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linux/drivers/infiniband/hw/cxgb3/cxio_hal.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

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/*
* Copyright (c) 2006 Chelsio, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <asm/delay.h>
#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <net/net_namespace.h>
#include "cxio_resource.h"
#include "cxio_hal.h"
#include "cxgb3_offload.h"
#include "sge_defs.h"
static LIST_HEAD(rdev_list);
static cxio_hal_ev_callback_func_t cxio_ev_cb = NULL;
static struct cxio_rdev *cxio_hal_find_rdev_by_name(char *dev_name)
{
struct cxio_rdev *rdev;
list_for_each_entry(rdev, &rdev_list, entry)
if (!strcmp(rdev->dev_name, dev_name))
return rdev;
return NULL;
}
static struct cxio_rdev *cxio_hal_find_rdev_by_t3cdev(struct t3cdev *tdev)
{
struct cxio_rdev *rdev;
list_for_each_entry(rdev, &rdev_list, entry)
if (rdev->t3cdev_p == tdev)
return rdev;
return NULL;
}
int cxio_hal_cq_op(struct cxio_rdev *rdev_p, struct t3_cq *cq,
enum t3_cq_opcode op, u32 credit)
{
int ret;
struct t3_cqe *cqe;
u32 rptr;
struct rdma_cq_op setup;
setup.id = cq->cqid;
setup.credits = (op == CQ_CREDIT_UPDATE) ? credit : 0;
setup.op = op;
ret = rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_CQ_OP, &setup);
if ((ret < 0) || (op == CQ_CREDIT_UPDATE))
return ret;
/*
* If the rearm returned an index other than our current index,
* then there might be CQE's in flight (being DMA'd). We must wait
* here for them to complete or the consumer can miss a notification.
*/
if (Q_PTR2IDX((cq->rptr), cq->size_log2) != ret) {
int i=0;
rptr = cq->rptr;
/*
* Keep the generation correct by bumping rptr until it
* matches the index returned by the rearm - 1.
*/
while (Q_PTR2IDX((rptr+1), cq->size_log2) != ret)
rptr++;
/*
* Now rptr is the index for the (last) cqe that was
* in-flight at the time the HW rearmed the CQ. We
* spin until that CQE is valid.
*/
cqe = cq->queue + Q_PTR2IDX(rptr, cq->size_log2);
while (!CQ_VLD_ENTRY(rptr, cq->size_log2, cqe)) {
udelay(1);
if (i++ > 1000000) {
printk(KERN_ERR "%s: stalled rnic\n",
rdev_p->dev_name);
return -EIO;
}
}
return 1;
}
return 0;
}
static int cxio_hal_clear_cq_ctx(struct cxio_rdev *rdev_p, u32 cqid)
{
struct rdma_cq_setup setup;
setup.id = cqid;
setup.base_addr = 0; /* NULL address */
setup.size = 0; /* disaable the CQ */
setup.credits = 0;
setup.credit_thres = 0;
setup.ovfl_mode = 0;
return (rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_CQ_SETUP, &setup));
}
static int cxio_hal_clear_qp_ctx(struct cxio_rdev *rdev_p, u32 qpid)
{
u64 sge_cmd;
struct t3_modify_qp_wr *wqe;
struct sk_buff *skb = alloc_skb(sizeof(*wqe), GFP_KERNEL);
if (!skb) {
PDBG("%s alloc_skb failed\n", __func__);
return -ENOMEM;
}
wqe = (struct t3_modify_qp_wr *) skb_put(skb, sizeof(*wqe));
memset(wqe, 0, sizeof(*wqe));
build_fw_riwrh((struct fw_riwrh *) wqe, T3_WR_QP_MOD,
T3_COMPLETION_FLAG | T3_NOTIFY_FLAG, 0, qpid, 7,
T3_SOPEOP);
wqe->flags = cpu_to_be32(MODQP_WRITE_EC);
sge_cmd = qpid << 8 | 3;
wqe->sge_cmd = cpu_to_be64(sge_cmd);
skb->priority = CPL_PRIORITY_CONTROL;
return iwch_cxgb3_ofld_send(rdev_p->t3cdev_p, skb);
}
int cxio_create_cq(struct cxio_rdev *rdev_p, struct t3_cq *cq, int kernel)
{
struct rdma_cq_setup setup;
int size = (1UL << (cq->size_log2)) * sizeof(struct t3_cqe);
cq->cqid = cxio_hal_get_cqid(rdev_p->rscp);
if (!cq->cqid)
return -ENOMEM;
if (kernel) {
cq->sw_queue = kzalloc(size, GFP_KERNEL);
if (!cq->sw_queue)
return -ENOMEM;
}
cq->queue = dma_alloc_coherent(&(rdev_p->rnic_info.pdev->dev), size,
&(cq->dma_addr), GFP_KERNEL);
if (!cq->queue) {
kfree(cq->sw_queue);
return -ENOMEM;
}
pci_unmap_addr_set(cq, mapping, cq->dma_addr);
memset(cq->queue, 0, size);
setup.id = cq->cqid;
setup.base_addr = (u64) (cq->dma_addr);
setup.size = 1UL << cq->size_log2;
setup.credits = 65535;
setup.credit_thres = 1;
if (rdev_p->t3cdev_p->type != T3A)
setup.ovfl_mode = 0;
else
setup.ovfl_mode = 1;
return (rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_CQ_SETUP, &setup));
}
int cxio_resize_cq(struct cxio_rdev *rdev_p, struct t3_cq *cq)
{
struct rdma_cq_setup setup;
setup.id = cq->cqid;
setup.base_addr = (u64) (cq->dma_addr);
setup.size = 1UL << cq->size_log2;
setup.credits = setup.size;
setup.credit_thres = setup.size; /* TBD: overflow recovery */
setup.ovfl_mode = 1;
return (rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_CQ_SETUP, &setup));
}
static u32 get_qpid(struct cxio_rdev *rdev_p, struct cxio_ucontext *uctx)
{
struct cxio_qpid_list *entry;
u32 qpid;
int i;
mutex_lock(&uctx->lock);
if (!list_empty(&uctx->qpids)) {
entry = list_entry(uctx->qpids.next, struct cxio_qpid_list,
entry);
list_del(&entry->entry);
qpid = entry->qpid;
kfree(entry);
} else {
qpid = cxio_hal_get_qpid(rdev_p->rscp);
if (!qpid)
goto out;
for (i = qpid+1; i & rdev_p->qpmask; i++) {
