Commit d3cf81f9 authored by Sagi Grimberg's avatar Sagi Grimberg Committed by Doug Ledford

IB/iser,isert: Create and use new shared header

The iser RDMA_CM negotiation protocol is shared by
the initiator and the target, so have a shared header
for the defines and structure. Move relevant items from
the initiator and target headers.
Signed-off-by: default avatarSagi Grimberg <sagig@mellanox.com>
Signed-off-by: default avatarJenny Derzhavetz <jennyf@mellanox.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 1caa70d8
......@@ -48,6 +48,7 @@
#include <scsi/scsi_transport_iscsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/iser.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
......@@ -153,40 +154,8 @@
#define ISER_SIGNAL_CMD_COUNT 32
#define ISER_VER 0x10
#define ISER_WSV 0x08
#define ISER_RSV 0x04
/**
* struct iser_hdr - iSER header
*
* @flags: flags support (zbva, remote_inv)
* @rsvd: reserved
* @write_stag: write rkey
* @write_va: write virtual address
* @reaf_stag: read rkey
* @read_va: read virtual address
*/
struct iser_hdr {
u8 flags;
u8 rsvd[3];
__be32 write_stag;
__be64 write_va;
__be32 read_stag;
__be64 read_va;
} __attribute__((packed));
#define ISER_ZBVA_NOT_SUPPORTED 0x80
#define ISER_SEND_W_INV_NOT_SUPPORTED 0x40
struct iser_cm_hdr {
u8 flags;
u8 rsvd[3];
} __packed;
/* Constant PDU lengths calculations */
#define ISER_HEADERS_LEN (sizeof(struct iser_hdr) + sizeof(struct iscsi_hdr))
#define ISER_HEADERS_LEN (sizeof(struct iser_ctrl) + sizeof(struct iscsi_hdr))
#define ISER_RECV_DATA_SEG_LEN 128
#define ISER_RX_PAYLOAD_SIZE (ISER_HEADERS_LEN + ISER_RECV_DATA_SEG_LEN)
......@@ -283,7 +252,7 @@ enum iser_desc_type {
* @sig_attrs: Signature attributes
*/
struct iser_tx_desc {
struct iser_hdr iser_header;
struct iser_ctrl iser_header;
struct iscsi_hdr iscsi_header;
enum iser_desc_type type;
u64 dma_addr;
......@@ -316,7 +285,7 @@ struct iser_tx_desc {
* @pad: for sense data TODO: Modify to maximum sense length supported
*/
struct iser_rx_desc {
struct iser_hdr iser_header;
struct iser_ctrl iser_header;
struct iscsi_hdr iscsi_header;
char data[ISER_RECV_DATA_SEG_LEN];
u64 dma_addr;
......
......@@ -51,7 +51,7 @@ static int iser_prepare_read_cmd(struct iscsi_task *task)
struct iscsi_iser_task *iser_task = task->dd_data;
struct iser_mem_reg *mem_reg;
int err;
struct iser_hdr *hdr = &iser_task->desc.iser_header;
struct iser_ctrl *hdr = &iser_task->desc.iser_header;
struct iser_data_buf *buf_in = &iser_task->data[ISER_DIR_IN];
err = iser_dma_map_task_data(iser_task,
......@@ -104,7 +104,7 @@ iser_prepare_write_cmd(struct iscsi_task *task,
struct iscsi_iser_task *iser_task = task->dd_data;
struct iser_mem_reg *mem_reg;
int err;
struct iser_hdr *hdr = &iser_task->desc.iser_header;
struct iser_ctrl *hdr = &iser_task->desc.iser_header;
struct iser_data_buf *buf_out = &iser_task->data[ISER_DIR_OUT];
struct ib_sge *tx_dsg = &iser_task->desc.tx_sg[1];
......@@ -167,7 +167,7 @@ static void iser_create_send_desc(struct iser_conn *iser_conn,
ib_dma_sync_single_for_cpu(device->ib_device,
tx_desc->dma_addr, ISER_HEADERS_LEN, DMA_TO_DEVICE);
memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr));
memset(&tx_desc->iser_header, 0, sizeof(struct iser_ctrl));
tx_desc->iser_header.flags = ISER_VER;
tx_desc->num_sge = 1;
}
......@@ -574,7 +574,7 @@ void iser_login_rsp(struct ib_cq *cq, struct ib_wc *wc)
desc->rsp_dma, ISER_RX_LOGIN_SIZE,
DMA_FROM_DEVICE);
hdr = desc->rsp + sizeof(struct iser_hdr);
hdr = desc->rsp + sizeof(struct iser_ctrl);
data = desc->rsp + ISER_HEADERS_LEN;
length = wc->byte_len - ISER_HEADERS_LEN;
......
