Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1 | /***************************************************************************** |
| 2 | * * |
| 3 | * File: sge.c * |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 4 | * $Revision: 1.26 $ * |
| 5 | * $Date: 2005/06/21 18:29:48 $ * |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 6 | * Description: * |
| 7 | * DMA engine. * |
| 8 | * part of the Chelsio 10Gb Ethernet Driver. * |
| 9 | * * |
| 10 | * This program is free software; you can redistribute it and/or modify * |
| 11 | * it under the terms of the GNU General Public License, version 2, as * |
| 12 | * published by the Free Software Foundation. * |
| 13 | * * |
| 14 | * You should have received a copy of the GNU General Public License along * |
| 15 | * with this program; if not, write to the Free Software Foundation, Inc., * |
| 16 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * |
| 17 | * * |
| 18 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * |
| 19 | * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * |
| 20 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * |
| 21 | * * |
| 22 | * http://www.chelsio.com * |
| 23 | * * |
| 24 | * Copyright (c) 2003 - 2005 Chelsio Communications, Inc. * |
| 25 | * All rights reserved. * |
| 26 | * * |
| 27 | * Maintainers: maintainers@chelsio.com * |
| 28 | * * |
| 29 | * Authors: Dimitrios Michailidis <dm@chelsio.com> * |
| 30 | * Tina Yang <tainay@chelsio.com> * |
| 31 | * Felix Marti <felix@chelsio.com> * |
| 32 | * Scott Bardone <sbardone@chelsio.com> * |
| 33 | * Kurt Ottaway <kottaway@chelsio.com> * |
| 34 | * Frank DiMambro <frank@chelsio.com> * |
| 35 | * * |
| 36 | * History: * |
| 37 | * * |
| 38 | ****************************************************************************/ |
| 39 | |
| 40 | #include "common.h" |
| 41 | |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 42 | #include <linux/types.h> |
| 43 | #include <linux/errno.h> |
| 44 | #include <linux/pci.h> |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 45 | #include <linux/ktime.h> |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 46 | #include <linux/netdevice.h> |
| 47 | #include <linux/etherdevice.h> |
| 48 | #include <linux/if_vlan.h> |
| 49 | #include <linux/skbuff.h> |
| 50 | #include <linux/init.h> |
| 51 | #include <linux/mm.h> |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 52 | #include <linux/tcp.h> |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 53 | #include <linux/ip.h> |
| 54 | #include <linux/in.h> |
| 55 | #include <linux/if_arp.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 56 | #include <linux/slab.h> |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 57 | |
| 58 | #include "cpl5_cmd.h" |
| 59 | #include "sge.h" |
| 60 | #include "regs.h" |
| 61 | #include "espi.h" |
| 62 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 63 | /* This belongs in if_ether.h */ |
| 64 | #define ETH_P_CPL5 0xf |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 65 | |
| 66 | #define SGE_CMDQ_N 2 |
| 67 | #define SGE_FREELQ_N 2 |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 68 | #define SGE_CMDQ0_E_N 1024 |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 69 | #define SGE_CMDQ1_E_N 128 |
| 70 | #define SGE_FREEL_SIZE 4096 |
| 71 | #define SGE_JUMBO_FREEL_SIZE 512 |
| 72 | #define SGE_FREEL_REFILL_THRESH 16 |
| 73 | #define SGE_RESPQ_E_N 1024 |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 74 | #define SGE_INTRTIMER_NRES 1000 |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 75 | #define SGE_RX_SM_BUF_SIZE 1536 |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 76 | #define SGE_TX_DESC_MAX_PLEN 16384 |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 77 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 78 | #define SGE_RESPQ_REPLENISH_THRES (SGE_RESPQ_E_N / 4) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 79 | |
| 80 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 81 | * Period of the TX buffer reclaim timer. This timer does not need to run |
| 82 | * frequently as TX buffers are usually reclaimed by new TX packets. |
| 83 | */ |
| 84 | #define TX_RECLAIM_PERIOD (HZ / 4) |
| 85 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 86 | #define M_CMD_LEN 0x7fffffff |
| 87 | #define V_CMD_LEN(v) (v) |
| 88 | #define G_CMD_LEN(v) ((v) & M_CMD_LEN) |
| 89 | #define V_CMD_GEN1(v) ((v) << 31) |
| 90 | #define V_CMD_GEN2(v) (v) |
| 91 | #define F_CMD_DATAVALID (1 << 1) |
| 92 | #define F_CMD_SOP (1 << 2) |
| 93 | #define V_CMD_EOP(v) ((v) << 3) |
| 94 | |
| 95 | /* |
| 96 | * Command queue, receive buffer list, and response queue descriptors. |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 97 | */ |
| 98 | #if defined(__BIG_ENDIAN_BITFIELD) |
| 99 | struct cmdQ_e { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 100 | u32 addr_lo; |
| 101 | u32 len_gen; |
| 102 | u32 flags; |
| 103 | u32 addr_hi; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 104 | }; |
| 105 | |
| 106 | struct freelQ_e { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 107 | u32 addr_lo; |
| 108 | u32 len_gen; |
| 109 | u32 gen2; |
| 110 | u32 addr_hi; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 111 | }; |
| 112 | |
| 113 | struct respQ_e { |
| 114 | u32 Qsleeping : 4; |
| 115 | u32 Cmdq1CreditReturn : 5; |
| 116 | u32 Cmdq1DmaComplete : 5; |
| 117 | u32 Cmdq0CreditReturn : 5; |
| 118 | u32 Cmdq0DmaComplete : 5; |
| 119 | u32 FreelistQid : 2; |
| 120 | u32 CreditValid : 1; |
| 121 | u32 DataValid : 1; |
| 122 | u32 Offload : 1; |
| 123 | u32 Eop : 1; |
| 124 | u32 Sop : 1; |
| 125 | u32 GenerationBit : 1; |
| 126 | u32 BufferLength; |
| 127 | }; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 128 | #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| 129 | struct cmdQ_e { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 130 | u32 len_gen; |
| 131 | u32 addr_lo; |
| 132 | u32 addr_hi; |
| 133 | u32 flags; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 134 | }; |
| 135 | |
| 136 | struct freelQ_e { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 137 | u32 len_gen; |
| 138 | u32 addr_lo; |
| 139 | u32 addr_hi; |
| 140 | u32 gen2; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 141 | }; |
| 142 | |
| 143 | struct respQ_e { |
| 144 | u32 BufferLength; |
| 145 | u32 GenerationBit : 1; |
| 146 | u32 Sop : 1; |
| 147 | u32 Eop : 1; |
| 148 | u32 Offload : 1; |
| 149 | u32 DataValid : 1; |
| 150 | u32 CreditValid : 1; |
| 151 | u32 FreelistQid : 2; |
| 152 | u32 Cmdq0DmaComplete : 5; |
| 153 | u32 Cmdq0CreditReturn : 5; |
| 154 | u32 Cmdq1DmaComplete : 5; |
| 155 | u32 Cmdq1CreditReturn : 5; |
| 156 | u32 Qsleeping : 4; |
| 157 | } ; |
| 158 | #endif |
| 159 | |
| 160 | /* |
| 161 | * SW Context Command and Freelist Queue Descriptors |
| 162 | */ |
| 163 | struct cmdQ_ce { |
| 164 | struct sk_buff *skb; |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 165 | DEFINE_DMA_UNMAP_ADDR(dma_addr); |
| 166 | DEFINE_DMA_UNMAP_LEN(dma_len); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 167 | }; |
| 168 | |
| 169 | struct freelQ_ce { |
| 170 | struct sk_buff *skb; |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 171 | DEFINE_DMA_UNMAP_ADDR(dma_addr); |
| 172 | DEFINE_DMA_UNMAP_LEN(dma_len); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 173 | }; |
| 174 | |
| 175 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 176 | * SW command, freelist and response rings |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 177 | */ |
| 178 | struct cmdQ { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 179 | unsigned long status; /* HW DMA fetch status */ |
| 180 | unsigned int in_use; /* # of in-use command descriptors */ |
| 181 | unsigned int size; /* # of descriptors */ |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 182 | unsigned int processed; /* total # of descs HW has processed */ |
| 183 | unsigned int cleaned; /* total # of descs SW has reclaimed */ |
| 184 | unsigned int stop_thres; /* SW TX queue suspend threshold */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 185 | u16 pidx; /* producer index (SW) */ |
| 186 | u16 cidx; /* consumer index (HW) */ |
| 187 | u8 genbit; /* current generation (=valid) bit */ |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 188 | u8 sop; /* is next entry start of packet? */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 189 | struct cmdQ_e *entries; /* HW command descriptor Q */ |
| 190 | struct cmdQ_ce *centries; /* SW command context descriptor Q */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 191 | dma_addr_t dma_addr; /* DMA addr HW command descriptor Q */ |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 192 | spinlock_t lock; /* Lock to protect cmdQ enqueuing */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 193 | }; |
| 194 | |
| 195 | struct freelQ { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 196 | unsigned int credits; /* # of available RX buffers */ |
| 197 | unsigned int size; /* free list capacity */ |
| 198 | u16 pidx; /* producer index (SW) */ |
| 199 | u16 cidx; /* consumer index (HW) */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 200 | u16 rx_buffer_size; /* Buffer size on this free list */ |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 201 | u16 dma_offset; /* DMA offset to align IP headers */ |
| 202 | u16 recycleq_idx; /* skb recycle q to use */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 203 | u8 genbit; /* current generation (=valid) bit */ |
| 204 | struct freelQ_e *entries; /* HW freelist descriptor Q */ |
| 205 | struct freelQ_ce *centries; /* SW freelist context descriptor Q */ |
| 206 | dma_addr_t dma_addr; /* DMA addr HW freelist descriptor Q */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 207 | }; |
| 208 | |
| 209 | struct respQ { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 210 | unsigned int credits; /* credits to be returned to SGE */ |
| 211 | unsigned int size; /* # of response Q descriptors */ |
| 212 | u16 cidx; /* consumer index (SW) */ |
| 213 | u8 genbit; /* current generation(=valid) bit */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 214 | struct respQ_e *entries; /* HW response descriptor Q */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 215 | dma_addr_t dma_addr; /* DMA addr HW response descriptor Q */ |
| 216 | }; |
| 217 | |
| 218 | /* Bit flags for cmdQ.status */ |
| 219 | enum { |
| 220 | CMDQ_STAT_RUNNING = 1, /* fetch engine is running */ |
| 221 | CMDQ_STAT_LAST_PKT_DB = 2 /* last packet rung the doorbell */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 222 | }; |
| 223 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 224 | /* T204 TX SW scheduler */ |
| 225 | |
| 226 | /* Per T204 TX port */ |
| 227 | struct sched_port { |
| 228 | unsigned int avail; /* available bits - quota */ |
| 229 | unsigned int drain_bits_per_1024ns; /* drain rate */ |
| 230 | unsigned int speed; /* drain rate, mbps */ |
| 231 | unsigned int mtu; /* mtu size */ |
| 232 | struct sk_buff_head skbq; /* pending skbs */ |
| 233 | }; |
| 234 | |
| 235 | /* Per T204 device */ |
| 236 | struct sched { |
| 237 | ktime_t last_updated; /* last time quotas were computed */ |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 238 | unsigned int max_avail; /* max bits to be sent to any port */ |
| 239 | unsigned int port; /* port index (round robin ports) */ |
| 240 | unsigned int num; /* num skbs in per port queues */ |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 241 | struct sched_port p[MAX_NPORTS]; |
| 242 | struct tasklet_struct sched_tsk;/* tasklet used to run scheduler */ |
| 243 | }; |
| 244 | static void restart_sched(unsigned long); |
| 245 | |
| 246 | |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 247 | /* |
| 248 | * Main SGE data structure |
| 249 | * |
| 250 | * Interrupts are handled by a single CPU and it is likely that on a MP system |
| 251 | * the application is migrated to another CPU. In that scenario, we try to |
Daniel Mack | 3ad2f3f | 2010-02-03 08:01:28 +0800 | [diff] [blame] | 252 | * separate the RX(in irq context) and TX state in order to decrease memory |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 253 | * contention. |
| 254 | */ |
| 255 | struct sge { |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 256 | struct adapter *adapter; /* adapter backpointer */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 257 | struct net_device *netdev; /* netdevice backpointer */ |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 258 | struct freelQ freelQ[SGE_FREELQ_N]; /* buffer free lists */ |
| 259 | struct respQ respQ; /* response Q */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 260 | unsigned long stopped_tx_queues; /* bitmap of suspended Tx queues */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 261 | unsigned int rx_pkt_pad; /* RX padding for L2 packets */ |
| 262 | unsigned int jumbo_fl; /* jumbo freelist Q index */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 263 | unsigned int intrtimer_nres; /* no-resource interrupt timer */ |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 264 | unsigned int fixed_intrtimer;/* non-adaptive interrupt timer */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 265 | struct timer_list tx_reclaim_timer; /* reclaims TX buffers */ |
