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Message-Id: <20240223-am65-cpsw-xdp-basic-v9-2-2c194217e325@baylibre.com>
Date: Fri, 12 Apr 2024 17:38:33 +0200
From: Julien Panis <jpanis@...libre.com>
To: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, Russell King <linux@...linux.org.uk>,
Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Sumit Semwal <sumit.semwal@...aro.org>,
Christian König <christian.koenig@....com>,
Simon Horman <horms@...nel.org>, Andrew Lunn <andrew@...n.ch>,
Ratheesh Kannoth <rkannoth@...vell.com>,
Naveen Mamindlapalli <naveenm@...vell.com>,
Jacob Keller <jacob.e.keller@...el.com>
Cc: danishanwar@...com, yuehaibing@...wei.com, rogerq@...nel.org,
netdev@...r.kernel.org, linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
linux-media@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linaro-mm-sig@...ts.linaro.org, Julien Panis <jpanis@...libre.com>
Subject: [PATCH net-next v9 2/3] net: ethernet: ti: Add desc_infos member
to struct k3_cppi_desc_pool
This patch introduces a member and the related accessors which can be
used to store descriptor specific additional information. This member
can store, for instance, an ID to differentiate a skb TX buffer type
from a xdpf TX buffer type.
Signed-off-by: Julien Panis <jpanis@...libre.com>
---
drivers/net/ethernet/ti/k3-cppi-desc-pool.c | 34 ++++++++++++++++++++++++-----
drivers/net/ethernet/ti/k3-cppi-desc-pool.h | 4 ++++
2 files changed, 33 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/ti/k3-cppi-desc-pool.c b/drivers/net/ethernet/ti/k3-cppi-desc-pool.c
index 414bcac9dcc6..739bae8e11ee 100644
--- a/drivers/net/ethernet/ti/k3-cppi-desc-pool.c
+++ b/drivers/net/ethernet/ti/k3-cppi-desc-pool.c
@@ -22,6 +22,7 @@ struct k3_cppi_desc_pool {
size_t mem_size;
size_t num_desc;
struct gen_pool *gen_pool;
+ void **desc_infos;
};
void k3_cppi_desc_pool_destroy(struct k3_cppi_desc_pool *pool)
@@ -37,7 +38,11 @@ void k3_cppi_desc_pool_destroy(struct k3_cppi_desc_pool *pool)
dma_free_coherent(pool->dev, pool->mem_size, pool->cpumem,
pool->dma_addr);
+ kfree(pool->desc_infos);
+
gen_pool_destroy(pool->gen_pool); /* frees pool->name */
+
+ kfree(pool);
}
EXPORT_SYMBOL_GPL(k3_cppi_desc_pool_destroy);
@@ -50,7 +55,7 @@ k3_cppi_desc_pool_create_name(struct device *dev, size_t size,
const char *pool_name = NULL;
int ret = -ENOMEM;
- pool = devm_kzalloc(dev, sizeof(*pool), GFP_KERNEL);
+ pool = kzalloc(sizeof(*pool), GFP_KERNEL);
if (!pool)
return ERR_PTR(ret);
@@ -62,18 +67,21 @@ k3_cppi_desc_pool_create_name(struct device *dev, size_t size,
pool_name = kstrdup_const(name ? name : dev_name(pool->dev),
GFP_KERNEL);
if (!pool_name)
- return ERR_PTR(-ENOMEM);
+ goto gen_pool_create_fail;
pool->gen_pool = gen_pool_create(ilog2(pool->desc_size), -1);
if (!pool->gen_pool) {
- ret = -ENOMEM;
- dev_err(pool->dev, "pool create failed %d\n", ret);
kfree_const(pool_name);
goto gen_pool_create_fail;
}
pool->gen_pool->name = pool_name;
+ pool->desc_infos = kcalloc(pool->num_desc,
+ sizeof(*pool->desc_infos), GFP_KERNEL);
+ if (!pool->desc_infos)
+ goto gen_pool_desc_infos_alloc_fail;
+
pool->cpumem = dma_alloc_coherent(pool->dev, pool->mem_size,
&pool->dma_addr, GFP_KERNEL);
@@ -94,9 +102,11 @@ k3_cppi_desc_pool_create_name(struct device *dev, size_t size,
dma_free_coherent(pool->dev, pool->mem_size, pool->cpumem,
pool->dma_addr);
dma_alloc_fail:
+ kfree(pool->desc_infos);
+gen_pool_desc_infos_alloc_fail:
gen_pool_destroy(pool->gen_pool); /* frees pool->name */
gen_pool_create_fail:
- devm_kfree(pool->dev, pool);
+ kfree(pool);
return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(k3_cppi_desc_pool_create_name);
@@ -144,5 +154,19 @@ void *k3_cppi_desc_pool_cpuaddr(const struct k3_cppi_desc_pool *pool)
}
EXPORT_SYMBOL_GPL(k3_cppi_desc_pool_cpuaddr);
+void k3_cppi_desc_pool_desc_info_set(struct k3_cppi_desc_pool *pool,
+ int desc_idx, void *info)
+{
+ pool->desc_infos[desc_idx] = info;
+}
+EXPORT_SYMBOL_GPL(k3_cppi_desc_pool_desc_info_set);
+
+void *k3_cppi_desc_pool_desc_info(const struct k3_cppi_desc_pool *pool,
+ int desc_idx)
+{
+ return pool->desc_infos[desc_idx];
+}
+EXPORT_SYMBOL_GPL(k3_cppi_desc_pool_desc_info);
+
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("TI K3 CPPI5 descriptors pool API");
diff --git a/drivers/net/ethernet/ti/k3-cppi-desc-pool.h b/drivers/net/ethernet/ti/k3-cppi-desc-pool.h
index 3c6aed0bed71..851d352b338b 100644
--- a/drivers/net/ethernet/ti/k3-cppi-desc-pool.h
+++ b/drivers/net/ethernet/ti/k3-cppi-desc-pool.h
@@ -28,5 +28,9 @@ void k3_cppi_desc_pool_free(struct k3_cppi_desc_pool *pool, void *addr);
size_t k3_cppi_desc_pool_avail(struct k3_cppi_desc_pool *pool);
size_t k3_cppi_desc_pool_desc_size(const struct k3_cppi_desc_pool *pool);
void *k3_cppi_desc_pool_cpuaddr(const struct k3_cppi_desc_pool *pool);
+void k3_cppi_desc_pool_desc_info_set(struct k3_cppi_desc_pool *pool,
+ int desc_idx, void *info);
+void *k3_cppi_desc_pool_desc_info(const struct k3_cppi_desc_pool *pool,
+ int desc_idx);
#endif /* K3_CPPI_DESC_POOL_H_ */
--
2.37.3
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