| Message ID | 1502903951-5403-12-git-send-email-sricharan@codeaurora.org (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
On 8/16/2017 10:49 PM, Sricharan R wrote: > So previously on request from remote side, we allocated local > intent buffers and passed the ids to the remote. Now when > we receive data buffers from remote directed to that intent > id, copy the data to the corresponding preallocated intent > buffer. > > Signed-off-by: Sricharan R <sricharan@codeaurora.org> > Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> > --- > drivers/rpmsg/qcom_glink_native.c | 75 ++++++++++++++++++++++++++------------- > 1 file changed, 50 insertions(+), 25 deletions(-) > > diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c > index cbc9f9e..d6aa589 100644 > --- a/drivers/rpmsg/qcom_glink_native.c > +++ b/drivers/rpmsg/qcom_glink_native.c > @@ -160,7 +160,7 @@ struct glink_channel { > spinlock_t intent_lock; > struct idr liids; > > - void *buf; > + struct glink_core_rx_intent *buf; > int buf_offset; > int buf_size; > > @@ -607,6 +607,7 @@ static int qcom_glink_rx_defer(struct qcom_glink *glink, size_t extra) > > static int qcom_glink_rx_data(struct qcom_glink *glink, size_t avail) > { > + struct glink_core_rx_intent *intent; > struct glink_channel *channel; > struct { > struct glink_msg msg; > @@ -616,6 +617,8 @@ static int qcom_glink_rx_data(struct qcom_glink *glink, size_t avail) > unsigned int chunk_size; > unsigned int left_size; > unsigned int rcid; > + unsigned int liid; > + int ret = 0; > unsigned long flags; > > if (avail < sizeof(hdr)) { > @@ -643,56 +646,78 @@ static int qcom_glink_rx_data(struct qcom_glink *glink, size_t avail) > dev_dbg(glink->dev, "Data on non-existing channel\n"); > > /* Drop the message */ > - qcom_glink_rx_advance(glink, > - ALIGN(sizeof(hdr) + chunk_size, 8)); > - return 0; > + goto advance_rx; > } > > - /* Might have an ongoing, fragmented, message to append */ > - if (!channel->buf) { > - channel->buf = kmalloc(chunk_size + left_size, GFP_ATOMIC); > - if (!channel->buf) > - return -ENOMEM; > + if (glink->intentless) { > + /* Might have an ongoing, fragmented, message to append */ > + if (!channel->buf) { > + intent = kzalloc(sizeof(*intent), GFP_ATOMIC); > + if (!intent) > + return -ENOMEM; > + > + intent->data = kmalloc(chunk_size + left_size, > + GFP_ATOMIC); Who is supposed to free the intent and intent->data memory ? > + if (!intent->data) { > + kfree(intent); > + return -ENOMEM; > + } > + > + intent->id = 0xbabababa; > + intent->size = chunk_size + left_size; > + intent->offset = 0; > + > + channel->buf = intent; > + } else { > + intent = channel->buf; > + } > + } else { > + liid = le32_to_cpu(hdr.msg.param2); > > - channel->buf_size = chunk_size + left_size; > - channel->buf_offset = 0; > - } > + spin_lock_irqsave(&channel->intent_lock, flags); > + intent = idr_find(&channel->liids, liid); > + spin_unlock_irqrestore(&channel->intent_lock, flags); > > - qcom_glink_rx_advance(glink, sizeof(hdr)); > + if (!intent) { > + dev_err(glink->dev, > + "no intent found for channel %s intent %d", > + channel->name, liid); > + goto advance_rx; > + } > + } > > - if (channel->buf_size - channel->buf_offset < chunk_size) { > - dev_err(glink->dev, "Insufficient space in input buffer\n"); > + if (intent->size - intent->offset < chunk_size) { > + dev_err(glink->dev, "Insufficient space in intent\n"); > > /* The packet header lied, drop payload */ > - qcom_glink_rx_advance(glink, chunk_size); > - return -ENOMEM; > + goto advance_rx; > } > > - qcom_glink_rx_peak(glink, channel->buf + channel->buf_offset, > + qcom_glink_rx_advance(glink, ALIGN(sizeof(hdr), 8)); > + qcom_glink_rx_peak(glink, intent->data + intent->offset, > chunk_size); > - channel->buf_offset += chunk_size; > + intent->offset += chunk_size; > > /* Handle message when no fragments remain to be received */ > if (!left_size) { > spin_lock(&channel->recv_lock); > if (channel->ept.cb) { > channel->ept.cb(channel->ept.rpdev, > - channel->buf, > - channel->buf_offset, > + intent->data, > + intent->offset, > channel->ept.priv, > RPMSG_ADDR_ANY); > } > spin_unlock(&channel->recv_lock); > > - kfree(channel->buf); > + intent->offset = 0; > channel->buf = NULL; > - channel->buf_size = 0; > } > > - /* Each message starts at 8 byte aligned address */ > +advance_rx: > qcom_glink_rx_advance(glink, ALIGN(chunk_size, 8)); > > - return 0; > + return ret; > } > > static int qcom_glink_rx_open_ack(struct qcom_glink *glink, unsigned int lcid) -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi, <snip..> >> - /* Might have an ongoing, fragmented, message to append */ >> - if (!channel->buf) { >> - channel->buf = kmalloc(chunk_size + left_size, GFP_ATOMIC); >> - if (!channel->buf) >> - return -ENOMEM; >> + if (glink->intentless) { >> + /* Might have an ongoing, fragmented, message to append */ >> + if (!channel->buf) { >> + intent = kzalloc(sizeof(*intent), GFP_ATOMIC); >> + if (!intent) >> + return -ENOMEM; >> + >> + intent->data = kmalloc(chunk_size + left_size, >> + GFP_ATOMIC); > > Who is supposed to free the intent and intent->data memory ? Well, that's done as a part of the rx_done_work. Regards, Sricharan
diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index cbc9f9e..d6aa589 100644 --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -160,7 +160,7 @@ struct glink_channel { spinlock_t intent_lock; struct idr liids; - void *buf; + struct glink_core_rx_intent *buf; int buf_offset; int buf_size; @@ -607,6 +607,7 @@ static int qcom_glink_rx_defer(struct qcom_glink *glink, size_t extra) static int qcom_glink_rx_data(struct qcom_glink *glink, size_t avail) { + struct glink_core_rx_intent *intent; struct glink_channel *channel; struct { struct glink_msg msg; @@ -616,6 +617,8 @@ static int qcom_glink_rx_data(struct qcom_glink *glink, size_t avail) unsigned int chunk_size; unsigned int left_size; unsigned int rcid; + unsigned int liid; + int ret = 0; unsigned long flags; if (avail < sizeof(hdr)) { @@ -643,56 +646,78 @@ static int qcom_glink_rx_data(struct qcom_glink *glink, size_t avail) dev_dbg(glink->dev, "Data on non-existing channel\n"); /* Drop the message */ - qcom_glink_rx_advance(glink, - ALIGN(sizeof(hdr) + chunk_size, 8)); - return 0; + goto advance_rx; } - /* Might have an ongoing, fragmented, message to append */ - if (!channel->buf) { - channel->buf = kmalloc(chunk_size + left_size, GFP_ATOMIC); - if (!channel->buf) - return -ENOMEM; + if (glink->intentless) { + /* Might have an ongoing, fragmented, message to append */ + if (!channel->buf) { + intent = kzalloc(sizeof(*intent), GFP_ATOMIC); + if (!intent) + return -ENOMEM; + + intent->data = kmalloc(chunk_size + left_size, + GFP_ATOMIC); + if (!intent->data) { + kfree(intent); + return -ENOMEM; + } + + intent->id = 0xbabababa; + intent->size = chunk_size + left_size; + intent->offset = 0; + + channel->buf = intent; + } else { + intent = channel->buf; + } + } else { + liid = le32_to_cpu(hdr.msg.param2); - channel->buf_size = chunk_size + left_size; - channel->buf_offset = 0; - } + spin_lock_irqsave(&channel->intent_lock, flags); + intent = idr_find(&channel->liids, liid); + spin_unlock_irqrestore(&channel->intent_lock, flags); - qcom_glink_rx_advance(glink, sizeof(hdr)); + if (!intent) { + dev_err(glink->dev, + "no intent found for channel %s intent %d", + channel->name, liid); + goto advance_rx; + } + } - if (channel->buf_size - channel->buf_offset < chunk_size) { - dev_err(glink->dev, "Insufficient space in input buffer\n"); + if (intent->size - intent->offset < chunk_size) { + dev_err(glink->dev, "Insufficient space in intent\n"); /* The packet header lied, drop payload */ - qcom_glink_rx_advance(glink, chunk_size); - return -ENOMEM; + goto advance_rx; } - qcom_glink_rx_peak(glink, channel->buf + channel->buf_offset, + qcom_glink_rx_advance(glink, ALIGN(sizeof(hdr), 8)); + qcom_glink_rx_peak(glink, intent->data + intent->offset, chunk_size); - channel->buf_offset += chunk_size; + intent->offset += chunk_size; /* Handle message when no fragments remain to be received */ if (!left_size) { spin_lock(&channel->recv_lock); if (channel->ept.cb) { channel->ept.cb(channel->ept.rpdev, - channel->buf, - channel->buf_offset, + intent->data, + intent->offset, channel->ept.priv, RPMSG_ADDR_ANY); } spin_unlock(&channel->recv_lock); - kfree(channel->buf); + intent->offset = 0; channel->buf = NULL; - channel->buf_size = 0; } - /* Each message starts at 8 byte aligned address */ +advance_rx: qcom_glink_rx_advance(glink, ALIGN(chunk_size, 8)); - return 0; + return ret; } static int qcom_glink_rx_open_ack(struct qcom_glink *glink, unsigned int lcid)