gpu: nvgpu: vgpu: add channel_set_priority support

- add gops.fifo.channel_set_priority and move current code
  as native callback.
- implement the callback for vgpu

Bug 1701079

Change-Id: If1cd13ea4478d11d578da2f682598e0c4522bcaf
Signed-off-by: Richard Zhao <rizhao@nvidia.com>
Reviewed-on: http://git-master/r/932829
Reviewed-by: Aingara Paramakuru <aparamakuru@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

drivers/gpu/nvgpu/gk20a/channel_gk20a.c

@@ -2539,8 +2539,7 @@ unsigned int gk20a_channel_poll(struct file *filep, poll_table *wait)
 	return mask;
 }
 
-static int gk20a_channel_set_priority(struct channel_gk20a *ch,
-		u32 priority)
+int gk20a_channel_set_priority(struct channel_gk20a *ch, u32 priority)
 {
 	u32 timeslice_timeout;
 	bool interleave = false;
@@ -2723,6 +2722,7 @@ void gk20a_init_channel(struct gpu_ops *gops)
 	gops->fifo.alloc_inst = channel_gk20a_alloc_inst;
 	gops->fifo.free_inst = channel_gk20a_free_inst;
 	gops->fifo.setup_ramfc = channel_gk20a_setup_ramfc;
+	gops->fifo.channel_set_priority = gk20a_channel_set_priority;
 }
 
 long gk20a_channel_ioctl(struct file *filp,
@@ -2897,7 +2897,7 @@ long gk20a_channel_ioctl(struct file *filp,
 				__func__, cmd);
 			break;
 		}
-		err = gk20a_channel_set_priority(ch,
+		err = ch->g->ops.fifo.channel_set_priority(ch,
 			((struct nvgpu_set_priority_args *)buf)->priority);
 		gk20a_idle(dev);
 		break;

drivers/gpu/nvgpu/gk20a/channel_gk20a.h

@@ -268,5 +268,6 @@ void gk20a_channel_timeout_restart_all_channels(struct gk20a *g);
 int gk20a_channel_get_timescale_from_timeslice(struct gk20a *g,
 		int timeslice_period,
 		int *__timeslice_timeout, int *__timeslice_scale);
+int gk20a_channel_set_priority(struct channel_gk20a *ch, u32 priority);
 
 #endif /* CHANNEL_GK20A_H */

drivers/gpu/nvgpu/gk20a/gk20a.h

@@ -260,6 +260,7 @@ struct gpu_ops {
 		int (*wait_engine_idle)(struct gk20a *g);
 		u32 (*get_num_fifos)(struct gk20a *g);
 		u32 (*get_pbdma_signature)(struct gk20a *g);
+		int (*channel_set_priority)(struct channel_gk20a *ch, u32 priority);
 	} fifo;
 	struct pmu_v {
 		/*used for change of enum zbc update cmd id from ver 0 to ver1*/

drivers/gpu/nvgpu/gm20b/fifo_gm20b.c

@@ -113,6 +113,7 @@ void gm20b_init_fifo(struct gpu_ops *gops)
 	gops->fifo.alloc_inst = channel_gk20a_alloc_inst;
 	gops->fifo.free_inst = channel_gk20a_free_inst;
 	gops->fifo.setup_ramfc = channel_gk20a_setup_ramfc;
+	gops->fifo.channel_set_priority = gk20a_channel_set_priority;
 
 	gops->fifo.preempt_channel = gk20a_fifo_preempt_channel;
 	gops->fifo.update_runlist = gk20a_fifo_update_runlist;

drivers/gpu/nvgpu/vgpu/fifo_vgpu.c

@@ -194,6 +194,12 @@ static int init_runlist(struct gk20a *g, struct fifo_gk20a *f)
 	if (!runlist->active_channels)
 		goto clean_up_runlist_info;
 
