diff options
Diffstat (limited to 'drivers/remoteproc/ti_k3_r5_remoteproc.c')
| -rw-r--r-- | drivers/remoteproc/ti_k3_r5_remoteproc.c | 1799 |
1 files changed, 1799 insertions, 0 deletions
diff --git a/drivers/remoteproc/ti_k3_r5_remoteproc.c b/drivers/remoteproc/ti_k3_r5_remoteproc.c new file mode 100644 index 000000000..0481926c6 --- /dev/null +++ b/drivers/remoteproc/ti_k3_r5_remoteproc.c @@ -0,0 +1,1799 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * TI K3 R5F (MCU) Remote Processor driver + * + * Copyright (C) 2017-2022 Texas Instruments Incorporated - https://www.ti.com/ + * Suman Anna <s-anna@ti.com> + */ + +#include <linux/dma-mapping.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mailbox_client.h> +#include <linux/module.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/of_reserved_mem.h> +#include <linux/omap-mailbox.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/remoteproc.h> +#include <linux/reset.h> +#include <linux/slab.h> + +#include "omap_remoteproc.h" +#include "remoteproc_internal.h" +#include "ti_sci_proc.h" + +/* This address can either be for ATCM or BTCM with the other at address 0x0 */ +#define K3_R5_TCM_DEV_ADDR 0x41010000 + +/* R5 TI-SCI Processor Configuration Flags */ +#define PROC_BOOT_CFG_FLAG_R5_DBG_EN 0x00000001 +#define PROC_BOOT_CFG_FLAG_R5_DBG_NIDEN 0x00000002 +#define PROC_BOOT_CFG_FLAG_R5_LOCKSTEP 0x00000100 +#define PROC_BOOT_CFG_FLAG_R5_TEINIT 0x00000200 +#define PROC_BOOT_CFG_FLAG_R5_NMFI_EN 0x00000400 +#define PROC_BOOT_CFG_FLAG_R5_TCM_RSTBASE 0x00000800 +#define PROC_BOOT_CFG_FLAG_R5_BTCM_EN 0x00001000 +#define PROC_BOOT_CFG_FLAG_R5_ATCM_EN 0x00002000 +/* Available from J7200 SoCs onwards */ +#define PROC_BOOT_CFG_FLAG_R5_MEM_INIT_DIS 0x00004000 +/* Applicable to only AM64x SoCs */ +#define PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE 0x00008000 + +/* R5 TI-SCI Processor Control Flags */ +#define PROC_BOOT_CTRL_FLAG_R5_CORE_HALT 0x00000001 + +/* R5 TI-SCI Processor Status Flags */ +#define PROC_BOOT_STATUS_FLAG_R5_WFE 0x00000001 +#define PROC_BOOT_STATUS_FLAG_R5_WFI 0x00000002 +#define PROC_BOOT_STATUS_FLAG_R5_CLK_GATED 0x00000004 +#define PROC_BOOT_STATUS_FLAG_R5_LOCKSTEP_PERMITTED 0x00000100 +/* Applicable to only AM64x SoCs */ +#define PROC_BOOT_STATUS_FLAG_R5_SINGLECORE_ONLY 0x00000200 + +/** + * struct k3_r5_mem - internal memory structure + * @cpu_addr: MPU virtual address of the memory region + * @bus_addr: Bus address used to access the memory region + * @dev_addr: Device address from remoteproc view + * @size: Size of the memory region + */ +struct k3_r5_mem { + void __iomem *cpu_addr; + phys_addr_t bus_addr; + u32 dev_addr; + size_t size; +}; + +/* + * All cluster mode values are not applicable on all SoCs. The following + * are the modes supported on various SoCs: + * Split mode : AM65x, J721E, J7200 and AM64x SoCs + * LockStep mode : AM65x, J721E and J7200 SoCs + * Single-CPU mode : AM64x SoCs only + */ +enum cluster_mode { + CLUSTER_MODE_SPLIT = 0, + CLUSTER_MODE_LOCKSTEP, + CLUSTER_MODE_SINGLECPU, +}; + +/** + * struct k3_r5_soc_data - match data to handle SoC variations + * @tcm_is_double: flag to denote the larger unified TCMs in certain modes + * @tcm_ecc_autoinit: flag to denote the auto-initialization of TCMs for ECC + * @single_cpu_mode: flag to denote if SoC/IP supports Single-CPU mode + */ +struct k3_r5_soc_data { + bool tcm_is_double; + bool tcm_ecc_autoinit; + bool single_cpu_mode; +}; + +/** + * struct k3_r5_cluster - K3 R5F Cluster structure + * @dev: cached device pointer + * @mode: Mode to configure the Cluster - Split or LockStep + * @cores: list of R5 cores within the cluster + * @soc_data: SoC-specific feature data for a R5FSS + */ +struct k3_r5_cluster { + struct device *dev; + enum cluster_mode mode; + struct list_head cores; + const struct k3_r5_soc_data *soc_data; +}; + +/** + * struct k3_r5_core - K3 R5 core structure + * @elem: linked list item + * @dev: cached device pointer + * @rproc: rproc handle representing this core + * @mem: internal memory regions data + * @sram: on-chip SRAM memory regions data + * @num_mems: number of internal memory regions + * @num_sram: number of on-chip SRAM memory regions + * @reset: reset control handle + * @tsp: TI-SCI processor control handle + * @ti_sci: TI-SCI handle + * @ti_sci_id: TI-SCI device identifier + * @atcm_enable: flag to control ATCM enablement + * @btcm_enable: flag to control BTCM enablement + * @loczrama: flag to dictate which TCM is at device address 0x0 + */ +struct k3_r5_core { + struct list_head elem; + struct device *dev; + struct rproc *rproc; + struct k3_r5_mem *mem; + struct k3_r5_mem *sram; + int num_mems; + int num_sram; + struct reset_control *reset; + struct ti_sci_proc *tsp; + const struct ti_sci_handle *ti_sci; + u32 ti_sci_id; + u32 atcm_enable; + u32 btcm_enable; + u32 loczrama; +}; + +/** + * struct k3_r5_rproc - K3 remote processor state + * @dev: cached device pointer + * @cluster: cached pointer to parent cluster structure + * @mbox: mailbox channel handle + * @client: mailbox client to request the mailbox channel + * @rproc: rproc handle + * @core: cached pointer to r5 core structure being used + * @rmem: reserved memory regions data + * @num_rmems: number of reserved memory regions + */ +struct k3_r5_rproc { + struct device *dev; + struct k3_r5_cluster *cluster; + struct mbox_chan *mbox; + struct mbox_client client; + struct rproc *rproc; + struct k3_r5_core *core; + struct k3_r5_mem *rmem; + int num_rmems; +}; + +/** + * k3_r5_rproc_mbox_callback() - inbound mailbox message handler + * @client: mailbox client pointer used for requesting the mailbox channel + * @data: mailbox payload + * + * This handler is invoked by the OMAP mailbox driver whenever a mailbox + * message is received. Usually, the mailbox payload simply contains + * the index of the virtqueue that is kicked by the remote processor, + * and we let remoteproc core handle it. + * + * In addition to virtqueue indices, we also have some out-of-band values + * that indicate different events. Those values are deliberately very + * large so they don't coincide with virtqueue indices. + */ +static void k3_r5_rproc_mbox_callback(struct mbox_client *client, void *data) +{ + struct k3_r5_rproc *kproc = container_of(client, struct k3_r5_rproc, + client); + struct device *dev = kproc->rproc->dev.parent; + const char *name = kproc->rproc->name; + u32 msg = omap_mbox_message(data); + + dev_dbg(dev, "mbox msg: 0x%x\n", msg); + + switch (msg) { + case RP_MBOX_CRASH: + /* + * remoteproc detected an exception, but error recovery is not + * supported. So, just log this for now + */ + dev_err(dev, "K3 R5F rproc %s crashed\n", name); + break; + case RP_MBOX_ECHO_REPLY: + dev_info(dev, "received echo reply from %s\n", name); + break; + default: + /* silently handle all other valid messages */ + if (msg >= RP_MBOX_READY && msg < RP_MBOX_END_MSG) + return; + if (msg > kproc->rproc->max_notifyid) { + dev_dbg(dev, "dropping unknown message 0x%x", msg); + return; + } + /* msg contains the index of the triggered vring */ + if (rproc_vq_interrupt(kproc->rproc, msg) == IRQ_NONE) + dev_dbg(dev, "no message was found in vqid %d\n", msg); + } +} + +/* kick a virtqueue */ +static void k3_r5_rproc_kick(struct rproc *rproc, int vqid) +{ + struct k3_r5_rproc *kproc = rproc->priv; + struct device *dev = rproc->dev.parent; + mbox_msg_t msg = (mbox_msg_t)vqid; + int ret; + + /* send the index of the triggered virtqueue in the mailbox payload */ + ret = mbox_send_message(kproc->mbox, (void *)msg); + if (ret < 0) + dev_err(dev, "failed to send mailbox message, status = %d\n", + ret); +} + +static int k3_r5_split_reset(struct k3_r5_core *core) +{ + int ret; + + ret = reset_control_assert(core->reset); + if (ret) { + dev_err(core->dev, "local-reset assert failed, ret = %d\n", + ret); + return ret; + } + + ret = core->ti_sci->ops.dev_ops.put_device(core->ti_sci, + core->ti_sci_id); + if (ret) { + dev_err(core->dev, "module-reset assert failed, ret = %d\n", + ret); + if (reset_control_deassert(core->reset)) + dev_warn(core->dev, "local-reset deassert back failed\n"); + } + + return ret; +} + +static int k3_r5_split_release(struct k3_r5_core *core) +{ + int ret; + + ret = core->ti_sci->ops.dev_ops.get_device(core->ti_sci, + core->ti_sci_id); + if (ret) { + dev_err(core->dev, "module-reset deassert failed, ret = %d\n", + ret); + return ret; + } + + ret = reset_control_deassert(core->reset); + if (ret) { + dev_err(core->dev, "local-reset deassert failed, ret = %d\n", + ret); + if (core->ti_sci->ops.dev_ops.put_device(core->ti_sci, + core->ti_sci_id)) + dev_warn(core->dev, "module-reset assert back failed\n"); + } + + return ret; +} + +static int k3_r5_lockstep_reset(struct k3_r5_cluster *cluster) +{ + struct k3_r5_core *core; + int ret; + + /* assert local reset on all applicable cores */ + list_for_each_entry(core, &cluster->cores, elem) { + ret = reset_control_assert(core->reset); + if (ret) { + dev_err(core->dev, "local-reset assert failed, ret = %d\n", + ret); + core = list_prev_entry(core, elem); + goto unroll_local_reset; + } + } + + /* disable PSC modules on all applicable cores */ + list_for_each_entry(core, &cluster->cores, elem) { + ret = core->ti_sci->ops.dev_ops.put_device(core->ti_sci, + core->ti_sci_id); + if (ret) { + dev_err(core->dev, "module-reset assert failed, ret = %d\n", + ret); + goto unroll_module_reset; + } + } + + return 0; + +unroll_module_reset: + list_for_each_entry_continue_reverse(core, &cluster->cores, elem) { + if (core->ti_sci->ops.dev_ops.put_device(core->ti_sci, + core->ti_sci_id)) + dev_warn(core->dev, "module-reset assert back failed\n"); + } + core = list_last_entry(&cluster->cores, struct k3_r5_core, elem); +unroll_local_reset: + list_for_each_entry_from_reverse(core, &cluster->cores, elem) { + if (reset_control_deassert(core->reset)) + dev_warn(core->dev, "local-reset deassert back failed\n"); + } + + return ret; +} + +static int k3_r5_lockstep_release(struct k3_r5_cluster *cluster) +{ + struct k3_r5_core *core; + int ret; + + /* enable PSC modules on all applicable cores */ + list_for_each_entry_reverse(core, &cluster->cores, elem) { + ret = core->ti_sci->ops.dev_ops.get_device(core->ti_sci, + core->ti_sci_id); + if (ret) { + dev_err(core->dev, "module-reset deassert failed, ret = %d\n", + ret); + core = list_next_entry(core, elem); + goto unroll_module_reset; + } + } + + /* deassert local reset on all applicable cores */ + list_for_each_entry_reverse(core, &cluster->cores, elem) { + ret = reset_control_deassert(core->reset); + if (ret) { + dev_err(core->dev, "module-reset deassert failed, ret = %d\n", + ret); + goto unroll_local_reset; + } + } + + return 0; + +unroll_local_reset: + list_for_each_entry_continue(core, &cluster->cores, elem) { + if (reset_control_assert(core->reset)) + dev_warn(core->dev, "local-reset assert back failed\n"); + } + core = list_first_entry(&cluster->cores, struct k3_r5_core, elem); +unroll_module_reset: + list_for_each_entry_from(core, &cluster->cores, elem) { + if (core->ti_sci->ops.dev_ops.put_device(core->ti_sci, + core->ti_sci_id)) + dev_warn(core->dev, "module-reset assert back failed\n"); + } + + return ret; +} + +static inline int k3_r5_core_halt(struct k3_r5_core *core) +{ + return ti_sci_proc_set_control(core->tsp, + PROC_BOOT_CTRL_FLAG_R5_CORE_HALT, 0); +} + +static inline int k3_r5_core_run(struct k3_r5_core *core) +{ + return ti_sci_proc_set_control(core->tsp, + 0, PROC_BOOT_CTRL_FLAG_R5_CORE_HALT); +} + +static int k3_r5_rproc_request_mbox(struct rproc *rproc) +{ + struct k3_r5_rproc *kproc = rproc->priv; + struct mbox_client *client = &kproc->client; + struct device *dev = kproc->dev; + int ret; + + client->dev = dev; + client->tx_done = NULL; + client->rx_callback = k3_r5_rproc_mbox_callback; + client->tx_block = false; + client->knows_txdone = false; + + kproc->mbox = mbox_request_channel(client, 0); + if (IS_ERR(kproc->mbox)) { + ret = -EBUSY; + dev_err(dev, "mbox_request_channel failed: %ld\n", + PTR_ERR(kproc->mbox)); + return ret; + } + + /* + * Ping the remote processor, this is only for sanity-sake for now; + * there is no functional effect whatsoever. + * + * Note that the reply will _not_ arrive immediately: this message + * will wait in the mailbox fifo until the remote processor is booted. + */ + ret = mbox_send_message(kproc->mbox, (void *)RP_MBOX_ECHO_REQUEST); + if (ret < 0) { + dev_err(dev, "mbox_send_message failed: %d\n", ret); + mbox_free_channel(kproc->mbox); + return ret; + } + + return 0; +} + +/* + * The R5F cores have controls for both a reset and a halt/run. The code + * execution from DDR requires the initial boot-strapping code to be run + * from the internal TCMs. This function is used to release the resets on + * applicable cores to allow loading into the TCMs. The .prepare() ops is + * invoked by remoteproc core before any firmware loading, and is followed + * by the .start() ops after loading to actually let the R5 cores run. + * + * The Single-CPU mode on applicable SoCs (eg: AM64x) only uses Core0 to + * execute code, but combines the TCMs from both cores. The resets for both + * cores need to be released to make this possible, as the TCMs are in general + * private to each core. Only Core0 needs to be unhalted for running the + * cluster in this mode. The function uses the same reset logic as LockStep + * mode for this (though the behavior is agnostic of the reset release order). + * This callback is invoked only in remoteproc mode. + */ +static int k3_r5_rproc_prepare(struct rproc *rproc) +{ + struct k3_r5_rproc *kproc = rproc->priv; + struct k3_r5_cluster *cluster = kproc->cluster; + struct k3_r5_core *core = kproc->core; + struct device *dev = kproc->dev; + u32 ctrl = 0, cfg = 0, stat = 0; + u64 boot_vec = 0; + bool mem_init_dis; + int ret; + + ret = ti_sci_proc_get_status(core->tsp, &boot_vec, &cfg, &ctrl, &stat); + if (ret < 0) + return ret; + mem_init_dis = !!