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linux-7.2.3/drivers/gpu/drm/nouveau/nvkm/subdev/fault/Kbuild

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: MIT
+nvkm-y += nvkm/subdev/fault/base.o
+nvkm-y += nvkm/subdev/fault/user.o
+nvkm-y += nvkm/subdev/fault/gp100.o
+nvkm-y += nvkm/subdev/fault/gp10b.o
+nvkm-y += nvkm/subdev/fault/gv100.o
+nvkm-y += nvkm/subdev/fault/tu102.o

linux-7.2.3/drivers/gpu/drm/nouveau/nvkm/subdev/fault/base.c

@@ -0,0 +1,166 @@
+/*
+ * Copyright 2018 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "priv.h"
+
+#include <core/memory.h>
+
+static void
+nvkm_fault_ntfy_fini(struct nvkm_event *event, int type, int index)
+{
+	struct nvkm_fault *fault = container_of(event, typeof(*fault), event);
+	fault->func->buffer.intr(fault->buffer[index], false);
+}
+
+static void
+nvkm_fault_ntfy_init(struct nvkm_event *event, int type, int index)
+{
+	struct nvkm_fault *fault = container_of(event, typeof(*fault), event);
+	fault->func->buffer.intr(fault->buffer[index], true);
+}
+
+static const struct nvkm_event_func
+nvkm_fault_ntfy = {
+	.init = nvkm_fault_ntfy_init,
+	.fini = nvkm_fault_ntfy_fini,
+};
+
+static void
+nvkm_fault_intr(struct nvkm_subdev *subdev)
+{
+	struct nvkm_fault *fault = nvkm_fault(subdev);
+	return fault->func->intr(fault);
+}
+
+static int
+nvkm_fault_fini(struct nvkm_subdev *subdev, enum nvkm_suspend_state suspend)
+{
+	struct nvkm_fault *fault = nvkm_fault(subdev);
+	if (fault->func->fini)
+		fault->func->fini(fault);
+	return 0;
+}
+
+static int
+nvkm_fault_init(struct nvkm_subdev *subdev)
+{
+	struct nvkm_fault *fault = nvkm_fault(subdev);
+	if (fault->func->init)
+		fault->func->init(fault);
+	return 0;
+}
+
+static int
+nvkm_fault_oneinit_buffer(struct nvkm_fault *fault, int id)
+{
+	struct nvkm_subdev *subdev = &fault->subdev;
+	struct nvkm_device *device = subdev->device;
+	struct nvkm_fault_buffer *buffer;
+	int ret;
+
+	if (!(buffer = kzalloc_obj(*buffer)))
+		return -ENOMEM;
+	buffer->fault = fault;
+	buffer->id = id;
+	fault->func->buffer.info(buffer);
+	fault->buffer[id] = buffer;
+
+	nvkm_debug(subdev, "buffer %d: %d entries\n", id, buffer->entries);
+
+	ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST, buffer->entries *
+			      fault->func->buffer.entry_size, 0x1000, true,
+			      &buffer->mem);
+	if (ret)
+		return ret;
+
+	/* Pin fault buffer in BAR2. */
+	buffer->addr = fault->func->buffer.pin(buffer);
+	if (buffer->addr == ~0ULL)
+		return -EFAULT;
+
+	return 0;
+}
+
+static int
+nvkm_fault_oneinit(struct nvkm_subdev *subdev)
+{
+	struct nvkm_fault *fault = nvkm_fault(subdev);
+	int ret, i;
+
+	for (i = 0; i < ARRAY_SIZE(fault->buffer); i++) {
+		if (i < fault->func->buffer.nr) {
+			ret = nvkm_fault_oneinit_buffer(fault, i);
+			if (ret)
+				return ret;
+			fault->buffer_nr = i + 1;
+		}
+	}
+
+	ret = nvkm_event_init(&nvkm_fault_ntfy, subdev, 1, fault->buffer_nr, &fault->event);
+	if (ret)
+		return ret;
+
+	if (fault->func->oneinit)
+		ret = fault->func->oneinit(fault);
+	return ret;
+}
+
+static void *
+nvkm_fault_dtor(struct nvkm_subdev *subdev)
+{
+	struct nvkm_fault *fault = nvkm_fault(subdev);
+	int i;
+
+	nvkm_event_ntfy_del(&fault->nrpfb);
+	nvkm_event_fini(&fault->event);
+
+	for (i = 0; i < fault->buffer_nr; i++) {
+		if (fault->buffer[i]) {
+			nvkm_memory_unref(&fault->buffer[i]->mem);
+			kfree(fault->buffer[i]);
+		}
+	}
+
+	return fault;
+}
+
+static const struct nvkm_subdev_func
+nvkm_fault = {
+	.dtor = nvkm_fault_dtor,
+	.oneinit = nvkm_fault_oneinit,
+	.init = nvkm_fault_init,
+	.fini = nvkm_fault_fini,
+	.intr = nvkm_fault_intr,
+};
+
+int
+nvkm_fault_new_(const struct nvkm_fault_func *func, struct nvkm_device *device,
+		enum nvkm_subdev_type type, int inst, struct nvkm_fault **pfault)
+{
+	struct nvkm_fault *fault;
+	if (!(fault = *pfault = kzalloc_obj(*fault)))
+		return -ENOMEM;
+	nvkm_subdev_ctor(&nvkm_fault, device, type, inst, &fault->subdev);
+	fault->func = func;
+	fault->user.ctor = nvkm_ufault_new;
+	fault->user.base = func->user.base;
+	return 0;
+}

