linux-kernel - [PATCH 2/3] nouveau: Attempt to use platform-provided ROM image

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Message-Id: <1364333156-4530-2-git-send-email-matthew.garrett@nebula.com>
Date:	Tue, 26 Mar 2013 17:25:55 -0400
From:	Matthew Garrett <matthew.garrett@...ula.com>
To:	airlied@...il.com
Cc:	alexander.deucher@....com, skeggsb@...il.com,
	linux-kernel@...r.kernel.org, seth.forshee@...onical.com,
	bhelgaas@...gle.com, grawity@...il.com,
	torvalds@...ux-foundation.org,
	Matthew Garrett <matthew.garrett@...ula.com>
Subject: [PATCH 2/3] nouveau: Attempt to use platform-provided ROM image

Some platforms only provide their PCI ROM via a platform-specific interface.
Fall back to attempting that if all other sources fail.

Signed-off-by: Matthew Garrett <matthew.garrett@...ula.com>
---
 drivers/gpu/drm/nouveau/core/subdev/bios/base.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/core/subdev/bios/base.c b/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
index e816f06..0e2c1a4 100644
--- a/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
+++ b/drivers/gpu/drm/nouveau/core/subdev/bios/base.c
@@ -248,6 +248,22 @@ nouveau_bios_shadow_pci(struct nouveau_bios *bios)
 	}
 }
 
+static void
+nouveau_bios_shadow_platform(struct nouveau_bios *bios)
+{
+	struct pci_dev *pdev = nv_device(bios)->pdev;
+	size_t size;
+
+	void __iomem *rom = pci_platform_rom(pdev, &size);
+	if (rom && size) {
+		bios->data = kmalloc(size, GFP_KERNEL);
+		if (bios->data) {
+			memcpy_fromio(bios->data, rom, size);
+			bios->size = size;
+		}
+	}
+}
+
 static int
 nouveau_bios_score(struct nouveau_bios *bios, const bool writeable)
 {
@@ -288,6 +304,7 @@ nouveau_bios_shadow(struct nouveau_bios *bios)
 		{ "PROM", nouveau_bios_shadow_prom, false, 0, 0, NULL },
 		{ "ACPI", nouveau_bios_shadow_acpi, true, 0, 0, NULL },
 		{ "PCIROM", nouveau_bios_shadow_pci, true, 0, 0, NULL },
+		{ "PLATFORM", nouveau_bios_shadow_platform, true, 0, 0, NULL },
 		{}
 	};
 	struct methods *mthd, *best;
-- 
1.8.1.2

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