From patchwork Sun Sep 1 16:16:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fredrik Noring X-Patchwork-Id: 11125483 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0D2271399 for ; Sun, 1 Sep 2019 16:16:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E97C9233A2 for ; Sun, 1 Sep 2019 16:16:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728863AbfIAQQZ (ORCPT ); Sun, 1 Sep 2019 12:16:25 -0400 Received: from pio-pvt-msa3.bahnhof.se ([79.136.2.42]:43984 "EHLO pio-pvt-msa3.bahnhof.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728848AbfIAQQZ (ORCPT ); Sun, 1 Sep 2019 12:16:25 -0400 Received: from localhost (localhost [127.0.0.1]) by pio-pvt-msa3.bahnhof.se (Postfix) with ESMTP id D28733F63C for ; Sun, 1 Sep 2019 18:16:22 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at bahnhof.se X-Spam-Flag: NO X-Spam-Score: -1.899 X-Spam-Level: X-Spam-Status: No, score=-1.899 tagged_above=-999 required=6.31 tests=[BAYES_00=-1.9, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no Received: from pio-pvt-msa3.bahnhof.se ([127.0.0.1]) by localhost (pio-pvt-msa3.bahnhof.se [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sqZkzGQXo5OL for ; Sun, 1 Sep 2019 18:16:22 +0200 (CEST) Received: from localhost (h-41-252.A163.priv.bahnhof.se [46.59.41.252]) (Authenticated sender: mb547485) by pio-pvt-msa3.bahnhof.se (Postfix) with ESMTPA id 292CD3F58C for ; Sun, 1 Sep 2019 18:16:22 +0200 (CEST) Date: Sun, 1 Sep 2019 18:16:21 +0200 From: Fredrik Noring To: linux-mips@vger.kernel.org Subject: [PATCH 073/120] MIPS: PS2: IOP: Heap memory allocate and free Message-ID: References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org The IOP heap memory operations are serviced by an IOP module linked from read-only memory (ROM). Signed-off-by: Fredrik Noring --- arch/mips/include/asm/mach-ps2/iop-heap.h | 19 +++++ drivers/ps2/Makefile | 1 + drivers/ps2/iop-heap.c | 90 +++++++++++++++++++++++ 3 files changed, 110 insertions(+) create mode 100644 arch/mips/include/asm/mach-ps2/iop-heap.h create mode 100644 drivers/ps2/iop-heap.c diff --git a/arch/mips/include/asm/mach-ps2/iop-heap.h b/arch/mips/include/asm/mach-ps2/iop-heap.h new file mode 100644 index 000000000000..ee96e2ffba83 --- /dev/null +++ b/arch/mips/include/asm/mach-ps2/iop-heap.h @@ -0,0 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PlayStation 2 input/output processor (IOP) heap memory + * + * Copyright (C) 2019 Fredrik Noring + */ + +#ifndef __ASM_MACH_PS2_IOP_HEAP_H +#define __ASM_MACH_PS2_IOP_HEAP_H + +#include + +#include + +iop_addr_t iop_alloc(size_t nbyte); + +int iop_free(iop_addr_t baddr); + +#endif /* __ASM_MACH_PS2_IOP_HEAP_H */ diff --git a/drivers/ps2/Makefile b/drivers/ps2/Makefile index b04e4d3c3374..02a5756cb059 100644 --- a/drivers/ps2/Makefile +++ b/drivers/ps2/Makefile @@ -1,3 +1,4 @@ +obj-m += iop-heap.o obj-m += iop-memory.o obj-m += iop-module.o obj-m += iop-registers.o diff --git a/drivers/ps2/iop-heap.c b/drivers/ps2/iop-heap.c new file mode 100644 index 000000000000..f803401f59e5 --- /dev/null +++ b/drivers/ps2/iop-heap.c @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PlayStation 2 input/output processor (IOP) heap memory + * + * Copyright (C) 2019 Fredrik Noring + */ + +#include +#include +#include + +#include +#include +#include + +/** + * enum iop_heap_rpc_ops - I/O processor (IOP) heap RPC operations + * @rpo_alloc: allocate IOP memory + * @rpo_free: free IOP memory + * @rpo_load: FIXME + */ +enum iop_heap_rpc_ops { + rpo_alloc = 1, + rpo_free = 2, + rpo_load = 3, +}; + +static struct sif_rpc_client iop_heap_rpc; + +/** + * iop_alloc - allocate IOP memory + * @nbyte: number of bytes to allocate + * + * Context: sleep + * Return: IOP address, or zero if the allocation failed + */ +iop_addr_t iop_alloc(size_t nbyte) +{ + const u32 size_arg = nbyte; + u32 iop_addr; + + if (size_arg != nbyte) + return 0; + + return sif_rpc(&iop_heap_rpc, rpo_alloc, + &size_arg, sizeof(size_arg), + &iop_addr, sizeof(iop_addr)) < 0 ? 0 : iop_addr; +} +EXPORT_SYMBOL(iop_alloc); + +/** + * iop_free - free previously allocated IOP memory + * @baddr: IOP address, or zero + * + * Context: sleep + * Return: 0 on success, otherwise a negative error number + */ +int iop_free(iop_addr_t baddr) +{ + const u32 addr_arg = baddr; + s32 status; + int err; + + if (!baddr) + return 0; + + err = sif_rpc(&iop_heap_rpc, rpo_free, + &addr_arg, sizeof(addr_arg), + &status, sizeof(status)); + + return err < 0 ? err : errno_for_iop_error(status); +} +EXPORT_SYMBOL(iop_free); + +static int __init iop_heap_init(void) +{ + return sif_rpc_bind(&iop_heap_rpc, SIF_SID_HEAP); +} + +static void __exit iop_heap_exit(void) +{ + sif_rpc_unbind(&iop_heap_rpc); +} + +module_init(iop_heap_init); +module_exit(iop_heap_exit); + +MODULE_DESCRIPTION("PlayStation 2 input/output processor (IOP) heap memory"); +MODULE_AUTHOR("Fredrik Noring"); +MODULE_LICENSE("GPL");