1*e974f91cSConrad Meyer /*- 2*e974f91cSConrad Meyer * Copyright (C) 2012 Intel Corporation 3*e974f91cSConrad Meyer * All rights reserved. 4*e974f91cSConrad Meyer * 5*e974f91cSConrad Meyer * Redistribution and use in source and binary forms, with or without 6*e974f91cSConrad Meyer * modification, are permitted provided that the following conditions 7*e974f91cSConrad Meyer * are met: 8*e974f91cSConrad Meyer * 1. Redistributions of source code must retain the above copyright 9*e974f91cSConrad Meyer * notice, this list of conditions and the following disclaimer. 10*e974f91cSConrad Meyer * 2. Redistributions in binary form must reproduce the above copyright 11*e974f91cSConrad Meyer * notice, this list of conditions and the following disclaimer in the 12*e974f91cSConrad Meyer * documentation and/or other materials provided with the distribution. 13*e974f91cSConrad Meyer * 14*e974f91cSConrad Meyer * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15*e974f91cSConrad Meyer * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16*e974f91cSConrad Meyer * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17*e974f91cSConrad Meyer * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18*e974f91cSConrad Meyer * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19*e974f91cSConrad Meyer * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20*e974f91cSConrad Meyer * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21*e974f91cSConrad Meyer * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22*e974f91cSConrad Meyer * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23*e974f91cSConrad Meyer * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24*e974f91cSConrad Meyer * SUCH DAMAGE. 25*e974f91cSConrad Meyer */ 26*e974f91cSConrad Meyer 27*e974f91cSConrad Meyer #include <sys/cdefs.h> 28*e974f91cSConrad Meyer __FBSDID("$FreeBSD$"); 29*e974f91cSConrad Meyer 30*e974f91cSConrad Meyer #include <sys/param.h> 31*e974f91cSConrad Meyer #include <sys/systm.h> 32*e974f91cSConrad Meyer #include <sys/bus.h> 33*e974f91cSConrad Meyer #include <sys/conf.h> 34*e974f91cSConrad Meyer #include <sys/ioccom.h> 35*e974f91cSConrad Meyer #include <sys/kernel.h> 36*e974f91cSConrad Meyer #include <sys/lock.h> 37*e974f91cSConrad Meyer #include <sys/malloc.h> 38*e974f91cSConrad Meyer #include <sys/module.h> 39*e974f91cSConrad Meyer #include <sys/mutex.h> 40*e974f91cSConrad Meyer #include <sys/rman.h> 41*e974f91cSConrad Meyer #include <sys/sysctl.h> 42*e974f91cSConrad Meyer #include <sys/time.h> 43*e974f91cSConrad Meyer #include <dev/pci/pcireg.h> 44*e974f91cSConrad Meyer #include <dev/pci/pcivar.h> 45*e974f91cSConrad Meyer #include <machine/bus.h> 46*e974f91cSConrad Meyer #include <machine/resource.h> 47*e974f91cSConrad Meyer #include <machine/stdarg.h> 48*e974f91cSConrad Meyer 49*e974f91cSConrad Meyer #include "ioat.h" 50*e974f91cSConrad Meyer #include "ioat_hw.h" 51*e974f91cSConrad Meyer #include "ioat_internal.h" 52*e974f91cSConrad Meyer 53*e974f91cSConrad Meyer static int ioat_probe(device_t device); 54*e974f91cSConrad Meyer static int ioat_attach(device_t device); 55*e974f91cSConrad Meyer static int ioat_detach(device_t device); 56*e974f91cSConrad Meyer static int ioat3_attach(device_t device); 57*e974f91cSConrad Meyer static int ioat_map_pci_bar(struct ioat_softc *ioat); 58*e974f91cSConrad Meyer static void ioat_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, 59*e974f91cSConrad Meyer int error); 60*e974f91cSConrad Meyer static int ioat_interrupt_setup(struct ioat_softc *ioat); 61*e974f91cSConrad Meyer static void ioat_interrupt_handler(void *arg); 62*e974f91cSConrad Meyer static void ioat_process_events(struct ioat_softc *ioat); 63*e974f91cSConrad Meyer static inline uint32_t ioat_get_active(struct ioat_softc *ioat); 64*e974f91cSConrad Meyer static inline uint32_t ioat_get_ring_space(struct ioat_softc *ioat); 65*e974f91cSConrad Meyer static void ioat_free_ring_entry(struct ioat_softc *ioat, 66*e974f91cSConrad Meyer struct ioat_descriptor *desc); 67*e974f91cSConrad Meyer static struct ioat_descriptor * ioat_alloc_ring_entry(struct ioat_softc *ioat); 68*e974f91cSConrad Meyer static int ioat_reserve_space_and_lock(struct ioat_softc *ioat, int num_descs); 69*e974f91cSConrad Meyer static struct ioat_descriptor * ioat_get_ring_entry(struct ioat_softc *ioat, 70*e974f91cSConrad Meyer uint32_t index); 71*e974f91cSConrad Meyer static boolean_t resize_ring(struct ioat_softc *ioat, int order); 72*e974f91cSConrad Meyer static void ioat_timer_callback(void *arg); 73*e974f91cSConrad Meyer static void dump_descriptor(void *hw_desc); 74*e974f91cSConrad Meyer static void ioat_submit_single(struct ioat_softc *ioat); 75*e974f91cSConrad Meyer static void ioat_comp_update_map(void *arg, bus_dma_segment_t *seg, int nseg, 76*e974f91cSConrad Meyer int error); 77*e974f91cSConrad Meyer static int ioat_reset_hw(struct ioat_softc *ioat); 78*e974f91cSConrad Meyer static void ioat_setup_sysctl(device_t device); 79*e974f91cSConrad Meyer 80*e974f91cSConrad Meyer MALLOC_DEFINE(M_IOAT, "ioat", "ioat driver memory allocations"); 81*e974f91cSConrad Meyer SYSCTL_NODE(_hw, OID_AUTO, ioat, CTLFLAG_RD, 0, "ioat node"); 82*e974f91cSConrad Meyer 83*e974f91cSConrad Meyer static int g_force_legacy_interrupts; 84*e974f91cSConrad Meyer SYSCTL_INT(_hw_ioat, OID_AUTO, force_legacy_interrupts, CTLFLAG_RDTUN, 85*e974f91cSConrad Meyer &g_force_legacy_interrupts, 0, "Set to non-zero to force MSI-X disabled"); 86*e974f91cSConrad Meyer 87*e974f91cSConrad Meyer static int g_ioat_debug_level = 0; 88*e974f91cSConrad Meyer SYSCTL_INT(_hw_ioat, OID_AUTO, debug_level, CTLFLAG_RWTUN, &g_ioat_debug_level, 89*e974f91cSConrad Meyer 0, "Set log level (0-3) for ioat(4). Higher is more verbose."); 90*e974f91cSConrad Meyer 91*e974f91cSConrad Meyer /* 92*e974f91cSConrad Meyer * OS <-> Driver interface structures 93*e974f91cSConrad Meyer */ 94*e974f91cSConrad Meyer static device_method_t ioat_pci_methods[] = { 95*e974f91cSConrad Meyer /* Device interface */ 96*e974f91cSConrad Meyer DEVMETHOD(device_probe, ioat_probe), 97*e974f91cSConrad Meyer DEVMETHOD(device_attach, ioat_attach), 98*e974f91cSConrad Meyer DEVMETHOD(device_detach, ioat_detach), 99*e974f91cSConrad Meyer { 0, 0 } 100*e974f91cSConrad Meyer }; 101*e974f91cSConrad Meyer 102*e974f91cSConrad