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[SCSI] storvsc: Update the storage protocol to win8 level

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Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
tirimbino
K. Y. Srinivasan 12 years ago committed by James Bottomley
parent 893def3821
commit 8b612fa23f
1 changed files with 168 additions and 35 deletions
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  1. 203
      drivers/scsi/storvsc_drv.c

203
drivers/scsi/storvsc_drv.c
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@ -55,10 +55,15 @@
* V1 RC < 2008/1/31: 1.0
* V1 RC > 2008/1/31: 2.0
* Win7: 4.2
* Win8: 5.1
*/
#define VMSTOR_CURRENT_MAJOR 4
#define VMSTOR_CURRENT_MINOR 2
#define VMSTOR_WIN7_MAJOR 4
#define VMSTOR_WIN7_MINOR 2
#define VMSTOR_WIN8_MAJOR 5
#define VMSTOR_WIN8_MINOR 1
/* Packet structure describing virtual storage requests. */
@ -74,18 +79,103 @@ enum vstor_packet_operation {
VSTOR_OPERATION_QUERY_PROTOCOL_VERSION = 9,
VSTOR_OPERATION_QUERY_PROPERTIES = 10,
VSTOR_OPERATION_ENUMERATE_BUS = 11,
VSTOR_OPERATION_MAXIMUM = 11
VSTOR_OPERATION_FCHBA_DATA = 12,
VSTOR_OPERATION_CREATE_SUB_CHANNELS = 13,
VSTOR_OPERATION_MAXIMUM = 13
};
/*
* WWN packet for Fibre Channel HBA
*/
struct hv_fc_wwn_packet {
bool primary_active;
u8 reserved1;
u8 reserved2;
u8 primary_port_wwn[8];
u8 primary_node_wwn[8];
u8 secondary_port_wwn[8];
u8 secondary_node_wwn[8];
};
/*
* SRB Flag Bits
*/
#define SRB_FLAGS_QUEUE_ACTION_ENABLE 0x00000002
#define SRB_FLAGS_DISABLE_DISCONNECT 0x00000004
#define SRB_FLAGS_DISABLE_SYNCH_TRANSFER 0x00000008
#define SRB_FLAGS_BYPASS_FROZEN_QUEUE 0x00000010
#define SRB_FLAGS_DISABLE_AUTOSENSE 0x00000020
#define SRB_FLAGS_DATA_IN 0x00000040
#define SRB_FLAGS_DATA_OUT 0x00000080
#define SRB_FLAGS_NO_DATA_TRANSFER 0x00000000
#define SRB_FLAGS_UNSPECIFIED_DIRECTION (SRB_FLAGS_DATA_IN | SRB_FLAGS_DATA_OUT)
#define SRB_FLAGS_NO_QUEUE_FREEZE 0x00000100
#define SRB_FLAGS_ADAPTER_CACHE_ENABLE 0x00000200
#define SRB_FLAGS_FREE_SENSE_BUFFER 0x00000400
/*
* This flag indicates the request is part of the workflow for processing a D3.
*/
#define SRB_FLAGS_D3_PROCESSING 0x00000800
#define SRB_FLAGS_IS_ACTIVE 0x00010000
#define SRB_FLAGS_ALLOCATED_FROM_ZONE 0x00020000
#define SRB_FLAGS_SGLIST_FROM_POOL 0x00040000
#define SRB_FLAGS_BYPASS_LOCKED_QUEUE 0x00080000
#define SRB_FLAGS_NO_KEEP_AWAKE 0x00100000
#define SRB_FLAGS_PORT_DRIVER_ALLOCSENSE 0x00200000
#define SRB_FLAGS_PORT_DRIVER_SENSEHASPORT 0x00400000
#define SRB_FLAGS_DONT_START_NEXT_PACKET 0x00800000
#define SRB_FLAGS_PORT_DRIVER_RESERVED 0x0F000000
#define SRB_FLAGS_CLASS_DRIVER_RESERVED 0xF0000000
/*
* Platform neutral description of a scsi request -
* this remains the same across the write regardless of 32/64 bit
* note: it's patterned off the SCSI_PASS_THROUGH structure
*/
#define STORVSC_MAX_CMD_LEN 0x10
#define STORVSC_SENSE_BUFFER_SIZE 0x12
#define POST_WIN7_STORVSC_SENSE_BUFFER_SIZE 0x14
#define PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE 0x12
#define STORVSC_SENSE_BUFFER_SIZE 0x14
#define STORVSC_MAX_BUF_LEN_WITH_PADDING 0x14
/*
* Sense buffer size changed in win8; have a run-time
* variable to track the size we should use.
*/
static int sense_buffer_size;
/*
* The size of the vmscsi_request has changed in win8. The
* additional size is because of new elements added to the
* structure. These elements are valid only when we are talking
* to a win8 host.
