2 * This file is part of the Chelsio T4 PCI-E SR-IOV Virtual Function Ethernet
5 * Copyright (c) 2009-2010 Chelsio Communications, Inc. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
38 #include <linux/module.h>
39 #include <linux/moduleparam.h>
40 #include <linux/init.h>
41 #include <linux/pci.h>
42 #include <linux/dma-mapping.h>
43 #include <linux/netdevice.h>
44 #include <linux/etherdevice.h>
45 #include <linux/debugfs.h>
46 #include <linux/ethtool.h>
48 #include "t4vf_common.h"
49 #include "t4vf_defs.h"
51 #include "../cxgb4/t4_regs.h"
52 #include "../cxgb4/t4_msg.h"
55 * Generic information about the driver.
57 #define DRV_VERSION "2.0.0-ko"
58 #define DRV_DESC "Chelsio T4/T5 Virtual Function (VF) Network Driver"
66 * Default ethtool "message level" for adapters.
68 #define DFLT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | \
69 NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP |\
70 NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)
72 static int dflt_msg_enable
= DFLT_MSG_ENABLE
;
74 module_param(dflt_msg_enable
, int, 0644);
75 MODULE_PARM_DESC(dflt_msg_enable
,
76 "default adapter ethtool message level bitmap");
79 * The driver uses the best interrupt scheme available on a platform in the
80 * order MSI-X then MSI. This parameter determines which of these schemes the
81 * driver may consider as follows:
83 * msi = 2: choose from among MSI-X and MSI
84 * msi = 1: only consider MSI interrupts
86 * Note that unlike the Physical Function driver, this Virtual Function driver
87 * does _not_ support legacy INTx interrupts (this limitation is mandated by
88 * the PCI-E SR-IOV standard).
92 #define MSI_DEFAULT MSI_MSIX
94 static int msi
= MSI_DEFAULT
;
96 module_param(msi
, int, 0644);
97 MODULE_PARM_DESC(msi
, "whether to use MSI-X or MSI");
100 * Fundamental constants.
101 * ======================
105 MAX_TXQ_ENTRIES
= 16384,
106 MAX_RSPQ_ENTRIES
= 16384,
107 MAX_RX_BUFFERS
= 16384,
109 MIN_TXQ_ENTRIES
= 32,
110 MIN_RSPQ_ENTRIES
= 128,
114 * For purposes of manipulating the Free List size we need to
115 * recognize that Free Lists are actually Egress Queues (the host
116 * produces free buffers which the hardware consumes), Egress Queues
117 * indices are all in units of Egress Context Units bytes, and free
118 * list entries are 64-bit PCI DMA addresses. And since the state of
119 * the Producer Index == the Consumer Index implies an EMPTY list, we
120 * always have at least one Egress Unit's worth of Free List entries
121 * unused. See sge.c for more details ...
123 EQ_UNIT
= SGE_EQ_IDXSIZE
,
124 FL_PER_EQ_UNIT
= EQ_UNIT
/ sizeof(__be64
),
125 MIN_FL_RESID
= FL_PER_EQ_UNIT
,
129 * Global driver state.
130 * ====================
133 static struct dentry
*cxgb4vf_debugfs_root
;
136 * OS "Callback" functions.
137 * ========================
141 * The link status has changed on the indicated "port" (Virtual Interface).
143 void t4vf_os_link_changed(struct adapter
*adapter
, int pidx
, int link_ok
)
145 struct net_device
*dev
= adapter
->port
[pidx
];
148 * If the port is disabled or the current recorded "link up"
149 * status matches the new status, just return.
151 if (!netif_running(dev
) || link_ok
== netif_carrier_ok(dev
))
155 * Tell the OS that the link status has changed and print a short
156 * informative message on the console about the event.
161 const struct port_info
*pi
= netdev_priv(dev
);
163 netif_carrier_on(dev
);
165 switch (pi
->link_cfg
.speed
) {
183 switch (pi
->link_cfg
.fc
) {
192 case PAUSE_RX
|PAUSE_TX
:
201 netdev_info(dev
, "link up, %s, full-duplex, %s PAUSE\n", s
, fc
);
203 netif_carrier_off(dev
);
204 netdev_info(dev
, "link down\n");
209 * Net device operations.
210 * ======================
217 * Perform the MAC and PHY actions needed to enable a "port" (Virtual
220 static int link_start(struct net_device
*dev
)
223 struct port_info
*pi
= netdev_priv(dev
);
226 * We do not set address filters and promiscuity here, the stack does
227 * that step explicitly. Enable vlan accel.
229 ret
= t4vf_set_rxmode(pi
->adapter
, pi
->viid
, dev
->mtu
, -1, -1, -1, 1,
232 ret
= t4vf_change_mac(pi
->adapter
, pi
->viid
,
233 pi
->xact_addr_filt
, dev
->dev_addr
, true);
235 pi
->xact_addr_filt
= ret
;
241 * We don't need to actually "start the link" itself since the
242 * firmware will do that for us when the first Virtual Interface
243 * is enabled on a port.
246 ret
= t4vf_enable_vi(pi
->adapter
, pi
->viid
, true, true);
251 * Name the MSI-X interrupts.
253 static void name_msix_vecs(struct adapter
*adapter
)
255 int namelen
= sizeof(adapter
->msix_info
[0].desc
) - 1;
261 snprintf(adapter
->msix_info
[MSIX_FW
].desc
, namelen
,
262 "%s-FWeventq", adapter
->name
);
263 adapter
->msix_info
[MSIX_FW
].desc
[namelen
] = 0;
268 for_each_port(adapter
, pidx
) {
269 struct net_device
*dev
= adapter
->port
[pidx
];
270 const struct port_info
*pi
= netdev_priv(dev
);
273 for (qs
= 0, msi
= MSIX_IQFLINT
; qs
< pi
->nqsets
; qs
++, msi
++) {
274 snprintf(adapter
->msix_info
[msi
].desc
, namelen
,
275 "%s-%d", dev
->name
, qs
);
276 adapter
->msix_info
[msi
].desc
[namelen
] = 0;
282 * Request all of our MSI-X resources.
284 static int request_msix_queue_irqs(struct adapter
*adapter
)
286 struct sge
*s
= &adapter
->sge
;
292 err
= request_irq(adapter
->msix_info
[MSIX_FW
].vec
, t4vf_sge_intr_msix
,
293 0, adapter
->msix_info
[MSIX_FW
].desc
, &s
->fw_evtq
);
301 for_each_ethrxq(s
, rxq
) {
302 err
= request_irq(adapter
->msix_info
[msi
].vec
,
303 t4vf_sge_intr_msix
, 0,
304 adapter
->msix_info
[msi
].desc
,
305 &s
->ethrxq
[rxq
].rspq
);
314 free_irq(adapter
->msix_info
[--msi
].vec
, &s
->ethrxq
[rxq
].rspq
);
315 free_irq(adapter
->msix_info
[MSIX_FW
].vec
, &s
->fw_evtq
);
320 * Free our MSI-X resources.
322 static void free_msix_queue_irqs(struct adapter
*adapter
)
324 struct sge
*s
= &adapter
->sge
;
327 free_irq(adapter
->msix_info
[MSIX_FW
].vec
, &s
->fw_evtq
);
329 for_each_ethrxq(s
, rxq
)
330 free_irq(adapter
->msix_info
[msi
++].vec
,
331 &s
->ethrxq
[rxq
].rspq
);
335 * Turn on NAPI and start up interrupts on a response queue.
337 static void qenable(struct sge_rspq
*rspq
)
339 napi_enable(&rspq
->napi
);
342 * 0-increment the Going To Sleep register to start the timer and
345 t4_write_reg(rspq
->adapter
, T4VF_SGE_BASE_ADDR
+ SGE_VF_GTS
,
347 SEINTARM(rspq
->intr_params
) |
348 INGRESSQID(rspq
->cntxt_id
));
352 * Enable NAPI scheduling and interrupt generation for all Receive Queues.
354 static void enable_rx(struct adapter
*adapter
)
357 struct sge
*s
= &adapter
->sge
;
359 for_each_ethrxq(s
, rxq
)
360 qenable(&s
->ethrxq
[rxq
].rspq
);
361 qenable(&s
->fw_evtq
);
364 * The interrupt queue doesn't use NAPI so we do the 0-increment of
365 * its Going To Sleep register here to get it started.
367 if (adapter
->flags
& USING_MSI
)
368 t4_write_reg(adapter
, T4VF_SGE_BASE_ADDR
+ SGE_VF_GTS
,
370 SEINTARM(s
->intrq
.intr_params
) |
371 INGRESSQID(s
->intrq
.cntxt_id
));
376 * Wait until all NAPI handlers are descheduled.
378 static void quiesce_rx(struct adapter
*adapter
)
380 struct sge
*s
= &adapter
->sge
;
383 for_each_ethrxq(s
, rxq
)
384 napi_disable(&s
->ethrxq
[rxq
].rspq
.napi
);
385 napi_disable(&s
->fw_evtq
.napi
);
389 * Response queue handler for the firmware event queue.
391 static int fwevtq_handler(struct sge_rspq
*rspq
, const __be64
*rsp
,
392 const struct pkt_gl
*gl
)
395 * Extract response opcode and get pointer to CPL message body.
397 struct adapter
*adapter
= rspq
->adapter
;
398 u8 opcode
= ((const struct rss_header
*)rsp
)->opcode
;
399 void *cpl
= (void *)(rsp
+ 1);
404 * We've received an asynchronous message from the firmware.
406 const struct cpl_fw6_msg
*fw_msg
= cpl
;
407 if (fw_msg
->type
== FW6_TYPE_CMD_RPL
)
408 t4vf_handle_fw_rpl(adapter
, fw_msg
->data
);
412 case CPL_SGE_EGR_UPDATE
: {
414 * We've received an Egress Queue Status Update message. We
415 * get these, if the SGE is configured to send these when the
416 * firmware passes certain points in processing our TX
417 * Ethernet Queue or if we make an explicit request for one.
418 * We use these updates to determine when we may need to
419 * restart a TX Ethernet Queue which was stopped for lack of
420 * free TX Queue Descriptors ...
422 const struct cpl_sge_egr_update
*p
= cpl
;
423 unsigned int qid
= EGR_QID(be32_to_cpu(p
->opcode_qid
));
424 struct sge
*s
= &adapter
->sge
;
426 struct sge_eth_txq
*txq
;
430 * Perform sanity checking on the Queue ID to make sure it
431 * really refers to one of our TX Ethernet Egress Queues which
432 * is active and matches the queue's ID. None of these error
433 * conditions should ever happen so we may want to either make
434 * them fatal and/or conditionalized under DEBUG.
436 eq_idx
= EQ_IDX(s
, qid
);
437 if (unlikely(eq_idx
>= MAX_EGRQ
)) {
438 dev_err(adapter
->pdev_dev
,
439 "Egress Update QID %d out of range\n", qid
);
442 tq
= s
->egr_map
[eq_idx
];
443 if (unlikely(tq
== NULL
)) {
444 dev_err(adapter
->pdev_dev
,
445 "Egress Update QID %d TXQ=NULL\n", qid
);
448 txq
= container_of(tq
, struct sge_eth_txq
, q
);
449 if (unlikely(tq
->abs_id
!= qid
)) {
450 dev_err(adapter
->pdev_dev
,
451 "Egress Update QID %d refers to TXQ %d\n",
457 * Restart a stopped TX Queue which has less than half of its
461 netif_tx_wake_queue(txq
->txq
);
466 dev_err(adapter
->pdev_dev
,
467 "unexpected CPL %#x on FW event queue\n", opcode
);
474 * Allocate SGE TX/RX response queues. Determine how many sets of SGE queues
475 * to use and initializes them. We support multiple "Queue Sets" per port if
476 * we have MSI-X, otherwise just one queue set per port.
478 static int setup_sge_queues(struct adapter
*adapter
)
480 struct sge
*s
= &adapter
->sge
;
484 * Clear "Queue Set" Free List Starving and TX Queue Mapping Error
487 bitmap_zero(s
->starving_fl
, MAX_EGRQ
);
490 * If we're using MSI interrupt mode we need to set up a "forwarded
491 * interrupt" queue which we'll set up with our MSI vector. The rest
492 * of the ingress queues will be set up to forward their interrupts to
493 * this queue ... This must be first since t4vf_sge_alloc_rxq() uses
494 * the intrq's queue ID as the interrupt forwarding queue for the
495 * subsequent calls ...
