[PATCH 04/11] drm/ttm: cleanup coding style and implementation.
daniel at ffwll.ch
daniel at ffwll.ch
Tue Jul 21 08:56:25 UTC 2020
On Tue, Jul 21, 2020 at 09:32:38AM +0200, Christian König wrote:
> Only functional change is to always keep io_reserved_count up to date
> for debugging even when it is not used otherwise.
Functional change in a cleanup patch. Tsk. It looks correct though ...
Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>
>
> Signed-off-by: Christian König <christian.koenig at amd.com>
> ---
> drivers/gpu/drm/ttm/ttm_bo_util.c | 97 +++++++++++++++----------------
> 1 file changed, 48 insertions(+), 49 deletions(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
> index 6c05f4fd15ae..7fb3e0bcbab4 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo_util.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
> @@ -115,39 +115,35 @@ static int ttm_mem_io_evict(struct ttm_mem_type_manager *man)
> {
> struct ttm_buffer_object *bo;
>
> - if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru))
> + bo = list_first_entry_or_null(&man->io_reserve_lru,
> + struct ttm_buffer_object,
> + io_reserve_lru);
> + if (!bo)
> return -ENOSPC;
>
> - bo = list_first_entry(&man->io_reserve_lru,
> - struct ttm_buffer_object,
> - io_reserve_lru);
> list_del_init(&bo->io_reserve_lru);
> ttm_bo_unmap_virtual_locked(bo);
> -
> return 0;
> }
>
> -
> int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
> struct ttm_mem_reg *mem)
> {
> struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
> - int ret = 0;
> + int ret;
> +
> + if (mem->bus.io_reserved_count++)
> + return 0;
>
> if (!bdev->driver->io_mem_reserve)
> return 0;
> - if (likely(!man->use_io_reserve_lru))
> - return bdev->driver->io_mem_reserve(bdev, mem);
>
> - if (bdev->driver->io_mem_reserve &&
> - mem->bus.io_reserved_count++ == 0) {
> retry:
> - ret = bdev->driver->io_mem_reserve(bdev, mem);
> - if (ret == -ENOSPC) {
> - ret = ttm_mem_io_evict(man);
> - if (ret == 0)
> - goto retry;
> - }
> + ret = bdev->driver->io_mem_reserve(bdev, mem);
> + if (ret == -ENOSPC) {
> + ret = ttm_mem_io_evict(man);
> + if (ret == 0)
> + goto retry;
> }
> return ret;
> }
> @@ -155,35 +151,31 @@ int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
> void ttm_mem_io_free(struct ttm_bo_device *bdev,
> struct ttm_mem_reg *mem)
> {
> - struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
> -
> - if (likely(!man->use_io_reserve_lru))
> + if (--mem->bus.io_reserved_count)
> return;
>
> - if (bdev->driver->io_mem_reserve &&
> - --mem->bus.io_reserved_count == 0 &&
> - bdev->driver->io_mem_free)
> - bdev->driver->io_mem_free(bdev, mem);
> + if (!bdev->driver->io_mem_free)
> + return;
>
> + bdev->driver->io_mem_free(bdev, mem);
> }
>
> int ttm_mem_io_reserve_vm(struct ttm_buffer_object *bo)
> {
> + struct ttm_mem_type_manager *man = &bo->bdev->man[bo->mem.mem_type];
> struct ttm_mem_reg *mem = &bo->mem;
> int ret;
>
> - if (!mem->bus.io_reserved_vm) {
> - struct ttm_mem_type_manager *man =
> - &bo->bdev->man[mem->mem_type];
> + if (mem->bus.io_reserved_vm)
> + return 0;
>
> - ret = ttm_mem_io_reserve(bo->bdev, mem);
> - if (unlikely(ret != 0))
> - return ret;
> - mem->bus.io_reserved_vm = true;
> - if (man->use_io_reserve_lru)
> - list_add_tail(&bo->io_reserve_lru,
> - &man->io_reserve_lru);
> - }
> + ret = ttm_mem_io_reserve(bo->bdev, mem);
> + if (unlikely(ret != 0))
> + return ret;
> + mem->bus.io_reserved_vm = true;
> + if (man->use_io_reserve_lru)
> + list_add_tail(&bo->io_reserve_lru,
> + &man->io_reserve_lru);
> return 0;
> }
>
> @@ -191,15 +183,17 @@ void ttm_mem_io_free_vm(struct ttm_buffer_object *bo)
> {
> struct ttm_mem_reg *mem = &bo->mem;
>
> - if (mem->bus.io_reserved_vm) {
> - mem->bus.io_reserved_vm = false;
> - list_del_init(&bo->io_reserve_lru);
> - ttm_mem_io_free(bo->bdev, mem);
> - }
> + if (!mem->bus.io_reserved_vm)
> + return;
> +
> + mem->bus.io_reserved_vm = false;
> + list_del_init(&bo->io_reserve_lru);
> + ttm_mem_io_free(bo->bdev, mem);
> }
>
> -static int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
> - void **virtual)
> +static int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev,
> + struct ttm_mem_reg *mem,
> + void **virtual)
> {
> struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
> int ret;
> @@ -216,9 +210,11 @@ static int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *m
> addr = mem->bus.addr;
> } else {
> if (mem->placement & TTM_PL_FLAG_WC)
> - addr = ioremap_wc(mem->bus.base + mem->bus.offset, mem->bus.size);
> + addr = ioremap_wc(mem->bus.base + mem->bus.offset,
> + mem->bus.size);
> else
> - addr = ioremap(mem->bus.base + mem->bus.offset, mem->bus.size);
> + addr = ioremap(mem->bus.base + mem->bus.offset,
> + mem->bus.size);
> if (!addr) {
> (void) ttm_mem_io_lock(man, false);
> ttm_mem_io_free(bdev, mem);
> @@ -230,8 +226,9 @@ static int ttm_mem_reg_ioremap(struct ttm_bo_device *bdev, struct ttm_mem_reg *m
> return 0;
> }
>
> -static void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem,
> - void *virtual)
> +static void ttm_mem_reg_iounmap(struct ttm_bo_device *bdev,
> + struct ttm_mem_reg *mem,
> + void *virtual)
> {
> struct ttm_mem_type_manager *man;
>
> @@ -513,11 +510,13 @@ static int ttm_bo_ioremap(struct ttm_buffer_object *bo,
> } else {
> map->bo_kmap_type = ttm_bo_map_iomap;
> if (mem->placement & TTM_PL_FLAG_WC)
> - map->virtual = ioremap_wc(bo->mem.bus.base + bo->mem.bus.offset + offset,
> + map->virtual = ioremap_wc(bo->mem.bus.base +
> + bo->mem.bus.offset + offset,
> size);
> else
> - map->virtual = ioremap(bo->mem.bus.base + bo->mem.bus.offset + offset,
> - size);
> + map->virtual = ioremap(bo->mem.bus.base +
> + bo->mem.bus.offset + offset,
> + size);
> }
> return (!map->virtual) ? -ENOMEM : 0;
> }
> --
> 2.17.1
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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