X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/bb7ce16533fb6c1384775dea6e1150e74c229daf..0f73e6cc9945f9b4a074bb62b9708d1751fa3723:/lunaix-os/hal/pci.c

diff --git a/lunaix-os/hal/pci.c b/lunaix-os/hal/pci.c
index ca31e21..1f6cc3d 100644
--- a/lunaix-os/hal/pci.c
+++ b/lunaix-os/hal/pci.c
@@ -8,9 +8,10 @@
  * @copyright Copyright (c) 2022
  *
  */
-#include <hal/acpi/acpi.h>
-#include <hal/apic.h>
 #include <hal/pci.h>
+#include <sys/pci_hba.h>
+
+#include <klibc/string.h>
 #include <lunaix/fs/twifs.h>
 #include <lunaix/mm/valloc.h>
 #include <lunaix/spike.h>
@@ -18,15 +19,114 @@
 
 LOG_MODULE("PCI")
 
-static struct llist_header pci_devices;
+static DEFINE_LLIST(pci_devices);
+static DECLARE_HASHTABLE(pci_devcache, 8);
+
+static struct device* pcidev_cat;
+static struct device_def pci_def;
 
 void
 pci_probe_msi_info(struct pci_device* device);
 
+static inline void
+pci_log_device(struct pci_device* pcidev)
+{
+    pciaddr_t loc = pcidev->loc;
+    struct device_def* binddef = pcidev->binding.def;
+
+    if (!binddef) {
+        kprintf("pci.%d:%d:%d, no binding\n",
+                PCILOC_BUS(loc),
+                PCILOC_DEV(loc),
+                PCILOC_FN(loc));
+        return;
+    }
+
+    kprintf("pci.%d:%d:%d, dev.%xh:%xh.%d, %s\n",
+            PCILOC_BUS(loc),
+            PCILOC_DEV(loc),
+            PCILOC_FN(loc),
+            binddef->class.fn_grp,
+            binddef->class.device,
+            binddef->class.variant,
+            binddef->name);
+}
+
+static struct pci_device*
+pci_create_device(pciaddr_t loc, ptr_t pci_base, int devinfo)
+{
+    pci_reg_t class = pci_read_cspace(pci_base, 0x8);
+    struct hbucket* bucket = device_definitions_byif(DEVIF_PCI);
+
+    u32_t devid = PCI_DEV_DEVID(devinfo);
+    u32_t vendor = PCI_DEV_VENDOR(devinfo);
+    pci_reg_t intr = pci_read_cspace(pci_base, 0x3c);
+
+    struct pci_device* device = vzalloc(sizeof(struct pci_device));
+    device->class_info = class;
+    device->device_info = devinfo;
+    device->cspace_base = pci_base;
+    device->intr_info = intr;
+
+    device_create(&device->dev, pcidev_cat, DEV_IFSYS, NULL);
+
+    pci_probe_msi_info(device);
+    pci_probe_bar_info(device);
+
+    llist_append(&pci_devices, &device->dev_chain);
+    device_register(&device->dev, &pci_def.class, "%x", loc);
+    pci_def.class.variant++;
+
+    // find a suitable binding
+
+    struct pci_device_def *pos, *n;
+    hashtable_bucket_foreach(bucket, pos, n, devdef.hlist_if)
+    {
+        if (pos->dev_class != PCI_DEV_CLASS(class)) {
+            continue;
+        }
+
+        u32_t idm = pos->ident_mask;
+        int result = (pos->dev_ident & idm) == (devinfo & idm);
+
+        if (result) {
+            goto found;
+        }
+    }
+
+    goto done;
+
+found:
+    if (!pos->devdef.bind) {
+        kprintf(KERROR "pci_loc:%x, (%xh:%xh.%d) unbindable\n",
+                loc,
+                pos->devdef.class.fn_grp,
+                pos->devdef.class.device,
+                pos->devdef.class.variant);
+        goto done;
+    }
+
+    int errno = pos->devdef.bind(&pos->devdef, &device->dev);
+    if (errno) {
+        kprintf(KERROR "pci_loc:%x, (%xh:%xh.%d) failed, e=%d\n",
+                loc,
+                pos->devdef.class.fn_grp,
+                pos->devdef.class.device,
+                pos->devdef.class.variant,
+                errno);
+        goto done;
+    }
+
+    device->binding.def = &pos->devdef;
+
+done:
+    return device;
+}
+
 void
-pci_probe_device(int bus, int dev, int funct)
+pci_probe_device(pciaddr_t pci_loc)
 {
-    uint32_t base = PCI_ADDRESS(bus, dev, funct);
+    u32_t base = PCI_CFGADDR(pci_loc);
     pci_reg_t reg1 = pci_read_cspace(base, 0);
 
