[deliverable/linux.git] / drivers / ieee1394 / highlevel.c

/*
 * 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);

/* 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);

	return hi ? hi->data : 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 = 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;
}

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 && 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)
{
	unsigned long flags;

	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_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;
}

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);
}

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 = 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",
			 __FUNCTION__, (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)", __FUNCTION__,
			 (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;
}

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 > CSR1212_ALL_SPACE_END)) {
		HPSB_ERR("%s called with invalid addresses", __FUNCTION__);
		return 0;
	}

	as = kmalloc(sizeof(*as), GFP_ATOMIC);
	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;
}

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 && 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_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)
{
	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);
}

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;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* IEEE 1394 for Linux
	3	*
	4	* Copyright (C) 1999 Andreas E. Bombe
	5	*
	6	* This code is licensed under the GPL. See the file COPYING in the root
	7	* directory of the kernel sources for details.
	8	*
	9	*
	10	* Contributions:
	11	*
	12	* Christian Toegel <christian.toegel@gmx.at>
	13	* unregister address space
	14	*
	15	* Manfred Weihs <weihs@ict.tuwien.ac.at>
	16	* unregister address space
	17	*
	18	*/
	19
1da177e4 LT	20	#include <linux/slab.h>
	21	#include <linux/list.h>
	22	#include <linux/bitops.h>
	23
	24	#include "ieee1394.h"
	25	#include "ieee1394_types.h"
	26	#include "hosts.h"
	27	#include "ieee1394_core.h"
	28	#include "highlevel.h"
	29	#include "nodemgr.h"
	30
	31
	32	struct hl_host_info {
	33	struct list_head list;
	34	struct hpsb_host *host;
	35	size_t size;
	36	unsigned long key;
	37	void *data;
	38	};
	39
	40
	41	static LIST_HEAD(hl_drivers);
	42	static DECLARE_RWSEM(hl_drivers_sem);
	43
	44	static LIST_HEAD(hl_irqs);
	45	static DEFINE_RWLOCK(hl_irqs_lock);
	46
	47	static DEFINE_RWLOCK(addr_space_lock);
	48
	49	/* addr_space list will have zero and max already included as bounds */
	50	static struct hpsb_address_ops dummy_ops = { NULL, NULL, NULL, NULL };
	51	static struct hpsb_address_serve dummy_zero_addr, dummy_max_addr;
	52
	53
	54	static struct hl_host_info hl_get_hostinfo(struct hpsb_highlevel hl,
2c4b69bd	55	struct hpsb_host *host)
1da177e4 LT	56	{
	57	struct hl_host_info *hi = NULL;
	58
	59	if (!hl \|\| !host)
	60	return NULL;
	61
	62	read_lock(&hl->host_info_lock);
	63	list_for_each_entry(hi, &hl->host_info_list, list) {
	64	if (hi->host == host) {
	65	read_unlock(&hl->host_info_lock);
