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![Ioana Ciornei](/assets/img/avatar_default.png)
Allocatable devices can be acquired by drivers on the fsl-mc bus using the fsl_mc_portal_allocate or fsl_mc_object_allocate functions. Add a device link between the consumer device and the supplier device so that proper resource management is achieved. Also, adding a link between these devices ensures that a proper unbind order is respected (ie before the supplier device is unbound from its respective driver all consumer devices will be notified and unbound first). Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com> Reviewed-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> Signed-off-by: Li Yang <leoyang.li@nxp.com>
577 lines
17 KiB
C
577 lines
17 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Freescale Management Complex (MC) bus public interface
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*
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* Copyright (C) 2014-2016 Freescale Semiconductor, Inc.
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* Author: German Rivera <German.Rivera@freescale.com>
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*
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*/
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#ifndef _FSL_MC_H_
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#define _FSL_MC_H_
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#include <linux/device.h>
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#include <linux/mod_devicetable.h>
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#include <linux/interrupt.h>
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#define FSL_MC_VENDOR_FREESCALE 0x1957
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struct irq_domain;
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struct msi_domain_info;
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struct fsl_mc_device;
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struct fsl_mc_io;
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/**
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* struct fsl_mc_driver - MC object device driver object
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* @driver: Generic device driver
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* @match_id_table: table of supported device matching Ids
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* @probe: Function called when a device is added
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* @remove: Function called when a device is removed
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* @shutdown: Function called at shutdown time to quiesce the device
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* @suspend: Function called when a device is stopped
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* @resume: Function called when a device is resumed
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*
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* Generic DPAA device driver object for device drivers that are registered
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* with a DPRC bus. This structure is to be embedded in each device-specific
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* driver structure.
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*/
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struct fsl_mc_driver {
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struct device_driver driver;
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const struct fsl_mc_device_id *match_id_table;
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int (*probe)(struct fsl_mc_device *dev);
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int (*remove)(struct fsl_mc_device *dev);
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void (*shutdown)(struct fsl_mc_device *dev);
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int (*suspend)(struct fsl_mc_device *dev, pm_message_t state);
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int (*resume)(struct fsl_mc_device *dev);
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};
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#define to_fsl_mc_driver(_drv) \
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container_of(_drv, struct fsl_mc_driver, driver)
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/**
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* enum fsl_mc_pool_type - Types of allocatable MC bus resources
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*
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* Entries in these enum are used as indices in the array of resource
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* pools of an fsl_mc_bus object.
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*/
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enum fsl_mc_pool_type {
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FSL_MC_POOL_DPMCP = 0x0, /* corresponds to "dpmcp" in the MC */
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FSL_MC_POOL_DPBP, /* corresponds to "dpbp" in the MC */
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FSL_MC_POOL_DPCON, /* corresponds to "dpcon" in the MC */
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FSL_MC_POOL_IRQ,
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/*
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* NOTE: New resource pool types must be added before this entry
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*/
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FSL_MC_NUM_POOL_TYPES
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};
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/**
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* struct fsl_mc_resource - MC generic resource
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* @type: type of resource
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* @id: unique MC resource Id within the resources of the same type
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* @data: pointer to resource-specific data if the resource is currently
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* allocated, or NULL if the resource is not currently allocated.
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* @parent_pool: pointer to the parent resource pool from which this
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* resource is allocated from.
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* @node: Node in the free list of the corresponding resource pool
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*
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* NOTE: This structure is to be embedded as a field of specific
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* MC resource structures.
