1 files changed, 333 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/r535.c b/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/r535.c
new file mode 100644
index 000000000000..5f3c9c02a4c0
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/instmem/r535.c
@@ -0,0 +1,333 @@
+/*
+ * Copyright 2023 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 <subdev/gsp.h>
+
+#include <nvhw/drf.h>
+
+#include <nvrm/nvtypes.h>
+#include <nvrm/535.113.01/common/sdk/nvidia/inc/class/cl84a0.h>
+#include <nvrm/535.113.01/common/sdk/nvidia/inc/ctrl/ctrl2080/ctrl2080internal.h>
+#include <nvrm/535.113.01/common/sdk/nvidia/inc/nvos.h>
+#include <nvrm/535.113.01/nvidia/generated/g_fbsr_nvoc.h>
+#include <nvrm/535.113.01/nvidia/generated/g_rpc-structures.h>
+#include <nvrm/535.113.01/nvidia/kernel/inc/vgpu/rpc_global_enums.h>
+
+struct fbsr_item {
+	const char *type;
+	u64 addr;
+	u64 size;
+
+	struct list_head head;
+};
+
+struct fbsr {
+	struct list_head items;
+
+	u64 size;
+	int regions;
+
+	struct nvkm_gsp_client client;
+	struct nvkm_gsp_device device;
+
+	u64 hmemory;
+	u64 sys_offset;
+};
+
+static int
+fbsr_memlist(struct nvkm_gsp_device *device, u32 handle, enum nvkm_memory_target aper,
+	     u64 phys, u64 size, struct sg_table *sgt, struct nvkm_gsp_object *object)
+{
+	struct nvkm_gsp_client *client = device->object.client;
+	struct nvkm_gsp *gsp = client->gsp;
+	const u32 pages = size / GSP_PAGE_SIZE;
+	rpc_alloc_memory_v13_01 *rpc;
+	int ret;
+
+	rpc = nvkm_gsp_rpc_get(gsp, NV_VGPU_MSG_FUNCTION_ALLOC_MEMORY,
+			       sizeof(*rpc) + pages * sizeof(rpc->pteDesc.pte_pde[0]));
+	if (IS_ERR(rpc))
+		return PTR_ERR(rpc);
+
+	rpc->hClient = client->object.handle;
+	rpc->hDevice = device->object.handle;
+	rpc->hMemory = handle;
+	if (aper == NVKM_MEM_TARGET_HOST) {
+		rpc->hClass = NV01_MEMORY_LIST_SYSTEM;
+		rpc->flags = NVDEF(NVOS02, FLAGS, PHYSICALITY, NONCONTIGUOUS) |
+			     NVDEF(NVOS02, FLAGS, LOCATION, PCI) |
+			     NVDEF(NVOS02, FLAGS, MAPPING, NO_MAP);
+	} else {
+		rpc->hClass = NV01_MEMORY_LIST_FBMEM;
+		rpc->flags = NVDEF(NVOS02, FLAGS, PHYSICALITY, CONTIGUOUS) |
+			     NVDEF(NVOS02, FLAGS, LOCATION, VIDMEM) |
+			     NVDEF(NVOS02, FLAGS, MAPPING, NO_MAP);
+		rpc->format = 6; /* NV_MMU_PTE_KIND_GENERIC_MEMORY */
+	}
+	rpc->pteAdjust = 0;
+	rpc->length = size;
+	rpc->pageCount = pages;
+	rpc->pteDesc.idr = 0;
+	rpc->pteDesc.reserved1 = 0;
+	rpc->pteDesc.length = pages;
+
+	if (sgt) {
+		struct scatterlist *sgl;
+		int pte = 0, idx;
+
+		for_each_sgtable_dma_sg(sgt, sgl, idx) {
+			for (int i = 0; i < sg_dma_len(sgl) / GSP_PAGE_SIZE; i++)
+				rpc->pteDesc.pte_pde[pte++].pte = (sg_dma_address(sgl) >> 12) + i;
+
+		}
+	} else {
+		for (int i = 0; i < pages; i++)
+			rpc->pteDesc.pte_pde[i].pte = (phys >> 12) + i;
+	}
+
+	ret = nvkm_gsp_rpc_wr(gsp, rpc, true);
+	if (ret)
+		return ret;
+
