diff options
Diffstat (limited to 'drivers/iommu/riscv/iommu.h')
| -rw-r--r-- | drivers/iommu/riscv/iommu.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/iommu/riscv/iommu.h b/drivers/iommu/riscv/iommu.h index f1696926582c..b1c4664542b4 100644 --- a/drivers/iommu/riscv/iommu.h +++ b/drivers/iommu/riscv/iommu.h @@ -17,6 +17,22 @@ #include "iommu-bits.h" +struct riscv_iommu_device; + +struct riscv_iommu_queue { + atomic_t prod; /* unbounded producer allocation index */ + atomic_t head; /* unbounded shadow ring buffer consumer index */ + atomic_t tail; /* unbounded shadow ring buffer producer index */ + unsigned int mask; /* index mask, queue length - 1 */ + unsigned int irq; /* allocated interrupt number */ + struct riscv_iommu_device *iommu; /* iommu device handling the queue when active */ + void *base; /* ring buffer kernel pointer */ + dma_addr_t phys; /* ring buffer physical address */ + u16 qbr; /* base register offset, head and tail reference */ + u16 qcr; /* control and status register offset */ + u8 qid; /* queue identifier, same as RISCV_IOMMU_INTR_XX */ +}; + struct riscv_iommu_device { /* iommu core interface */ struct iommu_device iommu; @@ -34,6 +50,11 @@ struct riscv_iommu_device { /* available interrupt numbers, MSI or WSI */ unsigned int irqs[RISCV_IOMMU_INTR_COUNT]; unsigned int irqs_count; + unsigned int icvec; + + /* hardware queues */ + struct riscv_iommu_queue cmdq; + struct riscv_iommu_queue fltq; /* device directory */ unsigned int ddt_mode; |