TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: ipa: support more endpoints

Browse Source 
Increase the number of endpoints supported by the driver to 36,
which IPA v5.0 supports.  This makes it impossible to check at build
time whether the supported number is too big to fit within the
(5-bit) PACKET_INIT destination endpoint field.  Instead, convert
the build time check to compare against what fits in 8 bits.

Add a check in ipa_endpoint_config() to also ensure the hardware
reports an endpoint count that's in the expected range.  Just
open-code 32 as the limit (the PACKET_INIT field mask is not
available where we'd want to use it).

Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Alex Elder
2023-01-30 15:01:51 -06:00
committed by Jakub Kicinski
parent 71af6a2ddf
commit 07abde549b
3 changed files with 21 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/net/ipa/ipa_endpoint.c
+10 -1
View File
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
* Copyright (C) 2019-2022 Linaro Ltd.
* Copyright (C) 2019-2023 Linaro Ltd.
*/
#include <linux/types.h>
@@ -1986,6 +1986,7 @@ int ipa_endpoint_config(struct ipa *ipa)
struct device *dev = &ipa->pdev->dev;
const struct ipa_reg *reg;
u32 endpoint_id;
u32 hw_limit;
u32 tx_count;
u32 rx_count;
u32 rx_base;
@@ -2031,6 +2032,14 @@ int ipa_endpoint_config(struct ipa *ipa)
return -EINVAL;
}
/* Until IPA v5.0, the max endpoint ID was 32 */
hw_limit = ipa->version < IPA_VERSION_5_0 ? 32 : U8_MAX + 1;
if (limit > hw_limit) {
dev_err(dev, "unexpected endpoint count, %u > %u\n",
limit, hw_limit);
return -EINVAL;
}
/* Allocate and initialize the available endpoint bitmap */
ipa->available = bitmap_zalloc(limit, GFP_KERNEL);
if (!ipa->available)