RDMA/efa: Add the efa_com.h file

[linux-2.6-microblaze.git] / drivers / infiniband / hw / efa / efa_com.h

diff --git a/drivers/infiniband/hw/efa/efa_com.h b/drivers/infiniband/hw/efa/efa_com.h
new file mode 100644 (file)
index 0000000..84d9672
--- /dev/null
+++ b/drivers/infiniband/hw/efa/efa_com.h
@@ -0,0 +1,144 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause */
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All rights reserved.
+ */
+
+#ifndef _EFA_COM_H_
+#define _EFA_COM_H_
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/semaphore.h>
+#include <linux/sched.h>
+
+#include <rdma/ib_verbs.h>
+
+#include "efa_common_defs.h"
+#include "efa_admin_defs.h"
+#include "efa_admin_cmds_defs.h"
+#include "efa_regs_defs.h"
+
+#define EFA_MAX_HANDLERS 256
+
+struct efa_com_admin_cq {
+       struct efa_admin_acq_entry *entries;
+       dma_addr_t dma_addr;
+       spinlock_t lock; /* Protects ACQ */
+
+       u16 cc; /* consumer counter */
+       u8 phase;
+};
+
+struct efa_com_admin_sq {
+       struct efa_admin_aq_entry *entries;
+       dma_addr_t dma_addr;
+       spinlock_t lock; /* Protects ASQ */
+
+       u32 __iomem *db_addr;
+
+       u16 cc; /* consumer counter */
+       u16 pc; /* producer counter */
+       u8 phase;
+
+};
+
+/* Don't use anything other than atomic64 */
+struct efa_com_stats_admin {
+       atomic64_t aborted_cmd;
+       atomic64_t submitted_cmd;
+       atomic64_t completed_cmd;
+       atomic64_t no_completion;
+};
+
+enum {
+       EFA_AQ_STATE_RUNNING_BIT = 0,
+       EFA_AQ_STATE_POLLING_BIT = 1,
+};
+
+struct efa_com_admin_queue {
+       void *dmadev;
+       void *efa_dev;
+       struct efa_comp_ctx *comp_ctx;
+       u32 completion_timeout; /* usecs */
+       u16 poll_interval; /* msecs */
+       u16 depth;
+       struct efa_com_admin_cq cq;
+       struct efa_com_admin_sq sq;
+       u16 msix_vector_idx;
+
+       unsigned long state;
+
+       /* Count the number of available admin commands */
+       struct semaphore avail_cmds;
+
+       struct efa_com_stats_admin stats;
+
+       spinlock_t comp_ctx_lock; /* Protects completion context pool */
+       u32 *comp_ctx_pool;
+       u16 comp_ctx_pool_next;
+};
+
+struct efa_aenq_handlers;
+
+struct efa_com_aenq {
+       struct efa_admin_aenq_entry *entries;
+       struct efa_aenq_handlers *aenq_handlers;
+       dma_addr_t dma_addr;
+       u32 cc; /* consumer counter */
+       u16 msix_vector_idx;
+       u16 depth;
+       u8 phase;
+};
+
+struct efa_com_mmio_read {
+       struct efa_admin_mmio_req_read_less_resp *read_resp;
+       dma_addr_t read_resp_dma_addr;
+       u16 seq_num;
+       u16 mmio_read_timeout; /* usecs */
+       /* serializes mmio reads */
+       spinlock_t lock;
+};
+
+struct efa_com_dev {
+       struct efa_com_admin_queue aq;
+       struct efa_com_aenq aenq;
+       u8 __iomem *reg_bar;
+       void *dmadev;
+       void *efa_dev;
+       u32 supported_features;
+       u32 dma_addr_bits;
+
+       struct efa_com_mmio_read mmio_read;
+};
+
+typedef void (*efa_aenq_handler)(void *data,
+             struct efa_admin_aenq_entry *aenq_e);
+
+/* Holds aenq handlers. Indexed by AENQ event group */
+struct efa_aenq_handlers {
+       efa_aenq_handler handlers[EFA_MAX_HANDLERS];
+       efa_aenq_handler unimplemented_handler;
+};
+
+int efa_com_admin_init(struct efa_com_dev *edev,
+                      struct efa_aenq_handlers *aenq_handlers);
+void efa_com_admin_destroy(struct efa_com_dev *edev);
+int efa_com_dev_reset(struct efa_com_dev *edev,
+                     enum efa_regs_reset_reason_types reset_reason);
+void efa_com_set_admin_polling_mode(struct efa_com_dev *edev, bool polling);
+void efa_com_admin_q_comp_intr_handler(struct efa_com_dev *edev);
+int efa_com_mmio_reg_read_init(struct efa_com_dev *edev);
+void efa_com_mmio_reg_read_destroy(struct efa_com_dev *edev);
+
+int efa_com_validate_version(struct efa_com_dev *edev);
+int efa_com_get_dma_width(struct efa_com_dev *edev);
+
+int efa_com_cmd_exec(struct efa_com_admin_queue *aq,
+                    struct efa_admin_aq_entry *cmd,
+                    size_t cmd_size,
+                    struct efa_admin_acq_entry *comp,
+                    size_t comp_size);
+void efa_com_aenq_intr_handler(struct efa_com_dev *edev, void *data);
+
+#endif /* _EFA_COM_H_ */