471 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * interface.c - contains everything related to the user interface4 *5 * Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@perex.cz>6 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>7 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.8 * Bjorn Helgaas <bjorn.helgaas@hp.com>9 */10 11#include <linux/pnp.h>12#include <linux/string.h>13#include <linux/errno.h>14#include <linux/list.h>15#include <linux/types.h>16#include <linux/stat.h>17#include <linux/ctype.h>18#include <linux/slab.h>19#include <linux/mutex.h>20 21#include <linux/uaccess.h>22 23#include "base.h"24 25struct pnp_info_buffer {26 char *buffer; /* pointer to begin of buffer */27 char *curr; /* current position in buffer */28 unsigned long size; /* current size */29 unsigned long len; /* total length of buffer */30 int stop; /* stop flag */31 int error; /* error code */32};33 34typedef struct pnp_info_buffer pnp_info_buffer_t;35 36__printf(2, 3)37static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)38{39 va_list args;40 int res;41 42 if (buffer->stop || buffer->error)43 return 0;44 va_start(args, fmt);45 res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);46 va_end(args);47 if (buffer->size + res >= buffer->len) {48 buffer->stop = 1;49 return 0;50 }51 buffer->curr += res;52 buffer->size += res;53 return res;54}55 56static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,57 struct pnp_port *port)58{59 pnp_printf(buffer, "%sport %#llx-%#llx, align %#llx, size %#llx, "60 "%i-bit address decoding\n", space,61 (unsigned long long) port->min,62 (unsigned long long) port->max,63 port->align ? ((unsigned long long) port->align - 1) : 0,64 (unsigned long long) port->size,65 port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10);66}67 68static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,69 struct pnp_irq *irq)70{71 int first = 1, i;72 73 pnp_printf(buffer, "%sirq ", space);74 for (i = 0; i < PNP_IRQ_NR; i++)75 if (test_bit(i, irq->map.bits)) {76 if (!first) {77 pnp_printf(buffer, ",");78 } else {79 first = 0;80 }81 if (i == 2 || i == 9)82 pnp_printf(buffer, "2/9");83 else84 pnp_printf(buffer, "%i", i);85 }86 if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))87 pnp_printf(buffer, "<none>");88 if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)89 pnp_printf(buffer, " High-Edge");90 if (irq->flags & IORESOURCE_IRQ_LOWEDGE)91 pnp_printf(buffer, " Low-Edge");92 if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)93 pnp_printf(buffer, " High-Level");94 if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)95 pnp_printf(buffer, " Low-Level");96 if (irq->flags & IORESOURCE_IRQ_OPTIONAL)97 pnp_printf(buffer, " (optional)");98 pnp_printf(buffer, "\n");99}100 101static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,102 struct pnp_dma *dma)103{104 int first = 1, i;105 char *s;106 107 pnp_printf(buffer, "%sdma ", space);108 for (i = 0; i < 8; i++)109 if (dma->map & (1 << i)) {110 if (!first) {111 pnp_printf(buffer, ",");112 } else {113 first = 0;114 }115 pnp_printf(buffer, "%i", i);116 }117 if (!dma->map)118 pnp_printf(buffer, "<none>");119 switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {120 case IORESOURCE_DMA_8BIT:121 s = "8-bit";122 break;123 case IORESOURCE_DMA_8AND16BIT:124 s = "8-bit&16-bit";125 break;126 default:127 s = "16-bit";128 }129 pnp_printf(buffer, " %s", s);130 if (dma->flags & IORESOURCE_DMA_MASTER)131 pnp_printf(buffer, " master");132 if (dma->flags & IORESOURCE_DMA_BYTE)133 pnp_printf(buffer, " byte-count");134 if (dma->flags & IORESOURCE_DMA_WORD)135 pnp_printf(buffer, " word-count");136 switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {137 case IORESOURCE_DMA_TYPEA:138 s = "type-A";139 break;140 case IORESOURCE_DMA_TYPEB:141 s = "type-B";142 break;143 case IORESOURCE_DMA_TYPEF:144 s = "type-F";145 break;146 default:147 s = "compatible";148 break;149 }150 pnp_printf(buffer, " %s\n", s);151}152 153static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,154 struct pnp_mem *mem)155{156 char *s;157 158 pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx",159 space, (unsigned long long) mem->min,160 (unsigned long long) mem->max,161 (unsigned long long) mem->align,162 (unsigned long long) mem->size);163 if (mem->flags & IORESOURCE_MEM_WRITEABLE)164 pnp_printf(buffer, ", writeable");165 if (mem->flags & IORESOURCE_MEM_CACHEABLE)166 pnp_printf(buffer, ", cacheable");167 if (mem->flags & IORESOURCE_MEM_RANGELENGTH)168 pnp_printf(buffer, ", range-length");169 if (mem->flags & IORESOURCE_MEM_SHADOWABLE)170 pnp_printf(buffer, ", shadowable");171 if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)172 pnp_printf(buffer, ", expansion ROM");173 switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {174 case IORESOURCE_MEM_8BIT:175 s = "8-bit";176 break;177 case IORESOURCE_MEM_8AND16BIT:178 s = "8-bit&16-bit";179 break;180 case IORESOURCE_MEM_32BIT:181 s = "32-bit";182 break;183 default:184 s = "16-bit";185 }186 pnp_printf(buffer, ", %s\n", s);187}188 189static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,190 struct pnp_option *option)191{192 switch (option->type) {193 case IORESOURCE_IO:194 pnp_print_port(buffer, space, &option->u.port);195 break;196 case IORESOURCE_MEM:197 pnp_print_mem(buffer, space, &option->u.mem);198 break;199 case IORESOURCE_IRQ:200 pnp_print_irq(buffer, space, &option->u.irq);201 break;202 case IORESOURCE_DMA:203 pnp_print_dma(buffer, space, &option->u.dma);204 break;205 }206}207 208static ssize_t options_show(struct device *dmdev, struct device_attribute *attr,209 char *buf)210{211 struct pnp_dev *dev = to_pnp_dev(dmdev);212 pnp_info_buffer_t *buffer;213 struct pnp_option *option;214 int ret, dep = 0, set = 0;215 char *indent;216 217 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);218 if (!buffer)219 return -ENOMEM;220 221 buffer->len = PAGE_SIZE;222 buffer->buffer = buf;223 buffer->curr = buffer->buffer;224 225 list_for_each_entry(option, &dev->options, list) {226 if (pnp_option_is_dependent(option)) {227 indent = " ";228 if (!dep || pnp_option_set(option) != set) {229 set = pnp_option_set(option);230 dep = 1;231 pnp_printf(buffer, "Dependent: %02i - "232 "Priority %s\n", set,233 pnp_option_priority_name(option));234 }235 } else {236 dep = 0;237 indent = "";238 }239 pnp_print_option(buffer, indent, option);240 }241 242 ret = (buffer->curr - buf);243 kfree(buffer);244 return ret;245}246static DEVICE_ATTR_RO(options);247 248static ssize_t resources_show(struct device *dmdev,249 struct device_attribute *attr, char *buf)250{251 struct pnp_dev *dev = to_pnp_dev(dmdev);252 pnp_info_buffer_t *buffer;253 struct pnp_resource *pnp_res;254 struct resource *res;255 int ret;256 257 if (!dev)258 return -EINVAL;259 260 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);261 if (!buffer)262 return -ENOMEM;263 264 buffer->len = PAGE_SIZE;265 buffer->buffer = buf;266 buffer->curr = buffer->buffer;267 268 pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");269 270 list_for_each_entry(pnp_res, &dev->resources, list) {271 res = &pnp_res->res;272 273 pnp_printf(buffer, pnp_resource_type_name(res));274 275 if (res->flags & IORESOURCE_DISABLED) {276 pnp_printf(buffer, " disabled\n");277 continue;278 }279 280 switch (pnp_resource_type(res)) {281 case IORESOURCE_IO:282 case IORESOURCE_MEM:283 case IORESOURCE_BUS:284 pnp_printf(buffer, " %#llx-%#llx%s\n",285 (unsigned long long) res->start,286 (unsigned long long) res->end,287 res->flags & IORESOURCE_WINDOW ?288 " window" : "");289 break;290 case IORESOURCE_IRQ:291 case IORESOURCE_DMA:292 pnp_printf(buffer, " %lld\n",293 (unsigned long long) res->start);294 break;295 }296 }297 298 ret = (buffer->curr - buf);299 kfree(buffer);300 return ret;301}302 303static char *pnp_get_resource_value(char *buf,304 unsigned long type,305 resource_size_t *start,306 resource_size_t *end,307 unsigned long *flags)308{309 if (start)310 *start = 0;311 if (end)312 *end = 0;313 if (flags)314 *flags = 0;315 316 /* TBD: allow for disabled resources */317 318 buf = skip_spaces(buf);319 if (start) {320 *start = simple_strtoull(buf, &buf, 0);321 if (end) {322 buf = skip_spaces(buf);323 if (*buf == '-') {324 buf = skip_spaces(buf + 1);325 *end = simple_strtoull(buf, &buf, 0);326 } else327 *end = *start;328 }329 }330 331 /* TBD: allow for additional flags, e.g., IORESOURCE_WINDOW */332 333 return buf;334}335 336static ssize_t resources_store(struct device *dmdev,337 struct device_attribute *attr, const char *ubuf,338 size_t count)339{340 struct pnp_dev *dev = to_pnp_dev(dmdev);341 char *buf = (void *)ubuf;342 int retval = 0;343 344 if (dev->status & PNP_ATTACHED) {345 retval = -EBUSY;346 dev_info(&dev->dev, "in use; can't configure\n");347 goto done;348 }349 350 buf = skip_spaces(buf);351 if (!strncasecmp(buf, "disable", 7)) {352 retval = pnp_disable_dev(dev);353 goto done;354 }355 if (!strncasecmp(buf, "activate", 8)) {356 retval = pnp_activate_dev(dev);357 goto done;358 }359 if (!strncasecmp(buf, "fill", 4)) {360 if (dev->active)361 goto done;362 retval = pnp_auto_config_dev(dev);363 goto done;364 }365 if (!strncasecmp(buf, "auto", 4)) {366 if (dev->active)367 goto done;368 pnp_init_resources(dev);369 retval = pnp_auto_config_dev(dev);370 goto done;371 }372 if (!strncasecmp(buf, "clear", 5)) {373 if (dev->active)374 goto done;375 pnp_init_resources(dev);376 goto done;377 }378 if (!strncasecmp(buf, "get", 3)) {379 mutex_lock(&pnp_res_mutex);380 if (pnp_can_read(dev))381 dev->protocol->get(dev);382 mutex_unlock(&pnp_res_mutex);383 goto done;384 }385 if (!strncasecmp(buf, "set", 3)) {386 resource_size_t start;387 resource_size_t end;388 unsigned long flags;389 390 if (dev->active)391 goto done;392 buf += 3;393 pnp_init_resources(dev);394 mutex_lock(&pnp_res_mutex);395 while (1) {396 buf = skip_spaces(buf);397 if (!strncasecmp(buf, "io", 2)) {398 buf = pnp_get_resource_value(buf + 2,399 IORESOURCE_IO,400 &start, &end,401 &flags);402 pnp_add_io_resource(dev, start, end, flags);403 } else if (!strncasecmp(buf, "mem", 3)) {404 buf = pnp_get_resource_value(buf + 3,405 IORESOURCE_MEM,406 &start, &end,407 &flags);408 pnp_add_mem_resource(dev, start, end, flags);409 } else if (!strncasecmp(buf, "irq", 3)) {410 buf = pnp_get_resource_value(buf + 3,411 IORESOURCE_IRQ,412 &start, NULL,413 &flags);414 pnp_add_irq_resource(dev, start, flags);415 } else if (!strncasecmp(buf, "dma", 3)) {416 buf = pnp_get_resource_value(buf + 3,417 IORESOURCE_DMA,418 &start, NULL,419 &flags);420 pnp_add_dma_resource(dev, start, flags);421 } else if (!strncasecmp(buf, "bus", 3)) {422 buf = pnp_get_resource_value(buf + 3,423 IORESOURCE_BUS,424 &start, &end,425 NULL);426 pnp_add_bus_resource(dev, start, end);427 } else428 break;429 }430 mutex_unlock(&pnp_res_mutex);431 goto done;432 }433 434done:435 if (retval < 0)436 return retval;437 return count;438}439static DEVICE_ATTR_RW(resources);440 441static ssize_t id_show(struct device *dmdev, struct device_attribute *attr,442 char *buf)443{444 char *str = buf;445 struct pnp_dev *dev = to_pnp_dev(dmdev);446 struct pnp_id *pos = dev->id;447 448 while (pos) {449 str += sprintf(str, "%s\n", pos->id);450 pos = pos->next;451 }452 return (str - buf);453}454static DEVICE_ATTR_RO(id);455 456static struct attribute *pnp_dev_attrs[] = {457 &dev_attr_resources.attr,458 &dev_attr_options.attr,459 &dev_attr_id.attr,460 NULL,461};462 463static const struct attribute_group pnp_dev_group = {464 .attrs = pnp_dev_attrs,465};466 467const struct attribute_group *pnp_dev_groups[] = {468 &pnp_dev_group,469 NULL,470};471