entry = kmalloc(sizeof *entry, GFP_KERNEL);
if (!entry)
break;
entry->qpid = i;
list_add_tail(&entry->entry, &uctx->qpids);
}
}
out:
mutex_unlock(&uctx->lock);
PDBG("%s qpid 0x%x\n", __func__, qpid);
return qpid;
}
static void put_qpid(struct cxio_rdev *rdev_p, u32 qpid,
struct cxio_ucontext *uctx)
{
struct cxio_qpid_list *entry;
entry = kmalloc(sizeof *entry, GFP_KERNEL);
if (!entry)
return;
PDBG("%s qpid 0x%x\n", __func__, qpid);
entry->qpid = qpid;
mutex_lock(&uctx->lock);
list_add_tail(&entry->entry, &uctx->qpids);
mutex_unlock(&uctx->lock);
}
void cxio_release_ucontext(struct cxio_rdev *rdev_p, struct cxio_ucontext *uctx)
{
struct list_head *pos, *nxt;
struct cxio_qpid_list *entry;
mutex_lock(&uctx->lock);
list_for_each_safe(pos, nxt, &uctx->qpids) {
entry = list_entry(pos, struct cxio_qpid_list, entry);
list_del_init(&entry->entry);
if (!(entry->qpid & rdev_p->qpmask))
cxio_hal_put_qpid(rdev_p->rscp, entry->qpid);
kfree(entry);
}
mutex_unlock(&uctx->lock);
}
void cxio_init_ucontext(struct cxio_rdev *rdev_p, struct cxio_ucontext *uctx)
{
INIT_LIST_HEAD(&uctx->qpids);
mutex_init(&uctx->lock);
}
int cxio_create_qp(struct cxio_rdev *rdev_p, u32 kernel_domain,
struct t3_wq *wq, struct cxio_ucontext *uctx)
{
int depth = 1UL << wq->size_log2;
int rqsize = 1UL << wq->rq_size_log2;
wq->qpid = get_qpid(rdev_p, uctx);
if (!wq->qpid)
return -ENOMEM;
wq->rq = kzalloc(depth * sizeof(struct t3_swrq), GFP_KERNEL);
if (!wq->rq)
goto err1;
wq->rq_addr = cxio_hal_rqtpool_alloc(rdev_p, rqsize);
if (!wq->rq_addr)
goto err2;
wq->sq = kzalloc(depth * sizeof(struct t3_swsq), GFP_KERNEL);
if (!wq->sq)
goto err3;
wq->queue = dma_alloc_coherent(&(rdev_p->rnic_info.pdev->dev),
depth * sizeof(union t3_wr),
&(wq->dma_addr), GFP_KERNEL);
if (!wq->queue)
goto err4;
memset(wq->queue, 0, depth * sizeof(union t3_wr));
pci_unmap_addr_set(wq, mapping, wq->dma_addr);
wq->doorbell = (void __iomem *)rdev_p->rnic_info.kdb_addr;
if (!kernel_domain)
wq->udb = (u64)rdev_p->rnic_info.udbell_physbase +
(wq->qpid << rdev_p->qpshift);
wq->rdev = rdev_p;
PDBG("%s qpid 0x%x doorbell 0x%p udb 0x%llx\n", __func__,
wq->qpid, wq->doorbell, (unsigned long long) wq->udb);
return 0;
err4:
kfree(wq->sq);
err3:
cxio_hal_rqtpool_free(rdev_p, wq->rq_addr, rqsize);
err2:
kfree(wq->rq);
err1:
put_qpid(rdev_p, wq->qpid, uctx);
return -ENOMEM;
}
int cxio_destroy_cq(struct cxio_rdev *rdev_p, struct t3_cq *cq)
{
int err;
err = cxio_hal_clear_cq_ctx(rdev_p, cq->cqid);
kfree(cq->sw_queue);
dma_free_coherent(&(rdev_p->rnic_info.pdev->dev),
(1UL << (cq->size_log2))
* sizeof(struct t3_cqe), cq->queue,
pci_unmap_addr(cq, mapping));
cxio_hal_put_cqid(rdev_p->rscp, cq->cqid);
return err;
}
int cxio_destroy_qp(struct cxio_rdev *rdev_p, struct t3_wq *wq,
struct cxio_ucontext *uctx)
{
dma_free_coherent(&(rdev_p->rnic_info.pdev->dev),
(1UL << (wq->size_log2))
* sizeof(union t3_wr), wq->queue,
pci_unmap_addr(wq, mapping));
kfree(wq->sq);
cxio_hal_rqtpool_free(rdev_p, wq->rq_addr, (1UL << wq->rq_size_log2));
kfree(wq->rq);
put_qpid(rdev_p, wq->qpid, uctx);
return 0;
}
static void insert_recv_cqe(struct t3_wq *wq, struct t3_cq *cq)
{
struct t3_cqe cqe;
PDBG("%s wq %p cq %p sw_rptr 0x%x sw_wptr 0x%x\n", __func__,
wq, cq, cq->sw_rptr, cq->sw_wptr);
memset(&cqe, 0, sizeof(cqe));
cqe.header = cpu_to_be32(V_CQE_STATUS(TPT_ERR_SWFLUSH) |
V_CQE_OPCODE(T3_SEND) |
V_CQE_TYPE(0) |
V_CQE_SWCQE(1) |
V_CQE_QPID(wq->qpid) |
V_CQE_GENBIT(Q_GENBIT(cq->sw_wptr,
cq->size_log2)));
*(cq->sw_queue + Q_PTR2IDX(cq->sw_wptr, cq->size_log2)) = cqe;
cq->sw_wptr++;
}
int cxio_flush_rq(struct t3_wq *wq, struct t3_cq *cq, int count)
{
u32 ptr;
int flushed = 0;
PDBG("%s wq %p cq %p\n", __func__, wq, cq);
/* flush RQ */
PDBG("%s rq_rptr %u rq_wptr %u skip count %u\n", __func__,
wq->rq_rptr, wq->rq_wptr, count);
ptr = wq->rq_rptr + count;
while (ptr++ != wq->rq_wptr) {
insert_recv_cqe(wq, cq);
flushed++;
}
return flushed;
}
static void insert_sq_cqe(struct t3_wq *wq, struct t3_cq *cq,
struct t3_swsq *sqp)
{
struct t3_cqe cqe;
PDBG("%s wq %p cq %p sw_rptr 0x%x sw_wptr 0x%x\n", __func__,
wq, cq, cq->sw_rptr, cq->sw_wptr);
memset(&cqe, 0, sizeof(cqe));
cqe.header = cpu_to_be32(V_CQE_STATUS(TPT_ERR_SWFLUSH) |
V_CQE_OPCODE(sqp->opcode) |
V_CQE_TYPE(1) |
V_CQE_SWCQE(1) |
V_CQE_QPID(wq->qpid) |
V_CQE_GENBIT(Q_GENBIT(cq->sw_wptr,
cq->size_log2)));
cqe.u.scqe.wrid_hi = sqp->sq_wptr;
*(cq->sw_queue + Q_PTR2IDX(cq->sw_wptr, cq->size_log2)) = cqe;
cq->sw_wptr++;
}
int cxio_flush_sq(struct t3_wq *wq, struct t3_cq *cq, int count)
{
__u32 ptr;
int flushed = 0;
struct t3_swsq *sqp = wq->sq + Q_PTR2IDX(wq->sq_rptr, wq->sq_size_log2);
ptr = wq->sq_rptr + count;
sqp = wq->sq + Q_PTR2IDX(ptr, wq->sq_size_log2);
while (ptr != wq->sq_wptr) {
sqp->signaled = 0;
insert_sq_cqe(wq, cq, sqp);
ptr++;
sqp = wq->sq + Q_PTR2IDX(ptr, wq->sq_size_log2);
flushed++;
}
return flushed;
}
/*
* Move all CQEs from the HWCQ into the SWCQ.
