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From: Thomas Monjalon <thomas@monjalon.net>
To: David Marchand <david.marchand@redhat.com>
Cc: dev@dpdk.org, andrew.rybchenko@oktetlabs.ru,
	ferruh.yigit@xilinx.com, Xiaoyun Li <xiaoyun.li@intel.com>,
	Aman Singh <aman.deep.singh@intel.com>,
	Yuying Zhang <yuying.zhang@intel.com>,
	Bruce Richardson <bruce.richardson@intel.com>,
	spiked@nvidia.com
Subject: Re: [PATCH 2/6] app/testpmd: register driver specific commands
Date: Tue, 24 May 2022 19:21:27 +0200
Message-ID: <2203012.AOvM4ru3NT@thomas> (raw)
In-Reply-To: <20220523071031.1868862-3-david.marchand@redhat.com>

23/05/2022 09:10, David Marchand:
> Introduce a testpmd API so that drivers can register specific commands.
> 
> A driver can list some files to compile with testpmd, by setting them
> in the testpmd_sources (driver local) meson variable.
> drivers/meson.build then takes care of appending this to a global meson
> variable, and adding the driver to testpmd dependency.
> 
> Note: testpmd.h is fixed to that it is self sufficient when being
> included.
> 
> Signed-off-by: David Marchand <david.marchand@redhat.com>
> ---
[...]
> +	main_ctx = NULL;
> +	for (i = 0; builtin_ctx[i] != NULL; i++) {
> +		ctx = realloc(main_ctx, (count + i + 1) * sizeof(*ctx));
> +		if (ctx == NULL)
> +			goto err;
> +		main_ctx = ctx;
> +		main_ctx[count + i] = builtin_ctx[i];
> +	}
> +	count += i;
> +
> +	TAILQ_FOREACH(c, &commands_head, next) {
> +		for (i = 0; c->commands[i].ctx != NULL; i++) {
> +			ctx = realloc(main_ctx, (count + i + 1) * sizeof(*ctx));
> +			if (ctx == NULL)
> +				goto err;
> +			main_ctx = ctx;
> +			main_ctx[count + i] = c->commands[i].ctx;
> +		}
> +		count += i;
> +	}
> +
> +	/* cmdline expects a NULL terminated array */
> +	ctx = realloc(main_ctx, (count + 1) * sizeof(*ctx));
> +	if (ctx == NULL)
> +		goto err;
> +	main_ctx = ctx;
> +	main_ctx[count] = NULL;
> +	count += 1;

As Ferruh already said, there's a lot of realloc here.

[...]
> +# Driver specific sources include some testpmd headers.

Suggested reword:
	Driver-specific commands are located in driver directories.

> +includes = include_directories('.')
> +sources += testpmd_drivers_sources
> +deps += testpmd_drivers_deps

[...]
> --- a/app/test-pmd/testpmd.h
> +++ b/app/test-pmd/testpmd.h
> +/* For registering testpmd commands. */
> +struct testpmd_commands {
> +	TAILQ_ENTRY(testpmd_commands) next;
> +	struct {
> +		cmdline_parse_inst_t *ctx;
> +		const char *help;
> +	} commands[];
> +};
> +
> +extern void testpmd_add_commands(struct testpmd_commands *c);

Why extern?

> +#define TESTPMD_ADD_DRIVER_COMMANDS(c) \

Why not TESTPMD_ADD_COMMANDS?

> +RTE_INIT(__##c) \
> +{ \
> +	testpmd_add_commands(&c); \
> +}
[...]
> --- a/drivers/meson.build
> +++ b/drivers/meson.build
> +        if testpmd_sources.length() != 0
> +            testpmd_drivers_sources += testpmd_sources
> +            testpmd_drivers_deps += dependency_name
> +        endif

Are you sure the check is required?
What happens if adding an empty string?

[...]
> --- a/meson.build
> +++ b/meson.build
> @@ -42,6 +42,8 @@ dpdk_drivers = []
>  dpdk_extra_ldflags = []
>  dpdk_libs_disabled = []
>  dpdk_drvs_disabled = []
> +testpmd_drivers_sources = []
> +testpmd_drivers_deps = []

It's polluting a bit the global meson namespace for testpmd
but I think it's worth, I like the idea.

I hope we can merge the infrastucture patches soon.
We can postpone a bit the move of existing drivers
because some are not so obvious.
At least we should make it mandatory now for all new driver-specific commands.

