drm/nouveau/fault/gv100: initial support

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/include/nvkm/subdev/fault.h

 #ifndef __NVKM_FAULT_H__
 #define __NVKM_FAULT_H__
 #include <core/subdev.h>
+#include <core/notify.h>
 
 struct nvkm_fault {
 	const struct nvkm_fault_func *func;
 	struct nvkm_subdev subdev;
 
-	struct nvkm_fault_buffer *buffer[1];
+	struct nvkm_fault_buffer *buffer[2];
 	int buffer_nr;
 
 	struct nvkm_event event;
+
+	struct nvkm_notify nrpfb;
 };
 
 struct nvkm_fault_data {
@@ -26,4 +29,5 @@ struct nvkm_fault_data {
 };
 
 int gp100_fault_new(struct nvkm_device *, int, struct nvkm_fault **);
+int gv100_fault_new(struct nvkm_device *, int, struct nvkm_fault **);
 #endif

drivers/gpu/drm/nouveau/nvkm/engine/device/base.c

@@ -2401,6 +2401,7 @@ nv140_chipset = {
 	.bios = nvkm_bios_new,
 	.bus = gf100_bus_new,
 	.devinit = gv100_devinit_new,
+	.fault = gv100_fault_new,
 	.fb = gv100_fb_new,
 	.fuse = gm107_fuse_new,
 	.gpio = gk104_gpio_new,

drivers/gpu/drm/nouveau/nvkm/subdev/fault/Kbuild

 nvkm-y += nvkm/subdev/fault/base.o
 nvkm-y += nvkm/subdev/fault/gp100.o
+nvkm-y += nvkm/subdev/fault/gv100.o

drivers/gpu/drm/nouveau/nvkm/subdev/fault/gv100.c

+/*
+ * 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>
+
+static void
+gv100_fault_buffer_process(struct nvkm_fault_buffer *buffer)
+{
+	struct nvkm_device *device = buffer->fault->subdev.device;
+	struct nvkm_memory *mem = buffer->mem;
+	const u32 foff = buffer->id * 0x14;
+	u32 get = nvkm_rd32(device, 0x100e2c + foff);
+	u32 put = nvkm_rd32(device, 0x100e30 + foff);
+	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, 0x100e2c + foff, 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_fini(struct nvkm_fault_buffer *buffer)
+{
+	struct nvkm_device *device = buffer->fault->subdev.device;
+	const u32 intr = buffer->id ? 0x08000000 : 0x20000000;
+	const u32 foff = buffer->id * 0x14;
+
+	nvkm_mask(device, 0x100a34, intr, intr);
+	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 intr = buffer->id ? 0x08000000 : 0x20000000;
+	const u32 foff = buffer->id * 0x14;
+
+	nvkm_mask(device, 0x100e34 + foff, 0xc0000000, 0x40000000);
+	nvkm_wr32(device, 0x100e28 + foff, upper_32_bits(buffer->vma->addr));
+	nvkm_wr32(device, 0x100e24 + foff, lower_32_bits(buffer->vma->addr));
+	nvkm_mask(device, 0x100e34 + foff, 0x80000000, 0x80000000);
+	nvkm_mask(device, 0x100a2c, intr, intr);
+}
+
+static u32
+gv100_fault_buffer_entries(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);
+	return nvkm_rd32(device, 0x100e34 + foff) & 0x000fffff;
+}
+
+static int
+gv100_fault_ntfy_nrpfb(struct nvkm_notify *notify)
+{
+	struct nvkm_fault *fault = container_of(notify, typeof(*fault), nrpfb);
+	gv100_fault_buffer_process(fault->buffer[0]);
+	return NVKM_NOTIFY_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_send(&fault->event, 1, 0, NULL, 0);
+			stat &= ~0x20000000;
+		}
+	}
+
+	if (stat) {
+		nvkm_debug(subdev, "intr %08x\n", stat);
+	}
+}
+
+static void
+gv100_fault_fini(struct nvkm_fault *fault)
+{
+	nvkm_notify_put(&fault->nrpfb);
+	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);
+	nvkm_notify_get(&fault->nrpfb);
+}
+
+static const struct nvkm_fault_func
+gv100_fault = {
+	.init = gv100_fault_init,
+	.fini = gv100_fault_fini,
+	.intr = gv100_fault_intr,
+	.buffer.nr = 2,
+	.buffer.entry_size = 32,
+	.buffer.entries = gv100_fault_buffer_entries,
+	.buffer.init = gv100_fault_buffer_init,
+	.buffer.fini = gv100_fault_buffer_fini,
+};
+
+int
+gv100_fault_new(struct nvkm_device *device, int index,
+		struct nvkm_fault **pfault)
+{
+	struct nvkm_fault *fault;
+	int ret;
+
+	ret = nvkm_fault_new_(&gv100_fault, device, index, &fault);
+	*pfault = fault;
+	if (ret)
+		return ret;
+
+	return nvkm_notify_init(&fault->buffer[0]->object, &fault->event,
+				gv100_fault_ntfy_nrpfb, false, NULL, 0, 0,
+				&fault->nrpfb);
+}