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Add a new property "filter-source" to label a phandle to the coresight trace source device matching the hard coded filtering for the port. Signed-off-by: Tao Zhang Acked-by: Krzysztof Kozlowski --- .../arm/arm,coresight-static-replicator.yaml | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/arm/arm,coresight-static-rep= licator.yaml b/Documentation/devicetree/bindings/arm/arm,coresight-static-r= eplicator.yaml index 1892a091ac35..a6f793ea03b6 100644 --- a/Documentation/devicetree/bindings/arm/arm,coresight-static-replicator= .yaml +++ b/Documentation/devicetree/bindings/arm/arm,coresight-static-replicator= .yaml @@ -45,7 +45,22 @@ properties: patternProperties: '^port@[01]$': description: Output connections to CoreSight Trace bus - $ref: /schemas/graph.yaml#/properties/port + $ref: /schemas/graph.yaml#/$defs/port-base + unevaluatedProperties: false + + properties: + endpoint: + $ref: /schemas/graph.yaml#/$defs/endpoint-base + unevaluatedProperties: false + + properties: + filter-source: + $ref: /schemas/types.yaml#/definitions/phandle + description: + phandle to the coresight trace source device matching the + hard coded filtering for this port + + remote-endpoint: true =20 required: - compatible @@ -72,6 +87,7 @@ examples: reg =3D <0>; replicator_out_port0: endpoint { remote-endpoint =3D <&etb_in_port>; + filter-source =3D <&tpdm_video>; }; }; =20 @@ -79,6 +95,7 @@ examples: reg =3D <1>; replicator_out_port1: endpoint { remote-endpoint =3D <&tpiu_in_port>; + filter-source =3D <&tpdm_mdss>; }; }; }; --=20 2.17.1 From nobody Mon Nov 25 02:49:09 2024 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 3BD9A1E201C; Wed, 30 Oct 2024 09:33:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730280824; cv=none; b=dA70jQTBG3SwqTHOH9cX8zMkieykk8I4buyrZ5BlJgtY79OmwqWd0tpJIahQ5tQv3SpkWM8VRUiDov5Z9/CSlf8Pu06Z0luvnzS9k/Yy/mjTiYpao+NZ7Sfcf7o1RotdRpNJO2KIcoSJVwjdEqcdetIhBwZ2+P2abr5Sv3EowyU= ARC-Message-Signature: i=1; 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charset="utf-8" Since there are a lot of places in the code to check whether the device is source, add a helper to check it. Signed-off-by: Tao Zhang --- drivers/hwtracing/coresight/coresight-tpda.c | 2 +- include/linux/coresight.h | 7 ++++++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtraci= ng/coresight/coresight-tpda.c index bfca103f9f84..ad023a2a99d1 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.c +++ b/drivers/hwtracing/coresight/coresight-tpda.c @@ -24,7 +24,7 @@ DEFINE_CORESIGHT_DEVLIST(tpda_devs, "tpda"); =20 static bool coresight_device_is_tpdm(struct coresight_device *csdev) { - return (csdev->type =3D=3D CORESIGHT_DEV_TYPE_SOURCE) && + return (coresight_is_device_source(csdev)) && (csdev->subtype.source_subtype =3D=3D CORESIGHT_DEV_SUBTYPE_SOURCE_TPDM); } diff --git a/include/linux/coresight.h b/include/linux/coresight.h index c13342594278..9311df8538fc 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -588,9 +588,14 @@ static inline void csdev_access_write64(struct csdev_a= ccess *csa, u64 val, u32 o } #endif /* CONFIG_64BIT */ =20 +static inline bool coresight_is_device_source(struct coresight_device *csd= ev) +{ + return csdev && (csdev->type =3D=3D CORESIGHT_DEV_TYPE_SOURCE); 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charset="utf-8" Some replicators have hard coded filtering of "trace" data, based on the source device. This is different from the trace filtering based on TraceID, available in the standard programmable replicators. e.g., Qualcomm replicators have filtering based on custom trace protocol format and is not programmable. The source device could be connected to the replicator via intermediate components (e.g., a funnel). Thus we need platform information from the firmware tables to decide the source device corresponding to a given output port from the replicator. Given this affects "trace path building" and traversing the path