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-rw-r--r--linux/drivers/media/dvb/dvb-core/dvbdev.c14
-rw-r--r--linux/drivers/media/dvb/dvb-usb/af9015.c2
-rw-r--r--linux/drivers/media/dvb/siano/Kconfig1
-rw-r--r--linux/drivers/media/video/cx18/cx18-driver.c2
-rw-r--r--linux/drivers/media/video/cx18/cx18-streams.c4
-rw-r--r--linux/drivers/media/video/dabusb.c10
-rw-r--r--linux/drivers/media/video/davinci/vpif_display.c2
-rw-r--r--linux/drivers/media/video/em28xx/em28xx-cards.c39
-rw-r--r--linux/drivers/media/video/em28xx/em28xx.h1
-rw-r--r--linux/drivers/media/video/ivtv/ivtv-driver.c2
-rw-r--r--linux/drivers/media/video/ivtv/ivtv-streams.c4
-rw-r--r--linux/drivers/media/video/v4l2-dev.c103
-rw-r--r--linux/drivers/media/video/videobuf-dma-contig.c94
13 files changed, 222 insertions, 56 deletions
diff --git a/linux/drivers/media/dvb/dvb-core/dvbdev.c b/linux/drivers/media/dvb/dvb-core/dvbdev.c
index f6084e19d..2028be23d 100644
--- a/linux/drivers/media/dvb/dvb-core/dvbdev.c
+++ b/linux/drivers/media/dvb/dvb-core/dvbdev.c
@@ -472,6 +472,17 @@ static int dvb_uevent(struct device *dev, struct kobj_uevent_env *env)
}
#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 31)
+static char *dvb_nodename(struct device *dev)
+{
+ struct dvb_device *dvbdev = dev_get_drvdata(dev);
+
+ return kasprintf(GFP_KERNEL, "dvb/adapter%d/%s%d",
+ dvbdev->adapter->num, dnames[dvbdev->type], dvbdev->id);
+}
+
+
+#endif
static int __init init_dvbdev(void)
{
int retval;
@@ -501,6 +512,9 @@ static int __init init_dvbdev(void)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
dvb_class->dev_uevent = dvb_uevent;
#endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 31)
+ dvb_class->nodename = dvb_nodename;
+#endif
return 0;
error:
diff --git a/linux/drivers/media/dvb/dvb-usb/af9015.c b/linux/drivers/media/dvb/dvb-usb/af9015.c
index aeb10db0b..69a00d610 100644
--- a/linux/drivers/media/dvb/dvb-usb/af9015.c
+++ b/linux/drivers/media/dvb/dvb-usb/af9015.c
@@ -108,7 +108,7 @@ static int af9015_rw_udev(struct usb_device *udev, struct req_t *req)
}
/* write requested */
- if (write && req->data_len) {
+ if (write) {
memcpy(&buf[8], req->data, req->data_len);
msg_len += req->data_len;
}
diff --git a/linux/drivers/media/dvb/siano/Kconfig b/linux/drivers/media/dvb/siano/Kconfig
index ff297ceaf..8c1aed77e 100644
--- a/linux/drivers/media/dvb/siano/Kconfig
+++ b/linux/drivers/media/dvb/siano/Kconfig
@@ -28,7 +28,6 @@ config SMS_USB_DRV
config SMS_SDIO_DRV
tristate "SDIO interface support"
depends on DVB_CORE && MMC
- default m
---help---
Choose if you would like to have Siano's support for SDIO interface
endmenu
diff --git a/linux/drivers/media/video/cx18/cx18-driver.c b/linux/drivers/media/video/cx18/cx18-driver.c
index ae13a1546..ede519748 100644
--- a/linux/drivers/media/video/cx18/cx18-driver.c
+++ b/linux/drivers/media/video/cx18/cx18-driver.c
@@ -231,7 +231,7 @@ MODULE_PARM_DESC(enc_pcm_bufs,
"Number of encoder PCM buffers\n"
"\t\t\tDefault is computed from other enc_pcm_* parameters");
-MODULE_PARM_DESC(cx18_first_minor, "Set kernel number assigned to first card");
