// SPDX-License-Identifier: GPL-2.0-only
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/*
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* IBM Accelerator Family 'GenWQE'
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*
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* (C) Copyright IBM Corp. 2013
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*
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* Author: Frank Haverkamp <haver@linux.vnet.ibm.com>
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* Author: Joerg-Stephan Vogt <jsvogt@de.ibm.com>
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* Author: Michael Jung <mijung@gmx.net>
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* Author: Michael Ruettger <michael@ibmra.de>
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*/
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/*
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* Sysfs interfaces for the GenWQE card. There are attributes to query
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* the version of the bitstream as well as some for the driver. For
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* debugging, please also see the debugfs interfaces of this driver.
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/string.h>
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#include <linux/fs.h>
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#include <linux/sysfs.h>
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#include <linux/ctype.h>
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#include <linux/device.h>
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#include "card_base.h"
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#include "card_ddcb.h"
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static const char * const genwqe_types[] = {
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[GENWQE_TYPE_ALTERA_230] = "GenWQE4-230",
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[GENWQE_TYPE_ALTERA_530] = "GenWQE4-530",
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[GENWQE_TYPE_ALTERA_A4] = "GenWQE5-A4",
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[GENWQE_TYPE_ALTERA_A7] = "GenWQE5-A7",
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};
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static ssize_t status_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct genwqe_dev *cd = dev_get_drvdata(dev);
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const char *cs[GENWQE_CARD_STATE_MAX] = { "unused", "used", "error" };
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return sprintf(buf, "%s\n", cs[cd->card_state]);
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}
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static DEVICE_ATTR_RO(status);
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static ssize_t appid_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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char app_name[5];
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struct genwqe_dev *cd = dev_get_drvdata(dev);
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genwqe_read_app_id(cd, app_name, sizeof(app_name));
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return sprintf(buf, "%s\n", app_name);
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}
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static DEVICE_ATTR_RO(appid);
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static ssize_t version_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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u64 slu_id, app_id;
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struct genwqe_dev *cd = dev_get_drvdata(dev);
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slu_id = __genwqe_readq(cd, IO_SLU_UNITCFG);
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app_id = __genwqe_readq(cd, IO_APP_UNITCFG);
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return sprintf(buf, "%016llx.%016llx\n", slu_id, app_id);
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}
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static DEVICE_ATTR_RO(version);
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static ssize_t type_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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u8 card_type;
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struct genwqe_dev *cd = dev_get_drvdata(dev);
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card_type = genwqe_card_type(cd);
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return sprintf(buf, "%s\n", (card_type >= ARRAY_SIZE(genwqe_types)) ?
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"invalid" : genwqe_types[card_type]);
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}
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static DEVICE_ATTR_RO(type);
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static ssize_t tempsens_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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u64 tempsens;
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struct genwqe_dev *cd = dev_get_drvdata(dev);
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tempsens = __genwqe_readq(cd, IO_SLU_TEMPERATURE_SENSOR);
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return sprintf(buf, "%016llx\n", tempsens);
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}
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static DEVICE_ATTR_RO(tempsens);
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static ssize_t freerunning_timer_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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u64 t;
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struct genwqe_dev *cd = dev_get_drvdata(dev);
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t = __genwqe_readq(cd, IO_SLC_FREE_RUNNING_TIMER);
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return sprintf(buf, "%016llx\n", t);
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}
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static DEVICE_ATTR_RO(freerunning_timer);
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static ssize_t queue_working_time_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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u64 t;
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struct genwqe_dev *cd = dev_get_drvdata(dev);
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t = __genwqe_readq(cd, IO_SLC_QUEUE_WTIME);
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return sprintf(buf, "%016llx\n", t);
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}
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static DEVICE_ATTR_RO(queue_working_time);
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static ssize_t base_clock_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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u64 base_clock;
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struct genwqe_dev *cd = dev_get_drvdata(dev);
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base_clock = genwqe_base_clock_frequency(cd);
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return sprintf(buf, "%lld\n", base_clock);
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}
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static DEVICE_ATTR_RO(base_clock);
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/*
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* curr_bitstream_show() - Show the current bitstream id
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*
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* There is a bug in some old versions of the CPLD which selects the
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* bitstream, which causes the IO_SLU_BITSTREAM register to report
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* unreliable data in very rare cases. This makes this sysfs
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* unreliable up to the point were a new CPLD version is being used.
