c593d2fae5
Support reading the SAR Geographic Offset Mapping (SGOM) table from UEFI to allow OEMs to override the values according to geographical regions. Signed-off-by: Ayala Barazani <ayala.barazani@intel.com> Signed-off-by: Luca Coelho <luciano.coelho@intel.com> Link: https://lore.kernel.org/r/iwlwifi.20211204174546.e6dfd8b5dd40.Ibc9a8fe2bfde345f49df5d57ec56663da6a53dc4@changeid Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
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/*
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* Copyright(c) 2021 Intel Corporation
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*/
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#ifndef __iwl_fw_uefi__
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#define __iwl_fw_uefi__
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#define IWL_UEFI_OEM_PNVM_NAME L"UefiCnvWlanOemSignedPnvm"
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#define IWL_UEFI_REDUCED_POWER_NAME L"UefiCnvWlanReducedPower"
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#define IWL_UEFI_SGOM_NAME L"UefiCnvWlanSarGeoOffsetMapping"
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/*
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* TODO: we have these hardcoded values that the caller must pass,
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* because reading from the UEFI is not working. To implement this
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* properly, we have to change iwl_pnvm_get_from_uefi() to call
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* efivar_entry_size() and return the value to the caller instead.
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*/
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#define IWL_HARDCODED_PNVM_SIZE 4096
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#define IWL_HARDCODED_REDUCE_POWER_SIZE 32768
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#define IWL_HARDCODED_SGOM_SIZE 339
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struct pnvm_sku_package {
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u8 rev;
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u32 total_size;
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u8 n_skus;
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u32 reserved[2];
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u8 data[];
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} __packed;
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struct uefi_cnv_wlan_sgom_data {
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u8 revision;
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u8 offset_map[IWL_HARDCODED_SGOM_SIZE - 1];
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} __packed;
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/*
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* This is known to be broken on v4.19 and to work on v5.4. Until we
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* figure out why this is the case and how to make it work, simply
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* disable the feature in old kernels.
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*/
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#ifdef CONFIG_EFI
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void *iwl_uefi_get_pnvm(struct iwl_trans *trans, size_t *len);
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void *iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len);
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#else /* CONFIG_EFI */
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static inline
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void *iwl_uefi_get_pnvm(struct iwl_trans *trans, size_t *len)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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static inline
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void *iwl_uefi_get_reduced_power(struct iwl_trans *trans, size_t *len)
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{
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return ERR_PTR(-EOPNOTSUPP);
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}
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#endif /* CONFIG_EFI */
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#if defined(CONFIG_EFI) && defined(CONFIG_ACPI)
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void iwl_uefi_get_sgom_table(struct iwl_trans *trans, struct iwl_fw_runtime *fwrt);
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#else
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static inline
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void iwl_uefi_get_sgom_table(struct iwl_trans *trans, struct iwl_fw_runtime *fwrt)
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{
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}
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#endif
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#endif /* __iwl_fw_uefi__ */
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