From 9ea50cc7796edac4c176eab6ca32f93cf35d3768 Mon Sep 17 00:00:00 2001 From: "Rustem Gimadutdinov (rgimad)" Date: Fri, 16 Jul 2021 16:39:49 +0000 Subject: [PATCH] kolibri-ahci: - add ahci_send_cmd - add ahci_flush_cmd - add ahci_port_rebase - other small changes git-svn-id: svn://kolibrios.org@9068 a494cfbc-eb01-0410-851d-a64ba20cac60 --- kernel/branches/kolibri-ahci/blkdev/ahci.inc | 186 ++++++++++++++++++- kernel/branches/kolibri-ahci/kernel.asm | 2 +- 2 files changed, 179 insertions(+), 9 deletions(-) diff --git a/kernel/branches/kolibri-ahci/blkdev/ahci.inc b/kernel/branches/kolibri-ahci/blkdev/ahci.inc index e475b6ad4e..155ddd362b 100644 --- a/kernel/branches/kolibri-ahci/blkdev/ahci.inc +++ b/kernel/branches/kolibri-ahci/blkdev/ahci.inc @@ -90,6 +90,29 @@ struct HBA_PORT vendor rd 4 ; 0x70 - 0x7F, vendor specific ends +; Command header structure +struct HBA_CMD_HDR + _flags1 db ? ; 0bPWACCCCC, P - Prefetchable, W - Write (1: H2D, 0: D2H) + ; A - ATAPI, C - Command FIS length in DWORDS, 2 ~ 16 + + _flags2 db ? ; 0bPPPPRCB(Re), P - Port multiplier port, R - Reserved, + ; C - Clear busy upon R_OK, B - BIST, Re - Reset + + prdtl dw ? ; Physical region descriptor table length in entries + prdbc dd ? ; Physical region descriptor byte count transferred + ctba dd ? ; Command table descriptor base address + ctbau dd ? ; Command table descriptor base address upper 32 bits + rsv1 rd 4 ; Reserved +ends + +; Contains virtual mappings for port phys memory regions +struct PORT_DATA + clb dd ? ; Command list base + fb dd ? ; FIS base + ctba_arr rd 32 ; ctba_arr[0] = clb[0].ctba, ... and so on. + port dd ? ; address of correspoding HBA_PORT structure +ends + ; Register FIS – Host to Device struct FIS_REG_H2D fis_type db ? ; FIS_TYPE_REG_H2D @@ -215,12 +238,13 @@ ends uglobal align 4 ahci_controller AHCI_DATA + port_data_arr rb (sizeof.PORT_DATA*AHCI_MAX_PORTS) endg ; ----------------------------------------------------------------------- ; detect ahci controller and initialize align 4 -init_ahci: +ahci_init: mov ecx, ahci_controller mov esi, pcidev_list .find_ahci_ctr: @@ -365,9 +389,14 @@ init_ahci: mov ecx, [edi + HBA_PORT.sata_status] and ecx, AHCI_HBA_PxSSTS_DET cmp ecx, AHCI_HBA_PxSSTS_DET_PRESENT - jne .continue_detect_drives + jne .continue_detect_drives - DEBUGF 1, "K: AHCI: found drive at port %d, signature = %x\n", ebx, [edi + HBA_PORT.signature] + DEBUGF 1, "K: AHCI: found drive at port %d, signature = %x\n", ebx, [edi + HBA_PORT.signature] + + mov ecx, ebx + shl ecx, BSF sizeof.PORT_DATA + add ecx, port_data_arr + stdcall ahci_port_rebase, edi, ebx, ecx .continue_detect_drives: inc ebx @@ -381,11 +410,9 @@ init_ahci: ret ; ------------------------------------------------- -; TODO: implement function port_rebase - ; Start command engine ; in: eax - address of HBA_PORT structure -start_cmd: +ahci_start_cmd: .wait_cr: ; Wait until CR (bit15) is cleared bt [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_CR jc .wait_cr @@ -393,12 +420,12 @@ start_cmd: ; Set FRE (bit4) and ST (bit0) bts [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_FRE bts [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_ST - + ; maybe here call ahci flush cmd ? TODO (see seakernel) ret ; Stop command engine ; in: eax - address of HBA_PORT structure -stop_cmd: +ahci_stop_cmd: btr [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_ST ; Clear ST (bit0) btr [eax + HBA_PORT.command], bit_AHCI_HBA_PxCMD_FRE ; Clear FRE (bit4) .wait_fr_cr: ; Wait until FR (bit14), CR (bit15) are cleared @@ -409,6 +436,149 @@ stop_cmd: ret +; The commands may not take effect until the command +; register is read again by software, because reasons. +; in: eax - address of HBA_PORT structure +; out: eax - command register value +ahci_flush_cmd: + mov eax, [eax + HBA_PORT.command] + ret + +; Send