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