1*9e2b3e83SJuergen Gross /* SPDX-License-Identifier: MIT */ 2a42089ddSJeremy Fitzhardinge /****************************************************************************** 3a42089ddSJeremy Fitzhardinge * blkif.h 4a42089ddSJeremy Fitzhardinge * 5a42089ddSJeremy Fitzhardinge * Unified block-device I/O interface for Xen guest OSes. 6a42089ddSJeremy Fitzhardinge * 7a42089ddSJeremy Fitzhardinge * Copyright (c) 2003-2004, Keir Fraser 8a42089ddSJeremy Fitzhardinge */ 9a42089ddSJeremy Fitzhardinge 10a42089ddSJeremy Fitzhardinge #ifndef __XEN_PUBLIC_IO_BLKIF_H__ 11a42089ddSJeremy Fitzhardinge #define __XEN_PUBLIC_IO_BLKIF_H__ 12a42089ddSJeremy Fitzhardinge 13a1ce3928SDavid Howells #include <xen/interface/io/ring.h> 14a1ce3928SDavid Howells #include <xen/interface/grant_table.h> 15a42089ddSJeremy Fitzhardinge 16a42089ddSJeremy Fitzhardinge /* 17a42089ddSJeremy Fitzhardinge * Front->back notifications: When enqueuing a new request, sending a 18a42089ddSJeremy Fitzhardinge * notification can be made conditional on req_event (i.e., the generic 19a42089ddSJeremy Fitzhardinge * hold-off mechanism provided by the ring macros). Backends must set 20a42089ddSJeremy Fitzhardinge * req_event appropriately (e.g., using RING_FINAL_CHECK_FOR_REQUESTS()). 21a42089ddSJeremy Fitzhardinge * 22a42089ddSJeremy Fitzhardinge * Back->front notifications: When enqueuing a new response, sending a 23a42089ddSJeremy Fitzhardinge * notification can be made conditional on rsp_event (i.e., the generic 24a42089ddSJeremy Fitzhardinge * hold-off mechanism provided by the ring macros). Frontends must set 25a42089ddSJeremy Fitzhardinge * rsp_event appropriately (e.g., using RING_FINAL_CHECK_FOR_RESPONSES()). 26a42089ddSJeremy Fitzhardinge */ 27a42089ddSJeremy Fitzhardinge 28a42089ddSJeremy Fitzhardinge typedef uint16_t blkif_vdev_t; 29a42089ddSJeremy Fitzhardinge typedef uint64_t blkif_sector_t; 30a42089ddSJeremy Fitzhardinge 31a42089ddSJeremy Fitzhardinge /* 32eb5df87fSBob Liu * Multiple hardware queues/rings: 33eb5df87fSBob Liu * If supported, the backend will write the key "multi-queue-max-queues" to 34eb5df87fSBob Liu * the directory for that vbd, and set its value to the maximum supported 35eb5df87fSBob Liu * number of queues. 36eb5df87fSBob Liu * Frontends that are aware of this feature and wish to use it can write the 37eb5df87fSBob Liu * key "multi-queue-num-queues" with the number they wish to use, which must be 38eb5df87fSBob Liu * greater than zero, and no more than the value reported by the backend in 39eb5df87fSBob Liu * "multi-queue-max-queues". 40eb5df87fSBob Liu * 41eb5df87fSBob Liu * For frontends requesting just one queue, the usual event-channel and 42eb5df87fSBob Liu * ring-ref keys are written as before, simplifying the backend processing 43eb5df87fSBob Liu * to avoid distinguishing between a frontend that doesn't understand the 44eb5df87fSBob Liu * multi-queue feature, and one that does, but requested only one queue. 45eb5df87fSBob Liu * 46eb5df87fSBob Liu * Frontends requesting two or more queues must not write the toplevel 47eb5df87fSBob Liu * event-channel and ring-ref keys, instead writing those keys under sub-keys 48eb5df87fSBob Liu * having the name "queue-N" where N is the integer ID of the queue/ring for 49eb5df87fSBob Liu * which those keys belong. Queues are indexed from zero. 50eb5df87fSBob Liu * For example, a frontend with two queues must write the following set of 51eb5df87fSBob Liu * queue-related keys: 52eb5df87fSBob Liu * 