root / hw / spapr_vscsi.c @ 7267c094
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/*
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* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
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*
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* PAPR Virtual SCSI, aka ibmvscsi
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*
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* Copyright (c) 2010,2011 Benjamin Herrenschmidt, IBM Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* TODO:
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*
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* - Cleanups :-)
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* - Sort out better how to assign devices to VSCSI instances
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* - Fix residual counts
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* - Add indirect descriptors support
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* - Maybe do autosense (PAPR seems to mandate it, linux doesn't care)
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*/
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#include "hw.h" |
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#include "scsi.h" |
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#include "scsi-defs.h" |
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#include "net.h" /* Remove that when we can */ |
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#include "srp.h" |
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#include "hw/qdev.h" |
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#include "hw/spapr.h" |
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#include "hw/spapr_vio.h" |
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#include "hw/ppc-viosrp.h" |
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#include <libfdt.h> |
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/*#define DEBUG_VSCSI*/
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#ifdef DEBUG_VSCSI
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#define dprintf(fmt, ...) \
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do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) |
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#else
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#define dprintf(fmt, ...) \
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do { } while (0) |
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#endif
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/*
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* Virtual SCSI device
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*/
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/* Random numbers */
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#define VSCSI_MAX_SECTORS 4096 |
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#define VSCSI_REQ_LIMIT 24 |
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#define SCSI_SENSE_BUF_SIZE 96 |
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#define SRP_RSP_SENSE_DATA_LEN 18 |
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typedef union vscsi_crq { |
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struct viosrp_crq s;
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uint8_t raw[16];
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} vscsi_crq; |
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typedef struct vscsi_req { |
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vscsi_crq crq; |
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union viosrp_iu iu;
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/* SCSI request tracking */
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SCSIRequest *sreq; |
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uint32_t qtag; /* qemu tag != srp tag */
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int lun;
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int active;
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long data_len;
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int writing;
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int senselen;
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uint8_t sense[SCSI_SENSE_BUF_SIZE]; |
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/* RDMA related bits */
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uint8_t dma_fmt; |
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struct srp_direct_buf ext_desc;
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struct srp_direct_buf *cur_desc;
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struct srp_indirect_buf *ind_desc;
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int local_desc;
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int total_desc;
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} vscsi_req; |
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typedef struct { |
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VIOsPAPRDevice vdev; |
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SCSIBus bus; |
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vscsi_req reqs[VSCSI_REQ_LIMIT]; |
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} VSCSIState; |
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/* XXX Debug only */
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static VSCSIState *dbg_vscsi_state;
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static struct vscsi_req *vscsi_get_req(VSCSIState *s) |
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{ |
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vscsi_req *req; |
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int i;
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for (i = 0; i < VSCSI_REQ_LIMIT; i++) { |
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req = &s->reqs[i]; |
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if (!req->active) {
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memset(req, 0, sizeof(*req)); |
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req->qtag = i; |
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req->active = 1;
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return req;
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} |
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} |
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return NULL; |
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} |
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static void vscsi_put_req(vscsi_req *req) |
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{ |
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if (req->sreq != NULL) { |
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scsi_req_unref(req->sreq); |
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} |
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req->sreq = NULL;
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req->active = 0;