Thanks



  parent reply	other threads:[~2022-05-24 17:21 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-13  7:57 [RFC PATCH 0/4] Split driver specific commands out of testpmd David Marchand
2022-05-13  7:57 ` [RFC PATCH 1/4] app/testpmd: register driver specific commands David Marchand
2022-05-13 10:30   ` David Marchand
2022-05-13  7:57 ` [RFC PATCH 2/4] net/bonding: move testpmd commands David Marchand
2022-05-13 10:09   ` Min Hu (Connor)
2022-05-18 17:24     ` David Marchand
2022-05-18 23:25       ` Konstantin Ananyev
2022-05-19  7:40         ` David Marchand
2022-05-19 11:26           ` Thomas Monjalon
2022-05-20  6:59             ` Andrew Rybchenko
2022-05-24  9:40               ` Konstantin Ananyev
2022-05-24 10:15                 ` Thomas Monjalon
2022-05-24 22:41                   ` Konstantin Ananyev
2022-05-13  7:57 ` [RFC PATCH 3/4] net/i40e: " David Marchand
2022-05-13  7:57 ` [RFC PATCH 4/4] net/ixgbe: " David Marchand
2022-05-18 19:46 ` [RFC PATCH v2 0/5] Split driver specific commands out of testpmd David Marchand
2022-05-18 19:46   ` [RFC PATCH v2 1/5] app/testpmd: mark cmdline symbols as static David Marchand
2022-05-20  6:28     ` Andrew Rybchenko
2022-05-18 19:46   ` [RFC PATCH v2 2/5] app/testpmd: register driver specific commands David Marchand
2022-05-20  6:55     ` Andrew Rybchenko
2022-05-18 19:46   ` [RFC PATCH v2 3/5] net/bonding: move testpmd commands David Marchand
2022-05-20  6:55     ` Andrew Rybchenko
2022-05-18 19:46   ` [RFC PATCH v2 4/5] net/i40e: " David Marchand
2022-05-18 19:46   ` [RFC PATCH v2 5/5] net/ixgbe: " David Marchand
2022-05-20  7:04   ` [RFC PATCH v2 0/5] Split driver specific commands out of testpmd Andrew Rybchenko
2022-05-23  7:10 ` [PATCH 0/6] " David Marchand
2022-05-23  7:10   ` [PATCH 1/6] app/testpmd: mark most cmdline symbols as static David Marchand
2022-05-23 10:19     ` Dumitrescu, Cristian
2022-05-23 18:09       ` Ferruh Yigit
2022-05-23  7:10   ` [PATCH 2/6] app/testpmd: register driver specific commands David Marchand
2022-05-23 18:10     ` Ferruh Yigit
2022-05-24 10:53       ` David Marchand
2022-05-24 11:43         ` Ferruh Yigit
2022-05-24 17:21     ` Thomas Monjalon [this message]
2022-05-24 17:44       ` David Marchand
2022-05-24 17:51         ` Thomas Monjalon
2022-05-23  7:10   ` [PATCH 3/6] net/bonding: move testpmd commands David Marchand
2022-05-23 18:10     ` Ferruh Yigit
2022-06-17  5:06     ` [PATCH v2] " David Marchand
2022-06-20 17:53       ` Ferruh Yigit
2022-05-23  7:10   ` [PATCH 4/6] net/i40e: " David Marchand
2022-06-17  5:07     ` [PATCH v2] " David Marchand
2022-06-20 17:53       ` Ferruh Yigit
2022-05-23  7:10   ` [PATCH 5/6] app/testpmd: drop ixgbe bypass commands David Marchand
2022-05-23 18:10     ` Ferruh Yigit
2022-06-17  5:07     ` [PATCH v2 1/3] app/testpmd: restore " David Marchand
2022-06-17  5:07       ` [PATCH v2 2/3] net/ixgbe: move testpmd commands David Marchand
2022-06-17  5:07       ` [PATCH v2 3/3] net/ixgbe: move bypass init in a testpmd command David Marchand
2022-06-20 19:04         ` Ferruh Yigit
2022-06-23 12:35           ` Zhang, Qi Z
2022-07-21  8:05     ` [PATCH v3 1/3] app/testpmd: restore ixgbe bypass commands David Marchand
2022-07-21  8:05       ` [PATCH v3 2/3] net/ixgbe: move testpmd commands David Marchand
2022-07-21  8:05       ` [PATCH v3 3/3] net/ixgbe: move bypass init in a testpmd command David Marchand
2022-05-23  7:10   ` [PATCH 6/6] net/ixgbe: move testpmd commands David Marchand
2022-05-23 18:09   ` [PATCH 0/6] Split driver specific commands out of testpmd Ferruh Yigit
2022-05-24 20:06 ` [PATCH v2 0/2] " David Marchand
2022-05-24 20:06   ` [PATCH v2 1/2] app/testpmd: mark most cmdline symbols as static David Marchand
2022-05-31 15:15     ` Andrew Rybchenko
2022-05-24 20:06   ` [PATCH v2 2/2] app/testpmd: register driver specific commands David Marchand
2022-05-24 20:28     ` Thomas Monjalon
2022-05-31 15:14       ` Andrew Rybchenko
2022-05-31 15:18         ` David Marchand
2022-05-31 15:18   ` [PATCH v2 0/2] Split driver specific commands out of testpmd Andrew Rybchenko

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