2 * This file is part of the Chelsio T4 Ethernet driver for Linux.
4 * Copyright (c) 2003-2014 Chelsio Communications, Inc. All rights reserved.
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
37 #include <linux/bitmap.h>
38 #include <linux/crc32.h>
39 #include <linux/ctype.h>
40 #include <linux/debugfs.h>
41 #include <linux/err.h>
42 #include <linux/etherdevice.h>
43 #include <linux/firmware.h>
45 #include <linux/if_vlan.h>
46 #include <linux/init.h>
47 #include <linux/log2.h>
48 #include <linux/mdio.h>
49 #include <linux/module.h>
50 #include <linux/moduleparam.h>
51 #include <linux/mutex.h>
52 #include <linux/netdevice.h>
53 #include <linux/pci.h>
54 #include <linux/aer.h>
55 #include <linux/rtnetlink.h>
56 #include <linux/sched.h>
57 #include <linux/seq_file.h>
58 #include <linux/sockios.h>
59 #include <linux/vmalloc.h>
60 #include <linux/workqueue.h>
61 #include <net/neighbour.h>
62 #include <net/netevent.h>
63 #include <net/addrconf.h>
64 #include <net/bonding.h>
65 #include <net/addrconf.h>
66 #include <asm/uaccess.h>
70 #include "t4_values.h"
73 #include "t4fw_version.h"
74 #include "cxgb4_dcb.h"
75 #include "cxgb4_debugfs.h"
79 char cxgb4_driver_name[] = KBUILD_MODNAME;
84 #define DRV_VERSION "2.0.0-ko"
85 const char cxgb4_driver_version[] = DRV_VERSION;
86 #define DRV_DESC "Chelsio T4/T5 Network Driver"
88 /* Host shadow copy of ingress filter entry. This is in host native format
89 * and doesn't match the ordering or bit order, etc. of the hardware of the
90 * firmware command. The use of bit-field structure elements is purely to
91 * remind ourselves of the field size limitations and save memory in the case
92 * where the filter table is large.
95 /* Administrative fields for filter.
97 u32 valid:1; /* filter allocated and valid */
98 u32 locked:1; /* filter is administratively locked */
100 u32 pending:1; /* filter action is pending firmware reply */
101 u32 smtidx:8; /* Source MAC Table index for smac */
102 struct l2t_entry *l2t; /* Layer Two Table entry for dmac */
104 /* The filter itself. Most of this is a straight copy of information
105 * provided by the extended ioctl(). Some fields are translated to
106 * internal forms -- for instance the Ingress Queue ID passed in from
107 * the ioctl() is translated into the Absolute Ingress Queue ID.
109 struct ch_filter_specification fs;
112 #define DFLT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | \
113 NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP |\
114 NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)
116 /* Macros needed to support the PCI Device ID Table ...
118 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \
119 static const struct pci_device_id cxgb4_pci_tbl[] = {
120 #define CH_PCI_DEVICE_ID_FUNCTION 0x4
122 /* Include PCI Device IDs for both PF4 and PF0-3 so our PCI probe() routine is
125 #define CH_PCI_DEVICE_ID_FUNCTION2 0x0
127 #define CH_PCI_ID_TABLE_ENTRY(devid) \
128 {PCI_VDEVICE(CHELSIO, (devid)), 4}
130 #define CH_PCI_DEVICE_ID_TABLE_DEFINE_END \
134 #include "t4_pci_id_tbl.h"
136 #define FW4_FNAME "cxgb4/t4fw.bin"
137 #define FW5_FNAME "cxgb4/t5fw.bin"
138 #define FW6_FNAME "cxgb4/t6fw.bin"
139 #define FW4_CFNAME "cxgb4/t4-config.txt"
140 #define FW5_CFNAME "cxgb4/t5-config.txt"
141 #define FW6_CFNAME "cxgb4/t6-config.txt"
142 #define PHY_AQ1202_FIRMWARE "cxgb4/aq1202_fw.cld"
143 #define PHY_BCM84834_FIRMWARE "cxgb4/bcm8483.bin"
144 #define PHY_AQ1202_DEVICEID 0x4409
145 #define PHY_BCM84834_DEVICEID 0x4486
147 MODULE_DESCRIPTION(DRV_DESC);
148 MODULE_AUTHOR("Chelsio Communications");
149 MODULE_LICENSE("Dual BSD/GPL");
150 MODULE_VERSION(DRV_VERSION);
151 MODULE_DEVICE_TABLE(pci, cxgb4_pci_tbl);
152 MODULE_FIRMWARE(FW4_FNAME);
153 MODULE_FIRMWARE(FW5_FNAME);
156 * Normally we're willing to become the firmware's Master PF but will be happy
157 * if another PF has already become the Master and initialized the adapter.
158 * Setting "force_init" will cause this driver to forcibly establish itself as
159 * the Master PF and initialize the adapter.
161 static uint force_init;
163 module_param(force_init, uint, 0644);
164 MODULE_PARM_DESC(force_init, "Forcibly become Master PF and initialize adapter");
167 * Normally if the firmware we connect to has Configuration File support, we
168 * use that and only fall back to the old Driver-based initialization if the
169 * Configuration File fails for some reason. If force_old_init is set, then
170 * we'll always use the old Driver-based initialization sequence.
172 static uint force_old_init;
174 module_param(force_old_init, uint, 0644);
175 MODULE_PARM_DESC(force_old_init, "Force old initialization sequence, deprecated"
178 static int dflt_msg_enable = DFLT_MSG_ENABLE;
180 module_param(dflt_msg_enable, int, 0644);
181 MODULE_PARM_DESC(dflt_msg_enable, "Chelsio T4 default message enable bitmap");
184 * The driver uses the best interrupt scheme available on a platform in the
185 * order MSI-X, MSI, legacy INTx interrupts. This parameter determines which
186 * of these schemes the driver may consider as follows:
188 * msi = 2: choose from among all three options
189 * msi = 1: only consider MSI and INTx interrupts
190 * msi = 0: force INTx interrupts
194 module_param(msi, int, 0644);
195 MODULE_PARM_DESC(msi, "whether to use INTx (0), MSI (1) or MSI-X (2)");
198 * Queue interrupt hold-off timer values. Queues default to the first of these
201 static unsigned int intr_holdoff[SGE_NTIMERS - 1] = { 5, 10, 20, 50, 100 };
203 module_param_array(intr_holdoff, uint, NULL, 0644);
204 MODULE_PARM_DESC(intr_holdoff, "values for queue interrupt hold-off timers "
205 "0..4 in microseconds, deprecated parameter");
207 static unsigned int intr_cnt[SGE_NCOUNTERS - 1] = { 4, 8, 16 };
209 module_param_array(intr_cnt, uint, NULL, 0644);
210 MODULE_PARM_DESC(intr_cnt,
211 "thresholds 1..3 for queue interrupt packet counters, "
212 "deprecated parameter");
215 * Normally we tell the chip to deliver Ingress Packets into our DMA buffers
216 * offset by 2 bytes in order to have the IP headers line up on 4-byte
217 * boundaries. This is a requirement for many architectures which will throw
218 * a machine check fault if an attempt is made to access one of the 4-byte IP
219 * header fields on a non-4-byte boundary. And it's a major performance issue
220 * even on some architectures which allow it like some implementations of the
221 * x86 ISA. However, some architectures don't mind this and for some very
222 * edge-case performance sensitive applications (like forwarding large volumes
223 * of small packets), setting this DMA offset to 0 will decrease the number of
224 * PCI-E Bus transfers enough to measurably affect performance.
226 static int rx_dma_offset = 2;
230 #ifdef CONFIG_PCI_IOV
231 module_param(vf_acls, bool, 0644);
232 MODULE_PARM_DESC(vf_acls, "if set enable virtualization L2 ACL enforcement, "
233 "deprecated parameter");
235 /* Configure the number of PCI-E Virtual Function which are to be instantiated
236 * on SR-IOV Capable Physical Functions.
238 static unsigned int num_vf[NUM_OF_PF_WITH_SRIOV];
240 module_param_array(num_vf, uint, NULL, 0644);
241 MODULE_PARM_DESC(num_vf, "number of VFs for each of PFs 0-3");
244 /* TX Queue select used to determine what algorithm to use for selecting TX
245 * queue. Select between the kernel provided function (select_queue=0) or user
246 * cxgb_select_queue function (select_queue=1)
248 * Default: select_queue=0
250 static int select_queue;
251 module_param(select_queue, int, 0644);
252 MODULE_PARM_DESC(select_queue,
253 "Select between kernel provided method of selecting or driver method of selecting TX queue. Default is kernel method.");
255 static unsigned int tp_vlan_pri_map = HW_TPL_FR_MT_PR_IV_P_FC;
257 module_param(tp_vlan_pri_map, uint, 0644);
258 MODULE_PARM_DESC(tp_vlan_pri_map, "global compressed filter configuration, "
259 "deprecated parameter");
261 static struct dentry *cxgb4_debugfs_root;
263 static LIST_HEAD(adapter_list);
264 static DEFINE_MUTEX(uld_mutex);
265 /* Adapter list to be accessed from atomic context */
266 static LIST_HEAD(adap_rcu_list);
267 static DEFINE_SPINLOCK(adap_rcu_lock);
268 static struct cxgb4_uld_info ulds[CXGB4_ULD_MAX];
269 static const char *uld_str[] = { "RDMA", "iSCSI" };
271 static void link_report(struct net_device *dev)
273 if (!netif_carrier_ok(dev))
274 netdev_info(dev, "link down\n");
276 static const char *fc[] = { "no", "Rx", "Tx", "Tx/Rx" };
278 const char *s = "10Mbps";
279 const struct port_info *p = netdev_priv(dev);
281 switch (p->link_cfg.speed) {
296 netdev_info(dev, "link up, %s, full-duplex, %s PAUSE\n", s,
301 #ifdef CONFIG_CHELSIO_T4_DCB
302 /* Set up/tear down Data Center Bridging Priority mapping for a net device. */
303 static void dcb_tx_queue_prio_enable(struct net_device *dev, int enable)
305 struct port_info *pi = netdev_priv(dev);
306 struct adapter *adap = pi->adapter;
307 struct sge_eth_txq *txq = &adap->sge.ethtxq[pi->first_qset];
310 /* We use a simple mapping of Port TX Queue Index to DCB
311 * Priority when we're enabling DCB.
313 for (i = 0; i < pi->nqsets; i++, txq++) {
317 name = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DMAQ) |
319 FW_PARAMS_PARAM_DMAQ_EQ_DCBPRIO_ETH) |
320 FW_PARAMS_PARAM_YZ_V(txq->q.cntxt_id));
321 value = enable ? i : 0xffffffff;
323 /* Since we can be called while atomic (from "interrupt
324 * level") we need to issue the Set Parameters Commannd
325 * without sleeping (timeout < 0).
327 err = t4_set_params_timeout(adap, adap->mbox, adap->pf, 0, 1,
329 -FW_CMD_MAX_TIMEOUT);
332 dev_err(adap->pdev_dev,
333 "Can't %s DCB Priority on port %d, TX Queue %d: err=%d\n",
334 enable ? "set" : "unset", pi->port_id, i, -err);
336 txq->dcb_prio = value;
339 #endif /* CONFIG_CHELSIO_T4_DCB */
341 void t4_os_link_changed(struct adapter *adapter, int port_id, int link_stat)
343 struct net_device *dev = adapter->port[port_id];
345 /* Skip changes from disabled ports. */
346 if (netif_running(dev) && link_stat != netif_carrier_ok(dev)) {
348 netif_carrier_on(dev);
350 #ifdef CONFIG_CHELSIO_T4_DCB
351 cxgb4_dcb_state_init(dev);
352 dcb_tx_queue_prio_enable(dev, false);
353 #endif /* CONFIG_CHELSIO_T4_DCB */
354 netif_carrier_off(dev);
361 void t4_os_portmod_changed(const struct adapter *adap, int port_id)
363 static const char *mod_str[] = {
364 NULL, "LR", "SR", "ER", "passive DA", "active DA", "LRM"
367 const struct net_device *dev = adap->port[port_id];
368 const struct port_info *pi = netdev_priv(dev);
370 if (pi->mod_type == FW_PORT_MOD_TYPE_NONE)
371 netdev_info(dev, "port module unplugged\n");
372 else if (pi->mod_type < ARRAY_SIZE(mod_str))
373 netdev_info(dev, "%s module inserted\n", mod_str[pi->mod_type]);
377 * Configure the exact and hash address filters to handle a port's multicast
378 * and secondary unicast MAC addresses.
380 static int set_addr_filters(const struct net_device *dev, bool sleep)
388 const struct netdev_hw_addr *ha;
389 int uc_cnt = netdev_uc_count(dev);
390 int mc_cnt = netdev_mc_count(dev);
391 const struct port_info *pi = netdev_priv(dev);
392 unsigned int mb = pi->adapter->pf;
394 /* first do the secondary unicast addresses */
395 netdev_for_each_uc_addr(ha, dev) {
396 addr[naddr++] = ha->addr;
397 if (--uc_cnt == 0 || naddr >= ARRAY_SIZE(addr)) {
398 ret = t4_alloc_mac_filt(pi->adapter, mb, pi->viid, free,
399 naddr, addr, filt_idx, &uhash, sleep);
408 /* next set up the multicast addresses */
409 netdev_for_each_mc_addr(ha, dev) {
410 addr[naddr++] = ha->addr;
411 if (--mc_cnt == 0 || naddr >= ARRAY_SIZE(addr)) {
412 ret = t4_alloc_mac_filt(pi->adapter, mb, pi->viid, free,
413 naddr, addr, filt_idx, &mhash, sleep);
422 return t4_set_addr_hash(pi->adapter, mb, pi->viid, uhash != 0,
423 uhash | mhash, sleep);
426 int dbfifo_int_thresh = 10; /* 10 == 640 entry threshold */
427 module_param(dbfifo_int_thresh, int, 0644);
428 MODULE_PARM_DESC(dbfifo_int_thresh, "doorbell fifo interrupt threshold");
431 * usecs to sleep while draining the dbfifo
433 static int dbfifo_drain_delay = 1000;
434 module_param(dbfifo_drain_delay, int, 0644);
435 MODULE_PARM_DESC(dbfifo_drain_delay,
436 "usecs to sleep while draining the dbfifo");
439 * Set Rx properties of a port, such as promiscruity, address filters, and MTU.
440 * If @mtu is -1 it is left unchanged.
442 static int set_rxmode(struct net_device *dev, int mtu, bool sleep_ok)
445 struct port_info *pi = netdev_priv(dev);
447 ret = set_addr_filters(dev, sleep_ok);
449 ret = t4_set_rxmode(pi->adapter, pi->adapter->pf, pi->viid, mtu,
450 (dev->flags & IFF_PROMISC) ? 1 : 0,
451 (dev->flags & IFF_ALLMULTI) ? 1 : 0, 1, -1,
457 * link_start - enable a port
458 * @dev: the port to enable
460 * Performs the MAC and PHY actions needed to enable a port.
462 static int link_start(struct net_device *dev)
465 struct port_info *pi = netdev_priv(dev);
466 unsigned int mb = pi->adapter->pf;
469 * We do not set address filters and promiscuity here, the stack does
470 * that step explicitly.
472 ret = t4_set_rxmode(pi->adapter, mb, pi->viid, dev->mtu, -1, -1, -1,
473 !!(dev->features & NETIF_F_HW_VLAN_CTAG_RX), true);
475 ret = t4_change_mac(pi->adapter, mb, pi->viid,
476 pi->xact_addr_filt, dev->dev_addr, true,
479 pi->xact_addr_filt = ret;
484 ret = t4_link_l1cfg(pi->adapter, mb, pi->tx_chan,
488 ret = t4_enable_vi_params(pi->adapter, mb, pi->viid, true,
489 true, CXGB4_DCB_ENABLED);
496 int cxgb4_dcb_enabled(const struct net_device *dev)
498 #ifdef CONFIG_CHELSIO_T4_DCB
499 struct port_info *pi = netdev_priv(dev);
501 if (!pi->dcb.enabled)
504 return ((pi->dcb.state == CXGB4_DCB_STATE_FW_ALLSYNCED) ||
505 (pi->dcb.state == CXGB4_DCB_STATE_HOST));
510 EXPORT_SYMBOL(cxgb4_dcb_enabled);
512 #ifdef CONFIG_CHELSIO_T4_DCB
513 /* Handle a Data Center Bridging update message from the firmware. */
514 static void dcb_rpl(struct adapter *adap, const struct fw_port_cmd *pcmd)
516 int port = FW_PORT_CMD_PORTID_G(ntohl(pcmd->op_to_portid));
517 struct net_device *dev = adap->port[port];
518 int old_dcb_enabled = cxgb4_dcb_enabled(dev);
521 cxgb4_dcb_handle_fw_update(adap, pcmd);
522 new_dcb_enabled = cxgb4_dcb_enabled(dev);
524 /* If the DCB has become enabled or disabled on the port then we're
525 * going to need to set up/tear down DCB Priority parameters for the
526 * TX Queues associated with the port.
528 if (new_dcb_enabled != old_dcb_enabled)
529 dcb_tx_queue_prio_enable(dev, new_dcb_enabled);
531 #endif /* CONFIG_CHELSIO_T4_DCB */
533 /* Clear a filter and release any of its resources that we own. This also
534 * clears the filter's "pending" status.
536 static void clear_filter(struct adapter *adap, struct filter_entry *f)
538 /* If the new or old filter have loopback rewriteing rules then we'll
539 * need to free any existing Layer Two Table (L2T) entries of the old
540 * filter rule. The firmware will handle freeing up any Source MAC
541 * Table (SMT) entries used for rewriting Source MAC Addresses in
545 cxgb4_l2t_release(f->l2t);
547 /* The zeroing of the filter rule below clears the filter valid,
548 * pending, locked flags, l2t pointer, etc. so it's all we need for
551 memset(f, 0, sizeof(*f));
554 /* Handle a filter write/deletion reply.
556 static void filter_rpl(struct adapter *adap, const struct cpl_set_tcb_rpl *rpl)
558 unsigned int idx = GET_TID(rpl);
559 unsigned int nidx = idx - adap->tids.ftid_base;
561 struct filter_entry *f;
563 if (idx >= adap->tids.ftid_base && nidx <
564 (adap->tids.nftids + adap->tids.nsftids)) {
566 ret = TCB_COOKIE_G(rpl->cookie);
567 f = &adap->tids.ftid_tab[idx];
569 if (ret == FW_FILTER_WR_FLT_DELETED) {
570 /* Clear the filter when we get confirmation from the
571 * hardware that the filter has been deleted.
573 clear_filter(adap, f);
574 } else if (ret == FW_FILTER_WR_SMT_TBL_FULL) {
575 dev_err(adap->pdev_dev, "filter %u setup failed due to full SMT\n",
577 clear_filter(adap, f);
578 } else if (ret == FW_FILTER_WR_FLT_ADDED) {
579 f->smtidx = (be64_to_cpu(rpl->oldval) >> 24) & 0xff;
580 f->pending = 0; /* asynchronous setup completed */
583 /* Something went wrong. Issue a warning about the
584 * problem and clear everything out.
586 dev_err(adap->pdev_dev, "filter %u setup failed with error %u\n",
588 clear_filter(adap, f);
593 /* Response queue handler for the FW event queue.
595 static int fwevtq_handler(struct sge_rspq *q, const __be64 *rsp,
596 const struct pkt_gl *gl)
598 u8 opcode = ((const struct rss_header *)rsp)->opcode;
600 rsp++; /* skip RSS header */
602 /* FW can send EGR_UPDATEs encapsulated in a CPL_FW4_MSG.
