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init.c
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/*
* Copyright(c) 2015, 2016 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* 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.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/idr.h>
#include <linux/module.h>
#include <linux/printk.h>
#include <linux/hrtimer.h>
#include "hfi.h"
#include "device.h"
#include "common.h"
#include "trace.h"
#include "mad.h"
#include "sdma.h"
#include "debugfs.h"
#include "verbs.h"
#include "aspm.h"
#undef pr_fmt
#define pr_fmt(fmt) DRIVER_NAME ": " fmt
/*
* min buffers we want to have per context, after driver
*/
#define HFI1_MIN_USER_CTXT_BUFCNT 7
#define HFI1_MIN_HDRQ_EGRBUF_CNT 2
#define HFI1_MAX_HDRQ_EGRBUF_CNT 16352
#define HFI1_MIN_EAGER_BUFFER_SIZE (4 * 1024) /* 4KB */
#define HFI1_MAX_EAGER_BUFFER_SIZE (256 * 1024) /* 256KB */
/*
* Number of user receive contexts we are configured to use (to allow for more
* pio buffers per ctxt, etc.) Zero means use one user context per CPU.
*/
int num_user_contexts = -1;
module_param_named(num_user_contexts, num_user_contexts, uint, S_IRUGO);
MODULE_PARM_DESC(
num_user_contexts, "Set max number of user contexts to use");
uint krcvqs[RXE_NUM_DATA_VL];
int krcvqsset;
module_param_array(krcvqs, uint, &krcvqsset, S_IRUGO);
MODULE_PARM_DESC(krcvqs, "Array of the number of non-control kernel receive queues by VL");
/* computed based on above array */
unsigned n_krcvqs;
static unsigned hfi1_rcvarr_split = 25;
module_param_named(rcvarr_split, hfi1_rcvarr_split, uint, S_IRUGO);
MODULE_PARM_DESC(rcvarr_split, "Percent of context's RcvArray entries used for Eager buffers");
static uint eager_buffer_size = (2 << 20); /* 2MB */
module_param(eager_buffer_size, uint, S_IRUGO);
MODULE_PARM_DESC(eager_buffer_size, "Size of the eager buffers, default: 2MB");
static uint rcvhdrcnt = 2048; /* 2x the max eager buffer count */
module_param_named(rcvhdrcnt, rcvhdrcnt, uint, S_IRUGO);
MODULE_PARM_DESC(rcvhdrcnt, "Receive header queue count (default 2048)");
static uint hfi1_hdrq_entsize = 32;
module_param_named(hdrq_entsize, hfi1_hdrq_entsize, uint, S_IRUGO);
MODULE_PARM_DESC(hdrq_entsize, "Size of header queue entries: 2 - 8B, 16 - 64B (default), 32 - 128B");
unsigned int user_credit_return_threshold = 33; /* default is 33% */
module_param(user_credit_return_threshold, uint, S_IRUGO);
MODULE_PARM_DESC(user_credit_return_threshold, "Credit return threshold for user send contexts, return when unreturned credits passes this many blocks (in percent of allocated blocks, 0 is off)");
static inline u64 encode_rcv_header_entry_size(u16);
static struct idr hfi1_unit_table;
u32 hfi1_cpulist_count;
unsigned long *hfi1_cpulist;
/*
* Common code for creating the receive context array.
*/
int hfi1_create_ctxts(struct hfi1_devdata *dd)
{
unsigned i;
int ret;
/* Control context has to be always 0 */
BUILD_BUG_ON(HFI1_CTRL_CTXT != 0);
dd->rcd = kzalloc_node(dd->num_rcv_contexts * sizeof(*dd->rcd),
GFP_KERNEL, dd->node);
if (!dd->rcd) {
dd_dev_err(dd,
"Unable to allocate receive context array, failing\n");
goto nomem;
}
/* create one or more kernel contexts */
for (i = 0; i < dd->first_user_ctxt; ++i) {
struct hfi1_pportdata *ppd;
struct hfi1_ctxtdata *rcd;
ppd = dd->pport + (i % dd->num_pports);
rcd = hfi1_create_ctxtdata(ppd, i, dd->node);
if (!rcd) {
dd_dev_err(dd,
"Unable to allocate kernel receive context, failing\n");
goto nomem;
}
/*
* Set up the kernel context flags here and now because they
* use default values for all receive side memories. User
* contexts will be handled as they are created.
