diff options
Diffstat (limited to 'drivers/media/video')
32 files changed, 306 insertions, 212 deletions
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig index ac16e815e275..6830d2848bd7 100644 --- a/drivers/media/video/Kconfig +++ b/drivers/media/video/Kconfig @@ -112,7 +112,7 @@ config VIDEO_IR_I2C # menu "Encoders/decoders and other helper chips" - depends on !VIDEO_HELPER_CHIPS_AUTO + visible if !VIDEO_HELPER_CHIPS_AUTO comment "Audio decoders" diff --git a/drivers/media/video/arv.c b/drivers/media/video/arv.c index 31e7a123d19a..f989f2820d88 100644 --- a/drivers/media/video/arv.c +++ b/drivers/media/video/arv.c @@ -712,7 +712,7 @@ static int ar_initialize(struct ar *ar) static const struct v4l2_file_operations ar_fops = { .owner = THIS_MODULE, .read = ar_read, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops ar_ioctl_ops = { diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c index e071b62f36aa..0902ec041c7a 100644 --- a/drivers/media/video/bt8xx/bttv-driver.c +++ b/drivers/media/video/bt8xx/bttv-driver.c @@ -42,7 +42,6 @@ #include <linux/fs.h> #include <linux/kernel.h> #include <linux/sched.h> -#include <linux/smp_lock.h> #include <linux/interrupt.h> #include <linux/kdev_t.h> #include "bttvp.h" diff --git a/drivers/media/video/bw-qcam.c b/drivers/media/video/bw-qcam.c index 935e0c9a9674..c1193506131c 100644 --- a/drivers/media/video/bw-qcam.c +++ b/drivers/media/video/bw-qcam.c @@ -860,7 +860,7 @@ static ssize_t qcam_read(struct file *file, char __user *buf, static const struct v4l2_file_operations qcam_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .read = qcam_read, }; diff --git a/drivers/media/video/c-qcam.c b/drivers/media/video/c-qcam.c index 6e4b19698c13..24fc00965a12 100644 --- a/drivers/media/video/c-qcam.c +++ b/drivers/media/video/c-qcam.c @@ -718,7 +718,7 @@ static ssize_t qcam_read(struct file *file, char __user *buf, static const struct v4l2_file_operations qcam_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .read = qcam_read, }; diff --git a/drivers/media/video/cafe_ccic.c b/drivers/media/video/cafe_ccic.c index 260c666ce931..0dfff50891e4 100644 --- a/drivers/media/video/cafe_ccic.c +++ b/drivers/media/video/cafe_ccic.c @@ -1775,7 +1775,7 @@ static const struct v4l2_file_operations cafe_v4l_fops = { .read = cafe_v4l_read, .poll = cafe_v4l_poll, .mmap = cafe_v4l_mmap, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops cafe_v4l_ioctl_ops = { diff --git a/drivers/media/video/cx18/cx18-alsa-pcm.c b/drivers/media/video/cx18/cx18-alsa-pcm.c index 8f55692db36d..82d195be9197 100644 --- a/drivers/media/video/cx18/cx18-alsa-pcm.c +++ b/drivers/media/video/cx18/cx18-alsa-pcm.c @@ -218,7 +218,13 @@ static int snd_cx18_pcm_capture_close(struct snd_pcm_substream *substream) static int snd_cx18_pcm_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg) { - return snd_pcm_lib_ioctl(substream, cmd, arg); + struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream); + int ret; + + snd_cx18_lock(cxsc); + ret = snd_pcm_lib_ioctl(substream, cmd, arg); + snd_cx18_unlock(cxsc); + return ret; } diff --git a/drivers/media/video/cx18/cx18-streams.c b/drivers/media/video/cx18/cx18-streams.c index 9045f1ece0eb..ab461e27d9dd 100644 --- a/drivers/media/video/cx18/cx18-streams.c +++ b/drivers/media/video/cx18/cx18-streams.c @@ -41,7 +41,7 @@ static struct v4l2_file_operations cx18_v4l2_enc_fops = { .read = cx18_v4l2_read, .open = cx18_v4l2_open, /* FIXME change to video_ioctl2 if serialization lock can be removed */ - .ioctl = cx18_v4l2_ioctl, + .unlocked_ioctl = cx18_v4l2_ioctl, .release = cx18_v4l2_close, .poll = cx18_v4l2_enc_poll, }; diff --git a/drivers/media/video/cx88/cx88-blackbird.c b/drivers/media/video/cx88/cx88-blackbird.c index 417d1d5c73c4..d7c94848249e 100644 --- a/drivers/media/video/cx88/cx88-blackbird.c +++ b/drivers/media/video/cx88/cx88-blackbird.c @@ -33,7 +33,6 @@ #include <linux/delay.h> #include <linux/device.h> #include <linux/firmware.h> -#include <linux/smp_lock.h> #include <media/v4l2-common.h> #include <media/v4l2-ioctl.h> #include <media/cx2341x.h> diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c index ab98c0e07f9f..62cea9549404 100644 --- a/drivers/media/video/cx88/cx88-video.c +++ b/drivers/media/video/cx88/cx88-video.c @@ -31,7 +31,6 @@ #include <linux/kmod.h> #include <linux/kernel.h> #include <linux/slab.h> -#include <linux/smp_lock.h> #include <linux/interrupt.h> #include <linux/dma-mapping.h> #include <linux/delay.h> diff --git a/drivers/media/video/et61x251/et61x251_core.c b/drivers/media/video/et61x251/et61x251_core.c index