604 if (unlikely(opcode == CPL_FW4_MSG &&
605 ((const struct cpl_fw4_msg *)rsp)->type == FW_TYPE_RSSCPL)) {
607 opcode = ((const struct rss_header *)rsp)->opcode;
609 if (opcode != CPL_SGE_EGR_UPDATE) {
610 dev_err(q->adap->pdev_dev, "unexpected FW4/CPL %#x on FW event queue\n"
616 if (likely(opcode == CPL_SGE_EGR_UPDATE)) {
617 const struct cpl_sge_egr_update *p = (void *)rsp;
618 unsigned int qid = EGR_QID_G(ntohl(p->opcode_qid));
621 txq = q->adap->sge.egr_map[qid - q->adap->sge.egr_start];
623 if ((u8 *)txq < (u8 *)q->adap->sge.ofldtxq) {
624 struct sge_eth_txq *eq;
626 eq = container_of(txq, struct sge_eth_txq, q);
627 netif_tx_wake_queue(eq->txq);
629 struct sge_ofld_txq *oq;
631 oq = container_of(txq, struct sge_ofld_txq, q);
632 tasklet_schedule(&oq->qresume_tsk);
634 } else if (opcode == CPL_FW6_MSG || opcode == CPL_FW4_MSG) {
635 const struct cpl_fw6_msg *p = (void *)rsp;
637 #ifdef CONFIG_CHELSIO_T4_DCB
638 const struct fw_port_cmd *pcmd = (const void *)p->data;
639 unsigned int cmd = FW_CMD_OP_G(ntohl(pcmd->op_to_portid));
640 unsigned int action =
641 FW_PORT_CMD_ACTION_G(ntohl(pcmd->action_to_len16));
643 if (cmd == FW_PORT_CMD &&
644 action == FW_PORT_ACTION_GET_PORT_INFO) {
645 int port = FW_PORT_CMD_PORTID_G(
646 be32_to_cpu(pcmd->op_to_portid));
647 struct net_device *dev = q->adap->port[port];
648 int state_input = ((pcmd->u.info.dcbxdis_pkd &
649 FW_PORT_CMD_DCBXDIS_F)
650 ? CXGB4_DCB_INPUT_FW_DISABLED
651 : CXGB4_DCB_INPUT_FW_ENABLED);
653 cxgb4_dcb_state_fsm(dev, state_input);
656 if (cmd == FW_PORT_CMD &&
657 action == FW_PORT_ACTION_L2_DCB_CFG)
658 dcb_rpl(q->adap, pcmd);
662 t4_handle_fw_rpl(q->adap, p->data);
663 } else if (opcode == CPL_L2T_WRITE_RPL) {
664 const struct cpl_l2t_write_rpl *p = (void *)rsp;
666 do_l2t_write_rpl(q->adap, p);
667 } else if (opcode == CPL_SET_TCB_RPL) {
668 const struct cpl_set_tcb_rpl *p = (void *)rsp;
670 filter_rpl(q->adap, p);
672 dev_err(q->adap->pdev_dev,
673 "unexpected CPL %#x on FW event queue\n", opcode);
679 * uldrx_handler - response queue handler for ULD queues
680 * @q: the response queue that received the packet
681 * @rsp: the response queue descriptor holding the offload message
682 * @gl: the gather list of packet fragments
684 * Deliver an ingress offload packet to a ULD. All processing is done by
685 * the ULD, we just maintain statistics.
687 static int uldrx_handler(struct sge_rspq *q, const __be64 *rsp,
688 const struct pkt_gl *gl)
690 struct sge_ofld_rxq *rxq = container_of(q, struct sge_ofld_rxq, rspq);
692 /* FW can send CPLs encapsulated in a CPL_FW4_MSG.
694 if (((const struct rss_header *)rsp)->opcode == CPL_FW4_MSG &&
695 ((const struct cpl_fw4_msg *)(rsp + 1))->type == FW_TYPE_RSSCPL)
698 if (ulds[q->uld].rx_handler(q->adap->uld_handle[q->uld], rsp, gl)) {
704 else if (gl == CXGB4_MSG_AN)
711 static void disable_msi(struct adapter *adapter)
713 if (adapter->flags & USING_MSIX) {
714 pci_disable_msix(adapter->pdev);
715 adapter->flags &= ~USING_MSIX;
716 } else if (adapter->flags & USING_MSI) {
717 pci_disable_msi(adapter->pdev);
718 adapter->flags &= ~USING_MSI;
723 * Interrupt handler for non-data events used with MSI-X.
725 static irqreturn_t t4_nondata_intr(int irq, void *cookie)
727 struct adapter *adap = cookie;
728 u32 v = t4_read_reg(adap, MYPF_REG(PL_PF_INT_CAUSE_A));
732 t4_write_reg(adap, MYPF_REG(PL_PF_INT_CAUSE_A), v);
734 if (adap->flags & MASTER_PF)
735 t4_slow_intr_handler(adap);
740 * Name the MSI-X interrupts.
742 static void name_msix_vecs(struct adapter *adap)
744 int i, j, msi_idx = 2, n = sizeof(adap->msix_info[0].desc);
746 /* non-data interrupts */
747 snprintf(adap->msix_info[0].desc, n, "%s", adap->port[0]->name);
750 snprintf(adap->msix_info[1].desc, n, "%s-FWeventq",
751 adap->port[0]->name);
753 /* Ethernet queues */
754 for_each_port(adap, j) {
755 struct net_device *d = adap->port[j];
756 const struct port_info *pi = netdev_priv(d);
758 for (i = 0; i < pi->nqsets; i++, msi_idx++)
759 snprintf(adap->msix_info[msi_idx].desc, n, "%s-Rx%d",
764 for_each_ofldrxq(&adap->sge, i)
765 snprintf(adap->msix_info[msi_idx++].desc, n, "%s-ofld%d",
766 adap->port[0]->name, i);
768 for_each_rdmarxq(&adap->sge, i)
769 snprintf(adap->msix_info[msi_idx++].desc, n, "%s-rdma%d",
770 adap->port[0]->name, i);
772 for_each_rdmaciq(&adap->sge, i)
773 snprintf(adap->msix_info[msi_idx++].desc, n, "%s-rdma-ciq%d",
774 adap->port[0]->name, i);
777 static int request_msix_queue_irqs(struct adapter *adap)
779 struct sge *s = &adap->sge;
780 int err, ethqidx, ofldqidx = 0, rdmaqidx = 0, rdmaciqqidx = 0;
783 err = request_irq(adap->msix_info[1].vec, t4_sge_intr_msix, 0,
784 adap->msix_info[1].desc, &s->fw_evtq);
788 for_each_ethrxq(s, ethqidx) {
789 err = request_irq(adap->msix_info[msi_index].vec,
791 adap->msix_info[msi_index].desc,
792 &s->ethrxq[ethqidx].rspq);
797 for_each_ofldrxq(s, ofldqidx) {
798 err = request_irq(adap->msix_info[msi_index].vec,
800 adap->msix_info[msi_index].desc,
801 &s->ofldrxq[ofldqidx].rspq);
806 for_each_rdmarxq(s, rdmaqidx) {
807 err = request_irq(adap->msix_info[msi_index].vec,
809 adap->msix_info[msi_index].desc,
810 &s->rdmarxq[rdmaqidx].rspq);
815 for_each_rdmaciq(s, rdmaciqqidx) {
816 err = request_irq(adap->msix_info[msi_index].vec,
818 adap->msix_info[msi_index].desc,
819 &s->rdmaciq[rdmaciqqidx].rspq);
827 while (--rdmaciqqidx >= 0)
828 free_irq(adap->msix_info[--msi_index].vec,
829 &s->rdmaciq[rdmaciqqidx].rspq);
830 while (--rdmaqidx >= 0)
831 free_irq(adap->msix_info[--msi_index].vec,
832 &s->rdmarxq[rdmaqidx].rspq);
833 while (--ofldqidx >= 0)
834 free_irq(adap->msix_info[--msi_index].vec,
835 &s->ofldrxq[ofldqidx].rspq);
836 while (--ethqidx >= 0)
837 free_irq(adap->msix_info[--msi_index].vec,
838 &s->ethrxq[ethqidx].rspq);
839 free_irq(adap->msix_info[1].vec, &s->fw_evtq);
843 static void free_msix_queue_irqs(struct adapter *adap)
845 int i, msi_index = 2;
846 struct sge *s = &adap->sge;
848 free_irq(adap->msix_info[1].vec, &s->fw_evtq);
849 for_each_ethrxq(s, i)
850 free_irq(adap->msix_info[msi_index++].vec, &s->ethrxq[i].rspq);
851 for_each_ofldrxq(s, i)
852 free_irq(adap->msix_info[msi_index++].vec, &s->ofldrxq[i].rspq);
853 for_each_rdmarxq(s, i)
854 free_irq(adap->msix_info[msi_index++].vec, &s->rdmarxq[i].rspq);
855 for_each_rdmaciq(s, i)
856 free_irq(adap->msix_info[msi_index++].vec, &s->rdmaciq[i].rspq);
860 * cxgb4_write_rss - write the RSS table for a given port
862 * @queues: array of queue indices for RSS
864 * Sets up the portion of the HW RSS table for the port's VI to distribute
865 * packets to the Rx queues in @queues.
866 * Should never be called before setting up sge eth rx queues
868 int cxgb4_write_rss(const struct port_info *pi, const u16 *queues)
872 struct adapter *adapter = pi->adapter;
873 const struct sge_eth_rxq *rxq;
875 rxq = &adapter->sge.ethrxq[pi->first_qset];
876 rss = kmalloc(pi->rss_size * sizeof(u16), GFP_KERNEL);
880 /* map the queue indices to queue ids */
881 for (i = 0; i < pi->rss_size; i++, queues++)
882 rss[i] = rxq[*queues].rspq.abs_id;
884 err = t4_config_rss_range(adapter, adapter->pf, pi->viid, 0,
885 pi->rss_size, rss, pi->rss_size);
886 /* If Tunnel All Lookup isn't specified in the global RSS
887 * Configuration, then we need to specify a default Ingress
888 * Queue for any ingress packets which aren't hashed. We'll
889 * use our first ingress queue ...
892 err = t4_config_vi_rss(adapter, adapter->mbox, pi->viid,
893 FW_RSS_VI_CONFIG_CMD_IP6FOURTUPEN_F |
894 FW_RSS_VI_CONFIG_CMD_IP6TWOTUPEN_F |
895 FW_RSS_VI_CONFIG_CMD_IP4FOURTUPEN_F |
896 FW_RSS_VI_CONFIG_CMD_IP4TWOTUPEN_F |
897 FW_RSS_VI_CONFIG_CMD_UDPEN_F,
904 * setup_rss - configure RSS
907 * Sets up RSS for each port.
909 static int setup_rss(struct adapter *adap)
913 for_each_port(adap, i) {
914 const struct port_info *pi = adap2pinfo(adap, i);
916 /* Fill default values with equal distribution */
917 for (j = 0; j < pi->rss_size; j++)
918 pi->rss[j] = j % pi->nqsets;
920 err = cxgb4_write_rss(pi, pi->rss);
928 * Return the channel of the ingress queue with the given qid.
930 static unsigned int rxq_to_chan(const struct sge *p, unsigned int qid)
932 qid -= p->ingr_start;
933 return netdev2pinfo(p->ingr_map[qid]->netdev)->tx_chan;
937 * Wait until all NAPI handlers are descheduled.
939 static void quiesce_rx(struct adapter *adap)
943 for (i = 0; i < adap->sge.ingr_sz; i++) {
944 struct sge_rspq *q = adap->sge.ingr_map[i];
946 if (q && q->handler) {
947 napi_disable(&q->napi);
949 while (!cxgb_poll_lock_napi(q))
957 /* Disable interrupt and napi handler */
958 static void disable_interrupts(struct adapter *adap)
960 if (adap->flags & FULL_INIT_DONE) {
961 t4_intr_disable(adap);
962 if (adap->flags & USING_MSIX) {
963 free_msix_queue_irqs(adap);
964 free_irq(adap->msix_info[0].vec, adap);
966 free_irq(adap->pdev->irq, adap);
973 * Enable NAPI scheduling and interrupt generation for all Rx queues.
975 static void enable_rx(struct adapter *adap)
979 for (i = 0; i < adap->sge.ingr_sz; i++) {
980 struct sge_rspq *q = adap->sge.ingr_map[i];
985 cxgb_busy_poll_init_lock(q);
986 napi_enable(&q->napi);
988 /* 0-increment GTS to start the timer and enable interrupts */
989 t4_write_reg(adap, MYPF_REG(SGE_PF_GTS_A),
990 SEINTARM_V(q->intr_params) |
991 INGRESSQID_V(q->cntxt_id));
995 static int alloc_ofld_rxqs(struct adapter *adap, struct sge_ofld_rxq *q,
996 unsigned int nq, unsigned int per_chan, int msi_idx,
1001 for (i = 0; i < nq; i++, q++) {
1004 err = t4_sge_alloc_rxq(adap, &q->rspq, false,
1005 adap->port[i / per_chan],
1006 msi_idx, q->fl.size ? &q->fl : NULL,
1010 memset(&q->stats, 0, sizeof(q->stats));
1012 ids[i] = q->rspq.abs_id;
1018 * setup_sge_queues - configure SGE Tx/Rx/response queues
1019 * @adap: the adapter
1021 * Determines how many sets of SGE queues to use and initializes them.
1022 * We support multiple queue sets per port if we have MSI-X, otherwise
1023 * just one queue set per port.
1025 static int setup_sge_queues(struct adapter *adap)
1027 int err, msi_idx, i, j;
1028 struct sge *s = &adap->sge;
1030 bitmap_zero(s->starving_fl, s->egr_sz);
1031 bitmap_zero(s->txq_maperr, s->egr_sz);
1033 if (adap->flags & USING_MSIX)
1034 msi_idx = 1; /* vector 0 is for non-queue interrupts */
1036 err = t4_sge_alloc_rxq(adap, &s->intrq, false, adap->port[0], 0,
1040 msi_idx = -((int)s->intrq.abs_id + 1);
1043 /* NOTE: If you add/delete any Ingress/Egress Queue allocations in here,
1044 * don't forget to update the following which need to be
1045 * synchronized to and changes here.
1047 * 1. The calculations of MAX_INGQ in cxgb4.h.
1049 * 2. Update enable_msix/name_msix_vecs/request_msix_queue_irqs
1050 * to accommodate any new/deleted Ingress Queues
1051 * which need MSI-X Vectors.
1053 * 3. Update sge_qinfo_show() to include information on the
1054 * new/deleted queues.
1056 err = t4_sge_alloc_rxq(adap, &s->fw_evtq, true, adap->port[0],
1057 msi_idx, NULL, fwevtq_handler, -1);
1059 freeout: t4_free_sge_resources(adap);
1063 for_each_port(adap, i) {
1064 struct net_device *dev = adap->port[i];
1065 struct port_info *pi = netdev_priv(dev);
1066 struct sge_eth_rxq *q = &s->ethrxq[pi->first_qset];
1067 struct sge_eth_txq *t = &s->ethtxq[pi->first_qset];
1069 for (j = 0; j < pi->nqsets; j++, q++) {
1072 err = t4_sge_alloc_rxq(adap, &q->rspq, false, dev,
1075 t4_get_mps_bg_map(adap,
1080 memset(&q->stats, 0, sizeof(q->stats));
1082 for (j = 0; j < pi->nqsets; j++, t++) {
1083 err = t4_sge_alloc_eth_txq(adap, t, dev,
1084 netdev_get_tx_queue(dev, j),
1085 s->fw_evtq.cntxt_id);
1091 j = s->ofldqsets / adap->params.nports; /* ofld queues per channel */
1092 for_each_ofldrxq(s, i) {
1093 err = t4_sge_alloc_ofld_txq(adap, &s->ofldtxq[i],
1095 s->fw_evtq.cntxt_id);
1100 #define ALLOC_OFLD_RXQS(firstq, nq, per_chan, ids) do { \
1101 err = alloc_ofld_rxqs(adap, firstq, nq, per_chan, msi_idx, ids); \
1108 ALLOC_OFLD_RXQS(s->ofldrxq, s->ofldqsets, j, s->ofld_rxq);
1109 ALLOC_OFLD_RXQS(s->rdmarxq, s->rdmaqs, 1, s->rdma_rxq);
1110 j = s->rdmaciqs / adap->params.nports; /* rdmaq queues per channel */
1111 ALLOC_OFLD_RXQS(s->rdmaciq, s->rdmaciqs, j, s->rdma_ciq);
1113 #undef ALLOC_OFLD_RXQS
1115 for_each_port(adap, i) {
1117 * Note that ->rdmarxq[i].rspq.cntxt_id below is 0 if we don't
1118 * have RDMA queues, and that's the right value.
1120 err = t4_sge_alloc_ctrl_txq(adap, &s->ctrlq[i], adap->port[i],
1121 s->fw_evtq.cntxt_id,
1122 s->rdmarxq[i].rspq.cntxt_id);
1127 t4_write_reg(adap, is_t4(adap->params.chip) ?
1128 MPS_TRC_RSS_CONTROL_A :
1129 MPS_T5_TRC_RSS_CONTROL_A,
1130 RSSCONTROL_V(netdev2pinfo(adap->port[0])->tx_chan) |
1131 QUEUENUMBER_V(s->ethrxq[0].rspq.abs_id));
1136 * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1137 * The allocated memory is cleared.
1139 void *t4_alloc_mem(size_t size)
1141 void *p = kzalloc(size, GFP_KERNEL | __GFP_NOWARN);
1149 * Free memory allocated through alloc_mem().
1151 void t4_free_mem(void *addr)
1156 /* Send a Work Request to write the filter at a specified index. We construct
1157 * a Firmware Filter Work Request to have the work done and put the indicated
1158 * filter into "pending" mode which will prevent any further actions against
1159 * it till we get a reply from the firmware on the completion status of the
1162 static int set_filter_wr(struct adapter *adapter, int fidx)
1164 struct filter_entry *f = &adapter->tids.ftid_tab[fidx];
1165 struct sk_buff *skb;
1166 struct fw_filter_wr *fwr;
1169 skb = alloc_skb(sizeof(*fwr), GFP_KERNEL);
1173 /* If the new filter requires loopback Destination MAC and/or VLAN
1174 * rewriting then we need to allocate a Layer 2 Table (L2T) entry for
1177 if (f->fs.newdmac || f->fs.newvlan) {
1178 /* allocate L2T entry for new filter */
1179 f->l2t = t4_l2t_alloc_switching(adapter->l2t);
1180 if (f->l2t == NULL) {
1184 if (t4_l2t_set_switching(adapter, f->l2t, f->fs.vlan,
1185 f->fs.eport, f->fs.dmac)) {
1186 cxgb4_l2t_release(f->l2t);
1193 ftid = adapter->tids.ftid_base + fidx;
1195 fwr = (struct fw_filter_wr *)__skb_put(skb, sizeof(*fwr));
1196 memset(fwr, 0, sizeof(*fwr));
1198 /* It would be nice to put most of the following in t4_hw.c but most
1199 * of the work is translating the cxgbtool ch_filter_specification
1200 * into the Work Request and the definition of that structure is
1201 * currently in cxgbtool.h which isn't appropriate to pull into the
1202 * common code. We may eventually try to come up with a more neutral
1203 * filter specification structure but for now it's easiest to simply
1204 * put this fairly direct code in line ...
1206 fwr->op_pkd = htonl(FW_WR_OP_V(FW_FILTER_WR));
1207 fwr->len16_pkd = htonl(FW_WR_LEN16_V(sizeof(*fwr)/16));
1209 htonl(FW_FILTER_WR_TID_V(ftid) |
1210 FW_FILTER_WR_RQTYPE_V(f->fs.type) |
1211 FW_FILTER_WR_NOREPLY_V(0) |
1212 FW_FILTER_WR_IQ_V(f->fs.iq));
1213 fwr->del_filter_to_l2tix =
1214 htonl(FW_FILTER_WR_RPTTID_V(f->fs.rpttid) |
1215 FW_FILTER_WR_DROP_V(f->fs.action == FILTER_DROP) |
1216 FW_FILTER_WR_DIRSTEER_V(f->fs.dirsteer) |
1217 FW_FILTER_WR_MASKHASH_V(f->fs.maskhash) |
1218 FW_FILTER_WR_DIRSTEERHASH_V(f->fs.dirsteerhash) |
1219 FW_FILTER_WR_LPBK_V(f->fs.action == FILTER_SWITCH) |
1220 FW_FILTER_WR_DMAC_V(f->fs.newdmac) |
1221 FW_FILTER_WR_SMAC_V(f->fs.newsmac) |
1222 FW_FILTER_WR_INSVLAN_V(f->fs.newvlan == VLAN_INSERT ||
1223 f->fs.newvlan == VLAN_REWRITE) |
1224 FW_FILTER_WR_RMVLAN_V(f->fs.newvlan == VLAN_REMOVE ||
1225 f->fs.newvlan == VLAN_REWRITE) |
1226 FW_FILTER_WR_HITCNTS_V(f->fs.hitcnts) |
1227 FW_FILTER_WR_TXCHAN_V(f->fs.eport) |
1228 FW_FILTER_WR_PRIO_V(f->fs.prio) |
1229 FW_FILTER_WR_L2TIX_V(f->l2t ? f->l2t->idx : 0));
1230 fwr->ethtype = htons(f->fs.val.ethtype);
1231 fwr->ethtypem = htons(f->fs.mask.ethtype);
1232 fwr->frag_to_ovlan_vldm =
1233 (FW_FILTER_WR_FRAG_V(f->fs.val.frag) |
1234 FW_FILTER_WR_FRAGM_V(f->fs.mask.frag) |
1235 FW_FILTER_WR_IVLAN_VLD_V(f->fs.val.ivlan_vld) |
1236 FW_FILTER_WR_OVLAN_VLD_V(f->fs.val.ovlan_vld) |
1237 FW_FILTER_WR_IVLAN_VLDM_V(f->fs.mask.ivlan_vld) |
1238 FW_FILTER_WR_OVLAN_VLDM_V(f->fs.mask.ovlan_vld));
1240 fwr->rx_chan_rx_rpl_iq =
1241 htons(FW_FILTER_WR_RX_CHAN_V(0) |
1242 FW_FILTER_WR_RX_RPL_IQ_V(adapter->sge.fw_evtq.abs_id));
1243 fwr->maci_to_matchtypem =
1244 htonl(FW_FILTER_WR_MACI_V(f->fs.val.macidx) |
1245 FW_FILTER_WR_MACIM_V(f->fs.mask.macidx) |
1246 FW_FILTER_WR_FCOE_V(f->fs.val.fcoe) |
1247 FW_FILTER_WR_FCOEM_V(f->fs.mask.fcoe) |
1248 FW_FILTER_WR_PORT_V(f->fs.val.iport) |
1249 FW_FILTER_WR_PORTM_V(f->fs.mask.iport) |
1250 FW_FILTER_WR_MATCHTYPE_V(f->fs.val.matchtype) |
1251 FW_FILTER_WR_MATCHTYPEM_V(f->fs.mask.matchtype));
1252 fwr->ptcl = f->fs.val.proto;
1253 fwr->ptclm = f->fs.mask.proto;
1254 fwr->ttyp = f->fs.val.tos;
1255 fwr->ttypm = f->fs.mask.tos;
1256 fwr->ivlan = htons(f->fs.val.ivlan);
1257 fwr->ivlanm = htons(f->fs.mask.ivlan);
1258 fwr->ovlan = htons(f->fs.val.ovlan);
1259 fwr->ovlanm = htons(f->fs.mask.ovlan);
1260 memcpy(fwr->lip, f->fs.val.lip, sizeof(fwr->lip));
1261 memcpy(fwr->lipm, f->fs.mask.lip, sizeof(fwr->lipm));
1262 memcpy(fwr->fip, f->fs.val.fip, sizeof(fwr->fip));
1263 memcpy(fwr->fipm, f->fs.mask.fip, sizeof(fwr->fipm));
1264 fwr->lp = htons(f->fs.val.lport);
1265 fwr->lpm = htons(f->fs.mask.lport);
1266 fwr->fp = htons(f->fs.val.fport);
1267 fwr->fpm = htons(f->fs.mask.fport);
1269 memcpy(fwr->sma, f->fs.smac, sizeof(fwr->sma));
1271 /* Mark the filter as "pending" and ship off the Filter Work Request.
