initgraph, whole lot of refactor

dev/block/nvme/core.c

@@ -1,16 +1,34 @@
-#include <zinnia/cmdline.h>
+#define pr_fmt(fmt) "nvme: " fmt
+
+#include <zinnia/fdt.h>
 #include <zinnia/module.h>
+#include <zinnia/pci.h>
 #include <zinnia/print.h>
+#include <zinnia/utils.h>
+#include <config.h>
+
+#if CONFIG_NVME_PCI
+#include "nvme_pci.h"
+#endif
+
+struct nvme_dev {
+#if CONFIG_NVME_PCI
+    struct pci_device pci_dev;
+#endif
+};
 
 errno_t nvme_init(struct module* mod) {
-    log("Hello world from NVMe!\n");
+    errno_t status = 0;
 
-    return 0;
+#if CONFIG_NVME_PCI
+    status = pci_driver_register(&nvme_driver);
+#endif
+
+    return status;
 }
 
 errno_t nvme_exit(struct module* mod) {
-    log("Good bye from NVMe!\n");
-
+    // TODO: Unregister
     return 0;
 }
 

dev/block/nvme/nvme_pci.h

@@ -0,0 +1,3 @@
+#pragma once
+
+extern struct pci_driver nvme_driver;

dev/block/nvme/pci.c

@@ -0,0 +1,23 @@
+#include <zinnia/errno.h>
+#include <zinnia/module.h>
+#include <zinnia/pci.h>
+
+static errno_t nvme_pci_probe(struct pci_device* dev, const struct pci_match* match) {
+    pci_log(dev, "Detected controller \n");
+
+    return 0;
+}
+
+static const struct pci_match nvme_match[] = {
+    // Generic NVMe device. Assume no quirks or any funny business.
+    {PCI_MATCH_CLASS(1, 8, 2), .data = 0},
+};
+
+MATCH_TABLE("pci", nvme_match);
+
+struct pci_driver nvme_driver = {
+    .name = "nvme_pci",
+    .match = nvme_match,
+    .num_matches = ARRAY_SIZE(nvme_match),
+    .probe = nvme_pci_probe,
+};