*/
rcd->flags = HFI1_CAP_KGET(MULTI_PKT_EGR) |
HFI1_CAP_KGET(NODROP_RHQ_FULL) |
HFI1_CAP_KGET(NODROP_EGR_FULL) |
HFI1_CAP_KGET(DMA_RTAIL);
/* Control context must use DMA_RTAIL */
if (rcd->ctxt == HFI1_CTRL_CTXT)
rcd->flags |= HFI1_CAP_DMA_RTAIL;
rcd->seq_cnt = 1;
rcd->sc = sc_alloc(dd, SC_ACK, rcd->rcvhdrqentsize, dd->node);
if (!rcd->sc) {
dd_dev_err(dd,
"Unable to allocate kernel send context, failing\n");
dd->rcd[rcd->ctxt] = NULL;
hfi1_free_ctxtdata(dd, rcd);
goto nomem;
}
ret = hfi1_init_ctxt(rcd->sc);
if (ret < 0) {
dd_dev_err(dd,
"Failed to setup kernel receive context, failing\n");
sc_free(rcd->sc);
dd->rcd[rcd->ctxt] = NULL;
hfi1_free_ctxtdata(dd, rcd);
ret = -EFAULT;
goto bail;
}
}
/*
* Initialize aspm, to be done after gen3 transition and setting up
* contexts and before enabling interrupts
*/
aspm_init(dd);
return 0;
nomem:
ret = -ENOMEM;
bail:
kfree(dd->rcd);
dd->rcd = NULL;
return ret;
}
/*
* Common code for user and kernel context setup.
*/
struct hfi1_ctxtdata *hfi1_create_ctxtdata(struct hfi1_pportdata *ppd, u32 ctxt,
int numa)
{
struct hfi1_devdata *dd = ppd->dd;
struct hfi1_ctxtdata *rcd;
unsigned kctxt_ngroups = 0;
u32 base;
if (dd->rcv_entries.nctxt_extra >
dd->num_rcv_contexts - dd->first_user_ctxt)
kctxt_ngroups = (dd->rcv_entries.nctxt_extra -
(dd->num_rcv_contexts - dd->first_user_ctxt));
rcd = kzalloc(sizeof(*rcd), GFP_KERNEL);
if (rcd) {
u32 rcvtids, max_entries;
hfi1_cdbg(PROC, "setting up context %u\n", ctxt);
INIT_LIST_HEAD(&rcd->qp_wait_list);
rcd->ppd = ppd;
rcd->dd = dd;
rcd->cnt = 1;
rcd->ctxt = ctxt;
dd->rcd[ctxt] = rcd;
rcd->numa_id = numa;
rcd->rcv_array_groups = dd->rcv_entries.ngroups;
mutex_init(&rcd->exp_lock);
/*
* Calculate the context's RcvArray entry starting point.
* We do this here because we have to take into account all
* the RcvArray entries that previous context would have
* taken and we have to account for any extra groups
* assigned to the kernel or user contexts.
*/
if (ctxt < dd->first_user_ctxt) {
if (ctxt < kctxt_ngroups) {
base = ctxt * (dd->rcv_entries.ngroups + 1);
rcd->rcv_array_groups++;
} else
base = kctxt_ngroups +
(ctxt * dd->rcv_entries.ngroups);
} else {
u16 ct = ctxt - dd->first_user_ctxt;
base = ((dd->n_krcv_queues * dd->rcv_entries.ngroups) +
kctxt_ngroups);
if (ct < dd->rcv_entries.nctxt_extra) {
base += ct * (dd->rcv_entries.ngroups + 1);
rcd->rcv_array_groups++;
} else
base += dd->rcv_entries.nctxt_extra +
(ct * dd->rcv_entries.ngroups);
}
rcd->eager_base = base * dd->rcv_entries.group_size;
/* Validate and initialize Rcv Hdr Q variables */
if (rcvhdrcnt % HDRQ_INCREMENT) {
dd_dev_err(dd,
"ctxt%u: header queue count %d must be divisible by %lu\n",
rcd->ctxt, rcvhdrcnt, HDRQ_INCREMENT);
goto bail;
}
rcd->rcvhdrq_cnt = rcvhdrcnt;
rcd->rcvhdrqentsize = hfi1_hdrq_entsize;
/*
* Simple Eager buffer allocation: we have already pre-allocated
* the number of RcvArray entry groups. Each ctxtdata structure
* holds the number of groups for that context.
