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[media] vb2-dma-sg: add allocation context to dma-sg

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Require that dma-sg also uses an allocation context. This is in preparation
for adding prepare/finish memops to sync the memory between DMA and CPU.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Pawel Osciak <pawel@osciak.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Hans Verkuil 2014-11-18 09:51:01 -03:00 committed by Mauro Carvalho Chehab
parent e5ae8fa739
commit 0c3a14c177
20 changed files with 104 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/media/pci/cx23885/cx23885-417.c
View File

@ -1148,6 +1148,7 @@ static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
dev->ts1.ts_packet_count = mpeglines;
*num_planes = 1;
sizes[0] = mpeglinesize * mpeglines;
alloc_ctxs[0] = dev->alloc_ctx;
*num_buffers = mpegbufs;
return 0;
}

10
drivers/media/pci/cx23885/cx23885-core.c
View File

@ -1997,9 +1997,14 @@ static int cx23885_initdev(struct pci_dev *pci_dev,
if (!pci_dma_supported(pci_dev, 0xffffffff)) {
printk("%s/0: Oops: no 32bit PCI DMA ???\n", dev->name);
err = -EIO;
goto fail_irq;
goto fail_context;
}
dev->alloc_ctx = vb2_dma_sg_init_ctx(&pci_dev->dev);
if (IS_ERR(dev->alloc_ctx)) {
err = PTR_ERR(dev->alloc_ctx);
goto fail_context;
}
err = request_irq(pci_dev->irq, cx23885_irq,
IRQF_SHARED, dev->name, dev);
if (err < 0) {
@ -2028,6 +2033,8 @@ static int cx23885_initdev(struct pci_dev *pci_dev,
return 0;
fail_irq:
vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
fail_context:
cx23885_dev_unregister(dev);
fail_ctrl:
v4l2_ctrl_handler_free(hdl);
@ -2053,6 +2060,7 @@ static void cx23885_finidev(struct pci_dev *pci_dev)
free_irq(pci_dev->irq, dev);
cx23885_dev_unregister(dev);
vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
v4l2_ctrl_handler_free(&dev->ctrl_handler);
v4l2_device_unregister(v4l2_dev);
kfree(dev);

1
drivers/media/pci/cx23885/cx23885-dvb.c
View File

@ -102,6 +102,7 @@ static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
port->ts_packet_count = 32;
*num_planes = 1;
sizes[0] = port->ts_packet_size * port->ts_packet_count;
alloc_ctxs[0] = port->dev->alloc_ctx;
*num_buffers = 32;
return 0;
}

1
drivers/media/pci/cx23885/cx23885-vbi.c
View File

@ -132,6 +132,7 @@ static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
lines = VBI_NTSC_LINE_COUNT;
*num_planes = 1;
sizes[0] = lines * VBI_LINE_LENGTH * 2;
alloc_ctxs[0] = dev->alloc_ctx;
return 0;
}

1
drivers/media/pci/cx23885/cx23885-video.c
View File

@ -323,6 +323,7 @@ static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
*num_planes = 1;
sizes[0] = (dev->fmt->depth * dev->width * dev->height) >> 3;
alloc_ctxs[0] = dev->alloc_ctx;
return 0;
}

1
drivers/media/pci/cx23885/cx23885.h
View File

@ -425,6 +425,7 @@ struct cx23885_dev {
struct vb2_queue vb2_vidq;
struct cx23885_dmaqueue vbiq;
struct vb2_queue vb2_vbiq;
void *alloc_ctx;
spinlock_t slock;

