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a2dd6877b4
This patch provide APIs to allow client drivers to support probe deferral. On K2G SoC, devices can be probed only after the ti_sci_pm_domains driver is probed and ready. As drivers may get probed at different order, any driver that depends on knav dma and qmss drivers, for example netcp network driver, needs to defer probe until knav devices are probed and ready to service. To do this, add an API to query the device ready status from the knav dma and qmss devices. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
91 lines
3 KiB
C
91 lines
3 KiB
C
/*
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* Keystone Navigator Queue Management Sub-System header
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*
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* Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
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* Author: Sandeep Nair <sandeep_n@ti.com>
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* Cyril Chemparathy <cyril@ti.com>
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* Santosh Shilimkar <santosh.shilimkar@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __SOC_TI_KNAV_QMSS_H__
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#define __SOC_TI_KNAV_QMSS_H__
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#include <linux/err.h>
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#include <linux/time.h>
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#include <linux/atomic.h>
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#include <linux/device.h>
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#include <linux/fcntl.h>
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#include <linux/dma-mapping.h>
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/* queue types */
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#define KNAV_QUEUE_QPEND ((unsigned)-2) /* interruptible qpend queue */
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#define KNAV_QUEUE_ACC ((unsigned)-3) /* Accumulated queue */
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#define KNAV_QUEUE_GP ((unsigned)-4) /* General purpose queue */
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/* queue flags */
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#define KNAV_QUEUE_SHARED 0x0001 /* Queue can be shared */
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/**
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* enum knav_queue_ctrl_cmd - queue operations.
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* @KNAV_QUEUE_GET_ID: Get the ID number for an open queue
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* @KNAV_QUEUE_FLUSH: forcibly empty a queue if possible
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* @KNAV_QUEUE_SET_NOTIFIER: Set a notifier callback to a queue handle.
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* @KNAV_QUEUE_ENABLE_NOTIFY: Enable notifier callback for a queue handle.
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* @KNAV_QUEUE_DISABLE_NOTIFY: Disable notifier callback for a queue handle.
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* @KNAV_QUEUE_GET_COUNT: Get number of queues.
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*/
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enum knav_queue_ctrl_cmd {
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KNAV_QUEUE_GET_ID,
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KNAV_QUEUE_FLUSH,
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KNAV_QUEUE_SET_NOTIFIER,
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KNAV_QUEUE_ENABLE_NOTIFY,
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KNAV_QUEUE_DISABLE_NOTIFY,
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KNAV_QUEUE_GET_COUNT
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};
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/* Queue notifier callback prototype */
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typedef void (*knav_queue_notify_fn)(void *arg);
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/**
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* struct knav_queue_notify_config: Notifier configuration
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* @fn: Notifier function
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* @fn_arg: Notifier function arguments
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*/
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struct knav_queue_notify_config {
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knav_queue_notify_fn fn;
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void *fn_arg;
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};
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void *knav_queue_open(const char *name, unsigned id,
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unsigned flags);
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void knav_queue_close(void *qhandle);
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int knav_queue_device_control(void *qhandle,
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enum knav_queue_ctrl_cmd cmd,
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unsigned long arg);
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dma_addr_t knav_queue_pop(void *qhandle, unsigned *size);
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int knav_queue_push(void *qhandle, dma_addr_t dma,
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unsigned size, unsigned flags);
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void *knav_pool_create(const char *name,
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int num_desc, int region_id);
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void knav_pool_destroy(void *ph);
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int knav_pool_count(void *ph);
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void *knav_pool_desc_get(void *ph);
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void knav_pool_desc_put(void *ph, void *desc);
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int knav_pool_desc_map(void *ph, void *desc, unsigned size,
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dma_addr_t *dma, unsigned *dma_sz);
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void *knav_pool_desc_unmap(void *ph, dma_addr_t dma, unsigned dma_sz);
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dma_addr_t knav_pool_desc_virt_to_dma(void *ph, void *virt);
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void *knav_pool_desc_dma_to_virt(void *ph, dma_addr_t dma);
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bool knav_qmss_device_ready(void);
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#endif /* __SOC_TI_KNAV_QMSS_H__ */
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