root / hw / spapr_vscsi.c @ 4b71051e
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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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SCSIDevice *sdev; |
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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 sensing;
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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(VSCSIState *s, vscsi_req *req) |
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{ |
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req->active = 0;
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} |
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static vscsi_req *vscsi_find_req(VSCSIState *s, uint32_t tag)
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{ |
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if (tag >= VSCSI_REQ_LIMIT || !s->reqs[tag].active) {
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return NULL; |
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} |
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return &s->reqs[tag];
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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; |
273 |
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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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} |
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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); |
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} 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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} |
311 |
md = req->cur_desc = &req->ext_desc; |
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dprintf("VSCSI: Reading desc from 0x%llx\n",
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(unsigned long long)td->va); |
314 |
rc = spapr_tce_dma_read(&s->vdev, td->va, md, |
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sizeof(struct srp_direct_buf)); |
316 |
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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} |
320 |
vscsi_swap_desc(md); |
321 |
td->va += sizeof(struct srp_direct_buf); |
322 |
--req->total_desc; |
323 |
} |
324 |
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); |
326 |
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327 |
/* Perform transfer */
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328 |
llen = MIN(len, md->len); |
329 |
if (req->writing) { /* writing = to device = reading from memory */ |
330 |
rc = spapr_tce_dma_read(&s->vdev, md->va, buf, llen); |
331 |
} else {
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rc = spapr_tce_dma_write(&s->vdev, md->va, buf, llen); |
333 |
} |
334 |
if (rc) {
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dprintf("VSCSI: tce_dma_r/w(%d) -> %d\n", req->writing, rc);
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break;
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337 |
} |
338 |
dprintf("VSCSI: data: %02x %02x %02x %02x...\n",
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buf[0], buf[1], buf[2], buf[3]); |
340 |
|
341 |
len -= llen; |
342 |
buf += llen; |
343 |
total += llen; |
344 |
md->va += llen; |
345 |
md->len -= llen; |
346 |
} |
347 |
return rc ? -1 : total; |
348 |
} |
349 |
|
350 |
static int vscsi_srp_transfer_data(VSCSIState *s, vscsi_req *req, |
351 |
int writing, uint8_t *buf, uint32_t len)
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{ |
353 |
int err = 0; |
354 |
|
355 |
switch (req->dma_fmt) {
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356 |
case SRP_NO_DATA_DESC:
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357 |
dprintf("VSCSI: no data desc transfer, skipping 0x%x bytes\n", len);
