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drm_agpsupport.h revision 1.9 
      1 /*	$NetBSD: drm_agpsupport.h,v 1.9 2021/12/18 23:45:45 riastradh Exp $	*/
      2 
      3 /* SPDX-License-Identifier: GPL-2.0 */
      4 #ifndef _DRM_AGPSUPPORT_H_
      5 #define _DRM_AGPSUPPORT_H_
      6 
      7 #include <linux/agp_backend.h>
      8 #include <linux/kernel.h>
      9 #include <linux/list.h>
     10 #include <linux/mm.h>
     11 #include <linux/mutex.h>
     12 #include <linux/types.h>
     13 #include <uapi/drm/drm.h>
     14 
     15 #ifdef __NetBSD__
     16 #include <drm/drm_agp_netbsd.h>
     17 #endif
     18 
     19 struct drm_device;
     20 struct drm_file;
     21 
     22 struct drm_agp_hooks {
     23 	void __pci_iomem *
     24 		(*agph_borrow)(struct drm_device *, unsigned, bus_size_t);
     25 	void	(*agph_flush)(void);
     26 
     27 	struct drm_agp_head *
     28 		(*agph_init)(struct drm_device *);
     29 	void	(*agph_clear)(struct drm_device *);
     30 	int	(*agph_acquire)(struct drm_device *);
     31 	int	(*agph_release)(struct drm_device *);
     32 	int	(*agph_enable)(struct drm_device *, struct drm_agp_mode);
     33 	int	(*agph_info)(struct drm_device *, struct drm_agp_info *);
     34 	int	(*agph_alloc)(struct drm_device *, struct drm_agp_buffer *);
     35 	int	(*agph_free)(struct drm_device *, struct drm_agp_buffer *);
     36 	int	(*agph_bind)(struct drm_device *, struct drm_agp_binding *);
     37 	int	(*agph_unbind)(struct drm_device *, struct drm_agp_binding *);
     38 
     39 	int	(*agph_acquire_ioctl)(struct drm_device *, void *,
     40 		    struct drm_file *);
     41 	int	(*agph_release_ioctl)(struct drm_device *, void *,
     42 		    struct drm_file *);
     43 	int	(*agph_enable_ioctl)(struct drm_device *, void *,
     44 		    struct drm_file *);
     45 	int	(*agph_info_ioctl)(struct drm_device *, void *,
     46 		    struct drm_file *);
     47 	int	(*agph_alloc_ioctl)(struct drm_device *, void *,
     48 		    struct drm_file *);
     49 	int	(*agph_free_ioctl)(struct drm_device *, void *,
     50 		    struct drm_file *);
     51 	int	(*agph_bind_ioctl)(struct drm_device *, void *,
     52 		    struct drm_file *);
     53 	int	(*agph_unbind_ioctl)(struct drm_device *, void *,
     54 		    struct drm_file *);
     55 };
     56 
     57 struct drm_agp_head {
     58 	const struct drm_agp_hooks *hooks;
     59 	struct agp_kern_info agp_info;
     60 	struct list_head memory;
     61 	unsigned long mode;
     62 	struct agp_bridge_data *bridge;
     63 	int enabled;
     64 	int acquired;
     65 	unsigned long base;
     66 	int agp_mtrr;
     67 	int cant_use_aperture;
     68 	unsigned long page_mask;
     69 };
     70 
     71 #if IS_ENABLED(CONFIG_AGP)
     72 
     73 #ifdef __NetBSD__
     74 static inline void drm_free_agp(struct agp_bridge_data *, struct agp_memory *, int);
     75 static inline int drm_bind_agp(struct agp_bridge_data *, struct agp_memory *, unsigned);
     76 static inline int drm_unbind_agp(struct agp_bridge_data *, struct agp_memory *);
     77 #else
     78 void drm_free_agp(struct agp_memory * handle, int pages);
     79 int drm_bind_agp(struct agp_memory * handle, unsigned int start);
     80 int drm_unbind_agp(struct agp_memory * handle);
     81 #endif
     82 
     83 struct drm_agp_head *drm_agp_init(struct drm_device *dev);
     84 void drm_legacy_agp_clear(struct drm_device *dev);
     85 int drm_agp_acquire(struct drm_device *dev);
     86 int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
     87 			  struct drm_file *file_priv);
     88 int drm_agp_release(struct drm_device *dev);