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} |
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static void vscsi_decode_id_lun(uint64_t srp_lun, int *id, int *lun) |
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{ |
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/* XXX Figure that one out properly ! This is crackpot */
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*id = (srp_lun >> 56) & 0x7f; |
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*lun = (srp_lun >> 48) & 0xff; |
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} |
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static int vscsi_send_iu(VSCSIState *s, vscsi_req *req, |
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uint64_t length, uint8_t format) |
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{ |
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long rc, rc1;
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/* First copy the SRP */
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rc = spapr_tce_dma_write(&s->vdev, req->crq.s.IU_data_ptr, |
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&req->iu, length); |
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if (rc) {
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fprintf(stderr, "vscsi_send_iu: DMA write failure !\n");
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} |
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req->crq.s.valid = 0x80;
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req->crq.s.format = format; |
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req->crq.s.reserved = 0x00;
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req->crq.s.timeout = cpu_to_be16(0x0000);
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req->crq.s.IU_length = cpu_to_be16(length); |
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req->crq.s.IU_data_ptr = req->iu.srp.rsp.tag; /* right byte order */
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if (rc == 0) { |
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req->crq.s.status = 0x99; /* Just needs to be non-zero */ |
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} else {
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req->crq.s.status = 0x00;
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} |
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rc1 = spapr_vio_send_crq(&s->vdev, req->crq.raw); |
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if (rc1) {
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fprintf(stderr, "vscsi_send_iu: Error sending response\n");
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return rc1;
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} |
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return rc;
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} |
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static void vscsi_makeup_sense(VSCSIState *s, vscsi_req *req, |
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uint8_t key, uint8_t asc, uint8_t ascq) |
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{ |
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req->senselen = SRP_RSP_SENSE_DATA_LEN; |
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/* Valid bit and 'current errors' */
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req->sense[0] = (0x1 << 7 | 0x70); |
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/* Sense key */
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req->sense[2] = key;
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/* Additional sense length */
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req->sense[7] = 0xa; /* 10 bytes */ |
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/* Additional sense code */
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req->sense[12] = asc;
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req->sense[13] = ascq;
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} |
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static int vscsi_send_rsp(VSCSIState *s, vscsi_req *req, |
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uint8_t status, int32_t res_in, int32_t res_out) |
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{ |
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union viosrp_iu *iu = &req->iu;
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uint64_t tag = iu->srp.rsp.tag; |
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int total_len = sizeof(iu->srp.rsp); |
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dprintf("VSCSI: Sending resp status: 0x%x, "
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"res_in: %d, res_out: %d\n", status, res_in, res_out);
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memset(iu, 0, sizeof(struct srp_rsp)); |
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iu->srp.rsp.opcode = SRP_RSP; |
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iu->srp.rsp.req_lim_delta = cpu_to_be32(1);
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iu->srp.rsp.tag = tag; |
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/* Handle residuals */
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if (res_in < 0) { |
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iu->srp.rsp.flags |= SRP_RSP_FLAG_DIUNDER; |
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res_in = -res_in; |
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} else if (res_in) { |
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iu->srp.rsp.flags |= SRP_RSP_FLAG_DIOVER; |
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} |
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if (res_out < 0) { |
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iu->srp.rsp.flags |= SRP_RSP_FLAG_DOUNDER; |
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res_out = -res_out; |
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} else if (res_out) { |
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iu->srp.rsp.flags |= SRP_RSP_FLAG_DOOVER; |
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} |
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iu->srp.rsp.data_in_res_cnt = cpu_to_be32(res_in); |
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iu->srp.rsp.data_out_res_cnt = cpu_to_be32(res_out); |
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/* We don't do response data */
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/* iu->srp.rsp.flags &= ~SRP_RSP_FLAG_RSPVALID; */
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iu->srp.rsp.resp_data_len = cpu_to_be32(0);
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/* Handle success vs. failure */
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iu->srp.rsp.status = status; |
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if (status) {
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iu->srp.rsp.sol_not = (iu->srp.cmd.sol_not & 0x04) >> 2; |
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if (req->senselen) {
