summaryrefslogtreecommitdiffstats
path: root/arch/mips/pci
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/pci')
-rw-r--r--arch/mips/pci/Makefile2
-rw-r--r--arch/mips/pci/fixup-malta.c6
-rw-r--r--arch/mips/pci/msi-octeon.c6
-rw-r--r--arch/mips/pci/msi-xlp.c194
-rw-r--r--arch/mips/pci/ops-pmcmsp.c2
-rw-r--r--arch/mips/pci/ops-tx3927.c2
-rw-r--r--arch/mips/pci/ops-tx4927.c9
-rw-r--r--arch/mips/pci/pci-virtio-guest.c131
-rw-r--r--arch/mips/pci/pci-xlr.c10
9 files changed, 289 insertions, 73 deletions
diff --git a/arch/mips/pci/Makefile b/arch/mips/pci/Makefile
index d61138a177c..ff8a5539b36 100644
--- a/arch/mips/pci/Makefile
+++ b/arch/mips/pci/Makefile
@@ -21,7 +21,7 @@ obj-$(CONFIG_BCM63XX) += pci-bcm63xx.o fixup-bcm63xx.o \
obj-$(CONFIG_MIPS_ALCHEMY) += pci-alchemy.o
obj-$(CONFIG_SOC_AR71XX) += pci-ar71xx.o
obj-$(CONFIG_PCI_AR724X) += pci-ar724x.o
-
+obj-$(CONFIG_MIPS_PCI_VIRTIO) += pci-virtio-guest.o
#
# These are still pretty much in the old state, watch, go blind.
#
diff --git a/arch/mips/pci/fixup-malta.c b/arch/mips/pci/fixup-malta.c
index 2f9e52a1a75..40e920c653c 100644
--- a/arch/mips/pci/fixup-malta.c
+++ b/arch/mips/pci/fixup-malta.c
@@ -68,6 +68,7 @@ static void malta_piix_func0_fixup(struct pci_dev *pdev)
{
unsigned char reg_val;
u32 reg_val32;
+ u16 reg_val16;
/* PIIX PIRQC[A:D] irq mappings */
static int piixirqmap[PIIX4_FUNC0_PIRQRC_IRQ_ROUTING_MAX] = {
0, 0, 0, 3,
@@ -107,6 +108,11 @@ static void malta_piix_func0_fixup(struct pci_dev *pdev)
pci_read_config_byte(pdev, PIIX4_FUNC0_SERIRQC, &reg_val);
reg_val |= PIIX4_FUNC0_SERIRQC_EN | PIIX4_FUNC0_SERIRQC_CONT;
pci_write_config_byte(pdev, PIIX4_FUNC0_SERIRQC, reg_val);
+
+ /* Enable response to special cycles */
+ pci_read_config_word(pdev, PCI_COMMAND, &reg_val16);
+ pci_write_config_word(pdev, PCI_COMMAND,
+ reg_val16 | PCI_COMMAND_SPECIAL);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_0,
diff --git a/arch/mips/pci/msi-octeon.c b/arch/mips/pci/msi-octeon.c
index 2b91b0e6156..ab0c5d14c6f 100644
--- a/arch/mips/pci/msi-octeon.c
+++ b/arch/mips/pci/msi-octeon.c
@@ -15,6 +15,7 @@
#include <asm/octeon/cvmx-npi-defs.h>
#include <asm/octeon/cvmx-pci-defs.h>
#include <asm/octeon/cvmx-npei-defs.h>
+#include <asm/octeon/cvmx-sli-defs.h>
#include <asm/octeon/cvmx-pexp-defs.h>
#include <asm/octeon/pci-octeon.h>
@@ -162,6 +163,11 @@ msi_irq_allocated:
msg.address_lo = (0 + CVMX_NPEI_PCIE_MSI_RCV) & 0xffffffff;
msg.address_hi = (0 + CVMX_NPEI_PCIE_MSI_RCV) >> 32;
break;
+ case OCTEON_DMA_BAR_TYPE_PCIE2:
+ /* When using PCIe2, Bar 0 is based at 0 */
+ msg.address_lo = (0 + CVMX_SLI_PCIE_MSI_RCV) & 0xffffffff;
+ msg.address_hi = (0 + CVMX_SLI_PCIE_MSI_RCV) >> 32;
+ break;
default:
panic("arch_setup_msi_irq: Invalid octeon_dma_bar_type");
}
diff --git a/arch/mips/pci/msi-xlp.c b/arch/mips/pci/msi-xlp.c
index afd8405e018..fa374fe3746 100644
