Release 4.11 drivers/staging/unisys/include/channel.h
/* Copyright (C) 2010 - 2013 UNISYS CORPORATION
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*/
#ifndef __CHANNEL_H__
#define __CHANNEL_H__
#include <linux/types.h>
#include <linux/io.h>
#include <linux/uuid.h>
/*
* Whenever this file is changed a corresponding change must be made in
* the Console/ServicePart/visordiag_early/supervisor_channel.h file
* which is needed for Linux kernel compiles. These two files must be
* in sync.
*/
/* define the following to prevent include nesting in kernel header
* files of similar abbreviated content
*/
#define __SUPERVISOR_CHANNEL_H__
#define SIGNATURE_16(A, B) ((A) | (B << 8))
#define SIGNATURE_32(A, B, C, D) \
(SIGNATURE_16(A, B) | (SIGNATURE_16(C, D) << 16))
#define SIGNATURE_64(A, B, C, D, E, F, G, H) \
(SIGNATURE_32(A, B, C, D) | ((u64)(SIGNATURE_32(E, F, G, H)) << 32))
#ifndef lengthof
#define lengthof(TYPE, MEMBER) (sizeof(((TYPE *)0)->MEMBER))
#endif
#ifndef COVERQ
#define COVERQ(v, d) (((v) + (d) - 1) / (d))
#endif
#ifndef COVER
#define COVER(v, d) ((d) * COVERQ(v, d))
#endif
#define ULTRA_CHANNEL_PROTOCOL_SIGNATURE SIGNATURE_32('E', 'C', 'N', 'L')
enum channel_serverstate {
CHANNELSRV_UNINITIALIZED = 0, /* channel is in an undefined state */
CHANNELSRV_READY = 1 /* channel has been initialized by server */
};
enum channel_clientstate {
CHANNELCLI_DETACHED = 0,
CHANNELCLI_DISABLED = 1, /* client can see channel but is NOT
* allowed to use it unless given TBD
* explicit request (should actually be
* < DETACHED)
*/
CHANNELCLI_ATTACHING = 2, /* legacy EFI client request
* for EFI server to attach
*/
CHANNELCLI_ATTACHED = 3, /* idle, but client may want
* to use channel any time
*/
CHANNELCLI_BUSY = 4, /* client either wants to use or is
* using channel
*/
CHANNELCLI_OWNED = 5 /* "no worries" state - client can */
/* access channel anytime */
};
#define SPAR_CHANNEL_SERVER_READY(ch) \
(readl(&(ch)->srv_state) == CHANNELSRV_READY)
#define ULTRA_VALID_CHANNELCLI_TRANSITION(o, n) \
(((((o) == CHANNELCLI_DETACHED) && ((n) == CHANNELCLI_DISABLED)) || \
(((o) == CHANNELCLI_ATTACHING) && ((n) == CHANNELCLI_DISABLED)) || \
(((o) == CHANNELCLI_ATTACHED) && ((n) == CHANNELCLI_DISABLED)) || \
(((o) == CHANNELCLI_ATTACHING) && ((n) == CHANNELCLI_DETACHED)) || \
(((o) == CHANNELCLI_ATTACHED) && ((n) == CHANNELCLI_DETACHED)) || \
(((o) == CHANNELCLI_DETACHED) && ((n) == CHANNELCLI_ATTACHING)) || \
(((o) == CHANNELCLI_ATTACHING) && ((n) == CHANNELCLI_ATTACHED)) || \
(((o) == CHANNELCLI_DETACHED) && ((n) == CHANNELCLI_ATTACHED)) || \
(((o) == CHANNELCLI_BUSY) && ((n) == CHANNELCLI_ATTACHED)) || \
(((o) == CHANNELCLI_ATTACHED) && ((n) == CHANNELCLI_BUSY)) || \
(((o) == CHANNELCLI_DETACHED) && ((n) == CHANNELCLI_OWNED)) || \
(((o) == CHANNELCLI_DISABLED) && ((n) == CHANNELCLI_OWNED)) || \
(((o) == CHANNELCLI_ATTACHING) && ((n) == CHANNELCLI_OWNED)) || \
(((o) == CHANNELCLI_ATTACHED) && ((n) == CHANNELCLI_OWNED)) || \
(((o) == CHANNELCLI_BUSY) && ((n) == CHANNELCLI_OWNED)) || (0)) \
? (1) : (0))
/* Values for ULTRA_CHANNEL_PROTOCOL.CliErrorBoot: */
/* throttling invalid boot channel statetransition error due to client
