Merge tag 'coresight-next-v6.1' of...

Merge tag 'coresight-next-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux into char-misc-next

Suzuki writes:
  "coresight: Changes for v6.1

   Coresight trace subsystem updates for v6.1 includes:
     - Support for HiSilicon PTT trace
     - Coresight cleanup of sysfs accessor functions, reduced
       code size.
     - Expose coresight timestamp source for ETMv4+
     - DT binding updates to include missing properties
     - Minor documentation, Kconfig text fixes.

   Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>"

* tag 'coresight-next-v6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux:
  hwtracing: hisi_ptt: Fix up for "iommu/dma: Make header private"
  MAINTAINERS: Add maintainer for HiSilicon PTT driver
  docs: trace: Add HiSilicon PTT device driver documentation
  hwtracing: hisi_ptt: Add tune function support for HiSilicon PCIe Tune and Trace device
  hwtracing: hisi_ptt: Add trace function support for HiSilicon PCIe Tune and Trace device
  iommu/arm-smmu-v3: Make default domain type of HiSilicon PTT device to identity
  coresight: cti-sysfs: Mark coresight_cti_reg_store() as __maybe_unused
  coresight: Make new csdev_access offsets unsigned
  coresight: cti-sysfs: Re-use same functions for similar sysfs register accessors
  coresight: Re-use same function for similar sysfs register accessors
  coresight: Simplify sysfs accessors by using csdev_access abstraction
  coresight: Remove unused function parameter
  coresight: etm4x: docs: Add documentation for 'ts_source' sysfs interface
  coresight: etm4x: Expose default timestamp source in sysfs
  dt-bindings: arm: coresight-tmc: Add 'iommu' property
  dt-bindings: arm: coresight: Add 'power-domains' property
  coresight: docs: Fix a broken reference
  coresight: trbe: fix Kconfig "its" grammar

Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x

@@ -516,3 +516,11 @@ Contact:	Mathieu Poirier <mathieu.poirier@linaro.org>
 Description:	(Read) Returns the number of special conditional P1 right-hand keys
 		that the trace unit can use (0x194).  The value is taken
 		directly from the HW.
+
+What:		/sys/bus/coresight/devices/etm<N>/ts_source
+Date:		October 2022
+KernelVersion:	6.1
+Contact:	Mathieu Poirier <mathieu.poirier@linaro.org> or Suzuki K Poulose <suzuki.poulose@arm.com>
+Description:	(Read) When FEAT_TRF is implemented, value of TRFCR_ELx.TS used for
+		trace session. Otherwise -1 indicates an unknown time source. Check
+		trcidr0.tssize to see if a global timestamp is available.

Documentation/ABI/testing/sysfs-devices-hisi_ptt

+What:		/sys/devices/hisi_ptt<sicl_id>_<core_id>/tune
+Date:		October 2022
+KernelVersion:	6.1
+Contact:	Yicong Yang <yangyicong@hisilicon.com>
+Description:	This directory contains files for tuning the PCIe link
+		parameters(events). Each file is named after the event
+		of the PCIe link.
+
+		See Documentation/trace/hisi-ptt.rst for more information.
+
+What:		/sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/qos_tx_cpl
+Date:		October 2022
+KernelVersion:	6.1
+Contact:	Yicong Yang <yangyicong@hisilicon.com>
+Description:	(RW) Controls the weight of Tx completion TLPs, which influence
+		the proportion of outbound completion TLPs on the PCIe link.
+		The available tune data is [0, 1, 2]. Writing a negative value
+		will return an error, and out of range values will be converted
+		to 2. The value indicates a probable level of the event.
+
+What:		/sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/qos_tx_np
+Date:		October 2022
+KernelVersion:	6.1
+Contact:	Yicong Yang <yangyicong@hisilicon.com>
+Description:	(RW) Controls the weight of Tx non-posted TLPs, which influence
+		the proportion of outbound non-posted TLPs on the PCIe link.
+		The available tune data is [0, 1, 2]. Writing a negative value
+		will return an error, and out of range values will be converted
+		to 2. The value indicates a probable level of the event.
+
+What:		/sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/qos_tx_p
+Date:		October 2022
+KernelVersion:	6.1
+Contact:	Yicong Yang <yangyicong@hisilicon.com>
+Description:	(RW) Controls the weight of Tx posted TLPs, which influence the
+		proportion of outbound posted TLPs on the PCIe link.
+		The available tune data is [0, 1, 2]. Writing a negative value
+		will return an error, and out of range values will be converted
+		to 2. The value indicates a probable level of the event.
+
+What:		/sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/rx_alloc_buf_level
+Date:		October 2022
+KernelVersion:	6.1
+Contact:	Yicong Yang <yangyicong@hisilicon.com>
+Description:	(RW) Control the allocated buffer watermark for inbound packets.
+		The packets will be stored in the buffer first and then transmitted
+		either when the watermark reached or when timed out.
+		The available tune data is [0, 1, 2]. Writing a negative value
+		will return an error, and out of range values will be converted
+		to 2. The value indicates a probable level of the event.
+
+What:		/sys/devices/hisi_ptt<sicl_id>_<core_id>/tune/tx_alloc_buf_level
+Date:		October 2022
+KernelVersion:	6.1
+Contact:	Yicong Yang <yangyicong@hisilicon.com>
+Description:	(RW) Control the allocated buffer watermark of outbound packets.
+		The packets will be stored in the buffer first and then transmitted
+		either when the watermark reached or when timed out.
+		The available tune data is [0, 1, 2]. Writing a negative value
+		will return an error, and out of range values will be converted
+		to 2. The value indicates a probable level of the event.

Documentation/devicetree/bindings/arm/arm,coresight-catu.yaml

@@ -61,6 +61,9 @@ properties:
     maxItems: 1
     description: Address translation error interrupt
 
+  power-domains:
+    maxItems: 1
+
   in-ports:
     $ref: /schemas/graph.yaml#/properties/ports
     additionalProperties: false

Documentation/devicetree/bindings/arm/arm,coresight-cti.yaml

@@ -98,6 +98,9 @@ properties:
       base cti node if compatible string arm,coresight-cti-v8-arch is used,
       or may appear in a trig-conns child node when appropriate.
 
+  power-domains:
+    maxItems: 1
+
   arm,cti-ctm-id:
     $ref: /schemas/types.yaml#/definitions/uint32
     description:

Documentation/devicetree/bindings/arm/arm,coresight-dynamic-funnel.yaml

@@ -54,6 +54,9 @@ properties:
       - const: apb_pclk
       - const: atclk
 
+  power-domains:
+    maxItems: 1
+
   in-ports:
     $ref: /schemas/graph.yaml#/properties/ports
 

Documentation/devicetree/bindings/arm/arm,coresight-dynamic-replicator.yaml

@@ -54,6 +54,9 @@ properties:
       - const: apb_pclk
       - const: atclk
 
+  power-domains:
+    maxItems: 1
+
   qcom,replicator-loses-context:
     type: boolean
     description:

Documentation/devicetree/bindings/arm/arm,coresight-etb10.yaml

@@ -54,6 +54,9 @@ properties:
       - const: apb_pclk
       - const: atclk
 
+  power-domains:
+    maxItems: 1
+
   in-ports:
     $ref: /schemas/graph.yaml#/properties/ports
     additionalProperties: false

Documentation/devicetree/bindings/arm/arm,coresight-etm.yaml

@@ -73,6 +73,9 @@ properties:
       - const: apb_pclk
       - const: atclk
 
+  power-domains:
+    maxItems: 1
+
   arm,coresight-loses-context-with-cpu:
     type: boolean
     description:

Documentation/devicetree/bindings/arm/arm,coresight-static-funnel.yaml

@@ -27,6 +27,9 @@ properties:
   compatible:
     const: arm,coresight-static-funnel
 
