mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
dbedd44e98
To test a checkpatch spelling patch, I ran codespell against
drivers/net/ethernet/.
$ git ls-files drivers/net/ethernet/ | \
while read file ; do \
codespell -w $file; \
done
I removed a false positive in e1000_hw.h
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
256 lines
9.3 KiB
C
256 lines
9.3 KiB
C
/****************************************************************************
|
|
* Driver for Solarflare network controllers and boards
|
|
* Copyright 2010-2012 Solarflare Communications Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published
|
|
* by the Free Software Foundation, incorporated herein by reference.
|
|
*/
|
|
#ifndef _VFDI_H
|
|
#define _VFDI_H
|
|
|
|
/**
|
|
* DOC: Virtual Function Driver Interface
|
|
*
|
|
* This file contains software structures used to form a two way
|
|
* communication channel between the VF driver and the PF driver,
|
|
* named Virtual Function Driver Interface (VFDI).
|
|
*
|
|
* For the purposes of VFDI, a page is a memory region with size and
|
|
* alignment of 4K. All addresses are DMA addresses to be used within
|
|
* the domain of the relevant VF.
|
|
*
|
|
* The only hardware-defined channels for a VF driver to communicate
|
|
* with the PF driver are the event mailboxes (%FR_CZ_USR_EV
|
|
* registers). Writing to these registers generates an event with
|
|
* EV_CODE = EV_CODE_USR_EV, USER_QID set to the index of the mailbox
|
|
* and USER_EV_REG_VALUE set to the value written. The PF driver may
|
|
* direct or disable delivery of these events by setting
|
|
* %FR_CZ_USR_EV_CFG.
|
|
*
|
|
* The PF driver can send arbitrary events to arbitrary event queues.
|
|
* However, for consistency, VFDI events from the PF are defined to
|
|
* follow the same form and be sent to the first event queue assigned
|
|
* to the VF while that queue is enabled by the VF driver.
|
|
*
|
|
* The general form of the variable bits of VFDI events is:
|
|
*
|
|
* 0 16 24 31
|
|
* | DATA | TYPE | SEQ |
|
|
*
|
|
* SEQ is a sequence number which should be incremented by 1 (modulo
|
|
* 256) for each event. The sequence numbers used in each direction
|
|
* are independent.
|
|
*
|
|
* The VF submits requests of type &struct vfdi_req by sending the
|
|
* address of the request (ADDR) in a series of 4 events:
|
|
*
|
|
* 0 16 24 31
|
|
* | ADDR[0:15] | VFDI_EV_TYPE_REQ_WORD0 | SEQ |
|
|
* | ADDR[16:31] | VFDI_EV_TYPE_REQ_WORD1 | SEQ+1 |
|
|
* | ADDR[32:47] | VFDI_EV_TYPE_REQ_WORD2 | SEQ+2 |
|
|
* | ADDR[48:63] | VFDI_EV_TYPE_REQ_WORD3 | SEQ+3 |
|
|
*
|
|
* The address must be page-aligned. After receiving such a valid
|
|
* series of events, the PF driver will attempt to read the request
|
|
* and write a response to the same address. In case of an invalid
|
|
* sequence of events or a DMA error, there will be no response.
|
|
*
|
|
* The VF driver may request that the PF driver writes status
|
|
* information into its domain asynchronously. After writing the
|
|
* status, the PF driver will send an event of the form:
|
|
*
|
|
* 0 16 24 31
|
|
* | reserved | VFDI_EV_TYPE_STATUS | SEQ |
|
|
*
|
|
* In case the VF must be reset for any reason, the PF driver will
|
|
* send an event of the form:
|
|
*
|
|
* 0 16 24 31
|
|
* | reserved | VFDI_EV_TYPE_RESET | SEQ |
|
|
*
|
|
* It is then the responsibility of the VF driver to request
|
|
* reinitialisation of its queues.
|
|
*/
|
|
#define VFDI_EV_SEQ_LBN 24
|
|
#define VFDI_EV_SEQ_WIDTH 8
|
|
#define VFDI_EV_TYPE_LBN 16
|
|
#define VFDI_EV_TYPE_WIDTH 8
|
|
#define VFDI_EV_TYPE_REQ_WORD0 0
|
|
#define VFDI_EV_TYPE_REQ_WORD1 1
|
|
#define VFDI_EV_TYPE_REQ_WORD2 2
|
|
#define VFDI_EV_TYPE_REQ_WORD3 3
|
|
#define VFDI_EV_TYPE_STATUS 4
|
|
#define VFDI_EV_TYPE_RESET 5
|
|
#define VFDI_EV_DATA_LBN 0
|
|
#define VFDI_EV_DATA_WIDTH 16
|
|
|
|
struct vfdi_endpoint {
|
|
u8 mac_addr[ETH_ALEN];
|
|
__be16 tci;
|
|
};
|
|
|
|
/**
|
|
* enum vfdi_op - VFDI operation enumeration
|
|
* @VFDI_OP_RESPONSE: Indicates a response to the request.