+MODULE_PARM_DESC(cx18_first_minor, "Set device node number assigned to first card");
MODULE_AUTHOR("Hans Verkuil");
MODULE_DESCRIPTION("CX23418 driver");
diff --git a/linux/drivers/media/video/cx18/cx18-streams.c b/linux/drivers/media/video/cx18/cx18-streams.c
index c134927b3..dabe3fadc 100644
--- a/linux/drivers/media/video/cx18/cx18-streams.c
+++ b/linux/drivers/media/video/cx18/cx18-streams.c
@@ -250,9 +250,9 @@ static int cx18_reg_dev(struct cx18 *cx, int type)
video_set_drvdata(s->video_dev, s);
/* Register device. First try the desired minor, then any free one. */
- ret = video_register_device(s->video_dev, vfl_type, num);
+ ret = video_register_device_no_warn(s->video_dev, vfl_type, num);
if (ret < 0) {
- CX18_ERR("Couldn't register v4l2 device for %s kernel number %d\n",
+ CX18_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
s->name, num);
video_device_release(s->video_dev);
s->video_dev = NULL;
diff --git a/linux/drivers/media/video/dabusb.c b/linux/drivers/media/video/dabusb.c
index cb0a41c45..a0812ce91 100644
--- a/linux/drivers/media/video/dabusb.c
+++ b/linux/drivers/media/video/dabusb.c
@@ -813,8 +813,18 @@ static struct file_operations dabusb_fops =
.release = dabusb_release,
};
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 31)
+static char *dabusb_nodename(struct device *dev)
+{
+ return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
+}
+
+#endif
static struct usb_class_driver dabusb_class = {
.name = "dabusb%d",
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 31)
+ .nodename = dabusb_nodename,
+#endif
.fops = &dabusb_fops,
.minor_base = DABUSB_MINOR,
};
diff --git a/linux/drivers/media/video/davinci/vpif_display.c b/linux/drivers/media/video/davinci/vpif_display.c
index 0f0ec8dc6..a125a452d 100644
--- a/linux/drivers/media/video/davinci/vpif_display.c
+++ b/linux/drivers/media/video/davinci/vpif_display.c
@@ -1422,7 +1422,7 @@ vpif_init_free_channel_objects:
*/
static __init int vpif_probe(struct platform_device *pdev)
{
- const struct subdev_info *subdevdata;
+ const struct vpif_subdev_info *subdevdata;
int i, j = 0, k, q, m, err = 0;
struct i2c_adapter *i2c_adap;
struct vpif_config *config;
diff --git a/linux/drivers/media/video/em28xx/em28xx-cards.c b/linux/drivers/media/video/em28xx/em28xx-cards.c
index d12c8c890..9712f9bd3 100644
--- a/linux/drivers/media/video/em28xx/em28xx-cards.c
+++ b/linux/drivers/media/video/em28xx/em28xx-cards.c
@@ -314,6 +314,7 @@ struct em28xx_board em28xx_boards[] = {
[EM2820_BOARD_TERRATEC_CINERGY_250] = {
.name = "Terratec Cinergy 250 USB",
.tuner_type = TUNER_LG_PAL_NEW_TAPC,
+ .has_ir_i2c = 1,
.tda9887_conf = TDA9887_PRESENT,
.decoder = EM28XX_SAA711X,
.input = { {
@@ -333,6 +334,7 @@ struct em28xx_board em28xx_boards[] = {
[EM2820_BOARD_PINNACLE_USB_2] = {
.name = "Pinnacle PCTV USB 2",
.tuner_type = TUNER_LG_PAL_NEW_TAPC,
+ .has_ir_i2c = 1,
.tda9887_conf = TDA9887_PRESENT,
.decoder = EM28XX_SAA711X,
.input = { {
@@ -357,6 +359,7 @@ struct em28xx_board em28xx_boards[] = {
TDA9887_PORT2_ACTIVE,
.decoder = EM28XX_TVP5150,
.has_msp34xx = 1,
+ .has_ir_i2c = 1,
.input = { {
.type = EM28XX_VMUX_TELEVISION,
