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drm/i915: Implement for_each_sgt_daddr_next

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

Signed-off-by: Nirmoy Das <nirmoy.das@intel.com>
Reviewed-by: Oak Zeng <oak.zeng@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230926083742.14740-4-nirmoy.das@intel.com
This commit is contained in:
Nirmoy Das 2023-09-26 10:37:38 +02:00
parent b352749936
commit 0e51487848
2 changed files with 13 additions and 0 deletions
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3
drivers/gpu/drm/i915/gt/intel_gtt.h
View file

@ -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 {

10
drivers/gpu/drm/i915/i915_scatterlist.h
View file

@ -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