| /kernel/linux/linux-5.10/kernel/dma/ |
| D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
9 default y
88 # Should be selected if we can mmap non-coherent mappings to userspace.
93 default y if !MMU
112 depends on HAVE_DMA_CONTIGUOUS && CMA
115 to allocate big physically-contiguous blocks of memory for use with
116 hardware components that do not support I/O map nor scatter-gather.
118 You can disable CMA by specifying "cma=0" on the kernel's command
128 default NUMA && ARM64
130 Enable this option to get pernuma CMA areas so that devices like
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| D | contiguous.c | 1 // SPDX-License-Identifier: GPL-2.0+
4 * Copyright (c) 2010-2011 by Samsung Electronics.
11 * The Contiguous Memory Allocator (CMA) makes it possible to
17 * Various devices on embedded systems have no scatter-getter and/or
32 * CMA tries to solve this issue by operating on memory regions
38 #define pr_fmt(fmt) "cma: " fmt
51 #include <linux/dma-map-ops.h>
52 #include <linux/cma.h>
60 struct cma *dma_contiguous_default_area;
63 * Default global CMA area size can be defined in kernel's .config.
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| D | pool.c | 1 // SPDX-License-Identifier: GPL-2.0
6 #include <linux/cma.h>
8 #include <linux/dma-map-ops.h>
9 #include <linux/dma-direct.h>
63 struct cma *cma; in cma_in_zone() local
65 cma = dev_get_cma_area(NULL); in cma_in_zone()
66 if (!cma) in cma_in_zone()
69 size = cma_get_size(cma); in cma_in_zone()
73 /* CMA can't cross zone boundaries, see cma_activate_area() */ in cma_in_zone()
74 end = cma_get_base(cma) + size - 1; in cma_in_zone()
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| /kernel/linux/linux-6.6/kernel/dma/ |
| D | contiguous.c | 1 // SPDX-License-Identifier: GPL-2.0+
4 * Copyright (c) 2010-2011 by Samsung Electronics.
11 * The Contiguous Memory Allocator (CMA) makes it possible to
17 * Various devices on embedded systems have no scatter-getter and/or
32 * CMA tries to solve this issue by operating on memory regions
38 #define pr_fmt(fmt) "cma: " fmt
51 #include <linux/dma-map-ops.h>
52 #include <linux/cma.h>
61 struct cma *dma_contiguous_default_area;
64 * Default global CMA area size can be defined in kernel's .config.
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| D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
9 default y
84 # by default.
95 default n
100 pools as needed. To reduce run-time kernel memory requirements, you
119 <Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt>
124 # Should be selected if we can mmap non-coherent mappings to userspace.
129 default y if !MMU
147 depends on HAVE_DMA_CONTIGUOUS && CMA
150 to allocate big physically-contiguous blocks of memory for use with
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| D | pool.c | 1 // SPDX-License-Identifier: GPL-2.0
6 #include <linux/cma.h>
8 #include <linux/dma-map-ops.h>
9 #include <linux/dma-direct.h>
60 struct cma *cma; in cma_in_zone() local
62 cma = dev_get_cma_area(NULL); in cma_in_zone()
63 if (!cma) in cma_in_zone()
66 size = cma_get_size(cma); in cma_in_zone()
70 /* CMA can't cross zone boundaries, see cma_activate_area() */ in cma_in_zone()
71 end = cma_get_base(cma) + size - 1; in cma_in_zone()
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| /kernel/linux/linux-5.10/mm/ |
| D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
12 default DISCONTIGMEM_MANUAL if ARCH_DISCONTIGMEM_DEFAULT
13 default SPARSEMEM_MANUAL if ARCH_SPARSEMEM_DEFAULT
14 default FLATMEM_MANUAL
25 This option is best suited for non-NUMA systems with
56 memory hot-plug systems. This is normal.
60 hot-plug and hot-remove.
69 default n
78 default n
80 File-LRU is a mechanism that put file page in global lru list,
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| /kernel/linux/linux-5.10/include/drm/ |
| D | drm_gem_cma_helper.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
12 * struct drm_gem_cma_object - GEM object backed by CMA memory allocations
25 /* For objects with DMA memory allocated by GEM CMA */
40 * DEFINE_DRM_GEM_CMA_FOPS() - macro to generate file operations for CMA drivers
43 * This macro autogenerates a suitable &struct file_operations for CMA based
48 * Note that the declaration is already marked as static - if you need a
49 * non-static version of this you're probably doing it wrong and will break the
113 * DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE - CMA GEM driver operations
116 * This macro provides a shortcut for setting the default GEM operations in the
120 * override the default implementation of &struct rm_driver.dumb_create. Use
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| /kernel/linux/linux-6.6/mm/ |
| D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
18 default y
33 compress them into a dynamically allocated RAM-based memory pool.
