diff options
Diffstat (limited to 'drivers/ieee1394/highlevel.c')
| -rw-r--r-- | drivers/ieee1394/highlevel.c | 704 |
1 files changed, 704 insertions, 0 deletions
diff --git a/drivers/ieee1394/highlevel.c b/drivers/ieee1394/highlevel.c new file mode 100644 index 00000000000..997e1bf6297 --- /dev/null +++ b/drivers/ieee1394/highlevel.c @@ -0,0 +1,704 @@ +/* + * IEEE 1394 for Linux + * + * Copyright (C) 1999 Andreas E. Bombe + * + * This code is licensed under the GPL. See the file COPYING in the root + * directory of the kernel sources for details. + * + * + * Contributions: + * + * Christian Toegel <christian.toegel@gmx.at> + * unregister address space + * + * Manfred Weihs <weihs@ict.tuwien.ac.at> + * unregister address space + * + */ + +#include <linux/config.h> +#include <linux/slab.h> +#include <linux/list.h> +#include <linux/bitops.h> + +#include "ieee1394.h" +#include "ieee1394_types.h" +#include "hosts.h" +#include "ieee1394_core.h" +#include "highlevel.h" +#include "nodemgr.h" + + +struct hl_host_info { + struct list_head list; + struct hpsb_host *host; + size_t size; + unsigned long key; + void *data; +}; + + +static LIST_HEAD(hl_drivers); +static DECLARE_RWSEM(hl_drivers_sem); + +static LIST_HEAD(hl_irqs); +static DEFINE_RWLOCK(hl_irqs_lock); + +static DEFINE_RWLOCK(addr_space_lock); + +/* addr_space list will have zero and max already included as bounds */ +static struct hpsb_address_ops dummy_ops = { NULL, NULL, NULL, NULL }; +static struct hpsb_address_serve dummy_zero_addr, dummy_max_addr; + + +static struct hl_host_info *hl_get_hostinfo(struct hpsb_highlevel *hl, + struct hpsb_host *host) +{ + struct hl_host_info *hi = NULL; + + if (!hl || !host) + return NULL; + + read_lock(&hl->host_info_lock); + list_for_each_entry(hi, &hl->host_info_list, list) { + if (hi->host == host) { + read_unlock(&hl->host_info_lock); + return hi; + } + } + read_unlock(&hl->host_info_lock); + + return NULL; +} + + +/* Returns a per host/driver data structure that was previously stored by + * hpsb_create_hostinfo. */ +void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host) +{ + struct hl_host_info *hi = hl_get_hostinfo(hl, host); + + if (hi) + return hi->data; + + return NULL; +} + + +/* If size is zero, then the return here is only valid for error checking */ +void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host, + size_t data_size) +{ + struct hl_host_info *hi; + void *data; + unsigned long flags; + + hi = hl_get_hostinfo(hl, host); + if (hi) { + HPSB_ERR("%s called hpsb_create_hostinfo when hostinfo already exists", + hl->name); + return NULL; + } + + hi = kmalloc(sizeof(*hi) + data_size, GFP_ATOMIC); + if (!hi) + return NULL; + + memset(hi, 0, sizeof(*hi) + data_size); + + if (data_size) { + data = hi->data = hi + 1; + hi->size = data_size; + } else + data = hi; + + hi->host = host; + + write_lock_irqsave(&hl->host_info_lock, flags); + list_add_tail(&hi->list, &hl->host_info_list); + write_unlock_irqrestore(&hl->host_info_lock, flags); + + return data; +} + + +int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host, + void *data) +{ + struct hl_host_info *hi; + + hi = hl_get_hostinfo(hl, host); + if (hi) { + if (!hi->size && !hi->data) { + hi->data = data; + return 0; + } else + HPSB_ERR("%s called hpsb_set_hostinfo when hostinfo already has data", + hl->name); + } else + HPSB_ERR("%s called hpsb_set_hostinfo when no hostinfo exists", + hl->name); + + return -EINVAL; +} + + +void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host) +{ + struct hl_host_info *hi; + + hi = hl_get_hostinfo(hl, host); + if (hi) { + unsigned long flags; + write_lock_irqsave(&hl->host_info_lock, flags); + list_del(&hi->list); + write_unlock_irqrestore(&hl->host_info_lock, flags); + kfree(hi); + } + + return; +} + + +void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host, unsigned long key) +{ + struct hl_host_info *hi; + + hi = hl_get_hostinfo(hl, host); + if (hi) + hi->key = key; + + return; +} + + +void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key) +{ + struct hl_host_info *hi; + void *data = NULL; + + if (!hl) + return NULL; + + read_lock(&hl->host_info_lock); + list_for_each_entry(hi, &hl->host_info_list, list) { + if (hi->key == key) { + data = hi->data; + break; + } + } + read_unlock(&hl->host_info_lock); + + return data; +} + + +static int highlevel_for_each_host_reg(struct hpsb_host *host, void *__data) +{ + struct hpsb_highlevel *hl = __data; + + hl->add_host(host); + + if (host->update_config_rom) { + if (hpsb_update_config_rom_image(host) < 0) { + HPSB_ERR("Failed to generate Configuration ROM image for host " + "%s-%d", hl->name, host->id); + } + } + + return 0; +} + +void hpsb_register_highlevel(struct hpsb_highlevel *hl) +{ + INIT_LIST_HEAD(&hl->addr_list); + INIT_LIST_HEAD(&hl->host_info_list); + + rwlock_init(&hl->host_info_lock); + + down_write(&hl_drivers_sem); + list_add_tail(&hl->hl_list, &hl_drivers); + up_write(&hl_drivers_sem); + + write_lock(&hl_irqs_lock); + list_add_tail(&hl->irq_list, &hl_irqs); + write_unlock(&hl_irqs_lock); + + if (hl->add_host) + nodemgr_for_each_host(hl, highlevel_for_each_host_reg); + + return; +} + +static void __delete_addr(struct hpsb_address_serve *as) +{ + list_del(&as->host_list); + list_del(&as->hl_list); + kfree(as); +} + +static void __unregister_host(struct hpsb_highlevel *hl, struct hpsb_host *host, int update_cr) +{ + unsigned long flags; + struct list_head *lh, *next; + struct hpsb_address_serve *as; + + /* First, let the highlevel driver unreg */ + if (hl->remove_host) + hl->remove_host(host); + + /* Remove any addresses that are matched for this highlevel driver + * and this particular host. */ + write_lock_irqsave(&addr_space_lock, flags); + list_for_each_safe (lh, next, &hl->addr_list) { + as = list_entry(lh, struct hpsb_address_serve, hl_list); + + if (as->host == host) + __delete_addr(as); + } + write_unlock_irqrestore(&addr_space_lock, flags); + + /* Now update the config-rom to reflect anything removed by the + * highlevel driver. */ + if (update_cr && host->update_config_rom) { + if (hpsb_update_config_rom_image(host) < 0) { + HPSB_ERR("Failed to generate Configuration ROM image for host " + "%s-%d", hl->name, host->id); + } + } + + /* And finally, remove all the host info associated between these + * two. */ + hpsb_destroy_hostinfo(hl, host); +} + +static int highlevel_for_each_host_unreg(struct hpsb_host *host, void *__data) +{ + struct hpsb_highlevel *hl = __data; + + __unregister_host(hl, host, 1); + + return 0; +} + +void hpsb_unregister_highlevel(struct hpsb_highlevel *hl) +{ + write_lock(&hl_irqs_lock); + list_del(&hl->irq_list); + write_unlock(&hl_irqs_lock); + + down_write(&hl_drivers_sem); + list_del(&hl->hl_list); + up_write(&hl_drivers_sem); + + nodemgr_for_each_host(hl, highlevel_for_each_host_unreg); +} + +u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl, + struct hpsb_host *host, + struct hpsb_address_ops *ops, + u64 size, u64 alignment, + u64 start, u64 end) +{ + struct hpsb_address_serve *as, *a1, *a2; + struct list_head *entry; + u64 retval = ~0ULL; + unsigned long flags; + u64 align_mask = ~(alignment - 1); + + if ((alignment & 3) || (alignment > 0x800000000000ULL) || + ((hweight32(alignment >> 32) + + hweight32(alignment & 0xffffffff) != 1))) { + HPSB_ERR("%s called with invalid alignment: 0x%048llx", + __FUNCTION__, (unsigned long long)alignment); + return retval; + } + + if (start == ~0ULL && end == ~0ULL) { + start = CSR1212_ALL_SPACE_BASE + 0xffff00000000ULL; /* ohci1394.c limit */ + end = CSR1212_ALL_SPACE_END; + } + + if (((start|end) & ~align_mask) || (start >= end) || (end > 0x1000000000000ULL)) { + HPSB_ERR("%s called with invalid addresses (start = %012Lx end = %012Lx)", + __FUNCTION__, (unsigned long long)start, (unsigned long long)end); + return retval; + } + + as = (struct hpsb_address_serve *) + kmalloc(sizeof(struct hpsb_address_serve), GFP_KERNEL); + if (as == NULL) { + return retval; + } + + INIT_LIST_HEAD(&as->host_list); + INIT_LIST_HEAD(&as->hl_list); + as->op = ops; + as->host = host; + + write_lock_irqsave(&addr_space_lock, flags); + + list_for_each(entry, &host->addr_space) { + u64 