+  power-domains:
+    maxItems: 1
+
   in-ports:
     $ref: /schemas/graph.yaml#/properties/ports
 

Documentation/devicetree/bindings/arm/arm,coresight-static-replicator.yaml

@@ -27,6 +27,9 @@ properties:
   compatible:
     const: arm,coresight-static-replicator
 
+  power-domains:
+    maxItems: 1
+
   in-ports:
     $ref: /schemas/graph.yaml#/properties/ports
     additionalProperties: false

Documentation/devicetree/bindings/arm/arm,coresight-stm.yaml

@@ -61,6 +61,9 @@ properties:
       - const: apb_pclk
       - const: atclk
 
+  power-domains:
+    maxItems: 1
+
   out-ports:
     $ref: /schemas/graph.yaml#/properties/ports
     additionalProperties: false

Documentation/devicetree/bindings/arm/arm,coresight-tmc.yaml

@@ -55,6 +55,12 @@ properties:
       - const: apb_pclk
       - const: atclk
 
+  iommus:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
   arm,buffer-size:
     $ref: /schemas/types.yaml#/definitions/uint32
     deprecated: true

Documentation/devicetree/bindings/arm/arm,coresight-tpiu.yaml

@@ -54,6 +54,9 @@ properties:
       - const: apb_pclk
       - const: atclk
 
+  power-domains:
+    maxItems: 1
+
   in-ports:
     $ref: /schemas/graph.yaml#/properties/ports
     additionalProperties: false

Documentation/devicetree/bindings/arm/arm,embedded-trace-extension.yaml

@@ -33,6 +33,9 @@ properties:
       Handle to the cpu this ETE is bound to.
     $ref: /schemas/types.yaml#/definitions/phandle
 
+  power-domains:
+    maxItems: 1
+
   out-ports:
     description: |
       Output connections from the ETE to legacy CoreSight trace bus.

Documentation/trace/coresight/coresight-cpu-debug.rst

@@ -117,7 +117,8 @@ divide into below cases:
 Device Tree Bindings
 --------------------
 
-See Documentation/devicetree/bindings/arm/coresight-cpu-debug.txt for details.
+See Documentation/devicetree/bindings/arm/arm,coresight-cpu-debug.yaml for
+details.
 
 
 How to use the module

Documentation/trace/coresight/coresight-etm4x-reference.rst

@@ -71,6 +71,20 @@ the ‘TRC’ prefix.
 
 ----
 
+:File:            ``ts_source`` (ro)
+:Trace Registers: None.
+:Notes:
+    When FEAT_TRF is implemented, value of TRFCR_ELx.TS used for trace session. Otherwise -1
+    indicates an unknown time source. Check trcidr0.tssize to see if a global timestamp is
+    available.
+
+:Example:
+    ``$> cat ts_source``
+
+    ``$> 1``
+
+----
+
 :File:            ``addr_idx`` (rw)
 :Trace Registers: None.
 :Notes:

Documentation/trace/index.rst

@@ -33,3 +33,4 @@ Linux Tracing Technologies
    coresight/index
    user_events
    rv/index
+   hisi-ptt

MAINTAINERS

@@ -9180,6 +9180,14 @@ S:	Supported
 F:	Documentation/admin-guide/perf/hns3-pmu.rst
 F:	drivers/perf/hisilicon/hns3_pmu.c
 
+HISILICON PTT DRIVER
+M:	Yicong Yang <yangyicong@hisilicon.com>
+L:	linux-kernel@vger.kernel.org
+S:	Maintained
+F:	Documentation/ABI/testing/sysfs-devices-hisi_ptt
+F:	Documentation/trace/hisi-ptt.rst
+F:	drivers/hwtracing/ptt/
+
 HISILICON QM DRIVER
 M:	Weili Qian <qianweili@huawei.com>
 M:	Zhou Wang <wangzhou1@hisilicon.com>

arch/arm64/include/asm/sysreg.h

@@ -1021,6 +1021,7 @@
 #define SYS_MPIDR_SAFE_VAL	(BIT(31))
 
 #define TRFCR_ELx_TS_SHIFT		5
+#define TRFCR_ELx_TS_MASK		((0x3UL) << TRFCR_ELx_TS_SHIFT)
 #define TRFCR_ELx_TS_VIRTUAL		((0x1UL) << TRFCR_ELx_TS_SHIFT)
 #define TRFCR_ELx_TS_GUEST_PHYSICAL	((0x2UL) << TRFCR_ELx_TS_SHIFT)
 #define TRFCR_ELx_TS_PHYSICAL		((0x3UL) << TRFCR_ELx_TS_SHIFT)

drivers/Makefile

@@ -175,6 +175,7 @@ obj-$(CONFIG_USB4)		+= thunderbolt/
 obj-$(CONFIG_CORESIGHT)		+= hwtracing/coresight/
 obj-y				+= hwtracing/intel_th/
 obj-$(CONFIG_STM)		+= hwtracing/stm/
+obj-$(CONFIG_HISI_PTT)		+= hwtracing/ptt/
 obj-y				+= android/
 obj-$(CONFIG_NVMEM)		+= nvmem/
 obj-$(CONFIG_FPGA)		+= fpga/

drivers/hwtracing/Kconfig

@@ -5,4 +5,6 @@ source "drivers/hwtracing/stm/Kconfig"
 
 source "drivers/hwtracing/intel_th/Kconfig"
 
+source "drivers/hwtracing/ptt/Kconfig"
+
 endmenu

drivers/hwtracing/coresight/Kconfig

@@ -193,10 +193,10 @@ config CORESIGHT_TRBE
 	depends on ARM64 && CORESIGHT_SOURCE_ETM4X
 	help
 	  This driver provides support for percpu Trace Buffer Extension (TRBE).
-	  TRBE always needs to be used along with it's corresponding percpu ETE
+	  TRBE always needs to be used along with its corresponding percpu ETE
 	  component. ETE generates trace data which is then captured with TRBE.
 	  Unlike traditional sink devices, TRBE is a CPU feature accessible via
-	  system registers. But it's explicit dependency with trace unit (ETE)
+	  system registers. But its explicit dependency with trace unit (ETE)
 	  requires it to be plugged in as a coresight sink device.
 
 	  To compile this driver as a module, choose M here: the module will be

drivers/hwtracing/coresight/coresight-catu.c

@@ -365,26 +365,15 @@ static const struct etr_buf_operations etr_catu_buf_ops = {
 	.get_data = catu_get_data_etr_buf,
 };
 
