// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2017-2018 The Linux Foundation. All rights reserved. */
#include <linux/clk.h>
#include <linux/iopoll.h>
#include <linux/pm_opp.h>
#include <soc/qcom/cmd-db.h>
#include "a6xx_gpu.h"
#include "a6xx_gmu.xml.h"
static irqreturn_t a6xx_gmu_irq(int irq, void *data)
{
struct a6xx_gmu *gmu = data;
u32 status;
status = gmu_read(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_STATUS);
gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_CLR, status);
if (status & A6XX_GMU_AO_HOST_INTERRUPT_STATUS_WDOG_BITE) {
dev_err_ratelimited(gmu->dev, "GMU watchdog expired\n");
/* Temporary until we can recover safely */
BUG();
}
if (status & A6XX_GMU_AO_HOST_INTERRUPT_STATUS_HOST_AHB_BUS_ERROR)
dev_err_ratelimited(gmu->dev, "GMU AHB bus error\n");
if (status & A6XX_GMU_AO_HOST_INTERRUPT_STATUS_FENCE_ERR)
dev_err_ratelimited(gmu->dev, "GMU fence error: 0x%x\n",
gmu_read(gmu, REG_A6XX_GMU_AHB_FENCE_STATUS));
return IRQ_HANDLED;
}
static irqreturn_t a6xx_hfi_irq(int irq, void *data)
{
struct a6xx_gmu *gmu = data;
u32 status;
status = gmu_read(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO);
gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_CLR, status);
if (status & A6XX_GMU_GMU2HOST_INTR_INFO_MSGQ)
tasklet_schedule(&gmu->hfi_tasklet);
if (status & A6XX_GMU_GMU2HOST_INTR_INFO_CM3_FAULT) {
dev_err_ratelimited(gmu->dev, "GMU firmware fault\n");
/* Temporary until we can recover safely */
BUG();
}
return IRQ_HANDLED;
}
/* Check to see if the GX rail is still powered */
static bool a6xx_gmu_gx_is_on(struct a6xx_gmu *gmu)
{
u32 val = gmu_read(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS);
return !(val &
(A6XX_GMU_SPTPRAC_PWR_CLK_STATUS_GX_HM_GDSC_POWER_OFF |
A6XX_GMU_SPTPRAC_PWR_CLK_STATUS_GX_HM_CLK_OFF));
}
static int a6xx_gmu_set_freq(struct a6xx_gmu *gmu, int index)
{
gmu_write(gmu, REG_A6XX_GMU_DCVS_ACK_OPTION, 0);
gmu_write(gmu, REG_A6XX_GMU_DCVS_PERF_SETTING,
((index << 24) & 0xff) | (3 & 0xf));
/*
* Send an invalid index as a vote for the bus bandwidth and let the
* firmware decide on the right vote
*/
gmu_write(gmu, REG_A6XX_GMU_DCVS_BW_SETTING, 0xff);
/* Set and clear the OOB for DCVS to trigger the GMU */
a6xx_gmu_set_oob(gmu, GMU_OOB_DCVS_SET);
a6xx_gmu_clear_oob(gmu, GMU_OOB_DCVS_SET);
return gmu_read(gmu, REG_A6XX_GMU_DCVS_RETURN);
}
static bool a6xx_gmu_check_idle_level(struct a6xx_gmu *gmu)
{
u32 val;
int local = gmu->idle_level;
/* SPTP and IFPC both report as IFPC */
if (gmu->idle_level == GMU_IDLE_STATE_SPTP)
local = GMU_IDLE_STATE_IFPC;
val = gmu_read(gmu, REG_A6XX_GPU_GMU_CX_GMU_RPMH_POWER_STATE);
if (val == local) {
if (gmu->idle_level != GMU_IDLE_STATE_IFPC ||
!a6xx_gmu_gx_is_on(gmu))
return true;
}
return false;
}
/* Wait for the GMU to get to its most idle state */
int a6xx_gmu_wait_for_idle(struct a6xx_gpu *a6xx_gpu)
{
struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
return spin_until(a6xx_gmu_check_idle_level(gmu));
}
static int a6xx_gmu_start(struct a6xx_gmu *gmu)
{
int ret;
u32 val;
gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 1);
gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 0);
ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_CM3_FW_INIT_RESULT, val,
val == 0xbabeface, 100, 10000);
if (ret)
dev_err(gmu->dev, "GMU firmware initialization timed out\n");
return ret;
}
static int a6xx_gmu_hfi_start(struct a6xx_gmu *gmu)
{
u32 val;
int ret;
gmu_rmw(gmu, REG_A6XX_GMU_GMU2HOST_INTR_MASK,
A6XX_GMU_GMU2HOST_INTR_INFO_MSGQ, 0);
gmu_write(gmu, REG_A6XX_GMU_HFI_CTRL_INIT, 1);
ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_HFI_CTRL_STATUS, val,
val & 1, 100, 10000);
if (ret)
dev_err(gmu->dev, "Unable to start the HFI queues\n");
return ret;
}
/* Trigger a OOB (out of band) request to the GMU */