linux-7.2.3/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gp100.c

@@ -0,0 +1,89 @@
+/*
+ * Copyright 2018 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "priv.h"
+
+#include <core/memory.h>
+#include <subdev/mc.h>
+
+#include <nvif/class.h>
+
+void
+gp100_fault_buffer_intr(struct nvkm_fault_buffer *buffer, bool enable)
+{
+	struct nvkm_device *device = buffer->fault->subdev.device;
+	nvkm_mc_intr_mask(device, NVKM_SUBDEV_FAULT, 0, enable);
+}
+
+void
+gp100_fault_buffer_fini(struct nvkm_fault_buffer *buffer)
+{
+	struct nvkm_device *device = buffer->fault->subdev.device;
+	nvkm_mask(device, 0x002a70, 0x00000001, 0x00000000);
+}
+
+void
+gp100_fault_buffer_init(struct nvkm_fault_buffer *buffer)
+{
+	struct nvkm_device *device = buffer->fault->subdev.device;
+	nvkm_wr32(device, 0x002a74, upper_32_bits(buffer->addr));
+	nvkm_wr32(device, 0x002a70, lower_32_bits(buffer->addr));
+	nvkm_mask(device, 0x002a70, 0x00000001, 0x00000001);
+}
+
+u64 gp100_fault_buffer_pin(struct nvkm_fault_buffer *buffer)
+{
+	return nvkm_memory_bar2(buffer->mem);
+}
+
+void
+gp100_fault_buffer_info(struct nvkm_fault_buffer *buffer)
+{
+	buffer->entries = nvkm_rd32(buffer->fault->subdev.device, 0x002a78);
+	buffer->get = 0x002a7c;
+	buffer->put = 0x002a80;
+}
+
+void
+gp100_fault_intr(struct nvkm_fault *fault)
+{
+	nvkm_event_ntfy(&fault->event, 0, NVKM_FAULT_BUFFER_EVENT_PENDING);
+}
+
+static const struct nvkm_fault_func
+gp100_fault = {
+	.intr = gp100_fault_intr,
+	.buffer.nr = 1,
+	.buffer.entry_size = 32,
+	.buffer.info = gp100_fault_buffer_info,
+	.buffer.pin = gp100_fault_buffer_pin,
+	.buffer.init = gp100_fault_buffer_init,
+	.buffer.fini = gp100_fault_buffer_fini,
+	.buffer.intr = gp100_fault_buffer_intr,
+	.user = { { 0, 0, MAXWELL_FAULT_BUFFER_A }, 0 },
+};
+
+int
+gp100_fault_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
+		struct nvkm_fault **pfault)
+{
+	return nvkm_fault_new_(&gp100_fault, device, type, inst, pfault);
+}