a5cfc76b40b7..bb164099ea2c 100644 --- a/drivers/media/video/et61x251/et61x251_core.c +++ b/drivers/media/video/et61x251/et61x251_core.c @@ -2530,7 +2530,7 @@ static const struct v4l2_file_operations et61x251_fops = { .owner = THIS_MODULE, .open = et61x251_open, .release = et61x251_release, - .ioctl = et61x251_ioctl, + .unlocked_ioctl = et61x251_ioctl, .read = et61x251_read, .poll = et61x251_poll, .mmap = et61x251_mmap, diff --git a/drivers/media/video/imx074.c b/drivers/media/video/imx074.c index 380e459f899d..27b5dfdfbb93 100644 --- a/drivers/media/video/imx074.c +++ b/drivers/media/video/imx074.c @@ -451,7 +451,6 @@ static int imx074_probe(struct i2c_client *client, ret = imx074_video_probe(icd, client); if (ret < 0) { icd->ops = NULL; - i2c_set_clientdata(client, NULL); kfree(priv); return ret; } @@ -468,7 +467,6 @@ static int imx074_remove(struct i2c_client *client) icd->ops = NULL; if (icl->free_bus) icl->free_bus(icl); - i2c_set_clientdata(client, NULL); client->driver = NULL; kfree(priv); diff --git a/drivers/media/video/ir-kbd-i2c.c b/drivers/media/video/ir-kbd-i2c.c index 5a000c65ae98..ce4a75375909 100644 --- a/drivers/media/video/ir-kbd-i2c.c +++ b/drivers/media/video/ir-kbd-i2c.c @@ -44,7 +44,6 @@ #include <linux/errno.h> #include <linux/slab.h> #include <linux/i2c.h> -#include <linux/i2c-id.h> #include <linux/workqueue.h> #include <media/ir-core.h> diff --git a/drivers/media/video/meye.c b/drivers/media/video/meye.c index 2be23bccd3c8..48d2c2419c13 100644 --- a/drivers/media/video/meye.c +++ b/drivers/media/video/meye.c @@ -1659,7 +1659,7 @@ static const struct v4l2_file_operations meye_fops = { .open = meye_open, .release = meye_release, .mmap = meye_mmap, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .poll = meye_poll, }; @@ -1831,12 +1831,6 @@ static int __devinit meye_probe(struct pci_dev *pcidev, msleep(1); mchip_set(MCHIP_MM_INTA, MCHIP_MM_INTA_HIC_1_MASK); - if (video_register_device(meye.vdev, VFL_TYPE_GRABBER, - video_nr) < 0) { - v4l2_err(v4l2_dev, "video_register_device failed\n"); - goto outvideoreg; - } - mutex_init(&meye.lock); init_waitqueue_head(&meye.proc_list); meye.brightness = 32 << 10; @@ -1858,6 +1852,12 @@ static int __devinit meye_probe(struct pci_dev *pcidev, sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAPICTURE, 0); sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAAGC, 48); + if (video_register_device(meye.vdev, VFL_TYPE_GRABBER, + video_nr) < 0) { + v4l2_err(v4l2_dev, "video_register_device failed\n"); + goto outvideoreg; + } + v4l2_info(v4l2_dev, "Motion Eye Camera Driver v%s.\n", MEYE_DRIVER_VERSION); v4l2_info(v4l2_dev, "mchip KL5A72002 rev. %d, base %lx, irq %d\n", diff --git a/drivers/media/video/ov6650.c b/drivers/media/video/ov6650.c index 31f19373bbae..cf93de988068 100644 --- a/drivers/media/video/ov6650.c +++ b/drivers/media/video/ov6650.c @@ -1174,7 +1174,6 @@ static int ov6650_probe(struct i2c_client *client, if (ret) { icd->ops = NULL; - i2c_set_clientdata(client, NULL); kfree(priv); } @@ -1185,7 +1184,6 @@ static int ov6650_remove(struct i2c_client *client) { struct ov6650 *priv = to_ov6650(client); - i2c_set_clientdata(client, NULL); kfree(priv); return 0; } diff --git a/drivers/media/video/pms.c b/drivers/media/video/pms.c index 7129b50757db..7551907f8c28 100644 --- a/drivers/media/video/pms.c +++ b/drivers/media/video/pms.c @@ -932,7 +932,7 @@ static ssize_t pms_read(struct file *file, char __user *buf, static const struct v4l2_file_operations pms_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .read = pms_read, }; diff --git a/drivers/media/video/pwc/pwc-if.c b/drivers/media/video/pwc/pwc-if.c index e62beb4efdb4..f3dc89da4c4e 100644 --- a/drivers/media/video/pwc/pwc-if.c +++ b/drivers/media/video/pwc/pwc-if.c @@ -62,7 +62,6 @@ #include <linux/module.h> #include <linux/poll.h> #include <linux/slab.h> -#include <linux/smp_lock.h> #ifdef CONFIG_USB_PWC_INPUT_EVDEV #include <linux/usb/input.h> #endif diff --git a/drivers/media/video/s2255drv.c b/drivers/media/video/s2255drv.c index f5a46c458717..a845753665c1 100644 --- a/drivers/media/video/s2255drv.c +++ b/drivers/media/video/s2255drv.c @@ -49,7 +49,6 @@ #include <linux/videodev2.h> #include <linux/version.h> #include <linux/mm.h> -#include <linux/smp_lock.h> #include <media/videobuf-vmalloc.h> #include <media/v4l2-common.h> #include <media/v4l2-device.h> diff --git a/drivers/media/video/saa7134/saa7134-empress.c b/drivers/media/video/saa7134/saa7134-empress.c index 1467a30a434f..b890aafe7d64 100644 --- a/drivers/media/video/saa7134/saa7134-empress.c +++ b/drivers/media/video/saa7134/saa7134-empress.c @@ -21,7 +21,6 @@ #include <linux/list.h> #include <linux/module.h> #include <linux/kernel.h> -#include <linux/smp_lock.h> #include <linux/delay.h> #include "saa7134-reg.h" diff --git a/drivers/media/video/saa7164/saa7164.h b/drivers/media/video/saa7164/saa7164.h index 1d9c5cbbbc52..041ae8e20f68 100644 --- a/drivers/media/video/saa7164/saa7164.h +++ b/drivers/media/video/saa7164/saa7164.h @@ -58,7 +58,6 @@ #include <media/tveeprom.h> #include <media/videobuf-dma-sg.h> #include <media/videobuf-dvb.h> -#include <linux/smp_lock.h> #include <dvb_demux.h> #include <dvb_frontend.h> #include <dvb_net.h> diff --git a/drivers/media/video/sh_vou.c b/drivers/media/video/sh_vou.c index 4e5a8cf76ded..07cf0c6c7c1f 100644 --- a/drivers/media/video/sh_vou.c +++ b/drivers/media/video/sh_vou.c @@ -75,6 +75,7 @@ struct sh_vou_device { int pix_idx; struct videobuf_buffer *active; enum sh_vou_status status; + struct mutex fop_lock; }; struct sh_vou_file { @@ -235,7 +236,7 @@ static void free_buffer(struct videobuf_queue *vq, struct videobuf_buffer *vb) vb->state = VIDEOBUF_NEEDS_INIT; } -/* Locking: caller holds vq->vb_lock mutex */ +/* Locking: caller holds fop_lock mutex */ static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size) { @@ -257,7 +258,7 @@ static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count, return 0; } -/* Locking: caller holds vq->vb_lock mutex */ +/* Locking: caller holds fop_lock mutex */ static int sh_vou_buf_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, enum v4l2_field field) @@ -306,7 +307,7 @@ static int sh_vou_buf_prepare(struct videobuf_queue *vq, return 0; } -/* Locking: caller holds vq->vb_lock mutex and vq->irqlock spinlock */ +/* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */ static void sh_vou_buf_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) { @@ -1190,7 +1191,7 @@ static int sh_vou_open(struct file *file) V4L2_BUF_TYPE_VIDEO_OUTPUT, V4L2_FIELD_NONE, sizeof(struct videobuf_buffer), vdev, - NULL); + &vou_dev->fop_lock); return 0; } @@ -1292,7 +1293,7 @@ static const struct v4l2_file_operations sh_vou_fops = { .owner = THIS_MODULE, .open = sh_vou_open, .release = sh_vou_release, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .mmap = sh_vou_mmap, .poll = sh_vou_poll, }; @@ -1331,6 +1332,7 @@ static int __devinit sh_vou_probe(struct platform_device *pdev) INIT_LIST_HEAD(&vou_dev->queue); spin_lock_init(&vou_dev->lock); + mutex_init(&vou_dev->fop_lock); atomic_set(&vou_dev->use_count, 0); vou_dev->pdata = vou_pdata; vou_dev->status = SH_VOU_IDLE; @@ -1388,6 +1390,7 @@ static int __devinit sh_vou_probe(struct platform_device *pdev) vdev->tvnorms |= V4L2_STD_PAL; vdev->v4l2_dev = &vou_dev->v4l2_dev; vdev->release = video_device_release; + vdev->lock = &vou_dev->fop_lock; vou_dev->vdev = vdev; video_set_drvdata(vdev, vou_dev); diff --git a/drivers/media/video/sn9c102/sn9c102_core.c b/drivers/media/video/sn9c102/sn9c102_core.c index 28e19daadec9..f49fbfb7dc13 100644 --- a/drivers/media/video/sn9c102/sn9c102_core.c +++ b/drivers/media/video/sn9c102/sn9c102_core.c @@ -3238,7 +3238,7 @@ static const struct v4l2_file_operations sn9c102_fops = { .owner = THIS_MODULE, .open = sn9c102_open, .release = sn9c102_release, - .ioctl = sn9c102_ioctl, + .unlocked_ioctl = sn9c102_ioctl, .read = sn9c102_read, .poll = sn9c102_poll, .mmap = sn9c102_mmap, diff --git a/drivers/media/video/usbvision/usbvision-video.c b/drivers/media/video/usbvision/usbvision-video.c index db6b828594f5..011c0c386995 100644 --- a/drivers/media/video/usbvision/usbvision-video.c +++ b/drivers/media/video/usbvision/usbvision-video.c @@ -50,7 +50,6 @@ #include <linux/list.h> #include <linux/timer.h> #include <linux/slab.h> -#include <linux/smp_lock.h> #include <linux/mm.h> #include <linux/highmem.h> #include <linux/vmalloc.h> diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c index f169f7736677..59f8a9ad3796 100644 --- a/drivers/media/video/uvc/uvc_ctrl.c +++ b/drivers/media/video/uvc/uvc_ctrl.c @@ -785,7 +785,7 @@ static void __uvc_find_control(struct uvc_entity *entity, __u32 v4l2_id, } } -struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, +static struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, __u32 v4l2_id, struct uvc_control_mapping **mapping) { struct uvc_control *ctrl = NULL; @@ -944,6 +944,52 @@ done: return ret; } +/* + * Mapping V4L2 controls to UVC controls can be straighforward if done well. + * Most of the UVC controls exist in V4L2, and can be mapped directly. Some + * must be grouped (for instance the Red Balance, Blue Balance and Do White + * Balance V4L2 