| Message ID | 20241113124158.22863-13-pstanner@redhat.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | Remove implicit devres from pci_intx() | expand |
On Wed, Nov 13 2024 at 13:41, Philipp Stanner wrote: > pci_intx() is a hybrid function which can sometimes be managed through > devres. This hybrid nature is undesirable. > > Since all users of pci_intx() have by now been ported either to > always-managed pcim_intx() or never-managed pci_intx_unmanaged(), the > devres functionality can be removed from pci_intx(). > > Consequently, pci_intx_unmanaged() is now redundant, because pci_intx() > itself is now unmanaged. > > Remove the devres functionality from pci_intx(). Have all users of > pci_intx_unmanaged() call pci_intx(). Remove pci_intx_unmanaged(). > > Signed-off-by: Philipp Stanner <pstanner@redhat.com> > --- > drivers/misc/cardreader/rtsx_pcr.c | 2 +- > drivers/misc/tifm_7xx1.c | 6 +-- > .../net/ethernet/broadcom/bnx2x/bnx2x_main.c | 2 +- > drivers/net/ethernet/brocade/bna/bnad.c | 2 +- > drivers/ntb/hw/amd/ntb_hw_amd.c | 4 +- > drivers/ntb/hw/intel/ntb_hw_gen1.c | 2 +- > drivers/pci/devres.c | 4 +- > drivers/pci/msi/api.c | 2 +- > drivers/pci/msi/msi.c | 2 +- > drivers/pci/pci.c | 43 +------------------ > drivers/vfio/pci/vfio_pci_core.c | 2 +- > drivers/vfio/pci/vfio_pci_intrs.c | 10 ++--- > drivers/xen/xen-pciback/conf_space_header.c | 2 +- > include/linux/pci.h | 1 - > 14 files changed, 22 insertions(+), 62 deletions(-) Now I'm utterly confused. This undoes the pci_intx_unmanaged() churn which you carefully split into several patches first. So the net change is that: 1) pci_intx() is now always unmanaged 2) a couple of drivers use pcim_intx() now instead of pci_intx() The obvious ordering is: 1) Convert the drivers which need the managed version to use pcim_intx() 2) Remove the managed warning in pci_intx() and clean up the comment 3) Remove __pcim_intx() and invoke pci_intx() in the devres code. No? Thanks, tglx
On Wed, 2024-11-13 at 17:22 +0100, Thomas Gleixner wrote: > On Wed, Nov 13 2024 at 13:41, Philipp Stanner wrote: > > pci_intx() is a hybrid function which can sometimes be managed > > through > > devres. This hybrid nature is undesirable. > > > > Since all users of pci_intx() have by now been ported either to > > always-managed pcim_intx() or never-managed pci_intx_unmanaged(), > > the > > devres functionality can be removed from pci_intx(). > > > > Consequently, pci_intx_unmanaged() is now redundant, because > > pci_intx() > > itself is now unmanaged. > > > > Remove the devres functionality from pci_intx(). Have all users of > > pci_intx_unmanaged() call pci_intx(). Remove pci_intx_unmanaged(). > > > > Signed-off-by: Philipp Stanner <pstanner@redhat.com> > > --- > > drivers/misc/cardreader/rtsx_pcr.c | 2 +- > > drivers/misc/tifm_7xx1.c | 6 +-- > > .../net/ethernet/broadcom/bnx2x/bnx2x_main.c | 2 +- > > drivers/net/ethernet/brocade/bna/bnad.c | 2 +- > > drivers/ntb/hw/amd/ntb_hw_amd.c | 4 +- > > drivers/ntb/hw/intel/ntb_hw_gen1.c | 2 +- > > drivers/pci/devres.c | 4 +- > > drivers/pci/msi/api.c | 2 +- > > drivers/pci/msi/msi.c | 2 +- > > drivers/pci/pci.c | 43 +-------------- > > ---- > > drivers/vfio/pci/vfio_pci_core.c | 2 +- > > drivers/vfio/pci/vfio_pci_intrs.c | 10 ++--- > > drivers/xen/xen-pciback/conf_space_header.c | 2 +- > > include/linux/pci.h | 1 - > > 14 files changed, 22 insertions(+), 62 deletions(-) > > Now I'm utterly confused. This undoes the pci_intx_unmanaged() churn > which you carefully split into several patches first. Have you read the email I have linked? There is also the cover-letter (does anyone in the community ever read those?) which explicitly states: "Patch "Remove devres from pci_intx()" obviously reverts the previous patches