Merge "msm: kgsl: Keep postamble packets in a privileged buffer" (388cd19a) · Commits · e / devices / android_kernel_fairphone_FP4

drivers/gpu/msm/adreno.h

+1 −4

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0-only */
		/*
		* Copyright (c) 2008-2021, The Linux Foundation. All rights reserved.
		* Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
		* Copyright (c) 2022-2023, Qualcomm Innovation Center, Inc. All rights reserved.
		*/
		#ifndef __ADRENO_H
		#define __ADRENO_H
		@@ -16,9 +16,6 @@
		#define DEVICE_3D_NAME "kgsl-3d"
		#define DEVICE_3D0_NAME "kgsl-3d0"

		/* Index to preemption scratch buffer to store KMD postamble */
		#define KMD_POSTAMBLE_IDX 100

		/* ADRENO_DEVICE - Given a kgsl_device return the adreno device struct */
		#define ADRENO_DEVICE(device) \
		container_of(device, struct adreno_device, dev)

drivers/gpu/msm/adreno_a6xx_preempt.c

+14 −11

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-only
		/*
		* Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
		* Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
		* Copyright (c) 2022-2023, Qualcomm Innovation Center, Inc. All rights reserved.
		*/

		#include "adreno.h"
		@@ -558,8 +558,8 @@ unsigned int a6xx_preemption_pre_ibsubmit(
		* preemption
		*/
		if (!adreno_dev->perfcounter) {
		u64 kmd_postamble_addr =
		PREEMPT_SCRATCH_ADDR(adreno_dev, KMD_POSTAMBLE_IDX);
		u64 kmd_postamble_addr = SCRATCH_POSTAMBLE_ADDR
		(KGSL_DEVICE(adreno_dev));

		*cmds++ = cp_type7_packet(CP_SET_AMBLE, 3);
		*cmds++ = lower_32_bits(kmd_postamble_addr);
		@@ -763,6 +763,8 @@ void a6xx_preemption_close(struct adreno_device *adreno_dev)

		int a6xx_preemption_init(struct adreno_device *adreno_dev)
		{
		u32 flags = ADRENO_FEATURE(adreno_dev, ADRENO_APRIV) ?
		KGSL_MEMDESC_PRIVILEGED : 0;
		struct kgsl_device *device = KGSL_DEVICE(adreno_dev);
		struct adreno_preemption *preempt = &adreno_dev->preempt;
		struct adreno_ringbuffer *rb;
		@@ -777,8 +779,8 @@ int a6xx_preemption_init(struct adreno_device *adreno_dev)

		timer_setup(&preempt->timer, _a6xx_preemption_timer, 0);

		ret = kgsl_allocate_global(device, &preempt->scratch, PAGE_SIZE, 0, 0,
		"preemption_scratch");
		ret = kgsl_allocate_global(device, &preempt->scratch, PAGE_SIZE, 0,
		flags, "preemption_scratch");

		/* Allocate mem for storing preemption switch record */
		FOR_EACH_RINGBUFFER(adreno_dev, rb, i) {
		@@ -788,14 +790,15 @@ int a6xx_preemption_init(struct adreno_device *adreno_dev)
		}

		/*
		* First 8 dwords of the preemption scratch buffer is used to store the
		* address for CP to save/restore VPC data. Reserve 11 dwords in the
		* preemption scratch buffer from index KMD_POSTAMBLE_IDX for KMD
		* postamble pm4 packets
		* First 28 dwords of the device scratch buffer are used to store
		* shadow rb data. Reserve 11 dwords in the device scratch buffer
		* from SCRATCH_POSTAMBLE_OFFSET for KMD postamble pm4 packets.
		* This should be in device->scratch so that userspace cannot
		* access it.
		*/
		if (!adreno_dev->perfcounter) {
		u32 *postamble = preempt->scratch.hostptr +
		(KMD_POSTAMBLE_IDX * sizeof(u64));
		u32 *postamble = device->scratch.hostptr +
		SCRATCH_POSTAMBLE_OFFSET;
		u32 count = 0;

		postamble[count++] = cp_type7_packet(CP_REG_RMW, 3);

drivers/gpu/msm/kgsl.h

+6 −0

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0-only */
		/*
		* Copyright (c) 2008-2021, The Linux Foundation. All rights reserved.
		* Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
		*/
		#ifndef __KGSL_H
		#define __KGSL_H
		@@ -69,6 +70,11 @@
		#define SCRATCH_RPTR_GPU_ADDR(dev, id) \
		((dev)->scratch.gpuaddr + SCRATCH_RPTR_OFFSET(id))

		/* OFFSET to KMD postamble packets in scratch buffer */
		#define SCRATCH_POSTAMBLE_OFFSET (100 * sizeof(u64))
		#define SCRATCH_POSTAMBLE_ADDR(dev) \
		((dev)->scratch.gpuaddr + SCRATCH_POSTAMBLE_OFFSET)

		/* Timestamp window used to detect rollovers (half of integer range) */
		#define KGSL_TIMESTAMP_WINDOW 0x80000000