1272 * When we get the Work Request Reply we'll clear the pending status.
1275 set_wr_txq(skb, CPL_PRIORITY_CONTROL, f->fs.val.iport & 0x3);
1276 t4_ofld_send(adapter, skb);
1280 /* Delete the filter at a specified index.
1282 static int del_filter_wr(struct adapter *adapter, int fidx)
1284 struct filter_entry *f = &adapter->tids.ftid_tab[fidx];
1285 struct sk_buff *skb;
1286 struct fw_filter_wr *fwr;
1287 unsigned int len, ftid;
1290 ftid = adapter->tids.ftid_base + fidx;
1292 skb = alloc_skb(len, GFP_KERNEL);
1296 fwr = (struct fw_filter_wr *)__skb_put(skb, len);
1297 t4_mk_filtdelwr(ftid, fwr, adapter->sge.fw_evtq.abs_id);
1299 /* Mark the filter as "pending" and ship off the Filter Work Request.
1300 * When we get the Work Request Reply we'll clear the pending status.
1303 t4_mgmt_tx(adapter, skb);
1307 static u16 cxgb_select_queue(struct net_device *dev, struct sk_buff *skb,
1308 void *accel_priv, select_queue_fallback_t fallback)
1312 #ifdef CONFIG_CHELSIO_T4_DCB
1313 /* If a Data Center Bridging has been successfully negotiated on this
1314 * link then we'll use the skb's priority to map it to a TX Queue.
1315 * The skb's priority is determined via the VLAN Tag Priority Code
1318 if (cxgb4_dcb_enabled(dev)) {
1322 err = vlan_get_tag(skb, &vlan_tci);
1323 if (unlikely(err)) {
1324 if (net_ratelimit())
1326 "TX Packet without VLAN Tag on DCB Link\n");
1329 txq = (vlan_tci & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
1330 #ifdef CONFIG_CHELSIO_T4_FCOE
1331 if (skb->protocol == htons(ETH_P_FCOE))
1332 txq = skb->priority & 0x7;
1333 #endif /* CONFIG_CHELSIO_T4_FCOE */
1337 #endif /* CONFIG_CHELSIO_T4_DCB */
1340 txq = (skb_rx_queue_recorded(skb)
1341 ? skb_get_rx_queue(skb)
1342 : smp_processor_id());
1344 while (unlikely(txq >= dev->real_num_tx_queues))
1345 txq -= dev->real_num_tx_queues;
1350 return fallback(dev, skb) % dev->real_num_tx_queues;
1353 static int closest_timer(const struct sge *s, int time)
1355 int i, delta, match = 0, min_delta = INT_MAX;
1357 for (i = 0; i < ARRAY_SIZE(s->timer_val); i++) {
1358 delta = time - s->timer_val[i];
1361 if (delta < min_delta) {
1369 static int closest_thres(const struct sge *s, int thres)
1371 int i, delta, match = 0, min_delta = INT_MAX;
1373 for (i = 0; i < ARRAY_SIZE(s->counter_val); i++) {
1374 delta = thres - s->counter_val[i];
1377 if (delta < min_delta) {
1386 * cxgb4_set_rspq_intr_params - set a queue's interrupt holdoff parameters
1388 * @us: the hold-off time in us, or 0 to disable timer
1389 * @cnt: the hold-off packet count, or 0 to disable counter
1391 * Sets an Rx queue's interrupt hold-off time and packet count. At least
1392 * one of the two needs to be enabled for the queue to generate interrupts.
1394 int cxgb4_set_rspq_intr_params(struct sge_rspq *q,
1395 unsigned int us, unsigned int cnt)
1397 struct adapter *adap = q->adap;
1399 if ((us | cnt) == 0)
1406 new_idx = closest_thres(&adap->sge, cnt);
1407 if (q->desc && q->pktcnt_idx != new_idx) {
1408 /* the queue has already been created, update it */
1409 v = FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DMAQ) |
1410 FW_PARAMS_PARAM_X_V(
1411 FW_PARAMS_PARAM_DMAQ_IQ_INTCNTTHRESH) |
1412 FW_PARAMS_PARAM_YZ_V(q->cntxt_id);
1413 err = t4_set_params(adap, adap->mbox, adap->pf, 0, 1,
1418 q->pktcnt_idx = new_idx;
1421 us = us == 0 ? 6 : closest_timer(&adap->sge, us);
1422 q->intr_params = QINTR_TIMER_IDX_V(us) | QINTR_CNT_EN_V(cnt > 0);
1426 static int cxgb_set_features(struct net_device *dev, netdev_features_t features)
1428 const struct port_info *pi = netdev_priv(dev);
1429 netdev_features_t changed = dev->features ^ features;
1432 if (!(changed & NETIF_F_HW_VLAN_CTAG_RX))
1435 err = t4_set_rxmode(pi->adapter, pi->adapter->pf, pi->viid, -1,
1437 !!(features & NETIF_F_HW_VLAN_CTAG_RX), true);
1439 dev->features = features ^ NETIF_F_HW_VLAN_CTAG_RX;
1443 static int setup_debugfs(struct adapter *adap)
1445 if (IS_ERR_OR_NULL(adap->debugfs_root))
1448 #ifdef CONFIG_DEBUG_FS
1449 t4_setup_debugfs(adap);
1455 * upper-layer driver support
1459 * Allocate an active-open TID and set it to the supplied value.
1461 int cxgb4_alloc_atid(struct tid_info *t, void *data)
1465 spin_lock_bh(&t->atid_lock);
1467 union aopen_entry *p = t->afree;
1469 atid = (p - t->atid_tab) + t->atid_base;
1474 spin_unlock_bh(&t->atid_lock);
1477 EXPORT_SYMBOL(cxgb4_alloc_atid);
1480 * Release an active-open TID.
1482 void cxgb4_free_atid(struct tid_info *t, unsigned int atid)
1484 union aopen_entry *p = &t->atid_tab[atid - t->atid_base];
1486 spin_lock_bh(&t->atid_lock);
1490 spin_unlock_bh(&t->atid_lock);
1492 EXPORT_SYMBOL(cxgb4_free_atid);
1495 * Allocate a server TID and set it to the supplied value.
1497 int cxgb4_alloc_stid(struct tid_info *t, int family, void *data)
1501 spin_lock_bh(&t->stid_lock);
1502 if (family == PF_INET) {
1503 stid = find_first_zero_bit(t->stid_bmap, t->nstids);
1504 if (stid < t->nstids)
1505 __set_bit(stid, t->stid_bmap);
1509 stid = bitmap_find_free_region(t->stid_bmap, t->nstids, 2);
1514 t->stid_tab[stid].data = data;
1515 stid += t->stid_base;
1516 /* IPv6 requires max of 520 bits or 16 cells in TCAM
1517 * This is equivalent to 4 TIDs. With CLIP enabled it
1520 if (family == PF_INET)
1523 t->stids_in_use += 4;
1525 spin_unlock_bh(&t->stid_lock);
1528 EXPORT_SYMBOL(cxgb4_alloc_stid);
1530 /* Allocate a server filter TID and set it to the supplied value.
1532 int cxgb4_alloc_sftid(struct tid_info *t, int family, void *data)
1536 spin_lock_bh(&t->stid_lock);
1537 if (family == PF_INET) {
1538 stid = find_next_zero_bit(t->stid_bmap,
1539 t->nstids + t->nsftids, t->nstids);
1540 if (stid < (t->nstids + t->nsftids))
1541 __set_bit(stid, t->stid_bmap);
1548 t->stid_tab[stid].data = data;
1550 stid += t->sftid_base;
1553 spin_unlock_bh(&t->stid_lock);
1556 EXPORT_SYMBOL(cxgb4_alloc_sftid);
1558 /* Release a server TID.
1560 void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family)
1562 /* Is it a server filter TID? */
1563 if (t->nsftids && (stid >= t->sftid_base)) {
1564 stid -= t->sftid_base;
1567 stid -= t->stid_base;
1570 spin_lock_bh(&t->stid_lock);
1571 if (family == PF_INET)
1572 __clear_bit(stid, t->stid_bmap);
1574 bitmap_release_region(t->stid_bmap, stid, 2);
1575 t->stid_tab[stid].data = NULL;
1576 if (stid < t->nstids) {
1577 if (family == PF_INET)
1580 t->stids_in_use -= 4;
1584 spin_unlock_bh(&t->stid_lock);
1586 EXPORT_SYMBOL(cxgb4_free_stid);
1589 * Populate a TID_RELEASE WR. Caller must properly size the skb.
1591 static void mk_tid_release(struct sk_buff *skb, unsigned int chan,
1594 struct cpl_tid_release *req;
1596 set_wr_txq(skb, CPL_PRIORITY_SETUP, chan);
1597 req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
1598 INIT_TP_WR(req, tid);
1599 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
1603 * Queue a TID release request and if necessary schedule a work queue to
1606 static void cxgb4_queue_tid_release(struct tid_info *t, unsigned int chan,
1609 void **p = &t->tid_tab[tid];
1610 struct adapter *adap = container_of(t, struct adapter, tids);
1612 spin_lock_bh(&adap->tid_release_lock);
1613 *p = adap->tid_release_head;
1614 /* Low 2 bits encode the Tx channel number */
1615 adap->tid_release_head = (void **)((uintptr_t)p | chan);
1616 if (!adap->tid_release_task_busy) {
1617 adap->tid_release_task_busy = true;
1618 queue_work(adap->workq, &adap->tid_release_task);
1620 spin_unlock_bh(&adap->tid_release_lock);
1624 * Process the list of pending TID release requests.
1626 static void process_tid_release_list(struct work_struct *work)
1628 struct sk_buff *skb;
1629 struct adapter *adap;
1631 adap = container_of(work, struct adapter, tid_release_task);
1633 spin_lock_bh(&adap->tid_release_lock);
1634 while (adap->tid_release_head) {
1635 void **p = adap->tid_release_head;
1636 unsigned int chan = (uintptr_t)p & 3;
1637 p = (void *)p - chan;
1639 adap->tid_release_head = *p;
1641 spin_unlock_bh(&adap->tid_release_lock);
1643 while (!(skb = alloc_skb(sizeof(struct cpl_tid_release),
1645 schedule_timeout_uninterruptible(1);
1647 mk_tid_release(skb, chan, p - adap->tids.tid_tab);
1648 t4_ofld_send(adap, skb);
1649 spin_lock_bh(&adap->tid_release_lock);
1651 adap->tid_release_task_busy = false;
1652 spin_unlock_bh(&adap->tid_release_lock);
1656 * Release a TID and inform HW. If we are unable to allocate the release
1657 * message we defer to a work queue.
1659 void cxgb4_remove_tid(struct tid_info *t, unsigned int chan, unsigned int tid)
1661 struct sk_buff *skb;
1662 struct adapter *adap = container_of(t, struct adapter, tids);
1664 WARN_ON(tid >= t->ntids);
1666 if (t->tid_tab[tid]) {
1667 t->tid_tab[tid] = NULL;
1668 if (t->hash_base && (tid >= t->hash_base))
1669 atomic_dec(&t->hash_tids_in_use);
1671 atomic_dec(&t->tids_in_use);
1674 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
1676 mk_tid_release(skb, chan, tid);
1677 t4_ofld_send(adap, skb);
1679 cxgb4_queue_tid_release(t, chan, tid);
1681 EXPORT_SYMBOL(cxgb4_remove_tid);
1684 * Allocate and initialize the TID tables. Returns 0 on success.
1686 static int tid_init(struct tid_info *t)
1689 unsigned int stid_bmap_size;
1690 unsigned int natids = t->natids;
1691 struct adapter *adap = container_of(t, struct adapter, tids);
1693 stid_bmap_size = BITS_TO_LONGS(t->nstids + t->nsftids);
1694 size = t->ntids * sizeof(*t->tid_tab) +
1695 natids * sizeof(*t->atid_tab) +
1696 t->nstids * sizeof(*t->stid_tab) +
1697 t->nsftids * sizeof(*t->stid_tab) +
1698 stid_bmap_size * sizeof(long) +
1699 t->nftids * sizeof(*t->ftid_tab) +
1700 t->nsftids * sizeof(*t->ftid_tab);
1702 t->tid_tab = t4_alloc_mem(size);
1706 t->atid_tab = (union aopen_entry *)&t->tid_tab[t->ntids];
1707 t->stid_tab = (struct serv_entry *)&t->atid_tab[natids];
1708 t->stid_bmap = (unsigned long *)&t->stid_tab[t->nstids + t->nsftids];
1709 t->ftid_tab = (struct filter_entry *)&t->stid_bmap[stid_bmap_size];
1710 spin_lock_init(&t->stid_lock);
1711 spin_lock_init(&t->atid_lock);
1713 t->stids_in_use = 0;
1714 t->sftids_in_use = 0;
1716 t->atids_in_use = 0;
1717 atomic_set(&t->tids_in_use, 0);
1718 atomic_set(&t->hash_tids_in_use, 0);
1720 /* Setup the free list for atid_tab and clear the stid bitmap. */
1723 t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1724 t->afree = t->atid_tab;
1726 bitmap_zero(t->stid_bmap, t->nstids + t->nsftids);
1727 /* Reserve stid 0 for T4/T5 adapters */
1728 if (!t->stid_base &&
1729 (CHELSIO_CHIP_VERSION(adap->params.chip) <= CHELSIO_T5))
1730 __set_bit(0, t->stid_bmap);
1736 * cxgb4_create_server - create an IP server
1738 * @stid: the server TID
1739 * @sip: local IP address to bind server to
1740 * @sport: the server's TCP port
1741 * @queue: queue to direct messages from this server to
1743 * Create an IP server for the given port and address.
1744 * Returns <0 on error and one of the %NET_XMIT_* values on success.
1746 int cxgb4_create_server(const struct net_device *dev, unsigned int stid,
1747 __be32 sip, __be16 sport, __be16 vlan,
1751 struct sk_buff *skb;
1752 struct adapter *adap;
1753 struct cpl_pass_open_req *req;
1756 skb = alloc_skb(sizeof(*req), GFP_KERNEL);
1760 adap = netdev2adap(dev);
1761 req = (struct cpl_pass_open_req *)__skb_put(skb, sizeof(*req));
1763 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, stid));
1764 req->local_port = sport;
1765 req->peer_port = htons(0);
1766 req->local_ip = sip;
1767 req->peer_ip = htonl(0);
1768 chan = rxq_to_chan(&adap->sge, queue);
1769 req->opt0 = cpu_to_be64(TX_CHAN_V(chan));
1770 req->opt1 = cpu_to_be64(CONN_POLICY_V(CPL_CONN_POLICY_ASK) |
1771 SYN_RSS_ENABLE_F | SYN_RSS_QUEUE_V(queue));
1772 ret = t4_mgmt_tx(adap, skb);
1773 return net_xmit_eval(ret);
1775 EXPORT_SYMBOL(cxgb4_create_server);
1777 /* cxgb4_create_server6 - create an IPv6 server
1779 * @stid: the server TID
1780 * @sip: local IPv6 address to bind server to
1781 * @sport: the server's TCP port
1782 * @queue: queue to direct messages from this server to
1784 * Create an IPv6 server for the given port and address.
1785 * Returns <0 on error and one of the %NET_XMIT_* values on success.
1787 int cxgb4_create_server6(const struct net_device *dev, unsigned int stid,
1788 const struct in6_addr *sip, __be16 sport,
1792 struct sk_buff *skb;
1793 struct adapter *adap;
1794 struct cpl_pass_open_req6 *req;
1797 skb = alloc_skb(sizeof(*req), GFP_KERNEL);
1801 adap = netdev2adap(dev);
1802 req = (struct cpl_pass_open_req6 *)__skb_put(skb, sizeof(*req));
1804 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ6, stid));
1805 req->local_port = sport;
1806 req->peer_port = htons(0);
1807 req->local_ip_hi = *(__be64 *)(sip->s6_addr);
1808 req->local_ip_lo = *(__be64 *)(sip->s6_addr + 8);
1809 req->peer_ip_hi = cpu_to_be64(0);
1810 req->peer_ip_lo = cpu_to_be64(0);
1811 chan = rxq_to_chan(&adap->sge, queue);
1812 req->opt0 = cpu_to_be64(TX_CHAN_V(chan));
1813 req->opt1 = cpu_to_be64(CONN_POLICY_V(CPL_CONN_POLICY_ASK) |
1814 SYN_RSS_ENABLE_F | SYN_RSS_QUEUE_V(queue));
1815 ret = t4_mgmt_tx(adap, skb);
1816 return net_xmit_eval(ret);
1818 EXPORT_SYMBOL(cxgb4_create_server6);
1820 int cxgb4_remove_server(const struct net_device *dev, unsigned int stid,
1821 unsigned int queue, bool ipv6)
1823 struct sk_buff *skb;
1824 struct adapter *adap;
1825 struct cpl_close_listsvr_req *req;
1828 adap = netdev2adap(dev);
1830 skb = alloc_skb(sizeof(*req), GFP_KERNEL);
1834 req = (struct cpl_close_listsvr_req *)__skb_put(skb, sizeof(*req));
1836 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_CLOSE_LISTSRV_REQ, stid));
1837 req->reply_ctrl = htons(NO_REPLY_V(0) | (ipv6 ? LISTSVR_IPV6_V(1) :
1838 LISTSVR_IPV6_V(0)) | QUEUENO_V(queue));
1839 ret = t4_mgmt_tx(adap, skb);
1840 return net_xmit_eval(ret);
1842 EXPORT_SYMBOL(cxgb4_remove_server);
1845 * cxgb4_best_mtu - find the entry in the MTU table closest to an MTU
1846 * @mtus: the HW MTU table
1847 * @mtu: the target MTU
1848 * @idx: index of selected entry in the MTU table
1850 * Returns the index and the value in the HW MTU table that is closest to
1851 * but does not exceed @mtu, unless @mtu is smaller than any value in the
1852 * table, in which case that smallest available value is selected.
1854 unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu,
1859 while (i < NMTUS - 1 && mtus[i + 1] <= mtu)
1865 EXPORT_SYMBOL(cxgb4_best_mtu);
1868 * cxgb4_best_aligned_mtu - find best MTU, [hopefully] data size aligned
1869 * @mtus: the HW MTU table
1870 * @header_size: Header Size
1871 * @data_size_max: maximum Data Segment Size
1872 * @data_size_align: desired Data Segment Size Alignment (2^N)
1873 * @mtu_idxp: HW MTU Table Index return value pointer (possibly NULL)
1875 * Similar to cxgb4_best_mtu() but instead of searching the Hardware
1876 * MTU Table based solely on a Maximum MTU parameter, we break that
1877 * parameter up into a Header Size and Maximum Data Segment Size, and
1878 * provide a desired Data Segment Size Alignment. If we find an MTU in
1879 * the Hardware MTU Table which will result in a Data Segment Size with
1880 * the requested alignment _and_ that MTU isn't "too far" from the
1881 * closest MTU, then we'll return that rather than the closest MTU.
1883 unsigned int cxgb4_best_aligned_mtu(const unsigned short *mtus,
1884 unsigned short header_size,
1885 unsigned short data_size_max,
1886 unsigned short data_size_align,
1887 unsigned int *mtu_idxp)
1889 unsigned short max_mtu = header_size + data_size_max;
1890 unsigned short data_size_align_mask = data_size_align - 1;
1891 int mtu_idx, aligned_mtu_idx;
1893 /* Scan the MTU Table till we find an MTU which is larger than our
1894 * Maximum MTU or we reach the end of the table. Along the way,
1895 * record the last MTU found, if any, which will result in a Data
1896 * Segment Length matching the requested alignment.
