+++ /dev/null
-/*
- * ispqueue.c
- *
- * TI OMAP3 ISP - Video buffers queue handling
- *
- * Copyright (C) 2010 Nokia Corporation
- *
- * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
- * Sakari Ailus <sakari.ailus@iki.fi>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- */
-
-#include <asm/cacheflush.h>
-#include <linux/dma-mapping.h>
-#include <linux/mm.h>
-#include <linux/pagemap.h>
-#include <linux/poll.h>
-#include <linux/scatterlist.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-
-#include "isp.h"
-#include "ispqueue.h"
-#include "ispvideo.h"
-
-/* -----------------------------------------------------------------------------
- * Video buffers management
- */
-
-/*
- * isp_video_buffer_cache_sync - Keep the buffers coherent between CPU and ISP
- *
- * The typical operation required here is Cache Invalidation across
- * the (user space) buffer address range. And this _must_ be done
- * at QBUF stage (and *only* at QBUF).
- *
- * We try to use optimal cache invalidation function:
- * - dmac_map_area:
- * - used when the number of pages are _low_.
- * - it becomes quite slow as the number of pages increase.
- * - for 648x492 viewfinder (150 pages) it takes 1.3 ms.
- * - for 5 Mpix buffer (2491 pages) it takes between 25-50 ms.
- *
- * - flush_cache_all:
- * - used when the number of pages are _high_.
- * - time taken in the range of 500-900 us.
- * - has a higher penalty but, as whole dcache + icache is invalidated
- */
-/*
- * FIXME: dmac_inv_range crashes randomly on the user space buffer
- * address. Fall back to flush_cache_all for now.
- */
-#define ISP_CACHE_FLUSH_PAGES_MAX 0
-
-static void isp_video_buffer_cache_sync(struct isp_video_buffer *buf)
-{
- if (buf->skip_cache)
- return;
-
- if (buf->vbuf.m.userptr == 0 || buf->npages == 0 ||
- buf->npages > ISP_CACHE_FLUSH_PAGES_MAX)
- flush_cache_all();
- else {
- dmac_map_area((void *)buf->vbuf.m.userptr, buf->vbuf.length,
- DMA_FROM_DEVICE);
- outer_inv_range(buf->vbuf.m.userptr,
- buf->vbuf.m.userptr + buf->vbuf.length);
- }
-}
-
-/*
- * isp_video_buffer_lock_vma - Prevent VMAs from being unmapped
- *
- * Lock the VMAs underlying the given buffer into memory. This avoids the
- * userspace buffer mapping from being swapped out, making VIPT cache handling
- * easier.
- *
- * Note that the pages will not be freed as the buffers have been locked to
- * memory using by a call to get_user_pages(), but the userspace mapping could
- * still disappear if the VMAs are not locked. This is caused by the memory
- * management code trying to be as lock-less as possible, which results in the
- * userspace mapping manager not finding out that the pages are locked under
- * some conditions.
- */
-static int isp_video_buffer_lock_vma(struct isp_video_buffer *buf, int lock)
-{
- struct vm_area_struct *vma;
- unsigned long start;
- unsigned long end;
- int ret = 0;
-
- if (buf->vbuf.memory == V4L2_MEMORY_MMAP)
- return 0;
-
- /* We can be called from workqueue context if the current task dies to
- * unlock the VMAs. In that case there's no current memory management
- * context so unlocking can't be performed, but the VMAs have been or
- * are getting destroyed anyway so it doesn't really matter.
- */
- if (!current || !current->mm)
- return lock ? -EINVAL : 0;
-
- start = buf->vbuf.m.userptr;
- end = buf->vbuf.m.userptr + buf->vbuf.length - 1;
-
- down_write(¤t->mm->mmap_sem);
- spin_lock(¤t->mm->page_table_lock);
-
- do {
- vma = find_vma(current->mm, start);
- if (vma == NULL) {
- ret = -EFAULT;
- goto out;
- }
-
- if (lock)
- vma->vm_flags |= VM_LOCKED;
- else
- vma->vm_flags &= ~VM_LOCKED;
-
- start = vma->vm_end + 1;
- } while (vma->vm_end < end);
-
- if (lock)
- buf->vm_flags |= VM_LOCKED;
- else
- buf->vm_flags &= ~VM_LOCKED;
-
-out:
- spin_unlock(¤t->mm->page_table_lock);
- up_write(¤t->mm->mmap_sem);
- return ret;
-}
-
-/*
- * isp_video_buffer_cleanup - Release pages for a userspace VMA.
- *
- * Release pages locked by a call isp_video_buffer_prepare_user and free the
- * pages table.
- */
-static void isp_video_buffer_cleanup(struct isp_video_buffer *buf)
-{
- enum dma_data_direction direction;
- DEFINE_DMA_ATTRS(attrs);
- unsigned int i;
-
- if (buf->vbuf.memory == V4L2_MEMORY_USERPTR) {
- if (buf->skip_cache)
- dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
-
- direction = buf->vbuf.type == V4L2_BUF_TYPE_VIDEO_CAPTURE
- ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
- dma_unmap_sg_attrs(buf->queue->dev, buf->sgt.sgl,
- buf->sgt.orig_nents, direction, &attrs);
- sg_free_table(&buf->sgt);
- }
-
- if (buf->pages != NULL) {
- isp_video_buffer_lock_vma(buf, 0);
-
- for (i = 0; i < buf->npages; ++i)
- page_cache_release(buf->pages[i]);
-
- vfree(buf->pages);
- buf->pages = NULL;
- }
-
- buf->npages = 0;
- buf->skip_cache = false;
-}
-
-/*
- * isp_video_buffer_prepare_user - Prepare a userspace buffer.
- *
- * This function creates a scatter list with a 1:1 mapping for a userspace VMA.
- * The number of pages is first computed based on the buffer size, and pages are
- * then retrieved by a call to get_user_pages.
- *
- * Pages are pinned to memory by get_user_pages, making them available for DMA
- * transfers. However, due to memory management optimization, it seems the
- * get_user_pages doesn't guarantee that the pinned pages will not be written
- * to swap and removed from the userspace mapping(s). When this happens, a page
- * fault can be generated when accessing those unmapped pages.
- *
- * If the fault is triggered by a page table walk caused by VIPT cache
- * management operations, the page fault handler might oops if the MM semaphore
- * is held, as it can't handle kernel page faults in that case. To fix that, a
- * fixup entry needs to be added to the cache management code, or the userspace
- * VMA must be locked to avoid removing pages from the userspace mapping in the
- * first place.
