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30e3f2b4ea
freebsd-dev/sys/dev/cxgbe/t4_sge.c
Navdeep Parhar 30e3f2b4ea cxgbe(4): let the PF driver use VM work requests for transmit. 
This allows the PF interfaces to communicate with the VF interfaces over
the internal switch in the ASIC.  Fix the GL limits for VM work requests
while here.

MFC after:	3 days
Sponsored by:	Chelsio Communications
2020-09-22 04:16:40 +00:00

6633 lines
173 KiB
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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2011 Chelsio Communications, Inc.
* All rights reserved.
* Written by: Navdeep Parhar <np@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_kern_tls.h"
#include "opt_ratelimit.h"
#include <sys/types.h>
#include <sys/eventhandler.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/kernel.h>
#include <sys/ktls.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/sbuf.h>
#include <sys/taskqueue.h>
#include <sys/time.h>
#include <sys/sglist.h>
#include <sys/sysctl.h>
#include <sys/smp.h>
#include <sys/socketvar.h>
#include <sys/counter.h>
#include <net/bpf.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_vlan_var.h>
#include <net/if_vxlan.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <machine/in_cksum.h>
#include <machine/md_var.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#ifdef DEV_NETMAP
#include <machine/bus.h>
#include <sys/selinfo.h>
#include <net/if_var.h>
#include <net/netmap.h>
#include <dev/netmap/netmap_kern.h>
#endif
#include "common/common.h"
#include "common/t4_regs.h"
#include "common/t4_regs_values.h"
#include "common/t4_msg.h"
#include "t4_l2t.h"
#include "t4_mp_ring.h"
#ifdef T4_PKT_TIMESTAMP
#define RX_COPY_THRESHOLD (MINCLSIZE - 8)
#else
#define RX_COPY_THRESHOLD MINCLSIZE
#endif
/* Internal mbuf flags stored in PH_loc.eight[1]. */
#define MC_NOMAP 0x01
#define MC_RAW_WR 0x02
#define MC_TLS 0x04
/*
* Ethernet frames are DMA'd at this byte offset into the freelist buffer.
* 0-7 are valid values.
*/
static int fl_pktshift = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, fl_pktshift, CTLFLAG_RDTUN, &fl_pktshift, 0,
"payload DMA offset in rx buffer (bytes)");
/*
* Pad ethernet payload up to this boundary.
* -1: driver should figure out a good value.
* 0: disable padding.
* Any power of 2 from 32 to 4096 (both inclusive) is also a valid value.
*/
int fl_pad = -1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, fl_pad, CTLFLAG_RDTUN, &fl_pad, 0,
"payload pad boundary (bytes)");
/*
* Status page length.
* -1: driver should figure out a good value.
* 64 or 128 are the only other valid values.
*/
static int spg_len = -1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, spg_len, CTLFLAG_RDTUN, &spg_len, 0,
"status page size (bytes)");
/*
* Congestion drops.
* -1: no congestion feedback (not recommended).
* 0: backpressure the channel instead of dropping packets right away.
* 1: no backpressure, drop packets for the congested queue immediately.
*/
static int cong_drop = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, cong_drop, CTLFLAG_RDTUN, &cong_drop, 0,
"Congestion control for RX queues (0 = backpressure, 1 = drop");
/*
* Deliver multiple frames in the same free list buffer if they fit.
* -1: let the driver decide whether to enable buffer packing or not.
* 0: disable buffer packing.
* 1: enable buffer packing.
*/
static int buffer_packing = -1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, buffer_packing, CTLFLAG_RDTUN, &buffer_packing,
0, "Enable buffer packing");
/*
* Start next frame in a packed buffer at this boundary.
* -1: driver should figure out a good value.
* T4: driver will ignore this and use the same value as fl_pad above.
* T5: 16, or a power of 2 from 64 to 4096 (both inclusive) is a valid value.
*/
static int fl_pack = -1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, fl_pack, CTLFLAG_RDTUN, &fl_pack, 0,
"payload pack boundary (bytes)");
/*
* Largest rx cluster size that the driver is allowed to allocate.
*/
static int largest_rx_cluster = MJUM16BYTES;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, largest_rx_cluster, CTLFLAG_RDTUN,
&largest_rx_cluster, 0, "Largest rx cluster (bytes)");
/*
* Size of cluster allocation that's most likely to succeed. The driver will
* fall back to this size if it fails to allocate clusters larger than this.
*/
static int safest_rx_cluster = PAGE_SIZE;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, safest_rx_cluster, CTLFLAG_RDTUN,
&safest_rx_cluster, 0, "Safe rx cluster (bytes)");
#ifdef RATELIMIT
/*
* Knob to control TCP timestamp rewriting, and the granularity of the tick used
* for rewriting. -1 and 0-3 are all valid values.
* -1: hardware should leave the TCP timestamps alone.
* 0: 1ms
* 1: 100us
* 2: 10us
* 3: 1us
*/
static int tsclk = -1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, tsclk, CTLFLAG_RDTUN, &tsclk, 0,
"Control TCP timestamp rewriting when using pacing");
static int eo_max_backlog = 1024 * 1024;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, eo_max_backlog, CTLFLAG_RDTUN, &eo_max_backlog,
0, "Maximum backlog of ratelimited data per flow");
#endif
/*
* The interrupt holdoff timers are multiplied by this value on T6+.
* 1 and 3-17 (both inclusive) are legal values.
*/
static int tscale = 1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, tscale, CTLFLAG_RDTUN, &tscale, 0,
"Interrupt holdoff timer scale on T6+");
/*
* Number of LRO entries in the lro_ctrl structure per rx queue.
*/
static int lro_entries = TCP_LRO_ENTRIES;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, lro_entries, CTLFLAG_RDTUN, &lro_entries, 0,
"Number of LRO entries per RX queue");
/*
* This enables presorting of frames before they're fed into tcp_lro_rx.
*/
static int lro_mbufs = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, lro_mbufs, CTLFLAG_RDTUN, &lro_mbufs, 0,
"Enable presorting of LRO frames");
static counter_u64_t pullups;
SYSCTL_COUNTER_U64(_hw_cxgbe, OID_AUTO, pullups, CTLFLAG_RD, &pullups,
"Number of mbuf pullups performed");
static counter_u64_t defrags;
SYSCTL_COUNTER_U64(_hw_cxgbe, OID_AUTO, defrags, CTLFLAG_RD, &defrags,
"Number of mbuf defrags performed");
static int service_iq(struct sge_iq *, int);
static int service_iq_fl(struct sge_iq *, int);
static struct mbuf *get_fl_payload(struct adapter *, struct sge_fl *, uint32_t);
static int eth_rx(struct adapter *, struct sge_rxq *, const struct iq_desc *,
u_int);
static inline void init_iq(struct sge_iq *, struct adapter *, int, int, int);
static inline void init_fl(struct adapter *, struct sge_fl *, int, int, char *);
static inline void init_eq(struct adapter *, struct sge_eq *, int, int, uint8_t,
uint16_t, char *);
static int alloc_ring(struct adapter *, size_t, bus_dma_tag_t *, bus_dmamap_t *,
bus_addr_t *, void **);
static int free_ring(struct adapter *, bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
void *);
static int alloc_iq_fl(struct vi_info *, struct sge_iq *, struct sge_fl *,
int, int);
static int free_iq_fl(struct vi_info *, struct sge_iq *, struct sge_fl *);
static void add_iq_sysctls(struct sysctl_ctx_list *, struct sysctl_oid *,
struct sge_iq *);
static void add_fl_sysctls(struct adapter *, struct sysctl_ctx_list *,
struct sysctl_oid *, struct sge_fl *);
static int alloc_fwq(struct adapter *);
static int free_fwq(struct adapter *);
static int alloc_ctrlq(struct adapter *, struct sge_wrq *, int,
struct sysctl_oid *);
static int alloc_rxq(struct vi_info *, struct sge_rxq *, int, int,
struct sysctl_oid *);
static int free_rxq(struct vi_info *, struct sge_rxq *);
#ifdef TCP_OFFLOAD
static int alloc_ofld_rxq(struct vi_info *, struct sge_ofld_rxq *, int, int,
struct sysctl_oid *);
static int free_ofld_rxq(struct vi_info *, struct sge_ofld_rxq *);
#endif
#ifdef DEV_NETMAP
static int alloc_nm_rxq(struct vi_info *, struct sge_nm_rxq *, int, int,
struct sysctl_oid *);
static int free_nm_rxq(struct vi_info *, struct sge_nm_rxq *);
static int alloc_nm_txq(struct vi_info *, struct sge_nm_txq *, int, int,
struct sysctl_oid *);
static int free_nm_txq(struct vi_info *, struct sge_nm_txq *);
#endif
static int ctrl_eq_alloc(struct adapter *, struct sge_eq *);
static int eth_eq_alloc(struct adapter *, struct vi_info *, struct sge_eq *);
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
static int ofld_eq_alloc(struct adapter *, struct vi_info *, struct sge_eq *);
#endif
static int alloc_eq(struct adapter *, struct vi_info *, struct sge_eq *);
static int free_eq(struct adapter *, struct sge_eq *);
static int alloc_wrq(struct adapter *, struct vi_info *, struct sge_wrq *,
struct sysctl_oid *);
static int free_wrq(struct adapter *, struct sge_wrq *);
static int alloc_txq(struct vi_info *, struct sge_txq *, int,
struct sysctl_oid *);
static int free_txq(struct vi_info *, struct sge_txq *);
static void oneseg_dma_callback(void *, bus_dma_segment_t *, int, int);
static inline void ring_fl_db(struct adapter *, struct sge_fl *);
static int refill_fl(struct adapter *, struct sge_fl *, int);
static void refill_sfl(void *);
static int alloc_fl_sdesc(struct sge_fl *);
static void free_fl_sdesc(struct adapter *, struct sge_fl *);
static int find_refill_source(struct adapter *, int, bool);
static void add_fl_to_sfl(struct adapter *, struct sge_fl *);
static inline void get_pkt_gl(struct mbuf *, struct sglist *);
static inline u_int txpkt_len16(u_int, const u_int);
static inline u_int txpkt_vm_len16(u_int, const u_int);
static inline void calculate_mbuf_len16(struct mbuf *, bool);
static inline u_int txpkts0_len16(u_int);
static inline u_int txpkts1_len16(void);
static u_int write_raw_wr(struct sge_txq *, void *, struct mbuf *, u_int);
static u_int write_txpkt_wr(struct adapter *, struct sge_txq *, struct mbuf *,
u_int);
static u_int write_txpkt_vm_wr(struct adapter *, struct sge_txq *,
struct mbuf *);
static int add_to_txpkts_vf(struct adapter *, struct sge_txq *, struct mbuf *,
int, bool *);
static int add_to_txpkts_pf(struct adapter *, struct sge_txq *, struct mbuf *,
int, bool *);
static u_int write_txpkts_wr(struct adapter *, struct sge_txq *);
static u_int write_txpkts_vm_wr(struct adapter *, struct sge_txq *);
static void write_gl_to_txd(struct sge_txq *, struct mbuf *, caddr_t *, int);
static inline void copy_to_txd(struct sge_eq *, caddr_t, caddr_t *, int);
static inline void ring_eq_db(struct adapter *, struct sge_eq *, u_int);
static inline uint16_t read_hw_cidx(struct sge_eq *);
static inline u_int reclaimable_tx_desc(struct sge_eq *);
static inline u_int total_available_tx_desc(struct sge_eq *);
static u_int reclaim_tx_descs(struct sge_txq *, u_int);
static void tx_reclaim(void *, int);
static __be64 get_flit(struct sglist_seg *, int, int);
static int handle_sge_egr_update(struct sge_iq *, const struct rss_header *,
struct mbuf *);
static int handle_fw_msg(struct sge_iq *, const struct rss_header *,
struct mbuf *);
static int t4_handle_wrerr_rpl(struct adapter *, const __be64 *);
static void wrq_tx_drain(void *, int);
static void drain_wrq_wr_list(struct adapter *, struct sge_wrq *);
static int sysctl_uint16(SYSCTL_HANDLER_ARGS);
static int sysctl_bufsizes(SYSCTL_HANDLER_ARGS);
#ifdef RATELIMIT
static inline u_int txpkt_eo_len16(u_int, u_int, u_int);
static int ethofld_fw4_ack(struct sge_iq *, const struct rss_header *,
struct mbuf *);
#endif
static counter_u64_t extfree_refs;
static counter_u64_t extfree_rels;
an_handler_t t4_an_handler;
fw_msg_handler_t t4_fw_msg_handler[NUM_FW6_TYPES];
cpl_handler_t t4_cpl_handler[NUM_CPL_CMDS];
cpl_handler_t set_tcb_rpl_handlers[NUM_CPL_COOKIES];
cpl_handler_t l2t_write_rpl_handlers[NUM_CPL_COOKIES];
cpl_handler_t act_open_rpl_handlers[NUM_CPL_COOKIES];
cpl_handler_t abort_rpl_rss_handlers[NUM_CPL_COOKIES];
cpl_handler_t fw4_ack_handlers[NUM_CPL_COOKIES];
void
t4_register_an_handler(an_handler_t h)
{
uintptr_t *loc;
MPASS(h == NULL || t4_an_handler == NULL);
loc = (uintptr_t *)&t4_an_handler;
atomic_store_rel_ptr(loc, (uintptr_t)h);
}
void
t4_register_fw_msg_handler(int type, fw_msg_handler_t h)
{
uintptr_t *loc;
MPASS(type < nitems(t4_fw_msg_handler));
MPASS(h == NULL || t4_fw_msg_handler[type] == NULL);
/*
* These are dispatched by the handler for FW{4|6}_CPL_MSG using the CPL
* handler dispatch table. Reject any attempt to install a handler for
* this subtype.
*/
MPASS(type != FW_TYPE_RSSCPL);
MPASS(type != FW6_TYPE_RSSCPL);
loc = (uintptr_t *)&t4_fw_msg_handler[type];
atomic_store_rel_ptr(loc, (uintptr_t)h);
}
void
t4_register_cpl_handler(int opcode, cpl_handler_t h)
{
uintptr_t *loc;
MPASS(opcode < nitems(t4_cpl_handler));
MPASS(h == NULL || t4_cpl_handler[opcode] == NULL);
loc = (uintptr_t *)&t4_cpl_handler[opcode];
atomic_store_rel_ptr(loc, (uintptr_t)h);
}
static int
set_tcb_rpl_handler(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
const struct cpl_set_tcb_rpl *cpl = (const void *)(rss + 1);
u_int tid;
int cookie;
MPASS(m == NULL);
tid = GET_TID(cpl);
if (is_hpftid(iq->adapter, tid) || is_ftid(iq->adapter, tid)) {
/*
* The return code for filter-write is put in the CPL cookie so
* we have to rely on the hardware tid (is_ftid) to determine
* that this is a response to a filter.
*/
cookie = CPL_COOKIE_FILTER;
} else {
cookie = G_COOKIE(cpl->cookie);
}
MPASS(cookie > CPL_COOKIE_RESERVED);
MPASS(cookie < nitems(set_tcb_rpl_handlers));
return (set_tcb_rpl_handlers[cookie](iq, rss, m));
}
static int
l2t_write_rpl_handler(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
const struct cpl_l2t_write_rpl *rpl = (const void *)(rss + 1);
unsigned int cookie;
MPASS(m == NULL);
cookie = GET_TID(rpl) & F_SYNC_WR ? CPL_COOKIE_TOM : CPL_COOKIE_FILTER;
return (l2t_write_rpl_handlers[cookie](iq, rss, m));
}
static int
act_open_rpl_handler(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
const struct cpl_act_open_rpl *cpl = (const void *)(rss + 1);
u_int cookie = G_TID_COOKIE(G_AOPEN_ATID(be32toh(cpl->atid_status)));
MPASS(m == NULL);
MPASS(cookie != CPL_COOKIE_RESERVED);
return (act_open_rpl_handlers[cookie](iq, rss, m));
}
static int
abort_rpl_rss_handler(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
struct adapter *sc = iq->adapter;
u_int cookie;
MPASS(m == NULL);
if (is_hashfilter(sc))
cookie = CPL_COOKIE_HASHFILTER;
else
cookie = CPL_COOKIE_TOM;
return (abort_rpl_rss_handlers[cookie](iq, rss, m));
}
static int
fw4_ack_handler(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m)
{
struct adapter *sc = iq->adapter;
const struct cpl_fw4_ack *cpl = (const void *)(rss + 1);
unsigned int tid = G_CPL_FW4_ACK_FLOWID(be32toh(OPCODE_TID(cpl)));
u_int cookie;
MPASS(m == NULL);
if (is_etid(sc, tid))
cookie = CPL_COOKIE_ETHOFLD;
else
cookie = CPL_COOKIE_TOM;
return (fw4_ack_handlers[cookie](iq, rss, m));
}
static void
t4_init_shared_cpl_handlers(void)
{
t4_register_cpl_handler(CPL_SET_TCB_RPL, set_tcb_rpl_handler);
t4_register_cpl_handler(CPL_L2T_WRITE_RPL, l2t_write_rpl_handler);
t4_register_cpl_handler(CPL_ACT_OPEN_RPL, act_open_rpl_handler);
t4_register_cpl_handler(CPL_ABORT_RPL_RSS, abort_rpl_rss_handler);
t4_register_cpl_handler(CPL_FW4_ACK, fw4_ack_handler);
}
void
t4_register_shared_cpl_handler(int opcode, cpl_handler_t h, int cookie)
{
uintptr_t *loc;
MPASS(opcode < nitems(t4_cpl_handler));
MPASS(cookie > CPL_COOKIE_RESERVED);
MPASS(cookie < NUM_CPL_COOKIES);
MPASS(t4_cpl_handler[opcode] != NULL);
switch (opcode) {
case CPL_SET_TCB_RPL:
loc = (uintptr_t *)&set_tcb_rpl_handlers[cookie];
break;
case CPL_L2T_WRITE_RPL:
loc = (uintptr_t *)&l2t_write_rpl_handlers[cookie];
break;
case CPL_ACT_OPEN_RPL:
loc = (uintptr_t *)&act_open_rpl_handlers[cookie];
break;
case CPL_ABORT_RPL_RSS:
loc = (uintptr_t *)&abort_rpl_rss_handlers[cookie];
break;
case CPL_FW4_ACK:
loc = (uintptr_t *)&fw4_ack_handlers[cookie];
break;
default:
MPASS(0);
return;
}
MPASS(h == NULL || *loc == (uintptr_t)NULL);
atomic_store_rel_ptr(loc, (uintptr_t)h);
}
/*
* Called on MOD_LOAD. Validates and calculates the SGE tunables.
*/
void
t4_sge_modload(void)
{
if (fl_pktshift < 0 || fl_pktshift > 7) {
printf("Invalid hw.cxgbe.fl_pktshift value (%d),"
" using 0 instead.\n", fl_pktshift);
fl_pktshift = 0;
}
if (spg_len != 64 && spg_len != 128) {
int len;
#if defined(__i386__) || defined(__amd64__)
len = cpu_clflush_line_size > 64 ? 128 : 64;
#else
len = 64;
#endif
if (spg_len != -1) {
printf("Invalid hw.cxgbe.spg_len value (%d),"
" using %d instead.\n", spg_len, len);
}
spg_len = len;
}
if (cong_drop < -1 || cong_drop > 1) {
printf("Invalid hw.cxgbe.cong_drop value (%d),"
" using 0 instead.\n", cong_drop);
cong_drop = 0;
}
if (tscale != 1 && (tscale < 3 || tscale > 17)) {
printf("Invalid hw.cxgbe.tscale value (%d),"
" using 1 instead.\n", tscale);
tscale = 1;
}
extfree_refs = counter_u64_alloc(M_WAITOK);
extfree_rels = counter_u64_alloc(M_WAITOK);
pullups = counter_u64_alloc(M_WAITOK);
defrags = counter_u64_alloc(M_WAITOK);
counter_u64_zero(extfree_refs);
counter_u64_zero(extfree_rels);
counter_u64_zero(pullups);
counter_u64_zero(defrags);
t4_init_shared_cpl_handlers();
t4_register_cpl_handler(CPL_FW4_MSG, handle_fw_msg);
t4_register_cpl_handler(CPL_FW6_MSG, handle_fw_msg);
t4_register_cpl_handler(CPL_SGE_EGR_UPDATE, handle_sge_egr_update);
#ifdef RATELIMIT
t4_register_shared_cpl_handler(CPL_FW4_ACK, ethofld_fw4_ack,
CPL_COOKIE_ETHOFLD);
#endif
t4_register_fw_msg_handler(FW6_TYPE_CMD_RPL, t4_handle_fw_rpl);
t4_register_fw_msg_handler(FW6_TYPE_WRERR_RPL, t4_handle_wrerr_rpl);
}
void
t4_sge_modunload(void)
{
counter_u64_free(extfree_refs);
counter_u64_free(extfree_rels);
counter_u64_free(pullups);
counter_u64_free(defrags);
}
uint64_t
t4_sge_extfree_refs(void)
{
uint64_t refs, rels;
rels = counter_u64_fetch(extfree_rels);
refs = counter_u64_fetch(extfree_refs);
return (refs - rels);
}
/* max 4096 */
#define MAX_PACK_BOUNDARY 512
static inline void
setup_pad_and_pack_boundaries(struct adapter *sc)
{
uint32_t v, m;
int pad, pack, pad_shift;
pad_shift = chip_id(sc) > CHELSIO_T5 ? X_T6_INGPADBOUNDARY_SHIFT :
X_INGPADBOUNDARY_SHIFT;
pad = fl_pad;
if (fl_pad < (1 << pad_shift) ||
fl_pad > (1 << (pad_shift + M_INGPADBOUNDARY)) ||
!powerof2(fl_pad)) {
/*
* If there is any chance that we might use buffer packing and
* the chip is a T4, then pick 64 as the pad/pack boundary. Set
* it to the minimum allowed in all other cases.
*/
pad = is_t4(sc) && buffer_packing ? 64 : 1 << pad_shift;
/*
* For fl_pad = 0 we'll still write a reasonable value to the
* register but all the freelists will opt out of padding.
* We'll complain here only if the user tried to set it to a
* value greater than 0 that was invalid.
*/
if (fl_pad > 0) {
device_printf(sc->dev, "Invalid hw.cxgbe.fl_pad value"
" (%d), using %d instead.\n", fl_pad, pad);
}
}
m = V_INGPADBOUNDARY(M_INGPADBOUNDARY);
v = V_INGPADBOUNDARY(ilog2(pad) - pad_shift);
t4_set_reg_field(sc, A_SGE_CONTROL, m, v);
if (is_t4(sc)) {
if (fl_pack != -1 && fl_pack != pad) {
/* Complain but carry on. */
device_printf(sc->dev, "hw.cxgbe.fl_pack (%d) ignored,"
" using %d instead.\n", fl_pack, pad);
}
return;
}
pack = fl_pack;
if (fl_pack < 16 || fl_pack == 32 || fl_pack > 4096 ||
!powerof2(fl_pack)) {
if (sc->params.pci.mps > MAX_PACK_BOUNDARY)
pack = MAX_PACK_BOUNDARY;
else
pack = max(sc->params.pci.mps, CACHE_LINE_SIZE);
MPASS(powerof2(pack));
if (pack < 16)
pack = 16;
if (pack == 32)
pack = 64;
if (pack > 4096)
pack = 4096;
if (fl_pack != -1) {
device_printf(sc->dev, "Invalid hw.cxgbe.fl_pack value"
" (%d), using %d instead.\n", fl_pack, pack);
}
}
m = V_INGPACKBOUNDARY(M_INGPACKBOUNDARY);
if (pack == 16)
v = V_INGPACKBOUNDARY(0);
else
v = V_INGPACKBOUNDARY(ilog2(pack) - 5);
MPASS(!is_t4(sc)); /* T4 doesn't have SGE_CONTROL2 */
t4_set_reg_field(sc, A_SGE_CONTROL2, m, v);
}
/*
* adap->params.vpd.cclk must be set up before this is called.
*/
void
t4_tweak_chip_settings(struct adapter *sc)
{
int i, reg;
uint32_t v, m;
int intr_timer[SGE_NTIMERS] = {1, 5, 10, 50, 100, 200};
int timer_max = M_TIMERVALUE0 * 1000 / sc->params.vpd.cclk;
int intr_pktcount[SGE_NCOUNTERS] = {1, 8, 16, 32}; /* 63 max */
uint16_t indsz = min(RX_COPY_THRESHOLD - 1, M_INDICATESIZE);
static int sw_buf_sizes[] = {
MCLBYTES,
#if MJUMPAGESIZE != MCLBYTES
MJUMPAGESIZE,
#endif
MJUM9BYTES,
MJUM16BYTES
};
KASSERT(sc->flags & MASTER_PF,
("%s: trying to change chip settings when not master.", __func__));
m = V_PKTSHIFT(M_PKTSHIFT) | F_RXPKTCPLMODE | F_EGRSTATUSPAGESIZE;
v = V_PKTSHIFT(fl_pktshift) | F_RXPKTCPLMODE |
V_EGRSTATUSPAGESIZE(spg_len == 128);
t4_set_reg_field(sc, A_SGE_CONTROL, m, v);
setup_pad_and_pack_boundaries(sc);
v = V_HOSTPAGESIZEPF0(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF1(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF2(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF3(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF4(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF5(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF6(PAGE_SHIFT - 10) |
V_HOSTPAGESIZEPF7(PAGE_SHIFT - 10);
t4_write_reg(sc, A_SGE_HOST_PAGE_SIZE, v);
t4_write_reg(sc, A_SGE_FL_BUFFER_SIZE0, 4096);
t4_write_reg(sc, A_SGE_FL_BUFFER_SIZE1, 65536);
reg = A_SGE_FL_BUFFER_SIZE2;
for (i = 0; i < nitems(sw_buf_sizes); i++) {
MPASS(reg <= A_SGE_FL_BUFFER_SIZE15);
t4_write_reg(sc, reg, sw_buf_sizes[i]);
reg += 4;
MPASS(reg <= A_SGE_FL_BUFFER_SIZE15);
t4_write_reg(sc, reg, sw_buf_sizes[i] - CL_METADATA_SIZE);
reg += 4;
}
v = V_THRESHOLD_0(intr_pktcount[0]) | V_THRESHOLD_1(intr_pktcount[1]) |
V_THRESHOLD_2(intr_pktcount[2]) | V_THRESHOLD_3(intr_pktcount[3]);
t4_write_reg(sc, A_SGE_INGRESS_RX_THRESHOLD, v);
KASSERT(intr_timer[0] <= timer_max,
("%s: not a single usable timer (%d, %d)", __func__, intr_timer[0],
timer_max));
for (i = 1; i < nitems(intr_timer); i++) {
KASSERT(intr_timer[i] >= intr_timer[i - 1],
("%s: timers not listed in increasing order (%d)",
__func__, i));
while (intr_timer[i] > timer_max) {
if (i == nitems(intr_timer) - 1) {
intr_timer[i] = timer_max;
break;
}
intr_timer[i] += intr_timer[i - 1];
intr_timer[i] /= 2;
}
}
v = V_TIMERVALUE0(us_to_core_ticks(sc, intr_timer[0])) |
V_TIMERVALUE1(us_to_core_ticks(sc, intr_timer[1]));
t4_write_reg(sc, A_SGE_TIMER_VALUE_0_AND_1, v);
v = V_TIMERVALUE2(us_to_core_ticks(sc, intr_timer[2])) |
V_TIMERVALUE3(us_to_core_ticks(sc, intr_timer[3]));
t4_write_reg(sc, A_SGE_TIMER_VALUE_2_AND_3, v);
v = V_TIMERVALUE4(us_to_core_ticks(sc, intr_timer[4])) |
V_TIMERVALUE5(us_to_core_ticks(sc, intr_timer[5]));
t4_write_reg(sc, A_SGE_TIMER_VALUE_4_AND_5, v);
if (chip_id(sc) >= CHELSIO_T6) {
m = V_TSCALE(M_TSCALE);
if (tscale == 1)
v = 0;
else
v = V_TSCALE(tscale - 2);
t4_set_reg_field(sc, A_SGE_ITP_CONTROL, m, v);
if (sc->debug_flags & DF_DISABLE_TCB_CACHE) {
m = V_RDTHRESHOLD(M_RDTHRESHOLD) | F_WRTHRTHRESHEN |
V_WRTHRTHRESH(M_WRTHRTHRESH);
t4_tp_pio_read(sc, &v, 1, A_TP_CMM_CONFIG, 1);
v &= ~m;
v |= V_RDTHRESHOLD(1) | F_WRTHRTHRESHEN |
V_WRTHRTHRESH(16);
t4_tp_pio_write(sc, &v, 1, A_TP_CMM_CONFIG, 1);
}
}
/* 4K, 16K, 64K, 256K DDP "page sizes" for TDDP */
v = V_HPZ0(0) | V_HPZ1(2) | V_HPZ2(4) | V_HPZ3(6);
t4_write_reg(sc, A_ULP_RX_TDDP_PSZ, v);
/*
* 4K, 8K, 16K, 64K DDP "page sizes" for iSCSI DDP. These have been
* chosen with MAXPHYS = 128K in mind. The largest DDP buffer that we
* may have to deal with is MAXPHYS + 1 page.
