On Tue, Jul 19, 2016 at 02:53:08PM +0200, Alexander Gordeev wrote:
> Cc: Thomas Huth <thuth@xxxxxxxxxx>
> Cc: Andrew Jones <drjones@xxxxxxxxxx>
> Reviewed-by: Andrew Jones <drjones@xxxxxxxxxx>
> Signed-off-by: Alexander Gordeev <agordeev@xxxxxxxxxx>
> ---
> lib/pci-testdev.c | 188 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
> lib/pci.h | 7 ++
> 2 files changed, 195 insertions(+)
> create mode 100644 lib/pci-testdev.c
>
> diff --git a/lib/pci-testdev.c b/lib/pci-testdev.c
> new file mode 100644
> index 000000000000..1ee4a3ca0df8
> --- /dev/null
> +++ b/lib/pci-testdev.c
> @@ -0,0 +1,188 @@
> +/*
> + * QEMU "pci-testdev" PCI test device
> + *
> + * Copyright (C) 2016, Red Hat Inc, Alexander Gordeev <agordeev@xxxxxxxxxx>
> + *
> + * This work is licensed under the terms of the GNU LGPL, version 2.
> + */
> +#include "pci.h"
> +#include "asm/io.h"
> +
> +struct pci_testdev_ops {
> + u8 (*io_readb)(const volatile void *addr);
> + u16 (*io_readw)(const volatile void *addr);
> + u32 (*io_readl)(const volatile void *addr);
> + void (*io_writeb)(u8 value, volatile void *addr);
> + void (*io_writew)(u16 value, volatile void *addr);
> + void (*io_writel)(u32 value, volatile void *addr);
> +};
> +
> +static u8 pio_readb(const volatile void *addr)
> +{
> + return inb((unsigned long)addr);
> +}
> +
> +static u16 pio_readw(const volatile void *addr)
> +{
> + return inw((unsigned long)addr);
> +}
> +
> +static u32 pio_readl(const volatile void *addr)
> +{
> + return inl((unsigned long)addr);
> +}
> +
> +static void pio_writeb(u8 value, volatile void *addr)
> +{
> + outb(value, (unsigned long)addr);
> +}
> +
> +static void pio_writew(u16 value, volatile void *addr)
> +{
> + outw(value, (unsigned long)addr);
> +}
> +
> +static void pio_writel(u32 value, volatile void *addr)
> +{
> + outl(value, (unsigned long)addr);
> +}
> +
> +static struct pci_testdev_ops pci_testdev_io_ops = {
> + .io_readb = pio_readb,
> + .io_readw = pio_readw,
> + .io_readl = pio_readl,
> + .io_writeb = pio_writeb,
> + .io_writew = pio_writew,
> + .io_writel = pio_writel
> +};
> +
> +static u8 mmio_readb(const volatile void *addr)
> +{
> + return *(const volatile u8 __force *)addr;
> +}
> +
> +static u16 mmio_readw(const volatile void *addr)
> +{
> + return *(const volatile u16 __force *)addr;
> +}
> +
> +static u32 mmio_readl(const volatile void *addr)
> +{
> + return *(const volatile u32 __force *)addr;
> +}
> +
> +static void mmio_writeb(u8 value, volatile void *addr)
> +{
> + *(volatile u8 __force *)addr = value;
> +}
> +
> +static void mmio_writew(u16 value, volatile void *addr)
> +{
> + *(volatile u16 __force *)addr = value;
> +}
> +
> +static void mmio_writel(u32 value, volatile void *addr)
> +{
> + *(volatile u32 __force *)addr = value;
> +}
> +
> +static struct pci_testdev_ops pci_testdev_mem_ops = {
> + .io_readb = mmio_readb,
> + .io_readw = mmio_readw,
> + .io_readl = mmio_readl,
> + .io_writeb = mmio_writeb,
> + .io_writew = mmio_writew,
> + .io_writel = mmio_writel
> +};
> +
> +static bool pci_testdev_one(struct pci_test_dev_hdr *test,
> + int test_nr,
> + struct pci_testdev_ops *ops)
> +{
> + u8 width;
> + u32 count, sig, off;
