From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
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@xxxxxxxxx>
---
drivers/media/pci/cx23885/cx23885-417.c | 1 +
drivers/media/pci/cx23885/cx23885-core.c | 10 +++++-
drivers/media/pci/cx23885/cx23885-dvb.c | 1 +
drivers/media/pci/cx23885/cx23885-vbi.c | 1 +
drivers/media/pci/cx23885/cx23885-video.c | 1 +
drivers/media/pci/cx23885/cx23885.h | 1 +
drivers/media/pci/saa7134/saa7134-core.c | 18 +++++++---
drivers/media/pci/saa7134/saa7134-ts.c | 1 +
drivers/media/pci/saa7134/saa7134-vbi.c | 1 +
drivers/media/pci/saa7134/saa7134-video.c | 1 +
drivers/media/pci/saa7134/saa7134.h | 1 +
drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c | 10 ++++++
drivers/media/pci/solo6x10/solo6x10.h | 1 +
drivers/media/pci/tw68/tw68-core.c | 15 +++++++--
drivers/media/pci/tw68/tw68-video.c | 1 +
drivers/media/pci/tw68/tw68.h | 1 +
drivers/media/platform/marvell-ccic/mcam-core.c | 7 ++++
drivers/media/platform/marvell-ccic/mcam-core.h | 1 +
drivers/media/v4l2-core/videobuf2-core.c | 3 +-
drivers/media/v4l2-core/videobuf2-dma-contig.c | 4 ++-
drivers/media/v4l2-core/videobuf2-dma-sg.c | 44 +++++++++++++++++++++++--
drivers/media/v4l2-core/videobuf2-vmalloc.c | 3 +-
include/media/videobuf2-core.h | 3 +-
include/media/videobuf2-dma-sg.h | 3 ++
24 files changed, 118 insertions(+), 15 deletions(-)
diff --git a/drivers/media/pci/cx23885/cx23885-417.c b/drivers/media/pci/cx23885/cx23885-417.c
index 3948db3..d72a3ec 100644
--- a/drivers/media/pci/cx23885/cx23885-417.c
+++ b/drivers/media/pci/cx23885/cx23885-417.c
@@ -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;
}
diff --git a/drivers/media/pci/cx23885/cx23885-core.c b/drivers/media/pci/cx23885/cx23885-core.c
index 331edda..0451522 100644
--- a/drivers/media/pci/cx23885/cx23885-core.c
+++ b/drivers/media/pci/cx23885/cx23885-core.c
@@ -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 = -ENOMEM;
+ 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);
diff --git a/drivers/media/pci/cx23885/cx23885-dvb.c b/drivers/media/pci/cx23885/cx23885-dvb.c
index 13734b8..27f88e4 100644
--- a/drivers/media/pci/cx23885/cx23885-dvb.c
+++ b/drivers/media/pci/cx23885/cx23885-dvb.c
@@ -101,6 +101,7 @@ 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;
}
diff --git a/drivers/media/pci/cx23885/cx23885-vbi.c b/drivers/media/pci/cx23885/cx23885-vbi.c
index a7c6ef8..1d339a6 100644
--- a/drivers/media/pci/cx23885/cx23885-vbi.c
+++ b/drivers/media/pci/cx23885/cx23885-vbi.c
@@ -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;
}
diff --git a/drivers/media/pci/cx23885/cx23885-video.c b/drivers/media/pci/cx23885/cx23885-video.c
index 682a4f9..1b04ab3 100644
--- a/drivers/media/pci/cx23885/cx23885-video.c
+++ b/drivers/media/pci/cx23885/cx23885-video.c
@@ -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;
}
diff --git a/drivers/media/pci/cx23885/cx23885.h b/drivers/media/pci/cx23885/cx23885.h
index 6c35e61..b5f109b 100644
--- a/drivers/media/pci/cx23885/cx23885.h
+++ b/drivers/media/pci/cx23885/cx23885.h
@@ -418,6 +418,7 @@ struct cx23885_dev {
struct vb2_queue vb2_vidq;
struct cx23885_dmaqueue vbiq;
struct vb2_queue vb2_vbiq;
+ void *alloc_ctx;
spinlock_t slock;
diff --git a/drivers/media/pci/saa7134/saa7134-core.c b/drivers/media/pci/saa7134/saa7134-core.c
index 236ed72..4f166c5 100644
--- a/drivers/media/pci/saa7134/saa7134-core.c
+++ b/drivers/media/pci/saa7134/saa7134-core.c
@@ -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 = -ENOMEM;
+ 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));
diff --git a/drivers/media/pci/saa7134/saa7134-ts.c b/drivers/media/pci/saa7134/saa7134-ts.c
index bd25323..8eff4a7 100644
--- a/drivers/media/pci/saa7134/saa7134-ts.c
+++ b/drivers/media/pci/saa7134/saa7134-ts.c
@@ -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);
diff --git a/drivers/media/pci/saa7134/saa7134-vbi.c b/drivers/media/pci/saa7134/saa7134-vbi.c
index 4f0b101..e2cc684 100644
--- a/drivers/media/pci/saa7134/saa7134-vbi.c
+++ b/drivers/media/pci/saa7134/saa7134-vbi.c
@@ -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;
}
diff --git a/drivers/media/pci/saa7134/saa7134-video.c b/drivers/media/pci/saa7134/saa7134-video.c
index fc4a427..ba02995 100644
--- a/drivers/media/pci/saa7134/saa7134-video.c
+++ b/drivers/media/pci/saa7134/saa7134-video.c
