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/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
* Copyright (C) 2018-2020 Linaro Ltd.
*/
#ifndef _IPA_H_
#define _IPA_H_
#include <linux/types.h>
#include <linux/device.h>
#include <linux/notifier.h>
#include <linux/pm_wakeup.h>
#include "ipa_version.h"
#include "gsi.h"
#include "ipa_mem.h"
#include "ipa_qmi.h"
#include "ipa_endpoint.h"
#include "ipa_interrupt.h"
struct clk;
struct icc_path;
struct net_device;
struct platform_device;
struct ipa_clock;
struct ipa_smp2p;
struct ipa_interrupt;
/**
* enum ipa_flag - IPA state flags
* @IPA_FLAG_RESUMED: Whether resume from suspend has been signaled
* @IPA_FLAG_COUNT: Number of defined IPA flags
*/
enum ipa_flag {
IPA_FLAG_RESUMED,
IPA_FLAG_COUNT, /* Last; not a flag */
};
/**
* struct ipa - IPA information
* @gsi: Embedded GSI structure
* @flags: Boolean state flags
* @version: IPA hardware version
* @pdev: Platform device
* @completion: Used to signal pipeline clear transfer complete
* @smp2p: SMP2P information
* @clock: IPA clocking information
* @table_addr: DMA address of filter/route table content
* @table_virt: Virtual address of filter/route table content
* @interrupt: IPA Interrupt information
* @uc_loaded: true after microcontroller has reported it's ready
* @reg_addr: DMA address used for IPA register access
* @reg_virt: Virtual address used for IPA register access
* @mem_addr: DMA address of IPA-local memory space
* @mem_virt: Virtual address of IPA-local memory space
* @mem_offset: Offset from @mem_virt used for access to IPA memory
* @mem_size: Total size (bytes) of memory at @mem_virt
* @mem: Array of IPA-local memory region descriptors
* @imem_iova: I/O virtual address of IPA region in IMEM
* @imem_size; Size of IMEM region
* @smem_iova: I/O virtual address of IPA region in SMEM
* @smem_size; Size of SMEM region
* @zero_addr: DMA address of preallocated zero-filled memory
* @zero_virt: Virtual address of preallocated zero-filled memory
* @zero_size: Size (bytes) of preallocated zero-filled memory
* @wakeup_source: Wakeup source information
* @available: Bit mask indicating endpoints hardware supports
* @filter_map: Bit mask indicating endpoints that support filtering
* @initialized: Bit mask indicating endpoints initialized
* @set_up: Bit mask indicating endpoints set up
* @enabled: Bit mask indicating endpoints enabled
* @endpoint: Array of endpoint information
* @channel_map: Mapping of GSI channel to IPA endpoint
* @name_map: Mapping of IPA endpoint name to IPA endpoint
* @setup_complete: Flag indicating whether setup stage has completed
* @modem_state: State of modem (stopped, running)
* @modem_netdev: Network device structure used for modem
* @qmi: QMI information
*/
struct ipa {
struct gsi gsi;
DECLARE_BITMAP(flags, IPA_FLAG_COUNT);
enum ipa_version version;
struct platform_device *pdev;
struct completion completion;
struct notifier_block nb;
void *notifier;
struct ipa_smp2p *smp2p;
struct ipa_clock *clock;
dma_addr_t table_addr;
__le64 *table_virt;
struct ipa_interrupt *interrupt;
bool uc_loaded;
dma_addr_t reg_addr;
void __iomem *reg_virt;
dma_addr_t mem_addr;
void *mem_virt;
u32 mem_offset;
u32 mem_size;
const struct ipa_mem *mem;
unsigned long imem_iova;
size_t imem_size;
unsigned long smem_iova;
size_t smem_size;
dma_addr_t zero_addr;
void *zero_virt;
size_t zero_size;
/* Bit masks indicating endpoint state */
u32 available; /* supported by hardware */
u32 filter_map;
u32 initialized;
u32 set_up;
u32 enabled;
struct ipa_endpoint endpoint[IPA_ENDPOINT_MAX];
struct ipa_endpoint *channel_map[GSI_CHANNEL_COUNT_MAX];
struct ipa_endpoint *name_map[IPA_ENDPOINT_COUNT];
bool setup_complete;
atomic_t modem_state; /* enum ipa_modem_state */
struct net_device *modem_netdev;
struct ipa_qmi qmi;
};
/**
* ipa_setup() - Perform IPA setup
* @ipa: IPA pointer
*
* IPA initialization is broken into stages: init; config; and setup.
* (These have inverses exit, deconfig, and teardown.)
*
* Activities performed at the init stage can be done without requiring
* any access to IPA hardware. Activities performed at the config stage
* require the IPA clock to be running, because they involve access
* to IPA registers. The setup stage is performed only after the GSI
* hardware is ready (more on this below). The setup stage allows
* the AP to perform more complex initialization by issuing "immediate
* commands" using a special interface to the IPA.
*
* This function, @ipa_setup(), starts the setup stage.
*
* In order for the GSI hardware to be functional it needs firmware to be
* loaded (in addition to some other low-level initialization). This early
* GSI initialization can be done either by Trust Zone on the AP or by the
* modem.
*
* If it's done by Trust Zone, the AP loads the GSI firmware and supplies
* it to Trust Zone to verify and install. When this completes, if
* verification was successful, the GSI layer is ready and ipa_setup()
* implements the setup phase of initialization.
*
* If the modem performs early GSI initialization, the AP needs to know
* when this has occurred. An SMP2P interrupt is used for this purpose,
* and receipt of that interrupt triggers the call to ipa_setup().
*/
int ipa_setup(struct ipa *ipa);
#endif /* _IPA_H_ */
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