int a6xx_gmu_set_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state)
{
int ret;
u32 val;
int request, ack;
const char *name;
switch (state) {
case GMU_OOB_GPU_SET:
request = GMU_OOB_GPU_SET_REQUEST;
ack = GMU_OOB_GPU_SET_ACK;
name = "GPU_SET";
break;
case GMU_OOB_BOOT_SLUMBER:
request = GMU_OOB_BOOT_SLUMBER_REQUEST;
ack = GMU_OOB_BOOT_SLUMBER_ACK;
name = "BOOT_SLUMBER";
break;
case GMU_OOB_DCVS_SET:
request = GMU_OOB_DCVS_REQUEST;
ack = GMU_OOB_DCVS_ACK;
name = "GPU_DCVS";
break;
default:
return -EINVAL;
}
/* Trigger the equested OOB operation */
gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET, 1 << request);
/* Wait for the acknowledge interrupt */
ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO, val,
val & (1 << ack), 100, 10000);
if (ret)
dev_err(gmu->dev,
"Timeout waiting for GMU OOB set %s: 0x%x\n",
name,
gmu_read(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO));
/* Clear the acknowledge interrupt */
gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_CLR, 1 << ack);
return ret;
}
/* Clear a pending OOB state in the GMU */
void a6xx_gmu_clear_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state)
{
switch (state) {
case GMU_OOB_GPU_SET:
gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
1 << GMU_OOB_GPU_SET_CLEAR);
break;
case GMU_OOB_BOOT_SLUMBER:
gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
1 << GMU_OOB_BOOT_SLUMBER_CLEAR);
break;
case GMU_OOB_DCVS_SET:
gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET,
1 << GMU_OOB_DCVS_CLEAR);
break;
}
}
/* Enable CPU control of SPTP power power collapse */
static int a6xx_sptprac_enable(struct a6xx_gmu *gmu)
{
int ret;
u32 val;
gmu_write(gmu, REG_A6XX_GMU_GX_SPTPRAC_POWER_CONTROL, 0x778000);
ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS, val,
(val & 0x38) == 0x28, 1, 100);
if (ret) {
dev_err(gmu->dev, "Unable to power on SPTPRAC: 0x%x\n",
gmu_read(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS));
}
return 0;
}
/* Disable CPU control of SPTP power power collapse */
static void a6xx_sptprac_disable(struct a6xx_gmu *gmu)
{
u32 val;
int ret;
/* Make sure retention is on */
gmu_rmw(gmu, REG_A6XX_GPU_CC_GX_GDSCR, 0, (1 << 11));
gmu_write(gmu, REG_A6XX_GMU_GX_SPTPRAC_POWER_CONTROL, 0x778001);
ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS, val,
(val & 0x04), 100, 10000);
if (ret)
dev_err(gmu->dev, "failed to power off SPTPRAC: 0x%x\n",
gmu_read(gmu, REG_A6XX_GMU_SPTPRAC_PWR_CLK_STATUS));
}
/* Let the GMU know we are starting a boot sequence */
static int a6xx_gmu_gfx_rail_on(struct a6xx_gmu *gmu)
{
u32 vote;
/* Let the GMU know we are getting ready for boot */
gmu_write(gmu, REG_A6XX_GMU_BOOT_SLUMBER_OPTION, 0);
/* Choose the "default" power level as the highest available */
vote = gmu->gx_arc_votes[gmu->nr_gpu_freqs - 1];
gmu_write(gmu, REG_A6XX_GMU_GX_VOTE_IDX, vote & 0xff);
gmu_write(gmu, REG_A6XX_GMU_MX_VOTE_IDX, (vote >> 8) & 0xff);
/* Let the GMU know the boot sequence has started */
return a6xx_gmu_set_oob(gmu, GMU_OOB_BOOT_SLUMBER);
}
/* Let the GMU know that we are about to go into slumber */
static int a6xx_gmu_notify_slumber(struct a6xx_gmu *gmu)
{
int ret;
/* Disable the power counter so the GMU isn't busy */
gmu_write(gmu, REG_A6XX_GMU_CX_GMU_POWER_COUNTER_ENABLE, 0);
/* Disable SPTP_PC if the CPU is responsible for it */
if (gmu->idle_level < GMU_IDLE_STATE_SPTP)
a6xx_sptprac_disable(gmu);
/* Tell the GMU to get ready to slumber */
gmu_write(gmu, REG_A6XX_GMU_BOOT_SLUMBER_OPTION, 1);
ret = a6xx_gmu_set_oob(gmu, GMU_OOB_BOOT_SLUMBER);
a6xx_gmu_clear_oob(gmu, GMU_OOB_BOOT_SLUMBER);
if (!ret) {
/* Check to see if the GMU really did slumber */
if (gmu_read(gmu, REG_A6XX_GPU_GMU_CX_GMU_RPMH_POWER_STATE)
!= 0x0f) {
