[v7,6/7] drm/etnaviv: add driver support for the PCI devices

diff --git a/drivers/gpu/drm/etnaviv/Kconfig b/drivers/gpu/drm/etnaviv/Kconfig
index faa7fc68b009..dbf948f99976 100644
--- a/drivers/gpu/drm/etnaviv/Kconfig
+++ b/drivers/gpu/drm/etnaviv/Kconfig
@@ -15,6 +15,15 @@  config DRM_ETNAVIV
 	help
 	  DRM driver for Vivante GPUs.
 
+config DRM_ETNAVIV_PCI_DRIVER
+	bool "enable ETNAVIV PCI driver support"
+	depends on DRM_ETNAVIV
+	depends on PCI
+	default y
+	help
+	  Compile in support for PCI GPUs of Vivante.
+	  Say Y if you have such a hardware.
+
 config DRM_ETNAVIV_THERMAL
 	bool "enable ETNAVIV thermal throttling"
 	depends on DRM_ETNAVIV
diff --git a/drivers/gpu/drm/etnaviv/Makefile b/drivers/gpu/drm/etnaviv/Makefile
index 46e5ffad69a6..6829e1ebf2db 100644
--- a/drivers/gpu/drm/etnaviv/Makefile
+++ b/drivers/gpu/drm/etnaviv/Makefile
@@ -16,4 +16,6 @@  etnaviv-y := \
 	etnaviv_perfmon.o \
 	etnaviv_sched.o
 
+etnaviv-$(CONFIG_DRM_ETNAVIV_PCI_DRIVER) += etnaviv_pci_drv.o
+
 obj-$(CONFIG_DRM_ETNAVIV)	+= etnaviv.o
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
index 93ca240cd4c0..033afe542a3a 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
@@ -23,6 +23,10 @@ 
 #include "etnaviv_mmu.h"
 #include "etnaviv_perfmon.h"
 
+#ifdef CONFIG_DRM_ETNAVIV_PCI_DRIVER
+#include "etnaviv_pci_drv.h"
+#endif
+
 /*
  * etnaviv private data construction and destructions:
  */
@@ -538,7 +542,7 @@  static const struct drm_driver etnaviv_drm_driver = {
 
 static struct etnaviv_drm_private *etna_private_ptr;
 
-static int etnaviv_drm_bind(struct device *dev, bool component)
+int etnaviv_drm_bind(struct device *dev, bool component)
 {
 	struct etnaviv_drm_private *priv;
 	struct drm_device *drm;
@@ -588,7 +592,7 @@  static int etnaviv_drm_bind(struct device *dev, bool component)
 	return ret;
 }
 
-static void etnaviv_drm_unbind(struct device *dev, bool component)
+void etnaviv_drm_unbind(struct device *dev, bool component)
 {
 	struct etnaviv_drm_private *priv = etna_private_ptr;
 	struct drm_device *drm = priv->drm;
@@ -746,6 +750,12 @@  static int __init etnaviv_init(void)
 	if (ret != 0)
 		goto unregister_gpu_driver;
 
+#ifdef CONFIG_DRM_ETNAVIV_PCI_DRIVER
+	ret = etnaviv_register_pci_driver();
+	if (ret != 0)
+		goto unregister_platform_driver;
+#endif
+
 	/*
 	 * If the DT contains at least one available GPU device, instantiate
 	 * the DRM platform device.
@@ -763,7 +773,7 @@  static int __init etnaviv_init(void)
 		break;
 	}
 
-	return 0;
+	return ret;
 
 unregister_platform_driver:
 	platform_driver_unregister(&etnaviv_platform_driver);
@@ -778,6 +788,10 @@  static void __exit etnaviv_exit(void)
 	etnaviv_destroy_platform_device(&etnaviv_platform_device);
 	platform_driver_unregister(&etnaviv_platform_driver);
 	platform_driver_unregister(&etnaviv_gpu_driver);
+
+#ifdef CONFIG_DRM_ETNAVIV_PCI_DRIVER
+	etnaviv_unregister_pci_driver();
+#endif
 }
 module_exit(etnaviv_exit);
 
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.h b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
index e58f82e698de..9cd72948cfad 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
@@ -83,6 +83,9 @@  bool etnaviv_cmd_validate_one(struct etnaviv_gpu *gpu,
 	u32 *stream, unsigned int size,
 	struct drm_etnaviv_gem_submit_reloc *relocs, unsigned int reloc_size);
 
+int etnaviv_drm_bind(struct device *dev, bool component);
+void etnaviv_drm_unbind(struct device *dev, bool component);
+
 #ifdef CONFIG_DEBUG_FS
 void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv,
 	struct seq_file *m);
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index 126f0409aaed..f0eb808496e2 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -1868,8 +1868,8 @@  static int etnaviv_gpu_register_irq(struct etnaviv_gpu *gpu, int irq)
 