*
* To follow CSR requirements and maintain cacheline alignment,
* make sure all sizes and bases are multiples of group_size.
*
* The expected entry count is what is left after assigning
* eager.
*/
max_entries = rcd->rcv_array_groups *
dd->rcv_entries.group_size;
rcvtids = ((max_entries * hfi1_rcvarr_split) / 100);
rcd->egrbufs.count = round_down(rcvtids,
dd->rcv_entries.group_size);
if (rcd->egrbufs.count > MAX_EAGER_ENTRIES) {
dd_dev_err(dd, "ctxt%u: requested too many RcvArray entries.\n",
rcd->ctxt);
rcd->egrbufs.count = MAX_EAGER_ENTRIES;
}
hfi1_cdbg(PROC,
"ctxt%u: max Eager buffer RcvArray entries: %u\n",
rcd->ctxt, rcd->egrbufs.count);
/*
* Allocate array that will hold the eager buffer accounting
* data.
* This will allocate the maximum possible buffer count based
* on the value of the RcvArray split parameter.
* The resulting value will be rounded down to the closest
* multiple of dd->rcv_entries.group_size.
*/
rcd->egrbufs.buffers = kzalloc(sizeof(*rcd->egrbufs.buffers) *
rcd->egrbufs.count, GFP_KERNEL);
if (!rcd->egrbufs.buffers)
goto bail;
rcd->egrbufs.rcvtids = kzalloc(sizeof(*rcd->egrbufs.rcvtids) *
rcd->egrbufs.count, GFP_KERNEL);
if (!rcd->egrbufs.rcvtids)
goto bail;
rcd->egrbufs.size = eager_buffer_size;
/*
* The size of the buffers programmed into the RcvArray
* entries needs to be big enough to handle the highest
* MTU supported.
*/
if (rcd->egrbufs.size < hfi1_max_mtu) {
rcd->egrbufs.size = __roundup_pow_of_two(hfi1_max_mtu);
hfi1_cdbg(PROC,
"ctxt%u: eager bufs size too small. Adjusting to %zu\n",
rcd->ctxt, rcd->egrbufs.size);
}
rcd->egrbufs.rcvtid_size = HFI1_MAX_EAGER_BUFFER_SIZE;
if (ctxt < dd->first_user_ctxt) { /* N/A for PSM contexts */
rcd->opstats = kzalloc(sizeof(*rcd->opstats),
GFP_KERNEL);
if (!rcd->opstats) {
dd_dev_err(dd,
"ctxt%u: Unable to allocate per ctxt stats buffer\n",
rcd->ctxt);
goto bail;
}
}
}
return rcd;
bail:
kfree(rcd->opstats);
kfree(rcd->egrbufs.rcvtids);
kfree(rcd->egrbufs.buffers);
kfree(rcd);
return NULL;
}
/*
* Convert a receive header entry size that to the encoding used in the CSR.
*
* Return a zero if the given size is invalid.
*/
static inline u64 encode_rcv_header_entry_size(u16 size)
{
/* there are only 3 valid receive header entry sizes */
if (size == 2)
return 1;
if (size == 16)
return 2;
else if (size == 32)
return 4;
return 0; /* invalid */
}
/*
* Select the largest ccti value over all SLs to determine the intra-
* packet gap for the link.
*
* called with cca_timer_lock held (to protect access to cca_timer
* array), and rcu_read_lock() (to protect access to cc_state).
