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📁 ..
📄 drm.h(25.25 KB)
📄 drmP.h(60.47 KB)
📄 drm_agpsupport.c(12.05 KB)
📄 drm_atomic.h(3.48 KB)
📄 drm_auth.c(6.12 KB)
📄 drm_buffer.c(5.02 KB)
📄 drm_buffer.h(4.55 KB)
📄 drm_bufs.c(43.77 KB)
📄 drm_context.c(12.07 KB)
📄 drm_core.h(1.48 KB)
📄 drm_crtc.c(97.29 KB)
📄 drm_crtc.h(38.9 KB)
📄 drm_crtc_helper.c(31.32 KB)
📄 drm_crtc_helper.h(6.37 KB)
📄 drm_dma.c(4.04 KB)
📄 drm_dp_helper.c(4.5 KB)
📄 drm_dp_helper.h(12.35 KB)
📄 drm_dp_iic_helper.c(6.54 KB)
📄 drm_drv.c(17.48 KB)
📄 drm_edid.c(51.99 KB)
📄 drm_edid.h(7.55 KB)
📄 drm_edid_modes.h(33.57 KB)
📄 drm_fb_helper.c(38.84 KB)
📄 drm_fb_helper.h(4.21 KB)
📄 drm_fixed.h(2.23 KB)
📄 drm_fops.c(15.14 KB)
📄 drm_fourcc.h(7.93 KB)
📄 drm_gem.c(11.57 KB)
📄 drm_gem_names.c(5.59 KB)
📄 drm_gem_names.h(2.46 KB)
📄 drm_global.c(3.16 KB)
📄 drm_global.h(2.01 KB)
📄 drm_hashtab.c(4.94 KB)
📄 drm_hashtab.h(2.57 KB)
📄 drm_ioc32.c(21.88 KB)
📄 drm_ioctl.c(8.81 KB)
📄 drm_irq.c(41.03 KB)
📄 drm_linux_list.h(7.88 KB)
📄 drm_linux_list_sort.c(2.53 KB)
📄 drm_lock.c(10.27 KB)
📄 drm_mem_util.h(1.77 KB)
📄 drm_memory.c(3.78 KB)
📄 drm_mm.c(19.2 KB)
📄 drm_mm.h(8.52 KB)
📄 drm_mode.h(12.16 KB)
📄 drm_modes.c(33.66 KB)
📄 drm_os_freebsd.c(11.36 KB)
📄 drm_os_freebsd.h(17.72 KB)
📄 drm_pci.c(12.35 KB)
📄 drm_pciids.h(70.22 KB)
📄 drm_platform.c(4.58 KB)
📄 drm_sarea.h(2.64 KB)
📄 drm_scatter.c(3.58 KB)
📄 drm_stub.c(12.1 KB)
📄 drm_sysctl.c(9.99 KB)
📄 drm_vm.c(4.18 KB)
📁 ttm

Editing: drm_buffer.h

/**************************************************************************
 *
 * Copyright 2010 Pauli Nieminen.
 * 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.
 *
 *
 **************************************************************************/
/*
 * Multipart buffer for coping data which is larger than the page size.
 *
 * Authors:
 * Pauli Nieminen <suokkos-at-gmail-dot-com>
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#ifndef _DRM_BUFFER_H_
#define _DRM_BUFFER_H_

#include <dev/drm2/drmP.h>

struct drm_buffer {
	int iterator;
	int size;
	char *data[];
};

/**
 * Return the index of page that buffer is currently pointing at.
 */
static inline int drm_buffer_page(struct drm_buffer *buf)
{
	return buf->iterator / PAGE_SIZE;
}
/**
 * Return the index of the current byte in the page
 */
static inline int drm_buffer_index(struct drm_buffer *buf)
{
	return buf->iterator & (PAGE_SIZE - 1);
}
/**
 * Return number of bytes that is left to process
 */
static inline int drm_buffer_unprocessed(struct drm_buffer *buf)
{
	return buf->size - buf->iterator;
}

/**
 * Advance the buffer iterator number of bytes that is given.
 */
static inline void drm_buffer_advance(struct drm_buffer *buf, int bytes)
{
	buf->iterator += bytes;
}

/**
 * Allocate the drm buffer object.
 *
 *   buf: A pointer to a pointer where the object is stored.
 *   size: The number of bytes to allocate.
 */
extern int drm_buffer_alloc(struct drm_buffer **buf, int size);

/**
 * Copy the user data to the begin of the buffer and reset the processing
 * iterator.
 *
 *   user_data: A pointer the data that is copied to the buffer.
 *   size: The Number of bytes to copy.
 */
extern int drm_buffer_copy_from_user(struct drm_buffer *buf,
		void __user *user_data, int size);

/**
 * Free the drm buffer object
 */
extern void drm_buffer_free(struct drm_buffer *buf);

/**
 * Read an object from buffer that may be split to multiple parts. If object
 * is not split function just returns the pointer to object in buffer. But in
 * case of split object data is copied to given stack object that is suplied
 * by caller.
 *
 * The processing location of the buffer is also advanced to the next byte
 * after the object.
 *
 *   objsize: The size of the objet in bytes.
 *   stack_obj: A pointer to a memory location where object can be copied.
 */
extern void *drm_buffer_read_object(struct drm_buffer *buf,
		int objsize, void *stack_obj);

/**
 * Returns the pointer to the dword which is offset number of elements from the
 * current processing location.
 *
 * Caller must make sure that dword is not split in the buffer. This
 * requirement is easily met if all the sizes of objects in buffer are
 * multiples of dword and PAGE_SIZE is multiple dword.
 *
 * Call to this function doesn't change the processing location.
 *
 *   offset: The index of the dword relative to the internat iterator.
 */
static inline void *drm_buffer_pointer_to_dword(struct drm_buffer *buffer,
		int offset)
{
	int iter = buffer->iterator + offset * 4;
	return &buffer->data[iter / PAGE_SIZE][iter & (PAGE_SIZE - 1)];
}
/**
 * Returns the pointer to the dword which is offset number of elements from
 * the current processing location.
 *
 * Call to this function doesn't change the processing location.
 *
 *   offset: The index of the byte relative to the internat iterator.
 */
static inline void *drm_buffer_pointer_to_byte(struct drm_buffer *buffer,
		int offset)
{
	int iter = buffer->iterator + offset;
	return &buffer->data[iter / PAGE_SIZE][iter & (PAGE_SIZE - 1)];
}

#endif

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Editing: drm_buffer.h

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