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linux/drivers/parisc/eisa_enumerator.c
Linus Torvalds bf4afc53b7 Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 
This was done entirely with mindless brute force, using

    git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
        xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'

to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.

Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.

For the same reason the 'flex' versions will be done as a separate
conversion.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2026-02-21 17:09:51 -08:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* eisa_enumerator.c - provide support for EISA adapters in PA-RISC machines
*
* Copyright (c) 2002 Daniel Engstrom <5116@telia.com>
*/
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <linux/uaccess.h>
#include <asm/byteorder.h>
#include <asm/eisa_bus.h>
#include <asm/eisa_eeprom.h>
/*
* Todo:
*
* PORT init with MASK attr and other size than byte
* MEMORY with other decode than 20 bit
* CRC stuff
* FREEFORM stuff
*/
#define EPI 0xc80
#define NUM_SLOT 16
#define SLOT2PORT(x) (x<<12)
/* macros to handle unaligned accesses and
* byte swapping. The data in the EEPROM is
* little-endian on the big-endian PAROSC */
#define get_8(x) (*(u_int8_t*)(x))
static inline u_int16_t get_16(const unsigned char *x)
{
return (x[1] << 8) | x[0];
}
static inline u_int32_t get_32(const unsigned char *x)
{
return (x[3] << 24) | (x[2] << 16) | (x[1] << 8) | x[0];
}
static inline u_int32_t get_24(const unsigned char *x)
{
return (x[2] << 24) | (x[1] << 16) | (x[0] << 8);
}
static void print_eisa_id(char *s, u_int32_t id)
{
char vendor[4];
int rev;
int device;
rev = id & 0xff;
id >>= 8;
device = id & 0xff;
id >>= 8;
vendor[3] = '\0';
vendor[2] = '@' + (id & 0x1f);
id >>= 5;
vendor[1] = '@' + (id & 0x1f);
id >>= 5;
vendor[0] = '@' + (id & 0x1f);
id >>= 5;
sprintf(s, "%s%02X%02X", vendor, device, rev);
}
static int configure_memory(const unsigned char *buf,
struct resource *mem_parent,
char *name)
{
int len;
u_int8_t c;
int i;
struct resource *res;
len=0;
for (i=0;i<HPEE_MEMORY_MAX_ENT;i++) {
c = get_8(buf+len);
if (NULL != (res = kzalloc_obj(struct resource))) {
int result;
res->name = name;
res->start = mem_parent->start + get_24(buf+len+2);
res->end = res->start + get_16(buf+len+5)*1024;
res->flags = IORESOURCE_MEM;
pr_cont("memory %pR ", res);
result = request_resource(mem_parent, res);
if (result < 0) {
printk(KERN_ERR "EISA Enumerator: failed to claim EISA Bus address space!\n");
return result;
}
}
len+=7;
if (!(c & HPEE_MEMORY_MORE)) {
break;
}
}
return len;
}
static int configure_irq(const unsigned char *buf)
{
int len;
u_int8_t c;
int i;
len=0;
for (i=0;i<HPEE_IRQ_MAX_ENT;i++) {
c = get_8(buf+len);
pr_cont("IRQ %d ", c & HPEE_IRQ_CHANNEL_MASK);
if (c & HPEE_IRQ_TRIG_LEVEL) {
eisa_make_irq_level(c & HPEE_IRQ_CHANNEL_MASK);
} else {
eisa_make_irq_edge(c & HPEE_IRQ_CHANNEL_MASK);
}
len+=2;
/* hpux seems to allow for
* two bytes of irq data but only defines one of
* them, I think */
if (!(c & HPEE_IRQ_MORE)) {
break;
}
}
return len;
}
static int configure_dma(const unsigned char *buf)
{
int len;
u_int8_t c;
int i;
len=0;
for (i=0;i<HPEE_DMA_MAX_ENT;i++) {
c = get_8(buf+len);
pr_cont("DMA %d ", c&HPEE_DMA_CHANNEL_MASK);
/* fixme: maybe initialize the dma channel withthe timing ? */
len+=2;
if (!(c & HPEE_DMA_MORE)) {
break;
}
}
return len;
}
static int configure_port(const unsigned char *buf, struct resource *io_parent,
char *board)
{
int len;
u_int8_t c;
int i;
struct resource *res;
int result;
len=0;
for (i=0;i<HPEE_PORT_MAX_ENT;i++) {
c = get_8(buf+len);
if (NULL != (res = kzalloc_obj(struct resource))) {
res->name = board;
res->start = get_16(buf+len+1);
res->end = get_16(buf+len+1)+(c&HPEE_PORT_SIZE_MASK)+1;
res->flags = IORESOURCE_IO;
pr_cont("ioports %pR ", res);
result = request_resource(io_parent, res);
if (result < 0) {
printk(KERN_ERR "EISA Enumerator: failed to claim EISA Bus address space!\n");
return result;
}
}
len+=3;
if (!(c & HPEE_PORT_MORE)) {
break;
}
}
return len;
}
/* byte 1 and 2 is the port number to write
* and at byte 3 the value to write starts.
