From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 99550C7EE25 for ; Fri, 9 Jun 2023 11:15:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236561AbjFILPS (ORCPT ); Fri, 9 Jun 2023 07:15:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58030 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239926AbjFILPC (ORCPT ); Fri, 9 Jun 2023 07:15:02 -0400 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DE74A2115 for ; Fri, 9 Jun 2023 04:14:43 -0700 (PDT) Received: by mail-pl1-x630.google.com with SMTP id d9443c01a7336-1b038064d97so5592835ad.0 for ; Fri, 09 Jun 2023 04:14:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1686309283; x=1688901283; h=references:in-reply-to:message-id:date:subject:cc:to:from:from:to :cc:subject:date:message-id:reply-to; bh=DSJFJVP9qNUfQOXdly2r4DfHO/Ic/jAMYLwSd/nsOX8=; b=UdSgTgitImBSph55s1STsbseiDXMd8M3pbkpbbFaUguy8D12ZbIu6V7VhEI7gC7t99 g+JXv+MIsZgo9DPG4OyMFU23cKl6SsDmXImnQwgvmRLue4+j5VGMKtK0iZMNGDQ+ZIrL Cl02qtLiuHjeugBEkTe3pcfJn+a6Gak1g87Q8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686309283; x=1688901283; h=references:in-reply-to:message-id:date:subject:cc:to:from :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=DSJFJVP9qNUfQOXdly2r4DfHO/Ic/jAMYLwSd/nsOX8=; b=lrRwzAKhXKUg+FqYvkaJkf/sBObL0FxE5ajJRTm8RnuDF1q8Qhim1pMqxFDuvwKG4R yKBlfGx20jkfoX9S2AZesqwrAPiFgoKBvaa3IxkchgiyvSLRDnlgJXiEe/7kWYhZYhwS 2lpEu+FLjByIjYzgd17CIh85rx71VAdS/txEAFFpPdq7u/XCRcO5gESoBticb2bqv+BJ KOOPNVqgaFhXRVJDAl0BN8BPgt6z99jRoCJVWrhTCUIgK3rJnpmnKRfzwkZHP0xHYAo+ KVuQvhFoO8Z3loXSCH7Bk9oljEEHdNELAKIE2eE3Rk+OMb0jiA41UVAI8BftRO7gq25b VclA== X-Gm-Message-State: AC+VfDzQIt770luGAxP+HdKwrwb6UwIPL4yeXDCeTqF1E15haNkLmhQe 2OSHpUgjJsbLpsA0VXu0O3XwTQ== X-Google-Smtp-Source: ACHHUZ5PbTmiPbmR1nsDrdYiUz8fUZEcogYKb9FKLWsTaMemCMWtrQvFH39YlYNXhZRLEEwr6+gAiw== X-Received: by 2002:a17:903:32cd:b0:1af:e302:123 with SMTP id i13-20020a17090332cd00b001afe3020123mr1958343plr.3.1686309283242; Fri, 09 Jun 2023 04:14:43 -0700 (PDT) Received: from dhcp-10-192-206-197.iig.avagotech.net.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id q4-20020a170902dac400b001b0142908f7sm2992954plx.291.2023.06.09.04.14.40 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Fri, 09 Jun 2023 04:14:42 -0700 (PDT) From: Selvin Xavier To: jgg@ziepe.ca, leon@kernel.org Cc: linux-rdma@vger.kernel.org, andrew.gospodarek@broadcom.com, kashyap.desai@broadcom.com, Selvin Xavier Subject: [PATCH v2 for-next 11/17] RDMA/bnxt_re: Add firmware stall check detection Date: Fri, 9 Jun 2023 04:01:48 -0700 Message-Id: <1686308514-11996-12-git-send-email-selvin.xavier@broadcom.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1686308514-11996-1-git-send-email-selvin.xavier@broadcom.com> References: <1686308514-11996-1-git-send-email-selvin.xavier@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000d4e6a005fdb07956" Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org --000000000000d4e6a005fdb07956 From: Kashyap Desai Every completion will update last_seen value in the unit of jiffies. last_seen field will be used to know if firmware