| 266 | struct timer_list espibug_timer; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 267 | unsigned long espibug_timeout; |
| 268 | struct sk_buff *espibug_skb[MAX_NPORTS]; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 269 | u32 sge_control; /* shadow value of sge control reg */ |
| 270 | struct sge_intr_counts stats; |
Tejun Heo | 47d7427 | 2010-02-16 15:21:08 +0000 | [diff] [blame] | 271 | struct sge_port_stats __percpu *port_stats[MAX_NPORTS]; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 272 | struct sched *tx_sched; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 273 | struct cmdQ cmdQ[SGE_CMDQ_N] ____cacheline_aligned_in_smp; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 274 | }; |
| 275 | |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 276 | /* |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 277 | * stop tasklet and free all pending skb's |
| 278 | */ |
| 279 | static void tx_sched_stop(struct sge *sge) |
| 280 | { |
| 281 | struct sched *s = sge->tx_sched; |
| 282 | int i; |
| 283 | |
| 284 | tasklet_kill(&s->sched_tsk); |
| 285 | |
| 286 | for (i = 0; i < MAX_NPORTS; i++) |
| 287 | __skb_queue_purge(&s->p[s->port].skbq); |
| 288 | } |
| 289 | |
| 290 | /* |
| 291 | * t1_sched_update_parms() is called when the MTU or link speed changes. It |
| 292 | * re-computes scheduler parameters to scope with the change. |
| 293 | */ |
| 294 | unsigned int t1_sched_update_parms(struct sge *sge, unsigned int port, |
| 295 | unsigned int mtu, unsigned int speed) |
| 296 | { |
| 297 | struct sched *s = sge->tx_sched; |
| 298 | struct sched_port *p = &s->p[port]; |
| 299 | unsigned int max_avail_segs; |
| 300 | |
| 301 | pr_debug("t1_sched_update_params mtu=%d speed=%d\n", mtu, speed); |
| 302 | if (speed) |
| 303 | p->speed = speed; |
| 304 | if (mtu) |
| 305 | p->mtu = mtu; |
| 306 | |
| 307 | if (speed || mtu) { |
| 308 | unsigned long long drain = 1024ULL * p->speed * (p->mtu - 40); |
| 309 | do_div(drain, (p->mtu + 50) * 1000); |
| 310 | p->drain_bits_per_1024ns = (unsigned int) drain; |
| 311 | |
| 312 | if (p->speed < 1000) |
| 313 | p->drain_bits_per_1024ns = |
| 314 | 90 * p->drain_bits_per_1024ns / 100; |
| 315 | } |
| 316 | |
| 317 | if (board_info(sge->adapter)->board == CHBT_BOARD_CHT204) { |
| 318 | p->drain_bits_per_1024ns -= 16; |
| 319 | s->max_avail = max(4096U, p->mtu + 16 + 14 + 4); |
| 320 | max_avail_segs = max(1U, 4096 / (p->mtu - 40)); |
| 321 | } else { |
| 322 | s->max_avail = 16384; |
| 323 | max_avail_segs = max(1U, 9000 / (p->mtu - 40)); |
| 324 | } |
| 325 | |
| 326 | pr_debug("t1_sched_update_parms: mtu %u speed %u max_avail %u " |
| 327 | "max_avail_segs %u drain_bits_per_1024ns %u\n", p->mtu, |
| 328 | p->speed, s->max_avail, max_avail_segs, |
| 329 | p->drain_bits_per_1024ns); |
| 330 | |
| 331 | return max_avail_segs * (p->mtu - 40); |
| 332 | } |
| 333 | |
Adrian Bunk | 68d579f | 2007-11-21 15:02:55 -0800 | [diff] [blame] | 334 | #if 0 |
| 335 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 336 | /* |
| 337 | * t1_sched_max_avail_bytes() tells the scheduler the maximum amount of |
| 338 | * data that can be pushed per port. |
| 339 | */ |
| 340 | void t1_sched_set_max_avail_bytes(struct sge *sge, unsigned int val) |
| 341 | { |
| 342 | struct sched *s = sge->tx_sched; |
| 343 | unsigned int i; |
| 344 | |
| 345 | s->max_avail = val; |
| 346 | for (i = 0; i < MAX_NPORTS; i++) |
| 347 | t1_sched_update_parms(sge, i, 0, 0); |
| 348 | } |
| 349 | |
| 350 | /* |
| 351 | * t1_sched_set_drain_bits_per_us() tells the scheduler at which rate a port |
| 352 | * is draining. |
| 353 | */ |
| 354 | void t1_sched_set_drain_bits_per_us(struct sge *sge, unsigned int port, |
| 355 | unsigned int val) |
| 356 | { |
| 357 | struct sched *s = sge->tx_sched; |
| 358 | struct sched_port *p = &s->p[port]; |
| 359 | p->drain_bits_per_1024ns = val * 1024 / 1000; |
| 360 | t1_sched_update_parms(sge, port, 0, 0); |
| 361 | } |
| 362 | |
Adrian Bunk | 68d579f | 2007-11-21 15:02:55 -0800 | [diff] [blame] | 363 | #endif /* 0 */ |
| 364 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 365 | |
| 366 | /* |
| 367 | * get_clock() implements a ns clock (see ktime_get) |
| 368 | */ |
| 369 | static inline ktime_t get_clock(void) |
| 370 | { |
| 371 | struct timespec ts; |
| 372 | |
| 373 | ktime_get_ts(&ts); |
| 374 | return timespec_to_ktime(ts); |
| 375 | } |
| 376 | |
| 377 | /* |
| 378 | * tx_sched_init() allocates resources and does basic initialization. |
| 379 | */ |
| 380 | static int tx_sched_init(struct sge *sge) |
| 381 | { |
| 382 | struct sched *s; |
| 383 | int i; |
| 384 | |
| 385 | s = kzalloc(sizeof (struct sched), GFP_KERNEL); |
| 386 | if (!s) |
| 387 | return -ENOMEM; |
| 388 | |
| 389 | pr_debug("tx_sched_init\n"); |
| 390 | tasklet_init(&s->sched_tsk, restart_sched, (unsigned long) sge); |
| 391 | sge->tx_sched = s; |
| 392 | |
| 393 | for (i = 0; i < MAX_NPORTS; i++) { |
| 394 | skb_queue_head_init(&s->p[i].skbq); |
| 395 | t1_sched_update_parms(sge, i, 1500, 1000); |
| 396 | } |
| 397 | |
| 398 | return 0; |
| 399 | } |
| 400 | |
| 401 | /* |
| 402 | * sched_update_avail() computes the delta since the last time it was called |
| 403 | * and updates the per port quota (number of bits that can be sent to the any |
| 404 | * port). |
| 405 | */ |
| 406 | static inline int sched_update_avail(struct sge *sge) |
| 407 | { |
| 408 | struct sched *s = sge->tx_sched; |
| 409 | ktime_t now = get_clock(); |
| 410 | unsigned int i; |
| 411 | long long delta_time_ns; |
| 412 | |
| 413 | delta_time_ns = ktime_to_ns(ktime_sub(now, s->last_updated)); |
| 414 | |
| 415 | pr_debug("sched_update_avail delta=%lld\n", delta_time_ns); |
| 416 | if (delta_time_ns < 15000) |
| 417 | return 0; |
| 418 | |
| 419 | for (i = 0; i < MAX_NPORTS; i++) { |
| 420 | struct sched_port *p = &s->p[i]; |
| 421 | unsigned int delta_avail; |
| 422 | |
| 423 | delta_avail = (p->drain_bits_per_1024ns * delta_time_ns) >> 13; |
| 424 | p->avail = min(p->avail + delta_avail, s->max_avail); |
| 425 | } |
| 426 | |
| 427 | s->last_updated = now; |
| 428 | |
| 429 | return 1; |
| 430 | } |
| 431 | |
| 432 | /* |
| 433 | * sched_skb() is called from two different places. In the tx path, any |
| 434 | * packet generating load on an output port will call sched_skb() |
| 435 | * (skb != NULL). In addition, sched_skb() is called from the irq/soft irq |
| 436 | * context (skb == NULL). |
| 437 | * The scheduler only returns a skb (which will then be sent) if the |
| 438 | * length of the skb is <= the current quota of the output port. |
| 439 | */ |
| 440 | static struct sk_buff *sched_skb(struct sge *sge, struct sk_buff *skb, |
| 441 | unsigned int credits) |
| 442 | { |
| 443 | struct sched *s = sge->tx_sched; |
| 444 | struct sk_buff_head *skbq; |
| 445 | unsigned int i, len, update = 1; |
| 446 | |
| 447 | pr_debug("sched_skb %p\n", skb); |
| 448 | if (!skb) { |
| 449 | if (!s->num) |
| 450 | return NULL; |
| 451 | } else { |
| 452 | skbq = &s->p[skb->dev->if_port].skbq; |
| 453 | __skb_queue_tail(skbq, skb); |
| 454 | s->num++; |
| 455 | skb = NULL; |
| 456 | } |
| 457 | |
| 458 | if (credits < MAX_SKB_FRAGS + 1) |
| 459 | goto out; |
| 460 | |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 461 | again: |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 462 | for (i = 0; i < MAX_NPORTS; i++) { |
David S. Miller | 18d777a | 2010-04-13 03:07:17 -0700 | [diff] [blame] | 463 | s->port = (s->port + 1) & (MAX_NPORTS - 1); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 464 | skbq = &s->p[s->port].skbq; |
| 465 | |
| 466 | skb = skb_peek(skbq); |
| 467 | |
| 468 | if (!skb) |
| 469 | continue; |
| 470 | |
| 471 | len = skb->len; |
| 472 | if (len <= s->p[s->port].avail) { |
| 473 | s->p[s->port].avail -= len; |
| 474 | s->num--; |
| 475 | __skb_unlink(skb, skbq); |
| 476 | goto out; |
| 477 | } |
| 478 | skb = NULL; |
| 479 | } |
| 480 | |
| 481 | if (update-- && sched_update_avail(sge)) |
| 482 | goto again; |
| 483 | |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 484 | out: |
| 485 | /* If there are more pending skbs, we use the hardware to schedule us |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 486 | * again. |
| 487 | */ |
| 488 | if (s->num && !skb) { |
| 489 | struct cmdQ *q = &sge->cmdQ[0]; |
| 490 | clear_bit(CMDQ_STAT_LAST_PKT_DB, &q->status); |
| 491 | if (test_and_set_bit(CMDQ_STAT_RUNNING, &q->status) == 0) { |
| 492 | set_bit(CMDQ_STAT_LAST_PKT_DB, &q->status); |
| 493 | writel(F_CMDQ0_ENABLE, sge->adapter->regs + A_SG_DOORBELL); |
| 494 | } |
| 495 | } |
| 496 | pr_debug("sched_skb ret %p\n", skb); |
| 497 | |
| 498 | return skb; |
| 499 | } |
| 500 | |
| 501 | /* |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 502 | * PIO to indicate that memory mapped Q contains valid descriptor(s). |
| 503 | */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 504 | static inline void doorbell_pio(struct adapter *adapter, u32 val) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 505 | { |
| 506 | wmb(); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 507 | writel(val, adapter->regs + A_SG_DOORBELL); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 508 | } |
| 509 | |
| 510 | /* |
| 511 | * Frees all RX buffers on the freelist Q. The caller must make sure that |
| 512 | * the SGE is turned off before calling this function. |
| 513 | */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 514 | static void free_freelQ_buffers(struct pci_dev *pdev, struct freelQ *q) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 515 | { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 516 | unsigned int cidx = q->cidx; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 517 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 518 | while (q->credits--) { |
| 519 | struct freelQ_ce *ce = &q->centries[cidx]; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 520 | |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 521 | pci_unmap_single(pdev, dma_unmap_addr(ce, dma_addr), |
| 522 | dma_unmap_len(ce, dma_len), |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 523 | PCI_DMA_FROMDEVICE); |
| 524 | dev_kfree_skb(ce->skb); |
| 525 | ce->skb = NULL; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 526 | if (++cidx == q->size) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 527 | cidx = 0; |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | /* |
| 532 | * Free RX free list and response queue resources. |
| 533 | */ |
| 534 | static void free_rx_resources(struct sge *sge) |
| 535 | { |
| 536 | struct pci_dev *pdev = sge->adapter->pdev; |
| 537 | unsigned int size, i; |
| 538 | |
| 539 | if (sge->respQ.entries) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 540 | size = sizeof(struct respQ_e) * sge->respQ.size; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 541 | pci_free_consistent(pdev, size, sge->respQ.entries, |
| 542 | sge->respQ.dma_addr); |
| 543 | } |
| 544 | |
| 545 | for (i = 0; i < SGE_FREELQ_N; i++) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 546 | struct freelQ *q = &sge->freelQ[i]; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 547 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 548 | if (q->centries) { |
| 549 | free_freelQ_buffers(pdev, q); |
| 550 | kfree(q->centries); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 551 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 552 | if (q->entries) { |
| 553 | size = sizeof(struct freelQ_e) * q->size; |
| 554 | pci_free_consistent(pdev, size, q->entries, |
| 555 | q->dma_addr); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 556 | } |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | /* |
| 561 | * Allocates basic RX resources, consisting of memory mapped freelist Qs and a |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 562 | * response queue. |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 563 | */ |
| 564 | static int alloc_rx_resources(struct sge *sge, struct sge_params *p) |
| 565 | { |
| 566 | struct pci_dev *pdev = sge->adapter->pdev; |
| 567 | unsigned int size, i; |
| 568 | |
| 569 | for (i = 0; i < SGE_FREELQ_N; i++) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 570 | struct freelQ *q = &sge->freelQ[i]; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 571 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 572 | q->genbit = 1; |
| 573 | q->size = p->freelQ_size[i]; |
| 574 | q->dma_offset = sge->rx_pkt_pad ? 0 : NET_IP_ALIGN; |
| 575 | size = sizeof(struct freelQ_e) * q->size; |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 576 | q->entries = pci_alloc_consistent(pdev, size, &q->dma_addr); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 577 | if (!q->entries) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 578 | goto err_no_mem; |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 579 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 580 | size = sizeof(struct freelQ_ce) * q->size; |
