[PATCH v3 6/6] scsi: ufs: ufs-mediatek: Add MCQ support for MTK platform

From: Po-Wen Kao
Date: Thu Feb 23 2023 - 10:28:52 EST

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Changes
- Implement vops and setup irq
- Fix pm flow under mcq mode

Signed-off-by: Po-Wen Kao <powen.kao@xxxxxxxxxxxx>
---
drivers/ufs/host/ufs-mediatek.c | 193 +++++++++++++++++++++++++++++++-
drivers/ufs/host/ufs-mediatek.h | 33 ++++++
2 files changed, 224 insertions(+), 2 deletions(-)

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index 21d9b047539f..162bbde675aa 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -30,6 +30,14 @@
#define CREATE_TRACE_POINTS
#include "ufs-mediatek-trace.h"

+static int ufs_mtk_config_mcq(struct ufs_hba *hba, bool irq);
+static void ufs_mtk_dbg_register_dump(struct ufs_hba *hba);
+
+#define MAX_SUPP_MAC 64
+#define MCQ_QUEUE_OFFSET(c) ((((c) >> 16) & 0xFF) * 0x200)
+
+static unsigned int mtk_mcq_irq[UFSHCD_MAX_Q_NR];
+
static const struct ufs_dev_quirk ufs_mtk_dev_fixups[] = {
{ .wmanufacturerid = UFS_ANY_VENDOR,
.model = UFS_ANY_MODEL,
@@ -843,6 +851,19 @@ static void ufs_mtk_vreg_fix_vccqx(struct ufs_hba *hba)
}
}

+static void ufs_mtk_init_interrupt(struct ufs_hba *hba)
+{
+ struct ufs_mtk_host *host = ufshcd_get_variant(hba);
+ int i;
+
+ host->mcq_nr_intr = UFSHCD_MAX_Q_NR;
+
+ for (i = 0; i < host->mcq_nr_intr; i++) {
+ host->mcq_intr_info[i].hba = hba;
+ host->mcq_intr_info[i].intr = mtk_mcq_irq[i];
+ }
+}
+
/**
* ufs_mtk_init - find other essential mmio bases
* @hba: host controller instance
@@ -879,6 +900,8 @@ static int ufs_mtk_init(struct ufs_hba *hba)
/* Initialize host capability */
ufs_mtk_init_host_caps(hba);

+ ufs_mtk_init_interrupt(hba);
+
err = ufs_mtk_bind_mphy(hba);
if (err)
goto out_variant_clear;
@@ -1174,7 +1197,16 @@ static int ufs_mtk_link_set_hpm(struct ufs_hba *hba)
else
return err;

- err = ufshcd_make_hba_operational(hba);
+ if (!hba->mcq_enabled)
+ err = ufshcd_make_hba_operational(hba);
+ else {
+ ufs_mtk_config_mcq(hba, false);
+ ufshcd_mcq_make_queues_operational(hba);
+ ufshcd_mcq_config_mac(hba, hba->nutrs);
+ ufshcd_writel(hba, ufshcd_readl(hba, REG_UFS_MEM_CFG) | 0x1,
+ REG_UFS_MEM_CFG);
+ }
+
if (err)
return err;

@@ -1361,6 +1393,12 @@ static int ufs_mtk_apply_dev_quirks(struct ufs_hba *hba)
ufshcd_dme_set(hba, UIC_ARG_MIB(PA_HIBERN8TIME), 10);
}

+ /*
+ * Disable MCQ_CQ_EVENT interrupt.
+ * Use CQ Tail Entry Push Status instead.
+ */
+ ufshcd_disable_intr(hba, MCQ_CQ_EVENT_STATUS);
+
/*
* Decide waiting time before gating reference clock and
* after ungating reference clock according to vendors'
@@ -1498,6 +1536,116 @@ static int ufs_mtk_clk_scale_notify(struct ufs_hba *hba, bool scale_up,
return 0;
}

