bnx2x: validate FW trace prior to its printing
Signed-off-by: Dmitry Kravkov <dmitry@broadcom.com> Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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2 changed files with 13 additions and 1 deletions
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@ -1129,6 +1129,8 @@ struct shm_dev_info { /* size */
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#define FW_ACK_NUM_OF_POLL (FW_ACK_TIME_OUT_MS/FW_ACK_POLL_TIME_MS)
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#define MFW_TRACE_SIGNATURE 0x54524342
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/****************************************************************************
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* Driver <-> FW Mailbox *
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****************************************************************************/
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@ -719,7 +719,17 @@ void bnx2x_fw_dump_lvl(struct bnx2x *bp, const char *lvl)
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trace_shmem_base = bp->common.shmem_base;
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else
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trace_shmem_base = SHMEM2_RD(bp, other_shmem_base_addr);
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addr = trace_shmem_base - 0x0800 + 4;
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addr = trace_shmem_base - 0x800;
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/* validate TRCB signature */
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mark = REG_RD(bp, addr);
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if (mark != MFW_TRACE_SIGNATURE) {
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BNX2X_ERR("Trace buffer signature is missing.");
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return ;
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}
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/* read cyclic buffer pointer */
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addr += 4;
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mark = REG_RD(bp, addr);
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mark = (CHIP_IS_E1x(bp) ? MCP_REG_MCPR_SCRATCH : MCP_A_REG_MCPR_SCRATCH)
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+ ((mark + 0x3) & ~0x3) - 0x08000000;
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