gpu: nvgpu: add tsg support for vgpu

- make tsg_gk20a.c call HAL for enable/disable channels
- add preempt_tsg HAL callbacks
- add tsg bind/unbind channel HAL callbacks
- add according tsg callbacks for vgpu

Bug 1702773
JIRA VFND-1003

Change-Id: I2cba74b3ebd3920ef09219a168e6433d9574dbe8
Signed-off-by: Richard Zhao <rizhao@nvidia.com>
Reviewed-on: http://git-master/r/1144932
(cherry picked from commit c3787de7d38651d46969348f5acae2ba86b31ec7)
Reviewed-on: http://git-master/r/1126942
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Tested-by: Terje Bergstrom <tbergstrom@nvidia.com>

drivers/gpu/nvgpu/Makefile

@@ -95,6 +95,7 @@ nvgpu-$(CONFIG_TEGRA_GR_VIRTUALIZATION) += \
 	vgpu/vgpu.o \
 	vgpu/dbg_vgpu.o \
 	vgpu/fecs_trace_vgpu.o \
+	vgpu/tsg_vgpu.o \
 	vgpu/gk20a/vgpu_hal_gk20a.o \
 	vgpu/gk20a/vgpu_gr_gk20a.o \
 	vgpu/gm20b/vgpu_hal_gm20b.o \

drivers/gpu/nvgpu/gk20a/channel_gk20a.c

@@ -952,7 +952,7 @@ static void gk20a_free_channel(struct channel_gk20a *ch)
 
 unbind:
 	if (gk20a_is_channel_marked_as_tsg(ch))
-		gk20a_tsg_unbind_channel(ch);
+		g->ops.fifo.tsg_unbind_channel(ch);
 
 	g->ops.fifo.unbind_channel(ch);
 	g->ops.fifo.free_inst(g, ch);

drivers/gpu/nvgpu/gk20a/fifo_gk20a.c

@@ -2015,7 +2015,7 @@ int gk20a_fifo_preempt(struct gk20a *g, struct channel_gk20a *ch)
 	int err;
 
 	if (gk20a_is_channel_marked_as_tsg(ch))
-		err = gk20a_fifo_preempt_tsg(ch->g, ch->tsgid);
+		err = g->ops.fifo.preempt_tsg(ch->g, ch->tsgid);
 	else
 		err = g->ops.fifo.preempt_channel(ch->g, ch->hw_chid);
 
@@ -2754,6 +2754,7 @@ void gk20a_init_fifo(struct gpu_ops *gops)
 {
 	gk20a_init_channel(gops);
 	gops->fifo.preempt_channel = gk20a_fifo_preempt_channel;
+	gops->fifo.preempt_tsg = gk20a_fifo_preempt_tsg;
 	gops->fifo.update_runlist = gk20a_fifo_update_runlist;
 	gops->fifo.trigger_mmu_fault = gk20a_fifo_trigger_mmu_fault;
 	gops->fifo.apply_pb_timeout = gk20a_fifo_apply_pb_timeout;

drivers/gpu/nvgpu/gk20a/gk20a.h

@@ -324,6 +324,7 @@ struct gpu_ops {
 				u32 gpfifo_entries, u32 flags);
 		int (*resetup_ramfc)(struct channel_gk20a *c);
 		int (*preempt_channel)(struct gk20a *g, u32 hw_chid);
+		int (*preempt_tsg)(struct gk20a *g, u32 tsgid);
 		int (*update_runlist)(struct gk20a *g, u32 runlist_id,
 				u32 hw_chid, bool add,
 				bool wait_for_finish);
@@ -345,6 +346,9 @@ struct gpu_ops {
 		void (*device_info_data_parse)(struct gk20a *g,
 					u32 table_entry, u32 *inst_id,
 					u32 *pri_base, u32 *fault_id);
+		int (*tsg_bind_channel)(struct tsg_gk20a *tsg,
+				struct channel_gk20a *ch);
+		int (*tsg_unbind_channel)(struct channel_gk20a *ch);
 	} fifo;
 	struct pmu_v {
 		/*used for change of enum zbc update cmd id from ver 0 to ver1*/