linux-7.2.3/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gp10b.c

@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2019 NVIDIA Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "priv.h"
+
+#include <core/memory.h>
+
+#include <nvif/class.h>
+
+u64
+gp10b_fault_buffer_pin(struct nvkm_fault_buffer *buffer)
+{
+	return nvkm_memory_addr(buffer->mem);
+}
+
+static const struct nvkm_fault_func
+gp10b_fault = {
+	.intr = gp100_fault_intr,
+	.buffer.nr = 1,
+	.buffer.entry_size = 32,
+	.buffer.info = gp100_fault_buffer_info,
+	.buffer.pin = gp10b_fault_buffer_pin,
+	.buffer.init = gp100_fault_buffer_init,
+	.buffer.fini = gp100_fault_buffer_fini,
+	.buffer.intr = gp100_fault_buffer_intr,
+	.user = { { 0, 0, MAXWELL_FAULT_BUFFER_A }, 0 },
+};
+
+int
+gp10b_fault_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
+		struct nvkm_fault **pfault)
+{
+	return nvkm_fault_new_(&gp10b_fault, device, type, inst, pfault);
+}

linux-7.2.3/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gv100.c

@@ -0,0 +1,246 @@
+/*
+ * Copyright 2018 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "priv.h"
+
+#include <core/memory.h>
+#include <subdev/mmu.h>
+#include <engine/fifo.h>
+
+#include <nvif/class.h>
+
+void
+gv100_fault_buffer_process(struct work_struct *work)
+{
+	struct nvkm_fault *fault = container_of(work, typeof(*fault), nrpfb_work);
+	struct nvkm_fault_buffer *buffer = fault->buffer[0];
+	struct nvkm_device *device = fault->subdev.device;
+	struct nvkm_memory *mem = buffer->mem;
+	u32 get = nvkm_rd32(device, buffer->get);
+	u32 put = nvkm_rd32(device, buffer->put);
+	if (put == get)
+		return;
+
+	nvkm_kmap(mem);
+	while (get != put) {
+		const u32   base = get * buffer->fault->func->buffer.entry_size;
+		const u32 instlo = nvkm_ro32(mem, base + 0x00);
+		const u32 insthi = nvkm_ro32(mem, base + 0x04);
+		const u32 addrlo = nvkm_ro32(mem, base + 0x08);
+		const u32 addrhi = nvkm_ro32(mem, base + 0x0c);
+		const u32 timelo = nvkm_ro32(mem, base + 0x10);
+		const u32 timehi = nvkm_ro32(mem, base + 0x14);
+		const u32  info0 = nvkm_ro32(mem, base + 0x18);
+		const u32  info1 = nvkm_ro32(mem, base + 0x1c);
+		struct nvkm_fault_data info;
+
+		if (++get == buffer->entries)
+			get = 0;
+		nvkm_wr32(device, buffer->get, get);
+
+		info.addr   = ((u64)addrhi << 32) | addrlo;
+		info.inst   = ((u64)insthi << 32) | instlo;
+		info.time   = ((u64)timehi << 32) | timelo;
+		info.engine = (info0 & 0x000000ff);
+		info.valid  = (info1 & 0x80000000) >> 31;
+		info.gpc    = (info1 & 0x1f000000) >> 24;
+		info.hub    = (info1 & 0x00100000) >> 20;
+		info.access = (info1 & 0x000f0000) >> 16;
+		info.client = (info1 & 0x00007f00) >> 8;
+		info.reason = (info1 & 0x0000001f);
+
+		nvkm_fifo_fault(device->fifo, &info);
+	}
+	nvkm_done(mem);
+}
+
+static void
+gv100_fault_buffer_intr(struct nvkm_fault_buffer *buffer, bool enable)
+{
+	struct nvkm_device *device = buffer->fault->subdev.device;
+	const u32 intr = buffer->id ? 0x08000000 : 0x20000000;
+	if (enable)
+		nvkm_mask(device, 0x100a2c, intr, intr);
+	else
+		nvkm_mask(device, 0x100a34, intr, intr);
+}
+
+static void
+gv100_fault_buffer_fini(struct nvkm_fault_buffer *buffer)
+{
+	struct nvkm_device *device = buffer->fault->subdev.device;
+	const u32 foff = buffer->id * 0x14;
+	nvkm_mask(device, 0x100e34 + foff, 0x80000000, 0x00000000);
+}
+
+static void
+gv100_fault_buffer_init(struct nvkm_fault_buffer *buffer)
+{
+	struct nvkm_device *device = buffer->fault->subdev.device;
+	const u32 foff = buffer->id * 0x14;
+
+	nvkm_mask(device, 0x100e34 + foff, 0xc0000000, 0x40000000);
+	nvkm_wr32(device, 0x100e28 + foff, upper_32_bits(buffer->addr));
+	nvkm_wr32(device, 0x100e24 + foff, lower_32_bits(buffer->addr));
+	nvkm_mask(device, 0x100e34 + foff, 0x80000000, 0x80000000);
+}
+
+static void
+gv100_fault_buffer_info(struct nvkm_fault_buffer *buffer)
+{
