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linux/drivers/infiniband/hw/cxgb3/iwch_provider.c

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/*
* Copyright (c) 2006 Chelsio, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/ethtool.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/byteorder.h>
#include <rdma/iw_cm.h>
#include <rdma/ib_verbs.h>
#include <rdma/ib_smi.h>
#include <rdma/ib_umem.h>
#include <rdma/ib_user_verbs.h>
#include "cxio_hal.h"
#include "iwch.h"
#include "iwch_provider.h"
#include "iwch_cm.h"
#include "iwch_user.h"
static int iwch_modify_port(struct ib_device *ibdev,
u8 port, int port_modify_mask,
struct ib_port_modify *props)
{
return -ENOSYS;
}
static struct ib_ah *iwch_ah_create(struct ib_pd *pd,
struct ib_ah_attr *ah_attr)
{
return ERR_PTR(-ENOSYS);
}
static int iwch_ah_destroy(struct ib_ah *ah)
{
return -ENOSYS;
}
static int iwch_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
{
return -ENOSYS;
}
static int iwch_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
{
return -ENOSYS;
}
static int iwch_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)
{
return -ENOSYS;
}
static int iwch_dealloc_ucontext(struct ib_ucontext *context)
{
struct iwch_dev *rhp = to_iwch_dev(context->device);
struct iwch_ucontext *ucontext = to_iwch_ucontext(context);
struct iwch_mm_entry *mm, *tmp;
PDBG("%s context %p\n", __FUNCTION__, context);
list_for_each_entry_safe(mm, tmp, &ucontext->mmaps, entry)
kfree(mm);
cxio_release_ucontext(&rhp->rdev, &ucontext->uctx);
kfree(ucontext);
return 0;
}
static struct ib_ucontext *iwch_alloc_ucontext(struct ib_device *ibdev,
struct ib_udata *udata)
{
struct iwch_ucontext *context;
struct iwch_dev *rhp = to_iwch_dev(ibdev);
PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
context = kzalloc(sizeof(*context), GFP_KERNEL);
if (!context)
return ERR_PTR(-ENOMEM);
cxio_init_ucontext(&rhp->rdev, &context->uctx);
INIT_LIST_HEAD(&context->mmaps);
spin_lock_init(&context->mmap_lock);
return &context->ibucontext;
}
static int iwch_destroy_cq(struct ib_cq *ib_cq)
{
struct iwch_cq *chp;
PDBG("%s ib_cq %p\n", __FUNCTION__, ib_cq);
chp = to_iwch_cq(ib_cq);
remove_handle(chp->rhp, &chp->rhp->cqidr, chp->cq.cqid);
atomic_dec(&chp->refcnt);
wait_event(chp->wait, !atomic_read(&chp->refcnt));
cxio_destroy_cq(&chp->rhp->rdev, &chp->cq);
kfree(chp);
return 0;
}
static struct ib_cq *iwch_create_cq(struct ib_device *ibdev, int entries, int vector,
struct ib_ucontext *ib_context,
struct ib_udata *udata)
{
struct iwch_dev *rhp;
struct iwch_cq *chp;
struct iwch_create_cq_resp uresp;
struct iwch_create_cq_req ureq;
struct iwch_ucontext *ucontext = NULL;
PDBG("%s ib_dev %p entries %d\n", __FUNCTION__, ibdev, entries);
rhp = to_iwch_dev(ibdev);
chp = kzalloc(sizeof(*chp), GFP_KERNEL);
if (!chp)
return ERR_PTR(-ENOMEM);
if (ib_context) {
ucontext = to_iwch_ucontext(ib_context);
if (!t3a_device(rhp)) {
if (ib_copy_from_udata(&ureq, udata, sizeof (ureq))) {
kfree(chp);
return ERR_PTR(-EFAULT);
}
chp->user_rptr_addr = (u32 __user *)(unsigned long)ureq.user_rptr_addr;
}
}
if (t3a_device(rhp)) {
/*
* T3A: Add some fluff to handle extra CQEs inserted
* for various errors.
* Additional CQE possibilities:
* TERMINATE,
* incoming RDMA WRITE Failures
* incoming RDMA READ REQUEST FAILUREs
* NOTE: We cannot ensure the CQ won't overflow.
