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); 78*b7629ce6SFinn Thain remove_proc_subtree(name, procdir); 792f7dd07eSFinn Thain return proc_mkdir_data(name, 0555, procdir, (void *)lanes); 802f7dd07eSFinn Thain } 812f7dd07eSFinn Thain 822f7dd07eSFinn Thain /* The PDE private data for a file under /proc/bus/nubus/x/ is a pointer to 832f7dd07eSFinn Thain * an instance of the following structure, which gives the location and size 842f7dd07eSFinn Thain * of the resource data in the slot ROM. For slot resources which hold only a 852f7dd07eSFinn Thain * small integer, this integer value is stored directly and size is set to 0. 862f7dd07eSFinn Thain * A NULL private data pointer indicates an unrecognized resource. 872f7dd07eSFinn Thain */ 882f7dd07eSFinn Thain 892f7dd07eSFinn Thain struct nubus_proc_pde_data { 902f7dd07eSFinn Thain unsigned char *res_ptr; 912f7dd07eSFinn Thain unsigned int res_size; 9211db656aSDavid Howells }; 9311db656aSDavid Howells 942f7dd07eSFinn Thain static struct nubus_proc_pde_data * 952f7dd07eSFinn Thain nubus_proc_alloc_pde_data(unsigned char *ptr, unsigned int size) 961da177e4SLinus Torvalds { 97359745d7SMuchun Song struct nubus_proc_pde_data *pded; 981da177e4SLinus Torvalds 99359745d7SMuchun Song pded = kmalloc(sizeof(*pded), GFP_KERNEL); 100359745d7SMuchun Song if (!pded) 1012f7dd07eSFinn Thain return NULL; 1021da177e4SLinus Torvalds 103359745d7SMuchun Song pded->res_ptr = ptr; 104359745d7SMuchun Song pded->res_size = size; 105359745d7SMuchun Song return pded; 1061da177e4SLinus Torvalds } 1071da177e4SLinus Torvalds 1082f7dd07eSFinn Thain static int nubus_proc_rsrc_show(struct seq_file *m, void *v) 1091da177e4SLinus Torvalds { 1102f7dd07eSFinn Thain struct inode *inode = m->private; 111359745d7SMuchun Song struct nubus_proc_pde_data *pded; 1122f7dd07eSFinn Thain 113359745d7SMuchun Song pded = pde_data(inode); 114359745d7SMuchun Song if (!pded) 1152f7dd07eSFinn Thain return 0; 1162f7dd07eSFinn Thain 117359745d7SMuchun Song if (pded->res_size > m->size) 1182f7dd07eSFinn Thain return -EFBIG; 1192f7dd07eSFinn Thain 120359745d7SMuchun Song if (pded->res_size) { 1212f7dd07eSFinn Thain int lanes = (int)proc_get_parent_data(inode); 1221da177e4SLinus Torvalds struct nubus_dirent ent; 1231da177e4SLinus Torvalds 1242f7dd07eSFinn Thain if (!lanes) 1252f7dd07eSFinn Thain return 0; 1261da177e4SLinus Torvalds 1272f7dd07eSFinn Thain ent.mask = lanes; 128359745d7SMuchun Song ent.base = pded->res_ptr; 1292f7dd07eSFinn Thain ent.data = 0; 130359745d7SMuchun Song nubus_seq_write_rsrc_mem(m, &ent, pded->res_size); 1311da177e4SLinus Torvalds } else { 132359745d7SMuchun Song unsigned int data = (unsigned int)pded->res_ptr; 1332f7dd07eSFinn Thain 1342f7dd07eSFinn Thain seq_putc(m, data >> 16); 1352f7dd07eSFinn Thain seq_putc(m, data >> 8); 1362f7dd07eSFinn Thain seq_putc(m, data >> 0); 1371da177e4SLinus Torvalds } 1382f7dd07eSFinn Thain return 0; 1391da177e4SLinus