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kernel-ark/drivers/ieee1394/csr.c
Ben Collins 1934b8b656 [PATCH] Sync up ieee-1394 
Lots of this patch is trivial code cleanups (static vars were being
intialized to 0, etc).

There's also some fixes for ISO transmits (max buffer handling).
Aswell, we have a few fixes to disable IRM capabilites correctly.  We've
also disabled, by default some generally unused EXPORT symbols for the
sake of cleanliness in the kernel.  However, instead of removing them
completely, we felt it necessary to have a config option that allowed
them to be enabled for the many projects outside of the main kernel tree
that use our API for driver development.

The primary reason for this patch is to revert a MODE6->MODE10 RBC
conversion patch from the SCSI maintainers.  The new conversions handled
directly in the scsi layer do not seem to work for SBP2.  This patch
reverts to our old working code so that users can enjoy using Firewire
disks and dvd drives again.

We are working with the SCSI maintainers to resolve this issue outside
of the main kernel tree.  We'll merge the patch once the SCSI layer's
handling of the MODE10 conversion is working for us.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-10 12:23:23 -07:00

859 lines
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/*
* IEEE 1394 for Linux
*
* CSR implementation, iso/bus manager implementation.
*
* Copyright (C) 1999 Andreas E. Bombe
* 2002 Manfred Weihs <weihs@ict.tuwien.ac.at>
*
* This code is licensed under the GPL. See the file COPYING in the root
* directory of the kernel sources for details.
*
*
* Contributions:
*
* Manfred Weihs <weihs@ict.tuwien.ac.at>
* configuration ROM manipulation
*
*/
#include <linux/string.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/param.h>
#include <linux/spinlock.h>
#include "csr1212.h"
#include "ieee1394_types.h"
#include "hosts.h"
#include "ieee1394.h"
#include "highlevel.h"
#include "ieee1394_core.h"
/* Module Parameters */
/* this module parameter can be used to disable mapping of the FCP registers */
static int fcp = 1;
module_param(fcp, int, 0444);
MODULE_PARM_DESC(fcp, "Map FCP registers (default = 1, disable = 0).");
static struct csr1212_keyval *node_cap = NULL;
static void add_host(struct hpsb_host *host);
static void remove_host(struct hpsb_host *host);
static void host_reset(struct hpsb_host *host);
static int read_maps(struct hpsb_host *host, int nodeid, quadlet_t *buffer,
u64 addr, size_t length, u16 fl);
static int write_fcp(struct hpsb_host *host, int nodeid, int dest,
quadlet_t *data, u64 addr, size_t length, u16 flags);
static int read_regs(struct hpsb_host *host, int nodeid, quadlet_t *buf,
u64 addr, size_t length, u16 flags);
static int write_regs(struct hpsb_host *host, int nodeid, int destid,
quadlet_t *data, u64 addr, size_t length, u16 flags);
static int lock_regs(struct hpsb_host *host, int nodeid, quadlet_t *store,
u64 addr, quadlet_t data, quadlet_t arg, int extcode, u16 fl);
static int lock64_regs(struct hpsb_host *host, int nodeid, octlet_t * store,
u64 addr, octlet_t data, octlet_t arg, int extcode, u16 fl);
static int read_config_rom(struct hpsb_host *host, int nodeid, quadlet_t *buffer,
