Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 1 | /* |
John Gregor | 87427da | 2007-06-11 10:21:14 -0700 | [diff] [blame] | 2 | * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved. |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 3 | * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved. |
| 4 | * |
| 5 | * This software is available to you under a choice of one of two |
| 6 | * licenses. You may choose to be licensed under the terms of the GNU |
| 7 | * General Public License (GPL) Version 2, available from the file |
| 8 | * COPYING in the main directory of this source tree, or the |
| 9 | * OpenIB.org BSD license below: |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or |
| 12 | * without modification, are permitted provided that the following |
| 13 | * conditions are met: |
| 14 | * |
| 15 | * - Redistributions of source code must retain the above |
| 16 | * copyright notice, this list of conditions and the following |
| 17 | * disclaimer. |
| 18 | * |
| 19 | * - Redistributions in binary form must reproduce the above |
| 20 | * copyright notice, this list of conditions and the following |
| 21 | * disclaimer in the documentation and/or other materials |
| 22 | * provided with the distribution. |
| 23 | * |
| 24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 31 | * SOFTWARE. |
| 32 | */ |
| 33 | |
| 34 | #include <linux/pci.h> |
| 35 | #include <linux/netdevice.h> |
| 36 | #include <linux/vmalloc.h> |
| 37 | |
| 38 | #include "ipath_kernel.h" |
Bryan O'Sullivan | 27b678d | 2006-07-01 04:36:17 -0700 | [diff] [blame] | 39 | #include "ipath_common.h" |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 40 | |
| 41 | /* |
| 42 | * min buffers we want to have per port, after driver |
| 43 | */ |
| 44 | #define IPATH_MIN_USER_PORT_BUFCNT 8 |
| 45 | |
| 46 | /* |
| 47 | * Number of ports we are configured to use (to allow for more pio |
| 48 | * buffers per port, etc.) Zero means use chip value. |
| 49 | */ |
| 50 | static ushort ipath_cfgports; |
| 51 | |
| 52 | module_param_named(cfgports, ipath_cfgports, ushort, S_IRUGO); |
| 53 | MODULE_PARM_DESC(cfgports, "Set max number of ports to use"); |
| 54 | |
| 55 | /* |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 56 | * Number of buffers reserved for driver (verbs and layered drivers.) |
| 57 | * Reserved at end of buffer list. Initialized based on |
Bryan O'Sullivan | 52e7fad | 2006-04-24 14:23:00 -0700 | [diff] [blame] | 58 | * number of PIO buffers if not set via module interface. |
| 59 | * The problem with this is that it's global, but we'll use different |
| 60 | * numbers for different chip types. So the default value is not |
| 61 | * very useful. I've redefined it for the 1.3 release so that it's |
| 62 | * zero unless set by the user to something else, in which case we |
| 63 | * try to respect it. |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 64 | */ |
Bryan O'Sullivan | 52e7fad | 2006-04-24 14:23:00 -0700 | [diff] [blame] | 65 | static ushort ipath_kpiobufs; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 66 | |
| 67 | static int ipath_set_kpiobufs(const char *val, struct kernel_param *kp); |
| 68 | |
Bryan O'Sullivan | 52e7fad | 2006-04-24 14:23:00 -0700 | [diff] [blame] | 69 | module_param_call(kpiobufs, ipath_set_kpiobufs, param_get_ushort, |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 70 | &ipath_kpiobufs, S_IWUSR | S_IRUGO); |
| 71 | MODULE_PARM_DESC(kpiobufs, "Set number of PIO buffers for driver"); |
| 72 | |
| 73 | /** |
| 74 | * create_port0_egr - allocate the eager TID buffers |
| 75 | * @dd: the infinipath device |
| 76 | * |
| 77 | * This code is now quite different for user and kernel, because |
| 78 | * the kernel uses skb's, for the accelerated network performance. |
| 79 | * This is the kernel (port0) version. |
| 80 | * |
| 81 | * Allocate the eager TID buffers and program them into infinipath. |
| 82 | * We use the network layer alloc_skb() allocator to allocate the |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 83 | * memory, and either use the buffers as is for things like verbs |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 84 | * packets, or pass the buffers up to the ipath layered driver and |
| 85 | * thence the network layer, replacing them as we do so (see |
| 86 | * ipath_rcv_layer()). |
| 87 | */ |
| 88 | static int create_port0_egr(struct ipath_devdata *dd) |
| 89 | { |
| 90 | unsigned e, egrcnt; |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 91 | struct ipath_skbinfo *skbinfo; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 92 | int ret; |
| 93 | |
Ralph Campbell | 60948a4 | 2008-01-06 21:02:34 -0800 | [diff] [blame] | 94 | egrcnt = dd->ipath_p0_rcvegrcnt; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 95 | |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 96 | skbinfo = vmalloc(sizeof(*dd->ipath_port0_skbinfo) * egrcnt); |
| 97 | if (skbinfo == NULL) { |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 98 | ipath_dev_err(dd, "allocation error for eager TID " |
| 99 | "skb array\n"); |
| 100 | ret = -ENOMEM; |
| 101 | goto bail; |
| 102 | } |
| 103 | for (e = 0; e < egrcnt; e++) { |
| 104 | /* |
| 105 | * This is a bit tricky in that we allocate extra |
| 106 | * space for 2 bytes of the 14 byte ethernet header. |
| 107 | * These two bytes are passed in the ipath header so |
| 108 | * the rest of the data is word aligned. We allocate |
| 109 | * 4 bytes so that the data buffer stays word aligned. |
| 110 | * See ipath_kreceive() for more details. |
| 111 | */ |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 112 | skbinfo[e].skb = ipath_alloc_skb(dd, GFP_KERNEL); |
| 113 | if (!skbinfo[e].skb) { |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 114 | ipath_dev_err(dd, "SKB allocation error for " |
| 115 | "eager TID %u\n", e); |
| 116 | while (e != 0) |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 117 | dev_kfree_skb(skbinfo[--e].skb); |
| 118 | vfree(skbinfo); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 119 | ret = -ENOMEM; |
| 120 | goto bail; |
| 121 | } |
| 122 | } |
| 123 | /* |
| 124 | * After loop above, so we can test non-NULL to see if ready |
| 125 | * to use at receive, etc. |
| 126 | */ |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 127 | dd->ipath_port0_skbinfo = skbinfo; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 128 | |
| 129 | for (e = 0; e < egrcnt; e++) { |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 130 | dd->ipath_port0_skbinfo[e].phys = |
| 131 | ipath_map_single(dd->pcidev, |
