From: Abdiel Janulgue <[email protected]> CPU mmap implementation depending on the object's backing pages. At the moment we introduce shmem and local-memory BAR fault handlers Note that the mmap type is done one at a time to circumvent the DRM offset manager limitation. Note that we multiplex mmap_gtt and mmap_offset through the same ioctl, and use the zero extending behaviour of drm to differentiate between them, when we inspect the flags.
Signed-off-by: Abdiel Janulgue <[email protected]> Signed-off-by: Matthew Auld <[email protected]> Cc: Joonas Lahtinen <[email protected]> --- drivers/gpu/drm/i915/i915_drv.c | 5 +- drivers/gpu/drm/i915/i915_drv.h | 3 + drivers/gpu/drm/i915/i915_gem.c | 94 ++++++++++++++++++++++---- drivers/gpu/drm/i915/i915_gem_object.h | 10 +++ include/uapi/drm/i915_drm.h | 30 ++++++++ 5 files changed, 126 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index b1200d7ebd13..90785030a0dd 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -423,6 +423,7 @@ static int i915_getparam_ioctl(struct drm_device *dev, void *data, case I915_PARAM_HAS_EXEC_CAPTURE: case I915_PARAM_HAS_EXEC_BATCH_FIRST: case I915_PARAM_HAS_EXEC_FENCE_ARRAY: + case I915_PARAM_MMAP_OFFSET_VERSION: /* For the time being all of these are always true; * if some supported hardware does not have one of these * features this value needs to be provided from @@ -2936,7 +2937,7 @@ const struct dev_pm_ops i915_pm_ops = { static const struct vm_operations_struct i915_gem_vm_ops = { .fault = i915_gem_fault, .open = drm_gem_vm_open, - .close = drm_gem_vm_close, + .close = i915_gem_close, }; static const struct file_operations i915_driver_fops = { @@ -2991,7 +2992,7 @@ static const struct drm_ioctl_desc i915_ioctls[] = { DRM_IOCTL_DEF_DRV(I915_GEM_PREAD, i915_gem_pread_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_PWRITE, i915_gem_pwrite_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_MMAP, i915_gem_mmap_ioctl, DRM_RENDER_ALLOW), - DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, DRM_RENDER_ALLOW), + DRM_IOCTL_DEF_DRV(I915_GEM_MMAP_OFFSET, i915_gem_mmap_gtt_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_SET_TILING, i915_gem_set_tiling_ioctl, DRM_RENDER_ALLOW), diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 065953a9264f..c6ae157d0ede 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -2770,6 +2770,8 @@ int i915_gem_mmap_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); +int i915_gem_mmap_offset_ioctl(struct drm_device *dev, void *data, + struct drm_file *file_priv); int i915_gem_set_domain_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv); int i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data, @@ -3073,6 +3075,7 @@ void i915_gem_suspend_late(struct drm_i915_private *dev_priv); void i915_gem_resume(struct drm_i915_private *dev_priv); int i915_gem_mmap(struct file *filp, struct vm_area_struct *vma); vm_fault_t i915_gem_fault(struct vm_fault *vmf); +void i915_gem_close(struct vm_area_struct *vma); int i915_gem_object_wait(struct drm_i915_gem_object *obj, unsigned int flags, long timeout); diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 48dbb57fbc6d..cc6c88ec749d 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2123,11 +2123,12 @@ static void i915_gem_object_free_mmap_offset(struct drm_i915_gem_object *obj) drm_gem_free_mmap_offset(&obj->base); } -int -i915_gem_mmap_gtt(struct drm_file *file, - struct drm_device *dev, - u32 handle, - u64 *offset) +static int +__assign_gem_object_mmap_data(struct drm_file *file, + u32 handle, + enum i915_cpu_mmap_origin_type mmap_type, + u64 mmap_flags, + u64 *offset) { struct drm_i915_gem_object *obj; int ret; @@ -2136,14 +2137,35 @@ i915_gem_mmap_gtt(struct drm_file *file, if (!obj) return -ENOENT; + if (atomic_read(&obj->mmap_count) && + obj->mmap_origin != mmap_type) { + /* Re-map object with existing different map-type */ + ret = -EINVAL; + goto err; + } + ret = i915_gem_object_create_mmap_offset(obj); - if (ret == 0) + if (ret == 0) { + obj->mmap_origin = mmap_type; + obj->mmap_flags = mmap_flags; *offset = drm_vma_node_offset_addr(&obj->base.vma_node); + } + err: i915_gem_object_put(obj); return ret; } +int +i915_gem_mmap_gtt(struct drm_file *file, + struct drm_device *dev, + u32 handle, + u64 *offset) +{ + return __assign_gem_object_mmap_data(file, handle, I915_MMAP_ORIGIN_GTT, + 0, offset); +} + /** * i915_gem_mmap_gtt_ioctl - prepare an object for GTT mmap'ing * @dev: DRM device @@ -2163,9 +2185,45 @@ int i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { - struct drm_i915_gem_mmap_gtt *args = data; + struct drm_i915_gem_mmap_offset *args = data; + struct drm_i915_private *i915 = to_i915(dev); + + if (args->flags & I915_MMAP_OFFSET_FLAGS) + return i915_gem_mmap_offset_ioctl(dev, data, file); + + if (!HAS_MAPPABLE_APERTURE(i915)) { + DRM_ERROR("No aperture, cannot mmap via legacy GTT\n"); + return -ENODEV; + } + + return __assign_gem_object_mmap_data(file, args->handle, + I915_MMAP_ORIGIN_GTT, + 0, &args->offset); +} + +int i915_gem_mmap_offset_ioctl(struct drm_device *dev, void *data, + struct drm_file *file) +{ + struct drm_i915_gem_mmap_offset *args = data; - return i915_gem_mmap_gtt(file, dev, args->handle, &args->offset); + if ((args->flags & (I915_MMAP_OFFSET_WC | I915_MMAP_OFFSET_WB)) && + !boot_cpu_has(X86_FEATURE_PAT)) + return -ENODEV; + + return __assign_gem_object_mmap_data(file, args->handle, + I915_MMAP_ORIGIN_OFFSET, + args->flags, + &args->offset); +} + +void i915_gem_close(struct vm_area_struct *vma) +{ + struct drm_gem_object *gem = vma->vm_private_data; + struct drm_i915_gem_object *obj = to_intel_bo(gem); + + atomic_dec(&obj->mmap_count); + + drm_gem_vm_close(vma); } int i915_gem_mmap(struct file *filp, struct vm_area_struct *vma) @@ -2178,12 +2236,19 @@ int i915_gem_mmap(struct file *filp, struct vm_area_struct *vma) return ret; obj = to_intel_bo(vma->vm_private_data); - if (obj->memory_region) { - if (obj->mmap_origin == I915_MMAP_ORIGIN_OFFSET) { - vma->vm_flags &= ~VM_PFNMAP; - vma->vm_flags |= VM_MIXEDMAP; - } + if (obj->mmap_origin == I915_MMAP_ORIGIN_OFFSET) { + vma->vm_flags &= ~VM_PFNMAP; + vma->vm_flags |= VM_MIXEDMAP; + if (obj->mmap_flags & I915_MMAP_OFFSET_WC) + vma->vm_page_prot = + pgprot_writecombine(vm_get_page_prot(vma->vm_flags)); + else if (obj->mmap_flags & I915_MMAP_OFFSET_WB) + vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); + else if (obj->mmap_flags & I915_MMAP_OFFSET_UC) + vma->vm_page_prot = + pgprot_noncached(vm_get_page_prot(vma->vm_flags)); } + atomic_inc(&obj->mmap_count); return ret; } @@ -4228,7 +4293,8 @@ int i915_gem_vmf_fill_pages_cpu(struct