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![Yu Zhe](/assets/img/avatar_default.png)
Pointer variables of void * type do not require type cast. Signed-off-by: Yu Zhe <yuzhe@nfschina.com> Link: https://lore.kernel.org/r/20230328024907.29791-1-yuzhe@nfschina.com [Fixed merge conflict in xlnx_r5_remoteproc.c] Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
1233 lines
31 KiB
C
1233 lines
31 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* ZynqMP R5 Remote Processor driver
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*
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*/
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#include <dt-bindings/power/xlnx-zynqmp-power.h>
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#include <linux/dma-mapping.h>
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#include <linux/firmware/xlnx-zynqmp.h>
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#include <linux/kernel.h>
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#include <linux/mailbox_client.h>
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#include <linux/mailbox/zynqmp-ipi-message.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 "remoteproc_internal.h"
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/* IPI buffer MAX length */
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#define IPI_BUF_LEN_MAX 32U
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/* RX mailbox client buffer max length */
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#define MBOX_CLIENT_BUF_MAX (IPI_BUF_LEN_MAX + \
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sizeof(struct zynqmp_ipi_message))
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/*
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* settings for RPU cluster mode which
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* reflects possible values of xlnx,cluster-mode dt-property
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*/
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enum zynqmp_r5_cluster_mode {
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SPLIT_MODE = 0, /* When cores run as separate processor */
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LOCKSTEP_MODE = 1, /* cores execute same code in lockstep,clk-for-clk */
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SINGLE_CPU_MODE = 2, /* core0 is held in reset and only core1 runs */
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};
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/**
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* struct mem_bank_data - Memory Bank description
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*
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* @addr: Start address of memory bank
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* @size: Size of Memory bank
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* @pm_domain_id: Power-domains id of memory bank for firmware to turn on/off
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* @bank_name: name of the bank for remoteproc framework
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*/
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struct mem_bank_data {
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phys_addr_t addr;
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size_t size;
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u32 pm_domain_id;
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char *bank_name;
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};
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/**
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* struct mbox_info
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*
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* @rx_mc_buf: to copy data from mailbox rx channel
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* @tx_mc_buf: to copy data to mailbox tx channel
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* @r5_core: this mailbox's corresponding r5_core pointer
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* @mbox_work: schedule work after receiving data from mailbox
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* @mbox_cl: mailbox client
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* @tx_chan: mailbox tx channel
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* @rx_chan: mailbox rx channel
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*/
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struct mbox_info {
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unsigned char rx_mc_buf[MBOX_CLIENT_BUF_MAX];
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unsigned char tx_mc_buf[MBOX_CLIENT_BUF_MAX];
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struct zynqmp_r5_core *r5_core;
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struct work_struct mbox_work;
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struct mbox_client mbox_cl;
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struct mbox_chan *tx_chan;
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struct mbox_chan *rx_chan;
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};
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/*
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* Hardcoded TCM bank values. This will be removed once TCM bindings are
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* accepted for system-dt specifications and upstreamed in linux kernel
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*/
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static const struct mem_bank_data zynqmp_tcm_banks[] = {
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{0xffe00000UL, 0x10000UL, PD_R5_0_ATCM, "atcm0"}, /* TCM 64KB each */
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{0xffe20000UL, 0x10000UL, PD_R5_0_BTCM, "btcm0"},
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{0xffe90000UL, 0x10000UL, PD_R5_1_ATCM, "atcm1"},
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{0xffeb0000UL, 0x10000UL, PD_R5_1_BTCM, "btcm1"},
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};
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/**
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* struct zynqmp_r5_core
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*
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* @dev: device of RPU instance
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* @np: device node of RPU instance
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* @tcm_bank_count: number TCM banks accessible to this RPU
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* @tcm_banks: array of each TCM bank data
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* @rproc: rproc handle
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* @pm_domain_id: RPU CPU power domain id
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* @ipi: pointer to mailbox information
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*/
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struct zynqmp_r5_core {
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struct device *dev;
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struct device_node *np;
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int tcm_bank_count;
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struct mem_bank_data **tcm_banks;
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struct rproc *rproc;
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u32 pm_domain_id;
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struct mbox_info *ipi;
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};
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/**
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* struct zynqmp_r5_cluster
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*
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* @dev: r5f subsystem cluster device node
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* @mode: cluster mode of type zynqmp_r5_cluster_mode
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* @core_count: number of r5 cores used for this cluster mode
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* @r5_cores: Array of pointers pointing to r5 core
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*/
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struct zynqmp_r5_cluster {
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struct device *dev;
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enum zynqmp_r5_cluster_mode mode;
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int core_count;
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struct zynqmp_r5_core **r5_cores;
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};
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/**
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* event_notified_idr_cb() - callback for vq_interrupt per notifyid
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* @id: rproc->notify id
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* @ptr: pointer to idr private data
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* @data: data passed to idr_for_each callback
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*
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* Pass notification to remoteproc virtio
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*
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* Return: 0. having return is to satisfy the idr_for_each() function
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* pointer input argument requirement.
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**/
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static int event_notified_idr_cb(int id, void *ptr, void *data)
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{
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struct rproc *rproc = data;
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if (rproc_vq_interrupt(rproc, id) == IRQ_NONE)
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dev_dbg(&rproc->dev, "data not found for vqid=%d\n", id);
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return 0;
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}
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/**
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* handle_event_notified() - remoteproc notification work function
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* @work: pointer to the work structure
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*
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* It checks each registered remoteproc notify IDs.
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*/
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static void handle_event_notified(struct work_struct *work)
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{
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struct mbox_info *ipi;
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struct rproc *rproc;
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ipi = container_of(work, struct mbox_info, mbox_work);
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rproc = ipi->r5_core->rproc;
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/*
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* We only use IPI for interrupt. The RPU firmware side may or may
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* not write the notifyid when it trigger IPI.