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358 |
break;
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359 |
case SRP_DATA_DESC_DIRECT:
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360 |
err = vscsi_srp_direct_data(s, req, buf, len); |
361 |
break;
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362 |
case SRP_DATA_DESC_INDIRECT:
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363 |
err = vscsi_srp_indirect_data(s, req, buf, len); |
364 |
break;
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365 |
} |
366 |
return err;
|
367 |
} |
368 |
|
369 |
/* Bits from linux srp */
|
370 |
static int data_out_desc_size(struct srp_cmd *cmd) |
371 |
{ |
372 |
int size = 0; |
373 |
uint8_t fmt = cmd->buf_fmt >> 4;
|
374 |
|
375 |
switch (fmt) {
|
376 |
case SRP_NO_DATA_DESC:
|
377 |
break;
|
378 |
case SRP_DATA_DESC_DIRECT:
|
379 |
size = sizeof(struct srp_direct_buf); |
380 |
break;
|
381 |
case SRP_DATA_DESC_INDIRECT:
|
382 |
size = sizeof(struct srp_indirect_buf) + |
383 |
sizeof(struct srp_direct_buf)*cmd->data_out_desc_cnt; |
384 |
break;
|
385 |
default:
|
386 |
break;
|
387 |
} |
388 |
return size;
|
389 |
} |
390 |
|
391 |
static int vscsi_preprocess_desc(vscsi_req *req) |
392 |
{ |
393 |
struct srp_cmd *cmd = &req->iu.srp.cmd;
|
394 |
int offset, i;
|
395 |
|
396 |
offset = cmd->add_cdb_len & ~3;
|
397 |
|
398 |
if (req->writing) {
|
399 |
req->dma_fmt = cmd->buf_fmt >> 4;
|
400 |
} else {
|
401 |
offset += data_out_desc_size(cmd); |
402 |
req->dma_fmt = cmd->buf_fmt & ((1U << 4) - 1); |
403 |
} |
404 |
|
405 |
switch (req->dma_fmt) {
|
406 |
case SRP_NO_DATA_DESC:
|
407 |
break;
|
408 |
case SRP_DATA_DESC_DIRECT:
|
409 |
req->cur_desc = (struct srp_direct_buf *)(cmd->add_data + offset);
|
410 |
req->total_desc = req->local_desc = 1;
|
411 |
vscsi_swap_desc(req->cur_desc); |
412 |
dprintf("VSCSI: using direct RDMA %s, 0x%x bytes MD: 0x%llx\n",
|
413 |
req->writing ? "write" : "read", |
414 |
req->cur_desc->len, (unsigned long long)req->cur_desc->va); |
415 |
break;
|
416 |
case SRP_DATA_DESC_INDIRECT:
|
417 |
req->ind_desc = (struct srp_indirect_buf *)(cmd->add_data + offset);
|
418 |
vscsi_swap_desc(&req->ind_desc->table_desc); |
419 |
req->total_desc = req->ind_desc->table_desc.len / |
420 |
sizeof(struct srp_direct_buf); |
421 |
req->local_desc = req->writing ? cmd->data_out_desc_cnt : |
422 |
cmd->data_in_desc_cnt; |
423 |
for (i = 0; i < req->local_desc; i++) { |
424 |
vscsi_swap_desc(&req->ind_desc->desc_list[i]); |
425 |
} |
426 |
req->cur_desc = req->local_desc ? &req->ind_desc->desc_list[0] : NULL; |
427 |
dprintf("VSCSI: using indirect RDMA %s, 0x%x bytes %d descs "
|
428 |
"(%d local) VA: 0x%llx\n",
|
429 |
req->writing ? "read" : "write", |
430 |
be32_to_cpu(req->ind_desc->len), |
431 |
req->total_desc, req->local_desc, |
432 |
(unsigned long long)req->ind_desc->table_desc.va); |
433 |
break;
|
434 |
default:
|
435 |
fprintf(stderr, |
436 |
"vscsi_preprocess_desc: Unknown format %x\n", req->dma_fmt);
|
437 |
return -1; |
438 |
} |
439 |
|
440 |
return 0; |
441 |
} |
442 |
|
443 |
static void vscsi_send_request_sense(VSCSIState *s, vscsi_req *req) |
444 |
{ |
445 |
SCSIDevice *sdev = req->sdev; |
446 |
uint8_t *cdb = req->iu.srp.cmd.cdb; |
447 |
int n;
|
448 |
|
449 |
cdb[0] = 3; |
450 |
cdb[1] = 0; |
451 |
cdb[2] = 0; |
452 |
cdb[3] = 0; |
453 |
cdb[4] = 96; |
454 |
cdb[5] = 0; |
455 |
req->sensing = 1;
|
456 |
n = sdev->info->send_command(sdev, req->qtag, cdb, req->lun); |
457 |
dprintf("VSCSI: Queued request sense tag 0x%x\n", req->qtag);
|
458 |
if (n < 0) { |
459 |
fprintf(stderr, "VSCSI: REQUEST_SENSE wants write data !?!?!?\n");
|
460 |
sdev->info->cancel_io(sdev, req->qtag); |
461 |
vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
462 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
463 |
vscsi_put_req(s, req); |
