added symbiotic virtio device

[palacios.git] / palacios / src / devices / pci.c

diff --git a/palacios/src/devices/pci.c b/palacios/src/devices/pci.c
index cce7aa8..7cd1147 100644 (file)
--- a/palacios/src/devices/pci.c
+++ b/palacios/src/devices/pci.c
@@ -41,6 +41,7 @@
 #define CONFIG_ADDR_PORT    0x0cf8
 #define CONFIG_DATA_PORT    0x0cfc
 
+#define PCI_DEV_IO_PORT_BASE 0xc000
 
 #define PCI_BUS_COUNT 1
 
@@ -74,6 +75,11 @@ struct pci_bus {
 
     // Bitmap of the allocated device numbers
     uint8_t dev_map[MAX_BUS_DEVICES / 8];
+
+
+    int (*raise_pci_irq)(struct vm_device * dev, struct pci_device * pci_dev);
+    int (*lower_pci_irq)(struct vm_device * dev, struct pci_device * pci_dev);
+    struct vm_device * irq_bridge_dev;
 };
 
 
@@ -82,6 +88,9 @@ struct pci_internal {
     // Configuration address register
     struct pci_addr_reg addr_reg;
 
+    // Base IO Port which PCI devices will register with...
+    uint16_t dev_io_base; 
+
     // Attached Busses
     struct pci_bus bus_list[PCI_BUS_COUNT];
 };
@@ -376,23 +385,36 @@ static inline int is_cfg_reg_writable(uchar_t header_type, int reg_num) {
 static int bar_update(struct pci_device * pci, int bar_num, uint32_t new_val) {
     struct v3_pci_bar * bar = &(pci->bar[bar_num]);
 
-    PrintDebug("Updating BAR Register  (Dev=%s) (bar=%d) (old_val=%x) (new_val=%x)\n", 
+    PrintError("Updating BAR Register  (Dev=%s) (bar=%d) (old_val=0x%x) (new_val=0x%x)\n", 
               pci->name, bar_num, bar->val, new_val);
 
     switch (bar->type) {
        case PCI_BAR_IO: {
            int i = 0;
 
-               PrintDebug("\tRehooking %d IO ports from base %x to %x\n",
-                          bar->num_ports, PCI_IO_BASE(bar->val), PCI_IO_BASE(new_val));
+           PrintError("\tRehooking %d IO ports from base 0x%x to 0x%x for %d ports\n",
+                      bar->num_ports, PCI_IO_BASE(bar->val), PCI_IO_BASE(new_val),
+                      bar->num_ports);
                
            // only do this if pci device is enabled....
+           if (!(pci->config_header.status & 0x1)) {
+               PrintError("PCI Device IO space not enabled\n");
+           }
+
            for (i = 0; i < bar->num_ports; i++) {
 
+               PrintError("Rehooking PCI IO port (old port=%u) (new port=%u)\n",  
+                          PCI_IO_BASE(bar->val) + i, PCI_IO_BASE(new_val) + i);
+
                v3_dev_unhook_io(pci->vm_dev, PCI_IO_BASE(bar->val) + i);
 
-               v3_dev_hook_io(pci->vm_dev, PCI_IO_BASE(new_val) + i, 
-                              bar->io_read, bar->io_write);
+               if (v3_dev_hook_io(pci->vm_dev, PCI_IO_BASE(new_val) + i, 
+                                  bar->io_read, bar->io_write) == -1) {
+
+                   PrintError("Could not hook PCI IO port (old port=%u) (new port=%u)\n",  
+                              PCI_IO_BASE(bar->val) + i, PCI_IO_BASE(new_val) + i);
+                   return -1;
+               }
            }
 
            bar->val = new_val;
@@ -440,9 +462,10 @@ static int data_port_write(ushort_t port, void * src, uint_t length, struct vm_d
        return length;
     }
 
-    PrintDebug("Writing PCI Data register. bus = %d, dev = %d, reg = %d (%x) addr_reg = %x (val=%x, len=%d)\n", 
+    PrintDebug("Writing PCI Data register. bus = %d, dev = %d, fn = %d, reg = %d (%x) addr_reg = %x (val=%x, len=%d)\n", 
               pci_state->addr_reg.bus_num, 
               pci_state->addr_reg.dev_num, 
+              pci_state->addr_reg.fn_num,
               reg_num, reg_num, 
               pci_state->addr_reg.val,
               *(uint32_t *)src, length);
@@ -500,6 +523,8 @@ static int data_port_write(ushort_t port, void * src, uint_t length, struct vm_d
                // BIST update
                pci_dev->config_header.BIST = 0x00;
            }
+       } else {
+           PrintError("PCI Write to read only register %d\n", cur_reg);
        }
     }
 