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req->iu.srp.rsp.flags |= SRP_RSP_FLAG_SNSVALID; |
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req->iu.srp.rsp.sense_data_len = cpu_to_be32(req->senselen); |
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memcpy(req->iu.srp.rsp.data, req->sense, req->senselen); |
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total_len += req->senselen; |
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} |
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} else {
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iu->srp.rsp.sol_not = (iu->srp.cmd.sol_not & 0x02) >> 1; |
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} |
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vscsi_send_iu(s, req, total_len, VIOSRP_SRP_FORMAT); |
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return 0; |
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} |
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static inline void vscsi_swap_desc(struct srp_direct_buf *desc) |
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{ |
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desc->va = be64_to_cpu(desc->va); |
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desc->len = be32_to_cpu(desc->len); |
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} |
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static int vscsi_srp_direct_data(VSCSIState *s, vscsi_req *req, |
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uint8_t *buf, uint32_t len) |
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{ |
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struct srp_direct_buf *md = req->cur_desc;
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uint32_t llen; |
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int rc = 0; |
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dprintf("VSCSI: direct segment 0x%x bytes, va=0x%llx desc len=0x%x\n",
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len, (unsigned long long)md->va, md->len); |
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llen = MIN(len, md->len); |
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if (llen) {
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if (req->writing) { /* writing = to device = reading from memory */ |
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rc = spapr_tce_dma_read(&s->vdev, md->va, buf, llen); |
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} else {
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rc = spapr_tce_dma_write(&s->vdev, md->va, buf, llen); |
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} |
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} |
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md->len -= llen; |
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md->va += llen; |
268 |
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if (rc) {
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return -1; |
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} |
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return llen;
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} |
274 |
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static int vscsi_srp_indirect_data(VSCSIState *s, vscsi_req *req, |
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uint8_t *buf, uint32_t len) |
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{ |
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struct srp_direct_buf *td = &req->ind_desc->table_desc;
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struct srp_direct_buf *md = req->cur_desc;
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int rc = 0; |
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uint32_t llen, total = 0;
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dprintf("VSCSI: indirect segment 0x%x bytes, td va=0x%llx len=0x%x\n",
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len, (unsigned long long)td->va, td->len); |
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/* While we have data ... */
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while (len) {
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/* If we have a descriptor but it's empty, go fetch a new one */
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if (md && md->len == 0) { |
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/* More local available, use one */
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if (req->local_desc) {
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md = ++req->cur_desc; |
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--req->local_desc; |
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--req->total_desc; |
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td->va += sizeof(struct srp_direct_buf); |
296 |
} else {
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md = req->cur_desc = NULL;
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} |
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} |
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/* No descriptor at hand, fetch one */
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if (!md) {
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if (!req->total_desc) {
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dprintf("VSCSI: Out of descriptors !\n");
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break;
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} |
306 |
md = req->cur_desc = &req->ext_desc; |
307 |
dprintf("VSCSI: Reading desc from 0x%llx\n",
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(unsigned long long)td->va); |
309 |
rc = spapr_tce_dma_read(&s->vdev, td->va, md, |
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sizeof(struct srp_direct_buf)); |
311 |
if (rc) {
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dprintf("VSCSI: tce_dma_read -> %d reading ext_desc\n", rc);
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break;
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314 |
} |
315 |
vscsi_swap_desc(md); |
316 |
td->va += sizeof(struct srp_direct_buf); |
317 |
--req->total_desc; |
318 |
} |
319 |
dprintf("VSCSI: [desc va=0x%llx,len=0x%x] remaining=0x%x\n",
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(unsigned long long)md->va, md->len, len); |
321 |
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/* Perform transfer */
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llen = MIN(len, md->len); |
324 |
if (req->writing) { /* writing = to device = reading from memory */ |
325 |
rc = spapr_tce_dma_read(&s->vdev, md->va, buf, llen); |
326 |
} else {
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327 |
rc = spapr_tce_dma_write(&s->vdev, md->va, buf, llen); |
328 |
} |
329 |
if (rc) {
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330 |
dprintf("VSCSI: tce_dma_r/w(%d) -> %d\n", req->writing, rc);
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break;
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332 |
} |
333 |
dprintf("VSCSI: data: %02x %02x %02x %02x...\n",
