- 24 Oct, 2022 2 commits
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Andrzej Hajda authored
This patch replaces all occurences of the form intel_uncore_write(reg, intel_uncore_read(reg) OP val) with intel_uncore_rmw. Signed-off-by:
Andrzej Hajda <andrzej.hajda@intel.com> Reviewed-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
Andi Shyti <andi.shyti@linux.intel.com> Signed-off-by:
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Andrzej Hajda authored
This patch replaces all occurences of the form intel_uncore_write(reg, intel_uncore_read(reg) OP val) with intel_uncore_rmw. Signed-off-by:
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- 21 Oct, 2022 1 commit
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Matt Roper authored
A misplaced closing parenthesis caused the groupid/instanceid values to be considered part of the ternary operator's condition instead of being OR'd into the resulting value. Fixes: f32898c9 ("drm/i915/xelpg: Add multicast steering") Reported-by:
kernel test robot <lkp@intel.com> Signed-off-by:
Matt Roper <matthew.d.roper@intel.com> Reviewed-by:
Arun R Murthy <arun.r.murthy@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221019222437.3035182-1-matthew.d.roper@intel.com
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- 20 Oct, 2022 4 commits
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Tvrtko Ursulin authored
Since a7c01fa9 ("signal: break out of wait loops on kthread_stop()") kthread_stop() started asserting a pending signal which wreaks havoc with a few of our selftests. Mainly because they are not fully expecting to handle signals, but also cutting the intended test runtimes short due signal_pending() now returning true (via __igt_timeout), which therefore breaks both the patterns of: kthread_run() ..sleep for igt_timeout_ms to allow test to exercise stuff.. kthread_stop() And check for errors recorded in the thread. And also: Main thread | Test thread ---------------+------------------------------ kthread_run() | kthread_stop() | do stuff until __igt_timeout | -- exits early due signal -- Where this kthread_stop() was assume would have a "join" semantics, which it would have had if not the new signal assertion issue. To recap, threads are now likely to catch a previously impossible ERESTARTSYS or EINTR, marking the test as failed, or have a pointlessly short run time. To work around this start using kthread_work(er) API which provides an explicit way of waiting for threads to exit. And for cases where parent controls the test duration we add explicit signaling which threads will now use instead of relying on kthread_should_stop(). Signed-off-by:
Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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Ville Syrjälä authored
The fact that LMEMBAR is BAR2 should be of no real interest to anyone. So use the name of the BAR rather than its index. Signed-off-by:
Matthew Auld <matthew.auld@intel.com>
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Ville Syrjälä authored
We use all kinds of weird names for our base address registers. Take the names from the spec and stick to them to avoid confusing everyone. The only exceptions are IOBAR and LMEMBAR since naming them IOBAR_BAR and LMEMBAR_BAR looks too funny, and yet I think that adding the _BAR to GTTMMADR & co. (which don't have one in the spec name) does make it more clear what they are. And IOBAR vs. GTTMMADR_BAR also looks a bit too inconsistent for my taste. v2: Fix gvt build v3: Add GEN2_IO_BAR for completeness Signed-off-by:
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Ville Syrjälä authored
We have the same code to determine the MMIO BAR in two places. Collect it to a single place. Signed-off-by:
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- 19 Oct, 2022 1 commit
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Nirmoy Das authored
Currently i915_ttm_to_gem() returns NULL for ttm ghost object which makes it unclear when we should add a NULL check for a caller of i915_ttm_to_gem() as ttm ghost objects are expected behaviour for certain cases. Create a separate function to detect ttm ghost object and use that in places where we expect a ghost obj from ttm. Signed-off-by:
Nirmoy Das <nirmoy.das@intel.com> Reviewed-by:
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- 18 Oct, 2022 1 commit
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Matt Roper authored
The bspec was just updated with a correction to the forcewake domain required when accessing registers in the CCS engine ranges (0x1a000 - 0x1ffff and 0x26000 - 0x27fff) on PVC; these ranges require a wake on the RENDER domain, not the GT domain. Bspec: 67609 Signed-off-by:
Harish Chegondi <harish.chegondi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221014233004.1053678-1-matthew.d.roper@intel.com
