diff options
| author | Ofir Bitton <obitton@habana.ai> | 2022-08-22 10:59:34 +0300 |
|---|---|---|
| committer | Oded Gabbay <ogabbay@kernel.org> | 2022-09-18 13:29:53 +0300 |
| commit | c38f72370b615d48c7eb44389b229105f07a70e2 (patch) | |
| tree | 62073f917d74cfec3695aa90a1fee06e07b6585e /drivers/misc | |
| parent | 262042af1397099f88386830152770bcfd0de122 (diff) | |
| download | linux-rpi-c38f72370b615d48c7eb44389b229105f07a70e2.tar.gz linux-rpi-c38f72370b615d48c7eb44389b229105f07a70e2.tar.bz2 linux-rpi-c38f72370b615d48c7eb44389b229105f07a70e2.zip | |
habanalabs: perform context switch flow only if needed
Except Goya, none of our ASICs require context switch flow, hence we
enable this flow only where it is needed.
Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/habanalabs/common/command_submission.c | 10 | ||||
| -rw-r--r-- | drivers/misc/habanalabs/common/habanalabs.h | 2 | ||||
| -rw-r--r-- | drivers/misc/habanalabs/goya/goya.c | 1 |
3 files changed, 9 insertions, 4 deletions
diff --git a/drivers/misc/habanalabs/common/command_submission.c b/drivers/misc/habanalabs/common/command_submission.c index cf4118515678..746b688d34cf 100644 --- a/drivers/misc/habanalabs/common/command_submission.c +++ b/drivers/misc/habanalabs/common/command_submission.c @@ -1590,13 +1590,14 @@ static int hl_cs_ctx_switch(struct hl_fpriv *hpriv, union hl_cs_args *args, struct hl_device *hdev = hpriv->hdev; struct hl_ctx *ctx = hpriv->ctx; bool need_soft_reset = false; - int rc = 0, do_ctx_switch; + int rc = 0, do_ctx_switch = 0; void __user *chunks; u32 num_chunks, tmp; u16 sob_count; int ret; - do_ctx_switch = atomic_cmpxchg(&ctx->thread_ctx_switch_token, 1, 0); + if (hdev->supports_ctx_switch) + do_ctx_switch = atomic_cmpxchg(&ctx->thread_ctx_switch_token, 1, 0); if (do_ctx_switch || (args->in.cs_flags & HL_CS_FLAGS_FORCE_RESTORE)) { mutex_lock(&hpriv->restore_phase_mutex); @@ -1667,9 +1668,10 @@ wait_again: } } - ctx->thread_ctx_switch_wait_token = 1; + if (hdev->supports_ctx_switch) + ctx->thread_ctx_switch_wait_token = 1; - } else if (!ctx->thread_ctx_switch_wait_token) { + } else if (hdev->supports_ctx_switch && !ctx->thread_ctx_switch_wait_token) { rc = hl_poll_timeout_memory(hdev, &ctx->thread_ctx_switch_wait_token, tmp, (tmp == 1), 100, jiffies_to_usecs(hdev->timeout_jiffies), false); diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h index d7fd4f57abf3..33c6476b60a9 100644 --- a/drivers/misc/habanalabs/common/habanalabs.h +++ b/drivers/misc/habanalabs/common/habanalabs.h @@ -3199,6 +3199,7 @@ struct hl_reset_info { * Used only for testing. * @heartbeat: Controls if we want to enable the heartbeat mechanism vs. the f/w, which verifies * that the f/w is always alive. Used only for testing. + * @supports_ctx_switch: true if a ctx switch is required upon first submission. */ struct hl_device { struct pci_dev *pdev; @@ -3335,6 +3336,7 @@ struct hl_device { u8 compute_ctx_in_release; u8 supports_mmu_prefetch; u8 reset_upon_device_release; + u8 supports_ctx_switch; /* Parameters for bring-up */ u64 nic_ports_mask; diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c index 87465a28af0d..d8fb91d257b9 100644 --- a/drivers/misc/habanalabs/goya/goya.c +++ b/drivers/misc/habanalabs/goya/goya.c @@ -1025,6 +1025,7 @@ static int goya_sw_init(struct hl_device *hdev) hdev->asic_prop.supports_compute_reset = true; hdev->asic_prop.allow_inference_soft_reset = true; hdev->supports_wait_for_multi_cs = false; + hdev->supports_ctx_switch = true; hdev->asic_funcs->set_pci_memory_regions(hdev); |