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> |
Paul Gortmaker | 70c7160 | 2011-05-22 16:47:17 -0400 | [diff] [blame] | 57 | #include <linux/prefetch.h> |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 58 | |
| 59 | #include "cpl5_cmd.h" |
| 60 | #include "sge.h" |
| 61 | #include "regs.h" |
| 62 | #include "espi.h" |
| 63 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 64 | /* This belongs in if_ether.h */ |
| 65 | #define ETH_P_CPL5 0xf |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 66 | |
| 67 | #define SGE_CMDQ_N 2 |
| 68 | #define SGE_FREELQ_N 2 |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 69 | #define SGE_CMDQ0_E_N 1024 |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 70 | #define SGE_CMDQ1_E_N 128 |
| 71 | #define SGE_FREEL_SIZE 4096 |
| 72 | #define SGE_JUMBO_FREEL_SIZE 512 |
| 73 | #define SGE_FREEL_REFILL_THRESH 16 |
| 74 | #define SGE_RESPQ_E_N 1024 |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 75 | #define SGE_INTRTIMER_NRES 1000 |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 76 | #define SGE_RX_SM_BUF_SIZE 1536 |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 77 | #define SGE_TX_DESC_MAX_PLEN 16384 |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 78 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 79 | #define SGE_RESPQ_REPLENISH_THRES (SGE_RESPQ_E_N / 4) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 80 | |
| 81 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 82 | * Period of the TX buffer reclaim timer. This timer does not need to run |
| 83 | * frequently as TX buffers are usually reclaimed by new TX packets. |
| 84 | */ |
| 85 | #define TX_RECLAIM_PERIOD (HZ / 4) |
| 86 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 87 | #define M_CMD_LEN 0x7fffffff |
| 88 | #define V_CMD_LEN(v) (v) |
| 89 | #define G_CMD_LEN(v) ((v) & M_CMD_LEN) |
| 90 | #define V_CMD_GEN1(v) ((v) << 31) |
| 91 | #define V_CMD_GEN2(v) (v) |
| 92 | #define F_CMD_DATAVALID (1 << 1) |
| 93 | #define F_CMD_SOP (1 << 2) |
| 94 | #define V_CMD_EOP(v) ((v) << 3) |
| 95 | |
| 96 | /* |
| 97 | * Command queue, receive buffer list, and response queue descriptors. |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 98 | */ |
| 99 | #if defined(__BIG_ENDIAN_BITFIELD) |
| 100 | struct cmdQ_e { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 101 | u32 addr_lo; |
| 102 | u32 len_gen; |
| 103 | u32 flags; |
| 104 | u32 addr_hi; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 105 | }; |
| 106 | |
| 107 | struct freelQ_e { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 108 | u32 addr_lo; |
| 109 | u32 len_gen; |
| 110 | u32 gen2; |
| 111 | u32 addr_hi; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 112 | }; |
| 113 | |
| 114 | struct respQ_e { |
| 115 | u32 Qsleeping : 4; |
| 116 | u32 Cmdq1CreditReturn : 5; |
| 117 | u32 Cmdq1DmaComplete : 5; |
| 118 | u32 Cmdq0CreditReturn : 5; |
| 119 | u32 Cmdq0DmaComplete : 5; |
| 120 | u32 FreelistQid : 2; |
| 121 | u32 CreditValid : 1; |
| 122 | u32 DataValid : 1; |
| 123 | u32 Offload : 1; |
| 124 | u32 Eop : 1; |
| 125 | u32 Sop : 1; |
| 126 | u32 GenerationBit : 1; |
| 127 | u32 BufferLength; |
| 128 | }; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 129 | #elif defined(__LITTLE_ENDIAN_BITFIELD) |
| 130 | struct cmdQ_e { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 131 | u32 len_gen; |
| 132 | u32 addr_lo; |
| 133 | u32 addr_hi; |
| 134 | u32 flags; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 135 | }; |
| 136 | |
| 137 | struct freelQ_e { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 138 | u32 len_gen; |
| 139 | u32 addr_lo; |
| 140 | u32 addr_hi; |
| 141 | u32 gen2; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 142 | }; |
| 143 | |
| 144 | struct respQ_e { |
| 145 | u32 BufferLength; |
| 146 | u32 GenerationBit : 1; |
| 147 | u32 Sop : 1; |
| 148 | u32 Eop : 1; |
| 149 | u32 Offload : 1; |
| 150 | u32 DataValid : 1; |
| 151 | u32 CreditValid : 1; |
| 152 | u32 FreelistQid : 2; |
| 153 | u32 Cmdq0DmaComplete : 5; |
| 154 | u32 Cmdq0CreditReturn : 5; |
| 155 | u32 Cmdq1DmaComplete : 5; |
| 156 | u32 Cmdq1CreditReturn : 5; |
| 157 | u32 Qsleeping : 4; |
| 158 | } ; |
| 159 | #endif |
| 160 | |
| 161 | /* |
| 162 | * SW Context Command and Freelist Queue Descriptors |
| 163 | */ |
| 164 | struct cmdQ_ce { |
| 165 | struct sk_buff *skb; |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 166 | DEFINE_DMA_UNMAP_ADDR(dma_addr); |
| 167 | DEFINE_DMA_UNMAP_LEN(dma_len); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 168 | }; |
| 169 | |
| 170 | struct freelQ_ce { |
| 171 | struct sk_buff *skb; |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 172 | DEFINE_DMA_UNMAP_ADDR(dma_addr); |
| 173 | DEFINE_DMA_UNMAP_LEN(dma_len); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 174 | }; |
| 175 | |
| 176 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 177 | * SW command, freelist and response rings |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 178 | */ |
| 179 | struct cmdQ { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 180 | unsigned long status; /* HW DMA fetch status */ |
| 181 | unsigned int in_use; /* # of in-use command descriptors */ |
| 182 | unsigned int size; /* # of descriptors */ |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 183 | unsigned int processed; /* total # of descs HW has processed */ |
| 184 | unsigned int cleaned; /* total # of descs SW has reclaimed */ |
| 185 | unsigned int stop_thres; /* SW TX queue suspend threshold */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 186 | u16 pidx; /* producer index (SW) */ |
| 187 | u16 cidx; /* consumer index (HW) */ |
| 188 | u8 genbit; /* current generation (=valid) bit */ |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 189 | u8 sop; /* is next entry start of packet? */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 190 | struct cmdQ_e *entries; /* HW command descriptor Q */ |
| 191 | struct cmdQ_ce *centries; /* SW command context descriptor Q */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 192 | dma_addr_t dma_addr; /* DMA addr HW command descriptor Q */ |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 193 | spinlock_t lock; /* Lock to protect cmdQ enqueuing */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 194 | }; |
| 195 | |
| 196 | struct freelQ { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 197 | unsigned int credits; /* # of available RX buffers */ |
| 198 | unsigned int size; /* free list capacity */ |
| 199 | u16 pidx; /* producer index (SW) */ |
| 200 | u16 cidx; /* consumer index (HW) */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 201 | u16 rx_buffer_size; /* Buffer size on this free list */ |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 202 | u16 dma_offset; /* DMA offset to align IP headers */ |
| 203 | u16 recycleq_idx; /* skb recycle q to use */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 204 | u8 genbit; /* current generation (=valid) bit */ |
| 205 | struct freelQ_e *entries; /* HW freelist descriptor Q */ |
| 206 | struct freelQ_ce *centries; /* SW freelist context descriptor Q */ |
| 207 | dma_addr_t dma_addr; /* DMA addr HW freelist descriptor Q */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 208 | }; |
| 209 | |
| 210 | struct respQ { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 211 | unsigned int credits; /* credits to be returned to SGE */ |
| 212 | unsigned int size; /* # of response Q descriptors */ |
| 213 | u16 cidx; /* consumer index (SW) */ |
| 214 | u8 genbit; /* current generation(=valid) bit */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 215 | struct respQ_e *entries; /* HW response descriptor Q */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 216 | dma_addr_t dma_addr; /* DMA addr HW response descriptor Q */ |
| 217 | }; |
| 218 | |
| 219 | /* Bit flags for cmdQ.status */ |
| 220 | enum { |
| 221 | CMDQ_STAT_RUNNING = 1, /* fetch engine is running */ |
| 222 | CMDQ_STAT_LAST_PKT_DB = 2 /* last packet rung the doorbell */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 223 | }; |
| 224 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 225 | /* T204 TX SW scheduler */ |
| 226 | |
| 227 | /* Per T204 TX port */ |
| 228 | struct sched_port { |
| 229 | unsigned int avail; /* available bits - quota */ |
| 230 | unsigned int drain_bits_per_1024ns; /* drain rate */ |
| 231 | unsigned int speed; /* drain rate, mbps */ |
| 232 | unsigned int mtu; /* mtu size */ |
| 233 | struct sk_buff_head skbq; /* pending skbs */ |
| 234 | }; |
| 235 | |
| 236 | /* Per T204 device */ |
| 237 | struct sched { |
| 238 | ktime_t last_updated; /* last time quotas were computed */ |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 239 | unsigned int max_avail; /* max bits to be sent to any port */ |
| 240 | unsigned int port; /* port index (round robin ports) */ |
| 241 | unsigned int num; /* num skbs in per port queues */ |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 242 | struct sched_port p[MAX_NPORTS]; |
| 243 | struct tasklet_struct sched_tsk;/* tasklet used to run scheduler */ |
| 244 | }; |
| 245 | static void restart_sched(unsigned long); |
| 246 | |
| 247 | |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 248 | /* |
| 249 | * Main SGE data structure |
| 250 | * |
| 251 | * Interrupts are handled by a single CPU and it is likely that on a MP system |
| 252 | * 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] | 253 | * 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] | 254 | * contention. |
| 255 | */ |
| 256 | struct sge { |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 257 | struct adapter *adapter; /* adapter backpointer */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 258 | struct net_device *netdev; /* netdevice backpointer */ |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 259 | struct freelQ freelQ[SGE_FREELQ_N]; /* buffer free lists */ |
| 260 | struct respQ respQ; /* response Q */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 261 | unsigned long stopped_tx_queues; /* bitmap of suspended Tx queues */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 262 | unsigned int rx_pkt_pad; /* RX padding for L2 packets */ |
| 263 | unsigned int jumbo_fl; /* jumbo freelist Q index */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 264 | unsigned int intrtimer_nres; /* no-resource interrupt timer */ |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 265 | unsigned int fixed_intrtimer;/* non-adaptive interrupt timer */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 266 | struct timer_list tx_reclaim_timer; /* reclaims TX buffers */ |
| 267 | struct timer_list espibug_timer; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 268 | unsigned long espibug_timeout; |
| 269 | struct sk_buff *espibug_skb[MAX_NPORTS]; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 270 | u32 sge_control; /* shadow value of sge control reg */ |
| 271 | struct sge_intr_counts stats; |
Tejun Heo | 47d7427 | 2010-02-16 15:21:08 +0000 | [diff] [blame] | 272 | struct sge_port_stats __percpu *port_stats[MAX_NPORTS]; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 273 | struct sched *tx_sched; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 274 | struct cmdQ cmdQ[SGE_CMDQ_N] ____cacheline_aligned_in_smp; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 275 | }; |
| 276 | |
Joe Perches | 215faf9 | 2010-12-21 02:16:10 -0800 | [diff] [blame] | 277 | static const u8 ch_mac_addr[ETH_ALEN] = { |
| 278 | 0x0, 0x7, 0x43, 0x0, 0x0, 0x0 |
| 279 | }; |
| 280 | |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 281 | /* |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 282 | * stop tasklet and free all pending skb's |
| 283 | */ |
| 284 | static void tx_sched_stop(struct sge *sge) |
| 285 | { |
| 286 | struct sched *s = sge->tx_sched; |
| 287 | int i; |
| 288 | |
| 289 | tasklet_kill(&s->sched_tsk); |
| 290 | |
| 291 | for (i = 0; i < MAX_NPORTS; i++) |
| 292 | __skb_queue_purge(&s->p[s->port].skbq); |
| 293 | } |
| 294 | |
| 295 | /* |
| 296 | * t1_sched_update_parms() is called when the MTU or link speed changes. It |
| 297 | * re-computes scheduler parameters to scope with the change. |
| 298 | */ |
| 299 | unsigned int t1_sched_update_parms(struct sge *sge, unsigned int port, |
| 300 | unsigned int mtu, unsigned int speed) |
| 301 | { |
| 302 | struct sched *s = sge->tx_sched; |
| 303 | struct sched_port *p = &s->p[port]; |
| 304 | unsigned int max_avail_segs; |
| 305 | |
| 306 | pr_debug("t1_sched_update_params mtu=%d speed=%d\n", mtu, speed); |
| 307 | if (speed) |
| 308 | p->speed = speed; |
| 309 | if (mtu) |
| 310 | p->mtu = mtu; |
| 311 | |
| 312 | if (speed || mtu) { |
| 313 | unsigned long long drain = 1024ULL * p->speed * (p->mtu - 40); |
| 314 | do_div(drain, (p->mtu + 50) * 1000); |
| 315 | p->drain_bits_per_1024ns = (unsigned int) drain; |
| 316 | |
| 317 | if (p->speed < 1000) |
