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path: root/drivers/gpu/drm/panfrost/panfrost_gpu.c
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Diffstat (limited to 'drivers/gpu/drm/panfrost/panfrost_gpu.c')
-rw-r--r--drivers/gpu/drm/panfrost/panfrost_gpu.c367
1 files changed, 367 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c
new file mode 100644
index 000000000000..58ef25573cda
--- /dev/null
+++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c
@@ -0,0 +1,367 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
+/* Copyright 2019 Linaro, Ltd., Rob Herring <robh@kernel.org> */
+/* Copyright 2019 Collabora ltd. */
+#include <linux/bitfield.h>
+#include <linux/bitmap.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/platform_device.h>
+
+#include "panfrost_device.h"
+#include "panfrost_features.h"
+#include "panfrost_issues.h"
+#include "panfrost_gpu.h"
+#include "panfrost_regs.h"
+
+#define gpu_write(dev, reg, data) writel(data, dev->iomem + reg)
+#define gpu_read(dev, reg) readl(dev->iomem + reg)
+
+static irqreturn_t panfrost_gpu_irq_handler(int irq, void *data)
+{
+ struct panfrost_device *pfdev = data;
+ u32 state = gpu_read(pfdev, GPU_INT_STAT);
+ u32 fault_status = gpu_read(pfdev, GPU_FAULT_STATUS);
+
+ if (!state)
+ return IRQ_NONE;
+
+ if (state & GPU_IRQ_MASK_ERROR) {
+ u64 address = (u64) gpu_read(pfdev, GPU_FAULT_ADDRESS_HI) << 32;
+ address |= gpu_read(pfdev, GPU_FAULT_ADDRESS_LO);
+
+ dev_warn(pfdev->dev, "GPU Fault 0x%08x (%s) at 0x%016llx\n",
+ fault_status & 0xFF, panfrost_exception_name(pfdev, fault_status),
+ address);
+
+ if (state & GPU_IRQ_MULTIPLE_FAULT)
+ dev_warn(pfdev->dev, "There were multiple GPU faults - some have not been reported\n");
+
+ gpu_write(pfdev, GPU_INT_MASK, 0);
+ }
+
+ gpu_write(pfdev, GPU_INT_CLEAR, state);
+
+ return IRQ_HANDLED;
+}
+
+int panfrost_gpu_soft_reset(struct panfrost_device *pfdev)
+{
+ int ret;
+ u32 val;
+
+ gpu_write(pfdev, GPU_INT_MASK, 0);
+ gpu_write(pfdev, GPU_INT_CLEAR, GPU_IRQ_RESET_COMPLETED);
+ gpu_write(pfdev, GPU_CMD, GPU_CMD_SOFT_RESET);
+
+ ret = readl_relaxed_poll_timeout(pfdev->iomem + GPU_INT_RAWSTAT,
+ val, val & GPU_IRQ_RESET_COMPLETED, 100, 10000);
+
+ if (ret) {
+ dev_err(pfdev->dev, "gpu soft reset timed out\n");
+ return ret;
+ }
+
+ gpu_write(pfdev, GPU_INT_CLEAR, GPU_IRQ_MASK_ALL);
+ gpu_write(pfdev, GPU_INT_MASK, GPU_IRQ_MASK_ALL);
+
+ return 0;
+}
+
+static void panfrost_gpu_init_quirks(struct panfrost_device *pfdev)
+{
+ u32 quirks = 0;
+
+ if (panfrost_has_hw_issue(pfdev, HW_ISSUE_8443) ||
+ panfrost_has_hw_issue(pfdev, HW_ISSUE_11035))
