1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2011-2012, The Linux Foundation. All rights reserved. 4 */ 5 6 #ifndef _CORESIGHT_PRIV_H 7 #define _CORESIGHT_PRIV_H 8 9 #include <linux/amba/bus.h> 10 #include <linux/bitops.h> 11 #include <linux/io.h> 12 #include <linux/coresight.h> 13 #include <linux/pm_runtime.h> 14 15 /* 16 * Coresight management registers (0xf00-0xfcc) 17 * 0xfa0 - 0xfa4: Management registers in PFTv1.0 18 * Trace registers in PFTv1.1 19 */ 20 #define CORESIGHT_ITCTRL 0xf00 21 #define CORESIGHT_CLAIMSET 0xfa0 22 #define CORESIGHT_CLAIMCLR 0xfa4 23 #define CORESIGHT_LAR 0xfb0 24 #define CORESIGHT_LSR 0xfb4 25 #define CORESIGHT_DEVARCH 0xfbc 26 #define CORESIGHT_AUTHSTATUS 0xfb8 27 #define CORESIGHT_DEVID 0xfc8 28 #define CORESIGHT_DEVTYPE 0xfcc 29 30 31 /* 32 * Coresight device CLAIM protocol. 33 * See PSCI - ARM DEN 0022D, Section: 6.8.1 Debug and Trace save and restore. 34 */ 35 #define CORESIGHT_CLAIM_SELF_HOSTED BIT(1) 36 37 #define TIMEOUT_US 100 38 #define BMVAL(val, lsb, msb) ((val & GENMASK(msb, lsb)) >> lsb) 39 40 #define ETM_MODE_EXCL_KERN BIT(30) 41 #define ETM_MODE_EXCL_USER BIT(31) 42 struct cs_pair_attribute { 43 struct device_attribute attr; 44 u32 lo_off; 45 u32 hi_off; 46 }; 47 48 struct cs_off_attribute { 49 struct device_attribute attr; 50 u32 off; 51 }; 52 53 extern ssize_t coresight_simple_show32(struct device *_dev, 54 struct device_attribute *attr, char *buf); 55 extern ssize_t coresight_simple_show_pair(struct device *_dev, 56 struct device_attribute *attr, char *buf); 57 58 #define coresight_simple_reg32(name, offset) \ 59 (&((struct cs_off_attribute[]) { \ 60 { \ 61 __ATTR(name, 0444, coresight_simple_show32, NULL), \ 62 offset \ 63 } \ 64 })[0].attr.attr) 65 66 #define coresight_simple_reg64(name, lo_off, hi_off) \ 67 (&((struct cs_pair_attribute[]) { \ 68 { \ 69 __ATTR(name, 0444, coresight_simple_show_pair, NULL), \ 70 lo_off, hi_off \ 71 } \ 72 })[0].attr.attr) 73 74 extern const u32 coresight_barrier_pkt[4]; 75 #define CORESIGHT_BARRIER_PKT_SIZE (sizeof(coresight_barrier_pkt)) 76 77 enum etm_addr_type { 78 ETM_ADDR_TYPE_NONE, 79 ETM_ADDR_TYPE_SINGLE, 80 ETM_ADDR_TYPE_RANGE, 81 ETM_ADDR_TYPE_START, 82 ETM_ADDR_TYPE_STOP, 83 }; 84 85 enum cs_mode { 86 CS_MODE_DISABLED, 87 CS_MODE_SYSFS, 88 CS_MODE_PERF, 89 }; 90 91 /** 92 * struct cs_buffer - keep track of a recording session' specifics 93 * @cur: index of the current buffer 94 * @nr_pages: max number of pages granted to us 95 * @pid: PID this cs_buffer belongs to 96 * @offset: offset within the current buffer 97 * @data_size: how much we collected in this run 98 * @snapshot: is this run in snapshot mode 99 * @data_pages: a handle the ring buffer 100 */ 101 struct cs_buffers { 102 unsigned int cur; 103 unsigned int nr_pages; 104 pid_t pid; 105 unsigned long offset; 106 local_t data_size; 107 bool snapshot; 108 void **data_pages; 109 }; 110 111 static inline void coresight_insert_barrier_packet(void *buf) 112 { 113 if (buf) 114 memcpy(buf, coresight_barrier_pkt, CORESIGHT_BARRIER_PKT_SIZE); 115 } 116 117 static inline void CS_LOCK(void __iomem *addr) 118 { 119 do { 120 /* Wait for things to settle */ 121 mb(); 122 writel_relaxed(0x0, addr + CORESIGHT_LAR); 123 } while (0); 124 } 125 126 static inline void CS_UNLOCK(void __iomem *addr) 127 { 128 do { 129 writel_relaxed(CORESIGHT_UNLOCK, addr + CORESIGHT_LAR); 130 /* Make sure everyone