2 * VMware PVSCSI header file
4 * Copyright (C) 2008-2014, VMware, Inc. All Rights Reserved.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; version 2 of the License and no later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
13 * NON INFRINGEMENT. See the GNU General Public License for more
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 * Maintained by: Jim Gill <jgill@vmware.com>
24 #ifndef _VMW_PVSCSI_H_
25 #define _VMW_PVSCSI_H_
27 #include <linux/types.h>
29 #define PVSCSI_DRIVER_VERSION_STRING "1.0.7.0-k"
31 #define PVSCSI_MAX_NUM_SG_ENTRIES_PER_SEGMENT 128
33 #define MASK(n) ((1 << (n)) - 1) /* make an n-bit mask */
35 #define PCI_DEVICE_ID_VMWARE_PVSCSI 0x07C0
38 * host adapter status/error codes
40 enum HostBusAdapterStatus {
41 BTSTAT_SUCCESS = 0x00, /* CCB complete normally with no errors */
42 BTSTAT_LINKED_COMMAND_COMPLETED = 0x0a,
43 BTSTAT_LINKED_COMMAND_COMPLETED_WITH_FLAG = 0x0b,
44 BTSTAT_DATA_UNDERRUN = 0x0c,
45 BTSTAT_SELTIMEO = 0x11, /* SCSI selection timeout */
46 BTSTAT_DATARUN = 0x12, /* data overrun/underrun */
47 BTSTAT_BUSFREE = 0x13, /* unexpected bus free */
48 BTSTAT_INVPHASE = 0x14, /* invalid bus phase or sequence
49 * requested by target */
50 BTSTAT_LUNMISMATCH = 0x17, /* linked CCB has different LUN from
52 BTSTAT_INVPARAM = 0x1a, /* invalid parameter in CCB or segment
54 BTSTAT_SENSFAILED = 0x1b, /* auto request sense failed */
55 BTSTAT_TAGREJECT = 0x1c, /* SCSI II tagged queueing message
56 * rejected by target */
57 BTSTAT_BADMSG = 0x1d, /* unsupported message received by the
59 BTSTAT_HAHARDWARE = 0x20, /* host adapter hardware failed */
60 BTSTAT_NORESPONSE = 0x21, /* target did not respond to SCSI ATN,
62 BTSTAT_SENTRST = 0x22, /* host adapter asserted a SCSI RST */
63 BTSTAT_RECVRST = 0x23, /* other SCSI devices asserted a SCSI
65 BTSTAT_DISCONNECT = 0x24, /* target device reconnected improperly
67 BTSTAT_BUSRESET = 0x25, /* host adapter issued BUS device reset */
68 BTSTAT_ABORTQUEUE = 0x26, /* abort queue generated */
69 BTSTAT_HASOFTWARE = 0x27, /* host adapter software error */
70 BTSTAT_HATIMEOUT = 0x30, /* host adapter hardware timeout error */
71 BTSTAT_SCSIPARITY = 0x34, /* SCSI parity error detected */
75 * SCSI device status values.
77 enum ScsiDeviceStatus {
78 SDSTAT_GOOD = 0x00, /* No errors. */
79 SDSTAT_CHECK = 0x02, /* Check condition. */
85 * These registers are accessible both via i/o space and mm i/o.
88 enum PVSCSIRegOffset {
89 PVSCSI_REG_OFFSET_COMMAND = 0x0,
90 PVSCSI_REG_OFFSET_COMMAND_DATA = 0x4,
91 PVSCSI_REG_OFFSET_COMMAND_STATUS = 0x8,
92 PVSCSI_REG_OFFSET_LAST_STS_0 = 0x100,
93 PVSCSI_REG_OFFSET_LAST_STS_1 = 0x104,
94 PVSCSI_REG_OFFSET_LAST_STS_2 = 0x108,
95 PVSCSI_REG_OFFSET_LAST_STS_3 = 0x10c,
96 PVSCSI_REG_OFFSET_INTR_STATUS = 0x100c,
97 PVSCSI_REG_OFFSET_INTR_MASK = 0x2010,
98 PVSCSI_REG_OFFSET_KICK_NON_RW_IO = 0x3014,
99 PVSCSI_REG_OFFSET_DEBUG = 0x3018,
100 PVSCSI_REG_OFFSET_KICK_RW_IO = 0x4018,
104 * Virtual h/w commands.