controls use the White Balance Component UVC control) or + * otherwise translated. The approach we take here is to use a translation + * table for the controls that can be mapped directly, and handle the others + * manually. + */ +int uvc_query_v4l2_menu(struct uvc_video_chain *chain, + struct v4l2_querymenu *query_menu) +{ + struct uvc_menu_info *menu_info; + struct uvc_control_mapping *mapping; + struct uvc_control *ctrl; + u32 index = query_menu->index; + u32 id = query_menu->id; + int ret; + + memset(query_menu, 0, sizeof(*query_menu)); + query_menu->id = id; + query_menu->index = index; + + ret = mutex_lock_interruptible(&chain->ctrl_mutex); + if (ret < 0) + return -ERESTARTSYS; + + ctrl = uvc_find_control(chain, query_menu->id, &mapping); + if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) { + ret = -EINVAL; + goto done; + } + + if (query_menu->index >= mapping->menu_count) { + ret = -EINVAL; + goto done; + } + + menu_info = &mapping->menu_info[query_menu->index]; + strlcpy(query_menu->name, menu_info->name, sizeof query_menu->name); + +done: + mutex_unlock(&chain->ctrl_mutex); + return ret; +} + /* -------------------------------------------------------------------------- * Control transactions diff --git a/drivers/media/video/uvc/uvc_queue.c b/drivers/media/video/uvc/uvc_queue.c index ed6d5449741c..f14581bd707f 100644 --- a/drivers/media/video/uvc/uvc_queue.c +++ b/drivers/media/video/uvc/uvc_queue.c @@ -90,6 +90,39 @@ void uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type, } /* + * Free the video buffers. + * + * This function must be called with the queue lock held. + */ +static int __uvc_free_buffers(struct uvc_video_queue *queue) +{ + unsigned int i; + + for (i = 0; i < queue->count; ++i) { + if (queue->buffer[i].vma_use_count != 0) + return -EBUSY; + } + + if (queue->count) { + vfree(queue->mem); + queue->count = 0; + } + + return 0; +} + +int uvc_free_buffers(struct uvc_video_queue *queue) +{ + int ret; + + mutex_lock(&queue->mutex); + ret = __uvc_free_buffers(queue); + mutex_unlock(&queue->mutex); + + return ret; +} + +/* * Allocate the video buffers. * * Pages are reserved to make sure they will not be swapped, as they will be @@ -110,7 +143,7 @@ int uvc_alloc_buffers(struct uvc_video_queue *queue, unsigned int nbuffers, mutex_lock(&queue->mutex); - if ((ret = uvc_free_buffers(queue)) < 0) + if ((ret = __uvc_free_buffers(queue)) < 0) goto done; /* Bail out if no buffers should be allocated. */ @@ -152,28 +185,6 @@ done: } /* - * Free the video buffers. - * - * This function must be called with the queue lock held. - */ -int uvc_free_buffers(struct uvc_video_queue *queue) -{ - unsigned int i; - - for (i = 0; i < queue->count; ++i) { - if (queue->buffer[i].vma_use_count != 0) - return -EBUSY; - } - - if (queue->count) { - vfree(queue->mem); - queue->count = 0; - } - - return 0; -} - -/* * Check if buffers have been allocated. */ int uvc_queue_allocated(struct uvc_video_queue *queue) @@ -369,6 +380,82 @@ done: } /* + * VMA operations. + */ +static void uvc_vm_open(struct vm_area_struct *vma) +{ + struct uvc_buffer *buffer = vma->vm_private_data; + buffer->vma_use_count++; +} + +static void uvc_vm_close(struct vm_area_struct *vma) +{ + struct uvc_buffer *buffer = vma->vm_private_data; + buffer->vma_use_count--; +} + +static const struct vm_operations_struct uvc_vm_ops = { + .open = uvc_vm_open, + .close = uvc_vm_close, +}; + +/* + * Memory-map a video buffer. + * + * This function implements video buffers memory mapping and is intended to be + * used by the device mmap handler. + */ +int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma) +{ + struct uvc_buffer *uninitialized_var(buffer); + struct page *page; + unsigned long addr, start, size; + unsigned int i; + int ret = 0; + + start = vma->vm_start; + size = vma->vm_end - vma->vm_start; + + mutex_lock(&queue->mutex); + + for (i = 0; i < queue->count; ++i) { + buffer = &queue->buffer[i]; + if ((buffer->buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff) + break; + } + + if (i == queue->count || size != queue->buf_size) { + ret = -EINVAL; + goto done; + } + + /* + * VM_IO marks the area as being an mmaped region for I/O to a + * device. It also prevents the region from being core dumped. + */ + vma->vm_flags |= VM_IO; + + addr = (unsigned long)queue->mem + buffer->buf.m.offset; + while (size > 0) { + page = vmalloc_to_page((void *)addr); + if ((ret = vm_insert_page(vma, start, page)) < 0) + goto done; + + start += PAGE_SIZE; + addr += PAGE_SIZE; + size -= PAGE_SIZE; + } + + vma->vm_ops = &uvc_vm_ops; + vma->vm_private_data = buffer; + uvc_vm_open(vma); + +done: + mutex_unlock(&queue->mutex); + return ret; +} + +/* * Poll the video queue. * * This function implements video queue polling and is intended to be used by diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c index 6d15de9b5204..8cf61e8a634f 100644 --- a/drivers/media/video/uvc/uvc_v4l2.c +++ b/drivers/media/video/uvc/uvc_v4l2.c @@ -101,40 +101,6 @@ done: */ /* - * Mapping V4L2 controls to UVC controls can be straighforward if done well. - * Most of the UVC controls exist in V4L2, and can be mapped directly. Some - * must be grouped (for instance the Red Balance, Blue Balance and Do White - * Balance V4L2 controls use the White Balance Component UVC control) or - * otherwise translated. The approach we take here is to use a translation - * table for the controls that can be mapped directly, and handle the others - * manually. - */ -static int uvc_v4l2_query_menu(struct uvc_video_chain *chain, - struct v4l2_querymenu *query_menu) -{ - struct uvc_menu_info *menu_info; - struct uvc_control_mapping *mapping; - struct uvc_control *ctrl; - u32 index = query_menu->index; - u32 id = query_menu->id; - - ctrl = uvc_find_control(chain, query_menu->id, &mapping); - if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) - return -EINVAL; - - if (query_menu->index >= mapping->menu_count) - return -EINVAL; - - memset(query_menu, 0, sizeof(*query_menu)); - query_menu->id = id; - query_menu->index = index; - - menu_info = &mapping->menu_info[query_menu->index]; - strlcpy(query_menu->name, menu_info->name, sizeof query_menu->name); - return 0; -} - -/* * Find the frame interval closest to the requested frame interval for the * given frame format and size. This should be done by the device as part of * the Video Probe and Commit negotiation, but some hardware don't implement @@ -260,12 +226,14 @@ static int uvc_v4l2_try_format(struct uvc_streaming *stream, * developers test their webcams with the Linux driver as well as with * the Windows driver). */ + mutex_lock(&stream->mutex); if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS) probe->dwMaxVideoFrameSize = stream->ctrl.dwMaxVideoFrameSize; /* Probe the device. */ ret = uvc_probe_video(stream, probe); + mutex_unlock(&stream->mutex); if (ret < 0) goto done; @@ -289,14 +257,21 @@ done: static int uvc_v4l2_get_format(struct uvc_streaming *stream, struct v4l2_format *fmt) { - struct uvc_format *format = stream->cur_format; - struct uvc_frame *frame = stream->cur_frame; + struct uvc_format *format; + struct uvc_frame *frame; + int ret = 0; if (fmt->type != stream->type) return -EINVAL; - if (format == NULL || frame == NULL) - return -EINVAL; + mutex_lock(&stream->mutex); + format = stream->cur_format; + frame = stream->cur_frame; + + if (format == NULL || frame == NULL) { + ret = -EINVAL; + goto done; + } fmt->fmt.pix.pixelformat = format->fcc; fmt->fmt.pix.width = frame->wWidth; @@ -307,7 +282,9 @@ static int uvc_v4l2_get_format(struct uvc_streaming *stream, fmt->fmt.pix.colorspace = format->colorspace; fmt->fmt.pix.priv = 0; - return 0; +done: + mutex_unlock(&stream->mutex); + return ret; } static int uvc_v4l2_set_format(struct uvc_streaming *stream, @@ -321,18 +298,24 @@ static int uvc_v4l2_set_format(struct uvc_streaming *stream, if (fmt->type != stream->type) return -EINVAL; - if (uvc_queue_allocated(&stream->queue)) - return -EBUSY; - ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame); if (ret < 0) return ret; + mutex_lock(&stream->mutex); + + if (uvc_queue_allocated(&stream->queue)) { + ret = -EBUSY; + goto done; + } + memcpy(&stream->ctrl, &probe, sizeof probe); stream->cur_format = format; stream->cur_frame = frame; - return 0; +done: + mutex_unlock(&stream->mutex); + return ret; } static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream, @@ -343,7 +326,10 @@ static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream, if (parm->type != stream->type) return -EINVAL; + mutex_lock(&stream->mutex); numerator = stream->ctrl.dwFrameInterval; + mutex_unlock(&stream->mutex); + denominator = 10000000; uvc_simplify_fraction(&numerator, &denominator, 8, 333); @@ -370,7 +356,6 @@ static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream, static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, struct v4l2_streamparm *parm) { - struct uvc_frame *frame = stream->cur_frame; struct uvc_streaming_control probe; struct v4l2_fract timeperframe; uint32_t interval; @@ -379,28 +364,36 @@ static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, if (parm->type != stream->type) return -EINVAL; - if (uvc_queue_streaming(&stream->queue)) - return -EBUSY; - if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) timeperframe = parm->parm.capture.timeperframe; else timeperframe = parm->parm.output.timeperframe; - memcpy(&probe, &stream->ctrl, sizeof probe); interval = uvc_fraction_to_interval(timeperframe.numerator, timeperframe.denominator); - uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n", timeperframe.numerator, timeperframe.denominator, interval); - probe.dwFrameInterval = uvc_try_frame_interval(frame, interval); + + mutex_lock(&stream->mutex); + + if (uvc_queue_streaming(&stream->queue)) { + mutex_unlock(&stream->mutex); + return -EBUSY; + } + + memcpy(&probe, &stream->ctrl, sizeof probe); + probe.dwFrameInterval = + uvc_try_frame_interval(stream->cur_frame, interval); /* Probe the device with the new settings. */ ret = uvc_probe_video(stream, &probe); - if (ret < 0) + if (ret < 0) { + mutex_unlock(&stream->mutex); return ret; + } memcpy(&stream->ctrl, &probe, sizeof probe); + mutex_unlock(&stream->mutex); /* Return the actual frame period. */ timeperframe.numerator = probe.dwFrameInterval; @@ -528,11 +521,9 @@ static int uvc_v4l2_release(struct file *file) if (uvc_has_privileges(handle)) { uvc_video_enable(stream, 0); - mutex_lock(&stream->queue.mutex); if (uvc_free_buffers(&stream->queue) < 0) uvc_printk(KERN_ERR, "uvc_v4l2_release: Unable to " "free buffers.\n"); - mutex_unlock(&stream->queue.mutex); } /* Release the file handle. */ @@ -624,7 +615,7 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) } case VIDIOC_QUERYMENU: - return uvc_v4l2_query_menu(chain, arg); + return uvc_query_v4l2_menu(chain, arg); case VIDIOC_G_EXT_CTRLS: { @@ -905,15 +896,17 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) case VIDIOC_CROPCAP: { struct v4l2_cropcap *ccap = arg; - struct uvc_frame *frame = stream->cur_frame; if (ccap->type != stream->type) return -EINVAL; ccap->bounds.left = 0; ccap->bounds.top = 0; - ccap->bounds.width = frame->wWidth; - ccap->bounds.height = frame->wHeight; + + mutex_lock(&stream->mutex); + ccap->bounds.width = stream->cur_frame->wWidth; + ccap->bounds.height = stream->cur_frame->wHeight; + mutex_unlock(&stream->mutex); ccap->defrect = ccap->bounds; @@ -930,8 +923,6 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) case VIDIOC_REQBUFS: { struct v4l2_requestbuffers *rb = arg; - unsigned int bufsize = - stream->ctrl.dwMaxVideoFrameSize; if (rb->type != stream->type || rb->memory != V4L2_MEMORY_MMAP) @@ -940,7 +931,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) if ((ret = uvc_acquire_privileges(handle)) < 0) return ret; - ret = uvc_alloc_buffers(&stream->queue, rb->count, bufsize); + mutex_lock(&stream->mutex); + ret = uvc_alloc_buffers(&stream->queue, rb->count, + stream->ctrl.dwMaxVideoFrameSize); + mutex_unlock(&stream->mutex); if (ret < 0) return ret; @@ -988,7 +982,9 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) if (!uvc_has_privileges(handle)) return -EBUSY; + mutex_lock(&stream->mutex); ret = uvc_video_enable(stream, 1); + mutex_unlock(&stream->mutex); if (ret < 0) return ret; break; @@ -1068,79 +1064,14 @@ static ssize_t uvc_v4l2_read(struct file *file, char __user *data, return -EINVAL; } -/* - * VMA operations. - */ -static void uvc_vm_open(struct vm_area_struct *vma) -{ - struct uvc_buffer *buffer = vma->vm_private_data; - buffer->vma_use_count++; -} - -static void uvc_vm_close(struct vm_area_struct *vma) -{ - struct uvc_buffer *buffer = vma->vm_private_data; - buffer->vma_use_count--; -} - -static const struct vm_operations_struct uvc_vm_ops = { - .open = uvc_vm_open, - .close = uvc_vm_close, -}; - static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma) { struct uvc_fh *handle = file->private_data; struct uvc_streaming *stream = handle->stream; - struct uvc_video_queue *queue = &stream->queue; - struct uvc_buffer *uninitialized_var(buffer); - struct page *page; - unsigned long addr, start, size; - unsigned int i; - int ret = 0; uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n"); - start = vma->vm_start; - size = vma->vm_end - vma->vm_start; - - mutex_lock(&queue->mutex); - - for (i = 0; i < queue->count; ++i) { - buffer = &queue->buffer[i]; - if ((buffer->buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff) - break; - } - - if (i == queue->count || size != queue->buf_size) { - ret = -EINVAL; - goto done; - } - - /* - * VM_IO marks the area as being an mmaped region for I/O to a - * device. It also prevents the region from being core dumped. - */ - vma->vm_flags |= VM_IO; - - addr = (unsigned long)queue->mem + buffer->buf.m.offset; - while (size > 0) { - page = vmalloc_to_page((void *)addr); - if ((ret = vm_insert_page(vma, start, page)) < 0) - goto done; - - start += PAGE_SIZE; - addr += PAGE_SIZE; - size -= PAGE_SIZE; - } - - vma->vm_ops = &uvc_vm_ops; - vma->vm_private_data = buffer; - uvc_vm_open(vma); - -done: - mutex_unlock(&queue->mutex); - return ret; + return uvc_queue_mmap(&stream->queue, vma); } static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait) @@ -1157,7 +1088,7 @@ const struct v4l2_file_operations uvc_fops = { .owner = THIS_MODULE, .open = uvc_v4l2_open, .release = uvc_v4l2_release, - .ioctl = uvc_v4l2_ioctl, + .unlocked_ioctl = uvc_v4l2_ioctl, .read = uvc_v4l2_read, .mmap = uvc_v4l2_mmap, .poll = uvc_v4l2_poll, diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c index 5555f0102838..5673d673504b 100644 --- a/drivers/media/video/uvc/uvc_video.c +++ b/drivers/media/video/uvc/uvc_video.c @@ -293,8 +293,6 @@ int uvc_probe_video(struct uvc_streaming *stream, unsigned int i; int ret; - mutex_lock(&stream->mutex); - /* Perform probing. The device should adjust the requested values * according to its capabilities. However, some devices, namely the * first generation UVC Logitech webcams, don't implement the Video @@ -346,7 +344,6 @@ int uvc_probe_video(struct uvc_streaming *stream, } done: - mutex_unlock(&stream->mutex); return ret; } diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h index d97cf6d6a4f9..45f01e7e13d2 100644 --- a/drivers/media/video/uvc/uvcvideo.h +++ b/drivers/media/video/uvc/uvcvideo.h @@ -436,7 +436,9 @@ struct uvc_streaming { struct uvc_streaming_control ctrl; struct uvc_format *cur_format; struct uvc_frame *cur_frame; - + /* Protect access to ctrl, cur_format, cur_frame and hardware video + * probe control. + */ struct mutex mutex; unsigned int frozen : 1; @@ -574,6 +576,8 @@ extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable); extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect); extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue, struct uvc_buffer *buf); +extern int uvc_queue_mmap(struct uvc_video_queue *queue, + struct vm_area_struct *vma); extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue, struct file *file, poll_table *wait); extern int uvc_queue_allocated(struct uvc_video_queue *queue); @@ -606,10 +610,10 @@ extern int uvc_status_suspend(struct uvc_device *dev); extern int uvc_status_resume(struct uvc_device *dev); /* Controls */ -extern struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, - __u32 v4l2_id, struct uvc_control_mapping **mapping); extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, struct v4l2_queryctrl *v4l2_ctrl); +extern int uvc_query_v4l2_menu(struct uvc_video_chain *chain, + struct v4l2_querymenu *query_menu); extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain, const struct uvc_control_mapping *mapping); diff --git a/drivers/media/video/v4l2-compat-ioctl32.c b/drivers/media/video/v4l2-compat-ioctl32.c index 86294ed35c9b..e30e8dfb6205 100644 --- a/drivers/media/video/v4l2-compat-ioctl32.c +++ b/drivers/media/video/v4l2-compat-ioctl32.c @@ -18,7 +18,6 @@ #include <linux/videodev.h> #include <linux/videodev2.h> #include <linux/module.h> -#include <linux/smp_lock.h> #include <media/v4l2-ioctl.h> #ifdef CONFIG_COMPAT diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index 03f7f4670e9b..359e23290a7e 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -186,12 +186,12 @@ static ssize_t v4l2_read(struct file *filp, char __user *buf, size_t sz, loff_t *off) { struct video_device *vdev = video_devdata(filp); - int ret = -EIO; + int ret = -ENODEV; if (!vdev->fops->read) return -EINVAL; - if (vdev->lock) - mutex_lock(vdev->lock); + if (vdev->lock && mutex_lock_interruptible(vdev->lock)) + return -ERESTARTSYS; if (video_is_registered(vdev)) ret = vdev->fops->read(filp, buf, sz, off); if (vdev->lock) @@ -203,12 +203,12 @@ static ssize_t v4l2_write(struct file *filp, const char __user *buf, size_t sz, loff_t *off) { struct video_device *vdev = video_devdata(filp); - int ret = -EIO; + int ret = -ENODEV; if (!vdev->fops->write) return -EINVAL; - if (vdev->lock) - mutex_lock(vdev->lock); + if (vdev->lock && mutex_lock_interruptible(vdev->lock)) + return -ERESTARTSYS; if (video_is_registered(vdev)) ret = vdev->fops->write(filp, buf, sz, off); if (vdev->lock) @@ -219,10 +219,10 @@ static ssize_t v4l2_write(struct file *filp, const char __user *buf, static unsigned int v4l2_poll(struct file *filp, struct poll_table_struct *poll) { struct video_device *vdev = video_devdata(filp); - int ret = DEFAULT_POLLMASK; + int ret = POLLERR | POLLHUP; if (!vdev->fops->poll) - return ret; + return DEFAULT_POLLMASK; if (vdev->lock) mutex_lock(vdev->lock); if (video_is_registered(vdev)) @@ -238,20 +238,45 @@ static long v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) int ret = -ENODEV; if (vdev->fops->unlocked_ioctl) { - if (vdev->lock) - mutex_lock(vdev->lock); + if (vdev->lock && mutex_lock_interruptible(vdev->lock)) + return -ERESTARTSYS; if (video_is_registered(vdev)) ret = vdev->fops->unlocked_ioctl(filp, cmd, arg); if (vdev->lock) mutex_unlock(vdev->lock); } else if (vdev->fops->ioctl) { - /* TODO: convert all drivers to unlocked_ioctl */ + /* This code path is a replacement for the BKL. It is a major + * hack but it will have to do for those drivers that are not + * yet converted to use unlocked_ioctl. + * + * There are two options: if the driver implements struct + * v4l2_device, then the lock defined there is used to + * serialize the ioctls. Otherwise the v4l2 core lock defined + * below is used. This lock is really bad since it serializes + * completely independent devices. + * + * Both variants suffer from the same problem: if the driver + * sleeps, then it blocks all ioctls since the lock is still + * held. This is very common for VIDIOC_DQBUF since that + * normally waits for a frame to arrive. As a result any other + * ioctl calls will proceed very, very slowly since each call + * will have to wait for the VIDIOC_QBUF to finish. Things that + * should take 0.01s may now take 10-20 seconds. + * + * The workaround is to *not* take the lock for VIDIOC_DQBUF. + * This actually works OK for videobuf-based drivers, since + * videobuf will take its own internal lock. + */ static DEFINE_MUTEX(v4l2_ioctl_mutex); + struct mutex *m = vdev->v4l2_dev ? + &vdev->v4l2_dev->ioctl_lock : &v4l2_ioctl_mutex; - mutex_lock(&v4l2_ioctl_mutex); + if (cmd != VIDIOC_DQBUF && mutex_lock_interruptible(m)) + return -ERESTARTSYS; if (video_is_registered(vdev)) ret = vdev->fops->ioctl(filp, cmd, arg); - mutex_unlock(&v4l2_ioctl_mutex); + if (cmd != VIDIOC_DQBUF) + mutex_unlock(m); } else ret = -ENOTTY; @@ -265,8 +290,8 @@ static int v4l2_mmap(struct file *filp, struct vm_area_struct *vm) if (!vdev->fops->mmap) return ret; - if (vdev->lock) - mutex_lock(vdev->lock); + if (vdev->lock && mutex_lock_interruptible(vdev->lock)) + return -ERESTARTSYS; if (video_is_registered(vdev)) ret = vdev->fops->mmap(filp, vm); if (vdev->lock) @@ -284,7 +309,7 @@ static int v4l2_open(struct inode *inode, struct file *filp) mutex_lock(&videodev_lock); vdev = video_devdata(filp); /* return ENODEV if the video device has already been removed. */ - if (vdev == NULL) { + if (vdev == NULL || !video_is_registered(vdev)) { mutex_unlock(&videodev_lock); return -ENODEV; } @@ -292,8 +317,10 @@ static int v4l2_open(struct inode *inode, struct file *filp) video_get(vdev); mutex_unlock(&videodev_lock); if (vdev->fops->open) { - if (vdev->lock) - mutex_lock(vdev->lock); + if (vdev->lock && mutex_lock_interruptible(vdev->lock)) { + ret = -ERESTARTSYS; + goto err; + } if (video_is_registered(vdev)) ret = vdev->fops->open(filp); else @@ -302,6 +329,7 @@ static int v4l2_open(struct inode *inode, struct file *filp) mutex_unlock(vdev->lock); } +err: /* decrease the refcount in case of an error */ if (ret) video_put(vdev); @@ -596,7 +624,12 @@ void video_unregister_device(struct video_device *vdev) if (!vdev || !video_is_registered(vdev)) return; + mutex_lock(&videodev_lock); + /* This must be in a critical section to prevent a race with v4l2_open. + * Once this bit has been cleared video_get may never be called again. + */ clear_bit(V4L2_FL_REGISTERED, &vdev->flags); + mutex_unlock(&videodev_lock); device_unregister(&vdev->dev); } EXPORT_SYMBOL(video_unregister_device); diff --git a/drivers/media/video/v4l2-device.c b/drivers/media/video/v4l2-device.c index 0b08f96b74a5..7fe6f92af480 100644 --- a/drivers/media/video/v4l2-device.c +++ b/drivers/media/video/v4l2-device.c @@ -35,6 +35,7 @@ int v4l2_device_register(struct device *dev, struct v4l2_device *v4l2_dev) INIT_LIST_HEAD(&v4l2_dev->subdevs); spin_lock_init(&v4l2_dev->lock); + mutex_init(&v4l2_dev->ioctl_lock); v4l2_dev->dev = dev; if (dev == NULL) { /* If dev == NULL, then name must be filled in by the caller */ diff --git a/drivers/media/video/w9966.c b/drivers/media/video/w9966.c index 635420d8d84a..019ee206cbee 100644 --- a/drivers/media/video/w9966.c +++ b/drivers/media/video/w9966.c @@ -815,7 +815,7 @@ out: static const struct v4l2_file_operations w9966_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .read = w9966_v4l_read, }; |