18
drivers/media/pci/saa7134/saa7134-core.c
View File

@ -1001,13 +1001,18 @@ static int saa7134_initdev(struct pci_dev *pci_dev,
saa7134_board_init1(dev);
saa7134_hwinit1(dev);
dev->alloc_ctx = vb2_dma_sg_init_ctx(&pci_dev->dev);
if (IS_ERR(dev->alloc_ctx)) {
err = PTR_ERR(dev->alloc_ctx);
goto fail3;
}
/* get irq */
err = request_irq(pci_dev->irq, saa7134_irq,
IRQF_SHARED, dev->name, dev);
if (err < 0) {
printk(KERN_ERR "%s: can't get IRQ %d\n",
dev->name,pci_dev->irq);
goto fail3;
goto fail4;
}
/* wait a bit, register i2c bus */
@ -1065,7 +1070,7 @@ static int saa7134_initdev(struct pci_dev *pci_dev,
if (err < 0) {
printk(KERN_INFO "%s: can't register video device\n",
dev->name);
goto fail4;
goto fail5;
}
printk(KERN_INFO "%s: registered device %s [v4l2]\n",
dev->name, video_device_node_name(dev->video_dev));
@ -1078,7 +1083,7 @@ static int saa7134_initdev(struct pci_dev *pci_dev,
err = video_register_device(dev->vbi_dev,VFL_TYPE_VBI,
vbi_nr[dev->nr]);
if (err < 0)
goto fail4;
goto fail5;
printk(KERN_INFO "%s: registered device %s\n",
dev->name, video_device_node_name(dev->vbi_dev));
@ -1089,7 +1094,7 @@ static int saa7134_initdev(struct pci_dev *pci_dev,
err = video_register_device(dev->radio_dev,VFL_TYPE_RADIO,
radio_nr[dev->nr]);
if (err < 0)
goto fail4;
goto fail5;
printk(KERN_INFO "%s: registered device %s\n",
dev->name, video_device_node_name(dev->radio_dev));
}
@ -1103,10 +1108,12 @@ static int saa7134_initdev(struct pci_dev *pci_dev,
request_submodules(dev);
return 0;
fail4:
fail5:
saa7134_unregister_video(dev);
saa7134_i2c_unregister(dev);
free_irq(pci_dev->irq, dev);
fail4:
vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
fail3:
saa7134_hwfini(dev);
iounmap(dev->lmmio);
@ -1173,6 +1180,7 @@ static void saa7134_finidev(struct pci_dev *pci_dev)
/* release resources */
free_irq(pci_dev->irq, dev);
vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
iounmap(dev->lmmio);
release_mem_region(pci_resource_start(pci_dev,0),
pci_resource_len(pci_dev,0));

1
drivers/media/pci/saa7134/saa7134-ts.c
View File

@ -142,6 +142,7 @@ int saa7134_ts_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
*nbuffers = 3;
*nplanes = 1;
sizes[0] = size;
alloc_ctxs[0] = dev->alloc_ctx;
return 0;
}
EXPORT_SYMBOL_GPL(saa7134_ts_queue_setup);

1
drivers/media/pci/saa7134/saa7134-vbi.c
View File

@ -156,6 +156,7 @@ static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
*nbuffers = saa7134_buffer_count(size, *nbuffers);
*nplanes = 1;
sizes[0] = size;
alloc_ctxs[0] = dev->alloc_ctx;
return 0;
}

1
drivers/media/pci/saa7134/saa7134-video.c
View File

@ -932,6 +932,7 @@ static int queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
*nbuffers = saa7134_buffer_count(size, *nbuffers);
*nplanes = 1;
sizes[0] = size;
alloc_ctxs[0] = dev->alloc_ctx;
return 0;
}

1
drivers/media/pci/saa7134/saa7134.h
View File

@ -588,6 +588,7 @@ struct saa7134_dev {
/* video+ts+vbi capture */
void *alloc_ctx;
struct saa7134_dmaqueue video_q;
struct vb2_queue video_vbq;
struct saa7134_dmaqueue vbi_q;

10
drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
View File

@ -718,7 +718,10 @@ static int solo_enc_queue_setup(struct vb2_queue *q,
unsigned int *num_planes, unsigned int sizes[],
void *alloc_ctxs[])
{
struct solo_enc_dev *solo_enc = vb2_get_drv_priv(q);
sizes[0] = FRAME_BUF_SIZE;
alloc_ctxs[0] = solo_enc->alloc_ctx;
*num_planes = 1;
if (*num_buffers < MIN_VID_BUFFERS)
@ -1266,6 +1269,11 @@ static struct solo_enc_dev *solo_enc_alloc(struct solo_dev *solo_dev,
return ERR_PTR(-ENOMEM);
hdl = &solo_enc->hdl;
solo_enc->alloc_ctx = vb2_dma_sg_init_ctx(&solo_dev->pdev->dev);
if (IS_ERR(solo_enc->alloc_ctx)) {
ret = PTR_ERR(solo_enc->alloc_ctx);
goto hdl_free;
}
v4l2_ctrl_handler_init(hdl, 10);
v4l2_ctrl_new_std(hdl, &solo_ctrl_ops,
V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
@ -1369,6 +1377,7 @@ pci_free:
solo_enc->desc_items, solo_enc->desc_dma);
hdl_free:
v4l2_ctrl_handler_free(hdl);
vb2_dma_sg_cleanup_ctx(solo_enc->alloc_ctx);
kfree(solo_enc);
return ERR_PTR(ret);
}
@ -1383,6 +1392,7 @@ static void solo_enc_free(struct solo_enc_dev *solo_enc)
solo_enc->desc_items, solo_enc->desc_dma);
video_unregister_device(solo_enc->vfd);
v4l2_ctrl_handler_free(&solo_enc->hdl);
vb2_dma_sg_cleanup_ctx(solo_enc->alloc_ctx);
kfree(solo_enc);
}

