[net-next-2.6.git] / drivers / media / video / saa7164 / saa7164-buffer.c

/*
 *  Driver for the NXP SAA7164 PCIe bridge
 *
 *  Copyright (c) 2010 Steven Toth <stoth@kernellabs.com>
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/slab.h>

#include "saa7164.h"

/* The PCI address space for buffer handling looks like this:

 +-u32 wide-------------+
 |                      +
 +-u64 wide------------------------------------+
 +                                             +
 +----------------------+
 | CurrentBufferPtr     + Pointer to current PCI buffer >-+
 +----------------------+                                 |
 | Unused               +                                 |
 +----------------------+                                 |
 | Pitch                + = 188 (bytes)                   |
 +----------------------+                                 |
 | PCI buffer size      + = pitch * number of lines (312) |
 +----------------------+                                 |
 |0| Buf0 Write Offset  +                                 |
 +----------------------+                                 v
 |1| Buf1 Write Offset  +                                 |
 +----------------------+                                 |
 |2| Buf2 Write Offset  +                                 |
 +----------------------+                                 |
 |3| Buf3 Write Offset  +                                 |
 +----------------------+                                 |
 ... More write offsets                                   |
 +---------------------------------------------+          |
 +0| set of ptrs to PCI pagetables             +          |
 +---------------------------------------------+          |
 +1| set of ptrs to PCI pagetables             + <--------+
 +---------------------------------------------+
 +2| set of ptrs to PCI pagetables             +
 +---------------------------------------------+
 +3| set of ptrs to PCI pagetables             + >--+
 +---------------------------------------------+    |
 ... More buffer pointers                           |  +----------------+
						    +->| pt[0] TS data  |
						    |  +----------------+
						    |
						    |  +----------------+
						    +->| pt[1] TS data  |
						    |  +----------------+
						    | etc
 */

void saa7164_buffer_display(struct saa7164_buffer *buf)
{
	struct saa7164_dev *dev = buf->port->dev;
	int i;

	dprintk(DBGLVL_BUF, "%s()   buffer @ 0x%p nr=%d\n",
		__func__, buf, buf->idx);
	dprintk(DBGLVL_BUF, "  pci_cpu @ 0x%p    dma @ 0x%08llx len = 0x%x\n",
		buf->cpu, (long long)buf->dma, buf->pci_size);
	dprintk(DBGLVL_BUF, "   pt_cpu @ 0x%p pt_dma @ 0x%08llx len = 0x%x\n",
		buf->pt_cpu, (long long)buf->pt_dma, buf->pt_size);

	/* Format the Page Table Entries to point into the data buffer */
	for (i = 0 ; i < SAA7164_PT_ENTRIES; i++) {

		dprintk(DBGLVL_BUF, "    pt[%02d] = 0x%p -> 0x%llx\n",
			i, buf->pt_cpu, (u64)*(buf->pt_cpu));

	}
}
/* Allocate a new buffer structure and associated PCI space in bytes.
 * len must be a multiple of sizeof(u64)
 */
struct saa7164_buffer *saa7164_buffer_alloc(struct saa7164_port *port,
	u32 len)
{
	struct tmHWStreamParameters *params = &port->hw_streamingparams;
	struct saa7164_buffer *buf = 0;
	struct saa7164_dev *dev = port->dev;
	int i;

	if ((len == 0) || (len >= 65536) || (len % sizeof(u64))) {
		log_warn("%s() SAA_ERR_BAD_PARAMETER\n", __func__);
		goto ret;
	}

	buf = kzalloc(sizeof(struct saa7164_buffer), GFP_KERNEL);
	if (buf == NULL) {
		log_warn("%s() SAA_ERR_NO_RESOURCES\n", __func__);
		goto ret;
	}

	buf->idx = -1;
	buf->port = port;
	buf->flags = SAA7164_BUFFER_FREE;
	buf->pos = 0;
	buf->actual_size = params->pitch * params->numberoflines;
	buf->crc = 0;
	/* TODO: arg len is being ignored */
	buf->pci_size = SAA7164_PT_ENTRIES * 0x1000;
	buf->pt_size = (SAA7164_PT_ENTRIES * sizeof(u64)) + 0x1000;

	/* Allocate contiguous memory */
	buf->cpu = pci_alloc_consistent(port->dev->pci, buf->pci_size,
		&buf->dma);
	if (!buf->cpu)
		goto fail1;

	buf->pt_cpu = pci_alloc_consistent(port->dev->pci, buf->pt_size,
		&buf->pt_dma);
	if (!buf->pt_cpu)
		goto fail2;