* disabled
*/
#define ULTRA_CLIERRORBOOT_THROTTLEMSG_DISABLED 0x01
/* throttling invalid boot channel statetransition error due to client
* not attached
*/
#define ULTRA_CLIERRORBOOT_THROTTLEMSG_NOTATTACHED 0x02
/* throttling invalid boot channel statetransition error due to busy channel */
#define ULTRA_CLIERRORBOOT_THROTTLEMSG_BUSY 0x04
/* Values for ULTRA_CHANNEL_PROTOCOL.Features: This define exists so
* that windows guest can look at the FeatureFlags in the io channel,
* and configure the windows driver to use interrupts or not based on
* this setting. This flag is set in uislib after the
* ULTRA_VHBA_init_channel is called. All feature bits for all
* channels should be defined here. The io channel feature bits are
* defined right here
*/
#define ULTRA_IO_DRIVER_ENABLES_INTS (0x1ULL << 1)
#define ULTRA_IO_CHANNEL_IS_POLLING (0x1ULL << 3)
#define ULTRA_IO_IOVM_IS_OK_WITH_DRIVER_DISABLING_INTS (0x1ULL << 4)
#define ULTRA_IO_DRIVER_DISABLES_INTS (0x1ULL << 5)
#define ULTRA_IO_DRIVER_SUPPORTS_ENHANCED_RCVBUF_CHECKING (0x1ULL << 6)
/* Common Channel Header */
struct channel_header {
u64 signature; /* Signature */
u32 legacy_state; /* DEPRECATED - being replaced by */
/* SrvState, CliStateBoot, and CliStateOS below */
u32 header_size; /* sizeof(struct channel_header) */
u64 size; /* Total size of this channel in bytes */
u64 features; /* Flags to modify behavior */
uuid_le chtype; /* Channel type: data, bus, control, etc. */
u64 partition_handle; /* ID of guest partition */
u64 handle; /* Device number of this channel in client */
u64 ch_space_offset; /* Offset in bytes to channel specific area */
u32 version_id; /* struct channel_header Version ID */
u32 partition_index; /* Index of guest partition */
uuid_le zone_uuid; /* Guid of Channel's zone */
u32 cli_str_offset; /* offset from channel header to
* nul-terminated ClientString (0 if
* ClientString not present)
*/
u32 cli_state_boot; /* CHANNEL_CLIENTSTATE of pre-boot
* EFI client of this channel
*/
u32 cmd_state_cli; /* CHANNEL_COMMANDSTATE (overloaded in
* Windows drivers, see ServerStateUp,
* ServerStateDown, etc)
*/
u32 cli_state_os; /* CHANNEL_CLIENTSTATE of Guest OS
* client of this channel
*/
u32 ch_characteristic; /* CHANNEL_CHARACTERISTIC_<xxx> */
u32 cmd_state_srv; /* CHANNEL_COMMANDSTATE (overloaded in
* Windows drivers, see ServerStateUp,
* ServerStateDown, etc)
*/
u32 srv_state; /* CHANNEL_SERVERSTATE */
u8 cli_error_boot; /* bits to indicate err states for
* boot clients, so err messages can
* be throttled
*/
u8 cli_error_os; /* bits to indicate err states for OS
* clients, so err messages can be
* throttled
*/
u8 filler[1]; /* Pad out to 128 byte cacheline */
/* Please add all new single-byte values below here */
u8 recover_channel;
}
__packed;
#define ULTRA_CHANNEL_ENABLE_INTS (0x1ULL << 0)
/* Subheader for the Signal Type variation of the Common Channel */
struct signal_queue_header {
/* 1st cache line */
u32 version; /* SIGNAL_QUEUE_HEADER Version ID */
u32 chtype; /* Queue type: storage, network */
u64 size; /* Total size of this queue in bytes */
