forked from ~ljy/RK356X_SDK_RELEASE
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hc
2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/drivers/dma/imx-sdma.c
....@@ -335,7 +335,7 @@
335335  * @sdma:		pointer to the SDMA engine for this channel
336336  * @channel:		the channel number, matches dmaengine chan_id + 1
337337  * @direction:		transfer type. Needed for setting SDMA script
338
- * @slave_config	Slave configuration
338
+ * @slave_config:	Slave configuration
339339  * @peripheral_type:	Peripheral type. Needed for setting SDMA script
340340  * @event_id0:		aka dma request line
341341  * @event_id1:		for channels that use 2 events
....@@ -354,8 +354,10 @@
354354  * @shp_addr:		value for gReg[6]
355355  * @per_addr:		value for gReg[2]
356356  * @status:		status of dma channel
357
+ * @context_loaded:	ensure context is only loaded once
357358  * @data:		specific sdma interface structure
358359  * @bd_pool:		dma_pool for bd
360
+ * @terminate_worker:	used to call back into terminate work function
359361  */
360362 struct sdma_channel {
361363 	struct virt_dma_chan		vc;
....@@ -418,11 +420,11 @@
418420 	int chnenbl0;
419421 	int num_events;
420422 	struct sdma_script_start_addrs	*script_addrs;
423
+	bool check_ratio;
421424 };
422425 
423426 struct sdma_engine {
424427 	struct device			*dev;
425
-	struct device_dma_parameters	dma_parms;
426428 	struct sdma_channel		channel[MAX_DMA_CHANNELS];
427429 	struct sdma_channel_control	*channel_control;
428430 	void __iomem			*regs;
....@@ -440,6 +442,8 @@
440442 	unsigned int			irq;
441443 	dma_addr_t			bd0_phys;
442444 	struct sdma_buffer_descriptor	*bd0;
445
+	/* clock ratio for AHB:SDMA core. 1:1 is 1, 2:1 is 0*/
446
+	bool				clk_ratio;
443447 };
444448 
445449 static int sdma_config_write(struct dma_chan *chan,
....@@ -554,6 +558,13 @@
554558 	.script_addrs = &sdma_script_imx7d,
555559 };
556560 
561
+static struct sdma_driver_data sdma_imx8mq = {
562
+	.chnenbl0 = SDMA_CHNENBL0_IMX35,
563
+	.num_events = 48,
564
+	.script_addrs = &sdma_script_imx7d,
565
+	.check_ratio = 1,
566
+};
567
+
557568 static const struct platform_device_id sdma_devtypes[] = {
558569 	{
559570 		.name = "imx25-sdma",
....@@ -577,6 +588,9 @@
577588 		.name = "imx7d-sdma",
578589 		.driver_data = (unsigned long)&sdma_imx7d,
579590 	}, {
591
+		.name = "imx8mq-sdma",
592
+		.driver_data = (unsigned long)&sdma_imx8mq,
593
+	}, {
580594 		/* sentinel */
581595 	}
582596 };
....@@ -590,6 +604,7 @@
590604 	{ .compatible = "fsl,imx31-sdma", .data = &sdma_imx31, },
591605 	{ .compatible = "fsl,imx25-sdma", .data = &sdma_imx25, },
592606 	{ .compatible = "fsl,imx7d-sdma", .data = &sdma_imx7d, },
607
+	{ .compatible = "fsl,imx8mq-sdma", .data = &sdma_imx8mq, },
593608 	{ /* sentinel */ }
594609 };
595610 MODULE_DEVICE_TABLE(of, sdma_dt_ids);
....@@ -662,8 +677,11 @@
662677 		dev_err(sdma->dev, "Timeout waiting for CH0 ready\n");
663678 
664679 	/* Set bits of CONFIG register with dynamic context switching */
665
-	if (readl(sdma->regs + SDMA_H_CONFIG) == 0)
666
-		writel_relaxed(SDMA_H_CONFIG_CSM, sdma->regs + SDMA_H_CONFIG);
680
+	reg = readl(sdma->regs + SDMA_H_CONFIG);
681
+	if ((reg & SDMA_H_CONFIG_CSM) == 0) {
682
+		reg |= SDMA_H_CONFIG_CSM;
683
+		writel_relaxed(reg, sdma->regs + SDMA_H_CONFIG);
684
+	}
667685 
668686 	return ret;
669687 }
....@@ -677,9 +695,7 @@
677695 	int ret;
678696 	unsigned long flags;
679697 
