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https://git.missingno.dev/kolibrios-nvme-driver/
synced 2024-12-22 22:08:47 +01:00
wip: add interrupt handling code
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482d186c1a
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@ -110,6 +110,7 @@ proc set_cdw0 stdcall, opcode:byte, cid:word
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endp
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; See pages 161-205 of the NVMe 1.4 specification for reference
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proc nvme_identify stdcall, pci:dword, nsid:dword, dptr:dword, cid:word, cns:byte
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push esi
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@ -448,10 +449,10 @@ proc device_is_compat stdcall, pci:dword
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and eax, CAP_DSTRD
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; Stride is (2 ^ (2 + DSTRD)) bytes
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add eax, 2
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add al, 2
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stdcall pow2, eax
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mov ecx, eax
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mov dword [esi + pcidev.dstrd], eax
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mov byte [esi + pcidev.dstrd], al
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; 1003h + ((2y + 1) * (4 << CAP.DSTRD))
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mov eax, 4
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@ -522,14 +523,6 @@ proc nvme_init stdcall, pci:dword
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cmp eax, NVM_MPS
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jl .exit_fail
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; Check Interrupt Mask Set/Clear
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if 0
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mov eax, dword [edi + NVME_MMIO.INTMS]
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DEBUGF DBG_INFO, "(NVMe) INTMS: %x\n", eax
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mov eax, dword [edi + NVME_MMIO.INTMC]
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DEBUGF DBG_INFO, "(NVMe) INTMC: %x\n", eax
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end if
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; Configure AMS, MPS, CSS
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mov eax, dword [edi + NVME_MMIO.CC]
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and eax, not (CC_AMS or CC_MPS or CC_CSS)
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@ -573,9 +566,11 @@ proc nvme_init stdcall, pci:dword
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; Restart the controller
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stdcall nvme_controller_start, edi
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invoke AllocPage
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invoke KernelAlloc, 0x1000
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test eax, eax
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jz .exit_fail
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mov dword [dptr], eax
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invoke GetPhysAddr
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; pci:dword, nsid:dword, dptr:dword, cid:word, cns:byte
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stdcall nvme_identify, [pci], 0, eax, 0, CNS_IDCS
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@ -643,21 +638,6 @@ proc nvme_wait stdcall, mmio:dword
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endp
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; Writes to completion queue 'y' head doorbell
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proc cqyhdbl_write stdcall, mmio:dword, dstrd:byte, y:byte
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; 1000h + ((2y + 1) * (4 << CAP.DSTRD))
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xor ecx, ecx
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shl ecx, [y]
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inc ecx
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mov eax, 4
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shl eax, [dstrd]
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imul eax, ecx
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add eax, 0x1000
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ret
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endp
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; Writes to submission queue 'y' tail doorbell
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proc sqytdbl_write stdcall, pci:dword, y:byte, sqt:word
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@ -684,6 +664,38 @@ proc sqytdbl_write stdcall, pci:dword, y:byte, sqt:word
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endp
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; Writes to completion queue 'y' head doorbell
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proc cqyhdbl_write stdcall, pci:dword, y:byte, cqh:word
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push esi
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mov esi, [pci]
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; 1000h + ((2y + 1) * (4 << CAP.DSTRD))
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xor eax, eax
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mov cl, [y]
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shl eax, cl
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inc eax
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mov edx, 4
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mov cl, byte [esi + pcidev.dstrd]
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shl edx, cl
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imul edx, eax
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add edx, 0x1000
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movzx eax, [cqh]
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cmp ax, NVM_ACQS
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jl @f
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xor ax, ax
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@@:
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inc ax
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mov esi, dword [esi + pcidev.io_addr]
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;DEBUGF DBG_INFO, "(NVMe) Writing to CQ%uHDBL\n", edx
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mov word [esi + edx], ax ; Write to CQyHDBL
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pop esi
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ret
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endp
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proc write_admin_cmd stdcall, pci:dword
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push esi
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@ -724,19 +736,37 @@ endp
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proc irq_handler
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push esi
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push esi edi
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mov esi, dword [p_nvme_devices]
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mov esi, dword [esi + pcidev.cq_ptr]
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mov ax, word [esi + CQ_ENTRY.sqid]
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DEBUGF DBG_INFO, "SQID: %x\n", ax
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mov ax, word [esi + CQ_ENTRY.sqhd]
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DEBUGF DBG_INFO, "SQHD: %x\n", ax
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mov ax, word [esi + CQ_ENTRY.status]
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DEBUGF DBG_INFO, "Status: %x\n", ax
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mov edi, esi
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mov esi, dword [esi + pcidev.io_addr]
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mov edi, dword [edi + pcidev.cq_ptr]
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mov dword [esi + NVME_MMIO.INTMS], 0x1
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mov eax, dword [edi + CQ_ENTRY.sqid]
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DEBUGF DBG_INFO, "(NVMe) SQID: %u\n", eax
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mov eax, dword [edi + CQ_ENTRY.status]
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DEBUGF DBG_INFO, "(NVMe) Status: %x\n", eax
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test al, al
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jz @f
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; error occurred
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; Interrupt not handled by driver, return 0
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; we have to initiate a controller reset if a admin command encounters
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; a fatal error or if a completion is not received for a deletion
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; of a submission or completion queue (section 10.1 - page 400 of NVMe 1.4 spec)
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stdcall nvme_controller_reset, esi
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stdcall nvme_controller_start, esi
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jmp .exit
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@@:
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stdcall cqyhdbl_write, [p_nvme_devices], 0, 0x0
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mov dword [esi + NVME_MMIO.INTMC], 0x1
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.exit:
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; Interrupt handled by driver, return 1
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xor eax, eax
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pop esi
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inc eax
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pop edi esi
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ret
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endp
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@ -766,6 +796,7 @@ endp
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align 4
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p_nvme_devices dd 0
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pcidevs_len dd 0
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dptr dd ?
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my_service db "NVMe",0 ;max 16 chars include zero
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if __DEBUG__
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include_debug_strings
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