In some cases, like when building a Snap application that uses libdrm, the `amdgpu.ids` file isn't directly available at the compiling place, but inside a mounted folder. This forces each application to link/bind the file from the current place (usually at the $SNAP/gnome-platform/usr/share/libdrm/amdgpu.ids) which is cumbersome.
This patch allows to set an environment variable, called AMDGPU_ASIC_ID_TABLE_PATH, where the file will be also searched if it isn't located in the default, meson-configured, path. This patch is also available in the MESA gitlab: https://gitlab.freedesktop.org/mesa/drm/-/merge_requests/273 --- README.rst | 9 +++++++++ amdgpu/amdgpu_asic_id.c | 14 ++++++++++---- 2 files changed, 19 insertions(+), 4 deletions(-) diff --git a/README.rst b/README.rst index 74608031..6532c12f 100644 --- a/README.rst +++ b/README.rst @@ -49,3 +49,12 @@ Then use ninja to build and install: If you are installing into a system location you will need to run install separately, and as root. + +AMDGPU ASIC table file +---------------------- + +The AMDGPU driver requires the `amdgpu.ids` file. It is usually located at +`$PREFIX/share/libdrm`, but it is possible to specify an alternative path +during runtime by setting the `AMDGPU_ASIC_ID_TABLE_PATH` environment +variable with the full path (including the file name) of the alternative +file. diff --git a/amdgpu/amdgpu_asic_id.c b/amdgpu/amdgpu_asic_id.c index a5007ffc..81a7cf7f 100644 --- a/amdgpu/amdgpu_asic_id.c +++ b/amdgpu/amdgpu_asic_id.c @@ -112,10 +112,16 @@ void amdgpu_parse_asic_ids(struct amdgpu_device *dev) ssize_t n; int line_num = 1; int r = 0; + const char *amdgpu_asic_id_table_path = getenv("AMDGPU_ASIC_ID_TABLE_PATH"); + + if (amdgpu_asic_id_table_path == NULL || amdgpu_asic_id_table_path[0] == '\0') { + amdgpu_asic_id_table_path = AMDGPU_ASIC_ID_TABLE; + } + + fp = fopen(amdgpu_asic_id_table_path, "r"); - fp = fopen(AMDGPU_ASIC_ID_TABLE, "r"); if (!fp) { - fprintf(stderr, "%s: %s\n", AMDGPU_ASIC_ID_TABLE, + fprintf(stderr, "%s: %s\n", amdgpu_asic_id_table_path, strerror(errno)); return; } @@ -132,7 +138,7 @@ void amdgpu_parse_asic_ids(struct amdgpu_device *dev) continue; } - drmMsg("%s version: %s\n", AMDGPU_ASIC_ID_TABLE, line); + drmMsg("%s version: %s\n", amdgpu_asic_id_table_path, line); break; } @@ -150,7 +156,7 @@ void amdgpu_parse_asic_ids(struct amdgpu_device *dev) if (r == -EINVAL) { fprintf(stderr, "Invalid format: %s: line %d: %s\n", - AMDGPU_ASIC_ID_TABLE, line_num, line); + amdgpu_asic_id_table_path, line_num, line); } else if (r && r != -EAGAIN) { fprintf(stderr, "%s: Cannot parse ASIC IDs: %s\n", __func__, strerror(-r)); -- 2.45.2
