From patchwork Sat Nov 11 02:14:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna Chaitanya Chundru X-Patchwork-Id: 743126 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 869613C29; Sat, 11 Nov 2023 02:15:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="JXGpSIl2" Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 26A423C0C; Fri, 10 Nov 2023 18:15:50 -0800 (PST) Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3AB1ZKQD010029; Sat, 11 Nov 2023 02:15:43 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : date : subject : mime-version : content-type : content-transfer-encoding : message-id : to : cc; s=qcppdkim1; bh=V5vmmfFRfMOjr/pwgxiEu1F1p2ZqSvUhcEkulhxITVw=; b=JXGpSIl2tMk9q9bTytndU7MR2N+rlAvzWg+Vp4hPFqx764Oc/jDzGTlqDNuiNcJkGCm8 z7k++l93on0uVJHDasUXVgGiViMXFgrmhkBwmlqPi1jE3GeUiLoYp465O+Z2AieZPRWu TKfeGK4ZEGmZmCUZAAMzhNMHbX9MW7wS1dyvjIisN/ZKauVxRwhpxIY33iW+H/Qtoyl2 jSVmz34s4NV9afkz9+E4CZG26wlYmYf+Jg7FeMn688yC/F3w4nDjQVuZTrPZY1K6ks0m cQlgoiXS3o85vyDaU89ayYBmu02eVnTPYBRSr6i2dJckLsycg/8qHPAQ3dbp+gTumxVh bA== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3u93r0ktwx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 11 Nov 2023 02:15:42 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3AB2Fguv026520 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 11 Nov 2023 02:15:42 GMT Received: from hu-krichai-hyd.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.39; Fri, 10 Nov 2023 18:15:38 -0800 From: Krishna chaitanya chundru Date: Sat, 11 Nov 2023 07:44:41 +0530 Subject: [PATCH v3] bus: mhi: host: Add tracing support Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20231111-ftrace_support-v3-1-f358d2911a74@quicinc.com> X-B4-Tracking: v=1; b=H4sIAJLjTmUC/3XMQQ6CMBCF4auQrq3ptNBQV97DGFPLVGYhYAuNh nB3CyuNcfm/5H0zixgIIzsUMwuYKFLf5VC7grnWdjfk1ORmUkgFQlTcj8E6vMRpGPowcl1r05R QaVCG5dMQ0NNzA0/n3C3FsQ+vzU+wrn+pBBy4VFZ6ZUpvS3N8TOSoc3vX39mKJfkBgPoBZAY01 kY5FCCu1TewLMsb+fqVV+8AAAA= To: Manivannan Sadhasivam , Steven Rostedt , Masami Hiramatsu CC: , , , , , , , , , , "Krishna chaitanya chundru" X-Mailer: b4 0.13-dev-83828 X-Developer-Signature: v=1; a=ed25519-sha256; t=1699668938; l=12394; i=quic_krichai@quicinc.com; s=20230907; h=from:subject:message-id; bh=iEU0SaMPKeYKHiWHmaA9fg8H+hgn9YL8UTuW/DJ/+sk=; b=FRQW3+ag7IDa2m8qYhGSUJUNQUGsGM39lBV395JXK55jyEI9Y6F0YRTTnPiAfnrlndG+8TDE5 llSm3uONf8CB1g8u0HEZKsC0cANpVQHEiBlshNT0PFFewYLvZ5CUTx5 X-Developer-Key: i=quic_krichai@quicinc.com; a=ed25519; pk=10CL2pdAKFyzyOHbfSWHCD0X0my7CXxj8gJScmn1FAg= X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: ZqyOZdiV7oG5SOfRLpzaFBx8bvRfRnFP X-Proofpoint-ORIG-GUID: ZqyOZdiV7oG5SOfRLpzaFBx8bvRfRnFP X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-10_21,2023-11-09_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 clxscore=1011 impostorscore=0 mlxscore=0 suspectscore=0 malwarescore=0 bulkscore=0 mlxlogscore=999 adultscore=0 phishscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311110016 This change adds ftrace support for following functions which helps in debugging the issues when there is Channel state & MHI state change and also when we receive data and control events: 1. mhi_intvec_mhi_states 2. mhi_process_data_event_ring 3. mhi_process_ctrl_ev_ring 4. mhi_gen_tre 5. mhi_update_channel_state 6. mhi_tryset_pm_state 7. mhi_pm_st_worker Where ever we added trace events removing debug messages. Signed-off-by: Krishna chaitanya chundru --- Changes in v3: - move trace header file from include/trace/events to drivers/bus/mhi/host/ so that - we can include driver header files. - Use macros directly