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gpu: nvgpu: IOCTL to suspend/resume context

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Add below IOCTL to suspend/resume a context
NVGPU_DBG_GPU_IOCTL_SUSPEND_RESUME_CONTEXTS:

Suspend sequence :
- disable ctxsw
- loop through list of channels
- if channel is ctx resident, suspend all SMs
- otherwise, disable channel/TSG
- enable ctxsw

Resume sequence :
- disable ctxsw
- loop through list of channels
- if channel is ctx resident, resume all SMs
- otherwise, enable channel/TSG
- enable ctxsw

Bug 200156699

Change-Id: Iacf1bf7877b67ddf87cc6891c37c758a4644b014
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: http://git-master/r/1120332
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
This commit is contained in:
Deepak Nibade
2015-12-21 15:21:49 +05:30
committed by Terje Bergstrom
parent dfac8ce704
commit b63c4bced5
6 changed files with 196 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

71
drivers/gpu/nvgpu/gk20a/dbg_gpu_gk20a.c
View File

@@ -780,6 +780,42 @@ err_free:
return err;
}
static int
nvgpu_dbg_gpu_ioctl_suspend_resume_contexts(struct dbg_session_gk20a *dbg_s,
struct nvgpu_dbg_gpu_suspend_resume_contexts_args *args)
{
struct gk20a *g = dbg_s->g;
int err = 0;
int ctx_resident_ch_fd = -1;
err = gk20a_busy(g->dev);
if (err)
return err;
switch (args->action) {
case NVGPU_DBG_GPU_SUSPEND_ALL_CONTEXTS:
err = g->ops.gr.suspend_contexts(g, dbg_s,
&ctx_resident_ch_fd);
break;
case NVGPU_DBG_GPU_RESUME_ALL_CONTEXTS:
err = gr_gk20a_resume_contexts(g, dbg_s,
&ctx_resident_ch_fd);
break;
}
if (ctx_resident_ch_fd < 0) {
args->is_resident_context = 0;
} else {
args->is_resident_context = 1;
args->resident_context_fd = ctx_resident_ch_fd;
}
gk20a_idle(g->dev);
return err;
}
long gk20a_dbg_gpu_dev_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
@@ -897,6 +933,11 @@ long gk20a_dbg_gpu_dev_ioctl(struct file *filp, unsigned int cmd,
(struct nvgpu_dbg_gpu_unbind_channel_args *)buf);
break;
case NVGPU_DBG_GPU_IOCTL_SUSPEND_RESUME_CONTEXTS:
err = nvgpu_dbg_gpu_ioctl_suspend_resume_contexts(dbg_s,
(struct nvgpu_dbg_gpu_suspend_resume_contexts_args *)buf);
break;
default:
gk20a_err(dev_from_gk20a(g),
"unrecognized dbg gpu ioctl cmd: 0x%x",
@@ -1222,7 +1263,6 @@ static int nvgpu_dbg_gpu_ioctl_suspend_resume_sm(
{
struct gk20a *g = get_gk20a(dbg_s->dev);
struct channel_gk20a *ch;
bool ch_is_curr_ctx;
int err = 0, action = args->mode;
gk20a_dbg(gpu_dbg_fn | gpu_dbg_gpu_dbg, "action: %d", args->mode);
@@ -1234,10 +1274,6 @@ static int nvgpu_dbg_gpu_ioctl_suspend_resume_sm(
mutex_lock(&g->dbg_sessions_lock);
/* Suspend GPU context switching */
/* Disable channel switching.
* at that point the hardware state can be inspected to
* determine if the context we're interested in is current.
*/
err = gr_gk20a_disable_ctxsw(g);
if (err) {
gk20a_err(dev_from_gk20a(g), "unable to stop gr ctxsw");
@@ -1245,40 +1281,23 @@ static int nvgpu_dbg_gpu_ioctl_suspend_resume_sm(
goto clean_up;
}
/* find out whether the current channel is resident */
ch_is_curr_ctx = gk20a_is_channel_ctx_resident(ch);
if (ch_is_curr_ctx) {
switch (action) {
case NVGPU_DBG_GPU_SUSPEND_ALL_SMS:
gk20a_suspend_all_sms(g, 0, false);
gr_gk20a_suspend_context(ch);
break;
case NVGPU_DBG_GPU_RESUME_ALL_SMS:
gk20a_resume_all_sms(g);
gr_gk20a_resume_context(ch);
break;
}
} else {
switch (action) {
case NVGPU_DBG_GPU_SUSPEND_ALL_SMS:
/* Disable the channel */
channel_gk20a_disable(ch);
break;
case NVGPU_DBG_GPU_RESUME_ALL_SMS:
/* Enable the channel */
channel_gk20a_enable(ch);
break;
}
}
/* Resume GPU context switching */
err = gr_gk20a_enable_ctxsw(g);
if (err)
gk20a_err(dev_from_gk20a(g), "unable to restart ctxsw!\n");
clean_up:
clean_up:
mutex_unlock(&g->dbg_sessions_lock);
return err;
}

3
drivers/gpu/nvgpu/gk20a/gk20a.h
View File

@@ -248,6 +248,9 @@ struct gpu_ops {
sm_error_state);
int (*clear_sm_error_state)(struct gk20a *g,
struct channel_gk20a *ch, u32 sm_id);
int (*suspend_contexts)(struct gk20a *g,
struct dbg_session_gk20a *dbg_s,
int *ctx_resident_ch_fd);
} gr;
const char *name;
struct {

118
drivers/gpu/nvgpu/gk20a/gr_gk20a.c
View File

@@ -8458,6 +8458,123 @@ static void gr_gk20a_get_access_map(struct gk20a *g,
*num_entries = ARRAY_SIZE(wl_addr_gk20a);
}
/*
* gr_gk20a_suspend_context()
* This API should be called with dbg_session lock held
* and ctxsw disabled
* Returns bool value indicating if context was resident
* or not
*/
bool gr_gk20a_suspend_context(struct channel_gk20a *ch)
{
struct gk20a *g = ch->g;
bool ctx_resident = false;
if (gk20a_is_channel_ctx_resident(ch)) {
gk20a_suspend_all_sms(g, 0, false);
ctx_resident = true;
} else {
gk20a_disable_channel_tsg(g, ch);
}
return ctx_resident;
}
bool gr_gk20a_resume_context(struct channel_gk20a *ch)
{
struct gk20a *g = ch->g;
bool ctx_resident = false;
if (gk20a_is_channel_ctx_resident(ch)) {
gk20a_resume_all_sms(g);
ctx_resident = true;
} else {
gk20a_enable_channel_tsg(g, ch);
}
return ctx_resident;
}
int gr_gk20a_suspend_contexts(struct gk20a *g,
struct dbg_session_gk20a *dbg_s,
int *ctx_resident_ch_fd)
{
int local_ctx_resident_ch_fd = -1;
bool ctx_resident;
struct channel_gk20a *ch;
struct dbg_session_channel_data *ch_data;
int err = 0;
mutex_lock(&g->dbg_sessions_lock);
err = gr_gk20a_disable_ctxsw(g);
if (err) {
gk20a_err(dev_from_gk20a(g), "unable to stop gr ctxsw");
goto clean_up;
}
mutex_lock(&dbg_s->ch_list_lock);
list_for_each_entry(ch_data, &dbg_s->ch_list, ch_entry) {
ch = g->fifo.channel + ch_data->chid;
ctx_resident = gr_gk20a_suspend_context(ch);
if (ctx_resident)
local_ctx_resident_ch_fd = ch_data->channel_fd;
}
mutex_unlock(&dbg_s->ch_list_lock);
err = gr_gk20a_enable_ctxsw(g);
if (err)
gk20a_err(dev_from_gk20a(g), "unable to restart ctxsw!\n");
*ctx_resident_ch_fd = local_ctx_resident_ch_fd;
clean_up:
mutex_unlock(&g->dbg_sessions_lock);
return err;
}
int gr_gk20a_resume_contexts(struct gk20a *g,
struct dbg_session_gk20a *dbg_s,
int *ctx_resident_ch_fd)
{
int local_ctx_resident_ch_fd = -1;
bool ctx_resident;
struct channel_gk20a *ch;
int err = 0;
struct dbg_session_channel_data *ch_data;
mutex_lock(&g->dbg_sessions_lock);
err = gr_gk20a_disable_ctxsw(g);
if (err) {
gk20a_err(dev_from_gk20a(g), "unable to stop gr ctxsw");
goto clean_up;
}
list_for_each_entry(ch_data, &dbg_s->ch_list, ch_entry) {
ch = g->fifo.channel + ch_data->chid;
ctx_resident = gr_gk20a_resume_context(ch);
if (ctx_resident)
local_ctx_resident_ch_fd = ch_data->channel_fd;
}
err = gr_gk20a_enable_ctxsw(g);
if (err)
gk20a_err(dev_from_gk20a(g), "unable to restart ctxsw!\n");
*ctx_resident_ch_fd = local_ctx_resident_ch_fd;
clean_up:
mutex_unlock(&g->dbg_sessions_lock);
return err;
}
void gk20a_init_gr_ops(struct gpu_ops *gops)
{
gops->gr.access_smpc_reg = gr_gk20a_access_smpc_reg;
@@ -8522,4 +8639,5 @@ void gk20a_init_gr_ops(struct gpu_ops *gops)
gops->gr.record_sm_error_state = gk20a_gr_record_sm_error_state;
gops->gr.update_sm_error_state = gk20a_gr_update_sm_error_state;
gops->gr.clear_sm_error_state = gk20a_gr_clear_sm_error_state;
gops->gr.suspend_contexts = gr_gk20a_suspend_contexts;
}

