_device *adev;
+		int irq;
+		unsigned int id;
+	} intf[INTEL_GSC_NUM_INTERFACES];
+};
+
+void intel_gsc_init(struct intel_gsc *gsc, struct drm_i915_private *dev_priv);
+void intel_gsc_fini(struct intel_gsc *gsc);
+void intel_gsc_irq_handler(struct intel_gt *gt, u32 iir);
+
+#endif /* __INTEL_GSC_DEV_H__ */
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c
index f0014c5072c9..92394f13b42f 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt.c
@@ -456,6 +456,8 @@ void intel_gt_chipset_flush(struct intel_gt *gt)
 
 void intel_gt_driver_register(struct intel_gt *gt)
 {
+	intel_gsc_init(&gt->gsc, gt->i915);
+
 	intel_rps_driver_register(&gt->rps);
 
 	intel_gt_debugfs_register(gt);
@@ -784,6 +786,7 @@ void intel_gt_driver_unregister(struct intel_gt *gt)
 	intel_wakeref_t wakeref;
 
 	intel_rps_driver_unregister(&gt->rps);
+	intel_gsc_fini(&gt->gsc);
 
 	intel_pxp_fini(&gt->pxp);
 
diff --git a/drivers/gpu/drm/i915/gt/intel_gt.h b/drivers/gpu/drm/i915/gt/intel_gt.h
index 0163bba0959e..44c6cb63ccbc 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt.h
@@ -46,6 +46,11 @@ static inline struct intel_gt *huc_to_gt(struct intel_huc *huc)
 	return container_of(huc, struct intel_gt, uc.huc);
 }
 
+static inline struct intel_gt *gsc_to_gt(struct intel_gsc *gsc)
+{
+	return container_of(gsc, struct intel_gt, gsc);
+}
+
 void intel_root_gt_init_early(struct drm_i915_private *i915);
 int intel_gt_assign_ggtt(struct intel_gt *gt);
 int intel_gt_init_mmio(struct intel_gt *gt);
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_irq.c b/drivers/gpu/drm/i915/gt/intel_gt_irq.c
index e443ac4c8059..88b4becfcb17 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_irq.c
+++ b/drivers/gpu/drm/i915/gt/intel_gt_irq.c
@@ -68,6 +68,9 @@ gen11_other_irq_handler(struct intel_gt *gt, const u8 instance,
 	if (instance == OTHER_KCR_INSTANCE)
 		return intel_pxp_irq_handler(&gt->pxp, iir);
 
+	if (instance == OTHER_GSC_INSTANCE)
+		return intel_gsc_irq_handler(gt, iir);
+
 	WARN_ONCE(1, "unhandled other interrupt instance=0x%x, iir=0x%x\n",
 		  instance, iir);
 }
@@ -184,6 +187,8 @@ void gen11_gt_irq_reset(struct intel_gt *gt)
 	intel_uncore_write(uncore, GEN11_VCS_VECS_INTR_ENABLE,	  0);
 	if (CCS_MASK(gt))
 		intel_uncore_write(uncore, GEN12_CCS_RSVD_INTR_ENABLE, 0);
+	if (HAS_HECI_GSC(gt->i915))
+		intel_uncore_write(uncore, GEN11_GUNIT_CSME_INTR_ENABLE, 0);
 
 	/* Restore masks irqs on RCS, BCS, VCS and VECS engines. */
 	intel_uncore_write(uncore, GEN11_RCS0_RSVD_INTR_MASK,	~0);
@@ -201,6 +206,8 @@ void gen11_gt_irq_reset(struct intel_gt *gt)
 		intel_uncore_write(uncore, GEN12_CCS0_CCS1_INTR_MASK, ~0);
 	if (HAS_ENGINE(gt, CCS2) || HAS_ENGINE(gt, CCS3))
 		intel_uncore_write(uncore, GEN12_CCS2_CCS3_INTR_MASK, ~0);
+	if (HAS_HECI_GSC(gt->i915))
+		intel_uncore_write(uncore, GEN11_GUNIT_CSME_INTR_MASK, ~0);
 
 	intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_ENABLE, 0);
 	intel_uncore_write(uncore, GEN11_GPM_WGBOXPERF_INTR_MASK,  ~0);
@@ -215,6 +222,7 @@ void gen11_gt_irq_postinstall(struct intel_gt *gt)
 {
 	struct intel_uncore *uncore = gt->uncore;
 	u32 irqs = GT_RENDER_USER_INTERRUPT;
+	const u32 gsc_mask = GSC_IRQ_INTF(0) | GSC_IRQ_INTF(1);
 	u32 dmask;
 	u32 smask;
 
@@ -233,6 +241,9 @@ void gen11_gt_irq_postinstall(struct intel_gt *gt)
 	intel_uncore_write(uncore, GEN11_VCS_VECS_INTR_ENABLE, dmask);
 	if (CCS_MASK(gt))
 		intel_uncore_write(uncore, GEN12_CCS_RSVD_INTR_ENABLE, smask);
+	if (HAS_HECI_GSC(gt->i915))
+		intel_uncore_write(uncore, GEN11_GUNIT_CSME_INTR_ENABLE,
+				   gsc_mask);
 
 	/* Unmask irqs on RCS, BCS, VCS and VECS engines. */
 	intel_uncore_write(uncore, GEN11_RCS0_RSVD_INTR_MASK, ~smask);
@@ -250,6 +261,8 @@ void gen11_gt_irq_postinstall(struct intel_gt *gt)
 		intel_uncore_write(uncore, GEN12_CCS0_CCS1_INTR_MASK, ~dmask);
 	if (HAS_ENGINE(gt, CCS2) || HAS_ENGINE(gt, CCS3))
 		intel_uncore_write(uncore, GEN12_CCS2_CCS3_INTR_MASK, ~dmask);
+	if (HAS_HECI_GSC(gt->i915))
+		intel_uncore_write(uncore, GEN11_GUNIT_CSME_INTR_MASK, ~gsc_mask);
 
 	/*
 	 * RPS interrupts will get enabled/disabled on demand when RPS itself
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
index 0a5c2648aaf0..5d8c8b4e2f7b 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
@@ -1484,6 +1484,7 @@
 #define   OTHER_GUC_INSTANCE			0
 #define   OTHER_GTPM_INSTANCE			1
 #define   OTHER_KCR_INSTANCE			4
+#define   OTHER_GSC_INSTANCE			6
 
 #define GEN11_IIR_REG_SELECTOR(x)		_MMIO(0x190070 + ((x) * 4))
 
diff --git a/drivers/gpu/drm/i915/gt/intel_gt_types.h b/drivers/gpu/drm/i915/gt/intel_gt_types.h
index 937b2e1a305e..b06611c1d4ad 100644
--- a/drivers/gpu/drm/i915/gt/intel_gt_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_gt_types.h
@@ -16,6 +16,7 @@
 #include <linux/workqueue.h>
 
 #include "uc/intel_uc.h"
+#include "intel_gsc.h"
 
 #include "i915_vma.h"
 #include "intel_engine_types.h"
@@ -73,6 +74,7 @@ struct intel_gt {
 	struct i915_ggtt *ggtt;
 
 	struct intel_uc uc;
+	struct intel_gsc gsc;
 
 	struct mutex tlb_invalidate_lock;
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 06e7c2802c5e..907eda7edf1b 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1307,6 +1307,14 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
 
 #define HAS_DMC(dev_priv)	(INTEL_INFO(dev_priv)->display.has_dmc)
 
+#define HAS_HECI_PXP(dev_priv) \
+	(INTEL_INFO(dev_priv)->has_heci_pxp)
+
+#define HAS_HECI_GSCFI(dev_priv) \
+	(INTEL_INFO(dev_priv)->has_heci_gscfi)
+
+#define HAS_HECI_GSC(dev_priv) (HAS_HECI_PXP(dev_priv) || HAS_HECI_GSCFI(dev_priv))
+
 #define HAS_MSO(i915)		(DISPLAY_VER(i915) >= 12)
 
 #define HAS_RUNTIME_PM(dev_priv) (INTEL_INFO(dev_priv)->has_runtime_pm)
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 736e04078f56..06e6dad0d7f7 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -901,7 +901,8 @@ static const struct intel_device_info rkl_info = {
 	.has_llc = 0, \
 	.has_pxp = 0, \
 	.has_snoop = 1, \
-	.is_dgfx = 1
+	.is_dgfx = 1, \
+	.has_heci_gscfi = 1
 
 static const struct intel_device_info dg1_info = {
 	GEN12_FEATURES,
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index fef71b242706..1dd7b7de6002 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -976,6 +976,8 @@
 #define GEN12_COMPUTE2_RING_BASE	0x1e000
 #define GEN12_COMPUTE3_RING_BASE	0x26000
 #define BLT_RING_BASE		0x22000
+#define DG1_GSC_HECI1_BASE	0x00258000
+#define DG1_GSC_HECI2_BASE	0x00259000
 
 
 
diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
index f9b955810593..576d15a04c9e 100644
--- a/drivers/gpu/drm/i915/intel_device_info.h
+++ b/drivers/gpu/drm/i915/intel_device_info.h
@@ -141,6 +141,8 @@ enum intel_ppgtt_type {
 	func(has_flat_ccs); \
 	func(has_global_mocs); \
 	func(has_gt_uc); \
+	func(has_heci_pxp); \
+	func(has_heci_gscfi); \
 	func(has_guc_deprivilege); \
 	func(has_l3_dpf); \
 	func(has_llc); \
diff --git a/include/linux/mei_aux.h b/include/linux/mei_aux.h
new file mode 100644
index 000000000000..587f25128848
--- /dev/null
+++ b/include/linux/mei_aux.h
@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2022, Intel Corporation. All rights reserved.
+ */
+#ifndef _LINUX_MEI_AUX_H
+#define _LINUX_MEI_AUX_H
+
+#include <linux/auxiliary_bus.h>
+
+struct mei_aux_device {
+	struct auxiliary_device aux_dev;
+	int irq;
+	struct resource bar;
+};
+
+#define auxiliary_dev_to_mei_aux_dev(auxiliary_dev) \
+	container_of(auxiliary_dev, struct mei_aux_device, aux_dev)
+
+#endif /* _LINUX_MEI_AUX_H */
-- 
2.32.0

[PATCH 02/20] mei: add support for graphics system controller (gsc) devices

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

GSC is a graphics system controller, based on CSE, it provides
a chassis controller for graphics discrete cards, as well as it
supports media protection on selected devices.

mei_gsc binds to a auxiliary devices exposed by Intel discrete
driver i915.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/misc/mei/Kconfig  |  14 +++
 drivers/misc/mei/Makefile |   3 +
 drivers/misc/mei/gsc-me.c | 194 ++++++++++++++++++++++++++++++++++++++
 drivers/misc/mei/hw-me.c  |  27 +++++-
 drivers/misc/mei/hw-me.h  |   2 +
 5 files changed, 238 insertions(+), 2 deletions(-)
 create mode 100644 drivers/misc/mei/gsc-me.c

diff --git a/drivers/misc/mei/Kconfig b/drivers/misc/mei/Kconfig
index 0e0bcd0da852..d21486d69df2 100644
--- a/drivers/misc/mei/Kconfig
+++ b/drivers/misc/mei/Kconfig
@@ -46,6 +46,20 @@ config INTEL_MEI_TXE
 	  Supported SoCs:
 	  Intel Bay Trail
 
+config INTEL_MEI_GSC
+	tristate "Intel MEI GSC embedded device"
+	depends on INTEL_MEI
+	depends on INTEL_MEI_ME
+	depends on X86 && PCI
+	depends on DRM_I915
+	help
+	  Intel auxiliary driver for GSC devices embedded in Intel graphics devices.
+
+	  An MEI device here called GSC can be embedded in an
+	  Intel graphics devices, to support a range of chassis
+	  tasks such as graphics card firmware update and security
+	  tasks.
+
 source "drivers/misc/mei/hdcp/Kconfig"
 source "drivers/misc/mei/pxp/Kconfig"
 
diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile
index d8e5165917f2..fb740d754900 100644
--- a/drivers/misc/mei/Makefile
+++ b/drivers/misc/mei/Makefile
@@ -18,6 +18,9 @@ obj-$(CONFIG_INTEL_MEI_ME) += mei-me.o
 mei-me-objs := pci-me.o
 mei-me-objs += hw-me.o
 
+obj-$(CONFIG_INTEL_MEI_GSC) += mei-gsc.o
+mei-gsc-objs := gsc-me.o
+
 obj-$(CONFIG_INTEL_MEI_TXE) += mei-txe.o
 mei-txe-objs := pci-txe.o
 mei-txe-objs += hw-txe.o
diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
new file mode 100644
index 000000000000..64b02adf3149
--- /dev/null
+++ b/drivers/misc/mei/gsc-me.c
@@ -0,0 +1,194 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright(c) 2019-2022, Intel Corporation. All rights reserved.
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ */
+
+#include <linux/module.h>
+#include <linux/mei_aux.h>
+#include <linux/device.h>
+#include <linux/irqreturn.h>
+#include <linux/jiffies.h>
+#include <linux/ktime.h>
+#include <linux/delay.h>
+#include <linux/pm_runtime.h>
+
+#include "mei_dev.h"
+#include "hw-me.h"
+#include "hw-me-regs.h"
+
+#include "mei-trace.h"
+
+#define MEI_GSC_RPM_TIMEOUT 500
+
+static int mei_gsc_read_hfs(const struct mei_device *dev, int where, u32 *val)
+{
+	struct mei_me_hw *hw = to_me_hw(dev);
+
+	*val = ioread32(hw->mem_addr + where + 0xC00);
+
+	return 0;
+}
+
+static int mei_gsc_probe(struct auxiliary_device *aux_dev,
+			 const struct auxiliary_device_id *aux_dev_id)
+{
+	struct mei_aux_device *adev = auxiliary_dev_to_mei_aux_dev(aux_dev);
+	struct mei_device *dev;
+	struct mei_me_hw *hw;
+	struct device *device;
+	const struct mei_cfg *cfg;
+	int ret;
+
+	cfg = mei_me_get_cfg(aux_dev_id->driver_data);
+	if (!cfg)
+		return -ENODEV;
+
+	device = &aux_dev->dev;
+
+	dev = mei_me_dev_init(device, cfg);
+	if (IS_ERR(dev)) {
+		ret = PTR_ERR(dev);
+		goto err;
+	}
+
+	hw = to_me_hw(dev);
+	hw->mem_addr = devm_ioremap_resource(device, &adev->bar);
+	if (IS_ERR(hw->mem_addr)) {
+		dev_err(device, "mmio not mapped\n");
+		ret = PTR_ERR(hw->mem_addr);
+		goto err;
+	}
+
+	hw->irq = adev->irq;
+	hw->read_fws = mei_gsc_read_hfs;
+
+	dev_set_drvdata(device, dev);
+
+	ret = devm_request_threaded_irq(device, hw->irq,
+					mei_me_irq_quick_handler,
+					mei_me_irq_thread_handler,
+					IRQF_ONESHOT, KBUILD_MODNAME, dev);
+	if (ret) {
+		dev_err(device, "irq register failed %d\n", ret);
+		goto err;
+	}
+
+	pm_runtime_get_noresume(device);
+	pm_runtime_set_active(device);
+	pm_runtime_enable(device);
+
+	if (mei_start(dev)) {
+		dev_err(device, "init hw failure.\n");
+		ret = -ENODEV;
+		goto irq_err;
+	}
+
+	pm_runtime_set_autosuspend_delay(device, MEI_GSC_RPM_TIMEOUT);
+	pm_runtime_use_autosuspend(device);
+
+	ret = mei_register(dev, device);
+	if (ret)
+		goto register_err;
+
+	pm_runtime_put_noidle(device);
+	return 0;
+
+register_err:
+	mei_stop(dev);
+irq_err:
+	devm_free_irq(device, hw->irq, dev);
+
+err:
+	dev_err(device, "probe failed: %d\n", ret);
+	dev_set_drvdata(device, NULL);
+	return ret;
+}
+
+static void mei_gsc_remove(struct auxiliary_device *aux_dev)
+{
+	struct mei_device *dev;
+	struct mei_me_hw *hw;
+
+	dev = dev_get_drvdata(&aux_dev->dev);
+	if (!dev)
+		return;
+
+	hw = to_me_hw(dev);
+
+	mei_stop(dev);
+
+	mei_deregister(dev);
+
+	pm_runtime_disable(&aux_dev->dev);
+
+	mei_disable_interrupts(dev);
+	devm_free_irq(&aux_dev->dev, hw->irq, dev);
+}
+
+static int __maybe_unused mei_gsc_pm_suspend(struct device *device)
+{
+	struct mei_device *dev = dev_get_drvdata(device);
+
+	if (!dev)
+		return -ENODEV;
+
+	mei_stop(dev);
+
+	mei_disable_interrupts(dev);
+
+	return 0;
+}
+
+static int __maybe_unused mei_gsc_pm_resume(struct device *device)
+{
+	struct mei_device *dev = dev_get_drvdata(device);
+	int err;
+
+	if (!dev)
+		return -ENODEV;
+
+	err = mei_restart(dev);
+	if (err)
+		return err;
+
+	/* Start timer if stopped in suspend */
+	schedule_delayed_work(&dev->timer_work, HZ);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(mei_gsc_pm_ops, mei_gsc_pm_suspend, mei_gsc_pm_resume);
+
+static const struct auxiliary_device_id mei_gsc_id_table[] = {
+	{
+		.name = "i915.mei-gsc",
+		.driver_data = MEI_ME_GSC_CFG,
+
+	},
+	{
+		.name = "i915.mei-gscfi",
+		.driver_data = MEI_ME_GSCFI_CFG,
+	},
+	{
+		/* sentinel */
+	}
+};
+MODULE_DEVICE_TABLE(auxiliary, mei_gsc_id_table);
+
+static struct auxiliary_driver mei_gsc_driver = {
+	.probe	= mei_gsc_probe,
+	.remove = mei_gsc_remove,
+	.driver = {
+		/* auxiliary_driver_register() sets .name to be the modname */
+		.pm = &mei_gsc_pm_ops,
+	},
+	.id_table = mei_gsc_id_table
+};
+module_auxiliary_driver(mei_gsc_driver);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_ALIAS("auxiliary:i915.mei-gsc");
+MODULE_ALIAS("auxiliary:i915.mei-gscfi");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 719fee9af156..03945d3b34da 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -1226,6 +1226,7 @@ irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id)
 	me_intr_disable(dev, hcsr);
 	return IRQ_WAKE_THREAD;
 }
+EXPORT_SYMBOL_GPL(mei_me_irq_quick_handler);
 
 /**
  * mei_me_irq_thread_handler - function called after ISR to handle the interrupt
@@ -1326,6 +1327,7 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
 	mutex_unlock(&dev->device_lock);
 	return IRQ_HANDLED;
 }
+EXPORT_SYMBOL_GPL(mei_me_irq_thread_handler);
 
 static const struct mei_hw_ops mei_me_hw_ops = {
 
@@ -1440,6 +1442,12 @@ static bool mei_me_fw_type_sps_ign(const struct pci_dev *pdev)
 #define MEI_CFG_KIND_ITOUCH                     \
 	.kind = "itouch"
 
+#define MEI_CFG_TYPE_GSC                        \
+	.kind = "gsc"
+
+#define MEI_CFG_TYPE_GSCFI                      \
+	.kind = "gscfi"
+
 #define MEI_CFG_FW_SPS_IGN                      \
 	.quirk_probe = mei_me_fw_type_sps_ign
 
@@ -1572,6 +1580,18 @@ static const struct mei_cfg mei_me_pch15_sps_cfg = {
 	MEI_CFG_FW_SPS_IGN,
 };
 
+/* Graphics System Controller */
+static const struct mei_cfg mei_me_gsc_cfg = {
+	MEI_CFG_TYPE_GSC,
+	MEI_CFG_PCH8_HFS,
+};
+
+/* Graphics System Controller Firmware Interface */
+static const struct mei_cfg mei_me_gscfi_cfg = {
+	MEI_CFG_TYPE_GSCFI,
+	MEI_CFG_PCH8_HFS,
+};
+
 /*
  * mei_cfg_list - A list of platform platform specific configurations.
  * Note: has to be synchronized with  enum mei_cfg_idx.
@@ -1592,6 +1612,8 @@ static const struct mei_cfg *const mei_cfg_list[] = {
 	[MEI_ME_PCH12_SPS_ITOUCH_CFG] = &mei_me_pch12_itouch_sps_cfg,
 	[MEI_ME_PCH15_CFG] = &mei_me_pch15_cfg,
 	[MEI_ME_PCH15_SPS_CFG] = &mei_me_pch15_sps_cfg,
+	[MEI_ME_GSC_CFG] = &mei_me_gsc_cfg,
+	[MEI_ME_GSCFI_CFG] = &mei_me_gscfi_cfg,
 };
 
 const struct mei_cfg *mei_me_get_cfg(kernel_ulong_t idx)
@@ -1602,7 +1624,8 @@ const struct mei_cfg *mei_me_get_cfg(kernel_ulong_t idx)
 		return NULL;
 
 	return mei_cfg_list[idx];
-};
+}
+EXPORT_SYMBOL_GPL(mei_me_get_cfg);
 
 /**
  * mei_me_dev_init - allocates and initializes the mei device structure
@@ -1637,4 +1660,4 @@ struct mei_device *mei_me_dev_init(struct device *parent,
 
 	return dev;
 }
-
+EXPORT_SYMBOL_GPL(mei_me_dev_init);
diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h
index 00a7132ac7a2..a071c645e905 100644
--- a/drivers/misc/mei/hw-me.h
+++ b/drivers/misc/mei/hw-me.h
@@ -112,6 +112,8 @@ enum mei_cfg_idx {
 	MEI_ME_PCH12_SPS_ITOUCH_CFG,
 	MEI_ME_PCH15_CFG,
 	MEI_ME_PCH15_SPS_CFG,
+	MEI_ME_GSC_CFG,
+	MEI_ME_GSCFI_CFG,
 	MEI_ME_NUM_CFG,
 };
 
-- 
2.32.0

[Intel-gfx] [PATCH 02/20] mei: add support for graphics system controller (gsc) devices

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

GSC is a graphics system controller, based on CSE, it provides
a chassis controller for graphics discrete cards, as well as it
supports media protection on selected devices.

mei_gsc binds to a auxiliary devices exposed by Intel discrete
driver i915.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/misc/mei/Kconfig  |  14 +++
 drivers/misc/mei/Makefile |   3 +
 drivers/misc/mei/gsc-me.c | 194 ++++++++++++++++++++++++++++++++++++++
 drivers/misc/mei/hw-me.c  |  27 +++++-
 drivers/misc/mei/hw-me.h  |   2 +
 5 files changed, 238 insertions(+), 2 deletions(-)
 create mode 100644 drivers/misc/mei/gsc-me.c

diff --git a/drivers/misc/mei/Kconfig b/drivers/misc/mei/Kconfig
index 0e0bcd0da852..d21486d69df2 100644
--- a/drivers/misc/mei/Kconfig
+++ b/drivers/misc/mei/Kconfig
@@ -46,6 +46,20 @@ config INTEL_MEI_TXE
 	  Supported SoCs:
 	  Intel Bay Trail
 
+config INTEL_MEI_GSC
+	tristate "Intel MEI GSC embedded device"
+	depends on INTEL_MEI
+	depends on INTEL_MEI_ME
+	depends on X86 && PCI
+	depends on DRM_I915
+	help
+	  Intel auxiliary driver for GSC devices embedded in Intel graphics devices.
+
+	  An MEI device here called GSC can be embedded in an
+	  Intel graphics devices, to support a range of chassis
+	  tasks such as graphics card firmware update and security
+	  tasks.
+
 source "drivers/misc/mei/hdcp/Kconfig"
 source "drivers/misc/mei/pxp/Kconfig"
 
diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile
index d8e5165917f2..fb740d754900 100644
--- a/drivers/misc/mei/Makefile
+++ b/drivers/misc/mei/Makefile
@@ -18,6 +18,9 @@ obj-$(CONFIG_INTEL_MEI_ME) += mei-me.o
 mei-me-objs := pci-me.o
 mei-me-objs += hw-me.o
 
+obj-$(CONFIG_INTEL_MEI_GSC) += mei-gsc.o
+mei-gsc-objs := gsc-me.o
+
 obj-$(CONFIG_INTEL_MEI_TXE) += mei-txe.o
 mei-txe-objs := pci-txe.o
 mei-txe-objs += hw-txe.o
diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
new file mode 100644
index 000000000000..64b02adf3149
--- /dev/null
+++ b/drivers/misc/mei/gsc-me.c
@@ -0,0 +1,194 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright(c) 2019-2022, Intel Corporation. All rights reserved.
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ */
+
+#include <linux/module.h>
+#include <linux/mei_aux.h>
+#include <linux/device.h>
+#include <linux/irqreturn.h>
+#include <linux/jiffies.h>
+#include <linux/ktime.h>
+#include <linux/delay.h>
+#include <linux/pm_runtime.h>
+
+#include "mei_dev.h"
+#include "hw-me.h"
+#include "hw-me-regs.h"
+
+#include "mei-trace.h"
+
+#define MEI_GSC_RPM_TIMEOUT 500
+
+static int mei_gsc_read_hfs(const struct mei_device *dev, int where, u32 *val)
+{
+	struct mei_me_hw *hw = to_me_hw(dev);
+
+	*val = ioread32(hw->mem_addr + where + 0xC00);
+
+	return 0;
+}
+
+static int mei_gsc_probe(struct auxiliary_device *aux_dev,
+			 const struct auxiliary_device_id *aux_dev_id)
+{
+	struct mei_aux_device *adev = auxiliary_dev_to_mei_aux_dev(aux_dev);
+	struct mei_device *dev;
+	struct mei_me_hw *hw;
+	struct device *device;
+	const struct mei_cfg *cfg;
+	int ret;
+
+	cfg = mei_me_get_cfg(aux_dev_id->driver_data);
+	if (!cfg)
+		return -ENODEV;
+
+	device = &aux_dev->dev;
+
+	dev = mei_me_dev_init(device, cfg);
+	if (IS_ERR(dev)) {
+		ret = PTR_ERR(dev);
+		goto err;
+	}
+
+	hw = to_me_hw(dev);
+	hw->mem_addr = devm_ioremap_resource(device, &adev->bar);
+	if (IS_ERR(hw->mem_addr)) {
+		dev_err(device, "mmio not mapped\n");
+		ret = PTR_ERR(hw->mem_addr);
+		goto err;
+	}
+
+	hw->irq = adev->irq;
+	hw->read_fws = mei_gsc_read_hfs;
+
+	dev_set_drvdata(device, dev);
+
+	ret = devm_request_threaded_irq(device, hw->irq,
+					mei_me_irq_quick_handler,
+					mei_me_irq_thread_handler,
+					IRQF_ONESHOT, KBUILD_MODNAME, dev);
+	if (ret) {
+		dev_err(device, "irq register failed %d\n", ret);
+		goto err;
+	}
+
+	pm_runtime_get_noresume(device);
+	pm_runtime_set_active(device);
+	pm_runtime_enable(device);
+
+	if (mei_start(dev)) {
+		dev_err(device, "init hw failure.\n");
+		ret = -ENODEV;
+		goto irq_err;
+	}
+
+	pm_runtime_set_autosuspend_delay(device, MEI_GSC_RPM_TIMEOUT);
+	pm_runtime_use_autosuspend(device);
+
+	ret = mei_register(dev, device);
+	if (ret)
+		goto register_err;
+
+	pm_runtime_put_noidle(device);
+	return 0;
+
+register_err:
+	mei_stop(dev);
+irq_err:
+	devm_free_irq(device, hw->irq, dev);
+
+err:
+	dev_err(device, "probe failed: %d\n", ret);
+	dev_set_drvdata(device, NULL);
+	return ret;
+}
+
+static void mei_gsc_remove(struct auxiliary_device *aux_dev)
+{
+	struct mei_device *dev;
+	struct mei_me_hw *hw;
+
+	dev = dev_get_drvdata(&aux_dev->dev);
+	if (!dev)
+		return;
+
+	hw = to_me_hw(dev);
+
+	mei_stop(dev);
+
+	mei_deregister(dev);
+
+	pm_runtime_disable(&aux_dev->dev);
+
+	mei_disable_interrupts(dev);
+	devm_free_irq(&aux_dev->dev, hw->irq, dev);
+}
+
+static int __maybe_unused mei_gsc_pm_suspend(struct device *device)
+{
+	struct mei_device *dev = dev_get_drvdata(device);
+
+	if (!dev)
+		return -ENODEV;
+
+	mei_stop(dev);
+
+	mei_disable_interrupts(dev);
+
+	return 0;
+}
+
+static int __maybe_unused mei_gsc_pm_resume(struct device *device)
+{
+	struct mei_device *dev = dev_get_drvdata(device);
+	int err;
+
+	if (!dev)
+		return -ENODEV;
+
+	err = mei_restart(dev);
+	if (err)
+		return err;
+
+	/* Start timer if stopped in suspend */
+	schedule_delayed_work(&dev->timer_work, HZ);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(mei_gsc_pm_ops, mei_gsc_pm_suspend, mei_gsc_pm_resume);
+
+static const struct auxiliary_device_id mei_gsc_id_table[] = {
+	{
+		.name = "i915.mei-gsc",
+		.driver_data = MEI_ME_GSC_CFG,
+
+	},
+	{
+		.name = "i915.mei-gscfi",
+		.driver_data = MEI_ME_GSCFI_CFG,
+	},
+	{
+		/* sentinel */
+	}
+};
+MODULE_DEVICE_TABLE(auxiliary, mei_gsc_id_table);
+
+static struct auxiliary_driver mei_gsc_driver = {
+	.probe	= mei_gsc_probe,
+	.remove = mei_gsc_remove,
+	.driver = {
+		/* auxiliary_driver_register() sets .name to be the modname */
+		.pm = &mei_gsc_pm_ops,
+	},
+	.id_table = mei_gsc_id_table
+};
+module_auxiliary_driver(mei_gsc_driver);
+
+MODULE_AUTHOR("Intel Corporation");
+MODULE_ALIAS("auxiliary:i915.mei-gsc");
+MODULE_ALIAS("auxiliary:i915.mei-gscfi");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 719fee9af156..03945d3b34da 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -1226,6 +1226,7 @@ irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id)
 	me_intr_disable(dev, hcsr);
 	return IRQ_WAKE_THREAD;
 }
+EXPORT_SYMBOL_GPL(mei_me_irq_quick_handler);
 
