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
);
413 /* FW can send EGR_UPDATEs encapsulated in a CPL_FW4_MSG.
415 const struct cpl_sge_egr_update
*p
= (void *)(rsp
+ 3);
416 opcode
= G_CPL_OPCODE(ntohl(p
->opcode_qid
));
417 if (opcode
!= CPL_SGE_EGR_UPDATE
) {
418 dev_err(adapter
->pdev_dev
, "unexpected FW4/CPL %#x on FW event queue\n"
426 case CPL_SGE_EGR_UPDATE
: {
428 * We've received an Egress Queue Status Update message. We
429 * get these, if the SGE is configured to send these when the
430 * firmware passes certain points in processing our TX
431 * Ethernet Queue or if we make an explicit request for one.
432 * We use these updates to determine when we may need to
433 * restart a TX Ethernet Queue which was stopped for lack of
434 * free TX Queue Descriptors ...
436 const struct cpl_sge_egr_update
*p
= cpl
;
437 unsigned int qid
= EGR_QID(be32_to_cpu(p
->opcode_qid
));
438 struct sge
*s
= &adapter
->sge
;
440 struct sge_eth_txq
*txq
;
444 * Perform sanity checking on the Queue ID to make sure it
445 * really refers to one of our TX Ethernet Egress Queues which
446 * is active and matches the queue's ID. None of these error
447 * conditions should ever happen so we may want to either make
448 * them fatal and/or conditionalized under DEBUG.
450 eq_idx
= EQ_IDX(s
, qid
);
451 if (unlikely(eq_idx
>= MAX_EGRQ
)) {
452 dev_err(adapter
->pdev_dev
,
453 "Egress Update QID %d out of range\n", qid
);
456 tq
= s
->egr_map
[eq_idx
];
457 if (unlikely(tq
== NULL
)) {
458 dev_err(adapter
->pdev_dev
,
459 "Egress Update QID %d TXQ=NULL\n", qid
);
462 txq
= container_of(tq
, struct sge_eth_txq
, q
);
463 if (unlikely(tq
->abs_id
!= qid
)) {
464 dev_err(adapter
->pdev_dev
,
465 "Egress Update QID %d refers to TXQ %d\n",
471 * Restart a stopped TX Queue which has less than half of its
475 netif_tx_wake_queue(txq
->txq
);
480 dev_err(adapter
->pdev_dev
,
481 "unexpected CPL %#x on FW event queue\n", opcode
);
488 * Allocate SGE TX/RX response queues. Determine how many sets of SGE queues
489 * to use and initializes them. We support multiple "Queue Sets" per port if
490 * we have MSI-X, otherwise just one queue set per port.
492 static int setup_sge_queues(struct adapter
*adapter
)
494 struct sge
*s
= &adapter
->sge
;
498 * Clear "Queue Set" Free List Starving and TX Queue Mapping Error
501 bitmap_zero(s
->starving_fl
, MAX_EGRQ
);
504 * If we're using MSI interrupt mode we need to set up a "forwarded
505 * interrupt" queue which we'll set up with our MSI vector. The rest
506 * of the ingress queues will be set up to forward their interrupts to
507 * this queue ... This must be first since t4vf_sge_alloc_rxq() uses
508 * the intrq's queue ID as the interrupt forwarding queue for the
509 * subsequent calls ...
511 if (adapter
->flags
& USING_MSI
) {
512 err
= t4vf_sge_alloc_rxq(adapter
, &s
->intrq
, false,
513 adapter
->port
[0], 0, NULL
, NULL
);
515 goto err_free_queues
;
519 * Allocate our ingress queue for asynchronous firmware messages.
521 err
= t4vf_sge_alloc_rxq(adapter
, &s
->fw_evtq
, true, adapter
->port
[0],
522 MSIX_FW
, NULL
, fwevtq_handler
);
524 goto err_free_queues
;
527 * Allocate each "port"'s initial Queue Sets. These can be changed
528 * later on ... up to the point where any interface on the adapter is
529 * brought up at which point lots of things get nailed down
533 for_each_port(adapter
, pidx
) {
534 struct net_device
*dev
= adapter
->port
[pidx
];
535 struct port_info
*pi
= netdev_priv(dev
);
536 struct sge_eth_rxq
*rxq
= &s
->ethrxq
[pi
->first_qset
];
537 struct sge_eth_txq
*txq
= &s
->ethtxq
[pi
->first_qset
];
540 for (qs
= 0; qs
< pi
->nqsets
; qs
++, rxq
++, txq
++) {
541 err
= t4vf_sge_alloc_rxq(adapter
, &rxq
->rspq
, false,
543 &rxq
->fl
, t4vf_ethrx_handler
);
545 goto err_free_queues
;
547 err
= t4vf_sge_alloc_eth_txq(adapter
, txq
, dev
,
548 netdev_get_tx_queue(dev
, qs
),
549 s
->fw_evtq
.cntxt_id
);
551 goto err_free_queues
;
554 memset(&rxq
->stats
, 0, sizeof(rxq
->stats
));
559 * Create the reverse mappings for the queues.
561 s
->egr_base
= s
->ethtxq
[0].q
.abs_id
- s
->ethtxq
[0].q
.cntxt_id
;
562 s
->ingr_base
= s
->ethrxq
[0].rspq
.abs_id
- s
->ethrxq
[0].rspq
.cntxt_id
;
563 IQ_MAP(s
, s
->fw_evtq
.abs_id
) = &s
->fw_evtq
;
564 for_each_port(adapter
, pidx
) {
565 struct net_device
*dev
= adapter
->port
[pidx
];
566 struct port_info
*pi
= netdev_priv(dev
);
567 struct sge_eth_rxq
*rxq
= &s
->ethrxq
[pi
->first_qset
];
568 struct sge_eth_txq
*txq
= &s
->ethtxq
[pi
->first_qset
];
571 for (qs
= 0; qs
< pi
->nqsets
; qs
++, rxq
++, txq
++) {
572 IQ_MAP(s
, rxq
->rspq
.abs_id
) = &rxq
->rspq
;
573 EQ_MAP(s
, txq
->q
.abs_id
) = &txq
->q
;
576 * The FW_IQ_CMD doesn't return the Absolute Queue IDs
577 * for Free Lists but since all of the Egress Queues
578 * (including Free Lists) have Relative Queue IDs
579 * which are computed as Absolute - Base Queue ID, we
580 * can synthesize the Absolute Queue IDs for the Free
581 * Lists. This is useful for debugging purposes when
582 * we want to dump Queue Contexts via the PF Driver.
584 rxq
->fl
.abs_id
= rxq
->fl
.cntxt_id
+ s
->egr_base
;
585 EQ_MAP(s
, rxq
->fl
.abs_id
) = &rxq
->fl
;
591 t4vf_free_sge_resources(adapter
);
596 * Set up Receive Side Scaling (RSS) to distribute packets to multiple receive
597 * queues. We configure the RSS CPU lookup table to distribute to the number
598 * of HW receive queues, and the response queue lookup table to narrow that
599 * down to the response queues actually configured for each "port" (Virtual
600 * Interface). We always configure the RSS mapping for all ports since the
601 * mapping table has plenty of entries.
603 static int setup_rss(struct adapter
*adapter
)
607 for_each_port(adapter
, pidx
) {
608 struct port_info
*pi
= adap2pinfo(adapter
, pidx
);
609 struct sge_eth_rxq
*rxq
= &adapter
->sge
.ethrxq
[pi
->first_qset
];
610 u16 rss
[MAX_PORT_QSETS
];
613 for (qs
= 0; qs
< pi
->nqsets
; qs
++)
614 rss
[qs
] = rxq
[qs
].rspq
.abs_id
;
616 err
= t4vf_config_rss_range(adapter
, pi
->viid
,
617 0, pi
->rss_size
, rss
, pi
->nqsets
);
622 * Perform Global RSS Mode-specific initialization.
624 switch (adapter
->params
.rss
.mode
) {
625 case FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL
:
627 * If Tunnel All Lookup isn't specified in the global
628 * RSS Configuration, then we need to specify a
629 * default Ingress Queue for any ingress packets which
630 * aren't hashed. We'll use our first ingress queue
633 if (!adapter
->params
.rss
.u
.basicvirtual
.tnlalllookup
) {
634 union rss_vi_config config
;
635 err
= t4vf_read_rss_vi_config(adapter
,
640 config
.basicvirtual
.defaultq
=
642 err
= t4vf_write_rss_vi_config(adapter
,
656 * Bring the adapter up. Called whenever we go from no "ports" open to having
657 * one open. This function performs the actions necessary to make an adapter
658 * operational, such as completing the initialization of HW modules, and
659 * enabling interrupts. Must be called with the rtnl lock held. (Note that
660 * this is called "cxgb_up" in the PF Driver.)
662 static int adapter_up(struct adapter
*adapter
)
667 * If this is the first time we've been called, perform basic
668 * adapter setup. Once we've done this, many of our adapter
669 * parameters can no longer be changed ...
671 if ((adapter
->flags
& FULL_INIT_DONE
) == 0) {
672 err
= setup_sge_queues(adapter
);
675 err
= setup_rss(adapter
);
677 t4vf_free_sge_resources(adapter
);
681 if (adapter
->flags
& USING_MSIX
)
682 name_msix_vecs(adapter
);
683 adapter
->flags
|= FULL_INIT_DONE
;
687 * Acquire our interrupt resources. We only support MSI-X and MSI.
689 BUG_ON((adapter
->flags
& (USING_MSIX
|USING_MSI
)) == 0);
690 if (adapter
->flags
& USING_MSIX
)
691 err
= request_msix_queue_irqs(adapter
);
693 err
= request_irq(adapter
->pdev
->irq
,
694 t4vf_intr_handler(adapter
), 0,
695 adapter
->name
, adapter
);
697 dev_err(adapter
->pdev_dev
, "request_irq failed, err %d\n",
703 * Enable NAPI ingress processing and return success.
706 t4vf_sge_start(adapter
);
711 * Bring the adapter down. Called whenever the last "port" (Virtual
712 * Interface) closed. (Note that this routine is called "cxgb_down" in the PF
715 static void adapter_down(struct adapter
*adapter
)
718 * Free interrupt resources.
720 if (adapter
->flags
& USING_MSIX
)
721 free_msix_queue_irqs(adapter
);
723 free_irq(adapter
->pdev
->irq
, adapter
);
726 * Wait for NAPI handlers to finish.
732 * Start up a net device.
734 static int cxgb4vf_open(struct net_device
*dev
)
737 struct port_info
*pi
= netdev_priv(dev
);
738 struct adapter
*adapter
= pi
->adapter
;
741 * If this is the first interface that we're opening on the "adapter",
742 * bring the "adapter" up now.
744 if (adapter
->open_device_map
== 0) {
745 err
= adapter_up(adapter
);
751 * Note that this interface is up and start everything up ...
