drm/nouveau/falcon: support for gm20b msgqueue

Add support for the msgqueue firmware used to process PMU commands for
gm20b.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nvkm/falcon/Kbuild

 nvkm-y += nvkm/falcon/base.o
 nvkm-y += nvkm/falcon/v1.o
 nvkm-y += nvkm/falcon/msgqueue.o
+nvkm-y += nvkm/falcon/msgqueue_0137c63d.o

drivers/gpu/drm/nouveau/nvkm/falcon/msgqueue.c

@@ -475,6 +475,9 @@ nvkm_msgqueue_new(u32 version, struct nvkm_falcon *falcon, struct nvkm_msgqueue
 	int ret = -EINVAL;
 
 	switch (version) {
+	case 0x0137c63d:
+		ret = msgqueue_0137c63d_new(falcon, queue);
+		break;
 	default:
 		nvkm_error(subdev, "unhandled firmware version 0x%08x\n",
 			   version);

drivers/gpu/drm/nouveau/nvkm/falcon/msgqueue.h

@@ -201,4 +201,6 @@ int nvkm_msgqueue_post(struct nvkm_msgqueue *, enum msgqueue_msg_priority,
 void nvkm_msgqueue_process_msgs(struct nvkm_msgqueue *,
 				struct nvkm_msgqueue_queue *);
 
+int msgqueue_0137c63d_new(struct nvkm_falcon *, struct nvkm_msgqueue **);
+
 #endif