 /**
  * mei_me_irq_thread_handler - function called after ISR to handle the interrupt
@@ -1326,6 +1327,7 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
 	mutex_unlock(&dev->device_lock);
 	return IRQ_HANDLED;
 }
+EXPORT_SYMBOL_GPL(mei_me_irq_thread_handler);
 
 static const struct mei_hw_ops mei_me_hw_ops = {
 
@@ -1440,6 +1442,12 @@ static bool mei_me_fw_type_sps_ign(const struct pci_dev *pdev)
 #define MEI_CFG_KIND_ITOUCH                     \
 	.kind = "itouch"
 
+#define MEI_CFG_TYPE_GSC                        \
+	.kind = "gsc"
+
+#define MEI_CFG_TYPE_GSCFI                      \
+	.kind = "gscfi"
+
 #define MEI_CFG_FW_SPS_IGN                      \
 	.quirk_probe = mei_me_fw_type_sps_ign
 
@@ -1572,6 +1580,18 @@ static const struct mei_cfg mei_me_pch15_sps_cfg = {
 	MEI_CFG_FW_SPS_IGN,
 };
 
+/* Graphics System Controller */
+static const struct mei_cfg mei_me_gsc_cfg = {
+	MEI_CFG_TYPE_GSC,
+	MEI_CFG_PCH8_HFS,
+};
+
+/* Graphics System Controller Firmware Interface */
+static const struct mei_cfg mei_me_gscfi_cfg = {
+	MEI_CFG_TYPE_GSCFI,
+	MEI_CFG_PCH8_HFS,
+};
+
 /*
  * mei_cfg_list - A list of platform platform specific configurations.
  * Note: has to be synchronized with  enum mei_cfg_idx.
@@ -1592,6 +1612,8 @@ static const struct mei_cfg *const mei_cfg_list[] = {
 	[MEI_ME_PCH12_SPS_ITOUCH_CFG] = &mei_me_pch12_itouch_sps_cfg,
 	[MEI_ME_PCH15_CFG] = &mei_me_pch15_cfg,
 	[MEI_ME_PCH15_SPS_CFG] = &mei_me_pch15_sps_cfg,
+	[MEI_ME_GSC_CFG] = &mei_me_gsc_cfg,
+	[MEI_ME_GSCFI_CFG] = &mei_me_gscfi_cfg,
 };
 
 const struct mei_cfg *mei_me_get_cfg(kernel_ulong_t idx)
@@ -1602,7 +1624,8 @@ const struct mei_cfg *mei_me_get_cfg(kernel_ulong_t idx)
 		return NULL;
 
 	return mei_cfg_list[idx];
-};
+}
+EXPORT_SYMBOL_GPL(mei_me_get_cfg);
 
 /**
  * mei_me_dev_init - allocates and initializes the mei device structure
@@ -1637,4 +1660,4 @@ struct mei_device *mei_me_dev_init(struct device *parent,
 
 	return dev;
 }
-
+EXPORT_SYMBOL_GPL(mei_me_dev_init);
diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h
index 00a7132ac7a2..a071c645e905 100644
--- a/drivers/misc/mei/hw-me.h
+++ b/drivers/misc/mei/hw-me.h
@@ -112,6 +112,8 @@ enum mei_cfg_idx {
 	MEI_ME_PCH12_SPS_ITOUCH_CFG,
 	MEI_ME_PCH15_CFG,
 	MEI_ME_PCH15_SPS_CFG,
+	MEI_ME_GSC_CFG,
+	MEI_ME_GSCFI_CFG,
 	MEI_ME_NUM_CFG,
 };
 
-- 
2.32.0

[PATCH 03/20] mei: gsc: setup char driver alive in spite of firmware handshake failure

[Alexander Usyskin]

Setup char device in spite of firmware handshake failure.
In order to provide host access to the firmware status registers and other
information required for the manufacturing process.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/misc/mei/gsc-me.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index 64b02adf3149..58e39c00f150 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -79,11 +79,12 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
 	pm_runtime_set_active(device);
 	pm_runtime_enable(device);
 
-	if (mei_start(dev)) {
-		dev_err(device, "init hw failure.\n");
-		ret = -ENODEV;
-		goto irq_err;
-	}
+	/* Continue to char device setup in spite of firmware handshake failure.
+	 * In order to provide access to the firmware status registers to the user
+	 * space via sysfs.
+	 */
+	if (mei_start(dev))
+		dev_warn(device, "init hw failure.\n");
 
 	pm_runtime_set_autosuspend_delay(device, MEI_GSC_RPM_TIMEOUT);
 	pm_runtime_use_autosuspend(device);
@@ -97,7 +98,6 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
 
 register_err:
 	mei_stop(dev);
-irq_err:
 	devm_free_irq(device, hw->irq, dev);
 
 err:
-- 
2.32.0

[Intel-gfx] [PATCH 03/20] mei: gsc: setup char driver alive in spite of firmware handshake failure

[Alexander Usyskin]

Setup char device in spite of firmware handshake failure.
In order to provide host access to the firmware status registers and other
information required for the manufacturing process.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/misc/mei/gsc-me.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index 64b02adf3149..58e39c00f150 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -79,11 +79,12 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
 	pm_runtime_set_active(device);
 	pm_runtime_enable(device);
 
-	if (mei_start(dev)) {
-		dev_err(device, "init hw failure.\n");
-		ret = -ENODEV;
-		goto irq_err;
-	}
+	/* Continue to char device setup in spite of firmware handshake failure.
+	 * In order to provide access to the firmware status registers to the user
+	 * space via sysfs.
+	 */
+	if (mei_start(dev))
+		dev_warn(device, "init hw failure.\n");
 
 	pm_runtime_set_autosuspend_delay(device, MEI_GSC_RPM_TIMEOUT);
 	pm_runtime_use_autosuspend(device);
@@ -97,7 +98,6 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
 
 register_err:
 	mei_stop(dev);
-irq_err:
 	devm_free_irq(device, hw->irq, dev);
 
 err:
-- 
2.32.0

[PATCH 04/20] mei: gsc: add runtime pm handlers

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

Implement runtime handlers for mei-gsc, to track
idle state of the device properly.

CC: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---
 drivers/misc/mei/gsc-me.c | 67 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 66 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index 58e39c00f150..32ea75f5e7aa 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -159,7 +159,72 @@ static int __maybe_unused mei_gsc_pm_resume(struct device *device)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(mei_gsc_pm_ops, mei_gsc_pm_suspend, mei_gsc_pm_resume);
+static int __maybe_unused mei_gsc_pm_runtime_idle(struct device *device)
+{
+	struct mei_device *dev = dev_get_drvdata(device);
+
+	if (!dev)
+		return -ENODEV;
+	if (mei_write_is_idle(dev))
+		pm_runtime_autosuspend(device);
+
+	return -EBUSY;
+}
+
+static int  __maybe_unused mei_gsc_pm_runtime_suspend(struct device *device)
+{
+	struct mei_device *dev = dev_get_drvdata(device);
+	struct mei_me_hw *hw;
+	int ret;
+
+	if (!dev)
+		return -ENODEV;
+
+	mutex_lock(&dev->device_lock);
+
+	if (mei_write_is_idle(dev)) {
+		hw = to_me_hw(dev);
+		hw->pg_state = MEI_PG_ON;
+		ret = 0;
+	} else {
+		ret = -EAGAIN;
+	}
+
+	mutex_unlock(&dev->device_lock);
+
+	return ret;
+}
+
+static int __maybe_unused mei_gsc_pm_runtime_resume(struct device *device)
+{
+	struct mei_device *dev = dev_get_drvdata(device);
+	struct mei_me_hw *hw;
+	irqreturn_t irq_ret;
+
+	if (!dev)
+		return -ENODEV;
+
+	mutex_lock(&dev->device_lock);
+
+	hw = to_me_hw(dev);
+	hw->pg_state = MEI_PG_OFF;
+
+	mutex_unlock(&dev->device_lock);
+
+	irq_ret = mei_me_irq_thread_handler(1, dev);
+	if (irq_ret != IRQ_HANDLED)
+		dev_err(dev->dev, "thread handler fail %d\n", irq_ret);
+
+	return 0;
+}
+
+static const struct dev_pm_ops mei_gsc_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(mei_gsc_pm_suspend,
+				mei_gsc_pm_resume)
+	SET_RUNTIME_PM_OPS(mei_gsc_pm_runtime_suspend,
+			   mei_gsc_pm_runtime_resume,
+			   mei_gsc_pm_runtime_idle)
+};
 
 static const struct auxiliary_device_id mei_gsc_id_table[] = {
 	{
-- 
2.32.0

[Intel-gfx] [PATCH 04/20] mei: gsc: add runtime pm handlers

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

Implement runtime handlers for mei-gsc, to track
idle state of the device properly.

CC: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---
 drivers/misc/mei/gsc-me.c | 67 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 66 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index 58e39c00f150..32ea75f5e7aa 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -159,7 +159,72 @@ static int __maybe_unused mei_gsc_pm_resume(struct device *device)
 	return 0;
 }
 
-static SIMPLE_DEV_PM_OPS(mei_gsc_pm_ops, mei_gsc_pm_suspend, mei_gsc_pm_resume);
+static int __maybe_unused mei_gsc_pm_runtime_idle(struct device *device)
+{
+	struct mei_device *dev = dev_get_drvdata(device);
+
+	if (!dev)
+		return -ENODEV;
+	if (mei_write_is_idle(dev))
+		pm_runtime_autosuspend(device);
+
+	return -EBUSY;
+}
+
+static int  __maybe_unused mei_gsc_pm_runtime_suspend(struct device *device)
+{
+	struct mei_device *dev = dev_get_drvdata(device);
+	struct mei_me_hw *hw;
+	int ret;
+
+	if (!dev)
+		return -ENODEV;
+
+	mutex_lock(&dev->device_lock);
+
+	if (mei_write_is_idle(dev)) {
+		hw = to_me_hw(dev);
+		hw->pg_state = MEI_PG_ON;
+		ret = 0;
+	} else {
+		ret = -EAGAIN;
+	}
+
+	mutex_unlock(&dev->device_lock);
+
+	return ret;
+}
+
+static int __maybe_unused mei_gsc_pm_runtime_resume(struct device *device)
+{
+	struct mei_device *dev = dev_get_drvdata(device);
+	struct mei_me_hw *hw;
+	irqreturn_t irq_ret;
+
+	if (!dev)
+		return -ENODEV;
+
+	mutex_lock(&dev->device_lock);
+
+	hw = to_me_hw(dev);
+	hw->pg_state = MEI_PG_OFF;
+
+	mutex_unlock(&dev->device_lock);
+
+	irq_ret = mei_me_irq_thread_handler(1, dev);
+	if (irq_ret != IRQ_HANDLED)
+		dev_err(dev->dev, "thread handler fail %d\n", irq_ret);
+
+	return 0;
+}
+
+static const struct dev_pm_ops mei_gsc_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(mei_gsc_pm_suspend,
+				mei_gsc_pm_resume)
+	SET_RUNTIME_PM_OPS(mei_gsc_pm_runtime_suspend,
+			   mei_gsc_pm_runtime_resume,
+			   mei_gsc_pm_runtime_idle)
+};
 
 static const struct auxiliary_device_id mei_gsc_id_table[] = {
 	{
-- 
2.32.0

[PATCH 05/20] mei: gsc: retrieve the firmware version

[Alexander Usyskin]

Add a hook to retrieve the firmware version of the
GSC devices to bus-fixup.
GSC has a different MKHI clients GUIDs but the same message structure
to retrieve the firmware version as MEI so mei_fwver() can be reused.

CC: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/misc/mei/bus-fixup.c | 25 +++++++++++++++++++++++++
 drivers/misc/mei/hw-me.c     |  2 ++
 2 files changed, 27 insertions(+)

diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
index 67844089db21..59506ba6fc48 100644
--- a/drivers/misc/mei/bus-fixup.c
+++ b/drivers/misc/mei/bus-fixup.c
@@ -30,6 +30,12 @@ static const uuid_le mei_nfc_info_guid = MEI_UUID_NFC_INFO;
 #define MEI_UUID_MKHIF_FIX UUID_LE(0x55213584, 0x9a29, 0x4916, \
 			0xba, 0xdf, 0xf, 0xb7, 0xed, 0x68, 0x2a, 0xeb)
 
+#define MEI_UUID_IGSC_MKHI UUID_LE(0xE2C2AFA2, 0x3817, 0x4D19, \
+			0x9D, 0x95, 0x06, 0xB1, 0x6B, 0x58, 0x8A, 0x5D)
+
+#define MEI_UUID_IGSC_MKHI_FIX UUID_LE(0x46E0C1FB, 0xA546, 0x414F, \
+			0x91, 0x70, 0xB7, 0xF4, 0x6D, 0x57, 0xB4, 0xAD)
+
 #define MEI_UUID_HDCP UUID_LE(0xB638AB7E, 0x94E2, 0x4EA2, \
 			      0xA5, 0x52, 0xD1, 0xC5, 0x4B, 0x62, 0x7F, 0x04)
 
@@ -241,6 +247,23 @@ static void mei_mkhi_fix(struct mei_cl_device *cldev)
 	mei_cldev_disable(cldev);
 }
 
+static void mei_gsc_mkhi_ver(struct mei_cl_device *cldev)
+{
+	int ret;
+
+	/* No need to enable the client if nothing is needed from it */
+	if (!cldev->bus->fw_f_fw_ver_supported)
+		return;
+
+	ret = mei_cldev_enable(cldev);
+	if (ret)
+		return;
+
+	ret = mei_fwver(cldev);
+	if (ret < 0)
+		dev_err(&cldev->dev, "FW version command failed %d\n", ret);
+	mei_cldev_disable(cldev);
+}
 /**
  * mei_wd - wd client on the bus, change protocol version
  *   as the API has changed.
@@ -492,6 +515,8 @@ static struct mei_fixup {
 	MEI_FIXUP(MEI_UUID_NFC_HCI, mei_nfc),
 	MEI_FIXUP(MEI_UUID_WD, mei_wd),
 	MEI_FIXUP(MEI_UUID_MKHIF_FIX, mei_mkhi_fix),
+	MEI_FIXUP(MEI_UUID_IGSC_MKHI, mei_gsc_mkhi_ver),
+	MEI_FIXUP(MEI_UUID_IGSC_MKHI_FIX, mei_gsc_mkhi_ver),
 	MEI_FIXUP(MEI_UUID_HDCP, whitelist),
 	MEI_FIXUP(MEI_UUID_ANY, vt_support),
 	MEI_FIXUP(MEI_UUID_PAVP, whitelist),
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 03945d3b34da..9870bf717979 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -1584,12 +1584,14 @@ static const struct mei_cfg mei_me_pch15_sps_cfg = {
 static const struct mei_cfg mei_me_gsc_cfg = {
 	MEI_CFG_TYPE_GSC,
 	MEI_CFG_PCH8_HFS,
+	MEI_CFG_FW_VER_SUPP,
 };
 
 /* Graphics System Controller Firmware Interface */
 static const struct mei_cfg mei_me_gscfi_cfg = {
 	MEI_CFG_TYPE_GSCFI,
 	MEI_CFG_PCH8_HFS,
+	MEI_CFG_FW_VER_SUPP,
 };
 
 /*
-- 
2.32.0

[Intel-gfx] [PATCH 05/20] mei: gsc: retrieve the firmware version

[Alexander Usyskin]

Add a hook to retrieve the firmware version of the
GSC devices to bus-fixup.
GSC has a different MKHI clients GUIDs but the same message structure
to retrieve the firmware version as MEI so mei_fwver() can be reused.

CC: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/misc/mei/bus-fixup.c | 25 +++++++++++++++++++++++++
 drivers/misc/mei/hw-me.c     |  2 ++
 2 files changed, 27 insertions(+)

diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
index 67844089db21..59506ba6fc48 100644
--- a/drivers/misc/mei/bus-fixup.c
+++ b/drivers/misc/mei/bus-fixup.c
@@ -30,6 +30,12 @@ static const uuid_le mei_nfc_info_guid = MEI_UUID_NFC_INFO;
 #define MEI_UUID_MKHIF_FIX UUID_LE(0x55213584, 0x9a29, 0x4916, \
 			0xba, 0xdf, 0xf, 0xb7, 0xed, 0x68, 0x2a, 0xeb)
 
+#define MEI_UUID_IGSC_MKHI UUID_LE(0xE2C2AFA2, 0x3817, 0x4D19, \
+			0x9D, 0x95, 0x06, 0xB1, 0x6B, 0x58, 0x8A, 0x5D)
+
+#define MEI_UUID_IGSC_MKHI_FIX UUID_LE(0x46E0C1FB, 0xA546, 0x414F, \
+			0x91, 0x70, 0xB7, 0xF4, 0x6D, 0x57, 0xB4, 0xAD)
+
 #define MEI_UUID_HDCP UUID_LE(0xB638AB7E, 0x94E2, 0x4EA2, \
 			      0xA5, 0x52, 0xD1, 0xC5, 0x4B, 0x62, 0x7F, 0x04)
 
@@ -241,6 +247,23 @@ static void mei_mkhi_fix(struct mei_cl_device *cldev)
 	mei_cldev_disable(cldev);
 }
 
+static void mei_gsc_mkhi_ver(struct mei_cl_device *cldev)
+{
+	int ret;
+
+	/* No need to enable the client if nothing is needed from it */
+	if (!cldev->bus->fw_f_fw_ver_supported)
+		return;
+
+	ret = mei_cldev_enable(cldev);
+	if (ret)
+		return;
+
+	ret = mei_fwver(cldev);
+	if (ret < 0)
+		dev_err(&cldev->dev, "FW version command failed %d\n", ret);
+	mei_cldev_disable(cldev);
+}
 /**
  * mei_wd - wd client on the bus, change protocol version
  *   as the API has changed.
@@ -492,6 +515,8 @@ static struct mei_fixup {
 	MEI_FIXUP(MEI_UUID_NFC_HCI, mei_nfc),
 	MEI_FIXUP(MEI_UUID_WD, mei_wd),
 	MEI_FIXUP(MEI_UUID_MKHIF_FIX, mei_mkhi_fix),
+	MEI_FIXUP(MEI_UUID_IGSC_MKHI, mei_gsc_mkhi_ver),
+	MEI_FIXUP(MEI_UUID_IGSC_MKHI_FIX, mei_gsc_mkhi_ver),
 	MEI_FIXUP(MEI_UUID_HDCP, whitelist),
 	MEI_FIXUP(MEI_UUID_ANY, vt_support),
 	MEI_FIXUP(MEI_UUID_PAVP, whitelist),
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 03945d3b34da..9870bf717979 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -1584,12 +1584,14 @@ static const struct mei_cfg mei_me_pch15_sps_cfg = {
 static const struct mei_cfg mei_me_gsc_cfg = {
 	MEI_CFG_TYPE_GSC,
 	MEI_CFG_PCH8_HFS,
+	MEI_CFG_FW_VER_SUPP,
 };
 
 /* Graphics System Controller Firmware Interface */
 static const struct mei_cfg mei_me_gscfi_cfg = {
 	MEI_CFG_TYPE_GSCFI,
 	MEI_CFG_PCH8_HFS,
+	MEI_CFG_FW_VER_SUPP,
 };
 
 /*
-- 
2.32.0

[PATCH 06/20] HAX: drm/i915: force INTEL_MEI_GSC on for CI

[Alexander Usyskin]

From: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

After the new config option is merged we'll enable it by default in the
CI config, but for now just force it on via the i915 Kconfig so we can
get pre-merge CI results for it.

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/gpu/drm/i915/Kconfig.debug | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/Kconfig.debug b/drivers/gpu/drm/i915/Kconfig.debug
index e7fd3e76f8a2..be4ef485d6c1 100644
--- a/drivers/gpu/drm/i915/Kconfig.debug
+++ b/drivers/gpu/drm/i915/Kconfig.debug
@@ -48,6 +48,7 @@ config DRM_I915_DEBUG
 	select DRM_I915_DEBUG_RUNTIME_PM
 	select DRM_I915_SW_FENCE_DEBUG_OBJECTS
 	select DRM_I915_SELFTEST
+	select INTEL_MEI_GSC
 	select BROKEN # for prototype uAPI
 	default n
 	help
-- 
2.32.0

[Intel-gfx] [PATCH 06/20] HAX: drm/i915: force INTEL_MEI_GSC on for CI

[Alexander Usyskin]

From: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

After the new config option is merged we'll enable it by default in the
CI config, but for now just force it on via the i915 Kconfig so we can
get pre-merge CI results for it.

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
---
 drivers/gpu/drm/i915/Kconfig.debug | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/Kconfig.debug b/drivers/gpu/drm/i915/Kconfig.debug
index e7fd3e76f8a2..be4ef485d6c1 100644
--- a/drivers/gpu/drm/i915/Kconfig.debug
+++ b/drivers/gpu/drm/i915/Kconfig.debug
@@ -48,6 +48,7 @@ config DRM_I915_DEBUG
 	select DRM_I915_DEBUG_RUNTIME_PM
 	select DRM_I915_SW_FENCE_DEBUG_OBJECTS
 	select DRM_I915_SELFTEST
+	select INTEL_MEI_GSC
 	select BROKEN # for prototype uAPI
 	default n
 	help
-- 
2.32.0

[PATCH 07/20] drm/i915/gsc: skip irq initialization if using polling

[Alexander Usyskin]

From: Vitaly Lubart <vitaly.lubart@intel.com>

If we use polling instead of interrupts,
irq initialization should be skipped.

Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gsc.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
index 21e860861f0b..280dba4fd32d 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.c
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
@@ -40,6 +40,7 @@ struct gsc_def {
 	const char *name;
 	unsigned long bar;
 	size_t bar_size;
+	bool use_polling;
 };
 
 /* gsc resources and definitions (HECI1 and HECI2) */
@@ -97,6 +98,10 @@ static void gsc_init_one(struct drm_i915_private *i915,
 		return;
 	}
 
+	/* skip irq initialization */
+	if (def->use_polling)
+		goto add_device;
+
 	intf->irq = irq_alloc_desc(0);
 	if (intf->irq < 0) {
 		drm_err(&i915->drm, "gsc irq error %d\n", intf->irq);
@@ -109,6 +114,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
 		goto fail;
 	}
 
+add_device:
 	adev = kzalloc(sizeof(*adev), GFP_KERNEL);
 	if (!adev)
 		goto fail;
@@ -162,10 +168,8 @@ static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
 		return;
 	}
 
-	if (gt->gsc.intf[intf_id].irq < 0) {
-		drm_err_ratelimited(&gt->i915->drm, "GSC irq: irq not set");
+	if (gt->gsc.intf[intf_id].irq < 0)
 		return;
-	}
 
 	ret = generic_handle_irq(gt->gsc.intf[intf_id].irq);
 	if (ret)
-- 
2.32.0

[Intel-gfx] [PATCH 07/20] drm/i915/gsc: skip irq initialization if using polling

[Alexander Usyskin]

From: Vitaly Lubart <vitaly.lubart@intel.com>

If we use polling instead of interrupts,
irq initialization should be skipped.

Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gsc.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
index 21e860861f0b..280dba4fd32d 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.c
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
@@ -40,6 +40,7 @@ struct gsc_def {
 	const char *name;
 	unsigned long bar;
 	size_t bar_size;
+	bool use_polling;
 };
 
 /* gsc resources and definitions (HECI1 and HECI2) */
@@ -97,6 +98,10 @@ static void gsc_init_one(struct drm_i915_private *i915,
 		return;
 	}
 
+	/* skip irq initialization */
+	if (def->use_polling)
+		goto add_device;
+
 	intf->irq = irq_alloc_desc(0);
 	if (intf->irq < 0) {
 		drm_err(&i915->drm, "gsc irq error %d\n", intf->irq);
@@ -109,6 +114,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
 		goto fail;
 	}
 
+add_device:
 	adev = kzalloc(sizeof(*adev), GFP_KERNEL);
 	if (!adev)
 		goto fail;
@@ -162,10 +168,8 @@ static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
 		return;
 	}
 
-	if (gt->gsc.intf[intf_id].irq < 0) {
-		drm_err_ratelimited(&gt->i915->drm, "GSC irq: irq not set");
+	if (gt->gsc.intf[intf_id].irq < 0)
 		return;
-	}
 
 	ret = generic_handle_irq(gt->gsc.intf[intf_id].irq);
 	if (ret)
-- 
2.32.0

[PATCH 08/20] drm/i915/gsc: add slow_fw flag to the mei auxiliary device

[Alexander Usyskin]

Add slow_fw flag to the mei auxiliary device info
to inform the mei driver about slow underlying firmware.
Such firmware will require to use larger operation timeouts.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 include/linux/mei_aux.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/mei_aux.h b/include/linux/mei_aux.h
index 587f25128848..a29f4064b9c0 100644
--- a/include/linux/mei_aux.h
+++ b/include/linux/mei_aux.h
@@ -11,6 +11,7 @@ struct mei_aux_device {
 	struct auxiliary_device aux_dev;
 	int irq;
 	struct resource bar;
+	bool slow_fw;
 };
 
 #define auxiliary_dev_to_mei_aux_dev(auxiliary_dev) \
-- 
2.32.0

[Intel-gfx] [PATCH 08/20] drm/i915/gsc: add slow_fw flag to the mei auxiliary device

[Alexander Usyskin]

Add slow_fw flag to the mei auxiliary device info
to inform the mei driver about slow underlying firmware.
Such firmware will require to use larger operation timeouts.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 include/linux/mei_aux.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/mei_aux.h b/include/linux/mei_aux.h
index 587f25128848..a29f4064b9c0 100644
--- a/include/linux/mei_aux.h
+++ b/include/linux/mei_aux.h
@@ -11,6 +11,7 @@ struct mei_aux_device {
 	struct auxiliary_device aux_dev;
 	int irq;
 	struct resource bar;
+	bool slow_fw;
 };
 
 #define auxiliary_dev_to_mei_aux_dev(auxiliary_dev) \
-- 
2.32.0

[Intel-gfx] [PATCH 09/20] drm/i915/gsc: add slow_fw flag to the gsc device definition

[Alexander Usyskin]

Add slow_fw flag to the gsc device definition
and pass it to mei auxiliary device.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gsc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
index 280dba4fd32d..175571c6f71d 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.c
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
@@ -41,6 +41,7 @@ struct gsc_def {
 	unsigned long bar;
 	size_t bar_size;
 	bool use_polling;
+	bool slow_fw;
 };
 
 /* gsc resources and definitions (HECI1 and HECI2) */
@@ -125,6 +126,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
 	adev->bar.end = adev->bar.start + def->bar_size - 1;
 	adev->bar.flags = IORESOURCE_MEM;
 	adev->bar.desc = IORES_DESC_NONE;
+	adev->slow_fw = def->slow_fw;
 
 	aux_dev = &adev->aux_dev;
 	aux_dev->name = def->name;
-- 
2.32.0

[PATCH 09/20] drm/i915/gsc: add slow_fw flag to the gsc device definition

[Alexander Usyskin]

Add slow_fw flag to the gsc device definition
and pass it to mei auxiliary device.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gsc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
index 280dba4fd32d..175571c6f71d 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.c
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
@@ -41,6 +41,7 @@ struct gsc_def {
 	unsigned long bar;
 	size_t bar_size;
 	bool use_polling;
+	bool slow_fw;
 };
 
 /* gsc resources and definitions (HECI1 and HECI2) */
@@ -125,6 +126,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
 	adev->bar.end = adev->bar.start + def->bar_size - 1;
 	adev->bar.flags = IORESOURCE_MEM;
 	adev->bar.desc = IORES_DESC_NONE;
+	adev->slow_fw = def->slow_fw;
 
 	aux_dev = &adev->aux_dev;
 	aux_dev->name = def->name;
-- 
2.32.0

[Intel-gfx] [PATCH 10/20] drm/i915/gsc: add GSC XeHP SDV platform definition

[Alexander Usyskin]

Define GSC on XeHP SDV (Intel(R) dGPU without display)

XeHP SDV uses the same hardware settings as DG1, but uses polling
instead of interrupts and runs the firmware in slow pace due to
hardware limitations.

Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gsc.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
index 175571c6f71d..ffe6716590f0 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.c
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
@@ -56,6 +56,19 @@ static const struct gsc_def gsc_def_dg1[] = {
 	}
 };
 
+static const struct gsc_def gsc_def_xehpsdv[] = {
+	{
+		/* HECI1 not enabled on the device. */
+	},
+	{
+		.name = "mei-gscfi",
+		.bar = DG1_GSC_HECI2_BASE,
+		.bar_size = GSC_BAR_LENGTH,
+		.use_polling = true,
+		.slow_fw = true,
+	}
+};
+
 static void gsc_release_dev(struct device *dev)
 {
 	struct auxiliary_device *aux_dev = to_auxiliary_dev(dev);
@@ -92,7 +105,14 @@ static void gsc_init_one(struct drm_i915_private *i915,
 	if (intf_id == 0 && !HAS_HECI_PXP(i915))
 		return;
 
-	def = &gsc_def_dg1[intf_id];
+	if (IS_DG1(i915)) {
+		def = &gsc_def_dg1[intf_id];
+	} else if (IS_XEHPSDV(i915)) {
+		def = &gsc_def_xehpsdv[intf_id];
+	} else {
+		drm_warn_once(&i915->drm, "Unknown platform\n");
+		return;
+	}
 
 	if (!def->name) {
 		drm_warn_once(&i915->drm, "HECI%d is not implemented!\n", intf_id + 1);
-- 
2.32.0

[PATCH 10/20] drm/i915/gsc: add GSC XeHP SDV platform definition

[Alexander Usyskin]

Define GSC on XeHP SDV (Intel(R) dGPU without display)

XeHP SDV uses the same hardware settings as DG1, but uses polling
instead of interrupts and runs the firmware in slow pace due to
hardware limitations.

Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gsc.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
index 175571c6f71d..ffe6716590f0 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.c
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
@@ -56,6 +56,19 @@ static const struct gsc_def gsc_def_dg1[] = {
 	}
 };
 
+static const struct gsc_def gsc_def_xehpsdv[] = {
+	{
+		/* HECI1 not enabled on the device. */
+	},
+	{
+		.name = "mei-gscfi",
+		.bar = DG1_GSC_HECI2_BASE,
+		.bar_size = GSC_BAR_LENGTH,
+		.use_polling = true,
+		.slow_fw = true,
+	}
+};
+
 static void gsc_release_dev(struct device *dev)
 {
 	struct auxiliary_device *aux_dev = to_auxiliary_dev(dev);
@@ -92,7 +105,14 @@ static void gsc_init_one(struct drm_i915_private *i915,
 	if (intf_id == 0 && !HAS_HECI_PXP(i915))
 		return;
 
-	def = &gsc_def_dg1[intf_id];
+	if (IS_DG1(i915)) {
+		def = &gsc_def_dg1[intf_id];
+	} else if (IS_XEHPSDV(i915)) {
+		def = &gsc_def_xehpsdv[intf_id];
+	} else {
+		drm_warn_once(&i915->drm, "Unknown platform\n");
+		return;
+	}
 
 	if (!def->name) {
 		drm_warn_once(&i915->drm, "HECI%d is not implemented!\n", intf_id + 1);
-- 
2.32.0

[Intel-gfx] [PATCH 11/20] mei: gsc: use polling instead of interrupts

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

A work-around for a HW issue in XEHPSDV that manifests itself when SW reads
a gsc register when gsc is sending an interrupt. The work-around is
to disable interrupts and to use polling instead.

Cc: James Ausmus <james.ausmus@intel.com>
Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/gsc-me.c | 48 ++++++++++++++++++++++++++------
 drivers/misc/mei/hw-me.c  | 58 ++++++++++++++++++++++++++++++++++++---
 drivers/misc/mei/hw-me.h  | 12 ++++++++
 3 files changed, 105 insertions(+), 13 deletions(-)

diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index 32ea75f5e7aa..6f262ddfd25a 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -13,6 +13,7 @@
 #include <linux/ktime.h>
 #include <linux/delay.h>
 #include <linux/pm_runtime.h>
+#include <linux/kthread.h>
 
 #include "mei_dev.h"
 #include "hw-me.h"
@@ -66,13 +67,28 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
 
 	dev_set_drvdata(device, dev);
 
-	ret = devm_request_threaded_irq(device, hw->irq,
-					mei_me_irq_quick_handler,
-					mei_me_irq_thread_handler,
-					IRQF_ONESHOT, KBUILD_MODNAME, dev);
-	if (ret) {
-		dev_err(device, "irq register failed %d\n", ret);
-		goto err;
+	/* use polling */
+	if (mei_me_hw_use_polling(hw)) {
+		mei_disable_interrupts(dev);
+		mei_clear_interrupts(dev);
+		init_waitqueue_head(&hw->wait_active);
+		hw->is_active = true; /* start in active mode for initialization */
+		hw->polling_thread = kthread_run(mei_me_polling_thread, dev,
+						 "kmegscirqd/%s", dev_name(device));
+		if (IS_ERR(hw->polling_thread)) {
+			ret = PTR_ERR(hw->polling_thread);
+			dev_err(device, "unable to create kernel thread: %d\n", ret);
+			goto err;
+		}
+	} else {
+		ret = devm_request_threaded_irq(device, hw->irq,
+						mei_me_irq_quick_handler,
+						mei_me_irq_thread_handler,
+						IRQF_ONESHOT, KBUILD_MODNAME, dev);
+		if (ret) {
+			dev_err(device, "irq register failed %d\n", ret);
+			goto err;
+		}
 	}
 
 	pm_runtime_get_noresume(device);
@@ -98,7 +114,8 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
 
 register_err:
 	mei_stop(dev);
-	devm_free_irq(device, hw->irq, dev);
+	if (!mei_me_hw_use_polling(hw))
+		devm_free_irq(device, hw->irq, dev);
 
 err:
 	dev_err(device, "probe failed: %d\n", ret);
@@ -119,12 +136,17 @@ static void mei_gsc_remove(struct auxiliary_device *aux_dev)
 
 	mei_stop(dev);
 
+	hw = to_me_hw(dev);
+	if (mei_me_hw_use_polling(hw))
+		kthread_stop(hw->polling_thread);
+
 	mei_deregister(dev);
 
 	pm_runtime_disable(&aux_dev->dev);
 
 	mei_disable_interrupts(dev);
-	devm_free_irq(&aux_dev->dev, hw->irq, dev);
+	if (!mei_me_hw_use_polling(hw))
+		devm_free_irq(&aux_dev->dev, hw->irq, dev);
 }
 
 static int __maybe_unused mei_gsc_pm_suspend(struct device *device)
@@ -185,6 +207,9 @@ static int  __maybe_unused mei_gsc_pm_runtime_suspend(struct device *device)
 	if (mei_write_is_idle(dev)) {
 		hw = to_me_hw(dev);
 		hw->pg_state = MEI_PG_ON;
+
+		if (mei_me_hw_use_polling(hw))
+			hw->is_active = false;
 		ret = 0;
 	} else {
 		ret = -EAGAIN;
@@ -209,6 +234,11 @@ static int __maybe_unused mei_gsc_pm_runtime_resume(struct device *device)
 	hw = to_me_hw(dev);
 	hw->pg_state = MEI_PG_OFF;
 
+	if (mei_me_hw_use_polling(hw)) {
+		hw->is_active = true;
+		wake_up(&hw->wait_active);
+	}
+
 	mutex_unlock(&dev->device_lock);
 
 	irq_ret = mei_me_irq_thread_handler(1, dev);
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 9870bf717979..959b3329af60 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -10,6 +10,7 @@
 #include <linux/interrupt.h>
 #include <linux/pm_runtime.h>
 #include <linux/sizes.h>
+#include <linux/delay.h>
 
 #include "mei_dev.h"
 #include "hbm.h"
@@ -327,9 +328,12 @@ static void mei_me_intr_clear(struct mei_device *dev)
  */
 static void mei_me_intr_enable(struct mei_device *dev)
 {
-	u32 hcsr = mei_hcsr_read(dev);
+	u32 hcsr;
+
+	if (mei_me_hw_use_polling(to_me_hw(dev)))
+		return;
 
-	hcsr |= H_CSR_IE_MASK;
+	hcsr = mei_hcsr_read(dev) | H_CSR_IE_MASK;
 	mei_hcsr_set(dev, hcsr);
 }
 
@@ -354,6 +358,9 @@ static void mei_me_synchronize_irq(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
 
+	if (mei_me_hw_use_polling(hw))
+		return;
+
 	synchronize_irq(hw->irq);
 }
 
@@ -380,7 +387,10 @@ static void mei_me_host_set_ready(struct mei_device *dev)
 {
 	u32 hcsr = mei_hcsr_read(dev);
 
-	hcsr |= H_CSR_IE_MASK | H_IG | H_RDY;
+	if (!mei_me_hw_use_polling(to_me_hw(dev)))
+		hcsr |= H_CSR_IE_MASK;
+
+	hcsr |=  H_IG | H_RDY;
 	mei_hcsr_set(dev, hcsr);
 }
 
@@ -1174,7 +1184,7 @@ static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
 
 	hcsr |= H_RST | H_IG | H_CSR_IS_MASK;
 
-	if (!intr_enable)
+	if (!intr_enable || mei_me_hw_use_polling(to_me_hw(dev)))
 		hcsr &= ~H_CSR_IE_MASK;
 
 	dev->recvd_hw_ready = false;
@@ -1329,6 +1339,46 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
 }
 EXPORT_SYMBOL_GPL(mei_me_irq_thread_handler);
 
+#define MEI_POLLING_TIMEOUT_ACTIVE 100
+#define MEI_POLLING_TIMEOUT_IDLE   500
+
+int mei_me_polling_thread(void *_dev)
+{
+	struct mei_device *dev = _dev;
+	irqreturn_t irq_ret;
+	long polling_timeout = MEI_POLLING_TIMEOUT_ACTIVE;
+
+	dev_dbg(dev->dev, "kernel thread is running\n");
+	while (!kthread_should_stop()) {
+		struct mei_me_hw *hw = to_me_hw(dev);
+		u32 hcsr;
+
+		wait_event_timeout(hw->wait_active,
+				   hw->is_active || kthread_should_stop(),
+				   msecs_to_jiffies(MEI_POLLING_TIMEOUT_IDLE));
+
+		if (kthread_should_stop())
+			break;
+
+		hcsr = mei_hcsr_read(dev);
+		if (me_intr_src(hcsr)) {
+			polling_timeout = MEI_POLLING_TIMEOUT_ACTIVE;
+			irq_ret = mei_me_irq_thread_handler(1, dev);
+			if (irq_ret != IRQ_HANDLED)
+				dev_err(dev->dev, "irq_ret %d\n", irq_ret);
+		} else {
+			polling_timeout = clamp_val(polling_timeout + MEI_POLLING_TIMEOUT_ACTIVE,
+						    MEI_POLLING_TIMEOUT_ACTIVE,
+						    MEI_POLLING_TIMEOUT_IDLE);
+		}
+
+		schedule_timeout_interruptible(msecs_to_jiffies(polling_timeout));
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mei_me_polling_thread);
+
 static const struct mei_hw_ops mei_me_hw_ops = {
 
 	.trc_status = mei_me_trc_status,
diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h
index a071c645e905..ca09274ac299 100644
--- a/drivers/misc/mei/hw-me.h
+++ b/drivers/misc/mei/hw-me.h
@@ -51,6 +51,8 @@ struct mei_cfg {
  * @d0i3_supported: di03 support
  * @hbuf_depth: depth of hardware host/write buffer in slots
  * @read_fws: read FW status register handler
+ * @wait_active: the polling thread activity wait queue
+ * @is_active: the device is active
  */
 struct mei_me_hw {
 	const struct mei_cfg *cfg;
@@ -60,10 +62,19 @@ struct mei_me_hw {
 	bool d0i3_supported;
 	u8 hbuf_depth;
 	int (*read_fws)(const struct mei_device *dev, int where, u32 *val);
+	/* polling */
+	struct task_struct *polling_thread;
+	wait_queue_head_t wait_active;
+	bool is_active;
 };
 
 #define to_me_hw(dev) (struct mei_me_hw *)((dev)->hw)
 
+static inline bool mei_me_hw_use_polling(const struct mei_me_hw *hw)
+{
+	return hw->irq < 0;
+}
+
 /**
  * enum mei_cfg_idx - indices to platform specific configurations.
  *
@@ -127,5 +138,6 @@ int mei_me_pg_exit_sync(struct mei_device *dev);
 
 irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id);
 irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id);
+int mei_me_polling_thread(void *_dev);
 
 #endif /* _MEI_INTERFACE_H_ */
-- 
2.32.0

[PATCH 11/20] mei: gsc: use polling instead of interrupts

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

A work-around for a HW issue in XEHPSDV that manifests itself when SW reads
a gsc register when gsc is sending an interrupt. The work-around is
to disable interrupts and to use polling instead.

Cc: James Ausmus <james.ausmus@intel.com>
Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/gsc-me.c | 48 ++++++++++++++++++++++++++------
 drivers/misc/mei/hw-me.c  | 58 ++++++++++++++++++++++++++++++++++++---
 drivers/misc/mei/hw-me.h  | 12 ++++++++
 3 files changed, 105 insertions(+), 13 deletions(-)

diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index 32ea75f5e7aa..6f262ddfd25a 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -13,6 +13,7 @@
 #include <linux/ktime.h>
 #include <linux/delay.h>
 #include <linux/pm_runtime.h>
+#include <linux/kthread.h>
 
 #include "mei_dev.h"
 #include "hw-me.h"
@@ -66,13 +67,28 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
 
 	dev_set_drvdata(device, dev);
 
-	ret = devm_request_threaded_irq(device, hw->irq,
-					mei_me_irq_quick_handler,
-					mei_me_irq_thread_handler,
-					IRQF_ONESHOT, KBUILD_MODNAME, dev);
-	if (ret) {
-		dev_err(device, "irq register failed %d\n", ret);
-		goto err;
+	/* use polling */
+	if (mei_me_hw_use_polling(hw)) {
+		mei_disable_interrupts(dev);
+		mei_clear_interrupts(dev);
+		init_waitqueue_head(&hw->wait_active);
+		hw->is_active = true; /* start in active mode for initialization */
+		hw->polling_thread = kthread_run(mei_me_polling_thread, dev,
+						 "kmegscirqd/%s", dev_name(device));
+		if (IS_ERR(hw->polling_thread)) {
+			ret = PTR_ERR(hw->polling_thread);
+			dev_err(device, "unable to create kernel thread: %d\n", ret);
+			goto err;
+		}
+	} else {
+		ret = devm_request_threaded_irq(device, hw->irq,
+						mei_me_irq_quick_handler,
+						mei_me_irq_thread_handler,
+						IRQF_ONESHOT, KBUILD_MODNAME, dev);
+		if (ret) {
+			dev_err(device, "irq register failed %d\n", ret);
+			goto err;
+		}
 	}
 
 	pm_runtime_get_noresume(device);
@@ -98,7 +114,8 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
 
 register_err:
 	mei_stop(dev);
-	devm_free_irq(device, hw->irq, dev);
+	if (!mei_me_hw_use_polling(hw))
+		devm_free_irq(device, hw->irq, dev);
 
 err:
 	dev_err(device, "probe failed: %d\n", ret);
@@ -119,12 +136,17 @@ static void mei_gsc_remove(struct auxiliary_device *aux_dev)
 
 	mei_stop(dev);
 
+	hw = to_me_hw(dev);
+	if (mei_me_hw_use_polling(hw))
+		kthread_stop(hw->polling_thread);
+
 	mei_deregister(dev);
 
 	pm_runtime_disable(&aux_dev->dev);
 
 	mei_disable_interrupts(dev);
-	devm_free_irq(&aux_dev->dev, hw->irq, dev);
+	if (!mei_me_hw_use_polling(hw))
+		devm_free_irq(&aux_dev->dev, hw->irq, dev);
 }
 
 static int __maybe_unused mei_gsc_pm_suspend(struct device *device)
@@ -185,6 +207,9 @@ static int  __maybe_unused mei_gsc_pm_runtime_suspend(struct device *device)
 	if (mei_write_is_idle(dev)) {
 		hw = to_me_hw(dev);
 		hw->pg_state = MEI_PG_ON;
+
+		if (mei_me_hw_use_polling(hw))
+			hw->is_active = false;
 		ret = 0;
 	} else {
 		ret = -EAGAIN;
@@ -209,6 +234,11 @@ static int __maybe_unused mei_gsc_pm_runtime_resume(struct device *device)
 	hw = to_me_hw(dev);
 	hw->pg_state = MEI_PG_OFF;
 
+	if (mei_me_hw_use_polling(hw)) {
+		hw->is_active = true;
+		wake_up(&hw->wait_active);
+	}
+
 	mutex_unlock(&dev->device_lock);
 
 	irq_ret = mei_me_irq_thread_handler(1, dev);
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 9870bf717979..959b3329af60 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -10,6 +10,7 @@
 #include <linux/interrupt.h>
 #include <linux/pm_runtime.h>
 #include <linux/sizes.h>
+#include <linux/delay.h>
 
 #include "mei_dev.h"
 #include "hbm.h"
@@ -327,9 +328,12 @@ static void mei_me_intr_clear(struct mei_device *dev)
  */
 static void mei_me_intr_enable(struct mei_device *dev)
 {
-	u32 hcsr = mei_hcsr_read(dev);
+	u32 hcsr;
+
+	if (mei_me_hw_use_polling(to_me_hw(dev)))
+		return;
 
-	hcsr |= H_CSR_IE_MASK;
+	hcsr = mei_hcsr_read(dev) | H_CSR_IE_MASK;
 	mei_hcsr_set(dev, hcsr);
 }
 
@@ -354,6 +358,9 @@ static void mei_me_synchronize_irq(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
 
+	if (mei_me_hw_use_polling(hw))
+		return;
+
 	synchronize_irq(hw->irq);
 }
 
@@ -380,7 +387,10 @@ static void mei_me_host_set_ready(struct mei_device *dev)
 {
 	u32 hcsr = mei_hcsr_read(dev);
 
-	hcsr |= H_CSR_IE_MASK | H_IG | H_RDY;
+	if (!mei_me_hw_use_polling(to_me_hw(dev)))
+		hcsr |= H_CSR_IE_MASK;
+
+	hcsr |=  H_IG | H_RDY;
 	mei_hcsr_set(dev, hcsr);
 }
 
@@ -1174,7 +1184,7 @@ static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
 
 	hcsr |= H_RST | H_IG | H_CSR_IS_MASK;
 
-	if (!intr_enable)
+	if (!intr_enable || mei_me_hw_use_polling(to_me_hw(dev)))
 		hcsr &= ~H_CSR_IE_MASK;
 
 	dev->recvd_hw_ready = false;
@@ -1329,6 +1339,46 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
 }
 EXPORT_SYMBOL_GPL(mei_me_irq_thread_handler);
 
+#define MEI_POLLING_TIMEOUT_ACTIVE 100
+#define MEI_POLLING_TIMEOUT_IDLE   500
+
+int mei_me_polling_thread(void *_dev)
+{
+	struct mei_device *dev = _dev;
+	irqreturn_t irq_ret;
+	long polling_timeout = MEI_POLLING_TIMEOUT_ACTIVE;
+
+	dev_dbg(dev->dev, "kernel thread is running\n");
+	while (!kthread_should_stop()) {
+		struct mei_me_hw *hw = to_me_hw(dev);
+		u32 hcsr;
+
+		wait_event_timeout(hw->wait_active,
+				   hw->is_active || kthread_should_stop(),
+				   msecs_to_jiffies(MEI_POLLING_TIMEOUT_IDLE));
+
+		if (kthread_should_stop())
+			break;
+
+		hcsr = mei_hcsr_read(dev);
+		if (me_intr_src(hcsr)) {
+			polling_timeout = MEI_POLLING_TIMEOUT_ACTIVE;
+			irq_ret = mei_me_irq_thread_handler(1, dev);
+			if (irq_ret != IRQ_HANDLED)
+				dev_err(dev->dev, "irq_ret %d\n", irq_ret);
+		} else {
+			polling_timeout = clamp_val(polling_timeout + MEI_POLLING_TIMEOUT_ACTIVE,
+						    MEI_POLLING_TIMEOUT_ACTIVE,
+						    MEI_POLLING_TIMEOUT_IDLE);
+		}
+
+		schedule_timeout_interruptible(msecs_to_jiffies(polling_timeout));
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(mei_me_polling_thread);
+
 static const struct mei_hw_ops mei_me_hw_ops = {
 
 	.trc_status = mei_me_trc_status,
diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h
index a071c645e905..ca09274ac299 100644
--- a/drivers/misc/mei/hw-me.h
+++ b/drivers/misc/mei/hw-me.h
@@ -51,6 +51,8 @@ struct mei_cfg {
  * @d0i3_supported: di03 support
  * @hbuf_depth: depth of hardware host/write buffer in slots
  * @read_fws: read FW status register handler
+ * @wait_active: the polling thread activity wait queue
+ * @is_active: the device is active
  */
 struct mei_me_hw {
 	const struct mei_cfg *cfg;
@@ -60,10 +62,19 @@ struct mei_me_hw {
 	bool d0i3_supported;
 	u8 hbuf_depth;
 	int (*read_fws)(const struct mei_device *dev, int where, u32 *val);
+	/* polling */
+	struct task_struct *polling_thread;
+	wait_queue_head_t wait_active;
+	bool is_active;
 };
 
 #define to_me_hw(dev) (struct mei_me_hw *)((dev)->hw)
 
+static inline bool mei_me_hw_use_polling(const struct mei_me_hw *hw)
+{
+	return hw->irq < 0;
+}
+
 /**
  * enum mei_cfg_idx - indices to platform specific configurations.
  *
@@ -127,5 +138,6 @@ int mei_me_pg_exit_sync(struct mei_device *dev);
 
 irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id);
 irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id);
+int mei_me_polling_thread(void *_dev);
 
 #endif /* _MEI_INTERFACE_H_ */
-- 
2.32.0

[Intel-gfx] [PATCH 12/20] mei: gsc: wait for reset thread on stop

[Alexander Usyskin]

Wait for reset work to complete before initiating
stop reset flow sequence.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/init.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index eb052005ca86..5bb6ba662cc0 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -320,6 +320,8 @@ void mei_stop(struct mei_device *dev)
 
 	mei_clear_interrupts(dev);
 	mei_synchronize_irq(dev);
+	/* to catch HW-initiated reset */
+	mei_cancel_work(dev);
 
 	mutex_lock(&dev->device_lock);
 
-- 
2.32.0

[PATCH 12/20] mei: gsc: wait for reset thread on stop

[Alexander Usyskin]

Wait for reset work to complete before initiating
stop reset flow sequence.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/init.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index eb052005ca86..5bb6ba662cc0 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -320,6 +320,8 @@ void mei_stop(struct mei_device *dev)
 
 	mei_clear_interrupts(dev);
 	mei_synchronize_irq(dev);
+	/* to catch HW-initiated reset */
+	mei_cancel_work(dev);
 
 	mutex_lock(&dev->device_lock);
 
-- 
2.32.0

[Intel-gfx] [PATCH 13/20] mei: extend timeouts on slow devices.

