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driver: mx_dma: Modify to use dma_pool for prp #10

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Merged
daeyeong-XCENA merged 1 commit into from
Jul 2, 2025
Merged

driver: mx_dma: Modify to use dma_pool for prp #10

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4 changes: 4 additions & 0 deletions init.c
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Original file line number Diff line number Diff line change
Expand Up @@ -299,6 +299,8 @@ static void destroy_mx_pdev(struct pci_dev *pdev)
if (!mx_pdev)
return;

dma_pool_destroy(mx_pdev->page_pool);

mx_engine_exit(&mx_pdev->engine);

for (type = 0; type < NUM_OF_MXDMA_TYPE; type++)
Expand Down Expand Up @@ -369,6 +371,8 @@ static int create_mx_pdev(struct pci_dev *pdev, int cxl_memdev_id)
goto out_fail;
}

mx_pdev->page_pool = dma_pool_create("mxdma_page_pool", &pdev->dev, SINGLE_DMA_SIZE, SINGLE_DMA_SIZE, 0);

mxdma_device_online(pdev);

return 0;
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2 changes: 2 additions & 0 deletions mx_dma.h
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Original file line number Diff line number Diff line change
Expand Up @@ -204,6 +204,8 @@ struct mx_pci_dev {

int num_of_cdev;
struct mx_char_dev mx_cdev[NUM_OF_MXDMA_TYPE];

struct dma_pool *page_pool;
};

extern struct file_operations *mxdma_fops_array[];
Expand Down
6 changes: 4 additions & 2 deletions transfer.c
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Expand Up @@ -12,11 +12,12 @@ module_param(parallel_count, int, 0644);
/******************************************************************************/
static void desc_list_free(struct device *dev, struct mx_transfer *transfer)
{
struct mx_pci_dev *mx_pdev = dev_get_drvdata(dev);
int i;

for (i = 0; i < transfer->desc_list_cnt; i++) {
if (transfer->desc_list_va[i])
dma_free_coherent(dev, SINGLE_DMA_SIZE, transfer->desc_list_va[i], transfer->desc_list_ba[i]);
dma_pool_free(mx_pdev->page_pool, transfer->desc_list_va[i], transfer->desc_list_ba[i]);
}

if (transfer->desc_list_va)
Expand All @@ -27,6 +28,7 @@ static void desc_list_free(struct device *dev, struct mx_transfer *transfer)

static int desc_list_alloc(struct device *dev, struct mx_transfer *transfer, int list_cnt)
{
struct mx_pci_dev *mx_pdev = dev_get_drvdata(dev);
int i;

transfer->desc_list_cnt = list_cnt;
Expand All @@ -37,7 +39,7 @@ static int desc_list_alloc(struct device *dev, struct mx_transfer *transfer, int
void *cpu_addr;
dma_addr_t bus_addr;

cpu_addr = dma_alloc_coherent(dev, SINGLE_DMA_SIZE, &bus_addr, GFP_KERNEL);
cpu_addr = dma_pool_alloc(mx_pdev->page_pool, GFP_ATOMIC, &bus_addr);
if (!cpu_addr)
goto fail;

Expand Down