(cfg & PROC_BOOT_CFG_FLAG_R5_MEM_INIT_DIS); + + /* Re-use LockStep-mode reset logic for Single-CPU mode */ + ret = (cluster->mode == CLUSTER_MODE_LOCKSTEP || + cluster->mode == CLUSTER_MODE_SINGLECPU) ? + k3_r5_lockstep_release(cluster) : k3_r5_split_release(core); + if (ret) { + dev_err(dev, "unable to enable cores for TCM loading, ret = %d\n", + ret); + return ret; + } + + /* + * Newer IP revisions like on J7200 SoCs support h/w auto-initialization + * of TCMs, so there is no need to perform the s/w memzero. This bit is + * configurable through System Firmware, the default value does perform + * auto-init, but account for it in case it is disabled + */ + if (cluster->soc_data->tcm_ecc_autoinit && !mem_init_dis) { + dev_dbg(dev, "leveraging h/w init for TCM memories\n"); + return 0; + } + + /* + * Zero out both TCMs unconditionally (access from v8 Arm core is not + * affected by ATCM & BTCM enable configuration values) so that ECC + * can be effective on all TCM addresses. + */ + dev_dbg(dev, "zeroing out ATCM memory\n"); + memset(core->mem[0].cpu_addr, 0x00, core->mem[0].size); + + dev_dbg(dev, "zeroing out BTCM memory\n"); + memset(core->mem[1].cpu_addr, 0x00, core->mem[1].size); + + return 0; +} + +/* + * This function implements the .unprepare() ops and performs the complimentary + * operations to that of the .prepare() ops. The function is used to assert the + * resets on all applicable cores for the rproc device (depending on LockStep + * or Split mode). This completes the second portion of powering down the R5F + * cores. The cores themselves are only halted in the .stop() ops, and the + * .unprepare() ops is invoked by the remoteproc core after the remoteproc is + * stopped. + * + * The Single-CPU mode on applicable SoCs (eg: AM64x) combines the TCMs from + * both cores. The access is made possible only with releasing the resets for + * both cores, but with only Core0 unhalted. This function re-uses the same + * reset assert logic as LockStep mode for this mode (though the behavior is + * agnostic of the reset assert order). This callback is invoked only in + * remoteproc mode. + */ +static int k3_r5_rproc_unprepare(struct rproc *rproc) +{ + struct k3_r5_rproc *kproc = rproc->priv; + struct k3_r5_cluster *cluster = kproc->cluster; + struct k3_r5_core *core = kproc->core; + struct device *dev = kproc->dev; + int ret; + + /* Re-use LockStep-mode reset logic for Single-CPU mode */ + ret = (cluster->mode == CLUSTER_MODE_LOCKSTEP || + cluster->mode == CLUSTER_MODE_SINGLECPU) ? + k3_r5_lockstep_reset(cluster) : k3_r5_split_reset(core); + if (ret) + dev_err(dev, "unable to disable cores, ret = %d\n", ret); + + return ret; +} + +/* + * The R5F start sequence includes two different operations + * 1. Configure the boot vector for R5F core(s) + * 2. Unhalt/Run the R5F core(s) + * + * The sequence is different between LockStep and Split modes. The LockStep + * mode requires the boot vector to be configured only for Core0, and then + * unhalt both the cores to start the execution - Core1 needs to be unhalted + * first followed by Core0. The Split-mode requires that Core0 to be maintained + * always in a higher power state that Core1 (implying Core1 needs to be started + * always only after Core0 is started). + * + * The Single-CPU mode on applicable SoCs (eg: AM64x) only uses Core0 to execute + * code, so only Core0 needs to be unhalted. The function uses the same logic + * flow as Split-mode for this. This callback is invoked only in remoteproc + * mode. + */ +static int k3_r5_rproc_start(struct rproc *rproc) +{ + struct k3_r5_rproc *kproc = rproc->priv; + struct k3_r5_cluster *cluster = kproc->cluster; + struct device *dev = kproc->dev; + struct k3_r5_core *core; + u32 boot_addr; + int ret; + + ret = k3_r5_rproc_request_mbox(rproc); + if (ret) + return ret; + + boot_addr = rproc->bootaddr; + /* TODO: add boot_addr sanity checking */ + dev_dbg(dev, "booting R5F core using boot addr = 0x%x\n", boot_addr); + + /* boot vector need not be programmed for Core1 in LockStep mode */ + core = kproc->core; + ret = ti_sci_proc_set_config(core->tsp, boot_addr, 0, 0); + if (ret) + goto put_mbox; + + /* unhalt/run all applicable cores */ + if (cluster->mode == CLUSTER_MODE_LOCKSTEP) { + list_for_each_entry_reverse(core, &cluster->cores, elem) { + ret = k3_r5_core_run(core); + if (ret) + goto unroll_core_run; + } + } else { + ret = k3_r5_core_run(core); + if (ret) + goto put_mbox; + } + + return 0; + +unroll_core_run: + list_for_each_entry_continue(core, &cluster->cores, elem) { + if (k3_r5_core_halt(core)) + dev_warn(core->dev, "core halt back failed\n"); + } +put_mbox: + mbox_free_channel(kproc->mbox); + return ret; +} + +/* + * The R5F stop function includes the following operations + * 1. Halt R5F core(s) + * + * The sequence is different between LockStep and Split modes, and the order + * of cores the operations are performed are also in general reverse to that + * of the start function. The LockStep mode requires each operation to be + * performed first on Core0 followed by Core1. The Split-mode requires that + * Core0 to be maintained always in a higher power state that Core1 (implying + * Core1 needs to be stopped first before Core0). + * + * The Single-CPU mode on applicable SoCs (eg: AM64x) only uses Core0 to execute + * code, so only Core0 needs to be halted. The function uses the same logic + * flow as Split-mode for this. + * + * Note that the R5F halt operation in general is not effective when the R5F + * core is running, but is needed to make sure the core won't run after + * deasserting the reset the subsequent time. The asserting of reset can + * be done here, but is preferred to be done in the .unprepare() ops - this + * maintains the symmetric behavior between the .start(), .stop(), .prepare() + * and .unprepare() ops, and also balances them well between sysfs 'state' + * flow and device bind/unbind or module removal. This callback is invoked + * only in remoteproc mode. + */ +static int k3_r5_rproc_stop(struct rproc *rproc) +{ + struct k3_r5_rproc *kproc = rproc->priv; + struct k3_r5_cluster *cluster = kproc->cluster; + struct k3_r5_core *core = kproc->core; + int ret; + + /* halt all applicable cores */ + if (cluster->mode == CLUSTER_MODE_LOCKSTEP) { + list_for_each_entry(core, &cluster->cores, elem) { + ret = k3_r5_core_halt(core); + if (ret) { + core = list_prev_entry(core, elem); + goto unroll_core_halt; + } + } + } else { + ret = k3_r5_core_halt(core); + if (ret) + goto out; + } + + mbox_free_channel(kproc->mbox); + + return 0; + +unroll_core_halt: + list_for_each_entry_from_reverse(core, &cluster->cores, elem) { + if (k3_r5_core_run(core)) + dev_warn(core->dev, "core run back failed\n"); + } +out: + return ret; +} + +/* + * Attach to a running R5F remote processor (IPC-only mode) + * + * The R5F attach callback only needs to request the mailbox, the remote + * processor is already booted, so there is no need to issue any TI-SCI + * commands to boot the R5F cores in IPC-only mode. This callback is invoked + * only in IPC-only mode. + */ +static int k3_r5_rproc_attach(struct rproc *rproc) +{ + struct k3_r5_rproc *kproc = rproc->priv; + struct device *dev = kproc->dev; + int ret; + + ret = k3_r5_rproc_request_mbox(rproc); + if (ret) + return ret; + + dev_info(dev, "R5F core initialized in IPC-only mode\n"); + return 0; +} + +/* + * Detach from a running R5F remote processor (IPC-only mode) + * + * The R5F detach callback performs the opposite operation to attach callback + * and only needs to release the mailbox, the R5F cores are not stopped and + * will be left in booted state in IPC-only mode. This callback is invoked + * only in IPC-only mode. + */ +static int k3_r5_rproc_detach(struct rproc *rproc) +{ + struct k3_r5_rproc *kproc = rproc->priv; + struct device *dev = kproc->dev; + + mbox_free_channel(kproc->mbox); + dev_info(dev, "R5F core deinitialized in IPC-only mode\n"); + return 0; +} + +/* + * This function implements the .get_loaded_rsc_table() callback and is used + * to provide the resource table for the booted R5F in IPC-only mode. The K3 R5F + * firmwares follow a design-by-contract approach and are expected to have the + * resource table at the base of the DDR region reserved for firmware usage. + * This provides flexibility for the remote processor to be booted by different + * bootloaders that may or may not have the ability to publish the resource table + * address and size through a DT property. This callback is invoked only in + * IPC-only mode. + */ +static struct resource_table *k3_r5_get_loaded_rsc_table(struct rproc *rproc, + size_t *rsc_table_sz) +{ + struct k3_r5_rproc *kproc = rproc->priv; + struct device *dev = kproc->dev; + + if (!kproc->rmem[0].cpu_addr) { + dev_err(dev, "memory-region #1 does not exist, loaded rsc table can't be found"); + return ERR_PTR(-ENOMEM); + } + + /* + * NOTE: The resource table size is currently hard-coded to a maximum + * of 256 bytes. The most common resource table usage for K3 firmwares + * is to only have the vdev resource entry and an optional trace entry. + * The exact size could be computed based on resource table address, but + * the hard-coded value suffices to support the IPC-only mode. + */ + *rsc_table_sz = 256; + return (struct resource_table *)kproc->rmem[0].cpu_addr; +} + +/* + * Internal Memory translation helper + * + * Custom function implementing the rproc .da_to_va ops to provide address + * translation (device address to kernel virtual address) for internal RAMs + * present in a DSP or IPU device). The translated addresses can be used + * either by the remoteproc core for loading, or by any rpmsg bus drivers. + */ +static void *k3_r5_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem) +{ + struct k3_r5_rproc *kproc = rproc->priv; + struct k3_r5_core *core = kproc->core; + void __iomem *va = NULL; + phys_addr_t bus_addr; + u32 dev_addr, offset; + size_t size; + int i; + + if (len == 0) + return NULL; + + /* handle both R5 and SoC views of ATCM and BTCM */ + for (i = 0; i < core->num_mems; i++) { + bus_addr = core->mem[i].bus_addr; + dev_addr = core->mem[i].dev_addr; + size = core->mem[i].size; + + /* handle R5-view addresses of TCMs */ + if (da >= dev_addr && ((da + len) <= (dev_addr + size))) { + offset = da - dev_addr; + va = core->mem[i].cpu_addr + offset; + return (__force void *)va; + } + + /* handle SoC-view addresses of TCMs */ + if (da >= bus_addr && ((da + len) <= (bus_addr + size))) { + offset = da - bus_addr; + va = core->mem[i].cpu_addr + offset; + return (__force void *)va; + } + } + + /* handle any SRAM regions using SoC-view addresses */ + for (i = 0; i < core->num_sram; i++) { + dev_addr = core->sram[i].dev_addr; + size = core->sram[i].size; + + if (da >= dev_addr && ((da + len) <= (dev_addr + size))) { + offset = da - dev_addr; + va = core->sram[i].cpu_addr + offset; + return (__force void *)va; + } + } + + /* handle static DDR reserved memory regions */ + for (i = 0; i < kproc->num_rmems; i++) { + dev_addr = kproc->rmem[i].dev_addr; + size = kproc->rmem[i].size; + + if (da >= dev_addr && ((da + len) <= (dev_addr + size))) { + offset = da - dev_addr; + va = kproc->rmem[i].cpu_addr + offset; + return (__force void *)va; + } + } + + return NULL; +} + +static const struct rproc_ops k3_r5_rproc_ops = { + .prepare = k3_r5_rproc_prepare, + .unprepare = k3_r5_rproc_unprepare, + .start = k3_r5_rproc_start, + .stop = k3_r5_rproc_stop, + .kick = k3_r5_rproc_kick, + .da_to_va = k3_r5_rproc_da_to_va, +}; + +/* + * Internal R5F Core configuration + * + * Each R5FSS has a cluster-level setting for configuring the processor + * subsystem either in a safety/fault-tolerant LockStep mode or a performance + * oriented Split mode on most SoCs. A fewer SoCs support a non-safety mode + * as an alternate for LockStep mode that exercises only a single R5F core + * called Single-CPU mode. Each R5F core has a number of settings to either + * enable/disable each of the TCMs, control which TCM appears at the R5F core's + * address 0x0. These settings need to be configured before the resets for the + * corresponding core are released. These settings are all protected and managed + * by the System Processor. + * + * This function is used to pre-configure these settings for each R5F core, and + * the configuration is all done through various ti_sci_proc functions that + * communicate with the System Processor. The function also ensures that both + * the cores are halted before the .prepare() step. + * + * The function is called from k3_r5_cluster_rproc_init() and is invoked either + * once (in LockStep mode or Single-CPU modes) or twice (in Split mode). Support + * for LockStep-mode is dictated by an eFUSE register bit, and the config + * settings retrieved from DT are adjusted accordingly as per the permitted + * cluster mode. Another eFUSE register bit dictates if the R5F cluster only + * supports a Single-CPU mode. All cluster level settings like Cluster mode and + * TEINIT (exception handling state dictating ARM or Thumb mode) can only be set + * and retrieved using Core0. + * + * The function behavior is different based on the cluster mode. The R5F cores + * are configured independently as per their individual