Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Gary R Hook | 3cdbe34 | 2017-05-02 17:33:40 -0500 | [diff] [blame] | 2 | /* |
| 3 | * AMD Cryptographic Coprocessor (CCP) driver |
| 4 | * |
| 5 | * Copyright (C) 2017 Advanced Micro Devices, Inc. |
| 6 | * |
| 7 | * Author: Gary R Hook <gary.hook@amd.com> |
Gary R Hook | 3cdbe34 | 2017-05-02 17:33:40 -0500 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #include <linux/debugfs.h> |
| 11 | #include <linux/ccp.h> |
| 12 | |
| 13 | #include "ccp-dev.h" |
| 14 | |
| 15 | /* DebugFS helpers */ |
| 16 | #define OBUFP (obuf + oboff) |
| 17 | #define OBUFLEN 512 |
| 18 | #define OBUFSPC (OBUFLEN - oboff) |
| 19 | #define OSCNPRINTF(fmt, ...) \ |
| 20 | scnprintf(OBUFP, OBUFSPC, fmt, ## __VA_ARGS__) |
| 21 | |
| 22 | #define BUFLEN 63 |
| 23 | |
| 24 | #define RI_VERSION_NUM 0x0000003F |
| 25 | #define RI_AES_PRESENT 0x00000040 |
| 26 | #define RI_3DES_PRESENT 0x00000080 |
| 27 | #define RI_SHA_PRESENT 0x00000100 |
| 28 | #define RI_RSA_PRESENT 0x00000200 |
| 29 | #define RI_ECC_PRESENT 0x00000400 |
| 30 | #define RI_ZDE_PRESENT 0x00000800 |
| 31 | #define RI_ZCE_PRESENT 0x00001000 |
| 32 | #define RI_TRNG_PRESENT 0x00002000 |
| 33 | #define RI_ELFC_PRESENT 0x00004000 |
| 34 | #define RI_ELFC_SHIFT 14 |
| 35 | #define RI_NUM_VQM 0x00078000 |
| 36 | #define RI_NVQM_SHIFT 15 |
| 37 | #define RI_NVQM(r) (((r) * RI_NUM_VQM) >> RI_NVQM_SHIFT) |
| 38 | #define RI_LSB_ENTRIES 0x0FF80000 |
| 39 | #define RI_NLSB_SHIFT 19 |
| 40 | #define RI_NLSB(r) (((r) * RI_LSB_ENTRIES) >> RI_NLSB_SHIFT) |
| 41 | |
| 42 | static ssize_t ccp5_debugfs_info_read(struct file *filp, char __user *ubuf, |
| 43 | size_t count, loff_t *offp) |
| 44 | { |
| 45 | struct ccp_device *ccp = filp->private_data; |
| 46 | unsigned int oboff = 0; |
| 47 | unsigned int regval; |
| 48 | ssize_t ret; |
| 49 | char *obuf; |
| 50 | |
| 51 | if (!ccp) |
| 52 | return 0; |
| 53 | |
| 54 | obuf = kmalloc(OBUFLEN, GFP_KERNEL); |
| 55 | if (!obuf) |
| 56 | return -ENOMEM; |
| 57 | |
| 58 | oboff += OSCNPRINTF("Device name: %s\n", ccp->name); |
| 59 | oboff += OSCNPRINTF(" RNG name: %s\n", ccp->rngname); |
| 60 | oboff += OSCNPRINTF(" # Queues: %d\n", ccp->cmd_q_count); |
| 61 | oboff += OSCNPRINTF(" # Cmds: %d\n", ccp->cmd_count); |
| 62 | |
| 63 | regval = ioread32(ccp->io_regs + CMD5_PSP_CCP_VERSION); |
| 64 | oboff += OSCNPRINTF(" Version: %d\n", regval & RI_VERSION_NUM); |
| 65 | oboff += OSCNPRINTF(" Engines:"); |
| 66 | if (regval & RI_AES_PRESENT) |
| 67 | oboff += OSCNPRINTF(" AES"); |
| 68 | if (regval & RI_3DES_PRESENT) |
| 69 | oboff += OSCNPRINTF(" 3DES"); |
| 70 | if (regval & RI_SHA_PRESENT) |
| 71 | oboff += OSCNPRINTF(" SHA"); |
| 72 | if (regval & RI_RSA_PRESENT) |
| 73 | oboff += OSCNPRINTF(" RSA"); |
| 74 | if (regval & RI_ECC_PRESENT) |
| 75 | oboff += OSCNPRINTF(" ECC"); |
| 76 | if (regval & RI_ZDE_PRESENT) |
| 77 | oboff += OSCNPRINTF(" ZDE"); |
| 78 | if (regval & RI_ZCE_PRESENT) |
| 79 | oboff += OSCNPRINTF(" ZCE"); |
| 80 | if (regval & RI_TRNG_PRESENT) |
| 81 | oboff += OSCNPRINTF(" TRNG"); |
| 82 | oboff += OSCNPRINTF("\n"); |
| 83 | oboff += OSCNPRINTF(" Queues: %d\n", |
