[v3,5/6] drm/etnaviv: expand driver support for the pci devices

diff --git a/drivers/gpu/drm/etnaviv/Makefile b/drivers/gpu/drm/etnaviv/Makefile
index 46e5ffad69a6..3f8b99664a58 100644
--- a/drivers/gpu/drm/etnaviv/Makefile
+++ b/drivers/gpu/drm/etnaviv/Makefile
@@ -13,6 +13,7 @@  etnaviv-y := \
 	etnaviv_iommu_v2.o \
 	etnaviv_iommu.o \
 	etnaviv_mmu.o \
+	etnaviv_pci_drv.o \
 	etnaviv_perfmon.o \
 	etnaviv_sched.o
 
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
index 93dfa4b1a38b..dbca3bf7fba2 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
@@ -7,6 +7,7 @@ 
 #include <linux/dma-mapping.h>
 #include <linux/module.h>
 #include <linux/of_platform.h>
+#include <linux/pci.h>
 #include <linux/uaccess.h>
 
 #include <drm/drm_debugfs.h>
@@ -21,6 +22,7 @@ 
 #include "etnaviv_gpu.h"
 #include "etnaviv_gem.h"
 #include "etnaviv_mmu.h"
+#include "etnaviv_pci_drv.h"
 #include "etnaviv_perfmon.h"
 #include "common.xml.h"
 
@@ -566,6 +568,16 @@  static int etnaviv_alloc_private(struct device *dev,
 		return ret;
 	}
 
+	/*
+	 * Loongson Mips and LoongArch CPU(ls3a5000, ls3c5000, ls2k1000la)
+	 * maintain cache coherency by hardware
+	 */
+	if (IS_ENABLED(CONFIG_CPU_LOONGSON64) || IS_ENABLED(CONFIG_LOONGARCH))
+		priv->has_cached_coherent = true;
+
+	dev_info(dev, "Cached coherent mode is %s\n",
+		 priv->has_cached_coherent ? "support" : "not support");
+
 	*ppriv = priv;
 
 	return 0;
@@ -580,10 +592,9 @@  static void etnaviv_free_private(struct etnaviv_drm_private *priv)
 	kfree(priv);
 }
 
-/*
- * Platform driver:
- */
-static int etnaviv_bind(struct device *dev)
+static struct etnaviv_drm_private *etna_private_s;
+
+int etnaviv_drm_bind(struct device *dev, bool component)
 {
 	struct etnaviv_drm_private *priv;
 	struct drm_device *drm;
@@ -599,12 +610,15 @@  static int etnaviv_bind(struct device *dev)
 
 	priv->drm = drm;
 	drm->dev_private = priv;
+	etna_private_s = priv;
 
 	dma_set_max_seg_size(dev, SZ_2G);
 
-	dev_set_drvdata(dev, drm);
+	if (component)
+		ret = component_bind_all(dev, drm);
+	else
+		ret = etnaviv_gpu_bind(dev, NULL, drm);
 
-	ret = component_bind_all(dev, drm);
 	if (ret < 0)
 		goto out_free_priv;
 
@@ -626,14 +640,17 @@  static int etnaviv_bind(struct device *dev)
 	return ret;
 }
 
-static void etnaviv_unbind(struct device *dev)
+void etnaviv_drm_unbind(struct device *dev, bool component)
 {
-	struct drm_device *drm = dev_get_drvdata(dev);
-	struct etnaviv_drm_private *priv = drm->dev_private;
+	struct etnaviv_drm_private *priv = etna_private_s;
+	struct drm_device *drm = priv->drm;
 
 	drm_dev_unregister(drm);
 
-	component_unbind_all(dev, drm);
+	if (component)
+		component_unbind_all(dev, drm);
+	else
+		etnaviv_gpu_unbind(dev, NULL, drm);
 
 	etnaviv_free_private(priv);
 
@@ -642,9 +659,22 @@  static void etnaviv_unbind(struct device *dev)
 	drm_dev_put(drm);
 }
 
+/*
+ * Platform driver:
+ */
+static int etnaviv_master_bind(struct device *dev)
+{
+	return etnaviv_drm_bind(dev, true);
+}
+
+static void etnaviv_master_unbind(struct device *dev)
+{
+	return etnaviv_drm_unbind(dev, true);
+}
+
 static const struct component_master_ops etnaviv_master_ops = {
-	.bind = etnaviv_bind,
-	.unbind = etnaviv_unbind,
+	.bind = etnaviv_master_bind,
+	.unbind = etnaviv_master_unbind,
 };
 
 static int etnaviv_pdev_probe(struct platform_device *pdev)
@@ -764,10 +794,14 @@  static int __init etnaviv_init(void)
 	if (ret != 0)
 		return ret;
 
-	ret = platform_driver_register(&etnaviv_platform_driver);
+	ret = pci_register_driver(&etnaviv_pci_driver);
 	if (ret != 0)
 		goto unregister_gpu_driver;
 