a1sa, a1ea; + u64 a2sa, a2ea; + + a1 = list_entry(entry, struct hpsb_address_serve, host_list); + a2 = list_entry(entry->next, struct hpsb_address_serve, host_list); + + a1sa = a1->start & align_mask; + a1ea = (a1->end + alignment -1) & align_mask; + a2sa = a2->start & align_mask; + a2ea = (a2->end + alignment -1) & align_mask; + + if ((a2sa - a1ea >= size) && (a2sa - start >= size) && (a2sa > start)) { + as->start = max(start, a1ea); + as->end = as->start + size; + list_add(&as->host_list, entry); + list_add_tail(&as->hl_list, &hl->addr_list); + retval = as->start; + break; + } + } + + write_unlock_irqrestore(&addr_space_lock, flags); + + if (retval == ~0ULL) { + kfree(as); + } + + return retval; +} + +int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host, + struct hpsb_address_ops *ops, u64 start, u64 end) +{ + struct hpsb_address_serve *as; + struct list_head *lh; + int retval = 0; + unsigned long flags; + + if (((start|end) & 3) || (start >= end) || (end > 0x1000000000000ULL)) { + HPSB_ERR("%s called with invalid addresses", __FUNCTION__); + return 0; + } + + as = (struct hpsb_address_serve *) + kmalloc(sizeof(struct hpsb_address_serve), GFP_ATOMIC); + if (as == NULL) { + return 0; + } + + INIT_LIST_HEAD(&as->host_list); + INIT_LIST_HEAD(&as->hl_list); + as->op = ops; + as->start = start; + as->end = end; + as->host = host; + + write_lock_irqsave(&addr_space_lock, flags); + + list_for_each(lh, &host->addr_space) { + struct hpsb_address_serve *as_this = + list_entry(lh, struct hpsb_address_serve, host_list); + struct hpsb_address_serve *as_next = + list_entry(lh->next, struct hpsb_address_serve, host_list); + + if (as_this->end > as->start) + break; + + if (as_next->start >= as->end) { + list_add(&as->host_list, lh); + list_add_tail(&as->hl_list, &hl->addr_list); + retval = 1; + break; + } + } + write_unlock_irqrestore(&addr_space_lock, flags); + + if (retval == 0) + kfree(as); + + return retval; +} + +int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host, + u64 start) +{ + int retval = 0; + struct hpsb_address_serve *as; + struct list_head *lh, *next; + unsigned long flags; + + write_lock_irqsave(&addr_space_lock, flags); + + list_for_each_safe (lh, next, &hl->addr_list) { + as = list_entry(lh, struct hpsb_address_serve, hl_list); + if (as->start == start && as->host == host) { + __delete_addr(as); + retval = 1; + break; + } + } + + write_unlock_irqrestore(&addr_space_lock, flags); + + return retval; +} + +int hpsb_listen_channel(struct hpsb_highlevel *hl, struct hpsb_host *host, + unsigned int channel) +{ + if (channel > 63) { + HPSB_ERR("%s called with invalid channel", __FUNCTION__); + return -EINVAL; + } + + if (host->iso_listen_count[channel]++ == 0) { + return host->driver->devctl(host, ISO_LISTEN_CHANNEL, channel); + } + + return 0; +} + +void hpsb_unlisten_channel(struct hpsb_highlevel *hl, struct hpsb_host *host, + unsigned int channel) +{ + if (channel > 63) { + HPSB_ERR("%s called with invalid channel", __FUNCTION__); + return; + } + + if (--host->iso_listen_count[channel] == 0) { + host->driver->devctl(host, ISO_UNLISTEN_CHANNEL, channel); + } +} + +static void init_hpsb_highlevel(struct hpsb_host *host) +{ + INIT_LIST_HEAD(&dummy_zero_addr.host_list); + INIT_LIST_HEAD(&dummy_zero_addr.hl_list); + INIT_LIST_HEAD(&dummy_max_addr.host_list); + INIT_LIST_HEAD(&dummy_max_addr.hl_list); + + dummy_zero_addr.op = dummy_max_addr.op = &dummy_ops; + + dummy_zero_addr.start = dummy_zero_addr.end = 0; + dummy_max_addr.start = dummy_max_addr.end = ((u64) 1) << 48; + + list_add_tail(&dummy_zero_addr.host_list, &host->addr_space); + list_add_tail(&dummy_max_addr.host_list, &host->addr_space); +} + +void highlevel_add_host(struct hpsb_host *host) +{ + struct hpsb_highlevel *hl; + + init_hpsb_highlevel(host); + + down_read(&hl_drivers_sem); + list_for_each_entry(hl, &hl_drivers, hl_list) { + if (hl->add_host) + hl->add_host(host); + } + up_read(&hl_drivers_sem); + if (host->update_config_rom) { + if (hpsb_update_config_rom_image(host) < 0) + HPSB_ERR("Failed to generate Configuration ROM image for " + "host %s-%d", hl->name, host->id); + } +} + +void highlevel_remove_host(struct hpsb_host *host) +{ + struct hpsb_highlevel *hl; + + down_read(&hl_drivers_sem); + list_for_each_entry(hl, &hl_drivers, hl_list) + __unregister_host(hl, host, 0); + up_read(&hl_drivers_sem); +} + +void highlevel_host_reset(struct hpsb_host *host) +{ + struct hpsb_highlevel *hl; + + read_lock(&hl_irqs_lock); + list_for_each_entry(hl, &hl_irqs, irq_list) { + if (hl->host_reset) + hl->host_reset(host); + } + read_unlock(&hl_irqs_lock); +} + +void highlevel_iso_receive(struct hpsb_host *host, void *data, size_t length) +{ + struct hpsb_highlevel *hl; + int channel = (((quadlet_t *)data)[0] >> 8) & 0x3f; + + read_lock(&hl_irqs_lock); + list_for_each_entry(hl, &hl_irqs, irq_list) { + if (hl->iso_receive) + hl->iso_receive(host, channel, data, length); + } + read_unlock(&hl_irqs_lock); +} + +void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction, + void *data, size_t length) +{ + struct hpsb_highlevel *hl; + int cts = ((quadlet_t *)data)[0] >> 4; + + read_lock(&hl_irqs_lock); + list_for_each_entry(hl, &hl_irqs, irq_list) { + if (hl->fcp_request) + hl->fcp_request(host, nodeid, direction, cts, data, + length); + } + read_unlock(&hl_irqs_lock); +} + +int highlevel_read(struct hpsb_host *host, int nodeid, void *data, + u64 addr, unsigned int length, u16 flags) +{ + struct hpsb_address_serve *as; + unsigned int partlength; + int rcode = RCODE_ADDRESS_ERROR; + + read_lock(&addr_space_lock); + + list_for_each_entry(as, &host->addr_space, host_list) { + if (as->start > addr) + break; + + if (as->end > addr) { + partlength = min(as->end - addr, (u64) length); + + if (as->op->read) { + rcode = as->op->read(host, nodeid, data, + addr, partlength, flags); + } else { + rcode = RCODE_TYPE_ERROR; + } + + data += partlength; + length -= partlength; + addr += partlength; + + if ((rcode != RCODE_COMPLETE) || !length) { + break; + } + } + } + + read_unlock(&addr_space_lock); + + if (length && (rcode == RCODE_COMPLETE)) { + rcode = RCODE_ADDRESS_ERROR; + } + + return rcode; +} + +int highlevel_write(struct hpsb_host *host, int nodeid, int destid, + void *data, u64 addr, unsigned int length, u16 flags) +{ + struct hpsb_address_serve *as; + unsigned int partlength; + int rcode = RCODE_ADDRESS_ERROR; + + read_lock(&addr_space_lock); + + list_for_each_entry(as, &host->addr_space, host_list) { + if (as->start > addr) + break; + + if (as->end > addr) { + partlength = min(as->end - addr, (u64) length); + + if (as->op->write) { + rcode = as->op->write(host, nodeid, destid, + data, addr, partlength, flags); + } else { + rcode = RCODE_TYPE_ERROR; + } + + data += partlength; + length -= partlength; + addr += partlength; + + if ((rcode != RCODE_COMPLETE) || !length) { + break; + } + } + } + + read_unlock(&addr_space_lock); + + if (length && (rcode == RCODE_COMPLETE)) { + rcode = RCODE_ADDRESS_ERROR; + } + + return rcode; +} + + +int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store, + u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode, u16 flags) +{ + struct hpsb_address_serve *as; + int rcode = RCODE_ADDRESS_ERROR; + + read_lock(&addr_space_lock); + + list_for_each_entry(as, &host->addr_space, host_list) { + if (as->start > addr) + break; + + if (as->end > addr) { + if (as->op->lock) { + rcode = as->op->lock(host, nodeid, store, addr, + data, arg, ext_tcode, flags); + } else { + rcode = RCODE_TYPE_ERROR; + } + + break; + } + } + + read_unlock(&addr_space_lock); + + return rcode; +} + +int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store, + u64 addr, octlet_t data, octlet_t arg, int ext_tcode, u16 flags) +{ + struct hpsb_address_serve *as; + int rcode = RCODE_ADDRESS_ERROR; + + read_lock(&addr_space_lock); + + list_for_each_entry(as, &host->addr_space, host_list) { + if (as->start > addr) + break; + + if (as->end > addr) { + if (as->op->lock64) { + rcode = as->op->lock64(host, nodeid, store, + addr, data, arg, + ext_tcode, flags); + } else { + rcode = RCODE_TYPE_ERROR; + } + + break; + } + } + + read_unlock(&addr_space_lock); + + return rcode; +} |