| 84 | (regval & RI_NUM_VQM) >> RI_NVQM_SHIFT); |
| 85 | oboff += OSCNPRINTF("LSB Entries: %d\n", |
| 86 | (regval & RI_LSB_ENTRIES) >> RI_NLSB_SHIFT); |
| 87 | |
| 88 | ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff); |
| 89 | kfree(obuf); |
| 90 | |
| 91 | return ret; |
| 92 | } |
| 93 | |
| 94 | /* Return a formatted buffer containing the current |
| 95 | * statistics across all queues for a CCP. |
| 96 | */ |
| 97 | static ssize_t ccp5_debugfs_stats_read(struct file *filp, char __user *ubuf, |
| 98 | size_t count, loff_t *offp) |
| 99 | { |
| 100 | struct ccp_device *ccp = filp->private_data; |
| 101 | unsigned long total_xts_aes_ops = 0; |
| 102 | unsigned long total_3des_ops = 0; |
| 103 | unsigned long total_aes_ops = 0; |
| 104 | unsigned long total_sha_ops = 0; |
| 105 | unsigned long total_rsa_ops = 0; |
| 106 | unsigned long total_ecc_ops = 0; |
| 107 | unsigned long total_pt_ops = 0; |
| 108 | unsigned long total_ops = 0; |
| 109 | unsigned int oboff = 0; |
| 110 | ssize_t ret = 0; |
| 111 | unsigned int i; |
| 112 | char *obuf; |
| 113 | |
| 114 | for (i = 0; i < ccp->cmd_q_count; i++) { |
| 115 | struct ccp_cmd_queue *cmd_q = &ccp->cmd_q[i]; |
| 116 | |
| 117 | total_ops += cmd_q->total_ops; |
| 118 | total_aes_ops += cmd_q->total_aes_ops; |
| 119 | total_xts_aes_ops += cmd_q->total_xts_aes_ops; |
| 120 | total_3des_ops += cmd_q->total_3des_ops; |
| 121 | total_sha_ops += cmd_q->total_sha_ops; |
| 122 | total_rsa_ops += cmd_q->total_rsa_ops; |
| 123 | total_pt_ops += cmd_q->total_pt_ops; |
| 124 | total_ecc_ops += cmd_q->total_ecc_ops; |
| 125 | } |
| 126 | |
| 127 | obuf = kmalloc(OBUFLEN, GFP_KERNEL); |
| 128 | if (!obuf) |
| 129 | return -ENOMEM; |
| 130 | |
| 131 | oboff += OSCNPRINTF("Total Interrupts Handled: %ld\n", |
| 132 | ccp->total_interrupts); |
| 133 | oboff += OSCNPRINTF(" Total Operations: %ld\n", |
| 134 | total_ops); |
| 135 | oboff += OSCNPRINTF(" AES: %ld\n", |
| 136 | total_aes_ops); |
| 137 | oboff += OSCNPRINTF(" XTS AES: %ld\n", |
| 138 | total_xts_aes_ops); |
| 139 | oboff += OSCNPRINTF(" SHA: %ld\n", |
| 140 | total_3des_ops); |
| 141 | oboff += OSCNPRINTF(" SHA: %ld\n", |
| 142 | total_sha_ops); |
| 143 | oboff += OSCNPRINTF(" RSA: %ld\n", |
| 144 | total_rsa_ops); |
| 145 | oboff += OSCNPRINTF(" Pass-Thru: %ld\n", |
| 146 | total_pt_ops); |
| 147 | oboff += OSCNPRINTF(" ECC: %ld\n", |
| 148 | total_ecc_ops); |
| 149 | |
| 150 | ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff); |
| 151 | kfree(obuf); |
| 152 | |
| 153 | return ret; |
| 154 | } |
| 155 | |
| 156 | /* Reset the counters in a queue |
| 157 | */ |
| 158 | static void ccp5_debugfs_reset_queue_stats(struct ccp_cmd_queue *cmd_q) |
| 159 | { |
| 160 | cmd_q->total_ops = 0L; |
| 161 | cmd_q->total_aes_ops = 0L; |
| 162 | cmd_q->total_xts_aes_ops = 0L; |
| 163 | cmd_q->total_3des_ops = 0L; |
| 164 | cmd_q->total_sha_ops = 0L; |
| 165 | cmd_q->total_rsa_ops = 0L; |
| 166 | cmd_q->total_pt_ops = 0L; |
| 167 | cmd_q->total_ecc_ops = 0L; |
| 168 | } |
| 169 | |
| 170 | /* A value was written to the stats variable, which |
| 171 | * should be used to reset the queue counters across |
| 172 | * that device. |
| 173 | */ |