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*/
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struct fsl_mc_resource {
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enum fsl_mc_pool_type type;
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s32 id;
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void *data;
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struct fsl_mc_resource_pool *parent_pool;
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struct list_head node;
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};
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/**
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* struct fsl_mc_device_irq - MC object device message-based interrupt
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* @msi_desc: pointer to MSI descriptor allocated by fsl_mc_msi_alloc_descs()
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* @mc_dev: MC object device that owns this interrupt
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* @dev_irq_index: device-relative IRQ index
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* @resource: MC generic resource associated with the interrupt
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*/
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struct fsl_mc_device_irq {
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struct msi_desc *msi_desc;
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struct fsl_mc_device *mc_dev;
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u8 dev_irq_index;
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struct fsl_mc_resource resource;
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};
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#define to_fsl_mc_irq(_mc_resource) \
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container_of(_mc_resource, struct fsl_mc_device_irq, resource)
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/* Opened state - Indicates that an object is open by at least one owner */
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#define FSL_MC_OBJ_STATE_OPEN 0x00000001
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/* Plugged state - Indicates that the object is plugged */
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#define FSL_MC_OBJ_STATE_PLUGGED 0x00000002
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/**
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* Shareability flag - Object flag indicating no memory shareability.
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* the object generates memory accesses that are non coherent with other
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* masters;
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* user is responsible for proper memory handling through IOMMU configuration.
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*/
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#define FSL_MC_OBJ_FLAG_NO_MEM_SHAREABILITY 0x0001
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/**
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* struct fsl_mc_obj_desc - Object descriptor
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* @type: Type of object: NULL terminated string
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* @id: ID of logical object resource
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* @vendor: Object vendor identifier
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* @ver_major: Major version number
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* @ver_minor: Minor version number
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* @irq_count: Number of interrupts supported by the object
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* @region_count: Number of mappable regions supported by the object
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* @state: Object state: combination of FSL_MC_OBJ_STATE_ states
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* @label: Object label: NULL terminated string
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* @flags: Object's flags
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*/
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struct fsl_mc_obj_desc {
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char type[16];
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int id;
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u16 vendor;
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u16 ver_major;
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u16 ver_minor;
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u8 irq_count;
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u8 region_count;
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u32 state;
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char label[16];
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u16 flags;
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};
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/**
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* Bit masks for a MC object device (struct fsl_mc_device) flags
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*/
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#define FSL_MC_IS_DPRC 0x0001
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/**
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* struct fsl_mc_device - MC object device object
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* @dev: Linux driver model device object
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* @dma_mask: Default DMA mask
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* @flags: MC object device flags
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* @icid: Isolation context ID for the device
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* @mc_handle: MC handle for the corresponding MC object opened
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* @mc_io: Pointer to MC IO object assigned to this device or
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* NULL if none.
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* @obj_desc: MC description of the DPAA device
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* @regions: pointer to array of MMIO region entries
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* @irqs: pointer to array of pointers to interrupts allocated to this device
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* @resource: generic resource associated with this MC object device, if any.
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*
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* Generic device object for MC object devices that are "attached" to a
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* MC bus.
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*
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* NOTES:
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* - For a non-DPRC object its icid is the same as its parent DPRC's icid.
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* - The SMMU notifier callback gets invoked after device_add() has been
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* called for an MC object device, but before the device-specific probe
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* callback gets called.
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* - DP_OBJ_DPRC objects are the only MC objects that have built-in MC
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* portals. For all other MC objects, their device drivers are responsible for
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* allocating MC portals for them by calling fsl_mc_portal_allocate().
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* - Some types of MC objects (e.g., DP_OBJ_DPBP, DP_OBJ_DPCON) are
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* treated as resources that can be allocated/deallocated from the
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* corresponding resource pool in the object's parent DPRC, using the
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* fsl_mc_object_allocate()/fsl_mc_object_free() functions. These MC objects
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* are known as "allocatable" objects. For them, the corresponding
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* fsl_mc_device's 'resource' points to the associated resource object.
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* For MC objects that are not allocatable (e.g., DP_OBJ_DPRC, DP_OBJ_DPNI),
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* 'resource' is NULL.
