From: Cristian Marussi <cristian.marussi@arm.com> To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, virtualization@lists.linux-foundation.org, virtio-dev@lists.oasis-open.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, Jonathan.Cameron@Huawei.com, f.fainelli@gmail.com, etienne.carriere@linaro.org, vincent.guittot@linaro.org, souvik.chakravarty@arm.com, cristian.marussi@arm.com, igor.skalkin@opensynergy.com, peter.hilber@opensynergy.com, alex.bennee@linaro.org, jean-philippe@linaro.org, mikhail.golubev@opensynergy.com, anton.yakovlev@opensynergy.com, Vasyl.Vavrychuk@opensynergy.com, Andriy.Tryshnivskyy@opensynergy.com Subject: [PATCH v6 10/17] firmware: arm_scmi: Make polling mode optional Date: Mon, 12 Jul 2021 15:18:26 +0100 [thread overview] Message-ID: <20210712141833.6628-11-cristian.marussi@arm.com> (raw) In-Reply-To: <20210712141833.6628-1-cristian.marussi@arm.com> Add a check for the presence of .poll_done transport operation so that transports that do not need to support polling mode have no need to provide a dummy .poll_done callback either and polling mode can be disabled in the SCMI core for that tranport. Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> --- drivers/firmware/arm_scmi/driver.c | 43 ++++++++++++++++++------------ 1 file changed, 26 insertions(+), 17 deletions(-) diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index a952b6527b8a..4183d25c9289 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -777,25 +777,34 @@ static int do_xfer(const struct scmi_protocol_handle *ph, } if (xfer->hdr.poll_completion) { - ktime_t stop = ktime_add_ns(ktime_get(), SCMI_MAX_POLL_TO_NS); - - spin_until_cond(scmi_xfer_done_no_timeout(cinfo, xfer, stop)); - - if (ktime_before(ktime_get(), stop)) { - unsigned long flags; - - /* - * Do not fetch_response if an out-of-order delayed - * response is being processed. - */ - spin_lock_irqsave(&xfer->lock, flags); - if (xfer->state == SCMI_XFER_SENT_OK) { - info->desc->ops->fetch_response(cinfo, xfer); - xfer->state = SCMI_XFER_RESP_OK; + if (info->desc->ops->poll_done) { + ktime_t stop = ktime_add_ns(ktime_get(), + SCMI_MAX_POLL_TO_NS); + + spin_until_cond(scmi_xfer_done_no_timeout(cinfo, xfer, + stop)); + + if (ktime_before(ktime_get(), stop)) { + unsigned long flags; + + /* + * Do not fetch_response if an out-of-order delayed + * response is being processed. + */ + spin_lock_irqsave(&xfer->lock, flags); + if (xfer->state == SCMI_XFER_SENT_OK) { + info->desc->ops->fetch_response(cinfo, + xfer); + xfer->state = SCMI_XFER_RESP_OK; + } + spin_unlock_irqrestore(&xfer->lock, flags); + } else { + ret = -ETIMEDOUT; } - spin_unlock_irqrestore(&xfer->lock, flags); } else { - ret = -ETIMEDOUT; + dev_warn_once(dev, + "Polling mode is not supported by transport.\n"); + ret = EINVAL; } } else { /* And we wait for the response. */ -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Cristian Marussi <cristian.marussi@arm.com> To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, virtualization@lists.linux-foundation.org, virtio-dev@lists.oasis-open.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, Jonathan.Cameron@Huawei.com, f.fainelli@gmail.com, etienne.carriere@linaro.org, vincent.guittot@linaro.org, souvik.chakravarty@arm.com, cristian.marussi@arm.com, igor.skalkin@opensynergy.com, peter.hilber@opensynergy.com, alex.bennee@linaro.org, jean-philippe@linaro.org, mikhail.golubev@opensynergy.com, anton.yakovlev@opensynergy.com, Vasyl.Vavrychuk@opensynergy.com, Andriy.Tryshnivskyy@opensynergy.com Subject: [PATCH v6 10/17] firmware: arm_scmi: Make polling mode optional Date: Mon, 12 Jul 2021 15:18:26 +0100 [thread overview] Message-ID: <20210712141833.6628-11-cristian.marussi@arm.com> (raw) In-Reply-To: <20210712141833.6628-1-cristian.marussi@arm.com> Add a check for the presence of .poll_done transport operation so that transports that do not need to support polling mode have no need to provide a dummy .poll_done callback either and polling mode can be disabled in the SCMI core for that tranport. Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> --- drivers/firmware/arm_scmi/driver.c | 43 ++++++++++++++++++------------ 1 file changed, 26 insertions(+), 17 deletions(-) diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index a952b6527b8a..4183d25c9289 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -777,25 +777,34 @@ static int do_xfer(const struct scmi_protocol_handle *ph, } if (xfer->hdr.poll_completion) { - ktime_t stop = ktime_add_ns(ktime_get(), SCMI_MAX_POLL_TO_NS); - - spin_until_cond(scmi_xfer_done_no_timeout(cinfo, xfer, stop)); - - if (ktime_before(ktime_get(), stop)) { - unsigned long flags; - - /* - * Do not fetch_response if an out-of-order delayed - * response is being processed. - */ - spin_lock_irqsave(&xfer->lock, flags); - if (xfer->state == SCMI_XFER_SENT_OK) { - info->desc->ops->fetch_response(cinfo, xfer); - xfer->state = SCMI_XFER_RESP_OK; + if (info->desc->ops->poll_done) { + ktime_t stop = ktime_add_ns(ktime_get(), + SCMI_MAX_POLL_TO_NS); + + spin_until_cond(scmi_xfer_done_no_timeout(cinfo, xfer, + stop)); + + if (ktime_before(ktime_get(), stop)) { + unsigned long flags; + + /* + * Do not fetch_response if an out-of-order delayed + * response is being processed. + */ + spin_lock_irqsave(&xfer->lock, flags); + if (xfer->state == SCMI_XFER_SENT_OK) { + info->desc->ops->fetch_response(cinfo, + xfer); + xfer->state = SCMI_XFER_RESP_OK; + } + spin_unlock_irqrestore(&xfer->lock, flags); + } else { + ret = -ETIMEDOUT; } - spin_unlock_irqrestore(&xfer->lock, flags); } else { - ret = -ETIMEDOUT; + dev_warn_once(dev, + "Polling mode is not supported by transport.\n"); + ret = EINVAL; } } else { /* And we wait for the response. */ -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-07-12 14:19 UTC|newest] Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-07-12 14:18 [PATCH v6 00/17] Introduce SCMI transport based on VirtIO Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 01/17] firmware: arm_scmi: Avoid padding in sensor message structure Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 02/17] firmware: arm_scmi: Fix max pending messages boundary check Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-14 16:46 ` Sudeep Holla 2021-07-14 16:46 ` Sudeep Holla 2021-07-12 14:18 ` [PATCH v6 03/17] firmware: arm_scmi: Add support for type handling in common functions Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 04/17] firmware: arm_scmi: Remove scmi_dump_header_dbg() helper Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 05/17] firmware: arm_scmi: Add transport optional init/exit support Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-28 11:40 ` Sudeep Holla 2021-07-28 11:40 ` Sudeep Holla 2021-07-28 12:28 ` Cristian Marussi 2021-07-28 12:28 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 06/17] firmware: arm_scmi: Introduce monotonically increasing tokens Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-28 14:17 ` Sudeep Holla 2021-07-28 14:17 ` Sudeep Holla 2021-07-28 16:54 ` Cristian Marussi 2021-07-28 16:54 ` [virtio-dev] " Cristian Marussi 2021-07-28 16:54 ` Cristian Marussi 2021-08-02 10:24 ` Sudeep Holla 2021-08-02 10:24 ` Sudeep Holla 2021-08-03 12:52 ` Cristian Marussi 2021-08-03 12:52 ` [virtio-dev] " Cristian Marussi 2021-08-03 12:52 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 07/17] firmware: arm_scmi: Handle