*/
entries += 16;
}
entries = roundup_pow_of_two(entries);
chp->cq.size_log2 = ilog2(entries);
if (cxio_create_cq(&rhp->rdev, &chp->cq)) {
kfree(chp);
return ERR_PTR(-ENOMEM);
}
chp->rhp = rhp;
chp->ibcq.cqe = (1 << chp->cq.size_log2) - 1;
spin_lock_init(&chp->lock);
atomic_set(&chp->refcnt, 1);
init_waitqueue_head(&chp->wait);
insert_handle(rhp, &rhp->cqidr, chp, chp->cq.cqid);
if (ucontext) {
struct iwch_mm_entry *mm;
mm = kmalloc(sizeof *mm, GFP_KERNEL);
if (!mm) {
iwch_destroy_cq(&chp->ibcq);
return ERR_PTR(-ENOMEM);
}
uresp.cqid = chp->cq.cqid;
uresp.size_log2 = chp->cq.size_log2;
spin_lock(&ucontext->mmap_lock);
uresp.key = ucontext->key;
ucontext->key += PAGE_SIZE;
spin_unlock(&ucontext->mmap_lock);
if (ib_copy_to_udata(udata, &uresp, sizeof (uresp))) {
kfree(mm);
iwch_destroy_cq(&chp->ibcq);
return ERR_PTR(-EFAULT);
}
mm->key = uresp.key;
mm->addr = virt_to_phys(chp->cq.queue);
mm->len = PAGE_ALIGN((1UL << uresp.size_log2) *
sizeof (struct t3_cqe));
insert_mmap(ucontext, mm);
}
PDBG("created cqid 0x%0x chp %p size 0x%0x, dma_addr 0x%0llx\n",
chp->cq.cqid, chp, (1 << chp->cq.size_log2),
(unsigned long long) chp->cq.dma_addr);
return &chp->ibcq;
}
static int iwch_resize_cq(struct ib_cq *cq, int cqe, struct ib_udata *udata)
{
#ifdef notyet
struct iwch_cq *chp = to_iwch_cq(cq);
struct t3_cq oldcq, newcq;
int ret;
PDBG("%s ib_cq %p cqe %d\n", __FUNCTION__, cq, cqe);
/* We don't downsize... */
if (cqe <= cq->cqe)
return 0;
/* create new t3_cq with new size */
cqe = roundup_pow_of_two(cqe+1);
newcq.size_log2 = ilog2(cqe);
/* Dont allow resize to less than the current wce count */
if (cqe < Q_COUNT(chp->cq.rptr, chp->cq.wptr)) {
return -ENOMEM;
}
/* Quiesce all QPs using this CQ */
ret = iwch_quiesce_qps(chp);
if (ret) {
return ret;
}
ret = cxio_create_cq(&chp->rhp->rdev, &newcq);
if (ret) {
return ret;
}
/* copy CQEs */
memcpy(newcq.queue, chp->cq.queue, (1 << chp->cq.size_log2) *
sizeof(struct t3_cqe));
/* old iwch_qp gets new t3_cq but keeps old cqid */
oldcq = chp->cq;
chp->cq = newcq;
chp->cq.cqid = oldcq.cqid;
/* resize new t3_cq to update the HW context */
ret = cxio_resize_cq(&chp->rhp->rdev, &chp->cq);
if (ret) {
chp->cq = oldcq;
return ret;
}
chp->ibcq.cqe = (1<<chp->cq.size_log2) - 1;
/* destroy old t3_cq */
oldcq.cqid = newcq.cqid;
ret = cxio_destroy_cq(&chp->rhp->rdev, &oldcq);
if (ret) {
printk(KERN_ERR MOD "%s - cxio_destroy_cq failed %d\n",
__FUNCTION__, ret);
}
/* add user hooks here */
/* resume qps */
ret = iwch_resume_qps(chp);
return ret;
#else
return -ENOSYS;
#endif
}
static int iwch_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags)
{
struct iwch_dev *rhp;
struct iwch_cq *chp;
enum t3_cq_opcode cq_op;
int err;
unsigned long flag;
u32 rptr;
chp = to_iwch_cq(ibcq);
rhp = chp->rhp;
if ((flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED)
cq_op = CQ_ARM_SE;
else
cq_op = CQ_ARM_AN;
if (chp->user_rptr_addr) {
if (get_user(rptr, chp->user_rptr_addr))
return -EFAULT;
spin_lock_irqsave(&chp->lock, flag);
chp->cq.rptr = rptr;
} else
spin_lock_irqsave(&chp->lock, flag);
PDBG("%s rptr 0x%x\n", __FUNCTION__, chp->cq.rptr);
err = cxio_hal_cq_op(&rhp->rdev, &chp->cq, cq_op, 0);
spin_unlock_irqrestore(&chp->lock, flag);
if (err < 0)
printk(KERN_ERR MOD "Error %d rearming CQID 0x%x\n", err,
chp->cq.cqid);
if (err > 0 && !(flags & IB_CQ_REPORT_MISSED_EVENTS))
err = 0;
return err;
}
static int iwch_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
{
int len = vma->vm_end - vma->vm_start;
u32 key = vma->vm_pgoff << PAGE_SHIFT;
struct cxio_rdev *rdev_p;
int ret = 0;
struct iwch_mm_entry *mm;
struct iwch_ucontext *ucontext;
u64 addr;
PDBG("%s pgoff 0x%lx key 0x%x len %d\n", __FUNCTION__, vma->vm_pgoff,
key, len);
if (vma->vm_start & (PAGE_SIZE-1)) {
return -EINVAL;
}
rdev_p = &(to_iwch_dev(context->device)->rdev);
ucontext = to_iwch_ucontext(context);
mm = remove_mmap(ucontext, key, len);
if (!mm)
return -EINVAL;
addr = mm->addr;
kfree(mm);
if ((addr >= rdev_p->rnic_info.udbell_physbase) &&
(addr < (rdev_p->rnic_info.udbell_physbase +
rdev_p->rnic_info.udbell_len))) {
/*
* Map T3 DB register.
