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V" , "Oliver O'Halloran" , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Frederic Barrat , Andrew Donnellan , Arnd Bergmann , Greg Kroah-Hartman , Dan Williams , 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=20Le=20Goater?= , Anju T Sudhakar , Hari Bathini , Thomas Gleixner , Greg Kurz , Nicholas Piggin , Masahiro Yamada , Alexey Kardashevskiy , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-nvdimm@lists.01.org, linux-mm@kvack.org Subject: [PATCH v4 03/25] powerpc/powernv: Map & release OpenCAPI LPC memory Date: Fri, 27 Mar 2020 18:11:40 +1100 Message-Id: <20200327071202.2159885-4-alastair@d-silva.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200327071202.2159885-1-alastair@d-silva.org> References: <20200327071202.2159885-1-alastair@d-silva.org> MIME-Version: 1.0 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mail2.nmnhosting.com [10.0.1.20]); Fri, 27 Mar 2020 18:12:14 +1100 (AEDT) Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This patch adds OPAL calls to powernv so that the OpenCAPI driver can map & release LPC (Lowest Point of Coherency) memory. Signed-off-by: Alastair D'Silva Reviewed-by: Andrew Donnellan --- arch/powerpc/include/asm/pnv-ocxl.h | 2 ++ arch/powerpc/platforms/powernv/ocxl.c | 43 +++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) diff --git a/arch/powerpc/include/asm/pnv-ocxl.h b/arch/powerpc/include/a= sm/pnv-ocxl.h index 7de82647e761..560a19bb71b7 100644 --- a/arch/powerpc/include/asm/pnv-ocxl.h +++ b/arch/powerpc/include/asm/pnv-ocxl.h @@ -32,5 +32,7 @@ extern int pnv_ocxl_spa_remove_pe_from_cache(void *plat= form_data, int pe_handle) =20 extern int pnv_ocxl_alloc_xive_irq(u32 *irq, u64 *trigger_addr); extern void pnv_ocxl_free_xive_irq(u32 irq); +u64 pnv_ocxl_platform_lpc_setup(struct pci_dev *pdev, u64 size); +void pnv_ocxl_platform_lpc_release(struct pci_dev *pdev); =20 #endif /* _ASM_PNV_OCXL_H */ diff --git a/arch/powerpc/platforms/powernv/ocxl.c b/arch/powerpc/platfor= ms/powernv/ocxl.c index 8c65aacda9c8..f13119a7c026 100644 --- a/arch/powerpc/platforms/powernv/ocxl.c +++ b/arch/powerpc/platforms/powernv/ocxl.c @@ -475,6 +475,49 @@ void pnv_ocxl_spa_release(void *platform_data) } EXPORT_SYMBOL_GPL(pnv_ocxl_spa_release); =20 +u64 pnv_ocxl_platform_lpc_setup(struct pci_dev *pdev, u64 size) +{ + struct pci_controller *hose =3D pci_bus_to_host(pdev->bus); + struct pnv_phb *phb =3D hose->private_data; + u32 bdfn =3D pci_dev_id(pdev); + __be64 base_addr_be64; + u64 base_addr; + int rc; + + rc =3D opal_npu_mem_alloc(phb->opal_id, bdfn, size, &base_addr_be64); + if (rc) { + dev_warn(&pdev->dev, + "OPAL could not allocate LPC memory, rc=3D%d\n", rc); + return 0; + } + + base_addr =3D be64_to_cpu(base_addr_be64); + +#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE + rc =3D check_hotplug_memory_addressable(base_addr >> PAGE_SHIFT, + size >> PAGE_SHIFT); + if (rc) + return 0; +#endif + + return base_addr; +} +EXPORT_SYMBOL_GPL(pnv_ocxl_platform_lpc_setup); + +void pnv_ocxl_platform_lpc_release(struct pci_dev *pdev) +{ + struct pci_controller *hose =3D pci_bus_to_host(pdev->bus); + struct pnv_phb *phb =3D hose->private_data; + u32 bdfn =3D pci_dev_id(pdev); + int rc; + + rc =3D opal_npu_mem_release(phb->opal_id, bdfn); + if (rc) + dev_warn(&pdev->dev, + "OPAL reported rc=3D%d when releasing LPC memory\n", rc); +} +EXPORT_SYMBOL_GPL(pnv_ocxl_platform_lpc_release); + int pnv_ocxl_spa_remove_pe_from_cache(void *platform_data, int pe_handle= ) { struct spa_data *data =3D (struct spa_data *) platform_data; --=20 2.24.1