464 |
return;
|
465 |
} else if (n == 0) { |
466 |
return;
|
467 |
} |
468 |
sdev->info->read_data(sdev, req->qtag); |
469 |
} |
470 |
|
471 |
/* Callback to indicate that the SCSI layer has completed a transfer. */
|
472 |
static void vscsi_command_complete(SCSIBus *bus, int reason, uint32_t tag, |
473 |
uint32_t arg) |
474 |
{ |
475 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, bus->qbus.parent); |
476 |
vscsi_req *req = vscsi_find_req(s, tag); |
477 |
SCSIDevice *sdev; |
478 |
uint8_t *buf; |
479 |
int32_t res_in = 0, res_out = 0; |
480 |
int len, rc = 0; |
481 |
|
482 |
dprintf("VSCSI: SCSI cmd complete, r=0x%x tag=0x%x arg=0x%x, req=%p\n",
|
483 |
reason, tag, arg, req); |
484 |
if (req == NULL) { |
485 |
fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", tag);
|
486 |
return;
|
487 |
} |
488 |
sdev = req->sdev; |
489 |
|
490 |
if (req->sensing) {
|
491 |
if (reason == SCSI_REASON_DONE) {
|
492 |
dprintf("VSCSI: Sense done !\n");
|
493 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
494 |
vscsi_put_req(s, req); |
495 |
} else {
|
496 |
uint8_t *buf = sdev->info->get_buf(sdev, tag); |
497 |
|
498 |
len = MIN(arg, SCSI_SENSE_BUF_SIZE); |
499 |
dprintf("VSCSI: Sense data, %d bytes:\n", len);
|
500 |
dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
|
501 |
buf[0], buf[1], buf[2], buf[3], |
502 |
buf[4], buf[5], buf[6], buf[7]); |
503 |
dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
|
504 |
buf[8], buf[9], buf[10], buf[11], |
505 |
buf[12], buf[13], buf[14], buf[15]); |
506 |
memcpy(req->sense, buf, len); |
507 |
req->senselen = len; |
508 |
sdev->info->read_data(sdev, req->qtag); |
509 |
} |
510 |
return;
|
511 |
} |
512 |
|
513 |
if (reason == SCSI_REASON_DONE) {
|
514 |
dprintf("VSCSI: Command complete err=%d\n", arg);
|
515 |
if (arg == 0) { |
516 |
/* We handle overflows, not underflows for normal commands,
|
517 |
* but hopefully nobody cares
|
518 |
*/
|
519 |
if (req->writing) {
|
520 |
res_out = req->data_len; |
521 |
} else {
|
522 |
res_in = req->data_len; |
523 |
} |
524 |
vscsi_send_rsp(s, req, 0, res_in, res_out);
|
525 |
} else if (arg == CHECK_CONDITION) { |
526 |
dprintf("VSCSI: Got CHECK_CONDITION, requesting sense...\n");
|
527 |
vscsi_send_request_sense(s, req); |
528 |
return;
|
529 |
} else {
|
530 |
vscsi_send_rsp(s, req, arg, 0, 0); |
531 |
} |
532 |
vscsi_put_req(s, req); |
533 |
return;
|
534 |
} |
535 |
|
536 |
/* "arg" is how much we have read for reads and how much we want
|
537 |
* to write for writes (ie, how much is to be DMA'd)
|
538 |
*/
|
539 |
if (arg) {
|
540 |
buf = sdev->info->get_buf(sdev, tag); |
541 |
rc = vscsi_srp_transfer_data(s, req, req->writing, buf, arg); |
542 |
} |
543 |
if (rc < 0) { |
544 |
fprintf(stderr, "VSCSI: RDMA error rc=%d!\n", rc);
|
545 |
sdev->info->cancel_io(sdev, req->qtag); |
546 |
vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
547 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
548 |
vscsi_put_req(s, req); |
549 |
return;
|
550 |
} |
551 |
|
552 |
/* Start next chunk */
|
553 |
req->data_len -= rc; |
554 |
if (req->writing) {
|
555 |
sdev->info->write_data(sdev, req->qtag); |
556 |
} else {
|
557 |
sdev->info->read_data(sdev, req->qtag); |
558 |
} |
559 |
} |
560 |
|
561 |
static void vscsi_process_login(VSCSIState *s, vscsi_req *req) |
562 |
{ |
563 |
union viosrp_iu *iu = &req->iu;
|
564 |
struct srp_login_rsp *rsp = &iu->srp.login_rsp;
|
565 |
uint64_t tag = iu->srp.rsp.tag; |
566 |
|
567 |
dprintf("VSCSI: Got login, sendin response !\n");
|
568 |
|
569 |
/* TODO handle case that requested size is wrong and
|
570 |
* buffer format is wrong
|
571 |
*/
|
572 |
memset(iu, 0, sizeof(struct srp_login_rsp)); |
573 |
rsp->opcode = SRP_LOGIN_RSP; |
574 |
/* Don't advertise quite as many request as we support to
|
575 |
* keep room for management stuff etc...
|
576 |
*/
|
577 |
rsp->req_lim_delta = cpu_to_be32(VSCSI_REQ_LIMIT-2);
|
578 |
rsp->tag = tag; |
579 |
rsp->max_it_iu_len = cpu_to_be32(sizeof(union srp_iu)); |
580 |
rsp->max_ti_iu_len = cpu_to_be32(sizeof(union srp_iu)); |
581 |
/* direct and indirect */
|
582 |
rsp->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | SRP_BUF_FORMAT_INDIRECT); |
583 |
|
584 |
vscsi_send_iu(s, req, sizeof(*rsp), VIOSRP_SRP_FORMAT);
|
585 |
} |
586 |
|
587 |
static void vscsi_inquiry_no_target(VSCSIState *s, vscsi_req *req) |
588 |
{ |
589 |
uint8_t *cdb = req->iu.srp.cmd.cdb; |
590 |
uint8_t resp_data[36];
|
591 |
int rc, len, alen;
|
592 |
|
593 |
/* We dont do EVPD. Also check that page_code is 0 */
|
594 |
if ((cdb[1] & 0x01) || (cdb[1] & 0x01) || cdb[2] != 0) { |
595 |
/* Send INVALID FIELD IN CDB */
|
596 |
vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0); |
597 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
598 |
return;
|
599 |
} |
600 |
alen = cdb[3];
|
601 |
alen = (alen << 8) | cdb[4]; |
602 |
len = MIN(alen, 36);
|
603 |
|
604 |
/* Fake up inquiry using PQ=3 */
|
605 |
memset(resp_data, 0, 36); |
606 |
resp_data[0] = 0x7f; /* Not capable of supporting a device here */ |
607 |
resp_data[2] = 0x06; /* SPS-4 */ |
608 |
resp_data[3] = 0x02; /* Resp data format */ |
609 |
resp_data[4] = 36 - 5; /* Additional length */ |
610 |
resp_data[7] = 0x10; /* Sync transfers */ |
611 |
memcpy(&resp_data[16], "QEMU EMPTY ", 16); |
612 |
memcpy(&resp_data[8], "QEMU ", 8); |
613 |
|
614 |
req->writing = 0;
|
615 |
vscsi_preprocess_desc(req); |
616 |
rc = vscsi_srp_transfer_data(s, req, 0, resp_data, len);
|
617 |
if (rc < 0) { |
618 |
vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
619 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
620 |
} else {
|
621 |
vscsi_send_rsp(s, req, 0, 36 - rc, 0); |
622 |
} |
623 |
} |
624 |
|
625 |
static int vscsi_queue_cmd(VSCSIState *s, vscsi_req *req) |
626 |
{ |
627 |
union srp_iu *srp = &req->iu.srp;
|
628 |
SCSIDevice *sdev; |
629 |
int n, id, lun;
|
630 |
|
631 |
vscsi_decode_id_lun(be64_to_cpu(srp->cmd.lun), &id, &lun); |
632 |
|
633 |
/* Qemu vs. linux issue with LUNs to be sorted out ... */
|
634 |
sdev = (id < 8 && lun < 16) ? s->bus.devs[id] : NULL; |
635 |
if (!sdev) {
|
636 |
dprintf("VSCSI: Command for id %d with no drive\n", id);
|
637 |
if (srp->cmd.cdb[0] == INQUIRY) { |
638 |
vscsi_inquiry_no_target(s, req); |
639 |
} else {
|
640 |
vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0x00); |
641 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
642 |
} return 1; |
643 |
} |
644 |
|
645 |
req->sdev = sdev; |
646 |
req->lun = lun; |
647 |
n = sdev->info->send_command(sdev, req->qtag, srp->cmd.cdb, lun); |
648 |
|
649 |
dprintf("VSCSI: Queued command tag 0x%x CMD 0x%x ID %d LUN %d ret: %d\n",
|
650 |
req->qtag, srp->cmd.cdb[0], id, lun, n);
|
651 |
|
652 |
if (n) {
|
653 |
/* Transfer direction must be set before preprocessing the
|
654 |
* descriptors
|
655 |
*/
|
656 |
req->writing = (n < 1);
|
657 |
|
658 |
/* Preprocess RDMA descriptors */
|
659 |
vscsi_preprocess_desc(req); |
660 |
} |
661 |
|
662 |
/* Get transfer direction and initiate transfer */
|
663 |
if (n > 0) { |
664 |
req->data_len = n; |
665 |
sdev->info->read_data(sdev, req->qtag); |
666 |
} else if (n < 0) { |
667 |
req->data_len = -n; |
668 |
sdev->info->write_data(sdev, req->qtag); |
669 |
} |
670 |
/* Don't touch req here, it may have been recycled already */
|
671 |
|
672 |
return 0; |
673 |
} |
674 |
|
675 |
static int vscsi_process_tsk_mgmt(VSCSIState *s, vscsi_req *req) |
676 |
{ |
677 |
union viosrp_iu *iu = &req->iu;
|
678 |
int fn;
|
679 |
|
680 |
fprintf(stderr, "vscsi_process_tsk_mgmt %02x\n",
|
681 |
iu->srp.tsk_mgmt.tsk_mgmt_func); |
682 |
|
683 |
switch (iu->srp.tsk_mgmt.tsk_mgmt_func) {
|
684 |
#if 0 /* We really don't deal with these for now */
|
685 |
case SRP_TSK_ABORT_TASK:
|
686 |
fn = ABORT_TASK;
|
687 |
break;
|
688 |
case SRP_TSK_ABORT_TASK_SET:
|
689 |
fn = ABORT_TASK_SET;
|
690 |
break;
|
691 |
case SRP_TSK_CLEAR_TASK_SET:
|
692 |
fn = CLEAR_TASK_SET;
|
693 |
break;
|
694 |
case SRP_TSK_LUN_RESET:
|
695 |
fn = LOGICAL_UNIT_RESET;
|
696 |
break;
|
697 |
case SRP_TSK_CLEAR_ACA:
|
698 |
fn = CLEAR_ACA;
|
699 |
break;
|
700 |
#endif
|
701 |
default:
|
702 |
fn = 0;
|
703 |
} |
704 |
if (fn) {
|
705 |
/* XXX Send/Handle target task management */
|
706 |
; |
707 |
} else {
|
708 |
vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x20, 0); |
709 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
710 |
} |
711 |
return !fn;
|
712 |
} |
713 |
|
714 |
static int vscsi_handle_srp_req(VSCSIState *s, vscsi_req *req) |
715 |
{ |
716 |
union srp_iu *srp = &req->iu.srp;
|
717 |
int done = 1; |
718 |
uint8_t opcode = srp->rsp.opcode; |
719 |
|
720 |
switch (opcode) {
|
721 |
case SRP_LOGIN_REQ:
|
722 |
vscsi_process_login(s, req); |
723 |
break;
|
724 |
case SRP_TSK_MGMT:
|
725 |
done = vscsi_process_tsk_mgmt(s, req); |
726 |
break;
|
727 |
case SRP_CMD:
|
728 |
done = vscsi_queue_cmd(s, req); |
729 |
break;
|
730 |
case SRP_LOGIN_RSP:
|
731 |
case SRP_I_LOGOUT:
|
732 |
case SRP_T_LOGOUT:
|
733 |
case SRP_RSP:
|
734 |
case SRP_CRED_REQ:
|
735 |
case SRP_CRED_RSP:
|
736 |
case SRP_AER_REQ:
|
737 |
case SRP_AER_RSP:
|
738 |
fprintf(stderr, "VSCSI: Unsupported opcode %02x\n", opcode);
|
739 |
break;
|
740 |
default:
|
741 |
fprintf(stderr, "VSCSI: Unknown type %02x\n", opcode);
|
742 |
} |
743 |
|
744 |
return done;
|
745 |
} |
746 |
|
747 |
static int vscsi_send_adapter_info(VSCSIState *s, vscsi_req *req) |
748 |
{ |
749 |
struct viosrp_adapter_info *sinfo;
|
750 |
struct mad_adapter_info_data info;
|
751 |
int rc;
|
752 |
|
753 |
sinfo = &req->iu.mad.adapter_info; |
754 |
|
755 |
#if 0 /* What for ? */
|
756 |
rc = spapr_tce_dma_read(&s->vdev, be64_to_cpu(sinfo->buffer),
|
757 |
&info, be16_to_cpu(sinfo->common.length));
|
758 |
if (rc) {
|
759 |
fprintf(stderr, "vscsi_send_adapter_info: DMA read failure !\n");
|
760 |
}
|
761 |
#endif
|
762 |
memset(&info, 0, sizeof(info)); |
763 |
strcpy(info.srp_version, SRP_VERSION); |
764 |
strncpy(info.partition_name, "qemu", sizeof("qemu")); |
765 |
info.partition_number = cpu_to_be32(0);
|
766 |
info.mad_version = cpu_to_be32(1);
|
767 |
info.os_type = cpu_to_be32(2);
|
768 |
info.port_max_txu[0] = cpu_to_be32(VSCSI_MAX_SECTORS << 9); |
769 |
|
770 |
rc = spapr_tce_dma_write(&s->vdev, be64_to_cpu(sinfo->buffer), |
771 |
&info, be16_to_cpu(sinfo->common.length)); |
772 |
if (rc) {
|
773 |
fprintf(stderr, "vscsi_send_adapter_info: DMA write failure !\n");
|
774 |
} |
775 |
|
776 |
sinfo->common.status = rc ? cpu_to_be32(1) : 0; |
777 |
|
778 |
return vscsi_send_iu(s, req, sizeof(*sinfo), VIOSRP_MAD_FORMAT); |
779 |
} |
780 |
|
781 |
static int vscsi_handle_mad_req(VSCSIState *s, vscsi_req *req) |
782 |
{ |
783 |
union mad_iu *mad = &req->iu.mad;
|
784 |
|
785 |
switch (be32_to_cpu(mad->empty_iu.common.type)) {
|
786 |
case VIOSRP_EMPTY_IU_TYPE:
|
787 |
fprintf(stderr, "Unsupported EMPTY MAD IU\n");
|
788 |
break;
|
789 |
case VIOSRP_ERROR_LOG_TYPE:
|
790 |
fprintf(stderr, "Unsupported ERROR LOG MAD IU\n");
|
791 |
mad->error_log.common.status = cpu_to_be16(1);
|
792 |
vscsi_send_iu(s, req, sizeof(mad->error_log), VIOSRP_MAD_FORMAT);
|
793 |
break;
|
794 |
case VIOSRP_ADAPTER_INFO_TYPE:
|
795 |
vscsi_send_adapter_info(s, req); |
796 |
break;
|
797 |
case VIOSRP_HOST_CONFIG_TYPE:
|
798 |
mad->host_config.common.status = cpu_to_be16(1);
|
799 |
vscsi_send_iu(s, req, sizeof(mad->host_config), VIOSRP_MAD_FORMAT);
|
800 |
break;
|
801 |
default:
|
802 |
fprintf(stderr, "VSCSI: Unknown MAD type %02x\n",
|
803 |
be32_to_cpu(mad->empty_iu.common.type)); |
804 |
} |
805 |
|
806 |
return 1; |
807 |
} |
808 |
|
809 |
static void vscsi_got_payload(VSCSIState *s, vscsi_crq *crq) |
810 |
{ |
811 |
vscsi_req *req; |
812 |
int done;
|
813 |
|
814 |
req = vscsi_get_req(s); |
815 |
if (req == NULL) { |
816 |
fprintf(stderr, "VSCSI: Failed to get a request !\n");
|
817 |
return;
|
818 |
} |
819 |
|
820 |
/* We only support a limited number of descriptors, we know
|
821 |
* the ibmvscsi driver uses up to 10 max, so it should fit
|
822 |
* in our 256 bytes IUs. If not we'll have to increase the size
|
823 |
* of the structure.
|
824 |
*/
|
825 |
if (crq->s.IU_length > sizeof(union viosrp_iu)) { |
826 |
fprintf(stderr, "VSCSI: SRP IU too long (%d bytes) !\n",
|
827 |
crq->s.IU_length); |
828 |
return;
|
829 |
} |
830 |
|
831 |
/* XXX Handle failure differently ? */
|
832 |
if (spapr_tce_dma_read(&s->vdev, crq->s.IU_data_ptr, &req->iu,
|
833 |
crq->s.IU_length)) { |
834 |
fprintf(stderr, "vscsi_got_payload: DMA read failure !\n");
|
835 |
qemu_free(req); |
836 |
} |
837 |
memcpy(&req->crq, crq, sizeof(vscsi_crq));
|
838 |
|
839 |
if (crq->s.format == VIOSRP_MAD_FORMAT) {
|
840 |
done = vscsi_handle_mad_req(s, req); |
841 |
} else {
|
842 |
done = vscsi_handle_srp_req(s, req); |
843 |
} |
844 |
|
845 |
if (done) {
|
846 |
vscsi_put_req(s, req); |
847 |
} |
848 |
} |
849 |
|
850 |
|
851 |
static int vscsi_do_crq(struct VIOsPAPRDevice *dev, uint8_t *crq_data) |
852 |
{ |
853 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev); |
854 |
vscsi_crq crq; |
855 |
|
856 |
memcpy(crq.raw, crq_data, 16);
|
857 |
crq.s.timeout = be16_to_cpu(crq.s.timeout); |
858 |
crq.s.IU_length = be16_to_cpu(crq.s.IU_length); |
859 |
crq.s.IU_data_ptr = be64_to_cpu(crq.s.IU_data_ptr); |
860 |
|
861 |
dprintf("VSCSI: do_crq %02x %02x ...\n", crq.raw[0], crq.raw[1]); |
862 |
|
863 |
switch (crq.s.valid) {
|
864 |
case 0xc0: /* Init command/response */ |
865 |
|
866 |
/* Respond to initialization request */
|
867 |
if (crq.s.format == 0x01) { |
868 |
memset(crq.raw, 0, 16); |
869 |
crq.s.valid = 0xc0;
|
870 |
crq.s.format = 0x02;
|
871 |
spapr_vio_send_crq(dev, crq.raw); |
872 |
} |
873 |
|
874 |
/* Note that in hotplug cases, we might get a 0x02
|
875 |
* as a result of us emitting the init request
|
876 |
*/
|
877 |
|
878 |
break;
|
879 |
case 0xff: /* Link event */ |
880 |
|
881 |
/* Not handled for now */
|
882 |
|
883 |
break;
|
884 |
case 0x80: /* Payloads */ |
885 |
switch (crq.s.format) {
|
886 |
case VIOSRP_SRP_FORMAT: /* AKA VSCSI request */ |
887 |
case VIOSRP_MAD_FORMAT: /* AKA VSCSI response */ |
888 |
vscsi_got_payload(s, &crq); |
889 |
break;
|
890 |
case VIOSRP_OS400_FORMAT:
|
891 |
case VIOSRP_AIX_FORMAT:
|
892 |
case VIOSRP_LINUX_FORMAT:
|
893 |
case VIOSRP_INLINE_FORMAT:
|
894 |
fprintf(stderr, "vscsi_do_srq: Unsupported payload format %02x\n",
|
895 |
crq.s.format); |
896 |
break;
|
897 |
default:
|
898 |
fprintf(stderr, "vscsi_do_srq: Unknown payload format %02x\n",
|
899 |
crq.s.format); |
900 |
} |
901 |
break;
|
902 |
default:
|
903 |
fprintf(stderr, "vscsi_do_crq: unknown CRQ %02x %02x ...\n",
|
904 |
crq.raw[0], crq.raw[1]); |
905 |
}; |
906 |
|
907 |
return 0; |
908 |
} |
909 |
|
910 |
static int spapr_vscsi_init(VIOsPAPRDevice *dev) |
911 |
{ |
912 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev); |
913 |
int i;
|
914 |
|
915 |
dbg_vscsi_state = s; |
916 |
|
917 |
/* Initialize qemu request tags */
|
918 |
memset(s->reqs, 0, sizeof(s->reqs)); |
919 |
for (i = 0; i < VSCSI_REQ_LIMIT; i++) { |
920 |
s->reqs[i].qtag = i; |
921 |
} |
922 |
|
923 |
dev->crq.SendFunc = vscsi_do_crq; |
924 |
|
925 |
scsi_bus_new(&s->bus, &dev->qdev, 1, VSCSI_REQ_LIMIT,
|
926 |
vscsi_command_complete); |
927 |
if (!dev->qdev.hotplugged) {
|
928 |
scsi_bus_legacy_handle_cmdline(&s->bus); |
929 |
} |
930 |
|
931 |
return 0; |
932 |
} |
933 |
|
934 |
void spapr_vscsi_create(VIOsPAPRBus *bus, uint32_t reg,
|
935 |
qemu_irq qirq, uint32_t vio_irq_num) |
936 |
{ |
937 |
DeviceState *dev; |
938 |
VIOsPAPRDevice *sdev; |
939 |
|
940 |
dev = qdev_create(&bus->bus, "spapr-vscsi");
|
941 |
qdev_prop_set_uint32(dev, "reg", reg);
|
942 |
|
943 |
qdev_init_nofail(dev); |
944 |
|
945 |
sdev = (VIOsPAPRDevice *)dev; |
946 |
sdev->qirq = qirq; |
947 |
sdev->vio_irq_num = vio_irq_num; |
948 |
} |
949 |
|
950 |
static int spapr_vscsi_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off) |
951 |
{ |
952 |
int ret;
|
953 |
|
954 |
ret = fdt_setprop_cell(fdt, node_off, "#address-cells", 2); |
955 |
if (ret < 0) { |
956 |
return ret;
|
957 |
} |
958 |
|
959 |
ret = fdt_setprop_cell(fdt, node_off, "#size-cells", 0); |
960 |
if (ret < 0) { |
961 |
return ret;
|
962 |
} |
963 |
|
964 |
return 0; |
965 |
} |
966 |
|
967 |
static VIOsPAPRDeviceInfo spapr_vscsi = {
|
968 |
.init = spapr_vscsi_init, |
969 |
.devnode = spapr_vscsi_devnode, |
970 |
.dt_name = "v-scsi",
|
971 |
.dt_type = "vscsi",
|
972 |
.dt_compatible = "IBM,v-scsi",
|
973 |
.signal_mask = 0x00000001,
|
974 |
.qdev.name = "spapr-vscsi",
|
975 |
.qdev.size = sizeof(VSCSIState),
|
976 |
.qdev.props = (Property[]) { |
977 |
DEFINE_PROP_UINT32("reg", VIOsPAPRDevice, reg, 0x2000), |
978 |
DEFINE_PROP_UINT32("dma-window", VIOsPAPRDevice,
|
979 |
rtce_window_size, 0x10000000),
|
980 |
DEFINE_PROP_END_OF_LIST(), |
981 |
}, |
982 |
}; |
983 |
|
984 |
static void spapr_vscsi_register(void) |
985 |
{ |
986 |
spapr_vio_bus_register_withprop(&spapr_vscsi); |
987 |
} |
988 |
device_init(spapr_vscsi_register); |