mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 01:41:39 +00:00
![Cai Huoqing](/assets/img/avatar_default.png)
use SPDX-License-Identifier instead of a verbose license text Link: https://lore.kernel.org/r/20210823042622.109-1-caihuoqing@baidu.com Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
218 lines
5.9 KiB
C
218 lines
5.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
|
|
/*
|
|
* Copyright(c) 2020 - Cornelis Networks, Inc.
|
|
* Copyright(c) 2015 - 2018 Intel Corporation.
|
|
*/
|
|
#ifndef _HFI1_USER_SDMA_H
|
|
#define _HFI1_USER_SDMA_H
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/wait.h>
|
|
|
|
#include "common.h"
|
|
#include "iowait.h"
|
|
#include "user_exp_rcv.h"
|
|
#include "mmu_rb.h"
|
|
|
|
/* The maximum number of Data io vectors per message/request */
|
|
#define MAX_VECTORS_PER_REQ 8
|
|
/*
|
|
* Maximum number of packet to send from each message/request
|
|
* before moving to the next one.
|
|
*/
|
|
#define MAX_PKTS_PER_QUEUE 16
|
|
|
|
#define num_pages(x) (1 + ((((x) - 1) & PAGE_MASK) >> PAGE_SHIFT))
|
|
|
|
#define req_opcode(x) \
|
|
(((x) >> HFI1_SDMA_REQ_OPCODE_SHIFT) & HFI1_SDMA_REQ_OPCODE_MASK)
|
|
#define req_version(x) \
|
|
(((x) >> HFI1_SDMA_REQ_VERSION_SHIFT) & HFI1_SDMA_REQ_OPCODE_MASK)
|
|
#define req_iovcnt(x) \
|
|
(((x) >> HFI1_SDMA_REQ_IOVCNT_SHIFT) & HFI1_SDMA_REQ_IOVCNT_MASK)
|
|
|
|
/* Number of BTH.PSN bits used for sequence number in expected rcvs */
|
|
#define BTH_SEQ_MASK 0x7ffull
|
|
|
|
#define AHG_KDETH_INTR_SHIFT 12
|
|
#define AHG_KDETH_SH_SHIFT 13
|
|
#define AHG_KDETH_ARRAY_SIZE 9
|
|
|
|
#define PBC2LRH(x) ((((x) & 0xfff) << 2) - 4)
|
|
#define LRH2PBC(x) ((((x) >> 2) + 1) & 0xfff)
|
|
|
|
/**
|
|
* Build an SDMA AHG header update descriptor and save it to an array.
|
|
* @arr - Array to save the descriptor to.
|
|
* @idx - Index of the array at which the descriptor will be saved.
|
|
* @array_size - Size of the array arr.
|
|
* @dw - Update index into the header in DWs.
|
|
* @bit - Start bit.
|
|
* @width - Field width.
|
|
* @value - 16 bits of immediate data to write into the field.
|
|
* Returns -ERANGE if idx is invalid. If successful, returns the next index
|
|
* (idx + 1) of the array to be used for the next descriptor.
|
|
*/
|
|
static inline int ahg_header_set(u32 *arr, int idx, size_t array_size,
|
|
u8 dw, u8 bit, u8 width, u16 value)
|
|
{
|
|
if ((size_t)idx >= array_size)
|
|
return -ERANGE;
|
|
arr[idx++] = sdma_build_ahg_descriptor(value, dw, bit, width);
|
|
return idx;
|
|
}
|
|
|
|
/* Tx request flag bits */
|
|
#define TXREQ_FLAGS_REQ_ACK BIT(0) /* Set the ACK bit in the header */
|
|
#define TXREQ_FLAGS_REQ_DISABLE_SH BIT(1) /* Disable header suppression */
|
|
|
|
enum pkt_q_sdma_state {
|
|
SDMA_PKT_Q_ACTIVE,
|
|
SDMA_PKT_Q_DEFERRED,
|
|
};
|
|
|
|
#define SDMA_IOWAIT_TIMEOUT 1000 /* in milliseconds */
|
|
|
|
#define SDMA_DBG(req, fmt, ...) \
|
|
hfi1_cdbg(SDMA, "[%u:%u:%u:%u] " fmt, (req)->pq->dd->unit, \
|
|
(req)->pq->ctxt, (req)->pq->subctxt, (req)->info.comp_idx, \
|
|
##__VA_ARGS__)
|
|
|
|
struct hfi1_user_sdma_pkt_q {
|
|
u16 ctxt;
|
|
u16 subctxt;
|
|
u16 n_max_reqs;
|
|
atomic_t n_reqs;
|
|
u16 reqidx;
|
|
struct hfi1_devdata *dd;
|
|
struct kmem_cache *txreq_cache;
|
|
struct user_sdma_request *reqs;
|
|
unsigned long *req_in_use;
|
|
struct iowait busy;
|
|
enum pkt_q_sdma_state state;
|
|
wait_queue_head_t wait;
|
|
unsigned long unpinned;
|
|
struct mmu_rb_handler *handler;
|
|
atomic_t n_locked;
|
|
};
|
|
|
|
struct hfi1_user_sdma_comp_q {
|
|
u16 nentries;
|
|
struct hfi1_sdma_comp_entry *comps;
|
|
};
|
|
|
|
struct sdma_mmu_node {
|
|
struct mmu_rb_node rb;
|
|
struct hfi1_user_sdma_pkt_q *pq;
|
|
atomic_t refcount;
|
|
struct page **pages;
|
|
unsigned int npages;
|
|
};
|
|
|
|
struct user_sdma_iovec {
|
|
struct list_head list;
|
|
struct iovec iov;
|
|
/* number of pages in this vector */
|
|
unsigned int npages;
|
|
/* array of pinned pages for this vector */
|
|
struct page **pages;
|
|
/*
|
|
* offset into the virtual address space of the vector at
|
|
* which we last left off.