497 if (adapter
->flags
& USING_MSI
) {
498 err
= t4vf_sge_alloc_rxq(adapter
, &s
->intrq
, false,
499 adapter
->port
[0], 0, NULL
, NULL
);
501 goto err_free_queues
;
505 * Allocate our ingress queue for asynchronous firmware messages.
507 err
= t4vf_sge_alloc_rxq(adapter
, &s
->fw_evtq
, true, adapter
->port
[0],
508 MSIX_FW
, NULL
, fwevtq_handler
);
510 goto err_free_queues
;
513 * Allocate each "port"'s initial Queue Sets. These can be changed
514 * later on ... up to the point where any interface on the adapter is
515 * brought up at which point lots of things get nailed down
519 for_each_port(adapter
, pidx
) {
520 struct net_device
*dev
= adapter
->port
[pidx
];
521 struct port_info
*pi
= netdev_priv(dev
);
522 struct sge_eth_rxq
*rxq
= &s
->ethrxq
[pi
->first_qset
];
523 struct sge_eth_txq
*txq
= &s
->ethtxq
[pi
->first_qset
];
526 for (qs
= 0; qs
< pi
->nqsets
; qs
++, rxq
++, txq
++) {
527 err
= t4vf_sge_alloc_rxq(adapter
, &rxq
->rspq
, false,
529 &rxq
->fl
, t4vf_ethrx_handler
);
531 goto err_free_queues
;
533 err
= t4vf_sge_alloc_eth_txq(adapter
, txq
, dev
,
534 netdev_get_tx_queue(dev
, qs
),
535 s
->fw_evtq
.cntxt_id
);
537 goto err_free_queues
;
540 memset(&rxq
->stats
, 0, sizeof(rxq
->stats
));
545 * Create the reverse mappings for the queues.
547 s
->egr_base
= s
->ethtxq
[0].q
.abs_id
- s
->ethtxq
[0].q
.cntxt_id
;
548 s
->ingr_base
= s
->ethrxq
[0].rspq
.abs_id
- s
->ethrxq
[0].rspq
.cntxt_id
;
549 IQ_MAP(s
, s
->fw_evtq
.abs_id
) = &s
->fw_evtq
;
550 for_each_port(adapter
, pidx
) {
551 struct net_device
*dev
= adapter
->port
[pidx
];
552 struct port_info
*pi
= netdev_priv(dev
);
553 struct sge_eth_rxq
*rxq
= &s
->ethrxq
[pi
->first_qset
];
554 struct sge_eth_txq
*txq
= &s
->ethtxq
[pi
->first_qset
];
557 for (qs
= 0; qs
< pi
->nqsets
; qs
++, rxq
++, txq
++) {
558 IQ_MAP(s
, rxq
->rspq
.abs_id
) = &rxq
->rspq
;
559 EQ_MAP(s
, txq
->q
.abs_id
) = &txq
->q
;
562 * The FW_IQ_CMD doesn't return the Absolute Queue IDs
563 * for Free Lists but since all of the Egress Queues
564 * (including Free Lists) have Relative Queue IDs
565 * which are computed as Absolute - Base Queue ID, we
566 * can synthesize the Absolute Queue IDs for the Free
567 * Lists. This is useful for debugging purposes when
568 * we want to dump Queue Contexts via the PF Driver.
570 rxq
->fl
.abs_id
= rxq
->fl
.cntxt_id
+ s
->egr_base
;
571 EQ_MAP(s
, rxq
->fl
.abs_id
) = &rxq
->fl
;
577 t4vf_free_sge_resources(adapter
);
582 * Set up Receive Side Scaling (RSS) to distribute packets to multiple receive
583 * queues. We configure the RSS CPU lookup table to distribute to the number
584 * of HW receive queues, and the response queue lookup table to narrow that
585 * down to the response queues actually configured for each "port" (Virtual
586 * Interface). We always configure the RSS mapping for all ports since the
587 * mapping table has plenty of entries.
589 static int setup_rss(struct adapter
*adapter
)
593 for_each_port(adapter
, pidx
) {
594 struct port_info
*pi
= adap2pinfo(adapter
, pidx
);
595 struct sge_eth_rxq
*rxq
= &adapter
->sge
.ethrxq
[pi
->first_qset
];
596 u16 rss
[MAX_PORT_QSETS
];
599 for (qs
= 0; qs
< pi
->nqsets
; qs
++)
600 rss
[qs
] = rxq
[qs
].rspq
.abs_id
;
602 err
= t4vf_config_rss_range(adapter
, pi
->viid
,
603 0, pi
->rss_size
, rss
, pi
->nqsets
);
608 * Perform Global RSS Mode-specific initialization.
610 switch (adapter
->params
.rss
.mode
) {
611 case FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL
:
613 * If Tunnel All Lookup isn't specified in the global
614 * RSS Configuration, then we need to specify a
615 * default Ingress Queue for any ingress packets which
616 * aren't hashed. We'll use our first ingress queue
619 if (!adapter
->params
.rss
.u
.basicvirtual
.tnlalllookup
) {
620 union rss_vi_config config
;
621 err
= t4vf_read_rss_vi_config(adapter
,
626 config
.basicvirtual
.defaultq
=
628 err
= t4vf_write_rss_vi_config(adapter
,
642 * Bring the adapter up. Called whenever we go from no "ports" open to having
643 * one open. This function performs the actions necessary to make an adapter
644 * operational, such as completing the initialization of HW modules, and
645 * enabling interrupts. Must be called with the rtnl lock held. (Note that
646 * this is called "cxgb_up" in the PF Driver.)
648 static int adapter_up(struct adapter
*adapter
)
653 * If this is the first time we've been called, perform basic
654 * adapter setup. Once we've done this, many of our adapter
655 * parameters can no longer be changed ...
657 if ((adapter
->flags
& FULL_INIT_DONE
) == 0) {
658 err
= setup_sge_queues(adapter
);
661 err
= setup_rss(adapter
);
663 t4vf_free_sge_resources(adapter
);
667 if (adapter
->flags
& USING_MSIX
)
668 name_msix_vecs(adapter
);
669 adapter
->flags
|= FULL_INIT_DONE
;
673 * Acquire our interrupt resources. We only support MSI-X and MSI.
675 BUG_ON((adapter
->flags
& (USING_MSIX
|USING_MSI
)) == 0);
676 if (adapter
->flags
& USING_MSIX
)
677 err
= request_msix_queue_irqs(adapter
);
679 err
= request_irq(adapter
->pdev
->irq
,
680 t4vf_intr_handler(adapter
), 0,
681 adapter
->name
, adapter
);
683 dev_err(adapter
->pdev_dev
, "request_irq failed, err %d\n",
689 * Enable NAPI ingress processing and return success.
692 t4vf_sge_start(adapter
);
697 * Bring the adapter down. Called whenever the last "port" (Virtual
698 * Interface) closed. (Note that this routine is called "cxgb_down" in the PF
701 static void adapter_down(struct adapter
*adapter
)
704 * Free interrupt resources.
706 if (adapter
->flags
& USING_MSIX
)
707 free_msix_queue_irqs(adapter
);
709 free_irq(adapter
->pdev
->irq
, adapter
);
712 * Wait for NAPI handlers to finish.
718 * Start up a net device.
720 static int cxgb4vf_open(struct net_device
*dev
)
723 struct port_info
*pi
= netdev_priv(dev
);
724 struct adapter
*adapter
= pi
->adapter
;
727 * If this is the first interface that we're opening on the "adapter",
728 * bring the "adapter" up now.
730 if (adapter
->open_device_map
== 0) {
731 err
= adapter_up(adapter
);
737 * Note that this interface is up and start everything up ...
739 netif_set_real_num_tx_queues(dev
, pi
->nqsets
);
740 err
= netif_set_real_num_rx_queues(dev
, pi
->nqsets
);
743 err
= link_start(dev
);
747 netif_tx_start_all_queues(dev
);
748 set_bit(pi
->port_id
, &adapter
->open_device_map
);
752 if (adapter
->open_device_map
== 0)
753 adapter_down(adapter
);
758 * Shut down a net device. This routine is called "cxgb_close" in the PF
761 static int cxgb4vf_stop(struct net_device
*dev
)
763 struct port_info
*pi
= netdev_priv(dev
);
764 struct adapter
*adapter
= pi
->adapter
;
766 netif_tx_stop_all_queues(dev
);
767 netif_carrier_off(dev
);
768 t4vf_enable_vi(adapter
, pi
->viid
, false, false);
769 pi
->link_cfg
.link_ok
= 0;
771 clear_bit(pi
->port_id
, &adapter
->open_device_map
);
772 if (adapter
->open_device_map
== 0)
773 adapter_down(adapter
);
778 * Translate our basic statistics into the standard "ifconfig" statistics.
780 static struct net_device_stats
*cxgb4vf_get_stats(struct net_device
*dev
)
782 struct t4vf_port_stats stats
;
783 struct port_info
*pi
= netdev2pinfo(dev
);
784 struct adapter
*adapter
= pi
->adapter
;
785 struct net_device_stats
*ns
= &dev
->stats
;
788 spin_lock(&adapter
->stats_lock
);
789 err
= t4vf_get_port_stats(adapter
, pi
->pidx
, &stats
);
790 spin_unlock(&adapter
->stats_lock
);
792 memset(ns
, 0, sizeof(*ns
));
796 ns
->tx_bytes
= (stats
.tx_bcast_bytes
+ stats
.tx_mcast_bytes
+
797 stats
.tx_ucast_bytes
+ stats
.tx_offload_bytes
);
798 ns
->tx_packets
= (stats
.tx_bcast_frames
+ stats
.tx_mcast_frames
+
799 stats
.tx_ucast_frames
+ stats
.tx_offload_frames
);
800 ns
->rx_bytes
= (stats
.rx_bcast_bytes
+ stats
.rx_mcast_bytes
+
801 stats
.rx_ucast_bytes
);
802 ns
->rx_packets
= (stats
.rx_bcast_frames
+ stats
.rx_mcast_frames
+
803 stats
.rx_ucast_frames
);
804 ns
->multicast
= stats
.rx_mcast_frames
;
805 ns
->tx_errors
= stats
.tx_drop_frames
;
806 ns
->rx_errors
= stats
.rx_err_frames
;
812 * Collect up to maxaddrs worth of a netdevice's unicast addresses, starting
813 * at a specified offset within the list, into an array of addrss pointers and
814 * return the number collected.
816 static inline unsigned int collect_netdev_uc_list_addrs(const struct net_device
*dev
,
819 unsigned int maxaddrs
)
821 unsigned int index
= 0;
822 unsigned int naddr
= 0;
823 const struct netdev_hw_addr
*ha
;
825 for_each_dev_addr(dev
, ha
)
826 if (index
++ >= offset
) {
827 addr
[naddr
++] = ha
->addr
;
828 if (naddr
>= maxaddrs
)
835 * Collect up to maxaddrs worth of a netdevice's multicast addresses, starting
836 * at a specified offset within the list, into an array of addrss pointers and
837 * return the number collected.
839 static inline unsigned int collect_netdev_mc_list_addrs(const struct net_device
*dev
,
842 unsigned int maxaddrs
)
844 unsigned int index
= 0;
845 unsigned int naddr
= 0;
846 const struct netdev_hw_addr
*ha
;
848 netdev_for_each_mc_addr(ha
, dev
)
849 if (index
++ >= offset
) {
850 addr
[naddr
++] = ha
->addr
;
851 if (naddr
>= maxaddrs
)
858 * Configure the exact and hash address filters to handle a port's multicast
859 * and secondary unicast MAC addresses.
