From 34ff636f322c6d5e4f0a52338fa63a7dff09a495 Mon Sep 17 00:00:00 2001 From: Joel Fernandes Date: Sat, 18 Jul 2026 13:15:36 -0400 Subject: scftorture: Count single_rpc offline failures in statistics output scf_torture_stats_print() aggregates each invoker thread's counters into a local scf_statistics structure before printing, but the n_single_rpc_ofl field is missing from the aggregation loop. As a result, the "single_rpc_ofl" value printed in the statistics line is always zero, even when smp_call_function_single() invocations for the RPC test have failed due to offline CPUs and been counted by the invoker threads. Add the missing accumulation so that the printed value reflects the actual counts. Signed-off-by: Joel Fernandes Signed-off-by: Paul E. McKenney --- drivers/tc/tc.c | 208 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 208 insertions(+) create mode 100644 drivers/tc/tc.c (limited to 'drivers/tc/tc.c') diff --git a/drivers/tc/tc.c b/drivers/tc/tc.c new file mode 100644 index 000000000..ebc835cf1 --- /dev/null +++ b/drivers/tc/tc.c @@ -0,0 +1,208 @@ +/* + * TURBOchannel bus services. + * + * Copyright (c) Harald Koerfgen, 1998 + * Copyright (c) 2001, 2003, 2005, 2006, 2018 Maciej W. Rozycki + * Copyright (c) 2005 James Simmons + * + * This file is subject to the terms and conditions of the GNU + * General Public License. See the file "COPYING" in the main + * directory of this archive for more details. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +static struct tc_bus tc_bus = { + .name = "TURBOchannel", +}; + +/* + * Probing for TURBOchannel modules. + */ +static void __init tc_bus_add_devices(struct tc_bus *tbus) +{ + resource_size_t slotsize = tbus->info.slot_size << 20; + resource_size_t extslotsize = tbus->ext_slot_size; + resource_size_t slotaddr; + resource_size_t extslotaddr; + resource_size_t devsize; + void __iomem *module; + struct tc_dev *tdev; + int i, slot, err; + u8 pattern[4]; + long offset; + + for (slot = 0; slot < tbus->num_tcslots; slot++) { + slotaddr = tbus->slot_base + slot * slotsize; + extslotaddr = tbus->ext_slot_base + slot * extslotsize; + module = ioremap(slotaddr, slotsize); + BUG_ON(!module); + + offset = TC_OLDCARD; + + err = 0; + err |= tc_preadb(pattern + 0, module + offset + TC_PATTERN0); + err |= tc_preadb(pattern + 1, module + offset + TC_PATTERN1); + err |= tc_preadb(pattern + 2, module + offset + TC_PATTERN2); + err |= tc_preadb(pattern + 3, module + offset + TC_PATTERN3); + if (err) + goto out_err; + + if (pattern[0] != 0x55 || pattern[1] != 0x00 || + pattern[2] != 0xaa || pattern[3] != 0xff) { + offset = TC_NEWCARD; + + err = 0; + err |= tc_preadb(pattern + 0, + module + offset + TC_PATTERN0); + err |= tc_preadb(pattern + 1, + module + offset + TC_PATTERN1); + err |= tc_preadb(pattern + 2, + module + offset + TC_PATTERN2); + err |= tc_preadb(pattern + 3, + module + offset + TC_PATTERN3); + if (err) + goto out_err; + } + + if (pattern[0] != 0x55 || pattern[1] != 0x00 || + pattern[2] != 0xaa || pattern[3] != 0xff) + goto out_err; + + /* Found a board, allocate it an entry in the list */ + tdev = kzalloc_obj(*tdev); + if (!tdev) { + pr_err("tc%x: unable