drivers/gpu/nvgpu/gk20a/hal_gk20a.c

@@ -30,6 +30,7 @@
 #include "regops_gk20a.h"
 #include "therm_gk20a.h"
 #include "hw_proj_gk20a.h"
+#include "tsg_gk20a.h"
 
 static struct gpu_ops gk20a_ops = {
 	.clock_gating = {
@@ -142,6 +143,7 @@ int gk20a_init_hal(struct gk20a *g)
 	gk20a_init_regops(gops);
 	gk20a_init_debug_ops(gops);
 	gk20a_init_therm_ops(gops);
+	gk20a_init_tsg_ops(gops);
 	gops->name = "gk20a";
 	gops->chip_init_gpu_characteristics = gk20a_init_gpu_characteristics;
 	gops->get_litter_value = gk20a_get_litter_value;

drivers/gpu/nvgpu/gk20a/tsg_gk20a.c

@@ -37,13 +37,12 @@ bool gk20a_is_channel_marked_as_tsg(struct channel_gk20a *ch)
 
 int gk20a_enable_tsg(struct tsg_gk20a *tsg)
 {
+	struct gk20a *g = tsg->g;
 	struct channel_gk20a *ch;
 
 	mutex_lock(&tsg->ch_list_lock);
 	list_for_each_entry(ch, &tsg->ch_list, ch_entry) {
-		gk20a_writel(ch->g, ccsr_channel_r(ch->hw_chid),
-			gk20a_readl(ch->g, ccsr_channel_r(ch->hw_chid))
-			| ccsr_channel_enable_set_true_f());
+		g->ops.fifo.enable_channel(ch);
 	}
 	mutex_unlock(&tsg->ch_list_lock);
 
@@ -52,13 +51,12 @@ int gk20a_enable_tsg(struct tsg_gk20a *tsg)
 
 int gk20a_disable_tsg(struct tsg_gk20a *tsg)
 {
+	struct gk20a *g = tsg->g;
 	struct channel_gk20a *ch;
 
 	mutex_lock(&tsg->ch_list_lock);
 	list_for_each_entry(ch, &tsg->ch_list, ch_entry) {
-		gk20a_writel(ch->g, ccsr_channel_r(ch->hw_chid),
-			gk20a_readl(ch->g, ccsr_channel_r(ch->hw_chid))
-			| ccsr_channel_enable_clr_true_f());
+		g->ops.fifo.disable_channel(ch);
 	}
 	mutex_unlock(&tsg->ch_list_lock);
 
@@ -80,31 +78,37 @@ static bool gk20a_is_channel_active(struct gk20a *g, struct channel_gk20a *ch)
 	return false;
 }
 
+static int gk20a_tsg_bind_channel_fd(struct tsg_gk20a *tsg, int ch_fd)
+{
+	struct file *f = fget(ch_fd);
+	struct channel_gk20a *ch;
+	int err;
+
+	ch = gk20a_get_channel_from_file(ch_fd);
+	if (!ch)
+		return -EINVAL;
+	err = ch->g->ops.fifo.tsg_bind_channel(tsg, ch);
+	fput(f);
+	return err;
+}
+
 /*
  * API to mark channel as part of TSG
  *
  * Note that channel is not runnable when we bind it to TSG
  */
-static int gk20a_tsg_bind_channel(struct tsg_gk20a *tsg, int ch_fd)
+int gk20a_tsg_bind_channel(struct tsg_gk20a *tsg,
+			struct channel_gk20a *ch)
 {
-	struct file *f = fget(ch_fd);
-	struct channel_gk20a *ch;
-
 	gk20a_dbg_fn("");
 
-	ch = gk20a_get_channel_from_file(ch_fd);
-	if (!ch)
-		return -EINVAL;
-
 	/* check if channel is already bound to some TSG */
 	if (gk20a_is_channel_marked_as_tsg(ch)) {
-		fput(f);
 		return -EINVAL;
 	}
 
