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raw/ioat: configure idxd devices

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Add configure function for idxd devices, taking the same parameters as the
existing configure function for ioat. The ring_size parameter is used to
compute the maximum number of bursts to be supported by the driver, given
that the hardware works on individual bursts of descriptors at a time.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Reviewed-by: Kevin Laatz <kevin.laatz@intel.com>
Acked-by: Radu Nicolau <radu.nicolau@intel.com>
This commit is contained in:
Bruce Richardson 2020-10-08 10:51:25 +01:00 committed by Thomas Monjalon
parent 389d519785
commit 69c4162643
5 changed files with 70 additions and 0 deletions
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1
drivers/raw/ioat/idxd_pci.c
View File

@ -55,6 +55,7 @@ static const struct rte_rawdev_ops idxd_pci_ops = {
.dev_close = idxd_rawdev_close,
.dev_selftest = idxd_rawdev_test,
.dump = idxd_dev_dump,
.dev_configure = idxd_dev_configure,
};
/* each portal uses 4 x 4k pages */

1
drivers/raw/ioat/idxd_vdev.c
View File

@ -34,6 +34,7 @@ static const struct rte_rawdev_ops idxd_vdev_ops = {
.dev_close = idxd_rawdev_close,
.dev_selftest = idxd_rawdev_test,
.dump = idxd_dev_dump,
.dev_configure = idxd_dev_configure,
};
static void *

64
drivers/raw/ioat/ioat_common.c
View File

@ -44,6 +44,70 @@ idxd_dev_dump(struct rte_rawdev *dev, FILE *f)
return 0;
}
int
idxd_dev_configure(const struct rte_rawdev *dev,
rte_rawdev_obj_t config, size_t config_size)
{
struct idxd_rawdev *idxd = dev->dev_private;
struct rte_idxd_rawdev *rte_idxd = &idxd->public;
struct rte_ioat_rawdev_config *cfg = config;
uint16_t max_desc = cfg->ring_size;
uint16_t max_batches = max_desc / BATCH_SIZE;
uint16_t i;
if (config_size != sizeof(*cfg))
return -EINVAL;
if (dev->started) {
IOAT_PMD_ERR("%s: Error, device is started.", __func__);
return -EAGAIN;
}
rte_idxd->hdls_disable = cfg->hdls_disable;
/* limit the batches to what can be stored in hardware */
if (max_batches > idxd->max_batches) {
IOAT_PMD_DEBUG("Ring size of %u is too large for this device, need to limit to %u batches of %u",
max_desc, idxd->max_batches, BATCH_SIZE);
max_batches = idxd->max_batches;
max_desc = max_batches * BATCH_SIZE;
}
if (!rte_is_power_of_2(max_desc))
max_desc = rte_align32pow2(max_desc);
IOAT_PMD_DEBUG("Rawdev %u using %u descriptors in %u batches",
dev->dev_id, max_desc, max_batches);
/* in case we are reconfiguring a device, free any existing memory */
rte_free(rte_idxd->batch_ring);
rte_free(rte_idxd->hdl_ring);
rte_idxd->batch_ring = rte_zmalloc(NULL,
sizeof(*rte_idxd->batch_ring) * max_batches, 0);
if (rte_idxd->batch_ring == NULL)
return -ENOMEM;
rte_idxd->hdl_ring = rte_zmalloc(NULL,
sizeof(*rte_idxd->hdl_ring) * max_desc, 0);
if (rte_idxd->hdl_ring == NULL) {
rte_free(rte_idxd->batch_ring);
rte_idxd->batch_ring = NULL;
return -ENOMEM;
}
rte_idxd->batch_ring_sz = max_batches;
rte_idxd->hdl_ring_sz = max_desc;
for (i = 0; i < rte_idxd->batch_ring_sz; i++) {
struct rte_idxd_desc_batch *b = &rte_idxd->batch_ring[i];
b->batch_desc.completion = rte_mem_virt2iova(&b->comp);
b->batch_desc.desc_addr = rte_mem_virt2iova(&b->null_desc);
b->batch_desc.op_flags = (idxd_op_batch << IDXD_CMD_OP_SHIFT) |
IDXD_FLAG_COMPLETION_ADDR_VALID |
IDXD_FLAG_REQUEST_COMPLETION;
}
return 0;
}
int
idxd_rawdev_create(const char *name, struct rte_device *dev,
const struct idxd_rawdev *base_idxd,

3
drivers/raw/ioat/ioat_private.h
View File

@ -59,6 +59,9 @@ extern int idxd_rawdev_create(const char *name, struct rte_device *dev,
extern int idxd_rawdev_close(struct rte_rawdev *dev);
extern int idxd_dev_configure(const struct rte_rawdev *dev,
rte_rawdev_obj_t config, size_t config_size);
extern int idxd_rawdev_test(uint16_t dev_id);
extern int idxd_dev_dump(struct rte_rawdev *dev, FILE *f);

1
drivers/raw/ioat/rte_ioat_rawdev_fns.h
View File

@ -187,6 +187,7 @@ struct rte_idxd_rawdev {
uint16_t next_ret_hdl; /* the next user hdl to return */
uint16_t last_completed_hdl; /* the last user hdl that has completed */
uint16_t next_free_hdl; /* where the handle for next op will go */
uint16_t hdls_disable; /* disable tracking completion handles */
struct rte_idxd_user_hdl *hdl_ring;
struct rte_idxd_desc_batch *batch_ring;