root / hw / spapr_vscsi.c @ 43a2b339
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1 | 6e270446 | Ben Herrenschmidt | /*
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2 | 6e270446 | Ben Herrenschmidt | * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
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3 | 6e270446 | Ben Herrenschmidt | *
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4 | 6e270446 | Ben Herrenschmidt | * PAPR Virtual SCSI, aka ibmvscsi
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5 | 6e270446 | Ben Herrenschmidt | *
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6 | 6e270446 | Ben Herrenschmidt | * Copyright (c) 2010,2011 Benjamin Herrenschmidt, IBM Corporation.
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7 | 6e270446 | Ben Herrenschmidt | *
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8 | 6e270446 | Ben Herrenschmidt | * Permission is hereby granted, free of charge, to any person obtaining a copy
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9 | 6e270446 | Ben Herrenschmidt | * of this software and associated documentation files (the "Software"), to deal
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10 | 6e270446 | Ben Herrenschmidt | * in the Software without restriction, including without limitation the rights
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11 | 6e270446 | Ben Herrenschmidt | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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12 | 6e270446 | Ben Herrenschmidt | * copies of the Software, and to permit persons to whom the Software is
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13 | 6e270446 | Ben Herrenschmidt | * furnished to do so, subject to the following conditions:
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14 | 6e270446 | Ben Herrenschmidt | *
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15 | 6e270446 | Ben Herrenschmidt | * The above copyright notice and this permission notice shall be included in
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16 | 6e270446 | Ben Herrenschmidt | * all copies or substantial portions of the Software.
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17 | 6e270446 | Ben Herrenschmidt | *
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18 | 6e270446 | Ben Herrenschmidt | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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19 | 6e270446 | Ben Herrenschmidt | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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20 | 6e270446 | Ben Herrenschmidt | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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21 | 6e270446 | Ben Herrenschmidt | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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22 | 6e270446 | Ben Herrenschmidt | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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23 | 6e270446 | Ben Herrenschmidt | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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24 | 6e270446 | Ben Herrenschmidt | * THE SOFTWARE.
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25 | 6e270446 | Ben Herrenschmidt | *
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26 | 6e270446 | Ben Herrenschmidt | * TODO:
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27 | 6e270446 | Ben Herrenschmidt | *
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28 | 6e270446 | Ben Herrenschmidt | * - Cleanups :-)
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29 | 6e270446 | Ben Herrenschmidt | * - Sort out better how to assign devices to VSCSI instances
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30 | 6e270446 | Ben Herrenschmidt | * - Fix residual counts
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31 | 6e270446 | Ben Herrenschmidt | * - Add indirect descriptors support
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32 | 6e270446 | Ben Herrenschmidt | * - Maybe do autosense (PAPR seems to mandate it, linux doesn't care)
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33 | 6e270446 | Ben Herrenschmidt | */
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34 | 6e270446 | Ben Herrenschmidt | #include "hw.h" |
35 | 6e270446 | Ben Herrenschmidt | #include "scsi.h" |
36 | 6e270446 | Ben Herrenschmidt | #include "scsi-defs.h" |
37 | 6e270446 | Ben Herrenschmidt | #include "net.h" /* Remove that when we can */ |
38 | 6e270446 | Ben Herrenschmidt | #include "srp.h" |
39 | 6e270446 | Ben Herrenschmidt | #include "hw/qdev.h" |
40 | 6e270446 | Ben Herrenschmidt | #include "hw/spapr.h" |
41 | 6e270446 | Ben Herrenschmidt | #include "hw/spapr_vio.h" |
42 | 6e270446 | Ben Herrenschmidt | #include "hw/ppc-viosrp.h" |
43 | 6e270446 | Ben Herrenschmidt | |
44 | 6e270446 | Ben Herrenschmidt | #include <libfdt.h> |
45 | 6e270446 | Ben Herrenschmidt | |
46 | 6e270446 | Ben Herrenschmidt | /*#define DEBUG_VSCSI*/
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47 | 6e270446 | Ben Herrenschmidt | |
48 | 6e270446 | Ben Herrenschmidt | #ifdef DEBUG_VSCSI
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49 | 6e270446 | Ben Herrenschmidt | #define dprintf(fmt, ...) \
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50 | 6e270446 | Ben Herrenschmidt | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
51 | 6e270446 | Ben Herrenschmidt | #else
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52 | 6e270446 | Ben Herrenschmidt | #define dprintf(fmt, ...) \
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53 | 6e270446 | Ben Herrenschmidt | do { } while (0) |
54 | 6e270446 | Ben Herrenschmidt | #endif
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55 | 6e270446 | Ben Herrenschmidt | |
56 | 6e270446 | Ben Herrenschmidt | /*
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57 | 6e270446 | Ben Herrenschmidt | * Virtual SCSI device
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58 | 6e270446 | Ben Herrenschmidt | */
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59 | 6e270446 | Ben Herrenschmidt | |
60 | 6e270446 | Ben Herrenschmidt | /* Random numbers */
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61 | 6e270446 | Ben Herrenschmidt | #define VSCSI_MAX_SECTORS 4096 |
62 | 6e270446 | Ben Herrenschmidt | #define VSCSI_REQ_LIMIT 24 |
63 | 6e270446 | Ben Herrenschmidt | |
64 | 6e270446 | Ben Herrenschmidt | #define SCSI_SENSE_BUF_SIZE 96 |
65 | 6e270446 | Ben Herrenschmidt | #define SRP_RSP_SENSE_DATA_LEN 18 |
66 | 6e270446 | Ben Herrenschmidt | |
67 | 6e270446 | Ben Herrenschmidt | typedef union vscsi_crq { |
68 | 6e270446 | Ben Herrenschmidt | struct viosrp_crq s;
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69 | 6e270446 | Ben Herrenschmidt | uint8_t raw[16];
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70 | 6e270446 | Ben Herrenschmidt | } vscsi_crq; |
71 | 6e270446 | Ben Herrenschmidt | |
72 | 6e270446 | Ben Herrenschmidt | typedef struct vscsi_req { |
73 | 6e270446 | Ben Herrenschmidt | vscsi_crq crq; |
74 | 6e270446 | Ben Herrenschmidt | union viosrp_iu iu;
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75 | 6e270446 | Ben Herrenschmidt | |
76 | 6e270446 | Ben Herrenschmidt | /* SCSI request tracking */
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77 | 6e270446 | Ben Herrenschmidt | SCSIDevice *sdev; |
78 | 5c6c0e51 | Hannes Reinecke | SCSIRequest *sreq; |
79 | 6e270446 | Ben Herrenschmidt | uint32_t qtag; /* qemu tag != srp tag */
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80 | 6e270446 | Ben Herrenschmidt | int lun;
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81 | 6e270446 | Ben Herrenschmidt | int active;
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82 | 6e270446 | Ben Herrenschmidt | long data_len;
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83 | 6e270446 | Ben Herrenschmidt | int writing;
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84 | 6e270446 | Ben Herrenschmidt | int sensing;
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85 | 6e270446 | Ben Herrenschmidt | int senselen;
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86 | 6e270446 | Ben Herrenschmidt | uint8_t sense[SCSI_SENSE_BUF_SIZE]; |
87 | 6e270446 | Ben Herrenschmidt | |
88 | 6e270446 | Ben Herrenschmidt | /* RDMA related bits */
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89 | 6e270446 | Ben Herrenschmidt | uint8_t dma_fmt; |
90 | 6e270446 | Ben Herrenschmidt | struct srp_direct_buf ext_desc;
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91 | 6e270446 | Ben Herrenschmidt | struct srp_direct_buf *cur_desc;