     89 int drm_agp_release_ioctl(struct drm_device *dev, void *data,
     90 			  struct drm_file *file_priv);
     91 int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
     92 int drm_agp_enable_ioctl(struct drm_device *dev, void *data,
     93 			 struct drm_file *file_priv);
     94 int drm_agp_info(struct drm_device *dev, struct drm_agp_info *info);
     95 int drm_agp_info_ioctl(struct drm_device *dev, void *data,
     96 		       struct drm_file *file_priv);
     97 int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
     98 int drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
     99 			struct drm_file *file_priv);
    100 int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
    101 int drm_agp_free_ioctl(struct drm_device *dev, void *data,
    102 		       struct drm_file *file_priv);
    103 int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);
    104 int drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
    105 			 struct drm_file *file_priv);
    106 int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
    107 int drm_agp_bind_ioctl(struct drm_device *dev, void *data,
    108 		       struct drm_file *file_priv);
    109 
    110 #ifdef __NetBSD__
    111 void __pci_iomem *drm_agp_borrow(struct drm_device *, unsigned, bus_size_t);
    112 void drm_agp_flush(void);
    113 void drm_agp_fini(struct drm_device *);
    114 int drm_agp_register(const struct drm_agp_hooks *);
    115 int drm_agp_deregister(const struct drm_agp_hooks *);
    116 void drm_agp_hooks_init(void);
    117 void drm_agp_hooks_fini(void);
    118 int drmkms_agp_guarantee_initialized(void);
    119 #endif
    120 
    121 #else /* CONFIG_AGP */
    122 
    123 #if !defined(__NetBSD__)
    124 
    125 static inline void drm_free_agp(struct agp_memory * handle, int pages)
    126 {
    127 }
    128 
    129 static inline int drm_bind_agp(struct agp_memory * handle, unsigned int start)
    130 {
    131 	return -ENODEV;
    132 }
    133 
    134 static inline int drm_unbind_agp(struct agp_memory * handle)
    135 {
    136 	return -ENODEV;
    137 }
    138 #endif
    139 
    140 static inline struct drm_agp_head *drm_agp_init(struct drm_device *dev)
    141 {
    142 	return NULL;
    143 }
    144 
    145 static inline void drm_legacy_agp_clear(struct drm_device *dev)
    146 {
    147 }
    148 
    149 static inline int drm_agp_acquire(struct drm_device *dev)
    150 {
    151 	return -ENODEV;
    152 }
    153 
    154 static inline int drm_agp_release(struct drm_device *dev)
    155 {
    156 	return -ENODEV;
    157 }
    158 
    159 static inline int drm_agp_enable(struct drm_device *dev,
    160 				 struct drm_agp_mode mode)
    161 {
    162 	return -ENODEV;
    163 }
    164 
    165 static inline int drm_agp_info(struct drm_device *dev,
    166 			       struct drm_agp_info *info)
    167 {
    168 	return -ENODEV;
    169 }
    170 
    171 static inline int drm_agp_alloc(struct drm_device *dev,
    172 				struct drm_agp_buffer *request)
    173 {
    174 	return -ENODEV;
    175 }
    176 
    177 static inline int drm_agp_free(struct drm_device *dev,
    178 			       struct drm_agp_buffer *request)
    179 {
    180 	return -ENODEV;
    181 }
    182 
    183 static inline int drm_agp_unbind(struct drm_device *dev,
    184 				 struct drm_agp_binding *request)
    185 {
    186 	return -ENODEV;
    187 }
    188 
    189 static inline int drm_agp_bind(struct drm_device *dev,
    190 			       struct drm_agp_binding *request)
    191 {
    192 	return -ENODEV;
    193 }
    194 
    195 #endif /* CONFIG_AGP */
    196 
    197 #endif /* _DRM_AGPSUPPORT_H_ */
    198