[PATCH v4 10/14] nubus: Rework /proc/bus/nubus/s/ implementation

From: Finn Thain
Date: Wed Dec 13 2017 - 22:17:31 EST

The /proc/bus/nubus/s/ directory tree for any slot s is missing a lot
of information. The struct file_operations methods have long been left
unimplemented (hence the familiar compile-time warning, "Need to set
some I/O handlers here").

Slot resources have a complex structure which varies depending on board
function. The logic for interpreting these ROM data structures is found
in nubus.c. Let's not duplicate that logic in proc.c.

Create the /proc/bus/nubus/s/ inodes while scanning slot s. During
descent through slot resource subdirectories, call the new
nubus_proc_add_foo() functions to create the procfs inodes.

Also add a new function, nubus_seq_write_rsrc_mem(), to write the
contents of a particular slot resource to a given seq_file. This is
used by the procfs file_operations methods, to finally give userspace
access to slot ROM information, such as the available video modes.

Tested-by: Stan Johnson <userm57@xxxxxxxxx>
Signed-off-by: Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx>
---
drivers/nubus/nubus.c | 118 ++++++++++++++++++++------
drivers/nubus/proc.c | 223 ++++++++++++++++++++++++++++++--------------------
include/linux/nubus.h | 37 ++++++++-
3 files changed, 259 insertions(+), 119 deletions(-)

diff --git a/drivers/nubus/nubus.c b/drivers/nubus/nubus.c
index a7b480534a17..b0d8aa721173 100644
--- a/drivers/nubus/nubus.c
+++ b/drivers/nubus/nubus.c
@@ -15,6 +15,7 @@
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/seq_file.h>
#include <linux/slab.h>
#include <asm/setup.h>
#include <asm/page.h>
@@ -146,7 +147,7 @@ static inline void *nubus_rom_addr(int slot)
return (void *)(0xF1000000 + (slot << 24));
}

-static unsigned char *nubus_dirptr(const struct nubus_dirent *nd)
+unsigned char *nubus_dirptr(const struct nubus_dirent *nd)
{
unsigned char *p = nd->base;

@@ -173,8 +174,8 @@ void nubus_get_rsrc_mem(void *dest, const struct nubus_dirent *dirent,
}
EXPORT_SYMBOL(nubus_get_rsrc_mem);

-void nubus_get_rsrc_str(char *dest, const struct nubus_dirent *dirent,
- unsigned int len)
+unsigned int nubus_get_rsrc_str(char *dest, const struct nubus_dirent *dirent,
+ unsigned int len)
{
char *t = dest;
unsigned char *p = nubus_dirptr(dirent);
@@ -189,9 +190,33 @@ void nubus_get_rsrc_str(char *dest, const struct nubus_dirent *dirent,
}
if (len > 0)
*t = '\0';
+ return t - dest;
}
EXPORT_SYMBOL(nubus_get_rsrc_str);

+void nubus_seq_write_rsrc_mem(struct seq_file *m,
+ const struct nubus_dirent *dirent,
+ unsigned int len)
+{
+ unsigned long buf[32];
+ unsigned int buf_size = sizeof(buf);
+ unsigned char *p = nubus_dirptr(dirent);
+
+ /* If possible, write out full buffers */
+ while (len >= buf_size) {
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(buf); i++)
+ buf[i] = nubus_get_rom(&p, sizeof(buf[0]),
+ dirent->mask);
+ seq_write(m, buf, buf_size);
+ len -= buf_size;
+ }
+ /* If not, write out individual bytes */
+ while (len--)
+ seq_putc(m, nubus_get_rom(&p, 1, dirent->mask));
+}
+
int nubus_get_root_dir(const struct nubus_board *board,
struct nubus_dir *dir)
{
@@ -326,35 +351,35 @@ EXPORT_SYMBOL(nubus_find_rsrc);
looking at, and print out lots and lots of information from the
resource blocks. */