 	/* channel cannot be bound to TSG if it is already active */
 	if (gk20a_is_channel_active(tsg->g, ch)) {
-		fput(f);
 		return -EINVAL;
 	}
 
@@ -119,8 +123,6 @@ static int gk20a_tsg_bind_channel(struct tsg_gk20a *tsg, int ch_fd)
 	gk20a_dbg(gpu_dbg_fn, "BIND tsg:%d channel:%d\n",
 					tsg->tsgid, ch->hw_chid);
 
-	fput(f);
-
 	gk20a_dbg_fn("done");
 	return 0;
 }
@@ -494,7 +496,7 @@ long gk20a_tsg_dev_ioctl(struct file *filp, unsigned int cmd,
 			err = -EINVAL;
 			break;
 		}
-		err = gk20a_tsg_bind_channel(tsg, ch_fd);
+		err = gk20a_tsg_bind_channel_fd(tsg, ch_fd);
 		break;
 		}
 
@@ -539,7 +541,7 @@ long gk20a_tsg_dev_ioctl(struct file *filp, unsigned int cmd,
 			return err;
 		}
 		/* preempt TSG */
-		err = gk20a_fifo_preempt_tsg(g, tsg->tsgid);
+		err = g->ops.fifo.preempt_tsg(g, tsg->tsgid);
 		gk20a_idle(g->dev);
 		break;
 		}
@@ -600,3 +602,9 @@ long gk20a_tsg_dev_ioctl(struct file *filp, unsigned int cmd,
 
 	return err;
 }
+
+void gk20a_init_tsg_ops(struct gpu_ops *gops)
+{
+	gops->fifo.tsg_bind_channel = gk20a_tsg_bind_channel;
+	gops->fifo.tsg_unbind_channel = gk20a_tsg_unbind_channel;
+}

drivers/gpu/nvgpu/gk20a/tsg_gk20a.h

@@ -28,8 +28,7 @@ long gk20a_tsg_dev_ioctl(struct file *filp,
 			 unsigned int cmd, unsigned long arg);
 
 int gk20a_init_tsg_support(struct gk20a *g, u32 tsgid);
-
-int gk20a_tsg_unbind_channel(struct channel_gk20a *ch);
+void gk20a_init_tsg_ops(struct gpu_ops *gops);
 
 struct tsg_gk20a {
 	struct gk20a *g;
@@ -59,6 +58,9 @@ struct tsg_gk20a {
 
 int gk20a_enable_tsg(struct tsg_gk20a *tsg);
 int gk20a_disable_tsg(struct tsg_gk20a *tsg);
+int gk20a_tsg_bind_channel(struct tsg_gk20a *tsg,
+			struct channel_gk20a *ch);
+int gk20a_tsg_unbind_channel(struct channel_gk20a *ch);
 
 void gk20a_tsg_event_id_post_event(struct tsg_gk20a *tsg,
 				       int event_id);

drivers/gpu/nvgpu/gm20b/fifo_gm20b.c

@@ -142,6 +142,7 @@ void gm20b_init_fifo(struct gpu_ops *gops)
 	gops->fifo.channel_set_timeslice = gk20a_channel_set_timeslice;
 
 	gops->fifo.preempt_channel = gk20a_fifo_preempt_channel;
+	gops->fifo.preempt_tsg = gk20a_fifo_preempt_tsg;
 	gops->fifo.update_runlist = gk20a_fifo_update_runlist;
 	gops->fifo.trigger_mmu_fault = gm20b_fifo_trigger_mmu_fault;
 	gops->fifo.wait_engine_idle = gk20a_fifo_wait_engine_idle;

drivers/gpu/nvgpu/gm20b/hal_gm20b.c

@@ -211,6 +211,7 @@ int gm20b_init_hal(struct gk20a *g)
 	gm20b_init_debug_ops(gops);
 	gm20b_init_cde_ops(gops);
 	gm20b_init_therm_ops(gops);
+	gk20a_init_tsg_ops(gops);
 	gops->name = "gm20b";
 	gops->chip_init_gpu_characteristics = gk20a_init_gpu_characteristics;
 	gops->get_litter_value = gm20b_get_litter_value;

drivers/gpu/nvgpu/vgpu/fifo_vgpu.c

@@ -410,6 +410,30 @@ static int vgpu_fifo_preempt_channel(struct gk20a *g, u32 hw_chid)
 	return err;
 }
 