     // Vendor=0xffff则表示设备不存在
@@ -40,41 +140,53 @@ pci_probe_device(int bus, int dev, int funct)
     // 防止堆栈溢出
     // QEMU的ICH9/Q35实现似乎有点问题，对于多功能设备的每一个功能的header type
     //  都将第七位置位。而virtualbox 就没有这个毛病。
-    if ((hdr_type & 0x80) && funct == 0) {
+    if ((hdr_type & 0x80) && PCILOC_FN(pci_loc) == 0) {
         hdr_type = hdr_type & ~0x80;
         // 探测多用途设备（multi-function device）
         for (int i = 1; i < 7; i++) {
-            pci_probe_device(bus, dev, i);
+            pci_probe_device(pci_loc + i);
         }
     }
 
-    if (hdr_type != PCI_TDEV) {
-        // XXX: 目前忽略所有桥接设备，比如PCI-PCI桥接器，或者是CardBus桥接器
-        return;
+    struct pci_device *pos, *n;
+    hashtable_hash_foreach(pci_devcache, pci_loc, pos, n, dev_cache)
+    {
+        if (pos->loc == pci_loc) {
+            pci_log_device(pos);
+            return;
+        }
     }
 
-    pci_reg_t intr = pci_read_cspace(base, 0x3c);
-    pci_reg_t class = pci_read_cspace(base, 0x8);
-
-    struct pci_device* device = valloc(sizeof(struct pci_device));
-    *device = (struct pci_device){ .cspace_base = base,
-                                   .class_info = class,
-                                   .device_info = reg1,
-                                   .intr_info = intr };
-
-    pci_probe_msi_info(device);
+    struct pci_device* pcidev = pci_create_device(pci_loc, base, reg1);
+    if (pcidev) {
+        pcidev->loc = pci_loc;
+        hashtable_hash_in(pci_devcache, &pcidev->dev_cache, pci_loc);
+        pci_log_device(pcidev);
+    }
+}
 
-    llist_append(&pci_devices, &device->dev_chain);
+void
+pci_scan()
+{
+    for (u32_t loc = 0; loc < (pciaddr_t)-1; loc += 8) {
+        pci_probe_device((pciaddr_t)loc);
+    }
 }
 
 void
-pci_probe()
+pci_probe_bar_info(struct pci_device* device)
 {
-    // 暴力扫描所有PCI设备
-    // XXX: 尽管最多会有256条PCI总线，但就目前而言，只考虑bus #0就足够了
-    for (int bus = 0; bus < 1; bus++) {
-        for (int dev = 0; dev < 32; dev++) {
-            pci_probe_device(bus, dev, 0);
+    u32_t bar;
+    struct pci_base_addr* ba;
+    for (size_t i = 0; i < 6; i++) {
+        ba = &device->bar[i];
+        ba->size = pci_bar_sizing(device, &bar, i + 1);
+        if (PCI_BAR_MMIO(bar)) {
+            ba->start = PCI_BAR_ADDR_MM(bar);
+            ba->type |= PCI_BAR_CACHEABLE(bar) ? BAR_TYPE_CACHABLE : 0;
+            ba->type |= BAR_TYPE_MMIO;
+        } else {
+            ba->start = PCI_BAR_ADDR_IO(bar);
         }
     }
 }
@@ -94,7 +206,7 @@ pci_probe_msi_info(struct pci_device* device)
     }
 
     pci_reg_t cap_ptr = pci_read_cspace(device->cspace_base, 0x34) & 0xff;
-    uint32_t cap_hdr;
+    u32_t cap_hdr;
 
     while (cap_ptr) {
         cap_hdr = pci_read_cspace(device->cspace_base, cap_ptr);
@@ -107,47 +219,8 @@ pci_probe_msi_info(struct pci_device* device)
     }
 }
 
