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WIP: feat: add NVMe driver #91

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ramenu wants to merge 5 commits from ramenu/kolibrios:main into main
pull from: ramenu/kolibrios:main
merge into: KolibriOS:main
Conversation 4 Commits 5 Files Changed 4 +2329
ramenu commented 2024-08-21 17:26:32 +02:00
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This adds the current implementation of the NVMe driver from https://git.kolibrios.org/GSoC/kolibrios-nvme-driver.

Currently, the driver seems to work fine on QEMU and Virtualbox, at least from mine and @Burer's tests. I also believe VMWare works, but shutdown on VMWare doesn't work as expected (see GSoC/kolibrios-nvme-driver#5). Unfortunately, we haven't had any tests on real hardware, which is why I have decided to not include it in the AUTORUN.DAT for now, but if you want to add it anyways then that's fine with me.

Lastly, I want to thank all the mentors, developers, and testers and give credit where credit is deserved. Most importantly, @punk_joker for guiding me on how to implement the driver and answering most of my questions, @Burer for testing the driver, and @Doczom, @dunkaist, and @Sweetbread for helping answering and troubleshooting the miscellaneous problems that I had.

This adds the current implementation of the NVMe driver from https://git.kolibrios.org/GSoC/kolibrios-nvme-driver. Currently, the driver seems to work fine on QEMU and Virtualbox, at least from mine and @Burer's tests. I also believe VMWare works, but shutdown on VMWare doesn't work as expected (see https://git.kolibrios.org/GSoC/kolibrios-nvme-driver/issues/5). Unfortunately, we haven't had any tests on real hardware, which is why I have decided to not include it in the AUTORUN.DAT for now, but if you want to add it anyways then that's fine with me. Lastly, I want to thank all the mentors, developers, and testers and give credit where credit is deserved. Most importantly, @punk_joker for guiding me on how to implement the driver and answering most of my questions, @Burer for testing the driver, and @Doczom, @dunkaist, and @Sweetbread for helping answering and troubleshooting the miscellaneous problems that I had.
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ramenu added 1 commit 2024-08-21 17:26:46 +02:00
dunkaist was assigned by Sweetbread 2024-08-21 17:52:00 +02:00
Sweetbread self-assigned this 2024-08-21 17:52:00 +02:00
Doczom was assigned by Sweetbread 2024-08-21 17:52:00 +02:00
Sweetbread reviewed 2024-08-21 18:06:21 +02:00
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You still have TODO comments. Will they be implemented?
Also, I don't think it's worth to add special vim comments

You still have TODO comments. Will they be implemented? Also, I don't think it's worth to add special vim comments
drivers/nvme/command.inc
@ -0,0 +131,4 @@
mov eax, [prp1]
mov dword [esp + SQ_ENTRY.prp1], eax
movzx eax, [fid]
;or eax, 1 shl 31 ; CDW10.SV
Sweetbread commented 2024-08-21 17:59:39 +02:00
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Delete if unnecessary

Delete if unnecessary
drivers/nvme/command.inc
@ -0,0 +203,4 @@
endp
; See page 117-118 of the NVMe 1.4 specification for reference
; INCOMPLETE
Sweetbread commented 2024-08-21 18:01:05 +02:00
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Is the driver still WIP?

Is the driver still WIP?
drivers/nvme/nvme.inc Outdated
@ -0,0 +445,4 @@
sgls dd ?
mnan dd ?
rb 224
subnqn dq ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?
Sweetbread commented 2024-08-21 18:03:30 +02:00
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-> rq 32?

-> `rq 32`?
Doczom reviewed 2024-08-21 18:27:39 +02:00
drivers/nvme/nvme.asm Outdated
@ -0,0 +8,4 @@
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
format PE DLL native
Doczom commented 2024-08-21 18:27:39 +02:00
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format PE DLL native 0.05

adding this value reduces the number of false positives of antiviruses

format PE DLL native 0.05 adding this value reduces the number of false positives of antiviruses
ramenu commented 2024-08-21 19:09:24 +02:00
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You still have TODO comments. Will they be implemented?
Also, I don't think it's worth to add special vim comments

Most of the TODO comments are just future enhancements. The TODO comment you mentioned in particular is an optional command that I was implementing at one point, but stopped when I realized it wasn't important.

Is the driver still WIP?

Currently yes, but all of the features have been implemented. By WIP, I mean it could still be significantly optimized. There are however some parts which I do need to properly check and make sure problems don't occur (see nvme.asm line 267) and the interrupt handler for device conflict. In practice, I don't think the interrupt handler conflict is a problem since the driver checks if any commands have been submitted to the queue anyways, but I'm not certain.

rq 32?

Didn't think about that. Thank you. :)

format PE DLL native 0.05

adding this value reduces the number of false positives of antiviruses

Noted. Thanks.