| 132 | dd->ipath_port0_skbinfo[e].skb->data, |
| 133 | dd->ipath_ibmaxlen, PCI_DMA_FROMDEVICE); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 134 | dd->ipath_f_put_tid(dd, e + (u64 __iomem *) |
| 135 | ((char __iomem *) dd->ipath_kregbase + |
Joan Eslinger | f716cdf | 2007-06-18 14:24:39 -0700 | [diff] [blame] | 136 | dd->ipath_rcvegrbase), |
| 137 | RCVHQ_RCV_TYPE_EAGER, |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 138 | dd->ipath_port0_skbinfo[e].phys); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 139 | } |
| 140 | |
| 141 | ret = 0; |
| 142 | |
| 143 | bail: |
| 144 | return ret; |
| 145 | } |
| 146 | |
| 147 | static int bringup_link(struct ipath_devdata *dd) |
| 148 | { |
| 149 | u64 val, ibc; |
| 150 | int ret = 0; |
| 151 | |
| 152 | /* hold IBC in reset */ |
| 153 | dd->ipath_control &= ~INFINIPATH_C_LINKENABLE; |
| 154 | ipath_write_kreg(dd, dd->ipath_kregs->kr_control, |
| 155 | dd->ipath_control); |
| 156 | |
| 157 | /* |
Dave Olson | 826d801 | 2008-04-16 21:01:12 -0700 | [diff] [blame] | 158 | * set initial max size pkt IBC will send, including ICRC; it's the |
| 159 | * PIO buffer size in dwords, less 1; also see ipath_set_mtu() |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 160 | */ |
Dave Olson | 826d801 | 2008-04-16 21:01:12 -0700 | [diff] [blame] | 161 | val = (dd->ipath_ibmaxlen >> 2) + 1; |
| 162 | ibc = val << dd->ibcc_mpl_shift; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 163 | |
Dave Olson | 826d801 | 2008-04-16 21:01:12 -0700 | [diff] [blame] | 164 | /* flowcontrolwatermark is in units of KBytes */ |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 165 | ibc |= 0x5ULL << INFINIPATH_IBCC_FLOWCTRLWATERMARK_SHIFT; |
| 166 | /* |
| 167 | * How often flowctrl sent. More or less in usecs; balance against |
| 168 | * watermark value, so that in theory senders always get a flow |
| 169 | * control update in time to not let the IB link go idle. |
| 170 | */ |
| 171 | ibc |= 0x3ULL << INFINIPATH_IBCC_FLOWCTRLPERIOD_SHIFT; |
| 172 | /* max error tolerance */ |
| 173 | ibc |= 0xfULL << INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT; |
| 174 | /* use "real" buffer space for */ |
| 175 | ibc |= 4ULL << INFINIPATH_IBCC_CREDITSCALE_SHIFT; |
| 176 | /* IB credit flow control. */ |
| 177 | ibc |= 0xfULL << INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT; |
| 178 | /* initially come up waiting for TS1, without sending anything. */ |
| 179 | dd->ipath_ibcctrl = ibc; |
| 180 | /* |
| 181 | * Want to start out with both LINKCMD and LINKINITCMD in NOP |
| 182 | * (0 and 0). Don't put linkinitcmd in ipath_ibcctrl, want that |
Michael Albaugh | 4330e4d | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 183 | * to stay a NOP. Flag that we are disabled, for the (unlikely) |
| 184 | * case that some recovery path is trying to bring the link up |
| 185 | * before we are ready. |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 186 | */ |
| 187 | ibc |= INFINIPATH_IBCC_LINKINITCMD_DISABLE << |
| 188 | INFINIPATH_IBCC_LINKINITCMD_SHIFT; |
Michael Albaugh | 4330e4d | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 189 | dd->ipath_flags |= IPATH_IB_LINK_DISABLED; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 190 | ipath_cdbg(VERBOSE, "Writing 0x%llx to ibcctrl\n", |
| 191 | (unsigned long long) ibc); |
| 192 | ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, ibc); |
| 193 | |
| 194 | // be sure chip saw it |
| 195 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
| 196 | |
| 197 | ret = dd->ipath_f_bringup_serdes(dd); |
| 198 | |
| 199 | if (ret) |
| 200 | dev_info(&dd->pcidev->dev, "Could not initialize SerDes, " |
| 201 | "not usable\n"); |
| 202 | else { |
| 203 | /* enable IBC */ |
| 204 | dd->ipath_control |= INFINIPATH_C_LINKENABLE; |
| 205 | ipath_write_kreg(dd, dd->ipath_kregs->kr_control, |
| 206 | dd->ipath_control); |
| 207 | } |
| 208 | |
| 209 | return ret; |
| 210 | } |
| 211 | |
Michael Albaugh | 27b044a | 2007-03-15 14:45:08 -0700 | [diff] [blame] | 212 | static struct ipath_portdata *create_portdata0(struct ipath_devdata *dd) |
| 213 | { |
| 214 | struct ipath_portdata *pd = NULL; |
| 215 | |
| 216 | pd = kzalloc(sizeof(*pd), GFP_KERNEL); |
| 217 | if (pd) { |
| 218 | pd->port_dd = dd; |
| 219 | pd->port_cnt = 1; |
| 220 | /* The port 0 pkey table is used by the layer interface. */ |
| 221 | pd->port_pkeys[0] = IPATH_DEFAULT_P_KEY; |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 222 | pd->port_seq_cnt = 1; |
Michael Albaugh | 27b044a | 2007-03-15 14:45:08 -0700 | [diff] [blame] | 223 | } |
| 224 | return pd; |
| 225 | } |
| 226 | |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 227 | static int init_chip_first(struct ipath_devdata *dd) |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 228 | { |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 229 | struct ipath_portdata *pd; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 230 | int ret = 0; |
| 231 | u64 val; |
| 232 | |
| 233 | /* |
| 234 | * skip cfgports stuff because we are not allocating memory, |
| 235 | * and we don't want problems if the portcnt changed due to |
| 236 | * cfgports. We do still check and report a difference, if |
| 237 | * not same (should be impossible). |
| 238 | */ |
Ralph Campbell | 60948a4 | 2008-01-06 21:02:34 -0800 | [diff] [blame] | 239 | dd->ipath_f_config_ports(dd, ipath_cfgports); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 240 | if (!ipath_cfgports) |
| 241 | dd->ipath_cfgports = dd->ipath_portcnt; |
| 242 | else if (ipath_cfgports <= dd->ipath_portcnt) { |
| 243 | dd->ipath_cfgports = ipath_cfgports; |
| 244 | ipath_dbg("Configured to use %u ports out of %u in chip\n", |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 245 | dd->ipath_cfgports, ipath_read_kreg32(dd, |
| 246 | dd->ipath_kregs->kr_portcnt)); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 247 | } else { |
| 248 | dd->ipath_cfgports = dd->ipath_portcnt; |
| 249 | ipath_dbg("Tried to configured to use %u ports; chip " |
| 250 | "only supports %u\n", ipath_cfgports, |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 251 | ipath_read_kreg32(dd, |
| 252 | dd->ipath_kregs->kr_portcnt)); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 253 | } |
Bryan O'Sullivan | 8e280d9 | 2006-08-25 11:24:28 -0700 | [diff] [blame] | 254 | /* |
| 255 | * Allocate full portcnt array, rather than just cfgports, because |
| 256 | * cleanup iterates across all possible ports. |
| 257 | */ |
| 258 | dd->ipath_pd = kzalloc(sizeof(*dd->ipath_pd) * dd->ipath_portcnt, |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 259 | GFP_KERNEL); |
