/* * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved. * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include #include #include #include "ipath_kernel.h" #include "ipath_common.h" /* * min buffers we want to have per port, after driver */ #define IPATH_MIN_USER_PORT_BUFCNT 8 /* * Number of ports we are configured to use (to allow for more pio * buffers per port, etc.) Zero means use chip value. */ static ushort ipath_cfgports; module_param_named(cfgports, ipath_cfgports, ushort, S_IRUGO); MODULE_PARM_DESC(cfgports, "Set max number of ports to use"); /* * Number of buffers reserved for driver (verbs and layered drivers.) * Reserved at end of buffer list. Initialized based on * number of PIO buffers if not set via module interface. * The problem with this is that it's global, but we'll use different * numbers for different chip types. So the default value is not * very useful. I've redefined it for the 1.3 release so that it's * zero unless set by the user to something else, in which case we * try to respect it. */ static ushort ipath_kpiobufs; static int ipath_set_kpiobufs(const char *val, struct kernel_param *kp); module_param_call(kpiobufs, ipath_set_kpiobufs, param_get_ushort, &ipath_kpiobufs, S_IWUSR | S_IRUGO); MODULE_PARM_DESC(kpiobufs, "Set number of PIO buffers for driver"); /** * create_port0_egr - allocate the eager TID buffers * @dd: the infinipath device * * This code is now quite different for user and kernel, because * the kernel uses skb's, for the accelerated network performance. * This is the kernel (port0) version. * * Allocate the eager TID buffers and program them into infinipath. * We use the network layer alloc_skb() allocator to allocate the * memory, and either use the buffers as is for things like verbs * packets, or pass the buffers up to the ipath layered driver and * thence the network layer, replacing them as we do so (see * ipath_rcv_layer()). */ static int create_port0_egr(struct ipath_devdata *dd) { unsigned e, egrcnt; struct ipath_skbinfo *skbinfo; int ret; egrcnt = dd->ipath_p0_rcvegrcnt; skbinfo = vmalloc(sizeof(*dd->ipath_port0_skbinfo) * egrcnt); if (skbinfo == NULL) { ipath_dev_err(dd, "allocation error for eager TID " "skb array\n"); ret = -ENOMEM; goto bail; } for (e = 0; e < egrcnt; e++) { /* * This is a bit tricky in that we allocate extra * space for 2 bytes of the 14 byte ethernet header. * These two bytes are passed in the ipath header so * the rest of the data is word aligned. We allocate * 4 bytes so that the data buffer stays word aligned. * See ipath_kreceive() for more details. */ skbinfo[e].skb = ipath_alloc_skb(dd, GFP_KERNEL); if (!skbinfo[e].skb) { ipath_dev_err(dd, "SKB allocation error for " "eager TID %u\n", e); while (e != 0) dev_kfree_skb(skbinfo[--e].skb); vfree(skbinfo); ret = -ENOMEM; goto bail; } } /* * After loop above, so we can test non-NULL to see if ready * to use at receive, etc. */ dd->ipath_port0_skbinfo = skbinfo; for (e = 0; e < egrcnt; e++) { dd->ipath_port0_skbinfo[e].phys = ipath_map_single(dd->pcidev, dd->ipath_port0_skbinfo[e].skb->data, dd->ipath_ibmaxlen, PCI_DMA_FROMDEVICE); dd->ipath_f_put_tid(dd, e + (u64 __iomem *) ((char __iomem *) dd->ipath_kregbase + dd->ipath_rcvegrbase), RCVHQ_RCV_TYPE_EAGER, dd->ipath_port0_skbinfo[e].phys); } ret = 0; bail: return ret; } static int bringup_link(struct ipath_devdata *dd) { u64 val, ibc; int ret = 0; /* hold IBC in reset */ dd->ipath_control &= ~INFINIPATH_C_LINKENABLE; ipath_write_kreg(dd, dd->ipath_kregs->kr_control, dd->ipath_control); /* * Note that prior