-coresight_simple_reg32(struct catu_drvdata, devid, CORESIGHT_DEVID);
-coresight_simple_reg32(struct catu_drvdata, control, CATU_CONTROL);
-coresight_simple_reg32(struct catu_drvdata, status, CATU_STATUS);
-coresight_simple_reg32(struct catu_drvdata, mode, CATU_MODE);
-coresight_simple_reg32(struct catu_drvdata, axictrl, CATU_AXICTRL);
-coresight_simple_reg32(struct catu_drvdata, irqen, CATU_IRQEN);
-coresight_simple_reg64(struct catu_drvdata, sladdr,
-		       CATU_SLADDRLO, CATU_SLADDRHI);
-coresight_simple_reg64(struct catu_drvdata, inaddr,
-		       CATU_INADDRLO, CATU_INADDRHI);
-
 static struct attribute *catu_mgmt_attrs[] = {
-	&dev_attr_devid.attr,
-	&dev_attr_control.attr,
-	&dev_attr_status.attr,
-	&dev_attr_mode.attr,
-	&dev_attr_axictrl.attr,
-	&dev_attr_irqen.attr,
-	&dev_attr_sladdr.attr,
-	&dev_attr_inaddr.attr,
+	coresight_simple_reg32(devid, CORESIGHT_DEVID),
+	coresight_simple_reg32(control, CATU_CONTROL),
+	coresight_simple_reg32(status, CATU_STATUS),
+	coresight_simple_reg32(mode, CATU_MODE),
+	coresight_simple_reg32(axictrl, CATU_AXICTRL),
+	coresight_simple_reg32(irqen, CATU_IRQEN),
+	coresight_simple_reg64(sladdr, CATU_SLADDRLO, CATU_SLADDRHI),
+	coresight_simple_reg64(inaddr, CATU_INADDRLO, CATU_INADDRHI),
 	NULL,
 };
 

drivers/hwtracing/coresight/coresight-catu.h

@@ -70,24 +70,24 @@ struct catu_drvdata {
 static inline u32							\
 catu_read_##name(struct catu_drvdata *drvdata)				\
 {									\
-	return coresight_read_reg_pair(drvdata->base, offset, -1);	\
+	return csdev_access_relaxed_read32(&drvdata->csdev->access, offset); \
 }									\
 static inline void							\
 catu_write_##name(struct catu_drvdata *drvdata, u32 val)		\
 {									\
-	coresight_write_reg_pair(drvdata->base, val, offset, -1);	\
+	csdev_access_relaxed_write32(&drvdata->csdev->access, val, offset); \
 }
 
 #define CATU_REG_PAIR(name, lo_off, hi_off)				\
 static inline u64							\
 catu_read_##name(struct catu_drvdata *drvdata)				\
 {									\
-	return coresight_read_reg_pair(drvdata->base, lo_off, hi_off);	\
+	return csdev_access_relaxed_read_pair(&drvdata->csdev->access, lo_off, hi_off); \
 }									\
 static inline void							\
 catu_write_##name(struct catu_drvdata *drvdata, u64 val)		\
 {									\
-	coresight_write_reg_pair(drvdata->base, val, lo_off, hi_off);	\
+	csdev_access_relaxed_write_pair(&drvdata->csdev->access, val, lo_off, hi_off); \
 }
 
 CATU_REG32(control, CATU_CONTROL);

drivers/hwtracing/coresight/coresight-core.c

@@ -60,6 +60,34 @@ EXPORT_SYMBOL_GPL(coresight_barrier_pkt);
 
 static const struct cti_assoc_op *cti_assoc_ops;
 
+ssize_t coresight_simple_show_pair(struct device *_dev,
+			      struct device_attribute *attr, char *buf)
+{
+	struct coresight_device *csdev = container_of(_dev, struct coresight_device, dev);
+	struct cs_pair_attribute *cs_attr = container_of(attr, struct cs_pair_attribute, attr);
+	u64 val;
+
+	pm_runtime_get_sync(_dev->parent);
+	val = csdev_access_relaxed_read_pair(&csdev->access, cs_attr->lo_off, cs_attr->hi_off);
+	pm_runtime_put_sync(_dev->parent);
+	return sysfs_emit(buf, "0x%llx\n", val);
+}
+EXPORT_SYMBOL_GPL(coresight_simple_show_pair);
+
+ssize_t coresight_simple_show32(struct device *_dev,
+			      struct device_attribute *attr, char *buf)
+{
+	struct coresight_device *csdev = container_of(_dev, struct coresight_device, dev);
+	struct cs_off_attribute *cs_attr = container_of(attr, struct cs_off_attribute, attr);
+	u64 val;
+
+	pm_runtime_get_sync(_dev->parent);
+	val = csdev_access_relaxed_read32(&csdev->access, cs_attr->off);
+	pm_runtime_put_sync(_dev->parent);
+	return sysfs_emit(buf, "0x%llx\n", val);
+}
+EXPORT_SYMBOL_GPL(coresight_simple_show32);
+
 void coresight_set_cti_ops(const struct cti_assoc_op *cti_op)
 {
 	cti_assoc_ops = cti_op;

drivers/hwtracing/coresight/coresight-cti-sysfs.c

@@ -163,48 +163,82 @@ static struct attribute *coresight_cti_attrs[] = {
 
 /* register based attributes */
 
-/* macro to access RO registers with power check only (no enable check). */
-#define coresight_cti_reg(name, offset)			\
-static ssize_t name##_show(struct device *dev,				\
-			   struct device_attribute *attr, char *buf)	\
-{									\
-	struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);	\
-	u32 val = 0;							\
-	pm_runtime_get_sync(dev->parent);				\
-	spin_lock(&drvdata->spinlock);					\
-	if (drvdata->config.hw_powered)					\
-		val = readl_relaxed(drvdata->base + offset);		\
-	spin_unlock(&drvdata->spinlock);				\
-	pm_runtime_put_sync(dev->parent);				\
-	return sprintf(buf, "0x%x\n", val);				\
-}									\
-static DEVICE_ATTR_RO(name)
+/* Read registers with power check only (no enable check). */
+static ssize_t coresight_cti_reg_show(struct device *dev,
+			   struct device_attribute *attr, char *buf)
+{
+	struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+	struct cs_off_attribute *cti_attr = container_of(attr, struct cs_off_attribute, attr);
+	u32 val = 0;
 
-/* coresight management registers */
-coresight_cti_reg(devaff0, CTIDEVAFF0);
-coresight_cti_reg(devaff1, CTIDEVAFF1);
-coresight_cti_reg(authstatus, CORESIGHT_AUTHSTATUS);
-coresight_cti_reg(devarch, CORESIGHT_DEVARCH);
-coresight_cti_reg(devid, CORESIGHT_DEVID);
-coresight_cti_reg(devtype, CORESIGHT_DEVTYPE);
-coresight_cti_reg(pidr0, CORESIGHT_PERIPHIDR0);
-coresight_cti_reg(pidr1, CORESIGHT_PERIPHIDR1);
-coresight_cti_reg(pidr2, CORESIGHT_PERIPHIDR2);
-coresight_cti_reg(pidr3, CORESIGHT_PERIPHIDR3);
-coresight_cti_reg(pidr4, CORESIGHT_PERIPHIDR4);
+	pm_runtime_get_sync(dev->parent);
+	spin_lock(&drvdata->spinlock);
+	if (drvdata->config.hw_powered)
+		val = readl_relaxed(drvdata->base + cti_attr->off);
+	spin_unlock(&drvdata->spinlock);
+	pm_runtime_put_sync(dev->parent);
+	return sysfs_emit(buf, "0x%x\n", val);
+}
 
