idedrv Implement DMA reading/writing without IRQ support

kernel/device/pci/pci.h

@@ -36,6 +36,17 @@
 #define PCI_BAR_MEM64    0x04
 #define PCI_BAR_PREFETCH 0x08
 
+#define PCI_CMD_IOSPACE         0
+#define PCI_CMD_MEMSPACE        1
+#define PCI_CMD_BUSMASTER       2
+#define PCI_CMD_SPECIAL_CYCLES  3
+#define PCI_CMD_MEMWRIVENA      4
+#define PCI_CMD_VGA_PALT_SNOOP  5
+#define PCI_CMD_PARITY_ERR_RESP 6
+#define PCI_CMD_SERR            8
+#define PCI_CMD_FBBENA          9
+#define PCI_CMD_INTRDISABLE     10
+
 #define PCI_CAP_MSI 0x05
 
 struct pci_vendor {