 /* platform independent */
 
-static int etnaviv_gpu_driver_create(struct device *dev, void __iomem *mmio,
-				     int irq, bool component, bool has_clk)
+int etnaviv_gpu_driver_create(struct device *dev, void __iomem *mmio,
+			      int irq, bool component, bool has_clk)
 {
 	struct etnaviv_gpu *gpu;
 	int err;
@@ -1917,7 +1917,7 @@  static int etnaviv_gpu_driver_create(struct device *dev, void __iomem *mmio,
 	return 0;
 }
 
-static void etnaviv_gpu_driver_destroy(struct device *dev, bool component)
+void etnaviv_gpu_driver_destroy(struct device *dev, bool component)
 {
 	if (component)
 		component_del(dev, &gpu_ops);
@@ -1968,7 +1968,7 @@  static int etnaviv_gpu_rpm_resume(struct device *dev)
 	return 0;
 }
 
-static const struct dev_pm_ops etnaviv_gpu_pm_ops = {
+const struct dev_pm_ops etnaviv_gpu_pm_ops = {
 	RUNTIME_PM_OPS(etnaviv_gpu_rpm_suspend, etnaviv_gpu_rpm_resume, NULL)
 };
 
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
index 1ec829a649b5..8d9833996ed7 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
@@ -209,6 +209,12 @@  void etnaviv_gpu_start_fe(struct etnaviv_gpu *gpu, u32 address, u16 prefetch);
 int etnaviv_gpu_bind(struct device *dev, struct device *master, void *data);
 void etnaviv_gpu_unbind(struct device *dev, struct device *master, void *data);
 
+int etnaviv_gpu_driver_create(struct device *dev, void __iomem *mmio,
+			      int irq, bool component, bool has_clk);
+
+void etnaviv_gpu_driver_destroy(struct device *dev, bool component);
+
 extern struct platform_driver etnaviv_gpu_driver;
+extern const struct dev_pm_ops etnaviv_gpu_pm_ops;
 
 #endif /* __ETNAVIV_GPU_H__ */
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_pci_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_pci_drv.c
new file mode 100644
index 000000000000..5de3e218274a
--- /dev/null
+++ b/drivers/gpu/drm/etnaviv/etnaviv_pci_drv.c
@@ -0,0 +1,75 @@ 
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/pci.h>
+
+#include "etnaviv_drv.h"
+#include "etnaviv_gpu.h"
+#include "etnaviv_pci_drv.h"
+
+static int etnaviv_pci_probe(struct pci_dev *pdev,
+			     const struct pci_device_id *ent)
+{
+	struct device *dev = &pdev->dev;
+	void __iomem *mmio;
+	int ret;
+
+	ret = pcim_enable_device(pdev);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to enable\n");
+		return ret;
+	}
+
+	pci_set_master(pdev);
+
+	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
+
+	/* Map registers, assume the PCI bar 0 contain the registers */
+	mmio = pcim_iomap(pdev, 0, 0);
+	if (IS_ERR(mmio))
+		return PTR_ERR(mmio);
+
+	ret = etnaviv_gpu_driver_create(dev, mmio, pdev->irq, false, false);
+	if (ret)
+		return ret;
+
+	return etnaviv_drm_bind(dev, false);
+}
+
+static void etnaviv_pci_remove(struct pci_dev *pdev)
+{
+	struct device *dev = &pdev->dev;
+
+	etnaviv_drm_unbind(dev, false);
+
+	etnaviv_gpu_driver_destroy(dev, false);
+
+	pci_clear_master(pdev);
+}
+
+static const struct pci_device_id etnaviv_pci_id_lists[] = {
+	{PCI_VENDOR_ID_LOONGSON, 0x7a15, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{PCI_VENDOR_ID_LOONGSON, 0x7a05, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{ }
+};
+
+static struct pci_driver etnaviv_pci_driver = {
+	.name = "etnaviv",
+	.id_table = etnaviv_pci_id_lists,
+	.probe = etnaviv_pci_probe,
+	.remove = etnaviv_pci_remove,
+	.driver.pm = pm_ptr(&etnaviv_gpu_pm_ops),
+};
+
+int etnaviv_register_pci_driver(void)
+{
+	return pci_register_driver(&etnaviv_pci_driver);
+}
+
+void etnaviv_unregister_pci_driver(void)
+{
+	pci_unregister_driver(&etnaviv_pci_driver);
+}
+
+MODULE_DEVICE_TABLE(pci, etnaviv_pci_id_lists);
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_pci_drv.h b/drivers/gpu/drm/etnaviv/etnaviv_pci_drv.h
new file mode 100644
index 000000000000..25d07bdd2ea0
--- /dev/null
+++ b/drivers/gpu/drm/etnaviv/etnaviv_pci_drv.h
@@ -0,0 +1,9 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ETNAVIV_PCI_DRV_H__
+#define __ETNAVIV_PCI_DRV_H__
+
+int etnaviv_register_pci_driver(void);
+void etnaviv_unregister_pci_driver(void);
+
+#endif