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Merge commit 'mst/pci' into staging

This commit is contained in:
Anthony Liguori 2009-12-07 14:31:38 -06:00
parent a3a55a2edb b6981cb57b
commit ad382a1257
3 changed files with 179 additions and 43 deletions
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74
hw/msix.c
View File

@ -20,6 +20,7 @@
#define PCI_MSIX_FLAGS 2 /* Table at lower 11 bits */
#define PCI_MSIX_FLAGS_QSIZE 0x7FF
#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
#define PCI_MSIX_FLAGS_MASKALL (1 << 14)
#define PCI_MSIX_FLAGS_BIRMASK (7 << 0)
/* MSI-X capability structure */
@ -27,9 +28,10 @@
#define MSIX_PBA_OFFSET 8
#define MSIX_CAP_LENGTH 12
/* MSI enable bit is in byte 1 in FLAGS register */
#define MSIX_ENABLE_OFFSET (PCI_MSIX_FLAGS + 1)
/* MSI enable bit and maskall bit are in byte 1 in FLAGS register */
#define MSIX_CONTROL_OFFSET (PCI_MSIX_FLAGS + 1)
#define MSIX_ENABLE_MASK (PCI_MSIX_FLAGS_ENABLE >> 8)
#define MSIX_MASKALL_MASK (PCI_MSIX_FLAGS_MASKALL >> 8)
/* MSI-X table format */
#define MSIX_MSG_ADDR 0
@ -101,22 +103,11 @@ static int msix_add_config(struct PCIDevice *pdev, unsigned short nentries,
bar_nr);
pdev->msix_cap = config_offset;
/* Make flags bit writeable. */
pdev->wmask[config_offset + MSIX_ENABLE_OFFSET] |= MSIX_ENABLE_MASK;
pdev->wmask[config_offset + MSIX_CONTROL_OFFSET] |= MSIX_ENABLE_MASK |
MSIX_MASKALL_MASK;
return 0;
}
/* Handle MSI-X capability config write. */
void msix_write_config(PCIDevice *dev, uint32_t addr,
uint32_t val, int len)
{
unsigned enable_pos = dev->msix_cap + MSIX_ENABLE_OFFSET;
if (addr + len <= enable_pos || addr > enable_pos)
return;
if (msix_enabled(dev))
qemu_set_irq(dev->irq[0], 0);
}
static uint32_t msix_mmio_readl(void *opaque, target_phys_addr_t addr)
{
PCIDevice *dev = opaque;
@ -157,10 +148,50 @@ static void msix_clr_pending(PCIDevice *dev, int vector)
*msix_pending_byte(dev, vector) &= ~msix_pending_mask(vector);
}
static int msix_function_masked(PCIDevice *dev)
{
return dev->config[dev->msix_cap + MSIX_CONTROL_OFFSET] & MSIX_MASKALL_MASK;
}
static int msix_is_masked(PCIDevice *dev, int vector)
{
unsigned offset = vector * MSIX_ENTRY_SIZE + MSIX_VECTOR_CTRL;
return dev->msix_table_page[offset] & MSIX_VECTOR_MASK;
return msix_function_masked(dev) ||
dev->msix_table_page[offset] & MSIX_VECTOR_MASK;
}
static void msix_handle_mask_update(PCIDevice *dev, int vector)
{
if (!msix_is_masked(dev, vector) && msix_is_pending(dev, vector)) {
msix_clr_pending(dev, vector);
msix_notify(dev, vector);
}
}
/* Handle MSI-X capability config write. */
void msix_write_config(PCIDevice *dev, uint32_t addr,
uint32_t val, int len)
{
unsigned enable_pos = dev->msix_cap + MSIX_CONTROL_OFFSET;
int vector;
if (addr + len <= enable_pos || addr > enable_pos) {
return;
}
if (!msix_enabled(dev)) {
return;
}
qemu_set_irq(dev->irq[0], 0);
if (msix_function_masked(dev)) {
return;
}
for (vector = 0; vector < dev->msix_entries_nr; ++vector) {
msix_handle_mask_update(dev, vector);
}
}
static void msix_mmio_writel(void *opaque, target_phys_addr_t addr,
@ -170,10 +201,7 @@ static void msix_mmio_writel(void *opaque, target_phys_addr_t addr,
unsigned int offset = addr & (MSIX_PAGE_SIZE - 1) & ~0x3;
int vector = offset / MSIX_ENTRY_SIZE;
pci_set_long(dev->msix_table_page + offset, val);
if (!msix_is_masked(dev, vector) && msix_is_pending(dev, vector)) {
msix_clr_pending(dev, vector);
msix_notify(dev, vector);
}
msix_handle_mask_update(dev, vector);
}
static void msix_mmio_write_unallowed(void *opaque, target_phys_addr_t addr,
@ -327,7 +355,7 @@ int msix_present(PCIDevice *dev)
int msix_enabled(PCIDevice *dev)
{
return (dev->cap_present & QEMU_PCI_CAP_MSIX) &&
(dev->config[dev->msix_cap + MSIX_ENABLE_OFFSET] &
(dev->config[dev->msix_cap + MSIX_CONTROL_OFFSET] &
MSIX_ENABLE_MASK);
}
@ -363,8 +391,8 @@ void msix_reset(PCIDevice *dev)
if (!(dev->cap_present & QEMU_PCI_CAP_MSIX))
return;
msix_free_irq_entries(dev);
dev->config[dev->msix_cap + MSIX_ENABLE_OFFSET] &=
~dev->wmask[dev->msix_cap + MSIX_ENABLE_OFFSET];
dev->config[dev->msix_cap + MSIX_CONTROL_OFFSET] &=
~dev->wmask[dev->msix_cap + MSIX_CONTROL_OFFSET];
memset(dev->msix_table_page, 0, MSIX_PAGE_SIZE);
msix_mask_all(dev, dev->msix_entries_nr);
}

