// SPDX-License-Identifier: GPL-2.0-only /* * Aic94xx SAS/SATA driver register access. * * Copyright (C) 2005 Adaptec, Inc. All rights reserved. * Copyright (C) 2005 Luben Tuikov <[email protected]> */ #include <linux/pci.h> #include "aic94xx_reg.h" #include "aic94xx.h" /* Writing to device address space. * Offset comes before value to remind that the operation of * this function is *offs = val. */ static void asd_write_byte(struct asd_ha_struct *asd_ha, unsigned long offs, u8 val) { … } static void asd_write_word(struct asd_ha_struct *asd_ha, unsigned long offs, u16 val) { … } static void asd_write_dword(struct asd_ha_struct *asd_ha, unsigned long offs, u32 val) { … } /* Reading from device address space. */ static u8 asd_read_byte(struct asd_ha_struct *asd_ha, unsigned long offs) { … } static u16 asd_read_word(struct asd_ha_struct *asd_ha, unsigned long offs) { … } static u32 asd_read_dword(struct asd_ha_struct *asd_ha, unsigned long offs) { … } static inline u32 asd_mem_offs_swa(void) { … } static inline u32 asd_mem_offs_swc(void) { … } static inline u32 asd_mem_offs_swb(void) { … } /* We know that the register wanted is in the range * of the sliding window. */ #define ASD_READ_SW(ww, type, ord) … #define ASD_WRITE_SW(ww, type, ord) … ASD_READ_SW(swa, u8, byte); ASD_READ_SW(swa, u16, word); ASD_READ_SW(swa, u32, dword); ASD_READ_SW(swb, u8, byte); ASD_READ_SW(swb, u16, word); ASD_READ_SW(swb, u32, dword); ASD_READ_SW(swc, u8, byte); ASD_READ_SW(swc, u16, word); ASD_READ_SW(swc, u32, dword); ASD_WRITE_SW(swa, u8, byte); ASD_WRITE_SW(swa, u16, word); ASD_WRITE_SW(swa, u32, dword); ASD_WRITE_SW(swb, u8, byte); ASD_WRITE_SW(swb, u16, word); ASD_WRITE_SW(swb, u32, dword); ASD_WRITE_SW(swc, u8, byte); ASD_WRITE_SW(swc, u16, word); ASD_WRITE_SW(swc, u32, dword); /* * A word about sliding windows: * MBAR0 is divided into sliding windows A, C and B, in that order. * SWA starts at offset 0 of MBAR0, up to 0x57, with size 0x58 bytes. * SWC starts at offset 0x58 of MBAR0, up to 0x60, with size 0x8 bytes. * From 0x60 to 0x7F, we have a copy of PCI config space 0x60-0x7F. * SWB starts at offset 0x80 of MBAR0 and extends to the end of MBAR0. * See asd_init_sw() in aic94xx_hwi.c * * We map the most common registers we'd access of the internal 4GB * host adapter memory space. If a register/internal memory location * is wanted which is not mapped, we slide SWB, by paging it, * see asd_move_swb() in aic94xx_reg.c. */ /** * asd_move_swb -- move sliding window B * @asd_ha: pointer to host adapter structure * @reg: register desired to be within range of the new window */ static void asd_move_swb(struct asd_ha_struct *asd_ha, u32 reg) { … } static void __asd_write_reg_byte(struct asd_ha_struct *asd_ha, u32 reg, u8 val) { … } #define ASD_WRITE_REG(type, ord) … ASD_WRITE_REG(u8, byte); ASD_WRITE_REG(u16,word); ASD_WRITE_REG(u32,dword); static u8 __asd_read_reg_byte(struct asd_ha_struct *asd_ha, u32 reg) { … } #define ASD_READ_REG(type, ord) … ASD_READ_REG(u8, byte); ASD_READ_REG(u16,word); ASD_READ_REG(u32,dword); /** * asd_read_reg_string -- read a string of bytes from io space memory * @asd_ha: pointer to host adapter structure * @dst: pointer to a destination buffer where data will be written to * @offs: start offset (register) to read from * @count: number of bytes to read */ void asd_read_reg_string(struct asd_ha_struct *asd_ha, void *dst, u32 offs, int count) { … } /** * asd_write_reg_string -- write a string of bytes to io space memory * @asd_ha: pointer to host adapter structure * @src: pointer to source buffer where data will be read from * @offs: start offset (register) to write to * @count: number of bytes to write */ void asd_write_reg_string(struct asd_ha_struct *asd_ha, void *src, u32 offs, int count) { … }
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