Meyer static driver_t ioat_pci_driver = { 103*e974f91cSConrad Meyer "ioat", 104*e974f91cSConrad Meyer ioat_pci_methods, 105*e974f91cSConrad Meyer sizeof(struct ioat_softc), 106*e974f91cSConrad Meyer }; 107*e974f91cSConrad Meyer 108*e974f91cSConrad Meyer static devclass_t ioat_devclass; 109*e974f91cSConrad Meyer DRIVER_MODULE(ioat, pci, ioat_pci_driver, ioat_devclass, 0, 0); 110*e974f91cSConrad Meyer 111*e974f91cSConrad Meyer /* 112*e974f91cSConrad Meyer * Private data structures 113*e974f91cSConrad Meyer */ 114*e974f91cSConrad Meyer static struct ioat_softc *ioat_channel[IOAT_MAX_CHANNELS]; 115*e974f91cSConrad Meyer static int ioat_channel_index = 0; 116*e974f91cSConrad Meyer SYSCTL_INT(_hw_ioat, OID_AUTO, channels, CTLFLAG_RD, &ioat_channel_index, 0, 117*e974f91cSConrad Meyer "Number of IOAT channels attached"); 118*e974f91cSConrad Meyer 119*e974f91cSConrad Meyer static struct _pcsid 120*e974f91cSConrad Meyer { 121*e974f91cSConrad Meyer u_int32_t type; 122*e974f91cSConrad Meyer const char *desc; 123*e974f91cSConrad Meyer } pci_ids[] = { 124*e974f91cSConrad Meyer { 0x34308086, "TBG IOAT Ch0" }, 125*e974f91cSConrad Meyer { 0x34318086, "TBG IOAT Ch1" }, 126*e974f91cSConrad Meyer { 0x34328086, "TBG IOAT Ch2" }, 127*e974f91cSConrad Meyer { 0x34338086, "TBG IOAT Ch3" }, 128*e974f91cSConrad Meyer { 0x34298086, "TBG IOAT Ch4" }, 129*e974f91cSConrad Meyer { 0x342a8086, "TBG IOAT Ch5" }, 130*e974f91cSConrad Meyer { 0x342b8086, "TBG IOAT Ch6" }, 131*e974f91cSConrad Meyer { 0x342c8086, "TBG IOAT Ch7" }, 132*e974f91cSConrad Meyer 133*e974f91cSConrad Meyer { 0x37108086, "JSF IOAT Ch0" }, 134*e974f91cSConrad Meyer { 0x37118086, "JSF IOAT Ch1" }, 135*e974f91cSConrad Meyer { 0x37128086, "JSF IOAT Ch2" }, 136*e974f91cSConrad Meyer { 0x37138086, "JSF IOAT Ch3" }, 137*e974f91cSConrad Meyer { 0x37148086, "JSF IOAT Ch4" }, 138*e974f91cSConrad Meyer { 0x37158086, "JSF IOAT Ch5" }, 139*e974f91cSConrad Meyer { 0x37168086, "JSF IOAT Ch6" }, 140*e974f91cSConrad Meyer { 0x37178086, "JSF IOAT Ch7" }, 141*e974f91cSConrad Meyer { 0x37188086, "JSF IOAT Ch0 (RAID)" }, 142*e974f91cSConrad Meyer { 0x37198086, "JSF IOAT Ch1 (RAID)" }, 143*e974f91cSConrad Meyer 144*e974f91cSConrad Meyer { 0x3c208086, "SNB IOAT Ch0" }, 145*e974f91cSConrad Meyer { 0x3c218086, "SNB IOAT Ch1" }, 146*e974f91cSConrad Meyer { 0x3c228086, "SNB IOAT Ch2" }, 147*e974f91cSConrad Meyer { 0x3c238086, "SNB IOAT Ch3" }, 148*e974f91cSConrad Meyer { 0x3c248086, "SNB IOAT Ch4" }, 149*e974f91cSConrad Meyer { 0x3c258086, "SNB IOAT Ch5" }, 150*e974f91cSConrad Meyer { 0x3c268086, "SNB IOAT Ch6" }, 151*e974f91cSConrad Meyer { 0x3c278086, "SNB IOAT Ch7" }, 152*e974f91cSConrad Meyer { 0x3c2e8086, "SNB IOAT Ch0 (RAID)" }, 153*e974f91cSConrad Meyer { 0x3c2f8086, "SNB IOAT Ch1 (RAID)" }, 154*e974f91cSConrad Meyer 155*e974f91cSConrad Meyer { 0x0e208086, "IVB IOAT Ch0" }, 156*e974f91cSConrad Meyer { 0x0e218086, "IVB IOAT Ch1" }, 157*e974f91cSConrad Meyer { 0x0e228086, "IVB IOAT Ch2" }, 158*e974f91cSConrad Meyer { 0x0e238086, "IVB IOAT Ch3" }, 159*e974f91cSConrad Meyer { 0x0e248086, "IVB IOAT Ch4" }, 160*e974f91cSConrad Meyer { 0x0e258086, "IVB IOAT Ch5" }, 161*e974f91cSConrad Meyer { 0x0e268086, "IVB IOAT Ch6" }, 162*e974f91cSConrad Meyer { 0x0e278086, "IVB IOAT Ch7" }, 163*e974f91cSConrad Meyer { 0x0e2e8086, "IVB IOAT Ch0 (RAID)" }, 164*e974f91cSConrad Meyer { 0x0e2f8086, "IVB IOAT Ch1 (RAID)" }, 165*e974f91cSConrad Meyer 166*e974f91cSConrad Meyer { 0x2f208086, "HSW IOAT Ch0" }, 167*e974f91cSConrad Meyer { 0x2f218086, "HSW IOAT Ch1" }, 168*e974f91cSConrad Meyer { 0x2f228086, "HSW IOAT Ch2" }, 169*e974f91cSConrad Meyer { 0x2f238086, "HSW IOAT Ch3" }, 170*e974f91cSConrad Meyer { 0x2f248086, "HSW IOAT Ch4" }, 171*e974f91cSConrad Meyer { 0x2f258086, "HSW IOAT Ch5" }, 172*e974f91cSConrad Meyer { 0x2f268086, "HSW IOAT Ch6" }, 173*e974f91cSConrad Meyer { 0x2f278086, "HSW IOAT Ch7" }, 174*e974f91cSConrad Meyer { 0x2f2e8086, "HSW IOAT Ch0 (RAID)" }, 175*e974f91cSConrad Meyer { 0x2f2f8086, "HSW IOAT Ch1 (RAID)" }, 176*e974f91cSConrad Meyer 177*e974f91cSConrad Meyer { 0x0c508086, "BWD IOAT Ch0" }, 178*e974f91cSConrad Meyer { 0x0c518086, "BWD IOAT Ch1" }, 179*e974f91cSConrad Meyer { 0x0c528086, "BWD IOAT Ch2" }, 180*e974f91cSConrad Meyer { 0x0c538086, "BWD IOAT Ch3" }, 181*e974f91cSConrad Meyer 182*e974f91cSConrad Meyer { 0x6f508086, "BDXDE IOAT Ch0" }, 183*e974f91cSConrad Meyer { 0x6f518086, "BDXDE IOAT Ch1" }, 184*e974f91cSConrad Meyer { 0x6f528086, "BDXDE IOAT Ch2" }, 185*e974f91cSConrad Meyer { 0x6f538086, "BDXDE IOAT Ch3" }, 186*e974f91cSConrad Meyer 187*e974f91cSConrad Meyer { 0x00000000, NULL } 188*e974f91cSConrad Meyer }; 189*e974f91cSConrad Meyer 190*e974f91cSConrad Meyer /* 191*e974f91cSConrad Meyer * OS <-> Driver linkage functions 192*e974f91cSConrad Meyer */ 193*e974f91cSConrad Meyer static int 194*e974f91cSConrad Meyer ioat_probe(device_t device) 195*e974f91cSConrad Meyer { 196*e974f91cSConrad Meyer struct _pcsid *ep; 197*e974f91cSConrad Meyer u_int32_t type; 198*e974f91cSConrad Meyer 199*e974f91cSConrad Meyer type = pci_get_devid(device); 200*e974f91cSConrad Meyer for (ep = pci_ids; ep->type; ep++) { 201*e974f91cSConrad Meyer if (ep->type == type) { 202*e974f91cSConrad Meyer device_set_desc(device, ep->desc); 203*e974f91cSConrad Meyer return (0); 204*e974f91cSConrad Meyer } 205*e974f91cSConrad Meyer } 206*e974f91cSConrad Meyer return (ENXIO); 207*e974f91cSConrad Meyer } 208*e974f91cSConrad Meyer 209*e974f91cSConrad Meyer static int 210*e974f91cSConrad Meyer ioat_attach(device_t device) 211*e974f91cSConrad Meyer { 212*e974f91cSConrad Meyer struct ioat_softc *ioat; 213*e974f91cSConrad Meyer int error; 214*e974f91cSConrad Meyer 215*e974f91cSConrad Meyer ioat = DEVICE2SOFTC(device); 216*e974f91cSConrad Meyer ioat->device = device; 217*e974f91cSConrad Meyer 218*e974f91cSConrad Meyer error = ioat_map_pci_bar(ioat); 219*e974f91cSConrad Meyer if (error != 0) 220*e974f91cSConrad Meyer goto err; 221*e974f91cSConrad Meyer 222*e974f91cSConrad Meyer ioat->version = ioat_read_cbver(ioat); 223*e974f91cSConrad Meyer ioat_interrupt_setup(ioat); 224*e974f91cSConrad Meyer 225*e974f91cSConrad Meyer if (ioat->version < IOAT_VER_3_0) { 226*e974f91cSConrad Meyer error = ENODEV; 227*e974f91cSConrad Meyer goto err; 228*e974f91cSConrad Meyer } 229*e974f91cSConrad