*/
if (vma->vm_flags & VM_READ) {
return -EPERM;
}
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND;
vma->vm_flags &= ~VM_MAYREAD;
ret = io_remap_pfn_range(vma, vma->vm_start,
addr >> PAGE_SHIFT,
len, vma->vm_page_prot);
} else {
/*
* Map WQ or CQ contig dma memory...
*/
ret = remap_pfn_range(vma, vma->vm_start,
addr >> PAGE_SHIFT,
len, vma->vm_page_prot);
}
return ret;
}
static int iwch_deallocate_pd(struct ib_pd *pd)
{
struct iwch_dev *rhp;
struct iwch_pd *php;
php = to_iwch_pd(pd);
rhp = php->rhp;
PDBG("%s ibpd %p pdid 0x%x\n", __FUNCTION__, pd, php->pdid);
cxio_hal_put_pdid(rhp->rdev.rscp, php->pdid);
kfree(php);
return 0;
}
static struct ib_pd *iwch_allocate_pd(struct ib_device *ibdev,
struct ib_ucontext *context,
struct ib_udata *udata)
{
struct iwch_pd *php;
u32 pdid;
struct iwch_dev *rhp;
PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
rhp = (struct iwch_dev *) ibdev;
pdid = cxio_hal_get_pdid(rhp->rdev.rscp);
if (!pdid)
return ERR_PTR(-EINVAL);
php = kzalloc(sizeof(*php), GFP_KERNEL);
if (!php) {
cxio_hal_put_pdid(rhp->rdev.rscp, pdid);
return ERR_PTR(-ENOMEM);
}
php->pdid = pdid;
php->rhp = rhp;
if (context) {
if (ib_copy_to_udata(udata, &php->pdid, sizeof (__u32))) {
iwch_deallocate_pd(&php->ibpd);
return ERR_PTR(-EFAULT);
}
}
PDBG("%s pdid 0x%0x ptr 0x%p\n", __FUNCTION__, pdid, php);
return &php->ibpd;
}
static int iwch_dereg_mr(struct ib_mr *ib_mr)
{
struct iwch_dev *rhp;
struct iwch_mr *mhp;
u32 mmid;
PDBG("%s ib_mr %p\n", __FUNCTION__, ib_mr);
/* There can be no memory windows */
if (atomic_read(&ib_mr->usecnt))
return -EINVAL;
mhp = to_iwch_mr(ib_mr);
rhp = mhp->rhp;
mmid = mhp->attr.stag >> 8;
cxio_dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size,
mhp->attr.pbl_addr);
remove_handle(rhp, &rhp->mmidr, mmid);
if (mhp->kva)
kfree((void *) (unsigned long) mhp->kva);
if (mhp->umem)
ib_umem_release(mhp->umem);
PDBG("%s mmid 0x%x ptr %p\n", __FUNCTION__, mmid, mhp);
kfree(mhp);
return 0;
}
static struct ib_mr *iwch_register_phys_mem(struct ib_pd *pd,
struct ib_phys_buf *buffer_list,
int num_phys_buf,
int acc,
u64 *iova_start)
{
__be64 *page_list;
int shift;
u64 total_size;
int npages;
struct iwch_dev *rhp;
struct iwch_pd *php;
struct iwch_mr *mhp;
int ret;
PDBG("%s ib_pd %p\n", __FUNCTION__, pd);
php = to_iwch_pd(pd);
rhp = php->rhp;
mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
if (!mhp)
return ERR_PTR(-ENOMEM);
/* First check that we have enough alignment */
if ((*iova_start & ~PAGE_MASK) != (buffer_list[0].addr & ~PAGE_MASK)) {
ret = -EINVAL;
goto err;
}
if (num_phys_buf > 1 &&
((buffer_list[0].addr + buffer_list[0].size) & ~PAGE_MASK)) {
ret = -EINVAL;
goto err;
}
ret = build_phys_page_list(buffer_list, num_phys_buf, iova_start,
&total_size, &npages, &shift, &page_list);
if (ret)
goto err;
mhp->rhp = rhp;
mhp->attr.pdid = php->pdid;
mhp->attr.zbva = 0;
mhp->attr.perms = iwch_ib_to_tpt_access(acc);
mhp->attr.va_fbo = *iova_start;
mhp->attr.page_size = shift - 12;
mhp->attr.len = (u32) total_size;
mhp->attr.pbl_size = npages;
ret = iwch_register_mem(rhp, php, mhp, shift, page_list);
kfree(page_list);
if (ret) {
goto err;
}
return &mhp->ibmr;
err:
kfree(mhp);
return ERR_PTR(ret);
}
static int iwch_reregister_phys_mem(struct ib_mr *mr,
int mr_rereg_mask,
struct ib_pd *pd,
struct ib_phys_buf *buffer_list,
