diff options
Diffstat (limited to 'drivers/staging/rdma/hfi1/init.c')
| -rw-r--r-- | drivers/staging/rdma/hfi1/init.c | 1818 |
1 files changed, 0 insertions, 1818 deletions
diff --git a/drivers/staging/rdma/hfi1/init.c b/drivers/staging/rdma/hfi1/init.c deleted file mode 100644 index 5cc492e5776d..000000000000 --- a/drivers/staging/rdma/hfi1/init.c +++ /dev/null @@ -1,1818 +0,0 @@ -/* - * 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 <rdma/rdma_vt.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) - 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 = kcalloc(rcd->egrbufs.count, - sizeof(*rcd->egrbufs.buffers), - GFP_KERNEL); - if (!rcd->egrbufs.buffers) - goto bail; - rcd->egrbufs.rcvtids = kcalloc(rcd->egrbufs.count, - sizeof(*rcd->egrbufs.rcvtids), - 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) - goto bail; - } - } - return rcd; -bail: - 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->linkstate_active_work, receive_interrupt_work); - INIT_WORK(&ppd->qsfp_info.qsfp_work, qsfp_event); - - 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"); - ret = lastfail; - } - } - - /* Allocate enough memory for user event notification. */ - len = PAGE_ALIGN(dd->chip_rcv_contexts * HFI1_MAX_SHARED_CTXTS * - sizeof(*dd->events)); - 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); - -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; -} - -static void __hfi1_free_devdata(struct kobject *kobj) -{ - struct hfi1_devdata *dd = - container_of(kobj, struct hfi1_devdata, kobj); - unsigned long flags; - - spin_lock_irqsave(&hfi1_devs_lock, flags); - idr_remove(&hfi1_unit_table, dd->unit); - list_del(&dd->list); - release_asic_data(dd); - spin_unlock_irqrestore(&hfi1_devs_lock, flags); - free_platform_config(dd); - rcu_barrier(); /* wait for rcu callbacks to complete */ - free_percpu(dd->int_counter); - free_percpu(dd->rcv_limit); - hfi1_dev_affinity_free(dd); - free_percpu(dd->send_schedule); - rvt_dealloc_device(&dd->verbs_dev.rdi); -} - -static struct kobj_type hfi1_devdata_type = { - .release = __hfi1_free_devdata, -}; - -void hfi1_free_devdata(struct hfi1_devdata *dd) -{ - kobject_put(&dd->kobj); -} - -/* - * Allocate our primary per-unit data structure. Must be done via verbs - * allocator, because the verbs cleanup process both does cleanup and - * free of the data structure. - * "extra" is for chip-specific data. - * - * Use the idr mechanism to get a unit number for this unit. - */ -struct hfi1_devdata *hfi1_alloc_devdata(struct pci_dev *pdev, size_t extra) -{ - unsigned long flags; - struct hfi1_devdata *dd; - int ret, nports; - - /* extra is * number of ports */ - nports = extra / sizeof(struct hfi1_pportdata); - - dd = (struct hfi1_devdata *)rvt_alloc_device(sizeof(*dd) + extra, - nports); - if (!dd) - return ERR_PTR(-ENOMEM); - dd->num_pports = nports; - dd->pport = (struct hfi1_pportdata *)(dd + 1); - - INIT_LIST_HEAD(&dd->list); - idr_preload(GFP_KERNEL); - spin_lock_irqsave(&hfi1_devs_lock, flags); - - ret = idr_alloc(&hfi1_unit_table, dd, 0, 0, GFP_NOWAIT); - if (ret >= 0) { - dd->unit = ret; - list_add(&dd->list, &hfi1_dev_list); - } - - spin_unlock_irqrestore(&hfi1_devs_lock, flags); - idr_preload_end(); - - if (ret < 0) { - hfi1_early_err(&pdev->dev, - "Could not allocate unit ID: error %d\n", -ret); - goto bail; - } - /* - * Initialize all locks for the device. This needs