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[Qemu-devel] [PATCH 24/27] Implement PAPR virtual SCSI interface (ibmvsc
|
From: |
David Gibson |
|
Subject: |
[Qemu-devel] [PATCH 24/27] Implement PAPR virtual SCSI interface (ibmvscsi) |
|
Date: |
Wed, 23 Mar 2011 16:30:44 +1100 |
From: Ben Herrenschmidt <address@hidden>
This patch implements the infrastructure and hypercalls necessary for
the PAPR specified Virtual SCSI interface. This is the normal method
for providing (virtual) disks to PAPR partitions.
Signed-off-by: Ben Herrenschmidt <address@hidden>
Signed-off-by: David Gibson <address@hidden>
---
Makefile.target | 2 +-
hw/ppc-viosrp.h | 216 ++++++++++++
hw/spapr.c | 11 +-
hw/spapr_vio.h | 3 +
hw/spapr_vscsi.c | 988 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
hw/srp.h | 240 +++++++++++++
6 files changed, 1458 insertions(+), 2 deletions(-)
create mode 100644 hw/ppc-viosrp.h
create mode 100644 hw/spapr_vscsi.c
create mode 100644 hw/srp.h
diff --git a/Makefile.target b/Makefile.target
index 58b7a49..f0696ce 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -233,7 +233,7 @@ obj-ppc-y += ppc_oldworld.o
obj-ppc-y += ppc_newworld.o
# IBM pSeries (sPAPR)
obj-ppc-y += spapr.o spapr_hcall.o spapr_rtas.o spapr_vio.o
-obj-ppc-y += xics.o spapr_vty.o spapr_llan.o
+obj-ppc-y += xics.o spapr_vty.o spapr_llan.o spapr_vscsi.o
# PowerPC 4xx boards
obj-ppc-y += ppc4xx_devs.o ppc4xx_pci.o ppc405_uc.o ppc405_boards.o
obj-ppc-y += ppc440.o ppc440_bamboo.o
diff --git a/hw/ppc-viosrp.h b/hw/ppc-viosrp.h
new file mode 100644
index 0000000..d8e365d
--- /dev/null
+++ b/hw/ppc-viosrp.h
@@ -0,0 +1,216 @@
+/*****************************************************************************/
+/* srp.h -- SCSI RDMA Protocol definitions */
+/* */
+/* Written By: Colin Devilbis, IBM Corporation */
+/* */
+/* Copyright (C) 2003 IBM Corporation */
+/* */
+/* This program is free software; you can redistribute it and/or modify */
+/* it under the terms of the GNU General Public License as published by */
+/* the Free Software Foundation; either version 2 of the License, or */
+/* (at your option) any later version. */
+/* */
+/* This program is distributed in the hope that it will be useful, */
+/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
+/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
+/* GNU General Public License for more details. */
+/* */
+/* You should have received a copy of the GNU General Public License */
+/* along with this program; if not, write to the Free Software */
+/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
+/* */
+/* */
+/* This file contains structures and definitions for IBM RPA (RS/6000 */
+/* platform architecture) implementation of the SRP (SCSI RDMA Protocol) */
+/* standard. SRP is used on IBM iSeries and pSeries platforms to send SCSI */
+/* commands between logical partitions. */
+/* */
+/* SRP Information Units (IUs) are sent on a "Command/Response Queue" (CRQ) */
+/* between partitions. The definitions in this file are architected, */
+/* and cannot be changed without breaking compatibility with other versions */
+/* of Linux and other operating systems (AIX, OS/400) that talk this protocol*/
+/* between logical partitions */
+/*****************************************************************************/
+#ifndef PPC_VIOSRP_H
+#define PPC_VIOSRP_H
+
+#define SRP_VERSION "16.a"
+#define SRP_MAX_IU_LEN 256
+#define SRP_MAX_LOC_LEN 32
+
+union srp_iu {
+ struct srp_login_req login_req;
+ struct srp_login_rsp login_rsp;
+ struct srp_login_rej login_rej;
+ struct srp_i_logout i_logout;
+ struct srp_t_logout t_logout;
+ struct srp_tsk_mgmt tsk_mgmt;
+ struct srp_cmd cmd;
+ struct srp_rsp rsp;
+ uint8_t reserved[SRP_MAX_IU_LEN];
+};
+
+enum viosrp_crq_formats {
+ VIOSRP_SRP_FORMAT = 0x01,
+ VIOSRP_MAD_FORMAT = 0x02,
+ VIOSRP_OS400_FORMAT = 0x03,
+ VIOSRP_AIX_FORMAT = 0x04,
+ VIOSRP_LINUX_FORMAT = 0x06,
+ VIOSRP_INLINE_FORMAT = 0x07
+};
+
+enum viosrp_crq_status {
+ VIOSRP_OK = 0x0,
+ VIOSRP_NONRECOVERABLE_ERR = 0x1,
+ VIOSRP_VIOLATES_MAX_XFER = 0x2,
+ VIOSRP_PARTNER_PANIC = 0x3,
+ VIOSRP_DEVICE_BUSY = 0x8,
+ VIOSRP_ADAPTER_FAIL = 0x10,
+ VIOSRP_OK2 = 0x99,
+};
+
+struct viosrp_crq {
+ uint8_t valid; /* used by RPA */
+ uint8_t format; /* SCSI vs out-of-band */
+ uint8_t reserved;
+ uint8_t status; /* non-scsi failure? (e.g. DMA failure) */
+ uint16_t timeout; /* in seconds */
+ uint16_t IU_length; /* in bytes */
+ uint64_t IU_data_ptr; /* the TCE for transferring data */
+};
+
+/* MADs are Management requests above and beyond the IUs defined in the SRP
+ * standard.
