mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 11:50:52 +07:00
skd: use pci_alloc_irq_vectors
Switch the skd driver to use pci_alloc_irq_vectors. We need to two calls to pci_alloc_irq_vectors as skd only supports multiple MSI-X vectors, but not multiple MSI vectors. Otherwise this cleans up a lot of cruft and allows to a lot more common code. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig
Jens Axboe
parent
feebd56872
commit
180b0ae77d
@ -270,8 +270,6 @@ struct skd_device {
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resource_size_t mem_phys[SKD_MAX_BARS];
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u32 mem_size[SKD_MAX_BARS];
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skd_irq_type_t irq_type;
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u32 msix_count;
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struct skd_msix_entry *msix_entries;
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struct pci_dev *pdev;
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@ -3821,10 +3819,6 @@ static irqreturn_t skd_qfull_isr(int irq, void *skd_host_data)
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*/
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struct skd_msix_entry {
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int have_irq;
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u32 vector;
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u32 entry;
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struct skd_device *rsp;
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char isr_name[30];
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};
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@ -3853,56 +3847,21 @@ static struct skd_init_msix_entry msix_entries[SKD_MAX_MSIX_COUNT] = {
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{ "(Queue Full 3)", skd_qfull_isr },
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};
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static void skd_release_msix(struct skd_device *skdev)
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{
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struct skd_msix_entry *qentry;
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int i;
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if (skdev->msix_entries) {
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for (i = 0; i < skdev->msix_count; i++) {
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qentry = &skdev->msix_entries[i];
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skdev = qentry->rsp;
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if (qentry->have_irq)
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devm_free_irq(&skdev->pdev->dev,
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qentry->vector, qentry->rsp);
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}
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kfree(skdev->msix_entries);
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}
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if (skdev->msix_count)
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pci_disable_msix(skdev->pdev);
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skdev->msix_count = 0;
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skdev->msix_entries = NULL;
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}
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static int skd_acquire_msix(struct skd_device *skdev)
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{
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int i, rc;
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struct pci_dev *pdev = skdev->pdev;
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struct msix_entry *entries;
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struct skd_msix_entry *qentry;
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entries = kzalloc(sizeof(struct msix_entry) * SKD_MAX_MSIX_COUNT,
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GFP_KERNEL);
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if (!entries)
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return -ENOMEM;
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for (i = 0; i < SKD_MAX_MSIX_COUNT; i++)
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entries[i].entry = i;
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rc = pci_enable_msix_exact(pdev, entries, SKD_MAX_MSIX_COUNT);
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if (rc) {
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rc = pci_alloc_irq_vectors(pdev, SKD_MAX_MSIX_COUNT, SKD_MAX_MSIX_COUNT,
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PCI_IRQ_MSIX);
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if (rc < 0) {
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pr_err("(%s): failed to enable MSI-X %d\n",
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skd_name(skdev), rc);
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goto msix_out;
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}
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skdev->msix_count = SKD_MAX_MSIX_COUNT;
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skdev->msix_entries = kzalloc(sizeof(struct skd_msix_entry) *
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skdev->msix_count, GFP_KERNEL);
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skdev->msix_entries = kcalloc(SKD_MAX_MSIX_COUNT,
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sizeof(struct skd_msix_entry), GFP_KERNEL);
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if (!skdev->msix_entries) {
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rc = -ENOMEM;
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pr_err("(%s): msix table allocation error\n",
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@ -3910,136 +3869,98 @@ static int skd_acquire_msix(struct skd_device *skdev)
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goto msix_out;
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}
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for (i = 0; i < skdev->msix_count; i++) {
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qentry = &skdev->msix_entries[i];
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qentry->vector = entries[i].vector;
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qentry->entry = entries[i].entry;
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qentry->rsp = NULL;
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qentry->have_irq = 0;
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pr_debug("%s:%s:%d %s: <%s> msix (%d) vec %d, entry %x\n",
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skdev->name, __func__, __LINE__,
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pci_name(pdev), skdev->name,
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i, qentry->vector, qentry->entry);
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}
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/* Enable MSI-X vectors for the base queue */
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for (i = 0; i < skdev->msix_count; i++) {
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qentry = &skdev->msix_entries[i];
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for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) {
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struct skd_msix_entry *qentry = &skdev->msix_entries[i];
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snprintf(qentry->isr_name, sizeof(qentry->isr_name),
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"%s%d-msix %s", DRV_NAME, skdev->devno,
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msix_entries[i].name);
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rc = devm_request_irq(&skdev->pdev->dev, qentry->vector,
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msix_entries[i].handler, 0,
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qentry->isr_name, skdev);
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rc = devm_request_irq(&skdev->pdev->dev,
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pci_irq_vector(skdev->pdev, i),
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msix_entries[i].handler, 0,
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qentry->isr_name, skdev);
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if (rc) {
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pr_err("(%s): Unable to register(%d) MSI-X "
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"handler %d: %s\n",
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skd_name(skdev), rc, i, qentry->isr_name);
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goto msix_out;
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} else {
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qentry->have_irq = 1;
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qentry->rsp = skdev;
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}
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}
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pr_debug("%s:%s:%d %s: <%s> msix %d irq(s) enabled\n",
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skdev->name, __func__, __LINE__,
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pci_name(pdev), skdev->name, skdev->msix_count);
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pci_name(pdev), skdev->name, SKD_MAX_MSIX_COUNT);
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return 0;
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msix_out:
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if (entries)
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kfree(entries);
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skd_release_msix(skdev);
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while (--i >= 0)
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devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), skdev);
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kfree(skdev->msix_entries);
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skdev->msix_entries = NULL;
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return rc;
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}