+	object->client = device->object.client;
+	object->parent = &device->object;
+	object->handle = handle;
+	return 0;
+}
+
+static int
+fbsr_send(struct fbsr *fbsr, struct fbsr_item *item)
+{
+	NV2080_CTRL_INTERNAL_FBSR_SEND_REGION_INFO_PARAMS *ctrl;
+	struct nvkm_gsp *gsp = fbsr->client.gsp;
+	struct nvkm_gsp_object memlist;
+	int ret;
+
+	ret = fbsr_memlist(&fbsr->device, fbsr->hmemory, NVKM_MEM_TARGET_VRAM,
+			   item->addr, item->size, NULL, &memlist);
+	if (ret)
+		return ret;
+
+	ctrl = nvkm_gsp_rm_ctrl_get(&gsp->internal.device.subdevice,
+				    NV2080_CTRL_CMD_INTERNAL_FBSR_SEND_REGION_INFO,
+				    sizeof(*ctrl));
+	if (IS_ERR(ctrl)) {
+		ret = PTR_ERR(ctrl);
+		goto done;
+	}
+
+	ctrl->fbsrType = FBSR_TYPE_DMA;
+	ctrl->hClient = fbsr->client.object.handle;
+	ctrl->hVidMem = fbsr->hmemory++;
+	ctrl->vidOffset = 0;
+	ctrl->sysOffset = fbsr->sys_offset;
+	ctrl->size = item->size;
+
+	ret = nvkm_gsp_rm_ctrl_wr(&gsp->internal.device.subdevice, ctrl);
+done:
+	nvkm_gsp_rm_free(&memlist);
+	if (ret)
+		return ret;
+
+	fbsr->sys_offset += item->size;
+	return 0;
+}
+
+static int
+fbsr_init(struct fbsr *fbsr, struct sg_table *sgt, u64 items_size)
+{
+	NV2080_CTRL_INTERNAL_FBSR_INIT_PARAMS *ctrl;
+	struct nvkm_gsp *gsp = fbsr->client.gsp;
+	struct nvkm_gsp_object memlist;
+	int ret;
+
+	ret = fbsr_memlist(&fbsr->device, fbsr->hmemory, NVKM_MEM_TARGET_HOST,
+			   0, fbsr->size, sgt, &memlist);
+	if (ret)
+		return ret;
+
+	ctrl = nvkm_gsp_rm_ctrl_get(&gsp->internal.device.subdevice,
+				    NV2080_CTRL_CMD_INTERNAL_FBSR_INIT, sizeof(*ctrl));
+	if (IS_ERR(ctrl))
+		return PTR_ERR(ctrl);
+
+	ctrl->fbsrType = FBSR_TYPE_DMA;
+	ctrl->numRegions = fbsr->regions;
+	ctrl->hClient = fbsr->client.object.handle;
+	ctrl->hSysMem = fbsr->hmemory++;
+	ctrl->gspFbAllocsSysOffset = items_size;
+
+	ret = nvkm_gsp_rm_ctrl_wr(&gsp->internal.device.subdevice, ctrl);
+	if (ret)
+		return ret;
+
+	nvkm_gsp_rm_free(&memlist);
+	return 0;
+}
+
+static bool
+fbsr_vram(struct fbsr *fbsr, const char *type, u64 addr, u64 size)
+{
+	struct fbsr_item *item;
+
+	if (!(item = kzalloc(sizeof(*item), GFP_KERNEL)))
+		return false;
+
+	item->type = type;
+	item->addr = addr;
+	item->size = size;
+	list_add_tail(&item->head, &fbsr->items);
+	return true;
+}
+
+static bool
+fbsr_inst(struct fbsr *fbsr, const char *type, struct nvkm_memory *memory)
+{
+	return fbsr_vram(fbsr, type, nvkm_memory_addr(memory), nvkm_memory_size(memory));
+}
+
+static void
+r535_instmem_resume(struct nvkm_instmem *imem)
+{
+	/* RM has restored VRAM contents already, so just need to free the sysmem buffer. */
+	if (imem->rm.fbsr_valid) {
+		nvkm_gsp_sg_free(imem->subdev.device, &imem->rm.fbsr);
+		imem->rm.fbsr_valid = false;
+	}
+}
+
+static int
+r535_instmem_suspend(struct nvkm_instmem *imem)
+{
+	struct nvkm_subdev *subdev = &imem->subdev;
+	struct nvkm_device *device = subdev->device;
