From 85c675d0d09a45a135bddd15d7b385f8758c32fb Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 18 May 2024 19:35:05 +0200 Subject: Adding upstream version 6.7.7. Signed-off-by: Daniel Baumann --- drivers/media/v4l2-core/Kconfig | 16 - drivers/media/v4l2-core/Makefile | 5 - drivers/media/v4l2-core/v4l2-event.c | 2 +- drivers/media/v4l2-core/v4l2-ioctl.c | 1 + drivers/media/v4l2-core/v4l2-subdev.c | 55 +- drivers/media/v4l2-core/videobuf-core.c | 1198 ------------------------- drivers/media/v4l2-core/videobuf-dma-contig.c | 402 --------- drivers/media/v4l2-core/videobuf-dma-sg.c | 681 -------------- drivers/media/v4l2-core/videobuf-vmalloc.c | 326 ------- 9 files changed, 56 insertions(+), 2630 deletions(-) delete mode 100644 drivers/media/v4l2-core/videobuf-core.c delete mode 100644 drivers/media/v4l2-core/videobuf-dma-contig.c delete mode 100644 drivers/media/v4l2-core/videobuf-dma-sg.c delete mode 100644 drivers/media/v4l2-core/videobuf-vmalloc.c (limited to 'drivers/media/v4l2-core') diff --git a/drivers/media/v4l2-core/Kconfig b/drivers/media/v4l2-core/Kconfig index f77ebd688c..331b8e535e 100644 --- a/drivers/media/v4l2-core/Kconfig +++ b/drivers/media/v4l2-core/Kconfig @@ -82,19 +82,3 @@ config V4L2_CCI_I2C depends on I2C select REGMAP_I2C select V4L2_CCI - -# Used by drivers that need Videobuf modules -config VIDEOBUF_GEN - tristate - -config VIDEOBUF_DMA_SG - tristate - select VIDEOBUF_GEN - -config VIDEOBUF_VMALLOC - tristate - select VIDEOBUF_GEN - -config VIDEOBUF_DMA_CONTIG - tristate - select VIDEOBUF_GEN diff --git a/drivers/media/v4l2-core/Makefile b/drivers/media/v4l2-core/Makefile index be25517057..2177b9d63a 100644 --- a/drivers/media/v4l2-core/Makefile +++ b/drivers/media/v4l2-core/Makefile @@ -33,10 +33,5 @@ obj-$(CONFIG_V4L2_JPEG_HELPER) += v4l2-jpeg.o obj-$(CONFIG_V4L2_MEM2MEM_DEV) += v4l2-mem2mem.o obj-$(CONFIG_V4L2_VP9) += v4l2-vp9.o -obj-$(CONFIG_VIDEOBUF_DMA_CONTIG) += videobuf-dma-contig.o -obj-$(CONFIG_VIDEOBUF_DMA_SG) += videobuf-dma-sg.o -obj-$(CONFIG_VIDEOBUF_GEN) += videobuf-core.o -obj-$(CONFIG_VIDEOBUF_VMALLOC) += videobuf-vmalloc.o - obj-$(CONFIG_VIDEO_TUNER) += tuner.o obj-$(CONFIG_VIDEO_DEV) += v4l2-dv-timings.o videodev.o diff --git a/drivers/media/v4l2-core/v4l2-event.c b/drivers/media/v4l2-core/v4l2-event.c index c5ce9f11ad..3898ff7edd 100644 --- a/drivers/media/v4l2-core/v4l2-event.c +++ b/drivers/media/v4l2-core/v4l2-event.c @@ -238,6 +238,7 @@ int v4l2_event_subscribe(struct v4l2_fh *fh, sev = kvzalloc(struct_size(sev, events, elems), GFP_KERNEL); if (!sev) return -ENOMEM; + sev->elems = elems; for (i = 0; i < elems; i++) sev->events[i].sev = sev; sev->type = sub->type; @@ -245,7 +246,6 @@ int v4l2_event_subscribe(struct v4l2_fh *fh, sev->flags = sub->flags; sev->fh = fh; sev->ops = ops; - sev->elems = elems; mutex_lock(&fh->subscribe_lock); diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index f4d9d62790..9b1de54ce3 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -1510,6 +1510,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) case V4L2_PIX_FMT_AV1_FRAME: descr = "AV1 Frame"; break; case V4L2_PIX_FMT_MT2110T: descr = "Mediatek 10bit Tile Mode"; break; case V4L2_PIX_FMT_MT2110R: descr = "Mediatek 10bit Raster Mode"; break; + case V4L2_PIX_FMT_HEXTILE: descr = "Hextile Compressed Format"; break; default: if (fmt->description[0]) return; diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index 31752c06d1..be86b906c9 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -306,6 +307,42 @@ static int call_set_selection(struct v4l2_subdev *sd, sd->ops->pad->set_selection(sd, state, sel); } +static int call_get_frame_desc(struct v4l2_subdev *sd, unsigned int pad, + struct v4l2_mbus_frame_desc *fd) +{ + unsigned int i; + int ret; + + memset(fd, 0, sizeof(*fd)); + + ret = sd->ops->pad->get_frame_desc(sd, pad, fd); + if (ret) + return ret; + + dev_dbg(sd->dev, "Frame descriptor on pad %u, type %s\n", pad, + fd->type == V4L2_MBUS_FRAME_DESC_TYPE_PARALLEL ? "parallel" : + fd->type == V4L2_MBUS_FRAME_DESC_TYPE_CSI2 ? "CSI-2" : + "unknown"); + + for (i = 0; i < fd->num_entries; i++) { + struct v4l2_mbus_frame_desc_entry *entry = &fd->entry[i]; + char buf[20] = ""; + + if (fd->type == V4L2_MBUS_FRAME_DESC_TYPE_CSI2) + WARN_ON(snprintf(buf, sizeof(buf), + ", vc %u, dt 0x%02x", + entry->bus.csi2.vc, + entry->bus.csi2.dt) >= sizeof(buf)); + + dev_dbg(sd->dev, + "\tstream %u, code 0x%04x, length %u, flags 0x%04x%s\n", + entry->stream, entry->pixelcode, entry->length, + entry->flags, buf); + } + + return 0; +} + static inline int check_edid(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid) { @@ -359,6 +396,18 @@ static int call_s_stream(struct v4l2_subdev *sd, int enable) { int ret; + /* + * The .s_stream() operation must never be called to start or stop an + * already started or stopped subdev. Catch offenders but don't return + * an error yet to avoid regressions. + * + * As .s_stream() is mutually exclusive with the .enable_streams() and + * .disable_streams() operation, we can use the enabled_streams field + * to store the subdev streaming state. + */ + if (WARN_ON(!!sd->enabled_streams == !!enable)) + return 0; + #if IS_REACHABLE(CONFIG_LEDS_CLASS) if (!IS_ERR_OR_NULL(sd->privacy_led)) { if (enable) @@ -372,9 +421,12 @@ static int call_s_stream(struct v4l2_subdev *sd, int enable) if (!enable && ret < 0) { dev_warn(sd->dev, "disabling streaming failed (%d)\n", ret); - return 0; + ret = 0; } + if (!ret) + sd->enabled_streams = enable ? BIT(0) : 0; + return ret; } @@ -431,6 +483,7 @@ static const struct v4l2_subdev_pad_ops v4l2_subdev_call_pad_wrappers = { .set_edid = call_set_edid, .dv_timings_cap = call_dv_timings_cap, .enum_dv_timings = call_enum_dv_timings, + .get_frame_desc = call_get_frame_desc, .get_mbus_config = call_get_mbus_config, }; diff --git a/drivers/media/v4l2-core/videobuf-core.c b/drivers/media/v4l2-core/videobuf-core.c deleted file mode 100644 index 606a271bdd..0000000000 --- a/drivers/media/v4l2-core/videobuf-core.c +++ /dev/null @@ -1,1198 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * generic helper functions for handling video4linux capture buffers - * - * (c) 2007 Mauro Carvalho Chehab, - * - * Highly based on video-buf written originally by: - * (c) 2001,02 Gerd Knorr - * (c) 2006 Mauro Carvalho Chehab, - * (c) 2006 Ted Walther and John Sokol - */ - -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#define MAGIC_BUFFER 0x20070728 -#define MAGIC_CHECK(is, should) \ - do { \ - if (unlikely((is) != (should))) { \ - printk(KERN_ERR \ - "magic mismatch: %x (expected %x)\n", \ - is, should); \ - BUG(); \ - } \ - } while (0) - -static int debug; -module_param(debug, int, 0644); - -MODULE_DESCRIPTION("helper module to manage video4linux buffers"); -MODULE_AUTHOR("Mauro Carvalho Chehab "); -MODULE_LICENSE("GPL"); - -#define dprintk(level, fmt, arg...) \ - do { \ - if (debug >= level) \ - printk(KERN_DEBUG "vbuf: " fmt, ## arg); \ - } while (0) - -/* --------------------------------------------------------------------- */ - -#define CALL(q, f, arg...) \ - ((q->int_ops->f) ? q->int_ops->f(arg) : 0) -#define CALLPTR(q, f, arg...) \ - ((q->int_ops->f) ? q->int_ops->f(arg) : NULL) - -struct videobuf_buffer *videobuf_alloc_vb(struct videobuf_queue *q) -{ - struct videobuf_buffer *vb; - - BUG_ON(q->msize < sizeof(*vb)); - - if (!q->int_ops || !q->int_ops->alloc_vb) { - printk(KERN_ERR "No specific ops defined!