*/
void cxio_flush_hw_cq(struct t3_cq *cq)
{
struct t3_cqe *cqe, *swcqe;
PDBG("%s cq %p cqid 0x%x\n", __func__, cq, cq->cqid);
cqe = cxio_next_hw_cqe(cq);
while (cqe) {
PDBG("%s flushing hwcq rptr 0x%x to swcq wptr 0x%x\n",
__func__, cq->rptr, cq->sw_wptr);
swcqe = cq->sw_queue + Q_PTR2IDX(cq->sw_wptr, cq->size_log2);
*swcqe = *cqe;
swcqe->header |= cpu_to_be32(V_CQE_SWCQE(1));
cq->sw_wptr++;
cq->rptr++;
cqe = cxio_next_hw_cqe(cq);
}
}
static int cqe_completes_wr(struct t3_cqe *cqe, struct t3_wq *wq)
{
if (CQE_OPCODE(*cqe) == T3_TERMINATE)
return 0;
if ((CQE_OPCODE(*cqe) == T3_RDMA_WRITE) && RQ_TYPE(*cqe))
return 0;
if ((CQE_OPCODE(*cqe) == T3_READ_RESP) && SQ_TYPE(*cqe))
return 0;
if (CQE_SEND_OPCODE(*cqe) && RQ_TYPE(*cqe) &&
Q_EMPTY(wq->rq_rptr, wq->rq_wptr))
return 0;
return 1;
}
void cxio_count_scqes(struct t3_cq *cq, struct t3_wq *wq, int *count)
{
struct t3_cqe *cqe;
u32 ptr;
*count = 0;
ptr = cq->sw_rptr;
while (!Q_EMPTY(ptr, cq->sw_wptr)) {
cqe = cq->sw_queue + (Q_PTR2IDX(ptr, cq->size_log2));
if ((SQ_TYPE(*cqe) ||
((CQE_OPCODE(*cqe) == T3_READ_RESP) && wq->oldest_read)) &&
(CQE_QPID(*cqe) == wq->qpid))
(*count)++;
ptr++;
}
PDBG("%s cq %p count %d\n", __func__, cq, *count);
}
void cxio_count_rcqes(struct t3_cq *cq, struct t3_wq *wq, int *count)
{
struct t3_cqe *cqe;
u32 ptr;
*count = 0;
PDBG("%s count zero %d\n", __func__, *count);
ptr = cq->sw_rptr;
while (!Q_EMPTY(ptr, cq->sw_wptr)) {
cqe = cq->sw_queue + (Q_PTR2IDX(ptr, cq->size_log2));
if (RQ_TYPE(*cqe) && (CQE_OPCODE(*cqe) != T3_READ_RESP) &&
(CQE_QPID(*cqe) == wq->qpid) && cqe_completes_wr(cqe, wq))
(*count)++;
ptr++;
}
PDBG("%s cq %p count %d\n", __func__, cq, *count);
}
static int cxio_hal_init_ctrl_cq(struct cxio_rdev *rdev_p)
{
struct rdma_cq_setup setup;
setup.id = 0;
setup.base_addr = 0; /* NULL address */
setup.size = 1; /* enable the CQ */
setup.credits = 0;
/* force SGE to redirect to RspQ and interrupt */
setup.credit_thres = 0;
setup.ovfl_mode = 1;
return (rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_CQ_SETUP, &setup));
}
static int cxio_hal_init_ctrl_qp(struct cxio_rdev *rdev_p)
{
int err;
u64 sge_cmd, ctx0, ctx1;
u64 base_addr;
struct t3_modify_qp_wr *wqe;
struct sk_buff *skb;
skb = alloc_skb(sizeof(*wqe), GFP_KERNEL);
if (!skb) {
PDBG("%s alloc_skb failed\n", __func__);
return -ENOMEM;
}
err = cxio_hal_init_ctrl_cq(rdev_p);
if (err) {
PDBG("%s err %d initializing ctrl_cq\n", __func__, err);
goto err;
}
rdev_p->ctrl_qp.workq = dma_alloc_coherent(
&(rdev_p->rnic_info.pdev->dev),
(1 << T3_CTRL_QP_SIZE_LOG2) *
sizeof(union t3_wr),
&(rdev_p->ctrl_qp.dma_addr),
GFP_KERNEL);
if (!rdev_p->ctrl_qp.workq) {
PDBG("%s dma_alloc_coherent failed\n", __func__);
err = -ENOMEM;
goto err;
}
pci_unmap_addr_set(&rdev_p->ctrl_qp, mapping,
rdev_p->ctrl_qp.dma_addr);
rdev_p->ctrl_qp.doorbell = (void __iomem *)rdev_p->rnic_info.kdb_addr;
memset(rdev_p->ctrl_qp.workq, 0,
(1 << T3_CTRL_QP_SIZE_LOG2) * sizeof(union t3_wr));
mutex_init(&rdev_p->ctrl_qp.lock);
init_waitqueue_head(&rdev_p->ctrl_qp.waitq);
/* update HW Ctrl QP context */
base_addr = rdev_p->ctrl_qp.dma_addr;
base_addr >>= 12;
ctx0 = (V_EC_SIZE((1 << T3_CTRL_QP_SIZE_LOG2)) |
V_EC_BASE_LO((u32) base_addr & 0xffff));
ctx0 <<= 32;
ctx0 |= V_EC_CREDITS(FW_WR_NUM);
base_addr >>= 16;
ctx1 = (u32) base_addr;
base_addr >>= 32;
ctx1 |= ((u64) (V_EC_BASE_HI((u32) base_addr & 0xf) | V_EC_RESPQ(0) |
V_EC_TYPE(0) | V_EC_GEN(1) |
V_EC_UP_TOKEN(T3_CTL_QP_TID) | F_EC_VALID)) << 32;
wqe = (struct t3_modify_qp_wr *) skb_put(skb, sizeof(*wqe));
memset(wqe, 0, sizeof(*wqe));
build_fw_riwrh((struct fw_riwrh *) wqe, T3_WR_QP_MOD, 0, 0,
T3_CTL_QP_TID, 7, T3_SOPEOP);
wqe->flags = cpu_to_be32(MODQP_WRITE_EC);
sge_cmd = (3ULL << 56) | FW_RI_SGEEC_START << 8 | 3;
wqe->sge_cmd = cpu_to_be64(sge_cmd);
wqe->ctx1 = cpu_to_be64(ctx1);
wqe->ctx0 = cpu_to_be64(ctx0);
PDBG("CtrlQP dma_addr 0x%llx workq %p size %d\n",
(unsigned long long) rdev_p->ctrl_qp.dma_addr,
rdev_p->ctrl_qp.workq, 1 << T3_CTRL_QP_SIZE_LOG2);
skb->priority = CPL_PRIORITY_CONTROL;
return iwch_cxgb3_ofld_send(rdev_p->t3cdev_p, skb);
err:
kfree_skb(skb);
return err;
}
static int cxio_hal_destroy_ctrl_qp(struct cxio_rdev *rdev_p)
{
dma_free_coherent(&(rdev_p->rnic_info.pdev->dev),
(1UL << T3_CTRL_QP_SIZE_LOG2)
* sizeof(union t3_wr), rdev_p->ctrl_qp.workq,
pci_unmap_addr(&rdev_p->ctrl_qp, mapping));
return cxio_hal_clear_qp_ctx(rdev_p, T3_CTRL_QP_ID);
}
/* write len bytes of data into addr (32B aligned address)
* If data is NULL, clear len byte of memory to zero.