1898 for (mtu_idx = 0, aligned_mtu_idx = -1; mtu_idx < NMTUS; mtu_idx++) {
1899 unsigned short data_size = mtus[mtu_idx] - header_size;
1901 /* If this MTU minus the Header Size would result in a
1902 * Data Segment Size of the desired alignment, remember it.
1904 if ((data_size & data_size_align_mask) == 0)
1905 aligned_mtu_idx = mtu_idx;
1907 /* If we're not at the end of the Hardware MTU Table and the
1908 * next element is larger than our Maximum MTU, drop out of
1911 if (mtu_idx+1 < NMTUS && mtus[mtu_idx+1] > max_mtu)
1915 /* If we fell out of the loop because we ran to the end of the table,
1916 * then we just have to use the last [largest] entry.
1918 if (mtu_idx == NMTUS)
1921 /* If we found an MTU which resulted in the requested Data Segment
1922 * Length alignment and that's "not far" from the largest MTU which is
1923 * less than or equal to the maximum MTU, then use that.
1925 if (aligned_mtu_idx >= 0 &&
1926 mtu_idx - aligned_mtu_idx <= 1)
1927 mtu_idx = aligned_mtu_idx;
1929 /* If the caller has passed in an MTU Index pointer, pass the
1930 * MTU Index back. Return the MTU value.
1933 *mtu_idxp = mtu_idx;
1934 return mtus[mtu_idx];
1936 EXPORT_SYMBOL(cxgb4_best_aligned_mtu);
1939 * cxgb4_port_chan - get the HW channel of a port
1940 * @dev: the net device for the port
1942 * Return the HW Tx channel of the given port.
1944 unsigned int cxgb4_port_chan(const struct net_device *dev)
1946 return netdev2pinfo(dev)->tx_chan;
1948 EXPORT_SYMBOL(cxgb4_port_chan);
1950 unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo)
1952 struct adapter *adap = netdev2adap(dev);
1953 u32 v1, v2, lp_count, hp_count;
1955 v1 = t4_read_reg(adap, SGE_DBFIFO_STATUS_A);
1956 v2 = t4_read_reg(adap, SGE_DBFIFO_STATUS2_A);
1957 if (is_t4(adap->params.chip)) {
1958 lp_count = LP_COUNT_G(v1);
1959 hp_count = HP_COUNT_G(v1);
1961 lp_count = LP_COUNT_T5_G(v1);
1962 hp_count = HP_COUNT_T5_G(v2);
1964 return lpfifo ? lp_count : hp_count;
1966 EXPORT_SYMBOL(cxgb4_dbfifo_count);
1969 * cxgb4_port_viid - get the VI id of a port
1970 * @dev: the net device for the port
1972 * Return the VI id of the given port.
1974 unsigned int cxgb4_port_viid(const struct net_device *dev)
1976 return netdev2pinfo(dev)->viid;
1978 EXPORT_SYMBOL(cxgb4_port_viid);
1981 * cxgb4_port_idx - get the index of a port
1982 * @dev: the net device for the port
1984 * Return the index of the given port.
1986 unsigned int cxgb4_port_idx(const struct net_device *dev)
1988 return netdev2pinfo(dev)->port_id;
1990 EXPORT_SYMBOL(cxgb4_port_idx);
1992 void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4,
1993 struct tp_tcp_stats *v6)
1995 struct adapter *adap = pci_get_drvdata(pdev);
1997 spin_lock(&adap->stats_lock);
1998 t4_tp_get_tcp_stats(adap, v4, v6);
1999 spin_unlock(&adap->stats_lock);
2001 EXPORT_SYMBOL(cxgb4_get_tcp_stats);
2003 void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask,
2004 const unsigned int *pgsz_order)
2006 struct adapter *adap = netdev2adap(dev);
2008 t4_write_reg(adap, ULP_RX_ISCSI_TAGMASK_A, tag_mask);
2009 t4_write_reg(adap, ULP_RX_ISCSI_PSZ_A, HPZ0_V(pgsz_order[0]) |
2010 HPZ1_V(pgsz_order[1]) | HPZ2_V(pgsz_order[2]) |
2011 HPZ3_V(pgsz_order[3]));
2013 EXPORT_SYMBOL(cxgb4_iscsi_init);
2015 int cxgb4_flush_eq_cache(struct net_device *dev)
2017 struct adapter *adap = netdev2adap(dev);
2019 return t4_sge_ctxt_flush(adap, adap->mbox);
2021 EXPORT_SYMBOL(cxgb4_flush_eq_cache);
2023 static int read_eq_indices(struct adapter *adap, u16 qid, u16 *pidx, u16 *cidx)
2025 u32 addr = t4_read_reg(adap, SGE_DBQ_CTXT_BADDR_A) + 24 * qid + 8;
2029 spin_lock(&adap->win0_lock);
2030 ret = t4_memory_rw(adap, 0, MEM_EDC0, addr,
2031 sizeof(indices), (__be32 *)&indices,
2033 spin_unlock(&adap->win0_lock);
2035 *cidx = (be64_to_cpu(indices) >> 25) & 0xffff;
2036 *pidx = (be64_to_cpu(indices) >> 9) & 0xffff;
2041 int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx,
2044 struct adapter *adap = netdev2adap(dev);
2045 u16 hw_pidx, hw_cidx;
2048 ret = read_eq_indices(adap, qid, &hw_pidx, &hw_cidx);
2052 if (pidx != hw_pidx) {
2056 if (pidx >= hw_pidx)
2057 delta = pidx - hw_pidx;
2059 delta = size - hw_pidx + pidx;
2061 if (is_t4(adap->params.chip))
2062 val = PIDX_V(delta);
2064 val = PIDX_T5_V(delta);
2066 t4_write_reg(adap, MYPF_REG(SGE_PF_KDOORBELL_A),
2072 EXPORT_SYMBOL(cxgb4_sync_txq_pidx);
2074 int cxgb4_read_tpte(struct net_device *dev, u32 stag, __be32 *tpte)
2076 struct adapter *adap;
2077 u32 offset, memtype, memaddr;
2078 u32 edc0_size, edc1_size, mc0_size, mc1_size, size;
2079 u32 edc0_end, edc1_end, mc0_end, mc1_end;
2082 adap = netdev2adap(dev);
2084 offset = ((stag >> 8) * 32) + adap->vres.stag.start;
2086 /* Figure out where the offset lands in the Memory Type/Address scheme.
2087 * This code assumes that the memory is laid out starting at offset 0
2088 * with no breaks as: EDC0, EDC1, MC0, MC1. All cards have both EDC0
2089 * and EDC1. Some cards will have neither MC0 nor MC1, most cards have
2090 * MC0, and some have both MC0 and MC1.
2092 size = t4_read_reg(adap, MA_EDRAM0_BAR_A);
2093 edc0_size = EDRAM0_SIZE_G(size) << 20;
2094 size = t4_read_reg(adap, MA_EDRAM1_BAR_A);
2095 edc1_size = EDRAM1_SIZE_G(size) << 20;
2096 size = t4_read_reg(adap, MA_EXT_MEMORY0_BAR_A);
2097 mc0_size = EXT_MEM0_SIZE_G(size) << 20;
2099 edc0_end = edc0_size;
2100 edc1_end = edc0_end + edc1_size;
2101 mc0_end = edc1_end + mc0_size;
2103 if (offset < edc0_end) {
2106 } else if (offset < edc1_end) {
2108 memaddr = offset - edc0_end;
2110 if (offset < mc0_end) {
2112 memaddr = offset - edc1_end;
2113 } else if (is_t5(adap->params.chip)) {
2114 size = t4_read_reg(adap, MA_EXT_MEMORY1_BAR_A);
2115 mc1_size = EXT_MEM1_SIZE_G(size) << 20;
2116 mc1_end = mc0_end + mc1_size;
2117 if (offset < mc1_end) {
2119 memaddr = offset - mc0_end;
2121 /* offset beyond the end of any memory */
2125 /* T4/T6 only has a single memory channel */
2130 spin_lock(&adap->win0_lock);
2131 ret = t4_memory_rw(adap, 0, memtype, memaddr, 32, tpte, T4_MEMORY_READ);
2132 spin_unlock(&adap->win0_lock);
2136 dev_err(adap->pdev_dev, "stag %#x, offset %#x out of range\n",
2140 EXPORT_SYMBOL(cxgb4_read_tpte);
2142 u64 cxgb4_read_sge_timestamp(struct net_device *dev)
2145 struct adapter *adap;
2147 adap = netdev2adap(dev);
2148 lo = t4_read_reg(adap, SGE_TIMESTAMP_LO_A);
2149 hi = TSVAL_G(t4_read_reg(adap, SGE_TIMESTAMP_HI_A));
2151 return ((u64)hi << 32) | (u64)lo;
2153 EXPORT_SYMBOL(cxgb4_read_sge_timestamp);
2155 int cxgb4_bar2_sge_qregs(struct net_device *dev,
2157 enum cxgb4_bar2_qtype qtype,
2160 unsigned int *pbar2_qid)
2162 return t4_bar2_sge_qregs(netdev2adap(dev),
2164 (qtype == CXGB4_BAR2_QTYPE_EGRESS
2165 ? T4_BAR2_QTYPE_EGRESS
2166 : T4_BAR2_QTYPE_INGRESS),
2171 EXPORT_SYMBOL(cxgb4_bar2_sge_qregs);
2173 static struct pci_driver cxgb4_driver;
2175 static void check_neigh_update(struct neighbour *neigh)
2177 const struct device *parent;
2178 const struct net_device *netdev = neigh->dev;
2180 if (netdev->priv_flags & IFF_802_1Q_VLAN)
2181 netdev = vlan_dev_real_dev(netdev);
2182 parent = netdev->dev.parent;
2183 if (parent && parent->driver == &cxgb4_driver.driver)
2184 t4_l2t_update(dev_get_drvdata(parent), neigh);
2187 static int netevent_cb(struct notifier_block *nb, unsigned long event,
2191 case NETEVENT_NEIGH_UPDATE:
2192 check_neigh_update(data);
2194 case NETEVENT_REDIRECT:
2201 static bool netevent_registered;
2202 static struct notifier_block cxgb4_netevent_nb = {
2203 .notifier_call = netevent_cb
2206 static void drain_db_fifo(struct adapter *adap, int usecs)
2208 u32 v1, v2, lp_count, hp_count;
2211 v1 = t4_read_reg(adap, SGE_DBFIFO_STATUS_A);
2212 v2 = t4_read_reg(adap, SGE_DBFIFO_STATUS2_A);
2213 if (is_t4(adap->params.chip)) {
2214 lp_count = LP_COUNT_G(v1);
2215 hp_count = HP_COUNT_G(v1);
2217 lp_count = LP_COUNT_T5_G(v1);
2218 hp_count = HP_COUNT_T5_G(v2);
2221 if (lp_count == 0 && hp_count == 0)
2223 set_current_state(TASK_UNINTERRUPTIBLE);
2224 schedule_timeout(usecs_to_jiffies(usecs));
2228 static void disable_txq_db(struct sge_txq *q)
2230 unsigned long flags;
2232 spin_lock_irqsave(&q->db_lock, flags);
2234 spin_unlock_irqrestore(&q->db_lock, flags);
2237 static void enable_txq_db(struct adapter *adap, struct sge_txq *q)
2239 spin_lock_irq(&q->db_lock);
2240 if (q->db_pidx_inc) {
2241 /* Make sure that all writes to the TX descriptors
2242 * are committed before we tell HW about them.
2245 t4_write_reg(adap, MYPF_REG(SGE_PF_KDOORBELL_A),
2246 QID_V(q->cntxt_id) | PIDX_V(q->db_pidx_inc));
2250 spin_unlock_irq(&q->db_lock);
2253 static void disable_dbs(struct adapter *adap)
2257 for_each_ethrxq(&adap->sge, i)
2258 disable_txq_db(&adap->sge.ethtxq[i].q);
2259 for_each_ofldrxq(&adap->sge, i)
2260 disable_txq_db(&adap->sge.ofldtxq[i].q);
2261 for_each_port(adap, i)
2262 disable_txq_db(&adap->sge.ctrlq[i].q);
2265 static void enable_dbs(struct adapter *adap)
2269 for_each_ethrxq(&adap->sge, i)
2270 enable_txq_db(adap, &adap->sge.ethtxq[i].q);
2271 for_each_ofldrxq(&adap->sge, i)
2272 enable_txq_db(adap, &adap->sge.ofldtxq[i].q);
2273 for_each_port(adap, i)
2274 enable_txq_db(adap, &adap->sge.ctrlq[i].q);
2277 static void notify_rdma_uld(struct adapter *adap, enum cxgb4_control cmd)
2279 if (adap->uld_handle[CXGB4_ULD_RDMA])
2280 ulds[CXGB4_ULD_RDMA].control(adap->uld_handle[CXGB4_ULD_RDMA],
2284 static void process_db_full(struct work_struct *work)
2286 struct adapter *adap;
2288 adap = container_of(work, struct adapter, db_full_task);
2290 drain_db_fifo(adap, dbfifo_drain_delay);
2292 notify_rdma_uld(adap, CXGB4_CONTROL_DB_EMPTY);
2293 if (CHELSIO_CHIP_VERSION(adap->params.chip) <= CHELSIO_T5)
2294 t4_set_reg_field(adap, SGE_INT_ENABLE3_A,
2295 DBFIFO_HP_INT_F | DBFIFO_LP_INT_F,
2296 DBFIFO_HP_INT_F | DBFIFO_LP_INT_F);
2298 t4_set_reg_field(adap, SGE_INT_ENABLE3_A,
2299 DBFIFO_LP_INT_F, DBFIFO_LP_INT_F);
2302 static void sync_txq_pidx(struct adapter *adap, struct sge_txq *q)
2304 u16 hw_pidx, hw_cidx;
2307 spin_lock_irq(&q->db_lock);
2308 ret = read_eq_indices(adap, (u16)q->cntxt_id, &hw_pidx, &hw_cidx);
2311 if (q->db_pidx != hw_pidx) {
2315 if (q->db_pidx >= hw_pidx)
2316 delta = q->db_pidx - hw_pidx;
2318 delta = q->size - hw_pidx + q->db_pidx;
2320 if (is_t4(adap->params.chip))
2321 val = PIDX_V(delta);
2323 val = PIDX_T5_V(delta);
2325 t4_write_reg(adap, MYPF_REG(SGE_PF_KDOORBELL_A),
2326 QID_V(q->cntxt_id) | val);
2331 spin_unlock_irq(&q->db_lock);
2333 CH_WARN(adap, "DB drop recovery failed.\n");
2335 static void recover_all_queues(struct adapter *adap)
2339 for_each_ethrxq(&adap->sge, i)
2340 sync_txq_pidx(adap, &adap->sge.ethtxq[i].q);
2341 for_each_ofldrxq(&adap->sge, i)
2342 sync_txq_pidx(adap, &adap->sge.ofldtxq[i].q);
2343 for_each_port(adap, i)
2344 sync_txq_pidx(adap, &adap->sge.ctrlq[i].q);
2347 static void process_db_drop(struct work_struct *work)
2349 struct adapter *adap;
2351 adap = container_of(work, struct adapter, db_drop_task);
2353 if (is_t4(adap->params.chip)) {
2354 drain_db_fifo(adap, dbfifo_drain_delay);
2355 notify_rdma_uld(adap, CXGB4_CONTROL_DB_DROP);
2356 drain_db_fifo(adap, dbfifo_drain_delay);
2357 recover_all_queues(adap);
2358 drain_db_fifo(adap, dbfifo_drain_delay);
2360 notify_rdma_uld(adap, CXGB4_CONTROL_DB_EMPTY);
2361 } else if (is_t5(adap->params.chip)) {
2362 u32 dropped_db = t4_read_reg(adap, 0x010ac);
2363 u16 qid = (dropped_db >> 15) & 0x1ffff;
2364 u16 pidx_inc = dropped_db & 0x1fff;
2366 unsigned int bar2_qid;
2369 ret = t4_bar2_sge_qregs(adap, qid, T4_BAR2_QTYPE_EGRESS,
2370 0, &bar2_qoffset, &bar2_qid);
2372 dev_err(adap->pdev_dev, "doorbell drop recovery: "
2373 "qid=%d, pidx_inc=%d\n", qid, pidx_inc);
2375 writel(PIDX_T5_V(pidx_inc) | QID_V(bar2_qid),
2376 adap->bar2 + bar2_qoffset + SGE_UDB_KDOORBELL);
2378 /* Re-enable BAR2 WC */
2379 t4_set_reg_field(adap, 0x10b0, 1<<15, 1<<15);
2382 if (CHELSIO_CHIP_VERSION(adap->params.chip) <= CHELSIO_T5)
2383 t4_set_reg_field(adap, SGE_DOORBELL_CONTROL_A, DROPPED_DB_F, 0);
2386 void t4_db_full(struct adapter *adap)
2388 if (is_t4(adap->params.chip)) {
2390 notify_rdma_uld(adap, CXGB4_CONTROL_DB_FULL);
2391 t4_set_reg_field(adap, SGE_INT_ENABLE3_A,
2392 DBFIFO_HP_INT_F | DBFIFO_LP_INT_F, 0);
2393 queue_work(adap->workq, &adap->db_full_task);
2397 void t4_db_dropped(struct adapter *adap)
2399 if (is_t4(adap->params.chip)) {
2401 notify_rdma_uld(adap, CXGB4_CONTROL_DB_FULL);
2403 queue_work(adap->workq, &adap->db_drop_task);
2406 static void uld_attach(struct adapter *adap, unsigned int uld)
2409 struct cxgb4_lld_info lli;
2412 lli.pdev = adap->pdev;
2414 lli.l2t = adap->l2t;
2415 lli.tids = &adap->tids;
2416 lli.ports = adap->port;
2417 lli.vr = &adap->vres;
2418 lli.mtus = adap->params.mtus;
2419 if (uld == CXGB4_ULD_RDMA) {
2420 lli.rxq_ids = adap->sge.rdma_rxq;
2421 lli.ciq_ids = adap->sge.rdma_ciq;
2422 lli.nrxq = adap->sge.rdmaqs;
2423 lli.nciq = adap->sge.rdmaciqs;
2424 } else if (uld == CXGB4_ULD_ISCSI) {
2425 lli.rxq_ids = adap->sge.ofld_rxq;
2426 lli.nrxq = adap->sge.ofldqsets;
2428 lli.ntxq = adap->sge.ofldqsets;
2429 lli.nchan = adap->params.nports;
2430 lli.nports = adap->params.nports;
2431 lli.wr_cred = adap->params.ofldq_wr_cred;
2432 lli.adapter_type = adap->params.chip;
2433 lli.iscsi_iolen = MAXRXDATA_G(t4_read_reg(adap, TP_PARA_REG2_A));
2434 lli.cclk_ps = 1000000000 / adap->params.vpd.cclk;
2435 lli.udb_density = 1 << adap->params.sge.eq_qpp;
2436 lli.ucq_density = 1 << adap->params.sge.iq_qpp;
2437 lli.filt_mode = adap->params.tp.vlan_pri_map;
2438 /* MODQ_REQ_MAP sets queues 0-3 to chan 0-3 */
2439 for (i = 0; i < NCHAN; i++)
2441 lli.gts_reg = adap->regs + MYPF_REG(SGE_PF_GTS_A);
2442 lli.db_reg = adap->regs + MYPF_REG(SGE_PF_KDOORBELL_A);
2443 lli.fw_vers = adap->params.fw_vers;
2444 lli.dbfifo_int_thresh = dbfifo_int_thresh;
2445 lli.sge_ingpadboundary = adap->sge.fl_align;
2446 lli.sge_egrstatuspagesize = adap->sge.stat_len;
2447 lli.sge_pktshift = adap->sge.pktshift;
2448 lli.enable_fw_ofld_conn = adap->flags & FW_OFLD_CONN;
2449 lli.max_ordird_qp = adap->params.max_ordird_qp;
2450 lli.max_ird_adapter = adap->params.max_ird_adapter;
2451 lli.ulptx_memwrite_dsgl = adap->params.ulptx_memwrite_dsgl;
2452 lli.nodeid = dev_to_node(adap->pdev_dev);
2454 handle = ulds[uld].add(&lli);
2455 if (IS_ERR(handle)) {
2456 dev_warn(adap->pdev_dev,
2457 "could not attach to the %s driver, error %ld\n",
2458 uld_str[uld], PTR_ERR(handle));
2462 adap->uld_handle[uld] = handle;
2464 if (!netevent_registered) {
2465 register_netevent_notifier(&cxgb4_netevent_nb);
2466 netevent_registered = true;
2469 if (adap->flags & FULL_INIT_DONE)
2470 ulds[uld].state_change(handle, CXGB4_STATE_UP);
2473 static void attach_ulds(struct adapter *adap)
2477 spin_lock(&adap_rcu_lock);
2478 list_add_tail_rcu(&adap->rcu_node, &adap_rcu_list);
2479 spin_unlock(&adap_rcu_lock);
2481 mutex_lock(&uld_mutex);
2482 list_add_tail(&adap->list_node, &adapter_list);
2483 for (i = 0; i < CXGB4_ULD_MAX; i++)
2485 uld_attach(adap, i);
2486 mutex_unlock(&uld_mutex);
2489 static void detach_ulds(struct adapter *adap)
2493 mutex_lock(&uld_mutex);
2494 list_del(&adap->list_node);
2495 for (i = 0; i < CXGB4_ULD_MAX; i++)
2496 if (adap->uld_handle[i]) {
2497 ulds[i].state_change(adap->uld_handle[i],
2498 CXGB4_STATE_DETACH);
2499 adap->uld_handle[i] = NULL;
2501 if (netevent_registered && list_empty(&adapter_list)) {
2502 unregister_netevent_notifier(&cxgb4_netevent_nb);
2503 netevent_registered = false;
2505 mutex_unlock(&uld_mutex);
2507 spin_lock(&adap_rcu_lock);
2508 list_del_rcu(&adap->rcu_node);
2509 spin_unlock(&adap_rcu_lock);
2512 static void notify_ulds(struct adapter *adap, enum cxgb4_state new_state)
2516 mutex_lock(&uld_mutex);
2517 for (i = 0; i < CXGB4_ULD_MAX; i++)
2518 if (adap->uld_handle[i])
2519 ulds[i].state_change(adap->uld_handle[i], new_state);
2520 mutex_unlock(&uld_mutex);
2524 * cxgb4_register_uld - register an upper-layer driver
2525 * @type: the ULD type
2526 * @p: the ULD methods
2528 * Registers an upper-layer driver with this driver and notifies the ULD
2529 * about any presently available devices that support its type. Returns
2530 * %-EBUSY if a ULD of the same type is already registered.
