From patchwork Wed Aug 11 12:33:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 12431145 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4FB5AC4338F for ; Wed, 11 Aug 2021 12:34:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2947260FE6 for ; Wed, 11 Aug 2021 12:34:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229847AbhHKMee (ORCPT ); Wed, 11 Aug 2021 08:34:34 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:52842 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231700AbhHKMeY (ORCPT ); Wed, 11 Aug 2021 08:34:24 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 17BCXlc2014869; Wed, 11 Aug 2021 07:33:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1628685227; bh=HtVlu5vamZ+/bnr3Oc9P0wb8o/E/T9hmFwSHky9CGS4=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=OaYJVgN0TUxKPFfxwg9TQ234DWxA+rDRo/IDfCSCJSsehniuJKKveqCzUbU6QPuXa MyQQ1zrVHWZzOjsy8YF2TyhLBBk05xLNwimZheSn44yixZwOXXWTaqNsQVFdMfBqK2 jLcSaFbadQwy6TfOtgPdH4nQAApLWEqNdMbU4pb8= Received: from DFLE102.ent.ti.com (dfle102.ent.ti.com [10.64.6.23]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 17BCXlHh060003 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 11 Aug 2021 07:33:47 -0500 Received: from DFLE107.ent.ti.com (10.64.6.28) by DFLE102.ent.ti.com (10.64.6.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Wed, 11 Aug 2021 07:33:47 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE107.ent.ti.com (10.64.6.28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Wed, 11 Aug 2021 07:33:47 -0500 Received: from a0393678-ssd.dal.design.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 17BCXbiv083813; Wed, 11 Aug 2021 07:33:42 -0500 From: Kishon Vijay Abraham I To: Lorenzo Pieralisi , Arnd Bergmann , Rob Herring , Bjorn Helgaas CC: Lokesh Vutla , , Greg Kroah-Hartman , Tom Joseph , , , , , Subject: [PATCH v3 1/5] PCI: cadence: Use bitfield for *quirk_retrain_flag* instead of bool Date: Wed, 11 Aug 2021 18:03:32 +0530 Message-ID: <20210811123336.31357-2-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210811123336.31357-1-kishon@ti.com> References: <20210811123336.31357-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org No functional change. As we are intending to add additional 1-bit members in struct j721e_pcie_data/struct cdns_pcie_rc, use bitfields instead of bool since it takes less space. As discussed in [1], the preference is to use bitfileds instead of bool inside structures. [1] -> https://lore.kernel.org/linux-fsdevel/CA+55aFzKQ6Pj18TB8p4Yr0M4t+S+BsiHH=BJNmn=76-NcjTj-g@mail.gmail.com/ Suggested-by: Bjorn Helgaas Signed-off-by: Kishon Vijay Abraham I --- drivers/pci/controller/cadence/pci-j721e.c | 2 +- drivers/pci/controller/cadence/pcie-cadence.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c index 35e61048e133..0c5813b230b4 100644 --- a/drivers/pci/controller/cadence/pci-j721e.c +++ b/drivers/pci/controller/cadence/pci-j721e.c @@ -66,7 +66,7 @@ enum j721e_pcie_mode { struct j721e_pcie_data { enum j721e_pcie_mode mode; - bool quirk_retrain_flag; + unsigned int quirk_retrain_flag:1; }; static inline u32 j721e_pcie_user_readl(struct j721e_pcie *pcie, u32 offset) diff --git a/drivers/pci/controller/cadence/pcie-cadence.h b/drivers/pci/controller/cadence/pcie-cadence.h index b72de578b996..6f97fb4e58a6 100644 --- a/drivers/pci/controller/cadence/pcie-cadence.h +++ b/drivers/pci/controller/cadence/pcie-cadence.h @@ -312,7 +312,7 @@ struct cdns_pcie_rc { u32 vendor_id; u32 device_id; bool avail_ib_bar[CDNS_PCIE_RP_MAX_IB]; - bool quirk_retrain_flag; + unsigned int quirk_retrain_flag:1; }; /** From patchwork Wed Aug 11 12:33:33 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 12431147 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB553C4320E for ; Wed, 11 Aug 2021 12:34:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8C262610A8 for ; Wed, 11 Aug 2021 12:34:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230025AbhHKMee (ORCPT ); Wed, 11 Aug 2021 08:34:34 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:52856 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231814AbhHKMe1 (ORCPT ); Wed, 11 Aug 2021 08:34:27 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 17BCXqBJ014891; Wed, 11 Aug 2021 07:33:52 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1628685232; bh=XtuvWthdCIKdMNXqtepjb4Ycn1MAXAsmL0B0bltcYB8=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=UL1+16HT26PYi15C8NSbXtOCjxHo5UOzld757WXOt72vaEai8aLhput5rPviku61U wxhop0UMp/lgWONpYhLjNy5WxfIePDKBNIsT4Mwt3m2rVPNSdHwP7qcgmJZb1vI8Vg unLIioazCXXcAKT/jCvaxR+z3lr0W1JxOAfo8lKI= Received: from DLEE100.ent.ti.com (dlee100.ent.ti.com [157.170.170.30]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 17BCXqI3060190 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 11 Aug 2021 07:33:52 -0500 Received: from DLEE111.ent.ti.com (157.170.170.22) by DLEE100.ent.ti.com (157.170.170.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Wed, 11 Aug 2021 07:33:52 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE111.ent.ti.com (157.170.170.22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Wed, 11 Aug 2021 07:33:52 -0500 Received: from a0393678-ssd.dal.design.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 17BCXbiw083813; Wed, 11 Aug 2021 07:33:47 -0500 From: Kishon Vijay Abraham I To: Lorenzo Pieralisi , Arnd Bergmann , Rob Herring , Bjorn Helgaas CC: Lokesh Vutla , , Greg Kroah-Hartman , Tom Joseph , , , , , Subject: [PATCH v3 2/5] PCI: cadence: Add quirk flag to set minimum delay in LTSSM Detect.Quiet state Date: Wed, 11 Aug 2021 18:03:33 +0530 Message-ID: <20210811123336.31357-3-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210811123336.31357-1-kishon@ti.com> References: <20210811123336.31357-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org From: Nadeem Athani PCIe fails to link up if SERDES lanes not used by PCIe are assigned to another protocol. For example, link training fails if lanes 2 and 3 are assigned to another protocol while lanes 0 and 1 are used for PCIe to form a two lane link. This failure is due to an incorrect tie-off on an internal status signal indicating electrical idle. Status signals going from SERDES to PCIe Controller are tied-off when a lane is not assigned to PCIe. Signal indicating electrical idle is incorrectly tied-off to a state that indicates non-idle. As a result, PCIe sees unused lanes to be out of electrical idle and this causes LTSSM to exit Detect.Quiet state without waiting for 12ms timeout to occur. If a receiver is not detected on the first receiver detection attempt in Detect.Active state, LTSSM goes back to Detect.Quiet and again moves forward to Detect.Active state without waiting for 12ms as required by PCIe base specification. Since wait time in Detect.Quiet is skipped, multiple receiver detect operations are performed back-to-back