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 481da177e4SLinus Torvalds static struct proc_dir_entry *proc_bus_nubus_dir; 491da177e4SLinus Torvalds 502f7dd07eSFinn Thain /* 512f7dd07eSFinn Thain * /proc/bus/nubus/x/ stuff 522f7dd07eSFinn Thain */ 532f7dd07eSFinn Thain 542f7dd07eSFinn Thain struct proc_dir_entry *nubus_proc_add_board(struct nubus_board *board) 552f7dd07eSFinn Thain { 562f7dd07eSFinn Thain char name[2]; 572f7dd07eSFinn Thain 582f7dd07eSFinn Thain if (!proc_bus_nubus_dir) 592f7dd07eSFinn Thain return NULL; 602f7dd07eSFinn Thain snprintf(name, sizeof(name), "%x", board->slot); 612f7dd07eSFinn Thain return proc_mkdir(name, proc_bus_nubus_dir); 622f7dd07eSFinn Thain } 632f7dd07eSFinn Thain 642f7dd07eSFinn Thain /* The PDE private data for any directory under /proc/bus/nubus/x/ 652f7dd07eSFinn Thain * is the bytelanes value for the board in slot x. 662f7dd07eSFinn Thain */ 672f7dd07eSFinn Thain 682f7dd07eSFinn Thain struct proc_dir_entry *nubus_proc_add_rsrc_dir(struct proc_dir_entry *procdir, 692f7dd07eSFinn Thain const struct nubus_dirent *ent, 702f7dd07eSFinn Thain struct nubus_board *board) 712f7dd07eSFinn Thain { 722f7dd07eSFinn Thain char name[9]; 732f7dd07eSFinn Thain int lanes = board->lanes; 742f7dd07eSFinn Thain 752f7dd07eSFinn Thain if (!procdir) 762f7dd07eSFinn Thain return NULL; 772f7dd07eSFinn Thain snprintf(name, sizeof(name), "%x", ent->type); 782f7dd07eSFinn Thain return proc_mkdir_data(name, 0555, procdir, (void *)lanes); 792f7dd07eSFinn Thain } 802f7dd07eSFinn Thain 812f7dd07eSFinn Thain /* The PDE private data for a file under /proc/bus/nubus/x/ is a pointer to 822f7dd07eSFinn Thain * an instance of the following structure, which gives the location and size 832f7dd07eSFinn Thain * of the resource data in the slot ROM. For slot resources which hold only a 842f7dd07eSFinn Thain * small integer, this integer value is stored directly and size is set to 0. 852f7dd07eSFinn Thain * A NULL private data pointer indicates an unrecognized resource. 862f7dd07eSFinn Thain */ 872f7dd07eSFinn Thain 882f7dd07eSFinn Thain struct nubus_proc_pde_data { 892f7dd07eSFinn Thain unsigned char *res_ptr; 902f7dd07eSFinn Thain unsigned int res_size; 9111db656aSDavid Howells }; 9211db656aSDavid Howells 932f7dd07eSFinn Thain static struct nubus_proc_pde_data * 942f7dd07eSFinn Thain nubus_proc_alloc_pde_data(unsigned char *ptr, unsigned int size) 951da177e4SLinus Torvalds { 962f7dd07eSFinn Thain struct nubus_proc_pde_data *pde_data; 971da177e4SLinus Torvalds 982f7dd07eSFinn Thain pde_data = kmalloc(sizeof(*pde_data), GFP_KERNEL); 992f7dd07eSFinn Thain if (!pde_data) 1002f7dd07eSFinn Thain return NULL; 1011da177e4SLinus Torvalds 1022f7dd07eSFinn Thain pde_data->res_ptr = ptr; 1032f7dd07eSFinn Thain pde_data->res_size = size; 1042f7dd07eSFinn Thain return pde_data; 1051da177e4SLinus Torvalds } 1061da177e4SLinus Torvalds 1072f7dd07eSFinn Thain static int nubus_proc_rsrc_show(struct seq_file *m, void *v) 1081da177e4SLinus Torvalds { 1092f7dd07eSFinn Thain struct inode *inode = m->private; 1102f7dd07eSFinn Thain struct nubus_proc_pde_data *pde_data; 1112f7dd07eSFinn Thain 1122f7dd07eSFinn Thain pde_data = PDE_DATA(inode); 1132f7dd07eSFinn Thain if (!pde_data) 1142f7dd07eSFinn Thain return 0; 