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92 | 6e270446 | Ben Herrenschmidt | struct srp_indirect_buf *ind_desc;
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93 | 6e270446 | Ben Herrenschmidt | int local_desc;
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94 | 6e270446 | Ben Herrenschmidt | int total_desc;
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95 | 6e270446 | Ben Herrenschmidt | } vscsi_req; |
96 | 6e270446 | Ben Herrenschmidt | |
97 | 6e270446 | Ben Herrenschmidt | |
98 | 6e270446 | Ben Herrenschmidt | typedef struct { |
99 | 6e270446 | Ben Herrenschmidt | VIOsPAPRDevice vdev; |
100 | 6e270446 | Ben Herrenschmidt | SCSIBus bus; |
101 | 6e270446 | Ben Herrenschmidt | vscsi_req reqs[VSCSI_REQ_LIMIT]; |
102 | 6e270446 | Ben Herrenschmidt | } VSCSIState; |
103 | 6e270446 | Ben Herrenschmidt | |
104 | 6e270446 | Ben Herrenschmidt | /* XXX Debug only */
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105 | 6e270446 | Ben Herrenschmidt | static VSCSIState *dbg_vscsi_state;
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106 | 6e270446 | Ben Herrenschmidt | |
107 | 6e270446 | Ben Herrenschmidt | |
108 | 6e270446 | Ben Herrenschmidt | static struct vscsi_req *vscsi_get_req(VSCSIState *s) |
109 | 6e270446 | Ben Herrenschmidt | { |
110 | 6e270446 | Ben Herrenschmidt | vscsi_req *req; |
111 | 6e270446 | Ben Herrenschmidt | int i;
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112 | 6e270446 | Ben Herrenschmidt | |
113 | 6e270446 | Ben Herrenschmidt | for (i = 0; i < VSCSI_REQ_LIMIT; i++) { |
114 | 6e270446 | Ben Herrenschmidt | req = &s->reqs[i]; |
115 | 6e270446 | Ben Herrenschmidt | if (!req->active) {
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116 | 6e270446 | Ben Herrenschmidt | memset(req, 0, sizeof(*req)); |
117 | 6e270446 | Ben Herrenschmidt | req->qtag = i; |
118 | 6e270446 | Ben Herrenschmidt | req->active = 1;
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119 | 6e270446 | Ben Herrenschmidt | return req;
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120 | 6e270446 | Ben Herrenschmidt | } |
121 | 6e270446 | Ben Herrenschmidt | } |
122 | 6e270446 | Ben Herrenschmidt | return NULL; |
123 | 6e270446 | Ben Herrenschmidt | } |
124 | 6e270446 | Ben Herrenschmidt | |
125 | 6e270446 | Ben Herrenschmidt | static void vscsi_put_req(VSCSIState *s, vscsi_req *req) |
126 | 6e270446 | Ben Herrenschmidt | { |
127 | 5c6c0e51 | Hannes Reinecke | if (req->sreq != NULL) { |
128 | 5c6c0e51 | Hannes Reinecke | scsi_req_unref(req->sreq); |
129 | 5c6c0e51 | Hannes Reinecke | } |
130 | 5c6c0e51 | Hannes Reinecke | req->sreq = NULL;
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131 | 6e270446 | Ben Herrenschmidt | req->active = 0;
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132 | 6e270446 | Ben Herrenschmidt | } |
133 | 6e270446 | Ben Herrenschmidt | |
134 | 5c6c0e51 | Hannes Reinecke | static vscsi_req *vscsi_find_req(VSCSIState *s, SCSIRequest *req)
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135 | 6e270446 | Ben Herrenschmidt | { |
136 | 5c6c0e51 | Hannes Reinecke | uint32_t tag = req->tag; |
137 | 6e270446 | Ben Herrenschmidt | if (tag >= VSCSI_REQ_LIMIT || !s->reqs[tag].active) {
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138 | 6e270446 | Ben Herrenschmidt | return NULL; |
139 | 6e270446 | Ben Herrenschmidt | } |
140 | 6e270446 | Ben Herrenschmidt | return &s->reqs[tag];
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141 | 6e270446 | Ben Herrenschmidt | } |
142 | 6e270446 | Ben Herrenschmidt | |
143 | 6e270446 | Ben Herrenschmidt | static void vscsi_decode_id_lun(uint64_t srp_lun, int *id, int *lun) |
144 | 6e270446 | Ben Herrenschmidt | { |
145 | 6e270446 | Ben Herrenschmidt | /* XXX Figure that one out properly ! This is crackpot */
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146 | 6e270446 | Ben Herrenschmidt | *id = (srp_lun >> 56) & 0x7f; |
147 | 6e270446 | Ben Herrenschmidt | *lun = (srp_lun >> 48) & 0xff; |
148 | 6e270446 | Ben Herrenschmidt | } |
149 | 6e270446 | Ben Herrenschmidt | |
150 | 6e270446 | Ben Herrenschmidt | static int vscsi_send_iu(VSCSIState *s, vscsi_req *req, |
151 | 6e270446 | Ben Herrenschmidt | uint64_t length, uint8_t format) |
152 | 6e270446 | Ben Herrenschmidt | { |
153 | 6e270446 | Ben Herrenschmidt | long rc, rc1;
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154 | 6e270446 | Ben Herrenschmidt | |
155 | 6e270446 | Ben Herrenschmidt | /* First copy the SRP */
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156 | 6e270446 | Ben Herrenschmidt | rc = spapr_tce_dma_write(&s->vdev, req->crq.s.IU_data_ptr, |
157 | 6e270446 | Ben Herrenschmidt | &req->iu, length); |
158 | 6e270446 | Ben Herrenschmidt | if (rc) {
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159 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "vscsi_send_iu: DMA write failure !\n");
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160 | 6e270446 | Ben Herrenschmidt | } |
161 | 6e270446 | Ben Herrenschmidt | |
162 | 6e270446 | Ben Herrenschmidt | req->crq.s.valid = 0x80;
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163 | 6e270446 | Ben Herrenschmidt | req->crq.s.format = format; |
164 | 6e270446 | Ben Herrenschmidt | req->crq.s.reserved = 0x00;
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165 | 6e270446 | Ben Herrenschmidt | req->crq.s.timeout = cpu_to_be16(0x0000);
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166 | 6e270446 | Ben Herrenschmidt | req->crq.s.IU_length = cpu_to_be16(length); |
167 | 6e270446 | Ben Herrenschmidt | req->crq.s.IU_data_ptr = req->iu.srp.rsp.tag; /* right byte order */
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168 | 6e270446 | Ben Herrenschmidt | |
169 | 6e270446 | Ben Herrenschmidt | if (rc == 0) { |
170 | 6e270446 | Ben Herrenschmidt | req->crq.s.status = 0x99; /* Just needs to be non-zero */ |
171 | 6e270446 | Ben Herrenschmidt | } else {
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172 | 6e270446 | Ben Herrenschmidt | req->crq.s.status = 0x00;
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173 | 6e270446 | Ben Herrenschmidt | } |
174 | 6e270446 | Ben Herrenschmidt | |
175 | 6e270446 | Ben Herrenschmidt | rc1 = spapr_vio_send_crq(&s->vdev, req->crq.raw); |
176 | 6e270446 | Ben Herrenschmidt | if (rc1) {
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177 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "vscsi_send_iu: Error sending response\n");
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178 | 6e270446 | Ben Herrenschmidt | return rc1;
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179 | 6e270446 | Ben Herrenschmidt | } |
180 | 6e270446 | Ben Herrenschmidt | |
181 | 6e270446 | Ben Herrenschmidt | return rc;
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182 | 6e270446 | Ben Herrenschmidt | } |
183 | 6e270446 | Ben Herrenschmidt | |
184 | 6e270446 | Ben Herrenschmidt | static void vscsi_makeup_sense(VSCSIState *s, vscsi_req *req, |
185 | 6e270446 | Ben Herrenschmidt | uint8_t key, uint8_t asc, uint8_t ascq) |
186 | 6e270446 | Ben Herrenschmidt | { |
187 | 6e270446 | Ben Herrenschmidt | req->senselen = SRP_RSP_SENSE_DATA_LEN; |
188 | 6e270446 | Ben Herrenschmidt | |
189 | 6e270446 | Ben Herrenschmidt | /* Valid bit and 'current errors' */
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190 | 6e270446 | Ben Herrenschmidt | req->sense[0] = (0x1 << 7 | 0x70); |
191 | 6e270446 | Ben Herrenschmidt | /* Sense key */
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192 | 6e270446 | Ben Herrenschmidt | req->sense[2] = key;
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193 | 6e270446 | Ben Herrenschmidt | /* Additional sense length */
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194 | 6e270446 | Ben Herrenschmidt | req->sense[7] = 0xa; /* 10 bytes */ |
195 | 6e270446 | Ben Herrenschmidt | /* Additional sense code */
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196 | 6e270446 | Ben Herrenschmidt | req->sense[12] = asc;
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197 | 6e270446 | Ben Herrenschmidt | req->sense[13] = ascq;
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198 | 6e270446 | Ben Herrenschmidt | } |
199 | 6e270446 | Ben Herrenschmidt | |
200 | 6e270446 | Ben Herrenschmidt | static int vscsi_send_rsp(VSCSIState *s, vscsi_req *req, |
201 | 6e270446 | Ben Herrenschmidt | uint8_t status, int32_t res_in, int32_t res_out) |
202 | 6e270446 | Ben Herrenschmidt | { |
203 | 6e270446 | Ben Herrenschmidt | union viosrp_iu *iu = &req->iu;
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204 | 6e270446 | Ben Herrenschmidt | uint64_t tag = iu->srp.rsp.tag; |
