Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 338 insertions, 0 deletions

diff --git a/drivers/hwtracing/coresight/coresight-tmc.h b/drivers/hwtracing/coresight/coresight-tmc.h
new file mode 100644
index 000000000..0ee48c5ba
--- /dev/null
+++ b/drivers/hwtracing/coresight/coresight-tmc.h
@@ -0,0 +1,338 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright(C) 2015 Linaro Limited. All rights reserved.
+ * Author: Mathieu Poirier <mathieu.poirier@linaro.org>
+ */
+
+#ifndef _CORESIGHT_TMC_H
+#define _CORESIGHT_TMC_H
+
+#include <linux/dma-mapping.h>
+#include <linux/idr.h>
+#include <linux/miscdevice.h>
+#include <linux/mutex.h>
+#include <linux/refcount.h>
+
+#define TMC_RSZ			0x004
+#define TMC_STS			0x00c
+#define TMC_RRD			0x010
+#define TMC_RRP			0x014
+#define TMC_RWP			0x018
+#define TMC_TRG			0x01c
+#define TMC_CTL			0x020
+#define TMC_RWD			0x024
+#define TMC_MODE		0x028
+#define TMC_LBUFLEVEL		0x02c
+#define TMC_CBUFLEVEL		0x030
+#define TMC_BUFWM		0x034
+#define TMC_RRPHI		0x038
+#define TMC_RWPHI		0x03c
+#define TMC_AXICTL		0x110
+#define TMC_DBALO		0x118
+#define TMC_DBAHI		0x11c
+#define TMC_FFSR		0x300
+#define TMC_FFCR		0x304
+#define TMC_PSCR		0x308
+#define TMC_ITMISCOP0		0xee0
+#define TMC_ITTRFLIN		0xee8
+#define TMC_ITATBDATA0		0xeec
+#define TMC_ITATBCTR2		0xef0
+#define TMC_ITATBCTR1		0xef4
+#define TMC_ITATBCTR0		0xef8
+#define TMC_AUTHSTATUS		0xfb8
+
+/* register description */
+/* TMC_CTL - 0x020 */
+#define TMC_CTL_CAPT_EN		BIT(0)
+/* TMC_STS - 0x00C */
+#define TMC_STS_TMCREADY_BIT	2
+#define TMC_STS_FULL		BIT(0)
+#define TMC_STS_TRIGGERED	BIT(1)
+#define TMC_STS_MEMERR		BIT(5)
+/*
+ * TMC_AXICTL - 0x110
+ *
+ * TMC AXICTL format for SoC-400
+ *	Bits [0-1]	: ProtCtrlBit0-1
+ *	Bits [2-5]	: CacheCtrlBits 0-3 (AXCACHE)
+ *	Bit  6		: Reserved
+ *	Bit  7		: ScatterGatherMode
+ *	Bits [8-11]	: WrBurstLen
+ *	Bits [12-31]	: Reserved.
