Hi Kamil, On Fri, May 9, 2014 at 1:22 AM, Kamil Debski <k.debski@xxxxxxxxxxx> wrote: > Hi, > >> From: Arun Kumar K [mailto:arunkk.samsung@xxxxxxxxx] On Behalf Of Arun >> Kumar K >> Sent: Friday, March 21, 2014 9:37 AM >> >> From: Pawel Osciak <posciak@xxxxxxxxxxxx> >> >> Currently, we allocate private codec buffers on STREAMON, which may >> fail if we are out of memory. We don't check for failure though, which >> will make us crash with the codec accessing random memory. >> >> We shouldn't be failing STREAMON with out of memory errors though. So >> move the allocation of private codec buffers to REQBUFS for OUTPUT >> queue. Also, move MFC instance opening and closing to REQBUFS as well, >> as it's tied to allocation and deallocation of private codec buffers. >> >> Signed-off-by: Pawel Osciak <posciak@xxxxxxxxxxxx> >> Signed-off-by: Arun Kumar K <arun.kk@xxxxxxxxxxx> >> --- >> drivers/media/platform/s5p-mfc/s5p_mfc.c | 10 ++++----- >> drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c | 1 + >> drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 30 +++++++++++------ >> -------- >> 3 files changed, 19 insertions(+), 22 deletions(-) >> >> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc.c >> b/drivers/media/platform/s5p-mfc/s5p_mfc.c >> index 04030f5..4ee5a02 100644 >> --- a/drivers/media/platform/s5p-mfc/s5p_mfc.c >> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc.c >> @@ -637,8 +637,9 @@ static irqreturn_t s5p_mfc_irq(int irq, void *priv) >> goto irq_cleanup_hw; >> >> case S5P_MFC_R2H_CMD_CLOSE_INSTANCE_RET: >> - clear_work_bit(ctx); >> + ctx->inst_no = MFC_NO_INSTANCE_SET; >> ctx->state = MFCINST_FREE; >> + clear_work_bit(ctx); >> wake_up(&ctx->queue); > > I have the impression that work bit first should be cleared and then > changes made to the context. While I agree it's probably a good idea, it shouldn't matter here. This irq comes after processing with hw_lock being held. clear_work_bit() influences the decision made under the same lock in try_run when choosing the next instance to run. > > clear_work_bit(ctx); > + ctx->inst_no = MFC_NO_INSTANCE_SET; > ctx->state = MFCINST_FREE; > >> goto irq_cleanup_hw; >> >> @@ -758,7 +759,7 @@ static int s5p_mfc_open(struct file *file) >> goto err_bad_node; >> } >> ctx->fh.ctrl_handler = &ctx->ctrl_handler; >> - ctx->inst_no = -1; >> + ctx->inst_no = MFC_NO_INSTANCE_SET; >> /* Load firmware if this is the first instance */ >> if (dev->num_inst == 1) { >> dev->watchdog_timer.expires = jiffies + @@ -868,12 +869,11 >> @@ static int s5p_mfc_release(struct file *file) >> vb2_queue_release(&ctx->vq_dst); >> /* Mark context as idle */ >> clear_work_bit_irqsave(ctx); >> - /* If instance was initialised then >> + /* If instance was initialised and not yet freed, >> * return instance and free resources */ >> - if (ctx->inst_no != MFC_NO_INSTANCE_SET) { >> + if (ctx->state != MFCINST_FREE && ctx->state != MFCINST_INIT) { >> mfc_debug(2, "Has to free instance\n"); >> s5p_mfc_close_mfc_inst(dev, ctx); >> - ctx->inst_no = MFC_NO_INSTANCE_SET; >> } >> /* hardware locking scheme */ >> if (dev->curr_ctx == ctx->num) >> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c >> b/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c >> index ccbfcb3..865e9e0 100644 >> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c >> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c >> @@ -461,5 +461,6 @@ void s5p_mfc_close_mfc_inst(struct s5p_mfc_dev *dev, >> struct s5p_mfc_ctx *ctx) >> if (ctx->type == MFCINST_DECODER) >> s5p_mfc_hw_call(dev->mfc_ops, release_dec_desc_buffer, ctx); >> >> + ctx->inst_no = MFC_NO_INSTANCE_SET; >> ctx->state = MFCINST_FREE; >> } >> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c >> b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c >> index efc78ae..4586186 100644 >> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c >> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c >> @@ -475,11 +475,11 @@ static int reqbufs_output(struct s5p_mfc_dev *dev, >> struct s5p_mfc_ctx *ctx, >> ret = vb2_reqbufs(&ctx->vq_src, reqbufs); >> if (ret) >> goto out; >> + s5p_mfc_close_mfc_inst(dev, ctx); >> ctx->src_bufs_cnt = 0; >> + ctx->output_state = QUEUE_FREE; >> } else if (ctx->output_state == QUEUE_FREE) { >> - /* Can only request buffers after the instance >> - * has been opened. >> - */ >> + /* Can only request buffers when we have a valid format set. >> */ >> WARN_ON(ctx->src_bufs_cnt != 0); >> if (ctx->state != MFCINST_INIT) { >> mfc_err("Reqbufs called in an invalid state\n"); @@ > - >> 493,6 +493,13 @@ static int reqbufs_output(struct s5p_mfc_dev *dev, >> struct s5p_mfc_ctx *ctx, >> if (ret) >> goto out; >> >> + ret = s5p_mfc_open_mfc_inst(dev, ctx); >> + if (ret) { >> + reqbufs->count = 0; >> + vb2_reqbufs(&ctx->vq_src, reqbufs); >> + goto out; >> + } >> + >> ctx->output_state = QUEUE_BUFS_REQUESTED; >> } else { >> mfc_err("Buffers have already been requested\n"); @@ -594,7 >> +601,7 @@ static int vidioc_querybuf(struct file *file, void *priv, >> return -EINVAL; >> } >> mfc_debug(2, "State: %d, buf->type: %d\n", ctx->state, buf->type); >> - if (ctx->state == MFCINST_INIT && >> + if (ctx->state == MFCINST_GOT_INST && >> buf->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { >> ret = vb2_querybuf(&ctx->vq_src, buf); >> } else if (ctx->state == MFCINST_RUNNING && @@ -670,24 +677,13 @@ >> static int vidioc_streamon(struct file *file, void *priv, >> enum v4l2_buf_type type) >> { >> struct s5p_mfc_ctx *ctx = fh_to_ctx(priv); >> - struct s5p_mfc_dev *dev = ctx->dev; >> int ret = -EINVAL; >> >> mfc_debug_enter(); >> - if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { >> - if (ctx->state == MFCINST_INIT) { >> - ctx->dst_bufs_cnt = 0; >> - ctx->src_bufs_cnt = 0; >> - ctx->capture_state = QUEUE_FREE; >> - ctx->output_state = QUEUE_FREE; >> - ret = s5p_mfc_open_mfc_inst(dev, ctx); >> - if (ret) >> - return ret; >> - } >> + if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) >> ret = vb2_streamon(&ctx->vq_src, type); >> - } else if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { >> + else if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) >> ret = vb2_streamon(&ctx->vq_dst, type); >> - } >> mfc_debug_leave(); >> return ret; >> } >> -- >> 1.7.9.5 > > Best wishes, > -- > Kamil Debski > Samsung R&D Institute Poland > -- 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
