Commit 84fcd944 authored by Shruti Parab's avatar Shruti Parab Committed by Jakub Kicinski
Browse files

bnxt_en: Manage the FW trace context memory 



The FW trace memory pages will be added to the ethtool -w coredump
in later patches.  In addition to the raw data, the driver has to
add a header to provide the head and tail information on each FW
trace log segment when creating the coredump.  The FW sends an async
message to the driver after DMAing a chunk of logs to the context
memory to indicate the last offset containing the tail of the logs.
The driver needs to keep track of that.

Reviewed-by: default avatarHongguang Gao <hongguang.gao@broadcom.com>
Signed-off-by: default avatarShruti Parab <shruti.parab@broadcom.com>
Signed-off-by: default avatarMichael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20241115151438.550106-7-michael.chan@broadcom.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 24d694ae

drivers/net/ethernet/broadcom/bnxt/bnxt.c

+67 −0
Original line number Diff line number Diff line
@@ -245,6 +245,21 @@ static const u16 bnxt_async_events_arr[] = { 
	ASYNC_EVENT_CMPL_EVENT_ID_PPS_TIMESTAMP,

	ASYNC_EVENT_CMPL_EVENT_ID_ERROR_REPORT,

	ASYNC_EVENT_CMPL_EVENT_ID_PHC_UPDATE,

	ASYNC_EVENT_CMPL_EVENT_ID_DBG_BUF_PRODUCER,

};



const u16 bnxt_bstore_to_trace[] = {

	[BNXT_CTX_SRT]		= DBG_LOG_BUFFER_FLUSH_REQ_TYPE_SRT_TRACE,

	[BNXT_CTX_SRT2]		= DBG_LOG_BUFFER_FLUSH_REQ_TYPE_SRT2_TRACE,

	[BNXT_CTX_CRT]		= DBG_LOG_BUFFER_FLUSH_REQ_TYPE_CRT_TRACE,

	[BNXT_CTX_CRT2]		= DBG_LOG_BUFFER_FLUSH_REQ_TYPE_CRT2_TRACE,

	[BNXT_CTX_RIGP0]	= DBG_LOG_BUFFER_FLUSH_REQ_TYPE_RIGP0_TRACE,

	[BNXT_CTX_L2HWRM]	= DBG_LOG_BUFFER_FLUSH_REQ_TYPE_L2_HWRM_TRACE,

	[BNXT_CTX_REHWRM]	= DBG_LOG_BUFFER_FLUSH_REQ_TYPE_ROCE_HWRM_TRACE,

	[BNXT_CTX_CA0]		= DBG_LOG_BUFFER_FLUSH_REQ_TYPE_CA0_TRACE,

	[BNXT_CTX_CA1]		= DBG_LOG_BUFFER_FLUSH_REQ_TYPE_CA1_TRACE,

	[BNXT_CTX_CA2]		= DBG_LOG_BUFFER_FLUSH_REQ_TYPE_CA2_TRACE,

	[BNXT_CTX_RIGP1]	= DBG_LOG_BUFFER_FLUSH_REQ_TYPE_RIGP1_TRACE,

};



static struct workqueue_struct *bnxt_pf_wq;
@@ -2470,6 +2485,50 @@ bool bnxt_bs_trace_avail(struct bnxt *bp, u16 type) 
		 (flags & BNXT_CTX_MEM_FW_BIN_TRACE));

}



static void bnxt_bs_trace_init(struct bnxt *bp, struct bnxt_ctx_mem_type *ctxm)

{

	u32 mem_size, pages, rem_bytes, magic_byte_offset;

	u16 trace_type = bnxt_bstore_to_trace[ctxm->type];

	struct bnxt_ctx_pg_info *ctx_pg = ctxm->pg_info;

	struct bnxt_ring_mem_info *rmem, *rmem_pg_tbl;

	struct bnxt_bs_trace_info *bs_trace;

	int last_pg;



	if (ctxm->instance_bmap && ctxm->instance_bmap > 1)

		return;



	mem_size = ctxm->max_entries * ctxm->entry_size;

	rem_bytes = mem_size % BNXT_PAGE_SIZE;

	pages = DIV_ROUND_UP(mem_size, BNXT_PAGE_SIZE);



	last_pg = (pages - 1) & (MAX_CTX_PAGES - 1);

	magic_byte_offset = (rem_bytes ? rem_bytes : BNXT_PAGE_SIZE) - 1;



	rmem = &ctx_pg[0].ring_mem;

	bs_trace = &bp->bs_trace[trace_type];

	bs_trace->ctx_type = ctxm->type;

	bs_trace->trace_type = trace_type;

	if (pages > MAX_CTX_PAGES) {

		int last_pg_dir = rmem->nr_pages - 1;



		rmem_pg_tbl = &ctx_pg[0].ctx_pg_tbl[last_pg_dir]->ring_mem;

		bs_trace->magic_byte = rmem_pg_tbl->pg_arr[last_pg];