| 260 | |
| 261 | if (!dd->ipath_pd) { |
| 262 | ipath_dev_err(dd, "Unable to allocate portdata array, " |
| 263 | "failing\n"); |
| 264 | ret = -ENOMEM; |
| 265 | goto done; |
| 266 | } |
| 267 | |
Michael Albaugh | 27b044a | 2007-03-15 14:45:08 -0700 | [diff] [blame] | 268 | pd = create_portdata0(dd); |
Michael Albaugh | 27b044a | 2007-03-15 14:45:08 -0700 | [diff] [blame] | 269 | if (!pd) { |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 270 | ipath_dev_err(dd, "Unable to allocate portdata for port " |
| 271 | "0, failing\n"); |
| 272 | ret = -ENOMEM; |
| 273 | goto done; |
| 274 | } |
Michael Albaugh | 27b044a | 2007-03-15 14:45:08 -0700 | [diff] [blame] | 275 | dd->ipath_pd[0] = pd; |
| 276 | |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 277 | dd->ipath_rcvtidcnt = |
| 278 | ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidcnt); |
| 279 | dd->ipath_rcvtidbase = |
| 280 | ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidbase); |
| 281 | dd->ipath_rcvegrcnt = |
| 282 | ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrcnt); |
| 283 | dd->ipath_rcvegrbase = |
| 284 | ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrbase); |
| 285 | dd->ipath_palign = |
| 286 | ipath_read_kreg32(dd, dd->ipath_kregs->kr_pagealign); |
| 287 | dd->ipath_piobufbase = |
| 288 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpiobufbase); |
| 289 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpiosize); |
| 290 | dd->ipath_piosize2k = val & ~0U; |
| 291 | dd->ipath_piosize4k = val >> 32; |
Dave Olson | 826d801 | 2008-04-16 21:01:12 -0700 | [diff] [blame] | 292 | if (dd->ipath_piosize4k == 0 && ipath_mtu4096) |
| 293 | ipath_mtu4096 = 0; /* 4KB not supported by this chip */ |
| 294 | dd->ipath_ibmtu = ipath_mtu4096 ? 4096 : 2048; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 295 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpiobufcnt); |
| 296 | dd->ipath_piobcnt2k = val & ~0U; |
| 297 | dd->ipath_piobcnt4k = val >> 32; |
| 298 | dd->ipath_pio2kbase = |
| 299 | (u32 __iomem *) (((char __iomem *) dd->ipath_kregbase) + |
| 300 | (dd->ipath_piobufbase & 0xffffffff)); |
| 301 | if (dd->ipath_piobcnt4k) { |
| 302 | dd->ipath_pio4kbase = (u32 __iomem *) |
| 303 | (((char __iomem *) dd->ipath_kregbase) + |
| 304 | (dd->ipath_piobufbase >> 32)); |
| 305 | /* |
| 306 | * 4K buffers take 2 pages; we use roundup just to be |
| 307 | * paranoid; we calculate it once here, rather than on |
| 308 | * ever buf allocate |
| 309 | */ |
| 310 | dd->ipath_4kalign = ALIGN(dd->ipath_piosize4k, |
| 311 | dd->ipath_palign); |
| 312 | ipath_dbg("%u 2k(%x) piobufs @ %p, %u 4k(%x) @ %p " |
| 313 | "(%x aligned)\n", |
| 314 | dd->ipath_piobcnt2k, dd->ipath_piosize2k, |
| 315 | dd->ipath_pio2kbase, dd->ipath_piobcnt4k, |
| 316 | dd->ipath_piosize4k, dd->ipath_pio4kbase, |
| 317 | dd->ipath_4kalign); |
| 318 | } |
| 319 | else ipath_dbg("%u 2k piobufs @ %p\n", |
| 320 | dd->ipath_piobcnt2k, dd->ipath_pio2kbase); |
| 321 | |
| 322 | spin_lock_init(&dd->ipath_tid_lock); |
John Gregor | e342c11 | 2007-09-05 01:57:14 -0700 | [diff] [blame] | 323 | spin_lock_init(&dd->ipath_sendctrl_lock); |
Michael Albaugh | 17b2eb9 | 2007-05-17 07:05:04 -0700 | [diff] [blame] | 324 | spin_lock_init(&dd->ipath_gpio_lock); |
Michael Albaugh | aecd3b5 | 2007-05-17 07:26:28 -0700 | [diff] [blame] | 325 | spin_lock_init(&dd->ipath_eep_st_lock); |
Matthias Kaehlcke | 2c45688 | 2007-11-15 15:23:25 -0800 | [diff] [blame] | 326 | mutex_init(&dd->ipath_eep_lock); |
Michael Albaugh | 17b2eb9 | 2007-05-17 07:05:04 -0700 | [diff] [blame] | 327 | |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 328 | done: |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 329 | return ret; |
| 330 | } |
| 331 | |
| 332 | /** |
| 333 | * init_chip_reset - re-initialize after a reset, or enable |
| 334 | * @dd: the infinipath device |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 335 | * |
| 336 | * sanity check at least some of the values after reset, and |
| 337 | * ensure no receive or transmit (explictly, in case reset |
| 338 | * failed |
| 339 | */ |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 340 | static int init_chip_reset(struct ipath_devdata *dd) |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 341 | { |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 342 | u32 rtmp; |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 343 | int i; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 344 | |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 345 | /* |
| 346 | * ensure chip does no sends or receives, tail updates, or |
| 347 | * pioavail updates while we re-initialize |
| 348 | */ |
| 349 | dd->ipath_rcvctrl &= ~(1ULL << dd->ipath_r_tailupd_shift); |
| 350 | for (i = 0; i < dd->ipath_portcnt; i++) { |
| 351 | clear_bit(dd->ipath_r_portenable_shift + i, |
| 352 | &dd->ipath_rcvctrl); |
| 353 | clear_bit(dd->ipath_r_intravail_shift + i, |
| 354 | &dd->ipath_rcvctrl); |
| 355 | } |
| 356 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, |
| 357 | dd->ipath_rcvctrl); |
| 358 | |
John Gregor | e342c11 | 2007-09-05 01:57:14 -0700 | [diff] [blame] | 359 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, dd->ipath_sendctrl); |
| 360 | ipath_write_kreg(dd, dd->ipath_kregs->kr_control, dd->ipath_control); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 361 | |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 362 | rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidcnt); |
| 363 | if (rtmp != dd->ipath_rcvtidcnt) |
| 364 | dev_info(&dd->pcidev->dev, "tidcnt was %u before " |
| 365 | "reset, now %u, using original\n", |
| 366 | dd->ipath_rcvtidcnt, rtmp); |
| 367 | rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidbase); |
| 368 | if (rtmp != dd->ipath_rcvtidbase) |
| 369 | dev_info(&dd->pcidev->dev, "tidbase was %u before " |
| 370 | "reset, now %u, using original\n", |
| 371 | dd->ipath_rcvtidbase, rtmp); |
| 372 | rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrcnt); |
| 373 | if (rtmp != dd->ipath_rcvegrcnt) |
| 374 | dev_info(&dd->pcidev->dev, "egrcnt was %u before " |
| 375 | "reset, now %u, using original\n", |
| 376 | dd->ipath_rcvegrcnt, rtmp); |
| 377 | rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrbase); |
| 378 | if (rtmp != dd->ipath_rcvegrbase) |
| 379 | dev_info(&dd->pcidev->dev, "egrbase was %u before " |
| 380 | "reset, now %u, using original\n", |
| 381 | dd->ipath_rcvegrbase, rtmp); |
| 382 | |
| 383 | return 0; |
| 384 | } |