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* And thus, we scan through all the registered notifyids and
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* find which one is valid to get the message.
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* Even if message from firmware is NULL, we attempt to get vqid
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*/
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idr_for_each(&rproc->notifyids, event_notified_idr_cb, rproc);
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}
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/**
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* zynqmp_r5_mb_rx_cb() - receive channel mailbox callback
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* @cl: mailbox client
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* @msg: message pointer
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*
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* Receive data from ipi buffer, ack interrupt and then
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* it will schedule the R5 notification work.
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*/
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static void zynqmp_r5_mb_rx_cb(struct mbox_client *cl, void *msg)
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{
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struct zynqmp_ipi_message *ipi_msg, *buf_msg;
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struct mbox_info *ipi;
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size_t len;
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ipi = container_of(cl, struct mbox_info, mbox_cl);
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/* copy data from ipi buffer to r5_core */
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ipi_msg = (struct zynqmp_ipi_message *)msg;
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buf_msg = (struct zynqmp_ipi_message *)ipi->rx_mc_buf;
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len = ipi_msg->len;
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if (len > IPI_BUF_LEN_MAX) {
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dev_warn(cl->dev, "msg size exceeded than %d\n",
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IPI_BUF_LEN_MAX);
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len = IPI_BUF_LEN_MAX;
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}
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buf_msg->len = len;
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memcpy(buf_msg->data, ipi_msg->data, len);
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/* received and processed interrupt ack */
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if (mbox_send_message(ipi->rx_chan, NULL) < 0)
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dev_err(cl->dev, "ack failed to mbox rx_chan\n");
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schedule_work(&ipi->mbox_work);
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}
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/**
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* zynqmp_r5_setup_mbox() - Setup mailboxes related properties
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* this is used for each individual R5 core
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*
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* @cdev: child node device
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*
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* Function to setup mailboxes related properties
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* return : NULL if failed else pointer to mbox_info
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*/
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static struct mbox_info *zynqmp_r5_setup_mbox(struct device *cdev)
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{
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struct mbox_client *mbox_cl;
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struct mbox_info *ipi;
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ipi = kzalloc(sizeof(*ipi), GFP_KERNEL);
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if (!ipi)
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return NULL;
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mbox_cl = &ipi->mbox_cl;
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mbox_cl->rx_callback = zynqmp_r5_mb_rx_cb;
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mbox_cl->tx_block = false;
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mbox_cl->knows_txdone = false;
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mbox_cl->tx_done = NULL;
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mbox_cl->dev = cdev;
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/* Request TX and RX channels */
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ipi->tx_chan = mbox_request_channel_byname(mbox_cl, "tx");
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if (IS_ERR(ipi->tx_chan)) {
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ipi->tx_chan = NULL;
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kfree(ipi);
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dev_warn(cdev, "mbox tx channel request failed\n");
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return NULL;
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}
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ipi->rx_chan = mbox_request_channel_byname(mbox_cl, "rx");
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if (IS_ERR(ipi->rx_chan)) {
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mbox_free_channel(ipi->tx_chan);
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ipi->rx_chan = NULL;
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ipi->tx_chan = NULL;
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kfree(ipi);
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dev_warn(cdev, "mbox rx channel request failed\n");
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return NULL;
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}
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INIT_WORK(&ipi->mbox_work, handle_event_notified);
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return ipi;
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}
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static void zynqmp_r5_free_mbox(struct mbox_info *ipi)
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{
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if (!ipi)
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return;
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if (ipi->tx_chan) {
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mbox_free_channel(ipi->tx_chan);
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ipi->tx_chan = NULL;
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}
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if (ipi->rx_chan) {
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mbox_free_channel(ipi->rx_chan);
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ipi->rx_chan = NULL;
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}
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kfree(ipi);
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}
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/*
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* zynqmp_r5_core_kick() - kick a firmware if mbox is provided
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* @rproc: r5 core's corresponding rproc structure
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* @vqid: virtqueue ID
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*/
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static void zynqmp_r5_rproc_kick(struct rproc *rproc, int vqid)
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{
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struct zynqmp_r5_core *r5_core = rproc->priv;
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struct device *dev = r5_core->dev;
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struct zynqmp_ipi_message *mb_msg;
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struct mbox_info *ipi;
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int ret;
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ipi = r5_core->ipi;
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if (!ipi)
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return;
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mb_msg = (struct zynqmp_ipi_message *)ipi->tx_mc_buf;
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memcpy(mb_msg->data, &vqid, sizeof(vqid));
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mb_msg->len = sizeof(vqid);
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ret = mbox_send_message(ipi->tx_chan, mb_msg);
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if (ret < 0)
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dev_warn(dev, "failed to send message\n");
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}
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/*
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* zynqmp_r5_set_mode()
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*
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* set RPU cluster and TCM operation mode
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*
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* @r5_core: pointer to zynqmp_r5_core type object
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* @fw_reg_val: value expected by firmware to configure RPU cluster mode
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* @tcm_mode: value expected by fw to configure TCM mode (lockstep or split)
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*
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* Return: 0 for success and < 0 for failure
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*/
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static int zynqmp_r5_set_mode(struct zynqmp_r5_core *r5_core,
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enum rpu_oper_mode fw_reg_val,
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enum rpu_tcm_comb tcm_mode)
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{
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int ret;
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ret = zynqmp_pm_set_rpu_mode(r5_core->pm_domain_id, fw_reg_val);
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if (ret < 0) {
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dev_err(r5_core->dev, "failed to set RPU mode\n");
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return ret;
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}
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ret = zynqmp_pm_set_tcm_config(r5_core->pm_domain_id, tcm_mode);
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if (ret < 0)
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dev_err(r5_core->dev, "failed to configure TCM\n");
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return ret;
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}
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/*
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* zynqmp_r5_rproc_start()
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* @rproc: single R5 core's corresponding rproc instance
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*
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* Start R5 Core from designated boot address.