to be as early as - * possible so locks are usable. - */ - spin_lock_init(&dd->sc_lock); - spin_lock_init(&dd->sendctrl_lock); - spin_lock_init(&dd->rcvctrl_lock); - spin_lock_init(&dd->uctxt_lock); - spin_lock_init(&dd->hfi1_diag_trans_lock); - spin_lock_init(&dd->sc_init_lock); - spin_lock_init(&dd->dc8051_lock); - spin_lock_init(&dd->dc8051_memlock); - seqlock_init(&dd->sc2vl_lock); - spin_lock_init(&dd->sde_map_lock); - spin_lock_init(&dd->pio_map_lock); - init_waitqueue_head(&dd->event_queue); - - dd->int_counter = alloc_percpu(u64); - if (!dd->int_counter) { - ret = -ENOMEM; - hfi1_early_err(&pdev->dev, - "Could not allocate per-cpu int_counter\n"); - goto bail; - } - - dd->rcv_limit = alloc_percpu(u64); - if (!dd->rcv_limit) { - ret = -ENOMEM; - hfi1_early_err(&pdev->dev, - "Could not allocate per-cpu rcv_limit\n"); - goto bail; - } - - dd->send_schedule = alloc_percpu(u64); - if (!dd->send_schedule) { - ret = -ENOMEM; - hfi1_early_err(&pdev->dev, - "Could not allocate per-cpu int_counter\n"); - goto bail; - } - - if (!hfi1_cpulist_count) { - u32 count = num_online_cpus(); - - hfi1_cpulist = kcalloc(BITS_TO_LONGS(count), sizeof(long), - GFP_KERNEL); - if (hfi1_cpulist) - hfi1_cpulist_count = count; - else - hfi1_early_err( - &pdev->dev, - "Could not alloc cpulist info, cpu affinity might be wrong\n"); - } - kobject_init(&dd->kobj, &hfi1_devdata_type); - return dd; - -bail: - if (!list_empty(&dd->list)) - list_del_init(&dd->list); - rvt_dealloc_device(&dd->verbs_dev.rdi); - return ERR_PTR(ret); -} - -/* - * Called from freeze mode handlers, and from PCI error - * reporting code. Should be paranoid about state of - * system and data structures. - */ -void hfi1_disable_after_error(struct hfi1_devdata *dd) -{ - if (dd->flags & HFI1_INITTED) { - u32 pidx; - - dd->flags &= ~HFI1_INITTED; - if (dd->pport) - for (pidx = 0; pidx < dd->num_pports; ++pidx) { - struct hfi1_pportdata *ppd; - - ppd = dd->pport + pidx; - if (dd->flags & HFI1_PRESENT) - set_link_state(ppd, HLS_DN_DISABLE); - - if (ppd->statusp) - *ppd->statusp &= ~HFI1_STATUS_IB_READY; - } - } - - /* - * Mark as having had an error for driver, and also - * for /sys and status word mapped to user programs. - * This marks unit as not usable, until reset. - */ - if (dd->status) - dd->status->dev |= HFI1_STATUS_HWERROR; -} - -static void remove_one(struct pci_dev *); -static int init_one(struct pci_dev *, const struct pci_device_id *); - -#define DRIVER_LOAD_MSG "Intel " DRIVER_NAME " loaded: " -#define PFX DRIVER_NAME ": " - -static const struct pci_device_id hfi1_pci_tbl[] = { - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL0) }, - { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL1) }, - { 0, } -}; - -MODULE_DEVICE_TABLE(pci, hfi1_pci_tbl); - -static struct pci_driver hfi1_pci_driver = { - .name = DRIVER_NAME, - .probe = init_one, - .remove = remove_one, - .id_table = hfi1_pci_tbl, - .err_handler = &hfi1_pci_err_handler, -}; - -static void __init compute_krcvqs(void) -{ - int i; - - for (i = 0; i < krcvqsset; i++) - n_krcvqs += krcvqs[i]; -} - -/* - * Do all the generic driver unit- and chip-independent memory - * allocation and initialization. - */ -static int __init hfi1_mod_init(void) -{ - int ret; - - ret = dev_init(); - if (ret) - goto bail; - - /* validate max MTU before any devices start */ - if (!valid_opa_max_mtu(hfi1_max_mtu)) { - pr_err("Invalid