.vmux = TVP5150_COMPOSITE0,
@@ -1004,6 +1007,7 @@ struct em28xx_board em28xx_boards[] = {
[EM2800_BOARD_TERRATEC_CINERGY_200] = {
.name = "Terratec Cinergy 200 USB",
.is_em2800 = 1,
+ .has_ir_i2c = 1,
.tuner_type = TUNER_LG_PAL_NEW_TAPC,
.tda9887_conf = TDA9887_PRESENT,
.decoder = EM28XX_SAA711X,
@@ -1077,7 +1081,8 @@ struct em28xx_board em28xx_boards[] = {
} },
},
[EM2820_BOARD_PINNACLE_DVC_90] = {
- .name = "Pinnacle Dazzle DVC 90/100/101/107 / Kaiser Baas Video to DVD maker",
+ .name = "Pinnacle Dazzle DVC 90/100/101/107 / Kaiser Baas Video to DVD maker "
+ "/ Kworld DVD Maker 2",
.tuner_type = TUNER_ABSENT, /* capture only board */
.decoder = EM28XX_SAA711X,
.input = { {
@@ -1682,6 +1687,8 @@ struct usb_device_id em28xx_id_table[] = {
.driver_info = EM2870_BOARD_KWORLD_355U },
{ USB_DEVICE(0x1b80, 0xe302),
.driver_info = EM2820_BOARD_PINNACLE_DVC_90 }, /* Kaiser Baas Video to DVD maker */
+ { USB_DEVICE(0x1b80, 0xe304),
+ .driver_info = EM2820_BOARD_PINNACLE_DVC_90 }, /* Kworld DVD Maker 2 */
{ USB_DEVICE(0x0ccd, 0x0036),
.driver_info = EM2820_BOARD_TERRATEC_CINERGY_250 },
{ USB_DEVICE(0x0ccd, 0x004c),
@@ -2292,12 +2299,8 @@ void em28xx_register_i2c_ir(struct em28xx *dev)
/* detect & configure */
switch (dev->model) {
- case (EM2800_BOARD_UNKNOWN):
- break;
- case (EM2820_BOARD_UNKNOWN):
- break;
- case (EM2800_BOARD_TERRATEC_CINERGY_200):
- case (EM2820_BOARD_TERRATEC_CINERGY_250):
+ case EM2800_BOARD_TERRATEC_CINERGY_200:
+ case EM2820_BOARD_TERRATEC_CINERGY_250:
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
ir->ir_codes = &ir_codes_em_terratec_table;
ir->get_key = em28xx_get_key_terratec;
@@ -2309,7 +2312,7 @@ void em28xx_register_i2c_ir(struct em28xx *dev)
dev->init_data.name = "i2c IR (EM28XX Terratec)";
#endif
break;
- case (EM2820_BOARD_PINNACLE_USB_2):
+ case EM2820_BOARD_PINNACLE_USB_2:
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
ir->ir_codes = &ir_codes_pinnacle_grey_table;
ir->get_key = em28xx_get_key_pinnacle_usb_grey;
@@ -2321,7 +2324,7 @@ void em28xx_register_i2c_ir(struct em28xx *dev)
dev->init_data.name = "i2c IR (EM28XX Pinnacle PCTV)";
#endif
break;
- case (EM2820_BOARD_HAUPPAUGE_WINTV_USB_2):
+ case EM2820_BOARD_HAUPPAUGE_WINTV_USB_2:
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
ir->ir_codes = &ir_codes_hauppauge_new_table;
ir->get_key = em28xx_get_key_em_haup;
@@ -2333,14 +2336,6 @@ void em28xx_register_i2c_ir(struct em28xx *dev)
dev->init_data.name = "i2c IR (EM2840 Hauppauge)";
#endif
break;
- case (EM2820_BOARD_MSI_VOX_USB_2):
- break;
- case (EM2800_BOARD_LEADTEK_WINFAST_USBII):
- break;
- case (EM2800_BOARD_KWORLD_USB2800):
- break;
- case (EM2800_BOARD_GRABBEEX_USB2800):
- break;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30)
@@ -2383,7 +2378,7 @@ void em28xx_card_setup(struct em28xx *dev)
case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
{
struct tveeprom tv;
-#ifdef CONFIG_MODULES
+#if defined(CONFIG_MODULES) && defined(MODULE)
request_module("tveeprom");
#endif
/* Call first TVeeprom */
@@ -2397,10 +2392,6 @@ void em28xx_card_setup(struct em28xx *dev)
dev->i2s_speed = 2048000;
dev->board.has_msp34xx = 1;
