From: Hillf Danton <hdanton@sina.com>
To: Wendy Liang <wendy.liang@xilinx.com>
Cc: arnd@arndb.de, gregkh@linuxfoundation.org,
michal.simek@xilinx.com, dri-devel@lists.freedesktop.org,
linux-kernel@vger.kernel.org, robh+dt@kernel.org,
Nishad Saraf <nishad.saraf@xilinx.com>,
linux-arm-kernel@lists.infradead.org,
linux-media@vger.kernel.org
Subject: Re: [PATCH v2 9/9] misc: xilinx-ai-engine: Add support for servicing error interrupts
Date: Thu, 19 Nov 2020 16:36:45 +0800 [thread overview]
Message-ID: <20201119083645.544-1-hdanton@sina.com> (raw)
In-Reply-To: <1605743289-26575-10-git-send-email-wendy.liang@xilinx.com>
On Wed, 18 Nov 2020 15:48:09 -0800 Wendy Liang wrote:
> +/**
> + * aie_interrupt() - interrupt handler for AIE.
> + * @irq: Interrupt number.
> + * @data: AI engine device structure.
> + * @return: IRQ_HANDLED.
> + *
> + * This thread function disables level 2 interrupt controllers and schedules a
> + * task in workqueue to backtrack the source of error interrupt. Disabled
> + * interrupts are re-enabled after successful completion of bottom half.
> + */
> +irqreturn_t aie_interrupt(int irq, void *data)
> +{
> + struct aie_device *adev = data;
> + struct aie_partition *apart;
> + int ret;
> + bool sched_work = false;
> +
> + ret = mutex_lock_interruptible(&adev->mlock);
> + if (ret) {
> + dev_err(&adev->dev,
> + "Failed to acquire lock. Process was interrupted by fatal signals\n");
> + return IRQ_NONE;
> + }
> +
> + list_for_each_entry(apart, &adev->partitions, node) {
> + struct aie_location loc;
> + u32 ttype, l2_mask, l2_status, l2_bitmap_offset = 0;
> +
> + ret = mutex_lock_interruptible(&apart->mlock);
> + if (ret) {
> + dev_err(&apart->dev,
> + "Failed to acquire lock. Process was interrupted by fatal signals\n");
> + return IRQ_NONE;
Though quite unlikely, you need to release adev->mlock before
going home.
> + }
> +
> + for (loc.col = apart->range.start.col, loc.row = 0;
> + loc.col < apart->range.start.col + apart->range.size.col;
> + loc.col++) {
> + ttype = apart->adev->ops->get_tile_type(&loc);
> + if (ttype != AIE_TILE_TYPE_SHIMNOC)
> + continue;
> +
> + l2_mask = aie_get_l2_mask(apart, &loc);
> + if (l2_mask) {
> + aie_resource_cpy_from_arr32(&apart->l2_mask,
> + l2_bitmap_offset *
> + 32, &l2_mask, 32);
> + aie_disable_l2_ctrl(apart, &loc, l2_mask);
> + }
> + l2_bitmap_offset++;
> +
> + l2_status = aie_get_l2_status(apart, &loc);
> + if (l2_status) {
> + aie_clear_l2_intr(apart, &loc, l2_status);
> + sched_work = true;
> + } else {
> + aie_enable_l2_ctrl(apart, &loc, l2_mask);
> + }
> + }
> + mutex_unlock(&apart->mlock);
> + }
> +
> + /* For ES1 silicon, interrupts are latched in NPI */
> + if (adev->version == VERSAL_ES1_REV_ID) {
> + ret = zynqmp_pm_clear_aie_npi_isr(adev->pm_node_id,
> + AIE_NPI_ERROR_ID);
> + if (ret < 0)
> + dev_err(&adev->dev, "Failed to clear NPI ISR\n");
> + }
> +
> + mutex_unlock(&adev->mlock);
> +
> + if (sched_work)
> + schedule_work(&adev->backtrack);
> +
> + return IRQ_HANDLED;
> +}
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next prev parent reply other threads:[~2020-11-19 8:37 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-18 23:48 [PATCH v2 0/9] Xilinx AI engine kernel driver Wendy Liang
2020-11-18 23:48 ` [PATCH v2 1/9] dt-binding: soc: xilinx: ai-engine: Add AI engine binding Wendy Liang
2020-11-18 23:48 ` [PATCH v2 2/9] misc: Add Xilinx AI engine device driver Wendy Liang
2020-11-19 20:12 ` Dave Airlie
2020-11-19 22:08 ` Wendy Liang
2020-11-24 8:27 ` Wendy Liang
2020-11-18 23:48 ` [PATCH v2 3/9] misc: xilinx-ai-engine: Implement AI engine cleanup sequence Wendy Liang
2020-11-18 23:48 ` [PATCH v2 4/9] misc: xilinx-ai-engine: expose AI engine tile memories to userspace Wendy Liang
2020-11-18 23:48 ` [PATCH v2 5/9] misc: xilinx-ai-engine: add setting shim dma bd operation Wendy Liang
2020-11-18 23:48 ` [PATCH v2 6/9] misc: xilinx-ai-engine: add request and release tiles Wendy Liang
2020-11-18 23:48 ` [PATCH v2 7/9] misc: xilinx-ai-engine: Add support to request device management services Wendy Liang
2020-11-18 23:48 ` [PATCH v2 8/9] firmware: xilinx: Add IOCTL support for AIE ISR Clear Wendy Liang
2020-11-18 23:48 ` [PATCH v2 9/9] misc: xilinx-ai-engine: Add support for servicing error interrupts Wendy Liang
2020-11-19 8:36 ` Hillf Danton [this message]
2020-11-19 21:46 ` Wendy Liang
2020-11-24 3:24 ` Wendy Liang
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