Meyer 230*e974f91cSConrad Meyer error = ioat3_attach(device); 231*e974f91cSConrad Meyer if (error != 0) 232*e974f91cSConrad Meyer goto err; 233*e974f91cSConrad Meyer 234*e974f91cSConrad Meyer error = pci_enable_busmaster(device); 235*e974f91cSConrad Meyer if (error != 0) 236*e974f91cSConrad Meyer goto err; 237*e974f91cSConrad Meyer 238*e974f91cSConrad Meyer ioat_channel[ioat_channel_index++] = ioat; 239*e974f91cSConrad Meyer 240*e974f91cSConrad Meyer err: 241*e974f91cSConrad Meyer if (error != 0) 242*e974f91cSConrad Meyer ioat_detach(device); 243*e974f91cSConrad Meyer return (error); 244*e974f91cSConrad Meyer } 245*e974f91cSConrad Meyer 246*e974f91cSConrad Meyer static int 247*e974f91cSConrad Meyer ioat_detach(device_t device) 248*e974f91cSConrad Meyer { 249*e974f91cSConrad Meyer struct ioat_softc *ioat; 250*e974f91cSConrad Meyer uint32_t i; 251*e974f91cSConrad Meyer 252*e974f91cSConrad Meyer ioat = DEVICE2SOFTC(device); 253*e974f91cSConrad Meyer callout_drain(&ioat->timer); 254*e974f91cSConrad Meyer 255*e974f91cSConrad Meyer pci_disable_busmaster(device); 256*e974f91cSConrad Meyer 257*e974f91cSConrad Meyer if (ioat->pci_resource != NULL) 258*e974f91cSConrad Meyer bus_release_resource(device, SYS_RES_MEMORY, 259*e974f91cSConrad Meyer ioat->pci_resource_id, ioat->pci_resource); 260*e974f91cSConrad Meyer 261*e974f91cSConrad Meyer if (ioat->ring != NULL) { 262*e974f91cSConrad Meyer for (i = 0; i < (1 << ioat->ring_size_order); i++) 263*e974f91cSConrad Meyer ioat_free_ring_entry(ioat, ioat->ring[i]); 264*e974f91cSConrad Meyer free(ioat->ring, M_IOAT); 265*e974f91cSConrad Meyer } 266*e974f91cSConrad Meyer 267*e974f91cSConrad Meyer if (ioat->comp_update != NULL) { 268*e974f91cSConrad Meyer bus_dmamap_unload(ioat->comp_update_tag, ioat->comp_update_map); 269*e974f91cSConrad Meyer bus_dmamem_free(ioat->comp_update_tag, ioat->comp_update, 270*e974f91cSConrad Meyer ioat->comp_update_map); 271*e974f91cSConrad Meyer bus_dma_tag_destroy(ioat->comp_update_tag); 272*e974f91cSConrad Meyer } 273*e974f91cSConrad Meyer 274*e974f91cSConrad Meyer bus_dma_tag_destroy(ioat->hw_desc_tag); 275*e974f91cSConrad Meyer 276*e974f91cSConrad Meyer if (ioat->tag != NULL) 277*e974f91cSConrad Meyer bus_teardown_intr(device, ioat->res, ioat->tag); 278*e974f91cSConrad Meyer 279*e974f91cSConrad Meyer if (ioat->res != NULL) 280*e974f91cSConrad Meyer bus_release_resource(device, SYS_RES_IRQ, 281*e974f91cSConrad Meyer rman_get_rid(ioat->res), ioat->res); 282*e974f91cSConrad Meyer 283*e974f91cSConrad Meyer pci_release_msi(device); 284*e974f91cSConrad Meyer 285*e974f91cSConrad Meyer return (0); 286*e974f91cSConrad Meyer } 287*e974f91cSConrad Meyer 288*e974f91cSConrad Meyer static int 289*e974f91cSConrad Meyer ioat3_selftest(struct ioat_softc *ioat) 290*e974f91cSConrad Meyer { 291*e974f91cSConrad Meyer uint64_t status; 292*e974f91cSConrad Meyer uint32_t chanerr; 293*e974f91cSConrad Meyer int i; 294*e974f91cSConrad Meyer 295*e974f91cSConrad Meyer ioat_acquire(&ioat->dmaengine); 296*e974f91cSConrad Meyer ioat_null(&ioat->dmaengine, NULL, NULL, 0); 297*e974f91cSConrad Meyer ioat_release(&ioat->dmaengine); 298*e974f91cSConrad Meyer 299*e974f91cSConrad Meyer for (i = 0; i < 100; i++) { 300*e974f91cSConrad Meyer DELAY(1); 301*e974f91cSConrad Meyer status = ioat_get_chansts(ioat); 302*e974f91cSConrad Meyer if (is_ioat_idle(status)) 303*e974f91cSConrad Meyer return (0); 304*e974f91cSConrad Meyer } 305*e974f91cSConrad Meyer 306*e974f91cSConrad Meyer chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET); 307*e974f91cSConrad Meyer ioat_log_message(0, "could not start channel: " 308*e974f91cSConrad Meyer "status = %#jx error = %x\n", (uintmax_t)status, chanerr); 309*e974f91cSConrad Meyer return (ENXIO); 310*e974f91cSConrad Meyer } 311*e974f91cSConrad Meyer 312*e974f91cSConrad Meyer /* 313*e974f91cSConrad Meyer * Initialize Hardware 314*e974f91cSConrad Meyer */ 315*e974f91cSConrad Meyer static int 316*e974f91cSConrad Meyer ioat3_attach(device_t device) 317*e974f91cSConrad Meyer { 318*e974f91cSConrad Meyer struct ioat_softc *ioat; 319*e974f91cSConrad Meyer struct ioat_descriptor **ring; 320*e974f91cSConrad Meyer struct ioat_descriptor *next; 321*e974f91cSConrad Meyer struct ioat_dma_hw_descriptor *dma_hw_desc; 322*e974f91cSConrad Meyer uint32_t capabilities; 323*e974f91cSConrad Meyer int i, num_descriptors; 324*e974f91cSConrad Meyer int error; 325*e974f91cSConrad Meyer uint8_t xfercap; 326*e974f91cSConrad Meyer 327*e974f91cSConrad Meyer error = 0; 328*e974f91cSConrad Meyer ioat = DEVICE2SOFTC(device); 329*e974f91cSConrad Meyer capabilities = ioat_read_dmacapability(ioat); 330*e974f91cSConrad Meyer 331*e974f91cSConrad Meyer xfercap = ioat_read_xfercap(ioat); 332*e974f91cSConrad Meyer 333*e974f91cSConrad Meyer /* Only bits [4:0] are valid. */ 334*e974f91cSConrad Meyer xfercap &= 0x1f; 335*e974f91cSConrad Meyer ioat->max_xfer_size = 1 << xfercap; 336*e974f91cSConrad Meyer 337*e974f91cSConrad Meyer /* TODO: need to check DCA here if we ever do XOR/PQ */ 338*e974f91cSConrad Meyer 339*e974f91cSConrad Meyer mtx_init(&ioat->submit_lock, "ioat_submit", NULL, MTX_DEF); 340*e974f91cSConrad Meyer mtx_init(&ioat->cleanup_lock, "ioat_process_events", NULL, MTX_DEF); 341*e974f91cSConrad Meyer callout_init(&ioat->timer, CALLOUT_MPSAFE); 342*e974f91cSConrad Meyer 343*e974f91cSConrad Meyer ioat->is_resize_pending = FALSE; 344*e974f91cSConrad Meyer ioat->is_completion_pending = FALSE; 345*e974f91cSConrad Meyer ioat->is_reset_pending = FALSE; 346*e974f91cSConrad Meyer ioat->is_channel_running = FALSE; 347*e974f91cSConrad Meyer ioat->is_waiting_for_ack = FALSE; 348*e974f91cSConrad Meyer 349*e974f91cSConrad Meyer bus_dma_tag_create(bus_get_dma_tag(ioat->device), sizeof(uint64_t), 0x0, 350*e974f91cSConrad Meyer BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 351*e974f91cSConrad Meyer sizeof(uint64_t), 1, sizeof(uint64_t), 0, NULL, NULL, 352*e974f91cSConrad Meyer &ioat->comp_update_tag); 353*e974f91cSConrad Meyer 354*e974f91cSConrad Meyer error = bus_dmamem_alloc(ioat->comp_update_tag, 355*e974f91cSConrad Meyer (void **)&ioat->comp_update, BUS_DMA_ZERO, &ioat->comp_update_map); 356*e974f91cSConrad Meyer if (ioat->comp_update == NULL) 357*e974f91cSConrad Meyer return (ENOMEM); 358*e974f91cSConrad Meyer 359*e974f91cSConrad