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Diffstat (limited to 'drivers/ieee1394/csr.c')
-rw-r--r--drivers/ieee1394/csr.c857
1 files changed, 857 insertions, 0 deletions
diff --git a/drivers/ieee1394/csr.c b/drivers/ieee1394/csr.c
new file mode 100644
index 000000000000..1b98684aebcd
--- /dev/null
+++ b/drivers/ieee1394/csr.c
@@ -0,0 +1,857 @@
+/*
+ * 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"
+
+/* 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((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);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 23:25:02 +0000