\n"); - BUG(); - } - - vb = q->int_ops->alloc_vb(q->msize); - if (NULL != vb) { - init_waitqueue_head(&vb->done); - vb->magic = MAGIC_BUFFER; - } - - return vb; -} -EXPORT_SYMBOL_GPL(videobuf_alloc_vb); - -static int state_neither_active_nor_queued(struct videobuf_queue *q, - struct videobuf_buffer *vb) -{ - unsigned long flags; - bool rc; - - spin_lock_irqsave(q->irqlock, flags); - rc = vb->state != VIDEOBUF_ACTIVE && vb->state != VIDEOBUF_QUEUED; - spin_unlock_irqrestore(q->irqlock, flags); - return rc; -}; - -int videobuf_waiton(struct videobuf_queue *q, struct videobuf_buffer *vb, - int non_blocking, int intr) -{ - bool is_ext_locked; - int ret = 0; - - MAGIC_CHECK(vb->magic, MAGIC_BUFFER); - - if (non_blocking) { - if (state_neither_active_nor_queued(q, vb)) - return 0; - return -EAGAIN; - } - - is_ext_locked = q->ext_lock && mutex_is_locked(q->ext_lock); - - /* Release vdev lock to prevent this wait from blocking outside access to - the device. */ - if (is_ext_locked) - mutex_unlock(q->ext_lock); - if (intr) - ret = wait_event_interruptible(vb->done, - state_neither_active_nor_queued(q, vb)); - else - wait_event(vb->done, state_neither_active_nor_queued(q, vb)); - /* Relock */ - if (is_ext_locked) - mutex_lock(q->ext_lock); - - return ret; -} -EXPORT_SYMBOL_GPL(videobuf_waiton); - -int videobuf_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb, - struct v4l2_framebuffer *fbuf) -{ - MAGIC_CHECK(vb->magic, MAGIC_BUFFER); - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - return CALL(q, iolock, q, vb, fbuf); -} -EXPORT_SYMBOL_GPL(videobuf_iolock); - -void *videobuf_queue_to_vaddr(struct videobuf_queue *q, - struct videobuf_buffer *buf) -{ - if (q->int_ops->vaddr) - return q->int_ops->vaddr(buf); - return NULL; -} -EXPORT_SYMBOL_GPL(videobuf_queue_to_vaddr); - -/* --------------------------------------------------------------------- */ - - -void videobuf_queue_core_init(struct videobuf_queue *q, - const struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv, - struct videobuf_qtype_ops *int_ops, - struct mutex *ext_lock) -{ - BUG_ON(!q); - memset(q, 0, sizeof(*q)); - q->irqlock = irqlock; - q->ext_lock = ext_lock; - q->dev = dev; - q->type = type; - q->field = field; - q->msize = msize; - q->ops = ops; - q->priv_data = priv; - q->int_ops = int_ops; - - /* All buffer operations are mandatory */ - BUG_ON(!q->ops->buf_setup); - BUG_ON(!q->ops->buf_prepare); - BUG_ON(!q->ops->buf_queue); - BUG_ON(!q->ops->buf_release); - - /* Lock is mandatory for queue_cancel to work */ - BUG_ON(!irqlock); - - /* Having implementations for abstract methods are mandatory */ - BUG_ON(!q->int_ops); - - mutex_init(&q->vb_lock); - init_waitqueue_head(&q->wait); - INIT_LIST_HEAD(&q->stream); -} -EXPORT_SYMBOL_GPL(videobuf_queue_core_init); - -/* Locking: Only usage in bttv unsafe find way to remove */ -int videobuf_queue_is_busy(struct videobuf_queue *q) -{ - int i; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - if (q->streaming) { - dprintk(1, "busy: streaming active\n"); - return 1; - } - if (q->reading) { - dprintk(1, "busy: pending read #1\n"); - return 1; - } - if (q->read_buf) { - dprintk(1, "busy: pending read #2\n"); - return 1; - } - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - if (q->bufs[i]->map) { - dprintk(1, "busy: buffer #%d mapped\n", i); - return 1; - } - if (q->bufs[i]->state == VIDEOBUF_QUEUED) { - dprintk(1, "busy: buffer #%d queued\n", i); - return 1; - } - if (q->bufs[i]->state == VIDEOBUF_ACTIVE) { - dprintk(1, "busy: buffer #%d active\n", i); - return 1; - } - } - return 0; -} -EXPORT_SYMBOL_GPL(videobuf_queue_is_busy); - -/* - * __videobuf_free() - free all the buffers and their control structures - * - * This function can only be called if streaming/reading is off, i.e. no buffers - * are under control of the driver. - */ -/* Locking: Caller holds q->vb_lock */ -static int __videobuf_free(struct videobuf_queue *q) -{ - int i; - - dprintk(1, "%s\n", __func__); - if (!q) - return 0; - - if (q->streaming || q->reading) { - dprintk(1, "Cannot free buffers when streaming or reading\n"); - return -EBUSY; - } - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - for (i = 0; i < VIDEO_MAX_FRAME; i++) - if (q->bufs[i] && q->bufs[i]->map) { - dprintk(1, "Cannot free mmapped buffers\n"); - return -EBUSY; - } - - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - q->ops->buf_release(q, q->bufs[i]); - kfree(q->bufs[i]); - q->bufs[i] = NULL; - } - - return 0; -} - -/* Locking: Caller holds q->vb_lock */ -void videobuf_queue_cancel(struct videobuf_queue *q) -{ - unsigned long flags = 0; - int i; - - q->streaming = 0; - q->reading = 0; - wake_up_interruptible_sync(&q->wait); - - /* remove queued buffers from list */ - spin_lock_irqsave(q->irqlock, flags); - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - if (q->bufs[i]->state == VIDEOBUF_QUEUED) { - list_del(&q->bufs[i]->queue); - q->bufs[i]->state = VIDEOBUF_ERROR; - wake_up_all(&q->bufs[i]->done); - } - } - spin_unlock_irqrestore(q->irqlock, flags); - - /* free all buffers + clear queue */ - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - q->ops->buf_release(q, q->bufs[i]); - } - INIT_LIST_HEAD(&q->stream); -} -EXPORT_SYMBOL_GPL(videobuf_queue_cancel); - -/* --------------------------------------------------------------------- */ - -/* Locking: Caller holds q->vb_lock */ -enum v4l2_field videobuf_next_field(struct videobuf_queue *q) -{ - enum v4l2_field field = q->field; - - BUG_ON(V4L2_FIELD_ANY == field); - - if (V4L2_FIELD_ALTERNATE == field) { - if (V4L2_FIELD_TOP == q->last) { - field = V4L2_FIELD_BOTTOM; - q->last = V4L2_FIELD_BOTTOM; - } else { - field = V4L2_FIELD_TOP; - q->last = V4L2_FIELD_TOP; - } - } - return field; -} -EXPORT_SYMBOL_GPL(videobuf_next_field); - -/* Locking: Caller holds q->vb_lock */ -static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b, - struct videobuf_buffer *vb, enum v4l2_buf_type type) -{ - MAGIC_CHECK(vb->magic, MAGIC_BUFFER); - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - b->index = vb->i; - b->type = type; - - b->memory = vb->memory; - switch (b->memory) { - case V4L2_MEMORY_MMAP: - b->m.offset = vb->boff; - b->length = vb->bsize; - break; - case V4L2_MEMORY_USERPTR: - b->m.userptr = vb->baddr; - b->length = vb->bsize; - break; - case V4L2_MEMORY_OVERLAY: - b->m.offset = vb->boff; - break; - case V4L2_MEMORY_DMABUF: - /* DMABUF is not handled in videobuf framework */ - break; - } - - b->flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; - if (vb->map) - b->flags |= V4L2_BUF_FLAG_MAPPED; - - switch (vb->state) { - case VIDEOBUF_PREPARED: - case VIDEOBUF_QUEUED: - case VIDEOBUF_ACTIVE: - b->flags |= V4L2_BUF_FLAG_QUEUED; - break; - case VIDEOBUF_ERROR: - b->flags |= V4L2_BUF_FLAG_ERROR; - fallthrough; - case VIDEOBUF_DONE: - b->flags |= V4L2_BUF_FLAG_DONE; - break; - case VIDEOBUF_NEEDS_INIT: - case VIDEOBUF_IDLE: - /* nothing */ - break; - } - - b->field = vb->field; - v4l2_buffer_set_timestamp(b, vb->ts); - b->bytesused = vb->size; - b->sequence = vb->field_count >> 1; -} - -int videobuf_mmap_free(struct videobuf_queue *q) -{ - int ret; - videobuf_queue_lock(q); - ret = __videobuf_free(q); - videobuf_queue_unlock(q); - return ret; -} -EXPORT_SYMBOL_GPL(videobuf_mmap_free); - -/* Locking: Caller holds q->vb_lock */ -int __videobuf_mmap_setup(struct videobuf_queue *q, - unsigned int bcount, unsigned int bsize, - enum v4l2_memory memory) -{ - unsigned int i; - int err; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - err = __videobuf_free(q); - if (0 != err) - return err; - - /* Allocate and initialize buffers */ - for (i = 0; i < bcount; i++) { - q->bufs[i] = videobuf_alloc_vb(q); - - if (NULL == q->bufs[i]) - break; - - q->bufs[i]->i = i; - q->bufs[i]->memory = memory; - q->bufs[i]->bsize = bsize; - switch (memory) { - case V4L2_MEMORY_MMAP: - q->bufs[i]->boff = PAGE_ALIGN(bsize) * i; - break; - case V4L2_MEMORY_USERPTR: - case V4L2_MEMORY_OVERLAY: - case V4L2_MEMORY_DMABUF: - /* nothing */ - break; - } - } - - if (!i) - return -ENOMEM; - - dprintk(1, "mmap setup: %d buffers, %d bytes each\n", i, bsize); - - return i; -} -EXPORT_SYMBOL_GPL(__videobuf_mmap_setup); - -int videobuf_mmap_setup(struct videobuf_queue *q, - unsigned int bcount, unsigned int bsize, - enum v4l2_memory memory) -{ - int ret; - videobuf_queue_lock(q); - ret = __videobuf_mmap_setup(q, bcount, bsize, memory); - videobuf_queue_unlock(q); - return ret; -} -EXPORT_SYMBOL_GPL(videobuf_mmap_setup); - -int videobuf_reqbufs(struct videobuf_queue *q, - struct v4l2_requestbuffers *req) -{ - unsigned int size, count; - int retval; - - if (req->memory != V4L2_MEMORY_MMAP && - req->memory != V4L2_MEMORY_USERPTR && - req->memory != V4L2_MEMORY_OVERLAY) { - dprintk(1, "reqbufs: memory type invalid\n"); - return -EINVAL; - } - - videobuf_queue_lock(q); - if (req->type != q->type) { - dprintk(1, "reqbufs: queue type invalid\n"); - retval = -EINVAL; - goto done; - } - - if (q->streaming) { - dprintk(1, "reqbufs: streaming already exists\n"); - retval = -EBUSY; - goto done; - } - if (!list_empty(&q->stream)) { - dprintk(1, "reqbufs: stream running\n"); - retval = -EBUSY; - goto done; - } - - if (req->count == 0) { - dprintk(1, "reqbufs: count invalid (%d)\n", req->count); - retval = __videobuf_free(q); - goto done; - } - - count = req->count; - if (count > VIDEO_MAX_FRAME) - count = VIDEO_MAX_FRAME; - size = 0; - q->ops->buf_setup(q, &count, &size); - dprintk(1, "reqbufs: bufs=%d, size=0x%x [%u pages total]\n", - count, size, - (unsigned int)((count * PAGE_ALIGN(size)) >> PAGE_SHIFT)); - - retval = __videobuf_mmap_setup(q, count, size, req->memory); - if (retval < 0) { - dprintk(1, "reqbufs: mmap setup returned %d\n", retval); - goto done; - } - - req->count = retval; - retval = 0; - - done: - videobuf_queue_unlock(q); - return retval; -} -EXPORT_SYMBOL_GPL(videobuf_reqbufs); - -int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b) -{ - int ret = -EINVAL; - - videobuf_queue_lock(q); - if (unlikely(b->type != q->type)) { - dprintk(1, "querybuf: Wrong type.