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linux_dsm_epyc7002/drivers/infiniband/hw/cxgb3/iwch_qp.c
Bart Van Assche d34ac5cd3a RDMA, core and ULPs: Declare ib_post_send() and ib_post_recv() arguments const 
Since neither ib_post_send() nor ib_post_recv() modify the data structure
their second argument points at, declare that argument const. This change
makes it necessary to declare the 'bad_wr' argument const too and also to
modify all ULPs that call ib_post_send(), ib_post_recv() or
ib_post_srq_recv(). This patch does not change any functionality but makes
it possible for the compiler to verify whether the
ib_post_(send|recv|srq_recv) really do not modify the posted work request.

To make this possible, only one cast had to be introduce that casts away
constness, namely in rpcrdma_post_recvs(). The only way I can think of to
avoid that cast is to introduce an additional loop in that function or to
change the data type of bad_wr from struct ib_recv_wr ** into int
(an index that refers to an element in the work request list). However,
both approaches would require even more extensive changes than this
patch.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-07-30 20:09:34 -06:00

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/*
* Copyright (c) 2006 Chelsio, Inc. 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.
*/
#include <linux/sched.h>
#include <linux/gfp.h>
#include "iwch_provider.h"
#include "iwch.h"
#include "iwch_cm.h"
#include "cxio_hal.h"
#include "cxio_resource.h"
#define NO_SUPPORT -1
static int build_rdma_send(union t3_wr *wqe, const struct ib_send_wr *wr,
u8 *flit_cnt)
{
int i;
u32 plen;
switch (wr->opcode) {
case IB_WR_SEND:
if (wr->send_flags & IB_SEND_SOLICITED)
wqe->send.rdmaop = T3_SEND_WITH_SE;
else
wqe->send.rdmaop = T3_SEND;
wqe->send.rem_stag = 0;
break;
case IB_WR_SEND_WITH_INV:
if (wr->send_flags & IB_SEND_SOLICITED)
wqe->send.rdmaop = T3_SEND_WITH_SE_INV;
else
wqe->send.rdmaop = T3_SEND_WITH_INV;
wqe->send.rem_stag = cpu_to_be32(wr->ex.invalidate_rkey);
break;
default:
return -EINVAL;
}
if (wr->num_sge > T3_MAX_SGE)
return -EINVAL;
wqe->send.reserved[0] = 0;
wqe->send.reserved[1] = 0;
wqe->send.reserved[2] = 0;
plen = 0;
for (i = 0; i < wr->num_sge; i++) {
if ((plen + wr->sg_list[i].length) < plen)
return -EMSGSIZE;
plen += wr->sg_list[i].length;
wqe->send.sgl[i].stag = cpu_to_be32(wr->sg_list[i].lkey);
wqe->send.sgl[i].len = cpu_to_be32(wr->sg_list[i].length);
wqe->send.sgl[i].to = cpu_to_be64(wr->sg_list[i].addr);
}
wqe->send.num_sgle = cpu_to_be32(wr->num_sge);
*flit_cnt = 4 + ((wr->num_sge) << 1);
wqe->send.plen = cpu_to_be32(plen);
return 0;
}
static int build_rdma_write(union t3_wr *wqe, const struct ib_send_wr *wr,
u8 *flit_cnt)
{
int i;
u32 plen;
if (wr->num_sge > T3_MAX_SGE)
return -EINVAL;
wqe->write.rdmaop = T3_RDMA_WRITE;
wqe->write.reserved[0] = 0;
wqe->write.reserved[1] = 0;
wqe->write.reserved[2] = 0;
wqe->write.stag_sink = cpu_to_be32(rdma_wr(wr)->rkey);
wqe->write.to_sink = cpu_to_be64(rdma_wr(wr)->remote_addr);
if (wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) {
plen = 4;
wqe->write.sgl[0].stag = wr->ex.imm_data;
wqe->write.sgl[0].len = cpu_to_be32(0);
wqe->write.num_sgle = cpu_to_be32(0);
*flit_cnt = 6;
} else {
plen = 0;
for (i = 0; i < wr->num_sge; i++) {
if ((plen + wr->sg_list[i].length) < plen) {
return -EMSGSIZE;
}
plen += wr->sg_list[i].length;
wqe->write.sgl[i].stag =
cpu_to_be32(wr->sg_list[i].lkey);
wqe->write.sgl[i].len =
cpu_to_be32(wr->sg_list[i].length);
wqe->write.sgl[i].to =
cpu_to_be64(wr->sg_list[i].addr);
}
wqe->write.num_sgle = cpu_to_be32(wr->num_sge);
*flit_cnt = 5 + ((wr->num_sge) << 1);
