Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 476 insertions, 0 deletions

diff --git a/sound/pci/trident/trident_memory.c b/sound/pci/trident/trident_memory.c
new file mode 100644
index 00000000000..6cc282681e0
--- /dev/null
+++ b/sound/pci/trident/trident_memory.c
@@ -0,0 +1,476 @@
+/*
+ *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ *  Copyright (c) by Takashi Iwai <tiwai@suse.de>
+ *  Copyright (c) by Scott McNab <sdm@fractalgraphics.com.au>
+ *
+ *  Trident 4DWave-NX memory page allocation (TLB area)
+ *  Trident chip can handle only 16MByte of the memory at the same time.
+ *
+ *
+ *   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
+ *
+ */
+
+#include <sound/driver.h>
+#include <asm/io.h>
+#include <linux/pci.h>
+#include <linux/time.h>
+#include <sound/core.h>
+#include <sound/trident.h>
+
+/* page arguments of these two macros are Trident page (4096 bytes), not like
+ * aligned pages in others
+ */
+#define __set_tlb_bus(trident,page,ptr,addr) \
+	do { (trident)->tlb.entries[page] = cpu_to_le32((addr) & ~(SNDRV_TRIDENT_PAGE_SIZE-1)); \
+	     (trident)->tlb.shadow_entries[page] = (ptr); } while (0)
+#define __tlb_to_ptr(trident,page) \
+	(void*)((trident)->tlb.shadow_entries[page])
+#define __tlb_to_addr(trident,page) \
+	(dma_addr_t)le32_to_cpu((trident->tlb.entries[page]) & ~(SNDRV_TRIDENT_PAGE_SIZE - 1))
+
+#if PAGE_SIZE == 4096
+/* page size == SNDRV_TRIDENT_PAGE_SIZE */
+#define ALIGN_PAGE_SIZE		PAGE_SIZE	/* minimum page size for allocation */
+#define MAX_ALIGN_PAGES		SNDRV_TRIDENT_MAX_PAGES	/* maxmium aligned pages */
+/* fill TLB entrie(s) corresponding to page with ptr */
+#define set_tlb_bus(trident,page,ptr,addr) __set_tlb_bus(trident,page,ptr,addr)
+/* fill TLB entrie(s) corresponding to page with silence pointer */
+#define set_silent_tlb(trident,page)	__set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr)
+/* get aligned page from offset address */
+#define get_aligned_page(offset)	((offset) >> 12)
+/* get offset address from aligned page */
+#define aligned_page_offset(page)	((page) << 12)
+/* get buffer address from aligned page */
+#define page_to_ptr(trident,page)	__tlb_to_ptr(trident, page)
+/* get PCI physical address from aligned page */
+#define page_to_addr(trident,page)	__tlb_to_addr(trident, page)
+
+#elif PAGE_SIZE == 8192
+/* page size == SNDRV_TRIDENT_PAGE_SIZE x 2*/
+#define ALIGN_PAGE_SIZE		PAGE_SIZE
+#define MAX_ALIGN_PAGES		(SNDRV_TRIDENT_MAX_PAGES / 2)
+#define get_aligned_page(offset)	((offset) >> 13)
+#define aligned_page_offset(page)	((page) << 13)
+#define page_to_ptr(trident,page)	__tlb_to_ptr(trident, (page) << 1)
+#define page_to_addr(trident,page)	__tlb_to_addr(trident, (page) << 1)
+
+/* fill TLB entries -- we need to fill two entries */
+static inline void set_tlb_bus(trident_t *trident, int page, unsigned long ptr, dma_addr_t addr)
+{
+	page <<= 1;
+	__set_tlb_bus(trident, page, ptr, addr);
+	__set_tlb_bus(trident, page+1, ptr + SNDRV_TRIDENT_PAGE_SIZE, addr + SNDRV_TRIDENT_PAGE_SIZE);
+}
+static inline void set_silent_tlb(trident_t *trident, int page)
+{
+	page <<= 1;
+	__set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
+	__set_tlb_bus(trident, page+1, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
+}
+
+#else
+/* arbitrary size */
+#define UNIT_PAGES		(PAGE_SIZE / SNDRV_TRIDENT_PAGE_SIZE)
+#define ALIGN_PAGE_SIZE		(SNDRV_TRIDENT_PAGE_SIZE * UNIT_PAGES)
+#define MAX_ALIGN_PAGES		(SNDRV_TRIDENT_MAX_PAGES / UNIT_PAGES)
+/* Note: if alignment doesn't match to the maximum size, the last few blocks
+ * become unusable.  To use such blocks, you'll need to check the validity
+ * of accessing page in set_tlb_bus and set_silent_tlb.  search_empty()
+ * should also check it, too.
