Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 | /*
* Copyright 2014 IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include "cxl.h"
#define to_afu_chardev_m(d) dev_get_drvdata(d)
/********* Adapter attributes **********************************************/
static ssize_t caia_version_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl *adapter = to_cxl_adapter(device);
return scnprintf(buf, PAGE_SIZE, "%i.%i\n", adapter->caia_major,
adapter->caia_minor);
}
static ssize_t psl_revision_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl *adapter = to_cxl_adapter(device);
return scnprintf(buf, PAGE_SIZE, "%i\n", adapter->psl_rev);
}
static ssize_t base_image_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl *adapter = to_cxl_adapter(device);
return scnprintf(buf, PAGE_SIZE, "%i\n", adapter->base_image);
}
static ssize_t image_loaded_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl *adapter = to_cxl_adapter(device);
if (adapter->user_image_loaded)
return scnprintf(buf, PAGE_SIZE, "user\n");
return scnprintf(buf, PAGE_SIZE, "factory\n");
}
static struct device_attribute adapter_attrs[] = {
__ATTR_RO(caia_version),
__ATTR_RO(psl_revision),
__ATTR_RO(base_image),
__ATTR_RO(image_loaded),
};
/********* AFU master specific attributes **********************************/
static ssize_t mmio_size_show_master(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl_afu *afu = to_afu_chardev_m(device);
return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->adapter->ps_size);
}
static ssize_t pp_mmio_off_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl_afu *afu = to_afu_chardev_m(device);
return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->pp_offset);
}
static ssize_t pp_mmio_len_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl_afu *afu = to_afu_chardev_m(device);
return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->pp_size);
}
static struct device_attribute afu_master_attrs[] = {
__ATTR(mmio_size, S_IRUGO, mmio_size_show_master, NULL),
__ATTR_RO(pp_mmio_off),
__ATTR_RO(pp_mmio_len),
};
/********* AFU attributes **************************************************/
static ssize_t mmio_size_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl_afu *afu = to_cxl_afu(device);
if (afu->pp_size)
return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->pp_size);
return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->adapter->ps_size);
}
static ssize_t reset_store_afu(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct cxl_afu *afu = to_cxl_afu(device);
int rc;
/* Not safe to reset if it is currently in use */
mutex_lock(&afu->contexts_lock);
if (!idr_is_empty(&afu->contexts_idr)) {
rc = -EBUSY;
goto err;
}
if ((rc = cxl_afu_reset(afu)))
goto err;
rc = count;
err:
mutex_unlock(&afu->contexts_lock);
return rc;
}
static ssize_t irqs_min_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl_afu *afu = to_cxl_afu(device);
return scnprintf(buf, PAGE_SIZE, "%i\n", afu->pp_irqs);
}
static ssize_t irqs_max_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl_afu *afu = to_cxl_afu(device);
return scnprintf(buf, PAGE_SIZE, "%i\n", afu->irqs_max);
}
static ssize_t irqs_max_store(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct cxl_afu *afu = to_cxl_afu(device);
ssize_t ret;
int irqs_max;
ret = sscanf(buf, "%i", &irqs_max);
if (ret != 1)
return -EINVAL;
if (irqs_max < afu->pp_irqs)
return -EINVAL;
if (irqs_max > afu->adapter->user_irqs)
return -EINVAL;
afu->irqs_max = irqs_max;
return count;
}
static ssize_t modes_supported_show(struct device *device,
struct device_attribute *attr, char *buf)
{
struct cxl_afu *afu = to_cxl_afu(device);
char *p = buf, *end = buf + PAGE_SIZE;
if (afu->modes_supported & CXL_MODE_DEDICATED)
p += scnprintf(p, end - p, "dedicated_process\n");
if (afu->modes_supported & CXL_MODE_DIRECTED)
p += scnprintf(p, end - p, "afu_directed\n");
return (p - buf);
}
static ssize_t prefault_mode_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl_afu *afu = to_cxl_afu(device);
