diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2021-04-12 09:23:27 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-04-12 22:08:38 +0530 |
| commit | 6df0e6c57dfc064af330071f372f11aa8c584997 (patch) | |
| tree | 59331fb108b9e335d47fd9f42e152d7d2109cf81 /drivers/dma/idxd/device.c | |
| parent | 07503e6aefe4a6efd777062191944a14f03b3a18 (diff) | |
dmaengine: idxd: clear MSIX permission entry on shutdown
Add disabling/clearing of MSIX permission entries on device shutdown to
mirror the enabling of the MSIX entries on probe. Current code left the
MSIX enabled and the pasid entries still programmed at device shutdown.
Fixes: 8e50d392652f ("dmaengine: idxd: Add shared workqueue support")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161824457969.882533.6020239898682672311.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/idxd/device.c')
| -rw-r--r-- | drivers/dma/idxd/device.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c index 84a6ea60ecf0..c09687013d29 100644 --- a/drivers/dma/idxd/device.c +++ b/drivers/dma/idxd/device.c @@ -574,6 +574,36 @@ void idxd_device_drain_pasid(struct idxd_device *idxd, int pasid) } /* Device configuration bits */ +void idxd_msix_perm_setup(struct idxd_device *idxd) +{ + union msix_perm mperm; + int i, msixcnt; + + msixcnt = pci_msix_vec_count(idxd->pdev); + if (msixcnt < 0) + return; + + mperm.bits = 0; + mperm.pasid = idxd->pasid; + mperm.pasid_en = device_pasid_enabled(idxd); + for (i = 1; i < msixcnt; i++) + iowrite32(mperm.bits, idxd->reg_base + idxd->msix_perm_offset + i * 8); +} + +void idxd_msix_perm_clear(struct idxd_device *idxd) +{ + union msix_perm mperm; + int i, msixcnt; + + msixcnt = pci_msix_vec_count(idxd->pdev); + if (msixcnt < 0) + return; + + mperm.bits = 0; + for (i = 1; i < msixcnt; i++) + iowrite32(mperm.bits, idxd->reg_base + idxd->msix_perm_offset + i * 8); +} + static void idxd_group_config_write(struct idxd_group *group) { struct idxd_device *idxd = group->idxd; |