	66	return hi;
	67	}
	68	}
	69	read_unlock(&hl->host_info_lock);
1da177e4 LT	70	return NULL;
	71	}
	72
1da177e4 LT	73	/* Returns a per host/driver data structure that was previously stored by
	74	* hpsb_create_hostinfo. */
	75	void hpsb_get_hostinfo(struct hpsb_highlevel hl, struct hpsb_host *host)
	76	{
	77	struct hl_host_info *hi = hl_get_hostinfo(hl, host);
	78
2c4b69bd	79	return hi ? hi->data : NULL;
1da177e4 LT	80	}
1da177e4 LT	81
1da177e4 LT	82	/* If size is zero, then the return here is only valid for error checking */
	83	void hpsb_create_hostinfo(struct hpsb_highlevel hl, struct hpsb_host *host,
	84	size_t data_size)
	85	{
	86	struct hl_host_info *hi;
	87	void *data;
	88	unsigned long flags;
	89
	90	hi = hl_get_hostinfo(hl, host);
	91	if (hi) {
2c4b69bd BC	92	HPSB_ERR("%s called hpsb_create_hostinfo when hostinfo already"
2c4b69bd BC	93	" exists", hl->name);
1da177e4 LT	94	return NULL;
	95	}
	96
8551158a	97	hi = kzalloc(sizeof(*hi) + data_size, GFP_ATOMIC);
1da177e4 LT	98	if (!hi)
	99	return NULL;
	100
1da177e4 LT	101	if (data_size) {
	102	data = hi->data = hi + 1;
	103	hi->size = data_size;
	104	} else
	105	data = hi;
	106
	107	hi->host = host;
	108
	109	write_lock_irqsave(&hl->host_info_lock, flags);
	110	list_add_tail(&hi->list, &hl->host_info_list);
	111	write_unlock_irqrestore(&hl->host_info_lock, flags);
	112
	113	return data;
	114	}
	115
1da177e4 LT	116	int hpsb_set_hostinfo(struct hpsb_highlevel hl, struct hpsb_host host,
	117	void *data)
	118	{
	119	struct hl_host_info *hi;
	120
	121	hi = hl_get_hostinfo(hl, host);
	122	if (hi) {
	123	if (!hi->size && !hi->data) {
	124	hi->data = data;
	125	return 0;
	126	} else
2c4b69bd BC	127	HPSB_ERR("%s called hpsb_set_hostinfo when hostinfo "
2c4b69bd BC	128	"already has data", hl->name);
1da177e4 LT	129	} else
	130	HPSB_ERR("%s called hpsb_set_hostinfo when no hostinfo exists",
	131	hl->name);
1da177e4 LT	132	return -EINVAL;
	133	}
	134
1da177e4 LT	135	void hpsb_destroy_hostinfo(struct hpsb_highlevel hl, struct hpsb_host host)
	136	{
	137	struct hl_host_info *hi;
	138
	139	hi = hl_get_hostinfo(hl, host);
	140	if (hi) {
	141	unsigned long flags;
	142	write_lock_irqsave(&hl->host_info_lock, flags);
	143	list_del(&hi->list);
	144	write_unlock_irqrestore(&hl->host_info_lock, flags);
	145	kfree(hi);
	146	}
1da177e4 LT	147	return;
	148	}
	149
2c4b69bd BC	150	void hpsb_set_hostinfo_key(struct hpsb_highlevel hl, struct hpsb_host host,
2c4b69bd BC	151	unsigned long key)
1da177e4 LT	152	{
	153	struct hl_host_info *hi;
	154
	155	hi = hl_get_hostinfo(hl, host);
	156	if (hi)
	157	hi->key = key;
1da177e4 LT	158	return;
	159	}
	160
1da177e4 LT	161	void hpsb_get_hostinfo_bykey(struct hpsb_highlevel hl, unsigned long key)
	162	{
	163	struct hl_host_info *hi;
	164	void *data = NULL;
	165
	166	if (!hl)
	167	return NULL;
	168
	169	read_lock(&hl->host_info_lock);
	170	list_for_each_entry(hi, &hl->host_info_list, list) {
	171	if (hi->key == key) {
	172	data = hi->data;
	173	break;
	174	}
	175	}
	176	read_unlock(&hl->host_info_lock);
1da177e4 LT	177	return data;
	178	}
	179
1da177e4 LT	180	static int highlevel_for_each_host_reg(struct hpsb_host host, void __data)
