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ps3fb.c

/*
 *  linux/drivers/video/ps3fb.c -- PS3 GPU frame buffer device
 *
 *    Copyright (C) 2006 Sony Computer Entertainment Inc.
 *    Copyright 2006, 2007 Sony Corporation
 *
 *  This file is based on :
 *
 *  linux/drivers/video/vfb.c -- Virtual frame buffer device
 *
 *    Copyright (C) 2002 James Simmons
 *
 *    Copyright (C) 1997 Geert Uytterhoeven
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License. See the file COPYING in the main directory of this archive for
 *  more details.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/console.h>
#include <linux/ioctl.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/uaccess.h>
#include <linux/fb.h>
#include <linux/init.h>

#include <asm/abs_addr.h>
#include <asm/lv1call.h>
#include <asm/ps3av.h>
#include <asm/ps3fb.h>
#include <asm/ps3.h>


#define DEVICE_NAME           "ps3fb"

#define L1GPU_CONTEXT_ATTRIBUTE_DISPLAY_SYNC    0x101
#define L1GPU_CONTEXT_ATTRIBUTE_DISPLAY_FLIP    0x102
#define L1GPU_CONTEXT_ATTRIBUTE_FB_SETUP  0x600
#define L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT         0x601
#define L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT_SYNC    0x602

#define L1GPU_FB_BLIT_WAIT_FOR_COMPLETION (1ULL << 32)

#define L1GPU_DISPLAY_SYNC_HSYNC          1
#define L1GPU_DISPLAY_SYNC_VSYNC          2

#define GPU_CMD_BUF_SIZE                  (2 * 1024 * 1024)
#define GPU_FB_START                      (64 * 1024)
#define GPU_IOIF                    (0x0d000000UL)
#define GPU_ALIGN_UP(x)                   _ALIGN_UP((x), 64)
#define GPU_MAX_LINE_LENGTH               (65536 - 64)

#define PS3FB_FULL_MODE_BIT               0x80

#define GPU_INTR_STATUS_VSYNC_0                 0     /* vsync on head A */
#define GPU_INTR_STATUS_VSYNC_1                 1     /* vsync on head B */
#define GPU_INTR_STATUS_FLIP_0                  3     /* flip head A */
#define GPU_INTR_STATUS_FLIP_1                  4     /* flip head B */
#define GPU_INTR_STATUS_QUEUE_0                 5     /* queue head A */
#define GPU_INTR_STATUS_QUEUE_1                 6     /* queue head B */

#define GPU_DRIVER_INFO_VERSION                 0x211

/* gpu internals */
struct display_head {
      u64 be_time_stamp;
      u32 status;
      u32 offset;
      u32 res1;
      u32 res2;
      u32 field;
      u32 reserved1;

      u64 res3;
      u32 raster;

      u64 vblank_count;
      u32 field_vsync;
      u32 reserved2;
};

struct gpu_irq {
      u32 irq_outlet;
      u32 status;
      u32 mask;
      u32 video_cause;
      u32 graph_cause;
      u32 user_cause;

      u32 res1;
      u64 res2;

      u32 reserved[4];
};

struct gpu_driver_info {
      u32 version_driver;
      u32 version_gpu;
      u32 memory_size;
      u32 hardware_channel;

      u32 nvcore_frequency;
      u32 memory_frequency;

      u32 reserved[1063];
      struct display_head display_head[8];
      struct gpu_irq irq;
};

struct ps3fb_priv {
      unsigned int irq_no;

      u64 context_handle, memory_handle;
      void *xdr_ea;
      size_t xdr_size;
      struct gpu_driver_info *dinfo;

      u64 vblank_count; /* frame count */
      wait_queue_head_t wait_vsync;

      atomic_t ext_flip;      /* on/off flip with vsync */
      atomic_t f_count; /* fb_open count */
      int is_blanked;
      int is_kicked;
      struct task_struct *task;
};
static struct ps3fb_priv ps3fb;

struct ps3fb_par {
      u32 pseudo_palette[16];
      int mode_id, new_mode_id;
      int res_index;
      unsigned int num_frames;      /* num of frame buffers */
      unsigned int width;
      unsigned int height;
      unsigned long full_offset;    /* start of fullscreen DDR fb */
      unsigned long fb_offset;      /* start of actual DDR fb */
      unsigned long pan_offset;
};

struct ps3fb_res_table {
      u32 xres;
      u32 yres;
      u32 xoff;
      u32 yoff;
      u32 type;
};
#define PS3FB_RES_FULL 1
static const struct ps3fb_res_table ps3fb_res[] = {
      /* res_x,y   margin_x,y  full */
      {  720,  480,  72,  48 , 0},
      {  720,  576,  72,  58 , 0},
      { 1280,  720,  78,  38 , 0},
      { 1920, 1080, 116,  58 , 0},
      /* full mode */
      {  720,  480,   0,   0 , PS3FB_RES_FULL},
      {  720,  576,   0,   0 , PS3FB_RES_FULL},
      { 1280,  720,   0,   0 , PS3FB_RES_FULL},
      { 1920, 1080,   0,   0 , PS3FB_RES_FULL},
      /* vesa: normally full mode */
      { 1280,  768,   0,   0 , 0},
      { 1280, 1024,   0,   0 , 0},
      { 1920, 1200,   0,   0 , 0},
      {    0,    0,   0,   0 , 0} };

