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From: Lina Iyer <ilina@codeaurora.org>
To: andy.gross@linaro.org, david.brown@linaro.org,
	linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org
Cc: rnayak@codeaurora.org, bjorn.andersson@linaro.org,
	linux-kernel@vger.kernel.org, sboyd@kernel.org,
	evgreen@chromium.org, dianders@chromium.org,
	Lina Iyer <ilina@codeaurora.org>
Subject: [PATCH v7 06/10] drivers: qcom: rpmh-rsc: allow invalidation of sleep/wake TCS
Date: Wed,  2 May 2018 13:37:45 -0600	[thread overview]
Message-ID: <20180502193749.31004-7-ilina@codeaurora.org> (raw)
In-Reply-To: <20180502193749.31004-1-ilina@codeaurora.org>

Allow sleep and wake commands to be cleared from the respective TCSes,
so that they can be re-populated.

Signed-off-by: Lina Iyer <ilina@codeaurora.org>
---

Changes in v7:
	- Move bitmap_zero() outside the loop

Changes in v6:
	- remove unnecessary locks around __tcs_invalidate
	- rename function to tcs_invaldiate

Changes in v4:
	- refactored the rphm_rsc_invalidate()
---
 drivers/soc/qcom/rpmh-rsc.c | 45 +++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c
index 4e2144a14c31..42aedf2d80fe 100644
--- a/drivers/soc/qcom/rpmh-rsc.c
+++ b/drivers/soc/qcom/rpmh-rsc.c
@@ -104,6 +104,51 @@ static struct tcs_group *get_tcs_of_type(struct rsc_drv *drv, int type)
 	return &drv->tcs[type];
 }
 
+static int tcs_invalidate(struct rsc_drv *drv, int type)
+{
+	int m;
+	struct tcs_group *tcs;
+
+	tcs = get_tcs_of_type(drv, type);
+	if (IS_ERR(tcs))
+		return PTR_ERR(tcs);
+
+	spin_lock(&tcs->lock);
+	if (bitmap_empty(tcs->slots, MAX_TCS_SLOTS)) {
+		spin_unlock(&tcs->lock);
+		return 0;
+	}
+
+	for (m = tcs->offset; m < tcs->offset + tcs->num_tcs; m++) {
+		if (!tcs_is_free(drv, m)) {
+			spin_unlock(&tcs->lock);
+			return -EAGAIN;
+		}
+		write_tcs_reg_sync(drv, RSC_DRV_CMD_ENABLE, m, 0);
+	}
+	bitmap_zero(tcs->slots, MAX_TCS_SLOTS);
+	spin_unlock(&tcs->lock);
+
+	return 0;
+}
+
+/**
+ * rpmh_rsc_invalidate - Invalidate sleep and wake TCSes
+ *
+ * @drv: the RSC controller
+ */
+int rpmh_rsc_invalidate(struct rsc_drv *drv)
+{
+	int ret;
+
+	ret = tcs_invalidate(drv, SLEEP_TCS);
+	if (!ret)
+		ret = tcs_invalidate(drv, WAKE_TCS);
+
+	return ret;
+}
+EXPORT_SYMBOL(rpmh_rsc_invalidate);
+
 static struct tcs_group *get_tcs_for_msg(struct rsc_drv *drv,
 					 const struct tcs_request *msg)
 {
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

  parent reply	other threads:[~2018-05-02 19:39 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-02 19:37 [PATCH v7 00/10] drivers/qcom: add RPMH communication support Lina Iyer
2018-05-02 19:37 ` [PATCH v7 01/10] drivers: qcom: rpmh-rsc: add RPMH controller for QCOM SoCs Lina Iyer
2018-05-02 19:37 ` [PATCH v7 02/10] dt-bindings: introduce RPMH RSC bindings for Qualcomm SoCs Lina Iyer
2018-05-02 20:37   ` Stephen Boyd
2018-05-02 19:37 ` [PATCH v7 03/10] drivers: qcom: rpmh-rsc: log RPMH requests in FTRACE Lina Iyer
2018-05-02 19:45   ` Steven Rostedt
2018-05-02 19:37 ` [PATCH v7 04/10] drivers: qcom: rpmh: add RPMH helper functions Lina Iyer
2018-05-03 20:26   ` Doug Anderson
2018-05-04 20:50     ` Matthias Kaehlcke
2018-05-08 16:05     ` ilina
2018-05-10 22:37       ` Doug Anderson
2018-05-11 15:06         ` Lina Iyer
2018-05-11 20:14           ` Doug Anderson
2018-05-14 15:00             ` Lina Iyer
2018-05-02 19:37 ` [PATCH v7 05/10] drivers: qcom: rpmh-rsc: write sleep/wake requests to TCS Lina Iyer
2018-05-03 21:35   ` Matthias Kaehlcke
2018-05-08 16:16     ` ilina
2018-05-02 19:37 ` Lina Iyer [this message]
2018-05-03 22:06   ` [PATCH v7 06/10] drivers: qcom: rpmh-rsc: allow invalidation of sleep/wake TCS Matthias Kaehlcke
2018-05-08 16:14     ` ilina
2018-05-08 17:25       ` Matthias Kaehlcke
2018-05-02 19:37 ` [PATCH v7 07/10] drivers: qcom: rpmh: cache sleep/wake state requests Lina Iyer
2018-05-04 21:39   ` Matthias Kaehlcke
2018-05-02 19:37 ` [PATCH v7 08/10] drivers: qcom: rpmh: allow requests to be sent asynchronously Lina Iyer
2018-05-02 19:37 ` [PATCH v7 09/10] drivers: qcom: rpmh: add support for batch RPMH request Lina Iyer
2018-05-02 19:37 ` [PATCH v7 10/10] drivers: qcom: rpmh-rsc: allow active requests from wake TCS Lina Iyer

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