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path: root/drivers/misc/habanalabs/common/decoder.c
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Diffstat (limited to 'drivers/misc/habanalabs/common/decoder.c')
-rw-r--r--drivers/misc/habanalabs/common/decoder.c133
1 files changed, 133 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/common/decoder.c b/drivers/misc/habanalabs/common/decoder.c
new file mode 100644
index 000000000..2aab14d74
--- /dev/null
+++ b/drivers/misc/habanalabs/common/decoder.c
@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Copyright 2022 HabanaLabs, Ltd.
+ * All Rights Reserved.
+ */
+
+#include "habanalabs.h"
+
+#define VCMD_CONTROL_OFFSET 0x40 /* SWREG16 */
+#define VCMD_IRQ_STATUS_OFFSET 0x44 /* SWREG17 */
+
+#define VCMD_IRQ_STATUS_ENDCMD_MASK 0x1
+#define VCMD_IRQ_STATUS_BUSERR_MASK 0x2
+#define VCMD_IRQ_STATUS_TIMEOUT_MASK 0x4
+#define VCMD_IRQ_STATUS_CMDERR_MASK 0x8
+#define VCMD_IRQ_STATUS_ABORT_MASK 0x10
+#define VCMD_IRQ_STATUS_RESET_MASK 0x20
+
+static void dec_print_abnrm_intr_source(struct hl_device *hdev, u32 irq_status)
+{
+ const char *format = "abnormal interrupt source:%s%s%s%s%s%s\n";
+ char *intr_source[6] = {"Unknown", "", "", "", "", ""};
+ int i = 0;
+
+ if (!irq_status)
+ return;
+
+ if (irq_status & VCMD_IRQ_STATUS_ENDCMD_MASK)
+ intr_source[i++] = " ENDCMD";
+ if (irq_status & VCMD_IRQ_STATUS_BUSERR_MASK)
+ intr_source[i++] = " BUSERR";
+ if (irq_status & VCMD_IRQ_STATUS_TIMEOUT_MASK)
+ intr_source[i++] = " TIMEOUT";
+ if (irq_status & VCMD_IRQ_STATUS_CMDERR_MASK)
+ intr_source[i++] = " CMDERR";
+ if (irq_status & VCMD_IRQ_STATUS_ABORT_MASK)
+ intr_source[i++] = " ABORT";
+ if (irq_status & VCMD_IRQ_STATUS_RESET_MASK)
+ intr_source[i++] = " RESET";
+
+ dev_err(hdev->dev, format, intr_source[0], intr_source[1],
+ intr_source[2], intr_source[3], intr_source[4], intr_source[5]);
+}
+
+static void dec_error_intr_work(struct hl_device *hdev, u32 base_addr, u32 core_id)
+{
+ bool reset_required = false;
+ u32 irq_status;
+
+ irq_status = RREG32(base_addr + VCMD_IRQ_STATUS_OFFSET);
+
+ dev_err(hdev->dev, "Decoder abnormal interrupt %#x, core %d\n", irq_status, core_id);
+
+ dec_print_abnrm_intr_source(hdev, irq_status);
+
+ if (irq_status & VCMD_IRQ_STATUS_TIMEOUT_MASK)
+ reset_required = true;
+
+ /* Clear the interrupt */
+ WREG32(base_addr + VCMD_IRQ_STATUS_OFFSET, irq_status);
+
+ /* Flush the interrupt clear */
+ RREG32(base_addr + VCMD_IRQ_STATUS_OFFSET);
+
+ if (reset_required)
+ hl_device_reset(hdev, HL_DRV_RESET_HARD);
+}
+
+static void dec_completion_abnrm(struct work_struct *work)
+{
+ struct hl_dec *dec = container_of(work, struct hl_dec, completion_abnrm_work);
+ struct hl_device *hdev = dec->hdev;
+
+ dec_error_intr_work(hdev, dec->base_addr, dec->core_id);
+}
+
+void hl_dec_fini(struct hl_device *hdev)
+{
+ kfree(hdev->dec);
+}
+
+int hl_dec_init(struct hl_device *hdev)
+{
+ struct asic_fixed_properties *prop = &hdev->asic_prop;
+ struct hl_dec *dec;
+ int rc, j;
+
+ /* if max core is 0, nothing to do*/
+ if (!prop->max_dec)
+ return 0;
+
+ hdev->dec = kcalloc(prop->max_dec, sizeof(struct hl_dec), GFP_KERNEL);
+ if (!hdev->dec)
+ return -ENOMEM;
+
+ for (j = 0 ; j < prop->max_dec ; j++) {
+ dec = hdev->dec + j;
+
+ dec->hdev = hdev;
+ INIT_WORK(&dec->completion_abnrm_work, dec_completion_abnrm);
+ dec->core_id = j;
+ dec->base_addr = hdev->asic_funcs->get_dec_base_addr(hdev, j);
+ if (!dec->base_addr) {
+ dev_err(hdev->dev, "Invalid base address of decoder %d\n", j);
+ rc = -EINVAL;
+ goto err_dec_fini;
+ }
+ }
+
+ return 0;
+
+err_dec_fini:
+ hl_dec_fini(hdev);
+
+ return rc;
+}
+
+void hl_dec_ctx_fini(struct hl_ctx *ctx)
+{
+ struct hl_device *hdev = ctx->hdev;
+ struct asic_fixed_properties *prop = &hdev->asic_prop;
+ struct hl_dec *dec;
+ int j;
+
+ for (j = 0 ; j < prop->max_dec ; j++) {
+ if (!!(prop->decoder_enabled_mask & BIT(j))) {
+ dec = hdev->dec + j;
+ /* Stop the decoder */
+ WREG32(dec->base_addr + VCMD_CONTROL_OFFSET, 0);
+ }
+ }
+}