+/* Write registers with power check only (no enable check). */
+static __maybe_unused ssize_t coresight_cti_reg_store(struct device *dev,
+						      struct device_attribute *attr,
+						      const char *buf, size_t size)
+{
+	struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);
+	struct cs_off_attribute *cti_attr = container_of(attr, struct cs_off_attribute, attr);
+	unsigned long val = 0;
+
+	if (kstrtoul(buf, 0, &val))
+		return -EINVAL;
+
+	pm_runtime_get_sync(dev->parent);
+	spin_lock(&drvdata->spinlock);
+	if (drvdata->config.hw_powered)
+		cti_write_single_reg(drvdata, cti_attr->off, val);
+	spin_unlock(&drvdata->spinlock);
+	pm_runtime_put_sync(dev->parent);
+	return size;
+}
+
+#define coresight_cti_reg(name, offset)					\
+	(&((struct cs_off_attribute[]) {				\
+	   {								\
+		__ATTR(name, 0444, coresight_cti_reg_show, NULL),	\
+		offset							\
+	   }								\
+	})[0].attr.attr)
+
+#define coresight_cti_reg_rw(name, offset)				\
+	(&((struct cs_off_attribute[]) {				\
+	   {								\
+		__ATTR(name, 0644, coresight_cti_reg_show,		\
+		       coresight_cti_reg_store),			\
+		offset							\
+	   }								\
+	})[0].attr.attr)
+
+#define coresight_cti_reg_wo(name, offset)				\
+	(&((struct cs_off_attribute[]) {				\
+	   {								\
+		__ATTR(name, 0200, NULL, coresight_cti_reg_store),	\
+		offset							\
+	   }								\
+	})[0].attr.attr)
+
+/* coresight management registers */
 static struct attribute *coresight_cti_mgmt_attrs[] = {
-	&dev_attr_devaff0.attr,
-	&dev_attr_devaff1.attr,
-	&dev_attr_authstatus.attr,
-	&dev_attr_devarch.attr,
-	&dev_attr_devid.attr,
-	&dev_attr_devtype.attr,
-	&dev_attr_pidr0.attr,
-	&dev_attr_pidr1.attr,
-	&dev_attr_pidr2.attr,
-	&dev_attr_pidr3.attr,
-	&dev_attr_pidr4.attr,
+	coresight_cti_reg(devaff0, CTIDEVAFF0),
+	coresight_cti_reg(devaff1, CTIDEVAFF1),
+	coresight_cti_reg(authstatus, CORESIGHT_AUTHSTATUS),
+	coresight_cti_reg(devarch, CORESIGHT_DEVARCH),
+	coresight_cti_reg(devid, CORESIGHT_DEVID),
+	coresight_cti_reg(devtype, CORESIGHT_DEVTYPE),
+	coresight_cti_reg(pidr0, CORESIGHT_PERIPHIDR0),
+	coresight_cti_reg(pidr1, CORESIGHT_PERIPHIDR1),
+	coresight_cti_reg(pidr2, CORESIGHT_PERIPHIDR2),
+	coresight_cti_reg(pidr3, CORESIGHT_PERIPHIDR3),
+	coresight_cti_reg(pidr4, CORESIGHT_PERIPHIDR4),
 	NULL,
 };
 
@@ -454,86 +488,11 @@ static ssize_t apppulse_store(struct device *dev,
 }
 static DEVICE_ATTR_WO(apppulse);
 
-coresight_cti_reg(triginstatus, CTITRIGINSTATUS);
-coresight_cti_reg(trigoutstatus, CTITRIGOUTSTATUS);
-coresight_cti_reg(chinstatus, CTICHINSTATUS);
-coresight_cti_reg(choutstatus, CTICHOUTSTATUS);
-
 /*
  * Define CONFIG_CORESIGHT_CTI_INTEGRATION_REGS to enable the access to the
  * integration control registers. Normally only used to investigate connection
  * data.
  */
-#ifdef CONFIG_CORESIGHT_CTI_INTEGRATION_REGS
-
-/* macro to access RW registers with power check only (no enable check). */
-#define coresight_cti_reg_rw(name, offset)				\
-static ssize_t name##_show(struct device *dev,				\
-			   struct device_attribute *attr, char *buf)	\
-{									\
-	struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);	\
-	u32 val = 0;							\
-	pm_runtime_get_sync(dev->parent);				\
-	spin_lock(&drvdata->spinlock);					\
-	if (drvdata->config.hw_powered)					\
-		val = readl_relaxed(drvdata->base + offset);		\
-	spin_unlock(&drvdata->spinlock);				\
-	pm_runtime_put_sync(dev->parent);				\
-	return sprintf(buf, "0x%x\n", val);				\
-}									\
-									\
-static ssize_t name##_store(struct device *dev,				\
-			    struct device_attribute *attr,		\
-			    const char *buf, size_t size)		\
-{									\
-	struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);	\
-	unsigned long val = 0;						\
-	if (kstrtoul(buf, 0, &val))					\
-		return -EINVAL;						\
-									\
-	pm_runtime_get_sync(dev->parent);				\
-	spin_lock(&drvdata->spinlock);					\
-	if (drvdata->config.hw_powered)					\
-		cti_write_single_reg(drvdata, offset, val);		\
-	spin_unlock(&drvdata->spinlock);				\
-	pm_runtime_put_sync(dev->parent);				\
-	return size;							\
-}									\
-static DEVICE_ATTR_RW(name)
-
-/* macro to access WO registers with power check only (no enable check). */
-#define coresight_cti_reg_wo(name, offset)				\
-static ssize_t name##_store(struct device *dev,				\
-			    struct device_attribute *attr,		\
-			    const char *buf, size_t size)		\
-{									\
-	struct cti_drvdata *drvdata = dev_get_drvdata(dev->parent);	\
-	unsigned long val = 0;						\
-	if (kstrtoul(buf, 0, &val))					\
-		return -EINVAL;						\
-									\
-	pm_runtime_get_sync(dev->parent);				\
-	spin_lock(&drvdata->spinlock);					\
-	if (drvdata->config.hw_powered)					\
-		cti_write_single_reg(drvdata, offset, val);		\
-	spin_unlock(&drvdata->spinlock);				\
-	pm_runtime_put_sync(dev->parent);				\
-	return size;							\
-}									\
-static DEVICE_ATTR_WO(name)
-
-coresight_cti_reg_rw(itchout, ITCHOUT);
-coresight_cti_reg_rw(ittrigout, ITTRIGOUT);
-coresight_cti_reg_rw(itctrl, CORESIGHT_ITCTRL);
-coresight_cti_reg_wo(itchinack, ITCHINACK);
-coresight_cti_reg_wo(ittriginack, ITTRIGINACK);
-coresight_cti_reg(ittrigin, ITTRIGIN);
-coresight_cti_reg(itchin, ITCHIN);
-coresight_cti_reg(itchoutack, ITCHOUTACK);
-coresight_cti_reg(ittrigoutack, ITTRIGOUTACK);
-
-#endif /* CORESIGHT_CTI_INTEGRATION_REGS */
-
 static struct attribute *coresight_cti_regs_attrs[] = {
 	&dev_attr_inout_sel.attr,
 	&dev_attr_inen.attr,
@@ -544,20 +503,20 @@ static struct attribute *coresight_cti_regs_attrs[] = {
 	&dev_attr_appset.attr,
 	&dev_attr_appclear.attr,
 	&dev_attr_apppulse.attr,
-	&dev_attr_triginstatus.attr,
-	&dev_attr_trigoutstatus.attr,
-	&dev_attr_chinstatus.attr,
-	&dev_attr_choutstatus.attr,
+	coresight_cti_reg(triginstatus, CTITRIGINSTATUS),
+	coresight_cti_reg(trigoutstatus, CTITRIGOUTSTATUS),
+	coresight_cti_reg(chinstatus, CTICHINSTATUS),
+	coresight_cti_reg(choutstatus, CTICHOUTSTATUS),
 #ifdef CONFIG_CORESIGHT_CTI_INTEGRATION_REGS
-	&dev_attr_itctrl.attr,
-	&dev_attr_ittrigin.attr,
-	&dev_attr_itchin.attr,
-	&dev_attr_ittrigout.attr,
-	&dev_attr_itchout.attr,
-	&dev_attr_itchoutack.attr,
-	&dev_attr_ittrigoutack.attr,
-	&dev_attr_ittriginack.attr,
-	&dev_attr_itchinack.attr,
+	coresight_cti_reg_rw(itctrl, CORESIGHT_ITCTRL),
+	coresight_cti_reg(ittrigin, ITTRIGIN),
+	coresight_cti_reg(itchin, ITCHIN),
+	coresight_cti_reg_rw(ittrigout, ITTRIGOUT),
+	coresight_cti_reg_rw(itchout, ITCHOUT),
+	coresight_cti_reg(itchoutack, ITCHOUTACK),
+	coresight_cti_reg(ittrigoutack, ITTRIGOUTACK),
+	coresight_cti_reg_wo(ittriginack, ITTRIGINACK),
+	coresight_cti_reg_wo(itchinack, ITCHINACK),
 #endif
 	NULL,
 };

drivers/hwtracing/coresight/coresight-etb10.c

@@ -655,27 +655,15 @@ static const struct file_operations etb_fops = {
 	.llseek		= no_llseek,
 };
 
