forked from Minki/linux
[SCSI] storvsc: Update the storage protocol to win8 level
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
K. Y. Srinivasan
James Bottomley
parent
893def3821
commit
8b612fa23f
@ -55,10 +55,15 @@
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* V1 RC < 2008/1/31: 1.0
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* V1 RC > 2008/1/31: 2.0
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* Win7: 4.2
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* Win8: 5.1
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*/
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#define VMSTOR_CURRENT_MAJOR 4
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#define VMSTOR_CURRENT_MINOR 2
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#define VMSTOR_WIN7_MAJOR 4
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#define VMSTOR_WIN7_MINOR 2
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#define VMSTOR_WIN8_MAJOR 5
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#define VMSTOR_WIN8_MINOR 1
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/* Packet structure describing virtual storage requests. */
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@ -74,18 +79,103 @@ enum vstor_packet_operation {
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VSTOR_OPERATION_QUERY_PROTOCOL_VERSION = 9,
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VSTOR_OPERATION_QUERY_PROPERTIES = 10,
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VSTOR_OPERATION_ENUMERATE_BUS = 11,
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VSTOR_OPERATION_MAXIMUM = 11
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VSTOR_OPERATION_FCHBA_DATA = 12,
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VSTOR_OPERATION_CREATE_SUB_CHANNELS = 13,
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VSTOR_OPERATION_MAXIMUM = 13
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};
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/*
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* WWN packet for Fibre Channel HBA
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*/
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struct hv_fc_wwn_packet {
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bool primary_active;
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u8 reserved1;
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u8 reserved2;
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u8 primary_port_wwn[8];
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u8 primary_node_wwn[8];
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u8 secondary_port_wwn[8];
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u8 secondary_node_wwn[8];
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};
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/*
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* SRB Flag Bits
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*/
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#define SRB_FLAGS_QUEUE_ACTION_ENABLE 0x00000002
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#define SRB_FLAGS_DISABLE_DISCONNECT 0x00000004
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#define SRB_FLAGS_DISABLE_SYNCH_TRANSFER 0x00000008
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#define SRB_FLAGS_BYPASS_FROZEN_QUEUE 0x00000010
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#define SRB_FLAGS_DISABLE_AUTOSENSE 0x00000020
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#define SRB_FLAGS_DATA_IN 0x00000040
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#define SRB_FLAGS_DATA_OUT 0x00000080
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#define SRB_FLAGS_NO_DATA_TRANSFER 0x00000000
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#define SRB_FLAGS_UNSPECIFIED_DIRECTION (SRB_FLAGS_DATA_IN | SRB_FLAGS_DATA_OUT)
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#define SRB_FLAGS_NO_QUEUE_FREEZE 0x00000100
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#define SRB_FLAGS_ADAPTER_CACHE_ENABLE 0x00000200
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#define SRB_FLAGS_FREE_SENSE_BUFFER 0x00000400
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/*
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* This flag indicates the request is part of the workflow for processing a D3.
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*/
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#define SRB_FLAGS_D3_PROCESSING 0x00000800
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#define SRB_FLAGS_IS_ACTIVE 0x00010000
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#define SRB_FLAGS_ALLOCATED_FROM_ZONE 0x00020000
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#define SRB_FLAGS_SGLIST_FROM_POOL 0x00040000
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#define SRB_FLAGS_BYPASS_LOCKED_QUEUE 0x00080000
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#define SRB_FLAGS_NO_KEEP_AWAKE 0x00100000
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#define SRB_FLAGS_PORT_DRIVER_ALLOCSENSE 0x00200000
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#define SRB_FLAGS_PORT_DRIVER_SENSEHASPORT 0x00400000
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#define SRB_FLAGS_DONT_START_NEXT_PACKET 0x00800000
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#define SRB_FLAGS_PORT_DRIVER_RESERVED 0x0F000000
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#define SRB_FLAGS_CLASS_DRIVER_RESERVED 0xF0000000
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/*
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* Platform neutral description of a scsi request -
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* this remains the same across the write regardless of 32/64 bit
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* note: it's patterned off the SCSI_PASS_THROUGH structure
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*/
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#define STORVSC_MAX_CMD_LEN 0x10
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#define STORVSC_SENSE_BUFFER_SIZE 0x12
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#define POST_WIN7_STORVSC_SENSE_BUFFER_SIZE 0x14
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#define PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE 0x12
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#define STORVSC_SENSE_BUFFER_SIZE 0x14
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#define STORVSC_MAX_BUF_LEN_WITH_PADDING 0x14
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/*
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* Sense buffer size changed in win8; have a run-time
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* variable to track the size we should use.
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*/
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static int sense_buffer_size;
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/*
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* The size of the vmscsi_request has changed in win8. The
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* additional size is because of new elements added to the
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* structure. These elements are valid only when we are talking
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* to a win8 host.
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* Track the correction to size we need to apply.
