Frank Haverkamp | b2a6513 | 2013-12-09 13:30:43 +0100 | [diff] [blame] | 1 | /** |
| 2 | * IBM Accelerator Family 'GenWQE' |
| 3 | * |
| 4 | * (C) Copyright IBM Corp. 2013 |
| 5 | * |
| 6 | * Author: Frank Haverkamp <haver@linux.vnet.ibm.com> |
| 7 | * Author: Joerg-Stephan Vogt <jsvogt@de.ibm.com> |
| 8 | * Author: Michael Jung <mijung@de.ibm.com> |
| 9 | * Author: Michael Ruettger <michael@ibmra.de> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License (version 2 only) |
| 13 | * as published by the Free Software Foundation. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | */ |
| 20 | |
| 21 | /* |
| 22 | * Sysfs interfaces for the GenWQE card. There are attributes to query |
| 23 | * the version of the bitstream as well as some for the driver. For |
| 24 | * debugging, please also see the debugfs interfaces of this driver. |
| 25 | */ |
| 26 | |
| 27 | #include <linux/version.h> |
| 28 | #include <linux/kernel.h> |
| 29 | #include <linux/types.h> |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/pci.h> |
| 32 | #include <linux/string.h> |
| 33 | #include <linux/fs.h> |
| 34 | #include <linux/sysfs.h> |
| 35 | #include <linux/ctype.h> |
| 36 | #include <linux/device.h> |
| 37 | |
| 38 | #include "card_base.h" |
| 39 | #include "card_ddcb.h" |
| 40 | |
| 41 | static const char * const genwqe_types[] = { |
| 42 | [GENWQE_TYPE_ALTERA_230] = "GenWQE4-230", |
| 43 | [GENWQE_TYPE_ALTERA_530] = "GenWQE4-530", |
| 44 | [GENWQE_TYPE_ALTERA_A4] = "GenWQE5-A4", |
| 45 | [GENWQE_TYPE_ALTERA_A7] = "GenWQE5-A7", |
| 46 | }; |
| 47 | |
| 48 | static ssize_t status_show(struct device *dev, struct device_attribute *attr, |
| 49 | char *buf) |
| 50 | { |
| 51 | struct genwqe_dev *cd = dev_get_drvdata(dev); |
| 52 | const char *cs[GENWQE_CARD_STATE_MAX] = { "unused", "used", "error" }; |
| 53 | |
| 54 | return sprintf(buf, "%s\n", cs[cd->card_state]); |
| 55 | } |
| 56 | static DEVICE_ATTR_RO(status); |
| 57 | |
| 58 | static ssize_t appid_show(struct device *dev, struct device_attribute *attr, |
| 59 | char *buf) |
| 60 | { |
| 61 | char app_name[5]; |
| 62 | struct genwqe_dev *cd = dev_get_drvdata(dev); |
| 63 | |
| 64 | genwqe_read_app_id(cd, app_name, sizeof(app_name)); |
| 65 | return sprintf(buf, "%s\n", app_name); |
| 66 | } |
| 67 | static DEVICE_ATTR_RO(appid); |
| 68 | |
| 69 | static ssize_t version_show(struct device *dev, struct device_attribute *attr, |
| 70 | char *buf) |
| 71 | { |
| 72 | u64 slu_id, app_id; |
| 73 | struct genwqe_dev *cd = dev_get_drvdata(dev); |
| 74 | |
| 75 | slu_id = __genwqe_readq(cd, IO_SLU_UNITCFG); |
| 76 | app_id = __genwqe_readq(cd, IO_APP_UNITCFG); |
| 77 | |
| 78 | return sprintf(buf, "%016llx.%016llx\n", slu_id, app_id); |
| 79 | } |
| 80 | static DEVICE_ATTR_RO(version); |
| 81 | |
| 82 | static ssize_t type_show(struct device *dev, struct device_attribute *attr, |
| 83 | char *buf) |
| 84 | { |
| 85 | u8 card_type; |
| 86 | struct genwqe_dev *cd = dev_get_drvdata(dev); |
| 87 | |
| 88 | card_type = genwqe_card_type(cd); |
| 89 | return sprintf(buf, "%s\n", (card_type >= ARRAY_SIZE(genwqe_types)) ? |
| 90 | "invalid" : genwqe_types[card_type]); |
| 91 | } |
| 92 | static DEVICE_ATTR_RO(type); |
| 93 | |
| 94 | static ssize_t driver_show(struct device *dev, struct device_attribute *attr, |
| 95 | char *buf) |