is alive and is useful to detect firmware stall. Non blocking interface __wait_for_resp will have logic to detect firmware stall. After every 10 second interval if __wait_for_resp has not received completion for a given command it will check for firmware stall condition. If current jiffies is greater than last_seen jiffies + RCFW_FW_STALL_TIMEOUT_SEC * HZ, it is a firmware stall. Signed-off-by: Kashyap Desai Signed-off-by: Selvin Xavier --- drivers/infiniband/hw/bnxt_re/qplib_rcfw.c | 44 ++++++++++++++++++++++++------ drivers/infiniband/hw/bnxt_re/qplib_rcfw.h | 5 ++-- 2 files changed, 39 insertions(+), 10 deletions(-) diff --git a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c index 4e5f66e..349fbed 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c +++ b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c @@ -112,11 +112,13 @@ static int __wait_for_resp(struct bnxt_qplib_rcfw *rcfw, u16 cookie, u8 opcode) do { if (test_bit(ERR_DEVICE_DETACHED, &cmdq->flags)) return bnxt_qplib_map_rc(opcode); + if (test_bit(FIRMWARE_STALL_DETECTED, &cmdq->flags)) + return -ETIMEDOUT; - /* Non zero means command completed */ wait_event_timeout(cmdq->waitq, !test_bit(cbit, cmdq->cmdq_bitmap), - msecs_to_jiffies(10000)); + msecs_to_jiffies(RCFW_FW_STALL_TIMEOUT_SEC + * 1000)); if (!test_bit(cbit, cmdq->cmdq_bitmap)) return 0; @@ -126,6 +128,11 @@ static int __wait_for_resp(struct bnxt_qplib_rcfw *rcfw, u16 cookie, u8 opcode) if (!test_bit(cbit, cmdq->cmdq_bitmap)) return 0; + /* Firmware stall is detected */ + if (time_after(jiffies, cmdq->last_seen + + (RCFW_FW_STALL_TIMEOUT_SEC * HZ))) + return -ENODEV; + } while (true); }; @@ -154,6 +161,8 @@ static int __block_for_resp(struct bnxt_qplib_rcfw *rcfw, u16 cookie, u8 opcode) do { if (test_bit(ERR_DEVICE_DETACHED, &cmdq->flags)) return bnxt_qplib_map_rc(opcode); + if (test_bit(FIRMWARE_STALL_DETECTED, &cmdq->flags)) + return -ETIMEDOUT; udelay(1); @@ -184,9 +193,6 @@ static int __send_message(struct bnxt_qplib_rcfw *rcfw, hwq = &cmdq->hwq; pdev = rcfw->pdev; - if (test_bit(FIRMWARE_TIMED_OUT, &cmdq->flags)) - return -ETIMEDOUT; - /* Cmdq are in 16-byte units, each request can consume 1 or more * cmdqe */ @@ -285,14 +291,21 @@ static int __poll_for_resp(struct bnxt_qplib_rcfw *rcfw, u16 cookie, do { if (test_bit(ERR_DEVICE_DETACHED, &cmdq->flags)) return bnxt_qplib_map_rc(opcode); + if (test_bit(FIRMWARE_STALL_DETECTED, &cmdq->flags)) + return -ETIMEDOUT; usleep_range(1000, 1001); bnxt_qplib_service_creq(&rcfw->creq.creq_tasklet); if (!test_bit(cbit, cmdq->cmdq_bitmap)) return 0; - if (jiffies_to_msecs(jiffies - issue_time) > 10000) - return -ETIMEDOUT; + if (jiffies_to_msecs(jiffies - issue_time) > + (RCFW_FW_STALL_TIMEOUT_SEC * 1000)) { + /* Firmware stall is detected */ + if (time_after(jiffies, cmdq->last_seen + + (RCFW_FW_STALL_TIMEOUT_SEC * HZ))) + return -ENODEV; + } } while (true); }; @@ -308,6 +321,8 @@ static int __send_message_basic_sanity(struct bnxt_qplib_rcfw *rcfw, /* Prevent posting if f/w is not in a state to process */ if (test_bit(ERR_DEVICE_DETACHED, &rcfw->cmdq.flags)) return -ENXIO; + if (test_bit(FIRMWARE_STALL_DETECTED, &cmdq->flags)) + return -ETIMEDOUT; if (test_bit(FIRMWARE_INITIALIZED_FLAG, &cmdq->flags) && opcode == CMDQ_BASE_OPCODE_INITIALIZE_FW) { @@ -375,7 +390,6 @@ static int __bnxt_qplib_rcfw_send_message(struct bnxt_qplib_rcfw *rcfw, /* timed out */ dev_err(&rcfw->pdev->dev, "cmdq[%#x]=%#x timedout (%d)msec\n", cookie, opcode, RCFW_CMD_WAIT_TIME_MS); - set_bit(FIRMWARE_TIMED_OUT, &rcfw->cmdq.flags); return rc; } @@ -383,6 +397,8 @@ static int __bnxt_qplib_rcfw_send_message(struct bnxt_qplib_rcfw *rcfw, spin_lock_irqsave(&rcfw->cmdq.hwq.lock, flags); crsqe = &rcfw->crsqe_tbl[cbit]; crsqe->is_waiter_alive = false; + if (rc == -ENODEV) + set_bit(FIRMWARE_STALL_DETECTED, &rcfw->cmdq.flags); spin_unlock_irqrestore(&rcfw->cmdq.hwq.lock, flags); return -ETIMEDOUT; } @@ -533,6 +549,17 @@ static int bnxt_qplib_process_qp_event(struct bnxt_qplib_rcfw *rcfw, cookie &= RCFW_MAX_COOKIE_VALUE; cbit = cookie % rcfw->cmdq_depth; crsqe = &rcfw->crsqe_tbl[cbit]; + + if (WARN_ONCE(test_bit(FIRMWARE_STALL_DETECTED, + &rcfw->cmdq.flags), + "QPLIB: Unreponsive rcfw channel detected.!!")) { + dev_info(&pdev->dev, + "rcfw timedout: cookie = %#x, free_slots = %d", + cookie, crsqe->free_slots); + spin_unlock_irqrestore(&hwq->lock, flags); + return rc; + } + if (!test_and_clear_bit(cbit, rcfw->cmdq.cmdq_bitmap)) dev_warn(&pdev->dev, "CMD bit %d was not requested\n", cbit); @@ -582,6 +609,7 @@ static void bnxt_qplib_service_creq(struct tasklet_struct *t) * reading any further. */ dma_rmb(); + rcfw->cmdq.last_seen = jiffies; type = creqe->type & CREQ_BASE_TYPE_MASK; switch (type) { diff --git a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h index 6ed81c1..54576f1 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h +++ b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h @@ -51,6 +51,7 @@ #define RCFW_DBR_PCI_BAR_REGION 2 #define RCFW_DBR_BASE_PAGE_SHIFT 12 +#define RCFW_FW_STALL_TIMEOUT_SEC 40 /* Cmdq contains a fix number of a 16-Byte slots */ struct bnxt_qplib_cmdqe { @@ -128,7 +129,6 @@ static inline u32 bnxt_qplib_set_cmd_slots(struct cmdq_base *req) #define RCFW_MAX_COOKIE_VALUE (BNXT_QPLIB_CMDQE_MAX_CNT - 1) #define RCFW_CMD_IS_BLOCKING 0x8000 -#define RCFW_BLOCKED_CMD_WAIT_COUNT 20000000UL /* 20 sec */ /* Crsq buf is 1024-Byte */ struct bnxt_qplib_crsbe { @@ -170,7 +170,7 @@ struct bnxt_qplib_qp_node { #define FIRMWARE_INITIALIZED_FLAG (0) #define FIRMWARE_FIRST_FLAG (31) -#define FIRMWARE_TIMED_OUT (3) +#define FIRMWARE_STALL_DETECTED (3) #define ERR_DEVICE_DETACHED (4) struct bnxt_qplib_cmdq_mbox { @@ -185,6 +185,7 @@ struct bnxt_qplib_cmdq_ctx { wait_queue_head_t waitq; unsigned long flags; unsigned long *cmdq_bitmap; + unsigned long last_seen; u32 seq_num; }; -- 2.5.5 --000000000000d4e6a005fdb07956 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQfAYJKoZIhvcNAQcCoIIQbTCCEGkCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3TMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD 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