diff options
| -rw-r--r-- | drivers/char/drm/drm_drawable.c | 262 |
1 files changed, 155 insertions, 107 deletions
diff --git a/drivers/char/drm/drm_drawable.c b/drivers/char/drm/drm_drawable.c index e5f97def26bf..5580c5731eb8 100644 --- a/drivers/char/drm/drm_drawable.c +++ b/drivers/char/drm/drm_drawable.c @@ -12,6 +12,7 @@ * * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. + * Copyright 2006 Tungsten Graphics, Inc., Bismarck, North Dakota. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a @@ -36,70 +37,86 @@ #include "drmP.h" -/** No-op. */ +/** + * Allocate drawable ID and memory to store information about it. + */ int drm_adddraw(DRM_IOCTL_ARGS) { DRM_DEVICE; unsigned long irqflags; - int i, j = 0; + int i, j; + u32 *bitfield = dev->drw_bitfield; + unsigned int bitfield_length = dev->drw_bitfield_length; + drm_drawable_info_t **info = dev->drw_info; + unsigned int info_length = dev->drw_info_length; drm_draw_t draw; - spin_lock_irqsave(&dev->drw_lock, irqflags); - - for (i = 0; i < dev->drw_bitfield_length; i++) { - u32 bitfield = dev->drw_bitfield[i]; - - if (bitfield == ~0) + for (i = 0, j = 0; i < bitfield_length; i++) { + if (bitfield[i] == ~0) continue; - for (; j < sizeof(bitfield); j++) - if (!(bitfield & (1 << j))) + for (; j < 8 * sizeof(*bitfield); j++) + if (!(bitfield[i] & (1 << j))) goto done; } done: - if (i == dev->drw_bitfield_length) { - u32 *new_bitfield = drm_realloc(dev->drw_bitfield, i * 4, - (i + 1) * 4, DRM_MEM_BUFS); + if (i == bitfield_length) { + bitfield_length++; + + bitfield = drm_alloc(bitfield_length * sizeof(*bitfield), + DRM_MEM_BUFS); - if (!new_bitfield) { + if (!bitfield) { DRM_ERROR("Failed to allocate new drawable bitfield\n"); - spin_unlock_irqrestore(&dev->drw_lock, irqflags); return DRM_ERR(ENOMEM); } - if (32 * (i + 1) > dev->drw_info_length) { - void *new_info = drm_realloc(dev->drw_info, - dev->drw_info_length * - sizeof(drm_drawable_info_t*), - 32 * (i + 1) * - sizeof(drm_drawable_info_t*), - DRM_MEM_BUFS); + if (8 * sizeof(*bitfield) * bitfield_length > info_length) { + info_length += 8 * sizeof(*bitfield); - if (!new_info) { + info = drm_alloc(info_length * sizeof(*info), + DRM_MEM_BUFS); + + if (!info) { DRM_ERROR("Failed to allocate new drawable info" " array\n"); - drm_free(new_bitfield, (i + 1) * 4, DRM_MEM_BUFS); - spin_unlock_irqrestore(&dev->drw_lock, irqflags); + drm_free(bitfield, + bitfield_length * sizeof(*bitfield), + DRM_MEM_BUFS); return DRM_ERR(ENOMEM); } - - dev->drw_info = (drm_drawable_info_t**)new_info; } - new_bitfield[i] = 0; - - dev->drw_bitfield = new_bitfield; - dev->drw_bitfield_length++; + bitfield[i] = 0; } - dev->drw_bitfield[i] |= 1 << j; - - draw.handle = i * sizeof(u32) + j; + draw.handle = i * 8 * sizeof(*bitfield) + j; DRM_DEBUG("%d\n", draw.handle); - dev->drw_info[draw.handle] = NULL; + spin_lock_irqsave(&dev->drw_lock, irqflags); + + bitfield[i] |= 1 << j; + info[draw.handle] = NULL; + + if (bitfield != dev->drw_bitfield) { + memcpy(bitfield, dev->drw_bitfield, dev->drw_bitfield_length * + sizeof(*bitfield)); + drm_free(dev->drw_bitfield, sizeof(*bitfield) * + dev->drw_bitfield_length, DRM_MEM_BUFS); + dev->drw_bitfield = bitfield; + dev->drw_bitfield_length = bitfield_length; + } + + if (info != dev->drw_info) { + memcpy(info, dev->drw_info, dev->drw_info_length * + sizeof(*info)); + drm_free(dev->drw_info, sizeof(*info) * dev->drw_info_length, + DRM_MEM_BUFS); + dev->drw_info = info; + dev->drw_info_length = info_length; + } spin_unlock_irqrestore(&dev->drw_lock, irqflags); @@ -108,63 +125,85 @@ done: return 0; } -/** No-op. */ +/** + * Free drawable ID and memory to store information about it. + */ int drm_rmdraw(DRM_IOCTL_ARGS) { DRM_DEVICE; drm_draw_t draw; - unsigned int idx, mod; + unsigned int idx, shift; unsigned long irqflags; + u32 *bitfield = dev->drw_bitfield; + unsigned int bitfield_length = dev->drw_bitfield_length; + drm_drawable_info_t **info = dev->drw_info; + unsigned int info_length = dev->drw_info_length; DRM_COPY_FROM_USER_IOCTL(draw, (drm_draw_t __user *) data, sizeof(draw)); - idx = draw.handle / 32; - mod = draw.handle % 32; + idx = draw.handle / (8 * sizeof(*bitfield)); + shift = draw.handle % (8 * sizeof(*bitfield)); - spin_lock_irqsave(&dev->drw_lock, irqflags); - - if (idx >= dev->drw_bitfield_length || - !(dev->drw_bitfield[idx] & (1 << mod))) { + if (idx >= bitfield_length || + !(bitfield[idx] & (1 << shift))) { DRM_DEBUG("No such drawable %d\n", draw.handle); - spin_unlock_irqrestore(&dev->drw_lock, irqflags); return 0; } - dev->drw_bitfield[idx] &= ~(1 << mod); + spin_lock_irqsave(&dev->drw_lock, irqflags); + + bitfield[idx] &= ~(1 << shift); + + spin_unlock_irqrestore(&dev->drw_lock, irqflags); - if (idx == (dev->drw_bitfield_length - 1)) { - while (idx >= 0 && !dev->drw_bitfield[idx]) + /* Can we shrink the arrays? */ + if (idx == bitfield_length - 1) { + while (idx >= 0 && !bitfield[idx]) --idx; - if (idx != draw.handle / 32) { - u32 *new_bitfield = drm_realloc(dev->drw_bitfield, - dev->drw_bitfield_length * 4, - (idx + 1) * 4, - DRM_MEM_BUFS); + bitfield_length = idx + 1; - if (new_bitfield || idx == -1) { - dev->drw_bitfield = new_bitfield; - dev->drw_bitfield_length = idx + 1; - } + if (idx != draw.handle / (8 * sizeof(*bitfield))) + bitfield = drm_alloc(bitfield_length * + sizeof(*bitfield), DRM_MEM_BUFS); + + if (!bitfield && bitfield_length) { + bitfield = dev->drw_bitfield; + bitfield_length = dev->drw_bitfield_length; } } - if (32 * dev->drw_bitfield_length < dev->drw_info_length) { - void *new_info = drm_realloc(dev->drw_info, - dev->drw_info_length * - sizeof(drm_drawable_info_t*), - 32 * dev->drw_bitfield_length * - sizeof(drm_drawable_info_t*), - DRM_MEM_BUFS); - - if (new_info || !dev->drw_bitfield_length) { - dev->drw_info = (drm_drawable_info_t**)new_info; - dev->drw_info_length = 32 * dev->drw_bitfield_length; + if (bitfield != dev->drw_bitfield) { + info_length = 8 * sizeof(*bitfield) * bitfield_length; + + info = drm_alloc(info_length * sizeof(*info), DRM_MEM_BUFS); + + if (!info && info_length) { + info = dev->drw_info; + info_length = dev->drw_info_length; } - } - spin_unlock_irqrestore(&dev->drw_lock, irqflags); + spin_lock_irqsave(&dev->drw_lock, irqflags); + + memcpy(bitfield, dev->drw_bitfield, bitfield_length * + sizeof(*bitfield)); + drm_free(dev->drw_bitfield, sizeof(*bitfield) * + dev->drw_bitfield_length, DRM_MEM_BUFS); + dev->drw_bitfield = bitfield; + dev->drw_bitfield_length = bitfield_length; + + if (info != dev->drw_info) { + memcpy(info, dev->drw_info, info_length * + sizeof(*info)); + drm_free(dev->drw_info, sizeof(*info) * + dev->drw_info_length, DRM_MEM_BUFS); + dev->drw_info = info; + dev->drw_info_length = info_length; + } + + spin_unlock_irqrestore(&dev->drw_lock, irqflags); + } DRM_DEBUG("%d\n", draw.handle); return 0; @@ -173,24 +212,22 @@ int drm_rmdraw(DRM_IOCTL_ARGS) int drm_update_drawable_info(DRM_IOCTL_ARGS) { DRM_DEVICE; drm_update_draw_t update; - unsigned int id, idx, mod; - unsigned