u64 addr, size_t length, u16 fl);
static u64 allocate_addr_range(u64 size, u32 alignment, void *__host);
static void release_addr_range(u64 addr, void *__host);
static struct hpsb_highlevel csr_highlevel = {
.name = "standard registers",
.add_host = add_host,
.remove_host = remove_host,
.host_reset = host_reset,
};
static struct hpsb_address_ops map_ops = {
.read = read_maps,
};
static struct hpsb_address_ops fcp_ops = {
.write = write_fcp,
};
static struct hpsb_address_ops reg_ops = {
.read = read_regs,
.write = write_regs,
.lock = lock_regs,
.lock64 = lock64_regs,
};
static struct hpsb_address_ops config_rom_ops = {
.read = read_config_rom,
};
struct csr1212_bus_ops csr_bus_ops = {
.allocate_addr_range = allocate_addr_range,
.release_addr = release_addr_range,
};
static u16 csr_crc16(unsigned *data, int length)
{
int check=0, i;
int shift, sum, next=0;
for (i = length; i; i--) {
for (next = check, shift = 28; shift >= 0; shift -= 4 ) {
sum = ((next >> 12) ^ (be32_to_cpu(*data) >> shift)) & 0xf;
next = (next << 4) ^ (sum << 12) ^ (sum << 5) ^ (sum);
}
check = next & 0xffff;
data++;
}
return check;
}
static void host_reset(struct hpsb_host *host)
{
host->csr.state &= 0x300;
host->csr.bus_manager_id = 0x3f;
host->csr.bandwidth_available = 4915;
host->csr.channels_available_hi = 0xfffffffe; /* pre-alloc ch 31 per 1394a-2000 */
host->csr.channels_available_lo = ~0;
host->csr.broadcast_channel = 0x80000000 | 31;
if (host->is_irm) {
if (host->driver->hw_csr_reg) {
host->driver->hw_csr_reg(host, 2, 0xfffffffe, ~0);
}
}
host->csr.node_ids = host->node_id << 16;
if (!host->is_root) {
/* clear cmstr bit */
host->csr.state &= ~0x100;
}
host->csr.topology_map[1] =
cpu_to_be32(be32_to_cpu(host->csr.topology_map[1]) + 1);
host->csr.topology_map[2] = cpu_to_be32(host->node_count << 16
| host->selfid_count);
host->csr.topology_map[0] =
cpu_to_be32((host->selfid_count + 2) << 16
| csr_crc16(host->csr.topology_map + 1,
host->selfid_count + 2));
host->csr.speed_map[1] =
cpu_to_be32(be32_to_cpu(host->csr.speed_map[1]) + 1);
host->csr.speed_map[0] = cpu_to_be32(0x3f1 << 16
| csr_crc16(host->csr.speed_map+1,
0x3f1));
}
/*
* HI == seconds (bits 0:2)
* LO == fraction units of 1/8000 of a second, as per 1394 (bits 19:31)
*
* Convert to units and then to HZ, for comparison to jiffies.
*
* By default this will end up being 800 units, or 100ms (125usec per
* unit).
*
* NOTE: The spec says 1/8000, but also says we can compute based on 1/8192
* like CSR specifies. Should make our math less complex.
*/
static inline void calculate_expire(struct csr_control *csr)
{
unsigned long units;
/* Take the seconds, and convert to units */
units = (unsigned long)(csr->split_timeout_hi & 0x07) << 13;
/* Add in the fractional units */
units += (unsigned long)(csr->split_timeout_lo >> 19);
/* Convert to jiffies */
csr->expire = (unsigned long)(units * HZ) >> 13UL;
/* Just to keep from rounding low */
csr->expire++;
HPSB_VERBOSE("CSR: setting expire to %lu, HZ=%u", csr->expire, HZ);
}
static void add_host(struct hpsb_host *host)
{
struct csr1212_keyval *root;
quadlet_t bus_info[CSR_BUS_INFO_SIZE];
hpsb_register_addrspace(&csr_highlevel, host, &reg_ops,
CSR_REGISTER_BASE,
