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2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/drivers/dma/ioat/init.c
....@@ -1,19 +1,7 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Intel I/OAT DMA Linux driver
34  * Copyright(c) 2004 - 2015 Intel Corporation.
4
- *
5
- * This program is free software; you can redistribute it and/or modify it
6
- * under the terms and conditions of the GNU General Public License,
7
- * version 2, as published by the Free Software Foundation.
8
- *
9
- * This program is distributed in the hope that it will be useful, but WITHOUT
10
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12
- * more details.
13
- *
14
- * The full GNU General Public License is included in this distribution in
15
- * the file called "COPYING".
16
- *
175  */
186 
197 #include <linux/init.h>
....@@ -119,6 +107,9 @@
119107 	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE2) },
120108 	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE3) },
121109 
110
+	/* I/OAT v3.4 platforms */
111
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_ICX) },
112
+
122113 	{ 0, }
123114 };
124115 MODULE_DEVICE_TABLE(pci, ioat_pci_tbl);
....@@ -135,10 +126,10 @@
135126 static int ioat_dca_enabled = 1;
136127 module_param(ioat_dca_enabled, int, 0644);
137128 MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)");
138
-int ioat_pending_level = 4;
129
+int ioat_pending_level = 7;
139130 module_param(ioat_pending_level, int, 0644);
140131 MODULE_PARM_DESC(ioat_pending_level,
141
-		 "high-water mark for pushing ioat descriptors (default: 4)");
132
+		 "high-water mark for pushing ioat descriptors (default: 7)");
142133 static char ioat_interrupt_style[32] = "msix";
143134 module_param_string(ioat_interrupt_style, ioat_interrupt_style,
144135 		    sizeof(ioat_interrupt_style), 0644);
....@@ -565,10 +556,6 @@
565556 	ioat_kobject_del(ioat_dma);
566557 
567558 	dma_async_device_unregister(dma);
568
-
569
-	dma_pool_destroy(ioat_dma->completion_pool);
570
-
571
-	INIT_LIST_HEAD(&dma->channels);
572559 }
573560 
574561 /**
....@@ -598,7 +585,7 @@
598585 	dev_dbg(dev, "%s: xfercap = %d\n", __func__, 1 << xfercap_log);
599586 
600587 	for (i = 0; i < dma->chancnt; i++) {
601
-		ioat_chan = devm_kzalloc(dev, sizeof(*ioat_chan), GFP_KERNEL);
588
+		ioat_chan = kzalloc(sizeof(*ioat_chan), GFP_KERNEL);
602589 		if (!ioat_chan)
603590 			break;
604591 
....@@ -615,7 +602,7 @@
615602 
616603 /**
617604  * ioat_free_chan_resources - release all the descriptors
618
- * @chan: the channel to be cleaned
605
+ * @c: the channel to be cleaned
619606  */
620607 static void ioat_free_chan_resources(struct dma_chan *c)
621608 {
....@@ -633,7 +620,16 @@
633620 		return;
634621 
635622 	ioat_stop(ioat_chan);
636
-	ioat_reset_hw(ioat_chan);
623
+
624
+	if (!test_bit(IOAT_CHAN_DOWN, &ioat_chan->state)) {
625
+		ioat_reset_hw(ioat_chan);
626
+
627
+		/* Put LTR to idle */
628
+		if (ioat_dma->version >= IOAT_VER_3_4)
629
+			writeb(IOAT_CHAN_LTR_SWSEL_IDLE,
630
+			       ioat_chan->reg_base +
631
+			       IOAT_CHAN_LTR_SWSEL_OFFSET);
632
+	}
637633 
638634 	spin_lock_bh(&ioat_chan->cleanup_lock);
639635 	spin_lock_bh(&ioat_chan->prep_lock);
....@@ -655,7 +651,7 @@
655651 	}
656652 
657653 	for (i = 0; i < ioat_chan->desc_chunks; i++) {
658
-		dma_free_coherent(to_dev(ioat_chan), SZ_2M,
654
+		dma_free_coherent(to_dev(ioat_chan), IOAT_CHUNK_SIZE,
659655 				  ioat_chan->descs[i].virt,
660656 				  ioat_chan->descs[i].hw);
661657 		ioat_chan->descs[i].virt = NULL;
....@@ -724,6 +720,28 @@
724720 	spin_unlock_bh(&ioat_chan->prep_lock);
725721 	spin_unlock_bh(&ioat_chan->cleanup_lock);
726722 
723
+	/* Setting up LTR values for 3.4 or later */
724
+	if (ioat_chan->ioat_dma->version >= IOAT_VER_3_4) {
725
+		u32 lat_val;
726
+
727
+		lat_val = IOAT_CHAN_LTR_ACTIVE_SNVAL |
728
+			IOAT_CHAN_LTR_ACTIVE_SNLATSCALE |
729
+			IOAT_CHAN_LTR_ACTIVE_SNREQMNT;
730
+		writel(lat_val, ioat_chan->reg_base +
731
+				IOAT_CHAN_LTR_ACTIVE_OFFSET);
732
+
733
+		lat_val = IOAT_CHAN_LTR_IDLE_SNVAL |
734
+			  IOAT_CHAN_LTR_IDLE_SNLATSCALE |
735
+			  IOAT_CHAN_LTR_IDLE_SNREQMNT;
736
+		writel(lat_val, ioat_chan->reg_base +
737
+				IOAT_CHAN_LTR_IDLE_OFFSET);
738