2532 int cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p)
2535 struct adapter *adap;
2537 if (type >= CXGB4_ULD_MAX)
2539 mutex_lock(&uld_mutex);
2540 if (ulds[type].add) {
2545 list_for_each_entry(adap, &adapter_list, list_node)
2546 uld_attach(adap, type);
2547 out: mutex_unlock(&uld_mutex);
2550 EXPORT_SYMBOL(cxgb4_register_uld);
2553 * cxgb4_unregister_uld - unregister an upper-layer driver
2554 * @type: the ULD type
2556 * Unregisters an existing upper-layer driver.
2558 int cxgb4_unregister_uld(enum cxgb4_uld type)
2560 struct adapter *adap;
2562 if (type >= CXGB4_ULD_MAX)
2564 mutex_lock(&uld_mutex);
2565 list_for_each_entry(adap, &adapter_list, list_node)
2566 adap->uld_handle[type] = NULL;
2567 ulds[type].add = NULL;
2568 mutex_unlock(&uld_mutex);
2571 EXPORT_SYMBOL(cxgb4_unregister_uld);
2573 #if IS_ENABLED(CONFIG_IPV6)
2574 static int cxgb4_inet6addr_handler(struct notifier_block *this,
2575 unsigned long event, void *data)
2577 struct inet6_ifaddr *ifa = data;
2578 struct net_device *event_dev = ifa->idev->dev;
2579 const struct device *parent = NULL;
2580 #if IS_ENABLED(CONFIG_BONDING)
2581 struct adapter *adap;
2583 if (event_dev->priv_flags & IFF_802_1Q_VLAN)
2584 event_dev = vlan_dev_real_dev(event_dev);
2585 #if IS_ENABLED(CONFIG_BONDING)
2586 if (event_dev->flags & IFF_MASTER) {
2587 list_for_each_entry(adap, &adapter_list, list_node) {
2590 cxgb4_clip_get(adap->port[0],
2591 (const u32 *)ifa, 1);
2594 cxgb4_clip_release(adap->port[0],
2595 (const u32 *)ifa, 1);
2606 parent = event_dev->dev.parent;
2608 if (parent && parent->driver == &cxgb4_driver.driver) {
2611 cxgb4_clip_get(event_dev, (const u32 *)ifa, 1);
2614 cxgb4_clip_release(event_dev, (const u32 *)ifa, 1);
2623 static bool inet6addr_registered;
2624 static struct notifier_block cxgb4_inet6addr_notifier = {
2625 .notifier_call = cxgb4_inet6addr_handler
2628 static void update_clip(const struct adapter *adap)
2631 struct net_device *dev;
2636 for (i = 0; i < MAX_NPORTS; i++) {
2637 dev = adap->port[i];
2641 ret = cxgb4_update_root_dev_clip(dev);
2648 #endif /* IS_ENABLED(CONFIG_IPV6) */
2651 * cxgb_up - enable the adapter
2652 * @adap: adapter being enabled
2654 * Called when the first port is enabled, this function performs the
2655 * actions necessary to make an adapter operational, such as completing
2656 * the initialization of HW modules, and enabling interrupts.
2658 * Must be called with the rtnl lock held.
2660 static int cxgb_up(struct adapter *adap)
2664 err = setup_sge_queues(adap);
2667 err = setup_rss(adap);
2671 if (adap->flags & USING_MSIX) {
2672 name_msix_vecs(adap);
2673 err = request_irq(adap->msix_info[0].vec, t4_nondata_intr, 0,
2674 adap->msix_info[0].desc, adap);
2678 err = request_msix_queue_irqs(adap);
2680 free_irq(adap->msix_info[0].vec, adap);
2684 err = request_irq(adap->pdev->irq, t4_intr_handler(adap),
2685 (adap->flags & USING_MSI) ? 0 : IRQF_SHARED,
2686 adap->port[0]->name, adap);
2692 t4_intr_enable(adap);
2693 adap->flags |= FULL_INIT_DONE;
2694 notify_ulds(adap, CXGB4_STATE_UP);
2695 #if IS_ENABLED(CONFIG_IPV6)
2701 dev_err(adap->pdev_dev, "request_irq failed, err %d\n", err);
2703 t4_free_sge_resources(adap);
2707 static void cxgb_down(struct adapter *adapter)
2709 cancel_work_sync(&adapter->tid_release_task);
2710 cancel_work_sync(&adapter->db_full_task);
2711 cancel_work_sync(&adapter->db_drop_task);
2712 adapter->tid_release_task_busy = false;
2713 adapter->tid_release_head = NULL;
2715 t4_sge_stop(adapter);
2716 t4_free_sge_resources(adapter);
2717 adapter->flags &= ~FULL_INIT_DONE;
2721 * net_device operations
2723 static int cxgb_open(struct net_device *dev)
2726 struct port_info *pi = netdev_priv(dev);
2727 struct adapter *adapter = pi->adapter;
2729 netif_carrier_off(dev);
2731 if (!(adapter->flags & FULL_INIT_DONE)) {
2732 err = cxgb_up(adapter);
2737 err = link_start(dev);
2739 netif_tx_start_all_queues(dev);
2743 static int cxgb_close(struct net_device *dev)
2745 struct port_info *pi = netdev_priv(dev);
2746 struct adapter *adapter = pi->adapter;
2748 netif_tx_stop_all_queues(dev);
2749 netif_carrier_off(dev);
2750 return t4_enable_vi(adapter, adapter->pf, pi->viid, false, false);
2753 /* Return an error number if the indicated filter isn't writable ...
2755 static int writable_filter(struct filter_entry *f)
2765 /* Delete the filter at the specified index (if valid). The checks for all
2766 * the common problems with doing this like the filter being locked, currently
2767 * pending in another operation, etc.
2769 static int delete_filter(struct adapter *adapter, unsigned int fidx)
2771 struct filter_entry *f;
2774 if (fidx >= adapter->tids.nftids + adapter->tids.nsftids)
2777 f = &adapter->tids.ftid_tab[fidx];
2778 ret = writable_filter(f);
2782 return del_filter_wr(adapter, fidx);
2787 int cxgb4_create_server_filter(const struct net_device *dev, unsigned int stid,
2788 __be32 sip, __be16 sport, __be16 vlan,
2789 unsigned int queue, unsigned char port, unsigned char mask)
2792 struct filter_entry *f;
2793 struct adapter *adap;
2797 adap = netdev2adap(dev);
2799 /* Adjust stid to correct filter index */
2800 stid -= adap->tids.sftid_base;
2801 stid += adap->tids.nftids;
2803 /* Check to make sure the filter requested is writable ...
2805 f = &adap->tids.ftid_tab[stid];
2806 ret = writable_filter(f);
2810 /* Clear out any old resources being used by the filter before
2811 * we start constructing the new filter.
2814 clear_filter(adap, f);
2816 /* Clear out filter specifications */
2817 memset(&f->fs, 0, sizeof(struct ch_filter_specification));
2818 f->fs.val.lport = cpu_to_be16(sport);
2819 f->fs.mask.lport = ~0;
2821 if ((val[0] | val[1] | val[2] | val[3]) != 0) {
2822 for (i = 0; i < 4; i++) {
2823 f->fs.val.lip[i] = val[i];
2824 f->fs.mask.lip[i] = ~0;
2826 if (adap->params.tp.vlan_pri_map & PORT_F) {
2827 f->fs.val.iport = port;
2828 f->fs.mask.iport = mask;
2832 if (adap->params.tp.vlan_pri_map & PROTOCOL_F) {
2833 f->fs.val.proto = IPPROTO_TCP;
2834 f->fs.mask.proto = ~0;
2839 /* Mark filter as locked */
2843 ret = set_filter_wr(adap, stid);
2845 clear_filter(adap, f);
2851 EXPORT_SYMBOL(cxgb4_create_server_filter);
2853 int cxgb4_remove_server_filter(const struct net_device *dev, unsigned int stid,
2854 unsigned int queue, bool ipv6)
2857 struct filter_entry *f;
2858 struct adapter *adap;
2860 adap = netdev2adap(dev);
2862 /* Adjust stid to correct filter index */
2863 stid -= adap->tids.sftid_base;
2864 stid += adap->tids.nftids;
2866 f = &adap->tids.ftid_tab[stid];
2867 /* Unlock the filter */
2870 ret = delete_filter(adap, stid);
2876 EXPORT_SYMBOL(cxgb4_remove_server_filter);
2878 static struct rtnl_link_stats64 *cxgb_get_stats(struct net_device *dev,
2879 struct rtnl_link_stats64 *ns)
2881 struct port_stats stats;
2882 struct port_info *p = netdev_priv(dev);
2883 struct adapter *adapter = p->adapter;
2885 /* Block retrieving statistics during EEH error
2886 * recovery. Otherwise, the recovery might fail
2887 * and the PCI device will be removed permanently
2889 spin_lock(&adapter->stats_lock);
2890 if (!netif_device_present(dev)) {
2891 spin_unlock(&adapter->stats_lock);
2894 t4_get_port_stats_offset(adapter, p->tx_chan, &stats,
2896 spin_unlock(&adapter->stats_lock);
2898 ns->tx_bytes = stats.tx_octets;
2899 ns->tx_packets = stats.tx_frames;
2900 ns->rx_bytes = stats.rx_octets;
2901 ns->rx_packets = stats.rx_frames;
2902 ns->multicast = stats.rx_mcast_frames;
2904 /* detailed rx_errors */
2905 ns->rx_length_errors = stats.rx_jabber + stats.rx_too_long +
2907 ns->rx_over_errors = 0;
2908 ns->rx_crc_errors = stats.rx_fcs_err;
2909 ns->rx_frame_errors = stats.rx_symbol_err;
2910 ns->rx_fifo_errors = stats.rx_ovflow0 + stats.rx_ovflow1 +
2911 stats.rx_ovflow2 + stats.rx_ovflow3 +
2912 stats.rx_trunc0 + stats.rx_trunc1 +
2913 stats.rx_trunc2 + stats.rx_trunc3;
2914 ns->rx_missed_errors = 0;
2916 /* detailed tx_errors */
2917 ns->tx_aborted_errors = 0;
2918 ns->tx_carrier_errors = 0;
2919 ns->tx_fifo_errors = 0;
2920 ns->tx_heartbeat_errors = 0;
2921 ns->tx_window_errors = 0;
2923 ns->tx_errors = stats.tx_error_frames;
2924 ns->rx_errors = stats.rx_symbol_err + stats.rx_fcs_err +
2925 ns->rx_length_errors + stats.rx_len_err + ns->rx_fifo_errors;
2929 static int cxgb_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
2932 int ret = 0, prtad, devad;
2933 struct port_info *pi = netdev_priv(dev);
2934 struct mii_ioctl_data *data = (struct mii_ioctl_data *)&req->ifr_data;
2938 if (pi->mdio_addr < 0)
2940 data->phy_id = pi->mdio_addr;
2944 if (mdio_phy_id_is_c45(data->phy_id)) {
2945 prtad = mdio_phy_id_prtad(data->phy_id);
2946 devad = mdio_phy_id_devad(data->phy_id);
2947 } else if (data->phy_id < 32) {
2948 prtad = data->phy_id;
2950 data->reg_num &= 0x1f;
2954 mbox = pi->adapter->pf;
2955 if (cmd == SIOCGMIIREG)
2956 ret = t4_mdio_rd(pi->adapter, mbox, prtad, devad,
2957 data->reg_num, &data->val_out);
2959 ret = t4_mdio_wr(pi->adapter, mbox, prtad, devad,
2960 data->reg_num, data->val_in);
2968 static void cxgb_set_rxmode(struct net_device *dev)
2970 /* unfortunately we can't return errors to the stack */
2971 set_rxmode(dev, -1, false);
2974 static int cxgb_change_mtu(struct net_device *dev, int new_mtu)
2977 struct port_info *pi = netdev_priv(dev);
2979 if (new_mtu < 81 || new_mtu > MAX_MTU) /* accommodate SACK */
2981 ret = t4_set_rxmode(pi->adapter, pi->adapter->pf, pi->viid, new_mtu, -1,
2988 static int cxgb_set_mac_addr(struct net_device *dev, void *p)
2991 struct sockaddr *addr = p;
2992 struct port_info *pi = netdev_priv(dev);
2994 if (!is_valid_ether_addr(addr->sa_data))
2995 return -EADDRNOTAVAIL;
2997 ret = t4_change_mac(pi->adapter, pi->adapter->pf, pi->viid,
2998 pi->xact_addr_filt, addr->sa_data, true, true);
3002 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
3003 pi->xact_addr_filt = ret;
3007 #ifdef CONFIG_NET_POLL_CONTROLLER
3008 static void cxgb_netpoll(struct net_device *dev)
3010 struct port_info *pi = netdev_priv(dev);
3011 struct adapter *adap = pi->adapter;
3013 if (adap->flags & USING_MSIX) {
3015 struct sge_eth_rxq *rx = &adap->sge.ethrxq[pi->first_qset];
3017 for (i = pi->nqsets; i; i--, rx++)
3018 t4_sge_intr_msix(0, &rx->rspq);
3020 t4_intr_handler(adap)(0, adap);
3024 static const struct net_device_ops cxgb4_netdev_ops = {
3025 .ndo_open = cxgb_open,
3026 .ndo_stop = cxgb_close,
3027 .ndo_start_xmit = t4_eth_xmit,
3028 .ndo_select_queue = cxgb_select_queue,
3029 .ndo_get_stats64 = cxgb_get_stats,
3030 .ndo_set_rx_mode = cxgb_set_rxmode,
3031 .ndo_set_mac_address = cxgb_set_mac_addr,
3032 .ndo_set_features = cxgb_set_features,
3033 .ndo_validate_addr = eth_validate_addr,
3034 .ndo_do_ioctl = cxgb_ioctl,
3035 .ndo_change_mtu = cxgb_change_mtu,
3036 #ifdef CONFIG_NET_POLL_CONTROLLER
3037 .ndo_poll_controller = cxgb_netpoll,
3039 #ifdef CONFIG_CHELSIO_T4_FCOE
3040 .ndo_fcoe_enable = cxgb_fcoe_enable,
3041 .ndo_fcoe_disable = cxgb_fcoe_disable,
3042 #endif /* CONFIG_CHELSIO_T4_FCOE */
3043 #ifdef CONFIG_NET_RX_BUSY_POLL
3044 .ndo_busy_poll = cxgb_busy_poll,
3049 void t4_fatal_err(struct adapter *adap)
3051 t4_set_reg_field(adap, SGE_CONTROL_A, GLOBALENABLE_F, 0);
3052 t4_intr_disable(adap);
3053 dev_alert(adap->pdev_dev, "encountered fatal error, adapter stopped\n");
3056 static void setup_memwin(struct adapter *adap)
3058 u32 nic_win_base = t4_get_util_window(adap);
3060 t4_setup_memwin(adap, nic_win_base, MEMWIN_NIC);
3063 static void setup_memwin_rdma(struct adapter *adap)
3065 if (adap->vres.ocq.size) {
3069 start = t4_read_pcie_cfg4(adap, PCI_BASE_ADDRESS_2);
3070 start &= PCI_BASE_ADDRESS_MEM_MASK;
3071 start += OCQ_WIN_OFFSET(adap->pdev, &adap->vres);
3072 sz_kb = roundup_pow_of_two(adap->vres.ocq.size) >> 10;
3074 PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_BASE_WIN_A, 3),
3075 start | BIR_V(1) | WINDOW_V(ilog2(sz_kb)));
3077 PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_OFFSET_A, 3),
3078 adap->vres.ocq.start);
3080 PCIE_MEM_ACCESS_REG(PCIE_MEM_ACCESS_OFFSET_A, 3));
3084 static int adap_init1(struct adapter *adap, struct fw_caps_config_cmd *c)
3089 /* get device capabilities */
3090 memset(c, 0, sizeof(*c));
3091 c->op_to_write = htonl(FW_CMD_OP_V(FW_CAPS_CONFIG_CMD) |
3092 FW_CMD_REQUEST_F | FW_CMD_READ_F);
3093 c->cfvalid_to_len16 = htonl(FW_LEN16(*c));
3094 ret = t4_wr_mbox(adap, adap->mbox, c, sizeof(*c), c);
3098 /* select capabilities we'll be using */
3099 if (c->niccaps & htons(FW_CAPS_CONFIG_NIC_VM)) {
3101 c->niccaps ^= htons(FW_CAPS_CONFIG_NIC_VM);
3103 c->niccaps = htons(FW_CAPS_CONFIG_NIC_VM);
3104 } else if (vf_acls) {
3105 dev_err(adap->pdev_dev, "virtualization ACLs not supported");
3108 c->op_to_write = htonl(FW_CMD_OP_V(FW_CAPS_CONFIG_CMD) |
3109 FW_CMD_REQUEST_F | FW_CMD_WRITE_F);
3110 ret = t4_wr_mbox(adap, adap->mbox, c, sizeof(*c), NULL);
3114 ret = t4_config_glbl_rss(adap, adap->pf,
3115 FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL,
3116 FW_RSS_GLB_CONFIG_CMD_TNLMAPEN_F |
3117 FW_RSS_GLB_CONFIG_CMD_TNLALLLKP_F);
3121 ret = t4_cfg_pfvf(adap, adap->mbox, adap->pf, 0, adap->sge.egr_sz, 64,
3122 MAX_INGQ, 0, 0, 4, 0xf, 0xf, 16, FW_CMD_CAP_PF,
3129 /* tweak some settings */
3130 t4_write_reg(adap, TP_SHIFT_CNT_A, 0x64f8849);
3131 t4_write_reg(adap, ULP_RX_TDDP_PSZ_A, HPZ0_V(PAGE_SHIFT - 12));
3132 t4_write_reg(adap, TP_PIO_ADDR_A, TP_INGRESS_CONFIG_A);
3133 v = t4_read_reg(adap, TP_PIO_DATA_A);
3134 t4_write_reg(adap, TP_PIO_DATA_A, v & ~CSUM_HAS_PSEUDO_HDR_F);
3136 /* first 4 Tx modulation queues point to consecutive Tx channels */
3137 adap->params.tp.tx_modq_map = 0xE4;
3138 t4_write_reg(adap, TP_TX_MOD_QUEUE_REQ_MAP_A,
3139 TX_MOD_QUEUE_REQ_MAP_V(adap->params.tp.tx_modq_map));
3141 /* associate each Tx modulation queue with consecutive Tx channels */
3143 t4_write_indirect(adap, TP_PIO_ADDR_A, TP_PIO_DATA_A,
3144 &v, 1, TP_TX_SCHED_HDR_A);
3145 t4_write_indirect(adap, TP_PIO_ADDR_A, TP_PIO_DATA_A,
3146 &v, 1, TP_TX_SCHED_FIFO_A);
3147 t4_write_indirect(adap, TP_PIO_ADDR_A, TP_PIO_DATA_A,
3148 &v, 1, TP_TX_SCHED_PCMD_A);
3150 #define T4_TX_MODQ_10G_WEIGHT_DEFAULT 16 /* in KB units */
3151 if (is_offload(adap)) {
3152 t4_write_reg(adap, TP_TX_MOD_QUEUE_WEIGHT0_A,
3153 TX_MODQ_WEIGHT0_V(T4_TX_MODQ_10G_WEIGHT_DEFAULT) |
3154 TX_MODQ_WEIGHT1_V(T4_TX_MODQ_10G_WEIGHT_DEFAULT) |
3155 TX_MODQ_WEIGHT2_V(T4_TX_MODQ_10G_WEIGHT_DEFAULT) |
3156 TX_MODQ_WEIGHT3_V(T4_TX_MODQ_10G_WEIGHT_DEFAULT));
3157 t4_write_reg(adap, TP_TX_MOD_CHANNEL_WEIGHT_A,
3158 TX_MODQ_WEIGHT0_V(T4_TX_MODQ_10G_WEIGHT_DEFAULT) |
3159 TX_MODQ_WEIGHT1_V(T4_TX_MODQ_10G_WEIGHT_DEFAULT) |
3160 TX_MODQ_WEIGHT2_V(T4_TX_MODQ_10G_WEIGHT_DEFAULT) |
3161 TX_MODQ_WEIGHT3_V(T4_TX_MODQ_10G_WEIGHT_DEFAULT));
3164 /* get basic stuff going */
3165 return t4_early_init(adap, adap->pf);
3169 * Max # of ATIDs. The absolute HW max is 16K but we keep it lower.