CSR_REGISTER_BASE + CSR_CONFIG_ROM);
hpsb_register_addrspace(&csr_highlevel, host, &config_rom_ops,
CSR_REGISTER_BASE + CSR_CONFIG_ROM,
CSR_REGISTER_BASE + CSR_CONFIG_ROM_END);
if (fcp) {
hpsb_register_addrspace(&csr_highlevel, host, &fcp_ops,
CSR_REGISTER_BASE + CSR_FCP_COMMAND,
CSR_REGISTER_BASE + CSR_FCP_END);
}
hpsb_register_addrspace(&csr_highlevel, host, &map_ops,
CSR_REGISTER_BASE + CSR_TOPOLOGY_MAP,
CSR_REGISTER_BASE + CSR_TOPOLOGY_MAP_END);
hpsb_register_addrspace(&csr_highlevel, host, &map_ops,
CSR_REGISTER_BASE + CSR_SPEED_MAP,
CSR_REGISTER_BASE + CSR_SPEED_MAP_END);
spin_lock_init(&host->csr.lock);
host->csr.state = 0;
host->csr.node_ids = 0;
host->csr.split_timeout_hi = 0;
host->csr.split_timeout_lo = 800 << 19;
calculate_expire(&host->csr);
host->csr.cycle_time = 0;
host->csr.bus_time = 0;
host->csr.bus_manager_id = 0x3f;
host->csr.bandwidth_available = 4915;
host->csr.channels_available_hi = 0xfffffffe; /* pre-alloc ch 31 per 1394a-2000 */
host->csr.channels_available_lo = ~0;
host->csr.broadcast_channel = 0x80000000 | 31;
if (host->is_irm) {
if (host->driver->hw_csr_reg) {
host->driver->hw_csr_reg(host, 2, 0xfffffffe, ~0);
}
}
if (host->csr.max_rec >= 9)
host->csr.max_rom = 2;
else if (host->csr.max_rec >= 5)
host->csr.max_rom = 1;
else
host->csr.max_rom = 0;
host->csr.generation = 2;
bus_info[1] = __constant_cpu_to_be32(0x31333934);
bus_info[2] = cpu_to_be32((hpsb_disable_irm ? 0 : 1 << CSR_IRMC_SHIFT) |
(1 << CSR_CMC_SHIFT) |
(1 << CSR_ISC_SHIFT) |
(0 << CSR_BMC_SHIFT) |
(0 << CSR_PMC_SHIFT) |
(host->csr.cyc_clk_acc << CSR_CYC_CLK_ACC_SHIFT) |
(host->csr.max_rec << CSR_MAX_REC_SHIFT) |
(host->csr.max_rom << CSR_MAX_ROM_SHIFT) |
(host->csr.generation << CSR_GENERATION_SHIFT) |
host->csr.lnk_spd);
bus_info[3] = cpu_to_be32(host->csr.guid_hi);
bus_info[4] = cpu_to_be32(host->csr.guid_lo);
/* The hardware copy of the bus info block will be set later when a
* bus reset is issued. */
csr1212_init_local_csr(host->csr.rom, bus_info, host->csr.max_rom);
root = host->csr.rom->root_kv;
if(csr1212_attach_keyval_to_directory(root, node_cap) != CSR1212_SUCCESS) {
HPSB_ERR("Failed to attach Node Capabilities to root directory");
}
host->update_config_rom = 1;
}
static void remove_host(struct hpsb_host *host)
{
quadlet_t bus_info[CSR_BUS_INFO_SIZE];
bus_info[1] = __constant_cpu_to_be32(0x31333934);
bus_info[2] = cpu_to_be32((0 << CSR_IRMC_SHIFT) |
(0 << CSR_CMC_SHIFT) |
(0 << CSR_ISC_SHIFT) |
(0 << CSR_BMC_SHIFT) |
(0 << CSR_PMC_SHIFT) |
(host->csr.cyc_clk_acc << CSR_CYC_CLK_ACC_SHIFT) |
(host->csr.max_rec << CSR_MAX_REC_SHIFT) |
(0 << CSR_MAX_ROM_SHIFT) |
(0 << CSR_GENERATION_SHIFT) |
host->csr.lnk_spd);
bus_info[3] = cpu_to_be32(host->csr.guid_hi);
bus_info[4] = cpu_to_be32(host->csr.guid_lo);
csr1212_detach_keyval_from_directory(host->csr.rom->root_kv, node_cap);
csr1212_init_local_csr(host->csr.rom, bus_info, 0);
host->update_config_rom = 1;
}
int hpsb_update_config_rom(struct hpsb_host *host, const quadlet_t *new_rom,
size_t buffersize, unsigned char rom_version)
{
unsigned long flags;
int ret;
HPSB_NOTICE("hpsb_update_config_rom() is deprecated");
spin_lock_irqsave(&host->csr.lock, flags);
if (rom_version != host->csr.generation)
ret = -1;
