Commit 6a9e923d authored by paul luse's avatar paul luse Committed by Jim Harris
Browse files

lib/ioat: add mew API to get the max # of descriptors supported 



Needed by follow-on patches to aupport accel_fw batching in IOAT
module.

Signed-off-by: default avatarpaul luse <paul.e.luse@intel.com>
Change-Id: Ie39718f42756c10af131ff7893874d19ea390ecc
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/3154


Community-CI: Mellanox Build Bot
Reviewed-by: default avatarBen Walker <benjamin.walker@intel.com>
Reviewed-by: default avatarJim Harris <james.r.harris@intel.com>
Tested-by: default avatarSPDK CI Jenkins <sys_sgci@intel.com>
parent 3759b870

CHANGELOG.md

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@@ -2,6 +2,10 @@ 


## v20.07: (Upcoming Release)



### ioat



A new API `spdk_ioat_get_max_descriptors` was added.



### nvmf



The NVMe-oF target no longer supports connecting scheduling configuration and instead

include/spdk/ioat.h

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@@ -107,6 +107,15 @@ int spdk_ioat_probe(void *cb_ctx, spdk_ioat_probe_cb probe_cb, spdk_ioat_attach_ 
  */

void spdk_ioat_detach(struct spdk_ioat_chan *ioat);



/**

 * Get the maximum number of descriptors supported by the library.

 *

 * \param chan I/OAT channel

 *

 * \return maximum number of descriptors.

 */

uint32_t spdk_ioat_get_max_descriptors(struct spdk_ioat_chan *chan);



/**

 * Build a DMA engine memory copy request.

 *

lib/ioat/Makefile

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@@ -35,7 +35,7 @@ SPDK_ROOT_DIR := $(abspath $(CURDIR)/../..) 
include $(SPDK_ROOT_DIR)/mk/spdk.common.mk



SO_VER := 2

SO_MINOR := 0

SO_MINOR := 1



C_SRCS = ioat.c

LIBNAME = ioat

lib/ioat/ioat.c

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@@ -374,6 +374,12 @@ ioat_channel_destruct(struct spdk_ioat_chan *ioat) 
	}

}



uint32_t

spdk_ioat_get_max_descriptors(struct spdk_ioat_chan *ioat)

{

	return 1 << ioat->ring_size_order;

}



static int

ioat_channel_start(struct spdk_ioat_chan *ioat)

{

lib/ioat/spdk_ioat.map

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@@ -11,6 +11,7 @@ 
	spdk_ioat_flush;

	spdk_ioat_process_events;

	spdk_ioat_get_dma_capabilities;

	spdk_ioat_get_max_descriptors;



	local: *;

};