-#define PCI_PRINT_BAR_LISTING
-
-int
-__pci_read_cspace(struct v_inode* inode, void* buffer, size_t len, size_t fpos)
-{
-    if (len < 256) {
-        return ERANGE;
-    }
-
-    struct twifs_node* node = (struct twifs_node*)(inode->data);
-    struct pci_device* pcidev = (struct pci_device*)(node->data);
-
-    for (size_t i = 0; i < 256; i += sizeof(pci_reg_t)) {
-        *(pci_reg_t*)(buffer + i) = pci_read_cspace(pcidev->cspace_base, i);
-    }
-
-    return 256;
-}
-
-void
-pci_build_fsmapping()
-{
-    struct twifs_node *pci_class = twifs_dir_node(NULL, "pci"), *pci_dev;
-    struct pci_device *pos, *n;
-    llist_for_each(pos, n, &pci_devices, dev_chain)
-    {
-        pci_dev = twifs_dir_node(pci_class,
-                                 "B%d:D%d:F%d.%x:%x",
-                                 PCI_BUS_NUM(pos->cspace_base),
-                                 PCI_SLOT_NUM(pos->cspace_base),
-                                 PCI_FUNCT_NUM(pos->cspace_base),
-                                 PCI_DEV_VENDOR(pos->device_info),
-                                 PCI_DEV_DEVID(pos->device_info));
-        struct twifs_node* fnode = twifs_file_node(pci_dev, "cspace");
-        fnode->data = pos;
-        fnode->ops.read = __pci_read_cspace;
-    }
-}
-
 size_t
-pci_bar_sizing(struct pci_device* dev, uint32_t* bar_out, uint32_t bar_num)
+pci_bar_sizing(struct pci_device* dev, u32_t* bar_out, u32_t bar_num)
 {
     pci_reg_t bar = pci_read_cspace(dev->cspace_base, PCI_REG_BAR(bar_num));
     if (!bar) {
@@ -166,40 +239,10 @@ pci_bar_sizing(struct pci_device* dev, uint32_t* bar_out, uint32_t bar_num)
     return ~sized + 1;
 }
 
-void
-pci_setup_msi(struct pci_device* device, int vector)
-{
-    // Dest: APIC#0, Physical Destination, No redirection
-    uint32_t msi_addr = (__APIC_BASE_PADDR);
-
-    // Edge trigger, Fixed delivery
-    uint32_t msi_data = vector;
-
-    pci_write_cspace(
-      device->cspace_base, PCI_MSI_ADDR(device->msi_loc), msi_addr);
-
-    pci_reg_t reg1 = pci_read_cspace(device->cspace_base, device->msi_loc);
-    pci_reg_t msg_ctl = reg1 >> 16;
-
-    int offset = !!(msg_ctl & MSI_CAP_64BIT) * 4;
-    pci_write_cspace(device->cspace_base,
-                     PCI_MSI_DATA(device->msi_loc, offset),
-                     msi_data & 0xffff);
-
-    if ((msg_ctl & MSI_CAP_MASK)) {
-        pci_write_cspace(
-          device->cspace_base, PCI_MSI_MASK(device->msi_loc, offset), 0);
-    }
-
-    // manipulate the MSI_CTRL to allow device using MSI to request service.
-    reg1 = (reg1 & 0xff8fffff) | 0x10000;
-    pci_write_cspace(device->cspace_base, device->msi_loc, reg1);
-}
-
 struct pci_device*
-pci_get_device_by_id(uint16_t vendorId, uint16_t deviceId)
+pci_get_device_by_id(u16_t vendorId, u16_t deviceId)
 {
-    uint32_t dev_info = vendorId | (deviceId << 16);
+    u32_t dev_info = vendorId | (deviceId << 16);
     struct pci_device *pos, *n;
     llist_for_each(pos, n, &pci_devices, dev_chain)
     {
@@ -212,7 +255,7 @@ pci_get_device_by_id(uint16_t vendorId, uint16_t deviceId)
 }
 
 struct pci_device*
-pci_get_device_by_class(uint32_t class)
+pci_get_device_by_class(u32_t class)
 {
     struct pci_device *pos, *n;
     llist_for_each(pos, n, &pci_devices, dev_chain)
@@ -225,18 +268,158 @@ pci_get_device_by_class(uint32_t class)
     return NULL;
 }
 
