// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2017-2018, Intel Corporation
* Copyright (C) 2025, Altera Corporation
*/
#include <linux/atomic.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/genalloc.h>
#include <linux/hashtable.h>
#include <linux/idr.h>
#include <linux/io.h>
#include <linux/kfifo.h>
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/firmware/intel/stratix10-smc.h>
#include <linux/firmware/intel/stratix10-svc-client.h>
#include <linux/types.h>
/**
* SVC_NUM_DATA_IN_FIFO - number of struct stratix10_svc_data in the FIFO
*
* SVC_NUM_CHANNEL - number of channel supported by service layer driver
*
* FPGA_CONFIG_DATA_CLAIM_TIMEOUT_MS - claim back the submitted buffer(s)
* from the secure world for FPGA manager to reuse, or to free the buffer(s)
* when all bit-stream data had be send.
*
* FPGA_CONFIG_STATUS_TIMEOUT_SEC - poll the FPGA configuration status,
* service layer will return error to FPGA manager when timeout occurs,
* timeout is set to 30 seconds (30 * 1000) at Intel Stratix10 SoC.
*/
#define SVC_NUM_DATA_IN_FIFO 8
#define SVC_NUM_CHANNEL 4
#define FPGA_CONFIG_DATA_CLAIM_TIMEOUT_MS 2000
#define FPGA_CONFIG_STATUS_TIMEOUT_SEC 30
#define BYTE_TO_WORD_SIZE 4
/* stratix10 service layer clients */
#define STRATIX10_RSU "stratix10-rsu"
#define SOCFPGA_HWMON "socfpga-hwmon"
/* Maximum number of SDM client IDs. */
#define MAX_SDM_CLIENT_IDS 16
/* Client ID for SIP Service Version 1. */
#define SIP_SVC_V1_CLIENT_ID 0x1
/* Maximum number of SDM job IDs. */
#define MAX_SDM_JOB_IDS 16
/* Number of bits used for asynchronous transaction hashing. */
#define ASYNC_TRX_HASH_BITS 3
/*
* Total number of transaction IDs, which is a combination of
* client ID and job ID.
*/
#define TOTAL_TRANSACTION_IDS \
(MAX_SDM_CLIENT_IDS * MAX_SDM_JOB_IDS)
/* Minimum major version of the ATF for Asynchronous transactions. */
#define ASYNC_ATF_MINIMUM_MAJOR_VERSION 0x3
/* Minimum minor version of the ATF for Asynchronous transactions.*/
#define ASYNC_ATF_MINIMUM_MINOR_VERSION 0x0
/* Job ID field in the transaction ID */
#define STRATIX10_JOB_FIELD GENMASK(3, 0)
/* Client ID field in the transaction ID */
#define STRATIX10_CLIENT_FIELD GENMASK(7, 4)
/* Transaction ID mask for Stratix10 service layer */
#define STRATIX10_TRANS_ID_FIELD GENMASK(7, 0)
/* Macro to extract the job ID from a transaction ID. */
#define STRATIX10_GET_JOBID(transaction_id) \
(FIELD_GET(STRATIX10_JOB_FIELD, transaction_id))
/* Macro to set the job ID in a transaction ID. */
#define STRATIX10_SET_JOBID(jobid) \
(FIELD_PREP(STRATIX10_JOB_FIELD, jobid))
/* Macro to set the client ID in a transaction ID. */
#define STRATIX10_SET_CLIENTID(clientid) \
(FIELD_PREP(STRATIX10_CLIENT_FIELD, clientid))
/* Macro to set a transaction ID using a client ID and a job ID. */
#define STRATIX10_SET_TRANSACTIONID(clientid, jobid) \
(STRATIX10_SET_CLIENTID(clientid) | STRATIX10_SET_JOBID(jobid))
/* Macro to set a transaction ID for SIP SMC Async transactions */
#define STRATIX10_SIP_SMC_SET_TRANSACTIONID_X1(transaction_id) \
(FIELD_PREP(STRATIX10_TRANS_ID_FIELD, transaction_id))
/* 10-bit mask for extracting the SDM status code */
#define STRATIX10_SDM_STATUS_MASK GENMASK(9, 0)
/* Macro to get the SDM mailbox error status */
#define STRATIX10_GET_SDM_STATUS_CODE(status) \
(FIELD_GET(STRATIX10_SDM_STATUS_MASK, status))
typedef void (svc_invoke_fn)(unsigned long, unsigned long, unsigned long,
unsigned long, unsigned long, unsigned long,
unsigned long, unsigned long,
struct arm_smccc_res *);
struct stratix10_svc_chan;
/**
* struct stratix10_svc - svc private data
* @stratix10_svc_rsu: pointer to stratix10 RSU device
* @stratix10_svc_hwmon: pointer to stratix10 HWMON device
*/
struct stratix10_svc {
struct platform_device *stratix10_svc_rsu;
struct platform_device *stratix10_svc_hwmon;
};
/**
* struct stratix10_svc_sh_memory - service shared memory structure
* @sync_complete: state for a completion
* @addr: physical address of shared memory block
* @size: size of shared memory block
* @invoke_fn: service clients to handle secure monitor or hypervisor calls
*
* This struct is used to save physical address and size of shared memory
* block. The shared memory blocked is allocated by secure monitor software
* at secure world.
*
* Service layer driver uses the physical address and size to create a memory
* pool, then allocates data buffer from that memory pool for service client.
*/
struct stratix10_svc_sh_memory {
struct completion sync_complete;
unsigned long addr;
unsigned long size;
svc_invoke_fn *invoke_fn;
};
/**
* struct stratix10_svc_data_mem - service memory structure
* @vaddr: virtual address
* @paddr: physical address
* @size: size of memory
* @node: link list head node
*
* This struct is used in a list that keeps track of buffers which have
* been allocated or freed from the memory pool. Service layer driver also
* uses this struct to transfer physical address to virtual address.
*/
struct stratix10_svc_data_mem {
void *vaddr;
phys_addr_t paddr;
size_t size;
struct list_head node;
};
/**
* struct stratix10_svc_data - service data structure
* @chan: service channel
* @paddr: physical address of to be processed payload
* @size: to be processed playload size
* @paddr_output: physical address of processed payload
* @size_output: processed payload size
* @command: service command requested by client
* @flag: configuration type (full or partial)
* @arg: args to be passed via registers and not physically mapped buffers
*
* This struct is used in service FIFO for inter-process communication.
*/
struct stratix10_svc_data {
struct stratix10_svc_chan *chan;
phys_addr_t paddr;
size_t size;
phys_addr_t paddr_output;
size_t size_output;
u32 command;
u32 flag;
u64 arg[3];
};
/**
* struct stratix10_svc_async_handler - Asynchronous handler for Stratix10
* service layer
* @transaction_id: Unique identifier for the transaction
* @achan: Pointer to the asynchronous channel structure
* @cb_arg: Argument to be passed to the callback function
* @cb: Callback function to be called upon completion
* @msg: Pointer to the client message structure
* @next: Node in the hash list
* @res: Response structure to store result from the secure firmware
*
* This structure is used to handle asynchronous transactions in the
* Stratix10 service layer. It maintains the necessary information
* for processing and completing asynchronous requests.
*/
struct stratix10_svc_async_handler {
u8 transaction_id;
struct stratix10_async_chan *achan;
void *cb_arg;
async_callback_t cb;
struct stratix10_svc_client_msg *msg;
struct hlist_node next;
struct arm_smccc_1_2_regs res;
};
/**
* struct stratix10_async_chan - Structure representing an asynchronous channel
* @async_client_id: Unique client identifier for the asynchronous operation
* @job_id_pool: Pointer to the job ID pool associated with this channel
*/
struct stratix10_async_chan {
unsigned long async_client_id;
struct ida job_id_pool;
};
/**
* struct stratix10_async_ctrl - Control structure for Stratix10
* asynchronous operations
* @supported: Flag indicating whether the system supports async operations
* @initialized: Flag indicating whether the control structure has
* been initialized
* @invoke_fn: Function pointer for invoking Stratix10 service calls
* to EL3 secure firmware
* @async_id_pool: Pointer to the ID pool used for asynchronous
* operations
* @common_achan_refcount: Atomic reference count for the common
* asynchronous channel usage
* @common_async_chan: Pointer to the common asynchronous channel
* structure
* @trx_list_lock: Spinlock for protecting the transaction list
* operations
* @trx_list: Hash table for managing asynchronous transactions
*/
struct stratix10_async_ctrl {
bool supported;
bool initialized;
void (*invoke_fn)(struct stratix10_async_ctrl *actrl,
const struct arm_smccc_1_2_regs *args,
struct arm_smccc_1_2_regs *res);
struct ida async_id_pool;
atomic_t common_achan_refcount;
struct stratix10_async_chan *common_async_chan;
/* spinlock to protect trx_list hash table */
spinlock_t trx_list_lock;
DECLARE_HASHTABLE(trx_list, ASYNC_TRX_HASH_BITS);
};
/**
* struct stratix10_svc_chan - service communication channel
* @ctrl: pointer to service controller which is the provider of this channel
* @scl: pointer to service client which owns the channel
* @name: service client name associated with the channel
* @task: pointer to the thread task which handles SMC or HVC call
* @svc_fifo: a queue for storing service message data (separate fifo for every channel)
* @svc_fifo_lock: protect access to service message data queue (locking pending fifo)
* @lock: protect access to the channel
* @async_chan: reference to asynchronous channel object for this channel
*
* This struct is used by service client to communicate with service layer.
* Each service client has its own channel created by service controller.
