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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
![Nathan Chancellor](/assets/img/avatar_default.png)
Clang errors:
drivers/remoteproc/mtk_scp.c:364:14: error: incompatible function
pointer types initializing 'void *(*)(struct rproc *, u64, size_t)' (aka
'void *(*)(struct rproc *, unsigned long long, unsigned int)') with an
expression of type 'void *(struct rproc *, u64, int)' (aka 'void
*(struct rproc *, unsigned long long, int)')
[-Werror,-Wincompatible-function-pointer-types]
.da_to_va = scp_da_to_va,
^~~~~~~~~~~~
1 error generated.
Make the same change as commit 0fcbb369f052 ("remoteproc: Use size_t
type for len in da_to_va"), which was not updated for the acceptance of
commit 63c13d61ea
("remoteproc/mediatek: add SCP support for mt8183").
Fixes: 0fcbb369f052 ("remoteproc: Use size_t type for len in da_to_va")
Link: https://github.com/ClangBuiltLinux/linux/issues/927
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Link: https://lore.kernel.org/r/20200310211514.32288-1-natechancellor@gmail.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
663 lines
16 KiB
C
663 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// Copyright (c) 2019 MediaTek Inc.
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#include <asm/barrier.h>
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#include <linux/clk.h>
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#include <linux/dma-mapping.h>
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#include <linux/err.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of_address.h>
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#include <linux/of_platform.h>
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#include <linux/of_reserved_mem.h>
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#include <linux/platform_device.h>
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#include <linux/remoteproc.h>
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#include <linux/remoteproc/mtk_scp.h>
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#include <linux/rpmsg/mtk_rpmsg.h>
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#include "mtk_common.h"
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#include "remoteproc_internal.h"
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#define MAX_CODE_SIZE 0x500000
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#define SCP_FW_END 0x7C000
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/**
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* scp_get() - get a reference to SCP.
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*
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* @pdev: the platform device of the module requesting SCP platform
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* device for using SCP API.
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*
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* Return: Return NULL if failed. otherwise reference to SCP.
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**/
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struct mtk_scp *scp_get(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct device_node *scp_node;
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struct platform_device *scp_pdev;
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scp_node = of_parse_phandle(dev->of_node, "mediatek,scp", 0);
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if (!scp_node) {
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dev_err(dev, "can't get SCP node\n");
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return NULL;
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}
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scp_pdev = of_find_device_by_node(scp_node);
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of_node_put(scp_node);
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if (WARN_ON(!scp_pdev)) {
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dev_err(dev, "SCP pdev failed\n");
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return NULL;
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}
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return platform_get_drvdata(scp_pdev);
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}
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EXPORT_SYMBOL_GPL(scp_get);
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/**
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* scp_put() - "free" the SCP
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*
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* @scp: mtk_scp structure from scp_get().