/* default resolution */
#define GPU_RES_INDEX   0           /* 720 x 480 */

static const struct fb_videomode ps3fb_modedb[] = {
    /* 60 Hz broadcast modes (modes "1" to "5") */
    {
        /* 480i */
        "480i", 60, 576, 384, 74074, 130, 89, 78, 57, 63, 6,
        FB_SYNC_BROADCAST, FB_VMODE_INTERLACED
    },    {
        /* 480p */
        "480p", 60, 576, 384, 37037, 130, 89, 78, 57, 63, 6,
        FB_SYNC_BROADCAST, FB_VMODE_NONINTERLACED
    },    {
        /* 720p */
        "720p", 60, 1124, 644, 13481, 298, 148, 57, 44, 80, 5,
        FB_SYNC_BROADCAST, FB_VMODE_NONINTERLACED
    },    {
        /* 1080i */
        "1080i", 60, 1688, 964, 13481, 264, 160, 94, 62, 88, 5,
        FB_SYNC_BROADCAST, FB_VMODE_INTERLACED
    },    {
        /* 1080p */
        "1080p", 60, 1688, 964, 6741, 264, 160, 94, 62, 88, 5,
        FB_SYNC_BROADCAST, FB_VMODE_NONINTERLACED
    },

    /* 50 Hz broadcast modes (modes "6" to "10") */
    {
        /* 576i */
        "576i", 50, 576, 460, 74074, 142, 83, 97, 63, 63, 5,
        FB_SYNC_BROADCAST, FB_VMODE_INTERLACED
    },    {
        /* 576p */
        "576p", 50, 576, 460, 37037, 142, 83, 97, 63, 63, 5,
        FB_SYNC_BROADCAST, FB_VMODE_NONINTERLACED
    },    {
        /* 720p */
        "720p", 50, 1124, 644, 13468, 298, 478, 57, 44, 80, 5,
        FB_SYNC_BROADCAST, FB_VMODE_NONINTERLACED
    },    {
        /* 1080 */
        "1080i", 50, 1688, 964, 13468, 264, 600, 94, 62, 88, 5,
        FB_SYNC_BROADCAST, FB_VMODE_INTERLACED
    },    {
        /* 1080p */
        "1080p", 50, 1688, 964, 6734, 264, 600, 94, 62, 88, 5,
        FB_SYNC_BROADCAST, FB_VMODE_NONINTERLACED
    },

    /* VESA modes (modes "11" to "13") */
    {
      /* WXGA */
      "wxga", 60, 1280, 768, 12924, 160, 24, 29, 3, 136, 6,
      0, FB_VMODE_NONINTERLACED,
      FB_MODE_IS_VESA
    }, {
      /* SXGA */
      "sxga", 60, 1280, 1024, 9259, 248, 48, 38, 1, 112, 3,
      FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED,
      FB_MODE_IS_VESA
    }, {
      /* WUXGA */
      "wuxga", 60, 1920, 1200, 6494, 80, 48, 26, 3, 32, 6,
      FB_SYNC_HOR_HIGH_ACT, FB_VMODE_NONINTERLACED,
      FB_MODE_IS_VESA
    },

    /* 60 Hz broadcast modes (full resolution versions of modes "1" to "5") */
    {
      /* 480if */
      "480if", 60, 720, 480, 74074, 58, 17, 30, 9, 63, 6,
      FB_SYNC_BROADCAST, FB_VMODE_INTERLACED
    }, {
      /* 480pf */
      "480pf", 60, 720, 480, 37037, 58, 17, 30, 9, 63, 6,
      FB_SYNC_BROADCAST, FB_VMODE_NONINTERLACED
    }, {
      /* 720pf */
      "720pf", 60, 1280, 720, 13481, 220, 70, 19, 6, 80, 5,
      FB_SYNC_BROADCAST, FB_VMODE_NONINTERLACED
    }, {
      /* 1080if */
      "1080if", 60, 1920, 1080, 13481, 148, 44, 36, 4, 88, 5,
      FB_SYNC_BROADCAST, FB_VMODE_INTERLACED
    }, {
      /* 1080pf */
      "1080pf", 60, 1920, 1080, 6741, 148, 44, 36, 4, 88, 5,
      FB_SYNC_BROADCAST, FB_VMODE_NONINTERLACED
    },

    /* 50 Hz broadcast modes (full resolution versions of modes "6" to "10") */
    {
      /* 576if */
      "576if", 50, 720, 576, 74074, 70, 11, 39, 5, 63, 5,
      FB_SYNC_BROADCAST, FB_VMODE_INTERLACED
    }, {
      /* 576pf */
      "576pf", 50, 720, 576, 37037, 70, 11, 39, 5, 63, 5,
      FB_SYNC_BROADCAST, FB_VMODE_NONINTERLACED
    }, {
      /* 720pf */
      "720pf", 50, 1280, 720, 13468, 220, 400, 19, 6, 80, 5,
      FB_SYNC_BROADCAST, FB_VMODE_NONINTERLACED
    }, {
      /* 1080if */
      "1080f", 50, 1920, 1080, 13468, 148, 484, 36, 4, 88, 5,
      FB_SYNC_BROADCAST, FB_VMODE_INTERLACED
    }, {
      /* 1080pf */
      "1080pf", 50, 1920, 1080, 6734, 148, 484, 36, 4, 88, 5,
      FB_SYNC_BROADCAST, FB_VMODE_NONINTERLACED
    }
};


#define HEAD_A
#define HEAD_B

#define X_OFF(i)  (ps3fb_res[i].xoff)     /* left/right margin (pixel) */
#define Y_OFF(i)  (ps3fb_res[i].yoff)     /* top/bottom margin (pixel) */
#define WIDTH(i)  (ps3fb_res[i].xres)     /* width of FB */
#define HEIGHT(i) (ps3fb_res[i].yres)     /* height of FB */
#define BPP       4                 /* number of bytes per pixel */

