/* sis_ds.c -- Private header for Direct Rendering Manager -*- linux-c -*- * Created: Mon Jan 4 10:05:05 1999 by sclin@sis.com.tw * * Copyright 2000 Silicon Integrated Systems Corp, Inc., HsinChu, Taiwan. * 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, sublicense, * 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 NONINFRINGEMENT. IN NO EVENT SHALL * PRECISION INSIGHT 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: * Sung-Ching Lin * */ #include "drmP.h" #include "drm.h" #include "sis_ds.h" /* Set Data Structure, not check repeated value * temporarily used */ set_t *setInit(void) { int i; set_t *set; set = (set_t *) drm_alloc(sizeof(set_t), DRM_MEM_DRIVER); if (set != NULL) { for (i = 0; i < SET_SIZE; i++) { set->list[i].free_next = i + 1; set->list[i].alloc_next = -1; } set->list[SET_SIZE - 1].free_next = -1; set->free = 0; set->alloc = -1; set->trace = -1; } return set; } int setAdd(set_t * set, ITEM_TYPE item) { int free = set->free; if (free != -1) { set->list[free].val = item; set->free = set->list[free].free_next; } else { return 0; } set->list[free].alloc_next = set->alloc; set->alloc = free; set->list[free].free_next = -1; return 1; } int setDel(set_t * set, ITEM_TYPE item) { int alloc = set->alloc; int prev = -1; while (alloc != -1) { if (set->list[alloc].val == item) { if (prev != -1) set->list[prev].alloc_next = set->list[alloc].alloc_next; else set->alloc = set->list[alloc].alloc_next; break; } prev = alloc; alloc = set->list[alloc].alloc_next; } if (alloc == -1) return 0; set->list[alloc].free_next = set->free; set->free = alloc; set->list[alloc].alloc_next = -1; return 1; } /* setFirst -> setAdd -> setNext is wrong */ int setFirst(set_t * set, ITEM_TYPE * item) { if (set->alloc == -1) return 0; *item = set->list[set->alloc].val; set->trace = set->list[set->alloc].alloc_next; return 1; } int setNext(set_t * set, ITEM_TYPE * item) { if (set->trace == -1) return 0; *item = set->list[set->trace].val; set->trace = set->list[set->trace].alloc_next; return 1; } int setDestroy(set_t * set) { drm_free(set, sizeof(set_t), DRM_MEM_DRIVER); return 1; } /* * GLX Hardware Device Driver common code * Copyright (C) 1999 Wittawat Yamwong * * 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, sublicense, * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL * WITTAWAT YAMWONG, OR ANY OTHER CONTRIBUTORS 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. * */ #define ISFREE(bptr) ((bptr)->free) memHeap_t *mmInit(int ofs, int size) { PMemBlock blocks; if (size <= 0) return NULL; blocks = (TMemBlock *) drm_calloc(1, sizeof(TMemBlock), DRM_MEM_DRIVER); if (blocks != NULL) { blocks->ofs = ofs; blocks->size = size; blocks->free = 1; return (memHeap_t *) blocks; } else return NULL; } /* Checks if a pointer 'b' is part of the heap 'heap' */ int mmBlockInHeap(memHeap_t * heap, PMemBlock b) { TMemBlock *p; if (heap == NULL || b == NULL) return 0; p = heap; while (p != NULL && p != b) { p = p->next; } if (p == b) return 1; else return 0; } static TMemBlock *SliceBlock(TMemBlock * p, int startofs, int size, int reserved, int alignment) { TMemBlock *newblock; /* break left */ if (startofs > p->ofs) { newblock = (TMemBlock *) drm_calloc(1, sizeof(TMemBlock), DRM_MEM_DRIVER); newblock->ofs = startofs; newblock->size = p->size - (startofs - p->ofs); newblock->free = 1; newblock->next = p->next; p->size -= newblock->size; p->next = newblock; p = newblock; } /* break right */ if (size < p->size) { newblock = (TMemBlock *) drm_calloc(1, sizeof(TMemBlock), DRM_MEM_DRIVER); newblock->ofs = startofs + size; newblock->size = p->size - size; newblock->free = 1; newblock->next = p->next; p->size = size; p->next = newblock; } /* p = middle block */ p->align = alignment; p->free = 0; p->reserved = reserved; return p; } PMemBlock mmAllocMem(memHeap_t * heap, int size, int align2, int startSearch) { int mask, startofs, endofs; TMemBlock *p; if (heap == NULL || align2 < 0 || size <= 0) return NULL; mask = (1 << align2) - 1; startofs = 0; p = (TMemBlock *) heap; while (p != NULL) { if (ISFREE(p)) { startofs = (p->ofs + mask) & ~mask; if (startofs < startSearch) { startofs = startSearch; } endofs = startofs + size; if (endofs <= (p->ofs + p->size)) break; } p = p->next; } if (p == NULL) return NULL; p = SliceBlock(p, startofs, size, 0, mask + 1); p->heap = heap; return p; } static __inline__ int Join2Blocks(TMemBlock * p) { if (p->free && p->next && p->next->free) { TMemBlock *q = p->next; p->size += q->size; p->next = q->next; drm_free(q, sizeof(TMemBlock), DRM_MEM_DRIVER); return 1; } return 0; } int mmFreeMem(PMemBlock b) { TMemBlock *p, *prev; if (b == NULL) return 0; if (b->heap == NULL) return -1; p = b->heap; prev = NULL; while (p != NULL && p != b) { prev = p; p = p->next; } if (p == NULL || p->free || p->reserved) return -1; p->free = 1; Join2Blocks(p); if (prev) Join2Blocks(prev); return 0; } >128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
/*
 * drm_sysfs.c - Modifications to drm_sysfs_class.c to support 
 *               extra sysfs attribute from DRM. Normal drm_sysfs_class
 *               does not allow adding attributes.
 *
 * Copyright (c) 2004 Jon Smirl <jonsmirl@gmail.com>
 * Copyright (c) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
 * Copyright (c) 2003-2004 IBM Corp.
 *
 * This file is released under the GPLv2
 *
 */

