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Diffstat (limited to 'drivers/media/video/ivtv/ivtv-udma.c')
-rw-r--r--drivers/media/video/ivtv/ivtv-udma.c234
1 files changed, 0 insertions, 234 deletions
diff --git a/drivers/media/video/ivtv/ivtv-udma.c b/drivers/media/video/ivtv/ivtv-udma.c
deleted file mode 100644
index 7338cb2d0a38..000000000000
--- a/drivers/media/video/ivtv/ivtv-udma.c
+++ /dev/null
@@ -1,234 +0,0 @@
-/*
-    User DMA
-
-    Copyright (C) 2003-2004  Kevin Thayer <nufan_wfk at yahoo.com>
-    Copyright (C) 2004  Chris Kennedy <c@groovy.org>
-    Copyright (C) 2005-2007  Hans Verkuil <hverkuil@xs4all.nl>
-
-    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 "ivtv-driver.h"
-#include "ivtv-udma.h"
-
-void ivtv_udma_get_page_info(struct ivtv_dma_page_info *dma_page, unsigned long first, unsigned long size)
-{
-	dma_page->uaddr = first & PAGE_MASK;
-	dma_page->offset = first & ~PAGE_MASK;
-	dma_page->tail = 1 + ((first+size-1) & ~PAGE_MASK);
-	dma_page->first = (first & PAGE_MASK) >> PAGE_SHIFT;
-	dma_page->last = ((first+size-1) & PAGE_MASK) >> PAGE_SHIFT;
-	dma_page->page_count = dma_page->last - dma_page->first + 1;
-	if (dma_page->page_count == 1) dma_page->tail -= dma_page->offset;
-}
-
-int ivtv_udma_fill_sg_list (struct ivtv_user_dma *dma, struct ivtv_dma_page_info *dma_page, int map_offset)
-{
-	int i, offset;
-	unsigned long flags;
-
-	if (map_offset < 0)
-		return map_offset;
-
-	offset = dma_page->offset;
-
-	/* Fill SG Array with new values */
-	for (i = 0; i < dma_page->page_count; i++) {
-		unsigned int len = (i == dma_page->page_count - 1) ?
-			dma_page->tail : PAGE_SIZE - offset;
-
-		if (PageHighMem(dma->map[map_offset])) {
-			void *src;
-
-			if (dma->bouncemap[map_offset] == NULL)
-				dma->bouncemap[map_offset] = alloc_page(GFP_KERNEL);
-			if (dma->bouncemap[map_offset] == NULL)
-				return -1;
-			local_irq_save(flags);
-			src = kmap_atomic(dma->map[map_offset]) + offset;
-			memcpy(page_address(dma->bouncemap[map_offset]) + offset, src, len);
-			kunmap_atomic(src);
-			local_irq_restore(flags);
-			sg_set_page(&dma->SGlist[map_offset], dma->bouncemap[map_offset], len, offset);
-		}
-		else {
-			sg_set_page(&dma->SGlist[map_offset], dma->map[map_offset], len, offset);
-		}
-		offset = 0;
-		map_offset++;
-	}
-	return map_offset;
-}
-
-void ivtv_udma_fill_sg_array (struct ivtv_user_dma *dma, u32 buffer_offset, u32 buffer_offset_2, u32 split) {
-	int i;
-	struct scatterlist *sg;
-
-	for (i = 0, sg = dma->SGlist; i < dma->SG_length; i++, sg++) {
-		dma->SGarray[i].size = cpu_to_le32(sg_dma_len(sg));
-		dma->SGarray[i].src = cpu_to_le32(sg_dma_address(sg));
-		dma->SGarray[i].dst = cpu_to_le32(buffer_offset);
-		buffer_offset += sg_dma_len(sg);
-
-		split -= sg_dma_len(sg);
-		if (split == 0)
-			buffer_offset = buffer_offset_2;
-	}
-}
-
-/* User DMA Buffers */
-void ivtv_udma_alloc(struct ivtv *itv)
-{
-	if (itv->udma.SG_handle == 0) {
-		/* Map DMA Page Array Buffer */
-		itv->udma.SG_handle = pci_map_single(itv->pdev, itv->udma.SGarray,
-			   sizeof(itv->udma.SGarray), PCI_DMA_TODEVICE);
-		ivtv_udma_sync_for_cpu(itv);
-	}
-}
-
-int ivtv_udma_setup(struct ivtv *itv, unsigned long ivtv_dest_addr,
-		       void __user *userbuf, int size_in_bytes)
-{
-	struct ivtv_dma_page_info user_dma;
-	struct ivtv_user_dma *dma = &itv->udma;
-	int i, err;
-
-	IVTV_DEBUG_DMA("ivtv_udma_setup, dst: 0x%08x\n", (unsigned int)ivtv_dest_addr);