--- a/arch/mips/pci/msi-xlp.c
+++ b/arch/mips/pci/msi-xlp.c
@@ -56,8 +56,8 @@
#include <asm/netlogic/xlp-hal/bridge.h>
#define XLP_MSIVEC_PER_LINK 32
-#define XLP_MSIXVEC_TOTAL 32
-#define XLP_MSIXVEC_PER_LINK 8
+#define XLP_MSIXVEC_TOTAL (cpu_is_xlp9xx() ? 128 : 32)
+#define XLP_MSIXVEC_PER_LINK (cpu_is_xlp9xx() ? 32 : 8)
/* 128 MSI irqs per node, mapped starting at NLM_MSI_VEC_BASE */
static inline int nlm_link_msiirq(int link, int msivec)
@@ -65,35 +65,44 @@ static inline int nlm_link_msiirq(int link, int msivec)
return NLM_MSI_VEC_BASE + link * XLP_MSIVEC_PER_LINK + msivec;
}
+/* get the link MSI vector from irq number */
static inline int nlm_irq_msivec(int irq)
{
- return irq % XLP_MSIVEC_PER_LINK;
+ return (irq - NLM_MSI_VEC_BASE) % XLP_MSIVEC_PER_LINK;
}
+/* get the link from the irq number */
static inline int nlm_irq_msilink(int irq)
{
- return (irq % (XLP_MSIVEC_PER_LINK * PCIE_NLINKS)) /
- XLP_MSIVEC_PER_LINK;
+ int total_msivec = XLP_MSIVEC_PER_LINK * PCIE_NLINKS;
+
+ return ((irq - NLM_MSI_VEC_BASE) % total_msivec) /
+ XLP_MSIVEC_PER_LINK;
}
/*
- * Only 32 MSI-X vectors are possible because there are only 32 PIC
- * interrupts for MSI. We split them statically and use 8 MSI-X vectors
- * per link - this keeps the allocation and lookup simple.
+ * For XLP 8xx/4xx/3xx/2xx, only 32 MSI-X vectors are possible because
+ * there are only 32 PIC interrupts for MSI. We split them statically
+ * and use 8 MSI-X vectors per link - this keeps the allocation and
+ * lookup simple.
+ * On XLP 9xx, there are 32 vectors per link, and the interrupts are
+ * not routed thru PIC, so we can use all 128 MSI-X vectors.
*/
static inline int nlm_link_msixirq(int link, int bit)
{
return NLM_MSIX_VEC_BASE + link * XLP_MSIXVEC_PER_LINK + bit;
}
+/* get the link MSI vector from irq number */
static inline int nlm_irq_msixvec(int irq)
{
- return irq % XLP_MSIXVEC_TOTAL; /* works when given xirq */
+ return (irq - NLM_MSIX_VEC_BASE) % XLP_MSIXVEC_TOTAL;
}
-static inline int nlm_irq_msixlink(int irq)
+/* get the link from MSIX vec */
+static inline int nlm_irq_msixlink(int msixvec)
{
- return nlm_irq_msixvec(irq) / XLP_MSIXVEC_PER_LINK;
+ return msixvec / XLP_MSIXVEC_PER_LINK;
}
/*
@@ -129,7 +138,11 @@ static void xlp_msi_enable(struct irq_data *d)
vec = nlm_irq_msivec(d->irq);
spin_lock_irqsave(&md->msi_lock, flags);
md->msi_enabled_mask |= 1u << vec;
- nlm_write_reg(md->lnkbase, PCIE_MSI_EN, md->msi_enabled_mask);
+ if (cpu_is_xlp9xx())
+ nlm_write_reg(md->lnkbase, PCIE_9XX_MSI_EN,
+ md->msi_enabled_mask);
+ else
+ nlm_write_reg(md->lnkbase, PCIE_MSI_EN, md->msi_enabled_mask);
spin_unlock_irqrestore(&md->msi_lock, flags);
}
@@ -142,7 +155,11 @@ static void xlp_msi_disable(struct irq_data *d)
vec = nlm_irq_msivec(d->irq);
spin_lock_irqsave(&md->msi_lock, flags);
md->msi_enabled_mask &= ~(1u << vec);
- nlm_write_reg(md->lnkbase, PCIE_MSI_EN, md->msi_enabled_mask);