-/* FIXME: A lot of this stuff will eventually be useful after
- initialization, for intelligently probing Ethernet and video chips,
- among other things. The rest of it should go in the /proc code.
- For now, we just use it to give verbose boot logs. */
-
static int __init nubus_get_block_rsrc_dir(struct nubus_board *board,
+ struct proc_dir_entry *procdir,
const struct nubus_dirent *parent)
{
struct nubus_dir dir;
struct nubus_dirent ent;

nubus_get_subdir(parent, &dir);
+ dir.procdir = nubus_proc_add_rsrc_dir(procdir, parent, board);

while (nubus_readdir(&dir, &ent) != -1) {
u32 size;

nubus_get_rsrc_mem(&size, &ent, 4);
pr_debug(" block (0x%x), size %d\n", ent.type, size);
+ nubus_proc_add_rsrc_mem(dir.procdir, &ent, size);
}
return 0;
}

static int __init nubus_get_display_vidmode(struct nubus_board *board,
+ struct proc_dir_entry *procdir,
const struct nubus_dirent *parent)
{
struct nubus_dir dir;
struct nubus_dirent ent;

nubus_get_subdir(parent, &dir);
+ dir.procdir = nubus_proc_add_rsrc_dir(procdir, parent, board);

while (nubus_readdir(&dir, &ent) != -1) {
switch (ent.type) {
@@ -366,37 +391,42 @@ static int __init nubus_get_display_vidmode(struct nubus_board *board,
nubus_get_rsrc_mem(&size, &ent, 4);
pr_debug(" block (0x%x), size %d\n", ent.type,
size);
+ nubus_proc_add_rsrc_mem(dir.procdir, &ent, size);
break;
}
default:
pr_debug(" unknown resource 0x%02x, data 0x%06x\n",
ent.type, ent.data);
+ nubus_proc_add_rsrc_mem(dir.procdir, &ent, 0);
}
}
return 0;
}

static int __init nubus_get_display_resource(struct nubus_dev *dev,
+ struct proc_dir_entry *procdir,
const struct nubus_dirent *ent)
{
switch (ent->type) {
case NUBUS_RESID_GAMMADIR:
pr_debug(" gamma directory offset: 0x%06x\n", ent->data);
- nubus_get_block_rsrc_dir(dev->board, ent);
+ nubus_get_block_rsrc_dir(dev->board, procdir, ent);
break;
case 0x0080 ... 0x0085:
pr_debug(" mode 0x%02x info offset: 0x%06x\n",
ent->type, ent->data);
- nubus_get_display_vidmode(dev->board, ent);
+ nubus_get_display_vidmode(dev->board, procdir, ent);
break;
default:
pr_debug(" unknown resource 0x%02x, data 0x%06x\n",
ent->type, ent->data);
+ nubus_proc_add_rsrc_mem(procdir, ent, 0);
}
return 0;
}

static int __init nubus_get_network_resource(struct nubus_dev *dev,
+ struct proc_dir_entry *procdir,
const struct nubus_dirent *ent)
{
switch (ent->type) {
@@ -406,16 +436,19 @@ static int __init nubus_get_network_resource(struct nubus_dev *dev,

nubus_get_rsrc_mem(addr, ent, 6);
pr_debug(" MAC address: %pM\n", addr);
+ nubus_proc_add_rsrc_mem(procdir, ent, 6);
break;
}
default:
pr_debug(" unknown resource 0x%02x, data 0x%06x\n",
ent->type, ent->data);
+ nubus_proc_add_rsrc_mem(procdir, ent, 0);
}
return 0;
}

static int __init nubus_get_cpu_resource(struct nubus_dev *dev,
+ struct proc_dir_entry *procdir,
const struct nubus_dirent *ent)
{
switch (ent->type) {
@@ -426,6 +459,7 @@ static int __init nubus_get_cpu_resource(struct nubus_dev *dev,
nubus_get_rsrc_mem(&meminfo, ent, 8);
pr_debug(" memory: [ 0x%08lx 0x%08lx ]\n",
meminfo[0], meminfo[1]);
+ nubus_proc_add_rsrc_mem(procdir, ent, 8);
break;
}
case NUBUS_RESID_ROMINFO:
@@ -435,31 +469,35 @@ static int __init nubus_get_cpu_resource(struct nubus_dev *dev,
nubus_get_rsrc_mem(&rominfo, ent, 8);
pr_debug(" ROM: [ 0x%08lx 0x%08lx ]\n",
rominfo[0], rominfo[1]);
+ nubus_proc_add_rsrc_mem(procdir, ent, 8);
break;
}
default:
pr_debug(" unknown resource 0x%02x, data 0x%06x\n",
ent->type, ent->data);
+ nubus_proc_add_rsrc_mem(procdir, ent, 0);
}
return 0;
}

