diff options
Diffstat (limited to 'drivers/infiniband/hw/hfi1/user_sdma.h')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/user_sdma.h | 169 |
1 files changed, 166 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/hfi1/user_sdma.h b/drivers/infiniband/hw/hfi1/user_sdma.h index e5b10aefe212..9b8bb5634c0d 100644 --- a/drivers/infiniband/hw/hfi1/user_sdma.h +++ b/drivers/infiniband/hw/hfi1/user_sdma.h @@ -53,11 +53,68 @@ #include "iowait.h" #include "user_exp_rcv.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) + +#define AHG_HEADER_SET(arr, idx, dw, bit, width, value) \ + do { \ + if ((idx) < ARRAY_SIZE((arr))) \ + (arr)[(idx++)] = sdma_build_ahg_descriptor( \ + (__force u16)(value), (dw), (bit), \ + (width)); \ + else \ + return -ERANGE; \ + } while (0) + +/* 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 */ + +#define SDMA_PKT_Q_INACTIVE BIT(0) +#define SDMA_PKT_Q_ACTIVE BIT(1) +#define SDMA_PKT_Q_DEFERRED BIT(2) + +/* + * Maximum retry attempts to submit a TX request + * before putting the process to sleep. + */ +#define MAX_DEFER_RETRY_COUNT 1 + +#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__) + extern uint extended_psn; struct hfi1_user_sdma_pkt_q { - struct list_head list; - unsigned ctxt; + u16 ctxt; u16 subctxt; u16 n_max_reqs; atomic_t n_reqs; @@ -80,9 +137,115 @@ struct hfi1_user_sdma_comp_q { 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 */ + u64 seqcomp ____cacheline_aligned_in_smp; + u64 seqsubmitted; + /* status of the last txreq completed */ + int status; + + /* Send side fields */ + struct list_head txps ____cacheline_aligned_in_smp; + u64 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 done; + 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; + unsigned int busycount; + u64 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); +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); |