drivers/gpu/drm/nouveau/nvkm/falcon/msgqueue_0137c63d.c

+/*
+ * Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
+ *
+ * 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 "msgqueue.h"
+#include <engine/falcon.h>
+#include <subdev/secboot.h>
+
+/* Queues identifiers */
+enum {
+	/* High Priority Command Queue for Host -> PMU communication */
+	MSGQUEUE_0137C63D_COMMAND_QUEUE_HPQ = 0,
+	/* Low Priority Command Queue for Host -> PMU communication */
+	MSGQUEUE_0137C63D_COMMAND_QUEUE_LPQ = 1,
+	/* Message queue for PMU -> Host communication */
+	MSGQUEUE_0137C63D_MESSAGE_QUEUE = 4,
+	MSGQUEUE_0137C63D_NUM_QUEUES = 5,
+};
+
+struct msgqueue_0137c63d {
+	struct nvkm_msgqueue base;
+
+	struct nvkm_msgqueue_queue queue[MSGQUEUE_0137C63D_NUM_QUEUES];
+};
+#define msgqueue_0137c63d(q) \
+	container_of(q, struct msgqueue_0137c63d, base)
+
+static struct nvkm_msgqueue_queue *
+msgqueue_0137c63d_cmd_queue(struct nvkm_msgqueue *queue,
+			    enum msgqueue_msg_priority priority)
+{
+	struct msgqueue_0137c63d *priv = msgqueue_0137c63d(queue);
+	const struct nvkm_subdev *subdev = priv->base.falcon->owner;
+
+	switch (priority) {
+	case MSGQUEUE_MSG_PRIORITY_HIGH:
+		return &priv->queue[MSGQUEUE_0137C63D_COMMAND_QUEUE_HPQ];
+	case MSGQUEUE_MSG_PRIORITY_LOW:
+		return &priv->queue[MSGQUEUE_0137C63D_COMMAND_QUEUE_LPQ];
+	default:
+		nvkm_error(subdev, "invalid command queue!\n");
+		return ERR_PTR(-EINVAL);
+	}
+}
+
+static void
+msgqueue_0137c63d_process_msgs(struct nvkm_msgqueue *queue)
+{
+	struct msgqueue_0137c63d *priv = msgqueue_0137c63d(queue);
+	struct nvkm_msgqueue_queue *q_queue =
+		&priv->queue[MSGQUEUE_0137C63D_MESSAGE_QUEUE];
+
+	nvkm_msgqueue_process_msgs(&priv->base, q_queue);
+}
+
+/* Init unit */
+#define MSGQUEUE_0137C63D_UNIT_INIT 0x07
+
+enum {
+	INIT_MSG_INIT = 0x0,
+};
+
+static void
+init_gen_cmdline(struct nvkm_msgqueue *queue, void *buf)
+{
+	struct {
+		u32 reserved;
+		u32 freq_hz;
+		u32 trace_size;
+		u32 trace_dma_base;
+		u16 trace_dma_base1;
+		u8 trace_dma_offset;
+		u32 trace_dma_idx;
+		bool secure_mode;
+		bool raise_priv_sec;
+		struct {
+			u32 dma_base;
+			u16 dma_base1;
+			u8 dma_offset;
+			u16 fb_size;
+			u8 dma_idx;
+		} gc6_ctx;
+		u8 pad;
+	} *args = buf;
+
+	args->secure_mode = 1;
+}
+
+/* forward declaration */
+static int acr_init_wpr(struct nvkm_msgqueue *queue);
+
+static int
+init_callback(struct nvkm_msgqueue *_queue, struct nvkm_msgqueue_hdr *hdr)
+{
+	struct msgqueue_0137c63d *priv = msgqueue_0137c63d(_queue);
+	struct {
+		struct nvkm_msgqueue_msg base;
+
+		u8 pad;
+		u16 os_debug_entry_point;
+
+		struct {
+			u16 size;
+			u16 offset;
+			u8 index;
+			u8 pad;
+		} queue_info[MSGQUEUE_0137C63D_NUM_QUEUES];
+
+		u16 sw_managed_area_offset;
+		u16 sw_managed_area_size;
+	} *init = (void *)hdr;
+	const struct nvkm_subdev *subdev = _queue->falcon->owner;
+	int i;
+
+	if (init->base.hdr.unit_id != MSGQUEUE_0137C63D_UNIT_INIT) {
+		nvkm_error(subdev, "expected message from init unit\n");
+		return -EINVAL;
+	}
+
+	if (init->base.msg_type != INIT_MSG_INIT) {
+		nvkm_error(subdev, "expected PMU init msg\n");
+		return -EINVAL;
+	}
+
+	for (i = 0; i < MSGQUEUE_0137C63D_NUM_QUEUES; i++) {
+		struct nvkm_msgqueue_queue *queue = &priv->queue[i];
+
+		mutex_init(&queue->mutex);
+
+		queue->index = init->queue_info[i].index;
+		queue->offset = init->queue_info[i].offset;
+		queue->size = init->queue_info[i].size;
+
+		if (i != MSGQUEUE_0137C63D_MESSAGE_QUEUE) {
+			queue->head_reg = 0x4a0 + (queue->index * 4);
+			queue->tail_reg = 0x4b0 + (queue->index * 4);
+		} else {
+			queue->head_reg = 0x4c8;
+			queue->tail_reg = 0x4cc;
+		}
+
+		nvkm_debug(subdev,
+			   "queue %d: index %d, offset 0x%08x, size 0x%08x\n",
+			   i, queue->index, queue->offset, queue->size);
+	}
+