861 static int set_addr_filters(const struct net_device
*dev
, bool sleep
)
866 unsigned int offset
, naddr
;
869 const struct port_info
*pi
= netdev_priv(dev
);
871 /* first do the secondary unicast addresses */
872 for (offset
= 0; ; offset
+= naddr
) {
873 naddr
= collect_netdev_uc_list_addrs(dev
, addr
, offset
,
878 ret
= t4vf_alloc_mac_filt(pi
->adapter
, pi
->viid
, free
,
879 naddr
, addr
, NULL
, &uhash
, sleep
);
886 /* next set up the multicast addresses */
887 for (offset
= 0; ; offset
+= naddr
) {
888 naddr
= collect_netdev_mc_list_addrs(dev
, addr
, offset
,
893 ret
= t4vf_alloc_mac_filt(pi
->adapter
, pi
->viid
, free
,
894 naddr
, addr
, NULL
, &mhash
, sleep
);
900 return t4vf_set_addr_hash(pi
->adapter
, pi
->viid
, uhash
!= 0,
901 uhash
| mhash
, sleep
);
905 * Set RX properties of a port, such as promiscruity, address filters, and MTU.
906 * If @mtu is -1 it is left unchanged.
908 static int set_rxmode(struct net_device
*dev
, int mtu
, bool sleep_ok
)
911 struct port_info
*pi
= netdev_priv(dev
);
913 ret
= set_addr_filters(dev
, sleep_ok
);
915 ret
= t4vf_set_rxmode(pi
->adapter
, pi
->viid
, -1,
916 (dev
->flags
& IFF_PROMISC
) != 0,
917 (dev
->flags
& IFF_ALLMULTI
) != 0,
923 * Set the current receive modes on the device.
925 static void cxgb4vf_set_rxmode(struct net_device
*dev
)
927 /* unfortunately we can't return errors to the stack */
928 set_rxmode(dev
, -1, false);
932 * Find the entry in the interrupt holdoff timer value array which comes
933 * closest to the specified interrupt holdoff value.
935 static int closest_timer(const struct sge
*s
, int us
)
937 int i
, timer_idx
= 0, min_delta
= INT_MAX
;
939 for (i
= 0; i
< ARRAY_SIZE(s
->timer_val
); i
++) {
940 int delta
= us
- s
->timer_val
[i
];
943 if (delta
< min_delta
) {
951 static int closest_thres(const struct sge
*s
, int thres
)
953 int i
, delta
, pktcnt_idx
= 0, min_delta
= INT_MAX
;
955 for (i
= 0; i
< ARRAY_SIZE(s
->counter_val
); i
++) {
956 delta
= thres
- s
->counter_val
[i
];
959 if (delta
< min_delta
) {
968 * Return a queue's interrupt hold-off time in us. 0 means no timer.
970 static unsigned int qtimer_val(const struct adapter
*adapter
,
971 const struct sge_rspq
*rspq
)
973 unsigned int timer_idx
= QINTR_TIMER_IDX_GET(rspq
->intr_params
);
975 return timer_idx
< SGE_NTIMERS
976 ? adapter
->sge
.timer_val
[timer_idx
]
981 * set_rxq_intr_params - set a queue's interrupt holdoff parameters
982 * @adapter: the adapter
983 * @rspq: the RX response queue
984 * @us: the hold-off time in us, or 0 to disable timer
985 * @cnt: the hold-off packet count, or 0 to disable counter
987 * Sets an RX response queue's interrupt hold-off time and packet count.
988 * At least one of the two needs to be enabled for the queue to generate
991 static int set_rxq_intr_params(struct adapter
*adapter
, struct sge_rspq
*rspq
,
992 unsigned int us
, unsigned int cnt
)
994 unsigned int timer_idx
;
997 * If both the interrupt holdoff timer and count are specified as
998 * zero, default to a holdoff count of 1 ...
1000 if ((us
| cnt
) == 0)
1004 * If an interrupt holdoff count has been specified, then find the
1005 * closest configured holdoff count and use that. If the response
1006 * queue has already been created, then update its queue context
1013 pktcnt_idx
= closest_thres(&adapter
->sge
, cnt
);
1014 if (rspq
->desc
&& rspq
->pktcnt_idx
!= pktcnt_idx
) {
1015 v
= FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ
) |
1017 FW_PARAMS_PARAM_DMAQ_IQ_INTCNTTHRESH
) |
1018 FW_PARAMS_PARAM_YZ(rspq
->cntxt_id
);
1019 err
= t4vf_set_params(adapter
, 1, &v
, &pktcnt_idx
);
1023 rspq
->pktcnt_idx
= pktcnt_idx
;
1027 * Compute the closest holdoff timer index from the supplied holdoff
1030 timer_idx
= (us
== 0
1031 ? SGE_TIMER_RSTRT_CNTR
1032 : closest_timer(&adapter
->sge
, us
));
1035 * Update the response queue's interrupt coalescing parameters and
1038 rspq
->intr_params
= (QINTR_TIMER_IDX(timer_idx
) |
1039 (cnt
> 0 ? QINTR_CNT_EN
: 0));
1044 * Return a version number to identify the type of adapter. The scheme is:
1045 * - bits 0..9: chip version
1046 * - bits 10..15: chip revision
1048 static inline unsigned int mk_adap_vers(const struct adapter
*adapter
)
1051 * Chip version 4, revision 0x3f (cxgb4vf).
1053 return CHELSIO_CHIP_VERSION(adapter
->chip
) | (0x3f << 10);
1057 * Execute the specified ioctl command.
1059 static int cxgb4vf_do_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
1065 * The VF Driver doesn't have access to any of the other
1066 * common Ethernet device ioctl()'s (like reading/writing
1067 * PHY registers, etc.
1078 * Change the device's MTU.
1080 static int cxgb4vf_change_mtu(struct net_device
*dev
, int new_mtu
)
1083 struct port_info
*pi
= netdev_priv(dev
);
1085 /* accommodate SACK */
1089 ret
= t4vf_set_rxmode(pi
->adapter
, pi
->viid
, new_mtu
,
1090 -1, -1, -1, -1, true);
1096 static netdev_features_t
cxgb4vf_fix_features(struct net_device
*dev
,
1097 netdev_features_t features
)
1100 * Since there is no support for separate rx/tx vlan accel
1101 * enable/disable make sure tx flag is always in same state as rx.
1103 if (features
& NETIF_F_HW_VLAN_CTAG_RX
)
1104 features
|= NETIF_F_HW_VLAN_CTAG_TX
;
1106 features
&= ~NETIF_F_HW_VLAN_CTAG_TX
;
1111 static int cxgb4vf_set_features(struct net_device
*dev
,
1112 netdev_features_t features
)
1114 struct port_info
*pi
= netdev_priv(dev
);
1115 netdev_features_t changed
= dev
->features
^ features
;
1117 if (changed
& NETIF_F_HW_VLAN_CTAG_RX
)
1118 t4vf_set_rxmode(pi
->adapter
, pi
->viid
, -1, -1, -1, -1,
1119 features
& NETIF_F_HW_VLAN_CTAG_TX
, 0);
1125 * Change the devices MAC address.
1127 static int cxgb4vf_set_mac_addr(struct net_device
*dev
, void *_addr
)
1130 struct sockaddr
*addr
= _addr
;
1131 struct port_info
*pi
= netdev_priv(dev
);
1133 if (!is_valid_ether_addr(addr
->sa_data
))
1134 return -EADDRNOTAVAIL
;
1136 ret
= t4vf_change_mac(pi
->adapter
, pi
->viid
, pi
->xact_addr_filt
,
1137 addr
->sa_data
, true);
1141 memcpy(dev
->dev_addr
, addr
->sa_data
, dev
->addr_len
);
1142 pi
->xact_addr_filt
= ret
;
1146 #ifdef CONFIG_NET_POLL_CONTROLLER
1148 * Poll all of our receive queues. This is called outside of normal interrupt
1151 static void cxgb4vf_poll_controller(struct net_device
*dev
)
1153 struct port_info
*pi
= netdev_priv(dev
);
1154 struct adapter
*adapter
= pi
->adapter
;
1156 if (adapter
->flags
& USING_MSIX
) {
1157 struct sge_eth_rxq
*rxq
;
1160 rxq
= &adapter
->sge
.ethrxq
[pi
->first_qset
];
1161 for (nqsets
= pi
->nqsets
; nqsets
; nqsets
--) {
1162 t4vf_sge_intr_msix(0, &rxq
->rspq
);
1166 t4vf_intr_handler(adapter
)(0, adapter
);
1171 * Ethtool operations.
1172 * ===================
1174 * Note that we don't support any ethtool operations which change the physical
1175 * state of the port to which we're linked.
1179 * Return current port link settings.
1181 static int cxgb4vf_get_settings(struct net_device
*dev
,
1182 struct ethtool_cmd
*cmd
)
1184 const struct port_info
*pi
= netdev_priv(dev
);
1186 cmd
->supported
= pi
->link_cfg
.supported
;
1187 cmd
->advertising
= pi
->link_cfg
.advertising
;
1188 ethtool_cmd_speed_set(cmd
,
1189 netif_carrier_ok(dev
) ? pi
->link_cfg
.speed
: -1);
1190 cmd
->duplex
= DUPLEX_FULL
;
1192 cmd
->port
= (cmd
->supported
& SUPPORTED_TP
) ? PORT_TP
: PORT_FIBRE
;
1193 cmd
->phy_address
= pi
->port_id
;
1194 cmd
->transceiver
= XCVR_EXTERNAL
;
1195 cmd
->autoneg
= pi
->link_cfg
.autoneg
;
1202 * Return our driver information.
1204 static void cxgb4vf_get_drvinfo(struct net_device
*dev
,
1205 struct ethtool_drvinfo
*drvinfo
)
1207 struct adapter
*adapter
= netdev2adap(dev
);
1209 strlcpy(drvinfo
->driver
, KBUILD_MODNAME
, sizeof(drvinfo
->driver
));
1210 strlcpy(drvinfo
->version
, DRV_VERSION
, sizeof(drvinfo
->version
));
1211 strlcpy(drvinfo
->bus_info
, pci_name(to_pci_dev(dev
->dev
.parent
)),
1212 sizeof(drvinfo
->bus_info
));
1213 snprintf(drvinfo
->fw_version
, sizeof(drvinfo
->fw_version
),
1214 "%u.%u.%u.%u, TP %u.%u.%u.%u",
1215 FW_HDR_FW_VER_MAJOR_GET(adapter
->params
.dev
.fwrev
),
1216 FW_HDR_FW_VER_MINOR_GET(adapter
->params
.dev
.fwrev
),
1217 FW_HDR_FW_VER_MICRO_GET(adapter
->params
.dev
.fwrev
),
1218 FW_HDR_FW_VER_BUILD_GET(adapter
->params
.dev
.fwrev
),
1219 FW_HDR_FW_VER_MAJOR_GET(adapter
->params
.dev
.tprev
),
1220 FW_HDR_FW_VER_MINOR_GET(adapter
->params
.dev
.tprev
),
1221 FW_HDR_FW_VER_MICRO_GET(adapter
->params
.dev
.tprev
),
1222 FW_HDR_FW_VER_BUILD_GET(adapter
->params
.dev
.tprev
));
1226 * Return current adapter message level.
1228 static u32
cxgb4vf_get_msglevel(struct net_device
*dev
)
1230 return netdev2adap(dev
)->msg_enable
;
1234 * Set current adapter message level.
1236 static void cxgb4vf_set_msglevel(struct net_device
*dev
, u32 msglevel
)
1238 netdev2adap(dev
)->msg_enable
= msglevel
;
1242 * Return the device's current Queue Set ring size parameters along with the
1243 * allowed maximum values. Since ethtool doesn't understand the concept of
1244 * multi-queue devices, we just return the current values associated with the
1247 static void cxgb4vf_get_ringparam(struct net_device
*dev
,
1248 struct ethtool_ringparam
*rp
)
1250 const struct port_info
*pi
= netdev_priv(dev
);
1251 const struct sge
*s
= &pi
->adapter
->sge
;
1253 rp
->rx_max_pending
= MAX_RX_BUFFERS
;
1254 rp
->rx_mini_max_pending
= MAX_RSPQ_ENTRIES
;
1255 rp
->rx_jumbo_max_pending
= 0;
1256 rp
->tx_max_pending
= MAX_TXQ_ENTRIES
;
1258 rp
->rx_pending
= s
->ethrxq
[pi
->first_qset
].fl
.size
- MIN_FL_RESID
;
1259 rp
->rx_mini_pending
= s
->ethrxq
[pi
->first_qset
].rspq
.size
;
1260 rp
->rx_jumbo_pending
= 0;
1261 rp
->tx_pending
= s
->ethtxq
[pi
->first_qset
].q
.size
;
1265 * Set the Queue Set ring size parameters for the device. Again, since
1266 * ethtool doesn't allow for the concept of multiple queues per device, we'll
1267 * apply these new values across all of the Queue Sets associated with the
1268 * device -- after vetting them of course!
