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31d1e340f0
linux_dsm_epyc7002/drivers/infiniband/hw/nes/nes_verbs.c
Roland Dreier 31d1e340f0 RDMA/nes: Remove volatile qualifier from struct nes_hw_cq.cq_vbase 
Remove the volatile qualifier from the cq_vbase member of struct
nes_hw_cq, and add an rmb() in the one place where it looks like
access order might make a difference.  As usual, removing a volatile
qualifier in a declaration is actually a bug fix, since a volatile
qualifier is not sufficient to make sure that aggressively
out-of-order CPUs don't reorder things and cause incorrect results.

For example, a CPU might speculatively execute reads of other cqe
fields before the NIC hardware has written those fields and before it
has set the NES_CQE_VALID bit (even though those reads come after the
test of the NES_CQE_VALID bit in program order), but then when the CPU
actually executes the conditional test of the NES_CQE_VALID, the bit
has been set, and the CPU will proceed with the results of the earlier
speculative execution and end up using bogus data.

This also gets rid of the warning:

    drivers/infiniband/hw/nes/nes_verbs.c: In function 'nes_destroy_cq':
    drivers/infiniband/hw/nes/nes_verbs.c:1978: warning: passing argument 3 of 'pci_free_consistent' discards qualifiers from pointer target type

Signed-off-by: Roland Dreier <rolandd@cisco.com>
2008-04-23 11:55:45 -07:00

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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;
static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev);
/**
* 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=%lx\n",
nespbl->pbl_size, pbl_entries,
(void *)nespbl->pbl_vbase,
(unsigned long) 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=%lx rq_vbase=%p rq_pbase=%lx\n",
nesqp->hwqp.sq_vbase, (unsigned long) nesqp->hwqp.sq_pbase,
nesqp->hwqp.rq_vbase, (unsigned long) 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; */
if (init_attr->create_flags)
return ERR_PTR(-EINVAL);
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);
}
}
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",
__func__, 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",
__func__, 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,
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=%lx,"
" pbl_vbase=%p user_base=0x%lx\n",
nespbl->pbl_size, (unsigned long) 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 device *dev, struct device_attribute *attr,
char *buf)
{
struct nes_ib_device *nesibdev =
container_of(dev, struct nes_ib_device, ibdev.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 device *dev, struct device_attribute *attr,
char *buf)
{
struct nes_ib_device *nesibdev =
container_of(dev, struct nes_ib_device, ibdev.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 device *dev, struct device_attribute *attr,
char *buf)
{
nes_debug(NES_DBG_INIT, "\n");
return sprintf(buf, "NES020\n");
}
/**
* show_board
*/
static ssize_t show_board(struct device *dev, struct device_attribute *attr,
char *buf)
{
nes_debug(NES_DBG_INIT, "\n");
return sprintf(buf, "%.*s\n", 32, "NES020 Board ID");
}
static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
static DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
static DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
static struct device_attribute *nes_dev_attributes[] = {
&dev_attr_hw_rev,
&dev_attr_fw_ver,
&dev_attr_hca_type,
&dev_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) {
/*
* Make sure we read CQ entry contents *after*
* we've checked the valid bit.
*/
rmb();
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.dev.parent = &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_dev_attributes); ++i) {
ret = device_create_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
if (ret) {
while (i > 0) {
i--;
device_remove_file(&nesibdev->ibdev.dev,
nes_dev_attributes[i]);
}
ib_unregister_device(&nesibdev->ibdev);
return ret;
}
}
nesvnic->of_device_registered = 1;
return 0;
}
/**
* nes_unregister_ofa_device
*/
static void nes_unregister_ofa_device(struct nes_ib_device *nesibdev)
{
struct nes_vnic *nesvnic = nesibdev->nesvnic;
int i;
for (i = 0; i < ARRAY_SIZE(nes_dev_attributes); ++i) {
device_remove_file(&nesibdev->ibdev.dev, nes_dev_attributes[i]);
}
if (nesvnic->of_device_registered) {
ib_unregister_device(&nesibdev->ibdev);
}
nesvnic->of_device_registered = 0;
}
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