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/linux/drivers/gpu/drm/tests/
H A Ddrm_gem_shmem_test.c1 // SPDX-License-Identifier: GPL-2.0
10 #include <linux/dma-buf.h>
11 #include <linux/iosys-map.h>
45 struct drm_device *drm_dev = test->priv; in drm_gem_shmem_test_obj_create()
50 KUNIT_EXPECT_EQ(test, shmem->base.size, TEST_SIZE); in drm_gem_shmem_test_obj_create()
51 KUNIT_EXPECT_NOT_NULL(test, shmem->base.filp); in drm_gem_shmem_test_obj_create()
52 KUNIT_EXPECT_NOT_NULL(test, shmem->base.funcs); in drm_gem_shmem_test_obj_create()
58 * Test creating a shmem GEM object from a scatter/gather table exported
59 * via a DMA-BUF. The test case succeed if the GEM object is successfully
61 * attribute pointing to the scatter/gather table that has been imported.
[all …]
/linux/drivers/net/ethernet/huawei/hinic/
H A Dhinic_common.c1 // SPDX-License-Identifier: GPL-2.0-only
14 * hinic_cpu_to_be32 - convert data to big endian 32 bit format
32 * hinic_be32_to_cpu - convert data from big endian 32 bit format
50 * hinic_set_sge - set dma area in scatter gather entry
51 * @sge: scatter gather entry
57 sge->hi_addr = upper_32_bits(addr); in hinic_set_sge()
58 sge->lo_addr = lower_32_bits(addr); in hinic_set_sge()
59 sge->len = len; in hinic_set_sge()
63 * hinic_sge_to_dma - get dma address from scatter gather entry
64 * @sge: scatter gather entry
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/linux/drivers/gpu/drm/
H A Ddrm_gem_dma_helper.c1 // SPDX-License-Identifier: GPL-2.0-or-later
12 #include <linux/dma-buf.h>
13 #include <linux/dma-mapping.h>
31 * for devices that do not support scatter-gather DMA (either directly or
35 * the buffer objects are allocated using a traditional page-based
58 * __drm_gem_dma_create - Create a GEM DMA object without allocating memory
67 * A struct drm_gem_dma_object * on success or an ERR_PTR()-encoded negative
77 if (drm->driver->gem_create_object) { in __drm_gem_dma_create()
78 gem_obj = drm->driver->gem_create_object(drm, size); in __drm_gem_dma_create()
85 return ERR_PTR(-ENOMEM); in __drm_gem_dma_create()
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/linux/drivers/scsi/
H A Dst_options.h1 /* SPDX-License-Identifier: GPL-2.0 */
3 The compile-time configurable defaults for the Linux SCSI tape driver.
5 Copyright 1995-2003 Kai Makisara.
13 /* If TRY_DIRECT_IO is non-zero, the driver tries to transfer data directly
19 to the user program if ST_NOWAIT is non-zero. This helps if the SCSI
31 /* If ST_RECOVERED_WRITE_FATAL is non-zero, recovered errors while writing
40 Must be non-zero. */
43 /* Maximum number of scatter/gather segments */
46 /* The number of scatter/gather segments to allocate at first try (must be
50 /* The size of the first scatter/gather segments (determines the maximum block
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/linux/drivers/scsi/megaraid/
H A Dmegaraid_mbox.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
6 * Copyright (c) 2003-2004 LSI Logic Corporation.
94 #define MBOX_MAX_SG_SIZE 32 // maximum scatter-gather list size
102 #define MBOX_SYNC_DELAY_200 200 // 200 micro-seconds
112 * mbox_ccb_t - command control block specific to mailbox based controllers
117 * @sgl64 : 64-bit scatter-gather list
118 * @sgl32 : 32-bit scatter-gather list
119 * @sgl_dma_h : dma handle for the scatter-gather list
145 * mraid_device_t - adapter soft state structure for mailbox controllers
146 * @una_mbox64 : 64-bit mbox - unaligned
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H A Dmbox_defs.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
6 * Copyright (c) 2003-2004 LSI Logic Corporation.
137 * struct mbox_t - Driver and f/w handshake structure.
144 * @numsge : number of scatter gather elements in sg list
154 * structure must be allocated by the driver and aligned at 8-byte boundary.
