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At present, the libqos/fw_cfg.c library does not support the modern DMA interface which is required to write to the fw_cfg files. It only uses the IO interface. Implement read and write methods based on DMA. This will enable developers to add tests that writes to the fw_cfg file(s). The structure of the code is taken from edk2 fw_cfg implementation. It has been tested by writing a qtest that writes to a fw_cfg file. Signed-off-by: Ani Sinha <anisinha@redhat.com> Message-ID: <20250120043847.954881-3-anisinha@redhat.com> Signed-off-by: Fabiano Rosas <farosas@suse.de>
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/*
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* libqos fw_cfg support
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*
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* Copyright IBM, Corp. 2012-2013
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef LIBQOS_FW_CFG_H
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#define LIBQOS_FW_CFG_H
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#include "../libqtest.h"
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#include "libqos.h"
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typedef struct QFWCFG QFWCFG;
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struct QFWCFG
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{
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uint64_t base;
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QTestState *qts;
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void (*select)(QFWCFG *fw_cfg, uint16_t key);
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void (*read)(QFWCFG *fw_cfg, void *data, size_t len);
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};
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void qfw_cfg_select(QFWCFG *fw_cfg, uint16_t key);
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void qfw_cfg_read_data(QFWCFG *fw_cfg, void *data, size_t len);
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void qfw_cfg_get(QFWCFG *fw_cfg, uint16_t key, void *data, size_t len);
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uint16_t qfw_cfg_get_u16(QFWCFG *fw_cfg, uint16_t key);
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uint32_t qfw_cfg_get_u32(QFWCFG *fw_cfg, uint16_t key);
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uint64_t qfw_cfg_get_u64(QFWCFG *fw_cfg, uint16_t key);
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size_t qfw_cfg_get_file(QFWCFG *fw_cfg, const char *filename,
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void *data, size_t buflen);
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size_t qfw_cfg_write_file(QFWCFG *fw_cfg, QOSState *qs, const char *filename,
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void *data, size_t buflen);
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size_t qfw_cfg_read_file(QFWCFG *fw_cfg, QOSState *qs, const char *filename,
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void *data, size_t buflen);
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QFWCFG *mm_fw_cfg_init(QTestState *qts, uint64_t base);
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void mm_fw_cfg_uninit(QFWCFG *fw_cfg);
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QFWCFG *io_fw_cfg_init(QTestState *qts, uint16_t base);
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void io_fw_cfg_uninit(QFWCFG *fw_cfg);
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static inline QFWCFG *pc_fw_cfg_init(QTestState *qts)
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{
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return io_fw_cfg_init(qts, 0x510);
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}
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static inline void pc_fw_cfg_uninit(QFWCFG *fw_cfg)
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{
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io_fw_cfg_uninit(fw_cfg);
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}
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(QFWCFG, mm_fw_cfg_uninit)
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#endif
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