753 netif_set_real_num_tx_queues(dev
, pi
->nqsets
);
754 err
= netif_set_real_num_rx_queues(dev
, pi
->nqsets
);
757 err
= link_start(dev
);
761 netif_tx_start_all_queues(dev
);
762 set_bit(pi
->port_id
, &adapter
->open_device_map
);
766 if (adapter
->open_device_map
== 0)
767 adapter_down(adapter
);
772 * Shut down a net device. This routine is called "cxgb_close" in the PF
775 static int cxgb4vf_stop(struct net_device
*dev
)
777 struct port_info
*pi
= netdev_priv(dev
);
778 struct adapter
*adapter
= pi
->adapter
;
780 netif_tx_stop_all_queues(dev
);
781 netif_carrier_off(dev
);
782 t4vf_enable_vi(adapter
, pi
->viid
, false, false);
783 pi
->link_cfg
.link_ok
= 0;
785 clear_bit(pi
->port_id
, &adapter
->open_device_map
);
786 if (adapter
->open_device_map
== 0)
787 adapter_down(adapter
);
792 * Translate our basic statistics into the standard "ifconfig" statistics.
794 static struct net_device_stats
*cxgb4vf_get_stats(struct net_device
*dev
)
796 struct t4vf_port_stats stats
;
797 struct port_info
*pi
= netdev2pinfo(dev
);
798 struct adapter
*adapter
= pi
->adapter
;
799 struct net_device_stats
*ns
= &dev
->stats
;
802 spin_lock(&adapter
->stats_lock
);
803 err
= t4vf_get_port_stats(adapter
, pi
->pidx
, &stats
);
804 spin_unlock(&adapter
->stats_lock
);
806 memset(ns
, 0, sizeof(*ns
));
810 ns
->tx_bytes
= (stats
.tx_bcast_bytes
+ stats
.tx_mcast_bytes
+
811 stats
.tx_ucast_bytes
+ stats
.tx_offload_bytes
);
812 ns
->tx_packets
= (stats
.tx_bcast_frames
+ stats
.tx_mcast_frames
+
813 stats
.tx_ucast_frames
+ stats
.tx_offload_frames
);
814 ns
->rx_bytes
= (stats
.rx_bcast_bytes
+ stats
.rx_mcast_bytes
+
815 stats
.rx_ucast_bytes
);
816 ns
->rx_packets
= (stats
.rx_bcast_frames
+ stats
.rx_mcast_frames
+
817 stats
.rx_ucast_frames
);
818 ns
->multicast
= stats
.rx_mcast_frames
;
819 ns
->tx_errors
= stats
.tx_drop_frames
;
820 ns
->rx_errors
= stats
.rx_err_frames
;
826 * Collect up to maxaddrs worth of a netdevice's unicast addresses, starting
827 * at a specified offset within the list, into an array of addrss pointers and
828 * return the number collected.
830 static inline unsigned int collect_netdev_uc_list_addrs(const struct net_device
*dev
,
833 unsigned int maxaddrs
)
835 unsigned int index
= 0;
836 unsigned int naddr
= 0;
837 const struct netdev_hw_addr
*ha
;
839 for_each_dev_addr(dev
, ha
)
840 if (index
++ >= offset
) {
841 addr
[naddr
++] = ha
->addr
;
842 if (naddr
>= maxaddrs
)
849 * Collect up to maxaddrs worth of a netdevice's multicast addresses, starting
850 * at a specified offset within the list, into an array of addrss pointers and
851 * return the number collected.
853 static inline unsigned int collect_netdev_mc_list_addrs(const struct net_device
*dev
,
856 unsigned int maxaddrs
)
858 unsigned int index
= 0;
859 unsigned int naddr
= 0;
860 const struct netdev_hw_addr
*ha
;
862 netdev_for_each_mc_addr(ha
, dev
)
863 if (index
++ >= offset
) {
864 addr
[naddr
++] = ha
->addr
;
865 if (naddr
>= maxaddrs
)
872 * Configure the exact and hash address filters to handle a port's multicast
873 * and secondary unicast MAC addresses.
875 static int set_addr_filters(const struct net_device
*dev
, bool sleep
)
880 unsigned int offset
, naddr
;
883 const struct port_info
*pi
= netdev_priv(dev
);
885 /* first do the secondary unicast addresses */
886 for (offset
= 0; ; offset
+= naddr
) {
887 naddr
= collect_netdev_uc_list_addrs(dev
, addr
, offset
,
892 ret
= t4vf_alloc_mac_filt(pi
->adapter
, pi
->viid
, free
,
893 naddr
, addr
, NULL
, &uhash
, sleep
);
900 /* next set up the multicast addresses */
901 for (offset
= 0; ; offset
+= naddr
) {
902 naddr
= collect_netdev_mc_list_addrs(dev
, addr
, offset
,
907 ret
= t4vf_alloc_mac_filt(pi
->adapter
, pi
->viid
, free
,
908 naddr
, addr
, NULL
, &mhash
, sleep
);
914 return t4vf_set_addr_hash(pi
->adapter
, pi
->viid
, uhash
!= 0,
915 uhash
| mhash
, sleep
);
919 * Set RX properties of a port, such as promiscruity, address filters, and MTU.
920 * If @mtu is -1 it is left unchanged.
922 static int set_rxmode(struct net_device
*dev
, int mtu
, bool sleep_ok
)
925 struct port_info
*pi
= netdev_priv(dev
);
927 ret
= set_addr_filters(dev
, sleep_ok
);
929 ret
= t4vf_set_rxmode(pi
->adapter
, pi
->viid
, -1,
930 (dev
->flags
& IFF_PROMISC
) != 0,
931 (dev
->flags
& IFF_ALLMULTI
) != 0,
937 * Set the current receive modes on the device.
939 static void cxgb4vf_set_rxmode(struct net_device
*dev
)
941 /* unfortunately we can't return errors to the stack */
942 set_rxmode(dev
, -1, false);
946 * Find the entry in the interrupt holdoff timer value array which comes
947 * closest to the specified interrupt holdoff value.
949 static int closest_timer(const struct sge
*s
, int us
)
951 int i
, timer_idx
= 0, min_delta
= INT_MAX
;
953 for (i
= 0; i
< ARRAY_SIZE(s
->timer_val
); i
++) {
954 int delta
= us
- s
->timer_val
[i
];
957 if (delta
< min_delta
) {
965 static int closest_thres(const struct sge
*s
, int thres
)
967 int i
, delta
, pktcnt_idx
= 0, min_delta
= INT_MAX
;
969 for (i
= 0; i
< ARRAY_SIZE(s
->counter_val
); i
++) {
970 delta
= thres
- s
->counter_val
[i
];
973 if (delta
< min_delta
) {
982 * Return a queue's interrupt hold-off time in us. 0 means no timer.
984 static unsigned int qtimer_val(const struct adapter
*adapter
,
985 const struct sge_rspq
*rspq
)
987 unsigned int timer_idx
= QINTR_TIMER_IDX_GET(rspq
->intr_params
);
989 return timer_idx
< SGE_NTIMERS
990 ? adapter
->sge
.timer_val
[timer_idx
]
995 * set_rxq_intr_params - set a queue's interrupt holdoff parameters
996 * @adapter: the adapter
997 * @rspq: the RX response queue
998 * @us: the hold-off time in us, or 0 to disable timer
999 * @cnt: the hold-off packet count, or 0 to disable counter
1001 * Sets an RX response queue's interrupt hold-off time and packet count.
1002 * At least one of the two needs to be enabled for the queue to generate
1005 static int set_rxq_intr_params(struct adapter
*adapter
, struct sge_rspq
*rspq
,
1006 unsigned int us
, unsigned int cnt
)
1008 unsigned int timer_idx
;
1011 * If both the interrupt holdoff timer and count are specified as
1012 * zero, default to a holdoff count of 1 ...
1014 if ((us
| cnt
) == 0)
1018 * If an interrupt holdoff count has been specified, then find the
1019 * closest configured holdoff count and use that. If the response
1020 * queue has already been created, then update its queue context
1027 pktcnt_idx
= closest_thres(&adapter
->sge
, cnt
);
1028 if (rspq
->desc
&& rspq
->pktcnt_idx
!= pktcnt_idx
) {
1029 v
= FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ
) |
1031 FW_PARAMS_PARAM_DMAQ_IQ_INTCNTTHRESH
) |
1032 FW_PARAMS_PARAM_YZ(rspq
->cntxt_id
);
1033 err
= t4vf_set_params(adapter
, 1, &v
, &pktcnt_idx
);
1037 rspq
->pktcnt_idx
= pktcnt_idx
;
1041 * Compute the closest holdoff timer index from the supplied holdoff
1044 timer_idx
= (us
== 0
1045 ? SGE_TIMER_RSTRT_CNTR
1046 : closest_timer(&adapter
->sge
, us
));
1049 * Update the response queue's interrupt coalescing parameters and
1052 rspq
->intr_params
= (QINTR_TIMER_IDX(timer_idx
) |
1053 (cnt
> 0 ? QINTR_CNT_EN
: 0));
1058 * Return a version number to identify the type of adapter. The scheme is:
1059 * - bits 0..9: chip version
1060 * - bits 10..15: chip revision
1062 static inline unsigned int mk_adap_vers(const struct adapter
*adapter
)
1065 * Chip version 4, revision 0x3f (cxgb4vf).
1067 return CHELSIO_CHIP_VERSION(adapter
->params
.chip
) | (0x3f << 10);
1071 * Execute the specified ioctl command.
1073 static int cxgb4vf_do_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
1079 * The VF Driver doesn't have access to any of the other
1080 * common Ethernet device ioctl()'s (like reading/writing
1081 * PHY registers, etc.
1092 * Change the device's MTU.
1094 static int cxgb4vf_change_mtu(struct net_device
*dev
, int new_mtu
)
1097 struct port_info
*pi
= netdev_priv(dev
);
1099 /* accommodate SACK */
1103 ret
= t4vf_set_rxmode(pi
->adapter
, pi
->viid
, new_mtu
,
1104 -1, -1, -1, -1, true);
1110 static netdev_features_t
cxgb4vf_fix_features(struct net_device
*dev
,
1111 netdev_features_t features
)
1114 * Since there is no support for separate rx/tx vlan accel
1115 * enable/disable make sure tx flag is always in same state as rx.
1117 if (features
& NETIF_F_HW_VLAN_CTAG_RX
)
1118 features
|= NETIF_F_HW_VLAN_CTAG_TX
;
1120 features
&= ~NETIF_F_HW_VLAN_CTAG_TX
;
1125 static int cxgb4vf_set_features(struct net_device
*dev
,
1126 netdev_features_t features
)
1128 struct port_info
*pi
= netdev_priv(dev
);
1129 netdev_features_t changed
= dev
->features
^ features
;
1131 if (changed
& NETIF_F_HW_VLAN_CTAG_RX
)
1132 t4vf_set_rxmode(pi
->adapter
, pi
->viid
, -1, -1, -1, -1,
1133 features
& NETIF_F_HW_VLAN_CTAG_TX
, 0);
1139 * Change the devices MAC address.