+	runlist->high_prio_channels =
+		kzalloc(DIV_ROUND_UP(f->num_channels, BITS_PER_BYTE),
+			GFP_KERNEL);
+	if (!runlist->high_prio_channels)
+		goto clean_up_runlist_info;
+
 	runlist_size  = sizeof(u16) * f->num_channels;
 	for (i = 0; i < MAX_RUNLIST_BUFFERS; i++) {
 		int err = gk20a_gmmu_alloc(g, runlist_size, &runlist->mem[i]);
@@ -215,10 +221,13 @@ clean_up_runlist:
 	for (i = 0; i < MAX_RUNLIST_BUFFERS; i++)
 		gk20a_gmmu_free(g, &runlist->mem[i]);
 
+clean_up_runlist_info:
+	kfree(runlist->high_prio_channels);
+	runlist->high_prio_channels = NULL;
+
 	kfree(runlist->active_channels);
 	runlist->active_channels = NULL;
 
-clean_up_runlist_info:
 	kfree(f->runlist_info);
 	f->runlist_info = NULL;
 
@@ -521,6 +530,26 @@ static int vgpu_fifo_wait_engine_idle(struct gk20a *g)
 	return 0;
 }
 
+static int vgpu_channel_set_priority(struct channel_gk20a *ch, u32 priority)
+{
+	struct gk20a_platform *platform = gk20a_get_platform(ch->g->dev);
+	struct tegra_vgpu_cmd_msg msg;
+	struct tegra_vgpu_channel_priority_params *p =
+			&msg.params.channel_priority;
+	int err;
+
+	gk20a_dbg_info("channel %d set priority %u", ch->hw_chid, priority);
+
+	msg.cmd = TEGRA_VGPU_CMD_CHANNEL_SET_PRIORITY;
+	msg.handle = platform->virt_handle;
+	p->handle = ch->virt_ctx;
+	p->priority = priority;
+	err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
+	WARN_ON(err || msg.ret);
+
+	return err ? err : msg.ret;
+}
+
 static void vgpu_fifo_set_ctx_mmu_error(struct gk20a *g,
 		struct channel_gk20a *ch)
 {
@@ -605,5 +634,6 @@ void vgpu_init_fifo_ops(struct gpu_ops *gops)
 	gops->fifo.preempt_channel = vgpu_fifo_preempt_channel;
 	gops->fifo.update_runlist = vgpu_fifo_update_runlist;
 	gops->fifo.wait_engine_idle = vgpu_fifo_wait_engine_idle;
+	gops->fifo.channel_set_priority = vgpu_channel_set_priority;
 }
 

include/linux/tegra_vgpu.h

@@ -73,7 +73,8 @@ enum {
 	TEGRA_VGPU_CMD_CHANNEL_BIND_GR_CTXSW_BUFFERS,
 	TEGRA_VGPU_CMD_SET_MMU_DEBUG_MODE,
 	TEGRA_VGPU_CMD_SET_SM_DEBUG_MODE,
-	TEGRA_VGPU_CMD_REG_OPS
+	TEGRA_VGPU_CMD_REG_OPS,
+	TEGRA_VGPU_CMD_CHANNEL_SET_PRIORITY
 };
 
 struct tegra_vgpu_connect_params {
@@ -292,6 +293,11 @@ struct tegra_vgpu_reg_ops_params {
 	u32 is_profiler;
 };
 
+struct tegra_vgpu_channel_priority_params {
+	u64 handle;
+	u32 priority;
+};
+
 struct tegra_vgpu_cmd_msg {
 	u32 cmd;
 	int ret;
@@ -319,6 +325,7 @@ struct tegra_vgpu_cmd_msg {
 		struct tegra_vgpu_mmu_debug_mode mmu_debug_mode;
 		struct tegra_vgpu_sm_debug_mode sm_debug_mode;
 		struct tegra_vgpu_reg_ops_params reg_ops;
+		struct tegra_vgpu_channel_priority_params channel_priority;
 		char padding[192];
 	} params;
 };