RDMA/irdma: Add privileged UDA queue implementation

Implement privileged UDA queues to handle iWARP connection
packets and receive exceptions.

Link: https://lore.kernel.org/r/20210602205138.889-6-shiraz.saleem@intel.comSigned-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/irdma/puda.h

+/* SPDX-License-Identifier: GPL-2.0 or Linux-OpenIB */
+/* Copyright (c) 2015 - 2020 Intel Corporation */
+#ifndef IRDMA_PUDA_H
+#define IRDMA_PUDA_H
+
+#define IRDMA_IEQ_MPA_FRAMING	6
+#define IRDMA_TCP_OFFSET	40
+#define IRDMA_IPV4_PAD		20
+#define IRDMA_MRK_BLK_SZ	512
+
+enum puda_rsrc_type {
+	IRDMA_PUDA_RSRC_TYPE_ILQ = 1,
+	IRDMA_PUDA_RSRC_TYPE_IEQ,
+	IRDMA_PUDA_RSRC_TYPE_MAX, /* Must be last entry */
+};
+
+enum puda_rsrc_complete {
+	PUDA_CQ_CREATED = 1,
+	PUDA_QP_CREATED,
+	PUDA_TX_COMPLETE,
+	PUDA_RX_COMPLETE,
+	PUDA_HASH_CRC_COMPLETE,
+};
+
+struct irdma_sc_dev;
+struct irdma_sc_qp;
+struct irdma_sc_cq;
+
+struct irdma_puda_cmpl_info {
+	struct irdma_qp_uk *qp;
+	u8 q_type;
+	u8 l3proto;
+	u8 l4proto;
+	u16 vlan;
+	u32 payload_len;
+	u32 compl_error; /* No_err=0, else major and minor err code */
+	u32 qp_id;
+	u32 wqe_idx;
+	bool ipv4:1;
+	bool smac_valid:1;
+	bool vlan_valid:1;
+	u8 smac[ETH_ALEN];
+};
+
+struct irdma_puda_send_info {
+	u64 paddr; /* Physical address */
+	u32 len;
+	u32 ah_id;
+	u8 tcplen;
+	u8 maclen;
+	bool ipv4:1;
+	bool do_lpb:1;
+	void *scratch;
+};
+
+struct irdma_puda_buf {
+	struct list_head list; /* MUST be first entry */
+	struct irdma_dma_mem mem; /* DMA memory for the buffer */
+	struct irdma_puda_buf *next; /* for alloclist in rsrc struct */
+	struct irdma_virt_mem buf_mem; /* Buffer memory for this buffer */
+	void *scratch;
+	u8 *iph;
+	u8 *tcph;
+	u8 *data;
+	u16 datalen;
+	u16 vlan_id;
+	u8 tcphlen; /* tcp length in bytes */
+	u8 maclen; /* mac length in bytes */
+	u32 totallen; /* machlen+iphlen+tcphlen+datalen */
+	refcount_t refcount;
+	u8 hdrlen;
+	bool ipv4:1;
+	bool vlan_valid:1;
+	bool do_lpb:1; /* Loopback buffer */
+	bool smac_valid:1;
+	u32 seqnum;
+	u32 ah_id;
+	u8 smac[ETH_ALEN];
+	struct irdma_sc_vsi *vsi;
+};
+
+struct irdma_puda_rsrc_info {
+	void (*receive)(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *buf);
+	void (*xmit_complete)(struct irdma_sc_vsi *vsi, void *sqwrid);
+	enum puda_rsrc_type type; /* ILQ or IEQ */
+	u32 count;
+	u32 pd_id;
+	u32 cq_id;
+	u32 qp_id;
+	u32 sq_size;
+	u32 rq_size;
+	u32 tx_buf_cnt; /* total bufs allocated will be rq_size + tx_buf_cnt */
+	u16 buf_size;
+	u8 stats_idx;
+	bool stats_idx_valid:1;
+	int abi_ver;
+};
+
+struct irdma_puda_rsrc {
+	struct irdma_sc_cq cq;
+	struct irdma_sc_qp qp;
+	struct irdma_sc_pd sc_pd;
+	struct irdma_sc_dev *dev;
+	struct irdma_sc_vsi *vsi;
+	struct irdma_dma_mem cqmem;
+	struct irdma_dma_mem qpmem;
+	struct irdma_virt_mem ilq_mem;
+	enum puda_rsrc_complete cmpl;
+	enum puda_rsrc_type type;
+	u16 buf_size; /*buf must be max datalen + tcpip hdr + mac */
+	u32 cq_id;
+	u32 qp_id;
+	u32 sq_size;
+	u32 rq_size;
+	u32 cq_size;
+	struct irdma_sq_uk_wr_trk_info *sq_wrtrk_array;
+	u64 *rq_wrid_array;
+	u32 compl_rxwqe_idx;
+	u32 rx_wqe_idx;
+	u32 rxq_invalid_cnt;