without allowing time for capacitance on the transmit lines to discharge. This causes subsequent receiver detection to always fail even if a receiver gets connected eventually. Add a quirk flag "quirk_detect_quiet_flag" to program the minimum time the LTSSM should wait on entering Detect.Quiet state here. This has to be set for J7200 as it has an incorrect tie-off on unused lanes. Signed-off-by: Nadeem Athani Signed-off-by: Kishon Vijay Abraham I --- drivers/pci/controller/cadence/pcie-cadence-ep.c | 4 ++++ .../pci/controller/cadence/pcie-cadence-host.c | 3 +++ drivers/pci/controller/cadence/pcie-cadence.c | 16 ++++++++++++++++ drivers/pci/controller/cadence/pcie-cadence.h | 15 +++++++++++++++ 4 files changed, 38 insertions(+) diff --git a/drivers/pci/controller/cadence/pcie-cadence-ep.c b/drivers/pci/controller/cadence/pcie-cadence-ep.c index 443dd06dfcfc..f021ca0b5f01 100644 --- a/drivers/pci/controller/cadence/pcie-cadence-ep.c +++ b/drivers/pci/controller/cadence/pcie-cadence-ep.c @@ -711,6 +711,10 @@ int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep) ep->irq_pci_addr = CDNS_PCIE_EP_IRQ_PCI_ADDR_NONE; /* Reserve region 0 for IRQs */ set_bit(0, &ep->ob_region_map); + + if (ep->quirk_detect_quiet_flag) + cdns_pcie_detect_quiet_min_delay_set(&ep->pcie); + spin_lock_init(&ep->lock); return 0; diff --git a/drivers/pci/controller/cadence/pcie-cadence-host.c b/drivers/pci/controller/cadence/pcie-cadence-host.c index ae1c55503513..fb96d37a135c 100644 --- a/drivers/pci/controller/cadence/pcie-cadence-host.c +++ b/drivers/pci/controller/cadence/pcie-cadence-host.c @@ -498,6 +498,9 @@ int cdns_pcie_host_setup(struct cdns_pcie_rc *rc) return PTR_ERR(rc->cfg_base); rc->cfg_res = res; + if (rc->quirk_detect_quiet_flag) + cdns_pcie_detect_quiet_min_delay_set(&rc->pcie); + ret = cdns_pcie_start_link(pcie); if (ret) { dev_err(dev, "Failed to start link\n"); diff --git a/drivers/pci/controller/cadence/pcie-cadence.c b/drivers/pci/controller/cadence/pcie-cadence.c index 3c3646502d05..52767f26048f 100644 --- a/drivers/pci/controller/cadence/pcie-cadence.c +++ b/drivers/pci/controller/cadence/pcie-cadence.c @@ -7,6 +7,22 @@ #include "pcie-cadence.h" +void cdns_pcie_detect_quiet_min_delay_set(struct cdns_pcie *pcie) +{ + u32 delay = 0x3; + u32 ltssm_control_cap; + + /* + * Set the LTSSM Detect Quiet state min. delay to 2ms. + */ + ltssm_control_cap = cdns_pcie_readl(pcie, CDNS_PCIE_LTSSM_CONTROL_CAP); + ltssm_control_cap = ((ltssm_control_cap & + ~CDNS_PCIE_DETECT_QUIET_MIN_DELAY_MASK) | + CDNS_PCIE_DETECT_QUIET_MIN_DELAY(delay)); + + cdns_pcie_writel(pcie, CDNS_PCIE_LTSSM_CONTROL_CAP, ltssm_control_cap); +} + void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 busnr, u8 fn, u32 r, bool is_io, u64 cpu_addr, u64 pci_addr, size_t size) diff --git a/drivers/pci/controller/cadence/pcie-cadence.h b/drivers/pci/controller/cadence/pcie-cadence.h index 6f97fb4e58a6..5bad4542b8a9 100644 --- a/drivers/pci/controller/cadence/pcie-cadence.h +++ b/drivers/pci/controller/cadence/pcie-cadence.h @@ -198,6 +198,14 @@ /* AXI link down register */ #define CDNS_PCIE_AT_LINKDOWN (CDNS_PCIE_AT_BASE + 0x0824) +/* LTSSM Capabilities register */ +#define CDNS_PCIE_LTSSM_CONTROL_CAP (CDNS_PCIE_LM_BASE + 0x0054) +#define CDNS_PCIE_DETECT_QUIET_MIN_DELAY_MASK GENMASK(2, 1) +#define CDNS_PCIE_DETECT_QUIET_MIN_DELAY_SHIFT 1 +#define CDNS_PCIE_DETECT_QUIET_MIN_DELAY(delay) \ + (((delay) << CDNS_PCIE_DETECT_QUIET_MIN_DELAY_SHIFT) & \ + CDNS_PCIE_DETECT_QUIET_MIN_DELAY_MASK) + enum cdns_pcie_rp_bar { RP_BAR_UNDEFINED = -1, RP_BAR0, @@ -304,6 +312,7 @@ struct cdns_pcie { * @avail_ib_bar: Satus of RP_BAR0, RP_BAR1 and RP_NO_BAR if it's free or * available * @quirk_retrain_flag: Retrain link as quirk for PCIe Gen2 + * @quirk_detect_quiet_flag: LTSSM Detect Quiet min delay set as quirk */ struct cdns_pcie_rc { struct cdns_pcie pcie; @@ -313,6 +322,7 @@ struct cdns_pcie_rc { u32 device_id; bool avail_ib_bar[CDNS_PCIE_RP_MAX_IB]; unsigned int quirk_retrain_flag:1; + unsigned int quirk_detect_quiet_flag:1; }; /** @@ -345,6 +355,7 @@ struct cdns_pcie_epf { * registers fields (RMW) accessible by both remote RC and EP to * minimize time between read and write * @epf: Structure to hold info about endpoint function + * @quirk_detect_quiet_flag: LTSSM Detect Quiet min delay set as quirk */ struct cdns_pcie_ep { struct cdns_pcie pcie; @@ -359,6 +370,7 @@ struct cdns_pcie_ep { /* protect writing to PCI_STATUS while raising legacy interrupts */ spinlock_t lock; struct cdns_pcie_epf *epf; + unsigned int quirk_detect_quiet_flag:1; }; @@ -519,6 +531,9 @@ static inline int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep) return 0; } #endif + +void cdns_pcie_detect_quiet_min_delay_set(struct cdns_pcie *pcie); + void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 busnr, u8 fn, u32 r, bool is_io, u64 cpu_addr, u64 pci_addr, size_t size); From patchwork Wed Aug 11 12:33:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 12431149 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5B6D2C4338F for ; Wed, 11 Aug 2021 12:34:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 40A7A6108C for ; Wed, 11 Aug 2021 12:34:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230109AbhHKMef (ORCPT ); Wed, 11 Aug 2021 08:34:35 -0400 Received: from fllv0016.ext.ti.com ([198.47.19.142]:56250 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229820AbhHKMee (ORCPT ); Wed, 11 Aug 2021 08:34:34 -0400 Received: from fllv0034.itg.ti.com ([10.64.40.246]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 17BCXv6o080205; Wed, 11 Aug 2021 07:33:57 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1628685237; bh=aNc4udZAXRyrS3hAXEprxS2AyJK0I5nK13MvGZMuHD8=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=f/fEnwStUgSBtlAoApddjyNvUUzXr7FQuXxSYnT8V3P8JzWSWSE5iyyFHv9DEGiGY pgwi7YU2iD5zQA7WwF7qHsARu6DkfKXIGqTkgojtYFm3w5/qtXSB/G/WyssTMbX6gx OPax+u3rB2Vn/H7fYKaQk8YEpgC+N9wxU7pqV9p0= Received: from DFLE105.ent.ti.com (dfle105.ent.ti.com [10.64.6.26]) by fllv0034.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 17BCXvtr009227 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 11 Aug 2021 07:33:57 -0500 Received: from DFLE111.ent.ti.com (10.64.6.32) by DFLE105.ent.ti.com (10.64.6.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Wed, 11 Aug 2021 07:33:57 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE111.ent.ti.com (10.64.6.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Wed, 11 Aug 2021 07:33:57 -0500 Received: from a0393678-ssd.dal.design.