+	struct nvkm_device *device = buffer->fault->subdev.device;
+	const u32 foff = buffer->id * 0x14;
+
+	nvkm_mask(device, 0x100e34 + foff, 0x40000000, 0x40000000);
+
+	buffer->entries = nvkm_rd32(device, 0x100e34 + foff) & 0x000fffff;
+	buffer->get = 0x100e2c + foff;
+	buffer->put = 0x100e30 + foff;
+}
+
+static int
+gv100_fault_ntfy_nrpfb(struct nvkm_event_ntfy *ntfy, u32 bits)
+{
+	struct nvkm_fault *fault = container_of(ntfy, typeof(*fault), nrpfb);
+
+	schedule_work(&fault->nrpfb_work);
+	return NVKM_EVENT_KEEP;
+}
+
+static void
+gv100_fault_intr_fault(struct nvkm_fault *fault)
+{
+	struct nvkm_subdev *subdev = &fault->subdev;
+	struct nvkm_device *device = subdev->device;
+	struct nvkm_fault_data info;
+	const u32 addrlo = nvkm_rd32(device, 0x100e4c);
+	const u32 addrhi = nvkm_rd32(device, 0x100e50);
+	const u32  info0 = nvkm_rd32(device, 0x100e54);
+	const u32 insthi = nvkm_rd32(device, 0x100e58);
+	const u32  info1 = nvkm_rd32(device, 0x100e5c);
+
+	info.addr = ((u64)addrhi << 32) | addrlo;
+	info.inst = ((u64)insthi << 32) | (info0 & 0xfffff000);
+	info.time = 0;
+	info.engine = (info0 & 0x000000ff);
+	info.valid  = (info1 & 0x80000000) >> 31;
+	info.gpc    = (info1 & 0x1f000000) >> 24;
+	info.hub    = (info1 & 0x00100000) >> 20;
+	info.access = (info1 & 0x000f0000) >> 16;
+	info.client = (info1 & 0x00007f00) >> 8;
+	info.reason = (info1 & 0x0000001f);
+
+	nvkm_fifo_fault(device->fifo, &info);
+}
+
+static void
+gv100_fault_intr(struct nvkm_fault *fault)
+{
+	struct nvkm_subdev *subdev = &fault->subdev;
+	struct nvkm_device *device = subdev->device;
+	u32 stat = nvkm_rd32(device, 0x100a20);
+
+	if (stat & 0x80000000) {
+		gv100_fault_intr_fault(fault);
+		nvkm_wr32(device, 0x100e60, 0x80000000);
+		stat &= ~0x80000000;
+	}
+
+	if (stat & 0x20000000) {
+		if (fault->buffer[0]) {
+			nvkm_event_ntfy(&fault->event, 0, NVKM_FAULT_BUFFER_EVENT_PENDING);
+			stat &= ~0x20000000;
+		}
+	}
+
+	if (stat & 0x08000000) {
+		if (fault->buffer[1]) {
+			nvkm_event_ntfy(&fault->event, 1, NVKM_FAULT_BUFFER_EVENT_PENDING);
+			stat &= ~0x08000000;
+		}
+	}
+
+	if (stat) {
+		nvkm_debug(subdev, "intr %08x\n", stat);
+	}
+}
+
+static void
+gv100_fault_fini(struct nvkm_fault *fault)
+{
+	nvkm_event_ntfy_block(&fault->nrpfb);
+	flush_work(&fault->nrpfb_work);
+
+	if (fault->buffer[0])
+		fault->func->buffer.fini(fault->buffer[0]);
+
+	nvkm_mask(fault->subdev.device, 0x100a34, 0x80000000, 0x80000000);
+}
+
+static void
+gv100_fault_init(struct nvkm_fault *fault)
+{
+	nvkm_mask(fault->subdev.device, 0x100a2c, 0x80000000, 0x80000000);
+	fault->func->buffer.init(fault->buffer[0]);
+	nvkm_event_ntfy_allow(&fault->nrpfb);
+}
+
+int
+gv100_fault_oneinit(struct nvkm_fault *fault)
+{
+	nvkm_event_ntfy_add(&fault->event, 0, NVKM_FAULT_BUFFER_EVENT_PENDING, true,
+			    gv100_fault_ntfy_nrpfb, &fault->nrpfb);
+	return 0;
+}
+
+static const struct nvkm_fault_func
+gv100_fault = {
+	.oneinit = gv100_fault_oneinit,
+	.init = gv100_fault_init,
+	.fini = gv100_fault_fini,
+	.intr = gv100_fault_intr,
+	.buffer.nr = 2,
+	.buffer.entry_size = 32,
+	.buffer.info = gv100_fault_buffer_info,
+	.buffer.pin = gp100_fault_buffer_pin,
+	.buffer.init = gv100_fault_buffer_init,
+	.buffer.fini = gv100_fault_buffer_fini,
+	.buffer.intr = gv100_fault_buffer_intr,
+	/*TODO: Figure out how to expose non-replayable fault buffer, which,
+	 *      for some reason, is where recoverable CE faults appear...
+	 *
+	 * 	It's a bit tricky, as both NVKM and SVM will need access to
+	 * 	the non-replayable fault buffer.
+	 */
+	.user = { { 0, 0, VOLTA_FAULT_BUFFER_A }, 1 },
+};
+
+int
+gv100_fault_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
+		struct nvkm_fault **pfault)
+{
+	int ret = nvkm_fault_new_(&gv100_fault, device, type, inst, pfault);
+	if (ret)
+		return ret;
+
+	INIT_WORK(&(*pfault)->nrpfb_work, gv100_fault_buffer_process);
+	return 0;
+}