*/
v = V_HPZ0(0) | V_HPZ1(1) | V_HPZ2(2) | V_HPZ3(4);
t4_write_reg(sc, A_ULP_RX_ISCSI_PSZ, v);
/* We use multiple DDP page sizes both in plain-TOE and ISCSI modes. */
m = v = F_TDDPTAGTCB | F_ISCSITAGTCB;
t4_set_reg_field(sc, A_ULP_RX_CTL, m, v);
m = V_INDICATESIZE(M_INDICATESIZE) | F_REARMDDPOFFSET |
F_RESETDDPOFFSET;
v = V_INDICATESIZE(indsz) | F_REARMDDPOFFSET | F_RESETDDPOFFSET;
t4_set_reg_field(sc, A_TP_PARA_REG5, m, v);
}
/*
* SGE wants the buffer to be at least 64B and then a multiple of 16. Its
* address mut be 16B aligned. If padding is in use the buffer's start and end
* need to be aligned to the pad boundary as well. We'll just make sure that
* the size is a multiple of the pad boundary here, it is up to the buffer
* allocation code to make sure the start of the buffer is aligned.
*/
static inline int
hwsz_ok(struct adapter *sc, int hwsz)
{
int mask = fl_pad ? sc->params.sge.pad_boundary - 1 : 16 - 1;
return (hwsz >= 64 && (hwsz & mask) == 0);
}
/*
* XXX: driver really should be able to deal with unexpected settings.
*/
int
t4_read_chip_settings(struct adapter *sc)
{
struct sge *s = &sc->sge;
struct sge_params *sp = &sc->params.sge;
int i, j, n, rc = 0;
uint32_t m, v, r;
uint16_t indsz = min(RX_COPY_THRESHOLD - 1, M_INDICATESIZE);
static int sw_buf_sizes[] = { /* Sorted by size */
MCLBYTES,
#if MJUMPAGESIZE != MCLBYTES
MJUMPAGESIZE,
#endif
MJUM9BYTES,
MJUM16BYTES
};
struct rx_buf_info *rxb;
m = F_RXPKTCPLMODE;
v = F_RXPKTCPLMODE;
r = sc->params.sge.sge_control;
if ((r & m) != v) {
device_printf(sc->dev, "invalid SGE_CONTROL(0x%x)\n", r);
rc = EINVAL;
}
/*
* If this changes then every single use of PAGE_SHIFT in the driver
* needs to be carefully reviewed for PAGE_SHIFT vs sp->page_shift.
*/
if (sp->page_shift != PAGE_SHIFT) {
device_printf(sc->dev, "invalid SGE_HOST_PAGE_SIZE(0x%x)\n", r);
rc = EINVAL;
}
s->safe_zidx = -1;
rxb = &s->rx_buf_info[0];
for (i = 0; i < SW_ZONE_SIZES; i++, rxb++) {
rxb->size1 = sw_buf_sizes[i];
rxb->zone = m_getzone(rxb->size1);
rxb->type = m_gettype(rxb->size1);
rxb->size2 = 0;
rxb->hwidx1 = -1;
rxb->hwidx2 = -1;
for (j = 0; j < SGE_FLBUF_SIZES; j++) {
int hwsize = sp->sge_fl_buffer_size[j];
if (!hwsz_ok(sc, hwsize))
continue;
/* hwidx for size1 */
if (rxb->hwidx1 == -1 && rxb->size1 == hwsize)
rxb->hwidx1 = j;
/* hwidx for size2 (buffer packing) */
if (rxb->size1 - CL_METADATA_SIZE < hwsize)
continue;
n = rxb->size1 - hwsize - CL_METADATA_SIZE;
if (n == 0) {
rxb->hwidx2 = j;
rxb->size2 = hwsize;
break; /* stop looking */
}
if (rxb->hwidx2 != -1) {
if (n < sp->sge_fl_buffer_size[rxb->hwidx2] -
hwsize - CL_METADATA_SIZE) {
rxb->hwidx2 = j;
rxb->size2 = hwsize;
}
} else if (n <= 2 * CL_METADATA_SIZE) {
rxb->hwidx2 = j;
rxb->size2 = hwsize;
}
}
if (rxb->hwidx2 != -1)
sc->flags |= BUF_PACKING_OK;
if (s->safe_zidx == -1 && rxb->size1 == safest_rx_cluster)
s->safe_zidx = i;
}
if (sc->flags & IS_VF)
return (0);
v = V_HPZ0(0) | V_HPZ1(2) | V_HPZ2(4) | V_HPZ3(6);
r = t4_read_reg(sc, A_ULP_RX_TDDP_PSZ);
if (r != v) {
device_printf(sc->dev, "invalid ULP_RX_TDDP_PSZ(0x%x)\n", r);
rc = EINVAL;
}
m = v = F_TDDPTAGTCB;
r = t4_read_reg(sc, A_ULP_RX_CTL);
if ((r & m) != v) {
device_printf(sc->dev, "invalid ULP_RX_CTL(0x%x)\n", r);
rc = EINVAL;
}
m = V_INDICATESIZE(M_INDICATESIZE) | F_REARMDDPOFFSET |
F_RESETDDPOFFSET;
v = V_INDICATESIZE(indsz) | F_REARMDDPOFFSET | F_RESETDDPOFFSET;
r = t4_read_reg(sc, A_TP_PARA_REG5);
if ((r & m) != v) {
device_printf(sc->dev, "invalid TP_PARA_REG5(0x%x)\n", r);
rc = EINVAL;
}
t4_init_tp_params(sc, 1);
t4_read_mtu_tbl(sc, sc->params.mtus, NULL);
t4_load_mtus(sc, sc->params.mtus, sc->params.a_wnd, sc->params.b_wnd);
return (rc);
}
int
t4_create_dma_tag(struct adapter *sc)
{
int rc;
rc = bus_dma_tag_create(bus_get_dma_tag(sc->dev), 1, 0,
BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, BUS_SPACE_MAXSIZE,
BUS_SPACE_UNRESTRICTED, BUS_SPACE_MAXSIZE, BUS_DMA_ALLOCNOW, NULL,
NULL, &sc->dmat);
if (rc != 0) {
device_printf(sc->dev,
"failed to create main DMA tag: %d\n", rc);
}
return (rc);
}
void
t4_sge_sysctls(struct adapter *sc, struct sysctl_ctx_list *ctx,
struct sysctl_oid_list *children)
{
struct sge_params *sp = &sc->params.sge;
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "buffer_sizes",
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, sc, 0,
sysctl_bufsizes, "A", "freelist buffer sizes");
SYSCTL_ADD_INT(ctx, children, OID_AUTO, "fl_pktshift", CTLFLAG_RD,
NULL, sp->fl_pktshift, "payload DMA offset in rx buffer (bytes)");
SYSCTL_ADD_INT(ctx, children, OID_AUTO, "fl_pad", CTLFLAG_RD,
NULL, sp->pad_boundary, "payload pad boundary (bytes)");
SYSCTL_ADD_INT(ctx, children, OID_AUTO, "spg_len", CTLFLAG_RD,
NULL, sp->spg_len, "status page size (bytes)");
SYSCTL_ADD_INT(ctx, children, OID_AUTO, "cong_drop", CTLFLAG_RD,
NULL, cong_drop, "congestion drop setting");
SYSCTL_ADD_INT(ctx, children, OID_AUTO, "fl_pack", CTLFLAG_RD,
NULL, sp->pack_boundary, "payload pack boundary (bytes)");
}
int
t4_destroy_dma_tag(struct adapter *sc)
{
if (sc->dmat)
bus_dma_tag_destroy(sc->dmat);
return (0);
}
/*
* Allocate and initialize the firmware event queue, control queues, and special
* purpose rx queues owned by the adapter.
*
* Returns errno on failure. Resources allocated up to that point may still be
* allocated. Caller is responsible for cleanup in case this function fails.
*/
int
t4_setup_adapter_queues(struct adapter *sc)
{
struct sysctl_oid *oid;
struct sysctl_oid_list *children;
int rc, i;
ADAPTER_LOCK_ASSERT_NOTOWNED(sc);
sysctl_ctx_init(&sc->ctx);
sc->flags |= ADAP_SYSCTL_CTX;
/*
* Firmware event queue
*/
rc = alloc_fwq(sc);
if (rc != 0)
return (rc);
/*
* That's all for the VF driver.
*/
if (sc->flags & IS_VF)
return (rc);
oid = device_get_sysctl_tree(sc->dev);
children = SYSCTL_CHILDREN(oid);
/*
* XXX: General purpose rx queues, one per port.
*/
/*
* Control queues, one per port.
*/
oid = SYSCTL_ADD_NODE(&sc->ctx, children, OID_AUTO, "ctrlq",
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "control queues");
for_each_port(sc, i) {
struct sge_wrq *ctrlq = &sc->sge.ctrlq[i];
rc = alloc_ctrlq(sc, ctrlq, i, oid);
if (rc != 0)
return (rc);
}
return (rc);
}
/*
* Idempotent
*/
int
t4_teardown_adapter_queues(struct adapter *sc)
{
int i;
ADAPTER_LOCK_ASSERT_NOTOWNED(sc);
/* Do this before freeing the queue */
if (sc->flags & ADAP_SYSCTL_CTX) {
sysctl_ctx_free(&sc->ctx);
sc->flags &= ~ADAP_SYSCTL_CTX;
}
if (!(sc->flags & IS_VF)) {
for_each_port(sc, i)
free_wrq(sc, &sc->sge.ctrlq[i]);
}
free_fwq(sc);
return (0);
}
/* Maximum payload that could arrive with a single iq descriptor. */
static inline int
max_rx_payload(struct adapter *sc, struct ifnet *ifp, const bool ofld)
{
int maxp;
/* large enough even when hw VLAN extraction is disabled */
maxp = sc->params.sge.fl_pktshift + ETHER_HDR_LEN +
ETHER_VLAN_ENCAP_LEN + ifp->if_mtu;
if (ofld && sc->tt.tls && sc->cryptocaps & FW_CAPS_CONFIG_TLSKEYS &&
maxp < sc->params.tp.max_rx_pdu)
maxp = sc->params.tp.max_rx_pdu;
return (maxp);
}
int
t4_setup_vi_queues(struct vi_info *vi)
{
int rc = 0, i, intr_idx, iqidx;
struct sge_rxq *rxq;
struct sge_txq *txq;
#ifdef TCP_OFFLOAD
struct sge_ofld_rxq *ofld_rxq;
#endif
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
struct sge_wrq *ofld_txq;
#endif
#ifdef DEV_NETMAP
int saved_idx;
struct sge_nm_rxq *nm_rxq;
struct sge_nm_txq *nm_txq;
#endif
char name[16];
struct port_info *pi = vi->pi;
struct adapter *sc = pi->adapter;
struct ifnet *ifp = vi->ifp;
struct sysctl_oid *oid = device_get_sysctl_tree(vi->dev);
struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid);
int maxp;
/* Interrupt vector to start from (when using multiple vectors) */
intr_idx = vi->first_intr;
#ifdef DEV_NETMAP
saved_idx = intr_idx;
if (ifp->if_capabilities & IFCAP_NETMAP) {
/* netmap is supported with direct interrupts only. */
MPASS(!forwarding_intr_to_fwq(sc));
/*
* We don't have buffers to back the netmap rx queues
* right now so we create the queues in a way that
* doesn't set off any congestion signal in the chip.
*/
oid = SYSCTL_ADD_NODE(&vi->ctx, children, OID_AUTO, "nm_rxq",
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "rx queues");
for_each_nm_rxq(vi, i, nm_rxq) {
rc = alloc_nm_rxq(vi, nm_rxq, intr_idx, i, oid);
if (rc != 0)
goto done;
intr_idx++;
}
oid = SYSCTL_ADD_NODE(&vi->ctx, children, OID_AUTO, "nm_txq",
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "tx queues");
for_each_nm_txq(vi, i, nm_txq) {
iqidx = vi->first_nm_rxq + (i % vi->nnmrxq);
rc = alloc_nm_txq(vi, nm_txq, iqidx, i, oid);
if (rc != 0)
goto done;
}
}
/* Normal rx queues and netmap rx queues share the same interrupts. */
intr_idx = saved_idx;
#endif
/*
* Allocate rx queues first because a default iqid is required when
* creating a tx queue.
*/
maxp = max_rx_payload(sc, ifp, false);
oid = SYSCTL_ADD_NODE(&vi->ctx, children, OID_AUTO, "rxq",
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "rx queues");
for_each_rxq(vi, i, rxq) {
init_iq(&rxq->iq, sc, vi->tmr_idx, vi->pktc_idx, vi->qsize_rxq);
snprintf(name, sizeof(name), "%s rxq%d-fl",
device_get_nameunit(vi->dev), i);
init_fl(sc, &rxq->fl, vi->qsize_rxq / 8, maxp, name);
rc = alloc_rxq(vi, rxq,
forwarding_intr_to_fwq(sc) ? -1 : intr_idx, i, oid);
if (rc != 0)
goto done;
intr_idx++;
}
#ifdef DEV_NETMAP
if (ifp->if_capabilities & IFCAP_NETMAP)
intr_idx = saved_idx + max(vi->nrxq, vi->nnmrxq);
#endif
#ifdef TCP_OFFLOAD
maxp = max_rx_payload(sc, ifp, true);
oid = SYSCTL_ADD_NODE(&vi->ctx, children, OID_AUTO, "ofld_rxq",
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "rx queues for offloaded TCP connections");
for_each_ofld_rxq(vi, i, ofld_rxq) {
init_iq(&ofld_rxq->iq, sc, vi->ofld_tmr_idx, vi->ofld_pktc_idx,
vi->qsize_rxq);
snprintf(name, sizeof(name), "%s ofld_rxq%d-fl",
device_get_nameunit(vi->dev), i);
init_fl(sc, &ofld_rxq->fl, vi->qsize_rxq / 8, maxp, name);
rc = alloc_ofld_rxq(vi, ofld_rxq,
forwarding_intr_to_fwq(sc) ? -1 : intr_idx, i, oid);
if (rc != 0)
goto done;
intr_idx++;
}
#endif
/*
* Now the tx queues.
*/
oid = SYSCTL_ADD_NODE(&vi->ctx, children, OID_AUTO, "txq",
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "tx queues");
for_each_txq(vi, i, txq) {
iqidx = vi->first_rxq + (i % vi->nrxq);
snprintf(name, sizeof(name), "%s txq%d",
device_get_nameunit(vi->dev), i);
init_eq(sc, &txq->eq, EQ_ETH, vi->qsize_txq, pi->tx_chan,
sc->sge.rxq[iqidx].iq.cntxt_id, name);
rc = alloc_txq(vi, txq, i, oid);
if (rc != 0)
goto done;
}
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
oid = SYSCTL_ADD_NODE(&vi->ctx, children, OID_AUTO, "ofld_txq",
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "tx queues for TOE/ETHOFLD");
for_each_ofld_txq(vi, i, ofld_txq) {
struct sysctl_oid *oid2;
snprintf(name, sizeof(name), "%s ofld_txq%d",
device_get_nameunit(vi->dev), i);
if (vi->nofldrxq > 0) {
iqidx = vi->first_ofld_rxq + (i % vi->nofldrxq);
init_eq(sc, &ofld_txq->eq, EQ_OFLD, vi->qsize_txq,
pi->tx_chan, sc->sge.ofld_rxq[iqidx].iq.cntxt_id,
name);
} else {
iqidx = vi->first_rxq + (i % vi->nrxq);
init_eq(sc, &ofld_txq->eq, EQ_OFLD, vi->qsize_txq,
pi->tx_chan, sc->sge.rxq[iqidx].iq.cntxt_id, name);
}
snprintf(name, sizeof(name), "%d", i);
oid2 = SYSCTL_ADD_NODE(&vi->ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
name, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "offload tx queue");
rc = alloc_wrq(sc, vi, ofld_txq, oid2);
if (rc != 0)
goto done;
}
#endif
done:
if (rc)
t4_teardown_vi_queues(vi);
return (rc);
}
/*
* Idempotent
*/
int
t4_teardown_vi_queues(struct vi_info *vi)
{
int i;
struct sge_rxq *rxq;
struct sge_txq *txq;
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
struct port_info *pi = vi->pi;
struct adapter *sc = pi->adapter;
struct sge_wrq *ofld_txq;
#endif
#ifdef TCP_OFFLOAD
struct sge_ofld_rxq *ofld_rxq;
#endif
#ifdef DEV_NETMAP
struct sge_nm_rxq *nm_rxq;
struct sge_nm_txq *nm_txq;
#endif
/* Do this before freeing the queues */
if (vi->flags & VI_SYSCTL_CTX) {
sysctl_ctx_free(&vi->ctx);
vi->flags &= ~VI_SYSCTL_CTX;
}
#ifdef DEV_NETMAP
if (vi->ifp->if_capabilities & IFCAP_NETMAP) {
for_each_nm_txq(vi, i, nm_txq) {
free_nm_txq(vi, nm_txq);
}
for_each_nm_rxq(vi, i, nm_rxq) {
free_nm_rxq(vi, nm_rxq);
}
}
#endif
/*
* Take down all the tx queues first, as they reference the rx queues
* (for egress updates, etc.).
*/
for_each_txq(vi, i, txq) {
free_txq(vi, txq);
}
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
for_each_ofld_txq(vi, i, ofld_txq) {
free_wrq(sc, ofld_txq);
}
#endif
/*
* Then take down the rx queues.
*/
for_each_rxq(vi, i, rxq) {
free_rxq(vi, rxq);
}
#ifdef TCP_OFFLOAD
for_each_ofld_rxq(vi, i, ofld_rxq) {
free_ofld_rxq(vi, ofld_rxq);
}
#endif
return (0);
}
/*
* Interrupt handler when the driver is using only 1 interrupt. This is a very
* unusual scenario.
*
* a) Deals with errors, if any.
* b) Services firmware event queue, which is taking interrupts for all other
* queues.
*/
void
t4_intr_all(void *arg)
{
struct adapter *sc = arg;
struct sge_iq *fwq = &sc->sge.fwq;
MPASS(sc->intr_count == 1);
if (sc->intr_type == INTR_INTX)
t4_write_reg(sc, MYPF_REG(A_PCIE_PF_CLI), 0);
t4_intr_err(arg);
t4_intr_evt(fwq);
}
/*
* Interrupt handler for errors (installed directly when multiple interrupts are
* being used, or called by t4_intr_all).
*/
void
t4_intr_err(void *arg)
{
struct adapter *sc = arg;
uint32_t v;
const bool verbose = (sc->debug_flags & DF_VERBOSE_SLOWINTR) != 0;
if (sc->flags & ADAP_ERR)
return;
v = t4_read_reg(sc, MYPF_REG(A_PL_PF_INT_CAUSE));
if (v & F_PFSW) {
sc->swintr++;
t4_write_reg(sc, MYPF_REG(A_PL_PF_INT_CAUSE), v);
}
t4_slow_intr_handler(sc, verbose);
}
/*
* Interrupt handler for iq-only queues. The firmware event queue is the only
* such queue right now.
*/
void
t4_intr_evt(void *arg)
{
struct sge_iq *iq = arg;
if (atomic_cmpset_int(&iq->state, IQS_IDLE, IQS_BUSY)) {
service_iq(iq, 0);
(void) atomic_cmpset_int(&iq->state, IQS_BUSY, IQS_IDLE);
}
}
/*
* Interrupt handler for iq+fl queues.
*/
void
t4_intr(void *arg)
{
struct sge_iq *iq = arg;
if (atomic_cmpset_int(&iq->state, IQS_IDLE, IQS_BUSY)) {
service_iq_fl(iq, 0);
(void) atomic_cmpset_int(&iq->state, IQS_BUSY, IQS_IDLE);
}
}
#ifdef DEV_NETMAP
/*
* Interrupt handler for netmap rx queues.
*/
void
t4_nm_intr(void *arg)
{
struct sge_nm_rxq *nm_rxq = arg;
if (atomic_cmpset_int(&nm_rxq->nm_state, NM_ON, NM_BUSY)) {
service_nm_rxq(nm_rxq);
(void) atomic_cmpset_int(&nm_rxq->nm_state, NM_BUSY, NM_ON);
}
}
/*
* Interrupt handler for vectors shared between NIC and netmap rx queues.
*/
void
t4_vi_intr(void *arg)
{
struct irq *irq = arg;
MPASS(irq->nm_rxq != NULL);
t4_nm_intr(irq->nm_rxq);
MPASS(irq->rxq != NULL);
t4_intr(irq->rxq);
}
#endif
/*
* Deals with interrupts on an iq-only (no freelist) queue.
*/
static int
service_iq(struct sge_iq *iq, int budget)
{
struct sge_iq *q;
struct adapter *sc = iq->adapter;
struct iq_desc *d = &iq->desc[iq->cidx];
int ndescs = 0, limit;
int rsp_type;
uint32_t lq;
STAILQ_HEAD(, sge_iq) iql = STAILQ_HEAD_INITIALIZER(iql);
KASSERT(iq->state == IQS_BUSY, ("%s: iq %p not BUSY", __func__, iq));
KASSERT((iq->flags & IQ_HAS_FL) == 0,
("%s: called for iq %p with fl (iq->flags 0x%x)", __func__, iq,
iq->flags));
MPASS((iq->flags & IQ_ADJ_CREDIT) == 0);
MPASS((iq->flags & IQ_LRO_ENABLED) == 0);
limit = budget ? budget : iq->qsize / 16;
/*
* We always come back and check the descriptor ring for new indirect
* interrupts and other responses after running a single handler.
*/
for (;;) {
while ((d->rsp.u.type_gen & F_RSPD_GEN) == iq->gen) {
rmb();
rsp_type = G_RSPD_TYPE(d->rsp.u.type_gen);
lq = be32toh(d->rsp.pldbuflen_qid);
switch (rsp_type) {
case X_RSPD_TYPE_FLBUF:
panic("%s: data for an iq (%p) with no freelist",
__func__, iq);
/* NOTREACHED */
case X_RSPD_TYPE_CPL:
KASSERT(d->rss.opcode < NUM_CPL_CMDS,
("%s: bad opcode %02x.", __func__,
d->rss.opcode));
t4_cpl_handler[d->rss.opcode](iq, &d->rss, NULL);
break;
case X_RSPD_TYPE_INTR:
/*
* There are 1K interrupt-capable queues (qids 0
* through 1023). A response type indicating a
* forwarded interrupt with a qid >= 1K is an
* iWARP async notification.
*/
if (__predict_true(lq >= 1024)) {
t4_an_handler(iq, &d->rsp);
break;
}
q = sc->sge.iqmap[lq - sc->sge.iq_start -
sc->sge.iq_base];
if (atomic_cmpset_int(&q->state, IQS_IDLE,
IQS_BUSY)) {
if (service_iq_fl(q, q->qsize / 16) == 0) {
(void) atomic_cmpset_int(&q->state,
IQS_BUSY, IQS_IDLE);
} else {
STAILQ_INSERT_TAIL(&iql, q,
link);
}
}
break;
default:
KASSERT(0,
("%s: illegal response type %d on iq %p",
__func__, rsp_type, iq));
log(LOG_ERR,
"%s: illegal response type %d on iq %p",
device_get_nameunit(sc->dev), rsp_type, iq);
break;
}
d++;
if (__predict_false(++iq->cidx == iq->sidx)) {
iq->cidx = 0;
iq->gen ^= F_RSPD_GEN;
d = &iq->desc[0];
}
if (__predict_false(++ndescs == limit)) {
t4_write_reg(sc, sc->sge_gts_reg,
V_CIDXINC(ndescs) |
V_INGRESSQID(iq->cntxt_id) |
V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX)));
ndescs = 0;
if (budget) {
return (EINPROGRESS);
}
}
}
if (STAILQ_EMPTY(&iql))
break;
/*
* Process the head only, and send it to the back of the list if
* it's still not done.
*/
q = STAILQ_FIRST(&iql);
STAILQ_REMOVE_HEAD(&iql, link);
if (service_iq_fl(q, q->qsize / 8) == 0)
(void) atomic_cmpset_int(&q->state, IQS_BUSY, IQS_IDLE);
else
STAILQ_INSERT_TAIL(&iql, q, link);
}
t4_write_reg(sc, sc->sge_gts_reg, V_CIDXINC(ndescs) |
V_INGRESSQID((u32)iq->cntxt_id) | V_SEINTARM(iq->intr_params));
return (0);
}
static inline int
sort_before_lro(struct lro_ctrl *lro)
{
return (lro->lro_mbuf_max != 0);
}
static inline uint64_t
last_flit_to_ns(struct adapter *sc, uint64_t lf)
{
uint64_t n = be64toh(lf) & 0xfffffffffffffff; /* 60b, not 64b. */
if (n > UINT64_MAX / 1000000)
return (n / sc->params.vpd.cclk * 1000000);
else
return (n * 1000000 / sc->params.vpd.cclk);
}
static inline void
move_to_next_rxbuf(struct sge_fl *fl)
{
fl->rx_offset = 0;
if (__predict_false((++fl->cidx & 7) == 0)) {
uint16_t cidx = fl->cidx >> 3;
if (__predict_false(cidx == fl->sidx))
fl->cidx = cidx = 0;
fl->hw_cidx = cidx;
}
}
/*
* Deals with interrupts on an iq+fl queue.
*/
static int
service_iq_fl(struct sge_iq *iq, int budget)
{
struct sge_rxq *rxq = iq_to_rxq(iq);
struct sge_fl *fl;
struct adapter *sc = iq->adapter;
struct iq_desc *d = &iq->desc[iq->cidx];
int ndescs, limit;
int rsp_type, starved;
uint32_t lq;
uint16_t fl_hw_cidx;
struct mbuf *m0;
#if defined(INET) || defined(INET6)
const struct timeval lro_timeout = {0, sc->lro_timeout};
struct lro_ctrl *lro = &rxq->lro;
#endif
KASSERT(iq->state == IQS_BUSY, ("%s: iq %p not BUSY", __func__, iq));
MPASS(iq->flags & IQ_HAS_FL);
ndescs = 0;
#if defined(INET) || defined(INET6)
if (iq->flags & IQ_ADJ_CREDIT) {
MPASS(sort_before_lro(lro));
iq->flags &= ~IQ_ADJ_CREDIT;
if ((d->rsp.u.type_gen & F_RSPD_GEN) != iq->gen) {
tcp_lro_flush_all(lro);
t4_write_reg(sc, sc->sge_gts_reg, V_CIDXINC(1) |
V_INGRESSQID((u32)iq->cntxt_id) |
V_SEINTARM(iq->intr_params));
return (0);
}
ndescs = 1;
}
#else
MPASS((iq->flags & IQ_ADJ_CREDIT) == 0);
#endif
limit = budget ? budget : iq->qsize / 16;
fl = &rxq->fl;
fl_hw_cidx = fl->hw_cidx; /* stable snapshot */
while ((d->rsp.u.type_gen & F_RSPD_GEN) == iq->gen) {
rmb();
m0 = NULL;
rsp_type = G_RSPD_TYPE(d->rsp.u.type_gen);
lq = be32toh(d->rsp.pldbuflen_qid);
switch (rsp_type) {
case X_RSPD_TYPE_FLBUF:
if (lq & F_RSPD_NEWBUF) {
if (fl->rx_offset > 0)
move_to_next_rxbuf(fl);
lq = G_RSPD_LEN(lq);
}
if (IDXDIFF(fl->hw_cidx, fl_hw_cidx, fl->sidx) > 4) {
FL_LOCK(fl);
refill_fl(sc, fl, 64);
FL_UNLOCK(fl);
fl_hw_cidx = fl->hw_cidx;
}
if (d->rss.opcode == CPL_RX_PKT) {
if (__predict_true(eth_rx(sc, rxq, d, lq) == 0))
break;
goto out;
}
m0 = get_fl_payload(sc, fl, lq);
if (__predict_false(m0 == NULL))
goto out;
/* fall through */
case X_RSPD_TYPE_CPL:
KASSERT(d->rss.opcode < NUM_CPL_CMDS,
("%s: bad opcode %02x.", __func__, d->rss.opcode));
t4_cpl_handler[d->rss.opcode](iq, &d->rss, m0);
break;
case X_RSPD_TYPE_INTR:
/*
* There are 1K interrupt-capable queues (qids 0
* through 1023). A response type indicating a
* forwarded interrupt with a qid >= 1K is an
* iWARP async notification. That is the only
* acceptable indirect interrupt on this queue.