int num_phys_buf,
int acc, u64 * iova_start)
{
struct iwch_mr mh, *mhp;
struct iwch_pd *php;
struct iwch_dev *rhp;
__be64 *page_list = NULL;
int shift = 0;
u64 total_size;
int npages;
int ret;
PDBG("%s ib_mr %p ib_pd %p\n", __FUNCTION__, mr, pd);
/* There can be no memory windows */
if (atomic_read(&mr->usecnt))
return -EINVAL;
mhp = to_iwch_mr(mr);
rhp = mhp->rhp;
php = to_iwch_pd(mr->pd);
/* make sure we are on the same adapter */
if (rhp != php->rhp)
return -EINVAL;
memcpy(&mh, mhp, sizeof *mhp);
if (mr_rereg_mask & IB_MR_REREG_PD)
php = to_iwch_pd(pd);
if (mr_rereg_mask & IB_MR_REREG_ACCESS)
mh.attr.perms = iwch_ib_to_tpt_access(acc);
if (mr_rereg_mask & IB_MR_REREG_TRANS) {
ret = build_phys_page_list(buffer_list, num_phys_buf,
iova_start,
&total_size, &npages,
&shift, &page_list);
if (ret)
return ret;
}
ret = iwch_reregister_mem(rhp, php, &mh, shift, page_list, npages);
kfree(page_list);
if (ret) {
return ret;
}
if (mr_rereg_mask & IB_MR_REREG_PD)
mhp->attr.pdid = php->pdid;
if (mr_rereg_mask & IB_MR_REREG_ACCESS)
mhp->attr.perms = iwch_ib_to_tpt_access(acc);
if (mr_rereg_mask & IB_MR_REREG_TRANS) {
mhp->attr.zbva = 0;
mhp->attr.va_fbo = *iova_start;
mhp->attr.page_size = shift - 12;
mhp->attr.len = (u32) total_size;
mhp->attr.pbl_size = npages;
}
return 0;
}
static struct ib_mr *iwch_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
u64 virt, int acc, struct ib_udata *udata)
{
__be64 *pages;
int shift, n, len;
int i, j, k;
int err = 0;
struct ib_umem_chunk *chunk;
struct iwch_dev *rhp;
struct iwch_pd *php;
struct iwch_mr *mhp;
struct iwch_reg_user_mr_resp uresp;
PDBG("%s ib_pd %p\n", __FUNCTION__, pd);
php = to_iwch_pd(pd);
rhp = php->rhp;
mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
if (!mhp)
return ERR_PTR(-ENOMEM);
mhp->umem = ib_umem_get(pd->uobject->context, start, length, acc);
if (IS_ERR(mhp->umem)) {
err = PTR_ERR(mhp->umem);
kfree(mhp);
return ERR_PTR(err);
}
shift = ffs(mhp->umem->page_size) - 1;
n = 0;
list_for_each_entry(chunk, &mhp->umem->chunk_list, list)
n += chunk->nents;
pages = kmalloc(n * sizeof(u64), GFP_KERNEL);
if (!pages) {
err = -ENOMEM;
goto err;
}
i = n = 0;
list_for_each_entry(chunk, &mhp->umem->chunk_list, list)
for (j = 0; j < chunk->nmap; ++j) {
len = sg_dma_len(&chunk->page_list[j]) >> shift;
for (k = 0; k < len; ++k) {
pages[i++] = cpu_to_be64(sg_dma_address(
&chunk->page_list[j]) +
mhp->umem->page_size * k);
}
}
mhp->rhp = rhp;
mhp->attr.pdid = php->pdid;
mhp->attr.zbva = 0;
mhp->attr.perms = iwch_ib_to_tpt_access(acc);
mhp->attr.va_fbo = virt;
mhp->attr.page_size = shift - 12;
mhp->attr.len = (u32) length;
mhp->attr.pbl_size = i;
err = iwch_register_mem(rhp, php, mhp, shift, pages);
kfree(pages);
if (err)
goto err;
if (udata && t3b_device(rhp)) {
uresp.pbl_addr = (mhp->attr.pbl_addr -
rhp->rdev.rnic_info.pbl_base) >> 3;
PDBG("%s user resp pbl_addr 0x%x\n", __FUNCTION__,
uresp.pbl_addr);
if (ib_copy_to_udata(udata, &uresp, sizeof (uresp))) {
iwch_dereg_mr(&mhp->ibmr);
err = -EFAULT;
goto err;
}
}
return &mhp->ibmr;
err:
ib_umem_release(mhp->umem);
kfree(mhp);
return ERR_PTR(err);
}
static struct ib_mr *iwch_get_dma_mr(struct ib_pd *pd, int acc)
{
struct ib_phys_buf bl;
u64 kva;
struct ib_mr *ibmr;
PDBG("%s ib_pd %p\n", __FUNCTION__, pd);
/*
* T3 only supports 32 bits of size.