* I assume that there are and- and or- masks
* here when HPEE_PORT_INIT_MASK is set but I have
* not yet encountered this. */
static int configure_port_init(const unsigned char *buf)
{
int len=0;
u_int8_t c;
while (len<HPEE_PORT_INIT_MAX_LEN) {
int s=0;
c = get_8(buf+len);
switch (c & HPEE_PORT_INIT_WIDTH_MASK) {
case HPEE_PORT_INIT_WIDTH_BYTE:
s=1;
if (c & HPEE_PORT_INIT_MASK) {
printk(KERN_WARNING "port_init: unverified mask attribute\n");
outb((inb(get_16(buf+len+1) &
get_8(buf+len+3)) |
get_8(buf+len+4)), get_16(buf+len+1));
} else {
outb(get_8(buf+len+3), get_16(buf+len+1));
}
break;
case HPEE_PORT_INIT_WIDTH_WORD:
s=2;
if (c & HPEE_PORT_INIT_MASK) {
printk(KERN_WARNING "port_init: unverified mask attribute\n");
outw((inw(get_16(buf+len+1)) &
get_16(buf+len+3)) |
get_16(buf+len+5),
get_16(buf+len+1));
} else {
outw(cpu_to_le16(get_16(buf+len+3)), get_16(buf+len+1));
}
break;
case HPEE_PORT_INIT_WIDTH_DWORD:
s=4;
if (c & HPEE_PORT_INIT_MASK) {
printk(KERN_WARNING "port_init: unverified mask attribute\n");
outl((inl(get_16(buf+len+1) &
get_32(buf+len+3)) |
get_32(buf+len+7)), get_16(buf+len+1));
} else {
outl(cpu_to_le32(get_32(buf+len+3)), get_16(buf+len+1));
}
break;
default:
printk(KERN_ERR "Invalid port init word %02x\n", c);
return 0;
}
if (c & HPEE_PORT_INIT_MASK) {
s*=2;
}
len+=s+3;
if (!(c & HPEE_PORT_INIT_MORE)) {
break;
}
}
return len;
}
static int configure_choise(const unsigned char *buf, u_int8_t *info)
{
int len;
/* theis record contain the value of the functions
* configuration choises and an info byte which
* describes which other records to expect in this
* function */
len = get_8(buf);
*info=get_8(buf+len+1);
return len+2;
}
static int configure_type_string(const unsigned char *buf)
{
int len;
/* just skip past the type field */
len = get_8(buf);
if (len > 80) {
printk(KERN_ERR "eisa_enumerator: type info field too long (%d, max is 80)\n", len);
}
return 1+len;
}
static int configure_function(const unsigned char *buf, int *more)
{
/* the init field seems to be a two-byte field
* which is non-zero if there are an other function following
* I think it is the length of the function def
*/
*more = get_16(buf);
return 2;
}
static int parse_slot_config(int slot,
const unsigned char *buf,
struct eeprom_eisa_slot_info *es,
struct resource *io_parent,
struct resource *mem_parent)
{
int res=0;
int function_len;
unsigned int pos=0;
unsigned int maxlen;
int num_func=0;
u_int8_t flags;
int p0;
char *board;
int id_string_used=0;
if (NULL == (board = kmalloc(8, GFP_KERNEL))) {
return -1;
}
print_eisa_id(board, es->eisa_slot_id);
printk(KERN_INFO "EISA slot %d: %s %s ",
slot, board, es->flags&HPEE_FLAG_BOARD_IS_ISA ? "ISA" : "EISA");
maxlen = es->config_data_length < HPEE_MAX_LENGTH ?
es->config_data_length : HPEE_MAX_LENGTH;
while ((pos < maxlen) && (num_func <= es->num_functions)) {
pos+=configure_function(buf+pos, &function_len);
if (!function_len) {
break;
}
num_func++;
p0 = pos;
pos += configure_choise(buf+pos, &flags);
if (flags & HPEE_FUNCTION_INFO_F_DISABLED) {
/* function disabled, skip silently */
pos = p0 + function_len;
continue;
}
if (flags & HPEE_FUNCTION_INFO_CFG_FREE_FORM) {
/* I have no idea how to handle this */
printk("function %d have free-form configuration, skipping ",
num_func);
pos = p0 + function_len;
continue;
}
/* the ordering of the sections need
* more investigation.
