diff options
Diffstat (limited to 'drivers/infiniband/hw/ipath/ipath_sd7220.c')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_sd7220.c | 1462 |
1 files changed, 0 insertions, 1462 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_sd7220.c b/drivers/infiniband/hw/ipath/ipath_sd7220.c deleted file mode 100644 index 2a68d9f624dd..000000000000 --- a/drivers/infiniband/hw/ipath/ipath_sd7220.c +++ /dev/null @@ -1,1462 +0,0 @@ -/* - * Copyright (c) 2006, 2007, 2008 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. - */ -/* - * This file contains all of the code that is specific to the SerDes - * on the InfiniPath 7220 chip. - */ - -#include <linux/pci.h> -#include <linux/delay.h> - -#include "ipath_kernel.h" -#include "ipath_registers.h" -#include "ipath_7220.h" - -/* - * The IBSerDesMappTable is a memory that holds values to be stored in - * various SerDes registers by IBC. It is not part of the normal kregs - * map and is used in exactly one place, hence the #define below. - */ -#define KR_IBSerDesMappTable (0x94000 / (sizeof(uint64_t))) - -/* - * Below used for sdnum parameter, selecting one of the two sections - * used for PCIe, or the single SerDes used for IB. - */ -#define PCIE_SERDES0 0 -#define PCIE_SERDES1 1 - -/* - * The EPB requires addressing in a particular form. EPB_LOC() is intended - * to make #definitions a little more readable. - */ -#define EPB_ADDR_SHF 8 -#define EPB_LOC(chn, elt, reg) \ - (((elt & 0xf) | ((chn & 7) << 4) | ((reg & 0x3f) << 9)) << \ - EPB_ADDR_SHF) -#define EPB_IB_QUAD0_CS_SHF (25) -#define EPB_IB_QUAD0_CS (1U << EPB_IB_QUAD0_CS_SHF) -#define EPB_IB_UC_CS_SHF (26) -#define EPB_PCIE_UC_CS_SHF (27) -#define EPB_GLOBAL_WR (1U << (EPB_ADDR_SHF + 8)) - -/* Forward declarations. */ -static int ipath_sd7220_reg_mod(struct ipath_devdata *dd, int sdnum, u32 loc, - u32 data, u32 mask); -static int ibsd_mod_allchnls(struct ipath_devdata *dd, int loc, int val, - int mask); -static int ipath_sd_trimdone_poll(struct ipath_devdata *dd); -static void ipath_sd_trimdone_monitor(struct ipath_devdata *dd, - const char *where); -static int ipath_sd_setvals(struct ipath_devdata *dd); -static int ipath_sd_early(struct ipath_devdata *dd); -static int ipath_sd_dactrim(struct ipath_devdata *dd); -/* Set the registers that IBC may muck with to their default "preset" values */ -int ipath_sd7220_presets(struct ipath_devdata *dd); -static int ipath_internal_presets(struct ipath_devdata *dd); -/* Tweak the register (CMUCTRL5) that contains the TRIMSELF controls */ -static int ipath_sd_trimself(struct ipath_devdata *dd, int val); -static int epb_access(struct ipath_devdata *dd, int sdnum, int claim); - -void ipath_set_relock_poll(struct ipath_devdata *dd, int ibup); - -/* - * Below keeps track of whether the "once per power-on" initialization has - * been done, because uC code Version 1.32.17 or higher allows the uC to - * be reset at will, and Automatic Equalization may require it. So the - * state of the reset "pin", as reflected in was_reset parameter to - * ipath_sd7220_init() is no longer valid. Instead, we check for the - * actual uC code having been loaded. - */ -static int ipath_ibsd_ucode_loaded(struct ipath_devdata *dd) -{ - if (!dd->serdes_first_init_done && (ipath_sd7220_ib_vfy(dd) > 0)) - dd->serdes_first_init_done = 1; - return dd->serdes_first_init_done; -} - -/* repeat #define for local use. "Real" #define is in ipath_iba7220.c */ -#define INFINIPATH_HWE_IB_UC_MEMORYPARITYERR 0x0000004000000000ULL -#define IB_MPREG5 (EPB_LOC(6, 0, 0xE) | (1L << EPB_IB_UC_CS_SHF)) -#define IB_MPREG6 (EPB_LOC(6, 0, 0xF) | (1U << EPB_IB_UC_CS_SHF)) -#define UC_PAR_CLR_D 8 -#define UC_PAR_CLR_M 0xC -#define IB_CTRL2(chn) (EPB_LOC(chn, 7, 3) | EPB_IB_QUAD0_CS) -#define START_EQ1(chan) EPB_LOC(chan, 7, 0x27) - -void ipath_sd7220_clr_ibpar(struct ipath_devdata *dd) -{ - int ret; - - /* clear, then re-enable parity errs */ - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, IB_MPREG6, - UC_PAR_CLR_D, UC_PAR_CLR_M); - if (ret < 0) { - ipath_dev_err(dd, "Failed clearing IBSerDes Parity err\n"); - goto bail; - } - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, IB_MPREG6, 0, - UC_PAR_CLR_M); - - ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch); - udelay(4); - ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear, - INFINIPATH_HWE_IB_UC_MEMORYPARITYERR); - ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch); -bail: - return; -} - -/* - * After a reset or other unusual event, the epb interface may need - * to be re-synchronized, between the host and the uC. - * returns <0 for failure to resync within IBSD_RESYNC_TRIES (not expected) - */ -#define IBSD_RESYNC_TRIES 3 -#define IB_PGUDP(chn) (EPB_LOC((chn), 2, 1) | EPB_IB_QUAD0_CS) -#define IB_CMUDONE(chn) (EPB_LOC((chn), 7, 0xF) | EPB_IB_QUAD0_CS) - -static int ipath_resync_ibepb(struct ipath_devdata *dd) -{ - int ret, pat, tries, chn; - u32 loc; - - ret = -1; - chn = 0; - for (tries = 0; tries < (4 * IBSD_RESYNC_TRIES); ++tries) { - loc = IB_PGUDP(chn); - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, loc, 0, 0); - if (ret < 0) { - ipath_dev_err(dd, "Failed read in resync\n"); - continue; - } - if (ret != 0xF0 && ret != 0x55 && tries == 0) - ipath_dev_err(dd, "unexpected pattern in resync\n"); - pat = ret ^ 0xA5; /* alternate F0 and 55 */ - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, loc, pat, 0xFF); - if (ret < 0) { - ipath_dev_err(dd, "Failed write in resync\n"); - continue; - } - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, loc, 0, 0); - if (ret < 0) { - ipath_dev_err(dd, "Failed re-read in resync\n"); - continue; - } - if (ret != pat) { - ipath_dev_err(dd, "Failed compare1 in resync\n"); - continue; - } - loc = IB_CMUDONE(chn); - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, loc, 0, 0); - if (ret < 0) { - ipath_dev_err(dd, "Failed CMUDONE rd in resync\n"); - continue; - } - if ((ret & 0x70) != ((chn << 4) | 0x40)) { - ipath_dev_err(dd, "Bad CMUDONE value %02X, chn %d\n", - ret, chn); - continue; - } - if (++chn == 4) - break; /* Success */ - } - ipath_cdbg(VERBOSE, "Resync in %d tries\n", tries); - return (ret > 0) ? 0 : ret; -} - -/* - * Localize the stuff that should be done to change IB uC reset - * returns <0 for errors. - */ -static int ipath_ibsd_reset(struct ipath_devdata *dd, int assert_rst) -{ - u64 rst_val; - int ret = 0; - unsigned long flags; - - rst_val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibserdesctrl); - if (assert_rst) { - /* - * Vendor recommends "interrupting" uC before reset, to - * minimize possible glitches. - */ - spin_lock_irqsave(&dd->ipath_sdepb_lock, flags); - epb_access(dd, IB_7220_SERDES, 1); - rst_val |= 1ULL; - /* Squelch possible parity error from _asserting_ reset */ - ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask, - dd->ipath_hwerrmask & - ~INFINIPATH_HWE_IB_UC_MEMORYPARITYERR); - ipath_write_kreg(dd, dd->ipath_kregs->kr_ibserdesctrl, rst_val); - /* flush write, delay to ensure it took effect */ - ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch); - udelay(2); - /* once it's reset, can remove interrupt */ - epb_access(dd, IB_7220_SERDES, -1); - spin_unlock_irqrestore(&dd->ipath_sdepb_lock, flags); - } else { - /* - * Before we de-assert reset, we need to deal with - * possible glitch on the Parity-error line. - * Suppress it around the reset, both in chip-level - * hwerrmask and in IB uC control reg. uC will allow - * it again during startup. - */ - u64 val; - rst_val &= ~(1ULL); - ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask, - dd->ipath_hwerrmask & - ~INFINIPATH_HWE_IB_UC_MEMORYPARITYERR); - - ret = ipath_resync_ibepb(dd); - if (ret < 0) - ipath_dev_err(dd, "unable to re-sync IB EPB\n"); - - /* set uC control regs to suppress parity errs */ - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, IB_MPREG5, 1, 1); - if (ret < 0) - goto bail; - /* IB uC code past Version 1.32.17 allow suppression of wdog */ - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, IB_MPREG6, 0x80, - 0x80); - if (ret < 0) { - ipath_dev_err(dd, "Failed to set WDOG disable\n"); - goto bail; - } - ipath_write_kreg(dd, dd->ipath_kregs->kr_ibserdesctrl, rst_val); - /* flush write, delay for startup */ - ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch); - udelay(1); - /* clear, then re-enable parity errs */ - ipath_sd7220_clr_ibpar(dd); - val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_hwerrstatus); - if (val & INFINIPATH_HWE_IB_UC_MEMORYPARITYERR) { - ipath_dev_err(dd, "IBUC Parity still set after RST\n"); - dd->ipath_hwerrmask &= - ~INFINIPATH_HWE_IB_UC_MEMORYPARITYERR; - } - ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask, - dd->ipath_hwerrmask); - } - -bail: - return ret; -} - -static void ipath_sd_trimdone_monitor(struct ipath_devdata *dd, - const char *where) -{ - int ret, chn, baduns; - u64 val; - - if (!where) - where = "?"; - - /* give time for reset to settle out in EPB */ - udelay(2); - - ret = ipath_resync_ibepb(dd); - if (ret < 0) - ipath_dev_err(dd, "not able to re-sync IB EPB (%s)\n", where); - - /* Do "sacrificial read" to get EPB in sane state after reset */ - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, IB_CTRL2(0), 0, 0); - if (ret < 0) - ipath_dev_err(dd, "Failed TRIMDONE 1st read, (%s)\n", where); - - /* Check/show "summary" Trim-done bit in IBCStatus */ - val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus); - if (val & (1ULL << 11)) - ipath_cdbg(VERBOSE, "IBCS TRIMDONE set (%s)\n", where); - else - ipath_dev_err(dd, "IBCS TRIMDONE clear (%s)\n", where); - - udelay(2); - - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, IB_MPREG6, 0x80, 0x80); - if (ret < 0) - ipath_dev_err(dd, "Failed Dummy RMW, (%s)\n", where); - udelay(10); - - baduns = 0; - - for (chn = 3; chn >= 0; --chn) { - /* Read CTRL reg for each channel to check TRIMDONE */ - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, - IB_CTRL2(chn), 0, 0); - if (ret < 0) - ipath_dev_err(dd, "Failed checking TRIMDONE, chn %d" - " (%s)\n", chn, where); - - if (!