}
wqe->write.plen = cpu_to_be32(plen);
return 0;
}
static int build_rdma_read(union t3_wr *wqe, const struct ib_send_wr *wr,
u8 *flit_cnt)
{
if (wr->num_sge > 1)
return -EINVAL;
wqe->read.rdmaop = T3_READ_REQ;
if (wr->opcode == IB_WR_RDMA_READ_WITH_INV)
wqe->read.local_inv = 1;
else
wqe->read.local_inv = 0;
wqe->read.reserved[0] = 0;
wqe->read.reserved[1] = 0;
wqe->read.rem_stag = cpu_to_be32(rdma_wr(wr)->rkey);
wqe->read.rem_to = cpu_to_be64(rdma_wr(wr)->remote_addr);
wqe->read.local_stag = cpu_to_be32(wr->sg_list[0].lkey);
wqe->read.local_len = cpu_to_be32(wr->sg_list[0].length);
wqe->read.local_to = cpu_to_be64(wr->sg_list[0].addr);
*flit_cnt = sizeof(struct t3_rdma_read_wr) >> 3;
return 0;
}
static int build_memreg(union t3_wr *wqe, const struct ib_reg_wr *wr,
u8 *flit_cnt, int *wr_cnt, struct t3_wq *wq)
{
struct iwch_mr *mhp = to_iwch_mr(wr->mr);
int i;
__be64 *p;
if (mhp->npages > T3_MAX_FASTREG_DEPTH)
return -EINVAL;
*wr_cnt = 1;
wqe->fastreg.stag = cpu_to_be32(wr->key);
wqe->fastreg.len = cpu_to_be32(mhp->ibmr.length);
wqe->fastreg.va_base_hi = cpu_to_be32(mhp->ibmr.iova >> 32);
wqe->fastreg.va_base_lo_fbo =
cpu_to_be32(mhp->ibmr.iova & 0xffffffff);
wqe->fastreg.page_type_perms = cpu_to_be32(
V_FR_PAGE_COUNT(mhp->npages) |
V_FR_PAGE_SIZE(ilog2(wr->mr->page_size) - 12) |
V_FR_TYPE(TPT_VATO) |
V_FR_PERMS(iwch_ib_to_tpt_access(wr->access)));
p = &wqe->fastreg.pbl_addrs[0];
for (i = 0; i < mhp->npages; i++, p++) {
/* If we need a 2nd WR, then set it up */
if (i == T3_MAX_FASTREG_FRAG) {
*wr_cnt = 2;
wqe = (union t3_wr *)(wq->queue +
Q_PTR2IDX((wq->wptr+1), wq->size_log2));
build_fw_riwrh((void *)wqe, T3_WR_FASTREG, 0,
Q_GENBIT(wq->wptr + 1, wq->size_log2),
0, 1 + mhp->npages - T3_MAX_FASTREG_FRAG,
T3_EOP);
p = &wqe->pbl_frag.pbl_addrs[0];
}
*p = cpu_to_be64((u64)mhp->pages[i]);
}
*flit_cnt = 5 + mhp->npages;
if (*flit_cnt > 15)
*flit_cnt = 15;
return 0;
}
static int build_inv_stag(union t3_wr *wqe, const struct ib_send_wr *wr,
u8 *flit_cnt)
{
wqe->local_inv.stag = cpu_to_be32(wr->ex.invalidate_rkey);
wqe->local_inv.reserved = 0;
*flit_cnt = sizeof(struct t3_local_inv_wr) >> 3;
return 0;
}
static int iwch_sgl2pbl_map(struct iwch_dev *rhp, struct ib_sge *sg_list,
u32 num_sgle, u32 * pbl_addr, u8 * page_size)
{
int i;
struct iwch_mr *mhp;
u64 offset;
for (i = 0; i < num_sgle; i++) {
mhp = get_mhp(rhp, (sg_list[i].lkey) >> 8);
if (!mhp) {
pr_debug("%s %d\n", __func__, __LINE__);
return -EIO;
}
if (!mhp->attr.state) {
pr_debug("%s %d\n", __func__, __LINE__);
return -EIO;
}
if (mhp->attr.zbva) {
pr_debug("%s %d\n", __func__, __LINE__);
return -EIO;
}
if (sg_list[i].addr < mhp->attr.va_fbo) {
pr_debug("%s %d\n", __func__, __LINE__);
return -EINVAL;
}
if (sg_list[i].addr + ((u64) sg_list[i].length) <
sg_list[i].addr) {
pr_debug("%s %d\n", __func__, __LINE__);
return -EINVAL;
}
if (sg_list[i].addr + ((u64) sg_list[i].length) >
mhp->attr.va_fbo + ((u64) mhp->attr.len)) {
pr_debug("%s %d\n", __func__, __LINE__);
return -EINVAL;
}
offset = sg_list[i].addr - mhp->attr.va_fbo;
offset += mhp->attr.va_fbo &
((1UL << (12 + mhp->attr.page_size)) - 1);
pbl_addr[i] = ((mhp->attr.pbl_addr -
rhp->rdev.rnic_info.pbl_base) >> 3) +
(offset >> (12 + mhp->attr.page_size));
page_size[i] = mhp->attr.page_size;
}
return 0;
}
static int build_rdma_recv(struct iwch_qp *qhp, union t3_wr *wqe,
const struct ib_recv_wr *wr)
{
int i, err = 0;
u32 pbl_addr[T3_MAX_SGE];
u8 page_size[T3_MAX_SGE];
err = iwch_sgl2pbl_map(qhp->rhp, wr->sg_list, wr->num_sge, pbl_addr,
page_size);
if (err)
return err;
wqe->recv.pagesz[0] = page_size[0];
wqe->recv.pagesz[1] = page_size[1];
wqe->recv.pagesz[2] = page_size[2];