*/
void set_link_ipg(struct hfi1_pportdata *ppd)
{
struct hfi1_devdata *dd = ppd->dd;
struct cc_state *cc_state;
int i;
u16 cce, ccti_limit, max_ccti = 0;
u16 shift, mult;
u64 src;
u32 current_egress_rate; /* Mbits /sec */
u32 max_pkt_time;
/*
* max_pkt_time is the maximum packet egress time in units
* of the fabric clock period 1/(805 MHz).
*/
cc_state = get_cc_state(ppd);
if (!cc_state)
/*
* This should _never_ happen - rcu_read_lock() is held,
* and set_link_ipg() should not be called if cc_state
* is NULL.
*/
return;
for (i = 0; i < OPA_MAX_SLS; i++) {
u16 ccti = ppd->cca_timer[i].ccti;
if (ccti > max_ccti)
max_ccti = ccti;
}
ccti_limit = cc_state->cct.ccti_limit;
if (max_ccti > ccti_limit)
max_ccti = ccti_limit;
cce = cc_state->cct.entries[max_ccti].entry;
shift = (cce & 0xc000) >> 14;
mult = (cce & 0x3fff);
current_egress_rate = active_egress_rate(ppd);
max_pkt_time = egress_cycles(ppd->ibmaxlen, current_egress_rate);
src = (max_pkt_time >> shift) * mult;
src &= SEND_STATIC_RATE_CONTROL_CSR_SRC_RELOAD_SMASK;
src <<= SEND_STATIC_RATE_CONTROL_CSR_SRC_RELOAD_SHIFT;
write_csr(dd, SEND_STATIC_RATE_CONTROL, src);
}
static enum hrtimer_restart cca_timer_fn(struct hrtimer *t)
{
struct cca_timer *cca_timer;
struct hfi1_pportdata *ppd;
int sl;
u16 ccti_timer, ccti_min;
struct cc_state *cc_state;
unsigned long flags;
enum hrtimer_restart ret = HRTIMER_NORESTART;
cca_timer = container_of(t, struct cca_timer, hrtimer);
ppd = cca_timer->ppd;
sl = cca_timer->sl;
rcu_read_lock();
cc_state = get_cc_state(ppd);
if (!cc_state) {
rcu_read_unlock();
return HRTIMER_NORESTART;
}
/*
* 1) decrement ccti for SL
* 2) calculate IPG for link (set_link_ipg())
* 3) restart timer, unless ccti is at min value
*/
ccti_min = cc_state->cong_setting.entries[sl].ccti_min;
ccti_timer = cc_state->cong_setting.entries[sl].ccti_timer;
spin_lock_irqsave(&ppd->cca_timer_lock, flags);
if (cca_timer->ccti > ccti_min) {
cca_timer->ccti--;
set_link_ipg(ppd);
}
if (cca_timer->ccti > ccti_min) {
unsigned long nsec = 1024 * ccti_timer;
/* ccti_timer is in units of 1.024 usec */
hrtimer_forward_now(t, ns_to_ktime(nsec));
ret = HRTIMER_RESTART;
}
spin_unlock_irqrestore(&ppd->cca_timer_lock, flags);
rcu_read_unlock();
return ret;
}
/*
* Common code for initializing the physical port structure.