+ if (cpu_is_xlp9xx())
+ nlm_write_reg(md->lnkbase, PCIE_9XX_MSI_EN,
+ md->msi_enabled_mask);
+ else
+ nlm_write_reg(md->lnkbase, PCIE_MSI_EN, md->msi_enabled_mask);
spin_unlock_irqrestore(&md->msi_lock, flags);
}
@@ -156,11 +173,18 @@ static void xlp_msi_mask_ack(struct irq_data *d)
xlp_msi_disable(d);
/* Ack MSI on bridge */
- nlm_write_reg(md->lnkbase, PCIE_MSI_STATUS, 1u << vec);
+ if (cpu_is_xlp9xx())
+ nlm_write_reg(md->lnkbase, PCIE_9XX_MSI_STATUS, 1u << vec);
+ else
+ nlm_write_reg(md->lnkbase, PCIE_MSI_STATUS, 1u << vec);
/* Ack at eirr and PIC */
ack_c0_eirr(PIC_PCIE_LINK_MSI_IRQ(link));
- nlm_pic_ack(md->node->picbase, PIC_IRT_PCIE_LINK_INDEX(link));
+ if (cpu_is_xlp9xx())
+ nlm_pic_ack(md->node->picbase,
+ PIC_9XX_IRT_PCIE_LINK_INDEX(link));
+ else
+ nlm_pic_ack(md->node->picbase, PIC_IRT_PCIE_LINK_INDEX(link));
}
static struct irq_chip xlp_msi_chip = {
@@ -172,30 +196,45 @@ static struct irq_chip xlp_msi_chip = {
};
/*
- * The MSI-X interrupt handling is different from MSI, there are 32
- * MSI-X interrupts generated by the PIC and each of these correspond
- * to a MSI-X vector (0-31) that can be assigned.
+ * XLP8XX/4XX/3XX/2XX:
+ * The MSI-X interrupt handling is different from MSI, there are 32 MSI-X
+ * interrupts generated by the PIC and each of these correspond to a MSI-X
+ * vector (0-31) that can be assigned.
+ *
+ * We divide the MSI-X vectors to 8 per link and do a per-link allocation
*
- * We divide the MSI-X vectors to 8 per link and do a per-link
- * allocation
+ * XLP9XX:
+ * 32 MSI-X vectors are available per link, and the interrupts are not routed
+ * thru the PIC. PIC ack not needed.
*
* Enable and disable done using standard MSI functions.
*/
static void xlp_msix_mask_ack(struct irq_data *d)
{
- struct xlp_msi_data *md = irq_data_get_irq_handler_data(d);
+ struct xlp_msi_data *md;
int link, msixvec;
+ uint32_t status_reg, bit;
msixvec = nlm_irq_msixvec(d->irq);
- link = nlm_irq_msixlink(d->irq);
+ link = nlm_irq_msixlink(msixvec);
mask_msi_irq(d);
+ md = irq_data_get_irq_handler_data(d);
/* Ack MSI on bridge */
- nlm_write_reg(md->lnkbase, PCIE_MSIX_STATUS, 1u << msixvec);
+ if (cpu_is_xlp9xx()) {
+ status_reg = PCIE_9XX_MSIX_STATUSX(link);
+ bit = msixvec % XLP_MSIXVEC_PER_LINK;
+ } else {
+ status_reg = PCIE_MSIX_STATUS;
+ bit = msixvec;
+ }
+ nlm_write_reg(md->lnkbase, status_reg, 1u << bit);
/* Ack at eirr and PIC */
ack_c0_eirr(PIC_PCIE_MSIX_IRQ(link));
- nlm_pic_ack(md->node->picbase, PIC_IRT_PCIE_MSIX_INDEX(msixvec));
+ if (!cpu_is_xlp9xx())
+ nlm_pic_ack(md->node->picbase,
+ PIC_IRT_PCIE_MSIX_INDEX(msixvec));
}
static struct irq_chip xlp_msix_chip = {
@@ -206,14 +245,8 @@ static struct irq_chip xlp_msix_chip = {
.irq_unmask = unmask_msi_irq,
};
-void destroy_irq(unsigned int irq)
-{
- /* nothing to do yet */
-}
-
void arch_teardown_msi_irq(unsigned int irq)