| 318 | p->drain_bits_per_1024ns = |
| 319 | 90 * p->drain_bits_per_1024ns / 100; |
| 320 | } |
| 321 | |
| 322 | if (board_info(sge->adapter)->board == CHBT_BOARD_CHT204) { |
| 323 | p->drain_bits_per_1024ns -= 16; |
| 324 | s->max_avail = max(4096U, p->mtu + 16 + 14 + 4); |
| 325 | max_avail_segs = max(1U, 4096 / (p->mtu - 40)); |
| 326 | } else { |
| 327 | s->max_avail = 16384; |
| 328 | max_avail_segs = max(1U, 9000 / (p->mtu - 40)); |
| 329 | } |
| 330 | |
| 331 | pr_debug("t1_sched_update_parms: mtu %u speed %u max_avail %u " |
| 332 | "max_avail_segs %u drain_bits_per_1024ns %u\n", p->mtu, |
| 333 | p->speed, s->max_avail, max_avail_segs, |
| 334 | p->drain_bits_per_1024ns); |
| 335 | |
| 336 | return max_avail_segs * (p->mtu - 40); |
| 337 | } |
| 338 | |
Adrian Bunk | 68d579f | 2007-11-21 15:02:55 -0800 | [diff] [blame] | 339 | #if 0 |
| 340 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 341 | /* |
| 342 | * t1_sched_max_avail_bytes() tells the scheduler the maximum amount of |
| 343 | * data that can be pushed per port. |
| 344 | */ |
| 345 | void t1_sched_set_max_avail_bytes(struct sge *sge, unsigned int val) |
| 346 | { |
| 347 | struct sched *s = sge->tx_sched; |
| 348 | unsigned int i; |
| 349 | |
| 350 | s->max_avail = val; |
| 351 | for (i = 0; i < MAX_NPORTS; i++) |
| 352 | t1_sched_update_parms(sge, i, 0, 0); |
| 353 | } |
| 354 | |
| 355 | /* |
| 356 | * t1_sched_set_drain_bits_per_us() tells the scheduler at which rate a port |
| 357 | * is draining. |
| 358 | */ |
| 359 | void t1_sched_set_drain_bits_per_us(struct sge *sge, unsigned int port, |
| 360 | unsigned int val) |
| 361 | { |
| 362 | struct sched *s = sge->tx_sched; |
| 363 | struct sched_port *p = &s->p[port]; |
| 364 | p->drain_bits_per_1024ns = val * 1024 / 1000; |
| 365 | t1_sched_update_parms(sge, port, 0, 0); |
| 366 | } |
| 367 | |
Adrian Bunk | 68d579f | 2007-11-21 15:02:55 -0800 | [diff] [blame] | 368 | #endif /* 0 */ |
| 369 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 370 | |
| 371 | /* |
| 372 | * get_clock() implements a ns clock (see ktime_get) |
| 373 | */ |
| 374 | static inline ktime_t get_clock(void) |
| 375 | { |
| 376 | struct timespec ts; |
| 377 | |
| 378 | ktime_get_ts(&ts); |
| 379 | return timespec_to_ktime(ts); |
| 380 | } |
| 381 | |
| 382 | /* |
| 383 | * tx_sched_init() allocates resources and does basic initialization. |
| 384 | */ |
| 385 | static int tx_sched_init(struct sge *sge) |
| 386 | { |
| 387 | struct sched *s; |
| 388 | int i; |
| 389 | |
| 390 | s = kzalloc(sizeof (struct sched), GFP_KERNEL); |
| 391 | if (!s) |
| 392 | return -ENOMEM; |
| 393 | |
| 394 | pr_debug("tx_sched_init\n"); |
| 395 | tasklet_init(&s->sched_tsk, restart_sched, (unsigned long) sge); |
| 396 | sge->tx_sched = s; |
| 397 | |
| 398 | for (i = 0; i < MAX_NPORTS; i++) { |
| 399 | skb_queue_head_init(&s->p[i].skbq); |
| 400 | t1_sched_update_parms(sge, i, 1500, 1000); |
| 401 | } |
| 402 | |
| 403 | return 0; |
| 404 | } |
| 405 | |
| 406 | /* |
| 407 | * sched_update_avail() computes the delta since the last time it was called |
| 408 | * and updates the per port quota (number of bits that can be sent to the any |
| 409 | * port). |
| 410 | */ |
| 411 | static inline int sched_update_avail(struct sge *sge) |
| 412 | { |
| 413 | struct sched *s = sge->tx_sched; |
| 414 | ktime_t now = get_clock(); |
| 415 | unsigned int i; |
| 416 | long long delta_time_ns; |
| 417 | |
| 418 | delta_time_ns = ktime_to_ns(ktime_sub(now, s->last_updated)); |
| 419 | |
| 420 | pr_debug("sched_update_avail delta=%lld\n", delta_time_ns); |
| 421 | if (delta_time_ns < 15000) |
| 422 | return 0; |
| 423 | |
| 424 | for (i = 0; i < MAX_NPORTS; i++) { |
| 425 | struct sched_port *p = &s->p[i]; |
| 426 | unsigned int delta_avail; |
| 427 | |
| 428 | delta_avail = (p->drain_bits_per_1024ns * delta_time_ns) >> 13; |
| 429 | p->avail = min(p->avail + delta_avail, s->max_avail); |
| 430 | } |
| 431 | |
| 432 | s->last_updated = now; |
| 433 | |
| 434 | return 1; |
| 435 | } |
| 436 | |
| 437 | /* |
| 438 | * sched_skb() is called from two different places. In the tx path, any |
| 439 | * packet generating load on an output port will call sched_skb() |
| 440 | * (skb != NULL). In addition, sched_skb() is called from the irq/soft irq |
| 441 | * context (skb == NULL). |
| 442 | * The scheduler only returns a skb (which will then be sent) if the |
| 443 | * length of the skb is <= the current quota of the output port. |
| 444 | */ |
| 445 | static struct sk_buff *sched_skb(struct sge *sge, struct sk_buff *skb, |
| 446 | unsigned int credits) |
| 447 | { |
| 448 | struct sched *s = sge->tx_sched; |
| 449 | struct sk_buff_head *skbq; |
| 450 | unsigned int i, len, update = 1; |
| 451 | |
| 452 | pr_debug("sched_skb %p\n", skb); |
| 453 | if (!skb) { |
| 454 | if (!s->num) |
| 455 | return NULL; |
| 456 | } else { |
| 457 | skbq = &s->p[skb->dev->if_port].skbq; |
| 458 | __skb_queue_tail(skbq, skb); |
| 459 | s->num++; |
| 460 | skb = NULL; |
| 461 | } |
| 462 | |
| 463 | if (credits < MAX_SKB_FRAGS + 1) |
| 464 | goto out; |
| 465 | |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 466 | again: |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 467 | for (i = 0; i < MAX_NPORTS; i++) { |
David S. Miller | 18d777a | 2010-04-13 03:07:17 -0700 | [diff] [blame] | 468 | s->port = (s->port + 1) & (MAX_NPORTS - 1); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 469 | skbq = &s->p[s->port].skbq; |
| 470 | |
| 471 | skb = skb_peek(skbq); |
| 472 | |
| 473 | if (!skb) |
| 474 | continue; |
| 475 | |
| 476 | len = skb->len; |
| 477 | if (len <= s->p[s->port].avail) { |
| 478 | s->p[s->port].avail -= len; |
| 479 | s->num--; |
| 480 | __skb_unlink(skb, skbq); |
| 481 | goto out; |
| 482 | } |
| 483 | skb = NULL; |
| 484 | } |
| 485 | |
| 486 | if (update-- && sched_update_avail(sge)) |
| 487 | goto again; |
| 488 | |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 489 | out: |
| 490 | /* 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] | 491 | * again. |
| 492 | */ |
| 493 | if (s->num && !skb) { |
| 494 | struct cmdQ *q = &sge->cmdQ[0]; |
| 495 | clear_bit(CMDQ_STAT_LAST_PKT_DB, &q->status); |
| 496 | if (test_and_set_bit(CMDQ_STAT_RUNNING, &q->status) == 0) { |
| 497 | set_bit(CMDQ_STAT_LAST_PKT_DB, &q->status); |
| 498 | writel(F_CMDQ0_ENABLE, sge->adapter->regs + A_SG_DOORBELL); |
| 499 | } |
| 500 | } |
| 501 | pr_debug("sched_skb ret %p\n", skb); |
| 502 | |
| 503 | return skb; |
| 504 | } |
| 505 | |
| 506 | /* |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 507 | * PIO to indicate that memory mapped Q contains valid descriptor(s). |
| 508 | */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 509 | static inline void doorbell_pio(struct adapter *adapter, u32 val) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 510 | { |
| 511 | wmb(); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 512 | writel(val, adapter->regs + A_SG_DOORBELL); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | /* |
| 516 | * Frees all RX buffers on the freelist Q. The caller must make sure that |
| 517 | * the SGE is turned off before calling this function. |
| 518 | */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 519 | static void free_freelQ_buffers(struct pci_dev *pdev, struct freelQ *q) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 520 | { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 521 | unsigned int cidx = q->cidx; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 522 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 523 | while (q->credits--) { |
| 524 | struct freelQ_ce *ce = &q->centries[cidx]; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 525 | |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 526 | pci_unmap_single(pdev, dma_unmap_addr(ce, dma_addr), |
| 527 | dma_unmap_len(ce, dma_len), |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 528 | PCI_DMA_FROMDEVICE); |
| 529 | dev_kfree_skb(ce->skb); |
| 530 | ce->skb = NULL; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 531 | if (++cidx == q->size) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 532 | cidx = 0; |
| 533 | } |
| 534 | } |
| 535 | |
| 536 | /* |
| 537 | * Free RX free list and response queue resources. |
| 538 | */ |
| 539 | static void free_rx_resources(struct sge *sge) |
| 540 | { |
| 541 | struct pci_dev *pdev = sge->adapter->pdev; |
| 542 | unsigned int size, i; |
| 543 | |
| 544 | if (sge->respQ.entries) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 545 | size = sizeof(struct respQ_e) * sge->respQ.size; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 546 | pci_free_consistent(pdev, size, sge->respQ.entries, |
| 547 | sge->respQ.dma_addr); |
| 548 | } |
| 549 | |
| 550 | for (i = 0; i < SGE_FREELQ_N; i++) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 551 | struct freelQ *q = &sge->freelQ[i]; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 552 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 553 | if (q->centries) { |
| 554 | free_freelQ_buffers(pdev, q); |
| 555 | kfree(q->centries); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 556 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 557 | if (q->entries) { |
| 558 | size = sizeof(struct freelQ_e) * q->size; |
| 559 | pci_free_consistent(pdev, size, q->entries, |
| 560 | q->dma_addr); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 561 | } |
| 562 | } |
| 563 | } |
| 564 | |
| 565 | /* |
| 566 | * Allocates basic RX resources, consisting of memory mapped freelist Qs and a |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 567 | * response queue. |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 568 | */ |
| 569 | static int alloc_rx_resources(struct sge *sge, struct sge_params *p) |
| 570 | { |
| 571 | struct pci_dev *pdev = sge->adapter->pdev; |
| 572 | unsigned int size, i; |
| 573 | |
| 574 | for (i = 0; i < SGE_FREELQ_N; i++) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 575 | struct freelQ *q = &sge->freelQ[i]; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 576 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 577 | q->genbit = 1; |
| 578 | q->size = p->freelQ_size[i]; |
| 579 | q->dma_offset = sge->rx_pkt_pad ? 0 : NET_IP_ALIGN; |
| 580 | size = sizeof(struct freelQ_e) * q->size; |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 581 | q->entries = pci_alloc_consistent(pdev, size, &q->dma_addr); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 582 | if (!q->entries) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 583 | goto err_no_mem; |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 584 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 585 | size = sizeof(struct freelQ_ce) * q->size; |
Stephen Hemminger | cbee9f9 | 2006-11-17 17:01:52 -0800 | [diff] [blame] | 586 | q->centries = kzalloc(size, GFP_KERNEL); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 587 | if (!q->centries) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 588 | goto err_no_mem; |
| 589 | } |
| 590 | |
| 591 | /* |
| 592 | * Calculate the buffer sizes for the two free lists. FL0 accommodates |
| 593 | * regular sized Ethernet frames, FL1 is sized not to exceed 16K, |
| 594 | * including all the sk_buff overhead. |
| 595 | * |
| 596 | * Note: For T2 FL0 and FL1 are reversed. |
| 597 | */ |
| 598 | sge->freelQ[!sge->jumbo_fl].rx_buffer_size = SGE_RX_SM_BUF_SIZE + |
| 599 | sizeof(struct cpl_rx_data) + |
| 600 | sge->freelQ[!sge->jumbo_fl].dma_offset; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 601 | |
| 602 | size = (16 * 1024) - |
| 603 | SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); |
| 604 | |
| 605 | sge->freelQ[sge->jumbo_fl].rx_buffer_size = size; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 606 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 607 | /* |
| 608 | * Setup which skb recycle Q should be used when recycling buffers from |
| 609 | * each free list. |
| 610 | */ |
| 611 | sge->freelQ[!sge->jumbo_fl].recycleq_idx = 0; |
| 612 | sge->freelQ[sge->jumbo_fl].recycleq_idx = 1; |
| 613 | |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 614 | sge->respQ.genbit = 1; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 615 | sge->respQ.size = SGE_RESPQ_E_N; |
| 616 | sge->respQ.credits = 0; |
| 617 | size = sizeof(struct respQ_e) * sge->respQ.size; |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 618 | sge->respQ.entries = |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 619 | pci_alloc_consistent(pdev, size, &sge->respQ.dma_addr); |
| 620 | if (!sge->respQ.entries) |
| 621 | goto err_no_mem; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 622 | return 0; |
| 623 | |
| 624 | err_no_mem: |
| 625 | free_rx_resources(sge); |
| 626 | return -ENOMEM; |
| 627 | } |
| 628 | |