1
drivers/media/pci/solo6x10/solo6x10.h
View File

@ -180,6 +180,7 @@ struct solo_enc_dev {
u32 sequence;
struct vb2_queue vidq;
struct list_head vidq_active;
void *alloc_ctx;
int desc_count;
int desc_nelts;
struct solo_p2m_desc *desc_items;

15
drivers/media/pci/tw68/tw68-core.c
View File

@ -304,13 +304,19 @@ static int tw68_initdev(struct pci_dev *pci_dev,
/* Then do any initialisation wanted before interrupts are on */
tw68_hw_init1(dev);
dev->alloc_ctx = vb2_dma_sg_init_ctx(&pci_dev->dev);
if (IS_ERR(dev->alloc_ctx)) {
err = PTR_ERR(dev->alloc_ctx);
goto fail3;
}
/* get irq */
err = devm_request_irq(&pci_dev->dev, pci_dev->irq, tw68_irq,
IRQF_SHARED, dev->name, dev);
if (err < 0) {
pr_err("%s: can't get IRQ %d\n",
dev->name, pci_dev->irq);
goto fail3;
goto fail4;
}
/*
@ -324,7 +330,7 @@ static int tw68_initdev(struct pci_dev *pci_dev,
if (err < 0) {
pr_err("%s: can't register video device\n",
dev->name);
goto fail4;
goto fail5;
}
tw_setl(TW68_INTMASK, dev->pci_irqmask);
@ -333,8 +339,10 @@ static int tw68_initdev(struct pci_dev *pci_dev,
return 0;
fail4:
fail5:
video_unregister_device(&dev->vdev);
fail4:
vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
fail3:
iounmap(dev->lmmio);
fail2:
@ -358,6 +366,7 @@ static void tw68_finidev(struct pci_dev *pci_dev)
/* unregister */
video_unregister_device(&dev->vdev);
v4l2_ctrl_handler_free(&dev->hdl);
vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
/* release resources */
iounmap(dev->lmmio);

1
drivers/media/pci/tw68/tw68-video.c
View File

@ -384,6 +384,7 @@ static int tw68_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
unsigned tot_bufs = q->num_buffers + *num_buffers;
sizes[0] = (dev->fmt->depth * dev->width * dev->height) >> 3;
alloc_ctxs[0] = dev->alloc_ctx;
/*
* We allow create_bufs, but only if the sizeimage is the same as the
* current sizeimage. The tw68_buffer_count calculation becomes quite

1
drivers/media/pci/tw68/tw68.h
View File

@ -181,6 +181,7 @@ struct tw68_dev {
unsigned field;
struct vb2_queue vidq;
struct list_head active;
void *alloc_ctx;
/* various v4l controls */
const struct tw68_tvnorm *tvnorm; /* video */

13
drivers/media/platform/marvell-ccic/mcam-core.c
View File

@ -1079,6 +1079,8 @@ static int mcam_vb_queue_setup(struct vb2_queue *vq,
*nbufs = minbufs;
if (cam->buffer_mode == B_DMA_contig)
alloc_ctxs[0] = cam->vb_alloc_ctx;
else if (cam->buffer_mode == B_DMA_sg)
alloc_ctxs[0] = cam->vb_alloc_ctx_sg;
return 0;
}
@ -1286,10 +1288,12 @@ static int mcam_setup_vb2(struct mcam_camera *cam)
vq->ops = &mcam_vb2_ops;
vq->mem_ops = &vb2_dma_contig_memops;
vq->buf_struct_size = sizeof(struct mcam_vb_buffer);
cam->vb_alloc_ctx = vb2_dma_contig_init_ctx(cam->dev);
vq->io_modes = VB2_MMAP | VB2_USERPTR;
cam->dma_setup = mcam_ctlr_dma_contig;
cam->frame_complete = mcam_dma_contig_done;
cam->vb_alloc_ctx = vb2_dma_contig_init_ctx(cam->dev);
if (IS_ERR(cam->vb_alloc_ctx))
return PTR_ERR(cam->vb_alloc_ctx);
#endif
break;
case B_DMA_sg:
@ -1300,6 +1304,9 @@ static int mcam_setup_vb2(struct mcam_camera *cam)
vq->io_modes = VB2_MMAP | VB2_USERPTR;
cam->dma_setup = mcam_ctlr_dma_sg;
cam->frame_complete = mcam_dma_sg_done;
cam->vb_alloc_ctx_sg = vb2_dma_sg_init_ctx(cam->dev);
if (IS_ERR(cam->vb_alloc_ctx_sg))
return PTR_ERR(cam->vb_alloc_ctx_sg);
#endif
break;
case B_vmalloc:
@ -1325,6 +1332,10 @@ static void mcam_cleanup_vb2(struct mcam_camera *cam)
if (cam->buffer_mode == B_DMA_contig)
vb2_dma_contig_cleanup_ctx(cam->vb_alloc_ctx);
#endif
#ifdef MCAM_MODE_DMA_SG
if (cam->buffer_mode == B_DMA_sg)
vb2_dma_sg_cleanup_ctx(cam->vb_alloc_ctx_sg);
#endif
}

