GSoC/kolibrios-nvme-driver
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Code Issues 2 Actions Activity

perf(size): remove useless pow2 implementation

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This commit is contained in:
Abdur-Rahman Mansoor 2024-07-22 14:19:54 -04:00
parent 1ea8733a66
commit e3241e35cc
1 changed files with 10 additions and 31 deletions
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41
drivers/nvme/nvme.asm
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@ -690,12 +690,7 @@ proc nvme_readwrite stdcall, ns:dword, buf:dword, start_sector:qword, numsectors
jz .dptr_fail
DEBUGF DBG_INFO, "PRP1: %x, PRP2: %x\n", [ebx], [ebx + 4]
mov eax, dword [start_sector]
mov ecx, dword [esi + NSINFO.lbads]
xor edx, edx
div ecx
DEBUGF DBG_INFO, "sector start: %u\n", eax
; According to the NVMe specification, the NLB field in the I/O read and write
; commands is a 0-based value (i.e., 0 is equivalant to 1, 1 is equivalant to 2, ...)
@ -1110,11 +1105,13 @@ proc nvme_init stdcall, pci:dword
mov dword [ebx + NSINFO.capacity + 4], eax
;DEBUGF DBG_INFO, "nvme%un%u: Namespace Size: %u + %u logical blocks\n", [esi + pcidev.num], [esi + pcidev.nsid], [edi + IDENTN.nsze], [edi + IDENTN.nsze + 4]
;DEBUGF DBG_INFO, "nvme%un%u: Namespace Capacity: %u + %u logical blocks\n", [esi + pcidev.num], [esi + pcidev.nsid], [edi + IDENTN.ncap], [edi + IDENTN.ncap + 4]
mov eax, dword [edi + IDENTN.lbaf0]
shr eax, 16 ; Get LBADS
and eax, 0xff
stdcall pow2, eax
;DEBUGF DBG_INFO, "nvme%un%u: Namespace LBA Data Size: %u\n", [esi + pcidev.num], [esi + pcidev.nsid], eax
mov ecx, dword [edi + IDENTN.lbaf0]
shr ecx, 16 ; Get LBADS
and ecx, 0xff
dec ecx
mov eax, 2
shl eax, cl
DEBUGF DBG_INFO, "nvme%un%u: Namespace LBA Data Size: %u\n", [esi + pcidev.num], [esi + pcidev.nsid], eax
; KolibriOS only supports a LBADS of 512, so if it's a higher value then we
; have to ignore this namespace
@ -1128,7 +1125,7 @@ proc nvme_init stdcall, pci:dword
div ecx
mov dword [ebx + NSINFO.pg_sectors], eax
invoke KernelFree, edi
if 1
if 0
invoke KernelAlloc, 0x6000
test eax, eax
jz .exit_fail
@ -1138,6 +1135,7 @@ proc nvme_init stdcall, pci:dword
jz .exit_fail
mov edx, NVM_CMD_READ
mov dword [eax], 25
add edi, 0x5
stdcall nvme_readwrite, [esi + pcidev.nsinfo], edi, 0x1000, 0, eax
DEBUGF DBG_INFO, "STRING: %s\n", edi
add edi, 0x2000
@ -1303,25 +1301,6 @@ proc sqytdbl_write stdcall, pci:dword, y:word, cmd:dword
endp
; Calculates 2^x
proc pow2 stdcall, x:byte
push ecx
mov cl, [x]
xor eax, eax
inc eax
test cl, cl
jnz @f
pop ecx
ret
@@:
shl eax, cl
pop ecx
ret
endp
proc nvme_cmd_wait stdcall, pci:dword, y:dword, cid:word
push esi
@ -1488,7 +1467,7 @@ align 4
dd 0 ; no close function
dd 0 ; no closemedia function
dd nvme_query_media
dd 0
dd nvme_read
dd 0 ; no write function (for now)
dd 0 ; no flush function
dd 0 ; use default cache size