}
-#ifdef CONFIG_MODULES
- if (tv.has_ir)
- request_module("ir-kbd-i2c");
-#endif
break;
}
case EM2882_BOARD_KWORLD_ATSC_315U:
@@ -2441,6 +2432,10 @@ void em28xx_card_setup(struct em28xx *dev)
break;
}
+#if defined(CONFIG_MODULES) && defined(MODULE)
+ if (dev->board.has_ir_i2c && !disable_ir)
+ request_module("ir-kbd-i2c");
+#endif
if (dev->board.has_snapshot_button)
em28xx_register_snapshot_button(dev);
diff --git a/linux/drivers/media/video/em28xx/em28xx.h b/linux/drivers/media/video/em28xx/em28xx.h
index 2d0aa6edb..3614402da 100644
--- a/linux/drivers/media/video/em28xx/em28xx.h
+++ b/linux/drivers/media/video/em28xx/em28xx.h
@@ -401,6 +401,7 @@ struct em28xx_board {
unsigned int is_webcam:1;
unsigned int no_audio:1;
unsigned int valid:1;
+ unsigned int has_ir_i2c:1;
unsigned char xclk, i2c_speed;
unsigned char radio_addr;
diff --git a/linux/drivers/media/video/ivtv/ivtv-driver.c b/linux/drivers/media/video/ivtv/ivtv-driver.c
index fbb8586c5..383d401b4 100644
--- a/linux/drivers/media/video/ivtv/ivtv-driver.c
+++ b/linux/drivers/media/video/ivtv/ivtv-driver.c
@@ -246,7 +246,7 @@ MODULE_PARM_DESC(newi2c,
"\t\t\t-1 is autodetect, 0 is off, 1 is on\n"
"\t\t\tDefault is autodetect");
-MODULE_PARM_DESC(ivtv_first_minor, "Set kernel number assigned to first card");
+MODULE_PARM_DESC(ivtv_first_minor, "Set device node number assigned to first card");
MODULE_AUTHOR("Kevin Thayer, Chris Kennedy, Hans Verkuil");
MODULE_DESCRIPTION("CX23415/CX23416 driver");
diff --git a/linux/drivers/media/video/ivtv/ivtv-streams.c b/linux/drivers/media/video/ivtv/ivtv-streams.c
index 15da01710..67699e3f2 100644
--- a/linux/drivers/media/video/ivtv/ivtv-streams.c
+++ b/linux/drivers/media/video/ivtv/ivtv-streams.c
@@ -261,8 +261,8 @@ static int ivtv_reg_dev(struct ivtv *itv, int type)
video_set_drvdata(s->vdev, s);
/* Register device. First try the desired minor, then any free one. */
- if (video_register_device(s->vdev, vfl_type, num)) {
- IVTV_ERR("Couldn't register v4l2 device for %s kernel number %d\n",
+ if (video_register_device_no_warn(s->vdev, vfl_type, num)) {
+ IVTV_ERR("Couldn't register v4l2 device for %s (device node number %d)\n",
s->name, num);
video_device_release(s->vdev);
s->vdev = NULL;
diff --git a/linux/drivers/media/video/v4l2-dev.c b/linux/drivers/media/video/v4l2-dev.c
index 9f04a8e6d..a6d761dec 100644
--- a/linux/drivers/media/video/v4l2-dev.c
+++ b/linux/drivers/media/video/v4l2-dev.c
@@ -86,7 +86,49 @@ static CLASS_DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
*/
static struct video_device *video_device[VIDEO_NUM_DEVICES];
static DEFINE_MUTEX(videodev_lock);
-static DECLARE_BITMAP(video_nums[VFL_TYPE_MAX], VIDEO_NUM_DEVICES);
+static DECLARE_BITMAP(devnode_nums[VFL_TYPE_MAX], VIDEO_NUM_DEVICES);
+
+/* Device node utility functions */
+
+/* Note: these utility functions all assume that vfl_type is in the range
+ [0, VFL_TYPE_MAX-1]. */
+
+#ifdef CONFIG_VIDEO_FIXED_MINOR_RANGES
+/* Return the bitmap corresponding to vfl_type. */
+static inline unsigned long *devnode_bits(int vfl_type)
+{
+ /* Any types not assigned to fixed minor ranges must be mapped to