- *
- * If the number of pages retrieved is smaller than the number required by the
- * buffer size, the function returns -EFAULT.
- */
-static int isp_video_buffer_prepare_user(struct isp_video_buffer *buf)
-{
- unsigned int offset;
- unsigned long data;
- unsigned int first;
- unsigned int last;
- int ret;
-
- data = buf->vbuf.m.userptr;
- first = (data & PAGE_MASK) >> PAGE_SHIFT;
- last = ((data + buf->vbuf.length - 1) & PAGE_MASK) >> PAGE_SHIFT;
- offset = data & ~PAGE_MASK;
-
- buf->npages = last - first + 1;
- buf->pages = vmalloc(buf->npages * sizeof(buf->pages[0]));
- if (buf->pages == NULL)
- return -ENOMEM;
-
- down_read(¤t->mm->mmap_sem);
- ret = get_user_pages(current, current->mm, data & PAGE_MASK,
- buf->npages,
- buf->vbuf.type == V4L2_BUF_TYPE_VIDEO_CAPTURE, 0,
- buf->pages, NULL);
- up_read(¤t->mm->mmap_sem);
-
- if (ret != buf->npages) {
- buf->npages = ret < 0 ? 0 : ret;
- return -EFAULT;
- }
-
- ret = isp_video_buffer_lock_vma(buf, 1);
- if (ret < 0)
- return ret;
-
- ret = sg_alloc_table_from_pages(&buf->sgt, buf->pages, buf->npages,
- offset, buf->vbuf.length, GFP_KERNEL);
- if (ret < 0)
- return ret;
-
- return 0;
-}
-
-/*
- * isp_video_buffer_prepare_pfnmap - Prepare a VM_PFNMAP userspace buffer
- *
- * Userspace VM_PFNMAP buffers are supported only if they are contiguous in
- * memory and if they span a single VMA. Start by validating the user pointer to
- * make sure it fulfils that condition, and then build a scatter list of
- * physically contiguous pages starting at the buffer memory physical address.
- *
- * Return 0 on success, -EFAULT if the buffer isn't valid or -ENOMEM if memory
- * can't be allocated.
- */
-static int isp_video_buffer_prepare_pfnmap(struct isp_video_buffer *buf)
-{
- struct vm_area_struct *vma;
- struct scatterlist *sg;
- unsigned long prev_pfn;
- unsigned long this_pfn;
- unsigned long start;
- unsigned int offset;
- unsigned long end;
- unsigned long pfn;
- unsigned int i;
- int ret = 0;
-
- start = buf->vbuf.m.userptr;
- end = buf->vbuf.m.userptr + buf->vbuf.length - 1;
- offset = start & ~PAGE_MASK;
-
- buf->npages = (end >> PAGE_SHIFT) - (start >> PAGE_SHIFT) + 1;
- buf->pages = NULL;
-
- down_read(¤t->mm->mmap_sem);
- vma = find_vma(current->mm, start);
- if (vma == NULL || vma->vm_end < end) {
- ret = -EFAULT;
- goto unlock;
- }
-
- for (prev_pfn = 0; start <= end; start += PAGE_SIZE) {
- ret = follow_pfn(vma, start, &this_pfn);
- if (ret < 0)
- goto unlock;
-
- if (prev_pfn == 0)
- pfn = this_pfn;
- else if (this_pfn != prev_pfn + 1) {
- ret = -EFAULT;
- goto unlock;
- }
-
- prev_pfn = this_pfn;
- }
-
-unlock:
- up_read(¤t->mm->mmap_sem);
- if (ret < 0)
- return ret;
-
- ret = sg_alloc_table(&buf->sgt, buf->npages, GFP_KERNEL);
- if (ret < 0)
- return ret;
-
- for (sg = buf->sgt.sgl, i = 0; i < buf->npages; ++i, ++pfn) {
- sg_set_page(sg, pfn_to_page(pfn), PAGE_SIZE - offset, offset);
- sg = sg_next(sg);
- offset = 0;
- }
-
- return 0;
-}
-
-/*
- * isp_video_buffer_prepare_vm_flags - Get VMA flags for a userspace address
- *
- * This function locates the VMAs for the buffer's userspace address and checks
- * that their flags match. The only flag that we need to care for at the moment
- * is VM_PFNMAP.
- *
- * The buffer vm_flags field is set to the first VMA flags.
- *
- * Return -EFAULT if no VMA can be found for part of the buffer, or if the VMAs
- * have incompatible flags.
- */
-static int isp_video_buffer_prepare_vm_flags(struct isp_video_buffer *buf)
-{
- struct vm_area_struct *vma;
- pgprot_t uninitialized_var(vm_page_prot);
- unsigned long start;
- unsigned long end;
- int ret = -EFAULT;
-
- start = buf->vbuf.m.userptr;
- end = buf->vbuf.m.userptr + buf->vbuf.length - 1;
-
- down_read(¤t->mm->mmap_sem);
-
- do {
- vma = find_vma(current->mm, start);
- if (vma == NULL)
- goto done;
-
- if (start == buf->vbuf.m.userptr) {
- buf->vm_flags = vma->vm_flags;
- vm_page_prot = vma->vm_page_prot;
- }
-
- if ((buf->vm_flags ^ vma->vm_flags) & VM_PFNMAP)
- goto done;
-
- if (vm_page_prot != vma->vm_page_prot)
- goto done;
-
- start = vma->vm_end + 1;
- } while (vma->vm_end < end);
-
- /* Skip cache management to enhance performances for non-cached or
- * write-combining buffers.
- */
- if (vm_page_prot == pgprot_noncached(vm_page_prot) ||
- vm_page_prot == pgprot_writecombine(vm_page_prot))
- buf->skip_cache = true;
-
- ret = 0;
-
-done:
- up_read(¤t->mm->mmap_sem);
- return ret;
-}
-
-/*
- * isp_video_buffer_prepare - Make a buffer ready for operation
- *
- * Preparing a buffer involves:
- *
- * - validating VMAs (userspace buffers only)
- * - locking pages and VMAs into memory (userspace buffers only)
- * - building page and scatter-gather lists (userspace buffers only)
- * - mapping buffers for DMA operation
- * - performing driver-specific preparation
- *
- * The function must be called in userspace context with a valid mm context
- * (this excludes cleanup paths such as sys_close when the userspace process
- * segfaults).