+ */
+#define get_aligned_page(offset)	((offset) / ALIGN_PAGE_SIZE)
+#define aligned_page_offset(page)	((page) * ALIGN_PAGE_SIZE)
+#define page_to_ptr(trident,page)	__tlb_to_ptr(trident, (page) * UNIT_PAGES)
+#define page_to_addr(trident,page)	__tlb_to_addr(trident, (page) * UNIT_PAGES)
+
+/* fill TLB entries -- UNIT_PAGES entries must be filled */
+static inline void set_tlb_bus(trident_t *trident, int page, unsigned long ptr, dma_addr_t addr)
+{
+	int i;
+	page *= UNIT_PAGES;
+	for (i = 0; i < UNIT_PAGES; i++, page++) {
+		__set_tlb_bus(trident, page, ptr, addr);
+		ptr += SNDRV_TRIDENT_PAGE_SIZE;
+		addr += SNDRV_TRIDENT_PAGE_SIZE;
+	}
+}
+static inline void set_silent_tlb(trident_t *trident, int page)
+{
+	int i;
+	page *= UNIT_PAGES;
+	for (i = 0; i < UNIT_PAGES; i++, page++)
+		__set_tlb_bus(trident, page, (unsigned long)trident->tlb.silent_page.area, trident->tlb.silent_page.addr);
+}
+
+#endif /* PAGE_SIZE */
+
+/* calculate buffer pointer from offset address */
+inline static void *offset_ptr(trident_t *trident, int offset)
+{
+	char *ptr;
+	ptr = page_to_ptr(trident, get_aligned_page(offset));
+	ptr += offset % ALIGN_PAGE_SIZE;
+	return (void*)ptr;
+}
+
+/* first and last (aligned) pages of memory block */
+#define firstpg(blk)	(((snd_trident_memblk_arg_t*)snd_util_memblk_argptr(blk))->first_page)
+#define lastpg(blk)	(((snd_trident_memblk_arg_t*)snd_util_memblk_argptr(blk))->last_page)
+
+/*
+ * search empty pages which may contain given size
+ */
+static snd_util_memblk_t *
+search_empty(snd_util_memhdr_t *hdr, int size)
+{
+	snd_util_memblk_t *blk, *prev;
+	int page, psize;
+	struct list_head *p;
+
+	psize = get_aligned_page(size + ALIGN_PAGE_SIZE -1);
+	prev = NULL;
+	page = 0;
+	list_for_each(p, &hdr->block) {
+		blk = list_entry(p, snd_util_memblk_t, list);
+		if (page + psize <= firstpg(blk))
+			goto __found_pages;
+		page = lastpg(blk) + 1;
+	}
+	if (page + psize > MAX_ALIGN_PAGES)
+		return NULL;
+
+__found_pages:
+	/* create a new memory block */
+	blk = __snd_util_memblk_new(hdr, psize * ALIGN_PAGE_SIZE, p->prev);
+	if (blk == NULL)
+		return NULL;
+	blk->offset = aligned_page_offset(page); /* set aligned offset */
+	firstpg(blk) = page;
+	lastpg(blk) = page + psize - 1;
+	return blk;
+}
+
+
+/*
+ * check if the given pointer is valid for pages
+ */
+static int is_valid_page(unsigned long ptr)
+{
+	if (ptr & ~0x3fffffffUL) {
+		snd_printk("max memory size is 1GB!!\n");
+		return 0;
+	}
+	if (ptr & (SNDRV_TRIDENT_PAGE_SIZE-1)) {
+		snd_printk("page is not aligned\n");
+		return 0;
+	}
+	return 1;
+}
+
+/*
+ * page allocation for DMA (Scatter-Gather version)
+ */
+static snd_util_memblk_t *
+snd_trident_alloc_sg_pages(trident_t *trident, snd_pcm_substream_t *substream)
+{
+	snd_util_memhdr_t *hdr;
+	snd_util_memblk_t *blk;
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	int idx, page;
+	struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
+
+	snd_assert(runtime->dma_bytes > 0 && runtime->dma_bytes <= SNDRV_TRIDENT_MAX_PAGES * SNDRV_TRIDENT_PAGE_SIZE, return NULL);
+	hdr = trident->tlb.memhdr;
+	snd_assert(hdr != NULL, return NULL);
+
+	
+
+	down(&hdr->block_mutex);