*/
void hfi1_init_pportdata(struct pci_dev *pdev, struct hfi1_pportdata *ppd,
struct hfi1_devdata *dd, u8 hw_pidx, u8 port)
{
int i, size;
uint default_pkey_idx;
ppd->dd = dd;
ppd->hw_pidx = hw_pidx;
ppd->port = port; /* IB port number, not index */
default_pkey_idx = 1;
ppd->pkeys[default_pkey_idx] = DEFAULT_P_KEY;
if (loopback) {
hfi1_early_err(&pdev->dev,
"Faking data partition 0x8001 in idx %u\n",
!default_pkey_idx);
ppd->pkeys[!default_pkey_idx] = 0x8001;
}
INIT_WORK(&ppd->link_vc_work, handle_verify_cap);
INIT_WORK(&ppd->link_up_work, handle_link_up);
INIT_WORK(&ppd->link_down_work, handle_link_down);
INIT_WORK(&ppd->freeze_work, handle_freeze);
INIT_WORK(&ppd->link_downgrade_work, handle_link_downgrade);
INIT_WORK(&ppd->sma_message_work, handle_sma_message);
INIT_WORK(&ppd->link_bounce_work, handle_link_bounce);
INIT_WORK(&ppd->qsfp_info.qsfp_work, qsfp_event);
INIT_WORK(&ppd->linkstate_active_work, receive_interrupt_work);
mutex_init(&ppd->hls_lock);
spin_lock_init(&ppd->sdma_alllock);
spin_lock_init(&ppd->qsfp_info.qsfp_lock);
ppd->qsfp_info.ppd = ppd;
ppd->sm_trap_qp = 0x0;
ppd->sa_qp = 0x1;
ppd->hfi1_wq = NULL;
spin_lock_init(&ppd->cca_timer_lock);
for (i = 0; i < OPA_MAX_SLS; i++) {
hrtimer_init(&ppd->cca_timer[i].hrtimer, CLOCK_MONOTONIC,
HRTIMER_MODE_REL);
ppd->cca_timer[i].ppd = ppd;
ppd->cca_timer[i].sl = i;
ppd->cca_timer[i].ccti = 0;
ppd->cca_timer[i].hrtimer.function = cca_timer_fn;
}
ppd->cc_max_table_entries = IB_CC_TABLE_CAP_DEFAULT;
spin_lock_init(&ppd->cc_state_lock);
spin_lock_init(&ppd->cc_log_lock);
size = sizeof(struct cc_state);
RCU_INIT_POINTER(ppd->cc_state, kzalloc(size, GFP_KERNEL));
if (!rcu_dereference(ppd->cc_state))
goto bail;
return;
bail:
hfi1_early_err(&pdev->dev,
"Congestion Control Agent disabled for port %d\n", port);
}
/*
* Do initialization for device that is only needed on
* first detect, not on resets.
*/
static int loadtime_init(struct hfi1_devdata *dd)
{
return 0;
}
/**
* init_after_reset - re-initialize after a reset
* @dd: the hfi1_ib device
*
* sanity check at least some of the values after reset, and
* ensure no receive or transmit (explicitly, in case reset
* failed
*/
static int init_after_reset(struct hfi1_devdata *dd)
{
int i;
/*
* Ensure chip does no sends or receives, tail updates, or
* pioavail updates while we re-initialize. This is mostly
* for the driver data structures, not chip registers.
*/
for (i = 0; i < dd->num_rcv_contexts; i++)
hfi1_rcvctrl(dd, HFI1_RCVCTRL_CTXT_DIS |
HFI1_RCVCTRL_INTRAVAIL_DIS |
HFI1_RCVCTRL_TAILUPD_DIS, i);
pio_send_control(dd, PSC_GLOBAL_DISABLE);
for (i = 0; i < dd->num_send_contexts; i++)
sc_disable(dd->send_contexts[i].sc);
return 0;
}
static void enable_chip(struct hfi1_devdata *dd)
{
u32 rcvmask;
u32 i;
/* enable PIO send */
pio_send_control(dd, PSC_GLOBAL_ENABLE);
/*
* Enable kernel ctxts' receive and receive interrupt.
* Other ctxts done as user opens and initializes them.
*/
for (i = 0; i < dd->first_user_ctxt; ++i) {
rcvmask = HFI1_RCVCTRL_CTXT_ENB | HFI1_RCVCTRL_INTRAVAIL_ENB;
rcvmask |= HFI1_CAP_KGET_MASK(dd->rcd[i]->flags, DMA_RTAIL) ?
