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65b07ec293
android_kernel_xiaomi_sm8350/drivers/infiniband/hw/nes/nes_verbs.c
Adrian Bunk 65b07ec293 RDMA/nes: Fix off-by-one 
Fix an off-by-one spotted by the Coverity checker.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Glenn Streiff <gstreiff@neteffect.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-02-25 16:00:30 -08:00

3919 lines
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/*
* Copyright (c) 2006 - 2008 NetEffect, 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/module.h>
#include <linux/moduleparam.h>
#include <linux/random.h>
#include <linux/highmem.h>
#include <asm/byteorder.h>
#include <rdma/ib_verbs.h>
#include <rdma/iw_cm.h>
#include <rdma/ib_user_verbs.h>
#include "nes.h"
#include <rdma/ib_umem.h>
atomic_t mod_qp_timouts;
atomic_t qps_created;
atomic_t sw_qps_destroyed;
/**
* nes_alloc_mw
*/
static struct ib_mw *nes_alloc_mw(struct ib_pd *ibpd) {
unsigned long flags;
struct nes_pd *nespd = to_nespd(ibpd);
struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
struct nes_cqp_request *cqp_request;
struct nes_mr *nesmr;
struct ib_mw *ibmw;
struct nes_hw_cqp_wqe *cqp_wqe;
int ret;
u32 stag;
u32 stag_index = 0;
u32 next_stag_index = 0;
u32 driver_key = 0;
u8 stag_key = 0;
get_random_bytes(&next_stag_index, sizeof(next_stag_index));
stag_key = (u8)next_stag_index;
driver_key = 0;
next_stag_index >>= 8;
next_stag_index %= nesadapter->max_mr;
ret = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
nesadapter->max_mr, &stag_index, &next_stag_index);
if (ret) {
return ERR_PTR(ret);
}
nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
if (!nesmr) {
nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
return ERR_PTR(-ENOMEM);
}
stag = stag_index << 8;
stag |= driver_key;
stag += (u32)stag_key;
nes_debug(NES_DBG_MR, "Registering STag 0x%08X, index = 0x%08X\n",
stag, stag_index);
/* Register the region with the adapter */
cqp_request = nes_get_cqp_request(nesdev);
if (cqp_request == NULL) {
kfree(nesmr);
nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
return ERR_PTR(-ENOMEM);
}
cqp_request->waiting = 1;
cqp_wqe = &cqp_request->cqp_wqe;
cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] =
cpu_to_le32( NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_RIGHTS_REMOTE_READ |
NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_VA_TO |
NES_CQP_STAG_REM_ACC_EN);
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX, (nespd->pd_id & 0x00007fff));
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
atomic_set(&cqp_request->refcount, 2);
nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
/* Wait for CQP */
ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
NES_EVENT_TIMEOUT);
nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
" CQP Major:Minor codes = 0x%04X:0x%04X.\n",
stag, ret, cqp_request->major_code, cqp_request->minor_code);
if ((!ret) || (cqp_request->major_code)) {
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
kfree(nesmr);
nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
if (!ret) {
return ERR_PTR(-ETIME);
} else {
return ERR_PTR(-ENOMEM);
}
} else {
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
}
nesmr->ibmw.rkey = stag;
nesmr->mode = IWNES_MEMREG_TYPE_MW;
ibmw = &nesmr->ibmw;
nesmr->pbl_4k = 0;
nesmr->pbls_used = 0;
return ibmw;
}
/**
* nes_dealloc_mw
*/
static int nes_dealloc_mw(struct ib_mw *ibmw)
{
struct nes_mr *nesmr = to_nesmw(ibmw);
struct nes_vnic *nesvnic = to_nesvnic(ibmw->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
struct nes_hw_cqp_wqe *cqp_wqe;
struct nes_cqp_request *cqp_request;
int err = 0;
unsigned long flags;
int ret;
/* Deallocate the window with the adapter */
cqp_request = nes_get_cqp_request(nesdev);
if (cqp_request == NULL) {
nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
return -ENOMEM;
}
cqp_request->waiting = 1;
cqp_wqe = &cqp_request->cqp_wqe;
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, NES_CQP_DEALLOCATE_STAG);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ibmw->rkey);
atomic_set(&cqp_request->refcount, 2);
nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
/* Wait for CQP */
nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X to complete.\n",
ibmw->rkey);
ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
NES_EVENT_TIMEOUT);
nes_debug(NES_DBG_MR, "Deallocate STag completed, wait_event_timeout ret = %u,"
" CQP Major:Minor codes = 0x%04X:0x%04X.\n",
ret, cqp_request->major_code, cqp_request->minor_code);
if ((!ret) || (cqp_request->major_code)) {
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
if (!ret) {
err = -ETIME;
} else {
err = -EIO;
}
} else {
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
}
nes_free_resource(nesadapter, nesadapter->allocated_mrs,
(ibmw->rkey & 0x0fffff00) >> 8);
kfree(nesmr);
return err;
}
/**
* nes_bind_mw
*/
static int nes_bind_mw(struct ib_qp *ibqp, struct ib_mw *ibmw,
struct ib_mw_bind *ibmw_bind)
{
u64 u64temp;
struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
struct nes_device *nesdev = nesvnic->nesdev;
/* struct nes_mr *nesmr = to_nesmw(ibmw); */
struct nes_qp *nesqp = to_nesqp(ibqp);
struct nes_hw_qp_wqe *wqe;
unsigned long flags = 0;
u32 head;
u32 wqe_misc = 0;
u32 qsize;
if (nesqp->ibqp_state > IB_QPS_RTS)
return -EINVAL;
spin_lock_irqsave(&nesqp->lock, flags);
head = nesqp->hwqp.sq_head;
qsize = nesqp->hwqp.sq_tail;
/* Check for SQ overflow */
if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
spin_unlock_irqrestore(&nesqp->lock, flags);
return -EINVAL;
}
wqe = &nesqp->hwqp.sq_vbase[head];
/* nes_debug(NES_DBG_MR, "processing sq wqe at %p, head = %u.\n", wqe, head); */
nes_fill_init_qp_wqe(wqe, nesqp, head);
u64temp = ibmw_bind->wr_id;
set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX, u64temp);
wqe_misc = NES_IWARP_SQ_OP_BIND;
wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
if (ibmw_bind->send_flags & IB_SEND_SIGNALED)
wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
if (ibmw_bind->mw_access_flags & IB_ACCESS_REMOTE_WRITE) {
wqe_misc |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE;
}
if (ibmw_bind->mw_access_flags & IB_ACCESS_REMOTE_READ) {
wqe_misc |= NES_CQP_STAG_RIGHTS_REMOTE_READ;
}
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_MISC_IDX, wqe_misc);
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_MR_IDX, ibmw_bind->mr->lkey);
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_MW_IDX, ibmw->rkey);
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_LENGTH_LOW_IDX,
ibmw_bind->length);
wqe->wqe_words[NES_IWARP_SQ_BIND_WQE_LENGTH_HIGH_IDX] = 0;
u64temp = (u64)ibmw_bind->addr;
set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_BIND_WQE_VA_FBO_LOW_IDX, u64temp);
head++;
if (head >= qsize)
head = 0;
nesqp->hwqp.sq_head = head;
barrier();
nes_write32(nesdev->regs+NES_WQE_ALLOC,
(1 << 24) | 0x00800000 | nesqp->hwqp.qp_id);
spin_unlock_irqrestore(&nesqp->lock, flags);
return 0;
}
/**
* nes_alloc_fmr
*/
static struct ib_fmr *nes_alloc_fmr(struct ib_pd *ibpd,
int ibmr_access_flags,
struct ib_fmr_attr *ibfmr_attr)
{
unsigned long flags;
struct nes_pd *nespd = to_nespd(ibpd);
struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
struct nes_fmr *nesfmr;
struct nes_cqp_request *cqp_request;
struct nes_hw_cqp_wqe *cqp_wqe;
int ret;
u32 stag;
u32 stag_index = 0;
u32 next_stag_index = 0;
u32 driver_key = 0;
u32 opcode = 0;
u8 stag_key = 0;
int i=0;
struct nes_vpbl vpbl;
get_random_bytes(&next_stag_index, sizeof(next_stag_index));
stag_key = (u8)next_stag_index;
driver_key = 0;
next_stag_index >>= 8;
next_stag_index %= nesadapter->max_mr;
ret = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
nesadapter->max_mr, &stag_index, &next_stag_index);
if (ret) {
goto failed_resource_alloc;
}
nesfmr = kzalloc(sizeof(*nesfmr), GFP_KERNEL);
if (!nesfmr) {
ret = -ENOMEM;
goto failed_fmr_alloc;
}
nesfmr->nesmr.mode = IWNES_MEMREG_TYPE_FMR;
if (ibfmr_attr->max_pages == 1) {
/* use zero length PBL */
nesfmr->nesmr.pbl_4k = 0;
nesfmr->nesmr.pbls_used = 0;
} else if (ibfmr_attr->max_pages <= 32) {
/* use PBL 256 */
nesfmr->nesmr.pbl_4k = 0;
nesfmr->nesmr.pbls_used = 1;
} else if (ibfmr_attr->max_pages <= 512) {
/* use 4K PBLs */
nesfmr->nesmr.pbl_4k = 1;
nesfmr->nesmr.pbls_used = 1;
} else {
/* use two level 4K PBLs */
/* add support for two level 256B PBLs */
nesfmr->nesmr.pbl_4k = 1;
nesfmr->nesmr.pbls_used = 1 + (ibfmr_attr->max_pages >> 9) +
((ibfmr_attr->max_pages & 511) ? 1 : 0);
}
/* Register the region with the adapter */
spin_lock_irqsave(&nesadapter->pbl_lock, flags);
/* track PBL resources */
if (nesfmr->nesmr.pbls_used != 0) {
if (nesfmr->nesmr.pbl_4k) {
if (nesfmr->nesmr.pbls_used > nesadapter->free_4kpbl) {
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
ret = -ENOMEM;
goto failed_vpbl_alloc;
} else {
nesadapter->free_4kpbl -= nesfmr->nesmr.pbls_used;
}
} else {
if (nesfmr->nesmr.pbls_used > nesadapter->free_256pbl) {
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
ret = -ENOMEM;
goto failed_vpbl_alloc;
} else {
nesadapter->free_256pbl -= nesfmr->nesmr.pbls_used;
}
}
}
/* one level pbl */
if (nesfmr->nesmr.pbls_used == 0) {
nesfmr->root_vpbl.pbl_vbase = NULL;
nes_debug(NES_DBG_MR, "zero level pbl \n");
} else if (nesfmr->nesmr.pbls_used == 1) {
/* can change it to kmalloc & dma_map_single */
nesfmr->root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
&nesfmr->root_vpbl.pbl_pbase);
if (!nesfmr->root_vpbl.pbl_vbase) {
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
ret = -ENOMEM;
goto failed_vpbl_alloc;
}
nesfmr->leaf_pbl_cnt = 0;
nes_debug(NES_DBG_MR, "one level pbl, root_vpbl.pbl_vbase=%p \n",
nesfmr->root_vpbl.pbl_vbase);
}
/* two level pbl */
else {
nesfmr->root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 8192,
&nesfmr->root_vpbl.pbl_pbase);
if (!nesfmr->root_vpbl.pbl_vbase) {
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
ret = -ENOMEM;
goto failed_vpbl_alloc;
}
nesfmr->root_vpbl.leaf_vpbl = kzalloc(sizeof(*nesfmr->root_vpbl.leaf_vpbl)*1024, GFP_KERNEL);
if (!nesfmr->root_vpbl.leaf_vpbl) {
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
ret = -ENOMEM;
goto failed_leaf_vpbl_alloc;
}
nesfmr->leaf_pbl_cnt = nesfmr->nesmr.pbls_used-1;
nes_debug(NES_DBG_MR, "two level pbl, root_vpbl.pbl_vbase=%p"
" leaf_pbl_cnt=%d root_vpbl.leaf_vpbl=%p\n",
nesfmr->root_vpbl.pbl_vbase, nesfmr->leaf_pbl_cnt, nesfmr->root_vpbl.leaf_vpbl);
for (i=0; i<nesfmr->leaf_pbl_cnt; i++)
nesfmr->root_vpbl.leaf_vpbl[i].pbl_vbase = NULL;
for (i=0; i<nesfmr->leaf_pbl_cnt; i++) {
vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
&vpbl.pbl_pbase);
if (!vpbl.pbl_vbase) {
ret = -ENOMEM;
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
goto failed_leaf_vpbl_pages_alloc;
}
nesfmr->root_vpbl.pbl_vbase[i].pa_low = cpu_to_le32((u32)vpbl.pbl_pbase);
nesfmr->root_vpbl.pbl_vbase[i].pa_high = cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
nesfmr->root_vpbl.leaf_vpbl[i] = vpbl;
nes_debug(NES_DBG_MR, "pbase_low=0x%x, pbase_high=0x%x, vpbl=%p\n",
nesfmr->root_vpbl.pbl_vbase[i].pa_low,
nesfmr->root_vpbl.pbl_vbase[i].pa_high,
&nesfmr->root_vpbl.leaf_vpbl[i]);
}
}
nesfmr->ib_qp = NULL;
nesfmr->access_rights =0;
stag = stag_index << 8;
stag |= driver_key;
stag += (u32)stag_key;
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
cqp_request = nes_get_cqp_request(nesdev);
if (cqp_request == NULL) {
nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
ret = -ENOMEM;
goto failed_leaf_vpbl_pages_alloc;
}
cqp_request->waiting = 1;
cqp_wqe = &cqp_request->cqp_wqe;
nes_debug(NES_DBG_MR, "Registering STag 0x%08X, index = 0x%08X\n",
stag, stag_index);
opcode = NES_CQP_ALLOCATE_STAG | NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
if (nesfmr->nesmr.pbl_4k == 1)
opcode |= NES_CQP_STAG_PBL_BLK_SIZE;
if (ibmr_access_flags & IB_ACCESS_REMOTE_WRITE) {
opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE |
NES_CQP_STAG_RIGHTS_LOCAL_WRITE | NES_CQP_STAG_REM_ACC_EN;
nesfmr->access_rights |=
NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_RIGHTS_LOCAL_WRITE |
NES_CQP_STAG_REM_ACC_EN;
}
if (ibmr_access_flags & IB_ACCESS_REMOTE_READ) {
opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ |
NES_CQP_STAG_RIGHTS_LOCAL_READ | NES_CQP_STAG_REM_ACC_EN;
nesfmr->access_rights |=
NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_RIGHTS_LOCAL_READ |
NES_CQP_STAG_REM_ACC_EN;
}
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX, (nespd->pd_id & 0x00007fff));
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
cqp_wqe->wqe_words[NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX] =
cpu_to_le32((nesfmr->nesmr.pbls_used>1) ?
