public inbox for intel-gfx@lists.freedesktop.org
 help / color / mirror / Atom feed
  • * [PATCH v2] ACPI/i915: Fix wrong <acpi/acpi.h> inclusion in i915 opregion module.
           [not found] <cover.1385094640.git.lv.zheng@intel.com>
           [not found] ` <cover.1386116927.git.lv.zheng@intel.com>
    @ 2013-12-05 14:25 ` Lv Zheng
           [not found] ` <cover.1386316208.git.lv.zheng@intel.com>
      2 siblings, 0 replies; 5+ messages in thread
    From: Lv Zheng @ 2013-12-05 14:25 UTC (permalink / raw)
      To: Rafael J. Wysocki, Len Brown
      Cc: Lv Zheng, Lv Zheng, linux-kernel, linux-acpi, Matthew Garrett,
    	Daniel Vetter, intel-gfx
    
    From: Lv Zheng <lv.zheng@intel.com>
    
    In Linux kernel, ACPICA is wrapped and safely exported by CONFIG_ACPI.  So
    all external modules should depend on CONFIG_ACPI rather than using ACPICA
    header directly for stubbing.  But if we moves <acpi/acpi.h> inclusions
    into "#ifdef CONFIG_ACPI", build breakge can help to detect wrong ACPICA
    dependent modules.
    
    One of the build breakage is:
    include/linux/acpi_io.h:7:45: error: unknown type name 'acpi_physical_address'
    include/linux/acpi_io.h:8:10: error: unknown type name 'acpi_size'
    include/linux/acpi_io.h:13:33: error: unknown type name 'acpi_physical_address'
    include/linux/acpi_io.h:15:40: warning: 'struct acpi_generic_address' declared inside parameter list [enabled by default]
    include/linux/acpi_io.h:15:40: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default]
    include/linux/acpi_io.h:16:43: warning: 'struct acpi_generic_address' declared inside parameter list [enabled by default]
    drivers/gpu/drm/i915/intel_opregion.c: In function 'intel_opregion_setup':
    drivers/gpu/drm/i915/intel_opregion.c:883:2: error: implicit declaration of function 'acpi_os_ioremap' [-Werror=implicit-function-declaration]
    drivers/gpu/drm/i915/intel_opregion.c:883:7: warning: assignment makes pointer from integer without a cast [enabled by default]
    
    The root causes of this breakage are:
    1. The <linux/acpi_io.h> depends on CONFIG_ACPI=y as most of the prototypes
       exported by it are implemented in drivers/acpi/osl.c.
    2. CONFIG_DRM_I915 uses the only "inline" function acpi_os_ioremap() to
       implement stubs but it shouldn't.
    
    Since ACPI IGD OpRegion is an ACPI-based mechanism, (please refer to the
    Doclink below), this patch fixes this issue by making
    drivers/gpu/drm/i915/intel_opregion.c dependent on CONFIG_ACPI.  This is
    identical to other Intel DRM drivers' OpRegion support (e.x.,
    drivers/gpu/drm/gma500/opregion.c).
    
    Since acpi_io.h is not safe for CONFIG_ACPI=y environment, this patch also
    moves it to include/acpi, includes it in <linux/acpi.h> for CONFIG_ACPI=y
    build environment and cleans up its inclusions by converting them into
    <linux/acpi.h> inclusions.
    
    After that, since all <acpi/acpi_io.h> inclusions are CONFIG_ACPI
    dependent, the FIXME marked <acpi/acpi.h> inclusion in <acpi/acpi_io.h> is
    also deleted in this patch.
    
    Doclink: https://01.org/linuxgraphics/sites/default/files/documentation/acpi_igd_opregion_spec.pdf
    Cc: Matthew Garrett <mjg59@srcf.ucam.org>
    Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
    Cc: intel-gfx@lists.freedesktop.org
    Signed-off-by: Lv Zheng <lv.zheng@intel.com>
    ---
     Updated due to:
     1. Patch descripition is changed, "FIXME deletion" notes is added;
     2. A mistake is fixed in the original patch.  The change in the
        drivers/gpu/drm/i915/intel_opregion.c is not added to the quilt.  It's
        lost as a process issues in my tests.
        This update fixes this issue by deleting linux/acpi_io.h inclusion from
        drivers/gpu/drm/i915/intel_opregion.c.
        Recursive build test environment is set up as follows:
        Following CONFIGs are enabled by default:
         CONFIG_DRM_I915=y
         CONFIG_DRM_GMA500=y
         CONFIG_ACPI_APEI=y
         CONFIG_ACPI_APEI_GHES=y
         CONFIG_ACPI_APEI_EINJ=y
         CONFIG_ACPI_APEI_ERST_DEBUG=y
        Following special CONFIG tests are enabled:
         CONFIG_ACPI=n
        Following special object tests are enabled:
         drivers/acpi/apei/erst.o
         drivers/acpi/apei/hest.o
         drivers/acpi/apei/ghes.o
         drivers/acpi/apei/einj.o
         drivers/acpi/apei/erst-dbg.o
         drivers/gpu/drm/i915/intel_opregion.o
         drivers/gpu/drm/gma500/opregion.o
        It is done after merging the patch and before signing-off the patch.
    ---
     drivers/acpi/apei/apei-base.c         |    1 -
     drivers/acpi/apei/apei-internal.h     |    1 -
     drivers/acpi/apei/ghes.c              |    1 -
     drivers/acpi/nvs.c                    |    1 -
     drivers/acpi/osl.c                    |    1 -
     drivers/gpu/drm/gma500/opregion.c     |    1 -
     drivers/gpu/drm/i915/Makefile         |    3 +--
     drivers/gpu/drm/i915/i915_drv.h       |    3 ++-
     drivers/gpu/drm/i915/intel_opregion.c |    1 -
     include/acpi/acpi_io.h                |   17 +++++++++++++++++
     include/linux/acpi.h                  |    1 +
     include/linux/acpi_io.h               |   18 ------------------
     12 files changed, 21 insertions(+), 28 deletions(-)
     create mode 100644 include/acpi/acpi_io.h
     delete mode 100644 include/linux/acpi_io.h
    
    diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c
    index 6d2c49b..0760b75 100644
    --- a/drivers/acpi/apei/apei-base.c
    +++ b/drivers/acpi/apei/apei-base.c
    @@ -34,7 +34,6 @@
     #include <linux/module.h>
     #include <linux/init.h>
     #include <linux/acpi.h>
    -#include <linux/acpi_io.h>
     #include <linux/slab.h>
     #include <linux/io.h>
     #include <linux/kref.h>
    diff --git a/drivers/acpi/apei/apei-internal.h b/drivers/acpi/apei/apei-internal.h
    index 21ba34a..e5bcd91 100644
    --- a/drivers/acpi/apei/apei-internal.h
    +++ b/drivers/acpi/apei/apei-internal.h
    @@ -8,7 +8,6 @@
     
     #include <linux/cper.h>
     #include <linux/acpi.h>
    -#include <linux/acpi_io.h>
     
     struct apei_exec_context;
     
    diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
    index a30bc31..694c486 100644
    --- a/drivers/acpi/apei/ghes.c
    +++ b/drivers/acpi/apei/ghes.c
    @@ -33,7 +33,6 @@
     #include <linux/module.h>
     #include <linux/init.h>
     #include <linux/acpi.h>
    -#include <linux/acpi_io.h>
     #include <linux/io.h>
     #include <linux/interrupt.h>
     #include <linux/timer.h>
    diff --git a/drivers/acpi/nvs.c b/drivers/acpi/nvs.c
    index 386a9fe..ef28613 100644
    --- a/drivers/acpi/nvs.c
    +++ b/drivers/acpi/nvs.c
    @@ -12,7 +12,6 @@
     #include <linux/mm.h>
     #include <linux/slab.h>
     #include <linux/acpi.h>
    -#include <linux/acpi_io.h>
     
     /* ACPI NVS regions, APEI may use it */
     
    diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
    index 7e2d814..63251b6 100644
    --- a/drivers/acpi/osl.c
    +++ b/drivers/acpi/osl.c
    @@ -39,7 +39,6 @@
     #include <linux/workqueue.h>
     #include <linux/nmi.h>
     #include <linux/acpi.h>
    -#include <linux/acpi_io.h>
     #include <linux/efi.h>
     #include <linux/ioport.h>
     #include <linux/list.h>
    diff --git a/drivers/gpu/drm/gma500/opregion.c b/drivers/gpu/drm/gma500/opregion.c
    index ad0d6de..13ec628 100644
    --- a/drivers/gpu/drm/gma500/opregion.c
    +++ b/drivers/gpu/drm/gma500/opregion.c
    @@ -22,7 +22,6 @@
      *
      */
     #include <linux/acpi.h>
    -#include <linux/acpi_io.h>
     #include "psb_drv.h"
     #include "psb_intel_reg.h"
     
    diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
    index 41838ea..d4ae48b 100644
    --- a/drivers/gpu/drm/i915/Makefile
    +++ b/drivers/gpu/drm/i915/Makefile
    @@ -38,7 +38,6 @@ i915-y := i915_drv.o i915_dma.o i915_irq.o \
     	  intel_ringbuffer.o \
     	  intel_overlay.o \
     	  intel_sprite.o \
    -	  intel_opregion.o \
     	  intel_sideband.o \
     	  intel_uncore.o \
     	  dvo_ch7xxx.o \
    @@ -51,7 +50,7 @@ i915-y := i915_drv.o i915_dma.o i915_irq.o \
     
     i915-$(CONFIG_COMPAT)   += i915_ioc32.o
     
    -i915-$(CONFIG_ACPI)	+= intel_acpi.o
    +i915-$(CONFIG_ACPI)	+= intel_acpi.o intel_opregion.o
     
     i915-$(CONFIG_DRM_I915_FBDEV) += intel_fbdev.o
     
    diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
    index ccdbecc..7f37b83 100644
    --- a/drivers/gpu/drm/i915/i915_drv.h
    +++ b/drivers/gpu/drm/i915/i915_drv.h
    @@ -2336,8 +2336,8 @@ extern void intel_i2c_reset(struct drm_device *dev);
     