linux-7.2.3/drivers/gpu/drm/nouveau/nvkm/subdev/fault/priv.h

@@ -0,0 +1,60 @@
+#ifndef __NVKM_FAULT_PRIV_H__
+#define __NVKM_FAULT_PRIV_H__
+#define nvkm_fault_buffer(p) container_of((p), struct nvkm_fault_buffer, object)
+#define nvkm_fault(p) container_of((p), struct nvkm_fault, subdev)
+#include <subdev/fault.h>
+
+#include <core/event.h>
+#include <core/object.h>
+
+struct nvkm_fault_buffer {
+	struct nvkm_object object;
+	struct nvkm_fault *fault;
+	int id;
+	int entries;
+	u32 get;
+	u32 put;
+	struct nvkm_memory *mem;
+	u64 addr;
+
+	struct nvkm_inth inth;
+};
+
+int nvkm_fault_new_(const struct nvkm_fault_func *, struct nvkm_device *, enum nvkm_subdev_type,
+		    int inst, struct nvkm_fault **);
+
+struct nvkm_fault_func {
+	int (*oneinit)(struct nvkm_fault *);
+	void (*init)(struct nvkm_fault *);
+	void (*fini)(struct nvkm_fault *);
+	void (*intr)(struct nvkm_fault *);
+	struct {
+		int nr;
+		u32 entry_size;
+		void (*info)(struct nvkm_fault_buffer *);
+		u64 (*pin)(struct nvkm_fault_buffer *);
+		void (*init)(struct nvkm_fault_buffer *);
+		void (*fini)(struct nvkm_fault_buffer *);
+		void (*intr)(struct nvkm_fault_buffer *, bool enable);
+	} buffer;
+	struct {
+		struct nvkm_sclass base;
+		int rp;
+	} user;
+};
+
+void gp100_fault_buffer_intr(struct nvkm_fault_buffer *, bool enable);
+void gp100_fault_buffer_fini(struct nvkm_fault_buffer *);
+void gp100_fault_buffer_init(struct nvkm_fault_buffer *);
+u64 gp100_fault_buffer_pin(struct nvkm_fault_buffer *);
+void gp100_fault_buffer_info(struct nvkm_fault_buffer *);
+void gv100_fault_buffer_process(struct work_struct *);
+void gp100_fault_intr(struct nvkm_fault *);
+
+u64 gp10b_fault_buffer_pin(struct nvkm_fault_buffer *);
+
+int gv100_fault_oneinit(struct nvkm_fault *);
+
+int nvkm_ufault_new(struct nvkm_device *, const struct nvkm_oclass *,
+		    void *, u32, struct nvkm_object **);
+#endif