* Track the correction to size we need to apply.
*/
static int vmscsi_size_delta;
static int vmstor_current_major;
static int vmstor_current_minor;
struct vmscsi_win8_extension {
/*
* The following were added in Windows 8
*/
u16 reserve;
u8 queue_tag;
u8 queue_action;
u32 srb_flags;
u32 time_out_value;
u32 queue_sort_ey;
} __packed;
struct vmscsi_request {
u16 length;
u8 srb_status;
@ -108,6 +198,11 @@ struct vmscsi_request {
u8 sense_data[STORVSC_SENSE_BUFFER_SIZE];
u8 reserved_array[STORVSC_MAX_BUF_LEN_WITH_PADDING];
};
/*
* The following was added in win8.
*/
struct vmscsi_win8_extension win8_extension;
} __attribute((packed));
@ -115,22 +210,18 @@ struct vmscsi_request {
* This structure is sent during the intialization phase to get the different
* properties of the channel.
*/
#define STORAGE_CHANNEL_SUPPORTS_MULTI_CHANNEL 0x1
struct vmstorage_channel_properties {
u16 protocol_version;
u8 path_id;
u8 target_id;
u32 reserved;
u16 max_channel_cnt;
u16 reserved1;
/* Note: port number is only really known on the client side */
u32 port_number;
u32 flags;
u32 flags;
u32 max_transfer_bytes;
/*
* This id is unique for each channel and will correspond with
* vendor specific data in the inquiry data.
*/
u64 unique_id;
u64 reserved2;
} __packed;
/* This structure is sent during the storage protocol negotiations. */
@ -175,6 +266,15 @@ struct vstor_packet {
/* Used during version negotiations. */
struct vmstorage_protocol_version version;
/* Fibre channel address packet */
struct hv_fc_wwn_packet wwn_packet;
/* Number of sub-channels to create */
u16 sub_channel_count;
/* This will be the maximum of the union members */
u8 buffer[0x34];
};
} __packed;
@ -679,7 +779,8 @@ static int storvsc_channel_init(struct hv_device *device)
vstor_packet->flags = REQUEST_COMPLETION_FLAG;
ret = vmbus_sendpacket(device->channel, vstor_packet,
sizeof(struct vstor_packet),
(sizeof(struct vstor_packet) -
vmscsi_size_delta),
(unsigned long)request,
VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
@ -703,7 +804,7 @@ static int storvsc_channel_init(struct hv_device *device)
vstor_packet->flags = REQUEST_COMPLETION_FLAG;
vstor_packet->version.major_minor =
storvsc_get_version(VMSTOR_CURRENT_MAJOR, VMSTOR_CURRENT_MINOR);
storvsc_get_version(vmstor_current_major, vmstor_current_minor);
/*
* The revision number is only used in Windows; set it to 0.
@ -711,7 +812,8 @@ static int storvsc_channel_init(struct hv_device *device)
vstor_packet->version.revision = 0;
ret = vmbus_sendpacket(device->channel, vstor_packet,
sizeof(struct vstor_packet),
(sizeof(struct vstor_packet) -
vmscsi_size_delta),
(unsigned long)request,
VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
@ -732,11 +834,10 @@ static int storvsc_channel_init(struct hv_device *device)
memset(vstor_packet, 0, sizeof(struct vstor_packet));
vstor_packet->operation = VSTOR_OPERATION_QUERY_PROPERTIES;
vstor_packet->flags = REQUEST_COMPLETION_FLAG;
vstor_packet->storage_channel_properties.port_number =
stor_device->port_number;
ret = vmbus_sendpacket(device->channel, vstor_packet,
sizeof(struct vstor_packet),
(sizeof(struct vstor_packet) -
vmscsi_size_delta),
(unsigned long)request,
VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
@ -754,16 +855,13 @@ static int storvsc_channel_init(struct hv_device *device)
vstor_packet->status != 0)
goto cleanup;
stor_device->path_id = vstor_packet->storage_channel_properties.path_id;
stor_device->target_id
= vstor_packet->storage_channel_properties.target_id;
memset(vstor_packet, 0, sizeof(struct vstor_packet));
vstor_packet->operation = VSTOR_OPERATION_END_INITIALIZATION;
vstor_packet->flags = REQUEST_COMPLETION_FLAG;
ret = vmbus_sendpacket(device->channel, vstor_packet,
sizeof(struct vstor_packet),
(sizeof(struct vstor_packet) -
vmscsi_size_delta),
(unsigned long)request,
VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