|
|
* @VFDI_OP_INIT_EVQ: Initialize SRAM entries and initialize an EVQ.
|
|
* @VFDI_OP_INIT_RXQ: Initialize SRAM entries and initialize an RXQ.
|
|
* @VFDI_OP_INIT_TXQ: Initialize SRAM entries and initialize a TXQ.
|
|
* @VFDI_OP_FINI_ALL_QUEUES: Flush all queues, finalize all queues, then
|
|
* finalize the SRAM entries.
|
|
* @VFDI_OP_INSERT_FILTER: Insert a MAC filter targeting the given RXQ.
|
|
* @VFDI_OP_REMOVE_ALL_FILTERS: Remove all filters.
|
|
* @VFDI_OP_SET_STATUS_PAGE: Set the DMA page(s) used for status updates
|
|
* from PF and write the initial status.
|
|
* @VFDI_OP_CLEAR_STATUS_PAGE: Clear the DMA page(s) used for status
|
|
* updates from PF.
|
|
*/
|
|
enum vfdi_op {
|
|
VFDI_OP_RESPONSE = 0,
|
|
VFDI_OP_INIT_EVQ = 1,
|
|
VFDI_OP_INIT_RXQ = 2,
|
|
VFDI_OP_INIT_TXQ = 3,
|
|
VFDI_OP_FINI_ALL_QUEUES = 4,
|
|
VFDI_OP_INSERT_FILTER = 5,
|
|
VFDI_OP_REMOVE_ALL_FILTERS = 6,
|
|
VFDI_OP_SET_STATUS_PAGE = 7,
|
|
VFDI_OP_CLEAR_STATUS_PAGE = 8,
|
|
VFDI_OP_LIMIT,
|
|
};
|
|
|
|
/* Response codes for VFDI operations. Other values may be used in future. */
|
|
#define VFDI_RC_SUCCESS 0
|
|
#define VFDI_RC_ENOMEM (-12)
|
|
#define VFDI_RC_EINVAL (-22)
|
|
#define VFDI_RC_EOPNOTSUPP (-95)
|
|
#define VFDI_RC_ETIMEDOUT (-110)
|
|
|
|
/**
|
|
* struct vfdi_req - Request from VF driver to PF driver
|
|
* @op: Operation code or response indicator, taken from &enum vfdi_op.
|
|
* @rc: Response code. Set to 0 on success or a negative error code on failure.
|
|
* @u.init_evq.index: Index of event queue to create.
|
|
* @u.init_evq.buf_count: Number of 4k buffers backing event queue.
|
|
* @u.init_evq.addr: Array of length %u.init_evq.buf_count containing DMA
|
|
* address of each page backing the event queue.
|
|
* @u.init_rxq.index: Index of receive queue to create.
|
|
* @u.init_rxq.buf_count: Number of 4k buffers backing receive queue.
|
|
* @u.init_rxq.evq: Instance of event queue to target receive events at.
|
|
* @u.init_rxq.label: Label used in receive events.
|
|
* @u.init_rxq.flags: Unused.
|
|
* @u.init_rxq.addr: Array of length %u.init_rxq.buf_count containing DMA
|
|
* address of each page backing the receive queue.
|
|
* @u.init_txq.index: Index of transmit queue to create.
|
|
* @u.init_txq.buf_count: Number of 4k buffers backing transmit queue.
|
|
* @u.init_txq.evq: Instance of event queue to target transmit completion
|
|
* events at.
|
|
* @u.init_txq.label: Label used in transmit completion events.
|
|
* @u.init_txq.flags: Checksum offload flags.
|
|
* @u.init_txq.addr: Array of length %u.init_txq.buf_count containing DMA
|
|
* address of each page backing the transmit queue.
|
|
* @u.mac_filter.rxq: Insert MAC filter at VF local address/VLAN targeting
|
|
* all traffic at this receive queue.
