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scsi: ipr: Use pci_irq_allocate_vectors 

Switch the ipr driver to use pci_alloc_irq_vectors.  We need to two
calls to pci_alloc_irq_vectors as ipr only supports multiple MSI-X
vectors, but not multiple MSI vectors.

Otherwise this cleans up a lot of cruft and allows to use a common
request_irq loop for irq types, which happens to only iterate over a
single line in the non MSI-X case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Christoph Hellwig 2016-09-11 15:31:24 +02:00 committed by Martin K. Petersen
parent 68130c9948
commit a299ee62cf
2 changed files with 52 additions and 128 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

173
drivers/scsi/ipr.c
View File

@ -186,16 +186,16 @@ static const struct ipr_chip_cfg_t ipr_chip_cfg[] = {
};
static const struct ipr_chip_t ipr_chip[] = {
{ PCI_VENDOR_ID_MYLEX, PCI_DEVICE_ID_IBM_GEMSTONE, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
{ PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_OBSIDIAN, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN_E, IPR_USE_MSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_SNIPE, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[1] },
{ PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_SCAMP, IPR_USE_LSI, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[1] },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROC_FPGA_E2, IPR_USE_MSI, IPR_SIS64, IPR_MMIO, &ipr_chip_cfg[2] },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE, IPR_USE_MSI, IPR_SIS64, IPR_MMIO, &ipr_chip_cfg[2] },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_RATTLESNAKE, IPR_USE_MSI, IPR_SIS64, IPR_MMIO, &ipr_chip_cfg[2] }
{ PCI_VENDOR_ID_MYLEX, PCI_DEVICE_ID_IBM_GEMSTONE, false, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CITRINE, false, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
{ PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_OBSIDIAN, false, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN, false, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_OBSIDIAN_E, true, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[0] },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_SNIPE, false, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[1] },
{ PCI_VENDOR_ID_ADAPTEC2, PCI_DEVICE_ID_ADAPTEC2_SCAMP, false, IPR_SIS32, IPR_PCI_CFG, &ipr_chip_cfg[1] },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROC_FPGA_E2, true, IPR_SIS64, IPR_MMIO, &ipr_chip_cfg[2] },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CROCODILE, true, IPR_SIS64, IPR_MMIO, &ipr_chip_cfg[2] },
{ PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_RATTLESNAKE, true, IPR_SIS64, IPR_MMIO, &ipr_chip_cfg[2] }
};
static int ipr_max_bus_speeds[] = {
@ -9439,23 +9439,11 @@ static void ipr_free_mem(struct ipr_ioa_cfg *ioa_cfg)
static void ipr_free_irqs(struct ipr_ioa_cfg *ioa_cfg)
{
struct pci_dev *pdev = ioa_cfg->pdev;
int i;
if (ioa_cfg->intr_flag == IPR_USE_MSI ||
ioa_cfg->intr_flag == IPR_USE_MSIX) {
int i;
for (i = 0; i < ioa_cfg->nvectors; i++)
free_irq(ioa_cfg->vectors_info[i].vec,
&ioa_cfg->hrrq[i]);
} else
free_irq(pdev->irq, &ioa_cfg->hrrq[0]);
if (ioa_cfg->intr_flag == IPR_USE_MSI) {
pci_disable_msi(pdev);
ioa_cfg->intr_flag &= ~IPR_USE_MSI;
} else if (ioa_cfg->intr_flag == IPR_USE_MSIX) {
pci_disable_msix(pdev);
ioa_cfg->intr_flag &= ~IPR_USE_MSIX;
}
for (i = 0; i < ioa_cfg->nvectors; i++)
free_irq(pci_irq_vector(pdev, i), &ioa_cfg->hrrq[i]);
pci_free_irq_vectors(pdev);
}
/**
@ -9883,45 +9871,6 @@ static void ipr_wait_for_pci_err_recovery(struct ipr_ioa_cfg *ioa_cfg)
