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author | Nirmoy Das <nirmoy.das@intel.com> | 2023-09-26 11:37:38 +0300 |
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committer | Nirmoy Das <nirmoy.das@intel.com> | 2023-09-30 14:49:22 +0300 |
commit | 0e514878486053363f8b2a806525fe67ae692827 (patch) | |
tree | 45426be8e22bdf47e7195c559317e36cf09cefb1 /drivers/gpu/drm/i915/i915_scatterlist.h | |
parent | b352749936806c9d5ed6a6021d84c1df4d1df3da (diff) | |
download | linux-0e514878486053363f8b2a806525fe67ae692827.tar.xz |
drm/i915: Implement for_each_sgt_daddr_next
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
Diffstat (limited to 'drivers/gpu/drm/i915/i915_scatterlist.h')
-rw-r--r-- | drivers/gpu/drm/i915/i915_scatterlist.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_scatterlist.h b/drivers/gpu/drm/i915/i915_scatterlist.h index 5a10c1a31183..6cf8a298849f 100644 --- a/drivers/gpu/drm/i915/i915_scatterlist.h +++ b/drivers/gpu/drm/i915/i915_scatterlist.h @@ -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 |