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authorTvrtko Ursulin <tvrtko.ursulin@intel.com>2022-04-29 13:04:14 +0300
committerTvrtko Ursulin <tvrtko.ursulin@intel.com>2022-05-09 16:03:50 +0300
commitb499914eb83765a27e3b43f216e9d1bdf4265418 (patch)
tree9593f269289514caf58e875c2cd917858c0bfb4a
parent23dd74db02d75579d8d4eb0b88c7ad119e782269 (diff)
downloadlinux-b499914eb83765a27e3b43f216e9d1bdf4265418.tar.xz
drm/i915: Only setup private tmpfs mount when needed and fix logging
If i915 does not want to use huge pages there is a) no point in setting up the private mount and b) should former fail, it is misleading to log THP support is disabled in the caller, which does not even know if callee tried to enable it. Fix both by restructuring the flow in i915_gemfs_init and at the same time note the failure to set it up in all cases. Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Matthew Auld <matthew.auld@intel.com> Cc: Eero Tamminen <eero.t.tamminen@intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220429100414.647857-2-tvrtko.ursulin@linux.intel.com
-rw-r--r--drivers/gpu/drm/i915/gem/i915_gem_shmem.c11
-rw-r--r--drivers/gpu/drm/i915/gem/i915_gemfs.c45
-rw-r--r--drivers/gpu/drm/i915/gem/i915_gemfs.h3
3 files changed, 23 insertions, 36 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
index c2a3e388fcb4..955844f19193 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
@@ -671,17 +671,10 @@ fail:
static int init_shmem(struct intel_memory_region *mem)
{
- int err;
-
- err = i915_gemfs_init(mem->i915);
- if (err) {
- DRM_NOTE("Unable to create a private tmpfs mount, hugepage support will be disabled(%d).\n",
- err);
- }
-
+ i915_gemfs_init(mem->i915);
intel_memory_region_set_name(mem, "system");
- return 0; /* Don't error, we can simply fallback to the kernel mnt */
+ return 0; /* We have fallback to the kernel mnt if gemfs init failed. */
}
static int release_shmem(struct intel_memory_region *mem)
diff --git a/drivers/gpu/drm/i915/gem/i915_gemfs.c b/drivers/gpu/drm/i915/gem/i915_gemfs.c
index c5a6bbc842fc..46b9a17d6abc 100644
--- a/drivers/gpu/drm/i915/gem/i915_gemfs.c
+++ b/drivers/gpu/drm/i915/gem/i915_gemfs.c
@@ -11,16 +11,11 @@
#include "i915_gemfs.h"
#include "i915_utils.h"
-int i915_gemfs_init(struct drm_i915_private *i915)
+void i915_gemfs_init(struct drm_i915_private *i915)
{
char huge_opt[] = "huge=within_size"; /* r/w */
struct file_system_type *type;
struct vfsmount *gemfs;
- char *opts;
-
- type = get_fs_type("tmpfs");
- if (!type)
- return -ENODEV;
/*
* By creating our own shmemfs mountpoint, we can pass in
@@ -34,29 +29,29 @@ int i915_gemfs_init(struct drm_i915_private *i915)
* regressions such a slow reads issue on Broadwell and Skylake.
*/
- opts = NULL;
- if (GRAPHICS_VER(i915) >= 11 || i915_vtd_active(i915)) {
- if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) {
- opts = huge_opt;
- drm_info(&i915->drm,
- "Transparent Hugepage mode '%s'\n",
- opts);
- } 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!");
- }
- }
+ if (GRAPHICS_VER(i915) < 11 && !i915_vtd_active(i915))
+ return;
+
+ if (!IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE))
+ goto err;
- gemfs = vfs_kern_mount(type, SB_KERNMOUNT, type->name, opts);
+ type = get_fs_type("tmpfs");
+ if (!type)
+ goto err;
+
+ gemfs = vfs_kern_mount(type, SB_KERNMOUNT, type->name, huge_opt);
if (IS_ERR(gemfs))
- return PTR_ERR(gemfs);
+ goto err;
i915->mm.gemfs = gemfs;
-
- return 0;
+ 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)
diff --git a/drivers/gpu/drm/i915/gem/i915_gemfs.h b/drivers/gpu/drm/i915/gem/i915_gemfs.h
index 2a1e59af3e4a..5d835e44c4f6 100644
--- a/drivers/gpu/drm/i915/gem/i915_gemfs.h
+++ b/drivers/gpu/drm/i915/gem/i915_gemfs.h
@@ -9,8 +9,7 @@
struct drm_i915_private;
-int i915_gemfs_init(struct drm_i915_private *i915);
-
+void i915_gemfs_init(struct drm_i915_private *i915);
void i915_gemfs_fini(struct drm_i915_private *i915);
#endif