[apriyadarshi] 71650: fixed portCount boundary problem :D

Author: apriyadarshi
Date: Thu Jun 16 21:14:03 2016
New Revision: 71650

URL: http://svn.reactos.org/svn/reactos?rev=71650&view=rev
Log:
fixed portCount boundary problem :D

Modified:
    branches/GSoC_2016/AHCI/drivers/storage/storahci/storahci.c
    branches/GSoC_2016/AHCI/drivers/storage/storahci/storahci.h

Modified: branches/GSoC_2016/AHCI/drivers/storage/storahci/storahci.c
URL:
http://svn.reactos.org/svn/reactos/branches/GSoC_2016/AHCI/drivers/storage/…
==============================================================================
--- branches/GSoC_2016/AHCI/drivers/storage/storahci/storahci.c	[iso-8859-1] (original)
+++ branches/GSoC_2016/AHCI/drivers/storage/storahci/storahci.c	[iso-8859-1] Thu Jun 16
21:14:03 2016
@@ -35,7 +35,7 @@
     portNumber = PortExtension->PortNumber;
 
     NT_ASSERT(abar != NULL);
-    NT_ASSERT(portNumber < MAXIMUM_AHCI_PORT_COUNT);
+    NT_ASSERT(portNumber < adapterExtension->PortCount);
 
     PortExtension->Port = &abar->PortList[portNumber];
 
@@ -120,18 +120,15 @@
     portCount = 0;
     portImplemented = AdapterExtension->PortImplemented;
 
-    // make sure we don't allocate too much memory for the ports we have not
implemented
-    // LOGIC: AND with all MAXIMUM_AHCI_PORT_COUNT (low significant) bits set
-    portImplemented = portImplemented & ((1 << MAXIMUM_AHCI_PORT_COUNT) - 1);
-    while (portImplemented > 0)
-    {
-        portCount++;
-        portImplemented &= (portImplemented - 1);
-    }
-
-    NT_ASSERT(portCount <= MAXIMUM_AHCI_PORT_COUNT);
+    NT_ASSERT(portImplemented != 0);
+    for (index = MAXIMUM_AHCI_PORT_COUNT - 1; index > 0; index--)
+        if ((portImplemented & (1 << index)) != 0)
+            break;
+
+    portCount = index + 1;
     DebugPrint("\tPort Count: %d\n", portCount);
 
+    AdapterExtension->PortCount = portCount;
     nonCachedExtensionSize =    sizeof(AHCI_COMMAND_HEADER) * AlignedNCS + //should be 1K
aligned
                                 sizeof(AHCI_RECEIVED_FIS);
 
@@ -151,7 +148,7 @@
     nonCachedExtension = AdapterExtension->NonCachedExtension;
     AhciZeroMemory(nonCachedExtension, nonCachedExtensionSize * portCount);
 
-    for (index = 0; index < MAXIMUM_AHCI_PORT_COUNT; index++)
+    for (index = 0; index < portCount; index++)
     {
         AdapterExtension->PortExtension[index].IsActive = FALSE;
         if ((AdapterExtension->PortImplemented & (1 << index)) != 0)
@@ -298,7 +295,7 @@
  *
  * The Storport driver calls the HwStorInterrupt routine after the HBA generates an
interrupt request.
  *
- * @param adapterExtension
+ * @param AdapterExtension
  *
  * @return
  * return TRUE Indicates that an interrupt was pending on adapter.
@@ -306,48 +303,46 @@
  */
 BOOLEAN
 AhciHwInterrupt(
-    __in PVOID AdapterExtension
-    )
-{
-    ULONG portPending, nextPort, i;
-    PAHCI_ADAPTER_EXTENSION adapterExtension;
+    __in PAHCI_ADAPTER_EXTENSION AdapterExtension
+    )
+{
+    ULONG portPending, nextPort, i, portCount;
 
     DebugPrint("AhciHwInterrupt()\n");
 
-    adapterExtension = AdapterExtension;
-
-    if (adapterExtension->StateFlags.Removed)
+    if (AdapterExtension->StateFlags.Removed)
     {
         return FALSE;
     }
 
-    portPending = StorPortReadRegisterUlong(adapterExtension, adapterExtension->IS);
+    portPending = StorPortReadRegisterUlong(AdapterExtension, AdapterExtension->IS);
     // we process interrupt for implemented ports only
-    portPending = portPending & adapterExtension->PortImplemented;
+    portCount = AdapterExtension->PortCount;
+    portPending = portPending & AdapterExtension->PortImplemented;
 
     if (portPending == 0)
     {
         return FALSE;
     }
 
-    for (i = 1; i <= MAXIMUM_AHCI_PORT_COUNT; i++)
-    {
-        nextPort = (adapterExtension->LastInterruptPort + i) %
MAXIMUM_AHCI_PORT_COUNT;
+    for (i = 1; i <= portCount; i++)
+    {
+        nextPort = (AdapterExtension->LastInterruptPort + i) % portCount;
 
         if ((portPending & (0x1 << nextPort)) == 0)
             continue;
 
