cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/sis/sis_mm.c

/**************************************************************************
 *
 * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 *
 **************************************************************************/

/*
 * Authors:
 *    Thomas Hellström <thomas-at-tungstengraphics-dot-com>
 */

#include <drm/drmP.h>
#include <drm/sis_drm.h>
#include "sis_drv.h"

#include <video/sisfb.h>


#define VIDEO_TYPE 0

#define AGP_TYPE 1



struct sis_memblock {
	
struct drm_mm_node mm_node;
	
struct sis_memreq req;
	
struct list_head owner_list;
};

#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
/* fb management via fb device */


#define SIS_MM_ALIGN_SHIFT 0

#define SIS_MM_ALIGN_MASK 0

#else /* CONFIG_FB_SIS[_MODULE] */


#define SIS_MM_ALIGN_SHIFT 4

#define SIS_MM_ALIGN_MASK ((1 << SIS_MM_ALIGN_SHIFT) - 1)

#endif /* CONFIG_FB_SIS[_MODULE] */


static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_sis_private_t *dev_priv = dev->dev_private; drm_sis_fb_t *fb = data; mutex_lock(&dev->struct_mutex); /* Unconditionally init the drm_mm, even though we don't use it when the * fb sis driver is available - make cleanup easier. */ drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> SIS_MM_ALIGN_SHIFT); dev_priv->vram_initialized = 1; dev_priv->vram_offset = fb->offset; mutex_unlock(&dev->struct_mutex); DRM_DEBUG("offset = %lu, size = %lu\n", fb->offset, fb->size); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Hellstrom3940.21%111.11%
Linus Torvalds2929.90%222.22%
Eric Anholt2020.62%111.11%
Daniel Vetter44.12%222.22%
Dave Airlie44.12%222.22%
Andrew Morton11.03%111.11%
Total97100.00%9100.00%


static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file, void *data, int pool) { drm_sis_private_t *dev_priv = dev->dev_private; drm_sis_mem_t *mem = data; int retval = 0, user_key; struct sis_memblock *item; struct sis_file_private *file_priv = file->driver_priv; unsigned long offset; mutex_lock(&dev->struct_mutex); if (0 == ((pool == 0) ? dev_priv->vram_initialized : dev_priv->agp_initialized)) { DRM_ERROR ("Attempt to allocate from uninitialized memory manager.\n"); mutex_unlock(&dev->struct_mutex); return -EINVAL; } item = kzalloc(sizeof(*item), GFP_KERNEL); if (!item) { retval = -ENOMEM; goto fail_alloc; } mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT; if (pool == AGP_TYPE) { retval = drm_mm_insert_node(&dev_priv->agp_mm, &item->mm_node, mem->size); offset = item->mm_node.start; } else { #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE) item->req.size = mem->size; sis_malloc(&item->req); if (item->req.size == 0) retval = -ENOMEM; offset = item->req.offset; #else retval = drm_mm_insert_node(&dev_priv->vram_mm, &item->mm_node, mem->size); offset = item->mm_node.start; #endif } if (retval) goto fail_alloc; retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL); if (retval < 0) goto fail_idr; user_key = retval; list_add(&item->owner_list, &file_priv->obj_list); mutex_unlock(&dev->struct_mutex); mem->offset = ((pool == 0) ? dev_priv->vram_offset : dev_priv->agp_offset) + (offset << SIS_MM_ALIGN_SHIFT); mem->free = user_key; mem->size = mem->size << SIS_MM_ALIGN_SHIFT; return 0; fail_idr: drm_mm_remove_node(&item->mm_node); fail_alloc: kfree(item); mutex_unlock(&dev->struct_mutex); mem->offset = 0; mem->size = 0; mem->free = 0; DRM_DEBUG("alloc %d, size = %ld, offset = %ld\n", pool, mem->size, mem->offset); return retval; }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Vetter22952.40%531.25%
Thomas Hellstrom14633.41%16.25%
Linus Torvalds214.81%212.50%
Eric Anholt163.66%212.50%
Tejun Heo102.29%16.25%
Roel Kluin81.83%16.25%
Dave Airlie61.37%318.75%
Andrew Morton10.23%16.25%
Total437100.00%16100.00%


static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_sis_private_t *dev_priv = dev->dev_private; drm_sis_mem_t *mem = data; struct sis_memblock *obj; mutex_lock(&dev->struct_mutex); obj = idr_find(&dev_priv->object_idr, mem->free); if (obj == NULL) { mutex_unlock(&dev->struct_mutex); return -EINVAL; } idr_remove(&dev_priv->object_idr, mem->free); list_del(&obj->owner_list); if (drm_mm_node_allocated(&obj->mm_node)) drm_mm_remove_node(&obj->mm_node); #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE) else sis_free(obj->req.offset); #endif kfree(obj); mutex_unlock(&dev->struct_mutex); DRM_DEBUG("free = 0x%lx\n", mem->free); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Vetter9556.89%342.86%
Linus Torvalds3118.56%114.29%
Thomas Hellstrom2213.17%114.29%
Eric Anholt1810.78%114.29%
Dave Airlie10.60%114.29%
Total167100.00%7100.00%


static int sis_fb_alloc(struct drm_device *dev, void *data, struct drm_file *file_priv) { return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE); }