(nesfmr->nesmr.pbls_used-1) : nesfmr->nesmr.pbls_used);
atomic_set(&cqp_request->refcount, 2);
nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
/* Wait for CQP */
ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
NES_EVENT_TIMEOUT);
nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
" CQP Major:Minor codes = 0x%04X:0x%04X.\n",
stag, ret, cqp_request->major_code, cqp_request->minor_code);
if ((!ret) || (cqp_request->major_code)) {
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
ret = (!ret) ? -ETIME : -EIO;
goto failed_leaf_vpbl_pages_alloc;
} else {
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
}
nesfmr->nesmr.ibfmr.lkey = stag;
nesfmr->nesmr.ibfmr.rkey = stag;
nesfmr->attr = *ibfmr_attr;
return &nesfmr->nesmr.ibfmr;
failed_leaf_vpbl_pages_alloc:
/* unroll all allocated pages */
for (i=0; i<nesfmr->leaf_pbl_cnt; i++) {
if (nesfmr->root_vpbl.leaf_vpbl[i].pbl_vbase) {
pci_free_consistent(nesdev->pcidev, 4096, nesfmr->root_vpbl.leaf_vpbl[i].pbl_vbase,
nesfmr->root_vpbl.leaf_vpbl[i].pbl_pbase);
}
}
if (nesfmr->root_vpbl.leaf_vpbl)
kfree(nesfmr->root_vpbl.leaf_vpbl);
failed_leaf_vpbl_alloc:
if (nesfmr->leaf_pbl_cnt == 0) {
if (nesfmr->root_vpbl.pbl_vbase)
pci_free_consistent(nesdev->pcidev, 4096, nesfmr->root_vpbl.pbl_vbase,
nesfmr->root_vpbl.pbl_pbase);
} else
pci_free_consistent(nesdev->pcidev, 8192, nesfmr->root_vpbl.pbl_vbase,
nesfmr->root_vpbl.pbl_pbase);
failed_vpbl_alloc:
kfree(nesfmr);
failed_fmr_alloc:
nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
failed_resource_alloc:
return ERR_PTR(ret);
}
/**
* nes_dealloc_fmr
*/
static int nes_dealloc_fmr(struct ib_fmr *ibfmr)
{
struct nes_mr *nesmr = to_nesmr_from_ibfmr(ibfmr);
struct nes_fmr *nesfmr = to_nesfmr(nesmr);
struct nes_vnic *nesvnic = to_nesvnic(ibfmr->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_mr temp_nesmr = *nesmr;
int i = 0;
temp_nesmr.ibmw.device = ibfmr->device;
temp_nesmr.ibmw.pd = ibfmr->pd;
temp_nesmr.ibmw.rkey = ibfmr->rkey;
temp_nesmr.ibmw.uobject = NULL;
/* free the resources */
if (nesfmr->leaf_pbl_cnt == 0) {
/* single PBL case */
if (nesfmr->root_vpbl.pbl_vbase)
pci_free_consistent(nesdev->pcidev, 4096, nesfmr->root_vpbl.pbl_vbase,
nesfmr->root_vpbl.pbl_pbase);
} else {
for (i = 0; i < nesfmr->leaf_pbl_cnt; i++) {
pci_free_consistent(nesdev->pcidev, 4096, nesfmr->root_vpbl.leaf_vpbl[i].pbl_vbase,
nesfmr->root_vpbl.leaf_vpbl[i].pbl_pbase);
}
kfree(nesfmr->root_vpbl.leaf_vpbl);
pci_free_consistent(nesdev->pcidev, 8192, nesfmr->root_vpbl.pbl_vbase,
nesfmr->root_vpbl.pbl_pbase);
}
return nes_dealloc_mw(&temp_nesmr.ibmw);
}
/**
* nes_map_phys_fmr
*/
static int nes_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
int list_len, u64 iova)
{
return 0;
}
/**
* nes_unmap_frm
*/
static int nes_unmap_fmr(struct list_head *ibfmr_list)
{
return 0;
}
/**
* nes_query_device
*/
static int nes_query_device(struct ib_device *ibdev, struct ib_device_attr *props)
{
struct nes_vnic *nesvnic = to_nesvnic(ibdev);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_ib_device *nesibdev = nesvnic->nesibdev;
memset(props, 0, sizeof(*props));
memcpy(&props->sys_image_guid, nesvnic->netdev->dev_addr, 6);
props->fw_ver = nesdev->nesadapter->fw_ver;
props->device_cap_flags = nesdev->nesadapter->device_cap_flags;
props->vendor_id = nesdev->nesadapter->vendor_id;
props->vendor_part_id = nesdev->nesadapter->vendor_part_id;
props->hw_ver = nesdev->nesadapter->hw_rev;
props->max_mr_size = 0x80000000;
props->max_qp = nesibdev->max_qp;
props->max_qp_wr = nesdev->nesadapter->max_qp_wr - 2;
props->max_sge = nesdev->nesadapter->max_sge;
props->max_cq = nesibdev->max_cq;
props->max_cqe = nesdev->nesadapter->max_cqe - 1;
props->max_mr = nesibdev->max_mr;
props->max_mw = nesibdev->max_mr;
props->max_pd = nesibdev->max_pd;
props->max_sge_rd = 1;
switch (nesdev->nesadapter->max_irrq_wr) {
case 0:
props->max_qp_rd_atom = 1;
break;
case 1:
props->max_qp_rd_atom = 4;
break;
case 2:
props->max_qp_rd_atom = 16;
break;
case 3:
props->max_qp_rd_atom = 32;
break;
default:
props->max_qp_rd_atom = 0;
}
props->max_qp_init_rd_atom = props->max_qp_wr;
props->atomic_cap = IB_ATOMIC_NONE;
props->max_map_per_fmr = 1;
return 0;
}
/**
* nes_query_port
*/
static int nes_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *props)
{
memset(props, 0, sizeof(*props));
props->max_mtu = IB_MTU_2048;
props->active_mtu = IB_MTU_2048;
props->lid = 1;
props->lmc = 0;
props->sm_lid = 0;
props->sm_sl = 0;
props->state = IB_PORT_ACTIVE;
props->phys_state = 0;
props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
props->gid_tbl_len = 1;
props->pkey_tbl_len = 1;
props->qkey_viol_cntr = 0;
props->active_width = IB_WIDTH_4X;
props->active_speed = 1;
props->max_msg_sz = 0x80000000;
return 0;
}
/**
* nes_modify_port
*/
static int nes_modify_port(struct ib_device *ibdev, u8 port,
int port_modify_mask, struct ib_port_modify *props)
{
return 0;
}
/**
* nes_query_pkey
*/
static int nes_query_pkey(struct ib_device *ibdev, u8 port, u16 index, u16 *pkey)
{
*pkey = 0;
return 0;
}
/**
* nes_query_gid
*/
static int nes_query_gid(struct ib_device *ibdev, u8 port,
int index, union ib_gid *gid)
{
struct nes_vnic *nesvnic = to_nesvnic(ibdev);
memset(&(gid->raw[0]), 0, sizeof(gid->raw));
memcpy(&(gid->raw[0]), nesvnic->netdev->dev_addr, 6);
return 0;
}
/**
* nes_alloc_ucontext - Allocate the user context data structure. This keeps track
* of all objects associated with a particular user-mode client.
*/
static struct ib_ucontext *nes_alloc_ucontext(struct ib_device *ibdev,
struct ib_udata *udata)
{
struct nes_vnic *nesvnic = to_nesvnic(ibdev);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
struct nes_alloc_ucontext_req req;
struct nes_alloc_ucontext_resp uresp;
struct nes_ucontext *nes_ucontext;
struct nes_ib_device *nesibdev = nesvnic->nesibdev;
if (ib_copy_from_udata(&req, udata, sizeof(struct nes_alloc_ucontext_req))) {
printk(KERN_ERR PFX "Invalid structure size on allocate user context.\n");
return ERR_PTR(-EINVAL);
}
if (req.userspace_ver != NES_ABI_USERSPACE_VER) {
printk(KERN_ERR PFX "Invalid userspace driver version detected. Detected version %d, should be %d\n",
req.userspace_ver, NES_ABI_USERSPACE_VER);
return ERR_PTR(-EINVAL);
}
memset(&uresp, 0, sizeof uresp);
uresp.max_qps = nesibdev->max_qp;
uresp.max_pds = nesibdev->max_pd;
uresp.wq_size = nesdev->nesadapter->max_qp_wr * 2;
uresp.virtwq = nesadapter->virtwq;
uresp.kernel_ver = NES_ABI_KERNEL_VER;
nes_ucontext = kzalloc(sizeof *nes_ucontext, GFP_KERNEL);
if (!nes_ucontext)
return ERR_PTR(-ENOMEM);
nes_ucontext->nesdev = nesdev;
nes_ucontext->mmap_wq_offset = uresp.max_pds;
nes_ucontext->mmap_cq_offset = nes_ucontext->mmap_wq_offset +
((sizeof(struct nes_hw_qp_wqe) * uresp.max_qps * 2) + PAGE_SIZE-1) /
PAGE_SIZE;
if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
kfree(nes_ucontext);
return ERR_PTR(-EFAULT);
}
INIT_LIST_HEAD(&nes_ucontext->cq_reg_mem_list);
INIT_LIST_HEAD(&nes_ucontext->qp_reg_mem_list);
atomic_set(&nes_ucontext->usecnt, 1);
return &nes_ucontext->ibucontext;
}
/**
* nes_dealloc_ucontext
*/
static int nes_dealloc_ucontext(struct ib_ucontext *context)
{
/* struct nes_vnic *nesvnic = to_nesvnic(context->device); */
/* struct nes_device *nesdev = nesvnic->nesdev; */
struct nes_ucontext *nes_ucontext = to_nesucontext(context);
if (!atomic_dec_and_test(&nes_ucontext->usecnt))
return 0;
kfree(nes_ucontext);
return 0;
}
/**
* nes_mmap
*/
static int nes_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
{
unsigned long index;
struct nes_vnic *nesvnic = to_nesvnic(context->device);
struct nes_device *nesdev = nesvnic->nesdev;
/* struct nes_adapter *nesadapter = nesdev->nesadapter; */
struct nes_ucontext *nes_ucontext;
struct nes_qp *nesqp;
nes_ucontext = to_nesucontext(context);
if (vma->vm_pgoff >= nes_ucontext->mmap_wq_offset) {
index = (vma->vm_pgoff - nes_ucontext->mmap_wq_offset) * PAGE_SIZE;
index /= ((sizeof(struct nes_hw_qp_wqe) * nesdev->nesadapter->max_qp_wr * 2) +
PAGE_SIZE-1) & (~(PAGE_SIZE-1));
if (!test_bit(index, nes_ucontext->allocated_wqs)) {
nes_debug(NES_DBG_MMAP, "wq %lu not allocated\n", index);
return -EFAULT;
}
nesqp = nes_ucontext->mmap_nesqp[index];
if (nesqp == NULL) {
nes_debug(NES_DBG_MMAP, "wq %lu has a NULL QP base.\n", index);
return -EFAULT;
}
if (remap_pfn_range(vma, vma->vm_start,
virt_to_phys(nesqp->hwqp.sq_vbase) >> PAGE_SHIFT,
vma->vm_end - vma->vm_start,
vma->vm_page_prot)) {
nes_debug(NES_DBG_MMAP, "remap_pfn_range failed.\n");
return -EAGAIN;
}
vma->vm_private_data = nesqp;
return 0;
} else {
index = vma->vm_pgoff;
if (!test_bit(index, nes_ucontext->allocated_doorbells))
return -EFAULT;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
if (io_remap_pfn_range(vma, vma->vm_start,
(nesdev->doorbell_start +
((nes_ucontext->mmap_db_index[index] - nesdev->base_doorbell_index) * 4096))
>> PAGE_SHIFT, PAGE_SIZE, vma->vm_page_prot))
return -EAGAIN;
vma->vm_private_data = nes_ucontext;
return 0;
}
return -ENOSYS;
}
/**
* nes_alloc_pd
*/
static struct ib_pd *nes_alloc_pd(struct ib_device *ibdev,
struct ib_ucontext *context, struct ib_udata *udata)
{
struct nes_pd *nespd;
struct nes_vnic *nesvnic = to_nesvnic(ibdev);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
struct nes_ucontext *nesucontext;
struct nes_alloc_pd_resp uresp;
u32 pd_num = 0;
int err;
nes_debug(NES_DBG_PD, "nesvnic=%p, netdev=%p %s, ibdev=%p, context=%p, netdev refcnt=%u\n",
nesvnic, nesdev->netdev[0], nesdev->netdev[0]->name, ibdev, context,
atomic_read(&nesvnic->netdev->refcnt));
err = nes_alloc_resource(nesadapter, nesadapter->allocated_pds,
nesadapter->max_pd, &pd_num, &nesadapter->next_pd);
if (err) {
return ERR_PTR(err);
}
nespd = kzalloc(sizeof (struct nes_pd), GFP_KERNEL);
if (!nespd) {
nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
return ERR_PTR(-ENOMEM);
}
nes_debug(NES_DBG_PD, "Allocating PD (%p) for ib device %s\n",
nespd, nesvnic->nesibdev->ibdev.name);
nespd->pd_id = (pd_num << (PAGE_SHIFT-12)) + nesadapter->base_pd;
if (context) {
nesucontext = to_nesucontext(context);
nespd->mmap_db_index = find_next_zero_bit(nesucontext->allocated_doorbells,
NES_MAX_USER_DB_REGIONS, nesucontext->first_free_db);
nes_debug(NES_DBG_PD, "find_first_zero_biton doorbells returned %u, mapping pd_id %u.\n",
nespd->mmap_db_index, nespd->pd_id);
if (nespd->mmap_db_index >= NES_MAX_USER_DB_REGIONS) {
nes_debug(NES_DBG_PD, "mmap_db_index > MAX\n");
nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
kfree(nespd);
return ERR_PTR(-ENOMEM);
}
uresp.pd_id = nespd->pd_id;
uresp.mmap_db_index = nespd->mmap_db_index;
if (ib_copy_to_udata(udata, &uresp, sizeof (struct nes_alloc_pd_resp))) {
nes_free_resource(nesadapter, nesadapter->allocated_pds, pd_num);
kfree(nespd);
return ERR_PTR(-EFAULT);
}
set_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
nesucontext->mmap_db_index[nespd->mmap_db_index] = nespd->pd_id;
nesucontext->first_free_db = nespd->mmap_db_index + 1;
}
nes_debug(NES_DBG_PD, "PD%u structure located @%p.\n", nespd->pd_id, nespd);
return &nespd->ibpd;
}
/**
* nes_dealloc_pd
*/
static int nes_dealloc_pd(struct ib_pd *ibpd)
{
struct nes_ucontext *nesucontext;
struct nes_pd *nespd = to_nespd(ibpd);
struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
if ((ibpd->uobject) && (ibpd->uobject->context)) {
nesucontext = to_nesucontext(ibpd->uobject->context);
nes_debug(NES_DBG_PD, "Clearing bit %u from allocated doorbells\n",
nespd->mmap_db_index);
clear_bit(nespd->mmap_db_index, nesucontext->allocated_doorbells);
nesucontext->mmap_db_index[nespd->mmap_db_index] = 0;
if (nesucontext->first_free_db > nespd->mmap_db_index) {
nesucontext->first_free_db = nespd->mmap_db_index;
}
}
nes_debug(NES_DBG_PD, "Deallocating PD%u structure located @%p.\n",
nespd->pd_id, nespd);
nes_free_resource(nesadapter, nesadapter->allocated_pds,
(nespd->pd_id-nesadapter->base_pd)>>(PAGE_SHIFT-12));
kfree(nespd);
return 0;
}
/**
* nes_create_ah
*/
static struct ib_ah *nes_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
{
return ERR_PTR(-ENOSYS);
}
/**
* nes_destroy_ah
*/
static int nes_destroy_ah(struct ib_ah *ah)
{
return -ENOSYS;
}
/**
* nes_get_encoded_size
*/
static inline u8 nes_get_encoded_size(int *size)
{
u8 encoded_size = 0;
if (*size <= 32) {
*size = 32;
encoded_size = 1;
} else if (*size <= 128) {
*size = 128;
encoded_size = 2;
} else if (*size <= 512) {
*size = 512;
encoded_size = 3;
}
return (encoded_size);
}
/**
* nes_setup_virt_qp
*/
static int nes_setup_virt_qp(struct nes_qp *nesqp, struct nes_pbl *nespbl,
struct nes_vnic *nesvnic, int sq_size, int rq_size)
{
unsigned long flags;
void *mem;
__le64 *pbl = NULL;
__le64 *tpbl;
__le64 *pblbuffer;
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
u32 pbl_entries;
u8 rq_pbl_entries;
u8 sq_pbl_entries;
pbl_entries = nespbl->pbl_size >> 3;
nes_debug(NES_DBG_QP, "Userspace PBL, pbl_size=%u, pbl_entries = %d pbl_vbase=%p, pbl_pbase=%p\n",
nespbl->pbl_size, pbl_entries,
(void *)nespbl->pbl_vbase,
(void *)nespbl->pbl_pbase);
pbl = (__le64 *) nespbl->pbl_vbase; /* points to first pbl entry */
/* now lets set the sq_vbase as well as rq_vbase addrs we will assign */
/* the first pbl to be fro the rq_vbase... */
rq_pbl_entries = (rq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
sq_pbl_entries = (sq_size * sizeof(struct nes_hw_qp_wqe)) >> 12;
nesqp->hwqp.sq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
if (!nespbl->page) {
nes_debug(NES_DBG_QP, "QP nespbl->page is NULL \n");
kfree(nespbl);
return -ENOMEM;
}
nesqp->hwqp.sq_vbase = kmap(nespbl->page);
nesqp->page = nespbl->page;
if (!nesqp->hwqp.sq_vbase) {
nes_debug(NES_DBG_QP, "QP sq_vbase kmap failed\n");
kfree(nespbl);
return -ENOMEM;
}
/* Now to get to sq.. we need to calculate how many */
/* PBL entries were used by the rq.. */
pbl += sq_pbl_entries;
nesqp->hwqp.rq_pbase = (le32_to_cpu(((__le32 *)pbl)[0])) | ((u64)((le32_to_cpu(((__le32 *)pbl)[1]))) << 32);
/* nesqp->hwqp.rq_vbase = bus_to_virt(*pbl); */
/*nesqp->hwqp.rq_vbase = phys_to_virt(*pbl); */
nes_debug(NES_DBG_QP, "QP sq_vbase= %p sq_pbase=%p rq_vbase=%p rq_pbase=%p\n",
nesqp->hwqp.sq_vbase, (void *)nesqp->hwqp.sq_pbase,
nesqp->hwqp.rq_vbase, (void *)nesqp->hwqp.rq_pbase);
spin_lock_irqsave(&nesadapter->pbl_lock, flags);
if (!nesadapter->free_256pbl) {
pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
nespbl->pbl_pbase);
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
kunmap(nesqp->page);
kfree(nespbl);
return -ENOMEM;
}
nesadapter->free_256pbl--;
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
nesqp->pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 256, &nesqp->pbl_pbase);
pblbuffer = nesqp->pbl_vbase;
if (!nesqp->pbl_vbase) {
/* memory allocated during nes_reg_user_mr() */
pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
nespbl->pbl_pbase);
kfree(nespbl);
spin_lock_irqsave(&nesadapter->pbl_lock, flags);
nesadapter->free_256pbl++;
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
kunmap(nesqp->page);
return -ENOMEM;
}
memset(nesqp->pbl_vbase, 0, 256);
/* fill in the page address in the pbl buffer.. */
tpbl = pblbuffer + 16;
pbl = (__le64 *)nespbl->pbl_vbase;
while (sq_pbl_entries--)
*tpbl++ = *pbl++;
tpbl = pblbuffer;
while (rq_pbl_entries--)
*tpbl++ = *pbl++;
/* done with memory allocated during nes_reg_user_mr() */
pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
nespbl->pbl_pbase);
kfree(nespbl);
nesqp->qp_mem_size =
max((u32)sizeof(struct nes_qp_context), ((u32)256)) + 256; /* this is Q2 */
/* Round up to a multiple of a page */
nesqp->qp_mem_size += PAGE_SIZE - 1;
nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
&nesqp->hwqp.q2_pbase);
if (!mem) {
pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase);
nesqp->pbl_vbase = NULL;
spin_lock_irqsave(&nesadapter->pbl_lock, flags);
nesadapter->free_256pbl++;
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
kunmap(nesqp->page);
return -ENOMEM;
}
nesqp->hwqp.q2_vbase = mem;
mem += 256;
memset(nesqp->hwqp.q2_vbase, 0, 256);
nesqp->nesqp_context = mem;
memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
return 0;
}
/**
* nes_setup_mmap_qp
*/
static int nes_setup_mmap_qp(struct nes_qp *nesqp, struct nes_vnic *nesvnic,
int sq_size, int rq_size)
{
void *mem;
struct nes_device *nesdev = nesvnic->nesdev;
nesqp->qp_mem_size = (sizeof(struct nes_hw_qp_wqe) * sq_size) +
(sizeof(struct nes_hw_qp_wqe) * rq_size) +
max((u32)sizeof(struct nes_qp_context), ((u32)256)) +
256; /* this is Q2 */
/* Round up to a multiple of a page */
nesqp->qp_mem_size += PAGE_SIZE - 1;
nesqp->qp_mem_size &= ~(PAGE_SIZE - 1);
mem = pci_alloc_consistent(nesdev->pcidev, nesqp->qp_mem_size,
&nesqp->hwqp.sq_pbase);
if (!mem)
return -ENOMEM;
nes_debug(NES_DBG_QP, "PCI consistent memory for "
"host descriptor rings located @ %p (pa = 0x%08lX.) size = %u.\n",
mem, (unsigned long)nesqp->hwqp.sq_pbase, nesqp->qp_mem_size);
memset(mem, 0, nesqp->qp_mem_size);
nesqp->hwqp.sq_vbase = mem;
mem += sizeof(struct nes_hw_qp_wqe) * sq_size;
nesqp->hwqp.rq_vbase = mem;
nesqp->hwqp.rq_pbase = nesqp->hwqp.sq_pbase +
sizeof(struct nes_hw_qp_wqe) * sq_size;
mem += sizeof(struct nes_hw_qp_wqe) * rq_size;
nesqp->hwqp.q2_vbase = mem;
nesqp->hwqp.q2_pbase = nesqp->hwqp.rq_pbase +
sizeof(struct nes_hw_qp_wqe) * rq_size;
mem += 256;
memset(nesqp->hwqp.q2_vbase, 0, 256);
nesqp->nesqp_context = mem;
nesqp->nesqp_context_pbase = nesqp->hwqp.q2_pbase + 256;
memset(nesqp->nesqp_context, 0, sizeof(*nesqp->nesqp_context));
return 0;
}
/**
* nes_free_qp_mem() is to free up the qp's pci_alloc_consistent() memory.