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buf[0], buf[1], buf[2], buf[3]); |
335 |
|
336 |
len -= llen; |
337 |
buf += llen; |
338 |
total += llen; |
339 |
md->va += llen; |
340 |
md->len -= llen; |
341 |
} |
342 |
return rc ? -1 : total; |
343 |
} |
344 |
|
345 |
static int vscsi_srp_transfer_data(VSCSIState *s, vscsi_req *req, |
346 |
int writing, uint8_t *buf, uint32_t len)
|
347 |
{ |
348 |
int err = 0; |
349 |
|
350 |
switch (req->dma_fmt) {
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351 |
case SRP_NO_DATA_DESC:
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dprintf("VSCSI: no data desc transfer, skipping 0x%x bytes\n", len);
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353 |
break;
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354 |
case SRP_DATA_DESC_DIRECT:
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355 |
err = vscsi_srp_direct_data(s, req, buf, len); |
356 |
break;
|
357 |
case SRP_DATA_DESC_INDIRECT:
|
358 |
err = vscsi_srp_indirect_data(s, req, buf, len); |
359 |
break;
|
360 |
} |
361 |
return err;
|
362 |
} |
363 |
|
364 |
/* Bits from linux srp */
|
365 |
static int data_out_desc_size(struct srp_cmd *cmd) |
366 |
{ |
367 |
int size = 0; |
368 |
uint8_t fmt = cmd->buf_fmt >> 4;
|
369 |
|
370 |
switch (fmt) {
|
371 |
case SRP_NO_DATA_DESC:
|
372 |
break;
|
373 |
case SRP_DATA_DESC_DIRECT:
|
374 |
size = sizeof(struct srp_direct_buf); |
375 |
break;
|
376 |
case SRP_DATA_DESC_INDIRECT:
|
377 |
size = sizeof(struct srp_indirect_buf) + |
378 |
sizeof(struct srp_direct_buf)*cmd->data_out_desc_cnt; |
379 |
break;
|
380 |
default:
|
381 |
break;
|
382 |
} |
383 |
return size;
|
384 |
} |
385 |
|
386 |
static int vscsi_preprocess_desc(vscsi_req *req) |
387 |
{ |
388 |
struct srp_cmd *cmd = &req->iu.srp.cmd;
|
389 |
int offset, i;
|
390 |
|
391 |
offset = cmd->add_cdb_len & ~3;
|
392 |
|
393 |
if (req->writing) {
|
394 |
req->dma_fmt = cmd->buf_fmt >> 4;
|
395 |
} else {
|
396 |
offset += data_out_desc_size(cmd); |
397 |
req->dma_fmt = cmd->buf_fmt & ((1U << 4) - 1); |
398 |
} |
399 |
|
400 |
switch (req->dma_fmt) {
|
401 |
case SRP_NO_DATA_DESC:
|
402 |
break;
|
403 |
case SRP_DATA_DESC_DIRECT:
|
404 |
req->cur_desc = (struct srp_direct_buf *)(cmd->add_data + offset);
|
405 |
req->total_desc = req->local_desc = 1;
|
406 |
vscsi_swap_desc(req->cur_desc); |
407 |
dprintf("VSCSI: using direct RDMA %s, 0x%x bytes MD: 0x%llx\n",
|
408 |
req->writing ? "write" : "read", |
409 |
req->cur_desc->len, (unsigned long long)req->cur_desc->va); |
410 |
break;
|
411 |
case SRP_DATA_DESC_INDIRECT:
|
412 |
req->ind_desc = (struct srp_indirect_buf *)(cmd->add_data + offset);
|
413 |
vscsi_swap_desc(&req->ind_desc->table_desc); |
414 |
req->total_desc = req->ind_desc->table_desc.len / |
415 |
sizeof(struct srp_direct_buf); |
416 |
req->local_desc = req->writing ? cmd->data_out_desc_cnt : |
417 |
cmd->data_in_desc_cnt; |
418 |
for (i = 0; i < req->local_desc; i++) { |
419 |
vscsi_swap_desc(&req->ind_desc->desc_list[i]); |
420 |
} |
421 |
req->cur_desc = req->local_desc ? &req->ind_desc->desc_list[0] : NULL; |
422 |
dprintf("VSCSI: using indirect RDMA %s, 0x%x bytes %d descs "
|
423 |
"(%d local) VA: 0x%llx\n",
|
424 |
req->writing ? "read" : "write", |
425 |
be32_to_cpu(req->ind_desc->len), |
426 |
req->total_desc, req->local_desc, |
427 |
(unsigned long long)req->ind_desc->table_desc.va); |
428 |
break;
|
429 |
default:
|
430 |
fprintf(stderr, |
431 |
"vscsi_preprocess_desc: Unknown format %x\n", req->dma_fmt);
|
432 |
return -1; |
433 |
} |
434 |
|
435 |
return 0; |
436 |
} |
437 |
|
438 |
/* Callback to indicate that the SCSI layer has completed a transfer. */
|
439 |
static void vscsi_transfer_data(SCSIRequest *sreq, uint32_t len) |
440 |
{ |
441 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent); |
442 |
vscsi_req *req = sreq->hba_private; |
443 |
uint8_t *buf; |
444 |
int rc = 0; |
445 |
|
446 |
dprintf("VSCSI: SCSI xfer complete tag=0x%x len=0x%x, req=%p\n",
|
447 |
sreq->tag, len, req); |
448 |
if (req == NULL) { |
449 |
fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", sreq->tag);
|
450 |
return;
|
451 |
} |
452 |
|
453 |
if (len) {
|
454 |
buf = scsi_req_get_buf(sreq); |
455 |
rc = vscsi_srp_transfer_data(s, req, req->writing, buf, len); |
456 |
} |
457 |
if (rc < 0) { |
458 |
fprintf(stderr, "VSCSI: RDMA error rc=%d!\n", rc);
|
459 |
vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
460 |
scsi_req_abort(req->sreq, CHECK_CONDITION); |
461 |
return;
|
462 |
} |
463 |
|
464 |
/* Start next chunk */
|
465 |
req->data_len -= rc; |
466 |
scsi_req_continue(sreq); |
467 |
} |
468 |
|
469 |
/* Callback to indicate that the SCSI layer has completed a transfer. */
|
470 |
static void vscsi_command_complete(SCSIRequest *sreq, uint32_t status) |
471 |
{ |
472 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent); |
473 |
vscsi_req *req = sreq->hba_private; |
474 |
int32_t res_in = 0, res_out = 0; |
475 |
|
476 |
dprintf("VSCSI: SCSI cmd complete, r=0x%x tag=0x%x status=0x%x, req=%p\n",
|
477 |
reason, sreq->tag, status, req); |
478 |
if (req == NULL) { |
479 |
fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", sreq->tag);
|
480 |
return;
|
481 |
} |
482 |
|
483 |
if (status == CHECK_CONDITION) {
|
484 |
req->senselen = scsi_req_get_sense(req->sreq, req->sense, |
485 |
sizeof(req->sense));
|
486 |
status = 0;
|
487 |
dprintf("VSCSI: Sense data, %d bytes:\n", len);
|
488 |
dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
|
489 |
req->sense[0], req->sense[1], req->sense[2], req->sense[3], |
490 |
req->sense[4], req->sense[5], req->sense[6], req->sense[7]); |
491 |
dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
|
492 |
req->sense[8], req->sense[9], req->sense[10], req->sense[11], |
493 |
req->sense[12], req->sense[13], req->sense[14], req->sense[15]); |
494 |
} |
495 |
|
496 |
dprintf("VSCSI: Command complete err=%d\n", status);
|
497 |
if (status == 0) { |
498 |
/* We handle overflows, not underflows for normal commands,
|
499 |
* but hopefully nobody cares
|
500 |
*/
|
501 |
if (req->writing) {
|
502 |
res_out = req->data_len; |
503 |
} else {
|
504 |
res_in = req->data_len; |
505 |
} |
506 |
} |
507 |
vscsi_send_rsp(s, req, status, res_in, res_out); |
508 |
vscsi_put_req(req); |
509 |
} |
510 |
|
511 |
static void vscsi_request_cancelled(SCSIRequest *sreq) |
512 |
{ |
513 |
vscsi_req *req = sreq->hba_private; |
514 |
|
515 |
vscsi_put_req(req); |
516 |
} |
517 |
|
518 |
static void vscsi_process_login(VSCSIState *s, vscsi_req *req) |
519 |
{ |
520 |
union viosrp_iu *iu = &req->iu;
|
521 |
struct srp_login_rsp *rsp = &iu->srp.login_rsp;
|
522 |
uint64_t tag = iu->srp.rsp.tag; |
523 |
|
524 |
dprintf("VSCSI: Got login, sendin response !\n");
|
525 |
|
526 |
/* TODO handle case that requested size is wrong and
|
527 |
* buffer format is wrong
|
528 |
*/
|
529 |
memset(iu, 0, sizeof(struct srp_login_rsp)); |
530 |
rsp->opcode = SRP_LOGIN_RSP; |
531 |
/* Don't advertise quite as many request as we support to
|
532 |
* keep room for management stuff etc...