}
}
static int ipr_enable_msix(struct ipr_ioa_cfg *ioa_cfg)
{
struct msix_entry entries[IPR_MAX_MSIX_VECTORS];
int i, vectors;
for (i = 0; i < ARRAY_SIZE(entries); ++i)
entries[i].entry = i;
vectors = pci_enable_msix_range(ioa_cfg->pdev,
entries, 1, ipr_number_of_msix);
if (vectors < 0) {
ipr_wait_for_pci_err_recovery(ioa_cfg);
return vectors;
}
for (i = 0; i < vectors; i++)
ioa_cfg->vectors_info[i].vec = entries[i].vector;
ioa_cfg->nvectors = vectors;
return 0;
}
static int ipr_enable_msi(struct ipr_ioa_cfg *ioa_cfg)
{
int i, vectors;
vectors = pci_enable_msi_range(ioa_cfg->pdev, 1, ipr_number_of_msix);
if (vectors < 0) {
ipr_wait_for_pci_err_recovery(ioa_cfg);
return vectors;
}
for (i = 0; i < vectors; i++)
ioa_cfg->vectors_info[i].vec = ioa_cfg->pdev->irq + i;
ioa_cfg->nvectors = vectors;
return 0;
}
static void name_msi_vectors(struct ipr_ioa_cfg *ioa_cfg)
{
int vec_idx, n = sizeof(ioa_cfg->vectors_info[0].desc) - 1;
@ -9934,19 +9883,20 @@ static void name_msi_vectors(struct ipr_ioa_cfg *ioa_cfg)
}
}
static int ipr_request_other_msi_irqs(struct ipr_ioa_cfg *ioa_cfg)
static int ipr_request_other_msi_irqs(struct ipr_ioa_cfg *ioa_cfg,
struct pci_dev *pdev)
{
int i, rc;
for (i = 1; i < ioa_cfg->nvectors; i++) {
rc = request_irq(ioa_cfg->vectors_info[i].vec,
rc = request_irq(pci_irq_vector(pdev, i),
ipr_isr_mhrrq,
0,
ioa_cfg->vectors_info[i].desc,
&ioa_cfg->hrrq[i]);
if (rc) {
while (--i >= 0)
free_irq(ioa_cfg->vectors_info[i].vec,
free_irq(pci_irq_vector(pdev, i),
&ioa_cfg->hrrq[i]);
return rc;
}
@ -9984,8 +9934,7 @@ static irqreturn_t ipr_test_intr(int irq, void *devp)
* ipr_test_msi - Test for Message Signaled Interrupt (MSI) support.
* @pdev: PCI device struct
*
* Description: The return value from pci_enable_msi_range() can not always be
* trusted. This routine sets up and initiates a test interrupt to determine
* Description: This routine sets up and initiates a test interrupt to determine
* if the interrupt is received via the ipr_test_intr() service routine.
* If the tests fails, the driver will fall back to LSI.
*
@ -9997,6 +9946,7 @@ static int ipr_test_msi(struct ipr_ioa_cfg *ioa_cfg, struct pci_dev *pdev)
int rc;
volatile u32 int_reg;
unsigned long lock_flags = 0;
int irq = pci_irq_vector(pdev, 0);
ENTER;
@ -10008,15 +9958,12 @@ static int ipr_test_msi(struct ipr_ioa_cfg *ioa_cfg, struct pci_dev *pdev)
int_reg = readl(ioa_cfg->regs.sense_interrupt_mask_reg);
spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
if (ioa_cfg->intr_flag == IPR_USE_MSIX)
rc = request_irq(ioa_cfg->vectors_info[0].vec, ipr_test_intr, 0, IPR_NAME, ioa_cfg);
else
rc = request_irq(pdev->irq, ipr_test_intr, 0, IPR_NAME, ioa_cfg);
rc = request_irq(irq, ipr_test_intr, 0, IPR_NAME, ioa_cfg);
if (rc) {
dev_err(&pdev->dev, "Can not assign irq %d\n", pdev->irq);
dev_err(&pdev->dev, "Can not assign irq %d\n", irq);
return rc;
} else if (ipr_debug)
dev_info(&pdev->dev, "IRQ assigned: %d\n", pdev->irq);
dev_info(&pdev->dev, "IRQ assigned: %d\n", irq);
writel(IPR_PCII_IO_DEBUG_ACKNOWLEDGE, ioa_cfg->regs.sense_interrupt_reg32);
int_reg = readl(ioa_cfg->regs.sense_interrupt_reg);
@ -10033,10 +9980,7 @@ static int ipr_test_msi(struct ipr_ioa_cfg *ioa_cfg, struct pci_dev *pdev)
spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
if (ioa_cfg->intr_flag == IPR_USE_MSIX)
free_irq(ioa_cfg->vectors_info[0].vec, ioa_cfg);
else
free_irq(pdev->irq, ioa_cfg);
free_irq(irq, ioa_cfg);
LEAVE;
@ -10060,6 +10004,7 @@ static int ipr_probe_ioa(struct pci_dev *pdev,
int rc = PCIBIOS_SUCCESSFUL;
