1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 21da177e4SLinus Torvalds /* drivers/nubus/proc.c: Proc FS interface for NuBus. 31da177e4SLinus Torvalds 41da177e4SLinus Torvalds By David Huggins-Daines <dhd@debian.org> 51da177e4SLinus Torvalds 61da177e4SLinus Torvalds Much code and many ideas from drivers/pci/proc.c: 71da177e4SLinus Torvalds Copyright (c) 1997, 1998 Martin Mares <mj@atrey.karlin.mff.cuni.cz> 81da177e4SLinus Torvalds 91da177e4SLinus Torvalds This is initially based on the Zorro and PCI interfaces. However, 101da177e4SLinus Torvalds it works somewhat differently. The intent is to provide a 111da177e4SLinus Torvalds structure in /proc analogous to the structure of the NuBus ROM 121da177e4SLinus Torvalds resources. 131da177e4SLinus Torvalds 142f7dd07eSFinn Thain Therefore each board function gets a directory, which may in turn 152f7dd07eSFinn Thain contain subdirectories. Each slot resource is a file. Unrecognized 162f7dd07eSFinn Thain resources are empty files, since every resource ID requires a special 172f7dd07eSFinn Thain case (e.g. if the resource ID implies a directory or block, then its 182f7dd07eSFinn Thain value has to be interpreted as a slot ROM pointer etc.). 192f7dd07eSFinn Thain */ 201da177e4SLinus Torvalds 211da177e4SLinus Torvalds #include <linux/types.h> 221da177e4SLinus Torvalds #include <linux/kernel.h> 231da177e4SLinus Torvalds #include <linux/nubus.h> 241da177e4SLinus Torvalds #include <linux/proc_fs.h> 25076ec04bSAlexey Dobriyan #include <linux/seq_file.h> 262f7dd07eSFinn Thain #include <linux/slab.h> 271da177e4SLinus Torvalds #include <linux/init.h> 2899ffab81SAdrian Bunk #include <linux/module.h> 297c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 301da177e4SLinus Torvalds #include <asm/byteorder.h> 311da177e4SLinus Torvalds 322f7dd07eSFinn Thain /* 332f7dd07eSFinn Thain * /proc/bus/nubus/devices stuff 342f7dd07eSFinn Thain */ 352f7dd07eSFinn Thain 361da177e4SLinus Torvalds static int 37076ec04bSAlexey Dobriyan nubus_devices_proc_show(struct seq_file *m, void *v) 381da177e4SLinus Torvalds { 3941b84816SFinn Thain struct nubus_rsrc *fres; 401da177e4SLinus Torvalds 4141b84816SFinn Thain for_each_func_rsrc(fres) 4241b84816SFinn Thain seq_printf(m, "%x\t%04x %04x %04x %04x\t%08lx\n", 43189e19e8SFinn Thain fres->board->slot, fres->category, fres->type, 4441b84816SFinn Thain fres->dr_sw, fres->dr_hw, fres->board->slot_addr); 45076ec04bSAlexey Dobriyan return 0; 461da177e4SLinus Torvalds } 471da177e4SLinus Torvalds 48076ec04bSAlexey Dobriyan static int nubus_devices_proc_open(struct inode *inode, struct file *file) 49076ec04bSAlexey Dobriyan { 50076ec04bSAlexey Dobriyan return single_open(file, nubus_devices_proc_show, NULL); 51076ec04bSAlexey Dobriyan } 52076ec04bSAlexey Dobriyan 53076ec04bSAlexey Dobriyan static const struct file_operations nubus_devices_proc_fops = { 54076ec04bSAlexey Dobriyan .open = nubus_devices_proc_open, 55076ec04bSAlexey Dobriyan .read = seq_read, 56076ec04bSAlexey Dobriyan .llseek = seq_lseek, 57076ec04bSAlexey Dobriyan .release = single_release, 58076ec04bSAlexey Dobriyan }; 59076ec04bSAlexey Dobriyan 601da177e4SLinus Torvalds static struct proc_dir_entry *proc_bus_nubus_dir; 611da177e4SLinus Torvalds 622f7dd07eSFinn Thain /* 