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*/
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struct fsl_mc_device {
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struct device dev;
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u64 dma_mask;
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u16 flags;
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u16 icid;
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u16 mc_handle;
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struct fsl_mc_io *mc_io;
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struct fsl_mc_obj_desc obj_desc;
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struct resource *regions;
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struct fsl_mc_device_irq **irqs;
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struct fsl_mc_resource *resource;
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struct device_link *consumer_link;
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};
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#define to_fsl_mc_device(_dev) \
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container_of(_dev, struct fsl_mc_device, dev)
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#define MC_CMD_NUM_OF_PARAMS 7
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struct mc_cmd_header {
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u8 src_id;
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u8 flags_hw;
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u8 status;
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u8 flags_sw;
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__le16 token;
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__le16 cmd_id;
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};
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struct fsl_mc_command {
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__le64 header;
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__le64 params[MC_CMD_NUM_OF_PARAMS];
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};
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enum mc_cmd_status {
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MC_CMD_STATUS_OK = 0x0, /* Completed successfully */
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MC_CMD_STATUS_READY = 0x1, /* Ready to be processed */
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MC_CMD_STATUS_AUTH_ERR = 0x3, /* Authentication error */
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MC_CMD_STATUS_NO_PRIVILEGE = 0x4, /* No privilege */
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MC_CMD_STATUS_DMA_ERR = 0x5, /* DMA or I/O error */
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MC_CMD_STATUS_CONFIG_ERR = 0x6, /* Configuration error */
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MC_CMD_STATUS_TIMEOUT = 0x7, /* Operation timed out */
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MC_CMD_STATUS_NO_RESOURCE = 0x8, /* No resources */
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MC_CMD_STATUS_NO_MEMORY = 0x9, /* No memory available */
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MC_CMD_STATUS_BUSY = 0xA, /* Device is busy */
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MC_CMD_STATUS_UNSUPPORTED_OP = 0xB, /* Unsupported operation */
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MC_CMD_STATUS_INVALID_STATE = 0xC /* Invalid state */
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};
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/*
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* MC command flags
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*/
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/* High priority flag */
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#define MC_CMD_FLAG_PRI 0x80
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/* Command completion flag */
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#define MC_CMD_FLAG_INTR_DIS 0x01
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static inline __le64 mc_encode_cmd_header(u16 cmd_id,
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u32 cmd_flags,
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u16 token)
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{
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__le64 header = 0;
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struct mc_cmd_header *hdr = (struct mc_cmd_header *)&header;
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hdr->cmd_id = cpu_to_le16(cmd_id);
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hdr->token = cpu_to_le16(token);
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hdr->status = MC_CMD_STATUS_READY;
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if (cmd_flags & MC_CMD_FLAG_PRI)
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hdr->flags_hw = MC_CMD_FLAG_PRI;
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if (cmd_flags & MC_CMD_FLAG_INTR_DIS)
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hdr->flags_sw = MC_CMD_FLAG_INTR_DIS;
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return header;
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}
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static inline u16 mc_cmd_hdr_read_token(struct fsl_mc_command *cmd)
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{
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struct mc_cmd_header *hdr = (struct mc_cmd_header *)&cmd->header;
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u16 token = le16_to_cpu(hdr->token);
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return token;
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}
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struct mc_rsp_create {
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__le32 object_id;
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};
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struct mc_rsp_api_ver {
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__le16 major_ver;
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__le16 minor_ver;
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};
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static inline u32 mc_cmd_read_object_id(struct fsl_mc_command *cmd)
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{
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struct mc_rsp_create *rsp_params;
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rsp_params = (struct mc_rsp_create *)cmd->params;
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return le32_to_cpu(rsp_params->object_id);
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}
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static inline void mc_cmd_read_api_version(struct fsl_mc_command *cmd,
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u16 *major_ver,
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u16 *minor_ver)
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{
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struct mc_rsp_api_ver *rsp_params;
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rsp_params = (struct mc_rsp_api_ver *)cmd->params;
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*major_ver = le16_to_cpu(rsp_params->major_ver);
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*minor_ver = le16_to_cpu(rsp_params->minor_ver);
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}
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/**
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* Bit masks for a MC I/O object (struct fsl_mc_io) flags
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*/
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#define FSL_MC_IO_ATOMIC_CONTEXT_PORTAL 0x0001
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/**
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* struct fsl_mc_io - MC I/O object to be passed-in to mc_send_command()
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* @dev: device associated with this Mc I/O object
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* @flags: flags for mc_send_command()
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* @portal_size: MC command portal size in bytes
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* @portal_phys_addr: MC command portal physical address
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* @portal_virt_addr: MC command portal virtual address
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* @dpmcp_dev: pointer to the DPMCP device associated with the MC portal.