[Alexander Usyskin]

Parametrize operational timeouts in order
to support slow firmware on some graphic devices.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/bus-fixup.c |  3 +--
 drivers/misc/mei/client.c    | 14 +++++++-------
 drivers/misc/mei/gsc-me.c    |  2 +-
 drivers/misc/mei/hbm.c       | 12 ++++++------
 drivers/misc/mei/hw-me.c     | 30 ++++++++++++++++--------------
 drivers/misc/mei/hw-me.h     |  2 +-
 drivers/misc/mei/hw-txe.c    |  2 +-
 drivers/misc/mei/hw.h        |  5 +++++
 drivers/misc/mei/init.c      | 19 ++++++++++++++++++-
 drivers/misc/mei/main.c      |  2 +-
 drivers/misc/mei/mei_dev.h   | 16 ++++++++++++++++
 drivers/misc/mei/pci-me.c    |  2 +-
 12 files changed, 74 insertions(+), 35 deletions(-)

diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
index 59506ba6fc48..24e91a9ea558 100644
--- a/drivers/misc/mei/bus-fixup.c
+++ b/drivers/misc/mei/bus-fixup.c
@@ -164,7 +164,6 @@ static int mei_osver(struct mei_cl_device *cldev)
 			    sizeof(struct mkhi_fw_ver))
 #define MKHI_FWVER_LEN(__num) (sizeof(struct mkhi_msg_hdr) + \
 			       sizeof(struct mkhi_fw_ver_block) * (__num))
-#define MKHI_RCV_TIMEOUT 500 /* receive timeout in msec */
 static int mei_fwver(struct mei_cl_device *cldev)
 {
 	char buf[MKHI_FWVER_BUF_LEN];
@@ -187,7 +186,7 @@ static int mei_fwver(struct mei_cl_device *cldev)
 
 	ret = 0;
 	bytes_recv = __mei_cl_recv(cldev->cl, buf, sizeof(buf), NULL, 0,
-				   MKHI_RCV_TIMEOUT);
+				   cldev->bus->timeouts.mkhi_recv);
 	if (bytes_recv < 0 || (size_t)bytes_recv < MKHI_FWVER_LEN(1)) {
 		/*
 		 * Should be at least one version block,
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 31264ab2eb13..e7a16d9b2241 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -870,7 +870,7 @@ static int mei_cl_send_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb)
 	}
 
 	list_move_tail(&cb->list, &dev->ctrl_rd_list);
-	cl->timer_count = MEI_CONNECT_TIMEOUT;
+	cl->timer_count = dev->timeouts.connect;
 	mei_schedule_stall_timer(dev);
 
 	return 0;
@@ -945,7 +945,7 @@ static int __mei_cl_disconnect(struct mei_cl *cl)
 	wait_event_timeout(cl->wait,
 			   cl->state == MEI_FILE_DISCONNECT_REPLY ||
 			   cl->state == MEI_FILE_DISCONNECTED,
-			   mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+			   dev->timeouts.cl_connect);
 	mutex_lock(&dev->device_lock);
 
 	rets = cl->status;
@@ -1065,7 +1065,7 @@ static int mei_cl_send_connect(struct mei_cl *cl, struct mei_cl_cb *cb)
 	}
 
 	list_move_tail(&cb->list, &dev->ctrl_rd_list);
-	cl->timer_count = MEI_CONNECT_TIMEOUT;
+	cl->timer_count = dev->timeouts.connect;
 	mei_schedule_stall_timer(dev);
 	return 0;
 }
@@ -1164,7 +1164,7 @@ int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl,
 			 cl->state == MEI_FILE_DISCONNECTED ||
 			 cl->state == MEI_FILE_DISCONNECT_REQUIRED ||
 			 cl->state == MEI_FILE_DISCONNECT_REPLY),
-			mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+			dev->timeouts.cl_connect);
 	mutex_lock(&dev->device_lock);
 
 	if (!mei_cl_is_connected(cl)) {
@@ -1562,7 +1562,7 @@ int mei_cl_notify_request(struct mei_cl *cl,
 			   cl->notify_en == request ||
 			   cl->status ||
 			   !mei_cl_is_connected(cl),
-			   mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+			   dev->timeouts.cl_connect);
 	mutex_lock(&dev->device_lock);
 
 	if (cl->notify_en != request && !cl->status)
@@ -2336,7 +2336,7 @@ int mei_cl_dma_alloc_and_map(struct mei_cl *cl, const struct file *fp,
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(cl->wait,
 			   cl->dma_mapped || cl->status,
-			   mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+			   dev->timeouts.cl_connect);
 	mutex_lock(&dev->device_lock);
 
 	if (!cl->dma_mapped && !cl->status)
@@ -2415,7 +2415,7 @@ int mei_cl_dma_unmap(struct mei_cl *cl, const struct file *fp)
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(cl->wait,
 			   !cl->dma_mapped || cl->status,
-			   mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+			   dev->timeouts.cl_connect);
 	mutex_lock(&dev->device_lock);
 
 	if (cl->dma_mapped && !cl->status)
diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index 6f262ddfd25a..38d035ae2904 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -48,7 +48,7 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
 
 	device = &aux_dev->dev;
 
-	dev = mei_me_dev_init(device, cfg);
+	dev = mei_me_dev_init(device, cfg, adev->slow_fw);
 	if (IS_ERR(dev)) {
 		ret = PTR_ERR(dev);
 		goto err;
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index cebcca6d6d3e..4ff4dbfd07c0 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -232,7 +232,7 @@ int mei_hbm_start_wait(struct mei_device *dev)
 	mutex_unlock(&dev->device_lock);
 	ret = wait_event_timeout(dev->wait_hbm_start,
 			dev->hbm_state != MEI_HBM_STARTING,
-			mei_secs_to_jiffies(MEI_HBM_TIMEOUT));
+			dev->timeouts.hbm);
 	mutex_lock(&dev->device_lock);
 
 	if (ret == 0 && (dev->hbm_state <= MEI_HBM_STARTING)) {
@@ -275,7 +275,7 @@ int mei_hbm_start_req(struct mei_device *dev)
 	}
 
 	dev->hbm_state = MEI_HBM_STARTING;
-	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+	dev->init_clients_timer = dev->timeouts.client_init;
 	mei_schedule_stall_timer(dev);
 	return 0;
 }
@@ -316,7 +316,7 @@ static int mei_hbm_dma_setup_req(struct mei_device *dev)
 	}
 
 	dev->hbm_state = MEI_HBM_DR_SETUP;
-	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+	dev->init_clients_timer = dev->timeouts.client_init;
 	mei_schedule_stall_timer(dev);
 	return 0;
 }
@@ -351,7 +351,7 @@ static int mei_hbm_capabilities_req(struct mei_device *dev)
 	}
 
 	dev->hbm_state = MEI_HBM_CAP_SETUP;
-	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+	dev->init_clients_timer = dev->timeouts.client_init;
 	mei_schedule_stall_timer(dev);
 	return 0;
 }
@@ -385,7 +385,7 @@ static int mei_hbm_enum_clients_req(struct mei_device *dev)
 		return ret;
 	}
 	dev->hbm_state = MEI_HBM_ENUM_CLIENTS;
-	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+	dev->init_clients_timer = dev->timeouts.client_init;
 	mei_schedule_stall_timer(dev);
 	return 0;
 }
@@ -751,7 +751,7 @@ static int mei_hbm_prop_req(struct mei_device *dev, unsigned long start_idx)
 		return ret;
 	}
 
-	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+	dev->init_clients_timer = dev->timeouts.client_init;
 	mei_schedule_stall_timer(dev);
 
 	return 0;
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 959b3329af60..93d8b6dcedda 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -445,7 +445,7 @@ static int mei_me_hw_ready_wait(struct mei_device *dev)
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(dev->wait_hw_ready,
 			dev->recvd_hw_ready,
-			mei_secs_to_jiffies(MEI_HW_READY_TIMEOUT));
+			dev->timeouts.hw_ready);
 	mutex_lock(&dev->device_lock);
 	if (!dev->recvd_hw_ready) {
 		dev_err(dev->dev, "wait hw ready failed\n");
@@ -707,7 +707,6 @@ static void mei_me_pg_unset(struct mei_device *dev)
 static int mei_me_pg_legacy_enter_sync(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
-	unsigned long timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
 	int ret;
 
 	dev->pg_event = MEI_PG_EVENT_WAIT;
@@ -718,7 +717,8 @@ static int mei_me_pg_legacy_enter_sync(struct mei_device *dev)
 
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(dev->wait_pg,
-		dev->pg_event == MEI_PG_EVENT_RECEIVED, timeout);
+		dev->pg_event == MEI_PG_EVENT_RECEIVED,
+		dev->timeouts.pgi);
 	mutex_lock(&dev->device_lock);
 
 	if (dev->pg_event == MEI_PG_EVENT_RECEIVED) {
@@ -744,7 +744,6 @@ static int mei_me_pg_legacy_enter_sync(struct mei_device *dev)
 static int mei_me_pg_legacy_exit_sync(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
-	unsigned long timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
 	int ret;
 
 	if (dev->pg_event == MEI_PG_EVENT_RECEIVED)
@@ -756,7 +755,8 @@ static int mei_me_pg_legacy_exit_sync(struct mei_device *dev)
 
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(dev->wait_pg,
-		dev->pg_event == MEI_PG_EVENT_RECEIVED, timeout);
+		dev->pg_event == MEI_PG_EVENT_RECEIVED,
+		dev->timeouts.pgi);
 	mutex_lock(&dev->device_lock);
 
 reply:
@@ -772,7 +772,8 @@ static int mei_me_pg_legacy_exit_sync(struct mei_device *dev)
 
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(dev->wait_pg,
-		dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED, timeout);
+		dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED,
+		dev->timeouts.pgi);
 	mutex_lock(&dev->device_lock);
 
 	if (dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED)
@@ -887,8 +888,6 @@ static u32 mei_me_d0i3_unset(struct mei_device *dev)
 static int mei_me_d0i3_enter_sync(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
-	unsigned long d0i3_timeout = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT);
-	unsigned long pgi_timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
 	int ret;
 	u32 reg;
 
@@ -910,7 +909,8 @@ static int mei_me_d0i3_enter_sync(struct mei_device *dev)
 
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(dev->wait_pg,
-		dev->pg_event == MEI_PG_EVENT_RECEIVED, pgi_timeout);
+		dev->pg_event == MEI_PG_EVENT_RECEIVED,
+		dev->timeouts.pgi);
 	mutex_lock(&dev->device_lock);
 
 	if (dev->pg_event != MEI_PG_EVENT_RECEIVED) {
@@ -930,7 +930,8 @@ static int mei_me_d0i3_enter_sync(struct mei_device *dev)
 
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(dev->wait_pg,
-		dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED, d0i3_timeout);
+		dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED,
+		dev->timeouts.d0i3);
 	mutex_lock(&dev->device_lock);
 
 	if (dev->pg_event != MEI_PG_EVENT_INTR_RECEIVED) {
@@ -990,7 +991,6 @@ static int mei_me_d0i3_enter(struct mei_device *dev)
 static int mei_me_d0i3_exit_sync(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
-	unsigned long timeout = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT);
 	int ret;
 	u32 reg;
 
@@ -1013,7 +1013,8 @@ static int mei_me_d0i3_exit_sync(struct mei_device *dev)
 
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(dev->wait_pg,
-		dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED, timeout);
+		dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED,
+		dev->timeouts.pgi);
 	mutex_lock(&dev->device_lock);
 
 	if (dev->pg_event != MEI_PG_EVENT_INTR_RECEIVED) {
@@ -1684,11 +1685,12 @@ EXPORT_SYMBOL_GPL(mei_me_get_cfg);
  *
  * @parent: device associated with physical device (pci/platform)
  * @cfg: per device generation config
+ * @slow_fw: configure longer timeouts as FW is slow
  *
  * Return: The mei_device pointer on success, NULL on failure.
  */
 struct mei_device *mei_me_dev_init(struct device *parent,
-				   const struct mei_cfg *cfg)
+				   const struct mei_cfg *cfg, bool slow_fw)
 {
 	struct mei_device *dev;
 	struct mei_me_hw *hw;
@@ -1703,7 +1705,7 @@ struct mei_device *mei_me_dev_init(struct device *parent,
 	for (i = 0; i < DMA_DSCR_NUM; i++)
 		dev->dr_dscr[i].size = cfg->dma_size[i];
 
-	mei_device_init(dev, parent, &mei_me_hw_ops);
+	mei_device_init(dev, parent, slow_fw, &mei_me_hw_ops);
 	hw->cfg = cfg;
 
 	dev->fw_f_fw_ver_supported = cfg->fw_ver_supported;
diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h
index ca09274ac299..0e9d90808bcf 100644
--- a/drivers/misc/mei/hw-me.h
+++ b/drivers/misc/mei/hw-me.h
@@ -131,7 +131,7 @@ enum mei_cfg_idx {
 const struct mei_cfg *mei_me_get_cfg(kernel_ulong_t idx);
 
 struct mei_device *mei_me_dev_init(struct device *parent,
-				   const struct mei_cfg *cfg);
+				   const struct mei_cfg *cfg, bool slow_fw);
 
 int mei_me_pg_enter_sync(struct mei_device *dev);
 int mei_me_pg_exit_sync(struct mei_device *dev);
diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c
index 00652c137cc7..fccfa806bd63 100644
--- a/drivers/misc/mei/hw-txe.c
+++ b/drivers/misc/mei/hw-txe.c
@@ -1201,7 +1201,7 @@ struct mei_device *mei_txe_dev_init(struct pci_dev *pdev)
 	if (!dev)
 		return NULL;
 
-	mei_device_init(dev, &pdev->dev, &mei_txe_hw_ops);
+	mei_device_init(dev, &pdev->dev, false, &mei_txe_hw_ops);
 
 	hw = to_txe_hw(dev);
 
diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h
index b46077b17114..9381e5c13b4f 100644
--- a/drivers/misc/mei/hw.h
+++ b/drivers/misc/mei/hw.h
@@ -16,11 +16,16 @@
 #define MEI_CONNECT_TIMEOUT         3  /* HPS: at least 2 seconds */
 
 #define MEI_CL_CONNECT_TIMEOUT     15  /* HPS: Client Connect Timeout */
+#define MEI_CL_CONNECT_TIMEOUT_SLOW 30 /* HPS: Client Connect Timeout, slow FW */
 #define MEI_CLIENTS_INIT_TIMEOUT   15  /* HPS: Clients Enumeration Timeout */
 
 #define MEI_PGI_TIMEOUT             1  /* PG Isolation time response 1 sec */
 #define MEI_D0I3_TIMEOUT            5  /* D0i3 set/unset max response time */
 #define MEI_HBM_TIMEOUT             1  /* 1 second */
+#define MEI_HBM_TIMEOUT_SLOW        5  /* 5 second, slow FW */
+
+#define MKHI_RCV_TIMEOUT 500 /* receive timeout in msec */
+#define MKHI_RCV_TIMEOUT_SLOW 10000 /* receive timeout in msec, slow FW */
 
 /*
  * FW page size for DMA allocations
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index 5bb6ba662cc0..ce030a882d0c 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -359,14 +359,16 @@ bool mei_write_is_idle(struct mei_device *dev)
 EXPORT_SYMBOL_GPL(mei_write_is_idle);
 
 /**
- * mei_device_init  -- initialize mei_device structure
+ * mei_device_init - initialize mei_device structure
  *
  * @dev: the mei device
  * @device: the device structure
+ * @slow_fw: configure longer timeouts as FW is slow
  * @hw_ops: hw operations
  */
 void mei_device_init(struct mei_device *dev,
 		     struct device *device,
+		     bool slow_fw,
 		     const struct mei_hw_ops *hw_ops)
 {
 	/* setup our list array */
@@ -404,6 +406,21 @@ void mei_device_init(struct mei_device *dev,
 	dev->pg_event = MEI_PG_EVENT_IDLE;
 	dev->ops      = hw_ops;
 	dev->dev      = device;
+
+	dev->timeouts.hw_ready = mei_secs_to_jiffies(MEI_HW_READY_TIMEOUT);
+	dev->timeouts.connect = MEI_CONNECT_TIMEOUT;
+	dev->timeouts.client_init = MEI_CLIENTS_INIT_TIMEOUT;
+	dev->timeouts.pgi = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
+	dev->timeouts.d0i3 = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT);
+	if (slow_fw) {
+		dev->timeouts.cl_connect = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT_SLOW);
+		dev->timeouts.hbm = mei_secs_to_jiffies(MEI_HBM_TIMEOUT_SLOW);
+		dev->timeouts.mkhi_recv = msecs_to_jiffies(MKHI_RCV_TIMEOUT_SLOW);
+	} else {
+		dev->timeouts.cl_connect = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT);
+		dev->timeouts.hbm = mei_secs_to_jiffies(MEI_HBM_TIMEOUT);
+		dev->timeouts.mkhi_recv = msecs_to_jiffies(MKHI_RCV_TIMEOUT);
+	}
 }
 EXPORT_SYMBOL_GPL(mei_device_init);
 
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 786f7c8f7f61..261939b945ef 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -571,7 +571,7 @@ static int mei_ioctl_connect_vtag(struct file *file,
 				    cl->state == MEI_FILE_DISCONNECTED ||
 				    cl->state == MEI_FILE_DISCONNECT_REQUIRED ||
 				    cl->state == MEI_FILE_DISCONNECT_REPLY),
-				   mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+				   dev->timeouts.cl_connect);
 		mutex_lock(&dev->device_lock);
 	}
 
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 694f866f87ef..16f59b3a45fc 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -415,6 +415,17 @@ struct mei_fw_version {
 
 #define MEI_MAX_FW_VER_BLOCKS 3
 
+struct mei_dev_timeouts {
+	unsigned long hw_ready; /* Timeout on ready message, in jiffies */
+	int connect; /* HPS: at least 2 seconds, in seconds */
+	unsigned long cl_connect; /* HPS: Client Connect Timeout, in jiffies */
+	int client_init; /* HPS: Clients Enumeration Timeout, in seconds */
+	unsigned long pgi; /* PG Isolation time response, in jiffies */
+	unsigned int d0i3; /* D0i3 set/unset max response time, in jiffies */
+	unsigned long hbm; /* HBM operation timeout, in jiffies */
+	unsigned long mkhi_recv; /* receive timeout, in jiffies */
+};
+
 /**
  * struct mei_device -  MEI private device struct
  *
@@ -480,6 +491,8 @@ struct mei_fw_version {
  * @allow_fixed_address: allow user space to connect a fixed client
  * @override_fixed_address: force allow fixed address behavior
  *
+ * @timeouts: actual timeout values
+ *
  * @reset_work  : work item for the device reset
  * @bus_rescan_work : work item for the bus rescan
  *
@@ -568,6 +581,8 @@ struct mei_device {
 	bool allow_fixed_address;
 	bool override_fixed_address;
 
+	struct mei_dev_timeouts timeouts;
+
 	struct work_struct reset_work;
 	struct work_struct bus_rescan_work;
 
@@ -632,6 +647,7 @@ static inline u32 mei_slots2data(int slots)
  */
 void mei_device_init(struct mei_device *dev,
 		     struct device *device,
+		     bool slow_fw,
 		     const struct mei_hw_ops *hw_ops);
 int mei_reset(struct mei_device *dev);
 int mei_start(struct mei_device *dev);
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index 33e58821e478..0288784f8ffd 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -201,7 +201,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	}
 
 	/* allocates and initializes the mei dev structure */
-	dev = mei_me_dev_init(&pdev->dev, cfg);
+	dev = mei_me_dev_init(&pdev->dev, cfg, false);
 	if (!dev) {
 		err = -ENOMEM;
 		goto end;
-- 
2.32.0

[PATCH 13/20] mei: extend timeouts on slow devices.

[Alexander Usyskin]

Parametrize operational timeouts in order
to support slow firmware on some graphic devices.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/bus-fixup.c |  3 +--
 drivers/misc/mei/client.c    | 14 +++++++-------
 drivers/misc/mei/gsc-me.c    |  2 +-
 drivers/misc/mei/hbm.c       | 12 ++++++------
 drivers/misc/mei/hw-me.c     | 30 ++++++++++++++++--------------
 drivers/misc/mei/hw-me.h     |  2 +-
 drivers/misc/mei/hw-txe.c    |  2 +-
 drivers/misc/mei/hw.h        |  5 +++++
 drivers/misc/mei/init.c      | 19 ++++++++++++++++++-
 drivers/misc/mei/main.c      |  2 +-
 drivers/misc/mei/mei_dev.h   | 16 ++++++++++++++++
 drivers/misc/mei/pci-me.c    |  2 +-
 12 files changed, 74 insertions(+), 35 deletions(-)

diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
index 59506ba6fc48..24e91a9ea558 100644
--- a/drivers/misc/mei/bus-fixup.c
+++ b/drivers/misc/mei/bus-fixup.c
@@ -164,7 +164,6 @@ static int mei_osver(struct mei_cl_device *cldev)
 			    sizeof(struct mkhi_fw_ver))
 #define MKHI_FWVER_LEN(__num) (sizeof(struct mkhi_msg_hdr) + \
 			       sizeof(struct mkhi_fw_ver_block) * (__num))
-#define MKHI_RCV_TIMEOUT 500 /* receive timeout in msec */
 static int mei_fwver(struct mei_cl_device *cldev)
 {
 	char buf[MKHI_FWVER_BUF_LEN];
@@ -187,7 +186,7 @@ static int mei_fwver(struct mei_cl_device *cldev)
 
 	ret = 0;
 	bytes_recv = __mei_cl_recv(cldev->cl, buf, sizeof(buf), NULL, 0,
-				   MKHI_RCV_TIMEOUT);
+				   cldev->bus->timeouts.mkhi_recv);
 	if (bytes_recv < 0 || (size_t)bytes_recv < MKHI_FWVER_LEN(1)) {
 		/*
 		 * Should be at least one version block,
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 31264ab2eb13..e7a16d9b2241 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -870,7 +870,7 @@ static int mei_cl_send_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb)
 	}
 
 	list_move_tail(&cb->list, &dev->ctrl_rd_list);
-	cl->timer_count = MEI_CONNECT_TIMEOUT;
+	cl->timer_count = dev->timeouts.connect;
 	mei_schedule_stall_timer(dev);
 
 	return 0;
@@ -945,7 +945,7 @@ static int __mei_cl_disconnect(struct mei_cl *cl)
 	wait_event_timeout(cl->wait,
 			   cl->state == MEI_FILE_DISCONNECT_REPLY ||
 			   cl->state == MEI_FILE_DISCONNECTED,
-			   mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+			   dev->timeouts.cl_connect);
 	mutex_lock(&dev->device_lock);
 
 	rets = cl->status;
@@ -1065,7 +1065,7 @@ static int mei_cl_send_connect(struct mei_cl *cl, struct mei_cl_cb *cb)
 	}
 
 	list_move_tail(&cb->list, &dev->ctrl_rd_list);
-	cl->timer_count = MEI_CONNECT_TIMEOUT;
+	cl->timer_count = dev->timeouts.connect;
 	mei_schedule_stall_timer(dev);
 	return 0;
 }
@@ -1164,7 +1164,7 @@ int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl,
 			 cl->state == MEI_FILE_DISCONNECTED ||
 			 cl->state == MEI_FILE_DISCONNECT_REQUIRED ||
 			 cl->state == MEI_FILE_DISCONNECT_REPLY),
-			mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+			dev->timeouts.cl_connect);
 	mutex_lock(&dev->device_lock);
 
 	if (!mei_cl_is_connected(cl)) {
@@ -1562,7 +1562,7 @@ int mei_cl_notify_request(struct mei_cl *cl,
 			   cl->notify_en == request ||
 			   cl->status ||
 			   !mei_cl_is_connected(cl),
-			   mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+			   dev->timeouts.cl_connect);
 	mutex_lock(&dev->device_lock);
 
 	if (cl->notify_en != request && !cl->status)
@@ -2336,7 +2336,7 @@ int mei_cl_dma_alloc_and_map(struct mei_cl *cl, const struct file *fp,
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(cl->wait,
 			   cl->dma_mapped || cl->status,
-			   mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+			   dev->timeouts.cl_connect);
 	mutex_lock(&dev->device_lock);
 
 	if (!cl->dma_mapped && !cl->status)
@@ -2415,7 +2415,7 @@ int mei_cl_dma_unmap(struct mei_cl *cl, const struct file *fp)
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(cl->wait,
 			   !cl->dma_mapped || cl->status,
-			   mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+			   dev->timeouts.cl_connect);
 	mutex_lock(&dev->device_lock);
 
 	if (cl->dma_mapped && !cl->status)
diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index 6f262ddfd25a..38d035ae2904 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -48,7 +48,7 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
 
 	device = &aux_dev->dev;
 
-	dev = mei_me_dev_init(device, cfg);
+	dev = mei_me_dev_init(device, cfg, adev->slow_fw);
 	if (IS_ERR(dev)) {
 		ret = PTR_ERR(dev);
 		goto err;
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index cebcca6d6d3e..4ff4dbfd07c0 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -232,7 +232,7 @@ int mei_hbm_start_wait(struct mei_device *dev)
 	mutex_unlock(&dev->device_lock);
 	ret = wait_event_timeout(dev->wait_hbm_start,
 			dev->hbm_state != MEI_HBM_STARTING,
-			mei_secs_to_jiffies(MEI_HBM_TIMEOUT));
+			dev->timeouts.hbm);
 	mutex_lock(&dev->device_lock);
 
 	if (ret == 0 && (dev->hbm_state <= MEI_HBM_STARTING)) {
@@ -275,7 +275,7 @@ int mei_hbm_start_req(struct mei_device *dev)
 	}
 
 	dev->hbm_state = MEI_HBM_STARTING;
-	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+	dev->init_clients_timer = dev->timeouts.client_init;
 	mei_schedule_stall_timer(dev);
 	return 0;
 }
@@ -316,7 +316,7 @@ static int mei_hbm_dma_setup_req(struct mei_device *dev)
 	}
 
 	dev->hbm_state = MEI_HBM_DR_SETUP;
-	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+	dev->init_clients_timer = dev->timeouts.client_init;
 	mei_schedule_stall_timer(dev);
 	return 0;
 }
@@ -351,7 +351,7 @@ static int mei_hbm_capabilities_req(struct mei_device *dev)
 	}
 
 	dev->hbm_state = MEI_HBM_CAP_SETUP;
-	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+	dev->init_clients_timer = dev->timeouts.client_init;
 	mei_schedule_stall_timer(dev);
 	return 0;
 }
@@ -385,7 +385,7 @@ static int mei_hbm_enum_clients_req(struct mei_device *dev)
 		return ret;
 	}
 	dev->hbm_state = MEI_HBM_ENUM_CLIENTS;
-	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+	dev->init_clients_timer = dev->timeouts.client_init;
 	mei_schedule_stall_timer(dev);
 	return 0;
 }
@@ -751,7 +751,7 @@ static int mei_hbm_prop_req(struct mei_device *dev, unsigned long start_idx)
 		return ret;
 	}
 
-	dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
+	dev->init_clients_timer = dev->timeouts.client_init;
 	mei_schedule_stall_timer(dev);
 
 	return 0;
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 959b3329af60..93d8b6dcedda 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -445,7 +445,7 @@ static int mei_me_hw_ready_wait(struct mei_device *dev)
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(dev->wait_hw_ready,
 			dev->recvd_hw_ready,
-			mei_secs_to_jiffies(MEI_HW_READY_TIMEOUT));
+			dev->timeouts.hw_ready);
 	mutex_lock(&dev->device_lock);
 	if (!dev->recvd_hw_ready) {
 		dev_err(dev->dev, "wait hw ready failed\n");
@@ -707,7 +707,6 @@ static void mei_me_pg_unset(struct mei_device *dev)
 static int mei_me_pg_legacy_enter_sync(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
-	unsigned long timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
 	int ret;
 
 	dev->pg_event = MEI_PG_EVENT_WAIT;
@@ -718,7 +717,8 @@ static int mei_me_pg_legacy_enter_sync(struct mei_device *dev)
 
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(dev->wait_pg,
-		dev->pg_event == MEI_PG_EVENT_RECEIVED, timeout);
+		dev->pg_event == MEI_PG_EVENT_RECEIVED,
+		dev->timeouts.pgi);
 	mutex_lock(&dev->device_lock);
 
 	if (dev->pg_event == MEI_PG_EVENT_RECEIVED) {
@@ -744,7 +744,6 @@ static int mei_me_pg_legacy_enter_sync(struct mei_device *dev)
 static int mei_me_pg_legacy_exit_sync(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
-	unsigned long timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
 	int ret;
 
 	if (dev->pg_event == MEI_PG_EVENT_RECEIVED)
@@ -756,7 +755,8 @@ static int mei_me_pg_legacy_exit_sync(struct mei_device *dev)
 
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(dev->wait_pg,
-		dev->pg_event == MEI_PG_EVENT_RECEIVED, timeout);
+		dev->pg_event == MEI_PG_EVENT_RECEIVED,
+		dev->timeouts.pgi);
 	mutex_lock(&dev->device_lock);
 
 reply:
@@ -772,7 +772,8 @@ static int mei_me_pg_legacy_exit_sync(struct mei_device *dev)
 
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(dev->wait_pg,
-		dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED, timeout);
+		dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED,
+		dev->timeouts.pgi);
 	mutex_lock(&dev->device_lock);
 
 	if (dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED)
@@ -887,8 +888,6 @@ static u32 mei_me_d0i3_unset(struct mei_device *dev)
 static int mei_me_d0i3_enter_sync(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
-	unsigned long d0i3_timeout = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT);
-	unsigned long pgi_timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
 	int ret;
 	u32 reg;
 
@@ -910,7 +909,8 @@ static int mei_me_d0i3_enter_sync(struct mei_device *dev)
 
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(dev->wait_pg,
-		dev->pg_event == MEI_PG_EVENT_RECEIVED, pgi_timeout);
+		dev->pg_event == MEI_PG_EVENT_RECEIVED,
+		dev->timeouts.pgi);
 	mutex_lock(&dev->device_lock);
 
 	if (dev->pg_event != MEI_PG_EVENT_RECEIVED) {
@@ -930,7 +930,8 @@ static int mei_me_d0i3_enter_sync(struct mei_device *dev)
 
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(dev->wait_pg,
-		dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED, d0i3_timeout);
+		dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED,
+		dev->timeouts.d0i3);
 	mutex_lock(&dev->device_lock);
 
 	if (dev->pg_event != MEI_PG_EVENT_INTR_RECEIVED) {
@@ -990,7 +991,6 @@ static int mei_me_d0i3_enter(struct mei_device *dev)
 static int mei_me_d0i3_exit_sync(struct mei_device *dev)
 {
 	struct mei_me_hw *hw = to_me_hw(dev);
-	unsigned long timeout = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT);
 	int ret;
 	u32 reg;
 
@@ -1013,7 +1013,8 @@ static int mei_me_d0i3_exit_sync(struct mei_device *dev)
 
 	mutex_unlock(&dev->device_lock);
 	wait_event_timeout(dev->wait_pg,
-		dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED, timeout);
+		dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED,
+		dev->timeouts.pgi);
 	mutex_lock(&dev->device_lock);
 
 	if (dev->pg_event != MEI_PG_EVENT_INTR_RECEIVED) {
@@ -1684,11 +1685,12 @@ EXPORT_SYMBOL_GPL(mei_me_get_cfg);
  *
  * @parent: device associated with physical device (pci/platform)
  * @cfg: per device generation config
+ * @slow_fw: configure longer timeouts as FW is slow
  *
  * Return: The mei_device pointer on success, NULL on failure.
  */
 struct mei_device *mei_me_dev_init(struct device *parent,
-				   const struct mei_cfg *cfg)
+				   const struct mei_cfg *cfg, bool slow_fw)
 {
 	struct mei_device *dev;
 	struct mei_me_hw *hw;
@@ -1703,7 +1705,7 @@ struct mei_device *mei_me_dev_init(struct device *parent,
 	for (i = 0; i < DMA_DSCR_NUM; i++)
 		dev->dr_dscr[i].size = cfg->dma_size[i];
 
