The goal has been to just make device info a pointer to static const data, i.e. the static const structs in i915_pci.c. See [1]. However, there were issues with intel_device_info_runtime_init() clearing the display sub-struct of device info on the !HAS_DISPLAY() path, which consequently disables a lot of display functionality, like it should. Looks like we'd have to cover all those paths, and maybe sprinkle HAS_DISPLAY() checks in them, which we haven't gotten around to. In the mean time, hide mkwrite_device_info() better within intel_device_info.c by adding a intel_device_info_driver_create() for the very early initialization of the device info and initial runtime info. This also lets us declutter i915_drv.h a bit, and stops promoting mkwrite_device_info() as something that could be used. [1] https://lore.kernel.org/r/a0422f0a8ac055f65b7922bcd3119b180a41e79e.1655712106.git.jani.nikula@xxxxxxxxx Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> --- drivers/gpu/drm/i915/i915_driver.c | 12 ++-------- drivers/gpu/drm/i915/i915_drv.h | 7 ------ drivers/gpu/drm/i915/intel_device_info.c | 29 ++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_device_info.h | 2 ++ 4 files changed, 33 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c index 93fdc40d724f..2980ccdef6cd 100644 --- a/drivers/gpu/drm/i915/i915_driver.c +++ b/drivers/gpu/drm/i915/i915_driver.c @@ -720,8 +720,6 @@ i915_driver_create(struct pci_dev *pdev, const struct pci_device_id *ent) { const struct intel_device_info *match_info = (struct intel_device_info *)ent->driver_data; - struct intel_device_info *device_info; - struct intel_runtime_info *runtime; struct drm_i915_private *i915; i915 = devm_drm_dev_alloc(&pdev->dev, &i915_drm_driver, @@ -734,14 +732,8 @@ i915_driver_create(struct pci_dev *pdev, const struct pci_device_id *ent) /* Device parameters start as a copy of module parameters. */ i915_params_copy(&i915->params, &i915_modparams); - /* Setup the write-once "constant" device info */ - device_info = mkwrite_device_info(i915); - memcpy(device_info, match_info, sizeof(*device_info)); - - /* Initialize initial runtime info from static const data and pdev. */ - runtime = RUNTIME_INFO(i915); - memcpy(runtime, &INTEL_INFO(i915)->__runtime, sizeof(*runtime)); - runtime->device_id = pdev->device; + /* Set up device info and initial runtime info. */ + intel_device_info_driver_create(i915, pdev->device, match_info); return i915; } diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index e771fdc3099c..fe7eeafe9cff 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -931,11 +931,4 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915, #define HAS_LMEMBAR_SMEM_STOLEN(i915) (!HAS_LMEM(i915) && \ GRAPHICS_VER_FULL(i915) >= IP_VER(12, 70)) -/* intel_device_info.c */ -static inline struct intel_device_info * -mkwrite_device_info(struct drm_i915_private *dev_priv) -{ - return (struct intel_device_info *)INTEL_INFO(dev_priv); -} - #endif diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c index fc5cd14adfcc..4e23be2995bf 100644 --- a/drivers/gpu/drm/i915/intel_device_info.c +++ b/drivers/gpu/drm/i915/intel_device_info.c @@ -381,6 +381,13 @@ void intel_device_info_runtime_init_early(struct drm_i915_private *i915) intel_device_info_subplatform_init(i915); } +/* FIXME: Remove this, and make device info a const pointer to rodata. */ +static struct intel_device_info * +mkwrite_device_info(struct drm_i915_private *i915) +{ + return (struct intel_device_info *)INTEL_INFO(i915); +} + /** * intel_device_info_runtime_init - initialize runtime info * @dev_priv: the i915 device @@ -548,6 +555,28 @@ void intel_device_info_runtime_init(struct drm_i915_private *dev_priv) dev_priv->drm.driver_features &= ~DRIVER_ATOMIC; } +/* + * Set up device info and initial runtime info at driver create. + * + * Note: i915 is only an allocated blob of memory at this point. + */ +void intel_device_info_driver_create(struct drm_i915_private *i915, + u16 device_id, + const struct intel_device_info *match_info) +{ + struct intel_device_info *info; + struct intel_runtime_info *runtime; + + /* Setup the write-once "constant" device info */ + info = mkwrite_device_info(i915); + memcpy(info, match_info, sizeof(*info)); + + /* Initialize initial runtime info from static const data and pdev. */ + runtime = RUNTIME_INFO(i915); + memcpy(runtime, &INTEL_INFO(i915)->__runtime, sizeof(*runtime)); + runtime->device_id = device_id; +} + void intel_driver_caps_print(const struct intel_driver_caps *caps, struct drm_printer *p) { diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h index 080a4557899b..f032f2500f50 100644 --- a/drivers/gpu/drm/i915/intel_device_info.h +++ b/drivers/gpu/drm/i915/intel_device_info.h @@ -317,6 +317,8 @@ struct intel_driver_caps { const char *intel_platform_name(enum intel_platform platform); +void intel_device_info_driver_create(struct drm_i915_private *i915, u16 device_id, + const struct intel_device_info *match_info); void intel_device_info_runtime_init_early(struct drm_i915_private *dev_priv); void intel_device_info_runtime_init(struct drm_i915_private *dev_priv); -- 2.39.2