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*
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* Unfortunately there is no automatic way yet to query the CPLD
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* version, such that you need to manually ensure via programming
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* tools that you have a recent version of the CPLD software.
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*
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* The proposed circumvention is to use a special recovery bitstream
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* on the backup partition (0) to identify problems while loading the
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* image.
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*/
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static ssize_t curr_bitstream_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int curr_bitstream;
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struct genwqe_dev *cd = dev_get_drvdata(dev);
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curr_bitstream = __genwqe_readq(cd, IO_SLU_BITSTREAM) & 0x1;
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return sprintf(buf, "%d\n", curr_bitstream);
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}
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static DEVICE_ATTR_RO(curr_bitstream);
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/*
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* next_bitstream_show() - Show the next activated bitstream
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*
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* IO_SLC_CFGREG_SOFTRESET: This register can only be accessed by the PF.
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*/
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static ssize_t next_bitstream_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int next_bitstream;
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struct genwqe_dev *cd = dev_get_drvdata(dev);
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switch ((cd->softreset & 0xc) >> 2) {
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case 0x2:
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next_bitstream = 0;
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break;
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case 0x3:
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next_bitstream = 1;
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break;
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default:
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next_bitstream = -1;
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break; /* error */
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}
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return sprintf(buf, "%d\n", next_bitstream);
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}
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static ssize_t next_bitstream_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int partition;
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struct genwqe_dev *cd = dev_get_drvdata(dev);
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if (kstrtoint(buf, 0, &partition) < 0)
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return -EINVAL;
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switch (partition) {
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case 0x0:
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cd->softreset = 0x78;
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break;
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case 0x1:
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cd->softreset = 0x7c;
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break;
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default:
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return -EINVAL;
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}
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__genwqe_writeq(cd, IO_SLC_CFGREG_SOFTRESET, cd->softreset);
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return count;
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}
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static DEVICE_ATTR_RW(next_bitstream);
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static ssize_t reload_bitstream_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int reload;
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struct genwqe_dev *cd = dev_get_drvdata(dev);
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if (kstrtoint(buf, 0, &reload) < 0)
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return -EINVAL;
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if (reload == 0x1) {
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if (cd->card_state == GENWQE_CARD_UNUSED ||
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cd->card_state == GENWQE_CARD_USED)
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cd->card_state = GENWQE_CARD_RELOAD_BITSTREAM;
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else
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return -EIO;
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} else {
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return -EINVAL;
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}
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return count;
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}
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static DEVICE_ATTR_WO(reload_bitstream);
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/*
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* Create device_attribute structures / params: name, mode, show, store
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* additional flag if valid in VF
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*/
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static struct attribute *genwqe_attributes[] = {
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&dev_attr_tempsens.attr,
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&dev_attr_next_bitstream.attr,
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&dev_attr_curr_bitstream.attr,
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&dev_attr_base_clock.attr,
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&dev_attr_type.attr,
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&dev_attr_version.attr,
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&dev_attr_appid.attr,
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&dev_attr_status.attr,
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&dev_attr_freerunning_timer.attr,
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&dev_attr_queue_working_time.attr,
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&dev_attr_reload_bitstream.attr,
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NULL,
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};
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static struct attribute *genwqe_normal_attributes[] = {
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&dev_attr_type.attr,
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&dev_attr_version.attr,
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&dev_attr_appid.attr,
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&dev_attr_status.attr,
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&dev_attr_freerunning_timer.attr,
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&dev_attr_queue_working_time.attr,
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NULL,
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};
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/*
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* genwqe_is_visible() - Determine if sysfs attribute should be visible or not
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*
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* VFs have restricted mmio capabilities, so not all sysfs entries
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* are allowed in VFs.
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*/
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static umode_t genwqe_is_visible(struct kobject *kobj,
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struct attribute *attr, int n)
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{
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unsigned int j;
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struct device *dev = kobj_to_dev(kobj);
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struct genwqe_dev *cd = dev_get_drvdata(dev);
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umode_t mode = attr->mode;
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if (genwqe_is_privileged(cd))
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return mode;
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for (j = 0; genwqe_normal_attributes[j] != NULL; j++)
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if (genwqe_normal_attributes[j] == attr)
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return mode;
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return 0;
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}
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static struct attribute_group genwqe_attribute_group = {
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.is_visible = genwqe_is_visible,
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.attrs = genwqe_attributes,
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};
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const struct attribute_group *genwqe_attribute_groups[] = {
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&genwqe_attribute_group,
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NULL,
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};
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