+ quirks |= SC_LS_PAUSEBUFFER_DISABLE;
+
+ if (panfrost_has_hw_issue(pfdev, HW_ISSUE_10327))
+ quirks |= SC_SDC_DISABLE_OQ_DISCARD;
+
+ if (panfrost_has_hw_issue(pfdev, HW_ISSUE_10797))
+ quirks |= SC_ENABLE_TEXGRD_FLAGS;
+
+ if (!panfrost_has_hw_issue(pfdev, GPUCORE_1619)) {
+ if (panfrost_model_cmp(pfdev, 0x750) < 0) /* T60x, T62x, T72x */
+ quirks |= SC_LS_ATTR_CHECK_DISABLE;
+ else if (panfrost_model_cmp(pfdev, 0x880) <= 0) /* T76x, T8xx */
+ quirks |= SC_LS_ALLOW_ATTR_TYPES;
+ }
+
+ if (panfrost_has_hw_feature(pfdev, HW_FEATURE_TLS_HASHING))
+ quirks |= SC_TLS_HASH_ENABLE;
+
+ if (quirks)
+ gpu_write(pfdev, GPU_SHADER_CONFIG, quirks);
+
+
+ quirks = gpu_read(pfdev, GPU_TILER_CONFIG);
+
+ /* Set tiler clock gate override if required */
+ if (panfrost_has_hw_issue(pfdev, HW_ISSUE_T76X_3953))
+ quirks |= TC_CLOCK_GATE_OVERRIDE;
+
+ gpu_write(pfdev, GPU_TILER_CONFIG, quirks);
+
+
+ quirks = gpu_read(pfdev, GPU_L2_MMU_CONFIG);
+
+ /* Limit read & write ID width for AXI */
+ if (panfrost_has_hw_feature(pfdev, HW_FEATURE_3BIT_EXT_RW_L2_MMU_CONFIG))
+ quirks &= ~(L2_MMU_CONFIG_3BIT_LIMIT_EXTERNAL_READS |
+ L2_MMU_CONFIG_3BIT_LIMIT_EXTERNAL_WRITES);
+ else
+ quirks &= ~(L2_MMU_CONFIG_LIMIT_EXTERNAL_READS |
+ L2_MMU_CONFIG_LIMIT_EXTERNAL_WRITES);
+
+ gpu_write(pfdev, GPU_L2_MMU_CONFIG, quirks);
+
+ quirks = 0;
+ if ((panfrost_model_eq(pfdev, 0x860) || panfrost_model_eq(pfdev, 0x880)) &&
+ pfdev->features.revision >= 0x2000)
+ quirks |= JM_MAX_JOB_THROTTLE_LIMIT << JM_JOB_THROTTLE_LIMIT_SHIFT;
+ else if (panfrost_model_eq(pfdev, 0x6000) &&
+ pfdev->features.coherency_features == COHERENCY_ACE)
+ quirks |= (COHERENCY_ACE_LITE | COHERENCY_ACE) <<
+ JM_FORCE_COHERENCY_FEATURES_SHIFT;
+
+ if (quirks)
+ gpu_write(pfdev, GPU_JM_CONFIG, quirks);
+}
+
+#define MAX_HW_REVS 6
+
+struct panfrost_model {
+ const char *name;
+ u32 id;
+ u32 id_mask;
+ u64 features;
+ u64 issues;
+ struct {
+ u32 revision;
+ u64 issues;
+ } revs[MAX_HW_REVS];
+};
+
+#define GPU_MODEL(_name, _id, ...) \
+{\
+ .name = __stringify(_name), \
+ .id = _id, \
+ .features = hw_features_##_name, \
+ .issues = hw_issues_##_name, \
+ .revs = { __VA_ARGS__ }, \
+}
+
+#define GPU_REV_EXT(name, _rev, _p, _s, stat) \
+{\
+ .revision = (_rev) << 12 | (_p) << 4 | (_s), \
+ .issues = hw_issues_##name##_r##_rev##p##_p##stat, \
+}
+#define GPU_REV(name, r, p) GPU_REV_EXT(name, r, p, 0, )
+
+static const struct panfrost_model gpu_models[] = {
+ /* T60x has an oddball version */
+ GPU_MODEL(t600, 0x600,
+ GPU_REV_EXT(t600, 0, 0, 1, _15dev0)),
+ GPU_MODEL(t620, 0x620,
+ GPU_REV(t620, 0, 1), GPU_REV(t620, 1, 0)),
+ GPU_MODEL(t720, 0x720),