......@@ -812,10 +812,9 @@ static void iser_route_handler(struct rdma_cm_id *cma_id)
conn_param.rnr_retry_count = 6;
memset(&req_hdr, 0, sizeof(req_hdr));
req_hdr.flags = (ISER_ZBVA_NOT_SUPPORTED |
ISER_SEND_W_INV_NOT_SUPPORTED);
conn_param.private_data = (void *)&req_hdr;
conn_param.private_data_len = sizeof(struct iser_cm_hdr);
req_hdr.flags = (ISER_ZBVA_NOT_SUP | ISER_SEND_W_INV_NOT_SUP);
conn_param.private_data = (void *)&req_hdr;
conn_param.private_data_len = sizeof(struct iser_cm_hdr);
ret = rdma_connect(cma_id, &conn_param);
if (ret) {
......
......@@ -1028,8 +1028,8 @@ isert_create_send_desc(struct isert_conn *isert_conn,
ib_dma_sync_single_for_cpu(ib_dev, tx_desc->dma_addr,
ISER_HEADERS_LEN, DMA_TO_DEVICE);
memset(&tx_desc->iser_header, 0, sizeof(struct iser_hdr));
tx_desc->iser_header.flags = ISER_VER;
memset(&tx_desc->iser_header, 0, sizeof(struct iser_ctrl));
tx_desc->iser_header.flags = ISCSI_CTRL;
tx_desc->num_sge = 1;
tx_desc->isert_cmd = isert_cmd;
......@@ -1521,21 +1521,21 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
static void
isert_rx_do_work(struct iser_rx_desc *rx_desc, struct isert_conn *isert_conn)
{
struct iser_hdr *iser_hdr = &rx_desc->iser_header;
struct iser_ctrl *iser_ctrl = &rx_desc->iser_header;
uint64_t read_va = 0, write_va = 0;
uint32_t read_stag = 0, write_stag = 0;
switch (iser_hdr->flags & 0xF0) {
switch (iser_ctrl->flags & 0xF0) {
case ISCSI_CTRL:
if (iser_hdr->flags & ISER_RSV) {
read_stag = be32_to_cpu(iser_hdr->read_stag);
read_va = be64_to_cpu(iser_hdr->read_va);
if (iser_ctrl->flags & ISER_RSV) {
read_stag = be32_to_cpu(iser_ctrl->read_stag);
read_va = be64_to_cpu(iser_ctrl->read_va);
isert_dbg("ISER_RSV: read_stag: 0x%x read_va: 0x%llx\n",
read_stag, (unsigned long long)read_va);
}
if (iser_hdr->flags & ISER_WSV) {
write_stag = be32_to_cpu(iser_hdr->write_stag);
write_va = be64_to_cpu(iser_hdr->write_va);
if (iser_ctrl->flags & ISER_WSV) {
write_stag = be32_to_cpu(iser_ctrl->write_stag);
write_va = be64_to_cpu(iser_ctrl->write_va);
isert_dbg("ISER_WSV: write_stag: 0x%x write_va: 0x%llx\n",
write_stag, (unsigned long long)write_va);
}
......@@ -1546,7 +1546,7 @@ isert_rx_do_work(struct iser_rx_desc *rx_desc, struct isert_conn *isert_conn)
isert_err("iSER Hello message\n");
break;
default:
isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_hdr->flags);
isert_warn("Unknown iSER hdr flags: 0x%02x\n", iser_ctrl->flags);
break;
}
......