| 629 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 630 | * Reclaims n TX descriptors and frees the buffers associated with them. |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 631 | */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 632 | 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] | 633 | { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 634 | struct cmdQ_ce *ce; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 635 | struct pci_dev *pdev = sge->adapter->pdev; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 636 | unsigned int cidx = q->cidx; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 637 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 638 | q->in_use -= n; |
| 639 | ce = &q->centries[cidx]; |
| 640 | while (n--) { |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 641 | if (likely(dma_unmap_len(ce, dma_len))) { |
| 642 | pci_unmap_single(pdev, dma_unmap_addr(ce, dma_addr), |
| 643 | dma_unmap_len(ce, dma_len), |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 644 | PCI_DMA_TODEVICE); |
| 645 | if (q->sop) |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 646 | q->sop = 0; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 647 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 648 | if (ce->skb) { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 649 | dev_kfree_skb_any(ce->skb); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 650 | q->sop = 1; |
| 651 | } |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 652 | ce++; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 653 | if (++cidx == q->size) { |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 654 | cidx = 0; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 655 | ce = q->centries; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 656 | } |
| 657 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 658 | q->cidx = cidx; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 659 | } |
| 660 | |
| 661 | /* |
| 662 | * Free TX resources. |
| 663 | * |
| 664 | * Assumes that SGE is stopped and all interrupts are disabled. |
| 665 | */ |
| 666 | static void free_tx_resources(struct sge *sge) |
| 667 | { |
| 668 | struct pci_dev *pdev = sge->adapter->pdev; |
| 669 | unsigned int size, i; |
| 670 | |
| 671 | for (i = 0; i < SGE_CMDQ_N; i++) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 672 | struct cmdQ *q = &sge->cmdQ[i]; |
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->centries) { |
| 675 | if (q->in_use) |
| 676 | free_cmdQ_buffers(sge, q, q->in_use); |
| 677 | kfree(q->centries); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 678 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 679 | if (q->entries) { |
| 680 | size = sizeof(struct cmdQ_e) * q->size; |
| 681 | pci_free_consistent(pdev, size, q->entries, |
| 682 | q->dma_addr); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 683 | } |
| 684 | } |
| 685 | } |
| 686 | |
| 687 | /* |
| 688 | * Allocates basic TX resources, consisting of memory mapped command Qs. |
| 689 | */ |
| 690 | static int alloc_tx_resources(struct sge *sge, struct sge_params *p) |
| 691 | { |
| 692 | struct pci_dev *pdev = sge->adapter->pdev; |
| 693 | unsigned int size, i; |
| 694 | |
| 695 | for (i = 0; i < SGE_CMDQ_N; i++) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 696 | struct cmdQ *q = &sge->cmdQ[i]; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 697 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 698 | q->genbit = 1; |
| 699 | q->sop = 1; |
| 700 | q->size = p->cmdQ_size[i]; |
| 701 | q->in_use = 0; |
| 702 | q->status = 0; |
| 703 | q->processed = q->cleaned = 0; |
| 704 | q->stop_thres = 0; |
| 705 | spin_lock_init(&q->lock); |
| 706 | size = sizeof(struct cmdQ_e) * q->size; |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 707 | q->entries = pci_alloc_consistent(pdev, size, &q->dma_addr); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 708 | if (!q->entries) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 709 | goto err_no_mem; |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 710 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 711 | size = sizeof(struct cmdQ_ce) * q->size; |
Stephen Hemminger | cbee9f9 | 2006-11-17 17:01:52 -0800 | [diff] [blame] | 712 | q->centries = kzalloc(size, GFP_KERNEL); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 713 | if (!q->centries) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 714 | goto err_no_mem; |
| 715 | } |
| 716 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 717 | /* |
| 718 | * CommandQ 0 handles Ethernet and TOE packets, while queue 1 is TOE |
| 719 | * only. For queue 0 set the stop threshold so we can handle one more |
| 720 | * packet from each port, plus reserve an additional 24 entries for |
| 721 | * Ethernet packets only. Queue 1 never suspends nor do we reserve |
| 722 | * space for Ethernet packets. |
| 723 | */ |
| 724 | sge->cmdQ[0].stop_thres = sge->adapter->params.nports * |
| 725 | (MAX_SKB_FRAGS + 1); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 726 | return 0; |
| 727 | |
| 728 | err_no_mem: |
| 729 | free_tx_resources(sge); |
| 730 | return -ENOMEM; |
| 731 | } |
| 732 | |
| 733 | static inline void setup_ring_params(struct adapter *adapter, u64 addr, |
| 734 | u32 size, int base_reg_lo, |
| 735 | int base_reg_hi, int size_reg) |
| 736 | { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 737 | writel((u32)addr, adapter->regs + base_reg_lo); |
| 738 | writel(addr >> 32, adapter->regs + base_reg_hi); |
| 739 | writel(size, adapter->regs + size_reg); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 740 | } |
| 741 | |
| 742 | /* |
| 743 | * Enable/disable VLAN acceleration. |
| 744 | */ |
Jiri Pirko | 133b085 | 2011-07-20 04:54:15 +0000 | [diff] [blame] | 745 | void t1_vlan_mode(struct adapter *adapter, u32 features) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 746 | { |
| 747 | struct sge *sge = adapter->sge; |
| 748 | |
Jiri Pirko | 133b085 | 2011-07-20 04:54:15 +0000 | [diff] [blame] | 749 | if (features & NETIF_F_HW_VLAN_RX) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 750 | sge->sge_control |= F_VLAN_XTRACT; |
Jiri Pirko | 133b085 | 2011-07-20 04:54:15 +0000 | [diff] [blame] | 751 | else |
| 752 | sge->sge_control &= ~F_VLAN_XTRACT; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 753 | if (adapter->open_device_map) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 754 | writel(sge->sge_control, adapter->regs + A_SG_CONTROL); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 755 | readl(adapter->regs + A_SG_CONTROL); /* flush */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 756 | } |
| 757 | } |
| 758 | |
| 759 | /* |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 760 | * Programs the various SGE registers. However, the engine is not yet enabled, |
| 761 | * but sge->sge_control is setup and ready to go. |
| 762 | */ |
| 763 | static void configure_sge(struct sge *sge, struct sge_params *p) |
| 764 | { |
| 765 | struct adapter *ap = sge->adapter; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 766 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 767 | writel(0, ap->regs + A_SG_CONTROL); |
| 768 | 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] | 769 | A_SG_CMD0BASELWR, A_SG_CMD0BASEUPR, A_SG_CMD0SIZE); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 770 | 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] | 771 | A_SG_CMD1BASELWR, A_SG_CMD1BASEUPR, A_SG_CMD1SIZE); |
| 772 | setup_ring_params(ap, sge->freelQ[0].dma_addr, |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 773 | sge->freelQ[0].size, A_SG_FL0BASELWR, |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 774 | A_SG_FL0BASEUPR, A_SG_FL0SIZE); |
| 775 | setup_ring_params(ap, sge->freelQ[1].dma_addr, |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 776 | sge->freelQ[1].size, A_SG_FL1BASELWR, |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 777 | A_SG_FL1BASEUPR, A_SG_FL1SIZE); |
| 778 | |
| 779 | /* The threshold comparison uses <. */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 780 | writel(SGE_RX_SM_BUF_SIZE + 1, ap->regs + A_SG_FLTHRESHOLD); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 781 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 782 | setup_ring_params(ap, sge->respQ.dma_addr, sge->respQ.size, |
| 783 | A_SG_RSPBASELWR, A_SG_RSPBASEUPR, A_SG_RSPSIZE); |
| 784 | writel((u32)sge->respQ.size - 1, ap->regs + A_SG_RSPQUEUECREDIT); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 785 | |
| 786 | sge->sge_control = F_CMDQ0_ENABLE | F_CMDQ1_ENABLE | F_FL0_ENABLE | |
| 787 | F_FL1_ENABLE | F_CPL_ENABLE | F_RESPONSE_QUEUE_ENABLE | |
| 788 | V_CMDQ_PRIORITY(2) | F_DISABLE_CMDQ1_GTS | F_ISCSI_COALESCE | |
| 789 | V_RX_PKT_OFFSET(sge->rx_pkt_pad); |
| 790 | |
| 791 | #if defined(__BIG_ENDIAN_BITFIELD) |
| 792 | sge->sge_control |= F_ENABLE_BIG_ENDIAN; |
| 793 | #endif |
| 794 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 795 | /* Initialize no-resource timer */ |
| 796 | sge->intrtimer_nres = SGE_INTRTIMER_NRES * core_ticks_per_usec(ap); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 797 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 798 | t1_sge_set_coalesce_params(sge, p); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 799 | } |
| 800 | |
| 801 | /* |
| 802 | * Return the payload capacity of the jumbo free-list buffers. |
| 803 | */ |
| 804 | static inline unsigned int jumbo_payload_capacity(const struct sge *sge) |
| 805 | { |
| 806 | return sge->freelQ[sge->jumbo_fl].rx_buffer_size - |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 807 | sge->freelQ[sge->jumbo_fl].dma_offset - |
| 808 | sizeof(struct cpl_rx_data); |
| 809 | } |
| 810 | |
| 811 | /* |
| 812 | * Frees all SGE related resources and the sge structure itself |
| 813 | */ |
| 814 | void t1_sge_destroy(struct sge *sge) |
| 815 | { |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 816 | int i; |
| 817 | |
| 818 | for_each_port(sge->adapter, i) |
| 819 | free_percpu(sge->port_stats[i]); |
| 820 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 821 | kfree(sge->tx_sched); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 822 | free_tx_resources(sge); |
| 823 | free_rx_resources(sge); |
| 824 | kfree(sge); |
| 825 | } |
| 826 | |
| 827 | /* |
| 828 | * Allocates new RX buffers on the freelist Q (and tracks them on the freelist |
| 829 | * context Q) until the Q is full or alloc_skb fails. |
| 830 | * |
| 831 | * It is possible that the generation bits already match, indicating that the |
| 832 | * buffer is already valid and nothing needs to be done. This happens when we |
| 833 | * copied a received buffer into a new sk_buff during the interrupt processing. |
| 834 | * |
| 835 | * If the SGE doesn't automatically align packets properly (!sge->rx_pkt_pad), |
| 836 | * we specify a RX_OFFSET in order to make sure that the IP header is 4B |
| 837 | * aligned. |
| 838 | */ |
| 839 | static void refill_free_list(struct sge *sge, struct freelQ *q) |
| 840 | { |
| 841 | struct pci_dev *pdev = sge->adapter->pdev; |
| 842 | struct freelQ_ce *ce = &q->centries[q->pidx]; |
| 843 | struct freelQ_e *e = &q->entries[q->pidx]; |
| 844 | unsigned int dma_len = q->rx_buffer_size - q->dma_offset; |
| 845 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 846 | while (q->credits < q->size) { |
| 847 | struct sk_buff *skb; |
| 848 | dma_addr_t mapping; |
| 849 | |
| 850 | skb = alloc_skb(q->rx_buffer_size, GFP_ATOMIC); |
| 851 | if (!skb) |
| 852 | break; |
| 853 | |
| 854 | skb_reserve(skb, q->dma_offset); |
| 855 | mapping = pci_map_single(pdev, skb->data, dma_len, |
| 856 | PCI_DMA_FROMDEVICE); |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 857 | skb_reserve(skb, sge->rx_pkt_pad); |
| 858 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 859 | ce->skb = skb; |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 860 | dma_unmap_addr_set(ce, dma_addr, mapping); |
| 861 | dma_unmap_len_set(ce, dma_len, dma_len); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 862 | e->addr_lo = (u32)mapping; |
| 863 | e->addr_hi = (u64)mapping >> 32; |
| 864 | e->len_gen = V_CMD_LEN(dma_len) | V_CMD_GEN1(q->genbit); |
| 865 | wmb(); |
| 866 | e->gen2 = V_CMD_GEN2(q->genbit); |
| 867 | |
| 868 | e++; |
| 869 | ce++; |
| 870 | if (++q->pidx == q->size) { |
| 871 | q->pidx = 0; |
| 872 | q->genbit ^= 1; |
| 873 | ce = q->centries; |
| 874 | e = q->entries; |
| 875 | } |
| 876 | q->credits++; |
| 877 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 878 | } |
| 879 | |
| 880 | /* |
| 881 | * Calls refill_free_list for both free lists. If we cannot fill at least 1/4 |
| 882 | * of both rings, we go into 'few interrupt mode' in order to give the system |
| 883 | * time to free up resources. |
| 884 | */ |
| 885 | static void freelQs_empty(struct sge *sge) |
| 886 | { |
| 887 | struct adapter *adapter = sge->adapter; |
| 888 | u32 irq_reg = readl(adapter->regs + A_SG_INT_ENABLE); |
| 889 | u32 irqholdoff_reg; |
| 890 | |
| 891 | refill_free_list(sge, &sge->freelQ[0]); |
| 892 | refill_free_list(sge, &sge->freelQ[1]); |
