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[media] saa7164: buffer crc checks and ensure we use the memcpy func

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Buffer crc checks and ensure we use the correct PCIe IO memcpy func

Signed-off-by: Steven Toth <stoth@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Steven Toth 2010-07-31 15:13:45 -03:00 committed by Mauro Carvalho Chehab
parent 46eeb8dd30
commit 12d3203e39
5 changed files with 191 additions and 40 deletions
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7
drivers/media/video/saa7164/saa7164-buffer.c
View File

@ -113,6 +113,7 @@ struct saa7164_buffer *saa7164_buffer_alloc(struct saa7164_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;
@ -129,8 +130,9 @@ struct saa7164_buffer *saa7164_buffer_alloc(struct saa7164_port *port,
goto fail2;
/* init the buffers to a known pattern, easier during debugging */
memset(buf->cpu, 0xff, buf->pci_size);
memset(buf->pt_cpu, 0xff, buf->pt_size);
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\n",
__func__, buf);
@ -296,6 +298,7 @@ struct saa7164_user_buffer *saa7164_buffer_alloc_user(struct saa7164_dev *dev, u
buf->actual_size = len;
buf->pos = 0;
buf->crc = 0;
dprintk(DBGLVL_BUF, "%s() allocated user buffer @ 0x%p\n",
__func__, buf);

