feat: device subsystem rework

[lunaix-os.git] / lunaix-os / hal / pci.c

diff --git a/lunaix-os/hal/pci.c b/lunaix-os/hal/pci.c
index 32299cdf8d2fa24d4302b9110585ac1b2f68a8e3..9ac45d5ca680a266d429dc3203a188035acea78a 100644 (file)
--- a/lunaix-os/hal/pci.c
+++ b/lunaix-os/hal/pci.c
@@ -1,21 +1,103 @@
-#include <hal/acpi/acpi.h>
-#include <hal/apic.h>
+/**
+ * @file pci.c
+ * @author Lunaixsky (zelong56@gmail.com)
+ * @brief A software implementation of PCI Local Bus Specification Revision 3.0
+ * @version 0.1
+ * @date 2022-06-28
+ *
+ * @copyright Copyright (c) 2022
+ *
+ */

 #include <hal/pci.h>
 #include <hal/pci.h>

-#include <lunaix/mm/kalloc.h>
+#include <sys/pci_hba.h>
+
+#include <klibc/string.h>
+#include <lunaix/fs/twifs.h>
+#include <lunaix/mm/valloc.h>

 #include <lunaix/spike.h>
 #include <lunaix/syslog.h>
 
 LOG_MODULE("PCI")
 
 #include <lunaix/spike.h>
 #include <lunaix/syslog.h>
 
 LOG_MODULE("PCI")
 

-static struct llist_header pci_devices;
+static DEFINE_LLIST(pci_devices);

 
 void
 pci_probe_msi_info(struct pci_device* device);
 
 
 void
 pci_probe_msi_info(struct pci_device* device);
 

+static struct pci_device*
+pci_create_device(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);
+
+    kappendf(".%x:%x, ", vendor, devid);
+
+    struct pci_device_def *pos, *n;
+    hashtable_bucket_foreach(bucket, pos, n, devdef.hlist_if)
+    {
+        if (pos->dev_class != PCI_DEV_CLASS(class)) {
+            continue;
+        }
+
+        int result = (pos->dev_vendor & vendor) == vendor &&
+                     (pos->dev_id & devid) == devid;
+
+        if (result) {
+            goto found;
+        }
+    }
+
+    kappendf(KWARN "unknown device\n");
+
+    return NULL;
+
+found:
+    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_prepare(&device->dev);
+
+    pci_probe_msi_info(device);
+    pci_probe_bar_info(device);
+
+    kappendf("%s (dev.%x:%x:%x) \n",
+             pos->devdef.name,
+             pos->devdef.class.meta,
+             pos->devdef.class.device,
+             pos->devdef.class.variant);
+
+    if (!pos->devdef.init_for) {
+        kappendf(KERROR "bad def\n");
+        goto fail;
+    }
+
+    int errno = pos->devdef.init_for(&pos->devdef, &device->dev);
+    if (errno) {
+        kappendf(KERROR "failed (e=%d)\n", errno);
+        goto fail;
+    }
+
+    llist_append(&pci_devices, &device->dev_chain);
+
+    return device;
+
+fail:
+    vfree(device);
+    return NULL;
+}
+

 void
 pci_probe_device(int bus, int dev, int funct)
 {
 void
 pci_probe_device(int bus, int dev, int funct)
 {

-    uint32_t base = PCI_ADDRESS(bus, dev, funct);
+    u32_t base = PCI_ADDRESS(bus, dev, funct);

     pci_reg_t reg1 = pci_read_cspace(base, 0);
 
     // Vendor=0xffff则表示设备不存在
     pci_reg_t reg1 = pci_read_cspace(base, 0);
 
     // Vendor=0xffff则表示设备不存在


@@ -42,32 +124,39 @@ pci_probe_device(int bus, int dev, int funct)
         return;
     }
 
         return;
     }
 

-    pci_reg_t intr = pci_read_cspace(base, 0x3c);
-    pci_reg_t class = pci_read_cspace(base, 0x8);
-
-    struct pci_device* device = lxmalloc(sizeof(struct pci_device));
-    *device = (struct pci_device){ .cspace_base = base,
-                                   .class_info = class,
-                                   .device_info = reg1,
-                                   .intr_info = intr };
+    kprintf("pci.%d:%d:%d", bus, dev, funct);

 
 

-    pci_probe_msi_info(device);
-
-    llist_append(&pci_devices, &device->dev_chain);
+    pci_create_device(base, reg1);

 }
 
 void
 }
 
 void

-pci_probe()
+pci_scan()

 {
 {

-    // 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 bus = 0; bus < 256; bus++) {

         for (int dev = 0; dev < 32; dev++) {
             pci_probe_device(bus, dev, 0);
         }
     }
 }
 
         for (int dev = 0; dev < 32; dev++) {
             pci_probe_device(bus, dev, 0);
         }
     }
 }
 

+void
+pci_probe_bar_info(struct pci_device* device)
+{
+    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);
+        }
+    }
+}
+

 void
 pci_probe_msi_info(struct pci_device* device)
 {
 void
 pci_probe_msi_info(struct pci_device* device)
 {