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- 17 Oct, 2022 22 commits
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Daniele Ceraolo Spurio authored
We're observing sporadic HuC delayed load timeouts in CI, due to mei_pxp binding completing later than we expected. HuC is still loaded when the bind occurs, but in the meantime i915 has started allowing submission to the VCS engines even if HuC is not there. In most of the cases I've observed, the timeout was due to the init/resume of another driver between i915 and mei hitting errors and thus adding an extra delay, but HuC was still loaded before userspace could submit, because the whole resume process time was increased by the delays. Given that there is no upper bound to the delay that can be introduced by other drivers, I've reached the following compromise with the media team: 1) i915 is going to bump the timeout to 5s, to reduce the probability of reaching it. We still expect HuC to be loaded before userspace starts submitting, so increasing the timeout should have no impact on normal operations, but in case something weird happens we don't want to stall video submissions for too long. 2) The media driver will cope with the failing submissions that manage to go through between i915 init/resume complete and HuC loading, if any ever happen. This could cause a small corruption of video playback immediately after a resume (we should be safe on boot because the media driver polls the HUC_STATUS ioctl before starting submissions). Since we're accepting the timeout as a valid outcome, I'm also reducing the print verbosity from error to notice. v2: use separate prints for MEI GSC and MEI PXP init timeouts (John) v3: add MISSING_CASE to the if-else chain (John) References: https://gitlab.freedesktop.org/drm/intel/-/issues/7033 Fixes: 27536e03 ("drm/i915/huc: track delayed HuC load with a fence") Signed-off-by:
Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Tony Ye <tony.ye@intel.com> Cc: John Harrison <john.c.harrison@intel.com> Reviewed-by:
John Harrison <John.C.Harrison@Intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221013203245.1801788-1-daniele.ceraolospurio@intel.com
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Matt Roper authored
MTL's media IP (Xe_LPM+) only has a single type of steering ("OAADDRM") which selects between media slice 0 and media slice 1. We'll always steer to media slice 0 unless it is fused off (which is the case when VD0, VE0, and SFC0 are all reported as unavailable). Bspec: 67789 Signed-off-by:Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221014230239.1023689-15-matthew.d.roper@intel.com
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Matt Roper authored
MTL's graphics IP (Xe_LPG) once again changes the multicast register types and steering details. Key changes from past platforms: * The number of instances of some MCR types (NODE, OAAL2, and GAM) vary according to the MTL subplatform and cannot be read from fuse registers. However steering to instance #0 will always provided a non-terminated value, so we can lump these all into a single "instance0" table. * The MCR steering register (and its bitfields) has changed. Unlike past platforms, we will be explicitly steering all types of MCR accesses, including those for "SLICE" and "DSS" ranges; we no longer rely on implicit steering. On previous platforms, various hardware/firmware agents that needed to access registers typically had their own steering control registers, allowing them to perform multicast steering without clobbering the CPU/kernel steering. Starting with MTL, more of these agents now share a single steering register (0xFD4) and it is no longer safe for us to assume that the value will remain unchanged from how we initialized it during startup. There is also a slight chance of race conditions between the driver and a hardware/firmware agent, so the hardware provides a semaphore register that can be used to coordinate access to the steering register. Support for the semaphore register will be introduced in a future patch. v2: - Use Xe_LPG terminology instead of "MTL 3D" since it's the IP version we're matching on now rather than the platform. - Don't combine l3bank and mslice masks into a union. It's not related to the other changes here and we might still need both of them on some future platform. - Separate debug dumping of steering settings to a separate helper function. (Tvrtko) - Update debug dumping to include DSS ranges (and future-proof it so that any new ranges added on future platforms will also be dumped). - Restore MULTICAST bit at the end of rw_with_mcr_steering_fw() if we cleared it. Also force the MULTICAST bit to true at the beginning of multicast writes just to be safe. (Bala) Bspec: 67788, 67112 Cc: Radhakrishna Sripada <radhakrishna.sripada@intel.com> Cc: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com> Signed-off-by:
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Matt Roper authored
Rather than treating multicast registers as 'i915_reg_t' let's define them as a completely new type. This will allow the compiler to help us make sure we're using multicast-aware functions to operate on multicast registers. This plan does break down a bit in places where we're just maintaining heterogeneous lists of registers (e.g., various MMIO whitelists used by perf, GVT, etc.) rather than performing reads/writes. We only really care about the offset in those cases, so for now we can "cast" the registers as non-MCR, leaving us with a list of i915_reg_t's, but we may want to look for better ways to store mixed collections of i915_reg_t and i915_mcr_reg_t in the future. v2: - Add TLB invalidation registers v3: - Make type checking of i915_mmio_reg_offset() stricter. It will accept either i915_reg_t or i915_mcr_reg_t, but will now raise a compile error if any other type is passed, even if that type contains a 'reg' field. (Jani) - Drop a ton of GVT changes; allowing i915_mmio_reg_offset() to take either an i915_reg_t or an i915_mcr_reg_t means that the huge lists of MMIO_D*() macros used in GVT will continue to work without modification. We need only make changes to structures that have an explicit i915_reg_t in them now. Cc: Jani Nikula <jani.nikula@linux.intel.com> Signed-off-by:
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Matt Roper authored
Let's be more explicit about which of our workarounds are updating MCR registers. Signed-off-by:
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Matt Roper authored
MCR registers can be placed on the GuC's save/restore list, but at the moment they are always handled in a multicast manner (i.e., the GuC reads one instance to save the value and then does a multicast write to restore that single value to all instances). In the future the GuC will probably give us an alternate interface to do unicast per-instance save/restore operations, so we should be very clear about which registers on the list are MCR registers (and in the future which save/restore behavior we want for them). Signed-off-by:
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Matt Roper authored
Rather than relying on the implicit behavior of intel_uncore_*() functions, let's always use the intel_gt_mcr_*() functions to operate on multicast/replicated registers. v2: - Add TLB invalidation registers v3: - Switch more uncore operations in mmio_invalidate_full() to MCR operations for Xe_HP. (Bala) Cc: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com> Signed-off-by:
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Matt Roper authored
Rather than using the same _MMIO() macro to define MCR registers as singleton registers, let's use a new MCR_REG() macro to make it clear that these registers are special and should be handled accordingly. For now MCR_REG() will still generate an i915_reg_t with the given offset, but we'll change that in future patches. Bspec: 66673, 66696, 66534, 67609 Signed-off-by:
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Matt Roper authored
Xe_HP has some MCR registers that need to be polled for completion of operations like TLB invalidation. Those registers are in the GAM range, which rolls up the status from each unit into the 'primary' instance's value. This makes it useful to have a dedicated 'wait for register' function that handles this on MCR registers, similar to the __intel_wait_for_register_fw() function we already have for regular registers. Signed-off-by:
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Matt Roper authored
On Xe_HP the fault registers are now in a multicast register range. However as part of the GAM these registers follow special rules and we need only read from the "primary" GAM's instance to get the information we need. So a single intel_gt_mcr_read_any() (which will automatically steer to the primary GAM) is sufficient; we don't need to loop over each instance of the MCR register. v2: - Update more instances of fault registers. (Bala) Signed-off-by:
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Matt Roper authored
There are cases where we wish to read from any non-terminated MCR register instance (or the primary instance in the case of GAM ranges), clear/set some bits, and then write the value back out to the register in a multicast manner. Adding a "multicast RMW" will avoid the need to open-code this. v2: - Return a u32 to align with the recent change to intel_uncore_rmw. Signed-off-by:
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Matt Roper authored