| 893 | |
| 894 | if (sge->freelQ[0].credits > (sge->freelQ[0].size >> 2) && |
| 895 | sge->freelQ[1].credits > (sge->freelQ[1].size >> 2)) { |
| 896 | irq_reg |= F_FL_EXHAUSTED; |
| 897 | irqholdoff_reg = sge->fixed_intrtimer; |
| 898 | } else { |
| 899 | /* Clear the F_FL_EXHAUSTED interrupts for now */ |
| 900 | irq_reg &= ~F_FL_EXHAUSTED; |
| 901 | irqholdoff_reg = sge->intrtimer_nres; |
| 902 | } |
| 903 | writel(irqholdoff_reg, adapter->regs + A_SG_INTRTIMER); |
| 904 | writel(irq_reg, adapter->regs + A_SG_INT_ENABLE); |
| 905 | |
| 906 | /* We reenable the Qs to force a freelist GTS interrupt later */ |
| 907 | doorbell_pio(adapter, F_FL0_ENABLE | F_FL1_ENABLE); |
| 908 | } |
| 909 | |
| 910 | #define SGE_PL_INTR_MASK (F_PL_INTR_SGE_ERR | F_PL_INTR_SGE_DATA) |
| 911 | #define SGE_INT_FATAL (F_RESPQ_OVERFLOW | F_PACKET_TOO_BIG | F_PACKET_MISMATCH) |
| 912 | #define SGE_INT_ENABLE (F_RESPQ_EXHAUSTED | F_RESPQ_OVERFLOW | \ |
| 913 | F_FL_EXHAUSTED | F_PACKET_TOO_BIG | F_PACKET_MISMATCH) |
| 914 | |
| 915 | /* |
| 916 | * Disable SGE Interrupts |
| 917 | */ |
| 918 | void t1_sge_intr_disable(struct sge *sge) |
| 919 | { |
| 920 | u32 val = readl(sge->adapter->regs + A_PL_ENABLE); |
| 921 | |
| 922 | writel(val & ~SGE_PL_INTR_MASK, sge->adapter->regs + A_PL_ENABLE); |
| 923 | writel(0, sge->adapter->regs + A_SG_INT_ENABLE); |
| 924 | } |
| 925 | |
| 926 | /* |
| 927 | * Enable SGE interrupts. |
| 928 | */ |
| 929 | void t1_sge_intr_enable(struct sge *sge) |
| 930 | { |
| 931 | u32 en = SGE_INT_ENABLE; |
| 932 | u32 val = readl(sge->adapter->regs + A_PL_ENABLE); |
| 933 | |
Michał Mirosław | 30f554f | 2011-04-18 13:31:20 +0000 | [diff] [blame] | 934 | if (sge->adapter->port[0].dev->hw_features & NETIF_F_TSO) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 935 | en &= ~F_PACKET_TOO_BIG; |
| 936 | writel(en, sge->adapter->regs + A_SG_INT_ENABLE); |
| 937 | writel(val | SGE_PL_INTR_MASK, sge->adapter->regs + A_PL_ENABLE); |
| 938 | } |
| 939 | |
| 940 | /* |
| 941 | * Clear SGE interrupts. |
| 942 | */ |
| 943 | void t1_sge_intr_clear(struct sge *sge) |
| 944 | { |
| 945 | writel(SGE_PL_INTR_MASK, sge->adapter->regs + A_PL_CAUSE); |
| 946 | writel(0xffffffff, sge->adapter->regs + A_SG_INT_CAUSE); |
| 947 | } |
| 948 | |
| 949 | /* |
| 950 | * SGE 'Error' interrupt handler |
| 951 | */ |
| 952 | int t1_sge_intr_error_handler(struct sge *sge) |
| 953 | { |
| 954 | struct adapter *adapter = sge->adapter; |
| 955 | u32 cause = readl(adapter->regs + A_SG_INT_CAUSE); |
| 956 | |
Michał Mirosław | 30f554f | 2011-04-18 13:31:20 +0000 | [diff] [blame] | 957 | if (adapter->port[0].dev->hw_features & NETIF_F_TSO) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 958 | cause &= ~F_PACKET_TOO_BIG; |
| 959 | if (cause & F_RESPQ_EXHAUSTED) |
| 960 | sge->stats.respQ_empty++; |
| 961 | if (cause & F_RESPQ_OVERFLOW) { |
| 962 | sge->stats.respQ_overflow++; |
Joe Perches | c1f5121 | 2010-02-22 16:56:57 +0000 | [diff] [blame] | 963 | pr_alert("%s: SGE response queue overflow\n", |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 964 | adapter->name); |
| 965 | } |
| 966 | if (cause & F_FL_EXHAUSTED) { |
| 967 | sge->stats.freelistQ_empty++; |
| 968 | freelQs_empty(sge); |
| 969 | } |
| 970 | if (cause & F_PACKET_TOO_BIG) { |
| 971 | sge->stats.pkt_too_big++; |
Joe Perches | c1f5121 | 2010-02-22 16:56:57 +0000 | [diff] [blame] | 972 | pr_alert("%s: SGE max packet size exceeded\n", |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 973 | adapter->name); |
| 974 | } |
| 975 | if (cause & F_PACKET_MISMATCH) { |
| 976 | sge->stats.pkt_mismatch++; |
Joe Perches | c1f5121 | 2010-02-22 16:56:57 +0000 | [diff] [blame] | 977 | pr_alert("%s: SGE packet mismatch\n", adapter->name); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 978 | } |
| 979 | if (cause & SGE_INT_FATAL) |
| 980 | t1_fatal_err(adapter); |
| 981 | |
| 982 | writel(cause, adapter->regs + A_SG_INT_CAUSE); |
| 983 | return 0; |
| 984 | } |
| 985 | |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 986 | 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] | 987 | { |
| 988 | return &sge->stats; |
| 989 | } |
| 990 | |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 991 | void t1_sge_get_port_stats(const struct sge *sge, int port, |
| 992 | struct sge_port_stats *ss) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 993 | { |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 994 | int cpu; |
| 995 | |
| 996 | memset(ss, 0, sizeof(*ss)); |
| 997 | for_each_possible_cpu(cpu) { |
| 998 | struct sge_port_stats *st = per_cpu_ptr(sge->port_stats[port], cpu); |
| 999 | |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1000 | ss->rx_cso_good += st->rx_cso_good; |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1001 | ss->tx_cso += st->tx_cso; |
| 1002 | ss->tx_tso += st->tx_tso; |
Divy Le Ray | 7832ee0 | 2007-11-27 13:30:09 -0800 | [diff] [blame] | 1003 | ss->tx_need_hdrroom += st->tx_need_hdrroom; |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1004 | ss->vlan_xtract += st->vlan_xtract; |
| 1005 | ss->vlan_insert += st->vlan_insert; |
| 1006 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1007 | } |
| 1008 | |
| 1009 | /** |
| 1010 | * recycle_fl_buf - recycle a free list buffer |
| 1011 | * @fl: the free list |
| 1012 | * @idx: index of buffer to recycle |
| 1013 | * |
| 1014 | * Recycles the specified buffer on the given free list by adding it at |
| 1015 | * the next available slot on the list. |
| 1016 | */ |
| 1017 | static void recycle_fl_buf(struct freelQ *fl, int idx) |
| 1018 | { |
| 1019 | struct freelQ_e *from = &fl->entries[idx]; |
| 1020 | struct freelQ_e *to = &fl->entries[fl->pidx]; |
| 1021 | |
| 1022 | fl->centries[fl->pidx] = fl->centries[idx]; |
| 1023 | to->addr_lo = from->addr_lo; |
| 1024 | to->addr_hi = from->addr_hi; |
| 1025 | to->len_gen = G_CMD_LEN(from->len_gen) | V_CMD_GEN1(fl->genbit); |
| 1026 | wmb(); |
| 1027 | to->gen2 = V_CMD_GEN2(fl->genbit); |
| 1028 | fl->credits++; |
| 1029 | |
| 1030 | if (++fl->pidx == fl->size) { |
| 1031 | fl->pidx = 0; |
| 1032 | fl->genbit ^= 1; |
| 1033 | } |
| 1034 | } |
| 1035 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1036 | static int copybreak __read_mostly = 256; |
| 1037 | module_param(copybreak, int, 0); |
| 1038 | MODULE_PARM_DESC(copybreak, "Receive copy threshold"); |
| 1039 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1040 | /** |
| 1041 | * get_packet - return the next ingress packet buffer |
| 1042 | * @pdev: the PCI device that received the packet |
| 1043 | * @fl: the SGE free list holding the packet |
| 1044 | * @len: the actual packet length, excluding any SGE padding |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1045 | * |
| 1046 | * Get the next packet from a free list and complete setup of the |
| 1047 | * sk_buff. If the packet is small we make a copy and recycle the |
| 1048 | * original buffer, otherwise we use the original buffer itself. If a |
| 1049 | * positive drop threshold is supplied packets are dropped and their |
| 1050 | * buffers recycled if (a) the number of remaining buffers is under the |
| 1051 | * threshold and the packet is too big to copy, or (b) the packet should |
| 1052 | * be copied but there is no memory for the copy. |
| 1053 | */ |
| 1054 | static inline struct sk_buff *get_packet(struct pci_dev *pdev, |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1055 | struct freelQ *fl, unsigned int len) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1056 | { |
| 1057 | struct sk_buff *skb; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1058 | const struct freelQ_ce *ce = &fl->centries[fl->cidx]; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1059 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1060 | if (len < copybreak) { |
| 1061 | skb = alloc_skb(len + 2, GFP_ATOMIC); |
| 1062 | if (!skb) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1063 | goto use_orig_buf; |
| 1064 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1065 | skb_reserve(skb, 2); /* align IP header */ |
| 1066 | skb_put(skb, len); |
| 1067 | pci_dma_sync_single_for_cpu(pdev, |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1068 | dma_unmap_addr(ce, dma_addr), |
| 1069 | dma_unmap_len(ce, dma_len), |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1070 | PCI_DMA_FROMDEVICE); |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 1071 | skb_copy_from_linear_data(ce->skb, skb->data, len); |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1072 | pci_dma_sync_single_for_device(pdev, |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1073 | dma_unmap_addr(ce, dma_addr), |
| 1074 | dma_unmap_len(ce, dma_len), |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1075 | PCI_DMA_FROMDEVICE); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1076 | recycle_fl_buf(fl, fl->cidx); |
| 1077 | return skb; |
| 1078 | } |
| 1079 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1080 | use_orig_buf: |
| 1081 | if (fl->credits < 2) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1082 | recycle_fl_buf(fl, fl->cidx); |
| 1083 | return NULL; |
| 1084 | } |
| 1085 | |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1086 | pci_unmap_single(pdev, dma_unmap_addr(ce, dma_addr), |
| 1087 | dma_unmap_len(ce, dma_len), PCI_DMA_FROMDEVICE); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1088 | skb = ce->skb; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1089 | prefetch(skb->data); |
| 1090 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1091 | skb_put(skb, len); |
| 1092 | return skb; |
| 1093 | } |
| 1094 | |
| 1095 | /** |
| 1096 | * unexpected_offload - handle an unexpected offload packet |
| 1097 | * @adapter: the adapter |
| 1098 | * @fl: the free list that received the packet |
| 1099 | * |
| 1100 | * Called when we receive an unexpected offload packet (e.g., the TOE |
| 1101 | * function is disabled or the card is a NIC). Prints a message and |
| 1102 | * recycles the buffer. |
| 1103 | */ |
| 1104 | static void unexpected_offload(struct adapter *adapter, struct freelQ *fl) |
| 1105 | { |
| 1106 | struct freelQ_ce *ce = &fl->centries[fl->cidx]; |
| 1107 | struct sk_buff *skb = ce->skb; |
| 1108 | |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1109 | pci_dma_sync_single_for_cpu(adapter->pdev, dma_unmap_addr(ce, dma_addr), |
| 1110 | dma_unmap_len(ce, dma_len), PCI_DMA_FROMDEVICE); |
Joe Perches | c1f5121 | 2010-02-22 16:56:57 +0000 | [diff] [blame] | 1111 | pr_err("%s: unexpected offload packet, cmd %u\n", |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1112 | adapter->name, *skb->data); |
| 1113 | recycle_fl_buf(fl, fl->cidx); |
| 1114 | } |
| 1115 | |
| 1116 | /* |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1117 | * T1/T2 SGE limits the maximum DMA size per TX descriptor to |
| 1118 | * SGE_TX_DESC_MAX_PLEN (16KB). If the PAGE_SIZE is larger than 16KB, the |
| 1119 | * stack might send more than SGE_TX_DESC_MAX_PLEN in a contiguous manner. |
| 1120 | * Note that the *_large_page_tx_descs stuff will be optimized out when |
| 1121 | * PAGE_SIZE <= SGE_TX_DESC_MAX_PLEN. |
| 1122 | * |
| 1123 | * compute_large_page_descs() computes how many additional descriptors are |
| 1124 | * required to break down the stack's request. |
| 1125 | */ |
| 1126 | static inline unsigned int compute_large_page_tx_descs(struct sk_buff *skb) |
| 1127 | { |
| 1128 | unsigned int count = 0; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1129 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1130 | if (PAGE_SIZE > SGE_TX_DESC_MAX_PLEN) { |
| 1131 | unsigned int nfrags = skb_shinfo(skb)->nr_frags; |
Eric Dumazet | e743d31 | 2010-04-14 15:59:40 -0700 | [diff] [blame] | 1132 | unsigned int i, len = skb_headlen(skb); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1133 | while (len > SGE_TX_DESC_MAX_PLEN) { |
| 1134 | count++; |
| 1135 | len -= SGE_TX_DESC_MAX_PLEN; |
| 1136 | } |
| 1137 | for (i = 0; nfrags--; i++) { |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame^] | 1138 | const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| 1139 | len = skb_frag_size(frag); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1140 | while (len > SGE_TX_DESC_MAX_PLEN) { |
| 1141 | count++; |
| 1142 | len -= SGE_TX_DESC_MAX_PLEN; |
| 1143 | } |
| 1144 | } |
| 1145 | } |
| 1146 | return count; |
| 1147 | } |
| 1148 | |
| 1149 | /* |
| 1150 | * Write a cmdQ entry. |
| 1151 | * |
| 1152 | * Since this function writes the 'flags' field, it must not be used to |
| 1153 | * write the first cmdQ entry. |
| 1154 | */ |
| 1155 | static inline void write_tx_desc(struct cmdQ_e *e, dma_addr_t mapping, |
| 1156 | unsigned int len, unsigned int gen, |
| 1157 | unsigned int eop) |
| 1158 | { |
Alexander Beregalov | 0ee904c | 2009-04-11 14:50:23 +0000 | [diff] [blame] | 1159 | BUG_ON(len > SGE_TX_DESC_MAX_PLEN); |
| 1160 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1161 | e->addr_lo = (u32)mapping; |