- */
-static int isp_video_buffer_prepare(struct isp_video_buffer *buf)
-{
- enum dma_data_direction direction;
- DEFINE_DMA_ATTRS(attrs);
- int ret;
-
- switch (buf->vbuf.memory) {
- case V4L2_MEMORY_MMAP:
- ret = 0;
- break;
-
- case V4L2_MEMORY_USERPTR:
- ret = isp_video_buffer_prepare_vm_flags(buf);
- if (ret < 0)
- return ret;
-
- if (buf->vm_flags & VM_PFNMAP)
- ret = isp_video_buffer_prepare_pfnmap(buf);
- else
- ret = isp_video_buffer_prepare_user(buf);
-
- if (ret < 0)
- goto done;
-
- if (buf->skip_cache)
- dma_set_attr(DMA_ATTR_SKIP_CPU_SYNC, &attrs);
-
- direction = buf->vbuf.type == V4L2_BUF_TYPE_VIDEO_CAPTURE
- ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
- ret = dma_map_sg_attrs(buf->queue->dev, buf->sgt.sgl,
- buf->sgt.orig_nents, direction, &attrs);
- if (ret <= 0) {
- ret = -EFAULT;
- goto done;
- }
-
- buf->dma = sg_dma_address(buf->sgt.sgl);
- break;
-
- default:
- return -EINVAL;
- }
-
- if (!IS_ALIGNED(buf->dma, 32)) {
- dev_dbg(buf->queue->dev,
- "Buffer address must be aligned to 32 bytes boundary.\n");
- ret = -EINVAL;
- goto done;
- }
-
- if (buf->queue->ops->buffer_prepare)
- ret = buf->queue->ops->buffer_prepare(buf);
-
-done:
- if (ret < 0) {
- isp_video_buffer_cleanup(buf);
- return ret;
- }
-
- return ret;
-}
-
-/*
- * isp_video_queue_query - Query the status of a given buffer
- *
- * Locking: must be called with the queue lock held.
- */
-static void isp_video_buffer_query(struct isp_video_buffer *buf,
- struct v4l2_buffer *vbuf)
-{
- memcpy(vbuf, &buf->vbuf, sizeof(*vbuf));
-
- if (buf->vma_use_count)
- vbuf->flags |= V4L2_BUF_FLAG_MAPPED;
-
- switch (buf->state) {
- case ISP_BUF_STATE_ERROR:
- vbuf->flags |= V4L2_BUF_FLAG_ERROR;
- /* Fallthrough */
- case ISP_BUF_STATE_DONE:
- vbuf->flags |= V4L2_BUF_FLAG_DONE;
- break;
- case ISP_BUF_STATE_QUEUED:
- case ISP_BUF_STATE_ACTIVE:
- vbuf->flags |= V4L2_BUF_FLAG_QUEUED;
- break;
- case ISP_BUF_STATE_IDLE:
- default:
- break;
- }
-}
-
-/*
- * isp_video_buffer_wait - Wait for a buffer to be ready
- *
- * In non-blocking mode, return immediately with 0 if the buffer is ready or
- * -EAGAIN if the buffer is in the QUEUED or ACTIVE state.
- *
- * In blocking mode, wait (interruptibly but with no timeout) on the buffer wait
- * queue using the same condition.
- */
-static int isp_video_buffer_wait(struct isp_video_buffer *buf, int nonblocking)
-{
- if (nonblocking) {
- return (buf->state != ISP_BUF_STATE_QUEUED &&
- buf->state != ISP_BUF_STATE_ACTIVE)
- ? 0 : -EAGAIN;
- }
-
- return wait_event_interruptible(buf->wait,
- buf->state != ISP_BUF_STATE_QUEUED &&
- buf->state != ISP_BUF_STATE_ACTIVE);
-}
-
-/* -----------------------------------------------------------------------------
- * Queue management
- */
-
-/*
- * isp_video_queue_free - Free video buffers memory
- *
- * Buffers can only be freed if the queue isn't streaming and if no buffer is
- * mapped to userspace. Return -EBUSY if those conditions aren't satisfied.
- *
- * This function must be called with the queue lock held.
- */
-static int isp_video_queue_free(struct isp_video_queue *queue)
-{
- unsigned int i;
-
- if (queue->streaming)
- return -EBUSY;
-
- for (i = 0; i < queue->count; ++i) {
- if (queue->buffers[i]->vma_use_count != 0)
- return -EBUSY;
- }
-
- for (i = 0; i < queue->count; ++i) {
- struct isp_video_buffer *buf = queue->buffers[i];
-
- isp_video_buffer_cleanup(buf);
-
- if (buf->vaddr) {
- dma_free_coherent(queue->dev,
- PAGE_ALIGN(buf->vbuf.length),
- buf->vaddr, buf->dma);
- buf->vaddr = NULL;
- }
-
- kfree(buf);
- queue->buffers[i] = NULL;
- }
-
- INIT_LIST_HEAD(&queue->queue);
- queue->count = 0;
- return 0;
-}
-
-/*
- * isp_video_queue_alloc - Allocate video buffers memory
- *
- * This function must be called with the queue lock held.
- */
-static int isp_video_queue_alloc(struct isp_video_queue *queue,
- unsigned int nbuffers,
- unsigned int size, enum v4l2_memory memory)
-{
- struct isp_video_buffer *buf;
- dma_addr_t dma;
- unsigned int i;
- void *mem;
- int ret;
-
- /* Start by freeing the buffers. */
- ret = isp_video_queue_free(queue);
- if (ret < 0)
- return ret;
-
- /* Bail out if no buffers should be allocated. */
- if (nbuffers == 0)
- return 0;
-
- /* Initialize the allocated buffers. */
- for (i = 0; i < nbuffers; ++i) {
- buf = kzalloc(queue->bufsize, GFP_KERNEL);
- if (buf == NULL)
- break;
-
- if (memory == V4L2_MEMORY_MMAP) {
- /* Allocate video buffers memory for mmap mode. Align
- * the size to the page size.
- */
- mem = dma_alloc_coherent(queue->dev, PAGE_ALIGN(size),
- &dma, GFP_KERNEL);
- if (mem == NULL) {
- kfree(buf);
- break;
- }
-
- buf->vbuf.m.offset = i * PAGE_ALIGN(size);
- buf->vaddr = mem;
- buf->dma = dma;
- }
-
- buf->vbuf.index = i;
- buf->vbuf.length = size;
- buf->vbuf.type = queue->type;
- buf->vbuf.flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
- buf->vbuf.field = V4L2_FIELD_NONE;
- buf->vbuf.memory = memory;
-
- buf->queue = queue;
- init_waitqueue_head(&buf->wait);
-
- queue->buffers[i] = buf;
- }
-
- if (i == 0)
- return -ENOMEM;
-
- queue->count = i;
- return nbuffers;
-}
-
-/**
- * omap3isp_video_queue_cleanup - Clean up the video buffers queue
- * @queue: Video buffers queue
- *
- * Free all allocated resources and clean up the video buffers queue. The queue
- * must not be busy (no ongoing video stream) and buffers must have been
- * unmapped.