-	mei_device_init(dev, parent, &mei_me_hw_ops);
+	mei_device_init(dev, parent, slow_fw, &mei_me_hw_ops);
 	hw->cfg = cfg;
 
 	dev->fw_f_fw_ver_supported = cfg->fw_ver_supported;
diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h
index ca09274ac299..0e9d90808bcf 100644
--- a/drivers/misc/mei/hw-me.h
+++ b/drivers/misc/mei/hw-me.h
@@ -131,7 +131,7 @@ enum mei_cfg_idx {
 const struct mei_cfg *mei_me_get_cfg(kernel_ulong_t idx);
 
 struct mei_device *mei_me_dev_init(struct device *parent,
-				   const struct mei_cfg *cfg);
+				   const struct mei_cfg *cfg, bool slow_fw);
 
 int mei_me_pg_enter_sync(struct mei_device *dev);
 int mei_me_pg_exit_sync(struct mei_device *dev);
diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c
index 00652c137cc7..fccfa806bd63 100644
--- a/drivers/misc/mei/hw-txe.c
+++ b/drivers/misc/mei/hw-txe.c
@@ -1201,7 +1201,7 @@ struct mei_device *mei_txe_dev_init(struct pci_dev *pdev)
 	if (!dev)
 		return NULL;
 
-	mei_device_init(dev, &pdev->dev, &mei_txe_hw_ops);
+	mei_device_init(dev, &pdev->dev, false, &mei_txe_hw_ops);
 
 	hw = to_txe_hw(dev);
 
diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h
index b46077b17114..9381e5c13b4f 100644
--- a/drivers/misc/mei/hw.h
+++ b/drivers/misc/mei/hw.h
@@ -16,11 +16,16 @@
 #define MEI_CONNECT_TIMEOUT         3  /* HPS: at least 2 seconds */
 
 #define MEI_CL_CONNECT_TIMEOUT     15  /* HPS: Client Connect Timeout */
+#define MEI_CL_CONNECT_TIMEOUT_SLOW 30 /* HPS: Client Connect Timeout, slow FW */
 #define MEI_CLIENTS_INIT_TIMEOUT   15  /* HPS: Clients Enumeration Timeout */
 
 #define MEI_PGI_TIMEOUT             1  /* PG Isolation time response 1 sec */
 #define MEI_D0I3_TIMEOUT            5  /* D0i3 set/unset max response time */
 #define MEI_HBM_TIMEOUT             1  /* 1 second */
+#define MEI_HBM_TIMEOUT_SLOW        5  /* 5 second, slow FW */
+
+#define MKHI_RCV_TIMEOUT 500 /* receive timeout in msec */
+#define MKHI_RCV_TIMEOUT_SLOW 10000 /* receive timeout in msec, slow FW */
 
 /*
  * FW page size for DMA allocations
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index 5bb6ba662cc0..ce030a882d0c 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -359,14 +359,16 @@ bool mei_write_is_idle(struct mei_device *dev)
 EXPORT_SYMBOL_GPL(mei_write_is_idle);
 
 /**
- * mei_device_init  -- initialize mei_device structure
+ * mei_device_init - initialize mei_device structure
  *
  * @dev: the mei device
  * @device: the device structure
+ * @slow_fw: configure longer timeouts as FW is slow
  * @hw_ops: hw operations
  */
 void mei_device_init(struct mei_device *dev,
 		     struct device *device,
+		     bool slow_fw,
 		     const struct mei_hw_ops *hw_ops)
 {
 	/* setup our list array */
@@ -404,6 +406,21 @@ void mei_device_init(struct mei_device *dev,
 	dev->pg_event = MEI_PG_EVENT_IDLE;
 	dev->ops      = hw_ops;
 	dev->dev      = device;
+
+	dev->timeouts.hw_ready = mei_secs_to_jiffies(MEI_HW_READY_TIMEOUT);
+	dev->timeouts.connect = MEI_CONNECT_TIMEOUT;
+	dev->timeouts.client_init = MEI_CLIENTS_INIT_TIMEOUT;
+	dev->timeouts.pgi = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
+	dev->timeouts.d0i3 = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT);
+	if (slow_fw) {
+		dev->timeouts.cl_connect = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT_SLOW);
+		dev->timeouts.hbm = mei_secs_to_jiffies(MEI_HBM_TIMEOUT_SLOW);
+		dev->timeouts.mkhi_recv = msecs_to_jiffies(MKHI_RCV_TIMEOUT_SLOW);
+	} else {
+		dev->timeouts.cl_connect = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT);
+		dev->timeouts.hbm = mei_secs_to_jiffies(MEI_HBM_TIMEOUT);
+		dev->timeouts.mkhi_recv = msecs_to_jiffies(MKHI_RCV_TIMEOUT);
+	}
 }
 EXPORT_SYMBOL_GPL(mei_device_init);
 
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 786f7c8f7f61..261939b945ef 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -571,7 +571,7 @@ static int mei_ioctl_connect_vtag(struct file *file,
 				    cl->state == MEI_FILE_DISCONNECTED ||
 				    cl->state == MEI_FILE_DISCONNECT_REQUIRED ||
 				    cl->state == MEI_FILE_DISCONNECT_REPLY),
-				   mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+				   dev->timeouts.cl_connect);
 		mutex_lock(&dev->device_lock);
 	}
 
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 694f866f87ef..16f59b3a45fc 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -415,6 +415,17 @@ struct mei_fw_version {
 
 #define MEI_MAX_FW_VER_BLOCKS 3
 
+struct mei_dev_timeouts {
+	unsigned long hw_ready; /* Timeout on ready message, in jiffies */
+	int connect; /* HPS: at least 2 seconds, in seconds */
+	unsigned long cl_connect; /* HPS: Client Connect Timeout, in jiffies */
+	int client_init; /* HPS: Clients Enumeration Timeout, in seconds */
+	unsigned long pgi; /* PG Isolation time response, in jiffies */
+	unsigned int d0i3; /* D0i3 set/unset max response time, in jiffies */
+	unsigned long hbm; /* HBM operation timeout, in jiffies */
+	unsigned long mkhi_recv; /* receive timeout, in jiffies */
+};
+
 /**
  * struct mei_device -  MEI private device struct
  *
@@ -480,6 +491,8 @@ struct mei_fw_version {
  * @allow_fixed_address: allow user space to connect a fixed client
  * @override_fixed_address: force allow fixed address behavior
  *
+ * @timeouts: actual timeout values
+ *
  * @reset_work  : work item for the device reset
  * @bus_rescan_work : work item for the bus rescan
  *
@@ -568,6 +581,8 @@ struct mei_device {
 	bool allow_fixed_address;
 	bool override_fixed_address;
 
+	struct mei_dev_timeouts timeouts;
+
 	struct work_struct reset_work;
 	struct work_struct bus_rescan_work;
 
@@ -632,6 +647,7 @@ static inline u32 mei_slots2data(int slots)
  */
 void mei_device_init(struct mei_device *dev,
 		     struct device *device,
+		     bool slow_fw,
 		     const struct mei_hw_ops *hw_ops);
 int mei_reset(struct mei_device *dev);
 int mei_start(struct mei_device *dev);
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index 33e58821e478..0288784f8ffd 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -201,7 +201,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	}
 
 	/* allocates and initializes the mei dev structure */
-	dev = mei_me_dev_init(&pdev->dev, cfg);
+	dev = mei_me_dev_init(&pdev->dev, cfg, false);
 	if (!dev) {
 		err = -ENOMEM;
 		goto end;
-- 
2.32.0

[Intel-gfx] [PATCH 14/20] drm/i915/dg2: add gsc with special gsc bar offsets

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

DG2 uses different GSC offsets on memory bar
and uses PXP head (HECI1).

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gsc.c | 15 +++++++++++++++
 drivers/gpu/drm/i915/i915_pci.c     |  1 +
 drivers/gpu/drm/i915/i915_reg.h     |  2 ++
 3 files changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
index ffe6716590f0..bfc307e49bf9 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.c
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
@@ -69,6 +69,19 @@ static const struct gsc_def gsc_def_xehpsdv[] = {
 	}
 };
 
+static const struct gsc_def gsc_def_dg2[] = {
+	{
+		.name = "mei-gsc",
+		.bar = DG2_GSC_HECI1_BASE,
+		.bar_size = GSC_BAR_LENGTH,
+	},
+	{
+		.name = "mei-gscfi",
+		.bar = DG2_GSC_HECI2_BASE,
+		.bar_size = GSC_BAR_LENGTH,
+	}
+};
+
 static void gsc_release_dev(struct device *dev)
 {
 	struct auxiliary_device *aux_dev = to_auxiliary_dev(dev);
@@ -109,6 +122,8 @@ static void gsc_init_one(struct drm_i915_private *i915,
 		def = &gsc_def_dg1[intf_id];
 	} else if (IS_XEHPSDV(i915)) {
 		def = &gsc_def_xehpsdv[intf_id];
+	} else if (IS_DG2(i915)) {
+		def = &gsc_def_dg2[intf_id];
 	} else {
 		drm_warn_once(&i915->drm, "Unknown platform\n");
 		return;
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 06e6dad0d7f7..cb6dcc3f48f4 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -1051,6 +1051,7 @@ static const struct intel_device_info xehpsdv_info = {
 	.has_4tile = 1, \
 	.has_64k_pages = 1, \
 	.has_guc_deprivilege = 1, \
+	.has_heci_pxp = 1, \
 	.needs_compact_pt = 1, \
 	.platform_engine_mask = \
 		BIT(RCS0) | BIT(BCS0) | \
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 1dd7b7de6002..efcfe32cd8eb 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -978,6 +978,8 @@
 #define BLT_RING_BASE		0x22000
 #define DG1_GSC_HECI1_BASE	0x00258000
 #define DG1_GSC_HECI2_BASE	0x00259000
+#define DG2_GSC_HECI1_BASE	0x00373000
+#define DG2_GSC_HECI2_BASE	0x00374000
 
 
 
-- 
2.32.0

[PATCH 14/20] drm/i915/dg2: add gsc with special gsc bar offsets

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

DG2 uses different GSC offsets on memory bar
and uses PXP head (HECI1).

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gsc.c | 15 +++++++++++++++
 drivers/gpu/drm/i915/i915_pci.c     |  1 +
 drivers/gpu/drm/i915/i915_reg.h     |  2 ++
 3 files changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
index ffe6716590f0..bfc307e49bf9 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.c
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
@@ -69,6 +69,19 @@ static const struct gsc_def gsc_def_xehpsdv[] = {
 	}
 };
 
+static const struct gsc_def gsc_def_dg2[] = {
+	{
+		.name = "mei-gsc",
+		.bar = DG2_GSC_HECI1_BASE,
+		.bar_size = GSC_BAR_LENGTH,
+	},
+	{
+		.name = "mei-gscfi",
+		.bar = DG2_GSC_HECI2_BASE,
+		.bar_size = GSC_BAR_LENGTH,
+	}
+};
+
 static void gsc_release_dev(struct device *dev)
 {
 	struct auxiliary_device *aux_dev = to_auxiliary_dev(dev);
@@ -109,6 +122,8 @@ static void gsc_init_one(struct drm_i915_private *i915,
 		def = &gsc_def_dg1[intf_id];
 	} else if (IS_XEHPSDV(i915)) {
 		def = &gsc_def_xehpsdv[intf_id];
+	} else if (IS_DG2(i915)) {
+		def = &gsc_def_dg2[intf_id];
 	} else {
 		drm_warn_once(&i915->drm, "Unknown platform\n");
 		return;
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 06e6dad0d7f7..cb6dcc3f48f4 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -1051,6 +1051,7 @@ static const struct intel_device_info xehpsdv_info = {
 	.has_4tile = 1, \
 	.has_64k_pages = 1, \
 	.has_guc_deprivilege = 1, \
+	.has_heci_pxp = 1, \
 	.needs_compact_pt = 1, \
 	.platform_engine_mask = \
 		BIT(RCS0) | BIT(BCS0) | \
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 1dd7b7de6002..efcfe32cd8eb 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -978,6 +978,8 @@
 #define BLT_RING_BASE		0x22000
 #define DG1_GSC_HECI1_BASE	0x00258000
 #define DG1_GSC_HECI2_BASE	0x00259000
+#define DG2_GSC_HECI1_BASE	0x00373000
+#define DG2_GSC_HECI2_BASE	0x00374000
 
 
 
-- 
2.32.0

[Intel-gfx] [PATCH 15/20] mei: bus: export common mkhi definitions into a separate header

[Alexander Usyskin]

From: Vitaly Lubart <vitaly.lubart@intel.com>

Exported common mkhi definitions from bus-fixup.c into a separate
header file mkhi.h for other driver usage.

Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/bus-fixup.c | 32 ++-----------------------
 drivers/misc/mei/mkhi.h      | 45 ++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+), 30 deletions(-)
 create mode 100644 drivers/misc/mei/mkhi.h

diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
index 24e91a9ea558..190691abddc9 100644
--- a/drivers/misc/mei/bus-fixup.c
+++ b/drivers/misc/mei/bus-fixup.c
@@ -15,6 +15,7 @@
 
 #include "mei_dev.h"
 #include "client.h"
+#include "mkhi.h"
 
 #define MEI_UUID_NFC_INFO UUID_LE(0xd2de1625, 0x382d, 0x417d, \
 			0x48, 0xa4, 0xef, 0xab, 0xba, 0x8a, 0x12, 0x06)
@@ -80,6 +81,7 @@ static void whitelist(struct mei_cl_device *cldev)
 }
 
 #define OSTYPE_LINUX    2
+
 struct mei_os_ver {
 	__le16 build;
 	__le16 reserved1;
@@ -89,20 +91,6 @@ struct mei_os_ver {
 	u8  reserved2;
 } __packed;
 
-#define MKHI_FEATURE_PTT 0x10
-
-struct mkhi_rule_id {
-	__le16 rule_type;
-	u8 feature_id;
-	u8 reserved;
-} __packed;
-
-struct mkhi_fwcaps {
-	struct mkhi_rule_id id;
-	u8 len;
-	u8 data[];
-} __packed;
-
 struct mkhi_fw_ver_block {
 	u16 minor;
 	u8 major;
@@ -115,22 +103,6 @@ struct mkhi_fw_ver {
 	struct mkhi_fw_ver_block ver[MEI_MAX_FW_VER_BLOCKS];
 } __packed;
 
-#define MKHI_FWCAPS_GROUP_ID 0x3
-#define MKHI_FWCAPS_SET_OS_VER_APP_RULE_CMD 6
-#define MKHI_GEN_GROUP_ID 0xFF
-#define MKHI_GEN_GET_FW_VERSION_CMD 0x2
-struct mkhi_msg_hdr {
-	u8  group_id;
-	u8  command;
-	u8  reserved;
-	u8  result;
-} __packed;
-
-struct mkhi_msg {
-	struct mkhi_msg_hdr hdr;
-	u8 data[];
-} __packed;
-
 #define MKHI_OSVER_BUF_LEN (sizeof(struct mkhi_msg_hdr) + \
 			    sizeof(struct mkhi_fwcaps) + \
 			    sizeof(struct mei_os_ver))
diff --git a/drivers/misc/mei/mkhi.h b/drivers/misc/mei/mkhi.h
new file mode 100644
index 000000000000..27a9b476904e
--- /dev/null
+++ b/drivers/misc/mei/mkhi.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2003-2020, Intel Corporation. All rights reserved.
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ */
+
+#ifndef _MEI_MKHI_H_
+#define _MEI_MKHI_H_
+
+#include "mei_dev.h"
+
+#define MKHI_FEATURE_PTT 0x10
+
+#define MKHI_FWCAPS_GROUP_ID 0x3
+#define MKHI_FWCAPS_SET_OS_VER_APP_RULE_CMD 6
+#define MKHI_GEN_GROUP_ID 0xFF
+#define MKHI_GEN_GET_FW_VERSION_CMD 0x2
+
+#define MCHI_GROUP_ID  0xA
+
+struct mkhi_rule_id {
+	__le16 rule_type;
+	u8 feature_id;
+	u8 reserved;
+} __packed;
+
+struct mkhi_fwcaps {
+	struct mkhi_rule_id id;
+	u8 len;
+	u8 data[];
+} __packed;
+
+struct mkhi_msg_hdr {
+	u8  group_id;
+	u8  command;
+	u8  reserved;
+	u8  result;
+} __packed;
+
+struct mkhi_msg {
+	struct mkhi_msg_hdr hdr;
+	u8 data[];
+} __packed;
+
+#endif /* _MEI_MKHI_H_ */
-- 
2.32.0

[PATCH 15/20] mei: bus: export common mkhi definitions into a separate header

[Alexander Usyskin]

From: Vitaly Lubart <vitaly.lubart@intel.com>

Exported common mkhi definitions from bus-fixup.c into a separate
header file mkhi.h for other driver usage.

Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/bus-fixup.c | 32 ++-----------------------
 drivers/misc/mei/mkhi.h      | 45 ++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+), 30 deletions(-)
 create mode 100644 drivers/misc/mei/mkhi.h

diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
index 24e91a9ea558..190691abddc9 100644
--- a/drivers/misc/mei/bus-fixup.c
+++ b/drivers/misc/mei/bus-fixup.c
@@ -15,6 +15,7 @@
 
 #include "mei_dev.h"
 #include "client.h"
+#include "mkhi.h"
 
 #define MEI_UUID_NFC_INFO UUID_LE(0xd2de1625, 0x382d, 0x417d, \
 			0x48, 0xa4, 0xef, 0xab, 0xba, 0x8a, 0x12, 0x06)
@@ -80,6 +81,7 @@ static void whitelist(struct mei_cl_device *cldev)
 }
 
 #define OSTYPE_LINUX    2
+
 struct mei_os_ver {
 	__le16 build;
 	__le16 reserved1;
@@ -89,20 +91,6 @@ struct mei_os_ver {
 	u8  reserved2;
 } __packed;
 
-#define MKHI_FEATURE_PTT 0x10
-
-struct mkhi_rule_id {
-	__le16 rule_type;
-	u8 feature_id;
-	u8 reserved;
-} __packed;
-
-struct mkhi_fwcaps {
-	struct mkhi_rule_id id;
-	u8 len;
-	u8 data[];
-} __packed;
-
 struct mkhi_fw_ver_block {
 	u16 minor;
 	u8 major;
@@ -115,22 +103,6 @@ struct mkhi_fw_ver {
 	struct mkhi_fw_ver_block ver[MEI_MAX_FW_VER_BLOCKS];
 } __packed;
 
-#define MKHI_FWCAPS_GROUP_ID 0x3
-#define MKHI_FWCAPS_SET_OS_VER_APP_RULE_CMD 6
-#define MKHI_GEN_GROUP_ID 0xFF
-#define MKHI_GEN_GET_FW_VERSION_CMD 0x2
-struct mkhi_msg_hdr {
-	u8  group_id;
-	u8  command;
-	u8  reserved;
-	u8  result;
-} __packed;
-
-struct mkhi_msg {
-	struct mkhi_msg_hdr hdr;
-	u8 data[];
-} __packed;
-
 #define MKHI_OSVER_BUF_LEN (sizeof(struct mkhi_msg_hdr) + \
 			    sizeof(struct mkhi_fwcaps) + \
 			    sizeof(struct mei_os_ver))
diff --git a/drivers/misc/mei/mkhi.h b/drivers/misc/mei/mkhi.h
new file mode 100644
index 000000000000..27a9b476904e
--- /dev/null
+++ b/drivers/misc/mei/mkhi.h
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2003-2020, Intel Corporation. All rights reserved.
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ */
+
+#ifndef _MEI_MKHI_H_
+#define _MEI_MKHI_H_
+
+#include "mei_dev.h"
+
+#define MKHI_FEATURE_PTT 0x10
+
+#define MKHI_FWCAPS_GROUP_ID 0x3
+#define MKHI_FWCAPS_SET_OS_VER_APP_RULE_CMD 6
+#define MKHI_GEN_GROUP_ID 0xFF
+#define MKHI_GEN_GET_FW_VERSION_CMD 0x2
+
+#define MCHI_GROUP_ID  0xA
+
+struct mkhi_rule_id {
+	__le16 rule_type;
+	u8 feature_id;
+	u8 reserved;
+} __packed;
+
+struct mkhi_fwcaps {
+	struct mkhi_rule_id id;
+	u8 len;
+	u8 data[];
+} __packed;
+
+struct mkhi_msg_hdr {
+	u8  group_id;
+	u8  command;
+	u8  reserved;
+	u8  result;
+} __packed;
+
+struct mkhi_msg {
+	struct mkhi_msg_hdr hdr;
+	u8 data[];
+} __packed;
+
+#endif /* _MEI_MKHI_H_ */
-- 
2.32.0

[Intel-gfx] [PATCH 16/20] mei: mkhi: add memory ready command

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

Add GSC memory ready command.
The command indicates to the firmware that
extend operation memory was setup and
the firmware may enter PXP mode.

CC: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/mkhi.h | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/mkhi.h b/drivers/misc/mei/mkhi.h
index 27a9b476904e..ea9fe487cb0f 100644
--- a/drivers/misc/mei/mkhi.h
+++ b/drivers/misc/mei/mkhi.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /*
- * Copyright (c) 2003-2020, Intel Corporation. All rights reserved.
+ * Copyright (c) 2003-2021, Intel Corporation. All rights reserved.
  * Intel Management Engine Interface (Intel MEI) Linux driver
  */
 
@@ -18,6 +18,13 @@
 
 #define MCHI_GROUP_ID  0xA
 
+#define MKHI_GROUP_ID_GFX              0x30
+#define MKHI_GFX_RESET_WARN_CMD_REQ    0x0
+#define MKHI_GFX_MEMORY_READY_CMD_REQ  0x1
+
+/* Allow transition to PXP mode without approval */
+#define MKHI_GFX_MEM_READY_PXP_ALLOWED  0x1
+
 struct mkhi_rule_id {
 	__le16 rule_type;
 	u8 feature_id;
@@ -42,4 +49,9 @@ struct mkhi_msg {
 	u8 data[];
 } __packed;
 
+struct mkhi_gfx_mem_ready {
+	struct mkhi_msg_hdr hdr;
+	uint32_t flags;
+} __packed;
+
 #endif /* _MEI_MKHI_H_ */
-- 
2.32.0

[PATCH 16/20] mei: mkhi: add memory ready command

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

Add GSC memory ready command.
The command indicates to the firmware that
extend operation memory was setup and
the firmware may enter PXP mode.

CC: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/mkhi.h | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/mei/mkhi.h b/drivers/misc/mei/mkhi.h
index 27a9b476904e..ea9fe487cb0f 100644
--- a/drivers/misc/mei/mkhi.h
+++ b/drivers/misc/mei/mkhi.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 /*
- * Copyright (c) 2003-2020, Intel Corporation. All rights reserved.
+ * Copyright (c) 2003-2021, Intel Corporation. All rights reserved.
  * Intel Management Engine Interface (Intel MEI) Linux driver
  */
 
@@ -18,6 +18,13 @@
 
 #define MCHI_GROUP_ID  0xA
 
+#define MKHI_GROUP_ID_GFX              0x30
+#define MKHI_GFX_RESET_WARN_CMD_REQ    0x0
+#define MKHI_GFX_MEMORY_READY_CMD_REQ  0x1
+
+/* Allow transition to PXP mode without approval */
+#define MKHI_GFX_MEM_READY_PXP_ALLOWED  0x1
+
 struct mkhi_rule_id {
 	__le16 rule_type;
 	u8 feature_id;
@@ -42,4 +49,9 @@ struct mkhi_msg {
 	u8 data[];
 } __packed;
 
+struct mkhi_gfx_mem_ready {
+	struct mkhi_msg_hdr hdr;
+	uint32_t flags;
+} __packed;
+
 #endif /* _MEI_MKHI_H_ */
-- 
2.32.0

[Intel-gfx] [PATCH 17/20] mei: gsc: setup gsc extended operational memory

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

1. Retrieve extended operational memory physical pointers from the
   auxiliary device info.
2. Setup memory registers.
3. Notify firmware that the memory is ready by sending the memory
   ready command.
4. Disable PXP device if GSC is not in PXP mode.

CC: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
---
 drivers/misc/mei/bus-fixup.c  | 70 ++++++++++++++++++++++++++++++++++-
 drivers/misc/mei/gsc-me.c     | 16 ++++++++
 drivers/misc/mei/hw-me-regs.h |  7 ++++
 drivers/misc/mei/hw-me.c      | 28 +++++++++++++-
 drivers/misc/mei/mei_dev.h    | 10 +++++
 include/linux/mei_aux.h       |  1 +
 6 files changed, 129 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
index 190691abddc9..d2929f68604d 100644
--- a/drivers/misc/mei/bus-fixup.c
+++ b/drivers/misc/mei/bus-fixup.c
@@ -189,6 +189,19 @@ static int mei_fwver(struct mei_cl_device *cldev)
 	return ret;
 }
 
+static int mei_gfx_memory_ready(struct mei_cl_device *cldev)
+{
+	struct mkhi_gfx_mem_ready req = {0};
+	unsigned int mode = MEI_CL_IO_TX_INTERNAL;
+
+	req.hdr.group_id = MKHI_GROUP_ID_GFX;
+	req.hdr.command = MKHI_GFX_MEMORY_READY_CMD_REQ;
+	req.flags = MKHI_GFX_MEM_READY_PXP_ALLOWED;
+
+	dev_dbg(&cldev->dev, "Sending memory ready command\n");
+	return __mei_cl_send(cldev->cl, (u8 *)&req, sizeof(req), 0, mode);
+}
+
 static void mei_mkhi_fix(struct mei_cl_device *cldev)
 {
 	int ret;
@@ -235,6 +248,39 @@ static void mei_gsc_mkhi_ver(struct mei_cl_device *cldev)
 		dev_err(&cldev->dev, "FW version command failed %d\n", ret);
 	mei_cldev_disable(cldev);
 }
+
+static void mei_gsc_mkhi_fix_ver(struct mei_cl_device *cldev)
+{
+	int ret;
+
+	/* No need to enable the client if nothing is needed from it */
+	if (!cldev->bus->fw_f_fw_ver_supported &&
+	    (cldev->bus->pxp_mode != MEI_DEV_PXP_INIT))
+		return;
+
+	ret = mei_cldev_enable(cldev);
+	if (ret)
+		return;
+
+	if (cldev->bus->pxp_mode == MEI_DEV_PXP_INIT) {
+		ret = mei_gfx_memory_ready(cldev);
+		if (ret < 0)
+			dev_err(&cldev->dev, "memory ready command failed %d\n", ret);
+		else
+			dev_dbg(&cldev->dev, "memory ready command sent\n");
+		/* we go to reset after that */
+		cldev->bus->pxp_mode = MEI_DEV_PXP_SETUP;
+		goto out;
+	}
+
+	ret = mei_fwver(cldev);
+	if (ret < 0)
+		dev_err(&cldev->dev, "FW version command failed %d\n",
+			ret);
+out:
+	mei_cldev_disable(cldev);
+}
+
 /**
  * mei_wd - wd client on the bus, change protocol version
  *   as the API has changed.
@@ -474,6 +520,26 @@ static void vt_support(struct mei_cl_device *cldev)
 		cldev->do_match = 1;
 }
 
+/**
+ * pxp_isready - enable bus client if pxp is ready
+ *
+ * @cldev: me clients device
+ */
+static void pxp_isready(struct mei_cl_device *cldev)
+{
+	struct mei_device *bus = cldev->bus;
+
+	switch (bus->pxp_mode) {
+	case MEI_DEV_PXP_READY:
+	case MEI_DEV_PXP_DEFAULT:
+		cldev->do_match = 1;
+	break;
+	default:
+		cldev->do_match = 0;
+	break;
+	}
+}
+
 #define MEI_FIXUP(_uuid, _hook) { _uuid, _hook }
 
 static struct mei_fixup {
@@ -487,10 +553,10 @@ static struct mei_fixup {
 	MEI_FIXUP(MEI_UUID_WD, mei_wd),
 	MEI_FIXUP(MEI_UUID_MKHIF_FIX, mei_mkhi_fix),
 	MEI_FIXUP(MEI_UUID_IGSC_MKHI, mei_gsc_mkhi_ver),
-	MEI_FIXUP(MEI_UUID_IGSC_MKHI_FIX, mei_gsc_mkhi_ver),
+	MEI_FIXUP(MEI_UUID_IGSC_MKHI_FIX, mei_gsc_mkhi_fix_ver),
 	MEI_FIXUP(MEI_UUID_HDCP, whitelist),
 	MEI_FIXUP(MEI_UUID_ANY, vt_support),
-	MEI_FIXUP(MEI_UUID_PAVP, whitelist),
+	MEI_FIXUP(MEI_UUID_PAVP, pxp_isready),
 };
 