+	/* Complete initialization by initializing WPR region */
+	return acr_init_wpr(&priv->base);
+}
+
+static const struct nvkm_msgqueue_init_func
+msgqueue_0137c63d_init_func = {
+	.gen_cmdline = init_gen_cmdline,
+	.init_callback = init_callback,
+};
+
+
+
+/* ACR unit */
+#define MSGQUEUE_0137C63D_UNIT_ACR 0x0a
+
+enum {
+	ACR_CMD_INIT_WPR_REGION = 0x00,
+	ACR_CMD_BOOTSTRAP_FALCON = 0x01,
+};
+
+static void
+acr_init_wpr_callback(struct nvkm_msgqueue *queue,
+		      struct nvkm_msgqueue_hdr *hdr)
+{
+	struct {
+		struct nvkm_msgqueue_msg base;
+		u32 error_code;
+	} *msg = (void *)hdr;
+	const struct nvkm_subdev *subdev = queue->falcon->owner;
+
+	if (msg->error_code) {
+		nvkm_error(subdev, "ACR WPR init failure: %d\n",
+			   msg->error_code);
+		return;
+	}
+
+	nvkm_debug(subdev, "ACR WPR init complete\n");
+	complete_all(&queue->init_done);
+}
+
+static int
+acr_init_wpr(struct nvkm_msgqueue *queue)
+{
+	/*
+	 * region_id:	region ID in WPR region
+	 * wpr_offset:	offset in WPR region
+	 */
+	struct {
+		struct nvkm_msgqueue_hdr hdr;
+		u8 cmd_type;
+		u32 region_id;
+		u32 wpr_offset;
+	} cmd;
+	memset(&cmd, 0, sizeof(cmd));
+
+	cmd.hdr.unit_id = MSGQUEUE_0137C63D_UNIT_ACR;
+	cmd.hdr.size = sizeof(cmd);
+	cmd.cmd_type = ACR_CMD_INIT_WPR_REGION;
+	cmd.region_id = 0x01;
+	cmd.wpr_offset = 0x00;
+
+	nvkm_msgqueue_post(queue, MSGQUEUE_MSG_PRIORITY_HIGH, &cmd.hdr,
+			   acr_init_wpr_callback, NULL, false);
+
+	return 0;
+}
+
+
+static void
+acr_boot_falcon_callback(struct nvkm_msgqueue *priv,
+			 struct nvkm_msgqueue_hdr *hdr)
+{
+	struct acr_bootstrap_falcon_msg {
+		struct nvkm_msgqueue_msg base;
+
+		u32 falcon_id;
+	} *msg = (void *)hdr;
+	const struct nvkm_subdev *subdev = priv->falcon->owner;
+	u32 falcon_id = msg->falcon_id;
+
+	if (falcon_id >= NVKM_SECBOOT_FALCON_END) {
+		nvkm_error(subdev, "in bootstrap falcon callback:\n");
+		nvkm_error(subdev, "invalid falcon ID 0x%x\n", falcon_id);
+		return;
+	}
+	nvkm_debug(subdev, "%s booted\n", nvkm_secboot_falcon_name[falcon_id]);
+}
+
+enum {
+	ACR_CMD_BOOTSTRAP_FALCON_FLAGS_RESET_YES = 0,
+	ACR_CMD_BOOTSTRAP_FALCON_FLAGS_RESET_NO = 1,
+};
+
+static int
+acr_boot_falcon(struct nvkm_msgqueue *priv, enum nvkm_secboot_falcon falcon)
+{
+	DECLARE_COMPLETION_ONSTACK(completed);
+	/*
+	 * flags      - Flag specifying RESET or no RESET.
+	 * falcon id  - Falcon id specifying falcon to bootstrap.
+	 */
+	struct {
+		struct nvkm_msgqueue_hdr hdr;
+		u8 cmd_type;
+		u32 flags;
+		u32 falcon_id;
+	} cmd;
+
+	memset(&cmd, 0, sizeof(cmd));
+
+	cmd.hdr.unit_id = MSGQUEUE_0137C63D_UNIT_ACR;
+	cmd.hdr.size = sizeof(cmd);
+	cmd.cmd_type = ACR_CMD_BOOTSTRAP_FALCON;
+	cmd.flags = ACR_CMD_BOOTSTRAP_FALCON_FLAGS_RESET_YES;
+	cmd.falcon_id = falcon;
+	nvkm_msgqueue_post(priv, MSGQUEUE_MSG_PRIORITY_HIGH, &cmd.hdr,
+			acr_boot_falcon_callback, &completed, true);
+
+	if (!wait_for_completion_timeout(&completed, msecs_to_jiffies(1000)))
+		return -ETIMEDOUT;
+
+	return 0;
+}
+
+static const struct nvkm_msgqueue_acr_func
+msgqueue_0137c63d_acr_func = {
+	.boot_falcon = acr_boot_falcon,
+};
+
+static void
+msgqueue_0137c63d_dtor(struct nvkm_msgqueue *queue)
+{
+	kfree(msgqueue_0137c63d(queue));
+}
+
+static const struct nvkm_msgqueue_func
+msgqueue_0137c63d_func = {
+	.init_func = &msgqueue_0137c63d_init_func,
+	.acr_func = &msgqueue_0137c63d_acr_func,
+	.cmd_queue = msgqueue_0137c63d_cmd_queue,
+	.recv = msgqueue_0137c63d_process_msgs,
+	.dtor = msgqueue_0137c63d_dtor,
+};
+
+int
+msgqueue_0137c63d_new(struct nvkm_falcon *falcon, struct nvkm_msgqueue **queue)
+{
+	struct msgqueue_0137c63d *ret;
+
+	ret = kzalloc(sizeof(*ret), GFP_KERNEL);
+	if (!ret)
+		return -ENOMEM;
+
+	*queue = &ret->base;
+
+	nvkm_msgqueue_ctor(&msgqueue_0137c63d_func, falcon, &ret->base);
+
+	return 0;
+}