|
533 |
*/
|
534 |
rsp->req_lim_delta = cpu_to_be32(VSCSI_REQ_LIMIT-2);
|
535 |
rsp->tag = tag; |
536 |
rsp->max_it_iu_len = cpu_to_be32(sizeof(union srp_iu)); |
537 |
rsp->max_ti_iu_len = cpu_to_be32(sizeof(union srp_iu)); |
538 |
/* direct and indirect */
|
539 |
rsp->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | SRP_BUF_FORMAT_INDIRECT); |
540 |
|
541 |
vscsi_send_iu(s, req, sizeof(*rsp), VIOSRP_SRP_FORMAT);
|
542 |
} |
543 |
|
544 |
static void vscsi_inquiry_no_target(VSCSIState *s, vscsi_req *req) |
545 |
{ |
546 |
uint8_t *cdb = req->iu.srp.cmd.cdb; |
547 |
uint8_t resp_data[36];
|
548 |
int rc, len, alen;
|
549 |
|
550 |
/* We dont do EVPD. Also check that page_code is 0 */
|
551 |
if ((cdb[1] & 0x01) || (cdb[1] & 0x01) || cdb[2] != 0) { |
552 |
/* Send INVALID FIELD IN CDB */
|
553 |
vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0); |
554 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
555 |
return;
|
556 |
} |
557 |
alen = cdb[3];
|
558 |
alen = (alen << 8) | cdb[4]; |
559 |
len = MIN(alen, 36);
|
560 |
|
561 |
/* Fake up inquiry using PQ=3 */
|
562 |
memset(resp_data, 0, 36); |
563 |
resp_data[0] = 0x7f; /* Not capable of supporting a device here */ |
564 |
resp_data[2] = 0x06; /* SPS-4 */ |
565 |
resp_data[3] = 0x02; /* Resp data format */ |
566 |
resp_data[4] = 36 - 5; /* Additional length */ |
567 |
resp_data[7] = 0x10; /* Sync transfers */ |
568 |
memcpy(&resp_data[16], "QEMU EMPTY ", 16); |
569 |
memcpy(&resp_data[8], "QEMU ", 8); |
570 |
|
571 |
req->writing = 0;
|
572 |
vscsi_preprocess_desc(req); |
573 |
rc = vscsi_srp_transfer_data(s, req, 0, resp_data, len);
|
574 |
if (rc < 0) { |
575 |
vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
576 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
577 |
} else {
|
578 |
vscsi_send_rsp(s, req, 0, 36 - rc, 0); |
579 |
} |
580 |
} |
581 |
|
582 |
static int vscsi_queue_cmd(VSCSIState *s, vscsi_req *req) |
583 |
{ |
584 |
union srp_iu *srp = &req->iu.srp;
|
585 |
SCSIDevice *sdev; |
586 |
int n, id, lun;
|
587 |
|
588 |
vscsi_decode_id_lun(be64_to_cpu(srp->cmd.lun), &id, &lun); |
589 |
|
590 |
/* Qemu vs. linux issue with LUNs to be sorted out ... */
|
591 |
sdev = (id < 8 && lun < 16) ? s->bus.devs[id] : NULL; |
592 |
if (!sdev) {
|
593 |
dprintf("VSCSI: Command for id %d with no drive\n", id);
|
594 |
if (srp->cmd.cdb[0] == INQUIRY) { |
595 |
vscsi_inquiry_no_target(s, req); |
596 |
} else {
|
597 |
vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0x00); |
598 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
599 |
} return 1; |
600 |
} |
601 |
|
602 |
req->lun = lun; |
603 |
req->sreq = scsi_req_new(sdev, req->qtag, lun, srp->cmd.cdb, req); |
604 |
n = scsi_req_enqueue(req->sreq); |
605 |
|
606 |
dprintf("VSCSI: Queued command tag 0x%x CMD 0x%x ID %d LUN %d ret: %d\n",
|
607 |
req->qtag, srp->cmd.cdb[0], id, lun, n);
|
608 |
|
609 |
if (n) {
|
610 |
/* Transfer direction must be set before preprocessing the
|
611 |
* descriptors
|
612 |
*/
|
613 |
req->writing = (n < 1);
|
614 |
|
615 |
/* Preprocess RDMA descriptors */
|
616 |
vscsi_preprocess_desc(req); |
617 |
|
618 |
/* Get transfer direction and initiate transfer */
|
619 |
if (n > 0) { |
620 |
req->data_len = n; |
621 |
} else if (n < 0) { |
622 |
req->data_len = -n; |
623 |
} |
624 |
scsi_req_continue(req->sreq); |