	} else {

		bs_trace->magic_byte = rmem->pg_arr[last_pg];

	}

	bs_trace->magic_byte += magic_byte_offset;

	*bs_trace->magic_byte = BNXT_TRACE_BUF_MAGIC_BYTE;

}



#define BNXT_EVENT_BUF_PRODUCER_TYPE(data1)				\

	(((data1) & ASYNC_EVENT_CMPL_DBG_BUF_PRODUCER_EVENT_DATA1_TYPE_MASK) >>\

	 ASYNC_EVENT_CMPL_DBG_BUF_PRODUCER_EVENT_DATA1_TYPE_SFT)



#define BNXT_EVENT_BUF_PRODUCER_OFFSET(data2)				\

	(((data2) &							\

	  ASYNC_EVENT_CMPL_DBG_BUF_PRODUCER_EVENT_DATA2_CURR_OFF_MASK) >>\

	 ASYNC_EVENT_CMPL_DBG_BUF_PRODUCER_EVENT_DATA2_CURR_OFF_SFT)



#define BNXT_EVENT_THERMAL_CURRENT_TEMP(data2)				\

	((data2) &							\

	  ASYNC_EVENT_CMPL_ERROR_REPORT_THERMAL_EVENT_DATA2_CURRENT_TEMP_MASK)
@@ -2786,6 +2845,13 @@ static int bnxt_async_event_process(struct bnxt *bp, 
		hwrm_update_token(bp, seq_id, BNXT_HWRM_DEFERRED);

		goto async_event_process_exit;

	}

	case ASYNC_EVENT_CMPL_EVENT_ID_DBG_BUF_PRODUCER: {

		u16 type = (u16)BNXT_EVENT_BUF_PRODUCER_TYPE(data1);

		u32 offset =  BNXT_EVENT_BUF_PRODUCER_OFFSET(data2);



		bnxt_bs_trace_check_wrap(&bp->bs_trace[type], offset);

		goto async_event_process_exit;

	}

	default:

		goto async_event_process_exit;

	}
@@ -8769,6 +8835,7 @@ static int bnxt_backing_store_cfg_v2(struct bnxt *bp, u32 ena) 
					    type);

				continue;

			}

			bnxt_bs_trace_init(bp, ctxm);

			last_type = type;

		}

	}

drivers/net/ethernet/broadcom/bnxt/bnxt.h

+22 −0
Original line number Diff line number Diff line
@@ -2112,6 +2112,26 @@ enum board_idx { 
	NETXTREME_E_P7_VF,

};



#define BNXT_TRACE_BUF_MAGIC_BYTE ((u8)0xbc)

#define BNXT_TRACE_MAX 11



struct bnxt_bs_trace_info {

	u8 *magic_byte;

	u32 last_offset;

	u8 wrapped:1;

	u16 ctx_type;

	u16 trace_type;

};



static inline void bnxt_bs_trace_check_wrap(struct bnxt_bs_trace_info *bs_trace,

					    u32 offset)

{

	if (!bs_trace->wrapped &&

	    *bs_trace->magic_byte != BNXT_TRACE_BUF_MAGIC_BYTE)

		bs_trace->wrapped = 1;

	bs_trace->last_offset = offset;

}



struct bnxt {

	void __iomem		*bar0;

	void __iomem		*bar1;
@@ -2668,6 +2688,7 @@ struct bnxt { 


	struct bnxt_ctx_pg_info	*fw_crash_mem;

	u32			fw_crash_len;

	struct bnxt_bs_trace_info bs_trace[BNXT_TRACE_MAX];

};



#define BNXT_NUM_RX_RING_STATS			8
@@ -2803,6 +2824,7 @@ static inline bool bnxt_sriov_cfg(struct bnxt *bp) 
#endif

}



extern const u16 bnxt_bstore_to_trace[];

extern const u16 bnxt_lhint_arr[];



int bnxt_alloc_rx_data(struct bnxt *bp, struct bnxt_rx_ring_info *rxr,