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2024-05-13 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e 
 kernel/drivers/infiniband/hw/hfi1/pcie.c
....@@ -1,5 +1,5 @@
11 /*
2
- * Copyright(c) 2015 - 2017 Intel Corporation.
2
+ * Copyright(c) 2015 - 2019 Intel Corporation.
33  *
44  * This file is provided under a dual BSD/GPLv2 license.  When using or
55  * redistributing this file, you may do so under either license.
....@@ -61,19 +61,12 @@
6161  */
6262 
6363 /*
64
- * Code to adjust PCIe capabilities.
65
- */
66
-static void tune_pcie_caps(struct hfi1_devdata *);
67
-
68
-/*
6964  * Do all the common PCIe setup and initialization.
70
- * devdata is not yet allocated, and is not allocated until after this
71
- * routine returns success.  Therefore dd_dev_err() can't be used for error
72
- * printing.
7365  */
74
-int hfi1_pcie_init(struct pci_dev *pdev, const struct pci_device_id *ent)
66
+int hfi1_pcie_init(struct hfi1_devdata *dd)
7567 {
7668 	int ret;
69
+	struct pci_dev *pdev = dd->pcidev;
7770 
7871 	ret = pci_enable_device(pdev);
7972 	if (ret) {
....@@ -89,15 +82,13 @@
8982 		 * about that, it appears.  If the original BAR was retained
9083 		 * in the kernel data structures, this may be OK.
9184 		 */
92
-		hfi1_early_err(&pdev->dev, "pci enable failed: error %d\n",
93
-			       -ret);
94
-		goto done;
85
+		dd_dev_err(dd, "pci enable failed: error %d\n", -ret);
86
+		return ret;
9587 	}
9688 
9789 	ret = pci_request_regions(pdev, DRIVER_NAME);
9890 	if (ret) {
99
-		hfi1_early_err(&pdev->dev,
100
-			       "pci_request_regions fails: err %d\n", -ret);
91
+		dd_dev_err(dd, "pci_request_regions fails: err %d\n", -ret);
10192 		goto bail;
10293 	}
10394 
....@@ -110,8 +101,7 @@
110101 		 */
111102 		ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
112103 		if (ret) {
113
-			hfi1_early_err(&pdev->dev,
114
-				       "Unable to set DMA mask: %d\n", ret);
104
+			dd_dev_err(dd, "Unable to set DMA mask: %d\n", ret);
115105 			goto bail;
116106 		}
117107 		ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
....@@ -119,18 +109,16 @@
119109 		ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
120110 	}
121111 	if (ret) {
122
-		hfi1_early_err(&pdev->dev,
123
-			       "Unable to set DMA consistent mask: %d\n", ret);
112
+		dd_dev_err(dd, "Unable to set DMA consistent mask: %d\n", ret);
124113 		goto bail;
125114 	}
126115 
127116 	pci_set_master(pdev);
128117 	(void)pci_enable_pcie_error_reporting(pdev);
129
-	goto done;
118
+	return 0;
130119 
131120 bail:
132121 	hfi1_pcie_cleanup(pdev);
133
-done:
134122 	return ret;
135123 }
136124 
....@@ -173,7 +161,7 @@
173161 		return -EINVAL;
174162 	}
175163 
176
-	dd->kregbase1 = ioremap_nocache(addr, RCV_ARRAY);
164
+	dd->kregbase1 = ioremap(addr, RCV_ARRAY);
177165 	if (!dd->kregbase1) {
178166 		dd_dev_err(dd, "UC mapping of kregbase1 failed\n");
179167 		return -ENOMEM;
....@@ -191,7 +179,7 @@
191179 	dd_dev_info(dd, "RcvArray count: %u\n", rcv_array_count);
192180 	dd->base2_start  = RCV_ARRAY + rcv_array_count * 8;
193181 
194
-	dd->kregbase2 = ioremap_nocache(
182
+	dd->kregbase2 = ioremap(
195183 		addr + dd->base2_start,
196184 		TXE_PIO_SEND - dd->base2_start);
197185 	if (!dd->kregbase2) {
....@@ -206,7 +194,7 @@
206194 		dd_dev_err(dd, "WC mapping of send buffers failed\n");
207195 		goto nomem;
208196 	}
209
-	dd_dev_info(dd, "WC piobase: %p\n for %x", dd->piobase, TXE_PIO_SIZE);
197
+	dd_dev_info(dd, "WC piobase: %p for %x\n", dd->piobase, TXE_PIO_SIZE);
210198 
211199 	dd->physaddr = addr;        /* used for io_remap, etc. */
212200 
....@@ -318,7 +306,7 @@
318306 	ret = pcie_capability_read_dword(dd->pcidev, PCI_EXP_LNKCAP, &linkcap);
319307 	if (ret) {
320308 		dd_dev_err(dd, "Unable to read from PCI config\n");
321
-		return ret;
309
+		return pcibios_err_to_errno(ret);
322310 	}
323311 
324312 	if ((linkcap & PCI_EXP_LNKCAP_SLS) != PCI_EXP_LNKCAP_SLS_8_0GB) {
....@@ -346,30 +334,14 @@
346334 	return 0;
347335 }
348336 
349
-/*
350
- * Returns:
351
- *	- actual number of interrupts allocated or