176 * mbox64_t - 64-bit extension for the mailbox
177 * @segment_lo : the low 32-bits of the address of the scatter-gather list
178 * @segment_hi : the upper 32-bits of the address of the scatter-gather list
179 * @mbox : 32-bit mailbox, whose xferadder field must be set to
182 * This is the extension of the 32-bit mailbox to be able to perform DMA
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/linux/include/scsi/
H A Dsg.h1 /* SPDX-License-Identifier: GPL-2.0 */
16 * Copyright (C) 1998 - 2014 Douglas Gilbert
27 * Also see: <kernel_source>/Documentation/scsi/scsi-generic.rst
34 { /* call. It defines one scatter-gather element. */
46 unsigned short iovec_count; /* [i] 0 implies no scatter gather */
49 or scatter gather list */
52 unsigned int timeout; /* [i] MAX_UINT->no timeout (unit: millisec) */
53 unsigned int flags; /* [i] 0 -> default, see SG_FLAG... */
54 int pack_id; /* [i->o] unused internally (normally) */
55 void __user * usr_ptr; /* [i->o] unused internally */
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/linux/drivers/parisc/
H A Diommu-helpers.h1 /* SPDX-License-Identifier: GPL-2.0 */
5 * iommu_fill_pdir - Insert coalesced scatter/gather chunks into the I/O Pdir.
7 * @startsg: The scatter/gather list of coalesced chunks.
8 * @nents: The number of entries in the scatter/gather list.
11 * This function inserts the coalesced scatter/gather list chunks into the
28 dma_sg--; in iommu_fill_pdir()
30 while (nents-- > 0) { in iommu_fill_pdir()
36 sg_virt(startsg), startsg->length in iommu_fill_pdir()
57 sg_dma_address(dma_sg) = pide | ioc->ibase; in iommu_fill_pdir()
64 pdirp = &(ioc->pdir_base[pide >> IOVP_SHIFT]); in iommu_fill_pdir()
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/linux/include/linux/mtd/
H A Dubi.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
14 #include <mtd/ubi-user.h>
17 #define UBI_ALL -1
20 * Maximum number of scatter gather list entries,
26 * enum ubi_open_mode - UB
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/linux/Documentation/scsi/
H A Dst.rst1 .. SPDX-License-Identifier: GPL-2.0
23 flexible method and applicable to single-user workstations. However,
32 drive performs auto-detection of the tape format well (like some
33 QIC-drives). The result is that any tape can be read, writing can be
37 does not perform auto-detection well enough and there is a single
40 or not :-).
57 between formats in multi-tape operations (the explicitly overridden
72 limits). Both the auto-rewind (minor equals device number) and
73 non-rewind devices (minor is 128 + device number) are implemented.
128 dev_upper non-rew mode dev-lower
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/linux/drivers/net/ethernet/mellanox/mlx5/core/fpga/
H A Dsdk.h14 * - Redistributions of source code must retain the above
18 * - Redistributions in binary form must reproduce the above
38 #include <linux/dma-direction.h>
42 * This header defines the in-kernel API for Innova FPGA client drivers.
48 * enum mlx5_fpga_access_type - Enumerated the different methods possible for
51 * @MLX5_FPGA_ACCESS_TYPE_I2C: Use the slow CX-FPGA I2C bus
63 * struct mlx5_fpga_dma_entry - A scatter-gather DMA entry
70 /** @dma_addr: Private member. Physical DMA-mapped address of the data */
75 * struct mlx5_fpga_dma_buf - A packet buffer
76 * May contain up to 2 scatter-gather data entries
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/linux/drivers/scsi/fnic/
H A Dfcpio.h1 /* SPDX-License-Identifier: GPL-2.0-only */
127 tag->u.req_id = id; in fcpio_tag_id_enc()
133 *id = tag->u.req_id; in fcpio_tag_id_dec()
139 tag->u.ex_id.rx_id = rx_id; in fcpio_tag_exid_enc()
140 tag->u.ex_id.ox_id = ox_id; in fcpio_tag_exid_enc()
146 *rx_id = tag->u.ex_id.rx_id; in fcpio_tag_exid_dec()
147 *ox_id = tag->u.ex_id.ox_id; in fcpio_tag_exid_dec()
166 hdr->type = type; in fcpio_header_enc()
167 hdr->status = status; in fcpio_header_enc()
168 hdr->_resvd = 0; in fcpio_header_enc()
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/linux/drivers/hid/intel-thc-hid/intel-thc/
H A Dintel-thc-dma.h1 /* SPDX-License-Identifier: GPL-2.0 */
8 #include <linux/dma-mapping.h>
24 * so don't need to send the lower 10-bits of address.