We have a few registers that have existed for several hardware generations, but are only used by the driver on Xe_HP and beyond. In cases where the Xe_HP version of the register is now replicated and uses multicast behavior, but earlier generations were singleton, let's change the register prefix to "XEHP_" to help clarify that we're using the newer multicast form of the register. Signed-off-by:
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Matt Roper authored
Let's drop a few register definitions that are unused anywhere in the driver today. Since the referenced offsets are part of what is now considered a multicast register region, the current definitions would not be correct for use on any future platform. Signed-off-by:
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Matt Roper authored
Starting in Xe_HP, several registers our driver works with have been converted from singleton registers into replicated registers with multicast behavior. Although the registers are still located at the same MMIO offsets as on previous platforms, let's duplicate the register definitions in preparation for upcoming patches that will handle multicast registers in a special manner. The registers that are now replicated on Xe_HP are: * PAT_INDEX (mslice replication) * FF_MODE2 (gslice replication) * COMMON_SLICE_CHICKEN3 (gslice replication) * SLICE_COMMON_ECO_CHICKEN1 (gslice replication) * SLICE_UNIT_LEVEL_CLKGATE (gslice replication) * LNCFCMOCS (lncf replication) Note that there are a couple places in selftest_mocs.c where the gen9 version of LNCFCMOCS is still used without regards for which platform we're on. Those cases are just doing an offset lookup and not issuing any CPU reads/writes of the register, so the potentially multicast nature of the register doesn't come into play. v2: - Add commit message note about the unconditional GEN9_LNCFCMOCS usage in selftest_mocs. (Bala) - Include some additional TLB registers. Bspec: 66534 Cc: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com> Signed-off-by:
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Matt Roper authored
Gen8 was the first time our hardware had multicast registers (or at least the first time the multicast nature was exposed and MMIO accesses could be steered). There are some registers that transitioned from singleton behavior to multicast during the gen7 -> gen8 transition; let's duplicate the register definitions for those registers in preparation for upcoming patches that will handle MCR registers in a special manner. The registers adjusted are: * MISCCPCTL * SAMPLER_INSTDONE * ROW_INSTDONE * ROW_CHICKEN2 * HALF_SLICE_CHICKEN1 * HALF_SLICE_CHICKEN3 v2: - Use the gen8 version of HALF_SLICE_CHICKEN3 in GVT's gen9 engine MMIO list. (Bala) - Update to the gen8 version of MISCCPCTL in a couple new workarounds that were recently added for DG2/PVC. (Bala) Signed-off-by:
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Dale B Stimson authored
Extend hwmon power/energy for XEHPSDV especially per gt level energy usage. v2: Update to latest HWMON spec (Ashutosh) v3: Fix review comments (Ashutosh) v4: Fix review comments (Anshuman) v5: s/hwmon_device_register_with_info/ devm_hwmon_device_register_with_info/ (Ashutosh) v6: Change contact to intel-gfx (Rodrigo) GEN12_RPSTAT1 is available for all Gen12+ (Andi) Signed-off-by:Ashutosh Dixit <ashutosh.dixit@intel.com> Signed-off-by:
Dale B Stimson <dale.b.stimson@intel.com> Signed-off-by:
Badal Nilawar <badal.nilawar@intel.com> Acked-by:
Guenter Roeck <linux@roeck-us.net> Reviewed-by:
Anshuman Gupta <anshuman.gupta@intel.com> Reviewed-by:
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Ashutosh Dixit authored
Expose power1_max_interval, that is the tau corresponding to PL1, as a custom hwmon attribute. Some bit manipulation is needed because of the format of PKG_PWR_LIM_1_TIME in GT0_PACKAGE_RAPL_LIMIT register (1.x * power(2,y)). v2: Update date and kernel version in Documentation (Badal) v3: Cleaned up hwm_power1_max_interval_store() (Badal) v4: - Fixed review comments (Anshuman) - In hwm_power1_max_interval_store() get PKG_MAX_WIN from pkg_power_sku when it is valid (Ashutosh) - KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko) v5: On some of the DGFX setups it is seen that although pkg_power_sku is valid the field PKG_WIN_MAX is not populated. So it is decided to stick to default value of PKG_WIN_MAX (Ashutosh) v6: Change contact to intel-gfx (Rodrigo) Fixed variable types in hwm_power1_max_interval_store (Andi) Documented PKG_MAX_WIN_DEFAULT (Andi) Removed else in hwm_attributes_visible (Andi) Signed-off-by: -
Ashutosh Dixit authored
