/drivers/gpu/msm/kgsl_sharedmem.h

  1/* Copyright (c) 2002,2007-2010, Code Aurora Forum. All rights reserved.
  2 *
  3 * Redistribution and use in source and binary forms, with or without
  4 * modification, are permitted provided that the following conditions are
  5 * met:
  6 *     * Redistributions of source code must retain the above copyright
  7 *       notice, this list of conditions and the following disclaimer.
  8 *     * Redistributions in binary form must reproduce the above
  9 *       copyright notice, this list of conditions and the following
 10 *       disclaimer in the documentation and/or other materials provided
 11 *       with the distribution.
 12 *     * Neither the name of Code Aurora Forum, Inc. nor the names of its
 13 *       contributors may be used to endorse or promote products derived
 14 *       from this software without specific prior written permission.
 15 *
 16 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 23 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 25 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 26 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 27 *
 28 */
 29#ifndef __GSL_SHAREDMEM_H
 30#define __GSL_SHAREDMEM_H
 31
 32#include <linux/dma-mapping.h>
 33
 34#define KGSL_PAGESIZE           0x1000
 35#define KGSL_PAGESIZE_SHIFT     12
 36#define KGSL_PAGEMASK           (~(KGSL_PAGESIZE - 1))
 37
 38struct kgsl_pagetable;
 39
 40/* Memflags for caching operations */
 41#define KGSL_MEMFLAGS_CACHE_INV		0x00000001
 42#define KGSL_MEMFLAGS_CACHE_FLUSH	0x00000002
 43#define KGSL_MEMFLAGS_CACHE_CLEAN	0x00000004
 44#define KGSL_MEMFLAGS_CACHE_MASK	0x0000000F
 45
 46/* Flags to differentiate memory types */
 47#define KGSL_MEMFLAGS_CONPHYS 	0x00001000
 48#define KGSL_MEMFLAGS_VMALLOC_MEM	0x00002000
 49#define KGSL_MEMFLAGS_HOSTADDR		0x00004000
 50
 51#define KGSL_MEMFLAGS_ALIGNANY	0x00000000
 52#define KGSL_MEMFLAGS_ALIGN32	0x00000000
 53#define KGSL_MEMFLAGS_ALIGN64	0x00060000
 54#define KGSL_MEMFLAGS_ALIGN128	0x00070000
 55#define KGSL_MEMFLAGS_ALIGN256	0x00080000
 56#define KGSL_MEMFLAGS_ALIGN512	0x00090000
 57#define KGSL_MEMFLAGS_ALIGN1K	0x000A0000
 58#define KGSL_MEMFLAGS_ALIGN2K	0x000B0000
 59#define KGSL_MEMFLAGS_ALIGN4K	0x000C0000
 60#define KGSL_MEMFLAGS_ALIGN8K	0x000D0000
 61#define KGSL_MEMFLAGS_ALIGN16K	0x000E0000
 62#define KGSL_MEMFLAGS_ALIGN32K	0x000F0000
 63#define KGSL_MEMFLAGS_ALIGN64K	0x00100000
 64#define KGSL_MEMFLAGS_ALIGNPAGE	KGSL_MEMFLAGS_ALIGN4K
 65
 66
 67#define KGSL_MEMFLAGS_ALIGN_MASK 	0x00FF0000
 68#define KGSL_MEMFLAGS_ALIGN_SHIFT	16
 69
 70
 71/* shared memory allocation */
 72struct kgsl_memdesc {
 73	struct kgsl_pagetable *pagetable;
 74	void  *hostptr;
 75	unsigned int gpuaddr;
 76	unsigned int physaddr;
 77	unsigned int size;
 78	unsigned int priv;
 79};
 80
 81int kgsl_sharedmem_vmalloc(struct kgsl_memdesc *memdesc,
 82			   struct kgsl_pagetable *pagetable, size_t size);
 83
 84static inline int
 85kgsl_sharedmem_alloc_coherent(struct kgsl_memdesc *memdesc, size_t size)
 86{
 87	size = ALIGN(size, KGSL_PAGESIZE);
 88
 89	memdesc->hostptr = dma_alloc_coherent(NULL, size, &memdesc->physaddr,
 90					      GFP_KERNEL);
 91	if (!memdesc->hostptr)
 92		return -ENOMEM;
 93	memdesc->size = size;
 94	memdesc->priv = KGSL_MEMFLAGS_CONPHYS;
 95	return 0;
 96}
 97
 98void kgsl_sharedmem_free(struct kgsl_memdesc *memdesc);
 99
100int kgsl_sharedmem_readl(const struct kgsl_memdesc *memdesc,
101			uint32_t *dst,
102			unsigned int offsetbytes);
103
104int kgsl_sharedmem_read(const struct kgsl_memdesc *memdesc, void *dst,
105			unsigned int offsetbytes, unsigned int sizebytes);
106
107int kgsl_sharedmem_writel(const struct kgsl_memdesc *memdesc,
108			unsigned int offsetbytes,
109			uint32_t src);
110
111int kgsl_sharedmem_write(const struct kgsl_memdesc *memdesc,
112			unsigned int offsetbytes,
113			void *src, unsigned int sizebytes);
114
115int kgsl_sharedmem_set(const struct kgsl_memdesc *memdesc,
116			unsigned int offsetbytes, unsigned int value,
117			unsigned int sizebytes);
118
119void kgsl_cache_range_op(unsigned long addr, int size,
120			 unsigned int flags);
121
122#endif /* __GSL_SHAREDMEM_H */