*/
static inline void nes_free_qp_mem(struct nes_device *nesdev,
struct nes_qp *nesqp, int virt_wqs)
{
unsigned long flags;
struct nes_adapter *nesadapter = nesdev->nesadapter;
if (!virt_wqs) {
pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size,
nesqp->hwqp.sq_vbase, nesqp->hwqp.sq_pbase);
}else {
spin_lock_irqsave(&nesadapter->pbl_lock, flags);
nesadapter->free_256pbl++;
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
pci_free_consistent(nesdev->pcidev, nesqp->qp_mem_size, nesqp->hwqp.q2_vbase, nesqp->hwqp.q2_pbase);
pci_free_consistent(nesdev->pcidev, 256, nesqp->pbl_vbase, nesqp->pbl_pbase );
nesqp->pbl_vbase = NULL;
kunmap(nesqp->page);
}
}
/**
* nes_create_qp
*/
static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
struct ib_qp_init_attr *init_attr, struct ib_udata *udata)
{
u64 u64temp= 0;
u64 u64nesqp = 0;
struct nes_pd *nespd = to_nespd(ibpd);
struct nes_vnic *nesvnic = to_nesvnic(ibpd->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
struct nes_qp *nesqp;
struct nes_cq *nescq;
struct nes_ucontext *nes_ucontext;
struct nes_hw_cqp_wqe *cqp_wqe;
struct nes_cqp_request *cqp_request;
struct nes_create_qp_req req;
struct nes_create_qp_resp uresp;
struct nes_pbl *nespbl = NULL;
u32 qp_num = 0;
u32 opcode = 0;
/* u32 counter = 0; */
void *mem;
unsigned long flags;
int ret;
int err;
int virt_wqs = 0;
int sq_size;
int rq_size;
u8 sq_encoded_size;
u8 rq_encoded_size;
/* int counter; */
atomic_inc(&qps_created);
switch (init_attr->qp_type) {
case IB_QPT_RC:
if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
init_attr->cap.max_inline_data = 0;
} else {
init_attr->cap.max_inline_data = 64;
}
sq_size = init_attr->cap.max_send_wr;
rq_size = init_attr->cap.max_recv_wr;
// check if the encoded sizes are OK or not...
sq_encoded_size = nes_get_encoded_size(&sq_size);
rq_encoded_size = nes_get_encoded_size(&rq_size);
if ((!sq_encoded_size) || (!rq_encoded_size)) {
nes_debug(NES_DBG_QP, "ERROR bad rq (%u) or sq (%u) size\n",
rq_size, sq_size);
return ERR_PTR(-EINVAL);
}
init_attr->cap.max_send_wr = sq_size -2;
init_attr->cap.max_recv_wr = rq_size -1;
nes_debug(NES_DBG_QP, "RQ size=%u, SQ Size=%u\n", rq_size, sq_size);
ret = nes_alloc_resource(nesadapter, nesadapter->allocated_qps,
nesadapter->max_qp, &qp_num, &nesadapter->next_qp);
if (ret) {
return ERR_PTR(ret);
}
/* Need 512 (actually now 1024) byte alignment on this structure */
mem = kzalloc(sizeof(*nesqp)+NES_SW_CONTEXT_ALIGN-1, GFP_KERNEL);
if (!mem) {
nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
nes_debug(NES_DBG_QP, "Unable to allocate QP\n");
return ERR_PTR(-ENOMEM);
}
u64nesqp = (unsigned long)mem;
u64nesqp += ((u64)NES_SW_CONTEXT_ALIGN) - 1;
u64temp = ((u64)NES_SW_CONTEXT_ALIGN) - 1;
u64nesqp &= ~u64temp;
nesqp = (struct nes_qp *)(unsigned long)u64nesqp;
/* nes_debug(NES_DBG_QP, "nesqp=%p, allocated buffer=%p. Rounded to closest %u\n",
nesqp, mem, NES_SW_CONTEXT_ALIGN); */
nesqp->allocated_buffer = mem;
if (udata) {
if (ib_copy_from_udata(&req, udata, sizeof(struct nes_create_qp_req))) {
nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
kfree(nesqp->allocated_buffer);
nes_debug(NES_DBG_QP, "ib_copy_from_udata() Failed \n");
return NULL;
}
if (req.user_wqe_buffers) {
virt_wqs = 1;
}
if ((ibpd->uobject) && (ibpd->uobject->context)) {
nesqp->user_mode = 1;
nes_ucontext = to_nesucontext(ibpd->uobject->context);
if (virt_wqs) {
err = 1;
list_for_each_entry(nespbl, &nes_ucontext->qp_reg_mem_list, list) {
if (nespbl->user_base == (unsigned long )req.user_wqe_buffers) {
list_del(&nespbl->list);
err = 0;
nes_debug(NES_DBG_QP, "Found PBL for virtual QP. nespbl=%p. user_base=0x%lx\n",
nespbl, nespbl->user_base);
break;
}
}
if (err) {
nes_debug(NES_DBG_QP, "Didn't Find PBL for virtual QP. address = %llx.\n",
(long long unsigned int)req.user_wqe_buffers);
nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
kfree(nesqp->allocated_buffer);
return ERR_PTR(-EFAULT);
}
}
nes_ucontext = to_nesucontext(ibpd->uobject->context);
nesqp->mmap_sq_db_index =
find_next_zero_bit(nes_ucontext->allocated_wqs,
NES_MAX_USER_WQ_REGIONS, nes_ucontext->first_free_wq);
/* nes_debug(NES_DBG_QP, "find_first_zero_biton wqs returned %u\n",
nespd->mmap_db_index); */
if (nesqp->mmap_sq_db_index >= NES_MAX_USER_WQ_REGIONS) {
nes_debug(NES_DBG_QP,
"db index > max user regions, failing create QP\n");
nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
if (virt_wqs) {
pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
nespbl->pbl_pbase);
kfree(nespbl);
}
kfree(nesqp->allocated_buffer);
return ERR_PTR(-ENOMEM);
}
set_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = nesqp;
nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index + 1;
} else {
nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
kfree(nesqp->allocated_buffer);
return ERR_PTR(-EFAULT);
}
}
err = (!virt_wqs) ? nes_setup_mmap_qp(nesqp, nesvnic, sq_size, rq_size) :
nes_setup_virt_qp(nesqp, nespbl, nesvnic, sq_size, rq_size);
if (err) {
nes_debug(NES_DBG_QP,
"error geting qp mem code = %d\n", err);
nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
kfree(nesqp->allocated_buffer);
return ERR_PTR(-ENOMEM);
}
nesqp->hwqp.sq_size = sq_size;
nesqp->hwqp.sq_encoded_size = sq_encoded_size;
nesqp->hwqp.sq_head = 1;
nesqp->hwqp.rq_size = rq_size;
nesqp->hwqp.rq_encoded_size = rq_encoded_size;
/* nes_debug(NES_DBG_QP, "nesqp->nesqp_context_pbase = %p\n",
(void *)nesqp->nesqp_context_pbase);
*/
nesqp->hwqp.qp_id = qp_num;
nesqp->ibqp.qp_num = nesqp->hwqp.qp_id;
nesqp->nespd = nespd;
nescq = to_nescq(init_attr->send_cq);
nesqp->nesscq = nescq;
nescq = to_nescq(init_attr->recv_cq);
nesqp->nesrcq = nescq;
nesqp->nesqp_context->misc |= cpu_to_le32((u32)PCI_FUNC(nesdev->pcidev->devfn) <<
NES_QPCONTEXT_MISC_PCI_FCN_SHIFT);
nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.rq_encoded_size <<
NES_QPCONTEXT_MISC_RQ_SIZE_SHIFT);
nesqp->nesqp_context->misc |= cpu_to_le32((u32)nesqp->hwqp.sq_encoded_size <<
NES_QPCONTEXT_MISC_SQ_SIZE_SHIFT);
nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_PRIV_EN);
nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_FAST_REGISTER_EN);
nesqp->nesqp_context->cqs = cpu_to_le32(nesqp->nesscq->hw_cq.cq_number +
((u32)nesqp->nesrcq->hw_cq.cq_number << 16));
u64temp = (u64)nesqp->hwqp.sq_pbase;
nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
if (!virt_wqs) {
u64temp = (u64)nesqp->hwqp.sq_pbase;
nesqp->nesqp_context->sq_addr_low = cpu_to_le32((u32)u64temp);
nesqp->nesqp_context->sq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
u64temp = (u64)nesqp->hwqp.rq_pbase;
nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
} else {
u64temp = (u64)nesqp->pbl_pbase;
nesqp->nesqp_context->rq_addr_low = cpu_to_le32((u32)u64temp);
nesqp->nesqp_context->rq_addr_high = cpu_to_le32((u32)(u64temp >> 32));
}
/* nes_debug(NES_DBG_QP, "next_qp_nic_index=%u, using nic_index=%d\n",
nesvnic->next_qp_nic_index,
nesvnic->qp_nic_index[nesvnic->next_qp_nic_index]); */
spin_lock_irqsave(&nesdev->cqp.lock, flags);
nesqp->nesqp_context->misc2 |= cpu_to_le32(
(u32)nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] <<
NES_QPCONTEXT_MISC2_NIC_INDEX_SHIFT);
nesvnic->next_qp_nic_index++;
if ((nesvnic->next_qp_nic_index > 3) ||
(nesvnic->qp_nic_index[nesvnic->next_qp_nic_index] == 0xf)) {
nesvnic->next_qp_nic_index = 0;
}
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
nesqp->nesqp_context->pd_index_wscale |= cpu_to_le32((u32)nesqp->nespd->pd_id << 16);
u64temp = (u64)nesqp->hwqp.q2_pbase;
nesqp->nesqp_context->q2_addr_low = cpu_to_le32((u32)u64temp);
nesqp->nesqp_context->q2_addr_high = cpu_to_le32((u32)(u64temp >> 32));
nesqp->nesqp_context->aeq_token_low = cpu_to_le32((u32)((unsigned long)(nesqp)));
nesqp->nesqp_context->aeq_token_high = cpu_to_le32((u32)(upper_32_bits((unsigned long)(nesqp))));
nesqp->nesqp_context->ird_ord_sizes = cpu_to_le32(NES_QPCONTEXT_ORDIRD_ALSMM |
((((u32)nesadapter->max_irrq_wr) <<
NES_QPCONTEXT_ORDIRD_IRDSIZE_SHIFT) & NES_QPCONTEXT_ORDIRD_IRDSIZE_MASK));
if (disable_mpa_crc) {
nes_debug(NES_DBG_QP, "Disabling MPA crc checking due to module option.\n");
nesqp->nesqp_context->ird_ord_sizes |= cpu_to_le32(NES_QPCONTEXT_ORDIRD_RNMC);
}
/* Create the QP */
cqp_request = nes_get_cqp_request(nesdev);
if (cqp_request == NULL) {
nes_debug(NES_DBG_QP, "Failed to get a cqp_request\n");
nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
nes_free_qp_mem(nesdev, nesqp,virt_wqs);
kfree(nesqp->allocated_buffer);
return ERR_PTR(-ENOMEM);
}
cqp_request->waiting = 1;
cqp_wqe = &cqp_request->cqp_wqe;
if (!virt_wqs) {
opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP |
NES_CQP_QP_IWARP_STATE_IDLE;
} else {
opcode = NES_CQP_CREATE_QP | NES_CQP_QP_TYPE_IWARP | NES_CQP_QP_VIRT_WQS |
NES_CQP_QP_IWARP_STATE_IDLE;
}
opcode |= NES_CQP_QP_CQS_VALID;
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
u64temp = (u64)nesqp->nesqp_context_pbase;
set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, u64temp);
atomic_set(&cqp_request->refcount, 2);
nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
/* Wait for CQP */
nes_debug(NES_DBG_QP, "Waiting for create iWARP QP%u to complete.\n",
nesqp->hwqp.qp_id);
ret = wait_event_timeout(cqp_request->waitq,
(cqp_request->request_done != 0), NES_EVENT_TIMEOUT);
nes_debug(NES_DBG_QP, "Create iwarp QP%u completed, wait_event_timeout ret=%u,"
" nesdev->cqp_head = %u, nesdev->cqp.sq_tail = %u,"
" CQP Major:Minor codes = 0x%04X:0x%04X.\n",
nesqp->hwqp.qp_id, ret, nesdev->cqp.sq_head, nesdev->cqp.sq_tail,
cqp_request->major_code, cqp_request->minor_code);
if ((!ret) || (cqp_request->major_code)) {
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
nes_free_qp_mem(nesdev, nesqp,virt_wqs);
kfree(nesqp->allocated_buffer);
if (!ret) {
return ERR_PTR(-ETIME);
} else {
return ERR_PTR(-EIO);
}
} else {
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
}
if (ibpd->uobject) {
uresp.mmap_sq_db_index = nesqp->mmap_sq_db_index;
uresp.actual_sq_size = sq_size;
uresp.actual_rq_size = rq_size;
uresp.qp_id = nesqp->hwqp.qp_id;
uresp.nes_drv_opt = nes_drv_opt;
if (ib_copy_to_udata(udata, &uresp, sizeof uresp)) {
nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
nes_free_qp_mem(nesdev, nesqp,virt_wqs);
kfree(nesqp->allocated_buffer);
return ERR_PTR(-EFAULT);
}
}
nes_debug(NES_DBG_QP, "QP%u structure located @%p.Size = %u.\n",
nesqp->hwqp.qp_id, nesqp, (u32)sizeof(*nesqp));
spin_lock_init(&nesqp->lock);
init_waitqueue_head(&nesqp->state_waitq);
init_waitqueue_head(&nesqp->kick_waitq);
nes_add_ref(&nesqp->ibqp);
break;
default:
nes_debug(NES_DBG_QP, "Invalid QP type: %d\n", init_attr->qp_type);
return ERR_PTR(-EINVAL);
break;
}
/* update the QP table */
nesdev->nesadapter->qp_table[nesqp->hwqp.qp_id-NES_FIRST_QPN] = nesqp;
nes_debug(NES_DBG_QP, "netdev refcnt=%u\n",
atomic_read(&nesvnic->netdev->refcnt));
return &nesqp->ibqp;
}
/**
* nes_destroy_qp
*/
static int nes_destroy_qp(struct ib_qp *ibqp)
{
struct nes_qp *nesqp = to_nesqp(ibqp);
/* struct nes_vnic *nesvnic = to_nesvnic(ibqp->device); */
struct nes_ucontext *nes_ucontext;
struct ib_qp_attr attr;
struct iw_cm_id *cm_id;
struct iw_cm_event cm_event;
int ret;
atomic_inc(&sw_qps_destroyed);
nesqp->destroyed = 1;
/* Blow away the connection if it exists. */
if (nesqp->ibqp_state >= IB_QPS_INIT && nesqp->ibqp_state <= IB_QPS_RTS) {
/* if (nesqp->ibqp_state == IB_QPS_RTS) { */
attr.qp_state = IB_QPS_ERR;
nes_modify_qp(&nesqp->ibqp, &attr, IB_QP_STATE, NULL);
}
if (((nesqp->ibqp_state == IB_QPS_INIT) ||
(nesqp->ibqp_state == IB_QPS_RTR)) && (nesqp->cm_id)) {
cm_id = nesqp->cm_id;
cm_event.event = IW_CM_EVENT_CONNECT_REPLY;
cm_event.status = IW_CM_EVENT_STATUS_TIMEOUT;
cm_event.local_addr = cm_id->local_addr;
cm_event.remote_addr = cm_id->remote_addr;
cm_event.private_data = NULL;
cm_event.private_data_len = 0;
nes_debug(NES_DBG_QP, "Generating a CM Timeout Event for "
"QP%u. cm_id = %p, refcount = %u. \n",
nesqp->hwqp.qp_id, cm_id, atomic_read(&nesqp->refcount));
cm_id->rem_ref(cm_id);
ret = cm_id->event_handler(cm_id, &cm_event);
if (ret)
nes_debug(NES_DBG_QP, "OFA CM event_handler returned, ret=%d\n", ret);
}
if (nesqp->user_mode) {
if ((ibqp->uobject)&&(ibqp->uobject->context)) {
nes_ucontext = to_nesucontext(ibqp->uobject->context);
clear_bit(nesqp->mmap_sq_db_index, nes_ucontext->allocated_wqs);
nes_ucontext->mmap_nesqp[nesqp->mmap_sq_db_index] = NULL;
if (nes_ucontext->first_free_wq > nesqp->mmap_sq_db_index) {
nes_ucontext->first_free_wq = nesqp->mmap_sq_db_index;
}
}
if (nesqp->pbl_pbase)
kunmap(nesqp->page);
}
nes_rem_ref(&nesqp->ibqp);
return 0;
}
/**
* nes_create_cq
*/
static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
int comp_vector,
struct ib_ucontext *context, struct ib_udata *udata)
{
u64 u64temp;
struct nes_vnic *nesvnic = to_nesvnic(ibdev);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
struct nes_cq *nescq;
struct nes_ucontext *nes_ucontext = NULL;
struct nes_cqp_request *cqp_request;
void *mem = NULL;
struct nes_hw_cqp_wqe *cqp_wqe;
struct nes_pbl *nespbl = NULL;
struct nes_create_cq_req req;
struct nes_create_cq_resp resp;
u32 cq_num = 0;
u32 opcode = 0;
u32 pbl_entries = 1;
int err;
unsigned long flags;
int ret;
err = nes_alloc_resource(nesadapter, nesadapter->allocated_cqs,
nesadapter->max_cq, &cq_num, &nesadapter->next_cq);
if (err) {
return ERR_PTR(err);
}
nescq = kzalloc(sizeof(struct nes_cq), GFP_KERNEL);
if (!nescq) {
nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
nes_debug(NES_DBG_CQ, "Unable to allocate nes_cq struct\n");
