LXR linux/drivers/gpu/drm/via/via

   1/*
   2 * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
   3 * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
   4 *
   5 * Permission is hereby granted, free of charge, to any person obtaining a
   6 * copy of this software and associated documentation files (the "Software"),
   7 * to deal in the Software without restriction, including without limitation
   8 * the rights to use, copy, modify, merge, publish, distribute, sub license,
   9 * and/or sell copies of the Software, and to permit persons to whom the
  10 * Software is furnished to do so, subject to the following conditions:
  11 *
  12 * The above copyright notice and this permission notice (including the
  13 * next paragraph) shall be included in all copies or substantial portions
  14 * of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19 * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22 * DEALINGS IN THE SOFTWARE.
  23 */
  24#ifndef _VIA_DRV_H_
  25#define _VIA_DRV_H_
  26
  27#include <linux/irqreturn.h>
  28#include <linux/jiffies.h>
  29#include <linux/sched.h>
  30#include <linux/sched/signal.h>
  31#include <linux/wait.h>
  32
  33#include <drm/drm_ioctl.h>
  34#include <drm/drm_legacy.h>
  35#include <drm/drm_mm.h>
  36#include <drm/via_drm.h>
  37
  38#define DRIVER_AUTHOR   "Various"
  39
  40#define DRIVER_NAME             "via"
  41#define DRIVER_DESC             "VIA Unichrome / Pro"
  42#define DRIVER_DATE             "20070202"
  43
  44#define DRIVER_MAJOR            2
  45#define DRIVER_MINOR            11
  46#define DRIVER_PATCHLEVEL       1
  47
  48#include "via_verifier.h"
  49
  50#include "via_dmablit.h"
  51
  52#define VIA_PCI_BUF_SIZE 60000
  53#define VIA_FIRE_BUF_SIZE  1024
  54#define VIA_NUM_IRQS 4
  55
  56typedef struct drm_via_ring_buffer {
  57        drm_local_map_t map;
  58        char *virtual_start;
  59} drm_via_ring_buffer_t;
  60
  61typedef uint32_t maskarray_t[5];
  62
  63typedef struct drm_via_irq {
  64        atomic_t irq_received;
  65        uint32_t pending_mask;
  66        uint32_t enable_mask;
  67        wait_queue_head_t irq_queue;
  68} drm_via_irq_t;
  69
  70typedef struct drm_via_private {
  71        drm_via_sarea_t *sarea_priv;
  72        drm_local_map_t *sarea;
  73        drm_local_map_t *fb;
  74        drm_local_map_t *mmio;
  75        unsigned long agpAddr;
  76        wait_queue_head_t decoder_queue[VIA_NR_XVMC_LOCKS];
  77        char *dma_ptr;
  78        unsigned int dma_low;
  79        unsigned int dma_high;
  80        unsigned int dma_offset;
  81        uint32_t dma_wrap;
  82        volatile uint32_t *last_pause_ptr;
  83        volatile uint32_t *hw_addr_ptr;
  84        drm_via_ring_buffer_t ring;
  85        ktime_t last_vblank;
  86        int last_vblank_valid;
  87        ktime_t nsec_per_vblank;
  88        atomic_t vbl_received;
  89        drm_via_state_t hc_state;
  90        char pci_buf[VIA_PCI_BUF_SIZE];
  91        const uint32_t *fire_offsets[VIA_FIRE_BUF_SIZE];
  92        uint32_t num_fire_offsets;
  93        int chipset;
  94        drm_via_irq_t via_irqs[VIA_NUM_IRQS];
  95        unsigned num_irqs;
  96        maskarray_t *irq_masks;
  97        uint32_t irq_enable_mask;
  98        uint32_t irq_pending_mask;
  99        int *irq_map;
 100        unsigned int idle_fault;
 101        int vram_initialized;
 102        struct drm_mm vram_mm;
 103        int agp_initialized;
 104        struct drm_mm agp_mm;
 105        /** Mapping of userspace keys to mm objects */
 106        struct idr object_idr;
 107        unsigned long vram_offset;
 108        unsigned long agp_offset;
 109        drm_via_blitq_t blit_queues[VIA_NUM_BLIT_ENGINES];
 110        uint32_t dma_diff;
 111} drm_via_private_t;
 112
 113struct via_file_private {
 114        struct list_head obj_list;
 115};
 116
 117enum via_family {
 118  VIA_OTHER = 0,     /* Baseline */
 119  VIA_PRO_GROUP_A,   /* Another video engine and DMA commands */
 120  VIA_DX9_0          /* Same video as pro_group_a, but 3D is unsupported */
 121};
 122
 123/* VIA MMIO register access */
 124static inline u32 via_read(struct drm_via_private *dev_priv, u32 reg)
 125{
 126        return readl((void __iomem *)(dev_priv->mmio->handle + reg));
 127}
 128
 129static inline void via_write(struct drm_via_private *dev_priv, u32 reg,
 130                             u32 val)
 131{
 132        writel(val, (void __iomem *)(dev_priv->mmio->handle + reg));
 133}
 134
 135static inline void via_write8(struct drm_via_private *dev_priv, u32 reg,
 136                              u32 val)
 137{
 138        writeb(val, (void __iomem *)(dev_priv->mmio->handle + reg));
 139}
 140
 141static inline void via_write8_mask(struct drm_via_private *dev_priv,
 142                                   u32 reg, u32 mask, u32 val)
 143{
 144        u32 tmp;
 145
 146        tmp = readb((void __iomem *)(dev_priv->mmio->handle + reg));
 147        tmp = (tmp & ~mask) | (val & mask);
 148        writeb(tmp, (void __iomem *)(dev_priv->mmio->handle + reg));
 149}
 150
 151/*
 152 * Poll in a loop waiting for 'contidition' to be true.