/* Start of the virtual frame buffer (relative to fullscreen ) */
#define VP_OFF(i) ((WIDTH(i) * Y_OFF(i) + X_OFF(i)) * BPP)


static int ps3fb_mode;
module_param(ps3fb_mode, int, 0);

static char *mode_option __devinitdata;

static int ps3fb_get_res_table(u32 xres, u32 yres, int mode)
{
      int full_mode;
      unsigned int i;
      u32 x, y, f;

      full_mode = (mode & PS3FB_FULL_MODE_BIT) ? PS3FB_RES_FULL : 0;
      for (i = 0;; i++) {
            x = ps3fb_res[i].xres;
            y = ps3fb_res[i].yres;
            f = ps3fb_res[i].type;

            if (!x) {
                  pr_debug("ERROR: ps3fb_get_res_table()\n");
                  return -1;
            }

            if (full_mode == PS3FB_RES_FULL && f != PS3FB_RES_FULL)
                  continue;

            if (x == xres && (yres == 0 || y == yres))
                  break;

            x = x - 2 * ps3fb_res[i].xoff;
            y = y - 2 * ps3fb_res[i].yoff;
            if (x == xres && (yres == 0 || y == yres))
                  break;
      }
      return i;
}

static unsigned int ps3fb_find_mode(const struct fb_var_screeninfo *var,
                            u32 *ddr_line_length, u32 *xdr_line_length)
{
      unsigned int i, mode;

      for (i = 0; i < ARRAY_SIZE(ps3fb_modedb); i++)
            if (var->xres == ps3fb_modedb[i].xres &&
                var->yres == ps3fb_modedb[i].yres &&
                var->pixclock == ps3fb_modedb[i].pixclock &&
                var->hsync_len == ps3fb_modedb[i].hsync_len &&
                var->vsync_len == ps3fb_modedb[i].vsync_len &&
                var->left_margin == ps3fb_modedb[i].left_margin &&
                var->right_margin == ps3fb_modedb[i].right_margin &&
                var->upper_margin == ps3fb_modedb[i].upper_margin &&
                var->lower_margin == ps3fb_modedb[i].lower_margin &&
                var->sync == ps3fb_modedb[i].sync &&
                (var->vmode & FB_VMODE_MASK) == ps3fb_modedb[i].vmode)
                  goto found;

      pr_debug("ps3fb_find_mode: mode not found\n");
      return 0;

found:
      /* Cropped broadcast modes use the full line length */
      *ddr_line_length = ps3fb_modedb[i < 10 ? i + 13 : i].xres * BPP;

      if (ps3_compare_firmware_version(1, 9, 0) >= 0) {
            *xdr_line_length = GPU_ALIGN_UP(max(var->xres,
                                        var->xres_virtual) * BPP);
            if (*xdr_line_length > GPU_MAX_LINE_LENGTH)
                  *xdr_line_length = GPU_MAX_LINE_LENGTH;
      } else
            *xdr_line_length = *ddr_line_length;

      /* Full broadcast modes have the full mode bit set */
      mode = i > 12 ? (i - 12) | PS3FB_FULL_MODE_BIT : i + 1;

      pr_debug("ps3fb_find_mode: mode %u\n", mode);

      return mode;
}

static const struct fb_videomode *ps3fb_default_mode(int id)
{
      u32 mode = id & PS3AV_MODE_MASK;
      u32 flags;

      if (mode < 1 || mode > 13)
            return NULL;

      flags = id & ~PS3AV_MODE_MASK;

      if (mode <= 10 && flags & PS3FB_FULL_MODE_BIT) {
            /* Full broadcast mode */
            return &ps3fb_modedb[mode + 12];
      }

      return &ps3fb_modedb[mode - 1];
}

static void ps3fb_sync_image(struct device *dev, u64 frame_offset,
                       u64 dst_offset, u64 src_offset, u32 width,
                       u32 height, u32 dst_line_length,
                       u32 src_line_length)
{
      int status;
      u64 line_length;

      line_length = dst_line_length;
      if (src_line_length != dst_line_length)
            line_length |= (u64)src_line_length << 32;

      src_offset += GPU_FB_START;
      status = lv1_gpu_context_attribute(ps3fb.context_handle,
                                 L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT,
                                 dst_offset, GPU_IOIF + src_offset,
                                 L1GPU_FB_BLIT_WAIT_FOR_COMPLETION |
                                 (width << 16) | height,
                                 line_length);
      if (status)
            dev_err(dev,
                  "%s: lv1_gpu_context_attribute FB_BLIT failed: %d\n",
                  __func__, status);
#ifdef HEAD_A
      status = lv1_gpu_context_attribute(ps3fb.context_handle,
                                 L1GPU_CONTEXT_ATTRIBUTE_DISPLAY_FLIP,
                                 0, frame_offset, 0, 0);
      if (status)
            dev_err(dev, "%s: lv1_gpu_context_attribute FLIP failed: %d\n",
                  __func__, status);
#endif
#ifdef HEAD_B
      status = lv1_gpu_context_attribute(ps3fb.context_handle,
                                 L1GPU_CONTEXT_ATTRIBUTE_DISPLAY_FLIP,
                                 1, frame_offset, 0, 0);
      if (status)
            dev_err(dev, "%s: lv1_gpu_context_attribute FLIP failed: %d\n",
                  __func__, status);
#endif
}

static int ps3fb_sync(struct fb_info *info, u32 frame)
{
      struct ps3fb_par *par = info->par;
      int i, error = 0;
      u32 ddr_line_length, xdr_line_length;
      u64 ddr_base, xdr_base;

      if (frame > par->num_frames - 1) {
            dev_dbg(info->device, "%s: invalid frame number (%u)\n",
                  __func__, frame);
            error = -EINVAL;
            goto out;
      }

      i = par->res_index;
      xdr_line_length = info->fix.line_length;
      ddr_line_length = ps3fb_res[i].xres * BPP;
      xdr_base = frame * info->var.yres_virtual * xdr_line_length;
      ddr_base = frame * ps3fb_res[i].yres * ddr_line_length;

      ps3fb_sync_image(info->device, ddr_base + par->full_offset,
                   ddr_base + par->fb_offset, xdr_base + par->pan_offset,
                   par->width, par->height, ddr_line_length,
                   xdr_line_length);

out:
      return error;
}

static int ps3fb_open(struct fb_info *info, int user)
{
      atomic_inc(&ps3fb.f_count);
      return 0;
}

static int ps3fb_release(struct fb_info *info, int user)
{
      if (atomic_dec_and_test(&ps3fb.f_count)) {
            if (atomic_read(&ps3fb.ext_flip)) {
                  atomic_set(&ps3fb.ext_flip, 0);
                  if (!try_acquire_console_sem()) {
                        ps3fb_sync(info, 0);    /* single buffer */
                        release_console_sem();
                  }
            }
      }
      return 0;
}