625 |
} |
626 |
/* Don't touch req here, it may have been recycled already */
|
627 |
|
628 |
return 0; |
629 |
} |
630 |
|
631 |
static int vscsi_process_tsk_mgmt(VSCSIState *s, vscsi_req *req) |
632 |
{ |
633 |
union viosrp_iu *iu = &req->iu;
|
634 |
int fn;
|
635 |
|
636 |
fprintf(stderr, "vscsi_process_tsk_mgmt %02x\n",
|
637 |
iu->srp.tsk_mgmt.tsk_mgmt_func); |
638 |
|
639 |
switch (iu->srp.tsk_mgmt.tsk_mgmt_func) {
|
640 |
#if 0 /* We really don't deal with these for now */
|
641 |
case SRP_TSK_ABORT_TASK:
|
642 |
fn = ABORT_TASK;
|
643 |
break;
|
644 |
case SRP_TSK_ABORT_TASK_SET:
|
645 |
fn = ABORT_TASK_SET;
|
646 |
break;
|
647 |
case SRP_TSK_CLEAR_TASK_SET:
|
648 |
fn = CLEAR_TASK_SET;
|
649 |
break;
|
650 |
case SRP_TSK_LUN_RESET:
|
651 |
fn = LOGICAL_UNIT_RESET;
|
652 |
break;
|
653 |
case SRP_TSK_CLEAR_ACA:
|
654 |
fn = CLEAR_ACA;
|
655 |
break;
|
656 |
#endif
|
657 |
default:
|
658 |
fn = 0;
|
659 |
} |
660 |
if (fn) {
|
661 |
/* XXX Send/Handle target task management */
|
662 |
; |
663 |
} else {
|
664 |
vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x20, 0); |
665 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
666 |
} |
667 |
return !fn;
|
668 |
} |
669 |
|
670 |
static int vscsi_handle_srp_req(VSCSIState *s, vscsi_req *req) |
671 |
{ |
672 |
union srp_iu *srp = &req->iu.srp;
|
673 |
int done = 1; |
674 |
uint8_t opcode = srp->rsp.opcode; |
675 |
|
676 |
switch (opcode) {
|
677 |
case SRP_LOGIN_REQ:
|
678 |
vscsi_process_login(s, req); |
679 |
break;
|
680 |
case SRP_TSK_MGMT:
|
681 |
done = vscsi_process_tsk_mgmt(s, req); |
682 |
break;
|
683 |
case SRP_CMD:
|
684 |
done = vscsi_queue_cmd(s, req); |
685 |
break;
|
686 |
case SRP_LOGIN_RSP:
|
687 |
case SRP_I_LOGOUT:
|
688 |
case SRP_T_LOGOUT:
|
689 |
case SRP_RSP:
|
690 |
case SRP_CRED_REQ:
|
691 |
case SRP_CRED_RSP:
|
692 |
case SRP_AER_REQ:
|
693 |
case SRP_AER_RSP:
|
694 |
fprintf(stderr, "VSCSI: Unsupported opcode %02x\n", opcode);
|
695 |
break;
|
696 |
default:
|
697 |
fprintf(stderr, "VSCSI: Unknown type %02x\n", opcode);
|
698 |
} |
699 |
|
700 |
return done;
|
701 |
} |
702 |
|
703 |
static int vscsi_send_adapter_info(VSCSIState *s, vscsi_req *req) |
704 |
{ |
705 |
struct viosrp_adapter_info *sinfo;
|
706 |
struct mad_adapter_info_data info;
|
707 |
int rc;
|
708 |
|
709 |
sinfo = &req->iu.mad.adapter_info; |
710 |
|
711 |
#if 0 /* What for ? */
|
712 |
rc = spapr_tce_dma_read(&s->vdev, be64_to_cpu(sinfo->buffer),
|
713 |
&info, be16_to_cpu(sinfo->common.length));
|
714 |
if (rc) {
|
715 |
fprintf(stderr, "vscsi_send_adapter_info: DMA read failure !\n");
|
716 |
}
|
717 |
#endif
|
718 |
memset(&info, 0, sizeof(info)); |
719 |
strcpy(info.srp_version, SRP_VERSION); |
720 |
strncpy(info.partition_name, "qemu", sizeof("qemu")); |
721 |
info.partition_number = cpu_to_be32(0);
|
722 |
info.mad_version = cpu_to_be32(1);
|
723 |
info.os_type = cpu_to_be32(2);
|
724 |
info.port_max_txu[0] = cpu_to_be32(VSCSI_MAX_SECTORS << 9); |
725 |
|
726 |
rc = spapr_tce_dma_write(&s->vdev, be64_to_cpu(sinfo->buffer), |
727 |
&info, be16_to_cpu(sinfo->common.length)); |
728 |
if (rc) {
|
729 |
fprintf(stderr, "vscsi_send_adapter_info: DMA write failure !\n");
|
730 |
} |
731 |
|
732 |
sinfo->common.status = rc ? cpu_to_be32(1) : 0; |
733 |
|
734 |
return vscsi_send_iu(s, req, sizeof(*sinfo), VIOSRP_MAD_FORMAT); |