+ */
+enum viosrp_mad_types {
+ VIOSRP_EMPTY_IU_TYPE = 0x01,
+ VIOSRP_ERROR_LOG_TYPE = 0x02,
+ VIOSRP_ADAPTER_INFO_TYPE = 0x03,
+ VIOSRP_HOST_CONFIG_TYPE = 0x04,
+ VIOSRP_CAPABILITIES_TYPE = 0x05,
+ VIOSRP_ENABLE_FAST_FAIL = 0x08,
+};
+
+enum viosrp_mad_status {
+ VIOSRP_MAD_SUCCESS = 0x00,
+ VIOSRP_MAD_NOT_SUPPORTED = 0xF1,
+ VIOSRP_MAD_FAILED = 0xF7,
+};
+
+enum viosrp_capability_type {
+ MIGRATION_CAPABILITIES = 0x01,
+ RESERVATION_CAPABILITIES = 0x02,
+};
+
+enum viosrp_capability_support {
+ SERVER_DOES_NOT_SUPPORTS_CAP = 0x0,
+ SERVER_SUPPORTS_CAP = 0x01,
+ SERVER_CAP_DATA = 0x02,
+};
+
+enum viosrp_reserve_type {
+ CLIENT_RESERVE_SCSI_2 = 0x01,
+};
+
+enum viosrp_capability_flag {
+ CLIENT_MIGRATED = 0x01,
+ CLIENT_RECONNECT = 0x02,
+ CAP_LIST_SUPPORTED = 0x04,
+ CAP_LIST_DATA = 0x08,
+};
+
+/*
+ * Common MAD header
+ */
+struct mad_common {
+ uint32_t type;
+ uint16_t status;
+ uint16_t length;
+ uint64_t tag;
+};
+
+/*
+ * All SRP (and MAD) requests normally flow from the
+ * client to the server. There is no way for the server to send
+ * an asynchronous message back to the client. The Empty IU is used
+ * to hang out a meaningless request to the server so that it can respond
+ * asynchrouously with something like a SCSI AER
+ */
+struct viosrp_empty_iu {
+ struct mad_common common;
+ uint64_t buffer;
+ uint32_t port;
+};
+
+struct viosrp_error_log {
+ struct mad_common common;
+ uint64_t buffer;
+};
+
+struct viosrp_adapter_info {
+ struct mad_common common;
+ uint64_t buffer;
+};
+
+struct viosrp_host_config {
+ struct mad_common common;
+ uint64_t buffer;
+};
+
+struct viosrp_fast_fail {
+ struct mad_common common;
+};
+
+struct viosrp_capabilities {
+ struct mad_common common;
+ uint64_t buffer;
+};
+
+struct mad_capability_common {
+ uint32_t cap_type;
+ uint16_t length;
+ uint16_t server_support;
+};
+
+struct mad_reserve_cap {
+ struct mad_capability_common common;
+ uint32_t type;
+};
+
+struct mad_migration_cap {
+ struct mad_capability_common common;
+ uint32_t ecl;
+};
+
+struct capabilities {
+ uint32_t flags;
+ char name[SRP_MAX_LOC_LEN];
+ char loc[SRP_MAX_LOC_LEN];
+ struct mad_migration_cap migration;
+ struct mad_reserve_cap reserve;
+};
+
+union mad_iu {
+ struct viosrp_empty_iu empty_iu;
+ struct viosrp_error_log error_log;
+ struct viosrp_adapter_info adapter_info;
+ struct viosrp_host_config host_config;
+ struct viosrp_fast_fail fast_fail;
+ struct viosrp_capabilities capabilities;
+};
+
+union viosrp_iu {
+ union srp_iu srp;
+ union mad_iu mad;
+};
+
+struct mad_adapter_info_data {
+ char srp_version[8];
+ char partition_name[96];
+ uint32_t partition_number;
+ uint32_t mad_version;
+ uint32_t os_type;
+ uint32_t port_max_txu[8]; /* per-port maximum transfer */
+};
+
+#endif
diff --git a/hw/spapr.c b/hw/spapr.c
index 3d161db..8585520 100644
--- a/hw/spapr.c
+++ b/hw/spapr.c
@@ -28,6 +28,7 @@
#include "hw.h"
#include "elf.h"
#include "net.h"
+#include "blockdev.h"
#include "hw/boards.h"
#include "hw/ppc.h"
@@ -323,7 +324,8 @@ static void ppc_spapr_init(ram_addr_t ram_size,
qemu_free(filename);
/* Set up Interrupt Controller */
- spapr->icp = xics_system_init(smp_cpus, envs, MAX_SERIAL_PORTS + nb_nics);
+ spapr->icp = xics_system_init(smp_cpus, envs, MAX_SERIAL_PORTS + nb_nics +
+ drive_get_max_bus(IF_SCSI) + 1);
/* Set up VIO bus */
spapr->vio_bus = spapr_vio_bus_init();
@@ -353,6 +355,12 @@ static void ppc_spapr_init(ram_addr_t ram_size,
}
}
+ for (i = 0; i <= drive_get_max_bus(IF_SCSI); i++) {
+ spapr_vscsi_create(spapr->vio_bus, 0x2000 + i,
+ xics_find_qirq(spapr->icp, irq), irq);
+ irq++;
+ }
+
if (kernel_filename) {
uint64_t lowaddr = 0;
@@ -413,6 +421,7 @@ static QEMUMachine spapr_machine = {
.max_cpus = MAX_CPUS,
.no_vga = 1,
.no_parallel = 1,
+ .use_scsi = 1,
};
static void spapr_machine_init(void)
diff --git a/hw/spapr_vio.h b/hw/spapr_vio.h
index ba16795..b7d0daa 100644
--- a/hw/spapr_vio.h
+++ b/hw/spapr_vio.h
@@ -101,4 +101,7 @@ void spapr_vty_create(VIOsPAPRBus *bus,
void spapr_vlan_create(VIOsPAPRBus *bus, uint32_t reg, NICInfo *nd,
qemu_irq qirq, uint32_t vio_irq_num);
+void spapr_vscsi_create(VIOsPAPRBus *bus, uint32_t reg,
+ qemu_irq qirq, uint32_t vio_irq_num);
+
#endif /* _HW_SPAPR_VIO_H */
diff --git a/hw/spapr_vscsi.c b/hw/spapr_vscsi.c
new file mode 100644
index 0000000..e142dae
--- /dev/null
+++ b/hw/spapr_vscsi.c
@@ -0,0 +1,988 @@
+/*
+ * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
+ *
+ * PAPR Virtual SCSI, aka ibmvscsi
+ *
+ * Copyright (c) 2010,2011 Benjamin Herrenschmidt, IBM Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * TODO:
+ *
+ * - Cleanups :-)
+ * - Sort out better how to assign devices to VSCSI instances
+ * - Fix residual counts
+ * - Add indirect descriptors support
+ * - Maybe do autosense (PAPR seems to mandate it, linux doesn't care)
+ */
+#include "hw.h"
+#include "scsi.h"
+#include "scsi-defs.h"
+#include "net.h" /* Remove that when we can */
+#include "srp.h"
+#include "hw/qdev.h"
+#include "hw/spapr.h"
+#include "hw/spapr_vio.h"
+#include "hw/ppc-viosrp.h"
+
+#include <libfdt.h>
+
+/*#define DEBUG_VSCSI*/
+
+#ifdef DEBUG_VSCSI