    /*
     *  Setting the video mode has been split into two parts.
     *  First part, xxxfb_check_var, must not write anything
     *  to hardware, it should only verify and adjust var.
     *  This means it doesn't alter par but it does use hardware
     *  data from it to check this var.
     */

static int ps3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
      u32 xdr_line_length, ddr_line_length;
      int mode;

      dev_dbg(info->device, "var->xres:%u info->var.xres:%u\n", var->xres,
            info->var.xres);
      dev_dbg(info->device, "var->yres:%u info->var.yres:%u\n", var->yres,
            info->var.yres);

      /* FIXME For now we do exact matches only */
      mode = ps3fb_find_mode(var, &ddr_line_length, &xdr_line_length);
      if (!mode)
            return -EINVAL;

      /* Virtual screen */
      if (var->xres_virtual < var->xres)
            var->xres_virtual = var->xres;
      if (var->yres_virtual < var->yres)
            var->yres_virtual = var->yres;

      if (var->xres_virtual > xdr_line_length / BPP) {
            dev_dbg(info->device,
                  "Horizontal virtual screen size too large\n");
            return -EINVAL;
      }

      if (var->xoffset + var->xres > var->xres_virtual ||
          var->yoffset + var->yres > var->yres_virtual) {
            dev_dbg(info->device, "panning out-of-range\n");
            return -EINVAL;
      }

      /* We support ARGB8888 only */
      if (var->bits_per_pixel > 32 || var->grayscale ||
          var->red.offset > 16 || var->green.offset > 8 ||
          var->blue.offset > 0 || var->transp.offset > 24 ||
          var->red.length > 8 || var->green.length > 8 ||
          var->blue.length > 8 || var->transp.length > 8 ||
          var->red.msb_right || var->green.msb_right ||
          var->blue.msb_right || var->transp.msb_right || var->nonstd) {
            dev_dbg(info->device, "We support ARGB8888 only\n");
            return -EINVAL;
      }

      var->bits_per_pixel = 32;
      var->red.offset = 16;
      var->green.offset = 8;
      var->blue.offset = 0;
      var->transp.offset = 24;
      var->red.length = 8;
      var->green.length = 8;
      var->blue.length = 8;
      var->transp.length = 8;
      var->red.msb_right = 0;
      var->green.msb_right = 0;
      var->blue.msb_right = 0;
      var->transp.msb_right = 0;

      /* Rotation is not supported */
      if (var->rotate) {
            dev_dbg(info->device, "Rotation is not supported\n");
            return -EINVAL;
      }

      /* Memory limit */
      if (var->yres_virtual * xdr_line_length > ps3fb.xdr_size) {
            dev_dbg(info->device, "Not enough memory\n");
            return -ENOMEM;
      }

      var->height = -1;
      var->width = -1;

      return 0;
}

    /*
     * This routine actually sets the video mode.
     */

static int ps3fb_set_par(struct fb_info *info)
{
      struct ps3fb_par *par = info->par;
      unsigned int mode, ddr_line_length, xdr_line_length, lines, maxlines;
      int i;
      unsigned long offset;
      u64 dst;

      dev_dbg(info->device, "xres:%d xv:%d yres:%d yv:%d clock:%d\n",
            info->var.xres, info->var.xres_virtual,
            info->var.yres, info->var.yres_virtual, info->var.pixclock);

      mode = ps3fb_find_mode(&info->var, &ddr_line_length, &xdr_line_length);
      if (!mode)
            return -EINVAL;

      i = ps3fb_get_res_table(info->var.xres, info->var.yres, mode);
      par->res_index = i;

      info->fix.smem_start = virt_to_abs(ps3fb.xdr_ea);
      info->fix.smem_len = ps3fb.xdr_size;
      info->fix.xpanstep = info->var.xres_virtual > info->var.xres ? 1 : 0;
      info->fix.ypanstep = info->var.yres_virtual > info->var.yres ? 1 : 0;
      info->fix.line_length = xdr_line_length;

      info->screen_base = (char __iomem *)ps3fb.xdr_ea;

      par->num_frames = ps3fb.xdr_size /
                    max(ps3fb_res[i].yres * ddr_line_length,
                        info->var.yres_virtual * xdr_line_length);

      /* Keep the special bits we cannot set using fb_var_screeninfo */
      par->new_mode_id = (par->new_mode_id & ~PS3AV_MODE_MASK) | mode;

      par->width = info->var.xres;
      par->height = info->var.yres;
      offset = VP_OFF(i);
      par->fb_offset = GPU_ALIGN_UP(offset);
      par->full_offset = par->fb_offset - offset;
      par->pan_offset = info->var.yoffset * xdr_line_length +
                    info->var.xoffset * BPP;

      if (par->new_mode_id != par->mode_id) {
            if (ps3av_set_video_mode(par->new_mode_id)) {
                  par->new_mode_id = par->mode_id;
                  return -EINVAL;
            }
            par->mode_id = par->new_mode_id;
      }

      /* Clear XDR frame buffer memory */
      memset(ps3fb.xdr_ea, 0, ps3fb.xdr_size);