(ret & 0x10)) { - int probe; - baduns |= (1 << chn); - ipath_dev_err(dd, "TRIMDONE cleared on chn %d (%02X)." - " (%s)\n", chn, ret, where); - probe = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, - IB_PGUDP(0), 0, 0); - ipath_dev_err(dd, "probe is %d (%02X)\n", - probe, probe); - probe = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, - IB_CTRL2(chn), 0, 0); - ipath_dev_err(dd, "re-read: %d (%02X)\n", - probe, probe); - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, - IB_CTRL2(chn), 0x10, 0x10); - if (ret < 0) - ipath_dev_err(dd, - "Err on TRIMDONE rewrite1\n"); - } - } - for (chn = 3; chn >= 0; --chn) { - /* Read CTRL reg for each channel to check TRIMDONE */ - if (baduns & (1 << chn)) { - ipath_dev_err(dd, - "Reseting TRIMDONE on chn %d (%s)\n", - chn, where); - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, - IB_CTRL2(chn), 0x10, 0x10); - if (ret < 0) - ipath_dev_err(dd, "Failed re-setting " - "TRIMDONE, chn %d (%s)\n", - chn, where); - } - } -} - -/* - * Below is portion of IBA7220-specific bringup_serdes() that actually - * deals with registers and memory within the SerDes itself. - * Post IB uC code version 1.32.17, was_reset being 1 is not really - * informative, so we double-check. - */ -int ipath_sd7220_init(struct ipath_devdata *dd, int was_reset) -{ - int ret = 1; /* default to failure */ - int first_reset; - int val_stat; - - if (!was_reset) { - /* entered with reset not asserted, we need to do it */ - ipath_ibsd_reset(dd, 1); - ipath_sd_trimdone_monitor(dd, "Driver-reload"); - } - - /* Substitute our deduced value for was_reset */ - ret = ipath_ibsd_ucode_loaded(dd); - if (ret < 0) { - ret = 1; - goto done; - } - first_reset = !ret; /* First reset if IBSD uCode not yet loaded */ - - /* - * Alter some regs per vendor latest doc, reset-defaults - * are not right for IB. - */ - ret = ipath_sd_early(dd); - if (ret < 0) { - ipath_dev_err(dd, "Failed to set IB SERDES early defaults\n"); - ret = 1; - goto done; - } - - /* - * Set DAC manual trim IB. - * We only do this once after chip has been reset (usually - * same as once per system boot). - */ - if (first_reset) { - ret = ipath_sd_dactrim(dd); - if (ret < 0) { - ipath_dev_err(dd, "Failed IB SERDES DAC trim\n"); - ret = 1; - goto done; - } - } - - /* - * Set various registers (DDS and RXEQ) that will be - * controlled by IBC (in 1.2 mode) to reasonable preset values - * Calling the "internal" version avoids the "check for needed" - * and "trimdone monitor" that might be counter-productive. - */ - ret = ipath_internal_presets(dd); - if (ret < 0) { - ipath_dev_err(dd, "Failed to set IB SERDES presets\n"); - ret = 1; - goto done; - } - ret = ipath_sd_trimself(dd, 0x80); - if (ret < 0) { - ipath_dev_err(dd, "Failed to set IB SERDES TRIMSELF\n"); - ret = 1; - goto done; - } - - /* Load image, then try to verify */ - ret = 0; /* Assume success */ - if (first_reset) { - int vfy; - int trim_done; - ipath_dbg("SerDes uC was reset, reloading PRAM\n"); - ret = ipath_sd7220_ib_load(dd); - if (ret < 0) { - ipath_dev_err(dd, "Failed to load IB SERDES image\n"); - ret = 1; - goto done; - } - - /* Loaded image, try to verify */ - vfy = ipath_sd7220_ib_vfy(dd); - if (vfy != ret) { - ipath_dev_err(dd, "SERDES PRAM VFY failed\n"); - ret = 1; - goto done; - } - /* - * Loaded and verified. Almost good... - * hold "success" in ret - */ - ret = 0; - - /* - * Prev steps all worked, continue bringup - * De-assert RESET to uC, only in first reset, to allow - * trimming. - * - * Since our default setup sets START_EQ1 to - * PRESET, we need to clear that for this very first run. - */ - ret = ibsd_mod_allchnls(dd, START_EQ1(0), 0, 0x38); - if (ret < 0) { - ipath_dev_err(dd, "Failed clearing START_EQ1\n"); - ret = 1; - goto done; - } - - ipath_ibsd_reset(dd, 0); - /* - * If this is not the first reset, trimdone should be set - * already. - */ - trim_done = ipath_sd_trimdone_poll(dd); - /* - * Whether or not trimdone succeeded, we need to put the - * uC back into reset to avoid a possible fight with the - * IBC state-machine. - */ - ipath_ibsd_reset(dd, 1); - - if (!trim_done) { - ipath_dev_err(dd, "No TRIMDONE seen\n"); - ret = 1; - goto done; - } - - ipath_sd_trimdone_monitor(dd, "First-reset"); - /* Remember so we do not re-do the load, dactrim, etc. */ - dd->serdes_first_init_done = 1; - } - /* - * Setup for channel training and load values for - * RxEq and DDS in tables used by IBC in IB1.2 mode - */ - - val_stat = ipath_sd_setvals(dd); - if (val_stat < 0) - ret = 1; -done: - /* start relock timer regardless, but start at 1 second */ - ipath_set_relock_poll(dd, -1); - return ret; -} - -#define EPB_ACC_REQ 1 -#define EPB_ACC_GNT 0x100 -#define EPB_DATA_MASK 0xFF -#define EPB_RD (1ULL << 24) -#define EPB_TRANS_RDY (1ULL << 31) -#define EPB_TRANS_ERR (1ULL << 30) -#define EPB_TRANS_TRIES 5 - -/* - * query, claim, release ownership of the EPB (External Parallel Bus) - * for a specified SERDES. - * the "claim" parameter is >0 to claim, <0 to release, 0 to query. - * Returns <0 for errors, >0 if we had ownership, else 0. - */ -static int epb_access(struct ipath_devdata *dd, int sdnum, int claim) -{ - u16 acc; - u64 accval; - int owned = 0; - u64 oct_sel = 0; - - switch (sdnum) { - case IB_7220_SERDES : - /* - * The IB SERDES "ownership" is fairly simple. A single each - * request/grant. - */ - acc = dd->ipath_kregs->kr_ib_epbacc; - break; - case PCIE_SERDES0 : - case PCIE_SERDES1 : - /* PCIe SERDES has two "octants", need to select which */ - acc = dd->ipath_kregs->kr_pcie_epbacc; - oct_sel = (2 << (sdnum - PCIE_SERDES0)); - break; - default : - return 0; - } - - /* Make sure any outstanding transaction was seen */ - ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch); - udelay(15); - - accval = ipath_read_kreg32(dd, acc); - - owned = !!