69 * given by scatter-gather list allocation).
88 * struct thc_dma_configuration - THC DMA configure
93 * @sgls: Array of pointers to scatter-gather lists
94 * @sgls_nent: Actual number of entries per scatter-gather list
121 * struct thc_dma_context - THC DMA context
/linux/drivers/misc/bcm-vk/
H A Dbcm_vk_sg.h1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright 2018-2020 Broadcom.
9 #include <linux/dma-mapping.h>
23 * [U32] addr_l[0] = lower 32-bits of address0
24 * [U32] addr_h[0] = higher 32-bits of address0
26 * [U32] size[N-1] = size of data in addressN-1
27 * [U32] addr_l[N-1] = lower 32-bits of addressN-1
28 * [U32] addr_h[N-1] = higher 32-bits of addressN-1
45 * Scatter-gather DMA buffer API.
48 * scatter-gather list from userspace address and map the memory
/linux/net/9p/
H A Dtrans_virtio.c1 // SPDX-License-Identifier: GPL-2.0-only
46 * struct virtio_chan - per-instance transport information
55 * @sg: scatter gather list which is used to pack a request (protected?)
58 * We keep all per-channel information in a structure.
59 * This structure is allocated within the devices dev->me
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/linux/include/xen/interface/io/
H A Dvscsiif.h1 /* SPDX-License-Identifier: MIT */
34 *------------------ Backend Device Identification (PRIVATE) ------------------
36 * p-devname
41 * p-dev
44 * A string specifying the backend device: either a 4-tuple "h:c:t:l"
48 * v-dev
51 * A string specifying the frontend device in form of a 4-tuple "h:c:t:l"
54 *--------------------------------- Features ---------------------------------
56 * feature-sg-grant
60 * Specifies the maximum number of scatter/gather elements in grant pages
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/linux/drivers/net/ethernet/cavium/liquidio/
H A Dliquidio_common.h7 * Copyright (c) 2003-2016 Cavium, Inc.
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
19 * \brief Common: Structures and macros used in PCI-NIC package by core and
50 /* pre-defined host->NIC tag values */
60 /* Subcodes are used by host driver/apps to identify the sub-operation
85 #define VF_DRV_REMOVED -1
101 #define CVM_DRV_APP_END (CVM_DRV_INVALID_APP - 1)
123 index = index + count - max; in incr_index()
149 /*--------------------------- SCATTER GATHER ENTRY -----------------------*/
151 /* The Scatter-Gather List Entry. The scatter or gather component used with
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/linux/drivers/misc/genwqe/
H A Dcard_ddcb.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
11 * Author: Joerg-Stephan Vogt <jsvogt@de.ibm.com>
23 * struct ddcb - Device Driver Control Block DDCB
120 * Accessing HSI/SHI is done 32-bit wide
121 * Normally 16-bit access would work too, but on some platforms the
123 * switching to 32-bit such that those platforms will work too.
139 * Genwqe Scatter Gather list
151 * 0b0010 First entry of a descriptor list. Start from a Buffer-Empty
163 * struct sglist - Scatter gather list
169 * Depending on the command the GenWQE card can use a scatter gather
/linux/drivers/firmware/efi/
H A Dcapsule.c1 // SPDX-License-Identifier: GPL-2.0
25 static int efi_reset_type = -1;
34 * efi_capsule_pending - has a capsule been passed to the firmware?
47 * A non-racy use is from platform reboot code because we use
74 * efi_capsule_supported - does the firmware support the capsule?