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*
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* return 0 on success, otherwise non-zero value on failure
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*/
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static int zynqmp_r5_rproc_start(struct rproc *rproc)
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{
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struct zynqmp_r5_core *r5_core = rproc->priv;
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enum rpu_boot_mem bootmem;
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int ret;
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/*
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* The exception vector pointers (EVP) refer to the base-address of
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* exception vectors (for reset, IRQ, FIQ, etc). The reset-vector
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* starts at the base-address and subsequent vectors are on 4-byte
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* boundaries.
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*
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* Exception vectors can start either from 0x0000_0000 (LOVEC) or
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* from 0xFFFF_0000 (HIVEC) which is mapped in the OCM (On-Chip Memory)
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*
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* Usually firmware will put Exception vectors at LOVEC.
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*
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* It is not recommend that you change the exception vector.
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* Changing the EVP to HIVEC will result in increased interrupt latency
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* and jitter. Also, if the OCM is secured and the Cortex-R5F processor
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* is non-secured, then the Cortex-R5F processor cannot access the
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* HIVEC exception vectors in the OCM.
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*/
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bootmem = (rproc->bootaddr >= 0xFFFC0000) ?
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PM_RPU_BOOTMEM_HIVEC : PM_RPU_BOOTMEM_LOVEC;
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dev_dbg(r5_core->dev, "RPU boot addr 0x%llx from %s.", rproc->bootaddr,
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bootmem == PM_RPU_BOOTMEM_HIVEC ? "OCM" : "TCM");
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ret = zynqmp_pm_request_wake(r5_core->pm_domain_id, 1,
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bootmem, ZYNQMP_PM_REQUEST_ACK_NO);
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if (ret)
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dev_err(r5_core->dev,
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"failed to start RPU = 0x%x\n", r5_core->pm_domain_id);
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return ret;
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}
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/*
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* zynqmp_r5_rproc_stop()
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* @rproc: single R5 core's corresponding rproc instance
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*
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* Power down R5 Core.
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*
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* return 0 on success, otherwise non-zero value on failure
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*/
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static int zynqmp_r5_rproc_stop(struct rproc *rproc)
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{
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struct zynqmp_r5_core *r5_core = rproc->priv;
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int ret;
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ret = zynqmp_pm_force_pwrdwn(r5_core->pm_domain_id,
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ZYNQMP_PM_REQUEST_ACK_BLOCKING);
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if (ret)
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dev_err(r5_core->dev, "failed to stop remoteproc RPU %d\n", ret);
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return ret;
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}
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/*
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* zynqmp_r5_mem_region_map()
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* @rproc: single R5 core's corresponding rproc instance
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* @mem: mem descriptor to map reserved memory-regions
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*
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* Callback to map va for memory-region's carveout.
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*
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* return 0 on success, otherwise non-zero value on failure
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*/
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static int zynqmp_r5_mem_region_map(struct rproc *rproc,
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struct rproc_mem_entry *mem)
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{
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void __iomem *va;
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va = ioremap_wc(mem->dma, mem->len);
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if (IS_ERR_OR_NULL(va))
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return -ENOMEM;
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mem->va = (void *)va;
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return 0;
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}
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/*
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* zynqmp_r5_rproc_mem_unmap
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* @rproc: single R5 core's corresponding rproc instance
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* @mem: mem entry to unmap
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*
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* Unmap memory-region carveout
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*
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* return: always returns 0
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*/
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static int zynqmp_r5_mem_region_unmap(struct rproc *rproc,
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struct rproc_mem_entry *mem)
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{
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iounmap((void __iomem *)mem->va);
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return 0;
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}
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/*
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* add_mem_regions_carveout()
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* @rproc: single R5 core's corresponding rproc instance
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*
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* Construct rproc mem carveouts from memory-region property nodes
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*
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* return 0 on success, otherwise non-zero value on failure
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*/
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static int add_mem_regions_carveout(struct rproc *rproc)
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{
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struct rproc_mem_entry *rproc_mem;
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struct zynqmp_r5_core *r5_core;
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struct of_phandle_iterator it;
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struct reserved_mem *rmem;
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int i = 0;
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r5_core = rproc->priv;
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/* Register associated reserved memory regions */
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of_phandle_iterator_init(&it, r5_core->np, "memory-region", NULL, 0);
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while (of_phandle_iterator_next(&it) == 0) {
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rmem = of_reserved_mem_lookup(it.node);
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if (!rmem) {
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of_node_put(it.node);
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dev_err(&rproc->dev, "unable to acquire memory-region\n");
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return -EINVAL;
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}
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if (!strcmp(it.node->name, "vdev0buffer")) {
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/* Init reserved memory for vdev buffer */
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rproc_mem = rproc_of_resm_mem_entry_init(&rproc->dev, i,
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rmem->size,
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rmem->base,
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it.node->name);
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} else {
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/* Register associated reserved memory regions */
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rproc_mem = rproc_mem_entry_init(&rproc->dev, NULL,
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(dma_addr_t)rmem->base,
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rmem->size, rmem->base,
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zynqmp_r5_mem_region_map,
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zynqmp_r5_mem_region_unmap,
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it.node->name);
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}
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if (!rproc_mem) {
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of_node_put(it.node);
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return -ENOMEM;
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}
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|
rproc_add_carveout(rproc, rproc_mem);
|
|
|
|
dev_dbg(&rproc->dev, "reserved mem carveout %s addr=%llx, size=0x%llx",
|
|
it.node->name, rmem->base, rmem->size);
|
|
i++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* tcm_mem_unmap()
|
|
* @rproc: single R5 core's corresponding rproc instance
|
|
* @mem: tcm mem entry to unmap
|
|
*
|
|
* Unmap TCM banks when powering down R5 core.