- *
- * Return 0 on success or -EBUSY if the queue is busy or buffers haven't been
- * unmapped.
- */
-int omap3isp_video_queue_cleanup(struct isp_video_queue *queue)
-{
- return isp_video_queue_free(queue);
-}
-
-/**
- * omap3isp_video_queue_init - Initialize the video buffers queue
- * @queue: Video buffers queue
- * @type: V4L2 buffer type (capture or output)
- * @ops: Driver-specific queue operations
- * @dev: Device used for DMA operations
- * @bufsize: Size of the driver-specific buffer structure
- *
- * Initialize the video buffers queue with the supplied parameters.
- *
- * The queue type must be one of V4L2_BUF_TYPE_VIDEO_CAPTURE or
- * V4L2_BUF_TYPE_VIDEO_OUTPUT. Other buffer types are not supported yet.
- *
- * Buffer objects will be allocated using the given buffer size to allow room
- * for driver-specific fields. Driver-specific buffer structures must start
- * with a struct isp_video_buffer field. Drivers with no driver-specific buffer
- * structure must pass the size of the isp_video_buffer structure in the bufsize
- * parameter.
- *
- * Return 0 on success.
- */
-int omap3isp_video_queue_init(struct isp_video_queue *queue,
- enum v4l2_buf_type type,
- const struct isp_video_queue_operations *ops,
- struct device *dev, unsigned int bufsize)
-{
- INIT_LIST_HEAD(&queue->queue);
-
- queue->type = type;
- queue->ops = ops;
- queue->dev = dev;
- queue->bufsize = bufsize;
-
- return 0;
-}
-
-/* -----------------------------------------------------------------------------
- * V4L2 operations
- */
-
-/**
- * omap3isp_video_queue_reqbufs - Allocate video buffers memory
- *
- * This function is intended to be used as a VIDIOC_REQBUFS ioctl handler. It
- * allocated video buffer objects and, for MMAP buffers, buffer memory.
- *
- * If the number of buffers is 0, all buffers are freed and the function returns
- * without performing any allocation.
- *
- * If the number of buffers is not 0, currently allocated buffers (if any) are
- * freed and the requested number of buffers are allocated. Depending on
- * driver-specific requirements and on memory availability, a number of buffer
- * smaller or bigger than requested can be allocated. This isn't considered as
- * an error.
- *
- * Return 0 on success or one of the following error codes:
- *
- * -EINVAL if the buffer type or index are invalid
- * -EBUSY if the queue is busy (streaming or buffers mapped)
- * -ENOMEM if the buffers can't be allocated due to an out-of-memory condition
- */
-int omap3isp_video_queue_reqbufs(struct isp_video_queue *queue,
- struct v4l2_requestbuffers *rb)
-{
- unsigned int nbuffers = rb->count;
- unsigned int size;
- int ret;
-
- if (rb->type != queue->type)
- return -EINVAL;
-
- queue->ops->queue_prepare(queue, &nbuffers, &size);
- if (size == 0)
- return -EINVAL;
-
- nbuffers = min_t(unsigned int, nbuffers, ISP_VIDEO_MAX_BUFFERS);
-
- ret = isp_video_queue_alloc(queue, nbuffers, size, rb->memory);
- if (ret < 0)
- return ret;
-
- rb->count = ret;
- return 0;
-}
-
-/**
- * omap3isp_video_queue_querybuf - Query the status of a buffer in a queue
- *
- * This function is intended to be used as a VIDIOC_QUERYBUF ioctl handler. It
- * returns the status of a given video buffer.
- *
- * Return 0 on success or -EINVAL if the buffer type or index are invalid.
- */
-int omap3isp_video_queue_querybuf(struct isp_video_queue *queue,
- struct v4l2_buffer *vbuf)
-{
- struct isp_video_buffer *buf;
-
- if (vbuf->type != queue->type)
- return -EINVAL;
-
- if (vbuf->index >= queue->count)
- return -EINVAL;
-
- buf = queue->buffers[vbuf->index];
- isp_video_buffer_query(buf, vbuf);
-
- return 0;
-}
-
-/**
- * omap3isp_video_queue_qbuf - Queue a buffer
- *
- * This function is intended to be used as a VIDIOC_QBUF ioctl handler.
- *
- * The v4l2_buffer structure passed from userspace is first sanity tested. If
- * sane, the buffer is then processed and added to the main queue and, if the
- * queue is streaming, to the IRQ queue.
- *
- * Before being enqueued, USERPTR buffers are checked for address changes. If
- * the buffer has a different userspace address, the old memory area is unlocked
- * and the new memory area is locked.
- */
-int omap3isp_video_queue_qbuf(struct isp_video_queue *queue,
- struct v4l2_buffer *vbuf)
-{
- struct isp_video_buffer *buf;
- int ret;
-
- if (vbuf->type != queue->type)
- return -EINVAL;
-
- if (vbuf->index >= queue->count)
- return -EINVAL;
-
- buf = queue->buffers[vbuf->index];
-
- if (vbuf->memory != buf->vbuf.memory)
- return -EINVAL;
-
- if (buf->state != ISP_BUF_STATE_IDLE)
- return -EINVAL;
-
- if (vbuf->memory == V4L2_MEMORY_USERPTR &&
- vbuf->length < buf->vbuf.length)
- return -EINVAL;
-
- if (vbuf->memory == V4L2_MEMORY_USERPTR &&
- vbuf->m.userptr != buf->vbuf.m.userptr) {
- isp_video_buffer_cleanup(buf);
- buf->vbuf.m.userptr = vbuf->m.userptr;
- buf->prepared = 0;
- }
-
- if (!buf->prepared) {
- ret = isp_video_buffer_prepare(buf);
- if (ret < 0)
- return ret;
- buf->prepared = 1;
- }
-
- isp_video_buffer_cache_sync(buf);
-
- buf->state = ISP_BUF_STATE_QUEUED;
- list_add_tail(&buf->stream, &queue->queue);
-
- if (queue->streaming)
- queue->ops->buffer_queue(buf);
-
- return 0;
-}
-
-/**
- * omap3isp_video_queue_dqbuf - Dequeue a buffer
- *
- * This function is intended to be used as a VIDIOC_DQBUF ioctl handler.