| 1162 | e->addr_hi = (u64)mapping >> 32; |
| 1163 | e->len_gen = V_CMD_LEN(len) | V_CMD_GEN1(gen); |
| 1164 | e->flags = F_CMD_DATAVALID | V_CMD_EOP(eop) | V_CMD_GEN2(gen); |
| 1165 | } |
| 1166 | |
| 1167 | /* |
| 1168 | * See comment for previous function. |
| 1169 | * |
| 1170 | * write_tx_descs_large_page() writes additional SGE tx descriptors if |
| 1171 | * *desc_len exceeds HW's capability. |
| 1172 | */ |
| 1173 | static inline unsigned int write_large_page_tx_descs(unsigned int pidx, |
| 1174 | struct cmdQ_e **e, |
| 1175 | struct cmdQ_ce **ce, |
| 1176 | unsigned int *gen, |
| 1177 | dma_addr_t *desc_mapping, |
| 1178 | unsigned int *desc_len, |
| 1179 | unsigned int nfrags, |
| 1180 | struct cmdQ *q) |
| 1181 | { |
| 1182 | if (PAGE_SIZE > SGE_TX_DESC_MAX_PLEN) { |
| 1183 | struct cmdQ_e *e1 = *e; |
| 1184 | struct cmdQ_ce *ce1 = *ce; |
| 1185 | |
| 1186 | while (*desc_len > SGE_TX_DESC_MAX_PLEN) { |
| 1187 | *desc_len -= SGE_TX_DESC_MAX_PLEN; |
| 1188 | write_tx_desc(e1, *desc_mapping, SGE_TX_DESC_MAX_PLEN, |
| 1189 | *gen, nfrags == 0 && *desc_len == 0); |
| 1190 | ce1->skb = NULL; |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1191 | dma_unmap_len_set(ce1, dma_len, 0); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1192 | *desc_mapping += SGE_TX_DESC_MAX_PLEN; |
| 1193 | if (*desc_len) { |
| 1194 | ce1++; |
| 1195 | e1++; |
| 1196 | if (++pidx == q->size) { |
| 1197 | pidx = 0; |
| 1198 | *gen ^= 1; |
| 1199 | ce1 = q->centries; |
| 1200 | e1 = q->entries; |
| 1201 | } |
| 1202 | } |
| 1203 | } |
| 1204 | *e = e1; |
| 1205 | *ce = ce1; |
| 1206 | } |
| 1207 | return pidx; |
| 1208 | } |
| 1209 | |
| 1210 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1211 | * Write the command descriptors to transmit the given skb starting at |
| 1212 | * descriptor pidx with the given generation. |
| 1213 | */ |
| 1214 | static inline void write_tx_descs(struct adapter *adapter, struct sk_buff *skb, |
| 1215 | unsigned int pidx, unsigned int gen, |
| 1216 | struct cmdQ *q) |
| 1217 | { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1218 | dma_addr_t mapping, desc_mapping; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1219 | struct cmdQ_e *e, *e1; |
| 1220 | struct cmdQ_ce *ce; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1221 | unsigned int i, flags, first_desc_len, desc_len, |
| 1222 | nfrags = skb_shinfo(skb)->nr_frags; |
| 1223 | |
| 1224 | e = e1 = &q->entries[pidx]; |
| 1225 | ce = &q->centries[pidx]; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1226 | |
| 1227 | mapping = pci_map_single(adapter->pdev, skb->data, |
Eric Dumazet | e743d31 | 2010-04-14 15:59:40 -0700 | [diff] [blame] | 1228 | skb_headlen(skb), PCI_DMA_TODEVICE); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1229 | |
| 1230 | desc_mapping = mapping; |
Eric Dumazet | e743d31 | 2010-04-14 15:59:40 -0700 | [diff] [blame] | 1231 | desc_len = skb_headlen(skb); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1232 | |
| 1233 | flags = F_CMD_DATAVALID | F_CMD_SOP | |
| 1234 | V_CMD_EOP(nfrags == 0 && desc_len <= SGE_TX_DESC_MAX_PLEN) | |
| 1235 | V_CMD_GEN2(gen); |
| 1236 | first_desc_len = (desc_len <= SGE_TX_DESC_MAX_PLEN) ? |
| 1237 | desc_len : SGE_TX_DESC_MAX_PLEN; |
| 1238 | e->addr_lo = (u32)desc_mapping; |
| 1239 | e->addr_hi = (u64)desc_mapping >> 32; |
| 1240 | e->len_gen = V_CMD_LEN(first_desc_len) | V_CMD_GEN1(gen); |
| 1241 | ce->skb = NULL; |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1242 | dma_unmap_len_set(ce, dma_len, 0); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1243 | |
| 1244 | if (PAGE_SIZE > SGE_TX_DESC_MAX_PLEN && |
| 1245 | desc_len > SGE_TX_DESC_MAX_PLEN) { |
| 1246 | desc_mapping += first_desc_len; |
| 1247 | desc_len -= first_desc_len; |
| 1248 | e1++; |
| 1249 | ce++; |
| 1250 | if (++pidx == q->size) { |
| 1251 | pidx = 0; |
| 1252 | gen ^= 1; |
| 1253 | e1 = q->entries; |
| 1254 | ce = q->centries; |
| 1255 | } |
| 1256 | pidx = write_large_page_tx_descs(pidx, &e1, &ce, &gen, |
| 1257 | &desc_mapping, &desc_len, |
| 1258 | nfrags, q); |
| 1259 | |
| 1260 | if (likely(desc_len)) |
| 1261 | write_tx_desc(e1, desc_mapping, desc_len, gen, |
| 1262 | nfrags == 0); |
| 1263 | } |
| 1264 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1265 | ce->skb = NULL; |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1266 | dma_unmap_addr_set(ce, dma_addr, mapping); |
Eric Dumazet | e743d31 | 2010-04-14 15:59:40 -0700 | [diff] [blame] | 1267 | dma_unmap_len_set(ce, dma_len, skb_headlen(skb)); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1268 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1269 | for (i = 0; nfrags--; i++) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1270 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1271 | e1++; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1272 | ce++; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1273 | if (++pidx == q->size) { |
| 1274 | pidx = 0; |
| 1275 | gen ^= 1; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1276 | e1 = q->entries; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1277 | ce = q->centries; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1278 | } |
| 1279 | |
Ian Campbell | 01139222 | 2011-10-05 00:28:52 +0000 | [diff] [blame] | 1280 | mapping = skb_frag_dma_map(&adapter->pdev->dev, frag, 0, |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame^] | 1281 | skb_frag_size(frag), DMA_TO_DEVICE); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1282 | desc_mapping = mapping; |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame^] | 1283 | desc_len = skb_frag_size(frag); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1284 | |
| 1285 | pidx = write_large_page_tx_descs(pidx, &e1, &ce, &gen, |
| 1286 | &desc_mapping, &desc_len, |
| 1287 | nfrags, q); |
| 1288 | if (likely(desc_len)) |
| 1289 | write_tx_desc(e1, desc_mapping, desc_len, gen, |
| 1290 | nfrags == 0); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1291 | ce->skb = NULL; |
FUJITA Tomonori | 094f92a | 2010-04-12 14:32:11 +0000 | [diff] [blame] | 1292 | dma_unmap_addr_set(ce, dma_addr, mapping); |
Eric Dumazet | 9e903e0 | 2011-10-18 21:00:24 +0000 | [diff] [blame^] | 1293 | dma_unmap_len_set(ce, dma_len, skb_frag_size(frag)); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1294 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1295 | ce->skb = skb; |
| 1296 | wmb(); |
| 1297 | e->flags = flags; |
| 1298 | } |
| 1299 | |
| 1300 | /* |
| 1301 | * Clean up completed Tx buffers. |
| 1302 | */ |
| 1303 | static inline void reclaim_completed_tx(struct sge *sge, struct cmdQ *q) |
| 1304 | { |
| 1305 | unsigned int reclaim = q->processed - q->cleaned; |
| 1306 | |
| 1307 | if (reclaim) { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1308 | pr_debug("reclaim_completed_tx processed:%d cleaned:%d\n", |
| 1309 | q->processed, q->cleaned); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1310 | free_cmdQ_buffers(sge, q, reclaim); |
| 1311 | q->cleaned += reclaim; |
| 1312 | } |
| 1313 | } |
| 1314 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1315 | /* |
| 1316 | * Called from tasklet. Checks the scheduler for any |
| 1317 | * pending skbs that can be sent. |
| 1318 | */ |
| 1319 | static void restart_sched(unsigned long arg) |
| 1320 | { |
| 1321 | struct sge *sge = (struct sge *) arg; |
| 1322 | struct adapter *adapter = sge->adapter; |
| 1323 | struct cmdQ *q = &sge->cmdQ[0]; |
| 1324 | struct sk_buff *skb; |
| 1325 | unsigned int credits, queued_skb = 0; |
| 1326 | |
| 1327 | spin_lock(&q->lock); |
| 1328 | reclaim_completed_tx(sge, q); |
| 1329 | |
| 1330 | credits = q->size - q->in_use; |
| 1331 | pr_debug("restart_sched credits=%d\n", credits); |
| 1332 | while ((skb = sched_skb(sge, NULL, credits)) != NULL) { |
| 1333 | unsigned int genbit, pidx, count; |
| 1334 | count = 1 + skb_shinfo(skb)->nr_frags; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1335 | count += compute_large_page_tx_descs(skb); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1336 | q->in_use += count; |
| 1337 | genbit = q->genbit; |
| 1338 | pidx = q->pidx; |
| 1339 | q->pidx += count; |
| 1340 | if (q->pidx >= q->size) { |
| 1341 | q->pidx -= q->size; |
| 1342 | q->genbit ^= 1; |
| 1343 | } |
| 1344 | write_tx_descs(adapter, skb, pidx, genbit, q); |
| 1345 | credits = q->size - q->in_use; |
| 1346 | queued_skb = 1; |
| 1347 | } |
| 1348 | |
| 1349 | if (queued_skb) { |
| 1350 | clear_bit(CMDQ_STAT_LAST_PKT_DB, &q->status); |
| 1351 | if (test_and_set_bit(CMDQ_STAT_RUNNING, &q->status) == 0) { |
| 1352 | set_bit(CMDQ_STAT_LAST_PKT_DB, &q->status); |
| 1353 | writel(F_CMDQ0_ENABLE, adapter->regs + A_SG_DOORBELL); |
| 1354 | } |
| 1355 | } |
| 1356 | spin_unlock(&q->lock); |
| 1357 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1358 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1359 | /** |
| 1360 | * sge_rx - process an ingress ethernet packet |
| 1361 | * @sge: the sge structure |
| 1362 | * @fl: the free list that contains the packet buffer |
| 1363 | * @len: the packet length |
| 1364 | * |
| 1365 | * Process an ingress ethernet pakcet and deliver it to the stack. |
| 1366 | */ |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1367 | 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] | 1368 | { |
| 1369 | struct sk_buff *skb; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1370 | const struct cpl_rx_pkt *p; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1371 | struct adapter *adapter = sge->adapter; |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1372 | struct sge_port_stats *st; |
Michał Mirosław | 30f554f | 2011-04-18 13:31:20 +0000 | [diff] [blame] | 1373 | struct net_device *dev; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1374 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1375 | skb = get_packet(adapter->pdev, fl, len - sge->rx_pkt_pad); |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1376 | if (unlikely(!skb)) { |
| 1377 | sge->stats.rx_drops++; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1378 | return; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1379 | } |
| 1380 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1381 | p = (const struct cpl_rx_pkt *) skb->data; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1382 | if (p->iff >= adapter->params.nports) { |
| 1383 | kfree_skb(skb); |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1384 | return; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1385 | } |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1386 | __skb_pull(skb, sizeof(*p)); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1387 | |
Christoph Lameter | ca0c958 | 2009-10-03 19:48:22 +0900 | [diff] [blame] | 1388 | st = this_cpu_ptr(sge->port_stats[p->iff]); |
Michał Mirosław | 30f554f | 2011-04-18 13:31:20 +0000 | [diff] [blame] | 1389 | dev = adapter->port[p->iff].dev; |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1390 | |
Michał Mirosław | 30f554f | 2011-04-18 13:31:20 +0000 | [diff] [blame] | 1391 | skb->protocol = eth_type_trans(skb, dev); |
| 1392 | if ((dev->features & NETIF_F_RXCSUM) && p->csum == 0xffff && |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1393 | skb->protocol == htons(ETH_P_IP) && |
| 1394 | (skb->data[9] == IPPROTO_TCP || skb->data[9] == IPPROTO_UDP)) { |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1395 | ++st->rx_cso_good; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1396 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 1397 | } else |
Eric Dumazet | bc8acf2 | 2010-09-02 13:07:41 -0700 | [diff] [blame] | 1398 | skb_checksum_none_assert(skb); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1399 | |
Jiri Pirko | 133b085 | 2011-07-20 04:54:15 +0000 | [diff] [blame] | 1400 | if (p->vlan_valid) { |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1401 | st->vlan_xtract++; |
Jiri Pirko | 133b085 | 2011-07-20 04:54:15 +0000 | [diff] [blame] | 1402 | __vlan_hwaccel_put_tag(skb, ntohs(p->vlan)); |
| 1403 | } |
| 1404 | netif_receive_skb(skb); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1405 | } |
| 1406 | |
| 1407 | /* |
| 1408 | * Returns true if a command queue has enough available descriptors that |
| 1409 | * we can resume Tx operation after temporarily disabling its packet queue. |
| 1410 | */ |
| 1411 | static inline int enough_free_Tx_descs(const struct cmdQ *q) |
| 1412 | { |
| 1413 | unsigned int r = q->processed - q->cleaned; |
| 1414 | |
| 1415 | return q->in_use - r < (q->size >> 1); |
| 1416 | } |
| 1417 | |
| 1418 | /* |
| 1419 | * Called when sufficient space has become available in the SGE command queues |
| 1420 | * after the Tx packet schedulers have been suspended to restart the Tx path. |
| 1421 | */ |
| 1422 | static void restart_tx_queues(struct sge *sge) |
| 1423 | { |
| 1424 | struct adapter *adap = sge->adapter; |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 1425 | int i; |