Torvalds } 1401da177e4SLinus Torvalds 1410e96647cSFinn Thain static int nubus_rsrc_proc_open(struct inode *inode, struct file *file) 1420e96647cSFinn Thain { 1430e96647cSFinn Thain return single_open(file, nubus_proc_rsrc_show, inode); 1440e96647cSFinn Thain } 1450e96647cSFinn Thain 1460e96647cSFinn Thain static const struct proc_ops nubus_rsrc_proc_ops = { 1470e96647cSFinn Thain .proc_open = nubus_rsrc_proc_open, 1480e96647cSFinn Thain .proc_read = seq_read, 1490e96647cSFinn Thain .proc_lseek = seq_lseek, 1500e96647cSFinn Thain .proc_release = single_release, 1510e96647cSFinn Thain }; 1520e96647cSFinn Thain 1532f7dd07eSFinn Thain void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir, 1542f7dd07eSFinn Thain const struct nubus_dirent *ent, 1552f7dd07eSFinn Thain unsigned int size) 1562f7dd07eSFinn Thain { 1572f828fb2SFinn Thain char name[9]; 158359745d7SMuchun Song struct nubus_proc_pde_data *pded; 1591da177e4SLinus Torvalds 1602f7dd07eSFinn Thain if (!procdir) 1612f7dd07eSFinn Thain return; 1622f7dd07eSFinn Thain 1632f7dd07eSFinn Thain snprintf(name, sizeof(name), "%x", ent->type); 1642f7dd07eSFinn Thain if (size) 165359745d7SMuchun Song pded = nubus_proc_alloc_pde_data(nubus_dirptr(ent), size); 1662f7dd07eSFinn Thain else 167359745d7SMuchun Song pded = NULL; 168*b7629ce6SFinn Thain remove_proc_subtree(name, procdir); 1690e96647cSFinn Thain proc_create_data(name, S_IFREG | 0444, procdir, 1700e96647cSFinn Thain &nubus_rsrc_proc_ops, pded); 1711da177e4SLinus Torvalds } 1721da177e4SLinus Torvalds 1732f7dd07eSFinn Thain void nubus_proc_add_rsrc(struct proc_dir_entry *procdir, 1742f7dd07eSFinn Thain const struct nubus_dirent *ent) 1752f7dd07eSFinn Thain { 1762f7dd07eSFinn Thain char name[9]; 1772f7dd07eSFinn Thain unsigned char *data = (unsigned char *)ent->data; 1782f7dd07eSFinn Thain 1792f7dd07eSFinn Thain if (!procdir) 1802f7dd07eSFinn Thain return; 1812f7dd07eSFinn Thain 1822f7dd07eSFinn Thain snprintf(name, sizeof(name), "%x", ent->type); 183*b7629ce6SFinn Thain remove_proc_subtree(name, procdir); 1840e96647cSFinn Thain proc_create_data(name, S_IFREG | 0444, procdir, 1850e96647cSFinn Thain &nubus_rsrc_proc_ops, 1862f7dd07eSFinn Thain nubus_proc_alloc_pde_data(data, 0)); 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds 18911db656aSDavid Howells /* 19011db656aSDavid Howells * /proc/nubus stuff 19111db656aSDavid Howells */ 19211db656aSDavid Howells 1931da177e4SLinus Torvalds void __init nubus_proc_init(void) 1941da177e4SLinus Torvalds { 1953f3942acSChristoph Hellwig proc_create_single("nubus", 0, NULL, nubus_proc_show); 1969c37066dSAlexey Dobriyan proc_bus_nubus_dir = proc_mkdir("bus/nubus", NULL); 1972f7dd07eSFinn Thain if (!proc_bus_nubus_dir) 1982f7dd07eSFinn Thain return; 1993f3942acSChristoph Hellwig proc_create_single("devices", 0, proc_bus_nubus_dir, 2003f3942acSChristoph Hellwig nubus_devices_proc_show); 2011da177e4SLinus Torvalds } 202