	181	{
	182	struct hpsb_highlevel *hl = __data;
	183
	184	hl->add_host(host);
	185
2c4b69bd BC	186	if (host->update_config_rom && hpsb_update_config_rom_image(host) < 0)
	187	HPSB_ERR("Failed to generate Configuration ROM image for host "
	188	"%s-%d", hl->name, host->id);
1da177e4 LT	189	return 0;
	190	}
	191
	192	void hpsb_register_highlevel(struct hpsb_highlevel *hl)
	193	{
44515193 BC	194	unsigned long flags;
44515193 BC	195
2c4b69bd	196	INIT_LIST_HEAD(&hl->addr_list);
1da177e4 LT	197	INIT_LIST_HEAD(&hl->host_info_list);
	198
	199	rwlock_init(&hl->host_info_lock);
	200
	201	down_write(&hl_drivers_sem);
2c4b69bd	202	list_add_tail(&hl->hl_list, &hl_drivers);
1da177e4 LT	203	up_write(&hl_drivers_sem);
1da177e4 LT	204
44515193	205	write_lock_irqsave(&hl_irqs_lock, flags);
1da177e4	206	list_add_tail(&hl->irq_list, &hl_irqs);
44515193	207	write_unlock_irqrestore(&hl_irqs_lock, flags);
1da177e4 LT	208
	209	if (hl->add_host)
	210	nodemgr_for_each_host(hl, highlevel_for_each_host_reg);
2c4b69bd	211	return;
1da177e4 LT	212	}
	213
	214	static void __delete_addr(struct hpsb_address_serve *as)
	215	{
	216	list_del(&as->host_list);
	217	list_del(&as->hl_list);
	218	kfree(as);
	219	}
	220
2c4b69bd BC	221	static void __unregister_host(struct hpsb_highlevel hl, struct hpsb_host host,
2c4b69bd BC	222	int update_cr)
1da177e4 LT	223	{
	224	unsigned long flags;
	225	struct list_head lh, next;
	226	struct hpsb_address_serve *as;
	227
	228	/* First, let the highlevel driver unreg */
	229	if (hl->remove_host)
	230	hl->remove_host(host);
	231
	232	/* Remove any addresses that are matched for this highlevel driver
	233	* and this particular host. */
	234	write_lock_irqsave(&addr_space_lock, flags);
	235	list_for_each_safe (lh, next, &hl->addr_list) {
	236	as = list_entry(lh, struct hpsb_address_serve, hl_list);
1da177e4 LT	237	if (as->host == host)
	238	__delete_addr(as);
	239	}
	240	write_unlock_irqrestore(&addr_space_lock, flags);
	241
	242	/* Now update the config-rom to reflect anything removed by the
	243	* highlevel driver. */
2c4b69bd BC	244	if (update_cr && host->update_config_rom &&
	245	hpsb_update_config_rom_image(host) < 0)
	246	HPSB_ERR("Failed to generate Configuration ROM image for host "
	247	"%s-%d", hl->name, host->id);
1da177e4	248
2c4b69bd	249	/* Finally remove all the host info associated between these two. */
1da177e4 LT	250	hpsb_destroy_hostinfo(hl, host);
	251	}
	252
	253	static int highlevel_for_each_host_unreg(struct hpsb_host host, void __data)
	254	{
	255	struct hpsb_highlevel *hl = __data;
	256
	257	__unregister_host(hl, host, 1);
1da177e4 LT	258	return 0;
	259	}
	260
	261	void hpsb_unregister_highlevel(struct hpsb_highlevel *hl)
	262	{
44515193 BC	263	unsigned long flags;
	264
	265	write_lock_irqsave(&hl_irqs_lock, flags);
1da177e4	266	list_del(&hl->irq_list);
44515193	267	write_unlock_irqrestore(&hl_irqs_lock, flags);
1da177e4 LT	268
1da177e4 LT	269	down_write(&hl_drivers_sem);
2c4b69bd	270	list_del(&hl->hl_list);
1da177e4 LT	271	up_write(&hl_drivers_sem);
	272
	273	nodemgr_for_each_host(hl, highlevel_for_each_host_unreg);