+ * TMC AXICTL format for SoC-600, as above except:
+ *	Bits [2-5]	: AXI WCACHE
+ *	Bits [16-19]	: AXI RCACHE
+ *	Bits [20-31]	: Reserved
+ */
+#define TMC_AXICTL_CLEAR_MASK 0xfbf
+#define TMC_AXICTL_ARCACHE_MASK (0xf << 16)
+
+#define TMC_AXICTL_PROT_CTL_B0	BIT(0)
+#define TMC_AXICTL_PROT_CTL_B1	BIT(1)
+#define TMC_AXICTL_SCT_GAT_MODE	BIT(7)
+#define TMC_AXICTL_WR_BURST(v)	(((v) & 0xf) << 8)
+#define TMC_AXICTL_WR_BURST_16	0xf
+/* Write-back Read and Write-allocate */
+#define TMC_AXICTL_AXCACHE_OS	(0xf << 2)
+#define TMC_AXICTL_ARCACHE_OS	(0xf << 16)
+
+/* TMC_FFCR - 0x304 */
+#define TMC_FFCR_FLUSHMAN_BIT	6
+#define TMC_FFCR_EN_FMT		BIT(0)
+#define TMC_FFCR_EN_TI		BIT(1)
+#define TMC_FFCR_FON_FLIN	BIT(4)
+#define TMC_FFCR_FON_TRIG_EVT	BIT(5)
+#define TMC_FFCR_TRIGON_TRIGIN	BIT(8)
+#define TMC_FFCR_STOP_ON_FLUSH	BIT(12)
+
+
+#define TMC_DEVID_NOSCAT	BIT(24)
+
+#define TMC_DEVID_AXIAW_VALID	BIT(16)
+#define TMC_DEVID_AXIAW_SHIFT	17
+#define TMC_DEVID_AXIAW_MASK	0x7f
+
+#define TMC_AUTH_NSID_MASK	GENMASK(1, 0)
+
+enum tmc_config_type {
+	TMC_CONFIG_TYPE_ETB,
+	TMC_CONFIG_TYPE_ETR,
+	TMC_CONFIG_TYPE_ETF,
+};
+
+enum tmc_mode {
+	TMC_MODE_CIRCULAR_BUFFER,
+	TMC_MODE_SOFTWARE_FIFO,
+	TMC_MODE_HARDWARE_FIFO,
+};
+
+enum tmc_mem_intf_width {
+	TMC_MEM_INTF_WIDTH_32BITS	= 1,
+	TMC_MEM_INTF_WIDTH_64BITS	= 2,
+	TMC_MEM_INTF_WIDTH_128BITS	= 4,
+	TMC_MEM_INTF_WIDTH_256BITS	= 8,
+};
+
+/* TMC ETR Capability bit definitions */
+#define TMC_ETR_SG			(0x1U << 0)
+/* ETR has separate read/write cache encodings */
+#define TMC_ETR_AXI_ARCACHE		(0x1U << 1)
+/*
+ * TMC_ETR_SAVE_RESTORE - Values of RRP/RWP/STS.Full are
+ * retained when TMC leaves Disabled state, allowing us to continue
+ * the tracing from a point where we stopped. This also implies that
+ * the RRP/RWP/STS.Full should always be programmed to the correct
+ * value. Unfortunately this is not advertised by the hardware,
+ * so we have to rely on PID of the IP to detect the functionality.
+ */
+#define TMC_ETR_SAVE_RESTORE		(0x1U << 2)
+
+/* Coresight SoC-600 TMC-ETR unadvertised capabilities */
+#define CORESIGHT_SOC_600_ETR_CAPS	\
+	(TMC_ETR_SAVE_RESTORE | TMC_ETR_AXI_ARCACHE)
+
+enum etr_mode {
+	ETR_MODE_FLAT,		/* Uses contiguous flat buffer */
+	ETR_MODE_ETR_SG,	/* Uses in-built TMC ETR SG mechanism */
+	ETR_MODE_CATU,		/* Use SG mechanism in CATU */
+};
+
+struct etr_buf_operations;
+
+/**
+ * struct etr_buf - Details of the buffer used by ETR
+ * refcount	; Number of sources currently using this etr_buf.
+ * @mode	: Mode of the ETR buffer, contiguous, Scatter Gather etc.
+ * @full	: Trace data overflow
+ * @size	: Size of the buffer.
+ * @hwaddr	: Address to be programmed in the TMC:DBA{LO,HI}
+ * @offset	: Offset of the trace data in the buffer for consumption.
+ * @len		: Available trace data @buf (may round up to the beginning).
+ * @ops		: ETR buffer operations for the mode.