+	ret = platform_driver_register(&etnaviv_platform_driver);
+	if (ret != 0)
+		goto unregister_pci_driver;
+
 	/*
 	 * If the DT contains at least one available GPU device, instantiate
 	 * the DRM platform device.
@@ -789,6 +823,8 @@  static int __init etnaviv_init(void)
 
 unregister_platform_driver:
 	platform_driver_unregister(&etnaviv_platform_driver);
+unregister_pci_driver:
+	pci_unregister_driver(&etnaviv_pci_driver);
 unregister_gpu_driver:
 	platform_driver_unregister(&etnaviv_gpu_driver);
 	return ret;
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.h b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
index 87fb52c03c5e..934fc3744389 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
@@ -86,6 +86,9 @@  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 4937580551a5..700f2414b87d 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -1565,10 +1565,11 @@  static irqreturn_t irq_handler(int irq, void *data)
 	return ret;
 }
 
-static int etnaviv_gpu_clk_get(struct etnaviv_gpu *gpu)
+static int etnaviv_gpu_clk_get(struct etnaviv_gpu *gpu, bool no_clk)
 {
 	struct device *dev = gpu->dev;
 
+	gpu->no_clk = no_clk;
 	if (gpu->no_clk)
 		return 0;
 
@@ -1746,8 +1747,7 @@  static const struct thermal_cooling_device_ops cooling_ops = {
 	.set_cur_state = etnaviv_gpu_cooling_set_cur_state,
 };
 
-static int etnaviv_gpu_bind(struct device *dev, struct device *master,
-	void *data)
+int etnaviv_gpu_bind(struct device *dev, struct device *master, void *data)
 {
 	struct drm_device *drm = data;
 	struct etnaviv_drm_private *priv = drm->dev_private;
@@ -1778,7 +1778,6 @@  static int etnaviv_gpu_bind(struct device *dev, struct device *master,
 	if (ret < 0)
 		goto out_sched;
 
-
 	gpu->drm = drm;
 	gpu->fence_context = dma_fence_context_alloc(1);
 	xa_init_flags(&gpu->user_fences, XA_FLAGS_ALLOC);
@@ -1807,8 +1806,7 @@  static int etnaviv_gpu_bind(struct device *dev, struct device *master,
 	return ret;
 }
 
-static void etnaviv_gpu_unbind(struct device *dev, struct device *master,
-	void *data)
+void etnaviv_gpu_unbind(struct device *dev, struct device *master, void *data)
 {
 	struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
 
@@ -1878,9 +1876,37 @@  static int etnaviv_gpu_register_irq(struct etnaviv_gpu *gpu, int irq)
 	return 0;
 }
 
-static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
+static int etnaviv_gpu_plat_drv_init(struct etnaviv_gpu *gpu, bool component)
+{
+	struct device *dev = gpu->dev;
+	struct platform_device *pdev = to_platform_device(dev);
+	int err;
+
+	/* Map registers: */
+	gpu->mmio = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(gpu->mmio))
+		return PTR_ERR(gpu->mmio);
+
+	if (component) {
+		err = component_add(dev, &gpu_ops);
+		if (err < 0) {
+			dev_err(dev, "failed to register component: %d\n", err);
+			return err;
+		}
+	}
+
+	return 0;
+}
+
+static void etnaviv_gpu_plat_drv_fini(struct etnaviv_gpu *gpu, bool component)
+{
+	if (component)
+		component_del(gpu->dev, &gpu_ops);
+}
+
+int etnaviv_gpu_driver_create(struct device *dev, int irq, bool component,
+			      bool no_clk, pfn_gpu_init_t gpu_post_init)
 {
-	struct device *dev = &pdev->dev;
 	struct etnaviv_gpu *gpu;
 	int err;
 
@@ -1888,22 +1914,16 @@  static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
 	if (!gpu)
 		return -ENOMEM;
 
-	gpu->dev = &pdev->dev;
+	gpu->dev = dev;
 	mutex_init(&gpu->lock);
 	mutex_init(&gpu->sched_lock);
 
-	/* Map registers: */
-	gpu->mmio = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(gpu->mmio))
-		return PTR_ERR(gpu->mmio);
-
 	/* Get Interrupt: */
-	err = etnaviv_gpu_register_irq(gpu,  platform_get_irq(pdev, 0));
+	err = etnaviv_gpu_register_irq(gpu, irq);
 	if (err)
 		return err;
 
-	/* Get Clocks: */
-	err = etnaviv_gpu_clk_get(gpu);
+	err = etnaviv_gpu_clk_get(gpu, no_clk);
 	if (err)
 		return err;
 
@@ -1915,23 +1935,44 @@  static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
 	 * autosuspend delay is rather arbitary: no measurements have
 	 * yet been performed to determine an appropriate value.
 	 */
-	pm_runtime_use_autosuspend(gpu->dev);
-	pm_runtime_set_autosuspend_delay(gpu->dev, 200);
-	pm_runtime_enable(gpu->dev);
+	pm_runtime_use_autosuspend(dev);
+	pm_runtime_set_autosuspend_delay(dev, 200);
+	pm_runtime_enable(dev);
 