Meyer error = bus_dmamap_load(ioat->comp_update_tag, ioat->comp_update_map, 360*e974f91cSConrad Meyer ioat->comp_update, sizeof(uint64_t), ioat_comp_update_map, ioat, 361*e974f91cSConrad Meyer 0); 362*e974f91cSConrad Meyer if (error != 0) 363*e974f91cSConrad Meyer return (error); 364*e974f91cSConrad Meyer 365*e974f91cSConrad Meyer ioat->ring_size_order = IOAT_MIN_ORDER; 366*e974f91cSConrad Meyer 367*e974f91cSConrad Meyer num_descriptors = 1 << ioat->ring_size_order; 368*e974f91cSConrad Meyer 369*e974f91cSConrad Meyer bus_dma_tag_create(bus_get_dma_tag(ioat->device), 0x40, 0x0, 370*e974f91cSConrad Meyer BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 371*e974f91cSConrad Meyer sizeof(struct ioat_dma_hw_descriptor), 1, 372*e974f91cSConrad Meyer sizeof(struct ioat_dma_hw_descriptor), 0, NULL, NULL, 373*e974f91cSConrad Meyer &ioat->hw_desc_tag); 374*e974f91cSConrad Meyer 375*e974f91cSConrad Meyer ioat->ring = malloc(num_descriptors * sizeof(*ring), M_IOAT, 376*e974f91cSConrad Meyer M_ZERO | M_NOWAIT); 377*e974f91cSConrad Meyer if (ioat->ring == NULL) 378*e974f91cSConrad Meyer return (ENOMEM); 379*e974f91cSConrad Meyer 380*e974f91cSConrad Meyer ring = ioat->ring; 381*e974f91cSConrad Meyer for (i = 0; i < num_descriptors; i++) { 382*e974f91cSConrad Meyer ring[i] = ioat_alloc_ring_entry(ioat); 383*e974f91cSConrad Meyer if (ring[i] == NULL) 384*e974f91cSConrad Meyer return (ENOMEM); 385*e974f91cSConrad Meyer 386*e974f91cSConrad Meyer ring[i]->id = i; 387*e974f91cSConrad Meyer } 388*e974f91cSConrad Meyer 389*e974f91cSConrad Meyer for (i = 0; i < num_descriptors - 1; i++) { 390*e974f91cSConrad Meyer next = ring[i + 1]; 391*e974f91cSConrad Meyer dma_hw_desc = ring[i]->u.dma; 392*e974f91cSConrad Meyer 393*e974f91cSConrad Meyer dma_hw_desc->next = next->hw_desc_bus_addr; 394*e974f91cSConrad Meyer } 395*e974f91cSConrad Meyer 396*e974f91cSConrad Meyer ring[i]->u.dma->next = ring[0]->hw_desc_bus_addr; 397*e974f91cSConrad Meyer 398*e974f91cSConrad Meyer ioat->head = 0; 399*e974f91cSConrad Meyer ioat->tail = 0; 400*e974f91cSConrad Meyer ioat->last_seen = 0; 401*e974f91cSConrad Meyer 402*e974f91cSConrad Meyer error = ioat_reset_hw(ioat); 403*e974f91cSConrad Meyer if (error != 0) 404*e974f91cSConrad Meyer return (error); 405*e974f91cSConrad Meyer 406*e974f91cSConrad Meyer ioat_write_chanctrl(ioat, IOAT_CHANCTRL_RUN); 407*e974f91cSConrad Meyer ioat_write_chancmp(ioat, ioat->comp_update_bus_addr); 408*e974f91cSConrad Meyer ioat_write_chainaddr(ioat, ring[0]->hw_desc_bus_addr); 409*e974f91cSConrad Meyer 410*e974f91cSConrad Meyer error = ioat3_selftest(ioat); 411*e974f91cSConrad Meyer if (error != 0) 412*e974f91cSConrad Meyer return (error); 413*e974f91cSConrad Meyer 414*e974f91cSConrad Meyer ioat_process_events(ioat); 415*e974f91cSConrad Meyer ioat_setup_sysctl(device); 416*e974f91cSConrad Meyer return (0); 417*e974f91cSConrad Meyer } 418*e974f91cSConrad Meyer 419*e974f91cSConrad Meyer static int 420*e974f91cSConrad Meyer ioat_map_pci_bar(struct ioat_softc *ioat) 421*e974f91cSConrad Meyer { 422*e974f91cSConrad Meyer 423*e974f91cSConrad Meyer ioat->pci_resource_id = PCIR_BAR(0); 424*e974f91cSConrad Meyer ioat->pci_resource = bus_alloc_resource(ioat->device, SYS_RES_MEMORY, 425*e974f91cSConrad Meyer &ioat->pci_resource_id, 0, ~0, 1, RF_ACTIVE); 426*e974f91cSConrad Meyer 427*e974f91cSConrad Meyer if (ioat->pci_resource == NULL) { 428*e974f91cSConrad Meyer ioat_log_message(0, "unable to allocate pci resource\n"); 429*e974f91cSConrad Meyer return (ENODEV); 430*e974f91cSConrad Meyer } 431*e974f91cSConrad Meyer 432*e974f91cSConrad Meyer ioat->pci_bus_tag = rman_get_bustag(ioat->pci_resource); 433*e974f91cSConrad Meyer ioat->pci_bus_handle = rman_get_bushandle(ioat->pci_resource); 434*e974f91cSConrad Meyer return (0); 435*e974f91cSConrad Meyer } 436*e974f91cSConrad Meyer 437*e974f91cSConrad Meyer static void 438*e974f91cSConrad Meyer ioat_comp_update_map(void *arg, bus_dma_segment_t *seg, int nseg, int error) 439*e974f91cSConrad Meyer { 440*e974f91cSConrad Meyer struct ioat_softc *ioat = arg; 441*e974f91cSConrad Meyer 442*e974f91cSConrad Meyer ioat->comp_update_bus_addr = seg[0].ds_addr; 443*e974f91cSConrad Meyer } 444*e974f91cSConrad Meyer 445*e974f91cSConrad Meyer static void 446*e974f91cSConrad Meyer ioat_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 447*e974f91cSConrad Meyer { 448*e974f91cSConrad Meyer bus_addr_t *baddr; 449*e974f91cSConrad Meyer 450*e974f91cSConrad Meyer baddr = arg; 451*e974f91cSConrad Meyer *baddr = segs->ds_addr; 452*e974f91cSConrad Meyer } 453*e974f91cSConrad Meyer 454*e974f91cSConrad Meyer /* 455*e974f91cSConrad Meyer * Interrupt setup and handlers 456*e974f91cSConrad Meyer */ 457*e974f91cSConrad Meyer static int 458*e974f91cSConrad Meyer ioat_interrupt_setup(struct ioat_softc *ioat) 459*e974f91cSConrad Meyer { 460*e974f91cSConrad Meyer uint32_t num_vectors; 461*e974f91cSConrad Meyer int error; 462*e974f91cSConrad Meyer boolean_t use_msix; 463*e974f91cSConrad Meyer boolean_t force_legacy_interrupts; 464*e974f91cSConrad Meyer 465*e974f91cSConrad Meyer use_msix = FALSE; 466*e974f91cSConrad Meyer force_legacy_interrupts = FALSE; 467*e974f91cSConrad Meyer 468*e974f91cSConrad Meyer if (!g_force_legacy_interrupts && pci_msix_count(ioat->device) >= 1) { 469*e974f91cSConrad Meyer num_vectors = 1; 470*e974f91cSConrad Meyer pci_alloc_msix(ioat->device, &num_vectors); 471*e974f91cSConrad Meyer if (num_vectors == 1) 472*e974f91cSConrad Meyer use_msix = TRUE; 473*e974f91cSConrad Meyer } 474*e974f91cSConrad Meyer 475*e974f91cSConrad Meyer if (use_msix) { 476*e974f91cSConrad Meyer ioat->rid = 1; 477*e974f91cSConrad Meyer ioat->res = bus_alloc_resource_any(ioat->device, SYS_RES_IRQ, 478*e974f91cSConrad Meyer &ioat->rid, RF_ACTIVE); 479*e974f91cSConrad Meyer } else { 480*e974f91cSConrad Meyer ioat->rid = 0; 481*e974f91cSConrad Meyer ioat->res = bus_alloc_resource_any(ioat->device, SYS_RES_IRQ, 482*e974f91cSConrad Meyer &ioat->rid, RF_SHAREABLE | RF_ACTIVE); 483*e974f91cSConrad Meyer } 484*e974f91cSConrad Meyer if (ioat->res == NULL) { 485*e974f91cSConrad Meyer ioat_log_message(0, "bus_alloc_resource failed\n"); 486*e974f91cSConrad Meyer return (ENOMEM); 487*e974f91cSConrad Meyer } 488*e974f91cSConrad Meyer 489*e974f91cSConrad Meyer ioat->tag = NULL; 