Stephen Hemminger | cbee9f9 | 2006-11-17 17:01:52 -0800 | [diff] [blame] | 581 | q->centries = kzalloc(size, GFP_KERNEL); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 582 | if (!q->centries) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 583 | goto err_no_mem; |
| 584 | } |
| 585 | |
| 586 | /* |
| 587 | * Calculate the buffer sizes for the two free lists. FL0 accommodates |
| 588 | * regular sized Ethernet frames, FL1 is sized not to exceed 16K, |
| 589 | * including all the sk_buff overhead. |
| 590 | * |
| 591 | * Note: For T2 FL0 and FL1 are reversed. |
| 592 | */ |
| 593 | sge->freelQ[!sge->jumbo_fl].rx_buffer_size = SGE_RX_SM_BUF_SIZE + |
| 594 | sizeof(struct cpl_rx_data) + |
| 595 | sge->freelQ[!sge->jumbo_fl].dma_offset; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 596 | |
| 597 | size = (16 * 1024) - |
| 598 | SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); |
| 599 | |
| 600 | sge->freelQ[sge->jumbo_fl].rx_buffer_size = size; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 601 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 602 | /* |
| 603 | * Setup which skb recycle Q should be used when recycling buffers from |
| 604 | * each free list. |
| 605 | */ |
| 606 | sge->freelQ[!sge->jumbo_fl].recycleq_idx = 0; |
| 607 | sge->freelQ[sge->jumbo_fl].recycleq_idx = 1; |
| 608 | |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 609 | sge->respQ.genbit = 1; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 610 | sge->respQ.size = SGE_RESPQ_E_N; |
| 611 | sge->respQ.credits = 0; |
| 612 | size = sizeof(struct respQ_e) * sge->respQ.size; |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 613 | sge->respQ.entries = |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 614 | pci_alloc_consistent(pdev, size, &sge->respQ.dma_addr); |
| 615 | if (!sge->respQ.entries) |
| 616 | goto err_no_mem; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 617 | return 0; |
| 618 | |
| 619 | err_no_mem: |
| 620 | free_rx_resources(sge); |
| 621 | return -ENOMEM; |
| 622 | } |
| 623 | |
| 624 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 625 | * Reclaims n TX descriptors and frees the buffers associated with them. |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 626 | */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 627 | static void free_cmdQ_buffers(struct sge *sge, struct cmdQ *q, unsigned int n) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 628 | { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 629 | struct cmdQ_ce *ce; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 630 | struct pci_dev *pdev = sge->adapter->pdev; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 631 | unsigned int cidx = q->cidx; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 632 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 633 | q->in_use -= n; |
| 634 | ce = &q->centries[cidx]; |
| 635 | while (n--) { |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 636 | if (likely(dma_unmap_len(ce, dma_len))) { |
| 637 | pci_unmap_single(pdev, dma_unmap_addr(ce, dma_addr), |
| 638 | dma_unmap_len(ce, dma_len), |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 639 | PCI_DMA_TODEVICE); |
| 640 | if (q->sop) |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 641 | q->sop = 0; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 642 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 643 | if (ce->skb) { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 644 | dev_kfree_skb_any(ce->skb); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 645 | q->sop = 1; |
| 646 | } |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 647 | ce++; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 648 | if (++cidx == q->size) { |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 649 | cidx = 0; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 650 | ce = q->centries; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 651 | } |
| 652 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 653 | q->cidx = cidx; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 654 | } |
| 655 | |
| 656 | /* |
| 657 | * Free TX resources. |
| 658 | * |
| 659 | * Assumes that SGE is stopped and all interrupts are disabled. |
| 660 | */ |
| 661 | static void free_tx_resources(struct sge *sge) |
| 662 | { |
| 663 | struct pci_dev *pdev = sge->adapter->pdev; |
| 664 | unsigned int size, i; |
| 665 | |
| 666 | for (i = 0; i < SGE_CMDQ_N; i++) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 667 | struct cmdQ *q = &sge->cmdQ[i]; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 668 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 669 | if (q->centries) { |
| 670 | if (q->in_use) |
| 671 | free_cmdQ_buffers(sge, q, q->in_use); |
| 672 | kfree(q->centries); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 673 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 674 | if (q->entries) { |
| 675 | size = sizeof(struct cmdQ_e) * q->size; |
| 676 | pci_free_consistent(pdev, size, q->entries, |
| 677 | q->dma_addr); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 678 | } |
| 679 | } |
| 680 | } |
| 681 | |
| 682 | /* |
| 683 | * Allocates basic TX resources, consisting of memory mapped command Qs. |
| 684 | */ |
| 685 | static int alloc_tx_resources(struct sge *sge, struct sge_params *p) |
| 686 | { |
| 687 | struct pci_dev *pdev = sge->adapter->pdev; |
| 688 | unsigned int size, i; |
| 689 | |
| 690 | for (i = 0; i < SGE_CMDQ_N; i++) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 691 | struct cmdQ *q = &sge->cmdQ[i]; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 692 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 693 | q->genbit = 1; |
| 694 | q->sop = 1; |
| 695 | q->size = p->cmdQ_size[i]; |
| 696 | q->in_use = 0; |
| 697 | q->status = 0; |
| 698 | q->processed = q->cleaned = 0; |
| 699 | q->stop_thres = 0; |
| 700 | spin_lock_init(&q->lock); |
| 701 | size = sizeof(struct cmdQ_e) * q->size; |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 702 | q->entries = pci_alloc_consistent(pdev, size, &q->dma_addr); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 703 | if (!q->entries) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 704 | goto err_no_mem; |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 705 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 706 | size = sizeof(struct cmdQ_ce) * q->size; |
Stephen Hemminger | cbee9f9 | 2006-11-17 17:01:52 -0800 | [diff] [blame] | 707 | q->centries = kzalloc(size, GFP_KERNEL); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 708 | if (!q->centries) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 709 | goto err_no_mem; |
| 710 | } |
| 711 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 712 | /* |
| 713 | * CommandQ 0 handles Ethernet and TOE packets, while queue 1 is TOE |
| 714 | * only. For queue 0 set the stop threshold so we can handle one more |
| 715 | * packet from each port, plus reserve an additional 24 entries for |
| 716 | * Ethernet packets only. Queue 1 never suspends nor do we reserve |
| 717 | * space for Ethernet packets. |
| 718 | */ |
| 719 | sge->cmdQ[0].stop_thres = sge->adapter->params.nports * |
| 720 | (MAX_SKB_FRAGS + 1); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 721 | return 0; |
| 722 | |
| 723 | err_no_mem: |
| 724 | free_tx_resources(sge); |
| 725 | return -ENOMEM; |
| 726 | } |
| 727 | |
| 728 | static inline void setup_ring_params(struct adapter *adapter, u64 addr, |
| 729 | u32 size, int base_reg_lo, |
| 730 | int base_reg_hi, int size_reg) |
| 731 | { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 732 | writel((u32)addr, adapter->regs + base_reg_lo); |
| 733 | writel(addr >> 32, adapter->regs + base_reg_hi); |
| 734 | writel(size, adapter->regs + size_reg); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 735 | } |
| 736 | |
| 737 | /* |
| 738 | * Enable/disable VLAN acceleration. |
| 739 | */ |
| 740 | void t1_set_vlan_accel(struct adapter *adapter, int on_off) |
| 741 | { |
| 742 | struct sge *sge = adapter->sge; |
| 743 | |
| 744 | sge->sge_control &= ~F_VLAN_XTRACT; |
| 745 | if (on_off) |
| 746 | sge->sge_control |= F_VLAN_XTRACT; |
| 747 | if (adapter->open_device_map) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 748 | writel(sge->sge_control, adapter->regs + A_SG_CONTROL); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 749 | readl(adapter->regs + A_SG_CONTROL); /* flush */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 750 | } |
| 751 | } |
| 752 | |
| 753 | /* |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 754 | * Programs the various SGE registers. However, the engine is not yet enabled, |
| 755 | * but sge->sge_control is setup and ready to go. |
| 756 | */ |
| 757 | static void configure_sge(struct sge *sge, struct sge_params *p) |
| 758 | { |
| 759 | struct adapter *ap = sge->adapter; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 760 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 761 | writel(0, ap->regs + A_SG_CONTROL); |
| 762 | setup_ring_params(ap, sge->cmdQ[0].dma_addr, sge->cmdQ[0].size, |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 763 | A_SG_CMD0BASELWR, A_SG_CMD0BASEUPR, A_SG_CMD0SIZE); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 764 | setup_ring_params(ap, sge->cmdQ[1].dma_addr, sge->cmdQ[1].size, |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 765 | A_SG_CMD1BASELWR, A_SG_CMD1BASEUPR, A_SG_CMD1SIZE); |
| 766 | setup_ring_params(ap, sge->freelQ[0].dma_addr, |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 767 | sge->freelQ[0].size, A_SG_FL0BASELWR, |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 768 | A_SG_FL0BASEUPR, A_SG_FL0SIZE); |
| 769 | setup_ring_params(ap, sge->freelQ[1].dma_addr, |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 770 | sge->freelQ[1].size, A_SG_FL1BASELWR, |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 771 | A_SG_FL1BASEUPR, A_SG_FL1SIZE); |
| 772 | |
| 773 | /* The threshold comparison uses <. */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 774 | writel(SGE_RX_SM_BUF_SIZE + 1, ap->regs + A_SG_FLTHRESHOLD); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 775 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 776 | setup_ring_params(ap, sge->respQ.dma_addr, sge->respQ.size, |
| 777 | A_SG_RSPBASELWR, A_SG_RSPBASEUPR, A_SG_RSPSIZE); |
| 778 | writel((u32)sge->respQ.size - 1, ap->regs + A_SG_RSPQUEUECREDIT); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 779 | |
| 780 | sge->sge_control = F_CMDQ0_ENABLE | F_CMDQ1_ENABLE | F_FL0_ENABLE | |
| 781 | F_FL1_ENABLE | F_CPL_ENABLE | F_RESPONSE_QUEUE_ENABLE | |
| 782 | V_CMDQ_PRIORITY(2) | F_DISABLE_CMDQ1_GTS | F_ISCSI_COALESCE | |
| 783 | V_RX_PKT_OFFSET(sge->rx_pkt_pad); |
| 784 | |
| 785 | #if defined(__BIG_ENDIAN_BITFIELD) |
| 786 | sge->sge_control |= F_ENABLE_BIG_ENDIAN; |
| 787 | #endif |
| 788 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 789 | /* Initialize no-resource timer */ |
| 790 | sge->intrtimer_nres = SGE_INTRTIMER_NRES * core_ticks_per_usec(ap); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 791 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 792 | t1_sge_set_coalesce_params(sge, p); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 793 | } |
| 794 | |
| 795 | /* |
| 796 | * Return the payload capacity of the jumbo free-list buffers. |
| 797 | */ |
| 798 | static inline unsigned int jumbo_payload_capacity(const struct sge *sge) |
| 799 | { |
| 800 | return sge->freelQ[sge->jumbo_fl].rx_buffer_size - |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 801 | sge->freelQ[sge->jumbo_fl].dma_offset - |
| 802 | sizeof(struct cpl_rx_data); |
| 803 | } |
| 804 | |
| 805 | /* |
| 806 | * Frees all SGE related resources and the sge structure itself |
| 807 | */ |
| 808 | void t1_sge_destroy(struct sge *sge) |
| 809 | { |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 810 | int i; |
| 811 | |
| 812 | for_each_port(sge->adapter, i) |
| 813 | free_percpu(sge->port_stats[i]); |
| 814 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 815 | kfree(sge->tx_sched); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 816 | free_tx_resources(sge); |
| 817 | free_rx_resources(sge); |
| 818 | kfree(sge); |
| 819 | } |
| 820 | |
| 821 | /* |
| 822 | * Allocates new RX buffers on the freelist Q (and tracks them on the freelist |
| 823 | * context Q) until the Q is full or alloc_skb fails. |
| 824 | * |
| 825 | * It is possible that the generation bits already match, indicating that the |
| 826 | * buffer is already valid and nothing needs to be done. This happens when we |
| 827 | * copied a received buffer into a new sk_buff during the interrupt processing. |
| 828 | * |
| 829 | * If the SGE doesn't automatically align packets properly (!sge->rx_pkt_pad), |
| 830 | * we specify a RX_OFFSET in order to make sure that the IP header is 4B |
| 831 | * aligned. |
| 832 | */ |
| 833 | static void refill_free_list(struct sge *sge, struct freelQ *q) |
| 834 | { |
| 835 | struct pci_dev *pdev = sge->adapter->pdev; |
| 836 | struct freelQ_ce *ce = &q->centries[q->pidx]; |
| 837 | struct freelQ_e *e = &q->entries[q->pidx]; |
| 838 | unsigned int dma_len = q->rx_buffer_size - q->dma_offset; |
| 839 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 840 | while (q->credits < q->size) { |
