diff mbox series

[net-next,v5,2/3] net: ethernet: ti: Add desc_infos member to struct k3_cppi_desc_pool

Message ID 20240223-am65-cpsw-xdp-basic-v5-2-bc1739170bc6@baylibre.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series Add minimal XDP support to TI AM65 CPSW Ethernet driver | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 8 this patch: 8
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 10 of 10 maintainers
netdev/build_clang success Errors and warnings before: 8 this patch: 8
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 8 this patch: 8
netdev/checkpatch warning WARNING: line length of 83 exceeds 80 columns WARNING: line length of 90 exceeds 80 columns WARNING: line length of 94 exceeds 80 columns WARNING: line length of 95 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Julien Panis March 28, 2024, 9:26 a.m. UTC
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@baylibre.com>
---
 drivers/net/ethernet/ti/k3-cppi-desc-pool.c | 25 +++++++++++++++++++++++++
 drivers/net/ethernet/ti/k3-cppi-desc-pool.h |  2 ++
 2 files changed, 27 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/ti/k3-cppi-desc-pool.c b/drivers/net/ethernet/ti/k3-cppi-desc-pool.c
index fe8203c05731..bb42bdf7c13d 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)
@@ -37,6 +38,8 @@  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 */
 }
 EXPORT_SYMBOL_GPL(k3_cppi_desc_pool_destroy);
@@ -72,6 +75,14 @@  k3_cppi_desc_pool_create_name(struct device *dev, size_t size,
 		goto gen_pool_create_fail;
 	}
 
+	pool->desc_infos = kcalloc(pool->num_desc, sizeof(*pool->desc_infos), GFP_KERNEL);
+	if (!pool->desc_infos) {
+		ret = -ENOMEM;
+		dev_err(pool->dev, "pool descriptor infos alloc failed %d\n", ret);
+		kfree_const(pool_name);
+		goto gen_pool_desc_infos_alloc_fail;
+	}
+
 	pool->gen_pool->name = pool_name;
 
 	pool->cpumem = dma_alloc_coherent(pool->dev, pool->mem_size,
@@ -94,6 +105,8 @@  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);
@@ -144,5 +157,17 @@  void *k3_cppi_desc_pool_cpuaddr(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(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 149d5579a5e2..0076596307e7 100644
--- a/drivers/net/ethernet/ti/k3-cppi-desc-pool.h
+++ b/drivers/net/ethernet/ti/k3-cppi-desc-pool.h
@@ -28,5 +28,7 @@  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(struct k3_cppi_desc_pool *pool);
 void *k3_cppi_desc_pool_cpuaddr(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(struct k3_cppi_desc_pool *pool, int desc_idx);
 
 #endif /* K3_CPPI_DESC_POOL_H_ */