*/
bl.size = 0xffffffff;
bl.addr = 0;
kva = 0;
ibmr = iwch_register_phys_mem(pd, &bl, 1, acc, &kva);
return ibmr;
}
static struct ib_mw *iwch_alloc_mw(struct ib_pd *pd)
{
struct iwch_dev *rhp;
struct iwch_pd *php;
struct iwch_mw *mhp;
u32 mmid;
u32 stag = 0;
int ret;
php = to_iwch_pd(pd);
rhp = php->rhp;
mhp = kzalloc(sizeof(*mhp), GFP_KERNEL);
if (!mhp)
return ERR_PTR(-ENOMEM);
ret = cxio_allocate_window(&rhp->rdev, &stag, php->pdid);
if (ret) {
kfree(mhp);
return ERR_PTR(ret);
}
mhp->rhp = rhp;
mhp->attr.pdid = php->pdid;
mhp->attr.type = TPT_MW;
mhp->attr.stag = stag;
mmid = (stag) >> 8;
insert_handle(rhp, &rhp->mmidr, mhp, mmid);
PDBG("%s mmid 0x%x mhp %p stag 0x%x\n", __FUNCTION__, mmid, mhp, stag);
return &(mhp->ibmw);
}
static int iwch_dealloc_mw(struct ib_mw *mw)
{
struct iwch_dev *rhp;
struct iwch_mw *mhp;
u32 mmid;
mhp = to_iwch_mw(mw);
rhp = mhp->rhp;
mmid = (mw->rkey) >> 8;
cxio_deallocate_window(&rhp->rdev, mhp->attr.stag);
remove_handle(rhp, &rhp->mmidr, mmid);
kfree(mhp);
PDBG("%s ib_mw %p mmid 0x%x ptr %p\n", __FUNCTION__, mw, mmid, mhp);
return 0;
}
static int iwch_destroy_qp(struct ib_qp *ib_qp)
{
struct iwch_dev *rhp;
struct iwch_qp *qhp;
struct iwch_qp_attributes attrs;
struct iwch_ucontext *ucontext;
qhp = to_iwch_qp(ib_qp);
rhp = qhp->rhp;
attrs.next_state = IWCH_QP_STATE_ERROR;
iwch_modify_qp(rhp, qhp, IWCH_QP_ATTR_NEXT_STATE, &attrs, 0);
wait_event(qhp->wait, !qhp->ep);
remove_handle(rhp, &rhp->qpidr, qhp->wq.qpid);
atomic_dec(&qhp->refcnt);
wait_event(qhp->wait, !atomic_read(&qhp->refcnt));
ucontext = ib_qp->uobject ? to_iwch_ucontext(ib_qp->uobject->context)
: NULL;
cxio_destroy_qp(&rhp->rdev, &qhp->wq,
ucontext ? &ucontext->uctx : &rhp->rdev.uctx);
PDBG("%s ib_qp %p qpid 0x%0x qhp %p\n", __FUNCTION__,
ib_qp, qhp->wq.qpid, qhp);
kfree(qhp);
return 0;
}
static struct ib_qp *iwch_create_qp(struct ib_pd *pd,
struct ib_qp_init_attr *attrs,
struct ib_udata *udata)
{
struct iwch_dev *rhp;
struct iwch_qp *qhp;
struct iwch_pd *php;
struct iwch_cq *schp;
struct iwch_cq *rchp;
struct iwch_create_qp_resp uresp;
int wqsize, sqsize, rqsize;
struct iwch_ucontext *ucontext;
PDBG("%s ib_pd %p\n", __FUNCTION__, pd);
if (attrs->qp_type != IB_QPT_RC)
return ERR_PTR(-EINVAL);
php = to_iwch_pd(pd);
rhp = php->rhp;
schp = get_chp(rhp, ((struct iwch_cq *) attrs->send_cq)->cq.cqid);
rchp = get_chp(rhp, ((struct iwch_cq *) attrs->recv_cq)->cq.cqid);
if (!schp || !rchp)
return ERR_PTR(-EINVAL);
/* The RQT size must be # of entries + 1 rounded up to a power of two */
rqsize = roundup_pow_of_two(attrs->cap.max_recv_wr);
if (rqsize == attrs->cap.max_recv_wr)
rqsize = roundup_pow_of_two(attrs->cap.max_recv_wr+1);
/* T3 doesn't support RQT depth < 16 */
if (rqsize < 16)
rqsize = 16;
if (rqsize > T3_MAX_RQ_SIZE)
return ERR_PTR(-EINVAL);
if (attrs->cap.max_inline_data > T3_MAX_INLINE)
return ERR_PTR(-EINVAL);
/*
* NOTE: The SQ and total WQ sizes don't need to be
* a power of two. However, all the code assumes
* they are. EG: Q_FREECNT() and friends.