wqe->recv.pagesz[3] = page_size[3];
wqe->recv.num_sgle = cpu_to_be32(wr->num_sge);
for (i = 0; i < wr->num_sge; i++) {
wqe->recv.sgl[i].stag = cpu_to_be32(wr->sg_list[i].lkey);
wqe->recv.sgl[i].len = cpu_to_be32(wr->sg_list[i].length);
/* to in the WQE == the offset into the page */
wqe->recv.sgl[i].to = cpu_to_be64(((u32)wr->sg_list[i].addr) &
((1UL << (12 + page_size[i])) - 1));
/* pbl_addr is the adapters address in the PBL */
wqe->recv.pbl_addr[i] = cpu_to_be32(pbl_addr[i]);
}
for (; i < T3_MAX_SGE; i++) {
wqe->recv.sgl[i].stag = 0;
wqe->recv.sgl[i].len = 0;
wqe->recv.sgl[i].to = 0;
wqe->recv.pbl_addr[i] = 0;
}
qhp->wq.rq[Q_PTR2IDX(qhp->wq.rq_wptr,
qhp->wq.rq_size_log2)].wr_id = wr->wr_id;
qhp->wq.rq[Q_PTR2IDX(qhp->wq.rq_wptr,
qhp->wq.rq_size_log2)].pbl_addr = 0;
return 0;
}
static int build_zero_stag_recv(struct iwch_qp *qhp, union t3_wr *wqe,
const struct ib_recv_wr *wr)
{
int i;
u32 pbl_addr;
u32 pbl_offset;
/*
* The T3 HW requires the PBL in the HW recv descriptor to reference
* a PBL entry. So we allocate the max needed PBL memory here and pass
* it to the uP in the recv WR. The uP will build the PBL and setup
* the HW recv descriptor.
*/
pbl_addr = cxio_hal_pblpool_alloc(&qhp->rhp->rdev, T3_STAG0_PBL_SIZE);
if (!pbl_addr)
return -ENOMEM;
/*
* Compute the 8B aligned offset.
*/
pbl_offset = (pbl_addr - qhp->rhp->rdev.rnic_info.pbl_base) >> 3;
wqe->recv.num_sgle = cpu_to_be32(wr->num_sge);
for (i = 0; i < wr->num_sge; i++) {
/*
* Use a 128MB page size. This and an imposed 128MB
* sge length limit allows us to require only a 2-entry HW
* PBL for each SGE. This restriction is acceptable since
* since it is not possible to allocate 128MB of contiguous
* DMA coherent memory!
*/
if (wr->sg_list[i].length > T3_STAG0_MAX_PBE_LEN)
return -EINVAL;
wqe->recv.pagesz[i] = T3_STAG0_PAGE_SHIFT;
/*
* T3 restricts a recv to all zero-stag or all non-zero-stag.
*/
if (wr->sg_list[i].lkey != 0)
return -EINVAL;
wqe->recv.sgl[i].stag = 0;
wqe->recv.sgl[i].len = cpu_to_be32(wr->sg_list[i].length);
wqe->recv.sgl[i].to = cpu_to_be64(wr->sg_list[i].addr);
wqe->recv.pbl_addr[i] = cpu_to_be32(pbl_offset);
pbl_offset += 2;
}
for (; i < T3_MAX_SGE; i++) {
wqe->recv.pagesz[i] = 0;
wqe->recv.sgl[i].stag = 0;
wqe->recv.sgl[i].len = 0;
wqe->recv.sgl[i].to = 0;
wqe->recv.pbl_addr[i] = 0;
}
qhp->wq.rq[Q_PTR2IDX(qhp->wq.rq_wptr,
qhp->wq.rq_size_log2)].wr_id = wr->wr_id;
qhp->wq.rq[Q_PTR2IDX(qhp->wq.rq_wptr,
qhp->wq.rq_size_log2)].pbl_addr = pbl_addr;
return 0;
}
int iwch_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
const struct ib_send_wr **bad_wr)
{
int err = 0;
u8 uninitialized_var(t3_wr_flit_cnt);
enum t3_wr_opcode t3_wr_opcode = 0;
enum t3_wr_flags t3_wr_flags;
struct iwch_qp *qhp;
u32 idx;
union t3_wr *wqe;
u32 num_wrs;
unsigned long flag;
struct t3_swsq *sqp;
int wr_cnt = 1;
qhp = to_iwch_qp(ibqp);
spin_lock_irqsave(&qhp->lock, flag);
if (qhp->attr.state > IWCH_QP_STATE_RTS) {
spin_unlock_irqrestore(&qhp->lock, flag);
err = -EINVAL;
goto out;
}
num_wrs = Q_FREECNT(qhp->wq.sq_rptr, qhp->wq.sq_wptr,
qhp->wq.sq_size_log2);
if (num_wrs == 0) {
spin_unlock_irqrestore(&qhp->lock, flag);
err = -ENOMEM;
goto out;
}
while (wr) {
if (num_wrs == 0) {
err = -ENOMEM;
break;
}
idx = Q_PTR2IDX(qhp->wq.wptr, qhp->wq.size_log2);
wqe = (union t3_wr *) (qhp->wq.queue + idx);
t3_wr_flags = 0;
if (wr->send_flags & IB_SEND_SOLICITED)
t3_wr_flags |= T3_SOLICITED_EVENT_FLAG;
if (wr->send_flags & IB_SEND_SIGNALED)
t3_wr_flags |= T3_COMPLETION_FLAG;
sqp = qhp->wq.sq +
Q_PTR2IDX(qhp->wq.sq_wptr, qhp->wq.sq_size_log2);
switch (wr->opcode) {
case IB_WR_SEND:
case IB_WR_SEND_WITH_INV:
if (wr->send_flags & IB_SEND_FENCE)
t3_wr_flags |= T3_READ_FENCE_FLAG;