*/
if (__predict_false(lq < 1024)) {
panic("%s: indirect interrupt on iq_fl %p "
"with qid %u", __func__, iq, lq);
}
t4_an_handler(iq, &d->rsp);
break;
default:
KASSERT(0, ("%s: illegal response type %d on iq %p",
__func__, rsp_type, iq));
log(LOG_ERR, "%s: illegal response type %d on iq %p",
device_get_nameunit(sc->dev), rsp_type, iq);
break;
}
d++;
if (__predict_false(++iq->cidx == iq->sidx)) {
iq->cidx = 0;
iq->gen ^= F_RSPD_GEN;
d = &iq->desc[0];
}
if (__predict_false(++ndescs == limit)) {
t4_write_reg(sc, sc->sge_gts_reg, V_CIDXINC(ndescs) |
V_INGRESSQID(iq->cntxt_id) |
V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX)));
#if defined(INET) || defined(INET6)
if (iq->flags & IQ_LRO_ENABLED &&
!sort_before_lro(lro) &&
sc->lro_timeout != 0) {
tcp_lro_flush_inactive(lro, &lro_timeout);
}
#endif
if (budget)
return (EINPROGRESS);
ndescs = 0;
}
}
out:
#if defined(INET) || defined(INET6)
if (iq->flags & IQ_LRO_ENABLED) {
if (ndescs > 0 && lro->lro_mbuf_count > 8) {
MPASS(sort_before_lro(lro));
/* hold back one credit and don't flush LRO state */
iq->flags |= IQ_ADJ_CREDIT;
ndescs--;
} else {
tcp_lro_flush_all(lro);
}
}
#endif
t4_write_reg(sc, sc->sge_gts_reg, V_CIDXINC(ndescs) |
V_INGRESSQID((u32)iq->cntxt_id) | V_SEINTARM(iq->intr_params));
FL_LOCK(fl);
starved = refill_fl(sc, fl, 64);
FL_UNLOCK(fl);
if (__predict_false(starved != 0))
add_fl_to_sfl(sc, fl);
return (0);
}
static inline struct cluster_metadata *
cl_metadata(struct fl_sdesc *sd)
{
return ((void *)(sd->cl + sd->moff));
}
static void
rxb_free(struct mbuf *m)
{
struct cluster_metadata *clm = m->m_ext.ext_arg1;
uma_zfree(clm->zone, clm->cl);
counter_u64_add(extfree_rels, 1);
}
/*
* The mbuf returned comes from zone_muf and carries the payload in one of these
* ways
* a) complete frame inside the mbuf
* b) m_cljset (for clusters without metadata)
* d) m_extaddref (cluster with metadata)
*/
static struct mbuf *
get_scatter_segment(struct adapter *sc, struct sge_fl *fl, int fr_offset,
int remaining)
{
struct mbuf *m;
struct fl_sdesc *sd = &fl->sdesc[fl->cidx];
struct rx_buf_info *rxb = &sc->sge.rx_buf_info[sd->zidx];
struct cluster_metadata *clm;
int len, blen;
caddr_t payload;
if (fl->flags & FL_BUF_PACKING) {
u_int l, pad;
blen = rxb->size2 - fl->rx_offset; /* max possible in this buf */
len = min(remaining, blen);
payload = sd->cl + fl->rx_offset;
l = fr_offset + len;
pad = roundup2(l, fl->buf_boundary) - l;
if (fl->rx_offset + len + pad < rxb->size2)
blen = len + pad;
MPASS(fl->rx_offset + blen <= rxb->size2);
} else {
MPASS(fl->rx_offset == 0); /* not packing */
blen = rxb->size1;
len = min(remaining, blen);
payload = sd->cl;
}
if (fr_offset == 0) {
m = m_gethdr(M_NOWAIT, MT_DATA);
if (__predict_false(m == NULL))
return (NULL);
m->m_pkthdr.len = remaining;
} else {
m = m_get(M_NOWAIT, MT_DATA);
if (__predict_false(m == NULL))
return (NULL);
}
m->m_len = len;
if (sc->sc_do_rxcopy && len < RX_COPY_THRESHOLD) {
/* copy data to mbuf */
bcopy(payload, mtod(m, caddr_t), len);
if (fl->flags & FL_BUF_PACKING) {
fl->rx_offset += blen;
MPASS(fl->rx_offset <= rxb->size2);
if (fl->rx_offset < rxb->size2)
return (m); /* without advancing the cidx */
}
} else if (fl->flags & FL_BUF_PACKING) {
clm = cl_metadata(sd);
if (sd->nmbuf++ == 0) {
clm->refcount = 1;
clm->zone = rxb->zone;
clm->cl = sd->cl;
counter_u64_add(extfree_refs, 1);
}
m_extaddref(m, payload, blen, &clm->refcount, rxb_free, clm,
NULL);
fl->rx_offset += blen;
MPASS(fl->rx_offset <= rxb->size2);
if (fl->rx_offset < rxb->size2)
return (m); /* without advancing the cidx */
} else {
m_cljset(m, sd->cl, rxb->type);
sd->cl = NULL; /* consumed, not a recycle candidate */
}
move_to_next_rxbuf(fl);
return (m);
}
static struct mbuf *
get_fl_payload(struct adapter *sc, struct sge_fl *fl, const u_int plen)
{
struct mbuf *m0, *m, **pnext;
u_int remaining;
if (__predict_false(fl->flags & FL_BUF_RESUME)) {
M_ASSERTPKTHDR(fl->m0);
MPASS(fl->m0->m_pkthdr.len == plen);
MPASS(fl->remaining < plen);
m0 = fl->m0;
pnext = fl->pnext;
remaining = fl->remaining;
fl->flags &= ~FL_BUF_RESUME;
goto get_segment;
}
/*
* Payload starts at rx_offset in the current hw buffer. Its length is
* 'len' and it may span multiple hw buffers.
*/
m0 = get_scatter_segment(sc, fl, 0, plen);
if (m0 == NULL)
return (NULL);
remaining = plen - m0->m_len;
pnext = &m0->m_next;
while (remaining > 0) {
get_segment:
MPASS(fl->rx_offset == 0);
m = get_scatter_segment(sc, fl, plen - remaining, remaining);
if (__predict_false(m == NULL)) {
fl->m0 = m0;
fl->pnext = pnext;
fl->remaining = remaining;
fl->flags |= FL_BUF_RESUME;
return (NULL);
}
*pnext = m;
pnext = &m->m_next;
remaining -= m->m_len;
}
*pnext = NULL;
M_ASSERTPKTHDR(m0);
return (m0);
}
static int
skip_scatter_segment(struct adapter *sc, struct sge_fl *fl, int fr_offset,
int remaining)
{
struct fl_sdesc *sd = &fl->sdesc[fl->cidx];
struct rx_buf_info *rxb = &sc->sge.rx_buf_info[sd->zidx];
int len, blen;
if (fl->flags & FL_BUF_PACKING) {
u_int l, pad;
blen = rxb->size2 - fl->rx_offset; /* max possible in this buf */
len = min(remaining, blen);
l = fr_offset + len;
pad = roundup2(l, fl->buf_boundary) - l;
if (fl->rx_offset + len + pad < rxb->size2)
blen = len + pad;
fl->rx_offset += blen;
MPASS(fl->rx_offset <= rxb->size2);
if (fl->rx_offset < rxb->size2)
return (len); /* without advancing the cidx */
} else {
MPASS(fl->rx_offset == 0); /* not packing */
blen = rxb->size1;
len = min(remaining, blen);
}
move_to_next_rxbuf(fl);
return (len);
}
static inline void
skip_fl_payload(struct adapter *sc, struct sge_fl *fl, int plen)
{
int remaining, fr_offset, len;
fr_offset = 0;
remaining = plen;
while (remaining > 0) {
len = skip_scatter_segment(sc, fl, fr_offset, remaining);
fr_offset += len;
remaining -= len;
}
}
static inline int
get_segment_len(struct adapter *sc, struct sge_fl *fl, int plen)
{
int len;
struct fl_sdesc *sd = &fl->sdesc[fl->cidx];
struct rx_buf_info *rxb = &sc->sge.rx_buf_info[sd->zidx];
if (fl->flags & FL_BUF_PACKING)
len = rxb->size2 - fl->rx_offset;
else
len = rxb->size1;
return (min(plen, len));
}
static int
eth_rx(struct adapter *sc, struct sge_rxq *rxq, const struct iq_desc *d,
u_int plen)
{
struct mbuf *m0;
struct ifnet *ifp = rxq->ifp;
struct sge_fl *fl = &rxq->fl;
struct vi_info *vi = ifp->if_softc;
const struct cpl_rx_pkt *cpl;
#if defined(INET) || defined(INET6)
struct lro_ctrl *lro = &rxq->lro;
#endif
uint16_t err_vec, tnl_type, tnlhdr_len;
static const int sw_hashtype[4][2] = {
{M_HASHTYPE_NONE, M_HASHTYPE_NONE},
{M_HASHTYPE_RSS_IPV4, M_HASHTYPE_RSS_IPV6},
{M_HASHTYPE_RSS_TCP_IPV4, M_HASHTYPE_RSS_TCP_IPV6},
{M_HASHTYPE_RSS_UDP_IPV4, M_HASHTYPE_RSS_UDP_IPV6},
};
static const int sw_csum_flags[2][2] = {
{
/* IP, inner IP */
CSUM_ENCAP_VXLAN |
CSUM_L3_CALC | CSUM_L3_VALID |
CSUM_L4_CALC | CSUM_L4_VALID |
CSUM_INNER_L3_CALC | CSUM_INNER_L3_VALID |
CSUM_INNER_L4_CALC | CSUM_INNER_L4_VALID,
/* IP, inner IP6 */
CSUM_ENCAP_VXLAN |
CSUM_L3_CALC | CSUM_L3_VALID |
CSUM_L4_CALC | CSUM_L4_VALID |
CSUM_INNER_L4_CALC | CSUM_INNER_L4_VALID,
},
{
/* IP6, inner IP */
CSUM_ENCAP_VXLAN |
CSUM_L4_CALC | CSUM_L4_VALID |
CSUM_INNER_L3_CALC | CSUM_INNER_L3_VALID |
CSUM_INNER_L4_CALC | CSUM_INNER_L4_VALID,
/* IP6, inner IP6 */
CSUM_ENCAP_VXLAN |
CSUM_L4_CALC | CSUM_L4_VALID |
CSUM_INNER_L4_CALC | CSUM_INNER_L4_VALID,
},
};
MPASS(plen > sc->params.sge.fl_pktshift);
if (vi->pfil != NULL && PFIL_HOOKED_IN(vi->pfil) &&
__predict_true((fl->flags & FL_BUF_RESUME) == 0)) {
struct fl_sdesc *sd = &fl->sdesc[fl->cidx];
caddr_t frame;
int rc, slen;
slen = get_segment_len(sc, fl, plen) -
sc->params.sge.fl_pktshift;
frame = sd->cl + fl->rx_offset + sc->params.sge.fl_pktshift;
CURVNET_SET_QUIET(ifp->if_vnet);
rc = pfil_run_hooks(vi->pfil, frame, ifp,
slen | PFIL_MEMPTR | PFIL_IN, NULL);
CURVNET_RESTORE();
if (rc == PFIL_DROPPED || rc == PFIL_CONSUMED) {
skip_fl_payload(sc, fl, plen);
return (0);
}
if (rc == PFIL_REALLOCED) {
skip_fl_payload(sc, fl, plen);
m0 = pfil_mem2mbuf(frame);
goto have_mbuf;
}
}
m0 = get_fl_payload(sc, fl, plen);
if (__predict_false(m0 == NULL))
return (ENOMEM);
m0->m_pkthdr.len -= sc->params.sge.fl_pktshift;
m0->m_len -= sc->params.sge.fl_pktshift;
m0->m_data += sc->params.sge.fl_pktshift;
have_mbuf:
m0->m_pkthdr.rcvif = ifp;
M_HASHTYPE_SET(m0, sw_hashtype[d->rss.hash_type][d->rss.ipv6]);
m0->m_pkthdr.flowid = be32toh(d->rss.hash_val);
cpl = (const void *)(&d->rss + 1);
if (sc->params.tp.rx_pkt_encap) {
const uint16_t ev = be16toh(cpl->err_vec);
err_vec = G_T6_COMPR_RXERR_VEC(ev);
tnl_type = G_T6_RX_TNL_TYPE(ev);
tnlhdr_len = G_T6_RX_TNLHDR_LEN(ev);
} else {
err_vec = be16toh(cpl->err_vec);
tnl_type = 0;
tnlhdr_len = 0;
}
if (cpl->csum_calc && err_vec == 0) {
int ipv6 = !!(cpl->l2info & htobe32(F_RXF_IP6));
/* checksum(s) calculated and found to be correct. */
MPASS((cpl->l2info & htobe32(F_RXF_IP)) ^
(cpl->l2info & htobe32(F_RXF_IP6)));
m0->m_pkthdr.csum_data = be16toh(cpl->csum);
if (tnl_type == 0) {
if (!ipv6 && ifp->if_capenable & IFCAP_RXCSUM) {
m0->m_pkthdr.csum_flags = CSUM_L3_CALC |
CSUM_L3_VALID | CSUM_L4_CALC |
CSUM_L4_VALID;
} else if (ipv6 && ifp->if_capenable & IFCAP_RXCSUM_IPV6) {
m0->m_pkthdr.csum_flags = CSUM_L4_CALC |
CSUM_L4_VALID;
}
rxq->rxcsum++;
} else {
MPASS(tnl_type == RX_PKT_TNL_TYPE_VXLAN);
if (__predict_false(cpl->ip_frag)) {
/*
* csum_data is for the inner frame (which is an
* IP fragment) and is not 0xffff. There is no
* way to pass the inner csum_data to the stack.
* We don't want the stack to use the inner
* csum_data to validate the outer frame or it
* will get rejected. So we fix csum_data here
* and let sw do the checksum of inner IP
* fragments.
*
* XXX: Need 32b for csum_data2 in an rx mbuf.
* Maybe stuff it into rcv_tstmp?
*/
m0->m_pkthdr.csum_data = 0xffff;
if (ipv6) {
m0->m_pkthdr.csum_flags = CSUM_L4_CALC |
CSUM_L4_VALID;
} else {
m0->m_pkthdr.csum_flags = CSUM_L3_CALC |
CSUM_L3_VALID | CSUM_L4_CALC |
CSUM_L4_VALID;
}
} else {
int outer_ipv6;
MPASS(m0->m_pkthdr.csum_data == 0xffff);
outer_ipv6 = tnlhdr_len >=
sizeof(struct ether_header) +
sizeof(struct ip6_hdr);
m0->m_pkthdr.csum_flags =
sw_csum_flags[outer_ipv6][ipv6];
}
rxq->vxlan_rxcsum++;
}
}
if (cpl->vlan_ex) {
m0->m_pkthdr.ether_vtag = be16toh(cpl->vlan);
m0->m_flags |= M_VLANTAG;
rxq->vlan_extraction++;
}
if (rxq->iq.flags & IQ_RX_TIMESTAMP) {
/*
* Fill up rcv_tstmp but do not set M_TSTMP.
* rcv_tstmp is not in the format that the
* kernel expects and we don't want to mislead
* it. For now this is only for custom code
* that knows how to interpret cxgbe's stamp.
*/
m0->m_pkthdr.rcv_tstmp =
last_flit_to_ns(sc, d->rsp.u.last_flit);
#ifdef notyet
m0->m_flags |= M_TSTMP;
#endif
}
#ifdef NUMA
m0->m_pkthdr.numa_domain = ifp->if_numa_domain;
#endif
#if defined(INET) || defined(INET6)
if (rxq->iq.flags & IQ_LRO_ENABLED && tnl_type == 0 &&
(M_HASHTYPE_GET(m0) == M_HASHTYPE_RSS_TCP_IPV4 ||
M_HASHTYPE_GET(m0) == M_HASHTYPE_RSS_TCP_IPV6)) {
if (sort_before_lro(lro)) {
tcp_lro_queue_mbuf(lro, m0);
return (0); /* queued for sort, then LRO */
}
if (tcp_lro_rx(lro, m0, 0) == 0)
return (0); /* queued for LRO */
}
#endif
ifp->if_input(ifp, m0);
return (0);
}
/*
* Must drain the wrq or make sure that someone else will.
*/
static void
wrq_tx_drain(void *arg, int n)
{
struct sge_wrq *wrq = arg;
struct sge_eq *eq = &wrq->eq;
EQ_LOCK(eq);
if (TAILQ_EMPTY(&wrq->incomplete_wrs) && !STAILQ_EMPTY(&wrq->wr_list))
drain_wrq_wr_list(wrq->adapter, wrq);
EQ_UNLOCK(eq);
}
static void
drain_wrq_wr_list(struct adapter *sc, struct sge_wrq *wrq)
{
struct sge_eq *eq = &wrq->eq;
u_int available, dbdiff; /* # of hardware descriptors */
u_int n;
struct wrqe *wr;
struct fw_eth_tx_pkt_wr *dst; /* any fw WR struct will do */
EQ_LOCK_ASSERT_OWNED(eq);
MPASS(TAILQ_EMPTY(&wrq->incomplete_wrs));
wr = STAILQ_FIRST(&wrq->wr_list);
MPASS(wr != NULL); /* Must be called with something useful to do */
MPASS(eq->pidx == eq->dbidx);
dbdiff = 0;
do {
eq->cidx = read_hw_cidx(eq);
if (eq->pidx == eq->cidx)
available = eq->sidx - 1;
else
available = IDXDIFF(eq->cidx, eq->pidx, eq->sidx) - 1;
MPASS(wr->wrq == wrq);
n = howmany(wr->wr_len, EQ_ESIZE);
if (available < n)
break;
dst = (void *)&eq->desc[eq->pidx];
if (__predict_true(eq->sidx - eq->pidx > n)) {
/* Won't wrap, won't end exactly at the status page. */
bcopy(&wr->wr[0], dst, wr->wr_len);
eq->pidx += n;
} else {
int first_portion = (eq->sidx - eq->pidx) * EQ_ESIZE;
bcopy(&wr->wr[0], dst, first_portion);
if (wr->wr_len > first_portion) {
bcopy(&wr->wr[first_portion], &eq->desc[0],
wr->wr_len - first_portion);
}
eq->pidx = n - (eq->sidx - eq->pidx);
}
wrq->tx_wrs_copied++;
if (available < eq->sidx / 4 &&
atomic_cmpset_int(&eq->equiq, 0, 1)) {
/*
* XXX: This is not 100% reliable with some
* types of WRs. But this is a very unusual
* situation for an ofld/ctrl queue anyway.
*/
dst->equiq_to_len16 |= htobe32(F_FW_WR_EQUIQ |
F_FW_WR_EQUEQ);
}
dbdiff += n;
if (dbdiff >= 16) {
ring_eq_db(sc, eq, dbdiff);
dbdiff = 0;
}
STAILQ_REMOVE_HEAD(&wrq->wr_list, link);
free_wrqe(wr);
MPASS(wrq->nwr_pending > 0);
wrq->nwr_pending--;
MPASS(wrq->ndesc_needed >= n);
wrq->ndesc_needed -= n;
} while ((wr = STAILQ_FIRST(&wrq->wr_list)) != NULL);
if (dbdiff)
ring_eq_db(sc, eq, dbdiff);
}
/*
* Doesn't fail. Holds on to work requests it can't send right away.
*/
void
t4_wrq_tx_locked(struct adapter *sc, struct sge_wrq *wrq, struct wrqe *wr)
{
#ifdef INVARIANTS
struct sge_eq *eq = &wrq->eq;
#endif
EQ_LOCK_ASSERT_OWNED(eq);
MPASS(wr != NULL);
MPASS(wr->wr_len > 0 && wr->wr_len <= SGE_MAX_WR_LEN);
MPASS((wr->wr_len & 0x7) == 0);
STAILQ_INSERT_TAIL(&wrq->wr_list, wr, link);
wrq->nwr_pending++;
wrq->ndesc_needed += howmany(wr->wr_len, EQ_ESIZE);
if (!TAILQ_EMPTY(&wrq->incomplete_wrs))
return; /* commit_wrq_wr will drain wr_list as well. */
drain_wrq_wr_list(sc, wrq);
/* Doorbell must have caught up to the pidx. */
MPASS(eq->pidx == eq->dbidx);
}
void
t4_update_fl_bufsize(struct ifnet *ifp)
{
struct vi_info *vi = ifp->if_softc;
struct adapter *sc = vi->adapter;
struct sge_rxq *rxq;
#ifdef TCP_OFFLOAD
struct sge_ofld_rxq *ofld_rxq;
#endif
struct sge_fl *fl;
int i, maxp;
maxp = max_rx_payload(sc, ifp, false);
for_each_rxq(vi, i, rxq) {
fl = &rxq->fl;
FL_LOCK(fl);
fl->zidx = find_refill_source(sc, maxp,
fl->flags & FL_BUF_PACKING);
FL_UNLOCK(fl);
}
#ifdef TCP_OFFLOAD
maxp = max_rx_payload(sc, ifp, true);
for_each_ofld_rxq(vi, i, ofld_rxq) {
fl = &ofld_rxq->fl;
FL_LOCK(fl);
fl->zidx = find_refill_source(sc, maxp,
fl->flags & FL_BUF_PACKING);
FL_UNLOCK(fl);
}
#endif
}
static inline int
mbuf_nsegs(struct mbuf *m)
{
M_ASSERTPKTHDR(m);
KASSERT(m->m_pkthdr.inner_l5hlen > 0,
("%s: mbuf %p missing information on # of segments.", __func__, m));
return (m->m_pkthdr.inner_l5hlen);
}
static inline void
set_mbuf_nsegs(struct mbuf *m, uint8_t nsegs)
{
M_ASSERTPKTHDR(m);
m->m_pkthdr.inner_l5hlen = nsegs;
}
static inline int
mbuf_cflags(struct mbuf *m)
{
M_ASSERTPKTHDR(m);
return (m->m_pkthdr.PH_loc.eight[4]);
}
static inline void
set_mbuf_cflags(struct mbuf *m, uint8_t flags)
{
M_ASSERTPKTHDR(m);
m->m_pkthdr.PH_loc.eight[4] = flags;
}
static inline int
mbuf_len16(struct mbuf *m)
{
int n;
M_ASSERTPKTHDR(m);
n = m->m_pkthdr.PH_loc.eight[0];
if (!(mbuf_cflags(m) & MC_TLS))
MPASS(n > 0 && n <= SGE_MAX_WR_LEN / 16);
return (n);
}
static inline void
set_mbuf_len16(struct mbuf *m, uint8_t len16)
{
M_ASSERTPKTHDR(m);
if (!(mbuf_cflags(m) & MC_TLS))
MPASS(len16 > 0 && len16 <= SGE_MAX_WR_LEN / 16);
m->m_pkthdr.PH_loc.eight[0] = len16;
}
#ifdef RATELIMIT
static inline int
mbuf_eo_nsegs(struct mbuf *m)
{
M_ASSERTPKTHDR(m);
return (m->m_pkthdr.PH_loc.eight[1]);
}
static inline void
set_mbuf_eo_nsegs(struct mbuf *m, uint8_t nsegs)
{
M_ASSERTPKTHDR(m);
m->m_pkthdr.PH_loc.eight[1] = nsegs;
}
static inline int
mbuf_eo_len16(struct mbuf *m)
{
int n;
M_ASSERTPKTHDR(m);
n = m->m_pkthdr.PH_loc.eight[2];
MPASS(n > 0 && n <= SGE_MAX_WR_LEN / 16);
return (n);
}
static inline void
set_mbuf_eo_len16(struct mbuf *m, uint8_t len16)
{
M_ASSERTPKTHDR(m);
m->m_pkthdr.PH_loc.eight[2] = len16;
}
static inline int
mbuf_eo_tsclk_tsoff(struct mbuf *m)
{
M_ASSERTPKTHDR(m);
return (m->m_pkthdr.PH_loc.eight[3]);
}
static inline void
set_mbuf_eo_tsclk_tsoff(struct mbuf *m, uint8_t tsclk_tsoff)
{
M_ASSERTPKTHDR(m);
m->m_pkthdr.PH_loc.eight[3] = tsclk_tsoff;
}
static inline int
needs_eo(struct cxgbe_snd_tag *cst)
{
return (cst != NULL && cst->type == IF_SND_TAG_TYPE_RATE_LIMIT);
}
#endif
/*
* Try to allocate an mbuf to contain a raw work request. To make it
* easy to construct the work request, don't allocate a chain but a
* single mbuf.
*/
struct mbuf *
alloc_wr_mbuf(int len, int how)
{
struct mbuf *m;
if (len <= MHLEN)
m = m_gethdr(how, MT_DATA);
else if (len <= MCLBYTES)
m = m_getcl(how, MT_DATA, M_PKTHDR);
else
m = NULL;
if (m == NULL)
return (NULL);
m->m_pkthdr.len = len;
m->m_len = len;
set_mbuf_cflags(m, MC_RAW_WR);
set_mbuf_len16(m, howmany(len, 16));
return (m);
}
static inline bool
needs_hwcsum(struct mbuf *m)
{
const uint32_t csum_flags = CSUM_IP | CSUM_IP_UDP | CSUM_IP_TCP |
CSUM_IP_TSO | CSUM_INNER_IP | CSUM_INNER_IP_UDP |
CSUM_INNER_IP_TCP | CSUM_INNER_IP_TSO | CSUM_IP6_UDP |
CSUM_IP6_TCP | CSUM_IP6_TSO | CSUM_INNER_IP6_UDP |
CSUM_INNER_IP6_TCP | CSUM_INNER_IP6_TSO;
M_ASSERTPKTHDR(m);
return (m->m_pkthdr.csum_flags & csum_flags);
}
static inline bool
needs_tso(struct mbuf *m)
{
const uint32_t csum_flags = CSUM_IP_TSO | CSUM_IP6_TSO |
CSUM_INNER_IP_TSO | CSUM_INNER_IP6_TSO;
M_ASSERTPKTHDR(m);
return (m->m_pkthdr.csum_flags & csum_flags);
}
static inline bool
needs_vxlan_csum(struct mbuf *m)
{
M_ASSERTPKTHDR(m);
return (m->m_pkthdr.csum_flags & CSUM_ENCAP_VXLAN);
}
static inline bool
needs_vxlan_tso(struct mbuf *m)
{
const uint32_t csum_flags = CSUM_ENCAP_VXLAN | CSUM_INNER_IP_TSO |
CSUM_INNER_IP6_TSO;
M_ASSERTPKTHDR(m);
return ((m->m_pkthdr.csum_flags & csum_flags) != 0 &&
(m->m_pkthdr.csum_flags & csum_flags) != CSUM_ENCAP_VXLAN);
}
static inline bool
needs_inner_tcp_csum(struct mbuf *m)
{
const uint32_t csum_flags = CSUM_INNER_IP_TSO | CSUM_INNER_IP6_TSO;
M_ASSERTPKTHDR(m);
return (m->m_pkthdr.csum_flags & csum_flags);
}
static inline bool
needs_l3_csum(struct mbuf *m)
{
const uint32_t csum_flags = CSUM_IP | CSUM_IP_TSO | CSUM_INNER_IP |
CSUM_INNER_IP_TSO;
M_ASSERTPKTHDR(m);
return (m->m_pkthdr.csum_flags & csum_flags);
}
static inline bool
needs_outer_tcp_csum(struct mbuf *m)
{
const uint32_t csum_flags = CSUM_IP_TCP | CSUM_IP_TSO | CSUM_IP6_TCP |
CSUM_IP6_TSO;
M_ASSERTPKTHDR(m);
return (m->m_pkthdr.csum_flags & csum_flags);
}
#ifdef RATELIMIT
static inline bool
needs_outer_l4_csum(struct mbuf *m)
{
const uint32_t csum_flags = CSUM_IP_UDP | CSUM_IP_TCP | CSUM_IP_TSO |
CSUM_IP6_UDP | CSUM_IP6_TCP | CSUM_IP6_TSO;
M_ASSERTPKTHDR(m);
return (m->m_pkthdr.csum_flags & csum_flags);
}
static inline bool
needs_outer_udp_csum(struct mbuf *m)
{
const uint32_t csum_flags = CSUM_IP_UDP | CSUM_IP6_UDP;
M_ASSERTPKTHDR(m);
return (m->m_pkthdr.csum_flags & csum_flags);
}
#endif
static inline bool
needs_vlan_insertion(struct mbuf *m)
{
M_ASSERTPKTHDR(m);
return (m->m_flags & M_VLANTAG);
}
static void *
m_advance(struct mbuf **pm, int *poffset, int len)
{
struct mbuf *m = *pm;
int offset = *poffset;
uintptr_t p = 0;
MPASS(len > 0);
for (;;) {
if (offset + len < m->m_len) {
offset += len;
p = mtod(m, uintptr_t) + offset;
break;
}
len -= m->m_len - offset;
m = m->m_next;
offset = 0;
MPASS(m != NULL);
}
*poffset = offset;
*pm = m;
return ((void *)p);
}
static inline int
count_mbuf_ext_pgs(struct mbuf *m, int skip, vm_paddr_t *nextaddr)
{
vm_paddr_t paddr;
int i, len, off, pglen, pgoff, seglen, segoff;
int nsegs = 0;
M_ASSERTEXTPG(m);
off = mtod(m, vm_offset_t);
len = m->m_len;
off += skip;
len -= skip;
if (m->m_epg_hdrlen != 0) {
if (off >= m->m_epg_hdrlen) {
off -= m->m_epg_hdrlen;
} else {
seglen = m->m_epg_hdrlen - off;
segoff = off;
seglen = min(seglen, len);
off = 0;
len -= seglen;
paddr = pmap_kextract(
(vm_offset_t)&m->m_epg_hdr[segoff]);
if (*nextaddr != paddr)
nsegs++;
*nextaddr = paddr + seglen;
}
}
pgoff = m->m_epg_1st_off;
for (i = 0; i < m->m_epg_npgs && len > 0; i++) {
pglen = m_epg_pagelen(m, i, pgoff);
if (off >= pglen) {
off -= pglen;
pgoff = 0;
continue;
}
seglen = pglen - off;
segoff = pgoff + off;
off = 0;
seglen = min(seglen, len);
len -= seglen;
paddr = m->m_epg_pa[i] + segoff;
if (*nextaddr != paddr)
nsegs++;
*nextaddr = paddr + seglen;
pgoff = 0;
};
if (len != 0) {
seglen = min(len, m->m_epg_trllen - off);
len -= seglen;
paddr = pmap_kextract((vm_offset_t)&m->m_epg_trail[off]);
if (*nextaddr != paddr)
nsegs++;
*nextaddr = paddr + seglen;
}
return (nsegs);
}
/*
* Can deal with empty mbufs in the chain that have m_len = 0, but the chain
* must have at least one mbuf that's not empty. It is possible for this
* routine to return 0 if skip accounts for all the contents of the mbuf chain.