*/
struct stratix10_svc_chan {
struct stratix10_svc_controller *ctrl;
struct stratix10_svc_client *scl;
char *name;
struct task_struct *task;
struct kfifo svc_fifo;
spinlock_t svc_fifo_lock;
spinlock_t lock;
struct stratix10_async_chan *async_chan;
};
/**
* struct stratix10_svc_controller - service controller
* @dev: device
* @num_chans: number of channels in 'chans' array
* @num_active_client: number of active service client
* @node: list management
* @genpool: memory pool pointing to the memory region
* @complete_status: state for completion
* @invoke_fn: function to issue secure monitor call or hypervisor call
* @svc: manages the list of client svc drivers
* @sdm_lock: only allows a single command single response to SDM
* @actrl: async control structure
* @chans: array of service channels
*
* This struct is used to create communication channels for service clients, to
* handle secure monitor or hypervisor call.
*/
struct stratix10_svc_controller {
struct device *dev;
int num_chans;
int num_active_client;
struct list_head node;
struct gen_pool *genpool;
struct completion complete_status;
svc_invoke_fn *invoke_fn;
struct stratix10_svc *svc;
struct mutex sdm_lock;
struct stratix10_async_ctrl actrl;
struct stratix10_svc_chan chans[] __counted_by(num_chans);
};
static LIST_HEAD(svc_ctrl);
static LIST_HEAD(svc_data_mem);
/*
* svc_mem_lock protects access to the svc_data_mem list for
* concurrent multi-client operations
*/
static DEFINE_MUTEX(svc_mem_lock);
/**
* svc_pa_to_va() - translate physical address to virtual address
* @addr: to be translated physical address
*
* Return: valid virtual address or NULL if the provided physical
* address doesn't exist.
*/
static void *svc_pa_to_va(unsigned long addr)
{
struct stratix10_svc_data_mem *pmem;
pr_debug("claim back P-addr=0x%016x\n", (unsigned int)addr);
guard(mutex)(&svc_mem_lock);
list_for_each_entry(pmem, &svc_data_mem, node)
if (pmem->paddr == addr)
return pmem->vaddr;
/* physical address is not found */
return NULL;
}
/**
* svc_thread_cmd_data_claim() - claim back buffer from the secure world
* @ctrl: pointer to service layer controller
* @p_data: pointer to service data structure
* @cb_data: pointer to callback data structure to service client
*
* Claim back the submitted buffers from the secure world and pass buffer
* back to service client (FPGA manager, etc) for reuse.
*/
static void svc_thread_cmd_data_claim(struct stratix10_svc_controller *ctrl,
struct stratix10_svc_data *p_data,
struct stratix10_svc_cb_data *cb_data)
{
struct arm_smccc_res res;
unsigned long timeout;
reinit_completion(&ctrl->complete_status);
timeout = msecs_to_jiffies(FPGA_CONFIG_DATA_CLAIM_TIMEOUT_MS);
pr_debug("%s: claim back the submitted buffer\n", __func__);
do {
ctrl->invoke_fn(INTEL_SIP_SMC_FPGA_CONFIG_COMPLETED_WRITE,
0, 0, 0, 0, 0, 0, 0, &res);
if (res.a0 == INTEL_SIP_SMC_STATUS_OK) {
if (!res.a1) {
complete(&ctrl->complete_status);
break;
}
cb_data->status = BIT(SVC_STATUS_BUFFER_DONE);
cb_data->kaddr1 = svc_pa_to_va(res.a1);
cb_data->kaddr2 = (res.a2) ?
svc_pa_to_va(res.a2) : NULL;
cb_data->kaddr3 = (res.a3) ?
svc_pa_to_va(res.a3) : NULL;
p_data->chan->scl->receive_cb(p_data->chan->scl,
cb_data);
} else {
pr_debug("%s: secure world busy, polling again\n",
__func__);
}
} while (res.a0 == INTEL_SIP_SMC_STATUS_OK ||
res.a0 == INTEL_SIP_SMC_STATUS_BUSY ||
wait_for_completion_timeout(&ctrl->complete_status, timeout));
}
/**
* svc_thread_cmd_config_status() - check configuration status
* @ctrl: pointer to service layer controller
* @p_data: pointer to service data structure
* @cb_data: pointer to callback data structure to service client
*
* Check whether the secure firmware at secure world has finished the FPGA
* configuration, and then inform FPGA manager the configuration status.
*/
static void svc_thread_cmd_config_status(struct stratix10_svc_controller *ctrl,
struct stratix10_svc_data *p_data,
struct stratix10_svc_cb_data *cb_data)
{
struct arm_smccc_res res;
int count_in_sec;
unsigned long a0, a1, a2;
cb_data->kaddr1 = NULL;
cb_data->kaddr2 = NULL;
cb_data->kaddr3 = NULL;
cb_data->status = BIT(SVC_STATUS_ERROR);
pr_debug("%s: polling config status\n", __func__);
a0 = INTEL_SIP_SMC_FPGA_CONFIG_ISDONE;
a1 = (unsigned long)p_data->paddr;
a2 = (unsigned long)p_data->size;
if (p_data->command == COMMAND_POLL_SERVICE_STATUS)
a0 = INTEL_SIP_SMC_SERVICE_COMPLETED;
count_in_sec = FPGA_CONFIG_STATUS_TIMEOUT_SEC;
while (count_in_sec) {
ctrl->invoke_fn(a0, a1, a2, 0, 0, 0, 0, 0, &res);
if ((res.a0 == INTEL_SIP_SMC_STATUS_OK) ||
(res.a0 == INTEL_SIP_SMC_STATUS_ERROR) ||
(res.a0 == INTEL_SIP_SMC_STATUS_REJECTED))
break;
/*
* request is still in progress, wait one second then
* poll again
*/
msleep(1000);
count_in_sec--;
}
if (!count_in_sec) {
pr_err("%s: poll status timeout\n", __func__);
cb_data->status = BIT(SVC_STATUS_BUSY);
} else if (res.a0 == INTEL_SIP_SMC_STATUS_OK) {
cb_data->status = BIT(SVC_STATUS_COMPLETED);
cb_data->kaddr2 = (res.a2) ?
svc_pa_to_va(res.a2) : NULL;
cb_data->kaddr3 = (res.a3) ? &res.a3 : NULL;
} else {
pr_err("%s: poll status error\n", __func__);
cb_data->kaddr1 = &res.a1;
cb_data->kaddr2 = (res.a2) ?
svc_pa_to_va(res.a2) : NULL;
cb_data->kaddr3 = (res.a3) ? &res.a3 : NULL;
cb_data->status = BIT(SVC_STATUS_ERROR);
}
p_data->chan->scl->receive_cb(p_data->chan->scl, cb_data);
}
/**
* svc_thread_recv_status_ok() - handle the successful status
* @p_data: pointer to service data structure
* @cb_data: pointer to callback data structure to service client
* @res: result from SMC or HVC call (a0-a3; used for routing and most commands)
* @res12: full v1.2 result for %COMMAND_RSU_GET_DEVICE_INFO, else NULL
*
* Send back the correspond status to the service clients.
*/
static void svc_thread_recv_status_ok(struct stratix10_svc_data *p_data,
struct stratix10_svc_cb_data *cb_data,
struct arm_smccc_res res,
struct arm_smccc_1_2_regs *res12)
{
cb_data->kaddr1 = NULL;
cb_data->kaddr2 = NULL;
cb_data->kaddr3 = NULL;
switch (p_data->command) {
case COMMAND_RECONFIG:
case COMMAND_RSU_UPDATE:
case COMMAND_RSU_NOTIFY:
case COMMAND_FCS_REQUEST_SERVICE:
case COMMAND_FCS_SEND_CERTIFICATE:
case COMMAND_FCS_DATA_ENCRYPTION:
case COMMAND_FCS_DATA_DECRYPTION:
case COMMAND_FCS_GET_PROVISION_DATA:
cb_data->status = BIT(SVC_STATUS_OK);
break;
case COMMAND_RECONFIG_DATA_SUBMIT:
cb_data->status = BIT(SVC_STATUS_BUFFER_SUBMITTED);
break;
case COMMAND_RECONFIG_STATUS:
cb_data->status = BIT(SVC_STATUS_COMPLETED);
break;
case COMMAND_RSU_RETRY:
case COMMAND_RSU_MAX_RETRY:
case COMMAND_RSU_DCMF_STATUS:
case COMMAND_FIRMWARE_VERSION:
case COMMAND_HWMON_READTEMP:
case COMMAND_HWMON_READVOLT:
cb_data->status = BIT(SVC_STATUS_OK);
cb_data->kaddr1 = &res.a1;
break;
case COMMAND_SMC_SVC_VERSION:
cb_data->status = BIT(SVC_STATUS_OK);
cb_data->kaddr1 = &res.a1;
cb_data->kaddr2 = &res.a2;
break;
case COMMAND_SMC_ATF_BUILD_VER:
cb_data->status = BIT(SVC_STATUS_OK);
cb_data->kaddr1 = &res.a1;
cb_data->kaddr2 = &res.a2;
cb_data->kaddr3 = &res.a3;
break;
case COMMAND_RSU_DCMF_VERSION:
cb_data->status = BIT(SVC_STATUS_OK);
cb_data->kaddr1 = &res.a1;
cb_data->kaddr2 = &res.a2;
break;
case COMMAND_FCS_RANDOM_NUMBER_GEN:
case COMMAND_POLL_SERVICE_STATUS:
cb_data->status = BIT(SVC_STATUS_OK);
cb_data->kaddr1 = &res.a1;
cb_data->kaddr2 = svc_pa_to_va(res.a2);
cb_data->kaddr3 = &res.a3;
break;
case COMMAND_MBOX_SEND_CMD:
cb_data->status = BIT(SVC_STATUS_OK);
cb_data->kaddr1 = &res.a1;
/* SDM return size in u8. Convert size to u32 word */
res.a2 = res.a2 * BYTE_TO_WORD_SIZE;
cb_data->kaddr2 = &res.a2;
break;
case COMMAND_RSU_GET_DEVICE_INFO:
if (WARN_ON(!res12)) {
cb_data->status = BIT(SVC_STATUS_ERROR);
break;
}
cb_data->status = BIT(SVC_STATUS_OK);
cb_data->kaddr1 = res12;
cb_data->kaddr2 = NULL;
cb_data->kaddr3 = NULL;
break;
default:
pr_warn("it shouldn't happen\n");
break;
}
pr_debug("%s: call receive_cb\n", __func__);
p_data->chan->scl->receive_cb(p_data->chan->scl, cb_data);
}
static void svc_smccc_1_2_full(struct stratix10_svc_controller *ctrl,
const struct arm_smccc_1_2_regs *args,
struct arm_smccc_1_2_regs *res);
/**
* svc_normal_to_secure_thread() - the function to run in the kthread
* @data: data pointer for kthread function
*
* Service layer driver creates stratix10_svc_smc_hvc_call kthread on CPU
* node 0, its function stratix10_svc_secure_call_thread is used to handle
* SMC or HVC calls between kernel driver and secure monitor software.