	/* init the buffers to a known pattern, easier during debugging */
	memset_io(buf->cpu, 0xff, buf->pci_size);
	buf->crc = crc32(0, buf->cpu, buf->actual_size);
	memset_io(buf->pt_cpu, 0xff, buf->pt_size);

	dprintk(DBGLVL_BUF, "%s()   allocated buffer @ 0x%p (%d pageptrs)\n",
		__func__, buf, params->numpagetables);
	dprintk(DBGLVL_BUF, "  pci_cpu @ 0x%p    dma @ 0x%08lx len = 0x%x\n",
		buf->cpu, (long)buf->dma, buf->pci_size);
	dprintk(DBGLVL_BUF, "   pt_cpu @ 0x%p pt_dma @ 0x%08lx len = 0x%x\n",
		buf->pt_cpu, (long)buf->pt_dma, buf->pt_size);

	/* Format the Page Table Entries to point into the data buffer */
	for (i = 0 ; i < params->numpagetables; i++) {

		*(buf->pt_cpu + i) = buf->dma + (i * 0x1000); /* TODO */
		dprintk(DBGLVL_BUF, "    pt[%02d] = 0x%p -> 0x%llx\n",
			i, buf->pt_cpu, (u64)*(buf->pt_cpu));

	}

	goto ret;

fail2:
	pci_free_consistent(port->dev->pci, buf->pci_size, buf->cpu, buf->dma);
fail1:
	kfree(buf);

	buf = 0;
ret:
	return buf;
}

int saa7164_buffer_dealloc(struct saa7164_buffer *buf)
{
	struct saa7164_dev *dev;

	if (!buf || !buf->port)
		return SAA_ERR_BAD_PARAMETER;
	dev = buf->port->dev;

	dprintk(DBGLVL_BUF, "%s() deallocating buffer @ 0x%p\n",
		__func__, buf);

	if (buf->flags != SAA7164_BUFFER_FREE)
		log_warn(" freeing a non-free buffer\n");

	pci_free_consistent(dev->pci, buf->pci_size, buf->cpu, buf->dma);
	pci_free_consistent(dev->pci, buf->pt_size, buf->pt_cpu, buf->pt_dma);

	kfree(buf);

	return SAA_OK;
}

int saa7164_buffer_zero_offsets(struct saa7164_port *port, int i)
{
	struct saa7164_dev *dev = port->dev;

	if ((i < 0) || (i >= port->hwcfg.buffercount))
		return -EINVAL;

	dprintk(DBGLVL_BUF, "%s(idx = %d)\n", __func__, i);

	saa7164_writel(port->bufoffset + (sizeof(u32) * i), 0);

	return 0;
}

/* Write a buffer into the hardware */
int saa7164_buffer_activate(struct saa7164_buffer *buf, int i)
{
	struct saa7164_port *port = buf->port;
	struct saa7164_dev *dev = port->dev;

	if ((i < 0) || (i >= port->hwcfg.buffercount))
		return -EINVAL;

	dprintk(DBGLVL_BUF, "%s(idx = %d)\n", __func__, i);

	buf->idx = i; /* Note of which buffer list index position we occupy */
	buf->flags = SAA7164_BUFFER_BUSY;
	buf->pos = 0;

	/* TODO: Review this in light of 32v64 assignments */
	saa7164_writel(port->bufoffset + (sizeof(u32) * i), 0);
	saa7164_writel(port->bufptr32h + ((sizeof(u32) * 2) * i), buf->pt_dma);
	saa7164_writel(port->bufptr32l + ((sizeof(u32) * 2) * i), 0);

	dprintk(DBGLVL_BUF, "   buf[%d] offset 0x%llx (0x%x) "
		"buf 0x%llx/%llx (0x%x/%x) nr=%d\n",
		buf->idx,
		(u64)port->bufoffset + (i * sizeof(u32)),
		saa7164_readl(port->bufoffset + (sizeof(u32) * i)),
		(u64)port->bufptr32h + ((sizeof(u32) * 2) * i),
		(u64)port->bufptr32l + ((sizeof(u32) * 2) * i),
		saa7164_readl(port->bufptr32h + ((sizeof(u32) * i) * 2)),
		saa7164_readl(port->bufptr32l + ((sizeof(u32) * i) * 2)),
		buf->idx);

