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
nubus_devices_proc_show(struct seq_file * m,void * v)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
nubus_proc_add_board(struct nubus_board * board)542f7dd07eSFinn Thain struct proc_dir_entry *nubus_proc_add_board(struct nubus_board *board)
552f7dd07eSFinn Thain {
562f7dd07eSFinn Thain char name[2];
572f7dd07eSFinn Thain
58*72b44f65SFinn Thain if (!proc_bus_nubus_dir || !nubus_populate_procfs)
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
nubus_proc_add_rsrc_dir(struct proc_dir_entry * procdir,const struct nubus_dirent * ent,struct nubus_board * board)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
75*72b44f65SFinn Thain if (!procdir || !nubus_populate_procfs)
762f7dd07eSFinn Thain return NULL;
772f7dd07eSFinn Thain snprintf(name, sizeof(name), "%x", ent->type);
78b7629ce6SFinn 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 *
nubus_proc_alloc_pde_data(unsigned char * ptr,unsigned int size)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
nubus_proc_rsrc_show(struct seq_file * m,void * v)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
nubus_rsrc_proc_open(struct inode * inode,struct file * file)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
nubus_proc_add_rsrc_mem(struct proc_dir_entry * procdir,const struct nubus_dirent * ent,unsigned int size)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
160*72b44f65SFinn Thain if (!procdir || !nubus_populate_procfs)
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;
168b7629ce6SFinn 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
nubus_proc_add_rsrc(struct proc_dir_entry * procdir,const struct nubus_dirent * ent)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
179*72b44f65SFinn Thain if (!procdir || !nubus_populate_procfs)
1802f7dd07eSFinn Thain return;
1812f7dd07eSFinn Thain
1822f7dd07eSFinn Thain snprintf(name, sizeof(name), "%x", ent->type);
183b7629ce6SFinn 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
nubus_proc_init(void)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