*
* Return: 0 for success or -ENOMEM on error.
*/
static int svc_normal_to_secure_thread(void *data)
{
struct stratix10_svc_chan *chan = (struct stratix10_svc_chan *)data;
struct stratix10_svc_controller *ctrl = chan->ctrl;
struct stratix10_svc_data *pdata = NULL;
struct stratix10_svc_cb_data *cbdata = NULL;
struct arm_smccc_res res;
struct arm_smccc_1_2_regs res12 = { 0 };
unsigned long a0, a1, a2, a3, a4, a5, a6, a7;
int ret_fifo = 0;
pdata = kmalloc_obj(*pdata);
if (!pdata)
return -ENOMEM;
cbdata = kmalloc_obj(*cbdata);
if (!cbdata) {
kfree(pdata);
return -ENOMEM;
}
/* default set, to remove build warning */
a0 = INTEL_SIP_SMC_FPGA_CONFIG_LOOPBACK;
a1 = 0;
a2 = 0;
a3 = 0;
a4 = 0;
a5 = 0;
a6 = 0;
a7 = 0;
pr_debug("%s: %s: Thread is running!\n", __func__, chan->name);
while (!kthread_should_stop()) {
ret_fifo = kfifo_out_spinlocked(&chan->svc_fifo,
pdata, sizeof(*pdata),
&chan->svc_fifo_lock);
if (!ret_fifo)
continue;
pr_debug("get from FIFO pa=0x%016x, command=%u, size=%u\n",
(unsigned int)pdata->paddr, pdata->command,
(unsigned int)pdata->size);
/* SDM can only process one command at a time */
pr_debug("%s: %s: Thread is waiting for mutex!\n",
__func__, chan->name);
if (mutex_lock_interruptible(&ctrl->sdm_lock)) {
/* item already dequeued; notify client to unblock it */
cbdata->status = BIT(SVC_STATUS_ERROR);
cbdata->kaddr1 = NULL;
cbdata->kaddr2 = NULL;
cbdata->kaddr3 = NULL;
if (pdata->chan->scl)
pdata->chan->scl->receive_cb(pdata->chan->scl,
cbdata);
break;
}
switch (pdata->command) {
case COMMAND_RECONFIG_DATA_CLAIM:
svc_thread_cmd_data_claim(ctrl, pdata, cbdata);
mutex_unlock(&ctrl->sdm_lock);
continue;
case COMMAND_RECONFIG:
a0 = INTEL_SIP_SMC_FPGA_CONFIG_START;
pr_debug("conf_type=%u\n", (unsigned int)pdata->flag);
a1 = pdata->flag;
a2 = 0;
break;
case COMMAND_RECONFIG_DATA_SUBMIT:
a0 = INTEL_SIP_SMC_FPGA_CONFIG_WRITE;
a1 = (unsigned long)pdata->paddr;
a2 = (unsigned long)pdata->size;
break;
case COMMAND_RECONFIG_STATUS:
a0 = INTEL_SIP_SMC_FPGA_CONFIG_ISDONE;
a1 = 0;
a2 = 0;
break;
case COMMAND_RSU_STATUS:
a0 = INTEL_SIP_SMC_RSU_STATUS;
a1 = 0;
a2 = 0;
break;
case COMMAND_RSU_UPDATE:
a0 = INTEL_SIP_SMC_RSU_UPDATE;
a1 = pdata->arg[0];
a2 = 0;
break;
case COMMAND_RSU_NOTIFY:
a0 = INTEL_SIP_SMC_RSU_NOTIFY;
a1 = pdata->arg[0];
a2 = 0;
break;
case COMMAND_RSU_RETRY:
a0 = INTEL_SIP_SMC_RSU_RETRY_COUNTER;
a1 = 0;
a2 = 0;
break;
case COMMAND_RSU_MAX_RETRY:
a0 = INTEL_SIP_SMC_RSU_MAX_RETRY;
a1 = 0;
a2 = 0;
break;
case COMMAND_RSU_DCMF_VERSION:
a0 = INTEL_SIP_SMC_RSU_DCMF_VERSION;
a1 = 0;
a2 = 0;
break;
case COMMAND_FIRMWARE_VERSION:
a0 = INTEL_SIP_SMC_FIRMWARE_VERSION;
a1 = 0;
a2 = 0;
break;
/* for FCS */
case COMMAND_FCS_DATA_ENCRYPTION:
a0 = INTEL_SIP_SMC_FCS_CRYPTION;
a1 = 1;
a2 = (unsigned long)pdata->paddr;
a3 = (unsigned long)pdata->size;
a4 = (unsigned long)pdata->paddr_output;
a5 = (unsigned long)pdata->size_output;
break;
case COMMAND_FCS_DATA_DECRYPTION:
a0 = INTEL_SIP_SMC_FCS_CRYPTION;
a1 = 0;
a2 = (unsigned long)pdata->paddr;
a3 = (unsigned long)pdata->size;
a4 = (unsigned long)pdata->paddr_output;
a5 = (unsigned long)pdata->size_output;
break;
case COMMAND_FCS_RANDOM_NUMBER_GEN:
a0 = INTEL_SIP_SMC_FCS_RANDOM_NUMBER;
a1 = (unsigned long)pdata->paddr;
a2 = 0;
break;
case COMMAND_FCS_REQUEST_SERVICE:
a0 = INTEL_SIP_SMC_FCS_SERVICE_REQUEST;
a1 = (unsigned long)pdata->paddr;
a2 = (unsigned long)pdata->size;
break;
case COMMAND_FCS_SEND_CERTIFICATE:
a0 = INTEL_SIP_SMC_FCS_SEND_CERTIFICATE;
a1 = (unsigned long)pdata->paddr;
a2 = (unsigned long)pdata->size;
break;
case COMMAND_FCS_GET_PROVISION_DATA:
a0 = INTEL_SIP_SMC_FCS_GET_PROVISION_DATA;
a1 = 0;
a2 = 0;
break;
/* for HWMON */
case COMMAND_HWMON_READTEMP:
a0 = INTEL_SIP_SMC_HWMON_READTEMP;
a1 = pdata->arg[0];
a2 = 0;
break;
case COMMAND_HWMON_READVOLT:
a0 = INTEL_SIP_SMC_HWMON_READVOLT;
a1 = pdata->arg[0];
a2 = 0;
break;
/* for polling */
case COMMAND_POLL_SERVICE_STATUS:
a0 = INTEL_SIP_SMC_SERVICE_COMPLETED;
a1 = (unsigned long)pdata->paddr;
a2 = (unsigned long)pdata->size;
break;
case COMMAND_RSU_DCMF_STATUS:
a0 = INTEL_SIP_SMC_RSU_DCMF_STATUS;
a1 = 0;
a2 = 0;
break;
case COMMAND_SMC_SVC_VERSION:
a0 = INTEL_SIP_SMC_SVC_VERSION;
a1 = 0;
a2 = 0;
break;
case COMMAND_SMC_ATF_BUILD_VER:
a0 = INTEL_SIP_SMC_ATF_BUILD_VER;
a1 = 0;
a2 = 0;
a3 = 0;
break;
case COMMAND_MBOX_SEND_CMD:
a0 = INTEL_SIP_SMC_MBOX_SEND_CMD;
a1 = pdata->arg[0];
a2 = (unsigned long)pdata->paddr;
a3 = (unsigned long)pdata->size / BYTE_TO_WORD_SIZE;
a4 = pdata->arg[1];
a5 = (unsigned long)pdata->paddr_output;
a6 = (unsigned long)pdata->size_output / BYTE_TO_WORD_SIZE;
break;
case COMMAND_RSU_GET_DEVICE_INFO:
a0 = INTEL_SIP_SMC_RSU_GET_DEVICE_INFO;
a1 = 0;
a2 = 0;
a3 = 0;
a4 = 0;
a5 = 0;
a6 = 0;
a7 = 0;
break;
default:
pr_warn("it shouldn't happen\n");
mutex_unlock(&ctrl->sdm_lock);
continue;
}
pr_debug("%s: %s: before SMC call -- a0=0x%016x a1=0x%016x",
__func__, chan->name,
(unsigned int)a0,
(unsigned int)a1);
pr_debug(" a2=0x%016x\n", (unsigned int)a2);
pr_debug(" a3=0x%016x\n", (unsigned int)a3);
pr_debug(" a4=0x%016x\n", (unsigned int)a4);
pr_debug(" a5=0x%016x\n", (unsigned int)a5);
if (pdata->command == COMMAND_RSU_GET_DEVICE_INFO) {
struct arm_smccc_1_2_regs args12 = { 0 };
args12.a0 = INTEL_SIP_SMC_RSU_GET_DEVICE_INFO;
svc_smccc_1_2_full(ctrl, &args12, &res12);
res.a0 = res12.a0;
res.a1 = res12.a1;
res.a2 = res12.a2;
res.a3 = res12.a3;
} else {
ctrl->invoke_fn(a0, a1, a2, a3, a4, a5, a6, a7, &res);
}
pr_debug("%s: %s: after SMC call -- res.a0=0x%016x",
__func__, chan->name, (unsigned int)res.a0);
pr_debug(" res.a1=0x%016x, res.a2=0x%016x",
(unsigned int)res.a1, (unsigned int)res.a2);
pr_debug(" res.a3=0x%016x\n", (unsigned int)res.a3);
if (pdata->command == COMMAND_RSU_STATUS) {
if (res.a0 == INTEL_SIP_SMC_RSU_ERROR)
cbdata->status = BIT(SVC_STATUS_ERROR);
else
cbdata->status = BIT(SVC_STATUS_OK);
cbdata->kaddr1 = &res;
cbdata->kaddr2 = NULL;
cbdata->kaddr3 = NULL;
pdata->chan->scl->receive_cb(pdata->chan->scl, cbdata);
mutex_unlock(&ctrl->sdm_lock);
continue;
}
switch (res.a0) {
case INTEL_SIP_SMC_STATUS_OK: {
struct arm_smccc_1_2_regs *devinfo_res =
(pdata->command == COMMAND_RSU_GET_DEVICE_INFO) ?
