386 lines
8.9 KiB
C
386 lines
8.9 KiB
C
/*
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* Copyright 2014 IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/sysfs.h>
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#include "cxl.h"
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#define to_afu_chardev_m(d) dev_get_drvdata(d)
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/********* Adapter attributes **********************************************/
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static ssize_t caia_version_show(struct device *device,
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struct device_attribute *attr,
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char *buf)
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{
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struct cxl *adapter = to_cxl_adapter(device);
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return scnprintf(buf, PAGE_SIZE, "%i.%i\n", adapter->caia_major,
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adapter->caia_minor);
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}
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static ssize_t psl_revision_show(struct device *device,
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struct device_attribute *attr,
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char *buf)
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{
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struct cxl *adapter = to_cxl_adapter(device);
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return scnprintf(buf, PAGE_SIZE, "%i\n", adapter->psl_rev);
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}
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static ssize_t base_image_show(struct device *device,
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struct device_attribute *attr,
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char *buf)
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{
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struct cxl *adapter = to_cxl_adapter(device);
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return scnprintf(buf, PAGE_SIZE, "%i\n", adapter->base_image);
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}
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static ssize_t image_loaded_show(struct device *device,
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struct device_attribute *attr,
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char *buf)
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{
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struct cxl *adapter = to_cxl_adapter(device);
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if (adapter->user_image_loaded)
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return scnprintf(buf, PAGE_SIZE, "user\n");
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return scnprintf(buf, PAGE_SIZE, "factory\n");
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}
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static struct device_attribute adapter_attrs[] = {
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__ATTR_RO(caia_version),
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__ATTR_RO(psl_revision),
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__ATTR_RO(base_image),
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__ATTR_RO(image_loaded),
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};
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/********* AFU master specific attributes **********************************/
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static ssize_t mmio_size_show_master(struct device *device,
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struct device_attribute *attr,
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char *buf)
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{
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struct cxl_afu *afu = to_afu_chardev_m(device);
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return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->adapter->ps_size);
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}
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static ssize_t pp_mmio_off_show(struct device *device,
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struct device_attribute *attr,
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char *buf)
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{
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struct cxl_afu *afu = to_afu_chardev_m(device);
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return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->pp_offset);
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}
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static ssize_t pp_mmio_len_show(struct device *device,
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struct device_attribute *attr,
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char *buf)
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{
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struct cxl_afu *afu = to_afu_chardev_m(device);
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return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->pp_size);
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}
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static struct device_attribute afu_master_attrs[] = {
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__ATTR(mmio_size, S_IRUGO, mmio_size_show_master, NULL),
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__ATTR_RO(pp_mmio_off),
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__ATTR_RO(pp_mmio_len),
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};
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/********* AFU attributes **************************************************/
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static ssize_t mmio_size_show(struct device *device,
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struct device_attribute *attr,
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char *buf)
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{
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struct cxl_afu *afu = to_cxl_afu(device);
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if (afu->pp_size)
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return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->pp_size);
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return scnprintf(buf, PAGE_SIZE, "%llu\n", afu->adapter->ps_size);
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}
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static ssize_t reset_store_afu(struct device *device,
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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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struct cxl_afu *afu = to_cxl_afu(device);
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int rc;
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/* Not safe to reset if it is currently in use */
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mutex_lock(&afu->contexts_lock);
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if (!idr_is_empty(&afu->contexts_idr)) {
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rc = -EBUSY;
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goto err;
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}
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if ((rc = cxl_afu_reset(afu)))
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goto err;
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rc = count;
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err:
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mutex_unlock(&afu->contexts_lock);
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return rc;
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}
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static ssize_t irqs_min_show(struct device *device,
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struct device_attribute *attr,
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char *buf)
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{
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struct cxl_afu *afu = to_cxl_afu(device);
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return scnprintf(buf, PAGE_SIZE, "%i\n", afu->pp_irqs);
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}
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static ssize_t irqs_max_show(struct device *device,
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struct device_attribute *attr,
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char *buf)
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{
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struct cxl_afu *afu = to_cxl_afu(device);
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return scnprintf(buf, PAGE_SIZE, "%i\n", afu->irqs_max);
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}
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static ssize_t irqs_max_store(struct device *device,
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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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struct cxl_afu *afu = to_cxl_afu(device);
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ssize_t ret;
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int irqs_max;
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ret = sscanf(buf, "%i", &irqs_max);
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if (ret != 1)
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return -EINVAL;
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if (irqs_max < afu->pp_irqs)
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return -EINVAL;
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if (irqs_max > afu->adapter->user_irqs)
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return -EINVAL;
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afu->irqs_max = irqs_max;
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return count;
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}
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static ssize_t modes_supported_show(struct device *device,
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struct device_attribute *attr, char *buf)
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{
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struct cxl_afu *afu = to_cxl_afu(device);
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char *p = buf, *end = buf + PAGE_SIZE;
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if (afu->modes_supported & CXL_MODE_DEDICATED)
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p += scnprintf(p, end - p, "dedicated_process\n");
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if (afu->modes_supported & CXL_MODE_DIRECTED)
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p += scnprintf(p, end - p, "afu_directed\n");
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return (p - buf);
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}
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static ssize_t prefault_mode_show(struct device *device,
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struct device_attribute *attr,
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char *buf)
