From: Oded Gabbay <ogabbay@kernel.org>
To: linux-kernel@vger.kernel.org
Subject: [PATCH 3/3] habanalabs: ignore f/w status error
Date: Sat, 17 Apr 2021 12:20:52 +0300 [thread overview]
Message-ID: <20210417092052.22842-3-ogabbay@kernel.org> (raw)
In-Reply-To: <20210417092052.22842-1-ogabbay@kernel.org>
In case firmware has a bug and erroneously reports a status error
(e.g. device unusable) during boot, allow the user to tell the driver
to continue the boot regardless of the error status.
This will be done via kernel parameter which exposes a mask. The
user that loads the driver can decide exactly which status error to
ignore and which to take into account. The bitmask is according to
defines in hl_boot_if.h
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
---
drivers/misc/habanalabs/common/firmware_if.c | 3 ++-
drivers/misc/habanalabs/common/habanalabs.h | 7 +++++++
drivers/misc/habanalabs/common/habanalabs_drv.c | 7 +++++++
3 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/misc/habanalabs/common/firmware_if.c b/drivers/misc/habanalabs/common/firmware_if.c
index 377a7ca886fe..0713b2c12d54 100644
--- a/drivers/misc/habanalabs/common/firmware_if.c
+++ b/drivers/misc/habanalabs/common/firmware_if.c
@@ -400,7 +400,8 @@ static int fw_read_errors(struct hl_device *hdev, u32 boot_err0_reg,
err_exists = true;
}
- if (err_exists)
+ if (err_exists && ((err_val & ~CPU_BOOT_ERR0_ENABLED) &
+ lower_32_bits(hdev->boot_error_status_mask)))
return -EIO;
return 0;
diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index 91291a8e201e..6579f8767abd 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -1962,6 +1962,12 @@ struct hl_mmu_funcs {
* @clock_gating_mask: is clock gating enabled. bitmask that represents the
* different engines. See debugfs-driver-habanalabs for
* details.
+ * @boot_error_status_mask: contains a mask of the device boot error status.
+ * Each bit represents a different error, according to
+ * the defines in hl_boot_if.h. If the bit is cleared,
+ * the error will be ignored by the driver during
+ * device initialization. Mainly used to debug and
+ * workaround firmware bugs
* @in_reset: is device in reset flow.
* @curr_pll_profile: current PLL profile.
* @card_type: Various ASICs have several card types. This indicates the card
@@ -2077,6 +2083,7 @@ struct hl_device {
u64 timeout_jiffies;
u64 max_power;
u64 clock_gating_mask;
+ u64 boot_error_status_mask;
atomic_t in_reset;
enum hl_pll_frequency curr_pll_profile;
enum cpucp_card_types card_type;
diff --git a/drivers/misc/habanalabs/common/habanalabs_drv.c b/drivers/misc/habanalabs/common/habanalabs_drv.c
index 7135f1e03864..64d1530db985 100644
--- a/drivers/misc/habanalabs/common/habanalabs_drv.c
+++ b/drivers/misc/habanalabs/common/habanalabs_drv.c
@@ -30,6 +30,7 @@ static DEFINE_MUTEX(hl_devs_idr_lock);
static int timeout_locked = 30;
static int reset_on_lockup = 1;
static int memory_scrub = 1;
+static ulong boot_error_status_mask = ULONG_MAX;
module_param(timeout_locked, int, 0444);
MODULE_PARM_DESC(timeout_locked,
@@ -43,6 +44,10 @@ module_param(memory_scrub, int, 0444);
MODULE_PARM_DESC(memory_scrub,
"Scrub device memory in various states (0 = no, 1 = yes, default yes)");
+module_param(boot_error_status_mask, ulong, 0444);
+MODULE_PARM_DESC(boot_error_status_mask,
+ "Mask of the error status during device CPU boot (If bitX is cleared then error X is masked. Default all 1's)");
+
#define PCI_VENDOR_ID_HABANALABS 0x1da3
#define PCI_IDS_GOYA 0x0001
@@ -319,6 +324,8 @@ int create_hdev(struct hl_device **dev, struct pci_dev *pdev,
hdev->major = hl_major;
hdev->reset_on_lockup = reset_on_lockup;
hdev->memory_scrub = memory_scrub;
+ hdev->boot_error_status_mask = boot_error_status_mask;
+
hdev->pldm = 0;
set_driver_behavior_per_device(hdev);
--
2.25.1
prev parent reply other threads:[~2021-04-17 9:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-17 9:20 [PATCH 1/3] habanalabs: skip reading f/w errors on bad status Oded Gabbay
2021-04-17 9:20 ` [PATCH 2/3] habanalabs: change error level of security not ready Oded Gabbay
2021-04-17 9:20 ` Oded Gabbay [this message]
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