+	blk = search_empty(hdr, runtime->dma_bytes);
+	if (blk == NULL) {
+		up(&hdr->block_mutex);
+		return NULL;
+	}
+	if (lastpg(blk) - firstpg(blk) >= sgbuf->pages) {
+		snd_printk(KERN_ERR "page calculation doesn't match: allocated pages = %d, trident = %d/%d\n", sgbuf->pages, firstpg(blk), lastpg(blk));
+		__snd_util_mem_free(hdr, blk);
+		up(&hdr->block_mutex);
+		return NULL;
+	}
+			   
+	/* set TLB entries */
+	idx = 0;
+	for (page = firstpg(blk); page <= lastpg(blk); page++, idx++) {
+		dma_addr_t addr = sgbuf->table[idx].addr;
+		unsigned long ptr = (unsigned long)sgbuf->table[idx].buf;
+		if (! is_valid_page(addr)) {
+			__snd_util_mem_free(hdr, blk);
+			up(&hdr->block_mutex);
+			return NULL;
+		}
+		set_tlb_bus(trident, page, ptr, addr);
+	}
+	up(&hdr->block_mutex);
+	return blk;
+}
+
+/*
+ * page allocation for DMA (contiguous version)
+ */
+static snd_util_memblk_t *
+snd_trident_alloc_cont_pages(trident_t *trident, snd_pcm_substream_t *substream)
+{
+	snd_util_memhdr_t *hdr;
+	snd_util_memblk_t *blk;
+	int page;
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	dma_addr_t addr;
+	unsigned long ptr;
+
+	snd_assert(runtime->dma_bytes> 0 && runtime->dma_bytes <= SNDRV_TRIDENT_MAX_PAGES * SNDRV_TRIDENT_PAGE_SIZE, return NULL);
+	hdr = trident->tlb.memhdr;
+	snd_assert(hdr != NULL, return NULL);
+
+	down(&hdr->block_mutex);
+	blk = search_empty(hdr, runtime->dma_bytes);
+	if (blk == NULL) {
+		up(&hdr->block_mutex);
+		return NULL;
+	}
+			   
+	/* set TLB entries */
+	addr = runtime->dma_addr;
+	ptr = (unsigned long)runtime->dma_area;
+	for (page = firstpg(blk); page <= lastpg(blk); page++,
+	     ptr += SNDRV_TRIDENT_PAGE_SIZE, addr += SNDRV_TRIDENT_PAGE_SIZE) {
+		if (! is_valid_page(addr)) {
+			__snd_util_mem_free(hdr, blk);
+			up(&hdr->block_mutex);
+			return NULL;
+		}
+		set_tlb_bus(trident, page, ptr, addr);
+	}
+	up(&hdr->block_mutex);
+	return blk;
+}
+
+/*
+ * page allocation for DMA
+ */
+snd_util_memblk_t *
+snd_trident_alloc_pages(trident_t *trident, snd_pcm_substream_t *substream)
+{
+	snd_assert(trident != NULL, return NULL);
+	snd_assert(substream != NULL, return NULL);
+	if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV_SG)
+		return snd_trident_alloc_sg_pages(trident, substream);
+	else
+		return snd_trident_alloc_cont_pages(trident, substream);
+}
+
+
+/*
+ * release DMA buffer from page table
+ */
+int snd_trident_free_pages(trident_t *trident, snd_util_memblk_t *blk)
+{
+	snd_util_memhdr_t *hdr;
+	int page;
+
+	snd_assert(trident != NULL, return -EINVAL);
+	snd_assert(blk != NULL, return -EINVAL);
+
+	hdr = trident->tlb.memhdr;
+	down(&hdr->block_mutex);
+	/* reset TLB entries */
+	for (page = firstpg(blk); page <= lastpg(blk); page++)
+		set_silent_tlb(trident, page);
+	/* free memory block */
+	__snd_util_mem_free(hdr, blk);
+	up(&hdr->block_mutex);
+	return 0;
+}
+
+
+/*----------------------------------------------------------------
+ * memory allocation using multiple pages (for synth)
+ *----------------------------------------------------------------
+ * Unlike the DMA allocation above, non-contiguous pages are
+ * assigned to TLB.