@@ -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;
}
diff --git a/drivers/media/pci/saa7134/saa7134.h b/drivers/media/pci/saa7134/saa7134.h
index 1a82dd0..c644c7d 100644
--- a/drivers/media/pci/saa7134/saa7134.h
+++ b/drivers/media/pci/saa7134/saa7134.h
@@ -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;
diff --git a/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c b/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
index 28023f9..0517fc9 100644
--- a/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
+++ b/drivers/media/pci/solo6x10/solo6x10-v4l2-enc.c
@@ -720,7 +720,10 @@ 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)
@@ -1263,6 +1266,11 @@ 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 = -ENOMEM;
+ goto hdl_free;
+ }
v4l2_ctrl_handler_init(hdl, 10);
v4l2_ctrl_new_std(hdl, &solo_ctrl_ops,
V4L2_CID_BRIGHTNESS, 0, 255, 1, 128);
@@ -1366,6 +1374,7 @@ 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);
}
@@ -1377,6 +1386,7 @@ static void solo_enc_free(struct solo_enc_dev *solo_enc)
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);
}
diff --git a/drivers/media/pci/solo6x10/solo6x10.h b/drivers/media/pci/solo6x10/solo6x10.h
index 72017b7..bd8edfa 100644
--- a/drivers/media/pci/solo6x10/solo6x10.h
+++ b/drivers/media/pci/solo6x10/solo6x10.h
@@ -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;
diff --git a/drivers/media/pci/tw68/tw68-core.c b/drivers/media/pci/tw68/tw68-core.c
index a6fb48c..c505fe0 100644
--- a/drivers/media/pci/tw68/tw68-core.c
+++ b/drivers/media/pci/tw68/tw68-core.c
@@ -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 = -ENOMEM;
+ goto fail3;
+ }
+
/* get irq */
err = devm_request_irq(&pci_dev->dev, pci_dev->irq, tw68_irq,
IRQF_SHARED | IRQF_DISABLED, 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);
diff --git a/drivers/media/pci/tw68/tw68-video.c b/drivers/media/pci/tw68/tw68-video.c
index 5c94ac7..50dcce6 100644
--- a/drivers/media/pci/tw68/tw68-video.c
+++ b/drivers/media/pci/tw68/tw68-video.c
@@ -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
diff --git a/drivers/media/pci/tw68/tw68.h b/drivers/media/pci/tw68/tw68.h
index 2c8abe2..7a7501b 100644
--- a/drivers/media/pci/tw68/tw68.h
+++ b/drivers/media/pci/tw68/tw68.h
@@ -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 */
diff --git a/drivers/media/platform/marvell-ccic/mcam-core.c b/drivers/media/platform/marvell-ccic/mcam-core.c
index 7a86c77..20d53b6 100644
--- a/drivers/media/platform/marvell-ccic/mcam-core.c
+++ b/drivers/media/platform/marvell-ccic/mcam-core.c
@@ -1080,6 +1080,8 @@ 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;
}
@@ -1298,6 +1300,7 @@ static int mcam_setup_vb2(struct mcam_camera *cam)
vq->ops = &mcam_vb2_sg_ops;
vq->mem_ops = &vb2_dma_sg_memops;
vq->buf_struct_size = sizeof(struct mcam_vb_buffer);
+ cam->vb_alloc_ctx_sg = vb2_dma_sg_init_ctx(cam->dev);
vq->io_modes = VB2_MMAP | VB2_USERPTR;
cam->dma_setup = mcam_ctlr_dma_sg;
cam->frame_complete = mcam_dma_sg_done;
@@ -1326,6 +1329,10 @@ 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
}
diff --git a/drivers/media/platform/marvell-ccic/mcam-core.h b/drivers/media/platform/marvell-ccic/mcam-core.h
index e0e628c..7b8c201 100644
--- a/drivers/media/platform/marvell-ccic/mcam-core.h
+++ b/drivers/media/platform/marvell-ccic/mcam-core.h
@@ -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);
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index f2e43de..490defb 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -189,6 +189,7 @@ static void __vb2_queue_cancel(struct vb2_queue *q);
static int __vb2_buf_mem_alloc(struct vb2_buffer *vb)
{
struct vb2_queue *q = vb->vb2_queue;
+ int write = !V4L2_TYPE_IS_OUTPUT(q->type);
void *mem_priv;
int plane;
@@ -200,7 +201,7 @@ static int __vb2_buf_mem_alloc(struct vb2_buffer *vb)
unsigned long size = PAGE_ALIGN(q->plane_sizes[plane]);
mem_priv = call_ptr_memop(vb, alloc, q->alloc_ctx[plane],
- size, q->gfp_flags);
+ size, write, q->gfp_flags);
if (IS_ERR_OR_NULL(mem_priv))
goto free;
diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c
index 4a02ade..6675f12 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-contig.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c
@@ -155,7 +155,8 @@ static void vb2_dc_put(void *buf_priv)
kfree(buf);
}
-static void *vb2_dc_alloc(void *alloc_ctx, unsigned long size, gfp_t gfp_flags)