- *
- * Wait until a buffer is ready to be dequeued, remove it from the queue and
- * copy its information to the v4l2_buffer structure.
- *
- * If the nonblocking argument is not zero and no buffer is ready, return
- * -EAGAIN immediately instead of waiting.
- *
- * If no buffer has been enqueued, or if the requested buffer type doesn't match
- * the queue type, return -EINVAL.
- */
-int omap3isp_video_queue_dqbuf(struct isp_video_queue *queue,
- struct v4l2_buffer *vbuf, int nonblocking)
-{
- struct isp_video_buffer *buf;
- int ret;
-
- if (vbuf->type != queue->type)
- return -EINVAL;
-
- if (list_empty(&queue->queue))
- return -EINVAL;
-
- buf = list_first_entry(&queue->queue, struct isp_video_buffer, stream);
- ret = isp_video_buffer_wait(buf, nonblocking);
- if (ret < 0)
- return ret;
-
- list_del(&buf->stream);
-
- isp_video_buffer_query(buf, vbuf);
- buf->state = ISP_BUF_STATE_IDLE;
- vbuf->flags &= ~V4L2_BUF_FLAG_QUEUED;
-
- return 0;
-}
-
-/**
- * omap3isp_video_queue_streamon - Start streaming
- *
- * This function is intended to be used as a VIDIOC_STREAMON ioctl handler. It
- * starts streaming on the queue and calls the buffer_queue operation for all
- * queued buffers.
- *
- * Return 0 on success.
- */
-int omap3isp_video_queue_streamon(struct isp_video_queue *queue)
-{
- struct isp_video_buffer *buf;
-
- if (queue->streaming)
- return 0;
-
- queue->streaming = 1;
-
- list_for_each_entry(buf, &queue->queue, stream)
- queue->ops->buffer_queue(buf);
-
- return 0;
-}
-
-/**
- * omap3isp_video_queue_streamoff - Stop streaming
- *
- * This function is intended to be used as a VIDIOC_STREAMOFF ioctl handler. It
- * stops streaming on the queue and wakes up all the buffers.
- *
- * Drivers must stop the hardware and synchronize with interrupt handlers and/or
- * delayed works before calling this function to make sure no buffer will be
- * touched by the driver and/or hardware.
- */
-void omap3isp_video_queue_streamoff(struct isp_video_queue *queue)
-{
- struct isp_video_buffer *buf;
- unsigned int i;
-
- if (!queue->streaming)
- return;
-
- queue->streaming = 0;
-
- for (i = 0; i < queue->count; ++i) {
- buf = queue->buffers[i];
-
- if (buf->state == ISP_BUF_STATE_ACTIVE)
- wake_up(&buf->wait);
-
- buf->state = ISP_BUF_STATE_IDLE;
- }
-
- INIT_LIST_HEAD(&queue->queue);
-}
-
-/**
- * omap3isp_video_queue_discard_done - Discard all buffers marked as DONE
- *
- * This function is intended to be used with suspend/resume operations. It
- * discards all 'done' buffers as they would be too old to be requested after
- * resume.
- *
- * Drivers must stop the hardware and synchronize with interrupt handlers and/or
- * delayed works before calling this function to make sure no buffer will be
- * touched by the driver and/or hardware.
- */
-void omap3isp_video_queue_discard_done(struct isp_video_queue *queue)
-{
- struct isp_video_buffer *buf;
- unsigned int i;
-
- if (!queue->streaming)
- return;
-
- for (i = 0; i < queue->count; ++i) {
- buf = queue->buffers[i];
-
- if (buf->state == ISP_BUF_STATE_DONE)
- buf->state = ISP_BUF_STATE_ERROR;
- }
-}
-
-static void isp_video_queue_vm_open(struct vm_area_struct *vma)
-{
- struct isp_video_buffer *buf = vma->vm_private_data;
-
- buf->vma_use_count++;
-}
-
-static void isp_video_queue_vm_close(struct vm_area_struct *vma)
-{
- struct isp_video_buffer *buf = vma->vm_private_data;
-
- buf->vma_use_count--;
-}
-
-static const struct vm_operations_struct isp_video_queue_vm_ops = {
- .open = isp_video_queue_vm_open,
- .close = isp_video_queue_vm_close,
-};
-
-/**
- * omap3isp_video_queue_mmap - Map buffers to userspace
- *
- * This function is intended to be used as an mmap() file operation handler. It
- * maps a buffer to userspace based on the VMA offset.
- *
- * Only buffers of memory type MMAP are supported.
- */
-int omap3isp_video_queue_mmap(struct isp_video_queue *queue,
- struct vm_area_struct *vma)
-{
- struct isp_video_buffer *uninitialized_var(buf);
- unsigned long size;
- unsigned int i;
- int ret = 0;
-
- for (i = 0; i < queue->count; ++i) {
- buf = queue->buffers[i];
- if ((buf->vbuf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
- break;
- }
-
- if (i == queue->count)
- return -EINVAL;
-
- size = vma->vm_end - vma->vm_start;
-
- if (buf->vbuf.memory != V4L2_MEMORY_MMAP ||
- size != PAGE_ALIGN(buf->vbuf.length))
- return -EINVAL;
-
- /* dma_mmap_coherent() uses vm_pgoff as an offset inside the buffer
- * while we used it to identify the buffer and want to map the whole
- * buffer.
- */
- vma->vm_pgoff = 0;
-
- ret = dma_mmap_coherent(queue->dev, vma, buf->vaddr, buf->dma, size);
- if (ret < 0)
- return ret;
-
- vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
- vma->vm_ops = &isp_video_queue_vm_ops;
- vma->vm_private_data = buf;
- isp_video_queue_vm_open(vma);
-
- return 0;
-}
-
-/**
- * omap3isp_video_queue_poll - Poll video queue state
- *
- * This function is intended to be used as a poll() file operation handler. It
- * polls the state of the video buffer at the front of the queue and returns an
- * events mask.
- *
- * If no buffer is present at the front of the queue, POLLERR is returned.