 /**
diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index 38d035ae2904..fc9419054290 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -32,6 +32,17 @@ static int mei_gsc_read_hfs(const struct mei_device *dev, int where, u32 *val)
 	return 0;
 }
 
+static void mei_gsc_set_ext_op_mem(const struct mei_me_hw *hw, struct resource *mem)
+{
+	u32 low = lower_32_bits(mem->start);
+	u32 hi  = upper_32_bits(mem->start);
+	u32 limit = (resource_size(mem) / SZ_4K) | GSC_EXT_OP_MEM_VALID;
+
+	iowrite32(low, hw->mem_addr + H_GSC_EXT_OP_MEM_BASE_ADDR_LO_REG);
+	iowrite32(hi, hw->mem_addr + H_GSC_EXT_OP_MEM_BASE_ADDR_HI_REG);
+	iowrite32(limit, hw->mem_addr + H_GSC_EXT_OP_MEM_LIMIT_REG);
+}
+
 static int mei_gsc_probe(struct auxiliary_device *aux_dev,
 			 const struct auxiliary_device_id *aux_dev_id)
 {
@@ -67,6 +78,11 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
 
 	dev_set_drvdata(device, dev);
 
+	if (adev->ext_op_mem.start) {
+		mei_gsc_set_ext_op_mem(hw, &adev->ext_op_mem);
+		dev->pxp_mode = MEI_DEV_PXP_INIT;
+	}
+
 	/* use polling */
 	if (mei_me_hw_use_polling(hw)) {
 		mei_disable_interrupts(dev);
diff --git a/drivers/misc/mei/hw-me-regs.h b/drivers/misc/mei/hw-me-regs.h
index 64ce3f830262..8bbe3e9f1269 100644
--- a/drivers/misc/mei/hw-me-regs.h
+++ b/drivers/misc/mei/hw-me-regs.h
@@ -125,6 +125,8 @@
 #  define PCI_CFG_HFS_3_FW_SKU_SPS   0x00000060
 #define PCI_CFG_HFS_4         0x64
 #define PCI_CFG_HFS_5         0x68
+#  define GSC_CFG_HFS_5_BOOT_TYPE_MSK      0x00000003
+#  define GSC_CFG_HFS_5_BOOT_TYPE_PXP               3
 #define PCI_CFG_HFS_6         0x6C
 
 /* MEI registers */
@@ -141,6 +143,11 @@
 /* H_D0I3C - D0I3 Control  */
 #define H_D0I3C    0x800
 
+#define H_GSC_EXT_OP_MEM_BASE_ADDR_LO_REG 0x100
+#define H_GSC_EXT_OP_MEM_BASE_ADDR_HI_REG 0x104
+#define H_GSC_EXT_OP_MEM_LIMIT_REG        0x108
+#define GSC_EXT_OP_MEM_VALID              BIT(31)
+
 /* register bits of H_CSR (Host Control Status register) */
 /* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
 #define H_CBD             0xFF000000
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 93d8b6dcedda..b70a36021fc4 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -433,6 +433,29 @@ static bool mei_me_hw_is_resetting(struct mei_device *dev)
 	return (mecsr & ME_RST_HRA) == ME_RST_HRA;
 }
 
+/**
+ * mei_gsc_pxp_check - check for gsc firmware entering pxp mode
+ *
+ * @dev: the device structure
+ */
+static void mei_gsc_pxp_check(struct mei_device *dev)
+{
+	struct mei_me_hw *hw = to_me_hw(dev);
+	u32 fwsts5 = 0;
+
+	if (dev->pxp_mode == MEI_DEV_PXP_DEFAULT)
+		return;
+
+	hw->read_fws(dev, PCI_CFG_HFS_5, &fwsts5);
+	trace_mei_pci_cfg_read(dev->dev, "PCI_CFG_HFS_5", PCI_CFG_HFS_5, fwsts5);
+	if ((fwsts5 & GSC_CFG_HFS_5_BOOT_TYPE_MSK) == GSC_CFG_HFS_5_BOOT_TYPE_PXP) {
+		dev_dbg(dev->dev, "pxp mode is ready 0x%08x\n", fwsts5);
+		dev->pxp_mode = MEI_DEV_PXP_READY;
+	} else {
+		dev_dbg(dev->dev, "pxp mode is not ready 0x%08x\n", fwsts5);
+	}
+}
+
 /**
  * mei_me_hw_ready_wait - wait until the me(hw) has turned ready
  *  or timeout is reached
@@ -452,6 +475,8 @@ static int mei_me_hw_ready_wait(struct mei_device *dev)
 		return -ETIME;
 	}
 
+	mei_gsc_pxp_check(dev);
+
 	mei_me_hw_reset_release(dev);
 	dev->recvd_hw_ready = false;
 	return 0;
@@ -1268,7 +1293,8 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
 
 	/* check if ME wants a reset */
 	if (!mei_hw_is_ready(dev) && dev->dev_state != MEI_DEV_RESETTING) {
-		dev_warn(dev->dev, "FW not ready: resetting.\n");
+		dev_warn(dev->dev, "FW not ready: resetting: dev_state = %d pxp = %d\n",
+			 dev->dev_state, dev->pxp_mode);
 		if (dev->dev_state == MEI_DEV_POWERING_DOWN ||
 		    dev->dev_state == MEI_DEV_POWER_DOWN)
 			mei_cl_all_disconnect(dev);
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 16f59b3a45fc..7c508bca9a00 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -62,6 +62,14 @@ enum mei_dev_state {
 	MEI_DEV_POWER_UP
 };
 
+/* MEI PXP mode state */
+enum mei_dev_pxp_mode {
+	MEI_DEV_PXP_DEFAULT = 0,
+	MEI_DEV_PXP_INIT    = 1,
+	MEI_DEV_PXP_SETUP   = 2,
+	MEI_DEV_PXP_READY   = 3,
+};
+
 const char *mei_dev_state_str(int state);
 
 enum mei_file_transaction_states {
@@ -454,6 +462,7 @@ struct mei_dev_timeouts {
  * @reset_count : number of consecutive resets
  * @dev_state   : device state
  * @hbm_state   : state of host bus message protocol
+ * @pxp_mode    : PXP device mode
  * @init_clients_timer : HBM init handshake timeout
  *
  * @pg_event    : power gating event
@@ -537,6 +546,7 @@ struct mei_device {
 	unsigned long reset_count;
 	enum mei_dev_state dev_state;
 	enum mei_hbm_state hbm_state;
+	enum mei_dev_pxp_mode pxp_mode;
 	u16 init_clients_timer;
 
 	/*
diff --git a/include/linux/mei_aux.h b/include/linux/mei_aux.h
index a29f4064b9c0..c3fc137a2aba 100644
--- a/include/linux/mei_aux.h
+++ b/include/linux/mei_aux.h
@@ -11,6 +11,7 @@ struct mei_aux_device {
 	struct auxiliary_device aux_dev;
 	int irq;
 	struct resource bar;
+	struct resource ext_op_mem;
 	bool slow_fw;
 };
 
-- 
2.32.0

[PATCH 17/20] mei: gsc: setup gsc extended operational memory

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

1. Retrieve extended operational memory physical pointers from the
   auxiliary device info.
2. Setup memory registers.
3. Notify firmware that the memory is ready by sending the memory
   ready command.
4. Disable PXP device if GSC is not in PXP mode.

CC: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
---
 drivers/misc/mei/bus-fixup.c  | 70 ++++++++++++++++++++++++++++++++++-
 drivers/misc/mei/gsc-me.c     | 16 ++++++++
 drivers/misc/mei/hw-me-regs.h |  7 ++++
 drivers/misc/mei/hw-me.c      | 28 +++++++++++++-
 drivers/misc/mei/mei_dev.h    | 10 +++++
 include/linux/mei_aux.h       |  1 +
 6 files changed, 129 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
index 190691abddc9..d2929f68604d 100644
--- a/drivers/misc/mei/bus-fixup.c
+++ b/drivers/misc/mei/bus-fixup.c
@@ -189,6 +189,19 @@ static int mei_fwver(struct mei_cl_device *cldev)
 	return ret;
 }
 
+static int mei_gfx_memory_ready(struct mei_cl_device *cldev)
+{
+	struct mkhi_gfx_mem_ready req = {0};
+	unsigned int mode = MEI_CL_IO_TX_INTERNAL;
+
+	req.hdr.group_id = MKHI_GROUP_ID_GFX;
+	req.hdr.command = MKHI_GFX_MEMORY_READY_CMD_REQ;
+	req.flags = MKHI_GFX_MEM_READY_PXP_ALLOWED;
+
+	dev_dbg(&cldev->dev, "Sending memory ready command\n");
+	return __mei_cl_send(cldev->cl, (u8 *)&req, sizeof(req), 0, mode);
+}
+
 static void mei_mkhi_fix(struct mei_cl_device *cldev)
 {
 	int ret;
@@ -235,6 +248,39 @@ static void mei_gsc_mkhi_ver(struct mei_cl_device *cldev)
 		dev_err(&cldev->dev, "FW version command failed %d\n", ret);
 	mei_cldev_disable(cldev);
 }
+
+static void mei_gsc_mkhi_fix_ver(struct mei_cl_device *cldev)
+{
+	int ret;
+
+	/* No need to enable the client if nothing is needed from it */
+	if (!cldev->bus->fw_f_fw_ver_supported &&
+	    (cldev->bus->pxp_mode != MEI_DEV_PXP_INIT))
+		return;
+
+	ret = mei_cldev_enable(cldev);
+	if (ret)
+		return;
+
+	if (cldev->bus->pxp_mode == MEI_DEV_PXP_INIT) {
+		ret = mei_gfx_memory_ready(cldev);
+		if (ret < 0)
+			dev_err(&cldev->dev, "memory ready command failed %d\n", ret);
+		else
+			dev_dbg(&cldev->dev, "memory ready command sent\n");
+		/* we go to reset after that */
+		cldev->bus->pxp_mode = MEI_DEV_PXP_SETUP;
+		goto out;
+	}
+
+	ret = mei_fwver(cldev);
+	if (ret < 0)
+		dev_err(&cldev->dev, "FW version command failed %d\n",
+			ret);
+out:
+	mei_cldev_disable(cldev);
+}
+
 /**
  * mei_wd - wd client on the bus, change protocol version
  *   as the API has changed.
@@ -474,6 +520,26 @@ static void vt_support(struct mei_cl_device *cldev)
 		cldev->do_match = 1;
 }
 
+/**
+ * pxp_isready - enable bus client if pxp is ready
+ *
+ * @cldev: me clients device
+ */
+static void pxp_isready(struct mei_cl_device *cldev)
+{
+	struct mei_device *bus = cldev->bus;
+
+	switch (bus->pxp_mode) {
+	case MEI_DEV_PXP_READY:
+	case MEI_DEV_PXP_DEFAULT:
+		cldev->do_match = 1;
+	break;
+	default:
+		cldev->do_match = 0;
+	break;
+	}
+}
+
 #define MEI_FIXUP(_uuid, _hook) { _uuid, _hook }
 
 static struct mei_fixup {
@@ -487,10 +553,10 @@ static struct mei_fixup {
 	MEI_FIXUP(MEI_UUID_WD, mei_wd),
 	MEI_FIXUP(MEI_UUID_MKHIF_FIX, mei_mkhi_fix),
 	MEI_FIXUP(MEI_UUID_IGSC_MKHI, mei_gsc_mkhi_ver),
-	MEI_FIXUP(MEI_UUID_IGSC_MKHI_FIX, mei_gsc_mkhi_ver),
+	MEI_FIXUP(MEI_UUID_IGSC_MKHI_FIX, mei_gsc_mkhi_fix_ver),
 	MEI_FIXUP(MEI_UUID_HDCP, whitelist),
 	MEI_FIXUP(MEI_UUID_ANY, vt_support),
-	MEI_FIXUP(MEI_UUID_PAVP, whitelist),
+	MEI_FIXUP(MEI_UUID_PAVP, pxp_isready),
 };
 
 /**
diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index 38d035ae2904..fc9419054290 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -32,6 +32,17 @@ static int mei_gsc_read_hfs(const struct mei_device *dev, int where, u32 *val)
 	return 0;
 }
 
+static void mei_gsc_set_ext_op_mem(const struct mei_me_hw *hw, struct resource *mem)
+{
+	u32 low = lower_32_bits(mem->start);
+	u32 hi  = upper_32_bits(mem->start);
+	u32 limit = (resource_size(mem) / SZ_4K) | GSC_EXT_OP_MEM_VALID;
+
+	iowrite32(low, hw->mem_addr + H_GSC_EXT_OP_MEM_BASE_ADDR_LO_REG);
+	iowrite32(hi, hw->mem_addr + H_GSC_EXT_OP_MEM_BASE_ADDR_HI_REG);
+	iowrite32(limit, hw->mem_addr + H_GSC_EXT_OP_MEM_LIMIT_REG);
+}
+
 static int mei_gsc_probe(struct auxiliary_device *aux_dev,
 			 const struct auxiliary_device_id *aux_dev_id)
 {
@@ -67,6 +78,11 @@ static int mei_gsc_probe(struct auxiliary_device *aux_dev,
 
 	dev_set_drvdata(device, dev);
 
+	if (adev->ext_op_mem.start) {
+		mei_gsc_set_ext_op_mem(hw, &adev->ext_op_mem);
+		dev->pxp_mode = MEI_DEV_PXP_INIT;
+	}
+
 	/* use polling */
 	if (mei_me_hw_use_polling(hw)) {
 		mei_disable_interrupts(dev);
diff --git a/drivers/misc/mei/hw-me-regs.h b/drivers/misc/mei/hw-me-regs.h
index 64ce3f830262..8bbe3e9f1269 100644
--- a/drivers/misc/mei/hw-me-regs.h
+++ b/drivers/misc/mei/hw-me-regs.h
@@ -125,6 +125,8 @@
 #  define PCI_CFG_HFS_3_FW_SKU_SPS   0x00000060
 #define PCI_CFG_HFS_4         0x64
 #define PCI_CFG_HFS_5         0x68
+#  define GSC_CFG_HFS_5_BOOT_TYPE_MSK      0x00000003
+#  define GSC_CFG_HFS_5_BOOT_TYPE_PXP               3
 #define PCI_CFG_HFS_6         0x6C
 
 /* MEI registers */
@@ -141,6 +143,11 @@
 /* H_D0I3C - D0I3 Control  */
 #define H_D0I3C    0x800
 
+#define H_GSC_EXT_OP_MEM_BASE_ADDR_LO_REG 0x100
+#define H_GSC_EXT_OP_MEM_BASE_ADDR_HI_REG 0x104
+#define H_GSC_EXT_OP_MEM_LIMIT_REG        0x108
+#define GSC_EXT_OP_MEM_VALID              BIT(31)
+
 /* register bits of H_CSR (Host Control Status register) */
 /* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
 #define H_CBD             0xFF000000
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 93d8b6dcedda..b70a36021fc4 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -433,6 +433,29 @@ static bool mei_me_hw_is_resetting(struct mei_device *dev)
 	return (mecsr & ME_RST_HRA) == ME_RST_HRA;
 }
 
+/**
+ * mei_gsc_pxp_check - check for gsc firmware entering pxp mode
+ *
+ * @dev: the device structure
+ */
+static void mei_gsc_pxp_check(struct mei_device *dev)
+{
+	struct mei_me_hw *hw = to_me_hw(dev);
+	u32 fwsts5 = 0;
+
+	if (dev->pxp_mode == MEI_DEV_PXP_DEFAULT)
+		return;
+
+	hw->read_fws(dev, PCI_CFG_HFS_5, &fwsts5);
+	trace_mei_pci_cfg_read(dev->dev, "PCI_CFG_HFS_5", PCI_CFG_HFS_5, fwsts5);
+	if ((fwsts5 & GSC_CFG_HFS_5_BOOT_TYPE_MSK) == GSC_CFG_HFS_5_BOOT_TYPE_PXP) {
+		dev_dbg(dev->dev, "pxp mode is ready 0x%08x\n", fwsts5);
+		dev->pxp_mode = MEI_DEV_PXP_READY;
+	} else {
+		dev_dbg(dev->dev, "pxp mode is not ready 0x%08x\n", fwsts5);
+	}
+}
+
 /**
  * mei_me_hw_ready_wait - wait until the me(hw) has turned ready
  *  or timeout is reached
@@ -452,6 +475,8 @@ static int mei_me_hw_ready_wait(struct mei_device *dev)
 		return -ETIME;
 	}
 
+	mei_gsc_pxp_check(dev);
+
 	mei_me_hw_reset_release(dev);
 	dev->recvd_hw_ready = false;
 	return 0;
@@ -1268,7 +1293,8 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
 
 	/* check if ME wants a reset */
 	if (!mei_hw_is_ready(dev) && dev->dev_state != MEI_DEV_RESETTING) {
-		dev_warn(dev->dev, "FW not ready: resetting.\n");
+		dev_warn(dev->dev, "FW not ready: resetting: dev_state = %d pxp = %d\n",
+			 dev->dev_state, dev->pxp_mode);
 		if (dev->dev_state == MEI_DEV_POWERING_DOWN ||
 		    dev->dev_state == MEI_DEV_POWER_DOWN)
 			mei_cl_all_disconnect(dev);
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 16f59b3a45fc..7c508bca9a00 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -62,6 +62,14 @@ enum mei_dev_state {
 	MEI_DEV_POWER_UP
 };
 
+/* MEI PXP mode state */
+enum mei_dev_pxp_mode {
+	MEI_DEV_PXP_DEFAULT = 0,
+	MEI_DEV_PXP_INIT    = 1,
+	MEI_DEV_PXP_SETUP   = 2,
+	MEI_DEV_PXP_READY   = 3,
+};
+
 const char *mei_dev_state_str(int state);
 
 enum mei_file_transaction_states {
@@ -454,6 +462,7 @@ struct mei_dev_timeouts {
  * @reset_count : number of consecutive resets
  * @dev_state   : device state
  * @hbm_state   : state of host bus message protocol
+ * @pxp_mode    : PXP device mode
  * @init_clients_timer : HBM init handshake timeout
  *
  * @pg_event    : power gating event
@@ -537,6 +546,7 @@ struct mei_device {
 	unsigned long reset_count;
 	enum mei_dev_state dev_state;
 	enum mei_hbm_state hbm_state;
+	enum mei_dev_pxp_mode pxp_mode;
 	u16 init_clients_timer;
 
 	/*
diff --git a/include/linux/mei_aux.h b/include/linux/mei_aux.h
index a29f4064b9c0..c3fc137a2aba 100644
--- a/include/linux/mei_aux.h
+++ b/include/linux/mei_aux.h
@@ -11,6 +11,7 @@ struct mei_aux_device {
 	struct auxiliary_device aux_dev;
 	int irq;
 	struct resource bar;
+	struct resource ext_op_mem;
 	bool slow_fw;
 };
 
-- 
2.32.0

[Intel-gfx] [PATCH 18/20] mei: gsc: add transition to PXP mode in resume flow

[Alexander Usyskin]

From: Vitaly Lubart <vitaly.lubart@intel.com>

Added transition to PXP mode in resume flow.

CC: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/gsc-me.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index fc9419054290..d75fce49e4f7 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -182,11 +182,22 @@ static int __maybe_unused mei_gsc_pm_suspend(struct device *device)
 static int __maybe_unused mei_gsc_pm_resume(struct device *device)
 {
 	struct mei_device *dev = dev_get_drvdata(device);
+	struct auxiliary_device *aux_dev;
+	struct mei_aux_device *adev;
 	int err;
+	struct mei_me_hw *hw;
 
 	if (!dev)
 		return -ENODEV;
 
+	hw = to_me_hw(dev);
+	aux_dev = to_auxiliary_dev(device);
+	adev = auxiliary_dev_to_mei_aux_dev(aux_dev);
+	if (adev->ext_op_mem.start) {
+		mei_gsc_set_ext_op_mem(hw, &adev->ext_op_mem);
+		dev->pxp_mode = MEI_DEV_PXP_INIT;
+	}
+
 	err = mei_restart(dev);
 	if (err)
 		return err;
-- 
2.32.0

[PATCH 18/20] mei: gsc: add transition to PXP mode in resume flow

[Alexander Usyskin]

From: Vitaly Lubart <vitaly.lubart@intel.com>

Added transition to PXP mode in resume flow.

CC: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/gsc-me.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/misc/mei/gsc-me.c b/drivers/misc/mei/gsc-me.c
index fc9419054290..d75fce49e4f7 100644
--- a/drivers/misc/mei/gsc-me.c
+++ b/drivers/misc/mei/gsc-me.c
@@ -182,11 +182,22 @@ static int __maybe_unused mei_gsc_pm_suspend(struct device *device)
 static int __maybe_unused mei_gsc_pm_resume(struct device *device)
 {
 	struct mei_device *dev = dev_get_drvdata(device);
+	struct auxiliary_device *aux_dev;
+	struct mei_aux_device *adev;
 	int err;
+	struct mei_me_hw *hw;
 
 	if (!dev)
 		return -ENODEV;
 
+	hw = to_me_hw(dev);
+	aux_dev = to_auxiliary_dev(device);
+	adev = auxiliary_dev_to_mei_aux_dev(aux_dev);
+	if (adev->ext_op_mem.start) {
+		mei_gsc_set_ext_op_mem(hw, &adev->ext_op_mem);
+		dev->pxp_mode = MEI_DEV_PXP_INIT;
+	}
+
 	err = mei_restart(dev);
 	if (err)
 		return err;
-- 
2.32.0

[Intel-gfx] [PATCH 19/20] mei: debugfs: add pxp mode to devstate in debugfs

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

CC: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/debugfs.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c
index 1ce61e9e24fc..4074fec866a6 100644
--- a/drivers/misc/mei/debugfs.c
+++ b/drivers/misc/mei/debugfs.c
@@ -86,6 +86,20 @@ static int mei_dbgfs_active_show(struct seq_file *m, void *unused)
 }
 DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_active);
 
+static const char *mei_dev_pxp_mode_str(enum mei_dev_pxp_mode state)
+{
+#define MEI_PXP_MODE(state) case MEI_DEV_PXP_##state: return #state
+	switch (state) {
+	MEI_PXP_MODE(DEFAULT);
+	MEI_PXP_MODE(INIT);
+	MEI_PXP_MODE(SETUP);
+	MEI_PXP_MODE(READY);
+	default:
+		return "unknown";
+	}
+#undef MEI_PXP_MODE
+}
+
 static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused)
 {
 	struct mei_device *dev = m->private;
@@ -112,6 +126,9 @@ static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused)
 	seq_printf(m, "pg:  %s, %s\n",
 		   mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED",
 		   mei_pg_state_str(mei_pg_state(dev)));
+
+	seq_printf(m, "pxp: %s\n", mei_dev_pxp_mode_str(dev->pxp_mode));
+
 	return 0;
 }
 DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_devstate);
-- 
2.32.0

[PATCH 19/20] mei: debugfs: add pxp mode to devstate in debugfs

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

CC: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
---
 drivers/misc/mei/debugfs.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c
index 1ce61e9e24fc..4074fec866a6 100644
--- a/drivers/misc/mei/debugfs.c
+++ b/drivers/misc/mei/debugfs.c
@@ -86,6 +86,20 @@ static int mei_dbgfs_active_show(struct seq_file *m, void *unused)
 }
 DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_active);
 
+static const char *mei_dev_pxp_mode_str(enum mei_dev_pxp_mode state)
+{
+#define MEI_PXP_MODE(state) case MEI_DEV_PXP_##state: return #state
+	switch (state) {
+	MEI_PXP_MODE(DEFAULT);
+	MEI_PXP_MODE(INIT);
+	MEI_PXP_MODE(SETUP);
+	MEI_PXP_MODE(READY);
+	default:
+		return "unknown";
+	}
+#undef MEI_PXP_MODE
+}
+
 static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused)
 {
 	struct mei_device *dev = m->private;
@@ -112,6 +126,9 @@ static int mei_dbgfs_devstate_show(struct seq_file *m, void *unused)
 	seq_printf(m, "pg:  %s, %s\n",
 		   mei_pg_is_enabled(dev) ? "ENABLED" : "DISABLED",
 		   mei_pg_state_str(mei_pg_state(dev)));
+
+	seq_printf(m, "pxp: %s\n", mei_dev_pxp_mode_str(dev->pxp_mode));
+
 	return 0;
 }
 DEFINE_SHOW_ATTRIBUTE(mei_dbgfs_devstate);
-- 
2.32.0

[Intel-gfx] [PATCH 20/20] drm/i915/gsc: allocate extended operational memory in LMEM

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

GSC requires more operational memory than available on chip.
Reserve 4M of LMEM for GSC operation. The memory is provided to the
GSC as struct resource to the auxiliary data of the child device.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Alan Previn <alan.previn.teres.alexis@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gsc.c | 92 ++++++++++++++++++++++++++---
 drivers/gpu/drm/i915/gt/intel_gsc.h |  3 +
 2 files changed, 88 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
index bfc307e49bf9..4d87519d5773 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.c
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
@@ -7,6 +7,7 @@
 #include <linux/mei_aux.h>
 #include "i915_drv.h"
 #include "i915_reg.h"
+#include "gem/i915_gem_region.h"
 #include "gt/intel_gsc.h"
 #include "gt/intel_gt.h"
 
@@ -36,12 +37,68 @@ static int gsc_irq_init(int irq)
 	return irq_set_chip_data(irq, NULL);
 }
 
+static int
+gsc_ext_om_alloc(struct intel_gsc *gsc, struct intel_gsc_intf *intf, size_t size)
+{
+	struct intel_gt *gt = gsc_to_gt(gsc);
+	struct drm_i915_gem_object *obj;
+	void *vaddr;
+	int err;
+
+	obj = i915_gem_object_create_lmem(gt->i915, size, I915_BO_ALLOC_CONTIGUOUS);
+	if (IS_ERR(obj)) {
+		drm_err(&gt->i915->drm, "Failed to allocate gsc memory\n");
+		return PTR_ERR(obj);
+	}
+
+	err = i915_gem_object_pin_pages_unlocked(obj);
+	if (err) {
+		drm_err(&gt->i915->drm, "Failed to pin pages for gsc memory\n");
+		goto out_put;
+	}
+
+	vaddr = i915_gem_object_pin_map_unlocked(obj, i915_coherent_map_type(gt->i915, obj, true));
+	if (IS_ERR(vaddr)) {
+		err = PTR_ERR(vaddr);
+		drm_err(&gt->i915->drm, "Failed to map gsc memory\n");
+		goto out_unpin;
+	}
+
+	memset(vaddr, 0, obj->base.size);
+
+	i915_gem_object_unpin_map(obj);
+
+	intf->gem_obj = obj;
+
+	return 0;
+
+out_unpin:
+	i915_gem_object_unpin_pages(obj);
+out_put:
+	i915_gem_object_put(obj);
+	return err;
+}
+
+static void gsc_ext_om_destroy(struct intel_gsc_intf *intf)
+{
+	struct drm_i915_gem_object *obj = fetch_and_zero(&intf->gem_obj);
+
+	if (!obj)
+		return;
+
+	if (i915_gem_object_has_pinned_pages(obj))
+		i915_gem_object_unpin_pages(obj);
+
+	i915_gem_object_put(obj);
+}
+
 struct gsc_def {
 	const char *name;
 	unsigned long bar;
 	size_t bar_size;
 	bool use_polling;
 	bool slow_fw;
+	size_t lmem_size;
 };
 
 /* gsc resources and definitions (HECI1 and HECI2) */
@@ -74,6 +131,7 @@ static const struct gsc_def gsc_def_dg2[] = {
 		.name = "mei-gsc",
 		.bar = DG2_GSC_HECI1_BASE,
 		.bar_size = GSC_BAR_LENGTH,
+		.lmem_size = SZ_4M,
 	},
 	{
 		.name = "mei-gscfi",
@@ -90,26 +148,33 @@ static void gsc_release_dev(struct device *dev)
 	kfree(adev);
 }
 
