ia64/linux-2.6.18-xen.hg

view drivers/ieee1394/hosts.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
1 #ifndef _IEEE1394_HOSTS_H
2 #define _IEEE1394_HOSTS_H
4 #include <linux/device.h>
5 #include <linux/wait.h>
6 #include <linux/list.h>
7 #include <linux/timer.h>
8 #include <linux/skbuff.h>
10 #include <asm/semaphore.h>
12 #include "ieee1394_types.h"
13 #include "csr.h"
16 struct hpsb_packet;
17 struct hpsb_iso;
19 struct hpsb_host {
20 struct list_head host_list;
22 void *hostdata;
24 atomic_t generation;
26 struct sk_buff_head pending_packet_queue;
28 struct timer_list timeout;
29 unsigned long timeout_interval;
31 unsigned char iso_listen_count[64];
33 int node_count; /* number of identified nodes on this bus */
34 int selfid_count; /* total number of SelfIDs received */
35 int nodes_active; /* number of nodes with active link layer */
36 u8 speed[ALL_NODES]; /* speed between each node and local node */
38 nodeid_t node_id; /* node ID of this host */
39 nodeid_t irm_id; /* ID of this bus' isochronous resource manager */
40 nodeid_t busmgr_id; /* ID of this bus' bus manager */
42 /* this nodes state */
43 unsigned in_bus_reset:1;
44 unsigned is_shutdown:1;
45 unsigned resume_packet_sent:1;
47 /* this nodes' duties on the bus */
48 unsigned is_root:1;
49 unsigned is_cycmst:1;
50 unsigned is_irm:1;
51 unsigned is_busmgr:1;
53 int reset_retries;
54 quadlet_t *topology_map;
55 u8 *speed_map;
56 struct csr_control csr;
58 /* Per node tlabel pool allocation */
59 struct hpsb_tlabel_pool tpool[ALL_NODES];
61 struct hpsb_host_driver *driver;
63 struct pci_dev *pdev;
65 int id;
67 struct device device;
68 struct class_device class_dev;
70 int update_config_rom;
71 struct work_struct delayed_reset;
73 unsigned int config_roms;
75 struct list_head addr_space;
76 u64 low_addr_space; /* upper bound of physical DMA area */
77 u64 middle_addr_space; /* upper bound of posted write area */
78 };
82 enum devctl_cmd {
83 /* Host is requested to reset its bus and cancel all outstanding async
84 * requests. If arg == 1, it shall also attempt to become root on the
85 * bus. Return void. */
86 RESET_BUS,
88 /* Arg is void, return value is the hardware cycle counter value. */
89 GET_CYCLE_COUNTER,
91 /* Set the hardware cycle counter to the value in arg, return void.
92 * FIXME - setting is probably not required. */
93 SET_CYCLE_COUNTER,
95 /* Configure hardware for new bus ID in arg, return void. */
96 SET_BUS_ID,
98 /* If arg true, start sending cycle start packets, stop if arg == 0.
99 * Return void. */
100 ACT_CYCLE_MASTER,
102 /* Cancel all outstanding async requests without resetting the bus.
103 * Return void. */
104 CANCEL_REQUESTS,
106 /* Start or stop receiving isochronous channel in arg. Return void.
