To extend current PCI framework, we need a per-device struct to store
device specific information. Time to have a pci_dev struct. Most of the
current PCI APIs are converted to use this pci_dev object as the first
argument. Currently it only contains one field "bdf", which is the bdf
of current device.
For a few APIs like pci_config_*() ops or pci_find_dev(), I kept the old
interface (use PCI BDF value rather than "struct pci_dev") since they
can be used in a open context that without any specific PCI device.
Reviewed-by: Andrew Jones <drjones@xxxxxxxxxx>
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
---
lib/pci-host-generic.c | 17 ++++++++-------
lib/pci-testdev.c | 10 +++++----
lib/pci.c | 56 ++++++++++++++++++++++++++++++--------------------
lib/pci.h | 24 ++++++++++++++--------
x86/vmexit.c | 18 ++++++++--------
5 files changed, 76 insertions(+), 49 deletions(-)
diff --git a/lib/pci-host-generic.c b/lib/pci-host-generic.c
index 6ac0f15..958ef70 100644
--- a/lib/pci-host-generic.c
+++ b/lib/pci-host-generic.c
@@ -165,7 +165,7 @@ static struct pci_host_bridge *pci_dt_probe(void)
return host;
}
-static bool pci_alloc_resource(pcidevaddr_t dev, int bar_num, u64 *addr)
+static bool pci_alloc_resource(struct pci_dev *dev, int bar_num, u64 *addr)
{
struct pci_host_bridge *host = pci_host_bridge;
struct pci_addr_space *as = &host->addr_space[0];
@@ -192,7 +192,7 @@ static bool pci_alloc_resource(pcidevaddr_t dev, int bar_num, u64 *addr)
if (i >= host->nr_addr_spaces) {
printf("%s: warning: can't satisfy request for ", __func__);
- pci_dev_print_id(dev);
+ pci_dev_print_id(dev->bdf);
printf(" ");
pci_bar_print(dev, bar_num);
printf("\n");
@@ -211,6 +211,7 @@ static bool pci_alloc_resource(pcidevaddr_t dev, int bar_num, u64 *addr)
bool pci_probe(void)
{
+ struct pci_dev pci_dev;
pcidevaddr_t dev;
u8 header;
u32 cmd;
@@ -221,10 +222,12 @@ bool pci_probe(void)
if (!pci_host_bridge)
return false;
- for (dev = 0; dev < 256; dev++) {
+ for (dev = 0; dev < PCI_DEVFN_MAX; dev++) {
if (!pci_dev_exists(dev))
continue;
+ pci_dev_init(&pci_dev, dev);
+
/* We are only interested in normal PCI devices */
header = pci_config_readb(dev, PCI_HEADER_TYPE);
if ((header & PCI_HEADER_TYPE_MASK) != PCI_HEADER_TYPE_NORMAL)
@@ -235,16 +238,16 @@ bool pci_probe(void)
for (i = 0; i < 6; i++) {
u64 addr;
- if (pci_alloc_resource(dev, i, &addr)) {
- pci_bar_set_addr(dev, i, addr);
+ if (pci_alloc_resource(&pci_dev, i, &addr)) {
+ pci_bar_set_addr(&pci_dev, i, addr);
- if (pci_bar_is_memory(dev, i))
+ if (pci_bar_is_memory(&pci_dev, i))
cmd |= PCI_COMMAND_MEMORY;
else
cmd |= PCI_COMMAND_IO;
}
- if (pci_bar_is64(dev, i))
+ if (pci_bar_is64(&pci_dev, i))
i++;
}
diff --git a/lib/pci-testdev.c b/lib/pci-testdev.c
index ad482d3..7d298e6 100644
--- a/lib/pci-testdev.c
+++ b/lib/pci-testdev.c
@@ -163,9 +163,10 @@ static int pci_testdev_all(struct pci_test_dev_hdr *test,