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static int skd_acquire_irq(struct skd_device *skdev)
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{
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struct pci_dev *pdev = skdev->pdev;
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unsigned int irq_flag = PCI_IRQ_LEGACY;
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int rc;
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struct pci_dev *pdev;
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pdev = skdev->pdev;
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skdev->msix_count = 0;
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RETRY_IRQ_TYPE:
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switch (skdev->irq_type) {
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case SKD_IRQ_MSIX:
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if (skd_isr_type == SKD_IRQ_MSIX) {
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rc = skd_acquire_msix(skdev);
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if (!rc)
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pr_info("(%s): MSI-X %d irqs enabled\n",
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skd_name(skdev), skdev->msix_count);
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else {
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pr_err(
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"(%s): failed to enable MSI-X, re-trying with MSI %d\n",
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skd_name(skdev), rc);
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skdev->irq_type = SKD_IRQ_MSI;
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goto RETRY_IRQ_TYPE;
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}
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break;
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case SKD_IRQ_MSI:
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snprintf(skdev->isr_name, sizeof(skdev->isr_name), "%s%d-msi",
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DRV_NAME, skdev->devno);
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rc = pci_enable_msi_range(pdev, 1, 1);
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if (rc > 0) {
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rc = devm_request_irq(&pdev->dev, pdev->irq, skd_isr, 0,
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skdev->isr_name, skdev);
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if (rc) {
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pci_disable_msi(pdev);
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pr_err(
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"(%s): failed to allocate the MSI interrupt %d\n",
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skd_name(skdev), rc);
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goto RETRY_IRQ_LEGACY;
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}
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pr_info("(%s): MSI irq %d enabled\n",
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skd_name(skdev), pdev->irq);
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} else {
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RETRY_IRQ_LEGACY:
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pr_err(
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"(%s): failed to enable MSI, re-trying with LEGACY %d\n",
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skd_name(skdev), rc);
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skdev->irq_type = SKD_IRQ_LEGACY;
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goto RETRY_IRQ_TYPE;
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}
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break;
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case SKD_IRQ_LEGACY:
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snprintf(skdev->isr_name, sizeof(skdev->isr_name),
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"%s%d-legacy", DRV_NAME, skdev->devno);
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rc = devm_request_irq(&pdev->dev, pdev->irq, skd_isr,
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IRQF_SHARED, skdev->isr_name, skdev);
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if (!rc)
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pr_info("(%s): LEGACY irq %d enabled\n",
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skd_name(skdev), pdev->irq);
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else
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pr_err("(%s): request LEGACY irq error %d\n",
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skd_name(skdev), rc);
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break;
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default:
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pr_info("(%s): irq_type %d invalid, re-set to %d\n",
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skd_name(skdev), skdev->irq_type, SKD_IRQ_DEFAULT);
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skdev->irq_type = SKD_IRQ_LEGACY;
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goto RETRY_IRQ_TYPE;
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return 0;
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pr_err("(%s): failed to enable MSI-X, re-trying with MSI %d\n",
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skd_name(skdev), rc);
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}
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return rc;
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snprintf(skdev->isr_name, sizeof(skdev->isr_name), "%s%d", DRV_NAME,
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skdev->devno);
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if (skd_isr_type != SKD_IRQ_LEGACY)
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irq_flag |= PCI_IRQ_MSI;
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rc = pci_alloc_irq_vectors(pdev, 1, 1, irq_flag);
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if (rc < 0) {
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pr_err("(%s): failed to allocate the MSI interrupt %d\n",
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skd_name(skdev), rc);
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return rc;
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}
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rc = devm_request_irq(&pdev->dev, pdev->irq, skd_isr,
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pdev->msi_enabled ? 0 : IRQF_SHARED,
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skdev->isr_name, skdev);
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if (rc) {
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pci_free_irq_vectors(pdev);
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pr_err("(%s): failed to allocate interrupt %d\n",
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skd_name(skdev), rc);
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return rc;
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}
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return 0;
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}
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static void skd_release_irq(struct skd_device *skdev)
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{
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switch (skdev->irq_type) {
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case SKD_IRQ_MSIX:
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skd_release_msix(skdev);
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break;
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case SKD_IRQ_MSI:
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devm_free_irq(&skdev->pdev->dev, skdev->pdev->irq, skdev);
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pci_disable_msi(skdev->pdev);
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break;
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case SKD_IRQ_LEGACY:
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devm_free_irq(&skdev->pdev->dev, skdev->pdev->irq, skdev);
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break;
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default:
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pr_err("(%s): wrong irq type %d!",
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skd_name(skdev), skdev->irq_type);
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break;
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struct pci_dev *pdev = skdev->pdev;
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if (skdev->msix_entries) {
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int i;
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for (i = 0; i < SKD_MAX_MSIX_COUNT; i++) {
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devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i),
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skdev);
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}
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kfree(skdev->msix_entries);
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skdev->msix_entries = NULL;
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} else {
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devm_free_irq(&pdev->dev, pdev->irq, skdev);
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}
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pci_free_irq_vectors(pdev);
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}
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/*
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@ -4402,7 +4323,6 @@ static struct skd_device *skd_construct(struct pci_dev *pdev)
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skdev->pdev = pdev;
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skdev->devno = skd_next_devno++;
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skdev->major = blk_major;
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skdev->irq_type = skd_isr_type;
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sprintf(skdev->name, DRV_NAME "%d", skdev->devno);
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skdev->dev_max_queue_depth = 0;
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