{
- destroy_irq(irq);
}
/*
@@ -225,10 +258,18 @@ static void xlp_config_link_msi(uint64_t lnkbase, int lirq, uint64_t msiaddr)
{
u32 val;
- val = nlm_read_reg(lnkbase, PCIE_INT_EN0);
- if ((val & 0x200) == 0) {
- val |= 0x200; /* MSI Interrupt enable */
- nlm_write_reg(lnkbase, PCIE_INT_EN0, val);
+ if (cpu_is_xlp9xx()) {
+ val = nlm_read_reg(lnkbase, PCIE_9XX_INT_EN0);
+ if ((val & 0x200) == 0) {
+ val |= 0x200; /* MSI Interrupt enable */
+ nlm_write_reg(lnkbase, PCIE_9XX_INT_EN0, val);
+ }
+ } else {
+ val = nlm_read_reg(lnkbase, PCIE_INT_EN0);
+ if ((val & 0x200) == 0) {
+ val |= 0x200;
+ nlm_write_reg(lnkbase, PCIE_INT_EN0, val);
+ }
}
val = nlm_read_reg(lnkbase, 0x1); /* CMD */
@@ -275,9 +316,12 @@ static int xlp_setup_msi(uint64_t lnkbase, int node, int link,
spin_lock_irqsave(&md->msi_lock, flags);
if (md->msi_alloc_mask == 0) {
- /* switch the link IRQ to MSI range */
xlp_config_link_msi(lnkbase, lirq, msiaddr);
- irt = PIC_IRT_PCIE_LINK_INDEX(link);
+ /* switch the link IRQ to MSI range */
+ if (cpu_is_xlp9xx())
+ irt = PIC_9XX_IRT_PCIE_LINK_INDEX(link);
+ else
+ irt = PIC_IRT_PCIE_LINK_INDEX(link);
nlm_setup_pic_irq(node, lirq, lirq, irt);
nlm_pic_init_irt(nlm_get_node(node)->picbase, irt, lirq,
node * nlm_threads_per_node(), 1 /*en */);
@@ -298,10 +342,8 @@ static int xlp_setup_msi(uint64_t lnkbase, int node, int link,
xirq = xirq + msivec; /* msi mapped to global irq space */
ret = irq_set_msi_desc(xirq, desc);
- if (ret < 0) {
- destroy_irq(xirq);
+ if (ret < 0)
return ret;
- }
write_msi_msg(xirq, &msg);
return 0;
@@ -319,10 +361,19 @@ static void xlp_config_link_msix(uint64_t lnkbase, int lirq, uint64_t msixaddr)
val |= 0x80000000U;
nlm_write_reg(lnkbase, 0x2C, val);
}
- val = nlm_read_reg(lnkbase, PCIE_INT_EN0);
- if ((val & 0x200) == 0) {
- val |= 0x200; /* MSI Interrupt enable */
- nlm_write_reg(lnkbase, PCIE_INT_EN0, val);
+
+ if (cpu_is_xlp9xx()) {
+ val = nlm_read_reg(lnkbase, PCIE_9XX_INT_EN0);
+ if ((val & 0x200) == 0) {
+ val |= 0x200; /* MSI Interrupt enable */
+ nlm_write_reg(lnkbase, PCIE_9XX_INT_EN0, val);
+ }
+ } else {
+ val = nlm_read_reg(lnkbase, PCIE_INT_EN0);
+ if ((val & 0x200) == 0) {
+ val |= 0x200; /* MSI Interrupt enable */
+ nlm_write_reg(lnkbase, PCIE_INT_EN0, val);
+ }
}
val = nlm_read_reg(lnkbase, 0x1); /* CMD */
@@ -337,10 +388,19 @@ static void xlp_config_link_msix(uint64_t lnkbase, int lirq, uint64_t msixaddr)
val |= (1 << 8) | lirq;
nlm_write_pci_reg(lnkbase, 0xf, val);
- /* MSI-X addresses */
- nlm_write_reg(lnkbase, PCIE_BRIDGE_MSIX_ADDR_BASE, msixaddr >> 8);
- nlm_write_reg(lnkbase, PCIE_BRIDGE_MSIX_ADDR_LIMIT,
- (msixaddr + MSI_ADDR_SZ) >> 8);
+ if (cpu_is_xlp9xx()) {
+ /* MSI-X addresses */
+ nlm_write_reg(lnkbase, PCIE_9XX_BRIDGE_MSIX_ADDR_BASE,
+ msixaddr >> 8);
+ nlm_write_reg(lnkbase, PCIE_9XX_BRIDGE_MSIX_ADDR_LIMIT,
+ (msixaddr + MSI_ADDR_SZ) >> 8);