&res12 : NULL;
svc_thread_recv_status_ok(pdata, cbdata, res,
devinfo_res);
break;
}
case INTEL_SIP_SMC_STATUS_BUSY:
switch (pdata->command) {
case COMMAND_RECONFIG_DATA_SUBMIT:
svc_thread_cmd_data_claim(ctrl,
pdata, cbdata);
break;
case COMMAND_RECONFIG_STATUS:
case COMMAND_POLL_SERVICE_STATUS:
svc_thread_cmd_config_status(ctrl,
pdata, cbdata);
break;
default:
pr_warn("it shouldn't happen\n");
break;
}
break;
case INTEL_SIP_SMC_STATUS_REJECTED:
pr_debug("%s: STATUS_REJECTED\n", __func__);
/* for FCS */
switch (pdata->command) {
case COMMAND_FCS_REQUEST_SERVICE:
case COMMAND_FCS_SEND_CERTIFICATE:
case COMMAND_FCS_GET_PROVISION_DATA:
case COMMAND_FCS_DATA_ENCRYPTION:
case COMMAND_FCS_DATA_DECRYPTION:
case COMMAND_FCS_RANDOM_NUMBER_GEN:
case COMMAND_MBOX_SEND_CMD:
cbdata->status = BIT(SVC_STATUS_INVALID_PARAM);
cbdata->kaddr1 = NULL;
cbdata->kaddr2 = NULL;
cbdata->kaddr3 = NULL;
pdata->chan->scl->receive_cb(pdata->chan->scl,
cbdata);
break;
}
break;
case INTEL_SIP_SMC_STATUS_ERROR:
case INTEL_SIP_SMC_RSU_ERROR:
pr_err("%s: STATUS_ERROR\n", __func__);
cbdata->status = BIT(SVC_STATUS_ERROR);
if (pdata->command == COMMAND_RSU_GET_DEVICE_INFO) {
cbdata->kaddr1 = &res12;
cbdata->kaddr2 = NULL;
cbdata->kaddr3 = NULL;
} else {
cbdata->kaddr1 = &res.a1;
cbdata->kaddr2 = (res.a2) ?
svc_pa_to_va(res.a2) : NULL;
cbdata->kaddr3 = (res.a3) ? &res.a3 : NULL;
}
pdata->chan->scl->receive_cb(pdata->chan->scl, cbdata);
break;
default:
pr_warn("Secure firmware doesn't support...\n");
/*
* be compatible with older version firmware which
* doesn't support newer RSU commands
*/
if ((pdata->command != COMMAND_RSU_UPDATE) &&
(pdata->command != COMMAND_RSU_STATUS)) {
cbdata->status =
BIT(SVC_STATUS_NO_SUPPORT);
cbdata->kaddr1 = NULL;
cbdata->kaddr2 = NULL;
cbdata->kaddr3 = NULL;
pdata->chan->scl->receive_cb(
pdata->chan->scl, cbdata);
}
break;
}
mutex_unlock(&ctrl->sdm_lock);
}
kfree(cbdata);
kfree(pdata);
return 0;
}
/**
* svc_normal_to_secure_shm_thread() - the function to run in the kthread
* @data: data pointer for kthread function
*
* Service layer driver creates stratix10_svc_smc_hvc_shm kthread on CPU
* node 0, its function stratix10_svc_secure_shm_thread is used to query the
* physical address of memory block reserved by secure monitor software at
* secure world.
*
* svc_normal_to_secure_shm_thread() terminates directly since it is a
* standlone thread for which no one will call kthread_stop() or return when
* 'kthread_should_stop()' is true.
*/
static int svc_normal_to_secure_shm_thread(void *data)
{
struct stratix10_svc_sh_memory
*sh_mem = (struct stratix10_svc_sh_memory *)data;
struct arm_smccc_res res;
/* SMC or HVC call to get shared memory info from secure world */
sh_mem->invoke_fn(INTEL_SIP_SMC_FPGA_CONFIG_GET_MEM,
0, 0, 0, 0, 0, 0, 0, &res);
if (res.a0 == INTEL_SIP_SMC_STATUS_OK) {
sh_mem->addr = res.a1;
sh_mem->size = res.a2;
} else {
pr_err("%s: after SMC call -- res.a0=0x%016x", __func__,
(unsigned int)res.a0);
sh_mem->addr = 0;
sh_mem->size = 0;
}
complete(&sh_mem->sync_complete);
return 0;
}
/**
* svc_get_sh_memory() - get memory block reserved by secure monitor SW
* @pdev: pointer to service layer device
* @sh_memory: pointer to service shared memory structure
*
* Return: zero for successfully getting the physical address of memory block
* reserved by secure monitor software, or negative value on error.
*/
static int svc_get_sh_memory(struct platform_device *pdev,
struct stratix10_svc_sh_memory *sh_memory)
{
struct device *dev = &pdev->dev;
struct task_struct *sh_memory_task;
unsigned int cpu = 0;
init_completion(&sh_memory->sync_complete);
/* smc or hvc call happens on cpu 0 bound kthread */
sh_memory_task = kthread_create_on_node(svc_normal_to_secure_shm_thread,
(void *)sh_memory,
cpu_to_node(cpu),
"svc_smc_hvc_shm_thread");
if (IS_ERR(sh_memory_task)) {
dev_err(dev, "fail to create stratix10_svc_smc_shm_thread\n");
return -EINVAL;
}
wake_up_process(sh_memory_task);
if (!wait_for_completion_timeout(&sh_memory->sync_complete, 10 * HZ)) {
dev_err(dev,
"timeout to get sh-memory paras from secure world\n");
return -ETIMEDOUT;
}
if (!sh_memory->addr || !sh_memory->size) {
dev_err(dev,
"failed to get shared memory info from secure world\n");
return -ENOMEM;
}
dev_dbg(dev, "SM software provides paddr: 0x%016x, size: 0x%08x\n",
(unsigned int)sh_memory->addr,
(unsigned int)sh_memory->size);
return 0;
}
/**
* svc_create_memory_pool() - create a memory pool from reserved memory block
* @pdev: pointer to service layer device
* @sh_memory: pointer to service shared memory structure
*
* Return: pool allocated from reserved memory block or ERR_PTR() on error.
*/
static struct gen_pool *
svc_create_memory_pool(struct platform_device *pdev,
struct stratix10_svc_sh_memory *sh_memory)
{
struct device *dev = &pdev->dev;
struct gen_pool *genpool;
unsigned long vaddr;
phys_addr_t paddr;
size_t size;
phys_addr_t begin;
phys_addr_t end;
void *va;
size_t page_mask = PAGE_SIZE - 1;
int min_alloc_order = 3;
int ret;
begin = roundup(sh_memory->addr, PAGE_SIZE);
end = rounddown(sh_memory->addr + sh_memory->size, PAGE_SIZE);
paddr = begin;
size = end - begin;
va = devm_memremap(dev, paddr, size, MEMREMAP_WC);
if (IS_ERR(va)) {
dev_err(dev, "fail to remap shared memory\n");
return ERR_PTR(-EINVAL);
}
vaddr = (unsigned long)va;
dev_dbg(dev,
"reserved memory vaddr: %p, paddr: 0x%16x size: 0x%8x\n",
va, (unsigned int)paddr, (unsigned int)size);
if ((vaddr & page_mask) || (paddr & page_mask) ||
(size & page_mask)) {
dev_err(dev, "page is not aligned\n");
return ERR_PTR(-EINVAL);
}
genpool = gen_pool_create(min_alloc_order, -1);
if (!genpool) {
dev_err(dev, "fail to create genpool\n");
return ERR_PTR(-ENOMEM);
}
gen_pool_set_algo(genpool, gen_pool_best_fit, NULL);
ret = gen_pool_add_virt(genpool, vaddr, paddr, size, -1);
if (ret) {
dev_err(dev, "fail to add memory chunk to the pool\n");
gen_pool_destroy(genpool);
return ERR_PTR(ret);
}
return genpool;
}
/**
* svc_smccc_smc() - secure monitor call between normal and secure world
* @a0: argument passed in registers 0
* @a1: argument passed in registers 1
* @a2: argument passed in registers 2
* @a3: argument passed in registers 3
* @a4: argument passed in registers 4
* @a5: argument passed in registers 5
* @a6: argument passed in registers 6
* @a7: argument passed in registers 7
* @res: result values from register 0 to 3
*/
static void svc_smccc_smc(unsigned long a0, unsigned long a1,
unsigned long a2, unsigned long a3,
unsigned long a4, unsigned long a5,
unsigned long a6, unsigned long a7,
struct arm_smccc_res *res)
{
arm_smccc_smc(a0, a1, a2, a3, a4, a5, a6, a7, res);
}
/**
* svc_smccc_hvc() - hypervisor call between normal and secure world
* @a0: argument passed in registers 0
* @a1: argument passed in registers 1
* @a2: argument passed in registers 2
* @a3: argument passed in registers 3
* @a4: argument passed in registers 4
* @a5: argument passed in registers 5
* @a6: argument passed in registers 6
* @a7: argument passed in registers 7
* @res: result values from register 0 to 3
*/
static void svc_smccc_hvc(unsigned long a0, unsigned long a1,
unsigned long a2, unsigned long a3,
unsigned long a4, unsigned long a5,
unsigned long a6, unsigned long a7,
struct arm_smccc_res *res)
{
arm_smccc_hvc(a0, a1, a2, a3, a4, a5, a6, a7, res);
}
/**
* svc_smccc_1_2_full() - SMC/HVC v1.2 call matching the sync channel method
* @ctrl: service controller (selects SMC vs HVC)
* @args: arguments
* @res: full register-file result (a0-a17)
*/
static void svc_smccc_1_2_full(struct stratix10_svc_controller *ctrl,
const struct arm_smccc_1_2_regs *args,
struct arm_smccc_1_2_regs *res)
{
if (ctrl->invoke_fn == svc_smccc_smc) {
arm_smccc_1_2_smc(args, res);
} else if (ctrl->invoke_fn == svc_smccc_hvc) {
arm_smccc_1_2_hvc(args, res);
} else {
WARN_ON_ONCE(1);
/*
* INTEL_SIP_SMC_STATUS_OK is 0; zero-filled res would be misrouted
* as success. Force an error path and clear fabricated payload.