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*
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* Fields are only meaningful if the FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is not
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* set:
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* @mutex: Mutex to serialize mc_send_command() calls that use the same MC
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* portal, if the fsl_mc_io object was created with the
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* FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag off. mc_send_command() calls for this
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* fsl_mc_io object must be made only from non-atomic context.
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*
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* Fields are only meaningful if the FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is
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* set:
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* @spinlock: Spinlock to serialize mc_send_command() calls that use the same MC
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* portal, if the fsl_mc_io object was created with the
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* FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag on. mc_send_command() calls for this
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* fsl_mc_io object can be made from atomic or non-atomic context.
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*/
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struct fsl_mc_io {
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struct device *dev;
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u16 flags;
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u32 portal_size;
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phys_addr_t portal_phys_addr;
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void __iomem *portal_virt_addr;
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struct fsl_mc_device *dpmcp_dev;
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union {
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/*
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* This field is only meaningful if the
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* FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is not set
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*/
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struct mutex mutex; /* serializes mc_send_command() */
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/*
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* This field is only meaningful if the
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* FSL_MC_IO_ATOMIC_CONTEXT_PORTAL flag is set
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*/
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spinlock_t spinlock; /* serializes mc_send_command() */
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};
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};
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int mc_send_command(struct fsl_mc_io *mc_io, struct fsl_mc_command *cmd);
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#ifdef CONFIG_FSL_MC_BUS
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#define dev_is_fsl_mc(_dev) ((_dev)->bus == &fsl_mc_bus_type)
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#else
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/* If fsl-mc bus is not present device cannot belong to fsl-mc bus */
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#define dev_is_fsl_mc(_dev) (0)
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#endif
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/* Macro to check if a device is a container device */
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#define fsl_mc_is_cont_dev(_dev) (to_fsl_mc_device(_dev)->flags & \
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FSL_MC_IS_DPRC)
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/* Macro to get the container device of a MC device */
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#define fsl_mc_cont_dev(_dev) (fsl_mc_is_cont_dev(_dev) ? \
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(_dev) : (_dev)->parent)
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/*
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* module_fsl_mc_driver() - Helper macro for drivers that don't do
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* anything special in module init/exit. This eliminates a lot of
