ia64/linux-2.6.18-xen.hg

view drivers/ieee1394/highlevel.h @ 893:f994bfe9b93b

linux/blktap2: reduce TLB flush scope

c/s 885 added very coarse TLB flushing. Since these flushes always
follow single page updates, single page flushes (when available) are
sufficient.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Jun 04 10:32:57 2009 +0100 (2009-06-04)
parents 831230e53067
children
line source
2 #ifndef IEEE1394_HIGHLEVEL_H
3 #define IEEE1394_HIGHLEVEL_H
6 struct hpsb_address_serve {
7 struct list_head host_list; /* per host list */
9 struct list_head hl_list; /* hpsb_highlevel list */
11 struct hpsb_address_ops *op;
13 struct hpsb_host *host;
15 /* first address handled and first address behind, quadlet aligned */
16 u64 start, end;
17 };
20 /*
21 * The above structs are internal to highlevel driver handling. Only the
22 * following structures are of interest to actual highlevel drivers.
23 */
25 struct hpsb_highlevel {
26 struct module *owner;
27 const char *name;
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
31 * channels. */
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;
67 };
69 struct hpsb_address_ops {
70 /*
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).
74 *
75 * All functions shall return appropriate IEEE 1394 rcodes.
76 */
78 /* These functions have to implement block reads for themselves. */
79 /* These functions either return a response code
80 or a negative number. In the first case a response will be generated; in the
81 later case, no response will be sent and the driver, that handled the request
82 will send the response itself
83 */
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
90 * *store. */
91 int (*lock) (struct hpsb_host *host, int nodeid, quadlet_t *store,
92 u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode, u16 flags);
93 int (*lock64) (struct hpsb_host *host, int nodeid, octlet_t *store,
94 u64 addr, octlet_t data, octlet_t arg, int ext_tcode, u16 flags);
95 };
98 void highlevel_add_host(struct hpsb_host *host);
99 void highlevel_remove_host(struct hpsb_host *host);
100 void highlevel_host_reset(struct hpsb_host *host);
103 /* these functions are called to handle transactions. They are called, when
104 a packet arrives. The flags argument contains the second word of the first header
105 quadlet of the incoming packet (containing transaction label, retry code,
106 transaction code and priority). These functions either return a response code
107 or a negative number. In the first case a response will be generated; in the
108 later case, no response will be sent and the driver, that handled the request
109 will send the response itself.
110 */
111 int highlevel_read(struct hpsb_host *host, int nodeid, void *data,
112 u64 addr, unsigned int length, u16 flags);
113 int highlevel_write(struct hpsb_host *host, int nodeid, int destid,
114 void *data, u64 addr, unsigned int length, u16 flags);
115 int highlevel_lock(struct hpsb_host *host, int nodeid, quadlet_t *store,
116 u64 addr, quadlet_t data, quadlet_t arg, int ext_tcode, u16 flags);
117 int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store,
118 u64 addr, octlet_t data, octlet_t arg, int ext_tcode, u16 flags);
120 void highlevel_iso_receive(struct hpsb_host *host, void *data,
121 size_t length);
122 void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
123 void *data, size_t length);
126 /*
127 * Register highlevel driver. The name pointer has to stay valid at all times
128 * because the string is not copied.
129 */
130 void hpsb_register_highlevel(struct hpsb_highlevel *hl);
131 void hpsb_unregister_highlevel(struct hpsb_highlevel *hl);
133 /*
134 * Register handlers for host address spaces. Start and end are 48 bit pointers
135 * and have to be quadlet aligned (end points to the first address behind the
136 * handled addresses. This function can be called multiple times for a single
137 * hpsb_highlevel to implement sparse register sets. The requested region must
138 * not overlap any previously allocated region, otherwise registering will fail.
139 *
140 * It returns true for successful allocation. There is no unregister function,
141 * all address spaces are deallocated together with the hpsb_highlevel.
142 */
143 u64 hpsb_allocate_and_register_addrspace(struct hpsb_highlevel *hl,
144 struct hpsb_host *host,
145 struct hpsb_address_ops *ops,
146 u64 size, u64 alignment,
147 u64 start, u64 end);
148 int hpsb_register_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
149 struct hpsb_address_ops *ops, u64 start, u64 end);
151 int hpsb_unregister_addrspace(struct hpsb_highlevel *hl, struct hpsb_host *host,
152 u64 start);
154 /*
155 * Enable or disable receving a certain isochronous channel through the
156 * iso_receive op.
157 */
158 int hpsb_listen_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
159 unsigned int channel);
160 void hpsb_unlisten_channel(struct hpsb_highlevel *hl, struct hpsb_host *host,
161 unsigned int channel);
164 /* Retrieve a hostinfo pointer bound to this driver/host */
165 void *hpsb_get_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host);
167 /* Allocate a hostinfo pointer of data_size bound to this driver/host */
168 void *hpsb_create_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host,
169 size_t data_size);
171 /* Free and remove the hostinfo pointer bound to this driver/host */
172 void hpsb_destroy_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host);
174 /* Set an alternate lookup key for the hostinfo bound to this driver/host */
175 void hpsb_set_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host, unsigned long key);
177 /* Retrieve the alternate lookup key for the hostinfo bound to this driver/host */
178 unsigned long hpsb_get_hostinfo_key(struct hpsb_highlevel *hl, struct hpsb_host *host);
180 /* Retrieve a hostinfo pointer bound to this driver using its alternate key */
181 void *hpsb_get_hostinfo_bykey(struct hpsb_highlevel *hl, unsigned long key);
183 /* Set the hostinfo pointer to something useful. Usually follows a call to
184 * hpsb_create_hostinfo, where the size is 0. */
185 int hpsb_set_hostinfo(struct hpsb_highlevel *hl, struct hpsb_host *host, void *data);
187 /* Retrieve hpsb_host using a highlevel handle and a key */
188 struct hpsb_host *hpsb_get_host_bykey(struct hpsb_highlevel *hl, unsigned long key);
190 #endif /* IEEE1394_HIGHLEVEL_H */