settings in Split mode. + * They are identically configured in LockStep mode using the primary Core0 + * settings. However, some individual settings cannot be set in LockStep mode. + * This is overcome by switching to Split-mode initially and then programming + * both the cores with the same settings, before reconfiguing again for + * LockStep mode. + */ +static int k3_r5_rproc_configure(struct k3_r5_rproc *kproc) +{ + struct k3_r5_cluster *cluster = kproc->cluster; + struct device *dev = kproc->dev; + struct k3_r5_core *core0, *core, *temp; + u32 ctrl = 0, cfg = 0, stat = 0; + u32 set_cfg = 0, clr_cfg = 0; + u64 boot_vec = 0; + bool lockstep_en; + bool single_cpu; + int ret; + + core0 = list_first_entry(&cluster->cores, struct k3_r5_core, elem); + if (cluster->mode == CLUSTER_MODE_LOCKSTEP || + cluster->mode == CLUSTER_MODE_SINGLECPU) { + core = core0; + } else { + core = kproc->core; + } + + ret = ti_sci_proc_get_status(core->tsp, &boot_vec, &cfg, &ctrl, + &stat); + if (ret < 0) + return ret; + + dev_dbg(dev, "boot_vector = 0x%llx, cfg = 0x%x ctrl = 0x%x stat = 0x%x\n", + boot_vec, cfg, ctrl, stat); + + /* check if only Single-CPU mode is supported on applicable SoCs */ + if (cluster->soc_data->single_cpu_mode) { + single_cpu = + !!(stat & PROC_BOOT_STATUS_FLAG_R5_SINGLECORE_ONLY); + if (single_cpu && cluster->mode == CLUSTER_MODE_SPLIT) { + dev_err(cluster->dev, "split-mode not permitted, force configuring for single-cpu mode\n"); + cluster->mode = CLUSTER_MODE_SINGLECPU; + } + goto config; + } + + /* check conventional LockStep vs Split mode configuration */ + lockstep_en = !!(stat & PROC_BOOT_STATUS_FLAG_R5_LOCKSTEP_PERMITTED); + if (!lockstep_en && cluster->mode == CLUSTER_MODE_LOCKSTEP) { + dev_err(cluster->dev, "lockstep mode not permitted, force configuring for split-mode\n"); + cluster->mode = CLUSTER_MODE_SPLIT; + } + +config: + /* always enable ARM mode and set boot vector to 0 */ + boot_vec = 0x0; + if (core == core0) { + clr_cfg = PROC_BOOT_CFG_FLAG_R5_TEINIT; + if (cluster->soc_data->single_cpu_mode) { + /* + * Single-CPU configuration bit can only be configured + * on Core0 and system firmware will NACK any requests + * with the bit configured, so program it only on + * permitted cores + */ + if (cluster->mode == CLUSTER_MODE_SINGLECPU) + set_cfg = PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE; + } else { + /* + * LockStep configuration bit is Read-only on Split-mode + * _only_ devices and system firmware will NACK any + * requests with the bit configured, so program it only + * on permitted devices + */ + if (lockstep_en) + clr_cfg |= PROC_BOOT_CFG_FLAG_R5_LOCKSTEP; + } + } + + if (core->atcm_enable) + set_cfg |= PROC_BOOT_CFG_FLAG_R5_ATCM_EN; + else + clr_cfg |= PROC_BOOT_CFG_FLAG_R5_ATCM_EN; + + if (core->btcm_enable) + set_cfg |= PROC_BOOT_CFG_FLAG_R5_BTCM_EN; + else + clr_cfg |= PROC_BOOT_CFG_FLAG_R5_BTCM_EN; + + if (core->loczrama) + set_cfg |= PROC_BOOT_CFG_FLAG_R5_TCM_RSTBASE; + else + clr_cfg |= PROC_BOOT_CFG_FLAG_R5_TCM_RSTBASE; + + if (cluster->mode == CLUSTER_MODE_LOCKSTEP) { + /* + * work around system firmware limitations to make sure both + * cores are programmed symmetrically in LockStep. LockStep + * and TEINIT config is only allowed with Core0. + */ + list_for_each_entry(temp, &cluster->cores, elem) { + ret = k3_r5_core_halt(temp); + if (ret) + goto out; + + if (temp != core) { + clr_cfg &= ~PROC_BOOT_CFG_FLAG_R5_LOCKSTEP; + clr_cfg &= ~PROC_BOOT_CFG_FLAG_R5_TEINIT; + } + ret = ti_sci_proc_set_config(temp->tsp, boot_vec, + set_cfg, clr_cfg); + if (ret) + goto out; + } + + set_cfg = PROC_BOOT_CFG_FLAG_R5_LOCKSTEP; + clr_cfg = 0; + ret = ti_sci_proc_set_config(core->tsp, boot_vec, + set_cfg, clr_cfg); + } else { + ret = k3_r5_core_halt(core); + if (ret) + goto out; + + ret = ti_sci_proc_set_config(core->tsp, boot_vec, + set_cfg, clr_cfg); + } + +out: + return ret; +} + +static int k3_r5_reserved_mem_init(struct k3_r5_rproc *kproc) +{ + struct device *dev = kproc->dev; + struct device_node *np = dev_of_node(dev); + struct device_node *rmem_np; + struct reserved_mem *rmem; + int num_rmems; + int ret, i; + + num_rmems = of_property_count_elems_of_size(np, "memory-region", + sizeof(phandle)); + if (num_rmems <= 0) { + dev_err(dev, "device does not have reserved memory regions, ret = %d\n", + num_rmems); + return -EINVAL; + } + if (num_rmems < 2) { + dev_err(dev, "device needs at least two memory regions to be defined, num = %d\n", + num_rmems); + return -EINVAL; + } + + /* use reserved memory region 0 for vring DMA allocations */ + ret = of_reserved_mem_device_init_by_idx(dev, np, 0); + if (ret) { + dev_err(dev, "device cannot initialize DMA pool, ret = %d\n", + ret); + return ret; + } + + num_rmems--; + kproc->rmem = kcalloc(num_rmems, sizeof(*kproc->rmem), GFP_KERNEL); + if (!kproc->rmem) { + ret = -ENOMEM; + goto release_rmem; + } + + /* use remaining reserved memory regions for static carveouts */ + for (i = 0; i < num_rmems; i++) { + rmem_np = of_parse_phandle(np, "memory-region", i + 1); + if (!rmem_np) { + ret = -EINVAL; + goto unmap_rmem; + } + + rmem = of_reserved_mem_lookup(rmem_np); + if (!rmem) { + of_node_put(rmem_np); + ret = -EINVAL; + goto unmap_rmem; + } + of_node_put(rmem_np); + + kproc->rmem[i].bus_addr = rmem->base; + /* + * R5Fs do not have an MMU, but have a Region Address Translator + * (RAT) module that provides a fixed entry translation between + * the 32-bit processor addresses to 64-bit bus addresses. The + * RAT is programmable only by the R5F cores. Support for RAT + * is currently not supported, so 64-bit address regions are not + * supported. The absence of MMUs implies that the R5F device + * addresses/supported memory regions are restricted to 32-bit + * bus addresses, and are identical + */ + kproc->rmem[i].dev_addr = (u32)rmem->base; + kproc->rmem[i].size = rmem->size; + kproc->rmem[i].cpu_addr = ioremap_wc(rmem->base, rmem->size); + if (!kproc->rmem[i].cpu_addr) { + dev_err(dev, "failed to map reserved memory#%d at %pa of size %pa\n", + i + 1, &rmem->base, &rmem->size); + ret = -ENOMEM; + goto unmap_rmem; + } + + dev_dbg(dev, "reserved memory%d: bus addr %pa size 0x%zx va %pK da 0x%x\n", + i + 1, &kproc->rmem[i].bus_addr, + kproc->rmem[i].size, kproc->rmem[i].cpu_addr, + kproc->rmem[i].dev_addr); + } + kproc->num_rmems = num_rmems; + + return 0; + +unmap_rmem: + for (i--; i >= 0; i--) + iounmap(kproc->rmem[i].cpu_addr); + kfree(kproc->rmem); +release_rmem: + of_reserved_mem_device_release(dev); + return ret; +} + +static void k3_r5_reserved_mem_exit(struct k3_r5_rproc *kproc) +{ + int i; + + for (i = 0; i < kproc->num_rmems; i++) + iounmap(kproc->rmem[i].cpu_addr); + kfree(kproc->rmem); + + of_reserved_mem_device_release(kproc->dev); +} + +/* + * Each R5F core within a typical R5FSS instance has a