+static int vgpu_fifo_preempt_tsg(struct gk20a *g, u32 tsgid)
+{
+	struct gk20a_platform *platform = gk20a_get_platform(g->dev);
+	struct tegra_vgpu_cmd_msg msg;
+	struct tegra_vgpu_tsg_preempt_params *p =
+			&msg.params.tsg_preempt;
+	int err;
+
+	gk20a_dbg_fn("");
+
+	msg.cmd = TEGRA_VGPU_CMD_TSG_PREEMPT;
+	msg.handle = platform->virt_handle;
+	p->tsg_id = tsgid;
+	err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
+	err = err ? err : msg.ret;
+
+	if (err) {
+		gk20a_err(dev_from_gk20a(g),
+			"preempt tsg %u failed\n", tsgid);
+	}
+
+	return err;
+}
+
 static int vgpu_submit_runlist(u64 handle, u8 runlist_id, u16 *runlist,
 			u32 num_entries)
 {
@@ -680,6 +704,7 @@ void vgpu_init_fifo_ops(struct gpu_ops *gops)
 	gops->fifo.free_inst = vgpu_channel_free_inst;
 	gops->fifo.setup_ramfc = vgpu_channel_setup_ramfc;
 	gops->fifo.preempt_channel = vgpu_fifo_preempt_channel;
+	gops->fifo.preempt_tsg = vgpu_fifo_preempt_tsg;
 	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;

drivers/gpu/nvgpu/vgpu/gr_vgpu.c

@@ -445,6 +445,26 @@ static int vgpu_gr_ch_bind_gr_ctx(struct channel_gk20a *c)
 	return err;
 }
 
+static int vgpu_gr_tsg_bind_gr_ctx(struct tsg_gk20a *tsg)
+{
+	struct gk20a_platform *platform = gk20a_get_platform(tsg->g->dev);
+	struct gr_ctx_desc *gr_ctx = tsg->tsg_gr_ctx;
+	struct tegra_vgpu_cmd_msg msg = {0};
+	struct tegra_vgpu_tsg_bind_gr_ctx_params *p =
+					&msg.params.tsg_bind_gr_ctx;
+	int err;
+
+	msg.cmd = TEGRA_VGPU_CMD_TSG_BIND_GR_CTX;
+	msg.handle = platform->virt_handle;
+	p->tsg_id = tsg->tsgid;
+	p->gr_ctx_handle = gr_ctx->virt_ctx;
+	err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
+	err = err ? err : msg.ret;
+	WARN_ON(err);
+
+	return err;
+}
+
 static int vgpu_gr_alloc_obj_ctx(struct channel_gk20a  *c,
 				struct nvgpu_alloc_obj_ctx_args *args)
 {
@@ -472,32 +492,58 @@ static int vgpu_gr_alloc_obj_ctx(struct channel_gk20a  *c,
 	}
 	c->obj_class = args->class_num;
 
-	/* FIXME: add TSG support */
 	if (gk20a_is_channel_marked_as_tsg(c))
 		tsg = &f->tsg[c->tsgid];
 