	274	}
	275
	276	u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
	277	struct hpsb_host *host,
	278	struct hpsb_address_ops *ops,
	279	u64 size, u64 alignment,
	280	u64 start, u64 end)
	281	{
	282	struct hpsb_address_serve as, a1, *a2;
	283	struct list_head *entry;
6737231e	284	u64 retval = CSR1212_INVALID_ADDR_SPACE;
1da177e4 LT	285	unsigned long flags;
	286	u64 align_mask = ~(alignment - 1);
	287
	288	if ((alignment & 3) \|\| (alignment > 0x800000000000ULL) \|\|
37d54111	289	(hweight64(alignment) != 1)) {
1da177e4 LT	290	HPSB_ERR("%s called with invalid alignment: 0x%048llx",
	291	__FUNCTION__, (unsigned long long)alignment);
	292	return retval;
	293	}
	294
8aef63ff BC	295	/* default range,
8aef63ff BC	296	* avoids controller's posted write area (see OHCI 1.1 clause 1.5) */
6737231e BC	297	if (start == CSR1212_INVALID_ADDR_SPACE &&
6737231e BC	298	end == CSR1212_INVALID_ADDR_SPACE) {
8aef63ff	299	start = host->middle_addr_space;
6737231e	300	end = CSR1212_ALL_SPACE_END;
1da177e4 LT	301	}
1da177e4 LT	302
2c4b69bd BC	303	if (((start\|end) & ~align_mask) \|\| (start >= end) \|\|
	304	(end > CSR1212_ALL_SPACE_END)) {
	305	HPSB_ERR("%s called with invalid addresses "
	306	"(start = %012Lx end = %012Lx)", __FUNCTION__,
	307	(unsigned long long)start,(unsigned long long)end);
1da177e4 LT	308	return retval;
	309	}
	310
8551158a SR	311	as = kmalloc(sizeof(*as), GFP_KERNEL);
8551158a SR	312	if (!as)
1da177e4	313	return retval;
1da177e4 LT	314
	315	INIT_LIST_HEAD(&as->host_list);
	316	INIT_LIST_HEAD(&as->hl_list);
	317	as->op = ops;
	318	as->host = host;
	319
	320	write_lock_irqsave(&addr_space_lock, flags);
1da177e4 LT	321	list_for_each(entry, &host->addr_space) {
	322	u64 a1sa, a1ea;
	323	u64 a2sa, a2ea;
	324
	325	a1 = list_entry(entry, struct hpsb_address_serve, host_list);
2c4b69bd BC	326	a2 = list_entry(entry->next, struct hpsb_address_serve,
2c4b69bd BC	327	host_list);
1da177e4 LT	328
	329	a1sa = a1->start & align_mask;
	330	a1ea = (a1->end + alignment -1) & align_mask;
	331	a2sa = a2->start & align_mask;
	332	a2ea = (a2->end + alignment -1) & align_mask;
	333
2c4b69bd BC	334	if ((a2sa - a1ea >= size) && (a2sa - start >= size) &&
2c4b69bd BC	335	(a2sa > start)) {
1da177e4 LT	336	as->start = max(start, a1ea);
	337	as->end = as->start + size;
	338	list_add(&as->host_list, entry);
	339	list_add_tail(&as->hl_list, &hl->addr_list);
	340	retval = as->start;
	341	break;
	342	}
	343	}
1da177e4 LT	344	write_unlock_irqrestore(&addr_space_lock, flags);
1da177e4 LT	345
2c4b69bd	346	if (retval == CSR1212_INVALID_ADDR_SPACE)
1da177e4	347	kfree(as);
1da177e4 LT	348	return retval;
	349	}
	350
	351	int hpsb_register_addrspace(struct hpsb_highlevel hl, struct hpsb_host host,
2c4b69bd	352	struct hpsb_address_ops *ops, u64 start, u64 end)
1da177e4	353	{
2c4b69bd	354	struct hpsb_address_serve *as;
1da177e4	355	struct list_head *lh;
2c4b69bd BC	356	int retval = 0;
2c4b69bd BC	357	unsigned long flags;
1da177e4	358
2c4b69bd BC	359	if (((start\|end) & 3) \|\| (start >= end) \|\|
	360	(end > CSR1212_ALL_SPACE_END)) {
	361	HPSB_ERR("%s called with invalid addresses", __FUNCTION__);