|
|
*
|
|
* return always 0
|
|
*/
|
|
static int tcm_mem_unmap(struct rproc *rproc, struct rproc_mem_entry *mem)
|
|
{
|
|
iounmap((void __iomem *)mem->va);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* tcm_mem_map()
|
|
* @rproc: single R5 core's corresponding rproc instance
|
|
* @mem: tcm memory entry descriptor
|
|
*
|
|
* Given TCM bank entry, this func setup virtual address for TCM bank
|
|
* remoteproc carveout. It also takes care of va to da address translation
|
|
*
|
|
* return 0 on success, otherwise non-zero value on failure
|
|
*/
|
|
static int tcm_mem_map(struct rproc *rproc,
|
|
struct rproc_mem_entry *mem)
|
|
{
|
|
void __iomem *va;
|
|
|
|
va = ioremap_wc(mem->dma, mem->len);
|
|
if (IS_ERR_OR_NULL(va))
|
|
return -ENOMEM;
|
|
|
|
/* Update memory entry va */
|
|
mem->va = (void *)va;
|
|
|
|
/* clear TCMs */
|
|
memset_io(va, 0, mem->len);
|
|
|
|
/*
|
|
* The R5s expect their TCM banks to be at address 0x0 and 0x2000,
|
|
* while on the Linux side they are at 0xffexxxxx.
|
|
*
|
|
* Zero out the high 12 bits of the address. This will give
|
|
* expected values for TCM Banks 0A and 0B (0x0 and 0x20000).
|
|
*/
|
|
mem->da &= 0x000fffff;
|
|
|
|
/*
|
|
* TCM Banks 1A and 1B still have to be translated.
|
|
*
|
|
* Below handle these two banks' absolute addresses (0xffe90000 and
|
|
* 0xffeb0000) and convert to the expected relative addresses
|
|
* (0x0 and 0x20000).
|
|
*/
|
|
if (mem->da == 0x90000 || mem->da == 0xB0000)
|
|
mem->da -= 0x90000;
|
|
|
|
/* if translated TCM bank address is not valid report error */
|
|
if (mem->da != 0x0 && mem->da != 0x20000) {
|
|
dev_err(&rproc->dev, "invalid TCM address: %x\n", mem->da);
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* add_tcm_carveout_split_mode()
|
|
* @rproc: single R5 core's corresponding rproc instance
|
|
*
|
|
* allocate and add remoteproc carveout for TCM memory in split mode
|
|
*
|
|
* return 0 on success, otherwise non-zero value on failure
|
|
*/
|
|
static int add_tcm_carveout_split_mode(struct rproc *rproc)
|
|
{
|
|
struct rproc_mem_entry *rproc_mem;
|
|
struct zynqmp_r5_core *r5_core;
|
|
int i, num_banks, ret;
|
|
phys_addr_t bank_addr;
|
|
struct device *dev;
|
|
u32 pm_domain_id;
|
|
size_t bank_size;
|
|
char *bank_name;
|
|
|
|
r5_core = rproc->priv;
|
|
dev = r5_core->dev;
|
|
num_banks = r5_core->tcm_bank_count;
|
|
|
|
/*
|
|
* Power-on Each 64KB TCM,
|
|
* register its address space, map and unmap functions
|
|
* and add carveouts accordingly
|
|
*/
|
|
for (i = 0; i < num_banks; i++) {
|
|
bank_addr = r5_core->tcm_banks[i]->addr;
|
|
bank_name = r5_core->tcm_banks[i]->bank_name;
|
|
bank_size = r5_core->tcm_banks[i]->size;
|
|
pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
|
|
|
|
ret = zynqmp_pm_request_node(pm_domain_id,
|
|
ZYNQMP_PM_CAPABILITY_ACCESS, 0,
|
|
ZYNQMP_PM_REQUEST_ACK_BLOCKING);
|
|
if (ret < 0) {
|
|
dev_err(dev, "failed to turn on TCM 0x%x", pm_domain_id);
|
|
goto release_tcm_split;
|
|
}
|
|
|
|
dev_dbg(dev, "TCM carveout split mode %s addr=%llx, size=0x%lx",
|
|
bank_name, bank_addr, bank_size);
|
|
|
|
rproc_mem = rproc_mem_entry_init(dev, NULL, bank_addr,
|
|
bank_size, bank_addr,
|
|
tcm_mem_map, tcm_mem_unmap,
|
|
bank_name);
|
|
if (!rproc_mem) {
|
|
ret = -ENOMEM;
|
|
zynqmp_pm_release_node(pm_domain_id);
|
|
goto release_tcm_split;
|
|
}
|
|
|
|
rproc_add_carveout(rproc, rproc_mem);
|
|
}
|
|
|
|
return 0;
|
|
|
|
release_tcm_split:
|
|
/* If failed, Turn off all TCM banks turned on before */
|
|
for (i--; i >= 0; i--) {
|
|
pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
|
|
zynqmp_pm_release_node(pm_domain_id);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* add_tcm_carveout_lockstep_mode()
|
|
* @rproc: single R5 core's corresponding rproc instance
|
|
*
|
|
* allocate and add remoteproc carveout for TCM memory in lockstep mode
|
|
*
|
|
* return 0 on success, otherwise non-zero value on failure
|
|
*/
|
|
static int add_tcm_carveout_lockstep_mode(struct rproc *rproc)
|
|
{
|
|
struct rproc_mem_entry *rproc_mem;
|
|
struct zynqmp_r5_core *r5_core;
|
|
int i, num_banks, ret;
|
|
phys_addr_t bank_addr;
|
|
size_t bank_size = 0;
|
|
struct device *dev;
|
|
u32 pm_domain_id;
|
|
char *bank_name;
|
|
|
|
r5_core = rproc->priv;
|
|
dev = r5_core->dev;
|
|
|
|
/* Go through zynqmp banks for r5 node */
|
|
num_banks = r5_core->tcm_bank_count;
|
|
|
|
/*
|
|
* In lockstep mode, TCM is contiguous memory block
|
|
* However, each TCM block still needs to be enabled individually.
