1 #ifndef IEEE1394_HIGHLEVEL_H
2 #define IEEE1394_HIGHLEVEL_H
4 #include <linux/list.h>
5 #include <linux/spinlock_types.h>
6 #include <linux/types.h>
10 #include "ieee1394_types.h"
14 /* internal to ieee1394 core */
15 struct hpsb_address_serve {
16 struct list_head host_list; /* per host list */
17 struct list_head hl_list; /* hpsb_highlevel list */
18 struct hpsb_address_ops *op;
19 struct hpsb_host *host;
20 u64 start; /* first address handled, quadlet aligned */
21 u64 end; /* first address behind, quadlet aligned */
24 /* Only the following structures are of interest to actual highlevel drivers. */
26 struct hpsb_highlevel {
29 /* Any of the following pointers can legally be NULL, except for
30 * iso_receive which can only be NULL when you don't request
33 /* New host initialized. Will also be called during
34 * hpsb_register_highlevel for all hosts already installed. */
35 void (*add_host)(struct hpsb_host *host);
37 /* Host about to be removed. Will also be called during
38 * hpsb_unregister_highlevel once for each host. */
39 void (*remove_host)(struct hpsb_host *host);
41 /* Host experienced bus reset with possible configuration changes.
42 * Note that this one may occur during interrupt/bottom half handling.
43 * You can not expect to be able to do stock hpsb_reads. */
44 void (*host_reset)(struct hpsb_host *host);
46 /* An isochronous packet was received. Channel contains the channel
47 * number for your convenience, it is also contained in the included
48 * packet header (first quadlet, CRCs are missing). You may get called
49 * for channel/host combinations you did not request. */
50 void (*iso_receive)(struct hpsb_host *host, int channel,
51 quadlet_t *data, size_t length);
53 /* A write request was received on either the FCP_COMMAND (direction =
54 * 0) or the FCP_RESPONSE (direction = 1) register. The cts arg
55 * contains the cts field (first byte of data). */
56 void (*fcp_request)(struct hpsb_host *host, int nodeid, int direction,
57 int cts, u8 *data, size_t length);
59 /* These are initialized by the subsystem when the
60 * hpsb_higlevel is registered. */
61 struct list_head hl_list;
62 struct list_head irq_list;
63 struct list_head addr_list;
65 struct list_head host_info_list;
66 rwlock_t host_info_lock;
69 struct hpsb_address_ops {
71 * Null function pointers will make the respective operation complete
72 * with RCODE_TYPE_ERROR. Makes for easy to implement read-only
73 * registers (just leave everything but read NULL).
75 * All functions shall return appropriate IEEE 1394 rcodes.
78 /* These functions have to implement block reads for themselves.
80 * These functions either return a response code or a negative number.
81 * In the first case a response will be generated. In the latter case,
82 * no response will be sent and the driver which handled the request
83 * will send the response itself. */
84 int (*read)(struct hpsb_host *host, int nodeid, quadlet_t *buffer,
85 u64 addr, size_t length, u16 flags);
86 int (*write)(struct hpsb_host *host, int nodeid, int destid,
87 quadlet_t *data, u64 addr, size_t length, u16 flags);
89 /* Lock transactions: write results of ext_tcode operation into
91 int (*lock)(struct hpsb_host *host, int nodeid, quadlet_t *store,
92 u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
94 int (*lock64)(struct hpsb_host *host, int nodeid, octlet_t *store,
95 u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
99 void highlevel_add_host(struct hpsb_host *host);
100 void highlevel_remove_host(struct hpsb_host *host);
101 void highlevel_host_reset(struct hpsb_host *host);
104 * These functions are called to handle transactions. They are called when a
105 * packet arrives. The flags argument contains the second word of the first
106 * header quadlet of the incoming packet (containing transaction label, retry
107 * code, transaction code and priority). These functions either return a
108 * response code or a negative number. In the first case a response will be
109 * generated. In the latter case, no response will be sent and the driver which
110 * handled the request will send the response itself.
112 int highlevel_read(struct hpsb_host *host, int nodeid, void *data, u64 addr,
113 unsigned int length, u16 flags);
114 int highlevel_write(struct hpsb_host *host, int nodeid, int destid, void *data,
115 u64 addr, unsigned int length, u16 flags);
116 int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
117 u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode,
119 int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store,
120 u64 addr, octlet_t data, octlet_t arg, int ext_tcode,
123 void highlevel_iso_receive(struct hpsb_host *host, void *data, size_t length);
124 void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
125 void *data, size_t length);
128 * Register highlevel driver. The name pointer has to stay valid at all times
129 * because the string is not copied.
131 void hpsb_register_highlevel(struct hpsb_highlevel *hl);
132 void hpsb_unregister_highlevel(struct hpsb_highlevel *hl);
135 * Register handlers for host address spaces. Start and end are 48 bit pointers
136 * and have to be quadlet aligned. Argument "end" points to the first address
137 * behind the handled addresses. This function can be called multiple times for
138 * a single hpsb_highlevel to implement sparse register sets. The requested
139 * region must not overlap any previously allocated region, otherwise
140 * registering will fail.
142 * It returns true for successful allocation. Address spaces can be
143 * unregistered with hpsb_unregister_addrspace. All remaining address spaces
144 * are automatically deallocated together with the hpsb_highlevel.
146 u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
147 struct hpsb_host *host,
148 struct hpsb_address_ops *ops,
149 u64 size, u64 alignment,
151 int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
152 struct hpsb_address_ops *ops, u64 start, u64 end);
153 int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
157 * Enable or disable receving a certain isochronous channel through the
160 int hpsb_listen_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
161 unsigned int channel);
162 void hpsb_unlisten_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
163 unsigned int channel);
165 /* Retrieve a hostinfo pointer bound to this driver/host */
166 void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host);
168 /* Allocate a hostinfo pointer of data_size bound to this driver/host */
169 void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
172 /* Free and remove the hostinfo pointer bound to this driver/host */
173 void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host);
175 /* Set an alternate lookup key for the hostinfo bound to this driver/host */
176 void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host,
179 /* Retrieve the alternate lookup key for the hostinfo bound to this
181 unsigned long hpsb_get_hostinfo_key(struct hpsb_highlevel *hl,
182 struct hpsb_host *host);
184 /* Retrieve a hostinfo pointer bound to this driver using its alternate key */
185 void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key);
187 /* Set the hostinfo pointer to something useful. Usually follows a call to
188 * hpsb_create_hostinfo, where the size is 0. */
189 int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
192 /* Retrieve hpsb_host using a highlevel handle and a key */
193 struct hpsb_host *hpsb_get_host_bykey(struct hpsb_highlevel *hl,
196 #endif /* IEEE1394_HIGHLEVEL_H */