1 files changed, 317 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/os/linux/platform_gk20a.h b/drivers/gpu/nvgpu/os/linux/platform_gk20a.h
new file mode 100644
index 00000000..9a99b7fe
--- /dev/null
+++ b/drivers/gpu/nvgpu/os/linux/platform_gk20a.h
@@ -0,0 +1,317 @@
+/*
+ * GK20A Platform (SoC) Interface
+ *
+ * Copyright (c) 2014-2018, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef _GK20A_PLATFORM_H_
+#define _GK20A_PLATFORM_H_
+
+#include <linux/device.h>
+
+#include <nvgpu/lock.h>
+
+#include "gk20a/gk20a.h"
+
+#define GK20A_CLKS_MAX          4
+
+struct gk20a;
+struct channel_gk20a;
+struct gr_ctx_buffer_desc;
+struct gk20a_scale_profile;
+
+struct secure_page_buffer {
+        void (*destroy)(struct gk20a *, struct secure_page_buffer *);
+        size_t size;
+        dma_addr_t phys;
+        size_t used;
+};
+
+struct gk20a_platform {
+        /* Populated by the gk20a driver before probing the platform. */
+        struct gk20a *g;
+
+        /* Should be populated at probe. */
+        bool can_railgate_init;
+
+        /* Should be populated at probe. */
+        bool can_elpg_init;
+
+        /* Should be populated at probe. */
+        bool has_syncpoints;
+
+        /* channel limit after which to start aggressive sync destroy */
+        unsigned int aggressive_sync_destroy_thresh;
+
+        /* flag to set sync destroy aggressiveness */
+        bool aggressive_sync_destroy;
+
+        /* set if ASPM should be disabled on boot; only makes sense for PCI */
+        bool disable_aspm;
+
+        /* Set if the platform can unify the small/large address spaces. */
+        bool unify_address_spaces;
+
+        /* Clock configuration is stored here. Platform probe is responsible
+         * for filling this data. */
+        struct clk *clk[GK20A_CLKS_MAX];
+        int num_clks;
+        int maxmin_clk_id;
+
+#ifdef CONFIG_RESET_CONTROLLER
+        /* Reset control for device */
+        struct reset_control *reset_control;
+#endif
+
+        /* Delay before rail gated */
+        int railgate_delay_init;
+
+        /* init value for slowdown factor */
+        u8 ldiv_slowdown_factor_init;
+
+        /* Second Level Clock Gating: true = enable false = disable */
+        bool enable_slcg;
+
+        /* Block Level Clock Gating: true = enable flase = disable */
+        bool enable_blcg;
+
+        /* Engine Level Clock Gating: true = enable flase = disable */
+        bool enable_elcg;
+
+        /* Should be populated at probe. */
+        bool can_slcg;
+
+        /* Should be populated at probe. */
+        bool can_blcg;
+
+        /* Should be populated at probe. */
+        bool can_elcg;
+
+        /* Engine Level Power Gating: true = enable flase = disable */
+        bool enable_elpg;
+
+        /* Adaptative ELPG: true = enable flase = disable */
+        bool enable_aelpg;
+
+        /* PMU Perfmon: true = enable false = disable */
+        bool enable_perfmon;
+
+        /* Memory System Clock Gating: true = enable flase = disable*/
+        bool enable_mscg;
+
+        /* Timeout for per-channel watchdog (in mS) */
+        u32 ch_wdt_timeout_ms;
+
+        /* Disable big page support */
+        bool disable_bigpage;
+
+        /*
+         * gk20a_do_idle() API can take GPU either into rail gate or CAR reset
+         * This flag can be used to force CAR reset case instead of rail gate
+         */
+        bool force_reset_in_do_idle;
+
+        /* guest/vm id, needed for IPA to PA transation */
+        int vmid;
+
+        /* Initialize the platform interface of the gk20a driver.
+         *
+         * The platform implementation of this function must
+         *   - set the power and clocks of the gk20a device to a known
+         *     state, and
+         *   - populate the gk20a_platform structure (a pointer to the
+         *     structure can be obtained by calling gk20a_get_platform).
+         *
+         * After this function is finished, the driver will initialise
+         * pm runtime and genpd based on the platform configuration.
+         */
+        int (*probe)(struct device *dev);
+
+        /* Second stage initialisation - called once all power management
+         * initialisations are done.