command to port +; in: eax - address of HBA_PORT structure +; ebx - index of command slot +ahci_send_cmd: + push ecx + mov [eax + HBA_PORT.interrupt_status], 0xFFFFFFFF + + mov cl, bl + mov [eax + HBA_PORT.command_issue], 1 + shl [eax + HBA_PORT.command_issue], cl + + call ahci_flush_cmd + pop ecx + ret + +; --------------------------------------------------------------------------- +; TODO: check correctness +; in: port - address of HBA_PORT structure +; portno - port index (0..31) +; pdata - address of PORT_DATA structure +proc ahci_port_rebase stdcall, port: dword, portno: dword, pdata: dword + locals + phys_page1 dd ? + virt_page1 dd ? + phys_page23 dd ? + virt_page23 dd ? + tmp dd ? + endl + + pushad + + DEBUGF 1, "Rebasing port %u\n", [portno] + + mov eax, [port] + call ahci_stop_cmd + + ; Command list entry size = 32 + ; Command list entry maxim count = 32 + ; Command list maxim size = 32*32 = 1K per port + call alloc_page + mov [phys_page1], eax + + stdcall map_io_mem, eax, 4096, PG_NOCACHE + PG_SWR ; map to virt memory so we can work with it + mov [virt_page1], eax + + mov esi, [port] + mov ebx, [phys_page1] + mov [esi + HBA_PORT.command_list_base_l], ebx ; set the command list base + mov [esi + HBA_PORT.command_list_base_h], 0 ; zero upper 32 bits of addr cause we are 32 bit os + + mov edi, [pdata] + mov ebx, [virt_page1] + mov [edi + PORT_DATA.clb], ebx ; set pdata->clb + + mov eax, [port] + mov [edi + PORT_DATA.port], eax ; set pdata->port + + stdcall _memset, ebx, 0, 1024 ; zero out the command list + + ; FIS entry size = 256 bytes per port + mov eax, [phys_page1] + add eax, 1024 + mov [esi + HBA_PORT.fis_base_l], eax + mov [esi + HBA_PORT.fis_base_h], 0 + + mov eax, [virt_page1] + add eax, 1024 + mov [edi + PORT_DATA.fb], eax ; set pdata->fb + stdcall _memset, eax, 0, 256 ; zero out + + stdcall alloc_pages, 2 + mov [phys_page23], eax + stdcall map_io_mem, eax, 2*4096, PG_NOCACHE + PG_SWR + mov [virt_page23], eax + + ; Command table size = 256*32 = 8K per port + mov edx, [edi + PORT_DATA.clb] ; cmdheader array base + xor ecx, ecx + +.for1: + cmp ecx, 32 + jae .for1_end + + mov ebx, ecx + shl ebx, BSF sizeof.HBA_CMD_HDR + add ebx, edx ; ebx = cmdheader[ecx] + + mov [ebx + HBA_CMD_HDR.prdtl], 8 ; 8 prdt entries per command table + + ; 256 bytes per command table, 64+16+48+16*8 + + push edx + + ; cmdheader[ecx].ctba = phys_page23 + ecx*256 + mov [ebx + HBA_CMD_HDR.ctba], ecx + shl [ebx + HBA_CMD_HDR.ctba], BSF 256 ; *= 256 + mov eax, [ebx + HBA_CMD_HDR.ctba] + mov edx, [phys_page23] + add [ebx + HBA_CMD_HDR.ctba], edx + + add eax, [virt_page23] + mov [tmp], eax ; tmp = virt_page23 + ecx*256 + mov eax, ecx + shl eax, BSF 4 ; *= 4 + add eax, PORT_DATA.ctba_arr + add eax, edi ; eax = pdata->ctba_arr[ecx] + mov edx, [tmp] + mov [eax], edx ; pdata->ctba_arr[ecx] = virt_page23 + ecx*256 + + pop edx + + mov [ebx + HBA_CMD_HDR.ctbau], 0 + stdcall _memset, [eax], 0, 256 ; zero out + + inc ecx + jmp .for1 +.for1_end: + + mov eax, [port] + call ahci_start_cmd + + DEBUGF 1, "End rebasing port %u\n", [portno] + popad + ret +endp +proc _memset stdcall, dest:dword, val:byte, cnt:dword ; doesnt clobber any registers + ;DEBUGF DBG_INFO, "memset(%x, %u, %u)\n", [dest], [val], [cnt] + push eax ecx edi + mov edi, dword [dest] + mov al, byte [val] + mov ecx, dword [cnt] + rep stosb + pop edi ecx eax + ret +endp diff --git a/kernel/branches/kolibri-ahci/kernel.asm b/kernel/branches/kolibri-ahci/kernel.asm index aeb269f790..c6bcfbbc57 100644 --- a/kernel/branches/kolibri-ahci/kernel.asm +++ b/kernel/branches/kolibri-ahci/kernel.asm @@ -819,7 +819,7 @@ include 'detect/init_ata.inc' jmp ahci_code_end include 'blkdev/ahci.inc' ahci_code_end: -call init_ahci +call ahci_init ;----------------------------------------------------------------------------- if 0 mov ax, [BOOT.sys_disk]