*/
static inline int
count_mbuf_nsegs(struct mbuf *m, int skip, uint8_t *cflags)
{
vm_paddr_t nextaddr, paddr;
vm_offset_t va;
int len, nsegs;
M_ASSERTPKTHDR(m);
MPASS(m->m_pkthdr.len > 0);
MPASS(m->m_pkthdr.len >= skip);
nsegs = 0;
nextaddr = 0;
for (; m; m = m->m_next) {
len = m->m_len;
if (__predict_false(len == 0))
continue;
if (skip >= len) {
skip -= len;
continue;
}
if ((m->m_flags & M_EXTPG) != 0) {
*cflags |= MC_NOMAP;
nsegs += count_mbuf_ext_pgs(m, skip, &nextaddr);
skip = 0;
continue;
}
va = mtod(m, vm_offset_t) + skip;
len -= skip;
skip = 0;
paddr = pmap_kextract(va);
nsegs += sglist_count((void *)(uintptr_t)va, len);
if (paddr == nextaddr)
nsegs--;
nextaddr = pmap_kextract(va + len - 1) + 1;
}
return (nsegs);
}
/*
* The maximum number of segments that can fit in a WR.
*/
static int
max_nsegs_allowed(struct mbuf *m, bool vm_wr)
{
if (vm_wr) {
if (needs_tso(m))
return (TX_SGL_SEGS_VM_TSO);
return (TX_SGL_SEGS_VM);
}
if (needs_tso(m)) {
if (needs_vxlan_tso(m))
return (TX_SGL_SEGS_VXLAN_TSO);
else
return (TX_SGL_SEGS_TSO);
}
return (TX_SGL_SEGS);
}
/*
* Analyze the mbuf to determine its tx needs. The mbuf passed in may change:
* a) caller can assume it's been freed if this function returns with an error.
* b) it may get defragged up if the gather list is too long for the hardware.
*/
int
parse_pkt(struct mbuf **mp, bool vm_wr)
{
struct mbuf *m0 = *mp, *m;
int rc, nsegs, defragged = 0, offset;
struct ether_header *eh;
void *l3hdr;
#if defined(INET) || defined(INET6)
struct tcphdr *tcp;
#endif
#if defined(KERN_TLS) || defined(RATELIMIT)
struct cxgbe_snd_tag *cst;
#endif
uint16_t eh_type;
uint8_t cflags;
cflags = 0;
M_ASSERTPKTHDR(m0);
if (__predict_false(m0->m_pkthdr.len < ETHER_HDR_LEN)) {
rc = EINVAL;
fail:
m_freem(m0);
*mp = NULL;
return (rc);
}
restart:
/*
* First count the number of gather list segments in the payload.
* Defrag the mbuf if nsegs exceeds the hardware limit.
*/
M_ASSERTPKTHDR(m0);
MPASS(m0->m_pkthdr.len > 0);
nsegs = count_mbuf_nsegs(m0, 0, &cflags);
#if defined(KERN_TLS) || defined(RATELIMIT)
if (m0->m_pkthdr.csum_flags & CSUM_SND_TAG)
cst = mst_to_cst(m0->m_pkthdr.snd_tag);
else
cst = NULL;
#endif
#ifdef KERN_TLS
if (cst != NULL && cst->type == IF_SND_TAG_TYPE_TLS) {
int len16;
cflags |= MC_TLS;
set_mbuf_cflags(m0, cflags);
rc = t6_ktls_parse_pkt(m0, &nsegs, &len16);
if (rc != 0)
goto fail;
set_mbuf_nsegs(m0, nsegs);
set_mbuf_len16(m0, len16);
return (0);
}
#endif
if (nsegs > max_nsegs_allowed(m0, vm_wr)) {
if (defragged++ > 0) {
rc = EFBIG;
goto fail;
}
counter_u64_add(defrags, 1);
if ((m = m_defrag(m0, M_NOWAIT)) == NULL) {
rc = ENOMEM;
goto fail;
}
*mp = m0 = m; /* update caller's copy after defrag */
goto restart;
}
if (__predict_false(nsegs > 2 && m0->m_pkthdr.len <= MHLEN &&
!(cflags & MC_NOMAP))) {
counter_u64_add(pullups, 1);
m0 = m_pullup(m0, m0->m_pkthdr.len);
if (m0 == NULL) {
/* Should have left well enough alone. */
rc = EFBIG;
goto fail;
}
*mp = m0; /* update caller's copy after pullup */
goto restart;
}
set_mbuf_nsegs(m0, nsegs);
set_mbuf_cflags(m0, cflags);
calculate_mbuf_len16(m0, vm_wr);
#ifdef RATELIMIT
/*
* Ethofld is limited to TCP and UDP for now, and only when L4 hw
* checksumming is enabled. needs_outer_l4_csum happens to check for
* all the right things.
*/
if (__predict_false(needs_eo(cst) && !needs_outer_l4_csum(m0))) {
m_snd_tag_rele(m0->m_pkthdr.snd_tag);
m0->m_pkthdr.snd_tag = NULL;
m0->m_pkthdr.csum_flags &= ~CSUM_SND_TAG;
cst = NULL;
}
#endif
if (!needs_hwcsum(m0)
#ifdef RATELIMIT
&& !needs_eo(cst)
#endif
)
return (0);
m = m0;
eh = mtod(m, struct ether_header *);
eh_type = ntohs(eh->ether_type);
if (eh_type == ETHERTYPE_VLAN) {
struct ether_vlan_header *evh = (void *)eh;
eh_type = ntohs(evh->evl_proto);
m0->m_pkthdr.l2hlen = sizeof(*evh);
} else
m0->m_pkthdr.l2hlen = sizeof(*eh);
offset = 0;
l3hdr = m_advance(&m, &offset, m0->m_pkthdr.l2hlen);
switch (eh_type) {
#ifdef INET6
case ETHERTYPE_IPV6:
m0->m_pkthdr.l3hlen = sizeof(struct ip6_hdr);
break;
#endif
#ifdef INET
case ETHERTYPE_IP:
{
struct ip *ip = l3hdr;
if (needs_vxlan_csum(m0)) {
/* Driver will do the outer IP hdr checksum. */
ip->ip_sum = 0;
if (needs_vxlan_tso(m0)) {
const uint16_t ipl = ip->ip_len;
ip->ip_len = 0;
ip->ip_sum = ~in_cksum_hdr(ip);
ip->ip_len = ipl;
} else
ip->ip_sum = in_cksum_hdr(ip);
}
m0->m_pkthdr.l3hlen = ip->ip_hl << 2;
break;
}
#endif
default:
panic("%s: ethertype 0x%04x unknown. if_cxgbe must be compiled"
" with the same INET/INET6 options as the kernel.",
__func__, eh_type);
}
if (needs_vxlan_csum(m0)) {
m0->m_pkthdr.l4hlen = sizeof(struct udphdr);
m0->m_pkthdr.l5hlen = sizeof(struct vxlan_header);
/* Inner headers. */
eh = m_advance(&m, &offset, m0->m_pkthdr.l3hlen +
sizeof(struct udphdr) + sizeof(struct vxlan_header));
eh_type = ntohs(eh->ether_type);
if (eh_type == ETHERTYPE_VLAN) {
struct ether_vlan_header *evh = (void *)eh;
eh_type = ntohs(evh->evl_proto);
m0->m_pkthdr.inner_l2hlen = sizeof(*evh);
} else
m0->m_pkthdr.inner_l2hlen = sizeof(*eh);
l3hdr = m_advance(&m, &offset, m0->m_pkthdr.inner_l2hlen);
switch (eh_type) {
#ifdef INET6
case ETHERTYPE_IPV6:
m0->m_pkthdr.inner_l3hlen = sizeof(struct ip6_hdr);
break;
#endif
#ifdef INET
case ETHERTYPE_IP:
{
struct ip *ip = l3hdr;
m0->m_pkthdr.inner_l3hlen = ip->ip_hl << 2;
break;
}
#endif
default:
panic("%s: VXLAN hw offload requested with unknown "
"ethertype 0x%04x. if_cxgbe must be compiled"
" with the same INET/INET6 options as the kernel.",
__func__, eh_type);
}
#if defined(INET) || defined(INET6)
if (needs_inner_tcp_csum(m0)) {
tcp = m_advance(&m, &offset, m0->m_pkthdr.inner_l3hlen);
m0->m_pkthdr.inner_l4hlen = tcp->th_off * 4;
}
#endif
MPASS((m0->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
m0->m_pkthdr.csum_flags &= CSUM_INNER_IP6_UDP |
CSUM_INNER_IP6_TCP | CSUM_INNER_IP6_TSO | CSUM_INNER_IP |
CSUM_INNER_IP_UDP | CSUM_INNER_IP_TCP | CSUM_INNER_IP_TSO |
CSUM_ENCAP_VXLAN;
}
#if defined(INET) || defined(INET6)
if (needs_outer_tcp_csum(m0)) {
tcp = m_advance(&m, &offset, m0->m_pkthdr.l3hlen);
m0->m_pkthdr.l4hlen = tcp->th_off * 4;
#ifdef RATELIMIT
if (tsclk >= 0 && *(uint32_t *)(tcp + 1) == ntohl(0x0101080a)) {
set_mbuf_eo_tsclk_tsoff(m0,
V_FW_ETH_TX_EO_WR_TSCLK(tsclk) |
V_FW_ETH_TX_EO_WR_TSOFF(sizeof(*tcp) / 2 + 1));
} else
set_mbuf_eo_tsclk_tsoff(m0, 0);
} else if (needs_outer_udp_csum(m0)) {
m0->m_pkthdr.l4hlen = sizeof(struct udphdr);
#endif
}
#ifdef RATELIMIT
if (needs_eo(cst)) {
u_int immhdrs;
/* EO WRs have the headers in the WR and not the GL. */
immhdrs = m0->m_pkthdr.l2hlen + m0->m_pkthdr.l3hlen +
m0->m_pkthdr.l4hlen;
cflags = 0;
nsegs = count_mbuf_nsegs(m0, immhdrs, &cflags);
MPASS(cflags == mbuf_cflags(m0));
set_mbuf_eo_nsegs(m0, nsegs);
set_mbuf_eo_len16(m0,
txpkt_eo_len16(nsegs, immhdrs, needs_tso(m0)));
}
#endif
#endif
MPASS(m0 == *mp);
return (0);
}
void *
start_wrq_wr(struct sge_wrq *wrq, int len16, struct wrq_cookie *cookie)
{
struct sge_eq *eq = &wrq->eq;
struct adapter *sc = wrq->adapter;
int ndesc, available;
struct wrqe *wr;
void *w;
MPASS(len16 > 0);
ndesc = tx_len16_to_desc(len16);
MPASS(ndesc > 0 && ndesc <= SGE_MAX_WR_NDESC);
EQ_LOCK(eq);
if (TAILQ_EMPTY(&wrq->incomplete_wrs) && !STAILQ_EMPTY(&wrq->wr_list))
drain_wrq_wr_list(sc, wrq);
if (!STAILQ_EMPTY(&wrq->wr_list)) {
slowpath:
EQ_UNLOCK(eq);
wr = alloc_wrqe(len16 * 16, wrq);
if (__predict_false(wr == NULL))
return (NULL);
cookie->pidx = -1;
cookie->ndesc = ndesc;
return (&wr->wr);
}
eq->cidx = read_hw_cidx(eq);
if (eq->pidx == eq->cidx)
available = eq->sidx - 1;
else
available = IDXDIFF(eq->cidx, eq->pidx, eq->sidx) - 1;
if (available < ndesc)
goto slowpath;
cookie->pidx = eq->pidx;
cookie->ndesc = ndesc;
TAILQ_INSERT_TAIL(&wrq->incomplete_wrs, cookie, link);
w = &eq->desc[eq->pidx];
IDXINCR(eq->pidx, ndesc, eq->sidx);
if (__predict_false(cookie->pidx + ndesc > eq->sidx)) {
w = &wrq->ss[0];
wrq->ss_pidx = cookie->pidx;
wrq->ss_len = len16 * 16;
}
EQ_UNLOCK(eq);
return (w);
}
void
commit_wrq_wr(struct sge_wrq *wrq, void *w, struct wrq_cookie *cookie)
{
struct sge_eq *eq = &wrq->eq;
struct adapter *sc = wrq->adapter;
int ndesc, pidx;
struct wrq_cookie *prev, *next;
if (cookie->pidx == -1) {
struct wrqe *wr = __containerof(w, struct wrqe, wr);
t4_wrq_tx(sc, wr);
return;
}
if (__predict_false(w == &wrq->ss[0])) {
int n = (eq->sidx - wrq->ss_pidx) * EQ_ESIZE;
MPASS(wrq->ss_len > n); /* WR had better wrap around. */
bcopy(&wrq->ss[0], &eq->desc[wrq->ss_pidx], n);
bcopy(&wrq->ss[n], &eq->desc[0], wrq->ss_len - n);
wrq->tx_wrs_ss++;
} else
wrq->tx_wrs_direct++;
EQ_LOCK(eq);
ndesc = cookie->ndesc; /* Can be more than SGE_MAX_WR_NDESC here. */
pidx = cookie->pidx;
MPASS(pidx >= 0 && pidx < eq->sidx);
prev = TAILQ_PREV(cookie, wrq_incomplete_wrs, link);
next = TAILQ_NEXT(cookie, link);
if (prev == NULL) {
MPASS(pidx == eq->dbidx);
if (next == NULL || ndesc >= 16) {
int available;
struct fw_eth_tx_pkt_wr *dst; /* any fw WR struct will do */
/*
* Note that the WR via which we'll request tx updates
* is at pidx and not eq->pidx, which has moved on
* already.
*/
dst = (void *)&eq->desc[pidx];
available = IDXDIFF(eq->cidx, eq->pidx, eq->sidx) - 1;
if (available < eq->sidx / 4 &&
atomic_cmpset_int(&eq->equiq, 0, 1)) {
/*
* XXX: This is not 100% reliable with some
* types of WRs. But this is a very unusual
* situation for an ofld/ctrl queue anyway.
*/
dst->equiq_to_len16 |= htobe32(F_FW_WR_EQUIQ |
F_FW_WR_EQUEQ);
}
ring_eq_db(wrq->adapter, eq, ndesc);
} else {
MPASS(IDXDIFF(next->pidx, pidx, eq->sidx) == ndesc);
next->pidx = pidx;
next->ndesc += ndesc;
}
} else {
MPASS(IDXDIFF(pidx, prev->pidx, eq->sidx) == prev->ndesc);
prev->ndesc += ndesc;
}
TAILQ_REMOVE(&wrq->incomplete_wrs, cookie, link);
if (TAILQ_EMPTY(&wrq->incomplete_wrs) && !STAILQ_EMPTY(&wrq->wr_list))
drain_wrq_wr_list(sc, wrq);
#ifdef INVARIANTS
if (TAILQ_EMPTY(&wrq->incomplete_wrs)) {
/* Doorbell must have caught up to the pidx. */
MPASS(wrq->eq.pidx == wrq->eq.dbidx);
}
#endif
EQ_UNLOCK(eq);
}
static u_int
can_resume_eth_tx(struct mp_ring *r)
{
struct sge_eq *eq = r->cookie;
return (total_available_tx_desc(eq) > eq->sidx / 8);
}
static inline bool
cannot_use_txpkts(struct mbuf *m)
{
/* maybe put a GL limit too, to avoid silliness? */
return (needs_tso(m) || (mbuf_cflags(m) & (MC_RAW_WR | MC_TLS)) != 0);
}
static inline int
discard_tx(struct sge_eq *eq)
{
return ((eq->flags & (EQ_ENABLED | EQ_QFLUSH)) != EQ_ENABLED);
}
static inline int
wr_can_update_eq(void *p)
{
struct fw_eth_tx_pkts_wr *wr = p;
switch (G_FW_WR_OP(be32toh(wr->op_pkd))) {
case FW_ULPTX_WR:
case FW_ETH_TX_PKT_WR:
case FW_ETH_TX_PKTS_WR:
case FW_ETH_TX_PKTS2_WR:
case FW_ETH_TX_PKT_VM_WR:
case FW_ETH_TX_PKTS_VM_WR:
return (1);
default:
return (0);
}
}
static inline void
set_txupdate_flags(struct sge_txq *txq, u_int avail,
struct fw_eth_tx_pkt_wr *wr)
{
struct sge_eq *eq = &txq->eq;
struct txpkts *txp = &txq->txp;
if ((txp->npkt > 0 || avail < eq->sidx / 2) &&
atomic_cmpset_int(&eq->equiq, 0, 1)) {
wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ | F_FW_WR_EQUIQ);
eq->equeqidx = eq->pidx;
} else if (IDXDIFF(eq->pidx, eq->equeqidx, eq->sidx) >= 32) {
wr->equiq_to_len16 |= htobe32(F_FW_WR_EQUEQ);
eq->equeqidx = eq->pidx;
}
}
/*
* r->items[cidx] to r->items[pidx], with a wraparound at r->size, are ready to
* be consumed. Return the actual number consumed. 0 indicates a stall.
*/
static u_int
eth_tx(struct mp_ring *r, u_int cidx, u_int pidx, bool *coalescing)
{
struct sge_txq *txq = r->cookie;
struct ifnet *ifp = txq->ifp;
struct sge_eq *eq = &txq->eq;
struct txpkts *txp = &txq->txp;
struct vi_info *vi = ifp->if_softc;
struct adapter *sc = vi->adapter;
u_int total, remaining; /* # of packets */
u_int n, avail, dbdiff; /* # of hardware descriptors */
int i, rc;
struct mbuf *m0;
bool snd;
void *wr; /* start of the last WR written to the ring */
TXQ_LOCK_ASSERT_OWNED(txq);
remaining = IDXDIFF(pidx, cidx, r->size);
if (__predict_false(discard_tx(eq))) {
for (i = 0; i < txp->npkt; i++)
m_freem(txp->mb[i]);
txp->npkt = 0;
while (cidx != pidx) {
m0 = r->items[cidx];
m_freem(m0);
if (++cidx == r->size)
cidx = 0;
}
reclaim_tx_descs(txq, eq->sidx);
*coalescing = false;
return (remaining); /* emptied */
}
/* How many hardware descriptors do we have readily available. */
if (eq->pidx == eq->cidx) {
avail = eq->sidx - 1;
if (txp->score++ >= 5)
txp->score = 5; /* tx is completely idle, reset. */
} else
avail = IDXDIFF(eq->cidx, eq->pidx, eq->sidx) - 1;
total = 0;
if (remaining == 0) {
if (txp->score-- == 1) /* egr_update had to drain txpkts */
txp->score = 1;
goto send_txpkts;
}
dbdiff = 0;
MPASS(remaining > 0);
while (remaining > 0) {
m0 = r->items[cidx];
M_ASSERTPKTHDR(m0);
MPASS(m0->m_nextpkt == NULL);
if (avail < 2 * SGE_MAX_WR_NDESC)
avail += reclaim_tx_descs(txq, 64);
if (txp->npkt > 0 || remaining > 1 || txp->score > 3 ||
atomic_load_int(&txq->eq.equiq) != 0) {
if (vi->flags & TX_USES_VM_WR)
rc = add_to_txpkts_vf(sc, txq, m0, avail, &snd);
else
rc = add_to_txpkts_pf(sc, txq, m0, avail, &snd);
} else {
snd = false;
rc = EINVAL;
}
if (snd) {
MPASS(txp->npkt > 0);
for (i = 0; i < txp->npkt; i++)
ETHER_BPF_MTAP(ifp, txp->mb[i]);
if (txp->npkt > 1) {
if (txp->score++ >= 10)
txp->score = 10;
MPASS(avail >= tx_len16_to_desc(txp->len16));
if (vi->flags & TX_USES_VM_WR)
n = write_txpkts_vm_wr(sc, txq);
else
n = write_txpkts_wr(sc, txq);
} else {
MPASS(avail >=
tx_len16_to_desc(mbuf_len16(txp->mb[0])));
if (vi->flags & TX_USES_VM_WR)
n = write_txpkt_vm_wr(sc, txq,
txp->mb[0]);
else
n = write_txpkt_wr(sc, txq, txp->mb[0],
avail);
}
MPASS(n <= SGE_MAX_WR_NDESC);
avail -= n;
dbdiff += n;
wr = &eq->desc[eq->pidx];
IDXINCR(eq->pidx, n, eq->sidx);
txp->npkt = 0; /* emptied */
}
if (rc == 0) {
/* m0 was coalesced into txq->txpkts. */
goto next_mbuf;
}
if (rc == EAGAIN) {
/*
* m0 is suitable for tx coalescing but could not be
* combined with the existing txq->txpkts, which has now
* been transmitted. Start a new txpkts with m0.
*/
MPASS(snd);
MPASS(txp->npkt == 0);
continue;
}
MPASS(rc != 0 && rc != EAGAIN);
MPASS(txp->npkt == 0);
n = tx_len16_to_desc(mbuf_len16(m0));
if (__predict_false(avail < n)) {
avail += reclaim_tx_descs(txq, min(n, 32));
if (avail < n)
break; /* out of descriptors */
}
wr = &eq->desc[eq->pidx];
if (mbuf_cflags(m0) & MC_RAW_WR) {
n = write_raw_wr(txq, wr, m0, avail);
#ifdef KERN_TLS
} else if (mbuf_cflags(m0) & MC_TLS) {
ETHER_BPF_MTAP(ifp, m0);
n = t6_ktls_write_wr(txq, wr, m0, mbuf_nsegs(m0),
avail);
#endif
} else {
ETHER_BPF_MTAP(ifp, m0);
if (vi->flags & TX_USES_VM_WR)
n = write_txpkt_vm_wr(sc, txq, m0);
else
n = write_txpkt_wr(sc, txq, m0, avail);
}
MPASS(n >= 1 && n <= avail);
if (!(mbuf_cflags(m0) & MC_TLS))
MPASS(n <= SGE_MAX_WR_NDESC);
avail -= n;
dbdiff += n;
IDXINCR(eq->pidx, n, eq->sidx);
if (dbdiff >= 512 / EQ_ESIZE) { /* X_FETCHBURSTMAX_512B */
if (wr_can_update_eq(wr))
set_txupdate_flags(txq, avail, wr);
ring_eq_db(sc, eq, dbdiff);
avail += reclaim_tx_descs(txq, 32);
dbdiff = 0;
}
next_mbuf:
total++;
remaining--;
if (__predict_false(++cidx == r->size))
cidx = 0;
}
if (dbdiff != 0) {
if (wr_can_update_eq(wr))
set_txupdate_flags(txq, avail, wr);
ring_eq_db(sc, eq, dbdiff);
reclaim_tx_descs(txq, 32);
} else if (eq->pidx == eq->cidx && txp->npkt > 0 &&
atomic_load_int(&txq->eq.equiq) == 0) {
/*
* If nothing was submitted to the chip for tx (it was coalesced
* into txpkts instead) and there is no tx update outstanding
* then we need to send txpkts now.
*/
send_txpkts:
MPASS(txp->npkt > 0);
for (i = 0; i < txp->npkt; i++)
ETHER_BPF_MTAP(ifp, txp->mb[i]);
if (txp->npkt > 1) {
MPASS(avail >= tx_len16_to_desc(txp->len16));
if (vi->flags & TX_USES_VM_WR)
n = write_txpkts_vm_wr(sc, txq);
else
n = write_txpkts_wr(sc, txq);
} else {
MPASS(avail >=
tx_len16_to_desc(mbuf_len16(txp->mb[0])));
if (vi->flags & TX_USES_VM_WR)
n = write_txpkt_vm_wr(sc, txq, txp->mb[0]);
else
n = write_txpkt_wr(sc, txq, txp->mb[0], avail);
}
MPASS(n <= SGE_MAX_WR_NDESC);
wr = &eq->desc[eq->pidx];
IDXINCR(eq->pidx, n, eq->sidx);
txp->npkt = 0; /* emptied */
MPASS(wr_can_update_eq(wr));
set_txupdate_flags(txq, avail - n, wr);
ring_eq_db(sc, eq, n);
reclaim_tx_descs(txq, 32);
}
*coalescing = txp->npkt > 0;
return (total);
}
static inline void
init_iq(struct sge_iq *iq, struct adapter *sc, int tmr_idx, int pktc_idx,
int qsize)
{
KASSERT(tmr_idx >= 0 && tmr_idx < SGE_NTIMERS,
("%s: bad tmr_idx %d", __func__, tmr_idx));
KASSERT(pktc_idx < SGE_NCOUNTERS, /* -ve is ok, means don't use */
("%s: bad pktc_idx %d", __func__, pktc_idx));
iq->flags = 0;
iq->adapter = sc;
iq->intr_params = V_QINTR_TIMER_IDX(tmr_idx);
iq->intr_pktc_idx = SGE_NCOUNTERS - 1;
if (pktc_idx >= 0) {
iq->intr_params |= F_QINTR_CNT_EN;
iq->intr_pktc_idx = pktc_idx;
}
iq->qsize = roundup2(qsize, 16); /* See FW_IQ_CMD/iqsize */
iq->sidx = iq->qsize - sc->params.sge.spg_len / IQ_ESIZE;
}
static inline void
init_fl(struct adapter *sc, struct sge_fl *fl, int qsize, int maxp, char *name)
{
fl->qsize = qsize;
fl->sidx = qsize - sc->params.sge.spg_len / EQ_ESIZE;
strlcpy(fl->lockname, name, sizeof(fl->lockname));
if (sc->flags & BUF_PACKING_OK &&
((!is_t4(sc) && buffer_packing) || /* T5+: enabled unless 0 */
(is_t4(sc) && buffer_packing == 1)))/* T4: disabled unless 1 */
fl->flags |= FL_BUF_PACKING;
fl->zidx = find_refill_source(sc, maxp, fl->flags & FL_BUF_PACKING);
fl->safe_zidx = sc->sge.safe_zidx;
}
static inline void
init_eq(struct adapter *sc, struct sge_eq *eq, int eqtype, int qsize,
uint8_t tx_chan, uint16_t iqid, char *name)
{
KASSERT(eqtype <= EQ_TYPEMASK, ("%s: bad qtype %d", __func__, eqtype));
eq->flags = eqtype & EQ_TYPEMASK;
eq->tx_chan = tx_chan;
eq->iqid = iqid;
eq->sidx = qsize - sc->params.sge.spg_len / EQ_ESIZE;
strlcpy(eq->lockname, name, sizeof(eq->lockname));
}
static int
alloc_ring(struct adapter *sc, size_t len, bus_dma_tag_t *tag,
bus_dmamap_t *map, bus_addr_t *pa, void **va)
{
int rc;
rc = bus_dma_tag_create(sc->dmat, 512, 0, BUS_SPACE_MAXADDR,
BUS_SPACE_MAXADDR, NULL, NULL, len, 1, len, 0, NULL, NULL, tag);
if (rc != 0) {
device_printf(sc->dev, "cannot allocate DMA tag: %d\n", rc);
goto done;
}
rc = bus_dmamem_alloc(*tag, va,
BUS_DMA_WAITOK | BUS_DMA_COHERENT | BUS_DMA_ZERO, map);
if (rc != 0) {
device_printf(sc->dev, "cannot allocate DMA memory: %d\n", rc);
goto done;
}
rc = bus_dmamap_load(*tag, *map, *va, len, oneseg_dma_callback, pa, 0);
if (rc != 0) {
device_printf(sc->dev, "cannot load DMA map: %d\n", rc);
goto done;
}
done:
if (rc)
free_ring(sc, *tag, *map, *pa, *va);
return (rc);
}
static int
free_ring(struct adapter *sc, bus_dma_tag_t tag, bus_dmamap_t map,
bus_addr_t pa, void *va)
{
if (pa)
bus_dmamap_unload(tag, map);
if (va)
bus_dmamem_free(tag, va, map);
if (tag)
bus_dma_tag_destroy(tag);
return (0);
}
/*
* Allocates the ring for an ingress queue and an optional freelist. If the
* freelist is specified it will be allocated and then associated with the
* ingress queue.
*
* Returns errno on failure. Resources allocated up to that point may still be
* allocated. Caller is responsible for cleanup in case this function fails.
*
* If the ingress queue will take interrupts directly then the intr_idx
* specifies the vector, starting from 0. -1 means the interrupts for this
* queue should be forwarded to the fwq.