total of 64 KB of TCMs, + * split equally into two 32 KB banks between ATCM and BTCM. The TCMs from both + * cores are usable in Split-mode, but only the Core0 TCMs can be used in + * LockStep-mode. The newer revisions of the R5FSS IP maximizes these TCMs by + * leveraging the Core1 TCMs as well in certain modes where they would have + * otherwise been unusable (Eg: LockStep-mode on J7200 SoCs, Single-CPU mode on + * AM64x SoCs). This is done by making a Core1 TCM visible immediately after the + * corresponding Core0 TCM. The SoC memory map uses the larger 64 KB sizes for + * the Core0 TCMs, and the dts representation reflects this increased size on + * supported SoCs. The Core0 TCM sizes therefore have to be adjusted to only + * half the original size in Split mode. + */ +static void k3_r5_adjust_tcm_sizes(struct k3_r5_rproc *kproc) +{ + struct k3_r5_cluster *cluster = kproc->cluster; + struct k3_r5_core *core = kproc->core; + struct device *cdev = core->dev; + struct k3_r5_core *core0; + + if (cluster->mode == CLUSTER_MODE_LOCKSTEP || + cluster->mode == CLUSTER_MODE_SINGLECPU || + !cluster->soc_data->tcm_is_double) + return; + + core0 = list_first_entry(&cluster->cores, struct k3_r5_core, elem); + if (core == core0) { + WARN_ON(core->mem[0].size != SZ_64K); + WARN_ON(core->mem[1].size != SZ_64K); + + core->mem[0].size /= 2; + core->mem[1].size /= 2; + + dev_dbg(cdev, "adjusted TCM sizes, ATCM = 0x%zx BTCM = 0x%zx\n", + core->mem[0].size, core->mem[1].size); + } +} + +/* + * This function checks and configures a R5F core for IPC-only or remoteproc + * mode. The driver is configured to be in IPC-only mode for a R5F core when + * the core has been loaded and started by a bootloader. The IPC-only mode is + * detected by querying the System Firmware for reset, power on and halt status + * and ensuring that the core is running. Any incomplete steps at bootloader + * are validated and errored out. + * + * In IPC-only mode, the driver state flags for ATCM, BTCM and LOCZRAMA settings + * and cluster mode parsed originally from kernel DT are updated to reflect the + * actual values configured by bootloader. The driver internal device memory + * addresses for TCMs are also updated. + */ +static int k3_r5_rproc_configure_mode(struct k3_r5_rproc *kproc) +{ + struct k3_r5_cluster *cluster = kproc->cluster; + struct k3_r5_core *core = kproc->core; + struct device *cdev = core->dev; + bool r_state = false, c_state = false; + u32 ctrl = 0, cfg = 0, stat = 0, halted = 0; + u64 boot_vec = 0; + u32 atcm_enable, btcm_enable, loczrama; + struct k3_r5_core *core0; + enum cluster_mode mode; + int ret; + + core0 = list_first_entry(&cluster->cores, struct k3_r5_core, elem); + + ret = core->ti_sci->ops.dev_ops.is_on(core->ti_sci, core->ti_sci_id, + &r_state, &c_state); + if (ret) { + dev_err(cdev, "failed to get initial state, mode cannot be determined, ret = %d\n", + ret); + return ret; + } + if (r_state != c_state) { + dev_warn(cdev, "R5F core may have been powered on by a different host, programmed state (%d) != actual state (%d)\n", + r_state, c_state); + } + + ret = reset_control_status(core->reset); + if (ret < 0) { + dev_err(cdev, "failed to get initial local reset status, ret = %d\n", + ret); + return ret; + } + + ret = ti_sci_proc_get_status(core->tsp, &boot_vec, &cfg, &ctrl, + &stat); + if (ret < 0) { + dev_err(cdev, "failed to get initial processor status, ret = %d\n", + ret); + return ret; + } + atcm_enable = cfg & PROC_BOOT_CFG_FLAG_R5_ATCM_EN ? 1 : 0; + btcm_enable = cfg & PROC_BOOT_CFG_FLAG_R5_BTCM_EN ? 1 : 0; + loczrama = cfg & PROC_BOOT_CFG_FLAG_R5_TCM_RSTBASE ? 1 : 0; + if (cluster->soc_data->single_cpu_mode) { + mode = cfg & PROC_BOOT_CFG_FLAG_R5_SINGLE_CORE ? + CLUSTER_MODE_SINGLECPU : CLUSTER_MODE_SPLIT; + } else { + mode = cfg & PROC_BOOT_CFG_FLAG_R5_LOCKSTEP ? + CLUSTER_MODE_LOCKSTEP : CLUSTER_MODE_SPLIT; + } + halted = ctrl & PROC_BOOT_CTRL_FLAG_R5_CORE_HALT; + + /* + * IPC-only mode detection requires both local and module resets to + * be deasserted and R5F core to be unhalted. Local reset status is + * irrelevant if module reset is asserted (POR value has local reset + * deasserted), and is deemed as remoteproc mode + */ + if (c_state && !ret && !halted) { + dev_info(cdev, "configured R5F for IPC-only mode\n"); + kproc->rproc->state = RPROC_DETACHED; + ret = 1; + /* override rproc ops with only required IPC-only mode ops */ + kproc->rproc->ops->prepare = NULL; + kproc->rproc->ops->unprepare = NULL; + kproc->rproc->ops->start = NULL; + kproc->rproc->ops->stop = NULL; + kproc->rproc->ops->attach = k3_r5_rproc_attach; + kproc->rproc->ops->detach = k3_r5_rproc_detach; + kproc->rproc->ops->get_loaded_rsc_table = + k3_r5_get_loaded_rsc_table; + } else if (!c_state) { + dev_info(cdev, "configured R5F for remoteproc mode\n"); + ret = 0; + } else { + dev_err(cdev, "mismatched mode: local_reset = %s, module_reset = %s, core_state = %s\n", + !ret ? "deasserted" : "asserted", + c_state ? "deasserted" : "asserted", + halted ? "halted" : "unhalted"); + ret = -EINVAL; + } + + /* fixup TCMs, cluster & core flags to actual values in IPC-only mode */ + if (ret > 0) { + if (core == core0) + cluster->mode = mode; + core->atcm_enable = atcm_enable; + core->btcm_enable = btcm_enable; + core->loczrama = loczrama; + core->mem[0].dev_addr = loczrama ? 0 : K3_R5_TCM_DEV_ADDR; + core->mem[1].dev_addr = loczrama ? K3_R5_TCM_DEV_ADDR : 0; + } + + return ret; +} + +static int k3_r5_cluster_rproc_init(struct platform_device *pdev) +{ + struct k3_r5_cluster *cluster = platform_get_drvdata(pdev); + struct device *dev = &pdev->dev; + struct k3_r5_rproc *kproc; + struct k3_r5_core *core, *core1; + struct device *cdev; + const char *fw_name; + struct rproc *rproc; + int ret, ret1; + + core1 = list_last_entry(&cluster->cores, struct k3_r5_core, elem); + list_for_each_entry(core, &cluster->cores, elem) { + cdev = core->dev; + ret = rproc_of_parse_firmware(cdev, 0, &fw_name); + if (ret) { + dev_err(dev, "failed to parse firmware-name property, ret = %d\n", + ret); + goto out; + } + + rproc = rproc_alloc(cdev, dev_name(cdev), &k3_r5_rproc_ops, + fw_name, sizeof(*kproc)); + if (!rproc) { + ret = -ENOMEM; + goto out; + } + + /* K3 R5s have a Region Address Translator (RAT) but no MMU */ + rproc->has_iommu = false; + /* error recovery is not supported at present */ + rproc->recovery_disabled = true; + + kproc = rproc->priv; + kproc->cluster = cluster; + kproc->core = core; + kproc->dev = cdev; + kproc->rproc = rproc; + core->rproc = rproc; + + ret = k3_r5_rproc_configure_mode(kproc); + if (ret < 0) + goto err_config; + if (ret) + goto init_rmem; + + ret = k3_r5_rproc_configure(kproc); + if (ret) { + dev_err(dev, "initial configure failed, ret = %d\n", + ret); + goto err_config; + } + +init_rmem: + k3_r5_adjust_tcm_sizes(kproc); + + ret = k3_r5_reserved_mem_init(kproc); + if (ret) { + dev_err(dev, "reserved memory init failed, ret = %d\n", + ret); + goto err_config; + } + + ret = rproc_add(rproc); + if (ret) { + dev_err(dev, "rproc_add failed, ret = %d\n", ret); + goto err_add; + } + + /* create only one rproc in lockstep mode or single-cpu mode */ + if (cluster->mode == CLUSTER_MODE_LOCKSTEP || + cluster->mode == CLUSTER_MODE_SINGLECPU) + break; + } + + return 0; + +err_split: + if (rproc->state == RPROC_ATTACHED) { + ret1 = rproc_detach(rproc); + if (ret1) { + dev_err(kproc->dev, "failed to detach rproc, ret = %d\n", + ret1); + return ret1; + } + } + + rproc_del(rproc); +err_add: + k3_r5_reserved_mem_exit(kproc); +err_config: + rproc_free(rproc); + core->rproc = NULL; +out: + /* undo core0 upon any failures on core1 in split-mode */ + if (cluster->mode == CLUSTER_MODE_SPLIT && core == core1) { + core = list_prev_entry(core, elem); + rproc = core->rproc; + kproc = rproc->priv; + goto err_split; + } + return ret; +} + +static void k3_r5_cluster_rproc_exit(void *data) +{ + struct k3_r5_cluster *cluster = platform_get_drvdata(data); + struct k3_r5_rproc *kproc; + struct k3_r5_core *core; + struct rproc *rproc; + int ret; + + /* + * lockstep mode and single-cpu modes have only one rproc associated + * with first core, whereas split-mode has two rprocs associated with + * each core, and requires that core1 be powered down first + */ + core = (cluster->mode == CLUSTER_MODE_LOCKSTEP || + cluster->mode == CLUSTER_MODE_SINGLECPU) ? + list_first_entry(&cluster->cores, struct k3_r5_core, elem) : + list_last_entry(&cluster->cores, struct k3_r5_core, elem); + + list_for_each_entry_from_reverse(core, &cluster->cores, elem) { + rproc = core->rproc; + kproc = rproc->priv; + + if (rproc->state == RPROC_ATTACHED) { + ret = rproc_detach(rproc); + if (ret) { + dev_err(kproc->dev, "failed to detach rproc, ret = %d\n", ret); + return; + } + } + + rproc_del(rproc); + + k3_r5_reserved_mem_exit(kproc); + + rproc_free(rproc); + core->rproc = NULL; + } +} + +static int k3_r5_core_of_get_internal_memories(struct platform_device *pdev, + struct k3_r5_core *core) +{ + static const char * const mem_names[] = {"atcm", "btcm"}; + struct device *dev = &pdev->dev; + struct resource *res; + int num_mems; + int i; + + num_mems = ARRAY_SIZE(mem_names); + core->mem = devm_kcalloc(dev, num_mems, sizeof(*core->mem), GFP_KERNEL); + if (!core->mem) + return -ENOMEM; + + for (i = 0; i < num_mems; i++) { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + mem_names[i]); + if (!res) { + dev_err(dev, "found no memory resource for %s\n", + mem_names[i]); + return -EINVAL; + } + if (!devm_request_mem_region(dev, res->start, + resource_size(res), + dev_name(dev))) { + dev_err(dev, "could not request %s region for resource\n", + mem_names[i]); + return -EBUSY; + } + + /* + * TCMs are designed in general to support RAM-like backing + * memories. So, map these as Normal Non-Cached memories. This + * also avoids/fixes any potential alignment faults due to + * unaligned data accesses when using memcpy() or memset() + * functions (normally seen with device type memory). + */ + core->mem[i].cpu_addr = devm_ioremap_wc(dev, res->start, + resource_size(res)); + if (!core->mem[i].cpu_addr) { + dev_err(dev, "failed to map %s memory\n", mem_names[i]); + return -ENOMEM; + } + core->mem[i].bus_addr = res->start; + + /* + * TODO: + * The R5F cores can place ATCM & BTCM anywhere in its address + * based on the corresponding Region Registers in the System + * Control coprocessor. For now, place ATCM and BTCM at + * addresses 0 and 0x41010000 (same as the bus address on AM65x + * SoCs) based on loczrama setting + */ + if (!strcmp(mem_names[i], "atcm")) { + core->mem[i].dev_addr = core->loczrama ? + 0 : K3_R5_TCM_DEV_ADDR; + } else { + core->mem[i].dev_addr = core->loczrama ? + K3_R5_TCM_DEV_ADDR : 0; + } + core->mem[i].size = resource_size(res); + + dev_dbg(dev, "memory %5s: bus addr %pa size 0x%zx va %pK da 0x%x\n", + mem_names[i], &core->mem[i].bus_addr, + core->mem[i].size, core->mem[i].cpu_addr, + core->mem[i].dev_addr); + } + core->num_mems = num_mems; + + return 0; +} + +static int k3_r5_core_of_get_sram_memories(struct platform_device *pdev, + struct k3_r5_core *core) +{ + struct device_node *np = pdev->dev.of_node; + struct device *dev = &pdev->dev; + struct device_node *sram_np; + struct resource res; + int num_sram; + int i, ret; + + num_sram = of_property_count_elems_of_size(np, "sram", sizeof(phandle)); + if (num_sram <= 0) { + dev_dbg(dev, "device does not use reserved on-chip memories, num_sram = %d\n", + num_sram); + return 0; + } + + core->sram = devm_kcalloc(dev, num_sram, sizeof(*core->sram), GFP_KERNEL); + if (!core->sram) + return -ENOMEM; + + for (i = 0; i < num_sram; i++) { + sram_np = of_parse_phandle(np, "sram", i); + if (!sram_np) + return -EINVAL; + + if (!of_device_is_available(sram_np)) { + of_node_put(sram_np); + return -EINVAL; + } + + ret = of_address_to_resource(sram_np, 0, &res); + of_node_put(sram_np); + if (ret) + return -EINVAL; + + core->sram[i].bus_addr = res.start; + core->sram[i].dev_addr = res.start; + core->sram[i].size = resource_size(&res); + core->sram[i].cpu_addr = devm_ioremap_wc(dev, res.start, + resource_size(&res)); + if (!core->sram[i].cpu_addr) { + dev_err(dev, "failed to parse and map sram%d memory at %pad\n", + i, &res.start); + return -ENOMEM; + } + + dev_dbg(dev, "memory sram%d: bus addr %pa size 0x%zx va %pK da 0x%x\n", + i, &core->sram[i].bus_addr, + core->sram[i].size, core->sram[i].cpu_addr, + core->sram[i].dev_addr); + } + core->num_sram = num_sram; + + return 0; +} + +static +struct ti_sci_proc *k3_r5_core_of_get_tsp(struct device *dev, + const struct ti_sci_handle *sci) +{ + struct ti_sci_proc *tsp; + u32 temp[2]; + int ret; + + ret = of_property_read_u32_array(dev_of_node(dev), "ti,sci-proc-ids", + temp, 2); + if (ret < 0) + return ERR_PTR(ret); + + tsp = devm_kzalloc(dev, sizeof(*tsp), GFP_KERNEL); + if (!tsp) + return ERR_PTR(-ENOMEM); + + tsp->dev = dev; + tsp->sci = sci; + tsp->ops = &sci->ops.proc_ops; + tsp->proc_id = temp[0]; + tsp->host_id = temp[1]; + + return tsp; +} + +static int k3_r5_core_of_init(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev_of_node(dev); + struct k3_r5_core *core; + int ret; + + if (!devres_open_group(dev, k3_r5_core_of_init, GFP_KERNEL)) + return -ENOMEM; + + core = devm_kzalloc(dev, sizeof(*core), GFP_KERNEL); + if (!core) { + ret = -ENOMEM; + goto err; + } + + core->dev = dev; + /* + * Use SoC Power-on-Reset values as default if no DT properties are + * used to dictate the TCM configurations + */ + core->atcm_enable = 0; + core->btcm_enable = 1; + core->loczrama = 1; + + ret = of_property_read_u32(np, "ti,atcm-enable", &core->atcm_enable); + if (ret < 0 && ret != -EINVAL) { + dev_err(dev, "invalid format for ti,atcm-enable, ret = %d\n", + ret); + goto err; + } + + ret = of_property_read_u32(np, "ti,btcm-enable", &core->btcm_enable); + if (ret < 0 && ret != -EINVAL) { + dev_err(dev, "invalid format for ti,btcm-enable, ret = %d\n", + ret); + goto err; + } + + ret = of_property_read_u32(np, "ti,loczrama", &core->loczrama); + if (ret < 0 && ret != -EINVAL) { + dev_err(dev, "invalid format for ti,loczrama, ret = %d\n", ret); + goto err; + } + + core->ti_sci = devm_ti_sci_get_by_phandle(dev, "ti,sci"); + if (IS_ERR(core->ti_sci)) { + ret = PTR_ERR(core->ti_sci); + if (ret != -EPROBE_DEFER) { + dev_err(dev, "failed to get ti-sci handle, ret = %d\n", + ret); + } + core->ti_sci = NULL; + goto err; + } + + ret = of_property_read_u32(np, "ti,sci-dev-id", &core->ti_sci_id); + if (ret) { + dev_err(dev, "missing 'ti,sci-dev-id' property\n"); + goto err; + } + + core->reset = devm_reset_control_get_exclusive(dev, NULL); + if (IS_ERR_OR_NULL(core->reset)) { + ret = PTR_ERR_OR_ZERO(core->reset); + if (!ret) + ret = -ENODEV; + if (ret != -EPROBE_DEFER) { + dev_err(dev, "failed to get reset handle, ret = %d\n", + ret); + } + goto err; + } + + core->tsp = k3_r5_core_of_get_tsp(dev, core->ti_sci); + if (IS_ERR(core->tsp)) { + ret = PTR_ERR(core->tsp); + dev_err(dev, "failed to construct ti-sci proc control, ret = %d\n", + ret); + goto err; + } + + ret = k3_r5_core_of_get_internal_memories(pdev, core); + if (ret) { + dev_err(dev, "failed to get internal memories, ret = %d\n", + ret); + goto err; + } + + ret = k3_r5_core_of_get_sram_memories(pdev, core); + if (ret) { + dev_err(dev, "failed to get sram memories, ret = %d\n", ret); + goto err; + } + + ret = ti_sci_proc_request(core->tsp); + if (ret < 0) { + dev_err(dev, "ti_sci_proc_request failed, ret = %d\n", ret); + goto err; + } + + platform_set_drvdata(pdev, core); + devres_close_group(dev, k3_r5_core_of_init); + + return 0; + +err: + devres_release_group(dev, k3_r5_core_of_init); + return ret; +} + +/* + * free the resources explicitly since driver model is not being used + * for the child R5F devices + */ +static void k3_r5_core_of_exit(struct platform_device *pdev) +{ + struct k3_r5_core *core = platform_get_drvdata(pdev); + struct device *dev = &pdev->dev; + int ret; + + ret = ti_sci_proc_release(core->tsp); + if (ret) + dev_err(dev, "failed to release proc, ret = %d\n", ret); + + platform_set_drvdata(pdev, NULL); + devres_release_group(dev, k3_r5_core_of_init); +} + +static void k3_r5_cluster_of_exit(void *data) +{ + struct k3_r5_cluster *cluster = platform_get_drvdata(data); + struct platform_device *cpdev; + struct k3_r5_core *core, *temp; + + list_for_each_entry_safe_reverse(core, temp, &cluster->cores, elem) { + list_del(&core->elem); + cpdev = to_platform_device(core->dev); + k3_r5_core_of_exit(cpdev); + } +} + +static int k3_r5_cluster_of_init(struct platform_device *pdev) +{ + struct k3_r5_cluster *cluster = platform_get_drvdata(pdev); + struct device *dev = &pdev->dev; + struct device_node *np = dev_of_node(dev); + struct platform_device *cpdev; + struct device_node *child; + struct k3_r5_core *core; + int ret; + + for_each_available_child_of_node(np, child) { + cpdev = of_find_device_by_node(child); + if (!cpdev) { + ret = -ENODEV; + dev_err(dev, "could not get R5 core platform device\n"); + of_node_put(child); + goto fail; + } + + ret = k3_r5_core_of_init(cpdev); + if (ret) { + dev_err(dev, "k3_r5_core_of_init failed, ret = %d\n", + ret); + put_device(&cpdev->dev); + of_node_put(child); + goto fail; + } + + core = platform_get_drvdata(cpdev); + put_device(&cpdev->dev); + list_add_tail(&core->elem, &cluster->cores); + } + + return 0; + +fail: + k3_r5_cluster_of_exit(pdev); + return ret; +} + +static int k3_r5_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev_of_node(dev); + struct k3_r5_cluster *cluster; + const struct k3_r5_soc_data *data; + int ret; + int num_cores; + + data = of_device_get_match_data(&pdev->dev); + if (!data) { + dev_err(dev, "SoC-specific data is not defined\n"); + return -ENODEV; + } + + cluster = devm_kzalloc(dev, sizeof(*cluster), GFP_KERNEL); + if (!cluster) + return -ENOMEM; + + cluster->dev = dev; + /* + * default to most common efuse configurations - Split-mode on AM64x + * and LockStep-mode on all others + */ + cluster->mode = data->single_cpu_mode ? + CLUSTER_MODE_SPLIT : CLUSTER_MODE_LOCKSTEP; + cluster->soc_data = data; + INIT_LIST_HEAD(&cluster->cores); + + ret = of_property_read_u32(np, "ti,cluster-mode", &cluster->mode); + if (ret < 0 && ret != -EINVAL) { + dev_err(dev, "invalid format for ti,cluster-mode, ret = %d\n", + ret); + return ret; + } + + num_cores = of_get_available_child_count(np); + if (num_cores != 2) { + dev_err(dev, "MCU cluster requires both R5F cores to be enabled, num_cores = %d\n", + num_cores); + return -ENODEV; + } + + platform_set_drvdata(pdev, cluster); + + ret = devm_of_platform_populate(dev); + if (ret) { + dev_err(dev, "devm_of_platform_populate failed, ret = %d\n", + ret); + return ret; + } + + ret = k3_r5_cluster_of_init(pdev); + if (ret) { + dev_err(dev, "k3_r5_cluster_of_init failed, ret = %d\n", ret); + return ret; + } + + ret = devm_add_action_or_reset(dev, k3_r5_cluster_of_exit, pdev); + if (ret) + return ret; + + ret = k3_r5_cluster_rproc_init(pdev); + if (ret) { + dev_err(dev, "k3_r5_cluster_rproc_init failed, ret = %d\n", + ret); + return ret; + } + + ret = devm_add_action_or_reset(dev, k3_r5_cluster_rproc_exit, pdev); + if (ret) + return ret; + + return 0; +} + +static const struct k3_r5_soc_data am65_j721e_soc_data = { + .tcm_is_double = false, + .tcm_ecc_autoinit = false, + .single_cpu_mode = false, +}; + +static const struct k3_r5_soc_data j7200_j721s2_soc_data = { + .tcm_is_double = true, + .tcm_ecc_autoinit = true, + .single_cpu_mode = false, +}; + +static const struct k3_r5_soc_data am64_soc_data = { + .tcm_is_double = true, + .tcm_ecc_autoinit = true, + .single_cpu_mode = true, +}; + +static const struct of_device_id k3_r5_of_match[] = { + { .compatible = "ti,am654-r5fss", .data = &am65_j721e_soc_data, }, + { .compatible = "ti,j721e-r5fss", .data = &am65_j721e_soc_data, }, + { .compatible = "ti,j7200-r5fss", .data = &j7200_j721s2_soc_data, }, + { .compatible = "ti,am64-r5fss", .data = &am64_soc_data, }, + { .compatible = "ti,j721s2-r5fss", .data = &j7200_j721s2_soc_data, }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, k3_r5_of_match); + +static struct platform_driver k3_r5_rproc_driver = { + .probe = k3_r5_probe, + .driver = { + .name = "k3_r5_rproc", + .of_match_table = k3_r5_of_match, + }, +}; + +module_platform_driver(k3_r5_rproc_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("TI K3 R5F remote processor driver"); +MODULE_AUTHOR("Suman Anna <s-anna@ti.com>"); |