IB/core: Create get_perf_mad function in sysfs.c
Create a new function to retrieve performance management data from the existing code in get_pma_counter(). Reviewed-by: Hal Rosenstock <hal@mellanox.com> Signed-off-by: Christoph Lameter <cl@linux.com> Reviewed-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
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@ -398,21 +398,21 @@ struct port_table_attribute port_pma_attr_##_name = { \
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.index = (_offset) | ((_width) << 16) | ((_counter) << 24) \
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}
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static ssize_t show_pma_counter(struct ib_port *p, struct port_attribute *attr,
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char *buf)
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/*
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* Get a Perfmgmt MAD block of data.
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* Returns error code or the number of bytes retrieved.
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*/
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static int get_perf_mad(struct ib_device *dev, int port_num, int attr,
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void *data, int offset, size_t size)
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{
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struct port_table_attribute *tab_attr =
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container_of(attr, struct port_table_attribute, attr);
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int offset = tab_attr->index & 0xffff;
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int width = (tab_attr->index >> 16) & 0xff;
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struct ib_mad *in_mad = NULL;
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struct ib_mad *out_mad = NULL;
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struct ib_mad *in_mad;
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struct ib_mad *out_mad;
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size_t mad_size = sizeof(*out_mad);
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u16 out_mad_pkey_index = 0;
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ssize_t ret;
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if (!p->ibdev->process_mad)
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return sprintf(buf, "N/A (no PMA)\n");
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if (!dev->process_mad)
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return -ENOSYS;
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in_mad = kzalloc(sizeof *in_mad, GFP_KERNEL);
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out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
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@ -425,12 +425,12 @@ static ssize_t show_pma_counter(struct ib_port *p, struct port_attribute *attr,
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in_mad->mad_hdr.mgmt_class = IB_MGMT_CLASS_PERF_MGMT;
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in_mad->mad_hdr.class_version = 1;
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in_mad->mad_hdr.method = IB_MGMT_METHOD_GET;
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in_mad->mad_hdr.attr_id = cpu_to_be16(0x12); /* PortCounters */
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in_mad->mad_hdr.attr_id = attr;
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in_mad->data[41] = p->port_num; /* PortSelect field */
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in_mad->data[41] = port_num; /* PortSelect field */
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if ((p->ibdev->process_mad(p->ibdev, IB_MAD_IGNORE_MKEY,
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p->port_num, NULL, NULL,
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if ((dev->process_mad(dev, IB_MAD_IGNORE_MKEY,
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port_num, NULL, NULL,
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(const struct ib_mad_hdr *)in_mad, mad_size,
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(struct ib_mad_hdr *)out_mad, &mad_size,
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&out_mad_pkey_index) &
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@ -439,31 +439,49 @@ static ssize_t show_pma_counter(struct ib_port *p, struct port_attribute *attr,
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ret = -EINVAL;
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goto out;
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}
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memcpy(data, out_mad->data + offset, size);
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ret = size;
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out:
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kfree(in_mad);
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kfree(out_mad);
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return ret;
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}
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static ssize_t show_pma_counter(struct ib_port *p, struct port_attribute *attr,
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char *buf)
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{
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struct port_table_attribute *tab_attr =
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container_of(attr, struct port_table_attribute, attr);
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int offset = tab_attr->index & 0xffff;
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int width = (tab_attr->index >> 16) & 0xff;
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ssize_t ret;
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u8 data[8];
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ret = get_perf_mad(p->ibdev, p->port_num, cpu_to_be16(0x12), &data,
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40 + offset / 8, sizeof(data));
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if (ret < 0)
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return sprintf(buf, "N/A (no PMA)\n");
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switch (width) {
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case 4:
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ret = sprintf(buf, "%u\n", (out_mad->data[40 + offset / 8] >>
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ret = sprintf(buf, "%u\n", (*data >>
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(4 - (offset % 8))) & 0xf);
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break;
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case 8:
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ret = sprintf(buf, "%u\n", out_mad->data[40 + offset / 8]);
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ret = sprintf(buf, "%u\n", *data);
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break;
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case 16:
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ret = sprintf(buf, "%u\n",
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be16_to_cpup((__be16 *)(out_mad->data + 40 + offset / 8)));
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be16_to_cpup((__be16 *)data));
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break;
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case 32:
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ret = sprintf(buf, "%u\n",
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be32_to_cpup((__be32 *)(out_mad->data + 40 + offset / 8)));
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be32_to_cpup((__be32 *)data));
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break;
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default:
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ret = 0;
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}
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out:
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kfree(in_mad);
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kfree(out_mad);
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return ret;
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}
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