* caller acquires the ctrl_qp lock before the call
*/
static int cxio_hal_ctrl_qp_write_mem(struct cxio_rdev *rdev_p, u32 addr,
u32 len, void *data)
{
u32 i, nr_wqe, copy_len;
u8 *copy_data;
u8 wr_len, utx_len; /* length in 8 byte flit */
enum t3_wr_flags flag;
__be64 *wqe;
u64 utx_cmd;
addr &= 0x7FFFFFF;
nr_wqe = len % 96 ? len / 96 + 1 : len / 96; /* 96B max per WQE */
PDBG("%s wptr 0x%x rptr 0x%x len %d, nr_wqe %d data %p addr 0x%0x\n",
__func__, rdev_p->ctrl_qp.wptr, rdev_p->ctrl_qp.rptr, len,
nr_wqe, data, addr);
utx_len = 3; /* in 32B unit */
for (i = 0; i < nr_wqe; i++) {
if (Q_FULL(rdev_p->ctrl_qp.rptr, rdev_p->ctrl_qp.wptr,
T3_CTRL_QP_SIZE_LOG2)) {
PDBG("%s ctrl_qp full wtpr 0x%0x rptr 0x%0x, "
"wait for more space i %d\n", __func__,
rdev_p->ctrl_qp.wptr, rdev_p->ctrl_qp.rptr, i);
if (wait_event_interruptible(rdev_p->ctrl_qp.waitq,
!Q_FULL(rdev_p->ctrl_qp.rptr,
rdev_p->ctrl_qp.wptr,
T3_CTRL_QP_SIZE_LOG2))) {
PDBG("%s ctrl_qp workq interrupted\n",
__func__);
return -ERESTARTSYS;
}
PDBG("%s ctrl_qp wakeup, continue posting work request "
"i %d\n", __func__, i);
}
wqe = (__be64 *)(rdev_p->ctrl_qp.workq + (rdev_p->ctrl_qp.wptr %
(1 << T3_CTRL_QP_SIZE_LOG2)));
flag = 0;
if (i == (nr_wqe - 1)) {
/* last WQE */
flag = T3_COMPLETION_FLAG;
if (len % 32)
utx_len = len / 32 + 1;
else
utx_len = len / 32;
}
/*
* Force a CQE to return the credit to the workq in case
* we posted more than half the max QP size of WRs
*/
if ((i != 0) &&
(i % (((1 << T3_CTRL_QP_SIZE_LOG2)) >> 1) == 0)) {
flag = T3_COMPLETION_FLAG;
PDBG("%s force completion at i %d\n", __func__, i);
}
/* build the utx mem command */
wqe += (sizeof(struct t3_bypass_wr) >> 3);
utx_cmd = (T3_UTX_MEM_WRITE << 28) | (addr + i * 3);
utx_cmd <<= 32;
utx_cmd |= (utx_len << 28) | ((utx_len << 2) + 1);
*wqe = cpu_to_be64(utx_cmd);
wqe++;
copy_data = (u8 *) data + i * 96;
copy_len = len > 96 ? 96 : len;
/* clear memory content if data is NULL */
if (data)
memcpy(wqe, copy_data, copy_len);
else
memset(wqe, 0, copy_len);
if (copy_len % 32)
memset(((u8 *) wqe) + copy_len, 0,
32 - (copy_len % 32));
wr_len = ((sizeof(struct t3_bypass_wr)) >> 3) + 1 +
(utx_len << 2);
wqe = (__be64 *)(rdev_p->ctrl_qp.workq + (rdev_p->ctrl_qp.wptr %
(1 << T3_CTRL_QP_SIZE_LOG2)));
/* wptr in the WRID[31:0] */
((union t3_wrid *)(wqe+1))->id0.low = rdev_p->ctrl_qp.wptr;
/*
* This must be the last write with a memory barrier
* for the genbit
*/
build_fw_riwrh((struct fw_riwrh *) wqe, T3_WR_BP, flag,
Q_GENBIT(rdev_p->ctrl_qp.wptr,
T3_CTRL_QP_SIZE_LOG2), T3_CTRL_QP_ID,
wr_len, T3_SOPEOP);
if (flag == T3_COMPLETION_FLAG)
ring_doorbell(rdev_p->ctrl_qp.doorbell, T3_CTRL_QP_ID);
len -= 96;
rdev_p->ctrl_qp.wptr++;
}
return 0;
}
/* IN: stag key, pdid, perm, zbva, to, len, page_size, pbl_size and pbl_addr
* OUT: stag index
* TBD: shared memory region support
*/
static int __cxio_tpt_op(struct cxio_rdev *rdev_p, u32 reset_tpt_entry,
u32 *stag, u8 stag_state, u32 pdid,
enum tpt_mem_type type, enum tpt_mem_perm perm,
u32 zbva, u64 to, u32 len, u8 page_size,
u32 pbl_size, u32 pbl_addr)
{
int err;
struct tpt_entry tpt;
u32 stag_idx;
u32 wptr;
if (cxio_fatal_error(rdev_p))
return -EIO;
stag_state = stag_state > 0;
stag_idx = (*stag) >> 8;
if ((!reset_tpt_entry) && !(*stag != T3_STAG_UNSET)) {
stag_idx = cxio_hal_get_stag(rdev_p->rscp);
if (!stag_idx)
return -ENOMEM;
*stag = (stag_idx << 8) | ((*stag) & 0xFF);
}
PDBG("%s stag_state 0x%0x type 0x%0x pdid 0x%0x, stag_idx 0x%x\n",
__func__, stag_state, type, pdid, stag_idx);
mutex_lock(&rdev_p->ctrl_qp.lock);
/* write TPT entry */
if (reset_tpt_entry)
memset(&tpt, 0, sizeof(tpt));
else {
tpt.valid_stag_pdid = cpu_to_be32(F_TPT_VALID |
V_TPT_STAG_KEY((*stag) & M_TPT_STAG_KEY) |
V_TPT_STAG_STATE(stag_state) |
V_TPT_STAG_TYPE(type) | V_TPT_PDID(pdid));
BUG_ON(page_size >= 28);
