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/linux-5.10/Documentation/x86/
Dpat.rst1 .. SPDX-License-Identifier: GPL-2.0
7 x86 Page Attribute Table (PAT) allows for setting the memory attribute at the
9 for setting of memory types over physical address ranges. However, PAT is
11 and also due to the fact that there are no hardware limitations on number of
13 not having memory type aliasing for the same physical memory with multiple
16 PAT allows for different types of memory attributes. The most commonly used
20 WB Write-back
22 WC Write-combined
23 WT Write-through
24 UC- Uncached Minus
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/linux-5.10/Documentation/ia64/
Daliasing.rst2 Memory Attribute Aliasing on IA-64
10 Memory Attributes
13 Itanium supports several attributes for virtual memory references.
19 WB Write-back (cacheable)
21 WC Write-coalescing
24 System memory typically uses the WB attribute. The UC attribute is
25 used for memory-mapped I/O devices. The WC attribute is uncacheable
34 support either WB or UC access to main memory, while others support
37 Memory Map
40 Platform firmware describes the physical memory map and the
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/linux-5.10/tools/testing/selftests/memory-hotplug/
Dmem-on-off-test.sh2 # SPDX-License-Identifier: GPL-2.0
6 # Kselftest framework requirement - SKIP code is 4.
18 SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'`
20 if [ ! -d "$SYSFS" ]; then
25 if ! ls $SYSFS/devices/system/memory/memory* > /dev/null 2>&1; then
26 echo $msg memory hotplug is not supported >&2
30 if ! grep -q 1 $SYSFS/devices/system/memory/memory*/removable; then
31 echo $msg no hot-pluggable memory >&2
37 # list all hot-pluggable memory
41 local state=${1:-.\*}
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/linux-5.10/sound/isa/wavefront/
Dwavefront_synth.c1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (C) by Paul Barton-Davis 1998-1999
5 * copyright (C) by Hannu Savolainen 1993-1996
14 * of GUS patches during loading, and full user-level access to all
15 * WaveFront commands. It tries to provide semi-intelligent patch and
36 loading. if non-zero, then during driver loading, the
80 checks on-board RAM.
87 MODULE_PARM_DESC(wf_raw, "if non-zero, assume that we need to boot the OS");
89 MODULE_PARM_DESC(fx_raw, "if non-zero, assume that the FX process needs help");
107 /* if WF_DEBUG not defined, no run-time debugging messages will
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/linux-5.10/arch/x86/mm/pat/
Dmemtype.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Page Attribute Table (PAT) support: handle memory caching attributes in page tables.
14 * memory ranges: uncached, write-combining, write-through, write-protected,
15 * and the most commonly used and default attribute: write-back caching.
18 * a hardware interface to enumerate a limited number of physical memory ranges
20 * Even modern CPUs have MTRRs enabled - but these are typically not touched
21 * by the kernel or by user-space (such as the X server), we rely on PAT for any
24 * PAT doesn't work via explicit memory ranges, but uses page table entries to add
25 * cache attribute information to the mapped memory range: there's 3 bits used,
70 * various user-requested or hardware-forced reasons:
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/linux-5.10/drivers/md/
Ddm-writecache.c1 // SPDX-License-Identifier: GPL-2.0
8 #include <linux/device-mapper.h>
13 #include <linux/dm-io.h>
14 #include <linux/dm-kcopyd.h>
30 #define MAX_AGE_UNSPECIFIED -1UL
101 #define WC_MODE_PMEM(wc) ((wc)->pmem_mode) argument
102 #define WC_MODE_FUA(wc) ((wc)->writeback_fua) argument
104 #define WC_MODE_PMEM(wc) false argument
105 #define WC_MODE_FUA(wc) false argument
107 #define WC_MODE_SORT_FREELIST(wc) (!WC_MODE_PMEM(wc)) argument
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/linux-5.10/drivers/infiniband/ulp/iser/
Discsi_iser.h7 * based on code maintained by open-iscsi@googlegroups.com
11 * Copyright (c) 2013-2014 Mellanox Technologies. All rights reserved.
23 * - Redistributions of source code must retain the above
27 * - Redistributions in binary form must reproduce the above
35 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
58 #include <linux/dma-mapping.h>
127 * supports -EAGAIN scheme where tx is suspended till the QP has room for more *
140 /* For Signature we don't support DATAOUTs so no need to make room for them */
147 - ISER_MAX_TX_MISC_PDUS \
148 - ISER_MAX_RX_MISC_PDUS) / \
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Diser_initiator.c3 * Copyright (c) 2013-2014 Mellanox Technologies. All rights reserved.