HFI1_RCVCTRL_TAILUPD_ENB : HFI1_RCVCTRL_TAILUPD_DIS;
if (!HFI1_CAP_KGET_MASK(dd->rcd[i]->flags, MULTI_PKT_EGR))
rcvmask |= HFI1_RCVCTRL_ONE_PKT_EGR_ENB;
if (HFI1_CAP_KGET_MASK(dd->rcd[i]->flags, NODROP_RHQ_FULL))
rcvmask |= HFI1_RCVCTRL_NO_RHQ_DROP_ENB;
if (HFI1_CAP_KGET_MASK(dd->rcd[i]->flags, NODROP_EGR_FULL))
rcvmask |= HFI1_RCVCTRL_NO_EGR_DROP_ENB;
hfi1_rcvctrl(dd, rcvmask, i);
sc_enable(dd->rcd[i]->sc);
}
}
/**
* create_workqueues - create per port workqueues
* @dd: the hfi1_ib device
*/
static int create_workqueues(struct hfi1_devdata *dd)
{
int pidx;
struct hfi1_pportdata *ppd;
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
if (!ppd->hfi1_wq) {
ppd->hfi1_wq =
alloc_workqueue(
"hfi%d_%d",
WQ_SYSFS | WQ_HIGHPRI | WQ_CPU_INTENSIVE,
dd->num_sdma,
dd->unit, pidx);
if (!ppd->hfi1_wq)
goto wq_error;
}
}
return 0;
wq_error:
pr_err("alloc_workqueue failed for port %d\n", pidx + 1);
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
if (ppd->hfi1_wq) {
destroy_workqueue(ppd->hfi1_wq);
ppd->hfi1_wq = NULL;
}
}
return -ENOMEM;
}
/**
* hfi1_init - do the actual initialization sequence on the chip
* @dd: the hfi1_ib device
* @reinit: re-initializing, so don't allocate new memory
*
* Do the actual initialization sequence on the chip. This is done
* both from the init routine called from the PCI infrastructure, and
* when we reset the chip, or detect that it was reset internally,
* or it's administratively re-enabled.
*
* Memory allocation here and in called routines is only done in
* the first case (reinit == 0). We have to be careful, because even
* without memory allocation, we need to re-write all the chip registers
* TIDs, etc. after the reset or enable has completed.
*/
int hfi1_init(struct hfi1_devdata *dd, int reinit)
{
int ret = 0, pidx, lastfail = 0;
unsigned i, len;
struct hfi1_ctxtdata *rcd;
struct hfi1_pportdata *ppd;
/* Set up recv low level handlers */
dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_EXPECTED] =
kdeth_process_expected;
dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_EAGER] =
kdeth_process_eager;
dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_IB] = process_receive_ib;
dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_ERROR] =
process_receive_error;
dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_BYPASS] =
process_receive_bypass;
dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_INVALID5] =
process_receive_invalid;
dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_INVALID6] =
process_receive_invalid;
dd->normal_rhf_rcv_functions[RHF_RCV_TYPE_INVALID7] =
process_receive_invalid;
dd->rhf_rcv_function_map = dd->normal_rhf_rcv_functions;
/* Set up send low level handlers */
dd->process_pio_send = hfi1_verbs_send_pio;
dd->process_dma_send = hfi1_verbs_send_dma;
dd->pio_inline_send = pio_copy;
if (is_ax(dd)) {
atomic_set(&dd->drop_packet, DROP_PACKET_ON);
dd->do_drop = 1;
} else {
atomic_set(&dd->drop_packet, DROP_PACKET_OFF);
dd->do_drop = 0;
}
/* make sure the link is not "up" */
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
ppd->linkup = 0;
}
if (reinit)
ret = init_after_reset(dd);
else
ret = loadtime_init(dd);
if (ret)
goto done;
/* allocate dummy tail memory for all receive contexts */
dd->rcvhdrtail_dummy_kvaddr = dma_zalloc_coherent(
&dd->pcidev->dev, sizeof(u64),
&dd->rcvhdrtail_dummy_physaddr,
GFP_KERNEL);
if (!dd->rcvhdrtail_dummy_kvaddr) {
dd_dev_err(dd, "cannot allocate dummy tail memory\n");
ret = -ENOMEM;
goto done;
}
/* dd->rcd can be NULL if early initialization failed */
for (i = 0; dd->rcd && i < dd->first_user_ctxt; ++i) {
/*
* Set up the (kernel) rcvhdr queue and egr TIDs. If doing
* re-init, the simplest way to handle this is to free
* existing, and re-allocate.
