[PATCH i-g-t v3 6/8] lib/intel_multigpu: Add xe_multi_fork_foreach_gpu
Piatkowski, Dominik Karol
dominik.karol.piatkowski at intel.com
Fri Jan 26 08:02:02 UTC 2024
Hi Kamil,
> -----Original Message-----
> From: igt-dev <igt-dev-bounces at lists.freedesktop.org> On Behalf Of Kamil
> Konieczny
> Sent: Thursday, January 25, 2024 7:36 PM
> To: igt-dev at lists.freedesktop.org
> Subject: [PATCH i-g-t v3 6/8] lib/intel_multigpu: Add
> xe_multi_fork_foreach_gpu
>
> Create macro for testing Xe driver in multigpu scenarios with the help of few
> new multigpu functions. Also while at this, add documentation for public
> functions and use new helper in existing multi-gpu macro.
>
> v2: corrected description (Kamil), rebased on corrected patches
> after Dominik review
> v3: corrected descritions, renamed function to print_gpus
Nitpick: typo in "descriptions"
> and did small refactoring (Kamil)
> fixed typo in function name (Dominik)
>
> Signed-off-by: Kamil Konieczny <kamil.konieczny at linux.intel.com>
> ---
> lib/intel_multigpu.c | 106
> +++++++++++++++++++++++++++++++++++++++++--
> lib/intel_multigpu.h | 12 ++++-
> 2 files changed, 112 insertions(+), 6 deletions(-)
>
> diff --git a/lib/intel_multigpu.c b/lib/intel_multigpu.c index
> 0e76d8aa3..689c4f10c 100644
> --- a/lib/intel_multigpu.c
> +++ b/lib/intel_multigpu.c
> @@ -4,10 +4,19 @@
> */
>
> #include "drmtest.h"
> +#include "i915/gem.h"
> #include "igt_core.h"
> #include "igt_device_scan.h"
> #include "intel_multigpu.h"
>
> +/**
> + * gem_multigpu_count_class:
> + * @class: chipset, e.g. DRIVER_XE or DRIVER_INTEL
> + *
> + * Function counts number of GPU cards with the help of opening all of them.
> + *
> + * Returns: number of GPUs cards found
> + */
> int gem_multigpu_count_class(int class) {
> int count = 0;
> @@ -18,7 +27,7 @@ int gem_multigpu_count_class(int class)
> return count;
> }
>
> -void gem_require_multigpu(int count)
> +static void print_gpus(int count, int gpu_num)
> {
> struct igt_devices_print_format fmt = {
> .type = IGT_PRINT_SIMPLE,
> @@ -26,14 +35,101 @@ void gem_require_multigpu(int count)
> };
> int devices;
>
> - if (igt_device_filter_count() >= count)
> - return;
> -
> igt_info("PCI devices available in the system:\n");
>
> igt_devices_scan(true);
> devices = igt_device_filter_pci();
> igt_devices_print(&fmt);
>
> - igt_skip("Test requires at least %d GPUs, %d available.\n", count,
> devices);
> + igt_info("Test requires at least %d GPUs, got %d, available %d\n",
> +count, gpu_num, devices); }
> +
> +/**
> + * gem_require_multigpu:
> + * @count: minimum number of GPUs required
> + *
> + * Function checks number of filtered GPU cards.
> + * On error skips and prints available GPUs found on PCI bus.
> + */
> +void gem_require_multigpu(int count)
> +{
> + int gpu_count = igt_device_filter_count();
> +
> + if (gpu_count >= count)
> + return;
> +
> + print_gpus(count, gpu_count);
> + igt_skip_on(gpu_count < count);
> +}
> +
> +/**
> + * multigpu_acquire_view:
> + * @gpus_wanted: minimum number of GPUs required
> + * @chipset: chipset, e.g. DRIVER_XE or DRIVER_INTEL
> + *
> + * Function prepares filtered view for GPU cards with given chipset.
> + * On error skips and prints available GPUs found on PCI bus.