1270 static int cxgb4vf_set_ringparam(struct net_device
*dev
,
1271 struct ethtool_ringparam
*rp
)
1273 const struct port_info
*pi
= netdev_priv(dev
);
1274 struct adapter
*adapter
= pi
->adapter
;
1275 struct sge
*s
= &adapter
->sge
;
1278 if (rp
->rx_pending
> MAX_RX_BUFFERS
||
1279 rp
->rx_jumbo_pending
||
1280 rp
->tx_pending
> MAX_TXQ_ENTRIES
||
1281 rp
->rx_mini_pending
> MAX_RSPQ_ENTRIES
||
1282 rp
->rx_mini_pending
< MIN_RSPQ_ENTRIES
||
1283 rp
->rx_pending
< MIN_FL_ENTRIES
||
1284 rp
->tx_pending
< MIN_TXQ_ENTRIES
)
1287 if (adapter
->flags
& FULL_INIT_DONE
)
1290 for (qs
= pi
->first_qset
; qs
< pi
->first_qset
+ pi
->nqsets
; qs
++) {
1291 s
->ethrxq
[qs
].fl
.size
= rp
->rx_pending
+ MIN_FL_RESID
;
1292 s
->ethrxq
[qs
].rspq
.size
= rp
->rx_mini_pending
;
1293 s
->ethtxq
[qs
].q
.size
= rp
->tx_pending
;
1299 * Return the interrupt holdoff timer and count for the first Queue Set on the
1300 * device. Our extension ioctl() (the cxgbtool interface) allows the
1301 * interrupt holdoff timer to be read on all of the device's Queue Sets.
1303 static int cxgb4vf_get_coalesce(struct net_device
*dev
,
1304 struct ethtool_coalesce
*coalesce
)
1306 const struct port_info
*pi
= netdev_priv(dev
);
1307 const struct adapter
*adapter
= pi
->adapter
;
1308 const struct sge_rspq
*rspq
= &adapter
->sge
.ethrxq
[pi
->first_qset
].rspq
;
1310 coalesce
->rx_coalesce_usecs
= qtimer_val(adapter
, rspq
);
1311 coalesce
->rx_max_coalesced_frames
=
1312 ((rspq
->intr_params
& QINTR_CNT_EN
)
1313 ? adapter
->sge
.counter_val
[rspq
->pktcnt_idx
]
1319 * Set the RX interrupt holdoff timer and count for the first Queue Set on the
1320 * interface. Our extension ioctl() (the cxgbtool interface) allows us to set
1321 * the interrupt holdoff timer on any of the device's Queue Sets.
1323 static int cxgb4vf_set_coalesce(struct net_device
*dev
,
1324 struct ethtool_coalesce
*coalesce
)
1326 const struct port_info
*pi
= netdev_priv(dev
);
1327 struct adapter
*adapter
= pi
->adapter
;
1329 return set_rxq_intr_params(adapter
,
1330 &adapter
->sge
.ethrxq
[pi
->first_qset
].rspq
,
1331 coalesce
->rx_coalesce_usecs
,
1332 coalesce
->rx_max_coalesced_frames
);
1336 * Report current port link pause parameter settings.
1338 static void cxgb4vf_get_pauseparam(struct net_device
*dev
,
1339 struct ethtool_pauseparam
*pauseparam
)
1341 struct port_info
*pi
= netdev_priv(dev
);
1343 pauseparam
->autoneg
= (pi
->link_cfg
.requested_fc
& PAUSE_AUTONEG
) != 0;
1344 pauseparam
->rx_pause
= (pi
->link_cfg
.fc
& PAUSE_RX
) != 0;
1345 pauseparam
->tx_pause
= (pi
->link_cfg
.fc
& PAUSE_TX
) != 0;
1349 * Identify the port by blinking the port's LED.
1351 static int cxgb4vf_phys_id(struct net_device
*dev
,
1352 enum ethtool_phys_id_state state
)
1355 struct port_info
*pi
= netdev_priv(dev
);
1357 if (state
== ETHTOOL_ID_ACTIVE
)
1359 else if (state
== ETHTOOL_ID_INACTIVE
)
1364 return t4vf_identify_port(pi
->adapter
, pi
->viid
, val
);
1368 * Port stats maintained per queue of the port.
1370 struct queue_port_stats
{
1381 * Strings for the ETH_SS_STATS statistics set ("ethtool -S"). Note that
1382 * these need to match the order of statistics returned by
1383 * t4vf_get_port_stats().
1385 static const char stats_strings
[][ETH_GSTRING_LEN
] = {
1387 * These must match the layout of the t4vf_port_stats structure.
1389 "TxBroadcastBytes ",
1390 "TxBroadcastFrames ",
1391 "TxMulticastBytes ",
1392 "TxMulticastFrames ",
1398 "RxBroadcastBytes ",
1399 "RxBroadcastFrames ",
1400 "RxMulticastBytes ",
1401 "RxMulticastFrames ",
1407 * These are accumulated per-queue statistics and must match the
1408 * order of the fields in the queue_port_stats structure.
1420 * Return the number of statistics in the specified statistics set.
1422 static int cxgb4vf_get_sset_count(struct net_device
*dev
, int sset
)
1426 return ARRAY_SIZE(stats_strings
);
1434 * Return the strings for the specified statistics set.
1436 static void cxgb4vf_get_strings(struct net_device
*dev
,
1442 memcpy(data
, stats_strings
, sizeof(stats_strings
));
1448 * Small utility routine to accumulate queue statistics across the queues of
1451 static void collect_sge_port_stats(const struct adapter
*adapter
,
1452 const struct port_info
*pi
,
1453 struct queue_port_stats
*stats
)
1455 const struct sge_eth_txq
*txq
= &adapter
->sge
.ethtxq
[pi
->first_qset
];
1456 const struct sge_eth_rxq
*rxq
= &adapter
->sge
.ethrxq
[pi
->first_qset
];
1459 memset(stats
, 0, sizeof(*stats
));
1460 for (qs
= 0; qs
< pi
->nqsets
; qs
++, rxq
++, txq
++) {
1461 stats
->tso
+= txq
->tso
;
1462 stats
->tx_csum
+= txq
->tx_cso
;
1463 stats
->rx_csum
+= rxq
->stats
.rx_cso
;
1464 stats
->vlan_ex
+= rxq
->stats
.vlan_ex
;
1465 stats
->vlan_ins
+= txq
->vlan_ins
;
1466 stats
->lro_pkts
+= rxq
->stats
.lro_pkts
;
1467 stats
->lro_merged
+= rxq
->stats
.lro_merged
;
1472 * Return the ETH_SS_STATS statistics set.
1474 static void cxgb4vf_get_ethtool_stats(struct net_device
*dev
,
1475 struct ethtool_stats
*stats
,
1478 struct port_info
*pi
= netdev2pinfo(dev
);
1479 struct adapter
*adapter
= pi
->adapter
;
1480 int err
= t4vf_get_port_stats(adapter
, pi
->pidx
,
1481 (struct t4vf_port_stats
*)data
);
1483 memset(data
, 0, sizeof(struct t4vf_port_stats
));
1485 data
+= sizeof(struct t4vf_port_stats
) / sizeof(u64
);
1486 collect_sge_port_stats(adapter
, pi
, (struct queue_port_stats
*)data
);
1490 * Return the size of our register map.
1492 static int cxgb4vf_get_regs_len(struct net_device
*dev
)
1494 return T4VF_REGMAP_SIZE
;
1498 * Dump a block of registers, start to end inclusive, into a buffer.
1500 static void reg_block_dump(struct adapter
*adapter
, void *regbuf
,
1501 unsigned int start
, unsigned int end
)
1503 u32
*bp
= regbuf
+ start
- T4VF_REGMAP_START
;
1505 for ( ; start
<= end
; start
+= sizeof(u32
)) {
1507 * Avoid reading the Mailbox Control register since that
1508 * can trigger a Mailbox Ownership Arbitration cycle and
1509 * interfere with communication with the firmware.
1511 if (start
== T4VF_CIM_BASE_ADDR
+ CIM_VF_EXT_MAILBOX_CTRL
)
1514 *bp
++ = t4_read_reg(adapter
, start
);
1519 * Copy our entire register map into the provided buffer.
1521 static void cxgb4vf_get_regs(struct net_device
*dev
,
1522 struct ethtool_regs
*regs
,
1525 struct adapter
*adapter
= netdev2adap(dev
);
1527 regs
->version
= mk_adap_vers(adapter
);
1530 * Fill in register buffer with our register map.
1532 memset(regbuf
, 0, T4VF_REGMAP_SIZE
);
1534 reg_block_dump(adapter
, regbuf
,
1535 T4VF_SGE_BASE_ADDR
+ T4VF_MOD_MAP_SGE_FIRST
,
1536 T4VF_SGE_BASE_ADDR
+ T4VF_MOD_MAP_SGE_LAST
);
1537 reg_block_dump(adapter
, regbuf
,
1538 T4VF_MPS_BASE_ADDR
+ T4VF_MOD_MAP_MPS_FIRST
,
1539 T4VF_MPS_BASE_ADDR
+ T4VF_MOD_MAP_MPS_LAST
);
1540 reg_block_dump(adapter
, regbuf
,
1541 T4VF_PL_BASE_ADDR
+ T4VF_MOD_MAP_PL_FIRST
,
1542 T4VF_PL_BASE_ADDR
+ T4VF_MOD_MAP_PL_LAST
);
1543 reg_block_dump(adapter
, regbuf
,
1544 T4VF_CIM_BASE_ADDR
+ T4VF_MOD_MAP_CIM_FIRST
,
1545 T4VF_CIM_BASE_ADDR
+ T4VF_MOD_MAP_CIM_LAST
);
1547 reg_block_dump(adapter
, regbuf
,
1548 T4VF_MBDATA_BASE_ADDR
+ T4VF_MBDATA_FIRST
,
1549 T4VF_MBDATA_BASE_ADDR
+ T4VF_MBDATA_LAST
);
1553 * Report current Wake On LAN settings.
1555 static void cxgb4vf_get_wol(struct net_device
*dev
,
1556 struct ethtool_wolinfo
*wol
)
1560 memset(&wol
->sopass
, 0, sizeof(wol
->sopass
));
1564 * TCP Segmentation Offload flags which we support.
1566 #define TSO_FLAGS (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
1568 static const struct ethtool_ops cxgb4vf_ethtool_ops
= {
1569 .get_settings
= cxgb4vf_get_settings
,
1570 .get_drvinfo
= cxgb4vf_get_drvinfo
,
1571 .get_msglevel
= cxgb4vf_get_msglevel
,
1572 .set_msglevel
= cxgb4vf_set_msglevel
,
1573 .get_ringparam
= cxgb4vf_get_ringparam
,
1574 .set_ringparam
= cxgb4vf_set_ringparam
,
1575 .get_coalesce
= cxgb4vf_get_coalesce
,
1576 .set_coalesce
= cxgb4vf_set_coalesce
,
1577 .get_pauseparam
= cxgb4vf_get_pauseparam
,
1578 .get_link
= ethtool_op_get_link
,
1579 .get_strings
= cxgb4vf_get_strings
,
1580 .set_phys_id
= cxgb4vf_phys_id
,
1581 .get_sset_count
= cxgb4vf_get_sset_count
,
1582 .get_ethtool_stats
= cxgb4vf_get_ethtool_stats
,
1583 .get_regs_len
= cxgb4vf_get_regs_len
,
1584 .get_regs
= cxgb4vf_get_regs
,
1585 .get_wol
= cxgb4vf_get_wol
,
1589 * /sys/kernel/debug/cxgb4vf support code and data.
1590 * ================================================
1594 * Show SGE Queue Set information. We display QPL Queues Sets per line.