-	/* allocate gr ctx buffer */
-	if (!ch_ctx->gr_ctx) {
-		err = g->ops.gr.alloc_gr_ctx(g, &c->ch_ctx.gr_ctx,
-					c->vm,
-					args->class_num,
-					args->flags);
-		if (!err)
-			err = vgpu_gr_ch_bind_gr_ctx(c);
-
-		if (err) {
+	if (!tsg) {
+		/* allocate gr ctx buffer */
+		if (!ch_ctx->gr_ctx) {
+			err = g->ops.gr.alloc_gr_ctx(g, &c->ch_ctx.gr_ctx,
+						c->vm,
+						args->class_num,
+						args->flags);
+			if (!err)
+				err = vgpu_gr_ch_bind_gr_ctx(c);
+			if (err) {
+				gk20a_err(dev_from_gk20a(g),
+					"fail to allocate gr ctx buffer");
+				goto out;
+			}
+		} else {
+			/*TBD: needs to be more subtle about which is
+			 * being allocated as some are allowed to be
+			 * allocated along same channel */
 			gk20a_err(dev_from_gk20a(g),
-				"fail to allocate gr ctx buffer");
+				"too many classes alloc'd on same channel");
+			err = -EINVAL;
 			goto out;
 		}
 	} else {
-		/*TBD: needs to be more subtle about which is
-		 * being allocated as some are allowed to be
-		 * allocated along same channel */
-		gk20a_err(dev_from_gk20a(g),
-			"too many classes alloc'd on same channel");
-		err = -EINVAL;
-		goto out;
+		if (!tsg->tsg_gr_ctx) {
+			tsg->vm = c->vm;
+			gk20a_vm_get(tsg->vm);
+			err = g->ops.gr.alloc_gr_ctx(g, &tsg->tsg_gr_ctx,
+						c->vm,
+						args->class_num,
+						args->flags);
+			if (!err)
+				err = vgpu_gr_tsg_bind_gr_ctx(tsg);
+			if (err) {
+				gk20a_err(dev_from_gk20a(g),
+					"fail to allocate TSG gr ctx buffer, err=%d", err);
+				gk20a_vm_put(tsg->vm);
+				tsg->vm = NULL;
+				goto out;
+			}
+		}
+
+		ch_ctx->gr_ctx = tsg->tsg_gr_ctx;
+		err = vgpu_gr_ch_bind_gr_ctx(c);
+		if (err) {
+			gk20a_err(dev_from_gk20a(g),
+				"fail to bind gr ctx buffer");
+			goto out;
+		}
 	}
 
 	/* commit gr ctx buffer */

drivers/gpu/nvgpu/vgpu/tsg_vgpu.c

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/tegra_vgpu.h>
+
+#include "gk20a/gk20a.h"
+#include "gk20a/channel_gk20a.h"
+#include "gk20a/platform_gk20a.h"
+#include "gk20a/tsg_gk20a.h"
+#include "vgpu.h"
+
+static int vgpu_tsg_bind_channel(struct tsg_gk20a *tsg,
+			struct channel_gk20a *ch)
+{
+	struct gk20a_platform *platform = gk20a_get_platform(tsg->g->dev);
+	struct tegra_vgpu_cmd_msg msg = {};
+	struct tegra_vgpu_tsg_bind_unbind_channel_params *p =
+				&msg.params.tsg_bind_unbind_channel;
+	int err;
+
+	gk20a_dbg_fn("");
+
+	err = gk20a_tsg_bind_channel(tsg, ch);
+	if (err)
+		return err;
+
+	msg.cmd = TEGRA_VGPU_CMD_TSG_BIND_CHANNEL;
+	msg.handle = platform->virt_handle;
+	p->tsg_id = tsg->tsgid;
+	p->ch_handle = ch->virt_ctx;
+	err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
+	err = err ? err : msg.ret;
+	if (err) {
+		gk20a_err(dev_from_gk20a(tsg->g),
+			"vgpu_tsg_bind_channel failed, ch %d tsgid %d",
+			ch->hw_chid, tsg->tsgid);
+		gk20a_tsg_unbind_channel(ch);
+	}
+
+	return err;
+}
+
+static int vgpu_tsg_unbind_channel(struct channel_gk20a *ch)
+{
+	struct gk20a_platform *platform = gk20a_get_platform(ch->g->dev);
+	struct tegra_vgpu_cmd_msg msg = {};
+	struct tegra_vgpu_tsg_bind_unbind_channel_params *p =
+				&msg.params.tsg_bind_unbind_channel;
+	int err;
+
+	gk20a_dbg_fn("");
+
+	err = gk20a_tsg_unbind_channel(ch);
+	if (err)
+		return err;
+
+	msg.cmd = TEGRA_VGPU_CMD_TSG_UNBIND_CHANNEL;
+	msg.handle = platform->virt_handle;
+	p->ch_handle = ch->virt_ctx;
+	err = vgpu_comm_sendrecv(&msg, sizeof(msg), sizeof(msg));
+	err = err ? err : msg.ret;
+	WARN_ON(err);
+
+	return err;
+}
+
+void vgpu_init_tsg_ops(struct gpu_ops *gops)
+{
+	gops->fifo.tsg_bind_channel = vgpu_tsg_bind_channel;
+	gops->fifo.tsg_unbind_channel = vgpu_tsg_unbind_channel;
+}