+ * @private	: Backend specific information for the buf
+ */
+struct etr_buf {
+	refcount_t			refcount;
+	enum etr_mode			mode;
+	bool				full;
+	ssize_t				size;
+	dma_addr_t			hwaddr;
+	unsigned long			offset;
+	s64				len;
+	const struct etr_buf_operations	*ops;
+	void				*private;
+};
+
+/**
+ * struct tmc_drvdata - specifics associated to an TMC component
+ * @base:	memory mapped base address for this component.
+ * @csdev:	component vitals needed by the framework.
+ * @miscdev:	specifics to handle "/dev/xyz.tmc" entry.
+ * @spinlock:	only one at a time pls.
+ * @pid:	Process ID of the process being monitored by the session
+ *		that is using this component.
+ * @buf:	Snapshot of the trace data for ETF/ETB.
+ * @etr_buf:	details of buffer used in TMC-ETR
+ * @len:	size of the available trace for ETF/ETB.
+ * @size:	trace buffer size for this TMC (common for all modes).
+ * @max_burst_size: The maximum burst size that can be initiated by
+ *		TMC-ETR on AXI bus.
+ * @mode:	how this TMC is being used.
+ * @config_type: TMC variant, must be of type @tmc_config_type.
+ * @memwidth:	width of the memory interface databus, in bytes.
+ * @trigger_cntr: amount of words to store after a trigger.
+ * @etr_caps:	Bitmask of capabilities of the TMC ETR, inferred from the
+ *		device configuration register (DEVID)
+ * @idr:	Holds etr_bufs allocated for this ETR.
+ * @idr_mutex:	Access serialisation for idr.
+ * @sysfs_buf:	SYSFS buffer for ETR.
+ * @perf_buf:	PERF buffer for ETR.
+ */
+struct tmc_drvdata {
+	void __iomem		*base;
+	struct coresight_device	*csdev;
+	struct miscdevice	miscdev;
+	spinlock_t		spinlock;
+	pid_t			pid;
+	bool			reading;
+	union {
+		char		*buf;		/* TMC ETB */
+		struct etr_buf	*etr_buf;	/* TMC ETR */
+	};
+	u32			len;
+	u32			size;
+	u32			max_burst_size;
+	u32			mode;
+	enum tmc_config_type	config_type;
+	enum tmc_mem_intf_width	memwidth;
+	u32			trigger_cntr;
+	u32			etr_caps;
+	struct idr		idr;
+	struct mutex		idr_mutex;
+	struct etr_buf		*sysfs_buf;
+	struct etr_buf		*perf_buf;
+};
+
+struct etr_buf_operations {
+	int (*alloc)(struct tmc_drvdata *drvdata, struct etr_buf *etr_buf,
+		     int node, void **pages);
+	void (*sync)(struct etr_buf *etr_buf, u64 rrp, u64 rwp);
+	ssize_t (*get_data)(struct etr_buf *etr_buf, u64 offset, size_t len,
+			    char **bufpp);
+	void (*free)(struct etr_buf *etr_buf);
+};
+
+/**
+ * struct tmc_pages - Collection of pages used for SG.
+ * @nr_pages:		Number of pages in the list.
+ * @daddrs:		Array of DMA'able page address.
+ * @pages:		Array pages for the buffer.