+ one single bitmap for the purposes of finding a free node number
+ since all those unassigned types use the same minor range. */
+ int idx = (vfl_type > VFL_TYPE_VTX) ? VFL_TYPE_MAX - 1 : vfl_type;
+
+ return devnode_nums[idx];
+}
+#else
+/* Return the bitmap corresponding to vfl_type. */
+static inline unsigned long *devnode_bits(int vfl_type)
+{
+ return devnode_nums[vfl_type];
+}
+#endif
+
+/* Mark device node number vdev->num as used */
+static inline void devnode_set(struct video_device *vdev)
+{
+ set_bit(vdev->num, devnode_bits(vdev->vfl_type));
+}
+
+/* Mark device node number vdev->num as unused */
+static inline void devnode_clear(struct video_device *vdev)
+{
+ clear_bit(vdev->num, devnode_bits(vdev->vfl_type));
+}
+
+/* Try to find a free device node number in the range [from, to> */
+static inline int devnode_find(struct video_device *vdev, int from, int to)
+{
+ return find_next_zero_bit(devnode_bits(vdev->vfl_type), to, from);
+}
struct video_device *video_device_alloc(void)
{
@@ -151,8 +193,8 @@ static void v4l2_device_release(struct device *cd)
the release() callback. */
vdev->cdev = NULL;
- /* Mark minor as free */
- clear_bit(vdev->num, video_nums[vdev->vfl_type]);
+ /* Mark device node number as free */
+ devnode_clear(vdev);
mutex_unlock(&videodev_lock);
@@ -376,13 +418,16 @@ static int get_index(struct video_device *vdev)
* video_register_device - register video4linux devices
* @vdev: video device structure we want to register
* @type: type of device to register
- * @nr: which device number (0 == /dev/video0, 1 == /dev/video1, ...
+ * @nr: which device node number (0 == /dev/video0, 1 == /dev/video1, ...
* -1 == first free)
+ * @warn_if_nr_in_use: warn if the desired device node number
+ * was already in use and another number was chosen instead.
*
- * The registration code assigns minor numbers based on the type
- * requested. -ENFILE is returned in all the device slots for this
- * category are full. If not then the minor field is set and the
- * driver initialize function is called (if non %NULL).
+ * The registration code assigns minor numbers and device node numbers
+ * based on the requested type and registers the new device node with
+ * the kernel.
+ * An error is returned if no free minor or device node number could be
+ * found, or if the registration of the device node failed.
*
* Zero is returned on success.
*
@@ -396,7 +441,8 @@ static int get_index(struct video_device *vdev)
*
* %VFL_TYPE_RADIO - A radio card
*/
-int video_register_device(struct video_device *vdev, int type, int nr)
+static int __video_register_device(struct video_device *vdev, int type, int nr,
+ int warn_if_nr_in_use)
{
int i = 0;
int ret;
@@ -439,7 +485,7 @@ int video_register_device(struct video_device *vdev, int type, int nr)
if (vdev->v4l2_dev && vdev->v4l2_dev->dev)
vdev->parent = vdev->v4l2_dev->dev;
- /* Part 2: find a free minor, kernel number and device index. */
+ /* Part 2: find a free minor, device node number and device index. */
#ifdef CONFIG_VIDEO_FIXED_MINOR_RANGES
/* Keep the ranges for the first four types for historical
* reasons.