t3_wr_opcode = T3_WR_SEND;
err = build_rdma_send(wqe, wr, &t3_wr_flit_cnt);
break;
case IB_WR_RDMA_WRITE:
case IB_WR_RDMA_WRITE_WITH_IMM:
t3_wr_opcode = T3_WR_WRITE;
err = build_rdma_write(wqe, wr, &t3_wr_flit_cnt);
break;
case IB_WR_RDMA_READ:
case IB_WR_RDMA_READ_WITH_INV:
t3_wr_opcode = T3_WR_READ;
t3_wr_flags = 0; /* T3 reads are always signaled */
err = build_rdma_read(wqe, wr, &t3_wr_flit_cnt);
if (err)
break;
sqp->read_len = wqe->read.local_len;
if (!qhp->wq.oldest_read)
qhp->wq.oldest_read = sqp;
break;
case IB_WR_REG_MR:
t3_wr_opcode = T3_WR_FASTREG;
err = build_memreg(wqe, reg_wr(wr), &t3_wr_flit_cnt,
&wr_cnt, &qhp->wq);
break;
case IB_WR_LOCAL_INV:
if (wr->send_flags & IB_SEND_FENCE)
t3_wr_flags |= T3_LOCAL_FENCE_FLAG;
t3_wr_opcode = T3_WR_INV_STAG;
err = build_inv_stag(wqe, wr, &t3_wr_flit_cnt);
break;
default:
pr_debug("%s post of type=%d TBD!\n", __func__,
wr->opcode);
err = -EINVAL;
}
if (err)
break;
wqe->send.wrid.id0.hi = qhp->wq.sq_wptr;
sqp->wr_id = wr->wr_id;
sqp->opcode = wr2opcode(t3_wr_opcode);
sqp->sq_wptr = qhp->wq.sq_wptr;
sqp->complete = 0;
sqp->signaled = (wr->send_flags & IB_SEND_SIGNALED);
build_fw_riwrh((void *) wqe, t3_wr_opcode, t3_wr_flags,
Q_GENBIT(qhp->wq.wptr, qhp->wq.size_log2),
0, t3_wr_flit_cnt,
(wr_cnt == 1) ? T3_SOPEOP : T3_SOP);
pr_debug("%s cookie 0x%llx wq idx 0x%x swsq idx %ld opcode %d\n",
__func__, (unsigned long long)wr->wr_id, idx,
Q_PTR2IDX(qhp->wq.sq_wptr, qhp->wq.sq_size_log2),
sqp->opcode);
wr = wr->next;
num_wrs--;
qhp->wq.wptr += wr_cnt;
++(qhp->wq.sq_wptr);
}
spin_unlock_irqrestore(&qhp->lock, flag);
if (cxio_wq_db_enabled(&qhp->wq))
ring_doorbell(qhp->wq.doorbell, qhp->wq.qpid);
out:
if (err)
*bad_wr = wr;
return err;
}
int iwch_post_receive(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
const struct ib_recv_wr **bad_wr)
{
int err = 0;
struct iwch_qp *qhp;
u32 idx;
union t3_wr *wqe;
u32 num_wrs;
unsigned long flag;
qhp = to_iwch_qp(ibqp);
spin_lock_irqsave(&qhp->lock, flag);
if (qhp->attr.state > IWCH_QP_STATE_RTS) {
spin_unlock_irqrestore(&qhp->lock, flag);
err = -EINVAL;
goto out;
}
num_wrs = Q_FREECNT(qhp->wq.rq_rptr, qhp->wq.rq_wptr,
qhp->wq.rq_size_log2) - 1;
if (!wr) {
spin_unlock_irqrestore(&qhp->lock, flag);
err = -ENOMEM;
goto out;
}
while (wr) {
if (wr->num_sge > T3_MAX_SGE) {
err = -EINVAL;
break;
}
idx = Q_PTR2IDX(qhp->wq.wptr, qhp->wq.size_log2);
wqe = (union t3_wr *) (qhp->wq.queue + idx);
if (num_wrs)
if (wr->sg_list[0].lkey)
err = build_rdma_recv(qhp, wqe, wr);
else
err = build_zero_stag_recv(qhp, wqe, wr);
else
err = -ENOMEM;
if (err)
break;
build_fw_riwrh((void *) wqe, T3_WR_RCV, T3_COMPLETION_FLAG,
Q_GENBIT(qhp->wq.wptr, qhp->wq.size_log2),
0, sizeof(struct t3_receive_wr) >> 3, T3_SOPEOP);
pr_debug("%s cookie 0x%llx idx 0x%x rq_wptr 0x%x rw_rptr 0x%x wqe %p\n",
__func__, (unsigned long long)wr->wr_id,
idx, qhp->wq.rq_wptr, qhp->wq.rq_rptr, wqe);
++(qhp->wq.rq_wptr);
++(qhp->wq.wptr);
wr = wr->next;
num_wrs--;
}
spin_unlock_irqrestore(&qhp->lock, flag);
if (cxio_wq_db_enabled(&qhp->wq))
ring_doorbell(qhp->wq.doorbell, qhp->wq.qpid);
out:
if (err)
*bad_wr = wr;
return err;
}
static inline void build_term_codes(struct respQ_msg_t *rsp_msg,
u8 *layer_type, u8 *ecode)
{
int status = TPT_ERR_INTERNAL_ERR;
int tagged = 0;
int opcode = -1;
int rqtype = 0;
int send_inv = 0;
if (rsp_msg) {
status = CQE_STATUS(rsp_msg->cqe);
opcode = CQE_OPCODE(rsp_msg->cqe);
rqtype = RQ_TYPE(rsp_msg->cqe);
send_inv = (opcode == T3_SEND_WITH_INV) ||
(opcode == T3_SEND_WITH_SE_INV);
tagged = (opcode == T3_RDMA_WRITE) ||
(rqtype && (opcode == T3_READ_RESP));
}
switch (status) {
case TPT_ERR_STAG:
if (send_inv) {
*layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
*ecode = RDMAP_CANT_INV_STAG;
} else {
*layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
*ecode = RDMAP_INV_STAG;
}
break;
case TPT_ERR_PDID:
*layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
if ((opcode == T3_SEND_WITH_INV) ||
(opcode == T3_SEND_WITH_SE_INV))
*ecode = RDMAP_CANT_INV_STAG;
else
*ecode = RDMAP_STAG_NOT_ASSOC;
break;
case TPT_ERR_QPID:
*layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
*ecode = RDMAP_STAG_NOT_ASSOC;
break;
case TPT_ERR_ACCESS:
*layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
*ecode = RDMAP_ACC_VIOL;
break;
case TPT_ERR_WRAP:
*layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
*ecode = RDMAP_TO_WRAP;
break;
case TPT_ERR_BOUND:
if (tagged) {
*layer_type = LAYER_DDP|DDP_TAGGED_ERR;
*ecode = DDPT_BASE_BOUNDS;
} else {
*layer_type = LAYER_RDMAP|RDMAP_REMOTE_PROT;
*ecode = RDMAP_BASE_BOUNDS;
}
break;
case TPT_ERR_INVALIDATE_SHARED_MR:
case TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND:
*layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
*ecode = RDMAP_CANT_INV_STAG;
break;
case TPT_ERR_ECC:
case TPT_ERR_ECC_PSTAG:
case TPT_ERR_INTERNAL_ERR:
*layer_type = LAYER_RDMAP|RDMAP_LOCAL_CATA;
*ecode = 0;
break;
case TPT_ERR_OUT_OF_RQE:
*layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
*ecode = DDPU_INV_MSN_NOBUF;
break;
case TPT_ERR_PBL_ADDR_BOUND:
*layer_type = LAYER_DDP|DDP_TAGGED_ERR;
*ecode = DDPT_BASE_BOUNDS;
break;
case TPT_ERR_CRC:
*layer_type = LAYER_MPA|DDP_LLP;
*ecode = MPA_CRC_ERR;
break;
case TPT_ERR_MARKER:
*layer_type = LAYER_MPA|DDP_LLP;
*ecode = MPA_MARKER_ERR;
break;
case TPT_ERR_PDU_LEN_ERR:
*layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
*ecode = DDPU_MSG_TOOBIG;
break;
case TPT_ERR_DDP_VERSION:
if (tagged) {
*layer_type = LAYER_DDP|DDP_TAGGED_ERR;
*ecode = DDPT_INV_VERS;
} else {
*layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
*ecode = DDPU_INV_VERS;
}
break;
case TPT_ERR_RDMA_VERSION:
*layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
*ecode = RDMAP_INV_VERS;
break;
case TPT_ERR_OPCODE:
*layer_type = LAYER_RDMAP|RDMAP_REMOTE_OP;
*ecode = RDMAP_INV_OPCODE;
break;
case TPT_ERR_DDP_QUEUE_NUM:
*layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
*ecode = DDPU_INV_QN;
break;
case TPT_ERR_MSN:
case TPT_ERR_MSN_GAP:
case TPT_ERR_MSN_RANGE:
case TPT_ERR_IRD_OVERFLOW:
*layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
*ecode = DDPU_INV_MSN_RANGE;
break;
case TPT_ERR_TBIT:
*layer_type = LAYER_DDP|DDP_LOCAL_CATA;
*ecode = 0;
break;
case TPT_ERR_MO:
*layer_type = LAYER_DDP|DDP_UNTAGGED_ERR;
*ecode = DDPU_INV_MO;
break;
default:
*layer_type = LAYER_RDMAP|DDP_LOCAL_CATA;
*ecode = 0;
break;
}
}
int iwch_post_zb_read(struct iwch_ep *ep)
{
union t3_wr *wqe;
struct sk_buff *skb;
u8 flit_cnt = sizeof(struct t3_rdma_read_wr) >> 3;
pr_debug("%s enter\n", __func__);
skb = alloc_skb(40, GFP_KERNEL);
if (!skb) {
pr_err("%s cannot send zb_read!!\n", __func__);
return -ENOMEM;
}
wqe = skb_put_zero(skb, sizeof(struct t3_rdma_read_wr));
wqe->read.rdmaop = T3_READ_REQ;
wqe->read.reserved[0] = 0;
wqe->read.reserved[1] = 0;
wqe->read.rem_stag = cpu_to_be32(1);
wqe->read.rem_to = cpu_to_be64(1);
wqe->read.local_stag = cpu_to_be32(1);
wqe->read.local_len = cpu_to_be32(0);
wqe->read.local_to = cpu_to_be64(1);
wqe->send.wrh.op_seop_flags = cpu_to_be32(V_FW_RIWR_OP(T3_WR_READ));
wqe->send.wrh.gen_tid_len = cpu_to_be32(V_FW_RIWR_TID(ep->hwtid)|
V_FW_RIWR_LEN(flit_cnt));
skb->priority = CPL_PRIORITY_DATA;
return iwch_cxgb3_ofld_send(ep->com.qp->rhp->rdev.t3cdev_p, skb);
}
/*
* This posts a TERMINATE with layer=RDMA, type=catastrophic.