490*e974f91cSConrad Meyer error = bus_setup_intr(ioat->device, ioat->res, INTR_MPSAFE | 491*e974f91cSConrad Meyer INTR_TYPE_MISC, NULL, ioat_interrupt_handler, ioat, &ioat->tag); 492*e974f91cSConrad Meyer if (error != 0) { 493*e974f91cSConrad Meyer ioat_log_message(0, "bus_setup_intr failed\n"); 494*e974f91cSConrad Meyer return (error); 495*e974f91cSConrad Meyer } 496*e974f91cSConrad Meyer 497*e974f91cSConrad Meyer ioat_write_intrctrl(ioat, IOAT_INTRCTRL_MASTER_INT_EN); 498*e974f91cSConrad Meyer return (0); 499*e974f91cSConrad Meyer } 500*e974f91cSConrad Meyer 501*e974f91cSConrad Meyer static void 502*e974f91cSConrad Meyer ioat_interrupt_handler(void *arg) 503*e974f91cSConrad Meyer { 504*e974f91cSConrad Meyer struct ioat_softc *ioat = arg; 505*e974f91cSConrad Meyer 506*e974f91cSConrad Meyer ioat_process_events(ioat); 507*e974f91cSConrad Meyer } 508*e974f91cSConrad Meyer 509*e974f91cSConrad Meyer static void 510*e974f91cSConrad Meyer ioat_process_events(struct ioat_softc *ioat) 511*e974f91cSConrad Meyer { 512*e974f91cSConrad Meyer struct ioat_descriptor *desc; 513*e974f91cSConrad Meyer struct bus_dmadesc *dmadesc; 514*e974f91cSConrad Meyer uint64_t comp_update, status; 515*e974f91cSConrad Meyer uint32_t completed; 516*e974f91cSConrad Meyer 517*e974f91cSConrad Meyer mtx_lock(&ioat->cleanup_lock); 518*e974f91cSConrad Meyer 519*e974f91cSConrad Meyer completed = 0; 520*e974f91cSConrad Meyer comp_update = *ioat->comp_update; 521*e974f91cSConrad Meyer status = comp_update & IOAT_CHANSTS_COMPLETED_DESCRIPTOR_MASK; 522*e974f91cSConrad Meyer 523*e974f91cSConrad Meyer ioat_log_message(3, "%s\n", __func__); 524*e974f91cSConrad Meyer 525*e974f91cSConrad Meyer if (status == ioat->last_seen) { 526*e974f91cSConrad Meyer mtx_unlock(&ioat->cleanup_lock); 527*e974f91cSConrad Meyer return; 528*e974f91cSConrad Meyer } 529*e974f91cSConrad Meyer 530*e974f91cSConrad Meyer while (1) { 531*e974f91cSConrad Meyer desc = ioat_get_ring_entry(ioat, ioat->tail); 532*e974f91cSConrad Meyer dmadesc = &desc->bus_dmadesc; 533*e974f91cSConrad Meyer ioat_log_message(3, "completing desc %d\n", ioat->tail); 534*e974f91cSConrad Meyer 535*e974f91cSConrad Meyer if (dmadesc->callback_fn) 536*e974f91cSConrad Meyer (*dmadesc->callback_fn)(dmadesc->callback_arg); 537*e974f91cSConrad Meyer 538*e974f91cSConrad Meyer ioat->tail++; 539*e974f91cSConrad Meyer if (desc->hw_desc_bus_addr == status) 540*e974f91cSConrad Meyer break; 541*e974f91cSConrad Meyer } 542*e974f91cSConrad Meyer 543*e974f91cSConrad Meyer ioat->last_seen = desc->hw_desc_bus_addr; 544*e974f91cSConrad Meyer 545*e974f91cSConrad Meyer if (ioat->head == ioat->tail) { 546*e974f91cSConrad Meyer ioat->is_completion_pending = FALSE; 547*e974f91cSConrad Meyer callout_reset(&ioat->timer, 5 * hz, ioat_timer_callback, ioat); 548*e974f91cSConrad Meyer } 549*e974f91cSConrad Meyer 550*e974f91cSConrad Meyer ioat_write_chanctrl(ioat, IOAT_CHANCTRL_RUN); 551*e974f91cSConrad Meyer mtx_unlock(&ioat->cleanup_lock); 552*e974f91cSConrad Meyer } 553*e974f91cSConrad Meyer 554*e974f91cSConrad Meyer /* 555*e974f91cSConrad Meyer * User API functions 556*e974f91cSConrad Meyer */ 557*e974f91cSConrad Meyer bus_dmaengine_t 558*e974f91cSConrad Meyer ioat_get_dmaengine(uint32_t index) 559*e974f91cSConrad Meyer { 560*e974f91cSConrad Meyer 561*e974f91cSConrad Meyer if (index < ioat_channel_index) 562*e974f91cSConrad Meyer return (&ioat_channel[index]->dmaengine); 563*e974f91cSConrad Meyer return (NULL); 564*e974f91cSConrad Meyer } 565*e974f91cSConrad Meyer 566*e974f91cSConrad Meyer void 567*e974f91cSConrad Meyer ioat_acquire(bus_dmaengine_t dmaengine) 568*e974f91cSConrad Meyer { 569*e974f91cSConrad Meyer struct ioat_softc *ioat; 570*e974f91cSConrad Meyer 571*e974f91cSConrad Meyer ioat = to_ioat_softc(dmaengine); 572*e974f91cSConrad Meyer mtx_lock(&ioat->submit_lock); 573*e974f91cSConrad Meyer ioat_log_message(3, "%s\n", __func__); 574*e974f91cSConrad Meyer } 575*e974f91cSConrad Meyer 576*e974f91cSConrad Meyer void 577*e974f91cSConrad Meyer ioat_release(bus_dmaengine_t dmaengine) 578*e974f91cSConrad Meyer { 579*e974f91cSConrad Meyer struct ioat_softc *ioat; 580*e974f91cSConrad Meyer 581*e974f91cSConrad Meyer ioat_log_message(3, "%s\n", __func__); 582*e974f91cSConrad Meyer ioat = to_ioat_softc(dmaengine); 583*e974f91cSConrad Meyer ioat_write_2(ioat, IOAT_DMACOUNT_OFFSET, (uint16_t)ioat->head); 584*e974f91cSConrad Meyer mtx_unlock(&ioat->submit_lock); 585*e974f91cSConrad Meyer } 586*e974f91cSConrad Meyer 587*e974f91cSConrad Meyer struct bus_dmadesc * 588*e974f91cSConrad Meyer ioat_null(bus_dmaengine_t dmaengine, bus_dmaengine_callback_t callback_fn, 589*e974f91cSConrad Meyer void *callback_arg, uint32_t flags) 590*e974f91cSConrad Meyer { 591*e974f91cSConrad Meyer struct ioat_softc *ioat; 592*e974f91cSConrad Meyer struct ioat_descriptor *desc; 593*e974f91cSConrad Meyer struct ioat_dma_hw_descriptor *hw_desc; 594*e974f91cSConrad Meyer 595*e974f91cSConrad Meyer KASSERT((flags & ~DMA_ALL_FLAGS) == 0, ("Unrecognized flag(s): %#x", 596*e974f91cSConrad Meyer flags & ~DMA_ALL_FLAGS)); 597*e974f91cSConrad Meyer 598*e974f91cSConrad Meyer ioat = to_ioat_softc(dmaengine); 599*e974f91cSConrad Meyer 600*e974f91cSConrad Meyer if (ioat_reserve_space_and_lock(ioat, 1) != 0) 601*e974f91cSConrad Meyer return (NULL); 602*e974f91cSConrad Meyer 603*e974f91cSConrad Meyer ioat_log_message(3, "%s\n", __func__); 604*e974f91cSConrad Meyer 605*e974f91cSConrad Meyer desc = ioat_get_ring_entry(ioat, ioat->head); 606*e974f91cSConrad Meyer hw_desc = desc->u.dma; 607*e974f91cSConrad Meyer 608*e974f91cSConrad Meyer hw_desc->u.control_raw = 0; 609*e974f91cSConrad Meyer hw_desc->u.control.null = 1; 610*e974f91cSConrad Meyer hw_desc->u.control.completion_update = 1; 611*e974f91cSConrad Meyer 612*e974f91cSConrad Meyer if ((flags & DMA_INT_EN) != 0) 613*e974f91cSConrad Meyer hw_desc->u.control.int_enable = 1; 614*e974f91cSConrad Meyer 615*e974f91cSConrad Meyer hw_desc->size = 8; 616*e974f91cSConrad Meyer hw_desc->src_addr = 0; 617*e974f91cSConrad Meyer hw_desc->dest_addr = 0; 618*e974f91cSConrad Meyer 619*e974f91cSConrad Meyer desc->bus_dmadesc.callback_fn = callback_fn; 620*e974f91cSConrad Meyer desc->bus_dmadesc.callback_arg = callback_arg; 621*e974f91cSConrad Meyer 622*e974f91cSConrad Meyer ioat_submit_single(ioat); 