+	struct nvkm_gsp *gsp = device->gsp;
+	struct nvkm_instobj *iobj;
+	struct fbsr fbsr = {};
+	struct fbsr_item *item, *temp;
+	u64 items_size;
+	int ret;
+
+	INIT_LIST_HEAD(&fbsr.items);
+	fbsr.hmemory = 0xcaf00003;
+
+	/* Create a list of all regions we need RM to save during suspend. */
+	list_for_each_entry(iobj, &imem->list, head) {
+		if (iobj->preserve) {
+			if (!fbsr_inst(&fbsr, "inst", &iobj->memory))
+				return -ENOMEM;
+		}
+	}
+
+	list_for_each_entry(iobj, &imem->boot, head) {
+		if (!fbsr_inst(&fbsr, "boot", &iobj->memory))
+			return -ENOMEM;
+	}
+
+	if (!fbsr_vram(&fbsr, "gsp-non-wpr", gsp->fb.heap.addr, gsp->fb.heap.size))
+		return -ENOMEM;
+
+	/* Determine memory requirements. */
+	list_for_each_entry(item, &fbsr.items, head) {
+		nvkm_debug(subdev, "fbsr: %016llx %016llx %s\n",
+			   item->addr, item->size, item->type);
+		fbsr.size += item->size;
+		fbsr.regions++;
+	}
+
+	items_size = fbsr.size;
+	nvkm_debug(subdev, "fbsr: %d regions (0x%llx bytes)\n", fbsr.regions, items_size);
+
+	fbsr.size += gsp->fb.rsvd_size;
+	fbsr.size += gsp->fb.bios.vga_workspace.size;
+	nvkm_debug(subdev, "fbsr: size: 0x%llx bytes\n", fbsr.size);
+
+	ret = nvkm_gsp_sg(gsp->subdev.device, fbsr.size, &imem->rm.fbsr);
+	if (ret)
+		goto done;
+
+	/* Tell RM about the sysmem which will hold VRAM contents across suspend. */
+	ret = nvkm_gsp_client_device_ctor(gsp, &fbsr.client, &fbsr.device);
+	if (ret)
+		goto done_sgt;
+
+	ret = fbsr_init(&fbsr, &imem->rm.fbsr, items_size);
+	if (WARN_ON(ret))
+		goto done_sgt;
+
+	/* Send VRAM regions that need saving. */
+	list_for_each_entry(item, &fbsr.items, head) {
+		ret = fbsr_send(&fbsr, item);
+		if (WARN_ON(ret))
+			goto done_sgt;
+	}
+
+	imem->rm.fbsr_valid = true;
+
+	/* Cleanup everything except the sysmem backup, which will be removed after resume. */
+done_sgt:
+	if (ret) /* ... unless we failed already. */
+		nvkm_gsp_sg_free(device, &imem->rm.fbsr);
+done:
+	list_for_each_entry_safe(item, temp, &fbsr.items, head) {
+		list_del(&item->head);
+		kfree(item);
+	}
+
+	nvkm_gsp_device_dtor(&fbsr.device);
+	nvkm_gsp_client_dtor(&fbsr.client);
+	return ret;
+}
+
+static void *
+r535_instmem_dtor(struct nvkm_instmem *imem)
+{
+	kfree(imem->func);
+	return imem;
+}
+
+int
+r535_instmem_new(const struct nvkm_instmem_func *hw,
+		 struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
+		 struct nvkm_instmem **pinstmem)
+{
+	struct nvkm_instmem_func *rm;
+	int ret;
+
+	if (!(rm = kzalloc(sizeof(*rm), GFP_KERNEL)))
+		return -ENOMEM;
+
+	rm->dtor = r535_instmem_dtor;
+	rm->fini = hw->fini;
+	rm->suspend = r535_instmem_suspend;
+	rm->resume  = r535_instmem_resume;
+	rm->memory_new = hw->memory_new;
+	rm->memory_wrap = hw->memory_wrap;
+	rm->zero = false;
+
+	ret = nv50_instmem_new_(rm, device, type, inst, pinstmem);
+	if (ret)
+		kfree(rm);
+
+	return ret;
+}