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* boilerplate. Each module may only use this macro once, and
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* calling it replaces module_init() and module_exit()
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*/
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#define module_fsl_mc_driver(__fsl_mc_driver) \
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module_driver(__fsl_mc_driver, fsl_mc_driver_register, \
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fsl_mc_driver_unregister)
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/*
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* Macro to avoid include chaining to get THIS_MODULE
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*/
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#define fsl_mc_driver_register(drv) \
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__fsl_mc_driver_register(drv, THIS_MODULE)
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int __must_check __fsl_mc_driver_register(struct fsl_mc_driver *fsl_mc_driver,
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struct module *owner);
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void fsl_mc_driver_unregister(struct fsl_mc_driver *driver);
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int __must_check fsl_mc_portal_allocate(struct fsl_mc_device *mc_dev,
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u16 mc_io_flags,
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struct fsl_mc_io **new_mc_io);
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void fsl_mc_portal_free(struct fsl_mc_io *mc_io);
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int fsl_mc_portal_reset(struct fsl_mc_io *mc_io);
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int __must_check fsl_mc_object_allocate(struct fsl_mc_device *mc_dev,
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enum fsl_mc_pool_type pool_type,
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struct fsl_mc_device **new_mc_adev);
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void fsl_mc_object_free(struct fsl_mc_device *mc_adev);
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struct irq_domain *fsl_mc_msi_create_irq_domain(struct fwnode_handle *fwnode,
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struct msi_domain_info *info,
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struct irq_domain *parent);
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int __must_check fsl_mc_allocate_irqs(struct fsl_mc_device *mc_dev);
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void fsl_mc_free_irqs(struct fsl_mc_device *mc_dev);
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extern struct bus_type fsl_mc_bus_type;
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extern struct device_type fsl_mc_bus_dprc_type;
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extern struct device_type fsl_mc_bus_dpni_type;
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extern struct device_type fsl_mc_bus_dpio_type;
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extern struct device_type fsl_mc_bus_dpsw_type;
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extern struct device_type fsl_mc_bus_dpbp_type;
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extern struct device_type fsl_mc_bus_dpcon_type;
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extern struct device_type fsl_mc_bus_dpmcp_type;
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extern struct device_type fsl_mc_bus_dpmac_type;
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extern struct device_type fsl_mc_bus_dprtc_type;
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extern struct device_type fsl_mc_bus_dpseci_type;
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static inline bool is_fsl_mc_bus_dprc(const struct fsl_mc_device *mc_dev)
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{
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return mc_dev->dev.type == &fsl_mc_bus_dprc_type;
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}
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static inline bool is_fsl_mc_bus_dpni(const struct fsl_mc_device *mc_dev)
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{
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return mc_dev->dev.type == &fsl_mc_bus_dpni_type;
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}
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static inline bool is_fsl_mc_bus_dpio(const struct fsl_mc_device *mc_dev)