| 174 | static ssize_t ccp5_debugfs_stats_write(struct file *filp, |
| 175 | const char __user *ubuf, |
| 176 | size_t count, loff_t *offp) |
| 177 | { |
| 178 | struct ccp_device *ccp = filp->private_data; |
| 179 | int i; |
| 180 | |
| 181 | for (i = 0; i < ccp->cmd_q_count; i++) |
| 182 | ccp5_debugfs_reset_queue_stats(&ccp->cmd_q[i]); |
| 183 | ccp->total_interrupts = 0L; |
| 184 | |
| 185 | return count; |
| 186 | } |
| 187 | |
| 188 | /* Return a formatted buffer containing the current information |
| 189 | * for that queue |
| 190 | */ |
| 191 | static ssize_t ccp5_debugfs_queue_read(struct file *filp, char __user *ubuf, |
| 192 | size_t count, loff_t *offp) |
| 193 | { |
| 194 | struct ccp_cmd_queue *cmd_q = filp->private_data; |
| 195 | unsigned int oboff = 0; |
| 196 | unsigned int regval; |
| 197 | ssize_t ret; |
| 198 | char *obuf; |
| 199 | |
| 200 | if (!cmd_q) |
| 201 | return 0; |
| 202 | |
| 203 | obuf = kmalloc(OBUFLEN, GFP_KERNEL); |
| 204 | if (!obuf) |
| 205 | return -ENOMEM; |
| 206 | |
| 207 | oboff += OSCNPRINTF(" Total Queue Operations: %ld\n", |
| 208 | cmd_q->total_ops); |
| 209 | oboff += OSCNPRINTF(" AES: %ld\n", |
| 210 | cmd_q->total_aes_ops); |
| 211 | oboff += OSCNPRINTF(" XTS AES: %ld\n", |
| 212 | cmd_q->total_xts_aes_ops); |
| 213 | oboff += OSCNPRINTF(" SHA: %ld\n", |
| 214 | cmd_q->total_3des_ops); |
| 215 | oboff += OSCNPRINTF(" SHA: %ld\n", |
| 216 | cmd_q->total_sha_ops); |
| 217 | oboff += OSCNPRINTF(" RSA: %ld\n", |
| 218 | cmd_q->total_rsa_ops); |
| 219 | oboff += OSCNPRINTF(" Pass-Thru: %ld\n", |
| 220 | cmd_q->total_pt_ops); |
| 221 | oboff += OSCNPRINTF(" ECC: %ld\n", |
| 222 | cmd_q->total_ecc_ops); |
| 223 | |
| 224 | regval = ioread32(cmd_q->reg_int_enable); |
| 225 | oboff += OSCNPRINTF(" Enabled Interrupts:"); |
| 226 | if (regval & INT_EMPTY_QUEUE) |
| 227 | oboff += OSCNPRINTF(" EMPTY"); |
| 228 | if (regval & INT_QUEUE_STOPPED) |
| 229 | oboff += OSCNPRINTF(" STOPPED"); |
| 230 | if (regval & INT_ERROR) |
| 231 | oboff += OSCNPRINTF(" ERROR"); |
| 232 | if (regval & INT_COMPLETION) |
| 233 | oboff += OSCNPRINTF(" COMPLETION"); |
| 234 | oboff += OSCNPRINTF("\n"); |
| 235 | |
| 236 | ret = simple_read_from_buffer(ubuf, count, offp, obuf, oboff); |
| 237 | kfree(obuf); |
| 238 | |
| 239 | return ret; |
| 240 | } |
| 241 | |
| 242 | /* A value was written to the stats variable for a |
| 243 | * queue. Reset the queue counters to this value. |
| 244 | */ |
| 245 | static ssize_t ccp5_debugfs_queue_write(struct file *filp, |
| 246 | const char __user *ubuf, |
| 247 | size_t count, loff_t *offp) |
| 248 | { |
| 249 | struct ccp_cmd_queue *cmd_q = filp->private_data; |
| 250 | |
| 251 | ccp5_debugfs_reset_queue_stats(cmd_q); |
| 252 | |
| 253 | return count; |
| 254 | } |
| 255 | |
| 256 | static const struct file_operations ccp_debugfs_info_ops = { |
| 257 | .owner = THIS_MODULE, |
| 258 | .open = simple_open, |
| 259 | .read = ccp5_debugfs_info_read, |
| 260 | .write = NULL, |
| 261 | }; |
| 262 | |
| 263 | static const struct file_operations ccp_debugfs_queue_ops = { |
| 264 | .owner = THIS_MODULE, |
| 265 | .open = simple_open, |
| 266 | .read = ccp5_debugfs_queue_read, |