| 385 | |
| 386 | static int init_pioavailregs(struct ipath_devdata *dd) |
| 387 | { |
| 388 | int ret; |
| 389 | |
| 390 | dd->ipath_pioavailregs_dma = dma_alloc_coherent( |
| 391 | &dd->pcidev->dev, PAGE_SIZE, &dd->ipath_pioavailregs_phys, |
| 392 | GFP_KERNEL); |
| 393 | if (!dd->ipath_pioavailregs_dma) { |
| 394 | ipath_dev_err(dd, "failed to allocate PIOavail reg area " |
| 395 | "in memory\n"); |
| 396 | ret = -ENOMEM; |
| 397 | goto done; |
| 398 | } |
| 399 | |
| 400 | /* |
| 401 | * we really want L2 cache aligned, but for current CPUs of |
| 402 | * interest, they are the same. |
| 403 | */ |
| 404 | dd->ipath_statusp = (u64 *) |
| 405 | ((char *)dd->ipath_pioavailregs_dma + |
| 406 | ((2 * L1_CACHE_BYTES + |
| 407 | dd->ipath_pioavregs * sizeof(u64)) & ~L1_CACHE_BYTES)); |
| 408 | /* copy the current value now that it's really allocated */ |
| 409 | *dd->ipath_statusp = dd->_ipath_status; |
| 410 | /* |
| 411 | * setup buffer to hold freeze msg, accessible to apps, |
| 412 | * following statusp |
| 413 | */ |
| 414 | dd->ipath_freezemsg = (char *)&dd->ipath_statusp[1]; |
| 415 | /* and its length */ |
| 416 | dd->ipath_freezelen = L1_CACHE_BYTES - sizeof(dd->ipath_statusp[0]); |
| 417 | |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 418 | ret = 0; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 419 | |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 420 | done: |
| 421 | return ret; |
| 422 | } |
| 423 | |
| 424 | /** |
| 425 | * init_shadow_tids - allocate the shadow TID array |
| 426 | * @dd: the infinipath device |
| 427 | * |
| 428 | * allocate the shadow TID array, so we can ipath_munlock previous |
| 429 | * entries. It may make more sense to move the pageshadow to the |
| 430 | * port data structure, so we only allocate memory for ports actually |
| 431 | * in use, since we at 8k per port, now. |
| 432 | */ |
| 433 | static void init_shadow_tids(struct ipath_devdata *dd) |
| 434 | { |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 435 | struct page **pages; |
| 436 | dma_addr_t *addrs; |
| 437 | |
| 438 | pages = vmalloc(dd->ipath_cfgports * dd->ipath_rcvtidcnt * |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 439 | sizeof(struct page *)); |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 440 | if (!pages) { |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 441 | ipath_dev_err(dd, "failed to allocate shadow page * " |
| 442 | "array, no expected sends!\n"); |
Bryan O'Sullivan | 1fd3b40 | 2006-09-28 09:00:13 -0700 | [diff] [blame] | 443 | dd->ipath_pageshadow = NULL; |
| 444 | return; |
| 445 | } |
| 446 | |
| 447 | addrs = vmalloc(dd->ipath_cfgports * dd->ipath_rcvtidcnt * |
| 448 | sizeof(dma_addr_t)); |
| 449 | if (!addrs) { |
| 450 | ipath_dev_err(dd, "failed to allocate shadow dma handle " |
| 451 | "array, no expected sends!\n"); |
| 452 | vfree(dd->ipath_pageshadow); |
| 453 | dd->ipath_pageshadow = NULL; |
| 454 | return; |
| 455 | } |
| 456 | |
| 457 | memset(pages, 0, dd->ipath_cfgports * dd->ipath_rcvtidcnt * |
| 458 | sizeof(struct page *)); |
| 459 | |
| 460 | dd->ipath_pageshadow = pages; |
| 461 | dd->ipath_physshadow = addrs; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 462 | } |
| 463 | |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 464 | static void enable_chip(struct ipath_devdata *dd, int reinit) |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 465 | { |
| 466 | u32 val; |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 467 | u64 rcvmask; |
John Gregor | e342c11 | 2007-09-05 01:57:14 -0700 | [diff] [blame] | 468 | unsigned long flags; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 469 | int i; |
| 470 | |
Bryan O'Sullivan | 0fd4136 | 2006-08-25 11:24:34 -0700 | [diff] [blame] | 471 | if (!reinit) |
| 472 | init_waitqueue_head(&ipath_state_wait); |
| 473 | |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 474 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, |
| 475 | dd->ipath_rcvctrl); |
| 476 | |
John Gregor | e342c11 | 2007-09-05 01:57:14 -0700 | [diff] [blame] | 477 | spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 478 | /* Enable PIO send, and update of PIOavail regs to memory. */ |
| 479 | dd->ipath_sendctrl = INFINIPATH_S_PIOENABLE | |
| 480 | INFINIPATH_S_PIOBUFAVAILUPD; |
John Gregor | e342c11 | 2007-09-05 01:57:14 -0700 | [diff] [blame] | 481 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, dd->ipath_sendctrl); |
| 482 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
| 483 | spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 484 | |
| 485 | /* |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 486 | * Enable kernel ports' receive and receive interrupt. |
| 487 | * Other ports done as user opens and inits them. |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 488 | */ |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 489 | rcvmask = 1ULL; |
| 490 | dd->ipath_rcvctrl |= (rcvmask << dd->ipath_r_portenable_shift) | |
| 491 | (rcvmask << dd->ipath_r_intravail_shift); |
| 492 | if (!(dd->ipath_flags & IPATH_NODMA_RTAIL)) |
| 493 | dd->ipath_rcvctrl |= (1ULL << dd->ipath_r_tailupd_shift); |
| 494 | |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 495 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, |
| 496 | dd->ipath_rcvctrl); |
| 497 | |
| 498 | /* |
| 499 | * now ready for use. this should be cleared whenever we |
| 500 | * detect a reset, or initiate one. |
| 501 | */ |
| 502 | dd->ipath_flags |= IPATH_INITTED; |
| 503 | |
| 504 | /* |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 505 | * Init our shadow copies of head from tail values, |
| 506 | * and write head values to match. |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 507 | */ |
| 508 | val = ipath_read_ureg32(dd, ur_rcvegrindextail, 0); |
Ralph Campbell | 8c641d4 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 509 | ipath_write_ureg(dd, ur_rcvegrindexhead, val, 0); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 510 | |
| 511 | /* Initialize so we interrupt on next packet received */ |
Ralph Campbell | 8c641d4 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 512 | ipath_write_ureg(dd, ur_rcvhdrhead, |
| 513 | dd->ipath_rhdrhead_intr_off | |
| 514 | dd->ipath_pd[0]->port_head, 0); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 515 | |
| 516 | /* |
| 517 | * by now pioavail updates to memory should have occurred, so |
| 518 | * copy them into our working/shadow registers; this is in |
| 519 | * case something went wrong with abort, but mostly to get the |