+ *----------------------------------------------------------------*/
+
+/*
+ */
+static int synth_alloc_pages(trident_t *hw, snd_util_memblk_t *blk);
+static int synth_free_pages(trident_t *hw, snd_util_memblk_t *blk);
+
+/*
+ * allocate a synth sample area
+ */
+snd_util_memblk_t *
+snd_trident_synth_alloc(trident_t *hw, unsigned int size)
+{
+	snd_util_memblk_t *blk;
+	snd_util_memhdr_t *hdr = hw->tlb.memhdr; 
+
+	down(&hdr->block_mutex);
+	blk = __snd_util_mem_alloc(hdr, size);
+	if (blk == NULL) {
+		up(&hdr->block_mutex);
+		return NULL;
+	}
+	if (synth_alloc_pages(hw, blk)) {
+		__snd_util_mem_free(hdr, blk);
+		up(&hdr->block_mutex);
+		return NULL;
+	}
+	up(&hdr->block_mutex);
+	return blk;
+}
+
+
+/*
+ * free a synth sample area
+ */
+int
+snd_trident_synth_free(trident_t *hw, snd_util_memblk_t *blk)
+{
+	snd_util_memhdr_t *hdr = hw->tlb.memhdr; 
+
+	down(&hdr->block_mutex);
+	synth_free_pages(hw, blk);
+	 __snd_util_mem_free(hdr, blk);
+	up(&hdr->block_mutex);
+	return 0;
+}
+
+
+/*
+ * reset TLB entry and free kernel page
+ */
+static void clear_tlb(trident_t *trident, int page)
+{
+	void *ptr = page_to_ptr(trident, page);
+	dma_addr_t addr = page_to_addr(trident, page);
+	set_silent_tlb(trident, page);
+	if (ptr) {
+		struct snd_dma_buffer dmab;
+		dmab.dev.type = SNDRV_DMA_TYPE_DEV;
+		dmab.dev.dev = snd_dma_pci_data(trident->pci);
+		dmab.area = ptr;
+		dmab.addr = addr;
+		dmab.bytes = ALIGN_PAGE_SIZE;
+		snd_dma_free_pages(&dmab);
+	}
+}
+
+/* check new allocation range */
+static void get_single_page_range(snd_util_memhdr_t *hdr, snd_util_memblk_t *blk, int *first_page_ret, int *last_page_ret)
+{
+	struct list_head *p;
+	snd_util_memblk_t *q;
+	int first_page, last_page;
+	first_page = firstpg(blk);
+	if ((p = blk->list.prev) != &hdr->block) {
+		q = list_entry(p, snd_util_memblk_t, list);
+		if (lastpg(q) == first_page)
+			first_page++;  /* first page was already allocated */
+	}
+	last_page = lastpg(blk);
+	if ((p = blk->list.next) != &hdr->block) {
+		q = list_entry(p, snd_util_memblk_t, list);
+		if (firstpg(q) == last_page)
+			last_page--; /* last page was already allocated */
+	}
+	*first_page_ret = first_page;
+	*last_page_ret = last_page;
+}
+
+/*
+ * allocate kernel pages and assign them to TLB
+ */
+static int synth_alloc_pages(trident_t *hw, snd_util_memblk_t *blk)
+{
+	int page, first_page, last_page;
+	struct snd_dma_buffer dmab;
+
+	firstpg(blk) = get_aligned_page(blk->offset);
+	lastpg(blk) = get_aligned_page(blk->offset + blk->size - 1);
+	get_single_page_range(hw->tlb.memhdr, blk, &first_page, &last_page);
+
+	/* allocate a kernel page for each Trident page -
+	 * fortunately Trident page size and kernel PAGE_SIZE is identical!
+	 */
+	for (page = first_page; page <= last_page; page++) {
+		if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(hw->pci),
+					ALIGN_PAGE_SIZE, &dmab) < 0)
+			goto __fail;
+		if (! is_valid_page(dmab.addr)) {
+			snd_dma_free_pages(&dmab);
+			goto __fail;
+		}
+		set_tlb_bus(hw, page, (unsigned long)dmab.area, dmab.addr);
+	}
+	return 0;
+
+__fail:
+	/* release allocated pages */
+	last_page = page - 1;
+	for (page = first_page; page <= last_page; page++)
+		clear_tlb(hw, page);
+
+	return -ENOMEM;
+}
+
+/*
+ * free pages
+ */
+static int synth_free_pages(trident_t *trident, snd_util_memblk_t *blk)
+{
+	int page, first_page, last_page;
+
+	get_single_page_range(trident->tlb.memhdr, blk, &first_page, &last_page);
+	for (page = first_page; page <= last_page; page++)
+		clear_tlb(trident, page);
+
+	return 0;
+}
+
+/*
+ * copy_from_user(blk + offset, data, size)
+ */
+int snd_trident_synth_copy_from_user(trident_t *trident, snd_util_memblk_t *blk, int offset, const char __user *data, int size)
+{
+	int page, nextofs, end_offset, temp, temp1;
+
+	offset += blk->offset;
+	end_offset = offset + size;
+	page = get_aligned_page(offset) + 1;
+	do {
+		nextofs = aligned_page_offset(page);
+		temp = nextofs - offset;
+		temp1 = end_offset - offset;
+		if (temp1 < temp)
+			temp = temp1;
+		if (copy_from_user(offset_ptr(trident, offset), data, temp))
+			return -EFAULT;
+		offset = nextofs;
+		data += temp;
+		page++;
+	} while (offset < end_offset);
+	return 0;
+}
+