@ -1017,7 +1115,8 @@ static void storvsc_on_channel_callback(void *context)
do {
ret = vmbus_recvpacket(device->channel, packet,
ALIGN(sizeof(struct vstor_packet), 8),
ALIGN((sizeof(struct vstor_packet) -
vmscsi_size_delta), 8),
&bytes_recvd, &request_id);
if (ret == 0 && bytes_recvd > 0) {
@ -1028,7 +1127,8 @@ static void storvsc_on_channel_callback(void *context)
(request == &stor_device->reset_request)) {
memcpy(&request->vstor_packet, packet,
sizeof(struct vstor_packet));
(sizeof(struct vstor_packet) -
vmscsi_size_delta));
complete(&request->wait_event);
} else {
storvsc_on_receive(device,
@ -1121,10 +1221,11 @@ static int storvsc_do_io(struct hv_device *device,
vstor_packet->flags |= REQUEST_COMPLETION_FLAG;
vstor_packet->vm_srb.length = sizeof(struct vmscsi_request);
vstor_packet->vm_srb.length = (sizeof(struct vmscsi_request) -
vmscsi_size_delta);
vstor_packet->vm_srb.sense_info_length = STORVSC_SENSE_BUFFER_SIZE;
vstor_packet->vm_srb.sense_info_length = sense_buffer_size;
vstor_packet->vm_srb.data_transfer_length =
@ -1136,11 +1237,13 @@ static int storvsc_do_io(struct hv_device *device,
ret = vmbus_sendpacket_multipagebuffer(device->channel,
&request->data_buffer,
vstor_packet,
sizeof(struct vstor_packet),
(sizeof(struct vstor_packet) -
vmscsi_size_delta),
(unsigned long)request);
} else {
ret = vmbus_sendpacket(device->channel, vstor_packet,
sizeof(struct vstor_packet),
(sizeof(struct vstor_packet) -
vmscsi_size_delta),
(unsigned long)request,
VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
@ -1264,7 +1367,8 @@ static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd)
vstor_packet->vm_srb.path_id = stor_device->path_id;
ret = vmbus_sendpacket(device->channel, vstor_packet,
sizeof(struct vstor_packet),
(sizeof(struct vstor_packet) -
vmscsi_size_delta),
(unsigned long)&stor_device->reset_request,
VM_PKT_DATA_INBAND,
VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
@ -1349,18 +1453,28 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
scmnd->host_scribble = (unsigned char *)cmd_request;
vm_srb = &cmd_request->vstor_packet.vm_srb;
vm_srb->win8_extension.time_out_value = 60;
/* Build the SRB */
switch (scmnd->sc_data_direction) {
case DMA_TO_DEVICE:
vm_srb->data_in = WRITE_TYPE;
vm_srb->win8_extension.srb_flags |= SRB_FLAGS_DATA_OUT;
vm_srb->win8_extension.srb_flags |=
(SRB_FLAGS_QUEUE_ACTION_ENABLE |
SRB_FLAGS_DISABLE_SYNCH_TRANSFER);
break;
case DMA_FROM_DEVICE:
vm_srb->data_in = READ_TYPE;
vm_srb->win8_extension.srb_flags |= SRB_FLAGS_DATA_IN;
vm_srb->win8_extension.srb_flags |=
(SRB_FLAGS_QUEUE_ACTION_ENABLE |
SRB_FLAGS_DISABLE_SYNCH_TRANSFER);
break;
default:
vm_srb->data_in = UNKNOWN_TYPE;
vm_srb->win8_extension.srb_flags = 0;
break;
}
@ -1492,6 +1606,24 @@ static int storvsc_probe(struct hv_device *device,
int target = 0;
struct storvsc_device *stor_device;
/*
* Based on the windows host we are running on,
* set state to properly communicate with the host.
*/
if (vmbus_proto_version == VERSION_WIN8) {
sense_buffer_size = POST_WIN7_STORVSC_SENSE_BUFFER_SIZE;
vmscsi_size_delta = 0;
vmstor_current_major = VMSTOR_WIN8_MAJOR;
vmstor_current_minor = VMSTOR_WIN8_MINOR;
} else {
sense_buffer_size = PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE;
vmscsi_size_delta = sizeof(struct vmscsi_win8_extension);
vmstor_current_major = VMSTOR_WIN7_MAJOR;
vmstor_current_minor = VMSTOR_WIN7_MINOR;
}
host = scsi_host_alloc(&scsi_driver,
sizeof(struct hv_host_device));
if (!host)
@ -1601,7 +1733,8 @@ static int __init storvsc_drv_init(void)
max_outstanding_req_per_channel =
((storvsc_ringbuffer_size - PAGE_SIZE) /
ALIGN(MAX_MULTIPAGE_BUFFER_PACKET +
sizeof(struct vstor_packet) + sizeof(u64),
sizeof(struct vstor_packet) + sizeof(u64) -
vmscsi_size_delta,
sizeof(u64)));
if (max_outstanding_req_per_channel <

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