Commit 5893c2e5 authored by Kishon Vijay Abraham I's avatar Kishon Vijay Abraham I Committed by Lorenzo Pieralisi

PCI: endpoint: functions/pci-epf-test: Print throughput information

Print throughput information in KB/s after every completed transfer,
including information on whether DMA is used or not.
Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: default avatarAlan Mikhak <alan.mikhak@sifive.com>
parent 5ebf3fc5
......@@ -190,6 +190,36 @@ static void pci_epf_test_clean_dma_chan(struct pci_epf_test *epf_test)
epf_test->dma_chan = NULL;
}
static void pci_epf_test_print_rate(const char *ops, u64 size,
struct timespec64 *start,
struct timespec64 *end, bool dma)
{
struct timespec64 ts;
u64 rate, ns;
ts = timespec64_sub(*end, *start);
/* convert both size (stored in 'rate') and time in terms of 'ns' */
ns = timespec64_to_ns(&ts);
rate = size * NSEC_PER_SEC;
/* Divide both size (stored in 'rate') and ns by a common factor */
while (ns > UINT_MAX) {
rate >>= 1;
ns >>= 1;
}
if (!ns)
return;
/* calculate the rate */
do_div(rate, (uint32_t)ns);
pr_info("\n%s => Size: %llu bytes\t DMA: %s\t Time: %llu.%09u seconds\t"
"Rate: %llu KB/s\n", ops, size, dma ? "YES" : "NO",
(u64)ts.tv_sec, (u32)ts.tv_nsec, rate / 1024);
}
static int pci_epf_test_copy(struct pci_epf_test *epf_test)
{
int ret;
......@@ -198,6 +228,7 @@ static int pci_epf_test_copy(struct pci_epf_test *epf_test)
void __iomem *dst_addr;
phys_addr_t src_phys_addr;
phys_addr_t dst_phys_addr;
struct timespec64 start, end;
struct pci_epf *epf = epf_test->epf;
struct device *dev = &epf->dev;
struct pci_epc *epc = epf->epc;
......@@ -236,6 +267,7 @@ static int pci_epf_test_copy(struct pci_epf_test *epf_test)
goto err_dst_addr;
}
ktime_get_ts64(&start);
use_dma = !!(reg->flags & FLAG_USE_DMA);
if (use_dma) {
if (!epf_test->dma_supported) {
......@@ -251,6 +283,8 @@ static int pci_epf_test_copy(struct pci_epf_test *epf_test)
} else {
memcpy(dst_addr, src_addr, reg->size);
}
ktime_get_ts64(&end);
pci_epf_test_print_rate("COPY", reg->size, &start, &end, use_dma);
err_map_addr:
pci_epc_unmap_addr(epc, epf->func_no, dst_phys_addr);
......@@ -277,6 +311,7 @@ static int pci_epf_test_read(struct pci_epf_test *epf_test)
bool use_dma;
phys_addr_t phys_addr;
phys_addr_t dst_phys_addr;
struct timespec64 start, end;
struct pci_epf *epf = epf_test->epf;
struct device *dev = &epf->dev;
struct pci_epc *epc = epf->epc;
......@@ -322,17 +357,23 @@ static int pci_epf_test_read(struct pci_epf_test *epf_test)
goto err_dma_map;
}
ktime_get_ts64(&start);
ret = pci_epf_test_data_transfer(epf_test, dst_phys_addr,
phys_addr, reg->size);
if (ret)
dev_err(dev, "Data transfer failed\n");
ktime_get_ts64(&end);
dma_unmap_single(dma_dev, dst_phys_addr, reg->size,
DMA_FROM_DEVICE);
} else {
ktime_get_ts64(&start);
memcpy_fromio(buf, src_addr, reg->size);
ktime_get_ts64(&end);
}
pci_epf_test_print_rate("READ", reg->size, &start, &end, use_dma);
crc32 = crc32_le(~0, buf, reg->size);
if (crc32 != reg->checksum)
ret = -EIO;
......@@ -358,6 +399,7 @@ static int pci_epf_test_write(struct pci_epf_test *epf_test)
bool use_dma;
phys_addr_t phys_addr;
phys_addr_t src_phys_addr;
struct timespec64 start, end;
struct pci_epf *epf = epf_test->epf;
struct device *dev = &epf->dev;
struct pci_epc *epc = epf->epc;
......@@ -406,17 +448,23 @@ static int pci_epf_test_write(struct pci_epf_test *epf_test)
goto err_dma_map;
}
ktime_get_ts64(&start);
ret = pci_epf_test_data_transfer(epf_test, phys_addr,
src_phys_addr, reg->size);
if (ret)
dev_err(dev, "Data transfer failed\n");
ktime_get_ts64(&end);
dma_unmap_single(dma_dev, src_phys_addr, reg->size,
DMA_TO_DEVICE);
} else {
ktime_get_ts64(&start);
memcpy_toio(dst_addr, buf, reg->size);
ktime_get_ts64(&end);
}
pci_epf_test_print_rate("WRITE", reg->size, &start, &end, use_dma);
/*
* wait 1ms inorder for the write to complete. Without this delay L3
* error in observed in the host system.
......
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