*/
memset(res, 0, sizeof(*res));
res->a0 = INTEL_SIP_SMC_STATUS_ERROR;
}
}
/**
* get_invoke_func() - invoke SMC or HVC call
* @dev: pointer to device
*
* Return: function pointer to svc_smccc_smc or svc_smccc_hvc.
*/
static svc_invoke_fn *get_invoke_func(struct device *dev)
{
const char *method;
if (of_property_read_string(dev->of_node, "method", &method)) {
dev_warn(dev, "missing \"method\" property\n");
return ERR_PTR(-ENXIO);
}
if (!strcmp(method, "smc"))
return svc_smccc_smc;
if (!strcmp(method, "hvc"))
return svc_smccc_hvc;
dev_warn(dev, "invalid \"method\" property: %s\n", method);
return ERR_PTR(-EINVAL);
}
/**
* stratix10_svc_request_channel_byname() - request a service channel
* @client: pointer to service client
* @name: service client name
*
* This function is used by service client to request a service channel.
*
* Return: a pointer to channel assigned to the client on success,
* or ERR_PTR() on error.
*/
struct stratix10_svc_chan *stratix10_svc_request_channel_byname(
struct stratix10_svc_client *client, const char *name)
{
struct device *dev = client->dev;
struct stratix10_svc_controller *controller;
struct stratix10_svc_chan *chan = NULL;
unsigned long flag;
int i;
/* if probe was called after client's, or error on probe */
if (list_empty(&svc_ctrl))
return ERR_PTR(-EPROBE_DEFER);
controller = list_first_entry(&svc_ctrl,
struct stratix10_svc_controller, node);
for (i = 0; i < SVC_NUM_CHANNEL; i++) {
if (!strcmp(controller->chans[i].name, name)) {
chan = &controller->chans[i];
break;
}
}
/* if there was no channel match */
if (i == SVC_NUM_CHANNEL) {
dev_err(dev, "%s: channel not allocated\n", __func__);
return ERR_PTR(-EINVAL);
}
if (chan->scl || !try_module_get(controller->dev->driver->owner)) {
dev_dbg(dev, "%s: svc not free\n", __func__);
return ERR_PTR(-EBUSY);
}
spin_lock_irqsave(&chan->lock, flag);
chan->scl = client;
chan->ctrl->num_active_client++;
spin_unlock_irqrestore(&chan->lock, flag);
return chan;
}
EXPORT_SYMBOL_GPL(stratix10_svc_request_channel_byname);
/**
* stratix10_svc_add_async_client - Add an asynchronous client to the
* Stratix10 service channel.
* @chan: Pointer to the Stratix10 service channel structure.
* @use_unique_clientid: Boolean flag indicating whether to use a
* unique client ID.
*
* This function adds an asynchronous client to the specified
* Stratix10 service channel. If the `use_unique_clientid` flag is
* set to true, a unique client ID is allocated for the asynchronous
* channel. Otherwise, a common asynchronous channel is used.
*
* Return: 0 on success, or a negative error code on failure:
* -EINVAL if the channel is NULL or the async controller is
* not initialized.
* -EOPNOTSUPP if async operations are not supported.
* -EALREADY if the async channel is already allocated.
* -ENOMEM if memory allocation fails.
* Other negative values if ID allocation fails.
*/
int stratix10_svc_add_async_client(struct stratix10_svc_chan *chan,
bool use_unique_clientid)
{
struct stratix10_svc_controller *ctrl;
struct stratix10_async_ctrl *actrl;
struct stratix10_async_chan *achan;
int ret = 0;
if (!chan)
return -EINVAL;
ctrl = chan->ctrl;
actrl = &ctrl->actrl;
if (!actrl->supported)
return -EOPNOTSUPP;
if (!actrl->initialized) {
dev_err(ctrl->dev, "Async controller not initialized\n");
return -EINVAL;
}
if (chan->async_chan) {
dev_err(ctrl->dev, "async channel already allocated\n");
return -EALREADY;
}
if (use_unique_clientid &&
atomic_read(&actrl->common_achan_refcount) > 0) {
chan->async_chan = actrl->common_async_chan;
atomic_inc(&actrl->common_achan_refcount);
return 0;
}
achan = kzalloc_obj(*achan);
if (!achan)
return -ENOMEM;
ida_init(&achan->job_id_pool);
ret = ida_alloc_max(&actrl->async_id_pool, MAX_SDM_CLIENT_IDS,
GFP_KERNEL);
if (ret < 0) {
dev_err(ctrl->dev,
"Failed to allocate async client id\n");
ida_destroy(&achan->job_id_pool);
kfree(achan);
return ret;
}
achan->async_client_id = ret;
chan->async_chan = achan;
if (use_unique_clientid &&
atomic_read(&actrl->common_achan_refcount) == 0) {
actrl->common_async_chan = achan;
atomic_inc(&actrl->common_achan_refcount);
}
return 0;
}
EXPORT_SYMBOL_GPL(stratix10_svc_add_async_client);
/**
* stratix10_svc_remove_async_client - Remove an asynchronous client
* from the Stratix10 service
* channel.
* @chan: Pointer to the Stratix10 service channel structure.
*
* This function removes an asynchronous client associated with the
* given service channel. It checks if the channel and the
* asynchronous channel are valid, and then proceeds to decrement
* the reference count for the common asynchronous channel if
* applicable. If the reference count reaches zero, it destroys the
* job ID pool and deallocates the asynchronous client ID. For
* non-common asynchronous channels, it directly destroys the job ID
* pool, deallocates the asynchronous client ID, and frees the
* memory allocated for the asynchronous channel.
*
* Return: 0 on success, -EINVAL if the channel or asynchronous
* channel is invalid.
*/
int stratix10_svc_remove_async_client(struct stratix10_svc_chan *chan)
{
struct stratix10_svc_controller *ctrl;
struct stratix10_async_ctrl *actrl;
struct stratix10_async_chan *achan;
if (!chan)
return -EINVAL;
ctrl = chan->ctrl;
actrl = &ctrl->actrl;
achan = chan->async_chan;
if (!achan) {
dev_err(ctrl->dev, "async channel not allocated\n");
return -EINVAL;
}
if (achan == actrl->common_async_chan) {
atomic_dec(&actrl->common_achan_refcount);
if (atomic_read(&actrl->common_achan_refcount) == 0) {
ida_destroy(&achan->job_id_pool);
ida_free(&actrl->async_id_pool,
achan->async_client_id);
kfree(achan);
actrl->common_async_chan = NULL;
}
} else {
ida_destroy(&achan->job_id_pool);
ida_free(&actrl->async_id_pool, achan->async_client_id);
kfree(achan);
}
chan->async_chan = NULL;
return 0;
}
EXPORT_SYMBOL_GPL(stratix10_svc_remove_async_client);
/**
* stratix10_svc_async_send - Send an asynchronous message to the
* Stratix10 service
* @chan: Pointer to the service channel structure
* @msg: Pointer to the message to be sent
* @handler: Pointer to the handler for the asynchronous message
* used by caller for later reference.
* @cb: Callback function to be called upon completion
* @cb_arg: Argument to be passed to the callback function
*
* This function sends an asynchronous message to the SDM mailbox in
* EL3 secure firmware. It performs various checks and setups,
* including allocating a job ID, setting up the transaction ID and
* packaging it to El3 firmware. The function handles different
* commands by setting up the appropriate arguments for the SMC call.
* If the SMC call is successful, the handler is set up and the
* function returns 0. If the SMC call fails, appropriate error
* handling is performed along with cleanup of resources.
*
* Return: 0 on success, -EINVAL for invalid argument, -ENOMEM if
* memory is not available, -EAGAIN if EL3 firmware is busy, -EBADF
* if the message is rejected by EL3 firmware and -EIO on other
* errors from EL3 firmware.
