Merge tag 'fpga-for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/mdf/linux-fpga into char-misc-next

Moritz writes:

FPGA Manager changes for 5.9-rc1

Here is the (slightly larger than usual) patch set for the 5.9-rc1 merge
window.

DFL:
- Xu's changes add support for AFU interrupt handling and puts them to
  use for error handling.
- Xu's other change also adds another device-id for the Intel FPGA PAC N3000.
- John's change converts from using get_user_pages() to
  pin_user_pages().
- Gustavo's patch cleans up some of the allocation by using
  struct_size().

Xilinx:
- Luca's changes clean up the xilinx-spi and xilinx-slave-serial drivers
  and updates the comments and dt-bindings to reflect the fact it also
  supports 7 series devices.

Core:
- Tom cleaned up the fpga-bridge / fpga-mgr core by removing some
  dead-stores.

All patches have been reviewed on the mailing list, and have been in the
last few linux-next releases (as part of my for-next branch) without issues.

Signed-off-by: Moritz Fischer <mdf@kernel.org>

* tag 'fpga-for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/mdf/linux-fpga:
  fpga: dfl: pci: add device id for Intel FPGA PAC N3000
  Documentation: fpga: dfl: add descriptions for interrupt related interfaces.
  fpga: dfl: afu: add AFU interrupt support
  fpga: dfl: fme: add interrupt support for global error reporting
  fpga: dfl: afu: add interrupt support for port error reporting
  fpga: dfl: introduce interrupt trigger setting API
  fpga: dfl: pci: add irq info for feature devices enumeration
  fpga: dfl: parse interrupt info for feature devices on enumeration
  fpga manager: xilinx-spi: check INIT_B pin during write_init
  dt-bindings: fpga: xilinx-slave-serial: add optional INIT_B GPIO
  fpga: Fix dead store in fpga-bridge.c
  fpga: Fix dead store fpga-mgr.c
  fpga: dfl: Use struct_size() in kzalloc()
  fpga manager: xilinx-spi: remove unneeded, mistyped variables
  fpga manager: xilinx-spi: valid for the 7 Series too
  dt-bindings: fpga: xilinx-slave-serial: valid for the 7 Series too
  fpga: dfl: afu: convert get_user_pages() --> pin_user_pages()

1 files changed, 69 insertions, 9 deletions

diff --git a/drivers/fpga/dfl-pci.c b/drivers/fpga/dfl-pci.c
index 538755062ab7..3408bb8f1c65 100644
--- a/drivers/fpga/dfl-pci.c
+++ b/drivers/fpga/dfl-pci.c
@@ -39,10 +39,32 @@ static void __iomem *cci_pci_ioremap_bar(struct pci_dev *pcidev, int bar)
 	return pcim_iomap_table(pcidev)[bar];
 }
 
+static int cci_pci_alloc_irq(struct pci_dev *pcidev)
+{
+	int ret, nvec = pci_msix_vec_count(pcidev);
+
+	if (nvec <= 0) {
+		dev_dbg(&pcidev->dev, "fpga interrupt not supported\n");
+		return 0;
+	}
+
+	ret = pci_alloc_irq_vectors(pcidev, nvec, nvec, PCI_IRQ_MSIX);
+	if (ret < 0)
+		return ret;
+
+	return nvec;
+}
+
+static void cci_pci_free_irq(struct pci_dev *pcidev)
+{
+	pci_free_irq_vectors(pcidev);
+}
+
 /* PCI Device ID */
 #define PCIE_DEVICE_ID_PF_INT_5_X	0xBCBD
 #define PCIE_DEVICE_ID_PF_INT_6_X	0xBCC0
 #define PCIE_DEVICE_ID_PF_DSC_1_X	0x09C4
+#define PCIE_DEVICE_ID_INTEL_PAC_N3000	0x0B30
 /* VF Device */
 #define PCIE_DEVICE_ID_VF_INT_5_X	0xBCBF
 #define PCIE_DEVICE_ID_VF_INT_6_X	0xBCC1
@@ -55,6 +77,7 @@ static struct pci_device_id cci_pcie_id_tbl[] = {
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_VF_INT_6_X),},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_PF_DSC_1_X),},
 	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_VF_DSC_1_X),},
+	{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCIE_DEVICE_ID_INTEL_PAC_N3000),},
 	{0,}
 };
 MODULE_DEVICE_TABLE(pci, cci_pcie_id_tbl);
@@ -78,17 +101,34 @@ static void cci_remove_feature_devs(struct pci_dev *pcidev)
 
