[intel] Forcibly skip PHY reset on some models
[ipxe.git] / src / core / pixbuf.c
1 /*
2 * Copyright (C) 2013 Michael Brown <mbrown@fensystems.co.uk>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 *
19 * You can also choose to distribute this program under the terms of
20 * the Unmodified Binary Distribution Licence (as given in the file
21 * COPYING.UBDL), provided that you have satisfied its requirements.
22 */
23
24 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
25
26 /** @file
27 *
28 * Pixel buffer
29 *
30 */
31
32 #include <stdlib.h>
33 #include <ipxe/umalloc.h>
34 #include <ipxe/pixbuf.h>
35
36 /**
37 * Free pixel buffer
38 *
39 * @v refcnt Reference count
40 */
41 static void free_pixbuf ( struct refcnt *refcnt ) {
42 struct pixel_buffer *pixbuf =
43 container_of ( refcnt, struct pixel_buffer, refcnt );
44
45 ufree ( pixbuf->data );
46 free ( pixbuf );
47 }
48
49 /**
50 * Allocate pixel buffer
51 *
52 * @v width Width
53 * @h height Height
54 * @ret pixbuf Pixel buffer, or NULL on failure
55 */
56 struct pixel_buffer * alloc_pixbuf ( unsigned int width, unsigned int height ) {
57 struct pixel_buffer *pixbuf;
58
59 /* Allocate and initialise structure */
60 pixbuf = zalloc ( sizeof ( *pixbuf ) );
61 if ( ! pixbuf )
62 goto err_alloc_pixbuf;
63 ref_init ( &pixbuf->refcnt, free_pixbuf );
64 pixbuf->width = width;
65 pixbuf->height = height;
66 pixbuf->len = ( width * height * sizeof ( uint32_t ) );
67
68 /* Allocate pixel data buffer */
69 pixbuf->data = umalloc ( pixbuf->len );
70 if ( ! pixbuf->data )
71 goto err_alloc_data;
72
73 return pixbuf;
74
75 err_alloc_data:
76 pixbuf_put ( pixbuf );
77 err_alloc_pixbuf:
78 return NULL;
79 }