@@ -83,7 +172,7 @@ pci_probe_msi_info(struct pci_device* device)
     }
 
     pci_reg_t cap_ptr = pci_read_cspace(device->cspace_base, 0x34) & 0xff;
     }
 
     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);
 
     while (cap_ptr) {
         cap_hdr = pci_read_cspace(device->cspace_base, cap_ptr);


@@ -96,52 +185,8 @@ pci_probe_msi_info(struct pci_device* device)
     }
 }
 
     }
 }
 

-#define PCI_PRINT_BAR_LISTING
-
-void
-pci_print_device()
-{
-    struct pci_device *pos, *n;
-    llist_for_each(pos, n, &pci_devices, dev_chain)
-    {
-        kprintf(KINFO "(B%xh:D%xh:F%xh) Dev %x:%x, Class 0x%x\n",
-                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),
-                PCI_DEV_CLASS(pos->class_info));
-
-        kprintf(KINFO "\t IRQ: %d, INT#x: %d\n",
-                PCI_INTR_IRQ(pos->intr_info),
-                PCI_INTR_PIN(pos->intr_info));
-#ifdef PCI_PRINT_BAR_LISTING
-        pci_reg_t bar;
-        for (size_t i = 1; i <= 6; i++) {
-            size_t size = pci_bar_sizing(pos, &bar, i);
-            if (!bar)
-                continue;
-            if (PCI_BAR_MMIO(bar)) {
-                kprintf(KINFO "\t BAR#%d (MMIO) %p [%d]\n",
-                        i,
-                        PCI_BAR_ADDR_MM(bar),
-                        size);
-            } else {
-                kprintf(KINFO "\t BAR#%d (I/O) %p [%d]\n",
-                        i,
-                        PCI_BAR_ADDR_IO(bar),
-                        size);
-            }
-        }
-#endif
-        if (pos->msi_loc) {
-            kprintf(KINFO "\t MSI supported (@%xh)\n", pos->msi_loc);
-        }
-    }
-}
-

 size_t
 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) {
 {
     pci_reg_t bar = pci_read_cspace(dev->cspace_base, PCI_REG_BAR(bar_num));
     if (!bar) {


@@ -156,34 +201,14 @@ pci_bar_sizing(struct pci_device* dev, uint32_t* bar_out, uint32_t bar_num)
         sized = PCI_BAR_ADDR_MM(sized);
     }
     *bar_out = bar;
         sized = PCI_BAR_ADDR_MM(sized);
     }
     *bar_out = bar;

+    pci_write_cspace(dev->cspace_base, PCI_REG_BAR(bar_num), bar);

     return ~sized + 1;
 }
 
     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 | 0x8);
-
-    // Edge trigger, Fixed delivery
-    uint32_t msi_data = vector;
-
-    pci_write_cspace(
-      device->cspace_base, PCI_MSI_ADDR(device->msi_loc), msi_addr);
-    pci_write_cspace(
-      device->cspace_base, PCI_MSI_DATA(device->msi_loc), msi_data & 0xffff);
-
-    pci_reg_t reg1 = pci_read_cspace(device->cspace_base, device->msi_loc);
-
-    // manipulate the MSI_CTRL to allow device using MSI to request service.
-    reg1 = ((((reg1 >> 16) & ~0x70) | 0x1) << 16) | (reg1 & 0xffff);
-    pci_write_cspace(device->cspace_base, device->msi_loc, reg1);
-}
-

 struct pci_device*
 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)
     {
     struct pci_device *pos, *n;
     llist_for_each(pos, n, &pci_devices, dev_chain)
     {


@@ -196,7 +221,7 @@ pci_get_device_by_id(uint16_t vendorId, uint16_t deviceId)
 }
 
 struct pci_device*
 }
 
 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)
 {
     struct pci_device *pos, *n;
     llist_for_each(pos, n, &pci_devices, dev_chain)


@@ -209,16 +234,118 @@ pci_get_device_by_class(uint32_t class)
     return NULL;
 }
 
     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_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;
+}
+

 void
 void

-pci_init()
+pci_build_fsmapping()
+{
+    struct twifs_node *pci_class = twifs_dir_node(NULL, "pci"), *pci_dev;
+    struct pci_device *pos, *n;
+    struct twimap* map;
+    llist_for_each(pos, n, &pci_devices, dev_chain)
+    {
+        pci_dev = twifs_dir_node(pci_class,
+                                 "%.2d:%.2d:%.2d.%.4x:%.4x",
+                                 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));
+
+        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, "io_bases");
+        map->read = __pci_bar_read;
+        map->go_next = __pci_bar_gonext;
+    }
+}
+EXPORT_TWIFS_PLUGIN(pci_devs, pci_build_fsmapping);
+
+/*---------- PCI 3.0 HBA device definition ----------*/
+
+static int
+pci_load_devices(struct device_def* def)

 {
 {

-    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
-    }
-    // Otherwise, fallback to use legacy PCI 3.0 method.
-    pci_probe();
-}
\ No newline at end of file
+    pci_scan();
+
+    return 0;
+}
+
+static struct device_def pci_def = {
+    .name = "pci3.0-hba",
+    .class = DEVCLASS(DEVIF_SOC, DEVFN_BUSIF, DEV_BUS, 0),
+    .init = pci_load_devices
+};
+EXPORT_DEVICE(pci3hba, &pci_def, load_poststage);