tpt.flags_pagesize_qpid = cpu_to_be32(V_TPT_PERM(perm) |
((perm & TPT_MW_BIND) ? F_TPT_MW_BIND_ENABLE : 0) |
V_TPT_ADDR_TYPE((zbva ? TPT_ZBTO : TPT_VATO)) |
V_TPT_PAGE_SIZE(page_size));
tpt.rsvd_pbl_addr = reset_tpt_entry ? 0 :
cpu_to_be32(V_TPT_PBL_ADDR(PBL_OFF(rdev_p, pbl_addr)>>3));
tpt.len = cpu_to_be32(len);
tpt.va_hi = cpu_to_be32((u32) (to >> 32));
tpt.va_low_or_fbo = cpu_to_be32((u32) (to & 0xFFFFFFFFULL));
tpt.rsvd_bind_cnt_or_pstag = 0;
tpt.rsvd_pbl_size = reset_tpt_entry ? 0 :
cpu_to_be32(V_TPT_PBL_SIZE(pbl_size >> 2));
}
err = cxio_hal_ctrl_qp_write_mem(rdev_p,
stag_idx +
(rdev_p->rnic_info.tpt_base >> 5),
sizeof(tpt), &tpt);
/* release the stag index to free pool */
if (reset_tpt_entry)
cxio_hal_put_stag(rdev_p->rscp, stag_idx);
wptr = rdev_p->ctrl_qp.wptr;
mutex_unlock(&rdev_p->ctrl_qp.lock);
if (!err)
if (wait_event_interruptible(rdev_p->ctrl_qp.waitq,
SEQ32_GE(rdev_p->ctrl_qp.rptr,
wptr)))
return -ERESTARTSYS;
return err;
}
int cxio_write_pbl(struct cxio_rdev *rdev_p, __be64 *pbl,
u32 pbl_addr, u32 pbl_size)
{
u32 wptr;
int err;
PDBG("%s *pdb_addr 0x%x, pbl_base 0x%x, pbl_size %d\n",
__func__, pbl_addr, rdev_p->rnic_info.pbl_base,
pbl_size);
mutex_lock(&rdev_p->ctrl_qp.lock);
err = cxio_hal_ctrl_qp_write_mem(rdev_p, pbl_addr >> 5, pbl_size << 3,
pbl);
wptr = rdev_p->ctrl_qp.wptr;
mutex_unlock(&rdev_p->ctrl_qp.lock);
if (err)
return err;
if (wait_event_interruptible(rdev_p->ctrl_qp.waitq,
SEQ32_GE(rdev_p->ctrl_qp.rptr,
wptr)))
return -ERESTARTSYS;
return 0;
}
int cxio_register_phys_mem(struct cxio_rdev *rdev_p, u32 *stag, u32 pdid,
enum tpt_mem_perm perm, u32 zbva, u64 to, u32 len,
u8 page_size, u32 pbl_size, u32 pbl_addr)
{
*stag = T3_STAG_UNSET;
return __cxio_tpt_op(rdev_p, 0, stag, 1, pdid, TPT_NON_SHARED_MR, perm,
zbva, to, len, page_size, pbl_size, pbl_addr);
}
int cxio_reregister_phys_mem(struct cxio_rdev *rdev_p, u32 *stag, u32 pdid,
enum tpt_mem_perm perm, u32 zbva, u64 to, u32 len,
u8 page_size, u32 pbl_size, u32 pbl_addr)
{
return __cxio_tpt_op(rdev_p, 0, stag, 1, pdid, TPT_NON_SHARED_MR, perm,
zbva, to, len, page_size, pbl_size, pbl_addr);
}
int cxio_dereg_mem(struct cxio_rdev *rdev_p, u32 stag, u32 pbl_size,
u32 pbl_addr)
{
return __cxio_tpt_op(rdev_p, 1, &stag, 0, 0, 0, 0, 0, 0ULL, 0, 0,
pbl_size, pbl_addr);
}
int cxio_allocate_window(struct cxio_rdev *rdev_p, u32 * stag, u32 pdid)
{
*stag = T3_STAG_UNSET;
return __cxio_tpt_op(rdev_p, 0, stag, 0, pdid, TPT_MW, 0, 0, 0ULL, 0, 0,
0, 0);
}
int cxio_deallocate_window(struct cxio_rdev *rdev_p, u32 stag)
{
return __cxio_tpt_op(rdev_p, 1, &stag, 0, 0, 0, 0, 0, 0ULL, 0, 0,
0, 0);
}
int cxio_allocate_stag(struct cxio_rdev *rdev_p, u32 *stag, u32 pdid, u32 pbl_size, u32 pbl_addr)
{
*stag = T3_STAG_UNSET;
return __cxio_tpt_op(rdev_p, 0, stag, 0, pdid, TPT_NON_SHARED_MR,
0, 0, 0ULL, 0, 0, pbl_size, pbl_addr);
}
int cxio_rdma_init(struct cxio_rdev *rdev_p, struct t3_rdma_init_attr *attr)
{
struct t3_rdma_init_wr *wqe;
struct sk_buff *skb = alloc_skb(sizeof(*wqe), GFP_ATOMIC);
if (!skb)
return -ENOMEM;
PDBG("%s rdev_p %p\n", __func__, rdev_p);
wqe = (struct t3_rdma_init_wr *) __skb_put(skb, sizeof(*wqe));
wqe->wrh.op_seop_flags = cpu_to_be32(V_FW_RIWR_OP(T3_WR_INIT));
wqe->wrh.gen_tid_len = cpu_to_be32(V_FW_RIWR_TID(attr->tid) |
V_FW_RIWR_LEN(sizeof(*wqe) >> 3));
wqe->wrid.id1 = 0;
wqe->qpid = cpu_to_be32(attr->qpid);
wqe->pdid = cpu_to_be32(attr->pdid);
wqe->scqid = cpu_to_be32(attr->scqid);
wqe->rcqid = cpu_to_be32(attr->rcqid);
wqe->rq_addr = cpu_to_be32(attr->rq_addr - rdev_p->rnic_info.rqt_base);
wqe->rq_size = cpu_to_be32(attr->rq_size);
wqe->mpaattrs = attr->mpaattrs;
wqe->qpcaps = attr->qpcaps;
wqe->ulpdu_size = cpu_to_be16(attr->tcp_emss);
wqe->rqe_count = cpu_to_be16(attr->rqe_count);
wqe->flags_rtr_type = cpu_to_be16(attr->flags |