-#define coresight_etb10_reg(name, offset)		\
-	coresight_simple_reg32(struct etb_drvdata, name, offset)
-
-coresight_etb10_reg(rdp, ETB_RAM_DEPTH_REG);
-coresight_etb10_reg(sts, ETB_STATUS_REG);
-coresight_etb10_reg(rrp, ETB_RAM_READ_POINTER);
-coresight_etb10_reg(rwp, ETB_RAM_WRITE_POINTER);
-coresight_etb10_reg(trg, ETB_TRG);
-coresight_etb10_reg(ctl, ETB_CTL_REG);
-coresight_etb10_reg(ffsr, ETB_FFSR);
-coresight_etb10_reg(ffcr, ETB_FFCR);
-
 static struct attribute *coresight_etb_mgmt_attrs[] = {
-	&dev_attr_rdp.attr,
-	&dev_attr_sts.attr,
-	&dev_attr_rrp.attr,
-	&dev_attr_rwp.attr,
-	&dev_attr_trg.attr,
-	&dev_attr_ctl.attr,
-	&dev_attr_ffsr.attr,
-	&dev_attr_ffcr.attr,
+	coresight_simple_reg32(rdp, ETB_RAM_DEPTH_REG),
+	coresight_simple_reg32(sts, ETB_STATUS_REG),
+	coresight_simple_reg32(rrp, ETB_RAM_READ_POINTER),
+	coresight_simple_reg32(rwp, ETB_RAM_WRITE_POINTER),
+	coresight_simple_reg32(trg, ETB_TRG),
+	coresight_simple_reg32(ctl, ETB_CTL_REG),
+	coresight_simple_reg32(ffsr, ETB_FFSR),
+	coresight_simple_reg32(ffcr, ETB_FFCR),
 	NULL,
 };
 

drivers/hwtracing/coresight/coresight-etm3x-sysfs.c

@@ -1252,31 +1252,17 @@ static struct attribute *coresight_etm_attrs[] = {
 	NULL,
 };
 
-#define coresight_etm3x_reg(name, offset)			\
-	coresight_simple_reg32(struct etm_drvdata, name, offset)
-
-coresight_etm3x_reg(etmccr, ETMCCR);
-coresight_etm3x_reg(etmccer, ETMCCER);
-coresight_etm3x_reg(etmscr, ETMSCR);
-coresight_etm3x_reg(etmidr, ETMIDR);
-coresight_etm3x_reg(etmcr, ETMCR);
-coresight_etm3x_reg(etmtraceidr, ETMTRACEIDR);
-coresight_etm3x_reg(etmteevr, ETMTEEVR);
-coresight_etm3x_reg(etmtssvr, ETMTSSCR);
-coresight_etm3x_reg(etmtecr1, ETMTECR1);
-coresight_etm3x_reg(etmtecr2, ETMTECR2);
-
 static struct attribute *coresight_etm_mgmt_attrs[] = {
-	&dev_attr_etmccr.attr,
-	&dev_attr_etmccer.attr,
-	&dev_attr_etmscr.attr,
-	&dev_attr_etmidr.attr,
-	&dev_attr_etmcr.attr,
-	&dev_attr_etmtraceidr.attr,
-	&dev_attr_etmteevr.attr,
-	&dev_attr_etmtssvr.attr,
-	&dev_attr_etmtecr1.attr,
-	&dev_attr_etmtecr2.attr,
+	coresight_simple_reg32(etmccr, ETMCCR),
+	coresight_simple_reg32(etmccer, ETMCCER),
+	coresight_simple_reg32(etmscr, ETMSCR),
+	coresight_simple_reg32(etmidr, ETMIDR),
+	coresight_simple_reg32(etmcr, ETMCR),
+	coresight_simple_reg32(etmtraceidr, ETMTRACEIDR),
+	coresight_simple_reg32(etmteevr, ETMTEEVR),
+	coresight_simple_reg32(etmtssvr, ETMTSSCR),
+	coresight_simple_reg32(etmtecr1, ETMTECR1),
+	coresight_simple_reg32(etmtecr2, ETMTECR2),
 	NULL,
 };
 

drivers/hwtracing/coresight/coresight-etm4x-sysfs.c

@@ -2306,6 +2306,34 @@ static ssize_t cpu_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(cpu);
 
+static ssize_t ts_source_show(struct device *dev,
+			      struct device_attribute *attr,
+			      char *buf)
+{
+	int val;
+	struct etmv4_drvdata *drvdata = dev_get_drvdata(dev->parent);
+
+	if (!drvdata->trfcr) {
+		val = -1;
+		goto out;
+	}
+
+	switch (drvdata->trfcr & TRFCR_ELx_TS_MASK) {
+	case TRFCR_ELx_TS_VIRTUAL:
+	case TRFCR_ELx_TS_GUEST_PHYSICAL:
+	case TRFCR_ELx_TS_PHYSICAL:
+		val = FIELD_GET(TRFCR_ELx_TS_MASK, drvdata->trfcr);
+		break;
+	default:
+		val = -1;
+		break;
+	}
+
+out:
+	return sysfs_emit(buf, "%d\n", val);
+}
+static DEVICE_ATTR_RO(ts_source);
+
 static struct attribute *coresight_etmv4_attrs[] = {
 	&dev_attr_nr_pe_cmp.attr,
 	&dev_attr_nr_addr_cmp.attr,
@@ -2360,6 +2388,7 @@ static struct attribute *coresight_etmv4_attrs[] = {
 	&dev_attr_vmid_val.attr,
 	&dev_attr_vmid_masks.attr,
 	&dev_attr_cpu.attr,
+	&dev_attr_ts_source.attr,
 	NULL,
 };
 

drivers/hwtracing/coresight/coresight-priv.h

@@ -39,32 +39,37 @@
 
 #define ETM_MODE_EXCL_KERN	BIT(30)
 #define ETM_MODE_EXCL_USER	BIT(31)
+struct cs_pair_attribute {
+	struct device_attribute attr;
+	u32 lo_off;
+	u32 hi_off;
+};
+
+struct cs_off_attribute {
+	struct device_attribute attr;
+	u32 off;
+};
 
