On Wed, Feb 24, 2010 at 12:37 AM, Hiremath, Vaibhav <hvaibhav@xxxxxx> wrote: > >> -----Original Message----- >> From: Muralidharan Karicheri [mailto:mkaricheri@xxxxxxxxx] >> Sent: Wednesday, February 24, 2010 4:53 AM >> To: Hiremath, Vaibhav >> Cc: linux-media@xxxxxxxxxxxxxxx; linux-omap@xxxxxxxxxxxxxxx; >> hverkuil@xxxxxxxxx; Karicheri, Muralidharan >> Subject: Re: [PATCH-V1 09/10] VPFE Capture: Add support for USERPTR mode of >> operation >> >> Vaibhav, >> >> There are changes to vpfe capture on Arago tree on top of this. For >> example, vpfe_uservirt_to_phys() is removed and is replaced with >> videobuf_iolock(). So please get the latest changes to upstream. >> > [Hiremath, Vaibhav] No, the Arago version doesn't support USERPTR mode at all, Probably you are referring to the wrong tree. This code has gone through test cycles and I prefer re-using the code as much as possible. Check out below... http://arago-project.org/git/people/sneha/linux-davinci-staging.git My linux-davinci-video.git tree just track the upstream... Murali > > > 1386 if (V4L2_MEMORY_USERPTR == req_buf->memory) { > 1386 /* we don't support user ptr IO */ > 1387 v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs:" > 1388 " USERPTR IO not supported\n"); > 1389 return -EINVAL; > 1390 } > > And also, I have received important comment from Mauro, which expects some code tobe moved to generic VideoBuf layer. I will be submitting patch for the same separately. > > Thanks, > Vaibhav > >> Murali >> >> On Tue, Feb 23, 2010 at 3:34 AM, <hvaibhav@xxxxxx> wrote: >> > From: Vaibhav Hiremath <hvaibhav@xxxxxx> >> > >> > >> > Signed-off-by: Vaibhav Hiremath <hvaibhav@xxxxxx> >> > Signed-off-by: Muralidharan Karicheri <m-karicheri2@xxxxxx> >> > --- >> > drivers/media/video/ti-media/vpfe_capture.c | 94 >> ++++++++++++++++++++++---- >> > 1 files changed, 79 insertions(+), 15 deletions(-) >> > >> > diff --git a/drivers/media/video/ti-media/vpfe_capture.c >> b/drivers/media/video/ti-media/vpfe_capture.c >> > index cece265..7d4ab44 100644 >> > --- a/drivers/media/video/ti-media/vpfe_capture.c >> > +++ b/drivers/media/video/ti-media/vpfe_capture.c >> > @@ -538,7 +538,24 @@ static void vpfe_schedule_next_buffer(struct >> vpfe_device *vpfe_dev) >> > struct videobuf_buffer, queue); >> > list_del(&vpfe_dev->next_frm->queue); >> > vpfe_dev->next_frm->state = VIDEOBUF_ACTIVE; >> > - addr = videobuf_to_dma_contig(vpfe_dev->next_frm); >> > + if (V4L2_MEMORY_USERPTR == vpfe_dev->memory) >> > + addr = vpfe_dev->cur_frm->boff; >> > + else >> > + addr = videobuf_to_dma_contig(vpfe_dev->next_frm); >> > + >> > + ccdc_dev->hw_ops.setfbaddr(addr); >> > +} >> > + >> > +static void vpfe_schedule_bottom_field(struct vpfe_device *vpfe_dev) >> > +{ >> > + unsigned long addr; >> > + >> > + if (V4L2_MEMORY_USERPTR == vpfe_dev->memory) >> > + addr = vpfe_dev->cur_frm->boff; >> > + else >> > + addr = videobuf_to_dma_contig(vpfe_dev->cur_frm); >> > + >> > + addr += vpfe_dev->field_off; >> > ccdc_dev->hw_ops.setfbaddr(addr); >> > } >> > >> > @@ -559,7 +576,6 @@ static irqreturn_t vpfe_isr(int irq, void *dev_id) >> > { >> > struct vpfe_device *vpfe_dev = dev_id; >> > enum v4l2_field field; >> > - unsigned long addr; >> > int fid; >> > >> > v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "\nStarting >> vpfe_isr...\n"); >> > @@ -604,10 +620,7 @@ static irqreturn_t vpfe_isr(int irq, void *dev_id) >> > * the CCDC memory address >> > */ >> > if (field == V4L2_FIELD_SEQ_TB) { >> > - addr = >> > - videobuf_to_dma_contig(vpfe_dev- >> >cur_frm); >> > - addr += vpfe_dev->field_off; >> > - ccdc_dev->hw_ops.setfbaddr(addr); >> > + vpfe_schedule_bottom_field(vpfe_dev); >> > } >> > goto clear_intr; >> > } >> > @@ -1234,7 +1247,10 @@ static int vpfe_videobuf_setup(struct >> videobuf_queue *vq, >> > struct vpfe_device *vpfe_dev = fh->vpfe_dev; >> > >> > v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_buffer_setup\n"); >> > - *size = config_params.device_bufsize; >> > + *size = vpfe_dev->fmt.fmt.pix.sizeimage; >> > + if (vpfe_dev->memory == V4L2_MEMORY_MMAP && >> > + vpfe_dev->fmt.fmt.pix.sizeimage > >> config_params.device_bufsize) >> > + *size = config_params.device_bufsize; >> > >> > if (*count < config_params.min_numbuffers) >> > *count = config_params.min_numbuffers; >> > @@ -1243,6 +1259,46 @@ static int vpfe_videobuf_setup(struct >> videobuf_queue *vq, >> > return 0; >> > } >> > >> > +/* >> > + * vpfe_uservirt_to_phys: This function is used to convert user >> > + * space virtual address to physical address. >> > + */ >> > +static u32 vpfe_uservirt_to_phys(struct vpfe_device *vpfe_dev, u32 virtp) >> > +{ >> > + struct mm_struct *mm = current->mm; >> > + unsigned long physp = 0; >> > + struct vm_area_struct *vma; >> > + >> > + vma = find_vma(mm, virtp); >> > + >> > + /* For kernel direct-mapped memory, take the easy way */ >> > + if (virtp >= PAGE_OFFSET) >> > + physp = virt_to_phys((void *)virtp); >> > + else if (vma && (vma->vm_flags & VM_IO) && (vma->vm_pgoff)) >> > + /* this will catch, kernel-allocated, mmaped-to-usermode >> addr */ >> > + physp = (vma->vm_pgoff << PAGE_SHIFT) + (virtp - vma- >> >vm_start); >> > + else { >> > + /* otherwise, use get_user_pages() for general userland >> pages */ >> > + int res, nr_pages = 1; >> > + struct page *pages; >> > + down_read(¤t->mm->mmap_sem); >> > + >> > + res = get_user_pages(current, current->mm, >> > + virtp, nr_pages, 1, 0, &pages, NULL); >> > + up_read(¤t->mm->mmap_sem); >> > + >> > + if (res == nr_pages) >> > + physp = __pa(page_address(&pages[0]) + >> > + (virtp & ~PAGE_MASK)); >> > + else { >> > + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, >> > + "get_user_pages failed\n"); >> > + return 0; >> > + } >> > + } >> > + return physp; >> > +} >> > + >> > static int vpfe_videobuf_prepare(struct videobuf_queue *vq, >> > struct videobuf_buffer *vb, >> > enum v4l2_field field) >> > @@ -1259,6 +1315,18 @@ static int vpfe_videobuf_prepare(struct >> videobuf_queue *vq, >> > vb->size = vpfe_dev->fmt.fmt.pix.sizeimage; >> > vb->field = field; >> > } >> > + >> > + if (V4L2_MEMORY_USERPTR == vpfe_dev->memory) { >> > + if (!vb->baddr) { >> > + v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, >> > + "buffer address is 0\n"); >> > + return -EINVAL; >> > + } >> > + vb->boff = vpfe_uservirt_to_phys(vpfe_dev, vb->baddr); >> > + /* Make sure user addresses are aligned to 32 bytes */ >> > + if (!ALIGN(vb->boff, 32)) >> > + return -EINVAL; >> > + } >> > vb->state = VIDEOBUF_PREPARED; >> > return 0; >> > } >> > @@ -1327,13 +1395,6 @@ static int vpfe_reqbufs(struct file *file, void >> *priv, >> > return -EINVAL; >> > } >> > >> > - if (V4L2_MEMORY_USERPTR == req_buf->memory) { >> > - /* we don't support user ptr IO */ >> > - v4l2_dbg(1, debug, &vpfe_dev->v4l2_dev, "vpfe_reqbufs:" >> > - " USERPTR IO not supported\n"); >> > - return -EINVAL; >> > - } >> > - >> > ret = mutex_lock_interruptible(&vpfe_dev->lock); >> > if (ret) >> > return ret; >> > @@ -1541,7 +1602,10 @@ static int vpfe_streamon(struct file *file, void >> *priv, >> > vpfe_dev->cur_frm->state = VIDEOBUF_ACTIVE; >> > /* Initialize field_id and started member */ >> > vpfe_dev->field_id = 0; >> > - addr = videobuf_to_dma_contig(vpfe_dev->cur_frm); >> > + if (V4L2_MEMORY_USERPTR == vpfe_dev->memory) >> > + addr = vpfe_dev->cur_frm->boff; >> > + else >> > + addr = videobuf_to_dma_contig(vpfe_dev->cur_frm); >> > >> > /* Calculate field offset */ >> > vpfe_calculate_offsets(vpfe_dev); >> > -- >> > 1.6.2.4 >> > >> > -- >> > To unsubscribe from this list: send the line "unsubscribe linux-media" in >> > the body of a message to majordomo@xxxxxxxxxxxxxxx >> > More majordomo info at http://vger.kernel.org/majordomo-info.html >> > >> >> >> >> -- >> Murali Karicheri >> mkaricheri@xxxxxxxxx > -- Murali Karicheri mkaricheri@xxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