53eb5df87fSBob Liu * /local/domain/1/device/vbd/0/multi-queue-num-queues = "2" 54eb5df87fSBob Liu * /local/domain/1/device/vbd/0/queue-0 = "" 55eb5df87fSBob Liu * /local/domain/1/device/vbd/0/queue-0/ring-ref = "<ring-ref#0>" 56eb5df87fSBob Liu * /local/domain/1/device/vbd/0/queue-0/event-channel = "<evtchn#0>" 57eb5df87fSBob Liu * /local/domain/1/device/vbd/0/queue-1 = "" 58eb5df87fSBob Liu * /local/domain/1/device/vbd/0/queue-1/ring-ref = "<ring-ref#1>" 59eb5df87fSBob Liu * /local/domain/1/device/vbd/0/queue-1/event-channel = "<evtchn#1>" 60eb5df87fSBob Liu * 61eb5df87fSBob Liu * It is also possible to use multiple queues/rings together with 62eb5df87fSBob Liu * feature multi-page ring buffer. 63eb5df87fSBob Liu * For example, a frontend requests two queues/rings and the size of each ring 64eb5df87fSBob Liu * buffer is two pages must write the following set of related keys: 65eb5df87fSBob Liu * 66eb5df87fSBob Liu * /local/domain/1/device/vbd/0/multi-queue-num-queues = "2" 67eb5df87fSBob Liu * /local/domain/1/device/vbd/0/ring-page-order = "1" 68eb5df87fSBob Liu * /local/domain/1/device/vbd/0/queue-0 = "" 69eb5df87fSBob Liu * /local/domain/1/device/vbd/0/queue-0/ring-ref0 = "<ring-ref#0>" 70eb5df87fSBob Liu * /local/domain/1/device/vbd/0/queue-0/ring-ref1 = "<ring-ref#1>" 71eb5df87fSBob Liu * /local/domain/1/device/vbd/0/queue-0/event-channel = "<evtchn#0>" 72eb5df87fSBob Liu * /local/domain/1/device/vbd/0/queue-1 = "" 73eb5df87fSBob Liu * /local/domain/1/device/vbd/0/queue-1/ring-ref0 = "<ring-ref#2>" 74eb5df87fSBob Liu * /local/domain/1/device/vbd/0/queue-1/ring-ref1 = "<ring-ref#3>" 75eb5df87fSBob Liu * /local/domain/1/device/vbd/0/queue-1/event-channel = "<evtchn#1>" 76eb5df87fSBob Liu * 77eb5df87fSBob Liu */ 78eb5df87fSBob Liu 79eb5df87fSBob Liu /* 80a42089ddSJeremy Fitzhardinge * REQUEST CODES. 81a42089ddSJeremy Fitzhardinge */ 82a42089ddSJeremy Fitzhardinge #define BLKIF_OP_READ 0 83a42089ddSJeremy Fitzhardinge #define BLKIF_OP_WRITE 1 84a42089ddSJeremy Fitzhardinge /* 85a42089ddSJeremy Fitzhardinge * Recognised only if "feature-barrier" is present in backend xenbus info. 86a42089ddSJeremy Fitzhardinge * The "feature_barrier" node contains a boolean indicating whether barrier 87a42089ddSJeremy Fitzhardinge * requests are likely to succeed or fail. Either way, a barrier request 88a42089ddSJeremy Fitzhardinge * may fail at any time with BLKIF_RSP_EOPNOTSUPP if it is unsupported by 89a42089ddSJeremy Fitzhardinge * the underlying block-device hardware. The boolean simply indicates whether 90a42089ddSJeremy Fitzhardinge * or not it is worthwhile for the frontend to attempt barrier requests. 91a42089ddSJeremy Fitzhardinge * If a backend does not recognise BLKIF_OP_WRITE_BARRIER, it should *not* 92a42089ddSJeremy Fitzhardinge * create the "feature-barrier" node! 93a42089ddSJeremy Fitzhardinge */ 94a42089ddSJeremy Fitzhardinge #define BLKIF_OP_WRITE_BARRIER 2 95a42089ddSJeremy Fitzhardinge 96a42089ddSJeremy Fitzhardinge /* 976dcfb751SKonrad Rzeszutek Wilk * Recognised if "feature-flush-cache" is present in backend xenbus 986dcfb751SKonrad Rzeszutek Wilk * info. A flush will ask the underlying storage hardware to flush its 996dcfb751SKonrad Rzeszutek Wilk * non-volatile caches as appropriate. The "feature-flush-cache" node 1006dcfb751SKonrad Rzeszutek Wilk * contains a boolean indicating whether flush requests are likely to 1016dcfb751SKonrad Rzeszutek Wilk * succeed or fail. Either way, a flush request may fail at any