drivers/scsi/vmw_pvscsi.h

4  * Copyright (C) 2008-2014, VMware, Inc. All Rights Reserved.
6  * This program is free software; you can redistribute it and/or modify it
8  * Free Software Foundation; version 2 of the License and no later version.
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.
27 #define PVSCSI_DRIVER_VERSION_STRING   "1.0.7.0-k"
31 #define MASK(n)        ((1 << (n)) - 1)        /* make an n-bit mask */
67 	BTSTAT_HASOFTWARE    = 0x27,  /* host adapter software error */
123  * Command descriptor for PVSCSI_CMD_RESET_DEVICE --
132  * Command descriptor for PVSCSI_CMD_CONFIG --
143  * Command descriptor for PVSCSI_CMD_SETUP_REQCALLTHRESHOLD --
163  * Command descriptor for PVSCSI_CMD_ABORT_CMD --
165  * - currently does not support specifying the LUN.
166  * - _pad should be 0.
176  * Command descriptor for PVSCSI_CMD_SETUP_RINGS --
179  * - reqRingNumPages and cmpRingNumPages need to be power of two.
180  * - reqRingNumPages and cmpRingNumPages need to be different from 0,
181  * - reqRingNumPages and cmpRingNumPages need to be inferior to
195  * Command descriptor for PVSCSI_CMD_SETUP_MSG_RING --
198  * - this command was not supported in the initial revision of the h/w
202  *       * a value of -1 means that the cmd is NOT supported,
203  *       * a value != -1 means that the cmd IS supported.
206  * - this command should be issued _after_ the usual SETUP_RINGS so that the
208  * - numPages needs to be a power of two,
209  * - numPages needs to be different from 0,
210  * - _pad should be zero.
232  * - type is of type enum PVSCSIMsgType.
233  * - the content of args depend on the type of event being delivered.
252  * - the fields:
257  * - '_pad' helps to ensure that the msg related fields are on their own
258  *   cache-line.
284  * - context: is a unique identifier of a command. It could normally be any
291  * - dataLen: contains the total number of bytes that need to be transferred.
292  * - dataAddr:
298  * - flags:
305  * - vcpuHint: vcpuId of the processor that will be most likely waiting for the
309  *   the processor that initiated the i/o as a likely candidate for the vcpu
311  * - bus should be 0: we currently only support bus 0 for now.
312  * - unused should be zero'd.
339  * Scatter-gather list management.
345  * - each segment of the s/g table contain a succession of struct
347  * - each segment is entirely contained on a single physical page of memory.
348  * - a "chain" s/g element has the flag PVSCSI_SGE_FLAG_CHAIN_ELEMENT set in
365  * - context: identifier of the command. The same thing that was specified
367  * - dataLen: number of bytes transferred for the actual i/o operation,
368  * - senseLen: number of bytes written into the sense buffer,
369  * - hostStatus: adapter status,
370  * - scsiStatus: device status,
371  * - _pad should be zero.
419  * Number of MSI-X vectors supported.