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[98.27.49.158]) by mx.google.com with ESMTPSA id p27sm7661072yhd.1.2014.09.03.12.39.13 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 03 Sep 2014 12:39:14 -0700 (PDT) From: Ashwin Chaugule To: arnd@arndb.de Cc: linux-acpi@vger.kernel.org, linaro-acpi@lists.linaro.org, rjw@rjwysocki.net, broonie@kernel.org, Ashwin Chaugule Subject: [PATCH v4 4/4] PCC test Date: Wed, 3 Sep 2014 15:38:59 -0400 Message-Id: <1409773139-10356-5-git-send-email-ashwin.chaugule@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1409773139-10356-1-git-send-email-ashwin.chaugule@linaro.org> References: <1409773139-10356-1-git-send-email-ashwin.chaugule@linaro.org> Sender: linux-acpi-owner@vger.kernel.org Precedence: list List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: ashwin.chaugule@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.220.169 as permitted sender) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , 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 | 208 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 209 insertions(+), 1 deletion(-) create mode 100644 drivers/mailbox/pcc-test.c diff --git a/drivers/mailbox/Makefile b/drivers/mailbox/Makefile index e746e26..cd3f263 100644 --- a/drivers/mailbox/Makefile +++ b/drivers/mailbox/Makefile @@ -12,4 +12,4 @@ mailbox_omap2-objs := mailbox-omap2.o obj-$(CONFIG_PCC_MAILBOX_API) += pcc_mailbox.o -obj-$(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..0425711 --- /dev/null +++ b/drivers/mailbox/pcc-test.c @@ -0,0 +1,208 @@ +/* + * 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 int pcc_mbox_controller_register(struct mbox_controller *mbox); +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; + char mssg[2]; + int ret; + + /* READ part of the test */ + pr_info("Sending PCC read req from Channel base addr: %llx\n", (u64)comm_base_addr); + + snprintf(mssg, sizeof(short), "%d", CMD_READ); + ret = mbox_send_message(pcc_test_chan, &mssg); + 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; + char mssg[2]; + 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); + snprintf(mssg, sizeof(short), "%d", CMD_WRITE); + + ret = mbox_send_message(pcc_test_chan, &mssg); + + 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 = %s\n", (char*)mssg); + else + pr_warn("PCC channel TX did not complete: CMD sent = %s\n", (char*)mssg); +} + +struct mbox_client pcc_mbox_cl = { + .tx_done = pcc_chan_tx_done, +}; + +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);