+#define dprintf(fmt, ...) \
+ do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
+#else
+#define dprintf(fmt, ...) \
+ do { } while (0)
+#endif
+
+/*
+ * Virtual SCSI device
+ */
+
+/* Random numbers */
+#define VSCSI_MAX_SECTORS 4096
+#define VSCSI_REQ_LIMIT 24
+
+#define SCSI_SENSE_BUF_SIZE 96
+#define SRP_RSP_SENSE_DATA_LEN 18
+
+typedef union vscsi_crq {
+ struct viosrp_crq s;
+ uint8_t raw[16];
+} vscsi_crq;
+
+typedef struct vscsi_req {
+ vscsi_crq crq;
+ union viosrp_iu iu;
+
+ /* SCSI request tracking */
+ SCSIDevice *sdev;
+ uint32_t qtag; /* qemu tag != srp tag */
+ int lun;
+ int active;
+ long data_len;
+ int writing;
+ int sensing;
+ int senselen;
+ uint8_t sense[SCSI_SENSE_BUF_SIZE];
+
+ /* RDMA related bits */
+ uint8_t dma_fmt;
+ struct srp_direct_buf ext_desc;
+ struct srp_direct_buf *cur_desc;
+ struct srp_indirect_buf *ind_desc;
+ int local_desc;
+ int total_desc;
+} vscsi_req;
+
+
+typedef struct {
+ VIOsPAPRDevice vdev;
+ SCSIBus bus;
+ vscsi_req reqs[VSCSI_REQ_LIMIT];
+} VSCSIState;
+
+/* XXX Debug only */
+static VSCSIState *dbg_vscsi_state;
+
+
+static struct vscsi_req *vscsi_get_req(VSCSIState *s)
+{
+ vscsi_req *req;
+ int i;
+
+ for (i = 0; i < VSCSI_REQ_LIMIT; i++) {
+ req = &s->reqs[i];
+ if (!req->active) {
+ memset(req, 0, sizeof(*req));
+ req->qtag = i;
+ req->active = 1;
+ return req;
+ }
+ }
+ return NULL;
+}
+
+static void vscsi_put_req(VSCSIState *s, vscsi_req *req)
+{
+ req->active = 0;
+}
+
+static vscsi_req *vscsi_find_req(VSCSIState *s, uint32_t tag)
+{
+ if (tag >= VSCSI_REQ_LIMIT || !s->reqs[tag].active) {
+ return NULL;
+ }
+ return &s->reqs[tag];
+}
+
+static void vscsi_decode_id_lun(uint64_t srp_lun, int *id, int *lun)
+{
+ /* XXX Figure that one out properly ! This is crackpot */
+ *id = (srp_lun >> 56) & 0x7f;
+ *lun = (srp_lun >> 48) & 0xff;
+}
+
+static int vscsi_send_iu(VSCSIState *s, vscsi_req *req,
+ uint64_t length, uint8_t format)
+{
+ long rc, rc1;
+
+ /* First copy the SRP */
+ rc = spapr_tce_dma_write(&s->vdev, req->crq.s.IU_data_ptr,
+ &req->iu, length);
+ if (rc) {
+ fprintf(stderr, "vscsi_send_iu: DMA write failure !\n");
+ }
+
+ req->crq.s.valid = 0x80;
+ req->crq.s.format = format;
+ req->crq.s.reserved = 0x00;
+ req->crq.s.timeout = cpu_to_be16(0x0000);
+ req->crq.s.IU_length = cpu_to_be16(length);
+ req->crq.s.IU_data_ptr = req->iu.srp.rsp.tag; /* right byte order */
+
+ if (rc == 0) {
+ req->crq.s.status = 0x99; /* Just needs to be non-zero */
+ } else {
+ req->crq.s.status = 0x00;
+ }
+
+ rc1 = spapr_vio_send_crq(&s->vdev, req->crq.raw);
+ if (rc1) {
+ fprintf(stderr, "vscsi_send_iu: Error sending response\n");
+ return rc1;
+ }
+
+ return rc;
+}
+
+static void vscsi_makeup_sense(VSCSIState *s, vscsi_req *req,
+ uint8_t key, uint8_t asc, uint8_t ascq)
+{
+ req->senselen = SRP_RSP_SENSE_DATA_LEN;
+
+ /* Valid bit and 'current errors' */
+ req->sense[0] = (0x1 << 7 | 0x70);
+ /* Sense key */
+ req->sense[2] = key;
+ /* Additional sense length */
+ req->sense[7] = 0xa; /* 10 bytes */
+ /* Additional sense code */
+ req->sense[12] = asc;
+ req->sense[13] = ascq;
+}
+
+static int vscsi_send_rsp(VSCSIState *s, vscsi_req *req,
+ uint8_t status, int32_t res_in, int32_t res_out)
+{
+ union viosrp_iu *iu = &req->iu;
+ uint64_t tag = iu->srp.rsp.tag;
+ int total_len = sizeof(iu->srp.rsp);
+
+ dprintf("VSCSI: Sending resp status: 0x%x, "
+ "res_in: %d, res_out: %d\n", status, res_in, res_out);
+
+ memset(iu, 0, sizeof(struct srp_rsp));
+ iu->srp.rsp.opcode = SRP_RSP;
+ iu->srp.rsp.req_lim_delta = cpu_to_be32(1);
+ iu->srp.rsp.tag = tag;
+
+ /* Handle residuals */
+ if (res_in < 0) {
+ iu->srp.rsp.flags |= SRP_RSP_FLAG_DIUNDER;
+ res_in = -res_in;
+ } else if (res_in) {
+ iu->srp.rsp.flags |= SRP_RSP_FLAG_DIOVER;
+ }
+ if (res_out < 0) {
+ iu->srp.rsp.flags |= SRP_RSP_FLAG_DOUNDER;
+ res_out = -res_out;
+ } else if (res_out) {
+ iu->srp.rsp.flags |= SRP_RSP_FLAG_DOOVER;
+ }
+ iu->srp.rsp.data_in_res_cnt = cpu_to_be32(res_in);
+ iu->srp.rsp.data_out_res_cnt = cpu_to_be32(res_out);
+
+ /* We don't do response data */
+ /* iu->srp.rsp.flags &= ~SRP_RSP_FLAG_RSPVALID; */
+ iu->srp.rsp.resp_data_len = cpu_to_be32(0);
+
+ /* Handle success vs. failure */
+ iu->srp.rsp.status = status;
+ if (status) {
+ iu->srp.rsp.sol_not = (iu->srp.cmd.sol_not & 0x04) >> 2;
+ if (req->senselen) {
+ req->iu.srp.rsp.flags |= SRP_RSP_FLAG_SNSVALID;
+ req->iu.srp.rsp.sense_data_len = cpu_to_be32(req->senselen);
+ memcpy(req->iu.srp.rsp.data, req->sense, req->senselen);
+ total_len += req->senselen;
+ }
+ } else {
+ iu->srp.rsp.sol_not = (iu->srp.cmd.sol_not & 0x02) >> 1;
+ }
+
+ vscsi_send_iu(s, req, total_len, VIOSRP_SRP_FORMAT);
+ return 0;
+}
+
+static inline void vscsi_swap_desc(struct srp_direct_buf *desc)
+{
+ desc->va = be64_to_cpu(desc->va);
+ desc->len = be32_to_cpu(desc->len);
+}
+
+static int vscsi_srp_direct_data(VSCSIState *s, vscsi_req *req,
+ uint8_t *buf, uint32_t len)
+{
+ struct srp_direct_buf *md = req->cur_desc;
+ uint32_t llen;
+ int rc;
+
+ dprintf("VSCSI: direct segment 0x%x bytes, va=0x%llx desc len=0x%x\n",
+ len, (unsigned long long)md->va, md->len);