1598 static int sge_qinfo_show(struct seq_file
*seq
, void *v
)
1600 struct adapter
*adapter
= seq
->private;
1601 int eth_entries
= DIV_ROUND_UP(adapter
->sge
.ethqsets
, QPL
);
1602 int qs
, r
= (uintptr_t)v
- 1;
1605 seq_putc(seq
, '\n');
1607 #define S3(fmt_spec, s, v) \
1609 seq_printf(seq, "%-12s", s); \
1610 for (qs = 0; qs < n; ++qs) \
1611 seq_printf(seq, " %16" fmt_spec, v); \
1612 seq_putc(seq, '\n'); \
1614 #define S(s, v) S3("s", s, v)
1615 #define T(s, v) S3("u", s, txq[qs].v)
1616 #define R(s, v) S3("u", s, rxq[qs].v)
1618 if (r
< eth_entries
) {
1619 const struct sge_eth_rxq
*rxq
= &adapter
->sge
.ethrxq
[r
* QPL
];
1620 const struct sge_eth_txq
*txq
= &adapter
->sge
.ethtxq
[r
* QPL
];
1621 int n
= min(QPL
, adapter
->sge
.ethqsets
- QPL
* r
);
1623 S("QType:", "Ethernet");
1625 (rxq
[qs
].rspq
.netdev
1626 ? rxq
[qs
].rspq
.netdev
->name
1629 (rxq
[qs
].rspq
.netdev
1630 ? ((struct port_info
*)
1631 netdev_priv(rxq
[qs
].rspq
.netdev
))->port_id
1633 T("TxQ ID:", q
.abs_id
);
1634 T("TxQ size:", q
.size
);
1635 T("TxQ inuse:", q
.in_use
);
1636 T("TxQ PIdx:", q
.pidx
);
1637 T("TxQ CIdx:", q
.cidx
);
1638 R("RspQ ID:", rspq
.abs_id
);
1639 R("RspQ size:", rspq
.size
);
1640 R("RspQE size:", rspq
.iqe_len
);
1641 S3("u", "Intr delay:", qtimer_val(adapter
, &rxq
[qs
].rspq
));
1642 S3("u", "Intr pktcnt:",
1643 adapter
->sge
.counter_val
[rxq
[qs
].rspq
.pktcnt_idx
]);
1644 R("RspQ CIdx:", rspq
.cidx
);
1645 R("RspQ Gen:", rspq
.gen
);
1646 R("FL ID:", fl
.abs_id
);
1647 R("FL size:", fl
.size
- MIN_FL_RESID
);
1648 R("FL avail:", fl
.avail
);
1649 R("FL PIdx:", fl
.pidx
);
1650 R("FL CIdx:", fl
.cidx
);
1656 const struct sge_rspq
*evtq
= &adapter
->sge
.fw_evtq
;
1658 seq_printf(seq
, "%-12s %16s\n", "QType:", "FW event queue");
1659 seq_printf(seq
, "%-12s %16u\n", "RspQ ID:", evtq
->abs_id
);
1660 seq_printf(seq
, "%-12s %16u\n", "Intr delay:",
1661 qtimer_val(adapter
, evtq
));
1662 seq_printf(seq
, "%-12s %16u\n", "Intr pktcnt:",
1663 adapter
->sge
.counter_val
[evtq
->pktcnt_idx
]);
1664 seq_printf(seq
, "%-12s %16u\n", "RspQ Cidx:", evtq
->cidx
);
1665 seq_printf(seq
, "%-12s %16u\n", "RspQ Gen:", evtq
->gen
);
1666 } else if (r
== 1) {
1667 const struct sge_rspq
*intrq
= &adapter
->sge
.intrq
;
1669 seq_printf(seq
, "%-12s %16s\n", "QType:", "Interrupt Queue");
1670 seq_printf(seq
, "%-12s %16u\n", "RspQ ID:", intrq
->abs_id
);
1671 seq_printf(seq
, "%-12s %16u\n", "Intr delay:",
1672 qtimer_val(adapter
, intrq
));
1673 seq_printf(seq
, "%-12s %16u\n", "Intr pktcnt:",
1674 adapter
->sge
.counter_val
[intrq
->pktcnt_idx
]);
1675 seq_printf(seq
, "%-12s %16u\n", "RspQ Cidx:", intrq
->cidx
);
1676 seq_printf(seq
, "%-12s %16u\n", "RspQ Gen:", intrq
->gen
);
1688 * Return the number of "entries" in our "file". We group the multi-Queue
1689 * sections with QPL Queue Sets per "entry". The sections of the output are:
1691 * Ethernet RX/TX Queue Sets
1692 * Firmware Event Queue
1693 * Forwarded Interrupt Queue (if in MSI mode)
1695 static int sge_queue_entries(const struct adapter
*adapter
)
1697 return DIV_ROUND_UP(adapter
->sge
.ethqsets
, QPL
) + 1 +
1698 ((adapter
->flags
& USING_MSI
) != 0);
1701 static void *sge_queue_start(struct seq_file
*seq
, loff_t
*pos
)
1703 int entries
= sge_queue_entries(seq
->private);
1705 return *pos
< entries
? (void *)((uintptr_t)*pos
+ 1) : NULL
;
1708 static void sge_queue_stop(struct seq_file
*seq
, void *v
)
1712 static void *sge_queue_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1714 int entries
= sge_queue_entries(seq
->private);
1717 return *pos
< entries
? (void *)((uintptr_t)*pos
+ 1) : NULL
;
1720 static const struct seq_operations sge_qinfo_seq_ops
= {
1721 .start
= sge_queue_start
,
1722 .next
= sge_queue_next
,
1723 .stop
= sge_queue_stop
,
1724 .show
= sge_qinfo_show
1727 static int sge_qinfo_open(struct inode
*inode
, struct file
*file
)
1729 int res
= seq_open(file
, &sge_qinfo_seq_ops
);
1732 struct seq_file
*seq
= file
->private_data
;
1733 seq
->private = inode
->i_private
;
1738 static const struct file_operations sge_qinfo_debugfs_fops
= {
1739 .owner
= THIS_MODULE
,
1740 .open
= sge_qinfo_open
,
1742 .llseek
= seq_lseek
,
1743 .release
= seq_release
,
1747 * Show SGE Queue Set statistics. We display QPL Queues Sets per line.
1751 static int sge_qstats_show(struct seq_file
*seq
, void *v
)
1753 struct adapter
*adapter
= seq
->private;
1754 int eth_entries
= DIV_ROUND_UP(adapter
->sge
.ethqsets
, QPL
);
1755 int qs
, r
= (uintptr_t)v
- 1;
1758 seq_putc(seq
, '\n');
1760 #define S3(fmt, s, v) \
1762 seq_printf(seq, "%-16s", s); \
1763 for (qs = 0; qs < n; ++qs) \
1764 seq_printf(seq, " %8" fmt, v); \
1765 seq_putc(seq, '\n'); \
1767 #define S(s, v) S3("s", s, v)
1769 #define T3(fmt, s, v) S3(fmt, s, txq[qs].v)
1770 #define T(s, v) T3("lu", s, v)
1772 #define R3(fmt, s, v) S3(fmt, s, rxq[qs].v)
1773 #define R(s, v) R3("lu", s, v)
1775 if (r
< eth_entries
) {
1776 const struct sge_eth_rxq
*rxq
= &adapter
->sge
.ethrxq
[r
* QPL
];
1777 const struct sge_eth_txq
*txq
= &adapter
->sge
.ethtxq
[r
* QPL
];
1778 int n
= min(QPL
, adapter
->sge
.ethqsets
- QPL
* r
);
1780 S("QType:", "Ethernet");
1782 (rxq
[qs
].rspq
.netdev
1783 ? rxq
[qs
].rspq
.netdev
->name
1785 R3("u", "RspQNullInts:", rspq
.unhandled_irqs
);
1786 R("RxPackets:", stats
.pkts
);
1787 R("RxCSO:", stats
.rx_cso
);
1788 R("VLANxtract:", stats
.vlan_ex
);
1789 R("LROmerged:", stats
.lro_merged
);
1790 R("LROpackets:", stats
.lro_pkts
);
1791 R("RxDrops:", stats
.rx_drops
);
1793 T("TxCSO:", tx_cso
);
1794 T("VLANins:", vlan_ins
);
1795 T("TxQFull:", q
.stops
);
1796 T("TxQRestarts:", q
.restarts
);
1797 T("TxMapErr:", mapping_err
);
1798 R("FLAllocErr:", fl
.alloc_failed
);
1799 R("FLLrgAlcErr:", fl
.large_alloc_failed
);
1800 R("FLStarving:", fl
.starving
);
1806 const struct sge_rspq
*evtq
= &adapter
->sge
.fw_evtq
;
1808 seq_printf(seq
, "%-8s %16s\n", "QType:", "FW event queue");
1809 seq_printf(seq
, "%-16s %8u\n", "RspQNullInts:",
1810 evtq
->unhandled_irqs
);
1811 seq_printf(seq
, "%-16s %8u\n", "RspQ CIdx:", evtq
->cidx
);
1812 seq_printf(seq
, "%-16s %8u\n", "RspQ Gen:", evtq
->gen
);
1813 } else if (r
== 1) {
1814 const struct sge_rspq
*intrq
= &adapter
->sge
.intrq
;
1816 seq_printf(seq
, "%-8s %16s\n", "QType:", "Interrupt Queue");
1817 seq_printf(seq
, "%-16s %8u\n", "RspQNullInts:",
1818 intrq
->unhandled_irqs
);
1819 seq_printf(seq
, "%-16s %8u\n", "RspQ CIdx:", intrq
->cidx
);
1820 seq_printf(seq
, "%-16s %8u\n", "RspQ Gen:", intrq
->gen
);
1834 * Return the number of "entries" in our "file". We group the multi-Queue
1835 * sections with QPL Queue Sets per "entry". The sections of the output are:
1837 * Ethernet RX/TX Queue Sets
1838 * Firmware Event Queue
1839 * Forwarded Interrupt Queue (if in MSI mode)
1841 static int sge_qstats_entries(const struct adapter
*adapter
)
1843 return DIV_ROUND_UP(adapter
->sge
.ethqsets
, QPL
) + 1 +
1844 ((adapter
->flags
& USING_MSI
) != 0);
1847 static void *sge_qstats_start(struct seq_file
*seq
, loff_t
*pos
)
1849 int entries
= sge_qstats_entries(seq
->private);
1851 return *pos
< entries
? (void *)((uintptr_t)*pos
+ 1) : NULL
;
1854 static void sge_qstats_stop(struct seq_file
*seq
, void *v
)
1858 static void *sge_qstats_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1860 int entries
= sge_qstats_entries(seq
->private);
1863 return *pos
< entries
? (void *)((uintptr_t)*pos
+ 1) : NULL
;
1866 static const struct seq_operations sge_qstats_seq_ops
= {
1867 .start
= sge_qstats_start
,
1868 .next
= sge_qstats_next
,
1869 .stop
= sge_qstats_stop
,
1870 .show
= sge_qstats_show
1873 static int sge_qstats_open(struct inode
*inode
, struct file
*file
)
1875 int res
= seq_open(file
, &sge_qstats_seq_ops
);
1878 struct seq_file
*seq
= file
->private_data
;
1879 seq
->private = inode
->i_private
;
1884 static const struct file_operations sge_qstats_proc_fops
= {
1885 .owner
= THIS_MODULE
,
1886 .open
= sge_qstats_open
,
1888 .llseek
= seq_lseek
,
1889 .release
= seq_release
,
1893 * Show PCI-E SR-IOV Virtual Function Resource Limits.