|
|
*/
|
|
u64 offset;
|
|
struct sdma_mmu_node *node;
|
|
};
|
|
|
|
/* evict operation argument */
|
|
struct evict_data {
|
|
u32 cleared; /* count evicted so far */
|
|
u32 target; /* target count to evict */
|
|
};
|
|
|
|
struct user_sdma_request {
|
|
/* This is the original header from user space */
|
|
struct hfi1_pkt_header hdr;
|
|
|
|
/* Read mostly fields */
|
|
struct hfi1_user_sdma_pkt_q *pq ____cacheline_aligned_in_smp;
|
|
struct hfi1_user_sdma_comp_q *cq;
|
|
/*
|
|
* Pointer to the SDMA engine for this request.
|
|
* Since different request could be on different VLs,
|
|
* each request will need it's own engine pointer.
|
|
*/
|
|
struct sdma_engine *sde;
|
|
struct sdma_req_info info;
|
|
/* TID array values copied from the tid_iov vector */
|
|
u32 *tids;
|
|
/* total length of the data in the request */
|
|
u32 data_len;
|
|
/* number of elements copied to the tids array */
|
|
u16 n_tids;
|
|
/*
|
|
* We copy the iovs for this request (based on
|
|
* info.iovcnt). These are only the data vectors
|
|
*/
|
|
u8 data_iovs;
|
|
s8 ahg_idx;
|
|
|
|
/* Writeable fields shared with interrupt */
|
|
u16 seqcomp ____cacheline_aligned_in_smp;
|
|
u16 seqsubmitted;
|
|
|
|
/* Send side fields */
|
|
struct list_head txps ____cacheline_aligned_in_smp;
|
|
u16 seqnum;
|
|
/*
|
|
* KDETH.OFFSET (TID) field
|
|
* The offset can cover multiple packets, depending on the
|
|
* size of the TID entry.
|
|
*/
|
|
u32 tidoffset;
|
|
/*
|
|
* KDETH.Offset (Eager) field
|
|
* We need to remember the initial value so the headers
|
|
* can be updated properly.
|
|
*/
|
|
u32 koffset;
|
|
u32 sent;
|
|
/* TID index copied from the tid_iov vector */
|
|
u16 tididx;
|
|
/* progress index moving along the iovs array */
|
|
u8 iov_idx;
|
|
u8 has_error;
|
|
|
|
struct user_sdma_iovec iovs[MAX_VECTORS_PER_REQ];
|
|
} ____cacheline_aligned_in_smp;
|
|
|
|
/*
|
|
* A single txreq could span up to 3 physical pages when the MTU
|
|
* is sufficiently large (> 4K). Each of the IOV pointers also
|
|
* needs it's own set of flags so the vector has been handled
|
|
* independently of each other.
|
|
*/
|
|
struct user_sdma_txreq {
|
|
/* Packet header for the txreq */
|
|
struct hfi1_pkt_header hdr;
|
|
struct sdma_txreq txreq;
|
|
struct list_head list;
|
|
struct user_sdma_request *req;
|
|
u16 flags;
|
|
u16 seqnum;
|
|
};
|
|
|
|
int hfi1_user_sdma_alloc_queues(struct hfi1_ctxtdata *uctxt,
|
|
struct hfi1_filedata *fd);
|
|
int hfi1_user_sdma_free_queues(struct hfi1_filedata *fd,
|
|
struct hfi1_ctxtdata *uctxt);
|
|
int hfi1_user_sdma_process_request(struct hfi1_filedata *fd,
|
|
struct iovec *iovec, unsigned long dim,
|
|
unsigned long *count);
|
|
|
|
static inline struct mm_struct *mm_from_sdma_node(struct sdma_mmu_node *node)
|
|
{
|
|
return node->rb.handler->mn.mm;
|
|
}
|
|
|
|
#endif /* _HFI1_USER_SDMA_H */
|