- */
-unsigned int omap3isp_video_queue_poll(struct isp_video_queue *queue,
- struct file *file, poll_table *wait)
-{
- struct isp_video_buffer *buf;
- unsigned int mask = 0;
-
- if (list_empty(&queue->queue)) {
- mask |= POLLERR;
- goto done;
- }
- buf = list_first_entry(&queue->queue, struct isp_video_buffer, stream);
-
- poll_wait(file, &buf->wait, wait);
- if (buf->state == ISP_BUF_STATE_DONE ||
- buf->state == ISP_BUF_STATE_ERROR) {
- if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
- mask |= POLLIN | POLLRDNORM;
- else
- mask |= POLLOUT | POLLWRNORM;
- }
-
-done:
- return mask;
-}
+++ /dev/null
-/*
- * ispqueue.h
- *
- * TI OMAP3 ISP - Video buffers queue handling
- *
- * Copyright (C) 2010 Nokia Corporation
- *
- * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
- * Sakari Ailus <sakari.ailus@iki.fi>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- */
-
-#ifndef OMAP3_ISP_QUEUE_H
-#define OMAP3_ISP_QUEUE_H
-
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/mm_types.h>
-#include <linux/mutex.h>
-#include <linux/videodev2.h>
-#include <linux/wait.h>
-
-struct isp_video_queue;
-struct page;
-struct scatterlist;
-
-#define ISP_VIDEO_MAX_BUFFERS 16
-
-/**
- * enum isp_video_buffer_state - ISP video buffer state
- * @ISP_BUF_STATE_IDLE: The buffer is under userspace control (dequeued
- * or not queued yet).
- * @ISP_BUF_STATE_QUEUED: The buffer has been queued but isn't used by the
- * device yet.
- * @ISP_BUF_STATE_ACTIVE: The buffer is in use for an active video transfer.
- * @ISP_BUF_STATE_ERROR: The device is done with the buffer and an error
- * occurred. For capture device the buffer likely contains corrupted data or
- * no data at all.
- * @ISP_BUF_STATE_DONE: The device is done with the buffer and no error occurred.
- * For capture devices the buffer contains valid data.
- */
-enum isp_video_buffer_state {
- ISP_BUF_STATE_IDLE,
- ISP_BUF_STATE_QUEUED,
- ISP_BUF_STATE_ACTIVE,
- ISP_BUF_STATE_ERROR,
- ISP_BUF_STATE_DONE,
-};
-
-/**
- * struct isp_video_buffer - ISP video buffer
- * @vma_use_count: Number of times the buffer is mmap'ed to userspace
- * @stream: List head for insertion into main queue
- * @queue: ISP buffers queue this buffer belongs to
- * @prepared: Whether the buffer has been prepared
- * @skip_cache: Whether to skip cache management operations for this buffer
- * @vaddr: Memory virtual address (for kernel buffers)
- * @vm_flags: Buffer VMA flags (for userspace buffers)
- * @npages: Number of pages (for userspace buffers)
- * @sgt: Scatter gather table (for userspace buffers)
- * @pages: Pages table (for userspace non-VM_PFNMAP buffers)
- * @vbuf: V4L2 buffer
- * @state: Current buffer state
- * @wait: Wait queue to signal buffer completion
- */
-struct isp_video_buffer {
- unsigned long vma_use_count;
- struct list_head stream;
- struct isp_video_queue *queue;
- unsigned int prepared:1;
- bool skip_cache;
-
- /* For kernel buffers. */
- void *vaddr;
-
- /* For userspace buffers. */
- vm_flags_t vm_flags;
- unsigned int npages;
- struct sg_table sgt;
-
- /* For non-VM_PFNMAP userspace buffers. */
- struct page **pages;
-
- /* Touched by the interrupt handler. */
- struct v4l2_buffer vbuf;
- enum isp_video_buffer_state state;
- wait_queue_head_t wait;
- dma_addr_t dma;
-};
-
-#define to_isp_video_buffer(vb) container_of(vb, struct isp_video_buffer, vb)
-
-/**
- * struct isp_video_queue_operations - Driver-specific operations
- * @queue_prepare: Called before allocating buffers. Drivers should clamp the
- * number of buffers according to their requirements, and must return the
- * buffer size in bytes.
- * @buffer_prepare: Called the first time a buffer is queued, or after changing
- * the userspace memory address for a USERPTR buffer, with the queue lock
- * held. Drivers should perform device-specific buffer preparation (such as
- * mapping the buffer memory in an IOMMU). This operation is optional.
- * @buffer_queue: Called when a buffer is being added.
- */
-struct isp_video_queue_operations {
- void (*queue_prepare)(struct isp_video_queue *queue,
- unsigned int *nbuffers, unsigned int *size);
- int (*buffer_prepare)(struct isp_video_buffer *buf);
- void (*buffer_queue)(struct isp_video_buffer *buf);
-};
-
-/**
- * struct isp_video_queue - ISP video buffers queue
- * @type: Type of video buffers handled by this queue
- * @ops: Queue operations
- * @dev: Device used for DMA operations
- * @bufsize: Size of a driver-specific buffer object
- * @count: Number of currently allocated buffers
- * @buffers: ISP video buffers
- * @streaming: Queue state, indicates whether the queue is streaming
- * @queue: List of all queued buffers
- */
-struct isp_video_queue {
- enum v4l2_buf_type type;
- const struct isp_video_queue_operations *ops;
- struct device *dev;
- unsigned int bufsize;
-
- unsigned int count;
- struct isp_video_buffer *buffers[ISP_VIDEO_MAX_BUFFERS];
-
- unsigned int streaming:1;
-
- struct list_head queue;
-};
-
-int omap3isp_video_queue_cleanup(struct isp_video_queue *queue);
-int omap3isp_video_queue_init(struct isp_video_queue *queue,
- enum v4l2_buf_type type,
- const struct isp_video_queue_operations *ops,
- struct device *dev, unsigned int bufsize);
-
-int omap3isp_video_queue_reqbufs(struct isp_video_queue *queue,
- struct v4l2_requestbuffers *rb);
-int omap3isp_video_queue_querybuf(struct isp_video_queue *queue,
- struct v4l2_buffer *vbuf);
-int omap3isp_video_queue_qbuf(struct isp_video_queue *queue,