 	/* remove all children feature devices */
 	dfl_fpga_feature_devs_remove(drvdata->cdev);
+	cci_pci_free_irq(pcidev);
+}
+
+static int *cci_pci_create_irq_table(struct pci_dev *pcidev, unsigned int nvec)
+{
+	unsigned int i;
+	int *table;
+
+	table = kcalloc(nvec, sizeof(int), GFP_KERNEL);
+	if (!table)
+		return table;
+
+	for (i = 0; i < nvec; i++)
+		table[i] = pci_irq_vector(pcidev, i);
+
+	return table;
 }
 
 /* enumerate feature devices under pci device */
 static int cci_enumerate_feature_devs(struct pci_dev *pcidev)
 {
 	struct cci_drvdata *drvdata = pci_get_drvdata(pcidev);
+	int port_num, bar, i, nvec, ret = 0;
 	struct dfl_fpga_enum_info *info;
 	struct dfl_fpga_cdev *cdev;
 	resource_size_t start, len;
-	int port_num, bar, i, ret = 0;
 	void __iomem *base;
+	int *irq_table;
 	u32 offset;
 	u64 v;
 
@@ -97,11 +137,30 @@ static int cci_enumerate_feature_devs(struct pci_dev *pcidev)
 	if (!info)
 		return -ENOMEM;
 
+	/* add irq info for enumeration if the device support irq */
+	nvec = cci_pci_alloc_irq(pcidev);
+	if (nvec < 0) {
+		dev_err(&pcidev->dev, "Fail to alloc irq %d.\n", nvec);
+		ret = nvec;
+		goto enum_info_free_exit;
+	} else if (nvec) {
+		irq_table = cci_pci_create_irq_table(pcidev, nvec);
+		if (!irq_table) {
+			ret = -ENOMEM;
+			goto irq_free_exit;
+		}
+
+		ret = dfl_fpga_enum_info_add_irq(info, nvec, irq_table);
+		kfree(irq_table);
+		if (ret)
+			goto irq_free_exit;
+	}
+
 	/* start to find Device Feature List from Bar 0 */
 	base = cci_pci_ioremap_bar(pcidev, 0);
 	if (!base) {
 		ret = -ENOMEM;
-		goto enum_info_free_exit;
+		goto irq_free_exit;
 	}
 
 	/*
@@ -154,7 +213,7 @@ static int cci_enumerate_feature_devs(struct pci_dev *pcidev)
 		dfl_fpga_enum_info_add_dfl(info, start, len, base);
 	} else {
 		ret = -ENODEV;
-		goto enum_info_free_exit;
+		goto irq_free_exit;
 	}
 
 	/* start enumeration with prepared enumeration information */
@@ -162,11 +221,14 @@ static int cci_enumerate_feature_devs(struct pci_dev *pcidev)
 	if (IS_ERR(cdev)) {
 		dev_err(&pcidev->dev, "Enumeration failure\n");
 		ret = PTR_ERR(cdev);
-		goto enum_info_free_exit;
+		goto irq_free_exit;
 	}
 
 	drvdata->cdev = cdev;
 
+irq_free_exit:
+	if (ret)
+		cci_pci_free_irq(pcidev);
 enum_info_free_exit:
 	dfl_fpga_enum_info_free(info);
 
@@ -211,12 +273,10 @@ int cci_pci_probe(struct pci_dev *pcidev, const struct pci_device_id *pcidevid)
 	}
 
 	ret = cci_enumerate_feature_devs(pcidev);
-	if (ret) {
-		dev_err(&pcidev->dev, "enumeration failure %d.\n", ret);
-		goto disable_error_report_exit;
-	}
+	if (!ret)
+		return ret;
 
-	return ret;
+	dev_err(&pcidev->dev, "enumeration failure %d.\n", ret);
 
 disable_error_report_exit:
 	pci_disable_pcie_error_reporting(pcidev);