	return 0;
}

int saa7164_buffer_cfg_port(struct saa7164_port *port)
{
	struct tmHWStreamParameters *params = &port->hw_streamingparams;
	struct saa7164_dev *dev = port->dev;
	struct saa7164_buffer *buf;
	struct list_head *c, *n;
	int i = 0;

	dprintk(DBGLVL_BUF, "%s(port=%d)\n", __func__, port->nr);

	saa7164_writel(port->bufcounter, 0);
	saa7164_writel(port->pitch, params->pitch);
	saa7164_writel(port->bufsize, params->pitch * params->numberoflines);

	dprintk(DBGLVL_BUF, " configured:\n");
	dprintk(DBGLVL_BUF, "   lmmio       0x%p\n", dev->lmmio);
	dprintk(DBGLVL_BUF, "   bufcounter  0x%x = 0x%x\n", port->bufcounter,
		saa7164_readl(port->bufcounter));

	dprintk(DBGLVL_BUF, "   pitch       0x%x = %d\n", port->pitch,
		saa7164_readl(port->pitch));

	dprintk(DBGLVL_BUF, "   bufsize     0x%x = %d\n", port->bufsize,
		saa7164_readl(port->bufsize));

	dprintk(DBGLVL_BUF, "   buffercount = %d\n", port->hwcfg.buffercount);
	dprintk(DBGLVL_BUF, "   bufoffset = 0x%x\n", port->bufoffset);
	dprintk(DBGLVL_BUF, "   bufptr32h = 0x%x\n", port->bufptr32h);
	dprintk(DBGLVL_BUF, "   bufptr32l = 0x%x\n", port->bufptr32l);

	/* Poke the buffers and offsets into PCI space */
	mutex_lock(&port->dmaqueue_lock);
	list_for_each_safe(c, n, &port->dmaqueue.list) {
		buf = list_entry(c, struct saa7164_buffer, list);

		if (buf->flags != SAA7164_BUFFER_FREE)
			BUG();

		/* Place the buffer in the h/w queue */
		saa7164_buffer_activate(buf, i);

		/* Don't exceed the device maximum # bufs */
		if (i++ > port->hwcfg.buffercount)
			BUG();

	}
	mutex_unlock(&port->dmaqueue_lock);

	return 0;
}

struct saa7164_user_buffer *saa7164_buffer_alloc_user(struct saa7164_dev *dev, u32 len)
{
	struct saa7164_user_buffer *buf;

	buf = kzalloc(sizeof(struct saa7164_user_buffer), GFP_KERNEL);
	if (buf == 0)
		return 0;

	buf->data = kzalloc(len, GFP_KERNEL);

	if (buf->data == 0) {
		kfree(buf);
		return 0;
	}

	buf->actual_size = len;
	buf->pos = 0;
	buf->crc = 0;

	dprintk(DBGLVL_BUF, "%s()   allocated user buffer @ 0x%p\n",
		__func__, buf);

	return buf;
}

void saa7164_buffer_dealloc_user(struct saa7164_user_buffer *buf)
{
	if (!buf)
		return;