else if (buffersize > host->csr.rom->cache_head->size)
ret = -2;
else {
/* Just overwrite the generated ConfigROM image with new data,
* it can be regenerated later. */
memcpy(host->csr.rom->cache_head->data, new_rom, buffersize);
host->csr.rom->cache_head->len = buffersize;
if (host->driver->set_hw_config_rom)
host->driver->set_hw_config_rom(host, host->csr.rom->bus_info_data);
/* Increment the generation number to keep some sort of sync
* with the newer ConfigROM manipulation method. */
host->csr.generation++;
if (host->csr.generation > 0xf || host->csr.generation < 2)
host->csr.generation = 2;
ret=0;
}
spin_unlock_irqrestore(&host->csr.lock, flags);
return ret;
}
/* Read topology / speed maps and configuration ROM */
static int read_maps(struct hpsb_host *host, int nodeid, quadlet_t *buffer,
u64 addr, size_t length, u16 fl)
{
unsigned long flags;
int csraddr = addr - CSR_REGISTER_BASE;
const char *src;
spin_lock_irqsave(&host->csr.lock, flags);
if (csraddr < CSR_SPEED_MAP) {
src = ((char *)host->csr.topology_map) + csraddr
- CSR_TOPOLOGY_MAP;
} else {
src = ((char *)host->csr.speed_map) + csraddr - CSR_SPEED_MAP;
}
memcpy(buffer, src, length);
spin_unlock_irqrestore(&host->csr.lock, flags);
return RCODE_COMPLETE;
}
#define out if (--length == 0) break
static int read_regs(struct hpsb_host *host, int nodeid, quadlet_t *buf,
u64 addr, size_t length, u16 flags)
{
int csraddr = addr - CSR_REGISTER_BASE;
int oldcycle;
quadlet_t ret;
if ((csraddr | length) & 0x3)
return RCODE_TYPE_ERROR;
length /= 4;
switch (csraddr) {
case CSR_STATE_CLEAR:
*(buf++) = cpu_to_be32(host->csr.state);
out;
case CSR_STATE_SET:
*(buf++) = cpu_to_be32(host->csr.state);
out;
case CSR_NODE_IDS:
*(buf++) = cpu_to_be32(host->csr.node_ids);
out;
case CSR_RESET_START:
return RCODE_TYPE_ERROR;
/* address gap - handled by default below */
case CSR_SPLIT_TIMEOUT_HI:
*(buf++) = cpu_to_be32(host->csr.split_timeout_hi);
out;
case CSR_SPLIT_TIMEOUT_LO:
*(buf++) = cpu_to_be32(host->csr.split_timeout_lo);
out;
/* address gap */
return RCODE_ADDRESS_ERROR;
case CSR_CYCLE_TIME:
oldcycle = host->csr.cycle_time;
host->csr.cycle_time =
host->driver->devctl(host, GET_CYCLE_COUNTER, 0);
if (oldcycle > host->csr.cycle_time) {
/* cycle time wrapped around */
host->csr.bus_time += 1 << 7;
}
*(buf++) = cpu_to_be32(host->csr.cycle_time);
out;
case CSR_BUS_TIME:
oldcycle = host->csr.cycle_time;
host->csr.cycle_time =
host->driver->devctl(host, GET_CYCLE_COUNTER, 0);
if (oldcycle > host->csr.cycle_time) {
/* cycle time wrapped around */
host->csr.bus_time += (1 << 7);
}
*(buf++) = cpu_to_be32(host->csr.bus_time
| (host->csr.cycle_time >> 25));
out;
/* address gap */
return RCODE_ADDRESS_ERROR;
case CSR_BUSY_TIMEOUT:
/* not yet implemented */
return RCODE_ADDRESS_ERROR;
case CSR_BUS_MANAGER_ID:
if (host->driver->hw_csr_reg)
ret = host->driver->hw_csr_reg(host, 0, 0, 0);
else
ret = host->csr.bus_manager_id;
*(buf++) = cpu_to_be32(ret);
out;
case CSR_BANDWIDTH_AVAILABLE:
if (host->driver->hw_csr_reg)
ret = host->driver->hw_csr_reg(host, 1, 0, 0);
else
ret = host->csr.bandwidth_available;
*(buf++) = cpu_to_be32(ret);
out;
case CSR_CHANNELS_AVAILABLE_HI:
if (host->driver->hw_csr_reg)
