linux-kernel - [PATCH 4/5] drm/i915/gem: export i915_gem_object_map

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241129162232.7594-5-jfalempe@redhat.com>
Date: Fri, 29 Nov 2024 17:20:29 +0100
From: Jocelyn Falempe <jfalempe@...hat.com>
To: Jani Nikula <jani.nikula@...ux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
	Tvrtko Ursulin <tursulin@...ulin.net>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	intel-gfx@...ts.freedesktop.org,
	intel-xe@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Cc: Jocelyn Falempe <jfalempe@...hat.com>
Subject: [PATCH 4/5] drm/i915/gem: export i915_gem_object_map_page/pfn

Prepare the work for drm_panic support. They are used to map the
current framebuffer, so the CPU can access it, and draws the panic
screen.

Signed-off-by: Jocelyn Falempe <jfalempe@...hat.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_object.h | 5 +++++
 drivers/gpu/drm/i915/gem/i915_gem_pages.c  | 4 ++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h
index 3dc61cbd2e11f..3f99d021f9221 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h
@@ -694,6 +694,11 @@ i915_gem_object_unpin_pages(struct drm_i915_gem_object *obj)
 int __i915_gem_object_put_pages(struct drm_i915_gem_object *obj);
 int i915_gem_object_truncate(struct drm_i915_gem_object *obj);
 
+void *i915_gem_object_map_page(struct drm_i915_gem_object *obj,
+				      enum i915_map_type type);
+void *i915_gem_object_map_pfn(struct drm_i915_gem_object *obj,
+				     enum i915_map_type type);
+
 /**
  * i915_gem_object_pin_map - return a contiguous mapping of the entire object
  * @obj: the object to map into kernel address space
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pages.c b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
index 8780aa2431053..76c023d2fbb1f 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_pages.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
@@ -268,7 +268,7 @@ int __i915_gem_object_put_pages(struct drm_i915_gem_object *obj)
 }
 
 /* The 'mapping' part of i915_gem_object_pin_map() below */
-static void *i915_gem_object_map_page(struct drm_i915_gem_object *obj,
+void *i915_gem_object_map_page(struct drm_i915_gem_object *obj,
 				      enum i915_map_type type)
 {
 	unsigned long n_pages = obj->base.size >> PAGE_SHIFT, i;
@@ -325,7 +325,7 @@ static void *i915_gem_object_map_page(struct drm_i915_gem_object *obj,
 	return vaddr ?: ERR_PTR(-ENOMEM);
 }
 
-static void *i915_gem_object_map_pfn(struct drm_i915_gem_object *obj,
+void *i915_gem_object_map_pfn(struct drm_i915_gem_object *obj,
 				     enum i915_map_type type)
 {
 	resource_size_t iomap = obj->mm.region->iomap.base -
-- 
2.47.0