205 | 6e270446 | Ben Herrenschmidt | int total_len = sizeof(iu->srp.rsp); |
206 | 6e270446 | Ben Herrenschmidt | |
207 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: Sending resp status: 0x%x, "
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208 | 6e270446 | Ben Herrenschmidt | "res_in: %d, res_out: %d\n", status, res_in, res_out);
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209 | 6e270446 | Ben Herrenschmidt | |
210 | 6e270446 | Ben Herrenschmidt | memset(iu, 0, sizeof(struct srp_rsp)); |
211 | 6e270446 | Ben Herrenschmidt | iu->srp.rsp.opcode = SRP_RSP; |
212 | 6e270446 | Ben Herrenschmidt | iu->srp.rsp.req_lim_delta = cpu_to_be32(1);
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213 | 6e270446 | Ben Herrenschmidt | iu->srp.rsp.tag = tag; |
214 | 6e270446 | Ben Herrenschmidt | |
215 | 6e270446 | Ben Herrenschmidt | /* Handle residuals */
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216 | 6e270446 | Ben Herrenschmidt | if (res_in < 0) { |
217 | 6e270446 | Ben Herrenschmidt | iu->srp.rsp.flags |= SRP_RSP_FLAG_DIUNDER; |
218 | 6e270446 | Ben Herrenschmidt | res_in = -res_in; |
219 | 6e270446 | Ben Herrenschmidt | } else if (res_in) { |
220 | 6e270446 | Ben Herrenschmidt | iu->srp.rsp.flags |= SRP_RSP_FLAG_DIOVER; |
221 | 6e270446 | Ben Herrenschmidt | } |
222 | 6e270446 | Ben Herrenschmidt | if (res_out < 0) { |
223 | 6e270446 | Ben Herrenschmidt | iu->srp.rsp.flags |= SRP_RSP_FLAG_DOUNDER; |
224 | 6e270446 | Ben Herrenschmidt | res_out = -res_out; |
225 | 6e270446 | Ben Herrenschmidt | } else if (res_out) { |
226 | 6e270446 | Ben Herrenschmidt | iu->srp.rsp.flags |= SRP_RSP_FLAG_DOOVER; |
227 | 6e270446 | Ben Herrenschmidt | } |
228 | 6e270446 | Ben Herrenschmidt | iu->srp.rsp.data_in_res_cnt = cpu_to_be32(res_in); |
229 | 6e270446 | Ben Herrenschmidt | iu->srp.rsp.data_out_res_cnt = cpu_to_be32(res_out); |
230 | 6e270446 | Ben Herrenschmidt | |
231 | 6e270446 | Ben Herrenschmidt | /* We don't do response data */
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232 | 6e270446 | Ben Herrenschmidt | /* iu->srp.rsp.flags &= ~SRP_RSP_FLAG_RSPVALID; */
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233 | 6e270446 | Ben Herrenschmidt | iu->srp.rsp.resp_data_len = cpu_to_be32(0);
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234 | 6e270446 | Ben Herrenschmidt | |
235 | 6e270446 | Ben Herrenschmidt | /* Handle success vs. failure */
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236 | 6e270446 | Ben Herrenschmidt | iu->srp.rsp.status = status; |
237 | 6e270446 | Ben Herrenschmidt | if (status) {
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238 | 6e270446 | Ben Herrenschmidt | iu->srp.rsp.sol_not = (iu->srp.cmd.sol_not & 0x04) >> 2; |
239 | 6e270446 | Ben Herrenschmidt | if (req->senselen) {
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240 | 6e270446 | Ben Herrenschmidt | req->iu.srp.rsp.flags |= SRP_RSP_FLAG_SNSVALID; |
241 | 6e270446 | Ben Herrenschmidt | req->iu.srp.rsp.sense_data_len = cpu_to_be32(req->senselen); |
242 | 6e270446 | Ben Herrenschmidt | memcpy(req->iu.srp.rsp.data, req->sense, req->senselen); |
243 | 6e270446 | Ben Herrenschmidt | total_len += req->senselen; |
244 | 6e270446 | Ben Herrenschmidt | } |
245 | 6e270446 | Ben Herrenschmidt | } else {
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246 | 6e270446 | Ben Herrenschmidt | iu->srp.rsp.sol_not = (iu->srp.cmd.sol_not & 0x02) >> 1; |
247 | 6e270446 | Ben Herrenschmidt | } |
248 | 6e270446 | Ben Herrenschmidt | |
249 | 6e270446 | Ben Herrenschmidt | vscsi_send_iu(s, req, total_len, VIOSRP_SRP_FORMAT); |
250 | 6e270446 | Ben Herrenschmidt | return 0; |
251 | 6e270446 | Ben Herrenschmidt | } |
252 | 6e270446 | Ben Herrenschmidt | |
253 | 6e270446 | Ben Herrenschmidt | static inline void vscsi_swap_desc(struct srp_direct_buf *desc) |
254 | 6e270446 | Ben Herrenschmidt | { |
255 | 6e270446 | Ben Herrenschmidt | desc->va = be64_to_cpu(desc->va); |
256 | 6e270446 | Ben Herrenschmidt | desc->len = be32_to_cpu(desc->len); |
257 | 6e270446 | Ben Herrenschmidt | } |
258 | 6e270446 | Ben Herrenschmidt | |
259 | 6e270446 | Ben Herrenschmidt | static int vscsi_srp_direct_data(VSCSIState *s, vscsi_req *req, |
260 | 6e270446 | Ben Herrenschmidt | uint8_t *buf, uint32_t len) |
261 | 6e270446 | Ben Herrenschmidt | { |
262 | 6e270446 | Ben Herrenschmidt | struct srp_direct_buf *md = req->cur_desc;
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263 | 6e270446 | Ben Herrenschmidt | uint32_t llen; |
264 | 8804f57b | Stefan Weil | int rc = 0; |
265 | 6e270446 | Ben Herrenschmidt | |
266 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: direct segment 0x%x bytes, va=0x%llx desc len=0x%x\n",
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267 | 6e270446 | Ben Herrenschmidt | len, (unsigned long long)md->va, md->len); |
268 | 6e270446 | Ben Herrenschmidt | |
269 | 6e270446 | Ben Herrenschmidt | llen = MIN(len, md->len); |
270 | 6e270446 | Ben Herrenschmidt | if (llen) {
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271 | 6e270446 | Ben Herrenschmidt | if (req->writing) { /* writing = to device = reading from memory */ |
272 | 6e270446 | Ben Herrenschmidt | rc = spapr_tce_dma_read(&s->vdev, md->va, buf, llen); |
273 | 6e270446 | Ben Herrenschmidt | } else {
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274 | 6e270446 | Ben Herrenschmidt | rc = spapr_tce_dma_write(&s->vdev, md->va, buf, llen); |
275 | 6e270446 | Ben Herrenschmidt | } |
276 | 6e270446 | Ben Herrenschmidt | } |
277 | 6e270446 | Ben Herrenschmidt | md->len -= llen; |
278 | 6e270446 | Ben Herrenschmidt | md->va += llen; |
279 | 6e270446 | Ben Herrenschmidt | |
280 | 6e270446 | Ben Herrenschmidt | if (rc) {
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281 | 6e270446 | Ben Herrenschmidt | return -1; |
282 | 6e270446 | Ben Herrenschmidt | } |
283 | 6e270446 | Ben Herrenschmidt | return llen;
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284 | 6e270446 | Ben Herrenschmidt | } |
285 | 6e270446 | Ben Herrenschmidt | |
286 | 6e270446 | Ben Herrenschmidt | static int vscsi_srp_indirect_data(VSCSIState *s, vscsi_req *req, |
287 | 6e270446 | Ben Herrenschmidt | uint8_t *buf, uint32_t len) |
288 | 6e270446 | Ben Herrenschmidt | { |
289 | 6e270446 | Ben Herrenschmidt | struct srp_direct_buf *td = &req->ind_desc->table_desc;
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290 | 6e270446 | Ben Herrenschmidt | struct srp_direct_buf *md = req->cur_desc;
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291 | 6e270446 | Ben Herrenschmidt | int rc = 0; |
292 | 6e270446 | Ben Herrenschmidt | uint32_t llen, total = 0;
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293 | 6e270446 | Ben Herrenschmidt | |
294 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: indirect segment 0x%x bytes, td va=0x%llx len=0x%x\n",
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295 | 6e270446 | Ben Herrenschmidt | len, (unsigned long long)td->va, td->len); |
296 | 6e270446 | Ben Herrenschmidt | |
297 | 6e270446 | Ben Herrenschmidt | /* While we have data ... */
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298 | 6e270446 | Ben Herrenschmidt | while (len) {
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299 | 6e270446 | Ben Herrenschmidt | /* If we have a descriptor but it's empty, go fetch a new one */
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300 | 6e270446 | Ben Herrenschmidt | if (md && md->len == 0) { |
301 | 6e270446 | Ben Herrenschmidt | /* More local available, use one */
|
302 | 6e270446 | Ben Herrenschmidt | if (req->local_desc) {
|
303 | 6e270446 | Ben Herrenschmidt | md = ++req->cur_desc; |
304 | 6e270446 | Ben Herrenschmidt | --req->local_desc; |
305 | 6e270446 | Ben Herrenschmidt | --req->total_desc; |
306 | 6e270446 | Ben Herrenschmidt | td->va += sizeof(struct srp_direct_buf); |
307 | 6e270446 | Ben Herrenschmidt | } else {
|
308 | 6e270446 | Ben Herrenschmidt | md = req->cur_desc = NULL;
|
309 | 6e270446 | Ben Herrenschmidt | } |
310 | 6e270446 | Ben Herrenschmidt | } |
311 | 6e270446 | Ben Herrenschmidt | /* No descriptor at hand, fetch one */
|
312 | 6e270446 | Ben Herrenschmidt | if (!md) {
|
313 | 6e270446 | Ben Herrenschmidt | if (!req->total_desc) {
|
314 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: Out of descriptors !\n");
|
315 | 6e270446 | Ben Herrenschmidt | break;
|
316 | 6e270446 | Ben Herrenschmidt | } |
317 | 6e270446 | Ben Herrenschmidt | md = req->cur_desc = &req->ext_desc; |
318 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: Reading desc from 0x%llx\n",
|
319 | 6e270446 | Ben Herrenschmidt | (unsigned long long)td->va); |
