drm/nouveau/fault/gv100: initial support

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

4 files changed, 213 insertions, 1 deletions

diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/fault.h b/drivers/gpu/drm/nouveau/include/nvkm/subdev/fault.h
index 8e9bc30fe65d..5a77498fe6a0 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/subdev/fault.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/fault.h
@@ -1,15 +1,18 @@
 #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
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
index 6aaa3d9cb88c..7f0385dbed06 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/base.c
+++ b/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,
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fault/Kbuild b/drivers/gpu/drm/nouveau/nvkm/subdev/fault/Kbuild
index 807ea402a162..45bb46fb0929 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fault/Kbuild
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fault/Kbuild
@@ -1,2 +1,3 @@
 nvkm-y += nvkm/subdev/fault/base.o
 nvkm-y += nvkm/subdev/fault/gp100.o
+nvkm-y += nvkm/subdev/fault/gv100.o
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gv100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gv100.c
new file mode 100644
index 000000000000..73c7728b5969
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fault/gv100.c
@@ -0,0 +1,206 @@
+/*
+ * 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);
+}