int pci_testdev(void)
{
+ struct pci_dev pci_dev;
+ pcidevaddr_t dev;
phys_addr_t addr;
void __iomem *mem, *io;
- pcidevaddr_t dev;
int nr_tests = 0;
bool ret;
@@ -175,14 +176,15 @@ int pci_testdev(void)
"check QEMU '-device pci-testdev' parameter\n");
return -1;
}
+ pci_dev_init(&pci_dev, dev);
- ret = pci_bar_is_valid(dev, 0) && pci_bar_is_valid(dev, 1);
+ ret = pci_bar_is_valid(&pci_dev, 0) && pci_bar_is_valid(&pci_dev, 1);
assert(ret);
- addr = pci_bar_get_addr(dev, 0);
+ addr = pci_bar_get_addr(&pci_dev, 0);
mem = ioremap(addr, PAGE_SIZE);
- addr = pci_bar_get_addr(dev, 1);
+ addr = pci_bar_get_addr(&pci_dev, 1);
io = (void *)(unsigned long)addr;
nr_tests += pci_testdev_all(mem, &pci_testdev_mem_ops);
diff --git a/lib/pci.c b/lib/pci.c
index 6bd54cb..8f2356d 100644
--- a/lib/pci.c
+++ b/lib/pci.c
@@ -13,12 +13,18 @@ bool pci_dev_exists(pcidevaddr_t dev)
pci_config_readw(dev, PCI_DEVICE_ID) != 0xffff);
}
+void pci_dev_init(struct pci_dev *dev, pcidevaddr_t bdf)
+{
+ memset(dev, 0, sizeof(*dev));
+ dev->bdf = bdf;
+}
+
/* Scan bus look for a specific device. Only bus 0 scanned for now. */
pcidevaddr_t pci_find_dev(uint16_t vendor_id, uint16_t device_id)
{
pcidevaddr_t dev;
- for (dev = 0; dev < 256; ++dev) {
+ for (dev = 0; dev < PCI_DEVFN_MAX; ++dev) {
if (pci_config_readw(dev, PCI_VENDOR_ID) == vendor_id &&
pci_config_readw(dev, PCI_DEVICE_ID) == device_id)
return dev;
@@ -33,12 +39,13 @@ uint32_t pci_bar_mask(uint32_t bar)
PCI_BASE_ADDRESS_IO_MASK : PCI_BASE_ADDRESS_MEM_MASK;
}
-uint32_t pci_bar_get(pcidevaddr_t dev, int bar_num)
+uint32_t pci_bar_get(struct pci_dev *dev, int bar_num)
{
- return pci_config_readl(dev, PCI_BASE_ADDRESS_0 + bar_num * 4);
+ return pci_config_readl(dev->bdf, PCI_BASE_ADDRESS_0 +
+ bar_num * 4);
}
-phys_addr_t pci_bar_get_addr(pcidevaddr_t dev, int bar_num)
+phys_addr_t pci_bar_get_addr(struct pci_dev *dev, int bar_num)
{
uint32_t bar = pci_bar_get(dev, bar_num);
uint32_t mask = pci_bar_mask(bar);
@@ -47,17 +54,18 @@ phys_addr_t pci_bar_get_addr(pcidevaddr_t dev, int bar_num)
if (pci_bar_is64(dev, bar_num))
addr |= (uint64_t)pci_bar_get(dev, bar_num + 1) << 32;
- return pci_translate_addr(dev, addr);
+ return pci_translate_addr(dev->bdf, addr);
}
-void pci_bar_set_addr(pcidevaddr_t dev, int bar_num, phys_addr_t addr)
+void pci_bar_set_addr(struct pci_dev *dev, int bar_num, phys_addr_t addr)
{
int off = PCI_BASE_ADDRESS_0 + bar_num * 4;
- pci_config_writel(dev, off, (uint32_t)addr);
+ pci_config_writel(dev->bdf, off, (uint32_t)addr);
if (pci_bar_is64(dev, bar_num))
- pci_config_writel(dev, off + 4, (uint32_t)(addr >> 32));
+ pci_config_writel(dev->bdf, off + 4,
+ (uint32_t)(addr >> 32));
}
/*
@@ -70,20 +78,21 @@ void pci_bar_set_addr(pcidevaddr_t dev, int bar_num, phys_addr_t addr)
* The following pci_bar_size_helper() and pci_bar_size() functions
* implement the algorithm.