1141 static int cxgb4vf_set_mac_addr(struct net_device
*dev
, void *_addr
)
1144 struct sockaddr
*addr
= _addr
;
1145 struct port_info
*pi
= netdev_priv(dev
);
1147 if (!is_valid_ether_addr(addr
->sa_data
))
1148 return -EADDRNOTAVAIL
;
1150 ret
= t4vf_change_mac(pi
->adapter
, pi
->viid
, pi
->xact_addr_filt
,
1151 addr
->sa_data
, true);
1155 memcpy(dev
->dev_addr
, addr
->sa_data
, dev
->addr_len
);
1156 pi
->xact_addr_filt
= ret
;
1160 #ifdef CONFIG_NET_POLL_CONTROLLER
1162 * Poll all of our receive queues. This is called outside of normal interrupt
1165 static void cxgb4vf_poll_controller(struct net_device
*dev
)
1167 struct port_info
*pi
= netdev_priv(dev
);
1168 struct adapter
*adapter
= pi
->adapter
;
1170 if (adapter
->flags
& USING_MSIX
) {
1171 struct sge_eth_rxq
*rxq
;
1174 rxq
= &adapter
->sge
.ethrxq
[pi
->first_qset
];
1175 for (nqsets
= pi
->nqsets
; nqsets
; nqsets
--) {
1176 t4vf_sge_intr_msix(0, &rxq
->rspq
);
1180 t4vf_intr_handler(adapter
)(0, adapter
);
1185 * Ethtool operations.
1186 * ===================
1188 * Note that we don't support any ethtool operations which change the physical
1189 * state of the port to which we're linked.
1193 * Return current port link settings.
1195 static int cxgb4vf_get_settings(struct net_device
*dev
,
1196 struct ethtool_cmd
*cmd
)
1198 const struct port_info
*pi
= netdev_priv(dev
);
1200 cmd
->supported
= pi
->link_cfg
.supported
;
1201 cmd
->advertising
= pi
->link_cfg
.advertising
;
1202 ethtool_cmd_speed_set(cmd
,
1203 netif_carrier_ok(dev
) ? pi
->link_cfg
.speed
: -1);
1204 cmd
->duplex
= DUPLEX_FULL
;
1206 cmd
->port
= (cmd
->supported
& SUPPORTED_TP
) ? PORT_TP
: PORT_FIBRE
;
1207 cmd
->phy_address
= pi
->port_id
;
1208 cmd
->transceiver
= XCVR_EXTERNAL
;
1209 cmd
->autoneg
= pi
->link_cfg
.autoneg
;
1216 * Return our driver information.
1218 static void cxgb4vf_get_drvinfo(struct net_device
*dev
,
1219 struct ethtool_drvinfo
*drvinfo
)
1221 struct adapter
*adapter
= netdev2adap(dev
);
1223 strlcpy(drvinfo
->driver
, KBUILD_MODNAME
, sizeof(drvinfo
->driver
));
1224 strlcpy(drvinfo
->version
, DRV_VERSION
, sizeof(drvinfo
->version
));
1225 strlcpy(drvinfo
->bus_info
, pci_name(to_pci_dev(dev
->dev
.parent
)),
1226 sizeof(drvinfo
->bus_info
));
1227 snprintf(drvinfo
->fw_version
, sizeof(drvinfo
->fw_version
),
1228 "%u.%u.%u.%u, TP %u.%u.%u.%u",
1229 FW_HDR_FW_VER_MAJOR_GET(adapter
->params
.dev
.fwrev
),
1230 FW_HDR_FW_VER_MINOR_GET(adapter
->params
.dev
.fwrev
),
1231 FW_HDR_FW_VER_MICRO_GET(adapter
->params
.dev
.fwrev
),
1232 FW_HDR_FW_VER_BUILD_GET(adapter
->params
.dev
.fwrev
),
1233 FW_HDR_FW_VER_MAJOR_GET(adapter
->params
.dev
.tprev
),
1234 FW_HDR_FW_VER_MINOR_GET(adapter
->params
.dev
.tprev
),
1235 FW_HDR_FW_VER_MICRO_GET(adapter
->params
.dev
.tprev
),
1236 FW_HDR_FW_VER_BUILD_GET(adapter
->params
.dev
.tprev
));
1240 * Return current adapter message level.
1242 static u32
cxgb4vf_get_msglevel(struct net_device
*dev
)
1244 return netdev2adap(dev
)->msg_enable
;
1248 * Set current adapter message level.
1250 static void cxgb4vf_set_msglevel(struct net_device
*dev
, u32 msglevel
)
1252 netdev2adap(dev
)->msg_enable
= msglevel
;
1256 * Return the device's current Queue Set ring size parameters along with the
1257 * allowed maximum values. Since ethtool doesn't understand the concept of
1258 * multi-queue devices, we just return the current values associated with the
1261 static void cxgb4vf_get_ringparam(struct net_device
*dev
,
1262 struct ethtool_ringparam
*rp
)
1264 const struct port_info
*pi
= netdev_priv(dev
);
1265 const struct sge
*s
= &pi
->adapter
->sge
;
1267 rp
->rx_max_pending
= MAX_RX_BUFFERS
;
1268 rp
->rx_mini_max_pending
= MAX_RSPQ_ENTRIES
;
1269 rp
->rx_jumbo_max_pending
= 0;
1270 rp
->tx_max_pending
= MAX_TXQ_ENTRIES
;
1272 rp
->rx_pending
= s
->ethrxq
[pi
->first_qset
].fl
.size
- MIN_FL_RESID
;
1273 rp
->rx_mini_pending
= s
->ethrxq
[pi
->first_qset
].rspq
.size
;
1274 rp
->rx_jumbo_pending
= 0;
1275 rp
->tx_pending
= s
->ethtxq
[pi
->first_qset
].q
.size
;
1279 * Set the Queue Set ring size parameters for the device. Again, since
1280 * ethtool doesn't allow for the concept of multiple queues per device, we'll
1281 * apply these new values across all of the Queue Sets associated with the
1282 * device -- after vetting them of course!
1284 static int cxgb4vf_set_ringparam(struct net_device
*dev
,
1285 struct ethtool_ringparam
*rp
)
1287 const struct port_info
*pi
= netdev_priv(dev
);
1288 struct adapter
*adapter
= pi
->adapter
;
1289 struct sge
*s
= &adapter
->sge
;
1292 if (rp
->rx_pending
> MAX_RX_BUFFERS
||
1293 rp
->rx_jumbo_pending
||
1294 rp
->tx_pending
> MAX_TXQ_ENTRIES
||
1295 rp
->rx_mini_pending
> MAX_RSPQ_ENTRIES
||
1296 rp
->rx_mini_pending
< MIN_RSPQ_ENTRIES
||
1297 rp
->rx_pending
< MIN_FL_ENTRIES
||
1298 rp
->tx_pending
< MIN_TXQ_ENTRIES
)
1301 if (adapter
->flags
& FULL_INIT_DONE
)
1304 for (qs
= pi
->first_qset
; qs
< pi
->first_qset
+ pi
->nqsets
; qs
++) {
1305 s
->ethrxq
[qs
].fl
.size
= rp
->rx_pending
+ MIN_FL_RESID
;
1306 s
->ethrxq
[qs
].rspq
.size
= rp
->rx_mini_pending
;
1307 s
->ethtxq
[qs
].q
.size
= rp
->tx_pending
;
1313 * Return the interrupt holdoff timer and count for the first Queue Set on the
1314 * device. Our extension ioctl() (the cxgbtool interface) allows the
1315 * interrupt holdoff timer to be read on all of the device's Queue Sets.
1317 static int cxgb4vf_get_coalesce(struct net_device
*dev
,
1318 struct ethtool_coalesce
*coalesce
)
1320 const struct port_info
*pi
= netdev_priv(dev
);
1321 const struct adapter
*adapter
= pi
->adapter
;
1322 const struct sge_rspq
*rspq
= &adapter
->sge
.ethrxq
[pi
->first_qset
].rspq
;
1324 coalesce
->rx_coalesce_usecs
= qtimer_val(adapter
, rspq
);
1325 coalesce
->rx_max_coalesced_frames
=
1326 ((rspq
->intr_params
& QINTR_CNT_EN
)
1327 ? adapter
->sge
.counter_val
[rspq
->pktcnt_idx
]
1333 * Set the RX interrupt holdoff timer and count for the first Queue Set on the
1334 * interface. Our extension ioctl() (the cxgbtool interface) allows us to set
1335 * the interrupt holdoff timer on any of the device's Queue Sets.
1337 static int cxgb4vf_set_coalesce(struct net_device
*dev
,
1338 struct ethtool_coalesce
*coalesce
)
1340 const struct port_info
*pi
= netdev_priv(dev
);
1341 struct adapter
*adapter
= pi
->adapter
;
1343 return set_rxq_intr_params(adapter
,
1344 &adapter
->sge
.ethrxq
[pi
->first_qset
].rspq
,
1345 coalesce
->rx_coalesce_usecs
,
1346 coalesce
->rx_max_coalesced_frames
);
1350 * Report current port link pause parameter settings.
1352 static void cxgb4vf_get_pauseparam(struct net_device
*dev
,
1353 struct ethtool_pauseparam
*pauseparam
)
1355 struct port_info
*pi
= netdev_priv(dev
);
1357 pauseparam
->autoneg
= (pi
->link_cfg
.requested_fc
& PAUSE_AUTONEG
) != 0;
1358 pauseparam
->rx_pause
= (pi
->link_cfg
.fc
& PAUSE_RX
) != 0;
1359 pauseparam
->tx_pause
= (pi
->link_cfg
.fc
& PAUSE_TX
) != 0;
1363 * Identify the port by blinking the port's LED.
1365 static int cxgb4vf_phys_id(struct net_device
*dev
,
1366 enum ethtool_phys_id_state state
)
1369 struct port_info
*pi
= netdev_priv(dev
);
1371 if (state
== ETHTOOL_ID_ACTIVE
)
1373 else if (state
== ETHTOOL_ID_INACTIVE
)
1378 return t4vf_identify_port(pi
->adapter
, pi
->viid
, val
);
1382 * Port stats maintained per queue of the port.
1384 struct queue_port_stats
{
1395 * Strings for the ETH_SS_STATS statistics set ("ethtool -S"). Note that
1396 * these need to match the order of statistics returned by
1397 * t4vf_get_port_stats().
1399 static const char stats_strings
[][ETH_GSTRING_LEN
] = {
1401 * These must match the layout of the t4vf_port_stats structure.
1403 "TxBroadcastBytes ",
1404 "TxBroadcastFrames ",
1405 "TxMulticastBytes ",
1406 "TxMulticastFrames ",
1412 "RxBroadcastBytes ",
1413 "RxBroadcastFrames ",
1414 "RxMulticastBytes ",
1415 "RxMulticastFrames ",
1421 * These are accumulated per-queue statistics and must match the
1422 * order of the fields in the queue_port_stats structure.
1434 * Return the number of statistics in the specified statistics set.
1436 static int cxgb4vf_get_sset_count(struct net_device
*dev
, int sset
)
1440 return ARRAY_SIZE(stats_strings
);
1448 * Return the strings for the specified statistics set.
