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 s32 lo_off; 45 s32 hi_off; 46 }; 47 48 extern ssize_t coresight_simple_show(struct device *_dev, 49 struct device_attribute *attr, char *buf); 50 51 #define coresight_simple_reg32(name, offset) \ 52 (&((struct cs_pair_attribute[]) { \ 53 { \ 54 __ATTR(name, 0444, coresight_simple_show, NULL), \ 55 offset, -1 \ 56 } \ 57 })[0].attr.attr) 58 59 #define coresight_simple_reg64(name, lo_off, hi_off) \ 60 (&((struct cs_pair_attribute[]) { \ 61 { \ 62 __ATTR(name, 0444, coresight_simple_show, NULL), \ 63 lo_off, hi_off \ 64 } \ 65 })[0].attr.attr) 66 67 extern const u32 coresight_barrier_pkt[4]; 68 #define CORESIGHT_BARRIER_PKT_SIZE (sizeof(coresight_barrier_pkt)) 69 70 enum etm_addr_type { 71 ETM_ADDR_TYPE_NONE, 72 ETM_ADDR_TYPE_SINGLE, 73 ETM_ADDR_TYPE_RANGE, 74 ETM_ADDR_TYPE_START, 75 ETM_ADDR_TYPE_STOP, 76 }; 77 78 enum cs_mode { 79 CS_MODE_DISABLED, 80 CS_MODE_SYSFS, 81 CS_MODE_PERF, 82 }; 83 84 /** 85 * struct cs_buffer - keep track of a recording session' specifics 86 * @cur: index of the current buffer 87 * @nr_pages: max number of pages granted to us 88 * @pid: PID this cs_buffer belongs to 89 * @offset: offset within the current buffer 90 * @data_size: how much we collected in this run 91 * @snapshot: is this run in snapshot mode 92 * @data_pages: a handle the ring buffer 93 */ 94 struct cs_buffers { 95 unsigned int cur; 96 unsigned int nr_pages; 97 pid_t pid; 98 unsigned long offset; 99 local_t data_size; 100 bool snapshot; 101 void **data_pages; 102 }; 103 104 static inline void coresight_insert_barrier_packet(void *buf) 105 { 106 if (buf) 107 memcpy(buf, coresight_barrier_pkt, CORESIGHT_BARRIER_PKT_SIZE); 108 } 109 110 static inline void CS_LOCK(void __iomem *addr) 111 { 112 do { 113 /* Wait for things to settle */ 114 mb(); 115 writel_relaxed(0x0, addr + CORESIGHT_LAR); 116 } while (0); 117 } 118 119 static inline void CS_UNLOCK(void __iomem *addr) 120 { 121 do { 122 writel_relaxed(CORESIGHT_UNLOCK, addr + CORESIGHT_LAR); 123 /* Make sure everyone has seen this */ 124 mb(); 125 } while (0); 126 } 127 128 static inline u64 129 coresight_read_reg_pair(void __iomem *addr, s32 lo_offset, s32 hi_offset) 130 { 131 u64 val; 132 133 val = readl_relaxed(addr + lo_offset); 134 val |= (hi_offset < 0) ? 0 : 135 (u64)readl_relaxed(addr + hi_offset) << 32; 136 return val; 137 } 138 139 static inline void coresight_write_reg_pair(void __iomem *addr, u64 val, 140 s32 lo_offset, s32 hi_offset) 141 { 142 writel_relaxed((u32)val, addr + lo_offset); 143 if (hi_offset >= 0) 144 writel_relaxed((u32)(val >> 32), addr + hi_offset); 145 } 146 147 void coresight_disable_path(struct list_head *path); 148 int coresight_enable_path(struct list_head *path, u32 mode, void *sink_data); 149 struct coresight_device *coresight_get_sink(struct list_head *path); 150 struct coresight_device * 151 coresight_get_enabled_sink(struct coresight_device *source); 152 struct coresight_device *coresight_get_sink_by_id(u32 id); 153 struct coresight_device * 154 coresight_find_default_sink(struct coresight_device *csdev); 155 struct list_head *coresight_build_path(struct coresight_device *csdev, 156 struct coresight_device *sink); 157 void coresight_release_path(struct list_head *path); 158 int coresight_add_sysfs_link(struct coresight_sysfs_link *info); 159 void coresight_remove_sysfs_link(struct coresight_sysfs_link *info); 160 int coresight_create_conns_sysfs_group(struct coresight_device *csdev); 161 void coresight_remove_conns_sysfs_group(struct coresight_device *csdev); 162 int coresight_make_links(struct coresight_device *orig, 163 struct coresight_connection *conn, 164 struct coresight_device *target); 165 void coresight_remove_links(struct coresight_device *orig, 166 struct coresight_connection *conn); 167 168 #if IS_ENABLED(CONFIG_CORESIGHT_SOURCE_ETM3X) 169 extern int etm_readl_cp14(u32 off, unsigned int *val); 170 extern int etm_writel_cp14(u32 off, u32 val); 171 #else 172 static inline int etm_readl_cp14(u32 off, unsigned int *val) { return 0; } 173 static inline int etm_writel_cp14(u32 off, u32 val) { return 0; } 174 #endif 175 176 struct cti_assoc_op { 177 void (*add)(struct coresight_device *csdev); 178 void (*remove)(struct coresight_device *csdev); 179 }; 180 181 extern void coresight_set_cti_ops(const struct cti_assoc_op *cti_op); 182 extern void coresight_remove_cti_ops(void); 183 184 /* 185 * Macros and inline functions to handle CoreSight UCI data and driver 186 * private data in AMBA ID table entries, and extract data values. 187 */ 188 189 /* coresight AMBA ID, no UCI, no driver data: id table entry */ 190 #define CS_AMBA_ID(pid) \ 191 { \ 192 .id = pid, \ 193 .mask = 0x000fffff, \ 194 } 195 196 /* coresight AMBA ID, UCI with driver data only: id table entry. */ 197 #define CS_AMBA_ID_DATA(pid, dval) \ 198 { \ 199 .id = pid, \ 200 .mask = 0x000fffff, \ 201 .data = (void *)&(struct amba_cs_uci_id) \ 202 { \ 203 .data = (void *)dval, \ 204 } \ 205 } 206 207 /* coresight AMBA ID, full UCI structure: id table entry. */ 208 #define CS_AMBA_UCI_ID(pid, uci_ptr) \ 209 { \ 210 .id = pid, \ 211 .mask = 0x000fffff, \ 212 .data = (void *)uci_ptr \ 213 } 214 215 /* extract the data value from a UCI structure given amba_id pointer. */ 216 static inline void *coresight_get_uci_data(const struct amba_id *id) 217 { 218 struct amba_cs_uci_id *uci_id = id->data; 219 220 if (!uci_id) 221 return NULL; 222 223 return uci_id->data; 224 } 225 226 void coresight_release_platform_data(struct coresight_device *csdev, 227 struct coresight_platform_data *pdata); 228 struct coresight_device * 229 coresight_find_csdev_by_fwnode(struct fwnode_handle *r_fwnode); 230 void coresight_set_assoc_ectdev_mutex(struct coresight_device *csdev, 231 struct coresight_device *ect_csdev); 232 233 void coresight_set_percpu_sink(int cpu, struct coresight_device *csdev); 234 struct coresight_device *coresight_get_percpu_sink(int cpu); 235 236 #endif 237