time 1026dcfb751SKonrad Rzeszutek Wilk * with BLKIF_RSP_EOPNOTSUPP if it is unsupported by the underlying 1036dcfb751SKonrad Rzeszutek Wilk * block-device hardware. The boolean simply indicates whether or not it 1046dcfb751SKonrad Rzeszutek Wilk * is worthwhile for the frontend to attempt flushes. If a backend does 1056dcfb751SKonrad Rzeszutek Wilk * not recognise BLKIF_OP_WRITE_FLUSH_CACHE, it should *not* create the 1066dcfb751SKonrad Rzeszutek Wilk * "feature-flush-cache" node! 1076dcfb751SKonrad Rzeszutek Wilk */ 1086dcfb751SKonrad Rzeszutek Wilk #define BLKIF_OP_FLUSH_DISKCACHE 3 10932a8d26cSLi Dongyang 11032a8d26cSLi Dongyang /* 11132a8d26cSLi Dongyang * Recognised only if "feature-discard" is present in backend xenbus info. 11232a8d26cSLi Dongyang * The "feature-discard" node contains a boolean indicating whether trim 11332a8d26cSLi Dongyang * (ATA) or unmap (SCSI) - conviently called discard requests are likely 11432a8d26cSLi Dongyang * to succeed or fail. Either way, a discard request 11532a8d26cSLi Dongyang * may fail at any time with BLKIF_RSP_EOPNOTSUPP if it is unsupported by 11632a8d26cSLi Dongyang * the underlying block-device hardware. The boolean simply indicates whether 11732a8d26cSLi Dongyang * or not it is worthwhile for the frontend to attempt discard requests. 11832a8d26cSLi Dongyang * If a backend does not recognise BLKIF_OP_DISCARD, it should *not* 11932a8d26cSLi Dongyang * create the "feature-discard" node! 12032a8d26cSLi Dongyang * 12132a8d26cSLi Dongyang * Discard operation is a request for the underlying block device to mark 12232a8d26cSLi Dongyang * extents to be erased. However, discard does not guarantee that the blocks 12332a8d26cSLi Dongyang * will be erased from the device - it is just a hint to the device 12432a8d26cSLi Dongyang * controller that these blocks are no longer in use. What the device 12532a8d26cSLi Dongyang * controller does with that information is left to the controller. 12632a8d26cSLi Dongyang * Discard operations are passed with sector_number as the 12732a8d26cSLi Dongyang * sector index to begin discard operations at and nr_sectors as the number of 12832a8d26cSLi Dongyang * sectors to be discarded. The specified sectors should be discarded if the 12932a8d26cSLi Dongyang * underlying block device supports trim (ATA) or unmap (SCSI) operations, 13032a8d26cSLi Dongyang * or a BLKIF_RSP_EOPNOTSUPP should be returned. 13132a8d26cSLi Dongyang * More information about trim/unmap operations at: 13232a8d26cSLi Dongyang * http://t13.org/Documents/UploadedDocuments/docs2008/ 13332a8d26cSLi Dongyang * e07154r6-Data_Set_Management_Proposal_for_ATA-ACS2.doc 13432a8d26cSLi Dongyang * http://www.seagate.com/staticfiles/support/disc/manuals/ 13532a8d26cSLi Dongyang * Interface%20manuals/100293068c.pdf 1365ea42986SKonrad Rzeszutek Wilk * The backend can optionally provide three extra XenBus attributes to 1375ea42986SKonrad Rzeszutek Wilk * further optimize the discard functionality: 1381c339ef7SOlaf Hering * 'discard-alignment' - Devices that support discard functionality may 1395ea42986SKonrad Rzeszutek Wilk * internally allocate space in units that are bigger than the exported 1405ea42986SKonrad Rzeszutek Wilk * logical block size. The discard-alignment parameter indicates how many bytes 1415ea42986SKonrad Rzeszutek Wilk * the beginning of the partition is offset from the internal allocation unit's 1425ea42986SKonrad Rzeszutek Wilk * natural alignment. 