-typedef u32 (*coresight_read_fn)(const struct device *, u32 offset);
-#define __coresight_simple_func(type, func, name, lo_off, hi_off)	\
-static ssize_t name##_show(struct device *_dev,				\
-			   struct device_attribute *attr, char *buf)	\
-{									\
-	type *drvdata = dev_get_drvdata(_dev->parent);			\
-	coresight_read_fn fn = func;					\
-	u64 val;							\
-	pm_runtime_get_sync(_dev->parent);				\
-	if (fn)								\
-		val = (u64)fn(_dev->parent, lo_off);			\
-	else								\
-		val = coresight_read_reg_pair(drvdata->base,		\
-						 lo_off, hi_off);	\
-	pm_runtime_put_sync(_dev->parent);				\
-	return scnprintf(buf, PAGE_SIZE, "0x%llx\n", val);		\
-}									\
-static DEVICE_ATTR_RO(name)
-
-#define coresight_simple_func(type, func, name, offset)			\
-	__coresight_simple_func(type, func, name, offset, -1)
-#define coresight_simple_reg32(type, name, offset)			\
-	__coresight_simple_func(type, NULL, name, offset, -1)
-#define coresight_simple_reg64(type, name, lo_off, hi_off)		\
-	__coresight_simple_func(type, NULL, name, lo_off, hi_off)
+extern ssize_t coresight_simple_show32(struct device *_dev,
+				     struct device_attribute *attr, char *buf);
+extern ssize_t coresight_simple_show_pair(struct device *_dev,
+				     struct device_attribute *attr, char *buf);
+
+#define coresight_simple_reg32(name, offset)				\
+	(&((struct cs_off_attribute[]) {				\
+	   {								\
+		__ATTR(name, 0444, coresight_simple_show32, NULL),	\
+		offset							\
+	   }								\
+	})[0].attr.attr)
+
+#define coresight_simple_reg64(name, lo_off, hi_off)			\
+	(&((struct cs_pair_attribute[]) {				\
+	   {								\
+		__ATTR(name, 0444, coresight_simple_show_pair, NULL),	\
+		lo_off, hi_off						\
+	   }								\
+	})[0].attr.attr)
 
 extern const u32 coresight_barrier_pkt[4];
 #define CORESIGHT_BARRIER_PKT_SIZE (sizeof(coresight_barrier_pkt))
@@ -127,25 +132,6 @@ static inline void CS_UNLOCK(void __iomem *addr)
 	} while (0);
 }
 
-static inline u64
-coresight_read_reg_pair(void __iomem *addr, s32 lo_offset, s32 hi_offset)
-{
-	u64 val;
-
-	val = readl_relaxed(addr + lo_offset);
-	val |= (hi_offset < 0) ? 0 :
-	       (u64)readl_relaxed(addr + hi_offset) << 32;
-	return val;
-}
-
-static inline void coresight_write_reg_pair(void __iomem *addr, u64 val,
-						 s32 lo_offset, s32 hi_offset)
-{
-	writel_relaxed((u32)val, addr + lo_offset);
-	if (hi_offset >= 0)
-		writel_relaxed((u32)(val >> 32), addr + hi_offset);
-}
-
 void coresight_disable_path(struct list_head *path);
 int coresight_enable_path(struct list_head *path, u32 mode, void *sink_data);
 struct coresight_device *coresight_get_sink(struct list_head *path);

drivers/hwtracing/coresight/coresight-replicator.c

@@ -196,15 +196,9 @@ static const struct coresight_ops replicator_cs_ops = {
 	.link_ops	= &replicator_link_ops,
 };
 
-#define coresight_replicator_reg(name, offset) \
-	coresight_simple_reg32(struct replicator_drvdata, name, offset)
-
-coresight_replicator_reg(idfilter0, REPLICATOR_IDFILTER0);
-coresight_replicator_reg(idfilter1, REPLICATOR_IDFILTER1);
-
 static struct attribute *replicator_mgmt_attrs[] = {
-	&dev_attr_idfilter0.attr,
-	&dev_attr_idfilter1.attr,
+	coresight_simple_reg32(idfilter0, REPLICATOR_IDFILTER0),
+	coresight_simple_reg32(idfilter1, REPLICATOR_IDFILTER1),
 	NULL,
 };
 

drivers/hwtracing/coresight/coresight-stm.c

@@ -634,22 +634,6 @@ static ssize_t traceid_store(struct device *dev,
 }
 static DEVICE_ATTR_RW(traceid);
 
-#define coresight_stm_reg(name, offset)	\
-	coresight_simple_reg32(struct stm_drvdata, name, offset)
-
-coresight_stm_reg(tcsr, STMTCSR);
-coresight_stm_reg(tsfreqr, STMTSFREQR);
-coresight_stm_reg(syncr, STMSYNCR);
-coresight_stm_reg(sper, STMSPER);
-coresight_stm_reg(spter, STMSPTER);
-coresight_stm_reg(privmaskr, STMPRIVMASKR);
-coresight_stm_reg(spscr, STMSPSCR);
-coresight_stm_reg(spmscr, STMSPMSCR);
-coresight_stm_reg(spfeat1r, STMSPFEAT1R);
-coresight_stm_reg(spfeat2r, STMSPFEAT2R);
-coresight_stm_reg(spfeat3r, STMSPFEAT3R);
-coresight_stm_reg(devid, CORESIGHT_DEVID);
-
 static struct attribute *coresight_stm_attrs[] = {
 	&dev_attr_hwevent_enable.attr,
 	&dev_attr_hwevent_select.attr,
@@ -660,18 +644,18 @@ static struct attribute *coresight_stm_attrs[] = {
 };
 
 static struct attribute *coresight_stm_mgmt_attrs[] = {
-	&dev_attr_tcsr.attr,
-	&dev_attr_tsfreqr.attr,
-	&dev_attr_syncr.attr,
-	&dev_attr_sper.attr,
-	&dev_attr_spter.attr,
-	&dev_attr_privmaskr.attr,
-	&dev_attr_spscr.attr,
-	&dev_attr_spmscr.attr,
-	&dev_attr_spfeat1r.attr,
-	&dev_attr_spfeat2r.attr,
-	&dev_attr_spfeat3r.attr,
-	&dev_attr_devid.attr,
+	coresight_simple_reg32(tcsr, STMTCSR),
+	coresight_simple_reg32(tsfreqr, STMTSFREQR),
+	coresight_simple_reg32(syncr, STMSYNCR),
+	coresight_simple_reg32(sper, STMSPER),
+	coresight_simple_reg32(spter, STMSPTER),
+	coresight_simple_reg32(privmaskr, STMPRIVMASKR),
+	coresight_simple_reg32(spscr, STMSPSCR),
+	coresight_simple_reg32(spmscr, STMSPMSCR),
+	coresight_simple_reg32(spfeat1r, STMSPFEAT1R),
+	coresight_simple_reg32(spfeat2r, STMSPFEAT2R),
+	coresight_simple_reg32(spfeat3r, STMSPFEAT3R),
+	coresight_simple_reg32(devid, CORESIGHT_DEVID),
 	NULL,
 };
 

drivers/hwtracing/coresight/coresight-tmc-core.c

@@ -251,41 +251,21 @@ static enum tmc_mem_intf_width tmc_get_memwidth(u32 devid)
 	return memwidth;
 }
 
-#define coresight_tmc_reg(name, offset)			\
-	coresight_simple_reg32(struct tmc_drvdata, name, offset)
-#define coresight_tmc_reg64(name, lo_off, hi_off)	\
-	coresight_simple_reg64(struct tmc_drvdata, name, lo_off, hi_off)
-
-coresight_tmc_reg(rsz, TMC_RSZ);
-coresight_tmc_reg(sts, TMC_STS);
-coresight_tmc_reg(trg, TMC_TRG);
-coresight_tmc_reg(ctl, TMC_CTL);
-coresight_tmc_reg(ffsr, TMC_FFSR);
-coresight_tmc_reg(ffcr, TMC_FFCR);
-coresight_tmc_reg(mode, TMC_MODE);
-coresight_tmc_reg(pscr, TMC_PSCR);
-coresight_tmc_reg(axictl, TMC_AXICTL);
-coresight_tmc_reg(authstatus, TMC_AUTHSTATUS);
-coresight_tmc_reg(devid, CORESIGHT_DEVID);
-coresight_tmc_reg64(rrp, TMC_RRP, TMC_RRPHI);
-coresight_tmc_reg64(rwp, TMC_RWP, TMC_RWPHI);
-coresight_tmc_reg64(dba, TMC_DBALO, TMC_DBAHI);
-
 static struct attribute *coresight_tmc_mgmt_attrs[] = {
-	&dev_attr_rsz.attr,
-	&dev_attr_sts.attr,
-	&dev_attr_rrp.attr,
-	&dev_attr_rwp.attr,
-	&dev_attr_trg.attr,
-	&dev_attr_ctl.attr,
-	&dev_attr_ffsr.attr,
-	&dev_attr_ffcr.attr,
-	&dev_attr_mode.attr,
-	&dev_attr_pscr.attr,
-	&dev_attr_devid.attr,
-	&dev_attr_dba.attr,
-	&dev_attr_axictl.attr,
-	&dev_attr_authstatus.attr,
+	coresight_simple_reg32(rsz, TMC_RSZ),
+	coresight_simple_reg32(sts, TMC_STS),
+	coresight_simple_reg64(rrp, TMC_RRP, TMC_RRPHI),
+	coresight_simple_reg64(rwp, TMC_RWP, TMC_RWPHI),
+	coresight_simple_reg32(trg, TMC_TRG),
+	coresight_simple_reg32(ctl, TMC_CTL),
+	coresight_simple_reg32(ffsr, TMC_FFSR),
+	coresight_simple_reg32(ffcr, TMC_FFCR),
+	coresight_simple_reg32(mode, TMC_MODE),
+	coresight_simple_reg32(pscr, TMC_PSCR),
+	coresight_simple_reg32(devid, CORESIGHT_DEVID),
+	coresight_simple_reg64(dba, TMC_DBALO, TMC_DBAHI),
+	coresight_simple_reg32(axictl, TMC_AXICTL),
+	coresight_simple_reg32(authstatus, TMC_AUTHSTATUS),
 	NULL,
 };
 