to try 14 or 15 of IB, the credit scaling * wasn't working, because it was swapped for writes with the * 1 bit default linkstate field */ /* ignore pbc and align word */ val = dd->ipath_piosize2k - 2 * sizeof(u32); /* * for ICRC, which we only send in diag test pkt mode, and we * don't need to worry about that for mtu */ val += 1; /* * Set the IBC maxpktlength to the size of our pio buffers the * maxpktlength is in words. This is *not* the IB data MTU. */ ibc = (val / sizeof(u32)) << INFINIPATH_IBCC_MAXPKTLEN_SHIFT; /* in KB */ ibc |= 0x5ULL << INFINIPATH_IBCC_FLOWCTRLWATERMARK_SHIFT; /* * How often flowctrl sent. More or less in usecs; balance against * watermark value, so that in theory senders always get a flow * control update in time to not let the IB link go idle. */ ibc |= 0x3ULL << INFINIPATH_IBCC_FLOWCTRLPERIOD_SHIFT; /* max error tolerance */ ibc |= 0xfULL << INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT; /* use "real" buffer space for */ ibc |= 4ULL << INFINIPATH_IBCC_CREDITSCALE_SHIFT; /* IB credit flow control. */ ibc |= 0xfULL << INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT; /* initially come up waiting for TS1, without sending anything. */ dd->ipath_ibcctrl = ibc; /* * Want to start out with both LINKCMD and LINKINITCMD in NOP * (0 and 0). Don't put linkinitcmd in ipath_ibcctrl, want that * to stay a NOP */ ibc |= INFINIPATH_IBCC_LINKINITCMD_DISABLE << INFINIPATH_IBCC_LINKINITCMD_SHIFT; ipath_cdbg(VERBOSE, "Writing 0x%llx to ibcctrl\n", (unsigned long long) ibc); ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, ibc); // be sure chip saw it val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); ret = dd->ipath_f_bringup_serdes(dd); if (ret) dev_info(&dd->pcidev->dev, "Could not initialize SerDes, " "not usable\n"); else { /* enable IBC */ dd->ipath_control |= INFINIPATH_C_LINKENABLE; ipath_write_kreg(dd, dd->ipath_kregs->kr_control, dd->ipath_control); } return ret; } static struct ipath_portdata *create_portdata0(struct ipath_devdata *dd) { struct ipath_portdata *pd = NULL; pd = kzalloc(sizeof(*pd), GFP_KERNEL); if (pd) { pd->port_dd = dd; pd->port_cnt = 1; /* The port 0 pkey table is used by the layer interface. */ pd->port_pkeys[0] = IPATH_DEFAULT_P_KEY; } return pd; } static int init_chip_first(struct ipath_devdata *dd, struct ipath_portdata **pdp) { struct ipath_portdata *pd = NULL; int ret = 0; u64 val; /* * skip cfgports stuff because we are not allocating memory, * and we don't want problems if the portcnt changed due to * cfgports. We do still check and report a difference, if * not same (should be impossible). */ dd->ipath_f_config_ports(dd, ipath_cfgports); if (!ipath_cfgports) dd->ipath_cfgports = dd->ipath_portcnt; else if (ipath_cfgports <= dd->ipath_portcnt) { dd->ipath_cfgports = ipath_cfgports; ipath_dbg("Configured to use %u ports out of %u in chip\n", dd->ipath_cfgports, dd->ipath_portcnt); } else { dd->ipath_cfgports = dd->ipath_portcnt; ipath_dbg("Tried to configured to use %u ports; chip " "only supports %u\n", ipath_cfgports, dd->ipath_portcnt); } /* * Allocate full portcnt array, rather than just cfgports, because * cleanup iterates across all possible ports. */ dd->ipath_pd = kzalloc(sizeof(*dd->ipath_pd) * dd->ipath_portcnt, GFP_KERNEL); if (!dd->ipath_pd) { ipath_dev_err(dd, "Unable to allocate portdata array, " "failing\n"); ret = -ENOMEM; goto done; } pd = create_portdata0(dd); if (!pd) { ipath_dev_err(dd, "Unable to allocate portdata for port " "0, failing\n"); ret = -ENOMEM; goto done; } dd->ipath_pd[0] = pd; dd->ipath_rcvtidcnt = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidcnt); dd->ipath_rcvtidbase = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidbase); dd->ipath_rcvegrcnt = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrcnt); dd->ipath_rcvegrbase = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrbase); dd->ipath_palign = ipath_read_kreg32(dd, dd->ipath_kregs->kr_pagealign); dd->ipath_piobufbase = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpiobufbase); val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpiosize); dd->ipath_piosize2k = val & ~0U; dd->ipath_piosize4k = val >> 32; /* * Note: the chips support a maximum MTU of 4096, but the driver * hasn't implemented this feature yet, so set the initial value * to 2048. */ dd->ipath_ibmtu = 2048; val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpiobufcnt); dd->ipath_piobcnt2k = val & ~0U; dd->ipath_piobcnt4k = val >> 32; dd->ipath_pio2kbase = (u32 __iomem *) (((char __iomem *) dd->ipath_kregbase) + (dd->ipath_piobufbase & 0xffffffff)); if (dd->ipath_piobcnt4k) { dd->ipath_pio4kbase = (u32 __iomem *) (((char __iomem *) dd->ipath_kregbase) + (dd->ipath_piobufbase >> 32)); /* * 4K buffers take 2 pages; we use roundup just to be * paranoid; we calculate it once here, rather than on * ever buf allocate */ dd->ipath_4kalign = ALIGN(dd->ipath_piosize4k, dd->ipath_palign); ipath_dbg("%u 2k(%x) piobufs @ %p, %u 4k(%x) @ %p " "(%x aligned)\n", dd->ipath_piobcnt2k, dd->ipath_piosize2k, dd->ipath_pio2kbase, dd->ipath_piobcnt4k, dd->ipath_piosize4k, dd->ipath_pio4kbase, dd->ipath_4kalign); } else ipath_dbg("%u 2k piobufs @ %p\n", dd->ipath_piobcnt2k, dd->ipath_pio2kbase); spin_lock_init(&dd->ipath_tid_lock); spin_lock_init(&dd->ipath_sendctrl_lock); spin_lock_init(&dd->ipath_gpio_lock); spin_lock_init(&dd->ipath_eep_st_lock); mutex_init(&dd->ipath_eep_lock); done: *pdp = pd; return ret; } /** * init_chip_reset - re-initialize after a reset, or enable * @dd: the infinipath device * @pdp: output for port data * * sanity check at least some of the values after reset, and * ensure no receive or transmit (explictly, in case reset * failed */ static int init_chip_reset(struct ipath_devdata *dd, struct ipath_portdata **pdp) { u32 rtmp; *pdp = dd->ipath_pd[0]; /* ensure chip does no sends or receives while we re-initialize */ dd->ipath_control = dd->ipath_sendctrl = dd->ipath_rcvctrl = 0U; ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, dd->ipath_rcvctrl); ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, dd->ipath_sendctrl); ipath_write_kreg(dd, dd->ipath_kregs->kr_control, dd->ipath_control); rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_portcnt); if (dd->ipath_portcnt != rtmp) dev_info(&dd->pcidev->dev, "portcnt was %u before " "reset, now %u, using original\n", dd->ipath_portcnt, rtmp); rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidcnt); if (rtmp != dd->ipath_rcvtidcnt) dev_info(&dd->pcidev->dev, "tidcnt was %u before " "reset, now %u, using original\n", dd->ipath_rcvtidcnt, rtmp); rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidbase); if (rtmp != dd->ipath_rcvtidbase) dev_info(&dd->pcidev->dev, "tidbase was %u before " "reset, now %u, using original\n", dd->ipath_rcvtidbase, rtmp); rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrcnt); if (rtmp != dd->ipath_rcvegrcnt) dev_info(&dd->pcidev->dev, "egrcnt was %u before " "reset, now %u, using original\n", dd->ipath_rcvegrcnt, rtmp); rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrbase); if (rtmp != dd->ipath_rcvegrbase) dev_info(&dd->pcidev->dev, "egrbase was %u before " "reset, now %u, using original\n", dd->ipath_rcvegrbase, rtmp); return 0; } static int init_pioavailregs(struct ipath_devdata *dd) { int ret; dd->ipath_pioavailregs_dma = dma_alloc_coherent( &dd->pcidev->dev, PAGE_SIZE, &dd->ipath_pioavailregs_phys, GFP_KERNEL); if (!dd->ipath_pioavailregs_dma) { ipath_dev_err(dd, "failed to allocate PIOavail reg area " "in memory\n"); ret = -ENOMEM; goto done; } /* * we really want L2 cache aligned, but for current CPUs of * interest, they are the same. */ dd->ipath_statusp = (u64 *) ((char *)dd->ipath_pioavailregs_dma + ((2 * L1_CACHE_BYTES + dd->ipath_pioavregs * sizeof(u64)) & ~L1_CACHE_BYTES)); /* copy the current value now that it's really allocated */ *dd->ipath_statusp = dd->_ipath_status; /* * setup buffer to hold freeze msg, accessible to apps, * following statusp */ dd->ipath_freezemsg = (char *)&dd->ipath_statusp[1]; /* and its length */ dd->ipath_freezelen = L1_CACHE_BYTES - sizeof(dd->ipath_statusp[0]); ret = 0; done: return ret; } /** * init_shadow_tids - allocate the shadow TID array * @dd: the infinipath device * * allocate the shadow TID array, so we can ipath_munlock previous * entries. It may make more sense to move the pageshadow to the * port data structure, so we only allocate memory for ports actually * in use, since we at 8k per port, now. */ static void init_shadow_tids(struct ipath_devdata *dd) { struct page **pages; dma_addr_t *addrs; pages = vmalloc(dd->ipath_cfgports * dd->ipath_rcvtidcnt * sizeof(struct page *)); if (!pages) { ipath_dev_err(dd, "failed to allocate shadow page * " "array, no expected sends!\n"); dd->ipath_pageshadow = NULL; return; } addrs = vmalloc(dd->ipath_cfgports * dd->ipath_rcvtidcnt * sizeof(dma_addr_t)); if (!addrs) { ipath_dev_err(dd, "failed to allocate shadow dma handle " "array, no expected sends!\n"); vfree(dd->ipath_pageshadow); dd->ipath_pageshadow = NULL; return; } memset(pages, 0, dd->ipath_cfgports * dd->ipath_rcvtidcnt * sizeof(struct page *)); dd->ipath_pageshadow = pages; dd->ipath_physshadow = addrs; } static void enable_chip(struct ipath_devdata *dd, struct ipath_portdata *pd, int reinit) { u32 val; unsigned long flags; int i; if (!reinit) init_waitqueue_head(&ipath_state_wait); ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, dd->ipath_rcvctrl); spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); /* Enable PIO send, and update of PIOavail regs to memory. */ dd->ipath_sendctrl = INFINIPATH_S_PIOENABLE | INFINIPATH_S_PIOBUFAVAILUPD; ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, dd->ipath_sendctrl); ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); /* * enable port 0 receive, and receive interrupt. other ports * done as user opens and inits them. */ dd->ipath_rcvctrl = (1ULL << dd->ipath_r_tailupd_shift) | (1ULL << dd->ipath_r_portenable_shift) | (1ULL << dd->ipath_r_intravail_shift); ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, dd->ipath_rcvctrl); /* * now ready for use. this should be cleared whenever we * detect a reset, or initiate one. */ dd->ipath_flags |= IPATH_INITTED; /* * init our shadow copies of head from tail values, and write * head values to match. */ val = ipath_read_ureg32(dd, ur_rcvegrindextail, 0); (void)ipath_write_ureg(dd, ur_rcvegrindexhead, val, 0); /* Initialize so we interrupt on next packet received */ (void)ipath_write_ureg(dd, ur_rcvhdrhead, dd->ipath_rhdrhead_intr_off | dd->ipath_pd[0]->port_head, 0); /* * by now pioavail updates to memory should have occurred, so * copy them