1895 static int resources_show(struct seq_file
*seq
, void *v
)
1897 struct adapter
*adapter
= seq
->private;
1898 struct vf_resources
*vfres
= &adapter
->params
.vfres
;
1900 #define S(desc, fmt, var) \
1901 seq_printf(seq, "%-60s " fmt "\n", \
1902 desc " (" #var "):", vfres->var)
1904 S("Virtual Interfaces", "%d", nvi
);
1905 S("Egress Queues", "%d", neq
);
1906 S("Ethernet Control", "%d", nethctrl
);
1907 S("Ingress Queues/w Free Lists/Interrupts", "%d", niqflint
);
1908 S("Ingress Queues", "%d", niq
);
1909 S("Traffic Class", "%d", tc
);
1910 S("Port Access Rights Mask", "%#x", pmask
);
1911 S("MAC Address Filters", "%d", nexactf
);
1912 S("Firmware Command Read Capabilities", "%#x", r_caps
);
1913 S("Firmware Command Write/Execute Capabilities", "%#x", wx_caps
);
1920 static int resources_open(struct inode
*inode
, struct file
*file
)
1922 return single_open(file
, resources_show
, inode
->i_private
);
1925 static const struct file_operations resources_proc_fops
= {
1926 .owner
= THIS_MODULE
,
1927 .open
= resources_open
,
1929 .llseek
= seq_lseek
,
1930 .release
= single_release
,
1934 * Show Virtual Interfaces.
1936 static int interfaces_show(struct seq_file
*seq
, void *v
)
1938 if (v
== SEQ_START_TOKEN
) {
1939 seq_puts(seq
, "Interface Port VIID\n");
1941 struct adapter
*adapter
= seq
->private;
1942 int pidx
= (uintptr_t)v
- 2;
1943 struct net_device
*dev
= adapter
->port
[pidx
];
1944 struct port_info
*pi
= netdev_priv(dev
);
1946 seq_printf(seq
, "%9s %4d %#5x\n",
1947 dev
->name
, pi
->port_id
, pi
->viid
);
1952 static inline void *interfaces_get_idx(struct adapter
*adapter
, loff_t pos
)
1954 return pos
<= adapter
->params
.nports
1955 ? (void *)(uintptr_t)(pos
+ 1)
1959 static void *interfaces_start(struct seq_file
*seq
, loff_t
*pos
)
1962 ? interfaces_get_idx(seq
->private, *pos
)
1966 static void *interfaces_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1969 return interfaces_get_idx(seq
->private, *pos
);
1972 static void interfaces_stop(struct seq_file
*seq
, void *v
)
1976 static const struct seq_operations interfaces_seq_ops
= {
1977 .start
= interfaces_start
,
1978 .next
= interfaces_next
,
1979 .stop
= interfaces_stop
,
1980 .show
= interfaces_show
1983 static int interfaces_open(struct inode
*inode
, struct file
*file
)
1985 int res
= seq_open(file
, &interfaces_seq_ops
);
1988 struct seq_file
*seq
= file
->private_data
;
1989 seq
->private = inode
->i_private
;
1994 static const struct file_operations interfaces_proc_fops
= {
1995 .owner
= THIS_MODULE
,
1996 .open
= interfaces_open
,
1998 .llseek
= seq_lseek
,
1999 .release
= seq_release
,
2003 * /sys/kernel/debugfs/cxgb4vf/ files list.
2005 struct cxgb4vf_debugfs_entry
{
2006 const char *name
; /* name of debugfs node */
2007 umode_t mode
; /* file system mode */
2008 const struct file_operations
*fops
;
2011 static struct cxgb4vf_debugfs_entry debugfs_files
[] = {
2012 { "sge_qinfo", S_IRUGO
, &sge_qinfo_debugfs_fops
},
2013 { "sge_qstats", S_IRUGO
, &sge_qstats_proc_fops
},
2014 { "resources", S_IRUGO
, &resources_proc_fops
},
2015 { "interfaces", S_IRUGO
, &interfaces_proc_fops
},
2019 * Module and device initialization and cleanup code.
2020 * ==================================================
2024 * Set up out /sys/kernel/debug/cxgb4vf sub-nodes. We assume that the
2025 * directory (debugfs_root) has already been set up.
2027 static int setup_debugfs(struct adapter
*adapter
)
2031 BUG_ON(IS_ERR_OR_NULL(adapter
->debugfs_root
));
2034 * Debugfs support is best effort.
2036 for (i
= 0; i
< ARRAY_SIZE(debugfs_files
); i
++)
2037 (void)debugfs_create_file(debugfs_files
[i
].name
,
2038 debugfs_files
[i
].mode
,
2039 adapter
->debugfs_root
,
2041 debugfs_files
[i
].fops
);
2047 * Tear down the /sys/kernel/debug/cxgb4vf sub-nodes created above. We leave
2048 * it to our caller to tear down the directory (debugfs_root).
2050 static void cleanup_debugfs(struct adapter
*adapter
)
2052 BUG_ON(IS_ERR_OR_NULL(adapter
->debugfs_root
));
2055 * Unlike our sister routine cleanup_proc(), we don't need to remove
2056 * individual entries because a call will be made to
2057 * debugfs_remove_recursive(). We just need to clean up any ancillary
2064 * Perform early "adapter" initialization. This is where we discover what
2065 * adapter parameters we're going to be using and initialize basic adapter
2068 static int adap_init0(struct adapter
*adapter
)
2070 struct vf_resources
*vfres
= &adapter
->params
.vfres
;
2071 struct sge_params
*sge_params
= &adapter
->params
.sge
;
2072 struct sge
*s
= &adapter
->sge
;
2073 unsigned int ethqsets
;
2077 * Wait for the device to become ready before proceeding ...
2079 err
= t4vf_wait_dev_ready(adapter
);
2081 dev_err(adapter
->pdev_dev
, "device didn't become ready:"
2087 * Some environments do not properly handle PCIE FLRs -- e.g. in Linux
2088 * 2.6.31 and later we can't call pci_reset_function() in order to
2089 * issue an FLR because of a self- deadlock on the device semaphore.
2090 * Meanwhile, the OS infrastructure doesn't issue FLRs in all the
2091 * cases where they're needed -- for instance, some versions of KVM
2092 * fail to reset "Assigned Devices" when the VM reboots. Therefore we
2093 * use the firmware based reset in order to reset any per function
2096 err
= t4vf_fw_reset(adapter
);
2098 dev_err(adapter
->pdev_dev
, "FW reset failed: err=%d\n", err
);
2102 switch (adapter
->pdev
->device
>> 12) {
2104 adapter
->chip
= CHELSIO_CHIP_CODE(CHELSIO_T4
, 0);
2107 adapter
->chip
= CHELSIO_CHIP_CODE(CHELSIO_T5
, 0);
2112 * Grab basic operational parameters. These will predominantly have
2113 * been set up by the Physical Function Driver or will be hard coded
2114 * into the adapter. We just have to live with them ... Note that
2115 * we _must_ get our VPD parameters before our SGE parameters because
2116 * we need to know the adapter's core clock from the VPD in order to
2117 * properly decode the SGE Timer Values.
2119 err
= t4vf_get_dev_params(adapter
);
2121 dev_err(adapter
->pdev_dev
, "unable to retrieve adapter"
2122 " device parameters: err=%d\n", err
);
2125 err
= t4vf_get_vpd_params(adapter
);
2127 dev_err(adapter
->pdev_dev
, "unable to retrieve adapter"
2128 " VPD parameters: err=%d\n", err
);
2131 err
= t4vf_get_sge_params(adapter
);
2133 dev_err(adapter
->pdev_dev
, "unable to retrieve adapter"
2134 " SGE parameters: err=%d\n", err
);
2137 err
= t4vf_get_rss_glb_config(adapter
);
2139 dev_err(adapter
->pdev_dev
, "unable to retrieve adapter"
2140 " RSS parameters: err=%d\n", err
);
2143 if (adapter
->params
.rss
.mode
!=
2144 FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL
) {
2145 dev_err(adapter
->pdev_dev
, "unable to operate with global RSS"
2146 " mode %d\n", adapter
->params
.rss
.mode
);
2149 err
= t4vf_sge_init(adapter
);
2151 dev_err(adapter
->pdev_dev
, "unable to use adapter parameters:"
2157 * Retrieve our RX interrupt holdoff timer values and counter
2158 * threshold values from the SGE parameters.
2160 s
->timer_val
[0] = core_ticks_to_us(adapter
,
2161 TIMERVALUE0_GET(sge_params
->sge_timer_value_0_and_1
));
2162 s
->timer_val
[1] = core_ticks_to_us(adapter
,
2163 TIMERVALUE1_GET(sge_params
->sge_timer_value_0_and_1
));
2164 s
->timer_val
[2] = core_ticks_to_us(adapter
,
2165 TIMERVALUE0_GET(sge_params
->sge_timer_value_2_and_3
));
2166 s
->timer_val
[3] = core_ticks_to_us(adapter
,
2167 TIMERVALUE1_GET(sge_params
->sge_timer_value_2_and_3
));
2168 s
->timer_val
[4] = core_ticks_to_us(adapter
,
2169 TIMERVALUE0_GET(sge_params
->sge_timer_value_4_and_5
));
2170 s
->timer_val
[5] = core_ticks_to_us(adapter
,
2171 TIMERVALUE1_GET(sge_params
->sge_timer_value_4_and_5
));
2174 THRESHOLD_0_GET(sge_params
->sge_ingress_rx_threshold
);
2176 THRESHOLD_1_GET(sge_params
->sge_ingress_rx_threshold
);
2178 THRESHOLD_2_GET(sge_params
->sge_ingress_rx_threshold
);
2180 THRESHOLD_3_GET(sge_params
->sge_ingress_rx_threshold
);
2183 * Grab our Virtual Interface resource allocation, extract the
2184 * features that we're interested in and do a bit of sanity testing on
2187 err
= t4vf_get_vfres(adapter
);
2189 dev_err(adapter
->pdev_dev
, "unable to get virtual interface"
2190 " resources: err=%d\n", err
);
2195 * The number of "ports" which we support is equal to the number of
2196 * Virtual Interfaces with which we've been provisioned.
2198 adapter
->params
.nports
= vfres
->nvi
;
2199 if (adapter
->params
.nports
> MAX_NPORTS
) {
2200 dev_warn(adapter
->pdev_dev
, "only using %d of %d allowed"
2201 " virtual interfaces\n", MAX_NPORTS
,
2202 adapter
->params
.nports
);
2203 adapter
->params
.nports
= MAX_NPORTS
;
2207 * We need to reserve a number of the ingress queues with Free List
2208 * and Interrupt capabilities for special interrupt purposes (like
2209 * asynchronous firmware messages, or forwarded interrupts if we're
2210 * using MSI). The rest of the FL/Intr-capable ingress queues will be
2211 * matched up one-for-one with Ethernet/Control egress queues in order
2212 * to form "Queue Sets" which will be aportioned between the "ports".
2213 * For each Queue Set, we'll need the ability to allocate two Egress
2214 * Contexts -- one for the Ingress Queue Free List and one for the TX
2217 ethqsets
= vfres
->niqflint
- INGQ_EXTRAS
;
2218 if (vfres
->nethctrl
!= ethqsets
) {
2219 dev_warn(adapter
->pdev_dev
, "unequal number of [available]"
2220 " ingress/egress queues (%d/%d); using minimum for"
2221 " number of Queue Sets\n", ethqsets
, vfres
->nethctrl
);
2222 ethqsets
= min(vfres
->nethctrl
, ethqsets
);
2224 if (vfres
->neq
< ethqsets
*2) {
2225 dev_warn(adapter
->pdev_dev
, "Not enough Egress Contexts (%d)"
2226 " to support Queue Sets (%d); reducing allowed Queue"
2227 " Sets\n", vfres
->neq
, ethqsets
);
2228 ethqsets
= vfres
->neq
/2;
2230 if (ethqsets
> MAX_ETH_QSETS
) {
2231 dev_warn(adapter
->pdev_dev
, "only using %d of %d allowed Queue"
2232 " Sets\n", MAX_ETH_QSETS
, adapter
->sge
.max_ethqsets
);
2233 ethqsets
= MAX_ETH_QSETS
;
2235 if (vfres
->niq
!= 0 || vfres
->neq
> ethqsets
*2) {
2236 dev_warn(adapter
->pdev_dev
, "unused resources niq/neq (%d/%d)"
2237 " ignored\n", vfres
->niq
, vfres
->neq
- ethqsets
*2);
2239 adapter
->sge
.max_ethqsets
= ethqsets
;
2242 * Check for various parameter sanity issues. Most checks simply
2243 * result in us using fewer resources than our provissioning but we
2244 * do need at least one "port" with which to work ...