680
-	buf_virt = dma_alloc_coherent(NULL,
681
-			size,
682
-			&buf_phys, GFP_KERNEL);
698
+	buf_virt = dma_alloc_coherent(sdma->dev, size, &buf_phys, GFP_KERNEL);
683699 	if (!buf_virt) {
684700 		return -ENOMEM;
685701 	}
....@@ -698,7 +714,7 @@
698714 
699715 	spin_unlock_irqrestore(&sdma->channel_0_lock, flags);
700716 
701
-	dma_free_coherent(NULL, size, buf_virt, buf_phys);
717
+	dma_free_coherent(sdma->dev, size, buf_virt, buf_phys);
702718 
703719 	return ret;
704720 }
....@@ -744,12 +760,8 @@
744760 		return;
745761 	}
746762 	sdmac->desc = desc = to_sdma_desc(&vd->tx);
747
-	/*
748
-	 * Do not delete the node in desc_issued list in cyclic mode, otherwise
749
-	 * the desc allocated will never be freed in vchan_dma_desc_free_list
750
-	 */
751
-	if (!(sdmac->flags & IMX_DMA_SG_LOOP))
752
-		list_del(&vd->node);
763
+
764
+	list_del(&vd->node);
753765 
754766 	sdma->channel_control[channel].base_bd_ptr = desc->bd_phys;
755767 	sdma->channel_control[channel].current_bd_ptr = desc->bd_phys;
....@@ -1050,19 +1062,26 @@
10501062 
10511063 	spin_lock_irqsave(&sdmac->vc.lock, flags);
10521064 	vchan_get_all_descriptors(&sdmac->vc, &head);
1053
-	sdmac->desc = NULL;
10541065 	spin_unlock_irqrestore(&sdmac->vc.lock, flags);
10551066 	vchan_dma_desc_free_list(&sdmac->vc, &head);
10561067 }
10571068 
1058
-static int sdma_disable_channel_async(struct dma_chan *chan)
1069
+static int sdma_terminate_all(struct dma_chan *chan)
10591070 {
10601071 	struct sdma_channel *sdmac = to_sdma_chan(chan);
1072
+	unsigned long flags;
1073
+
1074
+	spin_lock_irqsave(&sdmac->vc.lock, flags);
10611075 
10621076 	sdma_disable_channel(chan);
10631077 
1064
-	if (sdmac->desc)
1078
+	if (sdmac->desc) {
1079
+		vchan_terminate_vdesc(&sdmac->desc->vd);
1080
+		sdmac->desc = NULL;
10651081 		schedule_work(&sdmac->terminate_worker);
1082
+	}
1083
+
1084
+	spin_unlock_irqrestore(&sdmac->vc.lock, flags);
10661085 
10671086 	return 0;
10681087 }
....@@ -1119,7 +1138,6 @@
11191138 static int sdma_config_channel(struct dma_chan *chan)
11201139 {
11211140 	struct sdma_channel *sdmac = to_sdma_chan(chan);
1122
-	int ret;
11231141 
11241142 	sdma_disable_channel(chan);
11251143 
....@@ -1159,9 +1177,7 @@
11591177 		sdmac->watermark_level = 0; /* FIXME: M3_BASE_ADDRESS */
11601178 	}
11611179 
1162
-	ret = sdma_load_context(sdmac);
1163
-
1164
-	return ret;
1180
+	return 0;
11651181 }
11661182 
11671183 static int sdma_set_channel_priority(struct sdma_channel *sdmac,
....@@ -1184,7 +1200,7 @@
11841200 {
11851201 	int ret = -EBUSY;
11861202 
1187
-	sdma->bd0 = dma_zalloc_coherent(NULL, PAGE_SIZE, &sdma->bd0_phys,
1203
+	sdma->bd0 = dma_alloc_coherent(sdma->dev, PAGE_SIZE, &sdma->bd0_phys,
11881204 					GFP_NOWAIT);
11891205 	if (!sdma->bd0) {
11901206 		ret = -ENOMEM;
....@@ -1207,8 +1223,8 @@
12071223 	u32 bd_size = desc->num_bd * sizeof(struct sdma_buffer_descriptor);
12081224 	int ret = 0;
12091225 
1210
-	desc->bd = dma_zalloc_coherent(NULL, bd_size, &desc->bd_phys,
1211
-					GFP_NOWAIT);
1226
+	desc->bd = dma_alloc_coherent(desc->sdmac->sdma->dev, bd_size,
1227
+				       &desc->bd_phys, GFP_NOWAIT);
12121228 	if (!desc->bd) {
12131229 		ret = -ENOMEM;
12141230 		goto out;
....@@ -1221,7 +1237,8 @@
12211237 {
12221238 	u32 bd_size = desc->num_bd * sizeof(struct sdma_buffer_descriptor);
12231239 
1224
-	dma_free_coherent(NULL, bd_size, desc->bd, desc->bd_phys);
1240