 153 * Note: A direct replacement with wait_event_interruptible_timeout()
 154 *       will not work unless driver is updated to emit wake_up()
 155 *       in relevant places that can impact the 'condition'
 156 *
 157 * Returns:
 158 *   ret keeps current value if 'condition' becomes true
 159 *   ret = -BUSY if timeout happens
 160 *   ret = -EINTR if a signal interrupted the waiting period
 161 */
 162#define VIA_WAIT_ON( ret, queue, timeout, condition )           \
 163do {                                                            \
 164        DECLARE_WAITQUEUE(entry, current);                      \
 165        unsigned long end = jiffies + (timeout);                \
 166        add_wait_queue(&(queue), &entry);                       \
 167                                                                \
 168        for (;;) {                                              \
 169                __set_current_state(TASK_INTERRUPTIBLE);        \
 170                if (condition)                                  \
 171                        break;                                  \
 172                if (time_after_eq(jiffies, end)) {              \
 173                        ret = -EBUSY;                           \
 174                        break;                                  \
 175                }                                               \
 176                schedule_timeout((HZ/100 > 1) ? HZ/100 : 1);    \
 177                if (signal_pending(current)) {                  \
 178                        ret = -EINTR;                           \
 179                        break;                                  \
 180                }                                               \
 181        }                                                       \
 182        __set_current_state(TASK_RUNNING);                      \
 183        remove_wait_queue(&(queue), &entry);                    \
 184} while (0)
 185
 186extern const struct drm_ioctl_desc via_ioctls[];
 187extern int via_max_ioctl;
 188
 189extern int via_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv);
 190extern int via_mem_alloc(struct drm_device *dev, void *data, struct drm_file *file_priv);
 191extern int via_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv);
 192extern int via_agp_init(struct drm_device *dev, void *data, struct drm_file *file_priv);
 193extern int via_map_init(struct drm_device *dev, void *data, struct drm_file *file_priv);
 194extern int via_decoder_futex(struct drm_device *dev, void *data, struct drm_file *file_priv);
 195extern int via_wait_irq(struct drm_device *dev, void *data, struct drm_file *file_priv);
 196extern int via_dma_blit_sync(struct drm_device *dev, void *data, struct drm_file *file_priv);
 197extern int via_dma_blit(struct drm_device *dev, void *data, struct drm_file *file_priv);
 198
 199extern int via_driver_load(struct drm_device *dev, unsigned long chipset);
 200extern void via_driver_unload(struct drm_device *dev);
 201
 202extern int via_init_context(struct drm_device *dev, int context);
 203extern int via_final_context(struct drm_device *dev, int context);
 204
 205extern int via_do_cleanup_map(struct drm_device *dev);
 206extern u32 via_get_vblank_counter(struct drm_device *dev, unsigned int pipe);
 207extern int via_enable_vblank(struct drm_device *dev, unsigned int pipe);
 208extern void via_disable_vblank(struct drm_device *dev, unsigned int pipe);
 209
 210extern irqreturn_t via_driver_irq_handler(int irq, void *arg);
 211extern void via_driver_irq_preinstall(struct drm_device *dev);
 212extern int via_driver_irq_postinstall(struct drm_device *dev);
 213extern void via_driver_irq_uninstall(struct drm_device *dev);
 214
 215extern int via_dma_cleanup(struct drm_device *dev);
 216extern void via_init_command_verifier(void);
 217extern int via_driver_dma_quiescent(struct drm_device *dev);
 218extern void via_init_futex(drm_via_private_t *dev_priv);
 219extern void via_cleanup_futex(drm_via_private_t *dev_priv);
 220extern void via_release_futex(drm_via_private_t *dev_priv, int context);
 221
 222extern void via_reclaim_buffers_locked(struct drm_device *dev,
 223                                       struct drm_file *file_priv);
 224extern void via_lastclose(struct drm_device *dev);
 225
 226extern void via_dmablit_handler(struct drm_device *dev, int engine, int from_irq);
 227extern void via_init_dmablit(struct drm_device *dev);
 228
 229#endif
 230