#include <linux/config.h>
#include <linux/device.h>
#include <linux/kdev_t.h>
#include <linux/err.h>

struct drm_sysfs_class {
	struct class_device_attribute attr;
	struct class class;
};
#define to_drm_sysfs_class(d) container_of(d, struct drm_sysfs_class, class)

struct simple_dev {
	struct list_head node;
	dev_t dev;
	struct class_device class_dev;
};
#define to_simple_dev(d) container_of(d, struct simple_dev, class_dev)

static LIST_HEAD(simple_dev_list);
static spinlock_t simple_dev_list_lock = SPIN_LOCK_UNLOCKED;

static void release_simple_dev(struct class_device *class_dev)
{
	struct simple_dev *s_dev = to_simple_dev(class_dev);
	kfree(s_dev);
}

static ssize_t show_dev(struct class_device *class_dev, char *buf)
{
	struct simple_dev *s_dev = to_simple_dev(class_dev);
	return print_dev_t(buf, s_dev->dev);
}

static void drm_sysfs_class_release(struct class *class)
{
	struct drm_sysfs_class *cs = to_drm_sysfs_class(class);
	kfree(cs);
}

/* Display the version of drm_core. This doesn't work right in current design */
static ssize_t version_show(struct class *dev, char *buf)
{
	return sprintf(buf, "fixme for drm_core %s %d.%d.%d %s\n", DRIVER_NAME, DRIVER_MAJOR, 
				DRIVER_MINOR, DRIVER_PATCHLEVEL, DRIVER_DATE);
}
static CLASS_ATTR(version, S_IRUGO, version_show, NULL);

/**
 * DRM(sysfs_create) - create a struct drm_sysfs_class structure
 * @owner: pointer to the module that is to "own" this struct drm_sysfs_class
 * @name: pointer to a string for the name of this class.
 *
 * This is used to create a struct drm_sysfs_class pointer that can then be used
 * in calls to DRM(sysfs_device_add)().
 *
 * Note, the pointer created here is to be destroyed when finished by making a
 * call to DRM(sysfs_destroy)().
 */
struct drm_sysfs_class *DRM(sysfs_create)(struct module *owner, char *name)
{
	struct drm_sysfs_class *cs;
	int retval;

