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[2001:4c4e:24d8:e600:5908:b7d2:79c7:b6b2]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-42cb7f2e454sm40537696f8f.2.2025.11.26.05.29.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Nov 2025 05:29:55 -0800 (PST) From: =?UTF-8?q?Timur=20Krist=C3=B3f?= To: =?UTF-8?q?Christian=20K=C3=B6nig?= , Alex Deucher , amd-gfx@lists.freedesktop.org Cc: =?UTF-8?q?Timur=20Krist=C3=B3f?= Subject: [PATCH 01/10] drm/amdgpu/si_ih: Enable soft IRQ handler ring Date: Wed, 26 Nov 2025 14:29:43 +0100 Message-ID: <20251126132952.150452-2-timur.kristof@gmail.com> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20251126132952.150452-1-timur.kristof@gmail.com> References: <20251126132952.150452-1-timur.kristof@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" We are going to use the soft IRQ handler ring on GMC v6 (SI) to process interrupts from VM faults. Signed-off-by: Timur Kristóf --- drivers/gpu/drm/amd/amdgpu/si_ih.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/si_ih.c b/drivers/gpu/drm/amd/amdgpu/si_ih.c index 1df00f8a2406..66f650f87243 100644 --- a/drivers/gpu/drm/amd/amdgpu/si_ih.c +++ b/drivers/gpu/drm/amd/amdgpu/si_ih.c @@ -96,6 +96,9 @@ static int si_ih_irq_init(struct amdgpu_device *adev) pci_set_master(adev->pdev); si_ih_enable_interrupts(adev); + if (adev->irq.ih_soft.ring_size) + adev->irq.ih_soft.enabled = true; + return 0; } @@ -112,6 +115,9 @@ static u32 si_ih_get_wptr(struct amdgpu_device *adev, wptr = le32_to_cpu(*ih->wptr_cpu); + if (ih == &adev->irq.ih_soft) + goto out; + if (wptr & IH_RB_WPTR__RB_OVERFLOW_MASK) { wptr &= ~IH_RB_WPTR__RB_OVERFLOW_MASK; dev_warn(adev->dev, "IH ring buffer overflow (0x%08X, 0x%08X, 0x%08X)\n", @@ -127,6 +133,8 @@ static u32 si_ih_get_wptr(struct amdgpu_device *adev, tmp &= ~IH_RB_CNTL__WPTR_OVERFLOW_CLEAR_MASK; WREG32(IH_RB_CNTL, tmp); } + +out: return (wptr & ih->ptr_mask); } @@ -175,6 +183,10 @@ static int si_ih_sw_init(struct amdgpu_ip_block *ip_block) if (r) return r; + r = amdgpu_ih_ring_init(adev, &adev->irq.ih_soft, IH_SW_RING_SIZE, true); + if (r) + return r; + return amdgpu_irq_init(adev); } -- 2.51.1