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 (!enough_free_Tx_descs(&sge->cmdQ[0])) |
| 1428 | return; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1429 | |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 1430 | for_each_port(adap, i) { |
| 1431 | struct net_device *nd = adap->port[i].dev; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1432 | |
Francois Romieu | 3e0f75b | 2006-12-05 23:57:41 +0100 | [diff] [blame] | 1433 | if (test_and_clear_bit(nd->if_port, &sge->stopped_tx_queues) && |
| 1434 | netif_running(nd)) { |
| 1435 | sge->stats.cmdQ_restarted[2]++; |
| 1436 | netif_wake_queue(nd); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1437 | } |
| 1438 | } |
| 1439 | } |
| 1440 | |
| 1441 | /* |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1442 | * 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] | 1443 | * information. |
| 1444 | */ |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1445 | static unsigned int update_tx_info(struct adapter *adapter, |
| 1446 | unsigned int flags, |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1447 | unsigned int pr0) |
| 1448 | { |
| 1449 | struct sge *sge = adapter->sge; |
| 1450 | struct cmdQ *cmdq = &sge->cmdQ[0]; |
| 1451 | |
| 1452 | cmdq->processed += pr0; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1453 | if (flags & (F_FL0_ENABLE | F_FL1_ENABLE)) { |
| 1454 | freelQs_empty(sge); |
| 1455 | flags &= ~(F_FL0_ENABLE | F_FL1_ENABLE); |
| 1456 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1457 | if (flags & F_CMDQ0_ENABLE) { |
| 1458 | clear_bit(CMDQ_STAT_RUNNING, &cmdq->status); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1459 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1460 | if (cmdq->cleaned + cmdq->in_use != cmdq->processed && |
| 1461 | !test_and_set_bit(CMDQ_STAT_LAST_PKT_DB, &cmdq->status)) { |
| 1462 | set_bit(CMDQ_STAT_RUNNING, &cmdq->status); |
| 1463 | writel(F_CMDQ0_ENABLE, adapter->regs + A_SG_DOORBELL); |
| 1464 | } |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1465 | if (sge->tx_sched) |
| 1466 | tasklet_hi_schedule(&sge->tx_sched->sched_tsk); |
| 1467 | |
| 1468 | flags &= ~F_CMDQ0_ENABLE; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1469 | } |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1470 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1471 | if (unlikely(sge->stopped_tx_queues != 0)) |
| 1472 | restart_tx_queues(sge); |
| 1473 | |
| 1474 | return flags; |
| 1475 | } |
| 1476 | |
| 1477 | /* |
| 1478 | * Process SGE responses, up to the supplied budget. Returns the number of |
| 1479 | * responses processed. A negative budget is effectively unlimited. |
| 1480 | */ |
| 1481 | static int process_responses(struct adapter *adapter, int budget) |
| 1482 | { |
| 1483 | struct sge *sge = adapter->sge; |
| 1484 | struct respQ *q = &sge->respQ; |
| 1485 | struct respQ_e *e = &q->entries[q->cidx]; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1486 | int done = 0; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1487 | unsigned int flags = 0; |
| 1488 | unsigned int cmdq_processed[SGE_CMDQ_N] = {0, 0}; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1489 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1490 | while (done < budget && e->GenerationBit == q->genbit) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1491 | flags |= e->Qsleeping; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1492 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1493 | cmdq_processed[0] += e->Cmdq0CreditReturn; |
| 1494 | cmdq_processed[1] += e->Cmdq1CreditReturn; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1495 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1496 | /* We batch updates to the TX side to avoid cacheline |
| 1497 | * ping-pong of TX state information on MP where the sender |
| 1498 | * might run on a different CPU than this function... |
| 1499 | */ |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1500 | if (unlikely((flags & F_CMDQ0_ENABLE) || cmdq_processed[0] > 64)) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1501 | flags = update_tx_info(adapter, flags, cmdq_processed[0]); |
| 1502 | cmdq_processed[0] = 0; |
| 1503 | } |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1504 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1505 | if (unlikely(cmdq_processed[1] > 16)) { |
| 1506 | sge->cmdQ[1].processed += cmdq_processed[1]; |
| 1507 | cmdq_processed[1] = 0; |
| 1508 | } |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1509 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1510 | if (likely(e->DataValid)) { |
| 1511 | struct freelQ *fl = &sge->freelQ[e->FreelistQid]; |
| 1512 | |
Eric Sesterhenn | 5d9428d | 2006-04-02 13:52:48 +0200 | [diff] [blame] | 1513 | BUG_ON(!e->Sop || !e->Eop); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1514 | if (unlikely(e->Offload)) |
| 1515 | unexpected_offload(adapter, fl); |
| 1516 | else |
| 1517 | sge_rx(sge, fl, e->BufferLength); |
| 1518 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1519 | ++done; |
| 1520 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1521 | /* |
| 1522 | * Note: this depends on each packet consuming a |
| 1523 | * single free-list buffer; cf. the BUG above. |
| 1524 | */ |
| 1525 | if (++fl->cidx == fl->size) |
| 1526 | fl->cidx = 0; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1527 | prefetch(fl->centries[fl->cidx].skb); |
| 1528 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1529 | if (unlikely(--fl->credits < |
| 1530 | fl->size - SGE_FREEL_REFILL_THRESH)) |
| 1531 | refill_free_list(sge, fl); |
| 1532 | } else |
| 1533 | sge->stats.pure_rsps++; |
| 1534 | |
| 1535 | e++; |
| 1536 | if (unlikely(++q->cidx == q->size)) { |
| 1537 | q->cidx = 0; |
| 1538 | q->genbit ^= 1; |
| 1539 | e = q->entries; |
| 1540 | } |
| 1541 | prefetch(e); |
| 1542 | |
| 1543 | if (++q->credits > SGE_RESPQ_REPLENISH_THRES) { |
| 1544 | writel(q->credits, adapter->regs + A_SG_RSPQUEUECREDIT); |
| 1545 | q->credits = 0; |
| 1546 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1547 | } |
| 1548 | |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1549 | flags = update_tx_info(adapter, flags, cmdq_processed[0]); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1550 | sge->cmdQ[1].processed += cmdq_processed[1]; |
| 1551 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1552 | return done; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1553 | } |
| 1554 | |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1555 | static inline int responses_pending(const struct adapter *adapter) |
| 1556 | { |
| 1557 | const struct respQ *Q = &adapter->sge->respQ; |
| 1558 | const struct respQ_e *e = &Q->entries[Q->cidx]; |
| 1559 | |
Eric Dumazet | 807540b | 2010-09-23 05:40:09 +0000 | [diff] [blame] | 1560 | return e->GenerationBit == Q->genbit; |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1561 | } |
| 1562 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1563 | /* |
| 1564 | * A simpler version of process_responses() that handles only pure (i.e., |
| 1565 | * non data-carrying) responses. Such respones are too light-weight to justify |
| 1566 | * calling a softirq when using NAPI, so we handle them specially in hard |
| 1567 | * interrupt context. The function is called with a pointer to a response, |
| 1568 | * which the caller must ensure is a valid pure response. Returns 1 if it |
| 1569 | * encounters a valid data-carrying response, 0 otherwise. |
| 1570 | */ |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1571 | static int process_pure_responses(struct adapter *adapter) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1572 | { |
| 1573 | struct sge *sge = adapter->sge; |
| 1574 | struct respQ *q = &sge->respQ; |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1575 | struct respQ_e *e = &q->entries[q->cidx]; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1576 | const struct freelQ *fl = &sge->freelQ[e->FreelistQid]; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1577 | unsigned int flags = 0; |
| 1578 | unsigned int cmdq_processed[SGE_CMDQ_N] = {0, 0}; |
| 1579 | |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1580 | prefetch(fl->centries[fl->cidx].skb); |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1581 | if (e->DataValid) |
| 1582 | return 1; |
Stephen Hemminger | 24a427c | 2007-01-08 11:26:12 -0800 | [diff] [blame] | 1583 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1584 | do { |
| 1585 | flags |= e->Qsleeping; |
| 1586 | |
| 1587 | cmdq_processed[0] += e->Cmdq0CreditReturn; |
| 1588 | cmdq_processed[1] += e->Cmdq1CreditReturn; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1589 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1590 | e++; |
| 1591 | if (unlikely(++q->cidx == q->size)) { |
| 1592 | q->cidx = 0; |
| 1593 | q->genbit ^= 1; |
| 1594 | e = q->entries; |
| 1595 | } |
| 1596 | prefetch(e); |
| 1597 | |
| 1598 | if (++q->credits > SGE_RESPQ_REPLENISH_THRES) { |
| 1599 | writel(q->credits, adapter->regs + A_SG_RSPQUEUECREDIT); |
| 1600 | q->credits = 0; |
| 1601 | } |
| 1602 | sge->stats.pure_rsps++; |
| 1603 | } while (e->GenerationBit == q->genbit && !e->DataValid); |
| 1604 | |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1605 | flags = update_tx_info(adapter, flags, cmdq_processed[0]); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1606 | sge->cmdQ[1].processed += cmdq_processed[1]; |
| 1607 | |
| 1608 | return e->GenerationBit == q->genbit; |
| 1609 | } |
| 1610 | |
| 1611 | /* |
| 1612 | * Handler for new data events when using NAPI. This does not need any locking |
| 1613 | * or protection from interrupts as data interrupts are off at this point and |
| 1614 | * other adapter interrupts do not interfere. |
| 1615 | */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1616 | int t1_poll(struct napi_struct *napi, int budget) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1617 | { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1618 | struct adapter *adapter = container_of(napi, struct adapter, napi); |
Divy Le Ray | 445cf80 | 2007-11-27 13:30:15 -0800 | [diff] [blame] | 1619 | int work_done = process_responses(adapter, budget); |
Stephen Hemminger | 7fe26a6 | 2006-12-08 11:08:33 -0800 | [diff] [blame] | 1620 | |
Divy Le Ray | 445cf80 | 2007-11-27 13:30:15 -0800 | [diff] [blame] | 1621 | if (likely(work_done < budget)) { |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 1622 | napi_complete(napi); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1623 | writel(adapter->sge->respQ.cidx, |
| 1624 | adapter->regs + A_SG_SLEEPING); |
| 1625 | } |
| 1626 | return work_done; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1627 | } |
| 1628 | |
Stephen Hemminger | 7fe26a6 | 2006-12-08 11:08:33 -0800 | [diff] [blame] | 1629 | irqreturn_t t1_interrupt(int irq, void *data) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1630 | { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1631 | struct adapter *adapter = data; |
| 1632 | struct sge *sge = adapter->sge; |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1633 | int handled; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1634 | |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1635 | if (likely(responses_pending(adapter))) { |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1636 | writel(F_PL_INTR_SGE_DATA, adapter->regs + A_PL_CAUSE); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1637 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1638 | if (napi_schedule_prep(&adapter->napi)) { |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1639 | if (process_pure_responses(adapter)) |
Ben Hutchings | 288379f | 2009-01-19 16:43:59 -0800 | [diff] [blame] | 1640 | __napi_schedule(&adapter->napi); |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1641 | else { |
| 1642 | /* no data, no NAPI needed */ |
| 1643 | writel(sge->respQ.cidx, adapter->regs + A_SG_SLEEPING); |
Francois Romieu | 4422b00 | 2008-07-11 00:29:19 +0200 | [diff] [blame] | 1644 | /* undo schedule_prep */ |
| 1645 | napi_enable(&adapter->napi); |
Stephen Hemminger | 7fe26a6 | 2006-12-08 11:08:33 -0800 | [diff] [blame] | 1646 | } |
Stephen Hemminger | 7fe26a6 | 2006-12-08 11:08:33 -0800 | [diff] [blame] | 1647 | } |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1648 | return IRQ_HANDLED; |
| 1649 | } |
| 1650 | |
| 1651 | spin_lock(&adapter->async_lock); |
| 1652 | handled = t1_slow_intr_handler(adapter); |
| 1653 | spin_unlock(&adapter->async_lock); |
Stephen Hemminger | 7fe26a6 | 2006-12-08 11:08:33 -0800 | [diff] [blame] | 1654 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1655 | if (!handled) |
| 1656 | sge->stats.unhandled_irqs++; |
Stephen Hemminger | 3de00b8 | 2007-01-08 11:26:30 -0800 | [diff] [blame] | 1657 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1658 | return IRQ_RETVAL(handled != 0); |
| 1659 | } |
| 1660 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1661 | /* |