|
|
* So, Enable each TCM block individually, but add their size
|
|
* to create contiguous memory region.
|
|
*/
|
|
bank_addr = r5_core->tcm_banks[0]->addr;
|
|
bank_name = r5_core->tcm_banks[0]->bank_name;
|
|
|
|
for (i = 0; i < num_banks; i++) {
|
|
bank_size += r5_core->tcm_banks[i]->size;
|
|
pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
|
|
|
|
/* Turn on each TCM bank individually */
|
|
ret = zynqmp_pm_request_node(pm_domain_id,
|
|
ZYNQMP_PM_CAPABILITY_ACCESS, 0,
|
|
ZYNQMP_PM_REQUEST_ACK_BLOCKING);
|
|
if (ret < 0) {
|
|
dev_err(dev, "failed to turn on TCM 0x%x", pm_domain_id);
|
|
goto release_tcm_lockstep;
|
|
}
|
|
}
|
|
|
|
dev_dbg(dev, "TCM add carveout lockstep mode %s addr=0x%llx, size=0x%lx",
|
|
bank_name, bank_addr, bank_size);
|
|
|
|
/* Register TCM address range, TCM map and unmap functions */
|
|
rproc_mem = rproc_mem_entry_init(dev, NULL, bank_addr,
|
|
bank_size, bank_addr,
|
|
tcm_mem_map, tcm_mem_unmap,
|
|
bank_name);
|
|
if (!rproc_mem) {
|
|
ret = -ENOMEM;
|
|
goto release_tcm_lockstep;
|
|
}
|
|
|
|
/* If registration is success, add carveouts */
|
|
rproc_add_carveout(rproc, rproc_mem);
|
|
|
|
return 0;
|
|
|
|
release_tcm_lockstep:
|
|
/* If failed, Turn off all TCM banks turned on before */
|
|
for (i--; i >= 0; i--) {
|
|
pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
|
|
zynqmp_pm_release_node(pm_domain_id);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* add_tcm_banks()
|
|
* @rproc: single R5 core's corresponding rproc instance
|
|
*
|
|
* allocate and add remoteproc carveouts for TCM memory based on cluster mode
|
|
*
|
|
* return 0 on success, otherwise non-zero value on failure
|
|
*/
|
|
static int add_tcm_banks(struct rproc *rproc)
|
|
{
|
|
struct zynqmp_r5_cluster *cluster;
|
|
struct zynqmp_r5_core *r5_core;
|
|
struct device *dev;
|
|
|
|
r5_core = rproc->priv;
|
|
if (!r5_core)
|
|
return -EINVAL;
|
|
|
|
dev = r5_core->dev;
|
|
|
|
cluster = dev_get_drvdata(dev->parent);
|
|
if (!cluster) {
|
|
dev_err(dev->parent, "Invalid driver data\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* In lockstep mode TCM banks are one contiguous memory region of 256Kb
|
|
* In split mode, each TCM bank is 64Kb and not contiguous.
|
|
* We add memory carveouts accordingly.
|
|
*/
|
|
if (cluster->mode == SPLIT_MODE)
|
|
return add_tcm_carveout_split_mode(rproc);
|
|
else if (cluster->mode == LOCKSTEP_MODE)
|
|
return add_tcm_carveout_lockstep_mode(rproc);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* zynqmp_r5_parse_fw()
|
|
* @rproc: single R5 core's corresponding rproc instance
|
|
* @fw: ptr to firmware to be loaded onto r5 core
|
|
*
|
|
* get resource table if available
|
|
*
|
|
* return 0 on success, otherwise non-zero value on failure
|
|
*/
|
|
static int zynqmp_r5_parse_fw(struct rproc *rproc, const struct firmware *fw)
|
|
{
|
|
int ret;
|
|
|
|
ret = rproc_elf_load_rsc_table(rproc, fw);
|
|
if (ret == -EINVAL) {
|
|
/*
|
|
* resource table only required for IPC.
|
|
* if not present, this is not necessarily an error;
|
|
* for example, loading r5 hello world application
|
|
* so simply inform user and keep going.