	362	return 0;
	363	}
1da177e4	364
8551158a SR	365	as = kmalloc(sizeof(*as), GFP_ATOMIC);
	366	if (!as)
	367	return 0;
1da177e4	368
2c4b69bd BC	369	INIT_LIST_HEAD(&as->host_list);
	370	INIT_LIST_HEAD(&as->hl_list);
	371	as->op = ops;
	372	as->start = start;
	373	as->end = end;
1da177e4 LT	374	as->host = host;
	375
	376	write_lock_irqsave(&addr_space_lock, flags);
1da177e4 LT	377	list_for_each(lh, &host->addr_space) {
	378	struct hpsb_address_serve *as_this =
	379	list_entry(lh, struct hpsb_address_serve, host_list);
	380	struct hpsb_address_serve *as_next =
2c4b69bd BC	381	list_entry(lh->next, struct hpsb_address_serve,
2c4b69bd BC	382	host_list);
1da177e4 LT	383
	384	if (as_this->end > as->start)
	385	break;
	386
	387	if (as_next->start >= as->end) {
	388	list_add(&as->host_list, lh);
	389	list_add_tail(&as->hl_list, &hl->addr_list);
	390	retval = 1;
	391	break;
	392	}
	393	}
	394	write_unlock_irqrestore(&addr_space_lock, flags);
	395
	396	if (retval == 0)
	397	kfree(as);
2c4b69bd	398	return retval;
1da177e4 LT	399	}
	400
	401	int hpsb_unregister_addrspace(struct hpsb_highlevel hl, struct hpsb_host host,
2c4b69bd	402	u64 start)
1da177e4	403	{
2c4b69bd BC	404	int retval = 0;
	405	struct hpsb_address_serve *as;
	406	struct list_head lh, next;
	407	unsigned long flags;
1da177e4	408
2c4b69bd	409	write_lock_irqsave(&addr_space_lock, flags);
1da177e4	410	list_for_each_safe (lh, next, &hl->addr_list) {
2c4b69bd BC	411	as = list_entry(lh, struct hpsb_address_serve, hl_list);
2c4b69bd BC	412	if (as->start == start && as->host == host) {
1da177e4	413	__delete_addr(as);
2c4b69bd BC	414	retval = 1;
	415	break;
	416	}
	417	}
	418	write_unlock_irqrestore(&addr_space_lock, flags);
	419	return retval;
1da177e4 LT	420	}
	421
	422	int hpsb_listen_channel(struct hpsb_highlevel hl, struct hpsb_host host,
2c4b69bd	423	unsigned int channel)
1da177e4	424	{
2c4b69bd BC	425	if (channel > 63) {
	426	HPSB_ERR("%s called with invalid channel", __FUNCTION__);
	427	return -EINVAL;
	428	}
	429	if (host->iso_listen_count[channel]++ == 0)
	430	return host->driver->devctl(host, ISO_LISTEN_CHANNEL, channel);
1da177e4 LT	431	return 0;
	432	}
	433
	434	void hpsb_unlisten_channel(struct hpsb_highlevel hl, struct hpsb_host host,
2c4b69bd	435	unsigned int channel)
1da177e4	436	{
2c4b69bd BC	437	if (channel > 63) {
	438	HPSB_ERR("%s called with invalid channel", __FUNCTION__);
	439	return;
	440	}
	441	if (--host->iso_listen_count[channel] == 0)
	442	host->driver->devctl(host, ISO_UNLISTEN_CHANNEL, channel);
1da177e4 LT	443	}
	444
	445	static void init_hpsb_highlevel(struct hpsb_host *host)
	446	{
	447	INIT_LIST_HEAD(&dummy_zero_addr.host_list);
	448	INIT_LIST_HEAD(&dummy_zero_addr.hl_list);
	449	INIT_LIST_HEAD(&dummy_max_addr.host_list);
	450	INIT_LIST_HEAD(&dummy_max_addr.hl_list);
	451
	452	dummy_zero_addr.op = dummy_max_addr.op = &dummy_ops;
	453
	454	dummy_zero_addr.start = dummy_zero_addr.end = 0;
	455	dummy_max_addr.start = dummy_max_addr.end = ((u64) 1) << 48;
	456
	457	list_add_tail(&dummy_zero_addr.host_list, &host->addr_space);
	458	list_add_tail(&dummy_max_addr.host_list, &host->addr_space);
	459	}