switch (afu->prefault_mode) {
case CXL_PREFAULT_WED:
return scnprintf(buf, PAGE_SIZE, "work_element_descriptor\n");
case CXL_PREFAULT_ALL:
return scnprintf(buf, PAGE_SIZE, "all\n");
default:
return scnprintf(buf, PAGE_SIZE, "none\n");
}
}
static ssize_t prefault_mode_store(struct device *device,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct cxl_afu *afu = to_cxl_afu(device);
enum prefault_modes mode = -1;
if (!strncmp(buf, "work_element_descriptor", 23))
mode = CXL_PREFAULT_WED;
if (!strncmp(buf, "all", 3))
mode = CXL_PREFAULT_ALL;
if (!strncmp(buf, "none", 4))
mode = CXL_PREFAULT_NONE;
if (mode == -1)
return -EINVAL;
afu->prefault_mode = mode;
return count;
}
static ssize_t mode_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
struct cxl_afu *afu = to_cxl_afu(device);
if (afu->current_mode == CXL_MODE_DEDICATED)
return scnprintf(buf, PAGE_SIZE, "dedicated_process\n");
if (afu->current_mode == CXL_MODE_DIRECTED)
return scnprintf(buf, PAGE_SIZE, "afu_directed\n");
return scnprintf(buf, PAGE_SIZE, "none\n");
}
static ssize_t mode_store(struct device *device, struct device_attribute *attr,
const char *buf, size_t count)
{
struct cxl_afu *afu = to_cxl_afu(device);
int old_mode, mode = -1;
int rc = -EBUSY;
/* can't change this if we have a user */
mutex_lock(&afu->contexts_lock);
if (!idr_is_empty(&afu->contexts_idr))
goto err;
if (!strncmp(buf, "dedicated_process", 17))
mode = CXL_MODE_DEDICATED;
if (!strncmp(buf, "afu_directed", 12))
mode = CXL_MODE_DIRECTED;
if (!strncmp(buf, "none", 4))
mode = 0;
if (mode == -1) {
rc = -EINVAL;
goto err;
}
/*
* cxl_afu_deactivate_mode needs to be done outside the lock, prevent
* other contexts coming in before we are ready:
*/
old_mode = afu->current_mode;
afu->current_mode = 0;
afu->num_procs = 0;
mutex_unlock(&afu->contexts_lock);
if ((rc = _cxl_afu_deactivate_mode(afu, old_mode)))
return rc;
if ((rc = cxl_afu_activate_mode(afu, mode)))
return rc;
return count;
err:
mutex_unlock(&afu->contexts_lock);
return rc;
}
static ssize_t api_version_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%i\n", CXL_API_VERSION);
}
static ssize_t api_version_compatible_show(struct device *device,
struct device_attribute *attr,
char *buf)
{
return scnprintf(buf, PAGE_SIZE, "%i\n", CXL_API_VERSION_COMPATIBLE);
}
static struct device_attribute afu_attrs[] = {
__ATTR_RO(mmio_size),
__ATTR_RO(irqs_min),
__ATTR_RW(irqs_max),
__ATTR_RO(modes_supported),
__ATTR_RW(mode),
__ATTR_RW(prefault_mode),
__ATTR_RO(api_version),
__ATTR_RO(api_version_compatible),
__ATTR(reset, S_IWUSR, NULL, reset_store_afu),
};
int cxl_sysfs_adapter_add(struct cxl *adapter)
{
int i, rc;
for (i = 0; i < ARRAY_SIZE(adapter_attrs); i++) {
if ((rc = device_create_file(&adapter->dev, &adapter_attrs[i])))
goto err;
}
return 0;
err:
for (i--; i >= 0; i--)
device_remove_file(&adapter->dev, &adapter_attrs[i]);
return rc;
}
void cxl_sysfs_adapter_remove(struct cxl *adapter)
{
int i;
for (i = 0; i < ARRAY_SIZE(adapter_attrs); i++)
device_remove_file(&adapter->dev, &adapter_attrs[i]);
}
int cxl_sysfs_afu_add(struct cxl_afu *afu)
{
int i, rc;
for (i = 0; i < ARRAY_SIZE(afu_attrs); i++) {
if ((rc = device_create_file(&afu->dev, &afu_attrs[i])))
goto err;
}
return 0;
err:
for (i--; i >= 0; i--)
device_remove_file(&afu->dev, &afu_attrs[i]);
return rc;
}
void cxl_sysfs_afu_remove(struct cxl_afu *afu)
{
int i;
for (i = 0; i < ARRAY_SIZE(afu_attrs); i++)
device_remove_file(&afu->dev, &afu_attrs[i]);
}
int cxl_sysfs_afu_m_add(struct cxl_afu *afu)
{
int i, rc;
for (i = 0; i < ARRAY_SIZE(afu_master_attrs); i++) {
if ((rc = device_create_file(afu->chardev_m, &afu_master_attrs[i])))
goto err;
}
return 0;
err:
for (i--; i >= 0; i--)
device_remove_file(afu->chardev_m, &afu_master_attrs[i]);
return rc;
}
void cxl_sysfs_afu_m_remove(struct cxl_afu *afu)
{
int i;
for (i = 0; i < ARRAY_SIZE(afu_master_attrs); i++)
device_remove_file(afu->chardev_m, &afu_master_attrs[i]);
}
|