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{
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return mc_dev->dev.type == &fsl_mc_bus_dpio_type;
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}
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static inline bool is_fsl_mc_bus_dpsw(const struct fsl_mc_device *mc_dev)
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{
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return mc_dev->dev.type == &fsl_mc_bus_dpsw_type;
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}
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static inline bool is_fsl_mc_bus_dpbp(const struct fsl_mc_device *mc_dev)
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{
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return mc_dev->dev.type == &fsl_mc_bus_dpbp_type;
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}
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static inline bool is_fsl_mc_bus_dpcon(const struct fsl_mc_device *mc_dev)
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{
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return mc_dev->dev.type == &fsl_mc_bus_dpcon_type;
|
|
}
|
|
|
|
static inline bool is_fsl_mc_bus_dpmcp(const struct fsl_mc_device *mc_dev)
|
|
{
|
|
return mc_dev->dev.type == &fsl_mc_bus_dpmcp_type;
|
|
}
|
|
|
|
static inline bool is_fsl_mc_bus_dpmac(const struct fsl_mc_device *mc_dev)
|
|
{
|
|
return mc_dev->dev.type == &fsl_mc_bus_dpmac_type;
|
|
}
|
|
|
|
static inline bool is_fsl_mc_bus_dprtc(const struct fsl_mc_device *mc_dev)
|
|
{
|
|
return mc_dev->dev.type == &fsl_mc_bus_dprtc_type;
|
|
}
|
|
|
|
static inline bool is_fsl_mc_bus_dpseci(const struct fsl_mc_device *mc_dev)
|
|
{
|
|
return mc_dev->dev.type == &fsl_mc_bus_dpseci_type;
|
|
}
|
|
|
|
/*
|
|
* Data Path Buffer Pool (DPBP) API
|
|
* Contains initialization APIs and runtime control APIs for DPBP
|
|
*/
|
|
|
|
int dpbp_open(struct fsl_mc_io *mc_io,
|
|
u32 cmd_flags,
|
|
int dpbp_id,
|
|
u16 *token);
|
|
|
|
int dpbp_close(struct fsl_mc_io *mc_io,
|
|
u32 cmd_flags,
|
|
u16 token);
|
|
|
|
int dpbp_enable(struct fsl_mc_io *mc_io,
|
|
u32 cmd_flags,
|
|
u16 token);
|
|
|
|
int dpbp_disable(struct fsl_mc_io *mc_io,
|
|
u32 cmd_flags,
|
|
u16 token);
|
|
|
|
int dpbp_reset(struct fsl_mc_io *mc_io,
|
|
u32 cmd_flags,
|
|
u16 token);
|
|
|
|
/**
|
|
* struct dpbp_attr - Structure representing DPBP attributes
|
|
* @id: DPBP object ID
|
|
* @bpid: Hardware buffer pool ID; should be used as an argument in
|
|
* acquire/release operations on buffers
|
|
*/
|
|
struct dpbp_attr {
|
|
int id;
|
|
u16 bpid;
|
|
};
|
|
|
|
int dpbp_get_attributes(struct fsl_mc_io *mc_io,
|
|
u32 cmd_flags,
|
|
u16 token,
|
|
struct dpbp_attr *attr);
|
|
|
|
/* Data Path Concentrator (DPCON) API
|
|
* Contains initialization APIs and runtime control APIs for DPCON
|
|
*/
|
|
|
|
/**
|
|
* Use it to disable notifications; see dpcon_set_notification()
|
|
*/
|
|
#define DPCON_INVALID_DPIO_ID (int)(-1)
|
|
|
|
int dpcon_open(struct fsl_mc_io *mc_io,
|
|
u32 cmd_flags,
|
|
int dpcon_id,
|
|
u16 *token);
|
|
|
|
int dpcon_close(struct fsl_mc_io *mc_io,
|
|
u32 cmd_flags,
|
|
u16 token);
|
|
|
|
int dpcon_enable(struct fsl_mc_io *mc_io,
|
|
u32 cmd_flags,
|
|
u16 token);
|
|
|
|
int dpcon_disable(struct fsl_mc_io *mc_io,
|
|
u32 cmd_flags,
|
|
u16 token);
|
|
|
|
int dpcon_reset(struct fsl_mc_io *mc_io,
|
|
u32 cmd_flags,
|
|
u16 token);
|
|
|
|
/**
|
|
* struct dpcon_attr - Structure representing DPCON attributes
|
|
* @id: DPCON object ID
|
|
* @qbman_ch_id: Channel ID to be used by dequeue operation
|
|
* @num_priorities: Number of priorities for the DPCON channel (1-8)
|
|
*/
|
|
struct dpcon_attr {
|
|
int id;
|
|
u16 qbman_ch_id;
|
|
u8 num_priorities;
|
|
};
|
|
|
|
int dpcon_get_attributes(struct fsl_mc_io *mc_io,
|
|
u32 cmd_flags,
|
|
u16 token,
|
|
struct dpcon_attr *attr);
|
|
|
|
/**
|
|
* struct dpcon_notification_cfg - Structure representing notification params
|
|
* @dpio_id: DPIO object ID; must be configured with a notification channel;
|
|
* to disable notifications set it to 'DPCON_INVALID_DPIO_ID';
|
|
* @priority: Priority selection within the DPIO channel; valid values
|
|
* are 0-7, depending on the number of priorities in that channel
|
|
* @user_ctx: User context value provided with each CDAN message
|
|
*/
|
|
struct dpcon_notification_cfg {
|
|
int dpio_id;
|
|
u8 priority;
|
|
u64 user_ctx;
|
|
};
|
|
|
|
int dpcon_set_notification(struct fsl_mc_io *mc_io,
|
|
u32 cmd_flags,
|
|
u16 token,
|
|
struct dpcon_notification_cfg *cfg);
|
|
|
|
#endif /* _FSL_MC_H_ */
|