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pci: pci_setcommand and pci_mapbar

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Matheus
2023-07-16 21:44:02 -03:00
parent cf858a87fc
commit f31071371b
2 changed files with 42 additions and 11 deletions
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kernel-src/include/kernel/pci.h
+19 -9
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@@ -1,27 +1,34 @@
#ifndef _PCI_H
#define _PCI_H
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
// 2 byte fields
#define PCI_CONFIG_VENDOR 0x0
#define PCI_CONFIG_DEVICEID 0x2
#define PCI_CONFIG_COMMAND 0x4
#define PCI_COMMAND_IO 0x1
#define PCI_COMMAND_MMIO 0x2
#define PCI_COMMAND_IRQ 0x400
#define PCI_CONFIG_STATUS 0x6
#define PCI_STATUS_HASCAP 0x10
#define PCI_STATUS_HASCAP 0x10
// 1 byte fields
#define PCI_CONFIG_REVISION 0x8
#define PCI_CONFIG_PROGIF 0x9
#define PCI_CONFIG_SUBCLASS 0xa
#define PCI_SUBCLASS_STORAGE_NVM 0x8
#define PCI_CONFIG_CLASS 0xb
#define PCI_CLASS_STORAGE 0x1
#define PCI_CONFIG_HEADERTYPE 0xe
#define PCI_HEADERTYPE_MULTIFUNCTION_MASK 0x80
#define PCI_HEADERTYPE_MASK 0x7f
#define PCI_HEADERTYPE_STANDARD 0
#define PCI_HEADERTYPE_MULTIFUNCTION_MASK 0x80
#define PCI_HEADERTYPE_MASK 0x7f
#define PCI_HEADERTYPE_STANDARD 0
#define PCI_CONFIG_CAP 0x34
#define PCI_CAP_MSI 0x5
#define PCI_CAP_MSIX 0x11
#define PCI_CAP_MSI 0x5
#define PCI_CAP_MSIX 0x11
typedef struct {
bool exists;
@@ -48,6 +55,7 @@ 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);
@@ -59,6 +67,8 @@ void pci_write32(int bus, int device, int function, uint32_t offset, uint32_t va
pcienum_t *pci_getenum(int class, int subclass, int progif, int vendor, int deviceid, int revision, int n);
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);
void pci_init();
#endif