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Fri, 30 Aug 2019 10:23:48 +0800 Message-ID: <1567131823.24642.4.camel@mhfsdcap03> Subject: Re: [PATCH v14 07/10] soc: mediatek: cmdq: define the instruction struct From: houlong wei To: Bibby Hsieh Date: Fri, 30 Aug 2019 10:23:43 +0800 In-Reply-To: <20190829014817.25482-9-bibby.hsieh@mediatek.com> References: <20190829014817.25482-1-bibby.hsieh@mediatek.com> <20190829014817.25482-9-bibby.hsieh@mediatek.com> X-Mailer: Evolution 3.10.4-0ubuntu2 MIME-Version: 1.0 X-TM-SNTS-SMTP: 12636E4DEB4769029CE24443B391F3E200D9807E82F84E9F8E69B09A8C990E5C2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190829_192355_541087_7CF83763 X-CRM114-Status: GOOD ( 17.50 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "devicetree@vger.kernel.org" , Nicolas Boichat , srv_heupstream , Jassi Brar , "linux-kernel@vger.kernel.org" , houlong.wei@mediatek.com, Dennis-YC Hsieh =?UTF-8?Q?=28=E8=AC=9D=E5=AE=87=E5=93=B2=29?= , CK Hu =?UTF-8?Q?=28=E8=83=A1=E4=BF=8A=E5=85=89=29?= , Rob Herring , "linux-mediatek@lists.infradead.org" , Matthias Brugger , "linux-arm-kernel@lists.infradead.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, 2019-08-29 at 09:48 +0800, Bibby Hsieh wrote: > Define an instruction structure for gce driver to append command. > This structure can make the client's code more readability. > > Signed-off-by: Bibby Hsieh > Reviewed-by: CK Hu > Reviewed-by: Houlong Wei > --- > drivers/soc/mediatek/mtk-cmdq-helper.c | 77 ++++++++++++++++-------- > include/linux/mailbox/mtk-cmdq-mailbox.h | 10 +++ > 2 files changed, 61 insertions(+), 26 deletions(-) > > diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c > index 7aa0517ff2f3..9472526ab076 100644 > --- a/drivers/soc/mediatek/mtk-cmdq-helper.c > +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c > @@ -9,12 +9,24 @@ > #include > #include > > -#define CMDQ_ARG_A_WRITE_MASK 0xffff > #define CMDQ_WRITE_ENABLE_MASK BIT(0) > #define CMDQ_EOC_IRQ_EN BIT(0) > #define CMDQ_EOC_CMD ((u64)((CMDQ_CODE_EOC << CMDQ_OP_CODE_SHIFT)) \ > << 32 | CMDQ_EOC_IRQ_EN) > > +struct cmdq_instruction { > + union { > + u32 value; > + u32 mask; > + }; > + union { > + u16 offset; > + u16 event; > + }; > + u8 subsys; > + u8 op; > +}; > + > static void cmdq_client_timeout(struct timer_list *t) > { > struct cmdq_client *client = from_timer(client, t, timer); > @@ -110,10 +122,10 @@ void cmdq_pkt_destroy(struct cmdq_pkt *pkt) > } > EXPORT_SYMBOL(cmdq_pkt_destroy); > > -static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, enum cmdq_code code, > - u32 arg_a, u32 arg_b) > +static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, > + struct cmdq_instruction inst) Can we use 'struct cmdq_instruction *inst' instead of 'struct cmdq_instruction inst' to reduce stack memory consumption a bit? > { > - u64 *cmd_ptr; > + struct cmdq_instruction *cmd_ptr; > > if (unlikely(pkt->cmd_buf_size + CMDQ_INST_SIZE > pkt->buf_size)) { > /* > @@ -129,8 +141,9 @@ static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, enum cmdq_code code, > __func__, (u32)pkt->buf_size); > return -ENOMEM; > } > + > cmd_ptr = pkt->va_base + pkt->cmd_buf_size; > - (*cmd_ptr) = (u64)((code << CMDQ_OP_CODE_SHIFT) | arg_a) << 32 | arg_b; > + *cmd_ptr = inst; > pkt->cmd_buf_size += CMDQ_INST_SIZE; > > return 0; > @@ -138,24 +151,31 @@ static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, enum cmdq_code code, > > int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value) > { > - u32 