+
+ llen = MIN(len, md->len);
+ if (llen) {
+ if (req->writing) { /* writing = to device = reading from memory */
+ rc = spapr_tce_dma_read(&s->vdev, md->va, buf, llen);
+ } else {
+ rc = spapr_tce_dma_write(&s->vdev, md->va, buf, llen);
+ }
+ }
+ md->len -= llen;
+ md->va += llen;
+
+ if (rc) {
+ return -1;
+ }
+ return llen;
+}
+
+static int vscsi_srp_indirect_data(VSCSIState *s, vscsi_req *req,
+ uint8_t *buf, uint32_t len)
+{
+ struct srp_direct_buf *td = &req->ind_desc->table_desc;
+ struct srp_direct_buf *md = req->cur_desc;
+ int rc = 0;
+ uint32_t llen, total = 0;
+
+ dprintf("VSCSI: indirect segment 0x%x bytes, td va=0x%llx len=0x%x\n",
+ len, (unsigned long long)td->va, td->len);
+
+ /* While we have data ... */
+ while (len) {
+ /* If we have a descriptor but it's empty, go fetch a new one */
+ if (md && md->len == 0) {
+ /* More local available, use one */
+ if (req->local_desc) {
+ md = ++req->cur_desc;
+ --req->local_desc;
+ --req->total_desc;
+ td->va += sizeof(struct srp_direct_buf);
+ } else {
+ md = req->cur_desc = NULL;
+ }
+ }
+ /* No descriptor at hand, fetch one */
+ if (!md) {
+ if (!req->total_desc) {
+ dprintf("VSCSI: Out of descriptors !\n");
+ break;
+ }
+ md = req->cur_desc = &req->ext_desc;
+ dprintf("VSCSI: Reading desc from 0x%llx\n",
+ (unsigned long long)td->va);
+ rc = spapr_tce_dma_read(&s->vdev, td->va, md,
+ sizeof(struct srp_direct_buf));
+ if (rc) {
+ dprintf("VSCSI: tce_dma_read -> %d reading ext_desc\n", rc);
+ break;
+ }
+ vscsi_swap_desc(md);
+ td->va += sizeof(struct srp_direct_buf);
+ --req->total_desc;
+ }
+ dprintf("VSCSI: [desc va=0x%llx,len=0x%x] remaining=0x%x\n",
+ (unsigned long long)md->va, md->len, len);
+
+ /* Perform transfer */
+ llen = MIN(len, md->len);
+ if (req->writing) { /* writing = to device = reading from memory */
+ rc = spapr_tce_dma_read(&s->vdev, md->va, buf, llen);
+ } else {
+ rc = spapr_tce_dma_write(&s->vdev, md->va, buf, llen);
+ }
+ if (rc) {
+ dprintf("VSCSI: tce_dma_r/w(%d) -> %d\n", req->writing, rc);
+ break;
+ }
+ dprintf("VSCSI: data: %02x %02x %02x %02x...\n",
+ buf[0], buf[1], buf[2], buf[3]);
+
+ len -= llen;
+ buf += llen;
+ total += llen;
+ md->va += llen;
+ md->len -= llen;
+ }
+ return rc ? -1 : total;
+}
+
+static int vscsi_srp_transfer_data(VSCSIState *s, vscsi_req *req,
+ int writing, uint8_t *buf, uint32_t len)
+{
+ int err = 0;
+
+ switch (req->dma_fmt) {
+ case SRP_NO_DATA_DESC:
+ dprintf("VSCSI: no data desc transfer, skipping 0x%x bytes\n", len);
+ break;
+ case SRP_DATA_DESC_DIRECT:
+ err = vscsi_srp_direct_data(s, req, buf, len);
+ break;
+ case SRP_DATA_DESC_INDIRECT:
+ err = vscsi_srp_indirect_data(s, req, buf, len);
+ break;
+ }
+ return err;
+}
+
+/* Bits from linux srp */
+static int data_out_desc_size(struct srp_cmd *cmd)
+{
+ int size = 0;
+ uint8_t fmt = cmd->buf_fmt >> 4;
+
+ switch (fmt) {
+ case SRP_NO_DATA_DESC:
+ break;
+ case SRP_DATA_DESC_DIRECT:
+ size = sizeof(struct srp_direct_buf);
+ break;
+ case SRP_DATA_DESC_INDIRECT:
+ size = sizeof(struct srp_indirect_buf) +
+ sizeof(struct srp_direct_buf)*cmd->data_out_desc_cnt;
+ break;
+ default:
+ break;
+ }
+ return size;
+}
+
+static int vscsi_preprocess_desc(vscsi_req *req)
+{
+ struct srp_cmd *cmd = &req->iu.srp.cmd;
+ int offset, i;
+
+ offset = cmd->add_cdb_len & ~3;
+
+ if (req->writing) {
+ req->dma_fmt = cmd->buf_fmt >> 4;
+ } else {
+ offset += data_out_desc_size(cmd);
+ req->dma_fmt = cmd->buf_fmt & ((1U << 4) - 1);
+ }
+
+ switch (req->dma_fmt) {
+ case SRP_NO_DATA_DESC:
+ break;
+ case SRP_DATA_DESC_DIRECT:
+ req->cur_desc = (struct srp_direct_buf *)(cmd->add_data + offset);
+ req->total_desc = req->local_desc = 1;
+ vscsi_swap_desc(req->cur_desc);
+ dprintf("VSCSI: using direct RDMA %s, 0x%x bytes MD: 0x%llx\n",
+ req->writing ? "write" : "read",
+ req->cur_desc->len, (unsigned long long)req->cur_desc->va);
+ break;
+ case SRP_DATA_DESC_INDIRECT:
+ req->ind_desc = (struct srp_indirect_buf *)(cmd->add_data + offset);
+ vscsi_swap_desc(&req->ind_desc->table_desc);
+ req->total_desc = req->ind_desc->table_desc.len /
+ sizeof(struct srp_direct_buf);
+ req->local_desc = req->writing ? cmd->data_out_desc_cnt :
+ cmd->data_in_desc_cnt;
+ for (i = 0; i < req->local_desc; i++) {
+ vscsi_swap_desc(&req->ind_desc->desc_list[i]);
+ }
+ req->cur_desc = req->local_desc ? &req->ind_desc->desc_list[0] : NULL;
+ dprintf("VSCSI: using indirect RDMA %s, 0x%x bytes %d descs "
+ "(%d local) VA: 0x%llx\n",
+ req->writing ? "read" : "write",
+ be32_to_cpu(req->ind_desc->len),
+ req->total_desc, req->local_desc,
+ (unsigned long long)req->ind_desc->table_desc.va);
+ break;
+ default:
+ fprintf(stderr,
+ "vscsi_preprocess_desc: Unknown format %x\n", req->dma_fmt);
+ return -1;
+ }
+
+ return 0;
+}
+
+static void vscsi_send_request_sense(VSCSIState *s, vscsi_req *req)
+{
+ SCSIDevice *sdev = req->sdev;
+ uint8_t *cdb = req->iu.srp.cmd.cdb;
+ int n;
+
+ cdb[0] = 3;
+ cdb[1] = 0;
+ cdb[2] = 0;
+ cdb[3] = 0;
+ cdb[4] = 96;
+ cdb[5] = 0;
+ req->sensing = 1;
+ n = sdev->info->send_command(sdev, req->qtag, cdb, req->lun);
+ dprintf("VSCSI: Queued request sense tag 0x%x\n", req->qtag);