39 bool "CMA reuse feature"
40 depends on CMA
43 allocations with __GFP_CMA flag will use cma areas prior to
46 It improves the utilization ratio of cma areas.
49 bool "Enable the compressed cache for swap pages by default"
72 swapped out again, it will be re-compressed.
75 prompt "Default compressor"
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| /kernel/linux/linux-5.10/drivers/gpu/drm/ |
| D | drm_gem_cma_helper.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * drm gem CMA (contiguous memory allocator) helper functions
12 #include <linux/dma-buf.h>
13 #include <linux/dma-mapping.h>
26 * DOC: cma helpers
31 * The DRM GEM/CMA helpers use this allocator as a means to provide buffer
37 * __drm_gem_cma_create - Create a GEM CMA object without allocating memory
41 * This function creates and initializes a GEM CMA object of the given size,
45 * A struct drm_gem_cma_object * on success or an ERR_PTR()-encoded negative
55 if (drm->driver->gem_create_object) in __drm_gem_cma_create()
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| /kernel/linux/linux-6.6/Documentation/devicetree/bindings/reserved-memory/ |
| D | shared-dma-pool.yaml | 1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/reserved-memory/shared-dma-pool.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: /reserved-memory DMA pool
10 - devicetree-spec@vger.kernel.org
13 - $ref: reserved-memory.yaml
18 - const: shared-dma-pool
25 - const: restricted-dma-pool
30 When using this, the no-map and reusable properties must not
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/reserved-memory/ |
| D | reserved-memory.txt | 3 Reserved memory is specified as a node under the /reserved-memory node.
12 /reserved-memory node
13 ---------------------
14 #address-cells, #size-cells (required) - standard definition
15 - Should use the same values as the root node
16 ranges (required) - standard definition
17 - Should be empty
19 /reserved-memory/ child nodes
20 -----------------------------
21 Each child of the reserved-memory node specifies one or more regions of
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| /kernel/linux/linux-6.6/arch/xtensa/boot/dts/ |
| D | kc705.dts | 1 // SPDX-License-Identifier: GPL-2.0
2 /dts-v1/;
4 /include/ "xtfpga-flash-128m.dtsi"
7 compatible = "cdns,xtensa-kc705";
16 reserved-memory {
17 #address-cells = <1>;
18 #size-cells = <1>;
22 linux,cma {
23 compatible = "shared-dma-pool";
27 alloc-ranges = <0x00000000 0x20000000>;
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| /kernel/linux/linux-5.10/arch/xtensa/boot/dts/ |
| D | kc705.dts | 1 // SPDX-License-Identifier: GPL-2.0
2 /dts-v1/;
4 /include/ "xtfpga-flash-128m.dtsi"
7 compatible = "cdns,xtensa-kc705";
16 reserved-memory {
17 #address-cells = <1>;
18 #size-cells = <1>;
22 linux,cma {
23 compatible = "shared-dma-pool";
27 alloc-ranges = <0x00000000 0x20000000>;
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/media/ |
| D | allwinner,sun4i-a10-video-engine.yaml | 1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/media/allwinner,sun4i-a10-video-engine.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Chen-Yu Tsai <wens@csie.org>
11 - Maxime Ripard <mripard@kernel.org>
16 - allwinner,sun4i-a10-video-engine
17 - allwinner,sun5i-a13-video-engine
18 - allwinner,sun7i-a20-video-engine
19 - allwinner,sun8i-a33-video-engine
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| /kernel/linux/linux-5.10/include/linux/ |
| D | dma-map-ops.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
9 #include <linux/dma-mapping.h>
12 struct cma;
75 #include <asm/dma-mapping.h>
79 if (dev->dma_ops) in get_dma_ops()
80 return dev->dma_ops; in get_dma_ops()
81 return get_arch_dma_ops(dev->bus); in get_dma_ops()
87 dev->dma_ops = dma_ops; in set_dma_ops()
101 extern struct cma *dma_contiguous_default_area;
103 static inline struct cma *dev_get_cma_area(struct device *dev) in dev_get_cma_area()
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| /kernel/linux/linux-6.6/Documentation/devicetree/bindings/media/ |
| D | allwinner,sun4i-a10-video-engine.yaml | 1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/media/allwinner,sun4i-a10-video-engine.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Chen-Yu Tsai <wens@csie.org>