drivers/gpu/nvgpu/vgpu/vgpu.c

@@ -268,6 +268,7 @@ void vgpu_init_hal_common(struct gk20a *g)
 	vgpu_init_mm_ops(gops);
 	vgpu_init_debug_ops(gops);
 	vgpu_init_fecs_trace_ops(gops);
+	vgpu_init_tsg_ops(gops);
 	gops->chip_init_gpu_characteristics = gk20a_init_gpu_characteristics;
 }
 
@@ -340,8 +341,6 @@ int vgpu_pm_finalize_poweron(struct device *dev)
 		goto done;
 	}
 
-	g->gpu_characteristics.flags &= ~NVGPU_GPU_FLAGS_SUPPORT_TSG;
-
 	gk20a_ctxsw_trace_init(g);
 	gk20a_channel_resume(g);
 

drivers/gpu/nvgpu/vgpu/vgpu.h

@@ -1,7 +1,7 @@
 /*
  * Virtualized GPU Interfaces
  *
- * Copyright (c) 2014-2015, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2014-2016, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -47,6 +47,7 @@ void vgpu_init_gr_ops(struct gpu_ops *gops);
 void vgpu_init_ltc_ops(struct gpu_ops *gops);
 void vgpu_init_mm_ops(struct gpu_ops *gops);
 void vgpu_init_debug_ops(struct gpu_ops *gops);
+void vgpu_init_tsg_ops(struct gpu_ops *gops);
 int vgpu_init_mm_support(struct gk20a *g);
 int vgpu_init_gr_support(struct gk20a *g);
 int vgpu_init_fifo_support(struct gk20a *g);

include/linux/tegra_vgpu.h

@@ -88,6 +88,9 @@ enum {
 	TEGRA_VGPU_CMD_GR_CTX_FREE,
 	TEGRA_VGPU_CMD_CHANNEL_BIND_GR_CTX,
 	TEGRA_VGPU_CMD_TSG_BIND_GR_CTX,
+	TEGRA_VGPU_CMD_TSG_BIND_CHANNEL,
+	TEGRA_VGPU_CMD_TSG_UNBIND_CHANNEL,
+	TEGRA_VGPU_CMD_TSG_PREEMPT,
 };
 
 struct tegra_vgpu_connect_params {
@@ -361,6 +364,15 @@ struct tegra_vgpu_tsg_bind_gr_ctx_params {
 	u64 gr_ctx_handle;
 };
 
+struct tegra_vgpu_tsg_bind_unbind_channel_params {
+	u32 tsg_id;
+	u64 ch_handle;
+};
+
+struct tegra_vgpu_tsg_preempt_params {
+	u32 tsg_id;
+};
+
 struct tegra_vgpu_cmd_msg {
 	u32 cmd;
 	int ret;
@@ -397,6 +409,8 @@ struct tegra_vgpu_cmd_msg {
 		struct tegra_vgpu_gr_ctx_params gr_ctx;
 		struct tegra_vgpu_channel_bind_gr_ctx_params ch_bind_gr_ctx;
 		struct tegra_vgpu_tsg_bind_gr_ctx_params tsg_bind_gr_ctx;
+		struct tegra_vgpu_tsg_bind_unbind_channel_params tsg_bind_unbind_channel;
+		struct tegra_vgpu_tsg_preempt_params tsg_preempt;
 		char padding[192];
 	} params;
 };