*/
int iwch_post_terminate(struct iwch_qp *qhp, struct respQ_msg_t *rsp_msg)
{
union t3_wr *wqe;
struct terminate_message *term;
struct sk_buff *skb;
pr_debug("%s %d\n", __func__, __LINE__);
skb = alloc_skb(40, GFP_ATOMIC);
if (!skb) {
pr_err("%s cannot send TERMINATE!\n", __func__);
return -ENOMEM;
}
wqe = skb_put_zero(skb, 40);
wqe->send.rdmaop = T3_TERMINATE;
/* immediate data length */
wqe->send.plen = htonl(4);
/* immediate data starts here. */
term = (struct terminate_message *)wqe->send.sgl;
build_term_codes(rsp_msg, &term->layer_etype, &term->ecode);
wqe->send.wrh.op_seop_flags = cpu_to_be32(V_FW_RIWR_OP(T3_WR_SEND) |
V_FW_RIWR_FLAGS(T3_COMPLETION_FLAG | T3_NOTIFY_FLAG));
wqe->send.wrh.gen_tid_len = cpu_to_be32(V_FW_RIWR_TID(qhp->ep->hwtid));
skb->priority = CPL_PRIORITY_DATA;
return iwch_cxgb3_ofld_send(qhp->rhp->rdev.t3cdev_p, skb);
}
/*
* Assumes qhp lock is held.
*/
static void __flush_qp(struct iwch_qp *qhp, struct iwch_cq *rchp,
struct iwch_cq *schp)
__releases(&qhp->lock)
__acquires(&qhp->lock)
{
int count;
int flushed;
lockdep_assert_held(&qhp->lock);
pr_debug("%s qhp %p rchp %p schp %p\n", __func__, qhp, rchp, schp);
/* take a ref on the qhp since we must release the lock */
atomic_inc(&qhp->refcnt);
spin_unlock(&qhp->lock);
/* locking hierarchy: cq lock first, then qp lock. */
spin_lock(&rchp->lock);
spin_lock(&qhp->lock);
cxio_flush_hw_cq(&rchp->cq);
cxio_count_rcqes(&rchp->cq, &qhp->wq, &count);
flushed = cxio_flush_rq(&qhp->wq, &rchp->cq, count);
spin_unlock(&qhp->lock);
spin_unlock(&rchp->lock);
if (flushed) {
spin_lock(&rchp->comp_handler_lock);
(*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
spin_unlock(&rchp->comp_handler_lock);
}
/* locking hierarchy: cq lock first, then qp lock. */
spin_lock(&schp->lock);
spin_lock(&qhp->lock);
cxio_flush_hw_cq(&schp->cq);
cxio_count_scqes(&schp->cq, &qhp->wq, &count);
flushed = cxio_flush_sq(&qhp->wq, &schp->cq, count);
spin_unlock(&qhp->lock);
spin_unlock(&schp->lock);
if (flushed) {
spin_lock(&schp->comp_handler_lock);
(*schp->ibcq.comp_handler)(&schp->ibcq, schp->ibcq.cq_context);
spin_unlock(&schp->comp_handler_lock);
}
/* deref */
if (atomic_dec_and_test(&qhp->refcnt))
wake_up(&qhp->wait);
spin_lock(&qhp->lock);
}
static void flush_qp(struct iwch_qp *qhp)
{
struct iwch_cq *rchp, *schp;
rchp = get_chp(qhp->rhp, qhp->attr.rcq);
schp = get_chp(qhp->rhp, qhp->attr.scq);
if (qhp->ibqp.uobject) {
cxio_set_wq_in_error(&qhp->wq);
cxio_set_cq_in_error(&rchp->cq);
spin_lock(&rchp->comp_handler_lock);
(*rchp->ibcq.comp_handler)(&rchp->ibcq, rchp->ibcq.cq_context);
spin_unlock(&rchp->comp_handler_lock);
if (schp != rchp) {
cxio_set_cq_in_error(&schp->cq);
spin_lock(&schp->comp_handler_lock);
(*schp->ibcq.comp_handler)(&schp->ibcq,
schp->ibcq.cq_context);
spin_unlock(&schp->comp_handler_lock);
}
return;
}
__flush_qp(qhp, rchp, schp);
}
/*
* Return count of RECV WRs posted
*/
u16 iwch_rqes_posted(struct iwch_qp *qhp)
{
union t3_wr *wqe = qhp->wq.queue;
u16 count = 0;
while (count < USHRT_MAX && fw_riwrh_opcode((struct fw_riwrh *)wqe) == T3_WR_RCV) {
count++;
wqe++;
}
pr_debug("%s qhp %p count %u\n", __func__, qhp, count);
return count;
}
static int rdma_init(struct iwch_dev *rhp, struct iwch_qp *qhp,
enum iwch_qp_attr_mask mask,
struct iwch_qp_attributes *attrs)
{
struct t3_rdma_init_attr init_attr;
int ret;
init_attr.tid = qhp->ep->hwtid;
init_attr.qpid = qhp->wq.qpid;
