From patchwork Wed Oct 1 20:46:13 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ashwin Chaugule X-Patchwork-Id: 5014461 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 00C3E9F32B for ; Wed, 1 Oct 2014 20:46:30 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E996A20165 for ; Wed, 1 Oct 2014 20:46:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C6F5A2015D for ; Wed, 1 Oct 2014 20:46:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751005AbaJAUq0 (ORCPT ); Wed, 1 Oct 2014 16:46:26 -0400 Received: from mail-yk0-f177.google.com ([209.85.160.177]:58190 "EHLO mail-yk0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751300AbaJAUq0 (ORCPT ); Wed, 1 Oct 2014 16:46:26 -0400 Received: by mail-yk0-f177.google.com with SMTP id q200so381016ykb.36 for ; Wed, 01 Oct 2014 13:46:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=xDX0DVNrhsC5LF/pv3y9Pvseqn0eBXahSGGkeg0u/zk=; b=kMz7C4z0vS5ToqcjCMDXuVg3XrzrtuZgcitSfqcBGNe7y6HWsP7kXayxXb8hOCCJjg 3qdzHmyb6RLm8I4yP/qEl3Wlxy5Q7cw8ctmhlpXWg2mISw6Tw5Lv4flh4S0edEhV4L/7 B6mLKREEwl/s7Pv1LusW/bf3fYgwI7DsNwMwMrz0IOC1BwTYNZD89/F15iufw0TtesPM lxTxGD1ndwyvmDSHAdr5CULcBTMtFSP5KApfRH4IpptAzoVdsUI3ViPoRlCpC3trrm6B OBa3CwTwvZdLkOjLSkVQQxkm4k88GVPI13zvC900hGErnm3PmXi1VFPfbnk7pTm3CKC0 7M3A== X-Gm-Message-State: ALoCoQmacawyScpoXRvQdGf5qgQCGlTyQJomq0BFjUkX9lP3q7e6szireX6o6YHS18eFI4l6H8tf X-Received: by 10.236.124.143 with SMTP id x15mr78761801yhh.67.1412196385659; Wed, 01 Oct 2014 13:46:25 -0700 (PDT) Received: from localhost.localdomain (cpe-098-027-049-158.nc.res.rr.com. [98.27.49.158]) by mx.google.com with ESMTPSA id g22sm777744yhb.18.2014.10.01.13.46.23 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 01 Oct 2014 13:46:24 -0700 (PDT) From: Ashwin Chaugule To: broonie@kernel.org Cc: lv.zheng@intel.com, linaro-acpi@lists.linaro.org, patches@linaro.org, linux-acpi@vger.kernel.org, rjw@rjwysocki.net, arnd@arndb.de, Ashwin Chaugule Subject: [PATCH v8 2/2] PCC test Date: Wed, 1 Oct 2014 16:46:13 -0400 Message-Id: <1412196373-7794-3-git-send-email-ashwin.chaugule@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1412196373-7794-1-git-send-email-ashwin.chaugule@linaro.org> References: <1412196373-7794-1-git-send-email-ashwin.chaugule@linaro.org> Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Not for upstreaming. This is only to show how the PCC driver was tested. echo 2 > /proc/pcc_test [ to get the PCC base address from the PCCT ] echo 1 > /proc/pcc_test [ to trigger a PCC write ] echo 0 > /proc/pcc_test [ to trigger a PCC read ] dmesg shows the output. Signed-off-by: Ashwin Chaugule --- drivers/mailbox/Makefile | 2 +- drivers/mailbox/pcc-test.c | 204 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 205 insertions(+), 1 deletion(-) create mode 100644 drivers/mailbox/pcc-test.c diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index 0b09d6f..028b8b1 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -10,4 +10,4 @@ mailbox_omap1-objs := mailbox-omap1.o obj-$(CONFIG_OMAP2PLUS_MBOX) += mailbox_omap2.o mailbox_omap2-objs := mailbox-omap2.o -obj-$(CONFIG_PCC) += pcc.o +obj-$(CONFIG_PCC) += pcc.o pcc-test.o diff --git a/drivers/mailbox/pcc-test.c b/drivers/mailbox/pcc-test.c new file mode 100644 index 0000000..5faa255 --- /dev/null +++ b/drivers/mailbox/pcc-test.c @@ -0,0 +1,204 @@ +/* + * Copyright (C) 2014 Linaro Ltd. + * Author: Ashwin Chaugule + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +static void __iomem *comm_base_addr; /* For use after ioremap */ + +extern struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *, unsigned int); +extern int mbox_send_message(struct mbox_chan *chan, void *mssg); + +/* XXX: The PCC Subspace id is hard coded here only for test