Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / sound / memalloc.h

diff --git a/kernel/include/sound/memalloc.h b/kernel/include/sound/memalloc.h
new file mode 100644 (file)
index 0000000..782d1df
--- /dev/null
+++ b/kernel/include/sound/memalloc.h
@@ -0,0 +1,157 @@
+/*
+ *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ *                   Takashi Iwai <tiwai@suse.de>
+ * 
+ *  Generic memory allocators
+ *
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+#ifndef __SOUND_MEMALLOC_H
+#define __SOUND_MEMALLOC_H
+
+struct device;
+
+/*
+ * buffer device info
+ */
+struct snd_dma_device {
+       int type;                       /* SNDRV_DMA_TYPE_XXX */
+       struct device *dev;             /* generic device */
+};
+
+#ifndef snd_dma_pci_data
+#define snd_dma_pci_data(pci)  (&(pci)->dev)
+#define snd_dma_isa_data()     NULL
+#define snd_dma_continuous_data(x)     ((struct device *)(__force unsigned long)(x))
+#endif
+
+
+/*
+ * buffer types
+ */
+#define SNDRV_DMA_TYPE_UNKNOWN         0       /* not defined */
+#define SNDRV_DMA_TYPE_CONTINUOUS      1       /* continuous no-DMA memory */
+#define SNDRV_DMA_TYPE_DEV             2       /* generic device continuous */
+#ifdef CONFIG_SND_DMA_SGBUF
+#define SNDRV_DMA_TYPE_DEV_SG          3       /* generic device SG-buffer */
+#else
+#define SNDRV_DMA_TYPE_DEV_SG  SNDRV_DMA_TYPE_DEV /* no SG-buf support */
+#endif
+#ifdef CONFIG_GENERIC_ALLOCATOR
+#define SNDRV_DMA_TYPE_DEV_IRAM                4       /* generic device iram-buffer */
+#else
+#define SNDRV_DMA_TYPE_DEV_IRAM        SNDRV_DMA_TYPE_DEV
+#endif
+
+/*
+ * info for buffer allocation
+ */
+struct snd_dma_buffer {
+       struct snd_dma_device dev;      /* device type */
+       unsigned char *area;    /* virtual pointer */
+       dma_addr_t addr;        /* physical address */
+       size_t bytes;           /* buffer size in bytes */
+       void *private_data;     /* private for allocator; don't touch */
+};
+
+#ifdef CONFIG_SND_DMA_SGBUF
+/*
+ * Scatter-Gather generic device pages
+ */
+void *snd_malloc_sgbuf_pages(struct device *device,
+                            size_t size, struct snd_dma_buffer *dmab,
+                            size_t *res_size);
+int snd_free_sgbuf_pages(struct snd_dma_buffer *dmab);
+
+struct snd_sg_page {
+       void *buf;
+       dma_addr_t addr;
+};
+
+struct snd_sg_buf {
+       int size;       /* allocated byte size */
+       int pages;      /* allocated pages */
+       int tblsize;    /* allocated table size */
+       struct snd_sg_page *table;      /* address table */
+       struct page **page_table;       /* page table (for vmap/vunmap) */
+       struct device *dev;
+};
+
+/*
+ * return the pages matching with the given byte size
+ */
+static inline unsigned int snd_sgbuf_aligned_pages(size_t size)
+{
+       return (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
+}
+
+/*
+ * return the physical address at the corresponding offset
+ */
+static inline dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab,
+                                          size_t offset)
+{
+       struct snd_sg_buf *sgbuf = dmab->private_data;
+       dma_addr_t addr = sgbuf->table[offset >> PAGE_SHIFT].addr;
+       addr &= ~((dma_addr_t)PAGE_SIZE - 1);
+       return addr + offset % PAGE_SIZE;
+}
+
+/*
+ * return the virtual address at the corresponding offset
+ */
+static inline void *snd_sgbuf_get_ptr(struct snd_dma_buffer *dmab,
+                                    size_t offset)
+{
+       struct snd_sg_buf *sgbuf = dmab->private_data;
+       return sgbuf->table[offset >> PAGE_SHIFT].buf + offset % PAGE_SIZE;
+}
+
+unsigned int snd_sgbuf_get_chunk_size(struct snd_dma_buffer *dmab,
+                                     unsigned int ofs, unsigned int size);
+#else
+/* non-SG versions */
+static inline dma_addr_t snd_sgbuf_get_addr(struct snd_dma_buffer *dmab,
+                                           size_t offset)
+{
+       return dmab->addr + offset;
+}
+
+static inline void *snd_sgbuf_get_ptr(struct snd_dma_buffer *dmab,
+                                     size_t offset)
+{
+       return dmab->area + offset;
+}
+
+#define snd_sgbuf_get_chunk_size(dmab, ofs, size)      (size)
+
+#endif /* CONFIG_SND_DMA_SGBUF */
+
+/* allocate/release a buffer */
+int snd_dma_alloc_pages(int type, struct device *dev, size_t size,
+                       struct snd_dma_buffer *dmab);
+int snd_dma_alloc_pages_fallback(int type, struct device *dev, size_t size,
+                                 struct snd_dma_buffer *dmab);
+void snd_dma_free_pages(struct snd_dma_buffer *dmab);
+
+/* basic memory allocation functions */
+void *snd_malloc_pages(size_t size, gfp_t gfp_flags);
+void snd_free_pages(void *ptr, size_t size);
+
+#endif /* __SOUND_MEMALLOC_H */
+