+++ /dev/null
-/*
- * 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/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);
-
-
-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;
-}
-
-/**
- * hpsb_get_hostinfo - retrieve a hostinfo pointer bound to this driver/host
- *
- * Returns a per @host and @hl 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);
-
- return hi ? hi->data : NULL;
-}
-
-/**
- * hpsb_create_hostinfo - allocate a hostinfo pointer bound to this driver/host
- *
- * Allocate a hostinfo pointer backed by memory with @data_size and bind it to
- * to this @hl driver and @host. If @data_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 = kzalloc(sizeof(*hi) + data_size, GFP_ATOMIC);
- if (!hi)
- return NULL;
-
- 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;
-}
-
-/**
- * hpsb_set_hostinfo - set the hostinfo pointer to something useful
- *
- * Usually follows a call to hpsb_create_hostinfo, where the size is 0.
- */
-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;
-}
-
-/**
- * hpsb_destroy_hostinfo - free and remove a hostinfo pointer
- *
- * Free and remove the hostinfo pointer bound to this @hl driver and @host.
- */
-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;
-}
-
-/**
- * hpsb_set_hostinfo_key - set an alternate lookup key for an hostinfo
- *
- * Sets an alternate lookup key for the hostinfo bound to this @hl driver and
- * @host.
- */
-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;
-}
-
-/**
- * hpsb_get_hostinfo_bykey - retrieve a hostinfo pointer by its alternate key
- */
-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 && 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;
-}
-
-/**
- * hpsb_register_highlevel - register highlevel driver
- *
- * The name pointer in @hl has to stay valid at all times because the string is
- * not copied.
- */
-void hpsb_register_highlevel(struct hpsb_highlevel *hl)
-{
- unsigned long flags;
-
- hpsb_init_highlevel(hl);
- INIT_LIST_HEAD(&hl->addr_list);
-
- down_write(&hl_drivers_sem);
- list_add_tail(&hl->hl_list, &hl_drivers);
- up_write(&hl_drivers_sem);
-
- write_lock_irqsave(&hl_irqs_lock, flags);
- list_add_tail(&hl->irq_list, &hl_irqs);
- write_unlock_irqrestore(&hl_irqs_lock, flags);
-
- 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 &&
- hpsb_update_config_rom_image(host) < 0)
- HPSB_ERR("Failed to generate Configuration ROM image for host "
- "%s-%d", hl->name, host->id);
-
- /* 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;
-}
-
-/**
- * hpsb_unregister_highlevel - unregister highlevel driver
- */
-void hpsb_unregister_highlevel(struct hpsb_highlevel *hl)
-{
- unsigned long flags;
-
- write_lock_irqsave(&hl_irqs_lock, flags);
- list_del(&hl->irq_list);
- write_unlock_irqrestore(&hl_irqs_lock, flags);
-
- 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);
-}
-
-/**
- * hpsb_allocate_and_register_addrspace - alloc' and reg' a host address space
- *
- * @start and @end are 48 bit pointers and have to be quadlet aligned.
- * @end points to the first address behind the handled addresses. This
- * function can be called multiple times for a single hpsb_highlevel @hl to
- * implement sparse register sets. The requested region must not overlap any
- * previously allocated region, otherwise registering will fail.
- *
- * It returns true for successful allocation. Address spaces can be
- * unregistered with hpsb_unregister_addrspace. All remaining address spaces
- * are automatically deallocated together with the hpsb_highlevel @hl.