	if (buf->data) {
		kfree(buf->data);
		buf->data = 0;
	}

	if (buf)
		kfree(buf);
}
Commit	Line	Data
443c1228 ST	1	/*
	2	* Driver for the NXP SAA7164 PCIe bridge
	3	*
9b8b0199	4	* Copyright (c) 2010 Steven Toth <stoth@kernellabs.com>
443c1228 ST	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	*
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*/
	21
5a0e3ad6 TH	22	#include <linux/slab.h>
5a0e3ad6 TH	23
443c1228 ST	24	#include "saa7164.h"
	25
	26	/* The PCI address space for buffer handling looks like this:
	27
	28	+-u32 wide-------------+
	29	\| +
	30	+-u64 wide------------------------------------+
	31	+ +
	32	+----------------------+
	33	\| CurrentBufferPtr + Pointer to current PCI buffer >-+
	34	+----------------------+ \|
	35	\| Unused + \|
	36	+----------------------+ \|
	37	\| Pitch + = 188 (bytes) \|
	38	+----------------------+ \|
	39	\| PCI buffer size + = pitch * number of lines (312) \|
	40	+----------------------+ \|
	41	\|0\| Buf0 Write Offset + \|
	42	+----------------------+ v
	43	\|1\| Buf1 Write Offset + \|
	44	+----------------------+ \|
	45	\|2\| Buf2 Write Offset + \|
	46	+----------------------+ \|
	47	\|3\| Buf3 Write Offset + \|
	48	+----------------------+ \|
	49	... More write offsets \|
	50	+---------------------------------------------+ \|
	51	+0\| set of ptrs to PCI pagetables + \|
	52	+---------------------------------------------+ \|
	53	+1\| set of ptrs to PCI pagetables + <--------+
	54	+---------------------------------------------+
	55	+2\| set of ptrs to PCI pagetables +
	56	+---------------------------------------------+
	57	+3\| set of ptrs to PCI pagetables + >--+
	58	+---------------------------------------------+ \|
	59	... More buffer pointers \| +----------------+
	60	+->\| pt[0] TS data \|
	61	\| +----------------+
	62	\|
	63	\| +----------------+
	64	+->\| pt[1] TS data \|
	65	\| +----------------+
	66	\| etc
	67	*/
	68
add3f580 ST	69	void saa7164_buffer_display(struct saa7164_buffer *buf)
	70	{
	71	struct saa7164_dev *dev = buf->port->dev;
	72	int i;
	73
	74	dprintk(DBGLVL_BUF, "%s() buffer @ 0x%p nr=%d\n",
	75	__func__, buf, buf->idx);
5cecdc81 MCC	76	dprintk(DBGLVL_BUF, " pci_cpu @ 0x%p dma @ 0x%08llx len = 0x%x\n",
	77	buf->cpu, (long long)buf->dma, buf->pci_size);
	78	dprintk(DBGLVL_BUF, " pt_cpu @ 0x%p pt_dma @ 0x%08llx len = 0x%x\n",
	79	buf->pt_cpu, (long long)buf->pt_dma, buf->pt_size);
add3f580 ST	80
	81	/* Format the Page Table Entries to point into the data buffer */
	82	for (i = 0 ; i < SAA7164_PT_ENTRIES; i++) {
	83
	84	dprintk(DBGLVL_BUF, " pt[%02d] = 0x%p -> 0x%llx\n",
	85	i, buf->pt_cpu, (u64)*(buf->pt_cpu));
	86
	87	}
	88	}
443c1228 ST	89	/* Allocate a new buffer structure and associated PCI space in bytes.
	90	* len must be a multiple of sizeof(u64)
	91	*/
add3f580	92	struct saa7164_buffer saa7164_buffer_alloc(struct saa7164_port port,
443c1228 ST	93	u32 len)
443c1228 ST	94	{
4d270cfb	95	struct tmHWStreamParameters *params = &port->hw_streamingparams;
443c1228 ST	96	struct saa7164_buffer *buf = 0;
	97	struct saa7164_dev *dev = port->dev;
	98	int i;
	99
	100	if ((len == 0) \|\| (len >= 65536) \|\| (len % sizeof(u64))) {
	101	log_warn("%s() SAA_ERR_BAD_PARAMETER\n", __func__);
	102	goto ret;
	103	}
	104
	105	buf = kzalloc(sizeof(struct saa7164_buffer), GFP_KERNEL);
	106	if (buf == NULL) {
	107	log_warn("%s() SAA_ERR_NO_RESOURCES\n", __func__);
	108	goto ret;
	109	}
	110
add3f580	111	buf->idx = -1;