-static void gsc_destroy_one(struct intel_gsc_intf *intf)
+static void gsc_destroy_one(struct drm_i915_private *i915,
+				  struct intel_gsc *gsc, unsigned int intf_id)
 {
+	struct intel_gsc_intf *intf = &gsc->intf[intf_id];
+
 	if (intf->adev) {
 		auxiliary_device_delete(&intf->adev->aux_dev);
 		auxiliary_device_uninit(&intf->adev->aux_dev);
 		intf->adev = NULL;
 	}
+
 	if (intf->irq >= 0)
 		irq_free_desc(intf->irq);
 	intf->irq = -1;
+
+	gsc_ext_om_destroy(intf);
 }
 
 static void gsc_init_one(struct drm_i915_private *i915,
-			 struct intel_gsc_intf *intf,
-			 unsigned int intf_id)
+			       struct intel_gsc *gsc,
+			       unsigned int intf_id)
 {
 	struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
 	struct mei_aux_device *adev;
 	struct auxiliary_device *aux_dev;
 	const struct gsc_def *def;
+	struct intel_gsc_intf *intf = &gsc->intf[intf_id];
 	int ret;
 
 	intf->irq = -1;
@@ -141,7 +206,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
 	intf->irq = irq_alloc_desc(0);
 	if (intf->irq < 0) {
 		drm_err(&i915->drm, "gsc irq error %d\n", intf->irq);
-		return;
+		goto fail;
 	}
 
 	ret = gsc_irq_init(intf->irq);
@@ -155,6 +220,19 @@ static void gsc_init_one(struct drm_i915_private *i915,
 	if (!adev)
 		goto fail;
 
+	if (def->lmem_size) {
+		dev_dbg(&pdev->dev, "setting up GSC lmem\n");
+
+		if (gsc_ext_om_alloc(gsc, intf, def->lmem_size)) {
+			dev_err(&pdev->dev, "setting up gsc extended operational memory failed\n");
+			kfree(adev);
+			goto fail;
+		}
+
+		adev->ext_op_mem.start = i915_gem_object_get_dma_address(intf->gem_obj, 0);
+		adev->ext_op_mem.end = adev->ext_op_mem.start + def->lmem_size;
+	}
+
 	adev->irq = intf->irq;
 	adev->bar.parent = &pdev->resource[0];
 	adev->bar.start = def->bar + pdev->resource[0].start;
@@ -188,7 +266,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
 
 	return;
 fail:
-	gsc_destroy_one(intf);
+	gsc_destroy_one(i915, gsc, intf->id);
 }
 
 static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
@@ -229,7 +307,7 @@ void intel_gsc_init(struct intel_gsc *gsc, struct drm_i915_private *i915)
 		return;
 
 	for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
-		gsc_init_one(i915, &gsc->intf[i], i);
+		gsc_init_one(i915, gsc, i);
 }
 
 void intel_gsc_fini(struct intel_gsc *gsc)
@@ -241,5 +319,5 @@ void intel_gsc_fini(struct intel_gsc *gsc)
 		return;
 
 	for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
-		gsc_destroy_one(&gsc->intf[i]);
+		gsc_destroy_one(gt->i915, gsc, i);
 }
diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.h b/drivers/gpu/drm/i915/gt/intel_gsc.h
index 68582f912b21..fcac1775e9c3 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.h
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.h
@@ -20,11 +20,14 @@ struct mei_aux_device;
 
 /**
  * struct intel_gsc - graphics security controller
+ *
+ * @gem_obj: scratch memory GSC operations
  * @intf : gsc interface
  */
 struct intel_gsc {
 	struct intel_gsc_intf {
 		struct mei_aux_device *adev;
+		struct drm_i915_gem_object *gem_obj;
 		int irq;
 		unsigned int id;
 	} intf[INTEL_GSC_NUM_INTERFACES];
-- 
2.32.0

[PATCH 20/20] drm/i915/gsc: allocate extended operational memory in LMEM

[Alexander Usyskin]

From: Tomas Winkler <tomas.winkler@intel.com>

GSC requires more operational memory than available on chip.
Reserve 4M of LMEM for GSC operation. The memory is provided to the
GSC as struct resource to the auxiliary data of the child device.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Alan Previn <alan.previn.teres.alexis@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_gsc.c | 92 ++++++++++++++++++++++++++---
 drivers/gpu/drm/i915/gt/intel_gsc.h |  3 +
 2 files changed, 88 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
index bfc307e49bf9..4d87519d5773 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.c
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
@@ -7,6 +7,7 @@
 #include <linux/mei_aux.h>
 #include "i915_drv.h"
 #include "i915_reg.h"
+#include "gem/i915_gem_region.h"
 #include "gt/intel_gsc.h"
 #include "gt/intel_gt.h"
 
@@ -36,12 +37,68 @@ static int gsc_irq_init(int irq)
 	return irq_set_chip_data(irq, NULL);
 }
 
+static int
+gsc_ext_om_alloc(struct intel_gsc *gsc, struct intel_gsc_intf *intf, size_t size)
+{
+	struct intel_gt *gt = gsc_to_gt(gsc);
+	struct drm_i915_gem_object *obj;
+	void *vaddr;
+	int err;
+
+	obj = i915_gem_object_create_lmem(gt->i915, size, I915_BO_ALLOC_CONTIGUOUS);
+	if (IS_ERR(obj)) {
+		drm_err(&gt->i915->drm, "Failed to allocate gsc memory\n");
+		return PTR_ERR(obj);
+	}
+
+	err = i915_gem_object_pin_pages_unlocked(obj);
+	if (err) {
+		drm_err(&gt->i915->drm, "Failed to pin pages for gsc memory\n");
+		goto out_put;
+	}
+
+	vaddr = i915_gem_object_pin_map_unlocked(obj, i915_coherent_map_type(gt->i915, obj, true));
+	if (IS_ERR(vaddr)) {
+		err = PTR_ERR(vaddr);
+		drm_err(&gt->i915->drm, "Failed to map gsc memory\n");
+		goto out_unpin;
+	}
+
+	memset(vaddr, 0, obj->base.size);
+
+	i915_gem_object_unpin_map(obj);
+
+	intf->gem_obj = obj;
+
+	return 0;
+
+out_unpin:
+	i915_gem_object_unpin_pages(obj);
+out_put:
+	i915_gem_object_put(obj);
+	return err;
+}
+
+static void gsc_ext_om_destroy(struct intel_gsc_intf *intf)
+{
+	struct drm_i915_gem_object *obj = fetch_and_zero(&intf->gem_obj);
+
+	if (!obj)
+		return;
+
+	if (i915_gem_object_has_pinned_pages(obj))
+		i915_gem_object_unpin_pages(obj);
+
+	i915_gem_object_put(obj);
+}
+
 struct gsc_def {
 	const char *name;
 	unsigned long bar;
 	size_t bar_size;
 	bool use_polling;
 	bool slow_fw;
+	size_t lmem_size;
 };
 
 /* gsc resources and definitions (HECI1 and HECI2) */
@@ -74,6 +131,7 @@ static const struct gsc_def gsc_def_dg2[] = {
 		.name = "mei-gsc",
 		.bar = DG2_GSC_HECI1_BASE,
 		.bar_size = GSC_BAR_LENGTH,
+		.lmem_size = SZ_4M,
 	},
 	{
 		.name = "mei-gscfi",
@@ -90,26 +148,33 @@ static void gsc_release_dev(struct device *dev)
 	kfree(adev);
 }
 
-static void gsc_destroy_one(struct intel_gsc_intf *intf)
+static void gsc_destroy_one(struct drm_i915_private *i915,
+				  struct intel_gsc *gsc, unsigned int intf_id)
 {
+	struct intel_gsc_intf *intf = &gsc->intf[intf_id];
+
 	if (intf->adev) {
 		auxiliary_device_delete(&intf->adev->aux_dev);
 		auxiliary_device_uninit(&intf->adev->aux_dev);
 		intf->adev = NULL;
 	}
+
 	if (intf->irq >= 0)
 		irq_free_desc(intf->irq);
 	intf->irq = -1;
+
+	gsc_ext_om_destroy(intf);
 }
 
 static void gsc_init_one(struct drm_i915_private *i915,
-			 struct intel_gsc_intf *intf,
-			 unsigned int intf_id)
+			       struct intel_gsc *gsc,
+			       unsigned int intf_id)
 {
 	struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
 	struct mei_aux_device *adev;
 	struct auxiliary_device *aux_dev;
 	const struct gsc_def *def;
+	struct intel_gsc_intf *intf = &gsc->intf[intf_id];
 	int ret;
 
 	intf->irq = -1;
@@ -141,7 +206,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
 	intf->irq = irq_alloc_desc(0);
 	if (intf->irq < 0) {
 		drm_err(&i915->drm, "gsc irq error %d\n", intf->irq);
-		return;
+		goto fail;
 	}
 
 	ret = gsc_irq_init(intf->irq);
@@ -155,6 +220,19 @@ static void gsc_init_one(struct drm_i915_private *i915,
 	if (!adev)
 		goto fail;
 
+	if (def->lmem_size) {
+		dev_dbg(&pdev->dev, "setting up GSC lmem\n");
+
+		if (gsc_ext_om_alloc(gsc, intf, def->lmem_size)) {
+			dev_err(&pdev->dev, "setting up gsc extended operational memory failed\n");
+			kfree(adev);
+			goto fail;
+		}
+
+		adev->ext_op_mem.start = i915_gem_object_get_dma_address(intf->gem_obj, 0);
+		adev->ext_op_mem.end = adev->ext_op_mem.start + def->lmem_size;
+	}
+
 	adev->irq = intf->irq;
 	adev->bar.parent = &pdev->resource[0];
 	adev->bar.start = def->bar + pdev->resource[0].start;
@@ -188,7 +266,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
 
 	return;
 fail:
-	gsc_destroy_one(intf);
+	gsc_destroy_one(i915, gsc, intf->id);
 }
 
 static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
@@ -229,7 +307,7 @@ void intel_gsc_init(struct intel_gsc *gsc, struct drm_i915_private *i915)
 		return;
 
 	for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
-		gsc_init_one(i915, &gsc->intf[i], i);
+		gsc_init_one(i915, gsc, i);
 }
 
 void intel_gsc_fini(struct intel_gsc *gsc)
@@ -241,5 +319,5 @@ void intel_gsc_fini(struct intel_gsc *gsc)
 		return;
 
 	for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
-		gsc_destroy_one(&gsc->intf[i]);
+		gsc_destroy_one(gt->i915, gsc, i);
 }
diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.h b/drivers/gpu/drm/i915/gt/intel_gsc.h
index 68582f912b21..fcac1775e9c3 100644
--- a/drivers/gpu/drm/i915/gt/intel_gsc.h
+++ b/drivers/gpu/drm/i915/gt/intel_gsc.h
@@ -20,11 +20,14 @@ struct mei_aux_device;
 
 /**
  * struct intel_gsc - graphics security controller
+ *
+ * @gem_obj: scratch memory GSC operations
  * @intf : gsc interface
  */
 struct intel_gsc {
 	struct intel_gsc_intf {
 		struct mei_aux_device *adev;
+		struct drm_i915_gem_object *gem_obj;
 		int irq;
 		unsigned int id;
 	} intf[INTEL_GSC_NUM_INTERFACES];
-- 
2.32.0

[Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for GSC support for XeHP SDV and DG2 platforms

[Patchwork]

== Series Details ==

Series: GSC support for XeHP SDV and DG2 platforms
URL   : https://patchwork.freedesktop.org/series/102339/
State : warning

== Summary ==

$ dim checkpatch origin/drm-tip
57df08911dad drm/i915/gsc: add gsc as a mei auxiliary device
-:65: WARNING:FILE_PATH_CHANGES: added, moved or deleted file(s), does MAINTAINERS need updating?
#65: 
new file mode 100644

-:459: CHECK:MACRO_ARG_REUSE: Macro argument reuse 'dev_priv' - possible side-effects?
#459: FILE: drivers/gpu/drm/i915/i915_drv.h:1316:
+#define HAS_HECI_GSC(dev_priv) (HAS_HECI_PXP(dev_priv) || HAS_HECI_GSCFI(dev_priv))

total: 0 errors, 1 warnings, 1 checks, 418 lines checked
cbe282748891 mei: add support for graphics system controller (gsc) devices
-:57: WARNING:FILE_PATH_CHANGES: added, moved or deleted file(s), does MAINTAINERS need updating?
#57: 
new file mode 100644

-:255: WARNING:MODULE_LICENSE: Prefer "GPL" over "GPL v2" - see commit bf7fbeeae6db ("module: Cure the MODULE_LICENSE "GPL" vs. "GPL v2" bogosity")
#255: FILE: drivers/misc/mei/gsc-me.c:194:
+MODULE_LICENSE("GPL v2");

total: 0 errors, 2 warnings, 0 checks, 297 lines checked
73727156241a mei: gsc: setup char driver alive in spite of firmware handshake failure
cf7d610b88d2 mei: gsc: add runtime pm handlers
3b921daf3d69 mei: gsc: retrieve the firmware version
7bf14c184625 HAX: drm/i915: force INTEL_MEI_GSC on for CI
79367081c714 drm/i915/gsc: skip irq initialization if using polling
e4627be07856 drm/i915/gsc: add slow_fw flag to the mei auxiliary device
c3a1f69fab81 drm/i915/gsc: add slow_fw flag to the gsc device definition
c8d254e0de12 drm/i915/gsc: add GSC XeHP SDV platform definition
7102bca609de mei: gsc: use polling instead of interrupts
ce5e1f8ea33d mei: gsc: wait for reset thread on stop
613f4221d396 mei: extend timeouts on slow devices.
c7ef5e1c508b drm/i915/dg2: add gsc with special gsc bar offsets
a289d7722c57 mei: bus: export common mkhi definitions into a separate header
-:78: WARNING:FILE_PATH_CHANGES: added, moved or deleted file(s), does MAINTAINERS need updating?
#78: 
new file mode 100644

total: 0 errors, 1 warnings, 0 checks, 101 lines checked
f767b7e3953f mei: mkhi: add memory ready command
-:46: CHECK:PREFER_KERNEL_TYPES: Prefer kernel type 'u32' over 'uint32_t'
#46: FILE: drivers/misc/mei/mkhi.h:54:
+	uint32_t flags;

total: 0 errors, 0 warnings, 1 checks, 29 lines checked
ed778c11fb2f mei: gsc: setup gsc extended operational memory
-:51: CHECK:UNNECESSARY_PARENTHESES: Unnecessary parentheses around 'cldev->bus->pxp_mode != MEI_DEV_PXP_INIT'
#51: FILE: drivers/misc/mei/bus-fixup.c:257:
+	if (!cldev->bus->fw_f_fw_ver_supported &&
+	    (cldev->bus->pxp_mode != MEI_DEV_PXP_INIT))

total: 0 errors, 0 warnings, 1 checks, 224 lines checked
0c7708f978ad mei: gsc: add transition to PXP mode in resume flow
d7761f03a774 mei: debugfs: add pxp mode to devstate in debugfs
-:19: ERROR:COMPLEX_MACRO: Macros with complex values should be enclosed in parentheses
#19: FILE: drivers/misc/mei/debugfs.c:91:
+#define MEI_PXP_MODE(state) case MEI_DEV_PXP_##state: return #state

total: 1 errors, 0 warnings, 0 checks, 29 lines checked
9f233cb0bb63 drm/i915/gsc: allocate extended operational memory in LMEM
-:109: CHECK:PARENTHESIS_ALIGNMENT: Alignment should match open parenthesis
#109: FILE: drivers/gpu/drm/i915/gt/intel_gsc.c:152:
+static void gsc_destroy_one(struct drm_i915_private *i915,
+				  struct intel_gsc *gsc, unsigned int intf_id)

total: 0 errors, 0 warnings, 1 checks, 181 lines checked

[Intel-gfx] ✗ Fi.CI.SPARSE: warning for GSC support for XeHP SDV and DG2 platforms

[Patchwork]

== Series Details ==

Series: GSC support for XeHP SDV and DG2 platforms
URL   : https://patchwork.freedesktop.org/series/102339/
State : warning

== Summary ==

$ dim sparse --fast origin/drm-tip
Sparse version: v0.6.2
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[Intel-gfx] ✗ Fi.CI.BAT: failure for GSC support for XeHP SDV and DG2 platforms

[Patchwork]

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== Series Details ==

Series: GSC support for XeHP SDV and DG2 platforms
URL   : https://patchwork.freedesktop.org/series/102339/
State : failure

== Summary ==

CI Bug Log - changes from CI_DRM_11472 -> Patchwork_22813
====================================================

Summary
-------

  **FAILURE**

  Serious unknown changes coming with Patchwork_22813 absolutely need to be
  verified manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in Patchwork_22813, please notify your bug team to allow them
  to document this new failure mode, which will reduce false positives in CI.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/index.html

Participating hosts (47 -> 45)
------------------------------

  Additional (3): bat-hsw-1 bat-rpls-2 bat-adlp-4 
  Missing    (5): shard-tglu fi-bsw-cyan fi-cfl-8109u fi-blb-e6850 fi-bdw-samus 

Possible new issues
-------------------

  Here are the unknown changes that may have been introduced in Patchwork_22813:

### IGT changes ###

#### Possible regressions ####

  * igt@kms_chamelium@dp-crc-fast:
    - bat-adlp-4:         NOTRUN -> [SKIP][1] +146 similar issues
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/bat-adlp-4/igt@kms_chamelium@dp-crc-fast.html

  
#### Warnings ####

  * igt@runner@aborted:
    - fi-rkl-11600:       [FAIL][2] ([i915#4312]) -> [FAIL][3]
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11472/fi-rkl-11600/igt@runner@aborted.html
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-rkl-11600/igt@runner@aborted.html
    - fi-kbl-7500u:       [FAIL][4] ([i915#4312]) -> [FAIL][5]
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11472/fi-kbl-7500u/igt@runner@aborted.html
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-kbl-7500u/igt@runner@aborted.html
    - fi-kbl-7567u:       [FAIL][6] ([i915#4312]) -> [FAIL][7]
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11472/fi-kbl-7567u/igt@runner@aborted.html
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-kbl-7567u/igt@runner@aborted.html
    - fi-skl-guc:         [FAIL][8] ([i915#4312] / [i915#5257]) -> [FAIL][9]
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11472/fi-skl-guc/igt@runner@aborted.html
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-skl-guc/igt@runner@aborted.html
    - fi-skl-6700k2:      [FAIL][10] ([i915#4312]) -> [FAIL][11]
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11472/fi-skl-6700k2/igt@runner@aborted.html
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-skl-6700k2/igt@runner@aborted.html

  
#### Suppressed ####

  The following results come from untrusted machines, tests, or statuses.
  They do not affect the overall result.

  * igt@gem_lmem_swapping@basic:
    - {bat-rpls-2}:       NOTRUN -> [SKIP][12] +146 similar issues
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/bat-rpls-2/igt@gem_lmem_swapping@basic.html
    - {bat-dg2-9}:        NOTRUN -> [SKIP][13]
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/bat-dg2-9/igt@gem_lmem_swapping@basic.html

  * igt@kms_cursor_legacy@basic-flip-after-cursor-atomic:
    - {bat-jsl-2}:        NOTRUN -> [SKIP][14] +146 similar issues
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/bat-jsl-2/igt@kms_cursor_legacy@basic-flip-after-cursor-atomic.html

  * igt@runner@aborted:
    - {bat-hsw-1}:        NOTRUN -> [FAIL][15]
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/bat-hsw-1/igt@runner@aborted.html

  
Known issues
------------

  Here are the changes found in Patchwork_22813 that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_close_race@basic-process:
    - fi-ivb-3770:        NOTRUN -> [SKIP][16] ([fdo#109271]) +146 similar issues
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-ivb-3770/igt@gem_close_race@basic-process.html

  * igt@gem_exec_fence@basic-await:
    - fi-bsw-nick:        NOTRUN -> [SKIP][17] ([fdo#109271]) +151 similar issues
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-bsw-nick/igt@gem_exec_fence@basic-await.html

  * igt@kms_flip@basic-flip-vs-dpms:
    - fi-kbl-soraka:      NOTRUN -> [SKIP][18] ([fdo#109271]) +146 similar issues
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-kbl-soraka/igt@kms_flip@basic-flip-vs-dpms.html

  * igt@kms_pipe_crc_basic@compare-crc-sanitycheck-pipe-c:
    - bat-adlp-4:         NOTRUN -> [SKIP][19] ([i915#5341])
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/bat-adlp-4/igt@kms_pipe_crc_basic@compare-crc-sanitycheck-pipe-c.html
    - fi-bsw-nick:        NOTRUN -> [SKIP][20] ([fdo#109271] / [i915#5341])
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-bsw-nick/igt@kms_pipe_crc_basic@compare-crc-sanitycheck-pipe-c.html
    - fi-kbl-soraka:      NOTRUN -> [SKIP][21] ([fdo#109271] / [i915#5341])
   [21]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-kbl-soraka/igt@kms_pipe_crc_basic@compare-crc-sanitycheck-pipe-c.html
    - fi-ivb-3770:        NOTRUN -> [SKIP][22] ([fdo#109271] / [i915#5341])
   [22]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-ivb-3770/igt@kms_pipe_crc_basic@compare-crc-sanitycheck-pipe-c.html

  * igt@runner@aborted:
    - bat-adlp-4:         NOTRUN -> [FAIL][23] ([i915#4312])
   [23]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/bat-adlp-4/igt@runner@aborted.html

  
#### Warnings ####

  * igt@runner@aborted:
    - fi-bsw-kefka:       [FAIL][24] ([i915#4312]) -> [FAIL][25] ([i915#3690] / [i915#4312])
   [24]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11472/fi-bsw-kefka/igt@runner@aborted.html
   [25]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-bsw-kefka/igt@runner@aborted.html
    - fi-bsw-nick:        [FAIL][26] ([i915#3690]) -> [FAIL][27] ([i915#3690] / [i915#4312])
   [26]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11472/fi-bsw-nick/igt@runner@aborted.html
   [27]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-bsw-nick/igt@runner@aborted.html
    - fi-kbl-soraka:      [FAIL][28] -> [FAIL][29] ([i915#4312])
   [28]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11472/fi-kbl-soraka/igt@runner@aborted.html
   [29]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-kbl-soraka/igt@runner@aborted.html
    - fi-hsw-4770:        [FAIL][30] ([i915#4312]) -> [FAIL][31] ([i915#4312] / [i915#5594])
   [30]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11472/fi-hsw-4770/igt@runner@aborted.html
   [31]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-hsw-4770/igt@runner@aborted.html
    - fi-ivb-3770:        [FAIL][32] -> [FAIL][33] ([i915#4312])
   [32]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11472/fi-ivb-3770/igt@runner@aborted.html
   [33]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-ivb-3770/igt@runner@aborted.html
    - fi-tgl-1115g4:      [FAIL][34] ([i915#4312] / [i915#5257]) -> [FAIL][35] ([i915#3690])
   [34]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11472/fi-tgl-1115g4/igt@runner@aborted.html
   [35]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-tgl-1115g4/igt@runner@aborted.html
    - fi-cfl-guc:         [FAIL][36] ([i915#4312]) -> [FAIL][37] ([i915#4312] / [i915#5257])
   [36]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11472/fi-cfl-guc/igt@runner@aborted.html
   [37]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/fi-cfl-guc/igt@runner@aborted.html

  
  {name}: This element is suppressed. This means it is ignored when computing
          the status of the difference (SUCCESS, WARNING, or FAILURE).

  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [i915#2575]: https://gitlab.freedesktop.org/drm/intel/issues/2575
  [i915#3690]: https://gitlab.freedesktop.org/drm/intel/issues/3690
  [i915#4312]: https://gitlab.freedesktop.org/drm/intel/issues/4312
  [i915#5171]: https://gitlab.freedesktop.org/drm/intel/issues/5171
  [i915#5174]: https://gitlab.freedesktop.org/drm/intel/issues/5174
  [i915#5190]: https://gitlab.freedesktop.org/drm/intel/issues/5190
  [i915#5257]: https://gitlab.freedesktop.org/drm/intel/issues/5257
  [i915#5341]: https://gitlab.freedesktop.org/drm/intel/issues/5341
  [i915#5594]: https://gitlab.freedesktop.org/drm/intel/issues/5594


Build changes
-------------

  * Linux: CI_DRM_11472 -> Patchwork_22813

  CI-20190529: 20190529
  CI_DRM_11472: 85882df13168c5f46b41401b96975de857e3ccac @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_6415: c3b690bd5f7fb1fb7ed786ab0f3b815930a6a55f @ https://gitlab.freedesktop.org/drm/igt-gpu-tools.git
  Patchwork_22813: 9f233cb0bb6312eed7a93dca2018f9db889158b6 @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

9f233cb0bb63 drm/i915/gsc: allocate extended operational memory in LMEM
d7761f03a774 mei: debugfs: add pxp mode to devstate in debugfs
0c7708f978ad mei: gsc: add transition to PXP mode in resume flow
ed778c11fb2f mei: gsc: setup gsc extended operational memory
f767b7e3953f mei: mkhi: add memory ready command
a289d7722c57 mei: bus: export common mkhi definitions into a separate header
c7ef5e1c508b drm/i915/dg2: add gsc with special gsc bar offsets
613f4221d396 mei: extend timeouts on slow devices.
ce5e1f8ea33d mei: gsc: wait for reset thread on stop
7102bca609de mei: gsc: use polling instead of interrupts
c8d254e0de12 drm/i915/gsc: add GSC XeHP SDV platform definition
c3a1f69fab81 drm/i915/gsc: add slow_fw flag to the gsc device definition
e4627be07856 drm/i915/gsc: add slow_fw flag to the mei auxiliary device
79367081c714 drm/i915/gsc: skip irq initialization if using polling
7bf14c184625 HAX: drm/i915: force INTEL_MEI_GSC on for CI
3b921daf3d69 mei: gsc: retrieve the firmware version
cf7d610b88d2 mei: gsc: add runtime pm handlers
73727156241a mei: gsc: setup char driver alive in spite of firmware handshake failure
cbe282748891 mei: add support for graphics system controller (gsc) devices
57df08911dad drm/i915/gsc: add gsc as a mei auxiliary device

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_22813/index.html

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Re: [Intel-gfx] [PATCH 20/20] drm/i915/gsc: allocate extended operational memory in LMEM

[Matthew Auld]

On Thu, 7 Apr 2022 at 14:00, Alexander Usyskin
<alexander.usyskin@intel.com> wrote:
>
> From: Tomas Winkler <tomas.winkler@intel.com>
>
> GSC requires more operational memory than available on chip.
> Reserve 4M of LMEM for GSC operation. The memory is provided to the
> GSC as struct resource to the auxiliary data of the child device.
>
> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
> Cc: Alan Previn <alan.previn.teres.alexis@intel.com>
> ---
>  drivers/gpu/drm/i915/gt/intel_gsc.c | 92 ++++++++++++++++++++++++++---
>  drivers/gpu/drm/i915/gt/intel_gsc.h |  3 +
>  2 files changed, 88 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
> index bfc307e49bf9..4d87519d5773 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gsc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
> @@ -7,6 +7,7 @@
>  #include <linux/mei_aux.h>
>  #include "i915_drv.h"
>  #include "i915_reg.h"
> +#include "gem/i915_gem_region.h"
>  #include "gt/intel_gsc.h"
>  #include "gt/intel_gt.h"
>
> @@ -36,12 +37,68 @@ static int gsc_irq_init(int irq)
>         return irq_set_chip_data(irq, NULL);
>  }
>
> +static int
> +gsc_ext_om_alloc(struct intel_gsc *gsc, struct intel_gsc_intf *intf, size_t size)
> +{
> +       struct intel_gt *gt = gsc_to_gt(gsc);
> +       struct drm_i915_gem_object *obj;
> +       void *vaddr;
> +       int err;
> +
> +       obj = i915_gem_object_create_lmem(gt->i915, size, I915_BO_ALLOC_CONTIGUOUS);
> +       if (IS_ERR(obj)) {
> +               drm_err(&gt->i915->drm, "Failed to allocate gsc memory\n");
> +               return PTR_ERR(obj);
> +       }
> +
> +       err = i915_gem_object_pin_pages_unlocked(obj);
> +       if (err) {
> +               drm_err(&gt->i915->drm, "Failed to pin pages for gsc memory\n");
> +               goto out_put;
> +       }
> +
> +       vaddr = i915_gem_object_pin_map_unlocked(obj, i915_coherent_map_type(gt->i915, obj, true));
> +       if (IS_ERR(vaddr)) {
> +               err = PTR_ERR(vaddr);
> +               drm_err(&gt->i915->drm, "Failed to map gsc memory\n");
> +               goto out_unpin;
> +       }
> +
> +       memset(vaddr, 0, obj->base.size);

We should be able to pass I915_BO_ALLOC_CPU_CLEAR to create_lmem,
which should do something like this for us, when later calling
pin_pages or similar.

