[PATCH] drm/xe: Add outer runtime_pm protection to xe_live_ktest at xe_dma_buf
Rodrigo Vivi
rodrigo.vivi at intel.com
Wed Apr 17 20:12:22 UTC 2024
On Wed, Apr 17, 2024 at 08:10:00PM +0000, Matthew Brost wrote:
> On Wed, Apr 17, 2024 at 03:34:11PM -0400, Rodrigo Vivi wrote:
> > Any kunit doing any memory access should get their own runtime_pm
>
> So maybe we grab a ref for any live kunit tests in a generic way?
Yeap, I wished to have something like that so we don't risk end up
with missing cases like this, but I couldn't find a generic way.
Right now every other kunit is protected. This is the only one left
behind. Perhaps we should move with this series as is and then
have a follow up with a generic entry for all kunit tests on
top?
>
> Matt
>
> > outer references since they don't use the standard driver API
> > entries. In special this dma_buf from the same driver.
> >
> > Found by pre-merge CI on adding WARN calls for unprotected
> > inner callers:
> >
> > <6> [318.639739] # xe_dma_buf_kunit: running xe_test_dmabuf_import_same_driver
> > <4> [318.639957] ------------[ cut here ]------------
> > <4> [318.639967] xe 0000:4d:00.0: Missing outer runtime PM protection
> > <4> [318.640049] WARNING: CPU: 117 PID: 3832 at drivers/gpu/drm/xe/xe_pm.c:533 xe_pm_runtime_get_noresume+0x48/0x60 [xe]
> >
> > Cc: Matthew Auld <matthew.auld at intel.com>
> > Cc: Francois Dugast <francois.dugast at intel.com>
> > Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
> > ---
> > drivers/gpu/drm/xe/tests/xe_dma_buf.c | 3 +++
> > 1 file changed, 3 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/xe/tests/xe_dma_buf.c b/drivers/gpu/drm/xe/tests/xe_dma_buf.c
> > index d54dd5b43007..e7f9b531c465 100644
> > --- a/drivers/gpu/drm/xe/tests/xe_dma_buf.c
> > +++ b/drivers/gpu/drm/xe/tests/xe_dma_buf.c
> > @@ -12,6 +12,7 @@
> > #include "tests/xe_pci_test.h"
> >
> > #include "xe_pci.h"
> > +#include "xe_pm.h"
> >
> > static bool p2p_enabled(struct dma_buf_test_params *params)
> > {
> > @@ -259,6 +260,7 @@ static int dma_buf_run_device(struct xe_device *xe)
> > const struct dma_buf_test_params *params;
> > struct kunit *test = xe_cur_kunit();
> >
> > + xe_pm_runtime_get(xe);
> > for (params = test_params; params->mem_mask; ++params) {
> > struct dma_buf_test_params p = *params;
> >
> > @@ -266,6 +268,7 @@ static int dma_buf_run_device(struct xe_device *xe)
> > test->priv = &p;
> > xe_test_dmabuf_import_same_driver(xe);
> > }
> > + xe_pm_runtime_put(xe);
> >
> > /* A non-zero return would halt iteration over driver devices */
> > return 0;
> > --
> > 2.44.0
> >
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