+ } else {
+ /* MSI-X addresses */
+ nlm_write_reg(lnkbase, PCIE_BRIDGE_MSIX_ADDR_BASE,
+ msixaddr >> 8);
+ nlm_write_reg(lnkbase, PCIE_BRIDGE_MSIX_ADDR_LIMIT,
+ (msixaddr + MSI_ADDR_SZ) >> 8);
+ }
}
/*
@@ -377,6 +437,7 @@ static int xlp_setup_msix(uint64_t lnkbase, int node, int link,
xirq += t;
msixvec = nlm_irq_msixvec(xirq);
+
msg.address_hi = msixaddr >> 32;
msg.address_lo = msixaddr & 0xffffffff;
msg.data = 0xc00 | msixvec;
@@ -417,7 +478,7 @@ void __init xlp_init_node_msi_irqs(int node, int link)
{
struct nlm_soc_info *nodep;
struct xlp_msi_data *md;
- int irq, i, irt, msixvec;
+ int irq, i, irt, msixvec, val;
pr_info("[%d %d] Init node PCI IRT\n", node, link);
nodep = nlm_get_node(node);
@@ -438,19 +499,28 @@ void __init xlp_init_node_msi_irqs(int node, int link)
irq_set_handler_data(i, md);
}
- for (i = 0; i < XLP_MSIXVEC_PER_LINK; i++) {
- /* Initialize MSI-X irts to generate one interrupt per link */
- msixvec = link * XLP_MSIXVEC_PER_LINK + i;
- irt = PIC_IRT_PCIE_MSIX_INDEX(msixvec);
- nlm_pic_init_irt(nodep->picbase, irt, PIC_PCIE_MSIX_IRQ(link),
- node * nlm_threads_per_node(), 1 /* enable */);
+ for (i = 0; i < XLP_MSIXVEC_PER_LINK ; i++) {
+ if (cpu_is_xlp9xx()) {
+ val = ((node * nlm_threads_per_node()) << 7 |
+ PIC_PCIE_MSIX_IRQ(link) << 1 | 0 << 0);
+ nlm_write_pcie_reg(md->lnkbase, PCIE_9XX_MSIX_VECX(i +
+ (link * XLP_MSIXVEC_PER_LINK)), val);
+ } else {
+ /* Initialize MSI-X irts to generate one interrupt
+ * per link
+ */
+ msixvec = link * XLP_MSIXVEC_PER_LINK + i;
+ irt = PIC_IRT_PCIE_MSIX_INDEX(msixvec);
+ nlm_pic_init_irt(nodep->picbase, irt,
+ PIC_PCIE_MSIX_IRQ(link),
+ node * nlm_threads_per_node(), 1);
+ }
/* Initialize MSI-X extended irq space for the link */
irq = nlm_irq_to_xirq(node, nlm_link_msixirq(link, i));
irq_set_chip_and_handler(irq, &xlp_msix_chip, handle_level_irq);
irq_set_handler_data(irq, md);
}
-
}
void nlm_dispatch_msi(int node, int lirq)
@@ -462,7 +532,11 @@ void nlm_dispatch_msi(int node, int lirq)
link = lirq - PIC_PCIE_LINK_MSI_IRQ_BASE;
irqbase = nlm_irq_to_xirq(node, nlm_link_msiirq(link, 0));
md = irq_get_handler_data(irqbase);
- status = nlm_read_reg(md->lnkbase, PCIE_MSI_STATUS) &
+ if (cpu_is_xlp9xx())
+ status = nlm_read_reg(md->lnkbase, PCIE_9XX_MSI_STATUS) &
+ md->msi_enabled_mask;
+ else
+ status = nlm_read_reg(md->lnkbase, PCIE_MSI_STATUS) &
md->msi_enabled_mask;
while (status) {
i = __ffs(status);
@@ -480,10 +554,14 @@ void nlm_dispatch_msix(int node, int lirq)
link = lirq - PIC_PCIE_MSIX_IRQ_BASE;
irqbase = nlm_irq_to_xirq(node, nlm_link_msixirq(link, 0));
md = irq_get_handler_data(irqbase);
- status = nlm_read_reg(md->lnkbase, PCIE_MSIX_STATUS);
+ if (cpu_is_xlp9xx())
+ status = nlm_read_reg(md->lnkbase, PCIE_9XX_MSIX_STATUSX(link));
+ else
+ status = nlm_read_reg(md->lnkbase, PCIE_MSIX_STATUS);
/* narrow it down to the MSI-x vectors for our link */