+         */
+        int (*late_probe)(struct device *dev);
+
+        /* Remove device after power management has been done
+         */
+        int (*remove)(struct device *dev);
+
+        /* Poweron platform dependencies */
+        int (*busy)(struct device *dev);
+
+        /* Powerdown platform dependencies */
+        void (*idle)(struct device *dev);
+
+        /* Preallocated VPR buffer for kernel */
+        size_t secure_buffer_size;
+        struct secure_page_buffer secure_buffer;
+
+        /* Device is going to be suspended */
+        int (*suspend)(struct device *);
+
+        /* Called to turn off the device */
+        int (*railgate)(struct device *dev);
+
+        /* Called to turn on the device */
+        int (*unrailgate)(struct device *dev);
+        struct nvgpu_mutex railgate_lock;
+
+        /* Called to check state of device */
+        bool (*is_railgated)(struct device *dev);
+
+        /* get supported frequency list */
+        int (*get_clk_freqs)(struct device *pdev,
+                                unsigned long **freqs, int *num_freqs);
+
+        /* clk related supported functions */
+        long (*clk_round_rate)(struct device *dev,
+                                unsigned long rate);
+
+        /* Called to register GPCPLL with common clk framework */
+        int (*clk_register)(struct gk20a *g);
+
+        /* platform specific scale init quirks */
+        void (*initscale)(struct device *dev);
+
+        /* Postscale callback is called after frequency change */
+        void (*postscale)(struct device *dev,
+                          unsigned long freq);
+
+        /* Pre callback is called before frequency change */
+        void (*prescale)(struct device *dev);
+
+        /* Devfreq governor name. If scaling is enabled, we request
+         * this governor to be used in scaling */
+        const char *devfreq_governor;
+
+        /* Quality of service notifier callback. If this is set, the scaling
+         * routines will register a callback to Qos. Each time we receive
+         * a new value, this callback gets called.  */
+        int (*qos_notify)(struct notifier_block *nb,
+                          unsigned long n, void *p);
+
+        /* Called as part of debug dump. If the gpu gets hung, this function
+         * is responsible for delivering all necessary debug data of other
+         * hw units which may interact with the gpu without direct supervision
+         * of the CPU.
+         */
+        void (*dump_platform_dependencies)(struct device *dev);
+
+        /* Defined when SMMU stage-2 is enabled, and we need to use physical
+         * addresses (not IPA). This is the case for GV100 nvlink in HV+L
+         * configuration, when dGPU is in pass-through mode.
+         */
+        u64 (*phys_addr)(struct gk20a *g, u64 ipa);
+
+        /* Callbacks to assert/deassert GPU reset */
+        int (*reset_assert)(struct device *dev);
+        int (*reset_deassert)(struct device *dev);
+        struct clk *clk_reset;
+        struct dvfs_rail *gpu_rail;
+
+        bool virtual_dev;
+#ifdef CONFIG_TEGRA_GR_VIRTUALIZATION
+        void *vgpu_priv;
+#endif
+        /* source frequency for ptimer in hz */
+        u32 ptimer_src_freq;
+
+#ifdef CONFIG_NVGPU_SUPPORT_CDE
+        bool has_cde;
+#endif
+
+        /* soc name for finding firmware files */
+        const char *soc_name;
+
+        /* false if vidmem aperture actually points to sysmem */
+        bool honors_aperture;
+        /* unified or split memory with separate vidmem? */
+        bool unified_memory;
+
+        /*
+         * DMA mask for Linux (both coh and non-coh). If not set defaults to
+         * 0x3ffffffff (i.e a 34 bit mask).
+         */
+        u64 dma_mask;
+
+        /* minimum supported VBIOS version */
+        u32 vbios_min_version;
+
+        /* true if we run preos microcode on this board */
+        bool run_preos;
+
+        /* true if we need to program sw threshold for
+         * power limits
+         */
+        bool hardcode_sw_threshold;
+
+        /* i2c device index, port and address for INA3221 */
+        u32 ina3221_dcb_index;
+        u32 ina3221_i2c_address;
+        u32 ina3221_i2c_port;
+
+        /* stream id to use */
+        u32 ltc_streamid;
+
+        /* scaling rate */
+        unsigned long cached_rate;
+};
+
+static inline struct gk20a_platform *gk20a_get_platform(
+                struct device *dev)
+{
+        return (struct gk20a_platform *)dev_get_drvdata(dev);
+}
+
+#ifdef CONFIG_TEGRA_GK20A
+extern struct gk20a_platform gm20b_tegra_platform;
+extern struct gk20a_platform gp10b_tegra_platform;
+extern struct gk20a_platform gv11b_tegra_platform;
+#ifdef CONFIG_TEGRA_GR_VIRTUALIZATION
+extern struct gk20a_platform vgpu_tegra_platform;
+extern struct gk20a_platform gv11b_vgpu_tegra_platform;
+#endif
+#endif
+
+int gk20a_tegra_busy(struct device *dev);
+void gk20a_tegra_idle(struct device *dev);
+void gk20a_tegra_debug_dump(struct device *pdev);
+
+static inline struct gk20a *get_gk20a(struct device *dev)
+{
+        return gk20a_get_platform(dev)->g;
+}
+static inline struct gk20a *gk20a_from_dev(struct device *dev)
+{
+        if (!dev)
+                return NULL;
+
+        return ((struct gk20a_platform *)dev_get_drvdata(dev))->g;
+}
+static inline bool gk20a_gpu_is_virtual(struct device *dev)
+{
+        struct gk20a_platform *platform = dev_get_drvdata(dev);
+
+        return platform->virtual_dev;
+}
+
+static inline int support_gk20a_pmu(struct device *dev)
+{
+        if (IS_ENABLED(CONFIG_GK20A_PMU)) {
+                /* gPMU is not supported for vgpu */
+                return !gk20a_gpu_is_virtual(dev);
+        }
+
+        return 0;
+}
+
+#endif