+ if (n < 0) {
+ fprintf(stderr, "VSCSI: REQUEST_SENSE wants write data !?!?!?\n");
+ sdev->info->cancel_io(sdev, req->qtag);
+ vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0);
+ vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
+ vscsi_put_req(s, req);
+ return;
+ } else if (n == 0) {
+ return;
+ }
+ sdev->info->read_data(sdev, req->qtag);
+}
+
+/* Callback to indicate that the SCSI layer has completed a transfer. */
+static void vscsi_command_complete(SCSIBus *bus, int reason, uint32_t tag,
+ uint32_t arg)
+{
+ VSCSIState *s = DO_UPCAST(VSCSIState, vdev.qdev, bus->qbus.parent);
+ vscsi_req *req = vscsi_find_req(s, tag);
+ SCSIDevice *sdev;
+ uint8_t *buf;
+ int32_t res_in = 0, res_out = 0;
+ int len, rc = 0;
+
+ dprintf("VSCSI: SCSI cmd complete, r=0x%x tag=0x%x arg=0x%x, req=%p\n",
+ reason, tag, arg, req);
+ if (req == NULL) {
+ fprintf(stderr, "VSCSI: Can't find request for tag 0x%x\n", tag);
+ return;
+ }
+ sdev = req->sdev;
+
+ if (req->sensing) {
+ if (reason == SCSI_REASON_DONE) {
+ dprintf("VSCSI: Sense done !\n");
+ vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
+ vscsi_put_req(s, req);
+ } else {
+ uint8_t *buf = sdev->info->get_buf(sdev, tag);
+
+ len = MIN(arg, SCSI_SENSE_BUF_SIZE);
+ dprintf("VSCSI: Sense data, %d bytes:\n", len);
+ dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
+ buf[0], buf[1], buf[2], buf[3],
+ buf[4], buf[5], buf[6], buf[7]);
+ dprintf(" %02x %02x %02x %02x %02x %02x %02x %02x\n",
+ buf[8], buf[9], buf[10], buf[11],
+ buf[12], buf[13], buf[14], buf[15]);
+ memcpy(req->sense, buf, len);
+ req->senselen = len;
+ sdev->info->read_data(sdev, req->qtag);
+ }
+ return;
+ }
+
+ if (reason == SCSI_REASON_DONE) {
+ dprintf("VSCSI: Command complete err=%d\n", arg);
+ if (arg == 0) {
+ /* We handle overflows, not underflows for normal commands,
+ * but hopefully nobody cares
+ */
+ if (req->writing) {
+ res_out = req->data_len;
+ } else {
+ res_in = req->data_len;
+ }
+ vscsi_send_rsp(s, req, 0, res_in, res_out);
+ } else if (arg == CHECK_CONDITION) {
+ dprintf("VSCSI: Got CHECK_CONDITION, requesting sense...\n");
+ vscsi_send_request_sense(s, req);
+ return;
+ } else {
+ vscsi_send_rsp(s, req, arg, 0, 0);
+ }
+ vscsi_put_req(s, req);
+ return;
+ }
+
+ /* "arg" is how much we have read for reads and how much we want
+ * to write for writes (ie, how much is to be DMA'd)
+ */
+ if (arg) {
+ buf = sdev->info->get_buf(sdev, tag);
+ rc = vscsi_srp_transfer_data(s, req, req->writing, buf, arg);
+ }
+ if (rc < 0) {
+ fprintf(stderr, "VSCSI: RDMA error rc=%d!\n", rc);
+ sdev->info->cancel_io(sdev, req->qtag);
+ vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0);
+ vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
+ vscsi_put_req(s, req);
+ return;
+ }
+
+ /* Start next chunk */
+ req->data_len -= rc;
+ if (req->writing) {
+ sdev->info->write_data(sdev, req->qtag);
+ } else {
+ sdev->info->read_data(sdev, req->qtag);
+ }
+}
+
+static void vscsi_process_login(VSCSIState *s, vscsi_req *req)
+{
+ union viosrp_iu *iu = &req->iu;
+ struct srp_login_rsp *rsp = &iu->srp.login_rsp;
+ uint64_t tag = iu->srp.rsp.tag;
+
+ dprintf("VSCSI: Got login, sendin response !\n");
+
+ /* TODO handle case that requested size is wrong and
+ * buffer format is wrong
+ */
+ memset(iu, 0, sizeof(struct srp_login_rsp));
+ rsp->opcode = SRP_LOGIN_RSP;
+ /* Don't advertise quite as many request as we support to
+ * keep room for management stuff etc...
+ */
+ rsp->req_lim_delta = cpu_to_be32(VSCSI_REQ_LIMIT-2);
+ rsp->tag = tag;
+ rsp->max_it_iu_len = cpu_to_be32(sizeof(union srp_iu));
+ rsp->max_ti_iu_len = cpu_to_be32(sizeof(union srp_iu));
+ /* direct and indirect */
+ rsp->buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT |
SRP_BUF_FORMAT_INDIRECT);
+
+ vscsi_send_iu(s, req, sizeof(*rsp), VIOSRP_SRP_FORMAT);
+}
+
+static void vscsi_inquiry_no_target(VSCSIState *s, vscsi_req *req)
+{
+ uint8_t *cdb = req->iu.srp.cmd.cdb;
+ uint8_t resp_data[36];
+ int rc, len, alen;
+
+ /* We dont do EVPD. Also check that page_code is 0 */
+ if ((cdb[1] & 0x01) || (cdb[1] & 0x01) || cdb[2] != 0) {
+ /* Send INVALID FIELD IN CDB */
+ vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0);
+ vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
+ return;
+ }
+ alen = cdb[3];
+ alen = (alen << 8) | cdb[4];
+ len = MIN(alen, 36);
+
+ /* Fake up inquiry using PQ=3 */
+ memset(resp_data, 0, 36);
+ resp_data[0] = 0x7f; /* Not capable of supporting a device here */
+ resp_data[2] = 0x06; /* SPS-4 */
+ resp_data[3] = 0x02; /* Resp data format */
+ resp_data[4] = 36 - 5; /* Additional length */
+ resp_data[7] = 0x10; /* Sync transfers */
+ memcpy(&resp_data[16], "QEMU EMPTY ", 16);
+ memcpy(&resp_data[8], "QEMU ", 8);
+
+ req->writing = 0;
+ vscsi_preprocess_desc(req);
+ rc = vscsi_srp_transfer_data(s, req, 0, resp_data, len);
+ if (rc < 0) {
+ vscsi_makeup_sense(s, req, HARDWARE_ERROR, 0, 0);
+ vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
+ } else {
+ vscsi_send_rsp(s, req, 0, 36 - rc, 0);
+ }
+}
+
+static int vscsi_queue_cmd(VSCSIState *s, vscsi_req *req)
+{