|
|
* @u.mac_filter.flags: MAC filter flags.
|
|
* @u.set_status_page.dma_addr: Base address for the &struct vfdi_status.
|
|
* This address must be page-aligned and the PF may write up to a
|
|
* whole page (allowing for extension of the structure).
|
|
* @u.set_status_page.peer_page_count: Number of additional pages the VF
|
|
* has provided into which peer addresses may be DMAd.
|
|
* @u.set_status_page.peer_page_addr: Array of DMA addresses of pages.
|
|
* If the number of peers exceeds 256, then the VF must provide
|
|
* additional pages in this array. The PF will then DMA up to
|
|
* 512 vfdi_endpoint structures into each page. These addresses
|
|
* must be page-aligned.
|
|
*/
|
|
struct vfdi_req {
|
|
u32 op;
|
|
u32 reserved1;
|
|
s32 rc;
|
|
u32 reserved2;
|
|
union {
|
|
struct {
|
|
u32 index;
|
|
u32 buf_count;
|
|
u64 addr[];
|
|
} init_evq;
|
|
struct {
|
|
u32 index;
|
|
u32 buf_count;
|
|
u32 evq;
|
|
u32 label;
|
|
u32 flags;
|
|
#define VFDI_RXQ_FLAG_SCATTER_EN 1
|
|
u32 reserved;
|
|
u64 addr[];
|
|
} init_rxq;
|
|
struct {
|
|
u32 index;
|
|
u32 buf_count;
|
|
u32 evq;
|
|
u32 label;
|
|
u32 flags;
|
|
#define VFDI_TXQ_FLAG_IP_CSUM_DIS 1
|
|
#define VFDI_TXQ_FLAG_TCPUDP_CSUM_DIS 2
|
|
u32 reserved;
|
|
u64 addr[];
|
|
} init_txq;
|
|
struct {
|
|
u32 rxq;
|
|
u32 flags;
|
|
#define VFDI_MAC_FILTER_FLAG_RSS 1
|
|
#define VFDI_MAC_FILTER_FLAG_SCATTER 2
|
|
} mac_filter;
|
|
struct {
|
|
u64 dma_addr;
|
|
u64 peer_page_count;
|
|
u64 peer_page_addr[];
|
|
} set_status_page;
|
|
} u;
|
|
};
|
|
|
|
/**
|
|
* struct vfdi_status - Status provided by PF driver to VF driver
|
|
* @generation_start: A generation count DMA'd to VF *before* the
|
|
* rest of the structure.
|
|
* @generation_end: A generation count DMA'd to VF *after* the
|
|
* rest of the structure.
|
|
* @version: Version of this structure; currently set to 1. Later
|
|
* versions must either be layout-compatible or only be sent to VFs
|
|
* that specifically request them.
|
|
* @length: Total length of this structure including embedded tables
|
|
* @vi_scale: log2 the number of VIs available on this VF. This quantity
|
|
* is used by the hardware for register decoding.
|
|
* @max_tx_channels: The maximum number of transmit queues the VF can use.
|
|
* @rss_rxq_count: The number of receive queues present in the shared RSS
|
|
* indirection table.
|
|
* @peer_count: Total number of peers in the complete peer list. If larger
|
|
* than ARRAY_SIZE(%peers), then the VF must provide sufficient
|
|
* additional pages each of which is filled with vfdi_endpoint structures.
|
|
* @local: The MAC address and outer VLAN tag of *this* VF
|
|
* @peers: Table of peer addresses. The @tci fields in these structures
|
|
* are currently unused and must be ignored. Additional peers are
|
|
* written into any additional pages provided by the VF.
|
|
* @timer_quantum_ns: Timer quantum (nominal period between timer ticks)
|
|
* for interrupt moderation timers, in nanoseconds. This member is only
|
|
* present if @length is sufficiently large.
|
|
*/
|
|
struct vfdi_status {
|
|
u32 generation_start;
|
|
u32 generation_end;
|
|
u32 version;
|
|
u32 length;
|
|
u8 vi_scale;
|
|
u8 max_tx_channels;
|
|
u8 rss_rxq_count;
|
|
u8 reserved1;
|
|
u16 peer_count;
|
|
u16 reserved2;
|
|
struct vfdi_endpoint local;
|
|
struct vfdi_endpoint peers[256];
|
|
|
|
/* Members below here extend version 1 of this structure */
|
|
u32 timer_quantum_ns;
|
|
};
|
|
|
|
#endif
|