     /* intel_opregion.c */
     struct intel_encoder;
    -extern int intel_opregion_setup(struct drm_device *dev);
     #ifdef CONFIG_ACPI
    +extern int intel_opregion_setup(struct drm_device *dev);
     extern void intel_opregion_init(struct drm_device *dev);
     extern void intel_opregion_fini(struct drm_device *dev);
     extern void intel_opregion_asle_intr(struct drm_device *dev);
    @@ -2346,6 +2346,7 @@ extern int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
     extern int intel_opregion_notify_adapter(struct drm_device *dev,
     					 pci_power_t state);
     #else
    +static inline int intel_opregion_setup(struct drm_device *dev) { return 0; }
     static inline void intel_opregion_init(struct drm_device *dev) { return; }
     static inline void intel_opregion_fini(struct drm_device *dev) { return; }
     static inline void intel_opregion_asle_intr(struct drm_device *dev) { return; }
    diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
    index 6d69a9b..9a8804b 100644
    --- a/drivers/gpu/drm/i915/intel_opregion.c
    +++ b/drivers/gpu/drm/i915/intel_opregion.c
    @@ -28,7 +28,6 @@
     #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
     
     #include <linux/acpi.h>
    -#include <linux/acpi_io.h>
     #include <acpi/video.h>
     
     #include <drm/drmP.h>
    diff --git a/include/acpi/acpi_io.h b/include/acpi/acpi_io.h
    new file mode 100644
    index 0000000..2be8580
    --- /dev/null
    +++ b/include/acpi/acpi_io.h
    @@ -0,0 +1,17 @@
    +#ifndef _ACPI_IO_H_
    +#define _ACPI_IO_H_
    +
    +#include <linux/io.h>
    +
    +static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
    +					    acpi_size size)
    +{
    +       return ioremap_cache(phys, size);
    +}
    +
    +void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size);
    +
    +int acpi_os_map_generic_address(struct acpi_generic_address *addr);
    +void acpi_os_unmap_generic_address(struct acpi_generic_address *addr);
    +
    +#endif
    diff --git a/include/linux/acpi.h b/include/linux/acpi.h
    index 115c610..72c88f4 100644
    --- a/include/linux/acpi.h
    +++ b/include/linux/acpi.h
    @@ -42,6 +42,7 @@
     #include <acpi/acpi_bus.h>
     #include <acpi/acpi_drivers.h>
     #include <acpi/acpi_numa.h>
    +#include <acpi/acpi_io.h>
     #include <asm/acpi.h>
     
     static inline acpi_handle acpi_device_handle(struct acpi_device *adev)
    diff --git a/include/linux/acpi_io.h b/include/linux/acpi_io.h
    deleted file mode 100644
    index 2a5a139..0000000
    --- a/include/linux/acpi_io.h
    +++ /dev/null
    @@ -1,18 +0,0 @@
    -#ifndef _ACPI_IO_H_
    -#define _ACPI_IO_H_
    -
    -#include <linux/io.h>
    -#include <acpi/acpi.h>	/* FIXME: inclusion should be removed */
    -
    -static inline void __iomem *acpi_os_ioremap(acpi_physical_address phys,
    -					    acpi_size size)
    -{
    -       return ioremap_cache(phys, size);
    -}
    -
    -void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size);
    -
    -int acpi_os_map_generic_address(struct acpi_generic_address *addr);
    -void acpi_os_unmap_generic_address(struct acpi_generic_address *addr);
    -
    -#endif
    -- 
    1.7.10
    
    
    ^ permalink raw reply related	[flat|nested] 5+ messages in thread
  • [parent not found: <cover.1386316208.git.lv.zheng@intel.com>]

  • end of thread, other threads:[~2013-12-06  8:52 UTC | newest]
    
    Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
    -- links below jump to the message on this page --
         [not found] <cover.1385094640.git.lv.zheng@intel.com>
         [not found] ` <cover.1386116927.git.lv.zheng@intel.com>
    2013-12-04  0:38   ` [PATCH 1/3] ACPI/i915: Fix wrong <acpi/acpi.h> inclusion in i915 opregion module Lv Zheng
    2013-12-04  8:16     ` [Intel-gfx] " Daniel Vetter
    2013-12-05 13:04     ` Jani Nikula
    2013-12-05 14:25 ` [PATCH v2] " Lv Zheng
         [not found] ` <cover.1386316208.git.lv.zheng@intel.com>
    2013-12-06  8:52   ` [PATCH v3 4/6] " Lv Zheng
    

    This is a public inbox, see mirroring instructions
    for how to clone and mirror all data and code used for this inbox