Re: [PATCH 1/2] memory: tegra: Add SID override programming for MC clients
From: Ashish Mhetre
Date: Tue Nov 07 2023 - 06:40:57 EST
On 11/7/2023 2:46 PM, kernel test robot wrote:
External email: Use caution opening links or attachments
Hi Ashish,
kernel test robot noticed the following build warnings:
[auto build test WARNING on tegra/for-next]
[also build test WARNING on linus/master v6.6 next-20231107]
[cannot apply to tegra-drm/drm/tegra/for-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Ashish-Mhetre/memory-tegra-Skip-SID-programming-if-SID-registers-aren-t-set/20231107-133149
base: https://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux.git for-next
patch link: https://lore.kernel.org/r/20231107052824.29418-1-amhetre%40nvidia.com
patch subject: [PATCH 1/2] memory: tegra: Add SID override programming for MC clients
config: arm64-defconfig (https://download.01.org/0day-ci/archive/20231107/202311071607.IzbwSn2f-lkp@xxxxxxxxx/config)
compiler: aarch64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231107/202311071607.IzbwSn2f-lkp@xxxxxxxxx/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311071607.IzbwSn2f-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
drivers/memory/tegra/tegra186.c: In function 'tegra186_mc_resume':
drivers/memory/tegra/tegra186.c:78:17: error: implicit declaration of function 'tegra186_mc_client_sid_override' [-Werror=implicit-function-declaration]
78 | tegra186_mc_client_sid_override(mc, client, client->sid);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/memory/tegra/tegra186.c: At top level:
drivers/memory/tegra/tegra186.c:85:13: warning: conflicting types for 'tegra186_mc_client_sid_override'; have 'void(struct tegra_mc *, const struct tegra_mc_client *, unsigned int)'
85 | static void tegra186_mc_client_sid_override(struct tegra_mc *mc,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/memory/tegra/tegra186.c:85:13: error: static declaration of 'tegra186_mc_client_sid_override' follows non-static declaration
drivers/memory/tegra/tegra186.c:78:17: note: previous implicit declaration of 'tegra186_mc_client_sid_override' with type 'void(struct tegra_mc *, const struct tegra_mc_client *, unsigned int)'
78 | tegra186_mc_client_sid_override(mc, client, client->sid);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
Fixed all of the warnings and errors in V2 of this series.
V1 wasn't applied properly in our testing because of which these build
errors weren't caught. Sorry for sending V1 with build issues. Please
use V2 of this series for the reviews.
Thanks and Regards,
Ashish Mhetre
vim +85 drivers/memory/tegra/tegra186.c
7355c7b9ae0d45 Thierry Reding 2021-06-02 70
142620fbbbbba0 Ashish Mhetre 2023-11-07 71 static int tegra186_mc_resume(struct tegra_mc *mc)
142620fbbbbba0 Ashish Mhetre 2023-11-07 72 {
142620fbbbbba0 Ashish Mhetre 2023-11-07 73 unsigned int i;
142620fbbbbba0 Ashish Mhetre 2023-11-07 74
142620fbbbbba0 Ashish Mhetre 2023-11-07 75 for (i = 0; i < mc->soc->num_clients; i++) {
142620fbbbbba0 Ashish Mhetre 2023-11-07 76 const struct tegra_mc_client *client = &mc->soc->clients[i];
142620fbbbbba0 Ashish Mhetre 2023-11-07 77
142620fbbbbba0 Ashish Mhetre 2023-11-07 @78 tegra186_mc_client_sid_override(mc, client, client->sid);