+	dma_free_coherent(desc->sdmac->sdma->dev, bd_size, desc->bd,
1241
+			  desc->bd_phys);
12251242 }
12261243 
12271244 static void sdma_desc_free(struct virt_dma_desc *vd)
....@@ -1301,12 +1318,11 @@
13011318 	struct sdma_channel *sdmac = to_sdma_chan(chan);
13021319 	struct sdma_engine *sdma = sdmac->sdma;
13031320 
1304
-	sdma_disable_channel_async(chan);
1321
+	sdma_terminate_all(chan);
13051322 
13061323 	sdma_channel_synchronize(chan);
13071324 
1308
-	if (sdmac->event_id0)
1309
-		sdma_event_disable(sdmac, sdmac->event_id0);
1325
+	sdma_event_disable(sdmac, sdmac->event_id0);
13101326 	if (sdmac->event_id1)
13111327 		sdma_event_disable(sdmac, sdmac->event_id1);
13121328 
....@@ -1605,11 +1621,9 @@
16051621 	memcpy(&sdmac->slave_config, dmaengine_cfg, sizeof(*dmaengine_cfg));
16061622 
16071623 	/* Set ENBLn earlier to make sure dma request triggered after that */
1608
-	if (sdmac->event_id0) {
1609
-		if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events)
1610
-			return -EINVAL;
1611
-		sdma_event_enable(sdmac, sdmac->event_id0);
1612
-	}
1624
+	if (sdmac->event_id0 >= sdmac->sdma->drvdata->num_events)
1625
+		return -EINVAL;
1626
+	sdma_event_enable(sdmac, sdmac->event_id0);
16131627 
16141628 	if (sdmac->event_id1) {
16151629 		if (sdmac->event_id1 >= sdmac->sdma->drvdata->num_events)
....@@ -1625,7 +1639,7 @@
16251639 				      struct dma_tx_state *txstate)
16261640 {
16271641 	struct sdma_channel *sdmac = to_sdma_chan(chan);
1628
-	struct sdma_desc *desc;
1642
+	struct sdma_desc *desc = NULL;
16291643 	u32 residue;
16301644 	struct virt_dma_desc *vd;
16311645 	enum dma_status ret;
....@@ -1636,19 +1650,23 @@
16361650 		return ret;
16371651 
16381652 	spin_lock_irqsave(&sdmac->vc.lock, flags);
1653
+
16391654 	vd = vchan_find_desc(&sdmac->vc, cookie);
1640
-	if (vd) {
1655
+	if (vd)
16411656 		desc = to_sdma_desc(&vd->tx);
1657
+	else if (sdmac->desc && sdmac->desc->vd.tx.cookie == cookie)
1658
+		desc = sdmac->desc;
1659
+
1660
+	if (desc) {
16421661 		if (sdmac->flags & IMX_DMA_SG_LOOP)
16431662 			residue = (desc->num_bd - desc->buf_ptail) *
16441663 				desc->period_len - desc->chn_real_count;
16451664 		else
16461665 			residue = desc->chn_count - desc->chn_real_count;
1647
-	} else if (sdmac->desc && sdmac->desc->vd.tx.cookie == cookie) {
1648
-		residue = sdmac->desc->chn_count - sdmac->desc->chn_real_count;
16491666 	} else {
16501667 		residue = 0;
16511668 	}
1669
+
16521670 	spin_unlock_irqrestore(&sdmac->vc.lock, flags);
16531671 
16541672 	dma_set_tx_state(txstate, chan->completed_cookie, chan->cookie,
....@@ -1771,7 +1789,7 @@
17711789 	u32 reg, val, shift, num_map, i;
17721790 	int ret = 0;
17731791 
1774
-	if (IS_ERR(np) || IS_ERR(gpr_np))
1792
+	if (IS_ERR(np) || !gpr_np)
17751793 		goto out;
17761794 
17771795 	event_remap = of_find_property(np, propname, NULL);
....@@ -1819,7 +1837,7 @@
18191837 	}
18201838 
18211839 out:
1822
-	if (!IS_ERR(gpr_np))
1840
+	if (gpr_np)
18231841 		of_node_put(gpr_np);
18241842 
18251843 	return ret;
....@@ -1849,10 +1867,14 @@
18491867 	if (ret)
18501868 		goto disable_clk_ipg;
18511869 
1870
+	if (sdma->drvdata->check_ratio &&
1871
+	    (clk_get_rate(sdma->clk_ahb) == clk_get_rate(sdma->clk_ipg)))
1872
+		sdma->clk_ratio = 1;
1873
+
18521874 	/* Be sure SDMA has not started yet */
18531875 	writel_relaxed(0, sdma->regs + SDMA_H_C0PTR);
18541876 
1855
-	sdma->channel_control = dma_alloc_coherent(NULL,