dev_err(gmu->dev, "The GMU did not go into slumber\n");
ret = -ETIMEDOUT;
}
}
/* Put fence into allow mode */
gmu_write(gmu, REG_A6XX_GMU_AO_AHB_FENCE_CTRL, 0);
return ret;
}
static int a6xx_rpmh_start(struct a6xx_gmu *gmu)
{
int ret;
u32 val;
gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 1 << 1);
/* Wait for the register to finish posting */
wmb();
ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_RSCC_CONTROL_ACK, val,
val & (1 << 1), 100, 10000);
if (ret) {
dev_err(gmu->dev, "Unable to power on the GPU RSC\n");
return ret;
}
ret = gmu_poll_timeout(gmu, REG_A6XX_RSCC_SEQ_BUSY_DRV0, val,
!val, 100, 10000);
if (!ret) {
gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 0);
/* Re-enable the power counter */
gmu_write(gmu, REG_A6XX_GMU_CX_GMU_POWER_COUNTER_ENABLE, 1);
return 0;
}
dev_err(gmu->dev, "GPU RSC sequence stuck while waking up the GPU\n");
return ret;
}
static void a6xx_rpmh_stop(struct a6xx_gmu *gmu)
{
int ret;
u32 val;
gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 1);
ret = gmu_poll_timeout(gmu, REG_A6XX_GPU_RSCC_RSC_STATUS0_DRV0,
val, val & (1 << 16), 100, 10000);
if (ret)
dev_err(gmu->dev, "Unable to power off the GPU RSC\n");
gmu_write(gmu, REG_A6XX_GMU_RSCC_CONTROL_REQ, 0);
}
static void a6xx_gmu_rpmh_init(struct a6xx_gmu *gmu)
{
/* Disable SDE clock gating */
gmu_write(gmu, REG_A6XX_GPU_RSCC_RSC_STATUS0_DRV0, BIT(24));
/* Setup RSC PDC handshake for sleep and wakeup */
gmu_write(gmu, REG_A6XX_RSCC_PDC_SLAVE_ID_DRV0, 1);
gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_DATA, 0);
gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_ADDR, 0);
gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_DATA + 2, 0);
gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_ADDR + 2, 0);
gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_DATA + 4, 0x80000000);
gmu_write(gmu, REG_A6XX_RSCC_HIDDEN_TCS_CMD0_ADDR + 4, 0);
gmu_write(gmu, REG_A6XX_RSCC_OVERRIDE_START_ADDR, 0);
gmu_write(gmu, REG_A6XX_RSCC_PDC_SEQ_START_ADDR, 0x4520);
gmu_write(gmu, REG_A6XX_RSCC_PDC_MATCH_VALUE_LO, 0x4510);
gmu_write(gmu, REG_A6XX_RSCC_PDC_MATCH_VALUE_HI, 0x4514);
/* Load RSC sequencer uCode for sleep and wakeup */
gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0, 0xa7a506a0);
gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 1, 0xa1e6a6e7);
gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 2, 0xa2e081e1);
gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 3, 0xe9a982e2);
gmu_write(gmu, REG_A6XX_RSCC_SEQ_MEM_0_DRV0 + 4, 0x0020e8a8);
/* Load PDC sequencer uCode for power up and power down sequence */
pdc_write(gmu, REG_A6XX_PDC_GPU_SEQ_MEM_0, 0xfebea1e1);
pdc_write(gmu, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 1, 0xa5a4a3a2);
pdc_write(gmu, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 2, 0x8382a6e0);
pdc_write(gmu, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 3, 0xbce3e284);
pdc_write(gmu, REG_A6XX_PDC_GPU_SEQ_MEM_0 + 4, 0x002081fc);
/* Set TCS commands used by PDC sequence for low power modes */
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD_ENABLE_BANK, 7);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD_WAIT_FOR_CMPL_BANK, 0);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CONTROL, 0);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_MSGID, 0x10108);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_ADDR, 0x30010);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_DATA, 1);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_MSGID + 4, 0x10108);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_ADDR + 4, 0x30000);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_DATA + 4, 0x0);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_MSGID + 8, 0x10108);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_ADDR + 8, 0x30080);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS1_CMD0_DATA + 8, 0x0);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD_ENABLE_BANK, 7);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD_WAIT_FOR_CMPL_BANK, 0);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CONTROL, 0);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_MSGID, 0x10108);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_ADDR, 0x30010);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_DATA, 2);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_MSGID + 4, 0x10108);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_ADDR + 4, 0x30000);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_DATA + 4, 0x3);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_MSGID + 8, 0x10108);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_ADDR + 8, 0x30080);
pdc_write(gmu, REG_A6XX_PDC_GPU_TCS3_CMD0_DATA + 8, 0x3);
/* Setup GPU PDC */
pdc_write(gmu, REG_A6XX_PDC_GPU_SEQ_START_ADDR, 0);
pdc_write(gmu, REG_A6XX_PDC_GPU_ENABLE_PDC, 0x80000001);
/* ensure no writes happen before the uCode is fully written */
wmb();
}
/*
* The lowest 16 bits of this value are the number of XO clock cycles for main
* hysteresis which is set at 0x1680 cycles (300 us). The higher 16 bits are
* for the shorter hysteresis that happens after main - this is 0xa (.5 us)
*/
#define GMU_PWR_COL_HYST 0x000a1680
/* Set up the idle state for the GMU */
static void a6xx_gmu_power_config(struct a6xx_gmu *gmu)
{
/* Disable GMU WB/RB buffer */
gmu_write(gmu, REG_A6XX_GMU_SYS_BUS_CONFIG, 0x1);
gmu_write(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_CTRL, 0x9c40400);
switch (gmu->idle_level) {
case GMU_IDLE_STATE_IFPC:
gmu_write(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_HYST,
GMU_PWR_COL_HYST);
gmu_rmw(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_CTRL, 0,
A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_IFPC_ENABLE |
A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_HM_POWER_COLLAPSE_ENABLE);
/* Fall through */
case GMU_IDLE_STATE_SPTP:
gmu_write(gmu, REG_A6XX_GMU_PWR_COL_SPTPRAC_HYST,
GMU_PWR_COL_HYST);
gmu_rmw(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_CTRL, 0,
A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_IFPC_ENABLE |
A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_SPTPRAC_POWER_CONTROL_ENABLE);
}
/* Enable RPMh GPU client */
gmu_rmw(gmu, REG_A6XX_GMU_RPMH_CTRL, 0,
A6XX_GMU_RPMH_CTRL_RPMH_INTERFACE_ENABLE |
A6XX_GMU_RPMH_CTRL_LLC_VOTE_ENABLE |
A6XX_GMU_RPMH_CTRL_DDR_VOTE_ENABLE |
A6XX_GMU_RPMH_CTRL_MX_VOTE_ENABLE |
A6XX_GMU_RPMH_CTRL_CX_VOTE_ENABLE |
A6XX_GMU_RPMH_CTRL_GFX_VOTE_ENABLE);
}
static int a6xx_gmu_fw_start(struct a6xx_gmu *gmu, unsigned int state)
{
static bool rpmh_init;
struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
int i, ret;
u32 chipid;
u32 *image;
if (state == GMU_WARM_BOOT) {
ret = a6xx_rpmh_start(gmu);
if (ret)
return ret;
} else {
if (WARN(!adreno_gpu->fw[ADRENO_FW_GMU],
"GMU firmware is not loaded\n"))
return -ENOENT;
/* Sanity check the size of the firmware that was loaded */
if (adreno_gpu->fw[ADRENO_FW_GMU]->size > 0x8000) {
dev_err(gmu->dev,
"GMU firmware is bigger than the available region\n");
return -EINVAL;
}
/* Turn on register retention */
gmu_write(gmu, REG_A6XX_GMU_GENERAL_7, 1);
/* We only need to load the RPMh microcode once */
if (!rpmh_init) {
a6xx_gmu_rpmh_init(gmu);
rpmh_init = true;
} else if (state != GMU_RESET) {
ret = a6xx_rpmh_start(gmu);
if (ret)
return ret;
}
image = (u32 *) adreno_gpu->fw[ADRENO_FW_GMU]->data;
for (i = 0; i < adreno_gpu->fw[ADRENO_FW_GMU]->size >> 2; i++)
gmu_write(gmu, REG_A6XX_GMU_CM3_ITCM_START + i,
image[i]);
}
gmu_write(gmu, REG_A6XX_GMU_CM3_FW_INIT_RESULT, 0);
gmu_write(gmu, REG_A6XX_GMU_CM3_BOOT_CONFIG, 0x02);