V_RTR_TYPE(attr->rtr_type) |
V_CHAN(attr->chan));
wqe->ord = cpu_to_be32(attr->ord);
wqe->ird = cpu_to_be32(attr->ird);
wqe->qp_dma_addr = cpu_to_be64(attr->qp_dma_addr);
wqe->qp_dma_size = cpu_to_be32(attr->qp_dma_size);
wqe->irs = cpu_to_be32(attr->irs);
skb->priority = 0; /* 0=>ToeQ; 1=>CtrlQ */
return iwch_cxgb3_ofld_send(rdev_p->t3cdev_p, skb);
}
void cxio_register_ev_cb(cxio_hal_ev_callback_func_t ev_cb)
{
cxio_ev_cb = ev_cb;
}
void cxio_unregister_ev_cb(cxio_hal_ev_callback_func_t ev_cb)
{
cxio_ev_cb = NULL;
}
static int cxio_hal_ev_handler(struct t3cdev *t3cdev_p, struct sk_buff *skb)
{
static int cnt;
struct cxio_rdev *rdev_p = NULL;
struct respQ_msg_t *rsp_msg = (struct respQ_msg_t *) skb->data;
PDBG("%d: %s cq_id 0x%x cq_ptr 0x%x genbit %0x overflow %0x an %0x"
" se %0x notify %0x cqbranch %0x creditth %0x\n",
cnt, __func__, RSPQ_CQID(rsp_msg), RSPQ_CQPTR(rsp_msg),
RSPQ_GENBIT(rsp_msg), RSPQ_OVERFLOW(rsp_msg), RSPQ_AN(rsp_msg),
RSPQ_SE(rsp_msg), RSPQ_NOTIFY(rsp_msg), RSPQ_CQBRANCH(rsp_msg),
RSPQ_CREDIT_THRESH(rsp_msg));
PDBG("CQE: QPID 0x%0x genbit %0x type 0x%0x status 0x%0x opcode %d "
"len 0x%0x wrid_hi_stag 0x%x wrid_low_msn 0x%x\n",
CQE_QPID(rsp_msg->cqe), CQE_GENBIT(rsp_msg->cqe),
CQE_TYPE(rsp_msg->cqe), CQE_STATUS(rsp_msg->cqe),
CQE_OPCODE(rsp_msg->cqe), CQE_LEN(rsp_msg->cqe),
CQE_WRID_HI(rsp_msg->cqe), CQE_WRID_LOW(rsp_msg->cqe));
rdev_p = (struct cxio_rdev *)t3cdev_p->ulp;
if (!rdev_p) {
PDBG("%s called by t3cdev %p with null ulp\n", __func__,
t3cdev_p);
return 0;
}
if (CQE_QPID(rsp_msg->cqe) == T3_CTRL_QP_ID) {
rdev_p->ctrl_qp.rptr = CQE_WRID_LOW(rsp_msg->cqe) + 1;
wake_up_interruptible(&rdev_p->ctrl_qp.waitq);
dev_kfree_skb_irq(skb);
} else if (CQE_QPID(rsp_msg->cqe) == 0xfff8)
dev_kfree_skb_irq(skb);
else if (cxio_ev_cb)
(*cxio_ev_cb) (rdev_p, skb);
else
dev_kfree_skb_irq(skb);
cnt++;
return 0;
}
/* Caller takes care of locking if needed */
int cxio_rdev_open(struct cxio_rdev *rdev_p)
{
struct net_device *netdev_p = NULL;
int err = 0;
if (strlen(rdev_p->dev_name)) {
if (cxio_hal_find_rdev_by_name(rdev_p->dev_name)) {
return -EBUSY;
}
netdev_p = dev_get_by_name(&init_net, rdev_p->dev_name);
if (!netdev_p) {
return -EINVAL;
}
dev_put(netdev_p);
} else if (rdev_p->t3cdev_p) {
if (cxio_hal_find_rdev_by_t3cdev(rdev_p->t3cdev_p)) {
return -EBUSY;
}
netdev_p = rdev_p->t3cdev_p->lldev;
strncpy(rdev_p->dev_name, rdev_p->t3cdev_p->name,
T3_MAX_DEV_NAME_LEN);
} else {
PDBG("%s t3cdev_p or dev_name must be set\n", __func__);
return -EINVAL;
}
list_add_tail(&rdev_p->entry, &rdev_list);
PDBG("%s opening rnic dev %s\n", __func__, rdev_p->dev_name);
memset(&rdev_p->ctrl_qp, 0, sizeof(rdev_p->ctrl_qp));
if (!rdev_p->t3cdev_p)
rdev_p->t3cdev_p = dev2t3cdev(netdev_p);
rdev_p->t3cdev_p->ulp = (void *) rdev_p;
err = rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, GET_EMBEDDED_INFO,
&(rdev_p->fw_info));
if (err) {
printk(KERN_ERR "%s t3cdev_p(%p)->ctl returned error %d.\n",
__func__, rdev_p->t3cdev_p, err);
goto err1;
}
if (G_FW_VERSION_MAJOR(rdev_p->fw_info.fw_vers) != CXIO_FW_MAJ) {
printk(KERN_ERR MOD "fatal firmware version mismatch: "
"need version %u but adapter has version %u\n",
CXIO_FW_MAJ,
G_FW_VERSION_MAJOR(rdev_p->fw_info.fw_vers));
err = -EINVAL;
goto err1;
}
err = rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, RDMA_GET_PARAMS,
&(rdev_p->rnic_info));
if (err) {
printk(KERN_ERR "%s t3cdev_p(%p)->ctl returned error %d.\n",
__func__, rdev_p->t3cdev_p, err);
goto err1;
}
err = rdev_p->t3cdev_p->ctl(rdev_p->t3cdev_p, GET_PORTS,
&(rdev_p->port_info));
if (err) {
printk(KERN_ERR "%s t3cdev_p(%p)->ctl returned error %d.\n",
__func__, rdev_p->t3cdev_p, err);
goto err1;
}
/*
* qpshift is the number of bits to shift the qpid left in order
* to get the correct address of the doorbell for that qp.