| 1662 | * Enqueues the sk_buff onto the cmdQ[qid] and has hardware fetch it. |
| 1663 | * |
| 1664 | * The code figures out how many entries the sk_buff will require in the |
| 1665 | * cmdQ and updates the cmdQ data structure with the state once the enqueue |
| 1666 | * has complete. Then, it doesn't access the global structure anymore, but |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1667 | * uses the corresponding fields on the stack. In conjunction with a spinlock |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1668 | * around that code, we can make the function reentrant without holding the |
| 1669 | * lock when we actually enqueue (which might be expensive, especially on |
| 1670 | * architectures with IO MMUs). |
| 1671 | * |
| 1672 | * This runs with softirqs disabled. |
| 1673 | */ |
Stephen Hemminger | aa84505 | 2005-12-14 14:38:44 -0800 | [diff] [blame] | 1674 | static int t1_sge_tx(struct sk_buff *skb, struct adapter *adapter, |
| 1675 | unsigned int qid, struct net_device *dev) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1676 | { |
| 1677 | struct sge *sge = adapter->sge; |
| 1678 | struct cmdQ *q = &sge->cmdQ[qid]; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1679 | unsigned int credits, pidx, genbit, count, use_sched_skb = 0; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1680 | |
Stephen Hemminger | cabdfb3 | 2006-12-01 16:36:22 -0800 | [diff] [blame] | 1681 | if (!spin_trylock(&q->lock)) |
| 1682 | return NETDEV_TX_LOCKED; |
| 1683 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1684 | reclaim_completed_tx(sge, q); |
| 1685 | |
| 1686 | pidx = q->pidx; |
| 1687 | credits = q->size - q->in_use; |
| 1688 | count = 1 + skb_shinfo(skb)->nr_frags; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1689 | count += compute_large_page_tx_descs(skb); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1690 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1691 | /* Ethernet packet */ |
| 1692 | if (unlikely(credits < count)) { |
| 1693 | if (!netif_queue_stopped(dev)) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1694 | netif_stop_queue(dev); |
| 1695 | set_bit(dev->if_port, &sge->stopped_tx_queues); |
Scott Bardone | 232a347 | 2006-03-16 19:20:40 -0500 | [diff] [blame] | 1696 | sge->stats.cmdQ_full[2]++; |
Joe Perches | c1f5121 | 2010-02-22 16:56:57 +0000 | [diff] [blame] | 1697 | pr_err("%s: Tx ring full while queue awake!\n", |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1698 | adapter->name); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1699 | } |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1700 | spin_unlock(&q->lock); |
| 1701 | return NETDEV_TX_BUSY; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1702 | } |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1703 | |
| 1704 | if (unlikely(credits - count < q->stop_thres)) { |
| 1705 | netif_stop_queue(dev); |
| 1706 | set_bit(dev->if_port, &sge->stopped_tx_queues); |
| 1707 | sge->stats.cmdQ_full[2]++; |
| 1708 | } |
| 1709 | |
| 1710 | /* T204 cmdQ0 skbs that are destined for a certain port have to go |
| 1711 | * through the scheduler. |
| 1712 | */ |
| 1713 | if (sge->tx_sched && !qid && skb->dev) { |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1714 | use_sched: |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1715 | use_sched_skb = 1; |
| 1716 | /* Note that the scheduler might return a different skb than |
| 1717 | * the one passed in. |
| 1718 | */ |
| 1719 | skb = sched_skb(sge, skb, credits); |
| 1720 | if (!skb) { |
| 1721 | spin_unlock(&q->lock); |
| 1722 | return NETDEV_TX_OK; |
| 1723 | } |
| 1724 | pidx = q->pidx; |
| 1725 | count = 1 + skb_shinfo(skb)->nr_frags; |
| 1726 | count += compute_large_page_tx_descs(skb); |
| 1727 | } |
| 1728 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1729 | q->in_use += count; |
| 1730 | genbit = q->genbit; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1731 | pidx = q->pidx; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1732 | q->pidx += count; |
| 1733 | if (q->pidx >= q->size) { |
| 1734 | q->pidx -= q->size; |
| 1735 | q->genbit ^= 1; |
| 1736 | } |
| 1737 | spin_unlock(&q->lock); |
| 1738 | |
| 1739 | write_tx_descs(adapter, skb, pidx, genbit, q); |
| 1740 | |
| 1741 | /* |
| 1742 | * We always ring the doorbell for cmdQ1. For cmdQ0, we only ring |
| 1743 | * the doorbell if the Q is asleep. There is a natural race, where |
| 1744 | * the hardware is going to sleep just after we checked, however, |
| 1745 | * then the interrupt handler will detect the outstanding TX packet |
| 1746 | * and ring the doorbell for us. |
| 1747 | */ |
| 1748 | if (qid) |
| 1749 | doorbell_pio(adapter, F_CMDQ1_ENABLE); |
| 1750 | else { |
| 1751 | clear_bit(CMDQ_STAT_LAST_PKT_DB, &q->status); |
| 1752 | if (test_and_set_bit(CMDQ_STAT_RUNNING, &q->status) == 0) { |
| 1753 | set_bit(CMDQ_STAT_LAST_PKT_DB, &q->status); |
| 1754 | writel(F_CMDQ0_ENABLE, adapter->regs + A_SG_DOORBELL); |
| 1755 | } |
| 1756 | } |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1757 | |
| 1758 | if (use_sched_skb) { |
| 1759 | if (spin_trylock(&q->lock)) { |
| 1760 | credits = q->size - q->in_use; |
| 1761 | skb = NULL; |
| 1762 | goto use_sched; |
| 1763 | } |
| 1764 | } |
Stephen Hemminger | aa84505 | 2005-12-14 14:38:44 -0800 | [diff] [blame] | 1765 | return NETDEV_TX_OK; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1766 | } |
| 1767 | |
| 1768 | #define MK_ETH_TYPE_MSS(type, mss) (((mss) & 0x3FFF) | ((type) << 14)) |
| 1769 | |
| 1770 | /* |
| 1771 | * eth_hdr_len - return the length of an Ethernet header |
| 1772 | * @data: pointer to the start of the Ethernet header |
| 1773 | * |
| 1774 | * Returns the length of an Ethernet header, including optional VLAN tag. |
| 1775 | */ |
| 1776 | static inline int eth_hdr_len(const void *data) |
| 1777 | { |
| 1778 | const struct ethhdr *e = data; |
| 1779 | |
| 1780 | return e->h_proto == htons(ETH_P_8021Q) ? VLAN_ETH_HLEN : ETH_HLEN; |
| 1781 | } |
| 1782 | |
| 1783 | /* |
| 1784 | * Adds the CPL header to the sk_buff and passes it to t1_sge_tx. |
| 1785 | */ |
Stephen Hemminger | 61357325 | 2009-08-31 19:50:58 +0000 | [diff] [blame] | 1786 | 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] | 1787 | { |
Wang Chen | c3ccc12 | 2008-11-16 23:06:39 -0800 | [diff] [blame] | 1788 | struct adapter *adapter = dev->ml_priv; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1789 | struct sge *sge = adapter->sge; |
Christoph Lameter | ca0c958 | 2009-10-03 19:48:22 +0900 | [diff] [blame] | 1790 | 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] | 1791 | struct cpl_tx_pkt *cpl; |
Stephen Hemminger | cabdfb3 | 2006-12-01 16:36:22 -0800 | [diff] [blame] | 1792 | struct sk_buff *orig_skb = skb; |
| 1793 | int ret; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1794 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1795 | if (skb->protocol == htons(ETH_P_CPL5)) |
| 1796 | goto send; |
| 1797 | |
Divy Le Ray | 7832ee0 | 2007-11-27 13:30:09 -0800 | [diff] [blame] | 1798 | /* |
| 1799 | * We are using a non-standard hard_header_len. |
| 1800 | * Allocate more header room in the rare cases it is not big enough. |
| 1801 | */ |
| 1802 | if (unlikely(skb_headroom(skb) < dev->hard_header_len - ETH_HLEN)) { |
| 1803 | skb = skb_realloc_headroom(skb, sizeof(struct cpl_tx_pkt_lso)); |
| 1804 | ++st->tx_need_hdrroom; |
| 1805 | dev_kfree_skb_any(orig_skb); |
| 1806 | if (!skb) |
| 1807 | return NETDEV_TX_OK; |
| 1808 | } |
| 1809 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1810 | if (skb_shinfo(skb)->gso_size) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1811 | int eth_type; |
| 1812 | struct cpl_tx_pkt_lso *hdr; |
| 1813 | |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 1814 | ++st->tx_tso; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1815 | |
Arnaldo Carvalho de Melo | bbe735e | 2007-03-10 22:16:10 -0300 | [diff] [blame] | 1816 | eth_type = skb_network_offset(skb) == ETH_HLEN ? |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1817 | CPL_ETH_II : CPL_ETH_II_VLAN; |
| 1818 | |
| 1819 | hdr = (struct cpl_tx_pkt_lso *)skb_push(skb, sizeof(*hdr)); |
| 1820 | hdr->opcode = CPL_TX_PKT_LSO; |
| 1821 | hdr->ip_csum_dis = hdr->l4_csum_dis = 0; |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1822 | hdr->ip_hdr_words = ip_hdr(skb)->ihl; |
Arnaldo Carvalho de Melo | aa8223c | 2007-04-10 21:04:22 -0700 | [diff] [blame] | 1823 | hdr->tcp_hdr_words = tcp_hdr(skb)->doff; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1824 | hdr->eth_type_mss = htons(MK_ETH_TYPE_MSS(eth_type, |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1825 | skb_shinfo(skb)->gso_size)); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1826 | hdr->len = htonl(skb->len - sizeof(*hdr)); |
| 1827 | cpl = (struct cpl_tx_pkt *)hdr; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1828 | } else { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1829 | /* |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1830 | * Packets shorter than ETH_HLEN can break the MAC, drop them |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1831 | * early. Also, we may get oversized packets because some |
| 1832 | * parts of the kernel don't handle our unusual hard_header_len |
| 1833 | * right, drop those too. |
| 1834 | */ |
| 1835 | if (unlikely(skb->len < ETH_HLEN || |
| 1836 | skb->len > dev->mtu + eth_hdr_len(skb->data))) { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1837 | pr_debug("%s: packet size %d hdr %d mtu%d\n", dev->name, |
| 1838 | skb->len, eth_hdr_len(skb->data), dev->mtu); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1839 | dev_kfree_skb_any(skb); |
Stephen Hemminger | aa84505 | 2005-12-14 14:38:44 -0800 | [diff] [blame] | 1840 | return NETDEV_TX_OK; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1841 | } |
| 1842 | |
Michał Mirosław | 30f554f | 2011-04-18 13:31:20 +0000 | [diff] [blame] | 1843 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1844 | ip_hdr(skb)->protocol == IPPROTO_UDP) { |
Patrick McHardy | 84fa793 | 2006-08-29 16:44:56 -0700 | [diff] [blame] | 1845 | if (unlikely(skb_checksum_help(skb))) { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1846 | pr_debug("%s: unable to do udp checksum\n", dev->name); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1847 | dev_kfree_skb_any(skb); |
Stephen Hemminger | aa84505 | 2005-12-14 14:38:44 -0800 | [diff] [blame] | 1848 | return NETDEV_TX_OK; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1849 | } |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1850 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1851 | |
| 1852 | /* Hmmm, assuming to catch the gratious arp... and we'll use |
| 1853 | * it to flush out stuck espi packets... |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1854 | */ |
| 1855 | if ((unlikely(!adapter->sge->espibug_skb[dev->if_port]))) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1856 | if (skb->protocol == htons(ETH_P_ARP) && |
Arnaldo Carvalho de Melo | d0a92be | 2007-03-12 20:56:31 -0300 | [diff] [blame] | 1857 | arp_hdr(skb)->ar_op == htons(ARPOP_REQUEST)) { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1858 | adapter->sge->espibug_skb[dev->if_port] = skb; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1859 | /* We want to re-use this skb later. We |
| 1860 | * simply bump the reference count and it |
| 1861 | * will not be freed... |
| 1862 | */ |
| 1863 | skb = skb_get(skb); |
| 1864 | } |
| 1865 | } |
| 1866 | |
| 1867 | cpl = (struct cpl_tx_pkt *)__skb_push(skb, sizeof(*cpl)); |
| 1868 | cpl->opcode = CPL_TX_PKT; |
| 1869 | cpl->ip_csum_dis = 1; /* SW calculates IP csum */ |
Patrick McHardy | 84fa793 | 2006-08-29 16:44:56 -0700 | [diff] [blame] | 1870 | cpl->l4_csum_dis = skb->ip_summed == CHECKSUM_PARTIAL ? 0 : 1; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1871 | /* the length field isn't used so don't bother setting it */ |
| 1872 | |
Patrick McHardy | 84fa793 | 2006-08-29 16:44:56 -0700 | [diff] [blame] | 1873 | st->tx_cso += (skb->ip_summed == CHECKSUM_PARTIAL); |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1874 | } |
| 1875 | cpl->iff = dev->if_port; |
| 1876 | |
Jesse Gross | eab6d18 | 2010-10-20 13:56:03 +0000 | [diff] [blame] | 1877 | if (vlan_tx_tag_present(skb)) { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1878 | cpl->vlan_valid = 1; |
| 1879 | cpl->vlan = htons(vlan_tx_tag_get(skb)); |
| 1880 | st->vlan_insert++; |
| 1881 | } else |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1882 | cpl->vlan_valid = 0; |
| 1883 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1884 | send: |
Stephen Hemminger | cabdfb3 | 2006-12-01 16:36:22 -0800 | [diff] [blame] | 1885 | ret = t1_sge_tx(skb, adapter, 0, dev); |
| 1886 | |
| 1887 | /* If transmit busy, and we reallocated skb's due to headroom limit, |
| 1888 | * then silently discard to avoid leak. |
| 1889 | */ |