arg_a = (offset & CMDQ_ARG_A_WRITE_MASK) | > - (subsys << CMDQ_SUBSYS_SHIFT); > + struct cmdq_instruction inst; > + > + inst.op = CMDQ_CODE_WRITE; > + inst.value = value; > + inst.offset = offset; > + inst.subsys = subsys; > > - return cmdq_pkt_append_command(pkt, CMDQ_CODE_WRITE, arg_a, value); > + return cmdq_pkt_append_command(pkt, inst); > } > EXPORT_SYMBOL(cmdq_pkt_write); > > int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys, > u16 offset, u32 value, u32 mask) > { > - u32 offset_mask = offset; > + struct cmdq_instruction inst = { {0} }; > + u16 offset_mask = offset; > int err = 0; > > if (mask != 0xffffffff) { > - err = cmdq_pkt_append_command(pkt, CMDQ_CODE_MASK, 0, ~mask); > + inst.op = CMDQ_CODE_MASK; > + inst.mask = ~mask; > + err = cmdq_pkt_append_command(pkt, inst); > offset_mask |= CMDQ_WRITE_ENABLE_MASK; > } > - err |= cmdq_pkt_write(pkt, value, subsys, offset_mask); > + err |= cmdq_pkt_write(pkt, subsys, offset_mask, value); > > return err; > } > @@ -163,43 +183,48 @@ EXPORT_SYMBOL(cmdq_pkt_write_mask); > > int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event) > { > - u32 arg_b; > + struct cmdq_instruction inst = { {0} }; > > if (event >= CMDQ_MAX_EVENT) > return -EINVAL; > > - /* > - * WFE arg_b > - * bit 0-11: wait value > - * bit 15: 1 - wait, 0 - no wait > - * bit 16-27: update value > - * bit 31: 1 - update, 0 - no update > - */ > - arg_b = CMDQ_WFE_UPDATE | CMDQ_WFE_WAIT | CMDQ_WFE_WAIT_VALUE; > + inst.op = CMDQ_CODE_WFE; > + inst.value = CMDQ_WFE_OPTION; > + inst.event = event; > > - return cmdq_pkt_append_command(pkt, CMDQ_CODE_WFE, event, arg_b); > + return cmdq_pkt_append_command(pkt, inst); > } > EXPORT_SYMBOL(cmdq_pkt_wfe); > > int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event) > { > + struct cmdq_instruction inst = { {0} }; > + > if (event >= CMDQ_MAX_EVENT) > return -EINVAL; > > - return cmdq_pkt_append_command(pkt, CMDQ_CODE_WFE, event, > - CMDQ_WFE_UPDATE); > + inst.op = CMDQ_CODE_WFE; > + inst.value = CMDQ_WFE_UPDATE; > + inst.event = event; > + > + return cmdq_pkt_append_command(pkt, inst); > } > EXPORT_SYMBOL(cmdq_pkt_clear_event); > > static int cmdq_pkt_finalize(struct cmdq_pkt *pkt) > { > - int err; > + struct cmdq_instruction inst = { {0} }; > + int err = 0; > > /* insert EOC and generate IRQ for each command iteration */ > - err = cmdq_pkt_append_command(pkt, CMDQ_CODE_EOC, 0, CMDQ_EOC_IRQ_EN); > + inst.op = CMDQ_CODE_EOC; > + inst.value = CMDQ_EOC_IRQ_EN; > + err = cmdq_pkt_append_command(pkt, inst); > > /* JUMP to end */ > - err |= cmdq_pkt_append_command(pkt, CMDQ_CODE_JUMP, 0, CMDQ_JUMP_PASS); > + inst.op = CMDQ_CODE_JUMP; > + inst.value = CMDQ_JUMP_PASS; > + err |= cmdq_pkt_append_command(pkt, inst); > > return err; > } > diff --git a/include/linux/mailbox/mtk-cmdq-mailbox.h b/include/linux/mailbox/mtk-cmdq-mailbox.h > index e6f54ef6698b..678760548791 100644 > --- a/include/linux/mailbox/mtk-cmdq-mailbox.h > +++ b/include/linux/mailbox/mtk-cmdq-mailbox.h > @@ -20,6 +20,16 @@ > #define CMDQ_WFE_WAIT BIT(15) > #define CMDQ_WFE_WAIT_VALUE 0x1 > > +/* > + * WFE arg_b > + * bit 0-11: wait value > + * bit 15: 1 - wait, 0 - no wait > + * bit 16-27: update value > + * bit 31: 1 - update, 0 - no update > + */ > +#define CMDQ_WFE_OPTION (CMDQ_WFE_UPDATE | CMDQ_WFE_WAIT | \ > + CMDQ_WFE_WAIT_VALUE) > + > /** cmdq event maximum */ > #define CMDQ_MAX_EVENT 0x3ff > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel