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gpu: nvgpu: Cache channel state before dumping

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Split channel debug dump into two phases. In first phase we just copy
the data to a temporary buffer, and in second phase we dump the state
from the temporary buffer.

Change-Id: I2578b9fdaaa76f1230df7badbca9fcb5f3854e56
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/717886
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
This commit is contained in:
Terje Bergstrom
2015-03-16 10:00:32 -07:00
committed by Dan Willemsen
parent 1eded55286
commit 78d8f8fe36
1 changed files with 41 additions and 10 deletions
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51
drivers/gpu/nvgpu/gk20a/debug_gk20a.c
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@@ -34,6 +34,11 @@
unsigned int gk20a_debug_trace_cmdbuf;
static struct platform_device *gk20a_device;
struct ch_state {
int pid;
u8 inst_block[0];
};
static const char * const ccsr_chan_status_str[] = {
"idle",
"pending",
@@ -97,23 +102,25 @@ void gk20a_debug_output(struct gk20a_debug_output *o,
static void gk20a_debug_show_channel(struct gk20a *g,
struct gk20a_debug_output *o,
struct channel_gk20a *ch)
u32 hw_chid,
struct ch_state *ch_state)
{
u32 channel = gk20a_readl(g, ccsr_channel_r(ch->hw_chid));
u32 channel = gk20a_readl(g, ccsr_channel_r(hw_chid));
u32 status = ccsr_channel_status_v(channel);
u32 syncpointa, syncpointb;
void *inst_ptr;
inst_ptr = ch->inst_block.cpu_va;
if (!inst_ptr)
if (!ch_state)
return;
inst_ptr = &ch_state->inst_block[0];
syncpointa = gk20a_mem_rd32(inst_ptr, ram_fc_syncpointa_w());
syncpointb = gk20a_mem_rd32(inst_ptr, ram_fc_syncpointb_w());
gk20a_debug_output(o, "%d-%s, pid %d: ", ch->hw_chid,
ch->g->dev->name,
ch->pid);
gk20a_debug_output(o, "%d-%s, pid %d: ", hw_chid,
g->dev->name,
ch_state->pid);
gk20a_debug_output(o, "%s in use %s %s\n",
ccsr_channel_enable_v(channel) ? "" : "not",
ccsr_chan_status_str[status],
@@ -160,6 +167,8 @@ void gk20a_debug_show_dump(struct gk20a *g, struct gk20a_debug_output *o)
u32 chid;
int i, err;
struct ch_state **ch_state;
err = gk20a_busy(g->dev);
if (err) {
gk20a_debug_output(o, "failed to power on gpu: %d\n", err);
@@ -214,12 +223,34 @@ void gk20a_debug_show_dump(struct gk20a *g, struct gk20a_debug_output *o)
}
gk20a_debug_output(o, "\n");
ch_state = kzalloc(sizeof(*ch_state)
* f->num_channels, GFP_KERNEL);
if (!ch_state) {
gk20a_debug_output(o, "cannot alloc memory for channels\n");
goto done;
}
for (chid = 0; chid < f->num_channels; chid++) {
if (f->channel[chid].in_use) {
struct channel_gk20a *gpu_ch = &f->channel[chid];
gk20a_debug_show_channel(g, o, gpu_ch);
if (f->channel[chid].in_use)
ch_state[chid] = kmalloc(sizeof(struct ch_state) + ram_in_alloc_size_v(), GFP_KERNEL);
}
for (chid = 0; chid < f->num_channels; chid++) {
if (ch_state[chid] && f->channel[chid].inst_block.cpu_va) {
ch_state[chid]->pid = f->channel[chid].pid;
memcpy(&ch_state[chid]->inst_block[0],
f->channel[chid].inst_block.cpu_va,
ram_in_alloc_size_v());
}
}
for (chid = 0; chid < f->num_channels; chid++) {
if (ch_state[chid]) {
gk20a_debug_show_channel(g, o, chid, ch_state[chid]);
kfree(ch_state[chid]);
}
}
kfree(ch_state);
done:
gk20a_idle(g->dev);
}