that made drivers use pci_intx_unmanaged(). But this way it's easier to review and approve. It also makes sure that each checked out commit should provide correct behavior, not just the entire series as a whole." P. > > So the net change is that: > > 1) pci_intx() is now always unmanaged > > 2) a couple of drivers use pcim_intx() now instead of pci_intx() > > The obvious ordering is: > > 1) Convert the drivers which need the managed version to use > pcim_intx() > > 2) Remove the managed warning in pci_intx() and clean up the > comment > > 3) Remove __pcim_intx() and invoke pci_intx() in the devres code. > > No? > > Thanks, > > tglx >
diff --git a/drivers/misc/cardreader/rtsx_pcr.c b/drivers/misc/cardreader/rtsx_pcr.c index e25e6d560dd7..be3d4e0e50cc 100644 --- a/drivers/misc/cardreader/rtsx_pcr.c +++ b/drivers/misc/cardreader/rtsx_pcr.c @@ -1057,7 +1057,7 @@ static int rtsx_pci_acquire_irq(struct rtsx_pcr *pcr) } pcr->irq = pcr->pci->irq; - pci_intx_unmanaged(pcr->pci, !pcr->msi_en); + pci_intx(pcr->pci, !pcr->msi_en); return 0; } diff --git a/drivers/misc/tifm_7xx1.c b/drivers/misc/tifm_7xx1.c index 5f9c7ccae8d2..1d54680d6ed2 100644 --- a/drivers/misc/tifm_7xx1.c +++ b/drivers/misc/tifm_7xx1.c @@ -327,7 +327,7 @@ static int tifm_7xx1_probe(struct pci_dev *dev, goto err_out; } - pci_intx_unmanaged(dev, 1); + pci_intx(dev, 1); fm = tifm_alloc_adapter(dev->device == PCI_DEVICE_ID_TI_XX21_XX11_FM ? 4 : 2, &dev->dev); @@ -368,7 +368,7 @@ static int tifm_7xx1_probe(struct pci_dev *dev, err_out_free: tifm_free_adapter(fm); err_out_int: - pci_intx_unmanaged(dev, 0); + pci_intx(dev, 0); pci_release_regions(dev); err_out: if (!pci_dev_busy) @@ -392,7 +392,7 @@ static void tifm_7xx1_remove(struct pci_dev *dev) tifm_7xx1_sock_power_off(tifm_7xx1_sock_addr(fm->addr, cnt)); iounmap(fm->addr); - pci_intx_unmanaged(dev, 0); + pci_intx(dev, 0); pci_release_regions(dev); pci_disable_device(dev); diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c index 2ae63d6e6792..678829646cec 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c @@ -1669,7 +1669,7 @@ static void bnx2x_igu_int_enable(struct bnx2x *bp) REG_WR(bp, IGU_REG_PF_CONFIGURATION, val); if (val & IGU_PF_CONF_INT_LINE_EN) - pci_intx_unmanaged(bp->pdev, true); + pci_intx(bp->pdev, true); barrier(); diff --git a/drivers/net/ethernet/brocade/bna/bnad.c b/drivers/net/ethernet/brocade/bna/bnad.c index 2b37462d406e..ece6f3b48327 100644 --- a/drivers/net/ethernet/brocade/bna/bnad.c +++ b/drivers/net/ethernet/brocade/bna/bnad.c @@ -2669,7 +2669,7 @@ bnad_enable_msix(struct bnad *bnad) } } - pci_intx_unmanaged(bnad->pcidev, 0); + pci_intx(bnad->pcidev, 0); return; diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.c b/drivers/ntb/hw/amd/ntb_hw_amd.c index b146f170e839..d687e8c2cc78 100644 --- a/drivers/ntb/hw/amd/ntb_hw_amd.c +++ b/drivers/ntb/hw/amd/ntb_hw_amd.c @@ -791,7 +791,7 @@ static int ndev_init_isr(struct amd_ntb_dev *ndev, err_msi_enable: /* Try to set up intx irq */ - pci_intx_unmanaged(pdev, 1); + pci_intx(pdev, 1); rc = request_irq(pdev->irq, ndev_irq_isr, IRQF_SHARED, "ndev_irq_isr", ndev); @@ -831,7 +831,7 @@ static void ndev_deinit_isr(struct amd_ntb_dev *ndev) if (pci_dev_msi_enabled(pdev)) pci_disable_msi(pdev); else - pci_intx_unmanaged(pdev, 0); + pci_intx(pdev, 0); } } diff --git a/drivers/ntb/hw/intel/ntb_hw_gen1.c b/drivers/ntb/hw/intel/ntb_hw_gen1.c index 9ad9d7fe227e..079b8cd79785 100644 --- a/drivers/ntb/hw/intel/ntb_hw_gen1.c +++ b/drivers/ntb/hw/intel/ntb_hw_gen1.c @@ -445,7 +445,7 @@ int ndev_init_isr(struct intel_ntb_dev *ndev, /* Try to set up intx irq */ - pci_intx_unmanaged(pdev, 1); + pci_intx(pdev, 1); rc = request_irq(pdev->irq, ndev_irq_isr, IRQF_SHARED, "ndev_irq_isr", ndev); diff --git a/drivers/pci/devres.c