+ union srp_iu *srp = &req->iu.srp;
+ SCSIDevice *sdev;
+ int n, id, lun;
+
+ vscsi_decode_id_lun(be64_to_cpu(srp->cmd.lun), &id, &lun);
+
+ /* Qemu vs. linux issue with LUNs to be sorted out ... */
+ sdev = (id < 8 && lun < 16) ? s->bus.devs[id] : NULL;
+ if (!sdev) {
+ dprintf("VSCSI: Command for id %d with no drive\n", id);
+ if (srp->cmd.cdb[0] == INQUIRY) {
+ vscsi_inquiry_no_target(s, req);
+ } else {
+ vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x24, 0x00);
+ vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
+ } return 1;
+ }
+
+ req->sdev = sdev;
+ req->lun = lun;
+ n = sdev->info->send_command(sdev, req->qtag, srp->cmd.cdb, lun);
+
+ dprintf("VSCSI: Queued command tag 0x%x CMD 0x%x ID %d LUN %d ret: %d\n",
+ req->qtag, srp->cmd.cdb[0], id, lun, n);
+
+ if (n) {
+ /* Transfer direction must be set before preprocessing the
+ * descriptors
+ */
+ req->writing = (n < 1);
+
+ /* Preprocess RDMA descriptors */
+ vscsi_preprocess_desc(req);
+ }
+
+ /* Get transfer direction and initiate transfer */
+ if (n > 0) {
+ req->data_len = n;
+ sdev->info->read_data(sdev, req->qtag);
+ } else if (n < 0) {
+ req->data_len = -n;
+ sdev->info->write_data(sdev, req->qtag);
+ }
+ /* Don't touch req here, it may have been recycled already */
+
+ return 0;
+}
+
+static int vscsi_process_tsk_mgmt(VSCSIState *s, vscsi_req *req)
+{
+ union viosrp_iu *iu = &req->iu;
+ int fn;
+
+ fprintf(stderr, "vscsi_process_tsk_mgmt %02x\n",
+ iu->srp.tsk_mgmt.tsk_mgmt_func);
+
+ switch (iu->srp.tsk_mgmt.tsk_mgmt_func) {
+#if 0 /* We really don't deal with these for now */
+ case SRP_TSK_ABORT_TASK:
+ fn = ABORT_TASK;
+ break;
+ case SRP_TSK_ABORT_TASK_SET:
+ fn = ABORT_TASK_SET;
+ break;
+ case SRP_TSK_CLEAR_TASK_SET:
+ fn = CLEAR_TASK_SET;
+ break;
+ case SRP_TSK_LUN_RESET:
+ fn = LOGICAL_UNIT_RESET;
+ break;
+ case SRP_TSK_CLEAR_ACA:
+ fn = CLEAR_ACA;
+ break;
+#endif
+ default:
+ fn = 0;
+ }
+ if (fn) {
+ /* XXX Send/Handle target task management */
+ ;
+ } else {
+ vscsi_makeup_sense(s, req, ILLEGAL_REQUEST, 0x20, 0);
+ vscsi_send_rsp(s, req, CHECK_CONDITION, 0, 0);
+ }
+ return !fn;
+}
+
+static int vscsi_handle_srp_req(VSCSIState *s, vscsi_req *req)
+{
+ union srp_iu *srp = &req->iu.srp;
+ int done = 1;
+ uint8_t opcode = srp->rsp.opcode;
+
+ switch (opcode) {
+ case SRP_LOGIN_REQ:
+ vscsi_process_login(s, req);
+ break;
+ case SRP_TSK_MGMT:
+ done = vscsi_process_tsk_mgmt(s, req);
+ break;
+ case SRP_CMD:
+ done = vscsi_queue_cmd(s, req);
+ break;
+ case SRP_LOGIN_RSP:
+ case SRP_I_LOGOUT:
+ case SRP_T_LOGOUT:
+ case SRP_RSP:
+ case SRP_CRED_REQ:
+ case SRP_CRED_RSP:
+ case SRP_AER_REQ:
+ case SRP_AER_RSP:
+ fprintf(stderr, "VSCSI: Unsupported opcode %02x\n", opcode);
+ break;
+ default:
+ fprintf(stderr, "VSCSI: Unknown type %02x\n", opcode);
+ }
+
+ return done;
+}
+
+static int vscsi_send_adapter_info(VSCSIState *s, vscsi_req *req)
+{
+ struct viosrp_adapter_info *sinfo;
+ struct mad_adapter_info_data info;
+ int rc;
+
+ sinfo = &req->iu.mad.adapter_info;
+
+#if 0 /* What for ? */
+ rc = spapr_tce_dma_read(&s->vdev, be64_to_cpu(sinfo->buffer),
+ &info, be16_to_cpu(sinfo->common.length));
+ if (rc) {
+ fprintf(stderr, "vscsi_send_adapter_info: DMA read failure !\n");
+ }
+#endif
+ memset(&info, 0, sizeof(info));
+ strcpy(info.srp_version, SRP_VERSION);
+ strncpy(info.partition_name, "qemu", sizeof("qemu"));
+ info.partition_number = cpu_to_be32(0);
+ info.mad_version = cpu_to_be32(1);
+ info.os_type = cpu_to_be32(2);
+ info.port_max_txu[0] = cpu_to_be32(VSCSI_MAX_SECTORS << 9);
+
+ rc = spapr_tce_dma_write(&s->vdev, be64_to_cpu(sinfo->buffer),
+ &info, be16_to_cpu(sinfo->common.length));
+ if (rc) {
+ fprintf(stderr, "vscsi_send_adapter_info: DMA write failure !\n");
+ }
+
+ sinfo->common.status = rc ? cpu_to_be32(1) : 0;
+
+ return vscsi_send_iu(s, req, sizeof(*sinfo), VIOSRP_MAD_FORMAT);
+}
+
+static int vscsi_handle_mad_req(VSCSIState *s, vscsi_req *req)
+{
+ union mad_iu *mad = &req->iu.mad;
+
+ switch (be32_to_cpu(mad->empty_iu.common.type)) {
+ case VIOSRP_EMPTY_IU_TYPE:
+ fprintf(stderr, "Unsupported EMPTY MAD IU\n");
+ break;
+ case VIOSRP_ERROR_LOG_TYPE:
+ fprintf(stderr, "Unsupported ERROR LOG MAD IU\n");
+ mad->error_log.common.status = cpu_to_be16(1);
+ vscsi_send_iu(s, req, sizeof(mad->error_log), VIOSRP_MAD_FORMAT);
+ break;
+ case VIOSRP_ADAPTER_INFO_TYPE:
+ vscsi_send_adapter_info(s, req);
+ break;
+ case VIOSRP_HOST_CONFIG_TYPE:
+ mad->host_config.common.status = cpu_to_be16(1);
+ vscsi_send_iu(s, req, sizeof(mad->host_config), VIOSRP_MAD_FORMAT);
+ break;
+ default:
+ fprintf(stderr, "VSCSI: Unknown MAD type %02x\n",
+ be32_to_cpu(mad->empty_iu.common.type));
+ }
+
+ return 1;
+}
+
+static void vscsi_got_payload(VSCSIState *s, vscsi_crq *crq)
+{
+ vscsi_req *req;
+ int done;
+
+ req = vscsi_get_req(s);
+ if (req == NULL) {
+ fprintf(stderr, "VSCSI: Failed to get a request !\n");
+ return;
+ }
+
+ /* We only support a limited number of descriptors, we know
+ * the ibmvscsi driver uses up to 10 max, so it should fit
+ * in our 256 bytes IUs. If not we'll have to increase the size
+ * of the structure.
