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ba764c4dad
This patch incorporates three source files (and their headers). They're
grouped into one patch mainly for the purpose of making the number and
size of patches in this series somewhat reasonable.
- "ipa_clock.c" and "ipa_clock.h" implement clocking for the IPA device.
The IPA has a single core clock managed by the common clock framework.
In addition, the IPA has three buses whose bandwidth is managed by the
Linux interconnect framework. At this time the core clock and all
three buses are either on or off; we don't yet do any more fine-grained
management than that. The core clock and interconnects are enabled
and disabled as a unit, using a unified clock-like abstraction,
ipa_clock_get()/ipa_clock_put().
- "ipa_interrupt.c" and "ipa_interrupt.h" implement IPA interrupts.
There are two hardware IRQs used by the IPA driver (the other is
the GSI interrupt, described in a separate patch). Several types
of interrupt are handled by the IPA IRQ handler; these are not part
of data/fast path.
- The IPA has a region of local memory that is accessible by the AP
(and modem). Within that region are areas with certain defined
purposes. "ipa_mem.c" and "ipa_mem.h" define those regions, and
implement their initialization.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
90 lines
3.1 KiB
C
90 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
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* Copyright (C) 2019-2020 Linaro Ltd.
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*/
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#ifndef _IPA_MEM_H_
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#define _IPA_MEM_H_
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struct ipa;
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/**
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* DOC: IPA Local Memory
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*
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* The IPA has a block of shared memory, divided into regions used for
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* specific purposes.
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*
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* The regions within the shared block are bounded by an offset (relative to
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* the "ipa-shared" memory range) and size found in the IPA_SHARED_MEM_SIZE
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* register.
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*
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* Each region is optionally preceded by one or more 32-bit "canary" values.
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* These are meant to detect out-of-range writes (if they become corrupted).
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* A given region (such as a filter or routing table) has the same number
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* of canaries for all IPA hardware versions. Still, the number used is
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* defined in the config data, allowing for generic handling of regions.
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*
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* The set of memory regions is defined in configuration data. They are
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* subject to these constraints:
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* - a zero offset and zero size represents and undefined region
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* - a region's offset is defined to be *past* all "canary" values
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* - offset must be large enough to account for all canaries
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* - a region's size may be zero, but may still have canaries
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* - all offsets must be 8-byte aligned
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* - most sizes must be a multiple of 8
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* - modem memory size must be a multiple of 4
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* - the microcontroller ring offset must be a multiple of 1024
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*/
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/* The maximum allowed size for any memory region */
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#define IPA_MEM_MAX (2 * PAGE_SIZE)
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/* IPA-resident memory region ids */
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enum ipa_mem_id {
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IPA_MEM_UC_SHARED, /* 0 canaries */
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IPA_MEM_UC_INFO, /* 0 canaries */
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IPA_MEM_V4_FILTER_HASHED, /* 2 canaries */
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IPA_MEM_V4_FILTER, /* 2 canaries */
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IPA_MEM_V6_FILTER_HASHED, /* 2 canaries */
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IPA_MEM_V6_FILTER, /* 2 canaries */
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IPA_MEM_V4_ROUTE_HASHED, /* 2 canaries */
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IPA_MEM_V4_ROUTE, /* 2 canaries */
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IPA_MEM_V6_ROUTE_HASHED, /* 2 canaries */
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IPA_MEM_V6_ROUTE, /* 2 canaries */
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IPA_MEM_MODEM_HEADER, /* 2 canaries */
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IPA_MEM_AP_HEADER, /* 0 canaries */
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IPA_MEM_MODEM_PROC_CTX, /* 2 canaries */
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IPA_MEM_AP_PROC_CTX, /* 0 canaries */
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IPA_MEM_PDN_CONFIG, /* 2 canaries (IPA v4.0 and above) */
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IPA_MEM_STATS_QUOTA, /* 2 canaries (IPA v4.0 and above) */
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IPA_MEM_STATS_TETHERING, /* 0 canaries (IPA v4.0 and above) */
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IPA_MEM_STATS_DROP, /* 0 canaries (IPA v4.0 and above) */
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IPA_MEM_MODEM, /* 0 canaries */
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IPA_MEM_UC_EVENT_RING, /* 1 canary */
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IPA_MEM_COUNT, /* Number of regions (not an index) */
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};
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/**
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* struct ipa_mem - IPA local memory region description
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* @offset: offset in IPA memory space to base of the region
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* @size: size in bytes base of the region
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* @canary_count # 32-bit "canary" values that precede region
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*/
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struct ipa_mem {
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u32 offset;
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u16 size;
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u16 canary_count;
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};
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int ipa_mem_config(struct ipa *ipa);
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void ipa_mem_deconfig(struct ipa *ipa);
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int ipa_mem_setup(struct ipa *ipa);
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void ipa_mem_teardown(struct ipa *ipa);
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int ipa_mem_zero_modem(struct ipa *ipa);
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int ipa_mem_init(struct ipa *ipa, u32 count, const struct ipa_mem *mem);
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void ipa_mem_exit(struct ipa *ipa);
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#endif /* _IPA_MEM_H_ */
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