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 17BCXbix083813; Wed, 11 Aug 2021 07:33:52 -0500 From: Kishon Vijay Abraham I To: Lorenzo Pieralisi , Arnd Bergmann , Rob Herring , Bjorn Helgaas CC: Lokesh Vutla , , Greg Kroah-Hartman , Tom Joseph , , , , , Subject: [PATCH v3 3/5] PCI: j721e: Add PCIe support for J7200 Date: Wed, 11 Aug 2021 18:03:34 +0530 Message-ID: <20210811123336.31357-4-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210811123336.31357-1-kishon@ti.com> References: <20210811123336.31357-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org J7200 has the same PCIe IP as in J721E with minor changes in the wrapper. J7200 allows byte access of bridge configuration space registers and the register field for LINK_DOWN interrupt is different. J7200 also requires "quirk_detect_quiet_flag" to be set. Configure these changes as part of driver data applicable only to J7200. Signed-off-by: Kishon Vijay Abraham I --- drivers/pci/controller/cadence/pci-j721e.c | 40 +++++++++++++++++++--- 1 file changed, 36 insertions(+), 4 deletions(-) diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c index 0c5813b230b4..10b13b728284 100644 --- a/drivers/pci/controller/cadence/pci-j721e.c +++ b/drivers/pci/controller/cadence/pci-j721e.c @@ -27,6 +27,7 @@ #define STATUS_REG_SYS_2 0x508 #define STATUS_CLR_REG_SYS_2 0x708 #define LINK_DOWN BIT(1) +#define J7200_LINK_DOWN BIT(10) #define J721E_PCIE_USER_CMD_STATUS 0x4 #define LINK_TRAINING_ENABLE BIT(0) @@ -57,6 +58,7 @@ struct j721e_pcie { struct cdns_pcie *cdns_pcie; void __iomem *user_cfg_base; void __iomem *intd_cfg_base; + u32 linkdown_irq_regfield; }; enum j721e_pcie_mode { @@ -67,6 +69,9 @@ enum j721e_pcie_mode { struct j721e_pcie_data { enum j721e_pcie_mode mode; unsigned int quirk_retrain_flag:1; + unsigned int quirk_detect_quiet_flag:1; + u32 linkdown_irq_regfield; + unsigned int byte_access_allowed:1; }; static inline u32 j721e_pcie_user_readl(struct j721e_pcie *pcie, u32 offset) @@ -98,12 +103,12 @@ static irqreturn_t j721e_pcie_link_irq_handler(int irq, void *priv) u32 reg; reg = j721e_pcie_intd_readl(pcie, STATUS_REG_SYS_2); - if (!(reg & LINK_DOWN)) + if (!(reg & pcie->linkdown_irq_regfield)) return IRQ_NONE; dev_err(dev, "LINK DOWN!\n"); - j721e_pcie_intd_writel(pcie, STATUS_CLR_REG_SYS_2, LINK_DOWN); + j721e_pcie_intd_writel(pcie, STATUS_CLR_REG_SYS_2, pcie->linkdown_irq_regfield); return IRQ_HANDLED; } @@ -112,7 +117,7 @@ static void j721e_pcie_config_link_irq(struct j721e_pcie *pcie) u32 reg; reg = j721e_pcie_intd_readl(pcie, ENABLE_REG_SYS_2); - reg |= LINK_DOWN; + reg |= pcie->linkdown_irq_regfield; j721e_pcie_intd_writel(pcie, ENABLE_REG_SYS_2, reg); } @@ -284,10 +289,25 @@ static struct pci_ops cdns_ti_pcie_host_ops = { static const struct j721e_pcie_data j721e_pcie_rc_data = { .mode = PCI_MODE_RC, .quirk_retrain_flag = true, + .byte_access_allowed = false, + .linkdown_irq_regfield = LINK_DOWN, }; static const struct j721e_pcie_data j721e_pcie_ep_data = { .mode = PCI_MODE_EP, + .linkdown_irq_regfield = LINK_DOWN, +}; + +static const struct j721e_pcie_data j7200_pcie_rc_data = { + .mode = PCI_MODE_RC, + .quirk_detect_quiet_flag = true, + .linkdown_irq_regfield = J7200_LINK_DOWN, + .byte_access_allowed = true, +}; + +static const struct j721e_pcie_data j7200_pcie_ep_data = { + .mode = PCI_MODE_EP, + .quirk_detect_quiet_flag = true, }; static const struct of_device_id of_j721e_pcie_match[] = { @@ -299,6 +319,14 @@ static const struct of_device_id of_j721e_pcie_match[] = { .compatible = "ti,j721e-pcie-ep", .data = &j721e_pcie_ep_data, }, + { + .compatible = "ti,j7200-pcie-host", + .data = &j7200_pcie_rc_data, + }, + { + .compatible = "ti,j7200-pcie-ep", + .data = &j7200_pcie_ep_data, + }, {}, }; @@ -332,6 +360,7 @@ static int j721e_pcie_probe(struct platform_device *pdev) pcie->dev = dev; pcie->mode = mode; + pcie->linkdown_irq_regfield = data->linkdown_irq_regfield; base = devm_platform_ioremap_resource_byname(pdev, "intd_cfg"); if (IS_ERR(base)) @@ -391,9 +420,11 @@ static int j721e_pcie_probe(struct platform_device *pdev) goto err_get_sync; } - bridge->ops = &cdns_ti_pcie_host_ops; + if (!data->byte_access_allowed) + bridge->ops = &cdns_ti_pcie_host_ops; rc = pci_host_bridge_priv(bridge); rc->quirk_retrain_flag = data->quirk_retrain_flag; + rc->quirk_detect_quiet_flag = data->quirk_detect_quiet_flag; cdns_pcie = &rc->pcie; cdns_pcie->dev = dev; @@ -459,6 +490,7 @@ static int j721e_pcie_probe(struct platform_device *pdev) ret = -ENOMEM; goto err_get_sync; } + ep->quirk_detect_quiet_flag = data->quirk_detect_quiet_flag; cdns_pcie = &ep->pcie; cdns_pcie->dev = dev; From patchwork Wed Aug 11 12:33:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 12431151 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C8A47C4338F for ; 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Wed, 11 Aug 2021 07:34:03 -0500 Received: from DLEE107.ent.ti.com (157.170.170.37) by DLEE107.ent.ti.com (157.170.170.37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Wed, 11 Aug 2021 07:34:02 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DLEE107.ent.ti.com (157.170.170.37) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Wed, 11 Aug 2021 07:34:02 -0500 Received: from a0393678-ssd.dal.design.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 17BCXbj0083813; Wed, 11 Aug 2021 07:33:57 -0500 From: Kishon Vijay Abraham I To: Lorenzo Pieralisi , Arnd Bergmann , Rob Herring , Bjorn Helgaas CC: Lokesh Vutla , , Greg Kroah-Hartman , Tom Joseph , , , , , Subject: [PATCH v3 4/5] PCI: j721e: Add PCIe support for AM64 Date: Wed, 11 Aug 2021 18:03:35 +0530 Message-ID: <20210811123336.31357-5-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210811123336.31357-1-kishon@ti.com> References: <20210811123336.31357-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org AM64 has the same PCIe IP as in J7200 with certain erratas not applicable (quirk_detect_quiet_flag). Add support for "ti,am64-pcie-host" compatible and "ti,am64-pcie-ep" compatible that is specific to AM64. Signed-off-by: Kishon Vijay Abraham I --- drivers/pci/controller/cadence/pci-j721e.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c index 10b13b728284..ffb176d288cd 100644 --- a/drivers/pci/controller/cadence/pci-j721e.c +++ b/drivers/pci/controller/cadence/pci-j721e.c @@ -310,6 +310,17 @@ static const struct j721e_pcie_data j7200_pcie_ep_data = { .quirk_detect_quiet_flag = true, }; +static const struct j721e_pcie_data am64_pcie_rc_data = { + .mode = PCI_MODE_RC, + .linkdown_irq_regfield = J7200_LINK_DOWN, + .byte_access_allowed = true, +}; + +static const struct j721e_pcie_data am64_pcie_ep_data = { + .mode = PCI_MODE_EP, + .linkdown_irq_regfield = J7200_LINK_DOWN, +}; + static const struct of_device_id of_j721e_pcie_match[] = { { .compatible = "ti,j721e-pcie-host", @@ -327,6 +338,14 @@ static const struct of_device_id of_j721e_pcie_match[] = { .compatible = "ti,j7200-pcie-ep", .data = &j7200_pcie_ep_data, }, + { + .compatible = "ti,am64-pcie-host", + .data = &am64_pcie_rc_data, + }, + { + .compatible = "ti,am64-pcie-ep", + .data = &am64_pcie_ep_data, + }, {}, }; From