107 enum PVSCSICommands {
108 PVSCSI_CMD_FIRST = 0, /* has to be first */
110 PVSCSI_CMD_ADAPTER_RESET = 1,
111 PVSCSI_CMD_ISSUE_SCSI = 2,
112 PVSCSI_CMD_SETUP_RINGS = 3,
113 PVSCSI_CMD_RESET_BUS = 4,
114 PVSCSI_CMD_RESET_DEVICE = 5,
115 PVSCSI_CMD_ABORT_CMD = 6,
116 PVSCSI_CMD_CONFIG = 7,
117 PVSCSI_CMD_SETUP_MSG_RING = 8,
118 PVSCSI_CMD_DEVICE_UNPLUG = 9,
119 PVSCSI_CMD_SETUP_REQCALLTHRESHOLD = 10,
121 PVSCSI_CMD_LAST = 11 /* has to be last */
125 * Command descriptor for PVSCSI_CMD_RESET_DEVICE --
128 struct PVSCSICmdDescResetDevice {
134 * Command descriptor for PVSCSI_CMD_CONFIG --
137 struct PVSCSICmdDescConfigCmd {
139 u64 configPageAddress;
145 * Command descriptor for PVSCSI_CMD_SETUP_REQCALLTHRESHOLD --
148 struct PVSCSICmdDescSetupReqCall {
152 enum PVSCSIConfigPageType {
153 PVSCSI_CONFIG_PAGE_CONTROLLER = 0x1958,
154 PVSCSI_CONFIG_PAGE_PHY = 0x1959,
155 PVSCSI_CONFIG_PAGE_DEVICE = 0x195a,
158 enum PVSCSIConfigPageAddressType {
159 PVSCSI_CONFIG_CONTROLLER_ADDRESS = 0x2120,
160 PVSCSI_CONFIG_BUSTARGET_ADDRESS = 0x2121,
161 PVSCSI_CONFIG_PHY_ADDRESS = 0x2122,
165 * Command descriptor for PVSCSI_CMD_ABORT_CMD --
167 * - currently does not support specifying the LUN.
168 * - _pad should be 0.
171 struct PVSCSICmdDescAbortCmd {
178 * Command descriptor for PVSCSI_CMD_SETUP_RINGS --
181 * - reqRingNumPages and cmpRingNumPages need to be power of two.
182 * - reqRingNumPages and cmpRingNumPages need to be different from 0,
183 * - reqRingNumPages and cmpRingNumPages need to be inferior to
184 * PVSCSI_SETUP_RINGS_MAX_NUM_PAGES.
187 #define PVSCSI_SETUP_RINGS_MAX_NUM_PAGES 32
188 struct PVSCSICmdDescSetupRings {
192 u64 reqRingPPNs[PVSCSI_SETUP_RINGS_MAX_NUM_PAGES];
193 u64 cmpRingPPNs[PVSCSI_SETUP_RINGS_MAX_NUM_PAGES];
197 * Command descriptor for PVSCSI_CMD_SETUP_MSG_RING --
200 * - this command was not supported in the initial revision of the h/w
201 * interface. Before using it, you need to check that it is supported by
202 * writing PVSCSI_CMD_SETUP_MSG_RING to the 'command' register, then
203 * immediately after read the 'command status' register:
204 * * a value of -1 means that the cmd is NOT supported,
205 * * a value != -1 means that the cmd IS supported.
206 * If it's supported the 'command status' register should return:
207 * sizeof(PVSCSICmdDescSetupMsgRing) / sizeof(u32).
208 * - this command should be issued _after_ the usual SETUP_RINGS so that the
209 * RingsState page is already setup. If not, the command is a nop.
210 * - numPages needs to be a power of two,
211 * - numPages needs to be different from 0,
212 * - _pad should be zero.
215 #define PVSCSI_SETUP_MSG_RING_MAX_NUM_PAGES 16
217 struct PVSCSICmdDescSetupMsgRing {
220 u64 ringPPNs[PVSCSI_SETUP_MSG_RING_MAX_NUM_PAGES];
224 PVSCSI_MSG_DEV_ADDED = 0,
225 PVSCSI_MSG_DEV_REMOVED = 1,
232 * sizeof(struct PVSCSIRingMsgDesc) == 128.
