From 3a47132af4dfab420e3c35d7d100dd93fb7bf9c6 Mon Sep 17 00:00:00 2001
From: Ian Romanick <idr@us.ibm.com>
Date: Thu, 1 Feb 2007 13:30:34 -0800
Subject: Refactor memory map / unmap functions.

MGAMapMem and MGAMapMemFBDev were refactored into a single function.
This happens to fix a bug triggered in software XAA paths because
MGAMapMem did not set FbStart.  MGAUnmapMem and MGAUnmapMemFBDev were
also refactored into a single function.
---
 src/mga_driver.c | 120 +++++++++++++++++++++----------------------------------
 1 file changed, 46 insertions(+), 74 deletions(-)

(limited to 'src')

diff --git a/src/mga_driver.c b/src/mga_driver.c
index 48dee81..1a72e76 100644
--- a/src/mga_driver.c
+++ b/src/mga_driver.c
@@ -2391,73 +2391,66 @@ static Bool
 MGAMapMem(ScrnInfoPtr pScrn)
 {
     MGAPtr pMga = MGAPTR(pScrn);
-    struct pci_device * const dev = pMga->PciInfo;
+    struct pci_device *const dev = pMga->PciInfo;
     int err;
 
 
-    err = pci_device_map_region(dev, 0, TRUE);
-    if (err) {
-	return FALSE;
-    }
-
-    err = pci_device_map_region(dev, 1, TRUE);
-    if (err) {
-	return FALSE;
-    }
-
-    pMga->IOBase = dev->regions[ pMga->io_bar ].memory;
-    pMga->FbBase = dev->regions[ pMga->framebuffer_bar ].memory;
-    pMga->ILOADBase = NULL;
+    if (!pMga->FBDev) {
+	err = pci_device_map_region(dev, 0, TRUE);
+	if (err) {
+	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+		       "Unable to map BAR 0.  %s (%d)\n",
+		       strerror(err), err);
+	    return FALSE;
+	}
 
-    if (pMga->iload_bar != -1) {
-	err = pci_device_map_region(dev, 2, TRUE);
+	err = pci_device_map_region(dev, 1, TRUE);
 	if (err) {
+	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+		       "Unable to map BAR 1.  %s (%d)\n",
+		       strerror(err), err);
 	    return FALSE;
 	}
 
-	pMga->ILOADBase = dev->regions[ pMga->iload_bar ].memory;
+	pMga->IOBase = dev->regions[ pMga->io_bar ].memory;
+	pMga->FbBase = dev->regions[ pMga->framebuffer_bar ].memory;
     }
-	
-
-    return TRUE;
-}
-
-static Bool
-MGAMapMemFBDev(ScrnInfoPtr pScrn)
-{
-    MGAPtr pMga = MGAPTR(pScrn);
-    struct pci_device * const dev = pMga->PciInfo;
-    int err;
-
+    else {
+	pMga->FbBase = fbdevHWMapVidmem(pScrn);
+	if (pMga->FbBase == NULL) {
+	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+		       "Unable to map framebuffer.\n");
+	    return FALSE;
+	}
 
-    pMga->FbBase = fbdevHWMapVidmem(pScrn);
-    if (pMga->FbBase == NULL)
-	return FALSE;
+	pMga->IOBase = fbdevHWMapMMIO(pScrn);
+	if (pMga->IOBase == NULL) {
+	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "Unable to map MMIO.\n");
+	    return FALSE;
+	}
+    }
 
-    pMga->IOBase = fbdevHWMapMMIO(pScrn);
-    if (pMga->IOBase == NULL)
-	return FALSE;
 
     pMga->FbStart = pMga->FbBase + pMga->YDstOrg * (pScrn->bitsPerPixel / 8);
 
-    /* Can't ask matroxfb for a mapping of the ILOAD window.
-     */
-
     pMga->ILOADBase = NULL;
     if (pMga->iload_bar != -1) {
-	err = pci_device_map_region(dev, 2, TRUE);
+	err = pci_device_map_region(dev, pMga->iload_bar, TRUE);
 	if (err) {
+	    xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+		       "Unable to map BAR 2 (ILOAD region).  %s (%d)\n",
+		       strerror(err), err);
 	    return FALSE;
 	}
 
-	pMga->ILOADBase = dev->regions[ pMga->iload_bar ].memory;
+	pMga->ILOADBase = dev->regions[pMga->iload_bar].memory;
     }
+	
 
     return TRUE;
 }
 
 
-
 /*
  * Unmap the framebuffer and MMIO memory.
  */
@@ -2470,45 +2463,29 @@ MGAUnmapMem(ScrnInfoPtr pScrn)
     unsigned i;
 
     
-    for (i = 0 ; i < 6 ; i++) {
-	if (dev->regions[i].memory != NULL) {
-	    pci_device_unmap_region(dev, i);
-	}
+    if (!pMga->FBDev) {
+	pci_device_unmap_region(dev, 0);
+	pci_device_unmap_region(dev, 1);
+    }
+    else {
+	fbdevHWUnmapVidmem(pScrn);
+	fbdevHWUnmapMMIO(pScrn);
     }
-
-    pMga->IOBase = NULL;
-    pMga->FbBase = NULL;
-    pMga->FbStart = NULL;
-    pMga->ILOADBase = NULL;
-
-    return TRUE;
-}
-
-static Bool
-MGAUnmapMemFBDev(ScrnInfoPtr pScrn)
-{
-    MGAPtr pMga = MGAPTR(pScrn);
-    struct pci_device * const dev = pMga->PciInfo;
-
-    fbdevHWUnmapVidmem(pScrn);
-    fbdevHWUnmapMMIO(pScrn);
 
     if ((pMga->iload_bar != -1)
-	 && (dev->regions[ pMga->iload_bar ].memory != NULL)) {
+	 && (dev->regions[pMga->iload_bar].memory != NULL)) {
 	pci_device_unmap_region(dev, pMga->iload_bar);
     }
 
+    pMga->IOBase = NULL;
     pMga->FbBase = NULL;
     pMga->FbStart = NULL;
-    pMga->IOBase = NULL;
     pMga->ILOADBase = NULL;
 
     return TRUE;
 }
 
 
-
-
 /*
  * This function saves the video state.
  */
@@ -2982,13 +2959,8 @@ MGAScreenInit(int scrnIndex, ScreenPtr pScreen, int argc, char **argv)
     }
     
     /* Map the MGA memory and MMIO areas */
-    if (pMga->FBDev) {
-	if (!MGAMapMemFBDev(pScrn))
-	    return FALSE;
-    } else {
-	if (!MGAMapMem(pScrn))
-	    return FALSE;
-    }
+    if (!MGAMapMem(pScrn))
+	return FALSE;
     
     if ((pMga->Chipset == PCI_CHIP_MGAG100)
 	|| (pMga->Chipset == PCI_CHIP_MGAG100_PCI))
@@ -3741,7 +3713,7 @@ MGACloseScreen(int scrnIndex, ScreenPtr pScreen)
     if (pScrn->vtSema) {
 	if (pMga->FBDev) {
 	    fbdevHWRestore(pScrn);
-	    MGAUnmapMemFBDev(pScrn);
+	    MGAUnmapMem(pScrn);
         } else {
 	    MGARestore(pScrn);
 	    vgaHWLock(hwp);
-- 
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