144
hw/pci.c
View File

@ -103,11 +103,48 @@ static int pci_bar(PCIDevice *d, int reg)
return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS;
}
static inline int pci_irq_state(PCIDevice *d, int irq_num)
{
return (d->irq_state >> irq_num) & 0x1;
}
static inline void pci_set_irq_state(PCIDevice *d, int irq_num, int level)
{
d->irq_state &= ~(0x1 << irq_num);
d->irq_state |= level << irq_num;
}
static void pci_change_irq_level(PCIDevice *pci_dev, int irq_num, int change)
{
PCIBus *bus;
for (;;) {
bus = pci_dev->bus;
irq_num = bus->map_irq(pci_dev, irq_num);
if (bus->set_irq)
break;
pci_dev = bus->parent_dev;
}
bus->irq_count[irq_num] += change;
bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
}
/* Update interrupt status bit in config space on interrupt
* state change. */
static void pci_update_irq_status(PCIDevice *dev)
{
if (dev->irq_state) {
dev->config[PCI_STATUS] |= PCI_STATUS_INTERRUPT;
} else {
dev->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT;
}
}
static void pci_device_reset(PCIDevice *dev)
{
int r;
memset(dev->irq_state, 0, sizeof dev->irq_state);
dev->irq_state = 0;
pci_update_irq_status(dev);
dev->config[PCI_COMMAND] &= ~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER);
dev->config[PCI_CACHE_LINE_SIZE] = 0x0;
@ -274,6 +311,43 @@ static VMStateInfo vmstate_info_pci_config = {
.put = put_pci_config_device,
};
static int get_pci_irq_state(QEMUFile *f, void *pv, size_t size)
{
PCIDevice *s = container_of(pv, PCIDevice, config);
uint32_t irq_state[PCI_NUM_PINS];
int i;
for (i = 0; i < PCI_NUM_PINS; ++i) {
irq_state[i] = qemu_get_be32(f);
if (irq_state[i] != 0x1 && irq_state[i] != 0) {
fprintf(stderr, "irq state %d: must be 0 or 1.\n",
irq_state[i]);
return -EINVAL;
}
}
for (i = 0; i < PCI_NUM_PINS; ++i) {
pci_set_irq_state(s, i, irq_state[i]);
}
return 0;
}
static void put_pci_irq_state(QEMUFile *f, void *pv, size_t size)
{
int i;
PCIDevice *s = container_of(pv, PCIDevice, config);
for (i = 0; i < PCI_NUM_PINS; ++i) {
qemu_put_be32(f, pci_irq_state(s, i));
}
}
static VMStateInfo vmstate_info_pci_irq_state = {
.name = "pci irq state",
.get = get_pci_irq_state,
.put = put_pci_irq_state,
};
const VMStateDescription vmstate_pci_device = {
.name = "PCIDevice",
.version_id = 2,
@ -284,7 +358,9 @@ const VMStateDescription vmstate_pci_device = {
VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0,
vmstate_info_pci_config,
PCI_CONFIG_SPACE_SIZE),
VMSTATE_INT32_ARRAY_V(irq_state, PCIDevice, PCI_NUM_PINS, 2),
VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
vmstate_info_pci_irq_state,
PCI_NUM_PINS * sizeof(int32_t)),
VMSTATE_END_OF_LIST()
}
};
@ -299,7 +375,9 @@ const VMStateDescription vmstate_pcie_device = {
VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0,
vmstate_info_pci_config,
PCIE_CONFIG_SPACE_SIZE),
VMSTATE_INT32_ARRAY_V(irq_state, PCIDevice, PCI_NUM_PINS, 2),
VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
vmstate_info_pci_irq_state,
PCI_NUM_PINS * sizeof(int32_t)),
VMSTATE_END_OF_LIST()
}
};
@ -311,12 +389,23 @@ static inline const VMStateDescription *pci_get_vmstate(PCIDevice *s)
void pci_device_save(PCIDevice *s, QEMUFile *f)
{
/* Clear interrupt status bit: it is implicit
* in irq_state which we are saving.
* This makes us compatible with old devices
* which never set or clear this bit. */
s->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT;
vmstate_save_state(f, pci_get_vmstate(s), s);
/* Restore the interrupt status bit. */
pci_update_irq_status(s);
}
int pci_device_load(PCIDevice *s, QEMUFile *f)
{
return vmstate_load_state(f, pci_get_vmstate(s), s, s->version_id);
int ret;
ret = vmstate_load_state(f, pci_get_vmstate(s), s, s->version_id);
/* Restore the interrupt status bit. */
