<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=us-ascii"> <style type="text/css" style="display:none;"></style> </head> <body dir="ltr"> <div id="divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Helvetica,sans-serif;" dir="ltr"> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> </div> <hr style="display:inline-block;width:98%" tabindex="-1"> <div id="divRplyFwdMsg" dir="ltr">From: amd-gfx <amd-gfx-bounces@lists.freedesktop.org> on behalf of Oak Zeng <ozeng@amd.com> Sent: Friday, November 30, 2018 10:39:21 AM To: amd-gfx@lists.freedesktop.org Cc: Yang, Philip; Zeng, Oak; Yin, Tianci (Rico) Subject: [PATCH] drm/amdgpu: Fix num_doorbell calculation issue <div> </div> </div> <div class="BodyFragment"> <div class="PlainText">When paging queue is enabled, it use the second page of doorbell. The AMDGPU_DOORBELL64_MAX_ASSIGNMENT definition assumes all the kernel doorbells are in the first page. So with paging queue enabled, the total kernel doorbell range should be original num_doorbell plus one page (0x400 in dword), not *2. Change-Id: I62023bb91da33ca5532b22b263771b587b796d59 Signed-off-by: Oak Zeng <ozeng@amd.com> --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 8eaa40e..c75badf 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -539,10 +539,13 @@ static int amdgpu_device_doorbell_init(struct amdgpu_device *adev) return -EINVAL; /* For Vega, reserve and map two pages on doorbell BAR since SDMA - * paging queue doorbell use the second page + * paging queue doorbell use the second page. The + * AMDGPU_DOORBELL64_MAX_ASSIGNMENT definition assumes all the + * doorbells are in the first page. So with paging queue enabled, + * the max num_doorbells should + 1 page (0x400 in dword) */ if (adev->asic_type >= CHIP_VEGA10) - adev->doorbell.num_doorbells *= 2; + adev->doorbell.num_doorbells += 0x400; adev->doorbell.ptr = ioremap(adev->doorbell.base, adev->doorbell.num_doorbells * -- 2.7.4 _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org <a href="https://lists.freedesktop.org/mailman/listinfo/amd-gfx">https://lists.freedesktop.org/mailman/listinfo/amd-gfx</a> </div> </div> </body> </html>