+static int ufs_mtk_get_hba_mac(struct ufs_hba *hba)
+{
+ return MAX_SUPP_MAC;
+}
+
+static int ufs_mtk_op_runtime_config(struct ufs_hba *hba)
+{
+ struct ufshcd_mcq_opr_info_t *opr;
+ int i;
+
+ for (i = 0; i < OPR_MAX; i++) {
+ opr = &hba->mcq_opr[i];
+ opr->stride = REG_UFS_MCQ_STRIDE;
+ }
+
+ hba->mcq_opr[OPR_SQD].offset = REG_UFS_MTK_SQD;
+ hba->mcq_opr[OPR_SQIS].offset = REG_UFS_MTK_SQIS;
+ hba->mcq_opr[OPR_CQD].offset = REG_UFS_MTK_CQD;
+ hba->mcq_opr[OPR_CQIS].offset = REG_UFS_MTK_CQIS;
+
+ hba->mcq_opr[OPR_SQD].base = hba->mmio_base + REG_UFS_MTK_SQD;
+ hba->mcq_opr[OPR_SQIS].base = hba->mmio_base + REG_UFS_MTK_SQIS;
+ hba->mcq_opr[OPR_CQD].base = hba->mmio_base + REG_UFS_MTK_CQD;
+ hba->mcq_opr[OPR_CQIS].base = hba->mmio_base + REG_UFS_MTK_CQIS;
+
+ return 0;
+}
+
+static int ufs_mtk_mcq_config_resource(struct ufs_hba *hba)
+{
+ hba->mcq_base = hba->mmio_base + MCQ_QUEUE_OFFSET(hba->mcq_capabilities);
+ return 0;
+}
+
+static irqreturn_t ufs_mtk_mcq_intr(int irq, void *__intr_info)
+{
+ struct ufs_mtk_mcq_intr_info *mcq_intr_info = __intr_info;
+ struct ufs_hba *hba = mcq_intr_info->hba;
+ struct ufs_hw_queue *hwq;
+ u32 events;
+ int i = mcq_intr_info->qid;
+
+ hwq = &hba->uhq[i];
+
+ events = ufshcd_mcq_read_cqis(hba, i);
+ if (events)
+ ufshcd_mcq_write_cqis(hba, events, i);
+
+ if (events & UFSHCD_MCQ_CQIS_TAIL_ENT_PUSH_STS)
+ ufshcd_mcq_poll_cqe_nolock(hba, hwq);
+
+ return IRQ_HANDLED;
+}
+
+static int ufs_mtk_config_mcq_irq(struct ufs_hba *hba)
+{
+ struct ufs_mtk_host *host = ufshcd_get_variant(hba);
+ u32 irq, i;
+ int ret;
+
+ for (i = 0; i < host->mcq_nr_intr; i++) {
+ irq = host->mcq_intr_info[i].intr;
+ if (irq == MTK_MCQ_INVALID_IRQ) {
+ dev_err(hba->dev, "invalid irq. %d\n", i);
+ return -ENOPARAM;
+ }
+
+ host->mcq_intr_info[i].qid = i;
+ ret = devm_request_irq(hba->dev, irq, ufs_mtk_mcq_intr, 0, UFSHCD,
+ &host->mcq_intr_info[i]);
+
+ dev_info(hba->dev, "request irq %d intr %s\n", irq, ret ? "failed": "");
+
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ufs_mtk_config_mcq(struct ufs_hba *hba, bool irq)
+{
+ struct ufs_mtk_host *host = ufshcd_get_variant(hba);
+ int ret = 0;
+
+ if (!host->mcq_set_intr) {
+
+ /* Disable irq option register */
+ ufshcd_rmwl(hba, MCQ_INTR_EN_MSK, 0, REG_UFS_MMIO_OPT_CTRL_0);
+
+ if (irq)
+ ret = ufs_mtk_config_mcq_irq(hba);
+
+ if (ret)
+ return ret;
+
+ host->mcq_set_intr = true;
+ }
+
+ ufshcd_rmwl(hba, MCQ_AH8, MCQ_AH8, REG_UFS_MMIO_OPT_CTRL_0);
+ ufshcd_rmwl(hba, MCQ_INTR_EN_MSK, MCQ_MULTI_INTR_EN, REG_UFS_MMIO_OPT_CTRL_0);
+
+ return 0;
+}
+
+static int ufs_mtk_config_esi(struct ufs_hba *hba)
+{
+ return ufs_mtk_config_mcq(hba, true);
+}
+
/*
* struct ufs_hba_mtk_vops - UFS MTK specific variant operations
*
@@ -1521,8 +1669,43 @@ static const struct ufs_hba_variant_ops ufs_hba_mtk_vops = {
.event_notify = ufs_mtk_event_notify,
.config_scaling_param = ufs_mtk_config_scaling_param,
.clk_scale_notify = ufs_mtk_clk_scale_notify,
+ /* mcq vops */
+ .get_hba_mac = ufs_mtk_get_hba_mac,
+ .op_runtime_config = ufs_mtk_op_runtime_config,
+ .mcq_config_resource = ufs_mtk_mcq_config_resource,
+ .config_esi = ufs_mtk_config_esi,
};