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*/
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static int vmscsi_size_delta;
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static int vmstor_current_major;
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static int vmstor_current_minor;
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struct vmscsi_win8_extension {
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/*
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* The following were added in Windows 8
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*/
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u16 reserve;
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u8 queue_tag;
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u8 queue_action;
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u32 srb_flags;
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u32 time_out_value;
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u32 queue_sort_ey;
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} __packed;
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struct vmscsi_request {
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u16 length;
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u8 srb_status;
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@ -108,6 +198,11 @@ struct vmscsi_request {
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u8 sense_data[STORVSC_SENSE_BUFFER_SIZE];
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u8 reserved_array[STORVSC_MAX_BUF_LEN_WITH_PADDING];
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};
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/*
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* The following was added in win8.
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*/
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struct vmscsi_win8_extension win8_extension;
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} __attribute((packed));
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@ -115,22 +210,18 @@ struct vmscsi_request {
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* This structure is sent during the intialization phase to get the different
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* properties of the channel.
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*/
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struct vmstorage_channel_properties {
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u16 protocol_version;
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u8 path_id;
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u8 target_id;
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/* Note: port number is only really known on the client side */
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u32 port_number;
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u32 flags;
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#define STORAGE_CHANNEL_SUPPORTS_MULTI_CHANNEL 0x1
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struct vmstorage_channel_properties {
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u32 reserved;
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u16 max_channel_cnt;
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u16 reserved1;
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u32 flags;
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u32 max_transfer_bytes;
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/*
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* This id is unique for each channel and will correspond with
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* vendor specific data in the inquiry data.
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*/
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u64 unique_id;
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u64 reserved2;
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} __packed;
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/* This structure is sent during the storage protocol negotiations. */
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@ -175,6 +266,15 @@ struct vstor_packet {
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/* Used during version negotiations. */
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struct vmstorage_protocol_version version;
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/* Fibre channel address packet */
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struct hv_fc_wwn_packet wwn_packet;
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/* Number of sub-channels to create */
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u16 sub_channel_count;
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/* This will be the maximum of the union members */
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u8 buffer[0x34];
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};
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} __packed;
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@ -679,7 +779,8 @@ static int storvsc_channel_init(struct hv_device *device)
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vstor_packet->flags = REQUEST_COMPLETION_FLAG;
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ret = vmbus_sendpacket(device->channel, vstor_packet,
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sizeof(struct vstor_packet),
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(sizeof(struct vstor_packet) -
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vmscsi_size_delta),
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(unsigned long)request,
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VM_PKT_DATA_INBAND,
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
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@ -703,7 +804,7 @@ static int storvsc_channel_init(struct hv_device *device)
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vstor_packet->flags = REQUEST_COMPLETION_FLAG;
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vstor_packet->version.major_minor =
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storvsc_get_version(VMSTOR_CURRENT_MAJOR, VMSTOR_CURRENT_MINOR);
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storvsc_get_version(vmstor_current_major, vmstor_current_minor);
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/*
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* The revision number is only used in Windows; set it to 0.
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@ -711,7 +812,8 @@ static int storvsc_channel_init(struct hv_device *device)
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vstor_packet->version.revision = 0;
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ret = vmbus_sendpacket(device->channel, vstor_packet,
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sizeof(struct vstor_packet),
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(sizeof(struct vstor_packet) -
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vmscsi_size_delta),
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(unsigned long)request,
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VM_PKT_DATA_INBAND,
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
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@ -732,11 +834,10 @@ static int storvsc_channel_init(struct hv_device *device)
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memset(vstor_packet, 0, sizeof(struct vstor_packet));
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vstor_packet->operation = VSTOR_OPERATION_QUERY_PROPERTIES;
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vstor_packet->flags = REQUEST_COMPLETION_FLAG;
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vstor_packet->storage_channel_properties.port_number =
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stor_device->port_number;
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ret = vmbus_sendpacket(device->channel, vstor_packet,
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sizeof(struct vstor_packet),
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(sizeof(struct vstor_packet) -
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vmscsi_size_delta),
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(unsigned long)request,
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VM_PKT_DATA_INBAND,
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
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@ -754,16 +855,13 @@ static int storvsc_channel_init(struct hv_device *device)
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vstor_packet->status != 0)
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goto cleanup;
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stor_device->path_id = vstor_packet->storage_channel_properties.path_id;
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stor_device->target_id
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= vstor_packet->storage_channel_properties.target_id;
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memset(vstor_packet, 0, sizeof(struct vstor_packet));
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vstor_packet->operation = VSTOR_OPERATION_END_INITIALIZATION;
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vstor_packet->flags = REQUEST_COMPLETION_FLAG;
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ret = vmbus_sendpacket(device->channel, vstor_packet,
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sizeof(struct vstor_packet),
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(sizeof(struct vstor_packet) -