*/
static int
alloc_iq_fl(struct vi_info *vi, struct sge_iq *iq, struct sge_fl *fl,
int intr_idx, int cong)
{
int rc, i, cntxt_id;
size_t len;
struct fw_iq_cmd c;
struct port_info *pi = vi->pi;
struct adapter *sc = iq->adapter;
struct sge_params *sp = &sc->params.sge;
__be32 v = 0;
len = iq->qsize * IQ_ESIZE;
rc = alloc_ring(sc, len, &iq->desc_tag, &iq->desc_map, &iq->ba,
(void **)&iq->desc);
if (rc != 0)
return (rc);
bzero(&c, sizeof(c));
c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_IQ_CMD) | F_FW_CMD_REQUEST |
F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_IQ_CMD_PFN(sc->pf) |
V_FW_IQ_CMD_VFN(0));
c.alloc_to_len16 = htobe32(F_FW_IQ_CMD_ALLOC | F_FW_IQ_CMD_IQSTART |
FW_LEN16(c));
/* Special handling for firmware event queue */
if (iq == &sc->sge.fwq)
v |= F_FW_IQ_CMD_IQASYNCH;
if (intr_idx < 0) {
/* Forwarded interrupts, all headed to fwq */
v |= F_FW_IQ_CMD_IQANDST;
v |= V_FW_IQ_CMD_IQANDSTINDEX(sc->sge.fwq.cntxt_id);
} else {
KASSERT(intr_idx < sc->intr_count,
("%s: invalid direct intr_idx %d", __func__, intr_idx));
v |= V_FW_IQ_CMD_IQANDSTINDEX(intr_idx);
}
c.type_to_iqandstindex = htobe32(v |
V_FW_IQ_CMD_TYPE(FW_IQ_TYPE_FL_INT_CAP) |
V_FW_IQ_CMD_VIID(vi->viid) |
V_FW_IQ_CMD_IQANUD(X_UPDATEDELIVERY_INTERRUPT));
c.iqdroprss_to_iqesize = htobe16(V_FW_IQ_CMD_IQPCIECH(pi->tx_chan) |
F_FW_IQ_CMD_IQGTSMODE |
V_FW_IQ_CMD_IQINTCNTTHRESH(iq->intr_pktc_idx) |
V_FW_IQ_CMD_IQESIZE(ilog2(IQ_ESIZE) - 4));
c.iqsize = htobe16(iq->qsize);
c.iqaddr = htobe64(iq->ba);
if (cong >= 0)
c.iqns_to_fl0congen = htobe32(F_FW_IQ_CMD_IQFLINTCONGEN);
if (fl) {
mtx_init(&fl->fl_lock, fl->lockname, NULL, MTX_DEF);
len = fl->qsize * EQ_ESIZE;
rc = alloc_ring(sc, len, &fl->desc_tag, &fl->desc_map,
&fl->ba, (void **)&fl->desc);
if (rc)
return (rc);
/* Allocate space for one software descriptor per buffer. */
rc = alloc_fl_sdesc(fl);
if (rc != 0) {
device_printf(sc->dev,
"failed to setup fl software descriptors: %d\n",
rc);
return (rc);
}
if (fl->flags & FL_BUF_PACKING) {
fl->lowat = roundup2(sp->fl_starve_threshold2, 8);
fl->buf_boundary = sp->pack_boundary;
} else {
fl->lowat = roundup2(sp->fl_starve_threshold, 8);
fl->buf_boundary = 16;
}
if (fl_pad && fl->buf_boundary < sp->pad_boundary)
fl->buf_boundary = sp->pad_boundary;
c.iqns_to_fl0congen |=
htobe32(V_FW_IQ_CMD_FL0HOSTFCMODE(X_HOSTFCMODE_NONE) |
F_FW_IQ_CMD_FL0FETCHRO | F_FW_IQ_CMD_FL0DATARO |
(fl_pad ? F_FW_IQ_CMD_FL0PADEN : 0) |
(fl->flags & FL_BUF_PACKING ? F_FW_IQ_CMD_FL0PACKEN :
0));
if (cong >= 0) {
c.iqns_to_fl0congen |=
htobe32(V_FW_IQ_CMD_FL0CNGCHMAP(cong) |
F_FW_IQ_CMD_FL0CONGCIF |
F_FW_IQ_CMD_FL0CONGEN);
}
c.fl0dcaen_to_fl0cidxfthresh =
htobe16(V_FW_IQ_CMD_FL0FBMIN(chip_id(sc) <= CHELSIO_T5 ?
X_FETCHBURSTMIN_128B : X_FETCHBURSTMIN_64B_T6) |
V_FW_IQ_CMD_FL0FBMAX(chip_id(sc) <= CHELSIO_T5 ?
X_FETCHBURSTMAX_512B : X_FETCHBURSTMAX_256B));
c.fl0size = htobe16(fl->qsize);
c.fl0addr = htobe64(fl->ba);
}
rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c);
if (rc != 0) {
device_printf(sc->dev,
"failed to create ingress queue: %d\n", rc);
return (rc);
}
iq->cidx = 0;
iq->gen = F_RSPD_GEN;
iq->intr_next = iq->intr_params;
iq->cntxt_id = be16toh(c.iqid);
iq->abs_id = be16toh(c.physiqid);
iq->flags |= IQ_ALLOCATED;
cntxt_id = iq->cntxt_id - sc->sge.iq_start;
if (cntxt_id >= sc->sge.niq) {
panic ("%s: iq->cntxt_id (%d) more than the max (%d)", __func__,
cntxt_id, sc->sge.niq - 1);
}
sc->sge.iqmap[cntxt_id] = iq;
if (fl) {
u_int qid;
iq->flags |= IQ_HAS_FL;
fl->cntxt_id = be16toh(c.fl0id);
fl->pidx = fl->cidx = 0;
cntxt_id = fl->cntxt_id - sc->sge.eq_start;
if (cntxt_id >= sc->sge.neq) {
panic("%s: fl->cntxt_id (%d) more than the max (%d)",
__func__, cntxt_id, sc->sge.neq - 1);
}
sc->sge.eqmap[cntxt_id] = (void *)fl;
qid = fl->cntxt_id;
if (isset(&sc->doorbells, DOORBELL_UDB)) {
uint32_t s_qpp = sc->params.sge.eq_s_qpp;
uint32_t mask = (1 << s_qpp) - 1;
volatile uint8_t *udb;
udb = sc->udbs_base + UDBS_DB_OFFSET;
udb += (qid >> s_qpp) << PAGE_SHIFT;
qid &= mask;
if (qid < PAGE_SIZE / UDBS_SEG_SIZE) {
udb += qid << UDBS_SEG_SHIFT;
qid = 0;
}
fl->udb = (volatile void *)udb;
}
fl->dbval = V_QID(qid) | sc->chip_params->sge_fl_db;
FL_LOCK(fl);
/* Enough to make sure the SGE doesn't think it's starved */
refill_fl(sc, fl, fl->lowat);
FL_UNLOCK(fl);
}
if (chip_id(sc) >= CHELSIO_T5 && !(sc->flags & IS_VF) && cong >= 0) {
uint32_t param, val;
param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) |
V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_CONM_CTXT) |
V_FW_PARAMS_PARAM_YZ(iq->cntxt_id);
if (cong == 0)
val = 1 << 19;
else {
val = 2 << 19;
for (i = 0; i < 4; i++) {
if (cong & (1 << i))
val |= 1 << (i << 2);
}
}
rc = -t4_set_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);
if (rc != 0) {
/* report error but carry on */
device_printf(sc->dev,
"failed to set congestion manager context for "
"ingress queue %d: %d\n", iq->cntxt_id, rc);
}
}
/* Enable IQ interrupts */
atomic_store_rel_int(&iq->state, IQS_IDLE);
t4_write_reg(sc, sc->sge_gts_reg, V_SEINTARM(iq->intr_params) |
V_INGRESSQID(iq->cntxt_id));
return (0);
}
static int
free_iq_fl(struct vi_info *vi, struct sge_iq *iq, struct sge_fl *fl)
{
int rc;
struct adapter *sc = iq->adapter;
device_t dev;
if (sc == NULL)
return (0); /* nothing to do */
dev = vi ? vi->dev : sc->dev;
if (iq->flags & IQ_ALLOCATED) {
rc = -t4_iq_free(sc, sc->mbox, sc->pf, 0,
FW_IQ_TYPE_FL_INT_CAP, iq->cntxt_id,
fl ? fl->cntxt_id : 0xffff, 0xffff);
if (rc != 0) {
device_printf(dev,
"failed to free queue %p: %d\n", iq, rc);
return (rc);
}
iq->flags &= ~IQ_ALLOCATED;
}
free_ring(sc, iq->desc_tag, iq->desc_map, iq->ba, iq->desc);
bzero(iq, sizeof(*iq));
if (fl) {
free_ring(sc, fl->desc_tag, fl->desc_map, fl->ba,
fl->desc);
if (fl->sdesc)
free_fl_sdesc(sc, fl);
if (mtx_initialized(&fl->fl_lock))
mtx_destroy(&fl->fl_lock);
bzero(fl, sizeof(*fl));
}
return (0);
}
static void
add_iq_sysctls(struct sysctl_ctx_list *ctx, struct sysctl_oid *oid,
struct sge_iq *iq)
{
struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid);
SYSCTL_ADD_UAUTO(ctx, children, OID_AUTO, "ba", CTLFLAG_RD, &iq->ba,
"bus address of descriptor ring");
SYSCTL_ADD_INT(ctx, children, OID_AUTO, "dmalen", CTLFLAG_RD, NULL,
iq->qsize * IQ_ESIZE, "descriptor ring size in bytes");
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "abs_id",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &iq->abs_id, 0,
sysctl_uint16, "I", "absolute id of the queue");
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cntxt_id",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &iq->cntxt_id, 0,
sysctl_uint16, "I", "SGE context id of the queue");
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cidx",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &iq->cidx, 0,
sysctl_uint16, "I", "consumer index");
}
static void
add_fl_sysctls(struct adapter *sc, struct sysctl_ctx_list *ctx,
struct sysctl_oid *oid, struct sge_fl *fl)
{
struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid);
oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, "fl",
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "freelist");
children = SYSCTL_CHILDREN(oid);
SYSCTL_ADD_UAUTO(ctx, children, OID_AUTO, "ba", CTLFLAG_RD,
&fl->ba, "bus address of descriptor ring");
SYSCTL_ADD_INT(ctx, children, OID_AUTO, "dmalen", CTLFLAG_RD, NULL,
fl->sidx * EQ_ESIZE + sc->params.sge.spg_len,
"desc ring size in bytes");
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cntxt_id",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &fl->cntxt_id, 0,
sysctl_uint16, "I", "SGE context id of the freelist");
SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "padding", CTLFLAG_RD, NULL,
fl_pad ? 1 : 0, "padding enabled");
SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "packing", CTLFLAG_RD, NULL,
fl->flags & FL_BUF_PACKING ? 1 : 0, "packing enabled");
SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "cidx", CTLFLAG_RD, &fl->cidx,
0, "consumer index");
if (fl->flags & FL_BUF_PACKING) {
SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "rx_offset",
CTLFLAG_RD, &fl->rx_offset, 0, "packing rx offset");
}
SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "pidx", CTLFLAG_RD, &fl->pidx,
0, "producer index");
SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "cluster_allocated",
CTLFLAG_RD, &fl->cl_allocated, "# of clusters allocated");
SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "cluster_recycled",
CTLFLAG_RD, &fl->cl_recycled, "# of clusters recycled");
SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "cluster_fast_recycled",
CTLFLAG_RD, &fl->cl_fast_recycled, "# of clusters recycled (fast)");
}
static int
alloc_fwq(struct adapter *sc)
{
int rc, intr_idx;
struct sge_iq *fwq = &sc->sge.fwq;
struct sysctl_oid *oid = device_get_sysctl_tree(sc->dev);
struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid);
init_iq(fwq, sc, 0, 0, FW_IQ_QSIZE);
if (sc->flags & IS_VF)
intr_idx = 0;
else
intr_idx = sc->intr_count > 1 ? 1 : 0;
rc = alloc_iq_fl(&sc->port[0]->vi[0], fwq, NULL, intr_idx, -1);
if (rc != 0) {
device_printf(sc->dev,
"failed to create firmware event queue: %d\n", rc);
return (rc);
}
oid = SYSCTL_ADD_NODE(&sc->ctx, children, OID_AUTO, "fwq",
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "firmware event queue");
add_iq_sysctls(&sc->ctx, oid, fwq);
return (0);
}
static int
free_fwq(struct adapter *sc)
{
return free_iq_fl(NULL, &sc->sge.fwq, NULL);
}
static int
alloc_ctrlq(struct adapter *sc, struct sge_wrq *ctrlq, int idx,
struct sysctl_oid *oid)
{
int rc;
char name[16];
struct sysctl_oid_list *children;
snprintf(name, sizeof(name), "%s ctrlq%d", device_get_nameunit(sc->dev),
idx);
init_eq(sc, &ctrlq->eq, EQ_CTRL, CTRL_EQ_QSIZE, sc->port[idx]->tx_chan,
sc->sge.fwq.cntxt_id, name);
children = SYSCTL_CHILDREN(oid);
snprintf(name, sizeof(name), "%d", idx);
oid = SYSCTL_ADD_NODE(&sc->ctx, children, OID_AUTO, name,
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "ctrl queue");
rc = alloc_wrq(sc, NULL, ctrlq, oid);
return (rc);
}
int
tnl_cong(struct port_info *pi, int drop)
{
if (drop == -1)
return (-1);
else if (drop == 1)
return (0);
else
return (pi->rx_e_chan_map);
}
static int
alloc_rxq(struct vi_info *vi, struct sge_rxq *rxq, int intr_idx, int idx,
struct sysctl_oid *oid)
{
int rc;
struct adapter *sc = vi->adapter;
struct sysctl_oid_list *children;
char name[16];
rc = alloc_iq_fl(vi, &rxq->iq, &rxq->fl, intr_idx,
tnl_cong(vi->pi, cong_drop));
if (rc != 0)
return (rc);
if (idx == 0)
sc->sge.iq_base = rxq->iq.abs_id - rxq->iq.cntxt_id;
else
KASSERT(rxq->iq.cntxt_id + sc->sge.iq_base == rxq->iq.abs_id,
("iq_base mismatch"));
KASSERT(sc->sge.iq_base == 0 || sc->flags & IS_VF,
("PF with non-zero iq_base"));
/*
* The freelist is just barely above the starvation threshold right now,
* fill it up a bit more.
*/
FL_LOCK(&rxq->fl);
refill_fl(sc, &rxq->fl, 128);
FL_UNLOCK(&rxq->fl);
#if defined(INET) || defined(INET6)
rc = tcp_lro_init_args(&rxq->lro, vi->ifp, lro_entries, lro_mbufs);
if (rc != 0)
return (rc);
MPASS(rxq->lro.ifp == vi->ifp); /* also indicates LRO init'ed */
if (vi->ifp->if_capenable & IFCAP_LRO)
rxq->iq.flags |= IQ_LRO_ENABLED;
#endif
if (vi->ifp->if_capenable & IFCAP_HWRXTSTMP)
rxq->iq.flags |= IQ_RX_TIMESTAMP;
rxq->ifp = vi->ifp;
children = SYSCTL_CHILDREN(oid);
snprintf(name, sizeof(name), "%d", idx);
oid = SYSCTL_ADD_NODE(&vi->ctx, children, OID_AUTO, name,
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "rx queue");
children = SYSCTL_CHILDREN(oid);
add_iq_sysctls(&vi->ctx, oid, &rxq->iq);
#if defined(INET) || defined(INET6)
SYSCTL_ADD_U64(&vi->ctx, children, OID_AUTO, "lro_queued", CTLFLAG_RD,
&rxq->lro.lro_queued, 0, NULL);
SYSCTL_ADD_U64(&vi->ctx, children, OID_AUTO, "lro_flushed", CTLFLAG_RD,
&rxq->lro.lro_flushed, 0, NULL);
#endif
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "rxcsum", CTLFLAG_RD,
&rxq->rxcsum, "# of times hardware assisted with checksum");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "vlan_extraction",
CTLFLAG_RD, &rxq->vlan_extraction,
"# of times hardware extracted 802.1Q tag");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "vxlan_rxcsum",
CTLFLAG_RD, &rxq->vxlan_rxcsum,
"# of times hardware assisted with inner checksum (VXLAN) ");
add_fl_sysctls(sc, &vi->ctx, oid, &rxq->fl);
return (rc);
}
static int
free_rxq(struct vi_info *vi, struct sge_rxq *rxq)
{
int rc;
#if defined(INET) || defined(INET6)
if (rxq->lro.ifp) {
tcp_lro_free(&rxq->lro);
rxq->lro.ifp = NULL;
}
#endif
rc = free_iq_fl(vi, &rxq->iq, &rxq->fl);
if (rc == 0)
bzero(rxq, sizeof(*rxq));
return (rc);
}
#ifdef TCP_OFFLOAD
static int
alloc_ofld_rxq(struct vi_info *vi, struct sge_ofld_rxq *ofld_rxq,
int intr_idx, int idx, struct sysctl_oid *oid)
{
struct port_info *pi = vi->pi;
int rc;
struct sysctl_oid_list *children;
char name[16];
rc = alloc_iq_fl(vi, &ofld_rxq->iq, &ofld_rxq->fl, intr_idx, 0);
if (rc != 0)
return (rc);
children = SYSCTL_CHILDREN(oid);
snprintf(name, sizeof(name), "%d", idx);
oid = SYSCTL_ADD_NODE(&vi->ctx, children, OID_AUTO, name,
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "rx queue");
add_iq_sysctls(&vi->ctx, oid, &ofld_rxq->iq);
add_fl_sysctls(pi->adapter, &vi->ctx, oid, &ofld_rxq->fl);
return (rc);
}
static int
free_ofld_rxq(struct vi_info *vi, struct sge_ofld_rxq *ofld_rxq)
{
int rc;
rc = free_iq_fl(vi, &ofld_rxq->iq, &ofld_rxq->fl);
if (rc == 0)
bzero(ofld_rxq, sizeof(*ofld_rxq));
return (rc);
}
#endif
#ifdef DEV_NETMAP
static int
alloc_nm_rxq(struct vi_info *vi, struct sge_nm_rxq *nm_rxq, int intr_idx,
int idx, struct sysctl_oid *oid)
{
int rc;
struct sysctl_oid_list *children;
struct sysctl_ctx_list *ctx;
char name[16];
size_t len;
struct adapter *sc = vi->adapter;
struct netmap_adapter *na = NA(vi->ifp);
MPASS(na != NULL);
len = vi->qsize_rxq * IQ_ESIZE;
rc = alloc_ring(sc, len, &nm_rxq->iq_desc_tag, &nm_rxq->iq_desc_map,
&nm_rxq->iq_ba, (void **)&nm_rxq->iq_desc);
if (rc != 0)
return (rc);
len = na->num_rx_desc * EQ_ESIZE + sc->params.sge.spg_len;
rc = alloc_ring(sc, len, &nm_rxq->fl_desc_tag, &nm_rxq->fl_desc_map,
&nm_rxq->fl_ba, (void **)&nm_rxq->fl_desc);
if (rc != 0)
return (rc);
nm_rxq->vi = vi;
nm_rxq->nid = idx;
nm_rxq->iq_cidx = 0;
nm_rxq->iq_sidx = vi->qsize_rxq - sc->params.sge.spg_len / IQ_ESIZE;
nm_rxq->iq_gen = F_RSPD_GEN;
nm_rxq->fl_pidx = nm_rxq->fl_cidx = 0;
nm_rxq->fl_sidx = na->num_rx_desc;
nm_rxq->fl_sidx2 = nm_rxq->fl_sidx; /* copy for rxsync cacheline */
nm_rxq->intr_idx = intr_idx;
nm_rxq->iq_cntxt_id = INVALID_NM_RXQ_CNTXT_ID;
ctx = &vi->ctx;
children = SYSCTL_CHILDREN(oid);
snprintf(name, sizeof(name), "%d", idx);
oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, name,
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "rx queue");
children = SYSCTL_CHILDREN(oid);
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "abs_id",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &nm_rxq->iq_abs_id,
0, sysctl_uint16, "I", "absolute id of the queue");
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cntxt_id",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &nm_rxq->iq_cntxt_id,
0, sysctl_uint16, "I", "SGE context id of the queue");
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cidx",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &nm_rxq->iq_cidx, 0,
sysctl_uint16, "I", "consumer index");
children = SYSCTL_CHILDREN(oid);
oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, "fl",
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "freelist");
children = SYSCTL_CHILDREN(oid);
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cntxt_id",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &nm_rxq->fl_cntxt_id,
0, sysctl_uint16, "I", "SGE context id of the freelist");
SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "cidx", CTLFLAG_RD,
&nm_rxq->fl_cidx, 0, "consumer index");
SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "pidx", CTLFLAG_RD,
&nm_rxq->fl_pidx, 0, "producer index");
return (rc);
}
static int
free_nm_rxq(struct vi_info *vi, struct sge_nm_rxq *nm_rxq)
{
struct adapter *sc = vi->adapter;
if (vi->flags & VI_INIT_DONE)
MPASS(nm_rxq->iq_cntxt_id == INVALID_NM_RXQ_CNTXT_ID);
else
MPASS(nm_rxq->iq_cntxt_id == 0);
free_ring(sc, nm_rxq->iq_desc_tag, nm_rxq->iq_desc_map, nm_rxq->iq_ba,
nm_rxq->iq_desc);
free_ring(sc, nm_rxq->fl_desc_tag, nm_rxq->fl_desc_map, nm_rxq->fl_ba,
nm_rxq->fl_desc);
return (0);
}
static int
alloc_nm_txq(struct vi_info *vi, struct sge_nm_txq *nm_txq, int iqidx, int idx,
struct sysctl_oid *oid)
{
int rc;
size_t len;
struct port_info *pi = vi->pi;
struct adapter *sc = pi->adapter;
struct netmap_adapter *na = NA(vi->ifp);
char name[16];
struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid);
len = na->num_tx_desc * EQ_ESIZE + sc->params.sge.spg_len;
rc = alloc_ring(sc, len, &nm_txq->desc_tag, &nm_txq->desc_map,
&nm_txq->ba, (void **)&nm_txq->desc);
if (rc)
return (rc);
nm_txq->pidx = nm_txq->cidx = 0;
nm_txq->sidx = na->num_tx_desc;
nm_txq->nid = idx;
nm_txq->iqidx = iqidx;
nm_txq->cpl_ctrl0 = htobe32(V_TXPKT_OPCODE(CPL_TX_PKT) |
V_TXPKT_INTF(pi->tx_chan) | V_TXPKT_PF(sc->pf) |
V_TXPKT_VF(vi->vin) | V_TXPKT_VF_VLD(vi->vfvld));
if (sc->params.fw_vers >= FW_VERSION32(1, 24, 11, 0))
nm_txq->op_pkd = htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS2_WR));
else
nm_txq->op_pkd = htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_WR));
nm_txq->cntxt_id = INVALID_NM_TXQ_CNTXT_ID;
snprintf(name, sizeof(name), "%d", idx);
oid = SYSCTL_ADD_NODE(&vi->ctx, children, OID_AUTO, name,
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "netmap tx queue");
children = SYSCTL_CHILDREN(oid);
SYSCTL_ADD_UINT(&vi->ctx, children, OID_AUTO, "cntxt_id", CTLFLAG_RD,
&nm_txq->cntxt_id, 0, "SGE context id of the queue");
SYSCTL_ADD_PROC(&vi->ctx, children, OID_AUTO, "cidx",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &nm_txq->cidx, 0,
sysctl_uint16, "I", "consumer index");
SYSCTL_ADD_PROC(&vi->ctx, children, OID_AUTO, "pidx",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &nm_txq->pidx, 0,
sysctl_uint16, "I", "producer index");
return (rc);
}
static int
free_nm_txq(struct vi_info *vi, struct sge_nm_txq *nm_txq)
{
struct adapter *sc = vi->adapter;
if (vi->flags & VI_INIT_DONE)
MPASS(nm_txq->cntxt_id == INVALID_NM_TXQ_CNTXT_ID);
else
MPASS(nm_txq->cntxt_id == 0);
free_ring(sc, nm_txq->desc_tag, nm_txq->desc_map, nm_txq->ba,
nm_txq->desc);
return (0);
}
#endif
/*
* Returns a reasonable automatic cidx flush threshold for a given queue size.
*/
static u_int
qsize_to_fthresh(int qsize)
{
u_int fthresh;
while (!powerof2(qsize))
qsize++;
fthresh = ilog2(qsize);
if (fthresh > X_CIDXFLUSHTHRESH_128)
fthresh = X_CIDXFLUSHTHRESH_128;
return (fthresh);
}
static int
ctrl_eq_alloc(struct adapter *sc, struct sge_eq *eq)
{
int rc, cntxt_id;
struct fw_eq_ctrl_cmd c;
int qsize = eq->sidx + sc->params.sge.spg_len / EQ_ESIZE;
bzero(&c, sizeof(c));
c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_EQ_CTRL_CMD) | F_FW_CMD_REQUEST |
F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_CTRL_CMD_PFN(sc->pf) |
V_FW_EQ_CTRL_CMD_VFN(0));
c.alloc_to_len16 = htobe32(F_FW_EQ_CTRL_CMD_ALLOC |
F_FW_EQ_CTRL_CMD_EQSTART | FW_LEN16(c));
c.cmpliqid_eqid = htonl(V_FW_EQ_CTRL_CMD_CMPLIQID(eq->iqid));
c.physeqid_pkd = htobe32(0);
c.fetchszm_to_iqid =
htobe32(V_FW_EQ_CTRL_CMD_HOSTFCMODE(X_HOSTFCMODE_STATUS_PAGE) |
V_FW_EQ_CTRL_CMD_PCIECHN(eq->tx_chan) |
F_FW_EQ_CTRL_CMD_FETCHRO | V_FW_EQ_CTRL_CMD_IQID(eq->iqid));
c.dcaen_to_eqsize =
htobe32(V_FW_EQ_CTRL_CMD_FBMIN(chip_id(sc) <= CHELSIO_T5 ?
X_FETCHBURSTMIN_64B : X_FETCHBURSTMIN_64B_T6) |
V_FW_EQ_CTRL_CMD_FBMAX(X_FETCHBURSTMAX_512B) |
V_FW_EQ_CTRL_CMD_CIDXFTHRESH(qsize_to_fthresh(qsize)) |
V_FW_EQ_CTRL_CMD_EQSIZE(qsize));
c.eqaddr = htobe64(eq->ba);
rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c);
if (rc != 0) {
device_printf(sc->dev,
"failed to create control queue %d: %d\n", eq->tx_chan, rc);
return (rc);
}
eq->flags |= EQ_ALLOCATED;
eq->cntxt_id = G_FW_EQ_CTRL_CMD_EQID(be32toh(c.cmpliqid_eqid));
cntxt_id = eq->cntxt_id - sc->sge.eq_start;
if (cntxt_id >= sc->sge.neq)
panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__,
cntxt_id, sc->sge.neq - 1);
sc->sge.eqmap[cntxt_id] = eq;
return (rc);
}
static int
eth_eq_alloc(struct adapter *sc, struct vi_info *vi, struct sge_eq *eq)
{
int rc, cntxt_id;
struct fw_eq_eth_cmd c;
int qsize = eq->sidx + sc->params.sge.spg_len / EQ_ESIZE;
bzero(&c, sizeof(c));
c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_EQ_ETH_CMD) | F_FW_CMD_REQUEST |
F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_ETH_CMD_PFN(sc->pf) |
V_FW_EQ_ETH_CMD_VFN(0));
c.alloc_to_len16 = htobe32(F_FW_EQ_ETH_CMD_ALLOC |
F_FW_EQ_ETH_CMD_EQSTART | FW_LEN16(c));
c.autoequiqe_to_viid = htobe32(F_FW_EQ_ETH_CMD_AUTOEQUIQE |
F_FW_EQ_ETH_CMD_AUTOEQUEQE | V_FW_EQ_ETH_CMD_VIID(vi->viid));
c.fetchszm_to_iqid =
htobe32(V_FW_EQ_ETH_CMD_HOSTFCMODE(X_HOSTFCMODE_NONE) |
V_FW_EQ_ETH_CMD_PCIECHN(eq->tx_chan) | F_FW_EQ_ETH_CMD_FETCHRO |
V_FW_EQ_ETH_CMD_IQID(eq->iqid));
c.dcaen_to_eqsize =
htobe32(V_FW_EQ_ETH_CMD_FBMIN(chip_id(sc) <= CHELSIO_T5 ?
X_FETCHBURSTMIN_64B : X_FETCHBURSTMIN_64B_T6) |
V_FW_EQ_ETH_CMD_FBMAX(X_FETCHBURSTMAX_512B) |
V_FW_EQ_ETH_CMD_EQSIZE(qsize));
c.eqaddr = htobe64(eq->ba);
rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c);
if (rc != 0) {
device_printf(vi->dev,
"failed to create Ethernet egress queue: %d\n", rc);
return (rc);
}
eq->flags |= EQ_ALLOCATED;
eq->cntxt_id = G_FW_EQ_ETH_CMD_EQID(be32toh(c.eqid_pkd));
eq->abs_id = G_FW_EQ_ETH_CMD_PHYSEQID(be32toh(c.physeqid_pkd));
cntxt_id = eq->cntxt_id - sc->sge.eq_start;
if (cntxt_id >= sc->sge.neq)
panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__,
cntxt_id, sc->sge.neq - 1);
sc->sge.eqmap[cntxt_id] = eq;
return (rc);
}
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
static int
ofld_eq_alloc(struct adapter *sc, struct vi_info *vi, struct sge_eq *eq)
{
int rc, cntxt_id;
struct fw_eq_ofld_cmd c;
int qsize = eq->sidx + sc->params.sge.spg_len / EQ_ESIZE;
bzero(&c, sizeof(c));
c.op_to_vfn = htonl(V_FW_CMD_OP(FW_EQ_OFLD_CMD) | F_FW_CMD_REQUEST |
F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_OFLD_CMD_PFN(sc->pf) |
V_FW_EQ_OFLD_CMD_VFN(0));
c.alloc_to_len16 = htonl(F_FW_EQ_OFLD_CMD_ALLOC |
F_FW_EQ_OFLD_CMD_EQSTART | FW_LEN16(c));
c.fetchszm_to_iqid =
htonl(V_FW_EQ_OFLD_CMD_HOSTFCMODE(X_HOSTFCMODE_STATUS_PAGE) |
V_FW_EQ_OFLD_CMD_PCIECHN(eq->tx_chan) |
F_FW_EQ_OFLD_CMD_FETCHRO | V_FW_EQ_OFLD_CMD_IQID(eq->iqid));
c.dcaen_to_eqsize =
htobe32(V_FW_EQ_OFLD_CMD_FBMIN(chip_id(sc) <= CHELSIO_T5 ?