back from the sink to source, add the concept of "filtering by source" to the generic coresight connection. The specified source will be marked like below in the Devicetree. test-replicator { ... ... ... ... out-ports { ... ... ... ... port@0 { reg =3D <0>; xyz: endpoint { remote-endpoint =3D <&zyx>; filter-source =3D <&source_1>; <-- To specify the source to }; be filtered out here. }; port@1 { reg =3D <1>; abc: endpoint { remote-endpoint =3D <&cba>; filter-source =3D <&source_2>; <-- To specify the source to }; be filtered out here. }; }; }; Signed-off-by: Tao Zhang --- drivers/hwtracing/coresight/coresight-core.c | 113 +++++++++++++++--- .../hwtracing/coresight/coresight-platform.c | 18 +++ include/linux/coresight.h | 5 + 3 files changed, 117 insertions(+), 19 deletions(-) diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtraci= ng/coresight/coresight-core.c index ea38ecf26fcb..0a9380350fb5 100644 --- a/drivers/hwtracing/coresight/coresight-core.c +++ b/drivers/hwtracing/coresight/coresight-core.c @@ -75,22 +75,54 @@ struct coresight_device *coresight_get_percpu_sink(int = cpu) } EXPORT_SYMBOL_GPL(coresight_get_percpu_sink); =20 +static struct coresight_device *coresight_get_source(struct list_head *pat= h) +{ + struct coresight_device *csdev; + + if (!path) + return NULL; + + csdev =3D list_first_entry(path, struct coresight_node, link)->csdev; + if (!coresight_is_device_source(csdev)) + return NULL; + + return csdev; +} + +/** + * coresight_blocks_source - checks whether the connection matches the sou= rce + * of path if connection is bound to specific source. + * @src: The source device of the trace path + * @conn: The connection of one outport + * + * Return false if the connection doesn't have a source binded or source o= f the + * path matches the source binds to connection. + */ +static bool coresight_blocks_source(struct coresight_device *src, + struct coresight_connection *conn) +{ + return conn->filter_src_fwnode && (conn->filter_src_dev !=3D src); +} + static struct coresight_connection * -coresight_find_out_connection(struct coresight_device *src_dev, - struct coresight_device *dest_dev) +coresight_find_out_connection(struct coresight_device *csdev, + struct coresight_device *out_dev, + struct coresight_device *trace_src) { int i; struct coresight_connection *conn; =20 - for (i =3D 0; i < src_dev->pdata->nr_outconns; i++) { - conn =3D src_dev->pdata->out_conns[i]; - if (conn->dest_dev =3D=3D dest_dev) + for (i =3D 0; i < csdev->pdata->nr_outconns; i++) { + conn =3D csdev->pdata->out_conns[i]; + if (coresight_blocks_source(trace_src, conn)) + continue; + if (conn->dest_dev =3D=3D out_dev) return conn; } =20 - dev_err(&src_dev->dev, - "couldn't find output connection, src_dev: %s, dest_dev: %s\n", - dev_name(&src_dev->dev), dev_name(&dest_dev->dev)); + dev_err(&csdev->dev, + "couldn't find output connection, csdev: %s, out_dev: %s\n", + dev_name(&csdev->dev), dev_name(&out_dev->dev)); =20 return ERR_PTR(-ENODEV); } @@ -251,7 +283,8 @@ static void coresight_disable_sink(struct coresight_dev= ice *csdev) =20 static int coresight_enable_link(struct coresight_device *csdev, struct coresight_device *parent, - struct coresight_device *child) + struct coresight_device *child, + struct coresight_device *source) { int link_subtype; struct coresight_connection *inconn, *outconn; @@ -259,8 +292,8 @@ static int coresight_enable_link(struct coresight_devic= e *csdev, if (!parent || !child) return -EINVAL; =20 - inconn =3D coresight_find_out_connection(parent, csdev); - outconn =3D coresight_find_out_connection(csdev, child); + inconn =3D coresight_find_out_connection(parent, csdev, source); + outconn =3D coresight_find_out_connection(csdev, child, source); link_subtype =3D csdev->subtype.link_subtype; =20 if (link_subtype =3D=3D CORESIGHT_DEV_SUBTYPE_LINK_MERG && IS_ERR(inconn)) @@ -273,15 +306,16 @@ static int coresight_enable_link(struct coresight_dev= ice *csdev, =20 static void