drivers/hwtracing/coresight/coresight-tmc.h

@@ -282,12 +282,12 @@ ssize_t tmc_etr_get_sysfs_trace(struct tmc_drvdata *drvdata,
 static inline u64							\
 tmc_read_##name(struct tmc_drvdata *drvdata)				\
 {									\
-	return coresight_read_reg_pair(drvdata->base, lo_off, hi_off);	\
+	return csdev_access_relaxed_read_pair(&drvdata->csdev->access, lo_off, hi_off); \
 }									\
 static inline void							\
 tmc_write_##name(struct tmc_drvdata *drvdata, u64 val)			\
 {									\
-	coresight_write_reg_pair(drvdata->base, val, lo_off, hi_off);	\
+	csdev_access_relaxed_write_pair(&drvdata->csdev->access, val, lo_off, hi_off); \
 }
 
 TMC_REG_PAIR(rrp, TMC_RRP, TMC_RRPHI)

drivers/hwtracing/ptt/Kconfig

+# SPDX-License-Identifier: GPL-2.0-only
+config HISI_PTT
+	tristate "HiSilicon PCIe Tune and Trace Device"
+	depends on ARM64 || (COMPILE_TEST && 64BIT)
+	depends on PCI && HAS_DMA && HAS_IOMEM && PERF_EVENTS
+	help
+	  HiSilicon PCIe Tune and Trace device exists as a PCIe RCiEP
+	  device, and it provides support for PCIe traffic tuning and
+	  tracing TLP headers to the memory.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called hisi_ptt.