static int __init nubus_get_private_resource(struct nubus_dev *dev,
+ struct proc_dir_entry *procdir,
const struct nubus_dirent *ent)
{
switch (dev->category) {
case NUBUS_CAT_DISPLAY:
- nubus_get_display_resource(dev, ent);
+ nubus_get_display_resource(dev, procdir, ent);
break;
case NUBUS_CAT_NETWORK:
- nubus_get_network_resource(dev, ent);
+ nubus_get_network_resource(dev, procdir, ent);
break;
case NUBUS_CAT_CPU:
- nubus_get_cpu_resource(dev, ent);
+ nubus_get_cpu_resource(dev, procdir, ent);
break;
default:
pr_debug(" unknown resource 0x%02x, data 0x%06x\n",
ent->type, ent->data);
+ nubus_proc_add_rsrc_mem(procdir, ent, 0);
}
return 0;
}
@@ -474,6 +512,7 @@ nubus_get_functional_resource(struct nubus_board *board, int slot,

pr_debug(" Functional resource 0x%02x:\n", parent->type);
nubus_get_subdir(parent, &dir);
+ dir.procdir = nubus_proc_add_rsrc_dir(board->procdir, parent, board);

/* Actually we should probably panic if this fails */
if ((dev = kzalloc(sizeof(*dev), GFP_ATOMIC)) == NULL)
@@ -495,14 +534,17 @@ nubus_get_functional_resource(struct nubus_board *board, int slot,
dev->dr_hw = nbtdata[3];
pr_debug(" type: [cat 0x%x type 0x%x sw 0x%x hw 0x%x]\n",
nbtdata[0], nbtdata[1], nbtdata[2], nbtdata[3]);
+ nubus_proc_add_rsrc_mem(dir.procdir, &ent, 8);
break;
}
case NUBUS_RESID_NAME:
{
char name[64];
+ unsigned int len;

- nubus_get_rsrc_str(name, &ent, sizeof(name));
+ len = nubus_get_rsrc_str(name, &ent, sizeof(name));
pr_debug(" name: %s\n", name);
+ nubus_proc_add_rsrc_mem(dir.procdir, &ent, len + 1);
break;
}
case NUBUS_RESID_DRVRDIR:
@@ -511,7 +553,7 @@ nubus_get_functional_resource(struct nubus_board *board, int slot,
use this :-) */
pr_debug(" driver directory offset: 0x%06x\n",
ent.data);
- nubus_get_block_rsrc_dir(board, &ent);
+ nubus_get_block_rsrc_dir(board, dir.procdir, &ent);
break;
}
case NUBUS_RESID_MINOR_BASEOS:
@@ -523,6 +565,7 @@ nubus_get_functional_resource(struct nubus_board *board, int slot,

nubus_get_rsrc_mem(&base_offset, &ent, 4);
pr_debug(" memory offset: 0x%08x\n", base_offset);
+ nubus_proc_add_rsrc_mem(dir.procdir, &ent, 4);
break;
}
case NUBUS_RESID_MINOR_LENGTH:
@@ -532,18 +575,21 @@ nubus_get_functional_resource(struct nubus_board *board, int slot,

nubus_get_rsrc_mem(&length, &ent, 4);
pr_debug(" memory length: 0x%08x\n", length);
+ nubus_proc_add_rsrc_mem(dir.procdir, &ent, 4);
break;
}
case NUBUS_RESID_FLAGS:
pr_debug(" flags: 0x%06x\n", ent.data);
+ nubus_proc_add_rsrc(dir.procdir, &ent);
break;
case NUBUS_RESID_HWDEVID:
pr_debug(" hwdevid: 0x%06x\n", ent.data);
+ nubus_proc_add_rsrc(dir.procdir, &ent);
break;
default:
/* Local/Private resources have their own
function */
- nubus_get_private_resource(dev, &ent);
+ nubus_get_private_resource(dev, dir.procdir, &ent);
}
}

@@ -552,7 +598,8 @@ nubus_get_functional_resource(struct nubus_board *board, int slot,