| 841 | struct sk_buff *skb; |
| 842 | dma_addr_t mapping; |
| 843 | |
| 844 | skb = alloc_skb(q->rx_buffer_size, GFP_ATOMIC); |
| 845 | if (!skb) |
| 846 | break; |
| 847 | |
| 848 | skb_reserve(skb, q->dma_offset); |
| 849 | mapping = pci_map_single(pdev, skb->data, dma_len, |
| 850 | PCI_DMA_FROMDEVICE); |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 851 | skb_reserve(skb, sge->rx_pkt_pad); |
| 852 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 853 | ce->skb = skb; |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 854 | dma_unmap_addr_set(ce, dma_addr, mapping); |
| 855 | dma_unmap_len_set(ce, dma_len, dma_len); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 856 | e->addr_lo = (u32)mapping; |
| 857 | e->addr_hi = (u64)mapping >> 32; |
| 858 | e->len_gen = V_CMD_LEN(dma_len) | V_CMD_GEN1(q->genbit); |
| 859 | wmb(); |
| 860 | e->gen2 = V_CMD_GEN2(q->genbit); |
| 861 | |
| 862 | e++; |
| 863 | ce++; |
| 864 | if (++q->pidx == q->size) { |
| 865 | q->pidx = 0; |
| 866 | q->genbit ^= 1; |
| 867 | ce = q->centries; |
| 868 | e = q->entries; |
| 869 | } |
| 870 | q->credits++; |
| 871 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 872 | } |
| 873 | |
| 874 | /* |
| 875 | * Calls refill_free_list for both free lists. If we cannot fill at least 1/4 |
| 876 | * of both rings, we go into 'few interrupt mode' in order to give the system |
| 877 | * time to free up resources. |
| 878 | */ |
| 879 | static void freelQs_empty(struct sge *sge) |
| 880 | { |
| 881 | struct adapter *adapter = sge->adapter; |
| 882 | u32 irq_reg = readl(adapter->regs + A_SG_INT_ENABLE); |
| 883 | u32 irqholdoff_reg; |
| 884 | |
| 885 | refill_free_list(sge, &sge->freelQ[0]); |
| 886 | refill_free_list(sge, &sge->freelQ[1]); |
| 887 | |
| 888 | if (sge->freelQ[0].credits > (sge->freelQ[0].size >> 2) && |
| 889 | sge->freelQ[1].credits > (sge->freelQ[1].size >> 2)) { |
| 890 | irq_reg |= F_FL_EXHAUSTED; |
| 891 | irqholdoff_reg = sge->fixed_intrtimer; |
| 892 | } else { |
| 893 | /* Clear the F_FL_EXHAUSTED interrupts for now */ |
| 894 | irq_reg &= ~F_FL_EXHAUSTED; |
| 895 | irqholdoff_reg = sge->intrtimer_nres; |
| 896 | } |
| 897 | writel(irqholdoff_reg, adapter->regs + A_SG_INTRTIMER); |
| 898 | writel(irq_reg, adapter->regs + A_SG_INT_ENABLE); |
| 899 | |
| 900 | /* We reenable the Qs to force a freelist GTS interrupt later */ |
| 901 | doorbell_pio(adapter, F_FL0_ENABLE | F_FL1_ENABLE); |
| 902 | } |
| 903 | |
| 904 | #define SGE_PL_INTR_MASK (F_PL_INTR_SGE_ERR | F_PL_INTR_SGE_DATA) |
| 905 | #define SGE_INT_FATAL (F_RESPQ_OVERFLOW | F_PACKET_TOO_BIG | F_PACKET_MISMATCH) |
| 906 | #define SGE_INT_ENABLE (F_RESPQ_EXHAUSTED | F_RESPQ_OVERFLOW | \ |
| 907 | F_FL_EXHAUSTED | F_PACKET_TOO_BIG | F_PACKET_MISMATCH) |
| 908 | |
| 909 | /* |
| 910 | * Disable SGE Interrupts |
| 911 | */ |
| 912 | void t1_sge_intr_disable(struct sge *sge) |
| 913 | { |
| 914 | u32 val = readl(sge->adapter->regs + A_PL_ENABLE); |
| 915 | |
| 916 | writel(val & ~SGE_PL_INTR_MASK, sge->adapter->regs + A_PL_ENABLE); |
| 917 | writel(0, sge->adapter->regs + A_SG_INT_ENABLE); |
| 918 | } |
| 919 | |
| 920 | /* |
| 921 | * Enable SGE interrupts. |
| 922 | */ |
| 923 | void t1_sge_intr_enable(struct sge *sge) |
| 924 | { |
| 925 | u32 en = SGE_INT_ENABLE; |
| 926 | u32 val = readl(sge->adapter->regs + A_PL_ENABLE); |
| 927 | |
| 928 | if (sge->adapter->flags & TSO_CAPABLE) |
| 929 | en &= ~F_PACKET_TOO_BIG; |
| 930 | writel(en, sge->adapter->regs + A_SG_INT_ENABLE); |
| 931 | writel(val | SGE_PL_INTR_MASK, sge->adapter->regs + A_PL_ENABLE); |
| 932 | } |
| 933 | |
| 934 | /* |
| 935 | * Clear SGE interrupts. |
| 936 | */ |
| 937 | void t1_sge_intr_clear(struct sge *sge) |
| 938 | { |
| 939 | writel(SGE_PL_INTR_MASK, sge->adapter->regs + A_PL_CAUSE); |
| 940 | writel(0xffffffff, sge->adapter->regs + A_SG_INT_CAUSE); |
| 941 | } |
| 942 | |
| 943 | /* |
| 944 | * SGE 'Error' interrupt handler |
| 945 | */ |
| 946 | int t1_sge_intr_error_handler(struct sge *sge) |
| 947 | { |
| 948 | struct adapter *adapter = sge->adapter; |
| 949 | u32 cause = readl(adapter->regs + A_SG_INT_CAUSE); |
| 950 | |
| 951 | if (adapter->flags & TSO_CAPABLE) |
| 952 | cause &= ~F_PACKET_TOO_BIG; |
| 953 | if (cause & F_RESPQ_EXHAUSTED) |
| 954 | sge->stats.respQ_empty++; |
| 955 | if (cause & F_RESPQ_OVERFLOW) { |
| 956 | sge->stats.respQ_overflow++; |
Joe Perches | c1f5121 | 2010-02-22 16:56:57 +0000 | [diff] [blame] | 957 | pr_alert("%s: SGE response queue overflow\n", |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 958 | adapter->name); |
| 959 | } |
| 960 | if (cause & F_FL_EXHAUSTED) { |
| 961 | sge->stats.freelistQ_empty++; |
| 962 | freelQs_empty(sge); |
| 963 | } |
| 964 | if (cause & F_PACKET_TOO_BIG) { |
| 965 | sge->stats.pkt_too_big++; |
Joe Perches | c1f5121 | 2010-02-22 16:56:57 +0000 | [diff] [blame] | 966 | pr_alert("%s: SGE max packet size exceeded\n", |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 967 | adapter->name); |
| 968 | } |
| 969 | if (cause & F_PACKET_MISMATCH) { |
| 970 | sge->stats.pkt_mismatch++; |
Joe Perches | c1f5121 | 2010-02-22 16:56:57 +0000 | [diff] [blame] | 971 | pr_alert("%s: SGE packet mismatch\n", adapter->name); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 972 | } |
| 973 | if (cause & SGE_INT_FATAL) |
| 974 | t1_fatal_err(adapter); |
| 975 | |
| 976 | writel(cause, adapter->regs + A_SG_INT_CAUSE); |
| 977 | return 0; |
| 978 | } |
| 979 | |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 980 | const struct sge_intr_counts *t1_sge_get_intr_counts(const struct sge *sge) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 981 | { |
| 982 | return &sge->stats; |
| 983 | } |
| 984 | |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 985 | void t1_sge_get_port_stats(const struct sge *sge, int port, |
| 986 | struct sge_port_stats *ss) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 987 | { |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 988 | int cpu; |
| 989 | |
| 990 | memset(ss, 0, sizeof(*ss)); |
| 991 | for_each_possible_cpu(cpu) { |
| 992 | struct sge_port_stats *st = per_cpu_ptr(sge->port_stats[port], cpu); |
| 993 | |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 994 | ss->rx_cso_good += st->rx_cso_good; |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 995 | ss->tx_cso += st->tx_cso; |
| 996 | ss->tx_tso += st->tx_tso; |
Divy Le Ray | 7832ee0 | 2007-11-27 13:30:09 -0800 | [diff] [blame] | 997 | ss->tx_need_hdrroom += st->tx_need_hdrroom; |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 998 | ss->vlan_xtract += st->vlan_xtract; |
| 999 | ss->vlan_insert += st->vlan_insert; |
| 1000 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1001 | } |
| 1002 | |
| 1003 | /** |
| 1004 | * recycle_fl_buf - recycle a free list buffer |
| 1005 | * @fl: the free list |
| 1006 | * @idx: index of buffer to recycle |
| 1007 | * |
| 1008 | * Recycles the specified buffer on the given free list by adding it at |
| 1009 | * the next available slot on the list. |
| 1010 | */ |
| 1011 | static void recycle_fl_buf(struct freelQ *fl, int idx) |
| 1012 | { |
| 1013 | struct freelQ_e *from = &fl->entries[idx]; |
| 1014 | struct freelQ_e *to = &fl->entries[fl->pidx]; |
| 1015 | |
| 1016 | fl->centries[fl->pidx] = fl->centries[idx]; |
| 1017 | to->addr_lo = from->addr_lo; |
| 1018 | to->addr_hi = from->addr_hi; |
| 1019 | to->len_gen = G_CMD_LEN(from->len_gen) | V_CMD_GEN1(fl->genbit); |
| 1020 | wmb(); |
| 1021 | to->gen2 = V_CMD_GEN2(fl->genbit); |
| 1022 | fl->credits++; |
| 1023 | |
| 1024 | if (++fl->pidx == fl->size) { |
| 1025 | fl->pidx = 0; |
| 1026 | fl->genbit ^= 1; |
| 1027 | } |
| 1028 | } |
| 1029 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1030 | static int copybreak __read_mostly = 256; |
| 1031 | module_param(copybreak, int, 0); |
| 1032 | MODULE_PARM_DESC(copybreak, "Receive copy threshold"); |
| 1033 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1034 | /** |
| 1035 | * get_packet - return the next ingress packet buffer |
| 1036 | * @pdev: the PCI device that received the packet |
| 1037 | * @fl: the SGE free list holding the packet |
| 1038 | * @len: the actual packet length, excluding any SGE padding |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1039 | * |
| 1040 | * Get the next packet from a free list and complete setup of the |
| 1041 | * sk_buff. If the packet is small we make a copy and recycle the |
| 1042 | * original buffer, otherwise we use the original buffer itself. If a |
| 1043 | * positive drop threshold is supplied packets are dropped and their |
| 1044 | * buffers recycled if (a) the number of remaining buffers is under the |
| 1045 | * threshold and the packet is too big to copy, or (b) the packet should |
| 1046 | * be copied but there is no memory for the copy. |
| 1047 | */ |
| 1048 | static inline struct sk_buff *get_packet(struct pci_dev *pdev, |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1049 | struct freelQ *fl, unsigned int len) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1050 | { |
| 1051 | struct sk_buff *skb; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1052 | const struct freelQ_ce *ce = &fl->centries[fl->cidx]; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1053 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1054 | if (len < copybreak) { |
| 1055 | skb = alloc_skb(len + 2, GFP_ATOMIC); |
| 1056 | if (!skb) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1057 | goto use_orig_buf; |
| 1058 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1059 | skb_reserve(skb, 2); /* align IP header */ |
| 1060 | skb_put(skb, len); |
| 1061 | pci_dma_sync_single_for_cpu(pdev, |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1062 | dma_unmap_addr(ce, dma_addr), |
| 1063 | dma_unmap_len(ce, dma_len), |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1064 | PCI_DMA_FROMDEVICE); |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 1065 | skb_copy_from_linear_data(ce->skb, skb->data, len); |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1066 | pci_dma_sync_single_for_device(pdev, |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1067 | dma_unmap_addr(ce, dma_addr), |
| 1068 | dma_unmap_len(ce, dma_len), |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1069 | PCI_DMA_FROMDEVICE); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1070 | recycle_fl_buf(fl, fl->cidx); |
| 1071 | return skb; |
| 1072 | } |
| 1073 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1074 | use_orig_buf: |
| 1075 | if (fl->credits < 2) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1076 | recycle_fl_buf(fl, fl->cidx); |
| 1077 | return NULL; |
| 1078 | } |
| 1079 | |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1080 | pci_unmap_single(pdev, dma_unmap_addr(ce, dma_addr), |
| 1081 | dma_unmap_len(ce, dma_len), PCI_DMA_FROMDEVICE); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1082 | skb = ce->skb; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1083 | prefetch(skb->data); |
| 1084 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1085 | skb_put(skb, len); |
| 1086 | return skb; |
| 1087 | } |
| 1088 | |
| 1089 | /** |
| 1090 | * unexpected_offload - handle an unexpected offload packet |
| 1091 | * @adapter: the adapter |
| 1092 | * @fl: the free list that received the packet |
| 1093 | * |
| 1094 | * Called when we receive an unexpected offload packet (e.g., the TOE |
| 1095 | * function is disabled or the card is a NIC). Prints a message and |
| 1096 | * recycles the buffer. |
| 1097 | */ |
| 1098 | static void unexpected_offload(struct adapter *adapter, struct freelQ *fl) |
| 1099 | { |
| 1100 | struct freelQ_ce *ce = &fl->centries[fl->cidx]; |
| 1101 | struct sk_buff *skb = ce->skb; |
| 1102 | |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1103 | pci_dma_sync_single_for_cpu(adapter->pdev, dma_unmap_addr(ce, dma_addr), |
| 1104 | dma_unmap_len(ce, dma_len), PCI_DMA_FROMDEVICE); |
Joe Perches | c1f5121 | 2010-02-22 16:56:57 +0000 | [diff] [blame] | 1105 | pr_err("%s: unexpected offload packet, cmd %u\n", |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1106 | adapter->name, *skb->data); |
| 1107 | recycle_fl_buf(fl, fl->cidx); |
| 1108 | } |
| 1109 | |
| 1110 | /* |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1111 | * T1/T2 SGE limits the maximum DMA size per TX descriptor to |
| 1112 | * SGE_TX_DESC_MAX_PLEN (16KB). If the PAGE_SIZE is larger than 16KB, the |
| 1113 | * stack might send more than SGE_TX_DESC_MAX_PLEN in a contiguous manner. |
| 1114 | * Note that the *_large_page_tx_descs stuff will be optimized out when |
| 1115 | * PAGE_SIZE <= SGE_TX_DESC_MAX_PLEN. |
| 1116 | * |
| 1117 | * compute_large_page_descs() computes how many additional descriptors are |
| 1118 | * required to break down the stack's request. |
| 1119 | */ |
| 1120 | static inline unsigned int compute_large_page_tx_descs(struct sk_buff *skb) |
| 1121 | { |
| 1122 | unsigned int count = 0; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1123 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1124 | if (PAGE_SIZE > SGE_TX_DESC_MAX_PLEN) { |
| 1125 | unsigned int nfrags = skb_shinfo(skb)->nr_frags; |
Eric Dumazet | e743d31 | 2010-04-14 15:59:40 -0700 | [diff] [blame] | 1126 | unsigned int i, len = skb_headlen(skb); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1127 | while (len > SGE_TX_DESC_MAX_PLEN) { |
| 1128 | count++; |
| 1129 | len -= SGE_TX_DESC_MAX_PLEN; |
| 1130 | } |
| 1131 | for (i = 0; nfrags--; i++) { |
| 1132 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| 1133 | len = frag->size; |
| 1134 | while (len > SGE_TX_DESC_MAX_PLEN) { |
| 1135 | count++; |
| 1136 | len -= SGE_TX_DESC_MAX_PLEN; |
| 1137 | } |
| 1138 | } |
| 1139 | } |
| 1140 | return count; |
| 1141 | } |
| 1142 | |
| 1143 | /* |
| 1144 | * Write a cmdQ entry. |
| 1145 | * |
| 1146 | * Since this function writes the 'flags' field, it must not be used to |
| 1147 | * write the first cmdQ entry. |
| 1148 | */ |
| 1149 | static inline void write_tx_desc(struct cmdQ_e *e, dma_addr_t mapping, |
| 1150 | unsigned int len, unsigned int gen, |
| 1151 | unsigned int eop) |
| 1152 | { |
Alexander Beregalov | 0ee904c | 2009-04-11 14:50:23 +0000 | [diff] [blame] | 1153 | BUG_ON(len > SGE_TX_DESC_MAX_PLEN); |
| 1154 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1155 | e->addr_lo = (u32)mapping; |
| 1156 | e->addr_hi = (u64)mapping >> 32; |
| 1157 | e->len_gen = V_CMD_LEN(len) | V_CMD_GEN1(gen); |
| 1158 | e->flags = F_CMD_DATAVALID | V_CMD_EOP(eop) | V_CMD_GEN2(gen); |
| 1159 | } |
| 1160 | |
| 1161 | /* |
| 1162 | * See comment for previous function. |
| 1163 | * |
| 1164 | * write_tx_descs_large_page() writes additional SGE tx descriptors if |
| 1165 | * *desc_len exceeds HW's capability. |
| 1166 | */ |
| 1167 | static inline unsigned int write_large_page_tx_descs(unsigned int pidx, |
| 1168 | struct cmdQ_e **e, |
| 1169 | struct cmdQ_ce **ce, |
| 1170 | unsigned int *gen, |
| 1171 | dma_addr_t *desc_mapping, |
| 1172 | unsigned int *desc_len, |
| 1173 | unsigned int nfrags, |
| 1174 | struct cmdQ *q) |
| 1175 | { |
| 1176 | if (PAGE_SIZE > SGE_TX_DESC_MAX_PLEN) { |
| 1177 | struct cmdQ_e *e1 = *e; |
| 1178 | struct cmdQ_ce *ce1 = *ce; |
| 1179 | |
| 1180 | while (*desc_len > SGE_TX_DESC_MAX_PLEN) { |
| 1181 | *desc_len -= SGE_TX_DESC_MAX_PLEN; |
| 1182 | write_tx_desc(e1, *desc_mapping, SGE_TX_DESC_MAX_PLEN, |
| 1183 | *gen, nfrags == 0 && *desc_len == 0); |
| 1184 | ce1->skb = NULL; |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1185 | dma_unmap_len_set(ce1, dma_len, 0); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1186 | *desc_mapping += SGE_TX_DESC_MAX_PLEN; |
| 1187 | if (*desc_len) { |
| 1188 | ce1++; |
| 1189 | e1++; |
| 1190 | if (++pidx == q->size) { |
| 1191 | pidx = 0; |
| 1192 | *gen ^= 1; |
| 1193 | ce1 = q->centries; |
| 1194 | e1 = q->entries; |
| 1195 | } |
| 1196 | } |
| 1197 | } |
| 1198 | *e = e1; |
| 1199 | *ce = ce1; |
| 1200 | } |
| 1201 | return pidx; |
| 1202 | } |
| 1203 | |
| 1204 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1205 | * Write the command descriptors to transmit the given skb starting at |
| 1206 | * descriptor pidx with the given generation. |
| 1207 | */ |
| 1208 | static inline void write_tx_descs(struct adapter *adapter, struct sk_buff *skb, |
| 1209 | unsigned int pidx, unsigned int gen, |
| 1210 | struct cmdQ *q) |
| 1211 | { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1212 | dma_addr_t mapping, desc_mapping; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1213 | struct cmdQ_e *e, *e1; |
| 1214 | struct cmdQ_ce *ce; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1215 | unsigned int i, flags, first_desc_len, desc_len, |
| 1216 | nfrags = skb_shinfo(skb)->nr_frags; |
| 1217 | |
| 1218 | e = e1 = &q->entries[pidx]; |
| 1219 | ce = &q->centries[pidx]; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1220 | |
| 1221 | mapping = pci_map_single(adapter->pdev, skb->data, |
Eric Dumazet | e743d31 | 2010-04-14 15:59:40 -0700 | [diff] [blame] | 1222 | skb_headlen(skb), PCI_DMA_TODEVICE); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1223 | |
| 1224 | desc_mapping = mapping; |
Eric Dumazet | e743d31 | 2010-04-14 15:59:40 -0700 | [diff] [blame] | 1225 | desc_len = skb_headlen(skb); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1226 | |
| 1227 | flags = F_CMD_DATAVALID | F_CMD_SOP | |
| 1228 | V_CMD_EOP(nfrags == 0 && desc_len <= SGE_TX_DESC_MAX_PLEN) | |
| 1229 | V_CMD_GEN2(gen); |
| 1230 | first_desc_len = (desc_len <= SGE_TX_DESC_MAX_PLEN) ? |
| 1231 | desc_len : SGE_TX_DESC_MAX_PLEN; |
| 1232 | e->addr_lo = (u32)desc_mapping; |
| 1233 | e->addr_hi = (u64)desc_mapping >> 32; |
| 1234 | e->len_gen = V_CMD_LEN(first_desc_len) | V_CMD_GEN1(gen); |
| 1235 | ce->skb = NULL; |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1236 | dma_unmap_len_set(ce, dma_len, 0); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1237 | |
| 1238 | if (PAGE_SIZE > SGE_TX_DESC_MAX_PLEN && |
| 1239 | desc_len > SGE_TX_DESC_MAX_PLEN) { |
| 1240 | desc_mapping += first_desc_len; |
| 1241 | desc_len -= first_desc_len; |
| 1242 | e1++; |
| 1243 | ce++; |
| 1244 | if (++pidx == q->size) { |
| 1245 | pidx = 0; |
| 1246 | gen ^= 1; |
| 1247 | e1 = q->entries; |
| 1248 | ce = q->centries; |
| 1249 | } |
| 1250 | pidx = write_large_page_tx_descs(pidx, &e1, &ce, &gen, |
| 1251 | &desc_mapping, &desc_len, |
| 1252 | nfrags, q); |
| 1253 | |
| 1254 | if (likely(desc_len)) |
| 1255 | write_tx_desc(e1, desc_mapping, desc_len, gen, |
| 1256 | nfrags == 0); |
| 1257 | } |
| 1258 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1259 | ce->skb = NULL; |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1260 | dma_unmap_addr_set(ce, dma_addr, mapping); |
Eric Dumazet | e743d31 | 2010-04-14 15:59:40 -0700 | [diff] [blame] | 1261 | dma_unmap_len_set(ce, dma_len, skb_headlen(skb)); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1262 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1263 | for (i = 0; nfrags--; i++) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1264 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1265 | e1++; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1266 | ce++; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1267 | if (++pidx == q->size) { |
| 1268 | pidx = 0; |
| 1269 | gen ^= 1; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1270 | e1 = q->entries; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1271 | ce = q->centries; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1272 | } |
| 1273 | |
| 1274 | mapping = pci_map_page(adapter->pdev, frag->page, |
| 1275 | frag->page_offset, frag->size, |
| 1276 | PCI_DMA_TODEVICE); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1277 | desc_mapping = mapping; |
| 1278 | desc_len = frag->size; |
| 1279 | |
| 1280 | pidx = write_large_page_tx_descs(pidx, &e1, &ce, &gen, |
| 1281 | &desc_mapping, &desc_len, |
| 1282 | nfrags, q); |
| 1283 | if (likely(desc_len)) |
| 1284 | write_tx_desc(e1, desc_mapping, desc_len, gen, |
| 1285 | nfrags == 0); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1286 | ce->skb = NULL; |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1287 | dma_unmap_addr_set(ce, dma_addr, mapping); |
| 1288 | dma_unmap_len_set(ce, dma_len, frag->size); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1289 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1290 | ce->skb = skb; |
| 1291 | wmb(); |
| 1292 | e->flags = flags; |
| 1293 | } |
| 1294 | |
| 1295 | /* |
| 1296 | * Clean up completed Tx buffers. |
| 1297 | */ |
| 1298 | static inline void reclaim_completed_tx(struct sge *sge, struct cmdQ *q) |
| 1299 | { |
| 1300 | unsigned int reclaim = q->processed - q->cleaned; |
| 1301 | |
| 1302 | if (reclaim) { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1303 | pr_debug("reclaim_completed_tx processed:%d cleaned:%d\n", |
| 1304 | q->processed, q->cleaned); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1305 | free_cmdQ_buffers(sge, q, reclaim); |
| 1306 | q->cleaned += reclaim; |
| 1307 | } |
| 1308 | } |
| 1309 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1310 | /* |
| 1311 | * Called from tasklet. Checks the scheduler for any |
| 1312 | * pending skbs that can be sent. |
| 1313 | */ |
| 1314 | static void restart_sched(unsigned long arg) |
| 1315 | { |
| 1316 | struct sge *sge = (struct sge *) arg; |
| 1317 | struct adapter *adapter = sge->adapter; |
| 1318 | struct cmdQ *q = &sge->cmdQ[0]; |
| 1319 | struct sk_buff *skb; |
| 1320 | unsigned int credits, queued_skb = 0; |
| 1321 | |
| 1322 | spin_lock(&q->lock); |
| 1323 | reclaim_completed_tx(sge, q); |
| 1324 | |
| 1325 | credits = q->size - q->in_use; |
| 1326 | pr_debug("restart_sched credits=%d\n", credits); |
| 1327 | while ((skb = sched_skb(sge, NULL, credits)) != NULL) { |
| 1328 | unsigned int genbit, pidx, count; |
| 1329 | count = 1 + skb_shinfo(skb)->nr_frags; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1330 | count += compute_large_page_tx_descs(skb); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1331 | q->in_use += count; |
| 1332 | genbit = q->genbit; |
| 1333 | pidx = q->pidx; |
| 1334 | q->pidx += count; |
| 1335 | if (q->pidx >= q->size) { |
| 1336 | q->pidx -= q->size; |
| 1337 | q->genbit ^= 1; |
| 1338 | } |
| 1339 | write_tx_descs(adapter, skb, pidx, genbit, q); |
| 1340 | credits = q->size - q->in_use; |
| 1341 | queued_skb = 1; |
| 1342 | } |
| 1343 | |
| 1344 | if (queued_skb) { |
| 1345 | clear_bit(CMDQ_STAT_LAST_PKT_DB, &q->status); |
| 1346 | if (test_and_set_bit(CMDQ_STAT_RUNNING, &q->status) == 0) { |
| 1347 | set_bit(CMDQ_STAT_LAST_PKT_DB, &q->status); |
| 1348 | writel(F_CMDQ0_ENABLE, adapter->regs + A_SG_DOORBELL); |
| 1349 | } |
| 1350 | } |
| 1351 | spin_unlock(&q->lock); |
| 1352 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1353 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1354 | /** |
| 1355 | * sge_rx - process an ingress ethernet packet |
| 1356 | * @sge: the sge structure |
| 1357 | * @fl: the free list that contains the packet buffer |
| 1358 | * @len: the packet length |
| 1359 | * |
| 1360 | * Process an ingress ethernet pakcet and deliver it to the stack. |
| 1361 | */ |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1362 | static void sge_rx(struct sge *sge, struct freelQ *fl, unsigned int len) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1363 | { |
| 1364 | struct sk_buff *skb; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1365 | const struct cpl_rx_pkt *p; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1366 | struct adapter *adapter = sge->adapter; |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1367 | struct sge_port_stats *st; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1368 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1369 | skb = get_packet(adapter->pdev, fl, len - sge->rx_pkt_pad); |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1370 | if (unlikely(!skb)) { |
| 1371 | sge->stats.rx_drops++; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1372 | return; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1373 | } |
| 1374 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1375 | p = (const struct cpl_rx_pkt *) skb->data; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1376 | if (p->iff >= adapter->params.nports) { |
| 1377 | kfree_skb(skb); |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1378 | return; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1379 | } |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1380 | __skb_pull(skb, sizeof(*p)); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1381 | |
Christoph Lameter | ca0c958 | 2009-10-03 19:48:22 +0900 | [diff] [blame] | 1382 | st = this_cpu_ptr(sge->port_stats[p->iff]); |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1383 | |
Arnaldo Carvalho de Melo | 4c13eb6 | 2007-04-25 17:40:23 -0700 | [diff] [blame] | 1384 | skb->protocol = eth_type_trans(skb, adapter->port[p->iff].dev); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1385 | if ((adapter->flags & RX_CSUM_ENABLED) && p->csum == 0xffff && |
| 1386 | skb->protocol == htons(ETH_P_IP) && |
| 1387 | (skb->data[9] == IPPROTO_TCP || skb->data[9] == IPPROTO_UDP)) { |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1388 | ++st->rx_cso_good; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1389 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 1390 | } else |
Eric Dumazet | bc8acf2 | 2010-09-02 13:07:41 -0700 | [diff] [blame^] | 1391 | skb_checksum_none_assert(skb); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1392 | |
| 1393 | if (unlikely(adapter->vlan_grp && p->vlan_valid)) { |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1394 | st->vlan_xtract++; |
Francois Romieu | 4422b00 | 2008-07-11 00:29:19 +0200 | [diff] [blame] | 1395 | vlan_hwaccel_receive_skb(skb, adapter->vlan_grp, |
| 1396 | ntohs(p->vlan)); |
| 1397 | } else |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1398 | netif_receive_skb(skb); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1399 | } |
| 1400 | |
| 1401 | /* |
| 1402 | * Returns true if a command queue has enough available descriptors that |
| 1403 | * we can resume Tx operation after temporarily disabling its packet queue. |
| 1404 | */ |
| 1405 | static inline int enough_free_Tx_descs(const struct cmdQ *q) |