> + const int nr_writes = 16;
> + int i;
> +
> + ops->io_writeb(test_nr, &test->test);
> + count = ops->io_readl(&test->count);
> + if (count != 0)
> + return false;
> +
> + width = ops->io_readb(&test->width);
> + if (width != 1 && width != 2 && width != 4)
> + return false;
> +
> + sig = ops->io_readl(&test->data);
> + off = ops->io_readl(&test->offset);
> +
> + for (i = 0; i < nr_writes; i++) {
> + switch (width) {
> + case 1: ops->io_writeb(sig, (void *)test + off); break;
> + case 2: ops->io_writew(sig, (void *)test + off); break;
> + case 4: ops->io_writel(sig, (void *)test + off); break;
> + }
> + }
> +
> + count = ops->io_readl(&test->count);
> + if (!count)
> + return true;
> +
> + return (int)count == nr_writes;
> +}
> +
> +void pci_testdev_print(struct pci_test_dev_hdr *test,
> + struct pci_testdev_ops *ops)
> +{
> + bool io = (ops == &pci_testdev_io_ops);
> + int i;
> +
> + printf("pci-testdev %3s: ", io ? "io" : "mem");
> + for (i = 0;; ++i) {
> + char c = ops->io_readb(&test->name[i]);
> + if (!c)
> + break;
> + printf("%c", c);
> + }
> + printf("\n");
> +}
> +
> +static int pci_testdev_all(struct pci_test_dev_hdr *test,
> + struct pci_testdev_ops *ops)
> +{
> + int i;
> +
> + for (i = 0;; i++) {
> + if (!pci_testdev_one(test, i, ops))
> + break;
> + pci_testdev_print(test, ops);
> + }
> +
> + return i;
> +}
> +
> +int pci_testdev(void)
> +{
> + phys_addr_t addr;
> + void __iomem *mem, *io;
> + pcidevaddr_t dev;
> + int nr_tests = 0;
> +
> + dev = pci_find_dev(PCI_VENDOR_ID_REDHAT, PCI_DEVICE_ID_REDHAT_TEST);
> + if (dev == PCIDEVADDR_INVALID)
You should output an error message here, saying it's not found. You could
suggest how to provide it, i.e. '-device pci-testdev' too.
> + return -1;
> +
> + if (!pci_bar_is_valid(dev, 0) || !pci_bar_is_valid(dev, 1))
Needs error message. Actually, why can this happen? Can it? Shouldn't
this just be an assert?
> + return -1;
> +
> + addr = pci_bar_get_addr(dev, 0);
> + mem = ioremap(addr, PAGE_SIZE);
> +
> + addr = pci_bar_get_addr(dev, 1);
> + io = (void *)(unsigned long)addr;
> +
> + nr_tests += pci_testdev_all(mem, &pci_testdev_mem_ops);
> + nr_tests += pci_testdev_all(io, &pci_testdev_io_ops);
> +
> + return nr_tests;
> +}
> diff --git a/lib/pci.h b/lib/pci.h
> index e00e1471d80a..5afe87a66998 100644
> --- a/lib/pci.h
> +++ b/lib/pci.h
> @@ -40,6 +40,8 @@ bool pci_bar_is64(pcidevaddr_t dev, int bar_num);
> bool pci_bar_is_memory(pcidevaddr_t dev, int bar_num);
> bool pci_bar_is_valid(pcidevaddr_t dev, int bar_num);
>
> +int pci_testdev(void);
> +
> /*
> * pci-testdev is a driver for the pci-testdev qemu pci device. The
> * device enables testing mmio and portio exits, and measuring their
> @@ -48,7 +50,12 @@ bool pci_bar_is_valid(pcidevaddr_t dev, int bar_num);
> #define PCI_VENDOR_ID_REDHAT 0x1b36
> #define PCI_DEVICE_ID_REDHAT_TEST 0x0005
>
> +/*
> + * pci-testdev supports at least three types of tests (via mmio and
> + * portio BARs): no-eventfd, wildcard-eventfd and datamatch-eventfd
> + */
> #define PCI_TESTDEV_NUM_BARS 2
> +#define PCI_TESTDEV_NUM_TESTS 3
>
> struct pci_test_dev_hdr {
> uint8_t test;
> --
> 1.8.3.1
>
> --
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