/* This is *really* cool. */
static int __init nubus_get_icon(struct nubus_board *board,
- const struct nubus_dirent *ent)
+ struct proc_dir_entry *procdir,
+ const struct nubus_dirent *ent)
{
/* Should be 32x32 if my memory serves me correctly */
u32 icon[32];
@@ -564,12 +611,14 @@ static int __init nubus_get_icon(struct nubus_board *board,
pr_debug(" %08x %08x %08x %08x\n",
icon[i * 4 + 0], icon[i * 4 + 1],
icon[i * 4 + 2], icon[i * 4 + 3]);
+ nubus_proc_add_rsrc_mem(procdir, ent, 128);

return 0;
}

static int __init nubus_get_vendorinfo(struct nubus_board *board,
- const struct nubus_dirent *parent)
+ struct proc_dir_entry *procdir,
+ const struct nubus_dirent *parent)
{
struct nubus_dir dir;
struct nubus_dirent ent;
@@ -578,15 +627,18 @@ static int __init nubus_get_vendorinfo(struct nubus_board *board,

pr_debug(" vendor info:\n");
nubus_get_subdir(parent, &dir);
+ dir.procdir = nubus_proc_add_rsrc_dir(procdir, parent, board);

while (nubus_readdir(&dir, &ent) != -1) {
char name[64];
+ unsigned int len;

/* These are all strings, we think */
- nubus_get_rsrc_str(name, &ent, sizeof(name));
+ len = nubus_get_rsrc_str(name, &ent, sizeof(name));
if (ent.type < 1 || ent.type > 5)
ent.type = 5;
pr_debug(" %s: %s\n", vendor_fields[ent.type - 1], name);
+ nubus_proc_add_rsrc_mem(dir.procdir, &ent, len + 1);
}
return 0;
}
@@ -599,6 +651,7 @@ static int __init nubus_get_board_resource(struct nubus_board *board, int slot,

pr_debug(" Board resource 0x%02x:\n", parent->type);
nubus_get_subdir(parent, &dir);
+ dir.procdir = nubus_proc_add_rsrc_dir(board->procdir, parent, board);

while (nubus_readdir(&dir, &ent) != -1) {
switch (ent.type) {
@@ -614,48 +667,61 @@ static int __init nubus_get_board_resource(struct nubus_board *board, int slot,
if (nbtdata[0] != 1 || nbtdata[1] != 0 ||
nbtdata[2] != 0 || nbtdata[3] != 0)
pr_err("Slot %X: sResource is not a board resource!\n", slot);
+ nubus_proc_add_rsrc_mem(dir.procdir, &ent, 8);
break;
}
case NUBUS_RESID_NAME:
- nubus_get_rsrc_str(board->name, &ent,
- sizeof(board->name));
+ {
+ unsigned int len;
+
+ len = nubus_get_rsrc_str(board->name, &ent,
+ sizeof(board->name));
pr_debug(" name: %s\n", board->name);
+ nubus_proc_add_rsrc_mem(dir.procdir, &ent, len + 1);
break;
+ }
case NUBUS_RESID_ICON:
- nubus_get_icon(board, &ent);
+ nubus_get_icon(board, dir.procdir, &ent);
break;
case NUBUS_RESID_BOARDID:
pr_debug(" board id: 0x%x\n", ent.data);
+ nubus_proc_add_rsrc(dir.procdir, &ent);
break;
case NUBUS_RESID_PRIMARYINIT:
pr_debug(" primary init offset: 0x%06x\n", ent.data);
+ nubus_proc_add_rsrc(dir.procdir, &ent);
break;
case NUBUS_RESID_VENDORINFO:
- nubus_get_vendorinfo(board, &ent);
+ nubus_get_vendorinfo(board, dir.procdir, &ent);
break;
case NUBUS_RESID_FLAGS:
pr_debug(" flags: 0x%06x\n", ent.data);
+ nubus_proc_add_rsrc(dir.procdir, &ent);
break;
case NUBUS_RESID_HWDEVID:
pr_debug(" hwdevid: 0x%06x\n", ent.data);
+ nubus_proc_add_rsrc(dir.procdir, &ent);
break;
case NUBUS_RESID_SECONDINIT:
pr_debug(" secondary init offset: 0x%06x\n", ent.data);
+ nubus_proc_add_rsrc(dir.procdir, &ent);
break;
/* WTF isn't this in the functional resources? */
case NUBUS_RESID_VIDNAMES:
pr_debug(" vidnames directory offset: 0x%06x\n",
ent.data);
- nubus_get_block_rsrc_dir(board, &ent);
+ nubus_get_block_rsrc_dir(board, dir.procdir, &ent);
break;
/* Same goes for this */
case NUBUS_RESID_VIDMODES:
pr_debug(" video mode parameter directory offset: 0x%06x\n",
ent.data);
+ nubus_proc_add_rsrc(dir.procdir, &ent);
break;
default:
pr_debug(" unknown resource 0x%02x, data 0x%06x\n",
ent.type, ent.data);
+ nubus_proc_add_rsrc_mem(dir.procdir, &ent, 0);
}
}
return 0;
@@ -746,6 +812,8 @@ static struct nubus_board * __init nubus_add_board(int slot, int bytelanes)
if (ent.type < 1 || ent.type > 127)
pr_warn("Slot %X: Board resource ID is invalid!\n", slot);