return ERR_PTR(-ENOMEM);
}
nescq->hw_cq.cq_size = max(entries + 1, 5);
nescq->hw_cq.cq_number = cq_num;
nescq->ibcq.cqe = nescq->hw_cq.cq_size - 1;
if (context) {
nes_ucontext = to_nesucontext(context);
if (ib_copy_from_udata(&req, udata, sizeof (struct nes_create_cq_req))) {
nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
kfree(nescq);
return ERR_PTR(-EFAULT);
}
nesvnic->mcrq_ucontext = nes_ucontext;
nes_ucontext->mcrqf = req.mcrqf;
if (nes_ucontext->mcrqf) {
if (nes_ucontext->mcrqf & 0x80000000)
nescq->hw_cq.cq_number = nesvnic->nic.qp_id + 12 + (nes_ucontext->mcrqf & 0xf) - 1;
else if (nes_ucontext->mcrqf & 0x40000000)
nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
else
nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
}
nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
(unsigned long)req.user_cq_buffer, entries);
err = 1;
list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
list_del(&nespbl->list);
err = 0;
nes_debug(NES_DBG_CQ, "Found PBL for virtual CQ. nespbl=%p.\n",
nespbl);
break;
}
}
if (err) {
nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
kfree(nescq);
return ERR_PTR(-EFAULT);
}
pbl_entries = nespbl->pbl_size >> 3;
nescq->cq_mem_size = 0;
} else {
nescq->cq_mem_size = nescq->hw_cq.cq_size * sizeof(struct nes_hw_cqe);
nes_debug(NES_DBG_CQ, "Attempting to allocate pci memory (%u entries, %u bytes) for CQ%u.\n",
entries, nescq->cq_mem_size, nescq->hw_cq.cq_number);
/* allocate the physical buffer space */
mem = pci_alloc_consistent(nesdev->pcidev, nescq->cq_mem_size,
&nescq->hw_cq.cq_pbase);
if (!mem) {
printk(KERN_ERR PFX "Unable to allocate pci memory for cq\n");
nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
kfree(nescq);
return ERR_PTR(-ENOMEM);
}
memset(mem, 0, nescq->cq_mem_size);
nescq->hw_cq.cq_vbase = mem;
nescq->hw_cq.cq_head = 0;
nes_debug(NES_DBG_CQ, "CQ%u virtual address @ %p, phys = 0x%08X\n",
nescq->hw_cq.cq_number, nescq->hw_cq.cq_vbase,
(u32)nescq->hw_cq.cq_pbase);
}
nescq->hw_cq.ce_handler = nes_iwarp_ce_handler;
spin_lock_init(&nescq->lock);
/* send CreateCQ request to CQP */
cqp_request = nes_get_cqp_request(nesdev);
if (cqp_request == NULL) {
nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
if (!context)
pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
nescq->hw_cq.cq_pbase);
nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
kfree(nescq);
return ERR_PTR(-ENOMEM);
}
cqp_request->waiting = 1;
cqp_wqe = &cqp_request->cqp_wqe;
opcode = NES_CQP_CREATE_CQ | NES_CQP_CQ_CEQ_VALID |
NES_CQP_CQ_CHK_OVERFLOW |
NES_CQP_CQ_CEQE_MASK | ((u32)nescq->hw_cq.cq_size << 16);
spin_lock_irqsave(&nesadapter->pbl_lock, flags);
if (pbl_entries != 1) {
if (pbl_entries > 32) {
/* use 4k pbl */
nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 4k PBL\n", pbl_entries);
if (nesadapter->free_4kpbl == 0) {
if (cqp_request->dynamic) {
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
kfree(cqp_request);
} else {
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
}
if (!context)
pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
nescq->hw_cq.cq_pbase);
nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
kfree(nescq);
return ERR_PTR(-ENOMEM);
} else {
opcode |= (NES_CQP_CQ_VIRT | NES_CQP_CQ_4KB_CHUNK);
nescq->virtual_cq = 2;
nesadapter->free_4kpbl--;
}
} else {
/* use 256 byte pbl */
nes_debug(NES_DBG_CQ, "pbl_entries=%u, use a 256 byte PBL\n", pbl_entries);
if (nesadapter->free_256pbl == 0) {
if (cqp_request->dynamic) {
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
kfree(cqp_request);
} else {
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
}
if (!context)
pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
nescq->hw_cq.cq_pbase);
nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
kfree(nescq);
return ERR_PTR(-ENOMEM);
} else {
opcode |= NES_CQP_CQ_VIRT;
nescq->virtual_cq = 1;
nesadapter->free_256pbl--;
}
}
}
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
(nescq->hw_cq.cq_number | ((u32)nesdev->ceq_index << 16)));
if (context) {
if (pbl_entries != 1)
u64temp = (u64)nespbl->pbl_pbase;
else
u64temp = le64_to_cpu(nespbl->pbl_vbase[0]);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX,
nes_ucontext->mmap_db_index[0]);
} else {
u64temp = (u64)nescq->hw_cq.cq_pbase;
cqp_wqe->wqe_words[NES_CQP_CQ_WQE_DOORBELL_INDEX_HIGH_IDX] = 0;
}
set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_CQ_WQE_PBL_LOW_IDX, u64temp);
cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] = 0;
u64temp = (u64)(unsigned long)&nescq->hw_cq;
cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_LOW_IDX] =
cpu_to_le32((u32)(u64temp >> 1));
cqp_wqe->wqe_words[NES_CQP_CQ_WQE_CQ_CONTEXT_HIGH_IDX] =
cpu_to_le32(((u32)((u64temp) >> 33)) & 0x7FFFFFFF);
atomic_set(&cqp_request->refcount, 2);
nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
/* Wait for CQP */
nes_debug(NES_DBG_CQ, "Waiting for create iWARP CQ%u to complete.\n",
nescq->hw_cq.cq_number);
ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
NES_EVENT_TIMEOUT * 2);
nes_debug(NES_DBG_CQ, "Create iWARP CQ%u completed, wait_event_timeout ret = %d.\n",
nescq->hw_cq.cq_number, ret);
if ((!ret) || (cqp_request->major_code)) {
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
nes_debug(NES_DBG_CQ, "iWARP CQ%u create timeout expired, major code = 0x%04X,"
" minor code = 0x%04X\n",
nescq->hw_cq.cq_number, cqp_request->major_code, cqp_request->minor_code);
if (!context)
pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
nescq->hw_cq.cq_pbase);
nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
kfree(nescq);
return ERR_PTR(-EIO);
} else {
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
}
if (context) {
/* free the nespbl */
pci_free_consistent(nesdev->pcidev, nespbl->pbl_size, nespbl->pbl_vbase,
nespbl->pbl_pbase);
kfree(nespbl);
resp.cq_id = nescq->hw_cq.cq_number;
resp.cq_size = nescq->hw_cq.cq_size;
resp.mmap_db_index = 0;
if (ib_copy_to_udata(udata, &resp, sizeof resp)) {
nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
kfree(nescq);
return ERR_PTR(-EFAULT);
}
}
return &nescq->ibcq;
}
/**
* nes_destroy_cq
*/
static int nes_destroy_cq(struct ib_cq *ib_cq)
{
struct nes_cq *nescq;
struct nes_device *nesdev;
struct nes_vnic *nesvnic;
struct nes_adapter *nesadapter;
struct nes_hw_cqp_wqe *cqp_wqe;
struct nes_cqp_request *cqp_request;
unsigned long flags;
u32 opcode = 0;
int ret;
if (ib_cq == NULL)
return 0;
nescq = to_nescq(ib_cq);
nesvnic = to_nesvnic(ib_cq->device);
nesdev = nesvnic->nesdev;
nesadapter = nesdev->nesadapter;
nes_debug(NES_DBG_CQ, "Destroy CQ%u\n", nescq->hw_cq.cq_number);
/* Send DestroyCQ request to CQP */
cqp_request = nes_get_cqp_request(nesdev);
if (cqp_request == NULL) {
nes_debug(NES_DBG_CQ, "Failed to get a cqp_request.\n");
return -ENOMEM;
}
cqp_request->waiting = 1;
cqp_wqe = &cqp_request->cqp_wqe;
opcode = NES_CQP_DESTROY_CQ | (nescq->hw_cq.cq_size << 16);
spin_lock_irqsave(&nesadapter->pbl_lock, flags);
if (nescq->virtual_cq == 1) {
nesadapter->free_256pbl++;
if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
printk(KERN_ERR PFX "%s: free 256B PBLs(%u) has exceeded the max(%u)\n",
__FUNCTION__, nesadapter->free_256pbl, nesadapter->max_256pbl);
}
} else if (nescq->virtual_cq == 2) {
nesadapter->free_4kpbl++;
if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
printk(KERN_ERR PFX "%s: free 4K PBLs(%u) has exceeded the max(%u)\n",
__FUNCTION__, nesadapter->free_4kpbl, nesadapter->max_4kpbl);
}
opcode |= NES_CQP_CQ_4KB_CHUNK;
}
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
(nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
atomic_set(&cqp_request->refcount, 2);
nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
/* Wait for CQP */
nes_debug(NES_DBG_CQ, "Waiting for destroy iWARP CQ%u to complete.\n",
nescq->hw_cq.cq_number);
ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
NES_EVENT_TIMEOUT);
nes_debug(NES_DBG_CQ, "Destroy iWARP CQ%u completed, wait_event_timeout ret = %u,"
" CQP Major:Minor codes = 0x%04X:0x%04X.\n",
nescq->hw_cq.cq_number, ret, cqp_request->major_code,
cqp_request->minor_code);
if ((!ret) || (cqp_request->major_code)) {
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
if (!ret) {
nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy timeout expired\n",
nescq->hw_cq.cq_number);
ret = -ETIME;
} else {
nes_debug(NES_DBG_CQ, "iWARP CQ%u destroy failed\n",
nescq->hw_cq.cq_number);
ret = -EIO;
}
} else {
ret = 0;
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
}
if (nescq->cq_mem_size)
pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size,
(void *)nescq->hw_cq.cq_vbase, nescq->hw_cq.cq_pbase);
kfree(nescq);
return ret;
}
/**
* nes_reg_mr
*/
static int nes_reg_mr(struct nes_device *nesdev, struct nes_pd *nespd,
u32 stag, u64 region_length, struct nes_root_vpbl *root_vpbl,
dma_addr_t single_buffer, u16 pbl_count, u16 residual_page_count,
int acc, u64 *iova_start)
{
struct nes_hw_cqp_wqe *cqp_wqe;
struct nes_cqp_request *cqp_request;
unsigned long flags;
int ret;
struct nes_adapter *nesadapter = nesdev->nesadapter;
/* int count; */
u32 opcode = 0;
u16 major_code;
/* Register the region with the adapter */
cqp_request = nes_get_cqp_request(nesdev);
if (cqp_request == NULL) {
nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
return -ENOMEM;
}
cqp_request->waiting = 1;
cqp_wqe = &cqp_request->cqp_wqe;
spin_lock_irqsave(&nesadapter->pbl_lock, flags);
/* track PBL resources */
if (pbl_count != 0) {
if (pbl_count > 1) {
/* Two level PBL */
if ((pbl_count+1) > nesadapter->free_4kpbl) {
nes_debug(NES_DBG_MR, "Out of 4KB Pbls for two level request.\n");
if (cqp_request->dynamic) {
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
kfree(cqp_request);
} else {
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
}
return -ENOMEM;
} else {
nesadapter->free_4kpbl -= pbl_count+1;
}
} else if (residual_page_count > 32) {
if (pbl_count > nesadapter->free_4kpbl) {
nes_debug(NES_DBG_MR, "Out of 4KB Pbls.\n");
if (cqp_request->dynamic) {
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
kfree(cqp_request);
} else {
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
}
return -ENOMEM;
} else {
nesadapter->free_4kpbl -= pbl_count;
}
} else {
if (pbl_count > nesadapter->free_256pbl) {
nes_debug(NES_DBG_MR, "Out of 256B Pbls.\n");
if (cqp_request->dynamic) {
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
kfree(cqp_request);
} else {
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
}
return -ENOMEM;
} else {
nesadapter->free_256pbl -= pbl_count;
}
}
}
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
opcode = NES_CQP_REGISTER_STAG | NES_CQP_STAG_RIGHTS_LOCAL_READ |
NES_CQP_STAG_VA_TO | NES_CQP_STAG_MR;
if (acc & IB_ACCESS_LOCAL_WRITE)
opcode |= NES_CQP_STAG_RIGHTS_LOCAL_WRITE;
if (acc & IB_ACCESS_REMOTE_WRITE)
opcode |= NES_CQP_STAG_RIGHTS_REMOTE_WRITE | NES_CQP_STAG_REM_ACC_EN;
if (acc & IB_ACCESS_REMOTE_READ)
opcode |= NES_CQP_STAG_RIGHTS_REMOTE_READ | NES_CQP_STAG_REM_ACC_EN;
if (acc & IB_ACCESS_MW_BIND)
opcode |= NES_CQP_STAG_RIGHTS_WINDOW_BIND | NES_CQP_STAG_REM_ACC_EN;
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_VA_LOW_IDX, *iova_start);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_LEN_LOW_IDX, region_length);
cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] =
cpu_to_le32((u32)(region_length >> 8) & 0xff000000);
cqp_wqe->wqe_words[NES_CQP_STAG_WQE_LEN_HIGH_PD_IDX] |=
cpu_to_le32(nespd->pd_id & 0x00007fff);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, stag);
if (pbl_count == 0) {
set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, single_buffer);
} else {
set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PA_LOW_IDX, root_vpbl->pbl_pbase);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_BLK_COUNT_IDX, pbl_count);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_PBL_LEN_IDX,
(((pbl_count - 1) * 4096) + (residual_page_count*8)));
if ((pbl_count > 1) || (residual_page_count > 32))
cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX] |= cpu_to_le32(NES_CQP_STAG_PBL_BLK_SIZE);
}
barrier();
atomic_set(&cqp_request->refcount, 2);
nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
/* Wait for CQP */
ret = wait_event_timeout(cqp_request->waitq, (0 != cqp_request->request_done),
NES_EVENT_TIMEOUT);
nes_debug(NES_DBG_MR, "Register STag 0x%08X completed, wait_event_timeout ret = %u,"
" CQP Major:Minor codes = 0x%04X:0x%04X.\n",
stag, ret, cqp_request->major_code, cqp_request->minor_code);
major_code = cqp_request->major_code;
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
if (!ret)
return -ETIME;
else if (major_code)
return -EIO;
else
return 0;
return 0;
}
/**
* nes_reg_phys_mr
*/
static struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd,
struct ib_phys_buf *buffer_list, int num_phys_buf, int acc,
u64 * iova_start)
{
u64 region_length;
struct nes_pd *nespd = to_nespd(ib_pd);
struct nes_vnic *nesvnic = to_nesvnic(ib_pd->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
struct nes_mr *nesmr;
struct ib_mr *ibmr;
struct nes_vpbl vpbl;
struct nes_root_vpbl root_vpbl;
u32 stag;
u32 i;
u32 stag_index = 0;
u32 next_stag_index = 0;
u32 driver_key = 0;
u32 root_pbl_index = 0;
u32 cur_pbl_index = 0;
int err = 0, pbl_depth = 0;
int ret = 0;
u16 pbl_count = 0;
u8 single_page = 1;
u8 stag_key = 0;
pbl_depth = 0;
region_length = 0;
vpbl.pbl_vbase = NULL;
root_vpbl.pbl_vbase = NULL;
root_vpbl.pbl_pbase = 0;
get_random_bytes(&next_stag_index, sizeof(next_stag_index));