|
|
*/
|
|
dev_info(&rproc->dev, "no resource table found.\n");
|
|
ret = 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* zynqmp_r5_rproc_prepare()
|
|
* adds carveouts for TCM bank and reserved memory regions
|
|
*
|
|
* @rproc: Device node of each rproc
|
|
*
|
|
* Return: 0 for success else < 0 error code
|
|
*/
|
|
static int zynqmp_r5_rproc_prepare(struct rproc *rproc)
|
|
{
|
|
int ret;
|
|
|
|
ret = add_tcm_banks(rproc);
|
|
if (ret) {
|
|
dev_err(&rproc->dev, "failed to get TCM banks, err %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = add_mem_regions_carveout(rproc);
|
|
if (ret) {
|
|
dev_err(&rproc->dev, "failed to get reserve mem regions %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* zynqmp_r5_rproc_unprepare()
|
|
* Turns off TCM banks using power-domain id
|
|
*
|
|
* @rproc: Device node of each rproc
|
|
*
|
|
* Return: always 0
|
|
*/
|
|
static int zynqmp_r5_rproc_unprepare(struct rproc *rproc)
|
|
{
|
|
struct zynqmp_r5_core *r5_core;
|
|
u32 pm_domain_id;
|
|
int i;
|
|
|
|
r5_core = rproc->priv;
|
|
|
|
for (i = 0; i < r5_core->tcm_bank_count; i++) {
|
|
pm_domain_id = r5_core->tcm_banks[i]->pm_domain_id;
|
|
if (zynqmp_pm_release_node(pm_domain_id))
|
|
dev_warn(r5_core->dev,
|
|
"can't turn off TCM bank 0x%x", pm_domain_id);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct rproc_ops zynqmp_r5_rproc_ops = {
|
|
.prepare = zynqmp_r5_rproc_prepare,
|
|
.unprepare = zynqmp_r5_rproc_unprepare,
|
|
.start = zynqmp_r5_rproc_start,
|
|
.stop = zynqmp_r5_rproc_stop,
|
|
.load = rproc_elf_load_segments,
|
|
.parse_fw = zynqmp_r5_parse_fw,
|
|
.find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table,
|
|
.sanity_check = rproc_elf_sanity_check,
|
|
.get_boot_addr = rproc_elf_get_boot_addr,
|
|
.kick = zynqmp_r5_rproc_kick,
|
|
};
|
|
|
|
/**
|
|
* zynqmp_r5_add_rproc_core()
|
|
* Allocate and add struct rproc object for each r5f core
|
|
* This is called for each individual r5f core
|
|
*
|
|
* @cdev: Device node of each r5 core
|
|
*
|
|
* Return: zynqmp_r5_core object for success else error code pointer
|
|
*/
|
|
static struct zynqmp_r5_core *zynqmp_r5_add_rproc_core(struct device *cdev)
|
|
{
|
|
struct zynqmp_r5_core *r5_core;
|
|
struct rproc *r5_rproc;
|
|
int ret;
|
|
|
|
/* Set up DMA mask */
|
|
ret = dma_set_coherent_mask(cdev, DMA_BIT_MASK(32));
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
|
|
/* Allocate remoteproc instance */
|
|
r5_rproc = rproc_alloc(cdev, dev_name(cdev),
|
|
&zynqmp_r5_rproc_ops,
|
|
NULL, sizeof(struct zynqmp_r5_core));
|
|
if (!r5_rproc) {
|
|
dev_err(cdev, "failed to allocate memory for rproc instance\n");
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
r5_rproc->auto_boot = false;
|
|
r5_core = r5_rproc->priv;
|
|
r5_core->dev = cdev;
|
|
r5_core->np = dev_of_node(cdev);
|
|
if (!r5_core->np) {
|
|
dev_err(cdev, "can't get device node for r5 core\n");
|
|
ret = -EINVAL;
|
|
goto free_rproc;
|
|
}
|
|
|
|
/* Add R5 remoteproc core */
|
|
ret = rproc_add(r5_rproc);
|
|
if (ret) {
|
|
dev_err(cdev, "failed to add r5 remoteproc\n");
|
|
goto free_rproc;
|
|
}
|
|
|
|
r5_core->rproc = r5_rproc;
|
|
return r5_core;
|
|
|
|
free_rproc:
|
|
rproc_free(r5_rproc);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
/**
|
|
* zynqmp_r5_get_tcm_node()
|
|
* Ideally this function should parse tcm node and store information
|
|
* in r5_core instance. For now, Hardcoded TCM information is used.
|
|
* This approach is used as TCM bindings for system-dt is being developed
|
|
*
|
|
* @cluster: pointer to zynqmp_r5_cluster type object
|
|
*
|
|
* Return: 0 for success and < 0 error code for failure.
|
|
*/
|
|
static int zynqmp_r5_get_tcm_node(struct zynqmp_r5_cluster *cluster)
|
|
{
|
|
struct device *dev = cluster->dev;
|
|
struct zynqmp_r5_core *r5_core;
|
|
int tcm_bank_count, tcm_node;
|
|
int i, j;
|
|
|
|
tcm_bank_count = ARRAY_SIZE(zynqmp_tcm_banks);
|
|
|
|
/* count per core tcm banks */
|
|
tcm_bank_count = tcm_bank_count / cluster->core_count;
|
|
|
|
/*
|
|
* r5 core 0 will use all of TCM banks in lockstep mode.
|
|
* In split mode, r5 core0 will use 128k and r5 core1 will use another
|
|
* 128k. Assign TCM banks to each core accordingly
|
|
*/
|
|
tcm_node = 0;
|
|
for (i = 0; i < cluster->core_count; i++) {
|
|
r5_core = cluster->r5_cores[i];
|
|
r5_core->tcm_banks = devm_kcalloc(dev, tcm_bank_count,
|
|
sizeof(struct mem_bank_data *),
|
|
GFP_KERNEL);
|
|
if (!r5_core->tcm_banks)
|
|
return -ENOMEM;
|
|
|
|
for (j = 0; j < tcm_bank_count; j++) {
|
|
/*
|
|
* Use pre-defined TCM reg values.
|
|
* Eventually this should be replaced by values
|
|
* parsed from dts.