1450 static void cxgb4vf_get_strings(struct net_device
*dev
,
1456 memcpy(data
, stats_strings
, sizeof(stats_strings
));
1462 * Small utility routine to accumulate queue statistics across the queues of
1465 static void collect_sge_port_stats(const struct adapter
*adapter
,
1466 const struct port_info
*pi
,
1467 struct queue_port_stats
*stats
)
1469 const struct sge_eth_txq
*txq
= &adapter
->sge
.ethtxq
[pi
->first_qset
];
1470 const struct sge_eth_rxq
*rxq
= &adapter
->sge
.ethrxq
[pi
->first_qset
];
1473 memset(stats
, 0, sizeof(*stats
));
1474 for (qs
= 0; qs
< pi
->nqsets
; qs
++, rxq
++, txq
++) {
1475 stats
->tso
+= txq
->tso
;
1476 stats
->tx_csum
+= txq
->tx_cso
;
1477 stats
->rx_csum
+= rxq
->stats
.rx_cso
;
1478 stats
->vlan_ex
+= rxq
->stats
.vlan_ex
;
1479 stats
->vlan_ins
+= txq
->vlan_ins
;
1480 stats
->lro_pkts
+= rxq
->stats
.lro_pkts
;
1481 stats
->lro_merged
+= rxq
->stats
.lro_merged
;
1486 * Return the ETH_SS_STATS statistics set.
1488 static void cxgb4vf_get_ethtool_stats(struct net_device
*dev
,
1489 struct ethtool_stats
*stats
,
1492 struct port_info
*pi
= netdev2pinfo(dev
);
1493 struct adapter
*adapter
= pi
->adapter
;
1494 int err
= t4vf_get_port_stats(adapter
, pi
->pidx
,
1495 (struct t4vf_port_stats
*)data
);
1497 memset(data
, 0, sizeof(struct t4vf_port_stats
));
1499 data
+= sizeof(struct t4vf_port_stats
) / sizeof(u64
);
1500 collect_sge_port_stats(adapter
, pi
, (struct queue_port_stats
*)data
);
1504 * Return the size of our register map.
1506 static int cxgb4vf_get_regs_len(struct net_device
*dev
)
1508 return T4VF_REGMAP_SIZE
;
1512 * Dump a block of registers, start to end inclusive, into a buffer.
1514 static void reg_block_dump(struct adapter
*adapter
, void *regbuf
,
1515 unsigned int start
, unsigned int end
)
1517 u32
*bp
= regbuf
+ start
- T4VF_REGMAP_START
;
1519 for ( ; start
<= end
; start
+= sizeof(u32
)) {
1521 * Avoid reading the Mailbox Control register since that
1522 * can trigger a Mailbox Ownership Arbitration cycle and
1523 * interfere with communication with the firmware.
1525 if (start
== T4VF_CIM_BASE_ADDR
+ CIM_VF_EXT_MAILBOX_CTRL
)
1528 *bp
++ = t4_read_reg(adapter
, start
);
1533 * Copy our entire register map into the provided buffer.
1535 static void cxgb4vf_get_regs(struct net_device
*dev
,
1536 struct ethtool_regs
*regs
,
1539 struct adapter
*adapter
= netdev2adap(dev
);
1541 regs
->version
= mk_adap_vers(adapter
);
1544 * Fill in register buffer with our register map.
1546 memset(regbuf
, 0, T4VF_REGMAP_SIZE
);
1548 reg_block_dump(adapter
, regbuf
,
1549 T4VF_SGE_BASE_ADDR
+ T4VF_MOD_MAP_SGE_FIRST
,
1550 T4VF_SGE_BASE_ADDR
+ T4VF_MOD_MAP_SGE_LAST
);
1551 reg_block_dump(adapter
, regbuf
,
1552 T4VF_MPS_BASE_ADDR
+ T4VF_MOD_MAP_MPS_FIRST
,
1553 T4VF_MPS_BASE_ADDR
+ T4VF_MOD_MAP_MPS_LAST
);
1555 /* T5 adds new registers in the PL Register map.
1557 reg_block_dump(adapter
, regbuf
,
1558 T4VF_PL_BASE_ADDR
+ T4VF_MOD_MAP_PL_FIRST
,
1559 T4VF_PL_BASE_ADDR
+ (is_t4(adapter
->params
.chip
)
1560 ? A_PL_VF_WHOAMI
: A_PL_VF_REVISION
));
1561 reg_block_dump(adapter
, regbuf
,
1562 T4VF_CIM_BASE_ADDR
+ T4VF_MOD_MAP_CIM_FIRST
,
1563 T4VF_CIM_BASE_ADDR
+ T4VF_MOD_MAP_CIM_LAST
);
1565 reg_block_dump(adapter
, regbuf
,
1566 T4VF_MBDATA_BASE_ADDR
+ T4VF_MBDATA_FIRST
,
1567 T4VF_MBDATA_BASE_ADDR
+ T4VF_MBDATA_LAST
);
1571 * Report current Wake On LAN settings.
1573 static void cxgb4vf_get_wol(struct net_device
*dev
,
1574 struct ethtool_wolinfo
*wol
)
1578 memset(&wol
->sopass
, 0, sizeof(wol
->sopass
));
1582 * TCP Segmentation Offload flags which we support.
1584 #define TSO_FLAGS (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)
1586 static const struct ethtool_ops cxgb4vf_ethtool_ops
= {
1587 .get_settings
= cxgb4vf_get_settings
,
1588 .get_drvinfo
= cxgb4vf_get_drvinfo
,
1589 .get_msglevel
= cxgb4vf_get_msglevel
,
1590 .set_msglevel
= cxgb4vf_set_msglevel
,
1591 .get_ringparam
= cxgb4vf_get_ringparam
,
1592 .set_ringparam
= cxgb4vf_set_ringparam
,
1593 .get_coalesce
= cxgb4vf_get_coalesce
,
1594 .set_coalesce
= cxgb4vf_set_coalesce
,
1595 .get_pauseparam
= cxgb4vf_get_pauseparam
,
1596 .get_link
= ethtool_op_get_link
,
1597 .get_strings
= cxgb4vf_get_strings
,
1598 .set_phys_id
= cxgb4vf_phys_id
,
1599 .get_sset_count
= cxgb4vf_get_sset_count
,
1600 .get_ethtool_stats
= cxgb4vf_get_ethtool_stats
,
1601 .get_regs_len
= cxgb4vf_get_regs_len
,
1602 .get_regs
= cxgb4vf_get_regs
,
1603 .get_wol
= cxgb4vf_get_wol
,
1607 * /sys/kernel/debug/cxgb4vf support code and data.
1608 * ================================================
1612 * Show SGE Queue Set information. We display QPL Queues Sets per line.
1616 static int sge_qinfo_show(struct seq_file
*seq
, void *v
)
1618 struct adapter
*adapter
= seq
->private;
1619 int eth_entries
= DIV_ROUND_UP(adapter
->sge
.ethqsets
, QPL
);
1620 int qs
, r
= (uintptr_t)v
- 1;
1623 seq_putc(seq
, '\n');
1625 #define S3(fmt_spec, s, v) \
1627 seq_printf(seq, "%-12s", s); \
1628 for (qs = 0; qs < n; ++qs) \
1629 seq_printf(seq, " %16" fmt_spec, v); \
1630 seq_putc(seq, '\n'); \
1632 #define S(s, v) S3("s", s, v)
1633 #define T(s, v) S3("u", s, txq[qs].v)
1634 #define R(s, v) S3("u", s, rxq[qs].v)
1636 if (r
< eth_entries
) {
1637 const struct sge_eth_rxq
*rxq
= &adapter
->sge
.ethrxq
[r
* QPL
];
1638 const struct sge_eth_txq
*txq
= &adapter
->sge
.ethtxq
[r
* QPL
];
1639 int n
= min(QPL
, adapter
->sge
.ethqsets
- QPL
* r
);
1641 S("QType:", "Ethernet");
1643 (rxq
[qs
].rspq
.netdev
1644 ? rxq
[qs
].rspq
.netdev
->name
1647 (rxq
[qs
].rspq
.netdev
1648 ? ((struct port_info
*)
1649 netdev_priv(rxq
[qs
].rspq
.netdev
))->port_id
1651 T("TxQ ID:", q
.abs_id
);
1652 T("TxQ size:", q
.size
);
1653 T("TxQ inuse:", q
.in_use
);
1654 T("TxQ PIdx:", q
.pidx
);
1655 T("TxQ CIdx:", q
.cidx
);
1656 R("RspQ ID:", rspq
.abs_id
);
1657 R("RspQ size:", rspq
.size
);
1658 R("RspQE size:", rspq
.iqe_len
);
1659 S3("u", "Intr delay:", qtimer_val(adapter
, &rxq
[qs
].rspq
));
1660 S3("u", "Intr pktcnt:",
1661 adapter
->sge
.counter_val
[rxq
[qs
].rspq
.pktcnt_idx
]);
1662 R("RspQ CIdx:", rspq
.cidx
);
1663 R("RspQ Gen:", rspq
.gen
);
1664 R("FL ID:", fl
.abs_id
);
1665 R("FL size:", fl
.size
- MIN_FL_RESID
);
1666 R("FL avail:", fl
.avail
);
1667 R("FL PIdx:", fl
.pidx
);
1668 R("FL CIdx:", fl
.cidx
);
1674 const struct sge_rspq
*evtq
= &adapter
->sge
.fw_evtq
;
1676 seq_printf(seq
, "%-12s %16s\n", "QType:", "FW event queue");
1677 seq_printf(seq
, "%-12s %16u\n", "RspQ ID:", evtq
->abs_id
);
1678 seq_printf(seq
, "%-12s %16u\n", "Intr delay:",
1679 qtimer_val(adapter
, evtq
));
1680 seq_printf(seq
, "%-12s %16u\n", "Intr pktcnt:",
1681 adapter
->sge
.counter_val
[evtq
->pktcnt_idx
]);
1682 seq_printf(seq
, "%-12s %16u\n", "RspQ Cidx:", evtq
->cidx
);
1683 seq_printf(seq
, "%-12s %16u\n", "RspQ Gen:", evtq
->gen
);
1684 } else if (r
== 1) {
1685 const struct sge_rspq
*intrq
= &adapter
->sge
.intrq
;
1687 seq_printf(seq
, "%-12s %16s\n", "QType:", "Interrupt Queue");
1688 seq_printf(seq
, "%-12s %16u\n", "RspQ ID:", intrq
->abs_id
);
1689 seq_printf(seq
, "%-12s %16u\n", "Intr delay:",
1690 qtimer_val(adapter
, intrq
));
1691 seq_printf(seq
, "%-12s %16u\n", "Intr pktcnt:",
1692 adapter
->sge
.counter_val
[intrq
->pktcnt_idx
]);
1693 seq_printf(seq
, "%-12s %16u\n", "RspQ Cidx:", intrq
->cidx
);
1694 seq_printf(seq
, "%-12s %16u\n", "RspQ Gen:", intrq
->gen
);
1706 * Return the number of "entries" in our "file". We group the multi-Queue
1707 * sections with QPL Queue Sets per "entry". The sections of the output are:
1709 * Ethernet RX/TX Queue Sets
1710 * Firmware Event Queue
1711 * Forwarded Interrupt Queue (if in MSI mode)
1713 static int sge_queue_entries(const struct adapter
*adapter
)
1715 return DIV_ROUND_UP(adapter
->sge
.ethqsets
, QPL
) + 1 +
1716 ((adapter
->flags
& USING_MSI
) != 0);
1719 static void *sge_queue_start(struct seq_file
*seq
, loff_t
*pos
)
1721 int entries
= sge_queue_entries(seq
->private);
1723 return *pos
< entries
? (void *)((uintptr_t)*pos
+ 1) : NULL
;
1726 static void sge_queue_stop(struct seq_file
*seq
, void *v
)
1730 static void *sge_queue_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1732 int entries
= sge_queue_entries(seq
->private);
1735 return *pos
< entries
? (void *)((uintptr_t)*pos
+ 1) : NULL
;
1738 static const struct seq_operations sge_qinfo_seq_ops
= {
1739 .start
= sge_queue_start
,
1740 .next
= sge_queue_next
,
1741 .stop
= sge_queue_stop
,
1742 .show
= sge_qinfo_show
1745 static int sge_qinfo_open(struct inode
*inode
, struct file
*file
)
1747 int res
= seq_open(file
, &sge_qinfo_seq_ops
);
1750 struct seq_file
*seq
= file
->private_data
;
1751 seq
->private = inode
->i_private
;
1756 static const struct file_operations sge_qinfo_debugfs_fops
= {
1757 .owner
= THIS_MODULE
,
1758 .open
= sge_qinfo_open
,
1760 .llseek
= seq_lseek
,
1761 .release
= seq_release
,
1765 * Show SGE Queue Set statistics. We display QPL Queues Sets per line.