(accval & EPB_ACC_GNT); - if (claim < 0) { - /* Need to release */ - u64 pollval; - /* - * The only writeable bits are the request and CS. - * Both should be clear - */ - u64 newval = 0; - ipath_write_kreg(dd, acc, newval); - /* First read after write is not trustworthy */ - pollval = ipath_read_kreg32(dd, acc); - udelay(5); - pollval = ipath_read_kreg32(dd, acc); - if (pollval & EPB_ACC_GNT) - owned = -1; - } else if (claim > 0) { - /* Need to claim */ - u64 pollval; - u64 newval = EPB_ACC_REQ | oct_sel; - ipath_write_kreg(dd, acc, newval); - /* First read after write is not trustworthy */ - pollval = ipath_read_kreg32(dd, acc); - udelay(5); - pollval = ipath_read_kreg32(dd, acc); - if (!(pollval & EPB_ACC_GNT)) - owned = -1; - } - return owned; -} - -/* - * Lemma to deal with race condition of write..read to epb regs - */ -static int epb_trans(struct ipath_devdata *dd, u16 reg, u64 i_val, u64 *o_vp) -{ - int tries; - u64 transval; - - - ipath_write_kreg(dd, reg, i_val); - /* Throw away first read, as RDY bit may be stale */ - transval = ipath_read_kreg64(dd, reg); - - for (tries = EPB_TRANS_TRIES; tries; --tries) { - transval = ipath_read_kreg32(dd, reg); - if (transval & EPB_TRANS_RDY) - break; - udelay(5); - } - if (transval & EPB_TRANS_ERR) - return -1; - if (tries > 0 && o_vp) - *o_vp = transval; - return tries; -} - -/** - * - * ipath_sd7220_reg_mod - modify SERDES register - * @dd: the infinipath device - * @sdnum: which SERDES to access - * @loc: location - channel, element, register, as packed by EPB_LOC() macro. - * @wd: Write Data - value to set in register - * @mask: ones where data should be spliced into reg. - * - * Basic register read/modify/write, with un-needed accesses elided. That is, - * a mask of zero will prevent write, while a mask of 0xFF will prevent read. - * returns current (presumed, if a write was done) contents of selected - * register, or <0 if errors. - */ -static int ipath_sd7220_reg_mod(struct ipath_devdata *dd, int sdnum, u32 loc, - u32 wd, u32 mask) -{ - u16 trans; - u64 transval; - int owned; - int tries, ret; - unsigned long flags; - - switch (sdnum) { - case IB_7220_SERDES : - trans = dd->ipath_kregs->kr_ib_epbtrans; - break; - case PCIE_SERDES0 : - case PCIE_SERDES1 : - trans = dd->ipath_kregs->kr_pcie_epbtrans; - break; - default : - return -1; - } - - /* - * All access is locked in software (vs other host threads) and - * hardware (vs uC access). - */ - spin_lock_irqsave(&dd->ipath_sdepb_lock, flags); - - owned = epb_access(dd, sdnum, 1); - if (owned < 0) { - spin_unlock_irqrestore(&dd->ipath_sdepb_lock, flags); - return -1; - } - ret = 0; - for (tries = EPB_TRANS_TRIES; tries; --tries) { - transval = ipath_read_kreg32(dd, trans); - if (transval & EPB_TRANS_RDY) - break; - udelay(5); - } - - if (tries > 0) { - tries = 1; /* to make read-skip work */ - if (mask != 0xFF) { - /* - * Not a pure write, so need to read. - * loc encodes chip-select as well as address - */ - transval = loc | EPB_RD; - tries = epb_trans(dd, trans, transval, &transval); - } - if (tries > 0 && mask != 0) { - /* - * Not a pure read, so need to write. - */ - wd = (wd & mask) | (transval & ~mask); - transval = loc | (wd & EPB_DATA_MASK); - tries = epb_trans(dd, trans, transval, &transval); - } - } - /* else, failed to see ready, what error-handling? */ - - /* - * Release bus. Failure is an error. - */ - if (epb_access(dd, sdnum, -1) < 0) - ret = -1; - else - ret = transval & EPB_DATA_MASK; - - spin_unlock_irqrestore(&dd->ipath_sdepb_lock, flags); - if (tries <= 0) - ret = -1; - return ret; -} - -#define EPB_ROM_R (2) -#define EPB_ROM_W (1) -/* - * Below, all uC-related, use appropriate UC_CS, depending - * on which SerDes is used. - */ -#define EPB_UC_CTL EPB_LOC(6, 0, 0) -#define EPB_MADDRL EPB_LOC(6, 0, 2) -#define EPB_MADDRH EPB_LOC(6, 0, 3) -#define EPB_ROMDATA EPB_LOC(6, 0, 4) -#define EPB_RAMDATA EPB_LOC(6, 0, 5) - -/* Transfer date to/from uC Program RAM of IB or PCIe SerDes */ -static int ipath_sd7220_ram_xfer(struct ipath_devdata *dd, int sdnum, u32 loc, - u8 *buf, int cnt, int rd_notwr) -{ - u16 trans; - u64 transval; - u64 csbit; - int owned; - int tries; - int sofar; - int addr; - int ret; - unsigned long flags; - const char *op; - - /* Pick appropriate transaction reg and "Chip select" for this serdes */ - switch (sdnum) { - case IB_7220_SERDES : - csbit = 1ULL << EPB_IB_UC_CS_SHF; - trans = dd->ipath_kregs->kr_ib_epbtrans; - break; - case PCIE_SERDES0 : - case PCIE_SERDES1 : - /* PCIe SERDES has uC "chip select" in different bit, too */ - csbit = 1ULL << EPB_PCIE_UC_CS_SHF; - trans = dd->ipath_kregs->kr_pcie_epbtrans; - break; - default : - return -1; - } - - op = rd_notwr ? "Rd" : "Wr"; - spin_lock_irqsave(&dd->ipath_sdepb_lock, flags); - - owned = epb_access(dd, sdnum, 1); - if (owned < 0) { - spin_unlock_irqrestore(&dd->ipath_sdepb_lock, flags); - ipath_dbg("Could not get %s access to %s EPB: %X, loc %X\n", - op, (sdnum == IB_7220_SERDES) ? "IB" : "PCIe", - owned, loc); - return -1; - } - - /* - * In future code, we may need to distinguish several address ranges, - * and select various memories based on this. For now, just trim - * "loc" (location including address and memory select) to - * "addr" (address within memory). we will only support PRAM - * The memory is 8KB. - */ - addr = loc & 0x1FFF; - for (tries = EPB_TRANS_TRIES; tries; --tries) { - transval = ipath_read_kreg32(dd, trans); - if (transval & EPB_TRANS_RDY) - break; - udelay(5); - } - - sofar = 0; - if (tries <= 0) - ipath_dbg("No initial RDY on EPB access request\n"); - else { - /* - * Every "memory" access is doubly-indirect. - * We set two bytes of address, then read/write - * one or mores bytes of data. - */ - - /* First, we set control to "Read" or "Write" */ - transval = csbit | EPB_UC_CTL | - (rd_notwr ? EPB_ROM_R : EPB_ROM_W); - tries = epb_trans(dd, trans, transval, &transval); - if (tries <= 0) - ipath_dbg("No EPB response to uC %s cmd\n", op); - while (tries > 0 && sofar < cnt) { - if (!sofar) { - /* Only set address at start of chunk */ - int addrbyte = (addr + sofar) >> 8; - transval = csbit | EPB_MADDRH | addrbyte; - tries = epb_trans(dd, trans, transval, - &transval); - if (tries <= 0) { - ipath_dbg("No EPB response ADDRH\n"); - break; - } - addrbyte = (addr + sofar) & 0xFF; - transval = csbit | EPB_MADDRL | addrbyte; - tries = epb_trans(dd, trans, transval, - &transval); - if (tries <= 0) { - ipath_dbg("No EPB response ADDRL\n"); - break; - } - } - - if (rd_notwr) - transval = csbit | EPB_ROMDATA | EPB_RD; - else - transval = csbit | EPB_ROMDATA | buf[sofar]; - tries = epb_trans(dd, trans, transval, &transval); - if (tries <= 0) { - ipath_dbg("No EPB response DATA\n"); - break; - } - if (rd_notwr) - buf[sofar] = transval & EPB_DATA_MASK; - ++sofar; - } - /* Finally, clear control-bit for Read or Write */ - transval = csbit | EPB_UC_CTL; - tries = epb_trans(dd, trans, transval, &transval); - if (tries <= 0) - ipath_dbg("No EPB response to drop of uC %s cmd\n", op); - } - - ret = sofar; - /* Release bus. Failure is an error */ - if (epb_access(dd, sdnum, -1) < 0) - ret = -1; - - spin_unlock_irqrestore(&dd->ipath_sdepb_lock, flags); - if (tries <= 0) { - ipath_dbg("SERDES PRAM %s failed after %d bytes\n", op, sofar); - ret = -1; - } - return ret; -} - -#define PROG_CHUNK 64 - -int ipath_sd7220_prog_ld(struct ipath_devdata *dd, int sdnum, - u8 *img, int len, int offset) -{ - int cnt, sofar, req; - - sofar = 0; - while (sofar < len) { - req = len - sofar; - if (req > PROG_CHUNK) - req = PROG_CHUNK; - cnt = ipath_sd7220_ram_xfer(dd, sdnum, offset + sofar, - img + sofar, req, 0); - if (cnt < req) { - sofar = -1; - break; - } - sofar += req; - } - return sofar; -} - -#define VFY_CHUNK 64 -#define SD_PRAM_ERROR_LIMIT 42 - -int ipath_sd7220_prog_vfy(struct ipath_devdata *dd, int sdnum, - const u8 *img, int len, int offset) -{ - int cnt, sofar, req, idx, errors; - unsigned char readback[VFY_CHUNK]; - - errors = 0; - sofar = 0; - while (sofar < len) { - req = len - sofar; - if (req > VFY_CHUNK) - req = VFY_CHUNK; - cnt = ipath_sd7220_ram_xfer(dd, sdnum, sofar + offset, - readback, req, 1); - if (cnt < req) { - /* failed in read itself */ - sofar = -1; - break; - } - for (idx = 0; idx < cnt; ++idx) { - if (readback[idx] != img[idx+sofar]) - ++errors; - } - sofar += cnt; - } - return errors ? -errors : sofar; -} - -/* IRQ not set up at this point in init, so we poll. */ -#define IB_SERDES_TRIM_DONE (1ULL << 11) -#define TRIM_TMO (30) - -static int ipath_sd_trimdone_poll(struct ipath_devdata *dd) -{ - int trim_tmo, ret; - uint64_t val; - - /* - * Default to failure, so IBC will not start - * without IB_SERDES_TRIM_DONE. - */ - ret = 0; - for (trim_tmo = 0; trim_tmo < TRIM_TMO; ++trim_tmo) { - val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus); - if (val & IB_SERDES_TRIM_DONE) { - ipath_cdbg(VERBOSE, "TRIMDONE after %d\n", trim_tmo); - ret = 1; - break; - } - msleep(10); - } - if (trim_tmo >= TRIM_TMO) { - ipath_dev_err(dd, "No TRIMDONE in %d tries\n", trim_tmo); - ret = 0; - } - return ret; -} - -#define TX_FAST_ELT (9) - -/* - * Set the "negotiation" values for SERDES. These are used by the IB1.2 - * link negotiation. Macros below are attempt to keep the values a - * little more human-editable. - * First, values related to Drive De-emphasis Settings. - */ - -#define NUM_DDS_REGS 6 -#define DDS_REG_MAP 0x76A910 /* LSB-first list of regs (in elt 9) to mod */ - -#define DDS_VAL(amp_d, main_d, ipst_d, ipre_d, amp_s, main_s, ipst_s, ipre_s) \ - { { ((amp_d & 0x1F) << 1) | 1, ((amp_s & 0x1F) << 1) | 1, \ - (main_d << 3) | 4 | (ipre_d >> 2), \ - (main_s << 3) | 4 | (ipre_s >> 2), \ - ((ipst_d & 0xF) << 1) | ((ipre_d & 3) << 6) | 0x21, \ - ((ipst_s & 0xF) << 1) | ((ipre_s & 3) << 6) | 0x21 } } - -static struct dds_init { - uint8_t reg_vals[NUM_DDS_REGS]; -} dds_init_vals[] = { - /* DDR(FDR) SDR(HDR) */ - /* Vendor recommends below for 3m cable */ -#define DDS_3M 0 - DDS_VAL(31, 19, 12, 0, 29, 22, 9, 0), - DDS_VAL(31, 12, 15, 4, 31, 15, 15, 1), - DDS_VAL(31, 13, 15, 3, 31, 16, 15, 0), - DDS_VAL(31, 14, 15, 2, 31, 17, 14, 0), - DDS_VAL(31, 15, 15, 