623*e974f91cSConrad Meyer return (&desc->bus_dmadesc); 624*e974f91cSConrad Meyer } 625*e974f91cSConrad Meyer 626*e974f91cSConrad Meyer struct bus_dmadesc * 627*e974f91cSConrad Meyer ioat_copy(bus_dmaengine_t dmaengine, bus_addr_t dst, 628*e974f91cSConrad Meyer bus_addr_t src, bus_size_t len, bus_dmaengine_callback_t callback_fn, 629*e974f91cSConrad Meyer void *callback_arg, uint32_t flags) 630*e974f91cSConrad Meyer { 631*e974f91cSConrad Meyer struct ioat_descriptor *desc; 632*e974f91cSConrad Meyer struct ioat_dma_hw_descriptor *hw_desc; 633*e974f91cSConrad Meyer struct ioat_softc *ioat; 634*e974f91cSConrad Meyer 635*e974f91cSConrad Meyer KASSERT((flags & ~DMA_ALL_FLAGS) == 0, ("Unrecognized flag(s): %#x", 636*e974f91cSConrad Meyer flags & ~DMA_ALL_FLAGS)); 637*e974f91cSConrad Meyer 638*e974f91cSConrad Meyer ioat = to_ioat_softc(dmaengine); 639*e974f91cSConrad Meyer 640*e974f91cSConrad Meyer if (len > ioat->max_xfer_size) { 641*e974f91cSConrad Meyer ioat_log_message(0, "%s: max_xfer_size = %d, requested = %d\n", 642*e974f91cSConrad Meyer __func__, ioat->max_xfer_size, (int)len); 643*e974f91cSConrad Meyer return (NULL); 644*e974f91cSConrad Meyer } 645*e974f91cSConrad Meyer 646*e974f91cSConrad Meyer if (ioat_reserve_space_and_lock(ioat, 1) != 0) 647*e974f91cSConrad Meyer return (NULL); 648*e974f91cSConrad Meyer 649*e974f91cSConrad Meyer ioat_log_message(3, "%s\n", __func__); 650*e974f91cSConrad Meyer 651*e974f91cSConrad Meyer desc = ioat_get_ring_entry(ioat, ioat->head); 652*e974f91cSConrad Meyer hw_desc = desc->u.dma; 653*e974f91cSConrad Meyer 654*e974f91cSConrad Meyer hw_desc->u.control_raw = 0; 655*e974f91cSConrad Meyer hw_desc->u.control.completion_update = 1; 656*e974f91cSConrad Meyer 657*e974f91cSConrad Meyer if ((flags & DMA_INT_EN) != 0) 658*e974f91cSConrad Meyer hw_desc->u.control.int_enable = 1; 659*e974f91cSConrad Meyer 660*e974f91cSConrad Meyer hw_desc->size = len; 661*e974f91cSConrad Meyer hw_desc->src_addr = src; 662*e974f91cSConrad Meyer hw_desc->dest_addr = dst; 663*e974f91cSConrad Meyer 664*e974f91cSConrad Meyer if (g_ioat_debug_level >= 3) 665*e974f91cSConrad Meyer dump_descriptor(hw_desc); 666*e974f91cSConrad Meyer 667*e974f91cSConrad Meyer desc->bus_dmadesc.callback_fn = callback_fn; 668*e974f91cSConrad Meyer desc->bus_dmadesc.callback_arg = callback_arg; 669*e974f91cSConrad Meyer 670*e974f91cSConrad Meyer ioat_submit_single(ioat); 671*e974f91cSConrad Meyer return (&desc->bus_dmadesc); 672*e974f91cSConrad Meyer } 673*e974f91cSConrad Meyer 674*e974f91cSConrad Meyer /* 675*e974f91cSConrad Meyer * Ring Management 676*e974f91cSConrad Meyer */ 677*e974f91cSConrad Meyer static inline uint32_t 678*e974f91cSConrad Meyer ioat_get_active(struct ioat_softc *ioat) 679*e974f91cSConrad Meyer { 680*e974f91cSConrad Meyer 681*e974f91cSConrad Meyer return ((ioat->head - ioat->tail) & ((1 << ioat->ring_size_order) - 1)); 682*e974f91cSConrad Meyer } 683*e974f91cSConrad Meyer 684*e974f91cSConrad Meyer static inline uint32_t 685*e974f91cSConrad Meyer ioat_get_ring_space(struct ioat_softc *ioat) 686*e974f91cSConrad Meyer { 687*e974f91cSConrad Meyer 688*e974f91cSConrad Meyer return ((1 << ioat->ring_size_order) - ioat_get_active(ioat) - 1); 689*e974f91cSConrad Meyer } 690*e974f91cSConrad Meyer 691*e974f91cSConrad Meyer static struct ioat_descriptor * 692*e974f91cSConrad Meyer ioat_alloc_ring_entry(struct ioat_softc *ioat) 693*e974f91cSConrad Meyer { 694*e974f91cSConrad Meyer struct ioat_dma_hw_descriptor *hw_desc; 695*e974f91cSConrad Meyer struct ioat_descriptor *desc; 696*e974f91cSConrad Meyer 697*e974f91cSConrad Meyer desc = malloc(sizeof(struct ioat_descriptor), M_IOAT, M_NOWAIT); 698*e974f91cSConrad Meyer if (desc == NULL) 699*e974f91cSConrad Meyer return (NULL); 700*e974f91cSConrad Meyer 701*e974f91cSConrad Meyer bus_dmamem_alloc(ioat->hw_desc_tag, (void **)&hw_desc, BUS_DMA_ZERO, 702*e974f91cSConrad Meyer &ioat->hw_desc_map); 703*e974f91cSConrad Meyer if (hw_desc == NULL) { 704*e974f91cSConrad Meyer free(desc, M_IOAT); 705*e974f91cSConrad Meyer return (NULL); 706*e974f91cSConrad Meyer } 707*e974f91cSConrad Meyer 708*e974f91cSConrad Meyer bus_dmamap_load(ioat->hw_desc_tag, ioat->hw_desc_map, hw_desc, 709*e974f91cSConrad Meyer sizeof(*hw_desc), ioat_dmamap_cb, &desc->hw_desc_bus_addr, 0); 710*e974f91cSConrad Meyer 711*e974f91cSConrad Meyer desc->u.dma = hw_desc; 712*e974f91cSConrad Meyer return (desc); 713*e974f91cSConrad Meyer } 714*e974f91cSConrad Meyer 715*e974f91cSConrad Meyer static void 716*e974f91cSConrad Meyer ioat_free_ring_entry(struct ioat_softc *ioat, struct ioat_descriptor *desc) 717*e974f91cSConrad Meyer { 718*e974f91cSConrad Meyer 719*e974f91cSConrad Meyer if (desc == NULL) 720*e974f91cSConrad Meyer return; 721*e974f91cSConrad Meyer 722*e974f91cSConrad Meyer if (desc->u.dma) 723*e974f91cSConrad Meyer bus_dmamem_free(ioat->hw_desc_tag, desc->u.dma, 724*e974f91cSConrad Meyer ioat->hw_desc_map); 725*e974f91cSConrad Meyer free(desc, M_IOAT); 726*e974f91cSConrad Meyer } 727*e974f91cSConrad Meyer 728*e974f91cSConrad Meyer static int 729*e974f91cSConrad Meyer ioat_reserve_space_and_lock(struct ioat_softc *ioat, int num_descs) 730*e974f91cSConrad Meyer { 731*e974f91cSConrad Meyer boolean_t retry; 732*e974f91cSConrad Meyer 733*e974f91cSConrad Meyer while (1) { 734*e974f91cSConrad Meyer if (ioat_get_ring_space(ioat) >= num_descs) 735*e974f91cSConrad Meyer return (0); 736*e974f91cSConrad Meyer 737*e974f91cSConrad Meyer mtx_lock(&ioat->cleanup_lock); 738*e974f91cSConrad Meyer retry = resize_ring(ioat, ioat->ring_size_order + 1); 739*e974f91cSConrad Meyer mtx_unlock(&ioat->cleanup_lock); 740*e974f91cSConrad Meyer 741*e974f91cSConrad Meyer if (!retry) 742*e974f91cSConrad Meyer return (ENOMEM); 743*e974f91cSConrad Meyer } 744*e974f91cSConrad Meyer } 745*e974f91cSConrad Meyer 746*e974f91cSConrad Meyer static struct ioat_descriptor * 747*e974f91cSConrad Meyer ioat_get_ring_entry(struct ioat_softc *ioat, uint32_t index) 748*e974f91cSConrad Meyer { 749*e974f91cSConrad Meyer 750*e974f91cSConrad Meyer return (ioat->ring[index % (1 << ioat->ring_size_order)]); 751*e974f91cSConrad Meyer } 752*e974f91cSConrad Meyer 753*e974f91cSConrad Meyer static boolean_t 754*e974f91cSConrad Meyer resize_ring(struct ioat_softc *ioat, int order) 755*e974f91cSConrad Meyer { 756*e974f91cSConrad