[Intel-gfx] [PATCH] tests/prime_self_import: export/import a second gem buffer

[Imre Deak]

On Wed, 2013-04-17 at 19:06 +0200, Daniel Vetter wrote:
> On Wed, Apr 17, 2013 at 07:10:00PM +0300, Imre Deak wrote:
> > Signed-off-by: Imre Deak <imre.deak at intel.com>
> 
> I'm a bit confused what this does ... can you please elaborate?

It creates a second GEM buffer on fd1, exports it, imports it on fd2 and
check if the imported buffer contents matches the original one.

--Imre

> -Daniel
> 
> > ---
> >  tests/prime_self_import.c |   33 ++++++++++++++++++++++-----------
> >  1 file changed, 22 insertions(+), 11 deletions(-)
> > 
> > diff --git a/tests/prime_self_import.c b/tests/prime_self_import.c
> > index 111ed4d..a17e942 100644
> > --- a/tests/prime_self_import.c
> > +++ b/tests/prime_self_import.c
> > @@ -48,11 +48,13 @@
> >  
> >  #define BO_SIZE (16*1024)
> >  
> > +static char counter1;
> > +static char counter2;
> > +
> >  static void
> > -check_bo(int fd1, uint32_t handle1, int fd2, uint32_t handle2)
> > +check_bo(int fd1, uint32_t handle1, int fd2, uint32_t handle2, char *counter)
> >  {
> >  	char *ptr1, *ptr2;
> > -	static char counter = 0;
> >  	int i;
> >  
> >  	ptr1 = gem_mmap(fd1, handle1, BO_SIZE, PROT_READ | PROT_WRITE);
> > @@ -62,13 +64,13 @@ check_bo(int fd1, uint32_t handle1, int fd2, uint32_t handle2)
> >  
> >  	/* check whether it's still our old object first. */
> >  	for (i = 0; i < BO_SIZE; i++) {
> > -		assert(ptr1[i] == counter);
> > -		assert(ptr2[i] == counter);
> > +		assert(ptr1[i] == *counter);
> > +		assert(ptr2[i] == *counter);
> >  	}
> >  
> > -	counter++;
> > +	(*counter)++;
> >  
> > -	memset(ptr1, counter, BO_SIZE);
> > +	memset(ptr1, *counter, BO_SIZE);
> >  	assert(memcmp(ptr1, ptr2, BO_SIZE) == 0);
> >  
> >  	munmap(ptr1, BO_SIZE);
> > @@ -79,17 +81,19 @@ int main(int argc, char **argv)
> >  {
> >  	int fd1, fd2;
> >  	uint32_t handle, handle_import1, handle_import2, handle_selfimport;
> > +	uint32_t handle2;
> >  	int dma_buf_fd;
> >  
> >  	fd1 = drm_open_any();
> >  	fd2 = drm_open_any();
> >  
> >  	handle = gem_create(fd1, BO_SIZE);
> > +	handle2 = gem_create(fd1, BO_SIZE);
> >  
> >  	dma_buf_fd = prime_handle_to_fd(fd1, handle);
> >  	handle_import1 = prime_fd_to_handle(fd2, dma_buf_fd);
> >  
> > -	check_bo(fd1, handle, fd2, handle_import1);
> > +	check_bo(fd1, handle, fd2, handle_import1, &counter1);
> >  
> >  	/* reimport should give us the same handle so that userspace can check
> >  	 * whether it has that bo already somewhere. */
> > @@ -102,10 +106,17 @@ int main(int argc, char **argv)
> >  
> >  	/* close dma_buf, check whether nothing disappears. */
> >  	close(dma_buf_fd);
> > -	check_bo(fd1, handle, fd2, handle_import1);
> > +	check_bo(fd1, handle, fd2, handle_import1, &counter1);
> >  
> >  	gem_close(fd1, handle);
> > -	check_bo(fd2, handle_import1, fd2, handle_import1);
> > +	check_bo(fd2, handle_import1, fd2, handle_import1, &counter1);
> > +
> > +	dma_buf_fd = prime_handle_to_fd(fd1, handle2);
> > +	handle = prime_fd_to_handle(fd2, dma_buf_fd);
> > +	check_bo(fd1, handle2, fd2, handle, &counter2);
> > +	gem_close(fd2, handle);
> > +	gem_close(fd1, handle2);
> > +	close(dma_buf_fd);
> >  
> >  	/* re-import into old exporter */
> >  	dma_buf_fd = prime_handle_to_fd(fd2, handle_import1);
> > @@ -113,11 +124,11 @@ int main(int argc, char **argv)
> >  	gem_close(fd2, handle_import1);
> >  	handle = prime_fd_to_handle(fd1, dma_buf_fd);
> >  	handle_import1 = prime_fd_to_handle(fd2, dma_buf_fd);
> > -	check_bo(fd1, handle, fd2, handle_import1);
> > +	check_bo(fd1, handle, fd2, handle_import1, &counter1);
> >  
> >  	/* Completely rip out exporting fd. */
> >  	close(fd1);
> > -	check_bo(fd2, handle_import1, fd2, handle_import1);
> > +	check_bo(fd2, handle_import1, fd2, handle_import1, &counter1);
> >  
> >  	return 0;
> >  }
> > -- 
> > 1.7.10.4
> > 
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