--- /dev/null
+/*
+ * Copyright (c) 2004 Topspin Communications. All rights reserved.
+ * Copyright (c) 2005, 2006 Cisco Systems. All rights reserved.
+ * Copyright (c) 2005 Mellanox Technologies. 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.
+ */
+
+#ifndef MTHCA_PROVIDER_H
+#define MTHCA_PROVIDER_H
+
+#include <rdma/ib_verbs.h>
+#include <rdma/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;
+ DEFINE_DMA_UNMAP_ADDR(mapping);
+};
+
+union mthca_buf {
+ struct mthca_buf_list direct;
+ struct mthca_buf_list *page_list;
+};
+
+struct mthca_uar {
+ unsigned long pfn;
+ int index;
+};
+
+struct mthca_user_db_table;
+
+struct mthca_ucontext {
+ struct ib_ucontext ibucontext;
+ struct mthca_uar uar;
+ struct mthca_user_db_table *db_tab;
+ int reg_mr_warned;
+};
+
+struct mthca_mtt;
+
+struct mthca_mr {
+ struct ib_mr ibmr;
+ struct ib_umem *umem;
+ struct mthca_mtt *mtt;
+};
+
+struct mthca_fmr {
+ struct ib_fmr ibmr;
+ struct ib_fmr_attr attr;
+ struct mthca_mtt *mtt;
+ int maps;
+ union {
+ struct {
+ struct mthca_mpt_entry __iomem *mpt;
+ u64 __iomem *mtts;
+ } tavor;
+ struct {
+ struct mthca_mpt_entry *mpt;
+ __be64 *mtts;
+ dma_addr_t dma_handle;
+ } arbel;
+ } mem;
+};
+
+struct mthca_pd {
+ struct ib_pd ibpd;
+ u32 pd_num;
+ atomic_t sqp_count;
+ struct mthca_mr ntmr;
+ int privileged;
+};
+
+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;
+ char irq_name[IB_DEVICE_NAME_MAX];
+};
+
+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 cq with the lower cqn locked first.
+ * No other nesting should be done.
+ *
+ * Each struct mthca_cq/qp also has an ref count, protected by the
+ * corresponding table lock. 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 to a QP because of a
+ * completion being polled does not need a reference either.
+ *
+ * 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 and decrement ref count
+ * - unlock cq/qp_table lock
+ * - 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 a
+ * QP is destroyed. Also, the consumer must make sure that calls to
+ * qp_modify are serialized. Similarly, the consumer is responsible
+ * for ensuring that no CQ resize operations are pending when a CQ
+ * is destroyed.
+ *
+ * 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_buf {
+ union mthca_buf queue;
+ struct mthca_mr mr;
+ int is_direct;
+};
+
+struct mthca_cq_resize {
+ struct mthca_cq_buf buf;
+ int cqe;
+ enum {
+ CQ_RESIZE_ALLOC,
+ CQ_RESIZE_READY,
+ CQ_RESIZE_SWAPPED
+ } state;
+};
+
+struct mthca_cq {
+ struct ib_cq ibcq;
+ spinlock_t lock;
+ int refcount;
+ int cqn;
+ u32 cons_index;
+ struct mthca_cq_buf buf;
+ struct mthca_cq_resize *resize_buf;
+ int is_kernel;
+
+ /* Next fields are Arbel only */
+ int set_ci_db_index;
+ __be32 *set_ci_db;
+ int arm_db_index;
+ __be32 *arm_db;
+ int arm_sn;
+
+ wait_queue_head_t wait;
+ struct mutex mutex;
+};
+
+struct mthca_srq {
+ struct ib_srq ibsrq;
+ spinlock_t lock;
+ int refcount;
+ int srqn;
+ int max;
+ int max_gs;
+ int wqe_shift;
+ int first_free;
+ int last_free;
+ u16 counter; /* Arbel only */
+ int db_index; /* Arbel only */
+ __be32 *db; /* Arbel only */
+ void *last;
+
+ int is_direct;
+ u64 *wrid;
+ union mthca_buf queue;
+ struct mthca_mr mr;
+
+ wait_queue_head_t wait;
+ struct mutex mutex;
+};
+
+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 */
+ __be32 *db;
+};
+
+struct mthca_qp {
+ struct ib_qp ibqp;
+ int refcount;
+ u32 qpn;
+ int is_direct;
+ u8 port; /* for SQP and memfree use only */
+ u8 alt_port; /* for memfree use only */
+ 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;
+ int max_inline_data;
+
+ u64 *wrid;
+ union mthca_buf queue;
+
+ wait_queue_head_t wait;
+ struct mutex mutex;
+};
+
+struct mthca_sqp {
+ struct mthca_qp qp;
+ 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_ucontext *to_mucontext(struct ib_ucontext *ibucontext)
+{
+ return container_of(ibucontext, struct mthca_ucontext, ibucontext);
+}
+
+static inline struct mthca_fmr *to_mfmr(struct ib_fmr *ibmr)
+{
+ return container_of(ibmr, struct mthca_fmr, ibmr);
+}
+
+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_srq *to_msrq(struct ib_srq *ibsrq)
+{
+ return container_of(ibsrq, struct mthca_srq, ibsrq);
+}
+
+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 */
Code Review / kvmfornfv.git / blobdiff