linux-kernel - Re: [PATCH 03/10] powerpc: Add OPAL calls for LPC memory alloc/release

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Date:   Thu, 7 Nov 2019 18:57:16 +0100
From:   Frederic Barrat <fbarrat@...ux.ibm.com>
To:     "Alastair D'Silva" <alastair@....ibm.com>, alastair@...ilva.org
Cc:     Andrew Donnellan <ajd@...ux.ibm.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Keith Busch <keith.busch@...el.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Anton Blanchard <anton@...abs.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vasant Hegde <hegdevasant@...ux.vnet.ibm.com>,
        Anju T Sudhakar <anju@...ux.vnet.ibm.com>,
        Hari Bathini <hbathini@...ux.ibm.com>,
        Mahesh Salgaonkar <mahesh@...ux.vnet.ibm.com>,
        Cédric Le Goater <clg@...d.org>,
        Allison Randal <allison@...utok.net>,
        Greg Kurz <groug@...d.org>,
        Nicholas Piggin <npiggin@...il.com>,
        David Gibson <david@...son.dropbear.id.au>,
        Alexey Kardashevskiy <aik@...abs.ru>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.com>,
        Michal Hocko <mhocko@...e.com>,
        Pavel Tatashin <pasha.tatashin@...een.com>,
        Wei Yang <richard.weiyang@...il.com>, Qian Cai <cai@....pw>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        linux-nvdimm@...ts.01.org, linux-mm@...ck.org
Subject: Re: [PATCH 03/10] powerpc: Add OPAL calls for LPC memory
 alloc/release



Le 25/10/2019 à 06:46, Alastair D'Silva a écrit :
> From: Alastair D'Silva <alastair@...ilva.org>
> 
> Add OPAL calls for LPC memory alloc/release
> 
> Signed-off-by: Alastair D'Silva <alastair@...ilva.org>
> Acked-by: Andrew Donnellan <ajd@...ux.ibm.com>
> ---


Acked-by: Frederic Barrat <fbarrat@...ux.ibm.com>



>   arch/powerpc/include/asm/opal-api.h        | 2 ++
>   arch/powerpc/include/asm/opal.h            | 3 +++
>   arch/powerpc/platforms/powernv/opal-call.c | 2 ++
>   3 files changed, 7 insertions(+)
> 
> diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h
> index 378e3997845a..2c88c02e69ed 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 a0cf8fba4d12..4db135fb54ab 100644
> --- a/arch/powerpc/include/asm/opal.h
> +++ b/arch/powerpc/include/asm/opal.h
> @@ -39,6 +39,9 @@ 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(uint64_t phb_id, uint32_t bdfn,
> +			uint64_t size, uint64_t *bar);
> +int64_t opal_npu_mem_release(uint64_t phb_id, uint32_t 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 a2aa5e433ac8..27c4b93c774c 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);
>