stag_key = (u8)next_stag_index;
driver_key = 0;
next_stag_index >>= 8;
next_stag_index %= nesadapter->max_mr;
if (num_phys_buf > (1024*512)) {
return ERR_PTR(-E2BIG);
}
err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs, nesadapter->max_mr,
&stag_index, &next_stag_index);
if (err) {
return ERR_PTR(err);
}
nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
if (!nesmr) {
nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
return ERR_PTR(-ENOMEM);
}
for (i = 0; i < num_phys_buf; i++) {
if ((i & 0x01FF) == 0) {
if (root_pbl_index == 1) {
/* Allocate the root PBL */
root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 8192,
&root_vpbl.pbl_pbase);
nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
if (!root_vpbl.pbl_vbase) {
pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
vpbl.pbl_pbase);
nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
kfree(nesmr);
return ERR_PTR(-ENOMEM);
}
root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024, GFP_KERNEL);
if (!root_vpbl.leaf_vpbl) {
pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
root_vpbl.pbl_pbase);
pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
vpbl.pbl_pbase);
nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
kfree(nesmr);
return ERR_PTR(-ENOMEM);
}
root_vpbl.pbl_vbase[0].pa_low = cpu_to_le32((u32)vpbl.pbl_pbase);
root_vpbl.pbl_vbase[0].pa_high =
cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
root_vpbl.leaf_vpbl[0] = vpbl;
}
/* Allocate a 4K buffer for the PBL */
vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
&vpbl.pbl_pbase);
nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%016lX\n",
vpbl.pbl_vbase, (unsigned long)vpbl.pbl_pbase);
if (!vpbl.pbl_vbase) {
nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
ibmr = ERR_PTR(-ENOMEM);
kfree(nesmr);
goto reg_phys_err;
}
/* Fill in the root table */
if (1 <= root_pbl_index) {
root_vpbl.pbl_vbase[root_pbl_index].pa_low =
cpu_to_le32((u32)vpbl.pbl_pbase);
root_vpbl.pbl_vbase[root_pbl_index].pa_high =
cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
}
root_pbl_index++;
cur_pbl_index = 0;
}
if (buffer_list[i].addr & ~PAGE_MASK) {
/* TODO: Unwind allocated buffers */
nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
(unsigned int) buffer_list[i].addr);
ibmr = ERR_PTR(-EINVAL);
kfree(nesmr);
goto reg_phys_err;
}
if (!buffer_list[i].size) {
nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
ibmr = ERR_PTR(-EINVAL);
kfree(nesmr);
goto reg_phys_err;
}
region_length += buffer_list[i].size;
if ((i != 0) && (single_page)) {
if ((buffer_list[i-1].addr+PAGE_SIZE) != buffer_list[i].addr)
single_page = 0;
}
vpbl.pbl_vbase[cur_pbl_index].pa_low = cpu_to_le32((u32)buffer_list[i].addr);
vpbl.pbl_vbase[cur_pbl_index++].pa_high =
cpu_to_le32((u32)((((u64)buffer_list[i].addr) >> 32)));
}
stag = stag_index << 8;
stag |= driver_key;
stag += (u32)stag_key;
nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%016lX,"
" length = 0x%016lX, index = 0x%08X\n",
stag, (unsigned long)*iova_start, (unsigned long)region_length, stag_index);
region_length -= (*iova_start)&PAGE_MASK;
/* Make the leaf PBL the root if only one PBL */
if (root_pbl_index == 1) {
root_vpbl.pbl_pbase = vpbl.pbl_pbase;
}
if (single_page) {
pbl_count = 0;
} else {
pbl_count = root_pbl_index;
}
ret = nes_reg_mr(nesdev, nespd, stag, region_length, &root_vpbl,
buffer_list[0].addr, pbl_count, (u16)cur_pbl_index, acc, iova_start);
if (ret == 0) {
nesmr->ibmr.rkey = stag;
nesmr->ibmr.lkey = stag;
nesmr->mode = IWNES_MEMREG_TYPE_MEM;
ibmr = &nesmr->ibmr;
nesmr->pbl_4k = ((pbl_count > 1) || (cur_pbl_index > 32)) ? 1 : 0;
nesmr->pbls_used = pbl_count;
if (pbl_count > 1) {
nesmr->pbls_used++;
}
} else {
kfree(nesmr);
ibmr = ERR_PTR(-ENOMEM);
}
reg_phys_err:
/* free the resources */
if (root_pbl_index == 1) {
/* single PBL case */
pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase, vpbl.pbl_pbase);
} else {
for (i=0; i<root_pbl_index; i++) {
pci_free_consistent(nesdev->pcidev, 4096, root_vpbl.leaf_vpbl[i].pbl_vbase,
root_vpbl.leaf_vpbl[i].pbl_pbase);
}
kfree(root_vpbl.leaf_vpbl);
pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
root_vpbl.pbl_pbase);
}
return ibmr;
}
/**
* nes_get_dma_mr
*/
static struct ib_mr *nes_get_dma_mr(struct ib_pd *pd, int acc)
{
struct ib_phys_buf bl;
u64 kva = 0;
nes_debug(NES_DBG_MR, "\n");
bl.size = (u64)0xffffffffffULL;
bl.addr = 0;
return nes_reg_phys_mr(pd, &bl, 1, acc, &kva);
}
/**
* nes_reg_user_mr
*/
static struct ib_mr *nes_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
u64 virt, int acc, struct ib_udata *udata)
{
u64 iova_start;
__le64 *pbl;
u64 region_length;
dma_addr_t last_dma_addr = 0;
dma_addr_t first_dma_addr = 0;
struct nes_pd *nespd = to_nespd(pd);
struct nes_vnic *nesvnic = to_nesvnic(pd->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
struct ib_mr *ibmr = ERR_PTR(-EINVAL);
struct ib_umem_chunk *chunk;
struct nes_ucontext *nes_ucontext;
struct nes_pbl *nespbl;
struct nes_mr *nesmr;
struct ib_umem *region;
struct nes_mem_reg_req req;
struct nes_vpbl vpbl;
struct nes_root_vpbl root_vpbl;
int nmap_index, page_index;
int page_count = 0;
int err, pbl_depth = 0;
int chunk_pages;
int ret;
u32 stag;
u32 stag_index = 0;
u32 next_stag_index;
u32 driver_key;
u32 root_pbl_index = 0;
u32 cur_pbl_index = 0;
u32 skip_pages;
u16 pbl_count;
u8 single_page = 1;
u8 stag_key;
region = ib_umem_get(pd->uobject->context, start, length, acc);
if (IS_ERR(region)) {
return (struct ib_mr *)region;
}
nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
" offset = %u, page size = %u.\n",
(unsigned long int)start, (unsigned long int)virt, (u32)length,
region->offset, region->page_size);
skip_pages = ((u32)region->offset) >> 12;
if (ib_copy_from_udata(&req, udata, sizeof(req)))
return ERR_PTR(-EFAULT);
nes_debug(NES_DBG_MR, "Memory Registration type = %08X.\n", req.reg_type);
switch (req.reg_type) {
case IWNES_MEMREG_TYPE_MEM:
pbl_depth = 0;
region_length = 0;
vpbl.pbl_vbase = NULL;
root_vpbl.pbl_vbase = NULL;
root_vpbl.pbl_pbase = 0;
get_random_bytes(&next_stag_index, sizeof(next_stag_index));
stag_key = (u8)next_stag_index;
driver_key = next_stag_index & 0x70000000;
next_stag_index >>= 8;
next_stag_index %= nesadapter->max_mr;
err = nes_alloc_resource(nesadapter, nesadapter->allocated_mrs,
nesadapter->max_mr, &stag_index, &next_stag_index);
if (err) {
ib_umem_release(region);
return ERR_PTR(err);
}
nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
if (!nesmr) {
ib_umem_release(region);
nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
return ERR_PTR(-ENOMEM);
}
nesmr->region = region;
list_for_each_entry(chunk, &region->chunk_list, list) {
nes_debug(NES_DBG_MR, "Chunk: nents = %u, nmap = %u .\n",
chunk->nents, chunk->nmap);
for (nmap_index = 0; nmap_index < chunk->nmap; ++nmap_index) {
if (sg_dma_address(&chunk->page_list[nmap_index]) & ~PAGE_MASK) {
ib_umem_release(region);
nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
nes_debug(NES_DBG_MR, "Unaligned Memory Buffer: 0x%x\n",
(unsigned int) sg_dma_address(&chunk->page_list[nmap_index]));
ibmr = ERR_PTR(-EINVAL);
kfree(nesmr);
goto reg_user_mr_err;
}
if (!sg_dma_len(&chunk->page_list[nmap_index])) {
ib_umem_release(region);
nes_free_resource(nesadapter, nesadapter->allocated_mrs,
stag_index);
nes_debug(NES_DBG_MR, "Invalid Buffer Size\n");
ibmr = ERR_PTR(-EINVAL);
kfree(nesmr);
goto reg_user_mr_err;
}
region_length += sg_dma_len(&chunk->page_list[nmap_index]);
chunk_pages = sg_dma_len(&chunk->page_list[nmap_index]) >> 12;
region_length -= skip_pages << 12;
for (page_index=skip_pages; page_index < chunk_pages; page_index++) {
skip_pages = 0;
if ((page_count!=0)&&(page_count<<12)-(region->offset&(4096-1))>=region->length)
goto enough_pages;
if ((page_count&0x01FF) == 0) {
if (page_count>(1024*512)) {
ib_umem_release(region);
pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
vpbl.pbl_pbase);
nes_free_resource(nesadapter,
nesadapter->allocated_mrs, stag_index);
kfree(nesmr);
ibmr = ERR_PTR(-E2BIG);
goto reg_user_mr_err;
}
if (root_pbl_index == 1) {
root_vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev,
8192, &root_vpbl.pbl_pbase);
nes_debug(NES_DBG_MR, "Allocating root PBL, va = %p, pa = 0x%08X\n",
root_vpbl.pbl_vbase, (unsigned int)root_vpbl.pbl_pbase);
if (!root_vpbl.pbl_vbase) {
ib_umem_release(region);
pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
vpbl.pbl_pbase);
nes_free_resource(nesadapter, nesadapter->allocated_mrs,
stag_index);
kfree(nesmr);
ibmr = ERR_PTR(-ENOMEM);
goto reg_user_mr_err;
}
root_vpbl.leaf_vpbl = kzalloc(sizeof(*root_vpbl.leaf_vpbl)*1024,
GFP_KERNEL);
if (!root_vpbl.leaf_vpbl) {
ib_umem_release(region);
pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
root_vpbl.pbl_pbase);
pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
vpbl.pbl_pbase);
nes_free_resource(nesadapter, nesadapter->allocated_mrs,
stag_index);
kfree(nesmr);
ibmr = ERR_PTR(-ENOMEM);
goto reg_user_mr_err;
}
root_vpbl.pbl_vbase[0].pa_low =
cpu_to_le32((u32)vpbl.pbl_pbase);
root_vpbl.pbl_vbase[0].pa_high =
cpu_to_le32((u32)((((u64)vpbl.pbl_pbase) >> 32)));
root_vpbl.leaf_vpbl[0] = vpbl;
}
vpbl.pbl_vbase = pci_alloc_consistent(nesdev->pcidev, 4096,
&vpbl.pbl_pbase);
nes_debug(NES_DBG_MR, "Allocating leaf PBL, va = %p, pa = 0x%08X\n",
vpbl.pbl_vbase, (unsigned int)vpbl.pbl_pbase);
if (!vpbl.pbl_vbase) {
ib_umem_release(region);
nes_free_resource(nesadapter, nesadapter->allocated_mrs, stag_index);
ibmr = ERR_PTR(-ENOMEM);
kfree(nesmr);
goto reg_user_mr_err;
}
if (1 <= root_pbl_index) {
root_vpbl.pbl_vbase[root_pbl_index].pa_low =
cpu_to_le32((u32)vpbl.pbl_pbase);
root_vpbl.pbl_vbase[root_pbl_index].pa_high =
cpu_to_le32((u32)((((u64)vpbl.pbl_pbase)>>32)));
root_vpbl.leaf_vpbl[root_pbl_index] = vpbl;
}
root_pbl_index++;
cur_pbl_index = 0;
}
if (single_page) {
if (page_count != 0) {
if ((last_dma_addr+4096) !=
(sg_dma_address(&chunk->page_list[nmap_index])+
(page_index*4096)))
single_page = 0;
last_dma_addr = sg_dma_address(&chunk->page_list[nmap_index])+
(page_index*4096);
} else {
first_dma_addr = sg_dma_address(&chunk->page_list[nmap_index])+
(page_index*4096);
last_dma_addr = first_dma_addr;
}
}
vpbl.pbl_vbase[cur_pbl_index].pa_low =
cpu_to_le32((u32)(sg_dma_address(&chunk->page_list[nmap_index])+
(page_index*4096)));
vpbl.pbl_vbase[cur_pbl_index].pa_high =
cpu_to_le32((u32)((((u64)(sg_dma_address(&chunk->page_list[nmap_index])+
(page_index*4096))) >> 32)));
cur_pbl_index++;
page_count++;
}
}
}
enough_pages:
nes_debug(NES_DBG_MR, "calculating stag, stag_index=0x%08x, driver_key=0x%08x,"
" stag_key=0x%08x\n",
stag_index, driver_key, stag_key);
stag = stag_index << 8;
stag |= driver_key;
stag += (u32)stag_key;
if (stag == 0) {
stag = 1;
}
iova_start = virt;
/* Make the leaf PBL the root if only one PBL */
if (root_pbl_index == 1) {
root_vpbl.pbl_pbase = vpbl.pbl_pbase;
}
if (single_page) {
pbl_count = 0;
} else {
pbl_count = root_pbl_index;
first_dma_addr = 0;
}
nes_debug(NES_DBG_MR, "Registering STag 0x%08X, VA = 0x%08X, length = 0x%08X,"
" index = 0x%08X, region->length=0x%08llx, pbl_count = %u\n",
stag, (unsigned int)iova_start,
(unsigned int)region_length, stag_index,
(unsigned long long)region->length, pbl_count);
ret = nes_reg_mr( nesdev, nespd, stag, region->length, &root_vpbl,
first_dma_addr, pbl_count, (u16)cur_pbl_index, acc, &iova_start);
nes_debug(NES_DBG_MR, "ret=%d\n", ret);
if (ret == 0) {
nesmr->ibmr.rkey = stag;
nesmr->ibmr.lkey = stag;
nesmr->mode = IWNES_MEMREG_TYPE_MEM;
ibmr = &nesmr->ibmr;
nesmr->pbl_4k = ((pbl_count > 1) || (cur_pbl_index > 32)) ? 1 : 0;
nesmr->pbls_used = pbl_count;
if (pbl_count > 1) {
nesmr->pbls_used++;
}
} else {
ib_umem_release(region);
kfree(nesmr);
ibmr = ERR_PTR(-ENOMEM);
}
reg_user_mr_err:
/* free the resources */
if (root_pbl_index == 1) {
pci_free_consistent(nesdev->pcidev, 4096, vpbl.pbl_vbase,
vpbl.pbl_pbase);
} else {
for (page_index=0; page_index<root_pbl_index; page_index++) {
pci_free_consistent(nesdev->pcidev, 4096,
root_vpbl.leaf_vpbl[page_index].pbl_vbase,
root_vpbl.leaf_vpbl[page_index].pbl_pbase);
}
kfree(root_vpbl.leaf_vpbl);
pci_free_consistent(nesdev->pcidev, 8192, root_vpbl.pbl_vbase,
root_vpbl.pbl_pbase);
}
nes_debug(NES_DBG_MR, "Leaving, ibmr=%p", ibmr);
return ibmr;
break;
case IWNES_MEMREG_TYPE_QP:
case IWNES_MEMREG_TYPE_CQ:
nespbl = kzalloc(sizeof(*nespbl), GFP_KERNEL);
if (!nespbl) {
nes_debug(NES_DBG_MR, "Unable to allocate PBL\n");
ib_umem_release(region);
return ERR_PTR(-ENOMEM);
}
nesmr = kzalloc(sizeof(*nesmr), GFP_KERNEL);
if (!nesmr) {
ib_umem_release(region);
kfree(nespbl);
nes_debug(NES_DBG_MR, "Unable to allocate nesmr\n");
return ERR_PTR(-ENOMEM);
}
nesmr->region = region;
nes_ucontext = to_nesucontext(pd->uobject->context);
pbl_depth = region->length >> 12;
pbl_depth += (region->length & (4096-1)) ? 1 : 0;
nespbl->pbl_size = pbl_depth*sizeof(u64);
if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
nes_debug(NES_DBG_MR, "Attempting to allocate QP PBL memory");
} else {
nes_debug(NES_DBG_MR, "Attempting to allocate CP PBL memory");
}
nes_debug(NES_DBG_MR, " %u bytes, %u entries.\n",
nespbl->pbl_size, pbl_depth);
pbl = pci_alloc_consistent(nesdev->pcidev, nespbl->pbl_size,
&nespbl->pbl_pbase);
if (!pbl) {
ib_umem_release(region);
kfree(nesmr);
kfree(nespbl);
nes_debug(NES_DBG_MR, "Unable to allocate PBL memory\n");
return ERR_PTR(-ENOMEM);
}
nespbl->pbl_vbase = (u64 *)pbl;
nespbl->user_base = start;
nes_debug(NES_DBG_MR, "Allocated PBL memory, %u bytes, pbl_pbase=%p,"