|
|
*/
|
|
r5_core->tcm_banks[j] =
|
|
(struct mem_bank_data *)&zynqmp_tcm_banks[tcm_node];
|
|
tcm_node++;
|
|
}
|
|
|
|
r5_core->tcm_bank_count = tcm_bank_count;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* zynqmp_r5_core_init()
|
|
* Create and initialize zynqmp_r5_core type object
|
|
*
|
|
* @cluster: pointer to zynqmp_r5_cluster type object
|
|
* @fw_reg_val: value expected by firmware to configure RPU cluster mode
|
|
* @tcm_mode: value expected by fw to configure TCM mode (lockstep or split)
|
|
*
|
|
* Return: 0 for success and error code for failure.
|
|
*/
|
|
static int zynqmp_r5_core_init(struct zynqmp_r5_cluster *cluster,
|
|
enum rpu_oper_mode fw_reg_val,
|
|
enum rpu_tcm_comb tcm_mode)
|
|
{
|
|
struct device *dev = cluster->dev;
|
|
struct zynqmp_r5_core *r5_core;
|
|
int ret, i;
|
|
|
|
ret = zynqmp_r5_get_tcm_node(cluster);
|
|
if (ret < 0) {
|
|
dev_err(dev, "can't get tcm node, err %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
for (i = 0; i < cluster->core_count; i++) {
|
|
r5_core = cluster->r5_cores[i];
|
|
|
|
/* Initialize r5 cores with power-domains parsed from dts */
|
|
ret = of_property_read_u32_index(r5_core->np, "power-domains",
|
|
1, &r5_core->pm_domain_id);
|
|
if (ret) {
|
|
dev_err(dev, "failed to get power-domains property\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = zynqmp_r5_set_mode(r5_core, fw_reg_val, tcm_mode);
|
|
if (ret) {
|
|
dev_err(dev, "failed to set r5 cluster mode %d, err %d\n",
|
|
cluster->mode, ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* zynqmp_r5_cluster_init()
|
|
* Create and initialize zynqmp_r5_cluster type object
|
|
*
|
|
* @cluster: pointer to zynqmp_r5_cluster type object
|
|
*
|
|
* Return: 0 for success and error code for failure.
|
|
*/
|
|
static int zynqmp_r5_cluster_init(struct zynqmp_r5_cluster *cluster)
|
|
{
|
|
enum zynqmp_r5_cluster_mode cluster_mode = LOCKSTEP_MODE;
|
|
struct device *dev = cluster->dev;
|
|
struct device_node *dev_node = dev_of_node(dev);
|
|
struct platform_device *child_pdev;
|
|
struct zynqmp_r5_core **r5_cores;
|
|
enum rpu_oper_mode fw_reg_val;
|
|
struct device **child_devs;
|
|
struct device_node *child;
|
|
enum rpu_tcm_comb tcm_mode;
|
|
int core_count, ret, i;
|
|
struct mbox_info *ipi;
|
|
|
|
ret = of_property_read_u32(dev_node, "xlnx,cluster-mode", &cluster_mode);
|
|
|
|
/*
|
|
* on success returns 0, if not defined then returns -EINVAL,
|
|
* In that case, default is LOCKSTEP mode. Other than that
|
|
* returns relative error code < 0.
|
|
*/
|
|
if (ret != -EINVAL && ret != 0) {
|
|
dev_err(dev, "Invalid xlnx,cluster-mode property\n");
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* For now driver only supports split mode and lockstep mode.
|
|
* fail driver probe if either of that is not set in dts.
|
|
*/
|
|
if (cluster_mode == LOCKSTEP_MODE) {
|
|
tcm_mode = PM_RPU_TCM_COMB;
|
|
fw_reg_val = PM_RPU_MODE_LOCKSTEP;
|
|
} else if (cluster_mode == SPLIT_MODE) {
|
|
tcm_mode = PM_RPU_TCM_SPLIT;
|
|
fw_reg_val = PM_RPU_MODE_SPLIT;
|
|
} else {
|
|
dev_err(dev, "driver does not support cluster mode %d\n", cluster_mode);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Number of cores is decided by number of child nodes of
|
|
* r5f subsystem node in dts. If Split mode is used in dts
|
|
* 2 child nodes are expected.
|
|
* In lockstep mode if two child nodes are available,
|
|
* only use first child node and consider it as core0
|
|
* and ignore core1 dt node.
|
|
*/
|
|
core_count = of_get_available_child_count(dev_node);
|
|
if (core_count == 0) {
|
|
dev_err(dev, "Invalid number of r5 cores %d", core_count);
|
|
return -EINVAL;
|
|
} else if (cluster_mode == SPLIT_MODE && core_count != 2) {
|
|
dev_err(dev, "Invalid number of r5 cores for split mode\n");
|
|
return -EINVAL;
|
|
} else if (cluster_mode == LOCKSTEP_MODE && core_count == 2) {
|
|
dev_warn(dev, "Only r5 core0 will be used\n");
|
|
core_count = 1;
|
|
}
|
|
|
|
child_devs = kcalloc(core_count, sizeof(struct device *), GFP_KERNEL);
|
|
if (!child_devs)
|
|
return -ENOMEM;
|
|
|
|
r5_cores = kcalloc(core_count,
|
|
sizeof(struct zynqmp_r5_core *), GFP_KERNEL);
|
|
if (!r5_cores) {
|
|
kfree(child_devs);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
i = 0;
|
|
for_each_available_child_of_node(dev_node, child) {
|
|
child_pdev = of_find_device_by_node(child);
|
|
if (!child_pdev) {
|
|
of_node_put(child);
|
|
ret = -ENODEV;
|
|
goto release_r5_cores;
|
|
}
|
|
|
|
child_devs[i] = &child_pdev->dev;
|
|
|
|
/* create and add remoteproc instance of type struct rproc */
|
|
r5_cores[i] = zynqmp_r5_add_rproc_core(&child_pdev->dev);
|
|
if (IS_ERR(r5_cores[i])) {
|
|
of_node_put(child);
|
|
ret = PTR_ERR(r5_cores[i]);
|
|
r5_cores[i] = NULL;
|
|
goto release_r5_cores;
|
|
}
|
|
|
|
/*
|
|
* If mailbox nodes are disabled using "status" property then
|
|
* setting up mailbox channels will fail.