long irqflags; + unsigned int id, idx, shift; + u32 *bitfield = dev->drw_bitfield; + unsigned long irqflags, bitfield_length = dev->drw_bitfield_length; drm_drawable_info_t *info; - void *new_data; + drm_clip_rect_t *rects; + int err; DRM_COPY_FROM_USER_IOCTL(update, (drm_update_draw_t __user *) data, sizeof(update)); id = update.handle; - idx = id / 32; - mod = id % 32; + idx = id / (8 * sizeof(*bitfield)); + shift = id % (8 * sizeof(*bitfield)); - spin_lock_irqsave(&dev->drw_lock, irqflags); - - if (idx >= dev->drw_bitfield_length || - !(dev->drw_bitfield[idx] & (1 << mod))) { + if (idx >= bitfield_length || !(bitfield[idx] & (1 << shift))) { DRM_ERROR("No such drawable %d\n", update.handle); - spin_unlock_irqrestore(&dev->drw_lock, irqflags); return DRM_ERR(EINVAL); } @@ -201,66 +238,77 @@ int drm_update_drawable_info(DRM_IOCTL_ARGS) { if (!info) { DRM_ERROR("Failed to allocate drawable info memory\n"); - spin_unlock_irqrestore(&dev->drw_lock, irqflags); return DRM_ERR(ENOMEM); } - - dev->drw_info[id] = info; } switch (update.type) { case DRM_DRAWABLE_CLIPRECTS: if (update.num != info->num_rects) { - new_data = drm_alloc(update.num * - sizeof(drm_clip_rect_t), - DRM_MEM_BUFS); - - if (!new_data) { - DRM_ERROR("Can't allocate cliprect memory\n"); - spin_unlock_irqrestore(&dev->drw_lock, irqflags); - return DRM_ERR(ENOMEM); - } - - info->rects = new_data; + rects = drm_alloc(update.num * sizeof(drm_clip_rect_t), + DRM_MEM_BUFS); + } else + rects = info->rects; + + if (update.num && !rects) { + DRM_ERROR("Failed to allocate cliprect memory\n"); + err = DRM_ERR(ENOMEM); + goto error; } - if (DRM_COPY_FROM_USER(info->rects, - (drm_clip_rect_t __user *) - (unsigned long)update.data, - update.num * sizeof(drm_clip_rect_t))) { - DRM_ERROR("Can't copy cliprects from userspace\n"); - spin_unlock_irqrestore(&dev->drw_lock, irqflags); - return DRM_ERR(EFAULT); + if (update.num && DRM_COPY_FROM_USER(rects, + (drm_clip_rect_t __user *) + (unsigned long)update.data, + update.num * + sizeof(*rects))) { + DRM_ERROR("Failed to copy cliprects from userspace\n"); + err = DRM_ERR(EFAULT); + goto error; } - if (update.num != info->num_rects) { + spin_lock_irqsave(&dev->drw_lock, irqflags); + + if (rects != info->rects) { drm_free(info->rects, info->num_rects * sizeof(drm_clip_rect_t), DRM_MEM_BUFS); - info->num_rects = update.num; } + info->rects = rects; + info->num_rects = update.num; + dev->drw_info[id] = info; + + spin_unlock_irqrestore(&dev->drw_lock, irqflags); + DRM_DEBUG("Updated %d cliprects for drawable %d\n", info->num_rects, id); break; default: DRM_ERROR("Invalid update type %d\n", update.type); - spin_unlock_irqrestore(&dev->drw_lock, irqflags); return DRM_ERR(EINVAL); } - spin_unlock_irqrestore(&dev->drw_lock, irqflags); - return 0; + +error: + if (!dev->drw_info[id]) + drm_free(info, sizeof(*info), DRM_MEM_BUFS); + else if (rects != dev->drw_info[id]->rects) + drm_free(rects, update.num * + sizeof(drm_clip_rect_t), DRM_MEM_BUFS); + + return err; } /** * Caller must hold the drawable spinlock! */ drm_drawable_info_t *drm_get_drawable_info(drm_device_t *dev, drm_drawable_t id) { - unsigned int idx = id / 32, mod = id % 32; + u32 *bitfield = dev->drw_bitfield; + unsigned int idx = id / (8 * sizeof(*bitfield)); + unsigned int shift = id % (8 * sizeof(*bitfield)); if (idx >= dev->drw_bitfield_length || - !(dev->drw_bitfield[idx] & (1 << mod))) { + !(bitfield[idx] & (1 << shift))) { DRM_DEBUG("No such drawable %d\n", id); return NULL; } |