      /* Clear DDR frame buffer memory */
      lines = ps3fb_res[i].yres * par->num_frames;
      if (par->full_offset)
            lines++;
      maxlines = ps3fb.xdr_size / ddr_line_length;
      for (dst = 0; lines; dst += maxlines * ddr_line_length) {
            unsigned int l = min(lines, maxlines);
            ps3fb_sync_image(info->device, 0, dst, 0, ps3fb_res[i].xres, l,
                         ddr_line_length, ddr_line_length);
            lines -= l;
      }

      return 0;
}

    /*
     *  Set a single color register. The values supplied are already
     *  rounded down to the hardware's capabilities (according to the
     *  entries in the var structure). Return != 0 for invalid regno.
     */

static int ps3fb_setcolreg(unsigned int regno, unsigned int red,
                     unsigned int green, unsigned int blue,
                     unsigned int transp, struct fb_info *info)
{
      if (regno >= 16)
            return 1;

      red >>= 8;
      green >>= 8;
      blue >>= 8;
      transp >>= 8;

      ((u32 *)info->pseudo_palette)[regno] = transp << 24 | red << 16 |
                                     green << 8 | blue;
      return 0;
}

static int ps3fb_pan_display(struct fb_var_screeninfo *var,
                       struct fb_info *info)
{
      struct ps3fb_par *par = info->par;

      par->pan_offset = var->yoffset * info->fix.line_length +
                    var->xoffset * BPP;
      return 0;
}

    /*
     *  As we have a virtual frame buffer, we need our own mmap function
     */

static int ps3fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
{
      unsigned long size, offset;

      size = vma->vm_end - vma->vm_start;
      offset = vma->vm_pgoff << PAGE_SHIFT;
      if (offset + size > info->fix.smem_len)
            return -EINVAL;

      offset += info->fix.smem_start;
      if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT,
                      size, vma->vm_page_prot))
            return -EAGAIN;

      dev_dbg(info->device, "ps3fb: mmap framebuffer P(%lx)->V(%lx)\n",
            offset, vma->vm_start);
      return 0;
}

    /*
     * Blank the display
     */

static int ps3fb_blank(int blank, struct fb_info *info)
{
      int retval;

      dev_dbg(info->device, "%s: blank:%d\n", __func__, blank);
      switch (blank) {
      case FB_BLANK_POWERDOWN:
      case FB_BLANK_HSYNC_SUSPEND:
      case FB_BLANK_VSYNC_SUSPEND:
      case FB_BLANK_NORMAL:
            retval = ps3av_video_mute(1); /* mute on */
            if (!retval)
                  ps3fb.is_blanked = 1;
            break;

      default:          /* unblank */
            retval = ps3av_video_mute(0); /* mute off */
            if (!retval)
                  ps3fb.is_blanked = 0;
            break;
      }
      return retval;
}

static int ps3fb_get_vblank(struct fb_vblank *vblank)
{
      memset(vblank, 0, sizeof(*vblank));
      vblank->flags = FB_VBLANK_HAVE_VSYNC;
      return 0;
}

static int ps3fb_wait_for_vsync(u32 crtc)
{
      int ret;
      u64 count;

      count = ps3fb.vblank_count;
      ret = wait_event_interruptible_timeout(ps3fb.wait_vsync,
                                     count != ps3fb.vblank_count,
                                     HZ / 10);
      if (!ret)
            return -ETIMEDOUT;

      return 0;
}

static void ps3fb_flip_ctl(int on, void *data)
{
      struct ps3fb_priv *priv = data;
      if (on)
            atomic_dec_if_positive(&priv->ext_flip);
      else
            atomic_inc(&priv->ext_flip);
}


    /*
     * ioctl
     */

static int ps3fb_ioctl(struct fb_info *info, unsigned int cmd,
                   unsigned long arg)
{
      void __user *argp = (void __user *)arg;
      u32 val;
      int retval = -EFAULT;

      switch (cmd) {
      case FBIOGET_VBLANK:
            {
                  struct fb_vblank vblank;
                  dev_dbg(info->device, "FBIOGET_VBLANK:\n");
                  retval = ps3fb_get_vblank(&vblank);
                  if (retval)
                        break;

                  if (copy_to_user(argp, &vblank, sizeof(vblank)))
                        retval = -EFAULT;
                  break;
            }

      case FBIO_WAITFORVSYNC:
            {
                  u32 crt;
                  dev_dbg(info->device, "FBIO_WAITFORVSYNC:\n");
                  if (get_user(crt, (u32 __user *) arg))
                        break;

                  retval = ps3fb_wait_for_vsync(crt);
                  break;
            }

      case PS3FB_IOCTL_SETMODE:
            {
                  struct ps3fb_par *par = info->par;
                  const struct fb_videomode *mode;
                  struct fb_var_screeninfo var;

                  if (copy_from_user(&val, argp, sizeof(val)))
                        break;

                  if (!(val & PS3AV_MODE_MASK)) {
                        u32 id = ps3av_get_auto_mode();
                        if (id > 0)
                              val = (val & ~PS3AV_MODE_MASK) | id;
                  }
                  dev_dbg(info->device, "PS3FB_IOCTL_SETMODE:%x\n", val);
                  retval = -EINVAL;
                  mode = ps3fb_default_mode(val);
                  if (mode) {
                        var = info->var;
                        fb_videomode_to_var(&var, mode);
                        acquire_console_sem();
                        info->flags |= FBINFO_MISC_USEREVENT;
                        /* Force, in case only special bits changed */
                        var.activate |= FB_ACTIVATE_FORCE;
                        par->new_mode_id = val;
                        retval = fb_set_var(info, &var);
                        info->flags &= ~FBINFO_MISC_USEREVENT;
                        release_console_sem();
                  }
                  break;
            }

      case PS3FB_IOCTL_GETMODE:
            val = ps3av_get_mode();
            dev_dbg(info->device, "PS3FB_IOCTL_GETMODE:%x\n", val);
            if (!copy_to_user(argp, &val, sizeof(val)))
                  retval = 0;
            break;

      case PS3FB_IOCTL_SCREENINFO:
            {
                  struct ps3fb_par *par = info->par;
                  struct ps3fb_ioctl_res res;
                  dev_dbg(info->device, "PS3FB_IOCTL_SCREENINFO:\n");
                  res.xres = info->fix.line_length / BPP;
                  res.yres = info->var.yres_virtual;
                  res.xoff = (res.xres - info->var.xres) / 2;
                  res.yoff = (res.yres - info->var.yres) / 2;
                  res.num_frames = par->num_frames;
                  if (!copy_to_user(argp, &res, sizeof(res)))
                        retval = 0;
                  break;
            }