linux-7.2.3/drivers/gpu/drm/nouveau/nvkm/subdev/fault/tu102.c

@@ -0,0 +1,190 @@
+/*
+ * Copyright 2018 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "priv.h"
+
+#include <core/memory.h>
+#include <subdev/gsp.h>
+#include <subdev/mc.h>
+#include <subdev/mmu.h>
+#include <subdev/vfn.h>
+#include <engine/fifo.h>
+
+#include <nvif/class.h>
+
+static irqreturn_t
+tu102_fault_buffer_notify(struct nvkm_inth *inth)
+{
+	struct nvkm_fault_buffer *buffer = container_of(inth, typeof(*buffer), inth);
+
+	nvkm_event_ntfy(&buffer->fault->event, buffer->id, NVKM_FAULT_BUFFER_EVENT_PENDING);
+	return IRQ_HANDLED;
+}
+
+static void
+tu102_fault_buffer_intr(struct nvkm_fault_buffer *buffer, bool enable)
+{
+	if (enable)
+		nvkm_inth_allow(&buffer->inth);
+	else
+		nvkm_inth_block(&buffer->inth);
+}
+
+static void
+tu102_fault_buffer_fini(struct nvkm_fault_buffer *buffer)
+{
+	struct nvkm_device *device = buffer->fault->subdev.device;
+	const u32 foff = buffer->id * 0x20;
+
+	nvkm_mask(device, 0xb83010 + foff, 0x80000000, 0x00000000);
+}
+
+static void
+tu102_fault_buffer_init(struct nvkm_fault_buffer *buffer)
+{
+	struct nvkm_device *device = buffer->fault->subdev.device;
+	const u32 foff = buffer->id * 0x20;
+
+	nvkm_mask(device, 0xb83010 + foff, 0xc0000000, 0x40000000);
+	nvkm_wr32(device, 0xb83004 + foff, upper_32_bits(buffer->addr));
+	nvkm_wr32(device, 0xb83000 + foff, lower_32_bits(buffer->addr));
+	nvkm_mask(device, 0xb83010 + foff, 0x80000000, 0x80000000);
+}
+
+static void
+tu102_fault_buffer_info(struct nvkm_fault_buffer *buffer)
+{
+	struct nvkm_device *device = buffer->fault->subdev.device;
+	const u32 foff = buffer->id * 0x20;
+
+	nvkm_mask(device, 0xb83010 + foff, 0x40000000, 0x40000000);
+
+	buffer->entries = nvkm_rd32(device, 0xb83010 + foff) & 0x000fffff;
+	buffer->get = 0xb83008 + foff;
+	buffer->put = 0xb8300c + foff;
+}
+
+static irqreturn_t
+tu102_fault_info_fault(struct nvkm_inth *inth)
+{
+	struct nvkm_fault *fault = container_of(inth, typeof(*fault), info_fault);
+	struct nvkm_subdev *subdev = &fault->subdev;
+	struct nvkm_device *device = subdev->device;
+	struct nvkm_fault_data info;
+	const u32 addrlo = nvkm_rd32(device, 0xb83080);
+	const u32 addrhi = nvkm_rd32(device, 0xb83084);
+	const u32  info0 = nvkm_rd32(device, 0xb83088);
+	const u32 insthi = nvkm_rd32(device, 0xb8308c);
+	const u32  info1 = nvkm_rd32(device, 0xb83090);
+
+	info.addr = ((u64)addrhi << 32) | addrlo;