pci_update_irq_status(s);
return ret;
}
static int pci_set_default_subsystem_id(PCIDevice *pci_dev)
@ -429,7 +518,8 @@ static void pci_init_wmask(PCIDevice *dev)
dev->wmask[PCI_CACHE_LINE_SIZE] = 0xff;
dev->wmask[PCI_INTERRUPT_LINE] = 0xff;
pci_set_word(dev->wmask + PCI_COMMAND,
PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
PCI_COMMAND_INTX_DISABLE);
memset(dev->wmask + PCI_CONFIG_HEADER_SIZE, 0xff,
config_size - PCI_CONFIG_HEADER_SIZE);
@ -499,7 +589,7 @@ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus,
pci_dev->bus = bus;
pci_dev->devfn = devfn;
pstrcpy(pci_dev->name, sizeof(pci_dev->name), name);
memset(pci_dev->irq_state, 0, sizeof(pci_dev->irq_state));
pci_dev->irq_state = 0;
pci_config_alloc(pci_dev);
header_type &= ~PCI_HEADER_TYPE_MULTI_FUNCTION;
@ -849,6 +939,25 @@ static void pci_update_mappings(PCIDevice *d)
}
}
static inline int pci_irq_disabled(PCIDevice *d)
{
return pci_get_word(d->config + PCI_COMMAND) & PCI_COMMAND_INTX_DISABLE;
}
/* Called after interrupt disabled field update in config space,
* assert/deassert interrupts if necessary.
* Gets original interrupt disable bit value (before update). */
static void pci_update_irq_disabled(PCIDevice *d, int was_irq_disabled)
{
int i, disabled = pci_irq_disabled(d);
if (disabled == was_irq_disabled)
return;
for (i = 0; i < PCI_NUM_PINS; ++i) {
int state = pci_irq_state(d, i);
pci_change_irq_level(d, i, disabled ? -state : state);
}
}
uint32_t pci_default_read_config(PCIDevice *d,
uint32_t address, int len)
{
@ -861,7 +970,7 @@ uint32_t pci_default_read_config(PCIDevice *d,
void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l)
{
int i;
int i, was_irq_disabled = pci_irq_disabled(d);
uint32_t config_size = pci_config_size(d);
for (i = 0; i < l && addr + i < config_size; val >>= 8, ++i) {
@ -873,6 +982,9 @@ void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l)
ranges_overlap(addr, l, PCI_ROM_ADDRESS1, 4) ||
range_covers_byte(addr, l, PCI_COMMAND))
pci_update_mappings(d);
if (range_covers_byte(addr, l, PCI_COMMAND))
pci_update_irq_disabled(d, was_irq_disabled);
}
/***********************************************************/
@ -882,23 +994,17 @@ void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l)
static void pci_set_irq(void *opaque, int irq_num, int level)
{
PCIDevice *pci_dev = opaque;
PCIBus *bus;
int change;
change = level - pci_dev->irq_state[irq_num];
change = level - pci_irq_state(pci_dev, irq_num);
if (!change)
return;
pci_dev->irq_state[irq_num] = level;
for (;;) {
bus = pci_dev->bus;
irq_num = bus->map_irq(pci_dev, irq_num);
if (bus->set_irq)
break;
pci_dev = bus->parent_dev;
}
bus->irq_count[irq_num] += change;
bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
pci_set_irq_state(pci_dev, irq_num, level);
pci_update_irq_status(pci_dev);
if (pci_irq_disabled(pci_dev))
return;
pci_change_irq_level(pci_dev, irq_num, change);
}
/***********************************************************/

4
hw/pci.h
View File

@ -101,7 +101,9 @@ typedef struct PCIIORegion {
#define PCI_COMMAND_IO 0x1 /* Enable response in I/O space */
#define PCI_COMMAND_MEMORY 0x2 /* Enable response in Memory space */
#define PCI_COMMAND_MASTER 0x4 /* Enable bus master */
#define PCI_COMMAND_INTX_DISABLE 0x400 /* INTx Emulation Disable */
#define PCI_STATUS 0x06 /* 16 bits */
#define PCI_STATUS_INTERRUPT 0x08
#define PCI_REVISION_ID 0x08 /* 8 bits */
#define PCI_CLASS_PROG 0x09 /* Reg. Level Programming Interface */
#define PCI_CLASS_DEVICE 0x0a /* Device class */
@ -220,7 +222,7 @@ struct PCIDevice {
qemu_irq *irq;
/* Current IRQ levels. Used internally by the generic PCI code. */
int irq_state[PCI_NUM_PINS];
uint8_t irq_state;
/* Capability bits */
uint32_t cap_present;