Make use of the new drm_gem_huge_mnt_create() and drm_gem_has_huge_mnt() helpers to avoid code duplication. Now that it's just a few lines long, the single function in i915_gemfs.c is moved into v3d_gem_shmem.c.
v3: - use huge tmpfs mountpoint in drm_device - move i915_gemfs.c into i915_gem_shmem.c v4: - clean up mountpoint creation error handling v5: - use drm_gem_has_huge_mnt() helper v7: - include <drm/drm_print.h> in i915_gem_shmem.c v8: - keep logging notice message with CONFIG_TRANSPARENT_HUGEPAGE=n - don't access huge_mnt field with CONFIG_TRANSPARENT_HUGEPAGE=n Signed-off-by: Loïc Molinari <[email protected]> --- drivers/gpu/drm/i915/Makefile | 3 +- drivers/gpu/drm/i915/gem/i915_gem_shmem.c | 51 +++++++++---- drivers/gpu/drm/i915/gem/i915_gemfs.c | 71 ------------------- drivers/gpu/drm/i915/gem/i915_gemfs.h | 14 ---- .../gpu/drm/i915/gem/selftests/huge_pages.c | 17 +++-- drivers/gpu/drm/i915/i915_drv.h | 5 -- 6 files changed, 51 insertions(+), 110 deletions(-) delete mode 100644 drivers/gpu/drm/i915/gem/i915_gemfs.c delete mode 100644 drivers/gpu/drm/i915/gem/i915_gemfs.h diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index 84ec79b64960..b5a8c0a6b747 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -169,8 +169,7 @@ gem-y += \ gem/i915_gem_ttm_move.o \ gem/i915_gem_ttm_pm.o \ gem/i915_gem_userptr.o \ - gem/i915_gem_wait.o \ - gem/i915_gemfs.o + gem/i915_gem_wait.o i915-y += \ $(gem-y) \ i915_active.o \ diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c index 26dda55a07ff..e6621b568974 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c @@ -9,14 +9,16 @@ #include <linux/uio.h> #include <drm/drm_cache.h> +#include <drm/drm_gem.h> +#include <drm/drm_print.h> #include "gem/i915_gem_region.h" #include "i915_drv.h" #include "i915_gem_object.h" #include "i915_gem_tiling.h" -#include "i915_gemfs.h" #include "i915_scatterlist.h" #include "i915_trace.h" +#include "i915_utils.h" /* * Move folios to appropriate lru and release the batch, decrementing the @@ -515,11 +517,15 @@ static int __create_shmem(struct drm_i915_private *i915, if (BITS_PER_LONG == 64 && size > MAX_LFS_FILESIZE) return -E2BIG; - if (i915->mm.gemfs) - filp = shmem_file_setup_with_mnt(i915->mm.gemfs, "i915", size, - flags); +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + if (drm_gem_has_huge_mnt(&i915->drm)) + filp = shmem_file_setup_with_mnt(i915->drm.huge_mnt, "i915", + size, flags); else filp = shmem_file_setup("i915", size, flags); +#else + filp = shmem_file_setup("i915", size, flags); +#endif if (IS_ERR(filp)) return PTR_ERR(filp); @@ -644,21 +650,40 @@ i915_gem_object_create_shmem_from_data(struct drm_i915_private *i915, static int init_shmem(struct intel_memory_region *mem) { - i915_gemfs_init(mem->i915); - intel_memory_region_set_name(mem, "system"); + struct drm_i915_private *i915 = mem->i915; - return 0; /* We have fallback to the kernel mnt if gemfs init failed. */ -} + /* + * By creating our own shmemfs mountpoint, we can pass in + * mount flags that better match our usecase. + * + * One example, although it is probably better with a per-file + * control, is selecting huge page allocations ("huge=within_size"). + * However, we only do so on platforms which benefit from it, or to + * offset the overhead of iommu lookups, where with latter it is a net + * win even on platforms which would otherwise see some performance + * regressions such a slow reads issue on Broadwell and Skylake. + */ -static int release_shmem(struct intel_memory_region *mem) -{ - i915_gemfs_fini(mem->i915); - return 0; + if (GRAPHICS_VER(i915) < 11 && !i915_vtd_active(i915)) + goto no_thp; + + drm_gem_huge_mnt_create(&i915->drm, "within_size"); + if (drm_gem_has_huge_mnt(&i915->drm)) + drm_info(&i915->drm, "Using Transparent Hugepages\n"); + else + drm_notice(&i915->drm, + "Transparent Hugepage support is recommended for optimal performance%s\n", + GRAPHICS_VER(i915) >= 11 ? " on this platform!" : + " when IOMMU is enabled!"); + + no_thp: + intel_memory_region_set_name(mem, "system"); + + return 0; /* We have fallback to the kernel mnt if huge mnt failed. */ } static const struct intel_memory_region_ops shmem_region_ops = { .init = init_shmem, - .release = release_shmem, .init_object = shmem_object_init, }; diff --git a/drivers/gpu/drm/i915/gem/i915_gemfs.c b/drivers/gpu/drm/i915/gem/i915_gemfs.c deleted file mode 100644 index 1f1290214031..000000000000 --- a/drivers/gpu/drm/i915/gem/i915_gemfs.c +++ /dev/null @@ -1,71 +0,0 @@ -// SPDX-License-Identifier: MIT -/* - * Copyright © 2017 Intel Corporation - */ - -#include <linux/fs.h> -#include <linux/mount.h> -#include <linux/fs_context.h> - -#include <drm/drm_print.h> - -#include "i915_drv.h" -#include "i915_gemfs.h" -#include "i915_utils.h" - -void i915_gemfs_init(struct drm_i915_private *i915) -{ - struct file_system_type *type; - struct fs_context *fc; - struct vfsmount *gemfs; - int ret; - - /* - * By creating our own shmemfs mountpoint, we can pass in - * mount flags that better match our usecase. - * - * One example, although it is probably better with a per-file - * control, is selecting huge page allocations ("huge=within_size"). - * However, we only do so on platforms which benefit from it, or to - * offset the overhead of iommu lookups, where with latter it is a net - * win even on platforms which would otherwise see some performance - * regressions such a slow reads issue on Broadwell and Skylake. - */ - - if (GRAPHICS_VER(i915) < 11 && !i915_vtd_active(i915)) - return; - - if (!IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) - goto err; - - type = get_fs_type("tmpfs"); - if (!type) - goto err; - - fc = fs_context_for_mount(type, SB_KERNMOUNT); - if (IS_ERR(fc)) - goto err; - ret = vfs_parse_fs_string(fc, "source", "tmpfs"); - if (!ret) - ret = vfs_parse_fs_string(fc, "huge", "within_size"); - if (!ret) - gemfs = fc_mount_longterm(fc); - put_fs_context(fc); - if (ret) - goto err; - - i915->mm.gemfs = gemfs; - drm_info(&i915->drm, "Using Transparent Hugepages\n"); - return; - -err: - drm_notice(&i915->drm, - "Transparent Hugepage support is recommended for optimal performance%s\n", - GRAPHICS_VER(i915) >= 11 ? " on this platform!" : - " when IOMMU is enabled!"); -} - -void i915_gemfs_fini(struct drm_i915_private *i915) -{ - kern_unmount(i915->mm.gemfs); -} diff --git a/drivers/gpu/drm/i915/gem/i915_gemfs.h b/drivers/gpu/drm/i915/gem/i915_gemfs.h deleted file mode 100644 index 16d4333c9a4e..000000000000 --- a/drivers/gpu/drm/i915/gem/i915_gemfs.h +++ /dev/null @@ -1,14 +0,0 @@ -/* SPDX-License-Identifier: MIT */ -/* - * Copyright © 2017 Intel Corporation - */ - -#ifndef __I915_GEMFS_H__ -#define __I915_GEMFS_H__ - -struct drm_i915_private; - -void i915_gemfs_init(struct drm_i915_private *i915); -void i915_gemfs_fini(struct drm_i915_private *i915); - -#endif diff --git a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c index bd08605a1611..15e18e3010f0 100644 --- a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c +++ b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c @@ -1316,7 +1316,7 @@ typedef struct drm_i915_gem_object * static inline bool igt_can_allocate_thp(struct drm_i915_private *i915) { - return i915->mm.gemfs && has_transparent_hugepage(); + return drm_gem_has_huge_mnt(&i915->drm); } static struct drm_i915_gem_object * @@ -1761,7 +1761,10 @@ static int igt_tmpfs_fallback(void *arg) struct drm_i915_private *i915 = arg; struct i915_address_space *vm; struct i915_gem_context *ctx; - struct vfsmount *gemfs = i915->mm.gemfs; +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + struct vfsmount *huge_mnt = + drm_gem_has_huge_mnt(&i915->drm) ? i915->drm.huge_mnt : NULL; +#endif struct drm_i915_gem_object *obj; struct i915_vma *vma; struct file *file; @@ -1782,10 +1785,12 @@ static int igt_tmpfs_fallback(void *arg) /* * Make sure that we don't burst into a ball of flames upon falling back * to tmpfs, which we rely on if on the off-chance we encounter a failure - * when setting up gemfs. + * when setting up a huge mountpoint. */ - i915->mm.gemfs = NULL; +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + i915->drm.huge_mnt = NULL; +#endif obj = i915_gem_object_create_shmem(i915, PAGE_SIZE); if (IS_ERR(obj)) { @@ -1819,7 +1824,9 @@ static int igt_tmpfs_fallback(void *arg) out_put: i915_gem_object_put(obj); out_restore: - i915->mm.gemfs = gemfs; +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + i915->drm.huge_mnt = huge_mnt; +#endif i915_vm_put(vm); out: diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 95f9ddf22ce4..93a5af3de334 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -141,11 +141,6 @@ struct i915_gem_mm { */ atomic_t free_count; - /** - * tmpfs instance used for shmem backed objects - */ - struct vfsmount *gemfs; - struct intel_memory_region *regions[INTEL_REGION_UNKNOWN]; struct notifier_block oom_notifier; -- 2.47.3
