From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C3D89FF8875 for ; Wed, 29 Apr 2026 09:39:09 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EB81710EF24; Wed, 29 Apr 2026 09:39:02 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=collabora.com header.i=@collabora.com header.b="FSVzqITs"; dkim-atps=neutral Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) by gabe.freedesktop.org (Postfix) with ESMTPS id 46F5910EEFE for ; Wed, 29 Apr 2026 09:39:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1777455539; bh=wziwJjIxxAv4lvMAYsfdrTzTInL8uzMnt6s9npP1kEE=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=FSVzqITsq9lYLA/chq8SkZV1UDilKKuN4SpABf48/qCn1DQATva6gWmJ3mmNJ1yFz xDlgl0PrM/CoWqYBxyIxd9ZewtXE8u5jCgf8NF0pA84OZQxx9MF6v8GfxIlO93Rsh0 9+/fSbJbfc39zEdFgMkpyCedcIAIdVKg5OYzMF3fRD41sJsGZh02gdOwRKSxXK6rYz jSyf5MdPm3iCDDJwQ1hXizJnKtpPsrmMIfAlegGscKmhBzViczae4Gt37qHiykOi2c peZAWQPy354Pw/fGxklTvsNdRXEVsn4qRkkB62TUL0F88EYl0KSBeTKK1Ju2H3ae7R BRQt5QzPeNRcQ== Received: from [100.64.0.11] (unknown [100.64.0.11]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bbrezillon) by bali.collaboradmins.com (Postfix) with ESMTPSA id A8A1617E1580; Wed, 29 Apr 2026 11:38:58 +0200 (CEST) From: Boris Brezillon Date: Wed, 29 Apr 2026 11:38:35 +0200 Subject: [PATCH 08/10] drm/panthor: Automatically enable interrupts in panthor_fw_wait_acks() MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260429-panthor-signal-from-irq-v1-8-4b92ae4142d2@collabora.com> References: <20260429-panthor-signal-from-irq-v1-0-4b92ae4142d2@collabora.com> In-Reply-To: <20260429-panthor-signal-from-irq-v1-0-4b92ae4142d2@collabora.com> To: Steven Price , Liviu Dudau Cc: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Boris Brezillon X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1777455534; l=4411; i=boris.brezillon@collabora.com; s=20260429; h=from:subject:message-id; bh=wziwJjIxxAv4lvMAYsfdrTzTInL8uzMnt6s9npP1kEE=; b=H0qk+dnvemBGiEl72kN3BDM6vDpXRu99o0FDyP2ypDgiLTaWA+mYHhzDCRKOR+Tg4ynaB1MD8 TlKf7yQ47GuBABceoBkoICMq5U73GWibyR+pKSiFC/RzRZ5KJw99YGC X-Developer-Key: i=boris.brezillon@collabora.com; a=ed25519; pk=eN+ORdOgQY7d5U+0kA8h5bf67XdD8bhKbjD/TCHexSY= X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Rather than assuming an interrupt is always expected for request acks, temporarily enable the relevant interrupts when the polling-wait failed. This should hopefully reduce the number of interrupts the CPU has to process. Signed-off-by: Boris Brezillon --- drivers/gpu/drm/panthor/panthor_fw.c | 34 +++++++++++++++++++-------------- drivers/gpu/drm/panthor/panthor_sched.c | 5 +++-- 2 files changed, 23 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/panthor/panthor_fw.c b/drivers/gpu/drm/panthor/panthor_fw.c index 8239a6951569..f5e0ceca4130 100644 --- a/drivers/gpu/drm/panthor/panthor_fw.c +++ b/drivers/gpu/drm/panthor/panthor_fw.c @@ -1039,16 +1039,10 @@ static void panthor_fw_init_global_iface(struct panthor_device *ptdev) glb_iface->input->progress_timer = PROGRESS_TIMEOUT_CYCLES >> PROGRESS_TIMEOUT_SCALE_SHIFT; glb_iface->input->idle_timer = panthor_fw_conv_timeout(ptdev, IDLE_HYSTERESIS_US); - /* Enable interrupts we care about. */ - glb_iface->input->ack_irq_mask = GLB_CFG_ALLOC_EN | - GLB_PING | - GLB_CFG_PROGRESS_TIMER | - GLB_CFG_POWEROFF_TIMER | - GLB_IDLE_EN | - GLB_IDLE; - - if (panthor_fw_has_glb_state(ptdev)) - glb_iface->input->ack_irq_mask |= GLB_STATE_MASK; + /* Enable interrupts for asynchronous events that are not + * triggered by request acks. + */ + glb_iface->input->ack_irq_mask = GLB_IDLE; panthor_fw_update_reqs(glb_iface, req, GLB_IDLE_EN | GLB_COUNTER_EN, GLB_IDLE_EN | GLB_COUNTER_EN); @@ -1318,8 +1312,8 @@ void panthor_fw_unplug(struct panthor_device *ptdev) * Return: 0 on success, -ETIMEDOUT otherwise. */ static int panthor_fw_wait_acks(const u32 *req_ptr, const u32 *ack_ptr, - wait_queue_head_t *wq, - u32 req_mask, u32 *acked, + u32 *ack_irq_mask_ptr, spinlock_t *lock, + wait_queue_head_t *wq, u32 req_mask, u32 *acked, u32 timeout_ms) { u32 ack, req = READ_ONCE(*req_ptr) & req_mask; @@ -1334,8 +1328,16 @@ static int panthor_fw_wait_acks(const u32 *req_ptr, const u32 *ack_ptr, if (!ret) return 0; - if (wait_event_timeout(*wq, (READ_ONCE(*ack_ptr) & req_mask) == req, - msecs_to_jiffies(timeout_ms))) + scoped_guard(spinlock_irqsave, lock) + *ack_irq_mask_ptr |= req_mask; + + ret = wait_event_timeout(*wq, (READ_ONCE(*ack_ptr) & req_mask) == req, + msecs_to_jiffies(timeout_ms)); + + scoped_guard(spinlock_irqsave, lock) + *ack_irq_mask_ptr &= ~req_mask; + + if (ret) return 0; /* Check one last time, in case we were not woken up for some reason. */ @@ -1369,6 +1371,8 @@ int panthor_fw_glb_wait_acks(struct panthor_device *ptdev, return panthor_fw_wait_acks(&glb_iface->input->req, &glb_iface->output->ack, + &glb_iface->input->ack_irq_mask, + &glb_iface->lock, &ptdev->fw->req_waitqueue, req_mask, acked, timeout_ms); } @@ -1395,6 +1399,8 @@ int panthor_fw_csg_wait_acks(struct panthor_device *ptdev, u32 csg_slot, ret = panthor_fw_wait_acks(&csg_iface->input->req, &csg_iface->output->ack, + &csg_iface->input->ack_irq_mask, + &csg_iface->lock, &ptdev->fw->req_waitqueue, req_mask, acked, timeout_ms); diff --git a/drivers/gpu/drm/panthor/panthor_sched.c b/drivers/gpu/drm/panthor/panthor_sched.c index 601a9bff1485..2edba335f22d 100644 --- a/drivers/gpu/drm/panthor/panthor_sched.c +++ b/drivers/gpu/drm/panthor/panthor_sched.c @@ -1110,7 +1110,7 @@ cs_slot_prog_locked(struct panthor_device *ptdev, u32 csg_id, u32 cs_id) cs_iface->input->ringbuf_output = queue->iface.output_fw_va; cs_iface->input->config = CS_CONFIG_PRIORITY(queue->priority) | CS_CONFIG_DOORBELL(queue->doorbell_id); - cs_iface->input->ack_irq_mask = ~0; + cs_iface->input->ack_irq_mask = CS_FATAL | CS_FAULT | CS_TILER_OOM; panthor_fw_update_reqs(cs_iface, req, CS_IDLE_SYNC_WAIT | CS_IDLE_EMPTY | @@ -1378,7 +1378,8 @@ csg_slot_prog_locked(struct panthor_device *ptdev, u32 csg_id, u32 priority) csg_iface->input->protm_suspend_buf = 0; } - csg_iface->input->ack_irq_mask = ~0; + csg_iface->input->ack_irq_mask = CSG_SYNC_UPDATE | CSG_IDLE | + CSG_PROGRESS_TIMER_EVENT; panthor_fw_toggle_reqs(csg_iface, doorbell_req, doorbell_ack, queue_mask); return 0; } -- 2.53.0