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Commit 8cb5e6bd authored by Arun Kumar Neelakantam's avatar Arun Kumar Neelakantam Committed by Matt Wagantall
Browse files

soc: qcom: glink_pkt: Add auto-intent queuing support 



Glink_pkt driver clients have to call the new IOCTL to queue an intent
to receive the data from remote side.

To ensure compatibility with smd_pkt clients add auto-intent queuing
in the read() call when glink_pkt client fails to queue an intent.

Change-Id: Iee8fca114f47921788c19d40247a768038985daa
Signed-off-by: default avatarArun Kumar Neelakantam <aneela@codeaurora.org>
parent a77c58e8

drivers/soc/qcom/glink.c

+32 −0
Original line number Diff line number Diff line
@@ -2356,6 +2356,38 @@ int glink_queue_rx_intent(void *handle, const void *pkt_priv, size_t size) 
}

EXPORT_SYMBOL(glink_queue_rx_intent);



/**

 * glink_rx_intent_exists() - Check if an intent exists.

 *

 * @handle:	handle returned by glink_open()

 * @size:	size of an intent to check or 0 for any intent

 *

 * Return:	TRUE if an intent exists with greater than or equal to the size

 *		else FALSE

 */

bool glink_rx_intent_exists(void *handle, size_t size)

{

	struct channel_ctx *ctx = (struct channel_ctx *)handle;

	struct glink_core_rx_intent *intent;

	unsigned long flags;



	if (!ctx || !ch_is_fully_opened(ctx))

		return false;



	spin_lock_irqsave(&ctx->local_rx_intent_lst_lock_lhc1, flags);

	list_for_each_entry(intent, &ctx->local_rx_intent_list, list) {

		if (size <= intent->intent_size) {

			spin_unlock_irqrestore(

				&ctx->local_rx_intent_lst_lock_lhc1, flags);

			return true;

		}

	}

	spin_unlock_irqrestore(&ctx->local_rx_intent_lst_lock_lhc1, flags);



	return false;

}

EXPORT_SYMBOL(glink_rx_intent_exists);



/**

 * glink_rx_done() - Return receive buffer to remote side.

 *

drivers/soc/qcom/msm_glink_pkt.c

+9 −0
Original line number Diff line number Diff line
@@ -494,6 +494,15 @@ ssize_t glink_pkt_read(struct file *file, 
		return -ENETRESET;

	}



	if (!glink_rx_intent_exists(devp->handle, count)) {

		ret  = glink_queue_rx_intent(devp->handle, devp, count);

		if (ret) {

			GLINK_PKT_ERR("%s: failed to queue_rx_intent ret[%d]\n",

					__func__, ret);

			return ret;

		}

	}



	GLINK_PKT_INFO("Begin %s on glink_pkt_dev id:%d buffer_size %zu\n",

		__func__, devp->i, count);

include/soc/qcom/glink.h

+16 −0
Original line number Diff line number Diff line
@@ -184,6 +184,17 @@ int glink_tx(void *handle, void *pkt_priv, void *data, size_t size, 
 */

int glink_queue_rx_intent(void *handle, const void *pkt_priv, size_t size);



/**

 * glink_rx_intent_exists() - Check if an intent of size exists.

 *

 * @handle:	handle returned by glink_open()

 * @size:	size of an intent to check or 0 for any intent

 *

 * Return:	TRUE if an intent exists with greater than or equal to the size

 *		else FALSE

 */

bool glink_rx_intent_exists(void *handle, size_t size);



/**

 * glink_rx_done() - Return receive buffer to remote side.

 *
@@ -296,6 +307,11 @@ static inline int glink_queue_rx_intent(void *handle, const void *pkt_priv, 
	return -ENODEV;

}



static inline bool glink_rx_intent_exists(void *handle, size_t size)

{

	return -ENODEV;

}



static inline int glink_rx_done(void *handle, const void *ptr, bool reuse)

{

	return -ENODEV;