	460
	461	void highlevel_add_host(struct hpsb_host *host)
	462	{
2c4b69bd	463	struct hpsb_highlevel *hl;
1da177e4 LT	464
	465	init_hpsb_highlevel(host);
	466
	467	down_read(&hl_drivers_sem);
2c4b69bd	468	list_for_each_entry(hl, &hl_drivers, hl_list) {
1da177e4 LT	469	if (hl->add_host)
1da177e4 LT	470	hl->add_host(host);
1da177e4	471	}
2c4b69bd BC	472	up_read(&hl_drivers_sem);
	473	if (host->update_config_rom && hpsb_update_config_rom_image(host) < 0)
	474	HPSB_ERR("Failed to generate Configuration ROM image for host "
	475	"%s-%d", hl->name, host->id);
1da177e4 LT	476	}
	477
	478	void highlevel_remove_host(struct hpsb_host *host)
	479	{
2c4b69bd	480	struct hpsb_highlevel *hl;
1da177e4 LT	481
	482	down_read(&hl_drivers_sem);
	483	list_for_each_entry(hl, &hl_drivers, hl_list)
	484	__unregister_host(hl, host, 0);
	485	up_read(&hl_drivers_sem);
	486	}
	487
	488	void highlevel_host_reset(struct hpsb_host *host)
	489	{
44515193	490	unsigned long flags;
2c4b69bd	491	struct hpsb_highlevel *hl;
1da177e4	492
44515193	493	read_lock_irqsave(&hl_irqs_lock, flags);
1da177e4	494	list_for_each_entry(hl, &hl_irqs, irq_list) {
2c4b69bd BC	495	if (hl->host_reset)
	496	hl->host_reset(host);
	497	}
44515193	498	read_unlock_irqrestore(&hl_irqs_lock, flags);
1da177e4 LT	499	}
	500
	501	void highlevel_iso_receive(struct hpsb_host host, void data, size_t length)
	502	{
44515193	503	unsigned long flags;
2c4b69bd BC	504	struct hpsb_highlevel *hl;
2c4b69bd BC	505	int channel = (((quadlet_t *)data)[0] >> 8) & 0x3f;
1da177e4	506
2c4b69bd	507	read_lock_irqsave(&hl_irqs_lock, flags);
1da177e4	508	list_for_each_entry(hl, &hl_irqs, irq_list) {
2c4b69bd BC	509	if (hl->iso_receive)
	510	hl->iso_receive(host, channel, data, length);
	511	}
	512	read_unlock_irqrestore(&hl_irqs_lock, flags);
1da177e4 LT	513	}
	514
	515	void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
	516	void *data, size_t length)
	517	{
44515193	518	unsigned long flags;
2c4b69bd BC	519	struct hpsb_highlevel *hl;
2c4b69bd BC	520	int cts = ((quadlet_t *)data)[0] >> 4;
1da177e4	521
2c4b69bd	522	read_lock_irqsave(&hl_irqs_lock, flags);
1da177e4	523	list_for_each_entry(hl, &hl_irqs, irq_list) {
2c4b69bd BC	524	if (hl->fcp_request)
2c4b69bd BC	525	hl->fcp_request(host, nodeid, direction, cts, data,
1da177e4	526	length);
2c4b69bd BC	527	}
2c4b69bd BC	528	read_unlock_irqrestore(&hl_irqs_lock, flags);
1da177e4 LT	529	}
1da177e4 LT	530
2c4b69bd BC	531	int highlevel_read(struct hpsb_host host, int nodeid, void data, u64 addr,
2c4b69bd BC	532	unsigned int length, u16 flags)
1da177e4	533	{
2c4b69bd BC	534	struct hpsb_address_serve *as;
	535	unsigned int partlength;
	536	int rcode = RCODE_ADDRESS_ERROR;
1da177e4	537
2c4b69bd	538	read_lock(&addr_space_lock);
1da177e4 LT	539	list_for_each_entry(as, &host->addr_space, host_list) {
	540	if (as->start > addr)
	541	break;
	542
2c4b69bd BC	543	if (as->end > addr) {
2c4b69bd BC	544	partlength = min(as->end - addr, (u64) length);
1da177e4	545
2c4b69bd BC	546	if (as->op->read)
2c4b69bd BC	547	rcode = as->op->read(host, nodeid, data,
1da177e4	548	addr, partlength, flags);
2c4b69bd BC	549	else