concurrent and out-of-order messages Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-15 16:36 ` Peter Hilber 2021-07-15 16:36 ` [virtio-dev] " Peter Hilber 2021-07-15 16:36 ` Peter Hilber 2021-07-19 9:14 ` Cristian Marussi 2021-07-19 9:14 ` Cristian Marussi 2021-07-22 8:32 ` Peter Hilber 2021-07-22 8:32 ` [virtio-dev] " Peter Hilber 2021-07-22 8:32 ` Peter Hilber 2021-07-28 8:31 ` Cristian Marussi 2021-07-28 8:31 ` Cristian Marussi 2021-08-02 10:10 ` Sudeep Holla 2021-08-02 10:10 ` Sudeep Holla 2021-08-02 10:27 ` Cristian Marussi 2021-08-02 10:27 ` [virtio-dev] " Cristian Marussi 2021-08-02 10:27 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 08/17] firmware: arm_scmi: Add priv parameter to scmi_rx_callback Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-28 14:26 ` Sudeep Holla 2021-07-28 14:26 ` Sudeep Holla 2021-07-28 17:25 ` Cristian Marussi 2021-07-28 17:25 ` [virtio-dev] " Cristian Marussi 2021-07-28 17:25 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 09/17] firmware: arm_scmi: Make .clear_channel optional Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi [this message] 2021-07-12 14:18 ` [PATCH v6 10/17] firmware: arm_scmi: Make polling mode optional Cristian Marussi 2021-07-15 16:36 ` Peter Hilber 2021-07-15 16:36 ` [virtio-dev] " Peter Hilber 2021-07-15 16:36 ` Peter Hilber 2021-07-19 9:15 ` Cristian Marussi 2021-07-19 9:15 ` Cristian Marussi 2021-07-28 14:34 ` Sudeep Holla 2021-07-28 14:34 ` Sudeep Holla 2021-07-28 17:41 ` Cristian Marussi 2021-07-28 17:41 ` [virtio-dev] " Cristian Marussi 2021-07-28 17:41 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 11/17] firmware: arm_scmi: Make SCMI transports configurable Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-28 14:50 ` Sudeep Holla 2021-07-28 14:50 ` Sudeep Holla 2021-07-29 16:18 ` Cristian Marussi 2021-07-29 16:18 ` [virtio-dev] " Cristian Marussi 2021-07-29 16:18 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 12/17] firmware: arm_scmi: Make shmem support optional for transports Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 13/17] firmware: arm_scmi: Add method to override max message number Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 14/17] firmware: arm_scmi: Add message passing abstractions for transports Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-15 16:36 ` Peter Hilber 2021-07-15 16:36 ` [virtio-dev] " Peter Hilber 2021-07-15 16:36 ` Peter Hilber 2021-07-19 9:16 ` Cristian Marussi 2021-07-19 9:16 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 15/17] firmware: arm_scmi: Add optional link_supplier() transport op Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-28 15:36 ` Sudeep Holla 2021-07-28 15:36 ` Sudeep Holla 2021-07-29 16:19 ` Cristian Marussi 2021-07-29 16:19 ` [virtio-dev] " Cristian Marussi 2021-07-29 16:19 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 16/17] dt-bindings: arm: Add virtio transport for SCMI Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-12 14:18 ` [PATCH v6 17/17] firmware: arm_scmi: Add virtio transport Cristian Marussi 2021-07-12 14:18 ` Cristian Marussi 2021-07-15 16:35 ` [PATCH v6 00/17] Introduce SCMI transport based on VirtIO Peter Hilber 2021-07-15 16:35 ` [virtio-dev] " Peter Hilber 2021-07-15 16:35 ` Peter Hilber 2021-07-19 11:36 ` Cristian Marussi 2021-07-19 11:36 ` Cristian Marussi 2021-07-22 8:30 ` Peter Hilber 2021-07-22 8:30 ` [virtio-dev] " Peter Hilber 2021-07-22 8:30 ` Peter Hilber 2021-08-11 9:31 ` Floris Westermann 2021-08-11 9:31 ` Floris Westermann 2021-08-11 15:26 ` Cristian Marussi 2021-08-11 15:26 ` [virtio-dev] " Cristian Marussi 2021-08-11 15:26 ` Cristian Marussi
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