      case PS3FB_IOCTL_ON:
            dev_dbg(info->device, "PS3FB_IOCTL_ON:\n");
            atomic_inc(&ps3fb.ext_flip);
            retval = 0;
            break;

      case PS3FB_IOCTL_OFF:
            dev_dbg(info->device, "PS3FB_IOCTL_OFF:\n");
            atomic_dec_if_positive(&ps3fb.ext_flip);
            retval = 0;
            break;

      case PS3FB_IOCTL_FSEL:
            if (copy_from_user(&val, argp, sizeof(val)))
                  break;

            dev_dbg(info->device, "PS3FB_IOCTL_FSEL:%d\n", val);
            acquire_console_sem();
            retval = ps3fb_sync(info, val);
            release_console_sem();
            break;

      default:
            retval = -ENOIOCTLCMD;
            break;
      }
      return retval;
}

static int ps3fbd(void *arg)
{
      struct fb_info *info = arg;

      set_freezable();
      while (!kthread_should_stop()) {
            try_to_freeze();
            set_current_state(TASK_INTERRUPTIBLE);
            if (ps3fb.is_kicked) {
                  ps3fb.is_kicked = 0;
                  acquire_console_sem();
                  ps3fb_sync(info, 0);    /* single buffer */
                  release_console_sem();
            }
            schedule();
      }
      return 0;
}

static irqreturn_t ps3fb_vsync_interrupt(int irq, void *ptr)
{
      struct device *dev = ptr;
      u64 v1;
      int status;
      struct display_head *head = &ps3fb.dinfo->display_head[1];

      status = lv1_gpu_context_intr(ps3fb.context_handle, &v1);
      if (status) {
            dev_err(dev, "%s: lv1_gpu_context_intr failed: %d\n", __func__,
                  status);
            return IRQ_NONE;
      }

      if (v1 & (1 << GPU_INTR_STATUS_VSYNC_1)) {
            /* VSYNC */
            ps3fb.vblank_count = head->vblank_count;
            if (ps3fb.task && !ps3fb.is_blanked &&
                !atomic_read(&ps3fb.ext_flip)) {
                  ps3fb.is_kicked = 1;
                  wake_up_process(ps3fb.task);
            }
            wake_up_interruptible(&ps3fb.wait_vsync);
      }

      return IRQ_HANDLED;
}


static int ps3fb_vsync_settings(struct gpu_driver_info *dinfo,
                        struct device *dev)
{
      int error;

      dev_dbg(dev, "version_driver:%x\n", dinfo->version_driver);
      dev_dbg(dev, "irq outlet:%x\n", dinfo->irq.irq_outlet);
      dev_dbg(dev,
            "version_gpu: %x memory_size: %x ch: %x core_freq: %d "
            "mem_freq:%d\n",
            dinfo->version_gpu, dinfo->memory_size, dinfo->hardware_channel,
            dinfo->nvcore_frequency/1000000, dinfo->memory_frequency/1000000);

      if (dinfo->version_driver != GPU_DRIVER_INFO_VERSION) {
            dev_err(dev, "%s: version_driver err:%x\n", __func__,
                  dinfo->version_driver);
            return -EINVAL;
      }

      error = ps3_irq_plug_setup(PS3_BINDING_CPU_ANY, dinfo->irq.irq_outlet,
                           &ps3fb.irq_no);
      if (error) {
            dev_err(dev, "%s: ps3_alloc_irq failed %d\n", __func__, error);
            return error;
      }

      error = request_irq(ps3fb.irq_no, ps3fb_vsync_interrupt, IRQF_DISABLED,
                      DEVICE_NAME, dev);
      if (error) {
            dev_err(dev, "%s: request_irq failed %d\n", __func__, error);
            ps3_irq_plug_destroy(ps3fb.irq_no);
            return error;
      }

      dinfo->irq.mask = (1 << GPU_INTR_STATUS_VSYNC_1) |
                    (1 << GPU_INTR_STATUS_FLIP_1);
      return 0;
}

static int ps3fb_xdr_settings(u64 xdr_lpar, struct device *dev)
{
      int status;

      status = lv1_gpu_context_iomap(ps3fb.context_handle, GPU_IOIF,
                               xdr_lpar, ps3fb_videomemory.size, 0);
      if (status) {
            dev_err(dev, "%s: lv1_gpu_context_iomap failed: %d\n",
                  __func__, status);
            return -ENXIO;
      }
      dev_dbg(dev,
            "video:%p xdr_ea:%p ioif:%lx lpar:%lx phys:%lx size:%lx\n",
            ps3fb_videomemory.address, ps3fb.xdr_ea, GPU_IOIF, xdr_lpar,
            virt_to_abs(ps3fb.xdr_ea), ps3fb_videomemory.size);

      status = lv1_gpu_context_attribute(ps3fb.context_handle,
                                 L1GPU_CONTEXT_ATTRIBUTE_FB_SETUP,
                                 xdr_lpar, GPU_CMD_BUF_SIZE,
                                 GPU_IOIF, 0);
      if (status) {
            dev_err(dev,
                  "%s: lv1_gpu_context_attribute FB_SETUP failed: %d\n",
                  __func__, status);
            return -ENXIO;
      }
      return 0;
}

static struct fb_ops ps3fb_ops = {
      .fb_open    = ps3fb_open,
      .fb_release = ps3fb_release,
      .fb_read        = fb_sys_read,
      .fb_write       = fb_sys_write,
      .fb_check_var     = ps3fb_check_var,
      .fb_set_par = ps3fb_set_par,
      .fb_setcolreg     = ps3fb_setcolreg,
      .fb_pan_display   = ps3fb_pan_display,
      .fb_fillrect      = sys_fillrect,
      .fb_copyarea      = sys_copyarea,
      .fb_imageblit     = sys_imageblit,
      .fb_mmap    = ps3fb_mmap,
      .fb_blank   = ps3fb_blank,
      .fb_ioctl   = ps3fb_ioctl,
      .fb_compat_ioctl = ps3fb_ioctl
};

static struct fb_fix_screeninfo ps3fb_fix __initdata = {
      .id =       DEVICE_NAME,
      .type =           FB_TYPE_PACKED_PIXELS,
      .visual =   FB_VISUAL_TRUECOLOR,
      .accel =    FB_ACCEL_NONE,
};

static int ps3fb_set_sync(struct device *dev)
{
      int status;