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**/
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void scp_put(struct mtk_scp *scp)
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{
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put_device(scp->dev);
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}
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EXPORT_SYMBOL_GPL(scp_put);
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static void scp_wdt_handler(struct mtk_scp *scp, u32 scp_to_host)
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{
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dev_err(scp->dev, "SCP watchdog timeout! 0x%x", scp_to_host);
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rproc_report_crash(scp->rproc, RPROC_WATCHDOG);
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}
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static void scp_init_ipi_handler(void *data, unsigned int len, void *priv)
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{
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struct mtk_scp *scp = (struct mtk_scp *)priv;
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struct scp_run *run = (struct scp_run *)data;
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scp->run.signaled = run->signaled;
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strscpy(scp->run.fw_ver, run->fw_ver, SCP_FW_VER_LEN);
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scp->run.dec_capability = run->dec_capability;
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scp->run.enc_capability = run->enc_capability;
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wake_up_interruptible(&scp->run.wq);
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}
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static void scp_ipi_handler(struct mtk_scp *scp)
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{
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struct mtk_share_obj __iomem *rcv_obj = scp->recv_buf;
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struct scp_ipi_desc *ipi_desc = scp->ipi_desc;
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u8 tmp_data[SCP_SHARE_BUFFER_SIZE];
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scp_ipi_handler_t handler;
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u32 id = readl(&rcv_obj->id);
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u32 len = readl(&rcv_obj->len);
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if (len > SCP_SHARE_BUFFER_SIZE) {
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dev_err(scp->dev, "ipi message too long (len %d, max %d)", len,
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SCP_SHARE_BUFFER_SIZE);
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return;
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}
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if (id >= SCP_IPI_MAX) {
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dev_err(scp->dev, "No such ipi id = %d\n", id);
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return;
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}
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scp_ipi_lock(scp, id);
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handler = ipi_desc[id].handler;
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if (!handler) {
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dev_err(scp->dev, "No such ipi id = %d\n", id);
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scp_ipi_unlock(scp, id);
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return;
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}
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memcpy_fromio(tmp_data, &rcv_obj->share_buf, len);
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handler(tmp_data, len, ipi_desc[id].priv);
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scp_ipi_unlock(scp, id);
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scp->ipi_id_ack[id] = true;
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wake_up(&scp->ack_wq);
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}
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static int scp_ipi_init(struct mtk_scp *scp)
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{
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size_t send_offset = SCP_FW_END - sizeof(struct mtk_share_obj);
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size_t recv_offset = send_offset - sizeof(struct mtk_share_obj);
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/* Disable SCP to host interrupt */
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writel(MT8183_SCP_IPC_INT_BIT, scp->reg_base + MT8183_SCP_TO_HOST);
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/* shared buffer initialization */
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scp->recv_buf =
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(struct mtk_share_obj __iomem *)(scp->sram_base + recv_offset);
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scp->send_buf =
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(struct mtk_share_obj __iomem *)(scp->sram_base + send_offset);
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memset_io(scp->recv_buf, 0, sizeof(scp->recv_buf));
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memset_io(scp->send_buf, 0, sizeof(scp->send_buf));
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return 0;
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}
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static void scp_reset_assert(const struct mtk_scp *scp)
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{
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u32 val;
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val = readl(scp->reg_base + MT8183_SW_RSTN);
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val &= ~MT8183_SW_RSTN_BIT;
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writel(val, scp->reg_base + MT8183_SW_RSTN);
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}
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static void scp_reset_deassert(const struct mtk_scp *scp)
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{
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u32 val;
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val = readl(scp->reg_base + MT8183_SW_RSTN);
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val |= MT8183_SW_RSTN_BIT;
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writel(val, scp->reg_base + MT8183_SW_RSTN);
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}
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static irqreturn_t scp_irq_handler(int irq, void *priv)
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{
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struct mtk_scp *scp = priv;
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u32 scp_to_host;
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int ret;
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ret = clk_prepare_enable(scp->clk);
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if (ret) {
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dev_err(scp->dev, "failed to enable clocks\n");
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return IRQ_NONE;
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}
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scp_to_host = readl(scp->reg_base + MT8183_SCP_TO_HOST);
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if (scp_to_host & MT8183_SCP_IPC_INT_BIT)
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scp_ipi_handler(scp);
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else
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scp_wdt_handler(scp, scp_to_host);
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/* SCP won't send another interrupt until we set SCP_TO_HOST to 0. */
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writel(MT8183_SCP_IPC_INT_BIT | MT8183_SCP_WDT_INT_BIT,