- status = (status >> (link * XLP_MSIXVEC_PER_LINK)) &
+ if (!cpu_is_xlp9xx())
+ status = (status >> (link * XLP_MSIXVEC_PER_LINK)) &
((1 << XLP_MSIXVEC_PER_LINK) - 1);
while (status) {
diff --git a/arch/mips/pci/ops-pmcmsp.c b/arch/mips/pci/ops-pmcmsp.c
index 3d27800edba..50034f985be 100644
--- a/arch/mips/pci/ops-pmcmsp.c
+++ b/arch/mips/pci/ops-pmcmsp.c
@@ -7,7 +7,7 @@
* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
*
* Much of the code is derived from the original DDB5074 port by
- * Geert Uytterhoeven <geert@sonycom.com>
+ * Geert Uytterhoeven <geert@linux-m68k.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
diff --git a/arch/mips/pci/ops-tx3927.c b/arch/mips/pci/ops-tx3927.c
index 02d64f77e96..d35dc9c9ab9 100644
--- a/arch/mips/pci/ops-tx3927.c
+++ b/arch/mips/pci/ops-tx3927.c
@@ -11,7 +11,7 @@
* Define the pci_ops for TX3927.
*
* Much of the code is derived from the original DDB5074 port by
- * Geert Uytterhoeven <geert@sonycom.com>
+ * Geert Uytterhoeven <geert@linux-m68k.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
diff --git a/arch/mips/pci/ops-tx4927.c b/arch/mips/pci/ops-tx4927.c
index 3d5df514d02..0e046d82e4e 100644
--- a/arch/mips/pci/ops-tx4927.c
+++ b/arch/mips/pci/ops-tx4927.c
@@ -202,17 +202,20 @@ char *tx4927_pcibios_setup(char *str)
unsigned long val;
if (!strncmp(str, "trdyto=", 7)) {
- if (strict_strtoul(str + 7, 0, &val) == 0)
+ u8 val = 0;
+ if (kstrtou8(str + 7, 0, &val) == 0)
tx4927_pci_opts.trdyto = val;
return NULL;
}
if (!strncmp(str, "retryto=", 8)) {
- if (strict_strtoul(str + 8, 0, &val) == 0)
+ u8 val = 0;
+ if (kstrtou8(str + 8, 0, &val) == 0)
tx4927_pci_opts.retryto = val;
return NULL;
}
if (!strncmp(str, "gbwc=", 5)) {
- if (strict_strtoul(str + 5, 0, &val) == 0)
+ u16 val;
+ if (kstrtou16(str + 5, 0, &val) == 0)
tx4927_pci_opts.gbwc = val;
return NULL;
}
diff --git a/arch/mips/pci/pci-virtio-guest.c b/arch/mips/pci/pci-virtio-guest.c
new file mode 100644
index 00000000000..40a078bc461
--- /dev/null
+++ b/arch/mips/pci/pci-virtio-guest.c
@@ -0,0 +1,131 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2013 Cavium, Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+
+#include <uapi/asm/bitfield.h>
+#include <asm/byteorder.h>
+#include <asm/io.h>
+
+#define PCI_CONFIG_ADDRESS 0xcf8
+#define PCI_CONFIG_DATA 0xcfc
+
+union pci_config_address {
+ struct {
+ __BITFIELD_FIELD(unsigned enable_bit : 1, /* 31 */
+ __BITFIELD_FIELD(unsigned reserved : 7, /* 30 .. 24 */
+ __BITFIELD_FIELD(unsigned bus_number : 8, /* 23 .. 16 */
+ __BITFIELD_FIELD(unsigned devfn_number : 8, /* 15 .. 8 */
+ __BITFIELD_FIELD(unsigned register_number : 8, /* 7 .. 0 */
+ )))));
+ };
+ u32 w;
+};
+
+int pcibios_plat_dev_init(struct pci_dev *dev)
+{
+ return 0;
+}
+
+int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+ return ((pin + slot) % 4)+ MIPS_IRQ_PCIA;