2246 if (adapter
->sge
.max_ethqsets
< adapter
->params
.nports
) {
2247 dev_warn(adapter
->pdev_dev
, "only using %d of %d available"
2248 " virtual interfaces (too few Queue Sets)\n",
2249 adapter
->sge
.max_ethqsets
, adapter
->params
.nports
);
2250 adapter
->params
.nports
= adapter
->sge
.max_ethqsets
;
2252 if (adapter
->params
.nports
== 0) {
2253 dev_err(adapter
->pdev_dev
, "no virtual interfaces configured/"
2260 static inline void init_rspq(struct sge_rspq
*rspq
, u8 timer_idx
,
2261 u8 pkt_cnt_idx
, unsigned int size
,
2262 unsigned int iqe_size
)
2264 rspq
->intr_params
= (QINTR_TIMER_IDX(timer_idx
) |
2265 (pkt_cnt_idx
< SGE_NCOUNTERS
? QINTR_CNT_EN
: 0));
2266 rspq
->pktcnt_idx
= (pkt_cnt_idx
< SGE_NCOUNTERS
2269 rspq
->iqe_len
= iqe_size
;
2274 * Perform default configuration of DMA queues depending on the number and
2275 * type of ports we found and the number of available CPUs. Most settings can
2276 * be modified by the admin via ethtool and cxgbtool prior to the adapter
2277 * being brought up for the first time.
2279 static void cfg_queues(struct adapter
*adapter
)
2281 struct sge
*s
= &adapter
->sge
;
2282 int q10g
, n10g
, qidx
, pidx
, qs
;
2286 * We should not be called till we know how many Queue Sets we can
2287 * support. In particular, this means that we need to know what kind
2288 * of interrupts we'll be using ...
2290 BUG_ON((adapter
->flags
& (USING_MSIX
|USING_MSI
)) == 0);
2293 * Count the number of 10GbE Virtual Interfaces that we have.
2296 for_each_port(adapter
, pidx
)
2297 n10g
+= is_10g_port(&adap2pinfo(adapter
, pidx
)->link_cfg
);
2300 * We default to 1 queue per non-10G port and up to # of cores queues
2306 int n1g
= (adapter
->params
.nports
- n10g
);
2307 q10g
= (adapter
->sge
.max_ethqsets
- n1g
) / n10g
;
2308 if (q10g
> num_online_cpus())
2309 q10g
= num_online_cpus();
2313 * Allocate the "Queue Sets" to the various Virtual Interfaces.
2314 * The layout will be established in setup_sge_queues() when the
2315 * adapter is brough up for the first time.
2318 for_each_port(adapter
, pidx
) {
2319 struct port_info
*pi
= adap2pinfo(adapter
, pidx
);
2321 pi
->first_qset
= qidx
;
2322 pi
->nqsets
= is_10g_port(&pi
->link_cfg
) ? q10g
: 1;
2328 * The Ingress Queue Entry Size for our various Response Queues needs
2329 * to be big enough to accommodate the largest message we can receive
2330 * from the chip/firmware; which is 64 bytes ...
2335 * Set up default Queue Set parameters ... Start off with the
2336 * shortest interrupt holdoff timer.
2338 for (qs
= 0; qs
< s
->max_ethqsets
; qs
++) {
2339 struct sge_eth_rxq
*rxq
= &s
->ethrxq
[qs
];
2340 struct sge_eth_txq
*txq
= &s
->ethtxq
[qs
];
2342 init_rspq(&rxq
->rspq
, 0, 0, 1024, iqe_size
);
2348 * The firmware event queue is used for link state changes and
2349 * notifications of TX DMA completions.
2351 init_rspq(&s
->fw_evtq
, SGE_TIMER_RSTRT_CNTR
, 0, 512, iqe_size
);
2354 * The forwarded interrupt queue is used when we're in MSI interrupt
2355 * mode. In this mode all interrupts associated with RX queues will
2356 * be forwarded to a single queue which we'll associate with our MSI
2357 * interrupt vector. The messages dropped in the forwarded interrupt
2358 * queue will indicate which ingress queue needs servicing ... This
2359 * queue needs to be large enough to accommodate all of the ingress
2360 * queues which are forwarding their interrupt (+1 to prevent the PIDX
2361 * from equalling the CIDX if every ingress queue has an outstanding
2362 * interrupt). The queue doesn't need to be any larger because no
2363 * ingress queue will ever have more than one outstanding interrupt at
2366 init_rspq(&s
->intrq
, SGE_TIMER_RSTRT_CNTR
, 0, MSIX_ENTRIES
+ 1,
2371 * Reduce the number of Ethernet queues across all ports to at most n.
2372 * n provides at least one queue per port.
2374 static void reduce_ethqs(struct adapter
*adapter
, int n
)
2377 struct port_info
*pi
;
2380 * While we have too many active Ether Queue Sets, interate across the
2381 * "ports" and reduce their individual Queue Set allocations.
2383 BUG_ON(n
< adapter
->params
.nports
);
2384 while (n
< adapter
->sge
.ethqsets
)
2385 for_each_port(adapter
, i
) {
2386 pi
= adap2pinfo(adapter
, i
);
2387 if (pi
->nqsets
> 1) {
2389 adapter
->sge
.ethqsets
--;
2390 if (adapter
->sge
.ethqsets
<= n
)
2396 * Reassign the starting Queue Sets for each of the "ports" ...
2399 for_each_port(adapter
, i
) {
2400 pi
= adap2pinfo(adapter
, i
);
2407 * We need to grab enough MSI-X vectors to cover our interrupt needs. Ideally
2408 * we get a separate MSI-X vector for every "Queue Set" plus any extras we
2409 * need. Minimally we need one for every Virtual Interface plus those needed
2410 * for our "extras". Note that this process may lower the maximum number of
2411 * allowed Queue Sets ...
2413 static int enable_msix(struct adapter
*adapter
)
2415 int i
, err
, want
, need
;
2416 struct msix_entry entries
[MSIX_ENTRIES
];
2417 struct sge
*s
= &adapter
->sge
;
2419 for (i
= 0; i
< MSIX_ENTRIES
; ++i
)
2420 entries
[i
].entry
= i
;
2423 * We _want_ enough MSI-X interrupts to cover all of our "Queue Sets"
2424 * plus those needed for our "extras" (for example, the firmware
2425 * message queue). We _need_ at least one "Queue Set" per Virtual
2426 * Interface plus those needed for our "extras". So now we get to see
2427 * if the song is right ...
2429 want
= s
->max_ethqsets
+ MSIX_EXTRAS
;
2430 need
= adapter
->params
.nports
+ MSIX_EXTRAS
;
2431 while ((err
= pci_enable_msix(adapter
->pdev
, entries
, want
)) >= need
)
2435 int nqsets
= want
- MSIX_EXTRAS
;
2436 if (nqsets
< s
->max_ethqsets
) {
2437 dev_warn(adapter
->pdev_dev
, "only enough MSI-X vectors"
2438 " for %d Queue Sets\n", nqsets
);
2439 s
->max_ethqsets
= nqsets
;
2440 if (nqsets
< s
->ethqsets
)
2441 reduce_ethqs(adapter
, nqsets
);
2443 for (i
= 0; i
< want
; ++i
)
2444 adapter
->msix_info
[i
].vec
= entries
[i
].vector
;
2445 } else if (err
> 0) {
2446 pci_disable_msix(adapter
->pdev
);
2447 dev_info(adapter
->pdev_dev
, "only %d MSI-X vectors left,"
2448 " not using MSI-X\n", err
);
2453 static const struct net_device_ops cxgb4vf_netdev_ops
= {
2454 .ndo_open
= cxgb4vf_open
,
2455 .ndo_stop
= cxgb4vf_stop
,
2456 .ndo_start_xmit
= t4vf_eth_xmit
,
2457 .ndo_get_stats
= cxgb4vf_get_stats
,
2458 .ndo_set_rx_mode
= cxgb4vf_set_rxmode
,
2459 .ndo_set_mac_address
= cxgb4vf_set_mac_addr
,
2460 .ndo_validate_addr
= eth_validate_addr
,
2461 .ndo_do_ioctl
= cxgb4vf_do_ioctl
,
2462 .ndo_change_mtu
= cxgb4vf_change_mtu
,
2463 .ndo_fix_features
= cxgb4vf_fix_features
,
2464 .ndo_set_features
= cxgb4vf_set_features
,
2465 #ifdef CONFIG_NET_POLL_CONTROLLER
2466 .ndo_poll_controller
= cxgb4vf_poll_controller
,
2471 * "Probe" a device: initialize a device and construct all kernel and driver
2472 * state needed to manage the device. This routine is called "init_one" in
2475 static int cxgb4vf_pci_probe(struct pci_dev
*pdev
,
2476 const struct pci_device_id
*ent
)
2481 struct adapter
*adapter
;
2482 struct port_info
*pi
;
2483 struct net_device
*netdev
;
2486 * Print our driver banner the first time we're called to initialize a
2489 pr_info_once("%s - version %s\n", DRV_DESC
, DRV_VERSION
);
2492 * Initialize generic PCI device state.
2494 err
= pci_enable_device(pdev
);
2496 dev_err(&pdev
->dev
, "cannot enable PCI device\n");
2501 * Reserve PCI resources for the device. If we can't get them some
2502 * other driver may have already claimed the device ...
2504 err
= pci_request_regions(pdev
, KBUILD_MODNAME
);
2506 dev_err(&pdev
->dev
, "cannot obtain PCI resources\n");
2507 goto err_disable_device
;
2511 * Set up our DMA mask: try for 64-bit address masking first and
2512 * fall back to 32-bit if we can't get 64 bits ...
2514 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(64));
2516 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
2518 dev_err(&pdev
->dev
, "unable to obtain 64-bit DMA for"
2519 " coherent allocations\n");
2520 goto err_release_regions
;
2524 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
2526 dev_err(&pdev
->dev
, "no usable DMA configuration\n");
2527 goto err_release_regions
;
2533 * Enable bus mastering for the device ...
2535 pci_set_master(pdev
);
2538 * Allocate our adapter data structure and attach it to the device.
2540 adapter
= kzalloc(sizeof(*adapter
), GFP_KERNEL
);
2543 goto err_release_regions
;
2545 pci_set_drvdata(pdev
, adapter
);
2546 adapter
->pdev
= pdev
;
2547 adapter
->pdev_dev
= &pdev
->dev
;
2550 * Initialize SMP data synchronization resources.
2552 spin_lock_init(&adapter
->stats_lock
);
2555 * Map our I/O registers in BAR0.
2557 adapter
->regs
= pci_ioremap_bar(pdev
, 0);
2558 if (!adapter
->regs
) {
2559 dev_err(&pdev
->dev
, "cannot map device registers\n");
2561 goto err_free_adapter
;
2565 * Initialize adapter level features.
2567 adapter
->name
= pci_name(pdev
);
2568 adapter
->msg_enable
= dflt_msg_enable
;
2569 err
= adap_init0(adapter
);
2574 * Allocate our "adapter ports" and stitch everything together.
2576 pmask
= adapter
->params
.vfres
.pmask
;
2577 for_each_port(adapter
, pidx
) {
2581 * We simplistically allocate our virtual interfaces
2582 * sequentially across the port numbers to which we have
2583 * access rights. This should be configurable in some manner
2588 port_id
= ffs(pmask
) - 1;
2589 pmask
&= ~(1 << port_id
);
2590 viid
= t4vf_alloc_vi(adapter
, port_id
);
2592 dev_err(&pdev
->dev
, "cannot allocate VI for port %d:"
2593 " err=%d\n", port_id
, viid
);
2599 * Allocate our network device and stitch things together.