to allocate tc_dev\n", slot); + goto out_err; + } + dev_set_name(&tdev->dev, "tc%x", slot); + tdev->bus = tbus; + tdev->dev.parent = &tbus->dev; + tdev->dev.bus = &tc_bus_type; + tdev->slot = slot; + + /* TURBOchannel has 34-bit DMA addressing (16GiB space). */ + tdev->dma_mask = DMA_BIT_MASK(34); + tdev->dev.dma_mask = &tdev->dma_mask; + tdev->dev.coherent_dma_mask = DMA_BIT_MASK(34); + + for (i = 0; i < 8; i++) { + tdev->firmware[i] = + readb(module + offset + TC_FIRM_VER + 4 * i); + tdev->vendor[i] = + readb(module + offset + TC_VENDOR + 4 * i); + tdev->name[i] = + readb(module + offset + TC_MODULE + 4 * i); + } + tdev->firmware[8] = 0; + tdev->vendor[8] = 0; + tdev->name[8] = 0; + + pr_info("%s: %s %s %s\n", dev_name(&tdev->dev), tdev->vendor, + tdev->name, tdev->firmware); + + devsize = readb(module + offset + TC_SLOT_SIZE); + devsize <<= 22; + if (devsize <= slotsize) { + tdev->resource.start = slotaddr; + tdev->resource.end = slotaddr + devsize - 1; + } else if (devsize <= extslotsize) { + tdev->resource.start = extslotaddr; + tdev->resource.end = extslotaddr + devsize - 1; + } else { + pr_err("%s: Cannot provide slot space " + "(%ldMiB required, up to %ldMiB supported)\n", + dev_name(&tdev->dev), (long)(devsize >> 20), + (long)(max(slotsize, extslotsize) >> 20)); + kfree(tdev); + goto out_err; + } + tdev->resource.name = tdev->name; + tdev->resource.flags = IORESOURCE_MEM; + + tc_device_get_irq(tdev); + + if (device_register(&tdev->dev)) { + put_device(&tdev->dev); + goto out_err; + } + list_add_tail(&tdev->node, &tbus->devices); + +out_err: + iounmap(module); + } +} + +/* + * The main entry. + */ +static int __init tc_init(void) +{ + /* Initialize the TURBOchannel bus */ + if (tc_bus_get_info(&tc_bus)) + goto out_err; + + INIT_LIST_HEAD(&tc_bus.devices); + dev_set_name(&tc_bus.dev, "tc"); + if (device_register(&tc_bus.dev)) + goto out_err_device; + + if (tc_bus.info.slot_size) { + unsigned int tc_clock = tc_get_speed(&tc_bus) / 100000; + + pr_info("tc: TURBOchannel rev. %d at %u.%u MHz " + "(with%s parity)\n", tc_bus.info.revision, + tc_clock / 10, tc_clock % 10, + tc_bus.info.parity ? "" : "out"); + + tc_bus.resource[0].start = tc_bus.slot_base; + tc_bus.resource[0].end = tc_bus.slot_base + + (tc_bus.info.slot_size << 20) * + tc_bus.num_tcslots - 1; + tc_bus.resource[0].name = tc_bus.name; + tc_bus.resource[0].flags = IORESOURCE_MEM; + if (request_resource(&iomem_resource, + &tc_bus.resource[0]) < 0) { + pr_err("tc: Cannot reserve resource\n"); + goto out_err_device; + } + if (tc_bus.ext_slot_size) { + tc_bus.resource[1].start = tc_bus.ext_slot_base; + tc_bus.resource[1].end = tc_bus.ext_slot_base + + tc_bus.ext_slot_size * + tc_bus.num_tcslots - 1; + tc_bus.resource[1].name = tc_bus.name; + tc_bus.resource[1].flags = IORESOURCE_MEM; + if (request_resource(&iomem_resource, + &tc_bus.resource[1]) < 0) { + pr_err("tc: Cannot reserve resource\n"); + goto out_err_resource; + } + } + + tc_bus_add_devices(&tc_bus); + } + + return 0; + +out_err_resource: + release_resource(&tc_bus.resource[0]); +out_err_device: + put_device(&tc_bus.dev); +out_err: + return 0; +} + +subsys_initcall(tc_init); -- cgit v1.3.1