purposes. + * In reality it should be parsed from the PCC package as described + * in the PCC client table. e.g. CPC for CPPC + */ +#define PCC_SUBSPACE_IDX 0 +#define CMD_COMPLETE 1 + +struct mbox_chan *pcc_test_chan; +enum ppc_cmds { + CMD_READ, + CMD_WRITE, + RESERVED, +}; + +static u64 reg1, reg2; + +static void run_pcc_test_read(void) +{ + u64 reg1_addr = (u64)comm_base_addr + 0x100; + u64 reg2_addr = (u64)comm_base_addr + 0x110; + u16 cmd = CMD_READ; + int ret; + + /* READ part of the test */ + pr_info("Sending PCC read req from Channel base addr: %llx\n", (u64)comm_base_addr); + ret = mbox_send_message(pcc_test_chan, &cmd); + if (ret >= 0) { + pr_info("Read updated values from Platform.\n"); + reg1 = readq((void*)reg1_addr); + reg2 = readq((void*)reg2_addr); + pr_info("updated value of reg1:%llx\n", reg1); + pr_info("updated value of reg2:%llx\n", reg2); + } else + pr_err("Failed to read PCC parameters: ret=%d\n", ret); +} + +static void run_pcc_test_write(void) +{ + u64 reg1_addr = (u64)comm_base_addr + 0x100; + u64 reg2_addr = (u64)comm_base_addr + 0x110; + u16 cmd = CMD_WRITE; + int ret; + + /* WRITE part of the test */ + reg1++; + reg2++; + + writeq(reg1, (void *)reg1_addr); + writeq(reg2, (void *)reg2_addr); + + pr_info("Sending PCC write req from Channel base addr: %llx\n", (u64)comm_base_addr); + ret = mbox_send_message(pcc_test_chan, &cmd); + + if (ret >= 0) + pr_info("OSPM successfully sent PCC write cmd to platform\n"); + else + pr_err("Failed to write PCC parameters. ret= %d\n", ret); +} + +static void pcc_chan_tx_done(struct mbox_client *cl, void *mssg, int ret) +{ + if (!ret) + pr_info("PCC channel TX successfully completed. CMD sent = %x\n", *(u16*)mssg); + else + pr_warn("PCC channel TX did not complete: CMD sent = %x\n", *(u16*)mssg); +} + +struct mbox_client pcc_mbox_cl = { + .tx_done = pcc_chan_tx_done, + .tx_block = true, + .tx_tout = 10, +}; + +void get_pcc_comm(void) +{ + u64 base_addr; + u32 len; + struct acpi_pcct_subspace *pcc_ss; + + pcc_test_chan = pcc_mbox_request_channel(&pcc_mbox_cl, PCC_SUBSPACE_IDX); + + if (!pcc_test_chan) { + pr_err("PCC Channel not found!\n"); + return; + } + + pcc_ss = pcc_test_chan->con_priv; + + base_addr = pcc_ss->base_address; + len = pcc_ss->length; + + pr_info("ioremapping: %llx, len: %x\n", base_addr, len); + +// comm_base_addr = ioremap_nocache(base_addr, len); + /* HACK to test PCC commands */ + comm_base_addr = kzalloc(PAGE_SIZE, GFP_KERNEL); + + if (!comm_base_addr) { + pr_err("Could not ioremap channel\n"); + return; + } + + pcc_ss->base_address = (u64)comm_base_addr; + + pr_info("Comm_base_addr: %llx\n", (u64)comm_base_addr); +} + +static ssize_t pcc_test_write(struct file *file, const char __user *buf, + size_t count, loff_t *offs) +{ + char ctl[2]; + + if (count != 2 || *offs) + return -EINVAL; + + if (copy_from_user(ctl, buf, count)) + return -EFAULT; + + switch (ctl[0]) { + case '0': + /* PCC read */ + run_pcc_test_read(); + break; + case '1': + /* PCC write */ + run_pcc_test_write(); + break; + case '2': + /* Get PCC channel */ + get_pcc_comm(); + break; + default: + pr_err("Unknown val\n"); + break; + } + + return count; +} + +static int pcc_test_open(struct inode *inode, struct file *filp) +{ + return 0; +} + +static int pcc_test_release(struct inode *inode, struct file *filp) +{ + return 0; +} + +static const struct file_operations pcc_test_fops = { + .open = pcc_test_open, +// .read = seq_read, + .write = pcc_test_write, + .release = pcc_test_release, +}; + +static int __init pcc_test(void) +{ + struct proc_dir_entry *pe; + + pe = proc_create("pcc_test", 0644, NULL, &pcc_test_fops); + + if (!pe) + return -ENOMEM; + + return 0; +} + +late_initcall(pcc_test);