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Since the network driver and RDMA driver operate on the same PCI function, we need to create an interface to allow the RDMA driver to share resources with the network driver. 1. Create a new bnxt_en_dev struct which will be returned by bnxt_ulp_probe() upon success. After that, all calls from the RDMA driver to bnxt_en will pass a pointer to this struct. 2. This struct contains additional function pointers to register, request msix, send fw messages, register for async events. 3. If the RDMA driver wants to enable RDMA on the function, it needs to call the function pointer bnxt_register_device(). A ulp_ops structure is passed for RCU protected upcalls from bnxt_en to the RDMA driver. 4. The RDMA driver can call firmware APIs using the bnxt_send_fw_msg() function pointer. 5. 1 stats context is reserved when the RDMA driver registers. MSIX and completion rings are reserved when the RDMA driver calls bnxt_request_msix() function pointer. 6. When the RDMA driver calls bnxt_unregister_device(), all RDMA resources will be cleaned up. v2: Fixed 2 uninitialized variable warnings. Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com> Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/* Broadcom NetXtreme-C/E network driver.
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*
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* Copyright (c) 2016 Broadcom Limited
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation.
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*/
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#ifndef BNXT_ULP_H
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#define BNXT_ULP_H
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#define BNXT_ROCE_ULP 0
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#define BNXT_OTHER_ULP 1
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#define BNXT_MAX_ULP 2
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#define BNXT_MIN_ROCE_CP_RINGS 2
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#define BNXT_MIN_ROCE_STAT_CTXS 1
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struct hwrm_async_event_cmpl;
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struct bnxt;
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struct bnxt_ulp_ops {
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/* async_notifier() cannot sleep (in BH context) */
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void (*ulp_async_notifier)(void *, struct hwrm_async_event_cmpl *);
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void (*ulp_stop)(void *);
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void (*ulp_start)(void *);
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void (*ulp_sriov_config)(void *, int);
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};
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struct bnxt_msix_entry {
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u32 vector;
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u32 ring_idx;
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u32 db_offset;
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};
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struct bnxt_fw_msg {
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void *msg;
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int msg_len;
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void *resp;
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int resp_max_len;
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int timeout;
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};
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struct bnxt_ulp {
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void *handle;
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struct bnxt_ulp_ops __rcu *ulp_ops;
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unsigned long *async_events_bmap;
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u16 max_async_event_id;
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u16 msix_requested;
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atomic_t ref_count;
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};
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struct bnxt_en_dev {
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struct net_device *net;
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struct pci_dev *pdev;
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u32 flags;
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#define BNXT_EN_FLAG_ROCEV1_CAP 0x1
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#define BNXT_EN_FLAG_ROCEV2_CAP 0x2
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#define BNXT_EN_FLAG_ROCE_CAP (BNXT_EN_FLAG_ROCEV1_CAP | \
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BNXT_EN_FLAG_ROCEV2_CAP)
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const struct bnxt_en_ops *en_ops;
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struct bnxt_ulp ulp_tbl[BNXT_MAX_ULP];
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};
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struct bnxt_en_ops {
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int (*bnxt_register_device)(struct bnxt_en_dev *, int,
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struct bnxt_ulp_ops *, void *);
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int (*bnxt_unregister_device)(struct bnxt_en_dev *, int);
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int (*bnxt_request_msix)(struct bnxt_en_dev *, int,
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struct bnxt_msix_entry *, int);
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int (*bnxt_free_msix)(struct bnxt_en_dev *, int);
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int (*bnxt_send_fw_msg)(struct bnxt_en_dev *, int,
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struct bnxt_fw_msg *);
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int (*bnxt_register_fw_async_events)(struct bnxt_en_dev *, int,
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unsigned long *, u16);
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};
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static inline bool bnxt_ulp_registered(struct bnxt_en_dev *edev, int ulp_id)
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{
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if (edev && rcu_access_pointer(edev->ulp_tbl[ulp_id].ulp_ops))
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return true;
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return false;
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}
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void bnxt_subtract_ulp_resources(struct bnxt *bp, int ulp_id);
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void bnxt_ulp_stop(struct bnxt *bp);
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void bnxt_ulp_start(struct bnxt *bp);
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void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs);
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void bnxt_ulp_async_events(struct bnxt *bp, struct hwrm_async_event_cmpl *cmpl);
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struct bnxt_en_dev *bnxt_ulp_probe(struct net_device *dev);
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#endif
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