352
- *      - error
337
+/**
338
+ * Restore command and BARs after a reset has wiped them out
339
+ *
340
+ * Returns 0 on success, otherwise a negative error value
353341  */
354
-int request_msix(struct hfi1_devdata *dd, u32 msireq)
355
-{
356
-	int nvec;
357
-
358
-	nvec = pci_alloc_irq_vectors(dd->pcidev, msireq, msireq, PCI_IRQ_MSIX);
359
-	if (nvec < 0) {
360
-		dd_dev_err(dd, "pci_alloc_irq_vectors() failed: %d\n", nvec);
361
-		return nvec;
362
-	}
363
-
364
-	tune_pcie_caps(dd);
365
-
366
-	return nvec;
367
-}
368
-
369
-/* restore command and BARs after a reset has wiped them out */
370342 int restore_pci_variables(struct hfi1_devdata *dd)
371343 {
372
-	int ret = 0;
344
+	int ret;
373345 
374346 	ret = pci_write_config_word(dd->pcidev, PCI_COMMAND, dd->pci_command);
375347 	if (ret)
....@@ -418,13 +390,17 @@
418390 
419391 error:
420392 	dd_dev_err(dd, "Unable to write to PCI config\n");
421
-	return ret;
393
+	return pcibios_err_to_errno(ret);
422394 }
423395 
424
-/* Save BARs and command to rewrite after device reset */
396
+/**
397
+ * Save BARs and command to rewrite after device reset
398
+ *
399
+ * Returns 0 on success, otherwise a negative error value
400
+ */
425401 int save_pci_variables(struct hfi1_devdata *dd)
426402 {
427
-	int ret = 0;
403
+	int ret;
428404 
429405 	ret = pci_read_config_dword(dd->pcidev, PCI_BASE_ADDRESS_0,
430406 				    &dd->pcibar0);
....@@ -473,7 +449,7 @@
473449 
474450 error:
475451 	dd_dev_err(dd, "Unable to read from PCI config\n");
476
-	return ret;
452
+	return pcibios_err_to_errno(ret);
477453 }
478454 
479455 /*
....@@ -481,14 +457,15 @@
481457  * Check and optionally adjust them to maximize our throughput.
482458  */
483459 static int hfi1_pcie_caps;
484
-module_param_named(pcie_caps, hfi1_pcie_caps, int, S_IRUGO);
460
+module_param_named(pcie_caps, hfi1_pcie_caps, int, 0444);
485461 MODULE_PARM_DESC(pcie_caps, "Max PCIe tuning: Payload (0..3), ReadReq (4..7)");
486462 
487
-uint aspm_mode = ASPM_MODE_DISABLED;
488
-module_param_named(aspm, aspm_mode, uint, S_IRUGO);
489
-MODULE_PARM_DESC(aspm, "PCIe ASPM: 0: disable, 1: enable, 2: dynamic");
490
-
491
-static void tune_pcie_caps(struct hfi1_devdata *dd)
463
+/**
464
+ * tune_pcie_caps() - Code to adjust PCIe capabilities.
465
+ * @dd: Valid device data structure
466
+ *
467
+ */
468
+void tune_pcie_caps(struct hfi1_devdata *dd)
492469 {
493470 	struct pci_dev *parent;
494471 	u16 rc_mpss, rc_mps, ep_mpss, ep_mps;
....@@ -652,7 +629,6 @@
652629 	struct hfi1_devdata *dd = pci_get_drvdata(pdev);
653630 
654631 	dd_dev_info(dd, "HFI1 resume function called\n");
655
-	pci_cleanup_aer_uncorrect_error_status(pdev);
656632 	/*
657633 	 * Running jobs will fail, since it's asynchronous
658634 	 * unlike sysfs-requested reset.   Better than
....@@ -1031,6 +1007,7 @@
10311007 	const u8 (*ctle_tunings)[4];
10321008 	uint static_ctle_mode;
10331009 	int return_error = 0;
1010
+	u32 target_width;
10341011 
10351012 	/* PCIe Gen3 is for the ASIC only */
10361013 	if (dd->icode != ICODE_RTL_SILICON)
....@@ -1069,6 +1046,9 @@
10691046 			    __func__);
10701047 		return 0;
10711048 	}
1049
+
1050
+	/* Previous Gen1/Gen2 bus width */
1051
+	target_width = dd->lbus_width;
10721052 
10731053 	/*
10741054 	 * Do the Gen3 transition.  Steps are those of the PCIe Gen3
....@@ -1438,11 +1418,12 @@
14381418 	dd_dev_info(dd, "%s: new speed and width: %s\n", __func__,
14391419 		    dd->lbus_info);
14401420 
1441
-	if (dd->lbus_speed != target_speed) { /* not target */
1421
+	if (dd->lbus_speed != target_speed ||
1422
+	    dd->lbus_width < target_width) { /* not target */
14421423 		/* maybe retry */
14431424 		do_retry = retry_count < pcie_retry;
1444
-		dd_dev_err(dd, "PCIe link speed did not switch to Gen%d%s\n",
1445
-			   pcie_target, do_retry ? ", retrying" : "");
1425
+		dd_dev_err(dd, "PCIe link speed or width did not match target%s\n",
1426
+			   do_retry ? ", retrying" : "");
14461427 		retry_count++;
14471428 		if (do_retry) {
14481429 			msleep(100); /* allow time to settle */