drm_i915_gem_object *obj, vm_fault_t vmf_ret; pgoff_t pg_off = (vmf->address - area->vm_start) >> PAGE_SHIFT; - if (HAS_MAPPABLE_APERTURE(dev_priv)) + if (HAS_MAPPABLE_APERTURE(dev_priv) && + obj->mmap_origin == I915_MMAP_ORIGIN_GTT) return __vmf_fill_pages_gtt(obj, vmf, page_offset); page = i915_gem_object_get_page(obj, pg_off); diff --git a/drivers/gpu/drm/i915/i915_gem_object.h b/drivers/gpu/drm/i915/i915_gem_object.h index 5c6bbe6f5e84..b37ffe2e17b6 100644 --- a/drivers/gpu/drm/i915/i915_gem_object.h +++ b/drivers/gpu/drm/i915/i915_gem_object.h @@ -86,6 +86,12 @@ struct drm_i915_gem_object_ops { pgoff_t); }; +enum i915_cpu_mmap_origin_type { + I915_MMAP_ORIGIN_NONE = 0, + I915_MMAP_ORIGIN_GTT, + I915_MMAP_ORIGIN_OFFSET, +}; + struct drm_i915_gem_object { struct drm_gem_object base; @@ -157,6 +163,10 @@ struct drm_i915_gem_object { unsigned int userfault_count; struct list_head userfault_link; + enum i915_cpu_mmap_origin_type mmap_origin; + atomic_t mmap_count; + u64 mmap_flags; + struct list_head batch_pool_link; I915_SELFTEST_DECLARE(struct list_head st_link); diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h index 397810fa2d33..26d2274b5d2b 100644 --- a/include/uapi/drm/i915_drm.h +++ b/include/uapi/drm/i915_drm.h @@ -319,6 +319,7 @@ typedef struct _drm_i915_sarea { #define DRM_I915_PERF_ADD_CONFIG 0x37 #define DRM_I915_PERF_REMOVE_CONFIG 0x38 #define DRM_I915_QUERY 0x39 +#define DRM_I915_GEM_MMAP_OFFSET DRM_I915_GEM_MMAP_GTT #define DRM_IOCTL_I915_INIT DRM_IOW( DRM_COMMAND_BASE + DRM_I915_INIT, drm_i915_init_t) #define DRM_IOCTL_I915_FLUSH DRM_IO ( DRM_COMMAND_BASE + DRM_I915_FLUSH) @@ -377,6 +378,7 @@ typedef struct _drm_i915_sarea { #define DRM_IOCTL_I915_PERF_ADD_CONFIG DRM_IOW(DRM_COMMAND_BASE + DRM_I915_PERF_ADD_CONFIG, struct drm_i915_perf_oa_config) #define DRM_IOCTL_I915_PERF_REMOVE_CONFIG DRM_IOW(DRM_COMMAND_BASE + DRM_I915_PERF_REMOVE_CONFIG, __u64) #define DRM_IOCTL_I915_QUERY DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_QUERY, struct drm_i915_query) +#define DRM_IOCTL_I915_GEM_MMAP_OFFSET DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_MMAP_OFFSET, struct drm_i915_gem_mmap_offset) /* Allow drivers to submit batchbuffers directly to hardware, relying * on the security mechanisms provided by hardware. @@ -559,6 +561,9 @@ typedef struct drm_i915_irq_wait { */ #define I915_PARAM_MMAP_GTT_COHERENT 52 +/* Mmap offset ioctl */ +#define I915_PARAM_MMAP_OFFSET_VERSION 55 + typedef struct drm_i915_getparam { __s32 param; /* @@ -731,6 +736,31 @@ struct drm_i915_gem_mmap_gtt { __u64 offset; }; +struct drm_i915_gem_mmap_offset { + /** Handle for the object being mapped. */ + __u32 handle; + __u32 pad; + /** + * Fake offset to use for subsequent mmap call + * + * This is a fixed-size type for 32/64 compatibility. + */ + __u64 offset; + + /** + * Flags for extended behaviour. + * + * It is mandatory that either one of the _WC/_WB flags + * should be passed here. + */ + __u64 flags; +#define I915_MMAP_OFFSET_WC (1 << 0) +#define I915_MMAP_OFFSET_WB (1 << 1) +#define I915_MMAP_OFFSET_UC (1 << 2) +#define I915_MMAP_OFFSET_FLAGS \ + (I915_MMAP_OFFSET_WC | I915_MMAP_OFFSET_WB | I915_MMAP_OFFSET_UC) +}; + struct drm_i915_gem_set_domain { /** Handle for the object */ __u32 handle; -- 2.20.1 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
