[Intel-xe] [PATCH 12/12] drm/xe: Don't "peek" into GMD_ID

[Michał Winiarski]

Now that MMIO init got moved to device early, we can use regular
xe_mmio_read helpers to get to GMD_ID register.

Signed-off-by: Michał Winiarski <michal.winiarski at intel.com>
---
 drivers/gpu/drm/xe/regs/xe_gt_regs.h |  1 +
 drivers/gpu/drm/xe/xe_pci.c          | 35 ++++++++--------------------
 2 files changed, 11 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/xe/regs/xe_gt_regs.h b/drivers/gpu/drm/xe/regs/xe_gt_regs.h
index 902c60543de07..aedfa139678d7 100644
--- a/drivers/gpu/drm/xe/regs/xe_gt_regs.h
+++ b/drivers/gpu/drm/xe/regs/xe_gt_regs.h
@@ -38,6 +38,7 @@
 #define   GMD_ID_ARCH_MASK			REG_GENMASK(31, 22)
 #define   GMD_ID_RELEASE_MASK			REG_GENMASK(21, 14)
 #define   GMD_ID_REVID				REG_GENMASK(5, 0)
+#define MEDIA_GMD_ID				XE_REG(GMD_ID.addr + MEDIA_GT_GSI_OFFSET)
 
 #define FORCEWAKE_ACK_GSC			XE_REG(0xdf8)
 #define FORCEWAKE_ACK_GT_MTL			XE_REG(0xdfc)
diff --git a/drivers/gpu/drm/xe/xe_pci.c b/drivers/gpu/drm/xe/xe_pci.c
index 2f04f07dc17a4..4356c8f4f7c23 100644
--- a/drivers/gpu/drm/xe/xe_pci.c
+++ b/drivers/gpu/drm/xe/xe_pci.c
@@ -21,6 +21,7 @@
 #include "xe_drv.h"
 #include "xe_gt.h"
 #include "xe_macros.h"
+#include "xe_mmio.h"
 #include "xe_module.h"
 #include "xe_pci_types.h"
 #include "xe_pm.h"
@@ -440,29 +441,6 @@ find_subplatform(const struct xe_device *xe, const struct xe_device_desc *desc)
 	return NULL;
 }
 
-static void peek_gmdid(struct xe_device *xe, u32 gmdid_offset, u32 *ver, u32 *revid)
-{
-	struct pci_dev *pdev = to_pci_dev(xe->drm.dev);
-	void __iomem *map = pci_iomap_range(pdev, 0, gmdid_offset, sizeof(u32));
-	u32 val;
-
-	if (!map) {
-		drm_err(&xe->drm, "Failed to read GMD_ID (%#x) from PCI BAR.\n",
-			gmdid_offset);
-		*ver = 0;
-		*revid = 0;
-
-		return;
-	}
-
-	val = ioread32(map);
-	pci_iounmap(pdev, map);
-
-	*ver = REG_FIELD_GET(GMD_ID_ARCH_MASK, val) * 100 +
-		REG_FIELD_GET(GMD_ID_RELEASE_MASK, val);
-	*revid = REG_FIELD_GET(GMD_ID_REVID, val);
-}
-
 /*
  * Pre-GMD_ID platform: device descriptor already points to the appropriate
  * graphics descriptor. Simply forward the description and calculate the version
@@ -494,9 +472,14 @@ static void handle_gmdid(struct xe_device *xe,
 			 u32 *graphics_revid,
 			 u32 *media_revid)
 {
+	struct xe_gt *gt = xe_root_mmio_gt(xe);
+	u32 val;
 	u32 ver;
 
-	peek_gmdid(xe, GMD_ID.addr, &ver, graphics_revid);
+	val = xe_mmio_read32(gt, GMD_ID);
+	ver = REG_FIELD_GET(GMD_ID_ARCH_MASK, val) * 100 + REG_FIELD_GET(GMD_ID_RELEASE_MASK, val);
+	*graphics_revid = REG_FIELD_GET(GMD_ID_REVID, val);
+
 	for (int i = 0; i < ARRAY_SIZE(graphics_ip_map); i++) {
 		if (ver == graphics_ip_map[i].ver) {
 			xe->info.graphics_verx100 = ver;
@@ -511,7 +494,9 @@ static void handle_gmdid(struct xe_device *xe,
 			ver / 100, ver % 100);
 	}
 
-	peek_gmdid(xe, GMD_ID.addr + 0x380000, &ver, media_revid);
+	val = xe_mmio_read32(gt, MEDIA_GMD_ID);
+	ver = REG_FIELD_GET(GMD_ID_ARCH_MASK, val) * 100 + REG_FIELD_GET(GMD_ID_RELEASE_MASK, val);
+	*media_revid = REG_FIELD_GET(GMD_ID_REVID, val);
 
 	/* Media may legitimately be fused off / not present */
 	if (ver == 0)
-- 
2.42.0