On Mon, Mar 17, 2014 at 10:48:33PM -0700, Ben Widawsky wrote:
> There often is not enough memory to dump the full contents of the PPGTT.
> As a temporary bandage, to continue getting valuable basic PPGTT info,
> wrap the dangerous, memory hungry part inside of a new verbose version
> of the debugfs file.
>
> Also while here we can split out the ppgtt print function so it's more
> reusable.
>
> I'd really like to get ppgtt info into our error state, but I found it too
> difficult to make work in the limited time I have. Maybe Mika can find a way.
ppgtt_info is not printing out the user contexts - those are the
most interesting ones that should get dynamically allocated.
=0 ickle:/usr/src/linux$ git diff | cat
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
b/drivers/gpu/drm/i915/i915_debugfs.c
index 04d40fa..442a075 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1749,17 +1749,6 @@ static int i915_swizzle_info(struct seq_file *m, void
*data)
return 0;
}
-static int per_file_ctx(int id, void *ptr, void *data)
-{
- struct i915_hw_context *ctx = ptr;
- struct seq_file *m = data;
- struct i915_hw_ppgtt *ppgtt = ctx_to_ppgtt(ctx);
-
- ppgtt->debug_dump(ppgtt, m);
-
- return 0;
-}
-
static void gen8_ppgtt_info(struct seq_file *m, struct drm_device *dev, int
verbose)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@@ -1804,7 +1793,21 @@ static void print_ppgtt(struct seq_file *m, struct
i915_hw_ppgtt *ppgtt, const c
{
seq_printf(m, "%s:\n", name);
seq_printf(m, "pd gtt offset: 0x%08x\n", ppgtt->pd.pd_offset);
- seq_printf(m, "\tpd pages: %zu\n", gen6_ppgtt_count_pt_pages(ppgtt));
+ seq_printf(m, "\tpd pages: %zu / %d\n",
gen6_ppgtt_count_pt_pages(ppgtt), ppgtt->num_pd_entries);
+}
+
+static int per_file_ctx(int id, void *ptr, void *data)
+{
+ struct i915_hw_context *ctx = ptr;
+ struct seq_file *m = (void *)((unsigned long)data & ~1);
+ bool verbose = (unsigned long)data & 1;
+ struct i915_hw_ppgtt *ppgtt = ctx_to_ppgtt(ctx);
+
+ print_ppgtt(m, ppgtt, ctx->id == DEFAULT_CONTEXT_ID ? "Default context"
: "User context");
+ if (verbose)
+ ppgtt->debug_dump(ppgtt, m);
+
+ return 0;
}
static void gen6_ppgtt_info(struct seq_file *m, struct drm_device *dev, bool
verbose)
@@ -1838,14 +1841,11 @@ static void gen6_ppgtt_info(struct seq_file *m, struct
drm_device *dev, bool ver
list_for_each_entry_reverse(file, &dev->filelist, lhead) {
struct drm_i915_file_private *file_priv = file->driver_priv;
- struct i915_hw_ppgtt *pvt_ppgtt;
- pvt_ppgtt = ctx_to_ppgtt(file_priv->private_default_ctx);
seq_printf(m, "proc: %s\n",
get_pid_task(file->pid, PIDTYPE_PID)->comm);
- print_ppgtt(m, pvt_ppgtt, "Default context");
- if (verbose)
- idr_for_each(&file_priv->context_idr, per_file_ctx, m);
+ idr_for_each(&file_priv->context_idr, per_file_ctx,
+ (void *)((unsigned long)m | verbose));
}
}
--
Chris Wilson, Intel Open Source Technology Centre
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