+ board->procdir = nubus_proc_add_board(board);
+
nubus_get_board_resource(board, slot, &ent);

while (nubus_readdir(&dir, &ent) != -1) {
@@ -833,8 +901,8 @@ static int __init nubus_init(void)
if (!MACH_IS_MAC)
return 0;

- nubus_scan_bus();
nubus_proc_init();
+ nubus_scan_bus();
return 0;
}

diff --git a/drivers/nubus/proc.c b/drivers/nubus/proc.c
index 41ec859bdd8b..ad8b0648a6c0 100644
--- a/drivers/nubus/proc.c
+++ b/drivers/nubus/proc.c
@@ -11,24 +11,28 @@
structure in /proc analogous to the structure of the NuBus ROM
resources.

- Therefore each NuBus device is in fact a directory, which may in
- turn contain subdirectories. The "files" correspond to NuBus
- resource records. For those types of records which we know how to
- convert to formats that are meaningful to userspace (mostly just
- icons) these files will provide "cooked" data. Otherwise they will
- simply provide raw access (read-only of course) to the ROM. */
+ Therefore each board function gets a directory, which may in turn
+ contain subdirectories. Each slot resource is a file. Unrecognized
+ resources are empty files, since every resource ID requires a special
+ case (e.g. if the resource ID implies a directory or block, then its
+ value has to be interpreted as a slot ROM pointer etc.).
+ */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/nubus.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
+#include <linux/slab.h>
#include <linux/init.h>
#include <linux/module.h>
-
#include <linux/uaccess.h>
#include <asm/byteorder.h>

+/*
+ * /proc/bus/nubus/devices stuff
+ */
+
static int
nubus_devices_proc_show(struct seq_file *m, void *v)
{
@@ -61,96 +65,142 @@ static const struct file_operations nubus_devices_proc_fops = {

static struct proc_dir_entry *proc_bus_nubus_dir;

-static const struct file_operations nubus_proc_subdir_fops = {
-#warning Need to set some I/O handlers here
+/*
+ * /proc/bus/nubus/x/ stuff
+ */
+
+struct proc_dir_entry *nubus_proc_add_board(struct nubus_board *board)
+{
+ char name[2];
+
+ if (!proc_bus_nubus_dir)
+ return NULL;
+ snprintf(name, sizeof(name), "%x", board->slot);
+ return proc_mkdir(name, proc_bus_nubus_dir);
+}
+
+/* The PDE private data for any directory under /proc/bus/nubus/x/
+ * is the bytelanes value for the board in slot x.
+ */
+
+struct proc_dir_entry *nubus_proc_add_rsrc_dir(struct proc_dir_entry *procdir,
+ const struct nubus_dirent *ent,
+ struct nubus_board *board)
+{
+ char name[9];
+ int lanes = board->lanes;
+
+ if (!procdir)
+ return NULL;
+ snprintf(name, sizeof(name), "%x", ent->type);
+ return proc_mkdir_data(name, S_IRUGO | S_IXUGO, procdir,
+ (void *)lanes);
+}
+
+/* The PDE private data for a file under /proc/bus/nubus/x/ is a pointer to
+ * an instance of the following structure, which gives the location and size
+ * of the resource data in the slot ROM. For slot resources which hold only a
+ * small integer, this integer value is stored directly and size is set to 0.
+ * A NULL private data pointer indicates an unrecognized resource.
+ */
+
+struct nubus_proc_pde_data {
+ unsigned char *res_ptr;
+ unsigned int res_size;
};

