0e930f437e
struct hpsb_highlevel's struct module *owner is neither used by the IEEE 1394 core nor set by any of the in-tree drivers or the two out-of-tree highlevel drivers I know about (dfg1394, mem1394) --- nor is this member documented. An unscheduled removal seems acceptable. Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
197 lines
7.8 KiB
C
197 lines
7.8 KiB
C
#ifndef IEEE1394_HIGHLEVEL_H
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#define IEEE1394_HIGHLEVEL_H
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#include <linux/list.h>
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#include <linux/spinlock_types.h>
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#include <linux/types.h>
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struct module;
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#include "ieee1394_types.h"
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struct hpsb_host;
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/* internal to ieee1394 core */
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struct hpsb_address_serve {
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struct list_head host_list; /* per host list */
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struct list_head hl_list; /* hpsb_highlevel list */
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struct hpsb_address_ops *op;
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struct hpsb_host *host;
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u64 start; /* first address handled, quadlet aligned */
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u64 end; /* first address behind, quadlet aligned */
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};
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/* Only the following structures are of interest to actual highlevel drivers. */
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struct hpsb_highlevel {
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const char *name;
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/* Any of the following pointers can legally be NULL, except for
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* iso_receive which can only be NULL when you don't request
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* channels. */
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/* New host initialized. Will also be called during
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* hpsb_register_highlevel for all hosts already installed. */
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void (*add_host)(struct hpsb_host *host);
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/* Host about to be removed. Will also be called during
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* hpsb_unregister_highlevel once for each host. */
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void (*remove_host)(struct hpsb_host *host);
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/* Host experienced bus reset with possible configuration changes.
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* Note that this one may occur during interrupt/bottom half handling.
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* You can not expect to be able to do stock hpsb_reads. */
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void (*host_reset)(struct hpsb_host *host);
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/* An isochronous packet was received. Channel contains the channel
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* number for your convenience, it is also contained in the included
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* packet header (first quadlet, CRCs are missing). You may get called
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* for channel/host combinations you did not request. */
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void (*iso_receive)(struct hpsb_host *host, int channel,
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quadlet_t *data, size_t length);
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/* A write request was received on either the FCP_COMMAND (direction =
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* 0) or the FCP_RESPONSE (direction = 1) register. The cts arg
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* contains the cts field (first byte of data). */
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void (*fcp_request)(struct hpsb_host *host, int nodeid, int direction,
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int cts, u8 *data, size_t length);
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/* These are initialized by the subsystem when the
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* hpsb_higlevel is registered. */
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struct list_head hl_list;
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struct list_head irq_list;
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struct list_head addr_list;
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struct list_head host_info_list;
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rwlock_t host_info_lock;
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};
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struct hpsb_address_ops {
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/*
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* Null function pointers will make the respective operation complete
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* with RCODE_TYPE_ERROR. Makes for easy to implement read-only
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* registers (just leave everything but read NULL).
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*
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* All functions shall return appropriate IEEE 1394 rcodes.
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*/
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/* These functions have to implement block reads for themselves.
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*
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* These functions either return a response code or a negative number.
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* In the first case a response will be generated. In the latter case,
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* no response will be sent and the driver which handled the request
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* will send the response itself. */
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int (*read)(struct hpsb_host *host, int nodeid, quadlet_t *buffer,
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u64 addr, size_t length, u16 flags);
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int (*write)(struct hpsb_host *host, int nodeid, int destid,
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quadlet_t *data, u64 addr, size_t length, u16 flags);
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/* Lock transactions: write results of ext_tcode operation into
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* *store. */
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int (*lock)(struct hpsb_host *host, int nodeid, quadlet_t *store,
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u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
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u16 flags);
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int (*lock64)(struct hpsb_host *host, int nodeid, octlet_t *store,
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u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
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u16 flags);
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};
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void highlevel_add_host(struct hpsb_host *host);
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void highlevel_remove_host(struct hpsb_host *host);
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void highlevel_host_reset(struct hpsb_host *host);
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/*
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* These functions are called to handle transactions. They are called when a
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* packet arrives. The flags argument contains the second word of the first
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* header quadlet of the incoming packet (containing transaction label, retry
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* code, transaction code and priority). These functions either return a
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* response code or a negative number. In the first case a response will be
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* generated. In the latter case, no response will be sent and the driver which
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* handled the request will send the response itself.
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*/
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int highlevel_read(struct hpsb_host *host, int nodeid, void *data, u64 addr,
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unsigned int length, u16 flags);
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int highlevel_write(struct hpsb_host *host, int nodeid, int destid, void *data,
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u64 addr, unsigned int length, u16 flags);
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int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
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u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
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u16 flags);
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int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store,
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u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
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u16 flags);
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void highlevel_iso_receive(struct hpsb_host *host, void *data, size_t length);
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void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
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void *data, size_t length);
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/*
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* Register highlevel driver. The name pointer has to stay valid at all times
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* because the string is not copied.
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*/
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void hpsb_register_highlevel(struct hpsb_highlevel *hl);
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void hpsb_unregister_highlevel(struct hpsb_highlevel *hl);
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/*
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* Register handlers for host address spaces. Start and end are 48 bit pointers
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* and have to be quadlet aligned. Argument "end" points to the first address
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* behind the handled addresses. This function can be called multiple times for
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* a single hpsb_highlevel to implement sparse register sets. The requested
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* region must not overlap any previously allocated region, otherwise
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* registering will fail.
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*
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* It returns true for successful allocation. Address spaces can be
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* unregistered with hpsb_unregister_addrspace. All remaining address spaces
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* are automatically deallocated together with the hpsb_highlevel.
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*/
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u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
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struct hpsb_host *host,
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struct hpsb_address_ops *ops,
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u64 size, u64 alignment,
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u64 start, u64 end);
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int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
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struct hpsb_address_ops *ops, u64 start, u64 end);
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int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
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u64 start);
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/*
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* Enable or disable receving a certain isochronous channel through the
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* iso_receive op.
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*/
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int hpsb_listen_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
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unsigned int channel);
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void hpsb_unlisten_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
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unsigned int channel);
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/* Retrieve a hostinfo pointer bound to this driver/host */
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void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host);
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/* Allocate a hostinfo pointer of data_size bound to this driver/host */
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void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
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size_t data_size);
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/* Free and remove the hostinfo pointer bound to this driver/host */
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void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host);
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/* Set an alternate lookup key for the hostinfo bound to this driver/host */
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void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host,
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unsigned long key);
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/* Retrieve the alternate lookup key for the hostinfo bound to this
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* driver/host */
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unsigned long hpsb_get_hostinfo_key(struct hpsb_highlevel *hl,
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struct hpsb_host *host);
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/* Retrieve a hostinfo pointer bound to this driver using its alternate key */
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void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key);
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/* Set the hostinfo pointer to something useful. Usually follows a call to
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* hpsb_create_hostinfo, where the size is 0. */
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int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
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void *data);
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/* Retrieve hpsb_host using a highlevel handle and a key */
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struct hpsb_host *hpsb_get_host_bykey(struct hpsb_highlevel *hl,
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unsigned long key);
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#endif /* IEEE1394_HIGHLEVEL_H */
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