Meyer struct ioat_descriptor **ring; 757*e974f91cSConrad Meyer struct ioat_descriptor *next; 758*e974f91cSConrad Meyer struct ioat_dma_hw_descriptor *hw; 759*e974f91cSConrad Meyer struct ioat_descriptor *ent; 760*e974f91cSConrad Meyer uint32_t current_size, active, new_size, i, new_idx, current_idx; 761*e974f91cSConrad Meyer uint32_t new_idx2; 762*e974f91cSConrad Meyer 763*e974f91cSConrad Meyer current_size = 1 << ioat->ring_size_order; 764*e974f91cSConrad Meyer active = (ioat->head - ioat->tail) & (current_size - 1); 765*e974f91cSConrad Meyer new_size = 1 << order; 766*e974f91cSConrad Meyer 767*e974f91cSConrad Meyer if (order > IOAT_MAX_ORDER) 768*e974f91cSConrad Meyer return (FALSE); 769*e974f91cSConrad Meyer 770*e974f91cSConrad Meyer /* 771*e974f91cSConrad Meyer * when shrinking, verify that we can hold the current active 772*e974f91cSConrad Meyer * set in the new ring 773*e974f91cSConrad Meyer */ 774*e974f91cSConrad Meyer if (active >= new_size) 775*e974f91cSConrad Meyer return (FALSE); 776*e974f91cSConrad Meyer 777*e974f91cSConrad Meyer /* allocate the array to hold the software ring */ 778*e974f91cSConrad Meyer ring = malloc(new_size * sizeof(*ring), M_IOAT, M_ZERO | M_NOWAIT); 779*e974f91cSConrad Meyer if (ring == NULL) 780*e974f91cSConrad Meyer return (FALSE); 781*e974f91cSConrad Meyer 782*e974f91cSConrad Meyer ioat_log_message(2, "ring resize: new: %d old: %d\n", 783*e974f91cSConrad Meyer new_size, current_size); 784*e974f91cSConrad Meyer 785*e974f91cSConrad Meyer /* allocate/trim descriptors as needed */ 786*e974f91cSConrad Meyer if (new_size > current_size) { 787*e974f91cSConrad Meyer /* copy current descriptors to the new ring */ 788*e974f91cSConrad Meyer for (i = 0; i < current_size; i++) { 789*e974f91cSConrad Meyer current_idx = (ioat->tail + i) & (current_size - 1); 790*e974f91cSConrad Meyer new_idx = (ioat->tail + i) & (new_size - 1); 791*e974f91cSConrad Meyer 792*e974f91cSConrad Meyer ring[new_idx] = ioat->ring[current_idx]; 793*e974f91cSConrad Meyer ring[new_idx]->id = new_idx; 794*e974f91cSConrad Meyer } 795*e974f91cSConrad Meyer 796*e974f91cSConrad Meyer /* add new descriptors to the ring */ 797*e974f91cSConrad Meyer for (i = current_size; i < new_size; i++) { 798*e974f91cSConrad Meyer new_idx = (ioat->tail + i) & (new_size - 1); 799*e974f91cSConrad Meyer 800*e974f91cSConrad Meyer ring[new_idx] = ioat_alloc_ring_entry(ioat); 801*e974f91cSConrad Meyer if (!ring[new_idx]) { 802*e974f91cSConrad Meyer while (i--) { 803*e974f91cSConrad Meyer new_idx2 = (ioat->tail + i) & 804*e974f91cSConrad Meyer (new_size - 1); 805*e974f91cSConrad Meyer 806*e974f91cSConrad Meyer ioat_free_ring_entry(ioat, 807*e974f91cSConrad Meyer ring[new_idx2]); 808*e974f91cSConrad Meyer } 809*e974f91cSConrad Meyer free(ring, M_IOAT); 810*e974f91cSConrad Meyer return (FALSE); 811*e974f91cSConrad Meyer } 812*e974f91cSConrad Meyer ring[new_idx]->id = new_idx; 813*e974f91cSConrad Meyer } 814*e974f91cSConrad Meyer 815*e974f91cSConrad Meyer for (i = current_size - 1; i < new_size; i++) { 816*e974f91cSConrad Meyer new_idx = (ioat->tail + i) & (new_size - 1); 817*e974f91cSConrad Meyer next = ring[(new_idx + 1) & (new_size - 1)]; 818*e974f91cSConrad Meyer hw = ring[new_idx]->u.dma; 819*e974f91cSConrad Meyer 820*e974f91cSConrad Meyer hw->next = next->hw_desc_bus_addr; 821*e974f91cSConrad Meyer } 822*e974f91cSConrad Meyer } else { 823*e974f91cSConrad Meyer /* 824*e974f91cSConrad Meyer * copy current descriptors to the new ring, dropping the 825*e974f91cSConrad Meyer * removed descriptors 826*e974f91cSConrad Meyer */ 827*e974f91cSConrad Meyer for (i = 0; i < new_size; i++) { 828*e974f91cSConrad Meyer current_idx = (ioat->tail + i) & (current_size - 1); 829*e974f91cSConrad Meyer new_idx = (ioat->tail + i) & (new_size - 1); 830*e974f91cSConrad Meyer 831*e974f91cSConrad Meyer ring[new_idx] = ioat->ring[current_idx]; 832*e974f91cSConrad Meyer ring[new_idx]->id = new_idx; 833*e974f91cSConrad Meyer } 834*e974f91cSConrad Meyer 835*e974f91cSConrad Meyer /* free deleted descriptors */ 836*e974f91cSConrad Meyer for (i = new_size; i < current_size; i++) { 837*e974f91cSConrad Meyer ent = ioat_get_ring_entry(ioat, ioat->tail + i); 838*e974f91cSConrad Meyer ioat_free_ring_entry(ioat, ent); 839*e974f91cSConrad Meyer } 840*e974f91cSConrad Meyer 841*e974f91cSConrad Meyer /* fix up hardware ring */ 842*e974f91cSConrad Meyer hw = ring[(ioat->tail + new_size - 1) & (new_size - 1)]->u.dma; 843*e974f91cSConrad Meyer next = ring[(ioat->tail + new_size) & (new_size - 1)]; 844*e974f91cSConrad Meyer hw->next = next->hw_desc_bus_addr; 845*e974f91cSConrad Meyer } 846*e974f91cSConrad Meyer 847*e974f91cSConrad Meyer free(ioat->ring, M_IOAT); 848*e974f91cSConrad Meyer ioat->ring = ring; 849*e974f91cSConrad Meyer ioat->ring_size_order = order; 850*e974f91cSConrad Meyer 851*e974f91cSConrad Meyer return (TRUE); 852*e974f91cSConrad Meyer } 853*e974f91cSConrad Meyer 854*e974f91cSConrad Meyer static void 855*e974f91cSConrad Meyer ioat_timer_callback(void *arg) 856*e974f91cSConrad Meyer { 857*e974f91cSConrad Meyer struct ioat_descriptor *desc; 858*e974f91cSConrad Meyer struct ioat_softc *ioat; 859*e974f91cSConrad Meyer uint64_t status; 860*e974f91cSConrad Meyer uint32_t chanerr; 861*e974f91cSConrad Meyer 862*e974f91cSConrad Meyer ioat = arg; 863*e974f91cSConrad Meyer ioat_log_message(2, "%s\n", __func__); 864*e974f91cSConrad Meyer 865*e974f91cSConrad Meyer if (ioat->is_completion_pending) { 866*e974f91cSConrad Meyer status = ioat_get_chansts(ioat); 867*e974f91cSConrad Meyer 868*e974f91cSConrad Meyer /* 869*e974f91cSConrad Meyer * When halted due to errors, check for channel programming 870*e974f91cSConrad Meyer * errors before advancing the completion state. 