dma/idxd: add datapath structures

Add data structures required for the data path for IDXD devices.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
Reviewed-by: Conor Walsh <conor.walsh@intel.com>
Reviewed-by: Chengwen Feng <fengchengwen@huawei.com>

diff --git a/drivers/dma/idxd/idxd_bus.c b/drivers/dma/idxd/idxd_bus.c
index f5bd101..2d5490b 100644 (file)
--- a/drivers/dma/idxd/idxd_bus.c
+++ b/drivers/dma/idxd/idxd_bus.c
@@ -96,6 +96,7 @@ idxd_dev_close(struct rte_dma_dev *dev)
 
 static const struct rte_dma_dev_ops idxd_bus_ops = {
                .dev_close = idxd_dev_close,
+               .dev_dump = idxd_dump,
 };
 
 static void *

diff --git a/drivers/dma/idxd/idxd_common.c b/drivers/dma/idxd/idxd_common.c
index 08ed3e4..46598c3 100644 (file)
--- a/drivers/dma/idxd/idxd_common.c
+++ b/drivers/dma/idxd/idxd_common.c
@@ -10,6 +10,35 @@
 
 #define IDXD_PMD_NAME_STR "dmadev_idxd"
 
+int
+idxd_dump(const struct rte_dma_dev *dev, FILE *f)
+{
+       struct idxd_dmadev *idxd = dev->fp_obj->dev_private;
+       unsigned int i;
+
+       fprintf(f, "== IDXD Private Data ==\n");
+       fprintf(f, "  Portal: %p\n", idxd->portal);
+       fprintf(f, "  Config: { ring_size: %u }\n",
+                       idxd->qcfg.nb_desc);
+       fprintf(f, "  Batch ring (sz = %u, max_batches = %u):\n\t",
+                       idxd->max_batches + 1, idxd->max_batches);
+       for (i = 0; i <= idxd->max_batches; i++) {
+               fprintf(f, " %u ", idxd->batch_idx_ring[i]);
+               if (i == idxd->batch_idx_read && i == idxd->batch_idx_write)
+                       fprintf(f, "[rd ptr, wr ptr] ");
+               else if (i == idxd->batch_idx_read)
+                       fprintf(f, "[rd ptr] ");
+               else if (i == idxd->batch_idx_write)
+                       fprintf(f, "[wr ptr] ");
+               if (i == idxd->max_batches)
+                       fprintf(f, "\n");
+       }
+
+       fprintf(f, "  Curr batch: start = %u, size = %u\n", idxd->batch_start, idxd->batch_size);
+       fprintf(f, "  IDS: avail = %u, returned: %u\n", idxd->ids_avail, idxd->ids_returned);
+       return 0;
+}
+
 int
 idxd_dmadev_create(const char *name, struct rte_device *dev,
                   const struct idxd_dmadev *base_idxd,
@@ -19,6 +48,10 @@ idxd_dmadev_create(const char *name, struct rte_device *dev,
        struct rte_dma_dev *dmadev = NULL;
        int ret = 0;
 
+       RTE_BUILD_BUG_ON(sizeof(struct idxd_hw_desc) != 64);
+       RTE_BUILD_BUG_ON(offsetof(struct idxd_hw_desc, size) != 32);
+       RTE_BUILD_BUG_ON(sizeof(struct idxd_completion) != 32);
+
        if (!name) {
                IDXD_PMD_ERR("Invalid name of the device!");
                ret = -EINVAL;

diff --git a/drivers/dma/idxd/idxd_hw_defs.h b/drivers/dma/idxd/idxd_hw_defs.h
index 86f7f35..55ca9f7 100644 (file)
--- a/drivers/dma/idxd/idxd_hw_defs.h
+++ b/drivers/dma/idxd/idxd_hw_defs.h
@@ -5,6 +5,47 @@
 #ifndef _IDXD_HW_DEFS_H_
 #define _IDXD_HW_DEFS_H_
 
+/*
+ * Defines used in the data path for interacting with IDXD hardware.
+ */
+#define IDXD_CMD_OP_SHIFT 24
+enum rte_idxd_ops {
+       idxd_op_nop = 0,
+       idxd_op_batch,
+       idxd_op_drain,
+       idxd_op_memmove,
+       idxd_op_fill
+};
+
+#define IDXD_FLAG_FENCE                 (1 << 0)
+#define IDXD_FLAG_COMPLETION_ADDR_VALID (1 << 2)
+#define IDXD_FLAG_REQUEST_COMPLETION    (1 << 3)
+#define IDXD_FLAG_CACHE_CONTROL         (1 << 8)
+
+/**
+ * Hardware descriptor used by DSA hardware, for both bursts and
+ * for individual operations.
+ */
+struct idxd_hw_desc {
+       uint32_t pasid;
+       uint32_t op_flags;
+       rte_iova_t completion;
+
+       RTE_STD_C11
+       union {
+               rte_iova_t src;      /* source address for copy ops etc. */
+               rte_iova_t desc_addr; /* descriptor pointer for batch */
+       };
+       rte_iova_t dst;
+
+       uint32_t size;    /* length of data for op, or batch size */
+
+       uint16_t intr_handle; /* completion interrupt handle */
+
+       /* remaining 26 bytes are reserved */
+       uint16_t __reserved[13];
+} __rte_aligned(64);
+
 #define IDXD_COMP_STATUS_INCOMPLETE        0
 #define IDXD_COMP_STATUS_SUCCESS           1
 #define IDXD_COMP_STATUS_INVALID_OPCODE 0x10

diff --git a/drivers/dma/idxd/idxd_internal.h b/drivers/dma/idxd/idxd_internal.h
index 8473bf9..5e253fd 100644 (file)
--- a/drivers/dma/idxd/idxd_internal.h
+++ b/drivers/dma/idxd/idxd_internal.h
@@ -40,6 +40,8 @@ struct idxd_pci_common {
 };
 
 struct idxd_dmadev {
+       struct idxd_hw_desc *desc_ring;
+
        /* counters to track the batches */
        unsigned short max_batches;
        unsigned short batch_idx_read;
@@ -63,6 +65,7 @@ struct idxd_dmadev {
        unsigned short max_batch_size;
 
        struct rte_dma_dev *dmadev;
+       struct rte_dma_vchan_conf qcfg;
        uint8_t sva_support;
        uint8_t qid;
 
@@ -77,5 +80,6 @@ struct idxd_dmadev {
 
 int idxd_dmadev_create(const char *name, struct rte_device *dev,
                const struct idxd_dmadev *base_idxd, const struct rte_dma_dev_ops *ops);
+int idxd_dump(const struct rte_dma_dev *dev, FILE *f);
 
 #endif /* _IDXD_INTERNAL_H_ */

diff --git a/drivers/dma/idxd/idxd_pci.c b/drivers/dma/idxd/idxd_pci.c
index 6d26574..0b3a6ee 100644 (file)
--- a/drivers/dma/idxd/idxd_pci.c
+++ b/drivers/dma/idxd/idxd_pci.c
@@ -77,12 +77,14 @@ idxd_pci_dev_close(struct rte_dma_dev *dev)
        /* free device memory */
        IDXD_PMD_DEBUG("Freeing device driver memory");
        rte_free(idxd->batch_idx_ring);
+       rte_free(idxd->desc_ring);
 
        return 0;
 }
 
 static const struct rte_dma_dev_ops idxd_pci_ops = {
        .dev_close = idxd_pci_dev_close,
+       .dev_dump = idxd_dump,
 };
 
 /* each portal uses 4 x 4k pages */