+ */
+ if (crq->s.IU_length > sizeof(union viosrp_iu)) {
+ fprintf(stderr, "VSCSI: SRP IU too long (%d bytes) !\n",
+ crq->s.IU_length);
+ return;
+ }
+
+ /* XXX Handle failure differently ? */
+ if (spapr_tce_dma_read(&s->vdev, crq->s.IU_data_ptr, &req->iu,
+ crq->s.IU_length)) {
+ fprintf(stderr, "vscsi_got_payload: DMA read failure !\n");
+ qemu_free(req);
+ }
+ memcpy(&req->crq, crq, sizeof(vscsi_crq));
+
+ if (crq->s.format == VIOSRP_MAD_FORMAT) {
+ done = vscsi_handle_mad_req(s, req);
+ } else {
+ done = vscsi_handle_srp_req(s, req);
+ }
+
+ if (done) {
+ vscsi_put_req(s, req);
+ }
+}
+
+
+static int vscsi_do_crq(struct VIOsPAPRDevice *dev, uint8_t *crq_data)
+{
+ VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev);
+ vscsi_crq crq;
+
+ memcpy(crq.raw, crq_data, 16);
+ crq.s.timeout = be16_to_cpu(crq.s.timeout);
+ crq.s.IU_length = be16_to_cpu(crq.s.IU_length);
+ crq.s.IU_data_ptr = be64_to_cpu(crq.s.IU_data_ptr);
+
+ dprintf("VSCSI: do_crq %02x %02x ...\n", crq.raw[0], crq.raw[1]);
+
+ switch (crq.s.valid) {
+ case 0xc0: /* Init command/response */
+
+ /* Respond to initialization request */
+ if (crq.s.format == 0x01) {
+ memset(crq.raw, 0, 16);
+ crq.s.valid = 0xc0;
+ crq.s.format = 0x02;
+ spapr_vio_send_crq(dev, crq.raw);
+ }
+
+ /* Note that in hotplug cases, we might get a 0x02
+ * as a result of us emitting the init request
+ */
+
+ break;
+ case 0xff: /* Link event */
+
+ /* Not handled for now */
+
+ break;
+ case 0x80: /* Payloads */
+ switch (crq.s.format) {
+ case VIOSRP_SRP_FORMAT: /* AKA VSCSI request */
+ case VIOSRP_MAD_FORMAT: /* AKA VSCSI response */
+ vscsi_got_payload(s, &crq);
+ break;
+ case VIOSRP_OS400_FORMAT:
+ case VIOSRP_AIX_FORMAT:
+ case VIOSRP_LINUX_FORMAT:
+ case VIOSRP_INLINE_FORMAT:
+ fprintf(stderr, "vscsi_do_srq: Unsupported payload format %02x\n",
+ crq.s.format);
+ break;
+ default:
+ fprintf(stderr, "vscsi_do_srq: Unknown payload format %02x\n",
+ crq.s.format);
+ }
+ break;
+ default:
+ fprintf(stderr, "vscsi_do_crq: unknown CRQ %02x %02x ...\n",
+ crq.raw[0], crq.raw[1]);
+ };
+
+ return 0;
+}
+
+static int spapr_vscsi_init(VIOsPAPRDevice *dev)
+{
+ VSCSIState *s = DO_UPCAST(VSCSIState, vdev, dev);
+ int i;
+
+ dbg_vscsi_state = s;
+
+ /* Initialize qemu request tags */
+ memset(s->reqs, 0, sizeof(s->reqs));
+ for (i = 0; i < VSCSI_REQ_LIMIT; i++) {
+ s->reqs[i].qtag = i;
+ }
+
+ dev->crq.SendFunc = vscsi_do_crq;
+
+ scsi_bus_new(&s->bus, &dev->qdev, 1, VSCSI_REQ_LIMIT,
+ vscsi_command_complete);
+ if (!dev->qdev.hotplugged) {
+ scsi_bus_legacy_handle_cmdline(&s->bus);
+ }
+
+ return 0;
+}
+
+void spapr_vscsi_create(VIOsPAPRBus *bus, uint32_t reg,
+ qemu_irq qirq, uint32_t vio_irq_num)
+{
+ DeviceState *dev;
+ VIOsPAPRDevice *sdev;
+
+ dev = qdev_create(&bus->bus, "spapr-vscsi");
+ qdev_prop_set_uint32(dev, "reg", reg);
+
+ qdev_init_nofail(dev);
+
+ sdev = (VIOsPAPRDevice *)dev;
+ sdev->qirq = qirq;
+ sdev->vio_irq_num = vio_irq_num;
+}
+
+static int spapr_vscsi_devnode(VIOsPAPRDevice *dev, void *fdt, int node_off)
+{
+ int ret;
+
+ ret = fdt_setprop_cell(fdt, node_off, "#address-cells", 2);
+ if (ret < 0) {
+ return ret;
+ }
+
+ ret = fdt_setprop_cell(fdt, node_off, "#size-cells", 0);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return 0;
+}
+
+static VIOsPAPRDeviceInfo spapr_vscsi = {
+ .init = spapr_vscsi_init,
+ .devnode = spapr_vscsi_devnode,
+ .dt_name = "v-scsi",
+ .dt_type = "vscsi",
+ .dt_compatible = "IBM,v-scsi",
+ .signal_mask = 0x00000001,
+ .qdev.name = "spapr-vscsi",
+ .qdev.size = sizeof(VSCSIState),
+ .qdev.props = (Property[]) {
+ DEFINE_PROP_UINT32("reg", VIOsPAPRDevice, reg, 0x2000),
+ DEFINE_PROP_UINT32("dma-window", VIOsPAPRDevice,
+ rtce_window_size, 0x10000000),
+ DEFINE_PROP_END_OF_LIST(),
+ },
+};
+
+static void spapr_vscsi_register(void)
+{
+ spapr_vio_bus_register_withprop(&spapr_vscsi);
+}
+device_init(spapr_vscsi_register);
diff --git a/hw/srp.h b/hw/srp.h
new file mode 100644
index 0000000..afcd135
--- /dev/null
+++ b/hw/srp.h
@@ -0,0 +1,240 @@
+/*
+ * Copyright (c) 2005 Cisco Systems. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef SCSI_SRP_H
+#define SCSI_SRP_H
+
+/*
+ * Structures and constants for the SCSI RDMA Protocol (SRP) as
+ * defined by the INCITS T10 committee. This file was written using
+ * draft Revision 16a of the SRP standard.
+ */
+
+enum {
+
+ SRP_LOGIN_REQ = 0x00,
+ SRP_TSK_MGMT = 0x01,
+ SRP_CMD = 0x02,
+ SRP_I_LOGOUT = 0x03,
+ SRP_LOGIN_RSP = 0xc0,
+ SRP_RSP = 0xc1,
+ SRP_LOGIN_REJ = 0xc2,
+ SRP_T_LOGOUT = 0x80,
+ SRP_CRED_REQ = 0x81,
+ SRP_AER_REQ = 0x82,
+ SRP_CRED_RSP = 0x41,
+ SRP_AER_RSP = 0x42
+};
+
+enum {
+ SRP_BUF_FORMAT_DIRECT = 1 << 1,
+ SRP_BUF_FORMAT_INDIRECT = 1 << 2
+};
+
+enum {
+ SRP_NO_DATA_DESC = 0,
+ SRP_DATA_DESC_DIRECT = 1,
+ SRP_DATA_DESC_INDIRECT = 2
+};
+
+enum {
+ SRP_TSK_ABORT_TASK = 0x01,
+ SRP_TSK_ABORT_TASK_SET = 0x02,
+ SRP_TSK_CLEAR_TASK_SET = 0x04,
+ SRP_TSK_LUN_RESET = 0x08,
+ SRP_TSK_CLEAR_ACA = 0x40
+};
+
+enum srp_login_rej_reason {
+ SRP_LOGIN_REJ_UNABLE_ESTABLISH_CHANNEL = 0x00010000,
+ SRP_LOGIN_REJ_INSUFFICIENT_RESOURCES = 0x00010001,
+ SRP_LOGIN_REJ_REQ_IT_IU_LENGTH_TOO_LARGE = 0x00010002,
+ SRP_LOGIN_REJ_UNABLE_ASSOCIATE_CHANNEL = 0x00010003,
+ SRP_LOGIN_REJ_UNSUPPORTED_DESCRIPTOR_FMT = 0x00010004,
+ SRP_LOGIN_REJ_MULTI_CHANNEL_UNSUPPORTED = 0x00010005,
+ SRP_LOGIN_REJ_CHANNEL_LIMIT_REACHED = 0x00010006
+};
+
+enum {
+ SRP_REV10_IB_IO_CLASS = 0xff00,
+ SRP_REV16A_IB_IO_CLASS = 0x0100
+};
+
+struct srp_direct_buf {
+ uint64_t va;
+ uint32_t key;
+ uint32_t len;
+};
+
+/*
+ * We need the packed attribute because the SRP spec puts the list of
+ * descriptors at an offset of 20, which is not aligned to the size of
+ * struct srp_direct_buf. The whole structure must be packed to avoid
+ * having the 20-byte structure padded to 24 bytes on 64-bit architectures.