in the trace events as suggested Jeffrey Hugo. - Reorder the structure in the events as suggested by steve to avoid holes in the buffer. - removed the mhi_to_physical function as this can give security issues. - removed macros to define strings as we can get those from driver headers. - Link to v2: https://lore.kernel.org/r/20231013-ftrace_support-v2-1-6e893ce010b5@quicinc.com Changes in v2: - Passing the raw state into the trace event and using __print_symbolic() as suggested by bjorn. - Change mhi_pm_st_worker to mhi_pm_st_transition as suggested by bjorn. - Fixed the kernel test rebot issues. - Link to v1: https://lore.kernel.org/r/20231005-ftrace_support-v1-1-23a2f394fa49@quicinc.com --- drivers/bus/mhi/host/init.c | 3 + drivers/bus/mhi/host/internal.h | 1 + drivers/bus/mhi/host/main.c | 24 +++-- drivers/bus/mhi/host/pm.c | 6 +- drivers/bus/mhi/host/trace.h | 224 ++++++++++++++++++++++++++++++++++++++++ 5 files changed, 245 insertions(+), 13 deletions(-) --- base-commit: 3006adf3be79cde4d14b1800b963b82b6e5572e0 change-id: 20231005-ftrace_support-6869d4156139 Best regards, diff --git a/drivers/bus/mhi/host/init.c b/drivers/bus/mhi/host/init.c index f78aefd2d7a3..6acb85f4c5f8 100644 --- a/drivers/bus/mhi/host/init.c +++ b/drivers/bus/mhi/host/init.c @@ -20,6 +20,9 @@ #include #include "internal.h" +#define CREATE_TRACE_POINTS +#include "trace.h" + static DEFINE_IDA(mhi_controller_ida); const char * const mhi_ee_str[MHI_EE_MAX] = { diff --git a/drivers/bus/mhi/host/internal.h b/drivers/bus/mhi/host/internal.h index 2e139e76de4c..a02a71605907 100644 --- a/drivers/bus/mhi/host/internal.h +++ b/drivers/bus/mhi/host/internal.h @@ -7,6 +7,7 @@ #ifndef _MHI_INT_H #define _MHI_INT_H +#include "trace.h" #include "../common.h" extern struct bus_type mhi_bus_type; diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c index dcf627b36e82..7fe8b2dd9e24 100644 --- a/drivers/bus/mhi/host/main.c +++ b/drivers/bus/mhi/host/main.c @@ -491,11 +491,9 @@ irqreturn_t mhi_intvec_threaded_handler(int irq_number, void *priv) state = mhi_get_mhi_state(mhi_cntrl); ee = mhi_get_exec_env(mhi_cntrl); - dev_dbg(dev, "local ee: %s state: %s device ee: %s state: %s\n", - TO_MHI_EXEC_STR(mhi_cntrl->ee), - mhi_state_str(mhi_cntrl->dev_state), - TO_MHI_EXEC_STR(ee), mhi_state_str(state)); + trace_mhi_intvec_states(mhi_cntrl->mhi_dev->name, mhi_cntrl->ee, + mhi_cntrl->dev_state, ee, state); if (state == MHI_STATE_SYS_ERR) { dev_dbg(dev, "System error detected\n"); pm_state = mhi_tryset_pm_state(mhi_cntrl, @@ -832,6 +830,10 @@ int mhi_process_ctrl_ev_ring(struct mhi_controller *mhi_cntrl, while (dev_rp != local_rp) { enum mhi_pkt_type type = MHI_TRE_GET_EV_TYPE(local_rp); + trace_mhi_process_ctrl_ev_ring(mhi_cntrl->mhi_dev->name, (u64)local_rp, + local_rp->ptr, local_rp->dword[0], + local_rp->dword[1]); + switch (type) { case MHI_PKT_TYPE_BW_REQ_EVENT: { @@ -997,6 +999,9 @@ int mhi_process_data_event_ring(struct mhi_controller *mhi_cntrl, while (dev_rp != local_rp && event_quota > 0) { enum mhi_pkt_type type = MHI_TRE_GET_EV_TYPE(local_rp); + trace_mhi_process_data_event_ring(mhi_cntrl->mhi_dev->name, local_rp->ptr, + local_rp->dword[0], local_rp->dword[1]); + chan = MHI_TRE_GET_EV_CHID(local_rp); WARN_ON(chan >= mhi_cntrl->max_chan); @@ -1235,6 +1240,8 @@ int mhi_gen_tre(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan, mhi_tre->dword[0] = MHI_TRE_DATA_DWORD0(info->len); mhi_tre->dword[1] = MHI_TRE_DATA_DWORD1(bei, eot, eob, chain); + trace_mhi_gen_tre(mhi_cntrl->mhi_dev->name, mhi_chan->chan, (u64)mhi_tre, + mhi_tre->ptr, mhi_tre->dword[0], mhi_tre->dword[1]); /* increment