3171 #define MAX_ATIDS 8192U
3174 * Phase 0 of initialization: contact FW, obtain config, perform basic init.
3176 * If the firmware we're dealing with has Configuration File support, then
3177 * we use that to perform all configuration
3181 * Tweak configuration based on module parameters, etc. Most of these have
3182 * defaults assigned to them by Firmware Configuration Files (if we're using
3183 * them) but need to be explicitly set if we're using hard-coded
3184 * initialization. But even in the case of using Firmware Configuration
3185 * Files, we'd like to expose the ability to change these via module
3186 * parameters so these are essentially common tweaks/settings for
3187 * Configuration Files and hard-coded initialization ...
3189 static int adap_init0_tweaks(struct adapter *adapter)
3192 * Fix up various Host-Dependent Parameters like Page Size, Cache
3193 * Line Size, etc. The firmware default is for a 4KB Page Size and
3194 * 64B Cache Line Size ...
3196 t4_fixup_host_params(adapter, PAGE_SIZE, L1_CACHE_BYTES);
3199 * Process module parameters which affect early initialization.
3201 if (rx_dma_offset != 2 && rx_dma_offset != 0) {
3202 dev_err(&adapter->pdev->dev,
3203 "Ignoring illegal rx_dma_offset=%d, using 2\n",
3207 t4_set_reg_field(adapter, SGE_CONTROL_A,
3208 PKTSHIFT_V(PKTSHIFT_M),
3209 PKTSHIFT_V(rx_dma_offset));
3212 * Don't include the "IP Pseudo Header" in CPL_RX_PKT checksums: Linux
3213 * adds the pseudo header itself.
3215 t4_tp_wr_bits_indirect(adapter, TP_INGRESS_CONFIG_A,
3216 CSUM_HAS_PSEUDO_HDR_F, 0);
3221 /* 10Gb/s-BT PHY Support. chip-external 10Gb/s-BT PHYs are complex chips
3222 * unto themselves and they contain their own firmware to perform their
3225 static int phy_aq1202_version(const u8 *phy_fw_data,
3230 /* At offset 0x8 you're looking for the primary image's
3231 * starting offset which is 3 Bytes wide
3233 * At offset 0xa of the primary image, you look for the offset
3234 * of the DRAM segment which is 3 Bytes wide.
3236 * The FW version is at offset 0x27e of the DRAM and is 2 Bytes
3239 #define be16(__p) (((__p)[0] << 8) | (__p)[1])
3240 #define le16(__p) ((__p)[0] | ((__p)[1] << 8))
3241 #define le24(__p) (le16(__p) | ((__p)[2] << 16))
3243 offset = le24(phy_fw_data + 0x8) << 12;
3244 offset = le24(phy_fw_data + offset + 0xa);
3245 return be16(phy_fw_data + offset + 0x27e);
3252 static struct info_10gbt_phy_fw {
3253 unsigned int phy_fw_id; /* PCI Device ID */
3254 char *phy_fw_file; /* /lib/firmware/ PHY Firmware file */
3255 int (*phy_fw_version)(const u8 *phy_fw_data, size_t phy_fw_size);
3256 int phy_flash; /* Has FLASH for PHY Firmware */
3257 } phy_info_array[] = {
3259 PHY_AQ1202_DEVICEID,
3260 PHY_AQ1202_FIRMWARE,
3265 PHY_BCM84834_DEVICEID,
3266 PHY_BCM84834_FIRMWARE,
3273 static struct info_10gbt_phy_fw *find_phy_info(int devid)
3277 for (i = 0; i < ARRAY_SIZE(phy_info_array); i++) {
3278 if (phy_info_array[i].phy_fw_id == devid)
3279 return &phy_info_array[i];
3284 /* Handle updating of chip-external 10Gb/s-BT PHY firmware. This needs to
3285 * happen after the FW_RESET_CMD but before the FW_INITIALIZE_CMD. On error
3286 * we return a negative error number. If we transfer new firmware we return 1
3287 * (from t4_load_phy_fw()). If we don't do anything we return 0.
3289 static int adap_init0_phy(struct adapter *adap)
3291 const struct firmware *phyf;
3293 struct info_10gbt_phy_fw *phy_info;
3295 /* Use the device ID to determine which PHY file to flash.
3297 phy_info = find_phy_info(adap->pdev->device);
3299 dev_warn(adap->pdev_dev,
3300 "No PHY Firmware file found for this PHY\n");
3304 /* If we have a T4 PHY firmware file under /lib/firmware/cxgb4/, then
3305 * use that. The adapter firmware provides us with a memory buffer
3306 * where we can load a PHY firmware file from the host if we want to
3307 * override the PHY firmware File in flash.
3309 ret = request_firmware_direct(&phyf, phy_info->phy_fw_file,
3312 /* For adapters without FLASH attached to PHY for their
3313 * firmware, it's obviously a fatal error if we can't get the
3314 * firmware to the adapter. For adapters with PHY firmware
3315 * FLASH storage, it's worth a warning if we can't find the
3316 * PHY Firmware but we'll neuter the error ...
3318 dev_err(adap->pdev_dev, "unable to find PHY Firmware image "
3319 "/lib/firmware/%s, error %d\n",
3320 phy_info->phy_fw_file, -ret);
3321 if (phy_info->phy_flash) {
3322 int cur_phy_fw_ver = 0;
3324 t4_phy_fw_ver(adap, &cur_phy_fw_ver);
3325 dev_warn(adap->pdev_dev, "continuing with, on-adapter "
3326 "FLASH copy, version %#x\n", cur_phy_fw_ver);
3333 /* Load PHY Firmware onto adapter.
3335 ret = t4_load_phy_fw(adap, MEMWIN_NIC, &adap->win0_lock,
3336 phy_info->phy_fw_version,
3337 (u8 *)phyf->data, phyf->size);
3339 dev_err(adap->pdev_dev, "PHY Firmware transfer error %d\n",
3342 int new_phy_fw_ver = 0;
3344 if (phy_info->phy_fw_version)
3345 new_phy_fw_ver = phy_info->phy_fw_version(phyf->data,
3347 dev_info(adap->pdev_dev, "Successfully transferred PHY "
3348 "Firmware /lib/firmware/%s, version %#x\n",
3349 phy_info->phy_fw_file, new_phy_fw_ver);
3352 release_firmware(phyf);
3358 * Attempt to initialize the adapter via a Firmware Configuration File.
3360 static int adap_init0_config(struct adapter *adapter, int reset)
3362 struct fw_caps_config_cmd caps_cmd;
3363 const struct firmware *cf;
3364 unsigned long mtype = 0, maddr = 0;
3365 u32 finiver, finicsum, cfcsum;
3367 int config_issued = 0;
3368 char *fw_config_file, fw_config_file_path[256];
3369 char *config_name = NULL;
3372 * Reset device if necessary.
3375 ret = t4_fw_reset(adapter, adapter->mbox,
3376 PIORSTMODE_F | PIORST_F);
3381 /* If this is a 10Gb/s-BT adapter make sure the chip-external
3382 * 10Gb/s-BT PHYs have up-to-date firmware. Note that this step needs
3383 * to be performed after any global adapter RESET above since some
3384 * PHYs only have local RAM copies of the PHY firmware.
3386 if (is_10gbt_device(adapter->pdev->device)) {
3387 ret = adap_init0_phy(adapter);
3392 * If we have a T4 configuration file under /lib/firmware/cxgb4/,
3393 * then use that. Otherwise, use the configuration file stored
3394 * in the adapter flash ...
3396 switch (CHELSIO_CHIP_VERSION(adapter->params.chip)) {
3398 fw_config_file = FW4_CFNAME;
3401 fw_config_file = FW5_CFNAME;
3404 fw_config_file = FW6_CFNAME;
3407 dev_err(adapter->pdev_dev, "Device %d is not supported\n",
3408 adapter->pdev->device);
3413 ret = request_firmware(&cf, fw_config_file, adapter->pdev_dev);
3415 config_name = "On FLASH";
3416 mtype = FW_MEMTYPE_CF_FLASH;
3417 maddr = t4_flash_cfg_addr(adapter);
3419 u32 params[7], val[7];
3421 sprintf(fw_config_file_path,
3422 "/lib/firmware/%s", fw_config_file);
3423 config_name = fw_config_file_path;
3425 if (cf->size >= FLASH_CFG_MAX_SIZE)
3428 params[0] = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
3429 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_CF));
3430 ret = t4_query_params(adapter, adapter->mbox,
3431 adapter->pf, 0, 1, params, val);
3434 * For t4_memory_rw() below addresses and
3435 * sizes have to be in terms of multiples of 4
3436 * bytes. So, if the Configuration File isn't
3437 * a multiple of 4 bytes in length we'll have
3438 * to write that out separately since we can't
3439 * guarantee that the bytes following the
3440 * residual byte in the buffer returned by
3441 * request_firmware() are zeroed out ...
3443 size_t resid = cf->size & 0x3;
3444 size_t size = cf->size & ~0x3;
3445 __be32 *data = (__be32 *)cf->data;
3447 mtype = FW_PARAMS_PARAM_Y_G(val[0]);
3448 maddr = FW_PARAMS_PARAM_Z_G(val[0]) << 16;
3450 spin_lock(&adapter->win0_lock);
3451 ret = t4_memory_rw(adapter, 0, mtype, maddr,
3452 size, data, T4_MEMORY_WRITE);
3453 if (ret == 0 && resid != 0) {
3460 last.word = data[size >> 2];
3461 for (i = resid; i < 4; i++)
3463 ret = t4_memory_rw(adapter, 0, mtype,
3468 spin_unlock(&adapter->win0_lock);
3472 release_firmware(cf);
3478 * Issue a Capability Configuration command to the firmware to get it
3479 * to parse the Configuration File. We don't use t4_fw_config_file()
3480 * because we want the ability to modify various features after we've
3481 * processed the configuration file ...
3483 memset(&caps_cmd, 0, sizeof(caps_cmd));
3484 caps_cmd.op_to_write =
3485 htonl(FW_CMD_OP_V(FW_CAPS_CONFIG_CMD) |
3488 caps_cmd.cfvalid_to_len16 =
3489 htonl(FW_CAPS_CONFIG_CMD_CFVALID_F |
3490 FW_CAPS_CONFIG_CMD_MEMTYPE_CF_V(mtype) |
3491 FW_CAPS_CONFIG_CMD_MEMADDR64K_CF_V(maddr >> 16) |
3492 FW_LEN16(caps_cmd));
3493 ret = t4_wr_mbox(adapter, adapter->mbox, &caps_cmd, sizeof(caps_cmd),
3496 /* If the CAPS_CONFIG failed with an ENOENT (for a Firmware
3497 * Configuration File in FLASH), our last gasp effort is to use the
3498 * Firmware Configuration File which is embedded in the firmware. A
3499 * very few early versions of the firmware didn't have one embedded
3500 * but we can ignore those.
3502 if (ret == -ENOENT) {
3503 memset(&caps_cmd, 0, sizeof(caps_cmd));
3504 caps_cmd.op_to_write =
3505 htonl(FW_CMD_OP_V(FW_CAPS_CONFIG_CMD) |
3508 caps_cmd.cfvalid_to_len16 = htonl(FW_LEN16(caps_cmd));
3509 ret = t4_wr_mbox(adapter, adapter->mbox, &caps_cmd,
3510 sizeof(caps_cmd), &caps_cmd);
3511 config_name = "Firmware Default";
3518 finiver = ntohl(caps_cmd.finiver);
3519 finicsum = ntohl(caps_cmd.finicsum);
3520 cfcsum = ntohl(caps_cmd.cfcsum);
3521 if (finicsum != cfcsum)
3522 dev_warn(adapter->pdev_dev, "Configuration File checksum "\
3523 "mismatch: [fini] csum=%#x, computed csum=%#x\n",
3527 * And now tell the firmware to use the configuration we just loaded.
3529 caps_cmd.op_to_write =
3530 htonl(FW_CMD_OP_V(FW_CAPS_CONFIG_CMD) |
3533 caps_cmd.cfvalid_to_len16 = htonl(FW_LEN16(caps_cmd));
3534 ret = t4_wr_mbox(adapter, adapter->mbox, &caps_cmd, sizeof(caps_cmd),
3540 * Tweak configuration based on system architecture, module
3543 ret = adap_init0_tweaks(adapter);
3548 * And finally tell the firmware to initialize itself using the
3549 * parameters from the Configuration File.
3551 ret = t4_fw_initialize(adapter, adapter->mbox);
3555 /* Emit Firmware Configuration File information and return
3558 dev_info(adapter->pdev_dev, "Successfully configured using Firmware "\
3559 "Configuration File \"%s\", version %#x, computed checksum %#x\n",
3560 config_name, finiver, cfcsum);
3564 * Something bad happened. Return the error ... (If the "error"
3565 * is that there's no Configuration File on the adapter we don't
3566 * want to issue a warning since this is fairly common.)
3569 if (config_issued && ret != -ENOENT)
3570 dev_warn(adapter->pdev_dev, "\"%s\" configuration file error %d\n",
3575 static struct fw_info fw_info_array[] = {
3578 .fs_name = FW4_CFNAME,
3579 .fw_mod_name = FW4_FNAME,
3581 .chip = FW_HDR_CHIP_T4,
3582 .fw_ver = __cpu_to_be32(FW_VERSION(T4)),
3583 .intfver_nic = FW_INTFVER(T4, NIC),
3584 .intfver_vnic = FW_INTFVER(T4, VNIC),
3585 .intfver_ri = FW_INTFVER(T4, RI),
3586 .intfver_iscsi = FW_INTFVER(T4, ISCSI),
3587 .intfver_fcoe = FW_INTFVER(T4, FCOE),
3591 .fs_name = FW5_CFNAME,
3592 .fw_mod_name = FW5_FNAME,
3594 .chip = FW_HDR_CHIP_T5,
3595 .fw_ver = __cpu_to_be32(FW_VERSION(T5)),
3596 .intfver_nic = FW_INTFVER(T5, NIC),
3597 .intfver_vnic = FW_INTFVER(T5, VNIC),
3598 .intfver_ri = FW_INTFVER(T5, RI),
3599 .intfver_iscsi = FW_INTFVER(T5, ISCSI),
3600 .intfver_fcoe = FW_INTFVER(T5, FCOE),
3604 .fs_name = FW6_CFNAME,
3605 .fw_mod_name = FW6_FNAME,
3607 .chip = FW_HDR_CHIP_T6,
3608 .fw_ver = __cpu_to_be32(FW_VERSION(T6)),
3609 .intfver_nic = FW_INTFVER(T6, NIC),
3610 .intfver_vnic = FW_INTFVER(T6, VNIC),
3611 .intfver_ofld = FW_INTFVER(T6, OFLD),
3612 .intfver_ri = FW_INTFVER(T6, RI),
3613 .intfver_iscsipdu = FW_INTFVER(T6, ISCSIPDU),
3614 .intfver_iscsi = FW_INTFVER(T6, ISCSI),
3615 .intfver_fcoepdu = FW_INTFVER(T6, FCOEPDU),
3616 .intfver_fcoe = FW_INTFVER(T6, FCOE),
3622 static struct fw_info *find_fw_info(int chip)
3626 for (i = 0; i < ARRAY_SIZE(fw_info_array); i++) {
3627 if (fw_info_array[i].chip == chip)
3628 return &fw_info_array[i];
3634 * Phase 0 of initialization: contact FW, obtain config, perform basic init.
3636 static int adap_init0(struct adapter *adap)
3640 enum dev_state state;
3641 u32 params[7], val[7];
3642 struct fw_caps_config_cmd caps_cmd;
3645 /* Grab Firmware Device Log parameters as early as possible so we have
3646 * access to it for debugging, etc.
3648 ret = t4_init_devlog_params(adap);
3652 /* Contact FW, advertising Master capability */
3653 ret = t4_fw_hello(adap, adap->mbox, adap->mbox, MASTER_MAY, &state);
3655 dev_err(adap->pdev_dev, "could not connect to FW, error %d\n",
3659 if (ret == adap->mbox)
3660 adap->flags |= MASTER_PF;
3663 * If we're the Master PF Driver and the device is uninitialized,
3664 * then let's consider upgrading the firmware ... (We always want
3665 * to check the firmware version number in order to A. get it for
3666 * later reporting and B. to warn if the currently loaded firmware
3667 * is excessively mismatched relative to the driver.)
3669 t4_get_fw_version(adap, &adap->params.fw_vers);
3670 t4_get_tp_version(adap, &adap->params.tp_vers);
3671 ret = t4_check_fw_version(adap);
3672 /* If firmware is too old (not supported by driver) force an update. */
3674 state = DEV_STATE_UNINIT;
3675 if ((adap->flags & MASTER_PF) && state != DEV_STATE_INIT) {
3676 struct fw_info *fw_info;
3677 struct fw_hdr *card_fw;
3678 const struct firmware *fw;
3679 const u8 *fw_data = NULL;
3680 unsigned int fw_size = 0;
3682 /* This is the firmware whose headers the driver was compiled
3685 fw_info = find_fw_info(CHELSIO_CHIP_VERSION(adap->params.chip));
3686 if (fw_info == NULL) {
3687 dev_err(adap->pdev_dev,
3688 "unable to get firmware info for chip %d.\n",
3689 CHELSIO_CHIP_VERSION(adap->params.chip));
3693 /* allocate memory to read the header of the firmware on the
3696 card_fw = t4_alloc_mem(sizeof(*card_fw));
3698 /* Get FW from from /lib/firmware/ */
3699 ret = request_firmware(&fw, fw_info->fw_mod_name,
3702 dev_err(adap->pdev_dev,
3703 "unable to load firmware image %s, error %d\n",
3704 fw_info->fw_mod_name, ret);
3710 /* upgrade FW logic */
3711 ret = t4_prep_fw(adap, fw_info, fw_data, fw_size, card_fw,
3715 release_firmware(fw);
3716 t4_free_mem(card_fw);
3723 * Grab VPD parameters. This should be done after we establish a
3724 * connection to the firmware since some of the VPD parameters
3725 * (notably the Core Clock frequency) are retrieved via requests to
3726 * the firmware. On the other hand, we need these fairly early on
3727 * so we do this right after getting ahold of the firmware.
3729 ret = t4_get_vpd_params(adap, &adap->params.vpd);
3734 * Find out what ports are available to us. Note that we need to do
3735 * this before calling adap_init0_no_config() since it needs nports
3739 FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
3740 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_PORTVEC);
3741 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1, &v, &port_vec);
3745 adap->params.nports = hweight32(port_vec);
3746 adap->params.portvec = port_vec;
3748 /* If the firmware is initialized already, emit a simply note to that
3749 * effect. Otherwise, it's time to try initializing the adapter.
3751 if (state == DEV_STATE_INIT) {
3752 dev_info(adap->pdev_dev, "Coming up as %s: "\
3753 "Adapter already initialized\n",
3754 adap->flags & MASTER_PF ? "MASTER" : "SLAVE");
3756 dev_info(adap->pdev_dev, "Coming up as MASTER: "\
3757 "Initializing adapter\n");
3759 /* Find out whether we're dealing with a version of the
3760 * firmware which has configuration file support.
3762 params[0] = (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) |
3763 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_CF));
3764 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 1,
3767 /* If the firmware doesn't support Configuration Files,
3771 dev_err(adap->pdev_dev, "firmware doesn't support "
3772 "Firmware Configuration Files\n");
3776 /* The firmware provides us with a memory buffer where we can
3777 * load a Configuration File from the host if we want to
3778 * override the Configuration File in flash.
3780 ret = adap_init0_config(adap, reset);
3781 if (ret == -ENOENT) {
3782 dev_err(adap->pdev_dev, "no Configuration File "
3783 "present on adapter.\n");
3787 dev_err(adap->pdev_dev, "could not initialize "
3788 "adapter, error %d\n", -ret);
3793 /* Give the SGE code a chance to pull in anything that it needs ...