94 return -EINVAL; in efi_capsule_supported()
105 return -ENOSPC; in efi_capsule_supported()
112 * Every scatter gather list (block descriptor) page must end with a
116 #define SGLIST_PER_PAGE ((PAGE_SIZE / sizeof(efi_capsule_block_desc_t)) - 1)
119 * How many scatter gather list (block descriptor) pages do we need
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/linux/drivers/gpu/drm/xe/
H A Dxe_hmm.c1 // SPDX-License-Identifier: MIT
8 #include <linux/dma-mapping.h>
19 return (end - start) >> PAGE_SHIFT; in xe_npages_in_range()
34 if (mmu_interval_read_retry(range->notifier, range->notifier_seq)) { in xe_alloc_sg()
36 return -EAGAIN; in xe_alloc_sg()
39 npages = xe_npages_in_range(range->start, range->end); in xe_alloc_sg()
43 hmm_pfn = range->hmm_pfns[i]; in xe_alloc_sg()
48 /* If order > 0 the page may extend beyond range->start */ in xe_alloc_sg()
49 len -= (hmm_pfn & ~HMM_PFN_FLAGS) & (len - 1); in xe_alloc_sg()
59 * xe_build_sg() - build a scatter gather table for all the physical pages/pfn
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/linux/drivers/message/fusion/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
65 int "Maximum number of scatter gather entries (16 - 128)"
69 This option allows you to specify the maximum number of scatter-
70 gather entries per I/O. The driver default is 128, which matches
/linux/Documentation/driver-api/dmaengine/
H A Dprovider.rst20 DMA-eligible devices to the controller itself. Whenever the device
44 transfer into smaller sub-transfers.
49 non-contiguous buffers to a contiguous buffer, which is called
50 scatter-gather.
53 scatter-gather. So we're left with two cases here: either we have a
56 that implements in hardware scatter-gather.
79 These were just the general memory-to-memory (also called mem2mem) or
80 memory-to-device (mem2dev) kind of transfers. Most devices often
98 documentation file in Documentation/crypto/async-tx-api.rst.
104 ------------------------------------
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/linux/tools/perf/pmu-events/arch/arm64/fujitsu/a64fx/
H A Dpipeline.json123 …"PublicDescription": "This event counts aborted requests in L1D pipelines that due to store-load i…
126 …"BriefDescription": "This event counts aborted requests in L1D pipelines that due to store-load in…
141 …"PublicDescription": "This event counts the number of times where 2 elements of the gather instruc…
144 …"BriefDescription": "This event counts the number of times where 2 elements of the gather instruct…
147 …"PublicDescription": "This event counts the number of times where 2 elements of the gather instruc…
150 …"BriefDescription": "This event counts the number of times where 2 elements of the gather instruct…
153 …"PublicDescription": "This event counts the number of times where 2 elements of the gather instruc…
156 …"BriefDescription": "This event counts the number of times where 2 elements of the gather instruct…
159 "PublicDescription": "This event counts the number of flows of the scatter instructions.",
162 "BriefDescription": "This event counts the number of flows of the scatter instructions."
/linux/drivers/scsi/mpt3sas/
H A DKconfig5 # Copyright (C) 2012-2014 LSI Corporation
6 # (mailto:DL-MPTFusionLinux@lsi.com)
21 # LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
40 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
50 This driver supports PCI-Express SAS 12Gb/s Host Adapters.
53 int "LSI MPT Fusion SAS 2.0 Max number of SG Entries (16 - 256)"
58 This option allows you to specify the maximum number of scatter-
59 gather entries per I/O. The driver default is 128, which matches
65 int "LSI MPT Fusion SAS 3.0 Max number of SG Entries (16 - 256)"
70 This option allows you to specify the maximum number of scatter-
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/linux/drivers/gpu/drm/i915/
H A Di915_scatterlist.h2 * SPDX-License-Identifier: MIT
12 #include <linux/dma-mapping.h>
37 s.max = s.curr = s.sgp->offset; in __sgt_iter()
43 s.max += s.sgp->length; in __sgt_iter()
52 return sg->length >> PAGE_SHIFT; in __sg_page_count()
69 * __sg_next - return the next scatterlist entry in a list
83 * __for_each_sgt_daddr - iterate over the device addresses of the given sg_table
90 for ((__iter) = __sgt_iter((__sgt)->sgl, true); \
95 * __for_each_daddr_next - iterates over the device addresses with pre-initialized iterator.
106 * for_each_sgt_page - iterate over the pages of the given sg_table
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