diff options
Diffstat (limited to 'drivers/gpu/drm/imagination/pvr_device.c')
| -rw-r--r-- | drivers/gpu/drm/imagination/pvr_device.c | 323 |
1 files changed, 322 insertions, 1 deletions
diff --git a/drivers/gpu/drm/imagination/pvr_device.c b/drivers/gpu/drm/imagination/pvr_device.c index abcdf733f57b..05e382cacb27 100644 --- a/drivers/gpu/drm/imagination/pvr_device.c +++ b/drivers/gpu/drm/imagination/pvr_device.c @@ -2,19 +2,31 @@ /* Copyright (c) 2023 Imagination Technologies Ltd. */ #include "pvr_device.h" +#include "pvr_device_info.h" + +#include "pvr_fw.h" +#include "pvr_rogue_cr_defs.h" #include <drm/drm_print.h> +#include <linux/bitfield.h> #include <linux/clk.h> #include <linux/compiler_attributes.h> #include <linux/compiler_types.h> #include <linux/dma-mapping.h> #include <linux/err.h> +#include <linux/firmware.h> #include <linux/gfp.h> +#include <linux/interrupt.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/slab.h> #include <linux/stddef.h> #include <linux/types.h> +#include <linux/workqueue.h> + +/* Major number for the supported version of the firmware. */ +#define PVR_FW_VERSION_MAJOR 1 /** * pvr_device_reg_init() - Initialize kernel access to a PowerVR device's @@ -101,6 +113,209 @@ static int pvr_device_clk_init(struct pvr_device *pvr_dev) } /** + * pvr_build_firmware_filename() - Construct a PowerVR firmware filename + * @pvr_dev: Target PowerVR device. + * @base: First part of the filename. + * @major: Major version number. + * + * A PowerVR firmware filename consists of three parts separated by underscores + * (``'_'``) along with a '.fw' file suffix. The first part is the exact value + * of @base, the second part is the hardware version string derived from @pvr_fw + * and the final part is the firmware version number constructed from @major with + * a 'v' prefix, e.g. powervr/rogue_4.40.2.51_v1.fw. + * + * The returned string will have been slab allocated and must be freed with + * kfree(). + * + * Return: + * * The constructed filename on success, or + * * Any error returned by kasprintf(). + */ +static char * +pvr_build_firmware_filename(struct pvr_device *pvr_dev, const char *base, + u8 major) +{ + struct pvr_gpu_id *gpu_id = &pvr_dev->gpu_id; + + return kasprintf(GFP_KERNEL, "%s_%d.%d.%d.%d_v%d.fw", base, gpu_id->b, + gpu_id->v, gpu_id->n, gpu_id->c, major); +} + +static void +pvr_release_firmware(void *data) +{ + struct pvr_device *pvr_dev = data; + + release_firmware(pvr_dev->fw_dev.firmware); +} + +/** + * pvr_request_firmware() - Load firmware for a PowerVR device + * @pvr_dev: Target PowerVR device. + * + * See pvr_build_firmware_filename() for details on firmware file naming. + * + * Return: + * * 0 on success, + * * Any error returned by pvr_build_firmware_filename(), or + * * Any error returned by request_firmware(). + */ +static int +pvr_request_firmware(struct pvr_device *pvr_dev) +{ + struct drm_device *drm_dev = &pvr_dev->base; + char *filename; + const struct firmware *fw; + int err; + + filename = pvr_build_firmware_filename(pvr_dev, "powervr/rogue", + PVR_FW_VERSION_MAJOR); + if (IS_ERR(filename)) + return PTR_ERR(filename); + + /* + * This function takes a copy of &filename, meaning we can free our + * instance before returning. + */ + err = request_firmware(&fw, filename, pvr_dev->base.dev); + if (err) { + drm_err(drm_dev, "failed to load firmware %s (err=%d)\n", + filename, err); + goto err_free_filename; + } + + drm_info(drm_dev, "loaded firmware %s\n", filename); + kfree(filename); + + pvr_dev->fw_dev.firmware = fw; + + return devm_add_action_or_reset(drm_dev->dev, pvr_release_firmware, pvr_dev); + +err_free_filename: + kfree(filename); + + return err; +} + +/** + * pvr_load_gpu_id() - Load a PowerVR device's GPU ID (BVNC) from control registers. + * + * Sets struct pvr_dev.gpu_id. + * + * @pvr_dev: Target PowerVR device. + */ +static void +pvr_load_gpu_id(struct pvr_device *pvr_dev) +{ + struct pvr_gpu_id *gpu_id = &pvr_dev->gpu_id; + u64 bvnc; + + /* + * Try reading the BVNC using the newer (cleaner) method first. If the + * B value is zero, fall back to the older method. + */ + bvnc = pvr_cr_read64(pvr_dev, ROGUE_CR_CORE_ID__PBVNC); + + gpu_id->b = PVR_CR_FIELD_GET(bvnc, CORE_ID__PBVNC__BRANCH_ID); + if (gpu_id->b != 0) { + gpu_id->v = PVR_CR_FIELD_GET(bvnc, CORE_ID__PBVNC__VERSION_ID); + gpu_id->n = PVR_CR_FIELD_GET(bvnc, CORE_ID__PBVNC__NUMBER_OF_SCALABLE_UNITS); + gpu_id->c = PVR_CR_FIELD_GET(bvnc, CORE_ID__PBVNC__CONFIG_ID); + } else { + u32 core_rev = pvr_cr_read32(pvr_dev, ROGUE_CR_CORE_REVISION); + u32 core_id = pvr_cr_read32(pvr_dev, ROGUE_CR_CORE_ID); + u16 core_id_config = PVR_CR_FIELD_GET(core_id, CORE_ID_CONFIG); + + gpu_id->b = PVR_CR_FIELD_GET(core_rev, CORE_REVISION_MAJOR); + gpu_id->v = PVR_CR_FIELD_GET(core_rev, CORE_REVISION_MINOR); + gpu_id->n = FIELD_GET(0xFF00, core_id_config); + gpu_id->c = FIELD_GET(0x00FF, core_id_config); + } +} + +/** + * pvr_set_dma_info() - Set PowerVR device DMA information + * @pvr_dev: Target PowerVR device. + * + * Sets the DMA mask and max segment size for the PowerVR device. + * + * Return: + * * 0 on success, + * * Any error returned by PVR_FEATURE_VALUE(), or + * * Any error returned by dma_set_mask(). + */ + +static int +pvr_set_dma_info(struct pvr_device *pvr_dev) +{ + struct drm_device *drm_dev = from_pvr_device(pvr_dev); + u16 phys_bus_width; + int err; + + err = PVR_FEATURE_VALUE(pvr_dev, phys_bus_width, &phys_bus_width); + if (err) { + drm_err(drm_dev, "Failed to get device physical bus width\n"); + return err; + } + + err = dma_set_mask(drm_dev->dev, DMA_BIT_MASK(phys_bus_width)); + if (err) { + drm_err(drm_dev, "Failed to set DMA mask (err=%d)\n", err); + return err; + } + + dma_set_max_seg_size(drm_dev->dev, UINT_MAX); + + return 0; +} + +/** + * pvr_device_gpu_init() - GPU-specific initialization for a PowerVR device + * @pvr_dev: Target PowerVR device. + * + * The following steps are taken to ensure the device is ready: + * + * 1. Read the hardware version information from control registers, + * 2. Initialise the hardware feature information, + * 3. Setup the device DMA information, + * 4. Setup the device-scoped memory context, and + * 5. Load firmware into the device. + * + * Return: + * * 0 on success, + * * -%ENODEV if the GPU is not supported, + * * Any error returned by pvr_set_dma_info(), + * * Any error returned by pvr_memory_context_init(), or + * * Any error returned by pvr_request_firmware(). + */ +static int +pvr_device_gpu_init(struct pvr_device *pvr_dev) +{ + int err; + + pvr_load_gpu_id(pvr_dev); + + err = pvr_request_firmware(pvr_dev); + if (err) + return err; + + err = pvr_fw_validate_init_device_info(pvr_dev); + if (err) + return err; + + if (PVR_HAS_FEATURE(pvr_dev, meta)) + pvr_dev->fw_dev.processor_type = PVR_FW_PROCESSOR_TYPE_META; + else if (PVR_HAS_FEATURE(pvr_dev, mips)) + pvr_dev->fw_dev.processor_type = PVR_FW_PROCESSOR_TYPE_MIPS; + else if (PVR_HAS_FEATURE(pvr_dev, riscv_fw_processor)) + pvr_dev->fw_dev.processor_type = PVR_FW_PROCESSOR_TYPE_RISCV; + else + return -EINVAL; + + return pvr_set_dma_info(pvr_dev); +} + +/** * pvr_device_init() - Initialize a PowerVR device * @pvr_dev: Target PowerVR device. * @@ -130,7 +345,12 @@ pvr_device_init(struct pvr_device *pvr_dev) return err; /* Map the control registers into memory. */ - return pvr_device_reg_init(pvr_dev); + err = pvr_device_reg_init(pvr_dev); + if (err) + return err; + + /* Perform GPU-specific initialization steps. */ + return pvr_device_gpu_init(pvr_dev); } /** @@ -145,3 +365,104 @@ pvr_device_fini(struct pvr_device *pvr_dev) * the initialization stages in pvr_device_init(). */ } + +bool +pvr_device_has_uapi_quirk(struct pvr_device *pvr_dev, u32 quirk) +{ + switch (quirk) { + case 47217: + return PVR_HAS_QUIRK(pvr_dev, 47217); + case 48545: + return PVR_HAS_QUIRK(pvr_dev, 48545); + case 49927: + return PVR_HAS_QUIRK(pvr_dev, 49927); + case 51764: + return PVR_HAS_QUIRK(pvr_dev, 51764); + case 62269: + return PVR_HAS_QUIRK(pvr_dev, 62269); + default: + return false; + }; +} + +bool +pvr_device_has_uapi_enhancement(struct pvr_device *pvr_dev, u32 enhancement) +{ + switch (enhancement) { + case 35421: + return PVR_HAS_ENHANCEMENT(pvr_dev, 35421); + case 42064: + return PVR_HAS_ENHANCEMENT(pvr_dev, 42064); + default: + return false; + }; +} + +/** + * pvr_device_has_feature() - Look up device feature based on feature definition + * @pvr_dev: Device pointer. + * @feature: Feature to look up. Should be one of %PVR_FEATURE_*. + * + * Returns: + * * %true if feature is present on device, or + * * %false if feature is not present on device. + */ +bool +pvr_device_has_feature(struct pvr_device *pvr_dev, u32 feature) +{ + switch (feature) { + case PVR_FEATURE_CLUSTER_GROUPING: + return PVR_HAS_FEATURE(pvr_dev, cluster_grouping); + + case PVR_FEATURE_COMPUTE_MORTON_CAPABLE: + return PVR_HAS_FEATURE(pvr_dev, compute_morton_capable); + + case PVR_FEATURE_FB_CDC_V4: + return PVR_HAS_FEATURE(pvr_dev, fb_cdc_v4); + + case PVR_FEATURE_GPU_MULTICORE_SUPPORT: + return PVR_HAS_FEATURE(pvr_dev, gpu_multicore_support); + + case PVR_FEATURE_ISP_ZLS_D24_S8_PACKING_OGL_MODE: + return PVR_HAS_FEATURE(pvr_dev, isp_zls_d24_s8_packing_ogl_mode); + + case PVR_FEATURE_S7_TOP_INFRASTRUCTURE: + return PVR_HAS_FEATURE(pvr_dev, s7_top_infrastructure); + + case PVR_FEATURE_TESSELLATION: + return PVR_HAS_FEATURE(pvr_dev, tessellation); + + case PVR_FEATURE_TPU_DM_GLOBAL_REGISTERS: + return PVR_HAS_FEATURE(pvr_dev, tpu_dm_global_registers); + + case PVR_FEATURE_VDM_DRAWINDIRECT: + return PVR_HAS_FEATURE(pvr_dev, vdm_drawindirect); + + case PVR_FEATURE_VDM_OBJECT_LEVEL_LLS: + return PVR_HAS_FEATURE(pvr_dev, vdm_object_level_lls); + + case PVR_FEATURE_ZLS_SUBTILE: + return PVR_HAS_FEATURE(pvr_dev, zls_subtile); + + /* Derived features. */ + case PVR_FEATURE_CDM_USER_MODE_QUEUE: { + u8 cdm_control_stream_format = 0; + + PVR_FEATURE_VALUE(pvr_dev, cdm_control_stream_format, &cdm_control_stream_format); + return (cdm_control_stream_format >= 2 && cdm_control_stream_format <= 4); + } + + case PVR_FEATURE_REQUIRES_FB_CDC_ZLS_SETUP: + if (PVR_HAS_FEATURE(pvr_dev, fbcdc_algorithm)) { + u8 fbcdc_algorithm = 0; + + PVR_FEATURE_VALUE(pvr_dev, fbcdc_algorithm, &fbcdc_algorithm); + return (fbcdc_algorithm < 3 || PVR_HAS_FEATURE(pvr_dev, fb_cdc_v4)); + } + return false; + + default: + WARN(true, "Looking up undefined feature %u\n", feature); + return false; + } +} |