#ifdef HEAD_A
      status = lv1_gpu_context_attribute(0x0,
                                 L1GPU_CONTEXT_ATTRIBUTE_DISPLAY_SYNC,
                                 0, L1GPU_DISPLAY_SYNC_VSYNC, 0, 0);
      if (status) {
            dev_err(dev,
                  "%s: lv1_gpu_context_attribute DISPLAY_SYNC failed: "
                  "%d\n",
                  __func__, status);
            return -1;
      }
#endif
#ifdef HEAD_B
      status = lv1_gpu_context_attribute(0x0,
                                 L1GPU_CONTEXT_ATTRIBUTE_DISPLAY_SYNC,
                                 1, L1GPU_DISPLAY_SYNC_VSYNC, 0, 0);

      if (status) {
            dev_err(dev,
                  "%s: lv1_gpu_context_attribute DISPLAY_SYNC failed: "
                  "%d\n",
                  __func__, status);
            return -1;
      }
#endif
      return 0;
}

static int __devinit ps3fb_probe(struct ps3_system_bus_device *dev)
{
      struct fb_info *info;
      struct ps3fb_par *par;
      int retval = -ENOMEM;
      u32 xres, yres;
      u64 ddr_lpar = 0;
      u64 lpar_dma_control = 0;
      u64 lpar_driver_info = 0;
      u64 lpar_reports = 0;
      u64 lpar_reports_size = 0;
      u64 xdr_lpar;
      int status, res_index;
      struct task_struct *task;
      unsigned long max_ps3fb_size;

      if (ps3fb_videomemory.size < GPU_CMD_BUF_SIZE) {
            dev_err(&dev->core, "%s: Not enough video memory\n", __func__);
            return -ENOMEM;
      }

      status = ps3_open_hv_device(dev);
      if (status) {
            dev_err(&dev->core, "%s: ps3_open_hv_device failed\n",
                  __func__);
            goto err;
      }

      if (!ps3fb_mode)
            ps3fb_mode = ps3av_get_mode();
      dev_dbg(&dev->core, "ps3av_mode:%d\n", ps3fb_mode);

      if (ps3fb_mode > 0 &&
          !ps3av_video_mode2res(ps3fb_mode, &xres, &yres)) {
            res_index = ps3fb_get_res_table(xres, yres, ps3fb_mode);
            dev_dbg(&dev->core, "res_index:%d\n", res_index);
      } else
            res_index = GPU_RES_INDEX;

      atomic_set(&ps3fb.f_count, -1);     /* fbcon opens ps3fb */
      atomic_set(&ps3fb.ext_flip, 0);     /* for flip with vsync */
      init_waitqueue_head(&ps3fb.wait_vsync);

      ps3fb_set_sync(&dev->core);

      max_ps3fb_size = _ALIGN_UP(GPU_IOIF, 256*1024*1024) - GPU_IOIF;
      if (ps3fb_videomemory.size > max_ps3fb_size) {
            dev_info(&dev->core, "Limiting ps3fb mem size to %lu bytes\n",
                   max_ps3fb_size);
            ps3fb_videomemory.size = max_ps3fb_size;
      }

      /* get gpu context handle */
      status = lv1_gpu_memory_allocate(ps3fb_videomemory.size, 0, 0, 0, 0,
                               &ps3fb.memory_handle, &ddr_lpar);
      if (status) {
            dev_err(&dev->core, "%s: lv1_gpu_memory_allocate failed: %d\n",
                  __func__, status);
            goto err;
      }
      dev_dbg(&dev->core, "ddr:lpar:0x%lx\n", ddr_lpar);

      status = lv1_gpu_context_allocate(ps3fb.memory_handle, 0,
                                &ps3fb.context_handle,
                                &lpar_dma_control, &lpar_driver_info,
                                &lpar_reports, &lpar_reports_size);
      if (status) {
            dev_err(&dev->core,
                  "%s: lv1_gpu_context_attribute failed: %d\n", __func__,
                  status);
            goto err_gpu_memory_free;
      }

      /* vsync interrupt */
      ps3fb.dinfo = ioremap(lpar_driver_info, 128 * 1024);
      if (!ps3fb.dinfo) {
            dev_err(&dev->core, "%s: ioremap failed\n", __func__);
            goto err_gpu_context_free;
      }

      retval = ps3fb_vsync_settings(ps3fb.dinfo, &dev->core);
      if (retval)
            goto err_iounmap_dinfo;

      /* XDR frame buffer */
      ps3fb.xdr_ea = ps3fb_videomemory.address;
      xdr_lpar = ps3_mm_phys_to_lpar(__pa(ps3fb.xdr_ea));

      /* Clear memory to prevent kernel info leakage into userspace */
      memset(ps3fb.xdr_ea, 0, ps3fb_videomemory.size);

