| Message ID | 1402365399-5121-5-git-send-email-weiyang@linux.vnet.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Tue, Jun 10, 2014 at 09:56:26AM +0800, Wei Yang wrote: >VFs are dynamically created/released when driver enable them. On some >platforms, like PowerNV, special resources are necessary to enable VFs. > >This patch adds two hooks for platform initialization before creating the VFs. > >Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> >--- > drivers/pci/iov.c | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > >diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c >index 1d21f43..cc87773 100644 >--- a/drivers/pci/iov.c >+++ b/drivers/pci/iov.c >@@ -250,6 +250,11 @@ static void sriov_disable_migration(struct pci_dev *dev) > iounmap(iov->mstate); > } > >+int __weak pcibios_sriov_enable(struct pci_dev *pdev, u16 vf_num) >+{ >+ return 0; >+} >+ > static int sriov_enable(struct pci_dev *dev, int nr_virtfn) > { > int rc; >@@ -260,6 +265,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) > struct pci_dev *pdev; > struct pci_sriov *iov = dev->sriov; > int bars = 0; >+ int retval; > > if (!nr_virtfn) > return 0; >@@ -334,6 +340,12 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) > if (nr_virtfn < initial) > initial = nr_virtfn; > >+ if ((retval = pcibios_sriov_enable(dev, initial))) { >+ dev_err(&dev->dev, "Failure %d from pcibios_sriov_setup()\n", >+ retval); dev_err(&dev->dev, "Failure %d from pcibios_sriov_enable()\n", retval); >+ return retval; >+ } >+ > for (i = 0; i < initial; i++) { > rc = virtfn_add(dev, i, 0); > if (rc) >@@ -368,6 +380,11 @@ failed: > return rc; > } > >+int __weak pcibios_sriov_disable(struct pci_dev *pdev) >+{ >+ return 0; >+} >+ > static void sriov_disable(struct pci_dev *dev) > { > int i; >@@ -382,6 +399,8 @@ static void sriov_disable(struct pci_dev *dev) > for (i = 0; i < iov->num_VFs; i++) > virtfn_remove(dev, i, 0); > >+ pcibios_sriov_disable(dev); >+ > iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE); > pci_cfg_access_lock(dev); > pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl); Thanks, Gavin -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Mon, Jun 23, 2014 at 03:03:10PM +1000, Gavin Shan wrote: >On Tue, Jun 10, 2014 at 09:56:26AM +0800, Wei Yang wrote: >>VFs are dynamically created/released when driver enable them. On some >>platforms, like PowerNV, special resources are necessary to enable VFs. >> >>This patch adds two hooks for platform initialization before creating the VFs. >> >>Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> >>--- >> drivers/pci/iov.c | 19 +++++++++++++++++++ >> 1 file changed, 19 insertions(+) >> >>diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c >>index 1d21f43..cc87773 100644 >>--- a/drivers/pci/iov.c >>+++ b/drivers/pci/iov.c >>@@ -250,6 +250,11 @@ static void sriov_disable_migration(struct pci_dev *dev) >> iounmap(iov->mstate); >> } >> >>+int __weak pcibios_sriov_enable(struct pci_dev *pdev, u16 vf_num) >>+{ >>+ return 0; >>+} >>+ >> static int sriov_enable(struct pci_dev *dev, int nr_virtfn) >> { >> int rc; >>@@ -260,6 +265,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) >> struct pci_dev *pdev; >> struct pci_sriov *iov = dev->sriov; >> int bars = 0; >>+ int retval; >> >> if (!nr_virtfn) >> return 0; >>@@ -334,6 +340,12 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) >> if (nr_virtfn < initial) >> initial = nr_virtfn; >> >>+ if ((retval = pcibios_sriov_enable(dev, initial))) { >>+ dev_err(&dev->dev, "Failure %d from pcibios_sriov_setup()\n", >>+ retval); > > dev_err(&dev->dev, "Failure %d from pcibios_sriov_enable()\n", > retval); Thanks > >>+ return retval; >>+ } >>+ >> for (i = 0; i < initial; i++) { >> rc = virtfn_add(dev, i, 0); >> if (rc) >>@@ -368,6 +380,11 @@ failed: >> return rc; >> } >> >>+int __weak pcibios_sriov_disable(struct pci_dev *pdev) >>+{ >>+ return 0; >>+} >>+ >> static void sriov_disable(struct pci_dev *dev) >> { >> int i; >>@@ -382,6 +399,8 @@ static void sriov_disable(struct pci_dev *dev) >> for (i = 0; i < iov->num_VFs; i++) >> virtfn_remove(dev, i, 0); >> >>+ pcibios_sriov_disable(dev); >>+ >> iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE); >> pci_cfg_access_lock(dev); >> pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl); > >Thanks, >Gavin
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index 1d21f43..cc87773 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -250,6 +250,11 @@ static void sriov_disable_migration(struct pci_dev *dev) iounmap(iov->mstate); } +int __weak pcibios_sriov_enable(struct pci_dev *pdev, u16 vf_num) +{ + return 0; +} + static int sriov_enable(struct pci_dev *dev, int nr_virtfn) { int rc; @@ -260,6 +265,7 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) struct pci_dev *pdev; struct pci_sriov *iov = dev->sriov; int bars = 0; + int retval; if (!nr_virtfn) return 0; @@ -334,6 +340,12 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) if (nr_virtfn < initial) initial = nr_virtfn; + if ((retval = pcibios_sriov_enable(dev, initial))) { + dev_err(&dev->dev, "Failure %d from pcibios_sriov_setup()\n", + retval); + return retval; + } + for (i = 0; i < initial; i++) { rc = virtfn_add(dev, i, 0); if (rc) @@ -368,6 +380,11 @@ failed: return rc; } +int __weak pcibios_sriov_disable(struct pci_dev *pdev) +{ + return 0; +} + static void sriov_disable(struct pci_dev *dev) { int i; @@ -382,6 +399,8 @@ static void sriov_disable(struct pci_dev *dev) for (i = 0; i < iov->num_VFs; i++) virtfn_remove(dev, i, 0); + pcibios_sriov_disable(dev); + iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE); pci_cfg_access_lock(dev); pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
VFs are dynamically created/released when driver enable them. On some platforms, like PowerNV, special resources are necessary to enable VFs. This patch adds two hooks for platform initialization before creating the VFs. Signed-off-by: Wei Yang <weiyang@linux.vnet.ibm.com> --- drivers/pci/iov.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)