| 520 | * initial values of the generation bit correct. |
| 521 | */ |
| 522 | for (i = 0; i < dd->ipath_pioavregs; i++) { |
Roland Dreier | 6358ae2 | 2008-04-16 21:01:07 -0700 | [diff] [blame] | 523 | __le64 pioavail; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 524 | |
| 525 | /* |
| 526 | * Chip Errata bug 6641; even and odd qwords>3 are swapped. |
| 527 | */ |
Ralph Campbell | 4ea61b5 | 2008-01-06 21:12:38 -0800 | [diff] [blame] | 528 | if (i > 3 && (dd->ipath_flags & IPATH_SWAP_PIOBUFS)) |
Roland Dreier | 6358ae2 | 2008-04-16 21:01:07 -0700 | [diff] [blame] | 529 | pioavail = dd->ipath_pioavailregs_dma[i ^ 1]; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 530 | else |
Roland Dreier | 6358ae2 | 2008-04-16 21:01:07 -0700 | [diff] [blame] | 531 | pioavail = dd->ipath_pioavailregs_dma[i]; |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 532 | dd->ipath_pioavailshadow[i] = le64_to_cpu(pioavail) | |
| 533 | (~dd->ipath_pioavailkernel[i] << |
| 534 | INFINIPATH_SENDPIOAVAIL_BUSY_SHIFT); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 535 | } |
| 536 | /* can get counters, stats, etc. */ |
| 537 | dd->ipath_flags |= IPATH_PRESENT; |
| 538 | } |
| 539 | |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 540 | static int init_housekeeping(struct ipath_devdata *dd, int reinit) |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 541 | { |
| 542 | char boardn[32]; |
| 543 | int ret = 0; |
| 544 | |
| 545 | /* |
| 546 | * have to clear shadow copies of registers at init that are |
| 547 | * not otherwise set here, or all kinds of bizarre things |
| 548 | * happen with driver on chip reset |
| 549 | */ |
| 550 | dd->ipath_rcvhdrsize = 0; |
| 551 | |
| 552 | /* |
| 553 | * Don't clear ipath_flags as 8bit mode was set before |
| 554 | * entering this func. However, we do set the linkstate to |
| 555 | * unknown, so we can watch for a transition. |
Bryan O'Sullivan | 52e7fad | 2006-04-24 14:23:00 -0700 | [diff] [blame] | 556 | * PRESENT is set because we want register reads to work, |
| 557 | * and the kernel infrastructure saw it in config space; |
| 558 | * We clear it if we have failures. |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 559 | */ |
Bryan O'Sullivan | 52e7fad | 2006-04-24 14:23:00 -0700 | [diff] [blame] | 560 | dd->ipath_flags |= IPATH_LINKUNK | IPATH_PRESENT; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 561 | dd->ipath_flags &= ~(IPATH_LINKACTIVE | IPATH_LINKARMED | |
| 562 | IPATH_LINKDOWN | IPATH_LINKINIT); |
| 563 | |
| 564 | ipath_cdbg(VERBOSE, "Try to read spc chip revision\n"); |
| 565 | dd->ipath_revision = |
| 566 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_revision); |
| 567 | |
| 568 | /* |
| 569 | * set up fundamental info we need to use the chip; we assume |
| 570 | * if the revision reg and these regs are OK, we don't need to |
| 571 | * special case the rest |
| 572 | */ |
| 573 | dd->ipath_sregbase = |
| 574 | ipath_read_kreg32(dd, dd->ipath_kregs->kr_sendregbase); |
| 575 | dd->ipath_cregbase = |
| 576 | ipath_read_kreg32(dd, dd->ipath_kregs->kr_counterregbase); |
| 577 | dd->ipath_uregbase = |
| 578 | ipath_read_kreg32(dd, dd->ipath_kregs->kr_userregbase); |
| 579 | ipath_cdbg(VERBOSE, "ipath_kregbase %p, sendbase %x usrbase %x, " |
| 580 | "cntrbase %x\n", dd->ipath_kregbase, dd->ipath_sregbase, |
| 581 | dd->ipath_uregbase, dd->ipath_cregbase); |
| 582 | if ((dd->ipath_revision & 0xffffffff) == 0xffffffff |
| 583 | || (dd->ipath_sregbase & 0xffffffff) == 0xffffffff |
| 584 | || (dd->ipath_cregbase & 0xffffffff) == 0xffffffff |
| 585 | || (dd->ipath_uregbase & 0xffffffff) == 0xffffffff) { |
| 586 | ipath_dev_err(dd, "Register read failures from chip, " |
| 587 | "giving up initialization\n"); |
Bryan O'Sullivan | 52e7fad | 2006-04-24 14:23:00 -0700 | [diff] [blame] | 588 | dd->ipath_flags &= ~IPATH_PRESENT; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 589 | ret = -ENODEV; |
| 590 | goto done; |
| 591 | } |
| 592 | |
Bryan O'Sullivan | 9783ab4 | 2007-03-15 14:45:07 -0700 | [diff] [blame] | 593 | |
| 594 | /* clear diagctrl register, in case diags were running and crashed */ |
| 595 | ipath_write_kreg (dd, dd->ipath_kregs->kr_hwdiagctrl, 0); |
| 596 | |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 597 | /* clear the initial reset flag, in case first driver load */ |
| 598 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, |
| 599 | INFINIPATH_E_RESET); |
| 600 | |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 601 | ipath_cdbg(VERBOSE, "Revision %llx (PCI %x)\n", |
| 602 | (unsigned long long) dd->ipath_revision, |
| 603 | dd->ipath_pcirev); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 604 | |
| 605 | if (((dd->ipath_revision >> INFINIPATH_R_SOFTWARE_SHIFT) & |
| 606 | INFINIPATH_R_SOFTWARE_MASK) != IPATH_CHIP_SWVERSION) { |
| 607 | ipath_dev_err(dd, "Driver only handles version %d, " |
| 608 | "chip swversion is %d (%llx), failng\n", |
| 609 | IPATH_CHIP_SWVERSION, |
| 610 | (int)(dd->ipath_revision >> |
| 611 | INFINIPATH_R_SOFTWARE_SHIFT) & |
| 612 | INFINIPATH_R_SOFTWARE_MASK, |
| 613 | (unsigned long long) dd->ipath_revision); |
| 614 | ret = -ENOSYS; |
| 615 | goto done; |
| 616 | } |
| 617 | dd->ipath_majrev = (u8) ((dd->ipath_revision >> |
| 618 | INFINIPATH_R_CHIPREVMAJOR_SHIFT) & |
| 619 | INFINIPATH_R_CHIPREVMAJOR_MASK); |
| 620 | dd->ipath_minrev = (u8) ((dd->ipath_revision >> |
| 621 | INFINIPATH_R_CHIPREVMINOR_SHIFT) & |
| 622 | INFINIPATH_R_CHIPREVMINOR_MASK); |
| 623 | dd->ipath_boardrev = (u8) ((dd->ipath_revision >> |
| 624 | INFINIPATH_R_BOARDID_SHIFT) & |
| 625 | INFINIPATH_R_BOARDID_MASK); |
| 626 | |
| 627 | ret = dd->ipath_f_get_boardname(dd, boardn, sizeof boardn); |
| 628 | |
| 629 | snprintf(dd->ipath_boardversion, sizeof(dd->ipath_boardversion), |
Dave Olson | 12f9a49 | 2007-07-06 12:48:43 -0700 | [diff] [blame] | 630 | "ChipABI %u.%u, %s, InfiniPath%u %u.%u, PCI %u, " |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 631 | "SW Compat %u\n", |
| 632 | IPATH_CHIP_VERS_MAJ, IPATH_CHIP_VERS_MIN, boardn, |
| 633 | (unsigned)(dd->ipath_revision >> INFINIPATH_R_ARCH_SHIFT) & |
| 634 | INFINIPATH_R_ARCH_MASK, |
| 635 | dd->ipath_majrev, dd->ipath_minrev, dd->ipath_pcirev, |
| 636 | (unsigned)(dd->ipath_revision >> |
| 637 | INFINIPATH_R_SOFTWARE_SHIFT) & |
| 638 | INFINIPATH_R_SOFTWARE_MASK); |
| 639 | |
| 640 | ipath_dbg("%s", dd->ipath_boardversion); |
| 641 | |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 642 | if (ret) |
| 643 | goto done; |
| 644 | |
| 645 | if (reinit) |
| 646 | ret = init_chip_reset(dd); |
| 647 | else |