init_attr.pdid = qhp->attr.pd;
init_attr.scqid = qhp->attr.scq;
init_attr.rcqid = qhp->attr.rcq;
init_attr.rq_addr = qhp->wq.rq_addr;
init_attr.rq_size = 1 << qhp->wq.rq_size_log2;
init_attr.mpaattrs = uP_RI_MPA_IETF_ENABLE |
qhp->attr.mpa_attr.recv_marker_enabled |
(qhp->attr.mpa_attr.xmit_marker_enabled << 1) |
(qhp->attr.mpa_attr.crc_enabled << 2);
init_attr.qpcaps = uP_RI_QP_RDMA_READ_ENABLE |
uP_RI_QP_RDMA_WRITE_ENABLE |
uP_RI_QP_BIND_ENABLE;
if (!qhp->ibqp.uobject)
init_attr.qpcaps |= uP_RI_QP_STAG0_ENABLE |
uP_RI_QP_FAST_REGISTER_ENABLE;
init_attr.tcp_emss = qhp->ep->emss;
init_attr.ord = qhp->attr.max_ord;
init_attr.ird = qhp->attr.max_ird;
init_attr.qp_dma_addr = qhp->wq.dma_addr;
init_attr.qp_dma_size = (1UL << qhp->wq.size_log2);
init_attr.rqe_count = iwch_rqes_posted(qhp);
init_attr.flags = qhp->attr.mpa_attr.initiator ? MPA_INITIATOR : 0;
init_attr.chan = qhp->ep->l2t->smt_idx;
if (peer2peer) {
init_attr.rtr_type = RTR_READ;
if (init_attr.ord == 0 && qhp->attr.mpa_attr.initiator)
init_attr.ord = 1;
if (init_attr.ird == 0 && !qhp->attr.mpa_attr.initiator)
init_attr.ird = 1;
} else
init_attr.rtr_type = 0;
init_attr.irs = qhp->ep->rcv_seq;
pr_debug("%s init_attr.rq_addr 0x%x init_attr.rq_size = %d flags 0x%x qpcaps 0x%x\n",
__func__,
init_attr.rq_addr, init_attr.rq_size,
init_attr.flags, init_attr.qpcaps);
ret = cxio_rdma_init(&rhp->rdev, &init_attr);
pr_debug("%s ret %d\n", __func__, ret);
return ret;
}
int iwch_modify_qp(struct iwch_dev *rhp, struct iwch_qp *qhp,
enum iwch_qp_attr_mask mask,
struct iwch_qp_attributes *attrs,
int internal)
{
int ret = 0;
struct iwch_qp_attributes newattr = qhp->attr;
unsigned long flag;
int disconnect = 0;
int terminate = 0;
int abort = 0;
int free = 0;
struct iwch_ep *ep = NULL;
pr_debug("%s qhp %p qpid 0x%x ep %p state %d -> %d\n", __func__,
qhp, qhp->wq.qpid, qhp->ep, qhp->attr.state,
(mask & IWCH_QP_ATTR_NEXT_STATE) ? attrs->next_state : -1);
spin_lock_irqsave(&qhp->lock, flag);
/* Process attr changes if in IDLE */
if (mask & IWCH_QP_ATTR_VALID_MODIFY) {
if (qhp->attr.state != IWCH_QP_STATE_IDLE) {
ret = -EIO;
goto out;
}
if (mask & IWCH_QP_ATTR_ENABLE_RDMA_READ)
newattr.enable_rdma_read = attrs->enable_rdma_read;
if (mask & IWCH_QP_ATTR_ENABLE_RDMA_WRITE)
newattr.enable_rdma_write = attrs->enable_rdma_write;
if (mask & IWCH_QP_ATTR_ENABLE_RDMA_BIND)
newattr.enable_bind = attrs->enable_bind;
if (mask & IWCH_QP_ATTR_MAX_ORD) {
if (attrs->max_ord >
rhp->attr.max_rdma_read_qp_depth) {
ret = -EINVAL;
goto out;
}
newattr.max_ord = attrs->max_ord;
}
if (mask & IWCH_QP_ATTR_MAX_IRD) {
if (attrs->max_ird >
rhp->attr.max_rdma_reads_per_qp) {
ret = -EINVAL;
goto out;
}
newattr.max_ird = attrs->max_ird;
}
qhp->attr = newattr;
}
if (!(mask & IWCH_QP_ATTR_NEXT_STATE))
goto out;
if (qhp->attr.state == attrs->next_state)
goto out;
switch (qhp->attr.state) {
case IWCH_QP_STATE_IDLE:
switch (attrs->next_state) {
case IWCH_QP_STATE_RTS:
if (!(mask & IWCH_QP_ATTR_LLP_STREAM_HANDLE)) {
ret = -EINVAL;
goto out;
}
if (!(mask & IWCH_QP_ATTR_MPA_ATTR)) {
ret = -EINVAL;
goto out;
}
qhp->attr.mpa_attr = attrs->mpa_attr;
qhp->attr.llp_stream_handle = attrs->llp_stream_handle;
qhp->ep = qhp->attr.llp_stream_handle;
qhp->attr.state = IWCH_QP_STATE_RTS;
/*
* Ref the endpoint here and deref when we
* disassociate the endpoint from the QP. This
* happens in CLOSING->IDLE transition or *->ERROR
* transition.
