refactor: make pci device driver loading passive, pci bus scanner will not load them...

[lunaix-os.git] / lunaix-os / hal / ahci / ahci_pci.c

diff --git a/lunaix-os/hal/ahci/ahci_pci.c b/lunaix-os/hal/ahci/ahci_pci.c
new file mode 100644 (file)
index 0000000..0ecde58
--- /dev/null
+++ b/lunaix-os/hal/ahci/ahci_pci.c
@@ -0,0 +1,51 @@
+#include <lunaix/spike.h>
+
+#include <hal/ahci/ahci.h>
+#include <hal/pci.h>
+#include <sys/pci_hba.h>
+
+static int
+ahci_pci_bind(struct device_def* def, struct device* dev)
+{
+    struct pci_device* ahci_dev = container_of(dev, struct pci_device, dev);
+
+    struct pci_base_addr* bar6 = &ahci_dev->bar[5];
+    assert_msg(bar6->type & BAR_TYPE_MMIO, "AHCI: BAR#6 is not MMIO.");
+
+    pci_reg_t cmd = pci_read_cspace(ahci_dev->cspace_base, PCI_REG_STATUS_CMD);
+
+    // 禁用传统中断（因为我们使用MSI），启用MMIO访问，允许PCI设备间访问
+    cmd |= (PCI_RCMD_MM_ACCESS | PCI_RCMD_DISABLE_INTR | PCI_RCMD_BUS_MASTER);
+
+    pci_write_cspace(ahci_dev->cspace_base, PCI_REG_STATUS_CMD, cmd);
+
+    int iv = isrm_ivexalloc(ahci_hba_isr);
+    pci_setup_msi(ahci_dev, iv);
+
+    struct ahci_driver_param param = {
+        .mmio_base = bar6->start,
+        .mmio_size = bar6->size,
+        .ahci_iv = iv,
+    };
+
+    struct ahci_driver* ahci_drv = ahci_driver_init(&param);
+    pci_bind_instance(ahci_dev, ahci_drv);
+
+    return 0;
+}
+
+static int
+ahci_pci_init(struct device_def* def)
+{
+    return pci_bind_definition_all(pcidev_def(def));
+}
+
+static struct pci_device_def ahcidef = {
+    .dev_class = AHCI_HBA_CLASS,
+    .ident_mask = PCI_MATCH_ANY,
+    .devdef = { .class = DEVCLASS(DEVIF_PCI, DEVFN_STORAGE, DEV_SATA),
+                .name = "Generic SATA",
+                .init = ahci_pci_init,
+                .bind = ahci_pci_bind }
+};
+EXPORT_PCI_DEVICE(ahci, &ahcidef, load_postboot);
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