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[Qemu-devel] Re: [PATCH] pcie: add flr support
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] Re: [PATCH] pcie: add flr support |
Date: |
Wed, 22 Dec 2010 08:38:52 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, Dec 22, 2010 at 03:14:35PM +0900, Isaku Yamahata wrote:
> support flr.
>
> Signed-off-by: Isaku Yamahata <address@hidden>
Applied.
> ---
> hw/pci.c | 6 +++++-
> hw/pci.h | 1 +
> hw/pcie.c | 11 +++++------
> hw/pcie.h | 2 --
> hw/xio3130_downstream.c | 2 +-
> hw/xio3130_upstream.c | 3 ---
> 6 files changed, 12 insertions(+), 13 deletions(-)
>
> diff --git a/hw/pci.c b/hw/pci.c
> index 0cb4117..eb21848 100644
> --- a/hw/pci.c
> +++ b/hw/pci.c
> @@ -137,7 +137,11 @@ static void pci_update_irq_status(PCIDevice *dev)
> }
> }
>
> -static void pci_device_reset(PCIDevice *dev)
> +/*
> + * This function is called on #RST and FLR.
> + * FLR if PCI_EXP_DEVCTL_BCR_FLR is set
> + */
> +void pci_device_reset(PCIDevice *dev)
> {
> int r;
> /* TODO: call the below unconditionally once all pci devices
> diff --git a/hw/pci.h b/hw/pci.h
> index 17744dc..6e80b08 100644
> --- a/hw/pci.h
> +++ b/hw/pci.h
> @@ -237,6 +237,7 @@ void pci_bus_hotplug(PCIBus *bus, pci_hotplug_fn hotplug,
> DeviceState *dev);
> PCIBus *pci_register_bus(DeviceState *parent, const char *name,
> pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
> void *irq_opaque, int devfn_min, int nirq);
> +void pci_device_reset(PCIDevice *dev);
> void pci_bus_reset(PCIBus *bus);
>
> void pci_bus_set_mem_base(PCIBus *bus, target_phys_addr_t base);
> diff --git a/hw/pcie.c b/hw/pcie.c
> index d1f0086..b93fba4 100644
> --- a/hw/pcie.c
> +++ b/hw/pcie.c
> @@ -380,10 +380,6 @@ void pcie_cap_root_reset(PCIDevice *dev)
> pci_set_word(dev->config + dev->exp.exp_cap + PCI_EXP_RTCTL, 0);
> }
>
> -/*
> - * TODO: implement FLR:
> - * Right now sets the bit which indicates FLR is supported.
> - */
> /* function level reset(FLR) */
> void pcie_cap_flr_init(PCIDevice *dev)
> {
> @@ -403,8 +399,11 @@ void pcie_cap_flr_write_config(PCIDevice *dev,
> uint32_t addr, uint32_t val, int len)
> {
> uint8_t *devctl = dev->config + dev->exp.exp_cap + PCI_EXP_DEVCTL;
> - if (pci_word_test_and_clear_mask(devctl, PCI_EXP_DEVCTL_BCR_FLR)) {
> - /* TODO: implement FLR */
> + if (pci_get_word(devctl) & PCI_EXP_DEVCTL_BCR_FLR) {
> + /* don't clear PCI_EXP_DEVCTL_BCR_FLR to tell reset handler
> + that this reset is FLR */
Rewritten this comment:
> /* Clear PCI_EXP_DEVCTL_BCR_FLR after invoking the reset handler
> so the handler can detect FLR by looking at this bit. */
This was the intent, yes?
> + pci_device_reset(dev);
> + pci_word_test_and_clear_mask(devctl, PCI_EXP_DEVCTL_BCR_FLR);
> }
> }
>
> diff --git a/hw/pcie.h b/hw/pcie.h
> index 7baa813..bc909e2 100644
> --- a/hw/pcie.h
> +++ b/hw/pcie.h
> @@ -63,8 +63,6 @@ struct PCIExpressDevice {
> /* Offset of express capability in config space */
> uint8_t exp_cap;
>
> - /* TODO FLR */
> -
> /* SLOT */
> unsigned int hpev_intx; /* INTx for hot plug event (0-3:INT[A-D]#)
> * default is 0 = INTA#
> diff --git a/hw/xio3130_downstream.c b/hw/xio3130_downstream.c
> index 1a2d258..5aa6a6b 100644
> --- a/hw/xio3130_downstream.c
> +++ b/hw/xio3130_downstream.c
> @@ -89,7 +89,7 @@ static int xio3130_downstream_initfn(PCIDevice *d)
> if (rc < 0) {
> goto err_msi;
> }
> - pcie_cap_flr_init(d); /* TODO: implement FLR */
> + pcie_cap_flr_init(d);
> pcie_cap_deverr_init(d);
> pcie_cap_slot_init(d, s->slot);
> pcie_chassis_create(s->chassis);
> diff --git a/hw/xio3130_upstream.c b/hw/xio3130_upstream.c
> index 387bf6c..a7640f5 100644
> --- a/hw/xio3130_upstream.c
> +++ b/hw/xio3130_upstream.c
> @@ -85,10 +85,7 @@ static int xio3130_upstream_initfn(PCIDevice *d)
> if (rc < 0) {
> goto err_msi;
> }
> -
> - /* TODO: implement FLR */
> pcie_cap_flr_init(d);
> -
> pcie_cap_deverr_init(d);
> rc = pcie_aer_init(d, XIO3130_AER_OFFSET);
> if (rc < 0) {
> --
> 1.7.1.1