drm/nouveau/fault: store get/put pri address in nvkm_fault_buffer

Will allow more shared fault buffer handling code between Pascal/Volta.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

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

@@ -96,7 +96,7 @@ nvkm_fault_oneinit_buffer(struct nvkm_fault *fault, int id)
 		return -ENOMEM;
 	buffer->fault = fault;
 	buffer->id = id;
-	buffer->entries = fault->func->buffer.entries(buffer);
+	fault->func->buffer.info(buffer);
 	fault->buffer[id] = buffer;
 
 	nvkm_debug(subdev, "buffer %d: %d entries\n", id, buffer->entries);

drivers/gpu/drm/nouveau/nvkm/subdev/fault/gp100.c

@@ -37,10 +37,12 @@ gp100_fault_buffer_init(struct nvkm_fault_buffer *buffer)
 	nvkm_mask(device, 0x002a70, 0x00000001, 0x00000001);
 }
 
-static u32
-gp100_fault_buffer_entries(struct nvkm_fault_buffer *buffer)
+static void
+gp100_fault_buffer_info(struct nvkm_fault_buffer *buffer)
 {
-	return nvkm_rd32(buffer->fault->subdev.device, 0x002a78);
+	buffer->entries = nvkm_rd32(buffer->fault->subdev.device, 0x002a78);
+	buffer->get = 0x002a7c;
+	buffer->put = 0x002a80;
 }
 
 static void
@@ -54,7 +56,7 @@ gp100_fault = {
 	.intr = gp100_fault_intr,
 	.buffer.nr = 1,
 	.buffer.entry_size = 32,
-	.buffer.entries = gp100_fault_buffer_entries,
+	.buffer.info = gp100_fault_buffer_info,
 	.buffer.init = gp100_fault_buffer_init,
 	.buffer.fini = gp100_fault_buffer_fini,
 };

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

@@ -30,9 +30,8 @@ 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);
+	u32 get = nvkm_rd32(device, buffer->get);
+	u32 put = nvkm_rd32(device, buffer->put);
 	if (put == get)
 		return;
 
@@ -51,7 +50,7 @@ gv100_fault_buffer_process(struct nvkm_fault_buffer *buffer)
 
 		if (++get == buffer->entries)
 			get = 0;
-		nvkm_wr32(device, 0x100e2c + foff, get);
+		nvkm_wr32(device, buffer->get, get);
 
 		info.addr   = ((u64)addrhi << 32) | addrlo;
 		info.inst   = ((u64)insthi << 32) | instlo;
@@ -94,13 +93,17 @@ gv100_fault_buffer_init(struct nvkm_fault_buffer *buffer)
 	nvkm_mask(device, 0x100a2c, intr, intr);
 }
 
-static u32
-gv100_fault_buffer_entries(struct nvkm_fault_buffer *buffer)
+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);
-	return nvkm_rd32(device, 0x100e34 + foff) & 0x000fffff;
+
+	buffer->entries = nvkm_rd32(device, 0x100e34 + foff) & 0x000fffff;
+	buffer->get = 0x100e2c + foff;
+	buffer->put = 0x100e30 + foff;
 }
 
 static int
@@ -192,7 +195,7 @@ gv100_fault = {
 	.intr = gv100_fault_intr,
 	.buffer.nr = 2,
 	.buffer.entry_size = 32,
-	.buffer.entries = gv100_fault_buffer_entries,
+	.buffer.info = gv100_fault_buffer_info,
 	.buffer.init = gv100_fault_buffer_init,
 	.buffer.fini = gv100_fault_buffer_fini,
 };

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

@@ -12,6 +12,8 @@ struct nvkm_fault_buffer {
 	struct nvkm_fault *fault;
 	int id;
 	int entries;
+	u32 get;
+	u32 put;
 	struct nvkm_memory *mem;
 	u64 addr;
 };
@@ -27,7 +29,7 @@ struct nvkm_fault_func {
 	struct {
 		int nr;
 		u32 entry_size;
-		u32 (*entries)(struct nvkm_fault_buffer *);
+		void (*info)(struct nvkm_fault_buffer *);
 		void (*init)(struct nvkm_fault_buffer *);
 		void (*fini)(struct nvkm_fault_buffer *);
 	} buffer;