mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
17fcb3dc12
This is [1/3] part of hinic3 Ethernet driver initial submission. With this patch hinic3 is a valid kernel module but non-functional driver. The driver parts contained in this patch: Module initialization. PCI driver registration but with empty id_table. Auxiliary driver registration. Net device_ops registration but open/stop are empty stubs. tx/rx logic. All major data structures of the driver are fully introduced with the code that uses them but without their initialization code that requires management interface with the hw. Co-developed-by: Xin Guo <guoxin09@huawei.com> Signed-off-by: Xin Guo <guoxin09@huawei.com> Signed-off-by: Fan Gong <gongfan1@huawei.com> Co-developed-by: Gur Stavi <gur.stavi@huawei.com> Signed-off-by: Gur Stavi <gur.stavi@huawei.com> Link: https://patch.msgid.link/76a137ffdfe115c737c2c224f0c93b60ba53cc16.1747736586.git.gur.stavi@huawei.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/* Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved. */
|
|
|
|
#ifndef _HINIC3_QUEUE_COMMON_H_
|
|
#define _HINIC3_QUEUE_COMMON_H_
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include "hinic3_common.h"
|
|
|
|
struct hinic3_hwdev;
|
|
|
|
struct hinic3_queue_pages {
|
|
/* Array of DMA-able pages that actually holds the queue entries. */
|
|
struct hinic3_dma_addr_align *pages;
|
|
/* Page size in bytes. */
|
|
u32 page_size;
|
|
/* Number of pages, must be power of 2. */
|
|
u16 num_pages;
|
|
u8 elem_size_shift;
|
|
u8 elem_per_pg_shift;
|
|
};
|
|
|
|
void hinic3_queue_pages_init(struct hinic3_queue_pages *qpages, u32 q_depth,
|
|
u32 page_size, u32 elem_size);
|
|
int hinic3_queue_pages_alloc(struct hinic3_hwdev *hwdev,
|
|
struct hinic3_queue_pages *qpages, u32 align);
|
|
void hinic3_queue_pages_free(struct hinic3_hwdev *hwdev,
|
|
struct hinic3_queue_pages *qpages);
|
|
|
|
/* Get pointer to queue entry at the specified index. Index does not have to be
|
|
* masked to queue depth, only least significant bits will be used. Also
|
|
* provides remaining elements in same page (including the first one) in case
|
|
* caller needs multiple entries.
|
|
*/
|
|
static inline void *get_q_element(const struct hinic3_queue_pages *qpages,
|
|
u32 idx, u32 *remaining_in_page)
|
|
{
|
|
const struct hinic3_dma_addr_align *page;
|
|
u32 page_idx, elem_idx, elem_per_pg, ofs;
|
|
u8 shift;
|
|
|
|
shift = qpages->elem_per_pg_shift;
|
|
page_idx = (idx >> shift) & (qpages->num_pages - 1);
|
|
elem_per_pg = 1 << shift;
|
|
elem_idx = idx & (elem_per_pg - 1);
|
|
if (remaining_in_page)
|
|
*remaining_in_page = elem_per_pg - elem_idx;
|
|
ofs = elem_idx << qpages->elem_size_shift;
|
|
page = qpages->pages + page_idx;
|
|
return (char *)page->align_vaddr + ofs;
|
|
}
|
|
|
|
#endif
|