*/
sqsize = roundup_pow_of_two(attrs->cap.max_send_wr);
wqsize = roundup_pow_of_two(rqsize + sqsize);
PDBG("%s wqsize %d sqsize %d rqsize %d\n", __FUNCTION__,
wqsize, sqsize, rqsize);
qhp = kzalloc(sizeof(*qhp), GFP_KERNEL);
if (!qhp)
return ERR_PTR(-ENOMEM);
qhp->wq.size_log2 = ilog2(wqsize);
qhp->wq.rq_size_log2 = ilog2(rqsize);
qhp->wq.sq_size_log2 = ilog2(sqsize);
ucontext = pd->uobject ? to_iwch_ucontext(pd->uobject->context) : NULL;
if (cxio_create_qp(&rhp->rdev, !udata, &qhp->wq,
ucontext ? &ucontext->uctx : &rhp->rdev.uctx)) {
kfree(qhp);
return ERR_PTR(-ENOMEM);
}
attrs->cap.max_recv_wr = rqsize - 1;
attrs->cap.max_send_wr = sqsize;
qhp->rhp = rhp;
qhp->attr.pd = php->pdid;
qhp->attr.scq = ((struct iwch_cq *) attrs->send_cq)->cq.cqid;
qhp->attr.rcq = ((struct iwch_cq *) attrs->recv_cq)->cq.cqid;
qhp->attr.sq_num_entries = attrs->cap.max_send_wr;
qhp->attr.rq_num_entries = attrs->cap.max_recv_wr;
qhp->attr.sq_max_sges = attrs->cap.max_send_sge;
qhp->attr.sq_max_sges_rdma_write = attrs->cap.max_send_sge;
qhp->attr.rq_max_sges = attrs->cap.max_recv_sge;
qhp->attr.state = IWCH_QP_STATE_IDLE;
qhp->attr.next_state = IWCH_QP_STATE_IDLE;
/*
* XXX - These don't get passed in from the openib user
* at create time. The CM sets them via a QP modify.
* Need to fix... I think the CM should
*/
qhp->attr.enable_rdma_read = 1;
qhp->attr.enable_rdma_write = 1;
qhp->attr.enable_bind = 1;
qhp->attr.max_ord = 1;
qhp->attr.max_ird = 1;
spin_lock_init(&qhp->lock);
init_waitqueue_head(&qhp->wait);
atomic_set(&qhp->refcnt, 1);
insert_handle(rhp, &rhp->qpidr, qhp, qhp->wq.qpid);
if (udata) {
struct iwch_mm_entry *mm1, *mm2;
mm1 = kmalloc(sizeof *mm1, GFP_KERNEL);
if (!mm1) {
iwch_destroy_qp(&qhp->ibqp);
return ERR_PTR(-ENOMEM);
}
mm2 = kmalloc(sizeof *mm2, GFP_KERNEL);
if (!mm2) {
kfree(mm1);
iwch_destroy_qp(&qhp->ibqp);
return ERR_PTR(-ENOMEM);
}
uresp.qpid = qhp->wq.qpid;
uresp.size_log2 = qhp->wq.size_log2;
uresp.sq_size_log2 = qhp->wq.sq_size_log2;
uresp.rq_size_log2 = qhp->wq.rq_size_log2;
spin_lock(&ucontext->mmap_lock);
uresp.key = ucontext->key;
ucontext->key += PAGE_SIZE;
uresp.db_key = ucontext->key;
ucontext->key += PAGE_SIZE;
spin_unlock(&ucontext->mmap_lock);
if (ib_copy_to_udata(udata, &uresp, sizeof (uresp))) {
kfree(mm1);
kfree(mm2);
iwch_destroy_qp(&qhp->ibqp);
return ERR_PTR(-EFAULT);
}
mm1->key = uresp.key;
mm1->addr = virt_to_phys(qhp->wq.queue);
mm1->len = PAGE_ALIGN(wqsize * sizeof (union t3_wr));
insert_mmap(ucontext, mm1);
mm2->key = uresp.db_key;
mm2->addr = qhp->wq.udb & PAGE_MASK;
mm2->len = PAGE_SIZE;
insert_mmap(ucontext, mm2);
}
qhp->ibqp.qp_num = qhp->wq.qpid;
init_timer(&(qhp->timer));
PDBG("%s sq_num_entries %d, rq_num_entries %d "
"qpid 0x%0x qhp %p dma_addr 0x%llx size %d\n",
__FUNCTION__, qhp->attr.sq_num_entries, qhp->attr.rq_num_entries,
qhp->wq.qpid, qhp, (unsigned long long) qhp->wq.dma_addr,
1 << qhp->wq.size_log2);
return &qhp->ibqp;
}
static int iwch_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int attr_mask, struct ib_udata *udata)
{
struct iwch_dev *rhp;
struct iwch_qp *qhp;
enum iwch_qp_attr_mask mask = 0;
struct iwch_qp_attributes attrs;
PDBG("%s ib_qp %p\n", __FUNCTION__, ibqp);
/* iwarp does not support the RTR state */
if ((attr_mask & IB_QP_STATE) && (attr->qp_state == IB_QPS_RTR))
attr_mask &= ~IB_QP_STATE;
/* Make sure we still have something left to do */
if (!attr_mask)
return 0;
memset(&attrs, 0, sizeof attrs);
qhp = to_iwch_qp(ibqp);
rhp = qhp->rhp;
attrs.next_state = iwch_convert_state(attr->qp_state);
attrs.enable_rdma_read = (attr->qp_access_flags &
IB_ACCESS_REMOTE_READ) ? 1 : 0;
attrs.enable_rdma_write = (attr->qp_access_flags &
IB_ACCESS_REMOTE_WRITE) ? 1 : 0;
attrs.enable_bind = (attr->qp_access_flags & IB_ACCESS_MW_BIND) ? 1 : 0;
mask |= (attr_mask & IB_QP_STATE) ? IWCH_QP_ATTR_NEXT_STATE : 0;
mask |= (attr_mask & IB_QP_ACCESS_FLAGS) ?