46
drivers/media/video/saa7164/saa7164-bus.c
View File

@ -217,28 +217,28 @@ int saa7164_bus_set(struct saa7164_dev *dev, tmComResInfo_t* msg, void *buf)
dprintk(DBGLVL_BUS, "%s() tr4\n", __func__);
/* Split the msg into pieces as the ring wraps */
memcpy(bus->m_pdwSetRing + curr_swp, msg, space_rem);
memcpy(bus->m_pdwSetRing, (u8 *)msg + space_rem,
memcpy_toio(bus->m_pdwSetRing + curr_swp, msg, space_rem);
memcpy_toio(bus->m_pdwSetRing, (u8 *)msg + space_rem,
sizeof(*msg) - space_rem);
memcpy(bus->m_pdwSetRing + sizeof(*msg) - space_rem,
memcpy_toio(bus->m_pdwSetRing + sizeof(*msg) - space_rem,
buf, msg->size);
} else if (space_rem == sizeof(*msg)) {
dprintk(DBGLVL_BUS, "%s() tr5\n", __func__);
/* Additional data at the beginning of the ring */
memcpy(bus->m_pdwSetRing + curr_swp, msg, sizeof(*msg));
memcpy(bus->m_pdwSetRing, buf, msg->size);
memcpy_toio(bus->m_pdwSetRing + curr_swp, msg, sizeof(*msg));
memcpy_toio(bus->m_pdwSetRing, buf, msg->size);
} else {
/* Additional data wraps around the ring */
memcpy(bus->m_pdwSetRing + curr_swp, msg, sizeof(*msg));
memcpy_toio(bus->m_pdwSetRing + curr_swp, msg, sizeof(*msg));
if (msg->size > 0) {
memcpy(bus->m_pdwSetRing + curr_swp +
memcpy_toio(bus->m_pdwSetRing + curr_swp +
sizeof(*msg), buf, space_rem -
sizeof(*msg));
memcpy(bus->m_pdwSetRing, (u8 *)buf +
memcpy_toio(bus->m_pdwSetRing, (u8 *)buf +
space_rem - sizeof(*msg),
bytes_to_write - space_rem);
}
@ -250,8 +250,8 @@ int saa7164_bus_set(struct saa7164_dev *dev, tmComResInfo_t* msg, void *buf)
dprintk(DBGLVL_BUS, "%s() tr6\n", __func__);
/* The ring buffer doesn't wrap, two simple copies */
memcpy(bus->m_pdwSetRing + curr_swp, msg, sizeof(*msg));
memcpy(bus->m_pdwSetRing + curr_swp + sizeof(*msg), buf,
memcpy_toio(bus->m_pdwSetRing + curr_swp, msg, sizeof(*msg));
memcpy_toio(bus->m_pdwSetRing + curr_swp + sizeof(*msg), buf,
msg->size);
}
@ -343,19 +343,19 @@ int saa7164_bus_get(struct saa7164_dev *dev, tmComResInfo_t* msg, void *buf,
new_grp -= bus->m_dwSizeGetRing;
space_rem = bus->m_dwSizeGetRing - curr_grp;
memcpy(&msg_tmp, bus->m_pdwGetRing + curr_grp, space_rem);
memcpy((u8 *)&msg_tmp + space_rem, bus->m_pdwGetRing,
memcpy_fromio(&msg_tmp, bus->m_pdwGetRing + curr_grp, space_rem);
memcpy_fromio((u8 *)&msg_tmp + space_rem, bus->m_pdwGetRing,
bytes_to_read - space_rem);
} else {
/* No wrapping */
memcpy(&msg_tmp, bus->m_pdwGetRing + curr_grp, bytes_to_read);
memcpy_fromio(&msg_tmp, bus->m_pdwGetRing + curr_grp, bytes_to_read);
}
/* No need to update the read positions, because this was a peek */
/* If the caller specifically want to peek, return */
if (peekonly) {
memcpy(msg, &msg_tmp, sizeof(*msg));
memcpy_fromio(msg, &msg_tmp, sizeof(*msg));
goto peekout;
}
@ -401,24 +401,24 @@ int saa7164_bus_get(struct saa7164_dev *dev, tmComResInfo_t* msg, void *buf,
if (space_rem < sizeof(*msg)) {
/* msg wraps around the ring */
memcpy(msg, bus->m_pdwGetRing + curr_grp, space_rem);
memcpy((u8 *)msg + space_rem, bus->m_pdwGetRing,
memcpy_fromio(msg, bus->m_pdwGetRing + curr_grp, space_rem);
memcpy_fromio((u8 *)msg + space_rem, bus->m_pdwGetRing,
sizeof(*msg) - space_rem);
if (buf)
memcpy(buf, bus->m_pdwGetRing + sizeof(*msg) -
memcpy_fromio(buf, bus->m_pdwGetRing + sizeof(*msg) -
space_rem, buf_size);
} else if (space_rem == sizeof(*msg)) {
memcpy(msg, bus->m_pdwGetRing + curr_grp, sizeof(*msg));
memcpy_fromio(msg, bus->m_pdwGetRing + curr_grp, sizeof(*msg));
if (buf)
memcpy(buf, bus->m_pdwGetRing, buf_size);
} else {
/* Additional data wraps around the ring */
memcpy(msg, bus->m_pdwGetRing + curr_grp, sizeof(*msg));
memcpy_fromio(msg, bus->m_pdwGetRing + curr_grp, sizeof(*msg));
if (buf) {
memcpy(buf, bus->m_pdwGetRing + curr_grp +
memcpy_fromio(buf, bus->m_pdwGetRing + curr_grp +
sizeof(*msg), space_rem - sizeof(*msg));
memcpy(buf + space_rem - sizeof(*msg),
memcpy_fromio(buf + space_rem - sizeof(*msg),
bus->m_pdwGetRing, bytes_to_read -
space_rem);
}
@ -427,9 +427,9 @@ int saa7164_bus_get(struct saa7164_dev *dev, tmComResInfo_t* msg, void *buf,
} else {
/* No wrapping */
memcpy(msg, bus->m_pdwGetRing + curr_grp, sizeof(*msg));
memcpy_fromio(msg, bus->m_pdwGetRing + curr_grp, sizeof(*msg));
if (buf)
memcpy(buf, bus->m_pdwGetRing + curr_grp + sizeof(*msg),
memcpy_fromio(buf, bus->m_pdwGetRing + curr_grp + sizeof(*msg),
buf_size);
}