9
drivers/gpu/nvgpu/gk20a/gr_gk20a.h
View File

@@ -614,4 +614,13 @@ int gr_gk20a_get_ctx_id(struct gk20a *g,
u32 gk20a_mask_hww_warp_esr(u32 hww_warp_esr);
bool gr_gk20a_suspend_context(struct channel_gk20a *ch);
bool gr_gk20a_resume_context(struct channel_gk20a *ch);
int gr_gk20a_suspend_contexts(struct gk20a *g,
struct dbg_session_gk20a *dbg_s,
int *ctx_resident_ch_fd);
int gr_gk20a_resume_contexts(struct gk20a *g,
struct dbg_session_gk20a *dbg_s,
int *ctx_resident_ch_fd);
#endif /*__GR_GK20A_H__*/

1
drivers/gpu/nvgpu/gm20b/gr_gm20b.c
View File

@@ -1397,4 +1397,5 @@ void gm20b_init_gr(struct gpu_ops *gops)
gops->gr.record_sm_error_state = gm20b_gr_record_sm_error_state;
gops->gr.update_sm_error_state = gm20b_gr_update_sm_error_state;
gops->gr.clear_sm_error_state = gm20b_gr_clear_sm_error_state;
gops->gr.suspend_contexts = gr_gk20a_suspend_contexts;
}

16
include/uapi/linux/nvgpu.h
View File

@@ -738,8 +738,22 @@ struct nvgpu_dbg_gpu_unbind_channel_args {
_IOW(NVGPU_DBG_GPU_IOCTL_MAGIC, 17, struct nvgpu_dbg_gpu_unbind_channel_args)
#define NVGPU_DBG_GPU_SUSPEND_ALL_CONTEXTS 1
#define NVGPU_DBG_GPU_RESUME_ALL_CONTEXTS 2
struct nvgpu_dbg_gpu_suspend_resume_contexts_args {
__u32 action;
__u32 is_resident_context;
__s32 resident_context_fd;
__u32 padding;
};
#define NVGPU_DBG_GPU_IOCTL_SUSPEND_RESUME_CONTEXTS \
_IOWR(NVGPU_DBG_GPU_IOCTL_MAGIC, 18, struct nvgpu_dbg_gpu_suspend_resume_contexts_args)
#define NVGPU_DBG_GPU_IOCTL_LAST \
_IOC_NR(NVGPU_DBG_GPU_IOCTL_UNBIND_CHANNEL)
_IOC_NR(NVGPU_DBG_GPU_IOCTL_SUSPEND_RESUME_CONTEXTS)
#define NVGPU_DBG_GPU_IOCTL_MAX_ARG_SIZE \
sizeof(struct nvgpu_dbg_gpu_perfbuf_map_args)