Expose the card reactive critical (I1) power. I1 is exposed as power1_crit in microwatts (typically for client products) or as curr1_crit in milliamperes (typically for server). v2: Add curr1_crit functionality (Ashutosh) v3: Use HWMON_CHANNEL_INFO to define power1_crit, curr1_crit (Badal) v4: Use hwm_ prefix for static functions (Ashutosh) v5: KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko) v6: Change contact to intel-gfx (Rodrigo) Cc: Sujaritha Sundaresan <sujaritha.sundaresan@intel.com> Signed-off-by:
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Dale B Stimson authored
Use i915 HWMON to display device level energy input. v2: Updated the date and kernel version in feature description v3: - Cleaned up hwm_energy function and removed unused function i915_hwmon_energy_status_get (Ashutosh) v4: KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko) v5: Change contact to intel-gfx (Rodrigo) Change return type of hwm_energy to void (Andi) Signed-off-by:Riana Tauro <riana.tauro@intel.com> Signed-off-by:
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Dale B Stimson authored
Use i915 HWMON to display/modify dGfx power PL1 limit and TDP setting. v2: - Fix review comments (Ashutosh) - Do not restore power1_max upon module unload/load sequence because on production systems modules are always loaded and not unloaded/reloaded (Ashutosh) - Fix review comments (Jani) - Remove endianness conversion (Ashutosh) v3: Add power1_rated_max (Ashutosh) v4: - Use macro HWMON_CHANNEL_INFO to define power channel (Guenter) - Update the date and kernel version in Documentation (Badal) v5: Use hwm_ prefix for static functions (Ashutosh) v6: Fix review comments (Ashutosh) v7: - Define PCU_PACKAGE_POWER_SKU for DG1,DG2 and move PKG_PKG_TDP to intel_mchbar_regs.h (Anshuman) - KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko) v8: Change contact to intel-gfx (Rodrigo) Minor change to val_sku_unit init (Andi) Cc: Guenter Roeck <linux@roeck-us.net> Signed-off-by: -
Riana Tauro authored
Use i915 HWMON subsystem to display current input voltage. v2: - Updated date and kernel version in feature description - Fixed review comments (Ashutosh) v3: Use macro HWMON_CHANNEL_INFO to define hwmon channel (Guenter) v4: - Fixed review comments (Ashutosh) - Use hwm_ prefix for static functions (Ashutosh) v5: Added unit of voltage as millivolts (Ashutosh) v6: KernelVersion: 6.2, Date: February 2023 in doc (Tvrtko) v7: Change contact to intel-gfx (Rodrigo) GEN12_RPSTAT1 is available for all Gen12+ (Andi) Added Documentation/ABI/testing/sysfs-driver-intel-i915-hwmon to MAINTAINERS Cc: Guenter Roeck <linux@roeck-us.net> Cc: Anshuman Gupta <anshuman.gupta@intel.com> Signed-off-by: -
Dale B Stimson authored
The i915 HWMON module will be used to expose voltage, power and energy values for dGfx. Here we set up i915 hwmon infrastructure including i915 hwmon registration, basic data structures and functions. v2: - Create HWMON infra patch (Ashutosh) - Fixed review comments (Jani) - Remove "select HWMON" from i915/Kconfig (Jani) v3: Use hwm_ prefix for static functions (Ashutosh) v4: s/#ifdef CONFIG_HWMON/#if IS_REACHABLE(CONFIG_HWMON)/ since the former doesn't work if hwmon is compiled as a module (Guenter) v5: Fixed review comments (Jani) v6: s/kzalloc/devm_kzalloc/ (Andi) v7: s/hwmon_device_register_with_info/ devm_hwmon_device_register_with_info/ (Ashutosh) Cc: Guenter Roeck <linux@roeck-us.net> Signed-off-by:
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- 14 Oct, 2022 2 commits
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Matthew Auld authored
On some platforms we potentially have different alignment restrictions depending on the memory type. We also now have different alignment restrictions for the same region across different kernel versions. Extend the region query to return the minimum required GTT alignment. Testcase: igt@gem_create@create-ext-placement-alignment Testcase: igt@i915_query@query-regions-sanity-check Suggested-by:
Lionel Landwerlin <lionel.g.landwerlin@intel.com> Signed-off-by:
Jordan Justen <jordan.l.justen@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221004114915.221708-2-matthew.auld@intel.com
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Matthew Auld authored
It turns out that on production DG2/ATS HW we should have support for PS64. This feature allows to provide a 64K TLB hint at the PTE level, which is a lot more flexible than the current method of enabling 64K GTT pages for the entire page-table, since that leads to all kinds of annoying restrictions, as documented in: commit caa574ff Author: Matthew Auld <matthew.auld@intel.com> Date: Sat Feb 19 00:17:49 2022 +0530 drm/i915/uapi: document behaviour for DG2 64K support On discrete platforms like DG2, we need to support a minimum page size of 64K when dealing with device local-memory. This is quite tricky for various reasons, so try to document the new implicit uapi for this. With PS64, we can now drop the 2M GTT alignment restriction, and instead only require 64K or larger when dealing with lmem. We still use the compact-pt layout when possible, but only when we are certain that this doesn't interfere with userspace. Note that this is a change in uAPI behaviour, but hopefully shouldn't be a concern (IGT is at least able to autodetect the alignment), since we are only making the GTT alignment constraint less restrictive. Based on a patch from CQ Tang. v2: update the comment wrt scratch page v3: (Nirmoy) - Fix the selftest to actually use the random size, plus some comment improvements, also drop the rem stuff. Reported-by:
Michal Mrozek <michal.mrozek@intel.com> Signed-off-by:
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- 12 Oct, 2022 1 commit
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Andi Shyti authored
Commit 3e7abf81 ("drm/i915: Extract GT render power state management") removes the "trace_intel_gpu_freq_change()" trace points but their definition was left without users. Remove it. Suggested-by:
Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Signed-off-by:
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- 10 Oct, 2022 5 commits
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Thomas Hellström authored
Commit 39a2bd34 ("drm/i915: Use the vma resource as argument for gtt binding / unbinding") introduced a regression that due to the vma resource tracking of the binding state, dpt ptes were not correctly repopulated. Fix this by clearing the vma resource state before repopulating. The state will subsequently be restored by the bind_vma operation. Fixes: 39a2bd34 ("drm/i915: Use the vma resource as argument for gtt binding / unbinding") Signed-off-by:
Thomas Hellström <thomas.hellstrom@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220912121957.31310-1-thomas.hellstrom@linux.intel.com Cc: Matthew Auld <matthew.auld@intel.com> Cc: intel-gfx@lists.freedesktop.org Cc: <stable@vger.kernel.org> # v5.18+ Reported-and-tested-by:
Kevin Boulain <kevinboulain@gmail.com> Tested-by:
David de Sousa <davidesousa@gmail.com> Reviewed-by:
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Vinay Belgaumkar authored
Read the values stored in the SLPC structures. Remove the fields that are no longer valid (like RPS interrupts) as well. v2: Move all functionality changes to this patch (Jani) v3: Fix compile warning and if condition (Jani) Signed-off-by:
Vinay Belgaumkar <vinay.belgaumkar@intel.com> Reviewed-by:
Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by:
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Vinay Belgaumkar authored
Move it to the RPS source file. v2: Separate out code movement and functional changes (Jani) Signed-off-by:
Jani Nikula <jani.nikula@intel.com> Signed-off-by:
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Colin Ian King authored
The assignment to variable taken is redundant and so it can be removed as well as the variable too. Cleans up clang-scan build warnings: warning: Although the value stored to 'taken' is used in the enclosing expression, the value is never actually read from 'taken' [deadcode.DeadStores] Signed-off-by:
Colin Ian King <colin.i.king@gmail.com> Reviewed-by:
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Colin Ian King authored
The variable ret is being assigned with a value that is never read both before and after a while-loop. The variable is being re-assigned inside the while-loop and afterwards on the call to the function i915_gem_object_lock_interruptible. Remove the redundants assignments. Cleans up clang scan-build warnings: warning: Although the value stored to 'ret' is used in the enclosing expression, the value is never actually read from 'ret' [deadcode.DeadStores] warning: Value stored to 'ret' is never read [deadcode.DeadStores] Signed-off-by:
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- 06 Oct, 2022 1 commit
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Matthew Auld authored
Restore the previous behaviour here where we compare the pci_resource_len() with the actual lmem_size, and not the dsm size, since dsm here is just some subset snipped off the end of the lmem. Otherwise we will incorrectly report an io_size > 0 on small-bar systems. It doesn't looks like MTL is expecting small-bar with its stolen memory, based on: GEM_BUG_ON(pci_resource_len(pdev, GEN12_LMEM_BAR) != SZ_256M) GEM_BUG_ON((dsm_size + SZ_8M) > lmem_size) So just move the HAS_BAR2_SMEM_STOLEN() check first, which then ignores the small bar part, and we can go back to checking lmem_size against the BAR size. Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/7007 Fixes: dbb2ffbf ("drm/i915/mtl: enable local stolen memory") Signed-off-by:
Lucas De Marchi <lucas.demarchi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221005153148.758822-2-matthew.auld@intel.com
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