coresight_disable_link(struct coresight_device *csdev, struct coresight_device *parent, - struct coresight_device *child) + struct coresight_device *child, + struct coresight_device *source) { struct coresight_connection *inconn, *outconn; =20 if (!parent || !child) return; =20 - inconn =3D coresight_find_out_connection(parent, csdev); - outconn =3D coresight_find_out_connection(csdev, child); + inconn =3D coresight_find_out_connection(parent, csdev, source); + outconn =3D coresight_find_out_connection(csdev, child, source); =20 link_ops(csdev)->disable(csdev, inconn, outconn); } @@ -375,7 +409,8 @@ static void coresight_disable_path_from(struct list_hea= d *path, case CORESIGHT_DEV_TYPE_LINK: parent =3D list_prev_entry(nd, link)->csdev; child =3D list_next_entry(nd, link)->csdev; - coresight_disable_link(csdev, parent, child); + coresight_disable_link(csdev, parent, child, + coresight_get_source(path)); break; default: break; @@ -418,7 +453,9 @@ int coresight_enable_path(struct list_head *path, enum = cs_mode mode, u32 type; struct coresight_node *nd; struct coresight_device *csdev, *parent, *child; + struct coresight_device *source; =20 + source =3D coresight_get_source(path); list_for_each_entry_reverse(nd, path, link) { csdev =3D nd->csdev; type =3D csdev->type; @@ -456,7 +493,7 @@ int coresight_enable_path(struct list_head *path, enum = cs_mode mode, case CORESIGHT_DEV_TYPE_LINK: parent =3D list_prev_entry(nd, link)->csdev; child =3D list_next_entry(nd, link)->csdev; - ret =3D coresight_enable_link(csdev, parent, child); + ret =3D coresight_enable_link(csdev, parent, child, source); if (ret) goto err; break; @@ -619,6 +656,7 @@ static void coresight_drop_device(struct coresight_devi= ce *csdev) /** * _coresight_build_path - recursively build a path from a @csdev to a sin= k. * @csdev: The device to start from. + * @source: The trace source device of the path. * @sink: The final sink we want in this path. * @path: The list to add devices to. * @@ -628,6 +666,7 @@ static void coresight_drop_device(struct coresight_devi= ce *csdev) * the source is the first device and the sink the last one. */ static int _coresight_build_path(struct coresight_device *csdev, + struct coresight_device *source, struct coresight_device *sink, struct list_head *path) { @@ -641,7 +680,7 @@ static int _coresight_build_path(struct coresight_devic= e *csdev, =20 if (coresight_is_percpu_source(csdev) && coresight_is_percpu_sink(sink) && sink =3D=3D per_cpu(csdev_sink, source_ops(csdev)->cpu_id(csdev))) { - if (_coresight_build_path(sink, sink, path) =3D=3D 0) { + if (_coresight_build_path(sink, source, sink, path) =3D=3D 0) { found =3D true; goto out; } @@ -652,8 +691,12 @@ static int _coresight_build_path(struct coresight_devi= ce *csdev, struct coresight_device *child_dev; =20 child_dev =3D csdev->pdata->out_conns[i]->dest_dev; + + if (coresight_blocks_source(source, csdev->pdata->out_conns[i])) + continue; + if (child_dev && - _coresight_build_path(child_dev, sink, path) =3D=3D 0) { + _coresight_build_path(child_dev, source, sink, path) =3D=3D 0) { found =3D true; break; } @@ -698,7 +741,7 @@ struct list_head *coresight_build_path(struct coresight= _device *source, =20 INIT_LIST_HEAD(path); =20 - rc =3D _coresight_build_path(source, sink, path); + rc =3D _coresight_build_path(source, source, sink, path); if (rc) { kfree(path); return ERR_PTR(rc); @@ -927,6 +970,16 @@ static int coresight_orphan_match(struct device *dev, = void *data) for (i =3D 0; i < src_csdev->pdata->nr_outconns; i++) { conn =3D src_csdev->pdata->out_conns[i]; =20 + /* Fix filter source device before skip the port */ + if (conn->filter_src_fwnode && !conn->filter_src_dev) { + if (dst_csdev && + (conn->filter_src_fwnode =3D=3D dst_csdev->dev.fwnode) && + !WARN_ON_ONCE(!coresight_is_device_source(dst_csdev))) + conn->filter_src_dev =3D dst_csdev; + else + still_orphan =3D true; + } + /* Skip the port if it's already connected. */ if (conn->dest_dev) continue; @@ -977,18 +1030,40 @@ static int coresight_fixup_orphan_conns(struct cores= ight_device *csdev) csdev, coresight_orphan_match); } =20 +static int coresight_clear_filter_source(struct device *dev, void *data) +{ + int i; + struct coresight_device *source =3D data; + struct coresight_device *csdev =3D to_coresight_device(dev); + + for (i =3D 0; i < csdev->pdata->nr_outconns; ++i) { + if (csdev->pdata->out_conns[i]->filter_src_dev =3D=3D source) + csdev->pdata->out_conns[i]->filter_src_dev =3D NULL; + } + return 0; +} + /* coresight_remove_conns - Remove other device's references to this devic= e */ static void coresight_remove_conns(struct coresight_device *csdev) { int i, j; struct coresight_connection *conn; =20 + if (coresight_is_device_source(csdev)) + bus_for_each_dev(&coresight_bustype, NULL, csdev, + coresight_clear_filter_source); + /* * Remove the input connection references from the destination device * for each output connection. */ for (i =3D 0; i < csdev->pdata->nr_outconns; i++) { conn =3D csdev->pdata->out_conns[i]; + if (conn->filter_src_fwnode) { + conn->filter_src_dev =3D NULL; + fwnode_handle_put(conn->filter_src_fwnode); + } + if (!conn->dest_dev) continue; =20 diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwt= racing/coresight/coresight-platform.c index 64e171eaad82..d5532caa9e92 100644 --- a/drivers/hwtracing/coresight/coresight-platform.c +++ b/drivers/hwtracing/coresight/coresight-platform.c @@ -243,6 +243,24 @@ static int of_coresight_parse_endpoint(struct device *= dev, conn.dest_fwnode =3D fwnode_handle_get(rdev_fwnode); conn.dest_port =3D rendpoint.port; =20 + /* + * Get the firmware node of the filter source through the + * reference. This could be used to filter the source in + * building path. + */ + conn.filter_src_fwnode =3D + fwnode_find_reference(&ep->fwnode, "filter-source", 0); + if (IS_ERR(conn.filter_src_fwnode)) { + conn.filter_src_fwnode =3D NULL; + } else { + conn.filter_src_dev =3D + coresight_find_csdev_by_fwnode(conn.filter_src_fwnode); + if (conn.filter_src_dev && + !coresight_is_device_source(conn.filter_src_dev)) + dev_warn(&conn.filter_src_dev->dev, + "Filter source is not a source device\n"); + } + new_conn =3D coresight_add_out_conn(dev, pdata, &conn); if (IS_ERR_VALUE(new_conn)) { fwnode_handle_put(conn.dest_fwnode); diff --git a/include/linux/coresight.h b/include/linux/coresight.h index 9311df8538fc..f372c01ae2fc 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -172,6 +172,9 @@ struct coresight_desc { * @dest_dev: a @coresight_device representation of the component connected to @src_port. 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charset="utf-8" Since the new funnel device supports multi-port output scenarios, there may be more than one TPDM connected to one TPDA. In this way, when reading the element size of the TPDM, TPDA driver needs to find the expected TPDM corresponding to the filter source. When TPDA finds a TPDM or a filter source from a input connection, it will read the Devicetree to get the expected TPDM's element size. Signed-off-by: Tao Zhang --- drivers/hwtracing/coresight/coresight-tpda.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtraci= ng/coresight/coresight-tpda.c index ad023a2a99d1..413828f19d60 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.c +++ b/drivers/hwtracing/coresight/coresight-tpda.c @@ -110,6 +110,16 @@ static int tpda_get_element_size(struct tpda_drvdata *= drvdata, csdev->pdata->in_conns[i]->dest_port !=3D inport) continue; =20 + /* + * If this port has a hardcoded filter, use the source + * device directly. + */ + if (csdev->pdata->in_conns[i]->filter_src_fwnode) { + in =3D csdev->pdata->in_conns[i]->filter_src_dev; + if (!in) + continue; + } + if (coresight_device_is_tpdm(in)) { if (drvdata->dsb_esize || drvdata->cmb_esize) return -EEXIST; @@ -124,7 +134,6 @@ static int tpda_get_element_size(struct tpda_drvdata *d= rvdata, } } =20 - return rc; } =20 --=20 2.17.1