735 |
} |
736 |
|
737 |
static int vscsi_handle_mad_req(VSCSIState *s, vscsi_req *req) |
738 |
{ |
739 |
union mad_iu *mad = &req->iu.mad;
|
740 |
|
741 |
switch (be32_to_cpu(mad->empty_iu.common.type)) {
|
742 |
case VIOSRP_EMPTY_IU_TYPE:
|
743 |
fprintf(stderr, "Unsupported EMPTY MAD IU\n");
|
744 |
break;
|
745 |
case VIOSRP_ERROR_LOG_TYPE:
|
746 |
fprintf(stderr, "Unsupported ERROR LOG MAD IU\n");
|
747 |
mad->error_log.common.status = cpu_to_be16(1);
|
748 |
vscsi_send_iu(s, req, sizeof(mad->error_log), VIOSRP_MAD_FORMAT);
|
749 |
break;
|
750 |
case VIOSRP_ADAPTER_INFO_TYPE:
|
751 |
vscsi_send_adapter_info(s, req); |
752 |
break;
|
753 |
case VIOSRP_HOST_CONFIG_TYPE:
|
754 |
mad->host_config.common.status = cpu_to_be16(1);
|
755 |
vscsi_send_iu(s, req, sizeof(mad->host_config), VIOSRP_MAD_FORMAT);
|
756 |
break;
|
757 |
default:
|
758 |
fprintf(stderr, "VSCSI: Unknown MAD type %02x\n",
|
759 |
be32_to_cpu(mad->empty_iu.common.type)); |
760 |
} |
761 |
|
762 |
return 1; |
763 |
} |
764 |
|
765 |
static void vscsi_got_payload(VSCSIState *s, vscsi_crq *crq) |
766 |
{ |
767 |
vscsi_req *req; |
768 |
int done;
|
769 |
|
770 |
req = vscsi_get_req(s); |
771 |
if (req == NULL) { |
772 |
fprintf(stderr, "VSCSI: Failed to get a request !\n");
|
773 |
return;
|
774 |
} |
775 |
|
776 |
/* We only support a limited number of descriptors, we know
|
777 |
* the ibmvscsi driver uses up to 10 max, so it should fit
|
778 |
* in our 256 bytes IUs. If not we'll have to increase the size
|
779 |
* of the structure.
|
780 |
*/
|
781 |
if (crq->s.IU_length > sizeof(union viosrp_iu)) { |
782 |
fprintf(stderr, "VSCSI: SRP IU too long (%d bytes) !\n",
|
783 |
crq->s.IU_length); |
784 |
return;
|
785 |
} |
786 |
|
787 |
/* XXX Handle failure differently ? */
|
788 |
if (spapr_tce_dma_read(&s->vdev, crq->s.IU_data_ptr, &req->iu,
|
789 |
crq->s.IU_length)) { |
790 |
fprintf(stderr, "vscsi_got_payload: DMA read failure !\n");
|
791 |
g_free(req); |
792 |
} |
793 |
memcpy(&req->crq, crq, sizeof(vscsi_crq));
|
794 |
|
795 |
if (crq->s.format == VIOSRP_MAD_FORMAT) {
|
796 |
done = vscsi_handle_mad_req(s, req); |
797 |
} else {
|
798 |
done = vscsi_handle_srp_req(s, req); |
799 |
} |
800 |
|
801 |
if (done) {
|
802 |
vscsi_put_req(req); |
803 |
} |
804 |
} |
805 |
|
806 |
|
807 |
static int vscsi_do_crq(struct VIOsPAPRDevice *dev, uint8_t *crq_data) |
808 |
{ |
809 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev); |
810 |
vscsi_crq crq; |
811 |
|
812 |
memcpy(crq.raw, crq_data, 16);
|
813 |
crq.s.timeout = be16_to_cpu(crq.s.timeout); |
814 |
crq.s.IU_length = be16_to_cpu(crq.s.IU_length); |
815 |
crq.s.IU_data_ptr = be64_to_cpu(crq.s.IU_data_ptr); |
816 |
|
817 |
dprintf("VSCSI: do_crq %02x %02x ...\n", crq.raw[0], crq.raw[1]); |
818 |
|
819 |
switch (crq.s.valid) {
|
820 |
case 0xc0: /* Init command/response */ |
821 |
|
822 |
/* Respond to initialization request */
|
823 |
if (crq.s.format == 0x01) { |
824 |
memset(crq.raw, 0, 16); |
825 |
crq.s.valid = 0xc0;
|
826 |
crq.s.format = 0x02;
|
827 |
spapr_vio_send_crq(dev, crq.raw); |
828 |
} |
829 |
|
830 |
/* Note that in hotplug cases, we might get a 0x02
|
831 |
* as a result of us emitting the init request
|
832 |
*/
|
833 |
|
834 |
break;
|
835 |
case 0xff: /* Link event */ |
836 |
|
837 |