320 | 6e270446 | Ben Herrenschmidt | rc = spapr_tce_dma_read(&s->vdev, td->va, md, |
321 | 6e270446 | Ben Herrenschmidt | sizeof(struct srp_direct_buf)); |
322 | 6e270446 | Ben Herrenschmidt | if (rc) {
|
323 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: tce_dma_read -> %d reading ext_desc\n", rc);
|
324 | 6e270446 | Ben Herrenschmidt | break;
|
325 | 6e270446 | Ben Herrenschmidt | } |
326 | 6e270446 | Ben Herrenschmidt | vscsi_swap_desc(md); |
327 | 6e270446 | Ben Herrenschmidt | td->va += sizeof(struct srp_direct_buf); |
328 | 6e270446 | Ben Herrenschmidt | --req->total_desc; |
329 | 6e270446 | Ben Herrenschmidt | } |
330 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: [desc va=0x%llx,len=0x%x] remaining=0x%x\n",
|
331 | 6e270446 | Ben Herrenschmidt | (unsigned long long)md->va, md->len, len); |
332 | 6e270446 | Ben Herrenschmidt | |
333 | 6e270446 | Ben Herrenschmidt | /* Perform transfer */
|
334 | 6e270446 | Ben Herrenschmidt | llen = MIN(len, md->len); |
335 | 6e270446 | Ben Herrenschmidt | if (req->writing) { /* writing = to device = reading from memory */ |
336 | 6e270446 | Ben Herrenschmidt | rc = spapr_tce_dma_read(&s->vdev, md->va, buf, llen); |
337 | 6e270446 | Ben Herrenschmidt | } else {
|
338 | 6e270446 | Ben Herrenschmidt | rc = spapr_tce_dma_write(&s->vdev, md->va, buf, llen); |
339 | 6e270446 | Ben Herrenschmidt | } |
340 | 6e270446 | Ben Herrenschmidt | if (rc) {
|
341 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: tce_dma_r/w(%d) -> %d\n", req->writing, rc);
|
342 | 6e270446 | Ben Herrenschmidt | break;
|
343 | 6e270446 | Ben Herrenschmidt | } |
344 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: data: %02x %02x %02x %02x...\n",
|
345 | 6e270446 | Ben Herrenschmidt | buf[0], buf[1], buf[2], buf[3]); |
346 | 6e270446 | Ben Herrenschmidt | |
347 | 6e270446 | Ben Herrenschmidt | len -= llen; |
348 | 6e270446 | Ben Herrenschmidt | buf += llen; |
349 | 6e270446 | Ben Herrenschmidt | total += llen; |
350 | 6e270446 | Ben Herrenschmidt | md->va += llen; |
351 | 6e270446 | Ben Herrenschmidt | md->len -= llen; |
352 | 6e270446 | Ben Herrenschmidt | } |
353 | 6e270446 | Ben Herrenschmidt | return rc ? -1 : total; |
354 | 6e270446 | Ben Herrenschmidt | } |
355 | 6e270446 | Ben Herrenschmidt | |
356 | 6e270446 | Ben Herrenschmidt | static int vscsi_srp_transfer_data(VSCSIState *s, vscsi_req *req, |
357 | 6e270446 | Ben Herrenschmidt | int writing, uint8_t *buf, uint32_t len)
|
358 | 6e270446 | Ben Herrenschmidt | { |
359 | 6e270446 | Ben Herrenschmidt | int err = 0; |
360 | 6e270446 | Ben Herrenschmidt | |
361 | 6e270446 | Ben Herrenschmidt | switch (req->dma_fmt) {
|
362 | 6e270446 | Ben Herrenschmidt | case SRP_NO_DATA_DESC:
|
363 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: no data desc transfer, skipping 0x%x bytes\n", len);
|
364 | 6e270446 | Ben Herrenschmidt | break;
|
365 | 6e270446 | Ben Herrenschmidt | case SRP_DATA_DESC_DIRECT:
|
366 | 6e270446 | Ben Herrenschmidt | err = vscsi_srp_direct_data(s, req, buf, len); |
367 | 6e270446 | Ben Herrenschmidt | break;
|
368 | 6e270446 | Ben Herrenschmidt | case SRP_DATA_DESC_INDIRECT:
|
369 | 6e270446 | Ben Herrenschmidt | err = vscsi_srp_indirect_data(s, req, buf, len); |
370 | 6e270446 | Ben Herrenschmidt | break;
|
371 | 6e270446 | Ben Herrenschmidt | } |
372 | 6e270446 | Ben Herrenschmidt | return err;
|
373 | 6e270446 | Ben Herrenschmidt | } |
374 | 6e270446 | Ben Herrenschmidt | |
375 | 6e270446 | Ben Herrenschmidt | /* Bits from linux srp */
|
376 | 6e270446 | Ben Herrenschmidt | static int data_out_desc_size(struct srp_cmd *cmd) |
377 | 6e270446 | Ben Herrenschmidt | { |
378 | 6e270446 | Ben Herrenschmidt | int size = 0; |
379 | 6e270446 | Ben Herrenschmidt | uint8_t fmt = cmd->buf_fmt >> 4;
|
380 | 6e270446 | Ben Herrenschmidt | |
381 | 6e270446 | Ben Herrenschmidt | switch (fmt) {
|
382 | 6e270446 | Ben Herrenschmidt | case SRP_NO_DATA_DESC:
|
383 | 6e270446 | Ben Herrenschmidt | break;
|
384 | 6e270446 | Ben Herrenschmidt | case SRP_DATA_DESC_DIRECT:
|
385 | 6e270446 | Ben Herrenschmidt | size = sizeof(struct srp_direct_buf); |
386 | 6e270446 | Ben Herrenschmidt | break;
|
387 | 6e270446 | Ben Herrenschmidt | case SRP_DATA_DESC_INDIRECT:
|
388 | 6e270446 | Ben Herrenschmidt | size = sizeof(struct srp_indirect_buf) + |
389 | 6e270446 | Ben Herrenschmidt | sizeof(struct srp_direct_buf)*cmd->data_out_desc_cnt; |
390 | 6e270446 | Ben Herrenschmidt | break;
|
391 | 6e270446 | Ben Herrenschmidt | default:
|
392 | 6e270446 | Ben Herrenschmidt | break;
|
393 | 6e270446 | Ben Herrenschmidt | } |
394 | 6e270446 | Ben Herrenschmidt | return size;
|
395 | 6e270446 | Ben Herrenschmidt | } |
396 | 6e270446 | Ben Herrenschmidt | |
397 | 6e270446 | Ben Herrenschmidt | static int vscsi_preprocess_desc(vscsi_req *req) |
398 | 6e270446 | Ben Herrenschmidt | { |
399 | 6e270446 | Ben Herrenschmidt | struct srp_cmd *cmd = &req->iu.srp.cmd;
|
400 | 6e270446 | Ben Herrenschmidt | int offset, i;
|
401 | 6e270446 | Ben Herrenschmidt | |
402 | 6e270446 | Ben Herrenschmidt | offset = cmd->add_cdb_len & ~3;
|
403 | 6e270446 | Ben Herrenschmidt | |
404 | 6e270446 | Ben Herrenschmidt | if (req->writing) {
|
405 | 6e270446 | Ben Herrenschmidt | req->dma_fmt = cmd->buf_fmt >> 4;
|
406 | 6e270446 | Ben Herrenschmidt | } else {
|
407 | 6e270446 | Ben Herrenschmidt | offset += data_out_desc_size(cmd); |
408 | 6e270446 | Ben Herrenschmidt | req->dma_fmt = cmd->buf_fmt & ((1U << 4) - 1); |
409 | 6e270446 | Ben Herrenschmidt | } |
410 | 6e270446 | Ben Herrenschmidt | |
411 | 6e270446 | Ben Herrenschmidt | switch (req->dma_fmt) {
|
412 | 6e270446 | Ben Herrenschmidt | case SRP_NO_DATA_DESC:
|
413 | 6e270446 | Ben Herrenschmidt | break;
|
414 | 6e270446 | Ben Herrenschmidt | case SRP_DATA_DESC_DIRECT:
|
415 | 6e270446 | Ben Herrenschmidt | req->cur_desc = (struct srp_direct_buf *)(cmd->add_data + offset);
|
416 | 6e270446 | Ben Herrenschmidt | req->total_desc = req->local_desc = 1;
|
417 | 6e270446 | Ben Herrenschmidt | vscsi_swap_desc(req->cur_desc); |
418 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: using direct RDMA %s, 0x%x bytes MD: 0x%llx\n",
|
419 | 6e270446 | Ben Herrenschmidt | req->writing ? "write" : "read", |
420 | 6e270446 | Ben Herrenschmidt | req->cur_desc->len, (unsigned long long)req->cur_desc->va); |
421 | 6e270446 | Ben Herrenschmidt | break;
|
422 | 6e270446 | Ben Herrenschmidt | case SRP_DATA_DESC_INDIRECT:
|
423 | 6e270446 | Ben Herrenschmidt | req->ind_desc = (struct srp_indirect_buf *)(cmd->add_data + offset);
|
424 | 6e270446 | Ben Herrenschmidt | vscsi_swap_desc(&req->ind_desc->table_desc); |
425 | 6e270446 | Ben Herrenschmidt | req->total_desc = req->ind_desc->table_desc.len / |
426 | 6e270446 | Ben Herrenschmidt | sizeof(struct srp_direct_buf); |
427 | 6e270446 | Ben Herrenschmidt | req->local_desc = req->writing ? cmd->data_out_desc_cnt : |
428 | 6e270446 | Ben Herrenschmidt | cmd->data_in_desc_cnt; |
429 | 6e270446 | Ben Herrenschmidt | for (i = 0; i < req->local_desc; i++) { |
430 | 6e270446 | Ben Herrenschmidt | vscsi_swap_desc(&req->ind_desc->desc_list[i]); |
431 | 6e270446 | Ben Herrenschmidt | } |
432 | 6e270446 | Ben Herrenschmidt | req->cur_desc = req->local_desc ? &req->ind_desc->desc_list[0] : NULL; |
433 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: using indirect RDMA %s, 0x%x bytes %d descs "
|
434 | 6e270446 | Ben Herrenschmidt | "(%d local) VA: 0x%llx\n",
|
435 | 6e270446 | Ben Herrenschmidt | req->writing ? "read" : "write", |
436 | 6e270446 | Ben Herrenschmidt | be32_to_cpu(req->ind_desc->len), |
437 | 6e270446 | Ben Herrenschmidt | req->total_desc, req->local_desc, |
438 | 6e270446 | Ben Herrenschmidt | (unsigned long long)req->ind_desc->table_desc.va); |
439 | 6e270446 | Ben Herrenschmidt | break;
|
440 | 6e270446 | Ben Herrenschmidt | default:
|
441 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, |
442 | 6e270446 | Ben Herrenschmidt | "vscsi_preprocess_desc: Unknown format %x\n", req->dma_fmt);
|
443 | 6e270446 | Ben Herrenschmidt | return -1; |
444 | 6e270446 | Ben Herrenschmidt | } |
445 | 6e270446 | Ben Herrenschmidt | |
446 | 6e270446 | Ben Herrenschmidt | return 0; |
447 | 6e270446 | Ben Herrenschmidt | } |
448 | 6e270446 | Ben Herrenschmidt | |
449 | 6e270446 | Ben Herrenschmidt | static void vscsi_send_request_sense(VSCSIState *s, vscsi_req *req) |
450 | 6e270446 | Ben Herrenschmidt | { |
451 | 6e270446 | Ben Herrenschmidt | SCSIDevice *sdev = req->sdev; |
452 | 6e270446 | Ben Herrenschmidt | uint8_t *cdb = req->iu.srp.cmd.cdb; |
453 | 6e270446 | Ben Herrenschmidt | int n;
|
454 | 6e270446 | Ben Herrenschmidt | |
455 | 6e270446 | Ben Herrenschmidt | cdb[0] = 3; |