max_mtu 0x%x, using 0x%x instead\n", - hfi1_max_mtu, HFI1_DEFAULT_MAX_MTU); - hfi1_max_mtu = HFI1_DEFAULT_MAX_MTU; - } - /* valid CUs run from 1-128 in powers of 2 */ - if (hfi1_cu > 128 || !is_power_of_2(hfi1_cu)) - hfi1_cu = 1; - /* valid credit return threshold is 0-100, variable is unsigned */ - if (user_credit_return_threshold > 100) - user_credit_return_threshold = 100; - - compute_krcvqs(); - /* - * sanitize receive interrupt count, time must wait until after - * the hardware type is known - */ - if (rcv_intr_count > RCV_HDR_HEAD_COUNTER_MASK) - rcv_intr_count = RCV_HDR_HEAD_COUNTER_MASK; - /* reject invalid combinations */ - if (rcv_intr_count == 0 && rcv_intr_timeout == 0) { - pr_err("Invalid mode: both receive interrupt count and available timeout are zero - setting interrupt count to 1\n"); - rcv_intr_count = 1; - } - if (rcv_intr_count > 1 && rcv_intr_timeout == 0) { - /* - * Avoid indefinite packet delivery by requiring a timeout - * if count is > 1. - */ - pr_err("Invalid mode: receive interrupt count greater than 1 and available timeout is zero - setting available timeout to 1\n"); - rcv_intr_timeout = 1; - } - if (rcv_intr_dynamic && !(rcv_intr_count > 1 && rcv_intr_timeout > 0)) { - /* - * The dynamic algorithm expects a non-zero timeout - * and a count > 1. - */ - pr_err("Invalid mode: dynamic receive interrupt mitigation with invalid count and timeout - turning dynamic off\n"); - rcv_intr_dynamic = 0; - } - - /* sanitize link CRC options */ - link_crc_mask &= SUPPORTED_CRCS; - - /* - * These must be called before the driver is registered with - * the PCI subsystem. - */ - idr_init(&hfi1_unit_table); - - hfi1_dbg_init(); - ret = hfi1_wss_init(); - if (ret < 0) - goto bail_wss; - ret = pci_register_driver(&hfi1_pci_driver); - if (ret < 0) { - pr_err("Unable to register driver: error %d\n", -ret); - goto bail_dev; - } - goto bail; /* all OK */ - -bail_dev: - hfi1_wss_exit(); -bail_wss: - hfi1_dbg_exit(); - idr_destroy(&hfi1_unit_table); - dev_cleanup(); -bail: - return ret; -} - -module_init(hfi1_mod_init); - -/* - * Do the non-unit driver cleanup, memory free, etc. at unload. - */ -static void __exit hfi1_mod_cleanup(void) -{ - pci_unregister_driver(&hfi1_pci_driver); - hfi1_wss_exit(); - hfi1_dbg_exit(); - hfi1_cpulist_count = 0; - kfree(hfi1_cpulist); - - idr_destroy(&hfi1_unit_table); - dispose_firmware(); /* asymmetric with obtain_firmware() */ - dev_cleanup(); -} - -module_exit(hfi1_mod_cleanup); - -/* this can only be called after a successful initialization */ -static void cleanup_device_data(struct hfi1_devdata *dd) -{ - int ctxt; - int pidx; - struct hfi1_ctxtdata **tmp; - unsigned long flags; - - /* users can't do anything more with chip */ - for (pidx = 0; pidx < dd->num_pports; ++pidx) { - struct hfi1_pportdata *ppd = &dd->pport[pidx]; - struct cc_state *cc_state; - int i; - - if (ppd->statusp) - *ppd->statusp &= ~HFI1_STATUS_CHIP_PRESENT; - - for (i = 0; i < OPA_MAX_SLS; i++) - hrtimer_cancel(&ppd->cca_timer[i].hrtimer); - - spin_lock(&ppd->cc_state_lock); - cc_state = get_cc_state(ppd); - RCU_INIT_POINTER(ppd->cc_state, NULL); - spin_unlock(&ppd->cc_state_lock); - - if (cc_state) - call_rcu(&cc_state->rcu, cc_state_reclaim); - } - - free_credit_return(dd); - - /* - * Free any resources still in use (usually just kernel contexts) - * at unload; we do for ctxtcnt, because that's