From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c | 657 ++++++++++++++++++++++++ 1 file changed, 657 insertions(+) create mode 100644 drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c') diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c new file mode 100644 index 000000000..d573fb091 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/clk/gk20a.c @@ -0,0 +1,657 @@ +/* + * Copyright (c) 2014-2016, NVIDIA CORPORATION. All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Shamelessly ripped off from ChromeOS's gk20a/clk_pllg.c + * + */ +#include "priv.h" +#include "gk20a.h" + +#include +#include + +static const u8 _pl_to_div[] = { +/* PL: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 */ +/* p: */ 1, 2, 3, 4, 5, 6, 8, 10, 12, 16, 12, 16, 20, 24, 32, +}; + +static u32 pl_to_div(u32 pl) +{ + if (pl >= ARRAY_SIZE(_pl_to_div)) + return 1; + + return _pl_to_div[pl]; +} + +static u32 div_to_pl(u32 div) +{ + u32 pl; + + for (pl = 0; pl < ARRAY_SIZE(_pl_to_div) - 1; pl++) { + if (_pl_to_div[pl] >= div) + return pl; + } + + return ARRAY_SIZE(_pl_to_div) - 1; +} + +static const struct gk20a_clk_pllg_params gk20a_pllg_params = { + .min_vco = 1000000, .max_vco = 2064000, + .min_u = 12000, .max_u = 38000, + .min_m = 1, .max_m = 255, + .min_n = 8, .max_n = 255, + .min_pl = 1, .max_pl = 32, +}; + +void +gk20a_pllg_read_mnp(struct gk20a_clk *clk, struct gk20a_pll *pll) +{ + struct nvkm_device *device = clk->base.subdev.device; + u32 val; + + val = nvkm_rd32(device, GPCPLL_COEFF); + pll->m = (val >> GPCPLL_COEFF_M_SHIFT) & MASK(GPCPLL_COEFF_M_WIDTH); + pll->n = (val >> GPCPLL_COEFF_N_SHIFT) & MASK(GPCPLL_COEFF_N_WIDTH); + pll->pl = (val >> GPCPLL_COEFF_P_SHIFT) & MASK(GPCPLL_COEFF_P_WIDTH); +} + +void +gk20a_pllg_write_mnp(struct gk20a_clk *clk, const struct gk20a_pll *pll) +{ + struct nvkm_device *device = clk->base.subdev.device; + u32 val; + + val = (pll->m & MASK(GPCPLL_COEFF_M_WIDTH)) << GPCPLL_COEFF_M_SHIFT; + val |= (pll->n & MASK(GPCPLL_COEFF_N_WIDTH)) << GPCPLL_COEFF_N_SHIFT; + val |= (pll->pl & MASK(GPCPLL_COEFF_P_WIDTH)) << GPCPLL_COEFF_P_SHIFT; + nvkm_wr32(device, GPCPLL_COEFF, val); +} + +u32 +gk20a_pllg_calc_rate(struct gk20a_clk *clk, struct gk20a_pll *pll) +{ + u32 rate; + u32 divider; + + rate = clk->parent_rate * pll->n; + divider = pll->m * clk->pl_to_div(pll->pl); + + return rate / divider / 2; +} + +int +gk20a_pllg_calc_mnp(struct gk20a_clk *clk, unsigned long rate, + struct gk20a_pll *pll) +{ + struct nvkm_subdev *subdev = &clk->base.subdev; + u32 target_clk_f, ref_clk_f, target_freq; + u32 min_vco_f, max_vco_f; + u32 low_pl, high_pl, best_pl; + u32 target_vco_f; + u32 best_m, best_n; + u32 best_delta = ~0; + u32 pl; + + target_clk_f = rate * 2 / KHZ; + ref_clk_f = clk->parent_rate / KHZ; + + target_vco_f = target_clk_f + target_clk_f / 50; + max_vco_f = max(clk->params->max_vco, target_vco_f); + min_vco_f = clk->params->min_vco; + best_m = clk->params->max_m; + best_n = clk->params->min_n; + best_pl = clk->params->min_pl; + + /* min_pl <= high_pl <= max_pl */ + high_pl = (max_vco_f + target_vco_f - 1) / target_vco_f; + high_pl = min(high_pl, clk->params->max_pl); + high_pl = max(high_pl, clk->params->min_pl); + high_pl = clk->div_to_pl(high_pl); + + /* min_pl <= low_pl <= max_pl */ + low_pl = min_vco_f / target_vco_f; + low_pl = min(low_pl, clk->params->max_pl); + low_pl = max(low_pl, clk->params->min_pl); + low_pl = clk->div_to_pl(low_pl); + + nvkm_debug(subdev, "low_PL %d(div%d), high_PL %d(div%d)", low_pl, + clk->pl_to_div(low_pl), high_pl, clk->pl_to_div(high_pl)); + + /* Select lowest possible VCO */ + for (pl = low_pl; pl <= high_pl; pl++) { + u32 m, n, n2; + + target_vco_f = target_clk_f * clk->pl_to_div(pl); + + for (m = clk->params->min_m; m <= clk->params->max_m; m++) { + u32 u_f = ref_clk_f / m; + + if (u_f < clk->params->min_u) + break; + if (u_f > clk->params->max_u) + continue; + + n = (target_vco_f * m) / ref_clk_f; + n2 = ((target_vco_f * m) + (ref_clk_f - 1)) / ref_clk_f; + + if (n > clk->params->max_n) + break; + + for (; n <= n2; n++) { + u32 vco_f; + + if (n < clk->params->min_n) + continue; + if (n > clk->params->max_n) + break; + + vco_f = ref_clk_f * n / m; + + if (vco_f >= min_vco_f && vco_f <= max_vco_f) { + u32 delta, lwv; + + lwv = (vco_f + (clk->pl_to_div(pl) / 2)) + / clk->pl_to_div(pl); + delta = abs(lwv - target_clk_f); + + if (delta < best_delta) { + best_delta = delta; + best_m = m; + best_n = n; + best_pl = pl; + + if (best_delta == 0) + goto found_match; + } + } + } + } + } + +found_match: + WARN_ON(best_delta == ~0); + + if (best_delta != 0) + nvkm_debug(subdev, + "no best match for target @ %dMHz on gpc_pll", + target_clk_f / KHZ); + + pll->m = best_m; + pll->n = best_n; + pll->pl = best_pl; + + target_freq = gk20a_pllg_calc_rate(clk, pll); + + nvkm_debug(subdev, + "actual target freq %d KHz, M %d, N %d, PL %d(div%d)\n", + target_freq / KHZ, pll->m, pll->n, pll->pl, + clk->pl_to_div(pll->pl)); + return 0; +} + +static int +gk20a_pllg_slide(struct gk20a_clk *clk, u32 n) +{ + struct nvkm_subdev *subdev = &clk->base.subdev; + struct nvkm_device *device = subdev->device; + struct gk20a_pll pll; + int ret = 0; + + /* get old coefficients */ + gk20a_pllg_read_mnp(clk, &pll); + /* do nothing if NDIV is the same */ + if (n == pll.n) + return 0; + + /* pll slowdown mode */ + nvkm_mask(device, GPCPLL_NDIV_SLOWDOWN, + BIT(GPCPLL_NDIV_SLOWDOWN_SLOWDOWN_USING_PLL_SHIFT), + BIT(GPCPLL_NDIV_SLOWDOWN_SLOWDOWN_USING_PLL_SHIFT)); + + /* new ndiv ready for ramp */ + pll.n = n; + udelay(1); + gk20a_pllg_write_mnp(clk, &pll); + + /* dynamic ramp to new ndiv */ + udelay(1); + nvkm_mask(device, GPCPLL_NDIV_SLOWDOWN, + BIT(GPCPLL_NDIV_SLOWDOWN_EN_DYNRAMP_SHIFT), + BIT(GPCPLL_NDIV_SLOWDOWN_EN_DYNRAMP_SHIFT)); + + /* wait for ramping to complete */ + if (nvkm_wait_usec(device, 500, GPC_BCAST_NDIV_SLOWDOWN_DEBUG, + GPC_BCAST_NDIV_SLOWDOWN_DEBUG_PLL_DYNRAMP_DONE_SYNCED_MASK, + GPC_BCAST_NDIV_SLOWDOWN_DEBUG_PLL_DYNRAMP_DONE_SYNCED_MASK) < 