| Message ID | 20210618133150.700375-2-matthew.auld@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/2] drm/i915/selftests: add back the selftest() hook for the buddy | expand |
On 6/18/21 3:31 PM, Matthew Auld wrote: > Looks like it got lost along the way, so add it back. This is needed for > the region query uAPI where we need to report an accurate available size > for lmem. Hmm. How is this uAPI intended to work in a multi-client environment where the returned value can be nothing but a snapshot of the current state, that can't be relied upon? > This time around let's push it directly into the allocator, which > simplifies things, like not having to care about internal fragmentation, > or having to remember to track things for all possible interfaces that > might want to allocate or reserve pages. > > Signed-off-by: Matthew Auld <matthew.auld@intel.com> > Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com> > --- > drivers/gpu/drm/i915/i915_buddy.c | 6 ++++++ > drivers/gpu/drm/i915/i915_buddy.h | 1 + > drivers/gpu/drm/i915/i915_debugfs.c | 5 +++-- > drivers/gpu/drm/i915/i915_query.c | 2 +- > drivers/gpu/drm/i915/i915_ttm_buddy_manager.c | 13 +++++++++++++ > drivers/gpu/drm/i915/i915_ttm_buddy_manager.h | 2 ++ > drivers/gpu/drm/i915/intel_memory_region.c | 8 ++++++++ > drivers/gpu/drm/i915/intel_memory_region.h | 4 ++++ > 8 files changed, 38 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/i915/i915_buddy.c b/drivers/gpu/drm/i915/i915_buddy.c > index 29dd7d0310c1..27cd2487a18f 100644 > --- a/drivers/gpu/drm/i915/i915_buddy.c > +++ b/drivers/gpu/drm/i915/i915_buddy.c > @@ -80,6 +80,7 @@ int i915_buddy_init(struct i915_buddy_mm *mm, u64 size, u64 chunk_size) > size = round_down(size, chunk_size); > > mm->size = size; > + mm->avail = size; > mm->chunk_size = chunk_size; > mm->max_order = ilog2(size) - ilog2(chunk_size); > > @@ -159,6 +160,8 @@ void i915_buddy_fini(struct i915_buddy_mm *mm) > i915_block_free(mm, mm->roots[i]); > } > > + GEM_WARN_ON(mm->avail != mm->size); > + > kfree(mm->roots); > kfree(mm->free_list); > kmem_cache_destroy(mm->slab_blocks); > @@ -235,6 +238,7 @@ void i915_buddy_free(struct i915_buddy_mm *mm, > struct i915_buddy_block *block) > { > GEM_BUG_ON(!i915_buddy_block_is_allocated(block)); > + mm->avail += i915_buddy_block_size(mm, block); > __i915_buddy_free(mm, block); > } > > @@ -288,6 +292,7 @@ i915_buddy_alloc(struct i915_buddy_mm *mm, unsigned int order) > } > > mark_allocated(block); > + mm->avail -= i915_buddy_block_size(mm, block); > kmemleak_update_trace(block); > return block; > > @@ -373,6 +378,7 @@ int i915_buddy_alloc_range(struct i915_buddy_mm *mm, > } > > mark_allocated(block); > + mm->avail -= i915_buddy_block_size(mm, block); > list_add_tail(&block->link, &allocated); > continue; > } > diff --git a/drivers/gpu/drm/i915/i915_buddy.h b/drivers/gpu/drm/i915/i915_buddy.h > index 37f8c42071d1..feb7c1bb6244 100644 > --- a/drivers/gpu/drm/i915/i915_buddy.h > +++ b/drivers/gpu/drm/i915/i915_buddy.h > @@ -70,6 +70,7 @@ struct i915_buddy_mm { > /* Must be at least PAGE_SIZE */ > u64 chunk_size; > u64 size; > + u64 avail; > }; > > static inline u64 > diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c > index cc745751ac53..4765f220469e 100644 > --- a/drivers/gpu/drm/i915/i915_debugfs.c > +++ b/drivers/gpu/drm/i915/i915_debugfs.c > @@ -246,8 +246,9 @@ static int i915_gem_object_info(struct seq_file *m, void *data) > atomic_read(&i915->mm.free_count), > i915->mm.shrink_memory); > for_each_memory_region(mr, i915, id) > - seq_printf(m, "%s: total:%pa, available:%pa bytes\n", > - mr->name, &mr->total, &mr->avail); > + seq_printf(m, "%s: total:%pa, available:%llu bytes\n", > + mr->name, &mr->total, > + intel_memory_region_get_avail(mr)); > > return 0; > } > diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c > index e49da36c62fb..f10dcea94ac9 100644 > --- a/drivers/gpu/drm/i915/i915_query.c > +++ b/drivers/gpu/drm/i915/i915_query.c > @@ -465,7 +465,7 @@ static int query_memregion_info(struct drm_i915_private *i915, > info.region.memory_class = mr->type; > info.region.memory_instance = mr->instance; > info.probed_size = mr->total; > - info.unallocated_size = mr->avail; > + info.unallocated_size = intel_memory_region_get_avail(mr); > > if (__copy_to_user(info_ptr, &info, sizeof(info))) > return -EFAULT; > diff --git a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c > index fc7ad5c035b8..562d11edc5e4 100644 > --- a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c > +++ b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c > @@ -246,3 +246,16 @@ int i915_ttm_buddy_man_reserve(struct ttm_resource_manager *man, > return ret; > } > > +/** > + * i915_ttm_buddy_man_avail - Get the currently available size > + * @man: The buddy allocator ttm manager > + * > + * Return: The available size in bytes > + */ > +u64 i915_ttm_buddy_man_get_avail(struct ttm_resource_manager *man) > +{ > + struct i915_ttm_buddy_manager *bman = to_buddy_manager(man); > + struct i915_buddy_mm *mm = &bman->mm; > + > + return mm->avail; > +} > diff --git a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.h b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.h > index 26026213e20a..39f5b1a4c3e7 100644 > --- a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.h > +++ b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.h > @@ -53,4 +53,6 @@ int i915_ttm_buddy_man_fini(struct ttm_device *bdev, > int i915_ttm_buddy_man_reserve(struct ttm_resource_manager *man, > u64 start, u64 size); > > +u64 i915_ttm_buddy_man_get_avail(struct ttm_resource_manager *man); > + > #endif > diff --git a/drivers/gpu/drm/i915/intel_memory_region.c b/drivers/gpu/drm/i915/intel_memory_region.c > index df59f884d37c..269cbb60e233 100644 > --- a/drivers/gpu/drm/i915/intel_memory_region.c > +++ b/drivers/gpu/drm/i915/intel_memory_region.c > @@ -132,6 +132,14 @@ void intel_memory_region_set_name(struct intel_memory_region *mem, > va_end(ap); > } > > +u64 intel_memory_region_get_avail(struct intel_memory_region *mr) > +{ > + if (mr->type == INTEL_MEMORY_LOCAL) > + return i915_ttm_buddy_man_get_avail(mr->region_private); > + > + return mr->avail; > +} Perhaps a kerneldoc comment here as well? > + > static void __intel_memory_region_destroy(struct kref *kref) > { > struct intel_memory_region *mem = > diff --git a/drivers/gpu/drm/i915/intel_memory_region.h b/drivers/gpu/drm/i915/intel_memory_region.h > index 2be8433d373a..6f7a073d5a70 100644 > --- a/drivers/gpu/drm/i915/intel_memory_region.h > +++ b/drivers/gpu/drm/i915/intel_memory_region.h > @@ -74,6 +74,7 @@ struct intel_memory_region { > resource_size_t io_start; > resource_size_t min_page_size; > resource_size_t total; > + /* Do not access directly. Use the accessor instead. */ > resource_size_t avail; > > u16 type; > @@ -125,4 +126,7 @@ intel_memory_region_set_name(struct intel_memory_region *mem, > int intel_memory_region_reserve(struct intel_memory_region *mem, > resource_size_t offset, > resource_size_t size); > + > +u64 intel_memory_region_get_avail(struct intel_memory_region *mem); > + > #endif Otherwise code itself looks good to me. Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