1, 31, 18, 13, 0), - DDS_VAL(31, 16, 15, 0, 31, 19, 12, 0), - DDS_VAL(31, 17, 14, 0, 31, 20, 11, 0), - DDS_VAL(31, 18, 13, 0, 30, 21, 10, 0), - DDS_VAL(31, 20, 11, 0, 28, 23, 8, 0), - DDS_VAL(31, 21, 10, 0, 27, 24, 7, 0), - DDS_VAL(31, 22, 9, 0, 26, 25, 6, 0), - DDS_VAL(30, 23, 8, 0, 25, 26, 5, 0), - DDS_VAL(29, 24, 7, 0, 23, 27, 4, 0), - /* Vendor recommends below for 1m cable */ -#define DDS_1M 13 - DDS_VAL(28, 25, 6, 0, 21, 28, 3, 0), - DDS_VAL(27, 26, 5, 0, 19, 29, 2, 0), - DDS_VAL(25, 27, 4, 0, 17, 30, 1, 0) -}; - -/* - * Next, values related to Receive Equalization. - * In comments, FDR (Full) is IB DDR, HDR (Half) is IB SDR - */ -/* Hardware packs an element number and register address thus: */ -#define RXEQ_INIT_RDESC(elt, addr) (((elt) & 0xF) | ((addr) << 4)) -#define RXEQ_VAL(elt, adr, val0, val1, val2, val3) \ - {RXEQ_INIT_RDESC((elt), (adr)), {(val0), (val1), (val2), (val3)} } - -#define RXEQ_VAL_ALL(elt, adr, val) \ - {RXEQ_INIT_RDESC((elt), (adr)), {(val), (val), (val), (val)} } - -#define RXEQ_SDR_DFELTH 0 -#define RXEQ_SDR_TLTH 0 -#define RXEQ_SDR_G1CNT_Z1CNT 0x11 -#define RXEQ_SDR_ZCNT 23 - -static struct rxeq_init { - u16 rdesc; /* in form used in SerDesDDSRXEQ */ - u8 rdata[4]; -} rxeq_init_vals[] = { - /* Set Rcv Eq. to Preset node */ - RXEQ_VAL_ALL(7, 0x27, 0x10), - /* Set DFELTHFDR/HDR thresholds */ - RXEQ_VAL(7, 8, 0, 0, 0, 0), /* FDR */ - RXEQ_VAL(7, 0x21, 0, 0, 0, 0), /* HDR */ - /* Set TLTHFDR/HDR threshold */ - RXEQ_VAL(7, 9, 2, 2, 2, 2), /* FDR */ - RXEQ_VAL(7, 0x23, 2, 2, 2, 2), /* HDR */ - /* Set Preamp setting 2 (ZFR/ZCNT) */ - RXEQ_VAL(7, 0x1B, 12, 12, 12, 12), /* FDR */ - RXEQ_VAL(7, 0x1C, 12, 12, 12, 12), /* HDR */ - /* Set Preamp DC gain and Setting 1 (GFR/GHR) */ - RXEQ_VAL(7, 0x1E, 0x10, 0x10, 0x10, 0x10), /* FDR */ - RXEQ_VAL(7, 0x1F, 0x10, 0x10, 0x10, 0x10), /* HDR */ - /* Toggle RELOCK (in VCDL_CTRL0) to lock to data */ - RXEQ_VAL_ALL(6, 6, 0x20), /* Set D5 High */ - RXEQ_VAL_ALL(6, 6, 0), /* Set D5 Low */ -}; - -/* There are 17 values from vendor, but IBC only accesses the first 16 */ -#define DDS_ROWS (16) -#define RXEQ_ROWS ARRAY_SIZE(rxeq_init_vals) - -static int ipath_sd_setvals(struct ipath_devdata *dd) -{ - int idx, midx; - int min_idx; /* Minimum index for this portion of table */ - uint32_t dds_reg_map; - u64 __iomem *taddr, *iaddr; - uint64_t data; - uint64_t sdctl; - - taddr = dd->ipath_kregbase + KR_IBSerDesMappTable; - iaddr = dd->ipath_kregbase + dd->ipath_kregs->kr_ib_ddsrxeq; - - /* - * Init the DDS section of the table. - * Each "row" of the table provokes NUM_DDS_REG writes, to the - * registers indicated in DDS_REG_MAP. - */ - sdctl = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibserdesctrl); - sdctl = (sdctl & ~(0x1f << 8)) | (NUM_DDS_REGS << 8); - sdctl = (sdctl & ~(0x1f << 13)) | (RXEQ_ROWS << 13); - ipath_write_kreg(dd, dd->ipath_kregs->kr_ibserdesctrl, sdctl); - - /* - * Iterate down table within loop for each register to store. - */ - dds_reg_map = DDS_REG_MAP; - for (idx = 0; idx < NUM_DDS_REGS; ++idx) { - data = ((dds_reg_map & 0xF) << 4) | TX_FAST_ELT; - writeq(data, iaddr + idx); - mmiowb(); - ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch); - dds_reg_map >>= 4; - for (midx = 0; midx < DDS_ROWS; ++midx) { - u64 __iomem *daddr = taddr + ((midx << 4) + idx); - data = dds_init_vals[midx].reg_vals[idx]; - writeq(data, daddr); - mmiowb(); - ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch); - } /* End inner for (vals for this reg, each row) */ - } /* end outer for (regs to be stored) */ - - /* - * Init the RXEQ section of the table. As explained above the table - * rxeq_init_vals[], this runs in a different order, as the pattern - * of register references is more complex, but there are only - * four "data" values per register. - */ - min_idx = idx; /* RXEQ indices pick up where DDS left off */ - taddr += 0x100; /* RXEQ data is in second half of table */ - /* Iterate through RXEQ register addresses */ - for (idx = 0; idx < RXEQ_ROWS; ++idx) { - int didx; /* "destination" */ - int vidx; - - /* didx is offset by min_idx to address RXEQ range of regs */ - didx = idx + min_idx; - /* Store the next RXEQ register address */ - writeq(rxeq_init_vals[idx].rdesc, iaddr + didx); - mmiowb(); - ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch); - /* Iterate through RXEQ values */ - for (vidx = 0; vidx < 4; vidx++) { - data = rxeq_init_vals[idx].rdata[vidx]; - writeq(data, taddr + (vidx << 6) + idx); - mmiowb(); - ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch); - } - } /* end outer for (Reg-writes for RXEQ) */ - return 0; -} - -#define CMUCTRL5 EPB_LOC(7, 0, 0x15) -#define RXHSCTRL0(chan) EPB_LOC(chan, 6, 0) -#define VCDL_DAC2(chan) EPB_LOC(chan, 6, 5) -#define VCDL_CTRL0(chan) EPB_LOC(chan, 6, 6) -#define VCDL_CTRL2(chan) EPB_LOC(chan, 6, 8) -#define START_EQ2(chan) EPB_LOC(chan, 7, 0x28) - -static int ibsd_sto_noisy(struct ipath_devdata *dd, int loc, int val, int mask) -{ - int ret = -1; - int sloc; /* shifted loc, for messages */ - - loc |= (1U << EPB_IB_QUAD0_CS_SHF); - sloc = loc >> EPB_ADDR_SHF; - - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, loc, val, mask); - if (ret < 0) - ipath_dev_err(dd, "Write