*/
get_ep(&qhp->ep->com);
spin_unlock_irqrestore(&qhp->lock, flag);
ret = rdma_init(rhp, qhp, mask, attrs);
spin_lock_irqsave(&qhp->lock, flag);
if (ret)
goto err;
break;
case IWCH_QP_STATE_ERROR:
qhp->attr.state = IWCH_QP_STATE_ERROR;
flush_qp(qhp);
break;
default:
ret = -EINVAL;
goto out;
}
break;
case IWCH_QP_STATE_RTS:
switch (attrs->next_state) {
case IWCH_QP_STATE_CLOSING:
BUG_ON(kref_read(&qhp->ep->com.kref) < 2);
qhp->attr.state = IWCH_QP_STATE_CLOSING;
if (!internal) {
abort=0;
disconnect = 1;
ep = qhp->ep;
get_ep(&ep->com);
}
break;
case IWCH_QP_STATE_TERMINATE:
qhp->attr.state = IWCH_QP_STATE_TERMINATE;
if (qhp->ibqp.uobject)
cxio_set_wq_in_error(&qhp->wq);
if (!internal)
terminate = 1;
break;
case IWCH_QP_STATE_ERROR:
qhp->attr.state = IWCH_QP_STATE_ERROR;
if (!internal) {
abort=1;
disconnect = 1;
ep = qhp->ep;
get_ep(&ep->com);
}
goto err;
break;
default:
ret = -EINVAL;
goto out;
}
break;
case IWCH_QP_STATE_CLOSING:
if (!internal) {
ret = -EINVAL;
goto out;
}
switch (attrs->next_state) {
case IWCH_QP_STATE_IDLE:
flush_qp(qhp);
qhp->attr.state = IWCH_QP_STATE_IDLE;
qhp->attr.llp_stream_handle = NULL;
put_ep(&qhp->ep->com);
qhp->ep = NULL;
wake_up(&qhp->wait);
break;
case IWCH_QP_STATE_ERROR:
goto err;
default:
ret = -EINVAL;
goto err;
}
break;
case IWCH_QP_STATE_ERROR:
if (attrs->next_state != IWCH_QP_STATE_IDLE) {
ret = -EINVAL;
goto out;
}
if (!Q_EMPTY(qhp->wq.sq_rptr, qhp->wq.sq_wptr) ||
!Q_EMPTY(qhp->wq.rq_rptr, qhp->wq.rq_wptr)) {
ret = -EINVAL;
goto out;
}
qhp->attr.state = IWCH_QP_STATE_IDLE;
break;
case IWCH_QP_STATE_TERMINATE:
if (!internal) {
ret = -EINVAL;
goto out;
}
goto err;
break;
default:
pr_err("%s in a bad state %d\n", __func__, qhp->attr.state);
ret = -EINVAL;
goto err;
break;
}
goto out;
err:
pr_debug("%s disassociating ep %p qpid 0x%x\n", __func__, qhp->ep,
qhp->wq.qpid);
/* disassociate the LLP connection */
qhp->attr.llp_stream_handle = NULL;
ep = qhp->ep;
qhp->ep = NULL;
qhp->attr.state = IWCH_QP_STATE_ERROR;
free=1;
wake_up(&qhp->wait);
BUG_ON(!ep);
flush_qp(qhp);
out:
spin_unlock_irqrestore(&qhp->lock, flag);
if (terminate)
iwch_post_terminate(qhp, NULL);
/*
* If disconnect is 1, then we need to initiate a disconnect
* on the EP. This can be a normal close (RTS->CLOSING) or
* an abnormal close (RTS/CLOSING->ERROR).
*/
if (disconnect) {
iwch_ep_disconnect(ep, abort, GFP_KERNEL);
put_ep(&ep->com);
}
/*
* If free is 1, then we've disassociated the EP from the QP
* and we need to dereference the EP.
*/
if (free)
put_ep(&ep->com);
pr_debug("%s exit state %d\n", __func__, qhp->attr.state);
return ret;
}
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