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scp->reg_base + MT8183_SCP_TO_HOST);
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clk_disable_unprepare(scp->clk);
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return IRQ_HANDLED;
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}
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static int scp_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
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{
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struct device *dev = &rproc->dev;
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struct elf32_hdr *ehdr;
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struct elf32_phdr *phdr;
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int i, ret = 0;
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const u8 *elf_data = fw->data;
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ehdr = (struct elf32_hdr *)elf_data;
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phdr = (struct elf32_phdr *)(elf_data + ehdr->e_phoff);
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/* go through the available ELF segments */
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for (i = 0; i < ehdr->e_phnum; i++, phdr++) {
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u32 da = phdr->p_paddr;
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u32 memsz = phdr->p_memsz;
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u32 filesz = phdr->p_filesz;
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u32 offset = phdr->p_offset;
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void __iomem *ptr;
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if (phdr->p_type != PT_LOAD)
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continue;
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dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n",
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phdr->p_type, da, memsz, filesz);
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if (filesz > memsz) {
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dev_err(dev, "bad phdr filesz 0x%x memsz 0x%x\n",
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filesz, memsz);
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ret = -EINVAL;
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break;
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}
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if (offset + filesz > fw->size) {
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dev_err(dev, "truncated fw: need 0x%x avail 0x%zx\n",
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offset + filesz, fw->size);
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ret = -EINVAL;
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break;
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}
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/* grab the kernel address for this device address */
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ptr = (void __iomem *)rproc_da_to_va(rproc, da, memsz);
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if (!ptr) {
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dev_err(dev, "bad phdr da 0x%x mem 0x%x\n", da, memsz);
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ret = -EINVAL;
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break;
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}
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/* put the segment where the remote processor expects it */
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if (phdr->p_filesz)
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scp_memcpy_aligned(ptr, elf_data + phdr->p_offset,
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filesz);
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}
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return ret;
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}
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static int scp_load(struct rproc *rproc, const struct firmware *fw)
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{
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const struct mtk_scp *scp = rproc->priv;
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struct device *dev = scp->dev;
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int ret;
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ret = clk_prepare_enable(scp->clk);
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if (ret) {
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dev_err(dev, "failed to enable clocks\n");
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return ret;
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}
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/* Hold SCP in reset while loading FW. */
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scp_reset_assert(scp);
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/* Reset clocks before loading FW */
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writel(0x0, scp->reg_base + MT8183_SCP_CLK_SW_SEL);
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writel(0x0, scp->reg_base + MT8183_SCP_CLK_DIV_SEL);
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/* Initialize TCM before loading FW. */
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writel(0x0, scp->reg_base + MT8183_SCP_L1_SRAM_PD);
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writel(0x0, scp->reg_base + MT8183_SCP_TCM_TAIL_SRAM_PD);
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/* Turn on the power of SCP's SRAM before using it. */
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writel(0x0, scp->reg_base + MT8183_SCP_SRAM_PDN);
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/*
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* Set I-cache and D-cache size before loading SCP FW.
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* SCP SRAM logical address may change when cache size setting differs.
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*/
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writel(MT8183_SCP_CACHE_CON_WAYEN | MT8183_SCP_CACHESIZE_8KB,
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scp->reg_base + MT8183_SCP_CACHE_CON);
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writel(MT8183_SCP_CACHESIZE_8KB, scp->reg_base + MT8183_SCP_DCACHE_CON);
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ret = scp_elf_load_segments(rproc, fw);
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clk_disable_unprepare(scp->clk);
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return ret;
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}
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static int scp_start(struct rproc *rproc)
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{
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struct mtk_scp *scp = (struct mtk_scp *)rproc->priv;
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struct device *dev = scp->dev;
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struct scp_run *run = &scp->run;
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int ret;
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ret = clk_prepare_enable(scp->clk);
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if (ret) {
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dev_err(dev, "failed to enable clocks\n");
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return ret;
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}
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run->signaled = false;
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scp_reset_deassert(scp);
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ret = wait_event_interruptible_timeout(
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run->wq,
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run->signaled,
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msecs_to_jiffies(2000));
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if (ret == 0) {