234 * - type is of type enum PVSCSIMsgType.
235 * - the content of args depend on the type of event being delivered.
238 struct PVSCSIRingMsgDesc {
243 struct PVSCSIMsgDescDevStatusChanged {
244 u32 type; /* PVSCSI_MSG_DEV _ADDED / _REMOVED */
257 * . msgNumEntriesLog2,
258 * .. are only used once the SETUP_MSG_RING cmd has been issued.
259 * - '_pad' helps to ensure that the msg related fields are on their own
263 struct PVSCSIRingsState {
266 u32 reqNumEntriesLog2;
270 u32 cmpNumEntriesLog2;
272 u32 reqCallThreshold;
278 u32 msgNumEntriesLog2;
282 * Request descriptor.
284 * sizeof(RingReqDesc) = 128
286 * - context: is a unique identifier of a command. It could normally be any
287 * 64bit value, however we currently store it in the serialNumber variable
288 * of struct SCSI_Command, so we have the following restrictions due to the
289 * way this field is handled in the vmkernel storage stack:
290 * * this value can't be 0,
291 * * the upper 32bit need to be 0 since serialNumber is as a u32.
292 * Currently tracked as PR 292060.
293 * - dataLen: contains the total number of bytes that need to be transferred.
295 * * if PVSCSI_FLAG_CMD_WITH_SG_LIST is set: dataAddr is the PA of the first
296 * s/g table segment, each s/g segment is entirely contained on a single
297 * page of physical memory,
298 * * if PVSCSI_FLAG_CMD_WITH_SG_LIST is NOT set, then dataAddr is the PA of
299 * the buffer used for the DMA transfer,
301 * * PVSCSI_FLAG_CMD_WITH_SG_LIST: see dataAddr above,
302 * * PVSCSI_FLAG_CMD_DIR_NONE: no DMA involved,
303 * * PVSCSI_FLAG_CMD_DIR_TOHOST: transfer from device to main memory,
304 * * PVSCSI_FLAG_CMD_DIR_TODEVICE: transfer from main memory to device,
305 * * PVSCSI_FLAG_CMD_OUT_OF_BAND_CDB: reserved to handle CDBs larger than
306 * 16bytes. To be specified.
307 * - vcpuHint: vcpuId of the processor that will be most likely waiting for the
308 * completion of the i/o. For guest OSes that use lowest priority message
309 * delivery mode (such as windows), we use this "hint" to deliver the
310 * completion action to the proper vcpu. For now, we can use the vcpuId of
311 * the processor that initiated the i/o as a likely candidate for the vcpu
312 * that will be waiting for the completion..
313 * - bus should be 0: we currently only support bus 0 for now.
314 * - unused should be zero'd.
317 #define PVSCSI_FLAG_CMD_WITH_SG_LIST (1 << 0)
318 #define PVSCSI_FLAG_CMD_OUT_OF_BAND_CDB (1 << 1)
319 #define PVSCSI_FLAG_CMD_DIR_NONE (1 << 2)
320 #define PVSCSI_FLAG_CMD_DIR_TOHOST (1 << 3)
321 #define PVSCSI_FLAG_CMD_DIR_TODEVICE (1 << 4)
323 struct PVSCSIRingReqDesc {
341 * Scatter-gather list management.
343 * As described above, when PVSCSI_FLAG_CMD_WITH_SG_LIST is set in the
344 * RingReqDesc.flags, then RingReqDesc.dataAddr is the PA of the first s/g
347 * - each segment of the s/g table contain a succession of struct
349 * - each segment is entirely contained on a single physical page of memory.
350 * - a "chain" s/g element has the flag PVSCSI_SGE_FLAG_CHAIN_ELEMENT set in
351 * PVSCSISGElement.flags and in this case:
352 * * addr is the PA of the next s/g segment,
353 * * length is undefined, assumed to be 0.
356 struct PVSCSISGElement {
363 * Completion descriptor.