2601 netdev
= alloc_etherdev_mq(sizeof(struct port_info
),
2603 if (netdev
== NULL
) {
2604 t4vf_free_vi(adapter
, viid
);
2608 adapter
->port
[pidx
] = netdev
;
2609 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
2610 pi
= netdev_priv(netdev
);
2611 pi
->adapter
= adapter
;
2613 pi
->port_id
= port_id
;
2617 * Initialize the starting state of our "port" and register
2620 pi
->xact_addr_filt
= -1;
2621 netif_carrier_off(netdev
);
2622 netdev
->irq
= pdev
->irq
;
2624 netdev
->hw_features
= NETIF_F_SG
| TSO_FLAGS
|
2625 NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
|
2626 NETIF_F_HW_VLAN_CTAG_RX
| NETIF_F_RXCSUM
;
2627 netdev
->vlan_features
= NETIF_F_SG
| TSO_FLAGS
|
2628 NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
|
2630 netdev
->features
= netdev
->hw_features
|
2631 NETIF_F_HW_VLAN_CTAG_TX
;
2633 netdev
->features
|= NETIF_F_HIGHDMA
;
2635 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
2637 netdev
->netdev_ops
= &cxgb4vf_netdev_ops
;
2638 SET_ETHTOOL_OPS(netdev
, &cxgb4vf_ethtool_ops
);
2641 * Initialize the hardware/software state for the port.
2643 err
= t4vf_port_init(adapter
, pidx
);
2645 dev_err(&pdev
->dev
, "cannot initialize port %d\n",
2652 * The "card" is now ready to go. If any errors occur during device
2653 * registration we do not fail the whole "card" but rather proceed
2654 * only with the ports we manage to register successfully. However we
2655 * must register at least one net device.
2657 for_each_port(adapter
, pidx
) {
2658 netdev
= adapter
->port
[pidx
];
2662 err
= register_netdev(netdev
);
2664 dev_warn(&pdev
->dev
, "cannot register net device %s,"
2665 " skipping\n", netdev
->name
);
2669 set_bit(pidx
, &adapter
->registered_device_map
);
2671 if (adapter
->registered_device_map
== 0) {
2672 dev_err(&pdev
->dev
, "could not register any net devices\n");
2677 * Set up our debugfs entries.
2679 if (!IS_ERR_OR_NULL(cxgb4vf_debugfs_root
)) {
2680 adapter
->debugfs_root
=
2681 debugfs_create_dir(pci_name(pdev
),
2682 cxgb4vf_debugfs_root
);
2683 if (IS_ERR_OR_NULL(adapter
->debugfs_root
))
2684 dev_warn(&pdev
->dev
, "could not create debugfs"
2687 setup_debugfs(adapter
);
2691 * See what interrupts we'll be using. If we've been configured to
2692 * use MSI-X interrupts, try to enable them but fall back to using
2693 * MSI interrupts if we can't enable MSI-X interrupts. If we can't
2694 * get MSI interrupts we bail with the error.
2696 if (msi
== MSI_MSIX
&& enable_msix(adapter
) == 0)
2697 adapter
->flags
|= USING_MSIX
;
2699 err
= pci_enable_msi(pdev
);
2701 dev_err(&pdev
->dev
, "Unable to allocate %s interrupts;"
2703 msi
== MSI_MSIX
? "MSI-X or MSI" : "MSI", err
);
2704 goto err_free_debugfs
;
2706 adapter
->flags
|= USING_MSI
;
2710 * Now that we know how many "ports" we have and what their types are,
2711 * and how many Queue Sets we can support, we can configure our queue
2714 cfg_queues(adapter
);
2717 * Print a short notice on the existence and configuration of the new
2718 * VF network device ...
2720 for_each_port(adapter
, pidx
) {
2721 dev_info(adapter
->pdev_dev
, "%s: Chelsio VF NIC PCIe %s\n",
2722 adapter
->port
[pidx
]->name
,
2723 (adapter
->flags
& USING_MSIX
) ? "MSI-X" :
2724 (adapter
->flags
& USING_MSI
) ? "MSI" : "");
2733 * Error recovery and exit code. Unwind state that's been created
2734 * so far and return the error.
2738 if (!IS_ERR_OR_NULL(adapter
->debugfs_root
)) {
2739 cleanup_debugfs(adapter
);
2740 debugfs_remove_recursive(adapter
->debugfs_root
);
2744 for_each_port(adapter
, pidx
) {
2745 netdev
= adapter
->port
[pidx
];
2748 pi
= netdev_priv(netdev
);
2749 t4vf_free_vi(adapter
, pi
->viid
);
2750 if (test_bit(pidx
, &adapter
->registered_device_map
))
2751 unregister_netdev(netdev
);
2752 free_netdev(netdev
);
2756 iounmap(adapter
->regs
);
2760 pci_set_drvdata(pdev
, NULL
);
2762 err_release_regions
:
2763 pci_release_regions(pdev
);
2764 pci_set_drvdata(pdev
, NULL
);
2765 pci_clear_master(pdev
);
2768 pci_disable_device(pdev
);
2774 * "Remove" a device: tear down all kernel and driver state created in the
2775 * "probe" routine and quiesce the device (disable interrupts, etc.). (Note
2776 * that this is called "remove_one" in the PF Driver.)
2778 static void cxgb4vf_pci_remove(struct pci_dev
*pdev
)
2780 struct adapter
*adapter
= pci_get_drvdata(pdev
);
2783 * Tear down driver state associated with device.
2789 * Stop all of our activity. Unregister network port,
2790 * disable interrupts, etc.
2792 for_each_port(adapter
, pidx
)
2793 if (test_bit(pidx
, &adapter
->registered_device_map
))
2794 unregister_netdev(adapter
->port
[pidx
]);
2795 t4vf_sge_stop(adapter
);
2796 if (adapter
->flags
& USING_MSIX
) {
2797 pci_disable_msix(adapter
->pdev
);
2798 adapter
->flags
&= ~USING_MSIX
;
2799 } else if (adapter
->flags
& USING_MSI
) {
2800 pci_disable_msi(adapter
->pdev
);
2801 adapter
->flags
&= ~USING_MSI
;
2805 * Tear down our debugfs entries.
2807 if (!IS_ERR_OR_NULL(adapter
->debugfs_root
)) {
2808 cleanup_debugfs(adapter
);
2809 debugfs_remove_recursive(adapter
->debugfs_root
);
2813 * Free all of the various resources which we've acquired ...
2815 t4vf_free_sge_resources(adapter
);
2816 for_each_port(adapter
, pidx
) {
2817 struct net_device
*netdev
= adapter
->port
[pidx
];
2818 struct port_info
*pi
;
2823 pi
= netdev_priv(netdev
);
2824 t4vf_free_vi(adapter
, pi
->viid
);
2825 free_netdev(netdev
);
2827 iounmap(adapter
->regs
);
2829 pci_set_drvdata(pdev
, NULL
);
2833 * Disable the device and release its PCI resources.
2835 pci_disable_device(pdev
);
2836 pci_clear_master(pdev
);
2837 pci_release_regions(pdev
);
2841 * "Shutdown" quiesce the device, stopping Ingress Packet and Interrupt
2844 static void cxgb4vf_pci_shutdown(struct pci_dev
*pdev
)
2846 struct adapter
*adapter
;
2849 adapter
= pci_get_drvdata(pdev
);
2854 * Disable all Virtual Interfaces. This will shut down the
2855 * delivery of all ingress packets into the chip for these
2856 * Virtual Interfaces.
2858 for_each_port(adapter
, pidx
) {
2859 struct net_device
*netdev
;
2860 struct port_info
*pi
;
2862 if (!test_bit(pidx
, &adapter
->registered_device_map
))
2865 netdev
= adapter
->port
[pidx
];
2869 pi
= netdev_priv(netdev
);
2870 t4vf_enable_vi(adapter
, pi
->viid
, false, false);
2874 * Free up all Queues which will prevent further DMA and
2875 * Interrupts allowing various internal pathways to drain.
2877 t4vf_free_sge_resources(adapter
);
2881 * PCI Device registration data structures.
2883 #define CH_DEVICE(devid, idx) \
2884 { PCI_VENDOR_ID_CHELSIO, devid, PCI_ANY_ID, PCI_ANY_ID, 0, 0, idx }
2886 static struct pci_device_id cxgb4vf_pci_tbl
[] = {
2887 CH_DEVICE(0xb000, 0), /* PE10K FPGA */
2888 CH_DEVICE(0x4800, 0), /* T440-dbg */
2889 CH_DEVICE(0x4801, 0), /* T420-cr */
2890 CH_DEVICE(0x4802, 0), /* T422-cr */
2891 CH_DEVICE(0x4803, 0), /* T440-cr */
2892 CH_DEVICE(0x4804, 0), /* T420-bch */
2893 CH_DEVICE(0x4805, 0), /* T440-bch */
2894 CH_DEVICE(0x4806, 0), /* T460-ch */
2895 CH_DEVICE(0x4807, 0), /* T420-so */
2896 CH_DEVICE(0x4808, 0), /* T420-cx */
2897 CH_DEVICE(0x4809, 0), /* T420-bt */
2898 CH_DEVICE(0x480a, 0), /* T404-bt */
2899 CH_DEVICE(0x480d, 0), /* T480-cr */
2900 CH_DEVICE(0x480e, 0), /* T440-lp-cr */
2901 CH_DEVICE(0x5800, 0), /* T580-dbg */
2902 CH_DEVICE(0x5801, 0), /* T520-cr */
2903 CH_DEVICE(0x5802, 0), /* T522-cr */
2904 CH_DEVICE(0x5803, 0), /* T540-cr */
2905 CH_DEVICE(0x5804, 0), /* T520-bch */
2906 CH_DEVICE(0x5805, 0), /* T540-bch */
2907 CH_DEVICE(0x5806, 0), /* T540-ch */
2908 CH_DEVICE(0x5807, 0), /* T520-so */
2909 CH_DEVICE(0x5808, 0), /* T520-cx */
2910 CH_DEVICE(0x5809, 0), /* T520-bt */
2911 CH_DEVICE(0x580a, 0), /* T504-bt */
2912 CH_DEVICE(0x580b, 0), /* T520-sr */
2913 CH_DEVICE(0x580c, 0), /* T504-bt */
2914 CH_DEVICE(0x580d, 0), /* T580-cr */
2915 CH_DEVICE(0x580e, 0), /* T540-lp-cr */
2916 CH_DEVICE(0x580f, 0), /* Amsterdam */
2917 CH_DEVICE(0x5810, 0), /* T580-lp-cr */
2918 CH_DEVICE(0x5811, 0), /* T520-lp-cr */
2919 CH_DEVICE(0x5812, 0), /* T560-cr */
2920 CH_DEVICE(0x5813, 0), /* T580-cr */
2924 MODULE_DESCRIPTION(DRV_DESC
);
2925 MODULE_AUTHOR("Chelsio Communications");
2926 MODULE_LICENSE("Dual BSD/GPL");
2927 MODULE_VERSION(DRV_VERSION
);
2928 MODULE_DEVICE_TABLE(pci
, cxgb4vf_pci_tbl
);
2930 static struct pci_driver cxgb4vf_driver
= {
2931 .name
= KBUILD_MODNAME
,
2932 .id_table
= cxgb4vf_pci_tbl
,
2933 .probe
= cxgb4vf_pci_probe
,
2934 .remove
= cxgb4vf_pci_remove
,
2935 .shutdown
= cxgb4vf_pci_shutdown
,
2939 * Initialize global driver state.
2941 static int __init
cxgb4vf_module_init(void)
2946 * Vet our module parameters.
2948 if (msi
!= MSI_MSIX
&& msi
!= MSI_MSI
) {
2949 pr_warn("bad module parameter msi=%d; must be %d (MSI-X or MSI) or %d (MSI)\n",
2950 msi
, MSI_MSIX
, MSI_MSI
);
2954 /* Debugfs support is optional, just warn if this fails */
2955 cxgb4vf_debugfs_root
= debugfs_create_dir(KBUILD_MODNAME
, NULL
);
2956 if (IS_ERR_OR_NULL(cxgb4vf_debugfs_root
))
2957 pr_warn("could not create debugfs entry, continuing\n");
2959 ret
= pci_register_driver(&cxgb4vf_driver
);
2960 if (ret
< 0 && !IS_ERR_OR_NULL(cxgb4vf_debugfs_root
))
2961 debugfs_remove(cxgb4vf_debugfs_root
);
2966 * Tear down global driver state.
2968 static void __exit
cxgb4vf_module_exit(void)
2970 pci_unregister_driver(&cxgb4vf_driver
);
2971 debugfs_remove(cxgb4vf_debugfs_root
);
2974 module_init(cxgb4vf_module_init
);
2975 module_exit(cxgb4vf_module_exit
);