ret = host->driver->hw_csr_reg(host, 2, 0, 0);
else
ret = host->csr.channels_available_hi;
*(buf++) = cpu_to_be32(ret);
out;
case CSR_CHANNELS_AVAILABLE_LO:
if (host->driver->hw_csr_reg)
ret = host->driver->hw_csr_reg(host, 3, 0, 0);
else
ret = host->csr.channels_available_lo;
*(buf++) = cpu_to_be32(ret);
out;
case CSR_BROADCAST_CHANNEL:
*(buf++) = cpu_to_be32(host->csr.broadcast_channel);
out;
/* address gap to end - fall through to default */
default:
return RCODE_ADDRESS_ERROR;
}
return RCODE_COMPLETE;
}
static int write_regs(struct hpsb_host *host, int nodeid, int destid,
quadlet_t *data, u64 addr, size_t length, u16 flags)
{
int csraddr = addr - CSR_REGISTER_BASE;
if ((csraddr | length) & 0x3)
return RCODE_TYPE_ERROR;
length /= 4;
switch (csraddr) {
case CSR_STATE_CLEAR:
/* FIXME FIXME FIXME */
printk("doh, someone wants to mess with state clear\n");
out;
case CSR_STATE_SET:
printk("doh, someone wants to mess with state set\n");
out;
case CSR_NODE_IDS:
host->csr.node_ids &= NODE_MASK << 16;
host->csr.node_ids |= be32_to_cpu(*(data++)) & (BUS_MASK << 16);
host->node_id = host->csr.node_ids >> 16;
host->driver->devctl(host, SET_BUS_ID, host->node_id >> 6);
out;
case CSR_RESET_START:
/* FIXME - perform command reset */
out;
/* address gap */
return RCODE_ADDRESS_ERROR;
case CSR_SPLIT_TIMEOUT_HI:
host->csr.split_timeout_hi =
be32_to_cpu(*(data++)) & 0x00000007;
calculate_expire(&host->csr);
out;
case CSR_SPLIT_TIMEOUT_LO:
host->csr.split_timeout_lo =
be32_to_cpu(*(data++)) & 0xfff80000;
calculate_expire(&host->csr);
out;
/* address gap */
return RCODE_ADDRESS_ERROR;
case CSR_CYCLE_TIME:
/* should only be set by cycle start packet, automatically */
host->csr.cycle_time = be32_to_cpu(*data);
host->driver->devctl(host, SET_CYCLE_COUNTER,
be32_to_cpu(*(data++)));
out;
case CSR_BUS_TIME:
host->csr.bus_time = be32_to_cpu(*(data++)) & 0xffffff80;
out;
/* address gap */
return RCODE_ADDRESS_ERROR;
case CSR_BUSY_TIMEOUT:
/* not yet implemented */
return RCODE_ADDRESS_ERROR;
case CSR_BUS_MANAGER_ID:
case CSR_BANDWIDTH_AVAILABLE:
case CSR_CHANNELS_AVAILABLE_HI:
case CSR_CHANNELS_AVAILABLE_LO:
/* these are not writable, only lockable */
return RCODE_TYPE_ERROR;
case CSR_BROADCAST_CHANNEL:
/* only the valid bit can be written */
host->csr.broadcast_channel = (host->csr.broadcast_channel & ~0x40000000)
| (be32_to_cpu(*data) & 0x40000000);
out;
/* address gap to end - fall through */
default:
return RCODE_ADDRESS_ERROR;
}
return RCODE_COMPLETE;
}
#undef out
static int lock_regs(struct hpsb_host *host, int nodeid, quadlet_t *store,
u64 addr, quadlet_t data, quadlet_t arg, int extcode, u16 fl)
{
int csraddr = addr - CSR_REGISTER_BASE;
unsigned long flags;
quadlet_t *regptr = NULL;
if (csraddr & 0x3)
return RCODE_TYPE_ERROR;
if (csraddr < CSR_BUS_MANAGER_ID || csraddr > CSR_CHANNELS_AVAILABLE_LO
|| extcode != EXTCODE_COMPARE_SWAP)
goto unsupported_lockreq;
data = be32_to_cpu(data);
arg = be32_to_cpu(arg);
/* Is somebody releasing the broadcast_channel on us? */
if (csraddr == CSR_CHANNELS_AVAILABLE_HI && (data & 0x1)) {
/* Note: this is may not be the right way to handle
* the problem, so we should look into the proper way
* eventually. */
HPSB_WARN("Node [" NODE_BUS_FMT "] wants to release "
