On 2/21/2019 9:33 AM, Gal Pressman wrote:
> A helper header file for EFA admin queue, admin queue completion, asynchronous
> notification queue, and various hardware configuration data structures and
> functions.
>
> Signed-off-by: Gal Pressman <galpress@xxxxxxxxxx>
> ---
> drivers/infiniband/hw/efa/efa_com.h | 141 ++++++++++++++++++++++++++++++++++++
> 1 file changed, 141 insertions(+)
> create mode 100644 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
> index 000000000000..439305a8d5e7
> --- /dev/null
> +++ b/drivers/infiniband/hw/efa/efa_com.h
> @@ -0,0 +1,141 @@
> +/* 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/semaphore.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
> +
> +#define ADMIN_SQ_SIZE(depth) ((depth) * sizeof(struct efa_admin_aq_entry))
> +#define ADMIN_CQ_SIZE(depth) ((depth) * sizeof(struct efa_admin_acq_entry))
> +#define ADMIN_AENQ_SIZE(depth) ((depth) * sizeof(struct efa_admin_aenq_entry))
> +
> +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;
> +
> +};
> +
> +struct efa_com_stats_admin {
> + u64 aborted_cmd;
> + u64 submitted_cmd;
> + u64 completed_cmd;
> + u64 no_completion;
> +};
> +
> +enum {
> + EFA_AQ_STATE_RUNNING_BIT = 0,
> + EFA_AQ_STATE_POLLING_BIT = 1,
> +};
> +
> +struct efa_com_admin_queue {
> + void *dmadev;
> + 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 stats_lock; /* Protects 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;
> + u32 supported_features;
> + u32 dma_addr_bits;
> +
> + struct efa_com_mmio_read mmio_read;
> +};
> +
nit: Some structs align the field names, and others don't...
> +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_ */
Reviewed-by: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
