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drm/i915: Move context management under GEM

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Keep track of the GEM contexts underneath i915->gem.contexts and assign
them their own lock for the purposes of list management.

v2: Focus on lock tracking; ctx->vm is protected by ctx->mutex
v3: Correct split with removal of logical HW ID

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191004134015.13204-15-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2019-10-04 14:40:09 +01:00
parent 2935ed5339
commit a4e7ccdac3
28 changed files with 394 additions and 354 deletions
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50
drivers/gpu/drm/i915/i915_debugfs.c
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@@ -316,12 +316,18 @@ static void print_context_stats(struct seq_file *m,
struct drm_i915_private *i915)
{
struct file_stats kstats = {};
struct i915_gem_context *ctx;
struct i915_gem_context *ctx, *cn;
list_for_each_entry(ctx, &i915->contexts.list, link) {
spin_lock(&i915->gem.contexts.lock);
list_for_each_entry_safe(ctx, cn, &i915->gem.contexts.list, link) {
struct i915_gem_engines_iter it;
struct intel_context *ce;
if (!kref_get_unless_zero(&ctx->ref))
continue;
spin_unlock(&i915->gem.contexts.lock);
for_each_gem_engine(ce,
i915_gem_context_lock_engines(ctx), it) {
intel_context_lock_pinned(ce);
@@ -338,7 +344,9 @@ static void print_context_stats(struct seq_file *m,
i915_gem_context_unlock_engines(ctx);
if (!IS_ERR_OR_NULL(ctx->file_priv)) {
struct file_stats stats = { .vm = ctx->vm, };
struct file_stats stats = {
.vm = rcu_access_pointer(ctx->vm),
};
struct drm_file *file = ctx->file_priv->file;
struct task_struct *task;
char name[80];
@@ -355,7 +363,12 @@ static void print_context_stats(struct seq_file *m,
print_file_stats(m, name, stats);
}
spin_lock(&i915->gem.contexts.lock);
list_safe_reset_next(ctx, cn, link);
i915_gem_context_put(ctx);
}
spin_unlock(&i915->gem.contexts.lock);
print_file_stats(m, "[k]contexts", kstats);
}
@@ -363,7 +376,6 @@ static void print_context_stats(struct seq_file *m,
static int i915_gem_object_info(struct seq_file *m, void *data)
{
struct drm_i915_private *i915 = node_to_i915(m->private);
int ret;
seq_printf(m, "%u shrinkable [%u free] objects, %llu bytes\n",
i915->mm.shrink_count,
@@ -372,12 +384,7 @@ static int i915_gem_object_info(struct seq_file *m, void *data)
seq_putc(m, '\n');
ret = mutex_lock_interruptible(&i915->drm.struct_mutex);
if (ret)
return ret;
print_context_stats(m, i915);
mutex_unlock(&i915->drm.struct_mutex);
return 0;
}
@@ -1579,19 +1586,19 @@ static void describe_ctx_ring(struct seq_file *m, struct intel_ring *ring)
static int i915_context_status(struct seq_file *m, void *unused)
{
struct drm_i915_private *dev_priv = node_to_i915(m->private);
struct drm_device *dev = &dev_priv->drm;
struct i915_gem_context *ctx;
int ret;
struct drm_i915_private *i915 = node_to_i915(m->private);
struct i915_gem_context *ctx, *cn;
ret = mutex_lock_interruptible(&dev->struct_mutex);
if (ret)
return ret;
list_for_each_entry(ctx, &dev_priv->contexts.list, link) {
spin_lock(&i915->gem.contexts.lock);
list_for_each_entry_safe(ctx, cn, &i915->gem.contexts.list, link) {
struct i915_gem_engines_iter it;
struct intel_context *ce;
if (!kref_get_unless_zero(&ctx->ref))
continue;
spin_unlock(&i915->gem.contexts.lock);
seq_puts(m, "HW context ");
if (ctx->pid) {
struct task_struct *task;
@@ -1626,9 +1633,12 @@ static int i915_context_status(struct seq_file *m, void *unused)
i915_gem_context_unlock_engines(ctx);
seq_putc(m, '\n');
}
mutex_unlock(&dev->struct_mutex);
spin_lock(&i915->gem.contexts.lock);
list_safe_reset_next(ctx, cn, link);
i915_gem_context_put(ctx);
}
spin_unlock(&i915->gem.contexts.lock);
return 0;
}