+static void *vb2_dc_alloc(void *alloc_ctx, unsigned long size, int write,
+ gfp_t gfp_flags)
{
struct vb2_dc_conf *conf = alloc_ctx;
struct device *dev = conf->dev;
@@ -176,6 +177,7 @@ static void *vb2_dc_alloc(void *alloc_ctx, unsigned long size, gfp_t gfp_flags)
/* Prevent the device from being released while the buffer is used */
buf->dev = get_device(dev);
buf->size = size;
+ buf->dma_dir = write ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
buf->handler.refcount = &buf->refcount;
buf->handler.put = vb2_dc_put;
diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c b/drivers/media/v4l2-core/videobuf2-dma-sg.c
index 9b163a4..ff77be7 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-sg.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c
@@ -30,11 +30,17 @@ 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 write;
int offset;
+ enum dma_data_direction dma_dir;
struct sg_table sg_table;
size_t size;
unsigned int num_pages;
@@ -86,22 +92,27 @@ static int vb2_dma_sg_alloc_compacted(struct vb2_dma_sg_buf *buf,
return 0;
}
-static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long size, gfp_t gfp_flags)
+static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long size, int write,
+ 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;
buf->vaddr = NULL;
- buf->write = 0;
+ buf->write = write;
buf->offset = 0;
buf->size = size;
/* size is already page aligned */
buf->num_pages = size >> PAGE_SHIFT;
+ buf->dma_dir = write ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
buf->pages = kzalloc(buf->num_pages * sizeof(struct page *),
GFP_KERNEL);
@@ -117,6 +128,8 @@ static void *vb2_dma_sg_alloc(void *alloc_ctx, unsigned long size, gfp_t gfp_fla
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;
@@ -152,6 +165,7 @@ 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);
}
}
@@ -164,6 +178,7 @@ static inline int vma_is_io(struct vm_area_struct *vma)
static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr,
unsigned long size, int write)
{
+ struct vb2_dma_sg_conf *conf = alloc_ctx;
struct vb2_dma_sg_buf *buf;
unsigned long first, last;
int num_pages_from_user;
@@ -177,6 +192,7 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr,
buf->write = write;
buf->offset = vaddr & ~PAGE_MASK;
buf->size = size;
+ buf->dma_dir = write ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
first = (vaddr & PAGE_MASK) >> PAGE_SHIFT;
last = ((vaddr + size - 1) & PAGE_MASK) >> PAGE_SHIFT;
@@ -233,6 +249,8 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr,
buf->num_pages, buf->offset, size, 0))
goto userptr_fail_alloc_table_from_pages;
+ /* Prevent the device from being released while the buffer is used */
+ buf->dev = get_device(conf->dev);
return buf;
userptr_fail_alloc_table_from_pages:
@@ -272,6 +290,7 @@ static void vb2_dma_sg_put_userptr(void *buf_priv)
}
kfree(buf->pages);
vb2_put_vma(buf->vma);
+ put_device(buf->dev);
kfree(buf);
}
@@ -354,6 +373,27 @@ 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");
diff --git a/drivers/media/v4l2-core/videobuf2-vmalloc.c b/drivers/media/v4l2-core/videobuf2-vmalloc.c
index 313d977..d77e397 100644
--- a/drivers/media/v4l2-core/videobuf2-vmalloc.c
+++ b/drivers/media/v4l2-core/videobuf2-vmalloc.c
@@ -35,7 +35,8 @@ struct vb2_vmalloc_buf {
static void vb2_vmalloc_put(void *buf_priv);
-static void *vb2_vmalloc_alloc(void *alloc_ctx, unsigned long size, gfp_t gfp_flags)
+static void *vb2_vmalloc_alloc(void *alloc_ctx, unsigned long size, int write,
+ gfp_t gfp_flags)
{
struct vb2_vmalloc_buf *buf;
diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index 70ace7c..49e278b 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -82,7 +82,8 @@ struct vb2_threadio_data;
* unmap_dmabuf.
*/
struct vb2_mem_ops {
- void *(*alloc)(void *alloc_ctx, unsigned long size, gfp_t gfp_flags);
+ void *(*alloc)(void *alloc_ctx, unsigned long size, int write,
+ gfp_t gfp_flags);
void (*put)(void *buf_priv);
struct dma_buf *(*get_dmabuf)(void *buf_priv, unsigned long flags);
diff --git a/include/media/videobuf2-dma-sg.h b/include/media/videobuf2-dma-sg.h
index 7b89852..14ce306 100644
--- a/include/media/videobuf2-dma-sg.h
+++ b/include/media/videobuf2-dma-sg.h
@@ -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
--
2.1.1
--
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