diff options
Diffstat (limited to 'drivers/ieee1394/csr.c')
| -rw-r--r-- | drivers/ieee1394/csr.c | 843 |
1 files changed, 0 insertions, 843 deletions
diff --git a/drivers/ieee1394/csr.c b/drivers/ieee1394/csr.c deleted file mode 100644 index d696f69ebce5..000000000000 --- a/drivers/ieee1394/csr.c +++ /dev/null @@ -1,843 +0,0 @@ -/* - * 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/jiffies.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/param.h> -#include <linux/spinlock.h> -#include <linux/string.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 const struct hpsb_address_ops map_ops = { - .read = read_maps, -}; - -static const struct hpsb_address_ops fcp_ops = { - .write = write_fcp, -}; - -static const struct hpsb_address_ops reg_ops = { - .read = read_regs, - .write = write_regs, - .lock = lock_regs, - .lock64 = lock64_regs, -}; - -static const 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; - } - - be32_add_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)); - - be32_add_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 == fractions of a second in units of 125usec (bits 19:31) - * - * Convert SPLIT_TIMEOUT to jiffies. - * The default and minimum as per 1394a-2000 clause 8.3.2.2.6 is 100ms. - */ -static inline void calculate_expire(struct csr_control *csr) -{ - unsigned int usecs = (csr->split_timeout_hi & 7) * 1000000 + - (csr->split_timeout_lo >> 19) * 125; - - csr->expire = usecs_to_jiffies(usecs > 100000 ? usecs : 100000); - 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, ®_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] = IEEE1394_BUSID_MAGIC; - 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] = IEEE1394_BUSID_MAGIC; - 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); -} |