| 1406 | { |
| 1407 | unsigned int r = q->processed - q->cleaned; |
| 1408 | |
| 1409 | return q->in_use - r < (q->size >> 1); |
| 1410 | } |
| 1411 | |
| 1412 | /* |
| 1413 | * Called when sufficient space has become available in the SGE command queues |
| 1414 | * after the Tx packet schedulers have been suspended to restart the Tx path. |
| 1415 | */ |
| 1416 | static void restart_tx_queues(struct sge *sge) |
| 1417 | { |
| 1418 | struct adapter *adap = sge->adapter; |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 1419 | int i; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1420 | |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 1421 | if (!enough_free_Tx_descs(&sge->cmdQ[0])) |
| 1422 | return; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1423 | |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 1424 | for_each_port(adap, i) { |
| 1425 | struct net_device *nd = adap->port[i].dev; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1426 | |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 1427 | if (test_and_clear_bit(nd->if_port, &sge->stopped_tx_queues) && |
| 1428 | netif_running(nd)) { |
| 1429 | sge->stats.cmdQ_restarted[2]++; |
| 1430 | netif_wake_queue(nd); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1431 | } |
| 1432 | } |
| 1433 | } |
| 1434 | |
| 1435 | /* |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1436 | * update_tx_info is called from the interrupt handler/NAPI to return cmdQ0 |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1437 | * information. |
| 1438 | */ |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1439 | static unsigned int update_tx_info(struct adapter *adapter, |
| 1440 | unsigned int flags, |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1441 | unsigned int pr0) |
| 1442 | { |
| 1443 | struct sge *sge = adapter->sge; |
| 1444 | struct cmdQ *cmdq = &sge->cmdQ[0]; |
| 1445 | |
| 1446 | cmdq->processed += pr0; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1447 | if (flags & (F_FL0_ENABLE | F_FL1_ENABLE)) { |
| 1448 | freelQs_empty(sge); |
| 1449 | flags &= ~(F_FL0_ENABLE | F_FL1_ENABLE); |
| 1450 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1451 | if (flags & F_CMDQ0_ENABLE) { |
| 1452 | clear_bit(CMDQ_STAT_RUNNING, &cmdq->status); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1453 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1454 | if (cmdq->cleaned + cmdq->in_use != cmdq->processed && |
| 1455 | !test_and_set_bit(CMDQ_STAT_LAST_PKT_DB, &cmdq->status)) { |
| 1456 | set_bit(CMDQ_STAT_RUNNING, &cmdq->status); |
| 1457 | writel(F_CMDQ0_ENABLE, adapter->regs + A_SG_DOORBELL); |
| 1458 | } |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1459 | if (sge->tx_sched) |
| 1460 | tasklet_hi_schedule(&sge->tx_sched->sched_tsk); |
| 1461 | |
| 1462 | flags &= ~F_CMDQ0_ENABLE; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1463 | } |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1464 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1465 | if (unlikely(sge->stopped_tx_queues != 0)) |
| 1466 | restart_tx_queues(sge); |
| 1467 | |
| 1468 | return flags; |
| 1469 | } |
| 1470 | |
| 1471 | /* |
| 1472 | * Process SGE responses, up to the supplied budget. Returns the number of |
| 1473 | * responses processed. A negative budget is effectively unlimited. |
| 1474 | */ |
| 1475 | static int process_responses(struct adapter *adapter, int budget) |
| 1476 | { |
| 1477 | struct sge *sge = adapter->sge; |
| 1478 | struct respQ *q = &sge->respQ; |
| 1479 | struct respQ_e *e = &q->entries[q->cidx]; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1480 | int done = 0; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1481 | unsigned int flags = 0; |
| 1482 | unsigned int cmdq_processed[SGE_CMDQ_N] = {0, 0}; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1483 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1484 | while (done < budget && e->GenerationBit == q->genbit) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1485 | flags |= e->Qsleeping; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1486 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1487 | cmdq_processed[0] += e->Cmdq0CreditReturn; |
| 1488 | cmdq_processed[1] += e->Cmdq1CreditReturn; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1489 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1490 | /* We batch updates to the TX side to avoid cacheline |
| 1491 | * ping-pong of TX state information on MP where the sender |
| 1492 | * might run on a different CPU than this function... |
| 1493 | */ |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1494 | if (unlikely((flags & F_CMDQ0_ENABLE) || cmdq_processed[0] > 64)) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1495 | flags = update_tx_info(adapter, flags, cmdq_processed[0]); |
| 1496 | cmdq_processed[0] = 0; |
| 1497 | } |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1498 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1499 | if (unlikely(cmdq_processed[1] > 16)) { |
| 1500 | sge->cmdQ[1].processed += cmdq_processed[1]; |
| 1501 | cmdq_processed[1] = 0; |
| 1502 | } |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1503 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1504 | if (likely(e->DataValid)) { |
| 1505 | struct freelQ *fl = &sge->freelQ[e->FreelistQid]; |
| 1506 | |
Eric Sesterhenn | 5d9428d | 2006-04-02 13:52:48 +0200 | [diff] [blame] | 1507 | BUG_ON(!e->Sop || !e->Eop); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1508 | if (unlikely(e->Offload)) |
| 1509 | unexpected_offload(adapter, fl); |
| 1510 | else |
| 1511 | sge_rx(sge, fl, e->BufferLength); |
| 1512 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1513 | ++done; |
| 1514 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1515 | /* |
| 1516 | * Note: this depends on each packet consuming a |
| 1517 | * single free-list buffer; cf. the BUG above. |
| 1518 | */ |
| 1519 | if (++fl->cidx == fl->size) |
| 1520 | fl->cidx = 0; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1521 | prefetch(fl->centries[fl->cidx].skb); |
| 1522 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1523 | if (unlikely(--fl->credits < |
| 1524 | fl->size - SGE_FREEL_REFILL_THRESH)) |
| 1525 | refill_free_list(sge, fl); |
| 1526 | } else |
| 1527 | sge->stats.pure_rsps++; |
| 1528 | |
| 1529 | e++; |
| 1530 | if (unlikely(++q->cidx == q->size)) { |
| 1531 | q->cidx = 0; |
| 1532 | q->genbit ^= 1; |
| 1533 | e = q->entries; |
| 1534 | } |
| 1535 | prefetch(e); |
| 1536 | |
| 1537 | if (++q->credits > SGE_RESPQ_REPLENISH_THRES) { |
| 1538 | writel(q->credits, adapter->regs + A_SG_RSPQUEUECREDIT); |
| 1539 | q->credits = 0; |
| 1540 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1541 | } |
| 1542 | |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1543 | flags = update_tx_info(adapter, flags, cmdq_processed[0]); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1544 | sge->cmdQ[1].processed += cmdq_processed[1]; |
| 1545 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1546 | return done; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1547 | } |
| 1548 | |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1549 | static inline int responses_pending(const struct adapter *adapter) |
| 1550 | { |
| 1551 | const struct respQ *Q = &adapter->sge->respQ; |
| 1552 | const struct respQ_e *e = &Q->entries[Q->cidx]; |
| 1553 | |
| 1554 | return (e->GenerationBit == Q->genbit); |
| 1555 | } |
| 1556 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1557 | /* |
| 1558 | * A simpler version of process_responses() that handles only pure (i.e., |
| 1559 | * non data-carrying) responses. Such respones are too light-weight to justify |
| 1560 | * calling a softirq when using NAPI, so we handle them specially in hard |
| 1561 | * interrupt context. The function is called with a pointer to a response, |
| 1562 | * which the caller must ensure is a valid pure response. Returns 1 if it |
| 1563 | * encounters a valid data-carrying response, 0 otherwise. |
| 1564 | */ |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1565 | static int process_pure_responses(struct adapter *adapter) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1566 | { |
| 1567 | struct sge *sge = adapter->sge; |
| 1568 | struct respQ *q = &sge->respQ; |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1569 | struct respQ_e *e = &q->entries[q->cidx]; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1570 | const struct freelQ *fl = &sge->freelQ[e->FreelistQid]; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1571 | unsigned int flags = 0; |
| 1572 | unsigned int cmdq_processed[SGE_CMDQ_N] = {0, 0}; |
| 1573 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1574 | prefetch(fl->centries[fl->cidx].skb); |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1575 | if (e->DataValid) |
| 1576 | return 1; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1577 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1578 | do { |
| 1579 | flags |= e->Qsleeping; |
| 1580 | |
| 1581 | cmdq_processed[0] += e->Cmdq0CreditReturn; |
| 1582 | cmdq_processed[1] += e->Cmdq1CreditReturn; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1583 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1584 | e++; |
| 1585 | if (unlikely(++q->cidx == q->size)) { |
| 1586 | q->cidx = 0; |
| 1587 | q->genbit ^= 1; |
| 1588 | e = q->entries; |
| 1589 | } |
| 1590 | prefetch(e); |
| 1591 | |
| 1592 | if (++q->credits > SGE_RESPQ_REPLENISH_THRES) { |
| 1593 | writel(q->credits, adapter->regs + A_SG_RSPQUEUECREDIT); |
| 1594 | q->credits = 0; |
| 1595 | } |
| 1596 | sge->stats.pure_rsps++; |
| 1597 | } while (e->GenerationBit == q->genbit && !e->DataValid); |
| 1598 | |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1599 | flags = update_tx_info(adapter, flags, cmdq_processed[0]); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1600 | sge->cmdQ[1].processed += cmdq_processed[1]; |
| 1601 | |
| 1602 | return e->GenerationBit == q->genbit; |
| 1603 | } |
| 1604 | |
| 1605 | /* |
| 1606 | * Handler for new data events when using NAPI. This does not need any locking |
| 1607 | * or protection from interrupts as data interrupts are off at this point and |
| 1608 | * other adapter interrupts do not interfere. |
| 1609 | */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1610 | int t1_poll(struct napi_struct *napi, int budget) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1611 | { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1612 | struct adapter *adapter = container_of(napi, struct adapter, napi); |
Divy Le Ray | 445cf80 | 2007-11-27 13:30:15 -0800 | [diff] [blame] | 1613 | int work_done = process_responses(adapter, budget); |
Stephen Hemminger | 7fe26a6 | 2006-12-08 11:08:33 -0800 | [diff] [blame] | 1614 | |
Divy Le Ray | 445cf80 | 2007-11-27 13:30:15 -0800 | [diff] [blame] | 1615 | if (likely(work_done < budget)) { |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 1616 | napi_complete(napi); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1617 | writel(adapter->sge->respQ.cidx, |
| 1618 | adapter->regs + A_SG_SLEEPING); |
| 1619 | } |
| 1620 | return work_done; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1621 | } |
| 1622 | |
Stephen Hemminger | 7fe26a6 | 2006-12-08 11:08:33 -0800 | [diff] [blame] | 1623 | irqreturn_t t1_interrupt(int irq, void *data) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1624 | { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1625 | struct adapter *adapter = data; |
| 1626 | struct sge *sge = adapter->sge; |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1627 | int handled; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1628 | |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1629 | if (likely(responses_pending(adapter))) { |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1630 | writel(F_PL_INTR_SGE_DATA, adapter->regs + A_PL_CAUSE); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1631 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1632 | if (napi_schedule_prep(&adapter->napi)) { |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1633 | if (process_pure_responses(adapter)) |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 1634 | __napi_schedule(&adapter->napi); |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1635 | else { |
| 1636 | /* no data, no NAPI needed */ |
| 1637 | writel(sge->respQ.cidx, adapter->regs + A_SG_SLEEPING); |
Francois Romieu | 4422b00 | 2008-07-11 00:29:19 +0200 | [diff] [blame] | 1638 | /* undo schedule_prep */ |
| 1639 | napi_enable(&adapter->napi); |
Stephen Hemminger | 7fe26a6 | 2006-12-08 11:08:33 -0800 | [diff] [blame] | 1640 | } |
Stephen Hemminger | 7fe26a6 | 2006-12-08 11:08:33 -0800 | [diff] [blame] | 1641 | } |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1642 | return IRQ_HANDLED; |
| 1643 | } |
| 1644 | |
| 1645 | spin_lock(&adapter->async_lock); |
| 1646 | handled = t1_slow_intr_handler(adapter); |
| 1647 | spin_unlock(&adapter->async_lock); |
Stephen Hemminger | 7fe26a6 | 2006-12-08 11:08:33 -0800 | [diff] [blame] | 1648 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1649 | if (!handled) |