632f7dd07eSFinn Thain * /proc/bus/nubus/x/ stuff 642f7dd07eSFinn Thain */ 652f7dd07eSFinn Thain 662f7dd07eSFinn Thain struct proc_dir_entry *nubus_proc_add_board(struct nubus_board *board) 672f7dd07eSFinn Thain { 682f7dd07eSFinn Thain char name[2]; 692f7dd07eSFinn Thain 702f7dd07eSFinn Thain if (!proc_bus_nubus_dir) 712f7dd07eSFinn Thain return NULL; 722f7dd07eSFinn Thain snprintf(name, sizeof(name), "%x", board->slot); 732f7dd07eSFinn Thain return proc_mkdir(name, proc_bus_nubus_dir); 742f7dd07eSFinn Thain } 752f7dd07eSFinn Thain 762f7dd07eSFinn Thain /* The PDE private data for any directory under /proc/bus/nubus/x/ 772f7dd07eSFinn Thain * is the bytelanes value for the board in slot x. 782f7dd07eSFinn Thain */ 792f7dd07eSFinn Thain 802f7dd07eSFinn Thain struct proc_dir_entry *nubus_proc_add_rsrc_dir(struct proc_dir_entry *procdir, 812f7dd07eSFinn Thain const struct nubus_dirent *ent, 822f7dd07eSFinn Thain struct nubus_board *board) 832f7dd07eSFinn Thain { 842f7dd07eSFinn Thain char name[9]; 852f7dd07eSFinn Thain int lanes = board->lanes; 862f7dd07eSFinn Thain 872f7dd07eSFinn Thain if (!procdir) 882f7dd07eSFinn Thain return NULL; 892f7dd07eSFinn Thain snprintf(name, sizeof(name), "%x", ent->type); 902f7dd07eSFinn Thain return proc_mkdir_data(name, 0555, procdir, (void *)lanes); 912f7dd07eSFinn Thain } 922f7dd07eSFinn Thain 932f7dd07eSFinn Thain /* The PDE private data for a file under /proc/bus/nubus/x/ is a pointer to 942f7dd07eSFinn Thain * an instance of the following structure, which gives the location and size 952f7dd07eSFinn Thain * of the resource data in the slot ROM. For slot resources which hold only a 962f7dd07eSFinn Thain * small integer, this integer value is stored directly and size is set to 0. 972f7dd07eSFinn Thain * A NULL private data pointer indicates an unrecognized resource. 982f7dd07eSFinn Thain */ 992f7dd07eSFinn Thain 1002f7dd07eSFinn Thain struct nubus_proc_pde_data { 1012f7dd07eSFinn Thain unsigned char *res_ptr; 1022f7dd07eSFinn Thain unsigned int res_size; 10311db656aSDavid Howells }; 10411db656aSDavid Howells 1052f7dd07eSFinn Thain static struct nubus_proc_pde_data * 1062f7dd07eSFinn Thain nubus_proc_alloc_pde_data(unsigned char *ptr, unsigned int size) 1071da177e4SLinus Torvalds { 1082f7dd07eSFinn Thain struct nubus_proc_pde_data *pde_data; 1091da177e4SLinus Torvalds 1102f7dd07eSFinn Thain pde_data = kmalloc(sizeof(*pde_data), GFP_KERNEL); 1112f7dd07eSFinn Thain if (!pde_data) 1122f7dd07eSFinn Thain return NULL; 1131da177e4SLinus Torvalds 1142f7dd07eSFinn Thain pde_data->res_ptr = ptr; 1152f7dd07eSFinn Thain pde_data->res_size = size; 1162f7dd07eSFinn Thain return pde_data; 1171da177e4SLinus Torvalds } 1181da177e4SLinus Torvalds 1192f7dd07eSFinn Thain static int nubus_proc_rsrc_show(struct seq_file *m, void *v) 1201da177e4SLinus Torvalds { 1212f7dd07eSFinn Thain struct inode *inode = m->private; 1222f7dd07eSFinn Thain struct nubus_proc_pde_data *pde_data; 1232f7dd07eSFinn Thain 1242f7dd07eSFinn Thain pde_data = PDE_DATA(inode); 1252f7dd07eSFinn Thain if (!pde_data) 1262f7dd07eSFinn Thain return 0; 1272f7dd07eSFinn Thain 1282f7dd07eSFinn Thain if (pde_data->res_size > m->size) 1292f7dd07eSFinn Thain return -EFBIG; 1302f7dd07eSFinn Thain 1312f7dd07eSFinn Thain if (pde_data->res_size) { 1322f7dd07eSFinn Thain int lanes = (int)proc_get_parent_data(inode); 1331da177e4SLinus Torvalds struct nubus_dirent ent; 1341da177e4SLinus Torvalds 1352f7dd07eSFinn Thain if (!lanes) 1362f7dd07eSFinn Thain return 0; 1371da177e4SLinus Torvalds 1382f7dd07eSFinn Thain ent.mask = lanes; 1392f7dd07eSFinn Thain ent.base = pde_data->res_ptr; 1402f7dd07eSFinn Thain ent.data = 0; 1412f7dd07eSFinn Thain nubus_seq_write_rsrc_mem(m, &ent, pde_data->res_size); 1421da177e4SLinus Torvalds } else { 1432f7dd07eSFinn Thain unsigned int data = (unsigned int)pde_data->res_ptr; 1442f7dd07eSFinn Thain 1452f7dd07eSFinn Thain seq_putc(m, data >> 16); 1462f7dd07eSFinn Thain seq_putc(m, data >> 8); 1472f7dd07eSFinn Thain seq_putc(m, data >> 0); 1481da177e4SLinus Torvalds } 1492f7dd07eSFinn Thain return 0; 1501da177e4SLinus Torvalds } 1511da177e4SLinus Torvalds 1522f7dd07eSFinn Thain static int nubus_proc_rsrc_open(struct inode *inode, struct file *file) 1531da177e4SLinus Torvalds { 1542f7dd07eSFinn Thain return single_open(file, nubus_proc_rsrc_show, inode); 1552f7dd07eSFinn Thain } 1562f7dd07eSFinn Thain 1572f7dd07eSFinn Thain static const struct file_operations nubus_proc_rsrc_fops = { 1582f7dd07eSFinn Thain .open = nubus_proc_rsrc_open, 1592f7dd07eSFinn Thain .read = seq_read, 1602f7dd07eSFinn Thain .llseek = seq_lseek, 1612f7dd07eSFinn Thain .release = single_release, 1622f7dd07eSFinn Thain }; 1632f7dd07eSFinn Thain 1642f7dd07eSFinn Thain void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir, 1652f7dd07eSFinn Thain const struct nubus_dirent *ent, 1662f7dd07eSFinn Thain unsigned int size) 1672f7dd07eSFinn Thain { 1682f828fb2SFinn Thain char name[9]; 1692f7dd07eSFinn Thain struct nubus_proc_pde_data *pde_data; 1701da177e4SLinus Torvalds 1712f7dd07eSFinn Thain if (!procdir) 1722f7dd07eSFinn Thain return; 1732f7dd07eSFinn Thain 1742f7dd07eSFinn Thain snprintf(name, sizeof(name), "%x", ent->type); 1752f7dd07eSFinn Thain if (size) 1762f7dd07eSFinn Thain pde_data = nubus_proc_alloc_pde_data(nubus_dirptr(ent), size); 1772f7dd07eSFinn Thain else 1782f7dd07eSFinn Thain pde_data = NULL; 1792f7dd07eSFinn Thain proc_create_data(name, S_IFREG | 0444, procdir, 1802f7dd07eSFinn Thain &nubus_proc_rsrc_fops, pde_data); 1811da177e4SLinus Torvalds } 1821da177e4SLinus Torvalds 1832f7dd07eSFinn Thain void nubus_proc_add_rsrc(struct proc_dir_entry *procdir, 1842f7dd07eSFinn Thain const struct nubus_dirent *ent) 1852f7dd07eSFinn Thain { 1862f7dd07eSFinn Thain char name[9]; 1872f7dd07eSFinn Thain unsigned char *data = (unsigned char *)ent->data; 1882f7dd07eSFinn Thain 1892f7dd07eSFinn Thain if (!procdir) 1902f7dd07eSFinn Thain return; 1912f7dd07eSFinn Thain 1922f7dd07eSFinn Thain snprintf(name, sizeof(name), "%x", ent->type); 1932f7dd07eSFinn Thain proc_create_data(name, S_IFREG | 0444, procdir, 1942f7dd07eSFinn Thain &nubus_proc_rsrc_fops, 1952f7dd07eSFinn Thain nubus_proc_alloc_pde_data(data, 0)); 1961da177e4SLinus Torvalds } 1971da177e4SLinus Torvalds 19811db656aSDavid Howells /* 19911db656aSDavid Howells * /proc/nubus stuff 20011db656aSDavid Howells */ 20111db656aSDavid Howells static int nubus_proc_show(struct seq_file *m, void *v) 20211db656aSDavid Howells { 20311db656aSDavid Howells const struct nubus_board *board = v; 20411db656aSDavid Howells 20511db656aSDavid Howells /* Display header on line 1 */ 20611db656aSDavid Howells if (v == SEQ_START_TOKEN) 20711db656aSDavid Howells seq_puts(m, "Nubus devices found:\n"); 20811db656aSDavid Howells else 20911db656aSDavid Howells seq_printf(m, "Slot %X: %s\n", board->slot, board->name); 21011db656aSDavid Howells return 0; 21111db656aSDavid Howells } 21211db656aSDavid Howells 21311db656aSDavid Howells static void *nubus_proc_start(struct seq_file *m, loff_t *_pos) 21411db656aSDavid Howells { 21511db656aSDavid Howells struct nubus_board *board; 21611db656aSDavid Howells unsigned pos; 21711db656aSDavid Howells 21811db656aSDavid Howells if (*_pos > LONG_MAX) 21911db656aSDavid Howells return NULL; 22011db656aSDavid Howells pos = *_pos; 22111db656aSDavid Howells if (pos == 0) 22211db656aSDavid Howells return SEQ_START_TOKEN; 22311db656aSDavid Howells for (board = nubus_boards; board; board = board->next) 22411db656aSDavid Howells if (--pos == 0) 22511db656aSDavid Howells break; 22611db656aSDavid Howells return board; 22711db656aSDavid Howells } 22811db656aSDavid Howells 22911db656aSDavid Howells static void *nubus_proc_next(struct seq_file *p, void *v, loff_t *_pos) 23011db656aSDavid Howells { 23111db656aSDavid Howells /* Walk the list of NuBus boards */ 23211db656aSDavid Howells struct nubus_board *board = v; 23311db656aSDavid Howells 23411db656aSDavid Howells ++*_pos; 23511db656aSDavid Howells if (v == SEQ_START_TOKEN) 23611db656aSDavid Howells board = nubus_boards; 23711db656aSDavid Howells else if (board) 23811db656aSDavid Howells board = board->next; 23911db656aSDavid Howells return board; 24011db656aSDavid Howells } 24111db656aSDavid Howells 24211db656aSDavid Howells static void nubus_proc_stop(struct seq_file *p, void *v) 24311db656aSDavid Howells { 24411db656aSDavid Howells } 24511db656aSDavid Howells 24611db656aSDavid Howells static const struct seq_operations nubus_proc_seqops = { 24711db656aSDavid Howells .start = nubus_proc_start, 24811db656aSDavid Howells .next = nubus_proc_next, 24911db656aSDavid Howells .stop = nubus_proc_stop, 25011db656aSDavid Howells .show = nubus_proc_show, 25111db656aSDavid Howells }; 25211db656aSDavid Howells 25311db656aSDavid Howells static int nubus_proc_open(struct inode *inode, struct file *file) 25411db656aSDavid Howells { 25511db656aSDavid Howells return seq_open(file, &nubus_proc_seqops); 25611db656aSDavid Howells } 25711db656aSDavid Howells 25811db656aSDavid Howells static const struct file_operations nubus_proc_fops = { 25911db656aSDavid Howells .open = nubus_proc_open, 26011db656aSDavid Howells .read = seq_read, 26111db656aSDavid Howells .llseek = seq_lseek, 26211db656aSDavid Howells .release = seq_release, 26311db656aSDavid Howells }; 26411db656aSDavid Howells 2651da177e4SLinus Torvalds void __init nubus_proc_init(void) 2661da177e4SLinus Torvalds { 26711db656aSDavid Howells proc_create("nubus", 0, NULL, &nubus_proc_fops); 2689c37066dSAlexey Dobriyan proc_bus_nubus_dir = proc_mkdir("bus/nubus", NULL); 2692f7dd07eSFinn Thain if (!proc_bus_nubus_dir) 2702f7dd07eSFinn Thain return; 271076ec04bSAlexey Dobriyan proc_create("devices", 0, proc_bus_nubus_dir, &nubus_devices_proc_fops); 2721da177e4SLinus Torvalds } 273