+ */
+struct tmc_pages {
+	int nr_pages;
+	dma_addr_t	*daddrs;
+	struct page	**pages;
+};
+
+/*
+ * struct tmc_sg_table - Generic SG table for TMC
+ * @dev:		Device for DMA allocations
+ * @table_vaddr:	Contiguous Virtual address for PageTable
+ * @data_vaddr:		Contiguous Virtual address for Data Buffer
+ * @table_daddr:	DMA address of the PageTable base
+ * @node:		Node for Page allocations
+ * @table_pages:	List of pages & dma address for Table
+ * @data_pages:		List of pages & dma address for Data
+ */
+struct tmc_sg_table {
+	struct device *dev;
+	void *table_vaddr;
+	void *data_vaddr;
+	dma_addr_t table_daddr;
+	int node;
+	struct tmc_pages table_pages;
+	struct tmc_pages data_pages;
+};
+
+/* Generic functions */
+int tmc_wait_for_tmcready(struct tmc_drvdata *drvdata);
+void tmc_flush_and_stop(struct tmc_drvdata *drvdata);
+void tmc_enable_hw(struct tmc_drvdata *drvdata);
+void tmc_disable_hw(struct tmc_drvdata *drvdata);
+u32 tmc_get_memwidth_mask(struct tmc_drvdata *drvdata);
+
+/* ETB/ETF functions */
+int tmc_read_prepare_etb(struct tmc_drvdata *drvdata);
+int tmc_read_unprepare_etb(struct tmc_drvdata *drvdata);
+extern const struct coresight_ops tmc_etb_cs_ops;
+extern const struct coresight_ops tmc_etf_cs_ops;
+
+ssize_t tmc_etb_get_sysfs_trace(struct tmc_drvdata *drvdata,
+				loff_t pos, size_t len, char **bufpp);
+/* ETR functions */
+int tmc_read_prepare_etr(struct tmc_drvdata *drvdata);
+int tmc_read_unprepare_etr(struct tmc_drvdata *drvdata);
+void tmc_etr_disable_hw(struct tmc_drvdata *drvdata);
+extern const struct coresight_ops tmc_etr_cs_ops;
+ssize_t tmc_etr_get_sysfs_trace(struct tmc_drvdata *drvdata,
+				loff_t pos, size_t len, char **bufpp);
+
+
+#define TMC_REG_PAIR(name, lo_off, hi_off)				\
+static inline u64							\
+tmc_read_##name(struct tmc_drvdata *drvdata)				\
+{									\
+	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)			\
+{									\
+	csdev_access_relaxed_write_pair(&drvdata->csdev->access, val, lo_off, hi_off); \
+}
+
+TMC_REG_PAIR(rrp, TMC_RRP, TMC_RRPHI)
+TMC_REG_PAIR(rwp, TMC_RWP, TMC_RWPHI)
+TMC_REG_PAIR(dba, TMC_DBALO, TMC_DBAHI)
+
+/* Initialise the caps from unadvertised static capabilities of the device */
+static inline void tmc_etr_init_caps(struct tmc_drvdata *drvdata, u32 dev_caps)
+{
+	WARN_ON(drvdata->etr_caps);
+	drvdata->etr_caps = dev_caps;
+}
+
+static inline void tmc_etr_set_cap(struct tmc_drvdata *drvdata, u32 cap)
+{
+	drvdata->etr_caps |= cap;
+}
+
+static inline bool tmc_etr_has_cap(struct tmc_drvdata *drvdata, u32 cap)
+{
+	return !!(drvdata->etr_caps & cap);
+}
+
+struct tmc_sg_table *tmc_alloc_sg_table(struct device *dev,
+					int node,
+					int nr_tpages,
+					int nr_dpages,
+					void **pages);
+void tmc_free_sg_table(struct tmc_sg_table *sg_table);
+void tmc_sg_table_sync_table(struct tmc_sg_table *sg_table);
+void tmc_sg_table_sync_data_range(struct tmc_sg_table *table,
+				  u64 offset, u64 size);
+ssize_t tmc_sg_table_get_data(struct tmc_sg_table *sg_table,
+			      u64 offset, size_t len, char **bufpp);
+static inline unsigned long
+tmc_sg_table_buf_size(struct tmc_sg_table *sg_table)
+{
+	return (unsigned long)sg_table->data_pages.nr_pages << PAGE_SHIFT;
+}
+
+struct coresight_device *tmc_etr_get_catu_device(struct tmc_drvdata *drvdata);
+
+void tmc_etr_set_catu_ops(const struct etr_buf_operations *catu);
+void tmc_etr_remove_catu_ops(void);
+struct etr_buf *tmc_etr_get_buffer(struct coresight_device *csdev,
+				   enum cs_mode mode, void *data);
+
+#endif