	cs = kmalloc(sizeof(*cs), GFP_KERNEL);
	if (!cs) {
		retval = -ENOMEM;
		goto error;
	}
	memset(cs, 0x00, sizeof(*cs));

	cs->class.name = name;
	cs->class.class_release = drm_sysfs_class_release;
	cs->class.release = release_simple_dev;

	cs->attr.attr.name = "dev";
	cs->attr.attr.mode = S_IRUGO;
	cs->attr.attr.owner = owner;
	cs->attr.show = show_dev;
	cs->attr.store = NULL;

	retval = class_register(&cs->class);
	if (retval)
		goto error;
	class_create_file(&cs->class, &class_attr_version);

	return cs;

error:
	kfree(cs);
	return ERR_PTR(retval);
}

/**
 * DRM(sysfs_destroy) - destroys a struct drm_sysfs_class structure
 * @cs: pointer to the struct drm_sysfs_class that is to be destroyed
 *
 * Note, the pointer to be destroyed must have been created with a call to
 * DRM(sysfs_create)().
 */
void DRM(sysfs_destroy)(struct drm_sysfs_class *cs)
{
	if ((cs == NULL) || (IS_ERR(cs)))
		return;

	class_unregister(&cs->class);
}

/**
 * DRM(sysfs_device_add) - adds a class device to sysfs for a character driver
 * @cs: pointer to the struct drm_sysfs_class that this device should be registered to.
 * @dev: the dev_t for the device to be added.
 * @device: a pointer to a struct device that is assiociated with this class device.
 * @fmt: string for the class device's name
 *
 * A struct class_device will be created in sysfs, registered to the specified 
 * class.  A "dev" file will be created, showing the dev_t for the device.  The 
 * pointer to the struct class_device will be returned from the call.  Any further
 * sysfs files that might be required can be created using this pointer.
 * Note: the struct drm_sysfs_class passed to this function must have previously been
 * created with a call to DRM(sysfs_create)().
 */
struct class_device *DRM(sysfs_device_add)(struct drm_sysfs_class *cs, dev_t dev, struct device *device, const char *fmt, ...)
{
	va_list args;
	struct simple_dev *s_dev = NULL;
	int retval;

	if ((cs == NULL) || (IS_ERR(cs))) {
		retval = -ENODEV;
		goto error;
	}

	s_dev = kmalloc(sizeof(*s_dev), GFP_KERNEL);
	if (!s_dev) {
		retval = -ENOMEM;
		goto error;
	}
	memset(s_dev, 0x00, sizeof(*s_dev));

	s_dev->dev = dev;
	s_dev->class_dev.dev = device;
	s_dev->class_dev.class = &cs->class;

	va_start(args, fmt);
	vsnprintf(s_dev->class_dev.class_id, BUS_ID_SIZE, fmt, args);
	va_end(args);
	retval = class_device_register(&s_dev->class_dev);
	if (retval)
		goto error;

	class_device_create_file(&s_dev->class_dev, &cs->attr);

	spin_lock(&simple_dev_list_lock);
	list_add(&s_dev->node, &simple_dev_list);
	spin_unlock(&simple_dev_list_lock);

	return &s_dev->class_dev;

error:
	kfree(s_dev);
	return ERR_PTR(retval);
}

/**
 * DRM(sysfs_device_remove) - removes a class device that was created with DRM(sysfs_device_add)()
 * @dev: the dev_t of the device that was previously registered.
 *
 * This call unregisters and cleans up a class device that was created with a
 * call to DRM(sysfs_device_add)()
 */
void DRM(sysfs_device_remove)(dev_t dev)
{
	struct simple_dev *s_dev = NULL;
	int found = 0;

	spin_lock(&simple_dev_list_lock);
	list_for_each_entry(s_dev, &simple_dev_list, node) {
		if (s_dev->dev == dev) {
			found = 1;
			break;
		}
	}
	if (found) {
		list_del(&s_dev->node);
		spin_unlock(&simple_dev_list_lock);
		class_device_unregister(&s_dev->class_dev);
	} else {
		spin_unlock(&simple_dev_list_lock);
	}
}

#endif
generated by cgit v1.2.3 (git 2.25.1) at 2025-12-13 09:03:34 +0000