-
-	/* Still in USE */
-	if (dma->SG_length || dma->page_count) {
-		IVTV_DEBUG_WARN("ivtv_udma_setup: SG_length %d page_count %d still full?\n",
-			   dma->SG_length, dma->page_count);
-		return -EBUSY;
-	}
-
-	ivtv_udma_get_page_info(&user_dma, (unsigned long)userbuf, size_in_bytes);
-
-	if (user_dma.page_count <= 0) {
-		IVTV_DEBUG_WARN("ivtv_udma_setup: Error %d page_count from %d bytes %d offset\n",
-			   user_dma.page_count, size_in_bytes, user_dma.offset);
-		return -EINVAL;
-	}
-
-	/* Get user pages for DMA Xfer */
-	down_read(&current->mm->mmap_sem);
-	err = get_user_pages(current, current->mm,
-			user_dma.uaddr, user_dma.page_count, 0, 1, dma->map, NULL);
-	up_read(&current->mm->mmap_sem);
-
-	if (user_dma.page_count != err) {
-		IVTV_DEBUG_WARN("failed to map user pages, returned %d instead of %d\n",
-			   err, user_dma.page_count);
-		if (err >= 0) {
-			for (i = 0; i < err; i++)
-				put_page(dma->map[i]);
-			return -EINVAL;
-		}
-		return err;
-	}
-
-	dma->page_count = user_dma.page_count;
-
-	/* Fill SG List with new values */
-	if (ivtv_udma_fill_sg_list(dma, &user_dma, 0) < 0) {
-		for (i = 0; i < dma->page_count; i++) {
-			put_page(dma->map[i]);
-		}
-		dma->page_count = 0;
-		return -ENOMEM;
-	}
-
-	/* Map SG List */
-	dma->SG_length = pci_map_sg(itv->pdev, dma->SGlist, dma->page_count, PCI_DMA_TODEVICE);
-
-	/* Fill SG Array with new values */
-	ivtv_udma_fill_sg_array (dma, ivtv_dest_addr, 0, -1);
-
-	/* Tag SG Array with Interrupt Bit */
-	dma->SGarray[dma->SG_length - 1].size |= cpu_to_le32(0x80000000);
-
-	ivtv_udma_sync_for_device(itv);
-	return dma->page_count;
-}
-
-void ivtv_udma_unmap(struct ivtv *itv)
-{
-	struct ivtv_user_dma *dma = &itv->udma;
-	int i;
-
-	IVTV_DEBUG_INFO("ivtv_unmap_user_dma\n");
-
-	/* Nothing to free */
-	if (dma->page_count == 0)
-		return;
-
-	/* Unmap Scatterlist */
-	if (dma->SG_length) {
-		pci_unmap_sg(itv->pdev, dma->SGlist, dma->page_count, PCI_DMA_TODEVICE);
-		dma->SG_length = 0;
-	}
-	/* sync DMA */
-	ivtv_udma_sync_for_cpu(itv);
-
-	/* Release User Pages */
-	for (i = 0; i < dma->page_count; i++) {
-		put_page(dma->map[i]);
-	}
-	dma->page_count = 0;
-}
-
-void ivtv_udma_free(struct ivtv *itv)
-{
-	int i;
-
-	/* Unmap SG Array */
-	if (itv->udma.SG_handle) {
-		pci_unmap_single(itv->pdev, itv->udma.SG_handle,
-			 sizeof(itv->udma.SGarray), PCI_DMA_TODEVICE);
-	}
-
-	/* Unmap Scatterlist */
-	if (itv->udma.SG_length) {
-		pci_unmap_sg(itv->pdev, itv->udma.SGlist, itv->udma.page_count, PCI_DMA_TODEVICE);
-	}
-
-	for (i = 0; i < IVTV_DMA_SG_OSD_ENT; i++) {
-		if (itv->udma.bouncemap[i])
-			__free_page(itv->udma.bouncemap[i]);
-	}
-}
-
-void ivtv_udma_start(struct ivtv *itv)
-{
-	IVTV_DEBUG_DMA("start UDMA\n");
-	write_reg(itv->udma.SG_handle, IVTV_REG_DECDMAADDR);
-	write_reg_sync(read_reg(IVTV_REG_DMAXFER) | 0x01, IVTV_REG_DMAXFER);
-	set_bit(IVTV_F_I_DMA, &itv->i_flags);
-	set_bit(IVTV_F_I_UDMA, &itv->i_flags);
-	clear_bit(IVTV_F_I_UDMA_PENDING, &itv->i_flags);
-}
-
-void ivtv_udma_prepare(struct ivtv *itv)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&itv->dma_reg_lock, flags);
-	if (!test_bit(IVTV_F_I_DMA, &itv->i_flags))
-		ivtv_udma_start(itv);
-	else
-		set_bit(IVTV_F_I_UDMA_PENDING, &itv->i_flags);
-	spin_unlock_irqrestore(&itv->dma_reg_lock, flags);
-}
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-10-05 14:32:53 +0000