1152f7dd07eSFinn Thain 1162f7dd07eSFinn Thain if (pde_data->res_size > m->size) 1172f7dd07eSFinn Thain return -EFBIG; 1182f7dd07eSFinn Thain 1192f7dd07eSFinn Thain if (pde_data->res_size) { 1202f7dd07eSFinn Thain int lanes = (int)proc_get_parent_data(inode); 1211da177e4SLinus Torvalds struct nubus_dirent ent; 1221da177e4SLinus Torvalds 1232f7dd07eSFinn Thain if (!lanes) 1242f7dd07eSFinn Thain return 0; 1251da177e4SLinus Torvalds 1262f7dd07eSFinn Thain ent.mask = lanes; 1272f7dd07eSFinn Thain ent.base = pde_data->res_ptr; 1282f7dd07eSFinn Thain ent.data = 0; 1292f7dd07eSFinn Thain nubus_seq_write_rsrc_mem(m, &ent, pde_data->res_size); 1301da177e4SLinus Torvalds } else { 1312f7dd07eSFinn Thain unsigned int data = (unsigned int)pde_data->res_ptr; 1322f7dd07eSFinn Thain 1332f7dd07eSFinn Thain seq_putc(m, data >> 16); 1342f7dd07eSFinn Thain seq_putc(m, data >> 8); 1352f7dd07eSFinn Thain seq_putc(m, data >> 0); 1361da177e4SLinus Torvalds } 1372f7dd07eSFinn Thain return 0; 1381da177e4SLinus Torvalds } 1391da177e4SLinus Torvalds 1402f7dd07eSFinn Thain void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir, 1412f7dd07eSFinn Thain const struct nubus_dirent *ent, 1422f7dd07eSFinn Thain unsigned int size) 1432f7dd07eSFinn Thain { 1442f828fb2SFinn Thain char name[9]; 1452f7dd07eSFinn Thain struct nubus_proc_pde_data *pde_data; 1461da177e4SLinus Torvalds 1472f7dd07eSFinn Thain if (!procdir) 1482f7dd07eSFinn Thain return; 1492f7dd07eSFinn Thain 1502f7dd07eSFinn Thain snprintf(name, sizeof(name), "%x", ent->type); 1512f7dd07eSFinn Thain if (size) 1522f7dd07eSFinn Thain pde_data = nubus_proc_alloc_pde_data(nubus_dirptr(ent), size); 1532f7dd07eSFinn Thain else 1542f7dd07eSFinn Thain pde_data = NULL; 1553f3942acSChristoph Hellwig proc_create_single_data(name, S_IFREG | 0444, procdir, 1563f3942acSChristoph Hellwig nubus_proc_rsrc_show, pde_data); 1571da177e4SLinus Torvalds } 1581da177e4SLinus Torvalds 1592f7dd07eSFinn Thain void nubus_proc_add_rsrc(struct proc_dir_entry *procdir, 1602f7dd07eSFinn Thain const struct nubus_dirent *ent) 1612f7dd07eSFinn Thain { 1622f7dd07eSFinn Thain char name[9]; 1632f7dd07eSFinn Thain unsigned char *data = (unsigned char *)ent->data; 1642f7dd07eSFinn Thain 1652f7dd07eSFinn Thain if (!procdir) 1662f7dd07eSFinn Thain return; 1672f7dd07eSFinn Thain 1682f7dd07eSFinn Thain snprintf(name, sizeof(name), "%x", ent->type); 1693f3942acSChristoph Hellwig proc_create_single_data(name, S_IFREG | 0444, procdir, 1703f3942acSChristoph Hellwig nubus_proc_rsrc_show, 1712f7dd07eSFinn Thain nubus_proc_alloc_pde_data(data, 0)); 1721da177e4SLinus Torvalds } 1731da177e4SLinus Torvalds 17411db656aSDavid Howells /* 17511db656aSDavid Howells * /proc/nubus stuff 17611db656aSDavid Howells */ 17711db656aSDavid Howells 1781da177e4SLinus Torvalds void __init nubus_proc_init(void) 1791da177e4SLinus Torvalds { 1803f3942acSChristoph Hellwig proc_create_single("nubus", 0, NULL, nubus_proc_show); 1819c37066dSAlexey Dobriyan proc_bus_nubus_dir = proc_mkdir("bus/nubus", NULL); 1822f7dd07eSFinn Thain if (!proc_bus_nubus_dir) 1832f7dd07eSFinn Thain return; 1843f3942acSChristoph Hellwig proc_create_single("devices", 0, proc_bus_nubus_dir, 1853f3942acSChristoph Hellwig nubus_devices_proc_show); 1861da177e4SLinus Torvalds } 187