volatile u32 mask, uproc, interrupts;
unsigned long lock_flags, driver_lock_flags;
unsigned int irq_flag;
ENTER;
@ -10175,18 +10120,18 @@ static int ipr_probe_ioa(struct pci_dev *pdev,
ipr_number_of_msix = IPR_MAX_MSIX_VECTORS;
}
if (ioa_cfg->ipr_chip->intr_type == IPR_USE_MSI &&
ipr_enable_msix(ioa_cfg) == 0)
ioa_cfg->intr_flag = IPR_USE_MSIX;
else if (ioa_cfg->ipr_chip->intr_type == IPR_USE_MSI &&
ipr_enable_msi(ioa_cfg) == 0)
ioa_cfg->intr_flag = IPR_USE_MSI;
else {
ioa_cfg->intr_flag = IPR_USE_LSI;
ioa_cfg->clear_isr = 1;
ioa_cfg->nvectors = 1;
dev_info(&pdev->dev, "Cannot enable MSI.\n");
irq_flag = PCI_IRQ_LEGACY;
if (ioa_cfg->ipr_chip->has_msi)
irq_flag |= PCI_IRQ_MSI | PCI_IRQ_MSIX;
rc = pci_alloc_irq_vectors(pdev, 1, ipr_number_of_msix, irq_flag);
if (rc < 0) {
ipr_wait_for_pci_err_recovery(ioa_cfg);
goto cleanup_nomem;
}
ioa_cfg->nvectors = rc;
if (!pdev->msi_enabled && !pdev->msix_enabled)
ioa_cfg->clear_isr = 1;
pci_set_master(pdev);
@ -10199,33 +10144,22 @@ static int ipr_probe_ioa(struct pci_dev *pdev,
}
}
if (ioa_cfg->intr_flag == IPR_USE_MSI ||
ioa_cfg->intr_flag == IPR_USE_MSIX) {
if (pdev->msi_enabled || pdev->msix_enabled) {
rc = ipr_test_msi(ioa_cfg, pdev);
if (rc == -EOPNOTSUPP) {
switch (rc) {
case 0:
dev_info(&pdev->dev,
"Request for %d MSI%ss succeeded.", ioa_cfg->nvectors,
pdev->msix_enabled ? "-X" : "");
break;
case -EOPNOTSUPP:
ipr_wait_for_pci_err_recovery(ioa_cfg);
if (ioa_cfg->intr_flag == IPR_USE_MSI) {
ioa_cfg->intr_flag &= ~IPR_USE_MSI;
pci_disable_msi(pdev);
} else if (ioa_cfg->intr_flag == IPR_USE_MSIX) {
ioa_cfg->intr_flag &= ~IPR_USE_MSIX;
pci_disable_msix(pdev);
}
pci_free_irq_vectors(pdev);
ioa_cfg->intr_flag = IPR_USE_LSI;
ioa_cfg->nvectors = 1;
}
else if (rc)
break;
default:
goto out_msi_disable;
else {
if (ioa_cfg->intr_flag == IPR_USE_MSI)
dev_info(&pdev->dev,
"Request for %d MSIs succeeded with starting IRQ: %d\n",
ioa_cfg->nvectors, pdev->irq);
else if (ioa_cfg->intr_flag == IPR_USE_MSIX)
dev_info(&pdev->dev,
"Request for %d MSIXs succeeded.",
ioa_cfg->nvectors);
}
}
@ -10273,15 +10207,13 @@ static int ipr_probe_ioa(struct pci_dev *pdev,
ipr_mask_and_clear_interrupts(ioa_cfg, ~IPR_PCII_IOA_TRANS_TO_OPER);
spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
if (ioa_cfg->intr_flag == IPR_USE_MSI
|| ioa_cfg->intr_flag == IPR_USE_MSIX) {
if (pdev->msi_enabled || pdev->msix_enabled) {
name_msi_vectors(ioa_cfg);
rc = request_irq(ioa_cfg->vectors_info[0].vec, ipr_isr,
0,
rc = request_irq(pci_irq_vector(pdev, 0), ipr_isr, 0,
ioa_cfg->vectors_info[0].desc,
&ioa_cfg->hrrq[0]);
if (!rc)
rc = ipr_request_other_msi_irqs(ioa_cfg);
rc = ipr_request_other_msi_irqs(ioa_cfg, pdev);
} else {
rc = request_irq(pdev->irq, ipr_isr,
IRQF_SHARED,
@ -10323,10 +10255,7 @@ cleanup_nolog:
ipr_free_mem(ioa_cfg);
out_msi_disable:
ipr_wait_for_pci_err_recovery(ioa_cfg);
if (ioa_cfg->intr_flag == IPR_USE_MSI)
pci_disable_msi(pdev);
else if (ioa_cfg->intr_flag == IPR_USE_MSIX)
pci_disable_msix(pdev);
pci_free_irq_vectors(pdev);
cleanup_nomem:
iounmap(ipr_regs);
out_disable:

7
drivers/scsi/ipr.h
View File

@ -1413,10 +1413,7 @@ struct ipr_chip_cfg_t {
struct ipr_chip_t {
u16 vendor;
u16 device;
u16 intr_type;
#define IPR_USE_LSI 0x00
#define IPR_USE_MSI 0x01
#define IPR_USE_MSIX 0x02
bool has_msi;
u16 sis_type;
#define IPR_SIS32 0x00
#define IPR_SIS64 0x01
@ -1593,11 +1590,9 @@ struct ipr_ioa_cfg {
struct ipr_cmnd **ipr_cmnd_list;
dma_addr_t *ipr_cmnd_list_dma;
u16 intr_flag;
unsigned int nvectors;
struct {
unsigned short vec;
char desc[22];
} vectors_info[IPR_MAX_MSIX_VECTORS];