+ */
+struct srp_indirect_buf {
+ struct srp_direct_buf table_desc;
+ uint32_t len;
+ struct srp_direct_buf desc_list[0];
+} __attribute__((packed));
+
+enum {
+ SRP_MULTICHAN_SINGLE = 0,
+ SRP_MULTICHAN_MULTI = 1
+};
+
+struct srp_login_req {
+ uint8_t opcode;
+ uint8_t reserved1[7];
+ uint64_t tag;
+ uint32_t req_it_iu_len;
+ uint8_t reserved2[4];
+ uint16_t req_buf_fmt;
+ uint8_t req_flags;
+ uint8_t reserved3[5];
+ uint8_t initiator_port_id[16];
+ uint8_t target_port_id[16];
+};
+
+/*
+ * The SRP spec defines the size of the LOGIN_RSP structure to be 52
+ * bytes, so it needs to be packed to avoid having it padded to 56
+ * bytes on 64-bit architectures.
+ */
+struct srp_login_rsp {
+ uint8_t opcode;
+ uint8_t reserved1[3];
+ uint32_t req_lim_delta;
+ uint64_t tag;
+ uint32_t max_it_iu_len;
+ uint32_t max_ti_iu_len;
+ uint16_t buf_fmt;
+ uint8_t rsp_flags;
+ uint8_t reserved2[25];
+} __attribute__((packed));
+
+struct srp_login_rej {
+ uint8_t opcode;
+ uint8_t reserved1[3];
+ uint32_t reason;
+ uint64_t tag;
+ uint8_t reserved2[8];
+ uint16_t buf_fmt;
+ uint8_t reserved3[6];
+};
+
+struct srp_i_logout {
+ uint8_t opcode;
+ uint8_t reserved[7];
+ uint64_t tag;
+};
+
+struct srp_t_logout {
+ uint8_t opcode;
+ uint8_t sol_not;
+ uint8_t reserved[2];
+ uint32_t reason;
+ uint64_t tag;
+};
+
+/*
+ * We need the packed attribute because the SRP spec only aligns the
+ * 8-byte LUN field to 4 bytes.
+ */
+struct srp_tsk_mgmt {
+ uint8_t opcode;
+ uint8_t sol_not;
+ uint8_t reserved1[6];
+ uint64_t tag;
+ uint8_t reserved2[4];
+ uint64_t lun __attribute__((packed));
+ uint8_t reserved3[2];
+ uint8_t tsk_mgmt_func;
+ uint8_t reserved4;
+ uint64_t task_tag;
+ uint8_t reserved5[8];
+};
+
+/*
+ * We need the packed attribute because the SRP spec only aligns the
+ * 8-byte LUN field to 4 bytes.
+ */
+struct srp_cmd {
+ uint8_t opcode;
+ uint8_t sol_not;
+ uint8_t reserved1[3];
+ uint8_t buf_fmt;
+ uint8_t data_out_desc_cnt;
+ uint8_t data_in_desc_cnt;
+ uint64_t tag;
+ uint8_t reserved2[4];
+ uint64_t lun __attribute__((packed));
+ uint8_t reserved3;
+ uint8_t task_attr;
+ uint8_t reserved4;
+ uint8_t add_cdb_len;
+ uint8_t cdb[16];
+ uint8_t add_data[0];
+};
+
+enum {
+ SRP_RSP_FLAG_RSPVALID = 1 << 0,
+ SRP_RSP_FLAG_SNSVALID = 1 << 1,
+ SRP_RSP_FLAG_DOOVER = 1 << 2,
+ SRP_RSP_FLAG_DOUNDER = 1 << 3,
+ SRP_RSP_FLAG_DIOVER = 1 << 4,
+ SRP_RSP_FLAG_DIUNDER = 1 << 5
+};
+
+/*
+ * The SRP spec defines the size of the RSP structure to be 36 bytes,
+ * so it needs to be packed to avoid having it padded to 40 bytes on
+ * 64-bit architectures.
+ */
+struct srp_rsp {
+ uint8_t opcode;
+ uint8_t sol_not;
+ uint8_t reserved1[2];
+ uint32_t req_lim_delta;
+ uint64_t tag;
+ uint8_t reserved2[2];
+ uint8_t flags;
+ uint8_t status;
+ uint32_t data_out_res_cnt;
+ uint32_t data_in_res_cnt;
+ uint32_t sense_data_len;
+ uint32_t resp_data_len;
+ uint8_t data[0];
+} __attribute__((packed));
+
+#endif /* SCSI_SRP_H */
--
1.7.1
- [Qemu-devel] [PATCH 15/27] Virtual hash page table handling on pSeries machine, (continued)
- [Qemu-devel] [PATCH 15/27] Virtual hash page table handling on pSeries machine, David Gibson, 2011/03/23
- [Qemu-devel] [PATCH 14/27] Implement the bus structure for PAPR virtual IO, David Gibson, 2011/03/23
- [Qemu-devel] [PATCH 18/27] Implement the PAPR (pSeries) virtualized interrupt controller (xics), David Gibson, 2011/03/23
- [Qemu-devel] [PATCH 20/27] Add (virtual) interrupt to PAPR virtual tty device, David Gibson, 2011/03/23
- [Qemu-devel] [PATCH 16/27] Implement hcall based RTAS for pSeries machines, David Gibson, 2011/03/23
- [Qemu-devel] [PATCH 22/27] Implement sPAPR Virtual LAN (ibmveth), David Gibson, 2011/03/23
- [Qemu-devel] [PATCH 23/27] Implement PAPR CRQ hypercalls, David Gibson, 2011/03/23
- [Qemu-devel] [PATCH 21/27] Implement TCE translation for sPAPR VIO, David Gibson, 2011/03/23
- [Qemu-devel] [PATCH 26/27] Implement PAPR VPA functions for pSeries shared processor partitions, David Gibson, 2011/03/23
- [Qemu-devel] [PATCH 25/27] Add a PAPR TCE-bypass mechanism for the pSeries machine, David Gibson, 2011/03/23
- [Qemu-devel] [PATCH 24/27] Implement PAPR virtual SCSI interface (ibmvscsi),
David Gibson <=
- Message not available
- [Qemu-devel] Re: [0/27] Implement emulation of pSeries logical partitions (v4), Alexander Graf, 2011/03/23
- [Qemu-devel] Re: [0/27] Implement emulation of pSeries logical partitions (v4), Alexander Graf, 2011/03/23