11 - Maxime Ripard <mripard@kernel.org>
16 - allwinner,sun4i-a10-video-engine
17 - allwinner,sun5i-a13-video-engine
18 - allwinner,sun7i-a20-video-engine
19 - allwinner,sun8i-a33-video-engine
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| /kernel/linux/linux-6.6/Documentation/powerpc/ |
| D | firmware-assisted-dump.rst | 2 Firmware-Assisted Dump
7 The goal of firmware-assisted dump is to enable the dump of
8 a crashed system, and to do so from a fully-reset system, and
12 - Firmware-Assisted Dump (FADump) infrastructure is intended to replace
14 - Fadump uses the same firmware interfaces and memory reservation model
16 - Unlike phyp dump, FADump exports the memory dump through /proc/vmcore
19 - Unlike phyp dump, userspace tool does not need to refer any sysfs
21 - Unlike phyp dump, FADump allows user to release all the memory reserved
23 - Once enabled through kernel boot parameter, FADump can be
28 Comparing with kdump or other strategies, firmware-assisted
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| /kernel/linux/linux-5.10/Documentation/powerpc/ |
| D | firmware-assisted-dump.rst | 2 Firmware-Assisted Dump
7 The goal of firmware-assisted dump is to enable the dump of
8 a crashed system, and to do so from a fully-reset system, and
12 - Firmware-Assisted Dump (FADump) infrastructure is intended to replace
14 - Fadump uses the same firmware interfaces and memory reservation model
16 - Unlike phyp dump, FADump exports the memory dump through /proc/vmcore
19 - Unlike phyp dump, userspace tool does not need to refer any sysfs
21 - Unlike phyp dump, FADump allows user to release all the memory reserved
23 - Once enabled through kernel boot parameter, FADump can be
28 Comparing with kdump or other strategies, firmware-assisted
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| /kernel/linux/linux-6.6/arch/arm64/boot/dts/freescale/ |
| D | imx93-11x11-evk.dts | 1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
6 /dts-v1/;
12 compatible = "fsl,imx93-11x11-evk", "fsl,imx93";
15 stdout-path = &lpuart1;
18 reserved-memory {
19 #address-cells = <2>;
20 #size-cells = <2>;
23 linux,cma {
24 compatible = "shared-dma-pool";
26 alloc-ranges = <0 0x80000000 0 0x40000000>;
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| D | imx93-tqma9352.dtsi | 1 // SPDX-License-Identifier: (GPL-2.0-or-later OR MIT)
3 * Copyright (c) 2022 TQ-Systems GmbH <linux@ew.tq-group.com>,
4 * D-82229 Seefeld, Germany.
11 model = "TQ-Systems i.MX93 TQMa93xxLA/TQMa93xxCA SOM";
12 compatible = "tq,imx93-tqma9352", "fsl,imx93";
14 reserved-memory {
15 #address-cells = <2>;
16 #size-cells = <2>;
19 linux,cma {
20 compatible = "shared-dma-pool";
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| D | imx8ulp-evk.dts | 1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
6 /dts-v1/;
12 compatible = "fsl,imx8ulp-evk", "fsl,imx8ulp";
15 stdout-path = &lpuart5;
23 reserved-memory {
24 #address-cells = <2>;
25 #size-cells = <2>;
28 linux,cma {
29 compatible = "shared-dma-pool";
32 linux,cma-default;
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| /kernel/linux/linux-5.10/arch/arm/boot/dts/ |
| D | imx6ul-ccimx6ulsom.dtsi | 1 // SPDX-License-Identifier: GPL-2.0
3 * Digi International's ConnectCore 6UL System-On-Module device tree source
12 reg = <0x80000000 0>; /* will be filled by U-Boot */
15 reserved-memory {
16 #address-cells = <1>;
17 #size-cells = <1>;
20 linux,cma {
21 compatible = "shared-dma-pool";
24 linux,cma-default;
30 vref-supply = <&vdda_adc_3v3>;
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| /kernel/linux/linux-6.6/arch/arm/boot/dts/nxp/imx/ |
| D | imx6ul-ccimx6ulsom.dtsi | 1 // SPDX-License-Identifier: GPL-2.0
3 * Digi International's ConnectCore 6UL System-On-Module device tree source
12 reg = <0x80000000 0>; /* will be filled by U-Boot */
15 reserved-memory {
16 #address-cells = <1>;
17 #size-cells = <1>;
20 linux,cma {
21 compatible = "shared-dma-pool";
24 linux,cma-default;
30 vref-supply = <&vdda_adc_3v3>;
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| /kernel/linux/linux-5.10/drivers/gpu/drm/etnaviv/ |
| D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
12 select CMA if HAVE_DMA_CONTIGUOUS
21 default y
|