*/
cxio_init_ucontext(rdev_p, &rdev_p->uctx);
rdev_p->qpshift = PAGE_SHIFT -
ilog2(65536 >>
ilog2(rdev_p->rnic_info.udbell_len >>
PAGE_SHIFT));
rdev_p->qpnr = rdev_p->rnic_info.udbell_len >> PAGE_SHIFT;
rdev_p->qpmask = (65536 >> ilog2(rdev_p->qpnr)) - 1;
PDBG("%s rnic %s info: tpt_base 0x%0x tpt_top 0x%0x num stags %d "
"pbl_base 0x%0x pbl_top 0x%0x rqt_base 0x%0x, rqt_top 0x%0x\n",
__func__, rdev_p->dev_name, rdev_p->rnic_info.tpt_base,
rdev_p->rnic_info.tpt_top, cxio_num_stags(rdev_p),
rdev_p->rnic_info.pbl_base,
rdev_p->rnic_info.pbl_top, rdev_p->rnic_info.rqt_base,
rdev_p->rnic_info.rqt_top);
PDBG("udbell_len 0x%0x udbell_physbase 0x%lx kdb_addr %p qpshift %lu "
"qpnr %d qpmask 0x%x\n",
rdev_p->rnic_info.udbell_len,
rdev_p->rnic_info.udbell_physbase, rdev_p->rnic_info.kdb_addr,
rdev_p->qpshift, rdev_p->qpnr, rdev_p->qpmask);
err = cxio_hal_init_ctrl_qp(rdev_p);
if (err) {
printk(KERN_ERR "%s error %d initializing ctrl_qp.\n",
__func__, err);
goto err1;
}
err = cxio_hal_init_resource(rdev_p, cxio_num_stags(rdev_p), 0,
0, T3_MAX_NUM_QP, T3_MAX_NUM_CQ,
T3_MAX_NUM_PD);
if (err) {
printk(KERN_ERR "%s error %d initializing hal resources.\n",
__func__, err);
goto err2;
}
err = cxio_hal_pblpool_create(rdev_p);
if (err) {
printk(KERN_ERR "%s error %d initializing pbl mem pool.\n",
__func__, err);
goto err3;
}
err = cxio_hal_rqtpool_create(rdev_p);
if (err) {
printk(KERN_ERR "%s error %d initializing rqt mem pool.\n",
__func__, err);
goto err4;
}
return 0;
err4:
cxio_hal_pblpool_destroy(rdev_p);
err3:
cxio_hal_destroy_resource(rdev_p->rscp);
err2:
cxio_hal_destroy_ctrl_qp(rdev_p);
err1:
rdev_p->t3cdev_p->ulp = NULL;
list_del(&rdev_p->entry);
return err;
}
void cxio_rdev_close(struct cxio_rdev *rdev_p)
{
if (rdev_p) {
cxio_hal_pblpool_destroy(rdev_p);
cxio_hal_rqtpool_destroy(rdev_p);
list_del(&rdev_p->entry);
cxio_hal_destroy_ctrl_qp(rdev_p);
cxio_hal_destroy_resource(rdev_p->rscp);
rdev_p->t3cdev_p->ulp = NULL;
}
}
int __init cxio_hal_init(void)
{
if (cxio_hal_init_rhdl_resource(T3_MAX_NUM_RI))
return -ENOMEM;
t3_register_cpl_handler(CPL_ASYNC_NOTIF, cxio_hal_ev_handler);
return 0;
}
void __exit cxio_hal_exit(void)
{
struct cxio_rdev *rdev, *tmp;
t3_register_cpl_handler(CPL_ASYNC_NOTIF, NULL);
list_for_each_entry_safe(rdev, tmp, &rdev_list, entry)
cxio_rdev_close(rdev);
cxio_hal_destroy_rhdl_resource();
}
static void flush_completed_wrs(struct t3_wq *wq, struct t3_cq *cq)
{
struct t3_swsq *sqp;
__u32 ptr = wq->sq_rptr;
int count = Q_COUNT(wq->sq_rptr, wq->sq_wptr);
sqp = wq->sq + Q_PTR2IDX(ptr, wq->sq_size_log2);
while (count--)
if (!sqp->signaled) {
ptr++;
sqp = wq->sq + Q_PTR2IDX(ptr, wq->sq_size_log2);
} else if (sqp->complete) {
/*
* Insert this completed cqe into the swcq.
*/
PDBG("%s moving cqe into swcq sq idx %ld cq idx %ld\n",
__func__, Q_PTR2IDX(ptr, wq->sq_size_log2),
Q_PTR2IDX(cq->sw_wptr, cq->size_log2));
sqp->cqe.header |= htonl(V_CQE_SWCQE(1));
*(cq->sw_queue + Q_PTR2IDX(cq->sw_wptr, cq->size_log2))
= sqp->cqe;
cq->sw_wptr++;
sqp->signaled = 0;
break;
} else
break;
}
static void create_read_req_cqe(struct t3_wq *wq, struct t3_cqe *hw_cqe,
struct t3_cqe *read_cqe)
{
read_cqe->u.scqe.wrid_hi = wq->oldest_read->sq_wptr;
read_cqe->len = wq->oldest_read->read_len;
read_cqe->header = htonl(V_CQE_QPID(CQE_QPID(*hw_cqe)) |
V_CQE_SWCQE(SW_CQE(*hw_cqe)) |
V_CQE_OPCODE(T3_READ_REQ) |
V_CQE_TYPE(1));
}
/*
* Return a ptr to the next read wr in the SWSQ or NULL.
*/
static void advance_oldest_read(struct t3_wq *wq)
{
u32 rptr = wq->oldest_read - wq->sq + 1;
u32 wptr = Q_PTR2IDX(wq->sq_wptr, wq->sq_size_log2);
while (Q_PTR2IDX(rptr, wq->sq_size_log2) != wptr) {
wq->oldest_read = wq->sq + Q_PTR2IDX(rptr, wq->sq_size_log2);
if (wq->oldest_read->opcode == T3_READ_REQ)
return;
rptr++;
}
wq->oldest_read = NULL;
}
/*
* cxio_poll_cq
*
* Caller must:
* check the validity of the first CQE,
* supply the wq assicated with the qpid.
*
* credit: cq credit to return to sge.
* cqe_flushed: 1 iff the CQE is flushed.
* cqe: copy of the polled CQE.
*
* return value:
* 0 CQE returned,
* -1 CQE skipped, try again.
