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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2014-01-02 22:12:42 -0300
committerMauro Carvalho Chehab <m.chehab@samsung.com>2014-05-25 11:13:17 -0300
commit9000427aec61b2ae3766d0f635bf1d60fcb8c41b (patch)
treee191e5d12f8158c61c6e205c38cf7d753bc7f8a2
parent2a6dc96b973c8d1defd39bf21e89e6907b1c72f1 (diff)
[media] omap3isp: queue: Move IOMMU handling code to the queue
As a preparation for the switch from the OMAP IOMMU API to the DMA API move all IOMMU handling code from the video node implementation to the buffers queue implementation. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Sakari Ailus <sakari.ailus@iki.fi> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
-rw-r--r--drivers/media/platform/omap3isp/ispqueue.c78
-rw-r--r--drivers/media/platform/omap3isp/ispqueue.h6
-rw-r--r--drivers/media/platform/omap3isp/ispvideo.c77
3 files changed, 78 insertions, 83 deletions
diff --git a/drivers/media/platform/omap3isp/ispqueue.c b/drivers/media/platform/omap3isp/ispqueue.c
index a5e65858e799..8623c058734e 100644
--- a/drivers/media/platform/omap3isp/ispqueue.c
+++ b/drivers/media/platform/omap3isp/ispqueue.c
@@ -26,6 +26,7 @@
#include <asm/cacheflush.h>
#include <linux/dma-mapping.h>
#include <linux/mm.h>
+#include <linux/omap-iommu.h>
#include <linux/pagemap.h>
#include <linux/poll.h>
#include <linux/scatterlist.h>
@@ -33,7 +34,58 @@
#include <linux/slab.h>
#include <linux/vmalloc.h>
+#include "isp.h"
#include "ispqueue.h"
+#include "ispvideo.h"
+
+/* -----------------------------------------------------------------------------
+ * IOMMU management
+ */
+
+#define IOMMU_FLAG (IOVMF_ENDIAN_LITTLE | IOVMF_ELSZ_8)
+
+/*
+ * ispmmu_vmap - Wrapper for Virtual memory mapping of a scatter gather list
+ * @dev: Device pointer specific to the OMAP3 ISP.
+ * @sglist: Pointer to source Scatter gather list to allocate.
+ * @sglen: Number of elements of the scatter-gatter list.
+ *
+ * Returns a resulting mapped device address by the ISP MMU, or -ENOMEM if
+ * we ran out of memory.
+ */
+static dma_addr_t
+ispmmu_vmap(struct isp_device *isp, const struct scatterlist *sglist, int sglen)
+{
+ struct sg_table *sgt;
+ u32 da;
+
+ sgt = kmalloc(sizeof(*sgt), GFP_KERNEL);
+ if (sgt == NULL)
+ return -ENOMEM;
+
+ sgt->sgl = (struct scatterlist *)sglist;
+ sgt->nents = sglen;
+ sgt->orig_nents = sglen;
+
+ da = omap_iommu_vmap(isp->domain, isp->dev, 0, sgt, IOMMU_FLAG);
+ if (IS_ERR_VALUE(da))
+ kfree(sgt);
+
+ return da;
+}
+
+/*
+ * ispmmu_vunmap - Unmap a device address from the ISP MMU
+ * @dev: Device pointer specific to the OMAP3 ISP.
+ * @da: Device address generated from a ispmmu_vmap call.
+ */
+static void ispmmu_vunmap(struct isp_device *isp, dma_addr_t da)
+{
+ struct sg_table *sgt;
+
+ sgt = omap_iommu_vunmap(isp->domain, isp->dev, (u32)da);
+ kfree(sgt);
+}
/* -----------------------------------------------------------------------------
* Video buffers management
@@ -260,11 +312,15 @@ static int isp_video_buffer_sglist_pfnmap(struct isp_video_buffer *buf)
*/
static void isp_video_buffer_cleanup(struct isp_video_buffer *buf)
{
+ struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
+ struct isp_video *video = vfh->video;
enum dma_data_direction direction;
unsigned int i;
- if (buf->queue->ops->buffer_cleanup)
- buf->queue->ops->buffer_cleanup(buf);
+ if (buf->dma) {
+ ispmmu_vunmap(video->isp, buf->dma);
+ buf->dma = 0;
+ }
if (!(buf->vm_flags & VM_PFNMAP)) {
direction = buf->vbuf.type == V4L2_BUF_TYPE_VIDEO_CAPTURE
@@ -479,7 +535,10 @@ done:
*/
static int isp_video_buffer_prepare(struct isp_video_buffer *buf)
{
+ struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
+ struct isp_video *video = vfh->video;
enum dma_data_direction direction;
+ unsigned long addr;
int ret;
switch (buf->vbuf.memory) {
@@ -525,6 +584,21 @@ static int isp_video_buffer_prepare(struct isp_video_buffer *buf)
}
}
+ addr = ispmmu_vmap(video->isp, buf->sglist, buf->sglen);
+ if (IS_ERR_VALUE(addr)) {
+ ret = -EIO;
+ goto done;
+ }
+
+ buf->dma = addr;
+
+ if (!IS_ALIGNED(addr, 32)) {
+ dev_dbg(video->isp->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);
diff --git a/drivers/media/platform/omap3isp/ispqueue.h b/drivers/media/platform/omap3isp/ispqueue.h
index 3e048ad65647..0899a116b4d5 100644
--- a/drivers/media/platform/omap3isp/ispqueue.h
+++ b/drivers/media/platform/omap3isp/ispqueue.h
@@ -106,6 +106,7 @@ struct isp_video_buffer {
struct list_head irqlist;
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)
@@ -121,17 +122,12 @@ struct isp_video_buffer {
* mapping the buffer memory in an IOMMU). This operation is optional.