456 | 6e270446 | Ben Herrenschmidt | cdb[1] = 0; |
457 | 6e270446 | Ben Herrenschmidt | cdb[2] = 0; |
458 | 6e270446 | Ben Herrenschmidt | cdb[3] = 0; |
459 | 6e270446 | Ben Herrenschmidt | cdb[4] = 96; |
460 | 6e270446 | Ben Herrenschmidt | cdb[5] = 0; |
461 | 6e270446 | Ben Herrenschmidt | req->sensing = 1;
|
462 | fc4f0754 | Paolo Bonzini | n = scsi_req_enqueue(req->sreq, cdb); |
463 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: Queued request sense tag 0x%x\n", req->qtag);
|
464 | 6e270446 | Ben Herrenschmidt | if (n < 0) { |
465 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "VSCSI: REQUEST_SENSE wants write data !?!?!?\n");
|
466 | 6e270446 | Ben Herrenschmidt | vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
467 | 19d110ab | Paolo Bonzini | scsi_req_abort(req->sreq, CHECK_CONDITION); |
468 | 6e270446 | Ben Herrenschmidt | return;
|
469 | 6e270446 | Ben Herrenschmidt | } else if (n == 0) { |
470 | 6e270446 | Ben Herrenschmidt | return;
|
471 | 6e270446 | Ben Herrenschmidt | } |
472 | 5c6c0e51 | Hannes Reinecke | sdev->info->read_data(req->sreq); |
473 | 6e270446 | Ben Herrenschmidt | } |
474 | 6e270446 | Ben Herrenschmidt | |
475 | 6e270446 | Ben Herrenschmidt | /* Callback to indicate that the SCSI layer has completed a transfer. */
|
476 | 5c6c0e51 | Hannes Reinecke | static void vscsi_command_complete(SCSIRequest *sreq, int reason, uint32_t arg) |
477 | 6e270446 | Ben Herrenschmidt | { |
478 | 5c6c0e51 | Hannes Reinecke | VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent); |
479 | 5c6c0e51 | Hannes Reinecke | vscsi_req *req = vscsi_find_req(s, sreq); |
480 | 6e270446 | Ben Herrenschmidt | SCSIDevice *sdev; |
481 | 6e270446 | Ben Herrenschmidt | uint8_t *buf; |
482 | 6e270446 | Ben Herrenschmidt | int32_t res_in = 0, res_out = 0; |
483 | 6e270446 | Ben Herrenschmidt | int len, rc = 0; |
484 | 6e270446 | Ben Herrenschmidt | |
485 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: SCSI cmd complete, r=0x%x tag=0x%x arg=0x%x, req=%p\n",
|
486 | 5c6c0e51 | Hannes Reinecke | reason, sreq->tag, arg, req); |
487 | 6e270446 | Ben Herrenschmidt | if (req == NULL) { |
488 | 5c6c0e51 | Hannes Reinecke | fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", sreq->tag);
|
489 | 6e270446 | Ben Herrenschmidt | return;
|
490 | 6e270446 | Ben Herrenschmidt | } |
491 | 6e270446 | Ben Herrenschmidt | sdev = req->sdev; |
492 | 6e270446 | Ben Herrenschmidt | |
493 | 6e270446 | Ben Herrenschmidt | if (req->sensing) {
|
494 | 6e270446 | Ben Herrenschmidt | if (reason == SCSI_REASON_DONE) {
|
495 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: Sense done !\n");
|
496 | 6e270446 | Ben Herrenschmidt | vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
497 | 6e270446 | Ben Herrenschmidt | vscsi_put_req(s, req); |
498 | 6e270446 | Ben Herrenschmidt | } else {
|
499 | 5c6c0e51 | Hannes Reinecke | uint8_t *buf = sdev->info->get_buf(sreq); |
500 | 6e270446 | Ben Herrenschmidt | |
501 | 6e270446 | Ben Herrenschmidt | len = MIN(arg, SCSI_SENSE_BUF_SIZE); |
502 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: Sense data, %d bytes:\n", len);
|
503 | 6e270446 | Ben Herrenschmidt | dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
|
504 | 6e270446 | Ben Herrenschmidt | buf[0], buf[1], buf[2], buf[3], |
505 | 6e270446 | Ben Herrenschmidt | buf[4], buf[5], buf[6], buf[7]); |
506 | 6e270446 | Ben Herrenschmidt | dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
|
507 | 6e270446 | Ben Herrenschmidt | buf[8], buf[9], buf[10], buf[11], |
508 | 6e270446 | Ben Herrenschmidt | buf[12], buf[13], buf[14], buf[15]); |
509 | 6e270446 | Ben Herrenschmidt | memcpy(req->sense, buf, len); |
510 | 6e270446 | Ben Herrenschmidt | req->senselen = len; |
511 | 5c6c0e51 | Hannes Reinecke | sdev->info->read_data(sreq); |
512 | 6e270446 | Ben Herrenschmidt | } |
513 | 6e270446 | Ben Herrenschmidt | return;
|
514 | 6e270446 | Ben Herrenschmidt | } |
515 | 6e270446 | Ben Herrenschmidt | |
516 | 6e270446 | Ben Herrenschmidt | if (reason == SCSI_REASON_DONE) {
|
517 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: Command complete err=%d\n", arg);
|
518 | 6e270446 | Ben Herrenschmidt | if (arg == 0) { |
519 | 6e270446 | Ben Herrenschmidt | /* We handle overflows, not underflows for normal commands,
|
520 | 6e270446 | Ben Herrenschmidt | * but hopefully nobody cares
|
521 | 6e270446 | Ben Herrenschmidt | */
|
522 | 6e270446 | Ben Herrenschmidt | if (req->writing) {
|
523 | 6e270446 | Ben Herrenschmidt | res_out = req->data_len; |
524 | 6e270446 | Ben Herrenschmidt | } else {
|
525 | 6e270446 | Ben Herrenschmidt | res_in = req->data_len; |
526 | 6e270446 | Ben Herrenschmidt | } |
527 | 6e270446 | Ben Herrenschmidt | vscsi_send_rsp(s, req, 0, res_in, res_out);
|
528 | 6e270446 | Ben Herrenschmidt | } else if (arg == CHECK_CONDITION) { |
529 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: Got CHECK_CONDITION, requesting sense...\n");
|
530 | 6e270446 | Ben Herrenschmidt | vscsi_send_request_sense(s, req); |
531 | 6e270446 | Ben Herrenschmidt | return;
|
532 | 6e270446 | Ben Herrenschmidt | } else {
|
533 | 6e270446 | Ben Herrenschmidt | vscsi_send_rsp(s, req, arg, 0, 0); |
534 | 6e270446 | Ben Herrenschmidt | } |
535 | 6e270446 | Ben Herrenschmidt | vscsi_put_req(s, req); |
536 | 6e270446 | Ben Herrenschmidt | return;
|
537 | 6e270446 | Ben Herrenschmidt | } |
538 | 6e270446 | Ben Herrenschmidt | |
539 | 6e270446 | Ben Herrenschmidt | /* "arg" is how much we have read for reads and how much we want
|
540 | 6e270446 | Ben Herrenschmidt | * to write for writes (ie, how much is to be DMA'd)
|
541 | 6e270446 | Ben Herrenschmidt | */
|
542 | 6e270446 | Ben Herrenschmidt | if (arg) {
|
543 | 5c6c0e51 | Hannes Reinecke | buf = sdev->info->get_buf(sreq); |
544 | 6e270446 | Ben Herrenschmidt | rc = vscsi_srp_transfer_data(s, req, req->writing, buf, arg); |
545 | 6e270446 | Ben Herrenschmidt | } |
546 | 6e270446 | Ben Herrenschmidt | if (rc < 0) { |
547 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "VSCSI: RDMA error rc=%d!\n", rc);
|
548 | 6e270446 | Ben Herrenschmidt | vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
549 | 19d110ab | Paolo Bonzini | scsi_req_abort(req->sreq, CHECK_CONDITION); |
550 | 6e270446 | Ben Herrenschmidt | return;
|
551 | 6e270446 | Ben Herrenschmidt | } |
552 | 6e270446 | Ben Herrenschmidt | |
553 | 6e270446 | Ben Herrenschmidt | /* Start next chunk */
|
554 | 6e270446 | Ben Herrenschmidt | req->data_len -= rc; |
555 | 6e270446 | Ben Herrenschmidt | if (req->writing) {
|
556 | 5c6c0e51 | Hannes Reinecke | sdev->info->write_data(sreq); |
557 | 6e270446 | Ben Herrenschmidt | } else {
|
558 | 5c6c0e51 | Hannes Reinecke | sdev->info->read_data(sreq); |
559 | 6e270446 | Ben Herrenschmidt | } |
560 | 6e270446 | Ben Herrenschmidt | } |
561 | 6e270446 | Ben Herrenschmidt | |
562 | 94d3f98a | Paolo Bonzini | static void vscsi_request_cancelled(SCSIRequest *sreq) |
563 | 94d3f98a | Paolo Bonzini | { |
564 | 94d3f98a | Paolo Bonzini | VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent); |
565 | 94d3f98a | Paolo Bonzini | vscsi_req *req = vscsi_find_req(s, sreq); |
566 | 94d3f98a | Paolo Bonzini | |
567 | 94d3f98a | Paolo Bonzini | vscsi_put_req(s, req); |
568 | 94d3f98a | Paolo Bonzini | } |
569 | 94d3f98a | Paolo Bonzini | |
570 | 6e270446 | Ben Herrenschmidt | static void vscsi_process_login(VSCSIState *s, vscsi_req *req) |
571 | 6e270446 | Ben Herrenschmidt | { |
572 | 6e270446 | Ben Herrenschmidt | union viosrp_iu *iu = &req->iu;
|
573 | 6e270446 | Ben Herrenschmidt | struct srp_login_rsp *rsp = &iu->srp.login_rsp;
|
574 | 6e270446 | Ben Herrenschmidt | uint64_t tag = iu->srp.rsp.tag; |
575 | 6e270446 | Ben Herrenschmidt | |
576 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: Got login, sendin response !\n");
|
577 | 6e270446 | Ben Herrenschmidt | |
578 | 6e270446 | Ben Herrenschmidt | /* TODO handle case that requested size is wrong and
|
579 | 6e270446 | Ben Herrenschmidt | * buffer format is wrong
|
580 | 6e270446 | Ben Herrenschmidt | */
|
581 | 6e270446 | Ben Herrenschmidt | memset(iu, 0, sizeof(struct srp_login_rsp)); |
582 | 6e270446 | Ben Herrenschmidt | rsp->opcode = SRP_LOGIN_RSP; |
583 | 6e270446 | Ben Herrenschmidt | /* Don't advertise quite as many request as we support to
|
584 | 6e270446 | Ben Herrenschmidt | * keep room for management stuff etc...
|
585 | 6e270446 | Ben Herrenschmidt | */
|
586 | 6e270446 | Ben Herrenschmidt | rsp->req_lim_delta = cpu_to_be32(VSCSI_REQ_LIMIT-2);
|
587 | 6e270446 | Ben Herrenschmidt | rsp->tag = tag; |
588 | 6e270446 | Ben Herrenschmidt | rsp->max_it_iu_len = cpu_to_be32(sizeof(union srp_iu)); |