+
739
+		/* Select to active */
740
+		writeb(IOAT_CHAN_LTR_SWSEL_ACTIVE,
741
+		       ioat_chan->reg_base +
742
+		       IOAT_CHAN_LTR_SWSEL_OFFSET);
743
+	}
744
+
727745 	ioat_start_null_desc(ioat_chan);
728746 
729747 	/* check that we got off the ground */
....@@ -749,8 +767,6 @@
749767 		  struct ioatdma_chan *ioat_chan, int idx)
750768 {
751769 	struct dma_device *dma = &ioat_dma->dma_dev;
752
-	struct dma_chan *c = &ioat_chan->dma_chan;
753
-	unsigned long data = (unsigned long) c;
754770 
755771 	ioat_chan->ioat_dma = ioat_dma;
756772 	ioat_chan->reg_base = ioat_dma->reg_base + (0x80 * (idx + 1));
....@@ -760,7 +776,7 @@
760776 	list_add_tail(&ioat_chan->dma_chan.device_node, &dma->channels);
761777 	ioat_dma->idx[idx] = ioat_chan;
762778 	timer_setup(&ioat_chan->timer, ioat_timer_event, 0);
763
-	tasklet_init(&ioat_chan->cleanup_task, ioat_cleanup_event, data);
779
+	tasklet_setup(&ioat_chan->cleanup_task, ioat_cleanup_event);
764780 }
765781 
766782 #define IOAT_NUM_SRC_TEST 6 /* must be <= 8 */
....@@ -1177,13 +1193,17 @@
11771193 	/* disable relaxed ordering */
11781194 	err = pcie_capability_read_word(pdev, IOAT_DEVCTRL_OFFSET, &val16);
11791195 	if (err)
1180
-		return err;
1196
+		return pcibios_err_to_errno(err);
11811197 
11821198 	/* clear relaxed ordering enable */
11831199 	val16 &= ~IOAT_DEVCTRL_ROE;
11841200 	err = pcie_capability_write_word(pdev, IOAT_DEVCTRL_OFFSET, val16);
11851201 	if (err)
1186
-		return err;
1202
+		return pcibios_err_to_errno(err);
1203
+
1204
+	if (ioat_dma->cap & IOAT_CAP_DPS)
1205
+		writeb(ioat_pending_level + 1,
1206
+		       ioat_dma->reg_base + IOAT_PREFETCH_LIMIT_OFFSET);
11871207 
11881208 	return 0;
11891209 }
....@@ -1245,7 +1265,7 @@
12451265 #define DRV_NAME "ioatdma"
12461266 
12471267 static pci_ers_result_t ioat_pcie_error_detected(struct pci_dev *pdev,
1248
-						 enum pci_channel_state error)
1268
+						 pci_channel_state_t error)
12491269 {
12501270 	dev_dbg(&pdev->dev, "%s: PCIe AER error %d\n", DRV_NAME, error);
12511271 
....@@ -1258,7 +1278,6 @@
12581278 static pci_ers_result_t ioat_pcie_error_slot_reset(struct pci_dev *pdev)
12591279 {
12601280 	pci_ers_result_t result = PCI_ERS_RESULT_RECOVERED;
1261
-	int err;
12621281 
12631282 	dev_dbg(&pdev->dev, "%s post reset handling\n", DRV_NAME);
12641283 
....@@ -1271,12 +1290,6 @@
12711290 		pci_restore_state(pdev);
12721291 		pci_save_state(pdev);
12731292 		pci_wake_from_d3(pdev, false);
1274
-	}
1275
-
1276
-	err = pci_cleanup_aer_uncorrect_error_status(pdev);
1277
-	if (err) {
1278
-		dev_err(&pdev->dev,
1279
-			"AER uncorrect error status clear failed: %#x\n", err);
12801293 	}
12811294 
12821295 	return result;
....@@ -1307,16 +1320,28 @@
13071320 	.err_handler	= &ioat_err_handler,
13081321 };
13091322 
1323
+static void release_ioatdma(struct dma_device *device)
1324
+{
1325
+	struct ioatdma_device *d = to_ioatdma_device(device);
1326
+	int i;
1327
+
1328
+	for (i = 0; i < IOAT_MAX_CHANS; i++)
1329
+		kfree(d->idx[i]);
1330
+
1331
+	dma_pool_destroy(d->completion_pool);
1332
+	kfree(d);
1333
+}
1334
+
13101335 static struct ioatdma_device *
13111336 alloc_ioatdma(struct pci_dev *pdev, void __iomem *iobase)
13121337 {
1313
-	struct device *dev = &pdev->dev;
1314
-	struct ioatdma_device *d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL);
1338
+	struct ioatdma_device *d = kzalloc(sizeof(*d), GFP_KERNEL);
13151339 
13161340 	if (!d)
13171341 		return NULL;
13181342 	d->pdev = pdev;
13191343 	d->reg_base = iobase;
1344
+	d->dma_dev.device_release = release_ioatdma;
13201345 	return d;
13211346 }
13221347 
....@@ -1357,6 +1382,8 @@
13571382 	pci_set_drvdata(pdev, device);
13581383 
13591384 	device->version = readb(device->reg_base + IOAT_VER_OFFSET);
1385
+	if (device->version >= IOAT_VER_3_4)
1386
+		ioat_dca_enabled = 0;
13601387 	if (device->version >= IOAT_VER_3_0) {
13611388 		if (is_skx_ioat(pdev))
13621389 			device->version = IOAT_VER_3_2;
....@@ -1383,6 +1410,8 @@
13831410 	if (!device)
13841411 		return;
13851412 
1413
+	ioat_shutdown(pdev);
1414
+
13861415 	dev_err(&pdev->dev, "Removing dma and dca services\n");
13871416 	if (device->dca) {
13881417 		unregister_dca_provider(device->dca, &pdev->dev);