\n"); - goto done; - } - if (unlikely(b->index >= VIDEO_MAX_FRAME)) { - dprintk(1, "querybuf: index out of range.\n"); - goto done; - } - if (unlikely(NULL == q->bufs[b->index])) { - dprintk(1, "querybuf: buffer is null.\n"); - goto done; - } - - videobuf_status(q, b, q->bufs[b->index], q->type); - - ret = 0; -done: - videobuf_queue_unlock(q); - return ret; -} -EXPORT_SYMBOL_GPL(videobuf_querybuf); - -int videobuf_qbuf(struct videobuf_queue *q, struct v4l2_buffer *b) -{ - struct videobuf_buffer *buf; - enum v4l2_field field; - unsigned long flags = 0; - int retval; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - if (b->memory == V4L2_MEMORY_MMAP) - mmap_read_lock(current->mm); - - videobuf_queue_lock(q); - retval = -EBUSY; - if (q->reading) { - dprintk(1, "qbuf: Reading running...\n"); - goto done; - } - retval = -EINVAL; - if (b->type != q->type) { - dprintk(1, "qbuf: Wrong type.\n"); - goto done; - } - if (b->index >= VIDEO_MAX_FRAME) { - dprintk(1, "qbuf: index out of range.\n"); - goto done; - } - buf = q->bufs[b->index]; - if (NULL == buf) { - dprintk(1, "qbuf: buffer is null.\n"); - goto done; - } - MAGIC_CHECK(buf->magic, MAGIC_BUFFER); - if (buf->memory != b->memory) { - dprintk(1, "qbuf: memory type is wrong.\n"); - goto done; - } - if (buf->state != VIDEOBUF_NEEDS_INIT && buf->state != VIDEOBUF_IDLE) { - dprintk(1, "qbuf: buffer is already queued or active.\n"); - goto done; - } - - switch (b->memory) { - case V4L2_MEMORY_MMAP: - if (0 == buf->baddr) { - dprintk(1, "qbuf: mmap requested but buffer addr is zero!\n"); - goto done; - } - if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT - || q->type == V4L2_BUF_TYPE_VBI_OUTPUT - || q->type == V4L2_BUF_TYPE_SLICED_VBI_OUTPUT - || q->type == V4L2_BUF_TYPE_SDR_OUTPUT) { - buf->size = b->bytesused; - buf->field = b->field; - buf->ts = v4l2_buffer_get_timestamp(b); - } - break; - case V4L2_MEMORY_USERPTR: - if (b->length < buf->bsize) { - dprintk(1, "qbuf: buffer length is not enough\n"); - goto done; - } - if (VIDEOBUF_NEEDS_INIT != buf->state && - buf->baddr != b->m.userptr) - q->ops->buf_release(q, buf); - buf->baddr = b->m.userptr; - break; - case V4L2_MEMORY_OVERLAY: - buf->boff = b->m.offset; - break; - default: - dprintk(1, "qbuf: wrong memory type\n"); - goto done; - } - - dprintk(1, "qbuf: requesting next field\n"); - field = videobuf_next_field(q); - retval = q->ops->buf_prepare(q, buf, field); - if (0 != retval) { - dprintk(1, "qbuf: buffer_prepare returned %d\n", retval); - goto done; - } - - list_add_tail(&buf->stream, &q->stream); - if (q->streaming) { - spin_lock_irqsave(q->irqlock, flags); - q->ops->buf_queue(q, buf); - spin_unlock_irqrestore(q->irqlock, flags); - } - dprintk(1, "qbuf: succeeded\n"); - retval = 0; - wake_up_interruptible_sync(&q->wait); - -done: - videobuf_queue_unlock(q); - - if (b->memory == V4L2_MEMORY_MMAP) - mmap_read_unlock(current->mm); - - return retval; -} -EXPORT_SYMBOL_GPL(videobuf_qbuf); - -/* Locking: Caller holds q->vb_lock */ -static int stream_next_buffer_check_queue(struct videobuf_queue *q, int noblock) -{ - int retval; - -checks: - if (!q->streaming) { - dprintk(1, "next_buffer: Not streaming\n"); - retval = -EINVAL; - goto done; - } - - if (list_empty(&q->stream)) { - if (noblock) { - retval = -EAGAIN; - dprintk(2, "next_buffer: no buffers to dequeue\n"); - goto done; - } else { - dprintk(2, "next_buffer: waiting on buffer\n"); - - /* Drop lock to avoid deadlock with qbuf */ - videobuf_queue_unlock(q); - - /* Checking list_empty and streaming is safe without - * locks because we goto checks to validate while - * holding locks before proceeding */ - retval = wait_event_interruptible(q->wait, - !list_empty(&q->stream) || !q->streaming); - videobuf_queue_lock(q); - - if (retval) - goto done; - - goto checks; - } - } - - retval = 0; - -done: - return retval; -} - -/* Locking: Caller holds q->vb_lock */ -static int stream_next_buffer(struct videobuf_queue *q, - struct videobuf_buffer **vb, int nonblocking) -{ - int retval; - struct videobuf_buffer *buf = NULL; - - retval = stream_next_buffer_check_queue(q, nonblocking); - if (retval) - goto done; - - buf = list_entry(q->stream.next, struct videobuf_buffer, stream); - retval = videobuf_waiton(q, buf, nonblocking, 1); - if (retval < 0) - goto done; - - *vb = buf; -done: - return retval; -} - -int videobuf_dqbuf(struct videobuf_queue *q, - struct v4l2_buffer *b, int nonblocking) -{ - struct videobuf_buffer *buf = NULL; - int retval; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - memset(b, 0, sizeof(*b)); - videobuf_queue_lock(q); - - retval = stream_next_buffer(q, &buf, nonblocking); - if (retval < 0) { - dprintk(1, "dqbuf: next_buffer error: %i\n", retval); - goto done; - } - - switch (buf->state) { - case VIDEOBUF_ERROR: - dprintk(1, "dqbuf: state is error\n"); - break; - case VIDEOBUF_DONE: - dprintk(1, "dqbuf: state is done\n"); - break; - default: - dprintk(1, "dqbuf: state invalid\n"); - retval = -EINVAL; - goto done; - } - CALL(q, sync, q, buf); - videobuf_status(q, b, buf, q->type); - list_del(&buf->stream); - buf->state = VIDEOBUF_IDLE; - b->flags &= ~V4L2_BUF_FLAG_DONE; -done: - videobuf_queue_unlock(q); - return retval; -} -EXPORT_SYMBOL_GPL(videobuf_dqbuf); - -int videobuf_streamon(struct videobuf_queue *q) -{ - struct videobuf_buffer *buf; - unsigned long flags = 0; - int retval; - - videobuf_queue_lock(q); - retval = -EBUSY; - if (q->reading) - goto done; - retval = 0; - if (q->streaming) - goto done; - q->streaming = 1; - spin_lock_irqsave(q->irqlock, flags); - list_for_each_entry(buf, &q->stream, stream) - if (buf->state == VIDEOBUF_PREPARED) - q->ops->buf_queue(q, buf); - spin_unlock_irqrestore(q->irqlock, flags); - - wake_up_interruptible_sync(&q->wait); -done: - videobuf_queue_unlock(q); - return retval; -} -EXPORT_SYMBOL_GPL(videobuf_streamon); - -/* Locking: Caller holds q->vb_lock */ -static int __videobuf_streamoff(struct videobuf_queue *q) -{ - if (!q->streaming) - return -EINVAL; - - videobuf_queue_cancel(q); - - return 0; -} - -int videobuf_streamoff(struct videobuf_queue *q) -{ - int retval; - - videobuf_queue_lock(q); - retval = __videobuf_streamoff(q); - videobuf_queue_unlock(q); - - return retval; -} -EXPORT_SYMBOL_GPL(videobuf_streamoff); - -/* Locking: Caller holds q->vb_lock */ -static ssize_t videobuf_read_zerocopy(struct videobuf_queue *q, - char __user *data, - size_t count, loff_t *ppos) -{ - enum v4l2_field field; - unsigned long flags = 0; - int retval; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - /* setup stuff */ - q->read_buf = videobuf_alloc_vb(q); - if (NULL == q->read_buf) - return -ENOMEM; - - q->read_buf->memory = V4L2_MEMORY_USERPTR; - q->read_buf->baddr = (unsigned long)data; - q->read_buf->bsize = count; - - field = videobuf_next_field(q); - retval = q->ops->buf_prepare(q, q->read_buf, field); - if (0 != retval) - goto done; - - /* start capture & wait */ - spin_lock_irqsave(q->irqlock, flags); - q->ops->buf_queue(q, q->read_buf); - spin_unlock_irqrestore(q->irqlock, flags); - retval = videobuf_waiton(q, q->read_buf, 0, 0); - if (0 == retval) { - CALL(q, sync, q, q->read_buf); - if (VIDEOBUF_ERROR == q->read_buf->state) - retval = -EIO; - else - retval = q->read_buf->size; - } - -done: - /* cleanup */ - q->ops->buf_release(q, q->read_buf); - kfree(q->read_buf); - q->read_buf = NULL; - return retval; -} - -static int __videobuf_copy_to_user(struct videobuf_queue *q, - struct videobuf_buffer *buf, - char __user *data, size_t count, - int