u64 sig_base_offset; /* Offset to signal queue area */
u64 features; /* Flags to modify behavior */
u64 num_sent; /* Total # of signals placed in this queue */
u64 num_overflows; /* Total # of inserts failed due to
* full queue
*/
u32 signal_size; /* Total size of a signal for this queue */
u32 max_slots; /* Max # of slots in queue, 1 slot is
* always empty
*/
u32 max_signals; /* Max # of signals in queue
* (MaxSignalSlots-1)
*/
u32 head; /* Queue head signal # */
/* 2nd cache line */
u64 num_received; /* Total # of signals removed from this queue */
u32 tail; /* Queue tail signal */
u32 reserved1; /* Reserved field */
u64 reserved2; /* Reserved field */
u64 client_queue;
u64 num_irq_received; /* Total # of Interrupts received. This
* is incremented by the ISR in the
* guest windows driver
*/
u64 num_empty; /* Number of times that visor_signal_remove
* is called and returned Empty Status.
*/
u32 errorflags; /* Error bits set during SignalReinit
* to denote trouble with client's
* fields
*/
u8 filler[12]; /* Pad out to 64 byte cacheline */
}
__packed;
#define spar_signal_init(chan, QHDRFLD, QDATAFLD, QDATATYPE, ver, typ) \
do { \
memset(&chan->QHDRFLD, 0, sizeof(chan->QHDRFLD)); \
chan->QHDRFLD.version = ver; \
chan->QHDRFLD.chtype = typ; \
chan->QHDRFLD.size = sizeof(chan->QDATAFLD); \
chan->QHDRFLD.signal_size = sizeof(QDATATYPE); \
chan->QHDRFLD.sig_base_offset = (u64)(chan->QDATAFLD) - \
(u64)(&chan->QHDRFLD); \
chan->QHDRFLD.max_slots = \
sizeof(chan->QDATAFLD) / sizeof(QDATATYPE); \
chan->QHDRFLD.max_signals = chan->QHDRFLD.max_slots - 1;\
} while (0)
/* Generic function useful for validating any type of channel when it is
* received by the client that will be accessing the channel.
* Note that <logCtx> is only needed for callers in the EFI environment, and
* is used to pass the EFI_DIAG_CAPTURE_PROTOCOL needed to log messages.
*/
static inline int
spar_check_channel_client(void __iomem *ch,
uuid_le expected_uuid,
char *chname,
u64 expected_min_bytes,
u32 expected_version,
u64 expected_signature)
{
if (uuid_le_cmp(expected_uuid, NULL_UUID_LE) != 0) {
uuid_le guid;
memcpy_fromio(&guid,
&((struct channel_header __iomem *)(ch))->chtype,
sizeof(guid));
/* caller wants us to verify type GUID */
if (uuid_le_cmp(guid, expected_uuid) != 0) {
pr_err("Channel mismatch on channel=%s(%pUL) field=type expected=%pUL actual=%pUL\n",
chname, &expected_uuid,
&expected_uuid, &guid);
return 0;
}
}
if (expected_min_bytes > 0) { /* verify channel size */
unsigned long long bytes =
readq(&((struct channel_header __iomem *)
(ch))->size);
if (bytes < expected_min_bytes) {
pr_err("Channel mismatch on channel=%s(%pUL) field=size expected=0x%-8.8Lx actual=0x%-8.8Lx\n",
chname, &expected_uuid,
(unsigned long long)expected_min_bytes, bytes);
return 0;
}
}
if (expected_version > 0) { /* verify channel version */
unsigned long ver = readl(&((struct channel_header __iomem *)
(ch))->version_id);
if (ver != expected_version) {
pr_err("Channel mismatch on channel=%s(%pUL) field=version expected=0x%-8.8lx actual=0x%-8.8lx\n",
chname, &expected_uuid,
(unsigned long)expected_version, ver);
return 0;
}
}