589 | 6e270446 | Ben Herrenschmidt | rsp->max_ti_iu_len = cpu_to_be32(sizeof(union srp_iu)); |
590 | 6e270446 | Ben Herrenschmidt | /* direct and indirect */
|
591 | 6e270446 | Ben Herrenschmidt | rsp->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | SRP_BUF_FORMAT_INDIRECT); |
592 | 6e270446 | Ben Herrenschmidt | |
593 | 6e270446 | Ben Herrenschmidt | vscsi_send_iu(s, req, sizeof(*rsp), VIOSRP_SRP_FORMAT);
|
594 | 6e270446 | Ben Herrenschmidt | } |
595 | 6e270446 | Ben Herrenschmidt | |
596 | 6e270446 | Ben Herrenschmidt | static void vscsi_inquiry_no_target(VSCSIState *s, vscsi_req *req) |
597 | 6e270446 | Ben Herrenschmidt | { |
598 | 6e270446 | Ben Herrenschmidt | uint8_t *cdb = req->iu.srp.cmd.cdb; |
599 | 6e270446 | Ben Herrenschmidt | uint8_t resp_data[36];
|
600 | 6e270446 | Ben Herrenschmidt | int rc, len, alen;
|
601 | 6e270446 | Ben Herrenschmidt | |
602 | 6e270446 | Ben Herrenschmidt | /* We dont do EVPD. Also check that page_code is 0 */
|
603 | 6e270446 | Ben Herrenschmidt | if ((cdb[1] & 0x01) || (cdb[1] & 0x01) || cdb[2] != 0) { |
604 | 6e270446 | Ben Herrenschmidt | /* Send INVALID FIELD IN CDB */
|
605 | 6e270446 | Ben Herrenschmidt | vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0); |
606 | 6e270446 | Ben Herrenschmidt | vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
607 | 6e270446 | Ben Herrenschmidt | return;
|
608 | 6e270446 | Ben Herrenschmidt | } |
609 | 6e270446 | Ben Herrenschmidt | alen = cdb[3];
|
610 | 6e270446 | Ben Herrenschmidt | alen = (alen << 8) | cdb[4]; |
611 | 6e270446 | Ben Herrenschmidt | len = MIN(alen, 36);
|
612 | 6e270446 | Ben Herrenschmidt | |
613 | 6e270446 | Ben Herrenschmidt | /* Fake up inquiry using PQ=3 */
|
614 | 6e270446 | Ben Herrenschmidt | memset(resp_data, 0, 36); |
615 | 6e270446 | Ben Herrenschmidt | resp_data[0] = 0x7f; /* Not capable of supporting a device here */ |
616 | 6e270446 | Ben Herrenschmidt | resp_data[2] = 0x06; /* SPS-4 */ |
617 | 6e270446 | Ben Herrenschmidt | resp_data[3] = 0x02; /* Resp data format */ |
618 | 6e270446 | Ben Herrenschmidt | resp_data[4] = 36 - 5; /* Additional length */ |
619 | 6e270446 | Ben Herrenschmidt | resp_data[7] = 0x10; /* Sync transfers */ |
620 | 6e270446 | Ben Herrenschmidt | memcpy(&resp_data[16], "QEMU EMPTY ", 16); |
621 | 6e270446 | Ben Herrenschmidt | memcpy(&resp_data[8], "QEMU ", 8); |
622 | 6e270446 | Ben Herrenschmidt | |
623 | 6e270446 | Ben Herrenschmidt | req->writing = 0;
|
624 | 6e270446 | Ben Herrenschmidt | vscsi_preprocess_desc(req); |
625 | 6e270446 | Ben Herrenschmidt | rc = vscsi_srp_transfer_data(s, req, 0, resp_data, len);
|
626 | 6e270446 | Ben Herrenschmidt | if (rc < 0) { |
627 | 6e270446 | Ben Herrenschmidt | vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
628 | 6e270446 | Ben Herrenschmidt | vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
629 | 6e270446 | Ben Herrenschmidt | } else {
|
630 | 6e270446 | Ben Herrenschmidt | vscsi_send_rsp(s, req, 0, 36 - rc, 0); |
631 | 6e270446 | Ben Herrenschmidt | } |
632 | 6e270446 | Ben Herrenschmidt | } |
633 | 6e270446 | Ben Herrenschmidt | |
634 | 6e270446 | Ben Herrenschmidt | static int vscsi_queue_cmd(VSCSIState *s, vscsi_req *req) |
635 | 6e270446 | Ben Herrenschmidt | { |
636 | 6e270446 | Ben Herrenschmidt | union srp_iu *srp = &req->iu.srp;
|
637 | 6e270446 | Ben Herrenschmidt | SCSIDevice *sdev; |
638 | 6e270446 | Ben Herrenschmidt | int n, id, lun;
|
639 | 6e270446 | Ben Herrenschmidt | |
640 | 6e270446 | Ben Herrenschmidt | vscsi_decode_id_lun(be64_to_cpu(srp->cmd.lun), &id, &lun); |
641 | 6e270446 | Ben Herrenschmidt | |
642 | 6e270446 | Ben Herrenschmidt | /* Qemu vs. linux issue with LUNs to be sorted out ... */
|
643 | 6e270446 | Ben Herrenschmidt | sdev = (id < 8 && lun < 16) ? s->bus.devs[id] : NULL; |
644 | 6e270446 | Ben Herrenschmidt | if (!sdev) {
|
645 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: Command for id %d with no drive\n", id);
|
646 | 6e270446 | Ben Herrenschmidt | if (srp->cmd.cdb[0] == INQUIRY) { |
647 | 6e270446 | Ben Herrenschmidt | vscsi_inquiry_no_target(s, req); |
648 | 6e270446 | Ben Herrenschmidt | } else {
|
649 | 6e270446 | Ben Herrenschmidt | vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0x00); |
650 | 6e270446 | Ben Herrenschmidt | vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
651 | 6e270446 | Ben Herrenschmidt | } return 1; |
652 | 6e270446 | Ben Herrenschmidt | } |
653 | 6e270446 | Ben Herrenschmidt | |
654 | 6e270446 | Ben Herrenschmidt | req->sdev = sdev; |
655 | 6e270446 | Ben Herrenschmidt | req->lun = lun; |
656 | 43a2b339 | Paolo Bonzini | req->sreq = scsi_req_new(sdev, req->qtag, lun); |
657 | fc4f0754 | Paolo Bonzini | n = scsi_req_enqueue(req->sreq, srp->cmd.cdb); |
658 | 6e270446 | Ben Herrenschmidt | |
659 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: Queued command tag 0x%x CMD 0x%x ID %d LUN %d ret: %d\n",
|
660 | 6e270446 | Ben Herrenschmidt | req->qtag, srp->cmd.cdb[0], id, lun, n);
|
661 | 6e270446 | Ben Herrenschmidt | |
662 | 6e270446 | Ben Herrenschmidt | if (n) {
|
663 | 6e270446 | Ben Herrenschmidt | /* Transfer direction must be set before preprocessing the
|
664 | 6e270446 | Ben Herrenschmidt | * descriptors
|
665 | 6e270446 | Ben Herrenschmidt | */
|
666 | 6e270446 | Ben Herrenschmidt | req->writing = (n < 1);
|
667 | 6e270446 | Ben Herrenschmidt | |
668 | 6e270446 | Ben Herrenschmidt | /* Preprocess RDMA descriptors */
|
669 | 6e270446 | Ben Herrenschmidt | vscsi_preprocess_desc(req); |
670 | 6e270446 | Ben Herrenschmidt | } |
671 | 6e270446 | Ben Herrenschmidt | |
672 | 6e270446 | Ben Herrenschmidt | /* Get transfer direction and initiate transfer */
|
673 | 6e270446 | Ben Herrenschmidt | if (n > 0) { |
674 | 6e270446 | Ben Herrenschmidt | req->data_len = n; |
675 | 5c6c0e51 | Hannes Reinecke | sdev->info->read_data(req->sreq); |
676 | 6e270446 | Ben Herrenschmidt | } else if (n < 0) { |
677 | 6e270446 | Ben Herrenschmidt | req->data_len = -n; |
678 | 5c6c0e51 | Hannes Reinecke | sdev->info->write_data(req->sreq); |
679 | 6e270446 | Ben Herrenschmidt | } |
680 | 6e270446 | Ben Herrenschmidt | /* Don't touch req here, it may have been recycled already */
|
681 | 6e270446 | Ben Herrenschmidt | |
682 | 6e270446 | Ben Herrenschmidt | return 0; |
683 | 6e270446 | Ben Herrenschmidt | } |
684 | 6e270446 | Ben Herrenschmidt | |
685 | 6e270446 | Ben Herrenschmidt | static int vscsi_process_tsk_mgmt(VSCSIState *s, vscsi_req *req) |
686 | 6e270446 | Ben Herrenschmidt | { |
687 | 6e270446 | Ben Herrenschmidt | union viosrp_iu *iu = &req->iu;
|
688 | 6e270446 | Ben Herrenschmidt | int fn;
|
689 | 6e270446 | Ben Herrenschmidt | |
690 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "vscsi_process_tsk_mgmt %02x\n",
|
691 | 6e270446 | Ben Herrenschmidt | iu->srp.tsk_mgmt.tsk_mgmt_func); |
692 | 6e270446 | Ben Herrenschmidt | |
693 | 6e270446 | Ben Herrenschmidt | switch (iu->srp.tsk_mgmt.tsk_mgmt_func) {
|
694 | 6e270446 | Ben Herrenschmidt | #if 0 /* We really don't deal with these for now */
|
695 | 6e270446 | Ben Herrenschmidt | case SRP_TSK_ABORT_TASK:
|
696 | 6e270446 | Ben Herrenschmidt | fn = ABORT_TASK;
|
697 | 6e270446 | Ben Herrenschmidt | break;
|
698 | 6e270446 | Ben Herrenschmidt | case SRP_TSK_ABORT_TASK_SET:
|
699 | 6e270446 | Ben Herrenschmidt | fn = ABORT_TASK_SET;
|
700 | 6e270446 | Ben Herrenschmidt | break;
|
701 | 6e270446 | Ben Herrenschmidt | case SRP_TSK_CLEAR_TASK_SET:
|
702 | 6e270446 | Ben Herrenschmidt | fn = CLEAR_TASK_SET;
|
703 | 6e270446 | Ben Herrenschmidt | break;
|
704 | 6e270446 | Ben Herrenschmidt | case SRP_TSK_LUN_RESET:
|
705 | 6e270446 | Ben Herrenschmidt | fn = LOGICAL_UNIT_RESET;
|
706 | 6e270446 | Ben Herrenschmidt | break;
|
707 | 6e270446 | Ben Herrenschmidt | case SRP_TSK_CLEAR_ACA:
|
708 | 6e270446 | Ben Herrenschmidt | fn = CLEAR_ACA;
|
709 | 6e270446 | Ben Herrenschmidt | break;
|
710 | 6e270446 | Ben Herrenschmidt | #endif
|
711 | 6e270446 | Ben Herrenschmidt | default:
|
712 | 6e270446 | Ben Herrenschmidt | fn = 0;
|
713 | 6e270446 | Ben Herrenschmidt | } |
714 | 6e270446 | Ben Herrenschmidt | if (fn) {
|
715 | 6e270446 | Ben Herrenschmidt | /* XXX Send/Handle target task management */
|
716 | 6e270446 | Ben Herrenschmidt | ; |
717 | 6e270446 | Ben Herrenschmidt | } else {
|
718 | 6e270446 | Ben Herrenschmidt | vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x20, 0); |
719 | 6e270446 | Ben Herrenschmidt | vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
720 | 6e270446 | Ben Herrenschmidt | } |
721 | 6e270446 | Ben Herrenschmidt | return !fn;
|
722 | 6e270446 | Ben Herrenschmidt | } |
723 | 6e270446 | Ben Herrenschmidt | |
724 | 6e270446 | Ben Herrenschmidt | static int vscsi_handle_srp_req(VSCSIState *s, vscsi_req *req) |