/* Write the iova of the HFI table */
gmu_write(gmu, REG_A6XX_GMU_HFI_QTBL_ADDR, gmu->hfi->iova);
gmu_write(gmu, REG_A6XX_GMU_HFI_QTBL_INFO, 1);
gmu_write(gmu, REG_A6XX_GMU_AHB_FENCE_RANGE_0,
(1 << 31) | (0xa << 18) | (0xa0));
chipid = adreno_gpu->rev.core << 24;
chipid |= adreno_gpu->rev.major << 16;
chipid |= adreno_gpu->rev.minor << 12;
chipid |= adreno_gpu->rev.patchid << 8;
gmu_write(gmu, REG_A6XX_GMU_HFI_SFR_ADDR, chipid);
/* Set up the lowest idle level on the GMU */
a6xx_gmu_power_config(gmu);
ret = a6xx_gmu_start(gmu);
if (ret)
return ret;
ret = a6xx_gmu_gfx_rail_on(gmu);
if (ret)
return ret;
/* Enable SPTP_PC if the CPU is responsible for it */
if (gmu->idle_level < GMU_IDLE_STATE_SPTP) {
ret = a6xx_sptprac_enable(gmu);
if (ret)
return ret;
}
ret = a6xx_gmu_hfi_start(gmu);
if (ret)
return ret;
/* FIXME: Do we need this wmb() here? */
wmb();
return 0;
}
#define A6XX_HFI_IRQ_MASK \
(A6XX_GMU_GMU2HOST_INTR_INFO_MSGQ | \
A6XX_GMU_GMU2HOST_INTR_INFO_CM3_FAULT)
#define A6XX_GMU_IRQ_MASK \
(A6XX_GMU_AO_HOST_INTERRUPT_STATUS_WDOG_BITE | \
A6XX_GMU_AO_HOST_INTERRUPT_STATUS_HOST_AHB_BUS_ERROR | \
A6XX_GMU_AO_HOST_INTERRUPT_STATUS_FENCE_ERR)
static void a6xx_gmu_irq_enable(struct a6xx_gmu *gmu)
{
gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_CLR, ~0);
gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_CLR, ~0);
gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_MASK,
~A6XX_GMU_IRQ_MASK);
gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_MASK,
~A6XX_HFI_IRQ_MASK);
enable_irq(gmu->gmu_irq);
enable_irq(gmu->hfi_irq);
}
static void a6xx_gmu_irq_disable(struct a6xx_gmu *gmu)
{
disable_irq(gmu->gmu_irq);
disable_irq(gmu->hfi_irq);
gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_MASK, ~0);
gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_MASK, ~0);
}
int a6xx_gmu_reset(struct a6xx_gpu *a6xx_gpu)
{
struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
int ret;
u32 val;
/* Flush all the queues */
a6xx_hfi_stop(gmu);
/* Stop the interrupts */
a6xx_gmu_irq_disable(gmu);
/* Force off SPTP in case the GMU is managing it */
a6xx_sptprac_disable(gmu);
/* Make sure there are no outstanding RPMh votes */
gmu_poll_timeout(gmu, REG_A6XX_RSCC_TCS0_DRV0_STATUS, val,
(val & 1), 100, 10000);
gmu_poll_timeout(gmu, REG_A6XX_RSCC_TCS1_DRV0_STATUS, val,
(val & 1), 100, 10000);
gmu_poll_timeout(gmu, REG_A6XX_RSCC_TCS2_DRV0_STATUS, val,
(val & 1), 100, 10000);
gmu_poll_timeout(gmu, REG_A6XX_RSCC_TCS3_DRV0_STATUS, val,
(val & 1), 100, 1000);
/* Force off the GX GSDC */
regulator_force_disable(gmu->gx);
/* Disable the resources */
clk_bulk_disable_unprepare(gmu->nr_clocks, gmu->clocks);
pm_runtime_put_sync(gmu->dev);
/* Re-enable the resources */
pm_runtime_get_sync(gmu->dev);
/* Use a known rate to bring up the GMU */
clk_set_rate(gmu->core_clk, 200000000);
ret = clk_bulk_prepare_enable(gmu->nr_clocks, gmu->clocks);
if (ret)
goto out;
a6xx_gmu_irq_enable(gmu);
ret = a6xx_gmu_fw_start(gmu, GMU_RESET);
if (!ret)
ret = a6xx_hfi_start(gmu, GMU_COLD_BOOT);
/* Set the GPU back to the highest power frequency */
a6xx_gmu_set_freq(gmu, gmu->nr_gpu_freqs - 1);
out:
if (ret)
a6xx_gmu_clear_oob(gmu, GMU_OOB_BOOT_SLUMBER);
return ret;
}
int a6xx_gmu_resume(struct a6xx_gpu *a6xx_gpu)
{
struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
int status, ret;
if (WARN(!gmu->mmio, "The GMU is not set up yet\n"))
return 0;
/* Turn on the resources */
pm_runtime_get_sync(gmu->dev);
/* Use a known rate to bring up the GMU */
clk_set_rate(gmu->core_clk, 200000000);
ret = clk_bulk_prepare_enable(gmu->nr_clocks, gmu->clocks);
if (ret)
goto out;
a6xx_gmu_irq_enable(gmu);
/* Check to see if we are doing a cold or warm boot */
status = gmu_read(gmu, REG_A6XX_GMU_GENERAL_7) == 1 ?