443c1228 ST	112	buf->port = port;
443c1228 ST	113	buf->flags = SAA7164_BUFFER_FREE;
add3f580 ST	114	buf->pos = 0;
add3f580 ST	115	buf->actual_size = params->pitch * params->numberoflines;
12d3203e	116	buf->crc = 0;
443c1228 ST	117	/* TODO: arg len is being ignored */
	118	buf->pci_size = SAA7164_PT_ENTRIES * 0x1000;
	119	buf->pt_size = (SAA7164_PT_ENTRIES * sizeof(u64)) + 0x1000;
	120
	121	/* Allocate contiguous memory */
	122	buf->cpu = pci_alloc_consistent(port->dev->pci, buf->pci_size,
	123	&buf->dma);
	124	if (!buf->cpu)
	125	goto fail1;
	126
	127	buf->pt_cpu = pci_alloc_consistent(port->dev->pci, buf->pt_size,
	128	&buf->pt_dma);
	129	if (!buf->pt_cpu)
	130	goto fail2;
	131
	132	/* init the buffers to a known pattern, easier during debugging */
12d3203e ST	133	memset_io(buf->cpu, 0xff, buf->pci_size);
	134	buf->crc = crc32(0, buf->cpu, buf->actual_size);
	135	memset_io(buf->pt_cpu, 0xff, buf->pt_size);
443c1228	136
1b0e8e46 ST	137	dprintk(DBGLVL_BUF, "%s() allocated buffer @ 0x%p (%d pageptrs)\n",
1b0e8e46 ST	138	__func__, buf, params->numpagetables);
ab205857 MCC	139	dprintk(DBGLVL_BUF, " pci_cpu @ 0x%p dma @ 0x%08lx len = 0x%x\n",
	140	buf->cpu, (long)buf->dma, buf->pci_size);
	141	dprintk(DBGLVL_BUF, " pt_cpu @ 0x%p pt_dma @ 0x%08lx len = 0x%x\n",
	142	buf->pt_cpu, (long)buf->pt_dma, buf->pt_size);
443c1228 ST	143
443c1228 ST	144	/* Format the Page Table Entries to point into the data buffer */
1b0e8e46	145	for (i = 0 ; i < params->numpagetables; i++) {
443c1228 ST	146
443c1228 ST	147	(buf->pt_cpu + i) = buf->dma + (i 0x1000); /* TODO */
1b0e8e46 ST	148	dprintk(DBGLVL_BUF, " pt[%02d] = 0x%p -> 0x%llx\n",
1b0e8e46 ST	149	i, buf->pt_cpu, (u64)*(buf->pt_cpu));
443c1228	150
443c1228 ST	151	}
	152
	153	goto ret;
	154
	155	fail2:
	156	pci_free_consistent(port->dev->pci, buf->pci_size, buf->cpu, buf->dma);
	157	fail1:
	158	kfree(buf);
	159
	160	buf = 0;
	161	ret:
	162	return buf;
	163	}
	164
add3f580	165	int saa7164_buffer_dealloc(struct saa7164_buffer *buf)
443c1228	166	{
23e64d55	167	struct saa7164_dev *dev;
443c1228	168
add3f580	169	if (!buf \|\| !buf->port)
443c1228	170	return SAA_ERR_BAD_PARAMETER;
add3f580	171	dev = buf->port->dev;
443c1228	172
add3f580 ST	173	dprintk(DBGLVL_BUF, "%s() deallocating buffer @ 0x%p\n",
add3f580 ST	174	__func__, buf);
443c1228 ST	175
	176	if (buf->flags != SAA7164_BUFFER_FREE)
	177	log_warn(" freeing a non-free buffer\n");
	178
add3f580 ST	179	pci_free_consistent(dev->pci, buf->pci_size, buf->cpu, buf->dma);
add3f580 ST	180	pci_free_consistent(dev->pci, buf->pt_size, buf->pt_cpu, buf->pt_dma);
443c1228 ST	181
	182	kfree(buf);
	183
	184	return SAA_OK;
	185	}
	186
9230acaa ST	187	int saa7164_buffer_zero_offsets(struct saa7164_port *port, int i)
	188	{
	189	struct saa7164_dev *dev = port->dev;
	190
	191	if ((i < 0) \|\| (i >= port->hwcfg.buffercount))
	192	return -EINVAL;
	193
	194	dprintk(DBGLVL_BUF, "%s(idx = %d)\n", __func__, i);
	195
	196	saa7164_writel(port->bufoffset + (sizeof(u32) * i), 0);
	197
	198	return 0;
	199	}
	200
add3f580 ST	201	/* Write a buffer into the hardware */
	202	int saa7164_buffer_activate(struct saa7164_buffer *buf, int i)
	203	{
	204	struct saa7164_port *port = buf->port;
	205	struct saa7164_dev *dev = port->dev;
	206
	207	if ((i < 0) \|\| (i >= port->hwcfg.buffercount))
	208	return -EINVAL;
	209
	210	dprintk(DBGLVL_BUF, "%s(idx = %d)\n", __func__, i);
	211
	212	buf->idx = i; /* Note of which buffer list index position we occupy */