*/
-static uint32_t pci_bar_size_helper(pcidevaddr_t dev, int bar_num)
+static uint32_t pci_bar_size_helper(struct pci_dev *dev, int bar_num)
{
int off = PCI_BASE_ADDRESS_0 + bar_num * 4;
+ uint16_t bdf = dev->bdf;
uint32_t bar, val;
- bar = pci_config_readl(dev, off);
- pci_config_writel(dev, off, ~0u);
- val = pci_config_readl(dev, off);
- pci_config_writel(dev, off, bar);
+ bar = pci_config_readl(bdf, off);
+ pci_config_writel(bdf, off, ~0u);
+ val = pci_config_readl(bdf, off);
+ pci_config_writel(bdf, off, bar);
return val;
}
-phys_addr_t pci_bar_size(pcidevaddr_t dev, int bar_num)
+phys_addr_t pci_bar_size(struct pci_dev *dev, int bar_num)
{
uint32_t bar, size;
@@ -104,19 +113,19 @@ phys_addr_t pci_bar_size(pcidevaddr_t dev, int bar_num)
}
}
-bool pci_bar_is_memory(pcidevaddr_t dev, int bar_num)
+bool pci_bar_is_memory(struct pci_dev *dev, int bar_num)
{
uint32_t bar = pci_bar_get(dev, bar_num);
return !(bar & PCI_BASE_ADDRESS_SPACE_IO);
}
-bool pci_bar_is_valid(pcidevaddr_t dev, int bar_num)
+bool pci_bar_is_valid(struct pci_dev *dev, int bar_num)
{
return pci_bar_get(dev, bar_num);
}
-bool pci_bar_is64(pcidevaddr_t dev, int bar_num)
+bool pci_bar_is64(struct pci_dev *dev, int bar_num)
{
uint32_t bar = pci_bar_get(dev, bar_num);
@@ -127,7 +136,7 @@ bool pci_bar_is64(pcidevaddr_t dev, int bar_num)
PCI_BASE_ADDRESS_MEM_TYPE_64;
}
-void pci_bar_print(pcidevaddr_t dev, int bar_num)
+void pci_bar_print(struct pci_dev *dev, int bar_num)
{
phys_addr_t size, start, end;
uint32_t bar;
@@ -186,8 +195,11 @@ static void pci_dev_print(pcidevaddr_t dev)
uint8_t progif = pci_config_readb(dev, PCI_CLASS_PROG);
uint8_t subclass = pci_config_readb(dev, PCI_CLASS_DEVICE);
uint8_t class = pci_config_readb(dev, PCI_CLASS_DEVICE + 1);
+ struct pci_dev pci_dev;
int i;
+ pci_dev_init(&pci_dev, dev);
+
pci_dev_print_id(dev);
printf(" type %02x progif %02x class %02x subclass %02x\n",
header, progif, class, subclass);
@@ -196,12 +208,12 @@ static void pci_dev_print(pcidevaddr_t dev)
return;
for (i = 0; i < 6; i++) {
- if (pci_bar_size(dev, i)) {
+ if (pci_bar_size(&pci_dev, i)) {
printf("\t");
- pci_bar_print(dev, i);
+ pci_bar_print(&pci_dev, i);
printf("\n");
}
- if (pci_bar_is64(dev, i))
+ if (pci_bar_is64(&pci_dev, i))
i++;
}
}
@@ -210,7 +222,7 @@ void pci_print(void)
{
pcidevaddr_t dev;
- for (dev = 0; dev < 256; ++dev) {
+ for (dev = 0; dev < PCI_DEVFN_MAX; ++dev) {
if (pci_dev_exists(dev))
pci_dev_print(dev);
}
diff --git a/lib/pci.h b/lib/pci.h
index 86d6b42..355acd0 100644
--- a/lib/pci.h
+++ b/lib/pci.h
@@ -15,6 +15,14 @@ enum {
PCIDEVADDR_INVALID = 0xffff,
};
+#define PCI_DEVFN_MAX 256
+
+struct pci_dev {
+ uint16_t bdf;
+};
+
+extern void pci_dev_init(struct pci_dev *dev, pcidevaddr_t bdf);
+
extern bool pci_probe(void);
extern void pci_print(void);
extern bool pci_dev_exists(pcidevaddr_t dev);
@@ -32,15 +40,15 @@ extern pcidevaddr_t pci_find_dev(uint16_t vendor_id, uint16_t device_id);
* It is expected the caller is aware of the device BAR layout and never
* tries to address the middle of a 64-bit register.