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{
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struct cxl_afu *afu = to_cxl_afu(device);
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switch (afu->prefault_mode) {
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case CXL_PREFAULT_WED:
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return scnprintf(buf, PAGE_SIZE, "work_element_descriptor\n");
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case CXL_PREFAULT_ALL:
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return scnprintf(buf, PAGE_SIZE, "all\n");
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default:
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return scnprintf(buf, PAGE_SIZE, "none\n");
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}
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}
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static ssize_t prefault_mode_store(struct device *device,
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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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struct cxl_afu *afu = to_cxl_afu(device);
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enum prefault_modes mode = -1;
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if (!strncmp(buf, "work_element_descriptor", 23))
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mode = CXL_PREFAULT_WED;
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if (!strncmp(buf, "all", 3))
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mode = CXL_PREFAULT_ALL;
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if (!strncmp(buf, "none", 4))
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mode = CXL_PREFAULT_NONE;
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if (mode == -1)
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return -EINVAL;
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afu->prefault_mode = mode;
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return count;
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}
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static ssize_t mode_show(struct device *device,
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struct device_attribute *attr,
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char *buf)
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{
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struct cxl_afu *afu = to_cxl_afu(device);
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if (afu->current_mode == CXL_MODE_DEDICATED)
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return scnprintf(buf, PAGE_SIZE, "dedicated_process\n");
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if (afu->current_mode == CXL_MODE_DIRECTED)
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return scnprintf(buf, PAGE_SIZE, "afu_directed\n");
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return scnprintf(buf, PAGE_SIZE, "none\n");
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}
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static ssize_t mode_store(struct device *device, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct cxl_afu *afu = to_cxl_afu(device);
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int old_mode, mode = -1;
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int rc = -EBUSY;
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/* can't change this if we have a user */
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mutex_lock(&afu->contexts_lock);
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if (!idr_is_empty(&afu->contexts_idr))
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goto err;
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if (!strncmp(buf, "dedicated_process", 17))
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mode = CXL_MODE_DEDICATED;
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if (!strncmp(buf, "afu_directed", 12))
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mode = CXL_MODE_DIRECTED;
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if (!strncmp(buf, "none", 4))
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mode = 0;
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if (mode == -1) {
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rc = -EINVAL;
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goto err;
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}
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/*
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* cxl_afu_deactivate_mode needs to be done outside the lock, prevent
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* other contexts coming in before we are ready:
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*/
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old_mode = afu->current_mode;
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afu->current_mode = 0;
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afu->num_procs = 0;
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mutex_unlock(&afu->contexts_lock);
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if ((rc = _cxl_afu_deactivate_mode(afu, old_mode)))
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return rc;
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if ((rc = cxl_afu_activate_mode(afu, mode)))
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return rc;
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return count;
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err:
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mutex_unlock(&afu->contexts_lock);
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return rc;
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}
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static ssize_t api_version_show(struct device *device,
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struct device_attribute *attr,
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char *buf)
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{
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return scnprintf(buf, PAGE_SIZE, "%i\n", CXL_API_VERSION);
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}
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static ssize_t api_version_compatible_show(struct device *device,
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struct device_attribute *attr,
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char *buf)
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{
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return scnprintf(buf, PAGE_SIZE, "%i\n", CXL_API_VERSION_COMPATIBLE);
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}
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static struct device_attribute afu_attrs[] = {
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__ATTR_RO(mmio_size),
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__ATTR_RO(irqs_min),
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__ATTR_RW(irqs_max),
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__ATTR_RO(modes_supported),
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__ATTR_RW(mode),
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__ATTR_RW(prefault_mode),
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__ATTR_RO(api_version),
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__ATTR_RO(api_version_compatible),
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__ATTR(reset, S_IWUSR, NULL, reset_store_afu),
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};
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int cxl_sysfs_adapter_add(struct cxl *adapter)
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{
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int i, rc;
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for (i = 0; i < ARRAY_SIZE(adapter_attrs); i++) {
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if ((rc = device_create_file(&adapter->dev, &adapter_attrs[i])))
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goto err;
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}
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return 0;
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err:
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for (i--; i >= 0; i--)
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device_remove_file(&adapter->dev, &adapter_attrs[i]);
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return rc;
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}
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void cxl_sysfs_adapter_remove(struct cxl *adapter)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(adapter_attrs); i++)
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device_remove_file(&adapter->dev, &adapter_attrs[i]);
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}
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int cxl_sysfs_afu_add(struct cxl_afu *afu)
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{
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int i, rc;
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for (i = 0; i < ARRAY_SIZE(afu_attrs); i++) {
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if ((rc = device_create_file(&afu->dev, &afu_attrs[i])))
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goto err;
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}
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return 0;
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err:
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for (i--; i >= 0; i--)
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device_remove_file(&afu->dev, &afu_attrs[i]);
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return rc;
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}
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void cxl_sysfs_afu_remove(struct cxl_afu *afu)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(afu_attrs); i++)
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device_remove_file(&afu->dev, &afu_attrs[i]);
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}
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int cxl_sysfs_afu_m_add(struct cxl_afu *afu)
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{
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int i, rc;
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for (i = 0; i < ARRAY_SIZE(afu_master_attrs); i++) {
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if ((rc = device_create_file(afu->chardev_m, &afu_master_attrs[i])))
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goto err;
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}
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return 0;
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err:
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for (i--; i >= 0; i--)
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device_remove_file(afu->chardev_m, &afu_master_attrs[i]);
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return rc;
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}
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void cxl_sysfs_afu_m_remove(struct cxl_afu *afu)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(afu_master_attrs); i++)
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device_remove_file(afu->chardev_m, &afu_master_attrs[i]);
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}
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