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Lin" , Singo Chang , Nancy Lin , Shawn Sung , Subject: [PATCH v3 5/9] mailbox: mtk-cmdq: Support GCE loop packets in interrupt handler Date: Fri, 22 Dec 2023 12:52:24 +0800 Message-ID: <20231222045228.27826-6-jason-jh.lin@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20231222045228.27826-1-jason-jh.lin@mediatek.com> References: <20231222045228.27826-1-jason-jh.lin@mediatek.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--6.634800-8.000000 X-TMASE-MatchedRID: yvDAzrttxFXlOkrqlJanurMjW/sniEQKLoYOuiLW+uUnArDy4nBG1Hv9 jBhUgWuo8rh5UHP2/XFYo3G+rvxrNW94Ipa1otxo4pdq9sdj8LXljSRvSGpq3Ddnd59Af7CPaza 5eRS5azTftLFtxOSbQ4Ay6p60ZV62fJ5/bZ6npdg7AFczfjr/7EBFd4FGrBKQyOewPmnLzhtVIo CVHgZEDqFC7/IJnZXOFNQUJ0xmGqI= X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--6.634800-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: F6326F6ACD43B13C78C9E85D2560378FEB293B7531CAB4A1C8754E0662C85E852000:8 X-MTK: N 1. Add a loop flag for CMDQ packet struct. CMDQ helper will use a loop flag to mark CMDQ packet as lopping command and make current command buffer jumps to the beginning when GCE executes to the end of command buffer. 2. Add a looping task handle flow in irq handler. GCE irq occurs when GCE executes to the end of command(EOC) instruction. If the CMDQ packet is a loopping command, GCE irq handler can not delete the CMDQ task and disable the GCE thread. Signed-off-by: Jason-JH.Lin --- drivers/mailbox/mtk-cmdq-mailbox.c | 11 +++++++++++ include/linux/mailbox/mtk-cmdq-mailbox.h | 1 + 2 files changed, 12 insertions(+) diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c index 27ff3a3ccf2f..5390b6488ebc 100644 --- a/drivers/mailbox/mtk-cmdq-mailbox.c +++ b/drivers/mailbox/mtk-cmdq-mailbox.c @@ -267,6 +267,17 @@ static void cmdq_thread_irq_handler(struct cmdq *cmdq, curr_pa = readl(thread->base + CMDQ_THR_CURR_ADDR) << cmdq->pdata->shift; + task = list_first_entry_or_null(&thread->task_busy_list, + struct cmdq_task, list_entry); + if (task && task->pkt->loop) { + struct cmdq_cb_data data; + + data.sta = err; + data.pkt = task->pkt; + mbox_chan_received_data(task->thread->chan, &data); + return; + } + list_for_each_entry_safe(task, tmp, &thread->task_busy_list, list_entry) { task_end_pa = task->pa_base + task->pkt->cmd_buf_size; diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h index a8f0070c7aa9..f78a08e7c6ed 100644 --- a/include/linux/mailbox/mtk-cmdq-mailbox.h +++ b/include/linux/mailbox/mtk-cmdq-mailbox.h @@ -76,6 +76,7 @@ struct cmdq_pkt { size_t cmd_buf_size; /* command occupied size */ size_t buf_size; /* real buffer size */ void *cl; + bool loop; }; u8 cmdq_get_shift_pa(struct mbox_chan *chan);