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drm/i915: Start chopping up the GPU error capture

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In the near future, we will want to start a GPU error capture from a new
context, from inside the softirq region of a forced preemption. To do
so requires us to break up the monolithic error capture to provide new
entry points with finer control; in particular focusing on one
engine/gt, and being able to compose an error state from little pieces
of HW capture.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Andi Shyti <andi.shyti@intel.com>
Acked-by: Andi Shyti <andi.shyti@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200110123059.1348712-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2020-01-10 12:30:56 +00:00
parent 8ccfc20a7d
commit 742379c0c4
11 changed files with 905 additions and 701 deletions
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6
drivers/gpu/drm/i915/i915_sysfs.c
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@@ -498,15 +498,15 @@ static ssize_t error_state_read(struct file *filp, struct kobject *kobj,
struct device *kdev = kobj_to_dev(kobj);
struct drm_i915_private *i915 = kdev_minor_to_i915(kdev);
struct i915_gpu_state *gpu;
struct i915_gpu_coredump *gpu;
ssize_t ret;
gpu = i915_first_error_state(i915);
if (IS_ERR(gpu)) {
ret = PTR_ERR(gpu);
} else if (gpu) {
ret = i915_gpu_state_copy_to_buffer(gpu, buf, off, count);
i915_gpu_state_put(gpu);
ret = i915_gpu_coredump_copy_to_buffer(gpu, buf, off, count);
i915_gpu_coredump_put(gpu);
} else {
const char *str = "No error state collected\n";
size_t len = strlen(str);