if (expected_signature > 0) { /* verify channel signature */
unsigned long long sig =
readq(&((struct channel_header __iomem *)
(ch))->signature);
if (sig != expected_signature) {
pr_err("Channel mismatch on channel=%s(%pUL) field=signature expected=0x%-8.8llx actual=0x%-8.8llx\n",
chname, &expected_uuid,
expected_signature, sig);
return 0;
}
}
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ken Cox | 156 | 54.74% | 3 | 23.08% |
| Benjamin Romer | 107 | 37.54% | 8 | 61.54% |
| Luke Hart | 19 | 6.67% | 1 | 7.69% |
| Erik Arfvidson | 3 | 1.05% | 1 | 7.69% |
| Total | 285 | 100.00% | 13 | 100.00% |
/* Generic function useful for validating any type of channel when it is about
* to be initialized by the server of the channel.
* Note that <logCtx> is only needed for callers in the EFI environment, and
* is used to pass the EFI_DIAG_CAPTURE_PROTOCOL needed to log messages.
*/
static inline int spar_check_channel_server(uuid_le typeuuid, char *name,
u64 expected_min_bytes,
u64 actual_bytes)
{
if (expected_min_bytes > 0) /* verify channel size */
if (actual_bytes < expected_min_bytes) {
pr_err("Channel mismatch on channel=%s(%pUL) field=size expected=0x%-8.8llx actual=0x%-8.8llx\n",
name, &typeuuid, expected_min_bytes,
actual_bytes);
return 0;
}
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Benjamin Romer | 54 | 98.18% | 1 | 50.00% |
| Erik Arfvidson | 1 | 1.82% | 1 | 50.00% |
| Total | 55 | 100.00% | 2 | 100.00% |
/*
* Routine Description:
* Tries to insert the prebuilt signal pointed to by pSignal into the nth
* Queue of the Channel pointed to by pChannel
*
* Parameters:
* pChannel: (IN) points to the IO Channel
* Queue: (IN) nth Queue of the IO Channel
* pSignal: (IN) pointer to the signal
*
* Assumptions:
* - pChannel, Queue and pSignal are valid.
* - If insertion fails due to a full queue, the caller will determine the
* retry policy (e.g. wait & try again, report an error, etc.).
*
* Return value: 1 if the insertion succeeds, 0 if the queue was
* full.
*/
unsigned char spar_signal_insert(struct channel_header __iomem *ch, u32 queue,
void *sig);
/*
* Routine Description:
* Removes one signal from Channel pChannel's nth Queue at the
* time of the call and copies it into the memory pointed to by
* pSignal.
*
* Parameters:
* pChannel: (IN) points to the IO Channel
* Queue: (IN) nth Queue of the IO Channel
* pSignal: (IN) pointer to where the signals are to be copied
*
* Assumptions:
* - pChannel and Queue are valid.
* - pSignal points to a memory area large enough to hold queue's SignalSize
*
* Return value: 1 if the removal succeeds, 0 if the queue was
* empty.
*/
unsigned char spar_signal_remove(struct channel_header __iomem *ch, u32 queue,
void *sig);
/*
* Routine Description:
* Removes all signals present in Channel pChannel's nth Queue at the
* time of the call and copies them into the memory pointed to by
* pSignal. Returns the # of signals copied as the value of the routine.
*
* Parameters:
* pChannel: (IN) points to the IO Channel
* Queue: (IN) nth Queue of the IO Channel
* pSignal: (IN) pointer to where the signals are to be copied
*
* Assumptions:
* - pChannel and Queue are valid.