15 * - Redistributions of source code must retain the above
19 * - Redistributions in binary form must reproduce the above
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
43 /* Register user buffer memory and initialize passive rdma
45 * task->data[ISER_DIR_IN].data_len, Protection size
46 * os stored in task->prot[ISER_DIR_IN].data_len
51 struct iscsi_iser_task *iser_task = task->dd_data; in iser_prepare_read_cmd()
54 struct iser_ctrl *hdr = &iser_task->desc.iser_header; in iser_prepare_read_cmd()
55 struct iser_data_buf *buf_in = &iser_task->data[ISER_DIR_IN]; in iser_prepare_read_cmd()
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/linux-5.10/net/rds/
Dib_cm.c14 * - Redistributions of source code must retain the above
18 * - Redistributions in binary form must reproduce the above
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
52 conn->c_version = version; in rds_ib_set_protocol()
60 struct rds_ib_connection *ic = conn->c_transport_data; in rds_ib_set_flow_control()
64 ic->i_flowctl = 1; in rds_ib_set_flow_control()
67 ic->i_flowctl = 0; in rds_ib_set_flow_control()
73 * low timeout, but not the absolute minimum - this should
77 * smallest infinite number :-) above.
82 * Caller passes in a qp_attr pointer - don't waste stack spacv
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Dib_frmr.c14 * - Redistributions of source code must retain the above
18 * - Redistributions in binary form must reproduce the above
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
40 if (cmpxchg(&ibmr->u.frmr.fr_state, in rds_transition_frwr_state()
43 /* enforce order of ibmr->u.frmr.fr_state update in rds_transition_frwr_state()
47 atomic_dec(&ibmr->ic->i_fastreg_inuse_count); in rds_transition_frwr_state()
62 pool = rds_ibdev->mr_8k_pool; in rds_ib_alloc_frmr()
64 pool = rds_ibdev->mr_1m_pool; in rds_ib_alloc_frmr()
73 err = -ENOMEM; in rds_ib_alloc_frmr()
77 frmr = &ibmr->u.frmr; in rds_ib_alloc_frmr()
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/linux-5.10/include/linux/
Dio.h1 /* SPDX-License-Identifier: GPL-2.0-only */
83 * Posting") mandate non-posted configuration transactions. There is
84 * no ioremap API in the kernel that can guarantee non-posted write
87 * should override it if they have memory mapping implementations that
88 * guarantee non-posted writes semantics to make the memory mapping
113 * end up write-combining. This facility should be used in conjunction
114 * with pgprot_writecombine, ioremap-wc, or set_memory_wc, since it has
115 * no effect if the per-page mechanisms are functional.
119 * to have no effect.
136 return -1; in arch_phys_wc_index()
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/linux-5.10/net/sunrpc/xprtrdma/
Dverbs.c1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
3 * Copyright (c) 2014-2017 Oracle. All rights reserved.
4 * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
9 * COPYING in the main directory of this source tree, or the BSD-type
32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
49 * o buffer memory
58 #include <asm-generic/barrier.h>
101 struct rpcrdma_ep *ep = r_xprt->rx_ep; in rpcrdma_xprt_drain()
102 struct rdma_cm_id *id = ep->re_id; in rpcrdma_xprt_drain()
107 ib_drain_rq(id->qp); in rpcrdma_xprt_drain()
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/linux-5.10/drivers/gpu/drm/i915/
Di915_memcpy.c17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
51 :: "r" (src), "r" (dst) : "memory"); in __memcpy_ntdqa()
54 len -= 4; in __memcpy_ntdqa()
56 while (len--) { in __memcpy_ntdqa()
59 :: "r" (src), "r" (dst) : "memory"); in __memcpy_ntdqa()
80 :: "r" (src), "r" (dst) : "memory"); in __memcpy_ntdqu()
83 len -= 4; in __memcpy_ntdqu()
85 while (len--) { in __memcpy_ntdqu()
88 :: "r" (src), "r" (dst) : "memory"); in __memcpy_ntdqu()
97 * i915_memcpy_from_wc: perform an accelerated *aligned* read from WC
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/linux-5.10/drivers/infiniband/sw/rdmavt/
Dqp.c2 * Copyright(c) 2016 - 2020 Intel Corporation.
