Avago Technologies LSI53C1010 - Manual (Page 214)

9-16 SCRIPTS Programming Topics
static void HandleDataInPM(ULONG PCIDeviceIOBase, INT\ *Current_SG_Entry)
{
ULONG Current_DSP; /* Holds current DSP value */
/* where am I in the SG list? */
Current_DSP = IORead32(PCIDeviceIOBase+DSP) - 8;
*Current_SG_Entry = (VINT) (Current_DSP -\ FirstDIMove_paddr) / 8;
/* On Data In phase mismatch interrupts the part is automatically flushed so there
is no need to check for residual data in the part, except for data in the SWIDE byte*/
/* now update the address and count */
dsa_table[DATA_BUF1 + *Current_SG_Entry].address +=
dsa_table[DATA_BUF1 + *Current_SG_Entry].count -
(IORead32(PCIDeviceIOBase+DBC) & 0x00FFFFFFl);
dsa_table[DATA_BUF1 + *Current_SG_Entry].count =
IORead32(PCIDeviceIOBase+DBC) & 0x00FFFFFFl;
/* update the jump offset into the SG list */
script[(INT) (Ent_RW_Offset_patch_di/4) + 1] =
(ULONG) *Current_SG_Entry * 8;
/* move the byte in SWIDE if necessary */
if (IORead8(PCIDeviceIOBase+SCNTL2) & 0x01)
{
/* patch move to get byte out of chip */
script[(INT) E_RW_Last_di_byte_buf_Used[0]] =
buffer_table[DATA_BUF1 +
*Current_SG_Entry].address;
/* start script to move byte */
iowrite32(PCIDeviceIOBase+DSP,
getPhysAddr(rw_script) +
Ent_RW_Move_swide_byte);
}
else
/* nothing in swide so start the disconnect
/*script */
iowrite32(PCIDeviceIOBase+DSP,
getPhysAddr(rw_script) + Ent_RW_Handle_Phase);
}
Figure 9.9 Example Function for Handling DATA OUT Phase Mismatch Interrupts
/***********************************************************
Function: HandleDataOutPM
Purpose: To handle clean up after a Phase Mismatch (PM) during Data Out phase
Input: A pointer the pcidev_record.
Output: None
Assumptions: That a phase mismatch has actually
occurred during data out.
Restrictions: None
Other functions called:IORead32/8 to read chip info
RMWon to set bits in chip registers
iowrite32 to start the script
Global Variables Used:FirstDOMove_paddr is the
physical address of the first Data
Out block move in the scatter/gather
list. This is needed to get the
location of the scatter/gather entry