On 18/06/2021 14:44, Thomas Hellström wrote: > > On 6/18/21 3:31 PM, Matthew Auld wrote: >> Looks like it got lost along the way, so add it back. This is needed for >> the region query uAPI where we need to report an accurate available size >> for lmem. > > Hmm. How is this uAPI intended to work in a multi-client environment > where the returned value can be nothing but a snapshot of the current > state, that can't be relied upon? Ok, maybe I'm overselling it. s/accurate/current snapshot/. It does feel more useful than just returning -1 or so? Daniel, Jason, any thoughts? Or maybe mr->total is all that real userspace really cares about? > >> This time around let's push it directly into the allocator, which >> simplifies things, like not having to care about internal fragmentation, >> or having to remember to track things for all possible interfaces that >> might want to allocate or reserve pages. >> >> Signed-off-by: Matthew Auld <matthew.auld@intel.com> >> Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com> >> --- >> drivers/gpu/drm/i915/i915_buddy.c | 6 ++++++ >> drivers/gpu/drm/i915/i915_buddy.h | 1 + >> drivers/gpu/drm/i915/i915_debugfs.c | 5 +++-- >> drivers/gpu/drm/i915/i915_query.c | 2 +- >> drivers/gpu/drm/i915/i915_ttm_buddy_manager.c | 13 +++++++++++++ >> drivers/gpu/drm/i915/i915_ttm_buddy_manager.h | 2 ++ >> drivers/gpu/drm/i915/intel_memory_region.c | 8 ++++++++ >> drivers/gpu/drm/i915/intel_memory_region.h | 4 ++++ >> 8 files changed, 38 insertions(+), 3 deletions(-) >> >> diff --git a/drivers/gpu/drm/i915/i915_buddy.c >> b/drivers/gpu/drm/i915/i915_buddy.c >> index 29dd7d0310c1..27cd2487a18f 100644 >> --- a/drivers/gpu/drm/i915/i915_buddy.c >> +++ b/drivers/gpu/drm/i915/i915_buddy.c >> @@ -80,6 +80,7 @@ int i915_buddy_init(struct i915_buddy_mm *mm, u64 >> size, u64 chunk_size) >> size = round_down(size, chunk_size); >> mm->size = size; >> + mm->avail = size; >> mm->chunk_size = chunk_size; >> mm->max_order = ilog2(size) - ilog2(chunk_size); >> @@ -159,6 +160,8 @@ void i915_buddy_fini(struct i915_buddy_mm *mm) >> i915_block_free(mm, mm->roots[i]); >> } >> + GEM_WARN_ON(mm->avail != mm->size); >> + >> kfree(mm->roots); >> kfree(mm->free_list); >> kmem_cache_destroy(mm->slab_blocks); >> @@ -235,6 +238,7 @@ void i915_buddy_free(struct i915_buddy_mm *mm, >> struct i915_buddy_block *block) >> { >> GEM_BUG_ON(!i915_buddy_block_is_allocated(block)); >> + mm->avail += i915_buddy_block_size(mm, block); >> __i915_buddy_free(mm, block); >> } >> @@ -288,6 +292,7 @@ i915_buddy_alloc(struct i915_buddy_mm *mm, >> unsigned int order) >> } >> mark_allocated(block); >> + mm->avail -= i915_buddy_block_size(mm, block); >> kmemleak_update_trace(block); >> return block; >> @@ -373,6 +378,7 @@ int i915_buddy_alloc_range(struct i915_buddy_mm *mm, >> } >> mark_allocated(block); >> + mm->avail -= i915_buddy_block_size(mm, block); >> list_add_tail(&block->link, &allocated); >> continue; >> } >> diff --git a/drivers/gpu/drm/i915/i915_buddy.h >> b/drivers/gpu/drm/i915/i915_buddy.h >> index 37f8c42071d1..feb7c1bb6244 100644 >> --- a/drivers/gpu/drm/i915/i915_buddy.h >> +++ b/drivers/gpu/drm/i915/i915_buddy.h >> @@ -70,6 +70,7 @@ struct i915_buddy_mm { >> /* Must be at least PAGE_SIZE */ >> u64 chunk_size; >> u64 size; >> + u64 avail; >> }; >> static inline u64 >> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c >> b/drivers/gpu/drm/i915/i915_debugfs.c >> index cc745751ac53..4765f220469e 100644 >> --- a/drivers/gpu/drm/i915/i915_debugfs.c >> +++ b/drivers/gpu/drm/i915/i915_debugfs.c >> @@ -246,8 +246,9 @@ static int i915_gem_object_info(struct seq_file >> *m, void *data) >> atomic_read(&i915->mm.free_count), >> i915->mm.shrink_memory); >> for_each_memory_region(mr, i915, id) >> - seq_printf(m, "%s: total:%pa, available:%pa bytes\n", >> - mr->name, &mr->total, &mr->avail); >> + seq_printf(m, "%s: total:%pa, available:%llu bytes\n", >> + mr->name, &mr->total, >> + intel_memory_region_get_avail(mr)); >> return 0; >> } >> diff --git a/drivers/gpu/drm/i915/i915_query.c >> b/drivers/gpu/drm/i915/i915_query.c >> index e49da36c62fb..f10dcea94ac9 100644 >> --- a/drivers/gpu/drm/i915/i915_query.c >> +++ b/drivers/gpu/drm/i915/i915_query.c >> @@ -465,7 +465,7 @@ static int query_memregion_info(struct >> drm_i915_private *i915, >> info.region.memory_class = mr->type; >> info.region.memory_instance = mr->instance; >> info.probed_size = mr->total; >> - info.unallocated_size = mr->avail; >> + info.unallocated_size = intel_memory_region_get_avail(mr); >> if (__copy_to_user(info_ptr, &info, sizeof(info))) >> return -EFAULT; >> diff --git a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c >> b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c >> index fc7ad5c035b8..562d11edc5e4 100644 >> --- a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c >> +++ b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c >> @@ -246,3 +246,16 @@ int i915_ttm_buddy_man_reserve(struct >> ttm_resource_manager *man, >> return ret; >> } >> +/** >> + * i915_ttm_buddy_man_avail - Get the currently available size >> + * @man: The buddy allocator ttm manager >> + * >> + * Return: The available size in bytes >> + */ >> +u64 i915_ttm_buddy_man_get_avail(struct ttm_resource_manager *man) >> +{ >> + struct i915_ttm_buddy_manager *bman = to_buddy_manager(man); >> + struct i915_buddy_mm *mm = &bman->mm; >> + >> + return mm->avail; >> +} >> diff --git a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.h >> b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.h >> index 26026213e20a..39f5b1a4c3e7 100644 >> --- a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.h >> +++ b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.h >> @@ -53,4 +53,6 @@ int i915_ttm_buddy_man_fini(struct ttm_device *bdev, >> int i915_ttm_buddy_man_reserve(struct ttm_resource_manager *man, >> u64 start, u64 size); >> +u64 i915_ttm_buddy_man_get_avail(struct ttm_resource_manager *man); >> + >> #endif >> diff --git a/drivers/gpu/drm/i915/intel_memory_region.c >> b/drivers/gpu/drm/i915/intel_memory_region.c >> index df59f884d37c..269cbb60e233 100644 >> --- a/drivers/gpu/drm/i915/intel_memory_region.c >> +++ b/drivers/gpu/drm/i915/intel_memory_region.c >> @@ -132,6 +132,14 @@ void intel_memory_region_set_name(struct >> intel_memory_region *mem, >> va_end(ap); >> } >> +u64 intel_memory_region_get_avail(struct intel_memory_region *mr) >> +{ >> + if (mr->type == INTEL_MEMORY_LOCAL) >> + return i915_ttm_buddy_man_get_avail(mr->region_private); >> + >> + return mr->avail; >> +} > > Perhaps a kerneldoc comment here as well? > > >> + >> static void __intel_memory_region_destroy(struct kref *kref) >> { >> struct intel_memory_region *mem = >> diff --git a/drivers/gpu/drm/i915/intel_memory_region.h >> b/drivers/gpu/drm/i915/intel_memory_region.h >> index 2be8433d373a..6f7a073d5a70 100644 >> --- a/drivers/gpu/drm/i915/intel_memory_region.h >> +++ b/drivers/gpu/drm/i915/intel_memory_region.h >> @@ -74,6 +74,7 @@ struct intel_memory_region { >> resource_size_t io_start; >> resource_size_t min_page_size; >> resource_size_t total; >> + /* Do not access directly. Use the accessor instead. */ >> resource_size_t avail; >> u16 type; >> @@ -125,4 +126,7 @@ intel_memory_region_set_name(struct >> intel_memory_region *mem, >> int intel_memory_region_reserve(struct intel_memory_region *mem, >> resource_size_t offset, >> resource_size_t size); >> + >> +u64 intel_memory_region_get_avail(struct intel_memory_region *mem); >> + >> #endif > > Otherwise code itself looks good to me. > > Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> > > >
diff --git a/drivers/gpu/drm/i915/i915_buddy.c b/drivers/gpu/drm/i915/i915_buddy.c index 29dd7d0310c1..27cd2487a18f 100644 --- a/drivers/gpu/drm/i915/i915_buddy.c +++ b/drivers/gpu/drm/i915/i915_buddy.c @@ -80,6 +80,7 @@ int i915_buddy_init(struct i915_buddy_mm *mm, u64 size, u64 chunk_size) size = round_down(size, chunk_size); mm->size = size; + mm->avail = size; mm->chunk_size = chunk_size; mm->max_order = ilog2(size) - ilog2(chunk_size); @@ -159,6 +160,8 @@ void i915_buddy_fini(struct i915_buddy_mm *mm) i915_block_free(mm, mm->roots[i]); } + GEM_WARN_ON(mm->avail != mm->size); + kfree(mm->roots); kfree(mm->free_list); kmem_cache_destroy(mm->slab_blocks); @@ -235,6 +238,7 @@ void i915_buddy_free(struct i915_buddy_mm *mm, struct i915_buddy_block *block) { GEM_BUG_ON(!i915_buddy_block_is_allocated(block)); + mm->avail += i915_buddy_block_size(mm, block); __i915_buddy_free(mm, block); } @@ -288,6 +292,7 @@ i915_buddy_alloc(struct i915_buddy_mm *mm, unsigned int order) } mark_allocated(block); + mm->avail -= i915_buddy_block_size(mm, block); kmemleak_update_trace(block); return block; @@ -373,6 +378,7 @@ int i915_buddy_alloc_range(struct i915_buddy_mm *mm, } mark_allocated(block); + mm->avail -= i915_buddy_block_size(mm, block); list_add_tail(&block->link, &allocated); continue; } diff --git a/drivers/gpu/drm/i915/i915_buddy.h b/drivers/gpu/drm/i915/i915_buddy.h index 37f8c42071d1..feb7c1bb6244 100644 --- a/drivers/gpu/drm/i915/i915_buddy.h +++ b/drivers/gpu/drm/i915/i915_buddy.h @@ -70,6 +70,7 @@ struct i915_buddy_mm { /* Must be at least PAGE_SIZE */ u64 chunk_size; u64 size; + u64 avail; }; static inline u64 diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index cc745751ac53..4765f220469e 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -246,8 +246,9 @@ static int i915_gem_object_info(struct seq_file *m, void *data) atomic_read(&i915->mm.free_count), i915->mm.shrink_memory); for_each_memory_region(mr, i915, id) - seq_printf(m, "%s: total:%pa, available:%pa bytes\n", - mr->name, &mr->total, &mr->avail); + seq_printf(m, "%s: total:%pa, available:%llu bytes\n", + mr->name, &mr->total, + intel_memory_region_get_avail(mr)); return 0; } diff --git a/drivers/gpu/drm/i915/i915_query.c b/drivers/gpu/drm/i915/i915_query.c index e49da36c62fb..f10dcea94ac9 100644 --- a/drivers/gpu/drm/i915/i915_query.c +++ b/drivers/gpu/drm/i915/i915_query.c @@ -465,7 +465,7 @@ static int query_memregion_info(struct drm_i915_private *i915, info.region.memory_class = mr->type; info.region.memory_instance = mr->instance; info.probed_size = mr->total; - info.unallocated_size = mr->avail; + info.unallocated_size = intel_memory_region_get_avail(mr); if (__copy_to_user(info_ptr, &info, sizeof(info))) return -EFAULT; diff --git