* @buffer_queue: Called when a buffer is being added to the queue with the
* queue irqlock spinlock held.
- * @buffer_cleanup: Called before freeing buffers, or before changing the
- * userspace memory address for a USERPTR buffer, with the queue lock held.
- * Drivers must perform cleanup operations required to undo the
- * buffer_prepare call. This operation is optional.
*/
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);
- void (*buffer_cleanup)(struct isp_video_buffer *buf);
};
/**
diff --git a/drivers/media/platform/omap3isp/ispvideo.c b/drivers/media/platform/omap3isp/ispvideo.c
index e0f594f34bec..a7ef0816230a 100644
--- a/drivers/media/platform/omap3isp/ispvideo.c
+++ b/drivers/media/platform/omap3isp/ispvideo.c
@@ -27,7 +27,6 @@
#include <linux/clk.h>
#include <linux/mm.h>
#include <linux/module.h>
-#include <linux/omap-iommu.h>
#include <linux/pagemap.h>
#include <linux/scatterlist.h>
#include <linux/sched.h>
@@ -326,55 +325,6 @@ isp_video_check_format(struct isp_video *video, struct isp_video_fh *vfh)
}
/* -----------------------------------------------------------------------------
- * IOMMU management
- */
-
-#define IOMMU_FLAG (IOVMF_ENDIAN_LITTLE | IOVMF_ELSZ_8)
-
-/*
- * ispmmu_vmap - Wrapper for Virtual memory mapping of a scatter gather list
- * @isp: Device pointer specific to the OMAP3 ISP.
- * @sglist: Pointer to source Scatter gather list to allocate.
- * @sglen: Number of elements of the scatter-gatter list.
- *
- * Returns a resulting mapped device address by the ISP MMU, or -ENOMEM if
- * we ran out of memory.
- */
-static dma_addr_t
-ispmmu_vmap(struct isp_device *isp, const struct scatterlist *sglist, int sglen)
-{
- struct sg_table *sgt;
- u32 da;
-
- sgt = kmalloc(sizeof(*sgt), GFP_KERNEL);
- if (sgt == NULL)
- return -ENOMEM;
-
- sgt->sgl = (struct scatterlist *)sglist;
- sgt->nents = sglen;
- sgt->orig_nents = sglen;
-
- da = omap_iommu_vmap(isp->domain, isp->dev, 0, sgt, IOMMU_FLAG);
- if (IS_ERR_VALUE(da))
- kfree(sgt);
-
- return da;
-}
-
-/*
- * ispmmu_vunmap - Unmap a device address from the ISP MMU
- * @isp: Device pointer specific to the OMAP3 ISP.
- * @da: Device address generated from a ispmmu_vmap call.
- */
-static void ispmmu_vunmap(struct isp_device *isp, dma_addr_t da)
-{
- struct sg_table *sgt;
-
- sgt = omap_iommu_vunmap(isp->domain, isp->dev, (u32)da);
- kfree(sgt);
-}
-
-/* -----------------------------------------------------------------------------
* Video queue operations
*/
@@ -392,24 +342,11 @@ static void isp_video_queue_prepare(struct isp_video_queue *queue,
*nbuffers = min(*nbuffers, video->capture_mem / PAGE_ALIGN(*size));
}
-static void isp_video_buffer_cleanup(struct isp_video_buffer *buf)
-{
- struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
- struct isp_buffer *buffer = to_isp_buffer(buf);
- struct isp_video *video = vfh->video;
-
- if (buffer->isp_addr) {
- ispmmu_vunmap(video->isp, buffer->isp_addr);
- buffer->isp_addr = 0;
- }
-}
-
static int isp_video_buffer_prepare(struct isp_video_buffer *buf)
{
struct isp_video_fh *vfh = isp_video_queue_to_isp_video_fh(buf->queue);
struct isp_buffer *buffer = to_isp_buffer(buf);
struct isp_video *video = vfh->video;
- unsigned long 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
@@ -420,18 +357,7 @@ static int isp_video_buffer_prepare(struct isp_video_buffer *buf)
if (unlikely(video->error))
return -EIO;
- addr = ispmmu_vmap(video->isp, buf->sglist, buf->sglen);
- if (IS_ERR_VALUE(addr))
- return -EIO;
-
- if (!IS_ALIGNED(addr, 32)) {
- dev_dbg(video->isp->dev, "Buffer address must be "
- "aligned to 32 bytes boundary.\n");
- ispmmu_vunmap(video->isp, buffer->isp_addr);
- return -EINVAL;
- }
-
- buffer->isp_addr = addr;
+ buffer->isp_addr = buf->dma;
return 0;
}
@@ -490,7 +416,6 @@ 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,
- .buffer_cleanup = &isp_video_buffer_cleanup,
};
/*

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