@@ -609,6 +634,7 @@ static int pci_init(struct guest_info * vm, void * cfg_data) {
 
     
     pci_state->addr_reg.val = 0; 
+    pci_state->dev_io_base = PCI_DEV_IO_PORT_BASE;
 
     init_pci_busses(pci_state);
     
@@ -636,7 +662,12 @@ static inline int init_bars(struct pci_device * pci_dev) {
            int j = 0;
            pci_dev->bar[i].mask = (~((pci_dev->bar[i].num_ports) - 1)) | 0x01;
 
-           pci_dev->bar[i].val = pci_dev->bar[i].default_base_port & pci_dev->bar[i].mask;
+           if (pci_dev->bar[i].default_base_port != 0xffff) {
+               pci_dev->bar[i].val = pci_dev->bar[i].default_base_port & pci_dev->bar[i].mask;
+           } else {
+               pci_dev->bar[i].val = 0;
+           }
+
            pci_dev->bar[i].val |= 0x00000001;
 
            for (j = 0; j < pci_dev->bar[i].num_ports; j++) {
@@ -656,7 +687,11 @@ static inline int init_bars(struct pci_device * pci_dev) {
            pci_dev->bar[i].mask = ~((pci_dev->bar[i].num_pages << 12) - 1);
            pci_dev->bar[i].mask |= 0xf; // preserve the configuration flags
 
-           pci_dev->bar[i].val = pci_dev->bar[i].default_base_addr & pci_dev->bar[i].mask;
+           if (pci_dev->bar[i].default_base_addr != 0xffffffff) {
+               pci_dev->bar[i].val = pci_dev->bar[i].default_base_addr & pci_dev->bar[i].mask;
+           } else {
+               pci_dev->bar[i].val = 0;
+           }
 
            // hook memory
            if (pci_dev->bar[i].mem_read) {
@@ -698,6 +733,34 @@ static inline int init_bars(struct pci_device * pci_dev) {
 }
 
 
+int v3_pci_set_irq_bridge(struct  vm_device * pci_bus, int bus_num, 
+                         int (*raise_pci_irq)(struct vm_device * dev, struct pci_device * pci_dev),
+                         int (*lower_pci_irq)(struct vm_device * dev, struct pci_device * pci_dev),
+                         struct vm_device * bridge_dev) {
+    struct pci_internal * pci_state = (struct pci_internal *)pci_bus->private_data;
+
+
+    pci_state->bus_list[bus_num].raise_pci_irq = raise_pci_irq;
+    pci_state->bus_list[bus_num].lower_pci_irq = lower_pci_irq;
+    pci_state->bus_list[bus_num].irq_bridge_dev = bridge_dev;
+
+    return 0;
+}
+
+int v3_pci_raise_irq(struct vm_device * pci_bus, int bus_num, struct pci_device * dev) {
+   struct pci_internal * pci_state = (struct pci_internal *)pci_bus->private_data;
+   struct pci_bus * bus = &(pci_state->bus_list[bus_num]);
+
+   return bus->raise_pci_irq(bus->irq_bridge_dev, dev);
+}
+
+int v3_pci_lower_irq(struct vm_device * pci_bus, int bus_num, struct pci_device * dev) {
+   struct pci_internal * pci_state = (struct pci_internal *)pci_bus->private_data;
+   struct pci_bus * bus = &(pci_state->bus_list[bus_num]);
+
+   return bus->lower_pci_irq(bus->irq_bridge_dev, dev);
+}
+
 // if dev_num == -1, auto assign 
 struct pci_device * v3_pci_register_device(struct vm_device * pci,
                                           pci_device_type_t dev_type, 
@@ -779,7 +842,16 @@ struct pci_device * v3_pci_register_device(struct vm_device * pci,
 
        if (pci_dev->bar[i].type == PCI_BAR_IO) {
            pci_dev->bar[i].num_ports = bars[i].num_ports;
-           pci_dev->bar[i].default_base_port = bars[i].default_base_port;
+
+           // This is a horrible HACK becaues the BIOS is supposed to set the PCI base ports 
+           // And if the BIOS doesn't, Linux just happily overlaps device port assignments
+           if (bars[i].default_base_port != (uint16_t)-1) {
+               pci_dev->bar[i].default_base_port = bars[i].default_base_port;
+           } else {
+               pci_dev->bar[i].default_base_port = pci_state->dev_io_base;
+               pci_state->dev_io_base += ( 0x100 * ((bars[i].num_ports / 0x100) + 1) );
+           }
+
            pci_dev->bar[i].io_read = bars[i].io_read;
            pci_dev->bar[i].io_write = bars[i].io_write;
        } else if (pci_dev->bar[i].type == PCI_BAR_MEM32) {
@@ -809,6 +881,3 @@ struct pci_device * v3_pci_register_device(struct vm_device * pci,
 
     return pci_dev;
 }
-
-
-