-static void nubus_proc_subdir(struct nubus_dev* dev,
- struct proc_dir_entry* parent,
- struct nubus_dir* dir)
+static struct nubus_proc_pde_data *
+nubus_proc_alloc_pde_data(unsigned char *ptr, unsigned int size)
{
- struct nubus_dirent ent;
-
- /* Some of these are directories, others aren't */
- while (nubus_readdir(dir, &ent) != -1) {
- char name[9];
- struct proc_dir_entry* e;
-
- snprintf(name, sizeof(name), "%x", ent.type);
- e = proc_create(name, S_IFREG | S_IRUGO | S_IWUSR, parent,
- &nubus_proc_subdir_fops);
- if (!e)
- return;
- }
+ struct nubus_proc_pde_data *pde_data;
+
+ pde_data = kmalloc(sizeof(*pde_data), GFP_KERNEL);
+ if (!pde_data)
+ return NULL;
+
+ pde_data->res_ptr = ptr;
+ pde_data->res_size = size;
+ return pde_data;
}

-/* Can't do this recursively since the root directory is structured
- somewhat differently from the subdirectories */
-static void nubus_proc_populate(struct nubus_dev* dev,
- struct proc_dir_entry* parent,
- struct nubus_dir* root)
+static int nubus_proc_rsrc_show(struct seq_file *m, void *v)
{
- struct nubus_dirent ent;
-
- /* We know these are all directories (board resource + one or
- more functional resources) */
- while (nubus_readdir(root, &ent) != -1) {
- char name[9];
- struct proc_dir_entry* e;
- struct nubus_dir dir;
-
- snprintf(name, sizeof(name), "%x", ent.type);
- e = proc_mkdir(name, parent);
- if (!e) return;
-
- /* And descend */
- if (nubus_get_subdir(&ent, &dir) == -1) {
- /* This shouldn't happen */
- printk(KERN_ERR "NuBus root directory node %x:%x has no subdir!\n",
- dev->board->slot, ent.type);
- continue;
- } else {
- nubus_proc_subdir(dev, e, &dir);
- }
+ struct inode *inode = m->private;
+ struct nubus_proc_pde_data *pde_data;
+
+ pde_data = PDE_DATA(inode);
+ if (!pde_data)
+ return 0;
+
+ if (pde_data->res_size > m->size)
+ return -EFBIG;
+
+ if (pde_data->res_size) {
+ int lanes = (int)proc_get_parent_data(inode);
+ struct nubus_dirent ent;
+
+ if (!lanes)
+ return 0;
+
+ ent.mask = lanes;
+ ent.base = pde_data->res_ptr;
+ ent.data = 0;
+ nubus_seq_write_rsrc_mem(m, &ent, pde_data->res_size);
+ } else {
+ unsigned int data = (unsigned int)pde_data->res_ptr;
+
+ seq_putc(m, data >> 16);
+ seq_putc(m, data >> 8);
+ seq_putc(m, data >> 0);
}
+ return 0;
}

-int nubus_proc_attach_device(struct nubus_dev *dev)
+static int nubus_proc_rsrc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, nubus_proc_rsrc_show, inode);
+}
+
+static const struct file_operations nubus_proc_rsrc_fops = {
+ .open = nubus_proc_rsrc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir,
+ const struct nubus_dirent *ent,
+ unsigned int size)
{
- struct proc_dir_entry *e;
- struct nubus_dir root;
char name[9];
+ struct nubus_proc_pde_data *pde_data;

- if (dev == NULL) {
- printk(KERN_ERR
- "NULL pointer in nubus_proc_attach_device, shoot the programmer!\n");
- return -1;
- }
-
- if (dev->board == NULL) {
- printk(KERN_ERR
- "NULL pointer in nubus_proc_attach_device, shoot the programmer!\n");
- printk("dev = %p, dev->board = %p\n", dev, dev->board);
- return -1;
- }
-
- if (dev->board->procdir)
- return 0;
+ if (!procdir)
+ return;

- /* Create a directory */
- snprintf(name, sizeof(name), "%x", dev->board->slot);
- e = proc_mkdir(name, proc_bus_nubus_dir);
- dev->board->procdir = e;
- if (!e)
- return -ENOMEM;
+ snprintf(name, sizeof(name), "%x", ent->type);
+ if (size)
+ pde_data = nubus_proc_alloc_pde_data(nubus_dirptr(ent), size);
+ else
+ pde_data = NULL;
+ proc_create_data(name, S_IFREG | S_IRUGO, procdir,
+ &nubus_proc_rsrc_fops, pde_data);
+}