"broadcast channel 31. Ignoring.",
NODE_BUS_ARGS(host, nodeid));
data &= ~0x1; /* keep broadcast channel allocated */
}
if (host->driver->hw_csr_reg) {
quadlet_t old;
old = host->driver->
hw_csr_reg(host, (csraddr - CSR_BUS_MANAGER_ID) >> 2,
data, arg);
*store = cpu_to_be32(old);
return RCODE_COMPLETE;
}
spin_lock_irqsave(&host->csr.lock, flags);
switch (csraddr) {
case CSR_BUS_MANAGER_ID:
regptr = &host->csr.bus_manager_id;
*store = cpu_to_be32(*regptr);
if (*regptr == arg)
*regptr = data;
break;
case CSR_BANDWIDTH_AVAILABLE:
{
quadlet_t bandwidth;
quadlet_t old;
quadlet_t new;
regptr = &host->csr.bandwidth_available;
old = *regptr;
/* bandwidth available algorithm adapted from IEEE 1394a-2000 spec */
if (arg > 0x1fff) {
*store = cpu_to_be32(old); /* change nothing */
break;
}
data &= 0x1fff;
if (arg >= data) {
/* allocate bandwidth */
bandwidth = arg - data;
if (old >= bandwidth) {
new = old - bandwidth;
*store = cpu_to_be32(arg);
*regptr = new;
} else {
*store = cpu_to_be32(old);
}
} else {
/* deallocate bandwidth */
bandwidth = data - arg;
if (old + bandwidth < 0x2000) {
new = old + bandwidth;
*store = cpu_to_be32(arg);
*regptr = new;
} else {
*store = cpu_to_be32(old);
}
}
break;
}
case CSR_CHANNELS_AVAILABLE_HI:
{
/* Lock algorithm for CHANNELS_AVAILABLE as recommended by 1394a-2000 */
quadlet_t affected_channels = arg ^ data;
regptr = &host->csr.channels_available_hi;
if ((arg & affected_channels) == (*regptr & affected_channels)) {
*regptr ^= affected_channels;
*store = cpu_to_be32(arg);
} else {
*store = cpu_to_be32(*regptr);
}
break;
}
case CSR_CHANNELS_AVAILABLE_LO:
{
/* Lock algorithm for CHANNELS_AVAILABLE as recommended by 1394a-2000 */
quadlet_t affected_channels = arg ^ data;
regptr = &host->csr.channels_available_lo;
if ((arg & affected_channels) == (*regptr & affected_channels)) {
*regptr ^= affected_channels;
*store = cpu_to_be32(arg);
} else {
*store = cpu_to_be32(*regptr);
}
break;
}
}
spin_unlock_irqrestore(&host->csr.lock, flags);
return RCODE_COMPLETE;
unsupported_lockreq:
switch (csraddr) {
case CSR_STATE_CLEAR:
case CSR_STATE_SET:
case CSR_RESET_START:
case CSR_NODE_IDS:
case CSR_SPLIT_TIMEOUT_HI:
case CSR_SPLIT_TIMEOUT_LO:
case CSR_CYCLE_TIME:
case CSR_BUS_TIME:
case CSR_BROADCAST_CHANNEL:
return RCODE_TYPE_ERROR;
case CSR_BUSY_TIMEOUT:
/* not yet implemented - fall through */
default:
return RCODE_ADDRESS_ERROR;
}
}
static int lock64_regs(struct hpsb_host *host, int nodeid, octlet_t * store,
u64 addr, octlet_t data, octlet_t arg, int extcode, u16 fl)
{
int csraddr = addr - CSR_REGISTER_BASE;
unsigned long flags;
data = be64_to_cpu(data);
arg = be64_to_cpu(arg);
if (csraddr & 0x3)
return RCODE_TYPE_ERROR;
if (csraddr != CSR_CHANNELS_AVAILABLE
|| extcode != EXTCODE_COMPARE_SWAP)
goto unsupported_lock64req;
/* Is somebody releasing the broadcast_channel on us? */
if (csraddr == CSR_CHANNELS_AVAILABLE_HI && (data & 0x100000000ULL)) {
/* Note: this is may not be the right way to handle
* the problem, so we should look into the proper way
* eventually. */
HPSB_WARN("Node [" NODE_BUS_FMT "] wants to release "
"broadcast channel 31. Ignoring.",
NODE_BUS_ARGS(host, nodeid));
data &= ~0x100000000ULL; /* keep broadcast channel allocated */