" pbl_vbase=%p user_base=0x%lx\n",
nespbl->pbl_size, (void *)nespbl->pbl_pbase,
(void*)nespbl->pbl_vbase, nespbl->user_base);
list_for_each_entry(chunk, &region->chunk_list, list) {
for (nmap_index = 0; nmap_index < chunk->nmap; ++nmap_index) {
chunk_pages = sg_dma_len(&chunk->page_list[nmap_index]) >> 12;
chunk_pages += (sg_dma_len(&chunk->page_list[nmap_index]) & (4096-1)) ? 1 : 0;
nespbl->page = sg_page(&chunk->page_list[0]);
for (page_index=0; page_index<chunk_pages; page_index++) {
((__le32 *)pbl)[0] = cpu_to_le32((u32)
(sg_dma_address(&chunk->page_list[nmap_index])+
(page_index*4096)));
((__le32 *)pbl)[1] = cpu_to_le32(((u64)
(sg_dma_address(&chunk->page_list[nmap_index])+
(page_index*4096)))>>32);
nes_debug(NES_DBG_MR, "pbl=%p, *pbl=0x%016llx, 0x%08x%08x\n", pbl,
(unsigned long long)*pbl,
le32_to_cpu(((__le32 *)pbl)[1]), le32_to_cpu(((__le32 *)pbl)[0]));
pbl++;
}
}
}
if (req.reg_type == IWNES_MEMREG_TYPE_QP) {
list_add_tail(&nespbl->list, &nes_ucontext->qp_reg_mem_list);
} else {
list_add_tail(&nespbl->list, &nes_ucontext->cq_reg_mem_list);
}
nesmr->ibmr.rkey = -1;
nesmr->ibmr.lkey = -1;
nesmr->mode = req.reg_type;
return &nesmr->ibmr;
break;
}
return ERR_PTR(-ENOSYS);
}
/**
* nes_dereg_mr
*/
static int nes_dereg_mr(struct ib_mr *ib_mr)
{
struct nes_mr *nesmr = to_nesmr(ib_mr);
struct nes_vnic *nesvnic = to_nesvnic(ib_mr->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
struct nes_hw_cqp_wqe *cqp_wqe;
struct nes_cqp_request *cqp_request;
unsigned long flags;
int ret;
u16 major_code;
u16 minor_code;
if (nesmr->region) {
ib_umem_release(nesmr->region);
}
if (nesmr->mode != IWNES_MEMREG_TYPE_MEM) {
kfree(nesmr);
return 0;
}
/* Deallocate the region with the adapter */
cqp_request = nes_get_cqp_request(nesdev);
if (cqp_request == NULL) {
nes_debug(NES_DBG_MR, "Failed to get a cqp_request.\n");
return -ENOMEM;
}
cqp_request->waiting = 1;
cqp_wqe = &cqp_request->cqp_wqe;
spin_lock_irqsave(&nesadapter->pbl_lock, flags);
if (nesmr->pbls_used != 0) {
if (nesmr->pbl_4k) {
nesadapter->free_4kpbl += nesmr->pbls_used;
if (nesadapter->free_4kpbl > nesadapter->max_4kpbl) {
printk(KERN_ERR PFX "free 4KB PBLs(%u) has exceeded the max(%u)\n",
nesadapter->free_4kpbl, nesadapter->max_4kpbl);
}
} else {
nesadapter->free_256pbl += nesmr->pbls_used;
if (nesadapter->free_256pbl > nesadapter->max_256pbl) {
printk(KERN_ERR PFX "free 256B PBLs(%u) has exceeded the max(%u)\n",
nesadapter->free_256pbl, nesadapter->max_256pbl);
}
}
}
spin_unlock_irqrestore(&nesadapter->pbl_lock, flags);
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
NES_CQP_DEALLOCATE_STAG | NES_CQP_STAG_VA_TO |
NES_CQP_STAG_DEALLOC_PBLS | NES_CQP_STAG_MR);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_STAG_WQE_STAG_IDX, ib_mr->rkey);
atomic_set(&cqp_request->refcount, 2);
nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
/* Wait for CQP */
nes_debug(NES_DBG_MR, "Waiting for deallocate STag 0x%08X completed\n", ib_mr->rkey);
ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
NES_EVENT_TIMEOUT);
nes_debug(NES_DBG_MR, "Deallocate STag 0x%08X completed, wait_event_timeout ret = %u,"
" CQP Major:Minor codes = 0x%04X:0x%04X\n",
ib_mr->rkey, ret, cqp_request->major_code, cqp_request->minor_code);
nes_free_resource(nesadapter, nesadapter->allocated_mrs,
(ib_mr->rkey & 0x0fffff00) >> 8);
kfree(nesmr);
major_code = cqp_request->major_code;
minor_code = cqp_request->minor_code;
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
if (!ret) {
nes_debug(NES_DBG_MR, "Timeout waiting to destroy STag,"
" ib_mr=%p, rkey = 0x%08X\n",
ib_mr, ib_mr->rkey);
return -ETIME;
} else if (major_code) {
nes_debug(NES_DBG_MR, "Error (0x%04X:0x%04X) while attempting"
" to destroy STag, ib_mr=%p, rkey = 0x%08X\n",
major_code, minor_code, ib_mr, ib_mr->rkey);
return -EIO;
} else
return 0;
}
/**
* show_rev
*/
static ssize_t show_rev(struct class_device *cdev, char *buf)
{
struct nes_ib_device *nesibdev =
container_of(cdev, struct nes_ib_device, ibdev.class_dev);
struct nes_vnic *nesvnic = nesibdev->nesvnic;
nes_debug(NES_DBG_INIT, "\n");
return sprintf(buf, "%x\n", nesvnic->nesdev->nesadapter->hw_rev);
}
/**
* show_fw_ver
*/
static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
{
struct nes_ib_device *nesibdev =
container_of(cdev, struct nes_ib_device, ibdev.class_dev);
struct nes_vnic *nesvnic = nesibdev->nesvnic;
nes_debug(NES_DBG_INIT, "\n");
return sprintf(buf, "%x.%x.%x\n",
(int)(nesvnic->nesdev->nesadapter->fw_ver >> 32),
(int)(nesvnic->nesdev->nesadapter->fw_ver >> 16) & 0xffff,
(int)(nesvnic->nesdev->nesadapter->fw_ver & 0xffff));
}
/**
* show_hca
*/
static ssize_t show_hca(struct class_device *cdev, char *buf)
{
nes_debug(NES_DBG_INIT, "\n");
return sprintf(buf, "NES020\n");
}
/**
* show_board
*/
static ssize_t show_board(struct class_device *cdev, char *buf)
{
nes_debug(NES_DBG_INIT, "\n");
return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
}
static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
static CLASS_DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
static struct class_device_attribute *nes_class_attributes[] = {
&class_device_attr_hw_rev,
&class_device_attr_fw_ver,
&class_device_attr_hca_type,
&class_device_attr_board_id
};
/**
* nes_query_qp
*/
static int nes_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int attr_mask, struct ib_qp_init_attr *init_attr)
{
struct nes_qp *nesqp = to_nesqp(ibqp);
nes_debug(NES_DBG_QP, "\n");
attr->qp_access_flags = 0;
attr->cap.max_send_wr = nesqp->hwqp.sq_size;
attr->cap.max_recv_wr = nesqp->hwqp.rq_size;
attr->cap.max_recv_sge = 1;
if (nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) {
init_attr->cap.max_inline_data = 0;
} else {
init_attr->cap.max_inline_data = 64;
}
init_attr->event_handler = nesqp->ibqp.event_handler;
init_attr->qp_context = nesqp->ibqp.qp_context;
init_attr->send_cq = nesqp->ibqp.send_cq;
init_attr->recv_cq = nesqp->ibqp.recv_cq;
init_attr->srq = nesqp->ibqp.srq = nesqp->ibqp.srq;
init_attr->cap = attr->cap;
return 0;
}
/**
* nes_hw_modify_qp
*/
int nes_hw_modify_qp(struct nes_device *nesdev, struct nes_qp *nesqp,
u32 next_iwarp_state, u32 wait_completion)
{
struct nes_hw_cqp_wqe *cqp_wqe;
/* struct iw_cm_id *cm_id = nesqp->cm_id; */
/* struct iw_cm_event cm_event; */
struct nes_cqp_request *cqp_request;
unsigned long flags;
int ret;
u16 major_code;
nes_debug(NES_DBG_MOD_QP, "QP%u, refcount=%d\n",
nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
cqp_request = nes_get_cqp_request(nesdev);
if (cqp_request == NULL) {
nes_debug(NES_DBG_MOD_QP, "Failed to get a cqp_request.\n");
return -ENOMEM;
}
if (wait_completion) {
cqp_request->waiting = 1;
} else {
cqp_request->waiting = 0;
}
cqp_wqe = &cqp_request->cqp_wqe;
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX,
NES_CQP_MODIFY_QP | NES_CQP_QP_TYPE_IWARP | next_iwarp_state);
nes_debug(NES_DBG_MOD_QP, "using next_iwarp_state=%08x, wqe_words=%08x\n",
next_iwarp_state, le32_to_cpu(cqp_wqe->wqe_words[NES_CQP_WQE_OPCODE_IDX]));
nes_fill_init_cqp_wqe(cqp_wqe, nesdev);
set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX, nesqp->hwqp.qp_id);
set_wqe_64bit_value(cqp_wqe->wqe_words, NES_CQP_QP_WQE_CONTEXT_LOW_IDX, (u64)nesqp->nesqp_context_pbase);
atomic_set(&cqp_request->refcount, 2);
nes_post_cqp_request(nesdev, cqp_request, NES_CQP_REQUEST_RING_DOORBELL);
/* Wait for CQP */
if (wait_completion) {
/* nes_debug(NES_DBG_MOD_QP, "Waiting for modify iWARP QP%u to complete.\n",
nesqp->hwqp.qp_id); */
ret = wait_event_timeout(cqp_request->waitq, (cqp_request->request_done != 0),
NES_EVENT_TIMEOUT);
nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u completed, wait_event_timeout ret=%u, "
"CQP Major:Minor codes = 0x%04X:0x%04X.\n",
nesqp->hwqp.qp_id, ret, cqp_request->major_code, cqp_request->minor_code);
major_code = cqp_request->major_code;
if (major_code) {
nes_debug(NES_DBG_MOD_QP, "Modify iwarp QP%u failed"
"CQP Major:Minor codes = 0x%04X:0x%04X, intended next state = 0x%08X.\n",
nesqp->hwqp.qp_id, cqp_request->major_code,
cqp_request->minor_code, next_iwarp_state);
}
if (atomic_dec_and_test(&cqp_request->refcount)) {
if (cqp_request->dynamic) {
kfree(cqp_request);
} else {
spin_lock_irqsave(&nesdev->cqp.lock, flags);
list_add_tail(&cqp_request->list, &nesdev->cqp_avail_reqs);
spin_unlock_irqrestore(&nesdev->cqp.lock, flags);
}
}
if (!ret)
return -ETIME;
else if (major_code)
return -EIO;
else
return 0;
} else {
return 0;
}
}
/**
* nes_modify_qp
*/
int nes_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata)
{
struct nes_qp *nesqp = to_nesqp(ibqp);
struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
struct nes_device *nesdev = nesvnic->nesdev;
/* u32 cqp_head; */
/* u32 counter; */
u32 next_iwarp_state = 0;
int err;
unsigned long qplockflags;
int ret;
u16 original_last_aeq;
u8 issue_modify_qp = 0;
u8 issue_disconnect = 0;
u8 dont_wait = 0;
nes_debug(NES_DBG_MOD_QP, "QP%u: QP State=%u, cur QP State=%u,"
" iwarp_state=0x%X, refcount=%d\n",
nesqp->hwqp.qp_id, attr->qp_state, nesqp->ibqp_state,
nesqp->iwarp_state, atomic_read(&nesqp->refcount));
nes_add_ref(&nesqp->ibqp);
spin_lock_irqsave(&nesqp->lock, qplockflags);
nes_debug(NES_DBG_MOD_QP, "QP%u: hw_iwarp_state=0x%X, hw_tcp_state=0x%X,"
" QP Access Flags=0x%X, attr_mask = 0x%0x\n",
nesqp->hwqp.qp_id, nesqp->hw_iwarp_state,
nesqp->hw_tcp_state, attr->qp_access_flags, attr_mask);
if (attr_mask & IB_QP_STATE) {
switch (attr->qp_state) {
case IB_QPS_INIT:
nes_debug(NES_DBG_MOD_QP, "QP%u: new state = init\n",
nesqp->hwqp.qp_id);
if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_IDLE) {
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
}
next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
issue_modify_qp = 1;
break;
case IB_QPS_RTR:
nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rtr\n",
nesqp->hwqp.qp_id);
if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_IDLE) {
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
}
next_iwarp_state = NES_CQP_QP_IWARP_STATE_IDLE;
issue_modify_qp = 1;
break;
case IB_QPS_RTS:
nes_debug(NES_DBG_MOD_QP, "QP%u: new state = rts\n",
nesqp->hwqp.qp_id);
if (nesqp->iwarp_state>(u32)NES_CQP_QP_IWARP_STATE_RTS) {
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
}
if (nesqp->cm_id == NULL) {
nes_debug(NES_DBG_MOD_QP, "QP%u: Failing attempt to move QP to RTS without a CM_ID. \n",
nesqp->hwqp.qp_id );
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
}
next_iwarp_state = NES_CQP_QP_IWARP_STATE_RTS;
if (nesqp->iwarp_state != NES_CQP_QP_IWARP_STATE_RTS)
next_iwarp_state |= NES_CQP_QP_CONTEXT_VALID |
NES_CQP_QP_ARP_VALID | NES_CQP_QP_ORD_VALID;
issue_modify_qp = 1;
nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_ESTABLISHED;
nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_RTS;
nesqp->hte_added = 1;
break;
case IB_QPS_SQD:
issue_modify_qp = 1;
nes_debug(NES_DBG_MOD_QP, "QP%u: new state=closing. SQ head=%u, SQ tail=%u\n",
nesqp->hwqp.qp_id, nesqp->hwqp.sq_head, nesqp->hwqp.sq_tail);
if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return 0;
} else {
if (nesqp->iwarp_state > (u32)NES_CQP_QP_IWARP_STATE_CLOSING) {
nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
" ignored due to current iWARP state\n",
nesqp->hwqp.qp_id);
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
}
if (nesqp->hw_iwarp_state != NES_AEQE_IWARP_STATE_RTS) {
nes_debug(NES_DBG_MOD_QP, "QP%u: State change to closing"
" already done based on hw state.\n",
nesqp->hwqp.qp_id);
issue_modify_qp = 0;
nesqp->in_disconnect = 0;
}
switch (nesqp->hw_iwarp_state) {
case NES_AEQE_IWARP_STATE_CLOSING:
next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
case NES_AEQE_IWARP_STATE_TERMINATE:
next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
break;
case NES_AEQE_IWARP_STATE_ERROR:
next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
break;
default:
next_iwarp_state = NES_CQP_QP_IWARP_STATE_CLOSING;
nesqp->in_disconnect = 1;
nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_CLOSING;
break;
}
}
break;
case IB_QPS_SQE:
nes_debug(NES_DBG_MOD_QP, "QP%u: new state = terminate\n",
nesqp->hwqp.qp_id);
if (nesqp->iwarp_state>=(u32)NES_CQP_QP_IWARP_STATE_TERMINATE) {
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
}
/* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
next_iwarp_state = NES_CQP_QP_IWARP_STATE_TERMINATE;
nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_TERMINATE;
issue_modify_qp = 1;
nesqp->in_disconnect = 1;
break;
case IB_QPS_ERR:
case IB_QPS_RESET:
if (nesqp->iwarp_state == (u32)NES_CQP_QP_IWARP_STATE_ERROR) {
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
}
nes_debug(NES_DBG_MOD_QP, "QP%u: new state = error\n",
nesqp->hwqp.qp_id);
next_iwarp_state = NES_CQP_QP_IWARP_STATE_ERROR;
/* next_iwarp_state = (NES_CQP_QP_IWARP_STATE_TERMINATE | 0x02000000); */
if (nesqp->hte_added) {
nes_debug(NES_DBG_MOD_QP, "set CQP_QP_DEL_HTE\n");
next_iwarp_state |= NES_CQP_QP_DEL_HTE;
nesqp->hte_added = 0;
}
if ((nesqp->hw_tcp_state > NES_AEQE_TCP_STATE_CLOSED) &&
(nesqp->hw_tcp_state != NES_AEQE_TCP_STATE_TIME_WAIT)) {
next_iwarp_state |= NES_CQP_QP_RESET;
nesqp->in_disconnect = 1;
} else {
nes_debug(NES_DBG_MOD_QP, "QP%u NOT setting NES_CQP_QP_RESET since TCP state = %u\n",
nesqp->hwqp.qp_id, nesqp->hw_tcp_state);
dont_wait = 1;
}
issue_modify_qp = 1;
nesqp->hw_iwarp_state = NES_AEQE_IWARP_STATE_ERROR;
break;
default:
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_rem_ref(&nesqp->ibqp);
return -EINVAL;
break;
}