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vmscsi_size_delta),
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(unsigned long)request,
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VM_PKT_DATA_INBAND,
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
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@ -1017,7 +1115,8 @@ static void storvsc_on_channel_callback(void *context)
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do {
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ret = vmbus_recvpacket(device->channel, packet,
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ALIGN(sizeof(struct vstor_packet), 8),
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ALIGN((sizeof(struct vstor_packet) -
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vmscsi_size_delta), 8),
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&bytes_recvd, &request_id);
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if (ret == 0 && bytes_recvd > 0) {
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@ -1028,7 +1127,8 @@ static void storvsc_on_channel_callback(void *context)
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(request == &stor_device->reset_request)) {
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memcpy(&request->vstor_packet, packet,
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sizeof(struct vstor_packet));
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(sizeof(struct vstor_packet) -
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vmscsi_size_delta));
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complete(&request->wait_event);
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} else {
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storvsc_on_receive(device,
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@ -1121,10 +1221,11 @@ static int storvsc_do_io(struct hv_device *device,
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vstor_packet->flags |= REQUEST_COMPLETION_FLAG;
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vstor_packet->vm_srb.length = sizeof(struct vmscsi_request);
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vstor_packet->vm_srb.length = (sizeof(struct vmscsi_request) -
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vmscsi_size_delta);
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vstor_packet->vm_srb.sense_info_length = STORVSC_SENSE_BUFFER_SIZE;
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vstor_packet->vm_srb.sense_info_length = sense_buffer_size;
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vstor_packet->vm_srb.data_transfer_length =
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@ -1136,11 +1237,13 @@ static int storvsc_do_io(struct hv_device *device,
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ret = vmbus_sendpacket_multipagebuffer(device->channel,
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&request->data_buffer,
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vstor_packet,
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sizeof(struct vstor_packet),
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(sizeof(struct vstor_packet) -
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vmscsi_size_delta),
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(unsigned long)request);
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} else {
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ret = vmbus_sendpacket(device->channel, vstor_packet,
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sizeof(struct vstor_packet),
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(sizeof(struct vstor_packet) -
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vmscsi_size_delta),
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(unsigned long)request,
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VM_PKT_DATA_INBAND,
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
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@ -1264,7 +1367,8 @@ static int storvsc_host_reset_handler(struct scsi_cmnd *scmnd)
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vstor_packet->vm_srb.path_id = stor_device->path_id;
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ret = vmbus_sendpacket(device->channel, vstor_packet,
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sizeof(struct vstor_packet),
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(sizeof(struct vstor_packet) -
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vmscsi_size_delta),
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(unsigned long)&stor_device->reset_request,
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VM_PKT_DATA_INBAND,
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VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED);
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@ -1349,18 +1453,28 @@ static int storvsc_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *scmnd)
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scmnd->host_scribble = (unsigned char *)cmd_request;
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vm_srb = &cmd_request->vstor_packet.vm_srb;
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vm_srb->win8_extension.time_out_value = 60;
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/* Build the SRB */
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switch (scmnd->sc_data_direction) {
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case DMA_TO_DEVICE:
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vm_srb->data_in = WRITE_TYPE;
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vm_srb->win8_extension.srb_flags |= SRB_FLAGS_DATA_OUT;
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vm_srb->win8_extension.srb_flags |=
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(SRB_FLAGS_QUEUE_ACTION_ENABLE |
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SRB_FLAGS_DISABLE_SYNCH_TRANSFER);
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break;
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case DMA_FROM_DEVICE:
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vm_srb->data_in = READ_TYPE;
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vm_srb->win8_extension.srb_flags |= SRB_FLAGS_DATA_IN;
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vm_srb->win8_extension.srb_flags |=
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(SRB_FLAGS_QUEUE_ACTION_ENABLE |
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SRB_FLAGS_DISABLE_SYNCH_TRANSFER);
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break;
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default:
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vm_srb->data_in = UNKNOWN_TYPE;
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vm_srb->win8_extension.srb_flags = 0;
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break;
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}
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@ -1492,6 +1606,24 @@ static int storvsc_probe(struct hv_device *device,
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int target = 0;
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struct storvsc_device *stor_device;
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/*
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* Based on the windows host we are running on,
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* set state to properly communicate with the host.
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*/
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if (vmbus_proto_version == VERSION_WIN8) {
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sense_buffer_size = POST_WIN7_STORVSC_SENSE_BUFFER_SIZE;
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vmscsi_size_delta = 0;
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vmstor_current_major = VMSTOR_WIN8_MAJOR;
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vmstor_current_minor = VMSTOR_WIN8_MINOR;
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} else {
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sense_buffer_size = PRE_WIN8_STORVSC_SENSE_BUFFER_SIZE;
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vmscsi_size_delta = sizeof(struct vmscsi_win8_extension);
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vmstor_current_major = VMSTOR_WIN7_MAJOR;
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vmstor_current_minor = VMSTOR_WIN7_MINOR;
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}
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host = scsi_host_alloc(&scsi_driver,
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sizeof(struct hv_host_device));
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if (!host)
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@ -1601,7 +1733,8 @@ static int __init storvsc_drv_init(void)
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max_outstanding_req_per_channel =
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((storvsc_ringbuffer_size - PAGE_SIZE) /
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ALIGN(MAX_MULTIPAGE_BUFFER_PACKET +
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sizeof(struct vstor_packet) + sizeof(u64),
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sizeof(struct vstor_packet) + sizeof(u64) -
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vmscsi_size_delta,
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sizeof(u64)));
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if (max_outstanding_req_per_channel <
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