| 1650 | sge->stats.unhandled_irqs++; |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1651 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1652 | return IRQ_RETVAL(handled != 0); |
| 1653 | } |
| 1654 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1655 | /* |
| 1656 | * Enqueues the sk_buff onto the cmdQ[qid] and has hardware fetch it. |
| 1657 | * |
| 1658 | * The code figures out how many entries the sk_buff will require in the |
| 1659 | * cmdQ and updates the cmdQ data structure with the state once the enqueue |
| 1660 | * has complete. Then, it doesn't access the global structure anymore, but |
| 1661 | * uses the corresponding fields on the stack. In conjuction with a spinlock |
| 1662 | * around that code, we can make the function reentrant without holding the |
| 1663 | * lock when we actually enqueue (which might be expensive, especially on |
| 1664 | * architectures with IO MMUs). |
| 1665 | * |
| 1666 | * This runs with softirqs disabled. |
| 1667 | */ |
Stephen Hemminger | aa84505 | 2005-12-14 14:38:44 -0800 | [diff] [blame] | 1668 | static int t1_sge_tx(struct sk_buff *skb, struct adapter *adapter, |
| 1669 | unsigned int qid, struct net_device *dev) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1670 | { |
| 1671 | struct sge *sge = adapter->sge; |
| 1672 | struct cmdQ *q = &sge->cmdQ[qid]; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1673 | unsigned int credits, pidx, genbit, count, use_sched_skb = 0; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1674 | |
Stephen Hemminger | cabdfb3 | 2006-12-01 16:36:22 -0800 | [diff] [blame] | 1675 | if (!spin_trylock(&q->lock)) |
| 1676 | return NETDEV_TX_LOCKED; |
| 1677 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1678 | reclaim_completed_tx(sge, q); |
| 1679 | |
| 1680 | pidx = q->pidx; |
| 1681 | credits = q->size - q->in_use; |
| 1682 | count = 1 + skb_shinfo(skb)->nr_frags; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1683 | count += compute_large_page_tx_descs(skb); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1684 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1685 | /* Ethernet packet */ |
| 1686 | if (unlikely(credits < count)) { |
| 1687 | if (!netif_queue_stopped(dev)) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1688 | netif_stop_queue(dev); |
| 1689 | set_bit(dev->if_port, &sge->stopped_tx_queues); |
Scott Bardone | 232a347 | 2006-03-16 19:20:40 -0500 | [diff] [blame] | 1690 | sge->stats.cmdQ_full[2]++; |
Joe Perches | c1f5121 | 2010-02-22 16:56:57 +0000 | [diff] [blame] | 1691 | pr_err("%s: Tx ring full while queue awake!\n", |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1692 | adapter->name); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1693 | } |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1694 | spin_unlock(&q->lock); |
| 1695 | return NETDEV_TX_BUSY; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1696 | } |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1697 | |
| 1698 | if (unlikely(credits - count < q->stop_thres)) { |
| 1699 | netif_stop_queue(dev); |
| 1700 | set_bit(dev->if_port, &sge->stopped_tx_queues); |
| 1701 | sge->stats.cmdQ_full[2]++; |
| 1702 | } |
| 1703 | |
| 1704 | /* T204 cmdQ0 skbs that are destined for a certain port have to go |
| 1705 | * through the scheduler. |
| 1706 | */ |
| 1707 | if (sge->tx_sched && !qid && skb->dev) { |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1708 | use_sched: |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1709 | use_sched_skb = 1; |
| 1710 | /* Note that the scheduler might return a different skb than |
| 1711 | * the one passed in. |
| 1712 | */ |
| 1713 | skb = sched_skb(sge, skb, credits); |
| 1714 | if (!skb) { |
| 1715 | spin_unlock(&q->lock); |
| 1716 | return NETDEV_TX_OK; |
| 1717 | } |
| 1718 | pidx = q->pidx; |
| 1719 | count = 1 + skb_shinfo(skb)->nr_frags; |
| 1720 | count += compute_large_page_tx_descs(skb); |
| 1721 | } |
| 1722 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1723 | q->in_use += count; |
| 1724 | genbit = q->genbit; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1725 | pidx = q->pidx; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1726 | q->pidx += count; |
| 1727 | if (q->pidx >= q->size) { |
| 1728 | q->pidx -= q->size; |
| 1729 | q->genbit ^= 1; |
| 1730 | } |
| 1731 | spin_unlock(&q->lock); |
| 1732 | |
| 1733 | write_tx_descs(adapter, skb, pidx, genbit, q); |
| 1734 | |
| 1735 | /* |
| 1736 | * We always ring the doorbell for cmdQ1. For cmdQ0, we only ring |
| 1737 | * the doorbell if the Q is asleep. There is a natural race, where |
| 1738 | * the hardware is going to sleep just after we checked, however, |
| 1739 | * then the interrupt handler will detect the outstanding TX packet |
| 1740 | * and ring the doorbell for us. |
| 1741 | */ |
| 1742 | if (qid) |
| 1743 | doorbell_pio(adapter, F_CMDQ1_ENABLE); |
| 1744 | else { |
| 1745 | clear_bit(CMDQ_STAT_LAST_PKT_DB, &q->status); |
| 1746 | if (test_and_set_bit(CMDQ_STAT_RUNNING, &q->status) == 0) { |
| 1747 | set_bit(CMDQ_STAT_LAST_PKT_DB, &q->status); |
| 1748 | writel(F_CMDQ0_ENABLE, adapter->regs + A_SG_DOORBELL); |
| 1749 | } |
| 1750 | } |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1751 | |
| 1752 | if (use_sched_skb) { |
| 1753 | if (spin_trylock(&q->lock)) { |
| 1754 | credits = q->size - q->in_use; |
| 1755 | skb = NULL; |
| 1756 | goto use_sched; |
| 1757 | } |
| 1758 | } |
Stephen Hemminger | aa84505 | 2005-12-14 14:38:44 -0800 | [diff] [blame] | 1759 | return NETDEV_TX_OK; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1760 | } |
| 1761 | |
| 1762 | #define MK_ETH_TYPE_MSS(type, mss) (((mss) & 0x3FFF) | ((type) << 14)) |
| 1763 | |
| 1764 | /* |
| 1765 | * eth_hdr_len - return the length of an Ethernet header |
| 1766 | * @data: pointer to the start of the Ethernet header |
| 1767 | * |
| 1768 | * Returns the length of an Ethernet header, including optional VLAN tag. |
| 1769 | */ |
| 1770 | static inline int eth_hdr_len(const void *data) |
| 1771 | { |
| 1772 | const struct ethhdr *e = data; |
| 1773 | |
| 1774 | return e->h_proto == htons(ETH_P_8021Q) ? VLAN_ETH_HLEN : ETH_HLEN; |
| 1775 | } |
| 1776 | |
| 1777 | /* |
| 1778 | * Adds the CPL header to the sk_buff and passes it to t1_sge_tx. |
| 1779 | */ |
Stephen Hemminger | 61357325 | 2009-08-31 19:50:58 +0000 | [diff] [blame] | 1780 | netdev_tx_t t1_start_xmit(struct sk_buff *skb, struct net_device *dev) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1781 | { |
Wang Chen | c3ccc12 | 2008-11-16 23:06:39 -0800 | [diff] [blame] | 1782 | struct adapter *adapter = dev->ml_priv; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1783 | struct sge *sge = adapter->sge; |
Christoph Lameter | ca0c958 | 2009-10-03 19:48:22 +0900 | [diff] [blame] | 1784 | struct sge_port_stats *st = this_cpu_ptr(sge->port_stats[dev->if_port]); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1785 | struct cpl_tx_pkt *cpl; |
Stephen Hemminger | cabdfb3 | 2006-12-01 16:36:22 -0800 | [diff] [blame] | 1786 | struct sk_buff *orig_skb = skb; |
| 1787 | int ret; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1788 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1789 | if (skb->protocol == htons(ETH_P_CPL5)) |
| 1790 | goto send; |
| 1791 | |
Divy Le Ray | 7832ee0 | 2007-11-27 13:30:09 -0800 | [diff] [blame] | 1792 | /* |
| 1793 | * We are using a non-standard hard_header_len. |
| 1794 | * Allocate more header room in the rare cases it is not big enough. |
| 1795 | */ |
| 1796 | if (unlikely(skb_headroom(skb) < dev->hard_header_len - ETH_HLEN)) { |
| 1797 | skb = skb_realloc_headroom(skb, sizeof(struct cpl_tx_pkt_lso)); |
| 1798 | ++st->tx_need_hdrroom; |
| 1799 | dev_kfree_skb_any(orig_skb); |
| 1800 | if (!skb) |
| 1801 | return NETDEV_TX_OK; |
| 1802 | } |
| 1803 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1804 | if (skb_shinfo(skb)->gso_size) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1805 | int eth_type; |
| 1806 | struct cpl_tx_pkt_lso *hdr; |
| 1807 | |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1808 | ++st->tx_tso; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1809 | |
Arnaldo Carvalho de Melo | bbe735e | 2007-03-10 22:16:10 -0300 | [diff] [blame] | 1810 | eth_type = skb_network_offset(skb) == ETH_HLEN ? |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1811 | CPL_ETH_II : CPL_ETH_II_VLAN; |
| 1812 | |
| 1813 | hdr = (struct cpl_tx_pkt_lso *)skb_push(skb, sizeof(*hdr)); |
| 1814 | hdr->opcode = CPL_TX_PKT_LSO; |
| 1815 | hdr->ip_csum_dis = hdr->l4_csum_dis = 0; |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1816 | hdr->ip_hdr_words = ip_hdr(skb)->ihl; |
Arnaldo Carvalho de Melo | aa8223c | 2007-04-10 21:04:22 -0700 | [diff] [blame] | 1817 | hdr->tcp_hdr_words = tcp_hdr(skb)->doff; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1818 | hdr->eth_type_mss = htons(MK_ETH_TYPE_MSS(eth_type, |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1819 | skb_shinfo(skb)->gso_size)); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1820 | hdr->len = htonl(skb->len - sizeof(*hdr)); |
| 1821 | cpl = (struct cpl_tx_pkt *)hdr; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1822 | } else { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1823 | /* |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1824 | * Packets shorter than ETH_HLEN can break the MAC, drop them |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1825 | * early. Also, we may get oversized packets because some |
| 1826 | * parts of the kernel don't handle our unusual hard_header_len |
| 1827 | * right, drop those too. |
| 1828 | */ |
| 1829 | if (unlikely(skb->len < ETH_HLEN || |
| 1830 | skb->len > dev->mtu + eth_hdr_len(skb->data))) { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1831 | pr_debug("%s: packet size %d hdr %d mtu%d\n", dev->name, |
| 1832 | skb->len, eth_hdr_len(skb->data), dev->mtu); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1833 | dev_kfree_skb_any(skb); |
Stephen Hemminger | aa84505 | 2005-12-14 14:38:44 -0800 | [diff] [blame] | 1834 | return NETDEV_TX_OK; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1835 | } |
| 1836 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1837 | if (!(adapter->flags & UDP_CSUM_CAPABLE) && |
Patrick McHardy | 84fa793 | 2006-08-29 16:44:56 -0700 | [diff] [blame] | 1838 | skb->ip_summed == CHECKSUM_PARTIAL && |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1839 | ip_hdr(skb)->protocol == IPPROTO_UDP) { |
Patrick McHardy | 84fa793 | 2006-08-29 16:44:56 -0700 | [diff] [blame] | 1840 | if (unlikely(skb_checksum_help(skb))) { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1841 | pr_debug("%s: unable to do udp checksum\n", dev->name); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1842 | dev_kfree_skb_any(skb); |
Stephen Hemminger | aa84505 | 2005-12-14 14:38:44 -0800 | [diff] [blame] | 1843 | return NETDEV_TX_OK; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1844 | } |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1845 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1846 | |
| 1847 | /* Hmmm, assuming to catch the gratious arp... and we'll use |
| 1848 | * it to flush out stuck espi packets... |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1849 | */ |
| 1850 | if ((unlikely(!adapter->sge->espibug_skb[dev->if_port]))) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1851 | if (skb->protocol == htons(ETH_P_ARP) && |
Arnaldo Carvalho de Melo | d0a92be | 2007-03-12 20:56:31 -0300 | [diff] [blame] | 1852 | arp_hdr(skb)->ar_op == htons(ARPOP_REQUEST)) { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1853 | adapter->sge->espibug_skb[dev->if_port] = skb; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1854 | /* We want to re-use this skb later. We |
| 1855 | * simply bump the reference count and it |
| 1856 | * will not be freed... |
| 1857 | */ |
| 1858 | skb = skb_get(skb); |
| 1859 | } |
| 1860 | } |
| 1861 | |
| 1862 | cpl = (struct cpl_tx_pkt *)__skb_push(skb, sizeof(*cpl)); |
| 1863 | cpl->opcode = CPL_TX_PKT; |
| 1864 | cpl->ip_csum_dis = 1; /* SW calculates IP csum */ |
Patrick McHardy | 84fa793 | 2006-08-29 16:44:56 -0700 | [diff] [blame] | 1865 | cpl->l4_csum_dis = skb->ip_summed == CHECKSUM_PARTIAL ? 0 : 1; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1866 | /* the length field isn't used so don't bother setting it */ |
| 1867 | |
Patrick McHardy | 84fa793 | 2006-08-29 16:44:56 -0700 | [diff] [blame] | 1868 | st->tx_cso += (skb->ip_summed == CHECKSUM_PARTIAL); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1869 | } |
| 1870 | cpl->iff = dev->if_port; |
| 1871 | |
| 1872 | #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) |
| 1873 | if (adapter->vlan_grp && vlan_tx_tag_present(skb)) { |
| 1874 | cpl->vlan_valid = 1; |
| 1875 | cpl->vlan = htons(vlan_tx_tag_get(skb)); |
| 1876 | st->vlan_insert++; |
| 1877 | } else |
| 1878 | #endif |
| 1879 | cpl->vlan_valid = 0; |
| 1880 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1881 | send: |
Stephen Hemminger | cabdfb3 | 2006-12-01 16:36:22 -0800 | [diff] [blame] | 1882 | ret = t1_sge_tx(skb, adapter, 0, dev); |
| 1883 | |
| 1884 | /* If transmit busy, and we reallocated skb's due to headroom limit, |