- */
-u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
- struct hpsb_host *host,
- const 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 = CSR1212_INVALID_ADDR_SPACE;
- unsigned long flags;
- u64 align_mask = ~(alignment - 1);
-
- if ((alignment & 3) || (alignment > 0x800000000000ULL) ||
- (hweight64(alignment) != 1)) {
- HPSB_ERR("%s called with invalid alignment: 0x%048llx",
- __func__, (unsigned long long)alignment);
- return retval;
- }
-
- /* default range,
- * avoids controller's posted write area (see OHCI 1.1 clause 1.5) */
- if (start == CSR1212_INVALID_ADDR_SPACE &&
- end == CSR1212_INVALID_ADDR_SPACE) {
- start = host->middle_addr_space;
- end = CSR1212_ALL_SPACE_END;
- }
-
- if (((start|end) & ~align_mask) || (start >= end) ||
- (end > CSR1212_ALL_SPACE_END)) {
- HPSB_ERR("%s called with invalid addresses "
- "(start = %012Lx end = %012Lx)", __func__,
- (unsigned long long)start,(unsigned long long)end);
- return retval;
- }
-
- as = kmalloc(sizeof(*as), GFP_KERNEL);
- if (!as)
- 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 == CSR1212_INVALID_ADDR_SPACE)
- kfree(as);
- return retval;
-}
-
-/**
- * hpsb_register_addrspace - register a host address space
- *
- * @start and @end are 48 bit pointers and have to be quadlet aligned.
- * @end points to the first address behind the handled addresses. This
- * function can be called multiple times for a single hpsb_highlevel @hl to
- * implement sparse register sets. The requested region must not overlap any
- * previously allocated region, otherwise registering will fail.
- *
- * It returns true for successful allocation. Address spaces can be
- * unregistered with hpsb_unregister_addrspace. All remaining address spaces
- * are automatically deallocated together with the hpsb_highlevel @hl.
- */
-int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
- const 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 > CSR1212_ALL_SPACE_END)) {
- HPSB_ERR("%s called with invalid addresses", __func__);
- return 0;
- }
-
- as = kmalloc(sizeof(*as), GFP_KERNEL);
- if (!as)
- 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;
-}
-
-static const struct hpsb_address_ops dummy_ops;
-
-/* dummy address spaces as lower and upper bounds of the host's a.s. list */
-static void init_hpsb_highlevel(struct hpsb_host *host)
-{
- INIT_LIST_HEAD(&host->dummy_zero_addr.host_list);
- INIT_LIST_HEAD(&host->dummy_zero_addr.hl_list);
- INIT_LIST_HEAD(&host->dummy_max_addr.host_list);
- INIT_LIST_HEAD(&host->dummy_max_addr.hl_list);
-
- host->dummy_zero_addr.op = host->dummy_max_addr.op = &dummy_ops;
-
- host->dummy_zero_addr.start = host->dummy_zero_addr.end = 0;
- host->dummy_max_addr.start = host->dummy_max_addr.end = ((u64) 1) << 48;
-
- list_add_tail(&host->dummy_zero_addr.host_list, &host->addr_space);
- list_add_tail(&host->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 && 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)
-{
- unsigned long flags;
- struct hpsb_highlevel *hl;
-
- read_lock_irqsave(&hl_irqs_lock, flags);
- list_for_each_entry(hl, &hl_irqs, irq_list) {
- if (hl->host_reset)
- hl->host_reset(host);
- }
- read_unlock_irqrestore(&hl_irqs_lock, flags);
-}
-
-void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
- void *data, size_t length)
-{
- unsigned long flags;
- struct hpsb_highlevel *hl;
- int cts = ((quadlet_t *)data)[0] >> 4;
-
- read_lock_irqsave(&hl_irqs_lock, flags);
- list_for_each_entry(hl, &hl_irqs, irq_list) {
- if (hl->fcp_request)
- hl->fcp_request(host, nodeid, direction, cts, data,
- length);
- }
- read_unlock_irqrestore(&hl_irqs_lock, flags);
-}
-
-/*
- * highlevel_read, highlevel_write, highlevel_lock, highlevel_lock64:
- *
- * These functions are called to handle transactions. They are called when a
- * packet arrives. The flags argument contains the second word of the first
- * header quadlet of the incoming packet (containing transaction label, retry
- * code, transaction code and priority). These functions either return a
- * response code or a negative number. In the first case a response will be
- * generated. In the latter case, no response will be sent and the driver which
- * handled the request will send the response itself.
- */
-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;
-}
projects / mv-sheeva.git / blobdiff