GMU_WARM_BOOT : GMU_COLD_BOOT;
ret = a6xx_gmu_fw_start(gmu, status);
if (ret)
goto out;
ret = a6xx_hfi_start(gmu, status);
/* Set the GPU to the highest power frequency */
a6xx_gmu_set_freq(gmu, gmu->nr_gpu_freqs - 1);
out:
/* Make sure to turn off the boot OOB request on error */
if (ret)
a6xx_gmu_clear_oob(gmu, GMU_OOB_BOOT_SLUMBER);
return ret;
}
bool a6xx_gmu_isidle(struct a6xx_gmu *gmu)
{
u32 reg;
if (!gmu->mmio)
return true;
reg = gmu_read(gmu, REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS);
if (reg & A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS_GPUBUSYIGNAHB)
return false;
return true;
}
int a6xx_gmu_stop(struct a6xx_gpu *a6xx_gpu)
{
struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
u32 val;
/*
* The GMU may still be in slumber unless the GPU started so check and
* skip putting it back into slumber if so
*/
val = gmu_read(gmu, REG_A6XX_GPU_GMU_CX_GMU_RPMH_POWER_STATE);
if (val != 0xf) {
int ret = a6xx_gmu_wait_for_idle(a6xx_gpu);
/* Temporary until we can recover safely */
BUG_ON(ret);
/* tell the GMU we want to slumber */
a6xx_gmu_notify_slumber(gmu);
ret = gmu_poll_timeout(gmu,
REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS, val,
!(val & A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS_GPUBUSYIGNAHB),
100, 10000);
/*
* Let the user know we failed to slumber but don't worry too
* much because we are powering down anyway
*/
if (ret)
dev_err(gmu->dev,
"Unable to slumber GMU: status = 0%x/0%x\n",
gmu_read(gmu,
REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS),
gmu_read(gmu,
REG_A6XX_GPU_GMU_AO_GPU_CX_BUSY_STATUS2));
}
/* Turn off HFI */
a6xx_hfi_stop(gmu);
/* Stop the interrupts and mask the hardware */
a6xx_gmu_irq_disable(gmu);
/* Tell RPMh to power off the GPU */
a6xx_rpmh_stop(gmu);
clk_bulk_disable_unprepare(gmu->nr_clocks, gmu->clocks);
pm_runtime_put_sync(gmu->dev);
return 0;
}
static void a6xx_gmu_memory_free(struct a6xx_gmu *gmu, struct a6xx_gmu_bo *bo)
{
int count, i;
u64 iova;
if (IS_ERR_OR_NULL(bo))
return;
count = bo->size >> PAGE_SHIFT;
iova = bo->iova;
for (i = 0; i < count; i++, iova += PAGE_SIZE) {
iommu_unmap(gmu->domain, iova, PAGE_SIZE);
__free_pages(bo->pages[i], 0);
}
kfree(bo->pages);
kfree(bo);
}
static struct a6xx_gmu_bo *a6xx_gmu_memory_alloc(struct a6xx_gmu *gmu,
size_t size)
{
struct a6xx_gmu_bo *bo;
int ret, count, i;
bo = kzalloc(sizeof(*bo), GFP_KERNEL);
if (!bo)
return ERR_PTR(-ENOMEM);
bo->size = PAGE_ALIGN(size);
count = bo->size >> PAGE_SHIFT;
bo->pages = kcalloc(count, sizeof(struct page *), GFP_KERNEL);
if (!bo->pages) {
kfree(bo);
return ERR_PTR(-ENOMEM);
}
for (i = 0; i < count; i++) {
bo->pages[i] = alloc_page(GFP_KERNEL);
if (!bo->pages[i])
goto err;
}
bo->iova = gmu->uncached_iova_base;
for (i = 0; i < count; i++) {
ret = iommu_map(gmu->domain,
bo->iova + (PAGE_SIZE * i),
page_to_phys(bo->pages[i]), PAGE_SIZE,
IOMMU_READ | IOMMU_WRITE);
if (ret) {
dev_err(gmu->dev, "Unable to map GMU buffer object\n");
for (i = i - 1 ; i >= 0; i--)
iommu_unmap(gmu->domain,
bo->iova + (PAGE_SIZE * i),
PAGE_SIZE);
goto err;
}
}
bo->virt = vmap(bo->pages, count, VM_IOREMAP,
pgprot_writecombine(PAGE_KERNEL));
if (!bo->virt)
goto err;
/* Align future IOVA addresses on 1MB boundaries */
gmu->uncached_iova_base += ALIGN(size, SZ_1M);
return bo;
err:
for (i = 0; i < count; i++) {
if (bo->pages[i])
__free_pages(bo->pages[i], 0);
}
kfree(bo->pages);
kfree(bo);
return ERR_PTR(-ENOMEM);
}
static int a6xx_gmu_memory_probe(struct a6xx_gmu *gmu)
{
int ret;
/*
* The GMU address space is hardcoded to treat the range
* 0x60000000 - 0x80000000 as un-cached memory. All buffers shared
* between the GMU and the CPU will live in this space
*/
gmu->uncached_iova_base = 0x60000000;
gmu->domain = iommu_domain_alloc(&platform_bus_type);
if (!gmu->domain)
return -ENODEV;