a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c index fc7ad5c035b8..562d11edc5e4 100644 --- a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c +++ b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.c @@ -246,3 +246,16 @@ int i915_ttm_buddy_man_reserve(struct ttm_resource_manager *man, return ret; } +/** + * i915_ttm_buddy_man_avail - Get the currently available size + * @man: The buddy allocator ttm manager + * + * Return: The available size in bytes + */ +u64 i915_ttm_buddy_man_get_avail(struct ttm_resource_manager *man) +{ + struct i915_ttm_buddy_manager *bman = to_buddy_manager(man); + struct i915_buddy_mm *mm = &bman->mm; + + return mm->avail; +} diff --git a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.h b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.h index 26026213e20a..39f5b1a4c3e7 100644 --- a/drivers/gpu/drm/i915/i915_ttm_buddy_manager.h +++ b/drivers/gpu/drm/i915/i915_ttm_buddy_manager.h @@ -53,4 +53,6 @@ int i915_ttm_buddy_man_fini(struct ttm_device *bdev, int i915_ttm_buddy_man_reserve(struct ttm_resource_manager *man, u64 start, u64 size); +u64 i915_ttm_buddy_man_get_avail(struct ttm_resource_manager *man); + #endif diff --git a/drivers/gpu/drm/i915/intel_memory_region.c b/drivers/gpu/drm/i915/intel_memory_region.c index df59f884d37c..269cbb60e233 100644 --- a/drivers/gpu/drm/i915/intel_memory_region.c +++ b/drivers/gpu/drm/i915/intel_memory_region.c @@ -132,6 +132,14 @@ void intel_memory_region_set_name(struct intel_memory_region *mem, va_end(ap); } +u64 intel_memory_region_get_avail(struct intel_memory_region *mr) +{ + if (mr->type == INTEL_MEMORY_LOCAL) + return i915_ttm_buddy_man_get_avail(mr->region_private); + + return mr->avail; +} + static void __intel_memory_region_destroy(struct kref *kref) { struct intel_memory_region *mem = diff --git a/drivers/gpu/drm/i915/intel_memory_region.h b/drivers/gpu/drm/i915/intel_memory_region.h index 2be8433d373a..6f7a073d5a70 100644 --- a/drivers/gpu/drm/i915/intel_memory_region.h +++ b/drivers/gpu/drm/i915/intel_memory_region.h @@ -74,6 +74,7 @@ struct intel_memory_region { resource_size_t io_start; resource_size_t min_page_size; resource_size_t total; + /* Do not access directly. Use the accessor instead. */ resource_size_t avail; u16 type; @@ -125,4 +126,7 @@ intel_memory_region_set_name(struct intel_memory_region *mem, int intel_memory_region_reserve(struct intel_memory_region *mem, resource_size_t offset, resource_size_t size); + +u64 intel_memory_region_get_avail(struct intel_memory_region *mem); + #endif
Looks like it got lost along the way, so add it back. This is needed for the region query uAPI where we need to report an accurate available size for lmem. This time around let's push it directly into the allocator, which simplifies things, like not having to care about internal fragmentation, or having to remember to track things for all possible interfaces that might want to allocate or reserve pages. Signed-off-by: Matthew Auld <matthew.auld@intel.com> Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com> --- drivers/gpu/drm/i915/i915_buddy.c | 6 ++++++ drivers/gpu/drm/i915/i915_buddy.h | 1 + drivers/gpu/drm/i915/i915_debugfs.c | 5 +++-- drivers/gpu/drm/i915/i915_query.c | 2 +- drivers/gpu/drm/i915/i915_ttm_buddy_manager.c | 13 +++++++++++++ drivers/gpu/drm/i915/i915_ttm_buddy_manager.h | 2 ++ drivers/gpu/drm/i915/intel_memory_region.c | 8 ++++++++ drivers/gpu/drm/i915/intel_memory_region.h | 4 ++++ 8 files changed, 38 insertions(+), 3 deletions(-)