1769 static int sge_qstats_show(struct seq_file
*seq
, void *v
)
1771 struct adapter
*adapter
= seq
->private;
1772 int eth_entries
= DIV_ROUND_UP(adapter
->sge
.ethqsets
, QPL
);
1773 int qs
, r
= (uintptr_t)v
- 1;
1776 seq_putc(seq
, '\n');
1778 #define S3(fmt, s, v) \
1780 seq_printf(seq, "%-16s", s); \
1781 for (qs = 0; qs < n; ++qs) \
1782 seq_printf(seq, " %8" fmt, v); \
1783 seq_putc(seq, '\n'); \
1785 #define S(s, v) S3("s", s, v)
1787 #define T3(fmt, s, v) S3(fmt, s, txq[qs].v)
1788 #define T(s, v) T3("lu", s, v)
1790 #define R3(fmt, s, v) S3(fmt, s, rxq[qs].v)
1791 #define R(s, v) R3("lu", s, v)
1793 if (r
< eth_entries
) {
1794 const struct sge_eth_rxq
*rxq
= &adapter
->sge
.ethrxq
[r
* QPL
];
1795 const struct sge_eth_txq
*txq
= &adapter
->sge
.ethtxq
[r
* QPL
];
1796 int n
= min(QPL
, adapter
->sge
.ethqsets
- QPL
* r
);
1798 S("QType:", "Ethernet");
1800 (rxq
[qs
].rspq
.netdev
1801 ? rxq
[qs
].rspq
.netdev
->name
1803 R3("u", "RspQNullInts:", rspq
.unhandled_irqs
);
1804 R("RxPackets:", stats
.pkts
);
1805 R("RxCSO:", stats
.rx_cso
);
1806 R("VLANxtract:", stats
.vlan_ex
);
1807 R("LROmerged:", stats
.lro_merged
);
1808 R("LROpackets:", stats
.lro_pkts
);
1809 R("RxDrops:", stats
.rx_drops
);
1811 T("TxCSO:", tx_cso
);
1812 T("VLANins:", vlan_ins
);
1813 T("TxQFull:", q
.stops
);
1814 T("TxQRestarts:", q
.restarts
);
1815 T("TxMapErr:", mapping_err
);
1816 R("FLAllocErr:", fl
.alloc_failed
);
1817 R("FLLrgAlcErr:", fl
.large_alloc_failed
);
1818 R("FLStarving:", fl
.starving
);
1824 const struct sge_rspq
*evtq
= &adapter
->sge
.fw_evtq
;
1826 seq_printf(seq
, "%-8s %16s\n", "QType:", "FW event queue");
1827 seq_printf(seq
, "%-16s %8u\n", "RspQNullInts:",
1828 evtq
->unhandled_irqs
);
1829 seq_printf(seq
, "%-16s %8u\n", "RspQ CIdx:", evtq
->cidx
);
1830 seq_printf(seq
, "%-16s %8u\n", "RspQ Gen:", evtq
->gen
);
1831 } else if (r
== 1) {
1832 const struct sge_rspq
*intrq
= &adapter
->sge
.intrq
;
1834 seq_printf(seq
, "%-8s %16s\n", "QType:", "Interrupt Queue");
1835 seq_printf(seq
, "%-16s %8u\n", "RspQNullInts:",
1836 intrq
->unhandled_irqs
);
1837 seq_printf(seq
, "%-16s %8u\n", "RspQ CIdx:", intrq
->cidx
);
1838 seq_printf(seq
, "%-16s %8u\n", "RspQ Gen:", intrq
->gen
);
1852 * Return the number of "entries" in our "file". We group the multi-Queue
1853 * sections with QPL Queue Sets per "entry". The sections of the output are:
1855 * Ethernet RX/TX Queue Sets
1856 * Firmware Event Queue
1857 * Forwarded Interrupt Queue (if in MSI mode)
1859 static int sge_qstats_entries(const struct adapter
*adapter
)
1861 return DIV_ROUND_UP(adapter
->sge
.ethqsets
, QPL
) + 1 +
1862 ((adapter
->flags
& USING_MSI
) != 0);
1865 static void *sge_qstats_start(struct seq_file
*seq
, loff_t
*pos
)
1867 int entries
= sge_qstats_entries(seq
->private);
1869 return *pos
< entries
? (void *)((uintptr_t)*pos
+ 1) : NULL
;
1872 static void sge_qstats_stop(struct seq_file
*seq
, void *v
)
1876 static void *sge_qstats_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1878 int entries
= sge_qstats_entries(seq
->private);
1881 return *pos
< entries
? (void *)((uintptr_t)*pos
+ 1) : NULL
;
1884 static const struct seq_operations sge_qstats_seq_ops
= {
1885 .start
= sge_qstats_start
,
1886 .next
= sge_qstats_next
,
1887 .stop
= sge_qstats_stop
,
1888 .show
= sge_qstats_show
1891 static int sge_qstats_open(struct inode
*inode
, struct file
*file
)
1893 int res
= seq_open(file
, &sge_qstats_seq_ops
);
1896 struct seq_file
*seq
= file
->private_data
;
1897 seq
->private = inode
->i_private
;
1902 static const struct file_operations sge_qstats_proc_fops
= {
1903 .owner
= THIS_MODULE
,
1904 .open
= sge_qstats_open
,
1906 .llseek
= seq_lseek
,
1907 .release
= seq_release
,
1911 * Show PCI-E SR-IOV Virtual Function Resource Limits.
1913 static int resources_show(struct seq_file
*seq
, void *v
)
1915 struct adapter
*adapter
= seq
->private;
1916 struct vf_resources
*vfres
= &adapter
->params
.vfres
;
1918 #define S(desc, fmt, var) \
1919 seq_printf(seq, "%-60s " fmt "\n", \
1920 desc " (" #var "):", vfres->var)
1922 S("Virtual Interfaces", "%d", nvi
);
1923 S("Egress Queues", "%d", neq
);
1924 S("Ethernet Control", "%d", nethctrl
);
1925 S("Ingress Queues/w Free Lists/Interrupts", "%d", niqflint
);
1926 S("Ingress Queues", "%d", niq
);
1927 S("Traffic Class", "%d", tc
);
1928 S("Port Access Rights Mask", "%#x", pmask
);
1929 S("MAC Address Filters", "%d", nexactf
);
1930 S("Firmware Command Read Capabilities", "%#x", r_caps
);
1931 S("Firmware Command Write/Execute Capabilities", "%#x", wx_caps
);
1938 static int resources_open(struct inode
*inode
, struct file
*file
)
1940 return single_open(file
, resources_show
, inode
->i_private
);
1943 static const struct file_operations resources_proc_fops
= {
1944 .owner
= THIS_MODULE
,
1945 .open
= resources_open
,
1947 .llseek
= seq_lseek
,
1948 .release
= single_release
,
1952 * Show Virtual Interfaces.
1954 static int interfaces_show(struct seq_file
*seq
, void *v
)
1956 if (v
== SEQ_START_TOKEN
) {
1957 seq_puts(seq
, "Interface Port VIID\n");
1959 struct adapter
*adapter
= seq
->private;
1960 int pidx
= (uintptr_t)v
- 2;
1961 struct net_device
*dev
= adapter
->port
[pidx
];
1962 struct port_info
*pi
= netdev_priv(dev
);
1964 seq_printf(seq
, "%9s %4d %#5x\n",
1965 dev
->name
, pi
->port_id
, pi
->viid
);
1970 static inline void *interfaces_get_idx(struct adapter
*adapter
, loff_t pos
)
1972 return pos
<= adapter
->params
.nports
1973 ? (void *)(uintptr_t)(pos
+ 1)
1977 static void *interfaces_start(struct seq_file
*seq
, loff_t
*pos
)
1980 ? interfaces_get_idx(seq
->private, *pos
)
1984 static void *interfaces_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
1987 return interfaces_get_idx(seq
->private, *pos
);
1990 static void interfaces_stop(struct seq_file
*seq
, void *v
)
1994 static const struct seq_operations interfaces_seq_ops
= {
1995 .start
= interfaces_start
,
1996 .next
= interfaces_next
,
1997 .stop
= interfaces_stop
,
1998 .show
= interfaces_show
2001 static int interfaces_open(struct inode
*inode
, struct file
*file
)
2003 int res
= seq_open(file
, &interfaces_seq_ops
);
2006 struct seq_file
*seq
= file
->private_data
;
2007 seq
->private = inode
->i_private
;
2012 static const struct file_operations interfaces_proc_fops
= {
2013 .owner
= THIS_MODULE
,
2014 .open
= interfaces_open
,
2016 .llseek
= seq_lseek
,
2017 .release
= seq_release
,
2021 * /sys/kernel/debugfs/cxgb4vf/ files list.
2023 struct cxgb4vf_debugfs_entry
{
2024 const char *name
; /* name of debugfs node */
2025 umode_t mode
; /* file system mode */
2026 const struct file_operations
*fops
;
2029 static struct cxgb4vf_debugfs_entry debugfs_files
[] = {
2030 { "sge_qinfo", S_IRUGO
, &sge_qinfo_debugfs_fops
},
2031 { "sge_qstats", S_IRUGO
, &sge_qstats_proc_fops
},
2032 { "resources", S_IRUGO
, &resources_proc_fops
},
2033 { "interfaces", S_IRUGO
, &interfaces_proc_fops
},
2037 * Module and device initialization and cleanup code.
2038 * ==================================================
2042 * Set up out /sys/kernel/debug/cxgb4vf sub-nodes. We assume that the
2043 * directory (debugfs_root) has already been set up.
2045 static int setup_debugfs(struct adapter
*adapter
)
2049 BUG_ON(IS_ERR_OR_NULL(adapter
->debugfs_root
));
2052 * Debugfs support is best effort.
2054 for (i
= 0; i
< ARRAY_SIZE(debugfs_files
); i
++)
2055 (void)debugfs_create_file(debugfs_files
[i
].name
,
2056 debugfs_files
[i
].mode
,
2057 adapter
->debugfs_root
,
2059 debugfs_files
[i
].fops
);
2065 * Tear down the /sys/kernel/debug/cxgb4vf sub-nodes created above. We leave
2066 * it to our caller to tear down the directory (debugfs_root).