ret = iommu_attach_device(gmu->domain, gmu->dev);
if (ret) {
iommu_domain_free(gmu->domain);
gmu->domain = NULL;
}
return ret;
}
/* Get the list of RPMh voltage levels from cmd-db */
static int a6xx_gmu_rpmh_arc_cmds(const char *id, void *vals, int size)
{
u32 len = cmd_db_read_aux_data_len(id);
if (!len)
return 0;
if (WARN_ON(len > size))
return -EINVAL;
cmd_db_read_aux_data(id, vals, len);
/*
* The data comes back as an array of unsigned shorts so adjust the
* count accordingly
*/
return len >> 1;
}
/* Return the 'arc-level' for the given frequency */
static u32 a6xx_gmu_get_arc_level(struct device *dev, unsigned long freq)
{
struct dev_pm_opp *opp;
struct device_node *np;
u32 val = 0;
if (!freq)
return 0;
opp = dev_pm_opp_find_freq_exact(dev, freq, true);
if (IS_ERR(opp))
return 0;
np = dev_pm_opp_get_of_node(opp);
if (np) {
of_property_read_u32(np, "opp-level", &val);
of_node_put(np);
}
dev_pm_opp_put(opp);
return val;
}
static int a6xx_gmu_rpmh_arc_votes_init(struct device *dev, u32 *votes,
unsigned long *freqs, int freqs_count,
u16 *pri, int pri_count,
u16 *sec, int sec_count)
{
int i, j;
/* Construct a vote for each frequency */
for (i = 0; i < freqs_count; i++) {
u8 pindex = 0, sindex = 0;
u32 level = a6xx_gmu_get_arc_level(dev, freqs[i]);
/* Get the primary index that matches the arc level */
for (j = 0; j < pri_count; j++) {
if (pri[j] >= level) {
pindex = j;
break;
}
}
if (j == pri_count) {
dev_err(dev,
"Level %u not found in in the RPMh list\n",
level);
dev_err(dev, "Available levels:\n");
for (j = 0; j < pri_count; j++)
dev_err(dev, " %u\n", pri[j]);
return -EINVAL;
}
/*
* Look for a level in in the secondary list that matches. If
* nothing fits, use the maximum non zero vote
*/
for (j = 0; j < sec_count; j++) {
if (sec[j] >= level) {
sindex = j;
break;
} else if (sec[j]) {
sindex = j;
}
}
/* Construct the vote */
votes[i] = ((pri[pindex] & 0xffff) << 16) |
(sindex << 8) | pindex;
}
return 0;
}
/*
* The GMU votes with the RPMh for itself and on behalf of the GPU but we need
* to construct the list of votes on the CPU and send it over. Query the RPMh
* voltage levels and build the votes
*/
static int a6xx_gmu_rpmh_votes_init(struct a6xx_gmu *gmu)
{
struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
struct msm_gpu *gpu = &adreno_gpu->base;
u16 gx[16], cx[16], mx[16];
u32 gxcount, cxcount, mxcount;
int ret;
/* Get the list of available voltage levels for each component */
gxcount = a6xx_gmu_rpmh_arc_cmds("gfx.lvl", gx, sizeof(gx));
cxcount = a6xx_gmu_rpmh_arc_cmds("cx.lvl", cx, sizeof(cx));
mxcount = a6xx_gmu_rpmh_arc_cmds("mx.lvl", mx, sizeof(mx));
/* Build the GX votes */
ret = a6xx_gmu_rpmh_arc_votes_init(&gpu->pdev->dev, gmu->gx_arc_votes,
gmu->gpu_freqs, gmu->nr_gpu_freqs,
gx, gxcount, mx, mxcount);
/* Build the CX votes */
ret |= a6xx_gmu_rpmh_arc_votes_init(gmu->dev, gmu->cx_arc_votes,
gmu->gmu_freqs, gmu->nr_gmu_freqs,
cx, cxcount, mx, mxcount);
return ret;
}
static int a6xx_gmu_build_freq_table(struct device *dev, unsigned long *freqs,
u32 size)
{
int count = dev_pm_opp_get_opp_count(dev);
struct dev_pm_opp *opp;
int i, index = 0;
unsigned long freq = 1;
/*
* The OPP table doesn't contain the "off" frequency level so we need to
* add 1 to the table size to account for it
*/
if (WARN(count + 1 > size,
"The GMU frequency table is being truncated\n"))
count = size - 1;
/* Set the "off" frequency */
freqs[index++] = 0;
for (i = 0; i < count; i++) {
opp = dev_pm_opp_find_freq_ceil(dev, &freq);
if (IS_ERR(opp))
break;
dev_pm_opp_put(opp);
freqs[index++] = freq++;
}
return index;
}
static int a6xx_gmu_pwrlevels_probe(struct a6xx_gmu *gmu)
{
struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
struct msm_gpu *gpu = &adreno_gpu->base;
int ret = 0;
/*
* The GMU handles its own frequency switching so build a list of
