diff options
Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_provider.h')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_provider.h | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.h b/drivers/infiniband/hw/mthca/mthca_provider.h new file mode 100644 index 000000000000..0598f3905d9a --- /dev/null +++ b/drivers/infiniband/hw/mthca/mthca_provider.h @@ -0,0 +1,251 @@ +/* + * Copyright (c) 2004 Topspin Communications. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * $Id: mthca_provider.h 1349 2004-12-16 21:09:43Z roland $ + */ + +#ifndef MTHCA_PROVIDER_H +#define MTHCA_PROVIDER_H + +#include <ib_verbs.h> +#include <ib_pack.h> + +#define MTHCA_MPT_FLAG_ATOMIC (1 << 14) +#define MTHCA_MPT_FLAG_REMOTE_WRITE (1 << 13) +#define MTHCA_MPT_FLAG_REMOTE_READ (1 << 12) +#define MTHCA_MPT_FLAG_LOCAL_WRITE (1 << 11) +#define MTHCA_MPT_FLAG_LOCAL_READ (1 << 10) + +struct mthca_buf_list { + void *buf; + DECLARE_PCI_UNMAP_ADDR(mapping) +}; + +struct mthca_uar { + unsigned long pfn; + int index; +}; + +struct mthca_mr { + struct ib_mr ibmr; + int order; + u32 first_seg; +}; + +struct mthca_pd { + struct ib_pd ibpd; + u32 pd_num; + atomic_t sqp_count; + struct mthca_mr ntmr; +}; + +struct mthca_eq { + struct mthca_dev *dev; + int eqn; + u32 eqn_mask; + u32 cons_index; + u16 msi_x_vector; + u16 msi_x_entry; + int have_irq; + int nent; + struct mthca_buf_list *page_list; + struct mthca_mr mr; +}; + +struct mthca_av; + +enum mthca_ah_type { + MTHCA_AH_ON_HCA, + MTHCA_AH_PCI_POOL, + MTHCA_AH_KMALLOC +}; + +struct mthca_ah { + struct ib_ah ibah; + enum mthca_ah_type type; + u32 key; + struct mthca_av *av; + dma_addr_t avdma; +}; + +/* + * Quick description of our CQ/QP locking scheme: + * + * We have one global lock that protects dev->cq/qp_table. Each + * struct mthca_cq/qp also has its own lock. An individual qp lock + * may be taken inside of an individual cq lock. Both cqs attached to + * a qp may be locked, with the send cq locked first. No other + * nesting should be done. + * + * Each struct mthca_cq/qp also has an atomic_t ref count. The + * pointer from the cq/qp_table to the struct counts as one reference. + * This reference also is good for access through the consumer API, so + * modifying the CQ/QP etc doesn't need to take another reference. + * Access because of a completion being polled does need a reference. + * + * Finally, each struct mthca_cq/qp has a wait_queue_head_t for the + * destroy function to sleep on. + * + * This means that access from the consumer API requires nothing but + * taking the struct's lock. + * + * Access because of a completion event should go as follows: + * - lock cq/qp_table and look up struct + * - increment ref count in struct + * - drop cq/qp_table lock + * - lock struct, do your thing, and unlock struct + * - decrement ref count; if zero, wake up waiters + * + * To destroy a CQ/QP, we can do the following: + * - lock cq/qp_table, remove pointer, unlock cq/qp_table lock + * - decrement ref count + * - wait_event until ref count is zero + * + * It is the consumer's responsibilty to make sure that no QP + * operations (WQE posting or state modification) are pending when the + * QP is destroyed. Also, the consumer must make sure that calls to + * qp_modify are serialized. + * + * Possible optimizations (wait for profile data to see if/where we + * have locks bouncing between CPUs): + * - split cq/qp table lock into n separate (cache-aligned) locks, + * indexed (say) by the page in the table + * - split QP struct lock into three (one for common info, one for the + * send queue and one for the receive queue) + */ + +struct mthca_cq { + struct ib_cq ibcq; + spinlock_t lock; + atomic_t refcount; + int cqn; + u32 cons_index; + int is_direct; + + /* Next fields are Arbel only */ + int set_ci_db_index; + u32 *set_ci_db; + int arm_db_index; + u32 *arm_db; + int arm_sn; + + union { + struct mthca_buf_list direct; + struct mthca_buf_list *page_list; + } queue; + struct mthca_mr mr; + wait_queue_head_t wait; +}; + +struct mthca_wq { + spinlock_t lock; + int max; + unsigned next_ind; + unsigned last_comp; + unsigned head; + unsigned tail; + void *last; + int max_gs; + int wqe_shift; + + int db_index; /* Arbel only */ + u32 *db; +}; + +struct mthca_qp { + struct ib_qp ibqp; + atomic_t refcount; + u32 qpn; + int is_direct; + u8 transport; + u8 state; + u8 atomic_rd_en; + u8 resp_depth; + + struct mthca_mr mr; + + struct mthca_wq rq; + struct mthca_wq sq; + enum ib_sig_type sq_policy; + int send_wqe_offset; + + u64 *wrid; + union { + struct mthca_buf_list direct; + struct mthca_buf_list *page_list; + } queue; + + wait_queue_head_t wait; +}; + +struct mthca_sqp { + struct mthca_qp qp; + int port; + int pkey_index; + u32 qkey; + u32 send_psn; + struct ib_ud_header ud_header; + int header_buf_size; + void *header_buf; + dma_addr_t header_dma; +}; + +static inline struct mthca_mr *to_mmr(struct ib_mr *ibmr) +{ + return container_of(ibmr, struct mthca_mr, ibmr); +} + +static inline struct mthca_pd *to_mpd(struct ib_pd *ibpd) +{ + return container_of(ibpd, struct mthca_pd, ibpd); +} + +static inline struct mthca_ah *to_mah(struct ib_ah *ibah) +{ + return container_of(ibah, struct mthca_ah, ibah); +} + +static inline struct mthca_cq *to_mcq(struct ib_cq *ibcq) +{ + return container_of(ibcq, struct mthca_cq, ibcq); +} + +static inline struct mthca_qp *to_mqp(struct ib_qp *ibqp) +{ + return container_of(ibqp, struct mthca_qp, ibqp); +} + +static inline struct mthca_sqp *to_msqp(struct mthca_qp *qp) +{ + return container_of(qp, struct mthca_sqp, qp); +} + +#endif /* MTHCA_PROVIDER_H */ |