> +
> +       i915_gem_object_unpin_map(obj);
> +
> +       intf->gem_obj = obj;
> +
> +       return 0;
> +
> +out_unpin:
> +       i915_gem_object_unpin_pages(obj);
> +out_put:
> +       i915_gem_object_put(obj);
> +       return err;
> +}
> +
> +static void gsc_ext_om_destroy(struct intel_gsc_intf *intf)
> +{
> +       struct drm_i915_gem_object *obj = fetch_and_zero(&intf->gem_obj);
> +
> +       if (!obj)
> +               return;
> +
> +       if (i915_gem_object_has_pinned_pages(obj))
> +               i915_gem_object_unpin_pages(obj);
> +
> +       i915_gem_object_put(obj);
> +}
> +
>  struct gsc_def {
>         const char *name;
>         unsigned long bar;
>         size_t bar_size;
>         bool use_polling;
>         bool slow_fw;
> +       size_t lmem_size;
>  };
>
>  /* gsc resources and definitions (HECI1 and HECI2) */
> @@ -74,6 +131,7 @@ static const struct gsc_def gsc_def_dg2[] = {
>                 .name = "mei-gsc",
>                 .bar = DG2_GSC_HECI1_BASE,
>                 .bar_size = GSC_BAR_LENGTH,
> +               .lmem_size = SZ_4M,
>         },
>         {
>                 .name = "mei-gscfi",
> @@ -90,26 +148,33 @@ static void gsc_release_dev(struct device *dev)
>         kfree(adev);
>  }
>
> -static void gsc_destroy_one(struct intel_gsc_intf *intf)
> +static void gsc_destroy_one(struct drm_i915_private *i915,
> +                                 struct intel_gsc *gsc, unsigned int intf_id)
>  {
> +       struct intel_gsc_intf *intf = &gsc->intf[intf_id];
> +
>         if (intf->adev) {
>                 auxiliary_device_delete(&intf->adev->aux_dev);
>                 auxiliary_device_uninit(&intf->adev->aux_dev);
>                 intf->adev = NULL;
>         }
> +
>         if (intf->irq >= 0)
>                 irq_free_desc(intf->irq);
>         intf->irq = -1;
> +
> +       gsc_ext_om_destroy(intf);
>  }
>
>  static void gsc_init_one(struct drm_i915_private *i915,
> -                        struct intel_gsc_intf *intf,
> -                        unsigned int intf_id)
> +                              struct intel_gsc *gsc,
> +                              unsigned int intf_id)
>  {
>         struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
>         struct mei_aux_device *adev;
>         struct auxiliary_device *aux_dev;
>         const struct gsc_def *def;
> +       struct intel_gsc_intf *intf = &gsc->intf[intf_id];
>         int ret;
>
>         intf->irq = -1;
> @@ -141,7 +206,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
>         intf->irq = irq_alloc_desc(0);
>         if (intf->irq < 0) {
>                 drm_err(&i915->drm, "gsc irq error %d\n", intf->irq);
> -               return;
> +               goto fail;
>         }
>
>         ret = gsc_irq_init(intf->irq);
> @@ -155,6 +220,19 @@ static void gsc_init_one(struct drm_i915_private *i915,
>         if (!adev)
>                 goto fail;
>
> +       if (def->lmem_size) {
> +               dev_dbg(&pdev->dev, "setting up GSC lmem\n");
> +
> +               if (gsc_ext_om_alloc(gsc, intf, def->lmem_size)) {
> +                       dev_err(&pdev->dev, "setting up gsc extended operational memory failed\n");
> +                       kfree(adev);
> +                       goto fail;
> +               }
> +
> +               adev->ext_op_mem.start = i915_gem_object_get_dma_address(intf->gem_obj, 0);
> +               adev->ext_op_mem.end = adev->ext_op_mem.start + def->lmem_size;
> +       }
> +
>         adev->irq = intf->irq;
>         adev->bar.parent = &pdev->resource[0];
>         adev->bar.start = def->bar + pdev->resource[0].start;
> @@ -188,7 +266,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
>
>         return;
>  fail:
> -       gsc_destroy_one(intf);
> +       gsc_destroy_one(i915, gsc, intf->id);
>  }
>
>  static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
> @@ -229,7 +307,7 @@ void intel_gsc_init(struct intel_gsc *gsc, struct drm_i915_private *i915)
>                 return;
>
>         for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
> -               gsc_init_one(i915, &gsc->intf[i], i);
> +               gsc_init_one(i915, gsc, i);
>  }
>
>  void intel_gsc_fini(struct intel_gsc *gsc)
> @@ -241,5 +319,5 @@ void intel_gsc_fini(struct intel_gsc *gsc)
>                 return;
>
>         for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
> -               gsc_destroy_one(&gsc->intf[i]);
> +               gsc_destroy_one(gt->i915, gsc, i);
>  }
> diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.h b/drivers/gpu/drm/i915/gt/intel_gsc.h
> index 68582f912b21..fcac1775e9c3 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gsc.h
> +++ b/drivers/gpu/drm/i915/gt/intel_gsc.h
> @@ -20,11 +20,14 @@ struct mei_aux_device;
>
>  /**
>   * struct intel_gsc - graphics security controller
> + *
> + * @gem_obj: scratch memory GSC operations
>   * @intf : gsc interface
>   */
>  struct intel_gsc {
>         struct intel_gsc_intf {
>                 struct mei_aux_device *adev;
> +               struct drm_i915_gem_object *gem_obj;
>                 int irq;
>                 unsigned int id;
>         } intf[INTEL_GSC_NUM_INTERFACES];
> --
> 2.32.0
>

Re: [Intel-gfx] [PATCH 20/20] drm/i915/gsc: allocate extended operational memory in LMEM

[Matthew Auld]

On Thu, 7 Apr 2022 at 14:00, Alexander Usyskin
<alexander.usyskin@intel.com> wrote:
>
> From: Tomas Winkler <tomas.winkler@intel.com>
>
> GSC requires more operational memory than available on chip.
> Reserve 4M of LMEM for GSC operation. The memory is provided to the
> GSC as struct resource to the auxiliary data of the child device.
>
> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
> Cc: Alan Previn <alan.previn.teres.alexis@intel.com>
> ---
>  drivers/gpu/drm/i915/gt/intel_gsc.c | 92 ++++++++++++++++++++++++++---
>  drivers/gpu/drm/i915/gt/intel_gsc.h |  3 +
>  2 files changed, 88 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
> index bfc307e49bf9..4d87519d5773 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gsc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
> @@ -7,6 +7,7 @@
>  #include <linux/mei_aux.h>
>  #include "i915_drv.h"
>  #include "i915_reg.h"
> +#include "gem/i915_gem_region.h"
>  #include "gt/intel_gsc.h"
>  #include "gt/intel_gt.h"
>
> @@ -36,12 +37,68 @@ static int gsc_irq_init(int irq)
>         return irq_set_chip_data(irq, NULL);
>  }
>
> +static int
> +gsc_ext_om_alloc(struct intel_gsc *gsc, struct intel_gsc_intf *intf, size_t size)
> +{
> +       struct intel_gt *gt = gsc_to_gt(gsc);
> +       struct drm_i915_gem_object *obj;
> +       void *vaddr;
> +       int err;
> +
> +       obj = i915_gem_object_create_lmem(gt->i915, size, I915_BO_ALLOC_CONTIGUOUS);
> +       if (IS_ERR(obj)) {
> +               drm_err(&gt->i915->drm, "Failed to allocate gsc memory\n");
> +               return PTR_ERR(obj);
> +       }
> +
> +       err = i915_gem_object_pin_pages_unlocked(obj);
> +       if (err) {
> +               drm_err(&gt->i915->drm, "Failed to pin pages for gsc memory\n");
> +               goto out_put;
> +       }
> +
> +       vaddr = i915_gem_object_pin_map_unlocked(obj, i915_coherent_map_type(gt->i915, obj, true));
> +       if (IS_ERR(vaddr)) {
> +               err = PTR_ERR(vaddr);
> +               drm_err(&gt->i915->drm, "Failed to map gsc memory\n");
> +               goto out_unpin;
> +       }
> +
> +       memset(vaddr, 0, obj->base.size);

We should be able to pass I915_BO_ALLOC_CPU_CLEAR to create_lmem,
which should do something like this for us, when later calling
pin_pages or similar.

> +
> +       i915_gem_object_unpin_map(obj);
> +
> +       intf->gem_obj = obj;
> +
> +       return 0;
> +
> +out_unpin:
> +       i915_gem_object_unpin_pages(obj);
> +out_put:
> +       i915_gem_object_put(obj);
> +       return err;
> +}
> +
> +static void gsc_ext_om_destroy(struct intel_gsc_intf *intf)
> +{
> +       struct drm_i915_gem_object *obj = fetch_and_zero(&intf->gem_obj);
> +
> +       if (!obj)
> +               return;
> +
> +       if (i915_gem_object_has_pinned_pages(obj))
> +               i915_gem_object_unpin_pages(obj);
> +
> +       i915_gem_object_put(obj);
> +}
> +
>  struct gsc_def {
>         const char *name;
>         unsigned long bar;
>         size_t bar_size;
>         bool use_polling;
>         bool slow_fw;
> +       size_t lmem_size;
>  };
>
>  /* gsc resources and definitions (HECI1 and HECI2) */
> @@ -74,6 +131,7 @@ static const struct gsc_def gsc_def_dg2[] = {
>                 .name = "mei-gsc",
>                 .bar = DG2_GSC_HECI1_BASE,
>                 .bar_size = GSC_BAR_LENGTH,
> +               .lmem_size = SZ_4M,
>         },
>         {
>                 .name = "mei-gscfi",
> @@ -90,26 +148,33 @@ static void gsc_release_dev(struct device *dev)
>         kfree(adev);
>  }
>
> -static void gsc_destroy_one(struct intel_gsc_intf *intf)
> +static void gsc_destroy_one(struct drm_i915_private *i915,
> +                                 struct intel_gsc *gsc, unsigned int intf_id)
>  {
> +       struct intel_gsc_intf *intf = &gsc->intf[intf_id];
> +
>         if (intf->adev) {
>                 auxiliary_device_delete(&intf->adev->aux_dev);
>                 auxiliary_device_uninit(&intf->adev->aux_dev);
>                 intf->adev = NULL;
>         }
> +
>         if (intf->irq >= 0)
>                 irq_free_desc(intf->irq);
>         intf->irq = -1;
> +
> +       gsc_ext_om_destroy(intf);
>  }
>
>  static void gsc_init_one(struct drm_i915_private *i915,
> -                        struct intel_gsc_intf *intf,
> -                        unsigned int intf_id)
> +                              struct intel_gsc *gsc,
> +                              unsigned int intf_id)
>  {
>         struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
>         struct mei_aux_device *adev;
>         struct auxiliary_device *aux_dev;
>         const struct gsc_def *def;
> +       struct intel_gsc_intf *intf = &gsc->intf[intf_id];
>         int ret;
>
>         intf->irq = -1;
> @@ -141,7 +206,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
>         intf->irq = irq_alloc_desc(0);
>         if (intf->irq < 0) {
>                 drm_err(&i915->drm, "gsc irq error %d\n", intf->irq);
> -               return;
> +               goto fail;
>         }
>
>         ret = gsc_irq_init(intf->irq);
> @@ -155,6 +220,19 @@ static void gsc_init_one(struct drm_i915_private *i915,
>         if (!adev)
>                 goto fail;
>
> +       if (def->lmem_size) {
> +               dev_dbg(&pdev->dev, "setting up GSC lmem\n");
> +
> +               if (gsc_ext_om_alloc(gsc, intf, def->lmem_size)) {
> +                       dev_err(&pdev->dev, "setting up gsc extended operational memory failed\n");
> +                       kfree(adev);
> +                       goto fail;
> +               }
> +
> +               adev->ext_op_mem.start = i915_gem_object_get_dma_address(intf->gem_obj, 0);
> +               adev->ext_op_mem.end = adev->ext_op_mem.start + def->lmem_size;
> +       }
> +
>         adev->irq = intf->irq;
>         adev->bar.parent = &pdev->resource[0];
>         adev->bar.start = def->bar + pdev->resource[0].start;
> @@ -188,7 +266,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
>
>         return;
>  fail:
> -       gsc_destroy_one(intf);
> +       gsc_destroy_one(i915, gsc, intf->id);
>  }
>
>  static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
> @@ -229,7 +307,7 @@ void intel_gsc_init(struct intel_gsc *gsc, struct drm_i915_private *i915)
>                 return;
>
>         for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
> -               gsc_init_one(i915, &gsc->intf[i], i);
> +               gsc_init_one(i915, gsc, i);
>  }
>
>  void intel_gsc_fini(struct intel_gsc *gsc)
> @@ -241,5 +319,5 @@ void intel_gsc_fini(struct intel_gsc *gsc)
>                 return;
>
>         for (i = 0; i < INTEL_GSC_NUM_INTERFACES; i++)
> -               gsc_destroy_one(&gsc->intf[i]);
> +               gsc_destroy_one(gt->i915, gsc, i);
>  }
> diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.h b/drivers/gpu/drm/i915/gt/intel_gsc.h
> index 68582f912b21..fcac1775e9c3 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gsc.h
> +++ b/drivers/gpu/drm/i915/gt/intel_gsc.h
> @@ -20,11 +20,14 @@ struct mei_aux_device;
>
>  /**
>   * struct intel_gsc - graphics security controller
> + *
> + * @gem_obj: scratch memory GSC operations
>   * @intf : gsc interface
>   */
>  struct intel_gsc {
>         struct intel_gsc_intf {
>                 struct mei_aux_device *adev;
> +               struct drm_i915_gem_object *gem_obj;
>                 int irq;
>                 unsigned int id;
>         } intf[INTEL_GSC_NUM_INTERFACES];
> --
> 2.32.0
>

Re: [Intel-gfx] [PATCH 07/20] drm/i915/gsc: skip irq initialization if using polling

[Ceraolo Spurio, Daniele]

On 4/7/2022 5:58 AM, Alexander Usyskin wrote:
> From: Vitaly Lubart <vitaly.lubart@intel.com>
>
> If we use polling instead of interrupts,
> irq initialization should be skipped.

This needs at least a 1 line explanation if why we might need to use 
polling. Something like "some platforms require the host to poll on the 
GSC reply instead of relaying on the interrupts. For those platforms, 
irq initialization should be skipped."

>
> Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
> ---
>   drivers/gpu/drm/i915/gt/intel_gsc.c | 10 +++++++---
>   1 file changed, 7 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
> index 21e860861f0b..280dba4fd32d 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gsc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
> @@ -40,6 +40,7 @@ struct gsc_def {
>   	const char *name;
>   	unsigned long bar;
>   	size_t bar_size;
> +	bool use_polling;
>   };
>   
>   /* gsc resources and definitions (HECI1 and HECI2) */
> @@ -97,6 +98,10 @@ static void gsc_init_one(struct drm_i915_private *i915,
>   		return;
>   	}
>   
> +	/* skip irq initialization */
> +	if (def->use_polling)
> +		goto add_device;

We tend to limit the use of gotos to the error paths, so I'd prefer it 
if this was flipped to avoid it, i.e.:

         if (!def->use_polling) {
                 /* set up irqs */
                 [...]
         }

But not a blocker. With the commit message updated:

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

Daniele

> +
>   	intf->irq = irq_alloc_desc(0);
>   	if (intf->irq < 0) {
>   		drm_err(&i915->drm, "gsc irq error %d\n", intf->irq);
> @@ -109,6 +114,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
>   		goto fail;
>   	}
>   
> +add_device:
>   	adev = kzalloc(sizeof(*adev), GFP_KERNEL);
>   	if (!adev)
>   		goto fail;
> @@ -162,10 +168,8 @@ static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
>   		return;
>   	}
>   
> -	if (gt->gsc.intf[intf_id].irq < 0) {
> -		drm_err_ratelimited(&gt->i915->drm, "GSC irq: irq not set");
> +	if (gt->gsc.intf[intf_id].irq < 0)
>   		return;
> -	}
>   
>   	ret = generic_handle_irq(gt->gsc.intf[intf_id].irq);
>   	if (ret)

Re: [Intel-gfx] [PATCH 07/20] drm/i915/gsc: skip irq initialization if using polling

[Ceraolo Spurio, Daniele]

On 4/7/2022 5:58 AM, Alexander Usyskin wrote:
> From: Vitaly Lubart <vitaly.lubart@intel.com>
>
> If we use polling instead of interrupts,
> irq initialization should be skipped.

This needs at least a 1 line explanation if why we might need to use 
polling. Something like "some platforms require the host to poll on the 
GSC reply instead of relaying on the interrupts. For those platforms, 
irq initialization should be skipped."

>
> Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
> ---
>   drivers/gpu/drm/i915/gt/intel_gsc.c | 10 +++++++---
>   1 file changed, 7 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
> index 21e860861f0b..280dba4fd32d 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gsc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
> @@ -40,6 +40,7 @@ struct gsc_def {
>   	const char *name;
>   	unsigned long bar;
>   	size_t bar_size;
> +	bool use_polling;
>   };
>   
>   /* gsc resources and definitions (HECI1 and HECI2) */
> @@ -97,6 +98,10 @@ static void gsc_init_one(struct drm_i915_private *i915,
>   		return;
>   	}
>   
> +	/* skip irq initialization */
> +	if (def->use_polling)
> +		goto add_device;

We tend to limit the use of gotos to the error paths, so I'd prefer it 
if this was flipped to avoid it, i.e.:

         if (!def->use_polling) {
                 /* set up irqs */
                 [...]
         }

But not a blocker. With the commit message updated:

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

Daniele

> +
>   	intf->irq = irq_alloc_desc(0);
>   	if (intf->irq < 0) {
>   		drm_err(&i915->drm, "gsc irq error %d\n", intf->irq);
> @@ -109,6 +114,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
>   		goto fail;
>   	}
>   
> +add_device:
>   	adev = kzalloc(sizeof(*adev), GFP_KERNEL);
>   	if (!adev)
>   		goto fail;
> @@ -162,10 +168,8 @@ static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
>   		return;
>   	}
>   
> -	if (gt->gsc.intf[intf_id].irq < 0) {
> -		drm_err_ratelimited(&gt->i915->drm, "GSC irq: irq not set");
> +	if (gt->gsc.intf[intf_id].irq < 0)
>   		return;
> -	}
>   
>   	ret = generic_handle_irq(gt->gsc.intf[intf_id].irq);
>   	if (ret)

Re: [Intel-gfx] [PATCH 08/20] drm/i915/gsc: add slow_fw flag to the mei auxiliary device

[Ceraolo Spurio, Daniele]

On 4/7/2022 5:58 AM, Alexander Usyskin wrote:
> Add slow_fw flag to the mei auxiliary device info
> to inform the mei driver about slow underlying firmware.
> Such firmware will require to use larger operation timeouts.
>
> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>

Might be worth squashing this in one of the patches that makes use of 
it, but I can see the benefit of having the interface added in a patch 
that's neither mei nor i915.

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

> ---
>   include/linux/mei_aux.h | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/include/linux/mei_aux.h b/include/linux/mei_aux.h
> index 587f25128848..a29f4064b9c0 100644
> --- a/include/linux/mei_aux.h
> +++ b/include/linux/mei_aux.h
> @@ -11,6 +11,7 @@ struct mei_aux_device {
>   	struct auxiliary_device aux_dev;
>   	int irq;
>   	struct resource bar;
> +	bool slow_fw;
>   };
>   
>   #define auxiliary_dev_to_mei_aux_dev(auxiliary_dev) \

Re: [Intel-gfx] [PATCH 08/20] drm/i915/gsc: add slow_fw flag to the mei auxiliary device

[Ceraolo Spurio, Daniele]

On 4/7/2022 5:58 AM, Alexander Usyskin wrote:
> Add slow_fw flag to the mei auxiliary device info
> to inform the mei driver about slow underlying firmware.
> Such firmware will require to use larger operation timeouts.
>
> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>

Might be worth squashing this in one of the patches that makes use of 
it, but I can see the benefit of having the interface added in a patch 
that's neither mei nor i915.

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

> ---
>   include/linux/mei_aux.h | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/include/linux/mei_aux.h b/include/linux/mei_aux.h
> index 587f25128848..a29f4064b9c0 100644
> --- a/include/linux/mei_aux.h
> +++ b/include/linux/mei_aux.h
> @@ -11,6 +11,7 @@ struct mei_aux_device {
>   	struct auxiliary_device aux_dev;
>   	int irq;
>   	struct resource bar;
> +	bool slow_fw;
>   };
>   
>   #define auxiliary_dev_to_mei_aux_dev(auxiliary_dev) \

Re: [Intel-gfx] [PATCH 09/20] drm/i915/gsc: add slow_fw flag to the gsc device definition

[Ceraolo Spurio, Daniele]

On 4/7/2022 5:58 AM, Alexander Usyskin wrote:
> Add slow_fw flag to the gsc device definition
> and pass it to mei auxiliary device.
>
> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

Daniele

> ---
>   drivers/gpu/drm/i915/gt/intel_gsc.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
> index 280dba4fd32d..175571c6f71d 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gsc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
> @@ -41,6 +41,7 @@ struct gsc_def {
>   	unsigned long bar;
>   	size_t bar_size;
>   	bool use_polling;
> +	bool slow_fw;
>   };
>   
>   /* gsc resources and definitions (HECI1 and HECI2) */
> @@ -125,6 +126,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
>   	adev->bar.end = adev->bar.start + def->bar_size - 1;
>   	adev->bar.flags = IORESOURCE_MEM;
>   	adev->bar.desc = IORES_DESC_NONE;
> +	adev->slow_fw = def->slow_fw;
>   
>   	aux_dev = &adev->aux_dev;
>   	aux_dev->name = def->name;

Re: [Intel-gfx] [PATCH 09/20] drm/i915/gsc: add slow_fw flag to the gsc device definition

[Ceraolo Spurio, Daniele]

On 4/7/2022 5:58 AM, Alexander Usyskin wrote:
> Add slow_fw flag to the gsc device definition
> and pass it to mei auxiliary device.
>
> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

Daniele

> ---
>   drivers/gpu/drm/i915/gt/intel_gsc.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
> index 280dba4fd32d..175571c6f71d 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gsc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
> @@ -41,6 +41,7 @@ struct gsc_def {
>   	unsigned long bar;
>   	size_t bar_size;
>   	bool use_polling;
> +	bool slow_fw;
>   };
>   
>   /* gsc resources and definitions (HECI1 and HECI2) */
> @@ -125,6 +126,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
>   	adev->bar.end = adev->bar.start + def->bar_size - 1;
>   	adev->bar.flags = IORESOURCE_MEM;
>   	adev->bar.desc = IORES_DESC_NONE;
> +	adev->slow_fw = def->slow_fw;
>   
>   	aux_dev = &adev->aux_dev;
>   	aux_dev->name = def->name;

Re: [Intel-gfx] [PATCH 14/20] drm/i915/dg2: add gsc with special gsc bar offsets

[Ceraolo Spurio, Daniele]

On 4/7/2022 5:58 AM, Alexander Usyskin wrote:
> From: Tomas Winkler <tomas.winkler@intel.com>
>
> DG2 uses different GSC offsets on memory bar
> and uses PXP head (HECI1).
>
> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

Daniele

> ---
>   drivers/gpu/drm/i915/gt/intel_gsc.c | 15 +++++++++++++++
>   drivers/gpu/drm/i915/i915_pci.c     |  1 +
>   drivers/gpu/drm/i915/i915_reg.h     |  2 ++
>   3 files changed, 18 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
> index ffe6716590f0..bfc307e49bf9 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gsc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
> @@ -69,6 +69,19 @@ static const struct gsc_def gsc_def_xehpsdv[] = {
>   	}
>   };
>   
> +static const struct gsc_def gsc_def_dg2[] = {
> +	{
> +		.name = "mei-gsc",
> +		.bar = DG2_GSC_HECI1_BASE,
> +		.bar_size = GSC_BAR_LENGTH,
> +	},
> +	{
> +		.name = "mei-gscfi",
> +		.bar = DG2_GSC_HECI2_BASE,
> +		.bar_size = GSC_BAR_LENGTH,
> +	}
> +};
> +
>   static void gsc_release_dev(struct device *dev)
>   {
>   	struct auxiliary_device *aux_dev = to_auxiliary_dev(dev);
> @@ -109,6 +122,8 @@ static void gsc_init_one(struct drm_i915_private *i915,
>   		def = &gsc_def_dg1[intf_id];
>   	} else if (IS_XEHPSDV(i915)) {
>   		def = &gsc_def_xehpsdv[intf_id];
> +	} else if (IS_DG2(i915)) {
> +		def = &gsc_def_dg2[intf_id];
>   	} else {
>   		drm_warn_once(&i915->drm, "Unknown platform\n");
>   		return;
> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
> index 06e6dad0d7f7..cb6dcc3f48f4 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -1051,6 +1051,7 @@ static const struct intel_device_info xehpsdv_info = {
>   	.has_4tile = 1, \
>   	.has_64k_pages = 1, \
>   	.has_guc_deprivilege = 1, \
> +	.has_heci_pxp = 1, \
>   	.needs_compact_pt = 1, \
>   	.platform_engine_mask = \
>   		BIT(RCS0) | BIT(BCS0) | \
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 1dd7b7de6002..efcfe32cd8eb 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -978,6 +978,8 @@
>   #define BLT_RING_BASE		0x22000
>   #define DG1_GSC_HECI1_BASE	0x00258000
>   #define DG1_GSC_HECI2_BASE	0x00259000
> +#define DG2_GSC_HECI1_BASE	0x00373000
> +#define DG2_GSC_HECI2_BASE	0x00374000
>   
>   
>   

Re: [Intel-gfx] [PATCH 14/20] drm/i915/dg2: add gsc with special gsc bar offsets

[Ceraolo Spurio, Daniele]

On 4/7/2022 5:58 AM, Alexander Usyskin wrote:
> From: Tomas Winkler <tomas.winkler@intel.com>
>
> DG2 uses different GSC offsets on memory bar
> and uses PXP head (HECI1).
>
> Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>

Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

Daniele

> ---
>   drivers/gpu/drm/i915/gt/intel_gsc.c | 15 +++++++++++++++
>   drivers/gpu/drm/i915/i915_pci.c     |  1 +
>   drivers/gpu/drm/i915/i915_reg.h     |  2 ++
>   3 files changed, 18 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gsc.c b/drivers/gpu/drm/i915/gt/intel_gsc.c
> index ffe6716590f0..bfc307e49bf9 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gsc.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gsc.c
> @@ -69,6 +69,19 @@ static const struct gsc_def gsc_def_xehpsdv[] = {
>   	}
>   };
>   
> +static const struct gsc_def gsc_def_dg2[] = {
> +	{
> +		.name = "mei-gsc",
> +		.bar = DG2_GSC_HECI1_BASE,
> +		.bar_size = GSC_BAR_LENGTH,
> +	},
> +	{
> +		.name = "mei-gscfi",
> +		.bar = DG2_GSC_HECI2_BASE,
> +		.bar_size = GSC_BAR_LENGTH,
> +	}
> +};
> +
>   static void gsc_release_dev(struct device *dev)
>   {
>   	struct auxiliary_device *aux_dev = to_auxiliary_dev(dev);
> @@ -109,6 +122,8 @@ static void gsc_init_one(struct drm_i915_private *i915,
>   		def = &gsc_def_dg1[intf_id];
>   	} else if (IS_XEHPSDV(i915)) {
>   		def = &gsc_def_xehpsdv[intf_id];
> +	} else if (IS_DG2(i915)) {
> +		def = &gsc_def_dg2[intf_id];
>   	} else {
>   		drm_warn_once(&i915->drm, "Unknown platform\n");
>   		return;
> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
> index 06e6dad0d7f7..cb6dcc3f48f4 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -1051,6 +1051,7 @@ static const struct intel_device_info xehpsdv_info = {
>   	.has_4tile = 1, \
>   	.has_64k_pages = 1, \
>   	.has_guc_deprivilege = 1, \
> +	.has_heci_pxp = 1, \
>   	.needs_compact_pt = 1, \
>   	.platform_engine_mask = \
>   		BIT(RCS0) | BIT(BCS0) | \
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 1dd7b7de6002..efcfe32cd8eb 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -978,6 +978,8 @@
>   #define BLT_RING_BASE		0x22000
>   #define DG1_GSC_HECI1_BASE	0x00258000
>   #define DG1_GSC_HECI2_BASE	0x00259000
> +#define DG2_GSC_HECI1_BASE	0x00373000
> +#define DG2_GSC_HECI2_BASE	0x00374000
>   
>   
>