-	err = component_add(&pdev->dev, &gpu_ops);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to register component: %d\n", err);
-		return err;
-	}
+	gpu_post_init(gpu, component);
 
 	return 0;
 }
 
+void etnaviv_gpu_driver_destroy(struct device *dev, bool component,
+				pfn_gpu_fini_t gpu_early_fini)
+{
+	struct etnaviv_gpu *gpu = dev_get_drvdata(dev);
+
+	if (!gpu) {
+		dev_err(dev, "device not initialized properly\n");
+		return;
+	}
+
+	gpu_early_fini(gpu, component);
+
+	pm_runtime_disable(dev);
+}
+
+static int etnaviv_gpu_platform_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	int irq = platform_get_irq(pdev, 0);
+
+	return etnaviv_gpu_driver_create(dev, irq, true, false, etnaviv_gpu_plat_drv_init);
+}
+
 static int etnaviv_gpu_platform_remove(struct platform_device *pdev)
 {
-	component_del(&pdev->dev, &gpu_ops);
-	pm_runtime_disable(&pdev->dev);
+	struct device *dev = &pdev->dev;
+
+	etnaviv_gpu_driver_destroy(dev, true, etnaviv_gpu_plat_drv_fini);
+
 	return 0;
 }
 
@@ -1978,7 +2019,7 @@  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 6da5209a7d64..cfcdc5dde9d9 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
@@ -207,6 +207,18 @@  void etnaviv_gpu_pm_put(struct etnaviv_gpu *gpu);
 int etnaviv_gpu_wait_idle(struct etnaviv_gpu *gpu, unsigned int timeout_ms);
 void etnaviv_gpu_start_fe(struct etnaviv_gpu *gpu, u32 address, u16 prefetch);
 
+typedef int (*pfn_gpu_init_t)(struct etnaviv_gpu *gpu, bool component);
+typedef void (*pfn_gpu_fini_t)(struct etnaviv_gpu *gpu, bool component);
+
+int etnaviv_gpu_driver_create(struct device *dev, int irq, bool component,
+			      bool no_clk, pfn_gpu_init_t post_init);
+void etnaviv_gpu_driver_destroy(struct device *dev, bool component,
+				pfn_gpu_fini_t early_fini);
+
+int etnaviv_gpu_bind(struct device *dev, struct device *master, void *data);
+void etnaviv_gpu_unbind(struct device *dev, struct device *master, void *data);
+
 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..e64a03061d09
--- /dev/null
+++ b/drivers/gpu/drm/etnaviv/etnaviv_pci_drv.c
@@ -0,0 +1,88 @@ 
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/pci.h>
+
+#include "etnaviv_drv.h"
+#include "etnaviv_gpu.h"
+#include "etnaviv_pci_drv.h"
+
+enum etnaviv_pci_gpu_family {
+	GC1000_IN_LS7A1000 = 0,
+	GC1000_IN_LS2K1000 = 1,
+};
+
+static int etnaviv_gpu_pci_init(struct etnaviv_gpu *gpu, bool component)
+{
+	struct pci_dev *pdev = to_pci_dev(gpu->dev);
+
+	/* Map registers, assume the PCI bar 0 contain the registers */
+	gpu->mmio = pcim_iomap(pdev, 0, 0);
+	if (IS_ERR(gpu->mmio))
+		return PTR_ERR(gpu->mmio);
+
+	gpu->no_clk = true;
+
+	return 0;
+}
+
+static void etnaviv_gpu_pci_fini(struct etnaviv_gpu *gpu, bool component)
+{
+	struct pci_dev *pdev = to_pci_dev(gpu->dev);
+
+	pci_clear_master(pdev);
+
+	dev_dbg(gpu->dev, "component is %s\n",
+		component ? "enabled" : "disabled");
+}
+
+static int etnaviv_pci_probe(struct pci_dev *pdev,
+			     const struct pci_device_id *ent)
+{
+	struct device *dev = &pdev->dev;
+	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(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret)
+		return ret;
+
+	/* Create a GPU driver instance for the PCI device itself */
+	ret = etnaviv_gpu_driver_create(dev, pdev->irq, false, true,
+					etnaviv_gpu_pci_init);
+	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, etnaviv_gpu_pci_fini);
+}
+
+static const struct pci_device_id etnaviv_pci_id_lists[] = {
+	{0x0014, 0x7a15, PCI_ANY_ID, PCI_ANY_ID, 0, 0, GC1000_IN_LS7A1000},
+	{0x0014, 0x7a05, PCI_ANY_ID, PCI_ANY_ID, 0, 0, GC1000_IN_LS2K1000},
+	{0, 0, 0, 0, 0, 0, 0}
+};
+
+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),
+};
+
+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..6e50ec5f32b7
--- /dev/null
+++ b/drivers/gpu/drm/etnaviv/etnaviv_pci_drv.h
@@ -0,0 +1,10 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __ETNAVIV_PCI_DRV_H__
+#define __ETNAVIV_PCI_DRV_H__
+
+#include <linux/pci.h>
+
+extern struct pci_driver etnaviv_pci_driver;
+
+#endif