157
drivers/media/video/saa7164/saa7164-core.c
View File

@ -72,6 +72,28 @@ LIST_HEAD(saa7164_devlist);
#define INT_SIZE 16
void saa7164_dumphex16FF(struct saa7164_dev *dev, u8 *buf, int len)
{
int i;
u8 tmp[16];
memset(&tmp[0], 0xff, sizeof(tmp));
printk(KERN_INFO "--------------------> "
"00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f\n");
for (i = 0; i < len; i += 16) {
if (memcmp(&tmp, buf + i, sizeof(tmp)) != 0) {
printk(KERN_INFO " [0x%08x] "
"%02x %02x %02x %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x %02x %02x %02x %02x\n", i,
*(buf+i+0), *(buf+i+1), *(buf+i+2), *(buf+i+3),
*(buf+i+4), *(buf+i+5), *(buf+i+6), *(buf+i+7),
*(buf+i+8), *(buf+i+9), *(buf+i+10), *(buf+i+11),
*(buf+i+12), *(buf+i+13), *(buf+i+14), *(buf+i+15));
}
}
}
static void saa7164_ts_verifier(struct saa7164_buffer *buf)
{
struct saa7164_port *port = buf->port;
@ -216,6 +238,7 @@ static void saa7164_work_enchandler(struct work_struct *w)
struct saa7164_user_buffer *ubuf;
struct list_head *c, *n;
int wp, rp, i = 0;
u32 crc, ok = 0;
u8 *p;
port->last_svc_msecs_diff = port->last_svc_msecs;
@ -277,10 +300,19 @@ static void saa7164_work_enchandler(struct work_struct *w)
saa7164_dumphex16(dev, p + buf->actual_size - 32, 64);
}
if (buf->idx == wp) {
/* Ignore this, it's being updated currently by the dma engine */
} else
if (buf->idx == rp) {
crc = crc32(0, buf->cpu, buf->actual_size);
if (crc != port->shadow_crc[rp])
printk(KERN_ERR "%s crc didn't match shadow was 0x%x now 0x%x\n",
__func__, port->shadow_crc[rp], crc);
/* Found the buffer, deal with it */
dprintk(DBGLVL_IRQ, "%s() wp: %d processing: %d\n",
__func__, wp, rp);
dprintk(DBGLVL_IRQ, "%s() wp: %d processing: %d crc32: 0x%x\n",
__func__, wp, rp, buf->crc);
/* Validate the incoming buffer content */
if (port->encoder_params.stream_type == V4L2_MPEG_STREAM_TYPE_MPEG2_TS)
@ -293,9 +325,23 @@ static void saa7164_work_enchandler(struct work_struct *w)
ubuf = list_first_entry(&port->list_buf_free.list,
struct saa7164_user_buffer, list);
if (ubuf->actual_size == buf->actual_size) {
memcpy(ubuf->data, buf->cpu,
ubuf->actual_size);
if (ubuf->actual_size >= buf->actual_size) {
memcpy(ubuf->data, port->shadow_buf[rp], 312 * 188);
/* Throw a new checksum on the read buffer */
ubuf->crc = crc32(0, ubuf->data, ubuf->actual_size);
if ((crc == port->shadow_crc[rp]) && (crc == ubuf->crc))
ok = 1;
else
ok = 0;
if (ok == 0)
printk(KERN_ERR
"rp: %d dmacrc: 0x%08x shadcrc: 0x%08x ubufcrc: 0x%08x %s\n",
rp, buf->crc, port->shadow_crc[rp], ubuf->crc,
ok ? "crcgood" : "crcbad");
} else {
printk(KERN_ERR "buf %p actual fails match\n", buf);
}
@ -315,9 +361,21 @@ static void saa7164_work_enchandler(struct work_struct *w)
/* Ensure offset into buffer remains 0, fill buffer
* with known bad data. */
saa7164_buffer_zero_offsets(port, rp);
memset(buf->cpu, 0xff, buf->pci_size);
memset_io(buf->cpu, 0xff, buf->pci_size);
buf->crc = crc32(0, buf->cpu, buf->actual_size);
// break;
} else {
/* Validate all other checksums, on previous buffers - they should never change */
crc = crc32(0, buf->cpu, buf->actual_size);
if (crc != buf->crc) {
printk(KERN_ERR "buf[%d].crc became invalid, was 0x%x became 0x%x rp: %d wp: %d\n",
buf->idx, buf->crc, crc, rp, wp);
//saa7164_dumphex16FF(dev, (u8 *)buf->cpu, buf->actual_size);
saa7164_dumphex16FF(dev, (u8 *)buf->cpu, 256);
buf->crc = crc;
}
break;
}
}
@ -332,7 +390,6 @@ static void saa7164_work_enchandler(struct work_struct *w)
print_histogram = 64 + port->nr;
}
}
static void saa7164_work_cmdhandler(struct work_struct *w)
{
struct saa7164_dev *dev = container_of(w, struct saa7164_dev, workcmd);
@ -354,7 +411,11 @@ static void saa7164_buffer_deliver(struct saa7164_buffer *buf)
static irqreturn_t saa7164_irq_encoder(struct saa7164_port *port)
{
struct saa7164_dev *dev = port->dev;
int wp, rp;
struct saa7164_buffer *buf;
struct saa7164_user_buffer *ubuf;
struct list_head *c, *n;
int wp, rp, i = 0;
u8 *p;
/* Find the current write point from the hardware */
wp = saa7164_readl(port->bufcounter);
@ -400,7 +461,48 @@ static irqreturn_t saa7164_irq_encoder(struct saa7164_port *port)
port->last_irq_wp,
port->last_irq_rp
);
/* Find the used buffer, shadow copy it before we've
* acked the interrupt.
*/
// mutex_lock(&port->dmaqueue_lock);
list_for_each_safe(c, n, &port->dmaqueue.list) {
buf = list_entry(c, struct saa7164_buffer, list);
if (i++ > port->hwcfg.buffercount) {
printk(KERN_ERR "%s() illegal i count %d\n",
__func__, i);
break;
}
p = (u8 *)buf->cpu;
if ( (*(p + buf->actual_size + 0) != 0xff) ||
(*(p + buf->actual_size + 1) != 0xff) ||
(*(p + buf->actual_size + 2) != 0xff) ||
(*(p + buf->actual_size + 3) != 0xff) ||
(*(p + buf->actual_size + 0x10) != 0xff) ||
(*(p + buf->actual_size + 0x11) != 0xff) ||
(*(p + buf->actual_size + 0x12) != 0xff) ||
(*(p + buf->actual_size + 0x13) != 0xff) )
{
printk(KERN_ERR "buf %p failed guard check\n", buf);
saa7164_dumphex16(dev, p + buf->actual_size - 32, 64);
}
if (buf->idx == rp) {
memcpy_fromio(port->shadow_buf[rp], buf->cpu, 312 * 188);
port->shadow_crc[rp] = crc32(0, port->shadow_buf[rp], 312 * 188);
buf->crc = crc32(0, buf->cpu, 312 * 188);
if (port->shadow_crc[rp] != buf->crc)
printk(KERN_ERR "%s() crc check failed 0x%x vs 0x%x\n",
__func__, port->shadow_crc[rp], buf->crc);
break;
}
}
// mutex_unlock(&port->dmaqueue_lock);
schedule_work(&port->workenc);
return 0;
@ -693,10 +795,10 @@ static void saa7164_dump_busdesc(struct saa7164_dev *dev)
*/
static void saa7164_get_descriptors(struct saa7164_dev *dev)
{
memcpy(&dev->hwdesc, dev->bmmio, sizeof(tmComResHWDescr_t));
memcpy(&dev->intfdesc, dev->bmmio + sizeof(tmComResHWDescr_t),
memcpy_fromio(&dev->hwdesc, dev->bmmio, sizeof(tmComResHWDescr_t));
memcpy_fromio(&dev->intfdesc, dev->bmmio + sizeof(tmComResHWDescr_t),
sizeof(tmComResInterfaceDescr_t));
memcpy(&dev->busdesc, dev->bmmio + dev->intfdesc.BARLocation,
memcpy_fromio(&dev->busdesc, dev->bmmio + dev->intfdesc.BARLocation,
sizeof(tmComResBusDescr_t));
if (dev->hwdesc.bLength != sizeof(tmComResHWDescr_t)) {
@ -742,6 +844,7 @@ static int get_resources(struct saa7164_dev *dev)
static int saa7164_port_init(struct saa7164_dev *dev, int portnr)
{
struct saa7164_port *port = 0;
int i;
if ((portnr < 0) || (portnr >= SAA7164_MAX_PORTS))
BUG();
@ -780,6 +883,18 @@ static int saa7164_port_init(struct saa7164_dev *dev, int portnr)
saa7164_histogram_reset(&port->poll_interval,
"encoder poll() intervals");
if (port->type == SAA7164_MPEG_ENCODER) {
for (i = 0; i < 8; i ++) {
port->shadow_buf[i] = kzalloc(312 * 188, GFP_KERNEL);
if (port->shadow_buf[i] == 0)
printk(KERN_ERR "%s() shadow_buf ENOMEM\n", __func__);
else {
memset(port->shadow_buf[i], 0xff, 312 * 188);
port->shadow_crc[i] = crc32(0, port->shadow_buf[i], 312 * 188);
}
}
}
return 0;
}
@ -1057,6 +1172,8 @@ static void saa7164_shutdown(struct saa7164_dev *dev)
static void __devexit saa7164_finidev(struct pci_dev *pci_dev)
{
struct saa7164_dev *dev = pci_get_drvdata(pci_dev);
struct saa7164_port *port;
int i;
saa7164_histogram_print(&dev->ports[ SAA7164_PORT_ENC1 ],
&dev->ports[ SAA7164_PORT_ENC1 ].irq_interval);
@ -1071,6 +1188,22 @@ static void __devexit saa7164_finidev(struct pci_dev *pci_dev)
saa7164_shutdown(dev);
port = &dev->ports[ SAA7164_PORT_ENC1 ];
if (port->type == SAA7164_MPEG_ENCODER) {
for (i = 0; i < 8; i ++) {
kfree(port->shadow_buf[i]);
port->shadow_buf[i] = 0;
}
}
port = &dev->ports[ SAA7164_PORT_ENC2 ];
if (port->type == SAA7164_MPEG_ENCODER) {
for (i = 0; i < 8; i ++) {
kfree(port->shadow_buf[i]);
port->shadow_buf[i] = 0;
}
}
if (saa7164_boards[dev->board].porta == SAA7164_MPEG_DVB)
saa7164_dvb_unregister(&dev->ports[ SAA7164_PORT_TS1 ]);