- struct v4l2_buffer *vbuf);
-int omap3isp_video_queue_dqbuf(struct isp_video_queue *queue,
- struct v4l2_buffer *vbuf, int nonblocking);
-int omap3isp_video_queue_streamon(struct isp_video_queue *queue);
-void omap3isp_video_queue_streamoff(struct isp_video_queue *queue);
-void omap3isp_video_queue_discard_done(struct isp_video_queue *queue);
-int omap3isp_video_queue_mmap(struct isp_video_queue *queue,
- struct vm_area_struct *vma);
-unsigned int omap3isp_video_queue_poll(struct isp_video_queue *queue,
- struct file *file, poll_table *wait);
-
-#endif /* OMAP3_ISP_QUEUE_H */
#include <linux/vmalloc.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-dma-contig.h>
#include "ispvideo.h"
#include "isp.h"
* Video queue operations
*/
-static void isp_video_queue_prepare(struct isp_video_queue *queue,
- unsigned int *nbuffers, unsigned int *size)
+static int isp_video_queue_setup(struct vb2_queue *queue,
+ const struct v4l2_format *fmt,
+ unsigned int *count, unsigned int *num_planes,
+ unsigned int sizes[], void *alloc_ctxs[])
{
- struct isp_video_fh *vfh =
- container_of(queue, struct isp_video_fh, queue);
+ struct isp_video_fh *vfh = vb2_get_drv_priv(queue);
struct isp_video *video = vfh->video;
- *size = vfh->format.fmt.pix.sizeimage;
- if (*size == 0)
- return;
+ *num_planes = 1;
+
+ sizes[0] = vfh->format.fmt.pix.sizeimage;
+ if (sizes[0] == 0)
+ return -EINVAL;
+
+ alloc_ctxs[0] = video->alloc_ctx;
+
+ *count = min(*count, video->capture_mem / PAGE_ALIGN(sizes[0]));
- *nbuffers = min(*nbuffers, video->capture_mem / PAGE_ALIGN(*size));
+ return 0;
}
-static int isp_video_buffer_prepare(struct isp_video_buffer *buf)
+static int isp_video_buffer_prepare(struct vb2_buffer *buf)
{
- struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
+ struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
struct isp_buffer *buffer = to_isp_buffer(buf);
struct isp_video *video = vfh->video;
+ dma_addr_t addr;
/* Refuse to prepare the buffer is the video node has registered an
* error. We don't need to take any lock here as the operation is
if (unlikely(video->error))
return -EIO;
- buffer->isp_addr = buf->dma;
+ addr = vb2_dma_contig_plane_dma_addr(buf, 0);
+ if (!IS_ALIGNED(addr, 32)) {
+ dev_dbg(video->isp->dev,
+ "Buffer address must be aligned to 32 bytes boundary.\n");
+ return -EINVAL;
+ }
+
+ vb2_set_plane_payload(&buffer->vb, 0, vfh->format.fmt.pix.sizeimage);
+ buffer->isp_addr = addr;
+
return 0;
}
* If the pipeline is busy, it will be restarted in the output module interrupt
* handler.
*/
-static void isp_video_buffer_queue(struct isp_video_buffer *buf)
+static void isp_video_buffer_queue(struct vb2_buffer *buf)
{
- struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
+ struct isp_video_fh *vfh = vb2_get_drv_priv(buf->vb2_queue);
struct isp_buffer *buffer = to_isp_buffer(buf);
struct isp_video *video = vfh->video;
struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
spin_lock_irqsave(&video->irqlock, flags);
if (unlikely(video->error)) {
- buf->state = ISP_BUF_STATE_ERROR;
- wake_up(&buf->wait);
+ vb2_buffer_done(&buffer->vb, VB2_BUF_STATE_ERROR);
spin_unlock_irqrestore(&video->irqlock, flags);
return;
}
}
}
-static const struct isp_video_queue_operations isp_video_queue_ops = {
- .queue_prepare = &isp_video_queue_prepare,
- .buffer_prepare = &isp_video_buffer_prepare,
- .buffer_queue = &isp_video_buffer_queue,
+static const struct vb2_ops isp_video_queue_ops = {
+ .queue_setup = isp_video_queue_setup,
+ .buf_prepare = isp_video_buffer_prepare,
+ .buf_queue = isp_video_buffer_queue,
};
/*
* omap3isp_video_buffer_next - Complete the current buffer and return the next
* @video: ISP video object
*
- * Remove the current video buffer from the DMA queue and fill its timestamp,
- * field count and state fields before waking up its completion handler.
+ * Remove the current video buffer from the DMA queue and fill its timestamp and
+ * field count before handing it back to videobuf2.
*
- * For capture video nodes the buffer state is set to ISP_BUF_STATE_DONE if no
- * error has been flagged in the pipeline, or to ISP_BUF_STATE_ERROR otherwise.
- * For video output nodes the buffer state is always set to ISP_BUF_STATE_DONE.
+ * For capture video nodes the buffer state is set to VB2_BUF_STATE_DONE if no
+ * error has been flagged in the pipeline, or to VB2_BUF_STATE_ERROR otherwise.
+ * For video output nodes the buffer state is always set to VB2_BUF_STATE_DONE.
*
* The DMA queue is expected to contain at least one buffer.
*
struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video)
{
struct isp_pipeline *pipe = to_isp_pipeline(&video->video.entity);
- struct isp_video_queue *queue = video->queue;
- struct isp_video_fh *vfh =
- container_of(queue, struct isp_video_fh, queue);
enum isp_pipeline_state state;
struct isp_buffer *buf;
unsigned long flags;
list_del(&buf->irqlist);
spin_unlock_irqrestore(&video->irqlock, flags);
- buf->buffer.vbuf.bytesused = vfh->format.fmt.pix.sizeimage;
-
ktime_get_ts(&ts);
- buf->buffer.vbuf.timestamp.tv_sec = ts.tv_sec;
- buf->buffer.vbuf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
+ buf->vb.v4l2_buf.timestamp.tv_sec = ts.tv_sec;
+ buf->vb.v4l2_buf.timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
/* Do frame number propagation only if this is the output video node.
* Frame number either comes from the CSI receivers or it gets
* first, so the input number might lag behind by 1 in some cases.
