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a2cdbb1df0
The SiP service in the Arm(R) Ethos(TM)-N NPU driver requires that there is at least one NPU available. If there is no NPU available, the driver is either used incorrectly or the HW config is incorrect. To ensure that the SiP service is not incorrectly used, a setup handler has been added to the service that will validate that there is at least one NPU available. Signed-off-by: Mikael Olsson <mikael.olsson@arm.com> Change-Id: I8139a652f265cfc0db4a37464f39f1fb92868e10
151 lines
3 KiB
C
151 lines
3 KiB
C
/*
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* Copyright (c) 2016-2023, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdint.h>
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#include <common/debug.h>
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#include <common/runtime_svc.h>
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#include <drivers/arm/ethosn.h>
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#include <lib/debugfs.h>
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#include <lib/pmf/pmf.h>
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#include <plat/arm/common/arm_sip_svc.h>
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#include <plat/arm/common/plat_arm.h>
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#include <tools_share/uuid.h>
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/* ARM SiP Service UUID */
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DEFINE_SVC_UUID2(arm_sip_svc_uid,
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0x556d75e2, 0x6033, 0xb54b, 0xb5, 0x75,
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0x62, 0x79, 0xfd, 0x11, 0x37, 0xff);
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static int arm_sip_setup(void)
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{
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if (pmf_setup() != 0) {
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return 1;
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}
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#if USE_DEBUGFS
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if (debugfs_smc_setup() != 0) {
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return 1;
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}
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#endif /* USE_DEBUGFS */
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#if ARM_ETHOSN_NPU_DRIVER
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if (ethosn_smc_setup() != 0) {
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return 1;
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}
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#endif /* ARM_ETHOSN_NPU_DRIVER */
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return 0;
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}
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/*
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* This function handles ARM defined SiP Calls
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*/
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static uintptr_t arm_sip_handler(unsigned int smc_fid,
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u_register_t x1,
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u_register_t x2,
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u_register_t x3,
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u_register_t x4,
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void *cookie,
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void *handle,
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u_register_t flags)
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{
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int call_count = 0;
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#if ENABLE_PMF
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/*
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* Dispatch PMF calls to PMF SMC handler and return its return
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* value
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*/
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if (is_pmf_fid(smc_fid)) {
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return pmf_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
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handle, flags);
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}
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#endif /* ENABLE_PMF */
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#if USE_DEBUGFS
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if (is_debugfs_fid(smc_fid)) {
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return debugfs_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
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handle, flags);
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}
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#endif /* USE_DEBUGFS */
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#if ARM_ETHOSN_NPU_DRIVER
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if (is_ethosn_fid(smc_fid)) {
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return ethosn_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
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handle, flags);
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}
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#endif /* ARM_ETHOSN_NPU_DRIVER */
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switch (smc_fid) {
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case ARM_SIP_SVC_EXE_STATE_SWITCH: {
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/* Execution state can be switched only if EL3 is AArch64 */
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#ifdef __aarch64__
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/* Allow calls from non-secure only */
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if (!is_caller_non_secure(flags))
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SMC_RET1(handle, STATE_SW_E_DENIED);
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/*
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* Pointers used in execution state switch are all 32 bits wide
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*/
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return (uintptr_t) arm_execution_state_switch(smc_fid,
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(uint32_t) x1, (uint32_t) x2, (uint32_t) x3,
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(uint32_t) x4, handle);
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#else
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/* State switch denied */
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SMC_RET1(handle, STATE_SW_E_DENIED);
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#endif /* __aarch64__ */
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}
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case ARM_SIP_SVC_CALL_COUNT:
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/* PMF calls */
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call_count += PMF_NUM_SMC_CALLS;
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#if ARM_ETHOSN_NPU_DRIVER
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/* ETHOSN calls */
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call_count += ETHOSN_NUM_SMC_CALLS;
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#endif /* ARM_ETHOSN_NPU_DRIVER */
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/* State switch call */
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call_count += 1;
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SMC_RET1(handle, call_count);
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case ARM_SIP_SVC_UID:
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/* Return UID to the caller */
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SMC_UUID_RET(handle, arm_sip_svc_uid);
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case ARM_SIP_SVC_VERSION:
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/* Return the version of current implementation */
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SMC_RET2(handle, ARM_SIP_SVC_VERSION_MAJOR, ARM_SIP_SVC_VERSION_MINOR);
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default:
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WARN("Unimplemented ARM SiP Service Call: 0x%x \n", smc_fid);
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SMC_RET1(handle, SMC_UNK);
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}
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}
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/* Define a runtime service descriptor for fast SMC calls */
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DECLARE_RT_SVC(
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arm_sip_svc,
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OEN_SIP_START,
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OEN_SIP_END,
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SMC_TYPE_FAST,
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arm_sip_setup,
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arm_sip_handler
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);
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