1
drivers/media/platform/marvell-ccic/mcam-core.h
View File

@ -176,6 +176,7 @@ struct mcam_camera {
/* DMA buffers - DMA modes */
struct mcam_vb_buffer *vb_bufs[MAX_DMA_BUFS];
struct vb2_alloc_ctx *vb_alloc_ctx;
struct vb2_alloc_ctx *vb_alloc_ctx_sg;
/* Mode-specific ops, set at open time */
void (*dma_setup)(struct mcam_camera *cam);

32
drivers/media/v4l2-core/videobuf2-dma-sg.c
View File

@ -30,7 +30,12 @@ module_param(debug, int, 0644);
printk(KERN_DEBUG "vb2-dma-sg: " fmt, ## arg); \
} while (0)
struct vb2_dma_sg_conf {
struct device *dev;
};
struct vb2_dma_sg_buf {
struct device *dev;
void *vaddr;
struct page **pages;
int offset;
@ -89,10 +94,13 @@ static int vb2_dma_sg_alloc_compacted(struct vb2_dma_sg_buf *buf,
static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long size,
enum dma_data_direction dma_dir, gfp_t gfp_flags)
{
struct vb2_dma_sg_conf *conf = alloc_ctx;
struct vb2_dma_sg_buf *buf;
int ret;
int num_pages;
if (WARN_ON(alloc_ctx == NULL))
return NULL;
buf = kzalloc(sizeof *buf, GFP_KERNEL);
if (!buf)
return NULL;
@ -118,6 +126,8 @@ static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long size,
if (ret)
goto fail_table_alloc;
/* Prevent the device from being released while the buffer is used */
buf->dev = get_device(conf->dev);
buf->handler.refcount = &buf->refcount;
buf->handler.put = vb2_dma_sg_put;
buf->handler.arg = buf;
@ -153,6 +163,7 @@ static void vb2_dma_sg_put(void *buf_priv)
while (--i >= 0)
__free_page(buf->pages[i]);
kfree(buf->pages);
put_device(buf->dev);
kfree(buf);
}
}
@ -356,6 +367,27 @@ const struct vb2_mem_ops vb2_dma_sg_memops = {
};
EXPORT_SYMBOL_GPL(vb2_dma_sg_memops);
void *vb2_dma_sg_init_ctx(struct device *dev)
{
struct vb2_dma_sg_conf *conf;
conf = kzalloc(sizeof(*conf), GFP_KERNEL);
if (!conf)
return ERR_PTR(-ENOMEM);
conf->dev = dev;
return conf;
}
EXPORT_SYMBOL_GPL(vb2_dma_sg_init_ctx);
void vb2_dma_sg_cleanup_ctx(void *alloc_ctx)
{
if (!IS_ERR_OR_NULL(alloc_ctx))
kfree(alloc_ctx);
}
EXPORT_SYMBOL_GPL(vb2_dma_sg_cleanup_ctx);
MODULE_DESCRIPTION("dma scatter/gather memory handling routines for videobuf2");
MODULE_AUTHOR("Andrzej Pietrasiewicz");
MODULE_LICENSE("GPL");

3
include/media/videobuf2-dma-sg.h
View File

@ -21,6 +21,9 @@ static inline struct sg_table *vb2_dma_sg_plane_desc(
return (struct sg_table *)vb2_plane_cookie(vb, plane_no);
}
void *vb2_dma_sg_init_ctx(struct device *dev);
void vb2_dma_sg_cleanup_ctx(void *alloc_ctx);
extern const struct vb2_mem_ops vb2_dma_sg_memops;
#endif