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✏️ /usr/src/linux-headers-6.8.0-124/include/linux/mlx5/doorbell.h

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/*
 * Copyright (c) 2013-2015, Mellanox Technologies. 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 MLX5_DOORBELL_H
#define MLX5_DOORBELL_H

#define MLX5_BF_OFFSET	      0x800
#define MLX5_CQ_DOORBELL      0x20

/* Assume that we can just write a 64-bit doorbell atomically.  s390
 * actually doesn't have writeq() but S/390 systems don't even have
 * PCI so we won't worry about it.
 *
 * Note that the write is not atomic on 32-bit systems! In contrast to 64-bit
 * ones, it requires proper locking. mlx5_write64 doesn't do any locking, so use
 * it at your own discretion, protected by some kind of lock on 32 bits.
 *
 * TODO: use write{q,l}_relaxed()
 */

static inline void mlx5_write64(__be32 val[2], void __iomem *dest)
{
#if BITS_PER_LONG == 64
	__raw_writeq(*(u64 *)val, dest);
#else
	__raw_writel((__force u32) val[0], dest);
	__raw_writel((__force u32) val[1], dest + 4);
#endif
}

#endif /* MLX5_DOORBELL_H */

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⬅ linux 18 item

Nama	Tipe	Ukuran	Diubah	Perm	Aksi
📄 cq.h	h	5.8 KB	10/03/24 20:38	0644	✏️ ⬇
📄 device.h	h	36.8 KB	26/05/26 09:55	0644	✏️ ⬇
📄 doorbell.h	h	2.2 KB	10/03/24 20:38	0644	✏️ ⬇
📄 driver.h	h	36.8 KB	26/05/26 09:55	0644	✏️ ⬇
📄 eq.h	h	1.7 KB	10/03/24 20:38	0644	✏️ ⬇
📄 eswitch.h	h	6.9 KB	26/05/26 09:55	0644	✏️ ⬇
📄 fs.h	h	9.7 KB	26/05/26 09:55	0644	✏️ ⬇
📄 fs_helpers.h	h	2.9 KB	10/03/24 20:38	0644	✏️ ⬇
📄 macsec.h	h	1.1 KB	10/03/24 20:38	0644	✏️ ⬇
📄 mlx5_ifc.h	h	299 KB	26/05/26 09:55	0644	✏️ ⬇
📄 mlx5_ifc_fpga.h	h	8.9 KB	10/03/24 20:38	0644	✏️ ⬇
📄 mlx5_ifc_vdpa.h	h	5.5 KB	10/03/24 20:38	0644	✏️ ⬇
📄 mpfs.h	h	540 B	10/03/24 20:38	0644	✏️ ⬇
📄 port.h	h	4.6 KB	26/05/26 09:55	0644	✏️ ⬇
📄 qp.h	h	12.5 KB	26/05/26 09:55	0644	✏️ ⬇
📄 rsc_dump.h	h	1.3 KB	10/03/24 20:38	0644	✏️ ⬇
📄 transobj.h	h	3.5 KB	10/03/24 20:38	0644	✏️ ⬇
📄 vport.h	h	5.7 KB	10/03/24 20:38	0644	✏️ ⬇

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