* Need to re-create rest of ctxt 0 ctxtdata as well.
*/
rcd = dd->rcd[i];
if (!rcd)
continue;
rcd->do_interrupt = &handle_receive_interrupt;
lastfail = hfi1_create_rcvhdrq(dd, rcd);
if (!lastfail)
lastfail = hfi1_setup_eagerbufs(rcd);
if (lastfail)
dd_dev_err(dd,
"failed to allocate kernel ctxt's rcvhdrq and/or egr bufs\n");
}
if (lastfail)
ret = lastfail;
/* Allocate enough memory for user event notification. */
len = ALIGN(dd->chip_rcv_contexts * HFI1_MAX_SHARED_CTXTS *
sizeof(*dd->events), PAGE_SIZE);
dd->events = vmalloc_user(len);
if (!dd->events)
dd_dev_err(dd, "Failed to allocate user events page\n");
/*
* Allocate a page for device and port status.
* Page will be shared amongst all user processes.
*/
dd->status = vmalloc_user(PAGE_SIZE);
if (!dd->status)
dd_dev_err(dd, "Failed to allocate dev status page\n");
else
dd->freezelen = PAGE_SIZE - (sizeof(*dd->status) -
sizeof(dd->status->freezemsg));
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
if (dd->status)
/* Currently, we only have one port */
ppd->statusp = &dd->status->port;
set_mtu(ppd);
}
/* enable chip even if we have an error, so we can debug cause */
enable_chip(dd);
ret = hfi1_cq_init(dd);
done:
/*
* Set status even if port serdes is not initialized
* so that diags will work.
*/
if (dd->status)
dd->status->dev |= HFI1_STATUS_CHIP_PRESENT |
HFI1_STATUS_INITTED;
if (!ret) {
/* enable all interrupts from the chip */
set_intr_state(dd, 1);
/* chip is OK for user apps; mark it as initialized */
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
/* start the serdes - must be after interrupts are
* enabled so we are notified when the link goes up
*/
lastfail = bringup_serdes(ppd);
if (lastfail)
dd_dev_info(dd,
"Failed to bring up port %u\n",
ppd->port);
/*
* Set status even if port serdes is not initialized
* so that diags will work.
*/
if (ppd->statusp)
*ppd->statusp |= HFI1_STATUS_CHIP_PRESENT |
HFI1_STATUS_INITTED;
if (!ppd->link_speed_enabled)
continue;
}
}
/* if ret is non-zero, we probably should do some cleanup here... */
return ret;
}
static inline struct hfi1_devdata *__hfi1_lookup(int unit)
{
return idr_find(&hfi1_unit_table, unit);
}
struct hfi1_devdata *hfi1_lookup(int unit)
{
struct hfi1_devdata *dd;
unsigned long flags;
spin_lock_irqsave(&hfi1_devs_lock, flags);
dd = __hfi1_lookup(unit);
spin_unlock_irqrestore(&hfi1_devs_lock, flags);
return dd;
}
/*
* Stop the timers during unit shutdown, or after an error late
* in initialization.
*/
static void stop_timers(struct hfi1_devdata *dd)
{
struct hfi1_pportdata *ppd;
int pidx;
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
if (ppd->led_override_timer.data) {
del_timer_sync(&ppd->led_override_timer);
atomic_set(&ppd->led_override_timer_active, 0);
}
}
}
/**
* shutdown_device - shut down a device
* @dd: the hfi1_ib device
*
* This is called to make the device quiet when we are about to
* unload the driver, and also when the device is administratively
* disabled. It does not free any data structures.