| 1890 | if (unlikely(ret != NETDEV_TX_OK && skb != orig_skb)) { |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1891 | dev_kfree_skb_any(skb); |
Stephen Hemminger | cabdfb3 | 2006-12-01 16:36:22 -0800 | [diff] [blame] | 1892 | ret = NETDEV_TX_OK; |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 1893 | } |
Stephen Hemminger | cabdfb3 | 2006-12-01 16:36:22 -0800 | [diff] [blame] | 1894 | return ret; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1895 | } |
| 1896 | |
| 1897 | /* |
| 1898 | * Callback for the Tx buffer reclaim timer. Runs with softirqs disabled. |
| 1899 | */ |
| 1900 | static void sge_tx_reclaim_cb(unsigned long data) |
| 1901 | { |
| 1902 | int i; |
| 1903 | struct sge *sge = (struct sge *)data; |
| 1904 | |
| 1905 | for (i = 0; i < SGE_CMDQ_N; ++i) { |
| 1906 | struct cmdQ *q = &sge->cmdQ[i]; |
| 1907 | |
| 1908 | if (!spin_trylock(&q->lock)) |
| 1909 | continue; |
| 1910 | |
| 1911 | reclaim_completed_tx(sge, q); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1912 | if (i == 0 && q->in_use) { /* flush pending credits */ |
| 1913 | writel(F_CMDQ0_ENABLE, sge->adapter->regs + A_SG_DOORBELL); |
| 1914 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1915 | spin_unlock(&q->lock); |
| 1916 | } |
| 1917 | mod_timer(&sge->tx_reclaim_timer, jiffies + TX_RECLAIM_PERIOD); |
| 1918 | } |
| 1919 | |
| 1920 | /* |
| 1921 | * Propagate changes of the SGE coalescing parameters to the HW. |
| 1922 | */ |
| 1923 | int t1_sge_set_coalesce_params(struct sge *sge, struct sge_params *p) |
| 1924 | { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1925 | sge->fixed_intrtimer = p->rx_coalesce_usecs * |
| 1926 | core_ticks_per_usec(sge->adapter); |
| 1927 | writel(sge->fixed_intrtimer, sge->adapter->regs + A_SG_INTRTIMER); |
| 1928 | return 0; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1929 | } |
| 1930 | |
| 1931 | /* |
| 1932 | * Allocates both RX and TX resources and configures the SGE. However, |
| 1933 | * the hardware is not enabled yet. |
| 1934 | */ |
| 1935 | int t1_sge_configure(struct sge *sge, struct sge_params *p) |
| 1936 | { |
| 1937 | if (alloc_rx_resources(sge, p)) |
| 1938 | return -ENOMEM; |
| 1939 | if (alloc_tx_resources(sge, p)) { |
| 1940 | free_rx_resources(sge); |
| 1941 | return -ENOMEM; |
| 1942 | } |
| 1943 | configure_sge(sge, p); |
| 1944 | |
| 1945 | /* |
| 1946 | * Now that we have sized the free lists calculate the payload |
| 1947 | * capacity of the large buffers. Other parts of the driver use |
| 1948 | * this to set the max offload coalescing size so that RX packets |
| 1949 | * do not overflow our large buffers. |
| 1950 | */ |
| 1951 | p->large_buf_capacity = jumbo_payload_capacity(sge); |
| 1952 | return 0; |
| 1953 | } |
| 1954 | |
| 1955 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1956 | * Disables the DMA engine. |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1957 | */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1958 | void t1_sge_stop(struct sge *sge) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1959 | { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1960 | int i; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1961 | writel(0, sge->adapter->regs + A_SG_CONTROL); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1962 | readl(sge->adapter->regs + A_SG_CONTROL); /* flush */ |
| 1963 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1964 | if (is_T2(sge->adapter)) |
| 1965 | del_timer_sync(&sge->espibug_timer); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1966 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1967 | del_timer_sync(&sge->tx_reclaim_timer); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1968 | if (sge->tx_sched) |
| 1969 | tx_sched_stop(sge); |
| 1970 | |
| 1971 | for (i = 0; i < MAX_NPORTS; i++) |
Wei Yongjun | f4fe5a9 | 2009-02-25 00:45:09 +0000 | [diff] [blame] | 1972 | kfree_skb(sge->espibug_skb[i]); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1973 | } |
| 1974 | |
| 1975 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1976 | * Enables the DMA engine. |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1977 | */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1978 | void t1_sge_start(struct sge *sge) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1979 | { |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1980 | refill_free_list(sge, &sge->freelQ[0]); |
| 1981 | refill_free_list(sge, &sge->freelQ[1]); |
| 1982 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1983 | writel(sge->sge_control, sge->adapter->regs + A_SG_CONTROL); |
| 1984 | doorbell_pio(sge->adapter, F_FL0_ENABLE | F_FL1_ENABLE); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1985 | readl(sge->adapter->regs + A_SG_CONTROL); /* flush */ |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1986 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1987 | mod_timer(&sge->tx_reclaim_timer, jiffies + TX_RECLAIM_PERIOD); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1988 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1989 | if (is_T2(sge->adapter)) |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1990 | mod_timer(&sge->espibug_timer, jiffies + sge->espibug_timeout); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1991 | } |
| 1992 | |
| 1993 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 1994 | * Callback for the T2 ESPI 'stuck packet feature' workaorund |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 1995 | */ |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 1996 | static void espibug_workaround_t204(unsigned long data) |
| 1997 | { |
| 1998 | struct adapter *adapter = (struct adapter *)data; |
| 1999 | struct sge *sge = adapter->sge; |
| 2000 | unsigned int nports = adapter->params.nports; |
| 2001 | u32 seop[MAX_NPORTS]; |
| 2002 | |
| 2003 | if (adapter->open_device_map & PORT_MASK) { |
| 2004 | int i; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2005 | |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 2006 | if (t1_espi_get_mon_t204(adapter, &(seop[0]), 0) < 0) |
| 2007 | return; |
| 2008 | |
| 2009 | for (i = 0; i < nports; i++) { |
| 2010 | struct sk_buff *skb = sge->espibug_skb[i]; |
| 2011 | |
| 2012 | if (!netif_running(adapter->port[i].dev) || |
| 2013 | netif_queue_stopped(adapter->port[i].dev) || |
| 2014 | !seop[i] || ((seop[i] & 0xfff) != 0) || !skb) |
| 2015 | continue; |
| 2016 | |
| 2017 | if (!skb->cb[0]) { |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 2018 | skb_copy_to_linear_data_offset(skb, |
| 2019 | sizeof(struct cpl_tx_pkt), |
| 2020 | ch_mac_addr, |
| 2021 | ETH_ALEN); |
| 2022 | skb_copy_to_linear_data_offset(skb, |
| 2023 | skb->len - 10, |
| 2024 | ch_mac_addr, |
| 2025 | ETH_ALEN); |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 2026 | skb->cb[0] = 0xff; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2027 | } |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 2028 | |
| 2029 | /* bump the reference count to avoid freeing of |
| 2030 | * the skb once the DMA has completed. |
| 2031 | */ |
| 2032 | skb = skb_get(skb); |
| 2033 | t1_sge_tx(skb, adapter, 0, adapter->port[i].dev); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2034 | } |
| 2035 | } |
| 2036 | mod_timer(&sge->espibug_timer, jiffies + sge->espibug_timeout); |
| 2037 | } |
| 2038 | |
| 2039 | static void espibug_workaround(unsigned long data) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2040 | { |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2041 | struct adapter *adapter = (struct adapter *)data; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2042 | struct sge *sge = adapter->sge; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2043 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2044 | if (netif_running(adapter->port[0].dev)) { |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2045 | struct sk_buff *skb = sge->espibug_skb[0]; |
| 2046 | u32 seop = t1_espi_get_mon(adapter, 0x930, 0); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2047 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2048 | if ((seop & 0xfff0fff) == 0xfff && skb) { |
| 2049 | if (!skb->cb[0]) { |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 2050 | skb_copy_to_linear_data_offset(skb, |
| 2051 | sizeof(struct cpl_tx_pkt), |
| 2052 | ch_mac_addr, |
| 2053 | ETH_ALEN); |
| 2054 | skb_copy_to_linear_data_offset(skb, |
| 2055 | skb->len - 10, |
| 2056 | ch_mac_addr, |
| 2057 | ETH_ALEN); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2058 | skb->cb[0] = 0xff; |
| 2059 | } |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2060 | |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2061 | /* bump the reference count to avoid freeing of the |
| 2062 | * skb once the DMA has completed. |
| 2063 | */ |
| 2064 | skb = skb_get(skb); |
| 2065 | t1_sge_tx(skb, adapter, 0, adapter->port[0].dev); |
| 2066 | } |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2067 | } |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2068 | mod_timer(&sge->espibug_timer, jiffies + sge->espibug_timeout); |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2069 | } |
| 2070 | |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2071 | /* |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2072 | * Creates a t1_sge structure and returns suggested resource parameters. |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2073 | */ |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2074 | struct sge * __devinit t1_sge_create(struct adapter *adapter, |
| 2075 | struct sge_params *p) |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2076 | { |
Stephen Hemminger | cbee9f9 | 2006-11-17 17:01:52 -0800 | [diff] [blame] | 2077 | struct sge *sge = kzalloc(sizeof(*sge), GFP_KERNEL); |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 2078 | int i; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2079 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2080 | if (!sge) |
| 2081 | return NULL; |
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 | sge->adapter = adapter; |
| 2084 | sge->netdev = adapter->port[0].dev; |
| 2085 | sge->rx_pkt_pad = t1_is_T1B(adapter) ? 0 : 2; |
| 2086 | sge->jumbo_fl = t1_is_T1B(adapter) ? 1 : 0; |
| 2087 | |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 2088 | for_each_port(adapter, i) { |
| 2089 | sge->port_stats[i] = alloc_percpu(struct sge_port_stats); |
| 2090 | if (!sge->port_stats[i]) |
| 2091 | goto nomem_port; |
| 2092 | } |
| 2093 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2094 | init_timer(&sge->tx_reclaim_timer); |
| 2095 | sge->tx_reclaim_timer.data = (unsigned long)sge; |
| 2096 | sge->tx_reclaim_timer.function = sge_tx_reclaim_cb; |
| 2097 | |
| 2098 | if (is_T2(sge->adapter)) { |
| 2099 | init_timer(&sge->espibug_timer); |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2100 | |
| 2101 | if (adapter->params.nports > 1) { |
| 2102 | tx_sched_init(sge); |
| 2103 | sge->espibug_timer.function = espibug_workaround_t204; |
Francois Romieu | d748742 | 2006-12-11 23:49:13 +0100 | [diff] [blame] | 2104 | } else |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2105 | sge->espibug_timer.function = espibug_workaround; |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2106 | sge->espibug_timer.data = (unsigned long)sge->adapter; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2107 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2108 | sge->espibug_timeout = 1; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2109 | /* for T204, every 10ms */ |
| 2110 | if (adapter->params.nports > 1) |
| 2111 | sge->espibug_timeout = HZ/100; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2112 | } |
Francois Romieu | 356bd14 | 2006-12-11 23:47:00 +0100 | [diff] [blame] | 2113 | |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2114 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2115 | p->cmdQ_size[0] = SGE_CMDQ0_E_N; |
| 2116 | p->cmdQ_size[1] = SGE_CMDQ1_E_N; |
| 2117 | p->freelQ_size[!sge->jumbo_fl] = SGE_FREEL_SIZE; |
| 2118 | p->freelQ_size[sge->jumbo_fl] = SGE_JUMBO_FREEL_SIZE; |
Stephen Hemminger | f1d3d38 | 2006-12-01 16:36:16 -0800 | [diff] [blame] | 2119 | if (sge->tx_sched) { |
| 2120 | if (board_info(sge->adapter)->board == CHBT_BOARD_CHT204) |
| 2121 | p->rx_coalesce_usecs = 15; |
| 2122 | else |
| 2123 | p->rx_coalesce_usecs = 50; |
| 2124 | } else |
| 2125 | p->rx_coalesce_usecs = 50; |
| 2126 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2127 | p->coalesce_enable = 0; |
| 2128 | p->sample_interval_usecs = 0; |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2129 | |
Scott Bardone | 559fb51 | 2005-06-23 01:40:19 -0400 | [diff] [blame] | 2130 | return sge; |
Stephen Hemminger | 56f643c | 2006-12-01 16:36:21 -0800 | [diff] [blame] | 2131 | nomem_port: |
| 2132 | while (i >= 0) { |
| 2133 | free_percpu(sge->port_stats[i]); |
| 2134 | --i; |
| 2135 | } |
| 2136 | kfree(sge); |
| 2137 | return NULL; |
| 2138 | |
Christoph Lameter | 8199d3a | 2005-03-30 13:34:31 -0800 | [diff] [blame] | 2139 | } |