(IWCH_QP_ATTR_ENABLE_RDMA_READ |
IWCH_QP_ATTR_ENABLE_RDMA_WRITE |
IWCH_QP_ATTR_ENABLE_RDMA_BIND) : 0;
return iwch_modify_qp(rhp, qhp, mask, &attrs, 0);
}
void iwch_qp_add_ref(struct ib_qp *qp)
{
PDBG("%s ib_qp %p\n", __FUNCTION__, qp);
atomic_inc(&(to_iwch_qp(qp)->refcnt));
}
void iwch_qp_rem_ref(struct ib_qp *qp)
{
PDBG("%s ib_qp %p\n", __FUNCTION__, qp);
if (atomic_dec_and_test(&(to_iwch_qp(qp)->refcnt)))
wake_up(&(to_iwch_qp(qp)->wait));
}
static struct ib_qp *iwch_get_qp(struct ib_device *dev, int qpn)
{
PDBG("%s ib_dev %p qpn 0x%x\n", __FUNCTION__, dev, qpn);
return (struct ib_qp *)get_qhp(to_iwch_dev(dev), qpn);
}
static int iwch_query_pkey(struct ib_device *ibdev,
u8 port, u16 index, u16 * pkey)
{
PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
*pkey = 0;
return 0;
}
static int iwch_query_gid(struct ib_device *ibdev, u8 port,
int index, union ib_gid *gid)
{
struct iwch_dev *dev;
PDBG("%s ibdev %p, port %d, index %d, gid %p\n",
__FUNCTION__, ibdev, port, index, gid);
dev = to_iwch_dev(ibdev);
BUG_ON(port == 0 || port > 2);
memset(&(gid->raw[0]), 0, sizeof(gid->raw));
memcpy(&(gid->raw[0]), dev->rdev.port_info.lldevs[port-1]->dev_addr, 6);
return 0;
}
static int iwch_query_device(struct ib_device *ibdev,
struct ib_device_attr *props)
{
struct iwch_dev *dev;
PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
dev = to_iwch_dev(ibdev);
memset(props, 0, sizeof *props);
memcpy(&props->sys_image_guid, dev->rdev.t3cdev_p->lldev->dev_addr, 6);
props->device_cap_flags = dev->device_cap_flags;
props->vendor_id = (u32)dev->rdev.rnic_info.pdev->vendor;
props->vendor_part_id = (u32)dev->rdev.rnic_info.pdev->device;
props->max_mr_size = ~0ull;
props->max_qp = dev->attr.max_qps;
props->max_qp_wr = dev->attr.max_wrs;
props->max_sge = dev->attr.max_sge_per_wr;
props->max_sge_rd = 1;
props->max_qp_rd_atom = dev->attr.max_rdma_reads_per_qp;
props->max_cq = dev->attr.max_cqs;
props->max_cqe = dev->attr.max_cqes_per_cq;
props->max_mr = dev->attr.max_mem_regs;
props->max_pd = dev->attr.max_pds;
props->local_ca_ack_delay = 0;
return 0;
}
static int iwch_query_port(struct ib_device *ibdev,
u8 port, struct ib_port_attr *props)
{
PDBG("%s ibdev %p\n", __FUNCTION__, ibdev);
props->max_mtu = IB_MTU_4096;
props->lid = 0;
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_SNMP_TUNNEL_SUP |
IB_PORT_REINIT_SUP |
IB_PORT_DEVICE_MGMT_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 = 2;
props->active_speed = 2;
props->max_msg_sz = -1;
return 0;
}
static ssize_t show_rev(struct class_device *cdev, char *buf)
{
struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
ibdev.class_dev);
PDBG("%s class dev 0x%p\n", __FUNCTION__, cdev);
return sprintf(buf, "%d\n", dev->rdev.t3cdev_p->type);
}
static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
{
struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
ibdev.class_dev);
struct ethtool_drvinfo info;
struct net_device *lldev = dev->rdev.t3cdev_p->lldev;
PDBG("%s class dev 0x%p\n", __FUNCTION__, cdev);
lldev->ethtool_ops->get_drvinfo(lldev, &info);
return sprintf(buf, "%s\n", info.fw_version);
}
static ssize_t show_hca(struct class_device *cdev, char *buf)
{
struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
ibdev.class_dev);
struct ethtool_drvinfo info;
struct net_device *lldev = dev->rdev.t3cdev_p->lldev;
PDBG("%s class dev 0x%p\n", __FUNCTION__, cdev);
lldev->ethtool_ops->get_drvinfo(lldev, &info);
return sprintf(buf, "%s\n", info.driver);
}
static ssize_t show_board(struct class_device *cdev, char *buf)
{
struct iwch_dev *dev = container_of(cdev, struct iwch_dev,
ibdev.class_dev);
PDBG("%s class dev 0x%p\n", __FUNCTION__, dev);
return sprintf(buf, "%x.%x\n", dev->rdev.rnic_info.pdev->vendor,
dev->rdev.rnic_info.pdev->device);
