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Message-ID: <20200727204521.GB229995@builder.lan>
Date: Mon, 27 Jul 2020 13:45:21 -0700
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: ????????? <wenhu.wang@...o.com>
Cc: elder@...nel.org, davem@...emloft.net, kuba@...nel.org,
kvalo@...eaurora.org, agross@...nel.org, ohad@...ery.com,
linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
linux-remoteproc@...r.kernel.org, alsa-devel@...a-project.org,
ath11k@...ts.infradead.org, netdev@...r.kernel.org,
ath10k@...ts.infradead.org, linux-wireless@...r.kernel.org,
srinivas.kandagatla@...aro.org, sibis@...eaurora.org
Subject: Re: [PATCH] soc: qmi: allow user to set handle wq to hiprio
On Mon 27 Jul 08:03 PDT 2020, ????????? wrote:
> Currently the qmi_handle is initialized single threaded and strictly
> ordered with the active set to 1. This is pretty simple and safe but
> sometimes ineffency. So it is better to allow user to decide whether
> a high priority workqueue should be used.
Can you please describe a scenario where this is needed/desired and
perhaps also comment on why this is not always desired?
Regards,
Bjorn
>
> Signed-off-by: Wang Wenhu <wenhu.wang@...o.com>
> ---
> drivers/net/ipa/ipa_qmi.c | 4 ++--
> drivers/net/wireless/ath/ath10k/qmi.c | 2 +-
> drivers/net/wireless/ath/ath11k/qmi.c | 2 +-
> drivers/remoteproc/qcom_sysmon.c | 2 +-
> drivers/slimbus/qcom-ngd-ctrl.c | 4 ++--
> drivers/soc/qcom/pdr_interface.c | 4 ++--
> drivers/soc/qcom/qmi_interface.c | 9 +++++++--
> include/linux/soc/qcom/qmi.h | 3 ++-
> samples/qmi/qmi_sample_client.c | 4 ++--
> 9 files changed, 20 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/net/ipa/ipa_qmi.c b/drivers/net/ipa/ipa_qmi.c
> index 5090f0f923ad..d78b0fe6bd83 100644
> --- a/drivers/net/ipa/ipa_qmi.c
> +++ b/drivers/net/ipa/ipa_qmi.c
> @@ -486,7 +486,7 @@ int ipa_qmi_setup(struct ipa *ipa)
> */
> ret = qmi_handle_init(&ipa_qmi->server_handle,
> IPA_QMI_SERVER_MAX_RCV_SZ, &ipa_server_ops,
> - ipa_server_msg_handlers);
> + ipa_server_msg_handlers, 0);
> if (ret)
> return ret;
>
> @@ -500,7 +500,7 @@ int ipa_qmi_setup(struct ipa *ipa)
> */
> ret = qmi_handle_init(&ipa_qmi->client_handle,
> IPA_QMI_CLIENT_MAX_RCV_SZ, &ipa_client_ops,
> - ipa_client_msg_handlers);
> + ipa_client_msg_handlers, 0);
> if (ret)
> goto err_server_handle_release;
>
> diff --git a/drivers/net/wireless/ath/ath10k/qmi.c b/drivers/net/wireless/ath/ath10k/qmi.c
> index 5468a41e928e..02881882b4d9 100644
> --- a/drivers/net/wireless/ath/ath10k/qmi.c
> +++ b/drivers/net/wireless/ath/ath10k/qmi.c
> @@ -1034,7 +1034,7 @@ int ath10k_qmi_init(struct ath10k *ar, u32 msa_size)
>
> ret = qmi_handle_init(&qmi->qmi_hdl,
> WLFW_BDF_DOWNLOAD_REQ_MSG_V01_MAX_MSG_LEN,
> - &ath10k_qmi_ops, qmi_msg_handler);
> + &ath10k_qmi_ops, qmi_msg_handler, 0);
> if (ret)
> goto err;
>
> diff --git a/drivers/net/wireless/ath/ath11k/qmi.c b/drivers/net/wireless/ath/ath11k/qmi.c
> index c00a99ad8dbc..91394d58d36e 100644
> --- a/drivers/net/wireless/ath/ath11k/qmi.c
> +++ b/drivers/net/wireless/ath/ath11k/qmi.c
> @@ -2397,7 +2397,7 @@ int ath11k_qmi_init_service(struct ath11k_base *ab)
>
