Commit 0e514878 authored by Nirmoy Das's avatar Nirmoy Das
Browse files

drm/i915: Implement for_each_sgt_daddr_next 



Implement a way to iterate over sgt with pre-initialized
sgt_iter state.

Signed-off-by: default avatarNirmoy Das <nirmoy.das@intel.com>
Reviewed-by: default avatarOak Zeng <oak.zeng@intel.com>
Reviewed-by: default avatarAndi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230926083742.14740-4-nirmoy.das@intel.com
parent b3527499

drivers/gpu/drm/i915/gt/intel_gtt.h

+3 −0
Original line number Diff line number Diff line
@@ -171,6 +171,9 @@ struct intel_gt; 
#define for_each_sgt_daddr(__dp, __iter, __sgt) \

	__for_each_sgt_daddr(__dp, __iter, __sgt, I915_GTT_PAGE_SIZE)



#define for_each_sgt_daddr_next(__dp, __iter) \

	__for_each_daddr_next(__dp, __iter, I915_GTT_PAGE_SIZE)



struct i915_page_table {

	struct drm_i915_gem_object *base;

	union {

drivers/gpu/drm/i915/i915_scatterlist.h

+10 −0
Original line number Diff line number Diff line
@@ -91,6 +91,16 @@ static inline struct scatterlist *__sg_next(struct scatterlist *sg) 
	     ((__dp) = (__iter).dma + (__iter).curr), (__iter).sgp;	\

	     (((__iter).curr += (__step)) >= (__iter).max) ?		\

	     (__iter) = __sgt_iter(__sg_next((__iter).sgp), true), 0 : 0)

/**

 * __for_each_daddr_next - iterates over the device addresses with pre-initialized iterator.

 * @__dp:	Device address (output)

 * @__iter:	'struct sgt_iter' (iterator state, external)

 * @__step:	step size

 */

#define __for_each_daddr_next(__dp, __iter, __step)                  \

	for (; ((__dp) = (__iter).dma + (__iter).curr), (__iter).sgp;   \

	     (((__iter).curr += (__step)) >= (__iter).max) ?            \

	     (__iter) = __sgt_iter(__sg_next((__iter).sgp), true), 0 : 0)



/**

 * for_each_sgt_page - iterate over the pages of the given sg_table