}
static CLASS_DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
static CLASS_DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca, NULL);
static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board, NULL);
static struct class_device_attribute *iwch_class_attributes[] = {
&class_device_attr_hw_rev,
&class_device_attr_fw_ver,
&class_device_attr_hca_type,
&class_device_attr_board_id
};
int iwch_register_device(struct iwch_dev *dev)
{
int ret;
int i;
PDBG("%s iwch_dev %p\n", __FUNCTION__, dev);
strlcpy(dev->ibdev.name, "cxgb3_%d", IB_DEVICE_NAME_MAX);
memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
memcpy(&dev->ibdev.node_guid, dev->rdev.t3cdev_p->lldev->dev_addr, 6);
dev->ibdev.owner = THIS_MODULE;
dev->device_cap_flags =
(IB_DEVICE_ZERO_STAG |
IB_DEVICE_SEND_W_INV | IB_DEVICE_MEM_WINDOW);
dev->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_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_POST_SEND) |
(1ull << IB_USER_VERBS_CMD_POST_RECV);
dev->ibdev.node_type = RDMA_NODE_RNIC;
memcpy(dev->ibdev.node_desc, IWCH_NODE_DESC, sizeof(IWCH_NODE_DESC));
dev->ibdev.phys_port_cnt = dev->rdev.port_info.nports;
dev->ibdev.num_comp_vectors = 1;
dev->ibdev.dma_device = &(dev->rdev.rnic_info.pdev->dev);
dev->ibdev.query_device = iwch_query_device;
dev->ibdev.query_port = iwch_query_port;
dev->ibdev.modify_port = iwch_modify_port;
dev->ibdev.query_pkey = iwch_query_pkey;
dev->ibdev.query_gid = iwch_query_gid;
dev->ibdev.alloc_ucontext = iwch_alloc_ucontext;
dev->ibdev.dealloc_ucontext = iwch_dealloc_ucontext;
dev->ibdev.mmap = iwch_mmap;
dev->ibdev.alloc_pd = iwch_allocate_pd;
dev->ibdev.dealloc_pd = iwch_deallocate_pd;
dev->ibdev.create_ah = iwch_ah_create;
dev->ibdev.destroy_ah = iwch_ah_destroy;
dev->ibdev.create_qp = iwch_create_qp;
dev->ibdev.modify_qp = iwch_ib_modify_qp;
dev->ibdev.destroy_qp = iwch_destroy_qp;
dev->ibdev.create_cq = iwch_create_cq;
dev->ibdev.destroy_cq = iwch_destroy_cq;
dev->ibdev.resize_cq = iwch_resize_cq;
dev->ibdev.poll_cq = iwch_poll_cq;
dev->ibdev.get_dma_mr = iwch_get_dma_mr;
dev->ibdev.reg_phys_mr = iwch_register_phys_mem;
dev->ibdev.rereg_phys_mr = iwch_reregister_phys_mem;
dev->ibdev.reg_user_mr = iwch_reg_user_mr;
dev->ibdev.dereg_mr = iwch_dereg_mr;
dev->ibdev.alloc_mw = iwch_alloc_mw;
dev->ibdev.bind_mw = iwch_bind_mw;
dev->ibdev.dealloc_mw = iwch_dealloc_mw;
dev->ibdev.attach_mcast = iwch_multicast_attach;
dev->ibdev.detach_mcast = iwch_multicast_detach;
dev->ibdev.process_mad = iwch_process_mad;
dev->ibdev.req_notify_cq = iwch_arm_cq;
dev->ibdev.post_send = iwch_post_send;
dev->ibdev.post_recv = iwch_post_receive;
dev->ibdev.iwcm = kmalloc(sizeof(struct iw_cm_verbs), GFP_KERNEL);
if (!dev->ibdev.iwcm)
return -ENOMEM;
dev->ibdev.iwcm->connect = iwch_connect;
dev->ibdev.iwcm->accept = iwch_accept_cr;
dev->ibdev.iwcm->reject = iwch_reject_cr;
dev->ibdev.iwcm->create_listen = iwch_create_listen;
dev->ibdev.iwcm->destroy_listen = iwch_destroy_listen;
dev->ibdev.iwcm->add_ref = iwch_qp_add_ref;
dev->ibdev.iwcm->rem_ref = iwch_qp_rem_ref;
dev->ibdev.iwcm->get_qp = iwch_get_qp;
ret = ib_register_device(&dev->ibdev);
if (ret)
goto bail1;
for (i = 0; i < ARRAY_SIZE(iwch_class_attributes); ++i) {
ret = class_device_create_file(&dev->ibdev.class_dev,
iwch_class_attributes[i]);
if (ret) {
goto bail2;
}
}
return 0;
bail2:
ib_unregister_device(&dev->ibdev);
bail1:
return ret;
}
void iwch_unregister_device(struct iwch_dev *dev)
{
int i;
PDBG("%s iwch_dev %p\n", __FUNCTION__, dev);
for (i = 0; i < ARRAY_SIZE(iwch_class_attributes); ++i)
class_device_remove_file(&dev->ibdev.class_dev,
iwch_class_attributes[i]);
ib_unregister_device(&dev->ibdev);
return;
}
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