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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 EA654C2D0E7 for ; Wed, 1 Apr 2020 08:48:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BF73021775 for ; Wed, 1 Apr 2020 08:48:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=intel-com.20150623.gappssmtp.com header.i=@intel-com.20150623.gappssmtp.com header.b="1NQnvn8m" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731847AbgDAIsR (ORCPT ); Wed, 1 Apr 2020 04:48:17 -0400 Received: from mail-ed1-f66.google.com ([209.85.208.66]:37323 "EHLO mail-ed1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726536AbgDAIsR (ORCPT ); Wed, 1 Apr 2020 04:48:17 -0400 Received: by mail-ed1-f66.google.com with SMTP id de14so28676456edb.4 for ; Wed, 01 Apr 2020 01:48:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=intel-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=AtwLbCqmqvz42BIBfrvBd67JNfGvzVf9CtVg6xG0MDo=; b=1NQnvn8mdX9DuQU55yHb6kM7GOE2cZXTLfXFTFxLhUegcVz4S1+s3ZBa57yNaFgaL3 Of91mzhfbjU3BHyMXm/x0yEhWTDO4TAOYRaNkO6T/LWY+pOTfeJwuvMM0Q/2Rk8OpA6d zFut98XrtA7J3P7P5yZ9wWZX1Gipxb4iC8phf5nmrtY6ZT+vPhTZtKBXAjVkEzVudyB2 Hwz+whcmlJFAQ+A7PQcCxI9lhP5nffN9YpWYUM+Yg9pko1uKyCswbkhh+OOE189UCQGC mCDxtwyiXRmrVvL9V5gXcvmE1Qs1WIfL7JJwQvOCX/zR4/bV+SuAmYsH06eTMp1FGEL9 05GA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=AtwLbCqmqvz42BIBfrvBd67JNfGvzVf9CtVg6xG0MDo=; b=X2wn5sKAoA6lIKn+D1cdYq8Z+UOTj8gGWhVsjaIYvvX8s+yjHi2gS8gtcHUwyNM2gF HEMIpfjbd9tDjD8gCmXuKuIcaT/BwiOSoZ24bxJCmT/dMbCSZ7w3A2xNrc/ju8rtU79Y xAZNoCE1uQTsJzYm+hank3pcDGTv8hqL2iMXunS0hv4BqwRjGGrwuaC0gOP5LI3gpKyk pKdv6bN6wnJbeYIcEEEYetK277DgoQSRxMIQm2dA5p7XHvWZiKbIzgUX1X01Pe/htmRN Vb1cQJma4oYK+0n9S+4kdp54cdGOYkP+7c94Ehjac2pVQXuxDFehc9MKY97B7yWAvaV8 7zyQ== X-Gm-Message-State: ANhLgQ1Lllblm6hfcVfW6FdRPC7f6jRfZfSDT4NhvWy6byfcF/IkLP4d I4+Z22PIQdyuqhqHkJga8VIqTV00aGhbt0xB3ADqVQ== X-Google-Smtp-Source: ADFU+vuJwhmchfCPkTtH5Ynz0giXt5bXNBUEx5wVctahGqCgUow/QrKV4szBeXwU2Z8TB249fauEQ8jxV+fGCd1JPZA= X-Received: by 2002:a05:6402:1c8b:: with SMTP id cy11mr7881800edb.102.1585730894443; Wed, 01 Apr 2020 01:48:14 -0700 (PDT) MIME-Version: 1.0 References: <20200327071202.2159885-1-alastair@d-silva.org> <20200327071202.2159885-2-alastair@d-silva.org> In-Reply-To: <20200327071202.2159885-2-alastair@d-silva.org> From: Dan Williams Date: Wed, 1 Apr 2020 01:48:03 -0700 Message-ID: Subject: Re: [PATCH v4 01/25] powerpc/powernv: Add OPAL calls for LPC memory alloc/release To: "Alastair D'Silva" Cc: "Aneesh Kumar K . V" , "Oliver O'Halloran" , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Frederic Barrat , Andrew Donnellan , Arnd Bergmann , Greg Kroah-Hartman , Vishal Verma , Dave Jiang , Ira Weiny , Andrew Morton , Mauro Carvalho Chehab , "David S. Miller" , Rob Herring , Anton Blanchard , Krzysztof Kozlowski , Mahesh Salgaonkar , Madhavan Srinivasan , =?UTF-8?Q?C=C3=A9dric_Le_Goater?