- /* Now recursively populate it with files */
- nubus_get_root_dir(dev->board, &root);
- nubus_proc_populate(dev, e, &root);
+void nubus_proc_add_rsrc(struct proc_dir_entry *procdir,
+ const struct nubus_dirent *ent)
+{
+ char name[9];
+ unsigned char *data = (unsigned char *)ent->data;

- return 0;
+ if (!procdir)
+ return;
+
+ snprintf(name, sizeof(name), "%x", ent->type);
+ proc_create_data(name, S_IFREG | S_IRUGO, procdir,
+ &nubus_proc_rsrc_fops,
+ nubus_proc_alloc_pde_data(data, 0));
}
-EXPORT_SYMBOL(nubus_proc_attach_device);

/*
* /proc/nubus stuff
@@ -219,18 +269,11 @@ static const struct file_operations nubus_proc_fops = {
.release = seq_release,
};

-void __init proc_bus_nubus_add_devices(void)
-{
- struct nubus_dev *dev;
-
- for(dev = nubus_devices; dev; dev = dev->next)
- nubus_proc_attach_device(dev);
-}
-
void __init nubus_proc_init(void)
{
proc_create("nubus", 0, NULL, &nubus_proc_fops);
proc_bus_nubus_dir = proc_mkdir("bus/nubus", NULL);
+ if (!proc_bus_nubus_dir)
+ return;
proc_create("devices", 0, proc_bus_nubus_dir, &nubus_devices_proc_fops);
- proc_bus_nubus_add_devices();
}
diff --git a/include/linux/nubus.h b/include/linux/nubus.h
index 84f2e0fa1898..0e40c9d6b977 100644
--- a/include/linux/nubus.h
+++ b/include/linux/nubus.h
@@ -13,11 +13,15 @@
#include <asm/nubus.h>
#include <uapi/linux/nubus.h>

+struct proc_dir_entry;
+struct seq_file;
+
struct nubus_dir {
unsigned char *base;
unsigned char *ptr;
int done;
int mask;
+ struct proc_dir_entry *procdir;
};

struct nubus_dirent {
@@ -84,12 +88,33 @@ extern struct nubus_board *nubus_boards;

/* Generic NuBus interface functions, modelled after the PCI interface */
#ifdef CONFIG_PROC_FS
-extern void nubus_proc_init(void);
+void nubus_proc_init(void);
+struct proc_dir_entry *nubus_proc_add_board(struct nubus_board *board);
+struct proc_dir_entry *nubus_proc_add_rsrc_dir(struct proc_dir_entry *procdir,
+ const struct nubus_dirent *ent,
+ struct nubus_board *board);
+void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir,
+ const struct nubus_dirent *ent,
+ unsigned int size);
+void nubus_proc_add_rsrc(struct proc_dir_entry *procdir,
+ const struct nubus_dirent *ent);
#else
static inline void nubus_proc_init(void) {}
+static inline
+struct proc_dir_entry *nubus_proc_add_board(struct nubus_board *board)
+{ return NULL; }
+static inline
+struct proc_dir_entry *nubus_proc_add_rsrc_dir(struct proc_dir_entry *procdir,
+ const struct nubus_dirent *ent,
+ struct nubus_board *board)
+{ return NULL; }
+static inline void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir,
+ const struct nubus_dirent *ent,
+ unsigned int size) {}
+static inline void nubus_proc_add_rsrc(struct proc_dir_entry *procdir,
+ const struct nubus_dirent *ent) {}
#endif

-int nubus_proc_attach_device(struct nubus_dev *dev);
/* If we need more precision we can add some more of these */
struct nubus_dev *nubus_find_type(unsigned short category,
unsigned short type,
@@ -125,8 +150,12 @@ int nubus_get_subdir(const struct nubus_dirent *ent,
struct nubus_dir *dir);
void nubus_get_rsrc_mem(void *dest, const struct nubus_dirent *dirent,
unsigned int len);
-void nubus_get_rsrc_str(char *dest, const struct nubus_dirent *dirent,
- unsigned int maxlen);
+unsigned int nubus_get_rsrc_str(char *dest, const struct nubus_dirent *dirent,
+ unsigned int len);
+void nubus_seq_write_rsrc_mem(struct seq_file *m,
+ const struct nubus_dirent *dirent,
+ unsigned int len);
+unsigned char *nubus_dirptr(const struct nubus_dirent *nd);

/* Returns a pointer to the "standard" slot space. */
static inline void *nubus_slot_addr(int slot)
--
2.13.6