into our working/shadow registers; this is in * case something went wrong with abort, but mostly to get the * initial values of the generation bit correct. */ for (i = 0; i < dd->ipath_pioavregs; i++) { __le64 pioavail; /* * Chip Errata bug 6641; even and odd qwords>3 are swapped. */ if (i > 3 && (dd->ipath_flags & IPATH_SWAP_PIOBUFS)) pioavail = dd->ipath_pioavailregs_dma[i ^ 1]; else pioavail = dd->ipath_pioavailregs_dma[i]; dd->ipath_pioavailshadow[i] = le64_to_cpu(pioavail); } /* can get counters, stats, etc. */ dd->ipath_flags |= IPATH_PRESENT; } static int init_housekeeping(struct ipath_devdata *dd, struct ipath_portdata **pdp, int reinit) { char boardn[32]; int ret = 0; /* * have to clear shadow copies of registers at init that are * not otherwise set here, or all kinds of bizarre things * happen with driver on chip reset */ dd->ipath_rcvhdrsize = 0; /* * Don't clear ipath_flags as 8bit mode was set before * entering this func. However, we do set the linkstate to * unknown, so we can watch for a transition. * PRESENT is set because we want register reads to work, * and the kernel infrastructure saw it in config space; * We clear it if we have failures. */ dd->ipath_flags |= IPATH_LINKUNK | IPATH_PRESENT; dd->ipath_flags &= ~(IPATH_LINKACTIVE | IPATH_LINKARMED | IPATH_LINKDOWN | IPATH_LINKINIT); ipath_cdbg(VERBOSE, "Try to read spc chip revision\n"); dd->ipath_revision = ipath_read_kreg64(dd, dd->ipath_kregs->kr_revision); /* * set up fundamental info we need to use the chip; we assume * if the revision reg and these regs are OK, we don't need to * special case the rest */ dd->ipath_sregbase = ipath_read_kreg32(dd, dd->ipath_kregs->kr_sendregbase); dd->ipath_cregbase = ipath_read_kreg32(dd, dd->ipath_kregs->kr_counterregbase); dd->ipath_uregbase = ipath_read_kreg32(dd, dd->ipath_kregs->kr_userregbase); ipath_cdbg(VERBOSE, "ipath_kregbase %p, sendbase %x usrbase %x, " "cntrbase %x\n", dd->ipath_kregbase, dd->ipath_sregbase, dd->ipath_uregbase, dd->ipath_cregbase); if ((dd->ipath_revision & 0xffffffff) == 0xffffffff || (dd->ipath_sregbase & 0xffffffff) == 0xffffffff || (dd->ipath_cregbase & 0xffffffff) == 0xffffffff || (dd->ipath_uregbase & 0xffffffff) == 0xffffffff) { ipath_dev_err(dd, "Register read failures from chip, " "giving up initialization\n"); dd->ipath_flags &= ~IPATH_PRESENT; ret = -ENODEV; goto done; } /* clear diagctrl register, in case diags were running and crashed */ ipath_write_kreg (dd, dd->ipath_kregs->kr_hwdiagctrl, 0); /* clear the initial reset flag, in case first driver load */ ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, INFINIPATH_E_RESET); if (reinit) ret = init_chip_reset(dd, pdp); else ret = init_chip_first(dd, pdp); if (ret) goto done; ipath_cdbg(VERBOSE, "Revision %llx (PCI %x), %u ports, %u tids, " "%u egrtids\n", (unsigned long long) dd->ipath_revision, dd->ipath_pcirev, dd->ipath_portcnt, dd->ipath_rcvtidcnt, dd->ipath_rcvegrcnt); if (((dd->ipath_revision >> INFINIPATH_R_SOFTWARE_SHIFT) & INFINIPATH_R_SOFTWARE_MASK) != IPATH_CHIP_SWVERSION) { ipath_dev_err(dd, "Driver only handles version %d, " "chip swversion is %d (%llx), failng\n", IPATH_CHIP_SWVERSION, (int)(dd->ipath_revision >> INFINIPATH_R_SOFTWARE_SHIFT) & INFINIPATH_R_SOFTWARE_MASK, (unsigned long long) dd->ipath_revision); ret = -ENOSYS; goto done; } dd->ipath_majrev = (u8) ((dd->ipath_revision >> INFINIPATH_R_CHIPREVMAJOR_SHIFT) & INFINIPATH_R_CHIPREVMAJOR_MASK); dd->ipath_minrev = (u8) ((dd->ipath_revision >> INFINIPATH_R_CHIPREVMINOR_SHIFT) & INFINIPATH_R_CHIPREVMINOR_MASK); dd->ipath_boardrev = (u8) ((dd->ipath_revision >> INFINIPATH_R_BOARDID_SHIFT) & INFINIPATH_R_BOARDID_MASK); ret = dd->ipath_f_get_boardname(dd, boardn, sizeof boardn); snprintf(dd->ipath_boardversion, sizeof(dd->ipath_boardversion), "ChipABI %u.%u, %s, InfiniPath%u %u.%u, PCI %u, " "SW Compat %u\n", IPATH_CHIP_VERS_MAJ, IPATH_CHIP_VERS_MIN, boardn, (unsigned)(dd->ipath_revision >> INFINIPATH_R_ARCH_SHIFT) & INFINIPATH_R_ARCH_MASK, dd->ipath_majrev, dd->ipath_minrev, dd->ipath_pcirev, (unsigned)(dd->ipath_revision >> INFINIPATH_R_SOFTWARE_SHIFT) & INFINIPATH_R_SOFTWARE_MASK); ipath_dbg("%s", dd->ipath_boardversion); done: return ret; } /** * ipath_init_chip - do the actual initialization sequence on the chip * @dd: the infinipath device * @reinit: reinitializing, so don't allocate new memory * * Do the actual initialization sequence on the chip. This is done * both from the init routine called from the PCI infrastructure, and * when we reset the chip, or detect that it was reset internally, * or it's administratively re-enabled. * * Memory allocation here and in called routines is only done in * the first case (reinit == 0). We have to be careful, because even * without memory allocation, we need to re-write all the chip registers * TIDs, etc. after the reset or enable has completed. */ int ipath_init_chip(struct ipath_devdata *dd, int reinit) { int ret = 0; u32 val32, kpiobufs; u32 piobufs, uports; u64 val; struct ipath_portdata *pd = NULL; /* keep gcc4 happy */ gfp_t gfp_flags = GFP_USER | __GFP_COMP; unsigned long flags; ret = init_housekeeping(dd, &pd, reinit); if (ret) goto done; /* * we ignore most issues after reporting them, but have to specially * handle hardware-disabled chips. */ if (ret == 2) { /* unique error, known to ipath_init_one */ ret = -EPERM; goto done; } /* * We could bump this to allow for full rcvegrcnt + rcvtidcnt, * but then it no longer nicely fits power of two, and since * we now use routines that backend onto __get_free_pages, the * rest would be wasted. */ dd->ipath_rcvhdrcnt = dd->ipath_rcvegrcnt; ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrcnt, dd->ipath_rcvhdrcnt); /* * Set up the shadow copies of the piobufavail registers, * which we compare against the chip registers for now, and * the in memory DMA'ed copies of the registers. This has to * be done early, before we calculate lastport, etc. */ piobufs = dd->ipath_piobcnt2k + dd->ipath_piobcnt4k; /* * calc number of pioavail registers, and save it; we have 2 * bits per buffer. */ dd->ipath_pioavregs = ALIGN(piobufs, sizeof(u64) * BITS_PER_BYTE / 2) / (sizeof(u64) * BITS_PER_BYTE / 2); uports = dd->ipath_cfgports ? dd->ipath_cfgports - 1 : 0; if (ipath_kpiobufs == 0) { /* not set by user (this is default) */ if (piobufs > 144) kpiobufs = 32; else kpiobufs = 16; } else kpiobufs = ipath_kpiobufs; if (kpiobufs + (uports * IPATH_MIN_USER_PORT_BUFCNT) > piobufs) { int i = (int) piobufs - (int) (uports * IPATH_MIN_USER_PORT_BUFCNT); if (i < 0) i = 0; dev_info(&dd->pcidev->dev, "Allocating %d PIO bufs of " "%d for kernel leaves too few for %d user ports " "(%d each); using %u\n", kpiobufs, piobufs, uports, IPATH_MIN_USER_PORT_BUFCNT, i); /* * shouldn't change ipath_kpiobufs, because could be * different for different devices... */ kpiobufs = i; } dd->ipath_lastport_piobuf = piobufs - kpiobufs; dd->ipath_pbufsport = uports ? dd->ipath_lastport_piobuf / uports : 0; val32 = dd->ipath_lastport_piobuf - (dd->ipath_pbufsport * uports); if (val32 > 0) { ipath_dbg("allocating %u pbufs/port leaves %u unused, " "add to kernel\n", dd->ipath_pbufsport, val32); dd->ipath_lastport_piobuf -= val32; ipath_dbg("%u pbufs/port leaves %u unused, add to kernel\n", dd->ipath_pbufsport, val32); } dd->ipath_lastpioindex = dd->ipath_lastport_piobuf; ipath_cdbg(VERBOSE, "%d PIO bufs for kernel out of %d total %u " "each for %u user ports\n", kpiobufs, piobufs, dd->ipath_pbufsport, uports); dd->ipath_f_early_init(dd); /* * cancel any possible active sends from early driver load. * Follows early_init because some chips have to initialize * PIO buffers in early_init to avoid false parity errors. */ ipath_cancel_sends(dd, 0); /* early_init sets rcvhdrentsize and rcvhdrsize, so this must be * done after early_init */ dd->ipath_hdrqlast = dd->ipath_rcvhdrentsize * (dd->ipath_rcvhdrcnt - 1); ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrentsize, dd->ipath_rcvhdrentsize); ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrsize, dd->ipath_rcvhdrsize); if (!reinit) { ret = init_pioavailregs(dd); init_shadow_tids(dd); if (ret) goto done; } (void)ipath_write_kreg(dd, dd->ipath_kregs->kr_sendpioavailaddr, dd->ipath_pioavailregs_phys); /* * this is to detect s/w errors, which the h/w works around by * ignoring the low 6 bits of address, if it wasn't aligned. */ val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpioavailaddr); if (val != dd->ipath_pioavailregs_phys) { ipath_dev_err(dd, "Catastrophic software error, " "SendPIOAvailAddr written as %lx, " "read back as %llx\n", (unsigned long) dd->ipath_pioavailregs_phys, (unsigned long long) val); ret = -EINVAL; goto done; } ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvbthqp, IPATH_KD_QP); /* * make sure we are not in freeze, and PIO send enabled, so * writes to pbc happen */ ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask, 0ULL); ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, ~0ULL&~INFINIPATH_HWE_MEMBISTFAILED); ipath_write_kreg(dd, dd->ipath_kregs->kr_control, 0ULL); spin_lock_irqsave(&dd->ipath_sendctrl_lock, flags); dd->ipath_sendctrl = INFINIPATH_S_PIOENABLE; ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, dd->ipath_sendctrl); ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch); spin_unlock_irqrestore(&dd->ipath_sendctrl_lock, flags); /* * before error clears, since we expect serdes pll errors during * this, the first time after reset */ if (bringup_link(dd)) { dev_info(&dd->pcidev->dev, "Failed to bringup IB link\n"); ret = -ENETDOWN; goto done; } /* * clear any "expected" hwerrs from reset and/or initialization * clear any that aren't enabled (at least this once), and then * set the enable mask */ dd->ipath_f_init_hwerrors(dd); ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, ~0ULL&~INFINIPATH_HWE_MEMBISTFAILED); ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask, dd->ipath_hwerrmask); /* clear all */ ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, -1LL); /* enable errors that are masked, at least this first time. */ ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask, ~dd->ipath_maskederrs); dd->ipath_errormask = ipath_read_kreg64(dd, dd->ipath_kregs->kr_errormask); /* clear any interrupts up to this point (ints still not enabled) */ ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, -1LL); /* * Set up the port 0 (kernel) rcvhdr q and egr TIDs. If doing * re-init, the simplest way to handle this is to free * existing, and re-allocate. * Need to re-create rest of port 0 portdata as well. */ if (reinit) { /* Alloc and init new ipath_portdata for port0, * Then free old pd. Could lead to fragmentation, but