      /*
       * The GPU command buffer is at the start of video memory
       * As we don't use the full command buffer, we can put the actual
       * frame buffer at offset GPU_FB_START and save some precious XDR
       * memory
       */
      ps3fb.xdr_ea += GPU_FB_START;
      ps3fb.xdr_size = ps3fb_videomemory.size - GPU_FB_START;

      retval = ps3fb_xdr_settings(xdr_lpar, &dev->core);
      if (retval)
            goto err_free_irq;

      info = framebuffer_alloc(sizeof(struct ps3fb_par), &dev->core);
      if (!info)
            goto err_free_irq;

      par = info->par;
      par->mode_id = ~ps3fb_mode;   /* != ps3fb_mode, to trigger change */
      par->new_mode_id = ps3fb_mode;
      par->res_index = res_index;
      par->num_frames = 1;

      info->screen_base = (char __iomem *)ps3fb.xdr_ea;
      info->fbops = &ps3fb_ops;

      info->fix = ps3fb_fix;
      info->fix.smem_start = virt_to_abs(ps3fb.xdr_ea);
      info->fix.smem_len = ps3fb.xdr_size;
      info->pseudo_palette = par->pseudo_palette;
      info->flags = FBINFO_DEFAULT | FBINFO_READS_FAST |
                  FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;

      retval = fb_alloc_cmap(&info->cmap, 256, 0);
      if (retval < 0)
            goto err_framebuffer_release;

      if (!fb_find_mode(&info->var, info, mode_option, ps3fb_modedb,
                    ARRAY_SIZE(ps3fb_modedb),
                    ps3fb_default_mode(par->new_mode_id), 32)) {
            retval = -EINVAL;
            goto err_fb_dealloc;
      }

      fb_videomode_to_modelist(ps3fb_modedb, ARRAY_SIZE(ps3fb_modedb),
                         &info->modelist);

      retval = register_framebuffer(info);
      if (retval < 0)
            goto err_fb_dealloc;

      dev->core.driver_data = info;

      dev_info(info->device, "%s %s, using %lu KiB of video memory\n",
             dev_driver_string(info->dev), info->dev->bus_id,
             ps3fb.xdr_size >> 10);

      task = kthread_run(ps3fbd, info, DEVICE_NAME);
      if (IS_ERR(task)) {
            retval = PTR_ERR(task);
            goto err_unregister_framebuffer;
      }

      ps3fb.task = task;
      ps3av_register_flip_ctl(ps3fb_flip_ctl, &ps3fb);

      return 0;

err_unregister_framebuffer:
      unregister_framebuffer(info);
err_fb_dealloc:
      fb_dealloc_cmap(&info->cmap);
err_framebuffer_release:
      framebuffer_release(info);
err_free_irq:
      free_irq(ps3fb.irq_no, &dev->core);
      ps3_irq_plug_destroy(ps3fb.irq_no);
err_iounmap_dinfo:
      iounmap((u8 __iomem *)ps3fb.dinfo);
err_gpu_context_free:
      lv1_gpu_context_free(ps3fb.context_handle);
err_gpu_memory_free:
      lv1_gpu_memory_free(ps3fb.memory_handle);
err:
      return retval;
}

static int ps3fb_shutdown(struct ps3_system_bus_device *dev)
{
      int status;
      struct fb_info *info = dev->core.driver_data;

      dev_dbg(&dev->core, " -> %s:%d\n", __func__, __LINE__);

      ps3fb_flip_ctl(0, &ps3fb);    /* flip off */
      ps3fb.dinfo->irq.mask = 0;

      ps3av_register_flip_ctl(NULL, NULL);
      if (ps3fb.task) {
            struct task_struct *task = ps3fb.task;
            ps3fb.task = NULL;
            kthread_stop(task);
      }
      if (ps3fb.irq_no) {
            free_irq(ps3fb.irq_no, &dev->core);
            ps3_irq_plug_destroy(ps3fb.irq_no);
      }
      if (info) {
            unregister_framebuffer(info);
            fb_dealloc_cmap(&info->cmap);
            framebuffer_release(info);
            info = dev->core.driver_data = NULL;
      }
      iounmap((u8 __iomem *)ps3fb.dinfo);

      status = lv1_gpu_context_free(ps3fb.context_handle);
      if (status)
            dev_dbg(&dev->core, "lv1_gpu_context_free failed: %d\n",
                  status);

      status = lv1_gpu_memory_free(ps3fb.memory_handle);
      if (status)
            dev_dbg(&dev->core, "lv1_gpu_memory_free failed: %d\n",
                  status);

      ps3_close_hv_device(dev);
      dev_dbg(&dev->core, " <- %s:%d\n", __func__, __LINE__);

      return 0;
}

static struct ps3_system_bus_driver ps3fb_driver = {
      .match_id   = PS3_MATCH_ID_GRAPHICS,
      .core.name  = DEVICE_NAME,
      .core.owner = THIS_MODULE,
      .probe            = ps3fb_probe,
      .remove           = ps3fb_shutdown,
      .shutdown   = ps3fb_shutdown,
};

static int __init ps3fb_setup(void)
{
      char *options;

#ifdef MODULE
      return 0;
#endif

      if (fb_get_options(DEVICE_NAME, &options))
            return -ENXIO;

      if (!options || !*options)
            return 0;

      while (1) {
            char *this_opt = strsep(&options, ",");

            if (!this_opt)
                  break;
            if (!*this_opt)
                  continue;
            if (!strncmp(this_opt, "mode:", 5))
                  ps3fb_mode = simple_strtoul(this_opt + 5, NULL, 0);
            else
                  mode_option = this_opt;
      }
      return 0;
}

static int __init ps3fb_init(void)
{
      if (!ps3fb_videomemory.address ||  ps3fb_setup())
            return -ENXIO;

      return ps3_system_bus_driver_register(&ps3fb_driver);
}

static void __exit ps3fb_exit(void)
{
      pr_debug(" -> %s:%d\n", __func__, __LINE__);
      ps3_system_bus_driver_unregister(&ps3fb_driver);
      pr_debug(" <- %s:%d\n", __func__, __LINE__);
}

module_init(ps3fb_init);
module_exit(ps3fb_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("PS3 GPU Frame Buffer Driver");
MODULE_AUTHOR("Sony Computer Entertainment Inc.");
MODULE_ALIAS(PS3_MODULE_ALIAS_GRAPHICS);

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