* - pSignal points to a memory area large enough to hold Queue's MaxSignals
* # of signals, each of which is Queue's SignalSize.
*
* Return value:
* # of signals copied.
*/
unsigned int spar_signal_remove_all(struct channel_header *ch, u32 queue,
void *sig);
/*
* Routine Description:
* Determine whether a signal queue is empty.
*
* Parameters:
* pChannel: (IN) points to the IO Channel
* Queue: (IN) nth Queue of the IO Channel
*
* Return value:
* 1 if the signal queue is empty, 0 otherwise.
*/
unsigned char spar_signalqueue_empty(struct channel_header __iomem *ch,
u32 queue);
/*
* CHANNEL Guids
*/
/* {414815ed-c58c-11da-95a9-00e08161165f} */
#define SPAR_VHBA_CHANNEL_PROTOCOL_UUID \
UUID_LE(0x414815ed, 0xc58c, 0x11da, \
0x95, 0xa9, 0x0, 0xe0, 0x81, 0x61, 0x16, 0x5f)
static const uuid_le spar_vhba_channel_protocol_uuid =
SPAR_VHBA_CHANNEL_PROTOCOL_UUID;
#define SPAR_VHBA_CHANNEL_PROTOCOL_UUID_STR \
"414815ed-c58c-11da-95a9-00e08161165f"
/* {8cd5994d-c58e-11da-95a9-00e08161165f} */
#define SPAR_VNIC_CHANNEL_PROTOCOL_UUID \
UUID_LE(0x8cd5994d, 0xc58e, 0x11da, \
0x95, 0xa9, 0x0, 0xe0, 0x81, 0x61, 0x16, 0x5f)
static const uuid_le spar_vnic_channel_protocol_uuid =
SPAR_VNIC_CHANNEL_PROTOCOL_UUID;
#define SPAR_VNIC_CHANNEL_PROTOCOL_UUID_STR \
"8cd5994d-c58e-11da-95a9-00e08161165f"
/* {72120008-4AAB-11DC-8530-444553544200} */
#define SPAR_SIOVM_UUID \
UUID_LE(0x72120008, 0x4AAB, 0x11DC, \
0x85, 0x30, 0x44, 0x45, 0x53, 0x54, 0x42, 0x00)
static const uuid_le spar_siovm_uuid = SPAR_SIOVM_UUID;
/* {5b52c5ac-e5f5-4d42-8dff-429eaecd221f} */
#define SPAR_CONTROLDIRECTOR_CHANNEL_PROTOCOL_UUID \
UUID_LE(0x5b52c5ac, 0xe5f5, 0x4d42, \
0x8d, 0xff, 0x42, 0x9e, 0xae, 0xcd, 0x22, 0x1f)
static const uuid_le spar_controldirector_channel_protocol_uuid =
SPAR_CONTROLDIRECTOR_CHANNEL_PROTOCOL_UUID;
/* {b4e79625-aede-4eAA-9e11-D3eddcd4504c} */
#define SPAR_DIAG_POOL_CHANNEL_PROTOCOL_UUID \
UUID_LE(0xb4e79625, 0xaede, 0x4eaa, \
0x9e, 0x11, 0xd3, 0xed, 0xdc, 0xd4, 0x50, 0x4c)
#endif
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Ken Cox | 485 | 53.01% | 3 | 9.68% |
| Benjamin Romer | 302 | 33.01% | 21 | 67.74% |
| David Binder | 69 | 7.54% | 1 | 3.23% |
| Erik Arfvidson | 28 | 3.06% | 1 | 3.23% |
| Luke Hart | 19 | 2.08% | 1 | 3.23% |
| David Kershner | 6 | 0.66% | 2 | 6.45% |
| Abdul Rauf | 5 | 0.55% | 1 | 3.23% |
| Masanari Iida | 1 | 0.11% | 1 | 3.23% |
| Total | 915 | 100.00% | 31 | 100.00% |
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