| 648 | ret = init_chip_first(dd); |
| 649 | |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 650 | done: |
| 651 | return ret; |
| 652 | } |
| 653 | |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 654 | /** |
| 655 | * ipath_init_chip - do the actual initialization sequence on the chip |
| 656 | * @dd: the infinipath device |
| 657 | * @reinit: reinitializing, so don't allocate new memory |
| 658 | * |
| 659 | * Do the actual initialization sequence on the chip. This is done |
| 660 | * both from the init routine called from the PCI infrastructure, and |
| 661 | * when we reset the chip, or detect that it was reset internally, |
| 662 | * or it's administratively re-enabled. |
| 663 | * |
| 664 | * Memory allocation here and in called routines is only done in |
| 665 | * the first case (reinit == 0). We have to be careful, because even |
| 666 | * without memory allocation, we need to re-write all the chip registers |
| 667 | * TIDs, etc. after the reset or enable has completed. |
| 668 | */ |
| 669 | int ipath_init_chip(struct ipath_devdata *dd, int reinit) |
| 670 | { |
Ralph Campbell | c59a80a | 2007-12-20 02:43:23 -0800 | [diff] [blame] | 671 | int ret = 0; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 672 | u32 val32, kpiobufs; |
Bryan O'Sullivan | 0ed3c59 | 2007-03-15 14:45:02 -0700 | [diff] [blame] | 673 | u32 piobufs, uports; |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 674 | u64 val; |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 675 | struct ipath_portdata *pd; |
Bryan O'Sullivan | 35783ec | 2006-07-01 04:36:15 -0700 | [diff] [blame] | 676 | gfp_t gfp_flags = GFP_USER | __GFP_COMP; |
John Gregor | e342c11 | 2007-09-05 01:57:14 -0700 | [diff] [blame] | 677 | unsigned long flags; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 678 | |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 679 | ret = init_housekeeping(dd, reinit); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 680 | if (ret) |
| 681 | goto done; |
| 682 | |
| 683 | /* |
| 684 | * we ignore most issues after reporting them, but have to specially |
| 685 | * handle hardware-disabled chips. |
| 686 | */ |
| 687 | if (ret == 2) { |
| 688 | /* unique error, known to ipath_init_one */ |
| 689 | ret = -EPERM; |
| 690 | goto done; |
| 691 | } |
| 692 | |
| 693 | /* |
| 694 | * We could bump this to allow for full rcvegrcnt + rcvtidcnt, |
| 695 | * but then it no longer nicely fits power of two, and since |
| 696 | * we now use routines that backend onto __get_free_pages, the |
| 697 | * rest would be wasted. |
| 698 | */ |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 699 | dd->ipath_rcvhdrcnt = max(dd->ipath_p0_rcvegrcnt, dd->ipath_rcvegrcnt); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 700 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrcnt, |
| 701 | dd->ipath_rcvhdrcnt); |
| 702 | |
| 703 | /* |
| 704 | * Set up the shadow copies of the piobufavail registers, |
| 705 | * which we compare against the chip registers for now, and |
| 706 | * the in memory DMA'ed copies of the registers. This has to |
| 707 | * be done early, before we calculate lastport, etc. |
| 708 | */ |
Bryan O'Sullivan | 0ed3c59 | 2007-03-15 14:45:02 -0700 | [diff] [blame] | 709 | piobufs = dd->ipath_piobcnt2k + dd->ipath_piobcnt4k; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 710 | /* |
| 711 | * calc number of pioavail registers, and save it; we have 2 |
| 712 | * bits per buffer. |
| 713 | */ |
Bryan O'Sullivan | 0ed3c59 | 2007-03-15 14:45:02 -0700 | [diff] [blame] | 714 | dd->ipath_pioavregs = ALIGN(piobufs, sizeof(u64) * BITS_PER_BYTE / 2) |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 715 | / (sizeof(u64) * BITS_PER_BYTE / 2); |
Bryan O'Sullivan | 0ed3c59 | 2007-03-15 14:45:02 -0700 | [diff] [blame] | 716 | uports = dd->ipath_cfgports ? dd->ipath_cfgports - 1 : 0; |
Bryan O'Sullivan | 52e7fad | 2006-04-24 14:23:00 -0700 | [diff] [blame] | 717 | if (ipath_kpiobufs == 0) { |
Bryan O'Sullivan | ba11203 | 2006-08-25 11:24:29 -0700 | [diff] [blame] | 718 | /* not set by user (this is default) */ |
Ralph Campbell | 37a7e9b | 2007-07-06 12:48:38 -0700 | [diff] [blame] | 719 | if (piobufs > 144) |
Bryan O'Sullivan | 52e7fad | 2006-04-24 14:23:00 -0700 | [diff] [blame] | 720 | kpiobufs = 32; |
| 721 | else |
| 722 | kpiobufs = 16; |
| 723 | } |
| 724 | else |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 725 | kpiobufs = ipath_kpiobufs; |
| 726 | |
Bryan O'Sullivan | 0ed3c59 | 2007-03-15 14:45:02 -0700 | [diff] [blame] | 727 | if (kpiobufs + (uports * IPATH_MIN_USER_PORT_BUFCNT) > piobufs) { |
Ralph Campbell | c59a80a | 2007-12-20 02:43:23 -0800 | [diff] [blame] | 728 | int i = (int) piobufs - |
Bryan O'Sullivan | 0ed3c59 | 2007-03-15 14:45:02 -0700 | [diff] [blame] | 729 | (int) (uports * IPATH_MIN_USER_PORT_BUFCNT); |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 730 | if (i < 1) |
| 731 | i = 1; |
Bryan O'Sullivan | 0ed3c59 | 2007-03-15 14:45:02 -0700 | [diff] [blame] | 732 | dev_info(&dd->pcidev->dev, "Allocating %d PIO bufs of " |
| 733 | "%d for kernel leaves too few for %d user ports " |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 734 | "(%d each); using %u\n", kpiobufs, |
Bryan O'Sullivan | 0ed3c59 | 2007-03-15 14:45:02 -0700 | [diff] [blame] | 735 | piobufs, uports, IPATH_MIN_USER_PORT_BUFCNT, i); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 736 | /* |
| 737 | * shouldn't change ipath_kpiobufs, because could be |
| 738 | * different for different devices... |
| 739 | */ |
| 740 | kpiobufs = i; |
| 741 | } |
Bryan O'Sullivan | 0ed3c59 | 2007-03-15 14:45:02 -0700 | [diff] [blame] | 742 | dd->ipath_lastport_piobuf = piobufs - kpiobufs; |
| 743 | dd->ipath_pbufsport = |
| 744 | uports ? dd->ipath_lastport_piobuf / uports : 0; |
| 745 | val32 = dd->ipath_lastport_piobuf - (dd->ipath_pbufsport * uports); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 746 | if (val32 > 0) { |
| 747 | ipath_dbg("allocating %u pbufs/port leaves %u unused, " |
| 748 | "add to kernel\n", dd->ipath_pbufsport, val32); |
| 749 | dd->ipath_lastport_piobuf -= val32; |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 750 | kpiobufs += val32; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 751 | ipath_dbg("%u pbufs/port leaves %u unused, add to kernel\n", |
| 752 | dd->ipath_pbufsport, val32); |
| 753 | } |
Ralph Campbell | c4b4d16 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 754 | dd->ipath_lastpioindex = 0; |
| 755 | dd->ipath_lastpioindexl = dd->ipath_piobcnt2k; |