+	info.inst = ((u64)insthi << 32) | (info0 & 0xfffff000);
+	info.time = 0;
+	info.engine = (info0 & 0x000000ff);
+	info.valid  = (info1 & 0x80000000) >> 31;
+	info.gpc    = (info1 & 0x1f000000) >> 24;
+	info.hub    = (info1 & 0x00100000) >> 20;
+	info.access = (info1 & 0x000f0000) >> 16;
+	info.client = (info1 & 0x00007f00) >> 8;
+	info.reason = (info1 & 0x0000001f);
+
+	nvkm_fifo_fault(device->fifo, &info);
+
+	nvkm_wr32(device, 0xb83094, 0x80000000);
+	return IRQ_HANDLED;
+}
+
+static void
+tu102_fault_fini(struct nvkm_fault *fault)
+{
+	nvkm_event_ntfy_block(&fault->nrpfb);
+	flush_work(&fault->nrpfb_work);
+
+	if (fault->buffer[0])
+		fault->func->buffer.fini(fault->buffer[0]);
+
+	nvkm_inth_block(&fault->info_fault);
+}
+
+static void
+tu102_fault_init(struct nvkm_fault *fault)
+{
+	nvkm_inth_allow(&fault->info_fault);
+
+	fault->func->buffer.init(fault->buffer[0]);
+	nvkm_event_ntfy_allow(&fault->nrpfb);
+}
+
+static int
+tu102_fault_oneinit(struct nvkm_fault *fault)
+{
+	struct nvkm_device *device = fault->subdev.device;
+	struct nvkm_intr *intr = &device->vfn->intr;
+	int ret, i;
+
+	ret = nvkm_inth_add(intr, nvkm_rd32(device, 0x100ee0) & 0x0000ffff,
+			    NVKM_INTR_PRIO_NORMAL, &fault->subdev, tu102_fault_info_fault,
+			    &fault->info_fault);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < fault->buffer_nr; i++) {
+		ret = nvkm_inth_add(intr, nvkm_rd32(device, 0x100ee4 + (i * 4)) >> 16,
+				    NVKM_INTR_PRIO_NORMAL, &fault->subdev,
+				    tu102_fault_buffer_notify, &fault->buffer[i]->inth);
+		if (ret)
+			return ret;
+	}
+
+	return gv100_fault_oneinit(fault);
+}
+
+static const struct nvkm_fault_func
+tu102_fault = {
+	.oneinit = tu102_fault_oneinit,
+	.init = tu102_fault_init,
+	.fini = tu102_fault_fini,
+	.buffer.nr = 2,
+	.buffer.entry_size = 32,
+	.buffer.info = tu102_fault_buffer_info,
+	.buffer.pin = gp100_fault_buffer_pin,
+	.buffer.init = tu102_fault_buffer_init,
+	.buffer.fini = tu102_fault_buffer_fini,
+	.buffer.intr = tu102_fault_buffer_intr,
+	.user = { { 0, 0, VOLTA_FAULT_BUFFER_A }, 1 },
+};
+
+int
+tu102_fault_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
+		struct nvkm_fault **pfault)
+{
+	int ret;
+
+	if (nvkm_gsp_rm(device->gsp))
+		return -ENODEV;
+
+	ret = nvkm_fault_new_(&tu102_fault, device, type, inst, pfault);
+	if (ret)
+		return ret;
+
+	INIT_WORK(&(*pfault)->nrpfb_work, gv100_fault_buffer_process);
+	return 0;
+}