| 96 | { |
| 97 | return sprintf(buf, "%s\n", DRV_VERS_STRING); |
| 98 | } |
| 99 | static DEVICE_ATTR_RO(driver); |
| 100 | |
| 101 | static ssize_t tempsens_show(struct device *dev, struct device_attribute *attr, |
| 102 | char *buf) |
| 103 | { |
| 104 | u64 tempsens; |
| 105 | struct genwqe_dev *cd = dev_get_drvdata(dev); |
| 106 | |
| 107 | tempsens = __genwqe_readq(cd, IO_SLU_TEMPERATURE_SENSOR); |
| 108 | return sprintf(buf, "%016llx\n", tempsens); |
| 109 | } |
| 110 | static DEVICE_ATTR_RO(tempsens); |
| 111 | |
| 112 | static ssize_t freerunning_timer_show(struct device *dev, |
| 113 | struct device_attribute *attr, |
| 114 | char *buf) |
| 115 | { |
| 116 | u64 t; |
| 117 | struct genwqe_dev *cd = dev_get_drvdata(dev); |
| 118 | |
| 119 | t = __genwqe_readq(cd, IO_SLC_FREE_RUNNING_TIMER); |
| 120 | return sprintf(buf, "%016llx\n", t); |
| 121 | } |
| 122 | static DEVICE_ATTR_RO(freerunning_timer); |
| 123 | |
| 124 | static ssize_t queue_working_time_show(struct device *dev, |
| 125 | struct device_attribute *attr, |
| 126 | char *buf) |
| 127 | { |
| 128 | u64 t; |
| 129 | struct genwqe_dev *cd = dev_get_drvdata(dev); |
| 130 | |
| 131 | t = __genwqe_readq(cd, IO_SLC_QUEUE_WTIME); |
| 132 | return sprintf(buf, "%016llx\n", t); |
| 133 | } |
| 134 | static DEVICE_ATTR_RO(queue_working_time); |
| 135 | |
| 136 | static ssize_t base_clock_show(struct device *dev, |
| 137 | struct device_attribute *attr, |
| 138 | char *buf) |
| 139 | { |
| 140 | u64 base_clock; |
| 141 | struct genwqe_dev *cd = dev_get_drvdata(dev); |
| 142 | |
| 143 | base_clock = genwqe_base_clock_frequency(cd); |
| 144 | return sprintf(buf, "%lld\n", base_clock); |
| 145 | } |
| 146 | static DEVICE_ATTR_RO(base_clock); |
| 147 | |
| 148 | /** |
| 149 | * curr_bitstream_show() - Show the current bitstream id |
| 150 | * |
| 151 | * There is a bug in some old versions of the CPLD which selects the |
| 152 | * bitstream, which causes the IO_SLU_BITSTREAM register to report |
| 153 | * unreliable data in very rare cases. This makes this sysfs |
| 154 | * unreliable up to the point were a new CPLD version is being used. |
| 155 | * |
| 156 | * Unfortunately there is no automatic way yet to query the CPLD |
| 157 | * version, such that you need to manually ensure via programming |
| 158 | * tools that you have a recent version of the CPLD software. |
| 159 | * |
| 160 | * The proposed circumvention is to use a special recovery bitstream |
| 161 | * on the backup partition (0) to identify problems while loading the |
| 162 | * image. |
| 163 | */ |
| 164 | static ssize_t curr_bitstream_show(struct device *dev, |
| 165 | struct device_attribute *attr, char *buf) |
| 166 | { |
| 167 | int curr_bitstream; |
| 168 | struct genwqe_dev *cd = dev_get_drvdata(dev); |
| 169 | |
| 170 | curr_bitstream = __genwqe_readq(cd, IO_SLU_BITSTREAM) & 0x1; |
| 171 | return sprintf(buf, "%d\n", curr_bitstream); |
| 172 | } |
| 173 | static DEVICE_ATTR_RO(curr_bitstream); |
| 174 | |
| 175 | /** |
| 176 | * next_bitstream_show() - Show the next activated bitstream |
| 177 | * |
| 178 | * IO_SLC_CFGREG_SOFTRESET: This register can only be accessed by the PF. |
| 179 | */ |
| 180 | static ssize_t next_bitstream_show(struct device *dev, |
| 181 | struct device_attribute *attr, char *buf) |
| 182 | { |