107 * This acts as an optimization hint, hosts are not required not to
108 * listen on unrequested channels. */
109 ISO_LISTEN_CHANNEL,
110 ISO_UNLISTEN_CHANNEL
111 };
113 enum isoctl_cmd {
114 /* rawiso API - see iso.h for the meanings of these commands
115 (they correspond exactly to the hpsb_iso_* API functions)
116 * INIT = allocate resources
117 * START = begin transmission/reception
118 * STOP = halt transmission/reception
119 * QUEUE/RELEASE = produce/consume packets
120 * SHUTDOWN = deallocate resources
121 */
123 XMIT_INIT,
124 XMIT_START,
125 XMIT_STOP,
126 XMIT_QUEUE,
127 XMIT_SHUTDOWN,
129 RECV_INIT,
130 RECV_LISTEN_CHANNEL, /* multi-channel only */
131 RECV_UNLISTEN_CHANNEL, /* multi-channel only */
132 RECV_SET_CHANNEL_MASK, /* multi-channel only; arg is a *u64 */
133 RECV_START,
134 RECV_STOP,
135 RECV_RELEASE,
136 RECV_SHUTDOWN,
137 RECV_FLUSH
138 };
140 enum reset_types {
141 /* 166 microsecond reset -- only type of reset available on
142 non-1394a capable controllers */
143 LONG_RESET,
145 /* Short (arbitrated) reset -- only available on 1394a capable
146 controllers */
147 SHORT_RESET,
149 /* Variants that set force_root before issueing the bus reset */
150 LONG_RESET_FORCE_ROOT, SHORT_RESET_FORCE_ROOT,
152 /* Variants that clear force_root before issueing the bus reset */
153 LONG_RESET_NO_FORCE_ROOT, SHORT_RESET_NO_FORCE_ROOT
154 };
156 struct hpsb_host_driver {
157 struct module *owner;
158 const char *name;
160 /* The hardware driver may optionally support a function that is used
161 * to set the hardware ConfigROM if the hardware supports handling
162 * reads to the ConfigROM on its own. */
163 void (*set_hw_config_rom) (struct hpsb_host *host, quadlet_t *config_rom);
165 /* This function shall implement packet transmission based on
166 * packet->type. It shall CRC both parts of the packet (unless
167 * packet->type == raw) and do byte-swapping as necessary or instruct
168 * the hardware to do so. It can return immediately after the packet
169 * was queued for sending. After sending, hpsb_sent_packet() has to be
170 * called. Return 0 on success, negative errno on failure.
171 * NOTE: The function must be callable in interrupt context.
172 */
173 int (*transmit_packet) (struct hpsb_host *host,
174 struct hpsb_packet *packet);
176 /* This function requests miscellanous services from the driver, see
177 * above for command codes and expected actions. Return -1 for unknown
178 * command, though that should never happen.
179 */
180 int (*devctl) (struct hpsb_host *host, enum devctl_cmd command, int arg);
182 /* ISO transmission/reception functions. Return 0 on success, -1
183 * (or -EXXX errno code) on failure. If the low-level driver does not
184 * support the new ISO API, set isoctl to NULL.
185 */
186 int (*isoctl) (struct hpsb_iso *iso, enum isoctl_cmd command, unsigned long arg);
188 /* This function is mainly to redirect local CSR reads/locks to the iso
189 * management registers (bus manager id, bandwidth available, channels
190 * available) to the hardware registers in OHCI. reg is 0,1,2,3 for bus
191 * mgr, bwdth avail, ch avail hi, ch avail lo respectively (the same ids
192 * as OHCI uses). data and compare are the new data and expected data
193 * respectively, return value is the old value.
194 */
195 quadlet_t (*hw_csr_reg) (struct hpsb_host *host, int reg,
196 quadlet_t data, quadlet_t compare);
197 };
200 struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra,
201 struct device *dev);
202 int hpsb_add_host(struct hpsb_host *host);
203 void hpsb_remove_host(struct hpsb_host *h);
205 /* The following 2 functions are deprecated and will be removed when the
206 * raw1394/libraw1394 update is complete. */
207 int hpsb_update_config_rom(struct hpsb_host *host,
208 const quadlet_t *new_rom, size_t size, unsigned char rom_version);
209 int hpsb_get_config_rom(struct hpsb_host *host, quadlet_t *buffer,
210 size_t buffersize, size_t *rom_size, unsigned char *rom_version);
212 /* Updates the configuration rom image of a host. rom_version must be the
213 * current version, otherwise it will fail with return value -1. If this
214 * host does not support config-rom-update, it will return -EINVAL.
215 * Return value 0 indicates success.
216 */
217 int hpsb_update_config_rom_image(struct hpsb_host *host);
219 #endif /* _IEEE1394_HOSTS_H */