*/
if (video == pipe->output && !pipe->do_propagation)
- buf->buffer.vbuf.sequence =
+ buf->vb.v4l2_buf.sequence =
atomic_inc_return(&pipe->frame_number);
else
- buf->buffer.vbuf.sequence = atomic_read(&pipe->frame_number);
+ buf->vb.v4l2_buf.sequence = atomic_read(&pipe->frame_number);
/* Report pipeline errors to userspace on the capture device side. */
- if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) {
- buf->buffer.state = ISP_BUF_STATE_ERROR;
+ if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->error) {
+ state = VB2_BUF_STATE_ERROR;
pipe->error = false;
} else {
- buf->buffer.state = ISP_BUF_STATE_DONE;
+ state = VB2_BUF_STATE_DONE;
}
- wake_up(&buf->buffer.wait);
+ vb2_buffer_done(&buf->vb, state);
+
+ spin_lock_irqsave(&video->irqlock, flags);
if (list_empty(&video->dmaqueue)) {
- if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ spin_unlock_irqrestore(&video->irqlock, flags);
+
+ if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
state = ISP_PIPELINE_QUEUE_OUTPUT
| ISP_PIPELINE_STREAM;
else
return NULL;
}
- if (queue->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
- spin_lock_irqsave(&pipe->lock, flags);
+ if (video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && pipe->input != NULL) {
+ spin_lock(&pipe->lock);
pipe->state &= ~ISP_PIPELINE_STREAM;
- spin_unlock_irqrestore(&pipe->lock, flags);
+ spin_unlock(&pipe->lock);
}
buf = list_first_entry(&video->dmaqueue, struct isp_buffer,
irqlist);
- buf->buffer.state = ISP_BUF_STATE_ACTIVE;
+ buf->vb.state = VB2_BUF_STATE_ACTIVE;
+
+ spin_unlock_irqrestore(&video->irqlock, flags);
+
return buf;
}
buf = list_first_entry(&video->dmaqueue,
struct isp_buffer, irqlist);
list_del(&buf->irqlist);
-
- buf->buffer.state = ISP_BUF_STATE_ERROR;
- wake_up(&buf->buffer.wait);
+ vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
}
video->error = true;
if (continuous && video->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
mutex_lock(&video->queue_lock);
- omap3isp_video_queue_discard_done(video->queue);
+ vb2_discard_done(video->queue);
mutex_unlock(&video->queue_lock);
}
int ret;
mutex_lock(&video->queue_lock);
- ret = omap3isp_video_queue_reqbufs(&vfh->queue, rb);
+ ret = vb2_reqbufs(&vfh->queue, rb);
mutex_unlock(&video->queue_lock);
return ret;
int ret;
mutex_lock(&video->queue_lock);
- ret = omap3isp_video_queue_querybuf(&vfh->queue, b);
+ ret = vb2_querybuf(&vfh->queue, b);
mutex_unlock(&video->queue_lock);
return ret;
int ret;
mutex_lock(&video->queue_lock);
- ret = omap3isp_video_queue_qbuf(&vfh->queue, b);
+ ret = vb2_qbuf(&vfh->queue, b);
mutex_unlock(&video->queue_lock);
return ret;
int ret;
mutex_lock(&video->queue_lock);
- ret = omap3isp_video_queue_dqbuf(&vfh->queue, b,
- file->f_flags & O_NONBLOCK);
+ ret = vb2_dqbuf(&vfh->queue, b, file->f_flags & O_NONBLOCK);
mutex_unlock(&video->queue_lock);
return ret;
mutex_lock(&video->stream_lock);
- if (video->streaming) {
- mutex_unlock(&video->stream_lock);
- return -EBUSY;
- }
-
/* Start streaming on the pipeline. No link touching an entity in the
* pipeline can be activated or deactivated once streaming is started.
*/
atomic_set(&pipe->frame_number, -1);
mutex_lock(&video->queue_lock);
- ret = omap3isp_video_queue_streamon(&vfh->queue);
+ ret = vb2_streamon(&vfh->queue, type);
mutex_unlock(&video->queue_lock);
if (ret < 0)
goto err_check_format;
spin_unlock_irqrestore(&video->irqlock, flags);
}
- video->streaming = 1;
-
mutex_unlock(&video->stream_lock);
return 0;
err_set_stream:
mutex_lock(&video->queue_lock);
- omap3isp_video_queue_streamoff(&vfh->queue);
+ vb2_streamoff(&vfh->queue, type);
mutex_unlock(&video->queue_lock);
err_check_format:
media_entity_pipeline_stop(&video->video.entity);
/* Make sure we're not streaming yet. */
mutex_lock(&video->queue_lock);
- streaming = vfh->queue.streaming;
+ streaming = vb2_is_streaming(&vfh->queue);
mutex_unlock(&video->queue_lock);
if (!streaming)
omap3isp_video_cancel_stream(video);
mutex_lock(&video->queue_lock);
- omap3isp_video_queue_streamoff(&vfh->queue);
+ vb2_streamoff(&vfh->queue, type);
mutex_unlock(&video->queue_lock);
video->queue = NULL;
- video->streaming = 0;
video->error = false;
if (video->isp->pdata->set_constraints)
{
struct isp_video *video = video_drvdata(file);
struct isp_video_fh *handle;
+ struct vb2_queue *queue;
int ret = 0;
handle = kzalloc(sizeof(*handle), GFP_KERNEL);
goto done;
}
- omap3isp_video_queue_init(&handle->queue, video->type,
- &isp_video_queue_ops, video->isp->dev,
- sizeof(struct isp_buffer));
+ queue = &handle->queue;
+ queue->type = video->type;
+ queue->io_modes = VB2_MMAP | VB2_USERPTR;
+ queue->drv_priv = handle;
+ queue->ops = &isp_video_queue_ops;
+ queue->mem_ops = &vb2_dma_contig_memops;
+ queue->buf_struct_size = sizeof(struct isp_buffer);
+ queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+
+ ret = vb2_queue_init(&handle->queue);
+ if (ret < 0) {
+ omap3isp_put(video->isp);
+ goto done;
+ }
memset(&handle->format, 0, sizeof(handle->format));
handle->format.type = video->type;
isp_video_streamoff(file, vfh, video->type);
mutex_lock(&video->queue_lock);
- omap3isp_video_queue_cleanup(&handle->queue);
+ vb2_queue_release(&handle->queue);
mutex_unlock(&video->queue_lock);
omap3isp_pipeline_pm_use(&video->video.entity, 0);
int ret;
mutex_lock(&video->queue_lock);
- ret = omap3isp_video_queue_poll(&vfh->queue, file, wait);
+ ret = vb2_poll(&vfh->queue, file, wait);
mutex_unlock(&video->queue_lock);
return ret;
int ret;
mutex_lock(&video->queue_lock);
- ret = omap3isp_video_queue_mmap(&vfh->queue, vma);
+ ret = vb2_mmap(&vfh->queue, vma);
mutex_unlock(&video->queue_lock);
return ret;
return -EINVAL;
}
+ video->alloc_ctx = vb2_dma_contig_init_ctx(video->isp->dev);
+ if (IS_ERR(video->alloc_ctx))
+ return PTR_ERR(video->alloc_ctx);
+
ret = media_entity_init(&video->video.entity, 1, &video->pad, 0);
- if (ret < 0)
+ if (ret < 0) {
+ vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
return ret;
+ }
mutex_init(&video->mutex);
atomic_set(&video->active, 0);
void omap3isp_video_cleanup(struct isp_video *video)
{
+ vb2_dma_contig_cleanup_ctx(video->alloc_ctx);
media_entity_cleanup(&video->video.entity);
mutex_destroy(&video->queue_lock);
mutex_destroy(&video->stream_lock);
projects / platform / kernel / linux-rpi3.git / commitdiff