X_FETCHBURSTMIN_64B : X_FETCHBURSTMIN_64B_T6) |
V_FW_EQ_OFLD_CMD_FBMAX(X_FETCHBURSTMAX_512B) |
V_FW_EQ_OFLD_CMD_CIDXFTHRESH(qsize_to_fthresh(qsize)) |
V_FW_EQ_OFLD_CMD_EQSIZE(qsize));
c.eqaddr = htobe64(eq->ba);
rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c);
if (rc != 0) {
device_printf(vi->dev,
"failed to create egress queue for TCP offload: %d\n", rc);
return (rc);
}
eq->flags |= EQ_ALLOCATED;
eq->cntxt_id = G_FW_EQ_OFLD_CMD_EQID(be32toh(c.eqid_pkd));
cntxt_id = eq->cntxt_id - sc->sge.eq_start;
if (cntxt_id >= sc->sge.neq)
panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__,
cntxt_id, sc->sge.neq - 1);
sc->sge.eqmap[cntxt_id] = eq;
return (rc);
}
#endif
static int
alloc_eq(struct adapter *sc, struct vi_info *vi, struct sge_eq *eq)
{
int rc, qsize;
size_t len;
mtx_init(&eq->eq_lock, eq->lockname, NULL, MTX_DEF);
qsize = eq->sidx + sc->params.sge.spg_len / EQ_ESIZE;
len = qsize * EQ_ESIZE;
rc = alloc_ring(sc, len, &eq->desc_tag, &eq->desc_map,
&eq->ba, (void **)&eq->desc);
if (rc)
return (rc);
eq->pidx = eq->cidx = eq->dbidx = 0;
/* Note that equeqidx is not used with sge_wrq (OFLD/CTRL) queues. */
eq->equeqidx = 0;
eq->doorbells = sc->doorbells;
switch (eq->flags & EQ_TYPEMASK) {
case EQ_CTRL:
rc = ctrl_eq_alloc(sc, eq);
break;
case EQ_ETH:
rc = eth_eq_alloc(sc, vi, eq);
break;
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
case EQ_OFLD:
rc = ofld_eq_alloc(sc, vi, eq);
break;
#endif
default:
panic("%s: invalid eq type %d.", __func__,
eq->flags & EQ_TYPEMASK);
}
if (rc != 0) {
device_printf(sc->dev,
"failed to allocate egress queue(%d): %d\n",
eq->flags & EQ_TYPEMASK, rc);
}
if (isset(&eq->doorbells, DOORBELL_UDB) ||
isset(&eq->doorbells, DOORBELL_UDBWC) ||
isset(&eq->doorbells, DOORBELL_WCWR)) {
uint32_t s_qpp = sc->params.sge.eq_s_qpp;
uint32_t mask = (1 << s_qpp) - 1;
volatile uint8_t *udb;
udb = sc->udbs_base + UDBS_DB_OFFSET;
udb += (eq->cntxt_id >> s_qpp) << PAGE_SHIFT; /* pg offset */
eq->udb_qid = eq->cntxt_id & mask; /* id in page */
if (eq->udb_qid >= PAGE_SIZE / UDBS_SEG_SIZE)
clrbit(&eq->doorbells, DOORBELL_WCWR);
else {
udb += eq->udb_qid << UDBS_SEG_SHIFT; /* seg offset */
eq->udb_qid = 0;
}
eq->udb = (volatile void *)udb;
}
return (rc);
}
static int
free_eq(struct adapter *sc, struct sge_eq *eq)
{
int rc;
if (eq->flags & EQ_ALLOCATED) {
switch (eq->flags & EQ_TYPEMASK) {
case EQ_CTRL:
rc = -t4_ctrl_eq_free(sc, sc->mbox, sc->pf, 0,
eq->cntxt_id);
break;
case EQ_ETH:
rc = -t4_eth_eq_free(sc, sc->mbox, sc->pf, 0,
eq->cntxt_id);
break;
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
case EQ_OFLD:
rc = -t4_ofld_eq_free(sc, sc->mbox, sc->pf, 0,
eq->cntxt_id);
break;
#endif
default:
panic("%s: invalid eq type %d.", __func__,
eq->flags & EQ_TYPEMASK);
}
if (rc != 0) {
device_printf(sc->dev,
"failed to free egress queue (%d): %d\n",
eq->flags & EQ_TYPEMASK, rc);
return (rc);
}
eq->flags &= ~EQ_ALLOCATED;
}
free_ring(sc, eq->desc_tag, eq->desc_map, eq->ba, eq->desc);
if (mtx_initialized(&eq->eq_lock))
mtx_destroy(&eq->eq_lock);
bzero(eq, sizeof(*eq));
return (0);
}
static int
alloc_wrq(struct adapter *sc, struct vi_info *vi, struct sge_wrq *wrq,
struct sysctl_oid *oid)
{
int rc;
struct sysctl_ctx_list *ctx = vi ? &vi->ctx : &sc->ctx;
struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid);
rc = alloc_eq(sc, vi, &wrq->eq);
if (rc)
return (rc);
wrq->adapter = sc;
TASK_INIT(&wrq->wrq_tx_task, 0, wrq_tx_drain, wrq);
TAILQ_INIT(&wrq->incomplete_wrs);
STAILQ_INIT(&wrq->wr_list);
wrq->nwr_pending = 0;
wrq->ndesc_needed = 0;
SYSCTL_ADD_UAUTO(ctx, children, OID_AUTO, "ba", CTLFLAG_RD,
&wrq->eq.ba, "bus address of descriptor ring");
SYSCTL_ADD_INT(ctx, children, OID_AUTO, "dmalen", CTLFLAG_RD, NULL,
wrq->eq.sidx * EQ_ESIZE + sc->params.sge.spg_len,
"desc ring size in bytes");
SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "cntxt_id", CTLFLAG_RD,
&wrq->eq.cntxt_id, 0, "SGE context id of the queue");
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cidx",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &wrq->eq.cidx, 0,
sysctl_uint16, "I", "consumer index");
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "pidx",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &wrq->eq.pidx, 0,
sysctl_uint16, "I", "producer index");
SYSCTL_ADD_INT(ctx, children, OID_AUTO, "sidx", CTLFLAG_RD, NULL,
wrq->eq.sidx, "status page index");
SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "tx_wrs_direct", CTLFLAG_RD,
&wrq->tx_wrs_direct, "# of work requests (direct)");
SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "tx_wrs_copied", CTLFLAG_RD,
&wrq->tx_wrs_copied, "# of work requests (copied)");
SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "tx_wrs_sspace", CTLFLAG_RD,
&wrq->tx_wrs_ss, "# of work requests (copied from scratch space)");
return (rc);
}
static int
free_wrq(struct adapter *sc, struct sge_wrq *wrq)
{
int rc;
rc = free_eq(sc, &wrq->eq);
if (rc)
return (rc);
bzero(wrq, sizeof(*wrq));
return (0);
}
static int
alloc_txq(struct vi_info *vi, struct sge_txq *txq, int idx,
struct sysctl_oid *oid)
{
int rc;
struct port_info *pi = vi->pi;
struct adapter *sc = pi->adapter;
struct sge_eq *eq = &txq->eq;
struct txpkts *txp;
char name[16];
struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid);
rc = mp_ring_alloc(&txq->r, eq->sidx, txq, eth_tx, can_resume_eth_tx,
M_CXGBE, &eq->eq_lock, M_WAITOK);
if (rc != 0) {
device_printf(sc->dev, "failed to allocate mp_ring: %d\n", rc);
return (rc);
}
rc = alloc_eq(sc, vi, eq);
if (rc != 0) {
mp_ring_free(txq->r);
txq->r = NULL;
return (rc);
}
/* Can't fail after this point. */
if (idx == 0)
sc->sge.eq_base = eq->abs_id - eq->cntxt_id;
else
KASSERT(eq->cntxt_id + sc->sge.eq_base == eq->abs_id,
("eq_base mismatch"));
KASSERT(sc->sge.eq_base == 0 || sc->flags & IS_VF,
("PF with non-zero eq_base"));
TASK_INIT(&txq->tx_reclaim_task, 0, tx_reclaim, eq);
txq->ifp = vi->ifp;
txq->gl = sglist_alloc(TX_SGL_SEGS, M_WAITOK);
if (vi->flags & TX_USES_VM_WR)
txq->cpl_ctrl0 = htobe32(V_TXPKT_OPCODE(CPL_TX_PKT_XT) |
V_TXPKT_INTF(pi->tx_chan));
else
txq->cpl_ctrl0 = htobe32(V_TXPKT_OPCODE(CPL_TX_PKT_XT) |
V_TXPKT_INTF(pi->tx_chan) | V_TXPKT_PF(sc->pf) |
V_TXPKT_VF(vi->vin) | V_TXPKT_VF_VLD(vi->vfvld));
txq->tc_idx = -1;
txq->sdesc = malloc(eq->sidx * sizeof(struct tx_sdesc), M_CXGBE,
M_ZERO | M_WAITOK);
txp = &txq->txp;
txp->score = 5;
MPASS(nitems(txp->mb) >= sc->params.max_pkts_per_eth_tx_pkts_wr);
txq->txp.max_npkt = min(nitems(txp->mb),
sc->params.max_pkts_per_eth_tx_pkts_wr);
if (vi->flags & TX_USES_VM_WR && !(sc->flags & IS_VF))
txq->txp.max_npkt--;
snprintf(name, sizeof(name), "%d", idx);
oid = SYSCTL_ADD_NODE(&vi->ctx, children, OID_AUTO, name,
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "tx queue");
children = SYSCTL_CHILDREN(oid);
SYSCTL_ADD_UAUTO(&vi->ctx, children, OID_AUTO, "ba", CTLFLAG_RD,
&eq->ba, "bus address of descriptor ring");
SYSCTL_ADD_INT(&vi->ctx, children, OID_AUTO, "dmalen", CTLFLAG_RD, NULL,
eq->sidx * EQ_ESIZE + sc->params.sge.spg_len,
"desc ring size in bytes");
SYSCTL_ADD_UINT(&vi->ctx, children, OID_AUTO, "abs_id", CTLFLAG_RD,
&eq->abs_id, 0, "absolute id of the queue");
SYSCTL_ADD_UINT(&vi->ctx, children, OID_AUTO, "cntxt_id", CTLFLAG_RD,
&eq->cntxt_id, 0, "SGE context id of the queue");
SYSCTL_ADD_PROC(&vi->ctx, children, OID_AUTO, "cidx",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &eq->cidx, 0,
sysctl_uint16, "I", "consumer index");
SYSCTL_ADD_PROC(&vi->ctx, children, OID_AUTO, "pidx",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_NEEDGIANT, &eq->pidx, 0,
sysctl_uint16, "I", "producer index");
SYSCTL_ADD_INT(&vi->ctx, children, OID_AUTO, "sidx", CTLFLAG_RD, NULL,
eq->sidx, "status page index");
SYSCTL_ADD_PROC(&vi->ctx, children, OID_AUTO, "tc",
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, vi, idx, sysctl_tc,
"I", "traffic class (-1 means none)");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "txcsum", CTLFLAG_RD,
&txq->txcsum, "# of times hardware assisted with checksum");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "vlan_insertion",
CTLFLAG_RD, &txq->vlan_insertion,
"# of times hardware inserted 802.1Q tag");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "tso_wrs", CTLFLAG_RD,
&txq->tso_wrs, "# of TSO work requests");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "imm_wrs", CTLFLAG_RD,
&txq->imm_wrs, "# of work requests with immediate data");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "sgl_wrs", CTLFLAG_RD,
&txq->sgl_wrs, "# of work requests with direct SGL");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "txpkt_wrs", CTLFLAG_RD,
&txq->txpkt_wrs, "# of txpkt work requests (one pkt/WR)");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "txpkts0_wrs",
CTLFLAG_RD, &txq->txpkts0_wrs,
"# of txpkts (type 0) work requests");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "txpkts1_wrs",
CTLFLAG_RD, &txq->txpkts1_wrs,
"# of txpkts (type 1) work requests");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "txpkts0_pkts",
CTLFLAG_RD, &txq->txpkts0_pkts,
"# of frames tx'd using type0 txpkts work requests");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "txpkts1_pkts",
CTLFLAG_RD, &txq->txpkts1_pkts,
"# of frames tx'd using type1 txpkts work requests");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "raw_wrs", CTLFLAG_RD,
&txq->raw_wrs, "# of raw work requests (non-packets)");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "vxlan_tso_wrs",
CTLFLAG_RD, &txq->vxlan_tso_wrs, "# of VXLAN TSO work requests");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO, "vxlan_txcsum",
CTLFLAG_RD, &txq->vxlan_txcsum,
"# of times hardware assisted with inner checksums (VXLAN)");
#ifdef KERN_TLS
if (sc->flags & KERN_TLS_OK) {
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO,
"kern_tls_records", CTLFLAG_RD, &txq->kern_tls_records,
"# of NIC TLS records transmitted");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO,
"kern_tls_short", CTLFLAG_RD, &txq->kern_tls_short,
"# of short NIC TLS records transmitted");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO,
"kern_tls_partial", CTLFLAG_RD, &txq->kern_tls_partial,
"# of partial NIC TLS records transmitted");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO,
"kern_tls_full", CTLFLAG_RD, &txq->kern_tls_full,
"# of full NIC TLS records transmitted");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO,
"kern_tls_octets", CTLFLAG_RD, &txq->kern_tls_octets,
"# of payload octets in transmitted NIC TLS records");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO,
"kern_tls_waste", CTLFLAG_RD, &txq->kern_tls_waste,
"# of octets DMAd but not transmitted in NIC TLS records");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO,
"kern_tls_options", CTLFLAG_RD, &txq->kern_tls_options,
"# of NIC TLS options-only packets transmitted");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO,
"kern_tls_header", CTLFLAG_RD, &txq->kern_tls_header,
"# of NIC TLS header-only packets transmitted");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO,
"kern_tls_fin", CTLFLAG_RD, &txq->kern_tls_fin,
"# of NIC TLS FIN-only packets transmitted");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO,
"kern_tls_fin_short", CTLFLAG_RD, &txq->kern_tls_fin_short,
"# of NIC TLS padded FIN packets on short TLS records");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO,
"kern_tls_cbc", CTLFLAG_RD, &txq->kern_tls_cbc,
"# of NIC TLS sessions using AES-CBC");
SYSCTL_ADD_UQUAD(&vi->ctx, children, OID_AUTO,
"kern_tls_gcm", CTLFLAG_RD, &txq->kern_tls_gcm,
"# of NIC TLS sessions using AES-GCM");
}
#endif
mp_ring_sysctls(txq->r, &vi->ctx, children);
return (0);
}
static int
free_txq(struct vi_info *vi, struct sge_txq *txq)
{
int rc;
struct adapter *sc = vi->adapter;
struct sge_eq *eq = &txq->eq;
rc = free_eq(sc, eq);
if (rc)
return (rc);
sglist_free(txq->gl);
free(txq->sdesc, M_CXGBE);
mp_ring_free(txq->r);
bzero(txq, sizeof(*txq));
return (0);
}
static void
oneseg_dma_callback(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
bus_addr_t *ba = arg;
KASSERT(nseg == 1,
("%s meant for single segment mappings only.", __func__));
*ba = error ? 0 : segs->ds_addr;
}
static inline void
ring_fl_db(struct adapter *sc, struct sge_fl *fl)
{
uint32_t n, v;
n = IDXDIFF(fl->pidx >> 3, fl->dbidx, fl->sidx);
MPASS(n > 0);
wmb();
v = fl->dbval | V_PIDX(n);
if (fl->udb)
*fl->udb = htole32(v);
else
t4_write_reg(sc, sc->sge_kdoorbell_reg, v);
IDXINCR(fl->dbidx, n, fl->sidx);
}
/*
* Fills up the freelist by allocating up to 'n' buffers. Buffers that are
* recycled do not count towards this allocation budget.
*
* Returns non-zero to indicate that this freelist should be added to the list
* of starving freelists.
*/
static int
refill_fl(struct adapter *sc, struct sge_fl *fl, int n)
{
__be64 *d;
struct fl_sdesc *sd;
uintptr_t pa;
caddr_t cl;
struct rx_buf_info *rxb;
struct cluster_metadata *clm;
uint16_t max_pidx;
uint16_t hw_cidx = fl->hw_cidx; /* stable snapshot */
FL_LOCK_ASSERT_OWNED(fl);
/*
* We always stop at the beginning of the hardware descriptor that's just
* before the one with the hw cidx. This is to avoid hw pidx = hw cidx,
* which would mean an empty freelist to the chip.
*/
max_pidx = __predict_false(hw_cidx == 0) ? fl->sidx - 1 : hw_cidx - 1;
if (fl->pidx == max_pidx * 8)
return (0);
d = &fl->desc[fl->pidx];
sd = &fl->sdesc[fl->pidx];
while (n > 0) {
if (sd->cl != NULL) {
if (sd->nmbuf == 0) {
/*
* Fast recycle without involving any atomics on
* the cluster's metadata (if the cluster has
* metadata). This happens when all frames
* received in the cluster were small enough to
* fit within a single mbuf each.
*/
fl->cl_fast_recycled++;
goto recycled;
}
/*
* Cluster is guaranteed to have metadata. Clusters
* without metadata always take the fast recycle path
* when they're recycled.
*/
clm = cl_metadata(sd);
MPASS(clm != NULL);
if (atomic_fetchadd_int(&clm->refcount, -1) == 1) {
fl->cl_recycled++;
counter_u64_add(extfree_rels, 1);
goto recycled;
}
sd->cl = NULL; /* gave up my reference */
}
MPASS(sd->cl == NULL);
rxb = &sc->sge.rx_buf_info[fl->zidx];
cl = uma_zalloc(rxb->zone, M_NOWAIT);
if (__predict_false(cl == NULL)) {
if (fl->zidx != fl->safe_zidx) {
rxb = &sc->sge.rx_buf_info[fl->safe_zidx];
cl = uma_zalloc(rxb->zone, M_NOWAIT);
}
if (cl == NULL)
break;
}
fl->cl_allocated++;
n--;
pa = pmap_kextract((vm_offset_t)cl);
sd->cl = cl;
sd->zidx = fl->zidx;
if (fl->flags & FL_BUF_PACKING) {
*d = htobe64(pa | rxb->hwidx2);
sd->moff = rxb->size2;
} else {
*d = htobe64(pa | rxb->hwidx1);
sd->moff = 0;
}
recycled:
sd->nmbuf = 0;
d++;
sd++;
if (__predict_false((++fl->pidx & 7) == 0)) {
uint16_t pidx = fl->pidx >> 3;
if (__predict_false(pidx == fl->sidx)) {
fl->pidx = 0;
pidx = 0;
sd = fl->sdesc;
d = fl->desc;
}
if (n < 8 || pidx == max_pidx)
break;
if (IDXDIFF(pidx, fl->dbidx, fl->sidx) >= 4)
ring_fl_db(sc, fl);
}
}
if ((fl->pidx >> 3) != fl->dbidx)
ring_fl_db(sc, fl);
return (FL_RUNNING_LOW(fl) && !(fl->flags & FL_STARVING));
}
/*
* Attempt to refill all starving freelists.
*/
static void
refill_sfl(void *arg)
{
struct adapter *sc = arg;
struct sge_fl *fl, *fl_temp;
mtx_assert(&sc->sfl_lock, MA_OWNED);
TAILQ_FOREACH_SAFE(fl, &sc->sfl, link, fl_temp) {
FL_LOCK(fl);
refill_fl(sc, fl, 64);
if (FL_NOT_RUNNING_LOW(fl) || fl->flags & FL_DOOMED) {
TAILQ_REMOVE(&sc->sfl, fl, link);
fl->flags &= ~FL_STARVING;
}
FL_UNLOCK(fl);
}
if (!TAILQ_EMPTY(&sc->sfl))
callout_schedule(&sc->sfl_callout, hz / 5);
}
static int
alloc_fl_sdesc(struct sge_fl *fl)
{
fl->sdesc = malloc(fl->sidx * 8 * sizeof(struct fl_sdesc), M_CXGBE,
M_ZERO | M_WAITOK);
return (0);
}
static void
free_fl_sdesc(struct adapter *sc, struct sge_fl *fl)
{
struct fl_sdesc *sd;
struct cluster_metadata *clm;
int i;
sd = fl->sdesc;
for (i = 0; i < fl->sidx * 8; i++, sd++) {
if (sd->cl == NULL)
continue;
if (sd->nmbuf == 0)
uma_zfree(sc->sge.rx_buf_info[sd->zidx].zone, sd->cl);
else if (fl->flags & FL_BUF_PACKING) {
clm = cl_metadata(sd);
if (atomic_fetchadd_int(&clm->refcount, -1) == 1) {
uma_zfree(sc->sge.rx_buf_info[sd->zidx].zone,
sd->cl);
counter_u64_add(extfree_rels, 1);
}
}
sd->cl = NULL;
}
free(fl->sdesc, M_CXGBE);
fl->sdesc = NULL;
}
static inline void
get_pkt_gl(struct mbuf *m, struct sglist *gl)
{
int rc;
M_ASSERTPKTHDR(m);
sglist_reset(gl);
rc = sglist_append_mbuf(gl, m);
if (__predict_false(rc != 0)) {
panic("%s: mbuf %p (%d segs) was vetted earlier but now fails "
"with %d.", __func__, m, mbuf_nsegs(m), rc);
}
KASSERT(gl->sg_nseg == mbuf_nsegs(m),
("%s: nsegs changed for mbuf %p from %d to %d", __func__, m,
mbuf_nsegs(m), gl->sg_nseg));
#if 0 /* vm_wr not readily available here. */
KASSERT(gl->sg_nseg > 0 && gl->sg_nseg <= max_nsegs_allowed(m, vm_wr),
("%s: %d segments, should have been 1 <= nsegs <= %d", __func__,
gl->sg_nseg, max_nsegs_allowed(m, vm_wr)));
#endif
}
/*
* len16 for a txpkt WR with a GL. Includes the firmware work request header.
*/
static inline u_int
txpkt_len16(u_int nsegs, const u_int extra)
{
u_int n;
MPASS(nsegs > 0);
nsegs--; /* first segment is part of ulptx_sgl */
n = extra + sizeof(struct fw_eth_tx_pkt_wr) +
sizeof(struct cpl_tx_pkt_core) +
sizeof(struct ulptx_sgl) + 8 * ((3 * nsegs) / 2 + (nsegs & 1));
return (howmany(n, 16));
}
/*
* len16 for a txpkt_vm WR with a GL. Includes the firmware work
* request header.
*/
static inline u_int
txpkt_vm_len16(u_int nsegs, const u_int extra)
{
u_int n;
MPASS(nsegs > 0);
nsegs--; /* first segment is part of ulptx_sgl */
n = extra + sizeof(struct fw_eth_tx_pkt_vm_wr) +
sizeof(struct cpl_tx_pkt_core) +
sizeof(struct ulptx_sgl) + 8 * ((3 * nsegs) / 2 + (nsegs & 1));
return (howmany(n, 16));
}
static inline void
calculate_mbuf_len16(struct mbuf *m, bool vm_wr)
{
const int lso = sizeof(struct cpl_tx_pkt_lso_core);
const int tnl_lso = sizeof(struct cpl_tx_tnl_lso);
if (vm_wr) {
if (needs_tso(m))
set_mbuf_len16(m, txpkt_vm_len16(mbuf_nsegs(m), lso));
else
set_mbuf_len16(m, txpkt_vm_len16(mbuf_nsegs(m), 0));
return;
}
if (needs_tso(m)) {
if (needs_vxlan_tso(m))
set_mbuf_len16(m, txpkt_len16(mbuf_nsegs(m), tnl_lso));
else
set_mbuf_len16(m, txpkt_len16(mbuf_nsegs(m), lso));
} else
set_mbuf_len16(m, txpkt_len16(mbuf_nsegs(m), 0));
}
/*
* len16 for a txpkts type 0 WR with a GL. Does not include the firmware work
* request header.
*/
static inline u_int
txpkts0_len16(u_int nsegs)
{
u_int n;
MPASS(nsegs > 0);
nsegs--; /* first segment is part of ulptx_sgl */
n = sizeof(struct ulp_txpkt) + sizeof(struct ulptx_idata) +
sizeof(struct cpl_tx_pkt_core) + sizeof(struct ulptx_sgl) +
8 * ((3 * nsegs) / 2 + (nsegs & 1));
return (howmany(n, 16));
}
/*
* len16 for a txpkts type 1 WR with a GL. Does not include the firmware work
* request header.
*/
static inline u_int
txpkts1_len16(void)
{
u_int n;
n = sizeof(struct cpl_tx_pkt_core) + sizeof(struct ulptx_sgl);
return (howmany(n, 16));
}
static inline u_int
imm_payload(u_int ndesc)
{
u_int n;
n = ndesc * EQ_ESIZE - sizeof(struct fw_eth_tx_pkt_wr) -
sizeof(struct cpl_tx_pkt_core);
return (n);
}
static inline uint64_t
csum_to_ctrl(struct adapter *sc, struct mbuf *m)
{
uint64_t ctrl;
int csum_type, l2hlen, l3hlen;
int x, y;
static const int csum_types[3][2] = {
{TX_CSUM_TCPIP, TX_CSUM_TCPIP6},
{TX_CSUM_UDPIP, TX_CSUM_UDPIP6},
{TX_CSUM_IP, 0}
};
M_ASSERTPKTHDR(m);
if (!needs_hwcsum(m))
return (F_TXPKT_IPCSUM_DIS | F_TXPKT_L4CSUM_DIS);
MPASS(m->m_pkthdr.l2hlen >= ETHER_HDR_LEN);
MPASS(m->m_pkthdr.l3hlen >= sizeof(struct ip));
if (needs_vxlan_csum(m)) {
MPASS(m->m_pkthdr.l4hlen > 0);
MPASS(m->m_pkthdr.l5hlen > 0);
MPASS(m->m_pkthdr.inner_l2hlen >= ETHER_HDR_LEN);
MPASS(m->m_pkthdr.inner_l3hlen >= sizeof(struct ip));
l2hlen = m->m_pkthdr.l2hlen + m->m_pkthdr.l3hlen +
m->m_pkthdr.l4hlen + m->m_pkthdr.l5hlen +
m->m_pkthdr.inner_l2hlen - ETHER_HDR_LEN;
l3hlen = m->m_pkthdr.inner_l3hlen;
} else {
l2hlen = m->m_pkthdr.l2hlen - ETHER_HDR_LEN;
l3hlen = m->m_pkthdr.l3hlen;
}
ctrl = 0;
if (!needs_l3_csum(m))
ctrl |= F_TXPKT_IPCSUM_DIS;
if (m->m_pkthdr.csum_flags & (CSUM_IP_TCP | CSUM_INNER_IP_TCP |
CSUM_IP6_TCP | CSUM_INNER_IP6_TCP))
x = 0; /* TCP */
else if (m->m_pkthdr.csum_flags & (CSUM_IP_UDP | CSUM_INNER_IP_UDP |
CSUM_IP6_UDP | CSUM_INNER_IP6_UDP))
x = 1; /* UDP */
else
x = 2;
if (m->m_pkthdr.csum_flags & (CSUM_IP | CSUM_IP_TCP | CSUM_IP_UDP |
CSUM_INNER_IP | CSUM_INNER_IP_TCP | CSUM_INNER_IP_UDP))
y = 0; /* IPv4 */
else {
MPASS(m->m_pkthdr.csum_flags & (CSUM_IP6_TCP | CSUM_IP6_UDP |
CSUM_INNER_IP6_TCP | CSUM_INNER_IP6_UDP));
y = 1; /* IPv6 */
}
/*
* needs_hwcsum returned true earlier so there must be some kind of
* checksum to calculate.