+	u32 tx_wqe_avail_cnt;
+	struct shash_desc *hash_desc;
+	struct list_head txpend;
+	struct list_head bufpool; /* free buffers pool list for recv and xmit */
+	u32 alloc_buf_count;
+	u32 avail_buf_count; /* snapshot of currently available buffers */
+	spinlock_t bufpool_lock;
+	struct irdma_puda_buf *alloclist;
+	void (*receive)(struct irdma_sc_vsi *vsi, struct irdma_puda_buf *buf);
+	void (*xmit_complete)(struct irdma_sc_vsi *vsi, void *sqwrid);
+	/* puda stats */
+	u64 stats_buf_alloc_fail;
+	u64 stats_pkt_rcvd;
+	u64 stats_pkt_sent;
+	u64 stats_rcvd_pkt_err;
+	u64 stats_sent_pkt_q;
+	u64 stats_bad_qp_id;
+	/* IEQ stats */
+	u64 fpdu_processed;
+	u64 bad_seq_num;
+	u64 crc_err;
+	u64 pmode_count;
+	u64 partials_handled;
+	u8 stats_idx;
+	bool check_crc:1;
+	bool stats_idx_valid:1;
+};
+
+struct irdma_puda_buf *irdma_puda_get_bufpool(struct irdma_puda_rsrc *rsrc);
+void irdma_puda_ret_bufpool(struct irdma_puda_rsrc *rsrc,
+			    struct irdma_puda_buf *buf);
+void irdma_puda_send_buf(struct irdma_puda_rsrc *rsrc,
+			 struct irdma_puda_buf *buf);
+enum irdma_status_code irdma_puda_send(struct irdma_sc_qp *qp,
+				       struct irdma_puda_send_info *info);
+enum irdma_status_code
+irdma_puda_create_rsrc(struct irdma_sc_vsi *vsi,
+		       struct irdma_puda_rsrc_info *info);
+void irdma_puda_dele_rsrc(struct irdma_sc_vsi *vsi, enum puda_rsrc_type type,
+			  bool reset);
+enum irdma_status_code irdma_puda_poll_cmpl(struct irdma_sc_dev *dev,
+					    struct irdma_sc_cq *cq,
+					    u32 *compl_err);
+
+struct irdma_sc_qp *irdma_ieq_get_qp(struct irdma_sc_dev *dev,
+				     struct irdma_puda_buf *buf);
+enum irdma_status_code
+irdma_puda_get_tcpip_info(struct irdma_puda_cmpl_info *info,
+			  struct irdma_puda_buf *buf);
+enum irdma_status_code irdma_ieq_check_mpacrc(struct shash_desc *desc,
+					      void *addr, u32 len, u32 val);
+enum irdma_status_code irdma_init_hash_desc(struct shash_desc **desc);
+void irdma_ieq_mpa_crc_ae(struct irdma_sc_dev *dev, struct irdma_sc_qp *qp);
+void irdma_free_hash_desc(struct shash_desc *desc);
+void irdma_ieq_update_tcpip_info(struct irdma_puda_buf *buf, u16 len,
+				 u32 seqnum);
+enum irdma_status_code irdma_cqp_qp_create_cmd(struct irdma_sc_dev *dev,
+					       struct irdma_sc_qp *qp);
+enum irdma_status_code irdma_cqp_cq_create_cmd(struct irdma_sc_dev *dev,
+					       struct irdma_sc_cq *cq);
+enum irdma_status_code irdma_cqp_qp_destroy_cmd(struct irdma_sc_dev *dev, struct irdma_sc_qp *qp);
+void irdma_cqp_cq_destroy_cmd(struct irdma_sc_dev *dev, struct irdma_sc_cq *cq);
+void irdma_puda_ieq_get_ah_info(struct irdma_sc_qp *qp,
+				struct irdma_ah_info *ah_info);
+enum irdma_status_code irdma_puda_create_ah(struct irdma_sc_dev *dev,
+					    struct irdma_ah_info *ah_info,
+					    bool wait, enum puda_rsrc_type type,
+					    void *cb_param,
+					    struct irdma_sc_ah **ah);
+void irdma_puda_free_ah(struct irdma_sc_dev *dev, struct irdma_sc_ah *ah);
+void irdma_ieq_process_fpdus(struct irdma_sc_qp *qp,
+			     struct irdma_puda_rsrc *ieq);
+void irdma_ieq_cleanup_qp(struct irdma_puda_rsrc *ieq, struct irdma_sc_qp *qp);
+#endif /*IRDMA_PROTOS_H */