| 756 | ipath_chg_pioavailkernel(dd, 0, piobufs, 1); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 757 | ipath_cdbg(VERBOSE, "%d PIO bufs for kernel out of %d total %u " |
| 758 | "each for %u user ports\n", kpiobufs, |
Bryan O'Sullivan | 0ed3c59 | 2007-03-15 14:45:02 -0700 | [diff] [blame] | 759 | piobufs, dd->ipath_pbufsport, uports); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 760 | |
| 761 | dd->ipath_f_early_init(dd); |
Dave Olson | 9380068 | 2007-06-18 14:24:41 -0700 | [diff] [blame] | 762 | /* |
Ralph Campbell | 2ba3f56 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 763 | * Cancel any possible active sends from early driver load. |
Dave Olson | 9380068 | 2007-06-18 14:24:41 -0700 | [diff] [blame] | 764 | * Follows early_init because some chips have to initialize |
| 765 | * PIO buffers in early_init to avoid false parity errors. |
| 766 | */ |
Dave Olson | 3810f2a | 2007-07-20 14:23:37 -0700 | [diff] [blame] | 767 | ipath_cancel_sends(dd, 0); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 768 | |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 769 | /* |
| 770 | * Early_init sets rcvhdrentsize and rcvhdrsize, so this must be |
| 771 | * done after early_init. |
| 772 | */ |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 773 | dd->ipath_hdrqlast = |
| 774 | dd->ipath_rcvhdrentsize * (dd->ipath_rcvhdrcnt - 1); |
| 775 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrentsize, |
| 776 | dd->ipath_rcvhdrentsize); |
| 777 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrsize, |
| 778 | dd->ipath_rcvhdrsize); |
| 779 | |
| 780 | if (!reinit) { |
| 781 | ret = init_pioavailregs(dd); |
| 782 | init_shadow_tids(dd); |
| 783 | if (ret) |
| 784 | goto done; |
| 785 | } |
| 786 | |
Ralph Campbell | 8c641d4 | 2008-04-16 21:09:26 -0700 | [diff] [blame] | 787 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendpioavailaddr, |
| 788 | dd->ipath_pioavailregs_phys); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 789 | /* |
| 790 | * this is to detect s/w errors, which the h/w works around by |
| 791 | * ignoring the low 6 bits of address, if it wasn't aligned. |
| 792 | */ |
| 793 | val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpioavailaddr); |
| 794 | if (val != dd->ipath_pioavailregs_phys) { |
| 795 | ipath_dev_err(dd, "Catastrophic software error, " |
| 796 | "SendPIOAvailAddr written as %lx, " |
| 797 | "read back as %llx\n", |
| 798 | (unsigned long) dd->ipath_pioavailregs_phys, |
| 799 | (unsigned long long) val); |
| 800 | ret = -EINVAL; |
| 801 | goto done; |
| 802 | } |
| 803 | |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 804 | ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvbthqp, IPATH_KD_QP); |
| 805 | |
| 806 | /* |
| 807 | * make sure we are not in freeze, and PIO send enabled, so |
| 808 | * writes to pbc happen |
| 809 | */ |
| 810 | ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask, 0ULL); |
| 811 | ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, |
| 812 | ~0ULL&~INFINIPATH_HWE_MEMBISTFAILED); |
| 813 | ipath_write_kreg(dd, dd->ipath_kregs->kr_control, 0ULL); |
John Gregor | e342c11 | 2007-09-05 01:57:14 -0700 | [diff] [blame] | 814 | |
| 815 | spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); |
| 816 | dd->ipath_sendctrl = INFINIPATH_S_PIOENABLE; |
| 817 | ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, dd->ipath_sendctrl); |
| 818 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); |
| 819 | spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 820 | |
| 821 | /* |
| 822 | * before error clears, since we expect serdes pll errors during |
| 823 | * this, the first time after reset |
| 824 | */ |
| 825 | if (bringup_link(dd)) { |
| 826 | dev_info(&dd->pcidev->dev, "Failed to bringup IB link\n"); |
| 827 | ret = -ENETDOWN; |
| 828 | goto done; |
| 829 | } |
| 830 | |
| 831 | /* |
| 832 | * clear any "expected" hwerrs from reset and/or initialization |
| 833 | * clear any that aren't enabled (at least this once), and then |
| 834 | * set the enable mask |
| 835 | */ |
| 836 | dd->ipath_f_init_hwerrors(dd); |
| 837 | ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, |
| 838 | ~0ULL&~INFINIPATH_HWE_MEMBISTFAILED); |
| 839 | ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask, |
| 840 | dd->ipath_hwerrmask); |
| 841 | |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 842 | /* clear all */ |
| 843 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, -1LL); |
| 844 | /* enable errors that are masked, at least this first time. */ |
| 845 | ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask, |
| 846 | ~dd->ipath_maskederrs); |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 847 | dd->ipath_maskederrs = 0; /* don't re-enable ignored in timer */ |
| 848 | dd->ipath_errormask = |
| 849 | ipath_read_kreg64(dd, dd->ipath_kregs->kr_errormask); |
Dave Olson | 78d1e02 | 2007-07-20 14:41:26 -0700 | [diff] [blame] | 850 | /* clear any interrupts up to this point (ints still not enabled) */ |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 851 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, -1LL); |
| 852 | |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 853 | dd->ipath_f_tidtemplate(dd); |
| 854 | |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 855 | /* |
| 856 | * Set up the port 0 (kernel) rcvhdr q and egr TIDs. If doing |
| 857 | * re-init, the simplest way to handle this is to free |
| 858 | * existing, and re-allocate. |
Michael Albaugh | 27b044a | 2007-03-15 14:45:08 -0700 | [diff] [blame] | 859 | * Need to re-create rest of port 0 portdata as well. |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 860 | */ |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 861 | pd = dd->ipath_pd[0]; |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 862 | if (reinit) { |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 863 | struct ipath_portdata *npd; |
| 864 | |
| 865 | /* |
| 866 | * Alloc and init new ipath_portdata for port0, |
Michael Albaugh | 27b044a | 2007-03-15 14:45:08 -0700 | [diff] [blame] | 867 | * Then free old pd. Could lead to fragmentation, but also |
| 868 | * makes later support for hot-swap easier. |
| 869 | */ |
Michael Albaugh | 27b044a | 2007-03-15 14:45:08 -0700 | [diff] [blame] | 870 | npd = create_portdata0(dd); |
| 871 | if (npd) { |
| 872 | ipath_free_pddata(dd, pd); |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 873 | dd->ipath_pd[0] = npd; |
| 874 | pd = npd; |
Michael Albaugh | 27b044a | 2007-03-15 14:45:08 -0700 | [diff] [blame] | 875 | } else { |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 876 | ipath_dev_err(dd, "Unable to allocate portdata" |