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dev_err(dev, "wait SCP initialization timeout!\n");
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ret = -ETIME;
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goto stop;
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}
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if (ret == -ERESTARTSYS) {
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dev_err(dev, "wait SCP interrupted by a signal!\n");
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goto stop;
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}
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clk_disable_unprepare(scp->clk);
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dev_info(dev, "SCP is ready. FW version %s\n", run->fw_ver);
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return 0;
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stop:
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scp_reset_assert(scp);
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clk_disable_unprepare(scp->clk);
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return ret;
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}
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static void *scp_da_to_va(struct rproc *rproc, u64 da, size_t len)
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{
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struct mtk_scp *scp = (struct mtk_scp *)rproc->priv;
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int offset;
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if (da < scp->sram_size) {
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offset = da;
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if (offset >= 0 && (offset + len) < scp->sram_size)
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return (void __force *)scp->sram_base + offset;
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} else {
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offset = da - scp->phys_addr;
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if (offset >= 0 && (offset + len) < scp->dram_size)
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return (void __force *)scp->cpu_addr + offset;
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}
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return NULL;
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}
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static int scp_stop(struct rproc *rproc)
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{
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struct mtk_scp *scp = (struct mtk_scp *)rproc->priv;
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int ret;
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ret = clk_prepare_enable(scp->clk);
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if (ret) {
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dev_err(scp->dev, "failed to enable clocks\n");
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return ret;
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}
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scp_reset_assert(scp);
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/* Disable SCP watchdog */
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writel(0, scp->reg_base + MT8183_WDT_CFG);
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clk_disable_unprepare(scp->clk);
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return 0;
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}
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static const struct rproc_ops scp_ops = {
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.start = scp_start,
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.stop = scp_stop,
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.load = scp_load,
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.da_to_va = scp_da_to_va,
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};
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/**
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* scp_get_device() - get device struct of SCP
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*
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* @scp: mtk_scp structure
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**/
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struct device *scp_get_device(struct mtk_scp *scp)
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{
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return scp->dev;
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}
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EXPORT_SYMBOL_GPL(scp_get_device);
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/**
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* scp_get_rproc() - get rproc struct of SCP
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*
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* @scp: mtk_scp structure
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**/
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struct rproc *scp_get_rproc(struct mtk_scp *scp)
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{
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return scp->rproc;
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}
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EXPORT_SYMBOL_GPL(scp_get_rproc);
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/**
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* scp_get_vdec_hw_capa() - get video decoder hardware capability
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*
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* @scp: mtk_scp structure
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*
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* Return: video decoder hardware capability
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**/
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unsigned int scp_get_vdec_hw_capa(struct mtk_scp *scp)
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{
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return scp->run.dec_capability;
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}
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EXPORT_SYMBOL_GPL(scp_get_vdec_hw_capa);
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/**
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* scp_get_venc_hw_capa() - get video encoder hardware capability
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*
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* @scp: mtk_scp structure
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*
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* Return: video encoder hardware capability
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**/
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unsigned int scp_get_venc_hw_capa(struct mtk_scp *scp)
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{
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return scp->run.enc_capability;
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}
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EXPORT_SYMBOL_GPL(scp_get_venc_hw_capa);
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/**
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* scp_mapping_dm_addr() - Mapping SRAM/DRAM to kernel virtual address
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*
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* @scp: mtk_scp structure
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* @mem_addr: SCP views memory address
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*
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* Mapping the SCP's SRAM address /
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* DMEM (Data Extended Memory) memory address /
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* Working buffer memory address to
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* kernel virtual address.