*/
-extern phys_addr_t pci_bar_get_addr(pcidevaddr_t dev, int bar_num);
-extern void pci_bar_set_addr(pcidevaddr_t dev, int bar_num, phys_addr_t addr);
-extern phys_addr_t pci_bar_size(pcidevaddr_t dev, int bar_num);
-extern uint32_t pci_bar_get(pcidevaddr_t dev, int bar_num);
+extern phys_addr_t pci_bar_get_addr(struct pci_dev *dev, int bar_num);
+extern void pci_bar_set_addr(struct pci_dev *dev, int bar_num, phys_addr_t addr);
+extern phys_addr_t pci_bar_size(struct pci_dev *dev, int bar_num);
+extern uint32_t pci_bar_get(struct pci_dev *dev, int bar_num);
extern uint32_t pci_bar_mask(uint32_t bar);
-extern bool pci_bar_is64(pcidevaddr_t dev, int bar_num);
-extern bool pci_bar_is_memory(pcidevaddr_t dev, int bar_num);
-extern bool pci_bar_is_valid(pcidevaddr_t dev, int bar_num);
-extern void pci_bar_print(pcidevaddr_t dev, int bar_num);
+extern bool pci_bar_is64(struct pci_dev *dev, int bar_num);
+extern bool pci_bar_is_memory(struct pci_dev *dev, int bar_num);
+extern bool pci_bar_is_valid(struct pci_dev *dev, int bar_num);
+extern void pci_bar_print(struct pci_dev *dev, int bar_num);
extern void pci_dev_print_id(pcidevaddr_t dev);
extern int pci_testdev(void);
diff --git a/x86/vmexit.c b/x86/vmexit.c
index 2d99d5f..63fa070 100644
--- a/x86/vmexit.c
+++ b/x86/vmexit.c
@@ -372,7 +372,8 @@ int main(int ac, char **av)
struct fadt_descriptor_rev1 *fadt;
int i;
unsigned long membar = 0;
- pcidevaddr_t pcidev;
+ struct pci_dev pcidev;
+ int ret;
smp_init();
setup_vm();
@@ -385,21 +386,22 @@ int main(int ac, char **av)
pm_tmr_blk = fadt->pm_tmr_blk;
printf("PM timer port is %x\n", pm_tmr_blk);
- pcidev = pci_find_dev(PCI_VENDOR_ID_REDHAT, PCI_DEVICE_ID_REDHAT_TEST);
- if (pcidev != PCIDEVADDR_INVALID) {
+ ret = pci_find_dev(PCI_VENDOR_ID_REDHAT, PCI_DEVICE_ID_REDHAT_TEST);
+ if (ret != PCIDEVADDR_INVALID) {
+ pci_dev_init(&pcidev, ret);
for (i = 0; i < PCI_TESTDEV_NUM_BARS; i++) {
- if (!pci_bar_is_valid(pcidev, i)) {
+ if (!pci_bar_is_valid(&pcidev, i)) {
continue;
}
- if (pci_bar_is_memory(pcidev, i)) {
- membar = pci_bar_get_addr(pcidev, i);
+ if (pci_bar_is_memory(&pcidev, i)) {
+ membar = pci_bar_get_addr(&pcidev, i);
pci_test.memaddr = ioremap(membar, PAGE_SIZE);
} else {
- pci_test.iobar = pci_bar_get_addr(pcidev, i);
+ pci_test.iobar = pci_bar_get_addr(&pcidev, i);
}
}
printf("pci-testdev at 0x%x membar %lx iobar %x\n",
- pcidev, membar, pci_test.iobar);
+ pcidev.bdf, membar, pci_test.iobar);
}
for (i = 0; i < ARRAY_SIZE(tests); ++i)
--
2.7.4
--
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