| /* 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 |
| |
| /* 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) |
| /* |
| * 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_16 0xF00 |
| /* 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 |
| |
| 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. |
| * @dev: the device entity associated to 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). |
| * @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. |
| * @perf_data: PERF buffer for ETR. |
| * @sysfs_data: SYSFS buffer for ETR. |
| */ |
| struct tmc_drvdata { |
| void __iomem *base; |
| struct device *dev; |
| 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 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; |
| void *perf_data; |
| }; |
| |
| 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 */ |
| void 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); |
| |
| /* 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); |
| 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 coresight_read_reg_pair(drvdata->base, 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); \ |
| } |
| |
| 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 sg_table->data_pages.nr_pages << PAGE_SHIFT; |
| } |
| |
| struct coresight_device *tmc_etr_get_catu_device(struct tmc_drvdata *drvdata); |
| |
| #endif |