+ GPU_MODEL(t760, 0x750,
+ GPU_REV(t760, 0, 0), GPU_REV(t760, 0, 1),
+ GPU_REV_EXT(t760, 0, 1, 0, _50rel0),
+ GPU_REV(t760, 0, 2), GPU_REV(t760, 0, 3)),
+ GPU_MODEL(t820, 0x820),
+ GPU_MODEL(t830, 0x830),
+ GPU_MODEL(t860, 0x860),
+ GPU_MODEL(t880, 0x880),
+
+ GPU_MODEL(g71, 0x6000,
+ GPU_REV_EXT(g71, 0, 0, 1, _05dev0)),
+ GPU_MODEL(g72, 0x6001),
+ GPU_MODEL(g51, 0x7000),
+ GPU_MODEL(g76, 0x7001),
+ GPU_MODEL(g52, 0x7002),
+ GPU_MODEL(g31, 0x7003,
+ GPU_REV(g31, 1, 0)),
+};
+
+static void panfrost_gpu_init_features(struct panfrost_device *pfdev)
+{
+ u32 gpu_id, num_js, major, minor, status, rev;
+ const char *name = "unknown";
+ u64 hw_feat = 0;
+ u64 hw_issues = hw_issues_all;
+ const struct panfrost_model *model;
+ int i;
+
+ pfdev->features.l2_features = gpu_read(pfdev, GPU_L2_FEATURES);
+ pfdev->features.core_features = gpu_read(pfdev, GPU_CORE_FEATURES);
+ pfdev->features.tiler_features = gpu_read(pfdev, GPU_TILER_FEATURES);
+ pfdev->features.mem_features = gpu_read(pfdev, GPU_MEM_FEATURES);
+ pfdev->features.mmu_features = gpu_read(pfdev, GPU_MMU_FEATURES);
+ pfdev->features.thread_features = gpu_read(pfdev, GPU_THREAD_FEATURES);
+ pfdev->features.coherency_features = gpu_read(pfdev, GPU_COHERENCY_FEATURES);
+ for (i = 0; i < 4; i++)
+ pfdev->features.texture_features[i] = gpu_read(pfdev, GPU_TEXTURE_FEATURES(i));
+
+ pfdev->features.as_present = gpu_read(pfdev, GPU_AS_PRESENT);
+
+ pfdev->features.js_present = gpu_read(pfdev, GPU_JS_PRESENT);
+ num_js = hweight32(pfdev->features.js_present);
+ for (i = 0; i < num_js; i++)
+ pfdev->features.js_features[i] = gpu_read(pfdev, GPU_JS_FEATURES(i));
+
+ pfdev->features.shader_present = gpu_read(pfdev, GPU_SHADER_PRESENT_LO);
+ pfdev->features.shader_present |= (u64)gpu_read(pfdev, GPU_SHADER_PRESENT_HI) << 32;
+
+ pfdev->features.tiler_present = gpu_read(pfdev, GPU_TILER_PRESENT_LO);
+ pfdev->features.tiler_present |= (u64)gpu_read(pfdev, GPU_TILER_PRESENT_HI) << 32;
+
+ pfdev->features.l2_present = gpu_read(pfdev, GPU_L2_PRESENT_LO);
+ pfdev->features.l2_present |= (u64)gpu_read(pfdev, GPU_L2_PRESENT_HI) << 32;
+ pfdev->features.nr_core_groups = hweight64(pfdev->features.l2_present);
+
+ pfdev->features.stack_present = gpu_read(pfdev, GPU_STACK_PRESENT_LO);
+ pfdev->features.stack_present |= (u64)gpu_read(pfdev, GPU_STACK_PRESENT_HI) << 32;
+
+ gpu_id = gpu_read(pfdev, GPU_ID);
+ pfdev->features.revision = gpu_id & 0xffff;
+ pfdev->features.id = gpu_id >> 16;
+
+ /* The T60x has an oddball ID value. Fix it up to the standard Midgard
+ * format so we (and userspace) don't have to special case it.