0) + ret = -ETIMEDOUT; + + /* exit slowdown mode */ + nvkm_mask(device, GPCPLL_NDIV_SLOWDOWN, + BIT(GPCPLL_NDIV_SLOWDOWN_SLOWDOWN_USING_PLL_SHIFT) | + BIT(GPCPLL_NDIV_SLOWDOWN_EN_DYNRAMP_SHIFT), 0); + nvkm_rd32(device, GPCPLL_NDIV_SLOWDOWN); + + return ret; +} + +static int +gk20a_pllg_enable(struct gk20a_clk *clk) +{ + struct nvkm_device *device = clk->base.subdev.device; + u32 val; + + nvkm_mask(device, GPCPLL_CFG, GPCPLL_CFG_ENABLE, GPCPLL_CFG_ENABLE); + nvkm_rd32(device, GPCPLL_CFG); + + /* enable lock detection */ + val = nvkm_rd32(device, GPCPLL_CFG); + if (val & GPCPLL_CFG_LOCK_DET_OFF) { + val &= ~GPCPLL_CFG_LOCK_DET_OFF; + nvkm_wr32(device, GPCPLL_CFG, val); + } + + /* wait for lock */ + if (nvkm_wait_usec(device, 300, GPCPLL_CFG, GPCPLL_CFG_LOCK, + GPCPLL_CFG_LOCK) < 0) + return -ETIMEDOUT; + + /* switch to VCO mode */ + nvkm_mask(device, SEL_VCO, BIT(SEL_VCO_GPC2CLK_OUT_SHIFT), + BIT(SEL_VCO_GPC2CLK_OUT_SHIFT)); + + return 0; +} + +static void +gk20a_pllg_disable(struct gk20a_clk *clk) +{ + struct nvkm_device *device = clk->base.subdev.device; + + /* put PLL in bypass before disabling it */ + nvkm_mask(device, SEL_VCO, BIT(SEL_VCO_GPC2CLK_OUT_SHIFT), 0); + + nvkm_mask(device, GPCPLL_CFG, GPCPLL_CFG_ENABLE, 0); + nvkm_rd32(device, GPCPLL_CFG); +} + +static int +gk20a_pllg_program_mnp(struct gk20a_clk *clk, const struct gk20a_pll *pll) +{ + struct nvkm_subdev *subdev = &clk->base.subdev; + struct nvkm_device *device = subdev->device; + struct gk20a_pll cur_pll; + int ret; + + gk20a_pllg_read_mnp(clk, &cur_pll); + + /* split VCO-to-bypass jump in half by setting out divider 1:2 */ + nvkm_mask(device, GPC2CLK_OUT, GPC2CLK_OUT_VCODIV_MASK, + GPC2CLK_OUT_VCODIV2 << GPC2CLK_OUT_VCODIV_SHIFT); + /* Intentional 2nd write to assure linear divider operation */ + nvkm_mask(device, GPC2CLK_OUT, GPC2CLK_OUT_VCODIV_MASK, + GPC2CLK_OUT_VCODIV2 << GPC2CLK_OUT_VCODIV_SHIFT); + nvkm_rd32(device, GPC2CLK_OUT); + udelay(2); + + gk20a_pllg_disable(clk); + + gk20a_pllg_write_mnp(clk, pll); + + ret = gk20a_pllg_enable(clk); + if (ret) + return ret; + + /* restore out divider 1:1 */ + udelay(2); + nvkm_mask(device, GPC2CLK_OUT, GPC2CLK_OUT_VCODIV_MASK, + GPC2CLK_OUT_VCODIV1 << GPC2CLK_OUT_VCODIV_SHIFT); + /* Intentional 2nd write to assure linear divider operation */ + nvkm_mask(device, GPC2CLK_OUT, GPC2CLK_OUT_VCODIV_MASK, + GPC2CLK_OUT_VCODIV1 << GPC2CLK_OUT_VCODIV_SHIFT); + nvkm_rd32(device, GPC2CLK_OUT); + + return 0; +} + +static int +gk20a_pllg_program_mnp_slide(struct gk20a_clk *clk, const struct gk20a_pll *pll) +{ + struct gk20a_pll cur_pll; + int ret; + + if (gk20a_pllg_is_enabled(clk)) { + gk20a_pllg_read_mnp(clk, &cur_pll); + + /* just do NDIV slide if there is no change to M and PL */ + if (pll->m == cur_pll.m && pll->pl == cur_pll.pl) + return gk20a_pllg_slide(clk, pll->n); + + /* slide down to current NDIV_LO */ + cur_pll.n = gk20a_pllg_n_lo(clk, &cur_pll); + ret = gk20a_pllg_slide(clk, cur_pll.n); + if (ret) + return ret; + } + + /* program MNP with the new clock parameters and new NDIV_LO */ + cur_pll = *pll; + cur_pll.n = gk20a_pllg_n_lo(clk, &cur_pll); + ret = gk20a_pllg_program_mnp(clk, &cur_pll); + if (ret) + return ret; + + /* slide up to new NDIV */ + return gk20a_pllg_slide(clk, pll->n); +} + +static struct nvkm_pstate +gk20a_pstates[] = { + { + .base = { + .domain[nv_clk_src_gpc] = 72000, + .voltage = 0, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 108000, + .voltage = 1, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 180000, + .voltage = 2, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 252000, + .voltage = 3, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 324000, + .voltage = 4, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 396000, + .voltage = 5, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 468000, + .voltage = 6, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 540000, + .voltage = 7, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 612000, + .voltage = 8, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 648000, + .voltage = 9, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 684000, + .voltage = 10, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 708000, + .voltage = 11, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 756000, + .voltage = 12, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 804000, + .voltage = 13, + }, + }, + { + .base = { + .domain[nv_clk_src_gpc] = 852000, + .voltage = 14, + }, + }, +}; + +int +gk20a_clk_read(struct nvkm_clk *base, enum nv_clk_src src) +{ + struct gk20a_clk *clk = gk20a_clk(base); + struct nvkm_subdev *subdev = &clk->base.subdev; + struct nvkm_device *device = subdev->device; + struct gk20a_pll pll; + + switch (src) { + case nv_clk_src_crystal: + return device->crystal; + case nv_clk_src_gpc: + gk20a_pllg_read_mnp(clk, &pll); + return gk20a_pllg_calc_rate(clk, &pll) / GK20A_CLK_GPC_MDIV; + default: + nvkm_error(subdev, "invalid clock source %d\n", src); + return -EINVAL; + } +} + +int +gk20a_clk_calc(struct nvkm_clk *base, struct nvkm_cstate *cstate) +{ + struct gk20a_clk *clk = gk20a_clk(base); + + return gk20a_pllg_calc_mnp(clk, cstate->domain[nv_clk_src_gpc] * + GK20A_CLK_GPC_MDIV, &clk->pll); +} + +int +gk20a_clk_prog(struct nvkm_clk *base) +{ + struct gk20a_clk *clk = gk20a_clk(base); + int ret; + + ret = gk20a_pllg_program_mnp_slide(clk, &clk->pll); + if (ret) + ret = gk20a_pllg_program_mnp(clk, &clk->pll); + + return ret; +} + +void +gk20a_clk_tidy(struct nvkm_clk *base) +{ +} + +int +gk20a_clk_setup_slide(struct gk20a_clk *clk) +{ + struct nvkm_subdev *subdev = &clk->base.subdev; + struct nvkm_device *device = subdev->device; + u32 step_a, step_b; + + switch (clk->parent_rate) { + case 12000000: + case 12800000: + case 13000000: + step_a = 0x2b; + step_b = 0x0b; + break; + case 19200000: + step_a = 0x12; + step_b = 0x08; + break; + case 38400000: + step_a = 0x04; + step_b = 0x05; + break; + default: + nvkm_error(subdev, "invalid parent clock rate %u