linux-7.2.3/drivers/gpu/drm/nouveau/nvkm/subdev/fault/user.c

@@ -0,0 +1,110 @@
+/*
+ * Copyright 2018 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include "priv.h"
+
+#include <core/memory.h>
+#include <core/event.h>
+#include <subdev/mmu.h>
+
+#include <nvif/clb069.h>
+#include <nvif/unpack.h>
+
+static int
+nvkm_ufault_uevent(struct nvkm_object *object, void *argv, u32 argc, struct nvkm_uevent *uevent)
+{
+	struct nvkm_fault_buffer *buffer = nvkm_fault_buffer(object);
+	union nvif_clb069_event_args *args = argv;
+
+	if (!uevent)
+		return 0;
+	if (argc != sizeof(args->vn))
+		return -ENOSYS;
+
+	return nvkm_uevent_add(uevent, &buffer->fault->event, buffer->id,
+			       NVKM_FAULT_BUFFER_EVENT_PENDING, NULL);
+}
+
+static int
+nvkm_ufault_map(struct nvkm_object *object, void *argv, u32 argc,
+		enum nvkm_object_map *type, u64 *addr, u64 *size)
+{
+	struct nvkm_fault_buffer *buffer = nvkm_fault_buffer(object);
+	struct nvkm_device *device = buffer->fault->subdev.device;
+	*type = NVKM_OBJECT_MAP_IO;
+	*addr = device->func->resource_addr(device, NVKM_BAR2_INST) + buffer->addr;
+	*size = nvkm_memory_size(buffer->mem);
+	return 0;
+}
+
+static int
+nvkm_ufault_fini(struct nvkm_object *object, enum nvkm_suspend_state suspend)
+{
+	struct nvkm_fault_buffer *buffer = nvkm_fault_buffer(object);
+	buffer->fault->func->buffer.fini(buffer);
+	return 0;
+}
+
+static int
+nvkm_ufault_init(struct nvkm_object *object)
+{
+	struct nvkm_fault_buffer *buffer = nvkm_fault_buffer(object);
+	buffer->fault->func->buffer.init(buffer);
+	return 0;
+}
+
+static void *
+nvkm_ufault_dtor(struct nvkm_object *object)
+{
+	return NULL;
+}
+
+static const struct nvkm_object_func
+nvkm_ufault = {
+	.dtor = nvkm_ufault_dtor,
+	.init = nvkm_ufault_init,
+	.fini = nvkm_ufault_fini,
+	.map = nvkm_ufault_map,
+	.uevent = nvkm_ufault_uevent,
+};
+
+int
+nvkm_ufault_new(struct nvkm_device *device, const struct nvkm_oclass *oclass,
+		void *argv, u32 argc, struct nvkm_object **pobject)
+{
+	union {
+		struct nvif_clb069_v0 v0;
+	} *args = argv;
+	struct nvkm_fault *fault = device->fault;
+	struct nvkm_fault_buffer *buffer = fault->buffer[fault->func->user.rp];
+	int ret = -ENOSYS;
+
+	if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
+		args->v0.entries = buffer->entries;
+		args->v0.get = buffer->get;
+		args->v0.put = buffer->put;
+	} else
+		return ret;
+
+	nvkm_object_ctor(&nvkm_ufault, oclass, &buffer->object);
+	*pobject = &buffer->object;
+	return 0;
+}