File Manager

003 File Manager

Current Path: /usr/src/sys/dev/drm2

📁 ..
📄 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.c

/**************************************************************************
 *
 * 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("$FreeBSD$");

#include <dev/drm2/drm_buffer.h>

/**
 * Allocate the drm buffer object.
 *
 *   buf: Pointer to a pointer where the object is stored.
 *   size: The number of bytes to allocate.
 */
int drm_buffer_alloc(struct drm_buffer **buf, int size)
{
	int nr_pages = size / PAGE_SIZE + 1;
	int idx;

/* Allocating pointer table to end of structure makes drm_buffer
	 * variable sized */
	*buf = malloc(sizeof(struct drm_buffer) + nr_pages*sizeof(char *),
			DRM_MEM_DRIVER, M_ZERO | M_WAITOK);

if (*buf == NULL) {
		DRM_ERROR("Failed to allocate drm buffer object to hold"
				" %d bytes in %d pages.\n",
				size, nr_pages);
		return -ENOMEM;
	}

(*buf)->size = size;

for (idx = 0; idx < nr_pages; ++idx) {

(*buf)->data[idx] =
			malloc(min(PAGE_SIZE, size - idx * PAGE_SIZE),
				DRM_MEM_DRIVER, M_WAITOK);

if ((*buf)->data[idx] == NULL) {
			DRM_ERROR("Failed to allocate %dth page for drm"
					" buffer with %d bytes and %d pages.\n",
					idx + 1, size, nr_pages);
			goto error_out;
		}

}

return 0;

error_out:

/* Only last element can be null pointer so check for it first. */
	if ((*buf)->data[idx])
		free((*buf)->data[idx], DRM_MEM_DRIVER);

for (--idx; idx >= 0; --idx)
		free((*buf)->data[idx], DRM_MEM_DRIVER);

free(*buf, DRM_MEM_DRIVER);
	return -ENOMEM;
}
EXPORT_SYMBOL(drm_buffer_alloc);

/**
 * 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.
 */
int drm_buffer_copy_from_user(struct drm_buffer *buf,
			      void __user *user_data, int size)
{
	int nr_pages = size / PAGE_SIZE + 1;
	int idx;

if (size > buf->size) {
		DRM_ERROR("Requesting to copy %d bytes to a drm buffer with"
				" %d bytes space\n",
				size, buf->size);
		return -EFAULT;
	}

for (idx = 0; idx < nr_pages; ++idx) {

if (DRM_COPY_FROM_USER(buf->data[idx],
			(char *)user_data + idx * PAGE_SIZE,
			min(PAGE_SIZE, size - idx * PAGE_SIZE))) {
			DRM_ERROR("Failed to copy user data (%p) to drm buffer"
					" (%p) %dth page.\n",
					user_data, buf, idx);
			return -EFAULT;

}
	}
	buf->iterator = 0;
	return 0;
}
EXPORT_SYMBOL(drm_buffer_copy_from_user);

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

if (buf != NULL) {

int nr_pages = buf->size / PAGE_SIZE + 1;
		int idx;
		for (idx = 0; idx < nr_pages; ++idx)
			free(buf->data[idx], DRM_MEM_DRIVER);

free(buf, DRM_MEM_DRIVER);
	}
}
EXPORT_SYMBOL(drm_buffer_free);

/**
 * 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.
 */
void *drm_buffer_read_object(struct drm_buffer *buf,
		int objsize, void *stack_obj)
{
	int idx = drm_buffer_index(buf);
	int page = drm_buffer_page(buf);
	void *obj = NULL;

if (idx + objsize <= PAGE_SIZE) {
		obj = &buf->data[page][idx];
	} else {
		/* The object is split which forces copy to temporary object.*/
		int beginsz = PAGE_SIZE - idx;
		memcpy(stack_obj, &buf->data[page][idx], beginsz);

memcpy((char *)stack_obj + beginsz, &buf->data[page + 1][0],
				objsize - beginsz);

obj = stack_obj;
	}

drm_buffer_advance(buf, objsize);
	return obj;
}
EXPORT_SYMBOL(drm_buffer_read_object);

003 File Manager

Editing: drm_buffer.c

Upload File

Create Folder