> + * Returns: number of GPUs found
> + */
> +int multigpu_acquire_view(int gpus_wanted, unsigned int chipset) {
> + int gpu_count = drm_prepare_filtered_multigpu(chipset);
> +
> + igt_assert(gpus_wanted > 1);
> + if (gpu_count >= gpus_wanted)
> + return gpu_count;
> +
> + print_gpus(gpus_wanted, gpu_count);
> + igt_skip_on(gpu_count < gpus_wanted);
> +
> + return gpu_count; /* non-reachable */
> +}
> +
> +/**
> + * multigpu_open_another:
> + * @idx: index of GPU card, starting from 0
> + * @chipset: chipset, e.g. DRIVER_XE or DRIVER_INTEL
> + *
> + * Function opens GPU card with drm_open_driver_another(). For i915 it
> +checks
> + * if opened card is functional. Skips on errors.
> + *
> + * Returns: opened fd for @idx card
> + */
> +int multigpu_open_another(int idx, unsigned int chipset) {
> + int fd;
> +
> + igt_assert(idx >= 0);
> + fd = drm_open_driver_another(idx, chipset);
> +
> + if (chipset == DRIVER_INTEL)
> + igt_require_gem(fd);
> +
> + return fd;
> +}
> +
> +/**
> + * multigpu_open_filtered_card:
> + * @idx: index of GPU card, starting from 0
> + * @chipset: chipset, e.g. DRIVER_XE or DRIVER_INTEL
> + *
> + * Function opens GPU card prepared with filtered view. It also checks
> +if
> + * opened card agrees with desired chipset or checks if opened card is
> + * functional. Skips on errors.
> + *
> + * Returns: opened fd for @idx card
> + */
> +int multigpu_open_filtered_card(int idx, unsigned int chipset) {
> + int fd;
> +
> + igt_assert(idx >= 0);
> + fd = drm_open_filtered_card(idx);
> + igt_require(fd != -1);
> + if (chipset == DRIVER_XE)
> + igt_require_xe(fd);
> + else if (chipset == DRIVER_INTEL)
> + igt_require_gem(fd);
> +
> + return fd;
> }
> diff --git a/lib/intel_multigpu.h b/lib/intel_multigpu.h index
> 0ebc73e4a..97c9b1dd8 100644
> --- a/lib/intel_multigpu.h
> +++ b/lib/intel_multigpu.h
> @@ -12,6 +12,10 @@
> void gem_require_multigpu(int count);
> int gem_multigpu_count_class(int class);
>
> +int multigpu_acquire_view(int min_gpus_wanted, unsigned int chipset);
> +int multigpu_open_another(int idx, unsigned int chipset); int
> +multigpu_open_filtered_card(int idx, unsigned int chipset);
> +
> #define igt_foreach_gpu(fd__, id__) \
> for (int igt_unique(i) = 0, fd__; \
> (fd__ = __drm_open_driver_another(igt_unique(i)++, id__)) >=
> 0; \ @@ -19,8 +23,14 @@ int gem_multigpu_count_class(int class);
>
> #define igt_multi_fork_foreach_gpu(__fd, __id) \
> igt_multi_fork(igt_unique(__i), gem_multigpu_count_class(__id)) \
> - for (int __fd = drm_open_driver_another(igt_unique(__i),
> __id); \
> + for (int __fd = multigpu_open_another(igt_unique(__i), __id);
> \
> __fd >= 0; \
> close(__fd), __fd = -1) \
>
> +#define xe_multi_fork_foreach_gpu(__fd, __gpu_index) \
> + igt_multi_fork(__gpu_index, multigpu_aquire_view(2, DRIVER_XE)) \
Missed typo fix. Otherwise, LGTM.
Reviewed-by: Dominik Karol Piątkowski <dominik.karol.piatkowski at intel.com>
> + for (int __fd = multigpu_open_filtered_card(__gpu_index,
> DRIVER_XE); \
> + __fd >= 0; \
> + drm_close_driver(__fd), __fd = -1) \
> +
> #endif /* __INTEL_MULTIGPU_H */
> --
> 2.42.0
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