Contributors

PersonTokensPropCommitsCommitProp
Eric Anholt1443.75%233.33%
Thomas Hellstrom1237.50%116.67%
Linus Torvalds515.62%233.33%
Dave Airlie13.12%116.67%
Total32100.00%6100.00%


static int sis_ioctl_agp_init(struct drm_device *dev, void *data, struct drm_file *file_priv) { drm_sis_private_t *dev_priv = dev->dev_private; drm_sis_agp_t *agp = data; dev_priv = dev->dev_private; mutex_lock(&dev->struct_mutex); drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT); dev_priv->agp_initialized = 1; dev_priv->agp_offset = agp->offset; mutex_unlock(&dev->struct_mutex); DRM_DEBUG("offset = %lu, size = %lu\n", agp->offset, agp->size); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Hellstrom4443.14%114.29%
Linus Torvalds3433.33%228.57%
Eric Anholt2019.61%114.29%
Daniel Vetter32.94%228.57%
Andrew Morton10.98%114.29%
Total102100.00%7100.00%


static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data, struct drm_file *file_priv) { return sis_drm_alloc(dev, file_priv, data, AGP_TYPE); }

Contributors

PersonTokensPropCommitsCommitProp
Eric Anholt1443.75%240.00%
Thomas Hellstrom1340.62%120.00%
Linus Torvalds412.50%120.00%
Dave Airlie13.12%120.00%
Total32100.00%5100.00%


static drm_local_map_t *sis_reg_init(struct drm_device *dev) { struct drm_map_list *entry; drm_local_map_t *map; list_for_each_entry(entry, &dev->maplist, head) { map = entry->map; if (!map) continue; if (map->type == _DRM_REGISTERS) return map; } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Hellstrom5291.23%125.00%
Dave Airlie58.77%375.00%
Total57100.00%4100.00%


int sis_idle(struct drm_device *dev) { drm_sis_private_t *dev_priv = dev->dev_private; uint32_t idle_reg; unsigned long end; int i; if (dev_priv->idle_fault) return 0; if (dev_priv->mmio == NULL) { dev_priv->mmio = sis_reg_init(dev); if (dev_priv->mmio == NULL) { DRM_ERROR("Could not find register map.\n"); return 0; } } /* * Implement a device switch here if needed */ if (dev_priv->chipset != SIS_CHIP_315) return 0; /* * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here * because its polling frequency is too low. */ end = jiffies + (HZ * 3); for (i = 0; i < 4; ++i) { do { idle_reg = SIS_READ(0x85cc); } while (!time_after_eq(jiffies, end) && ((idle_reg & 0x80000000) != 0x80000000)); } if (time_after_eq(jiffies, end)) { DRM_ERROR("Graphics engine idle timeout. " "Disabling idle check\n"); dev_priv->idle_fault = 1; } /* * The caller never sees an error code. It gets trapped * in libdrm. */ return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Hellstrom16697.65%125.00%
Dave Airlie21.18%125.00%
Daniel Vetter10.59%125.00%
Andrew Morton10.59%125.00%
Total170100.00%4100.00%


void sis_lastclose(struct drm_device *dev) { drm_sis_private_t *dev_priv = dev->dev_private; if (!dev_priv) return; mutex_lock(&dev->struct_mutex); if (dev_priv->vram_initialized) { drm_mm_takedown(&dev_priv->vram_mm); dev_priv->vram_initialized = 0; } if (dev_priv->agp_initialized) { drm_mm_takedown(&dev_priv->agp_mm); dev_priv->agp_initialized = 0; } dev_priv->mmio = NULL; mutex_unlock(&dev->struct_mutex); }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Hellstrom4550.00%240.00%
Daniel Vetter2628.89%120.00%
Linus Torvalds1718.89%120.00%
Andrew Morton22.22%120.00%
Total90100.00%5100.00%


void sis_reclaim_buffers_locked(struct drm_device *dev, struct drm_file *file) { struct sis_file_private *file_priv = file->driver_priv; struct sis_memblock *entry, *next; if (!(dev->master && file->master->lock.hw_lock)) return; drm_legacy_idlelock_take(&file->master->lock); mutex_lock(&dev->struct_mutex); if (list_empty(&file_priv->obj_list)) { mutex_unlock(&dev->struct_mutex); drm_legacy_idlelock_release(&file->master->lock); return; } sis_idle(dev); list_for_each_entry_safe(entry, next, &file_priv->obj_list, owner_list) { list_del(&entry->owner_list); if (drm_mm_node_allocated(&entry->mm_node)) drm_mm_remove_node(&entry->mm_node); #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE) else sis_free(entry->req.offset); #endif kfree(entry); } mutex_unlock(&dev->struct_mutex); drm_legacy_idlelock_release(&file->master->lock); return; }

Contributors

PersonTokensPropCommitsCommitProp
Daniel Vetter12566.14%440.00%
Thomas Hellstrom3719.58%110.00%
Linus Torvalds2010.58%220.00%
David Herrmann31.59%110.00%
Eric Anholt21.06%110.00%
Dave Airlie21.06%110.00%
Total189100.00%10100.00%

const struct drm_ioctl_desc sis_ioctls[] = { DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH), DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH), DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH), DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH), DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY), }; int sis_max_ioctl = ARRAY_SIZE(sis_ioctls);

Overall Contributors

PersonTokensPropCommitsCommitProp
Thomas Hellstrom59438.98%25.71%
Daniel Vetter50032.81%925.71%
Linus Torvalds18111.88%25.71%
Eric Anholt1258.20%38.57%
Dave Airlie754.92%822.86%
Tejun Heo100.66%12.86%
David Howells90.59%25.71%
Adrian Bunk90.59%12.86%
Roel Kluin80.52%12.86%
Andrew Morton60.39%12.86%
David Herrmann30.20%12.86%
Nicolas Kaiser10.07%12.86%
Damien Lespiau10.07%12.86%
Rob Clark10.07%12.86%
Jan Engelhardt10.07%12.86%
Total1524100.00%35100.00%
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