}
if (host->driver->hw_csr_reg) {
quadlet_t data_hi, data_lo;
quadlet_t arg_hi, arg_lo;
quadlet_t old_hi, old_lo;
data_hi = data >> 32;
data_lo = data & 0xFFFFFFFF;
arg_hi = arg >> 32;
arg_lo = arg & 0xFFFFFFFF;
old_hi = host->driver->hw_csr_reg(host, (csraddr - CSR_BUS_MANAGER_ID) >> 2,
data_hi, arg_hi);
old_lo = host->driver->hw_csr_reg(host, ((csraddr + 4) - CSR_BUS_MANAGER_ID) >> 2,
data_lo, arg_lo);
*store = cpu_to_be64(((octlet_t)old_hi << 32) | old_lo);
} else {
octlet_t old;
octlet_t affected_channels = arg ^ data;
spin_lock_irqsave(&host->csr.lock, flags);
old = ((octlet_t)host->csr.channels_available_hi << 32) | host->csr.channels_available_lo;
if ((arg & affected_channels) == (old & affected_channels)) {
host->csr.channels_available_hi ^= (affected_channels >> 32);
host->csr.channels_available_lo ^= (affected_channels & 0xffffffff);
*store = cpu_to_be64(arg);
} else {
*store = cpu_to_be64(old);
}
spin_unlock_irqrestore(&host->csr.lock, flags);
}
/* Is somebody erroneously releasing the broadcast_channel on us? */
if (host->csr.channels_available_hi & 0x1)
host->csr.channels_available_hi &= ~0x1;
return RCODE_COMPLETE;
unsupported_lock64req:
switch (csraddr) {
case CSR_STATE_CLEAR:
case CSR_STATE_SET:
case CSR_RESET_START:
case CSR_NODE_IDS:
case CSR_SPLIT_TIMEOUT_HI:
case CSR_SPLIT_TIMEOUT_LO:
case CSR_CYCLE_TIME:
case CSR_BUS_TIME:
case CSR_BUS_MANAGER_ID:
case CSR_BROADCAST_CHANNEL:
case CSR_BUSY_TIMEOUT:
case CSR_BANDWIDTH_AVAILABLE:
return RCODE_TYPE_ERROR;
default:
return RCODE_ADDRESS_ERROR;
}
}
static int write_fcp(struct hpsb_host *host, int nodeid, int dest,
quadlet_t *data, u64 addr, size_t length, u16 flags)
{
int csraddr = addr - CSR_REGISTER_BASE;
if (length > 512)
return RCODE_TYPE_ERROR;
switch (csraddr) {
case CSR_FCP_COMMAND:
highlevel_fcp_request(host, nodeid, 0, (u8 *)data, length);
break;
case CSR_FCP_RESPONSE:
highlevel_fcp_request(host, nodeid, 1, (u8 *)data, length);
break;
default:
return RCODE_TYPE_ERROR;
}
return RCODE_COMPLETE;
}
static int read_config_rom(struct hpsb_host *host, int nodeid, quadlet_t *buffer,
u64 addr, size_t length, u16 fl)
{
u32 offset = addr - CSR1212_REGISTER_SPACE_BASE;
if (csr1212_read(host->csr.rom, offset, buffer, length) == CSR1212_SUCCESS)
return RCODE_COMPLETE;
else
return RCODE_ADDRESS_ERROR;
}
static u64 allocate_addr_range(u64 size, u32 alignment, void *__host)
{
struct hpsb_host *host = (struct hpsb_host*)__host;
return hpsb_allocate_and_register_addrspace(&csr_highlevel,
host,
&config_rom_ops,
size, alignment,
CSR1212_UNITS_SPACE_BASE,
CSR1212_UNITS_SPACE_END);
}
static void release_addr_range(u64 addr, void *__host)
{
struct hpsb_host *host = (struct hpsb_host*)__host;
hpsb_unregister_addrspace(&csr_highlevel, host, addr);
}
int init_csr(void)
{
node_cap = csr1212_new_immediate(CSR1212_KV_ID_NODE_CAPABILITIES, 0x0083c0);
if (!node_cap) {
HPSB_ERR("Failed to allocate memory for Node Capabilties ConfigROM entry!");
return -ENOMEM;
}
hpsb_register_highlevel(&csr_highlevel);
return 0;
}
void cleanup_csr(void)
{
if (node_cap)
csr1212_release_keyval(node_cap);
hpsb_unregister_highlevel(&csr_highlevel);
}
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