WP */ mhi_add_ring_element(mhi_cntrl, tre_ring); mhi_add_ring_element(mhi_cntrl, buf_ring); @@ -1327,9 +1334,8 @@ static int mhi_update_channel_state(struct mhi_controller *mhi_cntrl, enum mhi_cmd_type cmd = MHI_CMD_NOP; int ret; - dev_dbg(dev, "%d: Updating channel state to: %s\n", mhi_chan->chan, - TO_CH_STATE_TYPE_STR(to_state)); - + trace_mhi_update_channel_state_start(mhi_cntrl->mhi_dev->name, mhi_chan->chan, + to_state); switch (to_state) { case MHI_CH_STATE_TYPE_RESET: write_lock_irq(&mhi_chan->lock); @@ -1396,9 +1402,7 @@ static int mhi_update_channel_state(struct mhi_controller *mhi_cntrl, write_unlock_irq(&mhi_chan->lock); } - dev_dbg(dev, "%d: Channel state change to %s successful\n", - mhi_chan->chan, TO_CH_STATE_TYPE_STR(to_state)); - + trace_mhi_update_channel_state_end(mhi_cntrl->mhi_dev->name, mhi_chan->chan, to_state); exit_channel_update: mhi_cntrl->runtime_put(mhi_cntrl); mhi_device_put(mhi_cntrl->mhi_dev); diff --git a/drivers/bus/mhi/host/pm.c b/drivers/bus/mhi/host/pm.c index 8a4362d75fc4..e32afdc92fde 100644 --- a/drivers/bus/mhi/host/pm.c +++ b/drivers/bus/mhi/host/pm.c @@ -123,6 +123,7 @@ enum mhi_pm_state __must_check mhi_tryset_pm_state(struct mhi_controller *mhi_cn if (unlikely(!(dev_state_transitions[index].to_states & state))) return cur_state; + trace_mhi_tryset_pm_state(mhi_cntrl->mhi_dev->name, state); mhi_cntrl->pm_state = state; return mhi_cntrl->pm_state; } @@ -753,7 +754,6 @@ void mhi_pm_st_worker(struct work_struct *work) struct mhi_controller *mhi_cntrl = container_of(work, struct mhi_controller, st_worker); - struct device *dev = &mhi_cntrl->mhi_dev->dev; spin_lock_irq(&mhi_cntrl->transition_lock); list_splice_tail_init(&mhi_cntrl->transition_list, &head); @@ -761,8 +761,8 @@ void mhi_pm_st_worker(struct work_struct *work) list_for_each_entry_safe(itr, tmp, &head, node) { list_del(&itr->node); - dev_dbg(dev, "Handling state transition: %s\n", - TO_DEV_STATE_TRANS_STR(itr->state)); + + trace_mhi_pm_st_transition(mhi_cntrl->mhi_dev->name, itr->state); switch (itr->state) { case DEV_ST_TRANSITION_PBL: diff --git a/drivers/bus/mhi/host/trace.h b/drivers/bus/mhi/host/trace.h new file mode 100644 index 000000000000..66d0d96db1d9 --- /dev/null +++ b/drivers/bus/mhi/host/trace.h @@ -0,0 +1,224 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM mhi_host + +#if !defined(_TRACE_EVENT_MHI_HOST_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_EVENT_MHI_HOST_H + +#include +#include +#include "../common.h" +#include "internal.h" + +TRACE_EVENT(mhi_gen_tre, + + TP_PROTO(const char *name, int ch_num, u64 wp, __le64 tre_ptr, + __le32 dword0, __le32 dword1), + + TP_ARGS(name, ch_num, wp, tre_ptr, dword0, dword1), + + TP_STRUCT__entry( + __string(name, name) + __field(int, ch_num) + __field(u64, wp) + __field(__le64, tre_ptr) + __field(__le32, dword0) + __field(__le32, dword1) + ), + + TP_fast_assign( + __assign_str(name, name); + __entry->ch_num = ch_num; + __entry->wp = wp; + __entry->tre_ptr = tre_ptr; + __entry->dword0 = dword0; + __entry->dword1 = dword1; + ), + + TP_printk("%s: Chan: %d WP: 0x%llx TRE: 0x%llx 0x%08x 0x%08x\n", + __get_str(name), __entry->ch_num, __entry->wp, __entry->tre_ptr, + __entry->dword0, __entry->dword1) +); + +TRACE_EVENT(mhi_intvec_states, + + TP_PROTO(const char *name, int local_ee, int state, int dev_ee, int dev_state), + + TP_ARGS(name, local_ee, state, dev_ee, dev_state), + + TP_STRUCT__entry( + __string(name, name) + __field(int, local_ee) + __field(int, state) + __field(int, dev_ee) + __field(int, dev_state) + ), + + TP_fast_assign( + __assign_str(name, name); + __entry->local_ee = local_ee; + __entry->state = state; + __entry->dev_ee = dev_ee; + __entry->dev_state = dev_state; + ), + + TP_printk("%s: local ee: %s state: %s device ee: %s state: %s\n", + __get_str(name), + TO_MHI_EXEC_STR(__entry->local_ee), + mhi_state_str(__entry->state), + TO_MHI_EXEC_STR(__entry->dev_ee), + mhi_state_str(__entry->dev_state)) +); + +TRACE_EVENT(mhi_tryset_pm_state, + + TP_PROTO(const char *name, int pm_state), + + TP_ARGS(name, pm_state), + + TP_STRUCT__entry( + __string(name, name) + __field(int, pm_state) + ), + + TP_fast_assign( + __assign_str(name, name); + if (pm_state) + pm_state = __fls(pm_state); + __entry->pm_state = pm_state; + ), + + TP_printk("%s: PM state: %s\n", __get_str(name), + to_mhi_pm_state_str(__entry->pm_state)) +); + +TRACE_EVENT(mhi_process_data_event_ring, + + TP_PROTO(const char *name, __le64 ptr, __le32 dword0, __le32 dword1), + + TP_ARGS(name, ptr, dword0, dword1), + + TP_STRUCT__entry( + __field(__le64, ptr) + __string(name, name) + __field(__le32, dword0) + __field(__le32, dword1) + ), + + TP_fast_assign( + __assign_str(name, name); + __entry->ptr = ptr; + __entry->dword0 = dword0; + __entry->dword1 = dword1; + ), + + TP_printk("%s: Processing Event:0x%llx 0x%08x 0x%08x\n", + __get_str(name), __entry->ptr, __entry->dword0, __entry->dword1) +); + +TRACE_EVENT(mhi_process_ctrl_ev_ring, + + TP_PROTO(const char *name, u64 rp, __le64 ptr, __le32 dword0, __le32 dword1), + + TP_ARGS(name, rp, ptr, dword0, dword1), + + TP_STRUCT__entry( + __field(u64, rp) + __field(__le64, ptr) + __string(name, name) + __field(__le32, dword0) + __field(__le32, dword1) + __field(int, state) + ), + + TP_fast_assign( + __assign_str(name, name); + __entry->rp = rp; + __entry->ptr = ptr; + __entry->dword0 = dword0; + __entry->dword1 = dword1; + __entry->state = MHI_TRE_GET_EV_STATE(rp); + ), + + TP_printk("%s: RP:0x%llx Processing Event:0x%llx 0x%08x 0x%08x state:%s\n", + __get_str(name), __entry->rp, __entry->ptr, __entry->dword0, + __entry->dword1, mhi_state_str(__entry->state)) +); + +TRACE_EVENT(mhi_update_channel_state_start, + + TP_PROTO(const char *name, int ch_num, int state), + + TP_ARGS(name, ch_num, state), + + TP_STRUCT__entry( + __string(name, name) + __field(int, ch_num) + __field(int, state) + ), + + TP_fast_assign( + __assign_str(name, name); + __entry->ch_num = ch_num; + __entry->state = state; + ), + + TP_printk("%s: ch%d: Updating state to: %s\n", + __get_str(name), __entry->ch_num, + TO_CH_STATE_TYPE_STR(__entry->state)) +); + +TRACE_EVENT(mhi_update_channel_state_end, + + TP_PROTO(const char *name, int ch_num, int state), + + TP_ARGS(name, ch_num, state), + + TP_STRUCT__entry( + __string(name, name) + __field(int, ch_num) + __field(int, state) + ), + + TP_fast_assign( + __assign_str(name, name); + __entry->ch_num = ch_num; + __entry->state = state; + ), + + TP_printk("%s: ch%d: Updated state to: %s\n", + __get_str(name), __entry->ch_num, + TO_CH_STATE_TYPE_STR(__entry->state)) +); + +TRACE_EVENT(mhi_pm_st_transition, + + TP_PROTO(const char *name, int state), + + TP_ARGS(name, state), + + TP_STRUCT__entry( + __string(name, name) + __field(int, state) + ), + + TP_fast_assign( + __assign_str(name, name); + __entry->state = state; + ), + + TP_printk("%s: Handling state transition: %s\n", __get_str(name), + TO_DEV_STATE_TRANS_STR(__entry->state)) +); + +#endif +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH . +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_FILE trace + +#include