nonblocking) -{ - void *vaddr = CALLPTR(q, vaddr, buf); - - /* copy to userspace */ - if (count > buf->size - q->read_off) - count = buf->size - q->read_off; - - if (copy_to_user(data, vaddr + q->read_off, count)) - return -EFAULT; - - return count; -} - -static int __videobuf_copy_stream(struct videobuf_queue *q, - struct videobuf_buffer *buf, - char __user *data, size_t count, size_t pos, - int vbihack, int nonblocking) -{ - unsigned int *fc = CALLPTR(q, vaddr, buf); - - if (vbihack) { - /* dirty, undocumented hack -- pass the frame counter - * within the last four bytes of each vbi data block. - * We need that one to maintain backward compatibility - * to all vbi decoding software out there ... */ - fc += (buf->size >> 2) - 1; - *fc = buf->field_count >> 1; - dprintk(1, "vbihack: %d\n", *fc); - } - - /* copy stuff using the common method */ - count = __videobuf_copy_to_user(q, buf, data, count, nonblocking); - - if ((count == -EFAULT) && (pos == 0)) - return -EFAULT; - - return count; -} - -ssize_t videobuf_read_one(struct videobuf_queue *q, - char __user *data, size_t count, loff_t *ppos, - int nonblocking) -{ - enum v4l2_field field; - unsigned long flags = 0; - unsigned size = 0, nbufs = 1; - int retval; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - videobuf_queue_lock(q); - - q->ops->buf_setup(q, &nbufs, &size); - - if (NULL == q->read_buf && - count >= size && - !nonblocking) { - retval = videobuf_read_zerocopy(q, data, count, ppos); - if (retval >= 0 || retval == -EIO) - /* ok, all done */ - goto done; - /* fallback to kernel bounce buffer on failures */ - } - - if (NULL == q->read_buf) { - /* need to capture a new frame */ - retval = -ENOMEM; - q->read_buf = videobuf_alloc_vb(q); - - dprintk(1, "video alloc=0x%p\n", q->read_buf); - if (NULL == q->read_buf) - goto done; - q->read_buf->memory = V4L2_MEMORY_USERPTR; - q->read_buf->bsize = count; /* preferred size */ - field = videobuf_next_field(q); - retval = q->ops->buf_prepare(q, q->read_buf, field); - - if (0 != retval) { - kfree(q->read_buf); - q->read_buf = NULL; - goto done; - } - - spin_lock_irqsave(q->irqlock, flags); - q->ops->buf_queue(q, q->read_buf); - spin_unlock_irqrestore(q->irqlock, flags); - - q->read_off = 0; - } - - /* wait until capture is done */ - retval = videobuf_waiton(q, q->read_buf, nonblocking, 1); - if (0 != retval) - goto done; - - CALL(q, sync, q, q->read_buf); - - if (VIDEOBUF_ERROR == q->read_buf->state) { - /* catch I/O errors */ - q->ops->buf_release(q, q->read_buf); - kfree(q->read_buf); - q->read_buf = NULL; - retval = -EIO; - goto done; - } - - /* Copy to userspace */ - retval = __videobuf_copy_to_user(q, q->read_buf, data, count, nonblocking); - if (retval < 0) - goto done; - - q->read_off += retval; - if (q->read_off == q->read_buf->size) { - /* all data copied, cleanup */ - q->ops->buf_release(q, q->read_buf); - kfree(q->read_buf); - q->read_buf = NULL; - } - -done: - videobuf_queue_unlock(q); - return retval; -} -EXPORT_SYMBOL_GPL(videobuf_read_one); - -/* Locking: Caller holds q->vb_lock */ -static int __videobuf_read_start(struct videobuf_queue *q) -{ - enum v4l2_field field; - unsigned long flags = 0; - unsigned int count = 0, size = 0; - int err, i; - - q->ops->buf_setup(q, &count, &size); - if (count < 2) - count = 2; - if (count > VIDEO_MAX_FRAME) - count = VIDEO_MAX_FRAME; - size = PAGE_ALIGN(size); - - err = __videobuf_mmap_setup(q, count, size, V4L2_MEMORY_USERPTR); - if (err < 0) - return err; - - count = err; - - for (i = 0; i < count; i++) { - field = videobuf_next_field(q); - err = q->ops->buf_prepare(q, q->bufs[i], field); - if (err) - return err; - list_add_tail(&q->bufs[i]->stream, &q->stream); - } - spin_lock_irqsave(q->irqlock, flags); - for (i = 0; i < count; i++) - q->ops->buf_queue(q, q->bufs[i]); - spin_unlock_irqrestore(q->irqlock, flags); - q->reading = 1; - return 0; -} - -static void __videobuf_read_stop(struct videobuf_queue *q) -{ - int i; - - videobuf_queue_cancel(q); - __videobuf_free(q); - INIT_LIST_HEAD(&q->stream); - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - kfree(q->bufs[i]); - q->bufs[i] = NULL; - } - q->read_buf = NULL; -} - -int videobuf_read_start(struct videobuf_queue *q) -{ - int rc; - - videobuf_queue_lock(q); - rc = __videobuf_read_start(q); - videobuf_queue_unlock(q); - - return rc; -} -EXPORT_SYMBOL_GPL(videobuf_read_start); - -void videobuf_read_stop(struct videobuf_queue *q) -{ - videobuf_queue_lock(q); - __videobuf_read_stop(q); - videobuf_queue_unlock(q); -} -EXPORT_SYMBOL_GPL(videobuf_read_stop); - -void videobuf_stop(struct videobuf_queue *q) -{ - videobuf_queue_lock(q); - - if (q->streaming) - __videobuf_streamoff(q); - - if (q->reading) - __videobuf_read_stop(q); - - videobuf_queue_unlock(q); -} -EXPORT_SYMBOL_GPL(videobuf_stop); - -ssize_t videobuf_read_stream(struct videobuf_queue *q, - char __user *data, size_t count, loff_t *ppos, - int vbihack, int nonblocking) -{ - int rc, retval; - unsigned long flags = 0; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - dprintk(2, "%s\n", __func__); - videobuf_queue_lock(q); - retval = -EBUSY; - if (q->streaming) - goto done; - if (!q->reading) { - retval = __videobuf_read_start(q); - if (retval < 0) - goto done; - } - - retval = 0; - while (count > 0) { - /* get / wait for data */ - if (NULL == q->read_buf) { - q->read_buf = list_entry(q->stream.next, - struct videobuf_buffer, - stream); - list_del(&q->read_buf->stream); - q->read_off = 0; - } - rc = videobuf_waiton(q, q->read_buf, nonblocking, 1); - if (rc < 0) { - if (0 == retval) - retval = rc; - break; - } - - if (q->read_buf->state == VIDEOBUF_DONE) { - rc = __videobuf_copy_stream(q, q->read_buf, data + retval, count, - retval, vbihack, nonblocking); - if (rc < 0) { - retval = rc; - break; - } - retval += rc; - count -= rc; - q->read_off += rc; - } else { - /* some error */ - q->read_off = q->read_buf->size; - if (0 == retval) - retval = -EIO; - } - - /* requeue buffer when done with copying */ - if (q->read_off == q->read_buf->size) { - list_add_tail(&q->read_buf->stream, - &q->stream); - spin_lock_irqsave(q->irqlock, flags); - q->ops->buf_queue(q, q->read_buf); - spin_unlock_irqrestore(q->irqlock, flags); - q->read_buf = NULL; - } - if (retval < 0) - break; - } - -done: - videobuf_queue_unlock(q); - return retval; -} -EXPORT_SYMBOL_GPL(videobuf_read_stream); - -__poll_t videobuf_poll_stream(struct file *file, - struct videobuf_queue *q, - poll_table *wait) -{ - __poll_t req_events = poll_requested_events(wait); - struct videobuf_buffer *buf = NULL; - __poll_t rc = 0; - - videobuf_queue_lock(q); - if (q->streaming) { - if (!list_empty(&q->stream)) - buf = list_entry(q->stream.next, - struct videobuf_buffer, stream); - } else if (req_events & (EPOLLIN | EPOLLRDNORM)) { - if (!q->reading) - __videobuf_read_start(q); - if (!q->reading) { - rc = EPOLLERR; - } else if (NULL == q->read_buf) { - q->read_buf = list_entry(q->stream.next, - struct videobuf_buffer, - stream); - list_del(&q->read_buf->stream); - q->read_off = 0; - } - buf = q->read_buf; - } - if (buf) - poll_wait(file, &buf->done, wait); - else - rc = EPOLLERR; - - if (0 == rc) { - if (buf->state == VIDEOBUF_DONE || - buf->state == VIDEOBUF_ERROR) { - switch (q->type) { - case V4L2_BUF_TYPE_VIDEO_OUTPUT: - case V4L2_BUF_TYPE_VBI_OUTPUT: - case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: - case V4L2_BUF_TYPE_SDR_OUTPUT: - rc = EPOLLOUT | EPOLLWRNORM; - break; - default: - rc = EPOLLIN | EPOLLRDNORM; - break; - } - } - } - videobuf_queue_unlock(q); - return rc; -} -EXPORT_SYMBOL_GPL(videobuf_poll_stream); - -int videobuf_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma) -{ - int rc = -EINVAL; - int i; - - MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS); - - if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED)) { - dprintk(1, "mmap appl bug: PROT_WRITE and MAP_SHARED are required\n"); - return -EINVAL; - } - - videobuf_queue_lock(q); - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - struct videobuf_buffer *buf = q->bufs[i]; - - if (buf && buf->memory == V4L2_MEMORY_MMAP && - buf->boff == (vma->vm_pgoff << PAGE_SHIFT)) { - rc = CALL(q, mmap_mapper, q, buf, vma); - break; - } - } - videobuf_queue_unlock(q); - - return rc; -} -EXPORT_SYMBOL_GPL(videobuf_mmap_mapper); diff --git a/drivers/media/v4l2-core/videobuf-dma-contig.c