*/
int stratix10_svc_async_send(struct stratix10_svc_chan *chan, void *msg,
void **handler, async_callback_t cb, void *cb_arg)
{
struct arm_smccc_1_2_regs args = { 0 }, res = { 0 };
struct stratix10_svc_async_handler *handle = NULL;
struct stratix10_svc_client_msg *p_msg =
(struct stratix10_svc_client_msg *)msg;
struct stratix10_svc_controller *ctrl;
struct stratix10_async_ctrl *actrl;
struct stratix10_async_chan *achan;
int ret = 0;
if (!chan || !msg || !handler)
return -EINVAL;
achan = chan->async_chan;
ctrl = chan->ctrl;
actrl = &ctrl->actrl;
if (!actrl->initialized) {
dev_err(ctrl->dev, "Async controller not initialized\n");
return -EINVAL;
}
if (!achan) {
dev_err(ctrl->dev, "Async channel not allocated\n");
return -EINVAL;
}
handle = kzalloc(sizeof(*handle), GFP_KERNEL);
if (!handle)
return -ENOMEM;
ret = ida_alloc_max(&achan->job_id_pool, MAX_SDM_JOB_IDS,
GFP_KERNEL);
if (ret < 0) {
dev_err(ctrl->dev, "Failed to allocate job id\n");
kfree(handle);
return -ENOMEM;
}
handle->transaction_id =
STRATIX10_SET_TRANSACTIONID(achan->async_client_id, ret);
handle->cb = cb;
handle->msg = p_msg;
handle->cb_arg = cb_arg;
handle->achan = achan;
/*set the transaction jobid in args.a1*/
args.a1 =
STRATIX10_SIP_SMC_SET_TRANSACTIONID_X1(handle->transaction_id);
switch (p_msg->command) {
case COMMAND_RSU_GET_SPT_TABLE:
args.a0 = INTEL_SIP_SMC_ASYNC_RSU_GET_SPT;
break;
case COMMAND_RSU_STATUS:
args.a0 = INTEL_SIP_SMC_ASYNC_RSU_GET_ERROR_STATUS;
break;
case COMMAND_RSU_NOTIFY:
args.a0 = INTEL_SIP_SMC_ASYNC_RSU_NOTIFY;
args.a2 = p_msg->arg[0];
break;
case COMMAND_HWMON_READTEMP:
args.a0 = INTEL_SIP_SMC_ASYNC_HWMON_READTEMP;
args.a2 = p_msg->arg[0];
break;
case COMMAND_HWMON_READVOLT:
args.a0 = INTEL_SIP_SMC_ASYNC_HWMON_READVOLT;
args.a2 = p_msg->arg[0];
break;
default:
dev_err(ctrl->dev, "Invalid command ,%d\n", p_msg->command);
ret = -EINVAL;
goto deallocate_id;
}
/**
* There is a chance that during the execution of async_send()
* in one core, an interrupt might be received in another core;
* to mitigate this we are adding the handle to the DB and then
* send the smc call. If the smc call is rejected or busy then
* we will deallocate the handle for the client to retry again.
*/
scoped_guard(spinlock_bh, &actrl->trx_list_lock) {
hash_add(actrl->trx_list, &handle->next,
handle->transaction_id);
}
actrl->invoke_fn(actrl, &args, &res);
switch (res.a0) {
case INTEL_SIP_SMC_STATUS_OK:
dev_dbg(ctrl->dev,
"Async message sent with transaction_id 0x%02x\n",
handle->transaction_id);
*handler = handle;
return 0;
case INTEL_SIP_SMC_STATUS_BUSY:
dev_warn(ctrl->dev, "Mailbox is busy, try after some time\n");
ret = -EAGAIN;
break;
case INTEL_SIP_SMC_STATUS_REJECTED:
dev_err(ctrl->dev, "Async message rejected\n");
ret = -EBADF;
break;
default:
dev_err(ctrl->dev,
"Failed to send async message ,got status as %ld\n",
res.a0);
ret = -EIO;
}
scoped_guard(spinlock_bh, &actrl->trx_list_lock) {
hash_del(&handle->next);
}
deallocate_id:
ida_free(&achan->job_id_pool,
STRATIX10_GET_JOBID(handle->transaction_id));
kfree(handle);
return ret;
}
EXPORT_SYMBOL_GPL(stratix10_svc_async_send);
/**
* stratix10_svc_async_prepare_response - Prepare the response data for
* an asynchronous transaction.
* @chan: Pointer to the service channel structure.
* @handle: Pointer to the asynchronous handler structure.
* @data: Pointer to the callback data structure.
*
* This function prepares the response data for an asynchronous transaction. It
* extracts the response data from the SMC response structure and stores it in
* the callback data structure. The function also logs the completion of the
* asynchronous transaction.
*
* Return: 0 on success, -ENOENT if the command is invalid
*/
static int stratix10_svc_async_prepare_response(struct stratix10_svc_chan *chan,
struct stratix10_svc_async_handler *handle,
struct stratix10_svc_cb_data *data)
{
struct stratix10_svc_client_msg *p_msg =
(struct stratix10_svc_client_msg *)handle->msg;
struct stratix10_svc_controller *ctrl = chan->ctrl;
data->status = STRATIX10_GET_SDM_STATUS_CODE(handle->res.a1);
switch (p_msg->command) {
case COMMAND_RSU_NOTIFY:
break;
case COMMAND_RSU_GET_SPT_TABLE:
data->kaddr1 = (void *)&handle->res.a2;
data->kaddr2 = (void *)&handle->res.a3;
break;
case COMMAND_RSU_STATUS:
/* COMMAND_RSU_STATUS has more elements than the cb_data
* can acomodate, so passing the response structure to the
* response function to be handled before done command is
* executed by the client.
*/
data->kaddr1 = (void *)&handle->res;
break;
case COMMAND_HWMON_READTEMP:
case COMMAND_HWMON_READVOLT:
data->kaddr1 = (void *)&handle->res.a2;
break;
default:
dev_alert(ctrl->dev, "Invalid command\n ,%d", p_msg->command);
return -ENOENT;
}
dev_dbg(ctrl->dev, "Async message completed transaction_id 0x%02x\n",
handle->transaction_id);
return 0;
}
/**
* stratix10_svc_async_poll - Polls the status of an asynchronous
* transaction.
* @chan: Pointer to the service channel structure.
* @tx_handle: Handle to the transaction being polled.
* @data: Pointer to the callback data structure.
*
* This function polls the status of an asynchronous transaction
* identified by the given transaction handle. It ensures that the
* necessary structures are initialized and valid before proceeding
* with the poll operation. The function sets up the necessary
* arguments for the SMC call, invokes the call, and prepares the
* response data if the call is successful. If the call fails, the
* function returns the error mapped to the SVC status error.
*
* Return: 0 on success, -EINVAL if any input parameter is invalid,
* -EAGAIN if the transaction is still in progress,
* -EPERM if the command is invalid, or other negative
* error codes on failure.
*/
int stratix10_svc_async_poll(struct stratix10_svc_chan *chan,
void *tx_handle,
struct stratix10_svc_cb_data *data)
{
struct stratix10_svc_async_handler *handle;
struct arm_smccc_1_2_regs args = { 0 };
struct stratix10_svc_controller *ctrl;
struct stratix10_async_ctrl *actrl;
struct stratix10_async_chan *achan;
int ret;
if (!chan || !tx_handle || !data)
return -EINVAL;
ctrl = chan->ctrl;
actrl = &ctrl->actrl;
achan = chan->async_chan;
if (!achan) {
dev_err(ctrl->dev, "Async channel not allocated\n");
return -EINVAL;
}
handle = (struct stratix10_svc_async_handler *)tx_handle;
scoped_guard(spinlock_bh, &actrl->trx_list_lock) {
if (!hash_hashed(&handle->next)) {
dev_err(ctrl->dev, "Invalid transaction handler");
return -EINVAL;
}
}
args.a0 = INTEL_SIP_SMC_ASYNC_POLL;
args.a1 =
STRATIX10_SIP_SMC_SET_TRANSACTIONID_X1(handle->transaction_id);
actrl->invoke_fn(actrl, &args, &handle->res);
/*clear data for response*/
memset(data, 0, sizeof(*data));
if (handle->res.a0 == INTEL_SIP_SMC_STATUS_OK) {
ret = stratix10_svc_async_prepare_response(chan, handle, data);
if (ret) {
dev_err(ctrl->dev, "Error in preparation of response,%d\n", ret);
WARN_ON_ONCE(1);
}
return 0;
} else if (handle->res.a0 == INTEL_SIP_SMC_STATUS_BUSY ||
handle->res.a0 == INTEL_SIP_SMC_STATUS_NO_RESPONSE) {
dev_dbg(ctrl->dev, "async message is not ready yet\n");
return -EAGAIN;
}
dev_err(ctrl->dev,
"Failed to poll async message ,got status as %ld\n",
handle->res.a0);
return -EINVAL;
}
EXPORT_SYMBOL_GPL(stratix10_svc_async_poll);
/**
* stratix10_svc_async_done - Completes an asynchronous transaction.
* @chan: Pointer to the service channel structure.
* @tx_handle: Handle to the transaction being completed.
*
* This function completes an asynchronous transaction identified by
* the given transaction handle. It ensures that the necessary
* structures are initialized and valid before proceeding with the
* completion operation. The function deallocates the transaction ID,
* frees the memory allocated for the handler, and removes the handler
* from the transaction list.
*
* Return: 0 on success, -EINVAL if any input parameter is invalid,
* or other negative error codes on failure.