patchwork Wed Aug 11 12:33:36 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 12431153 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BA185C432BE for ; Wed, 11 Aug 2021 12:34:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 93DD760FE6 for ; Wed, 11 Aug 2021 12:34:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230018AbhHKMez (ORCPT ); Wed, 11 Aug 2021 08:34:55 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:52902 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230147AbhHKMem (ORCPT ); Wed, 11 Aug 2021 08:34:42 -0400 Received: from lelv0266.itg.ti.com ([10.180.67.225]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 17BCY7qf014955; Wed, 11 Aug 2021 07:34:07 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1628685247; bh=Oa1S8qB/PRxyH2mC6vokWhg+TI1IxQrstcTNjr3DqD0=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=XdaYXgvjWC12TAmsmkpSy6x5hWwCcX1RBNvbUXYnH5bHE8/4GHMg7cuDsMbEDxAob jtpZIZFfG8s4vHRRMXVKp2ieFDgSj/LQcwgrmAggVOykH4bwAHZZ64T8A/m2dK0mm/ R5UZzmodadC35cjuQFf7vr99I2/Iv1LbntEm6K/w= Received: from DFLE100.ent.ti.com (dfle100.ent.ti.com [10.64.6.21]) by lelv0266.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 17BCY7la060779 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 11 Aug 2021 07:34:07 -0500 Received: from DFLE110.ent.ti.com (10.64.6.31) by DFLE100.ent.ti.com (10.64.6.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Wed, 11 Aug 2021 07:34:07 -0500 Received: from lelv0326.itg.ti.com (10.180.67.84) by DFLE110.ent.ti.com (10.64.6.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2 via Frontend Transport; Wed, 11 Aug 2021 07:34:07 -0500 Received: from a0393678-ssd.dal.design.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0326.itg.ti.com (8.15.2/8.15.2) with ESMTP id 17BCXbj1083813; Wed, 11 Aug 2021 07:34:02 -0500 From: Kishon Vijay Abraham I To: Lorenzo Pieralisi , Arnd Bergmann , Rob Herring , Bjorn Helgaas CC: Lokesh Vutla , , Greg Kroah-Hartman , Tom Joseph , , , , , Subject: [PATCH v3 5/5] misc: pci_endpoint_test: Add deviceID for AM64 and J7200 Date: Wed, 11 Aug 2021 18:03:36 +0530 Message-ID: <20210811123336.31357-6-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210811123336.31357-1-kishon@ti.com> References: <20210811123336.31357-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org Add device ID specific to AM64 and J7200 in pci_endpoint_test so that endpoints configured with those deviceIDs can use pci_endpoint_test driver. Signed-off-by: Kishon Vijay Abraham I --- drivers/misc/pci_endpoint_test.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c index c7ee34013485..8811a98fa9ab 100644 --- a/drivers/misc/pci_endpoint_test.c +++ b/drivers/misc/pci_endpoint_test.c @@ -69,6 +69,8 @@ #define FLAG_USE_DMA BIT(0) #define PCI_DEVICE_ID_TI_AM654 0xb00c +#define PCI_DEVICE_ID_TI_J7200 0xb00f +#define PCI_DEVICE_ID_TI_AM64 0xb010 #define PCI_DEVICE_ID_LS1088A 0x80c0 #define is_am654_pci_dev(pdev) \ @@ -969,6 +971,12 @@ static const struct pci_device_id pci_endpoint_test_tbl[] = { { PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_J721E), .driver_data = (kernel_ulong_t)&j721e_data, }, + { PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_J7200), + .driver_data = (kernel_ulong_t)&j721e_data, + }, + { PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_AM64), + .driver_data = (kernel_ulong_t)&j721e_data, + }, { } }; MODULE_DEVICE_TABLE(pci, pci_endpoint_test_tbl);