| 1885 | * then silently discard to avoid leak. |
| 1886 | */ |
| 1887 | if (unlikely(ret != NETDEV_TX_OK && skb != orig_skb)) { |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1888 | dev_kfree_skb_any(skb); |
Stephen Hemminger | cabdfb3 | 2006-12-01 16:36:22 -0800 | [diff] [blame] | 1889 | ret = NETDEV_TX_OK; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1890 | } |
Stephen Hemminger | cabdfb3 | 2006-12-01 16:36:22 -0800 | [diff] [blame] | 1891 | return ret; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1892 | } |
| 1893 | |
| 1894 | /* |
| 1895 | * Callback for the Tx buffer reclaim timer. Runs with softirqs disabled. |
| 1896 | */ |
| 1897 | static void sge_tx_reclaim_cb(unsigned long data) |
| 1898 | { |
| 1899 | int i; |
| 1900 | struct sge *sge = (struct sge *)data; |
| 1901 | |
| 1902 | for (i = 0; i < SGE_CMDQ_N; ++i) { |
| 1903 | struct cmdQ *q = &sge->cmdQ[i]; |
| 1904 | |
| 1905 | if (!spin_trylock(&q->lock)) |
| 1906 | continue; |
| 1907 | |
| 1908 | reclaim_completed_tx(sge, q); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1909 | if (i == 0 && q->in_use) { /* flush pending credits */ |
| 1910 | writel(F_CMDQ0_ENABLE, sge->adapter->regs + A_SG_DOORBELL); |
| 1911 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1912 | spin_unlock(&q->lock); |
| 1913 | } |
| 1914 | mod_timer(&sge->tx_reclaim_timer, jiffies + TX_RECLAIM_PERIOD); |
| 1915 | } |
| 1916 | |
| 1917 | /* |
| 1918 | * Propagate changes of the SGE coalescing parameters to the HW. |
| 1919 | */ |
| 1920 | int t1_sge_set_coalesce_params(struct sge *sge, struct sge_params *p) |
| 1921 | { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1922 | sge->fixed_intrtimer = p->rx_coalesce_usecs * |
| 1923 | core_ticks_per_usec(sge->adapter); |
| 1924 | writel(sge->fixed_intrtimer, sge->adapter->regs + A_SG_INTRTIMER); |
| 1925 | return 0; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1926 | } |
| 1927 | |
| 1928 | /* |
| 1929 | * Allocates both RX and TX resources and configures the SGE. However, |
| 1930 | * the hardware is not enabled yet. |
| 1931 | */ |
| 1932 | int t1_sge_configure(struct sge *sge, struct sge_params *p) |
| 1933 | { |
| 1934 | if (alloc_rx_resources(sge, p)) |
| 1935 | return -ENOMEM; |
| 1936 | if (alloc_tx_resources(sge, p)) { |
| 1937 | free_rx_resources(sge); |
| 1938 | return -ENOMEM; |
| 1939 | } |
| 1940 | configure_sge(sge, p); |
| 1941 | |
| 1942 | /* |
| 1943 | * Now that we have sized the free lists calculate the payload |
| 1944 | * capacity of the large buffers. Other parts of the driver use |
| 1945 | * this to set the max offload coalescing size so that RX packets |
| 1946 | * do not overflow our large buffers. |
| 1947 | */ |
| 1948 | p->large_buf_capacity = jumbo_payload_capacity(sge); |
| 1949 | return 0; |
| 1950 | } |
| 1951 | |
| 1952 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1953 | * Disables the DMA engine. |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1954 | */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1955 | void t1_sge_stop(struct sge *sge) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1956 | { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1957 | int i; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1958 | writel(0, sge->adapter->regs + A_SG_CONTROL); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1959 | readl(sge->adapter->regs + A_SG_CONTROL); /* flush */ |
| 1960 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1961 | if (is_T2(sge->adapter)) |
| 1962 | del_timer_sync(&sge->espibug_timer); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1963 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1964 | del_timer_sync(&sge->tx_reclaim_timer); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1965 | if (sge->tx_sched) |
| 1966 | tx_sched_stop(sge); |
| 1967 | |
| 1968 | for (i = 0; i < MAX_NPORTS; i++) |
Wei Yongjun | f4fe5a9 | 2009-02-25 00:45:09 +0000 | [diff] [blame] | 1969 | kfree_skb(sge->espibug_skb[i]); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1970 | } |
| 1971 | |
| 1972 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1973 | * Enables the DMA engine. |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1974 | */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1975 | void t1_sge_start(struct sge *sge) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1976 | { |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1977 | refill_free_list(sge, &sge->freelQ[0]); |
| 1978 | refill_free_list(sge, &sge->freelQ[1]); |
| 1979 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1980 | writel(sge->sge_control, sge->adapter->regs + A_SG_CONTROL); |
| 1981 | doorbell_pio(sge->adapter, F_FL0_ENABLE | F_FL1_ENABLE); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1982 | readl(sge->adapter->regs + A_SG_CONTROL); /* flush */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1983 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1984 | mod_timer(&sge->tx_reclaim_timer, jiffies + TX_RECLAIM_PERIOD); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1985 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1986 | if (is_T2(sge->adapter)) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1987 | mod_timer(&sge->espibug_timer, jiffies + sge->espibug_timeout); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1988 | } |
| 1989 | |
| 1990 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1991 | * Callback for the T2 ESPI 'stuck packet feature' workaorund |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1992 | */ |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1993 | static void espibug_workaround_t204(unsigned long data) |
| 1994 | { |
| 1995 | struct adapter *adapter = (struct adapter *)data; |
| 1996 | struct sge *sge = adapter->sge; |
| 1997 | unsigned int nports = adapter->params.nports; |
| 1998 | u32 seop[MAX_NPORTS]; |
| 1999 | |
| 2000 | if (adapter->open_device_map & PORT_MASK) { |
| 2001 | int i; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2002 | |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 2003 | if (t1_espi_get_mon_t204(adapter, &(seop[0]), 0) < 0) |
| 2004 | return; |
| 2005 | |
| 2006 | for (i = 0; i < nports; i++) { |
| 2007 | struct sk_buff *skb = sge->espibug_skb[i]; |
| 2008 | |
| 2009 | if (!netif_running(adapter->port[i].dev) || |
| 2010 | netif_queue_stopped(adapter->port[i].dev) || |
| 2011 | !seop[i] || ((seop[i] & 0xfff) != 0) || !skb) |
| 2012 | continue; |
| 2013 | |
| 2014 | if (!skb->cb[0]) { |
| 2015 | u8 ch_mac_addr[ETH_ALEN] = { |
| 2016 | 0x0, 0x7, 0x43, 0x0, 0x0, 0x0 |
| 2017 | }; |
| 2018 | |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 2019 | skb_copy_to_linear_data_offset(skb, |
| 2020 | sizeof(struct cpl_tx_pkt), |
| 2021 | ch_mac_addr, |
| 2022 | ETH_ALEN); |
| 2023 | skb_copy_to_linear_data_offset(skb, |
| 2024 | skb->len - 10, |
| 2025 | ch_mac_addr, |
| 2026 | ETH_ALEN); |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 2027 | skb->cb[0] = 0xff; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2028 | } |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 2029 | |
| 2030 | /* bump the reference count to avoid freeing of |
| 2031 | * the skb once the DMA has completed. |
| 2032 | */ |
| 2033 | skb = skb_get(skb); |
| 2034 | t1_sge_tx(skb, adapter, 0, adapter->port[i].dev); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2035 | } |
| 2036 | } |
| 2037 | mod_timer(&sge->espibug_timer, jiffies + sge->espibug_timeout); |
| 2038 | } |
| 2039 | |
| 2040 | static void espibug_workaround(unsigned long data) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2041 | { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2042 | struct adapter *adapter = (struct adapter *)data; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2043 | struct sge *sge = adapter->sge; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2044 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2045 | if (netif_running(adapter->port[0].dev)) { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2046 | struct sk_buff *skb = sge->espibug_skb[0]; |
| 2047 | u32 seop = t1_espi_get_mon(adapter, 0x930, 0); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2048 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2049 | if ((seop & 0xfff0fff) == 0xfff && skb) { |
| 2050 | if (!skb->cb[0]) { |
| 2051 | u8 ch_mac_addr[ETH_ALEN] = |
| 2052 | {0x0, 0x7, 0x43, 0x0, 0x0, 0x0}; |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 2053 | skb_copy_to_linear_data_offset(skb, |
| 2054 | sizeof(struct cpl_tx_pkt), |
| 2055 | ch_mac_addr, |
| 2056 | ETH_ALEN); |
| 2057 | skb_copy_to_linear_data_offset(skb, |
| 2058 | skb->len - 10, |
| 2059 | ch_mac_addr, |
| 2060 | ETH_ALEN); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2061 | skb->cb[0] = 0xff; |
| 2062 | } |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2063 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2064 | /* bump the reference count to avoid freeing of the |
| 2065 | * skb once the DMA has completed. |
| 2066 | */ |
| 2067 | skb = skb_get(skb); |
| 2068 | t1_sge_tx(skb, adapter, 0, adapter->port[0].dev); |
| 2069 | } |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2070 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2071 | mod_timer(&sge->espibug_timer, jiffies + sge->espibug_timeout); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2072 | } |
| 2073 | |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2074 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2075 | * Creates a t1_sge structure and returns suggested resource parameters. |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2076 | */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2077 | struct sge * __devinit t1_sge_create(struct adapter *adapter, |
| 2078 | struct sge_params *p) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2079 | { |
Stephen Hemminger | cbee9f9 | 2006-11-17 17:01:52 -0800 | [diff] [blame] | 2080 | struct sge *sge = kzalloc(sizeof(*sge), GFP_KERNEL); |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 2081 | int i; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2082 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2083 | if (!sge) |
| 2084 | return NULL; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2085 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2086 | sge->adapter = adapter; |
| 2087 | sge->netdev = adapter->port[0].dev; |
| 2088 | sge->rx_pkt_pad = t1_is_T1B(adapter) ? 0 : 2; |
| 2089 | sge->jumbo_fl = t1_is_T1B(adapter) ? 1 : 0; |
| 2090 | |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 2091 | for_each_port(adapter, i) { |
| 2092 | sge->port_stats[i] = alloc_percpu(struct sge_port_stats); |
| 2093 | if (!sge->port_stats[i]) |
| 2094 | goto nomem_port; |
| 2095 | } |
| 2096 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2097 | init_timer(&sge->tx_reclaim_timer); |
| 2098 | sge->tx_reclaim_timer.data = (unsigned long)sge; |
| 2099 | sge->tx_reclaim_timer.function = sge_tx_reclaim_cb; |
| 2100 | |
| 2101 | if (is_T2(sge->adapter)) { |
| 2102 | init_timer(&sge->espibug_timer); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2103 | |
| 2104 | if (adapter->params.nports > 1) { |
| 2105 | tx_sched_init(sge); |
| 2106 | sge->espibug_timer.function = espibug_workaround_t204; |
Francois Romieu | d748742 | 2006-12-11 23:49:13 +0100 | [diff] [blame] | 2107 | } else |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2108 | sge->espibug_timer.function = espibug_workaround; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2109 | sge->espibug_timer.data = (unsigned long)sge->adapter; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2110 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2111 | sge->espibug_timeout = 1; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2112 | /* for T204, every 10ms */ |
| 2113 | if (adapter->params.nports > 1) |
| 2114 | sge->espibug_timeout = HZ/100; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2115 | } |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 2116 | |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2117 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2118 | p->cmdQ_size[0] = SGE_CMDQ0_E_N; |
| 2119 | p->cmdQ_size[1] = SGE_CMDQ1_E_N; |
| 2120 | p->freelQ_size[!sge->jumbo_fl] = SGE_FREEL_SIZE; |
| 2121 | p->freelQ_size[sge->jumbo_fl] = SGE_JUMBO_FREEL_SIZE; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2122 | if (sge->tx_sched) { |
| 2123 | if (board_info(sge->adapter)->board == CHBT_BOARD_CHT204) |
| 2124 | p->rx_coalesce_usecs = 15; |
| 2125 | else |
| 2126 | p->rx_coalesce_usecs = 50; |
| 2127 | } else |
| 2128 | p->rx_coalesce_usecs = 50; |
| 2129 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2130 | p->coalesce_enable = 0; |
| 2131 | p->sample_interval_usecs = 0; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2132 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2133 | return sge; |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 2134 | nomem_port: |
| 2135 | while (i >= 0) { |
| 2136 | free_percpu(sge->port_stats[i]); |
| 2137 | --i; |
| 2138 | } |
| 2139 | kfree(sge); |
| 2140 | return NULL; |
| 2141 | |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2142 | } |