From f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 01:04:47 +0000
Subject: [PATCH] add driver 5G
---
kernel/include/rdma/ib_umem.h | 105 ++++++++++++++++++++++++++--------------------------
1 files changed, 52 insertions(+), 53 deletions(-)
diff --git a/kernel/include/rdma/ib_umem.h b/kernel/include/rdma/ib_umem.h
index a1fd638..7059750 100644
--- a/kernel/include/rdma/ib_umem.h
+++ b/kernel/include/rdma/ib_umem.h
@@ -1,33 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/*
* Copyright (c) 2007 Cisco Systems. All rights reserved.
- *
- * This software is available to you under a choice of one of two
- * licenses. You may choose to be licensed under the terms of the GNU
- * General Public License (GPL) Version 2, available from the file
- * COPYING in the main directory of this source tree, or the
- * OpenIB.org BSD license below:
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above
- * copyright notice, this list of conditions and the following
- * disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials
- * provided with the distribution.
- *
- * 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 IB_UMEM_H
@@ -36,73 +9,99 @@
#include <linux/list.h>
#include <linux/scatterlist.h>
#include <linux/workqueue.h>
+#include <rdma/ib_verbs.h>
struct ib_ucontext;
struct ib_umem_odp;
struct ib_umem {
- struct ib_ucontext *context;
+ struct ib_device *ibdev;
+ struct mm_struct *owning_mm;
+ u64 iova;
size_t length;
unsigned long address;
- int page_shift;
- int writable;
- int hugetlb;
+ u32 writable : 1;
+ u32 is_odp : 1;
struct work_struct work;
- struct mm_struct *mm;
- unsigned long diff;
- struct ib_umem_odp *odp_data;
struct sg_table sg_head;
int nmap;
- int npages;
+ unsigned int sg_nents;
};
/* Returns the offset of the umem start relative to the first page. */
static inline int ib_umem_offset(struct ib_umem *umem)
{
- return umem->address & (BIT(umem->page_shift) - 1);
+ return umem->address & ~PAGE_MASK;
}
-/* Returns the first page of an ODP umem. */
-static inline unsigned long ib_umem_start(struct ib_umem *umem)
+static inline size_t ib_umem_num_dma_blocks(struct ib_umem *umem,
+ unsigned long pgsz)
{
- return umem->address - ib_umem_offset(umem);
-}
-
-/* Returns the address of the page after the last one of an ODP umem. */
-static inline unsigned long ib_umem_end(struct ib_umem *umem)
-{
- return ALIGN(umem->address + umem->length, BIT(umem->page_shift));
+ return (size_t)((ALIGN(umem->iova + umem->length, pgsz) -
+ ALIGN_DOWN(umem->iova, pgsz))) /
+ pgsz;
}
static inline size_t ib_umem_num_pages(struct ib_umem *umem)
{
- return (ib_umem_end(umem) - ib_umem_start(umem)) >> umem->page_shift;
+ return ib_umem_num_dma_blocks(umem, PAGE_SIZE);
}
+
+static inline void __rdma_umem_block_iter_start(struct ib_block_iter *biter,
+ struct ib_umem *umem,
+ unsigned long pgsz)
+{
+ __rdma_block_iter_start(biter, umem->sg_head.sgl, umem->nmap, pgsz);
+}
+
+/**
+ * rdma_umem_for_each_dma_block - iterate over contiguous DMA blocks of the umem
+ * @umem: umem to iterate over
+ * @pgsz: Page size to split the list into
+ *
+ * pgsz must be <= PAGE_SIZE or computed by ib_umem_find_best_pgsz(). The
+ * returned DMA blocks will be aligned to pgsz and span the range:
+ * ALIGN_DOWN(umem->address, pgsz) to ALIGN(umem->address + umem->length, pgsz)
+ *
+ * Performs exactly ib_umem_num_dma_blocks() iterations.
+ */
+#define rdma_umem_for_each_dma_block(umem, biter, pgsz) \
+ for (__rdma_umem_block_iter_start(biter, umem, pgsz); \
+ __rdma_block_iter_next(biter);)
#ifdef CONFIG_INFINIBAND_USER_MEM
-struct ib_umem *ib_umem_get(struct ib_ucontext *context, unsigned long addr,
- size_t size, int access, int dmasync);
+struct ib_umem *ib_umem_get(struct ib_device *device, unsigned long addr,
+ size_t size, int access);
void ib_umem_release(struct ib_umem *umem);
-int ib_umem_page_count(struct ib_umem *umem);
int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset,
size_t length);
+unsigned long ib_umem_find_best_pgsz(struct ib_umem *umem,
+ unsigned long pgsz_bitmap,
+ unsigned long virt);
#else /* CONFIG_INFINIBAND_USER_MEM */
#include <linux/err.h>
-static inline struct ib_umem *ib_umem_get(struct ib_ucontext *context,
+static inline struct ib_umem *ib_umem_get(struct ib_device *device,
unsigned long addr, size_t size,
- int access, int dmasync) {
+ int access)
+{
return ERR_PTR(-EINVAL);
}
static inline void ib_umem_release(struct ib_umem *umem) { }
-static inline int ib_umem_page_count(struct ib_umem *umem) { return 0; }
static inline int ib_umem_copy_from(void *dst, struct ib_umem *umem, size_t offset,
size_t length) {
return -EINVAL;
}
+static inline unsigned long ib_umem_find_best_pgsz(struct ib_umem *umem,
+ unsigned long pgsz_bitmap,
+ unsigned long virt)
+{
+ return 0;
+}
+
#endif /* CONFIG_INFINIBAND_USER_MEM */
#endif /* IB_UMEM_H */
--
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