* Everything it does has to be setup again by hfi1_init(dd, 1)
*/
static void shutdown_device(struct hfi1_devdata *dd)
{
struct hfi1_pportdata *ppd;
unsigned pidx;
int i;
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
ppd->linkup = 0;
if (ppd->statusp)
*ppd->statusp &= ~(HFI1_STATUS_IB_CONF |
HFI1_STATUS_IB_READY);
}
dd->flags &= ~HFI1_INITTED;
/* mask interrupts, but not errors */
set_intr_state(dd, 0);
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
for (i = 0; i < dd->num_rcv_contexts; i++)
hfi1_rcvctrl(dd, HFI1_RCVCTRL_TAILUPD_DIS |
HFI1_RCVCTRL_CTXT_DIS |
HFI1_RCVCTRL_INTRAVAIL_DIS |
HFI1_RCVCTRL_PKEY_DIS |
HFI1_RCVCTRL_ONE_PKT_EGR_DIS, i);
/*
* Gracefully stop all sends allowing any in progress to
* trickle out first.
*/
for (i = 0; i < dd->num_send_contexts; i++)
sc_flush(dd->send_contexts[i].sc);
}
/*
* Enough for anything that's going to trickle out to have actually
* done so.
*/
udelay(20);
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
/* disable all contexts */
for (i = 0; i < dd->num_send_contexts; i++)
sc_disable(dd->send_contexts[i].sc);
/* disable the send device */
pio_send_control(dd, PSC_GLOBAL_DISABLE);
shutdown_led_override(ppd);
/*
* Clear SerdesEnable.
* We can't count on interrupts since we are stopping.
*/
hfi1_quiet_serdes(ppd);
if (ppd->hfi1_wq) {
destroy_workqueue(ppd->hfi1_wq);
ppd->hfi1_wq = NULL;
}
}
sdma_exit(dd);
}
/**
* hfi1_free_ctxtdata - free a context's allocated data
* @dd: the hfi1_ib device
* @rcd: the ctxtdata structure
*
* free up any allocated data for a context
* This should not touch anything that would affect a simultaneous
* re-allocation of context data, because it is called after hfi1_mutex
* is released (and can be called from reinit as well).
* It should never change any chip state, or global driver state.
*/
void hfi1_free_ctxtdata(struct hfi1_devdata *dd, struct hfi1_ctxtdata *rcd)
{
unsigned e;
if (!rcd)
return;
if (rcd->rcvhdrq) {
dma_free_coherent(&dd->pcidev->dev, rcd->rcvhdrq_size,
rcd->rcvhdrq, rcd->rcvhdrq_phys);
rcd->rcvhdrq = NULL;
if (rcd->rcvhdrtail_kvaddr) {
dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE,
(void *)rcd->rcvhdrtail_kvaddr,
rcd->rcvhdrqtailaddr_phys);
rcd->rcvhdrtail_kvaddr = NULL;
}
}
/* all the RcvArray entries should have been cleared by now */
kfree(rcd->egrbufs.rcvtids);
for (e = 0; e < rcd->egrbufs.alloced; e++) {
if (rcd->egrbufs.buffers[e].phys)
dma_free_coherent(&dd->pcidev->dev,
rcd->egrbufs.buffers[e].len,
rcd->egrbufs.buffers[e].addr,
rcd->egrbufs.buffers[e].phys);
}
kfree(rcd->egrbufs.buffers);
sc_free(rcd->sc);
vfree(rcd->user_event_mask);
vfree(rcd->subctxt_uregbase);
vfree(rcd->subctxt_rcvegrbuf);
vfree(rcd->subctxt_rcvhdr_base);
kfree(rcd->opstats);
kfree(rcd);
}
/*
* Release our hold on the shared asic data. If we are the last one,
* free the structure. Must be holding hfi1_devs_lock.
*/
static void release_asic_data(struct hfi1_devdata *dd)
{
int other;
if (!dd->asic_data)
return;
dd->asic_data->dds[dd->hfi1_id] = NULL;
other = dd->hfi1_id ? 0 : 1;
if (!dd->asic_data->dds[other]) {
/* we are the last holder, free it */
kfree(dd->asic_data);
}
dd->asic_data = NULL;
}
void hfi1_free_devdata(struct hfi1_devdata *dd)
{
unsigned long flags;