*/
csum_type = csum_types[x][y];
MPASS(csum_type != 0);
if (csum_type == TX_CSUM_IP)
ctrl |= F_TXPKT_L4CSUM_DIS;
ctrl |= V_TXPKT_CSUM_TYPE(csum_type) | V_TXPKT_IPHDR_LEN(l3hlen);
if (chip_id(sc) <= CHELSIO_T5)
ctrl |= V_TXPKT_ETHHDR_LEN(l2hlen);
else
ctrl |= V_T6_TXPKT_ETHHDR_LEN(l2hlen);
return (ctrl);
}
static inline void *
write_lso_cpl(void *cpl, struct mbuf *m0)
{
struct cpl_tx_pkt_lso_core *lso;
uint32_t ctrl;
KASSERT(m0->m_pkthdr.l2hlen > 0 && m0->m_pkthdr.l3hlen > 0 &&
m0->m_pkthdr.l4hlen > 0,
("%s: mbuf %p needs TSO but missing header lengths",
__func__, m0));
ctrl = V_LSO_OPCODE(CPL_TX_PKT_LSO) |
F_LSO_FIRST_SLICE | F_LSO_LAST_SLICE |
V_LSO_ETHHDR_LEN((m0->m_pkthdr.l2hlen - ETHER_HDR_LEN) >> 2) |
V_LSO_IPHDR_LEN(m0->m_pkthdr.l3hlen >> 2) |
V_LSO_TCPHDR_LEN(m0->m_pkthdr.l4hlen >> 2);
if (m0->m_pkthdr.l3hlen == sizeof(struct ip6_hdr))
ctrl |= F_LSO_IPV6;
lso = cpl;
lso->lso_ctrl = htobe32(ctrl);
lso->ipid_ofst = htobe16(0);
lso->mss = htobe16(m0->m_pkthdr.tso_segsz);
lso->seqno_offset = htobe32(0);
lso->len = htobe32(m0->m_pkthdr.len);
return (lso + 1);
}
static void *
write_tnl_lso_cpl(void *cpl, struct mbuf *m0)
{
struct cpl_tx_tnl_lso *tnl_lso = cpl;
uint32_t ctrl;
KASSERT(m0->m_pkthdr.inner_l2hlen > 0 &&
m0->m_pkthdr.inner_l3hlen > 0 && m0->m_pkthdr.inner_l4hlen > 0 &&
m0->m_pkthdr.inner_l5hlen > 0,
("%s: mbuf %p needs VXLAN_TSO but missing inner header lengths",
__func__, m0));
KASSERT(m0->m_pkthdr.l2hlen > 0 && m0->m_pkthdr.l3hlen > 0 &&
m0->m_pkthdr.l4hlen > 0 && m0->m_pkthdr.l5hlen > 0,
("%s: mbuf %p needs VXLAN_TSO but missing outer header lengths",
__func__, m0));
/* Outer headers. */
ctrl = V_CPL_TX_TNL_LSO_OPCODE(CPL_TX_TNL_LSO) |
F_CPL_TX_TNL_LSO_FIRST | F_CPL_TX_TNL_LSO_LAST |
V_CPL_TX_TNL_LSO_ETHHDRLENOUT(
(m0->m_pkthdr.l2hlen - ETHER_HDR_LEN) >> 2) |
V_CPL_TX_TNL_LSO_IPHDRLENOUT(m0->m_pkthdr.l3hlen >> 2) |
F_CPL_TX_TNL_LSO_IPLENSETOUT;
if (m0->m_pkthdr.l3hlen == sizeof(struct ip6_hdr))
ctrl |= F_CPL_TX_TNL_LSO_IPV6OUT;
else {
ctrl |= F_CPL_TX_TNL_LSO_IPHDRCHKOUT |
F_CPL_TX_TNL_LSO_IPIDINCOUT;
}
tnl_lso->op_to_IpIdSplitOut = htobe32(ctrl);
tnl_lso->IpIdOffsetOut = 0;
tnl_lso->UdpLenSetOut_to_TnlHdrLen =
htobe16(F_CPL_TX_TNL_LSO_UDPCHKCLROUT |
F_CPL_TX_TNL_LSO_UDPLENSETOUT |
V_CPL_TX_TNL_LSO_TNLHDRLEN(m0->m_pkthdr.l2hlen +
m0->m_pkthdr.l3hlen + m0->m_pkthdr.l4hlen +
m0->m_pkthdr.l5hlen) |
V_CPL_TX_TNL_LSO_TNLTYPE(TX_TNL_TYPE_VXLAN));
tnl_lso->r1 = 0;
/* Inner headers. */
ctrl = V_CPL_TX_TNL_LSO_ETHHDRLEN(
(m0->m_pkthdr.inner_l2hlen - ETHER_HDR_LEN) >> 2) |
V_CPL_TX_TNL_LSO_IPHDRLEN(m0->m_pkthdr.inner_l3hlen >> 2) |
V_CPL_TX_TNL_LSO_TCPHDRLEN(m0->m_pkthdr.inner_l4hlen >> 2);
if (m0->m_pkthdr.inner_l3hlen == sizeof(struct ip6_hdr))
ctrl |= F_CPL_TX_TNL_LSO_IPV6;
tnl_lso->Flow_to_TcpHdrLen = htobe32(ctrl);
tnl_lso->IpIdOffset = 0;
tnl_lso->IpIdSplit_to_Mss =
htobe16(V_CPL_TX_TNL_LSO_MSS(m0->m_pkthdr.tso_segsz));
tnl_lso->TCPSeqOffset = 0;
tnl_lso->EthLenOffset_Size =
htobe32(V_CPL_TX_TNL_LSO_SIZE(m0->m_pkthdr.len));
return (tnl_lso + 1);
}
#define VM_TX_L2HDR_LEN 16 /* ethmacdst to vlantci */
/*
* Write a VM txpkt WR for this packet to the hardware descriptors, update the
* software descriptor, and advance the pidx. It is guaranteed that enough
* descriptors are available.
*
* The return value is the # of hardware descriptors used.
*/
static u_int
write_txpkt_vm_wr(struct adapter *sc, struct sge_txq *txq, struct mbuf *m0)
{
struct sge_eq *eq;
struct fw_eth_tx_pkt_vm_wr *wr;
struct tx_sdesc *txsd;
struct cpl_tx_pkt_core *cpl;
uint32_t ctrl; /* used in many unrelated places */
uint64_t ctrl1;
int len16, ndesc, pktlen, nsegs;
caddr_t dst;
TXQ_LOCK_ASSERT_OWNED(txq);
M_ASSERTPKTHDR(m0);
len16 = mbuf_len16(m0);
nsegs = mbuf_nsegs(m0);
pktlen = m0->m_pkthdr.len;
ctrl = sizeof(struct cpl_tx_pkt_core);
if (needs_tso(m0))
ctrl += sizeof(struct cpl_tx_pkt_lso_core);
ndesc = tx_len16_to_desc(len16);
/* Firmware work request header */
eq = &txq->eq;
wr = (void *)&eq->desc[eq->pidx];
wr->op_immdlen = htobe32(V_FW_WR_OP(FW_ETH_TX_PKT_VM_WR) |
V_FW_ETH_TX_PKT_WR_IMMDLEN(ctrl));
ctrl = V_FW_WR_LEN16(len16);
wr->equiq_to_len16 = htobe32(ctrl);
wr->r3[0] = 0;
wr->r3[1] = 0;
/*
* Copy over ethmacdst, ethmacsrc, ethtype, and vlantci.
* vlantci is ignored unless the ethtype is 0x8100, so it's
* simpler to always copy it rather than making it
* conditional. Also, it seems that we do not have to set
* vlantci or fake the ethtype when doing VLAN tag insertion.
*/
m_copydata(m0, 0, VM_TX_L2HDR_LEN, wr->ethmacdst);
if (needs_tso(m0)) {
cpl = write_lso_cpl(wr + 1, m0);
txq->tso_wrs++;
} else
cpl = (void *)(wr + 1);
/* Checksum offload */
ctrl1 = csum_to_ctrl(sc, m0);
if (ctrl1 != (F_TXPKT_IPCSUM_DIS | F_TXPKT_L4CSUM_DIS))
txq->txcsum++; /* some hardware assistance provided */
/* VLAN tag insertion */
if (needs_vlan_insertion(m0)) {
ctrl1 |= F_TXPKT_VLAN_VLD |
V_TXPKT_VLAN(m0->m_pkthdr.ether_vtag);
txq->vlan_insertion++;
}
/* CPL header */
cpl->ctrl0 = txq->cpl_ctrl0;
cpl->pack = 0;
cpl->len = htobe16(pktlen);
cpl->ctrl1 = htobe64(ctrl1);
/* SGL */
dst = (void *)(cpl + 1);
/*
* A packet using TSO will use up an entire descriptor for the
* firmware work request header, LSO CPL, and TX_PKT_XT CPL.
* If this descriptor is the last descriptor in the ring, wrap
* around to the front of the ring explicitly for the start of
* the sgl.
*/
if (dst == (void *)&eq->desc[eq->sidx]) {
dst = (void *)&eq->desc[0];
write_gl_to_txd(txq, m0, &dst, 0);
} else
write_gl_to_txd(txq, m0, &dst, eq->sidx - ndesc < eq->pidx);
txq->sgl_wrs++;
txq->txpkt_wrs++;
txsd = &txq->sdesc[eq->pidx];
txsd->m = m0;
txsd->desc_used = ndesc;
return (ndesc);
}
/*
* Write a raw WR to the hardware descriptors, update the software
* descriptor, and advance the pidx. It is guaranteed that enough
* descriptors are available.
*
* The return value is the # of hardware descriptors used.
*/
static u_int
write_raw_wr(struct sge_txq *txq, void *wr, struct mbuf *m0, u_int available)
{
struct sge_eq *eq = &txq->eq;
struct tx_sdesc *txsd;
struct mbuf *m;
caddr_t dst;
int len16, ndesc;
len16 = mbuf_len16(m0);
ndesc = tx_len16_to_desc(len16);
MPASS(ndesc <= available);
dst = wr;
for (m = m0; m != NULL; m = m->m_next)
copy_to_txd(eq, mtod(m, caddr_t), &dst, m->m_len);
txq->raw_wrs++;
txsd = &txq->sdesc[eq->pidx];
txsd->m = m0;
txsd->desc_used = ndesc;
return (ndesc);
}
/*
* Write a txpkt WR for this packet to the hardware descriptors, update the
* software descriptor, and advance the pidx. It is guaranteed that enough
* descriptors are available.
*
* The return value is the # of hardware descriptors used.
*/
static u_int
write_txpkt_wr(struct adapter *sc, struct sge_txq *txq, struct mbuf *m0,
u_int available)
{
struct sge_eq *eq;
struct fw_eth_tx_pkt_wr *wr;
struct tx_sdesc *txsd;
struct cpl_tx_pkt_core *cpl;
uint32_t ctrl; /* used in many unrelated places */
uint64_t ctrl1;
int len16, ndesc, pktlen, nsegs;
caddr_t dst;
TXQ_LOCK_ASSERT_OWNED(txq);
M_ASSERTPKTHDR(m0);
len16 = mbuf_len16(m0);
nsegs = mbuf_nsegs(m0);
pktlen = m0->m_pkthdr.len;
ctrl = sizeof(struct cpl_tx_pkt_core);
if (needs_tso(m0)) {
if (needs_vxlan_tso(m0))
ctrl += sizeof(struct cpl_tx_tnl_lso);
else
ctrl += sizeof(struct cpl_tx_pkt_lso_core);
} else if (!(mbuf_cflags(m0) & MC_NOMAP) && pktlen <= imm_payload(2) &&
available >= 2) {
/* Immediate data. Recalculate len16 and set nsegs to 0. */
ctrl += pktlen;
len16 = howmany(sizeof(struct fw_eth_tx_pkt_wr) +
sizeof(struct cpl_tx_pkt_core) + pktlen, 16);
nsegs = 0;
}
ndesc = tx_len16_to_desc(len16);
MPASS(ndesc <= available);
/* Firmware work request header */
eq = &txq->eq;
wr = (void *)&eq->desc[eq->pidx];
wr->op_immdlen = htobe32(V_FW_WR_OP(FW_ETH_TX_PKT_WR) |
V_FW_ETH_TX_PKT_WR_IMMDLEN(ctrl));
ctrl = V_FW_WR_LEN16(len16);
wr->equiq_to_len16 = htobe32(ctrl);
wr->r3 = 0;
if (needs_tso(m0)) {
if (needs_vxlan_tso(m0)) {
cpl = write_tnl_lso_cpl(wr + 1, m0);
txq->vxlan_tso_wrs++;
} else {
cpl = write_lso_cpl(wr + 1, m0);
txq->tso_wrs++;
}
} else
cpl = (void *)(wr + 1);
/* Checksum offload */
ctrl1 = csum_to_ctrl(sc, m0);
if (ctrl1 != (F_TXPKT_IPCSUM_DIS | F_TXPKT_L4CSUM_DIS)) {
/* some hardware assistance provided */
if (needs_vxlan_csum(m0))
txq->vxlan_txcsum++;
else
txq->txcsum++;
}
/* VLAN tag insertion */
if (needs_vlan_insertion(m0)) {
ctrl1 |= F_TXPKT_VLAN_VLD |
V_TXPKT_VLAN(m0->m_pkthdr.ether_vtag);
txq->vlan_insertion++;
}
/* CPL header */
cpl->ctrl0 = txq->cpl_ctrl0;
cpl->pack = 0;
cpl->len = htobe16(pktlen);
cpl->ctrl1 = htobe64(ctrl1);
/* SGL */
dst = (void *)(cpl + 1);
if (__predict_false((uintptr_t)dst == (uintptr_t)&eq->desc[eq->sidx]))
dst = (caddr_t)&eq->desc[0];
if (nsegs > 0) {
write_gl_to_txd(txq, m0, &dst, eq->sidx - ndesc < eq->pidx);
txq->sgl_wrs++;
} else {
struct mbuf *m;
for (m = m0; m != NULL; m = m->m_next) {
copy_to_txd(eq, mtod(m, caddr_t), &dst, m->m_len);
#ifdef INVARIANTS
pktlen -= m->m_len;
#endif
}
#ifdef INVARIANTS
KASSERT(pktlen == 0, ("%s: %d bytes left.", __func__, pktlen));
#endif
txq->imm_wrs++;
}
txq->txpkt_wrs++;
txsd = &txq->sdesc[eq->pidx];
txsd->m = m0;
txsd->desc_used = ndesc;
return (ndesc);
}
static inline bool
cmp_l2hdr(struct txpkts *txp, struct mbuf *m)
{
int len;
MPASS(txp->npkt > 0);
MPASS(m->m_len >= VM_TX_L2HDR_LEN);
if (txp->ethtype == be16toh(ETHERTYPE_VLAN))
len = VM_TX_L2HDR_LEN;
else
len = sizeof(struct ether_header);
return (memcmp(m->m_data, &txp->ethmacdst[0], len) != 0);
}
static inline void
save_l2hdr(struct txpkts *txp, struct mbuf *m)
{
MPASS(m->m_len >= VM_TX_L2HDR_LEN);
memcpy(&txp->ethmacdst[0], mtod(m, const void *), VM_TX_L2HDR_LEN);
}
static int
add_to_txpkts_vf(struct adapter *sc, struct sge_txq *txq, struct mbuf *m,
int avail, bool *send)
{
struct txpkts *txp = &txq->txp;
/* Cannot have TSO and coalesce at the same time. */
if (cannot_use_txpkts(m)) {
cannot_coalesce:
*send = txp->npkt > 0;
return (EINVAL);
}
/* VF allows coalescing of type 1 (1 GL) only */
if (mbuf_nsegs(m) > 1)
goto cannot_coalesce;
*send = false;
if (txp->npkt > 0) {
MPASS(tx_len16_to_desc(txp->len16) <= avail);
MPASS(txp->npkt < txp->max_npkt);
MPASS(txp->wr_type == 1); /* VF supports type 1 only */
if (tx_len16_to_desc(txp->len16 + txpkts1_len16()) > avail) {
retry_after_send:
*send = true;
return (EAGAIN);
}
if (m->m_pkthdr.len + txp->plen > 65535)
goto retry_after_send;
if (cmp_l2hdr(txp, m))
goto retry_after_send;
txp->len16 += txpkts1_len16();
txp->plen += m->m_pkthdr.len;
txp->mb[txp->npkt++] = m;
if (txp->npkt == txp->max_npkt)
*send = true;
} else {
txp->len16 = howmany(sizeof(struct fw_eth_tx_pkts_vm_wr), 16) +
txpkts1_len16();
if (tx_len16_to_desc(txp->len16) > avail)
goto cannot_coalesce;
txp->npkt = 1;
txp->wr_type = 1;
txp->plen = m->m_pkthdr.len;
txp->mb[0] = m;
save_l2hdr(txp, m);
}
return (0);
}
static int
add_to_txpkts_pf(struct adapter *sc, struct sge_txq *txq, struct mbuf *m,
int avail, bool *send)
{
struct txpkts *txp = &txq->txp;
int nsegs;
MPASS(!(sc->flags & IS_VF));
/* Cannot have TSO and coalesce at the same time. */
if (cannot_use_txpkts(m)) {
cannot_coalesce:
*send = txp->npkt > 0;
return (EINVAL);
}
*send = false;
nsegs = mbuf_nsegs(m);
if (txp->npkt == 0) {
if (m->m_pkthdr.len > 65535)
goto cannot_coalesce;
if (nsegs > 1) {
txp->wr_type = 0;
txp->len16 =
howmany(sizeof(struct fw_eth_tx_pkts_wr), 16) +
txpkts0_len16(nsegs);
} else {
txp->wr_type = 1;
txp->len16 =
howmany(sizeof(struct fw_eth_tx_pkts_wr), 16) +
txpkts1_len16();
}
if (tx_len16_to_desc(txp->len16) > avail)
goto cannot_coalesce;
txp->npkt = 1;
txp->plen = m->m_pkthdr.len;
txp->mb[0] = m;
} else {
MPASS(tx_len16_to_desc(txp->len16) <= avail);
MPASS(txp->npkt < txp->max_npkt);
if (m->m_pkthdr.len + txp->plen > 65535) {
retry_after_send:
*send = true;
return (EAGAIN);
}
MPASS(txp->wr_type == 0 || txp->wr_type == 1);
if (txp->wr_type == 0) {
if (tx_len16_to_desc(txp->len16 +
txpkts0_len16(nsegs)) > min(avail, SGE_MAX_WR_NDESC))
goto retry_after_send;
txp->len16 += txpkts0_len16(nsegs);
} else {
if (nsegs != 1)
goto retry_after_send;
if (tx_len16_to_desc(txp->len16 + txpkts1_len16()) >
avail)
goto retry_after_send;
txp->len16 += txpkts1_len16();
}
txp->plen += m->m_pkthdr.len;
txp->mb[txp->npkt++] = m;
if (txp->npkt == txp->max_npkt)
*send = true;
}
return (0);
}
/*
* Write a txpkts WR for the packets in txp to the hardware descriptors, update
* the software descriptor, and advance the pidx. It is guaranteed that enough
* descriptors are available.
*
* The return value is the # of hardware descriptors used.
*/
static u_int
write_txpkts_wr(struct adapter *sc, struct sge_txq *txq)
{
const struct txpkts *txp = &txq->txp;
struct sge_eq *eq = &txq->eq;
struct fw_eth_tx_pkts_wr *wr;
struct tx_sdesc *txsd;
struct cpl_tx_pkt_core *cpl;
uint64_t ctrl1;
int ndesc, i, checkwrap;
struct mbuf *m, *last;
void *flitp;
TXQ_LOCK_ASSERT_OWNED(txq);
MPASS(txp->npkt > 0);
MPASS(txp->len16 <= howmany(SGE_MAX_WR_LEN, 16));
wr = (void *)&eq->desc[eq->pidx];
wr->op_pkd = htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_WR));
wr->equiq_to_len16 = htobe32(V_FW_WR_LEN16(txp->len16));
wr->plen = htobe16(txp->plen);
wr->npkt = txp->npkt;
wr->r3 = 0;
wr->type = txp->wr_type;
flitp = wr + 1;
/*
* At this point we are 16B into a hardware descriptor. If checkwrap is
* set then we know the WR is going to wrap around somewhere. We'll
* check for that at appropriate points.
*/
ndesc = tx_len16_to_desc(txp->len16);
last = NULL;
checkwrap = eq->sidx - ndesc < eq->pidx;
for (i = 0; i < txp->npkt; i++) {
m = txp->mb[i];
if (txp->wr_type == 0) {
struct ulp_txpkt *ulpmc;
struct ulptx_idata *ulpsc;
/* ULP master command */
ulpmc = flitp;
ulpmc->cmd_dest = htobe32(V_ULPTX_CMD(ULP_TX_PKT) |
V_ULP_TXPKT_DEST(0) | V_ULP_TXPKT_FID(eq->iqid));
ulpmc->len = htobe32(txpkts0_len16(mbuf_nsegs(m)));
/* ULP subcommand */
ulpsc = (void *)(ulpmc + 1);
ulpsc->cmd_more = htobe32(V_ULPTX_CMD(ULP_TX_SC_IMM) |
F_ULP_TX_SC_MORE);
ulpsc->len = htobe32(sizeof(struct cpl_tx_pkt_core));
cpl = (void *)(ulpsc + 1);
if (checkwrap &&
(uintptr_t)cpl == (uintptr_t)&eq->desc[eq->sidx])
cpl = (void *)&eq->desc[0];
} else {
cpl = flitp;
}
/* Checksum offload */
ctrl1 = csum_to_ctrl(sc, m);
if (ctrl1 != (F_TXPKT_IPCSUM_DIS | F_TXPKT_L4CSUM_DIS)) {
/* some hardware assistance provided */
if (needs_vxlan_csum(m))
txq->vxlan_txcsum++;
else
txq->txcsum++;
}
/* VLAN tag insertion */
if (needs_vlan_insertion(m)) {
ctrl1 |= F_TXPKT_VLAN_VLD |
V_TXPKT_VLAN(m->m_pkthdr.ether_vtag);
txq->vlan_insertion++;
}
/* CPL header */
cpl->ctrl0 = txq->cpl_ctrl0;
cpl->pack = 0;
cpl->len = htobe16(m->m_pkthdr.len);
cpl->ctrl1 = htobe64(ctrl1);
flitp = cpl + 1;
if (checkwrap &&
(uintptr_t)flitp == (uintptr_t)&eq->desc[eq->sidx])
flitp = (void *)&eq->desc[0];
write_gl_to_txd(txq, m, (caddr_t *)(&flitp), checkwrap);
if (last != NULL)
last->m_nextpkt = m;
last = m;
}
txq->sgl_wrs++;
if (txp->wr_type == 0) {
txq->txpkts0_pkts += txp->npkt;
txq->txpkts0_wrs++;
} else {
txq->txpkts1_pkts += txp->npkt;
txq->txpkts1_wrs++;
}
txsd = &txq->sdesc[eq->pidx];
txsd->m = txp->mb[0];
txsd->desc_used = ndesc;
return (ndesc);
}
static u_int
write_txpkts_vm_wr(struct adapter *sc, struct sge_txq *txq)
{
const struct txpkts *txp = &txq->txp;
struct sge_eq *eq = &txq->eq;
struct fw_eth_tx_pkts_vm_wr *wr;
struct tx_sdesc *txsd;
struct cpl_tx_pkt_core *cpl;
uint64_t ctrl1;
int ndesc, i;
struct mbuf *m, *last;
void *flitp;
TXQ_LOCK_ASSERT_OWNED(txq);
MPASS(txp->npkt > 0);
MPASS(txp->wr_type == 1); /* VF supports type 1 only */
MPASS(txp->mb[0] != NULL);
MPASS(txp->len16 <= howmany(SGE_MAX_WR_LEN, 16));
wr = (void *)&eq->desc[eq->pidx];
wr->op_pkd = htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_VM_WR));
wr->equiq_to_len16 = htobe32(V_FW_WR_LEN16(txp->len16));
wr->r3 = 0;
wr->plen = htobe16(txp->plen);
wr->npkt = txp->npkt;
wr->r4 = 0;
memcpy(&wr->ethmacdst[0], &txp->ethmacdst[0], 16);
flitp = wr + 1;
/*
* At this point we are 32B into a hardware descriptor. Each mbuf in
* the WR will take 32B so we check for the end of the descriptor ring
* before writing odd mbufs (mb[1], 3, 5, ..)
*/
ndesc = tx_len16_to_desc(txp->len16);
last = NULL;
for (i = 0; i < txp->npkt; i++) {
m = txp->mb[i];
if (i & 1 && (uintptr_t)flitp == (uintptr_t)&eq->desc[eq->sidx])
flitp = &eq->desc[0];
cpl = flitp;
/* Checksum offload */
ctrl1 = csum_to_ctrl(sc, m);
if (ctrl1 != (F_TXPKT_IPCSUM_DIS | F_TXPKT_L4CSUM_DIS))
txq->txcsum++; /* some hardware assistance provided */
/* VLAN tag insertion */
if (needs_vlan_insertion(m)) {
ctrl1 |= F_TXPKT_VLAN_VLD |
V_TXPKT_VLAN(m->m_pkthdr.ether_vtag);
txq->vlan_insertion++;
}
/* CPL header */
cpl->ctrl0 = txq->cpl_ctrl0;
cpl->pack = 0;
cpl->len = htobe16(m->m_pkthdr.len);
cpl->ctrl1 = htobe64(ctrl1);
flitp = cpl + 1;
MPASS(mbuf_nsegs(m) == 1);
write_gl_to_txd(txq, m, (caddr_t *)(&flitp), 0);
if (last != NULL)
last->m_nextpkt = m;
last = m;
}
txq->sgl_wrs++;
txq->txpkts1_pkts += txp->npkt;
txq->txpkts1_wrs++;
txsd = &txq->sdesc[eq->pidx];
txsd->m = txp->mb[0];
txsd->desc_used = ndesc;
return (ndesc);
}
/*
* If the SGL ends on an address that is not 16 byte aligned, this function will
* add a 0 filled flit at the end.
*/
static void
write_gl_to_txd(struct sge_txq *txq, struct mbuf *m, caddr_t *to, int checkwrap)
{
struct sge_eq *eq = &txq->eq;
struct sglist *gl = txq->gl;
struct sglist_seg *seg;
__be64 *flitp, *wrap;
struct ulptx_sgl *usgl;
int i, nflits, nsegs;
KASSERT(((uintptr_t)(*to) & 0xf) == 0,
("%s: SGL must start at a 16 byte boundary: %p", __func__, *to));
MPASS((uintptr_t)(*to) >= (uintptr_t)&eq->desc[0]);
MPASS((uintptr_t)(*to) < (uintptr_t)&eq->desc[eq->sidx]);
get_pkt_gl(m, gl);
nsegs = gl->sg_nseg;
MPASS(nsegs > 0);
nflits = (3 * (nsegs - 1)) / 2 + ((nsegs - 1) & 1) + 2;
flitp = (__be64 *)(*to);
wrap = (__be64 *)(&eq->desc[eq->sidx]);
seg = &gl->sg_segs[0];
usgl = (void *)flitp;
/*
* We start at a 16 byte boundary somewhere inside the tx descriptor
* ring, so we're at least 16 bytes away from the status page. There is
* no chance of a wrap around in the middle of usgl (which is 16 bytes).
*/
usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) |
V_ULPTX_NSGE(nsegs));
usgl->len0 = htobe32(seg->ss_len);
usgl->addr0 = htobe64(seg->ss_paddr);
seg++;
if (checkwrap == 0 || (uintptr_t)(flitp + nflits) <= (uintptr_t)wrap) {
/* Won't wrap around at all */
for (i = 0; i < nsegs - 1; i++, seg++) {
usgl->sge[i / 2].len[i & 1] = htobe32(seg->ss_len);
usgl->sge[i / 2].addr[i & 1] = htobe64(seg->ss_paddr);
}
if (i & 1)
usgl->sge[i / 2].len[1] = htobe32(0);
flitp += nflits;
} else {
/* Will wrap somewhere in the rest of the SGL */
/* 2 flits already written, write the rest flit by flit */
flitp = (void *)(usgl + 1);
for (i = 0; i < nflits - 2; i++) {
if (flitp == wrap)
flitp = (void *)eq->desc;
*flitp++ = get_flit(seg, nsegs - 1, i);
}
}
if (nflits & 1) {
MPASS(((uintptr_t)flitp) & 0xf);
*flitp++ = 0;
}
MPASS((((uintptr_t)flitp) & 0xf) == 0);
if (__predict_false(flitp == wrap))
*to = (void *)eq->desc;
else
*to = (void *)flitp;
}
static inline void
copy_to_txd(struct sge_eq *eq, caddr_t from, caddr_t *to, int len)
{
MPASS((uintptr_t)(*to) >= (uintptr_t)&eq->desc[0]);
MPASS((uintptr_t)(*to) < (uintptr_t)&eq->desc[eq->sidx]);
if (__predict_true((uintptr_t)(*to) + len <=
(uintptr_t)&eq->desc[eq->sidx])) {
bcopy(from, *to, len);
(*to) += len;
} else {
int portion = (uintptr_t)&eq->desc[eq->sidx] - (uintptr_t)(*to);
bcopy(from, *to, portion);
from += portion;
portion = len - portion; /* remaining */
bcopy(from, (void *)eq->desc, portion);
(*to) = (caddr_t)eq->desc + portion;
}
}
static inline void
ring_eq_db(struct adapter *sc, struct sge_eq *eq, u_int n)
{
u_int db;
MPASS(n > 0);
db = eq->doorbells;
if (n > 1)
clrbit(&db, DOORBELL_WCWR);
wmb();
switch (ffs(db) - 1) {
case DOORBELL_UDB:
*eq->udb = htole32(V_QID(eq->udb_qid) | V_PIDX(n));
break;
case DOORBELL_WCWR: {
volatile uint64_t *dst, *src;
int i;
/*
* Queues whose 128B doorbell segment fits in the page do not
* use relative qid (udb_qid is always 0). Only queues with
* doorbell segments can do WCWR.
*/
KASSERT(eq->udb_qid == 0 && n == 1,
("%s: inappropriate doorbell (0x%x, %d, %d) for eq %p",
__func__, eq->doorbells, n, eq->dbidx, eq));
dst = (volatile void *)((uintptr_t)eq->udb + UDBS_WR_OFFSET -
UDBS_DB_OFFSET);
i = eq->dbidx;
src = (void *)&eq->desc[i];
while (src != (void *)&eq->desc[i + 1])
*dst++ = *src++;
wmb();
break;
}
case DOORBELL_UDBWC:
*eq->udb = htole32(V_QID(eq->udb_qid) | V_PIDX(n));
wmb();
break;
case DOORBELL_KDB:
t4_write_reg(sc, sc->sge_kdoorbell_reg,
V_QID(eq->cntxt_id) | V_PIDX(n));
break;
}
IDXINCR(eq->dbidx, n, eq->sidx);
}
static inline u_int
reclaimable_tx_desc(struct sge_eq *eq)
{
uint16_t hw_cidx;
hw_cidx = read_hw_cidx(eq);
return (IDXDIFF(hw_cidx, eq->cidx, eq->sidx));
}
static inline u_int
total_available_tx_desc(struct sge_eq *eq)
{
uint16_t hw_cidx, pidx;
hw_cidx = read_hw_cidx(eq);
pidx = eq->pidx;
if (pidx == hw_cidx)
return (eq->sidx - 1);
else
return (IDXDIFF(hw_cidx, pidx, eq->sidx) - 1);
}
static inline uint16_t
read_hw_cidx(struct sge_eq *eq)
{
struct sge_qstat *spg = (void *)&eq->desc[eq->sidx];
uint16_t cidx = spg->cidx; /* stable snapshot */
return (be16toh(cidx));
}
/*
* Reclaim 'n' descriptors approximately.