b/drivers/media/v4l2-core/videobuf-dma-contig.c deleted file mode 100644 index 4c2ec7a0d8..0000000000 --- a/drivers/media/v4l2-core/videobuf-dma-contig.c +++ /dev/null @@ -1,402 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * helper functions for physically contiguous capture buffers - * - * The functions support hardware lacking scatter gather support - * (i.e. the buffers must be linear in physical memory) - * - * Copyright (c) 2008 Magnus Damm - * - * Based on videobuf-vmalloc.c, - * (c) 2007 Mauro Carvalho Chehab, - */ - -#include -#include -#include -#include -#include -#include -#include -#include - -struct videobuf_dma_contig_memory { - u32 magic; - void *vaddr; - dma_addr_t dma_handle; - unsigned long size; -}; - -#define MAGIC_DC_MEM 0x0733ac61 -#define MAGIC_CHECK(is, should) \ - if (unlikely((is) != (should))) { \ - pr_err("magic mismatch: %x expected %x\n", (is), (should)); \ - BUG(); \ - } - -static int __videobuf_dc_alloc(struct device *dev, - struct videobuf_dma_contig_memory *mem, - unsigned long size) -{ - mem->size = size; - mem->vaddr = dma_alloc_coherent(dev, mem->size, &mem->dma_handle, - GFP_KERNEL); - if (!mem->vaddr) { - dev_err(dev, "memory alloc size %ld failed\n", mem->size); - return -ENOMEM; - } - - dev_dbg(dev, "dma mapped data is at %p (%ld)\n", mem->vaddr, mem->size); - - return 0; -} - -static void __videobuf_dc_free(struct device *dev, - struct videobuf_dma_contig_memory *mem) -{ - dma_free_coherent(dev, mem->size, mem->vaddr, mem->dma_handle); - - mem->vaddr = NULL; -} - -static void videobuf_vm_open(struct vm_area_struct *vma) -{ - struct videobuf_mapping *map = vma->vm_private_data; - - dev_dbg(map->q->dev, "vm_open %p [count=%u,vma=%08lx-%08lx]\n", - map, map->count, vma->vm_start, vma->vm_end); - - map->count++; -} - -static void videobuf_vm_close(struct vm_area_struct *vma) -{ - struct videobuf_mapping *map = vma->vm_private_data; - struct videobuf_queue *q = map->q; - int i; - - dev_dbg(q->dev, "vm_close %p [count=%u,vma=%08lx-%08lx]\n", - map, map->count, vma->vm_start, vma->vm_end); - - map->count--; - if (0 == map->count) { - struct videobuf_dma_contig_memory *mem; - - dev_dbg(q->dev, "munmap %p q=%p\n", map, q); - videobuf_queue_lock(q); - - /* We need first to cancel streams, before unmapping */ - if (q->streaming) - videobuf_queue_cancel(q); - - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - - if (q->bufs[i]->map != map) - continue; - - mem = q->bufs[i]->priv; - if (mem) { - /* This callback is called only if kernel has - allocated memory and this memory is mmapped. - In this case, memory should be freed, - in order to do memory unmap. - */ - - MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); - - /* vfree is not atomic - can't be - called with IRQ's disabled - */ - dev_dbg(q->dev, "buf[%d] freeing %p\n", - i, mem->vaddr); - - __videobuf_dc_free(q->dev, mem); - mem->vaddr = NULL; - } - - q->bufs[i]->map = NULL; - q->bufs[i]->baddr = 0; - } - - kfree(map); - - videobuf_queue_unlock(q); - } -} - -static const struct vm_operations_struct videobuf_vm_ops = { - .open = videobuf_vm_open, - .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->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) -{ - unsigned long untagged_baddr = untagged_addr(vb->baddr); - struct mm_struct *mm = current->mm; - struct vm_area_struct *vma; - unsigned long prev_pfn, this_pfn; - unsigned long pages_done, user_address; - unsigned int offset; - int ret; - - offset = untagged_baddr & ~PAGE_MASK; - mem->size = PAGE_ALIGN(vb->size + offset); - ret = -EINVAL; - - mmap_read_lock(mm); - - vma = find_vma(mm, untagged_baddr); - if (!vma) - goto out_up; - - if ((untagged_baddr + mem->size) > vma->vm_end) - goto out_up; - - pages_done = 0; - prev_pfn = 0; /* kill warning */ - user_address = untagged_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) + offset; - else if (this_pfn != (prev_pfn + 1)) - ret = -EFAULT; - - if (ret) - break; - - prev_pfn = this_pfn; - user_address += PAGE_SIZE; - pages_done++; - } - -out_up: - mmap_read_unlock(current->mm); - - return ret; -} - -static struct videobuf_buffer *__videobuf_alloc(size_t size) -{ - struct videobuf_dma_contig_memory *mem; - struct videobuf_buffer *vb; - - vb = kzalloc(size + sizeof(*mem), GFP_KERNEL); - if (vb) { - vb->priv = ((char *)vb) + size; - mem = vb->priv; - mem->magic = MAGIC_DC_MEM; - } - - return vb; -} - -static void *__videobuf_to_vaddr(struct videobuf_buffer *buf) -{ - struct videobuf_dma_contig_memory *mem = buf->priv; - - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); - - return mem->vaddr; -} - -static int __videobuf_iolock(struct videobuf_queue *q, - struct videobuf_buffer *vb, - struct v4l2_framebuffer *fbuf) -{ - struct videobuf_dma_contig_memory *mem = vb->priv; - - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); - - switch (vb->memory) { - case V4L2_MEMORY_MMAP: - dev_dbg(q->dev, "%s memory method MMAP\n", __func__); - - /* All handling should be done by __videobuf_mmap_mapper() */ - if (!mem->vaddr) { - dev_err(q->dev, "memory is not allocated/mmapped.\n"); - return -EINVAL; - } - break; - case V4L2_MEMORY_USERPTR: - dev_dbg(q->dev, "%s memory method USERPTR\n", __func__); - - /* handle pointer from user space */ - if (vb->baddr) - return videobuf_dma_contig_user_get(mem, vb); - - /* allocate memory for the read() method */ - if (__videobuf_dc_alloc(q->dev, mem, PAGE_ALIGN(vb->size))) - return -ENOMEM; - break; - case V4L2_MEMORY_OVERLAY: - default: - dev_dbg(q->dev, "%s memory method OVERLAY/unknown\n", __func__); - return -EINVAL; - } - - return 0; -} - -static int __videobuf_mmap_mapper(struct videobuf_queue *q, - struct videobuf_buffer *buf, - struct vm_area_struct *vma) -{ - struct videobuf_dma_contig_memory *mem; - struct videobuf_mapping *map; - int retval; - - dev_dbg(q->dev, "%s\n", __func__); - - /* create mapping + update buffer list */ - map = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL); - if (!map) - return -ENOMEM; - - buf->map = map; - map->q = q; - - buf->baddr = vma->vm_start; - - mem = buf->priv; - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); - - if (__videobuf_dc_alloc(q->dev, mem, PAGE_ALIGN(buf->bsize))) - goto error; - - /* the "vm_pgoff" is just used in v4l2 to find the - * corresponding buffer data structure which is allocated - * earlier and it does not mean the offset from the physical - * buffer start address as usual. So set it to 0 to pass - * the sanity check in dma_mmap_coherent(). - */ - vma->vm_pgoff = 0; - retval = dma_mmap_coherent(q->dev, vma, mem->vaddr, mem->dma_handle, - mem->size); - if (retval) { - dev_err(q->dev, "mmap: remap failed with error %d. ", - retval); - dma_free_coherent(q->dev, mem->size, - mem->vaddr, mem->dma_handle); - goto error; - } - - vma->vm_ops = &videobuf_vm_ops; - vm_flags_set(vma, VM_DONTEXPAND); - vma->vm_private_data = map; - - dev_dbg(q->dev, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n", - map, q, vma->vm_start, vma->vm_end, - (long int)buf->bsize, vma->vm_pgoff, buf->i); - - videobuf_vm_open(vma); - - return 0; - -error: - kfree(map); - return -ENOMEM; -} - -static struct videobuf_qtype_ops qops = { - .magic = MAGIC_QTYPE_OPS, - .alloc_vb = __videobuf_alloc, - .iolock = __videobuf_iolock, - .mmap_mapper = __videobuf_mmap_mapper, - .vaddr = __videobuf_to_vaddr, -}; - -void videobuf_queue_dma_contig_init(struct videobuf_queue *q, - const struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv, - struct mutex *ext_lock) -{ - videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize, - priv, &qops, ext_lock); -} -EXPORT_SYMBOL_GPL(videobuf_queue_dma_contig_init); - -dma_addr_t videobuf_to_dma_contig(struct videobuf_buffer *buf) -{ - struct videobuf_dma_contig_memory *mem = buf->priv; - - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); - - return mem->dma_handle; -} -EXPORT_SYMBOL_GPL(videobuf_to_dma_contig); - -void videobuf_dma_contig_free(struct videobuf_queue *q, - struct videobuf_buffer *buf) -{ - struct videobuf_dma_contig_memory *mem = buf->priv; - - /* mmapped memory can't be freed here, otherwise mmapped region - would be released, while still needed. In this case, the memory - release should happen inside videobuf_vm_close(). - So, it should free memory only if the memory were allocated for - read() operation. - */ - if (buf->memory != V4L2_MEMORY_USERPTR) - return; - - if (!mem) - return; - - MAGIC_CHECK(mem->magic, MAGIC_DC_MEM); - - /* handle user space pointer case */ - if (buf->baddr) { - videobuf_dma_contig_user_put(mem); - return; - } - - /* read() method */ - if (mem->vaddr) { - __videobuf_dc_free(q->dev, mem); - mem->vaddr = NULL; - } -} -EXPORT_SYMBOL_GPL(videobuf_dma_contig_free); - -MODULE_DESCRIPTION("helper module to manage video4linux dma contig buffers"); -MODULE_AUTHOR("Magnus Damm"); -MODULE_LICENSE("GPL"); diff --git a/drivers/media/v4l2-core/videobuf-dma-sg.c b/drivers/media/v4l2-core/videobuf-dma-sg.c deleted file mode 100644 index 405b89ea10..0000000000 --- a/drivers/media/v4l2-core/videobuf-dma-sg.c +++ /dev/null @@ -1,681 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * helper functions for SG DMA video4linux capture buffers - * - * The functions expect the hardware being able to scatter gather - * (i.e. the buffers are not linear in physical memory, but fragmented - * into PAGE_SIZE chunks). They also assume the driver does not need - * to touch the video data. - * - * (c) 2007 Mauro Carvalho Chehab, - * - * Highly based on video-buf written originally by: - * (c) 2001,02 Gerd Knorr - * (c) 2006 Mauro Carvalho Chehab, - * (c) 2006 Ted Walther and John Sokol - */ - -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include - -#include - -#define MAGIC_DMABUF 0x19721112 -#define MAGIC_SG_MEM 0x17890714 - -#define MAGIC_CHECK(is, should) \ - if (unlikely((is) != (should))) { \ - printk(KERN_ERR "magic mismatch: %x (expected %x)\n", \ - is, should); \ - BUG(); \ - } - -static int debug; -module_param(debug, int, 0644); - -MODULE_DESCRIPTION("helper module to manage video4linux dma sg buffers"); -MODULE_AUTHOR("Mauro Carvalho Chehab "); -MODULE_LICENSE("GPL"); - -#define dprintk(level, fmt, arg...) \ - if (debug >= level) \ - printk(KERN_DEBUG "vbuf-sg: " fmt , ## arg) - -/* --------------------------------------------------------------------- */ - -/* - * Return a scatterlist for some page-aligned vmalloc()'ed memory - * block (NULL on errors). Memory for the scatterlist is allocated - * using kmalloc. The caller must free the memory. - */ -static struct scatterlist *videobuf_vmalloc_to_sg(unsigned char *virt, - int nr_pages) -{ - struct scatterlist *sglist; - struct page *pg; - int i; - - sglist = vzalloc(array_size(nr_pages, sizeof(*sglist))); - if (NULL == sglist) - return NULL; - sg_init_table(sglist, nr_pages); - for (i = 0; i < nr_pages; i++, virt += PAGE_SIZE) { - pg = vmalloc_to_page(virt); - if (NULL == pg) - goto err; - BUG_ON(PageHighMem(pg)); - sg_set_page(&sglist[i], pg, PAGE_SIZE, 0); - } - return sglist; - -err: - vfree(sglist); - return NULL; -} - -/* - * Return a scatterlist for a an array of userpages (NULL on errors). - * Memory for the scatterlist is allocated using kmalloc. The caller - * must free the memory. - */ -static struct scatterlist *videobuf_pages_to_sg(struct page **pages, - int nr_pages, int offset, size_t size) -{ - struct scatterlist *sglist; - int i; - - if (NULL == pages[0]) - return NULL; - sglist = vmalloc(array_size(nr_pages, sizeof(*sglist))); - if (NULL == sglist) - return NULL; - sg_init_table(sglist, nr_pages); - - if (PageHighMem(pages[0])) - /* DMA to highmem pages might not work */ - goto highmem; - sg_set_page(&sglist[0], pages[0], - min_t(size_t, PAGE_SIZE - offset, size), offset); - size -= min_t(size_t, PAGE_SIZE - offset, size); - for (i = 1; i < nr_pages; i++) { - if (NULL == pages[i]) - goto nopage; - if (PageHighMem(pages[i])) - goto highmem; - sg_set_page(&sglist[i], pages[i], min_t(size_t, PAGE_SIZE, size), 0); - size -= min_t(size_t, PAGE_SIZE, size); - } - return sglist; - -nopage: - dprintk(2, "sgl: oops - no page\n"); - vfree(sglist); - return NULL; - -highmem: - dprintk(2, "sgl: oops - highmem page\n"); - vfree(sglist); - return NULL; -} - -/* --------------------------------------------------------------------- */ - -struct videobuf_dmabuf *videobuf_to_dma(struct videobuf_buffer *buf) -{ - struct videobuf_dma_sg_memory *mem = buf->priv; - BUG_ON(!mem); - - MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); - - return &mem->dma; -} -EXPORT_SYMBOL_GPL(videobuf_to_dma); - -static void videobuf_dma_init(struct videobuf_dmabuf *dma) -{ - memset(dma, 0, sizeof(*dma)); - dma->magic = MAGIC_DMABUF; -} - -static int videobuf_dma_init_user_locked(struct videobuf_dmabuf *dma, - int direction, unsigned long data, unsigned long size) -{ - unsigned int gup_flags = FOLL_LONGTERM; - unsigned long first, last; - int err; - - dma->direction = direction; - switch (dma->direction) { - case DMA_FROM_DEVICE: - gup_flags |= FOLL_WRITE; - break; - case DMA_TO_DEVICE: - break; - default: - BUG(); - } - - first = (data & PAGE_MASK) >> PAGE_SHIFT; - last = ((data+size-1) & PAGE_MASK) >> PAGE_SHIFT; - dma->offset = data & ~PAGE_MASK; - dma->size = size; - dma->nr_pages = last-first+1; - dma->pages = kmalloc_array(dma->nr_pages, sizeof(struct page *), - GFP_KERNEL); - if (NULL == dma->pages) - return -ENOMEM; - - dprintk(1, "init user [0x%lx+0x%lx => %lu pages]\n", - data, size, dma->nr_pages); - - err = pin_user_pages(data & PAGE_MASK, dma->nr_pages, gup_flags, - dma->pages); - - if (err != dma->nr_pages) { - dma->nr_pages = (err >= 0) ? err : 0; - dprintk(1, "pin_user_pages: err=%d [%lu]\n", err, - dma->nr_pages); - return err < 0 ? err : -EINVAL; - } - return 0; -} - -static int videobuf_dma_init_user(struct videobuf_dmabuf *dma, int direction, - unsigned long data, unsigned long size) -{ - int ret; - - mmap_read_lock(current->mm); - ret = videobuf_dma_init_user_locked(dma, direction, data, size); - mmap_read_unlock(current->mm); - - return ret; -} - -static int videobuf_dma_init_kernel(struct videobuf_dmabuf *dma, int direction, - unsigned long nr_pages) -{ - int i; - - dprintk(1, "init kernel [%lu pages]\n", nr_pages); - - dma->direction = direction; - dma->vaddr_pages = kcalloc(nr_pages, sizeof(*dma->vaddr_pages), - GFP_KERNEL); - if (!dma->vaddr_pages) - return -ENOMEM; - - dma->dma_addr = kcalloc(nr_pages, sizeof(*dma->dma_addr), GFP_KERNEL); - if (!dma->dma_addr) { - kfree(dma->vaddr_pages); - return -ENOMEM; - } - for (i = 0; i < nr_pages; i++) { - void *addr; - - addr = dma_alloc_coherent(dma->dev, PAGE_SIZE, - &(dma->dma_addr[i]), GFP_KERNEL); - if (addr == NULL) - goto out_free_pages; - - dma->vaddr_pages[i] = virt_to_page(addr); - } - dma->vaddr = vmap(dma->vaddr_pages, nr_pages, VM_MAP | VM_IOREMAP, - PAGE_KERNEL); - if (NULL == dma->vaddr) { - dprintk(1, "vmalloc_32(%lu pages) failed\n", nr_pages); - goto out_free_pages; - } - - dprintk(1, "vmalloc is at addr %p, size=%lu\n", - dma->vaddr, nr_pages << PAGE_SHIFT); - - memset(dma->vaddr, 0, nr_pages << PAGE_SHIFT); - dma->nr_pages = nr_pages; - - return 0; -out_free_pages: - while (i > 0) { - void *addr; - - i--; - addr = page_address(dma->vaddr_pages[i]); - dma_free_coherent(dma->dev, PAGE_SIZE, addr, dma->dma_addr[i]); - } - kfree(dma->dma_addr); - dma->dma_addr = NULL; - kfree(dma->vaddr_pages); - dma->vaddr_pages = NULL; - - return -ENOMEM; - -} - -static int videobuf_dma_init_overlay(struct videobuf_dmabuf *dma, int direction, - dma_addr_t addr, unsigned long nr_pages) -{ - dprintk(1, "init overlay [%lu pages @ bus 0x%lx]\n", - nr_pages, (unsigned long)addr); - dma->direction = direction; - - if (0 == addr) - return -EINVAL; - - dma->bus_addr = addr; - dma->nr_pages = nr_pages; - - return 0; -} - -static int videobuf_dma_map(struct device *dev, struct videobuf_dmabuf *dma) -{ - MAGIC_CHECK(dma->magic, MAGIC_DMABUF); - BUG_ON(0 == dma->nr_pages); - - if (dma->pages) { - dma->sglist = videobuf_pages_to_sg(dma->pages, dma->nr_pages, - dma->offset, dma->size); - } - if (dma->vaddr) { - dma->sglist = videobuf_vmalloc_to_sg(dma->vaddr, - dma->nr_pages); - } - if (dma->bus_addr) { - dma->sglist = vmalloc(sizeof(*dma->sglist)); - if (NULL != dma->sglist) { - dma->sglen = 1; - sg_dma_address(&dma->sglist[0]) = dma->bus_addr - & PAGE_MASK; - dma->sglist[0].offset = dma->bus_addr & ~PAGE_MASK; - sg_dma_len(&dma->sglist[0]) = dma->nr_pages * PAGE_SIZE; - } - } - if (NULL == dma->sglist) { - dprintk(1, "scatterlist is NULL\n"); - return -ENOMEM; - } - if (!dma->bus_addr) { - dma->sglen = dma_map_sg(dev, dma->sglist, - dma->nr_pages, dma->direction); - if (0 == dma->sglen) { - printk(KERN_WARNING - "%s: videobuf_map_sg failed\n", __func__); - vfree(dma->sglist); - dma->sglist = NULL; - dma->sglen = 0; - return -ENOMEM; - } - } - - return 0; -} - -int videobuf_dma_unmap(struct device *dev, struct videobuf_dmabuf *dma) -{ - MAGIC_CHECK(dma->magic, MAGIC_DMABUF); - - if (!dma->sglen) - return 0; - - dma_unmap_sg(dev, dma->sglist, dma->nr_pages, dma->direction); - - vfree(dma->sglist); - dma->sglist = NULL; - dma->sglen = 0; - - return 0; -} -EXPORT_SYMBOL_GPL(videobuf_dma_unmap); - -int videobuf_dma_free(struct videobuf_dmabuf *dma) -{ - int i; - MAGIC_CHECK(dma->magic, MAGIC_DMABUF); - BUG_ON(dma->sglen); - - if (dma->pages) { - unpin_user_pages_dirty_lock(dma->pages, dma->nr_pages, - dma->direction == DMA_FROM_DEVICE); - kfree(dma->pages); - dma->pages = NULL; - } - - if (dma->dma_addr) { - for (i = 0; i < dma->nr_pages; i++) { - void *addr; - - addr = page_address(dma->vaddr_pages[i]); - dma_free_coherent(dma->dev, PAGE_SIZE, addr, - dma->dma_addr[i]); - } - kfree(dma->dma_addr); - dma->dma_addr = NULL; - kfree(dma->vaddr_pages); - dma->vaddr_pages = NULL; - vunmap(dma->vaddr); - dma->vaddr = NULL; - } - - if (dma->bus_addr) - dma->bus_addr = 0; - dma->direction = DMA_NONE; - - return 0; -} -EXPORT_SYMBOL_GPL(videobuf_dma_free); - -/* --------------------------------------------------------------------- */ - -static void videobuf_vm_open(struct vm_area_struct *vma) -{ - struct videobuf_mapping *map = vma->vm_private_data; - - dprintk(2, "vm_open %p [count=%d,vma=%08lx-%08lx]\n", map, - map->count, vma->vm_start, vma->vm_end); - - map->count++; -} - -static void videobuf_vm_close(struct vm_area_struct *vma) -{ - struct videobuf_mapping *map = vma->vm_private_data; - struct videobuf_queue *q = map->q; - struct videobuf_dma_sg_memory *mem; - int i; - - dprintk(2, "vm_close %p [count=%d,vma=%08lx-%08lx]\n", map, - map->count, vma->vm_start, vma->vm_end); - - map->count--; - if (0 == map->count) { - dprintk(1, "munmap %p q=%p\n", map, q); - videobuf_queue_lock(q); - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - mem = q->bufs[i]->priv; - if (!mem) - continue; - - MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); - - if (q->bufs[i]->map != map) - continue; - q->bufs[i]->map = NULL; - q->bufs[i]->baddr = 0; - q->ops->buf_release(q, q->bufs[i]); - } - videobuf_queue_unlock(q); - kfree(map); - } -} - -/* - * Get a anonymous page for the mapping. Make sure we can DMA to that - * memory location with 32bit PCI devices (i.e. don't use highmem for - * now ...). Bounce buffers don't work very well for the data rates - * video capture has. - */ -static vm_fault_t videobuf_vm_fault(struct vm_fault *vmf) -{ - struct vm_area_struct *vma = vmf->vma; - struct page *page; - - dprintk(3, "fault: fault @ %08lx [vma %08lx-%08lx]\n", - vmf->address, vma->vm_start, vma->vm_end); - - page = alloc_page(GFP_USER | __GFP_DMA32); - if (!page) - return VM_FAULT_OOM; - clear_user_highpage(page, vmf->address); - vmf->page = page; - - return 0; -} - -static const struct vm_operations_struct videobuf_vm_ops = { - .open = videobuf_vm_open, - .close = videobuf_vm_close, - .fault = videobuf_vm_fault, -}; - -/* --------------------------------------------------------------------- - * SG handlers for the generic methods - */ - -/* Allocated area consists on 3 parts: - struct video_buffer - struct _buffer (cx88_buffer, saa7134_buf, ...) - struct videobuf_dma_sg_memory - */ - -static struct videobuf_buffer *__videobuf_alloc_vb(size_t size) -{ - struct videobuf_dma_sg_memory *mem; - struct videobuf_buffer *vb; - - vb = kzalloc(size + sizeof(*mem), GFP_KERNEL); - if (!vb) - return vb; - - mem = vb->priv = ((char *)vb) + size; - mem->magic = MAGIC_SG_MEM; - - videobuf_dma_init(&mem->dma); - - dprintk(1, "%s: allocated at %p(%ld+%ld) & %p(%ld)\n", - __func__, vb, (long)sizeof(*vb), (long)size - sizeof(*vb), - mem, (long)sizeof(*mem)); - - return vb; -} - -static void *__videobuf_to_vaddr(struct videobuf_buffer *buf) -{ - struct videobuf_dma_sg_memory *mem = buf->priv; - BUG_ON(!mem); - - MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); - - return mem->dma.vaddr; -} - -static int __videobuf_iolock(struct videobuf_queue *q, - struct videobuf_buffer *vb, - struct v4l2_framebuffer *fbuf) -{ - struct videobuf_dma_sg_memory *mem = vb->priv; - unsigned long pages; - dma_addr_t bus; - int err; - - BUG_ON(!mem); - - MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); - - if (!mem->dma.dev) - mem->dma.dev = q->dev; - else - WARN_ON(mem->dma.dev != q->dev); - - switch (vb->memory) { - case V4L2_MEMORY_MMAP: - case V4L2_MEMORY_USERPTR: - if (0 == vb->baddr) { - /* no userspace addr -- kernel bounce buffer */ - pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT; - err = videobuf_dma_init_kernel(&mem->dma, - DMA_FROM_DEVICE, - pages); - if (0 != err) - return err; - } else if (vb->memory == V4L2_MEMORY_USERPTR) { - /* dma directly to userspace */ - err = videobuf_dma_init_user(&mem->dma, - DMA_FROM_DEVICE, - vb->baddr, vb->bsize); - if (0 != err) - return err; - } else { - /* NOTE: HACK: videobuf_iolock on V4L2_MEMORY_MMAP - buffers can only be called from videobuf_qbuf - we take current->mm->mmap_lock there, to prevent - locking inversion, so don't take it here */ - - err = videobuf_dma_init_user_locked(&mem->dma, - DMA_FROM_DEVICE, - vb->baddr, vb->bsize); - if (0 != err) - return err; - } - break; - case V4L2_MEMORY_OVERLAY: - if (NULL == fbuf) - return -EINVAL; - /* FIXME: need sanity checks for vb->boff */ - /* - * Using a double cast to avoid compiler warnings when - * building for PAE. Compiler doesn't like direct casting - * of a 32 bit ptr to 64 bit integer. - */ - bus = (dma_addr_t)(unsigned long)fbuf->base + vb->boff; - pages = PAGE_ALIGN(vb->size) >> PAGE_SHIFT; - err = videobuf_dma_init_overlay(&mem->dma, DMA_FROM_DEVICE, - bus, pages); - if (0 != err) - return err; - break; - default: - BUG(); - } - err = videobuf_dma_map(q->dev, &mem->dma); - if (0 != err) - return err; - - return 0; -} - -static int __videobuf_sync(struct videobuf_queue *q, - struct videobuf_buffer *buf) -{ - struct videobuf_dma_sg_memory *mem = buf->priv; - BUG_ON(!mem || !mem->dma.sglen); - - MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); - MAGIC_CHECK(mem->dma.magic, MAGIC_DMABUF); - - dma_sync_sg_for_cpu(q->dev, mem->dma.sglist, - mem->dma.nr_pages, mem->dma.direction); - - return 0; -} - -static int __videobuf_mmap_mapper(struct videobuf_queue *q, - struct videobuf_buffer *buf, - struct vm_area_struct *vma) -{ - struct videobuf_dma_sg_memory *mem = buf->priv; - struct videobuf_mapping *map; - unsigned int first, last, size = 0, i; - int retval; - - retval = -EINVAL; - - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_SG_MEM); - - /* look for first buffer to map */ - for (first = 0; first < VIDEO_MAX_FRAME; first++) { - if (buf == q->bufs[first]) { - size = PAGE_ALIGN(q->bufs[first]->bsize); - break; - } - } - - /* paranoia, should never happen since buf is always valid. */ - if (!size) { - dprintk(1, "mmap app bug: offset invalid [offset=0x%lx]\n", - (vma->vm_pgoff << PAGE_SHIFT)); - goto done; - } - - last = first; - - /* create mapping + update buffer list */ - retval = -ENOMEM; - map = kmalloc(sizeof(struct videobuf_mapping), GFP_KERNEL); - if (NULL == map) - goto done; - - size = 0; - for (i = first; i <= last; i++) { - if (NULL == q->bufs[i]) - continue; - q->bufs[i]->map = map; - q->bufs[i]->baddr = vma->vm_start + size; - size += PAGE_ALIGN(q->bufs[i]->bsize); - } - - map->count = 1; - map->q = q; - vma->vm_ops = &videobuf_vm_ops; - /* using shared anonymous pages */ - vm_flags_mod(vma, VM_DONTEXPAND | VM_DONTDUMP, VM_IO); - vma->vm_private_data = map; - dprintk(1, "mmap %p: q=%p %08lx-%08lx pgoff %08lx bufs %d-%d\n", - map, q, vma->vm_start, vma->vm_end, vma->vm_pgoff, first, last); - retval = 0; - -done: - return retval; -} - -static struct videobuf_qtype_ops sg_ops = { - .magic = MAGIC_QTYPE_OPS, - - .alloc_vb = __videobuf_alloc_vb, - .iolock = __videobuf_iolock, - .sync = __videobuf_sync, - .mmap_mapper = __videobuf_mmap_mapper, - .vaddr = __videobuf_to_vaddr, -}; - -void *videobuf_sg_alloc(size_t size) -{ - struct videobuf_queue q; - - /* Required to make generic handler to call __videobuf_alloc */ - q.int_ops = &sg_ops; - - q.msize = size; - - return videobuf_alloc_vb(&q); -} -EXPORT_SYMBOL_GPL(videobuf_sg_alloc); - -void videobuf_queue_sg_init(struct videobuf_queue *q, - const struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv, - struct mutex *ext_lock) -{ - videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize, - priv, &sg_ops, ext_lock); -} -EXPORT_SYMBOL_GPL(videobuf_queue_sg_init); - diff --git a/drivers/media/v4l2-core/videobuf-vmalloc.c b/drivers/media/v4l2-core/videobuf-vmalloc.c deleted file mode 100644 index 85c7090606..0000000000 --- a/drivers/media/v4l2-core/videobuf-vmalloc.c +++ /dev/null @@ -1,326 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * helper functions for vmalloc video4linux capture buffers - * - * The functions expect the hardware being able to scatter gather - * (i.e. the buffers are not linear in physical memory, but fragmented - * into PAGE_SIZE chunks). They also assume the driver does not need - * to touch the video data. - * - * (c) 2007 Mauro Carvalho Chehab - */ - -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include - -#include - -#define MAGIC_DMABUF 0x17760309 -#define MAGIC_VMAL_MEM 0x18221223 - -#define MAGIC_CHECK(is, should) \ - if (unlikely((is) != (should))) { \ - printk(KERN_ERR "magic mismatch: %x (expected %x)\n", \ - is, should); \ - BUG(); \ - } - -static int debug; -module_param(debug, int, 0644); - -MODULE_DESCRIPTION("helper module to manage video4linux vmalloc buffers"); -MODULE_AUTHOR("Mauro Carvalho Chehab "); -MODULE_LICENSE("GPL"); - -#define dprintk(level, fmt, arg...) \ - if (debug >= level) \ - printk(KERN_DEBUG "vbuf-vmalloc: " fmt , ## arg) - - -/***************************************************************************/ - -static void videobuf_vm_open(struct vm_area_struct *vma) -{ - struct videobuf_mapping *map = vma->vm_private_data; - - dprintk(2, "vm_open %p [count=%u,vma=%08lx-%08lx]\n", map, - map->count, vma->vm_start, vma->vm_end); - - map->count++; -} - -static void videobuf_vm_close(struct vm_area_struct *vma) -{ - struct videobuf_mapping *map = vma->vm_private_data; - struct videobuf_queue *q = map->q; - int i; - - dprintk(2, "vm_close %p [count=%u,vma=%08lx-%08lx]\n", map, - map->count, vma->vm_start, vma->vm_end); - - map->count--; - if (0 == map->count) { - struct videobuf_vmalloc_memory *mem; - - dprintk(1, "munmap %p q=%p\n", map, q); - videobuf_queue_lock(q); - - /* We need first to cancel streams, before unmapping */ - if (q->streaming) - videobuf_queue_cancel(q); - - for (i = 0; i < VIDEO_MAX_FRAME; i++) { - if (NULL == q->bufs[i]) - continue; - - if (q->bufs[i]->map != map) - continue; - - mem = q->bufs[i]->priv; - if (mem) { - /* This callback is called only if kernel has - allocated memory and this memory is mmapped. - In this case, memory should be freed, - in order to do memory unmap. - */ - - MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); - - /* vfree is not atomic - can't be - called with IRQ's disabled - */ - dprintk(1, "%s: buf[%d] freeing (%p)\n", - __func__, i, mem->vaddr); - - vfree(mem->vaddr); - mem->vaddr = NULL; - } - - q->bufs[i]->map = NULL; - q->bufs[i]->baddr = 0; - } - - kfree(map); - - videobuf_queue_unlock(q); - } - - return; -} - -static const struct vm_operations_struct videobuf_vm_ops = { - .open = videobuf_vm_open, - .close = videobuf_vm_close, -}; - -/* --------------------------------------------------------------------- - * vmalloc handlers for the generic methods - */ - -/* Allocated area consists on 3 parts: - struct video_buffer - struct _buffer (cx88_buffer, saa7134_buf, ...) - struct videobuf_dma_sg_memory - */ - -static struct videobuf_buffer *__videobuf_alloc_vb(size_t size) -{ - struct videobuf_vmalloc_memory *mem; - struct videobuf_buffer *vb; - - vb = kzalloc(size + sizeof(*mem), GFP_KERNEL); - if (!vb) - return vb; - - mem = vb->priv = ((char *)vb) + size; - mem->magic = MAGIC_VMAL_MEM; - - dprintk(1, "%s: allocated at %p(%ld+%ld) & %p(%ld)\n", - __func__, vb, (long)sizeof(*vb), (long)size - sizeof(*vb), - mem, (long)sizeof(*mem)); - - return vb; -} - -static int __videobuf_iolock(struct videobuf_queue *q, - struct videobuf_buffer *vb, - struct v4l2_framebuffer *fbuf) -{ - struct videobuf_vmalloc_memory *mem = vb->priv; - int pages; - - BUG_ON(!mem); - - MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); - - switch (vb->memory) { - case V4L2_MEMORY_MMAP: - dprintk(1, "%s memory method MMAP\n", __func__); - - /* All handling should be done by __videobuf_mmap_mapper() */ - if (!mem->vaddr) { - printk(KERN_ERR "memory is not allocated/mmapped.\n"); - return -EINVAL; - } - break; - case V4L2_MEMORY_USERPTR: - pages = PAGE_ALIGN(vb->size); - - dprintk(1, "%s memory method USERPTR\n", __func__); - - if (vb->baddr) { - printk(KERN_ERR "USERPTR is currently not supported\n"); - return -EINVAL; - } - - /* The only USERPTR currently supported is the one needed for - * read() method. - */ - - mem->vaddr = vmalloc_user(pages); - if (!mem->vaddr) { - printk(KERN_ERR "vmalloc (%d pages) failed\n", pages); - return -ENOMEM; - } - dprintk(1, "vmalloc is at addr %p (%d pages)\n", - mem->vaddr, pages); - break; - case V4L2_MEMORY_OVERLAY: - default: - dprintk(1, "%s memory method OVERLAY/unknown\n", __func__); - - /* Currently, doesn't support V4L2_MEMORY_OVERLAY */ - printk(KERN_ERR "Memory method currently unsupported.\n"); - return -EINVAL; - } - - return 0; -} - -static int __videobuf_mmap_mapper(struct videobuf_queue *q, - struct videobuf_buffer *buf, - struct vm_area_struct *vma) -{ - struct videobuf_vmalloc_memory *mem; - struct videobuf_mapping *map; - int retval, pages; - - dprintk(1, "%s\n", __func__); - - /* create mapping + update buffer list */ - map = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL); - if (NULL == map) - return -ENOMEM; - - buf->map = map; - map->q = q; - - buf->baddr = vma->vm_start; - - mem = buf->priv; - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); - - pages = PAGE_ALIGN(vma->vm_end - vma->vm_start); - mem->vaddr = vmalloc_user(pages); - if (!mem->vaddr) { - printk(KERN_ERR "vmalloc (%d pages) failed\n", pages); - goto error; - } - dprintk(1, "vmalloc is at addr %p (%d pages)\n", mem->vaddr, pages); - - /* Try to remap memory */ - retval = remap_vmalloc_range(vma, mem->vaddr, 0); - if (retval < 0) { - printk(KERN_ERR "mmap: remap failed with error %d. ", retval); - vfree(mem->vaddr); - goto error; - } - - vma->vm_ops = &videobuf_vm_ops; - vm_flags_set(vma, VM_DONTEXPAND | VM_DONTDUMP); - vma->vm_private_data = map; - - dprintk(1, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n", - map, q, vma->vm_start, vma->vm_end, - (long int)buf->bsize, - vma->vm_pgoff, buf->i); - - videobuf_vm_open(vma); - - return 0; - -error: - mem = NULL; - kfree(map); - return -ENOMEM; -} - -static struct videobuf_qtype_ops qops = { - .magic = MAGIC_QTYPE_OPS, - - .alloc_vb = __videobuf_alloc_vb, - .iolock = __videobuf_iolock, - .mmap_mapper = __videobuf_mmap_mapper, - .vaddr = videobuf_to_vmalloc, -}; - -void videobuf_queue_vmalloc_init(struct videobuf_queue *q, - const struct videobuf_queue_ops *ops, - struct device *dev, - spinlock_t *irqlock, - enum v4l2_buf_type type, - enum v4l2_field field, - unsigned int msize, - void *priv, - struct mutex *ext_lock) -{ - videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize, - priv, &qops, ext_lock); -} -EXPORT_SYMBOL_GPL(videobuf_queue_vmalloc_init); - -void *videobuf_to_vmalloc(struct videobuf_buffer *buf) -{ - struct videobuf_vmalloc_memory *mem = buf->priv; - BUG_ON(!mem); - MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); - - return mem->vaddr; -} -EXPORT_SYMBOL_GPL(videobuf_to_vmalloc); - -void videobuf_vmalloc_free(struct videobuf_buffer *buf) -{ - struct videobuf_vmalloc_memory *mem = buf->priv; - - /* mmapped memory can't be freed here, otherwise mmapped region - would be released, while still needed. In this case, the memory - release should happen inside videobuf_vm_close(). - So, it should free memory only if the memory were allocated for - read() operation. - */ - if ((buf->memory != V4L2_MEMORY_USERPTR) || buf->baddr) - return; - - if (!mem) - return; - - MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM); - - vfree(mem->vaddr); - mem->vaddr = NULL; - - return; -} -EXPORT_SYMBOL_GPL(videobuf_vmalloc_free); - -- cgit v1.2.3