321 lines
11 KiB
C
321 lines
11 KiB
C
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/*
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* Broadcom PCIE
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* Software-specific definitions shared between device and host side
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* Explains the shared area between host and dongle
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*
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* Portions of this code are copyright (c) 2017 Cypress Semiconductor Corporation
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*
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* Copyright (C) 1999-2017, Broadcom Corporation
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*
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* Unless you and Broadcom execute a separate written software license
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* agreement governing use of this software, this software is licensed to you
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* under the terms of the GNU General Public License version 2 (the "GPL"),
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* available at http://www.broadcom.com/licenses/GPLv2.php, with the
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* following added to such license:
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*
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* As a special exception, the copyright holders of this software give you
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* permission to link this software with independent modules, and to copy and
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* distribute the resulting executable under terms of your choice, provided that
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* you also meet, for each linked independent module, the terms and conditions of
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* the license of that module. An independent module is a module which is not
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* derived from this software. The special exception does not apply to any
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* modifications of the software.
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*
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* Notwithstanding the above, under no circumstances may you combine this
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* software in any way with any other Broadcom software provided under a license
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* other than the GPL, without Broadcom's express prior written consent.
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*
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*
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* <<Broadcom-WL-IPTag/Open:>>
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*
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* $Id: bcmpcie.h 604490 2015-12-07 15:48:45Z $
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*/
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#ifndef _bcmpcie_h_
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#define _bcmpcie_h_
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#include <bcmutils.h>
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#define ADDR_64(x) (x.addr)
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#define HIGH_ADDR_32(x) ((uint32) (((sh_addr_t) x).high_addr))
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#define LOW_ADDR_32(x) ((uint32) (((sh_addr_t) x).low_addr))
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typedef struct {
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uint32 low_addr;
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uint32 high_addr;
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} sh_addr_t;
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/* May be overridden by 43xxxxx-roml.mk */
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#if !defined(BCMPCIE_MAX_TX_FLOWS)
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#define BCMPCIE_MAX_TX_FLOWS 40
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#endif /* ! BCMPCIE_MAX_TX_FLOWS */
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/**
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* Feature flags enabled in dongle. Advertised by dongle to DHD via the PCIe Shared structure that
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* is located in device memory.
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*/
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#define PCIE_SHARED_VERSION 0x00005
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#define PCIE_SHARED_VERSION_MASK 0x000FF
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#define PCIE_SHARED_ASSERT_BUILT 0x00100
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#define PCIE_SHARED_ASSERT 0x00200
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#define PCIE_SHARED_TRAP 0x00400
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#define PCIE_SHARED_IN_BRPT 0x00800
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#define PCIE_SHARED_SET_BRPT 0x01000
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#define PCIE_SHARED_PENDING_BRPT 0x02000
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#define PCIE_SHARED_TXPUSH_SPRT 0x04000
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#define PCIE_SHARED_EVT_SEQNUM 0x08000
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#define PCIE_SHARED_DMA_INDEX 0x10000
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/**
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* There are host types where a device interrupt can 'race ahead' of data written by the device into
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* host memory. The dongle can avoid this condition using a variety of techniques (read barrier,
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* using PCIe Message Signalled Interrupts, or by using the PCIE_DMA_INDEX feature). Unfortunately
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* these techniques have drawbacks on router platforms. For these platforms, it was decided to not
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* avoid the condition, but to detect the condition instead and act on it.
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* D2H M2M DMA Complete Sync mechanism: Modulo-253-SeqNum or XORCSUM
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*/
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#define PCIE_SHARED_D2H_SYNC_SEQNUM 0x20000
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#define PCIE_SHARED_D2H_SYNC_XORCSUM 0x40000
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#define PCIE_SHARED_D2H_SYNC_MODE_MASK \
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(PCIE_SHARED_D2H_SYNC_SEQNUM | PCIE_SHARED_D2H_SYNC_XORCSUM)
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#define PCIE_SHARED_IDLE_FLOW_RING 0x80000
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#define PCIE_SHARED_2BYTE_INDICES 0x100000
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#define PCIE_SHARED_D2H_MAGIC 0xFEDCBA09
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#define PCIE_SHARED_H2D_MAGIC 0x12345678
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/**
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* Message rings convey messages between host and device. They are unidirectional, and are located
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* in host memory.
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*
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* This is the minimal set of message rings, known as 'common message rings':
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*/
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#define BCMPCIE_H2D_MSGRING_CONTROL_SUBMIT 0
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#define BCMPCIE_H2D_MSGRING_RXPOST_SUBMIT 1
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#define BCMPCIE_D2H_MSGRING_CONTROL_COMPLETE 2
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#define BCMPCIE_D2H_MSGRING_TX_COMPLETE 3
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#define BCMPCIE_D2H_MSGRING_RX_COMPLETE 4
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#define BCMPCIE_COMMON_MSGRING_MAX_ID 4
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#define BCMPCIE_H2D_COMMON_MSGRINGS 2
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#define BCMPCIE_D2H_COMMON_MSGRINGS 3
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#define BCMPCIE_COMMON_MSGRINGS 5
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#define BCMPCIE_H2D_MSGRINGS(max_tx_flows) \
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(BCMPCIE_H2D_COMMON_MSGRINGS + (max_tx_flows))
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/**
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* H2D and D2H, WR and RD index, are maintained in the following arrays:
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* - Array of all H2D WR Indices
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* - Array of all H2D RD Indices
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* - Array of all D2H WR Indices
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* - Array of all D2H RD Indices
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*
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* The offset of the WR or RD indexes (for common rings) in these arrays are
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* listed below. Arrays ARE NOT indexed by a ring's id.
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*
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* D2H common rings WR and RD index start from 0, even though their ringids
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* start from BCMPCIE_H2D_COMMON_MSGRINGS
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*/
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#define BCMPCIE_H2D_RING_IDX(h2d_ring_id) (h2d_ring_id)
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enum h2dring_idx {
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/* H2D common rings */
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BCMPCIE_H2D_MSGRING_CONTROL_SUBMIT_IDX =
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BCMPCIE_H2D_RING_IDX(BCMPCIE_H2D_MSGRING_CONTROL_SUBMIT),
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BCMPCIE_H2D_MSGRING_RXPOST_SUBMIT_IDX =
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BCMPCIE_H2D_RING_IDX(BCMPCIE_H2D_MSGRING_RXPOST_SUBMIT),
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/* First TxPost's WR or RD index starts after all H2D common rings */
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BCMPCIE_H2D_MSGRING_TXFLOW_IDX_START =
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BCMPCIE_H2D_RING_IDX(BCMPCIE_H2D_COMMON_MSGRINGS)
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};
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#define BCMPCIE_D2H_RING_IDX(d2h_ring_id) \
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((d2h_ring_id) - BCMPCIE_H2D_COMMON_MSGRINGS)
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enum d2hring_idx {
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/* D2H Common Rings */
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BCMPCIE_D2H_MSGRING_CONTROL_COMPLETE_IDX =
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BCMPCIE_D2H_RING_IDX(BCMPCIE_D2H_MSGRING_CONTROL_COMPLETE),
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BCMPCIE_D2H_MSGRING_TX_COMPLETE_IDX =
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BCMPCIE_D2H_RING_IDX(BCMPCIE_D2H_MSGRING_TX_COMPLETE),
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BCMPCIE_D2H_MSGRING_RX_COMPLETE_IDX =
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BCMPCIE_D2H_RING_IDX(BCMPCIE_D2H_MSGRING_RX_COMPLETE)
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};
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/**
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* Macros for managing arrays of RD WR indices:
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* rw_index_sz:
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* - in dongle, rw_index_sz is known at compile time
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* - in host/DHD, rw_index_sz is derived from advertized pci_shared flags
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*
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* ring_idx: See h2dring_idx and d2hring_idx
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*/
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/** Offset of a RD or WR index in H2D or D2H indices array */
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#define BCMPCIE_RW_INDEX_OFFSET(rw_index_sz, ring_idx) \
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((rw_index_sz) * (ring_idx))
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/** Fetch the address of RD or WR index in H2D or D2H indices array */
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#define BCMPCIE_RW_INDEX_ADDR(indices_array_base, rw_index_sz, ring_idx) \
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(void *)((uint32)(indices_array_base) + \
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BCMPCIE_RW_INDEX_OFFSET((rw_index_sz), (ring_idx)))
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/** H2D DMA Indices array size: given max flow rings */
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#define BCMPCIE_H2D_RW_INDEX_ARRAY_SZ(rw_index_sz, max_tx_flows) \
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((rw_index_sz) * BCMPCIE_H2D_MSGRINGS(max_tx_flows))
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/** D2H DMA Indices array size */
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#define BCMPCIE_D2H_RW_INDEX_ARRAY_SZ(rw_index_sz) \
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((rw_index_sz) * BCMPCIE_D2H_COMMON_MSGRINGS)
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/**
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* This type is used by a 'message buffer' (which is a FIFO for messages). Message buffers are used
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* for host<->device communication and are instantiated on both sides. ring_mem_t is instantiated
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* both in host as well as device memory.
