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Thu, 24 Aug 2017 07:22:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1503559376; bh=PuvMumRdtm3XRUoznshilb+6Os7CnvMnx6Nofo03loo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TwxIt6T3G5AMQHwko4HUOVZykNL98KpbwRFgztfXMKdDTq8+YdTXlhkqeUo5P3bOq aWQ739T4Wh9iLSMtSgRRNw3zdPR3vAKKKQnpQoO0lhtDVZyinYUx4sgbe3usHsdGOX E78oaxNKZ9pCi9lef26ShfnWyT/KOZWV2w8zPogM= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 52A24607DC Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=sricharan@codeaurora.org From: Sricharan R To: ohad@wizery.com, bjorn.andersson@linaro.org, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 20/20] rpmsg: glink: Handle remote rx done command Date: Thu, 24 Aug 2017 12:51:42 +0530 Message-Id: <1503559302-3744-21-git-send-email-sricharan@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1503559302-3744-1-git-send-email-sricharan@codeaurora.org> References: <1503559302-3744-1-git-send-email-sricharan@codeaurora.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170824_002323_928691_1D07743E X-CRM114-Status: GOOD ( 11.51 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sricharan@codeaurora.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Once the remote side sends a rx done ack, check for the intent reuse information from it and suitably discard or reuse the remote passed intent buffers. Signed-off-by: Sricharan R Signed-off-by: Bjorn Andersson --- drivers/rpmsg/qcom_glink_native.c | 42 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c index 54ddb66..08953ca 100644 --- a/drivers/rpmsg/qcom_glink_native.c +++ b/drivers/rpmsg/qcom_glink_native.c @@ -657,6 +657,40 @@ static int qcom_glink_advertise_intent(struct qcom_glink *glink, return intent; } +static void qcom_glink_handle_rx_done(struct qcom_glink *glink, + u32 cid, uint32_t iid, + bool reuse) +{ + struct glink_core_rx_intent *intent; + struct glink_channel *channel; + unsigned long flags; + + spin_lock_irqsave(&glink->idr_lock, flags); + channel = idr_find(&glink->rcids, cid); + spin_unlock_irqrestore(&glink->idr_lock, flags); + if (!channel) { + dev_err(glink->dev, "invalid channel id received\n"); + return; + } + + spin_lock_irqsave(&channel->intent_lock, flags); + intent = idr_find(&channel->riids, iid); + + if (!intent) { + spin_unlock_irqrestore(&channel->intent_lock, flags); + dev_err(glink->dev, "invalid intent id received\n"); + return; + } + + intent->in_use = false; + + if (!reuse) { + idr_remove(&channel->riids, intent->id); + kfree(intent); + } + spin_unlock_irqrestore(&channel->intent_lock, flags); +} + /** * qcom_glink_handle_intent_req() - Receive a request for rx_intent * from remote side @@ -965,6 +999,14 @@ static irqreturn_t qcom_glink_native_intr(int irq, void *data) case RPM_CMD_INTENT: qcom_glink_handle_intent(glink, param1, param2, avail); break; + case RPM_CMD_RX_DONE: + qcom_glink_handle_rx_done(glink, param1, param2, false); + qcom_glink_rx_advance(glink, ALIGN(sizeof(msg), 8)); + break; + case RPM_CMD_RX_DONE_W_REUSE: + qcom_glink_handle_rx_done(glink, param1, param2, true); + qcom_glink_rx_advance(glink, ALIGN(sizeof(msg), 8)); + break; case RPM_CMD_RX_INTENT_REQ_ACK: qcom_glink_handle_intent_req_ack(glink, param1, param2); qcom_glink_rx_advance(glink, ALIGN(sizeof(msg), 8));