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)
return NULL;
}
-/* Returns a per host/driver data structure that was previously stored by
- * hpsb_create_hostinfo. */
+/**
+ * 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;
}
-/* If size is zero, then the return here is only valid for error checking */
+/**
+ * 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)
{
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)
{
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;
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)
{
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;
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);
- 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);
return 0;
}
+/**
+ * hpsb_unregister_highlevel - unregister highlevel driver
+ */
void hpsb_unregister_highlevel(struct hpsb_highlevel *hl)
{
unsigned long flags;
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,
- struct hpsb_address_ops *ops,
+ const struct hpsb_address_ops *ops,
u64 size, u64 alignment,
u64 start, u64 end)
{
if ((alignment & 3) || (alignment > 0x800000000000ULL) ||
(hweight64(alignment) != 1)) {
HPSB_ERR("%s called with invalid alignment: 0x%048llx",
- __FUNCTION__, (unsigned long long)alignment);
+ __func__, (unsigned long long)alignment);
return retval;
}
if (((start|end) & ~align_mask) || (start >= end) ||
(end > CSR1212_ALL_SPACE_END)) {
HPSB_ERR("%s called with invalid addresses "
- "(start = %012Lx end = %012Lx)", __FUNCTION__,
+ "(start = %012Lx end = %012Lx)", __func__,
(unsigned long long)start,(unsigned long long)end);
return retval;
}
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,
- struct hpsb_address_ops *ops, u64 start, u64 end)
+ const struct hpsb_address_ops *ops,
+ u64 start, u64 end)
{
struct hpsb_address_serve *as;
struct list_head *lh;
if (((start|end) & 3) || (start >= end) ||
(end > CSR1212_ALL_SPACE_END)) {
- HPSB_ERR("%s called with invalid addresses", __FUNCTION__);
+ HPSB_ERR("%s called with invalid addresses", __func__);
return 0;
}
- as = kmalloc(sizeof(*as), GFP_ATOMIC);
+ as = kmalloc(sizeof(*as), GFP_KERNEL);
if (!as)
return 0;
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 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(&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);
+ 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);
- dummy_zero_addr.op = dummy_max_addr.op = &dummy_ops;
+ host->dummy_zero_addr.op = host->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;
+ 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(&dummy_zero_addr.host_list, &host->addr_space);
- list_add_tail(&dummy_max_addr.host_list, &host->addr_space);
+ 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)
read_unlock_irqrestore(&hl_irqs_lock, flags);
}
-void highlevel_iso_receive(struct hpsb_host *host, void *data, size_t length)
-{
- unsigned long flags;
- struct hpsb_highlevel *hl;
- int channel = (((quadlet_t *)data)[0] >> 8) & 0x3f;
-
- read_lock_irqsave(&hl_irqs_lock, flags);
- list_for_each_entry(hl, &hl_irqs, irq_list) {
- if (hl->iso_receive)
- hl->iso_receive(host, channel, data, length);
- }
- read_unlock_irqrestore(&hl_irqs_lock, flags);
-}
-
void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
void *data, size_t 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)
{
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff