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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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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 SCSIDevice *vscsi_device_find(SCSIBus *bus, uint64_t srp_lun, int *lun) |
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{ |
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int channel = 0, id = 0; |
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retry:
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switch (srp_lun >> 62) { |
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case 0: |
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if ((srp_lun >> 56) != 0) { |
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channel = (srp_lun >> 56) & 0x3f; |
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id = (srp_lun >> 48) & 0xff; |
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srp_lun <<= 16;
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goto retry;
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} |
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*lun = (srp_lun >> 48) & 0xff; |
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break;
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case 1: |
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*lun = (srp_lun >> 48) & 0x3fff; |
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break;
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case 2: |
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channel = (srp_lun >> 53) & 0x7; |
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id = (srp_lun >> 56) & 0x3f; |
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*lun = (srp_lun >> 48) & 0x1f; |
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break;
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case 3: |
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*lun = -1;
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return NULL; |
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default:
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abort(); |
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} |
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return scsi_device_find(bus, channel, id, *lun);
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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_vio_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; |
249 |
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; |
259 |
} |
260 |
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vscsi_send_iu(s, req, total_len, VIOSRP_SRP_FORMAT); |
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return 0; |
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} |
264 |
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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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} |
270 |
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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) |
273 |
{ |
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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; |
277 |
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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); |
280 |
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llen = MIN(len, md->len); |
282 |
if (llen) {
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if (req->writing) { /* writing = to device = reading from memory */ |
284 |
rc = spapr_vio_dma_read(&s->vdev, md->va, buf, llen); |
285 |
} else {
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rc = spapr_vio_dma_write(&s->vdev, md->va, buf, llen); |
287 |
} |
288 |
} |
289 |
md->len -= llen; |
290 |
md->va += llen; |
291 |
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if (rc) {
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return -1; |
294 |
} |
295 |
return llen;
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} |
297 |
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static int vscsi_srp_indirect_data(VSCSIState *s, vscsi_req *req, |
299 |
uint8_t *buf, uint32_t len) |
300 |
{ |
301 |
struct srp_direct_buf *td = &req->ind_desc->table_desc;
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302 |
struct srp_direct_buf *md = req->cur_desc;
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int rc = 0; |
304 |
uint32_t llen, total = 0;
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305 |
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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); |
308 |
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/* While we have data ... */
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310 |
while (len) {
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311 |
/* If we have a descriptor but it's empty, go fetch a new one */
|
312 |
if (md && md->len == 0) { |
313 |
/* More local available, use one */
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314 |
if (req->local_desc) {
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315 |
md = ++req->cur_desc; |
316 |
--req->local_desc; |
317 |
--req->total_desc; |
318 |
td->va += sizeof(struct srp_direct_buf); |
319 |
} else {
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320 |
md = req->cur_desc = NULL;
|
321 |
} |
322 |
} |
323 |
/* No descriptor at hand, fetch one */
|
324 |
if (!md) {
|
325 |
if (!req->total_desc) {
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326 |
dprintf("VSCSI: Out of descriptors !\n");
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327 |
break;
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328 |
} |
329 |
md = req->cur_desc = &req->ext_desc; |
330 |
dprintf("VSCSI: Reading desc from 0x%llx\n",
|
331 |
(unsigned long long)td->va); |
332 |
rc = spapr_vio_dma_read(&s->vdev, td->va, md, |
333 |
sizeof(struct srp_direct_buf)); |
334 |
if (rc) {
|
335 |
dprintf("VSCSI: spapr_vio_dma_read -> %d reading ext_desc\n",
|
336 |
rc); |
337 |
break;
|
338 |
} |
339 |
vscsi_swap_desc(md); |
340 |
td->va += sizeof(struct srp_direct_buf); |
341 |
--req->total_desc; |
342 |
} |
343 |
dprintf("VSCSI: [desc va=0x%llx,len=0x%x] remaining=0x%x\n",
|
344 |
(unsigned long long)md->va, md->len, len); |
345 |
|
346 |
/* Perform transfer */
|
347 |
llen = MIN(len, md->len); |
348 |
if (req->writing) { /* writing = to device = reading from memory */ |
349 |
rc = spapr_vio_dma_read(&s->vdev, md->va, buf, llen); |
350 |
} else {
|
351 |
rc = spapr_vio_dma_write(&s->vdev, md->va, buf, llen); |
352 |
} |
353 |
if (rc) {
|
354 |
dprintf("VSCSI: spapr_vio_dma_r/w(%d) -> %d\n", req->writing, rc);
|
355 |
break;
|
356 |
} |
357 |
dprintf("VSCSI: data: %02x %02x %02x %02x...\n",
|
358 |
buf[0], buf[1], buf[2], buf[3]); |
359 |
|
360 |
len -= llen; |
361 |
buf += llen; |
362 |
total += llen; |
363 |
md->va += llen; |
364 |
md->len -= llen; |
365 |
} |
366 |
return rc ? -1 : total; |
367 |
} |
368 |
|
369 |
static int vscsi_srp_transfer_data(VSCSIState *s, vscsi_req *req, |
370 |
int writing, uint8_t *buf, uint32_t len)
|
371 |
{ |
372 |
int err = 0; |
373 |
|
374 |
switch (req->dma_fmt) {
|
375 |
case SRP_NO_DATA_DESC:
|
376 |
dprintf("VSCSI: no data desc transfer, skipping 0x%x bytes\n", len);
|
377 |
break;
|
378 |
case SRP_DATA_DESC_DIRECT:
|
379 |
err = vscsi_srp_direct_data(s, req, buf, len); |
380 |
break;
|
381 |
case SRP_DATA_DESC_INDIRECT:
|
382 |
err = vscsi_srp_indirect_data(s, req, buf, len); |
383 |
break;
|
384 |
} |
385 |
return err;
|
386 |
} |
387 |
|
388 |
/* Bits from linux srp */
|
389 |
static int data_out_desc_size(struct srp_cmd *cmd) |
390 |
{ |
391 |
int size = 0; |
392 |
uint8_t fmt = cmd->buf_fmt >> 4;
|
393 |
|
394 |
switch (fmt) {
|
395 |
case SRP_NO_DATA_DESC:
|
396 |
break;
|
397 |
case SRP_DATA_DESC_DIRECT:
|
398 |
size = sizeof(struct srp_direct_buf); |
399 |
break;
|
400 |
case SRP_DATA_DESC_INDIRECT:
|
401 |
size = sizeof(struct srp_indirect_buf) + |
402 |
sizeof(struct srp_direct_buf)*cmd->data_out_desc_cnt; |
403 |
break;
|
404 |
default:
|
405 |
break;
|
406 |
} |
407 |
return size;
|
408 |
} |
409 |
|
410 |
static int vscsi_preprocess_desc(vscsi_req *req) |
411 |
{ |
412 |
struct srp_cmd *cmd = &req->iu.srp.cmd;
|
413 |
int offset, i;
|
414 |
|
415 |
offset = cmd->add_cdb_len & ~3;
|
416 |
|
417 |
if (req->writing) {
|
418 |
req->dma_fmt = cmd->buf_fmt >> 4;
|
419 |
} else {
|
420 |
offset += data_out_desc_size(cmd); |
421 |
req->dma_fmt = cmd->buf_fmt & ((1U << 4) - 1); |
422 |
} |
423 |
|
424 |
switch (req->dma_fmt) {
|
425 |
case SRP_NO_DATA_DESC:
|
426 |
break;
|
427 |
case SRP_DATA_DESC_DIRECT:
|
428 |
req->cur_desc = (struct srp_direct_buf *)(cmd->add_data + offset);
|
429 |
req->total_desc = req->local_desc = 1;
|
430 |
vscsi_swap_desc(req->cur_desc); |
431 |
dprintf("VSCSI: using direct RDMA %s, 0x%x bytes MD: 0x%llx\n",
|
432 |
req->writing ? "write" : "read", |
433 |
req->cur_desc->len, (unsigned long long)req->cur_desc->va); |
434 |
break;
|
435 |
case SRP_DATA_DESC_INDIRECT:
|
436 |
req->ind_desc = (struct srp_indirect_buf *)(cmd->add_data + offset);
|
437 |
vscsi_swap_desc(&req->ind_desc->table_desc); |
438 |
req->total_desc = req->ind_desc->table_desc.len / |
439 |
sizeof(struct srp_direct_buf); |
440 |
req->local_desc = req->writing ? cmd->data_out_desc_cnt : |
441 |
cmd->data_in_desc_cnt; |
442 |
for (i = 0; i < req->local_desc; i++) { |
443 |
vscsi_swap_desc(&req->ind_desc->desc_list[i]); |
444 |
} |
445 |
req->cur_desc = req->local_desc ? &req->ind_desc->desc_list[0] : NULL; |
446 |
dprintf("VSCSI: using indirect RDMA %s, 0x%x bytes %d descs "
|
447 |
"(%d local) VA: 0x%llx\n",
|
448 |
req->writing ? "read" : "write", |
449 |
be32_to_cpu(req->ind_desc->len), |
450 |
req->total_desc, req->local_desc, |
451 |
(unsigned long long)req->ind_desc->table_desc.va); |
452 |
break;
|
453 |
default:
|
454 |
fprintf(stderr, |
455 |
"vscsi_preprocess_desc: Unknown format %x\n", req->dma_fmt);
|
456 |
return -1; |
457 |
} |
458 |
|
459 |
return 0; |
460 |
} |
461 |
|
462 |
/* Callback to indicate that the SCSI layer has completed a transfer. */
|
463 |
static void vscsi_transfer_data(SCSIRequest *sreq, uint32_t len) |
464 |
{ |
465 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent); |
466 |
vscsi_req *req = sreq->hba_private; |
467 |
uint8_t *buf; |
468 |
int rc = 0; |
469 |
|
470 |
dprintf("VSCSI: SCSI xfer complete tag=0x%x len=0x%x, req=%p\n",
|
471 |
sreq->tag, len, req); |
472 |
if (req == NULL) { |
473 |
fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", sreq->tag);
|
474 |
return;
|
475 |
} |
476 |
|
477 |
if (len) {
|
478 |
buf = scsi_req_get_buf(sreq); |
479 |
rc = vscsi_srp_transfer_data(s, req, req->writing, buf, len); |
480 |
} |
481 |
if (rc < 0) { |
482 |
fprintf(stderr, "VSCSI: RDMA error rc=%d!\n", rc);
|
483 |
vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
484 |
scsi_req_abort(req->sreq, CHECK_CONDITION); |
485 |
return;
|
486 |
} |
487 |
|
488 |
/* Start next chunk */
|
489 |
req->data_len -= rc; |
490 |
scsi_req_continue(sreq); |
491 |
} |
492 |
|
493 |
/* Callback to indicate that the SCSI layer has completed a transfer. */
|
494 |
static void vscsi_command_complete(SCSIRequest *sreq, uint32_t status, size_t resid) |
495 |
{ |
496 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, sreq->bus->qbus.parent); |
497 |
vscsi_req *req = sreq->hba_private; |
498 |
int32_t res_in = 0, res_out = 0; |
499 |
|
500 |
dprintf("VSCSI: SCSI cmd complete, r=0x%x tag=0x%x status=0x%x, req=%p\n",
|
501 |
reason, sreq->tag, status, req); |
502 |
if (req == NULL) { |
503 |
fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", sreq->tag);
|
504 |
return;
|
505 |
} |
506 |
|
507 |
if (status == CHECK_CONDITION) {
|
508 |
req->senselen = scsi_req_get_sense(req->sreq, req->sense, |
509 |
sizeof(req->sense));
|
510 |
dprintf("VSCSI: Sense data, %d bytes:\n", len);
|
511 |
dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
|
512 |
req->sense[0], req->sense[1], req->sense[2], req->sense[3], |
513 |
req->sense[4], req->sense[5], req->sense[6], req->sense[7]); |
514 |
dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
|
515 |
req->sense[8], req->sense[9], req->sense[10], req->sense[11], |
516 |
req->sense[12], req->sense[13], req->sense[14], req->sense[15]); |
517 |
} |
518 |
|
519 |
dprintf("VSCSI: Command complete err=%d\n", status);
|
520 |
if (status == 0) { |
521 |
/* We handle overflows, not underflows for normal commands,
|
522 |
* but hopefully nobody cares
|
523 |
*/
|
524 |
if (req->writing) {
|
525 |
res_out = req->data_len; |
526 |
} else {
|
527 |
res_in = req->data_len; |
528 |
} |
529 |
} |
530 |
vscsi_send_rsp(s, req, status, res_in, res_out); |
531 |
vscsi_put_req(req); |
532 |
} |
533 |
|
534 |
static void vscsi_request_cancelled(SCSIRequest *sreq) |
535 |
{ |
536 |
vscsi_req *req = sreq->hba_private; |
537 |
|
538 |
vscsi_put_req(req); |
539 |
} |
540 |
|
541 |
static void vscsi_process_login(VSCSIState *s, vscsi_req *req) |
542 |
{ |
543 |
union viosrp_iu *iu = &req->iu;
|
544 |
struct srp_login_rsp *rsp = &iu->srp.login_rsp;
|
545 |
uint64_t tag = iu->srp.rsp.tag; |
546 |
|
547 |
dprintf("VSCSI: Got login, sendin response !\n");
|
548 |
|
549 |
/* TODO handle case that requested size is wrong and
|
550 |
* buffer format is wrong
|
551 |
*/
|
552 |
memset(iu, 0, sizeof(struct srp_login_rsp)); |
553 |
rsp->opcode = SRP_LOGIN_RSP; |
554 |
/* Don't advertise quite as many request as we support to
|
555 |
* keep room for management stuff etc...
|
556 |
*/
|
557 |
rsp->req_lim_delta = cpu_to_be32(VSCSI_REQ_LIMIT-2);
|
558 |
rsp->tag = tag; |
559 |
rsp->max_it_iu_len = cpu_to_be32(sizeof(union srp_iu)); |
560 |
rsp->max_ti_iu_len = cpu_to_be32(sizeof(union srp_iu)); |
561 |
/* direct and indirect */
|
562 |
rsp->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | SRP_BUF_FORMAT_INDIRECT); |
563 |
|
564 |
vscsi_send_iu(s, req, sizeof(*rsp), VIOSRP_SRP_FORMAT);
|
565 |
} |
566 |
|
567 |
static void vscsi_inquiry_no_target(VSCSIState *s, vscsi_req *req) |
568 |
{ |
569 |
uint8_t *cdb = req->iu.srp.cmd.cdb; |
570 |
uint8_t resp_data[36];
|
571 |
int rc, len, alen;
|
572 |
|
573 |
/* We dont do EVPD. Also check that page_code is 0 */
|
574 |
if ((cdb[1] & 0x01) || (cdb[1] & 0x01) || cdb[2] != 0) { |
575 |
/* Send INVALID FIELD IN CDB */
|
576 |
vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0); |
577 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
578 |
return;
|
579 |
} |
580 |
alen = cdb[3];
|
581 |
alen = (alen << 8) | cdb[4]; |
582 |
len = MIN(alen, 36);
|
583 |
|
584 |
/* Fake up inquiry using PQ=3 */
|
585 |
memset(resp_data, 0, 36); |
586 |
resp_data[0] = 0x7f; /* Not capable of supporting a device here */ |
587 |
resp_data[2] = 0x06; /* SPS-4 */ |
588 |
resp_data[3] = 0x02; /* Resp data format */ |
589 |
resp_data[4] = 36 - 5; /* Additional length */ |
590 |
resp_data[7] = 0x10; /* Sync transfers */ |
591 |
memcpy(&resp_data[16], "QEMU EMPTY ", 16); |
592 |
memcpy(&resp_data[8], "QEMU ", 8); |
593 |
|
594 |
req->writing = 0;
|
595 |
vscsi_preprocess_desc(req); |
596 |
rc = vscsi_srp_transfer_data(s, req, 0, resp_data, len);
|
597 |
if (rc < 0) { |
598 |
vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0); |
599 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
600 |
} else {
|
601 |
vscsi_send_rsp(s, req, 0, 36 - rc, 0); |
602 |
} |
603 |
} |
604 |
|
605 |
static int vscsi_queue_cmd(VSCSIState *s, vscsi_req *req) |
606 |
{ |
607 |
union srp_iu *srp = &req->iu.srp;
|
608 |
SCSIDevice *sdev; |
609 |
int n, lun;
|
610 |
|
611 |
sdev = vscsi_device_find(&s->bus, be64_to_cpu(srp->cmd.lun), &lun); |
612 |
if (!sdev) {
|
613 |
dprintf("VSCSI: Command for lun %08" PRIx64 " with no drive\n", be64_to_cpu(srp->cmd.lun)); |
614 |
if (srp->cmd.cdb[0] == INQUIRY) { |
615 |
vscsi_inquiry_no_target(s, req); |
616 |
} else {
|
617 |
vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0x00); |
618 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
619 |
} return 1; |
620 |
} |
621 |
|
622 |
req->lun = lun; |
623 |
req->sreq = scsi_req_new(sdev, req->qtag, lun, srp->cmd.cdb, req); |
624 |
n = scsi_req_enqueue(req->sreq); |
625 |
|
626 |
dprintf("VSCSI: Queued command tag 0x%x CMD 0x%x ID %d LUN %d ret: %d\n",
|
627 |
req->qtag, srp->cmd.cdb[0], id, lun, n);
|
628 |
|
629 |
if (n) {
|
630 |
/* Transfer direction must be set before preprocessing the
|
631 |
* descriptors
|
632 |
*/
|
633 |
req->writing = (n < 1);
|
634 |
|
635 |
/* Preprocess RDMA descriptors */
|
636 |
vscsi_preprocess_desc(req); |
637 |
|
638 |
/* Get transfer direction and initiate transfer */
|
639 |
if (n > 0) { |
640 |
req->data_len = n; |
641 |
} else if (n < 0) { |
642 |
req->data_len = -n; |
643 |
} |
644 |
scsi_req_continue(req->sreq); |
645 |
} |
646 |
/* Don't touch req here, it may have been recycled already */
|
647 |
|
648 |
return 0; |
649 |
} |
650 |
|
651 |
static int vscsi_process_tsk_mgmt(VSCSIState *s, vscsi_req *req) |
652 |
{ |
653 |
union viosrp_iu *iu = &req->iu;
|
654 |
int fn;
|
655 |
|
656 |
fprintf(stderr, "vscsi_process_tsk_mgmt %02x\n",
|
657 |
iu->srp.tsk_mgmt.tsk_mgmt_func); |
658 |
|
659 |
switch (iu->srp.tsk_mgmt.tsk_mgmt_func) {
|
660 |
#if 0 /* We really don't deal with these for now */
|
661 |
case SRP_TSK_ABORT_TASK:
|
662 |
fn = ABORT_TASK;
|
663 |
break;
|
664 |
case SRP_TSK_ABORT_TASK_SET:
|
665 |
fn = ABORT_TASK_SET;
|
666 |
break;
|
667 |
case SRP_TSK_CLEAR_TASK_SET:
|
668 |
fn = CLEAR_TASK_SET;
|
669 |
break;
|
670 |
case SRP_TSK_LUN_RESET:
|
671 |
fn = LOGICAL_UNIT_RESET;
|
672 |
break;
|
673 |
case SRP_TSK_CLEAR_ACA:
|
674 |
fn = CLEAR_ACA;
|
675 |
break;
|
676 |
#endif
|
677 |
default:
|
678 |
fn = 0;
|
679 |
} |
680 |
if (fn) {
|
681 |
/* XXX Send/Handle target task management */
|
682 |
; |
683 |
} else {
|
684 |
vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x20, 0); |
685 |
vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0); |
686 |
} |
687 |
return !fn;
|
688 |
} |
689 |
|
690 |
static int vscsi_handle_srp_req(VSCSIState *s, vscsi_req *req) |
691 |
{ |
692 |
union srp_iu *srp = &req->iu.srp;
|
693 |
int done = 1; |
694 |
uint8_t opcode = srp->rsp.opcode; |
695 |
|
696 |
switch (opcode) {
|
697 |
case SRP_LOGIN_REQ:
|
698 |
vscsi_process_login(s, req); |
699 |
break;
|
700 |
case SRP_TSK_MGMT:
|
701 |
done = vscsi_process_tsk_mgmt(s, req); |
702 |
break;
|
703 |
case SRP_CMD:
|
704 |
done = vscsi_queue_cmd(s, req); |
705 |
break;
|
706 |
case SRP_LOGIN_RSP:
|
707 |
case SRP_I_LOGOUT:
|
708 |
case SRP_T_LOGOUT:
|
709 |
case SRP_RSP:
|
710 |
case SRP_CRED_REQ:
|
711 |
case SRP_CRED_RSP:
|
712 |
case SRP_AER_REQ:
|
713 |
case SRP_AER_RSP:
|
714 |
fprintf(stderr, "VSCSI: Unsupported opcode %02x\n", opcode);
|
715 |
break;
|
716 |
default:
|
717 |
fprintf(stderr, "VSCSI: Unknown type %02x\n", opcode);
|
718 |
} |
719 |
|
720 |
return done;
|
721 |
} |
722 |
|
723 |
static int vscsi_send_adapter_info(VSCSIState *s, vscsi_req *req) |
724 |
{ |
725 |
struct viosrp_adapter_info *sinfo;
|
726 |
struct mad_adapter_info_data info;
|
727 |
int rc;
|
728 |
|
729 |
sinfo = &req->iu.mad.adapter_info; |
730 |
|
731 |
#if 0 /* What for ? */
|
732 |
rc = spapr_vio_dma_read(&s->vdev, be64_to_cpu(sinfo->buffer),
|
733 |
&info, be16_to_cpu(sinfo->common.length));
|
734 |
if (rc) {
|
735 |
fprintf(stderr, "vscsi_send_adapter_info: DMA read failure !\n");
|
736 |
}
|
737 |
#endif
|
738 |
memset(&info, 0, sizeof(info)); |
739 |
strcpy(info.srp_version, SRP_VERSION); |
740 |
memcpy(info.partition_name, "qemu", sizeof("qemu")); |
741 |
info.partition_number = cpu_to_be32(0);
|
742 |
info.mad_version = cpu_to_be32(1);
|
743 |
info.os_type = cpu_to_be32(2);
|
744 |
info.port_max_txu[0] = cpu_to_be32(VSCSI_MAX_SECTORS << 9); |
745 |
|
746 |
rc = spapr_vio_dma_write(&s->vdev, be64_to_cpu(sinfo->buffer), |
747 |
&info, be16_to_cpu(sinfo->common.length)); |
748 |
if (rc) {
|
749 |
fprintf(stderr, "vscsi_send_adapter_info: DMA write failure !\n");
|
750 |
} |
751 |
|
752 |
sinfo->common.status = rc ? cpu_to_be32(1) : 0; |
753 |
|
754 |
return vscsi_send_iu(s, req, sizeof(*sinfo), VIOSRP_MAD_FORMAT); |
755 |
} |
756 |
|
757 |
static int vscsi_handle_mad_req(VSCSIState *s, vscsi_req *req) |
758 |
{ |
759 |
union mad_iu *mad = &req->iu.mad;
|
760 |
|
761 |
switch (be32_to_cpu(mad->empty_iu.common.type)) {
|
762 |
case VIOSRP_EMPTY_IU_TYPE:
|
763 |
fprintf(stderr, "Unsupported EMPTY MAD IU\n");
|
764 |
break;
|
765 |
case VIOSRP_ERROR_LOG_TYPE:
|
766 |
fprintf(stderr, "Unsupported ERROR LOG MAD IU\n");
|
767 |
mad->error_log.common.status = cpu_to_be16(1);
|
768 |
vscsi_send_iu(s, req, sizeof(mad->error_log), VIOSRP_MAD_FORMAT);
|
769 |
break;
|
770 |
case VIOSRP_ADAPTER_INFO_TYPE:
|
771 |
vscsi_send_adapter_info(s, req); |
772 |
break;
|
773 |
case VIOSRP_HOST_CONFIG_TYPE:
|
774 |
mad->host_config.common.status = cpu_to_be16(1);
|
775 |
vscsi_send_iu(s, req, sizeof(mad->host_config), VIOSRP_MAD_FORMAT);
|
776 |
break;
|
777 |
default:
|
778 |
fprintf(stderr, "VSCSI: Unknown MAD type %02x\n",
|
779 |
be32_to_cpu(mad->empty_iu.common.type)); |
780 |
} |
781 |
|
782 |
return 1; |
783 |
} |
784 |
|
785 |
static void vscsi_got_payload(VSCSIState *s, vscsi_crq *crq) |
786 |
{ |
787 |
vscsi_req *req; |
788 |
int done;
|
789 |
|
790 |
req = vscsi_get_req(s); |
791 |
if (req == NULL) { |
792 |
fprintf(stderr, "VSCSI: Failed to get a request !\n");
|
793 |
return;
|
794 |
} |
795 |
|
796 |
/* We only support a limited number of descriptors, we know
|
797 |
* the ibmvscsi driver uses up to 10 max, so it should fit
|
798 |
* in our 256 bytes IUs. If not we'll have to increase the size
|
799 |
* of the structure.
|
800 |
*/
|
801 |
if (crq->s.IU_length > sizeof(union viosrp_iu)) { |
802 |
fprintf(stderr, "VSCSI: SRP IU too long (%d bytes) !\n",
|
803 |
crq->s.IU_length); |
804 |
vscsi_put_req(req); |
805 |
return;
|
806 |
} |
807 |
|
808 |
/* XXX Handle failure differently ? */
|
809 |
if (spapr_vio_dma_read(&s->vdev, crq->s.IU_data_ptr, &req->iu,
|
810 |
crq->s.IU_length)) { |
811 |
fprintf(stderr, "vscsi_got_payload: DMA read failure !\n");
|
812 |
vscsi_put_req(req); |
813 |
return;
|
814 |
} |
815 |
memcpy(&req->crq, crq, sizeof(vscsi_crq));
|
816 |
|
817 |
if (crq->s.format == VIOSRP_MAD_FORMAT) {
|
818 |
done = vscsi_handle_mad_req(s, req); |
819 |
} else {
|
820 |
done = vscsi_handle_srp_req(s, req); |
821 |
} |
822 |
|
823 |
if (done) {
|
824 |
vscsi_put_req(req); |
825 |
} |
826 |
} |
827 |
|
828 |
|
829 |
static int vscsi_do_crq(struct VIOsPAPRDevice *dev, uint8_t *crq_data) |
830 |
{ |
831 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev); |
832 |
vscsi_crq crq; |
833 |
|
834 |
memcpy(crq.raw, crq_data, 16);
|
835 |
crq.s.timeout = be16_to_cpu(crq.s.timeout); |
836 |
crq.s.IU_length = be16_to_cpu(crq.s.IU_length); |
837 |
crq.s.IU_data_ptr = be64_to_cpu(crq.s.IU_data_ptr); |
838 |
|
839 |
dprintf("VSCSI: do_crq %02x %02x ...\n", crq.raw[0], crq.raw[1]); |
840 |
|
841 |
switch (crq.s.valid) {
|
842 |
case 0xc0: /* Init command/response */ |
843 |
|
844 |
/* Respond to initialization request */
|
845 |
if (crq.s.format == 0x01) { |
846 |
memset(crq.raw, 0, 16); |
847 |
crq.s.valid = 0xc0;
|
848 |
crq.s.format = 0x02;
|
849 |
spapr_vio_send_crq(dev, crq.raw); |
850 |
} |
851 |
|
852 |
/* Note that in hotplug cases, we might get a 0x02
|
853 |
* as a result of us emitting the init request
|
854 |
*/
|
855 |
|
856 |
break;
|
857 |
case 0xff: /* Link event */ |
858 |
|
859 |
/* Not handled for now */
|
860 |
|
861 |
break;
|
862 |
case 0x80: /* Payloads */ |
863 |
switch (crq.s.format) {
|
864 |
case VIOSRP_SRP_FORMAT: /* AKA VSCSI request */ |
865 |
case VIOSRP_MAD_FORMAT: /* AKA VSCSI response */ |
866 |
vscsi_got_payload(s, &crq); |
867 |
break;
|
868 |
case VIOSRP_OS400_FORMAT:
|
869 |
case VIOSRP_AIX_FORMAT:
|
870 |
case VIOSRP_LINUX_FORMAT:
|
871 |
case VIOSRP_INLINE_FORMAT:
|
872 |
fprintf(stderr, "vscsi_do_srq: Unsupported payload format %02x\n",
|
873 |
crq.s.format); |
874 |
break;
|
875 |
default:
|
876 |
fprintf(stderr, "vscsi_do_srq: Unknown payload format %02x\n",
|
877 |
crq.s.format); |
878 |
} |
879 |
break;
|
880 |
default:
|
881 |
fprintf(stderr, "vscsi_do_crq: unknown CRQ %02x %02x ...\n",
|
882 |
crq.raw[0], crq.raw[1]); |
883 |
}; |
884 |
|
885 |
return 0; |
886 |
} |
887 |
|
888 |
static const struct SCSIBusInfo vscsi_scsi_info = { |
889 |
.tcq = true,
|
890 |
.max_channel = 7, /* logical unit addressing format */ |
891 |
.max_target = 63,
|
892 |
.max_lun = 31,
|
893 |
|
894 |
.transfer_data = vscsi_transfer_data, |
895 |
.complete = vscsi_command_complete, |
896 |
.cancel = vscsi_request_cancelled |
897 |
}; |
898 |
|
899 |
static void spapr_vscsi_reset(VIOsPAPRDevice *dev) |
900 |
{ |
901 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev); |
902 |
int i;
|
903 |
|
904 |
memset(s->reqs, 0, sizeof(s->reqs)); |
905 |
for (i = 0; i < VSCSI_REQ_LIMIT; i++) { |
906 |
s->reqs[i].qtag = i; |
907 |
} |
908 |
} |
909 |
|
910 |
static int spapr_vscsi_init(VIOsPAPRDevice *dev) |
911 |
{ |
912 |
VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev); |
913 |
|
914 |
dev->crq.SendFunc = vscsi_do_crq; |
915 |
|
916 |
scsi_bus_new(&s->bus, &dev->qdev, &vscsi_scsi_info); |
917 |
if (!dev->qdev.hotplugged) {
|
918 |
scsi_bus_legacy_handle_cmdline(&s->bus); |
919 |
} |
920 |
|
921 |
return 0; |
922 |
} |
923 |
|
924 |
void spapr_vscsi_create(VIOsPAPRBus *bus)
|
925 |
{ |
926 |
DeviceState *dev; |
927 |
|
928 |
dev = qdev_create(&bus->bus, "spapr-vscsi");
|
929 |
|
930 |
qdev_init_nofail(dev); |
931 |
} |
932 |
|
933 |
static int spapr_vscsi_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off) |
934 |
{ |
935 |
int ret;
|
936 |
|
937 |
ret = fdt_setprop_cell(fdt, node_off, "#address-cells", 2); |
938 |
if (ret < 0) { |
939 |
return ret;
|
940 |
} |
941 |
|
942 |
ret = fdt_setprop_cell(fdt, node_off, "#size-cells", 0); |
943 |
if (ret < 0) { |
944 |
return ret;
|
945 |
} |
946 |
|
947 |
return 0; |
948 |
} |
949 |
|
950 |
static Property spapr_vscsi_properties[] = {
|
951 |
DEFINE_SPAPR_PROPERTIES(VSCSIState, vdev), |
952 |
DEFINE_PROP_END_OF_LIST(), |
953 |
}; |
954 |
|
955 |
static void spapr_vscsi_class_init(ObjectClass *klass, void *data) |
956 |
{ |
957 |
DeviceClass *dc = DEVICE_CLASS(klass); |
958 |
VIOsPAPRDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass); |
959 |
|
960 |
k->init = spapr_vscsi_init; |
961 |
k->reset = spapr_vscsi_reset; |
962 |
k->devnode = spapr_vscsi_devnode; |
963 |
k->dt_name = "v-scsi";
|
964 |
k->dt_type = "vscsi";
|
965 |
k->dt_compatible = "IBM,v-scsi";
|
966 |
k->signal_mask = 0x00000001;
|
967 |
dc->props = spapr_vscsi_properties; |
968 |
k->rtce_window_size = 0x10000000;
|
969 |
} |
970 |
|
971 |
static TypeInfo spapr_vscsi_info = {
|
972 |
.name = "spapr-vscsi",
|
973 |
.parent = TYPE_VIO_SPAPR_DEVICE, |
974 |
.instance_size = sizeof(VSCSIState),
|
975 |
.class_init = spapr_vscsi_class_init, |
976 |
}; |
977 |
|
978 |
static void spapr_vscsi_register_types(void) |
979 |
{ |
980 |
type_register_static(&spapr_vscsi_info); |
981 |
} |
982 |
|
983 |
type_init(spapr_vscsi_register_types) |