	213	buf->flags = SAA7164_BUFFER_BUSY;
	214	buf->pos = 0;
	215
	216	/* TODO: Review this in light of 32v64 assignments */
	217	saa7164_writel(port->bufoffset + (sizeof(u32) * i), 0);
	218	saa7164_writel(port->bufptr32h + ((sizeof(u32) * 2) * i), buf->pt_dma);
	219	saa7164_writel(port->bufptr32l + ((sizeof(u32) * 2) * i), 0);
	220
	221	dprintk(DBGLVL_BUF, " buf[%d] offset 0x%llx (0x%x) "
	222	"buf 0x%llx/%llx (0x%x/%x) nr=%d\n",
	223	buf->idx,
	224	(u64)port->bufoffset + (i * sizeof(u32)),
	225	saa7164_readl(port->bufoffset + (sizeof(u32) * i)),
	226	(u64)port->bufptr32h + ((sizeof(u32) * 2) * i),
	227	(u64)port->bufptr32l + ((sizeof(u32) * 2) * i),
	228	saa7164_readl(port->bufptr32h + ((sizeof(u32) * i) * 2)),
	229	saa7164_readl(port->bufptr32l + ((sizeof(u32) * i) * 2)),
	230	buf->idx);
	231
	232	return 0;
	233	}
	234
	235	int saa7164_buffer_cfg_port(struct saa7164_port *port)
	236	{
4d270cfb	237	struct tmHWStreamParameters *params = &port->hw_streamingparams;
add3f580 ST	238	struct saa7164_dev *dev = port->dev;
	239	struct saa7164_buffer *buf;
	240	struct list_head c, n;
	241	int i = 0;
	242
	243	dprintk(DBGLVL_BUF, "%s(port=%d)\n", __func__, port->nr);
	244
	245	saa7164_writel(port->bufcounter, 0);
	246	saa7164_writel(port->pitch, params->pitch);
	247	saa7164_writel(port->bufsize, params->pitch * params->numberoflines);
	248
	249	dprintk(DBGLVL_BUF, " configured:\n");
	250	dprintk(DBGLVL_BUF, " lmmio 0x%p\n", dev->lmmio);
	251	dprintk(DBGLVL_BUF, " bufcounter 0x%x = 0x%x\n", port->bufcounter,
	252	saa7164_readl(port->bufcounter));
	253
	254	dprintk(DBGLVL_BUF, " pitch 0x%x = %d\n", port->pitch,
	255	saa7164_readl(port->pitch));
	256
	257	dprintk(DBGLVL_BUF, " bufsize 0x%x = %d\n", port->bufsize,
	258	saa7164_readl(port->bufsize));
	259
	260	dprintk(DBGLVL_BUF, " buffercount = %d\n", port->hwcfg.buffercount);
	261	dprintk(DBGLVL_BUF, " bufoffset = 0x%x\n", port->bufoffset);
	262	dprintk(DBGLVL_BUF, " bufptr32h = 0x%x\n", port->bufptr32h);
	263	dprintk(DBGLVL_BUF, " bufptr32l = 0x%x\n", port->bufptr32l);
	264
	265	/* Poke the buffers and offsets into PCI space */
	266	mutex_lock(&port->dmaqueue_lock);
	267	list_for_each_safe(c, n, &port->dmaqueue.list) {
	268	buf = list_entry(c, struct saa7164_buffer, list);
	269
	270	if (buf->flags != SAA7164_BUFFER_FREE)
	271	BUG();
	272
	273	/* Place the buffer in the h/w queue */
	274	saa7164_buffer_activate(buf, i);
	275
	276	/* Don't exceed the device maximum # bufs */
	277	if (i++ > port->hwcfg.buffercount)
	278	BUG();
	279
	280	}
	281	mutex_unlock(&port->dmaqueue_lock);
	282
	283	return 0;
	284	}
	285
7615e434 ST	286	struct saa7164_user_buffer saa7164_buffer_alloc_user(struct saa7164_dev dev, u32 len)
	287	{
	288	struct saa7164_user_buffer *buf;
	289
	290	buf = kzalloc(sizeof(struct saa7164_user_buffer), GFP_KERNEL);
	291	if (buf == 0)
	292	return 0;
	293
	294	buf->data = kzalloc(len, GFP_KERNEL);
	295
	296	if (buf->data == 0) {
	297	kfree(buf);
	298	return 0;
	299	}
	300
	301	buf->actual_size = len;
	302	buf->pos = 0;
12d3203e	303	buf->crc = 0;
7615e434 ST	304
	305	dprintk(DBGLVL_BUF, "%s() allocated user buffer @ 0x%p\n",
	306	__func__, buf);
	307
	308	return buf;
	309	}
	310
	311	void saa7164_buffer_dealloc_user(struct saa7164_user_buffer *buf)
	312	{
	313	if (!buf)
	314	return;
	315
	316	if (buf->data) {
	317	kfree(buf->data);
	318	buf->data = 0;
	319	}
	320
	321	if (buf)
	322	kfree(buf);
	323	}
	324