> ab->qmi.target_mem_mode = ATH11K_QMI_TARGET_MEM_MODE_DEFAULT;
> ret = qmi_handle_init(&ab->qmi.handle, ATH11K_QMI_RESP_LEN_MAX,
> - &ath11k_qmi_ops, ath11k_qmi_msg_handlers);
> + &ath11k_qmi_ops, ath11k_qmi_msg_handlers, 0);
> if (ret < 0) {
> ath11k_warn(ab, "failed to initialize qmi handle\n");
> return ret;
> diff --git a/drivers/remoteproc/qcom_sysmon.c b/drivers/remoteproc/qcom_sysmon.c
> index 8d8996d714f0..4ec470e424ef 100644
> --- a/drivers/remoteproc/qcom_sysmon.c
> +++ b/drivers/remoteproc/qcom_sysmon.c
> @@ -614,7 +614,7 @@ struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc,
> }
>
> ret = qmi_handle_init(&sysmon->qmi, SSCTL_MAX_MSG_LEN, &ssctl_ops,
> - qmi_indication_handler);
> + qmi_indication_handler, 0);
> if (ret < 0) {
> dev_err(sysmon->dev, "failed to initialize qmi handle\n");
> kfree(sysmon);
> diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c
> index 743ee7b4e63f..ba76691fc5a5 100644
> --- a/drivers/slimbus/qcom-ngd-ctrl.c
> +++ b/drivers/slimbus/qcom-ngd-ctrl.c
> @@ -446,7 +446,7 @@ static int qcom_slim_qmi_init(struct qcom_slim_ngd_ctrl *ctrl,
> return -ENOMEM;
>
> rc = qmi_handle_init(handle, SLIMBUS_QMI_POWER_REQ_MAX_MSG_LEN,
> - NULL, qcom_slim_qmi_msg_handlers);
> + NULL, qcom_slim_qmi_msg_handlers, 0);
> if (rc < 0) {
> dev_err(ctrl->dev, "QMI client init failed: %d\n", rc);
> goto qmi_handle_init_failed;
> @@ -1293,7 +1293,7 @@ static int qcom_slim_ngd_qmi_svc_event_init(struct qcom_slim_ngd_ctrl *ctrl)
> int ret;
>
> ret = qmi_handle_init(&qmi->svc_event_hdl, 0,
> - &qcom_slim_ngd_qmi_svc_event_ops, NULL);
> + &qcom_slim_ngd_qmi_svc_event_ops, NULL, 0);
> if (ret < 0) {
> dev_err(ctrl->dev, "qmi_handle_init failed: %d\n", ret);
> return ret;
> diff --git a/drivers/soc/qcom/pdr_interface.c b/drivers/soc/qcom/pdr_interface.c
> index bdcf16f88a97..cc1cb90c1968 100644
> --- a/drivers/soc/qcom/pdr_interface.c
> +++ b/drivers/soc/qcom/pdr_interface.c
> @@ -685,7 +685,7 @@ struct pdr_handle *pdr_handle_alloc(void (*status)(int state,
>
> ret = qmi_handle_init(&pdr->locator_hdl,
> SERVREG_GET_DOMAIN_LIST_RESP_MAX_LEN,
> - &pdr_locator_ops, NULL);
> + &pdr_locator_ops, NULL, 0);
> if (ret < 0)
> goto destroy_indack;
>
> @@ -696,7 +696,7 @@ struct pdr_handle *pdr_handle_alloc(void (*status)(int state,
> ret = qmi_handle_init(&pdr->notifier_hdl,
> SERVREG_STATE_UPDATED_IND_MAX_LEN,
> &pdr_notifier_ops,
> - qmi_indication_handler);
> + qmi_indication_handler, 0);
> if (ret < 0)
> goto release_qmi_handle;
>
> diff --git a/drivers/soc/qcom/qmi_interface.c b/drivers/soc/qcom/qmi_interface.c
> index 1a03eaa38c46..01160dbfc4d0 100644
> --- a/drivers/soc/qcom/qmi_interface.c
> +++ b/drivers/soc/qcom/qmi_interface.c
> @@ -609,6 +609,7 @@ static struct socket *qmi_sock_create(struct qmi_handle *qmi,
> * @recv_buf_size: maximum size of incoming message
> * @ops: reference to callbacks for QRTR notifications
> * @handlers: NULL-terminated list of QMI message handlers
> + * @hiprio: whether high priority worker is used for workqueue
> *
> * This initializes the QMI client handle to allow sending and receiving QMI
> * messages. As messages are received the appropriate handler will be invoked.
