[Intel-gfx] [PATCH 4/5] drm/i915/gvt: use normal mmio read function for firmware exposure

[Zhenyu Wang]

As now gvt init is late after MMIO initialization, use normal MMIO
read function for initial firmware exposure if no available firmware
loaded.

Signed-off-by: Zhenyu Wang <zhenyuw at linux.intel.com>
---
 drivers/gpu/drm/i915/gvt/firmware.c | 47 ++++---------------------------------
 1 file changed, 4 insertions(+), 43 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/firmware.c b/drivers/gpu/drm/i915/gvt/firmware.c
index 2fae2a2ca96f..1cb29b2d7dc6 100644
--- a/drivers/gpu/drm/i915/gvt/firmware.c
+++ b/drivers/gpu/drm/i915/gvt/firmware.c
@@ -48,31 +48,6 @@ struct gvt_firmware_header {
 	unsigned char data[1];
 };
 
-#define RD(offset) (readl(mmio + offset.reg))
-#define WR(v, offset) (writel(v, mmio + offset.reg))
-
-static void bdw_forcewake_get(void __iomem *mmio)
-{
-	WR(_MASKED_BIT_DISABLE(0xffff), FORCEWAKE_MT);
-
-	RD(ECOBUS);
-
-	if (wait_for((RD(FORCEWAKE_ACK_HSW) & FORCEWAKE_KERNEL) == 0, 50))
-		gvt_err("fail to wait forcewake idle\n");
-
-	WR(_MASKED_BIT_ENABLE(FORCEWAKE_KERNEL), FORCEWAKE_MT);
-
-	if (wait_for((RD(FORCEWAKE_ACK_HSW) & FORCEWAKE_KERNEL), 50))
-		gvt_err("fail to wait forcewake ack\n");
-
-	if (wait_for((RD(GEN6_GT_THREAD_STATUS_REG) &
-		      GEN6_GT_THREAD_STATUS_CORE_MASK) == 0, 50))
-		gvt_err("fail to wait c0 wake up\n");
-}
-
-#undef RD
-#undef WR
-
 #define dev_to_drm_minor(d) dev_get_drvdata((d))
 
 static ssize_t
@@ -91,9 +66,9 @@ static struct bin_attribute firmware_attr = {
 	.mmap = NULL,
 };
 
-static int expose_firmware_sysfs(struct intel_gvt *gvt,
-					void __iomem *mmio)
+static int expose_firmware_sysfs(struct intel_gvt *gvt)
 {
+	struct drm_i915_private *dev_priv = gvt->dev_priv;
 	struct intel_gvt_device_info *info = &gvt->device_info;
 	struct pci_dev *pdev = gvt->dev_priv->drm.pdev;
 	struct intel_gvt_mmio_info *e;
@@ -132,7 +107,7 @@ static int expose_firmware_sysfs(struct intel_gvt *gvt,
 
 		for (j = 0; j < e->length; j += 4)
 			*(u32 *)(p + e->offset + j) =
-				readl(mmio + e->offset + j);
+				I915_READ_NOTRACE(_MMIO(e->offset + j));
 	}
 
 	memcpy(gvt->firmware.mmio, p, info->mmio_size);
@@ -235,7 +210,6 @@ int intel_gvt_load_firmware(struct intel_gvt *gvt)
 	struct gvt_firmware_header *h;
 	const struct firmware *fw;
 	char *path;
-	void __iomem *mmio;
 	void *mem;
 	int ret;
 
@@ -260,17 +234,6 @@ int intel_gvt_load_firmware(struct intel_gvt *gvt)
 
 	firmware->mmio = mem;
 
-	mmio = pci_iomap(pdev, info->mmio_bar, info->mmio_size);
-	if (!mmio) {
-		kfree(path);
-		kfree(firmware->cfg_space);
-		kfree(firmware->mmio);
-		return -EINVAL;
-	}
-
-	if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv))
-		bdw_forcewake_get(mmio);
-
 	sprintf(path, "%s/vid_0x%04x_did_0x%04x_rid_0x%04x.golden_hw_state",
 		 GVT_FIRMWARE_PATH, pdev->vendor, pdev->device,
 		 pdev->revision);
@@ -300,13 +263,11 @@ int intel_gvt_load_firmware(struct intel_gvt *gvt)
 
 	release_firmware(fw);
 	firmware->firmware_loaded = true;
-	pci_iounmap(pdev, mmio);
 	return 0;
 
 out_free_fw:
 	release_firmware(fw);
 expose_firmware:
-	expose_firmware_sysfs(gvt, mmio);
-	pci_iounmap(pdev, mmio);
+	expose_firmware_sysfs(gvt);
 	return 0;
 }
-- 
2.11.0