1435ea42986SKonrad Rzeszutek Wilk * 'discard-granularity' - Devices that support discard functionality may 1445ea42986SKonrad Rzeszutek Wilk * internally allocate space using units that are bigger than the logical block 1455ea42986SKonrad Rzeszutek Wilk * size. The discard-granularity parameter indicates the size of the internal 1465ea42986SKonrad Rzeszutek Wilk * allocation unit in bytes if reported by the device. Otherwise the 1475ea42986SKonrad Rzeszutek Wilk * discard-granularity will be set to match the device's physical block size. 1485ea42986SKonrad Rzeszutek Wilk * 'discard-secure' - All copies of the discarded sectors (potentially created 1495ea42986SKonrad Rzeszutek Wilk * by garbage collection) must also be erased. To use this feature, the flag 1505ea42986SKonrad Rzeszutek Wilk * BLKIF_DISCARD_SECURE must be set in the blkif_request_trim. 15132a8d26cSLi Dongyang */ 15232a8d26cSLi Dongyang #define BLKIF_OP_DISCARD 5 15332a8d26cSLi Dongyang 1546dcfb751SKonrad Rzeszutek Wilk /* 155402b27f9SRoger Pau Monne * Recognized if "feature-max-indirect-segments" in present in the backend 156402b27f9SRoger Pau Monne * xenbus info. The "feature-max-indirect-segments" node contains the maximum 157402b27f9SRoger Pau Monne * number of segments allowed by the backend per request. If the node is 158402b27f9SRoger Pau Monne * present, the frontend might use blkif_request_indirect structs in order to 159402b27f9SRoger Pau Monne * issue requests with more than BLKIF_MAX_SEGMENTS_PER_REQUEST (11). The 160402b27f9SRoger Pau Monne * maximum number of indirect segments is fixed by the backend, but the 161402b27f9SRoger Pau Monne * frontend can issue requests with any number of indirect segments as long as 162402b27f9SRoger Pau Monne * it's less than the number provided by the backend. The indirect_grefs field 163402b27f9SRoger Pau Monne * in blkif_request_indirect should be filled by the frontend with the 164402b27f9SRoger Pau Monne * grant references of the pages that are holding the indirect segments. 16580bfa2f6SRoger Pau Monne * These pages are filled with an array of blkif_request_segment that hold the 16680bfa2f6SRoger Pau Monne * information about the segments. The number of indirect pages to use is 16780bfa2f6SRoger Pau Monne * determined by the number of segments an indirect request contains. Every 16880bfa2f6SRoger Pau Monne * indirect page can contain a maximum of 16980bfa2f6SRoger Pau Monne * (PAGE_SIZE / sizeof(struct blkif_request_segment)) segments, so to 17080bfa2f6SRoger Pau Monne * calculate the number of indirect pages to use we have to do 17180bfa2f6SRoger Pau Monne * ceil(indirect_segments / (PAGE_SIZE / sizeof(struct blkif_request_segment))). 172402b27f9SRoger Pau Monne * 173402b27f9SRoger Pau Monne * If a backend does not recognize BLKIF_OP_INDIRECT, it should *not* 174402b27f9SRoger Pau Monne * create the "feature-max-indirect-segments" node! 175402b27f9SRoger Pau Monne */ 176402b27f9SRoger Pau Monne #define BLKIF_OP_INDIRECT 6 177402b27f9SRoger Pau Monne 178402b27f9SRoger Pau Monne /* 179a42089ddSJeremy Fitzhardinge * Maximum scatter/gather segments per request. 180a42089ddSJeremy Fitzhardinge * This is carefully chosen so that sizeof(struct blkif_ring) <= PAGE_SIZE. 181a42089ddSJeremy Fitzhardinge * NB. This could be 12 if the ring indexes weren't stored in the same page. 182a42089ddSJeremy Fitzhardinge */ 183a42089ddSJeremy Fitzhardinge #define BLKIF_MAX_SEGMENTS_PER_REQUEST 11 184a42089ddSJeremy Fitzhardinge 185402b27f9SRoger Pau Monne #define BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST 8 186402b27f9SRoger Pau Monne 18780bfa2f6SRoger Pau Monne struct blkif_request_segment { 188402b27f9SRoger Pau Monne grant_ref_t gref; /* reference to I/O buffer frame */ 189402b27f9SRoger Pau Monne /* @first_sect: first sector in frame to transfer (inclusive). */ 190402b27f9SRoger Pau Monne /* @last_sect: last sector in frame to transfer (inclusive). */ 191402b27f9SRoger Pau Monne uint8_t first_sect, last_sect; 19280bfa2f6SRoger Pau Monne }; 193402b27f9SRoger Pau Monne 19451de6952SOwen Smith struct blkif_request_rw { 19597e36834SKonrad Rzeszutek Wilk uint8_t nr_segments; /* number of segments */ 19697e36834SKonrad Rzeszutek Wilk blkif_vdev_t handle; /* only for read/write requests */ 197380108d8SJulien Grall #ifndef CONFIG_X86_32 19897e36834SKonrad Rzeszutek Wilk uint32_t _pad1; /* offsetof(blkif_request,u.rw.id) == 8 */ 19997e36834SKonrad Rzeszutek Wilk #endif 20097e36834SKonrad Rzeszutek Wilk uint64_t id; /* private guest value, echoed in resp */ 201a42089ddSJeremy Fitzhardinge blkif_sector_t sector_number;/* start sector idx on disk (r/w only) */ 20280bfa2f6SRoger Pau Monne struct blkif_request_segment seg[BLKIF_MAX_SEGMENTS_PER_REQUEST]; 20397e36834SKonrad Rzeszutek Wilk } __attribute__((__packed__)); 204a42089ddSJeremy Fitzhardinge 20532a8d26cSLi Dongyang struct blkif_request_discard { 2065ea42986SKonrad Rzeszutek Wilk uint8_t flag; /* BLKIF_DISCARD_SECURE or zero. */ 2075ea42986SKonrad Rzeszutek Wilk #define BLKIF_DISCARD_SECURE (1<<0) /* ignored if discard-secure=0 */ 20897e36834SKonrad Rzeszutek Wilk blkif_vdev_t _pad1; /* only for read/write requests */ 209380108d8SJulien Grall #ifndef CONFIG_X86_32 21097e36834SKonrad Rzeszutek Wilk uint32_t _pad2; /* offsetof(blkif_req..,u.discard.id)==8*/ 21197e36834SKonrad Rzeszutek Wilk #endif 21297e36834SKonrad Rzeszutek Wilk uint64_t id; /* private guest value, echoed in resp */ 21332a8d26cSLi Dongyang blkif_sector_t sector_number; 21432a8d26cSLi Dongyang uint64_t nr_sectors; 21597e36834SKonrad Rzeszutek Wilk uint8_t _pad3; 21697e36834SKonrad Rzeszutek Wilk } __attribute__((__packed__)); 21732a8d26cSLi Dongyang 2180e367ae4SDavid Vrabel struct blkif_request_other { 2190e367ae4SDavid Vrabel uint8_t _pad1; 2200e367ae4SDavid Vrabel blkif_vdev_t _pad2; /* only for read/write requests */ 221380108d8SJulien Grall #ifndef CONFIG_X86_32 2220e367ae4SDavid Vrabel uint32_t _pad3; /* offsetof(blkif_req..,u.other.id)==8*/ 2230e367ae4SDavid Vrabel #endif 2240e367ae4SDavid Vrabel uint64_t id; /* private guest value, echoed in resp */ 2250e367ae4SDavid Vrabel } __attribute__((__packed__)); 2260e367ae4SDavid Vrabel 227402b27f9SRoger Pau Monne struct blkif_request_indirect { 228402b27f9SRoger Pau Monne uint8_t indirect_op; 229402b27f9SRoger Pau Monne uint16_t nr_segments; 230380108d8SJulien Grall #ifndef CONFIG_X86_32 231402b27f9SRoger Pau Monne uint32_t _pad1; /* offsetof(blkif_...,u.indirect.id) == 8 */ 232402b27f9SRoger Pau Monne #endif 233402b27f9SRoger Pau Monne uint64_t id; 234402b27f9SRoger Pau Monne blkif_sector_t sector_number; 235402b27f9SRoger Pau Monne blkif_vdev_t handle; 236402b27f9SRoger Pau Monne uint16_t _pad2; 237402b27f9SRoger Pau Monne grant_ref_t indirect_grefs[BLKIF_MAX_INDIRECT_PAGES_PER_REQUEST]; 238380108d8SJulien Grall #ifndef CONFIG_X86_32 239402b27f9SRoger Pau Monne uint32_t _pad3; /* make it 64 byte aligned */ 240402b27f9SRoger Pau Monne #else 241402b27f9SRoger Pau Monne uint64_t _pad3; /* make it 64 byte aligned */ 242402b27f9SRoger Pau Monne #endif 243402b27f9SRoger Pau Monne } __attribute__((__packed__)); 244402b27f9SRoger Pau Monne 24551de6952SOwen Smith struct blkif_request { 24651de6952SOwen Smith uint8_t operation; /* BLKIF_OP_??? */ 24751de6952SOwen Smith union { 24851de6952SOwen Smith struct blkif_request_rw rw; 24932a8d26cSLi Dongyang struct blkif_request_discard discard; 2500e367ae4SDavid Vrabel struct blkif_request_other other; 251402b27f9SRoger Pau Monne struct blkif_request_indirect indirect; 25251de6952SOwen Smith } u; 25397e36834SKonrad Rzeszutek Wilk } __attribute__((__packed__)); 25451de6952SOwen Smith 255a42089ddSJeremy Fitzhardinge struct blkif_response { 256a42089ddSJeremy Fitzhardinge uint64_t id; /* copied from request */ 257a42089ddSJeremy Fitzhardinge uint8_t operation; /* copied from request */ 258a42089ddSJeremy Fitzhardinge int16_t status; /* BLKIF_RSP_??? */ 259a42089ddSJeremy Fitzhardinge }; 260a42089ddSJeremy Fitzhardinge 261a42089ddSJeremy Fitzhardinge /* 262a42089ddSJeremy Fitzhardinge * STATUS RETURN CODES. 263a42089ddSJeremy Fitzhardinge */ 264a42089ddSJeremy Fitzhardinge /* Operation not supported (only happens on barrier writes). */ 265a42089ddSJeremy Fitzhardinge #define BLKIF_RSP_EOPNOTSUPP -2 266a42089ddSJeremy Fitzhardinge /* Operation failed for some unspecified reason (-EIO). */ 267a42089ddSJeremy Fitzhardinge #define BLKIF_RSP_ERROR -1 268a42089ddSJeremy Fitzhardinge /* Operation completed successfully. */ 269a42089ddSJeremy Fitzhardinge #define BLKIF_RSP_OKAY 0 270a42089ddSJeremy Fitzhardinge 271a42089ddSJeremy Fitzhardinge /* 272a42089ddSJeremy Fitzhardinge * Generate blkif ring structures and types. 273a42089ddSJeremy Fitzhardinge */ 274a42089ddSJeremy Fitzhardinge 275a42089ddSJeremy Fitzhardinge DEFINE_RING_TYPES(blkif, struct blkif_request, struct blkif_response); 276a42089ddSJeremy Fitzhardinge 277a42089ddSJeremy Fitzhardinge #define VDISK_CDROM 0x1 278a42089ddSJeremy Fitzhardinge #define VDISK_REMOVABLE 0x2 279a42089ddSJeremy Fitzhardinge #define VDISK_READONLY 0x4 280a42089ddSJeremy Fitzhardinge 281c80a4209SStefano Stabellini /* Xen-defined major numbers for virtual disks, they look strangely 282c80a4209SStefano Stabellini * familiar */ 283c80a4209SStefano Stabellini #define XEN_IDE0_MAJOR 3 284c80a4209SStefano Stabellini #define XEN_IDE1_MAJOR 22 285c80a4209SStefano Stabellini #define XEN_SCSI_DISK0_MAJOR 8 286c80a4209SStefano Stabellini #define XEN_SCSI_DISK1_MAJOR 65 287c80a4209SStefano Stabellini #define XEN_SCSI_DISK2_MAJOR 66 288c80a4209SStefano Stabellini #define XEN_SCSI_DISK3_MAJOR 67 289c80a4209SStefano Stabellini #define XEN_SCSI_DISK4_MAJOR 68 290c80a4209SStefano Stabellini #define XEN_SCSI_DISK5_MAJOR 69 291c80a4209SStefano Stabellini #define XEN_SCSI_DISK6_MAJOR 70 292c80a4209SStefano Stabellini #define XEN_SCSI_DISK7_MAJOR 71 293c80a4209SStefano Stabellini #define XEN_SCSI_DISK8_MAJOR 128 294c80a4209SStefano Stabellini #define XEN_SCSI_DISK9_MAJOR 129 295c80a4209SStefano Stabellini #define XEN_SCSI_DISK10_MAJOR 130 296c80a4209SStefano Stabellini #define XEN_SCSI_DISK11_MAJOR 131 297c80a4209SStefano Stabellini #define XEN_SCSI_DISK12_MAJOR 132 298c80a4209SStefano Stabellini #define XEN_SCSI_DISK13_MAJOR 133 299c80a4209SStefano Stabellini #define XEN_SCSI_DISK14_MAJOR 134 300c80a4209SStefano Stabellini #define XEN_SCSI_DISK15_MAJOR 135 301c80a4209SStefano Stabellini 302a42089ddSJeremy Fitzhardinge #endif /* __XEN_PUBLIC_IO_BLKIF_H__ */ 303