> @@ -617,9 +618,11 @@ static struct socket *qmi_sock_create(struct qmi_handle *qmi,
> */
> int qmi_handle_init(struct qmi_handle *qmi, size_t recv_buf_size,
> const struct qmi_ops *ops,
> - const struct qmi_msg_handler *handlers)
> + const struct qmi_msg_handler *handlers,
> + unsigned int hiprio)
> {
> int ret;
> + unsigned int flags = WQ_UNBOUND;
>
> mutex_init(&qmi->txn_lock);
> mutex_init(&qmi->sock_lock);
> @@ -647,7 +650,9 @@ int qmi_handle_init(struct qmi_handle *qmi, size_t recv_buf_size,
> if (!qmi->recv_buf)
> return -ENOMEM;
>
> - qmi->wq = alloc_workqueue("qmi_msg_handler", WQ_UNBOUND, 1);
> + if (hiprio)
> + flags |= WQ_HIGHPRI;
> + qmi->wq = alloc_workqueue("qmi_msg_handler", flags, 1);
> if (!qmi->wq) {
> ret = -ENOMEM;
> goto err_free_recv_buf;
> diff --git a/include/linux/soc/qcom/qmi.h b/include/linux/soc/qcom/qmi.h
> index e712f94b89fc..24062fd7163d 100644
> --- a/include/linux/soc/qcom/qmi.h
> +++ b/include/linux/soc/qcom/qmi.h
> @@ -244,7 +244,8 @@ int qmi_add_server(struct qmi_handle *qmi, unsigned int service,
>
> int qmi_handle_init(struct qmi_handle *qmi, size_t max_msg_len,
> const struct qmi_ops *ops,
> - const struct qmi_msg_handler *handlers);
> + const struct qmi_msg_handler *handlers,
> + unsigned int hiprio);
> void qmi_handle_release(struct qmi_handle *qmi);
>
> ssize_t qmi_send_request(struct qmi_handle *qmi, struct sockaddr_qrtr *sq,
> diff --git a/samples/qmi/qmi_sample_client.c b/samples/qmi/qmi_sample_client.c
> index c9e7276c3d83..a91d1633ea38 100644
> --- a/samples/qmi/qmi_sample_client.c
> +++ b/samples/qmi/qmi_sample_client.c
> @@ -463,7 +463,7 @@ static int qmi_sample_probe(struct platform_device *pdev)
>
> ret = qmi_handle_init(&sample->qmi, TEST_DATA_REQ_MAX_MSG_LEN_V01,
> NULL,
> - qmi_sample_handlers);
> + qmi_sample_handlers, 0);
> if (ret < 0)
> return ret;
>
> @@ -590,7 +590,7 @@ static int qmi_sample_init(void)
> if (ret)
> goto err_remove_debug_dir;
>
> - ret = qmi_handle_init(&lookup_client, 0, &lookup_ops, NULL);
> + ret = qmi_handle_init(&lookup_client, 0, &lookup_ops, NULL, 0);
> if (ret < 0)
> goto err_unregister_driver;
>
> --
> 2.17.1
>
>
>
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