pci: msi-x support

kernel-src/include/kernel/pci.h

@@ -11,7 +11,7 @@
 #define PCI_CONFIG_COMMAND 0x4
 	#define PCI_COMMAND_IO 0x1
 	#define PCI_COMMAND_MMIO 0x2
-	#define PCI_COMMAND_IRQ 0x400
+	#define PCI_COMMAND_IRQDISABLE 0x400
 #define PCI_CONFIG_STATUS 0x6
 	#define PCI_STATUS_HASCAP 0x10
 
@@ -35,6 +35,13 @@ typedef struct {
 	int offset;
 } pcicap_t;
 
+typedef struct {
+	uintptr_t address;
+	size_t length;
+	bool mmio;
+	bool prefetchable;
+} pcibar_t;
+
 typedef struct pcienum_t {
 	struct pcienum_t *next;
 	int bus;
@@ -49,15 +56,18 @@ typedef struct pcienum_t {
 	int revision;
 	pcicap_t msi;
 	pcicap_t msix;
+	pcibar_t bar[6];
+	union {
+		struct {
+			int bir;
+			uintmax_t tableoffset;
+			int pbir;
+			uintmax_t pboffset;
+			size_t entrycount;
+		} msix;
+	} irq;
 } pcienum_t;
 
-typedef struct {
-	uintptr_t address;
-	size_t length;
-	bool mmio;
-	bool prefetchable;
-} pcibar_t;
-
 uint8_t pci_read8(int bus, int device, int function, uint32_t offset);
 uint16_t pci_read16(int bus, int device, int function, uint32_t offset);
 uint32_t pci_read32(int bus, int device, int function, uint32_t offset);
@@ -69,6 +79,9 @@ int pci_getcapoffset(pcienum_t *e, int cap, int n);
 pcibar_t pci_getbar(pcienum_t *e, int bar);
 void *pci_mapbar(pcibar_t bar);
 void pci_setcommand(pcienum_t *e, int mask, int v);
+size_t pci_initmsix(pcienum_t *e);
+void pci_msixsetmask(pcienum_t *e, int v);
+void pci_msixadd(pcienum_t *e, int msixvec, int vec, int edgetrigger, int deassert);
 void pci_init();
 
 #endif

kernel-src/include/x86-64/arch/pci.h

@@ -8,6 +8,7 @@
 #include <arch/io.h>
 #include <arch/acpi.h>
 #include <kernel/pmm.h>
+#include <arch/cpu.h>
 
 static size_t mcfgentrycount;
 static mcfgentry_t *mcfgentries;
@@ -65,6 +66,11 @@ static void mcfg_write32(int bus, int device, int function, uint32_t offset, uin
 	*address = value;
 }
 
+static uint64_t msiformatmessage(uint32_t *data, int vector, int edgetrigger, int deassert) {
+	*data = (edgetrigger << 15) | (deassert << 14) | vector;
+	return 0xfee00000 | (_cpu()->id << 12);
+}
+
 static void pci_archinit() {
 	mcfg_t *mcfg = arch_acpi_findtable("MCFG", 0);
 	if (mcfg) {