summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/infiniband/hw/usnic/usnic_uiom.h
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/drivers/infiniband/hw/usnic/usnic_uiom.h')
-rw-r--r--kernel/drivers/infiniband/hw/usnic/usnic_uiom.h80
1 files changed, 80 insertions, 0 deletions
diff --git a/kernel/drivers/infiniband/hw/usnic/usnic_uiom.h b/kernel/drivers/infiniband/hw/usnic/usnic_uiom.h
new file mode 100644
index 000000000..70440996e
--- /dev/null
+++ b/kernel/drivers/infiniband/hw/usnic/usnic_uiom.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ */
+
+#ifndef USNIC_UIOM_H_
+#define USNIC_UIOM_H_
+
+#include <linux/list.h>
+#include <linux/scatterlist.h>
+
+#include "usnic_uiom_interval_tree.h"
+
+#define USNIC_UIOM_READ (1)
+#define USNIC_UIOM_WRITE (2)
+
+#define USNIC_UIOM_MAX_PD_CNT (1000)
+#define USNIC_UIOM_MAX_MR_CNT (1000000)
+#define USNIC_UIOM_MAX_MR_SIZE (~0UL)
+#define USNIC_UIOM_PAGE_SIZE (PAGE_SIZE)
+
+struct usnic_uiom_dev {
+ struct device *dev;
+ struct list_head link;
+};
+
+struct usnic_uiom_pd {
+ struct iommu_domain *domain;
+ spinlock_t lock;
+ struct rb_root rb_root;
+ struct list_head devs;
+ int dev_cnt;
+};
+
+struct usnic_uiom_reg {
+ struct usnic_uiom_pd *pd;
+ unsigned long va;
+ size_t length;
+ int offset;
+ int page_size;
+ int writable;
+ struct list_head chunk_list;
+ struct work_struct work;
+ struct mm_struct *mm;
+ unsigned long diff;
+};
+
+struct usnic_uiom_chunk {
+ struct list_head list;
+ int nents;
+ struct scatterlist page_list[0];
+};
+
+struct usnic_uiom_pd *usnic_uiom_alloc_pd(void);
+void usnic_uiom_dealloc_pd(struct usnic_uiom_pd *pd);
+int usnic_uiom_attach_dev_to_pd(struct usnic_uiom_pd *pd, struct device *dev);
+void usnic_uiom_detach_dev_from_pd(struct usnic_uiom_pd *pd,
+ struct device *dev);
+struct device **usnic_uiom_get_dev_list(struct usnic_uiom_pd *pd);
+void usnic_uiom_free_dev_list(struct device **devs);
+struct usnic_uiom_reg *usnic_uiom_reg_get(struct usnic_uiom_pd *pd,
+ unsigned long addr, size_t size,
+ int access, int dmasync);
+void usnic_uiom_reg_release(struct usnic_uiom_reg *uiomr, int closing);
+int usnic_uiom_init(char *drv_name);
+void usnic_uiom_fini(void);
+#endif /* USNIC_UIOM_H_ */