......@@ -3,6 +3,8 @@
#include <linux/in6.h>
#include <rdma/ib_verbs.h>
#include <rdma/rdma_cm.h>
#include <scsi/iser.h>
#define DRV_NAME "isert"
#define PFX DRV_NAME ": "
......@@ -56,7 +58,7 @@ enum iser_conn_state {
};
struct iser_rx_desc {
struct iser_hdr iser_header;
struct iser_ctrl iser_header;
struct iscsi_hdr iscsi_header;
char data[ISER_RECV_DATA_SEG_LEN];
u64 dma_addr;
......@@ -65,7 +67,7 @@ struct iser_rx_desc {
} __packed;
struct iser_tx_desc {
struct iser_hdr iser_header;
struct iser_ctrl iser_header;
struct iscsi_hdr iscsi_header;
enum isert_desc_type type;
u64 dma_addr;
......
/* From iscsi_iser.h */
struct iser_hdr {
u8 flags;
u8 rsvd[3];
__be32 write_stag; /* write rkey */
__be64 write_va;
__be32 read_stag; /* read rkey */
__be64 read_va;
} __packed;
/*Constant PDU lengths calculations */
#define ISER_HEADERS_LEN (sizeof(struct iser_hdr) + sizeof(struct iscsi_hdr))
/* Constant PDU lengths calculations */
#define ISER_HEADERS_LEN (sizeof(struct iser_ctrl) + sizeof(struct iscsi_hdr))
#define ISER_RECV_DATA_SEG_LEN 8192
#define ISER_RX_PAYLOAD_SIZE (ISER_HEADERS_LEN + ISER_RECV_DATA_SEG_LEN)
......@@ -38,10 +29,3 @@ struct iser_hdr {
#define ISER_RX_PAD_SIZE (ISER_RECV_DATA_SEG_LEN + 4096 - \
(ISER_RX_PAYLOAD_SIZE + sizeof(u64) + sizeof(struct ib_sge)))
#define ISER_VER 0x10
#define ISER_WSV 0x08
#define ISER_RSV 0x04
#define ISCSI_CTRL 0x10
#define ISER_HELLO 0x20
#define ISER_HELLORPLY 0x30
/*
* Copyright (c) 2015 Mellanox Technologies. 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 ISCSI_ISER_H
#define ISCSI_ISER_H
#define ISER_ZBVA_NOT_SUP 0x80
#define ISER_SEND_W_INV_NOT_SUP 0x40
#define ISERT_ZBVA_NOT_USED 0x80
#define ISERT_SEND_W_INV_NOT_USED 0x40
#define ISCSI_CTRL 0x10
#define ISER_HELLO 0x20
#define ISER_HELLORPLY 0x30
#define ISER_VER 0x10
#define ISER_WSV 0x08
#define ISER_RSV 0x04
/**
* struct iser_cm_hdr - iSER CM header (from iSER Annex A12)
*
* @flags: flags support (zbva, send_w_inv)
* @rsvd: reserved
*/
struct iser_cm_hdr {
u8 flags;
u8 rsvd[3];
} __packed;
/**
* struct iser_ctrl - iSER header of iSCSI control PDU
*
* @flags: opcode and read/write valid bits
* @rsvd: reserved
* @write_stag: write rkey
* @write_va: write virtual address
* @reaf_stag: read rkey
* @read_va: read virtual address
*/
struct iser_ctrl {
u8 flags;
u8 rsvd[3];
__be32 write_stag;
__be64 write_va;
__be32 read_stag;
__be64 read_va;
} __packed;
#endif /* ISCSI_ISER_H */
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