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*
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* Return: Return ERR_PTR(-EINVAL) if mapping failed,
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* otherwise the mapped kernel virtual address
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**/
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void *scp_mapping_dm_addr(struct mtk_scp *scp, u32 mem_addr)
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{
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void *ptr;
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ptr = scp_da_to_va(scp->rproc, mem_addr, 0);
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if (!ptr)
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return ERR_PTR(-EINVAL);
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return ptr;
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}
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EXPORT_SYMBOL_GPL(scp_mapping_dm_addr);
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static int scp_map_memory_region(struct mtk_scp *scp)
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{
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int ret;
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ret = of_reserved_mem_device_init(scp->dev);
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if (ret) {
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dev_err(scp->dev, "failed to assign memory-region: %d\n", ret);
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return -ENOMEM;
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}
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/* Reserved SCP code size */
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scp->dram_size = MAX_CODE_SIZE;
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scp->cpu_addr = dma_alloc_coherent(scp->dev, scp->dram_size,
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&scp->phys_addr, GFP_KERNEL);
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if (!scp->cpu_addr)
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return -ENOMEM;
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return 0;
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}
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static void scp_unmap_memory_region(struct mtk_scp *scp)
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{
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dma_free_coherent(scp->dev, scp->dram_size, scp->cpu_addr,
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scp->phys_addr);
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of_reserved_mem_device_release(scp->dev);
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}
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static int scp_register_ipi(struct platform_device *pdev, u32 id,
|
|
ipi_handler_t handler, void *priv)
|
|
{
|
|
struct mtk_scp *scp = platform_get_drvdata(pdev);
|
|
|
|
return scp_ipi_register(scp, id, handler, priv);
|
|
}
|
|
|
|
static void scp_unregister_ipi(struct platform_device *pdev, u32 id)
|
|
{
|
|
struct mtk_scp *scp = platform_get_drvdata(pdev);
|
|
|
|
scp_ipi_unregister(scp, id);
|
|
}
|
|
|
|
static int scp_send_ipi(struct platform_device *pdev, u32 id, void *buf,
|
|
unsigned int len, unsigned int wait)
|
|
{
|
|
struct mtk_scp *scp = platform_get_drvdata(pdev);
|
|
|
|
return scp_ipi_send(scp, id, buf, len, wait);
|
|
}
|
|
|
|
static struct mtk_rpmsg_info mtk_scp_rpmsg_info = {
|
|
.send_ipi = scp_send_ipi,
|
|
.register_ipi = scp_register_ipi,
|
|
.unregister_ipi = scp_unregister_ipi,
|
|
.ns_ipi_id = SCP_IPI_NS_SERVICE,
|
|
};
|
|
|
|
static void scp_add_rpmsg_subdev(struct mtk_scp *scp)
|
|
{
|
|
scp->rpmsg_subdev =
|
|
mtk_rpmsg_create_rproc_subdev(to_platform_device(scp->dev),
|
|
&mtk_scp_rpmsg_info);
|
|
if (scp->rpmsg_subdev)
|
|
rproc_add_subdev(scp->rproc, scp->rpmsg_subdev);
|
|
}
|
|
|
|
static void scp_remove_rpmsg_subdev(struct mtk_scp *scp)
|
|
{
|
|
if (scp->rpmsg_subdev) {