| 877 | " for port 0, failing\n"); |
Michael Albaugh | 27b044a | 2007-03-15 14:45:08 -0700 | [diff] [blame] | 878 | ret = -ENOMEM; |
| 879 | goto done; |
| 880 | } |
Bryan O'Sullivan | f37bda9 | 2006-07-01 04:36:03 -0700 | [diff] [blame] | 881 | } |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 882 | ret = ipath_create_rcvhdrq(dd, pd); |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 883 | if (!ret) |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 884 | ret = create_port0_egr(dd); |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 885 | if (ret) { |
| 886 | ipath_dev_err(dd, "failed to allocate kernel port's " |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 887 | "rcvhdrq and/or egr bufs\n"); |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 888 | goto done; |
| 889 | } |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 890 | else |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 891 | enable_chip(dd, reinit); |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 892 | |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 893 | if (!reinit) { |
| 894 | /* |
| 895 | * Used when we close a port, for DMA already in flight |
| 896 | * at close. |
| 897 | */ |
Bryan O'Sullivan | 35783ec | 2006-07-01 04:36:15 -0700 | [diff] [blame] | 898 | dd->ipath_dummy_hdrq = dma_alloc_coherent( |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 899 | &dd->pcidev->dev, dd->ipath_pd[0]->port_rcvhdrq_size, |
Bryan O'Sullivan | 35783ec | 2006-07-01 04:36:15 -0700 | [diff] [blame] | 900 | &dd->ipath_dummy_hdrq_phys, |
| 901 | gfp_flags); |
Ralph Campbell | 2ba3f56 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 902 | if (!dd->ipath_dummy_hdrq) { |
Bryan O'Sullivan | 35783ec | 2006-07-01 04:36:15 -0700 | [diff] [blame] | 903 | dev_info(&dd->pcidev->dev, |
| 904 | "Couldn't allocate 0x%lx bytes for dummy hdrq\n", |
Ralph Campbell | 9355fb6 | 2008-04-16 21:09:29 -0700 | [diff] [blame^] | 905 | dd->ipath_pd[0]->port_rcvhdrq_size); |
Bryan O'Sullivan | 35783ec | 2006-07-01 04:36:15 -0700 | [diff] [blame] | 906 | /* fallback to just 0'ing */ |
| 907 | dd->ipath_dummy_hdrq_phys = 0UL; |
| 908 | } |
| 909 | } |
| 910 | |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 911 | /* |
| 912 | * cause retrigger of pending interrupts ignored during init, |
| 913 | * even if we had errors |
| 914 | */ |
| 915 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, 0ULL); |
| 916 | |
Ralph Campbell | 2ba3f56 | 2008-04-16 21:09:29 -0700 | [diff] [blame] | 917 | if (!dd->ipath_stats_timer_active) { |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 918 | /* |
| 919 | * first init, or after an admin disable/enable |
| 920 | * set up stats retrieval timer, even if we had errors |
| 921 | * in last portion of setup |
| 922 | */ |
| 923 | init_timer(&dd->ipath_stats_timer); |
| 924 | dd->ipath_stats_timer.function = ipath_get_faststats; |
| 925 | dd->ipath_stats_timer.data = (unsigned long) dd; |
| 926 | /* every 5 seconds; */ |
| 927 | dd->ipath_stats_timer.expires = jiffies + 5 * HZ; |
| 928 | /* takes ~16 seconds to overflow at full IB 4x bandwdith */ |
| 929 | add_timer(&dd->ipath_stats_timer); |
| 930 | dd->ipath_stats_timer_active = 1; |
| 931 | } |
| 932 | |
John Gregor | 58411d1 | 2008-04-16 21:09:24 -0700 | [diff] [blame] | 933 | /* Set up HoL state */ |
| 934 | init_timer(&dd->ipath_hol_timer); |
| 935 | dd->ipath_hol_timer.function = ipath_hol_event; |
| 936 | dd->ipath_hol_timer.data = (unsigned long)dd; |
| 937 | dd->ipath_hol_state = IPATH_HOL_UP; |
| 938 | |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 939 | done: |
| 940 | if (!ret) { |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 941 | *dd->ipath_statusp |= IPATH_STATUS_CHIP_PRESENT; |
| 942 | if (!dd->ipath_f_intrsetup(dd)) { |
| 943 | /* now we can enable all interrupts from the chip */ |
| 944 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, |
| 945 | -1LL); |
| 946 | /* force re-interrupt of any pending interrupts. */ |
| 947 | ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, |
| 948 | 0ULL); |
| 949 | /* chip is usable; mark it as initialized */ |
| 950 | *dd->ipath_statusp |= IPATH_STATUS_INITTED; |
| 951 | } else |
| 952 | ipath_dev_err(dd, "No interrupts enabled, couldn't " |
| 953 | "setup interrupt address\n"); |
| 954 | |
| 955 | if (dd->ipath_cfgports > ipath_stats.sps_nports) |
| 956 | /* |
| 957 | * sps_nports is a global, so, we set it to |
| 958 | * the highest number of ports of any of the |
| 959 | * chips we find; we never decrement it, at |
| 960 | * least for now. Since this might have changed |
| 961 | * over disable/enable or prior to reset, always |
| 962 | * do the check and potentially adjust. |
| 963 | */ |
| 964 | ipath_stats.sps_nports = dd->ipath_cfgports; |
| 965 | } else |
| 966 | ipath_dbg("Failed (%d) to initialize chip\n", ret); |
| 967 | |
| 968 | /* if ret is non-zero, we probably should do some cleanup |
| 969 | here... */ |
| 970 | return ret; |
| 971 | } |
| 972 | |
| 973 | static int ipath_set_kpiobufs(const char *str, struct kernel_param *kp) |
| 974 | { |
| 975 | struct ipath_devdata *dd; |
| 976 | unsigned long flags; |
| 977 | unsigned short val; |
| 978 | int ret; |
| 979 | |
| 980 | ret = ipath_parse_ushort(str, &val); |
| 981 | |
| 982 | spin_lock_irqsave(&ipath_devs_lock, flags); |
| 983 | |
| 984 | if (ret < 0) |
| 985 | goto bail; |
| 986 | |
| 987 | if (val == 0) { |
| 988 | ret = -EINVAL; |
| 989 | goto bail; |
| 990 | } |
| 991 | |
| 992 | list_for_each_entry(dd, &ipath_dev_list, ipath_list) { |
| 993 | if (dd->ipath_kregbase) |
| 994 | continue; |
| 995 | if (val > (dd->ipath_piobcnt2k + dd->ipath_piobcnt4k - |
| 996 | (dd->ipath_cfgports * |
| 997 | IPATH_MIN_USER_PORT_BUFCNT))) |
| 998 | { |
| 999 | ipath_dev_err( |
| 1000 | dd, |
| 1001 | "Allocating %d PIO bufs for kernel leaves " |
| 1002 | "too few for %d user ports (%d each)\n", |
| 1003 | val, dd->ipath_cfgports - 1, |
| 1004 | IPATH_MIN_USER_PORT_BUFCNT); |
| 1005 | ret = -EINVAL; |
| 1006 | goto bail; |
| 1007 | } |
| 1008 | dd->ipath_lastport_piobuf = |
| 1009 | dd->ipath_piobcnt2k + dd->ipath_piobcnt4k - val; |
| 1010 | } |
| 1011 | |
Bryan O'Sullivan | ba11203 | 2006-08-25 11:24:29 -0700 | [diff] [blame] | 1012 | ipath_kpiobufs = val; |
Bryan O'Sullivan | 097709f | 2006-03-29 15:23:28 -0800 | [diff] [blame] | 1013 | ret = 0; |
| 1014 | bail: |
| 1015 | spin_unlock_irqrestore(&ipath_devs_lock, flags); |
| 1016 | |
| 1017 | return ret; |
| 1018 | } |