*/
int stratix10_svc_async_done(struct stratix10_svc_chan *chan, void *tx_handle)
{
struct stratix10_svc_async_handler *handle;
struct stratix10_svc_controller *ctrl;
struct stratix10_async_chan *achan;
struct stratix10_async_ctrl *actrl;
if (!chan || !tx_handle)
return -EINVAL;
ctrl = chan->ctrl;
achan = chan->async_chan;
actrl = &ctrl->actrl;
if (!achan) {
dev_err(ctrl->dev, "async channel not allocated\n");
return -EINVAL;
}
handle = (struct stratix10_svc_async_handler *)tx_handle;
scoped_guard(spinlock_bh, &actrl->trx_list_lock) {
if (!hash_hashed(&handle->next)) {
dev_err(ctrl->dev, "Invalid transaction handle");
return -EINVAL;
}
hash_del(&handle->next);
}
ida_free(&achan->job_id_pool,
STRATIX10_GET_JOBID(handle->transaction_id));
kfree(handle);
return 0;
}
EXPORT_SYMBOL_GPL(stratix10_svc_async_done);
static inline void stratix10_smc_1_2(struct stratix10_async_ctrl *actrl,
const struct arm_smccc_1_2_regs *args,
struct arm_smccc_1_2_regs *res)
{
arm_smccc_1_2_smc(args, res);
}
/**
* stratix10_svc_async_init - Initialize the Stratix10 service
* controller for asynchronous operations.
* @controller: Pointer to the Stratix10 service controller structure.
*
* This function initializes the asynchronous service controller by
* setting up the necessary data structures and initializing the
* transaction list.
*
* Return: 0 on success, -EINVAL if the controller is NULL or already
* initialized, -ENOMEM if memory allocation fails,
* -EADDRINUSE if the client ID is already reserved, or other
* negative error codes on failure.
* -EOPNOTSUPP if system doesn't support async operations.
*/
static int stratix10_svc_async_init(struct stratix10_svc_controller *controller)
{
struct stratix10_async_ctrl *actrl;
struct arm_smccc_res res;
struct device *dev;
int ret;
if (!controller)
return -EINVAL;
actrl = &controller->actrl;
if (actrl->initialized)
return -EINVAL;
dev = controller->dev;
controller->invoke_fn(INTEL_SIP_SMC_SVC_VERSION, 0, 0, 0, 0, 0, 0, 0, &res);
if (res.a0 != INTEL_SIP_SMC_STATUS_OK ||
!(res.a1 > ASYNC_ATF_MINIMUM_MAJOR_VERSION ||
(res.a1 == ASYNC_ATF_MINIMUM_MAJOR_VERSION &&
res.a2 >= ASYNC_ATF_MINIMUM_MINOR_VERSION))) {
dev_info(dev,
"Intel Service Layer Driver: ATF version is not compatible for async operation\n");
actrl->supported = false;
return -EOPNOTSUPP;
}
actrl->supported = true;
actrl->invoke_fn = stratix10_smc_1_2;
ida_init(&actrl->async_id_pool);
/**
* SIP_SVC_V1_CLIENT_ID is used by V1/stratix10_svc_send() clients
* for communicating with SDM synchronously. We need to restrict
* this in V3/stratix10_svc_async_send() usage to distinguish
* between V1 and V3 messages in El3 firmware.
*/
ret = ida_alloc_range(&actrl->async_id_pool, SIP_SVC_V1_CLIENT_ID,
SIP_SVC_V1_CLIENT_ID, GFP_KERNEL);
if (ret < 0) {
dev_err(dev,
"Intel Service Layer Driver: Error on reserving SIP_SVC_V1_CLIENT_ID\n");
ida_destroy(&actrl->async_id_pool);
actrl->invoke_fn = NULL;
return -EADDRINUSE;
}
spin_lock_init(&actrl->trx_list_lock);
hash_init(actrl->trx_list);
atomic_set(&actrl->common_achan_refcount, 0);
actrl->initialized = true;
return 0;
}
/**
* stratix10_svc_async_exit - Clean up and exit the asynchronous
* service controller
* @ctrl: Pointer to the stratix10_svc_controller structure
*
* This function performs the necessary cleanup for the asynchronous
* service controller. It checks if the controller is valid and if it
* has been initialized. It then locks the transaction list and safely
* removes and deallocates each handler in the list. The function also
* removes any asynchronous clients associated with the controller's
* channels and destroys the asynchronous ID pool. Finally, it resets
* the asynchronous ID pool and invoke function pointers to NULL.
*
* Return: 0 on success, -EINVAL if the controller is invalid or not
* initialized.
*/
static int stratix10_svc_async_exit(struct stratix10_svc_controller *ctrl)
{
struct stratix10_svc_async_handler *handler;
struct stratix10_async_ctrl *actrl;
struct hlist_node *tmp;
int i;
if (!ctrl)
return -EINVAL;
actrl = &ctrl->actrl;
if (!actrl->initialized)
return -EINVAL;
actrl->initialized = false;
scoped_guard(spinlock_bh, &actrl->trx_list_lock) {
hash_for_each_safe(actrl->trx_list, i, tmp, handler, next) {
ida_free(&handler->achan->job_id_pool,
STRATIX10_GET_JOBID(handler->transaction_id));
hash_del(&handler->next);
kfree(handler);
}
}
for (i = 0; i < SVC_NUM_CHANNEL; i++) {
if (ctrl->chans[i].async_chan) {
stratix10_svc_remove_async_client(&ctrl->chans[i]);
ctrl->chans[i].async_chan = NULL;
}
}
ida_destroy(&actrl->async_id_pool);
actrl->invoke_fn = NULL;
return 0;
}
/**
* stratix10_svc_free_channel() - free service channel
* @chan: service channel to be freed
*
* This function is used by service client to free a service channel.
*/
void stratix10_svc_free_channel(struct stratix10_svc_chan *chan)
{
unsigned long flag;
spin_lock_irqsave(&chan->lock, flag);
chan->scl = NULL;
chan->ctrl->num_active_client--;
module_put(chan->ctrl->dev->driver->owner);
spin_unlock_irqrestore(&chan->lock, flag);
}
EXPORT_SYMBOL_GPL(stratix10_svc_free_channel);
/**
* stratix10_svc_send() - send a message data to the remote
* @chan: service channel assigned to the client
* @msg: message data to be sent, in the format of
* "struct stratix10_svc_client_msg"
*
* This function is used by service client to add a message to the service
* layer driver's queue for being sent to the secure world.
*
* Return: 0 for success, -ENOMEM or -ENOBUFS on error.
*/
int stratix10_svc_send(struct stratix10_svc_chan *chan, void *msg)
{
struct stratix10_svc_client_msg
*p_msg = (struct stratix10_svc_client_msg *)msg;
struct stratix10_svc_data_mem *p_mem;
struct stratix10_svc_data *p_data;
int ret = 0;
unsigned int cpu = 0;
p_data = kzalloc_obj(*p_data);
if (!p_data)
return -ENOMEM;
/* first caller creates the per-channel kthread */
if (!chan->task) {
struct task_struct *task;
task = kthread_run_on_cpu(svc_normal_to_secure_thread,
(void *)chan,
cpu, "svc_smc_hvc_thread");
if (IS_ERR(task)) {
dev_err(chan->ctrl->dev,
"failed to create svc_smc_hvc_thread\n");
kfree(p_data);
return -EINVAL;
}
spin_lock(&chan->lock);
if (chan->task) {
/* another caller won the race; discard our thread */
spin_unlock(&chan->lock);
kthread_stop(task);
} else {
chan->task = task;
spin_unlock(&chan->lock);
}
}
pr_debug("%s: %s: sent P-va=%p, P-com=%x, P-size=%u\n", __func__,
chan->name, p_msg->payload, p_msg->command,
(unsigned int)p_msg->payload_length);
if (list_empty(&svc_data_mem)) {
if (p_msg->command == COMMAND_RECONFIG) {
struct stratix10_svc_command_config_type *ct =
(struct stratix10_svc_command_config_type *)
p_msg->payload;
p_data->flag = ct->flags;
}
} else {
guard(mutex)(&svc_mem_lock);
list_for_each_entry(p_mem, &svc_data_mem, node)
if (p_mem->vaddr == p_msg->payload) {
p_data->paddr = p_mem->paddr;
p_data->size = p_msg->payload_length;
break;
}
if (p_msg->payload_output) {
list_for_each_entry(p_mem, &svc_data_mem, node)
if (p_mem->vaddr == p_msg->payload_output) {
p_data->paddr_output =
p_mem->paddr;
p_data->size_output =
p_msg->payload_length_output;
break;
}
}
}
p_data->command = p_msg->command;
p_data->arg[0] = p_msg->arg[0];
p_data->arg[1] = p_msg->arg[1];
p_data->arg[2] = p_msg->arg[2];
p_data->size = p_msg->payload_length;
p_data->chan = chan;
pr_debug("%s: %s: put to FIFO pa=0x%016x, cmd=%x, size=%u\n",
__func__,
chan->name,
(unsigned int)p_data->paddr,
p_data->command,
(unsigned int)p_data->size);
ret = kfifo_in_spinlocked(&chan->svc_fifo, p_data,
sizeof(*p_data),
&chan->svc_fifo_lock);
kfree(p_data);
if (!ret)
return -ENOBUFS;
return 0;
}
EXPORT_SYMBOL_GPL(stratix10_svc_send);
/**
* stratix10_svc_done() - complete service request transactions
* @chan: service channel assigned to the client
*
* This function should be called when client has finished its request
* or there is an error in the request process. It allows the service layer
* to stop the running thread to have maximize savings in kernel resources.