365 * sizeof(RingCmpDesc) = 32
367 * - context: identifier of the command. The same thing that was specified
368 * under "context" as part of struct RingReqDesc at initiation time,
369 * - dataLen: number of bytes transferred for the actual i/o operation,
370 * - senseLen: number of bytes written into the sense buffer,
371 * - hostStatus: adapter status,
372 * - scsiStatus: device status,
373 * - _pad should be zero.
376 struct PVSCSIRingCmpDesc {
385 struct PVSCSIConfigPageHeader {
393 struct PVSCSIConfigPageController {
394 struct PVSCSIConfigPageHeader header;
395 u64 nodeWWN; /* Device name as defined in the SAS spec. */
396 u16 manufacturer[64];
397 u16 serialNumber[64];
398 u16 opromVersion[32];
400 u16 firmwareVersion[32];
402 u8 useConsecutivePhyWWNs;
407 * Interrupt status / IRQ bits.
410 #define PVSCSI_INTR_CMPL_0 (1 << 0)
411 #define PVSCSI_INTR_CMPL_1 (1 << 1)
412 #define PVSCSI_INTR_CMPL_MASK MASK(2)
414 #define PVSCSI_INTR_MSG_0 (1 << 2)
415 #define PVSCSI_INTR_MSG_1 (1 << 3)
416 #define PVSCSI_INTR_MSG_MASK (MASK(2) << 2)
418 #define PVSCSI_INTR_ALL_SUPPORTED MASK(4)
421 * Number of MSI-X vectors supported.
423 #define PVSCSI_MAX_INTRS 24
426 * Misc constants for the rings.
429 #define PVSCSI_MAX_NUM_PAGES_REQ_RING PVSCSI_SETUP_RINGS_MAX_NUM_PAGES
430 #define PVSCSI_MAX_NUM_PAGES_CMP_RING PVSCSI_SETUP_RINGS_MAX_NUM_PAGES
431 #define PVSCSI_MAX_NUM_PAGES_MSG_RING PVSCSI_SETUP_MSG_RING_MAX_NUM_PAGES
433 #define PVSCSI_MAX_NUM_REQ_ENTRIES_PER_PAGE \
434 (PAGE_SIZE / sizeof(struct PVSCSIRingReqDesc))
436 #define PVSCSI_MAX_REQ_QUEUE_DEPTH \
437 (PVSCSI_MAX_NUM_PAGES_REQ_RING * PVSCSI_MAX_NUM_REQ_ENTRIES_PER_PAGE)
439 #define PVSCSI_MEM_SPACE_COMMAND_NUM_PAGES 1
440 #define PVSCSI_MEM_SPACE_INTR_STATUS_NUM_PAGES 1
441 #define PVSCSI_MEM_SPACE_MISC_NUM_PAGES 2
442 #define PVSCSI_MEM_SPACE_KICK_IO_NUM_PAGES 2
443 #define PVSCSI_MEM_SPACE_MSIX_NUM_PAGES 2
445 enum PVSCSIMemSpace {
446 PVSCSI_MEM_SPACE_COMMAND_PAGE = 0,
447 PVSCSI_MEM_SPACE_INTR_STATUS_PAGE = 1,
448 PVSCSI_MEM_SPACE_MISC_PAGE = 2,
449 PVSCSI_MEM_SPACE_KICK_IO_PAGE = 4,
450 PVSCSI_MEM_SPACE_MSIX_TABLE_PAGE = 6,
451 PVSCSI_MEM_SPACE_MSIX_PBA_PAGE = 7,
454 #define PVSCSI_MEM_SPACE_NUM_PAGES \
455 (PVSCSI_MEM_SPACE_COMMAND_NUM_PAGES + \
456 PVSCSI_MEM_SPACE_INTR_STATUS_NUM_PAGES + \
457 PVSCSI_MEM_SPACE_MISC_NUM_PAGES + \
458 PVSCSI_MEM_SPACE_KICK_IO_NUM_PAGES + \
459 PVSCSI_MEM_SPACE_MSIX_NUM_PAGES)
461 #define PVSCSI_MEM_SPACE_SIZE (PVSCSI_MEM_SPACE_NUM_PAGES * PAGE_SIZE)
463 #endif /* _VMW_PVSCSI_H_ */