drivers/hwtracing/ptt/Makefile

+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_HISI_PTT) += hisi_ptt.o

drivers/hwtracing/ptt/hisi_ptt.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Driver for HiSilicon PCIe tune and trace device
+ *
+ * Copyright (c) 2022 HiSilicon Technologies Co., Ltd.
+ * Author: Yicong Yang <yangyicong@hisilicon.com>
+ */
+
+#ifndef _HISI_PTT_H
+#define _HISI_PTT_H
+
+#include <linux/bits.h>
+#include <linux/cpumask.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/pci.h>
+#include <linux/perf_event.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#define DRV_NAME "hisi_ptt"
+
+/*
+ * The definition of the device registers and register fields.
+ */
+#define HISI_PTT_TUNING_CTRL		0x0000
+#define   HISI_PTT_TUNING_CTRL_CODE	GENMASK(15, 0)
+#define   HISI_PTT_TUNING_CTRL_SUB	GENMASK(23, 16)
+#define HISI_PTT_TUNING_DATA		0x0004
+#define   HISI_PTT_TUNING_DATA_VAL_MASK	GENMASK(15, 0)
+#define HISI_PTT_TRACE_ADDR_SIZE	0x0800
+#define HISI_PTT_TRACE_ADDR_BASE_LO_0	0x0810
+#define HISI_PTT_TRACE_ADDR_BASE_HI_0	0x0814
+#define HISI_PTT_TRACE_ADDR_STRIDE	0x8
+#define HISI_PTT_TRACE_CTRL		0x0850
+#define   HISI_PTT_TRACE_CTRL_EN	BIT(0)
+#define   HISI_PTT_TRACE_CTRL_RST	BIT(1)
+#define   HISI_PTT_TRACE_CTRL_RXTX_SEL	GENMASK(3, 2)
+#define   HISI_PTT_TRACE_CTRL_TYPE_SEL	GENMASK(7, 4)
+#define   HISI_PTT_TRACE_CTRL_DATA_FORMAT	BIT(14)
+#define   HISI_PTT_TRACE_CTRL_FILTER_MODE	BIT(15)
+#define   HISI_PTT_TRACE_CTRL_TARGET_SEL	GENMASK(31, 16)
+#define HISI_PTT_TRACE_INT_STAT		0x0890
+#define   HISI_PTT_TRACE_INT_STAT_MASK	GENMASK(3, 0)
+#define HISI_PTT_TRACE_INT_MASK		0x0894
+#define HISI_PTT_TUNING_INT_STAT	0x0898
+#define   HISI_PTT_TUNING_INT_STAT_MASK	BIT(0)
+#define HISI_PTT_TRACE_WR_STS		0x08a0
+#define   HISI_PTT_TRACE_WR_STS_WRITE	GENMASK(27, 0)
+#define   HISI_PTT_TRACE_WR_STS_BUFFER	GENMASK(29, 28)
+#define HISI_PTT_TRACE_STS		0x08b0
+#define   HISI_PTT_TRACE_IDLE		BIT(0)
+#define HISI_PTT_DEVICE_RANGE		0x0fe0
+#define   HISI_PTT_DEVICE_RANGE_UPPER	GENMASK(31, 16)
+#define   HISI_PTT_DEVICE_RANGE_LOWER	GENMASK(15, 0)
+#define HISI_PTT_LOCATION		0x0fe8
+#define   HISI_PTT_CORE_ID		GENMASK(15, 0)
+#define   HISI_PTT_SICL_ID		GENMASK(31, 16)
+
+/* Parameters of PTT trace DMA part. */
+#define HISI_PTT_TRACE_DMA_IRQ			0
+#define HISI_PTT_TRACE_BUF_CNT			4
+#define HISI_PTT_TRACE_BUF_SIZE			SZ_4M
+#define HISI_PTT_TRACE_TOTAL_BUF_SIZE		(HISI_PTT_TRACE_BUF_SIZE * \
+						 HISI_PTT_TRACE_BUF_CNT)
+/* Wait time for hardware DMA to reset */
+#define HISI_PTT_RESET_TIMEOUT_US	10UL
+#define HISI_PTT_RESET_POLL_INTERVAL_US	1UL
+/* Poll timeout and interval for waiting hardware work to finish */
+#define HISI_PTT_WAIT_TUNE_TIMEOUT_US	1000000UL
+#define HISI_PTT_WAIT_TRACE_TIMEOUT_US	100UL
+#define HISI_PTT_WAIT_POLL_INTERVAL_US	10UL
+
+#define HISI_PCIE_CORE_PORT_ID(devfn)	((PCI_SLOT(devfn) & 0x7) << 1)
+
+/* Definition of the PMU configs */
+#define HISI_PTT_PMU_FILTER_IS_PORT	BIT(19)
+#define HISI_PTT_PMU_FILTER_VAL_MASK	GENMASK(15, 0)
+#define HISI_PTT_PMU_DIRECTION_MASK	GENMASK(23, 20)
+#define HISI_PTT_PMU_TYPE_MASK		GENMASK(31, 24)
+#define HISI_PTT_PMU_FORMAT_MASK	GENMASK(35, 32)
+
+/**
+ * struct hisi_ptt_tune_desc - Describe tune event for PTT tune
+ * @hisi_ptt:   PTT device this tune event belongs to
+ * @name:       name of this event
+ * @event_code: code of the event
+ */
+struct hisi_ptt_tune_desc {
+	struct hisi_ptt *hisi_ptt;
+	const char *name;
+	u32 event_code;
+};
+
+/**
+ * struct hisi_ptt_dma_buffer - Describe a single trace buffer of PTT trace.
+ *                              The detail of the data format is described
+ *                              in the documentation of PTT device.
+ * @dma:   DMA address of this buffer visible to the device
+ * @addr:  virtual address of this buffer visible to the cpu
+ */
+struct hisi_ptt_dma_buffer {
+	dma_addr_t dma;
+	void *addr;
+};
+
+/**
+ * struct hisi_ptt_trace_ctrl - Control and status of PTT trace
+ * @trace_buf: array of the trace buffers for holding the trace data.
+ *             the length will be HISI_PTT_TRACE_BUF_CNT.
+ * @handle:    perf output handle of current trace session
+ * @buf_index: the index of current using trace buffer
+ * @on_cpu:    current tracing cpu
+ * @started:   current trace status, true for started
+ * @is_port:   whether we're tracing root port or not
+ * @direction: direction of the TLP headers to trace
+ * @filter:    filter value for tracing the TLP headers
+ * @format:    format of the TLP headers to trace
+ * @type:      type of the TLP headers to trace
+ */
+struct hisi_ptt_trace_ctrl {
+	struct hisi_ptt_dma_buffer *trace_buf;
+	struct perf_output_handle handle;
+	u32 buf_index;
+	int on_cpu;
+	bool started;
+	bool is_port;
+	u32 direction:2;
+	u32 filter:16;
+	u32 format:1;
+	u32 type:4;
+};
+
+/**
+ * struct hisi_ptt_filter_desc - Descriptor of the PTT trace filter
+ * @list:    entry of this descriptor in the filter list
+ * @is_port: the PCI device of the filter is a Root Port or not
+ * @devid:   the PCI device's devid of the filter
+ */
+struct hisi_ptt_filter_desc {
+	struct list_head list;
+	bool is_port;
+	u16 devid;
+};
+
+/**
+ * struct hisi_ptt_pmu_buf - Descriptor of the AUX buffer of PTT trace
+ * @length:   size of the AUX buffer
+ * @nr_pages: number of pages of the AUX buffer
+ * @base:     start address of AUX buffer
+ * @pos:      position in the AUX buffer to commit traced data
+ */
+struct hisi_ptt_pmu_buf {
+	size_t length;
+	int nr_pages;
+	void *base;
+	long pos;
+};
+
+/**
+ * struct hisi_ptt - Per PTT device data
+ * @trace_ctrl:   the control information of PTT trace
+ * @hotplug_node: node for register cpu hotplug event
+ * @hisi_ptt_pmu: the pum device of trace
+ * @iobase:       base IO address of the device
+ * @pdev:         pci_dev of this PTT device
+ * @tune_lock:    lock to serialize the tune process
+ * @pmu_lock:     lock to serialize the perf process
+ * @upper_bdf:    the upper BDF range of the PCI devices managed by this PTT device
+ * @lower_bdf:    the lower BDF range of the PCI devices managed by this PTT device
+ * @port_filters: the filter list of root ports
+ * @req_filters:  the filter list of requester ID
+ * @port_mask:    port mask of the managed root ports
+ */
+struct hisi_ptt {
+	struct hisi_ptt_trace_ctrl trace_ctrl;
+	struct hlist_node hotplug_node;
+	struct pmu hisi_ptt_pmu;
+	void __iomem *iobase;
+	struct pci_dev *pdev;
+	struct mutex tune_lock;
+	spinlock_t pmu_lock;
+	u32 upper_bdf;
+	u32 lower_bdf;
+
+	/*
+	 * The trace TLP headers can either be filtered by certain
+	 * root port, or by the requester ID. Organize the filters
+	 * by @port_filters and @req_filters here. The mask of all
+	 * the valid ports is also cached for doing sanity check
+	 * of user input.
+	 */
+	struct list_head port_filters;
+	struct list_head req_filters;
+	u16 port_mask;
+};
+
+#define to_hisi_ptt(pmu) container_of(pmu, struct hisi_ptt, hisi_ptt_pmu)
+
+#endif /* _HISI_PTT_H */

drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

@@ -2817,6 +2817,26 @@ static int arm_smmu_dev_disable_feature(struct device *dev,
 	}
 }
 
+/*
+ * HiSilicon PCIe tune and trace device can be used to trace TLP headers on the
+ * PCIe link and save the data to memory by DMA. The hardware is restricted to
+ * use identity mapping only.
+ */
+#define IS_HISI_PTT_DEVICE(pdev)	((pdev)->vendor == PCI_VENDOR_ID_HUAWEI && \
+					 (pdev)->device == 0xa12e)
+
+static int arm_smmu_def_domain_type(struct device *dev)
+{
+	if (dev_is_pci(dev)) {
+		struct pci_dev *pdev = to_pci_dev(dev);
+
+		if (IS_HISI_PTT_DEVICE(pdev))
+			return IOMMU_DOMAIN_IDENTITY;
+	}
+
+	return 0;
+}
+
 static struct iommu_ops arm_smmu_ops = {
 	.capable		= arm_smmu_capable,
 	.domain_alloc		= arm_smmu_domain_alloc,
@@ -2831,6 +2851,7 @@ static struct iommu_ops arm_smmu_ops = {
 	.sva_unbind		= arm_smmu_sva_unbind,
 	.sva_get_pasid		= arm_smmu_sva_get_pasid,
 	.page_response		= arm_smmu_page_response,
+	.def_domain_type	= arm_smmu_def_domain_type,
 	.pgsize_bitmap		= -1UL, /* Restricted during device attach */
 	.owner			= THIS_MODULE,
 	.default_domain_ops = &(const struct iommu_domain_ops) {

include/linux/coresight.h

@@ -372,6 +372,29 @@ static inline u32 csdev_access_relaxed_read32(struct csdev_access *csa,
 	return csa->read(offset, true, false);
 }
 
+static inline u64 csdev_access_relaxed_read_pair(struct csdev_access *csa,
+						 u32 lo_offset, u32 hi_offset)
+{
+	if (likely(csa->io_mem)) {
+		return readl_relaxed(csa->base + lo_offset) |
+			((u64)readl_relaxed(csa->base + hi_offset) << 32);
+	}
+
+	return csa->read(lo_offset, true, false) | (csa->read(hi_offset, true, false) << 32);
+}
+
+static inline void csdev_access_relaxed_write_pair(struct csdev_access *csa, u64 val,
+						   u32 lo_offset, u32 hi_offset)
+{
+	if (likely(csa->io_mem)) {
+		writel_relaxed((u32)val, csa->base + lo_offset);
+		writel_relaxed((u32)(val >> 32), csa->base + hi_offset);
+	} else {
+		csa->write((u32)val, lo_offset, true, false);
+		csa->write((u32)(val >> 32), hi_offset, true, false);
+	}
+}
+
 static inline u32 csdev_access_read32(struct csdev_access *csa, u32 offset)
 {
 	if (likely(csa->io_mem))