> You still have TODO comments. Will they be implemented? > Also, I don't think it's worth to add special vim comments Most of the TODO comments are just future enhancements. The TODO comment you mentioned in particular is an optional command that I was implementing at one point, but stopped when I realized it wasn't important. > Is the driver still WIP? Currently yes, but all of the features have been implemented. By WIP, I mean it could still be significantly optimized. There are however some parts which I do need to properly check and make sure problems don't occur (see nvme.asm line 267) and the interrupt handler for device conflict. In practice, I don't think the interrupt handler conflict is a problem since the driver checks if any commands have been submitted to the queue anyways, but I'm not certain. > rq 32? Didn't think about that. Thank you. :) > format PE DLL native 0.05 > > adding this value reduces the number of false positives of antiviruses Noted. Thanks.
ramenu added 1 commit 2024-08-21 19:40:02 +02:00
Sweetbread approved these changes 2024-08-21 19:42:03 +02:00
Doczom approved these changes 2024-08-22 16:50:23 +02:00
Sweetbread requested review from dunkaist 2024-08-22 18:28:43 +02:00
dunkaist was unassigned by Sweetbread 2024-08-22 18:28:49 +02:00
Sweetbread removed their assignment 2024-08-22 18:28:49 +02:00
Doczom was unassigned by Sweetbread 2024-08-22 18:28:49 +02:00
sdongles requested changes 2024-08-22 22:13:38 +02:00
drivers/nvme/macros.inc Outdated
@ -0,0 +26,4 @@
add esp, 12
end if
}
sdongles commented 2024-08-22 21:56:28 +02:00
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I think you do not need this file. Use system debug macro like other drivers

I think you do not need this file. Use system debug macro like other drivers
drivers/nvme/nvme.asm Outdated
@ -0,0 +1138,4 @@
mov word [esi + edx], ax ; Write to CQyHDBL
mov word [edi + NVM_QUEUE_ENTRY.head], ax
; Unlock the mutex now that the command is complete
sdongles commented 2024-08-22 22:12:46 +02:00
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You decided to leave the spinlock mechanism. It is not a problem. But can you add some to-do comments about replacing it and why we need to do it later? Also, what problem did you face trying to replace it with another mechanism?

It will help to understand a problem to someone who will do some work on the driver.

You decided to leave the spinlock mechanism. It is not a problem. But can you add some to-do comments about replacing it and why we need to do it later? Also, what problem did you face trying to replace it with another mechanism? It will help to understand a problem to someone who will do some work on the driver.
drivers/nvme/nvme.asm Outdated
@ -0,0 +1288,4 @@
inc ecx
cmp ecx, ebx
; TODO: Apply solution given by @punk_joker of checking which device
; generated an interrupt.
sdongles commented 2024-08-22 22:02:09 +02:00
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Please add some introduction to the problem it is resolving here.

Please add some introduction to the problem it is resolving here.
ramenu commented 2024-08-23 13:45:48 +02:00
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You decided to leave the spinlock mechanism. It is not a problem. But can you add some to-do comments about replacing it and why we need to do it later? Also, what problem did you face trying to replace it with another mechanism?

It will help to understand a problem to someone who will do some work on the driver.

Sure thing. There wasn't really a problem per say, but I was just mostly afraid of making changes which could potentially cause regressions to the already large number of bugs that the driver had. Now that most bugs have been resolved, I'll start working on this once the VMWare issue has been resolved.

As for your other comments, noted. I'll make those changes.

> You decided to leave the spinlock mechanism. It is not a problem. But can you add some to-do comments about replacing it and why we need to do it later? Also, what problem did you face trying to replace it with another mechanism? > > It will help to understand a problem to someone who will do some work on the driver. Sure thing. There wasn't really a problem per say, but I was just mostly afraid of making changes which could potentially cause regressions to the already large number of bugs that the driver had. Now that most bugs have been resolved, I'll start working on this once the VMWare issue has been resolved. As for your other comments, noted. I'll make those changes.
ramenu commented 2024-08-23 14:22:26 +02:00
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@sdongles, I found a ugly bug prior to line 1290 which will cause the system to freeze if there's more than one NVMe device registered in the system. I'll add a fix for this later today. Thank you for unintentionally helping me spot that. :)

@sdongles, I found a ugly bug prior to line 1290 which will cause the system to freeze if there's more than one NVMe device registered in the system. I'll add a fix for this later today. Thank you for unintentionally helping me spot that. :)
ramenu changed title from feat: add NVMe driver to WIP: feat: add NVMe driver 2024-08-23 14:22:51 +02:00
ramenu added 3 commits 2024-08-23 18:35:44 +02:00
ramenu changed title from WIP: feat: add NVMe driver to feat: add NVMe driver 2024-08-26 00:49:34 +02:00
ramenu changed title from feat: add NVMe driver to WIP: feat: add NVMe driver 2024-08-26 18:32:43 +02:00
ramenu commented 2024-08-26 18:36:46 +02:00
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Nevermind, there's another nasty bug I found which only happens under certain circumstances, see GSoC/kolibrios-nvme-driver#7.

Nevermind, there's another nasty bug I found which only happens under certain circumstances, see https://git.kolibrios.org/GSoC/kolibrios-nvme-driver/issues/7.
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