* Currently I think that memory comaed before IRQ
* I assume the order is LSB to MSB in the
* info flags
* eg type, memory, irq, dma, port, HPEE_PORT_init
*/
if (flags & HPEE_FUNCTION_INFO_HAVE_TYPE) {
pos += configure_type_string(buf+pos);
}
if (flags & HPEE_FUNCTION_INFO_HAVE_MEMORY) {
id_string_used=1;
pos += configure_memory(buf+pos, mem_parent, board);
}
if (flags & HPEE_FUNCTION_INFO_HAVE_IRQ) {
pos += configure_irq(buf+pos);
}
if (flags & HPEE_FUNCTION_INFO_HAVE_DMA) {
pos += configure_dma(buf+pos);
}
if (flags & HPEE_FUNCTION_INFO_HAVE_PORT) {
id_string_used=1;
pos += configure_port(buf+pos, io_parent, board);
}
if (flags & HPEE_FUNCTION_INFO_HAVE_PORT_INIT) {
pos += configure_port_init(buf+pos);
}
if (p0 + function_len < pos) {
printk(KERN_ERR "eisa_enumerator: function %d length mismatch "
"got %d, expected %d\n",
num_func, pos-p0, function_len);
res=-1;
break;
}
pos = p0 + function_len;
}
pr_cont("\n");
if (!id_string_used) {
kfree(board);
}
if (pos != es->config_data_length) {
printk(KERN_ERR "eisa_enumerator: config data length mismatch got %d, expected %d\n",
pos, es->config_data_length);
res=-1;
}
if (num_func != es->num_functions) {
printk(KERN_ERR "eisa_enumerator: number of functions mismatch got %d, expected %d\n",
num_func, es->num_functions);
res=-2;
}
return res;
}
static int init_slot(int slot, struct eeprom_eisa_slot_info *es)
{
unsigned int id;
char id_string[8];
if (!(es->slot_info&HPEE_SLOT_INFO_NO_READID)) {
/* try to read the id of the board in the slot */
id = le32_to_cpu(inl(SLOT2PORT(slot)+EPI));
if (0xffffffff == id) {
/* Maybe we didn't expect a card to be here... */
if (es->eisa_slot_id == 0xffffffff)
return -1;
/* this board is not here or it does not
* support readid
*/
printk(KERN_ERR "EISA slot %d a configured board was not detected (",
slot);
print_eisa_id(id_string, es->eisa_slot_id);
printk(" expected %s)\n", id_string);
return -1;
}
if (es->eisa_slot_id != id) {
print_eisa_id(id_string, id);
printk(KERN_ERR "EISA slot %d id mismatch: got %s",
slot, id_string);
print_eisa_id(id_string, es->eisa_slot_id);
printk(" expected %s\n", id_string);
return -1;
}
}
/* now: we need to enable the board if
* it supports enabling and run through
* the port init sction if present
* and finally record any interrupt polarity
*/
if (es->slot_features & HPEE_SLOT_FEATURES_ENABLE) {
/* enable board */
outb(0x01| inb(SLOT2PORT(slot)+EPI+4),
SLOT2PORT(slot)+EPI+4);
}
return 0;
}
int eisa_enumerator(unsigned long eeprom_addr,
struct resource *io_parent, struct resource *mem_parent)
{
int i;
struct eeprom_header *eh;
static char eeprom_buf[HPEE_MAX_LENGTH];
for (i=0; i < HPEE_MAX_LENGTH; i++) {
eeprom_buf[i] = gsc_readb(eeprom_addr+i);
}
printk(KERN_INFO "Enumerating EISA bus\n");
eh = (struct eeprom_header*)(eeprom_buf);
for (i=0;i<eh->num_slots;i++) {
struct eeprom_eisa_slot_info *es;
es = (struct eeprom_eisa_slot_info*)
(&eeprom_buf[HPEE_SLOT_INFO(i)]);
if (-1==init_slot(i+1, es)) {
continue;
}
if (es->config_data_offset < HPEE_MAX_LENGTH) {
if (parse_slot_config(i+1, &eeprom_buf[es->config_data_offset],
es, io_parent, mem_parent)) {
return -1;
}
} else {
printk (KERN_WARNING "EISA EEPROM offset 0x%x out of range\n",es->config_data_offset);
return -1;
}
}
return eh->num_slots;
}
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