         NT_ASSERT(IsPortValid(AdapterExtension, nextPort));
 
-        if ((nextPort == adapterExtension->LastInterruptPort) ||
-            (adapterExtension->PortExtension[nextPort].IsActive == FALSE))
+        if ((nextPort == AdapterExtension->LastInterruptPort) ||
+            (AdapterExtension->PortExtension[nextPort].IsActive == FALSE))
         {
             return FALSE;
         }
 
         // we can assign this interrupt to this port
-        adapterExtension->LastInterruptPort = nextPort;
-        AhciInterruptHandler(&adapterExtension->PortExtension[nextPort]);
+        AdapterExtension->LastInterruptPort = nextPort;
+        AhciInterruptHandler(&AdapterExtension->PortExtension[nextPort]);
 
         // interrupt belongs to this device
         // should always return TRUE
@@ -448,19 +443,22 @@
             if (cdb->CDB10.OperationCode == SCSIOP_INQUIRY)
             {
                 Srb->SrbStatus = DeviceInquiryRequest(adapterExtension, Srb, cdb);
-                StorPortNotification(RequestComplete, adapterExtension, Srb);
-                return TRUE;
+            }
+            else
+            {
+                Srb->SrbStatus = SRB_STATUS_NO_DEVICE;
             }
         }
         else
         {
             Srb->SrbStatus = SRB_STATUS_BAD_FUNCTION;
-            StorPortNotification(RequestComplete, adapterExtension, Srb);
-            return TRUE;
         }
-    }
-
-    DebugPrint("\tUnknow function code recieved: %x\n", function);
+
+        StorPortNotification(RequestComplete, adapterExtension, Srb);
+        return TRUE;
+    }
+
+    DebugPrint("\tUnknown function code recieved: %x\n", function);
     Srb->SrbStatus = SRB_STATUS_BAD_FUNCTION;
     StorPortNotification(RequestComplete, adapterExtension, Srb);
     return TRUE;
@@ -672,7 +670,7 @@
         return SP_RETURN_ERROR;
     }
 
-    for (index = 0; index < MAXIMUM_AHCI_PORT_COUNT; index++)
+    for (index = 0; index < adapterExtension->PortCount; index++)
     {
         if ((adapterExtension->PortImplemented & (0x1<<index)) != 0)
             AhciPortInitialize(&adapterExtension->PortExtension[index]);
@@ -812,7 +810,7 @@
 
     PortExtension = &AdapterExtension->PortExtension[PathId];
 
-    NT_ASSERT(PathId < MAXIMUM_AHCI_PORT_COUNT);
+    NT_ASSERT(PathId < AdapterExtension->PortCount);
 
     // add Srb to queue
     AddQueue(&PortExtension->SrbQueue, Srb);
@@ -1021,7 +1019,7 @@
 {
     NT_ASSERT(pathId >= 0);
 
-    if (pathId >= MAXIMUM_AHCI_PORT_COUNT)
+    if (pathId >= AdapterExtension->PortCount)
     {
         return FALSE;
     }

Modified: branches/GSoC_2016/AHCI/drivers/storage/storahci/storahci.h
URL:
http://svn.reactos.org/svn/reactos/branches/GSoC_2016/AHCI/drivers/storage/…
==============================================================================
--- branches/GSoC_2016/AHCI/drivers/storage/storahci/storahci.h	[iso-8859-1] (original)
+++ branches/GSoC_2016/AHCI/drivers/storage/storahci/storahci.h	[iso-8859-1] Thu Jun 16
21:14:03 2016
@@ -10,7 +10,7 @@
 
 #define DEBUG 1
 
-#define MAXIMUM_AHCI_PORT_COUNT             12
+#define MAXIMUM_AHCI_PORT_COUNT             25
 #define MAXIMUM_QUEUE_BUFFER_SIZE           255
 #define MAXIMUM_TRANSFER_LENGTH             (128*1024) // 128 KB
 
@@ -20,6 +20,7 @@
 #define AHCI_Global_HBA_CONTROL_MRSM        (1 << 2)
 #define AHCI_Global_HBA_CONTROL_AE          (1 << 31)
 #define AHCI_Global_HBA_CAP_S64A            (1 << 31)
+#define AHCI_Global_Port_CMD_IDLE           ((1 << 0) | (1 << 4) | (1
<< 14) | (1 << 15)) // PxCMD.ST, PxCMD.CR, PxCMD.FRE and PxCMD.FR
 
 // 3.1.1 NCS = CAP[12:08] -> Align
 #define AHCI_Global_Port_CAP_NCS(x)            (((x) & 0xF00) >> 8)
@@ -254,6 +255,7 @@
     ULONG   AhciBaseAddress;
     PULONG  IS;// Interrupt Status, In case of MSIM == `1`
     ULONG   PortImplemented;// bit-mapping of ports which are implemented
+    ULONG   PortCount;
 
     USHORT  VendorID;
     USHORT  DeviceID;