24 * - Redistributions of source code must retain the above copyright
26 * - Redistributions in binary form must reproduce the above copyright
30 * - Neither the name of Intel Corporation nor the names of its
37 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
108 * completions as per IB 1.2 C10-96.
139 * there are no security issues. The extra fault recovery machinery in cacheless_memcpy()
147 struct rvt_wss *wss = rdi->wss; in rvt_wss_exit()
153 kfree(wss->entries); in rvt_wss_exit()
154 wss->entries = NULL; in rvt_wss_exit()
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/linux-5.10/fs/ntfs/
Dunistr.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * unistr.c - NTFS Unicode string handling. Part of the Linux-NTFS project.
5 * Copyright (c) 2001-2006 Anton Altaparmakov
41 * ntfs_are_names_equal - compare two Unicode names for equality
66 * ntfs_collate_names - collate two Unicode names
76 * -1 if the first name collates before the second one,
106 return -1; in ntfs_collate_names()
111 return -1; in ntfs_collate_names()
122 * ntfs_ucsncmp - compare two little endian Unicode strings
129 * conversion is performed on non-little endian machines.
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/linux-5.10/fs/cifs/
Dsmbdirect.c1 // SPDX-License-Identifier: GPL-2.0-or-later
60 /* SMBD minimum receive size and fragmented sized defined in [MS-SMBD] */
72 /* No need to retry on Receiver Not Ready since SMBD manages credits */
77 * as defined in [MS-SMBD] 3.1.1.1
89 /* The maximum fragmented upper-layer payload receive size supported */
92 /* The maximum single-message size which can be received */
163 if (info->transport_status == SMBD_CONNECTED) { in smbd_disconnect_rdma_work()
164 info->transport_status = SMBD_DISCONNECTING; in smbd_disconnect_rdma_work()
165 rdma_disconnect(info->id); in smbd_disconnect_rdma_work()
171 queue_work(info->workqueue, &info->disconnect_work); in smbd_disconnect_rdma_connection()
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/linux-5.10/drivers/infiniband/hw/cxgb4/
Dcq.c2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
14 * - Redistributions of source code must retain the above
18 * - Redistributions in binary form must reproduce the above
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
49 res_wr->op_nres = cpu_to_be32( in destroy_cq()
53 res_wr->len16_pkd = cpu_to_be32(DIV_ROUND_UP(wr_len, 16)); in destroy_cq()
54 res_wr->cookie = (uintptr_t)wr_waitp; in destroy_cq()
55 res = res_wr->res; in destroy_cq()
56 res->u.cq.restype = FW_RI_RES_TYPE_CQ; in destroy_cq()
57 res->u.cq.op = FW_RI_RES_OP_RESET; in destroy_cq()
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/linux-5.10/drivers/nvme/host/
Drdma.c1 // SPDX-License-Identifier: GPL-2.0
4 * Copyright (c) 2015-2016 HGST, a Western Digital Company.
14 #include <linux/blk-mq.h>
15 #include <linux/blk-mq-rdma.h>
25 #include <linux/nvme-rdma.h>
143 * allows read and write access to all physical memory.
148 "Use memory registration even for contiguous memory regions");
152 static void nvme_rdma_recv_done(struct ib_cq *cq, struct ib_wc *wc);
160 return queue - queue->ctrl->queues; in nvme_rdma_queue_idx()
166 queue->ctrl->io_queues[HCTX_TYPE_DEFAULT] + in nvme_rdma_poll_queue()
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/linux-5.10/Documentation/devicetree/bindings/sram/
Dsram.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Generic on-chip SRAM
10 - Rob Herring <robh@kernel.org>
13 Simple IO memory regions to be managed by the genalloc API.
15 Each child of the sram node specifies a region of reserved memory. Each
17 reserved memory.
19 Following the generic-names recommended practice, node names should
30 - mmio-sram
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/linux-5.10/include/xen/interface/
Dxen.h18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
86 /* Architecture-specific hypercall definitions. */
100 * In the side comments, 'V.' denotes a per-VCPU VIRQ while 'G.' denotes a
101 * global VIRQ. The former can be bound once per VCPU and cannot be re-bound.
103 * allocated to VCPU0 but can subsequently be re-bound.