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*/
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typedef struct ring_mem {
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uint16 idx; /* ring id */
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uint8 type;
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uint8 rsvd;
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uint16 max_item; /* Max number of items in flow ring */
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uint16 len_items; /* Items are fixed size. Length in bytes of one item */
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sh_addr_t base_addr; /* 64 bits address, either in host or device memory */
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} ring_mem_t;
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/**
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* Per flow ring, information is maintained in device memory, e.g. at what address the ringmem and
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* ringstate are located. The flow ring itself can be instantiated in either host or device memory.
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*
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* Perhaps this type should be renamed to make clear that it resides in device memory only.
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*/
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typedef struct ring_info {
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uint32 ringmem_ptr; /* ring mem location in dongle memory */
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/* Following arrays are indexed using h2dring_idx and d2hring_idx, and not
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* by a ringid.
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*/
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/* 32bit ptr to arrays of WR or RD indices for all rings in dongle memory */
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uint32 h2d_w_idx_ptr; /* Array of all H2D ring's WR indices */
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uint32 h2d_r_idx_ptr; /* Array of all H2D ring's RD indices */
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uint32 d2h_w_idx_ptr; /* Array of all D2H ring's WR indices */
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uint32 d2h_r_idx_ptr; /* Array of all D2H ring's RD indices */
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/* PCIE_DMA_INDEX feature: Dongle uses mem2mem DMA to sync arrays in host.
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* Host may directly fetch WR and RD indices from these host-side arrays.
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*
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* 64bit ptr to arrays of WR or RD indices for all rings in host memory.
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*/
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sh_addr_t h2d_w_idx_hostaddr; /* Array of all H2D ring's WR indices */
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sh_addr_t h2d_r_idx_hostaddr; /* Array of all H2D ring's RD indices */
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sh_addr_t d2h_w_idx_hostaddr; /* Array of all D2H ring's WR indices */
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sh_addr_t d2h_r_idx_hostaddr; /* Array of all D2H ring's RD indices */
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uint16 max_sub_queues; /* maximum number of H2D rings: common + flow */
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uint16 rsvd;
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} ring_info_t;
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/**
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* A structure located in TCM that is shared between host and device, primarily used during
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* initialization.