3794 * Note that this must be called after we retrieve our VPD parameters
3795 * in order to know how to convert core ticks to seconds, etc.
3797 ret = t4_sge_init(adap);
3801 if (is_bypass_device(adap->pdev->device))
3802 adap->params.bypass = 1;
3805 * Grab some of our basic fundamental operating parameters.
3807 #define FW_PARAM_DEV(param) \
3808 (FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_DEV) | \
3809 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_DEV_##param))
3811 #define FW_PARAM_PFVF(param) \
3812 FW_PARAMS_MNEM_V(FW_PARAMS_MNEM_PFVF) | \
3813 FW_PARAMS_PARAM_X_V(FW_PARAMS_PARAM_PFVF_##param)| \
3814 FW_PARAMS_PARAM_Y_V(0) | \
3815 FW_PARAMS_PARAM_Z_V(0)
3817 params[0] = FW_PARAM_PFVF(EQ_START);
3818 params[1] = FW_PARAM_PFVF(L2T_START);
3819 params[2] = FW_PARAM_PFVF(L2T_END);
3820 params[3] = FW_PARAM_PFVF(FILTER_START);
3821 params[4] = FW_PARAM_PFVF(FILTER_END);
3822 params[5] = FW_PARAM_PFVF(IQFLINT_START);
3823 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 6, params, val);
3826 adap->sge.egr_start = val[0];
3827 adap->l2t_start = val[1];
3828 adap->l2t_end = val[2];
3829 adap->tids.ftid_base = val[3];
3830 adap->tids.nftids = val[4] - val[3] + 1;
3831 adap->sge.ingr_start = val[5];
3833 /* qids (ingress/egress) returned from firmware can be anywhere
3834 * in the range from EQ(IQFLINT)_START to EQ(IQFLINT)_END.
3835 * Hence driver needs to allocate memory for this range to
3836 * store the queue info. Get the highest IQFLINT/EQ index returned
3837 * in FW_EQ_*_CMD.alloc command.
3839 params[0] = FW_PARAM_PFVF(EQ_END);
3840 params[1] = FW_PARAM_PFVF(IQFLINT_END);
3841 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 2, params, val);
3844 adap->sge.egr_sz = val[0] - adap->sge.egr_start + 1;
3845 adap->sge.ingr_sz = val[1] - adap->sge.ingr_start + 1;
3847 adap->sge.egr_map = kcalloc(adap->sge.egr_sz,
3848 sizeof(*adap->sge.egr_map), GFP_KERNEL);
3849 if (!adap->sge.egr_map) {
3854 adap->sge.ingr_map = kcalloc(adap->sge.ingr_sz,
3855 sizeof(*adap->sge.ingr_map), GFP_KERNEL);
3856 if (!adap->sge.ingr_map) {
3861 /* Allocate the memory for the vaious egress queue bitmaps
3862 * ie starving_fl, txq_maperr and blocked_fl.
3864 adap->sge.starving_fl = kcalloc(BITS_TO_LONGS(adap->sge.egr_sz),
3865 sizeof(long), GFP_KERNEL);
3866 if (!adap->sge.starving_fl) {
3871 adap->sge.txq_maperr = kcalloc(BITS_TO_LONGS(adap->sge.egr_sz),
3872 sizeof(long), GFP_KERNEL);
3873 if (!adap->sge.txq_maperr) {
3878 #ifdef CONFIG_DEBUG_FS
3879 adap->sge.blocked_fl = kcalloc(BITS_TO_LONGS(adap->sge.egr_sz),
3880 sizeof(long), GFP_KERNEL);
3881 if (!adap->sge.blocked_fl) {
3887 params[0] = FW_PARAM_PFVF(CLIP_START);
3888 params[1] = FW_PARAM_PFVF(CLIP_END);
3889 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 2, params, val);
3892 adap->clipt_start = val[0];
3893 adap->clipt_end = val[1];
3895 /* query params related to active filter region */
3896 params[0] = FW_PARAM_PFVF(ACTIVE_FILTER_START);
3897 params[1] = FW_PARAM_PFVF(ACTIVE_FILTER_END);
3898 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 2, params, val);
3899 /* If Active filter size is set we enable establishing
3900 * offload connection through firmware work request
3902 if ((val[0] != val[1]) && (ret >= 0)) {
3903 adap->flags |= FW_OFLD_CONN;
3904 adap->tids.aftid_base = val[0];
3905 adap->tids.aftid_end = val[1];
3908 /* If we're running on newer firmware, let it know that we're
3909 * prepared to deal with encapsulated CPL messages. Older
3910 * firmware won't understand this and we'll just get
3911 * unencapsulated messages ...
3913 params[0] = FW_PARAM_PFVF(CPLFW4MSG_ENCAP);
3915 (void)t4_set_params(adap, adap->mbox, adap->pf, 0, 1, params, val);
3918 * Find out whether we're allowed to use the T5+ ULPTX MEMWRITE DSGL
3919 * capability. Earlier versions of the firmware didn't have the
3920 * ULPTX_MEMWRITE_DSGL so we'll interpret a query failure as no
3921 * permission to use ULPTX MEMWRITE DSGL.
3923 if (is_t4(adap->params.chip)) {
3924 adap->params.ulptx_memwrite_dsgl = false;
3926 params[0] = FW_PARAM_DEV(ULPTX_MEMWRITE_DSGL);
3927 ret = t4_query_params(adap, adap->mbox, adap->pf, 0,
3929 adap->params.ulptx_memwrite_dsgl = (ret == 0 && val[0] != 0);
3933 * Get device capabilities so we can determine what resources we need
3936 memset(&caps_cmd, 0, sizeof(caps_cmd));
3937 caps_cmd.op_to_write = htonl(FW_CMD_OP_V(FW_CAPS_CONFIG_CMD) |
3938 FW_CMD_REQUEST_F | FW_CMD_READ_F);
3939 caps_cmd.cfvalid_to_len16 = htonl(FW_LEN16(caps_cmd));
3940 ret = t4_wr_mbox(adap, adap->mbox, &caps_cmd, sizeof(caps_cmd),
3945 if (caps_cmd.ofldcaps) {
3946 /* query offload-related parameters */
3947 params[0] = FW_PARAM_DEV(NTID);
3948 params[1] = FW_PARAM_PFVF(SERVER_START);
3949 params[2] = FW_PARAM_PFVF(SERVER_END);
3950 params[3] = FW_PARAM_PFVF(TDDP_START);
3951 params[4] = FW_PARAM_PFVF(TDDP_END);
3952 params[5] = FW_PARAM_DEV(FLOWC_BUFFIFO_SZ);
3953 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 6,
3957 adap->tids.ntids = val[0];
3958 adap->tids.natids = min(adap->tids.ntids / 2, MAX_ATIDS);
3959 adap->tids.stid_base = val[1];
3960 adap->tids.nstids = val[2] - val[1] + 1;
3962 * Setup server filter region. Divide the available filter
3963 * region into two parts. Regular filters get 1/3rd and server
3964 * filters get 2/3rd part. This is only enabled if workarond
3966 * 1. For regular filters.
3967 * 2. Server filter: This are special filters which are used
3968 * to redirect SYN packets to offload queue.
3970 if (adap->flags & FW_OFLD_CONN && !is_bypass(adap)) {
3971 adap->tids.sftid_base = adap->tids.ftid_base +
3972 DIV_ROUND_UP(adap->tids.nftids, 3);
3973 adap->tids.nsftids = adap->tids.nftids -
3974 DIV_ROUND_UP(adap->tids.nftids, 3);
3975 adap->tids.nftids = adap->tids.sftid_base -
3976 adap->tids.ftid_base;
3978 adap->vres.ddp.start = val[3];
3979 adap->vres.ddp.size = val[4] - val[3] + 1;
3980 adap->params.ofldq_wr_cred = val[5];
3982 adap->params.offload = 1;
3984 if (caps_cmd.rdmacaps) {
3985 params[0] = FW_PARAM_PFVF(STAG_START);
3986 params[1] = FW_PARAM_PFVF(STAG_END);
3987 params[2] = FW_PARAM_PFVF(RQ_START);
3988 params[3] = FW_PARAM_PFVF(RQ_END);
3989 params[4] = FW_PARAM_PFVF(PBL_START);
3990 params[5] = FW_PARAM_PFVF(PBL_END);
3991 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 6,
3995 adap->vres.stag.start = val[0];
3996 adap->vres.stag.size = val[1] - val[0] + 1;
3997 adap->vres.rq.start = val[2];
3998 adap->vres.rq.size = val[3] - val[2] + 1;
3999 adap->vres.pbl.start = val[4];
4000 adap->vres.pbl.size = val[5] - val[4] + 1;
4002 params[0] = FW_PARAM_PFVF(SQRQ_START);
4003 params[1] = FW_PARAM_PFVF(SQRQ_END);
4004 params[2] = FW_PARAM_PFVF(CQ_START);
4005 params[3] = FW_PARAM_PFVF(CQ_END);
4006 params[4] = FW_PARAM_PFVF(OCQ_START);
4007 params[5] = FW_PARAM_PFVF(OCQ_END);
4008 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 6, params,
4012 adap->vres.qp.start = val[0];
4013 adap->vres.qp.size = val[1] - val[0] + 1;
4014 adap->vres.cq.start = val[2];
4015 adap->vres.cq.size = val[3] - val[2] + 1;
4016 adap->vres.ocq.start = val[4];
4017 adap->vres.ocq.size = val[5] - val[4] + 1;
4019 params[0] = FW_PARAM_DEV(MAXORDIRD_QP);
4020 params[1] = FW_PARAM_DEV(MAXIRD_ADAPTER);
4021 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 2, params,
4024 adap->params.max_ordird_qp = 8;
4025 adap->params.max_ird_adapter = 32 * adap->tids.ntids;
4028 adap->params.max_ordird_qp = val[0];
4029 adap->params.max_ird_adapter = val[1];
4031 dev_info(adap->pdev_dev,
4032 "max_ordird_qp %d max_ird_adapter %d\n",
4033 adap->params.max_ordird_qp,
4034 adap->params.max_ird_adapter);
4036 if (caps_cmd.iscsicaps) {
4037 params[0] = FW_PARAM_PFVF(ISCSI_START);
4038 params[1] = FW_PARAM_PFVF(ISCSI_END);
4039 ret = t4_query_params(adap, adap->mbox, adap->pf, 0, 2,
4043 adap->vres.iscsi.start = val[0];
4044 adap->vres.iscsi.size = val[1] - val[0] + 1;
4046 #undef FW_PARAM_PFVF
4049 /* The MTU/MSS Table is initialized by now, so load their values. If
4050 * we're initializing the adapter, then we'll make any modifications
4051 * we want to the MTU/MSS Table and also initialize the congestion
4054 t4_read_mtu_tbl(adap, adap->params.mtus, NULL);
4055 if (state != DEV_STATE_INIT) {
4058 /* The default MTU Table contains values 1492 and 1500.
4059 * However, for TCP, it's better to have two values which are
4060 * a multiple of 8 +/- 4 bytes apart near this popular MTU.
4061 * This allows us to have a TCP Data Payload which is a
4062 * multiple of 8 regardless of what combination of TCP Options
4063 * are in use (always a multiple of 4 bytes) which is
4064 * important for performance reasons. For instance, if no
4065 * options are in use, then we have a 20-byte IP header and a
4066 * 20-byte TCP header. In this case, a 1500-byte MSS would
4067 * result in a TCP Data Payload of 1500 - 40 == 1460 bytes
4068 * which is not a multiple of 8. So using an MSS of 1488 in
4069 * this case results in a TCP Data Payload of 1448 bytes which
4070 * is a multiple of 8. On the other hand, if 12-byte TCP Time
4071 * Stamps have been negotiated, then an MTU of 1500 bytes
4072 * results in a TCP Data Payload of 1448 bytes which, as
4073 * above, is a multiple of 8 bytes ...
4075 for (i = 0; i < NMTUS; i++)
4076 if (adap->params.mtus[i] == 1492) {
4077 adap->params.mtus[i] = 1488;
4081 t4_load_mtus(adap, adap->params.mtus, adap->params.a_wnd,
4082 adap->params.b_wnd);
4084 t4_init_sge_params(adap);
4085 adap->flags |= FW_OK;
4086 t4_init_tp_params(adap);
4090 * Something bad happened. If a command timed out or failed with EIO
4091 * FW does not operate within its spec or something catastrophic
4092 * happened to HW/FW, stop issuing commands.
4095 kfree(adap->sge.egr_map);
4096 kfree(adap->sge.ingr_map);
4097 kfree(adap->sge.starving_fl);
4098 kfree(adap->sge.txq_maperr);
4099 #ifdef CONFIG_DEBUG_FS
4100 kfree(adap->sge.blocked_fl);
4102 if (ret != -ETIMEDOUT && ret != -EIO)
4103 t4_fw_bye(adap, adap->mbox);
4109 static pci_ers_result_t eeh_err_detected(struct pci_dev *pdev,
4110 pci_channel_state_t state)
4113 struct adapter *adap = pci_get_drvdata(pdev);
4119 adap->flags &= ~FW_OK;
4120 notify_ulds(adap, CXGB4_STATE_START_RECOVERY);
4121 spin_lock(&adap->stats_lock);
4122 for_each_port(adap, i) {
4123 struct net_device *dev = adap->port[i];
4125 netif_device_detach(dev);
4126 netif_carrier_off(dev);
4128 spin_unlock(&adap->stats_lock);
4129 disable_interrupts(adap);
4130 if (adap->flags & FULL_INIT_DONE)
4133 if ((adap->flags & DEV_ENABLED)) {
4134 pci_disable_device(pdev);
4135 adap->flags &= ~DEV_ENABLED;
4137 out: return state == pci_channel_io_perm_failure ?
4138 PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET;
4141 static pci_ers_result_t eeh_slot_reset(struct pci_dev *pdev)
4144 struct fw_caps_config_cmd c;
4145 struct adapter *adap = pci_get_drvdata(pdev);
4148 pci_restore_state(pdev);
4149 pci_save_state(pdev);
4150 return PCI_ERS_RESULT_RECOVERED;
4153 if (!(adap->flags & DEV_ENABLED)) {
4154 if (pci_enable_device(pdev)) {
4155 dev_err(&pdev->dev, "Cannot reenable PCI "
4156 "device after reset\n");
4157 return PCI_ERS_RESULT_DISCONNECT;
4159 adap->flags |= DEV_ENABLED;
4162 pci_set_master(pdev);
4163 pci_restore_state(pdev);
4164 pci_save_state(pdev);
4165 pci_cleanup_aer_uncorrect_error_status(pdev);
4167 if (t4_wait_dev_ready(adap->regs) < 0)
4168 return PCI_ERS_RESULT_DISCONNECT;
4169 if (t4_fw_hello(adap, adap->mbox, adap->pf, MASTER_MUST, NULL) < 0)
4170 return PCI_ERS_RESULT_DISCONNECT;
4171 adap->flags |= FW_OK;
4172 if (adap_init1(adap, &c))
4173 return PCI_ERS_RESULT_DISCONNECT;
4175 for_each_port(adap, i) {
4176 struct port_info *p = adap2pinfo(adap, i);
4178 ret = t4_alloc_vi(adap, adap->mbox, p->tx_chan, adap->pf, 0, 1,
4181 return PCI_ERS_RESULT_DISCONNECT;
4183 p->xact_addr_filt = -1;
4186 t4_load_mtus(adap, adap->params.mtus, adap->params.a_wnd,
4187 adap->params.b_wnd);
4190 return PCI_ERS_RESULT_DISCONNECT;
4191 return PCI_ERS_RESULT_RECOVERED;
4194 static void eeh_resume(struct pci_dev *pdev)
4197 struct adapter *adap = pci_get_drvdata(pdev);
4203 for_each_port(adap, i) {
4204 struct net_device *dev = adap->port[i];
4206 if (netif_running(dev)) {
4208 cxgb_set_rxmode(dev);
4210 netif_device_attach(dev);
4215 static const struct pci_error_handlers cxgb4_eeh = {
4216 .error_detected = eeh_err_detected,
4217 .slot_reset = eeh_slot_reset,
4218 .resume = eeh_resume,
4221 static inline bool is_x_10g_port(const struct link_config *lc)
4223 return (lc->supported & FW_PORT_CAP_SPEED_10G) != 0 ||
4224 (lc->supported & FW_PORT_CAP_SPEED_40G) != 0;
4227 static inline void init_rspq(struct adapter *adap, struct sge_rspq *q,
4228 unsigned int us, unsigned int cnt,
4229 unsigned int size, unsigned int iqe_size)
4232 cxgb4_set_rspq_intr_params(q, us, cnt);
4233 q->iqe_len = iqe_size;
4238 * Perform default configuration of DMA queues depending on the number and type
4239 * of ports we found and the number of available CPUs. Most settings can be
4240 * modified by the admin prior to actual use.
4242 static void cfg_queues(struct adapter *adap)
4244 struct sge *s = &adap->sge;
4245 int i, n10g = 0, qidx = 0;
4246 #ifndef CONFIG_CHELSIO_T4_DCB
4251 for_each_port(adap, i)
4252 n10g += is_x_10g_port(&adap2pinfo(adap, i)->link_cfg);
4253 #ifdef CONFIG_CHELSIO_T4_DCB
4254 /* For Data Center Bridging support we need to be able to support up
4255 * to 8 Traffic Priorities; each of which will be assigned to its
4256 * own TX Queue in order to prevent Head-Of-Line Blocking.
4258 if (adap->params.nports * 8 > MAX_ETH_QSETS) {
4259 dev_err(adap->pdev_dev, "MAX_ETH_QSETS=%d < %d!\n",
4260 MAX_ETH_QSETS, adap->params.nports * 8);
4264 for_each_port(adap, i) {
4265 struct port_info *pi = adap2pinfo(adap, i);
4267 pi->first_qset = qidx;
4271 #else /* !CONFIG_CHELSIO_T4_DCB */
4273 * We default to 1 queue per non-10G port and up to # of cores queues
4277 q10g = (MAX_ETH_QSETS - (adap->params.nports - n10g)) / n10g;
4278 if (q10g > netif_get_num_default_rss_queues())
4279 q10g = netif_get_num_default_rss_queues();
4281 for_each_port(adap, i) {
4282 struct port_info *pi = adap2pinfo(adap, i);
4284 pi->first_qset = qidx;
4285 pi->nqsets = is_x_10g_port(&pi->link_cfg) ? q10g : 1;
4288 #endif /* !CONFIG_CHELSIO_T4_DCB */
4291 s->max_ethqsets = qidx; /* MSI-X may lower it later */
4293 if (is_offload(adap)) {
4295 * For offload we use 1 queue/channel if all ports are up to 1G,
4296 * otherwise we divide all available queues amongst the channels
4297 * capped by the number of available cores.
4300 i = min_t(int, ARRAY_SIZE(s->ofldrxq),
4302 s->ofldqsets = roundup(i, adap->params.nports);
4304 s->ofldqsets = adap->params.nports;
4305 /* For RDMA one Rx queue per channel suffices */
4306 s->rdmaqs = adap->params.nports;
4307 /* Try and allow at least 1 CIQ per cpu rounding down
4308 * to the number of ports, with a minimum of 1 per port.
4309 * A 2 port card in a 6 cpu system: 6 CIQs, 3 / port.
4310 * A 4 port card in a 6 cpu system: 4 CIQs, 1 / port.
4311 * A 4 port card in a 2 cpu system: 4 CIQs, 1 / port.
4313 s->rdmaciqs = min_t(int, MAX_RDMA_CIQS, num_online_cpus());
4314 s->rdmaciqs = (s->rdmaciqs / adap->params.nports) *
4315 adap->params.nports;
4316 s->rdmaciqs = max_t(int, s->rdmaciqs, adap->params.nports);
4319 for (i = 0; i < ARRAY_SIZE(s->ethrxq); i++) {
4320 struct sge_eth_rxq *r = &s->ethrxq[i];
4322 init_rspq(adap, &r->rspq, 5, 10, 1024, 64);
4326 for (i = 0; i < ARRAY_SIZE(s->ethtxq); i++)
4327 s->ethtxq[i].q.size = 1024;
4329 for (i = 0; i < ARRAY_SIZE(s->ctrlq); i++)
4330 s->ctrlq[i].q.size = 512;
4332 for (i = 0; i < ARRAY_SIZE(s->ofldtxq); i++)
4333 s->ofldtxq[i].q.size = 1024;
4335 for (i = 0; i < ARRAY_SIZE(s->ofldrxq); i++) {
4336 struct sge_ofld_rxq *r = &s->ofldrxq[i];
4338 init_rspq(adap, &r->rspq, 5, 1, 1024, 64);
4339 r->rspq.uld = CXGB4_ULD_ISCSI;
4343 for (i = 0; i < ARRAY_SIZE(s->rdmarxq); i++) {
4344 struct sge_ofld_rxq *r = &s->rdmarxq[i];
4346 init_rspq(adap, &r->rspq, 5, 1, 511, 64);
4347 r->rspq.uld = CXGB4_ULD_RDMA;
4351 ciq_size = 64 + adap->vres.cq.size + adap->tids.nftids;
4352 if (ciq_size > SGE_MAX_IQ_SIZE) {
4353 CH_WARN(adap, "CIQ size too small for available IQs\n");
4354 ciq_size = SGE_MAX_IQ_SIZE;
4357 for (i = 0; i < ARRAY_SIZE(s->rdmaciq); i++) {
4358 struct sge_ofld_rxq *r = &s->rdmaciq[i];
4360 init_rspq(adap, &r->rspq, 5, 1, ciq_size, 64);
4361 r->rspq.uld = CXGB4_ULD_RDMA;
4364 init_rspq(adap, &s->fw_evtq, 0, 1, 1024, 64);
4365 init_rspq(adap, &s->intrq, 0, 1, 2 * MAX_INGQ, 64);
4369 * Reduce the number of Ethernet queues across all ports to at most n.