|
|
*/
|
|
ipi = zynqmp_r5_setup_mbox(&child_pdev->dev);
|
|
if (ipi) {
|
|
r5_cores[i]->ipi = ipi;
|
|
ipi->r5_core = r5_cores[i];
|
|
}
|
|
|
|
/*
|
|
* If two child nodes are available in dts in lockstep mode,
|
|
* then ignore second child node.
|
|
*/
|
|
if (cluster_mode == LOCKSTEP_MODE) {
|
|
of_node_put(child);
|
|
break;
|
|
}
|
|
|
|
i++;
|
|
}
|
|
|
|
cluster->mode = cluster_mode;
|
|
cluster->core_count = core_count;
|
|
cluster->r5_cores = r5_cores;
|
|
|
|
ret = zynqmp_r5_core_init(cluster, fw_reg_val, tcm_mode);
|
|
if (ret < 0) {
|
|
dev_err(dev, "failed to init r5 core err %d\n", ret);
|
|
cluster->core_count = 0;
|
|
cluster->r5_cores = NULL;
|
|
|
|
/*
|
|
* at this point rproc resources for each core are allocated.
|
|
* adjust index to free resources in reverse order
|
|
*/
|
|
i = core_count - 1;
|
|
goto release_r5_cores;
|
|
}
|
|
|
|
kfree(child_devs);
|
|
return 0;
|
|
|
|
release_r5_cores:
|
|
while (i >= 0) {
|
|
put_device(child_devs[i]);
|
|
if (r5_cores[i]) {
|
|
zynqmp_r5_free_mbox(r5_cores[i]->ipi);
|
|
of_reserved_mem_device_release(r5_cores[i]->dev);
|
|
rproc_del(r5_cores[i]->rproc);
|
|
rproc_free(r5_cores[i]->rproc);
|
|
}
|
|
i--;
|
|
}
|
|
kfree(r5_cores);
|
|
kfree(child_devs);
|
|
return ret;
|
|
}
|
|
|
|
static void zynqmp_r5_cluster_exit(void *data)
|
|
{
|
|
struct platform_device *pdev = data;
|
|
struct zynqmp_r5_cluster *cluster;
|
|
struct zynqmp_r5_core *r5_core;
|
|
int i;
|
|
|
|
cluster = platform_get_drvdata(pdev);
|
|
if (!cluster)
|
|
return;
|
|
|
|
for (i = 0; i < cluster->core_count; i++) {
|
|
r5_core = cluster->r5_cores[i];
|
|
zynqmp_r5_free_mbox(r5_core->ipi);
|
|
of_reserved_mem_device_release(r5_core->dev);
|
|
put_device(r5_core->dev);
|
|
rproc_del(r5_core->rproc);
|
|
rproc_free(r5_core->rproc);
|
|
}
|
|
|
|
kfree(cluster->r5_cores);
|
|
kfree(cluster);
|
|
platform_set_drvdata(pdev, NULL);
|
|
}
|
|
|
|
/*
|
|
* zynqmp_r5_remoteproc_probe()
|
|
* parse device-tree, initialize hardware and allocate required resources
|
|
* and remoteproc ops
|
|
*
|
|
* @pdev: domain platform device for R5 cluster
|
|
*
|
|
* Return: 0 for success and < 0 for failure.
|
|
*/
|
|
static int zynqmp_r5_remoteproc_probe(struct platform_device *pdev)
|
|
{
|
|
struct zynqmp_r5_cluster *cluster;
|
|
struct device *dev = &pdev->dev;
|
|
int ret;
|
|
|
|
cluster = kzalloc(sizeof(*cluster), GFP_KERNEL);
|
|
if (!cluster)
|
|
return -ENOMEM;
|
|
|
|
cluster->dev = dev;
|
|
|
|
ret = devm_of_platform_populate(dev);
|
|
if (ret) {
|
|
dev_err_probe(dev, ret, "failed to populate platform dev\n");
|
|
kfree(cluster);
|
|
return ret;
|
|
}
|
|
|
|
/* wire in so each core can be cleaned up at driver remove */
|
|
platform_set_drvdata(pdev, cluster);
|
|
|
|
ret = zynqmp_r5_cluster_init(cluster);
|
|
if (ret) {
|
|
kfree(cluster);
|
|
platform_set_drvdata(pdev, NULL);
|
|
dev_err_probe(dev, ret, "Invalid r5f subsystem device tree\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = devm_add_action_or_reset(dev, zynqmp_r5_cluster_exit, pdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Match table for OF platform binding */
|
|
static const struct of_device_id zynqmp_r5_remoteproc_match[] = {
|
|
{ .compatible = "xlnx,zynqmp-r5fss", },
|
|
{ /* end of list */ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, zynqmp_r5_remoteproc_match);
|
|
|
|
static struct platform_driver zynqmp_r5_remoteproc_driver = {
|
|
.probe = zynqmp_r5_remoteproc_probe,
|
|
.driver = {
|
|
.name = "zynqmp_r5_remoteproc",
|
|
.of_match_table = zynqmp_r5_remoteproc_match,
|
|
},
|
|
};
|
|
module_platform_driver(zynqmp_r5_remoteproc_driver);
|
|
|
|
MODULE_DESCRIPTION("Xilinx R5F remote processor driver");
|
|
MODULE_AUTHOR("Xilinx Inc.");
|
|
MODULE_LICENSE("GPL");
|