*/
int cxio_poll_cq(struct t3_wq *wq, struct t3_cq *cq, struct t3_cqe *cqe,
u8 *cqe_flushed, u64 *cookie, u32 *credit)
{
int ret = 0;
struct t3_cqe *hw_cqe, read_cqe;
*cqe_flushed = 0;
*credit = 0;
hw_cqe = cxio_next_cqe(cq);
PDBG("%s CQE OOO %d qpid 0x%0x genbit %d type %d status 0x%0x"
" opcode 0x%0x len 0x%0x wrid_hi_stag 0x%x wrid_low_msn 0x%x\n",
__func__, CQE_OOO(*hw_cqe), CQE_QPID(*hw_cqe),
CQE_GENBIT(*hw_cqe), CQE_TYPE(*hw_cqe), CQE_STATUS(*hw_cqe),
CQE_OPCODE(*hw_cqe), CQE_LEN(*hw_cqe), CQE_WRID_HI(*hw_cqe),
CQE_WRID_LOW(*hw_cqe));
/*
* skip cqe's not affiliated with a QP.
*/
if (wq == NULL) {
ret = -1;
goto skip_cqe;
}
/*
* Gotta tweak READ completions:
* 1) the cqe doesn't contain the sq_wptr from the wr.
* 2) opcode not reflected from the wr.
* 3) read_len not reflected from the wr.
* 4) cq_type is RQ_TYPE not SQ_TYPE.
*/
if (RQ_TYPE(*hw_cqe) && (CQE_OPCODE(*hw_cqe) == T3_READ_RESP)) {
/*
* If this is an unsolicited read response, then the read
* was generated by the kernel driver as part of peer-2-peer
* connection setup. So ignore the completion.
*/
if (!wq->oldest_read) {
if (CQE_STATUS(*hw_cqe))
wq->error = 1;
ret = -1;
goto skip_cqe;
}
/*
* Don't write to the HWCQ, so create a new read req CQE
* in local memory.
*/
create_read_req_cqe(wq, hw_cqe, &read_cqe);
hw_cqe = &read_cqe;
advance_oldest_read(wq);
}
/*
* T3A: Discard TERMINATE CQEs.
*/
if (CQE_OPCODE(*hw_cqe) == T3_TERMINATE) {
ret = -1;
wq->error = 1;
goto skip_cqe;
}
if (CQE_STATUS(*hw_cqe) || wq->error) {
*cqe_flushed = wq->error;
wq->error = 1;
/*
* T3A inserts errors into the CQE. We cannot return
* these as work completions.
*/
/* incoming write failures */
if ((CQE_OPCODE(*hw_cqe) == T3_RDMA_WRITE)
&& RQ_TYPE(*hw_cqe)) {
ret = -1;
goto skip_cqe;
}
/* incoming read request failures */
if ((CQE_OPCODE(*hw_cqe) == T3_READ_RESP) && SQ_TYPE(*hw_cqe)) {
ret = -1;
goto skip_cqe;
}
/* incoming SEND with no receive posted failures */
if (CQE_SEND_OPCODE(*hw_cqe) && RQ_TYPE(*hw_cqe) &&
Q_EMPTY(wq->rq_rptr, wq->rq_wptr)) {
ret = -1;
goto skip_cqe;
}
BUG_ON((*cqe_flushed == 0) && !SW_CQE(*hw_cqe));
goto proc_cqe;
}
/*
* RECV completion.
*/
if (RQ_TYPE(*hw_cqe)) {
/*
* HW only validates 4 bits of MSN. So we must validate that
* the MSN in the SEND is the next expected MSN. If its not,
* then we complete this with TPT_ERR_MSN and mark the wq in
* error.
*/
if (Q_EMPTY(wq->rq_rptr, wq->rq_wptr)) {
wq->error = 1;
ret = -1;
goto skip_cqe;
}
if (unlikely((CQE_WRID_MSN(*hw_cqe) != (wq->rq_rptr + 1)))) {
wq->error = 1;
hw_cqe->header |= htonl(V_CQE_STATUS(TPT_ERR_MSN));
goto proc_cqe;
}
goto proc_cqe;
}
/*
* If we get here its a send completion.
*
* Handle out of order completion. These get stuffed
* in the SW SQ. Then the SW SQ is walked to move any
* now in-order completions into the SW CQ. This handles
* 2 cases:
* 1) reaping unsignaled WRs when the first subsequent
* signaled WR is completed.
* 2) out of order read completions.
*/
if (!SW_CQE(*hw_cqe) && (CQE_WRID_SQ_WPTR(*hw_cqe) != wq->sq_rptr)) {
struct t3_swsq *sqp;
PDBG("%s out of order completion going in swsq at idx %ld\n",
__func__,
Q_PTR2IDX(CQE_WRID_SQ_WPTR(*hw_cqe), wq->sq_size_log2));
sqp = wq->sq +
Q_PTR2IDX(CQE_WRID_SQ_WPTR(*hw_cqe), wq->sq_size_log2);
sqp->cqe = *hw_cqe;
sqp->complete = 1;
ret = -1;
goto flush_wq;
}
proc_cqe:
*cqe = *hw_cqe;
/*
* Reap the associated WR(s) that are freed up with this
* completion.
*/
if (SQ_TYPE(*hw_cqe)) {
wq->sq_rptr = CQE_WRID_SQ_WPTR(*hw_cqe);
PDBG("%s completing sq idx %ld\n", __func__,
Q_PTR2IDX(wq->sq_rptr, wq->sq_size_log2));
*cookie = wq->sq[Q_PTR2IDX(wq->sq_rptr, wq->sq_size_log2)].wr_id;
wq->sq_rptr++;
} else {
PDBG("%s completing rq idx %ld\n", __func__,
Q_PTR2IDX(wq->rq_rptr, wq->rq_size_log2));
*cookie = wq->rq[Q_PTR2IDX(wq->rq_rptr, wq->rq_size_log2)].wr_id;
if (wq->rq[Q_PTR2IDX(wq->rq_rptr, wq->rq_size_log2)].pbl_addr)
cxio_hal_pblpool_free(wq->rdev,
wq->rq[Q_PTR2IDX(wq->rq_rptr,
wq->rq_size_log2)].pbl_addr, T3_STAG0_PBL_SIZE);
BUG_ON(Q_EMPTY(wq->rq_rptr, wq->rq_wptr));
wq->rq_rptr++;
}
flush_wq:
/*
* Flush any completed cqes that are now in-order.
*/
flush_completed_wrs(wq, cq);
skip_cqe:
if (SW_CQE(*hw_cqe)) {
PDBG("%s cq %p cqid 0x%x skip sw cqe sw_rptr 0x%x\n",
__func__, cq, cq->cqid, cq->sw_rptr);
++cq->sw_rptr;
} else {
PDBG("%s cq %p cqid 0x%x skip hw cqe rptr 0x%x\n",
__func__, cq, cq->cqid, cq->rptr);
++cq->rptr;
/*
* T3A: compute credits.
*/
if (((cq->rptr - cq->wptr) > (1 << (cq->size_log2 - 1)))
|| ((cq->rptr - cq->wptr) >= 128)) {
*credit = cq->rptr - cq->wptr;
cq->wptr = cq->rptr;
}
}
return ret;
}
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