+ */
+ if (pfdev->features.id == 0x6956)
+ pfdev->features.id = 0x0600;
+
+ major = (pfdev->features.revision >> 12) & 0xf;
+ minor = (pfdev->features.revision >> 4) & 0xff;
+ status = pfdev->features.revision & 0xf;
+ rev = pfdev->features.revision;
+
+ gpu_id = pfdev->features.id;
+
+ for (model = gpu_models; model->name; model++) {
+ int best = -1;
+
+ if (!panfrost_model_eq(pfdev, model->id))
+ continue;
+
+ name = model->name;
+ hw_feat = model->features;
+ hw_issues |= model->issues;
+ for (i = 0; i < MAX_HW_REVS; i++) {
+ if (model->revs[i].revision == rev) {
+ best = i;
+ break;
+ } else if (model->revs[i].revision == (rev & ~0xf))
+ best = i;
+ }
+
+ if (best >= 0)
+ hw_issues |= model->revs[best].issues;
+
+ break;
+ }
+
+ bitmap_from_u64(pfdev->features.hw_features, hw_feat);
+ bitmap_from_u64(pfdev->features.hw_issues, hw_issues);
+
+ dev_info(pfdev->dev, "mali-%s id 0x%x major 0x%x minor 0x%x status 0x%x",
+ name, gpu_id, major, minor, status);
+ dev_info(pfdev->dev, "features: %64pb, issues: %64pb",
+ pfdev->features.hw_features,
+ pfdev->features.hw_issues);
+
+ dev_info(pfdev->dev, "Features: L2:0x%08x Shader:0x%08x Tiler:0x%08x Mem:0x%0x MMU:0x%08x AS:0x%x JS:0x%x",
+ pfdev->features.l2_features,
+ pfdev->features.core_features,
+ pfdev->features.tiler_features,
+ pfdev->features.mem_features,
+ pfdev->features.mmu_features,
+ pfdev->features.as_present,
+ pfdev->features.js_present);
+
+ dev_info(pfdev->dev, "shader_present=0x%0llx l2_present=0x%0llx",
+ pfdev->features.shader_present, pfdev->features.l2_present);
+}
+
+void panfrost_gpu_power_on(struct panfrost_device *pfdev)
+{
+ int ret;
+ u32 val;
+
+ /* Just turn on everything for now */
+ gpu_write(pfdev, L2_PWRON_LO, pfdev->features.l2_present);
+ ret = readl_relaxed_poll_timeout(pfdev->iomem + L2_READY_LO,
+ val, val == pfdev->features.l2_present, 100, 1000);
+
+ gpu_write(pfdev, STACK_PWRON_LO, pfdev->features.stack_present);
+ ret |= readl_relaxed_poll_timeout(pfdev->iomem + STACK_READY_LO,
+ val, val == pfdev->features.stack_present, 100, 1000);
+
+ gpu_write(pfdev, SHADER_PWRON_LO, pfdev->features.shader_present);
+ ret |= readl_relaxed_poll_timeout(pfdev->iomem + SHADER_READY_LO,
+ val, val == pfdev->features.shader_present, 100, 1000);
+
+ gpu_write(pfdev, TILER_PWRON_LO, pfdev->features.tiler_present);
+ ret |= readl_relaxed_poll_timeout(pfdev->iomem + TILER_READY_LO,
+ val, val == pfdev->features.tiler_present, 100, 1000);
+
+ if (ret)
+ dev_err(pfdev->dev, "error powering up gpu");
+}
+
+void panfrost_gpu_power_off(struct panfrost_device *pfdev)
+{
+ gpu_write(pfdev, TILER_PWROFF_LO, 0);
+ gpu_write(pfdev, SHADER_PWROFF_LO, 0);
+ gpu_write(pfdev, STACK_PWROFF_LO, 0);
+ gpu_write(pfdev, L2_PWROFF_LO, 0);
+}
+
+int panfrost_gpu_init(struct panfrost_device *pfdev)
+{
+ int err, irq;
+
+ err = panfrost_gpu_soft_reset(pfdev);
+ if (err)
+ return err;
+
+ panfrost_gpu_init_features(pfdev);
+
+ dma_set_mask_and_coherent(pfdev->dev,
+ DMA_BIT_MASK(FIELD_GET(0xff00, pfdev->features.mmu_features)));
+
+ irq = platform_get_irq_byname(to_platform_device(pfdev->dev), "gpu");
+ if (irq <= 0)
+ return -ENODEV;
+
+ err = devm_request_irq(pfdev->dev, irq, panfrost_gpu_irq_handler,
+ IRQF_SHARED, "gpu", pfdev);
+ if (err) {
+ dev_err(pfdev->dev, "failed to request gpu irq");
+ return err;
+ }
+
+ panfrost_gpu_init_quirks(pfdev);
+ panfrost_gpu_power_on(pfdev);
+
+ return 0;
+}
+
+void panfrost_gpu_fini(struct panfrost_device *pfdev)
+{
+ panfrost_gpu_power_off(pfdev);
+}
+
+u32 panfrost_gpu_get_latest_flush_id(struct panfrost_device *pfdev)
+{
+ if (panfrost_has_hw_feature(pfdev, HW_FEATURE_FLUSH_REDUCTION))
+ return gpu_read(pfdev, GPU_LATEST_FLUSH_ID);
+ return 0;
+}