mirror of https://github.com/hak5/openwrt-owl.git
135 lines
4.5 KiB
Diff
135 lines
4.5 KiB
Diff
From ab9d5c5c767c17bf9526f84beb5667f2a50e1a4d Mon Sep 17 00:00:00 2001
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From: Minghuan Lian <Minghuan.Lian@nxp.com>
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Date: Tue, 17 Jan 2017 17:32:42 +0800
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Subject: [PATCH] irqchip/ls-scfg-msi: add LS1043a v1.1 MSI support
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Cherry-pick patchwork patch with context adjustment.
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A MSI controller of LS1043a v1.0 only includes one MSIR and
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is assigned one GIC interrupt. In order to support affinity,
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LS1043a v1.1 MSI is assigned 4 MSIRs and 4 GIC interrupts.
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But the MSIR has the different offset and only supports 8 MSIs.
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The bits between variable bit_start and bit_end in structure
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ls_scfg_msir are used to show 8 MSI interrupts. msir_irqs and
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msir_base are added to describe the difference of MSI between
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LS1043a v1.1 and other SoCs.
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Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
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Acked-by: Rob Herring <robh@kernel.org>
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Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
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---
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drivers/irqchip/irq-ls-scfg-msi.c | 45 +++++++++++++++++++++++++++++++++------
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1 file changed, 39 insertions(+), 6 deletions(-)
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--- a/drivers/irqchip/irq-ls-scfg-msi.c
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+++ b/drivers/irqchip/irq-ls-scfg-msi.c
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@@ -25,14 +25,21 @@
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#define MSI_IRQS_PER_MSIR 32
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#define MSI_MSIR_OFFSET 4
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+#define MSI_LS1043V1_1_IRQS_PER_MSIR 8
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+#define MSI_LS1043V1_1_MSIR_OFFSET 0x10
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+
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struct ls_scfg_msi_cfg {
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u32 ibs_shift; /* Shift of interrupt bit select */
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+ u32 msir_irqs; /* The irq number per MSIR */
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+ u32 msir_base; /* The base address of MSIR */
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};
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struct ls_scfg_msir {
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struct ls_scfg_msi *msi_data;
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unsigned int index;
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unsigned int gic_irq;
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+ unsigned int bit_start;
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+ unsigned int bit_end;
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void __iomem *reg;
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};
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@@ -140,13 +147,18 @@ static void ls_scfg_msi_irq_handler(stru
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struct ls_scfg_msir *msir = irq_desc_get_handler_data(desc);
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struct ls_scfg_msi *msi_data = msir->msi_data;
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unsigned long val;
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- int pos, virq, hwirq;
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+ int pos, size, virq, hwirq;
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chained_irq_enter(irq_desc_get_chip(desc), desc);
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val = ioread32be(msir->reg);
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- for_each_set_bit(pos, &val, MSI_IRQS_PER_MSIR) {
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- hwirq = ((31 - pos) << msi_data->cfg->ibs_shift) | msir->index;
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+
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+ pos = msir->bit_start;
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+ size = msir->bit_end + 1;
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+
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+ for_each_set_bit_from(pos, &val, size) {
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+ hwirq = ((msir->bit_end - pos) << msi_data->cfg->ibs_shift) |
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+ msir->index;
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virq = irq_find_mapping(msi_data->parent, hwirq);
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if (virq)
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generic_handle_irq(virq);
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@@ -193,14 +205,24 @@ static int ls_scfg_msi_setup_hwirq(struc
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msir->index = index;
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msir->msi_data = msi_data;
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msir->gic_irq = virq;
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- msir->reg = msi_data->regs + MSI_MSIR_OFFSET + 4 * index;
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+ msir->reg = msi_data->regs + msi_data->cfg->msir_base + 4 * index;
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+
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+ if (msi_data->cfg->msir_irqs == MSI_LS1043V1_1_IRQS_PER_MSIR) {
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+ msir->bit_start = 32 - ((msir->index + 1) *
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+ MSI_LS1043V1_1_IRQS_PER_MSIR);
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+ msir->bit_end = msir->bit_start +
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+ MSI_LS1043V1_1_IRQS_PER_MSIR - 1;
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+ } else {
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+ msir->bit_start = 0;
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+ msir->bit_end = msi_data->cfg->msir_irqs - 1;
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+ }
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irq_set_chained_handler_and_data(msir->gic_irq,
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ls_scfg_msi_irq_handler,
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msir);
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/* Release the hwirqs corresponding to this MSIR */
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- for (i = 0; i < MSI_IRQS_PER_MSIR; i++) {
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+ for (i = 0; i < msi_data->cfg->msir_irqs; i++) {
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hwirq = i << msi_data->cfg->ibs_shift | msir->index;
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bitmap_clear(msi_data->used, hwirq, 1);
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}
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@@ -216,7 +238,7 @@ static int ls_scfg_msi_teardown_hwirq(st
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if (msir->gic_irq > 0)
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irq_set_chained_handler_and_data(msir->gic_irq, NULL, NULL);
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- for (i = 0; i < MSI_IRQS_PER_MSIR; i++) {
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+ for (i = 0; i < msi_data->cfg->msir_irqs; i++) {
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hwirq = i << msi_data->cfg->ibs_shift | msir->index;
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bitmap_set(msi_data->used, hwirq, 1);
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}
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@@ -226,10 +248,20 @@ static int ls_scfg_msi_teardown_hwirq(st
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static struct ls_scfg_msi_cfg ls1021_msi_cfg = {
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.ibs_shift = 3,
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+ .msir_irqs = MSI_IRQS_PER_MSIR,
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+ .msir_base = MSI_MSIR_OFFSET,
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};
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static struct ls_scfg_msi_cfg ls1046_msi_cfg = {
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.ibs_shift = 2,
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+ .msir_irqs = MSI_IRQS_PER_MSIR,
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+ .msir_base = MSI_MSIR_OFFSET,
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+};
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+
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+static struct ls_scfg_msi_cfg ls1043_v1_1_msi_cfg = {
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+ .ibs_shift = 2,
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+ .msir_irqs = MSI_LS1043V1_1_IRQS_PER_MSIR,
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+ .msir_base = MSI_LS1043V1_1_MSIR_OFFSET,
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};
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static const struct of_device_id ls_scfg_msi_id[] = {
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@@ -240,6 +272,7 @@ static const struct of_device_id ls_scfg
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{ .compatible = "fsl,ls1012a-msi", .data = &ls1021_msi_cfg },
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{ .compatible = "fsl,ls1021a-msi", .data = &ls1021_msi_cfg },
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{ .compatible = "fsl,ls1043a-msi", .data = &ls1021_msi_cfg },
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+ { .compatible = "fsl,ls1043a-v1.1-msi", .data = &ls1043_v1_1_msi_cfg },
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{ .compatible = "fsl,ls1046a-msi", .data = &ls1046_msi_cfg },
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{},
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};
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