725 | 6e270446 | Ben Herrenschmidt | { |
726 | 6e270446 | Ben Herrenschmidt | union srp_iu *srp = &req->iu.srp;
|
727 | 6e270446 | Ben Herrenschmidt | int done = 1; |
728 | 6e270446 | Ben Herrenschmidt | uint8_t opcode = srp->rsp.opcode; |
729 | 6e270446 | Ben Herrenschmidt | |
730 | 6e270446 | Ben Herrenschmidt | switch (opcode) {
|
731 | 6e270446 | Ben Herrenschmidt | case SRP_LOGIN_REQ:
|
732 | 6e270446 | Ben Herrenschmidt | vscsi_process_login(s, req); |
733 | 6e270446 | Ben Herrenschmidt | break;
|
734 | 6e270446 | Ben Herrenschmidt | case SRP_TSK_MGMT:
|
735 | 6e270446 | Ben Herrenschmidt | done = vscsi_process_tsk_mgmt(s, req); |
736 | 6e270446 | Ben Herrenschmidt | break;
|
737 | 6e270446 | Ben Herrenschmidt | case SRP_CMD:
|
738 | 6e270446 | Ben Herrenschmidt | done = vscsi_queue_cmd(s, req); |
739 | 6e270446 | Ben Herrenschmidt | break;
|
740 | 6e270446 | Ben Herrenschmidt | case SRP_LOGIN_RSP:
|
741 | 6e270446 | Ben Herrenschmidt | case SRP_I_LOGOUT:
|
742 | 6e270446 | Ben Herrenschmidt | case SRP_T_LOGOUT:
|
743 | 6e270446 | Ben Herrenschmidt | case SRP_RSP:
|
744 | 6e270446 | Ben Herrenschmidt | case SRP_CRED_REQ:
|
745 | 6e270446 | Ben Herrenschmidt | case SRP_CRED_RSP:
|
746 | 6e270446 | Ben Herrenschmidt | case SRP_AER_REQ:
|
747 | 6e270446 | Ben Herrenschmidt | case SRP_AER_RSP:
|
748 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "VSCSI: Unsupported opcode %02x\n", opcode);
|
749 | 6e270446 | Ben Herrenschmidt | break;
|
750 | 6e270446 | Ben Herrenschmidt | default:
|
751 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "VSCSI: Unknown type %02x\n", opcode);
|
752 | 6e270446 | Ben Herrenschmidt | } |
753 | 6e270446 | Ben Herrenschmidt | |
754 | 6e270446 | Ben Herrenschmidt | return done;
|
755 | 6e270446 | Ben Herrenschmidt | } |
756 | 6e270446 | Ben Herrenschmidt | |
757 | 6e270446 | Ben Herrenschmidt | static int vscsi_send_adapter_info(VSCSIState *s, vscsi_req *req) |
758 | 6e270446 | Ben Herrenschmidt | { |
759 | 6e270446 | Ben Herrenschmidt | struct viosrp_adapter_info *sinfo;
|
760 | 6e270446 | Ben Herrenschmidt | struct mad_adapter_info_data info;
|
761 | 6e270446 | Ben Herrenschmidt | int rc;
|
762 | 6e270446 | Ben Herrenschmidt | |
763 | 6e270446 | Ben Herrenschmidt | sinfo = &req->iu.mad.adapter_info; |
764 | 6e270446 | Ben Herrenschmidt | |
765 | 6e270446 | Ben Herrenschmidt | #if 0 /* What for ? */
|
766 | 6e270446 | Ben Herrenschmidt | rc = spapr_tce_dma_read(&s->vdev, be64_to_cpu(sinfo->buffer),
|
767 | 6e270446 | Ben Herrenschmidt | &info, be16_to_cpu(sinfo->common.length));
|
768 | 6e270446 | Ben Herrenschmidt | if (rc) {
|
769 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "vscsi_send_adapter_info: DMA read failure !\n");
|
770 | 6e270446 | Ben Herrenschmidt | }
|
771 | 6e270446 | Ben Herrenschmidt | #endif
|
772 | 6e270446 | Ben Herrenschmidt | memset(&info, 0, sizeof(info)); |
773 | 6e270446 | Ben Herrenschmidt | strcpy(info.srp_version, SRP_VERSION); |
774 | 6e270446 | Ben Herrenschmidt | strncpy(info.partition_name, "qemu", sizeof("qemu")); |
775 | 6e270446 | Ben Herrenschmidt | info.partition_number = cpu_to_be32(0);
|
776 | 6e270446 | Ben Herrenschmidt | info.mad_version = cpu_to_be32(1);
|
777 | 6e270446 | Ben Herrenschmidt | info.os_type = cpu_to_be32(2);
|
778 | 6e270446 | Ben Herrenschmidt | info.port_max_txu[0] = cpu_to_be32(VSCSI_MAX_SECTORS << 9); |
779 | 6e270446 | Ben Herrenschmidt | |
780 | 6e270446 | Ben Herrenschmidt | rc = spapr_tce_dma_write(&s->vdev, be64_to_cpu(sinfo->buffer), |
781 | 6e270446 | Ben Herrenschmidt | &info, be16_to_cpu(sinfo->common.length)); |
782 | 6e270446 | Ben Herrenschmidt | if (rc) {
|
783 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "vscsi_send_adapter_info: DMA write failure !\n");
|
784 | 6e270446 | Ben Herrenschmidt | } |
785 | 6e270446 | Ben Herrenschmidt | |
786 | 6e270446 | Ben Herrenschmidt | sinfo->common.status = rc ? cpu_to_be32(1) : 0; |
787 | 6e270446 | Ben Herrenschmidt | |
788 | 6e270446 | Ben Herrenschmidt | return vscsi_send_iu(s, req, sizeof(*sinfo), VIOSRP_MAD_FORMAT); |
789 | 6e270446 | Ben Herrenschmidt | } |
790 | 6e270446 | Ben Herrenschmidt | |
791 | 6e270446 | Ben Herrenschmidt | static int vscsi_handle_mad_req(VSCSIState *s, vscsi_req *req) |
792 | 6e270446 | Ben Herrenschmidt | { |
793 | 6e270446 | Ben Herrenschmidt | union mad_iu *mad = &req->iu.mad;
|
794 | 6e270446 | Ben Herrenschmidt | |
795 | 6e270446 | Ben Herrenschmidt | switch (be32_to_cpu(mad->empty_iu.common.type)) {
|
796 | 6e270446 | Ben Herrenschmidt | case VIOSRP_EMPTY_IU_TYPE:
|
797 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "Unsupported EMPTY MAD IU\n");
|
798 | 6e270446 | Ben Herrenschmidt | break;
|
799 | 6e270446 | Ben Herrenschmidt | case VIOSRP_ERROR_LOG_TYPE:
|
800 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "Unsupported ERROR LOG MAD IU\n");
|
801 | 6e270446 | Ben Herrenschmidt | mad->error_log.common.status = cpu_to_be16(1);
|
802 | 6e270446 | Ben Herrenschmidt | vscsi_send_iu(s, req, sizeof(mad->error_log), VIOSRP_MAD_FORMAT);
|
803 | 6e270446 | Ben Herrenschmidt | break;
|
804 | 6e270446 | Ben Herrenschmidt | case VIOSRP_ADAPTER_INFO_TYPE:
|
805 | 6e270446 | Ben Herrenschmidt | vscsi_send_adapter_info(s, req); |
806 | 6e270446 | Ben Herrenschmidt | break;
|
807 | 6e270446 | Ben Herrenschmidt | case VIOSRP_HOST_CONFIG_TYPE:
|
808 | 6e270446 | Ben Herrenschmidt | mad->host_config.common.status = cpu_to_be16(1);
|
809 | 6e270446 | Ben Herrenschmidt | vscsi_send_iu(s, req, sizeof(mad->host_config), VIOSRP_MAD_FORMAT);
|
810 | 6e270446 | Ben Herrenschmidt | break;
|
811 | 6e270446 | Ben Herrenschmidt | default:
|
812 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "VSCSI: Unknown MAD type %02x\n",
|
813 | 6e270446 | Ben Herrenschmidt | be32_to_cpu(mad->empty_iu.common.type)); |
814 | 6e270446 | Ben Herrenschmidt | } |
815 | 6e270446 | Ben Herrenschmidt | |
816 | 6e270446 | Ben Herrenschmidt | return 1; |
817 | 6e270446 | Ben Herrenschmidt | } |
818 | 6e270446 | Ben Herrenschmidt | |
819 | 6e270446 | Ben Herrenschmidt | static void vscsi_got_payload(VSCSIState *s, vscsi_crq *crq) |
820 | 6e270446 | Ben Herrenschmidt | { |
821 | 6e270446 | Ben Herrenschmidt | vscsi_req *req; |
822 | 6e270446 | Ben Herrenschmidt | int done;
|
823 | 6e270446 | Ben Herrenschmidt | |
824 | 6e270446 | Ben Herrenschmidt | req = vscsi_get_req(s); |
825 | 6e270446 | Ben Herrenschmidt | if (req == NULL) { |
826 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "VSCSI: Failed to get a request !\n");
|
827 | 6e270446 | Ben Herrenschmidt | return;
|
828 | 6e270446 | Ben Herrenschmidt | } |
829 | 6e270446 | Ben Herrenschmidt | |
830 | 6e270446 | Ben Herrenschmidt | /* We only support a limited number of descriptors, we know
|
831 | 6e270446 | Ben Herrenschmidt | * the ibmvscsi driver uses up to 10 max, so it should fit
|
832 | 6e270446 | Ben Herrenschmidt | * in our 256 bytes IUs. If not we'll have to increase the size
|
833 | 6e270446 | Ben Herrenschmidt | * of the structure.
|
834 | 6e270446 | Ben Herrenschmidt | */
|
835 | 6e270446 | Ben Herrenschmidt | if (crq->s.IU_length > sizeof(union viosrp_iu)) { |
836 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "VSCSI: SRP IU too long (%d bytes) !\n",
|
837 | 6e270446 | Ben Herrenschmidt | crq->s.IU_length); |
838 | 6e270446 | Ben Herrenschmidt | return;
|
839 | 6e270446 | Ben Herrenschmidt | } |
840 | 6e270446 | Ben Herrenschmidt | |
841 | 6e270446 | Ben Herrenschmidt | /* XXX Handle failure differently ? */
|
842 | 6e270446 | Ben Herrenschmidt | if (spapr_tce_dma_read(&s->vdev, crq->s.IU_data_ptr, &req->iu,
|
843 | 6e270446 | Ben Herrenschmidt | crq->s.IU_length)) { |
844 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "vscsi_got_payload: DMA read failure !\n");
|
845 | 6e270446 | Ben Herrenschmidt | qemu_free(req); |
846 | 6e270446 | Ben Herrenschmidt | } |
847 | 6e270446 | Ben Herrenschmidt | memcpy(&req->crq, crq, sizeof(vscsi_crq));
|
848 | 6e270446 | Ben Herrenschmidt | |
849 | 6e270446 | Ben Herrenschmidt | if (crq->s.format == VIOSRP_MAD_FORMAT) {
|
850 | 6e270446 | Ben Herrenschmidt | done = vscsi_handle_mad_req(s, req); |
851 | 6e270446 | Ben Herrenschmidt | } else {
|
852 | 6e270446 | Ben Herrenschmidt | done = vscsi_handle_srp_req(s, req); |
853 | 6e270446 | Ben Herrenschmidt | } |
854 | 6e270446 | Ben Herrenschmidt | |
855 | 6e270446 | Ben Herrenschmidt | if (done) {
|
856 | 6e270446 | Ben Herrenschmidt | vscsi_put_req(s, req); |
857 | 6e270446 | Ben Herrenschmidt | } |
858 | 6e270446 | Ben Herrenschmidt | } |
859 | 6e270446 | Ben Herrenschmidt | |
860 | 6e270446 | Ben Herrenschmidt | |