* available frequencies to send during initialization
*/
ret = dev_pm_opp_of_add_table(gmu->dev);
if (ret) {
dev_err(gmu->dev, "Unable to set the OPP table for the GMU\n");
return ret;
}
gmu->nr_gmu_freqs = a6xx_gmu_build_freq_table(gmu->dev,
gmu->gmu_freqs, ARRAY_SIZE(gmu->gmu_freqs));
/*
* The GMU also handles GPU frequency switching so build a list
* from the GPU OPP table
*/
gmu->nr_gpu_freqs = a6xx_gmu_build_freq_table(&gpu->pdev->dev,
gmu->gpu_freqs, ARRAY_SIZE(gmu->gpu_freqs));
/* Build the list of RPMh votes that we'll send to the GMU */
return a6xx_gmu_rpmh_votes_init(gmu);
}
static int a6xx_gmu_clocks_probe(struct a6xx_gmu *gmu)
{
int ret = msm_clk_bulk_get(gmu->dev, &gmu->clocks);
if (ret < 1)
return ret;
gmu->nr_clocks = ret;
gmu->core_clk = msm_clk_bulk_get_clock(gmu->clocks,
gmu->nr_clocks, "gmu");
return 0;
}
static void __iomem *a6xx_gmu_get_mmio(struct platform_device *pdev,
const char *name)
{
void __iomem *ret;
struct resource *res = platform_get_resource_byname(pdev,
IORESOURCE_MEM, name);
if (!res) {
dev_err(&pdev->dev, "Unable to find the %s registers\n", name);
return ERR_PTR(-EINVAL);
}
ret = devm_ioremap(&pdev->dev, res->start, resource_size(res));
if (!ret) {
dev_err(&pdev->dev, "Unable to map the %s registers\n", name);
return ERR_PTR(-EINVAL);
}
return ret;
}
static int a6xx_gmu_get_irq(struct a6xx_gmu *gmu, struct platform_device *pdev,
const char *name, irq_handler_t handler)
{
int irq, ret;
irq = platform_get_irq_byname(pdev, name);
ret = devm_request_irq(&pdev->dev, irq, handler, IRQF_TRIGGER_HIGH,
name, gmu);
if (ret) {
dev_err(&pdev->dev, "Unable to get interrupt %s\n", name);
return ret;
}
disable_irq(irq);
return irq;
}
void a6xx_gmu_remove(struct a6xx_gpu *a6xx_gpu)
{
struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
if (IS_ERR_OR_NULL(gmu->mmio))
return;
pm_runtime_disable(gmu->dev);
a6xx_gmu_stop(a6xx_gpu);
a6xx_gmu_irq_disable(gmu);
a6xx_gmu_memory_free(gmu, gmu->hfi);
iommu_detach_device(gmu->domain, gmu->dev);
iommu_domain_free(gmu->domain);
}
int a6xx_gmu_probe(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
{
struct a6xx_gmu *gmu = &a6xx_gpu->gmu;
struct platform_device *pdev = of_find_device_by_node(node);
int ret;
if (!pdev)
return -ENODEV;
gmu->dev = &pdev->dev;
of_dma_configure(gmu->dev, node, true);
/* Fow now, don't do anything fancy until we get our feet under us */
gmu->idle_level = GMU_IDLE_STATE_ACTIVE;
pm_runtime_enable(gmu->dev);
gmu->gx = devm_regulator_get(gmu->dev, "vdd");
/* Get the list of clocks */
ret = a6xx_gmu_clocks_probe(gmu);
if (ret)
return ret;
/* Set up the IOMMU context bank */
ret = a6xx_gmu_memory_probe(gmu);
if (ret)
return ret;
/* Allocate memory for for the HFI queues */
gmu->hfi = a6xx_gmu_memory_alloc(gmu, SZ_16K);
if (IS_ERR(gmu->hfi))
goto err;
/* Allocate memory for the GMU debug region */
gmu->debug = a6xx_gmu_memory_alloc(gmu, SZ_16K);
if (IS_ERR(gmu->debug))
goto err;
/* Map the GMU registers */
gmu->mmio = a6xx_gmu_get_mmio(pdev, "gmu");
/* Map the GPU power domain controller registers */
gmu->pdc_mmio = a6xx_gmu_get_mmio(pdev, "gmu_pdc");
if (IS_ERR(gmu->mmio) || IS_ERR(gmu->pdc_mmio))
goto err;
/* Get the HFI and GMU interrupts */
gmu->hfi_irq = a6xx_gmu_get_irq(gmu, pdev, "hfi", a6xx_hfi_irq);
gmu->gmu_irq = a6xx_gmu_get_irq(gmu, pdev, "gmu", a6xx_gmu_irq);
if (gmu->hfi_irq < 0 || gmu->gmu_irq < 0)
goto err;
/* Set up a tasklet to handle GMU HFI responses */
tasklet_init(&gmu->hfi_tasklet, a6xx_hfi_task, (unsigned long) gmu);
/* Get the power levels for the GMU and GPU */
a6xx_gmu_pwrlevels_probe(gmu);
/* Set up the HFI queues */
a6xx_hfi_init(gmu);
return 0;
err:
a6xx_gmu_memory_free(gmu, gmu->hfi);
if (gmu->domain) {
iommu_detach_device(gmu->domain, gmu->dev);
iommu_domain_free(gmu->domain);
}
return -ENODEV;
}