| 183 | int next_bitstream; |
| 184 | struct genwqe_dev *cd = dev_get_drvdata(dev); |
| 185 | |
| 186 | switch ((cd->softreset & 0xc) >> 2) { |
| 187 | case 0x2: |
| 188 | next_bitstream = 0; |
| 189 | break; |
| 190 | case 0x3: |
| 191 | next_bitstream = 1; |
| 192 | break; |
| 193 | default: |
| 194 | next_bitstream = -1; |
| 195 | break; /* error */ |
| 196 | } |
| 197 | return sprintf(buf, "%d\n", next_bitstream); |
| 198 | } |
| 199 | |
| 200 | static ssize_t next_bitstream_store(struct device *dev, |
| 201 | struct device_attribute *attr, |
| 202 | const char *buf, size_t count) |
| 203 | { |
| 204 | int partition; |
| 205 | struct genwqe_dev *cd = dev_get_drvdata(dev); |
| 206 | |
| 207 | if (kstrtoint(buf, 0, &partition) < 0) |
| 208 | return -EINVAL; |
| 209 | |
| 210 | switch (partition) { |
| 211 | case 0x0: |
| 212 | cd->softreset = 0x78; |
| 213 | break; |
| 214 | case 0x1: |
| 215 | cd->softreset = 0x7c; |
| 216 | break; |
| 217 | default: |
| 218 | return -EINVAL; |
| 219 | } |
| 220 | |
| 221 | __genwqe_writeq(cd, IO_SLC_CFGREG_SOFTRESET, cd->softreset); |
| 222 | return count; |
| 223 | } |
| 224 | static DEVICE_ATTR_RW(next_bitstream); |
| 225 | |
| 226 | /* |
| 227 | * Create device_attribute structures / params: name, mode, show, store |
| 228 | * additional flag if valid in VF |
| 229 | */ |
| 230 | static struct attribute *genwqe_attributes[] = { |
| 231 | &dev_attr_tempsens.attr, |
| 232 | &dev_attr_next_bitstream.attr, |
| 233 | &dev_attr_curr_bitstream.attr, |
| 234 | &dev_attr_base_clock.attr, |
| 235 | &dev_attr_driver.attr, |
| 236 | &dev_attr_type.attr, |
| 237 | &dev_attr_version.attr, |
| 238 | &dev_attr_appid.attr, |
| 239 | &dev_attr_status.attr, |
| 240 | &dev_attr_freerunning_timer.attr, |
| 241 | &dev_attr_queue_working_time.attr, |
| 242 | NULL, |
| 243 | }; |
| 244 | |
| 245 | static struct attribute *genwqe_normal_attributes[] = { |
| 246 | &dev_attr_driver.attr, |
| 247 | &dev_attr_type.attr, |
| 248 | &dev_attr_version.attr, |
| 249 | &dev_attr_appid.attr, |
| 250 | &dev_attr_status.attr, |
| 251 | &dev_attr_freerunning_timer.attr, |
| 252 | &dev_attr_queue_working_time.attr, |
| 253 | NULL, |
| 254 | }; |
| 255 | |
| 256 | /** |
| 257 | * genwqe_is_visible() - Determine if sysfs attribute should be visible or not |
| 258 | * |
| 259 | * VFs have restricted mmio capabilities, so not all sysfs entries |
| 260 | * are allowed in VFs. |
| 261 | */ |
| 262 | static umode_t genwqe_is_visible(struct kobject *kobj, |
| 263 | struct attribute *attr, int n) |
| 264 | { |
| 265 | unsigned int j; |
| 266 | struct device *dev = container_of(kobj, struct device, kobj); |
| 267 | struct genwqe_dev *cd = dev_get_drvdata(dev); |
| 268 | umode_t mode = attr->mode; |
| 269 | |
| 270 | if (genwqe_is_privileged(cd)) |
| 271 | return mode; |
| 272 | |
| 273 | for (j = 0; genwqe_normal_attributes[j] != NULL; j++) |
| 274 | if (genwqe_normal_attributes[j] == attr) |
| 275 | return mode; |
| 276 | |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | static struct attribute_group genwqe_attribute_group = { |
| 281 | .is_visible = genwqe_is_visible, |
| 282 | .attrs = genwqe_attributes, |
| 283 | }; |
| 284 | |
| 285 | const struct attribute_group *genwqe_attribute_groups[] = { |
| 286 | &genwqe_attribute_group, |
| 287 | NULL, |
| 288 | }; |