linux/drivers/net/wireless/ath/wil6210/pmc.c

// SPDX-License-Identifier: ISC
/*
 * Copyright (c) 2012-2015,2017 Qualcomm Atheros, Inc.
 * Copyright (c) 2018, The Linux Foundation. All rights reserved.
 */

#include <linux/types.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/seq_file.h>
#include "wmi.h"
#include "wil6210.h"
#include "txrx.h"
#include "pmc.h"

struct desc_alloc_info { … };

static int wil_is_pmc_allocated(struct pmc_ctx *pmc)
{ … }

void wil_pmc_init(struct wil6210_priv *wil)
{ … }

/* Allocate the physical ring (p-ring) and the required
 * number of descriptors of required size.
 * Initialize the descriptors as required by pmc dma.
 * The descriptors' buffers dwords are initialized to hold
 * dword's serial number in the lsw and reserved value
 * PCM_DATA_INVALID_DW_VAL in the msw.
 */
void wil_pmc_alloc(struct wil6210_priv *wil,
		   int num_descriptors,
		   int descriptor_size)
{ … }

/* Traverse the p-ring and release all buffers.
 * At the end release the p-ring memory
 */
void wil_pmc_free(struct wil6210_priv *wil, int send_pmc_cmd)
{ … }

/* Status of the last operation requested via debugfs: alloc/free/read.
 * 0 - success or negative errno
 */
int wil_pmc_last_cmd_status(struct wil6210_priv *wil)
{ … }

/* Read from required position up to the end of current descriptor,
 * depends on descriptor size configured during alloc request.
 */
ssize_t wil_pmc_read(struct file *filp, char __user *buf, size_t count,
		     loff_t *f_pos)
{ … }

loff_t wil_pmc_llseek(struct file *filp, loff_t off, int whence)
{ … }

int wil_pmcring_read(struct seq_file *s, void *data)
{ … }