2068 static void cleanup_debugfs(struct adapter
*adapter
)
2070 BUG_ON(IS_ERR_OR_NULL(adapter
->debugfs_root
));
2073 * Unlike our sister routine cleanup_proc(), we don't need to remove
2074 * individual entries because a call will be made to
2075 * debugfs_remove_recursive(). We just need to clean up any ancillary
2082 * Perform early "adapter" initialization. This is where we discover what
2083 * adapter parameters we're going to be using and initialize basic adapter
2086 static int adap_init0(struct adapter
*adapter
)
2088 struct vf_resources
*vfres
= &adapter
->params
.vfres
;
2089 struct sge_params
*sge_params
= &adapter
->params
.sge
;
2090 struct sge
*s
= &adapter
->sge
;
2091 unsigned int ethqsets
;
2094 unsigned int chipid
;
2097 * Wait for the device to become ready before proceeding ...
2099 err
= t4vf_wait_dev_ready(adapter
);
2101 dev_err(adapter
->pdev_dev
, "device didn't become ready:"
2107 * Some environments do not properly handle PCIE FLRs -- e.g. in Linux
2108 * 2.6.31 and later we can't call pci_reset_function() in order to
2109 * issue an FLR because of a self- deadlock on the device semaphore.
2110 * Meanwhile, the OS infrastructure doesn't issue FLRs in all the
2111 * cases where they're needed -- for instance, some versions of KVM
2112 * fail to reset "Assigned Devices" when the VM reboots. Therefore we
2113 * use the firmware based reset in order to reset any per function
2116 err
= t4vf_fw_reset(adapter
);
2118 dev_err(adapter
->pdev_dev
, "FW reset failed: err=%d\n", err
);
2122 adapter
->params
.chip
= 0;
2123 switch (adapter
->pdev
->device
>> 12) {
2125 adapter
->params
.chip
= CHELSIO_CHIP_CODE(CHELSIO_T4
, 0);
2128 chipid
= G_REV(t4_read_reg(adapter
, A_PL_VF_REV
));
2129 adapter
->params
.chip
|= CHELSIO_CHIP_CODE(CHELSIO_T5
, chipid
);
2134 * Grab basic operational parameters. These will predominantly have
2135 * been set up by the Physical Function Driver or will be hard coded
2136 * into the adapter. We just have to live with them ... Note that
2137 * we _must_ get our VPD parameters before our SGE parameters because
2138 * we need to know the adapter's core clock from the VPD in order to
2139 * properly decode the SGE Timer Values.
2141 err
= t4vf_get_dev_params(adapter
);
2143 dev_err(adapter
->pdev_dev
, "unable to retrieve adapter"
2144 " device parameters: err=%d\n", err
);
2147 err
= t4vf_get_vpd_params(adapter
);
2149 dev_err(adapter
->pdev_dev
, "unable to retrieve adapter"
2150 " VPD parameters: err=%d\n", err
);
2153 err
= t4vf_get_sge_params(adapter
);
2155 dev_err(adapter
->pdev_dev
, "unable to retrieve adapter"
2156 " SGE parameters: err=%d\n", err
);
2159 err
= t4vf_get_rss_glb_config(adapter
);
2161 dev_err(adapter
->pdev_dev
, "unable to retrieve adapter"
2162 " RSS parameters: err=%d\n", err
);
2165 if (adapter
->params
.rss
.mode
!=
2166 FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL
) {
2167 dev_err(adapter
->pdev_dev
, "unable to operate with global RSS"
2168 " mode %d\n", adapter
->params
.rss
.mode
);
2171 err
= t4vf_sge_init(adapter
);
2173 dev_err(adapter
->pdev_dev
, "unable to use adapter parameters:"
2178 /* If we're running on newer firmware, let it know that we're
2179 * prepared to deal with encapsulated CPL messages. Older
2180 * firmware won't understand this and we'll just get
2181 * unencapsulated messages ...
2183 param
= FW_PARAMS_MNEM(FW_PARAMS_MNEM_PFVF
) |
2184 FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_PFVF_CPLFW4MSG_ENCAP
);
2186 (void) t4vf_set_params(adapter
, 1, ¶m
, &val
);
2189 * Retrieve our RX interrupt holdoff timer values and counter
2190 * threshold values from the SGE parameters.
2192 s
->timer_val
[0] = core_ticks_to_us(adapter
,
2193 TIMERVALUE0_GET(sge_params
->sge_timer_value_0_and_1
));
2194 s
->timer_val
[1] = core_ticks_to_us(adapter
,
2195 TIMERVALUE1_GET(sge_params
->sge_timer_value_0_and_1
));
2196 s
->timer_val
[2] = core_ticks_to_us(adapter
,
2197 TIMERVALUE0_GET(sge_params
->sge_timer_value_2_and_3
));
2198 s
->timer_val
[3] = core_ticks_to_us(adapter
,
2199 TIMERVALUE1_GET(sge_params
->sge_timer_value_2_and_3
));
2200 s
->timer_val
[4] = core_ticks_to_us(adapter
,
2201 TIMERVALUE0_GET(sge_params
->sge_timer_value_4_and_5
));
2202 s
->timer_val
[5] = core_ticks_to_us(adapter
,
2203 TIMERVALUE1_GET(sge_params
->sge_timer_value_4_and_5
));
2206 THRESHOLD_0_GET(sge_params
->sge_ingress_rx_threshold
);
2208 THRESHOLD_1_GET(sge_params
->sge_ingress_rx_threshold
);
2210 THRESHOLD_2_GET(sge_params
->sge_ingress_rx_threshold
);
2212 THRESHOLD_3_GET(sge_params
->sge_ingress_rx_threshold
);
2215 * Grab our Virtual Interface resource allocation, extract the
2216 * features that we're interested in and do a bit of sanity testing on
2219 err
= t4vf_get_vfres(adapter
);
2221 dev_err(adapter
->pdev_dev
, "unable to get virtual interface"
2222 " resources: err=%d\n", err
);
2227 * The number of "ports" which we support is equal to the number of
2228 * Virtual Interfaces with which we've been provisioned.
2230 adapter
->params
.nports
= vfres
->nvi
;
2231 if (adapter
->params
.nports
> MAX_NPORTS
) {
2232 dev_warn(adapter
->pdev_dev
, "only using %d of %d allowed"
2233 " virtual interfaces\n", MAX_NPORTS
,
2234 adapter
->params
.nports
);
2235 adapter
->params
.nports
= MAX_NPORTS
;
2239 * We need to reserve a number of the ingress queues with Free List
2240 * and Interrupt capabilities for special interrupt purposes (like
2241 * asynchronous firmware messages, or forwarded interrupts if we're
2242 * using MSI). The rest of the FL/Intr-capable ingress queues will be
2243 * matched up one-for-one with Ethernet/Control egress queues in order
2244 * to form "Queue Sets" which will be aportioned between the "ports".
2245 * For each Queue Set, we'll need the ability to allocate two Egress
2246 * Contexts -- one for the Ingress Queue Free List and one for the TX
2249 ethqsets
= vfres
->niqflint
- INGQ_EXTRAS
;
2250 if (vfres
->nethctrl
!= ethqsets
) {
2251 dev_warn(adapter
->pdev_dev
, "unequal number of [available]"
2252 " ingress/egress queues (%d/%d); using minimum for"
2253 " number of Queue Sets\n", ethqsets
, vfres
->nethctrl
);
2254 ethqsets
= min(vfres
->nethctrl
, ethqsets
);
2256 if (vfres
->neq
< ethqsets
*2) {
2257 dev_warn(adapter
->pdev_dev
, "Not enough Egress Contexts (%d)"
2258 " to support Queue Sets (%d); reducing allowed Queue"
2259 " Sets\n", vfres
->neq
, ethqsets
);
2260 ethqsets
= vfres
->neq
/2;
2262 if (ethqsets
> MAX_ETH_QSETS
) {
2263 dev_warn(adapter
->pdev_dev
, "only using %d of %d allowed Queue"
2264 " Sets\n", MAX_ETH_QSETS
, adapter
->sge
.max_ethqsets
);
2265 ethqsets
= MAX_ETH_QSETS
;
2267 if (vfres
->niq
!= 0 || vfres
->neq
> ethqsets
*2) {
2268 dev_warn(adapter
->pdev_dev
, "unused resources niq/neq (%d/%d)"
2269 " ignored\n", vfres
->niq
, vfres
->neq
- ethqsets
*2);
2271 adapter
->sge
.max_ethqsets
= ethqsets
;
2274 * Check for various parameter sanity issues. Most checks simply
2275 * result in us using fewer resources than our provissioning but we
2276 * do need at least one "port" with which to work ...
2278 if (adapter
->sge
.max_ethqsets
< adapter
->params
.nports
) {
2279 dev_warn(adapter
->pdev_dev
, "only using %d of %d available"
2280 " virtual interfaces (too few Queue Sets)\n",
2281 adapter
->sge
.max_ethqsets
, adapter
->params
.nports
);
2282 adapter
->params
.nports
= adapter
->sge
.max_ethqsets
;
2284 if (adapter
->params
.nports
== 0) {
2285 dev_err(adapter
->pdev_dev
, "no virtual interfaces configured/"
2292 static inline void init_rspq(struct sge_rspq
*rspq
, u8 timer_idx
,
2293 u8 pkt_cnt_idx
, unsigned int size
,
2294 unsigned int iqe_size
)
2296 rspq
->intr_params
= (QINTR_TIMER_IDX(timer_idx
) |
2297 (pkt_cnt_idx
< SGE_NCOUNTERS
? QINTR_CNT_EN
: 0));
2298 rspq
->pktcnt_idx
= (pkt_cnt_idx
< SGE_NCOUNTERS
2301 rspq
->iqe_len
= iqe_size
;
2306 * Perform default configuration of DMA queues depending on the number and
2307 * type of ports we found and the number of available CPUs. Most settings can
2308 * be modified by the admin via ethtool and cxgbtool prior to the adapter
2309 * being brought up for the first time.
2311 static void cfg_queues(struct adapter
*adapter
)
2313 struct sge
*s
= &adapter
->sge
;
2314 int q10g
, n10g
, qidx
, pidx
, qs
;
2318 * We should not be called till we know how many Queue Sets we can
2319 * support. In particular, this means that we need to know what kind
2320 * of interrupts we'll be using ...
2322 BUG_ON((adapter
->flags
& (USING_MSIX
|USING_MSI
)) == 0);
2325 * Count the number of 10GbE Virtual Interfaces that we have.
2328 for_each_port(adapter
, pidx
)
2329 n10g
+= is_10g_port(&adap2pinfo(adapter
, pidx
)->link_cfg
);
2332 * We default to 1 queue per non-10G port and up to # of cores queues
2338 int n1g
= (adapter
->params
.nports
- n10g
);
2339 q10g
= (adapter
->sge
.max_ethqsets
- n1g
) / n10g
;
2340 if (q10g
> num_online_cpus())
2341 q10g
= num_online_cpus();
2345 * Allocate the "Queue Sets" to the various Virtual Interfaces.
2346 * The layout will be established in setup_sge_queues() when the
2347 * adapter is brough up for the first time.
2350 for_each_port(adapter
, pidx
) {
2351 struct port_info
*pi
= adap2pinfo(adapter
, pidx
);
2353 pi
->first_qset
= qidx
;
2354 pi
->nqsets
= is_10g_port(&pi
->link_cfg
) ? q10g
: 1;
2360 * The Ingress Queue Entry Size for our various Response Queues needs
2361 * to be big enough to accommodate the largest message we can receive
2362 * from the chip/firmware; which is 64 bytes ...
2367 * Set up default Queue Set parameters ... Start off with the
2368 * shortest interrupt holdoff timer.
2370 for (qs
= 0; qs
< s
->max_ethqsets
; qs
++) {
2371 struct sge_eth_rxq
*rxq
= &s
->ethrxq
[qs
];
2372 struct sge_eth_txq
*txq
= &s
->ethtxq
[qs
];
2374 init_rspq(&rxq
->rspq
, 0, 0, 1024, iqe_size
);
2380 * The firmware event queue is used for link state changes and
2381 * notifications of TX DMA completions.
2383 init_rspq(&s
->fw_evtq
, SGE_TIMER_RSTRT_CNTR
, 0, 512, iqe_size
);
2386 * The forwarded interrupt queue is used when we're in MSI interrupt
2387 * mode. In this mode all interrupts associated with RX queues will
2388 * be forwarded to a single queue which we'll associate with our MSI
2389 * interrupt vector. The messages dropped in the forwarded interrupt
2390 * queue will indicate which ingress queue needs servicing ... This
2391 * queue needs to be large enough to accommodate all of the ingress
2392 * queues which are forwarding their interrupt (+1 to prevent the PIDX
2393 * from equalling the CIDX if every ingress queue has an outstanding
2394 * interrupt). The queue doesn't need to be any larger because no
2395 * ingress queue will ever have more than one outstanding interrupt at
2398 init_rspq(&s
->intrq
, SGE_TIMER_RSTRT_CNTR
, 0, MSIX_ENTRIES
+ 1,
2403 * Reduce the number of Ethernet queues across all ports to at most n.
2404 * n provides at least one queue per port.
2406 static void reduce_ethqs(struct adapter
*adapter
, int n
)
2409 struct port_info
*pi
;
2412 * While we have too many active Ether Queue Sets, interate across the
2413 * "ports" and reduce their individual Queue Set allocations.
2415 BUG_ON(n
< adapter
->params
.nports
);
2416 while (n
< adapter
->sge
.ethqsets
)
2417 for_each_port(adapter
, i
) {
2418 pi
= adap2pinfo(adapter
, i
);
2419 if (pi
->nqsets
> 1) {
2421 adapter
->sge
.ethqsets
--;
2422 if (adapter
->sge
.ethqsets
<= n
)
2428 * Reassign the starting Queue Sets for each of the "ports" ...
2431 for_each_port(adapter
, i
) {
2432 pi
= adap2pinfo(adapter
, i
);
2439 * We need to grab enough MSI-X vectors to cover our interrupt needs. Ideally
2440 * we get a separate MSI-X vector for every "Queue Set" plus any extras we
2441 * need. Minimally we need one for every Virtual Interface plus those needed
2442 * for our "extras". Note that this process may lower the maximum number of
2443 * allowed Queue Sets ...
2445 static int enable_msix(struct adapter
*adapter
)
2447 int i
, want
, need
, nqsets
;
2448 struct msix_entry entries
[MSIX_ENTRIES
];
2449 struct sge
*s
= &adapter
->sge
;
2451 for (i
= 0; i
< MSIX_ENTRIES
; ++i
)
2452 entries
[i
].entry
= i
;
2455 * We _want_ enough MSI-X interrupts to cover all of our "Queue Sets"
2456 * plus those needed for our "extras" (for example, the firmware
2457 * message queue). We _need_ at least one "Queue Set" per Virtual
2458 * Interface plus those needed for our "extras". So now we get to see
2459 * if the song is right ...
2461 want
= s
->max_ethqsets
+ MSIX_EXTRAS
;
2462 need
= adapter
->params
.nports
+ MSIX_EXTRAS
;
2464 want
= pci_enable_msix_range(adapter
->pdev
, entries
, need
, want
);
2468 nqsets
= want
- MSIX_EXTRAS
;
2469 if (nqsets
< s
->max_ethqsets
) {
2470 dev_warn(adapter
->pdev_dev
, "only enough MSI-X vectors"
2471 " for %d Queue Sets\n", nqsets
);
2472 s
->max_ethqsets
= nqsets
;
2473 if (nqsets
< s
->ethqsets
)
2474 reduce_ethqs(adapter
, nqsets
);
2476 for (i
= 0; i
< want
; ++i
)
2477 adapter
->msix_info
[i
].vec
= entries
[i
].vector
;
2482 static const struct net_device_ops cxgb4vf_netdev_ops
= {
2483 .ndo_open
= cxgb4vf_open
,
2484 .ndo_stop
= cxgb4vf_stop
,
2485 .ndo_start_xmit
= t4vf_eth_xmit
,
2486 .ndo_get_stats
= cxgb4vf_get_stats
,
2487 .ndo_set_rx_mode
= cxgb4vf_set_rxmode
,
2488 .ndo_set_mac_address
= cxgb4vf_set_mac_addr
,
2489 .ndo_validate_addr
= eth_validate_addr
,
2490 .ndo_do_ioctl
= cxgb4vf_do_ioctl
,
2491 .ndo_change_mtu
= cxgb4vf_change_mtu
,
2492 .ndo_fix_features
= cxgb4vf_fix_features
,
2493 .ndo_set_features
= cxgb4vf_set_features
,
2494 #ifdef CONFIG_NET_POLL_CONTROLLER
2495 .ndo_poll_controller
= cxgb4vf_poll_controller
,
2500 * "Probe" a device: initialize a device and construct all kernel and driver
2501 * state needed to manage the device. This routine is called "init_one" in
2504 static int cxgb4vf_pci_probe(struct pci_dev
*pdev
,
2505 const struct pci_device_id
*ent
)
2510 struct adapter
*adapter
;
2511 struct port_info
*pi
;
2512 struct net_device
*netdev
;
2515 * Print our driver banner the first time we're called to initialize a
2518 pr_info_once("%s - version %s\n", DRV_DESC
, DRV_VERSION
);
2521 * Initialize generic PCI device state.
2523 err
= pci_enable_device(pdev
);
2525 dev_err(&pdev
->dev
, "cannot enable PCI device\n");
2530 * Reserve PCI resources for the device. If we can't get them some
2531 * other driver may have already claimed the device ...
2533 err
= pci_request_regions(pdev
, KBUILD_MODNAME
);
2535 dev_err(&pdev
->dev
, "cannot obtain PCI resources\n");
2536 goto err_disable_device
;
2540 * Set up our DMA mask: try for 64-bit address masking first and
2541 * fall back to 32-bit if we can't get 64 bits ...
2543 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(64));
2545 err
= pci_set_consistent_dma_mask(pdev
, DMA_BIT_MASK(64));
2547 dev_err(&pdev
->dev
, "unable to obtain 64-bit DMA for"
2548 " coherent allocations\n");
2549 goto err_release_regions
;
2553 err
= pci_set_dma_mask(pdev
, DMA_BIT_MASK(32));
2555 dev_err(&pdev
->dev
, "no usable DMA configuration\n");
2556 goto err_release_regions
;
2562 * Enable bus mastering for the device ...
2564 pci_set_master(pdev
);
2567 * Allocate our adapter data structure and attach it to the device.
2569 adapter
= kzalloc(sizeof(*adapter
), GFP_KERNEL
);
2572 goto err_release_regions
;
2574 pci_set_drvdata(pdev
, adapter
);
2575 adapter
->pdev
= pdev
;
2576 adapter
->pdev_dev
= &pdev
->dev
;
2579 * Initialize SMP data synchronization resources.
2581 spin_lock_init(&adapter
->stats_lock
);
2584 * Map our I/O registers in BAR0.
2586 adapter
->regs
= pci_ioremap_bar(pdev
, 0);
2587 if (!adapter
->regs
) {
2588 dev_err(&pdev
->dev
, "cannot map device registers\n");
2590 goto err_free_adapter
;
2594 * Initialize adapter level features.
2596 adapter
->name
= pci_name(pdev
);
2597 adapter
->msg_enable
= dflt_msg_enable
;
2598 err
= adap_init0(adapter
);
2603 * Allocate our "adapter ports" and stitch everything together.
2605 pmask
= adapter
->params
.vfres
.pmask
;
2606 for_each_port(adapter
, pidx
) {
2610 * We simplistically allocate our virtual interfaces
2611 * sequentially across the port numbers to which we have
2612 * access rights. This should be configurable in some manner
2617 port_id
= ffs(pmask
) - 1;
2618 pmask
&= ~(1 << port_id
);
2619 viid
= t4vf_alloc_vi(adapter
, port_id
);
2621 dev_err(&pdev
->dev
, "cannot allocate VI for port %d:"
2622 " err=%d\n", port_id
, viid
);
2628 * Allocate our network device and stitch things together.
2630 netdev
= alloc_etherdev_mq(sizeof(struct port_info
),
2632 if (netdev
== NULL
) {
2633 t4vf_free_vi(adapter
, viid
);
2637 adapter
->port
[pidx
] = netdev
;
2638 SET_NETDEV_DEV(netdev
, &pdev
->dev
);
2639 pi
= netdev_priv(netdev
);
2640 pi
->adapter
= adapter
;
2642 pi
->port_id
= port_id
;
2646 * Initialize the starting state of our "port" and register
2649 pi
->xact_addr_filt
= -1;
2650 netif_carrier_off(netdev
);
2651 netdev
->irq
= pdev
->irq
;
2653 netdev
->hw_features
= NETIF_F_SG
| TSO_FLAGS
|
2654 NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
|
2655 NETIF_F_HW_VLAN_CTAG_RX
| NETIF_F_RXCSUM
;
2656 netdev
->vlan_features
= NETIF_F_SG
| TSO_FLAGS
|
2657 NETIF_F_IP_CSUM
| NETIF_F_IPV6_CSUM
|
2659 netdev
->features
= netdev
->hw_features
|
2660 NETIF_F_HW_VLAN_CTAG_TX
;
2662 netdev
->features
|= NETIF_F_HIGHDMA
;
2664 netdev
->priv_flags
|= IFF_UNICAST_FLT
;
2666 netdev
->netdev_ops
= &cxgb4vf_netdev_ops
;
2667 netdev
->ethtool_ops
= &cxgb4vf_ethtool_ops
;
2670 * Initialize the hardware/software state for the port.
2672 err
= t4vf_port_init(adapter
, pidx
);
2674 dev_err(&pdev
->dev
, "cannot initialize port %d\n",
2681 * The "card" is now ready to go. If any errors occur during device
2682 * registration we do not fail the whole "card" but rather proceed
2683 * only with the ports we manage to register successfully. However we
2684 * must register at least one net device.