| 267 | .write = ccp5_debugfs_queue_write, |
| 268 | }; |
| 269 | |
| 270 | static const struct file_operations ccp_debugfs_stats_ops = { |
| 271 | .owner = THIS_MODULE, |
| 272 | .open = simple_open, |
| 273 | .read = ccp5_debugfs_stats_read, |
| 274 | .write = ccp5_debugfs_stats_write, |
| 275 | }; |
| 276 | |
| 277 | static struct dentry *ccp_debugfs_dir; |
Sebastian Andrzej Siewior | 79eb382 | 2018-02-23 23:33:07 +0100 | [diff] [blame] | 278 | static DEFINE_MUTEX(ccp_debugfs_lock); |
Gary R Hook | 3cdbe34 | 2017-05-02 17:33:40 -0500 | [diff] [blame] | 279 | |
| 280 | #define MAX_NAME_LEN 20 |
| 281 | |
| 282 | void ccp5_debugfs_setup(struct ccp_device *ccp) |
| 283 | { |
| 284 | struct ccp_cmd_queue *cmd_q; |
| 285 | char name[MAX_NAME_LEN + 1]; |
Gary R Hook | 3cdbe34 | 2017-05-02 17:33:40 -0500 | [diff] [blame] | 286 | struct dentry *debugfs_q_instance; |
Gary R Hook | 3cdbe34 | 2017-05-02 17:33:40 -0500 | [diff] [blame] | 287 | int i; |
| 288 | |
| 289 | if (!debugfs_initialized()) |
| 290 | return; |
| 291 | |
Sebastian Andrzej Siewior | 79eb382 | 2018-02-23 23:33:07 +0100 | [diff] [blame] | 292 | mutex_lock(&ccp_debugfs_lock); |
Gary R Hook | 30b4c54 | 2017-06-19 12:31:17 -0500 | [diff] [blame] | 293 | if (!ccp_debugfs_dir) |
Gary R Hook | 3cdbe34 | 2017-05-02 17:33:40 -0500 | [diff] [blame] | 294 | ccp_debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL); |
Sebastian Andrzej Siewior | 79eb382 | 2018-02-23 23:33:07 +0100 | [diff] [blame] | 295 | mutex_unlock(&ccp_debugfs_lock); |
Gary R Hook | 3cdbe34 | 2017-05-02 17:33:40 -0500 | [diff] [blame] | 296 | |
| 297 | ccp->debugfs_instance = debugfs_create_dir(ccp->name, ccp_debugfs_dir); |
Gary R Hook | 3cdbe34 | 2017-05-02 17:33:40 -0500 | [diff] [blame] | 298 | |
Greg Kroah-Hartman | 31e1d26 | 2019-01-22 16:14:21 +0100 | [diff] [blame] | 299 | debugfs_create_file("info", 0400, ccp->debugfs_instance, ccp, |
| 300 | &ccp_debugfs_info_ops); |
Gary R Hook | 3cdbe34 | 2017-05-02 17:33:40 -0500 | [diff] [blame] | 301 | |
Greg Kroah-Hartman | 31e1d26 | 2019-01-22 16:14:21 +0100 | [diff] [blame] | 302 | debugfs_create_file("stats", 0600, ccp->debugfs_instance, ccp, |
| 303 | &ccp_debugfs_stats_ops); |
Gary R Hook | 3cdbe34 | 2017-05-02 17:33:40 -0500 | [diff] [blame] | 304 | |
| 305 | for (i = 0; i < ccp->cmd_q_count; i++) { |
| 306 | cmd_q = &ccp->cmd_q[i]; |
| 307 | |
| 308 | snprintf(name, MAX_NAME_LEN - 1, "q%d", cmd_q->id); |
| 309 | |
| 310 | debugfs_q_instance = |
| 311 | debugfs_create_dir(name, ccp->debugfs_instance); |
Gary R Hook | 3cdbe34 | 2017-05-02 17:33:40 -0500 | [diff] [blame] | 312 | |
Greg Kroah-Hartman | 31e1d26 | 2019-01-22 16:14:21 +0100 | [diff] [blame] | 313 | debugfs_create_file("stats", 0600, debugfs_q_instance, cmd_q, |
| 314 | &ccp_debugfs_queue_ops); |
Gary R Hook | 3cdbe34 | 2017-05-02 17:33:40 -0500 | [diff] [blame] | 315 | } |
Gary R Hook | 33460b2 | 2017-06-28 11:56:47 -0500 | [diff] [blame] | 316 | |
| 317 | return; |
Gary R Hook | 3cdbe34 | 2017-05-02 17:33:40 -0500 | [diff] [blame] | 318 | } |
| 319 | |
| 320 | void ccp5_debugfs_destroy(void) |
| 321 | { |
| 322 | debugfs_remove_recursive(ccp_debugfs_dir); |
| 323 | } |