what we allocate. - * We acquire lock to be really paranoid that rcd isn't being - * accessed from some interrupt-related code (that should not happen, - * but best to be sure). - */ - spin_lock_irqsave(&dd->uctxt_lock, flags); - tmp = dd->rcd; - dd->rcd = NULL; - spin_unlock_irqrestore(&dd->uctxt_lock, flags); - - if (dd->rcvhdrtail_dummy_kvaddr) { - dma_free_coherent(&dd->pcidev->dev, sizeof(u64), - (void *)dd->rcvhdrtail_dummy_kvaddr, - dd->rcvhdrtail_dummy_physaddr); - dd->rcvhdrtail_dummy_kvaddr = NULL; - } - - for (ctxt = 0; tmp && ctxt < dd->num_rcv_contexts; ctxt++) { - struct hfi1_ctxtdata *rcd = tmp[ctxt]; - - tmp[ctxt] = NULL; /* debugging paranoia */ - if (rcd) { - hfi1_clear_tids(rcd); - hfi1_free_ctxtdata(dd, rcd); - } - } - kfree(tmp); - free_pio_map(dd); - /* must follow rcv context free - need to remove rcv's hooks */ - for (ctxt = 0; ctxt < dd->num_send_contexts; ctxt++) - sc_free(dd->send_contexts[ctxt].sc); - dd->num_send_contexts = 0; - kfree(dd->send_contexts); - dd->send_contexts = NULL; - kfree(dd->hw_to_sw); - dd->hw_to_sw = NULL; - kfree(dd->boardname); - vfree(dd->events); - vfree(dd->status); -} - -/* - * Clean up on unit shutdown, or error during unit load after - * successful initialization. - */ -static void postinit_cleanup(struct hfi1_devdata *dd) -{ - hfi1_start_cleanup(dd); - - hfi1_pcie_ddcleanup(dd); - hfi1_pcie_cleanup(dd->pcidev); - - cleanup_device_data(dd); - - hfi1_free_devdata(dd); -} - -static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent) -{ - int ret = 0, j, pidx, initfail; - struct hfi1_devdata *dd = NULL; - struct hfi1_pportdata *ppd; - - /* First, lock the non-writable module parameters */ - HFI1_CAP_LOCK(); - - /* Validate some global module parameters */ - if (rcvhdrcnt <= HFI1_MIN_HDRQ_EGRBUF_CNT) { - hfi1_early_err(&pdev->dev, "Header queue count too small\n"); - ret = -EINVAL; - goto bail; - } - if (rcvhdrcnt > HFI1_MAX_HDRQ_EGRBUF_CNT) { - hfi1_early_err(&pdev->dev, - "Receive header queue count cannot be greater than %u\n", - HFI1_MAX_HDRQ_EGRBUF_CNT); - ret = -EINVAL; - goto bail; - } - /* use the encoding function as a sanitization check */ - if (!encode_rcv_header_entry_size(hfi1_hdrq_entsize)) { - hfi1_early_err(&pdev->dev, "Invalid HdrQ Entry size %u\n", - hfi1_hdrq_entsize); - ret = -EINVAL; - goto bail; - } - - /* The receive eager buffer size must be set before the receive - * contexts are created. - * - * Set the eager buffer size. Validate that it falls in a range - * allowed by the hardware - all powers of 2 between the min and - * max. The maximum valid MTU is within the eager buffer range - * so we do not need to cap the max_mtu by an eager buffer size - * setting. - */ - if (eager_buffer_size) { - if (!is_power_of_2(eager_buffer_size)) - eager_buffer_size = - roundup_pow_of_two(eager_buffer_size); - eager_buffer_size = - clamp_val(eager_buffer_size, - MIN_EAGER_BUFFER * 8, - MAX_EAGER_BUFFER_TOTAL); - hfi1_early_info(&pdev->dev, "Eager buffer size %u\n", - eager_buffer_size); - } else { - hfi1_early_err(&pdev->dev, "Invalid Eager buffer size of 0\n"); - ret = -EINVAL; - goto bail; - } - - /* restrict value of hfi1_rcvarr_split */ - hfi1_rcvarr_split = clamp_val(hfi1_rcvarr_split, 0, 100); - - ret = hfi1_pcie_init(pdev, ent); - if (ret) - goto bail; - - /* - * Do device-specific initialization, function table setup, dd - * allocation, etc. - */ - switch (ent->device) { - case PCI_DEVICE_ID_INTEL0: - case PCI_DEVICE_ID_INTEL1: - dd = hfi1_init_dd(pdev, ent); - break; - default: - hfi1_early_err(&pdev->dev, - "Failing on unknown Intel deviceid 0x%x\n", - ent->device); - ret = -ENODEV; - } - - if (IS_ERR(dd)) - ret = PTR_ERR(dd); - if (ret) - goto clean_bail; /* error already printed */ - - ret = create_workqueues(dd); - if (ret) - goto clean_bail; - - /* do the generic initialization */ - initfail = hfi1_init(dd, 0); - - ret = hfi1_register_ib_device(dd); - - /* - * Now ready for use. this should be cleared whenever we - * detect a reset, or initiate one. If earlier failure, - * we still create devices, so diags, etc. can be used - * to determine cause of problem. - */ - if (!initfail && !ret) { - dd->flags |= HFI1_INITTED; - /* create debufs files after init and ib register */ - hfi1_dbg_ibdev_init(&dd->verbs_dev); - } - - j = hfi1_device_create(dd); - if (j) - dd_dev_err(dd, "Failed to create /dev devices: %d\n", -j); - - if (initfail || ret) { - stop_timers(dd); - flush_workqueue(ib_wq); - for (pidx = 0; pidx < dd->num_pports; ++pidx) { - hfi1_quiet_serdes(dd->pport + pidx); - ppd = dd->pport + pidx; - if (ppd->hfi1_wq) { - destroy_workqueue(ppd->hfi1_wq); - ppd->hfi1_wq = NULL; - } - } - if (!j) - hfi1_device_remove(dd); - if (!ret) - hfi1_unregister_ib_device(dd); - postinit_cleanup(dd); - if (initfail) - ret = initfail; - goto bail; /* everything already cleaned */ - } - - sdma_start(dd); - - return 0; - -clean_bail: - hfi1_pcie_cleanup(pdev); -bail: - return ret; -} - -static void remove_one(struct pci_dev *pdev) -{ - struct hfi1_devdata *dd = pci_get_drvdata(pdev); - - /* close debugfs files before ib unregister */ - hfi1_dbg_ibdev_exit(&dd->verbs_dev); - /* unregister from IB core */ - hfi1_unregister_ib_device(dd); - - /* - * Disable the IB link, disable interrupts on the device, - * clear dma engines, etc. - */ - shutdown_device(dd); - - stop_timers(dd); - - /* wait until all of our (qsfp) queue_work() calls complete */ - flush_workqueue(ib_wq); - - hfi1_device_remove(dd); - - postinit_cleanup(dd); -} - -/** - * hfi1_create_rcvhdrq - create a receive header queue - * @dd: the hfi1_ib device - * @rcd: the context data - * - * This must be contiguous memory (from an i/o perspective), and must be - * DMA'able (which means for some systems, it will go through an IOMMU, - * or be forced into a low address range). - */ -int hfi1_create_rcvhdrq(struct hfi1_devdata *dd, struct hfi1_ctxtdata *rcd) -{ - unsigned amt; - u64 reg; - - if (!rcd->rcvhdrq) { - dma_addr_t phys_hdrqtail; - gfp_t gfp_flags; - - /* - * rcvhdrqentsize is in DWs, so we have to convert to bytes - * (* sizeof(u32)). - */ - amt = PAGE_ALIGN(rcd->rcvhdrq_cnt * rcd->rcvhdrqentsize * - sizeof(u32)); - - gfp_flags = (rcd->ctxt >= dd->first_user_ctxt) ? - GFP_USER : GFP_KERNEL; - rcd->rcvhdrq = dma_zalloc_coherent( - &dd->pcidev->dev, amt, &rcd->rcvhdrq_phys, - gfp_flags | __GFP_COMP); - - if (!rcd->rcvhdrq) { - dd_dev_err(dd, - "attempt to allocate %d bytes for ctxt %u rcvhdrq failed\n", - amt, rcd->ctxt); - goto bail; - } - - if (HFI1_CAP_KGET_MASK(rcd->flags, DMA_RTAIL)) { - rcd->rcvhdrtail_kvaddr = dma_zalloc_coherent( - &dd->pcidev->dev, PAGE_SIZE, &phys_hdrqtail, - gfp_flags); - if (!rcd->rcvhdrtail_kvaddr) - goto bail_free; - rcd->rcvhdrqtailaddr_phys = phys_hdrqtail; - } - - rcd->rcvhdrq_size = amt; - } - /* - * These values are per-context: - * RcvHdrCnt - * RcvHdrEntSize - * RcvHdrSize - */ - reg = ((u64)(rcd->rcvhdrq_cnt >> HDRQ_SIZE_SHIFT) - & RCV_HDR_CNT_CNT_MASK) - << RCV_HDR_CNT_CNT_SHIFT; - write_kctxt_csr(dd, rcd->ctxt, RCV_HDR_CNT, reg); - reg = (encode_rcv_header_entry_size(rcd->rcvhdrqentsize) - & RCV_HDR_ENT_SIZE_ENT_SIZE_MASK) - << RCV_HDR_ENT_SIZE_ENT_SIZE_SHIFT; - write_kctxt_csr(dd, rcd->ctxt, RCV_HDR_ENT_SIZE, reg); - reg = (dd->rcvhdrsize & RCV_HDR_SIZE_HDR_SIZE_MASK) - << RCV_HDR_SIZE_HDR_SIZE_SHIFT; - write_kctxt_csr(dd, rcd->ctxt, RCV_HDR_SIZE, reg); - - /* - * Program dummy tail address for every receive context - * before enabling any receive context - */ - write_kctxt_csr(dd, rcd->ctxt, RCV_HDR_TAIL_ADDR, - dd->rcvhdrtail_dummy_physaddr); - - return 0; - -bail_free: - dd_dev_err(dd, - "attempt to allocate 1 page for ctxt %u rcvhdrqtailaddr failed\n", - rcd->ctxt); - vfree(rcd->user_event_mask); - rcd->user_event_mask = NULL; - dma_free_coherent(&dd->pcidev->dev, amt, rcd->rcvhdrq, - rcd->rcvhdrq_phys); - rcd->rcvhdrq = NULL; -bail: - return -ENOMEM; -} - -/** - * allocate eager buffers, both kernel and user contexts. - * @rcd: the context we are setting up. - * - * Allocate the eager TID buffers and program them into hip. - * They are no longer completely contiguous, we do multiple allocation - * calls. Otherwise we get the OOM code involved, by asking for too - * much per call, with disastrous results on some kernels. - */ -int hfi1_setup_eagerbufs(struct hfi1_ctxtdata *rcd) -{ - struct hfi1_devdata *dd = rcd->dd; - u32 max_entries, egrtop, alloced_bytes = 0, idx = 0; - gfp_t gfp_flags; - u16 order; - int ret = 0; - u16 round_mtu = roundup_pow_of_two(hfi1_max_mtu); - - /* - * GFP_USER, but without GFP_FS, so buffer cache can be - * coalesced (we hope); otherwise, even at order 4, - * heavy filesystem activity makes these fail, and we can - * use compound pages. - */ - gfp_flags = __GFP_RECLAIM | __GFP_IO | __GFP_COMP; - - /* - * The minimum size of the eager buffers is a groups of MTU-sized - * buffers. - * The global eager_buffer_size parameter is checked against the - * theoretical lower limit of the value. Here, we check against the - * MTU. - */ - if (rcd->egrbufs.size < (round_mtu * dd->rcv_entries.group_size)) - rcd->egrbufs.size = round_mtu * dd->rcv_entries.group_size; - /* - * If using one-pkt-per-egr-buffer, lower the eager buffer - * size to the max MTU (page-aligned). - */ - if (!HFI1_CAP_KGET_MASK(rcd->flags, MULTI_PKT_EGR)) - rcd->egrbufs.rcvtid_size = round_mtu; - - /* - * Eager buffers sizes of 1MB or less require smaller TID sizes - * to satisfy the "multiple of 8 RcvArray entries" requirement. - */ - if (rcd->egrbufs.size <= (1 << 20)) - rcd->egrbufs.rcvtid_size = max((unsigned long)round_mtu, - rounddown_pow_of_two(rcd->egrbufs.size / 8)); - - while (alloced_bytes < rcd->egrbufs.size && - rcd->egrbufs.alloced < rcd->egrbufs.count) { - rcd->egrbufs.buffers[idx].addr = - dma_zalloc_coherent(&dd->pcidev->dev, - rcd->egrbufs.rcvtid_size, - &rcd->egrbufs.buffers[idx].phys, - gfp_flags); - if (rcd->egrbufs.buffers[idx].addr) { - rcd->egrbufs.buffers[idx].len = - rcd->egrbufs.rcvtid_size; - rcd->egrbufs.rcvtids[rcd->egrbufs.alloced].addr = - rcd->egrbufs.buffers[idx].addr; - rcd->egrbufs.rcvtids[rcd->egrbufs.alloced].phys = - rcd->egrbufs.buffers[idx].phys; - rcd->egrbufs.alloced++; - alloced_bytes += rcd->egrbufs.rcvtid_size; - idx++; - } else { - u32 new_size, i, j; - u64 offset = 0; - - /* - * Fail the eager buffer allocation if: - * - we are already using the lowest acceptable size - * - we are using one-pkt-per-egr-buffer (this implies - * that we are accepting only one size) - */ - if (rcd->egrbufs.rcvtid_size == round_mtu || - !HFI1_CAP_KGET_MASK(rcd->flags, MULTI_PKT_EGR)) { - dd_dev_err(dd, "ctxt%u: Failed to allocate eager buffers\n", - rcd->ctxt); - goto bail_rcvegrbuf_phys; - } - - new_size = rcd->egrbufs.rcvtid_size / 2; - - /* - * If the first attempt to allocate memory failed, don't - * fail everything but continue with the next lower - * size. - */ - if (idx == 0) { - rcd->egrbufs.rcvtid_size = new_size; - continue; - } - - /* - * Re-partition already allocated buffers to a smaller - * size. - */ - rcd->egrbufs.alloced = 0; - for (i = 0, j = 0, offset = 0; j < idx; i++) { - if (i >= rcd->egrbufs.count) - break; - rcd->egrbufs.rcvtids[i].phys = - rcd->egrbufs.buffers[j].phys + offset; - rcd->egrbufs.rcvtids[i].addr = - rcd->egrbufs.buffers[j].addr + offset; - rcd->egrbufs.alloced++; - if ((rcd->egrbufs.buffers[j].phys + offset + - new_size) == - (rcd->egrbufs.buffers[j].phys + - rcd->egrbufs.buffers[j].len)) { - j++; - offset = 0; - } else { - offset += new_size; - } - } - rcd->egrbufs.rcvtid_size = new_size; - } - } - rcd->egrbufs.numbufs = idx; - rcd->egrbufs.size = alloced_bytes; - - hfi1_cdbg(PROC, - "ctxt%u: Alloced %u rcv tid entries @ %uKB, total %zuKB\n", - rcd->ctxt, rcd->egrbufs.alloced, rcd->egrbufs.rcvtid_size, - rcd->egrbufs.size); - - /* - * Set the contexts rcv array head update threshold to the closest - * power of 2 (so we can use a mask instead of modulo) below half - * the allocated entries. - */ - rcd->egrbufs.threshold = - rounddown_pow_of_two(rcd->egrbufs.alloced / 2); - /* - * Compute the expected RcvArray entry base. This is done after - * allocating the eager buffers in order to maximize the - * expected RcvArray entries for the context. - */ - max_entries = rcd->rcv_array_groups * dd->rcv_entries.group_size; - egrtop = roundup(rcd->egrbufs.alloced, dd->rcv_entries.group_size); - rcd->expected_count = max_entries - egrtop; - if (rcd->expected_count > MAX_TID_PAIR_ENTRIES * 2) - rcd->expected_count = MAX_TID_PAIR_ENTRIES * 2; - - rcd->expected_base = rcd->eager_base + egrtop; - hfi1_cdbg(PROC, "ctxt%u: eager:%u, exp:%u, egrbase:%u, expbase:%u\n", - rcd->ctxt, rcd->egrbufs.alloced, rcd->expected_count, - rcd->eager_base, rcd->expected_base); - - if (!hfi1_rcvbuf_validate(rcd->egrbufs.rcvtid_size, PT_EAGER, &order)) { - hfi1_cdbg(PROC, - "ctxt%u: current Eager buffer size is invalid %u\n", - rcd->ctxt, rcd->egrbufs.rcvtid_size); - ret = -EINVAL; - goto bail; - } - - for (idx = 0; idx < rcd->egrbufs.alloced; idx++) { - hfi1_put_tid(dd, rcd->eager_base + idx, PT_EAGER, - rcd->egrbufs.rcvtids[idx].phys, order); - cond_resched(); - } - goto bail; - -bail_rcvegrbuf_phys: - for (idx = 0; idx < rcd->egrbufs.alloced && - rcd->egrbufs.buffers[idx].addr; - idx++) { - dma_free_coherent(&dd->pcidev->dev, - rcd->egrbufs.buffers[idx].len, - rcd->egrbufs.buffers[idx].addr, - rcd->egrbufs.buffers[idx].phys); - rcd->egrbufs.buffers[idx].addr = NULL; - rcd->egrbufs.buffers[idx].phys = 0; - rcd->egrbufs.buffers[idx].len = 0; - } -bail: - return ret; -} |