861 | 6e270446 | Ben Herrenschmidt | static int vscsi_do_crq(struct VIOsPAPRDevice *dev, uint8_t *crq_data) |
862 | 6e270446 | Ben Herrenschmidt | { |
863 | 6e270446 | Ben Herrenschmidt | VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev); |
864 | 6e270446 | Ben Herrenschmidt | vscsi_crq crq; |
865 | 6e270446 | Ben Herrenschmidt | |
866 | 6e270446 | Ben Herrenschmidt | memcpy(crq.raw, crq_data, 16);
|
867 | 6e270446 | Ben Herrenschmidt | crq.s.timeout = be16_to_cpu(crq.s.timeout); |
868 | 6e270446 | Ben Herrenschmidt | crq.s.IU_length = be16_to_cpu(crq.s.IU_length); |
869 | 6e270446 | Ben Herrenschmidt | crq.s.IU_data_ptr = be64_to_cpu(crq.s.IU_data_ptr); |
870 | 6e270446 | Ben Herrenschmidt | |
871 | 6e270446 | Ben Herrenschmidt | dprintf("VSCSI: do_crq %02x %02x ...\n", crq.raw[0], crq.raw[1]); |
872 | 6e270446 | Ben Herrenschmidt | |
873 | 6e270446 | Ben Herrenschmidt | switch (crq.s.valid) {
|
874 | 6e270446 | Ben Herrenschmidt | case 0xc0: /* Init command/response */ |
875 | 6e270446 | Ben Herrenschmidt | |
876 | 6e270446 | Ben Herrenschmidt | /* Respond to initialization request */
|
877 | 6e270446 | Ben Herrenschmidt | if (crq.s.format == 0x01) { |
878 | 6e270446 | Ben Herrenschmidt | memset(crq.raw, 0, 16); |
879 | 6e270446 | Ben Herrenschmidt | crq.s.valid = 0xc0;
|
880 | 6e270446 | Ben Herrenschmidt | crq.s.format = 0x02;
|
881 | 6e270446 | Ben Herrenschmidt | spapr_vio_send_crq(dev, crq.raw); |
882 | 6e270446 | Ben Herrenschmidt | } |
883 | 6e270446 | Ben Herrenschmidt | |
884 | 6e270446 | Ben Herrenschmidt | /* Note that in hotplug cases, we might get a 0x02
|
885 | 6e270446 | Ben Herrenschmidt | * as a result of us emitting the init request
|
886 | 6e270446 | Ben Herrenschmidt | */
|
887 | 6e270446 | Ben Herrenschmidt | |
888 | 6e270446 | Ben Herrenschmidt | break;
|
889 | 6e270446 | Ben Herrenschmidt | case 0xff: /* Link event */ |
890 | 6e270446 | Ben Herrenschmidt | |
891 | 6e270446 | Ben Herrenschmidt | /* Not handled for now */
|
892 | 6e270446 | Ben Herrenschmidt | |
893 | 6e270446 | Ben Herrenschmidt | break;
|
894 | 6e270446 | Ben Herrenschmidt | case 0x80: /* Payloads */ |
895 | 6e270446 | Ben Herrenschmidt | switch (crq.s.format) {
|
896 | 6e270446 | Ben Herrenschmidt | case VIOSRP_SRP_FORMAT: /* AKA VSCSI request */ |
897 | 6e270446 | Ben Herrenschmidt | case VIOSRP_MAD_FORMAT: /* AKA VSCSI response */ |
898 | 6e270446 | Ben Herrenschmidt | vscsi_got_payload(s, &crq); |
899 | 6e270446 | Ben Herrenschmidt | break;
|
900 | 6e270446 | Ben Herrenschmidt | case VIOSRP_OS400_FORMAT:
|
901 | 6e270446 | Ben Herrenschmidt | case VIOSRP_AIX_FORMAT:
|
902 | 6e270446 | Ben Herrenschmidt | case VIOSRP_LINUX_FORMAT:
|
903 | 6e270446 | Ben Herrenschmidt | case VIOSRP_INLINE_FORMAT:
|
904 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "vscsi_do_srq: Unsupported payload format %02x\n",
|
905 | 6e270446 | Ben Herrenschmidt | crq.s.format); |
906 | 6e270446 | Ben Herrenschmidt | break;
|
907 | 6e270446 | Ben Herrenschmidt | default:
|
908 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "vscsi_do_srq: Unknown payload format %02x\n",
|
909 | 6e270446 | Ben Herrenschmidt | crq.s.format); |
910 | 6e270446 | Ben Herrenschmidt | } |
911 | 6e270446 | Ben Herrenschmidt | break;
|
912 | 6e270446 | Ben Herrenschmidt | default:
|
913 | 6e270446 | Ben Herrenschmidt | fprintf(stderr, "vscsi_do_crq: unknown CRQ %02x %02x ...\n",
|
914 | 6e270446 | Ben Herrenschmidt | crq.raw[0], crq.raw[1]); |
915 | 6e270446 | Ben Herrenschmidt | }; |
916 | 6e270446 | Ben Herrenschmidt | |
917 | 6e270446 | Ben Herrenschmidt | return 0; |
918 | 6e270446 | Ben Herrenschmidt | } |
919 | 6e270446 | Ben Herrenschmidt | |
920 | cfdc1bb0 | Paolo Bonzini | static const struct SCSIBusOps vscsi_scsi_ops = { |
921 | 94d3f98a | Paolo Bonzini | .complete = vscsi_command_complete, |
922 | 94d3f98a | Paolo Bonzini | .cancel = vscsi_request_cancelled |
923 | cfdc1bb0 | Paolo Bonzini | }; |
924 | cfdc1bb0 | Paolo Bonzini | |
925 | 6e270446 | Ben Herrenschmidt | static int spapr_vscsi_init(VIOsPAPRDevice *dev) |
926 | 6e270446 | Ben Herrenschmidt | { |
927 | 6e270446 | Ben Herrenschmidt | VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev); |
928 | 6e270446 | Ben Herrenschmidt | int i;
|
929 | 6e270446 | Ben Herrenschmidt | |
930 | 6e270446 | Ben Herrenschmidt | dbg_vscsi_state = s; |
931 | 6e270446 | Ben Herrenschmidt | |
932 | 6e270446 | Ben Herrenschmidt | /* Initialize qemu request tags */
|
933 | 6e270446 | Ben Herrenschmidt | memset(s->reqs, 0, sizeof(s->reqs)); |
934 | 6e270446 | Ben Herrenschmidt | for (i = 0; i < VSCSI_REQ_LIMIT; i++) { |
935 | 6e270446 | Ben Herrenschmidt | s->reqs[i].qtag = i; |
936 | 6e270446 | Ben Herrenschmidt | } |
937 | 6e270446 | Ben Herrenschmidt | |
938 | 6e270446 | Ben Herrenschmidt | dev->crq.SendFunc = vscsi_do_crq; |
939 | 6e270446 | Ben Herrenschmidt | |
940 | 6e270446 | Ben Herrenschmidt | scsi_bus_new(&s->bus, &dev->qdev, 1, VSCSI_REQ_LIMIT,
|
941 | cfdc1bb0 | Paolo Bonzini | &vscsi_scsi_ops); |
942 | 6e270446 | Ben Herrenschmidt | if (!dev->qdev.hotplugged) {
|
943 | 6e270446 | Ben Herrenschmidt | scsi_bus_legacy_handle_cmdline(&s->bus); |
944 | 6e270446 | Ben Herrenschmidt | } |
945 | 6e270446 | Ben Herrenschmidt | |
946 | 6e270446 | Ben Herrenschmidt | return 0; |
947 | 6e270446 | Ben Herrenschmidt | } |
948 | 6e270446 | Ben Herrenschmidt | |
949 | 6e270446 | Ben Herrenschmidt | void spapr_vscsi_create(VIOsPAPRBus *bus, uint32_t reg,
|
950 | 6e270446 | Ben Herrenschmidt | qemu_irq qirq, uint32_t vio_irq_num) |
951 | 6e270446 | Ben Herrenschmidt | { |
952 | 6e270446 | Ben Herrenschmidt | DeviceState *dev; |
953 | 6e270446 | Ben Herrenschmidt | VIOsPAPRDevice *sdev; |
954 | 6e270446 | Ben Herrenschmidt | |
955 | 6e270446 | Ben Herrenschmidt | dev = qdev_create(&bus->bus, "spapr-vscsi");
|
956 | 6e270446 | Ben Herrenschmidt | qdev_prop_set_uint32(dev, "reg", reg);
|
957 | 6e270446 | Ben Herrenschmidt | |
958 | 6e270446 | Ben Herrenschmidt | qdev_init_nofail(dev); |
959 | 6e270446 | Ben Herrenschmidt | |
960 | 6e270446 | Ben Herrenschmidt | sdev = (VIOsPAPRDevice *)dev; |
961 | 6e270446 | Ben Herrenschmidt | sdev->qirq = qirq; |
962 | 6e270446 | Ben Herrenschmidt | sdev->vio_irq_num = vio_irq_num; |
963 | 6e270446 | Ben Herrenschmidt | } |
964 | 6e270446 | Ben Herrenschmidt | |
965 | 6e270446 | Ben Herrenschmidt | static int spapr_vscsi_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off) |
966 | 6e270446 | Ben Herrenschmidt | { |
967 | 6e270446 | Ben Herrenschmidt | int ret;
|
968 | 6e270446 | Ben Herrenschmidt | |
969 | 6e270446 | Ben Herrenschmidt | ret = fdt_setprop_cell(fdt, node_off, "#address-cells", 2); |
970 | 6e270446 | Ben Herrenschmidt | if (ret < 0) { |
971 | 6e270446 | Ben Herrenschmidt | return ret;
|
972 | 6e270446 | Ben Herrenschmidt | } |
973 | 6e270446 | Ben Herrenschmidt | |
974 | 6e270446 | Ben Herrenschmidt | ret = fdt_setprop_cell(fdt, node_off, "#size-cells", 0); |
975 | 6e270446 | Ben Herrenschmidt | if (ret < 0) { |
976 | 6e270446 | Ben Herrenschmidt | return ret;
|
977 | 6e270446 | Ben Herrenschmidt | } |
978 | 6e270446 | Ben Herrenschmidt | |
979 | 6e270446 | Ben Herrenschmidt | return 0; |
980 | 6e270446 | Ben Herrenschmidt | } |
981 | 6e270446 | Ben Herrenschmidt | |
982 | 6e270446 | Ben Herrenschmidt | static VIOsPAPRDeviceInfo spapr_vscsi = {
|
983 | 6e270446 | Ben Herrenschmidt | .init = spapr_vscsi_init, |
984 | 6e270446 | Ben Herrenschmidt | .devnode = spapr_vscsi_devnode, |
985 | 6e270446 | Ben Herrenschmidt | .dt_name = "v-scsi",
|
986 | 6e270446 | Ben Herrenschmidt | .dt_type = "vscsi",
|
987 | 6e270446 | Ben Herrenschmidt | .dt_compatible = "IBM,v-scsi",
|
988 | 6e270446 | Ben Herrenschmidt | .signal_mask = 0x00000001,
|
989 | 6e270446 | Ben Herrenschmidt | .qdev.name = "spapr-vscsi",
|
990 | 6e270446 | Ben Herrenschmidt | .qdev.size = sizeof(VSCSIState),
|
991 | 6e270446 | Ben Herrenschmidt | .qdev.props = (Property[]) { |
992 | 6e270446 | Ben Herrenschmidt | DEFINE_PROP_UINT32("reg", VIOsPAPRDevice, reg, 0x2000), |
993 | 6e270446 | Ben Herrenschmidt | DEFINE_PROP_UINT32("dma-window", VIOsPAPRDevice,
|
994 | 6e270446 | Ben Herrenschmidt | rtce_window_size, 0x10000000),
|
995 | 6e270446 | Ben Herrenschmidt | DEFINE_PROP_END_OF_LIST(), |
996 | 6e270446 | Ben Herrenschmidt | }, |
997 | 6e270446 | Ben Herrenschmidt | }; |
998 | 6e270446 | Ben Herrenschmidt | |
999 | 6e270446 | Ben Herrenschmidt | static void spapr_vscsi_register(void) |
1000 | 6e270446 | Ben Herrenschmidt | { |
1001 | 6e270446 | Ben Herrenschmidt | spapr_vio_bus_register_withprop(&spapr_vscsi); |
1002 | 6e270446 | Ben Herrenschmidt | } |
1003 | 6e270446 | Ben Herrenschmidt | device_init(spapr_vscsi_register); |