871*e974f91cSConrad Meyer */ 872*e974f91cSConrad Meyer if (is_ioat_halted(status)) { 873*e974f91cSConrad Meyer chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET); 874*e974f91cSConrad Meyer ioat_log_message(0, "Channel halted (%x)\n", chanerr); 875*e974f91cSConrad Meyer 876*e974f91cSConrad Meyer desc = ioat_get_ring_entry(ioat, ioat->tail + 0); 877*e974f91cSConrad Meyer dump_descriptor(desc->u.raw); 878*e974f91cSConrad Meyer 879*e974f91cSConrad Meyer desc = ioat_get_ring_entry(ioat, ioat->tail + 1); 880*e974f91cSConrad Meyer dump_descriptor(desc->u.raw); 881*e974f91cSConrad Meyer } 882*e974f91cSConrad Meyer ioat_process_events(ioat); 883*e974f91cSConrad Meyer } else { 884*e974f91cSConrad Meyer mtx_lock(&ioat->submit_lock); 885*e974f91cSConrad Meyer mtx_lock(&ioat->cleanup_lock); 886*e974f91cSConrad Meyer 887*e974f91cSConrad Meyer if (ioat_get_active(ioat) == 0 && 888*e974f91cSConrad Meyer ioat->ring_size_order > IOAT_MIN_ORDER) 889*e974f91cSConrad Meyer resize_ring(ioat, ioat->ring_size_order - 1); 890*e974f91cSConrad Meyer 891*e974f91cSConrad Meyer mtx_unlock(&ioat->cleanup_lock); 892*e974f91cSConrad Meyer mtx_unlock(&ioat->submit_lock); 893*e974f91cSConrad Meyer 894*e974f91cSConrad Meyer if (ioat->ring_size_order > IOAT_MIN_ORDER) 895*e974f91cSConrad Meyer callout_reset(&ioat->timer, 5 * hz, 896*e974f91cSConrad Meyer ioat_timer_callback, ioat); 897*e974f91cSConrad Meyer } 898*e974f91cSConrad Meyer } 899*e974f91cSConrad Meyer 900*e974f91cSConrad Meyer /* 901*e974f91cSConrad Meyer * Support Functions 902*e974f91cSConrad Meyer */ 903*e974f91cSConrad Meyer static void 904*e974f91cSConrad Meyer ioat_submit_single(struct ioat_softc *ioat) 905*e974f91cSConrad Meyer { 906*e974f91cSConrad Meyer 907*e974f91cSConrad Meyer atomic_add_rel_int(&ioat->head, 1); 908*e974f91cSConrad Meyer 909*e974f91cSConrad Meyer if (!ioat->is_completion_pending) { 910*e974f91cSConrad Meyer ioat->is_completion_pending = TRUE; 911*e974f91cSConrad Meyer callout_reset(&ioat->timer, 10 * hz, ioat_timer_callback, 912*e974f91cSConrad Meyer ioat); 913*e974f91cSConrad Meyer } 914*e974f91cSConrad Meyer } 915*e974f91cSConrad Meyer 916*e974f91cSConrad Meyer static int 917*e974f91cSConrad Meyer ioat_reset_hw(struct ioat_softc *ioat) 918*e974f91cSConrad Meyer { 919*e974f91cSConrad Meyer uint64_t status; 920*e974f91cSConrad Meyer uint32_t chanerr; 921*e974f91cSConrad Meyer int timeout; 922*e974f91cSConrad Meyer 923*e974f91cSConrad Meyer status = ioat_get_chansts(ioat); 924*e974f91cSConrad Meyer if (is_ioat_active(status) || is_ioat_idle(status)) 925*e974f91cSConrad Meyer ioat_suspend(ioat); 926*e974f91cSConrad Meyer 927*e974f91cSConrad Meyer /* Wait at most 20 ms */ 928*e974f91cSConrad Meyer for (timeout = 0; (is_ioat_active(status) || is_ioat_idle(status)) && 929*e974f91cSConrad Meyer timeout < 20; timeout++) { 930*e974f91cSConrad Meyer DELAY(1000); 931*e974f91cSConrad Meyer status = ioat_get_chansts(ioat); 932*e974f91cSConrad Meyer } 933*e974f91cSConrad Meyer if (timeout == 20) 934*e974f91cSConrad Meyer return (ETIMEDOUT); 935*e974f91cSConrad Meyer 936*e974f91cSConrad Meyer chanerr = ioat_read_4(ioat, IOAT_CHANERR_OFFSET); 937*e974f91cSConrad Meyer ioat_write_4(ioat, IOAT_CHANERR_OFFSET, chanerr); 938*e974f91cSConrad Meyer 939*e974f91cSConrad Meyer /* 940*e974f91cSConrad Meyer * IOAT v3 workaround - CHANERRMSK_INT with 3E07h to masks out errors 941*e974f91cSConrad Meyer * that can cause stability issues for IOAT v3. 942*e974f91cSConrad Meyer */ 943*e974f91cSConrad Meyer pci_write_config(ioat->device, IOAT_CFG_CHANERRMASK_INT_OFFSET, 0x3e07, 944*e974f91cSConrad Meyer 4); 945*e974f91cSConrad Meyer chanerr = pci_read_config(ioat->device, IOAT_CFG_CHANERR_INT_OFFSET, 4); 946*e974f91cSConrad Meyer pci_write_config(ioat->device, IOAT_CFG_CHANERR_INT_OFFSET, chanerr, 4); 947*e974f91cSConrad Meyer 948*e974f91cSConrad Meyer ioat_reset(ioat); 949*e974f91cSConrad Meyer 950*e974f91cSConrad Meyer /* Wait at most 20 ms */ 951*e974f91cSConrad Meyer for (timeout = 0; ioat_reset_pending(ioat) && timeout < 20; timeout++) 952*e974f91cSConrad Meyer DELAY(1000); 953*e974f91cSConrad Meyer if (timeout == 20) 954*e974f91cSConrad Meyer return (ETIMEDOUT); 955*e974f91cSConrad Meyer 956*e974f91cSConrad Meyer return (0); 957*e974f91cSConrad Meyer } 958*e974f91cSConrad Meyer 959*e974f91cSConrad Meyer static void 960*e974f91cSConrad Meyer dump_descriptor(void *hw_desc) 961*e974f91cSConrad Meyer { 962*e974f91cSConrad Meyer int i, j; 963*e974f91cSConrad Meyer 964*e974f91cSConrad Meyer for (i = 0; i < 2; i++) { 965*e974f91cSConrad Meyer for (j = 0; j < 8; j++) 966*e974f91cSConrad Meyer printf("%08x ", ((uint32_t *)hw_desc)[i * 8 + j]); 967*e974f91cSConrad Meyer printf("\n"); 968*e974f91cSConrad Meyer } 969*e974f91cSConrad Meyer } 970*e974f91cSConrad Meyer 971*e974f91cSConrad Meyer static void 972*e974f91cSConrad Meyer ioat_setup_sysctl(device_t device) 973*e974f91cSConrad Meyer { 974*e974f91cSConrad Meyer struct sysctl_ctx_list *sysctl_ctx; 975*e974f91cSConrad Meyer struct sysctl_oid *sysctl_tree; 976*e974f91cSConrad Meyer struct ioat_softc *ioat; 977*e974f91cSConrad Meyer 978*e974f91cSConrad Meyer ioat = DEVICE2SOFTC(device); 979*e974f91cSConrad Meyer sysctl_ctx = device_get_sysctl_ctx(device); 980*e974f91cSConrad Meyer sysctl_tree = device_get_sysctl_tree(device); 981*e974f91cSConrad Meyer 982*e974f91cSConrad Meyer SYSCTL_ADD_UINT(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO, 983*e974f91cSConrad Meyer "ring_size_order", CTLFLAG_RD, &ioat->ring_size_order, 984*e974f91cSConrad Meyer 0, "HW descriptor ring size order"); 985*e974f91cSConrad Meyer SYSCTL_ADD_UINT(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO, 986*e974f91cSConrad Meyer "head", CTLFLAG_RD, &ioat->head, 987*e974f91cSConrad Meyer 0, "HW descriptor head pointer index"); 988*e974f91cSConrad Meyer SYSCTL_ADD_UINT(sysctl_ctx, SYSCTL_CHILDREN(sysctl_tree), OID_AUTO, 989*e974f91cSConrad Meyer "tail", CTLFLAG_RD, &ioat->tail, 990*e974f91cSConrad Meyer 0, "HW descriptor tail pointer index"); 991*e974f91cSConrad Meyer } 992*e974f91cSConrad Meyer 993*e974f91cSConrad Meyer void 994*e974f91cSConrad Meyer ioat_log_message(int verbosity, char *fmt, ...) 995*e974f91cSConrad Meyer { 996*e974f91cSConrad Meyer va_list argp; 997*e974f91cSConrad Meyer char buffer[512]; 998*e974f91cSConrad Meyer struct timeval tv; 999*e974f91cSConrad Meyer 1000*e974f91cSConrad Meyer if (verbosity > g_ioat_debug_level) 1001*e974f91cSConrad Meyer return; 1002*e974f91cSConrad Meyer 1003*e974f91cSConrad Meyer va_start(argp, fmt); 1004*e974f91cSConrad Meyer vsnprintf(buffer, sizeof(buffer) - 1, fmt, argp); 1005*e974f91cSConrad Meyer va_end(argp); 1006*e974f91cSConrad Meyer microuptime(&tv); 1007*e974f91cSConrad Meyer 1008*e974f91cSConrad Meyer printf("[%d:%06d] ioat: %s", (int)tv.tv_sec, (int)tv.tv_usec, buffer); 1009*e974f91cSConrad Meyer } 1010