|
|
rproc_remove_subdev(scp->rproc, scp->rpmsg_subdev);
|
|
mtk_rpmsg_destroy_rproc_subdev(scp->rpmsg_subdev);
|
|
scp->rpmsg_subdev = NULL;
|
|
}
|
|
}
|
|
|
|
static int scp_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct device_node *np = dev->of_node;
|
|
struct mtk_scp *scp;
|
|
struct rproc *rproc;
|
|
struct resource *res;
|
|
char *fw_name = "scp.img";
|
|
int ret, i;
|
|
|
|
rproc = rproc_alloc(dev,
|
|
np->name,
|
|
&scp_ops,
|
|
fw_name,
|
|
sizeof(*scp));
|
|
if (!rproc) {
|
|
dev_err(dev, "unable to allocate remoteproc\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
scp = (struct mtk_scp *)rproc->priv;
|
|
scp->rproc = rproc;
|
|
scp->dev = dev;
|
|
platform_set_drvdata(pdev, scp);
|
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram");
|
|
scp->sram_base = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR((__force void *)scp->sram_base)) {
|
|
dev_err(dev, "Failed to parse and map sram memory\n");
|
|
ret = PTR_ERR((__force void *)scp->sram_base);
|
|
goto free_rproc;
|
|
}
|
|
scp->sram_size = resource_size(res);
|
|
|
|
mutex_init(&scp->send_lock);
|
|
for (i = 0; i < SCP_IPI_MAX; i++)
|
|
mutex_init(&scp->ipi_desc[i].lock);
|
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
|
|
scp->reg_base = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR((__force void *)scp->reg_base)) {
|
|
dev_err(dev, "Failed to parse and map cfg memory\n");
|
|
ret = PTR_ERR((__force void *)scp->reg_base);
|
|
goto destroy_mutex;
|
|
}
|
|
|
|
ret = scp_map_memory_region(scp);
|
|
if (ret)
|
|
goto destroy_mutex;
|
|
|
|
scp->clk = devm_clk_get(dev, "main");
|
|
if (IS_ERR(scp->clk)) {
|
|
dev_err(dev, "Failed to get clock\n");
|
|
ret = PTR_ERR(scp->clk);
|
|
goto release_dev_mem;
|
|
}
|
|
|
|
ret = clk_prepare_enable(scp->clk);
|
|
if (ret) {
|
|
dev_err(dev, "failed to enable clocks\n");
|
|
goto release_dev_mem;
|
|
}
|
|
|
|
ret = scp_ipi_init(scp);
|
|
clk_disable_unprepare(scp->clk);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to init ipi\n");
|
|
goto release_dev_mem;
|
|
}
|
|
|
|
/* register SCP initialization IPI */
|
|
ret = scp_ipi_register(scp, SCP_IPI_INIT, scp_init_ipi_handler, scp);
|
|
if (ret) {
|
|
dev_err(dev, "Failed to register IPI_SCP_INIT\n");
|
|
goto release_dev_mem;
|
|
}
|
|
|
|
init_waitqueue_head(&scp->run.wq);
|
|
init_waitqueue_head(&scp->ack_wq);
|
|
|
|
scp_add_rpmsg_subdev(scp);
|
|
|
|
ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0), NULL,
|
|
scp_irq_handler, IRQF_ONESHOT,
|
|
pdev->name, scp);
|
|
|
|
if (ret) {
|
|
dev_err(dev, "failed to request irq\n");
|
|
goto remove_subdev;
|
|
}
|
|
|
|
ret = rproc_add(rproc);
|
|
if (ret)
|
|
goto remove_subdev;
|
|
|
|
return 0;
|
|
|
|
remove_subdev:
|
|
scp_remove_rpmsg_subdev(scp);
|
|
scp_ipi_unregister(scp, SCP_IPI_INIT);
|
|
release_dev_mem:
|
|
scp_unmap_memory_region(scp);
|
|
destroy_mutex:
|
|
for (i = 0; i < SCP_IPI_MAX; i++)
|
|
mutex_destroy(&scp->ipi_desc[i].lock);
|
|
mutex_destroy(&scp->send_lock);
|
|
free_rproc:
|
|
rproc_free(rproc);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int scp_remove(struct platform_device *pdev)
|
|
{
|
|
struct mtk_scp *scp = platform_get_drvdata(pdev);
|
|
int i;
|
|
|
|
rproc_del(scp->rproc);
|
|
scp_remove_rpmsg_subdev(scp);
|
|
scp_ipi_unregister(scp, SCP_IPI_INIT);
|
|
scp_unmap_memory_region(scp);
|
|
for (i = 0; i < SCP_IPI_MAX; i++)
|
|
mutex_destroy(&scp->ipi_desc[i].lock);
|
|
mutex_destroy(&scp->send_lock);
|
|
rproc_free(scp->rproc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id mtk_scp_of_match[] = {
|
|
{ .compatible = "mediatek,mt8183-scp"},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, mtk_scp_of_match);
|
|
|
|
static struct platform_driver mtk_scp_driver = {
|
|
.probe = scp_probe,
|
|
.remove = scp_remove,
|
|
.driver = {
|
|
.name = "mtk-scp",
|
|
.of_match_table = of_match_ptr(mtk_scp_of_match),
|
|
},
|
|
};
|
|
|
|
module_platform_driver(mtk_scp_driver);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("MediaTek SCP control driver");
|