2c4b69bd BC	550	rcode = RCODE_TYPE_ERROR;
1da177e4 LT	551
1da177e4 LT	552	data += partlength;
2c4b69bd BC	553	length -= partlength;
2c4b69bd BC	554	addr += partlength;
1da177e4	555
2c4b69bd BC	556	if ((rcode != RCODE_COMPLETE) \|\| !length)
	557	break;
	558	}
	559	}
	560	read_unlock(&addr_space_lock);
1da177e4	561
2c4b69bd BC	562	if (length && (rcode == RCODE_COMPLETE))
	563	rcode = RCODE_ADDRESS_ERROR;
	564	return rcode;
1da177e4 LT	565	}
1da177e4 LT	566
2c4b69bd BC	567	int highlevel_write(struct hpsb_host host, int nodeid, int destid, void data,
2c4b69bd BC	568	u64 addr, unsigned int length, u16 flags)
1da177e4	569	{
2c4b69bd BC	570	struct hpsb_address_serve *as;
	571	unsigned int partlength;
	572	int rcode = RCODE_ADDRESS_ERROR;
1da177e4	573
2c4b69bd	574	read_lock(&addr_space_lock);
1da177e4 LT	575	list_for_each_entry(as, &host->addr_space, host_list) {
	576	if (as->start > addr)
	577	break;
	578
2c4b69bd BC	579	if (as->end > addr) {
2c4b69bd BC	580	partlength = min(as->end - addr, (u64) length);
1da177e4	581
2c4b69bd BC	582	if (as->op->write)
	583	rcode = as->op->write(host, nodeid, destid,
	584	data, addr, partlength,
	585	flags);
	586	else
	587	rcode = RCODE_TYPE_ERROR;
1da177e4 LT	588
1da177e4 LT	589	data += partlength;
2c4b69bd BC	590	length -= partlength;
2c4b69bd BC	591	addr += partlength;
1da177e4	592
2c4b69bd BC	593	if ((rcode != RCODE_COMPLETE) \|\| !length)
	594	break;
	595	}
	596	}
	597	read_unlock(&addr_space_lock);
1da177e4	598
2c4b69bd BC	599	if (length && (rcode == RCODE_COMPLETE))
	600	rcode = RCODE_ADDRESS_ERROR;
	601	return rcode;
1da177e4 LT	602	}
1da177e4 LT	603
1da177e4	604	int highlevel_lock(struct hpsb_host host, int nodeid, quadlet_t store,
2c4b69bd BC	605	u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
2c4b69bd BC	606	u16 flags)
1da177e4	607	{
2c4b69bd BC	608	struct hpsb_address_serve *as;
2c4b69bd BC	609	int rcode = RCODE_ADDRESS_ERROR;
1da177e4	610
2c4b69bd	611	read_lock(&addr_space_lock);
1da177e4 LT	612	list_for_each_entry(as, &host->addr_space, host_list) {
	613	if (as->start > addr)
	614	break;
	615
2c4b69bd BC	616	if (as->end > addr) {
	617	if (as->op->lock)
	618	rcode = as->op->lock(host, nodeid, store, addr,
	619	data, arg, ext_tcode,
	620	flags);
	621	else
	622	rcode = RCODE_TYPE_ERROR;
	623	break;
	624	}
	625	}
	626	read_unlock(&addr_space_lock);
	627	return rcode;
1da177e4 LT	628	}
	629
	630	int highlevel_lock64(struct hpsb_host host, int nodeid, octlet_t store,
2c4b69bd BC	631	u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
2c4b69bd BC	632	u16 flags)
1da177e4	633	{
2c4b69bd BC	634	struct hpsb_address_serve *as;
2c4b69bd BC	635	int rcode = RCODE_ADDRESS_ERROR;
1da177e4	636
2c4b69bd	637	read_lock(&addr_space_lock);
1da177e4 LT	638
	639	list_for_each_entry(as, &host->addr_space, host_list) {
	640	if (as->start > addr)
	641	break;
	642
2c4b69bd BC	643	if (as->end > addr) {
	644	if (as->op->lock64)
	645	rcode = as->op->lock64(host, nodeid, store,
	646	addr, data, arg,
	647	ext_tcode, flags);
	648	else
	649	rcode = RCODE_TYPE_ERROR;
	650	break;
	651	}
	652	}
	653	read_unlock(&addr_space_lock);
	654	return rcode;
1da177e4	655	}