9
drivers/media/video/saa7164/saa7164-encoder.c
View File

@ -865,6 +865,7 @@ static int saa7164_encoder_start_streaming(struct saa7164_port *port)
/* Configure the encoder with any cache values */
saa7164_api_set_encoder(port);
saa7164_api_get_encoder(port);
saa7164_buffer_cfg_port(port);
@ -1006,11 +1007,19 @@ struct saa7164_user_buffer *saa7164_enc_next_buf(struct saa7164_port *port)
{
struct saa7164_user_buffer *buf = 0;
struct saa7164_dev *dev = port->dev;
u32 crc;
mutex_lock(&port->dmaqueue_lock);
if (!list_empty(&port->list_buf_used.list)) {
buf = list_first_entry(&port->list_buf_used.list,
struct saa7164_user_buffer, list);
crc = crc32(0, buf->data, buf->actual_size);
if (crc != buf->crc) {
printk(KERN_ERR "%s() buf %p crc became invalid, was 0x%x became 0x%x\n", __func__,
buf, buf->crc, crc);
}
}
mutex_unlock(&port->dmaqueue_lock);

12
drivers/media/video/saa7164/saa7164.h
View File

@ -50,6 +50,7 @@
#include <linux/kdev_t.h>
#include <linux/version.h>
#include <linux/mutex.h>
#include <linux/crc32.h>
#include <media/tuner.h>
#include <media/tveeprom.h>
@ -194,6 +195,8 @@ struct saa7164_user_buffer {
u8 *data;
u32 pos;
u32 actual_size;
u32 crc;
};
struct saa7164_fw_status {
@ -282,12 +285,13 @@ struct saa7164_buffer {
/* A block of page align PCI memory */
u32 pci_size; /* PCI allocation size in bytes */
u64 *cpu; /* Virtual address */
u64 __iomem *cpu; /* Virtual address */
dma_addr_t dma; /* Physical address */
u32 crc; /* Checksum for the entire buffer data */
/* A page table that splits the block into a number of entries */
u32 pt_size; /* PCI allocation size in bytes */
u64 *pt_cpu; /* Virtual address */
u64 __iomem *pt_cpu; /* Virtual address */
dma_addr_t pt_dma; /* Physical address */
/* Encoder fops */
@ -386,6 +390,9 @@ struct saa7164_port {
u32 a_cc_errors;
u8 last_v_cc;
u8 last_a_cc;
u8 *shadow_buf[8];
u32 shadow_crc[8];
};
struct saa7164_dev {
@ -536,7 +543,6 @@ extern struct saa7164_user_buffer *saa7164_buffer_alloc_user(
extern void saa7164_buffer_dealloc_user(struct saa7164_user_buffer *buf);
extern int saa7164_buffer_zero_offsets(struct saa7164_port *port, int i);
/* ----------------------------------------------------------- */
/* saa7164-encoder.c */
int saa7164_encoder_register(struct saa7164_port *port);