*/
void stratix10_svc_done(struct stratix10_svc_chan *chan)
{
/* stop thread when thread is running */
if (chan->task) {
pr_debug("%s: %s: svc_smc_hvc_shm_thread is stopping\n",
__func__, chan->name);
kthread_stop(chan->task);
chan->task = NULL;
}
}
EXPORT_SYMBOL_GPL(stratix10_svc_done);
/**
* stratix10_svc_allocate_memory() - allocate memory
* @chan: service channel assigned to the client
* @size: memory size requested by a specific service client
*
* Service layer allocates the requested number of bytes buffer from the
* memory pool, service client uses this function to get allocated buffers.
*
* Return: address of allocated memory on success, or ERR_PTR() on error.
*/
void *stratix10_svc_allocate_memory(struct stratix10_svc_chan *chan,
size_t size)
{
struct stratix10_svc_data_mem *pmem;
unsigned long va;
phys_addr_t pa;
struct gen_pool *genpool = chan->ctrl->genpool;
size_t s = roundup(size, 1 << genpool->min_alloc_order);
pmem = kzalloc_obj(*pmem);
if (!pmem)
return ERR_PTR(-ENOMEM);
guard(mutex)(&svc_mem_lock);
va = gen_pool_alloc(genpool, s);
if (!va) {
kfree(pmem);
return ERR_PTR(-ENOMEM);
}
memset((void *)va, 0, s);
pa = gen_pool_virt_to_phys(genpool, va);
pmem->vaddr = (void *)va;
pmem->paddr = pa;
pmem->size = s;
list_add_tail(&pmem->node, &svc_data_mem);
pr_debug("%s: %s: va=%p, pa=0x%016x\n", __func__,
chan->name, pmem->vaddr, (unsigned int)pmem->paddr);
return (void *)va;
}
EXPORT_SYMBOL_GPL(stratix10_svc_allocate_memory);
/**
* stratix10_svc_free_memory() - free allocated memory
* @chan: service channel assigned to the client
* @kaddr: memory to be freed
*
* This function is used by service client to free allocated buffers.
*/
void stratix10_svc_free_memory(struct stratix10_svc_chan *chan, void *kaddr)
{
struct stratix10_svc_data_mem *pmem;
guard(mutex)(&svc_mem_lock);
list_for_each_entry(pmem, &svc_data_mem, node)
if (pmem->vaddr == kaddr) {
gen_pool_free(chan->ctrl->genpool,
(unsigned long)kaddr, pmem->size);
pmem->vaddr = NULL;
list_del(&pmem->node);
kfree(pmem);
return;
}
}
EXPORT_SYMBOL_GPL(stratix10_svc_free_memory);
static const struct of_device_id stratix10_svc_drv_match[] = {
{.compatible = "intel,stratix10-svc"},
{.compatible = "intel,agilex-svc"},
{},
};
static const char * const chan_names[SVC_NUM_CHANNEL] = {
SVC_CLIENT_FPGA,
SVC_CLIENT_RSU,
SVC_CLIENT_FCS,
SVC_CLIENT_HWMON
};
static int stratix10_svc_drv_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct stratix10_svc_controller *controller;
struct gen_pool *genpool;
struct stratix10_svc_sh_memory *sh_memory;
struct stratix10_svc *svc = NULL;
svc_invoke_fn *invoke_fn;
size_t fifo_size;
int ret, i = 0;
/* get SMC or HVC function */
invoke_fn = get_invoke_func(dev);
if (IS_ERR(invoke_fn))
return -EINVAL;
sh_memory = devm_kzalloc(dev, sizeof(*sh_memory), GFP_KERNEL);
if (!sh_memory)
return -ENOMEM;
sh_memory->invoke_fn = invoke_fn;
ret = svc_get_sh_memory(pdev, sh_memory);
if (ret)
return ret;
genpool = svc_create_memory_pool(pdev, sh_memory);
if (IS_ERR(genpool))
return PTR_ERR(genpool);
/* allocate service controller and supporting channel */
controller = devm_kzalloc(dev, struct_size(controller, chans, SVC_NUM_CHANNEL),
GFP_KERNEL);
if (!controller) {
ret = -ENOMEM;
goto err_destroy_pool;
}
controller->num_chans = SVC_NUM_CHANNEL;
controller->dev = dev;
controller->num_active_client = 0;
controller->genpool = genpool;
controller->invoke_fn = invoke_fn;
INIT_LIST_HEAD(&controller->node);
init_completion(&controller->complete_status);
ret = stratix10_svc_async_init(controller);
if (ret == -EOPNOTSUPP) {
dev_info(dev, "Intel Service Layer Driver Initialized (sync-only mode)\n");
} else if (ret) {
dev_dbg(dev, "Intel Service Layer Driver: Error on stratix10_svc_async_init %d\n",
ret);
goto err_destroy_pool;
} else {
dev_info(dev, "Intel Service Layer Driver Initialized\n");
}
fifo_size = sizeof(struct stratix10_svc_data) * SVC_NUM_DATA_IN_FIFO;
mutex_init(&controller->sdm_lock);
for (i = 0; i < SVC_NUM_CHANNEL; i++) {
controller->chans[i].scl = NULL;
controller->chans[i].ctrl = controller;
controller->chans[i].name = (char *)chan_names[i];
spin_lock_init(&controller->chans[i].lock);
ret = kfifo_alloc(&controller->chans[i].svc_fifo, fifo_size, GFP_KERNEL);
if (ret) {
dev_err(dev, "failed to allocate FIFO %d\n", i);
goto err_free_fifos;
}
spin_lock_init(&controller->chans[i].svc_fifo_lock);
}
list_add_tail(&controller->node, &svc_ctrl);
platform_set_drvdata(pdev, controller);
/* add svc client device(s) */
svc = devm_kzalloc(dev, sizeof(*svc), GFP_KERNEL);
if (!svc) {
ret = -ENOMEM;
goto err_free_fifos;
}
controller->svc = svc;
svc->stratix10_svc_rsu = platform_device_alloc(STRATIX10_RSU, 0);
if (!svc->stratix10_svc_rsu) {
dev_err(dev, "failed to allocate %s device\n", STRATIX10_RSU);
ret = -ENOMEM;
goto err_free_fifos;
}
ret = platform_device_add(svc->stratix10_svc_rsu);
if (ret)
goto err_put_device;
if (IS_ENABLED(CONFIG_SENSORS_ALTERA_SOCFPGA_HWMON)) {
svc->stratix10_svc_hwmon =
platform_device_alloc(SOCFPGA_HWMON, 0);
if (!svc->stratix10_svc_hwmon) {
dev_err(dev, "failed to allocate %s device\n",
SOCFPGA_HWMON);
} else {
svc->stratix10_svc_hwmon->dev.parent = dev;
ret = platform_device_add(svc->stratix10_svc_hwmon);
if (ret) {
dev_err(dev, "failed to add %s device: %d\n",
SOCFPGA_HWMON, ret);
platform_device_put(svc->stratix10_svc_hwmon);
svc->stratix10_svc_hwmon = NULL;
}
}
}
ret = of_platform_default_populate(dev_of_node(dev), NULL, dev);
if (ret)
goto err_unregister_clients;
pr_info("Intel Service Layer Driver Initialized\n");
return 0;
err_unregister_clients:
if (svc->stratix10_svc_hwmon)
platform_device_unregister(svc->stratix10_svc_hwmon);
if (svc->stratix10_svc_rsu)
platform_device_unregister(svc->stratix10_svc_rsu);
goto err_free_fifos;
err_put_device:
platform_device_put(svc->stratix10_svc_rsu);
err_free_fifos:
/* only remove from list if list_add_tail() was reached */
if (!list_empty(&controller->node))
list_del(&controller->node);
/* free only the FIFOs that were successfully allocated */
while (i--)
kfifo_free(&controller->chans[i].svc_fifo);
stratix10_svc_async_exit(controller);
err_destroy_pool:
gen_pool_destroy(genpool);
return ret;
}
static void stratix10_svc_drv_remove(struct platform_device *pdev)
{
int i;
struct stratix10_svc_controller *ctrl = platform_get_drvdata(pdev);
struct stratix10_svc *svc = ctrl->svc;
platform_device_unregister(svc->stratix10_svc_rsu);
if (svc->stratix10_svc_hwmon)
platform_device_unregister(svc->stratix10_svc_hwmon);
stratix10_svc_async_exit(ctrl);
of_platform_depopulate(ctrl->dev);
for (i = 0; i < SVC_NUM_CHANNEL; i++) {
if (ctrl->chans[i].task) {
kthread_stop(ctrl->chans[i].task);
ctrl->chans[i].task = NULL;
}
kfifo_free(&ctrl->chans[i].svc_fifo);
}
if (ctrl->genpool)
gen_pool_destroy(ctrl->genpool);
list_del(&ctrl->node);
}
static struct platform_driver stratix10_svc_driver = {
.probe = stratix10_svc_drv_probe,
.remove = stratix10_svc_drv_remove,
.driver = {
.name = "stratix10-svc",
.of_match_table = stratix10_svc_drv_match,
},
};
static int __init stratix10_svc_init(void)
{
struct device_node *fw_np;
struct device_node *np;
int ret;
fw_np = of_find_node_by_name(NULL, "firmware");
if (!fw_np)
return -ENODEV;
np = of_find_matching_node(fw_np, stratix10_svc_drv_match);
if (!np)
return -ENODEV;
of_node_put(np);
ret = of_platform_populate(fw_np, stratix10_svc_drv_match, NULL, NULL);
if (ret)
return ret;
return platform_driver_register(&stratix10_svc_driver);
}
static void __exit stratix10_svc_exit(void)
{
return platform_driver_unregister(&stratix10_svc_driver);
}
subsys_initcall(stratix10_svc_init);
module_exit(stratix10_svc_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Intel Stratix10 Service Layer Driver");
MODULE_AUTHOR("Richard Gong <richard.gong@intel.com>");
MODULE_ALIAS("platform:stratix10-svc");