nesqp->ibqp_state = attr->qp_state;
if (((nesqp->iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) ==
(u32)NES_CQP_QP_IWARP_STATE_RTS) &&
((next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK) >
(u32)NES_CQP_QP_IWARP_STATE_RTS)) {
nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
nesqp->iwarp_state);
issue_disconnect = 1;
} else {
nesqp->iwarp_state = next_iwarp_state & NES_CQP_QP_IWARP_STATE_MASK;
nes_debug(NES_DBG_MOD_QP, "Change nesqp->iwarp_state=%08x\n",
nesqp->iwarp_state);
}
}
if (attr_mask & IB_QP_ACCESS_FLAGS) {
if (attr->qp_access_flags & IB_ACCESS_LOCAL_WRITE) {
nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
NES_QPCONTEXT_MISC_RDMA_READ_EN);
issue_modify_qp = 1;
}
if (attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE) {
nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN);
issue_modify_qp = 1;
}
if (attr->qp_access_flags & IB_ACCESS_REMOTE_READ) {
nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_READ_EN);
issue_modify_qp = 1;
}
if (attr->qp_access_flags & IB_ACCESS_MW_BIND) {
nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_WBIND_EN);
issue_modify_qp = 1;
}
if (nesqp->user_mode) {
nesqp->nesqp_context->misc |= cpu_to_le32(NES_QPCONTEXT_MISC_RDMA_WRITE_EN |
NES_QPCONTEXT_MISC_RDMA_READ_EN);
issue_modify_qp = 1;
}
}
original_last_aeq = nesqp->last_aeq;
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_debug(NES_DBG_MOD_QP, "issue_modify_qp=%u\n", issue_modify_qp);
ret = 0;
if (issue_modify_qp) {
nes_debug(NES_DBG_MOD_QP, "call nes_hw_modify_qp\n");
ret = nes_hw_modify_qp(nesdev, nesqp, next_iwarp_state, 1);
if (ret)
nes_debug(NES_DBG_MOD_QP, "nes_hw_modify_qp (next_iwarp_state = 0x%08X)"
" failed for QP%u.\n",
next_iwarp_state, nesqp->hwqp.qp_id);
}
if ((issue_modify_qp) && (nesqp->ibqp_state > IB_QPS_RTS)) {
nes_debug(NES_DBG_MOD_QP, "QP%u Issued ModifyQP refcount (%d),"
" original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
original_last_aeq, nesqp->last_aeq);
if ((!ret) ||
((original_last_aeq != NES_AEQE_AEID_RDMAP_ROE_BAD_LLP_CLOSE) &&
(ret))) {
if (dont_wait) {
if (nesqp->cm_id && nesqp->hw_tcp_state != 0) {
nes_debug(NES_DBG_MOD_QP, "QP%u Queuing fake disconnect for QP refcount (%d),"
" original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
original_last_aeq, nesqp->last_aeq);
/* this one is for the cm_disconnect thread */
nes_add_ref(&nesqp->ibqp);
spin_lock_irqsave(&nesqp->lock, qplockflags);
nesqp->hw_tcp_state = NES_AEQE_TCP_STATE_CLOSED;
nesqp->last_aeq = NES_AEQE_AEID_RESET_SENT;
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_cm_disconn(nesqp);
} else {
nes_debug(NES_DBG_MOD_QP, "QP%u No fake disconnect, QP refcount=%d\n",
nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
nes_rem_ref(&nesqp->ibqp);
}
} else {
spin_lock_irqsave(&nesqp->lock, qplockflags);
if (nesqp->cm_id) {
/* These two are for the timer thread */
if (atomic_inc_return(&nesqp->close_timer_started) == 1) {
nes_add_ref(&nesqp->ibqp);
nesqp->cm_id->add_ref(nesqp->cm_id);
nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
" need ae to finish up, original_last_aeq = 0x%04X."
" last_aeq = 0x%04X, scheduling timer.\n",
nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
original_last_aeq, nesqp->last_aeq);
schedule_nes_timer(nesqp->cm_node, (struct sk_buff *) nesqp, NES_TIMER_TYPE_CLOSE, 1, 0);
}
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
} else {
spin_unlock_irqrestore(&nesqp->lock, qplockflags);
nes_debug(NES_DBG_MOD_QP, "QP%u Not decrementing QP refcount (%d),"
" need ae to finish up, original_last_aeq = 0x%04X."
" last_aeq = 0x%04X.\n",
nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
original_last_aeq, nesqp->last_aeq);
}
}
} else {
nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
" original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
original_last_aeq, nesqp->last_aeq);
nes_rem_ref(&nesqp->ibqp);
}
} else {
nes_debug(NES_DBG_MOD_QP, "QP%u Decrementing QP refcount (%d), No ae to finish up,"
" original_last_aeq = 0x%04X. last_aeq = 0x%04X.\n",
nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount),
original_last_aeq, nesqp->last_aeq);
nes_rem_ref(&nesqp->ibqp);
}
err = 0;
nes_debug(NES_DBG_MOD_QP, "QP%u Leaving, refcount=%d\n",
nesqp->hwqp.qp_id, atomic_read(&nesqp->refcount));
return err;
}
/**
* nes_muticast_attach
*/
static int nes_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
{
nes_debug(NES_DBG_INIT, "\n");
return -ENOSYS;
}
/**
* nes_multicast_detach
*/
static int nes_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
{
nes_debug(NES_DBG_INIT, "\n");
return -ENOSYS;
}
/**
* nes_process_mad
*/
static int nes_process_mad(struct ib_device *ibdev, int mad_flags,
u8 port_num, struct ib_wc *in_wc, struct ib_grh *in_grh,
struct ib_mad *in_mad, struct ib_mad *out_mad)
{
nes_debug(NES_DBG_INIT, "\n");
return -ENOSYS;
}
static inline void
fill_wqe_sg_send(struct nes_hw_qp_wqe *wqe, struct ib_send_wr *ib_wr, u32 uselkey)
{
int sge_index;
int total_payload_length = 0;
for (sge_index = 0; sge_index < ib_wr->num_sge; sge_index++) {
set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
ib_wr->sg_list[sge_index].addr);
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_LENGTH0_IDX + (sge_index*4),
ib_wr->sg_list[sge_index].length);
if (uselkey)
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4),
(ib_wr->sg_list[sge_index].lkey));
else
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX + (sge_index*4), 0);
total_payload_length += ib_wr->sg_list[sge_index].length;
}
nes_debug(NES_DBG_IW_TX, "UC UC UC, sending total_payload_length=%u \n",
total_payload_length);
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
total_payload_length);
}
/**
* nes_post_send
*/
static int nes_post_send(struct ib_qp *ibqp, struct ib_send_wr *ib_wr,
struct ib_send_wr **bad_wr)
{
u64 u64temp;
unsigned long flags = 0;
struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_qp *nesqp = to_nesqp(ibqp);
struct nes_hw_qp_wqe *wqe;
int err;
u32 qsize = nesqp->hwqp.sq_size;
u32 head;
u32 wqe_misc;
u32 wqe_count;
u32 counter;
u32 total_payload_length;
err = 0;
wqe_misc = 0;
wqe_count = 0;
total_payload_length = 0;
if (nesqp->ibqp_state > IB_QPS_RTS)
return -EINVAL;
spin_lock_irqsave(&nesqp->lock, flags);
head = nesqp->hwqp.sq_head;
while (ib_wr) {
/* Check for SQ overflow */
if (((head + (2 * qsize) - nesqp->hwqp.sq_tail) % qsize) == (qsize - 1)) {
err = -EINVAL;
break;
}
wqe = &nesqp->hwqp.sq_vbase[head];
/* nes_debug(NES_DBG_IW_TX, "processing sq wqe for QP%u at %p, head = %u.\n",
nesqp->hwqp.qp_id, wqe, head); */
nes_fill_init_qp_wqe(wqe, nesqp, head);
u64temp = (u64)(ib_wr->wr_id);
set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
u64temp);
switch (ib_wr->opcode) {
case IB_WR_SEND:
if (ib_wr->send_flags & IB_SEND_SOLICITED) {
wqe_misc = NES_IWARP_SQ_OP_SENDSE;
} else {
wqe_misc = NES_IWARP_SQ_OP_SEND;
}
if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
err = -EINVAL;
break;
}
if (ib_wr->send_flags & IB_SEND_FENCE) {
wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
}
if ((ib_wr->send_flags & IB_SEND_INLINE) &&
((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
(ib_wr->sg_list[0].length <= 64)) {
memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
(void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
ib_wr->sg_list[0].length);
wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
} else {
fill_wqe_sg_send(wqe, ib_wr, 1);
}
break;
case IB_WR_RDMA_WRITE:
wqe_misc = NES_IWARP_SQ_OP_RDMAW;
if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=%u\n",
ib_wr->num_sge,
nesdev->nesadapter->max_sge);
err = -EINVAL;
break;
}
if (ib_wr->send_flags & IB_SEND_FENCE) {
wqe_misc |= NES_IWARP_SQ_WQE_LOCAL_FENCE;
}
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
ib_wr->wr.rdma.rkey);
set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
ib_wr->wr.rdma.remote_addr);
if ((ib_wr->send_flags & IB_SEND_INLINE) &&
((nes_drv_opt & NES_DRV_OPT_NO_INLINE_DATA) == 0) &&
(ib_wr->sg_list[0].length <= 64)) {
memcpy(&wqe->wqe_words[NES_IWARP_SQ_WQE_IMM_DATA_START_IDX],
(void *)(unsigned long)ib_wr->sg_list[0].addr, ib_wr->sg_list[0].length);
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX,
ib_wr->sg_list[0].length);
wqe_misc |= NES_IWARP_SQ_WQE_IMM_DATA;
} else {
fill_wqe_sg_send(wqe, ib_wr, 1);
}
wqe->wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX] =
wqe->wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX];
break;
case IB_WR_RDMA_READ:
/* iWARP only supports 1 sge for RDMA reads */
if (ib_wr->num_sge > 1) {
nes_debug(NES_DBG_IW_TX, "Exceeded max sge, ib_wr=%u, max=1\n",
ib_wr->num_sge);
err = -EINVAL;
break;
}
wqe_misc = NES_IWARP_SQ_OP_RDMAR;
set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_TO_LOW_IDX,
ib_wr->wr.rdma.remote_addr);
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_STAG_IDX,
ib_wr->wr.rdma.rkey);
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX,
ib_wr->sg_list->length);
set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_FRAG0_LOW_IDX,
ib_wr->sg_list->addr);
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_STAG0_IDX,
ib_wr->sg_list->lkey);
break;
default:
/* error */
err = -EINVAL;
break;
}
if (ib_wr->send_flags & IB_SEND_SIGNALED) {
wqe_misc |= NES_IWARP_SQ_WQE_SIGNALED_COMPL;
}
wqe->wqe_words[NES_IWARP_SQ_WQE_MISC_IDX] = cpu_to_le32(wqe_misc);
ib_wr = ib_wr->next;
head++;
wqe_count++;
if (head >= qsize)
head = 0;
}
nesqp->hwqp.sq_head = head;
barrier();
while (wqe_count) {
counter = min(wqe_count, ((u32)255));
wqe_count -= counter;
nes_write32(nesdev->regs + NES_WQE_ALLOC,
(counter << 24) | 0x00800000 | nesqp->hwqp.qp_id);
}
spin_unlock_irqrestore(&nesqp->lock, flags);
if (err)
*bad_wr = ib_wr;
return err;
}
/**
* nes_post_recv
*/
static int nes_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *ib_wr,
struct ib_recv_wr **bad_wr)
{
u64 u64temp;
unsigned long flags = 0;
struct nes_vnic *nesvnic = to_nesvnic(ibqp->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_qp *nesqp = to_nesqp(ibqp);
struct nes_hw_qp_wqe *wqe;
int err = 0;
int sge_index;
u32 qsize = nesqp->hwqp.rq_size;
u32 head;
u32 wqe_count = 0;
u32 counter;
u32 total_payload_length;
if (nesqp->ibqp_state > IB_QPS_RTS)
return -EINVAL;
spin_lock_irqsave(&nesqp->lock, flags);
head = nesqp->hwqp.rq_head;
while (ib_wr) {
if (ib_wr->num_sge > nesdev->nesadapter->max_sge) {
err = -EINVAL;
break;
}
/* Check for RQ overflow */
if (((head + (2 * qsize) - nesqp->hwqp.rq_tail) % qsize) == (qsize - 1)) {
err = -EINVAL;
break;
}
nes_debug(NES_DBG_IW_RX, "ibwr sge count = %u.\n", ib_wr->num_sge);
wqe = &nesqp->hwqp.rq_vbase[head];
/* nes_debug(NES_DBG_IW_RX, "QP%u:processing rq wqe at %p, head = %u.\n",
nesqp->hwqp.qp_id, wqe, head); */
nes_fill_init_qp_wqe(wqe, nesqp, head);
u64temp = (u64)(ib_wr->wr_id);
set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX,
u64temp);
total_payload_length = 0;
for (sge_index=0; sge_index < ib_wr->num_sge; sge_index++) {
set_wqe_64bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_FRAG0_LOW_IDX+(sge_index*4),
ib_wr->sg_list[sge_index].addr);
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_LENGTH0_IDX+(sge_index*4),
ib_wr->sg_list[sge_index].length);
set_wqe_32bit_value(wqe->wqe_words,NES_IWARP_RQ_WQE_STAG0_IDX+(sge_index*4),
ib_wr->sg_list[sge_index].lkey);
total_payload_length += ib_wr->sg_list[sge_index].length;
}
set_wqe_32bit_value(wqe->wqe_words, NES_IWARP_RQ_WQE_TOTAL_PAYLOAD_IDX,
total_payload_length);
ib_wr = ib_wr->next;
head++;
wqe_count++;
if (head >= qsize)
head = 0;
}
nesqp->hwqp.rq_head = head;
barrier();
while (wqe_count) {
counter = min(wqe_count, ((u32)255));
wqe_count -= counter;
nes_write32(nesdev->regs+NES_WQE_ALLOC, (counter<<24) | nesqp->hwqp.qp_id);
}
spin_unlock_irqrestore(&nesqp->lock, flags);
if (err)
*bad_wr = ib_wr;
return err;
}
/**
* nes_poll_cq
*/
static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
{
u64 u64temp;
u64 wrid;
/* u64 u64temp; */
unsigned long flags = 0;
struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_cq *nescq = to_nescq(ibcq);
struct nes_qp *nesqp;
struct nes_hw_cqe cqe;
u32 head;
u32 wq_tail;
u32 cq_size;
u32 cqe_count = 0;
u32 wqe_index;
u32 u32temp;
/* u32 counter; */
nes_debug(NES_DBG_CQ, "\n");
spin_lock_irqsave(&nescq->lock, flags);
head = nescq->hw_cq.cq_head;
cq_size = nescq->hw_cq.cq_size;
while (cqe_count < num_entries) {
if (le32_to_cpu(nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX]) &
NES_CQE_VALID) {
cqe = nescq->hw_cq.cq_vbase[head];
nescq->hw_cq.cq_vbase[head].cqe_words[NES_CQE_OPCODE_IDX] = 0;
u32temp = le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_LOW_IDX]);
wqe_index = u32temp &
(nesdev->nesadapter->max_qp_wr - 1);
u32temp &= ~(NES_SW_CONTEXT_ALIGN-1);
/* parse CQE, get completion context from WQE (either rq or sq */
u64temp = (((u64)(le32_to_cpu(cqe.cqe_words[NES_CQE_COMP_COMP_CTX_HIGH_IDX])))<<32) |
((u64)u32temp);
nesqp = *((struct nes_qp **)&u64temp);
memset(entry, 0, sizeof *entry);
if (cqe.cqe_words[NES_CQE_ERROR_CODE_IDX] == 0) {
entry->status = IB_WC_SUCCESS;
} else {
entry->status = IB_WC_WR_FLUSH_ERR;
}
entry->qp = &nesqp->ibqp;
entry->src_qp = nesqp->hwqp.qp_id;
if (le32_to_cpu(cqe.cqe_words[NES_CQE_OPCODE_IDX]) & NES_CQE_SQ) {
if (nesqp->skip_lsmm) {
nesqp->skip_lsmm = 0;
wq_tail = nesqp->hwqp.sq_tail++;
}
/* Working on a SQ Completion*/
wq_tail = wqe_index;
nesqp->hwqp.sq_tail = (wqe_index+1)&(nesqp->hwqp.sq_size - 1);
wrid = (((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wq_tail].
wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_HIGH_IDX]))) << 32) |
((u64)(cpu_to_le32((u32)nesqp->hwqp.sq_vbase[wq_tail].
wqe_words[NES_IWARP_SQ_WQE_COMP_SCRATCH_LOW_IDX])));
entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wq_tail].
wqe_words[NES_IWARP_SQ_WQE_TOTAL_PAYLOAD_IDX]);
switch (le32_to_cpu(nesqp->hwqp.sq_vbase[wq_tail].
wqe_words[NES_IWARP_SQ_WQE_MISC_IDX]) & 0x3f) {
case NES_IWARP_SQ_OP_RDMAW:
nes_debug(NES_DBG_CQ, "Operation = RDMA WRITE.\n");
entry->opcode = IB_WC_RDMA_WRITE;
break;
case NES_IWARP_SQ_OP_RDMAR:
nes_debug(NES_DBG_CQ, "Operation = RDMA READ.\n");
entry->opcode = IB_WC_RDMA_READ;
entry->byte_len = le32_to_cpu(nesqp->hwqp.sq_vbase[wq_tail].
wqe_words[NES_IWARP_SQ_WQE_RDMA_LENGTH_IDX]);
break;
case NES_IWARP_SQ_OP_SENDINV:
case NES_IWARP_SQ_OP_SENDSEINV:
case NES_IWARP_SQ_OP_SEND:
case NES_IWARP_SQ_OP_SENDSE:
nes_debug(NES_DBG_CQ, "Operation = Send.\n");
entry->opcode = IB_WC_SEND;
break;
}
} else {
/* Working on a RQ Completion*/
wq_tail = wqe_index;
nesqp->hwqp.rq_tail = (wqe_index+1)&(nesqp->hwqp.rq_size - 1);
entry->byte_len = le32_to_cpu(cqe.cqe_words[NES_CQE_PAYLOAD_LENGTH_IDX]);
wrid = ((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wq_tail].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_LOW_IDX]))) |
((u64)(le32_to_cpu(nesqp->hwqp.rq_vbase[wq_tail].wqe_words[NES_IWARP_RQ_WQE_COMP_SCRATCH_HIGH_IDX]))<<32);
entry->opcode = IB_WC_RECV;
}
entry->wr_id = wrid;
if (++head >= cq_size)
head = 0;
cqe_count++;
nescq->polled_completions++;
if ((nescq->polled_completions > (cq_size / 2)) ||
(nescq->polled_completions == 255)) {
nes_debug(NES_DBG_CQ, "CQ%u Issuing CQE Allocate since more than half of cqes"
" are pending %u of %u.\n",
nescq->hw_cq.cq_number, nescq->polled_completions, cq_size);
nes_write32(nesdev->regs+NES_CQE_ALLOC,
nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
nescq->polled_completions = 0;
}
entry++;
} else
break;
}
if (nescq->polled_completions) {
nes_write32(nesdev->regs+NES_CQE_ALLOC,
nescq->hw_cq.cq_number | (nescq->polled_completions << 16));
nescq->polled_completions = 0;
}
nescq->hw_cq.cq_head = head;
nes_debug(NES_DBG_CQ, "Reporting %u completions for CQ%u.\n",
cqe_count, nescq->hw_cq.cq_number);
spin_unlock_irqrestore(&nescq->lock, flags);
return cqe_count;
}
/**
* nes_req_notify_cq
*/
static int nes_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags)
{
struct nes_vnic *nesvnic = to_nesvnic(ibcq->device);
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_cq *nescq = to_nescq(ibcq);
u32 cq_arm;
nes_debug(NES_DBG_CQ, "Requesting notification for CQ%u.\n",
nescq->hw_cq.cq_number);
cq_arm = nescq->hw_cq.cq_number;
if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_NEXT_COMP)
cq_arm |= NES_CQE_ALLOC_NOTIFY_NEXT;
else if ((notify_flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
cq_arm |= NES_CQE_ALLOC_NOTIFY_SE;
else
return -EINVAL;
nes_write32(nesdev->regs+NES_CQE_ALLOC, cq_arm);
nes_read32(nesdev->regs+NES_CQE_ALLOC);
return 0;
}
/**
* nes_init_ofa_device
*/
struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
{
struct nes_ib_device *nesibdev;
struct nes_vnic *nesvnic = netdev_priv(netdev);
struct nes_device *nesdev = nesvnic->nesdev;
nesibdev = (struct nes_ib_device *)ib_alloc_device(sizeof(struct nes_ib_device));
if (nesibdev == NULL) {
return NULL;
}
strlcpy(nesibdev->ibdev.name, "nes%d", IB_DEVICE_NAME_MAX);
nesibdev->ibdev.owner = THIS_MODULE;
nesibdev->ibdev.node_type = RDMA_NODE_RNIC;
memset(&nesibdev->ibdev.node_guid, 0, sizeof(nesibdev->ibdev.node_guid));
memcpy(&nesibdev->ibdev.node_guid, netdev->dev_addr, 6);
nesibdev->ibdev.uverbs_cmd_mask =
(1ull << IB_USER_VERBS_CMD_GET_CONTEXT) |
(1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
(1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
(1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
(1ull << IB_USER_VERBS_CMD_DEALLOC_PD) |
(1ull << IB_USER_VERBS_CMD_REG_MR) |
(1ull << IB_USER_VERBS_CMD_DEREG_MR) |
(1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
(1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
(1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
(1ull << IB_USER_VERBS_CMD_CREATE_AH) |
(1ull << IB_USER_VERBS_CMD_DESTROY_AH) |
(1ull << IB_USER_VERBS_CMD_REQ_NOTIFY_CQ) |
(1ull << IB_USER_VERBS_CMD_CREATE_QP) |
(1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
(1ull << IB_USER_VERBS_CMD_POLL_CQ) |
(1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
(1ull << IB_USER_VERBS_CMD_ALLOC_MW) |
(1ull << IB_USER_VERBS_CMD_BIND_MW) |
(1ull << IB_USER_VERBS_CMD_DEALLOC_MW) |
(1ull << IB_USER_VERBS_CMD_POST_RECV) |
(1ull << IB_USER_VERBS_CMD_POST_SEND);
nesibdev->ibdev.phys_port_cnt = 1;
nesibdev->ibdev.num_comp_vectors = 1;
nesibdev->ibdev.dma_device = &nesdev->pcidev->dev;
nesibdev->ibdev.class_dev.dev = &nesdev->pcidev->dev;
nesibdev->ibdev.query_device = nes_query_device;
nesibdev->ibdev.query_port = nes_query_port;
nesibdev->ibdev.modify_port = nes_modify_port;
nesibdev->ibdev.query_pkey = nes_query_pkey;
nesibdev->ibdev.query_gid = nes_query_gid;
nesibdev->ibdev.alloc_ucontext = nes_alloc_ucontext;
nesibdev->ibdev.dealloc_ucontext = nes_dealloc_ucontext;
nesibdev->ibdev.mmap = nes_mmap;
nesibdev->ibdev.alloc_pd = nes_alloc_pd;
nesibdev->ibdev.dealloc_pd = nes_dealloc_pd;
nesibdev->ibdev.create_ah = nes_create_ah;
nesibdev->ibdev.destroy_ah = nes_destroy_ah;
nesibdev->ibdev.create_qp = nes_create_qp;
nesibdev->ibdev.modify_qp = nes_modify_qp;
nesibdev->ibdev.query_qp = nes_query_qp;
nesibdev->ibdev.destroy_qp = nes_destroy_qp;
nesibdev->ibdev.create_cq = nes_create_cq;
nesibdev->ibdev.destroy_cq = nes_destroy_cq;
nesibdev->ibdev.poll_cq = nes_poll_cq;
nesibdev->ibdev.get_dma_mr = nes_get_dma_mr;
nesibdev->ibdev.reg_phys_mr = nes_reg_phys_mr;
nesibdev->ibdev.reg_user_mr = nes_reg_user_mr;
nesibdev->ibdev.dereg_mr = nes_dereg_mr;
nesibdev->ibdev.alloc_mw = nes_alloc_mw;
nesibdev->ibdev.dealloc_mw = nes_dealloc_mw;
nesibdev->ibdev.bind_mw = nes_bind_mw;
nesibdev->ibdev.alloc_fmr = nes_alloc_fmr;
nesibdev->ibdev.unmap_fmr = nes_unmap_fmr;
nesibdev->ibdev.dealloc_fmr = nes_dealloc_fmr;
nesibdev->ibdev.map_phys_fmr = nes_map_phys_fmr;
nesibdev->ibdev.attach_mcast = nes_multicast_attach;
nesibdev->ibdev.detach_mcast = nes_multicast_detach;
nesibdev->ibdev.process_mad = nes_process_mad;
nesibdev->ibdev.req_notify_cq = nes_req_notify_cq;
nesibdev->ibdev.post_send = nes_post_send;
nesibdev->ibdev.post_recv = nes_post_recv;
nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
if (nesibdev->ibdev.iwcm == NULL) {
ib_dealloc_device(&nesibdev->ibdev);
return NULL;
}
nesibdev->ibdev.iwcm->add_ref = nes_add_ref;
nesibdev->ibdev.iwcm->rem_ref = nes_rem_ref;
nesibdev->ibdev.iwcm->get_qp = nes_get_qp;
nesibdev->ibdev.iwcm->connect = nes_connect;
nesibdev->ibdev.iwcm->accept = nes_accept;
nesibdev->ibdev.iwcm->reject = nes_reject;
nesibdev->ibdev.iwcm->create_listen = nes_create_listen;
nesibdev->ibdev.iwcm->destroy_listen = nes_destroy_listen;
return nesibdev;
}
/**
* nes_destroy_ofa_device
*/
void nes_destroy_ofa_device(struct nes_ib_device *nesibdev)
{
if (nesibdev == NULL)
return;
nes_unregister_ofa_device(nesibdev);
kfree(nesibdev->ibdev.iwcm);
ib_dealloc_device(&nesibdev->ibdev);
}
/**
* nes_register_ofa_device
*/
int nes_register_ofa_device(struct nes_ib_device *nesibdev)
{
struct nes_vnic *nesvnic = nesibdev->nesvnic;
struct nes_device *nesdev = nesvnic->nesdev;
struct nes_adapter *nesadapter = nesdev->nesadapter;
int i, ret;
ret = ib_register_device(&nesvnic->nesibdev->ibdev);
if (ret) {
return ret;
}
/* Get the resources allocated to this device */
nesibdev->max_cq = (nesadapter->max_cq-NES_FIRST_QPN) / nesadapter->port_count;
nesibdev->max_mr = nesadapter->max_mr / nesadapter->port_count;
nesibdev->max_qp = (nesadapter->max_qp-NES_FIRST_QPN) / nesadapter->port_count;
nesibdev->max_pd = nesadapter->max_pd / nesadapter->port_count;
for (i = 0; i < ARRAY_SIZE(nes_class_attributes); ++i) {
ret = class_device_create_file(&nesibdev->ibdev.class_dev, nes_class_attributes[i]);
if (ret) {
while (i > 0) {
i--;
class_device_remove_file(&nesibdev->ibdev.class_dev,
nes_class_attributes[i]);
}
ib_unregister_device(&nesibdev->ibdev);
return ret;
}
}
nesvnic->of_device_registered = 1;
return 0;
}
/**
* nes_unregister_ofa_device
*/
void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
{
struct nes_vnic *nesvnic = nesibdev->nesvnic;
int i;
if (nesibdev == NULL)
return;
for (i = 0; i < ARRAY_SIZE(nes_class_attributes); ++i) {
class_device_remove_file(&nesibdev->ibdev.class_dev, nes_class_attributes[i]);
}
if (nesvnic->of_device_registered) {
ib_unregister_device(&nesibdev->ibdev);
}
nesvnic->of_device_registered = 0;
}
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