+}
+
+static void pci_virtio_guest_write_config_addr(struct pci_bus *bus,
+ unsigned int devfn, int reg)
+{
+ union pci_config_address pca = { .w = 0 };
+
+ pca.register_number = reg;
+ pca.devfn_number = devfn;
+ pca.bus_number = bus->number;
+ pca.enable_bit = 1;
+
+ outl(pca.w, PCI_CONFIG_ADDRESS);
+}
+
+static int pci_virtio_guest_write_config(struct pci_bus *bus,
+ unsigned int devfn, int reg, int size, u32 val)
+{
+ pci_virtio_guest_write_config_addr(bus, devfn, reg);
+
+ switch (size) {
+ case 1:
+ outb(val, PCI_CONFIG_DATA + (reg & 3));
+ break;
+ case 2:
+ outw(val, PCI_CONFIG_DATA + (reg & 2));
+ break;
+ case 4:
+ outl(val, PCI_CONFIG_DATA);
+ break;
+ }
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int pci_virtio_guest_read_config(struct pci_bus *bus, unsigned int devfn,
+ int reg, int size, u32 *val)
+{
+ pci_virtio_guest_write_config_addr(bus, devfn, reg);
+
+ switch (size) {
+ case 1:
+ *val = inb(PCI_CONFIG_DATA + (reg & 3));
+ break;
+ case 2:
+ *val = inw(PCI_CONFIG_DATA + (reg & 2));
+ break;
+ case 4:
+ *val = inl(PCI_CONFIG_DATA);
+ break;
+ }
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops pci_virtio_guest_ops = {
+ .read = pci_virtio_guest_read_config,
+ .write = pci_virtio_guest_write_config,
+};
+
+static struct resource pci_virtio_guest_mem_resource = {
+ .name = "Virtio MEM",
+ .flags = IORESOURCE_MEM,
+ .start = 0x10000000,
+ .end = 0x1dffffff
+};
+
+static struct resource pci_virtio_guest_io_resource = {
+ .name = "Virtio IO",
+ .flags = IORESOURCE_IO,
+ .start = 0,
+ .end = 0xffff
+};
+
+static struct pci_controller pci_virtio_guest_controller = {
+ .pci_ops = &pci_virtio_guest_ops,
+ .mem_resource = &pci_virtio_guest_mem_resource,
+ .io_resource = &pci_virtio_guest_io_resource,
+};
+
+static int __init pci_virtio_guest_setup(void)
+{
+ pr_err("pci_virtio_guest_setup\n");
+
+ /* Virtio comes pre-assigned */
+ pci_set_flags(PCI_PROBE_ONLY);
+
+ pci_virtio_guest_controller.io_map_base = mips_io_port_base;
+ register_pci_controller(&pci_virtio_guest_controller);
+ return 0;
+}
+arch_initcall(pci_virtio_guest_setup);
diff --git a/arch/mips/pci/pci-xlr.c b/arch/mips/pci/pci-xlr.c
index 4427abbd48b..0dde80332d3 100644
--- a/arch/mips/pci/pci-xlr.c
+++ b/arch/mips/pci/pci-xlr.c
@@ -214,14 +214,8 @@ static int get_irq_vector(const struct pci_dev *dev)
}
#ifdef CONFIG_PCI_MSI
-void destroy_irq(unsigned int irq)
-{
- /* nothing to do yet */
-}
-
void arch_teardown_msi_irq(unsigned int irq)
{
- destroy_irq(irq);
}
int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
@@ -263,10 +257,8 @@ int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
MSI_DATA_DELIVERY_FIXED;
ret = irq_set_msi_desc(irq, desc);
- if (ret < 0) {
- destroy_irq(irq);
+ if (ret < 0)
return ret;
- }
write_msi_msg(irq, &msg);
return 0;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-30 16:38:57 +0000