Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/xe/vf: Ignore force-wake requests if VF
The control and ack force-wake registers are not accessible for
the VF drivers. To avoid changing existing code logic that tracks
woken domains, simply ignore all attempts to access control or ack
registers if we are running as a VF driver.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240611163537.1944-6-michal.wajdeczko@intel.com
+7
+7
drivers/gpu/drm/xe/xe_force_wake.c
+7
drivers/gpu/drm/xe/xe_force_wake.c
···
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12
#include "xe_gt.h"
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#include "xe_gt_printk.h"
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#include "xe_mmio.h"
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+
#include "xe_sriov.h"
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#define XE_FORCE_WAKE_ACK_TIMEOUT_MS 50
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···
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static void __domain_ctl(struct xe_gt *gt, struct xe_force_wake_domain *domain, bool wake)
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{
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+
if (IS_SRIOV(gt_to_xe(gt)))
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+
return;
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+
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xe_mmio_write32(gt, domain->reg_ctl, domain->mask | (wake ? domain->val : 0));
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}
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···
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{
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u32 value;
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int ret;
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+
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+
if (IS_SRIOV(gt_to_xe(gt)))
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+
return 0;
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ret = xe_mmio_wait32(gt, domain->reg_ack, domain->val, wake ? domain->val : 0,
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XE_FORCE_WAKE_ACK_TIMEOUT_MS * USEC_PER_MSEC,