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drm/xe: Use fixed CCS mode when running in SR-IOV mode

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We don't support changing CCS mode when running in SR-IOV mode yet.
When running as a PF driver just apply default ccs_mode=1 that VF
drivers will assume as already applied and fixed.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240614101415.2208-1-michal.wajdeczko@intel.com
This commit is contained in:
Michal Wajdeczko 2024-06-14 12:14:15 +02:00
parent de8390b101
commit 97fedf015c
1 changed files with 8 additions and 1 deletions
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9
drivers/gpu/drm/xe/xe_gt_ccs_mode.c
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@ -12,6 +12,7 @@
#include "xe_gt_printk.h"
#include "xe_gt_sysfs.h"
#include "xe_mmio.h"
#include "xe_sriov.h"
static void __xe_gt_apply_ccs_mode(struct xe_gt *gt, u32 num_engines)
{
@ -75,7 +76,7 @@ static void __xe_gt_apply_ccs_mode(struct xe_gt *gt, u32 num_engines)
void xe_gt_apply_ccs_mode(struct xe_gt *gt)
{
if (!gt->ccs_mode)
if (!gt->ccs_mode || IS_SRIOV_VF(gt_to_xe(gt)))
return;
__xe_gt_apply_ccs_mode(gt, gt->ccs_mode);
@ -110,6 +111,12 @@ ccs_mode_store(struct device *kdev, struct device_attribute *attr,
u32 num_engines, num_slices;
int ret;
if (IS_SRIOV(xe)) {
xe_gt_dbg(gt, "Can't change compute mode when running as %s\n",
xe_sriov_mode_to_string(xe_device_sriov_mode(xe)));
return -EOPNOTSUPP;
}
ret = kstrtou32(buff, 0, &num_engines);
if (ret)
return ret;