114 #define VIRQ_MEM_EVENT 10 /* G. (DOM0) A memory event has occured */
116 #define VIRQ_ENOMEM 12 /* G. (DOM0) Low on heap memory */
119 /* Architecture-specific VIRQ definitions. */
144 * x != 0 => PFD == x - 1
146 * Sub-commands: ptr[1:0] specifies the appropriate MMU_* command.
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/linux-5.10/drivers/infiniband/hw/qedr/
Dqedr_roce_cm.c2 * Copyright (c) 2015-2016 QLogic Corporation
14 * - Redistributions of source code must retain the above
18 * - Redistributions in binary form must reproduce the above
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
32 #include <linux/dma-mapping.h>
50 #include <rdma/qedr-abi.h>
55 info->gsi_cons = (info->gsi_cons + 1) % info->max_wr; in qedr_inc_sw_gsi_cons()
61 dev->gsi_qp_created = 1; in qedr_store_gsi_qp_cq()
62 dev->gsi_sqcq = get_qedr_cq(attrs->send_cq); in qedr_store_gsi_qp_cq()
63 dev->gsi_rqcq = get_qedr_cq(attrs->recv_cq); in qedr_store_gsi_qp_cq()
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/linux-5.10/fs/btrfs/
Dextent-tree.c1 // SPDX-License-Identifier: GPL-2.0
20 #include "tree-log.h"
21 #include "disk-io.h"
22 #include "print-tree.h"
26 #include "free-space-cache.h"
27 #include "free-space-tree.h"
30 #include "ref-verify.h"
31 #include "space-info.h"
32 #include "block-rsv.h"
33 #include "delalloc-space.h"
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/linux-5.10/arch/x86/kernel/cpu/mtrr/
Dmtrr.c1 /* Generic MTRR (Memory Type Range Register) driver.
3 Copyright (C) 1997-2000 Richard Gooch
29 on 6-7 March 2002.
31 System Programming Guide; Section 9.11. (1997 edition - PPro).
85 if (ops->vendor && ops->vendor < X86_VENDOR_NUM) in set_mtrr_ops()
86 mtrr_ops[ops->vendor] = ops; in set_mtrr_ops()
89 /* Returns non-zero if we have the write-combining memory type */
98 * write-combining. Don't allow it and leave room for other in have_wrcomb()
101 if (dev->vendor == PCI_VENDOR_ID_SERVERWORKS && in have_wrcomb()
102 dev->device == PCI_DEVICE_ID_SERVERWORKS_LE && in have_wrcomb()
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/linux-5.10/drivers/net/wireless/intersil/hostap/
Dhostap_plx.c1 // SPDX-License-Identifier: GPL-2.0-only
6 * - Host AP driver patch from james@madingley.org
7 * - linux-wlan-ng driver, Copyright (C) AbsoluteValue Systems, Inc.
31 MODULE_DESCRIPTION("Support for Intersil Prism2-based 802.11 wireless LAN "
33 MODULE_SUPPORTED_DEVICE("Intersil Prism2-based WLAN cards (PLX)");
68 PLXDEV(0x1562, 0x0001, "Symbol LA-4123"),
89 { 0x000b, 0x7110 } /* D-Link DWL-650 Rev. P1 */,
95 { 0x026f, 0x030b } /* Buffalo WLI-CF-S11G */,
98 { 0x028a, 0x0002 } /* D-Link DRC-650 */,
99 { 0x0250, 0x0002 } /* Samsung SWL2000-N */,
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/linux-5.10/drivers/nvme/target/
Drdma.c1 // SPDX-License-Identifier: GPL-2.0
4 * Copyright (c) 2015-2016 HGST, a Western Digital Company.
25 #include <linux/nvme-rdma.h>
164 static void nvmet_rdma_send_done(struct ib_cq *cq, struct ib_wc *wc);
165 static void nvmet_rdma_recv_done(struct ib_cq *cq, struct ib_wc *wc);
166 static void nvmet_rdma_read_data_done(struct ib_cq *cq, struct ib_wc *wc);
167 static void nvmet_rdma_write_data_done(struct ib_cq *cq, struct ib_wc *wc);
183 return -EINVAL; in srq_size_set()
190 return 1 + (((len - 1) & PAGE_MASK) >> PAGE_SHIFT); in num_pages()
195 return nvme_is_write(rsp->req.cmd) && in nvmet_rdma_need_data_in()
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