1877
+	sdma->channel_control = dma_alloc_coherent(sdma->dev,
18561878 			MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control) +
18571879 			sizeof(struct sdma_context_data),
18581880 			&ccb_phys, GFP_KERNEL);
....@@ -1866,10 +1888,6 @@
18661888 		MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control);
18671889 	sdma->context_phys = ccb_phys +
18681890 		MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control);
1869
-
1870
-	/* Zero-out the CCB structures array just allocated */
1871
-	memset(sdma->channel_control, 0,
1872
-			MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control));
18731891 
18741892 	/* disable all channels */
18751893 	for (i = 0; i < sdma->drvdata->num_events; i++)
....@@ -1889,8 +1907,10 @@
18891907 	writel_relaxed(0x4050, sdma->regs + SDMA_CHN0ADDR);
18901908 
18911909 	/* Set bits of CONFIG register but with static context switching */
1892
-	/* FIXME: Check whether to set ACR bit depending on clock ratios */
1893
-	writel_relaxed(0, sdma->regs + SDMA_H_CONFIG);
1910
+	if (sdma->clk_ratio)
1911
+		writel_relaxed(SDMA_H_CONFIG_ACR, sdma->regs + SDMA_H_CONFIG);
1912
+	else
1913
+		writel_relaxed(0, sdma->regs + SDMA_H_CONFIG);
18941914 
18951915 	writel_relaxed(ccb_phys, sdma->regs + SDMA_H_C0PTR);
18961916 
....@@ -1946,7 +1966,8 @@
19461966 	 */
19471967 	data.dma_request2 = 0;
19481968 
1949
-	return dma_request_channel(mask, sdma_filter_fn, &data);
1969
+	return __dma_request_channel(&mask, sdma_filter_fn, &data,
1970
+				     ofdma->of_node);
19501971 }
19511972 
19521973 static int sdma_probe(struct platform_device *pdev)
....@@ -2029,7 +2050,7 @@
20292050 
20302051 	/* initially no scripts available */
20312052 	saddr_arr = (s32 *)sdma->script_addrs;
2032
-	for (i = 0; i < SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V1; i++)
2053
+	for (i = 0; i < sizeof(*sdma->script_addrs) / sizeof(s32); i++)
20332054 		saddr_arr[i] = -EINVAL;
20342055 
20352056 	dma_cap_set(DMA_SLAVE, sdma->dma_device.cap_mask);
....@@ -2077,7 +2098,7 @@
20772098 	sdma->dma_device.device_prep_slave_sg = sdma_prep_slave_sg;
20782099 	sdma->dma_device.device_prep_dma_cyclic = sdma_prep_dma_cyclic;
20792100 	sdma->dma_device.device_config = sdma_config;
2080
-	sdma->dma_device.device_terminate_all = sdma_disable_channel_async;
2101
+	sdma->dma_device.device_terminate_all = sdma_terminate_all;
20812102 	sdma->dma_device.device_synchronize = sdma_channel_synchronize;
20822103 	sdma->dma_device.src_addr_widths = SDMA_DMA_BUSWIDTHS;
20832104 	sdma->dma_device.dst_addr_widths = SDMA_DMA_BUSWIDTHS;
....@@ -2085,7 +2106,7 @@
20852106 	sdma->dma_device.residue_granularity = DMA_RESIDUE_GRANULARITY_SEGMENT;
20862107 	sdma->dma_device.device_prep_dma_memcpy = sdma_prep_memcpy;
20872108 	sdma->dma_device.device_issue_pending = sdma_issue_pending;
2088
-	sdma->dma_device.dev->dma_parms = &sdma->dma_parms;
2109
+	sdma->dma_device.copy_align = 2;
20892110 	dma_set_max_seg_size(sdma->dma_device.dev, SDMA_BD_MAX_CNT);
20902111 
20912112 	platform_set_drvdata(pdev, sdma);
....@@ -2191,7 +2212,7 @@
21912212 #if IS_ENABLED(CONFIG_SOC_IMX6Q)
21922213 MODULE_FIRMWARE("imx/sdma/sdma-imx6q.bin");
21932214 #endif
2194
-#if IS_ENABLED(CONFIG_SOC_IMX7D)
2215
+#if IS_ENABLED(CONFIG_SOC_IMX7D) || IS_ENABLED(CONFIG_SOC_IMX8M)
21952216 MODULE_FIRMWARE("imx/sdma/sdma-imx7d.bin");
21962217 #endif
21972218 MODULE_LICENSE("GPL");