failed: elt %d," - " addr 0x%X, chnl %d, val 0x%02X, mask 0x%02X\n", - (sloc & 0xF), (sloc >> 9) & 0x3f, (sloc >> 4) & 7, - val & 0xFF, mask & 0xFF); - return ret; -} - -/* - * Repeat a "store" across all channels of the IB SerDes. - * Although nominally it inherits the "read value" of the last - * channel it modified, the only really useful return is <0 for - * failure, >= 0 for success. The parameter 'loc' is assumed to - * be the location for the channel-0 copy of the register to - * be modified. - */ -static int ibsd_mod_allchnls(struct ipath_devdata *dd, int loc, int val, - int mask) -{ - int ret = -1; - int chnl; - - if (loc & EPB_GLOBAL_WR) { - /* - * Our caller has assured us that we can set all four - * channels at once. Trust that. If mask is not 0xFF, - * we will read the _specified_ channel for our starting - * value. - */ - loc |= (1U << EPB_IB_QUAD0_CS_SHF); - chnl = (loc >> (4 + EPB_ADDR_SHF)) & 7; - if (mask != 0xFF) { - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, - loc & ~EPB_GLOBAL_WR, 0, 0); - if (ret < 0) { - int sloc = loc >> EPB_ADDR_SHF; - ipath_dev_err(dd, "pre-read failed: elt %d," - " addr 0x%X, chnl %d\n", (sloc & 0xF), - (sloc >> 9) & 0x3f, chnl); - return ret; - } - val = (ret & ~mask) | (val & mask); - } - loc &= ~(7 << (4+EPB_ADDR_SHF)); - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, loc, val, 0xFF); - if (ret < 0) { - int sloc = loc >> EPB_ADDR_SHF; - ipath_dev_err(dd, "Global WR failed: elt %d," - " addr 0x%X, val %02X\n", - (sloc & 0xF), (sloc >> 9) & 0x3f, val); - } - return ret; - } - /* Clear "channel" and set CS so we can simply iterate */ - loc &= ~(7 << (4+EPB_ADDR_SHF)); - loc |= (1U << EPB_IB_QUAD0_CS_SHF); - for (chnl = 0; chnl < 4; ++chnl) { - int cloc; - cloc = loc | (chnl << (4+EPB_ADDR_SHF)); - ret = ipath_sd7220_reg_mod(dd, IB_7220_SERDES, cloc, val, mask); - if (ret < 0) { - int sloc = loc >> EPB_ADDR_SHF; - ipath_dev_err(dd, "Write failed: elt %d," - " addr 0x%X, chnl %d, val 0x%02X," - " mask 0x%02X\n", - (sloc & 0xF), (sloc >> 9) & 0x3f, chnl, - val & 0xFF, mask & 0xFF); - break; - } - } - return ret; -} - -/* - * Set the Tx values normally modified by IBC in IB1.2 mode to default - * values, as gotten from first row of init table. - */ -static int set_dds_vals(struct ipath_devdata *dd, struct dds_init *ddi) -{ - int ret; - int idx, reg, data; - uint32_t regmap; - - regmap = DDS_REG_MAP; - for (idx = 0; idx < NUM_DDS_REGS; ++idx) { - reg = (regmap & 0xF); - regmap >>= 4; - data = ddi->reg_vals[idx]; - /* Vendor says RMW not needed for these regs, use 0xFF mask */ - ret = ibsd_mod_allchnls(dd, EPB_LOC(0, 9, reg), data, 0xFF); - if (ret < 0) - break; - } - return ret; -} - -/* - * Set the Rx values normally modified by IBC in IB1.2 mode to default - * values, as gotten from selected column of init table. - */ -static int set_rxeq_vals(struct ipath_devdata *dd, int vsel) -{ - int ret; - int ridx; - int cnt = ARRAY_SIZE(rxeq_init_vals); - - for (ridx = 0; ridx < cnt; ++ridx) { - int elt, reg, val, loc; - elt = rxeq_init_vals[ridx].rdesc & 0xF; - reg = rxeq_init_vals[ridx].rdesc >> 4; - loc = EPB_LOC(0, elt, reg); - val = rxeq_init_vals[ridx].rdata[vsel]; - /* mask of 0xFF, because hardware does full-byte store. */ - ret = ibsd_mod_allchnls(dd, loc, val, 0xFF); - if (ret < 0) - break; - } - return ret; -} - -/* - * Set the default values (row 0) for DDR Driver Demphasis. - * we do this initially and whenever we turn off IB-1.2 - * The "default" values for Rx equalization are also stored to - * SerDes registers. Formerly (and still default), we used set 2. - * For experimenting with cables and link-partners, we allow changing - * that via a module parameter. - */ -static unsigned ipath_rxeq_set = 2; -module_param_named(rxeq_default_set, ipath_rxeq_set, uint, - S_IWUSR | S_IRUGO); -MODULE_PARM_DESC(rxeq_default_set, - "Which set [0..3] of Rx Equalization values is default"); - -static int ipath_internal_presets(struct ipath_devdata *dd) -{ - int ret = 0; - - ret = set_dds_vals(dd, dds_init_vals + DDS_3M); - - if (ret < 0) - ipath_dev_err(dd, "Failed to set default DDS values\n"); - ret = set_rxeq_vals(dd, ipath_rxeq_set & 3); - if (ret < 0) - ipath_dev_err(dd, "Failed to set default RXEQ values\n"); - return ret; -} - -int ipath_sd7220_presets(struct ipath_devdata *dd) -{ - int ret = 0; - - if (!dd->ipath_presets_needed) - return ret; - dd->ipath_presets_needed = 0; - /* Assert uC reset, so we don't clash with it. */ - ipath_ibsd_reset(dd, 1); - udelay(2); - ipath_sd_trimdone_monitor(dd, "link-down"); - - ret = ipath_internal_presets(dd); -return ret; -} - -static int ipath_sd_trimself(struct ipath_devdata *dd, int val) -{ - return ibsd_sto_noisy(dd, CMUCTRL5, val, 0xFF); -} - -static int ipath_sd_early(struct ipath_devdata *dd) -{ - int ret = -1; /* Default failed */ - int chnl; - - for (chnl = 0; chnl < 4; ++chnl) { - ret = ibsd_sto_noisy(dd, RXHSCTRL0(chnl), 0xD4, 0xFF); - if (ret < 0) - goto bail; - } - for (chnl = 0; chnl < 4; ++chnl) { - ret = ibsd_sto_noisy(dd, VCDL_DAC2(chnl), 0x2D, 0xFF); - if (ret < 0) - goto bail; - } - /* more fine-tuning of what will be default */ - for (chnl = 0; chnl < 4; ++chnl) { - ret = ibsd_sto_noisy(dd, VCDL_CTRL2(chnl), 3, 0xF); - if (ret < 0) - goto bail; - } - for (chnl = 0; chnl < 4; ++chnl) { - ret = ibsd_sto_noisy(dd, START_EQ1(chnl), 0x10, 0xFF); - if (ret < 0) - goto bail; - } - for (chnl = 0; chnl < 4; ++chnl) { - ret = ibsd_sto_noisy(dd, START_EQ2(chnl), 0x30, 0xFF); - if (ret < 0) - goto bail; - } -bail: - return ret; -} - -#define BACTRL(chnl) EPB_LOC(chnl, 6, 0x0E) -#define LDOUTCTRL1(chnl) EPB_LOC(chnl, 7, 6) -#define RXHSSTATUS(chnl) EPB_LOC(chnl, 6, 0xF) - -static int ipath_sd_dactrim(struct ipath_devdata *dd) -{ - int ret = -1; /* Default failed */ - int chnl; - - for (chnl = 0; chnl < 4; ++chnl) { - ret = ibsd_sto_noisy(dd, BACTRL(chnl), 0x40, 0xFF); - if (ret < 0) - goto bail; - } - for (chnl = 0; chnl < 4; ++chnl) { - ret = ibsd_sto_noisy(dd, LDOUTCTRL1(chnl), 0x04, 0xFF); - if (ret < 0) - goto bail; - } - for (chnl = 0; chnl < 4; ++chnl) { - ret = ibsd_sto_noisy(dd, RXHSSTATUS(chnl), 0x04, 0xFF); - if (ret < 0) - goto bail; - } - /* - * delay for max possible number of steps, with slop. - * Each step is about 4usec. - */ - udelay(415); - for (chnl = 0; chnl < 4; ++chnl) { - ret = ibsd_sto_noisy(dd, LDOUTCTRL1(chnl), 0x00, 0xFF); - if (ret < 0) - goto bail; - } -bail: - return ret; -} - -#define RELOCK_FIRST_MS 3 -#define RXLSPPM(chan) EPB_LOC(chan, 0, 2) -void ipath_toggle_rclkrls(struct ipath_devdata *dd) -{ - int loc = RXLSPPM(0) | EPB_GLOBAL_WR; - int ret; - - ret = ibsd_mod_allchnls(dd, loc, 0, 0x80); - if (ret < 0) - ipath_dev_err(dd, "RCLKRLS failed to clear D7\n"); - else { - udelay(1); - ibsd_mod_allchnls(dd, loc, 0x80, 0x80); - } - /* And again for good measure */ - udelay(1); - ret = ibsd_mod_allchnls(dd, loc, 0, 0x80); - if (ret < 0) - ipath_dev_err(dd, "RCLKRLS failed to clear D7\n"); - else { - udelay(1); - ibsd_mod_allchnls(dd, loc, 0x80, 0x80); - } - /* Now reset xgxs and IBC to complete the recovery */ - dd->ipath_f_xgxs_reset(dd); -} - -/* - * Shut down the timer that polls for relock occasions, if needed - * this is "hooked" from ipath_7220_quiet_serdes(), which is called - * just before ipath_shutdown_device() in ipath_driver.c shuts down all - * the other timers - */ -void ipath_shutdown_relock_poll(struct ipath_devdata *dd) -{ - struct ipath_relock *irp = &dd->ipath_relock_singleton; - if (atomic_read(&irp->ipath_relock_timer_active)) { - del_timer_sync(&irp->ipath_relock_timer); - atomic_set(&irp->ipath_relock_timer_active, 0); - } -} - -static unsigned ipath_relock_by_timer = 1; -module_param_named(relock_by_timer, ipath_relock_by_timer, uint, - S_IWUSR | S_IRUGO); -MODULE_PARM_DESC(relock_by_timer, "Allow relock attempt if link not up"); - -static void ipath_run_relock(unsigned long opaque) -{ - struct ipath_devdata *dd = (struct ipath_devdata *)opaque; - struct ipath_relock *irp = &dd->ipath_relock_singleton; - u64 val, ltstate; - - if (!(dd->ipath_flags & IPATH_INITTED)) { - /* Not yet up, just reenable the timer for later */ - irp->ipath_relock_interval = HZ; - mod_timer(&irp->ipath_relock_timer, jiffies + HZ); - return; - } - - /* - * Check link-training state for "stuck" state. - * if found, try relock and schedule another try at - * exponentially growing delay, maxed at one second. - * if not stuck, our work is done. - */ - val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_ibcstatus); - ltstate = ipath_ib_linktrstate(dd, val); - - if (ltstate <= INFINIPATH_IBCS_LT_STATE_CFGWAITRMT - && ltstate != INFINIPATH_IBCS_LT_STATE_LINKUP) { - int timeoff; - /* Not up yet. Try again, if allowed by module-param */ - if (ipath_relock_by_timer) { - if (dd->ipath_flags & IPATH_IB_AUTONEG_INPROG) - ipath_cdbg(VERBOSE, "Skip RELOCK in AUTONEG\n"); - else if (!(dd->ipath_flags & IPATH_IB_LINK_DISABLED)) { - ipath_cdbg(VERBOSE, "RELOCK\n"); - ipath_toggle_rclkrls(dd); - } - } - /* re-set timer for next check */ - timeoff = irp->ipath_relock_interval << 1; - if (timeoff > HZ) - timeoff = HZ; - irp->ipath_relock_interval = timeoff; - - mod_timer(&irp->ipath_relock_timer, jiffies + timeoff); - } else { - /* Up, so no more need to check so often */ - mod_timer(&irp->ipath_relock_timer, jiffies + HZ); - } -} - -void ipath_set_relock_poll(struct ipath_devdata *dd, int ibup) -{ - struct ipath_relock *irp = &dd->ipath_relock_singleton; - - if (ibup > 0) { - /* we are now up, so relax timer to 1 second interval */ - if (atomic_read(&irp->ipath_relock_timer_active)) - mod_timer(&irp->ipath_relock_timer, jiffies + HZ); - } else { - /* Transition to down, (re-)set timer to short interval. */ - int timeout; - timeout = (HZ * ((ibup == -1) ? 1000 : RELOCK_FIRST_MS))/1000; - if (timeout == 0) - timeout = 1; - /* If timer has not yet been started, do so. */ - if (atomic_inc_return(&irp->ipath_relock_timer_active) == 1) { - init_timer(&irp->ipath_relock_timer); - irp->ipath_relock_timer.function = ipath_run_relock; - irp->ipath_relock_timer.data = (unsigned long) dd; - irp->ipath_relock_interval = timeout; - irp->ipath_relock_timer.expires = jiffies + timeout; - add_timer(&irp->ipath_relock_timer); - } else { - irp->ipath_relock_interval = timeout; - mod_timer(&irp->ipath_relock_timer, jiffies + timeout); - atomic_dec(&irp->ipath_relock_timer_active); - } - } -} - |