also * makes later support for hot-swap easier. */ struct ipath_portdata *npd; npd = create_portdata0(dd); if (npd) { ipath_free_pddata(dd, pd); dd->ipath_pd[0] = pd = npd; } else { ipath_dev_err(dd, "Unable to allocate portdata for" " port 0, failing\n"); ret = -ENOMEM; goto done; } } dd->ipath_f_tidtemplate(dd); ret = ipath_create_rcvhdrq(dd, pd); if (!ret) { dd->ipath_hdrqtailptr = (volatile __le64 *)pd->port_rcvhdrtail_kvaddr; ret = create_port0_egr(dd); } if (ret) ipath_dev_err(dd, "failed to allocate port 0 (kernel) " "rcvhdrq and/or egr bufs\n"); else enable_chip(dd, pd, reinit); if (!ret && !reinit) { /* used when we close a port, for DMA already in flight at close */ dd->ipath_dummy_hdrq = dma_alloc_coherent( &dd->pcidev->dev, pd->port_rcvhdrq_size, &dd->ipath_dummy_hdrq_phys, gfp_flags); if (!dd->ipath_dummy_hdrq ) { dev_info(&dd->pcidev->dev, "Couldn't allocate 0x%lx bytes for dummy hdrq\n", pd->port_rcvhdrq_size); /* fallback to just 0'ing */ dd->ipath_dummy_hdrq_phys = 0UL; } } /* * cause retrigger of pending interrupts ignored during init, * even if we had errors */ ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, 0ULL); if(!dd->ipath_stats_timer_active) { /* * first init, or after an admin disable/enable * set up stats retrieval timer, even if we had errors * in last portion of setup */ init_timer(&dd->ipath_stats_timer); dd->ipath_stats_timer.function = ipath_get_faststats; dd->ipath_stats_timer.data = (unsigned long) dd; /* every 5 seconds; */ dd->ipath_stats_timer.expires = jiffies + 5 * HZ; /* takes ~16 seconds to overflow at full IB 4x bandwdith */ add_timer(&dd->ipath_stats_timer); dd->ipath_stats_timer_active = 1; } done: if (!ret) { *dd->ipath_statusp |= IPATH_STATUS_CHIP_PRESENT; if (!dd->ipath_f_intrsetup(dd)) { /* now we can enable all interrupts from the chip */ ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask, -1LL); /* force re-interrupt of any pending interrupts. */ ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, 0ULL); /* chip is usable; mark it as initialized */ *dd->ipath_statusp |= IPATH_STATUS_INITTED; } else ipath_dev_err(dd, "No interrupts enabled, couldn't " "setup interrupt address\n"); if (dd->ipath_cfgports > ipath_stats.sps_nports) /* * sps_nports is a global, so, we set it to * the highest number of ports of any of the * chips we find; we never decrement it, at * least for now. Since this might have changed * over disable/enable or prior to reset, always * do the check and potentially adjust. */ ipath_stats.sps_nports = dd->ipath_cfgports; } else ipath_dbg("Failed (%d) to initialize chip\n", ret); /* if ret is non-zero, we probably should do some cleanup here... */ return ret; } static int ipath_set_kpiobufs(const char *str, struct kernel_param *kp) { struct ipath_devdata *dd; unsigned long flags; unsigned short val; int ret; ret = ipath_parse_ushort(str, &val); spin_lock_irqsave(&ipath_devs_lock, flags); if (ret < 0) goto bail; if (val == 0) { ret = -EINVAL; goto bail; } list_for_each_entry(dd, &ipath_dev_list, ipath_list) { if (dd->ipath_kregbase) continue; if (val > (dd->ipath_piobcnt2k + dd->ipath_piobcnt4k - (dd->ipath_cfgports * IPATH_MIN_USER_PORT_BUFCNT))) { ipath_dev_err( dd, "Allocating %d PIO bufs for kernel leaves " "too few for %d user ports (%d each)\n", val, dd->ipath_cfgports - 1, IPATH_MIN_USER_PORT_BUFCNT); ret = -EINVAL; goto bail; } dd->ipath_lastport_piobuf = dd->ipath_piobcnt2k + dd->ipath_piobcnt4k - val; } ipath_kpiobufs = val; ret = 0; bail: spin_unlock_irqrestore(&ipath_devs_lock, flags); return ret; }