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*/
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typedef struct {
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/** shared area version captured at flags 7:0 */
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uint32 flags;
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uint32 trap_addr;
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uint32 assert_exp_addr;
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uint32 assert_file_addr;
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uint32 assert_line;
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uint32 console_addr; /**< Address of hnd_cons_t */
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uint32 msgtrace_addr;
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uint32 fwid;
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/* Used for debug/flow control */
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uint16 total_lfrag_pkt_cnt;
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uint16 max_host_rxbufs; /* rsvd in spec */
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uint32 dma_rxoffset; /* rsvd in spec */
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/** these will be used for sleep request/ack, d3 req/ack */
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uint32 h2d_mb_data_ptr;
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uint32 d2h_mb_data_ptr;
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/* information pertinent to host IPC/msgbuf channels */
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/** location in the TCM memory which has the ring_info */
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uint32 rings_info_ptr;
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/** block of host memory for the scratch buffer */
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uint32 host_dma_scratch_buffer_len;
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sh_addr_t host_dma_scratch_buffer;
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/** block of host memory for the dongle to push the status into */
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uint32 device_rings_stsblk_len;
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sh_addr_t device_rings_stsblk;
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uint32 buzzz; /* BUZZZ state format strings and trace buffer */
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} pciedev_shared_t;
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extern pciedev_shared_t pciedev_shared;
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/**
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* Mailboxes notify a remote party that an event took place, using interrupts. They use hardware
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* support.
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*/
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/* H2D mail box Data */
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#define H2D_HOST_D3_INFORM 0x00000001
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#define H2D_HOST_DS_ACK 0x00000002
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#define H2D_HOST_DS_NAK 0x00000004
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#define H2D_HOST_CONS_INT 0x80000000 /**< h2d int for console cmds */
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#define H2D_FW_TRAP 0x20000000 /**< dump HW reg info for Livelock issue */
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#define H2D_HOST_D0_INFORM_IN_USE 0x00000008
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#define H2D_HOST_D0_INFORM 0x00000010
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/* D2H mail box Data */
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#define D2H_DEV_D3_ACK 0x00000001
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#define D2H_DEV_DS_ENTER_REQ 0x00000002
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#define D2H_DEV_DS_EXIT_NOTE 0x00000004
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#define D2H_DEV_FWHALT 0x10000000
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#define D2H_DEV_MB_MASK (D2H_DEV_D3_ACK | D2H_DEV_DS_ENTER_REQ | \
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D2H_DEV_DS_EXIT_NOTE | D2H_DEV_FWHALT)
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#define D2H_DEV_MB_INVALIDATED(x) ((!x) || (x & ~D2H_DEV_MB_MASK))
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/** These macro's operate on type 'inuse_lclbuf_pool_t' and are used by firmware only */
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#define NEXTTXP(i, d) ((((i)+1) >= (d)) ? 0 : ((i)+1))
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#define NTXPACTIVE(r, w, d) (((r) <= (w)) ? ((w)-(r)) : ((d)-(r)+(w)))
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#define NTXPAVAIL(r, w, d) (((d) - NTXPACTIVE((r), (w), (d))) > 1)
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/* Function can be used to notify host of FW halt */
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#define READ_AVAIL_SPACE(w, r, d) \
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((w >= r) ? (w - r) : (d - r))
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#define WRITE_SPACE_AVAIL_CONTINUOUS(r, w, d) ((w >= r) ? (d - w) : (r - w))
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#define WRITE_SPACE_AVAIL(r, w, d) (d - (NTXPACTIVE(r, w, d)) - 1)
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#define CHECK_WRITE_SPACE(r, w, d) \
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MIN(WRITE_SPACE_AVAIL(r, w, d), WRITE_SPACE_AVAIL_CONTINUOUS(r, w, d))
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#define WRT_PEND(x) ((x)->wr_pending)
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#define DNGL_RING_WPTR(msgbuf) (*((msgbuf)->tcm_rs_w_ptr))
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#define BCMMSGBUF_RING_SET_W_PTR(msgbuf, a) (DNGL_RING_WPTR(msgbuf) = (a))
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#define DNGL_RING_RPTR(msgbuf) (*((msgbuf)->tcm_rs_r_ptr))
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#define BCMMSGBUF_RING_SET_R_PTR(msgbuf, a) (DNGL_RING_RPTR(msgbuf) = (a))
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#define RING_START_PTR(x) ((x)->ringmem->base_addr.low_addr)
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#define RING_MAX_ITEM(x) ((x)->ringmem->max_item)
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#define RING_LEN_ITEMS(x) ((x)->ringmem->len_items)
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#endif /* _bcmpcie_h_ */
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