has seen this */ 131 mb(); 132 } while (0); 133 } 134 135 void coresight_disable_path(struct list_head *path); 136 int coresight_enable_path(struct list_head *path, u32 mode, void *sink_data); 137 struct coresight_device *coresight_get_sink(struct list_head *path); 138 struct coresight_device * 139 coresight_get_enabled_sink(struct coresight_device *source); 140 struct coresight_device *coresight_get_sink_by_id(u32 id); 141 struct coresight_device * 142 coresight_find_default_sink(struct coresight_device *csdev); 143 struct list_head *coresight_build_path(struct coresight_device *csdev, 144 struct coresight_device *sink); 145 void coresight_release_path(struct list_head *path); 146 int coresight_add_sysfs_link(struct coresight_sysfs_link *info); 147 void coresight_remove_sysfs_link(struct coresight_sysfs_link *info); 148 int coresight_create_conns_sysfs_group(struct coresight_device *csdev); 149 void coresight_remove_conns_sysfs_group(struct coresight_device *csdev); 150 int coresight_make_links(struct coresight_device *orig, 151 struct coresight_connection *conn, 152 struct coresight_device *target); 153 void coresight_remove_links(struct coresight_device *orig, 154 struct coresight_connection *conn); 155 156 #if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM3X) 157 extern int etm_readl_cp14(u32 off, unsigned int *val); 158 extern int etm_writel_cp14(u32 off, u32 val); 159 #else 160 static inline int etm_readl_cp14(u32 off, unsigned int *val) { return 0; } 161 static inline int etm_writel_cp14(u32 off, u32 val) { return 0; } 162 #endif 163 164 struct cti_assoc_op { 165 void (*add)(struct coresight_device *csdev); 166 void (*remove)(struct coresight_device *csdev); 167 }; 168 169 extern void coresight_set_cti_ops(const struct cti_assoc_op *cti_op); 170 extern void coresight_remove_cti_ops(void); 171 172 /* 173 * Macros and inline functions to handle CoreSight UCI data and driver 174 * private data in AMBA ID table entries, and extract data values. 175 */ 176 177 /* coresight AMBA ID, no UCI, no driver data: id table entry */ 178 #define CS_AMBA_ID(pid) \ 179 { \ 180 .id = pid, \ 181 .mask = 0x000fffff, \ 182 } 183 184 /* coresight AMBA ID, UCI with driver data only: id table entry. */ 185 #define CS_AMBA_ID_DATA(pid, dval) \ 186 { \ 187 .id = pid, \ 188 .mask = 0x000fffff, \ 189 .data = (void *)&(struct amba_cs_uci_id) \ 190 { \ 191 .data = (void *)dval, \ 192 } \ 193 } 194 195 /* coresight AMBA ID, full UCI structure: id table entry. */ 196 #define CS_AMBA_UCI_ID(pid, uci_ptr) \ 197 { \ 198 .id = pid, \ 199 .mask = 0x000fffff, \ 200 .data = (void *)uci_ptr \ 201 } 202 203 /* extract the data value from a UCI structure given amba_id pointer. */ 204 static inline void *coresight_get_uci_data(const struct amba_id *id) 205 { 206 struct amba_cs_uci_id *uci_id = id->data; 207 208 if (!uci_id) 209 return NULL; 210 211 return uci_id->data; 212 } 213 214 void coresight_release_platform_data(struct coresight_device *csdev, 215 struct coresight_platform_data *pdata); 216 struct coresight_device * 217 coresight_find_csdev_by_fwnode(struct fwnode_handle *r_fwnode); 218 void coresight_set_assoc_ectdev_mutex(struct coresight_device *csdev, 219 struct coresight_device *ect_csdev); 220 221 void coresight_set_percpu_sink(int cpu, struct coresight_device *csdev); 222 struct coresight_device *coresight_get_percpu_sink(int cpu); 223 224 #endif 225