= , Anju T Sudhakar , Hari Bathini , Thomas Gleixner , Greg Kurz , Nicholas Piggin , Masahiro Yamada , Alexey Kardashevskiy , Linux Kernel Mailing List , linuxppc-dev , linux-nvdimm , Linux MM Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Mar 29, 2020 at 10:23 PM Alastair D'Silva wrote: > > Add OPAL calls for LPC memory alloc/release > This seems to be referencing an existing api definition, can you include a pointer to the spec in case someone wanted to understand what these routines do? I suspect this is not allocating memory in the traditional sense as much as it's allocating physical address space for a device to be mapped? > Signed-off-by: Alastair D'Silva > Acked-by: Andrew Donnellan > Acked-by: Frederic Barrat > --- > arch/powerpc/include/asm/opal-api.h | 2 ++ > arch/powerpc/include/asm/opal.h | 2 ++ > arch/powerpc/platforms/powernv/opal-call.c | 2 ++ > 3 files changed, 6 insertions(+) > > diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h > index c1f25a760eb1..9298e603001b 100644 > --- a/arch/powerpc/include/asm/opal-api.h > +++ b/arch/powerpc/include/asm/opal-api.h > @@ -208,6 +208,8 @@ > #define OPAL_HANDLE_HMI2 166 > #define OPAL_NX_COPROC_INIT 167 > #define OPAL_XIVE_GET_VP_STATE 170 > +#define OPAL_NPU_MEM_ALLOC 171 > +#define OPAL_NPU_MEM_RELEASE 172 > #define OPAL_MPIPL_UPDATE 173 > #define OPAL_MPIPL_REGISTER_TAG 174 > #define OPAL_MPIPL_QUERY_TAG 175 > diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h > index 9986ac34b8e2..301fea46c7ca 100644 > --- a/arch/powerpc/include/asm/opal.h > +++ b/arch/powerpc/include/asm/opal.h > @@ -39,6 +39,8 @@ int64_t opal_npu_spa_clear_cache(uint64_t phb_id, uint32_t bdfn, > uint64_t PE_handle); > int64_t opal_npu_tl_set(uint64_t phb_id, uint32_t bdfn, long cap, > uint64_t rate_phys, uint32_t size); > +int64_t opal_npu_mem_alloc(u64 phb_id, u32 bdfn, u64 size, __be64 *bar); > +int64_t opal_npu_mem_release(u64 phb_id, u32 bdfn); > > int64_t opal_console_write(int64_t term_number, __be64 *length, > const uint8_t *buffer); > diff --git a/arch/powerpc/platforms/powernv/opal-call.c b/arch/powerpc/platforms/powernv/opal-call.c > index 5cd0f52d258f..f26e58b72c04 100644 > --- a/arch/powerpc/platforms/powernv/opal-call.c > +++ b/arch/powerpc/platforms/powernv/opal-call.c > @@ -287,6 +287,8 @@ OPAL_CALL(opal_pci_set_pbcq_tunnel_bar, OPAL_PCI_SET_PBCQ_TUNNEL_BAR); > OPAL_CALL(opal_sensor_read_u64, OPAL_SENSOR_READ_U64); > OPAL_CALL(opal_sensor_group_enable, OPAL_SENSOR_GROUP_ENABLE); > OPAL_CALL(opal_nx_coproc_init, OPAL_NX_COPROC_INIT); > +OPAL_CALL(opal_npu_mem_alloc, OPAL_NPU_MEM_ALLOC); > +OPAL_CALL(opal_npu_mem_release, OPAL_NPU_MEM_RELEASE); > OPAL_CALL(opal_mpipl_update, OPAL_MPIPL_UPDATE); > OPAL_CALL(opal_mpipl_register_tag, OPAL_MPIPL_REGISTER_TAG); > OPAL_CALL(opal_mpipl_query_tag, OPAL_MPIPL_QUERY_TAG); > -- > 2.24.1 >