@@ -470,21 +516,22 @@ int video_register_device(struct video_device *vdev, int type, int nr)
}
#endif
- /* Pick a minor number */
+ /* Pick a device node number */
mutex_lock(&videodev_lock);
- nr = find_next_zero_bit(video_nums[type], minor_cnt, nr == -1 ? 0 : nr);
+ nr = devnode_find(vdev, nr == -1 ? 0 : nr, minor_cnt);
if (nr == minor_cnt)
- nr = find_first_zero_bit(video_nums[type], minor_cnt);
+ nr = devnode_find(vdev, 0, minor_cnt);
if (nr == minor_cnt) {
- printk(KERN_ERR "could not get a free kernel number\n");
+ printk(KERN_ERR "could not get a free device node number\n");
mutex_unlock(&videodev_lock);
return -ENFILE;
}
#ifdef CONFIG_VIDEO_FIXED_MINOR_RANGES
- /* 1-on-1 mapping of kernel number to minor number */
+ /* 1-on-1 mapping of device node number to minor number */
i = nr;
#else
- /* The kernel number and minor numbers are independent */
+ /* The device node number and minor numbers are independent, so
+ we just find the first free minor number. */
for (i = 0; i < VIDEO_NUM_DEVICES; i++)
if (video_device[i] == NULL)
break;
@@ -496,7 +543,8 @@ int video_register_device(struct video_device *vdev, int type, int nr)
#endif
vdev->minor = i + minor_offset;
vdev->num = nr;
- set_bit(nr, video_nums[type]);
+ devnode_set(vdev);
+
/* Should not happen since we thought this minor was free */
WARN_ON(video_device[vdev->minor] != NULL);
vdev->index = get_index(vdev);
@@ -538,12 +586,12 @@ int video_register_device(struct video_device *vdev, int type, int nr)
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
if (vdev->parent)
vdev->dev.dev = vdev->parent;
- sprintf(vdev->dev.class_id, "%s%d", name_base, nr);
+ sprintf(vdev->dev.class_id, "%s%d", name_base, vdev->num);
ret = class_device_register(&vdev->dev);
#else
if (vdev->parent)
vdev->dev.parent = vdev->parent;
- dev_set_name(&vdev->dev, "%s%d", name_base, nr);
+ dev_set_name(&vdev->dev, "%s%d", name_base, vdev->num);
ret = device_register(&vdev->dev);
#endif
if (ret < 0) {
@@ -570,6 +618,10 @@ int video_register_device(struct video_device *vdev, int type, int nr)
reference to the device goes away. */
vdev->dev.release = v4l2_device_release;
+ if (nr != -1 && nr != vdev->num && warn_if_nr_in_use)
+ printk(KERN_WARNING "%s: requested %s%d, got %s%d\n",
+ __func__, name_base, nr, name_base, vdev->num);
+
/* Part 5: Activate this minor. The char device can now be used. */
mutex_lock(&videodev_lock);
video_device[vdev->minor] = vdev;
@@ -580,14 +632,25 @@ cleanup:
mutex_lock(&videodev_lock);
if (vdev->cdev)
cdev_del(vdev->cdev);
- clear_bit(vdev->num, video_nums[type]);
+ devnode_clear(vdev);
mutex_unlock(&videodev_lock);
/* Mark this video device as never having been registered. */
vdev->minor = -1;
return ret;
}
+
+int video_register_device(struct video_device *vdev, int type, int nr)
+{
+ return __video_register_device(vdev, type, nr, 1);
+}
EXPORT_SYMBOL(video_register_device);
+int video_register_device_no_warn(struct video_device *vdev, int type, int nr)
+{
+ return __video_register_device(vdev, type, nr, 0);
+}
+EXPORT_SYMBOL(video_register_device_no_warn);
+
/**
* video_unregister_device - unregister a video4linux device
* @vdev: the device to unregister
diff --git a/linux/drivers/media/video/videobuf-dma-contig.c b/linux/drivers/media/video/videobuf-dma-contig.c
index 633a124cf..bd1b13e93 100644
--- a/linux/drivers/media/video/videobuf-dma-contig.c
+++ b/linux/drivers/media/video/videobuf-dma-contig.c
@@ -17,6 +17,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
+#include <linux/pagemap.h>
#include <linux/dma-mapping.h>
#include <media/videobuf-dma-contig.h>
#include "compat.h"
@@ -26,6 +27,7 @@ struct videobuf_dma_contig_memory {
void *vaddr;
dma_addr_t dma_handle;
unsigned long size;
+ int is_userptr;
};
#define MAGIC_DC_MEM 0x0733ac61
@@ -109,6 +111,82 @@ static struct vm_operations_struct videobuf_vm_ops = {
.close = videobuf_vm_close,
};
+/**
+ * videobuf_dma_contig_user_put() - reset pointer to user space buffer
+ * @mem: per-buffer private videobuf-dma-contig data
+ *
+ * This function resets the user space pointer
+ */
+static void videobuf_dma_contig_user_put(struct videobuf_dma_contig_memory *mem)
+{
+ mem->is_userptr = 0;
+ mem->dma_handle = 0;
+ mem->size = 0;
+}
+
+/**
+ * videobuf_dma_contig_user_get() - setup user space memory pointer
+ * @mem: per-buffer private videobuf-dma-contig data
+ * @vb: video buffer to map
+ *
+ * This function validates and sets up a pointer to user space memory.