/* Not handled for now */
|
838 |
|
839 |
break;
|
840 |
case 0x80: /* Payloads */ |
841 |
switch (crq.s.format) {
|
842 |
case VIOSRP_SRP_FORMAT: /* AKA VSCSI request */ |
843 |
case VIOSRP_MAD_FORMAT: /* AKA VSCSI response */ |
844 |
vscsi_got_payload(s, &crq); |
845 |
break;
|
846 |
case VIOSRP_OS400_FORMAT:
|
847 |
case VIOSRP_AIX_FORMAT:
|
848 |
case VIOSRP_LINUX_FORMAT:
|
849 |
case VIOSRP_INLINE_FORMAT:
|
850 |
fprintf(stderr, "vscsi_do_srq: Unsupported payload format %02x\n",
|
851 |
crq.s.format); |
852 |
break;
|
853 |
default:
|
854 |
fprintf(stderr, "vscsi_do_srq: Unknown payload format %02x\n",
|
855 |
crq.s.format); |
856 |
} |
857 |
break;
|
858 |
default:
|
859 |
fprintf(stderr, "vscsi_do_crq: unknown CRQ %02x %02x ...\n",
|
860 |
crq.raw[0], crq.raw[1]); |
861 |
}; |
862 |
|
863 |
return 0; |
864 |
} |
865 |
|
866 |
static const struct SCSIBusOps vscsi_scsi_ops = { |
867 |
.transfer_data = vscsi_transfer_data, |
868 |
.complete = vscsi_command_complete, |
869 |
.cancel = vscsi_request_cancelled |
870 |
}; |
871 |
|
872 |
static int spapr_vscsi_init(VIOsPAPRDevice *dev) |
873 |
{ |
874 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev); |
875 |
int i;
|
876 |
|
877 |
dbg_vscsi_state = s; |
878 |
|
879 |
/* Initialize qemu request tags */
|
880 |
memset(s->reqs, 0, sizeof(s->reqs)); |
881 |
for (i = 0; i < VSCSI_REQ_LIMIT; i++) { |
882 |
s->reqs[i].qtag = i; |
883 |
} |
884 |
|
885 |
dev->crq.SendFunc = vscsi_do_crq; |
886 |
|
887 |
scsi_bus_new(&s->bus, &dev->qdev, 1, VSCSI_REQ_LIMIT,
|
888 |
&vscsi_scsi_ops); |
889 |
if (!dev->qdev.hotplugged) {
|
890 |
scsi_bus_legacy_handle_cmdline(&s->bus); |
891 |
} |
892 |
|
893 |
return 0; |
894 |
} |
895 |
|
896 |
void spapr_vscsi_create(VIOsPAPRBus *bus, uint32_t reg,
|
897 |
qemu_irq qirq, uint32_t vio_irq_num) |
898 |
{ |
899 |
DeviceState *dev; |
900 |
VIOsPAPRDevice *sdev; |
901 |
|
902 |
dev = qdev_create(&bus->bus, "spapr-vscsi");
|
903 |
qdev_prop_set_uint32(dev, "reg", reg);
|
904 |
|
905 |
qdev_init_nofail(dev); |
906 |
|
907 |
sdev = (VIOsPAPRDevice *)dev; |
908 |
sdev->qirq = qirq; |
909 |
sdev->vio_irq_num = vio_irq_num; |
910 |
} |
911 |
|
912 |
static int spapr_vscsi_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off) |
913 |
{ |
914 |
int ret;
|
915 |
|
916 |
ret = fdt_setprop_cell(fdt, node_off, "#address-cells", 2); |
917 |
if (ret < 0) { |
918 |
return ret;
|
919 |
} |
920 |
|
921 |
ret = fdt_setprop_cell(fdt, node_off, "#size-cells", 0); |
922 |
if (ret < 0) { |
923 |
return ret;
|
924 |
} |
925 |
|
926 |
return 0; |
927 |
} |
928 |
|
929 |
static VIOsPAPRDeviceInfo spapr_vscsi = {
|
930 |
.init = spapr_vscsi_init, |
931 |
.devnode = spapr_vscsi_devnode, |
932 |
.dt_name = "v-scsi",
|
933 |
.dt_type = "vscsi",
|
934 |
.dt_compatible = "IBM,v-scsi",
|
935 |
.signal_mask = 0x00000001,
|
936 |
.qdev.name = "spapr-vscsi",
|
937 |
.qdev.size = sizeof(VSCSIState),
|
938 |
.qdev.props = (Property[]) { |
939 |
DEFINE_PROP_UINT32("reg", VIOsPAPRDevice, reg, 0x2000), |
940 |
DEFINE_PROP_UINT32("dma-window", VIOsPAPRDevice,
|
941 |
rtce_window_size, 0x10000000),
|
942 |
DEFINE_PROP_END_OF_LIST(), |
943 |
}, |
944 |
}; |
945 |
|
946 |
static void spapr_vscsi_register(void) |
947 |
{ |
948 |
spapr_vio_bus_register_withprop(&spapr_vscsi); |
949 |
} |
950 |
device_init(spapr_vscsi_register); |