2686 for_each_port(adapter
, pidx
) {
2687 netdev
= adapter
->port
[pidx
];
2691 err
= register_netdev(netdev
);
2693 dev_warn(&pdev
->dev
, "cannot register net device %s,"
2694 " skipping\n", netdev
->name
);
2698 set_bit(pidx
, &adapter
->registered_device_map
);
2700 if (adapter
->registered_device_map
== 0) {
2701 dev_err(&pdev
->dev
, "could not register any net devices\n");
2706 * Set up our debugfs entries.
2708 if (!IS_ERR_OR_NULL(cxgb4vf_debugfs_root
)) {
2709 adapter
->debugfs_root
=
2710 debugfs_create_dir(pci_name(pdev
),
2711 cxgb4vf_debugfs_root
);
2712 if (IS_ERR_OR_NULL(adapter
->debugfs_root
))
2713 dev_warn(&pdev
->dev
, "could not create debugfs"
2716 setup_debugfs(adapter
);
2720 * See what interrupts we'll be using. If we've been configured to
2721 * use MSI-X interrupts, try to enable them but fall back to using
2722 * MSI interrupts if we can't enable MSI-X interrupts. If we can't
2723 * get MSI interrupts we bail with the error.
2725 if (msi
== MSI_MSIX
&& enable_msix(adapter
) == 0)
2726 adapter
->flags
|= USING_MSIX
;
2728 err
= pci_enable_msi(pdev
);
2730 dev_err(&pdev
->dev
, "Unable to allocate %s interrupts;"
2732 msi
== MSI_MSIX
? "MSI-X or MSI" : "MSI", err
);
2733 goto err_free_debugfs
;
2735 adapter
->flags
|= USING_MSI
;
2739 * Now that we know how many "ports" we have and what their types are,
2740 * and how many Queue Sets we can support, we can configure our queue
2743 cfg_queues(adapter
);
2746 * Print a short notice on the existence and configuration of the new
2747 * VF network device ...
2749 for_each_port(adapter
, pidx
) {
2750 dev_info(adapter
->pdev_dev
, "%s: Chelsio VF NIC PCIe %s\n",
2751 adapter
->port
[pidx
]->name
,
2752 (adapter
->flags
& USING_MSIX
) ? "MSI-X" :
2753 (adapter
->flags
& USING_MSI
) ? "MSI" : "");
2762 * Error recovery and exit code. Unwind state that's been created
2763 * so far and return the error.
2767 if (!IS_ERR_OR_NULL(adapter
->debugfs_root
)) {
2768 cleanup_debugfs(adapter
);
2769 debugfs_remove_recursive(adapter
->debugfs_root
);
2773 for_each_port(adapter
, pidx
) {
2774 netdev
= adapter
->port
[pidx
];
2777 pi
= netdev_priv(netdev
);
2778 t4vf_free_vi(adapter
, pi
->viid
);
2779 if (test_bit(pidx
, &adapter
->registered_device_map
))
2780 unregister_netdev(netdev
);
2781 free_netdev(netdev
);
2785 iounmap(adapter
->regs
);
2790 err_release_regions
:
2791 pci_release_regions(pdev
);
2792 pci_clear_master(pdev
);
2795 pci_disable_device(pdev
);
2801 * "Remove" a device: tear down all kernel and driver state created in the
2802 * "probe" routine and quiesce the device (disable interrupts, etc.). (Note
2803 * that this is called "remove_one" in the PF Driver.)
2805 static void cxgb4vf_pci_remove(struct pci_dev
*pdev
)
2807 struct adapter
*adapter
= pci_get_drvdata(pdev
);
2810 * Tear down driver state associated with device.
2816 * Stop all of our activity. Unregister network port,
2817 * disable interrupts, etc.
2819 for_each_port(adapter
, pidx
)
2820 if (test_bit(pidx
, &adapter
->registered_device_map
))
2821 unregister_netdev(adapter
->port
[pidx
]);
2822 t4vf_sge_stop(adapter
);
2823 if (adapter
->flags
& USING_MSIX
) {
2824 pci_disable_msix(adapter
->pdev
);
2825 adapter
->flags
&= ~USING_MSIX
;
2826 } else if (adapter
->flags
& USING_MSI
) {
2827 pci_disable_msi(adapter
->pdev
);
2828 adapter
->flags
&= ~USING_MSI
;
2832 * Tear down our debugfs entries.
2834 if (!IS_ERR_OR_NULL(adapter
->debugfs_root
)) {
2835 cleanup_debugfs(adapter
);
2836 debugfs_remove_recursive(adapter
->debugfs_root
);
2840 * Free all of the various resources which we've acquired ...
2842 t4vf_free_sge_resources(adapter
);
2843 for_each_port(adapter
, pidx
) {
2844 struct net_device
*netdev
= adapter
->port
[pidx
];
2845 struct port_info
*pi
;
2850 pi
= netdev_priv(netdev
);
2851 t4vf_free_vi(adapter
, pi
->viid
);
2852 free_netdev(netdev
);
2854 iounmap(adapter
->regs
);
2859 * Disable the device and release its PCI resources.
2861 pci_disable_device(pdev
);
2862 pci_clear_master(pdev
);
2863 pci_release_regions(pdev
);
2867 * "Shutdown" quiesce the device, stopping Ingress Packet and Interrupt
2870 static void cxgb4vf_pci_shutdown(struct pci_dev
*pdev
)
2872 struct adapter
*adapter
;
2875 adapter
= pci_get_drvdata(pdev
);
2880 * Disable all Virtual Interfaces. This will shut down the
2881 * delivery of all ingress packets into the chip for these
2882 * Virtual Interfaces.
2884 for_each_port(adapter
, pidx
) {
2885 struct net_device
*netdev
;
2886 struct port_info
*pi
;
2888 if (!test_bit(pidx
, &adapter
->registered_device_map
))
2891 netdev
= adapter
->port
[pidx
];
2895 pi
= netdev_priv(netdev
);
2896 t4vf_enable_vi(adapter
, pi
->viid
, false, false);
2900 * Free up all Queues which will prevent further DMA and
2901 * Interrupts allowing various internal pathways to drain.
2903 t4vf_free_sge_resources(adapter
);
2907 * PCI Device registration data structures.
2909 #define CH_DEVICE(devid, idx) \
2910 { PCI_VENDOR_ID_CHELSIO, devid, PCI_ANY_ID, PCI_ANY_ID, 0, 0, idx }
2912 static DEFINE_PCI_DEVICE_TABLE(cxgb4vf_pci_tbl
) = {
2913 CH_DEVICE(0xb000, 0), /* PE10K FPGA */
2914 CH_DEVICE(0x4800, 0), /* T440-dbg */
2915 CH_DEVICE(0x4801, 0), /* T420-cr */
2916 CH_DEVICE(0x4802, 0), /* T422-cr */
2917 CH_DEVICE(0x4803, 0), /* T440-cr */
2918 CH_DEVICE(0x4804, 0), /* T420-bch */
2919 CH_DEVICE(0x4805, 0), /* T440-bch */
2920 CH_DEVICE(0x4806, 0), /* T460-ch */
2921 CH_DEVICE(0x4807, 0), /* T420-so */
2922 CH_DEVICE(0x4808, 0), /* T420-cx */
2923 CH_DEVICE(0x4809, 0), /* T420-bt */
2924 CH_DEVICE(0x480a, 0), /* T404-bt */
2925 CH_DEVICE(0x480d, 0), /* T480-cr */
2926 CH_DEVICE(0x480e, 0), /* T440-lp-cr */
2927 CH_DEVICE(0x5800, 0), /* T580-dbg */
2928 CH_DEVICE(0x5801, 0), /* T520-cr */
2929 CH_DEVICE(0x5802, 0), /* T522-cr */
2930 CH_DEVICE(0x5803, 0), /* T540-cr */
2931 CH_DEVICE(0x5804, 0), /* T520-bch */
2932 CH_DEVICE(0x5805, 0), /* T540-bch */
2933 CH_DEVICE(0x5806, 0), /* T540-ch */
2934 CH_DEVICE(0x5807, 0), /* T520-so */
2935 CH_DEVICE(0x5808, 0), /* T520-cx */
2936 CH_DEVICE(0x5809, 0), /* T520-bt */
2937 CH_DEVICE(0x580a, 0), /* T504-bt */
2938 CH_DEVICE(0x580b, 0), /* T520-sr */
2939 CH_DEVICE(0x580c, 0), /* T504-bt */
2940 CH_DEVICE(0x580d, 0), /* T580-cr */
2941 CH_DEVICE(0x580e, 0), /* T540-lp-cr */
2942 CH_DEVICE(0x580f, 0), /* Amsterdam */
2943 CH_DEVICE(0x5810, 0), /* T580-lp-cr */
2944 CH_DEVICE(0x5811, 0), /* T520-lp-cr */
2945 CH_DEVICE(0x5812, 0), /* T560-cr */
2946 CH_DEVICE(0x5813, 0), /* T580-cr */
2947 CH_DEVICE(0x5814, 0), /* T580-so-cr */
2948 CH_DEVICE(0x5815, 0), /* T502-bt */
2949 CH_DEVICE(0x5880, 0),
2950 CH_DEVICE(0x5881, 0),
2951 CH_DEVICE(0x5882, 0),
2952 CH_DEVICE(0x5883, 0),
2953 CH_DEVICE(0x5884, 0),
2954 CH_DEVICE(0x5885, 0),
2958 MODULE_DESCRIPTION(DRV_DESC
);
2959 MODULE_AUTHOR("Chelsio Communications");
2960 MODULE_LICENSE("Dual BSD/GPL");
2961 MODULE_VERSION(DRV_VERSION
);
2962 MODULE_DEVICE_TABLE(pci
, cxgb4vf_pci_tbl
);
2964 static struct pci_driver cxgb4vf_driver
= {
2965 .name
= KBUILD_MODNAME
,
2966 .id_table
= cxgb4vf_pci_tbl
,
2967 .probe
= cxgb4vf_pci_probe
,
2968 .remove
= cxgb4vf_pci_remove
,
2969 .shutdown
= cxgb4vf_pci_shutdown
,
2973 * Initialize global driver state.
2975 static int __init
cxgb4vf_module_init(void)
2980 * Vet our module parameters.
2982 if (msi
!= MSI_MSIX
&& msi
!= MSI_MSI
) {
2983 pr_warn("bad module parameter msi=%d; must be %d (MSI-X or MSI) or %d (MSI)\n",
2984 msi
, MSI_MSIX
, MSI_MSI
);
2988 /* Debugfs support is optional, just warn if this fails */
2989 cxgb4vf_debugfs_root
= debugfs_create_dir(KBUILD_MODNAME
, NULL
);
2990 if (IS_ERR_OR_NULL(cxgb4vf_debugfs_root
))
2991 pr_warn("could not create debugfs entry, continuing\n");
2993 ret
= pci_register_driver(&cxgb4vf_driver
);
2994 if (ret
< 0 && !IS_ERR_OR_NULL(cxgb4vf_debugfs_root
))
2995 debugfs_remove(cxgb4vf_debugfs_root
);
3000 * Tear down global driver state.
3002 static void __exit
cxgb4vf_module_exit(void)
3004 pci_unregister_driver(&cxgb4vf_driver
);
3005 debugfs_remove(cxgb4vf_debugfs_root
);
3008 module_init(cxgb4vf_module_init
);
3009 module_exit(cxgb4vf_module_exit
);