+ * Only physically contiguous pfn-mapped memory is accepted.
+ *
+ * Returns 0 if successful.
+ */
+static int videobuf_dma_contig_user_get(struct videobuf_dma_contig_memory *mem,
+ struct videobuf_buffer *vb)
+{
+ struct mm_struct *mm = current->mm;
+ struct vm_area_struct *vma;
+ unsigned long prev_pfn, this_pfn;
+ unsigned long pages_done, user_address;
+ int ret;
+
+ mem->size = PAGE_ALIGN(vb->size);
+ mem->is_userptr = 0;
+ ret = -EINVAL;
+
+ down_read(&mm->mmap_sem);
+
+ vma = find_vma(mm, vb->baddr);
+ if (!vma)
+ goto out_up;
+
+ if ((vb->baddr + mem->size) > vma->vm_end)
+ goto out_up;
+
+ pages_done = 0;
+ prev_pfn = 0; /* kill warning */
+ user_address = vb->baddr;
+
+ while (pages_done < (mem->size >> PAGE_SHIFT)) {
+ ret = follow_pfn(vma, user_address, &this_pfn);
+ if (ret)
+ break;
+
+ if (pages_done == 0)
+ mem->dma_handle = this_pfn << PAGE_SHIFT;
+ else if (this_pfn != (prev_pfn + 1))
+ ret = -EFAULT;
+
+ if (ret)
+ break;
+
+ prev_pfn = this_pfn;
+ user_address += PAGE_SIZE;
+ pages_done++;
+ }
+
+ if (!ret)
+ mem->is_userptr = 1;
+
+ out_up:
+ up_read(&current->mm->mmap_sem);
+
+ return ret;
+}
+
static void *__videobuf_alloc(size_t size)
{
struct videobuf_dma_contig_memory *mem;
@@ -155,12 +233,11 @@ static int __videobuf_iolock(struct videobuf_queue *q,
case V4L2_MEMORY_USERPTR:
dev_dbg(q->dev, "%s memory method USERPTR\n", __func__);
- /* The only USERPTR currently supported is the one needed for
- read() method.
- */
+ /* handle pointer from user space */
if (vb->baddr)
- return -EINVAL;
+ return videobuf_dma_contig_user_get(mem, vb);
+ /* allocate memory for the read() method */
mem->size = PAGE_ALIGN(vb->size);
mem->vaddr = dma_alloc_coherent(q->dev, mem->size,
&mem->dma_handle, GFP_KERNEL);
@@ -387,7 +464,7 @@ void videobuf_dma_contig_free(struct videobuf_queue *q,
So, it should free memory only if the memory were allocated for
read() operation.
*/
- if ((buf->memory != V4L2_MEMORY_USERPTR) || buf->baddr)
+ if (buf->memory != V4L2_MEMORY_USERPTR)
return;
if (!mem)
@@ -395,6 +472,13 @@ void videobuf_dma_contig_free(struct videobuf_queue *q,
MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+ /* handle user space pointer case */
+ if (buf->baddr) {
+ videobuf_dma_contig_user_put(mem);
+ return;
+ }
+
+ /* read() method */
dma_free_coherent(q->dev, mem->size, mem->vaddr, mem->dma_handle);
mem->vaddr = NULL;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-15 01:19:27 +0000