KHz", + clk->parent_rate / KHZ); + return -EINVAL; + } + + nvkm_mask(device, GPCPLL_CFG2, 0xff << GPCPLL_CFG2_PLL_STEPA_SHIFT, + step_a << GPCPLL_CFG2_PLL_STEPA_SHIFT); + nvkm_mask(device, GPCPLL_CFG3, 0xff << GPCPLL_CFG3_PLL_STEPB_SHIFT, + step_b << GPCPLL_CFG3_PLL_STEPB_SHIFT); + + return 0; +} + +void +gk20a_clk_fini(struct nvkm_clk *base) +{ + struct nvkm_device *device = base->subdev.device; + struct gk20a_clk *clk = gk20a_clk(base); + + /* slide to VCO min */ + if (gk20a_pllg_is_enabled(clk)) { + struct gk20a_pll pll; + u32 n_lo; + + gk20a_pllg_read_mnp(clk, &pll); + n_lo = gk20a_pllg_n_lo(clk, &pll); + gk20a_pllg_slide(clk, n_lo); + } + + gk20a_pllg_disable(clk); + + /* set IDDQ */ + nvkm_mask(device, GPCPLL_CFG, GPCPLL_CFG_IDDQ, 1); +} + +static int +gk20a_clk_init(struct nvkm_clk *base) +{ + struct gk20a_clk *clk = gk20a_clk(base); + struct nvkm_subdev *subdev = &clk->base.subdev; + struct nvkm_device *device = subdev->device; + int ret; + + /* get out from IDDQ */ + nvkm_mask(device, GPCPLL_CFG, GPCPLL_CFG_IDDQ, 0); + nvkm_rd32(device, GPCPLL_CFG); + udelay(5); + + nvkm_mask(device, GPC2CLK_OUT, GPC2CLK_OUT_INIT_MASK, + GPC2CLK_OUT_INIT_VAL); + + ret = gk20a_clk_setup_slide(clk); + if (ret) + return ret; + + /* Start with lowest frequency */ + base->func->calc(base, &base->func->pstates[0].base); + ret = base->func->prog(&clk->base); + if (ret) { + nvkm_error(subdev, "cannot initialize clock\n"); + return ret; + } + + return 0; +} + +static const struct nvkm_clk_func +gk20a_clk = { + .init = gk20a_clk_init, + .fini = gk20a_clk_fini, + .read = gk20a_clk_read, + .calc = gk20a_clk_calc, + .prog = gk20a_clk_prog, + .tidy = gk20a_clk_tidy, + .pstates = gk20a_pstates, + .nr_pstates = ARRAY_SIZE(gk20a_pstates), + .domains = { + { nv_clk_src_crystal, 0xff }, + { nv_clk_src_gpc, 0xff, 0, "core", GK20A_CLK_GPC_MDIV }, + { nv_clk_src_max } + } +}; + +int +gk20a_clk_ctor(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, + const struct nvkm_clk_func *func, const struct gk20a_clk_pllg_params *params, + struct gk20a_clk *clk) +{ + struct nvkm_device_tegra *tdev = device->func->tegra(device); + int ret; + int i; + + /* Finish initializing the pstates */ + for (i = 0; i < func->nr_pstates; i++) { + INIT_LIST_HEAD(&func->pstates[i].list); + func->pstates[i].pstate = i + 1; + } + + clk->params = params; + clk->parent_rate = clk_get_rate(tdev->clk); + + ret = nvkm_clk_ctor(func, device, type, inst, true, &clk->base); + if (ret) + return ret; + + nvkm_debug(&clk->base.subdev, "parent clock rate: %d Khz\n", + clk->parent_rate / KHZ); + + return 0; +} + +int +gk20a_clk_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, + struct nvkm_clk **pclk) +{ + struct gk20a_clk *clk; + int ret; + + clk = kzalloc(sizeof(*clk), GFP_KERNEL); + if (!clk) + return -ENOMEM; + *pclk = &clk->base; + + ret = gk20a_clk_ctor(device, type, inst, &gk20a_clk, &gk20a_pllg_params, clk); + + clk->pl_to_div = pl_to_div; + clk->div_to_pl = div_to_pl; + return ret; +} -- cgit v1.2.3