142620fbbbbba0 Ashish Mhetre 2023-11-07 79 }
142620fbbbbba0 Ashish Mhetre 2023-11-07 80
142620fbbbbba0 Ashish Mhetre 2023-11-07 81 return 0;
142620fbbbbba0 Ashish Mhetre 2023-11-07 82 }
142620fbbbbba0 Ashish Mhetre 2023-11-07 83
eaf89f1cd38cf7 Arnd Bergmann 2021-07-22 84 #if IS_ENABLED(CONFIG_IOMMU_API)
393d66fd2cacba Thierry Reding 2021-06-03 @85 static void tegra186_mc_client_sid_override(struct tegra_mc *mc,
393d66fd2cacba Thierry Reding 2021-06-03 86 const struct tegra_mc_client *client,
393d66fd2cacba Thierry Reding 2021-06-03 87 unsigned int sid)
393d66fd2cacba Thierry Reding 2021-06-03 88 {
393d66fd2cacba Thierry Reding 2021-06-03 89 u32 value, old;
393d66fd2cacba Thierry Reding 2021-06-03 90
393d66fd2cacba Thierry Reding 2021-06-03 91 value = readl(mc->regs + client->regs.sid.security);
393d66fd2cacba Thierry Reding 2021-06-03 92 if ((value & MC_SID_STREAMID_SECURITY_OVERRIDE) == 0) {
393d66fd2cacba Thierry Reding 2021-06-03 93 /*
393d66fd2cacba Thierry Reding 2021-06-03 94 * If the secure firmware has locked this down the override
393d66fd2cacba Thierry Reding 2021-06-03 95 * for this memory client, there's nothing we can do here.
393d66fd2cacba Thierry Reding 2021-06-03 96 */
393d66fd2cacba Thierry Reding 2021-06-03 97 if (value & MC_SID_STREAMID_SECURITY_WRITE_ACCESS_DISABLED)
393d66fd2cacba Thierry Reding 2021-06-03 98 return;
393d66fd2cacba Thierry Reding 2021-06-03 99
393d66fd2cacba Thierry Reding 2021-06-03 100 /*
393d66fd2cacba Thierry Reding 2021-06-03 101 * Otherwise, try to set the override itself. Typically the
393d66fd2cacba Thierry Reding 2021-06-03 102 * secure firmware will never have set this configuration.
393d66fd2cacba Thierry Reding 2021-06-03 103 * Instead, it will either have disabled write access to
393d66fd2cacba Thierry Reding 2021-06-03 104 * this field, or it will already have set an explicit
393d66fd2cacba Thierry Reding 2021-06-03 105 * override itself.
393d66fd2cacba Thierry Reding 2021-06-03 106 */
393d66fd2cacba Thierry Reding 2021-06-03 107 WARN_ON((value & MC_SID_STREAMID_SECURITY_OVERRIDE) == 0);
393d66fd2cacba Thierry Reding 2021-06-03 108
393d66fd2cacba Thierry Reding 2021-06-03 109 value |= MC_SID_STREAMID_SECURITY_OVERRIDE;
393d66fd2cacba Thierry Reding 2021-06-03 110 writel(value, mc->regs + client->regs.sid.security);
393d66fd2cacba Thierry Reding 2021-06-03 111 }
393d66fd2cacba Thierry Reding 2021-06-03 112
393d66fd2cacba Thierry Reding 2021-06-03 113 value = readl(mc->regs + client->regs.sid.override);
393d66fd2cacba Thierry Reding 2021-06-03 114 old = value & MC_SID_STREAMID_OVERRIDE_MASK;
393d66fd2cacba Thierry Reding 2021-06-03 115
393d66fd2cacba Thierry Reding 2021-06-03 116 if (old != sid) {
393d66fd2cacba Thierry Reding 2021-06-03 117 dev_dbg(mc->dev, "overriding SID %x for %s with %x\n", old,
393d66fd2cacba Thierry Reding 2021-06-03 118 client->name, sid);
393d66fd2cacba Thierry Reding 2021-06-03 119 writel(sid, mc->regs + client->regs.sid.override);
393d66fd2cacba Thierry Reding 2021-06-03 120 }
393d66fd2cacba Thierry Reding 2021-06-03 121 }
eaf89f1cd38cf7 Arnd Bergmann 2021-07-22 122 #endif
393d66fd2cacba Thierry Reding 2021-06-03 123
--
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