b/drivers/pci/devres.c index d32827a1f2f4..6f8f712fe34e 100644 --- a/drivers/pci/devres.c +++ b/drivers/pci/devres.c @@ -416,7 +416,7 @@ static void pcim_intx_restore(struct device *dev, void *data) struct pci_dev *pdev = to_pci_dev(dev); struct pcim_intx_devres *res = data; - pci_intx_unmanaged(pdev, res->orig_intx); + pci_intx(pdev, res->orig_intx); } static struct pcim_intx_devres *get_or_create_intx_devres(struct device *dev) @@ -453,7 +453,7 @@ int pcim_intx(struct pci_dev *pdev, int enable) return -ENOMEM; res->orig_intx = !enable; - pci_intx_unmanaged(pdev, enable); + pci_intx(pdev, enable); return 0; } diff --git a/drivers/pci/msi/api.c b/drivers/pci/msi/api.c index c95e2e7dc9ab..b956ce591f96 100644 --- a/drivers/pci/msi/api.c +++ b/drivers/pci/msi/api.c @@ -289,7 +289,7 @@ int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs, */ if (affd) irq_create_affinity_masks(1, affd); - pci_intx_unmanaged(dev, 1); + pci_intx(dev, 1); return 1; } } diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c index 53f13b09db50..3a45879d85db 100644 --- a/drivers/pci/msi/msi.c +++ b/drivers/pci/msi/msi.c @@ -268,7 +268,7 @@ EXPORT_SYMBOL_GPL(pci_write_msi_msg); static void pci_intx_for_msi(struct pci_dev *dev, int enable) { if (!(dev->dev_flags & PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG)) - pci_intx_unmanaged(dev, enable); + pci_intx(dev, enable); } static void pci_msi_set_enable(struct pci_dev *dev, int enable) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index c945811b207a..df537c6f383d 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -4481,17 +4481,13 @@ void pci_disable_parity(struct pci_dev *dev) } /** - * pci_intx_unmanaged - enables/disables PCI INTx for device dev, - * unmanaged version + * pci_intx - enables/disables PCI INTx for device dev * @pdev: the PCI device to operate on * @enable: boolean: whether to enable or disable PCI INTx * * Enables/disables PCI INTx for device @pdev - * - * This function behavios identically to pci_intx(), but is never managed with - * devres. */ -void pci_intx_unmanaged(struct pci_dev *pdev, int enable) +void pci_intx(struct pci_dev *pdev, int enable) { u16 pci_command, new; @@ -4507,41 +4503,6 @@ void pci_intx_unmanaged(struct pci_dev *pdev, int enable) pci_write_config_word(pdev, PCI_COMMAND, new); } -EXPORT_SYMBOL_GPL(pci_intx_unmanaged); - -/** - * pci_intx - enables/disables PCI INTx for device dev - * @pdev: the PCI device to operate on - * @enable: boolean: whether to enable or disable PCI INTx - * - * Enables/disables PCI INTx for device @pdev - * - * NOTE: - * This is a "hybrid" function: It's normally unmanaged, but becomes managed - * when pcim_enable_device() has been called in advance. This hybrid feature is - * DEPRECATED! If you want managed cleanup, use pcim_intx() instead. - */ -void pci_intx(struct pci_dev *pdev, int enable) -{ - u16 pci_command, new; - - pci_read_config_word(pdev, PCI_COMMAND, &pci_command); - - if (enable) - new = pci_command & ~PCI_COMMAND_INTX_DISABLE; - else - new = pci_command | PCI_COMMAND_INTX_DISABLE; - - if (new != pci_command) { - /* Preserve the "hybrid" behavior for backwards compatibility */ - if (pci_is_managed(pdev)) { - WARN_ON_ONCE(pcim_intx(pdev, enable) != 0); - return; - } - - pci_write_config_word(pdev, PCI_COMMAND, new); - } -} EXPORT_SYMBOL_GPL(pci_intx); /** diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c index 90240c8d51aa..1ab58da9f38a 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -498,7 +498,7 @@ int vfio_pci_core_enable(struct vfio_pci_core_device *vdev) if (vfio_pci_nointx(pdev)) { pci_info(pdev, "Masking broken INTx support\n"); vdev->nointx = true; - pci_intx_unmanaged(pdev, 0); + pci_intx(pdev, 0); } else vdev->pci_2_3 = pci_intx_mask_supported(pdev); } diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c index 40abb0b937a2..8382c5834335 100644 --- a/drivers/vfio/pci/vfio_pci_intrs.c +++ b/drivers/vfio/pci/vfio_pci_intrs.c @@ -118,7 +118,7 @@ static bool __vfio_pci_intx_mask(struct vfio_pci_core_device *vdev) */ if (unlikely(!is_intx(vdev))) { if (vdev->pci_2_3) - pci_intx_unmanaged(pdev, 0); + pci_intx(pdev, 0); goto out_unlock; } @@ -132,7 +132,7 @@ static bool __vfio_pci_intx_mask(struct vfio_pci_core_device *vdev) * mask, not just when something is pending. */ if (vdev->pci_2_3) - pci_intx_unmanaged(pdev, 0); + pci_intx(pdev, 0); else disable_irq_nosync(pdev->irq); @@ -178,7 +178,7 @@ static int vfio_pci_intx_unmask_handler(void *opaque, void *data) */ if (unlikely(!is_intx(vdev))) { if (vdev->pci_2_3) - pci_intx_unmanaged(pdev, 1); + pci_intx(pdev, 1); goto out_unlock; } @@ -296,7 +296,7 @@ static int vfio_intx_enable(struct vfio_pci_core_device *vdev, */ ctx->masked = vdev->virq_disabled; if (vdev->pci_2_3) { - pci_intx_unmanaged(pdev, !ctx->masked); + pci_intx(pdev, !ctx->masked); irqflags = IRQF_SHARED; } else { irqflags = ctx->masked ? IRQF_NO_AUTOEN : 0; @@ -569,7 +569,7 @@ static void vfio_msi_disable(struct vfio_pci_core_device *vdev, bool msix) * via their shutdown paths. Restore for NoINTx devices. */ if (vdev->nointx) - pci_intx_unmanaged(pdev, 0); + pci_intx(pdev, 0); vdev->irq_type = VFIO_PCI_NUM_IRQS; } diff --git a/drivers/xen/xen-pciback/conf_space_header.c b/drivers/xen/xen-pciback/conf_space_header.c index 8d26d64232e8..fc0332645966 100644 --- a/drivers/xen/xen-pciback/conf_space_header.c +++ b/drivers/xen/xen-pciback/conf_space_header.c @@ -106,7 +106,7 @@ static int command_write(struct pci_dev *dev, int offset, u16 value, void *data) if (dev_data && dev_data->allow_interrupt_control && ((cmd->val ^ value) & PCI_COMMAND_INTX_DISABLE)) - pci_intx_unmanaged(dev, !(value & PCI_COMMAND_INTX_DISABLE)); + pci_intx(dev, !(value & PCI_COMMAND_INTX_DISABLE)); cmd->val = value; diff --git a/include/linux/pci.h b/include/linux/pci.h index 6b8cde76d564..1b2a6dd1dfed 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1353,7 +1353,6 @@ int __must_check pcim_set_mwi(struct pci_dev *dev); int pci_try_set_mwi(struct pci_dev *dev); void pci_clear_mwi(struct pci_dev *dev); void pci_disable_parity(struct pci_dev *dev); -void pci_intx_unmanaged(struct pci_dev *pdev, int enable); void pci_intx(struct pci_dev *dev, int enable); bool pci_check_and_mask_intx(struct pci_dev *dev); bool pci_check_and_unmask_intx(struct pci_dev *dev);
pci_intx() is a hybrid function which can sometimes be managed through devres. This hybrid nature is undesirable. Since all users of pci_intx() have by now been ported either to always-managed pcim_intx() or never-managed pci_intx_unmanaged(), the devres functionality can be removed from pci_intx(). Consequently, pci_intx_unmanaged() is now redundant, because pci_intx() itself is now unmanaged. Remove the devres functionality from pci_intx(). Have all users of pci_intx_unmanaged() call pci_intx(). Remove pci_intx_unmanaged(). Signed-off-by: Philipp Stanner <pstanner@redhat.com> --- drivers/misc/cardreader/rtsx_pcr.c | 2 +- drivers/misc/tifm_7xx1.c | 6 +-- .../net/ethernet/broadcom/bnx2x/bnx2x_main.c | 2 +- drivers/net/ethernet/brocade/bna/bnad.c | 2 +- drivers/ntb/hw/amd/ntb_hw_amd.c | 4 +- drivers/ntb/hw/intel/ntb_hw_gen1.c | 2 +- drivers/pci/devres.c | 4 +- drivers/pci/msi/api.c | 2 +- drivers/pci/msi/msi.c | 2 +- drivers/pci/pci.c | 43 +------------------ drivers/vfio/pci/vfio_pci_core.c | 2 +- drivers/vfio/pci/vfio_pci_intrs.c | 10 ++--- drivers/xen/xen-pciback/conf_space_header.c | 2 +- include/linux/pci.h | 1 - 14 files changed, 22 insertions(+), 62 deletions(-)