These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / dma / ioat / sysfs.c

diff --git a/kernel/drivers/dma/ioat/sysfs.c b/kernel/drivers/dma/ioat/sysfs.c
new file mode 100644 (file)
index 0000000..cb4a857
--- /dev/null
+++ b/kernel/drivers/dma/ioat/sysfs.c
@@ -0,0 +1,135 @@
+/*
+ * Intel I/OAT DMA Linux driver
+ * Copyright(c) 2004 - 2015 Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/dmaengine.h>
+#include <linux/pci.h>
+#include "dma.h"
+#include "registers.h"
+#include "hw.h"
+
+#include "../dmaengine.h"
+
+static ssize_t cap_show(struct dma_chan *c, char *page)
+{
+       struct dma_device *dma = c->device;
+
+       return sprintf(page, "copy%s%s%s%s%s\n",
+                      dma_has_cap(DMA_PQ, dma->cap_mask) ? " pq" : "",
+                      dma_has_cap(DMA_PQ_VAL, dma->cap_mask) ? " pq_val" : "",
+                      dma_has_cap(DMA_XOR, dma->cap_mask) ? " xor" : "",
+                      dma_has_cap(DMA_XOR_VAL, dma->cap_mask) ? " xor_val" : "",
+                      dma_has_cap(DMA_INTERRUPT, dma->cap_mask) ? " intr" : "");
+
+}
+struct ioat_sysfs_entry ioat_cap_attr = __ATTR_RO(cap);
+
+static ssize_t version_show(struct dma_chan *c, char *page)
+{
+       struct dma_device *dma = c->device;
+       struct ioatdma_device *ioat_dma = to_ioatdma_device(dma);
+
+       return sprintf(page, "%d.%d\n",
+                      ioat_dma->version >> 4, ioat_dma->version & 0xf);
+}
+struct ioat_sysfs_entry ioat_version_attr = __ATTR_RO(version);
+
+static ssize_t
+ioat_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
+{
+       struct ioat_sysfs_entry *entry;
+       struct ioatdma_chan *ioat_chan;
+
+       entry = container_of(attr, struct ioat_sysfs_entry, attr);
+       ioat_chan = container_of(kobj, struct ioatdma_chan, kobj);
+
+       if (!entry->show)
+               return -EIO;
+       return entry->show(&ioat_chan->dma_chan, page);
+}
+
+const struct sysfs_ops ioat_sysfs_ops = {
+       .show   = ioat_attr_show,
+};
+
+void ioat_kobject_add(struct ioatdma_device *ioat_dma, struct kobj_type *type)
+{
+       struct dma_device *dma = &ioat_dma->dma_dev;
+       struct dma_chan *c;
+
+       list_for_each_entry(c, &dma->channels, device_node) {
+               struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
+               struct kobject *parent = &c->dev->device.kobj;
+               int err;
+
+               err = kobject_init_and_add(&ioat_chan->kobj, type,
+                                          parent, "quickdata");
+               if (err) {
+                       dev_warn(to_dev(ioat_chan),
+                                "sysfs init error (%d), continuing...\n", err);
+                       kobject_put(&ioat_chan->kobj);
+                       set_bit(IOAT_KOBJ_INIT_FAIL, &ioat_chan->state);
+               }
+       }
+}
+
+void ioat_kobject_del(struct ioatdma_device *ioat_dma)
+{
+       struct dma_device *dma = &ioat_dma->dma_dev;
+       struct dma_chan *c;
+
+       list_for_each_entry(c, &dma->channels, device_node) {
+               struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
+
+               if (!test_bit(IOAT_KOBJ_INIT_FAIL, &ioat_chan->state)) {
+                       kobject_del(&ioat_chan->kobj);
+                       kobject_put(&ioat_chan->kobj);
+               }
+       }
+}
+
+static ssize_t ring_size_show(struct dma_chan *c, char *page)
+{
+       struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
+
+       return sprintf(page, "%d\n", (1 << ioat_chan->alloc_order) & ~1);
+}
+static struct ioat_sysfs_entry ring_size_attr = __ATTR_RO(ring_size);
+
+static ssize_t ring_active_show(struct dma_chan *c, char *page)
+{
+       struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
+
+       /* ...taken outside the lock, no need to be precise */
+       return sprintf(page, "%d\n", ioat_ring_active(ioat_chan));
+}
+static struct ioat_sysfs_entry ring_active_attr = __ATTR_RO(ring_active);
+
+static struct attribute *ioat_attrs[] = {
+       &ring_size_attr.attr,
+       &ring_active_attr.attr,
+       &ioat_cap_attr.attr,
+       &ioat_version_attr.attr,
+       NULL,
+};
+
+struct kobj_type ioat_ktype = {
+       .sysfs_ops = &ioat_sysfs_ops,
+       .default_attrs = ioat_attrs,
+};