From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1032510AbeEXKr3 (ORCPT ); Thu, 24 May 2018 06:47:29 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:41894 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1032484AbeEXKrO (ORCPT ); Thu, 24 May 2018 06:47:14 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org B8C2F60C55 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=rplsssn@codeaurora.org From: Raju P L S S S N 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, mka@chromium.org, rplsssn@codeaurora.org, ilina@codeaurora.org Subject: [PATCH v9 06/10] drivers: qcom: rpmh-rsc: allow invalidation of sleep/wake TCS Date: Thu, 24 May 2018 16:15:27 +0530 Message-Id: <1527158731-17685-7-git-send-email-rplsssn@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1527158731-17685-1-git-send-email-rplsssn@codeaurora.org> References: <1527158731-17685-1-git-send-email-rplsssn@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lina Iyer Allow sleep and wake commands to be cleared from the respective TCSes, so that they can be re-populated. Signed-off-by: Lina Iyer Signed-off-by: Raju P.L.S.S.S.N Reviewed-by: Douglas Anderson --- Changes in v9: - Remove EXPORT_SYMBOL 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 | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c index e313ff4..4ab7001 100644 --- a/drivers/soc/qcom/rpmh-rsc.c +++ b/drivers/soc/qcom/rpmh-rsc.c @@ -104,6 +104,50 @@ 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; +} + 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,\na Linux Foundation Collaborative Project