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

feat: get reading from single prp entry working

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Abdur-Rahman Mansoor 2024-07-09 15:43:45 -04:00
parent 405dcb5155
commit f3a8ed0f6f
1 changed files with 9 additions and 6 deletions
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15
drivers/nvme/nvme.asm
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@ -724,7 +724,7 @@ nvme_read:
nvme_write:
mov edx, NVM_CMD_WRITE
proc nvme_readwrite stdcall, ns:dword, dst:dword, start_sector:qword, numsectors_ptr:dword
proc nvme_readwrite stdcall, ns:dword, buf:dword, start_sector:qword, numsectors_ptr:dword
push ebx esi edi
sub esp, 16
@ -734,7 +734,7 @@ proc nvme_readwrite stdcall, ns:dword, dst:dword, start_sector:qword, numsectors
mov dword [ebx + 8], edx ; command type (read or write)
mov dword [ebx + 12], eax ; save original numsectors value
mov esi, [ns]
mov edi, [dst]
mov edi, [buf]
mov edx, [numsectors_ptr]
mov edx, [edx]
@ -756,14 +756,16 @@ proc nvme_readwrite stdcall, ns:dword, dst:dword, start_sector:qword, numsectors
; assume command completes successfully for now
; Write PRP1
; investigate: why does this change the value of esi??
push esi ebx edi
stdcall write_prp_buf, esi, dword [ebx], edi, [numsectors_ptr]
DEBUGF DBG_INFO, "Successfully wrote PRP1\n"
pop edi ebx esi
test eax, eax
jz .end
; check if PRP2 is needed at all
mov ecx, dword [esi + NSINFO.pg_sectors]
mov edx, dword [ebx + 8]
mov edx, dword [ebx + 12]
cmp edx, ecx
jbe .end
@ -788,7 +790,7 @@ proc nvme_readwrite stdcall, ns:dword, dst:dword, start_sector:qword, numsectors
mov ecx, dword [esi + NSINFO.lbads]
div ecx
mov ebx, eax
stdcall write_prp_list_buf, dword [ebx + 4], [dst], ebx
stdcall write_prp_list_buf, dword [ebx + 4], [buf], ebx
stdcall free_prp_list, dword [ebx + 4], ebx, FALSE
.end:
@ -1192,9 +1194,10 @@ proc nvme_init stdcall, pci:dword
jz .exit_fail
mov edx, NVM_CMD_READ
mov dword [eax], 0x1
stdcall nvme_readwrite, [esi + pcidev.nsinfo], edi, 1, 0, eax
stdcall nvme_readwrite, [esi + pcidev.nsinfo], edi, 0, 0, eax
test eax, eax
jz .exit_fail
DEBUGF DBG_INFO, "%s\n", edi
DEBUGF DBG_INFO, "nvme%u: Successfully initialized driver\n", [esi + pcidev.num]
xor eax, eax
inc eax