+static void
+__pci_read_cspace(struct twimap* map)
+{
+    struct pci_device* pcidev = (struct pci_device*)(map->data);
+
+    for (size_t i = 0; i < 256; i += sizeof(pci_reg_t)) {
+        *(pci_reg_t*)(map->buffer + i) =
+          pci_read_cspace(pcidev->cspace_base, i);
+    }
+
+    map->size_acc = 256;
+}
+
+/*---------- TwiFS interface definition ----------*/
+
+static void
+__pci_read_revid(struct twimap* map)
+{
+    int class = twimap_data(map, struct pci_device*)->class_info;
+    twimap_printf(map, "0x%x", PCI_DEV_REV(class));
+}
+
+static void
+__pci_read_class(struct twimap* map)
+{
+    int class = twimap_data(map, struct pci_device*)->class_info;
+    twimap_printf(map, "0x%x", PCI_DEV_CLASS(class));
+}
+
+static void
+__pci_read_devinfo(struct twimap* map)
+{
+    int devinfo = twimap_data(map, struct pci_device*)->device_info;
+    twimap_printf(
+      map, "%x:%x", PCI_DEV_VENDOR(devinfo), PCI_DEV_DEVID(devinfo));
+}
+
+static void
+__pci_bar_read(struct twimap* map)
+{
+    struct pci_device* pcidev = twimap_data(map, struct pci_device*);
+    int bar_index = twimap_index(map, int);
+
+    struct pci_base_addr* bar = &pcidev->bar[bar_index];
+
+    if (!bar->start && !bar->size) {
+        twimap_printf(map, "[%d] not present \n", bar_index);
+        return;
+    }
+
+    twimap_printf(
+      map, "[%d] base=%.8p, size=%.8p, ", bar_index, bar->start, bar->size);
+
+    if ((bar->type & BAR_TYPE_MMIO)) {
+        twimap_printf(map, "mmio");
+        if ((bar->type & BAR_TYPE_CACHABLE)) {
+            twimap_printf(map, ", prefetchable");
+        }
+    } else {
+        twimap_printf(map, "io");
+    }
+
+    twimap_printf(map, "\n");
+}
+
+static int
+__pci_bar_gonext(struct twimap* map)
+{
+    if (twimap_index(map, int) >= 5) {
+        return 0;
+    }
+    map->index += 1;
+    return 1;
+}
+
+static void
+__pci_read_binding(struct twimap* map)
+{
+    struct pci_device* pcidev = twimap_data(map, struct pci_device*);
+    struct device_def* devdef = pcidev->binding.def;
+    if (!devdef) {
+        return;
+    }
+
+    twimap_printf(map,
+                  "%xh:%xh.%d",
+                  devdef->class.fn_grp,
+                  devdef->class.device,
+                  devdef->class.variant);
+}
+
+static void
+__pci_trigger_bus_rescan(struct twimap* map)
+{
+    pci_scan();
+}
+
 void
-pci_init()
+pci_build_fsmapping()
 {
-    llist_init_head(&pci_devices);
-    acpi_context* acpi = acpi_get_context();
-    assert_msg(acpi, "ACPI not initialized.");
-    if (acpi->mcfg.alloc_num) {
-        // PCIe Enhanced Configuration Mechanism is supported.
-        // TODO: support PCIe addressing mechanism
+    struct twifs_node *pci_class = twifs_dir_node(NULL, "pci"), *pci_dev;
+    struct pci_device *pos, *n;
+    struct twimap* map;
+
+    map = twifs_mapping(pci_class, NULL, "rescan");
+    map->read = __pci_trigger_bus_rescan;
+
+    llist_for_each(pos, n, &pci_devices, dev_chain)
+    {
+        pci_dev = twifs_dir_node(pci_class, "%x", pos->loc);
+
+        map = twifs_mapping(pci_dev, pos, "config");
+        map->read = __pci_read_cspace;
+
+        map = twifs_mapping(pci_dev, pos, "revision");
+        map->read = __pci_read_revid;
+
+        map = twifs_mapping(pci_dev, pos, "class");
+        map->read = __pci_read_class;
+
+        map = twifs_mapping(pci_dev, pos, "binding");
+        map->read = __pci_read_binding;
+
+        map = twifs_mapping(pci_dev, pos, "io_bases");
+        map->read = __pci_bar_read;
+        map->go_next = __pci_bar_gonext;
     }
-    // Otherwise, fallback to use legacy PCI 3.0 method.
-    pci_probe();
+}
+EXPORT_TWIFS_PLUGIN(pci_devs, pci_build_fsmapping);
+
+/*---------- PCI 3.0 HBA device definition ----------*/
+
+static int
+pci_load_devices(struct device_def* def)
+{
+    pcidev_cat = device_addcat(NULL, "pci");
+
+    pci_scan();
+
+    return 0;
+}
+
+void
+pci_bind_instance(struct pci_device* pcidev, void* devobj)
+{
+    pcidev->dev.underlay = devobj;
+    pcidev->binding.dev = devobj;
+}
 
-    pci_build_fsmapping();
-}
\ No newline at end of file
+static struct device_def pci_def = {
+    .name = "pci3.0-hba",
+    .class = DEVCLASS(DEVIF_SOC, DEVFN_BUSIF, DEV_PCI),
+    .init = pci_load_devices
+};
+EXPORT_DEVICE(pci3hba, &pci_def, load_poststage);