*/
static u_int
reclaim_tx_descs(struct sge_txq *txq, u_int n)
{
struct tx_sdesc *txsd;
struct sge_eq *eq = &txq->eq;
u_int can_reclaim, reclaimed;
TXQ_LOCK_ASSERT_OWNED(txq);
MPASS(n > 0);
reclaimed = 0;
can_reclaim = reclaimable_tx_desc(eq);
while (can_reclaim && reclaimed < n) {
int ndesc;
struct mbuf *m, *nextpkt;
txsd = &txq->sdesc[eq->cidx];
ndesc = txsd->desc_used;
/* Firmware doesn't return "partial" credits. */
KASSERT(can_reclaim >= ndesc,
("%s: unexpected number of credits: %d, %d",
__func__, can_reclaim, ndesc));
KASSERT(ndesc != 0,
("%s: descriptor with no credits: cidx %d",
__func__, eq->cidx));
for (m = txsd->m; m != NULL; m = nextpkt) {
nextpkt = m->m_nextpkt;
m->m_nextpkt = NULL;
m_freem(m);
}
reclaimed += ndesc;
can_reclaim -= ndesc;
IDXINCR(eq->cidx, ndesc, eq->sidx);
}
return (reclaimed);
}
static void
tx_reclaim(void *arg, int n)
{
struct sge_txq *txq = arg;
struct sge_eq *eq = &txq->eq;
do {
if (TXQ_TRYLOCK(txq) == 0)
break;
n = reclaim_tx_descs(txq, 32);
if (eq->cidx == eq->pidx)
eq->equeqidx = eq->pidx;
TXQ_UNLOCK(txq);
} while (n > 0);
}
static __be64
get_flit(struct sglist_seg *segs, int nsegs, int idx)
{
int i = (idx / 3) * 2;
switch (idx % 3) {
case 0: {
uint64_t rc;
rc = (uint64_t)segs[i].ss_len << 32;
if (i + 1 < nsegs)
rc |= (uint64_t)(segs[i + 1].ss_len);
return (htobe64(rc));
}
case 1:
return (htobe64(segs[i].ss_paddr));
case 2:
return (htobe64(segs[i + 1].ss_paddr));
}
return (0);
}
static int
find_refill_source(struct adapter *sc, int maxp, bool packing)
{
int i, zidx = -1;
struct rx_buf_info *rxb = &sc->sge.rx_buf_info[0];
if (packing) {
for (i = 0; i < SW_ZONE_SIZES; i++, rxb++) {
if (rxb->hwidx2 == -1)
continue;
if (rxb->size1 < PAGE_SIZE &&
rxb->size1 < largest_rx_cluster)
continue;
if (rxb->size1 > largest_rx_cluster)
break;
MPASS(rxb->size1 - rxb->size2 >= CL_METADATA_SIZE);
if (rxb->size2 >= maxp)
return (i);
zidx = i;
}
} else {
for (i = 0; i < SW_ZONE_SIZES; i++, rxb++) {
if (rxb->hwidx1 == -1)
continue;
if (rxb->size1 > largest_rx_cluster)
break;
if (rxb->size1 >= maxp)
return (i);
zidx = i;
}
}
return (zidx);
}
static void
add_fl_to_sfl(struct adapter *sc, struct sge_fl *fl)
{
mtx_lock(&sc->sfl_lock);
FL_LOCK(fl);
if ((fl->flags & FL_DOOMED) == 0) {
fl->flags |= FL_STARVING;
TAILQ_INSERT_TAIL(&sc->sfl, fl, link);
callout_reset(&sc->sfl_callout, hz / 5, refill_sfl, sc);
}
FL_UNLOCK(fl);
mtx_unlock(&sc->sfl_lock);
}
static void
handle_wrq_egr_update(struct adapter *sc, struct sge_eq *eq)
{
struct sge_wrq *wrq = (void *)eq;
atomic_readandclear_int(&eq->equiq);
taskqueue_enqueue(sc->tq[eq->tx_chan], &wrq->wrq_tx_task);
}
static void
handle_eth_egr_update(struct adapter *sc, struct sge_eq *eq)
{
struct sge_txq *txq = (void *)eq;
MPASS((eq->flags & EQ_TYPEMASK) == EQ_ETH);
atomic_readandclear_int(&eq->equiq);
if (mp_ring_is_idle(txq->r))
taskqueue_enqueue(sc->tq[eq->tx_chan], &txq->tx_reclaim_task);
else
mp_ring_check_drainage(txq->r, 64);
}
static int
handle_sge_egr_update(struct sge_iq *iq, const struct rss_header *rss,
struct mbuf *m)
{
const struct cpl_sge_egr_update *cpl = (const void *)(rss + 1);
unsigned int qid = G_EGR_QID(ntohl(cpl->opcode_qid));
struct adapter *sc = iq->adapter;
struct sge *s = &sc->sge;
struct sge_eq *eq;
static void (*h[])(struct adapter *, struct sge_eq *) = {NULL,
&handle_wrq_egr_update, &handle_eth_egr_update,
&handle_wrq_egr_update};
KASSERT(m == NULL, ("%s: payload with opcode %02x", __func__,
rss->opcode));
eq = s->eqmap[qid - s->eq_start - s->eq_base];
(*h[eq->flags & EQ_TYPEMASK])(sc, eq);
return (0);
}
/* handle_fw_msg works for both fw4_msg and fw6_msg because this is valid */
CTASSERT(offsetof(struct cpl_fw4_msg, data) == \
offsetof(struct cpl_fw6_msg, data));
static int
handle_fw_msg(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m)
{
struct adapter *sc = iq->adapter;
const struct cpl_fw6_msg *cpl = (const void *)(rss + 1);
KASSERT(m == NULL, ("%s: payload with opcode %02x", __func__,
rss->opcode));
if (cpl->type == FW_TYPE_RSSCPL || cpl->type == FW6_TYPE_RSSCPL) {
const struct rss_header *rss2;
rss2 = (const struct rss_header *)&cpl->data[0];
return (t4_cpl_handler[rss2->opcode](iq, rss2, m));
}
return (t4_fw_msg_handler[cpl->type](sc, &cpl->data[0]));
}
/**
* t4_handle_wrerr_rpl - process a FW work request error message
* @adap: the adapter
* @rpl: start of the FW message
*/
static int
t4_handle_wrerr_rpl(struct adapter *adap, const __be64 *rpl)
{
u8 opcode = *(const u8 *)rpl;
const struct fw_error_cmd *e = (const void *)rpl;
unsigned int i;
if (opcode != FW_ERROR_CMD) {
log(LOG_ERR,
"%s: Received WRERR_RPL message with opcode %#x\n",
device_get_nameunit(adap->dev), opcode);
return (EINVAL);
}
log(LOG_ERR, "%s: FW_ERROR (%s) ", device_get_nameunit(adap->dev),
G_FW_ERROR_CMD_FATAL(be32toh(e->op_to_type)) ? "fatal" :
"non-fatal");
switch (G_FW_ERROR_CMD_TYPE(be32toh(e->op_to_type))) {
case FW_ERROR_TYPE_EXCEPTION:
log(LOG_ERR, "exception info:\n");
for (i = 0; i < nitems(e->u.exception.info); i++)
log(LOG_ERR, "%s%08x", i == 0 ? "\t" : " ",
be32toh(e->u.exception.info[i]));
log(LOG_ERR, "\n");
break;
case FW_ERROR_TYPE_HWMODULE:
log(LOG_ERR, "HW module regaddr %08x regval %08x\n",
be32toh(e->u.hwmodule.regaddr),
be32toh(e->u.hwmodule.regval));
break;
case FW_ERROR_TYPE_WR:
log(LOG_ERR, "WR cidx %d PF %d VF %d eqid %d hdr:\n",
be16toh(e->u.wr.cidx),
G_FW_ERROR_CMD_PFN(be16toh(e->u.wr.pfn_vfn)),
G_FW_ERROR_CMD_VFN(be16toh(e->u.wr.pfn_vfn)),
be32toh(e->u.wr.eqid));
for (i = 0; i < nitems(e->u.wr.wrhdr); i++)
log(LOG_ERR, "%s%02x", i == 0 ? "\t" : " ",
e->u.wr.wrhdr[i]);
log(LOG_ERR, "\n");
break;
case FW_ERROR_TYPE_ACL:
log(LOG_ERR, "ACL cidx %d PF %d VF %d eqid %d %s",
be16toh(e->u.acl.cidx),
G_FW_ERROR_CMD_PFN(be16toh(e->u.acl.pfn_vfn)),
G_FW_ERROR_CMD_VFN(be16toh(e->u.acl.pfn_vfn)),
be32toh(e->u.acl.eqid),
G_FW_ERROR_CMD_MV(be16toh(e->u.acl.mv_pkd)) ? "vlanid" :
"MAC");
for (i = 0; i < nitems(e->u.acl.val); i++)
log(LOG_ERR, " %02x", e->u.acl.val[i]);
log(LOG_ERR, "\n");
break;
default:
log(LOG_ERR, "type %#x\n",
G_FW_ERROR_CMD_TYPE(be32toh(e->op_to_type)));
return (EINVAL);
}
return (0);
}
static int
sysctl_uint16(SYSCTL_HANDLER_ARGS)
{
uint16_t *id = arg1;
int i = *id;
return sysctl_handle_int(oidp, &i, 0, req);
}
static inline bool
bufidx_used(struct adapter *sc, int idx)
{
struct rx_buf_info *rxb = &sc->sge.rx_buf_info[0];
int i;
for (i = 0; i < SW_ZONE_SIZES; i++, rxb++) {
if (rxb->size1 > largest_rx_cluster)
continue;
if (rxb->hwidx1 == idx || rxb->hwidx2 == idx)
return (true);
}
return (false);
}
static int
sysctl_bufsizes(SYSCTL_HANDLER_ARGS)
{
struct adapter *sc = arg1;
struct sge_params *sp = &sc->params.sge;
int i, rc;
struct sbuf sb;
char c;
sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND);
for (i = 0; i < SGE_FLBUF_SIZES; i++) {
if (bufidx_used(sc, i))
c = '*';
else
c = '\0';
sbuf_printf(&sb, "%u%c ", sp->sge_fl_buffer_size[i], c);
}
sbuf_trim(&sb);
sbuf_finish(&sb);
rc = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
sbuf_delete(&sb);
return (rc);
}
#ifdef RATELIMIT
/*
* len16 for a txpkt WR with a GL. Includes the firmware work request header.
*/
static inline u_int
txpkt_eo_len16(u_int nsegs, u_int immhdrs, u_int tso)
{
u_int n;
MPASS(immhdrs > 0);
n = roundup2(sizeof(struct fw_eth_tx_eo_wr) +
sizeof(struct cpl_tx_pkt_core) + immhdrs, 16);
if (__predict_false(nsegs == 0))
goto done;
nsegs--; /* first segment is part of ulptx_sgl */
n += sizeof(struct ulptx_sgl) + 8 * ((3 * nsegs) / 2 + (nsegs & 1));
if (tso)
n += sizeof(struct cpl_tx_pkt_lso_core);
done:
return (howmany(n, 16));
}
#define ETID_FLOWC_NPARAMS 6
#define ETID_FLOWC_LEN (roundup2((sizeof(struct fw_flowc_wr) + \
ETID_FLOWC_NPARAMS * sizeof(struct fw_flowc_mnemval)), 16))
#define ETID_FLOWC_LEN16 (howmany(ETID_FLOWC_LEN, 16))
static int
send_etid_flowc_wr(struct cxgbe_rate_tag *cst, struct port_info *pi,
struct vi_info *vi)
{
struct wrq_cookie cookie;
u_int pfvf = pi->adapter->pf << S_FW_VIID_PFN;
struct fw_flowc_wr *flowc;
mtx_assert(&cst->lock, MA_OWNED);
MPASS((cst->flags & (EO_FLOWC_PENDING | EO_FLOWC_RPL_PENDING)) ==
EO_FLOWC_PENDING);
flowc = start_wrq_wr(cst->eo_txq, ETID_FLOWC_LEN16, &cookie);
if (__predict_false(flowc == NULL))
return (ENOMEM);
bzero(flowc, ETID_FLOWC_LEN);
flowc->op_to_nparams = htobe32(V_FW_WR_OP(FW_FLOWC_WR) |
V_FW_FLOWC_WR_NPARAMS(ETID_FLOWC_NPARAMS) | V_FW_WR_COMPL(0));
flowc->flowid_len16 = htonl(V_FW_WR_LEN16(ETID_FLOWC_LEN16) |
V_FW_WR_FLOWID(cst->etid));
flowc->mnemval[0].mnemonic = FW_FLOWC_MNEM_PFNVFN;
flowc->mnemval[0].val = htobe32(pfvf);
flowc->mnemval[1].mnemonic = FW_FLOWC_MNEM_CH;
flowc->mnemval[1].val = htobe32(pi->tx_chan);
flowc->mnemval[2].mnemonic = FW_FLOWC_MNEM_PORT;
flowc->mnemval[2].val = htobe32(pi->tx_chan);
flowc->mnemval[3].mnemonic = FW_FLOWC_MNEM_IQID;
flowc->mnemval[3].val = htobe32(cst->iqid);
flowc->mnemval[4].mnemonic = FW_FLOWC_MNEM_EOSTATE;
flowc->mnemval[4].val = htobe32(FW_FLOWC_MNEM_EOSTATE_ESTABLISHED);
flowc->mnemval[5].mnemonic = FW_FLOWC_MNEM_SCHEDCLASS;
flowc->mnemval[5].val = htobe32(cst->schedcl);
commit_wrq_wr(cst->eo_txq, flowc, &cookie);
cst->flags &= ~EO_FLOWC_PENDING;
cst->flags |= EO_FLOWC_RPL_PENDING;
MPASS(cst->tx_credits >= ETID_FLOWC_LEN16); /* flowc is first WR. */
cst->tx_credits -= ETID_FLOWC_LEN16;
return (0);
}
#define ETID_FLUSH_LEN16 (howmany(sizeof (struct fw_flowc_wr), 16))
void
send_etid_flush_wr(struct cxgbe_rate_tag *cst)
{
struct fw_flowc_wr *flowc;
struct wrq_cookie cookie;
mtx_assert(&cst->lock, MA_OWNED);
flowc = start_wrq_wr(cst->eo_txq, ETID_FLUSH_LEN16, &cookie);
if (__predict_false(flowc == NULL))
CXGBE_UNIMPLEMENTED(__func__);
bzero(flowc, ETID_FLUSH_LEN16 * 16);
flowc->op_to_nparams = htobe32(V_FW_WR_OP(FW_FLOWC_WR) |
V_FW_FLOWC_WR_NPARAMS(0) | F_FW_WR_COMPL);
flowc->flowid_len16 = htobe32(V_FW_WR_LEN16(ETID_FLUSH_LEN16) |
V_FW_WR_FLOWID(cst->etid));
commit_wrq_wr(cst->eo_txq, flowc, &cookie);
cst->flags |= EO_FLUSH_RPL_PENDING;
MPASS(cst->tx_credits >= ETID_FLUSH_LEN16);
cst->tx_credits -= ETID_FLUSH_LEN16;
cst->ncompl++;
}
static void
write_ethofld_wr(struct cxgbe_rate_tag *cst, struct fw_eth_tx_eo_wr *wr,
struct mbuf *m0, int compl)
{
struct cpl_tx_pkt_core *cpl;
uint64_t ctrl1;
uint32_t ctrl; /* used in many unrelated places */
int len16, pktlen, nsegs, immhdrs;
caddr_t dst;
uintptr_t p;
struct ulptx_sgl *usgl;
struct sglist sg;
struct sglist_seg segs[38]; /* XXX: find real limit. XXX: get off the stack */
mtx_assert(&cst->lock, MA_OWNED);
M_ASSERTPKTHDR(m0);
KASSERT(m0->m_pkthdr.l2hlen > 0 && m0->m_pkthdr.l3hlen > 0 &&
m0->m_pkthdr.l4hlen > 0,
("%s: ethofld mbuf %p is missing header lengths", __func__, m0));
len16 = mbuf_eo_len16(m0);
nsegs = mbuf_eo_nsegs(m0);
pktlen = m0->m_pkthdr.len;
ctrl = sizeof(struct cpl_tx_pkt_core);
if (needs_tso(m0))
ctrl += sizeof(struct cpl_tx_pkt_lso_core);
immhdrs = m0->m_pkthdr.l2hlen + m0->m_pkthdr.l3hlen + m0->m_pkthdr.l4hlen;
ctrl += immhdrs;
wr->op_immdlen = htobe32(V_FW_WR_OP(FW_ETH_TX_EO_WR) |
V_FW_ETH_TX_EO_WR_IMMDLEN(ctrl) | V_FW_WR_COMPL(!!compl));
wr->equiq_to_len16 = htobe32(V_FW_WR_LEN16(len16) |
V_FW_WR_FLOWID(cst->etid));
wr->r3 = 0;
if (needs_outer_udp_csum(m0)) {
wr->u.udpseg.type = FW_ETH_TX_EO_TYPE_UDPSEG;
wr->u.udpseg.ethlen = m0->m_pkthdr.l2hlen;
wr->u.udpseg.iplen = htobe16(m0->m_pkthdr.l3hlen);
wr->u.udpseg.udplen = m0->m_pkthdr.l4hlen;
wr->u.udpseg.rtplen = 0;
wr->u.udpseg.r4 = 0;
wr->u.udpseg.mss = htobe16(pktlen - immhdrs);
wr->u.udpseg.schedpktsize = wr->u.udpseg.mss;
wr->u.udpseg.plen = htobe32(pktlen - immhdrs);
cpl = (void *)(wr + 1);
} else {
MPASS(needs_outer_tcp_csum(m0));
wr->u.tcpseg.type = FW_ETH_TX_EO_TYPE_TCPSEG;
wr->u.tcpseg.ethlen = m0->m_pkthdr.l2hlen;
wr->u.tcpseg.iplen = htobe16(m0->m_pkthdr.l3hlen);
wr->u.tcpseg.tcplen = m0->m_pkthdr.l4hlen;
wr->u.tcpseg.tsclk_tsoff = mbuf_eo_tsclk_tsoff(m0);
wr->u.tcpseg.r4 = 0;
wr->u.tcpseg.r5 = 0;
wr->u.tcpseg.plen = htobe32(pktlen - immhdrs);
if (needs_tso(m0)) {
struct cpl_tx_pkt_lso_core *lso = (void *)(wr + 1);
wr->u.tcpseg.mss = htobe16(m0->m_pkthdr.tso_segsz);
ctrl = V_LSO_OPCODE(CPL_TX_PKT_LSO) |
F_LSO_FIRST_SLICE | F_LSO_LAST_SLICE |
V_LSO_ETHHDR_LEN((m0->m_pkthdr.l2hlen -
ETHER_HDR_LEN) >> 2) |
V_LSO_IPHDR_LEN(m0->m_pkthdr.l3hlen >> 2) |
V_LSO_TCPHDR_LEN(m0->m_pkthdr.l4hlen >> 2);
if (m0->m_pkthdr.l3hlen == sizeof(struct ip6_hdr))
ctrl |= F_LSO_IPV6;
lso->lso_ctrl = htobe32(ctrl);
lso->ipid_ofst = htobe16(0);
lso->mss = htobe16(m0->m_pkthdr.tso_segsz);
lso->seqno_offset = htobe32(0);
lso->len = htobe32(pktlen);
cpl = (void *)(lso + 1);
} else {
wr->u.tcpseg.mss = htobe16(0xffff);
cpl = (void *)(wr + 1);
}
}
/* Checksum offload must be requested for ethofld. */
MPASS(needs_outer_l4_csum(m0));
ctrl1 = csum_to_ctrl(cst->adapter, m0);
/* VLAN tag insertion */
if (needs_vlan_insertion(m0)) {
ctrl1 |= F_TXPKT_VLAN_VLD |
V_TXPKT_VLAN(m0->m_pkthdr.ether_vtag);
}
/* CPL header */
cpl->ctrl0 = cst->ctrl0;
cpl->pack = 0;
cpl->len = htobe16(pktlen);
cpl->ctrl1 = htobe64(ctrl1);
/* Copy Ethernet, IP & TCP/UDP hdrs as immediate data */
p = (uintptr_t)(cpl + 1);
m_copydata(m0, 0, immhdrs, (void *)p);
/* SGL */
dst = (void *)(cpl + 1);
if (nsegs > 0) {
int i, pad;
/* zero-pad upto next 16Byte boundary, if not 16Byte aligned */
p += immhdrs;
pad = 16 - (immhdrs & 0xf);
bzero((void *)p, pad);
usgl = (void *)(p + pad);
usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) |
V_ULPTX_NSGE(nsegs));
sglist_init(&sg, nitems(segs), segs);
for (; m0 != NULL; m0 = m0->m_next) {
if (__predict_false(m0->m_len == 0))
continue;
if (immhdrs >= m0->m_len) {
immhdrs -= m0->m_len;
continue;
}
if (m0->m_flags & M_EXTPG)
sglist_append_mbuf_epg(&sg, m0,
mtod(m0, vm_offset_t), m0->m_len);
else
sglist_append(&sg, mtod(m0, char *) + immhdrs,
m0->m_len - immhdrs);
immhdrs = 0;
}
MPASS(sg.sg_nseg == nsegs);
/*
* Zero pad last 8B in case the WR doesn't end on a 16B
* boundary.
*/
*(uint64_t *)((char *)wr + len16 * 16 - 8) = 0;
usgl->len0 = htobe32(segs[0].ss_len);
usgl->addr0 = htobe64(segs[0].ss_paddr);
for (i = 0; i < nsegs - 1; i++) {
usgl->sge[i / 2].len[i & 1] = htobe32(segs[i + 1].ss_len);
usgl->sge[i / 2].addr[i & 1] = htobe64(segs[i + 1].ss_paddr);
}
if (i & 1)
usgl->sge[i / 2].len[1] = htobe32(0);
}
}
static void
ethofld_tx(struct cxgbe_rate_tag *cst)
{
struct mbuf *m;
struct wrq_cookie cookie;
int next_credits, compl;
struct fw_eth_tx_eo_wr *wr;
mtx_assert(&cst->lock, MA_OWNED);
while ((m = mbufq_first(&cst->pending_tx)) != NULL) {
M_ASSERTPKTHDR(m);
/* How many len16 credits do we need to send this mbuf. */
next_credits = mbuf_eo_len16(m);
MPASS(next_credits > 0);
if (next_credits > cst->tx_credits) {
/*
* Tx will make progress eventually because there is at
* least one outstanding fw4_ack that will return
* credits and kick the tx.
*/
MPASS(cst->ncompl > 0);
return;
}
wr = start_wrq_wr(cst->eo_txq, next_credits, &cookie);
if (__predict_false(wr == NULL)) {
/* XXX: wishful thinking, not a real assertion. */
MPASS(cst->ncompl > 0);
return;
}
cst->tx_credits -= next_credits;
cst->tx_nocompl += next_credits;
compl = cst->ncompl == 0 || cst->tx_nocompl >= cst->tx_total / 2;
ETHER_BPF_MTAP(cst->com.com.ifp, m);
write_ethofld_wr(cst, wr, m, compl);
commit_wrq_wr(cst->eo_txq, wr, &cookie);
if (compl) {
cst->ncompl++;
cst->tx_nocompl = 0;
}
(void) mbufq_dequeue(&cst->pending_tx);
/*
* Drop the mbuf's reference on the tag now rather
* than waiting until m_freem(). This ensures that
* cxgbe_rate_tag_free gets called when the inp drops
* its reference on the tag and there are no more
* mbufs in the pending_tx queue and can flush any
* pending requests. Otherwise if the last mbuf
* doesn't request a completion the etid will never be
* released.
*/
m->m_pkthdr.snd_tag = NULL;
m->m_pkthdr.csum_flags &= ~CSUM_SND_TAG;
m_snd_tag_rele(&cst->com.com);
mbufq_enqueue(&cst->pending_fwack, m);
}
}
int
ethofld_transmit(struct ifnet *ifp, struct mbuf *m0)
{
struct cxgbe_rate_tag *cst;
int rc;
MPASS(m0->m_nextpkt == NULL);
MPASS(m0->m_pkthdr.csum_flags & CSUM_SND_TAG);
MPASS(m0->m_pkthdr.snd_tag != NULL);
cst = mst_to_crt(m0->m_pkthdr.snd_tag);
mtx_lock(&cst->lock);
MPASS(cst->flags & EO_SND_TAG_REF);
if (__predict_false(cst->flags & EO_FLOWC_PENDING)) {
struct vi_info *vi = ifp->if_softc;
struct port_info *pi = vi->pi;
struct adapter *sc = pi->adapter;
const uint32_t rss_mask = vi->rss_size - 1;
uint32_t rss_hash;
cst->eo_txq = &sc->sge.ofld_txq[vi->first_ofld_txq];
if (M_HASHTYPE_ISHASH(m0))
rss_hash = m0->m_pkthdr.flowid;
else
rss_hash = arc4random();
/* We assume RSS hashing */
cst->iqid = vi->rss[rss_hash & rss_mask];
cst->eo_txq += rss_hash % vi->nofldtxq;
rc = send_etid_flowc_wr(cst, pi, vi);
if (rc != 0)
goto done;
}
if (__predict_false(cst->plen + m0->m_pkthdr.len > eo_max_backlog)) {
rc = ENOBUFS;
goto done;
}
mbufq_enqueue(&cst->pending_tx, m0);
cst->plen += m0->m_pkthdr.len;
/*
* Hold an extra reference on the tag while generating work
* requests to ensure that we don't try to free the tag during
* ethofld_tx() in case we are sending the final mbuf after
* the inp was freed.
*/
m_snd_tag_ref(&cst->com.com);
ethofld_tx(cst);
mtx_unlock(&cst->lock);
m_snd_tag_rele(&cst->com.com);
return (0);
done:
mtx_unlock(&cst->lock);
if (__predict_false(rc != 0))
m_freem(m0);
return (rc);
}
static int
ethofld_fw4_ack(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m0)
{
struct adapter *sc = iq->adapter;
const struct cpl_fw4_ack *cpl = (const void *)(rss + 1);
struct mbuf *m;
u_int etid = G_CPL_FW4_ACK_FLOWID(be32toh(OPCODE_TID(cpl)));
struct cxgbe_rate_tag *cst;
uint8_t credits = cpl->credits;
cst = lookup_etid(sc, etid);
mtx_lock(&cst->lock);
if (__predict_false(cst->flags & EO_FLOWC_RPL_PENDING)) {
MPASS(credits >= ETID_FLOWC_LEN16);
credits -= ETID_FLOWC_LEN16;
cst->flags &= ~EO_FLOWC_RPL_PENDING;
}
KASSERT(cst->ncompl > 0,
("%s: etid %u (%p) wasn't expecting completion.",
__func__, etid, cst));
cst->ncompl--;
while (credits > 0) {
m = mbufq_dequeue(&cst->pending_fwack);
if (__predict_false(m == NULL)) {
/*
* The remaining credits are for the final flush that
* was issued when the tag was freed by the kernel.
*/
MPASS((cst->flags &
(EO_FLUSH_RPL_PENDING | EO_SND_TAG_REF)) ==
EO_FLUSH_RPL_PENDING);
MPASS(credits == ETID_FLUSH_LEN16);
MPASS(cst->tx_credits + cpl->credits == cst->tx_total);
MPASS(cst->ncompl == 0);
cst->flags &= ~EO_FLUSH_RPL_PENDING;
cst->tx_credits += cpl->credits;
cxgbe_rate_tag_free_locked(cst);
return (0); /* cst is gone. */
}
KASSERT(m != NULL,
("%s: too many credits (%u, %u)", __func__, cpl->credits,
credits));
KASSERT(credits >= mbuf_eo_len16(m),
("%s: too few credits (%u, %u, %u)", __func__,
cpl->credits, credits, mbuf_eo_len16(m)));
credits -= mbuf_eo_len16(m);
cst->plen -= m->m_pkthdr.len;
m_freem(m);
}
cst->tx_credits += cpl->credits;
MPASS(cst->tx_credits <= cst->tx_total);
if (cst->flags & EO_SND_TAG_REF) {
/*
* As with ethofld_transmit(), hold an extra reference
* so that the tag is stable across ethold_tx().
*/
m_snd_tag_ref(&cst->com.com);
m = mbufq_first(&cst->pending_tx);
if (m != NULL && cst->tx_credits >= mbuf_eo_len16(m))
ethofld_tx(cst);
mtx_unlock(&cst->lock);
m_snd_tag_rele(&cst->com.com);
} else {
/*
* There shouldn't be any pending packets if the tag
* was freed by the kernel since any pending packet
* should hold a reference to the tag.
*/
MPASS(mbufq_first(&cst->pending_tx) == NULL);
mtx_unlock(&cst->lock);
}
return (0);
}
#endif
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