+static int ufs_mtk_mcq_get_irq(struct platform_device *pdev)
+{
+ int i, irq, cnt;
+
+ for (i = 0; i < UFSHCD_MAX_Q_NR; i++)
+ mtk_mcq_irq[i] = MTK_MCQ_INVALID_IRQ;
+
+ cnt = platform_irq_count(pdev);
+
+ if (cnt < 0)
+ return cnt;
+
+ /* no irq for mcq */
+ if (cnt == 1)
+ return 0;
+
+ for (i = 0; i < UFSHCD_MAX_Q_NR; i++) {
+ /* irq index 0 is ufshcd system irq, sq, cq irq start from index 1 */
+ irq = platform_get_irq(pdev, i + 1);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "get platform mcq irq fail: %d\n", i);
+ return irq;
+ }
+ mtk_mcq_irq[i] = irq;
+ dev_info(&pdev->dev, "get platform mcq irq: %d, %d\n", i, irq);
+ }
+
+ return 0;
+}
+
/**
* ufs_mtk_probe - probe routine of the driver
* @pdev: pointer to Platform device handle
@@ -1562,12 +1745,18 @@ static int ufs_mtk_probe(struct platform_device *pdev)
}

skip_reset:
+ err = ufs_mtk_mcq_get_irq(pdev);
+ if (err) {
+ dev_err(dev, "get irq failed %d\n", err);
+ goto out;
+ }
+
/* perform generic probe */
err = ufshcd_pltfrm_init(pdev, &ufs_hba_mtk_vops);

out:
if (err)
- dev_info(dev, "probe failed %d\n", err);
+ dev_err(dev, "probe failed %d\n", err);

of_node_put(reset_node);
return err;
diff --git a/drivers/ufs/host/ufs-mediatek.h b/drivers/ufs/host/ufs-mediatek.h
index 2fc6d7b87694..542b4c3a763c 100644
--- a/drivers/ufs/host/ufs-mediatek.h
+++ b/drivers/ufs/host/ufs-mediatek.h
@@ -10,11 +10,27 @@
#include <linux/pm_qos.h>
#include <linux/soc/mediatek/mtk_sip_svc.h>

+/*
+ * MCQ define and struct
+ */
+#define UFSHCD_MAX_Q_NR 8
+#define MTK_MCQ_INVALID_IRQ 0xFFFF
+
+/* REG_UFS_MMIO_OPT_CTRL_0 160h */
+#define EHS_EN 0x1
+#define PFM_IMPV 0x2
+#define MCQ_MULTI_INTR_EN 0x4
+#define MCQ_CMB_INTR_EN 0x8
+#define MCQ_AH8 0x10
+
+#define MCQ_INTR_EN_MSK (MCQ_MULTI_INTR_EN | MCQ_CMB_INTR_EN)
+
/*
* Vendor specific UFSHCI Registers
*/
#define REG_UFS_XOUFS_CTRL 0x140
#define REG_UFS_REFCLK_CTRL 0x144
+#define REG_UFS_MMIO_OPT_CTRL_0 0x160
#define REG_UFS_EXTREG 0x2100
#define REG_UFS_MPHYCTRL 0x2200
#define REG_UFS_MTK_IP_VER 0x2240
@@ -26,6 +42,13 @@
#define REG_UFS_DEBUG_SEL_B2 0x22D8
#define REG_UFS_DEBUG_SEL_B3 0x22DC

+#define REG_UFS_MTK_SQD 0x2800
+#define REG_UFS_MTK_SQIS 0x2814
+#define REG_UFS_MTK_CQD 0x281C
+#define REG_UFS_MTK_CQIS 0x2824
+
+#define REG_UFS_MCQ_STRIDE 0x30
+
/*
* Ref-clk control
*
@@ -136,6 +159,12 @@ struct ufs_mtk_hw_ver {
u8 major;
};

+struct ufs_mtk_mcq_intr_info {
+ struct ufs_hba *hba;
+ u32 intr;
+ u8 qid;
+};
+
struct ufs_mtk_host {
struct phy *mphy;
struct pm_qos_request pm_qos_req;
@@ -155,6 +184,10 @@ struct ufs_mtk_host {
u16 ref_clk_ungating_wait_us;
u16 ref_clk_gating_wait_us;
u32 ip_ver;
+
+ bool mcq_set_intr;
+ int mcq_nr_intr;
+ struct ufs_mtk_mcq_intr_info mcq_intr_info[UFSHCD_MAX_Q_NR];
};

/*
--
2.18.0

Next message: Gregory Price: "Re: [PATCH v11 2/2] ptrace,syscall_user_dispatch: checkpoint/restore support for SUD"
Previous message: Po-Wen Kao: "[PATCH v3 5/6] scsi: ufs: core: Export symbols for MTK driver module"
In reply to: Po-Wen Kao: "[PATCH v3 5/6] scsi: ufs: core: Export symbols for MTK driver module"
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