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/* Broadcom NetXtreme-C/E network driver.
*
* Copyright (c) 2020 Broadcom Limited
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation.
*/
#ifndef BNXT_HWRM_H
#define BNXT_HWRM_H
#include "bnxt_hsi.h"
enum bnxt_hwrm_ctx_flags {
/* Update the HWRM_API_FLAGS right below for any new non-internal bit added here */
BNXT_HWRM_INTERNAL_CTX_OWNED = BIT(0), /* caller owns the context */
BNXT_HWRM_INTERNAL_RESP_DIRTY = BIT(1), /* response contains data */
BNXT_HWRM_CTX_SILENT = BIT(2), /* squelch firmware errors */
BNXT_HWRM_FULL_WAIT = BIT(3), /* wait for full timeout of HWRM command */
};
#define HWRM_API_FLAGS (BNXT_HWRM_CTX_SILENT | BNXT_HWRM_FULL_WAIT)
struct bnxt_hwrm_ctx {
u64 sentinel;
dma_addr_t dma_handle;
struct output *resp;
struct input *req;
dma_addr_t slice_handle;
void *slice_addr;
u32 slice_size;
u32 req_len;
enum bnxt_hwrm_ctx_flags flags;
unsigned int timeout;
u32 allocated;
gfp_t gfp;
};
enum bnxt_hwrm_wait_state {
BNXT_HWRM_PENDING,
BNXT_HWRM_DEFERRED,
BNXT_HWRM_COMPLETE,
BNXT_HWRM_CANCELLED,
};
enum bnxt_hwrm_chnl { BNXT_HWRM_CHNL_CHIMP, BNXT_HWRM_CHNL_KONG };
struct bnxt_hwrm_wait_token {
struct rcu_head rcu;
struct hlist_node node;
enum bnxt_hwrm_wait_state state;
enum bnxt_hwrm_chnl dst;
u16 seq_id;
};
void hwrm_update_token(struct bnxt *bp, u16 seq, enum bnxt_hwrm_wait_state s);
#define BNXT_HWRM_MAX_REQ_LEN (bp->hwrm_max_req_len)
#define BNXT_HWRM_SHORT_REQ_LEN sizeof(struct hwrm_short_input)
#define HWRM_CMD_MAX_TIMEOUT 40000U
#define SHORT_HWRM_CMD_TIMEOUT 20
#define HWRM_CMD_TIMEOUT (bp->hwrm_cmd_timeout)
#define HWRM_RESET_TIMEOUT ((HWRM_CMD_TIMEOUT) * 4)
#define BNXT_HWRM_TARGET 0xffff
#define BNXT_HWRM_NO_CMPL_RING -1
#define BNXT_HWRM_REQ_MAX_SIZE 128
#define BNXT_HWRM_DMA_SIZE (2 * PAGE_SIZE) /* space for req+resp */
#define BNXT_HWRM_RESP_RESERVED PAGE_SIZE
#define BNXT_HWRM_RESP_OFFSET (BNXT_HWRM_DMA_SIZE - \
BNXT_HWRM_RESP_RESERVED)
#define BNXT_HWRM_CTX_OFFSET (BNXT_HWRM_RESP_OFFSET - \
sizeof(struct bnxt_hwrm_ctx))
#define BNXT_HWRM_DMA_ALIGN 16
#define BNXT_HWRM_SENTINEL 0xb6e1f68a12e9a7eb /* arbitrary value */
#define BNXT_HWRM_REQS_PER_PAGE (BNXT_PAGE_SIZE / \
BNXT_HWRM_REQ_MAX_SIZE)
#define HWRM_SHORT_MIN_TIMEOUT 3
#define HWRM_SHORT_MAX_TIMEOUT 10
#define HWRM_SHORT_TIMEOUT_COUNTER 5
#define HWRM_MIN_TIMEOUT 25
#define HWRM_MAX_TIMEOUT 40
static inline unsigned int hwrm_total_timeout(unsigned int n)
{
return n <= HWRM_SHORT_TIMEOUT_COUNTER ? n * HWRM_SHORT_MIN_TIMEOUT :
HWRM_SHORT_TIMEOUT_COUNTER * HWRM_SHORT_MIN_TIMEOUT +
(n - HWRM_SHORT_TIMEOUT_COUNTER) * HWRM_MIN_TIMEOUT;
}
#define HWRM_VALID_BIT_DELAY_USEC 50000
static inline bool bnxt_cfa_hwrm_message(u16 req_type)
{
switch (req_type) {
case HWRM_CFA_ENCAP_RECORD_ALLOC:
case HWRM_CFA_ENCAP_RECORD_FREE:
case HWRM_CFA_DECAP_FILTER_ALLOC:
case HWRM_CFA_DECAP_FILTER_FREE:
case HWRM_CFA_EM_FLOW_ALLOC:
case HWRM_CFA_EM_FLOW_FREE:
case HWRM_CFA_EM_FLOW_CFG:
case HWRM_CFA_FLOW_ALLOC:
case HWRM_CFA_FLOW_FREE:
case HWRM_CFA_FLOW_INFO:
case HWRM_CFA_FLOW_FLUSH:
case HWRM_CFA_FLOW_STATS:
case HWRM_CFA_METER_PROFILE_ALLOC:
case HWRM_CFA_METER_PROFILE_FREE:
case HWRM_CFA_METER_PROFILE_CFG:
case HWRM_CFA_METER_INSTANCE_ALLOC:
case HWRM_CFA_METER_INSTANCE_FREE:
return true;
default:
return false;
}
}
static inline bool bnxt_kong_hwrm_message(struct bnxt *bp, struct input *req)
{
return (bp->fw_cap & BNXT_FW_CAP_KONG_MB_CHNL &&
(bnxt_cfa_hwrm_message(le16_to_cpu(req->req_type)) ||
le16_to_cpu(req->target_id) == HWRM_TARGET_ID_KONG));
}
int __hwrm_req_init(struct bnxt *bp, void **req, u16 req_type, u32 req_len);
#define hwrm_req_init(bp, req, req_type) \
__hwrm_req_init((bp), (void **)&(req), (req_type), sizeof(*(req)))
void *hwrm_req_hold(struct bnxt *bp, void *req);
void hwrm_req_drop(struct bnxt *bp, void *req);
void hwrm_req_flags(struct bnxt *bp, void *req, enum bnxt_hwrm_ctx_flags flags);
void hwrm_req_timeout(struct bnxt *bp, void *req, unsigned int timeout);
int hwrm_req_send(struct bnxt *bp, void *req);
int hwrm_req_send_silent(struct bnxt *bp, void *req);
int hwrm_req_replace(struct bnxt *bp, void *req, void *new_req, u32 len);
void hwrm_req_alloc_flags(struct bnxt *bp, void *req, gfp_t flags);
void *hwrm_req_dma_slice(struct bnxt *bp, void *req, u32 size, dma_addr_t *dma);
/* Older devices can only support req length of 128.
* HWRM_FUNC_CFG requests which don't need fields starting at
* num_quic_tx_key_ctxs can use this helper to avoid getting -E2BIG.
*/
static inline int
bnxt_hwrm_func_cfg_short_req_init(struct bnxt *bp,
struct hwrm_func_cfg_input **req)
{
u32 req_len;
req_len = min_t(u32, sizeof(**req), bp->hwrm_max_ext_req_len);
return __hwrm_req_init(bp, (void **)req, HWRM_FUNC_CFG, req_len);
}
#endif
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