4370 * n provides at least one queue per port.
4372 static void reduce_ethqs(struct adapter *adap, int n)
4375 struct port_info *pi;
4377 while (n < adap->sge.ethqsets)
4378 for_each_port(adap, i) {
4379 pi = adap2pinfo(adap, i);
4380 if (pi->nqsets > 1) {
4382 adap->sge.ethqsets--;
4383 if (adap->sge.ethqsets <= n)
4389 for_each_port(adap, i) {
4390 pi = adap2pinfo(adap, i);
4396 /* 2 MSI-X vectors needed for the FW queue and non-data interrupts */
4397 #define EXTRA_VECS 2
4399 static int enable_msix(struct adapter *adap)
4402 int i, want, need, allocated;
4403 struct sge *s = &adap->sge;
4404 unsigned int nchan = adap->params.nports;
4405 struct msix_entry *entries;
4407 entries = kmalloc(sizeof(*entries) * (MAX_INGQ + 1),
4412 for (i = 0; i < MAX_INGQ + 1; ++i)
4413 entries[i].entry = i;
4415 want = s->max_ethqsets + EXTRA_VECS;
4416 if (is_offload(adap)) {
4417 want += s->rdmaqs + s->rdmaciqs + s->ofldqsets;
4418 /* need nchan for each possible ULD */
4419 ofld_need = 3 * nchan;
4421 #ifdef CONFIG_CHELSIO_T4_DCB
4422 /* For Data Center Bridging we need 8 Ethernet TX Priority Queues for
4425 need = 8 * adap->params.nports + EXTRA_VECS + ofld_need;
4427 need = adap->params.nports + EXTRA_VECS + ofld_need;
4429 allocated = pci_enable_msix_range(adap->pdev, entries, need, want);
4430 if (allocated < 0) {
4431 dev_info(adap->pdev_dev, "not enough MSI-X vectors left,"
4432 " not using MSI-X\n");
4437 /* Distribute available vectors to the various queue groups.
4438 * Every group gets its minimum requirement and NIC gets top
4439 * priority for leftovers.
4441 i = allocated - EXTRA_VECS - ofld_need;
4442 if (i < s->max_ethqsets) {
4443 s->max_ethqsets = i;
4444 if (i < s->ethqsets)
4445 reduce_ethqs(adap, i);
4447 if (is_offload(adap)) {
4448 if (allocated < want) {
4450 s->rdmaciqs = nchan;
4453 /* leftovers go to OFLD */
4454 i = allocated - EXTRA_VECS - s->max_ethqsets -
4455 s->rdmaqs - s->rdmaciqs;
4456 s->ofldqsets = (i / nchan) * nchan; /* round down */
4458 for (i = 0; i < allocated; ++i)
4459 adap->msix_info[i].vec = entries[i].vector;
4467 static int init_rss(struct adapter *adap)
4472 err = t4_init_rss_mode(adap, adap->mbox);
4476 for_each_port(adap, i) {
4477 struct port_info *pi = adap2pinfo(adap, i);
4479 pi->rss = kcalloc(pi->rss_size, sizeof(u16), GFP_KERNEL);
4486 static void print_port_info(const struct net_device *dev)
4490 const char *spd = "";
4491 const struct port_info *pi = netdev_priv(dev);
4492 const struct adapter *adap = pi->adapter;
4494 if (adap->params.pci.speed == PCI_EXP_LNKSTA_CLS_2_5GB)
4496 else if (adap->params.pci.speed == PCI_EXP_LNKSTA_CLS_5_0GB)
4498 else if (adap->params.pci.speed == PCI_EXP_LNKSTA_CLS_8_0GB)
4501 if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_100M)
4502 bufp += sprintf(bufp, "100/");
4503 if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_1G)
4504 bufp += sprintf(bufp, "1000/");
4505 if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_10G)
4506 bufp += sprintf(bufp, "10G/");
4507 if (pi->link_cfg.supported & FW_PORT_CAP_SPEED_40G)
4508 bufp += sprintf(bufp, "40G/");
4511 sprintf(bufp, "BASE-%s", t4_get_port_type_description(pi->port_type));
4513 netdev_info(dev, "Chelsio %s rev %d %s %sNIC PCIe x%d%s%s\n",
4514 adap->params.vpd.id,
4515 CHELSIO_CHIP_RELEASE(adap->params.chip), buf,
4516 is_offload(adap) ? "R" : "", adap->params.pci.width, spd,
4517 (adap->flags & USING_MSIX) ? " MSI-X" :
4518 (adap->flags & USING_MSI) ? " MSI" : "");
4519 netdev_info(dev, "S/N: %s, P/N: %s\n",
4520 adap->params.vpd.sn, adap->params.vpd.pn);
4523 static void enable_pcie_relaxed_ordering(struct pci_dev *dev)
4525 pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_RELAX_EN);
4529 * Free the following resources:
4530 * - memory used for tables
4533 * - resources FW is holding for us
4535 static void free_some_resources(struct adapter *adapter)
4539 t4_free_mem(adapter->l2t);
4540 t4_free_mem(adapter->tids.tid_tab);
4541 kfree(adapter->sge.egr_map);
4542 kfree(adapter->sge.ingr_map);
4543 kfree(adapter->sge.starving_fl);
4544 kfree(adapter->sge.txq_maperr);
4545 #ifdef CONFIG_DEBUG_FS
4546 kfree(adapter->sge.blocked_fl);
4548 disable_msi(adapter);
4550 for_each_port(adapter, i)
4551 if (adapter->port[i]) {
4552 struct port_info *pi = adap2pinfo(adapter, i);
4555 t4_free_vi(adapter, adapter->mbox, adapter->pf,
4557 kfree(adap2pinfo(adapter, i)->rss);
4558 free_netdev(adapter->port[i]);
4560 if (adapter->flags & FW_OK)
4561 t4_fw_bye(adapter, adapter->pf);
4564 #define TSO_FLAGS (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
4565 #define VLAN_FEAT (NETIF_F_SG | NETIF_F_IP_CSUM | TSO_FLAGS | \
4566 NETIF_F_IPV6_CSUM | NETIF_F_HIGHDMA)
4567 #define SEGMENT_SIZE 128
4569 static int get_chip_type(struct pci_dev *pdev, u32 pl_rev)
4573 /* Retrieve adapter's device ID */
4574 pci_read_config_word(pdev, PCI_DEVICE_ID, &device_id);
4576 switch (device_id >> 12) {
4578 return CHELSIO_CHIP_CODE(CHELSIO_T4, pl_rev);
4580 return CHELSIO_CHIP_CODE(CHELSIO_T5, pl_rev);
4582 return CHELSIO_CHIP_CODE(CHELSIO_T6, pl_rev);
4584 dev_err(&pdev->dev, "Device %d is not supported\n",
4590 static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
4592 int func, i, err, s_qpp, qpp, num_seg;
4593 struct port_info *pi;
4594 bool highdma = false;
4595 struct adapter *adapter = NULL;
4598 enum chip_type chip;
4600 printk_once(KERN_INFO "%s - version %s\n", DRV_DESC, DRV_VERSION);
4602 err = pci_request_regions(pdev, KBUILD_MODNAME);
4604 /* Just info, some other driver may have claimed the device. */
4605 dev_info(&pdev->dev, "cannot obtain PCI resources\n");
4609 err = pci_enable_device(pdev);
4611 dev_err(&pdev->dev, "cannot enable PCI device\n");
4612 goto out_release_regions;
4615 regs = pci_ioremap_bar(pdev, 0);
4617 dev_err(&pdev->dev, "cannot map device registers\n");
4619 goto out_disable_device;
4622 err = t4_wait_dev_ready(regs);
4624 goto out_unmap_bar0;
4626 /* We control everything through one PF */
4627 whoami = readl(regs + PL_WHOAMI_A);
4628 pl_rev = REV_G(readl(regs + PL_REV_A));
4629 chip = get_chip_type(pdev, pl_rev);
4630 func = CHELSIO_CHIP_VERSION(chip) <= CHELSIO_T5 ?
4631 SOURCEPF_G(whoami) : T6_SOURCEPF_G(whoami);
4632 if (func != ent->driver_data) {
4634 pci_disable_device(pdev);
4635 pci_save_state(pdev); /* to restore SR-IOV later */
4639 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
4641 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
4643 dev_err(&pdev->dev, "unable to obtain 64-bit DMA for "
4644 "coherent allocations\n");
4645 goto out_unmap_bar0;
4648 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4650 dev_err(&pdev->dev, "no usable DMA configuration\n");
4651 goto out_unmap_bar0;
4655 pci_enable_pcie_error_reporting(pdev);
4656 enable_pcie_relaxed_ordering(pdev);
4657 pci_set_master(pdev);
4658 pci_save_state(pdev);
4660 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
4663 goto out_unmap_bar0;
4666 adapter->workq = create_singlethread_workqueue("cxgb4");
4667 if (!adapter->workq) {
4669 goto out_free_adapter;
4672 /* PCI device has been enabled */
4673 adapter->flags |= DEV_ENABLED;
4675 adapter->regs = regs;
4676 adapter->pdev = pdev;
4677 adapter->pdev_dev = &pdev->dev;
4678 adapter->mbox = func;
4680 adapter->msg_enable = dflt_msg_enable;
4681 memset(adapter->chan_map, 0xff, sizeof(adapter->chan_map));
4683 spin_lock_init(&adapter->stats_lock);
4684 spin_lock_init(&adapter->tid_release_lock);
4685 spin_lock_init(&adapter->win0_lock);
4687 INIT_WORK(&adapter->tid_release_task, process_tid_release_list);
4688 INIT_WORK(&adapter->db_full_task, process_db_full);
4689 INIT_WORK(&adapter->db_drop_task, process_db_drop);
4691 err = t4_prep_adapter(adapter);
4693 goto out_free_adapter;
4696 if (!is_t4(adapter->params.chip)) {
4697 s_qpp = (QUEUESPERPAGEPF0_S +
4698 (QUEUESPERPAGEPF1_S - QUEUESPERPAGEPF0_S) *
4700 qpp = 1 << QUEUESPERPAGEPF0_G(t4_read_reg(adapter,
4701 SGE_EGRESS_QUEUES_PER_PAGE_PF_A) >> s_qpp);
4702 num_seg = PAGE_SIZE / SEGMENT_SIZE;
4704 /* Each segment size is 128B. Write coalescing is enabled only
4705 * when SGE_EGRESS_QUEUES_PER_PAGE_PF reg value for the
4706 * queue is less no of segments that can be accommodated in
4709 if (qpp > num_seg) {
4711 "Incorrect number of egress queues per page\n");
4713 goto out_free_adapter;
4715 adapter->bar2 = ioremap_wc(pci_resource_start(pdev, 2),
4716 pci_resource_len(pdev, 2));
4717 if (!adapter->bar2) {
4718 dev_err(&pdev->dev, "cannot map device bar2 region\n");
4720 goto out_free_adapter;
4724 setup_memwin(adapter);
4725 err = adap_init0(adapter);
4726 #ifdef CONFIG_DEBUG_FS
4727 bitmap_zero(adapter->sge.blocked_fl, adapter->sge.egr_sz);
4729 setup_memwin_rdma(adapter);
4733 /* configure SGE_STAT_CFG_A to read WC stats */
4734 if (!is_t4(adapter->params.chip))
4735 t4_write_reg(adapter, SGE_STAT_CFG_A,
4736 STATSOURCE_T5_V(7) | STATMODE_V(0));
4738 for_each_port(adapter, i) {
4739 struct net_device *netdev;
4741 netdev = alloc_etherdev_mq(sizeof(struct port_info),
4748 SET_NETDEV_DEV(netdev, &pdev->dev);
4750 adapter->port[i] = netdev;
4751 pi = netdev_priv(netdev);
4752 pi->adapter = adapter;
4753 pi->xact_addr_filt = -1;
4755 netdev->irq = pdev->irq;
4757 netdev->hw_features = NETIF_F_SG | TSO_FLAGS |
4758 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
4759 NETIF_F_RXCSUM | NETIF_F_RXHASH |
4760 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
4762 netdev->hw_features |= NETIF_F_HIGHDMA;
4763 netdev->features |= netdev->hw_features;
4764 netdev->vlan_features = netdev->features & VLAN_FEAT;
4766 netdev->priv_flags |= IFF_UNICAST_FLT;
4768 netdev->netdev_ops = &cxgb4_netdev_ops;
4769 #ifdef CONFIG_CHELSIO_T4_DCB
4770 netdev->dcbnl_ops = &cxgb4_dcb_ops;
4771 cxgb4_dcb_state_init(netdev);
4773 cxgb4_set_ethtool_ops(netdev);
4776 pci_set_drvdata(pdev, adapter);
4778 if (adapter->flags & FW_OK) {
4779 err = t4_port_init(adapter, func, func, 0);
4782 } else if (adapter->params.nports == 1) {
4783 /* If we don't have a connection to the firmware -- possibly
4784 * because of an error -- grab the raw VPD parameters so we
4785 * can set the proper MAC Address on the debug network
4786 * interface that we've created.
4788 u8 hw_addr[ETH_ALEN];
4789 u8 *na = adapter->params.vpd.na;
4791 err = t4_get_raw_vpd_params(adapter, &adapter->params.vpd);
4793 for (i = 0; i < ETH_ALEN; i++)
4794 hw_addr[i] = (hex2val(na[2 * i + 0]) * 16 +
4795 hex2val(na[2 * i + 1]));
4796 t4_set_hw_addr(adapter, 0, hw_addr);
4800 /* Configure queues and allocate tables now, they can be needed as
4801 * soon as the first register_netdev completes.
4803 cfg_queues(adapter);
4805 adapter->l2t = t4_init_l2t(adapter->l2t_start, adapter->l2t_end);
4806 if (!adapter->l2t) {
4807 /* We tolerate a lack of L2T, giving up some functionality */
4808 dev_warn(&pdev->dev, "could not allocate L2T, continuing\n");
4809 adapter->params.offload = 0;
4812 #if IS_ENABLED(CONFIG_IPV6)
4813 adapter->clipt = t4_init_clip_tbl(adapter->clipt_start,
4814 adapter->clipt_end);
4815 if (!adapter->clipt) {
4816 /* We tolerate a lack of clip_table, giving up
4817 * some functionality
4819 dev_warn(&pdev->dev,
4820 "could not allocate Clip table, continuing\n");
4821 adapter->params.offload = 0;
4824 if (is_offload(adapter) && tid_init(&adapter->tids) < 0) {
4825 dev_warn(&pdev->dev, "could not allocate TID table, "
4827 adapter->params.offload = 0;
4830 if (is_offload(adapter)) {
4831 if (t4_read_reg(adapter, LE_DB_CONFIG_A) & HASHEN_F) {
4832 u32 hash_base, hash_reg;
4834 if (chip <= CHELSIO_T5) {
4835 hash_reg = LE_DB_TID_HASHBASE_A;
4836 hash_base = t4_read_reg(adapter, hash_reg);
4837 adapter->tids.hash_base = hash_base / 4;
4839 hash_reg = T6_LE_DB_HASH_TID_BASE_A;
4840 hash_base = t4_read_reg(adapter, hash_reg);
4841 adapter->tids.hash_base = hash_base;
4846 /* See what interrupts we'll be using */
4847 if (msi > 1 && enable_msix(adapter) == 0)
4848 adapter->flags |= USING_MSIX;
4849 else if (msi > 0 && pci_enable_msi(pdev) == 0)
4850 adapter->flags |= USING_MSI;
4852 err = init_rss(adapter);
4857 * The card is now ready to go. If any errors occur during device
4858 * registration we do not fail the whole card but rather proceed only
4859 * with the ports we manage to register successfully. However we must
4860 * register at least one net device.
4862 for_each_port(adapter, i) {
4863 pi = adap2pinfo(adapter, i);
4864 netif_set_real_num_tx_queues(adapter->port[i], pi->nqsets);
4865 netif_set_real_num_rx_queues(adapter->port[i], pi->nqsets);
4867 err = register_netdev(adapter->port[i]);
4870 adapter->chan_map[pi->tx_chan] = i;
4871 print_port_info(adapter->port[i]);
4874 dev_err(&pdev->dev, "could not register any net devices\n");
4878 dev_warn(&pdev->dev, "only %d net devices registered\n", i);
4882 if (cxgb4_debugfs_root) {
4883 adapter->debugfs_root = debugfs_create_dir(pci_name(pdev),
4884 cxgb4_debugfs_root);
4885 setup_debugfs(adapter);
4888 /* PCIe EEH recovery on powerpc platforms needs fundamental reset */
4889 pdev->needs_freset = 1;
4891 if (is_offload(adapter))
4892 attach_ulds(adapter);
4895 #ifdef CONFIG_PCI_IOV
4896 if (func < ARRAY_SIZE(num_vf) && num_vf[func] > 0)
4897 if (pci_enable_sriov(pdev, num_vf[func]) == 0)
4898 dev_info(&pdev->dev,
4899 "instantiated %u virtual functions\n",
4905 free_some_resources(adapter);
4907 if (!is_t4(adapter->params.chip))
4908 iounmap(adapter->bar2);
4911 destroy_workqueue(adapter->workq);
4917 pci_disable_pcie_error_reporting(pdev);
4918 pci_disable_device(pdev);
4919 out_release_regions:
4920 pci_release_regions(pdev);
4924 static void remove_one(struct pci_dev *pdev)
4926 struct adapter *adapter = pci_get_drvdata(pdev);
4928 #ifdef CONFIG_PCI_IOV
4929 pci_disable_sriov(pdev);
4936 /* Tear down per-adapter Work Queue first since it can contain
4937 * references to our adapter data structure.
4939 destroy_workqueue(adapter->workq);
4941 if (is_offload(adapter))
4942 detach_ulds(adapter);
4944 disable_interrupts(adapter);
4946 for_each_port(adapter, i)
4947 if (adapter->port[i]->reg_state == NETREG_REGISTERED)
4948 unregister_netdev(adapter->port[i]);
4950 debugfs_remove_recursive(adapter->debugfs_root);
4952 /* If we allocated filters, free up state associated with any
4955 if (adapter->tids.ftid_tab) {
4956 struct filter_entry *f = &adapter->tids.ftid_tab[0];
4957 for (i = 0; i < (adapter->tids.nftids +
4958 adapter->tids.nsftids); i++, f++)
4960 clear_filter(adapter, f);
4963 if (adapter->flags & FULL_INIT_DONE)
4966 free_some_resources(adapter);
4967 #if IS_ENABLED(CONFIG_IPV6)
4968 t4_cleanup_clip_tbl(adapter);
4970 iounmap(adapter->regs);
4971 if (!is_t4(adapter->params.chip))
4972 iounmap(adapter->bar2);
4973 pci_disable_pcie_error_reporting(pdev);
4974 if ((adapter->flags & DEV_ENABLED)) {
4975 pci_disable_device(pdev);
4976 adapter->flags &= ~DEV_ENABLED;
4978 pci_release_regions(pdev);
4982 pci_release_regions(pdev);
4985 static struct pci_driver cxgb4_driver = {
4986 .name = KBUILD_MODNAME,
4987 .id_table = cxgb4_pci_tbl,
4989 .remove = remove_one,
4990 .shutdown = remove_one,
4991 .err_handler = &cxgb4_eeh,
4994 static int __init cxgb4_init_module(void)
4998 /* Debugfs support is optional, just warn if this fails */
4999 cxgb4_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
5000 if (!cxgb4_debugfs_root)
5001 pr_warn("could not create debugfs entry, continuing\n");
5003 ret = pci_register_driver(&cxgb4_driver);
5005 debugfs_remove(cxgb4_debugfs_root);
5007 #if IS_ENABLED(CONFIG_IPV6)
5008 if (!inet6addr_registered) {
5009 register_inet6addr_notifier(&cxgb4_inet6addr_notifier);
5010 inet6addr_registered = true;
5017 static void __exit cxgb4_cleanup_module(void)
5019 #if IS_ENABLED(CONFIG_IPV6)
5020 if (inet6addr_registered) {
5021 unregister_inet6addr_notifier(&cxgb4_inet6addr_notifier);
5022 inet6addr_registered = false;
5025 pci_unregister_driver(&cxgb4_driver);
5026 debugfs_remove(cxgb4_debugfs_root); /* NULL ok */
5029 module_init(cxgb4_init_module);
5030 module_exit(cxgb4_cleanup_module);