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>

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 *

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;

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

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_ */

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 */